US Patent No: 5,101,501

Number of patents in Portfolio can not be more than 2000

Method and system for providing a soft handoff in communications in a CDMA cellular telephone system

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Abstract

In a cellular telephone system a system for directing communications between a mobile user and cell-sites as a mobile user changes cell-site service areas. The mobile user includes an apparatus for, while in communication with another system user via one cell-site, determining a transition of the mobile user from the cell-site service area to the service area of another cell-site. The system includes circuitry responsive to the indication for coupling communications between the mobile user and the other system user via the new cell-site while the mobile user also remains in communication with the system user via the first cell-site. The system further includes apparatus responsive to the coupling of the communications between the mobile user and the other system user via the new cell-site for terminating the communications between the mobile user and another system user via cell-site with communications continuing between the mobile user and the system user via the new cell-site.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
QUALCOMM INCORPORATEDSAN DIEGO, CA7516

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gilhousen, Klein S Bozeman, MT 82 11527
Padovani, Roberto San Diego, CA 140 9356
Wheatley, III Charles E Del Mar, CA 80 7758

Cited Art

Patent Info (Count) # Cites Year
 
BELL TELEPHONE LABORATORIES, INCORPORATED (1)
4,398,063 Mobile telephone interoffice handoff limiting method and apparatus 54 1980
 
PURDUE RESEARCH FOUNDATION (1)
4,222,115 Spread spectrum apparatus for cellular mobile communication systems 299 1978
 
RADIO FREQUENCY SYSTEMS, INC. (1)
4,608,711 Cellular mobile radio hand-off utilizing voice channel 59 1984
 
U.S. PHILIPS CORPORATION (1)
4,765,753 Method and apparatus for handing-over a radio connection from one radio cell to another radio cell of a digital radio transmission system 270 1987

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
QUALCOMM INCORPORATED (292)
5,267,261 Mobile station assisted soft handoff in a CDMA cellular communications system 610 1992
5,280,472 CDMA microcellular telephone system and distributed antenna system therefor 382 1992
5,437,055 Antenna system for multipath diversity in an indoor microcellular communication system 97 1993
5,513,176 Dual distributed antenna system 127 1993
5,490,165 Demodulation element assignment in a system capable of receiving multiple signals 215 1993
5,715,236 System and method for generating signal waveforms in a CDMA cellular telephone system 84 1993
5,640,414 Mobile station assisted soft handoff in a CDMA cellular communications system 274 1994
6,914,965 Method and apparatus of providing a single state mobile unit in a modem connection comprising a wireless link 3 1994
6,157,668 Method and apparatus for reducing the average transmit power of a base station 46 1994
5,697,055 Method and apparatus for handoff between different cellular communications systems 109 1994
5,577,022 Pilot signal searching technique for a cellular communications system 130 1994
5,577,265 Antenna system for multipath diversity in an indoor microcellular communication system 47 1994
5,602,833 Method and apparatus for using Walsh shift keying in a spread spectrum communication system 143 1994
5,533,011 Dual distributed antenna system 87 1994
5,691,974 Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking individual recipient phase, time and energy 165 1995
5,654,979 Cell site demodulation architecture for a spread spectrum multiple access communication systems 89 1995
5,625,876 Method and apparatus for performing handoff between sectors of a common base station 119 1995
5,594,718 Method and apparatus for providing mobile unit assisted hard handoff from a CDMA communication system to an alternative access communication system 137 1995
5,608,722 Multi-user communication system architecture with distributed receivers 164 1995
5,841,806 Method and apparatus for the transmission of energy-scaled variable rate data 32 1995
5,602,834 Linear coverage area antenna system for a CDMA communication system 22 1995
5,764,687 Mobile demodulator architecture for a spread spectrum multiple access communication system 168 1995
5,805,648 Method and apparatus for performing search acquisition in a CDMA communication system 73 1995
5,680,395 Method and apparatus for time division duplex pilot signal generation 48 1995
6,108,364 Time division duplex repeater for use in a CDMA system 56 1995
6,137,840 Method and apparatus for performing fast power control in a mobile communication system 88 1995
5,907,813 Signal acquisition in a wireless communication system by transmitting repeated access probes from a terminal to a hub 22 1995
5,878,036 Wireless telecommunications system utilizing CDMA radio frequency signal modulation in conjunction with the GSM A-interface telecommunications network protocol 99 1995
5,867,763 Method and apparatus for integration of a wireless communication system with a cable T.V. system 30 1996
5,839,052 Method and apparatus for integration of a wireless communication system with a cable television system 37 1996
5,978,679 Coexisting GSM and CDMA wireless telecommunications networks 67 1996
5,884,187 Method and apparatus for providing centralized power control administration for a set of base stations 119 1996
5,644,591 Method and apparatus for performing search acquisition in a CDMA communications system 137 1996
5,926,470 Method and apparatus for providing diversity in hard handoff for a CDMA system 62 1996
5,917,811 Method and apparatus for measurement directed hard handoff in a CDMA system 50 1996
5,828,661 Method and apparatus for providing a cone of silence in a cellular communication system 46 1996
5,848,063 Method and apparatus for hard handoff in a CDMA system 76 1996
5,930,230 High data rate CDMA wireless communication system 98 1996
5,859,840 Spread spectrum communication system which defines channel groups comprising selected channels that are additional to a primary channel and transmits group messages during call set up 86 1996
6,021,122 Method and apparatus for performing idle handoff in a multiple access communication system 38 1996
5,926,500 Reduced peak-to-average transmit power high data rate CDMA wireless communication system 56 1996
5,790,589 System and method for rapidly reacquiring a pilot channel 42 1996
5,893,035 Centralized forward link power control 87 1996
6,233,456 Method and apparatus for adjacent coverage area handoff in communication systems 24 1996
6,496,543 Method and apparatus for providing high speed data communications in a cellular environment 47 1996
5,757,767 Method and apparatus for joint transmission of multiple data signals in spread spectrum communication systems 92 1996
5,933,787 Method and apparatus for performing handoff between sectors of a common base station 63 1996
6,173,007 High-data-rate supplemental channel for CDMA telecommunications system 46 1997
5,940,761 Method and apparatus for performing mobile assisted hard handoff between communication systems 35 1997
6,151,502 Method and apparatus for performing soft hand-off in a wireless communication system 80 1997
5,933,781 Pilot based, reversed channel power control 64 1997
6,335,922 Method and apparatus for forward link rate scheduling 129 1997
5,987,326 Transmit power reduction for a high speed CDMA link in soft handoff 70 1997
5,991,284 Subchannel control loop 58 1997
5,982,758 Method and apparatus for merging neighbor lists in a CDMA mobile telephone system 33 1997
5,777,990 Method and apparatus for providing variable rate data in a communications system using non-orthogonal overflow channels 52 1997
6,396,867 Method and apparatus for forward link power control 56 1997
6,002,933 Inter-system soft handoff 25 1997
6,999,766 Method and apparatus for optimization of a cellular network 7 1997
5,982,760 Method and apparatus for power adaptation control in closed-loop communications 130 1997
5,864,760 Method and apparatus for reducing the average transmit power from a sectorized base station 34 1997
6,426,960 Increased capacity data transmission in a CDMA wireless communication system 37 1997
6,396,804 High data rate CDMA wireless communication system 77 1997
6,055,428 Method and apparatus for performing soft hand-off in a wireless communication system 40 1997
6,185,199 Method and apparatus for data transmission using time gated frequency division duplexing 25 1997
6,188,678 Method and apparatus for adaptive closed loop power control using open loop measurements 57 1997
6,147,981 Method and apparatus for predictive parameter control with loop delay 29 1997
5,953,320 Method and apparatus for constructing a temporary list of neighboring base stations in a wireless communication device 24 1997
6,070,085 Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers 23 1997
6,097,972 Method and apparatus for processing power control signals in CDMA mobile telephone system 70 1997
6,307,849 Method and system for changing forward traffic channel power allocation during soft handoff 68 1997
6,215,777 Method and apparatus for transmitting and receiving data multiplexed onto multiple code channels, frequencies and base stations 32 1997
6,101,179 Accurate open loop power control in a code division multiple access communication system 100 1997
6,292,476 Method and apparatus for providing variable rate data in a communications system using non-orthogonal overflow channels 15 1997
6,035,209 Method and apparatus for performing fast power control in a mobile communication system 64 1997
6,574,211 Method and apparatus for high rate packet data transmission 318 1997
6,307,840 Mobile station assisted timing synchronization in CDMA communication system 70 1998
6,198,928 Handover method, and a cellular radio system 9 1998
6,101,173 Adaptive reacquisition time in a slotted paging environment 16 1998
6,201,954 Method and system for providing an estimate of the signal strength of a received signal 29 1998
6,216,004 Cellular communication system with common channel soft handoff and associated method 106 1998
6,510,172 Multi-user communication system architecture with distributed transmitters 23 1998
6,320,873 CDMA transmission of packet-switched data 127 1998
6,310,869 Method and apparatus for reducing amplitude variations and interference in communication signals, such as in wireless communication signals employing inserted pilot symbols 15 1998
6,201,827 System and method for probability based lock detection 3 1998
6,252,865 Methods and apparatuses for fast power control of signals transmitted on a multiple access channel 41 1998
5,949,814 High-data-rate supplemental channel for CDMA telecommunications system 34 1998
6,208,873 Method and apparatus for transmitting reverse link power control signals based on the probability that the power control command is in error 37 1998
6,314,125 Method and apparatus for the construction and transmission of binary quasi orthogonal vectors 8 1998
6,847,658 Demultiplexer for channel interleaving 2 1998
6,130,923 Lock detection for multipath wireless receiver 6 1998
6,424,619 High data rate CDMA wireless communication system 7 1999
6,151,311 Mobile station assisted timing synchronization in a CDMA communication system 36 1999
6,721,349 Method and apparatus for reducing peak-to-average ratio in a CDMA communication system 7 1999
6,545,989 Transmit gating in a wireless communication system 22 1999
6,229,841 Method and apparatus for energy estimation in a wireless receiver capable of receiving multiple instances of a common signal 4 1999
6,356,528 Interleaver and deinterleaver for use in a diversity transmission communication system 34 1999
6,925,067 Configuration of overhead channels in a mixed bandwidth system 7 1999
6,304,563 Method and apparatus for processing a punctured pilot channel 28 1999
6,690,938 System and method for reducing dropped calls in a wireless communications network 22 1999
6,304,755 Method and apparatus for performing mobile assisted hard handoff between communication systems 39 1999
6,597,922 Method and apparatus for efficient candidate frequency search while initiating a handoff in a code division multiple access communication system 14 1999
6,351,460 Method and apparatus for a dedicated control channel in an early soft handoff in a code division multiple access communication system 15 1999
7,054,284 Method and apparatus for supervising a potentially gated signal in a wireless communication system 0 1999
6,421,327 Method and apparatus for controlling transmission energy in a communication system employing orthogonal transmit diversity 37 1999
6,363,060 Method and apparatus for fast WCDMA acquisition 82 1999
6,240,071 Subchannel control loop 12 1999
6,404,760 CDMA multiple access interference cancellation using signal estimation 59 1999
6,480,472 Mobile station supervision of the forward dedicated control channel when in the discontinuous transmission mode 19 1999
6,693,951 System and method for generating signal waveforms in a CDMA cellular telephone system 12 1999
6,496,706 Method and system for transmit gating in a wireless communication system 28 1999
6,298,051 High-data-rate supplemental channel for CDMA telecommunications system 19 1999
6,633,552 Method and apparatus for determining the closed loop power control set point in a wireless packet data communication system 34 1999
8,064,409 Method and apparatus using a multi-carrier forward link in a wireless communication system 3 1999
6,640,236 Method and apparatus for generating multiple bits of a pseudonoise sequence with each clock pulse by computing the bits in parallel 5 1999
6,542,743 Method and apparatus for reducing pilot search times utilizing mobile station location information 75 1999
6,606,485 Candidate system search and soft handoff between frequencies in a multi-carrier mobile communication system 9 1999
6,757,553 Base station beam sweeping method and apparatus using multiple rotating antennas 12 1999
6,771,700 Method and apparatus for minimizing total transmission energy in a communication system employing retransmission of frame received in error 10 1999
6,674,736 Method and apparatus for performing idle handoff in a multiple access communication system 13 1999
6,466,606 Method and apparatus for performing search acquisition in a multi-carrier communication system 14 1999
6,269,250 Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers 9 2000
6,546,248 Method and apparatus for generating pilot strength measurement messages 14 2000
7,929,494 High-speed data transmission in a digital mobile communication system 0 2000
6,724,739 Method for handoff between an asynchronous CDMA base station and a synchronous CDMA base station 11 2000
7,876,729 Intersystem base station handover 4 2000
6,775,252 Dynamic adjustment of search window size in response to signal strength 20 2000
6,535,739 Method of handoff within a telecommunications system containing digital base stations with different spectral capabilities 10 2000
6,694,469 Method and an apparatus for a quick retransmission of signals in a communication system 26 2000
6,751,199 Method and apparatus for a rate control in a high data rate communication system 20 2000
6,654,611 Method and apparatus for performing idle handoff in a multiple access communication system 3 2000
7,254,118 Method and apparatus in a CDMA communication system 4 2000
6,760,313 Method and apparatus for adaptive rate selection in a communication system 34 2000
6,529,527 Method and apparatus for carrying packetized voice and data in wireless communication networks 11 2000
6,501,787 High-data-rate supplemental channel for CDMA telecommunications system 12 2000
7,006,470 Method and apparatus for performing idle handoff in a multiple access communication system 2 2000
7,042,869 Method and apparatus for gated ACK/NAK channel in a communication system 7 2000
7,945,266 Method and apparatus for call recovery in a wireless communication system 1 2000
6,560,211 Method and apparatus for variable and fixed forward link rate control in a mobile radio communication system 14 2000
6,549,780 Method and apparatus for adjacent service area handoff in communication systems 6 2000
7,567,781 Method and apparatus for power level adjustment in a wireless communication system 2 2001
7,085,239 Method and apparatus for determining the forward link closed loop power control set point in a wireless packet data communication system 7 2001
6,678,311 High data CDMA wireless communication system using variable sized channel codes 4 2001
7,843,863 Subchannel control loop 0 2001
6,621,875 High data rate CDMA wireless communication system using variable sized channel codes 2 2001
8,199,696 Method and apparatus for power control in a wireless communication system 1 2001
6,594,500 Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers 39 2001
6,961,545 Method and system for providing antenna diversity 21 2001
7,778,642 Method and system for processing telephone calls involving two digital wireless subscriber units that avoid double vocoding 0 2001
7,295,531 Mobile station assisted timing synchronization in a CDMA communication system 5 2001
7,167,460 Method and apparatus for providing variable rate data in a communications system using non-orthogonal overflow channels 6 2001
7,961,616 Method and apparatus for congestion control in a wireless communication system 2 2001
6,983,153 Method and apparatus for congestion control in a wireless communication system 8 2001
7,009,953 Method and system for changing forward traffic channel power allocation during soft handoff 9 2001
7,013,160 Method and apparatus for performing fast power control in a mobile communication system 12 2001
7,054,293 Method and apparatus for forward link rate scheduling 19 2001
6,823,192 Method and apparatus for quick paging in a wireless communication system 17 2001
6,574,210 High-data-rate supplemental channel for CDMA telecommunications system 7 2001
8,121,296 Method and apparatus for security in a data processing system 0 2001
7,693,508 Method and apparatus for broadcast signaling in a wireless communication system 4 2001
7,471,657 Method and apparatus for processing a punctured pilot channel 1 2001
7,349,425 Method and apparatus for overhead messaging in a wireless communication system 10 2001
7,031,666 Method and apparatus for header compression in a wireless communication system 4 2001
6,909,702 Method and apparatus for out-of-band transmission of broadcast service option in a wireless communication system 43 2001
6,707,801 Method and apparatus for data transport in a wireless communication system 39 2001
6,810,254 Method and apparatus for performing mobile assisted hard handoff between communication systems 20 2001
7,697,523 Method and apparatus for data packet transport in a wireless communication system using an internet protocol 0 2001
7,352,868 Method and apparatus for security in a data processing system 8 2001
6,807,426 Method and apparatus for scheduling transmissions in a communication system 50 2001
6,680,925 Method and system for selecting a best serving sector in a CDMA data communication system 5 2001
7,158,498 Interleaver and deinterleaver for use in a diversity transmission communication system 4 2001
8,077,679 Method and apparatus for providing protocol options in a wireless communication system 1 2001
6,990,091 Method and apparatus for fast WCDMA acquisition 6 2001
6,788,687 Method and apparatus for scheduling packet data transmissions in a wireless communication system 25 2001
7,184,789 Method and apparatus for data packet transport in a wireless communication system using an internet protocol 10 2001
6,714,512 Method and apparatus for a dedicated control channel in an early soft handoff in a code division multiple access communication system 4 2001
8,126,127 Method and apparatus for provision of broadcast service information 0 2002
6,549,525 High data rate CDMA wireless communication system 5 2002
6,757,320 Method and apparatus for forward link power control 14 2002
7,155,235 Method and apparatus for conserving home agent resources in mobile IP deployment 3 2002
7,949,066 Method and apparatus for providing high speed data communications in a cellular environment 1 2002
7,292,552 Method and apparatus for reducing interference in a wireless communication system 14 2002
7,035,284 Method and apparatus for reducing inter-channel interference in a wireless communication system employing a non-periodic interleaver 19 2002
6,535,496 Receiver method and apparatus with complex pilot filter 2 2002
7,336,954 Method and apparatus for soft handoff between base stations using different frame formats 7 2002
7,881,256 Mobile station supervision of the forward dedicated control channel when in the discontinuous transmission mode 1 2002
6,853,843 Method of handoff within a telecommunications system containing digital base stations with different spectral capabilities 2 2002
7,185,362 Method and apparatus for security in a data processing system 28 2002
7,286,506 Method and apparatus for pilot estimation using a prediction error method with a kalman filter and a Gauss-Newton algorithm 2 2002
6,744,749 Method and apparatus for pilot estimation using a wiener filter 1 2002
6,618,429 System and method for generating signal waveforms in a CDMA cellular telephone system 12 2002
6,842,477 High-data-rate supplemental channel for CDMA telecommunications system 3 2002
8,085,865 Method and apparatus for providing high speed data communications in a cellular environment 1 2002
7,042,928 Method and apparatus for pilot estimation using prediction error method 1 2002
RE39177 Method and apparatus for performing soft hand-off in a wireless communication system 7 2002
7,590,408 Systems and methods for early determination of network support for mobile IP 2 2002
7,079,550 Method and apparatus for high rate packet data transmission 26 2002
6,771,620 Transmit gating in a wireless communication system 8 2003
6,728,230 Receiver method and apparatus with complex pilot filter 3 2003
7,236,796 Method and apparatus for reducing pilot search times utilizing mobile station location information 10 2003
7,272,176 Communication receiver with an adaptive equalizer 4 2003
7,257,377 Systems and methods for improving channel estimation 3 2003
7,085,317 Communication receiver with an adaptive equalizer length 4 2003
7,573,853 Method and system for controlling transmission energy in a variable rate gated communication system 0 2003
7,136,648 Candidate system search and soft handoff between frequencies in a multi-carrier mobile communication system 1 2003
8,068,453 Method and apparatus for predicting favored supplemental channel transmission slots using transmission power measurements of a fundamental channel 2 2003
8,098,818 Secure registration for a multicast-broadcast-multimedia system (MBMS) 1 2003
7,477,677 Method and apparatus for multipath demodulation in a code division multiple access communication system 1 2003
7,088,957 Method and apparatus for determining the closed loop power control set point in a wireless packet data communication system 4 2003
7,899,008 Method and apparatus for scheduling packet data transmission in a wireless communication system 0 2003
7,496,073 Method and apparatus for performing idle handoff in a multiple access communication system 1 2003
8,427,936 Multiple-access hybrid OFDM-CDMA system 0 2003
7,796,563 Method and system for selecting a best serving sector in a CDMA data communication system 0 2003
7,127,654 Method and an apparatus for a quick retransmission of signals in a communication system 8 2003
7,715,461 High data rate CDMA wireless communication system using variable sized channel codes 5 2004
7,626,922 Method and apparatus for a dedicated control channel in an early soft handoff in a code division multiple access communication system 0 2004
7,003,021 System and method for generating signal waveforms in a CDMA cellular telephone system 10 2004
7,417,957 Method and apparatus for a rate control in a high data rate communication system 0 2004
7,184,426 Method and apparatus for burst pilot for a time division multiplex system 12 2004
7,440,431 Method and apparatus for adaptive rate selection in a communication system 7 2004
7,680,174 Method and apparatus for forward link power control 1 2004
7,508,790 Configuration of overhead channels in a mixed bandwidth system 3 2004
7,486,653 Configuration of overhead channels in a mixed bandwidth system 0 2004
7,447,189 Configuration of overhead channels in a mixed bandwidth system 3 2004
8,000,284 Cooperative autonomous and scheduled resource allocation for a distributed communication system 5 2004
7,933,235 Multiflow reverse link MAC for a communications system 1 2004
7,463,631 Method and apparatus for scheduling packet data transmissions in a wireless communication system 9 2004
7,292,611 Demultiplexer for channel interleaving 0 2004
7,940,832 Method and apparatus for efficient Walsh covering and summing of signals in a communication system 0 2004
8,285,318 Method and apparatus for controlling transmission power while in soft handoff 0 2004
7,151,933 Method of handoff within a telecommunications system containing digital base stations with different spectral capabilities 1 2004
7,424,301 Method and apparatus for quick paging in a wireless communication system 1 2004
7,551,637 Method and apparatus for channel sensitive scheduling in a communication system 5 2005
7,822,041 Method and apparatus for scheduling packet data transmissions in a wireless communication system 0 2005
7,382,744 Systems and methods for optimizing the allocation of resources to serve different types of data flows in a wireless communication system 3 2005
7,831,272 Method and apparatus for performing fast power control in a mobile communication system 0 2005
8,229,366 Tunable duplexer with common node notch filter 0 2005
7,428,421 Method and apparatus for congestion control in a wireless communication system 1 2005
7,623,880 Method, apparatus and system for redistribution of mobile stations to different channels 3 2005
7,839,960 System and method for generating signal waveforms in a CDMA cellular telephone system 0 2005
7,986,749 Method and apparatus for performing fast power control in a mobile communication system 0 2005
7,664,209 Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system 0 2006
7,519,027 Method and apparatus for performing idle handoff in a multiple access communication system 2 2006
7,689,227 Method and apparatus for hashing over multiple frequency bands in a communication system 2 2006
7,751,370 Method and apparatus for forward link rate scheduling 3 2006
7,675,961 Method and apparatus for transmitting and receiving high speed data using code division multiple access channels 1 2006
7,680,084 Method and apparatus for providing orthogonal spot beams, sectors, and picocells 0 2006
7,835,695 Method and apparatus for determining the closed loop power control set point in a wireless packet data communication system 0 2006
7,751,371 Method and apparatus for providing variable rate data in a communications system using non-orthogonal overflow channels 0 2006
7,764,594 Multiple-access hybrid OFDM-CDMA system 4 2006
8,311,027 Method and apparatus for high rate packet data transmission 0 2006
7,613,978 Method and an apparatus for a quick retransmission of signals in a communication system 1 2006
8,351,372 Method and apparatus for high rate packet data transmission 0 2006
8,089,924 Method and apparatus for high rate packet data transmission 2 2006
8,077,655 Method and apparatus for high rate packet data transmission 2 2006
8,009,625 Method and apparatus for high rate packet data transmission 2 2006
7,995,531 Method and apparatus for high rate packet data transmission 2 2006
7,848,282 Method and apparatus for high rate packet data transmission 4 2006
7,848,283 Method and apparatus for high rate packet data transmission 2 2006
7,848,284 Method and apparatus for high rate packet data transmission 2 2006
8,005,042 Method and apparatus for high rate packet data transmission 2 2006
7,848,285 Method and apparatus for high rate packet data transmission 2 2006
7,499,427 Method and apparatus for high rate packet data transmission 5 2006
8,244,256 Method and apparatus in a CDMA communication system 1 2006
8,238,855 Candidate system search and soft handoff between frequencies in a multi-carrier mobile communication system 0 2006
8,199,716 Method and system for performing handoff in wireless communication systems 0 2006
8,050,361 Method and apparatus for coding in a telecommunications system 0 2006
7,373,149 Method of handoff within a telecommunications system containing digital base stations with different spectral capabilities 2 2006
7,580,709 Method and apparatus for performing handoff in communications systems 1 2007
7,492,754 Method and apparatus in a CDMA communication system 1 2007
7,653,157 Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system 1 2007
8,135,351 Systems and methods for improving channel estimation 0 2007
7,603,123 Method and system for performing a handoff in a wireless communication system, such as a hard handoff 3 2007
8,422,544 Communication receiver with an adaptive equalizer 0 2007
8,406,802 Methods and apparatuses for fast power control of signals transmitted on a multiple access channel 0 2007
7,929,473 Method and apparatus for reducing interference in a wireless communication system 2 2007
8,184,611 Mobile station assisted timing synchronization in a CDMA communication system 0 2007
8,009,588 System and method for transparent mobile IP registration within PPP negotiation 0 2008
8,428,593 Method and apparatus for soft handoff between base stations using different frame formats 0 2008
8,032,172 Method and apparatus for forward link gain control in a power controlled repeater 1 2008
7,809,044 Method and apparatus for forward link power control 0 2008
8,095,142 Configuration of overhead channels in a mixed bandwidth system 0 2008
8,345,728 Method and apparatus for transmitting and receiving high speed data using code division multiple access channels 0 2009
8,040,936 Method and apparatus for transmitting and receiving high speed data using code division multiple access channels 1 2009
8,010,113 Method and apparatus for performing handoff in communication systems 0 2009
8,189,540 Method and apparatus for high rate packet data transmission 0 2009
8,170,558 Method and system for performing a handoff in a wireless communication system, such as a hard handoff 0 2009
8,428,594 Methods and apparatus of improving inter-sector and/or inter cell handoffs in a multi-carrier wireless communications system 0 2010
8,095,144 Method and apparatus for hashing over multiple frequency bands in a communication system 0 2010
8,213,485 High rate CDMA wireless communication system using variable sized channel codes 0 2010
8,396,033 Method and apparatus for forward link rate scheduling 0 2010
8,433,340 Method and apparatus in a CDMA communication system 0 2012
 
INTEL CORPORATION (76)
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5,396,515 Asymmetric spread spectrum correlator 48 1991
5,285,469 Spread spectrum wireless telephone system 115 1991
5,291,516 Dual mode transmitter and receiver 146 1992
5,276,704 SAWC phase detection method and apparatus 42 1992
5,355,389 Reciprocal mode saw correlator method and apparatus 10 1993
5,497,424 Spread spectrum wireless telephone system 80 1994
5,499,265 Spread spectrum correlator 18 1994
5,535,238 Spread spectrum adaptive power control communications system and method 36 1994
6,088,590 Method and system for mobile controlled handoff and link maintenance in spread spectrum communication 29 1994
5,887,020 Multi-band, multi-mode spread-spectrum communication system 87 1994
5,614,914 Wireless telephone distribution system with time and space diversity transmission for determining receiver location 128 1994
5,648,982 Spread spectrum transmitter 42 1994
5,574,747 Spread spectrum adaptive power control system and method 42 1995
5,640,674 Three-cell wireless communication system 6 1995
5,673,286 Spread spectrum multipath processor system and method 61 1995
5,563,907 Variable bandwith spread spectrum device and method 14 1995
5,959,980 Timing adjustment control for efficient time division duplex communication 51 1995
5,689,502 Efficient frequency division duplex communication system with interleaved format and timing adjustment control 116 1995
5,832,028 Method and apparatus for coherent serial correlation of a spread spectrum signal 4 1995
5,818,820 Method and system for data link expansion or contraction using spread spectrum TDMA communication 115 1995
5,796,772 Multi-band, multi-mode spread-spectrum communication system 58 1995
5,790,587 Multi-band, multi-mode spread-spectrum communication system 119 1995
5,768,264 Time division multiple access base station supporting ISDN messages 10 1995
5,754,584 Non-coherent spread-spectrum continuous-phase modulation communication system 12 1995
5,754,585 Method and apparatus for serial noncoherent correlation of a spread spectrum signal 5 1995
5,694,414 Multi-band, multi-mode spread-spectrum communication system 21 1995
5,692,007 Method and apparatus for differential phase encoding and decoding in spread-spectrum communication systems with continuous-phase modulation 12 1995
5,671,219 Communication protocol for spread spectrum communication 43 1995
5,648,955 Method for power control in a TDMA spread spectrum communication system 101 1995
5,629,956 Method and apparatus for reception and noncoherent serial correlation of a continuous phase modulated signal 12 1995
5,627,856 Method and apparatus for receiving and despreading a continuous phase-modulated spread spectrum signal using self-synchronizing correlators 17 1995
5,610,940 Method and apparatus for noncoherent reception and correlation of a continous phase modulated signal 46 1995
6,366,568 Transfer station for wireless telephone distribution system with time and space diversity transmission 63 1995
5,859,842 Antenna diversity techniques 24 1995
5,815,525 Multi-band, multi-mode spread-spectrum communication system 161 1996
6,161,013 Wireless communication system and method 63 1996
5,991,625 Spread spectrum wireless telephone system 17 1996
5,835,527 Spread spectrum adaptive power control system and method 18 1996
5,856,998 Method and apparatus for correlating a continuous phase modulated spread spectrum signal 8 1996
6,112,080 Wireless communication method and system 131 1996
6,094,421 Timing adjustment control for efficient time division duplex, frequency division duplex or hybrid time division duplex/frequency division duplex communication 127 1997
5,787,076 Multi-mode TDMA spread spectrum communication system 28 1997
5,742,638 Spread-spectrum data publishing system 5 1997
5,920,590 Variable bandwidth spread spectrum device 8 1997
5,995,538 Spread spectrum multipath processor system and method 22 1997
6,115,412 Spread spectrum wireless telephone system 6 1997
5,881,100 Method and apparatus for coherent correlation of a spread spectrum signal 12 1997
6,118,824 Spread-spectrum data publishing system 39 1998
6,983,150 Wireless cellular communication system 2 1998
6,421,368 Spread spectrum wireless communication system 1 1999
6,175,586 Adjusting a transmitter power level for a spread spectrum transmitter 40 1999
6,388,997 Timing adjustment control for efficient time division duplex communication 66 2000
6,330,272 Receiving a spread spectrum data signal using determined weights 3 2000
7,411,936 Wireless communication method and apparatus 0 2000
6,611,548 Multipath processor 8 2001
6,621,852 Spread spectrum wireless communication system 1 2001
6,842,444 Wireless telephone system with diversity transmission and method 19 2002
6,721,350 Spread spectrum adaptive power control using a base station 4 2002
6,671,308 Spread spectrum adaptive power control 4 2002
7,554,964 Wireless telephone system with diversity transmission and method 8 2002
7,463,608 Transmitting station for wireless telephone system with diversity transmission and method 8 2002
6,804,207 Transmitting station for wireless telephone system with diversity transmission and method 7 2002
6,785,251 Receiving station for wireless telephone system with diversity transmission and method 11 2002
6,778,515 Receiving station for wireless telephone system with diversity transmission and method 11 2002
6,947,469 Method and Apparatus for wireless spread spectrum communication with preamble processing period 5 2002
7,120,187 Spread spectrum wireless communication system 0 2003
8,248,988 Locating a wireless user 0 2003
7,697,643 Setting a transmission power level for a mobile unit 0 2004
8,228,886 Code transmission over timeslots and antennas 0 2005
8,130,696 Transmitting an information signal over antennas 0 2005
7,660,289 System, apparatus and method of varying channel bandwidth 0 2005
8,432,867 Method and apparatus for receiving code transmissions over timeslots and antennas 0 2008
8,155,017 Method and apparatus for locating a wireless user 0 2008
7,961,822 Setting a transmission power level for a mobile unit 0 2010
8,340,228 Setting a transmission power level for a mobile unit 0 2011
 
KINETO WIRELESS, INC. (66)
7,996,009 Method for authenticating access to an unlicensed wireless communications system using a licensed wireless communications system authentication process 0 2002
7,890,099 Method for automatic and seamless call transfers between a licensed wireless system and an unlicensed wireless system 0 2002
6,922,559 Unlicensed wireless communications base station to facilitate unlicensed and licensed wireless communications with a subscriber device, and method of operation 74 2002
6,647,426 Apparatus and method for integrating an unlicensed wireless communications system and a licensed wireless communications system 109 2002
7,308,263 Apparatus for supporting the handover of a telecommunication session between a licensed wireless system and an unlicensed wireless system 50 2002
7,127,250 Apparatus and method for extending the coverage area of a licensed wireless communication system using an unlicensed wireless communication system 60 2003
7,634,269 Apparatus and method for extending the coverage area of a licensed wireless communication system using an unlicensed wireless communication system 9 2004
7,640,008 Apparatus and method for extending the coverage area of a licensed wireless communication system using an unlicensed wireless communication system 14 2004
7,933,598 Methods and apparatuses for effecting handover in integrated wireless systems 2 2005
7,756,546 Methods and apparatuses to indicate fixed terminal capabilities 0 2005
7,873,015 Method and system for registering an unlicensed mobile access subscriber with a network controller 2 2005
7,369,859 Method and system for determining the location of an unlicensed mobile access subscriber 42 2005
8,041,385 Power management mechanism for unlicensed wireless communication systems 0 2005
7,957,348 Method and system for signaling traffic and media types within a communications network switching system 3 2005
7,953,423 Messaging in an unlicensed mobile access telecommunications system 6 2005
7,606,190 Apparatus and messages for interworking between unlicensed access network and GPRS network for data services 18 2005
7,565,145 Handover messaging in an unlicensed mobile access telecommunications system 13 2005
7,471,655 Channel activation messaging in an unlicensed mobile access telecommunications system 28 2005
7,349,698 Registration messaging in an unlicensed mobile access telecommunications system 37 2005
7,843,900 Mechanisms to extend UMA or GAN to inter-work with UMTS core network 5 2005
7,515,575 Intelligent access point scanning with self-learning capability 5 2005
7,283,821 Radio resources messaging for a mobile station in an unlicensed wireless communication system 27 2005
7,245,916 Radio resources messaging in an unlicensed wireless communication system 31 2005
7,215,961 Registration messaging for a mobile station in an unlicensed wireless communication system 29 2005
7,209,744 Registration messaging for an unlicensed wireless communication system 29 2005
7,606,568 Messaging for registration in an unlicensed wireless communication system 10 2005
7,369,854 Release of radio resources in an unlicensed wireless communication system 31 2005
7,324,818 Mobile station implementation for switching between licensed and unlicensed wireless systems 26 2005
7,200,399 Ciphering configuration procedure in an unlicensed wireless communication system 25 2005
7,197,309 Mobile station ciphering configuration procedure in an unlicensed wireless communication system 24 2005
7,171,205 Architecture of an unlicensed wireless communication system with a generic access point 27 2005
7,107,055 Mobile station GPRS implementation for switching between licensed and unlicensed wireless systems 29 2005
7,634,270 GPRS data protocol architecture for an unlicensed wireless communication system 2 2005
7,634,271 GSM signaling protocol architecture for an unlicensed wireless communication system 1 2005
7,212,819 GPRS signaling protocol architecture for an unlicensed wireless communication system 23 2005
7,283,822 Service access control interface for an unlicensed wireless communication system 33 2006
7,272,397 Service access control interface for an unlicensed wireless communication system 35 2006
7,720,481 Apparatus for supporting the handover of a telecommunication session between a licensed wireless system and an unlicensed wireless system 2 2007
7,885,644 Method and system of providing landline equivalent location information over an integrated communication system 12 2007
8,165,086 Method of providing improved integrated communication system data service 0 2007
7,912,004 Generic access to the Iu interface 4 2007
7,852,817 Generic access to the Iu interface 7 2007
7,454,207 Service access control interface for an unlicensed wireless communication system 17 2007
8,204,502 Method and apparatus for user equipment registration 2 2007
8,073,428 Method and apparatus for securing communication between an access point and a network controller 1 2007
8,036,664 Method and apparatus for determining rove-out 2 2007
7,995,994 Method and apparatus for preventing theft of service in a communication system 17 2007
8,150,397 Method and apparatus for establishing transport channels for a femtocell 1 2007
8,005,076 Method and apparatus for activating transport channels in a packet switched communication system 5 2007
7,929,977 Method and system for determining the location of an unlicensed mobile access subscriber 0 2007
7,974,624 Registration messaging in an unlicensed mobile access telecommunications system 1 2007
7,574,213 Apparatus for supporting the handover of a telecommunication session between a licensed wireless system and an unlicensed wireless system 9 2007
8,019,331 Femtocell integration into the macro network 2 2008
8,090,371 Network controller messaging for release in an unlicensed wireless communication system 1 2008
7,773,993 Network controller messaging for channel activation in an unlicensed wireless communication system 8 2008
7,668,558 Network controller messaging for paging in an unlicensed wireless communication system 0 2008
7,684,803 Network controller messaging for ciphering in an unlicensed wireless communication system 6 2008
7,949,326 Apparatus and method for extending the coverage area of a licensed wireless communication system using an unlicensed wireless communication system 1 2008
7,818,007 Mobile station messaging for ciphering in an unlicensed wireless communication system 2 2008
7,769,385 Mobile station messaging for registration in an unlicensed wireless communication system 8 2008
7,904,084 Intelligent access point scanning with self-learning capability 1 2009
8,041,335 Method and apparatus for routing of emergency services for unauthorized user equipment in a home Node B system 6 2009
8,165,585 Handover messaging in an unlicensed mobile access telecommunications system 0 2009
8,130,703 Apparatus and messages for interworking between unlicensed access network and GPRS network for data services 0 2009
8,160,588 Method and apparatus for supporting the handover of a telecommunication session between a licensed wireless system and an unlicensed wireless system 0 2010
8,045,493 Mechanisms to extend UMA or GAN to inter-work with UMTS core network 0 2010
 
INTERDIGITAL TECHNOLOGY CORPORATION (50)
5,299,226 Adaptive power control for a spread spectrum communications system and method 98 1991
5,345,467 CDMA cellular hand-off apparatus and method 107 1992
5,420,896 Synchronous spread-spectrum communications system and method 57 1993
5,422,908 Phased array spread spectrum system and method 32 1993
5,365,544 CDMA communications and geolocation system and method 105 1994
5,659,572 Phased array spread spectrum system and method 26 1994
5,610,906 Spread-spectrum changeable base station 7 1994
5,459,759 Frequency hopping code division multiple access system and method 64 1994
5,506,864 CDMA communications and geolocation system and method 106 1994
5,631,921 Adaptive power control for a spread spectrum communications system and method 40 1995
5,657,343 Frequency hopping code division multiple access system and method 49 1995
5,633,889 Phased array spread spectrum system and method 26 1996
5,663,956 CDMA communications and geolocation system and method 19 1996
5,677,778 Optical interconnect for high speed processors 23 1996
5,926,465 Spread-spectrum changeable base station 13 1997
5,881,094 Frequency hopping code division multiple access system and method 29 1997
5,926,502 Phased array spread spectrum system and method 10 1997
5,974,039 CDMA communications and geolocation system and method 33 1997
6,008,918 Optical interconnect for high speed processor 12 1997
6,295,288 Spread-spectrum changeable base station 2 1998
6,226,316 Spread spectrum adaptive power control communications system and method 29 1998
6,128,328 Frequency hopping code division multiple access system and method 13 1999
6,256,340 Phased array spread spectrum system and method5 10 1999
6,396,824 CDMA communications and geolocation system and method 1 1999
6,243,180 Optical interconnect for high speed processors 6 1999
6,327,297 Frequency hopping code division multiple access system and method 5 2000
7,072,380 Apparatus for initial power control for spread-spectrum communications 23 2000
6,400,756 Phased array spread spectrum receiver 2 2001
7,929,498 Adaptive forward power control and adaptive reverse power control for spread-spectrum communications 21 2001
6,873,643 Spread spectrum adaptive power control communications system and method 3 2001
6,373,605 Optical interconnect for high speed processor 3 2001
6,507,600 Frequency hopping code division multiple access system and method 0 2001
7,054,278 Spread-spectrum changeable base station 1 2001
7,099,292 Spread spectrum communications using a reference and a message signal system and method 2 2002
7,020,114 Spread spectrum communication system and method using a reference signal and a plurality of message signals 2 2002
6,925,071 Spread spectrum base station 2 2002
6,917,601 Spread spectrum remote unit 0 2002
7,502,406 Automatic power control system for a code division multiple access (CDMA) communications system 6 2002
6,563,860 Base station having a set of phased array antennas 4 2002
6,563,617 Optical apparatus using a 2D-spatial light modulator 7 2002
7,142,582 Receiving and selectively transmitting frequency hopped data signals using a plurality of antennas 2 2002
6,711,358 Optical apparatus using a phase grating 1 2003
7,362,793 Base station having a set of phased array antennas 0 2003
7,756,190 Transferring voice and non-voice data 1 2003
7,068,934 Optical interconnect 0 2004
7,903,613 Code division multiple access (CDMA) communication system 2 2004
7,535,874 Method and apparatus for adaptive power control for spread-spectrum communications 11 2004
7,706,332 Method and subscriber unit for performing power control 5 2005
7,564,808 Spread spectrum communication unit 0 2006
7,580,475 Base station having a set of phased array antennas 0 2008
 
MOTOROLA MOBILITY LLC (22)
5,329,547 Method and apparatus for coherent communication in a spread-spectrum communication system 136 1993
5,471,670 Method for determining communciation resource handoffs 39 1993
5,390,166 Method for recovering a data signal using diversity in a radio frequency, time division multiple access communication system 60 1993
5,412,686 Method and apparatus for power estimation in a communication system 48 1993
5,530,716 Method and apparatus for identifying a coded communication signal 24 1994
5,506,867 Cellular radio system using common radio backbone 17 1994
5,668,836 Split frequency band signal digitizer and method 123 1994
5,579,341 Multi-channel digital transceiver and method 136 1994
5,682,416 Method and apparatus communication handover in a communication system 30 1995
5,790,954 Methods of requesting volunteers for handoff in a cellular system 13 1995
5,748,683 Multi-channel transceiver having an adaptive antenna array and method 120 1995
5,754,597 Method and apparatus for routing a digitized RF signal to a plurality of paths 4 1996
6,449,305 Method and apparatus for performing handoff in a spread-spectrum communication system 14 1996
6,167,099 Multi-channel digital transceiver and method 53 1996
5,818,883 Multi-channel digital transceiver and method 15 1996
5,889,768 Method of and apparatus for pilot channel acquisition 49 1996
6,160,799 Method of and apparatus for pilot set maintenance 13 1996
5,987,012 Method of handing off and a wireless communication device 37 1996
5,920,549 Method of handing off and a wireless communication device 56 1996
5,854,785 System method and wireless communication device for soft handoff 28 1996
5,812,605 Multi-channel digital transceiver and method 13 1997
6,917,809 Method for automatically sorting the neighbor list of a cell in a communications system 4 2001
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (22)
5,295,152 TDMA for mobile access in a CDMA system 107 1992
5,295,153 CDMA frequency allocation 81 1992
5,327,577 Handover method for mobile radio system 64 1993
RE36017 Cellular digital mobile radio system and method of transmitting information in a digital cellular mobile radio system 2 1993
5,341,397 CDMA frequency allocation 65 1993
5,499,387 Handoff method wherein stored measured information is transferred between base stations 22 1994
5,701,585 Mobile assisted handoff 42 1994
7,212,820 Mobile assisted handover using CDMA 8 1995
5,533,014 Non-continuous transmission for seamless handover in DS-CDMA systems 73 1995
5,577,047 System and method for providing macrodiversity TDMA radio communications 27 1995
5,896,368 Multi-code compressed mode DS-CDMA systems and methods 87 1996
5,883,899 Code-rate increased compressed mode DS-CDMA systems and methods 73 1996
6,078,817 System and method of dynamically increasing the capacity of a code division multiple access radio telecommunications network 33 1997
5,933,777 System and method for allocating channel elements in a code division multiple access radio telecommunications network 46 1997
RE36078 Handover method for mobile radio system 11 1997
RE36079 Handover method for mobile radio system 1 1997
6,246,878 Magnetoresistive device having a highly smooth metal reflective layer 19 1997
6,895,245 Telecommunications interexchange measurement transfer 13 1998
6,330,271 CDMA receiver that shares a tracking device among multiple rake branches 16 1998
RE37685 Handover method for mobile radio system 1 1999
RE37787 Handover method for mobile radio system 2 1999
7,248,874 Mobile assisted handover using CDMA 0 2003
 
NEC CORPORATION (15)
5,454,026 Mobile communication congestion control system 46 1993
5,420,863 Mobile communication system with cell-site switching for intra-cell handoff 36 1993
5,842,128 Mobile communication system wherein a base station transfers to another an identifier for a cell of call origination only upon call termination 13 1995
5,844,898 Method of radio channel switching over in a mobile radio communications system 5 1996
5,987,013 Handoff control with a pilot used in a cell of a neighboring cell in a CDMA mobile communication network on a service frequency of the neighboring cell 19 1997
6,111,864 Hand-off method and apparatus in CDMA cellular system 24 1997
6,418,320 Mobile station and a method of reducing interference among radio channels in the mobile station 23 1998
6,351,651 Method of controlling transmission power in a cellular type mobile communication system 30 1999
6,535,494 CDMA mobile telecommunication method and system 2 1999
6,405,021 Method of controlling transmission power in cellular system and base station apparatus 19 1999
6,901,257 Mobile communication system for performing hand-off control based on channel station data 4 2001
6,731,949 Method of controlling transmission power in a cellular type mobile communication system 11 2001
RE39735 Cellular communication system, and mobile and base stations used in the same 0 2002
7,852,808 Mobile communication system, radio switching method, mobile base station and mobile terminal 0 2003
RE41891 Cellular communication system, and mobile and base stations used in the same 0 2004
 
MOTOROLA, INC. (13)
5,210,771 Multiple user spread-spectrum communication system 122 1991
5,159,608 Method and apparatus for using orthogonal coding in a communication system 71 1991
5,245,629 Method for compensating for capacity overload in a spread spectrum communication system 129 1991
5,204,874 Method and apparatus for using orthogonal coding in a communication system 121 1992
5,311,176 Method and apparatus for generating Walsh codes 30 1992
5,325,394 Method and apparatus for canceling spread-spectrum noise 95 1993
5,345,596 Method and apparatus for establishing a communication link 52 1993
5,471,644 Method of reducing audio gap in downlink during handoff of cellular radiotelphone 19 1993
5,406,629 Apparatus and method for digitally processing signals in a radio frequency communication system 22 1993
5,602,874 Method and apparatus for reducing quantization noise 2 1995
5,710,763 Filtered fast Fourier transmultiplexer and method 5 1995
RE39980 Calling channel in CDMA communications system 1 1996
5,854,813 Multiple access up converter/modulator and method 10 1997
 
AT&T MOBILITY II LLC (10)
7,046,737 Near-optimal low-complexity decoding of space-time codes for wireless applications 4 2004
7,120,200 Transmitter diversity technique for wireless communications 11 2004
7,643,568 Low complexity maximum likelihood detection of concatenated space codes for wireless applications 4 2004
7,526,040 Near-optimal low-complexity decoding of space-time codes for fixed wireless applications 1 2006
7,386,077 Receiver diversity technique for wireless communications 5 2006
7,916,806 Transmitter diversity technique for wireless communications 3 2007
7,587,007 Transmitter diversity technique for wireless communications 4 2007
7,609,771 Maximum ratio transmission 1 2008
8,179,991 Near-optimal low-complexity decoding of space-time codes for fixed wireless applications 0 2009
8,351,545 Low complexity maximum likelihood detection of concatenated space codes for wireless applications 0 2009
 
CELLCO PARTNERSHIP D/B/A VERIZON WIRELESS (10)
5,504,936 Microcells for digital cellular telephone systems 45 1994
5,479,397 CDMA transmission delay method and apparatus 38 1994
6,035,197 Method and system for providing a handoff from a CDMA cellular telephone system 29 1994
5,678,186 Digital microcells for cellular networks 15 1996
5,758,287 Hub and remote cellular telephone system 35 1996
5,983,118 Antenna system for a cellular telephone network 9 1997
6,198,925 Method and apparatus for intelligent microcell and antenna selection in digital cellular telephone systems 15 1997
6,240,292 Method and system for providing a handoff from a CDMA cellular telephone system 19 1999
6,748,216 Method and apparatus for intelligent microcell and antenna selection in digital cellular telephone systems 4 2000
6,434,406 Antenna system for a cellular telephone network 4 2000
 
NTT DOCOMO, INC. (9)
5,953,324 CDMA mobile communication method, system and mobile station apparatus 15 1997
8,275,133 Method and system for mobile communications 0 2006
7,664,507 Method and system for mobile communications 2 2006
7,630,716 Method and system for mobile communications 11 2007
7,792,531 Method and system for mobile communications 0 2007
7,953,414 Method and system for mobile communications 1 2009
8,331,935 Method and system for mobile communications 0 2009
8,259,675 Method and system for mobile communications 0 2009
7,907,730 Method and system for mobile communications 0 2009
 
FUJITSU LIMITED (8)
6,108,548 Mobile station and soft handoff method 25 1997
6,259,723 Data communication system 30 1998
6,205,335 Zone selection method for mobile radio communication system 14 1998
6,889,046 Soft hand-off in cellular mobile communications networks 2 2002
7,684,369 Radio based station apparatus and base station controller 2 2004
7,236,788 Soft hand-off in cellular mobile communications networks 5 2004
7,924,790 Radio base station apparatus and base station controller 0 2010
8,189,513 Radio base station apparatus and base station controller 0 2011
 
NTT MOBILE COMMUNICATIONS NETWORK INC. (7)
5,487,083 Hand-off method and mobile station for spread spectrum mobile communication 34 1994
5,732,327 Method for automatic creation of peripheral zone information 9 1995
5,878,350 Scheme for controlling transmission powers during soft handover in a CDMA mobile communication system 39 1997
7,236,787 Method and system for mobile communications 39 1998
7,383,045 Method and system for mobile communications 9 2006
7,577,435 Method and system for mobile communications 1 2006
8,185,158 Method and system for mobile communications 15 2009
 
SAMSUNG ELECTRONICS CO., LTD. (7)
6,128,493 Hard handoff system for a mobile phone and method therefor 15 1997
6,304,562 Asymmetric forward power control in a CDMA communication 30 1998
6,633,554 System and method for soft handoff setup during system access idle handoff in a wireless network 50 1998
6,707,803 Device and method for performing inter-MSC soft handoff using router in CDMA communication system 7 2000
7,397,777 Handoff control method and a mobile station employing the same 4 2000
7,277,407 Apparatus and method for controlling transmit antenna array for physical downlink shared channel in a mobile communication system 8 2001
7,480,509 Handover system and method for minimizing service delay due to pingpong effect in a broadband wireless access communication system 1 2005
 
AT&T WIRELESS SERVICES, INC. (6)
6,185,258 Transmitter diversity technique for wireless communications 162 1998
6,775,329 Transmitter diversity technique for wireless communications 36 2000
6,807,240 Low complexity maximum likelihood detection of concatenate space codes for wireless applications 21 2001
6,741,635 Near-optimal low-complexity decoding of space-time codes for fixed wireless applications 25 2002
6,853,688 Low complexity maximum likelihood detection of concatenated space codes for wireless applications 15 2002
8,355,475 Diversity technique for wireless communications 0 2011
 
LUCENT TECHNOLOGIES INC. (6)
5,697,053 Method of power control and cell site selection 46 1994
5,913,166 Arrangement for providing a call hand-off for a mobile station from a land-line supported private base station to a cellular base station operating in a cellular system 61 1995
5,794,149 Base station controlled handoff method and apparatus 69 1995
6,097,954 Method for performing a soft handoff 28 1997
6,560,210 Handing off a wireless terminal in a wireless telecommunications system 3 1998
6,873,845 Method of power control and cell site selection based upon path gain and interference level 2 2002
 
XIRCOM WIRELESS, INC. (6)
5,802,046 Efficient time division duplex communication system with interleaved format and timing adjustment control 88 1995
5,745,484 Efficient communication system using time division multiplexing and timing adjustment control 116 1995
5,680,414 Synchronization apparatus and method for spread spectrum receiver 37 1995
5,659,574 Multi-bit correlation of continuous phase modulated signals 19 1995
6,522,642 Antenna diversity techniques 23 1998
6,366,566 Efficient communication system using time division multiplexing and timing adjustment control 16 1999
 
RESEARCH IN MOTION LIMITED (5)
5,771,452 System and method for providing cellular communication services using a transcoder 10 1995
6,621,850 Block detection receiver 1 1998
6,526,103 Multi-stage receiver 7 1998
6,587,517 Multi-stage receiver 4 1999
6,668,011 Block detection receiver 7 1999
 
TEXAS INSTRUMENTS INCORPORATED (5)
6,771,691 System and method for extracting soft symbols in direct sequence spread spectrum communications 0 2000
6,831,956 Wireless communications system with combining of multiple paths selected from sub-windows in response to the primary synchronization channel 7 2000
6,829,290 Wireless communications system with combining of multiple paths selected from correlation to the primary synchronization channel 9 2000
7,031,374 System and method for selecting sample streams in direct sequence spread spectrum communications 3 2000
6,987,799 System and method for demodulating associated information channels in direct sequence spread spectrum communications 0 2001
 
XIRCOM II WIRELESS, INC. (5)
6,094,575 Communication system and method 91 1996
5,737,324 Method and apparatus for establishing spread spectrum communication 4 1996
5,850,600 Three cell wireless communication system 2 1997
5,953,370 Apparatus for receiving and correlating a spread spectrum signal 13 1997
6,532,365 PCS pocket phone/microcell communication over-air protocol 28 2000
 
CELL-LOC LOCATION TECHNOLOGIES INC. (4)
6,330,452 Network-based wireless location system to position AMPs (FDMA) cellular telephones, part I 86 1998
6,266,014 Methods and apparatus to position a mobile receiver using downlink signals part IV 44 1998
6,208,297 Methods and apparatus to position a mobile receiver using downlink signals, part I 30 1998
6,204,812 Methods and apparatus to position a mobile receiver using downlink signals, part II 31 1998
 
CISCO TECHNOLOGY, INC. (4)
6,215,982 Wireless communication method and device with auxiliary receiver for selecting different channels 35 1996
6,047,175 Wireless communication method and device with auxiliary receiver for selecting different channels 69 1996
7,003,298 Devices, softwares and methods for handing off live calls between legs of CSV and VOX modalities 9 2002
7,299,049 Devices, softwares and methods for handling off live calls between legs of CSV and VoX modalities 6 2005
 
GOOGLE INC. (4)
5,864,578 Matched filter-based handoff method and apparatus 33 1996
6,215,811 Store and dump, spread-spectrum handoff 23 1998
6,324,207 Handoff with closed-loop power control 18 1999
7,020,184 Store and forward handoff 2 2001
 
MOTOROLA MOBILITY, INC. (4)
5,216,692 Method and apparatus for adjusting a power control threshold in a communication system 98 1992
5,297,161 Method and apparatus for power estimation in an orthogonal coded communication system 50 1992
5,224,122 Method and apparatus for canceling spread-spectrum noise 104 1992
5,442,681 Method of exchanging communicated signals between a remote base site and a central site in a communication system 16 1993
 
NOKIA CORPORATION (4)
7,903,610 Reverse link handoff mechanism with hybrid ARQ and cell site selection 0 2002
7,848,290 Method and system for forward link cell switching approach without abis traffic flooding 0 2002
8,019,344 Apparatus, and associated methods, for facilitating secure, make-before-break hand-off in a radio communication system 1 2005
7,729,702 Method and apparatus for combining macrodiversity spread code signals 1 2008
 
XIRCOM, INC. (4)
6,229,792 Spread spectrum communication system 41 1995
6,275,704 Multiple access communication system with polarized antennas 11 1997
6,282,228 Spread spectrum codes for use in communication 17 1997
6,317,452 Method and apparatus for wireless spread spectrum communication with preamble sounding gap 38 1999
 
APPLE INC. (3)
5,884,177 Cellular communication system and method providing improved handoff capability 16 1995
6,704,299 Efficient frame quality indicator for a wireless signal decoder 5 1999
7,936,720 Active set management enhancement for reliable soft handoff in 1xEV-DO system 0 2006
 
ERICSSON GE MOBILE COMMUNICATIONS HOLDING INC. (3)
5,187,675 Maximum search circuit 37 1991
5,237,586 Rake receiver with selective ray combining 179 1992
5,345,598 Duplex power control system in a communication network 124 1992
 
ERICSSON GE MOBILE COMMUNICATIONS INC. (3)
5,353,352 Multiple access coding for radio communications 138 1992
5,377,183 Calling channel in CDMA communications system 121 1994
5,550,809 Multiple access coding using bent sequences for mobile radio communications 70 1994
 
ERICSSON INC. (3)
5,742,678 Multiple access coding for radio communications 23 1996
5,771,288 Multiple access coding for radio communications 29 1997
6,931,050 Digital receivers and receiving methods that scale for relative strengths of traffic and pilot channels during soft handoff 10 1998
 
LG ELECTRONICS INC. (3)
6,339,590 Method and system for providing inter-frequency handoff in a telephone system 12 1998
6,665,281 Method and system for providing inter-frequency handoff in a telephone system 8 1999
7,136,366 Method and system for providing inter-frequency handoff in a telephone system 1 2001
 
NOKIA MOBILE PHONES LTD. (3)
5,483,668 Method and apparatus providing handoff of a mobile station between base stations using parallel communication links established with different time slots 113 1993
5,940,743 Power control of mobile station transmissions during handoff in a cellular system 69 1997
7,133,434 Making measurements on parallel frequencies in a radio communications device 3 1998
 
UNWIRED PLANET, LLC (3)
5,883,888 Seamless soft handoff in a CDMA cellular communications system 51 1996
6,061,556 System and method for secondary traffic charging in a radio telecommunications network 16 1997
7,522,560 Method, system and equipment for retransmission in communications systems 2 2002
 
ALCATEL N.V. (2)
6,128,488 Non-geostationary satellite communication systems, and station and terminal thereof 8 1996
5,995,835 Method of handing over a call set up with a mobile station from one cell to another within a cellular radio network 8 1997
 
AVAYA INC. (2)
5,444,766 Mobile-synchronized handoff in a wireless communications system 17 1993
6,728,540 Assisted handover in a wireless communication system 13 1998
 
BROADCOM CORPORATION (2)
7,924,783 Hierarchical communications system 0 2000
8,295,775 Determining a handoff metric 0 2008
 
CDC PROPRIETE INTELLECTUELLE (2)
5,537,679 Communication network with flexible handoff scheduling for mobile nodes 31 1994
6,138,012 Method and apparatus for reducing signal blocking in a satellite communication system 64 1997
 
CINGULAR WIRELESS II, LLC (2)
7,274,752 Maximum ratio transmission 1 2004
7,362,823 Maximum ratio transmission 1 2007
 
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (2)
5,781,861 Method for shedding traffic load in code division multiple access mobile communication system 39 1996
6,175,736 Method and system for providing a power-efficient soft handoff in a multicarrier CDMA cellular system 11 1998
 
LITTLEFEET, INC. (2)
6,459,900 Methods of operating arrangements of base transceiver stations in an area-covering network 14 2000
RE37820 Arrangements of base transceiver stations of an area-covering network 13 2001
 
LOW ENVIRON AG, LLC (2)
5,530,737 Secure access telephone extension system and method 37 1993
5,852,785 Secure access telephone extension system and method in a cordless telephone system 4 1996
 
LSI LOGIC CORPORATION (2)
6,567,666 Forward link inter-generation soft handoff between 2G and 3G CDMA systems 31 1999
6,804,519 Forward link inter-generation soft handoff between 2G and 3G CDMA systems 8 2003
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (2)
5,644,621 Point to Multipoint radiotelephone system 16 1995
5,646,937 Code division multiple access communication system 10 1995
 
NOKIA TELECOMMUNICATIONS OY (2)
5,754,541 Data transmission method, base station, and subscriber terminal 36 1996
5,850,607 Method and apparatus for providing control handoff in a cellular telecommunications system 41 1996
 
NORTHROP GRUMMAN SYSTEMS CORPORATION (2)
5,649,308 Multiformat auto-handoff communications handset 59 1995
6,845,087 Wideband wireless communications architecture 2 1999
 
OMNIPOINT TECHNOLOGIES, INC. (2)
5,455,822 Method and apparatus for establishing spread spectrum communication 124 1993
5,757,847 Method and apparatus for decoding a phase encoded signal 12 1995
 
SIEMENS AKTIENGESELLSCHAFT (2)
6,198,737 Method for the transmission of information in a universal transmission network 0 1998
6,256,297 Method for transmitting information in a universal transmission network 4 1998
 
TRUEPOSITION, INC. (2)
5,327,144 Cellular telephone location system 474 1993
5,608,410 System for locating a source of bursty transmissions cross reference to related applications 160 1994
 
ADC TELECOMMUNICATIONS, INC. (1)
6,556,551 Multi-frequency pilot beacon for CDMA systems 27 1999
 
ALCATEL CIT (1)
5,289,525 Handover method for radiotelephone networks 15 1991
 
ALCATEL ESPACE (1)
5,995,807 Method of switching a channel from a first propagation path to a second propagation path 4 1997
 
AT&T IPM CORP. (1)
5,438,565 Packet switch to provide code division, multiple access cellular service 92 1993
 
BELL ATLANTIC MOBILE SYSTEMS LLC (1)
5,613,204 Beacon system for roaming cellular stations 78 1994
 
CAPITOL ENERGY RESOURCES INC. (1)
5,890,068 Wireless location system 188 1996
 
COMCAST MO GROUP, INC. (1)
5,295,180 Cellular telephone zone system 92 1992
 
CORE WIRELESS LICENSING S.A.R.L (1)
6,009,328 Inter-exchange soft handoff in a cellular telecommunications system 41 1996
 
DATANG TELECOM TECHNOLOGY & INDUSTRY HOLDINGS CA, LTD (1)
6,980,527 Smart antenna CDMA wireless communication system 19 2000
 
DENSO CORPORATION (1)
7,054,631 Enhancement of soft handoff in a mobile wireless network through the use of dynamic information feedback from mobile users 8 2001
 
DETECON DEUTSCHE TELEPOST CONSULTING GMBH (1)
6,085,092 Method for improving the radio cell illumination in a cellular mobile radio system and apparatus for carrying out the method 6 1997
 
DOT WIRELESS, INC. (1)
6,959,033 System and method for assigning combiner channels in spread spectrum communications 3 2000
 
ERICSSON AB (1)
6,330,232 Base station transceiver subsystem carrier selection at a CDMA cell site 6 1997
 
GEORGIA TECH RESEARCH CORPORATION (1)
5,586,170 Cellular devices, systems and methods using intercell macro-diversity and dynamic channel allocation 22 1994
 
HEWLETT-PACKARD COMPANY (1)
5,463,315 Spike suppression for a tester circuit for integrated circuits 9 1993
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
5,335,265 Apparatus for detecting and preventing subscriber number cloning in a cellular mobile telephone system 101 1993
 
HITACHI, LTD. (1)
6,975,604 Base station controller and mobile station 17 2000
 
HUAWEI TECHNOLOGIES CO., LTD. (1)
8,155,084 User equipment, call continuity application server, and network handover method 0 2009
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
5,659,596 System for location of communication end users 140 1995
 
IPR LICENSING, INC. (1)
7,911,993 Method and apparatus for allowing soft handoff of a CDMA reverse link utilizing an orthogonal channel structure 2 2003
 
JOE E. PURDIE, D.D.S. A DENTAL CORPORATION (1)
5,999,816 Method and apparatus for performing mobile assisted hard handoff between communication systems 109 1997
 
KABUSHIKI KAISHA TOSHIBA (1)
6,996,077 Satellite broadcasting system 8 1998
 
KONINKLIJKE KPN N.V. (1)
5,423,068 Method of managing, in a telecommunication network, user data of a user who may move from a base work area associated with a base exchange to another work area associated with another exchange 28 1993
 
KVASER CONSULTANT AKTIEBOLAG (1)
7,100,196 Device in a system operating with CAN-protocol and in a control and/or supervision system 2 2001
 
LG INFORMATION & COMMUNICATIONS, LTD. (1)
6,075,990 Handoff control method and communication system in a multiple frequency environment 40 1998
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (1)
6,088,347 Variable chip rate code-division multiple access 32 1999
 
MATRA COMMUNICATION (1)
5,448,600 Method for selecting propagation paths retained for receiving messages transmitted by CDMA radiocommunication 72 1994
 
METROPCS WIRELESS, INC. (1)
5,586,338 System identification (SID) list for selecting operating frequencies 90 1994
 
NOKIA NETWORKS OY (1)
6,353,638 Method and system for digital signal transmission 15 2000
 
NORTHERN TELECOM INC. (1)
5,930,714 CDMA inter-mobile switching center soft hand-off 36 1996
 
NORTHERN TELECOM LIMITED (1)
6,256,502 Wideband multicarrier power control for a cellular PCS basestation tranmitter 10 1998
 
OKI SEMICONDUCTOR CO., LTD. (1)
7,289,470 Method and apparatus of performing handoff 1 2002
 
OTTEN, DAVID D. (1)
5,339,330 Integrated cellular communications system 285 1991
 
PHOENIX CORPORATION (1)
5,319,634 Multiple access telephone extension systems and methods 199 1991
 
PHONEX CORPORATION (1)
5,911,119 Secure cordless telephone extension system and method 44 1996
 
REPEATER TECHNOLOGIES, INC. (1)
6,125,109 Delay combiner system for CDMA repeaters and low noise amplifiers 46 1998
 
ROCKSTAR BIDCO, LP (1)
5,544,167 Transmission method for CDMA radiotelephone communications, and apparatuses for implementing such method 22 1994
 
SIEMENS ENTERPRISE COMMUNICATIONS GMBH & CO. KG (1)
5,898,924 Method for connection handling in communication systems with wireless signal transmission 3 1995
 
SIEMENS STROMBERG-CARLSON (1)
5,521,963 System and method for using integrated services digital networks (ISDN) and the call appearance call handling (CACH) feature of electronic key telephone service (EKTS) technology for mobile systems 34 1994
 
SK TELECOM CO., LTD. (1)
7,978,664 Method for modem switching for use with MM-MB terminal 0 2004
 
SPECTRALINK CORPORATION (1)
5,673,307 Handoff method for indoor cellular phone system 122 1994
 
SPX CORPORATION (1)
7,505,837 Method and apparatus for linking to a vehicle diagnostic system 3 2004
 
SUMITOMO ELECTRIC INDUSTRIES, LTD. (1)
6,546,249 Seamless two-way roadway communication system 10 2000
 
SYMBOL TECHNOLOGIES, INC. (1)
6,473,449 High-data-rate wireless local-area network 74 2000
 
THERMO FUNDING COMPANY LLC (1)
6,661,996 Satellite communication system providing multi-gateway diversity to a mobile user terminal 6 1998
 
THOMSON LICENSING (1)
7,693,522 Method and apparatus for handing off a mobile terminal between a mobile network and a wireless LAN 0 2002
 
TORSAL TECHNOLOGY GROUP LTD. LLC (1)
5,483,664 Cellular communications with scheduled handoffs 39 1993
 
TRIMBLE NAVIGATION LIMITED (1)
5,450,395 Code position modulation system and method for multiple user satellite communications 53 1994
 
UNIDEN CORPORATION (1)
5,493,605 Cordless telephone system adaptive links between base units and handset units 6 1993
 
UTSTARCOM KOREA LIMITED (C/O OF UTSTARCOM, INC.) (1)
6,498,933 Method for transmitting data for inter-frequency/inter-system handover in mobile telecommunications system 14 2000
 
VERIZON SERVICES CORP. (1)
5,781,541 CDMA system having time-distributed transmission paths for multipath reception 84 1995
 
WI-LAN INC. (1)
6,859,444 Method and apparatus for handover in TDMA mobile communications system 9 1999
 
WICOM SOLUTIONS CO., LTD. (1)
5,649,000 Method and system for providing a different frequency handoff in a CDMA cellular telephone system 91 1994
 
XIROM WIRELESS, INC. (1)
5,963,586 Method and apparatus for parallel noncoherent correlation of a spread spectrum signal 11 1995
 
YOZAN INC. (1)
5,815,812 Soft handoff system of spread spectrum communication 3 1996
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (2)
5,659,546 Wideband frequency signal digitizer and method 30 1996
6,426,818 Optical interconnect for high speed processor 2 2002