US Patent No: 5,841,768

Number of patents in Portfolio can not be more than 2000

Method of controlling initial power ramp-up in CDMA systems by using short codes

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Importance

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Abstract

A system and method of controlling transmission power during the establishment of a channel in a CDMA communication system utilize the transmission of a short code from a subscriber unit to a base station during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional spreading code. The ramp-up starts from a power level that is guaranteed to be lower than the required power level for detection by the base station. The subscriber unit quickly increases transmission power while repeatedly transmitting the short code until the signal is detected by the base station. Once the base station detects the short code, it sends an indication to the subscriber unit to cease increasing transmission power. The use of short codes limits power overshoot and interference to other subscriber stations and permits the base station to quickly synchronize to the spreading code used by the subscriber unit.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
INTERDIGITAL TECHNOLOGY CORPORATIONWILMINGTON, DE1483

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lomp, Gary R Centerport, NY 79 1164
Ozluturk, Faith M Port Washington, NY 17 194

Cited Art

Patent Info (Count) # Cites Year
 
QUALCOMM INCORPORATED (6)
5,056,109 Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system 809 1989
5,265,119 Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system 383 1991
5,257,283 Spread spectrum transmitter power control method and system 288 1991
5,267,262 Transmitter power control system 417 1991
5,309,474 System and method for generating signal waveforms in a CDMA cellular telephone system 293 1992
5,414,728 Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels 225 1993
 
ERICSSON GE MOBILE COMMUNICATIONS INC. (3)
5,353,352 Multiple access coding for radio communications 138 1992
5,430,760 Random access in mobile radio telephone systems 180 1994
5,377,183 Calling channel in CDMA communications system 121 1994
 
MOTOROLA, INC. (2)
5,159,283 Power amplifier 67 1991
5,235,614 Method and apparatus for accommodating a variable number of communication channels in a spread spectrum communication system 102 1992
 
AGENCE SPATIALE EUROPEENNE (1)
5,327,455 Method and device for multiplexing data signals 189 1993
 
AT&T BELL LABORATORIES (1)
5,353,302 Signal despreader for CDMA systems 78 1993
 
CANON KABUSHIKI KAISHA (1)
5,442,662 Code-division multiple-access communication system providing enhanced capacity within limited bandwidth 125 1994
 
CELSAT CORPORATION (1)
5,446,756 Integrated cellular communications system 314 1993
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
5,113,525 Linear-modulation type radio transmitter 60 1990
 
MOTOROLA SOLUTIONS, INC. (1)
5,297,162 System and method for bit timing synchronization in an adaptive direct sequence CDMA communication system 106 1993
 
UNISYS CORPORATION (1)
5,022,049 Multiple access code acquisition system 90 1989
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
4,811,421 Transmission power control device in a radio communication transmitting/receiving station 189 1987

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
INTERDIGITAL TECHNOLOGY CORPORATION (46)
6,414,951 Method for detecting short codes in CDMA systems 7 1999
6,493,563 Method of controlling initial power ramp-up in CDMA systems by using short codes 16 2000
7,072,380 Apparatus for initial power control for spread-spectrum communications 23 2000
7,020,111 System for using rapid acquisition spreading codes for spread-spectrum communications 25 2000
6,707,805 Method for initial power control for spread-spectrum communications 20 2000
6,983,009 Median weighted tracking for spread-spectrum communications 21 2001
6,721,301 Centroid tracking for spread-spectrum communications 26 2001
6,697,350 Adaptive vector correlator for spread-spectrum communications 28 2001
6,456,608 Adaptive vector correlator using weighting signals for spread-spectrum communications 55 2001
7,929,498 Adaptive forward power control and adaptive reverse power control for spread-spectrum communications 21 2001
6,940,840 Apparatus for adaptive reverse power control for spread-spectrum communications 28 2001
6,816,473 Method for adaptive forward power control for spread-spectrum communications 16 2001
6,788,662 Method for adaptive reverse power control for spread-spectrum communications 17 2001
7,123,600 Initial power control for spread-spectrum communications 22 2001
7,496,072 System and method for controlling signal strength over a reverse link of a CDMA wireless communication system 1 2001
7,502,406 Automatic power control system for a code division multiple access (CDMA) communications system 6 2002
6,879,841 Method employed by a subscriber unit for controlling initial power ramp-up using short codes 12 2002
6,577,876 Base station for controlling initial power ramp-up using short codes 16 2002
6,571,105 Method employed by a base station for controlling initial power ramp-up using short codes 14 2002
6,519,474 Subscriber unit for controlling initial power ramp-up using short codes 11 2002
6,507,745 Apparatus for controlling initial power ramp-up in a CDMA system by using short codes 14 2002
6,490,462 Method of controlling initial power ramp-up in a CDMA system by using short codes 16 2002
6,751,208 Short code detection method 1 2002
6,744,755 Base station for detecting short codes 2 2002
6,744,756 System for detecting short codes 1 2002
6,741,584 User equipment for detecting short codes 1 2002
6,904,294 Subscriber unit for controlling initial power ramp-up using short codes 17 2002
6,778,840 Method of controlling initial power ramp-up in a CDMA system by using short codes 13 2002
6,606,503 Apparatus for controlling initial power ramp-up in a CDMA system by using short codes 17 2002
7,085,583 Communication unit for access 11 2003
6,839,567 Method employed by a base station for controlling initial power ramp-up using short codes 15 2003
7,756,190 Transferring voice and non-voice data 1 2003
7,593,453 Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system 4 2004
7,903,613 Code division multiple access (CDMA) communication system 2 2004
7,106,720 User equipment for detecting short codes 3 2004
7,117,004 Method and subscriber unit for performing an access procedure 14 2004
7,535,874 Method and apparatus for adaptive power control for spread-spectrum communications 11 2004
7,218,625 Initial power control for spread-spectrum communications 0 2004
8,009,636 Method and apparatus for performing an access procedure 1 2005
7,286,847 Method and apparatus for performing an access procedure 9 2005
7,190,966 Method and apparatus for performing an access procedure 11 2005
7,706,332 Method and subscriber unit for performing power control 5 2005
7,746,830 System and method for maintaining wireless channels over a reverse link of a CDMA wireless communication system 0 2005
7,889,664 User equipment for detecting short codes 0 2006
7,873,328 Subscriber unit for performing an access procedure 0 2008
7,706,830 Method and subscriber unit for performing an access procedure 3 2008
 
INTEL CORPORATION (9)
8,175,120 Minimal maintenance link to support synchronization 0 2001
7,936,728 System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system 0 2001
8,155,096 Antenna control system and method 0 2001
7,773,566 System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system 0 2004
7,480,280 Fast acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system 2 2005
8,134,980 Transmittal of heartbeat signal at a lower level than heartbeat request 1 2007
8,274,954 Alternate channel for carrying selected message types 0 2009
8,139,546 System and method for maintaining wireless channels over a reverse link of a CDMA wireless communication system 0 2010
8,437,330 Antenna control system and method 0 2012
 
GOOGLE INC. (7)
6,606,341 Common packet channel with firm handoff 16 1999
6,643,318 Hybrid DSMA/CDMA (digital sense multiple access/code division multiple access) method with collision resolution for packet communications 47 2000
6,507,601 Collision avoidance 32 2001
6,639,936 Pre-data power control common packet channel 7 2002
7,046,717 Pre-data power control common packet channel 31 2003
6,996,155 Common packet channel 2 2003
7,075,971 Hybrid DSMA/CDMA (digital sense multiple access/code division multiple access) method with collision resolution for packet communications 31 2003
 
AXXANA (ISRAEL) LTD (5)
7,707,453 Remote data mirroring system 2 2006
7,984,327 Fast data recovery system 1 2008
8,015,436 Resilient data storage in the presence of replication faults and rolling disasters 1 2009
8,289,694 Disaster-proof storage unit having transmission capabilities 0 2009
7,996,709 Remote data mirroring system 0 2010
 
GOLDEN BRIDGE TECHNOLOGY (5)
6,574,267 Rach ramp-up acknowledgement 43 1999
6,717,975 Common packet channel 8 2001
7,359,427 Rach ramp-up acknowledgement 2 2003
6,985,511 Common packet channel with firm handoff 3 2003
7,508,861 RACH ramp-up acknowledgement 2 2007
 
QUALCOMM INCORPORATED (4)
7,024,611 Method and apparatus for time efficient retransmission using symbol accumulation 6 2003
7,734,260 Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system 0 2007
7,426,391 Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system 0 2007
8,438,447 Method and apparatus for time efficient retransmission using symbol accumulation 0 2012
 
LG ELECTRONICS INC. (2)
7,068,613 Method and apparatus for stopping data/packet transmission 1 2000
7,061,878 Method and apparatus for stopping data/packet transmission 2 2004
 
ALCATEL (1)
7,016,335 Transmitting facility and receiving facility for a multipoint-to-point synchronous CDMA network 1 2000
 
ENTROPIC COMMUNICATIONS, INC. (1)
7,248,890 Channel power balancing in a multi-channel transceiver system 5 2004
 
INTERDIGITAL COMMUNICATIONS CORPORATION (1)
7,437,177 Method employed by a base station for controlling initial power ramp-up using short codes 14 2008
 
INTERDIGITAL CORPORATION (1)
7,602,749 Fast acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system 0 2002
 
IPR LICENSING, INC. (1)
8,321,542 Wireless channel allocation in a base station processor 2000
 
NOKIA MOBILE PHONES LTD. (1)
6,295,289 Power control in a transmitter 36 1999
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (1)
6,654,608 Tailored power levels at handoff and call setup 5 1999
 
TEXAS INSTRUMENTS INCORPORATED (1)
6,272,166 Reduced gain spread spectrum communication system and method 7 1997