US Patent No: 7,746,830

Number of patents in Portfolio can not be more than 2000

System and method for maintaining wireless channels over a reverse link of a CDMA wireless communication system

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Abstract

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A subscriber access unit includes a transceiver for providing wireless communication of digital signals. The digital signals are communicated to a base station using at least one radio frequency (RF) channel via Code Division Multiple Access (CDMA) modulated radio signals defined by orthogonal codes. Orthogonal subchannels are made available by the base station within each CDMA RF channel. A bandwidth manager is connected to the transceiver, and when the transceiver is actively sending data, at least one orthogonal subchannel is allocated by the base station on an as-needed basis. The number of orthogonal subchannels being allocated changes during a given session. The transceiver, when powered on but not actively sending data, provides an idling mode connection on a reverse link. The idling mode connection is based on an orthogonal subchannel shared with at least one other subscriber access unit, but utilizes different time slots of the shared orthogonal subchannel.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
INTEL CORPORATIONSANTA CLARA, CA27497
INTERDIGITAL TECHNOLOGY CORPORATIONWILMINGTON, DE1494

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Proctor,, Jr James A Indialantic, US 159 1198

Cited Art Landscape

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5,101,416 Multi-channel digital receiver for global positioning system 142 1990
 
COREEL MICROSYSTEMS (1)
6,198,723 Asynchronous transfer mode traffic shapers 76 1998
 
RCA Corporation (1)
4,577,316 Synchronization system for a regenerative subtransponder satellite communication system 83 1984
 
IDTP HOLDINGS, INC. (1)
6,868,075 Method and apparatus for compressed mode communications over a radio interface 80 2000
 
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (1)
6,222,873 Orthogonal complex spreading method for multichannel and apparatus thereof 43 1998
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (1)
6,111,863 Method and apparatus for the dynamic allocation of signal bandwidth between audio, video and data signals 96 1995
 
QUALCOMM INCORPORATED (55)
5,056,109 Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system 917 1989
5,103,459 System and method for generating signal waveforms in a CDMA cellular telephone system 1655 1990
5,257,283 Spread spectrum transmitter power control method and system 324 1991
5,267,262 Transmitter power control system 460 1991
5,280,472 CDMA microcellular telephone system and distributed antenna system therefor 508 1992
5,437,055 Antenna system for multipath diversity in an indoor microcellular communication system 127 1993
5,414,728 Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels 257 1993
5,715,236 System and method for generating signal waveforms in a CDMA cellular telephone system 106 1993
5,621,752 Adaptive sectorization in a spread spectrum communication system 171 1994
5,604,730 Remote transmitter power control in a contention based multiple access system 214 1994
5,577,022 Pilot signal searching technique for a cellular communications system 184 1994
5,673,259 Random access communications channel for data services 303 1995
5,784,406 Method and apparatus for objectively characterizing communications link quality 102 1995
5,854,786 Method and apparatus for distribution/consolidation (DISCO) interface units for packet switched interconnection system 63 1995
5,581,575 Method and apparatus for transmission of variable rate digital data 89 1995
5,930,230 High data rate CDMA wireless communication system 133 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 117 1996
5,881,368 Method and apparatus of power control in a CDMA dispatch system 122 1996
5,884,196 Method and apparatus of preserving power of a remote unit in a dispatch system 150 1996
5,926,500 Reduced peak-to-average transmit power high data rate CDMA wireless communication system 87 1996
5,781,543 Power-efficient acquisition of a CDMA pilot signal 97 1996
5,893,035 Centralized forward link power control 106 1996
5,960,361 Method and apparatus for performing a fast downward move in a cellular telephone forward link power control system 101 1996
6,075,974 Method and apparatus for adjusting thresholds and measurements of received signals by anticipating power control commands yet to be executed 128 1996
5,892,774 Phase shift encoded subchannel 48 1996
5,933,781 Pilot based, reversed channel power control 80 1997
5,991,284 Subchannel control loop 77 1997
5,867,527 Method of searching for a bursty signal 71 1997
5,914,950 Method and apparatus for reverse link rate scheduling 266 1997
6,069,880 Method and apparatus for scanning other frequency pilot signals in a code division multiple access communication system 66 1997
5,982,760 Method and apparatus for power adaptation control in closed-loop communications 195 1997
* 6,426,960 Increased capacity data transmission in a CDMA wireless communication system 60 1997
6,396,804 High data rate CDMA wireless communication system 119 1997
6,188,678 Method and apparatus for adaptive closed loop power control using open loop measurements 89 1997
5,923,650 Method and apparatus for reverse link rate scheduling 285 1997
6,097,972 Method and apparatus for processing power control signals in CDMA mobile telephone system 87 1997
6,377,809 Channel structure for communication systems 185 1997
6,389,000 Method and apparatus for transmitting and receiving high speed data in a CDMA communication system using multiple carriers 101 1997
6,101,179 Accurate open loop power control in a code division multiple access communication system 136 1997
6,005,855 Method and apparatus for providing variable rate data in a communications system using statistical multiplexing 119 1997
6,574,211 Method and apparatus for high rate packet data transmission 507 1997
6,064,678 Method for assigning optimal packet lengths in a variable rate communication system 103 1997
6,307,840 Mobile station assisted timing synchronization in CDMA communication system 109 1998
6,275,478 Methods and apparatuses for fast power control of signals transmitted on a multiple access channel 58 1998
6,058,338 Method and apparatus for efficient GPS assistance in a communication system 177 1999
6,690,938 System and method for reducing dropped calls in a wireless communications network 39 1999
6,587,446 Handoff in a wireless communication system 37 1999
6,782,277 Wireless communication system with base station beam sweeping 36 1999
6,353,412 Method and apparatus for determining position location using reduced number of GPS satellites and synchronized and unsynchronized base stations 120 1999
6,532,226 Method and arrangement for optimal scheduling of slotted-mode related measurements in a cellular radio system 34 1999
6,246,673 Method and system for handoff between an asynchronous CDMA base station and a synchronous CDMA base station 127 2000
6,501,787 High-data-rate supplemental channel for CDMA telecommunications system 23 2000
6,963,540 Apparatus and method for assigning a common packet channel in a CDMA communication system 91 2000
2003/0123,401 Reverse link power controlled repeater 83 2002
2005/0208,961 Method and apparatus for controlling transmit power of multiple channels in a CDMA communication system 107 2005
 
VERIZON PATENT AND LICENSING INC. (1)
5,463,629 Dynamic channel allocation method and system for integrated services digital network 117 1992
 
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (1)
5,634,199 Method of subspace beamforming using adaptive transmitting antennas with feedback 157 1995
 
ALCATEL-LUCENT USA INC. (1)
6,038,450 Soft handover system for a multiple sub-carrier communication system and method thereof 205 1997
 
ERICSSON GE MOBILE COMMUNICATIONS INC. (1)
5,353,332 Method and apparatus for communication control in a radiotelephone system 206 1992
 
ERICSSON INC. (4)
5,790,549 Subtractive multicarrier CDMA access methods and systems 63 1996
5,844,894 Time-reuse partitioning system and methods for cellular radio telephone systems 114 1996
5,894,473 Multiple access communications system and method using code and time division 198 1996
6,768,727 Fast forward link power control for CDMA system 81 2000
 
RESOUND CORPORATION (1)
5,905,473 Adjustable array antenna 91 1997
 
AIRSPAN NETWORKS INC. (1)
6,134,233 Apparatus and method of frame aligning information in a wireless telecommunications system 58 1997
 
Ortho Pharmaceutical Corporation (1)
6,001,800 Spray dried erythropoietin 48 1998
 
ALCATEL N.V. (2)
5,373,502 Process, transmitter and receiver for data transmission with variable traffic volume and a control station for coordinating several such transmitters and receivers 215 1993
5,606,580 Method of adjusting the length of a data block in a time-division multiple access communication system 59 1994
 
RPX CORPORATION (1)
6,269,075 Finger assignment in a CDMA rake receiver 113 1998
 
FRANCE TELECOM (1)
6,724,743 Method of conjoint detection of a set of CDMA codes 34 2000
 
Tachyon, Inc. (1)
6,735,188 Channel encoding and decoding method and apparatus 83 1999
 
ALCATEL (1)
6,526,064 Method for transmitting on a plurality of transmission media, with dynamic data dispatching, and corresponding transmitter and terminal 39 1998
 
Unisys Corporation (1)
5,619,492 CDMA communication system in which bit rates are dynamically allocated 94 1995
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (2)
5,559,789 CDMA/TDD Radio Communication System 99 1995
6,337,668 Antenna apparatus 125 2000
 
AT&T CORP. (7)
5,375,124 Method and apparatus for providing ISDN access 123 1992
5,442,625 Code division multiple access system providing variable data rate access to a user 328 1994
5,592,470 Broadband wireless system and network architecture providing broadband/narrowband service with optimal static and dynamic bandwidth/channel allocation 501 1994
5,856,971 Code division multiple access system providing variable data rate access to a user 100 1995
6,195,362 Resource pooling system and method in communication systems 56 1996
6,262,980 Dynamic resource allocation method and apparatus for broadband services in a wireless communications system 120 1997
6,940,845 Asymmetric measurement-based dynamic packet assignment system and method for wireless data services 88 2001
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
HYPRES, INC. (1)
9,312,895 Two stage radio frequency interference cancellation system and method 5 2015
 
SONY CORPORATION (1)
* 2009/0156,130 BEAM STEERING ALGORITHM FOR NLOS WIRELESS SYSTEMS WITH PREDEFINED PARAMETERS 4 2008
* Cited By Examiner

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