US Patent No: 5,828,662

Number of patents in Portfolio can not be more than 2000

Medium access control scheme for data transmission on code division multiple access (CDMA) wireless systems

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Abstract

A synchronous discontinuous transmission medium access control (SDTX-MAC) method and apparatus for more efficiently using existing uplink channels by sharing these uplink channels between multiple terminals engaged in bursty data transmission. This is accomplished by assigning each mobile terminal an individual time slot and by not requiring each mobile terminal to broadcast its identity. This results in a reduction in the number of receivers on each base station and a reduction in the length of the synchronization message.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
APPLE INC.CUPERTINO, CA7542

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jalali, Ahmad San Diego, CA 113 2021
Krzymien, Witold Edmonton, CA 4 111
Mermelstein, Paul Cote St. Luc, CA 11 387

Cited Art

Patent Info (Count) # Cites Year
 
QUALCOMM INCORPORATED (5)
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5,640,414 Mobile station assisted soft handoff in a CDMA cellular communications system 275 1994
5,511,067 Layered channel element in a base station modem for a CDMA cellular communication system 128 1994
5,604,730 Remote transmitter power control in a contention based multiple access system 169 1994
5,673,259 Random access communications channel for data services 231 1995
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (2)
5,295,152 TDMA for mobile access in a CDMA system 107 1992
5,603,081 Method for communicating in a wireless communication system 204 1993
 
MOTOROLA SOLUTIONS, INC. (1)
5,586,120 Method for a channel hopping communication system with variable transmission bandwidth 23 1995
 
NOKIA MOBILTELEFONER AB (1)
5,257,257 Method of controlling the operation of a packet switched CDMA communication network for controlling the operation of transmitters and receivers 93 1992
 
NOKIA SIEMENS NETWORKS OY (1)
5,394,391 Method of controlling the operation of a packet switched CDMA telecommunication network 51 1993
 
SCS MOBILECOM CORPORATION, A CORPORATION OF NEW YORK (1)
5,260,967 CDMA/TDMA spread-spectrum communications system and method 142 1992

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
INTERDIGITAL TECHNOLOGY CORPORATION (31)
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QUALCOMM INCORPORATED (14)
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FIPA FROHWITTER INTELLECTUAL PROPERTY AG (5)
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IPR LICENSING, INC. (4)
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NOKIA CORPORATION (3)
6,091,717 Method for scheduling packet data transmission 75 1997
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SAMSUNG ELECTRONICS CO., LTD. (3)
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NOKIA MOBILE PHONES LTD. (2)
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ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (1)
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FUJITSU LIMITED (1)
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HUAWEI TECHNOLOGIES CO., LTD. (1)
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INTERDIGITAL COMMUNICATIONS CORPORATION (1)
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INTERDIGITAL CORPORATION (1)
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