US Patent No: 6,452,913
Number of patents in Portfolio can not be more than 2000
Fast acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system
Stats
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Sep 17, 2002
Issued date -
Feb 29, 2000
filing date -
09/515,487
serial no -
In Force
status
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Abstract
A service option overlay for a CDMA wireless communication in which multiple allocatable subchannels are defined on a reverse link by assigning different code phases of a given long pseudonoise (PN) code to each subchannel. The instantaneous bandwidth needs of each on-line subscriber unit are then met by dynamically allocating none, one, or multiple subchannels on an as needed basis for each network layer connection. The system efficiently provides a relatively large number of virtual physical connections between the subscriber units and the base stations on the reverse link for extended idle periods such as when computers connected to the subscriber units are powered on, but not presently actively sending or receiving data. These maintenance subchannels permit the base station and the subscriber units to remain in phase and time synchronism. This in turn allows fast acquisition of additional subchannels as needed by allocating new code phase subchannels. Preferably, the code phases of the new channels are assigned according to a predetermined code phase relationship with respect to the code phase of the corresponding maintenance subchannel.
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First Claim
Related Publications
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International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,442,625 Code division multiple access system providing variable data rate access to a user | 279 | 1994 | |
| 5,592,470 Broadband wireless system and network architecture providing broadband/narrowband service with optimal static and dynamic bandwidth/channel allocation | 360 | 1994 | |
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| 5,687,194 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels | 161 | 1993 | |
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| 6,222,832 Fast Acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system | 66 | 1998 | |
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| 5,655,001 Wireless telecommunication system using protocol conversion for signaling between base stations and land based switches | 66 | 1994 | |
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| 5,511,068 Mobile communication system capable of transmitting and receiving a radio signal obtained by TDMA and CDMA without interference | 61 | 1994 | |
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| 5,325,419 Wireless digital personal communications system having voice/data/image two-way calling and intercell hand-off | 225 | 1993 | |
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| 5,481,533 Hybrid intra-cell TDMA/inter-cell CDMA for wireless networks | 192 | 1994 | |
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| 5,412,429 Picture data compression coder using subband/transform coding with a Lempel-Ziv-based coder | 84 | 1993 | |
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| 5,490,136 Method of controlling transmission on a same radio channel of variable-rate information streams in radio communication systems | 80 | 1994 | |
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| 5,619,492 CDMA communication system in which bit rates are dynamically allocated | 68 | 1995 | |
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| 5,282,222 Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum | 406 | 1992 | |
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| 5,114,375 Toy apparatus | 35 | 1991 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 17, 2014 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |