Method and apparatus for a spectrally compliant cellular communication system

• US 8,755,360 B2
• Filed: 07/31/2008
• Issued: 06/17/2014
• Est. Priority Date: 12/20/1999
• Status: Expired due to Fees

• Current Assignee: IPR Licensing Incorporated (InterDigital, Inc.)
• Original Assignee: IPR Licensing Incorporated (InterDigital, Inc.)
• Inventors: Amalfitano, Carlo, Proctor, James A. Jr.
• Primary Examiner(s): AJIBADE AKONAI, OLUMIDE
• Application Number:
  US12/183,780
• Publication Number:
  US 20090052404A1
• Time in Patent Office: 2,147 Days
• Field of Search: 455/403, 455/422.1, 455423-425, 455/435.2, 455/435.3, 455436-444, 455/524, 455/525, 370/280, 370/329, 370/331, 370/335, 370/341, 370/342, 370/441, 370/208, 370/209, 370/320, 370/328, 375/146
• US Class Current: 370/335
• CPC Class Codes: H04B 7/216 Code division or spread-spectrum multiple access [CDMA, SSMA]
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0042 Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape H04L1/0067 takes precedence
• CPC Class Codes: H04L 25/00 Baseband systems
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 36/185 using make before break
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

A system for wireless data transmission that uses a channel bandwidth, channel separation, and radio frequency power spectrum which is compatible with existing deployments of wireless voice services. The transmitted waveforms are thus compatible with existing cellular networks. However, the time domain digital coding, modulation, and power control schemes are optimized for data transmission. Existing cellular network sites can thus be used to provide a high speed service optimized for wireless data traffic without the need for new radio frequency planning, and without interfering with existing voice service deployments.

Claims

1. A code division multiple access (CDMA) subscriber unit comprising:

circuitry configured to receive a first CDMA code channel;

wherein the first CDMA code channel carries at least voice data;

wherein the circuitry is further configured to receive a second CDMA code channel and a third packet data channel;

wherein the second CDMA code channel includes a continuous pilot and the third packet data channel has a varying number of CDMA codes;

wherein the circuitry is further configured to transmit a fourth CDMA code channel;

wherein the fourth CDMA code channel carries at least voice data;

wherein the circuitry is further configured to transmit a fifth packet data channel;

wherein the fifth packet data channel has a varying number of CDMA codes.

2. The CDMA subscriber unit of claim 1 wherein the first and the fourth CDMA code channels are configured for soft handover and the third packet data channel is not configured for soft handover.

3. The CDMA subscriber unit of claim 1 wherein the third packet data channel is ⅓

rate FEC encoded.

4. The CDMA subscriber unit of claim 1 wherein the circuitry is further configured to include pilot symbols in at least one of the fourth CDMA code channel or the fifth packet data channel.

5. The CDMA subscriber unit of claim 1 wherein the circuitry is further configured to include information indicative of an encoding rate in at least one of the fourth CDMA code channel or the fifth packet data channel.

6. A code division multiple access (CDMA) base station comprising:

circuitry configured to transmit a first CDMA code channel;

wherein the first CDMA code channel carries at least voice data;

wherein the circuitry is further configured to transmit a second CDMA code channel and a third packet data channel;

wherein the second CDMA code channel includes a continuous pilot and the third packet data channel has a varying number of CDMA codes;

wherein the circuitry is further configured to receive a fourth CDMA code channel;

wherein the fourth CDMA code channel carries at least voice data;

wherein the circuitry is further configured to receive a fifth packet data channel;

wherein the fifth packet data channel has a varying number of CDMA codes.

7. The CDMA base station of claim 6 wherein the first and the fourth CDMA code channels are configured for soft handover and the third packet data channel is not configured for soft handover.

8. The CDMA base station of claim 6 wherein the third packet data channel is ⅓

rate FEC encoded.

9. The CDMA base station of claim 6 wherein the circuitry is further configured to utilize included pilot symbols in at least one of the fourth CDMA code channel or the fifth packet data channel.

10. The CDMA base station of claim 6 wherein the circuitry is further configured to utilize included information indicative of an encoding rate in at least one of the fourth CDMA code channel or the fifth packet data channel.