Asymmetric mode of operation in multi-carrier communication systems

• US 8,160,596 B2
• Filed: 07/13/2006
• Issued: 04/17/2012
• Est. Priority Date: 07/20/2005
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Black, Peter John, Attar, Rashid Ahmed Akbar, Rezaiifar, Ramin, Agashe, Parag Arun, Fan, Mingxi, Rimini, Roberto, Ma, Jun
• Primary Examiner(s): Mehrpour, Melody
• Application Number:
  US11/486,513
• Publication Number:
  US 20070060165A1
• Time in Patent Office: 2,105 Days
• Field of Search: 455/450, 455/522, 455/445, 370/335, 370/342, 370/328, 370/319, 370/469, 370/437, 370/473
• US Class Current: 455/450
• CPC Class Codes: H04B 7/264 for data rate control
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601

Abstract

A method and system for providing asymmetric modes of operation in multi-carrier wireless communication systems. A method may assign a long code mask (LCM) to an information channel associated with a plurality of forward link carriers to transmit data from an access network to an access terminal; and multiplex the information channel on a reverse link carrier. The information channel may include one of data source channel (DSC), data rate control (DRC) and acknowledgment (ACK) information, and the multiplexing may be code division multiplexing (CDM). The AN may instruct the AT on whether to multiplex the DSC information based on feedback from the AT. The method may further offset the ACK information on the reverse link to reduce the reverse link peak to average, CDM the information channel on an I-branch and on a Q-branch, and transmit the code division multiplexed information channel on the reverse link carrier.

Claims

1. A method comprising:

assigning a long code mask (LCM) to an information channel associated with a plurality of forward link carriers to transmit data from a base station or access network to an access terminal; and

multiplexing the information channel on a reverse link carrier.

2. The method of claim 1, wherein the information channel includes at least one of data source channel (DSC) information, data rate control (DRC) information and acknowledgment (ACK) information.

3. The method of claim 2, further comprising offsetting the ACK information on the reverse link to reduce the reverse link peak to average.

4. The method of claim 2, further comprising instructing the access terminal on whether to multiplex the DSC information based on feedback from the access terminal.

5. The method of claim 1, wherein the multiplexing is code division multiplexing (CDM).

6. The method of claim 5, further comprising code division multiplexing the information channel on an I-branch and on a Q-branch.

7. The method of claim 5, wherein the information channel includes data rate control (DRC) information on both the I-branch and on the Q-branch.

8. The method of claim 5, wherein the information channel includes acknowledgment (ACK) information on both the I-branch and on the Q-branch.

9. The method of claim 5, further comprising transmitting the code division multiplexed information channel on the reverse link carrier.

10. The method of claim 7, further comprising covering the data rate control (DRC) information with Walsh codewords.

11. The method of claim 8, further comprising covering the acknowledgment (ACK) information with Walsh codewords.

12. The method of claim 7, further comprising combining the data rate control (DRC) information with data rate control (DRC) cover symbols on both the I-branch and on the Q-branch.

13. The method of claim 12, wherein the data rate control (DRC) cover symbols are channelized by offset Walsh codes.

14. A system comprising:

a controller adapted to;

assign a long code mask (LCM) to an information channel associated with a plurality of forward link carriers to transmit data from a base station or access network to an access terminal; and

the access terminal being adapted to multiplex the information channel on a reverse link carrier.

15. The system of claim 14, wherein the controller is in the base station.

16. The system of claim 14, wherein the controller is in a base station controller or the access network.

17. The system of claim 14, wherein the information channel includes at least one of data source channel (DSC) information, data rate control (DRC) information and acknowledgment (ACK) information.

18. The system of claim 17, wherein the access terminal is adapted to offset the ACK information on the reverse link to reduce the reverse link peak to average.

19. The system of claim 14, wherein the multiplex is code division multiplex (CDM).

20. The system of claim 19, wherein the access terminal is adapted to transmit the code division multiplexed information channel on the reverse link carrier.

21. The system of claim 17, wherein the access network is adapted to instruct the access terminal on whether to multiplex the DSC information based on feedback from the access terminal.

22. An access terminal comprising:

receiver to receive data from a base station on a long code mask (LCM) of an information channel associated with a plurality of forward link carriers;

transmitter to transmit data on a reverse link carrier to the base station; and

means for multiplexing the information channel on the reverse link carrier.

23. The access terminal of claim 22, wherein the multiplexing means includes means for code division multiplexing (CDM).

24. The access terminal of claim 22, further comprising means for code division multiplexing the information channel on an I-branch and on a Q-branch.

25. The access terminal of claim 24, wherein the information channel includes data rate control (DRC) information on both the I-branch and on the Q-branch.

26. The access terminal of claim 24, wherein the information channel includes acknowledgment (ACK) information on both the I-branch and on the Q-branch.

27. The access terminal of claim 22, further comprising means for transmitting the code division multiplexed information channel on the reverse link carrier.

28. The access terminal of claim 25, further comprising means for covering the data rate control (DRC) information with Walsh codewords.

29. The access terminal of claim 26, further comprising means for covering the acknowledgment (ACK) information with Walsh codewords.

30. The access terminal of claim 25, further comprising means for combining the data rate control (DRC) information with data rate control (DRC) cover symbols on both the I-branch and on the Q-branch.

31. The access terminal of claim 25, wherein the data rate control (DRC) cover symbols are channelized by offset Walsh codes.

32. A computer-readable storage medium comprising code, which, when executed by a processor, causes the processor to perform operations for multi-carrier communication, the code comprising:

code for processing data received from a base station on a long code mask (LCM) of an information channel associated with a plurality of forward link carriers;

code for processing data for transmission on a reverse link carrier to the base station; and

code for multiplexing the information channel on the reverse link carrier.

33. The computer-readable storage medium of claim 32, wherein the multiplexing code includes code for code division multiplexing (CDM).

34. The computer-readable storage medium of claim 32, further comprising code for code division multiplexing the information channel on an I-branch and on a Q-branch.