Methods and apparatus for multi-carrier communication systems with adaptive transmission and feedback

• US 9,301,296 B2
• Filed: 11/12/2014
• Issued: 03/29/2016
• Est. Priority Date: 01/29/2004
• Status: Active Grant

• Current Assignee: Neo Wireless LLC (f/k/a CFIP NCF LLC) (SoftBank Group Corp.)
• Original Assignee: Neocific Incorporated
• Inventors: Li, Xiaodong, Lo, Titus, Li, Kemin, Huang, Haiming
• Primary Examiner(s): LEVITAN, DMITRY
• Application Number:
  US14/539,917
• Publication Number:
  US 20150139177A1
• Time in Patent Office: 503 Days
• Field of Search: 370/310, 370/328, 370/349, 370/350, 370/431, 370/436, 370/458
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0029 Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling power control H04W52/04
• CPC Class Codes: H04L 1/0068 by puncturing
• CPC Class Codes: H04L 1/0073 Special arrangements for feedback channel
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

An arrangement is disclosed where in a multi-carrier communication system, the modulation scheme, coding attributes, training pilots, and signal power may be adjusted to adapt to channel conditions in order to maximize the overall system capacity and spectral efficiency without wasting radio resources or compromising error probability performance, etc.

Claims

1. A transmission control method by a base station serving a plurality of mobile stations in a multi-carrier communication system, the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain, the method comprising:

determining a set of mobile station-based transmission parameters to be used for a subsequent transmission, the set of transmission parameters indicating a pilot pattern for one or more frequency subchannels utilized by the system, wherein the pilot pattern differs from one time slot to another and wherein the pilot pattern is based on channel conditions or other factors; and

sending a control message to a mobile station, the control message providing information regarding the set of transmission parameters.

2. The method of claim 1, wherein the set of mobile station-based transmission parameters further comprises a modulation and coding scheme.

3. The method of claim 1, wherein the set of mobile station-based transmission parameters further comprises a multiple-input multiple-output (MIMO) scheme.

4. The method of claim 3, wherein the pilot pattern and the MIMO scheme are jointly adapted.

5. The method of claim 1, wherein the pilot pattern includes a number of pilot symbols.

6. The method of claim 1, wherein the pilot pattern includes locations of pilot symbols in time or frequency or space.

7. The method of claim 1, wherein the pilot pattern includes amplitudes and phases of pilot symbols.

8. The method of claim 1, wherein the other factors include a transmission antenna technique.

9. The method of claim 1, wherein the other factors include a subchannel configuration.

10. A transmission control method by a mobile station served by a base station in a multi-carrier communication system, the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain, the method comprising:

receiving, at the mobile station, a control message from the serving base station, the control message providing information regarding a set of mobile station-based transmission parameters to be used for a subsequent transmission; and

determining a pilot pattern for one or more frequency subchannels based on a pilot pattern indicator contained in the set of received transmission parameters, wherein the pilot pattern differs from one time slot to another and wherein the pilot pattern is based on channel conditions or other factors.

11. The method of claim 10, wherein the pilot pattern includes a number of pilot symbols.

12. The method of claim 10, wherein the pilot pattern includes locations of pilot symbols in time or frequency or space.

13. The method of claim 10, wherein the pilot pattern includes amplitudes and phases of pilot symbols.

14. A base station serving a plurality of mobile stations in a multi-carrier communication system, the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain, the base station comprising:

a processor configured to determine a set of mobile station-based transmission parameters to be used for a subsequent transmission, the set of transmission parameters indicating a pilot pattern for one or more frequency subchannels utilized by the system, wherein the pilot pattern differs from one time slot to another and wherein the pilot pattern is based on channel conditions or other factors; and

a transmitter configured to transmit a control message to a mobile station, the control message providing information regarding the set of transmission parameters.

15. The base station of claim 14, wherein the set of mobile station-based transmission parameters further comprises a multiple-input multiple-output (MIMO) scheme.

16. The base station of claim 15, wherein the pilot pattern and the MIMO scheme are jointly adapted.

17. The base station of claim 14, wherein the pilot pattern includes a number of pilot symbols.

18. The base station in claim 14, wherein the pilot pattern includes locations of pilot symbols in time or frequency or space.

19. The base station of claim 14, wherein the pilot pattern includes amplitudes and phases of pilot symbols.

20. The base station of claim 14, wherein the other factors include a transmission antenna technique.

21. The base station of claim 14, wherein the other factors include a subchannel configuration.

22. A mobile station served by a base station in a multi-carrier communication system, the communication system utilizing a transmission structure with time slots in the time domain and frequency subchannels in the frequency domain, the mobile station comprising:

a receiver configured to receive a control message from the serving base station, the control message providing information regarding a set of mobile station-based transmission parameters to be used for a subsequent transmission; and

a processor configured to determine a pilot pattern for one or more frequency subchannels based on a pilot pattern indicator contained in the set of received transmission parameters, wherein the pilot pattern differs from one time slot to another and wherein the pilot pattern is based on channel conditions or other factors.

23. The mobile station of claim 22, wherein the pilot pattern includes a number of pilot symbols.

24. The mobile station of claim 22, wherein the pilot pattern includes locations of pilot symbols in time or frequency or space.

25. The mobile station of claim 22, wherein the pilot pattern includes amplitudes and phases of pilot symbols.