Methods and apparatus for scheduling peer to peer traffic in cellular networks

• US 8,705,486 B2
• Filed: 01/19/2011
• Issued: 04/22/2014
• Est. Priority Date: 01/19/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Patil, Shailesh, Wang, Hua, Wu, Xinzhou, Li, Junyi
• Primary Examiner(s): Phillips, Hassan
• Assistant Examiner(s): JONES, PRENELL P
• Application Number:
  US13/008,971
• Publication Number:
  US 20120182962A1
• Time in Patent Office: 1,189 Days
• Field of Search: None
• US Class Current: 370/330
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 76/14 Direct-mode setup

Abstract

A wireless terminal receives peer to peer resource control information from a base station. The peer to peer resource control information is used by the wireless terminal in a peer to peer network to control transmission scheduling and/or resource utilization. The base station sends the control signals at a first rate which is slower than the rate at which wireless terminals make transmission decisions for traffic slots. During the intervals between receipt of the base station control signals, wireless terminals make transmission decisions with regard to multiple traffic segments. The decisions are also influenced based on peer to peer signaling occurring between the wireless terminals in the network for each traffic slot. Resource utilization feedback information is provided from the wireless terminal to the base station. Based on the feedback information the base station updates the resource utilization control information and sends updated resource utilization control signals to the wireless terminals.

Claims

1. A method of operating a wireless communications which supports peer to peer communications, the method comprising:

receiving control signals from a base station at a first rate, said control signals providing peer to peer communications resource control information to said wireless communications device, said control information including scheduling priority information indicating a peer to peer transmission priority to be used by said wireless communications device when making a traffic transmission decision; and

making peer to peer traffic transmission decisions, at a second rate which is faster than said first rate, based on peer to peer communications resource control information including said peer to peer transmission priority included in a control signal received from said base station and based on peer to peer traffic scheduling information, multiple peer to peer traffic transmission decisions being made based on said peer to peer transmission priority during a period of time prior to receiving another control signal from said base station indicating a new peer to peer transmission priority to be used by said wireless communications device.

2. The method of claim 1, wherein said scheduling priority information indicates a maximum portion of peer to peer transmission resources that said wireless communications device can use.

3. The method of claim 1, further comprising:

providing feedback information including traffic utilization statistics to the base station.

4. The method of claim 2, wherein said maximum portion is indicated as a percentage of total peer to peer transmission resources said wireless communications device is allowed to use.

5. The method of claim 1, wherein said control information included in said control signal received from the base station includes:

information indicating time resources, frequency resources, or time and frequency resources which may be used for peer to peer communications.

6. The method of claim 1, wherein making peer to peer traffic transmission decisions includes making a traffic transmission decision for a traffic transmission segment, the method further comprising:

prior to making a traffic transmission decision for the traffic transmission segment,

monitoring for transmission request responses from other peer devices corresponding to requests to transmit in said traffic transmission segment; and

wherein making a traffic transmission decision for the traffic transmission segment includes making said traffic transmission decision for said traffic transmission segment based on information included in said control signal received from said base station and transmission request responses detected by said monitoring.

7. The method of claim 3, further comprising:

providing, as part of said feedback information, information indicating a number of times the wireless communications device decided to yield and not transmit traffic signals in a peer to peer traffic segment based on at least one of an estimated interference or priority information.

8. A wireless communications device comprising:

means for receiving control signals from a base station at a first rate, said control signals providing peer to peer communications resource control information to said wireless communications device, said control information including scheduling priority information indicating a peer to peer transmission priority to be used by said wireless communications device when making a traffic transmission decision; and

means for making peer to peer traffic transmission decisions, at a second rate which is faster than said first rate, based on peer to peer communications resource control information including said peer to peer transmission priority included in a control signal received from said base station and based on peer to peer traffic

scheduling information, multiple peer to peer traffic transmission decisions being made based on said peer to peer transmission priority during a period of time prior to receiving another control signal from said base station indicating a new peer to peer transmission priority to be used by said wireless communications device.

9. The wireless communications device of claim 8, wherein said means for making peer to peer traffic transmission decisions bases its decisions on peer to peer transmission control information generated from signals received from peer devices at a rate which is faster than said first rate.

10. The wireless communications device of claim 8, wherein said control information included in said control signal received from the base station includes information indicating time resources, frequency resources, or time and frequency resources which may be used for peer to peer communications.

11. The wireless communications device of claim 8, wherein said scheduling priority information indicates a maximum portion of peer to peer transmission resources that said wireless communications device can use.

12. The wireless communications device of claim 11, wherein said maximum portion is indicated as a percentage of total peer to peer transmission resources said wireless communications device is allowed to use.

13. The wireless communications device of claim 8, wherein said means for making peer to peer traffic transmission decisions includes means for making a traffic transmission decision for a traffic transmission segment, said wireless communications device further comprising:

means for monitoring for transmission request responses from other peer devices corresponding to requests to transmit in said traffic transmission segment, prior to making a traffic transmission decision for the traffic transmission segment; and

wherein said means for making a traffic transmission decision for the traffic transmission segment includes means for making said traffic transmission decision for said traffic transmission segment based on information included in said control signal received from said base station and transmission request responses detected by said monitoring.

14. The wireless communications device of claim 8, further comprising:

means for providing feedback information including traffic utilization statistics to the base station.

15. A computer program product for use in a wireless communications device, the computer program product comprising:

a non-transitory computer readable medium comprising;

code for causing at least one computer to receive control signals from a base station at a first rate, said control signals providing peer to peer communications resource control information to said wireless communications device, said control information including scheduling priority information indicating a peer to peer transmission priority to be used by said wireless communications device when making a traffic transmission decision; and

code for causing said at least one computer to make peer to peer traffic transmission decisions at a second rate which is faster than said first rate, based on peer to peer communications resource control information including said peer to peer transmission priority included in a control signal received from said base station and based on peer to peer traffic scheduling information, multiple peer to peer traffic transmission decisions being made based on said peer to peer transmission priority during a period of time prior to receiving another control signal from said base station indicating a new peer to peer transmission priority to be used by said wireless communications device.

16. A wireless communications device comprising:

at least one processor configured to;

receive control signals from a base station at a first rate, said control signals providing peer to peer communications resource control information to said wireless communications device, said control information including scheduling priority information indicating a peer to peer transmission priority to be used by said wireless communications device when making a traffic transmission decision; and

make peer to peer traffic transmission decisions, at a second rate which is faster than said first rate, based on peer to peer communications resource control information including said peer to peer transmission priority included in a control signal received from said base station and based on peer to peer traffic scheduling information, multiple peer to peer traffic transmission decisions being made based on said peer to peer transmission priority during a period of time prior to receiving another control signal from said base station indicating a new peer to peer transmission priority to be used by said wireless communications device; and

memory coupled to said at least one processor.

17. The wireless communications device of claim 16, wherein said at least one processor is further configured to provide feedback information including traffic utilization statistics to the base station.

18. The wireless communication device of claim 16, wherein said control information included in said control signal received from the base station includes information indicating time resources, frequency resources, or time and frequency resources which may be used for peer to peer communications.

19. The wireless communications device of claim 17, wherein said scheduling priority information indicates a maximum portion of peer to peer transmission resources that said wireless communications device can use.

20. The wireless communications device of claim 19, wherein said maximum portion is indicated as a percentage of total peer to peer transmission resources said wireless communications device is allowed to use.