Method and apparatus for communicating transmission requests to members of a group and/or making group related transmission decisions

• US 8,694,662 B2
• Filed: 07/02/2008
• Issued: 04/08/2014
• Est. Priority Date: 07/10/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Wu, Xinzhou, Tavildar, Saurabh, Li, Junyi, Laroia, Rajiv
• Primary Examiner(s): BOUTAH, ALINA A
• Application Number:
  US12/166,594
• Publication Number:
  US 20090019113A1
• Time in Patent Office: 2,106 Days
• Field of Search: 709/204, 709/228, 709/230, 709/238, 370/230, 370/235, 370/245
• US Class Current: 709/230
• CPC Class Codes: H04L 12/1881 with schedule organisation, e.g. priority, sequence management
• CPC Class Codes: H04L 12/1886 with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Methods and apparatus supporting group communications in a peer to peer wireless network are described. Methods and apparatus are directed to implementations with closed groups, e.g., where the number of group members are fixed at a given time and known to one or more members of the group. Various embodiments are well suited to decentralized peer to peer wireless networks including a plurality of individual traffic resources, e.g., traffic slots and/or traffic segments, which may be independently scheduled. Approaches for implementing distributed scheduling for traffic air link resources which may carry group traffic signals and/or peer to peer traffic signals are described. Various aspects are directed to the transmitter side including: group traffic transmission request transmissions, reception of request response signaling, transmitter yielding decisions, group rate determination and/or group traffic data signaling. Other aspects are directed to the receiver side including: reception of group traffic transmission request signals, receiver yielding decisions, transmitting group request responses signals, and/or receiving group traffic signaling.

Claims

1. A method of operating a first peer-to-peer communications device to implement group communications, comprising:

transmitting a first plurality of transmission requests corresponding to multiple connections, said first plurality of transmission requests corresponding to a first data transmission block comprising a traffic segment configured to carry traffic signals including group-cast traffic signals for a communications group, individual ones of said multiple connections being between said first peer to peer communications device and other peer-to-peer communications devices in the communications group; and

transmitting data to said other peer-to-peer communications devices in said first data transmission block based in part on signals received from at least one of the other peer-to-peer communications devices in the communications group.

2. The method of claim 1, wherein said first plurality of transmission requests is transmitted in a first transmission request block.

3. The method of claim 1, further comprising:

prior to transmitting data, making a decision whether or not to transmit in said first data transmission block based on signals received from non-group member peer-to-peer devices, said decision being a decision to transmit.

4. The method of claim 3, further comprising:

transmitting a second plurality of transmission requests corresponding to said multiple connections, said second plurality of transmission requests corresponding to a second data transmission block; and

making a decision whether or not to transmit data in said second data transmission block based on signals received from non-group member peer-to-peer devices.

5. The method of claim 4, wherein making a decision whether or not to transmit data in said second transmission block includes:

determining whether or not to transmit in said second data transmission block, as a function of the received power level of a transmission request response corresponding to a non-group member connection which has a higher priority than the highest priority connection of said multiple connections.

6. The method of claim 5, wherein when said determination determines not to transmit in said second data transmission block, refraining from transmitting in said second data transmission block.

7. The method of claim 2, further comprising:

transmitting subsequent to transmission of said first plurality of transmission requests, a pilot signal; and

receiving, prior to transmitting data in said first data transmission block, a plurality of channel quality feedback signals from different members of said group.

8. The method of claim 7, further comprising:

determining a data transmission rate to be used for transmission of data in said first data transmission block from said plurality of channel quality feedback signals.

9. The method of claim 8, wherein determining a data transmission rate includes selecting a data transmission rate which can be supported by a connection having the worst channel conditions indicated by said received channel quality feedback signals.

10. The method of claim 1, further comprising:

transmitting a second plurality of transmission requests corresponding to said multiple connections, said second plurality of transmission requests corresponding to a second data transmission block; and

making a decision whether or not to transmit data in said second transmission block based on the number of responses received from group members.

11. A peer-to-peer communications device supporting group communications, the first communications device comprising:

a wireless transmitter;

a transmission request control module configured to control said wireless transmitter to transmit a plurality of transmission requests corresponding to multiple connections, said plurality of transmission requests corresponding to a data transmission block comprising a traffic segment configured to carry traffic signals including group-cast traffic signals for a communications group, individual ones of said multiple connections being between said peer to peer communications device and other peer-to-peer communications devices in the communications group; and

a data transmission control module configured to control said wireless transmitter to transmit data to said other peer-to-peer communications devices in said data transmission block based in part on signals received from at least one of the other peer-to-peer communications devices in the communications group.

12. The peer-to-peer communications device of claim 11, wherein said plurality of transmission requests is transmitted in a transmission request block.

13. The peer-to-peer communications device of claim 11,

a receiver for receiving signals;

and

a transmission decision module configured to make a decision whether or not to transmit in said data transmission block based on signals received from non-group member peer-to-peer devices.

14. The peer-to-peer communications device of claim 13, wherein said transmission decision module determines whether or not to transmit in said data transmission block, as a function of the received power level of transmission request responses corresponding to non-group member connections which are received and have a higher priority than a highest priority connection of said multiple connections.

15. The peer-to-peer communications device of claim 14, wherein said data transmission control module is configured to be responsive to said transmission decision module and controls said transmitter to refrain from transmitting in said data transmission block when said transmission decision module makes a decision not to transmit in said data transmission block.

16. The peer-to-peer communications device of claim 12, further comprising:

a pilot signal transmission control module for controlling said transmitter to transmit, subsequent to transmission of said plurality of transmission requests, a pilot signal; and

a receiver configured to receive, prior to transmission by said transmitter of data in said data transmission block, a plurality of channel quality feedback signals from different members of said group.

17. The peer-to-peer communications device of claim 16, further comprising:

a transmission rate determination module configured to determine a data transmission rate, to be used for transmission of data in said data transmission block, based on said plurality of channel quality feedback signals.

18. A peer-to-peer communications device supporting group communications, the first communications device comprising:

means for transmitting signals;

means for controlling said means for transmitting signals to transmit a plurality of transmission requests corresponding to multiple connections, said plurality of transmission requests corresponding to a data transmission block comprising a traffic segment configured to carry traffic signals including group-cast traffic signals for a communications group, individual ones of said multiple connections being between said first peer to peer communications device and other peer-to-peer communications devices in the communications group; and

means for controlling said means for transmitting signals to transmit data to said other peer-to-peer communications devices in said data transmission block based in part on signals received from at least one of the other peer-to-peer communications devices in the communications group.

19. The peer-to-peer communications device of claim 18, wherein said plurality of transmission requests is transmitted in a transmission request block.

20. The peer-to-peer communications device of claim 18, further comprising:

means for receiving signals; and

means for making a decision whether or not to transmit in said data transmission block based on signals received from non-group member peer-to-peer devices.

21. A computer program product for use in a first peer-to-peer communications device to implement group communications, the computer program product comprising:

non-transitory computer readable medium comprising;

code for causing a computer to transmit a first plurality of transmission requests corresponding to multiple connections, said first plurality of transmission requests corresponding to a first data transmission block comprising a traffic segment configured to carry traffic signals including group-cast traffic signals for a communications group, individual ones of said multiple connections being between said first peer to peer communications device and other peer-to-peer communications devices in the communications group; and

code for causing a computer to transmit data to said other peer-to-peer communications devices in said first data transmission block based in part on signals received from at least one of the other peer-to-peer communications devices in the communications group.