Methods and apparatus for supporting group communications with data re-transmission support
First Claim
1. A group communications method comprising:
- transmitting data to members of a group in a first signal directed to said group, at a lowest data rate of one or more data rates supported by the members of the group;
monitoring for acknowledgements from the members of the group indicating that said data was received;
transmitting a pilot signal in response to receiving the acknowledgements from less than all the members of the group; and
re-transmitting the data in a second signal directed to a subset of said group, said subset including members of the group from which acknowledgements were not received and excluding at least one member of the group from which an acknowledgement was received, wherein the retransmitting of the data is performed at a lowest one of data rates determined by link quality feedback information from the members of the subset of the group responsive to the pilot signal.
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Accused Products
Abstract
Methods and apparatus related to group communications in a wireless communications system, e.g., a peer to peer wireless communications system, are described. Methods and apparatus directed to 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, are described. 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 in a decentralized manner. Some features and/or aspects are directed to the use of individual group member acknowledgement signaling in response to a transmitted group traffic data signal. By monitoring for anticipated individual group member acknowledgment signals and identifying members which have not signaled a positive acknowledgment, re-transmission can be directed and/or tailored to a subset of the group.
118 Citations
35 Claims
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1. A group communications method comprising:
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transmitting data to members of a group in a first signal directed to said group, at a lowest data rate of one or more data rates supported by the members of the group; monitoring for acknowledgements from the members of the group indicating that said data was received; transmitting a pilot signal in response to receiving the acknowledgements from less than all the members of the group; and re-transmitting the data in a second signal directed to a subset of said group, said subset including members of the group from which acknowledgements were not received and excluding at least one member of the group from which an acknowledgement was received, wherein the retransmitting of the data is performed at a lowest one of data rates determined by link quality feedback information from the members of the subset of the group responsive to the pilot signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A communications device supporting group communications, the communications device comprising:
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a wireless transmitter module; a group signaling control module configured to control the wireless transmitter module to transmit data to members of a group in a first signal directed to said group, at a lowest data rate of one or more data rates supported by the members of the group; an acknowledgment monitoring module configured to monitor for acknowledgements from the members of the group indicating that said data was received; a re-transmission control module configured to control said wireless transmitter module to re-transmit the data in a second signal directed to a subset of said group, said subset including members of the group from which acknowledgements were not received and excluding at least one member of the group from which an acknowledgement was received; a pilot signaling module configured to transmit a pilot signal in response to receiving the acknowledgements from less than all the members of the group; and a re-transmission data rate determination module configured to determine the data rate to be used for the data to be re-transmitted as a function of link quality feedback information responsive to the pilot signal, as a lowest one of supported data rates corresponding to the members of the subset of the group. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A communications device supporting group communications, the communications device comprising:
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wireless transmitter means; group signaling control means for controlling the wireless transmitter means to transmit data to members of a group in a first signal directed to said group, at a lowest data rate of one or more data rates supported by the members of the group; acknowledgment monitoring means configured for monitoring for acknowledgements from the members of the group indicating that said data was received; re-transmission control means for controlling said wireless transmitter module to re-transmit the data in a second signal directed to a subset of said group, said subset including members of the group from which acknowledgements were not received and excluding at least one member of the group from which an acknowledgement was received; pilot signaling means for transmitting a pilot signal in response to receiving the acknowledgements from less than all the members of the group; and re-transmission data rate determination means for determining the data rate to be used for the data to be re-transmitted as a function of link quality feedback information responsive to the pilot signal, as a lowest one of supported data rates corresponding to the members of the subset of the group. - View Dependent Claims (30, 31, 32)
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33. A computer program product for use in a communications device to implement group communications, the computer program product comprising:
non-transitory computer readable medium comprising; code for causing a computer to transmit data to members of a group in a first signal directed to said group, at a lowest data rate of one or more data rates supported by the members of the group; code for causing a computer to monitor for acknowledgements from the members of the group indicating that said data was received; code for transmitting a pilot signal in response to receiving the acknowledgements from less than all the members of the group; and code for causing a computer to re-transmit the data in a second signal directed to a subset of said group, said subset including members of the group from which acknowledgements were not received and excluding at least one member of the group from which an acknowledgement was received, and wherein the retransmit of the data is performed at a data rate determined by link quality feedback information responsive to the pilot signal, as a lowest one of supported data rates corresponding to the members of the subset of the group. - View Dependent Claims (34, 35)
Specification