Half duplex techniques for wireless communications

1. A method of wireless communication, comprising at an originating user equipment:

determining a group of relaying user equipment (UEs) based, at least in part, on at least one type of identifying information received from and corresponding to each member of the group of relaying UEs;

selecting a sub-channel of multiple sub-channels for transmitting, over a time duration and to the group of relaying UEs, ultra-reliable quality-of-service (QoS) traffic, wherein other sub-channels of the multiple sub-channels are used for initial ultra-reliable QoS transmissions from one or more other transmitting UEs over the time duration; and

transmitting the ultra-reliable QoS traffic to the group of relaying UEs over the same time duration over the sub-channel.

2. The method of claim 1 , further comprising:

transmitting, to the group of relaying UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for transmitting the ultra-reliable QoS traffic;

receiving, from the group of relaying UEs, Respond-to-send (RSP) signals for transmitting the ultra-reliable QoS traffic;

wherein transmitting the ultra-reliable QoS traffic is based at least in part on determining that the selected sequence identifier in the RRQ signal is higher than an identifier associated with each of the RSP signals.

3. The method of claim 2 , wherein the selected sequence identifier is associated with a hierarchical position of a node in a network of transmitting UEs and relaying UEs.

4. The method of claim 2 , further comprising:

transmitting, to the group of relaying UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for transmitting the ultra-reliable QoS traffic,

wherein transmitting the ultra-reliable QoS traffic is based at least in part on determining that no Respond-to-send (RSP) signals are received in response to the RRQ.

5. The method of claim 1 , further comprising:

receiving, over a second sub-channel of the multiple sub-channels, ultra-reliable quality-of-service (QoS) traffic from one or more UEs over the same time duration; and

relaying, along with one or more other relaying UEs, the ultra-reliable QoS traffic over a subsequent time duration.

6. The method of claim 5 , further comprising:

transmitting, to another group of UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for relaying the ultra-reliable quality-of-service (QoS) traffic;

receiving, from the another group of UEs, Respond-to-send (RSP) signals for transmitting the ultra-reliable QoS traffic;

wherein relaying the ultra-reliable QoS traffic is based at least in part on determining that the selected sequence identifier in the RRQ signal is equal or higher than an identifier associated with each of the RSP signals.

7. The method of claim 6 , wherein the selected sequence identifier is associated with a hierarchical position of a node in a network of transmitting UEs and relaying UEs.

8. The method of claim 5 , further comprising:

transmitting, to another group of UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for relaying the ultra-reliable quality-of-service (QoS) traffic,

wherein relaying the ultra-reliable QoS traffic is based at least in part on determining that no Respond-to-send (RSP) signals are received in response to the RRQ.

9. An apparatus at an originating user equipment for wireless communication, comprising:

a transceiver;

a memory configured to store instructions; and

one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to:

determine a group of relaying user equipment (UEs) based, at least in part, on at least one type of identifying information received from and corresponding to each member of the group of relaying UEs;

select a sub-channel of multiple sub-channels for transmitting, over a time duration and to the group of relaying UEs, ultra-reliable quality-of-service (QoS) traffic, wherein other sub-channels of the multiple sub-channels are used for initial ultra-reliable QoS transmissions from one or more other transmitting UEs over the time duration; and

transmit the ultra-reliable QoS traffic to the group of relaying UEs in the same time duration over the sub-channel.

10. The apparatus of claim 9 , wherein the one or more processors are further configured to:

transmit, to the group of relaying UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for transmitting the ultra-reliable QoS traffic;

receive, from the group of relaying UEs, Respond-to-send (RSP) signals for transmitting the ultra-reliable QoS traffic;

wherein the one or more processors are further configured to transmit the ultra-reliable QoS traffic based at least in part on determining that the selected sequence identifier in the RRQ signal is higher than an identifier associated with each of the RSP signals.

11. The apparatus of claim 10 , wherein the selected sequence identifier is associated with a hierarchical position of a node in a network of transmitting UEs and relaying UEs.

12. The apparatus of claim 10 , wherein the one or more processors are further configured to:

transmit, to the group of relaying UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for transmitting the ultra-reliable QoS traffic,

wherein the one or more processors are configured to transmit the ultra-reliable QoS traffic based at least in part on determining that no Respond-to-send (RSP) signals are received in response to the RRQ.

13. The apparatus of claim 9 , wherein the one or more processors are further configured to:

receive, over a second sub-channel of the multiple sub-channels, ultra-reliable quality-of-service (QoS) traffic from one or more UEs over the same time duration; and

relay, along with one or more other relaying UEs, the ultra-reliable QoS traffic over a subsequent time duration.

14. The apparatus of claim 13 , wherein the one or more processors are further configured to:

transmit, to another group of UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for relaying the ultra-reliable quality-of-service (QoS) traffic;

receive, from the another group of UEs, Respond-to-send (RSP) signals for transmitting the ultra-reliable QoS traffic;

wherein the one or more processors are configured to relay the ultra-reliable QoS traffic based at least in part on determining that the selected sequence identifier in the RRQ signal is equal or higher than an identifier associated with each of the RSP signals.

15. The apparatus of claim 14 , wherein the selected sequence identifier is associated with a hierarchical position of a node in a network of transmitting UEs and relaying UEs.

16. The apparatus of claim 13 , wherein the one or more processors are further configured to:

transmit, to another group of UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for relaying the ultra-reliable quality-of-service (QoS) traffic,

wherein the one or more processors are configured to relay the ultra-reliable QoS traffic is based at least in part on determining that no Respond-to-send (RSP) signals are received in response to the RRQ.

17. An apparatus for use at an originating user equipment of wireless communication, comprising:

means for determining a group of relaying user equipment (UEs) based, at least in part, on at least one type of identifying information received from and corresponding to each member of the group of relaying UEs;

means for selecting a sub-channel of multiple sub-channels for transmitting, over a time duration and to the group of relaying UEs, ultra-reliable quality-of-service (QoS) traffic, wherein other sub-channels of the multiple sub-channels are used for initial ultra-reliable QoS transmissions from one or more other transmitting UEs in the time duration; and

means for transmitting the ultra-reliable QoS traffic to the group of relaying UEs over the same time duration over the sub-channel.

18. The apparatus of claim 17 , further comprising:

means for transmitting, to the group of relaying UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for transmitting the ultra-reliable QoS traffic;

means for receiving, from the group of relaying UEs, Respond-to-send (RSP) signals for transmitting the ultra-reliable QoS traffic;

wherein the means for transmitting the ultra-reliable QoS traffic is based at least in part on determining that the selected sequence identifier in the RRQ signal is higher than an identifier associated with each of the RSP signals.

19. The apparatus of claim 18 , wherein the selected sequence identifier is associated with a hierarchical position of a node in a network of transmitting UEs and relaying UEs.

20. The apparatus of claim 18 , further comprising:

means for transmitting, to the group of relaying UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for transmitting the ultra-reliable QoS traffic,

wherein the means for transmitting the ultra-reliable QoS traffic is based at least in part on determining that no Respond-to-send (RSP) signals are received in response to the RRQ.

21. The apparatus of claim 17 , further comprising:

means for receiving, over a second sub-channel of the multiple sub-channels, ultra-reliable quality-of-service (QoS) traffic from one or more UEs over the same time duration; and

means for relaying, along with one or more other relaying UEs, the ultra-reliable QoS traffic over a subsequent time duration.

22. The apparatus of claim 21 , further comprising:

means for transmitting, to another group of UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for relaying the ultra-reliable quality-of-service (QoS) traffic;

means for receiving, from the another group of UEs, Respond-to-send (RSP) signals for transmitting the ultra-reliable QoS traffic;

wherein the means for relaying the ultra-reliable QoS traffic is based at least in part on determining that the selected sequence identifier in the RRQ signal is equal or higher than an identifier associated with each of the RSP signals.

23. The apparatus of claim 22 , wherein the selected sequence identifier is associated with a hierarchical position of a node in a network of transmitting UEs and relaying UEs.

24. The apparatus of claim 21 , further comprising:

means for transmitting, to another group of UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for relaying the ultra-reliable quality-of-service (QoS) traffic,

means for wherein relaying the ultra-reliable QoS traffic is based at least in part on determining that no Respond-to-send (RSP) signals are received in response to the RRQ.

25. A non-transitory computer-readable medium, comprising code executable by one or more processors of an originating user equipment for wireless communications, the code comprising code for:

determining a group of relaying user equipment (UEs) based, at least in part, on at least one type of identifying information received from and corresponding to each member of the group of relaying UEs;

selecting a sub-channel of multiple sub-channels for transmitting, over a time duration and to the group of relaying UEs, ultra-reliable quality-of-service (QoS) traffic, wherein other sub-channels of the multiple sub-channels are used for initial ultra-reliable QoS transmissions from one or more other transmitting UEs in the time duration; and

transmitting the ultra-reliable QoS traffic to the group of relaying UEs over the same time duration over the sub-channel.

26. The non-transitory computer-readable medium of claim 25 , further comprising:

code for transmitting, to the group of relaying UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for transmitting the ultra-reliable QoS traffic;

code for receiving, from the group of relaying UEs, Respond-to-send (RSP) signals for transmitting the ultra-reliable QoS traffic;

wherein the code for transmitting the ultra-reliable QoS traffic is based at least in part on determining that the selected sequence identifier in the RRQ signal is higher than an identifier associated with each of the RSP signals.

27. The non-transitory computer-readable medium of claim 26 , further comprising:

code for transmitting, to the group of relaying UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for transmitting the ultra-reliable QoS traffic,

wherein the code for transmitting the ultra-reliable QoS traffic is based at least in part on determining that no Respond-to-send (RSP) signals are received in response to the RRQ.

28. The non-transitory computer-readable medium of claim 25 , further comprising:

code for receiving, over a second sub-channel of the multiple sub-channels, ultra-reliable quality-of-service (QoS) traffic from one or more UEs over the same time duration; and

code for relaying, along with one or more other relaying UEs, the ultra-reliable QoS traffic over a subsequent time duration.

29. The non-transitory computer-readable medium of claim 28 , further comprising:

code for transmitting, to another group of UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for relaying the ultra-reliable quality-of-service (QoS) traffic;

code for receiving, from the another group of UEs, Respond-to-send (RSP) signals for transmitting the ultra-reliable QoS traffic;

wherein the code for relaying the ultra-reliable QoS traffic is based at least in part on determining that the selected sequence identifier in the RRQ signal is equal or higher than an identifier associated with each of the RSP signals.

30. The non-transitory computer-readable medium of claim 28 , further comprising:

code for transmitting, to another group of UEs and based on a selected sequence identifier, a request-to-send (RRQ) signal for relaying the ultra-reliable quality-of-service (QoS) traffic,

code for wherein relaying the ultra-reliable QoS traffic is based at least in part on determining that no Respond-to-send (RSP) signals are received in response to the RRQ.

31. The method of claim 1 , wherein the at least one type of identifying information for at least one relaying UE in the group of relaying UEs comprises location information associated with the at least one relaying UE.

32. The apparatus of claim 9 , wherein the at least one type of identifying information for at least one relaying UE in the group of relaying UEs comprises location information associated with the at least one relaying UE.