Multiple tri-state HARQ processes
Methods, systems, and devices are described for wireless communication. A transmitting device may send a signal including multiple transport blocks corresponding to multiple simultaneous hybrid automatic repeat request (HARQ) processes. Additional control information may be used to support the multiple simultaneous HARQ processes. For instance, the additional control information may indicate the number of available HARQ processes, an activity state for each HARQ process (e.g., active new data, active retransmission, or inactive), and the redundancy versions of each HARQ process. In some cases, the additional control information may be included in a downlink grant. A receiving device may respond with an acknowledgement or negative acknowledgment (ACK/NACK) for each of the transport blocks. The transmitting device may identify a retransmission status for each HARQ process based on the ACK/NACKs, and transmit new redundancy versions (or new data) to the receiving device.
1. A method of communication at a wireless device, comprising:
identifying for each of a plurality of hybrid automatic repeat request (HARQ) processes an active indication or an inactive indication, wherein each of the plurality of HARQ processes is associated with a plurality of transport blocks to be transmitted in a data signal during a first transmission time interval (TTI);
determining for HARQ processes of the plurality of HARQ processes associated with the active indication, a new transmission state or a retransmission state;
transmitting a control message for the data signal comprising the plurality of transport blocks to be transmitted during the first TTI, the control message comprising a plurality of HARQ process indications, wherein each HARQ process indication indicates one of the new transmission state or the retransmission state for each of the HARQ processes associated with the active indication; and
transmitting the data signal comprising the plurality of transport blocks during the first TTI, wherein each of the plurality of transport blocks corresponds to at least one of the new transmission state, the retransmission state or the inactive indication based at least in part on the control message.
2. The method of claim 1 , further comprising:
receiving a negative acknowledgement (NACK) for a transport block of the plurality of transport blocks; and
identifying a retransmission status for a HARQ process of the plurality of HARQ processes corresponding to the transport block, wherein the retransmission status comprises the retransmission state and a redundancy version.
3. The method of claim 2 , further comprising:
transmitting a second control message based at least in part on the retransmission status; and
transmitting a second data signal comprising a second plurality of transport blocks corresponding to the plurality of HARQ processes based at least in part on the second control message.
4. The method of claim 1 , wherein the retransmission state for at least one of the plurality of HARQ processes comprises a redundancy version.
5. The method of claim 1 , wherein the control message comprises a resource grant for the plurality of transport blocks.
6. The method of claim 1 , wherein each of the plurality of transport blocks utilizes a same modulation and coding scheme (MCS).
7. The method of claim 1 , further comprising:
identifying a first set of resources for a subset of the plurality of HARQ processes associated with retransmitted data.
8. The method of claim 7 , further comprising:
equally partitioning a second set of resources for the data signal between a second plurality of transport blocks containing new data.
9. A method of communication at a wireless device, comprising:
receiving a control message for a data signal comprising a plurality of transport blocks to be transmitted during a first transmission time interval (TTI), the control message comprising a plurality of HARQ process indications, wherein each HARQ process indication indicates one of a new transmission state or a retransmission state for each of a plurality of HARQ processes associated with an active indication and wherein each HARQ process indication is based at least in part on an identification of the active indication or an inactive indication for each of the plurality of HARQ processes; and
receiving the data signal comprising the plurality of transport blocks during the first TTI, wherein each of the plurality of transport blocks corresponds to at least one of the new transmission state, the retransmission state or an inactive indication based at least in part on the control message, wherein the new transmission state or the retransmission state are based at least in part on a determination for each of the plurality of HARQ processes associated with the active indication.
10. The method of claim 9 , further comprising:
transmitting a NACK for a transport block of the plurality of transport blocks.
11. The method of claim 10 , further comprising:
receiving a second control message;
identifying a retransmission status for a HARQ process of the plurality of HARQ processes corresponding to the transport block based at least in part on the second control message, wherein the retransmission status comprises the retransmission state and a redundancy version; and
receiving a second data signal comprising a second plurality of transport blocks corresponding to the plurality of HARQ processes based at least in part on the second control message.
12. The method of claim 9 , wherein the retransmission state for at least one of the plurality of HARQ processes comprises a redundancy version.
13. The method of claim 9 , wherein each of the plurality of transport blocks utilizes a same MCS.
14. An apparatus for communication at a wireless device, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory;
wherein the instructions are executable by the processor to:
identify for each of a plurality of hybrid automatic repeat request (HARQ) processes an active indication or an inactive indication, wherein each of the plurality of HARQ processes is associated with a plurality of transport blocks to be transmitted in a data signal during a first transmission time interval (TTI);
determining for HARQ processes of the plurality of HARQ processes associated with the active indication, a new transmission state or a retransmission state;
transmit a control message for the data signal comprising the plurality of transport blocks to be transmitted during the first TTI, the control message comprising a plurality of HARQ process indications, wherein each HARQ process indication indicates one of the new transmission state or the retransmission state for each of the HARQ processes associated with the active indication; and
transmit the data signal comprising the plurality of transport blocks during the first TTI, wherein each of the plurality of transport blocks corresponds to at least one of the HARQ processes associated with the active indication based at least in part on the control message.
15. The apparatus of claim 14 , wherein the instructions are executable by the processor to:
receive a negative acknowledgement (NACK) for a transport block of the plurality of transport blocks; and
identify a retransmission status for a HARQ process of the plurality of HARQ processes corresponding to the transport block, wherein the retransmission status comprises the retransmission state and a redundancy version.
16. The apparatus of claim 15 , wherein the instructions are executable by the processor to:
transmit a second control message based at least in part on the retransmission status; and
transmit a second data signal comprising a second plurality of transport blocks corresponding to the plurality of HARQ processes based at least in part on the second control message.
17. The apparatus of claim 14 , wherein the retransmission state for at least one of the plurality of HARQ processes comprises a redundancy version.
18. The apparatus of claim 14 , wherein the control message comprises a resource grant for the plurality of transport blocks.
19. The apparatus of claim 14 , wherein each of the plurality of transport blocks utilizes a same modulation and coding scheme (MCS).
20. The apparatus of claim 14 , wherein the instructions are executable by the processor to:
identify a first set of resources for a subset of the plurality of HARQ processes associated with retransmitted data.
21. The apparatus of claim 20 , wherein the instructions are executable by the processor to:
equally partition a second set of resources for the data signal between a second plurality of transport blocks containing new data.
22. An apparatus for communication at a wireless device, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory;
wherein the instructions are executable by the processor to:
receive a control message for a data signal comprising a plurality of transport blocks to be transmitted during a first transmission time interval (TTI), the control message comprising a plurality of HARQ process indications, wherein each HARQ process indication indicates one of a new transmission state or a retransmission state for each of a plurality of HARQ processes associated with an active indication and wherein each HARQ process indication is based at least in part on an identification of the active indication or an inactive indication for each of the plurality of HARQ processes; and
receive the data signal comprising the plurality of transport blocks during the first TTI, wherein each of the plurality of transport blocks corresponds to at least one of the new transmission state, the retransmissions state or an inactive indication based at least in part on the control message, wherein the new transmission state or the retransmission state are based at least in part on a determination for each of the plurality of HARQ processes associated with the active indication.
23. The apparatus of claim 22 , wherein the instructions are executable by the processor to:
transmit a NACK for a transport block of the plurality of transport blocks.
24. The apparatus of claim 23 , wherein the instructions are executable by the processor to:
receive a second control message;
identify a retransmission status for a HARQ process of the plurality of HARQ processes corresponding to the transport block based at least in part on the second control message, wherein the retransmission status comprises the retransmission state and a redundancy version; and
receive a second data signal comprising a second plurality of transport blocks corresponding to the plurality of HARQ processes based at least in part on the second control message.
25. The apparatus of claim 22 , wherein the retransmission state for at least one of the plurality of HARQ processes comprises a redundancy version.
26. The apparatus of claim 22 , wherein each of the plurality of transport blocks utilizes a same MCS.