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 for wireless communications at a wireless device, comprising:
receiving a control message comprising an indication of a state for each of a plurality of hybrid automatic repeat request (HARQ) processes; and
receiving a data signal comprising a plurality of transport blocks corresponding to the plurality of HARQ processes based at least in part on the control message.
2 . The method of claim 1 , further comprising:
transmitting a negative acknowledgement (NACK) for a transport block of the plurality of transport blocks.
3 . The method of claim 2 , 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 a retransmission indication 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.
4 . The method of claim 1 , wherein the state for each of the plurality of HARQ processes comprises a new data indication, a retransmission indication, or an inactive indication.
5 . The method of claim 1 , wherein the state for at least one of the plurality of HARQ processes comprises a redundancy version.
6 . The method of claim 1 , wherein the control message comprises a resource grant for the plurality of transport blocks.
7 . The method of claim 1 , wherein each of the plurality of transport blocks utilizes a same modulation and coding scheme (MCS).
8 . An apparatus for wireless communications at a wireless device, comprising:
a processor,
memory coupled with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
receive a control message comprising an indication of a state for each of a plurality of hybrid automatic repeat request (HARQ) processes; and
receive a data signal comprising a plurality of transport blocks corresponding to the plurality of HARQ processes based at least in part on the control message.
9 . The apparatus of claim 8 , wherein the instructions are further executable by the processor to cause the apparatus to:
transmit a negative acknowledgement (NACK) for a transport block of the plurality of transport blocks.
10 . The apparatus of claim 9 , wherein the instructions are further executable by the processor to cause the apparatus 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 a retransmission indication 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.
11 . The apparatus of claim 8 , wherein the state for each of the plurality of HARQ processes comprises a new data indication, a retransmission indication, or an inactive indication.
12 . The apparatus of claim 8 , wherein the state for at least one of the plurality of HARQ processes comprises a redundancy version.
13 . The apparatus of claim 8 , wherein the control message comprises a resource grant for the plurality of transport blocks.
14 . The apparatus of claim 8 , wherein each of the plurality of transport blocks utilizes a same modulation and coding scheme (MCS).
15 . An apparatus for wireless communications at a wireless device, comprising:
means for receiving a control message comprising an indication of a state for each of a plurality of hybrid automatic repeat request (HARQ) processes; and
means for receiving a data signal comprising a plurality of transport blocks corresponding to the plurality of HARQ processes based at least in part on the control message.
16 . The apparatus of claim 15 , further comprising:
means for transmitting a negative acknowledgement (NACK) for a transport block of the plurality of transport blocks.
17 . The apparatus of claim 16 , further comprising:
means for receiving a second control message;
means for 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 a retransmission indication and a redundancy version; and
means for 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.
18 . The apparatus of claim 15 , wherein the state for each of the plurality of HARQ processes comprises a new data indication, a retransmission indication, or an inactive indication.
19 . The apparatus of claim 15 , wherein the state for at least one of the plurality of HARQ processes comprises a redundancy version.
20 . The apparatus of claim 15 , wherein the control message comprises a resource grant for the plurality of transport blocks.
21 . The apparatus of claim 15 , wherein each of the plurality of transport blocks utilizes a same modulation and coding scheme (MCS).
22 . A non-transitory computer-readable medium storing code for wireless communications at a wireless device, the code comprising instructions executable by a processor to:
receive a control message comprising an indication of a state for each of a plurality of hybrid automatic repeat request (HARQ) processes; and
receive a data signal comprising a plurality of transport blocks corresponding to the plurality of HARQ processes based at least in part on the control message.
23 . The non-transitory computer-readable medium of claim 22 , wherein the instructions are further executable to:
transmit a negative acknowledgement (NACK) for a transport block of the plurality of transport blocks.
24 . The non-transitory computer-readable medium of claim 23 , wherein the instructions are further executable 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 a retransmission indication 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 non-transitory computer-readable medium of claim 22 , wherein the state for each of the plurality of HARQ processes comprises a new data indication, a retransmission indication, or an inactive indication.
26 . The non-transitory computer-readable medium of claim 22 , wherein the state for at least one of the plurality of HARQ processes comprises a redundancy version.
27 . The non-transitory computer-readable medium of claim 22 , wherein the control message comprises a resource grant for the plurality of transport blocks.
28 . The non-transitory computer-readable medium of claim 22 , wherein each of the plurality of transport blocks utilizes a same modulation and coding scheme (MCS).