Techniques for mixed numerology co-channel coexistence

1 . A wireless communication device, comprising:

one or more memories storing processor-executable code; and

one or more processors coupled with the one or more memories and operable to execute the code to cause the wireless communication device to:

transmit, in a radio frequency spectrum band that supports co-channel coexistence between a first radio access technology associated with a first subcarrier spacing and a second radio access technology associated with a second subcarrier spacing, during a first slot of two or more consecutive slots of a paired transmission that is configured to overlap with a subframe of the second radio access technology, a first redundancy version of a transport block that comprises a first set of parity bits and a first set of information bits associated with the transport block, wherein the first redundancy version is transmitted as part of the paired transmission and via the first radio access technology; and

transmit, in the radio frequency spectrum band, during a second slot of the two or more consecutive slots of the paired transmission that is configured to overlap with the subframe of the second radio access technology, a second redundancy version of the transport block that comprises a second set of parity bits and a second set of information bits associated with the transport block, wherein the second redundancy version is transmitted as part of the paired transmission and via the first radio access technology.

2 . The wireless communication device of claim 1 , wherein the one or more processors are further operable to execute the code to cause the wireless communication device to:

monitor one or more sidelink feedback channel resources for feedback information associated with the first redundancy version or the second redundancy version based at least in part on a mapping between the one or more sidelink feedback channel resources and sidelink shared channel resources used for transmission of the first redundancy version or the second redundancy version.

3 . The apparatus of claim 2 , wherein:

the one or more sidelink feedback channel resources correspond to sidelink shared channel resources used for transmission of the first redundancy version when feedback reporting is enabled for the first redundancy version; and

the one or more sidelink feedback channel resources correspond to sidelink shared channel resources used for transmission of the second redundancy version when feedback reporting is enabled for the second redundancy version.

4 . The apparatus of claim 1 , wherein a transmission order of the first redundancy version and the second redundancy version is based at least in part on a redundancy version cycling configuration of the wireless communication device.

5 . The wireless communication device of claim 1 , wherein the one or more processors are further operable to execute the code to cause the wireless communication device to:

disable paired transmissions in the radio frequency spectrum band based at least in part on a channel busy ratio (CBR) associated with the first radio access technology.

6 . The wireless communication device of claim 1 , wherein the one or more processors are further operable to execute the code to cause the wireless communication device to:

disable paired transmissions in the radio frequency spectrum band based at least in part on a channel busy ratio (CBR) associated with the second radio access technology.

7 . The wireless communication device of claim 6 , wherein the one or more processors are further operable to execute the code to cause the apparatus to:

obtain an indication of the CBR associated with the second radio access technology from a collocated device associated with the second radio access technology or from one or more channel measurements performed by the wireless communication device.

8 . The wireless communication device of claim 1 , wherein the one or more processors are further operable to execute the code to cause the wireless communication device to:

disable paired transmissions in the radio frequency spectrum band based at least in part on a ratio between traffic associated with the second radio access technology and traffic associated with the first radio access technology.

9 . The wireless communication device of claim 1 , wherein:

one of the two or more consecutive slots of the paired transmission includes sidelink feedback channel resources.

10 . The wireless communication device of claim 1 , wherein, to transmit the first redundancy version and the second redundancy version, the one or more processors are operable to execute the code to cause the wireless communication device to:

transmit the first redundancy version of the transport block using a first set of sidelink shared channel resources in the first slot; and

transmit the second redundancy version using a second set of sidelink shared channel resources in the second slot, wherein the second slot includes sidelink feedback channel resources.

11 . The wireless communication device of claim 1 , wherein, to transmit the first redundancy version and the second redundancy version, the one or more processors are operable to execute the code to cause the wireless communication device to:

transmit the first redundancy version of the transport block in the first slot using a first modulation and coding scheme (MCS); and

transmit the second redundancy version of the transport block in the second slot using a second MCS that is different from the first MCS, wherein the second slot includes sidelink feedback channel resources.

12 . The wireless communication device of claim 1 , wherein the one or more processors are further operable to execute the code to cause the wireless communication device to:

transmit, via sidelink control information (SCI), an indication that the first redundancy version and the second redundancy version are a part of the paired transmission from the wireless communication device.

13 . The wireless communication device of claim 1 , wherein the first redundancy version and the second redundancy version are a part of the paired transmission that includes one or more retransmissions of the transport block.

14 . The wireless communication device of claim 1 , wherein the second radio access technology comprises a Long Term Evolution (LTE) Vehicle to Everything (V2X) sidelink radio access technology and the first radio access technology comprises a New Radio (NR) V2X sidelink radio access technology.

15 . The wireless communication device of claim 1 , wherein the first subcarrier spacing is 30 kilohertz (kHz) and the second subcarrier spacing is 15 kHz.

16 . The wireless communication device of claim 1 , wherein:

the first slot and the second slot have a first duration that corresponds to the first subcarrier spacing associated with the first radio access technology; and

a second duration of the subframe corresponds to the second subcarrier spacing.

17 . The wireless communication device of claim 16 , wherein:

a first orthogonal frequency division multiplexing (OFDM) symbol of the first slot, the second slot, and the sub-frame are reserved for automatic gain control (AGC).

18 . A wireless communication device, comprising:

one or more memories storing processor-executable code; and

one or more processors coupled with the one or more memories and operable to execute the code to cause the wireless communication device to:

receive, in a radio frequency spectrum band that supports co-channel coexistence between a first radio access technology associated with a first subcarrier spacing and a second radio access technology associated with a second subcarrier spacing, during a first slot of two or more consecutive slots of a paired transmission that is configured to overlap with a subframe of the second radio access technology, a first redundancy version of a transport block that comprises a first set of parity bits and a first set of information bits associated with the transport block, wherein the first redundancy version is received as part of the paired transmission and via the first radio access technology; and

receive, in the radio frequency spectrum band, during a second slot of the two or more consecutive slots of the paired transmission that is configured to overlap with the subframe of the second radio access technology, a second redundancy version of the transport block that comprises a second set of parity bits and a second set of information bits associated with the transport block, wherein the second redundancy version is received as part of the paired transmission and via the first radio access technology.

19 . The wireless communication device of claim 18 , wherein the one or more processors are further operable to execute the code to cause the wireless communication device to:

transmit, via one or more sidelink feedback channel resources, feedback information associated with the first redundancy version or the second redundancy version based at least in part on a mapping between the one or more sidelink feedback channel resources and sidelink shared channel resources used for transmission of the first redundancy version or the second redundancy version.

20 . The wireless communication device of claim 19 , wherein:

the one or more sidelink feedback channel resources correspond to sidelink shared channel resources used for transmission of the first redundancy version when feedback reporting is enabled for the first redundancy version; and

the one or more sidelink feedback channel resources correspond to sidelink shared channel resources used for transmission of the second redundancy version when feedback reporting is enabled for the second redundancy version.

21 . The wireless communication device of claim 18 , wherein a transmission order of the first redundancy version and the second redundancy version is based at least in part on a redundancy version cycling configuration of the wireless communication device.

22 . The wireless communication device of claim 18 , wherein the one or more processors are further operable to execute the code to cause the wireless communication device to:

disable paired transmissions in the radio frequency spectrum band based at least in part on a channel busy ratio (CBR) associated with the first radio access technology.

23 . The wireless communication device of claim 18 , wherein the one or more processors are further operable to execute the code to cause the wireless communication device to:

disable paired transmissions in the radio frequency spectrum band based at least in part on a channel busy ratio (CBR) associated with the second radio access technology.

24 . The wireless communication device of claim 18 , wherein the one or more processors are further operable to execute the code to cause the wireless communication device to:

disable paired transmissions in the radio frequency spectrum band based at least in part on a ratio between traffic associated with the second radio access technology and traffic associated with the first radio access technology.

25 . The wireless communication device of claim 18 , wherein:

one of the two or more consecutive slots of the paired transmission includes sidelink feedback channel resources.

26 . The wireless communication device of claim 18 , wherein, to receive the first redundancy version and the second redundancy version, the one or more processors are operable to execute the code to cause the wireless communication device to:

receive the first redundancy version of the transport block using a first set of sidelink shared channel resources in the first slot; and

receive the second redundancy version using a second set of sidelink shared channel resources in the second slot, wherein the second slot includes sidelink feedback channel resources.

27 . The wireless communication device of claim 18 , wherein, to receive the first redundancy version and the second redundancy version, the one or more processors are operable to execute the code to cause the wireless communication device to:

receive the first redundancy version of the transport block in the first slot using a first modulation and coding scheme (MCS); and

receive the second redundancy version of the transport block in the second slot using a second MCS that is different from the first MCS, wherein the second slot includes sidelink feedback channel resources.

28 . The wireless communication device of claim 18 , wherein the one or more processors are further operable to execute the code to cause the wireless communication device to:

receive, via sidelink control information (SCI), an indication that the first redundancy version and the second redundancy version are a part of the paired transmission.

29 . A method for wireless communication at a wireless communication device, comprising:

transmitting, in a radio frequency spectrum band that supports co-channel coexistence between a first radio access technology associated with a first subcarrier spacing and a second radio access technology associated with a second subcarrier spacing, during a first slot of two or more consecutive slots of a paired transmission that is configured to overlap with a subframe of the second radio access technology, a first redundancy version of a transport block that comprises a first set of parity bits and a first set of information bits associated with the transport block, wherein the first redundancy version is transmitted as part of the paired transmission and via the first radio access technology; and

transmitting, in the radio frequency spectrum band, during a second slot of the two or more consecutive slots of the paired transmission that is configured to overlap with the subframe of the second radio access technology, a second redundancy version of the transport block that comprises a second set of parity bits and a second set of information bits associated with the transport block, wherein the second redundancy version is transmitted as part of the paired transmission and via the first radio access technology.

30 . A method for wireless communication at a wireless communication device, comprising:

receiving, in a radio frequency spectrum band that supports co-channel coexistence between a first radio access technology associated with a first subcarrier spacing and a second radio access technology associated with a second subcarrier spacing, during a first slot of two or more consecutive slots of a paired transmission that is configured to overlap with a subframe of the second radio access technology, a first redundancy version of a transport block that comprises a first set of parity bits and a first set of information bits associated with the transport block, wherein the first redundancy version is received as part of the paired transmission and via the first radio access technology; and

receiving, in the radio frequency spectrum band, during a second slot of the two or more consecutive slots of the paired transmission that is configured to overlap with the subframe of the second radio access technology, a second redundancy version of the transport block that comprises a second set of parity bits and a second set of information bits associated with the transport block, wherein the second redundancy version is received as part of the paired transmission and via the first radio access technology.