Protocol overhead reduction

1 . An apparatus for wireless communication at a wireless device, comprising:

one or more processors;

one or more memories coupled with the one or more processors; and

instructions stored in the one or more memories and operable, when executed by the one or more processors, to cause the apparatus to:

receive a configuration for a data radio bearer and a first configured grant associated with voice traffic, wherein the first configured grant is configured with a first periodicity for a fixed transport block size of the voice traffic, and wherein a number of bytes of the fixed transport block size is based at least in part on a size of a robust header compression header associated with the voice traffic;

identify a mapping between a configured grant identifier of the first configured grant and the data radio bearer based at least in part on the configuration;

generate a transport block having a size that corresponds to the fixed transport block size and comprising the voice traffic based at least in part on the mapping between the configured grant identifier and the data radio bearer; and

transmit the generated transport block comprising the voice traffic in accordance with the first configured grant.

2 . The apparatus of claim 1 , wherein the instructions to generate the transport block are further operable, when executed by the one or more processors, to cause the apparatus to:

generate the transport block without including a service data adaptation protocol header, a radio link control header and a medium access control header in the transport block; and

generate a packet data convergence protocol header in the transport block.

3 . The apparatus of claim 2 , wherein the packet data convergence protocol header comprises a byte indicating a packet data convergence protocol sequence number length or a sequence number shared by a packet data convergence protocol layer associated with the wireless device and an application layer associated with the wireless device.

4 . The apparatus of claim 1 , wherein the instructions to identify the mapping are further operable, when executed by the one or more processors, to cause the apparatus to:

identify the mapping between one or more configured grant identifiers and the data radio bearer, wherein the one or more configured grant identifiers provide support for transmission of the voice traffic on the data radio bearer.

5 . The apparatus of claim 1 , wherein the configuration is associated with a codec rate of the voice traffic, a control frame associated with the voice traffic, or a combination thereof.

6 . The apparatus of claim 1 , wherein:

a second configured grant is configured with a second periodicity that is greater than the first periodicity; and

the second configured grant is used to transmit a buffer status report medium access control layer control element, a power headroom report medium access control layer control element, an interspersed robust header compression feedback, a timing advance medium access control layer control element, a second transport block comprising a segment of the voice traffic, or a combination thereof.

7 . The apparatus of claim 1 , wherein the apparatus is configured to communicate the voice traffic to a non-terrestrial network node.

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

receiving a configuration for a data radio bearer and a first configured grant associated with voice traffic, wherein the first configured grant is configured with a first periodicity for a fixed transport block size of the voice traffic, and wherein a number of bytes of the fixed transport block size is based at least in part on a size of a robust header compression header associated with the voice traffic;

identifying a mapping between a configured grant identifier of the first configured grant and the data radio bearer based at least in part on the configuration;

generating a transport block having a size that corresponds to the fixed transport block size and comprising the voice traffic based at least in part on the mapping between the configured grant identifier and the data radio bearer; and

transmitting the generated transport block comprising the voice traffic in accordance with the first configured grant.

9 . The method of claim 8 , wherein the generating of the transport block further comprises:

generating the transport block without including a service data adaptation protocol header, a radio link control header and a medium access control header in the transport block; and

generating a packet data convergence protocol header in the transport block.

10 . The method of claim 9 , wherein the packet data convergence protocol header comprises a byte indicating a packet data convergence protocol sequence number length or a sequence number shared by a packet data convergence protocol layer associated with the wireless device and an application layer associated with the wireless device.

11 . The method of claim 8 , wherein the identifying of the mapping further comprises:

identifying the mapping between one or more configured grant identifiers and the data radio bearer, wherein the one or more configured grant identifiers provide support for transmission of the voice traffic on the data radio bearer.

12 . The method of claim 8 , wherein the configuration is associated with a codec rate of the voice traffic, a control frame associated with the voice traffic, or a combination thereof.

13 . The method of claim 8 , wherein:

a second configured grant is configured with a second periodicity that is greater than the first periodicity; and

the second configured grant is used to transmit a buffer status report medium access control layer control element, a power headroom report medium access control layer control element, an interspersed robust header compression feedback, a timing advance medium access control layer control element, a second transport block comprising a segment of the voice traffic, or a combination thereof.

14 . A non-transitory computer-readable medium storing code for wireless communication at a wireless device, the code comprising instructions executable by one or more processors to:

receive a configuration for a data radio bearer and a first configured grant associated with voice traffic, wherein the first configured grant is configured with a first periodicity for a fixed transport block size of the voice traffic, and wherein a number of bytes of the fixed transport block size is based at least in part on a size of a robust header compression header associated with the voice traffic;

identify a mapping between a configured grant identifier of the first configured grant and the data radio bearer based at least in part on the configuration;

generate a transport block having a size that corresponds to the fixed transport block size and comprising the voice traffic based at least in part on the mapping between the configured grant identifier and the data radio bearer; and

transmit the generated transport block comprising the voice traffic in accordance with the first configured grant.

15 . The non-transitory computer-readable medium of claim 14 , wherein the instructions to generate the transport block are further executable by the one or more processors to:

generate the transport block without including a service data adaptation protocol header, a radio link control header and a medium access control header in the transport block; and

generate a packet data convergence protocol header in the transport block.

16 . The non-transitory computer-readable medium of claim 15 , wherein the packet data convergence protocol header comprises a byte indicating a packet data convergence protocol sequence number length or a sequence number shared by a packet data convergence protocol layer associated with the wireless device and an application layer associated with the wireless device.

17 . The non-transitory computer-readable medium of claim 14 , wherein the instructions to identify the mapping are further executable by the one or more processors to:

identify the mapping between one or more configured grant identifiers and the data radio bearer, wherein the one or more configured grant identifiers provide support for transmission of the voice traffic on the data radio bearer.

18 . The non-transitory computer-readable medium of claim 14 , wherein the configuration is associated with a codec rate of the voice traffic, a control frame associated with the voice traffic, or a combination thereof.