Radio link control for mixed numerology standalone carrier aggregation

1 . A wireless communication device for wireless communication, comprising:

one or more memories; and

one or more processors, coupled to the one or more memories, configured to:

establish a first set of carriers of a carrier aggregation (CA) configuration, wherein the first set of carriers is associated with a first configuration;

establish a second set of carriers of the CA configuration, wherein the second set of carriers is associated with a second configuration;

receive information indicating a first set of radio link control (RLC) parameters for the first configuration and a second set of RLC parameters for the second configuration;

perform a first RLC function for a first communication on the first set of carriers, using the first set of RLC parameters, wherein the first RLC function is a first reassembly function based at least in part on a first subset of sequence numbers (SNs) of a set of SNs, and wherein the first subset of SNs is associated with the first configuration;

perform a second RLC function for a second communication on the second set of carriers, using the second set of RLC parameters, wherein the second RLC function is a second reassembly function based at least in part on a second subset of SNs of the set of SNs, and wherein the second subset of SNs is associated with the second configuration;

initiate an RLC protocol data unit (PDU) recovery process for the first set of carriers, while a reassembly timer for the second set of carriers runs, based on a determination that a reassembly timer for the first set of carriers has expired and the reassembly timer for the second set of carriers has not elapsed, and in response to transmission of a status report that:

indicates a negative acknowledgment for the first set of carriers, and

indicates an unavailable status for the second set of carriers.

2 . The wireless communication device of claim 1 ,

wherein the one or more processors are further configured to perform a PDCP function for the first communication and the second communication.

3 . The wireless communication device of claim 2 ,

wherein the PDCP function for the first communication and the second communication is associated with by a single PDCP entity.

4 . The wireless communication device of claim 1 ,

wherein the one or more processors, to establish the first set of carriers, are configured to establish a first RLC entity associated with the first configuration, and wherein the one or more processors, to establish the second set of carriers, are configured to establish a second RLC entity associated with the second configuration.

5 . The wireless communication device of claim 4 ,

wherein the first RLC function for the first communication is associated with a first RLC entity and the second RLC function for the second communication is associated with the second RLC entity.

6 . The wireless communication device of claim 4 ,

wherein the one or more processors are further configured to:

communicate a packet data convergence protocol (PDCP) control PDU on a selected RLC entity of the first RLC entity and the second RLC entity.

7 . The wireless communication device of claim 4 ,

wherein traffic of the first communication or the second communication is configured to be split between the first RLC entity and the second RLC entity.

8 . The wireless communication device of claim 1 ,

wherein the RLC function is in parallel for the first set of carriers and for the second set of carriers.

9 . The wireless communication device of claim 1 ,

wherein the first communication or the second communication is via a radio bearer, wherein the radio bearer is at least one of a data radio bearer or a signaling radio bearer.

10 . The wireless communication device of claim 9 ,

wherein the first communication and the second communication are via the radio bearer.

11 . The wireless communication device of claim 9 ,

wherein the one or more processors are further configured to:

establish a third set of carriers of the CA configuration, wherein the third set of carriers is associated with a third configuration; and

perform a third RLC function for a third communication on the third set of carriers using a third set of RLC parameters, wherein the third communication is associated with the radio bearer.

12 . The wireless communication device of claim 1 ,

wherein the first RLC function and the second RLC function are associated with one of an acknowledged mode or an unacknowledged mode.

13 . The wireless communication device of claim 1 ,

wherein the first RLC function is based at least in part on an RLC PDU, and wherein the RLC PDU includes a field indicating whether the RLC PDU is associated with the first configuration.

14 . The wireless communication device of claim 1 ,

wherein the one or more processors are further configured to:

transmit a status report for an RLC PDU based at least in part on whether the RLC PDU is associated with a selected subset of SNs of the first subset of SNs or the second subset of SNs, wherein the status report is specific to a configuration associated with the selected subset of SNs, and wherein the status report is based at least in part on a poll message associated with the configuration or a reassembly timer associated with the configuration.

15 . The wireless communication device of claim 1 ,

wherein the one or more processors are further configured to:

transmit a status report for an RLC PDU received on the first set of carriers, wherein the status report indicates that a status for the second set of carriers is unavailable.

16 . The wireless communication device of claim 15 ,

wherein the status report for the RLC PDU indicates a negative acknowledgment for the RLC PDU while a reassembly timer for the second set of carriers is active, wherein the status report indicates that the status for the second set of carriers is unavailable based at least in part on the reassembly timer for the second set of carriers being active, wherein the status report indicates an acknowledgment for all RLC PDUs received on the first set of carriers, and wherein the one or more processors are further configured to:

perform a reassembly function associated with the RLC PDU.

17 . The wireless communication device of claim 16 ,

wherein the one or more processors are further configured to:

transmit, after the reassembly timer has elapsed, another status report indicating a negative acknowledgment for the second set of carriers, wherein, if all RLC PDUs on the second set of carriers are successfully received, an acknowledgement for all RLC PDUs on the second set of carriers is configured to be transmitted based at least in part on a poll associated with the second set of carriers.

18 . The wireless communication device of claim 15 ,

wherein the status report includes a first field that indicates whether a negative acknowledgment field is included in the status report, and further includes a fourth field that indicates whether a second field and a third field in the status report are associated with the negative acknowledgment or with the unavailable status indication.

19 . The wireless communication device of claim 15 ,

wherein the status report indicates an acknowledgment for all sequence numbers, associated with the second set of carriers, except sequence numbers that are unavailable or negatively acknowledged, up to a highest acknowledged sequence number.

20 . The wireless communication device of claim 1 ,

wherein the one or more processors are further configured to:

transmit a status report for an RLC PDU, wherein the status report includes, for at least one of the first set of carriers or the second set of carriers, one or more negative acknowledgments, one or more acknowledgments, and an indication that a status is unavailable.

21 . The wireless communication device of claim 1 ,

wherein the first configuration or the second configuration indicates at least one of:

a duplexing configuration,

a scheduling delay,

a numerology,

a frequency range, or

an uplink/downlink slot allocation.

22 . A user equipment (UE) for wireless communication, comprising:

a memory; and

one or more processors, coupled to the memory, configured to:

establish a first set of carriers of a carrier aggregation (CA) configuration, wherein the first set of carriers is associated with a first configuration and a first subset of sequence numbers (SNs) of a set of SNs;

establish a second set of carriers of the CA configuration, wherein the second set of carriers is associated with a second configuration and a second subset of SNs of the set of SNs;

transmit, based at least in part on a reassembly timer of the first set of carriers, a status report,

wherein the status report indicates a negative acknowledgment for the first set of carriers based at least in part on expiry of the reassembly timer for the first set of carriers while a reassembly timer for the second set of carriers has not elapsed, and

wherein the status report indicates an unavailable status for the second set of carriers based at least in part on the reassembly timer for the second set of carriers having not elapsed; and

initiate an RLC PDU recovery process for the first set of carriers while the reassembly timer for the second set of carriers has not elapsed.

23 . The UE of claim 22 ,

wherein the one or more processors are further configured to:

transmit, after the reassembly timer for the second set of carriers has elapsed, another status report indicating a negative acknowledgment for the second set of carriers based at least in part on failing to receive one or more RLC PDUs on the second set of carriers within the reassembly timer for the second set of carriers, wherein, if all RLC PDUs on the second set of carriers are successfully received, an acknowledgement for all RLC PDUs on the second set of carriers is configured to be transmitted based at least in part on a poll associated with the second set of carriers.

24 . The UE of claim 22 ,

wherein the status report includes a field distinguishing whether the status report indicates a negative acknowledgment or a status being unavailable.

25 . The UE of claim 22 ,

wherein the status report indicates an acknowledgment for all sequence numbers of the second subset of SNs, associated with the second set of carriers, except sequence numbers that are unavailable or negatively acknowledged, up to a highest acknowledged sequence number.

26 . The UE of claim 22 ,

wherein the status report includes, for at least one of the first set of carriers or the second set of carriers, one or more negative acknowledgments, one or more acknowledgments, and an indication that a status is unavailable.

27 . A method of wireless communication performed by a wireless communication device, comprising:

establishing a first set of carriers of a carrier aggregation (CA) configuration, wherein the first set of carriers is associated with a first configuration;

establishing a second set of carriers of the CA configuration, wherein the second set of carriers is associated with a second configuration;

receiving information indicating a first set of radio link control (RLC) parameters for the first configuration and a second set of RLC parameters for the second configuration;

performing a first RLC function for a first communication on the first set of carriers using the first set of RLC parameters, wherein the first RLC function is a first reassembly function based at least in part on a first subset of sequence numbers (SNs) of a set of SNs, and wherein the first subset of SNs is associated with the first configuration;

performing a second RLC function for a second communication on the second set of carriers using the second set of RLC parameters, wherein the second RLC function is a second reassembly function based at least in part on a second subset of SNs of the set of SNs, and wherein the second subset of SNs is associated with the second configuration; and

initiating an RLC protocol data unit (PDU) recovery process for the first set of carriers, while a reassembly timer for the second set of carriers runs, based on based on a determination that a reassembly timer for the first set of carriers has expired and the reassembly timer for the second set of carriers has not elapsed, and in response to transmitting a status report that:

indicates a negative acknowledgment for the first set of carriers, and

indicates an unavailable status for the second set of carriers.

28 . A method of wireless communication performed by a user equipment (UE), comprising:

establishing a first set of carriers of a carrier aggregation (CA) configuration, wherein the first set of carriers is associated with a first configuration and a first subset of sequence numbers (SNs) of a set of SNs;

establishing a second set of carriers of the CA configuration, wherein the second set of carriers is associated with a second configuration and a second subset of SNs of the set of SNs;

transmitting, based at least in part on a reassembly timer of the first set of carriers, a status report,

wherein the status report indicates a negative acknowledgment for the first set of carriers based at least in part on expiry of the reassembly timer for the first set of carriers while a reassembly timer for the second set of carriers has not elapsed, and

wherein the status report indicates an unavailable status for the second set of carriers based at least in part on the reassembly timer for the second set of carriers having not elapsed; and

initiating an RLC PDU recovery process for the first set of carriers while the reassembly timer for the second set of carriers runs.

29 . The method of claim 28 ,

wherein the status report includes a first field that indicates whether a negative acknowledgment field is included in the status report, and further includes a fourth field that indicates whether a second field and a third field in the status report are associated with the negative acknowledgment or with the unavailable status indication.

30 . The method of claim 29 ,

wherein the negative acknowledgment field identifies a SN from the first subset of SNs corresponding to a missing RLC PDU, wherein the second field indicates whether a segment offset field is included in the status report, and wherein the third field indicates a number of consecutive RLC data units that were not received, beginning from the SN identified by the negative acknowledgment field.