CN-122003825-A - Adaptation to status protocol data units

Abstract

Methods, systems, and devices for wireless communications are described. A User Equipment (UE) may receive a Radio Link Control (RLC) Protocol Data Unit (PDU) within a receive window. Additionally, the UE may receive an uplink grant indicating a set of resources. Based on the set of resources, the UE may transmit a STATUS PDU including a single field indicating a Sequence Number (SN) of a first PDU received by the UE within a receive window but not successfully decoded. Alternatively, the UE may send STATUS PDU segments based on which PDUs the UE receives and the number of resources in the uplink grant. In some cases, the UE may transmit a STATUS PDU including a first field indicating an SN of a first PDU received by the UE within a reception window but not successfully decoded, and one or more offset fields indicating an SN of a corresponding PDU following the first PDU.

Inventors

• S. Erazoni
• O. Oztuko
• G.B. Horn
• L.WANG
• V. Darmia
• G. Slade Haran

Assignees

• 高通股份有限公司

Dates

Publication Date

20260508

Application Date

20240920

Priority Date

20231024

Claims (20)

1. 1. An apparatus for wireless communication at a User Equipment (UE), the apparatus comprising: one or more memories, and One or more processors coupled with the one or more memories and configured to cause the UE to: Receiving one or more radio link control protocol data units associated with a radio link control layer within a receive window; Receiving an uplink grant associated with the radio link control layer, wherein the uplink grant indicates a set of resources, and Based at least in part on the set of resources, a first radio link control state protocol data unit is transmitted according to a first type of state protocol data unit comprising a single field, wherein the single field of the first radio link control state protocol data unit indicates a sequence number of a first radio link control protocol data unit that was not successfully decoded within the receive window.
2. 2. The apparatus of claim 1, wherein the transmission of the first radio link control state protocol data unit according to the first type of state protocol data unit is based at least in part on a size of the set of resources indicated in the uplink grant.
3. 3. The apparatus of claim 1, wherein the single field indicates a negative acknowledgement for the first radio link control state protocol data unit.
4. 4. The apparatus of claim 1, wherein a number of sequence numbers between a start of the receive window and the sequence number of the first radio link control protocol data unit indicates one or more radio link control protocol data units preceding the UE successfully received the first radio link control protocol data unit within the receive window.
5. 5. The apparatus of claim 1, wherein the first radio link control status protocol data unit indicates a control protocol data unit type field, wherein the control protocol data unit type field indicates the first type of status protocol data unit.
6. 6. The apparatus of claim 1, wherein the one or more processors are configured to cause the UE to: A retransmission of a subset of the one or more radio link control protocol data units is received within the receive window based at least in part on the transmission of the first radio link control state protocol data unit.
7. 7. The apparatus of claim 1, wherein to receive the uplink grant, the one or more processors are configured to cause the UE to: Receiving an indication of two or more poll bits via the uplink grant, wherein values of the two or more poll bits indicate the first type of status protocol data unit, and The first radio link control state protocol data unit is transmitted based at least in part on the values of the two or more poll bits.
8. 8. The apparatus of claim 1, wherein the one or more processors are configured to cause the UE to: transmitting a second radio link control state protocol data unit comprising feedback for the one or more radio link control state protocol data units prior to transmission of the first radio link control state protocol data unit, wherein transmission of the first radio link control state protocol data unit is based at least in part on a transmission failure of the second radio link control state protocol data unit.
9. 9. The apparatus of claim 1, wherein the one or more processors are configured to cause the UE to: a timer is initiated after transmission of the first radio link control state protocol data unit, wherein transmission of a subsequent radio link control state protocol data unit is based at least in part on expiration of the timer.
10. 10. An apparatus for wireless communication at a User Equipment (UE), the apparatus comprising: one or more memories, and One or more processors coupled with the one or more memories and configured to cause the UE to: Receiving one or more radio link control protocol data units associated with a radio link control layer within a receive window; After receipt of the one or more radio link control protocol data units, receiving a first uplink grant associated with the radio link control layer, wherein the first uplink grant indicates a first set of resources; transmitting a first radio link control state protocol data unit comprising feedback for a first radio link control protocol data unit within the receive window based at least in part on the first set of resources, wherein the first radio link control state protocol data unit comprises a first field indicating a sequence number of the first radio link control protocol data unit; Receiving one or more additional radio link control protocol data units within the receive window after transmission of the first radio link control state protocol data unit, and After receipt of the one or more additional radio link control protocol data units, a second radio link control state protocol data unit comprising feedback for a second radio link control protocol data unit within the receive window is transmitted, wherein the second radio link control state protocol data unit comprises a second field corresponding to a sequence number of a second radio link control protocol data unit within the receive window and following the first radio link control protocol data unit, and comprises a third field indicating a sequence number corresponding to a radio link control protocol data unit following the one or more additional radio link control protocol data units.
11. 11. The apparatus of claim 10, wherein the sending of the first and second radio link control state protocol data units is based at least in part on a size of the first set of resources indicated in the first uplink grant.
12. 12. The apparatus of claim 10, wherein the first field indicates a negative acknowledgement for the first radio link control protocol data unit and the second field indicates a negative acknowledgement for the second radio link control protocol data unit.
13. 13. The apparatus of claim 10, wherein the third field indicates an acknowledgement for a third radio link state protocol data unit corresponding to a highest protocol data unit sequence number of the received one or more additional radio link control protocol data units.
14. 14. The apparatus of claim 10, wherein the one or more processors are configured to cause the UE to: Receiving a second uplink grant indicating a second set of resources after receipt of the one or more additional radio link control protocol data units, and The second radio link control state protocol data unit is transmitted based at least in part on the second set of resources.
15. 15. The apparatus of claim 10, wherein the first radio link control state protocol data unit comprises one or more segment information fields and one or more segment offset fields to indicate a subset of the one or more radio link control protocol data units.
16. 16. An apparatus for wireless communication at a User Equipment (UE), the apparatus comprising: one or more memories, and One or more processors coupled with the one or more memories and configured to cause the UE to: Receiving one or more radio link control protocol data units associated with a radio link control layer within a receive window; Receiving an uplink grant associated with the radio link control layer, wherein the uplink grant indicates a set of resources, and Transmitting, based at least in part on the set of resources, a first radio link control state protocol data unit comprising feedback for a first subset of radio link control protocol data units within the receive window, wherein the first radio link control state protocol data unit comprises a first field corresponding to a sequence number of a first radio link control protocol data unit and one or more offset fields indicating a respective offset corresponding to a sequence number of a respective radio link control protocol data unit following the first radio link control protocol data unit.
17. 17. The apparatus of claim 16, wherein the transmission of the first radio link control state protocol data unit is based at least in part on a size of the set of resources indicated in the uplink grant.
18. 18. The apparatus of claim 16, wherein the first field and the one or more offset fields indicate respective negative acknowledgements for the first radio link control protocol data unit and the respective radio link control protocol data unit.
19. 19. The apparatus of claim 16, wherein the first radio link control state protocol data unit comprises a second field indicating a number of bits for each of the one or more offset fields.
20. 20. The apparatus of claim 19, wherein the one or more processors are configured to cause the UE to: The number of bits is determined based at least in part on a size of the receive window and a type of the first radio link control state protocol data unit.

Description

Adaptation to status protocol data units Cross reference This patent application claims the benefit of U.S. patent application Ser. No. 18/493,759, entitled "ADAPTATIONS TO STATUS PROTOCOL DATA UNITS (adaptation to State protocol data Unit)" filed by ELAZZOUNI et al at 10/24 of 2023, which is assigned to the assignee of the present application and expressly incorporated herein by reference. Introduction to the invention The following relates generally to wireless communications, and more particularly to STATUS of adaptation Protocol Data Units (PDUs). Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems, such as Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems, or LTE-a Pro systems, and fifth generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems may employ techniques such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal FDMA (OFDMA), or discrete fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communication system may include one or more base stations, each supporting wireless communication for communication devices, which may be referred to as User Equipment (UEs). Disclosure of Invention The described technology relates to improved methods, systems, devices, and apparatuses that support adaptation of STATUS PDUs. A method for wireless communication by a User Equipment (UE) is described. The method may include receiving one or more RLC PDUs associated with an RLC layer within a receive window, receiving an uplink grant associated with the RLC layer, wherein the uplink grant indicates a set of resources, and transmitting a first RLC STATUS PDU according to a first type of STATUS PDU comprising a single field based on the set of resources, wherein the single field of the first RLC STATUS PDU indicates an SN of the first RLC PDU that was not successfully decoded within the receive window. An apparatus for wireless communication at a UE is described. The apparatus can include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured to cause the UE to receive one or more RLC PDUs associated with an RLC layer within a receive window, receive an uplink grant associated with the RLC layer, wherein the uplink grant indicates a set of resources, and transmit a first RLC STATUS PDU according to a first type of STATUS PDU comprising a single field based on the set of resources, wherein the single field of the first RLC STATUS PDU indicates an SN of the first RLC PDU that was not successfully decoded within the receive window. Another apparatus for wireless communication at a UE is described. The apparatus may include means for receiving one or more RLC PDUs associated with an RLC layer within a reception window, means for receiving an uplink grant associated with the RLC layer, wherein the uplink grant indicates a set of resources, and means for transmitting a first RLC STATUS PDU according to a first type of STATUS PDU comprising a single field based on the set of resources, wherein the single field of the first RLC STATUS PDU indicates an SN of the first RLC PDU that was not successfully decoded within the reception window. A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by one or more processors to cause a UE to receive one or more RLC PDUs associated with an RLC layer within a receive window, receive an uplink grant associated with the RLC layer, wherein the uplink grant indicates a set of resources, and transmit a first RLC STATUS PDU according to a first type of STATUS PDU comprising a single field based on the set of resources, wherein the single field of the first RLC STATUS PDU indicates an SN of the first RLC PDU that was not successfully decoded within the receive window. Some examples of the methods, UEs, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions to transmit the first RLC STATUS PDU in accordance with the first type of STATUS PDU may be based on the size of the set of resources indicated in the uplink grant. In some examples of the methods, UEs, and non-transitory computer-readable media described herein, the single field indicates a NACK for the first RLC STATUS PDU. In some examples of the methods, UEs, and non-transitory computer-readable media described herein, the number of SNs between the start of the receive window