# US 2021/0243643 A1 · Self-reportable radio link control status protocol data units > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243643 A1 - Document ID: US20210243643A1 - Status: Published application - Kind: A1 - Application number: 17/248,507 - Filed: 2021-01-27 - Published: 2021-08-05 - Earliest claimed: 2020-01-30 - Assignees: QUALCOMM Incorporated - Applicants: Qualcomm Incorporated - Inventors: Sitaramanjaneyulu Kanamarlapudi; Prasad Reddy Kadiri; Leena Zacharias; Arnaud Meylan - Web page: https://patentgrep.com/patent/US20210243643A1 ## CPC - H04L 1/1896: {ARQ related signaling} - H04W 28/0278: {using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12)} - H04L 1/1642: {Formats specially adapted for sequence numbers} - H04L 1/1832: {Details of sliding window management} - H04L 1/1848: {Time-out mechanisms} - H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)} - H04L 47/34: ensuring sequence integrity, e.g. using sequence numbers - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Wireless communication systems and methods related to radio link control (RLC) transmissions are provided. A first wireless communication device transmits a sequence of protocol data units (PDUs). The first wireless communication device receives a first reception status report for a first portion of a receiver buffer window used for receiving the sequence of PDUs from a second wireless communication device. The first wireless communication device receives a second reception status report for a second portion of the receiver buffer window, the second portion being different from the first portion, from the second wireless communication device. ## Claims ### Claim 1 A method of wireless communication comprising: receiving, by a first wireless communication device from a second wireless communication device, a sequence of protocol data units (PDUs); transmitting, by the first wireless communication device to the second wireless communication device, a first reception status report for a first portion of a receiver buffer window used for receiving the sequence of PDUs; and transmitting, by the first wireless communication device to the second wireless communication device, a second reception status report for a second portion of the receiver buffer window, the second portion being different from the first portion. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving, by the first wireless communication device from the second wireless communication device, an indication to support transmission of a reception status report for a portion of the receiver buffer window other than the entire receiver buffer window. ### Claim 3 (depends on 1) The method of claim 1, further comprising: transmitting, by the first wireless communication device to the second wireless communication device, a buffer status report (BSR) indicating a size of remaining reception status reports to be transmitted. ### Claim 4 (depends on 3) The method of claim 3, wherein the first wireless communication device transmits the BSR after transmitting the first reception status report. ### Claim 5 (depends on 3) The method of claim 3, wherein the transmitting the first reception status report includes transmitting a communication signal including the BSR and the first reception status report. ### Claim 6 (depends on 1) The method of claim 1, wherein each PDU in the sequence of PDUs is associated with a sequence number (SN) and each of the first and second reception status reports comprises: a list of sequence numbers SNs associated with PDUs of the sequence of PDUs, wherein each PDU associated with a SN in the list was not received; and an end-acknowledgement SN indicating an exclusive upper bound on PDUs for which information is reported. ### Claim 7 (depends on 6) The method of claim 6, wherein the second reception status report includes a control PDU type (CPT) field indicating that the end-acknowledgement SN of the second reception status report further indicates a SN associated with a next expected PDU by the first wireless communication device. ### Claim 8 (depends on 7) The method of claim 7, further comprising: receiving, by the first wireless communication device from the second wireless communication device, a next sequence of PDUs based on the end-acknowledgement SN of the second reception status report. ### Claim 9 (depends on 6) The method of claim 6, wherein the first reception status report includes a control PDU type (CPT) field indicating that the end-acknowledgement SN of the first reception status report corresponds to an upper edge of the receiver buffer window used for receiving the sequence of PDUs. ### Claim 10 (depends on 6) The method of claim 6, wherein the second reception status report includes a control PDU type (CPT) field indicating that the end-acknowledgement SN of the first reception status report does not indicate a next expected PDU by the first wireless communication device. ### Claim 11 (depends on 6) The method of claim 6, wherein the first reception status report further comprises a start-acknowledgement SN indicating an inclusive lower bound on SNs for which the first reception status report provides information. ### Claim 12 (depends on 1) The method of claim 1, further comprising: determining, by the first wireless communication device, that one or more PDUs of the sequence of PDUs was not received. ### Claim 13 (depends on 1) The method of claim 1, further comprising: starting, in response to transmitting the second reception status report, a timer prohibiting transmission of any status reports until the timer elapses. ### Claim 14 (depends on 1) The method of claim 1, further comprising: refraining from starting, in response to transmitting the first reception status report, a timer prohibiting transmission of any status reports until the timer elapses. ### Claim 15 (depends on 1) The method of claim 1, wherein each PDU in the sequence of PDUs comprises a Radio Link Control (RLC) PDU, and each of the first and second reception status reports comprises an RLC status PDU. ### Claim 16 A method of wireless communication comprising: transmitting, by a first wireless communication device, a sequence of protocol data units (PDUs); receiving, by the first wireless communication device from a second wireless communication device, a first reception status report for a first portion of a receiver buffer window used for receiving the sequence of PDUs; and receiving, by the first wireless communication device from the second wireless communication device, a second reception status report for a second portion of the receiver buffer window, the second portion being different from the first portion. ### Claim 17 (depends on 16) The method of claim 16, wherein each PDU in the sequence of PDUs is associated with a sequence number (SN) and each of the first and second reception status reports comprises: a list of SNs associated with PDUs of the sequence of PDUs, wherein each PDU associated with a SN in the list has a negative-acknowledgement (NACK) status; and an end-acknowledgement SN indicating an exclusive upper bound on PDUs for which information is reported. ### Claim 18 An apparatus comprising: a processor; and a transceiver coupled to the processor, wherein the transceiver is configured to: receive from a wireless communication device a sequence of protocol data units (PDUs); transmit to the wireless communication device a first reception status report for a first portion of a receiver buffer window used for receiving the sequence of PDUs; and transmit to the wireless communication device a second reception status report for a second portion of the receiver buffer window, the second portion being different from the first portion. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the transceiver is further configured to: transmit to the wireless communication device a buffer status report (BSR) indicating a size of remaining reception status reports to be transmitted. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the transceiver is configured to transmit the BSR by transmitting to the wireless communication device the BSR after transmitting the first reception status report. ### Claim 21 (depends on 19) The apparatus of claim 19, wherein the transceiver is further configured to transmit a communication signal including the BSR and the first reception status report. ### Claim 22 (depends on 18) The apparatus of claim 18, wherein each PDU in the sequence of PDUs comprises a Radio Link Control (RLC) PDU, and each of the first and second reception status reports comprises an RLC status PDU. ### Claim 23 (depends on 18) The apparatus of claim 18, wherein the processor is configured to start, in response to apparatus transmitting the second reception status report, a timer prohibiting transmission of any status reports until the timer elapses. ### Claim 24 (depends on 18) The apparatus of claim 18, wherein the processor is configured to refrain from starting, in response to apparatus transmitting the first reception status report, a timer prohibiting transmission of any status reports until the timer elapses. ### Claim 25 (depends on 18) The apparatus of claim 18, wherein each PDU in the sequence of PDUs is associated with a sequence number (SN) and each of the first and second reception status reports comprises: a list of sequence numbers SNs associated with PDUs of the sequence of PDUs, wherein each PDU associated with a SN in the list was not received; and an end-acknowledgement SN indicating an exclusive upper bound on PDUs for which information is reported. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein the first reception status report includes a control PDU type (CPT) field indicating that the end-acknowledgement SN of the first reception status report corresponds to an upper edge of the receiver buffer window used for receiving the sequence of PDUs. ### Claim 27 (depends on 25) The apparatus of claim 25, wherein the second reception status report includes a control PDU type (CPT) field indicating that the end-acknowledgement SN of the second reception status report further indicates a SN associated with a next expected PDU. ### Claim 28 (depends on 25) The apparatus of claim 25, wherein the first reception status report further comprises a start-acknowledgement SN indicating an inclusive lower bound on SNs for which the first reception status report provides information. ### Claim 29 An apparatus comprising: a processor; and a transceiver coupled to the processor, wherein the transceiver is configured to: transmit a sequence of protocol data units (PDUs); receive from a wireless communication device a first reception status report for a first portion of a receiver buffer window used for receiving the sequence of PDUs; and receive from the wireless communication device a second reception status report for a second portion of the receiver buffer window, the second portion being different from the first portion. ### Claim 30 (depends on 29) The apparatus of claim 29, wherein each PDU in the sequence of PDUs is associated with a sequence number (SN) and each of the first and second reception status reports comprises: a list of SNs associated with PDUs of the sequence of PDUs, wherein each PDU associated with a SN in the list has a negative-acknowledgement (NACK) status; and an end-acknowledgement SN indicating an exclusive upper bound on PDUs for which information is reported.