263 results about "Service data unit" patented technology

Disclosed are systems, apparatuses, methods, and computer-readable media for use in a wireless network for facilitating radio access synchronization. The method includes receiving, from a user equipment (UE) a message having a media access control (MAC) control element (CE) format and comprising a MAC protocol data unit (PDU) structure, the message being formed by multiplexing one or more MAC service data units (SDUs). The method further includes generating a response message to the received message by multiplexing a MAC random access response (RAR) with one or more MAC SDUs. The method then transmits the response message to the UE.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system is provided. The method includes identifying whether a packet data convergence protocol (PDCP) entity is suspended in case that the PDCP entity re-establishment is requested from an upper layer, identifying whether an indicator is configured for indicating that an uplink data compression (UDC) is continuously used and a PDCP service data unit (SDU) is compressed, for an acknowledged mode (AM) data radio bearer (DRB) whose the PDCP entity is not suspended, and submitting the PDCP SDU, in case that the indicator is configured for indicating that the UDC is continuously used and the PDCP SDU is compressed.

The invention provides a vehicle-mounted passive optical network area gateway and a protocol conversion method. The gateway comprises an interface module which comprises a plurality of communication interfaces, wherein the communication interfaces are used for receiving messages of a low-speed network protocol; the data processing module adopts an FPGA (Field Programmable Gate Array) core board and is used for receiving a message, extracting effective information from the message, packaging the effective information to obtain an Ethernet protocol frame and converting the Ethernet protocol frame into an SDU (Service Data Unit); and the ONU optical module is used for performing data link layer processing on the SDU to obtain an uplink FS burst frame, and performing physical layer processing on the uplink FS burst frame to obtain a burst mode optical signal frame. The gateway can realize data access of multiple paths of CAN nodes, LIN nodes and vehicle-mounted Ethernet nodes at the same time, meets the communication protocol conversion function of low-speed nodes in each region in a real vehicle environment, and is integrated into a whole vehicle all-optical backbone network. The method is used for converting data complying with a low-speed network protocol into data complying with an XGS-PON protocol.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may deliver one or more service data units SDUs within a packet data convergence protocol (PDCP) window to an upper protocol layer before an expiration of a timer associated with the PDCP window. The UE may forward the one or more SDUs based on a forwarding rule, as part of a forwarding sub-window of the PDCP window, or both. The UE may deliver the portion of the set of SDUs based on one or more predictions of a machine learning (ML) model and / or functionality associated with SDUs of the PDCP window. In some examples, the UE may report information associated with the PDCP window to a network entity. The UE may receive one or more control messages indicating information associated with the PDCP window.

The invention relates to PDCP SN gap reporting and a state variable RXNEXT. A method, an apparatus, and a computer program product are provided. In the context of a method, the method comprises receiving (302) a message from another PDCP entity (another of the 110 / 112), the message indicating at least one sequence number. The method further comprises updating (304) a first state variable based on the at least one sequence number, where the first state variable indicates an expected sequence number of a next expected service data unit (SDU) to be received, and wherein the updating of the first state variable includes increasing the first state variable by a lowest sequence number that is higher than a reference value and that is associated with the SDU that is not considered to be discarded.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration associated with a first logical channel (LCH) with a first priority, wherein the configuration indicates one or more parameters to adjust data assigned to the LCH from the first priority to a second priority. The UE may adjust a priority of a service data unit (SDU) associated with the first LCH to the second priority in accordance with the one or more parameters. The UE may transmit the SDU via uplink shared channel (UL-SCH) resources based at least in part on the second priority. Numerous other aspects are described.

Various aspects of the present disclosure relate to enhanced packet data convergence protocol (PDCP) operation for delay-critical services. An apparatus, such as a user equipment (UE), receives a configuration message for a PDCP entity of the UE. The configuration message indicates a set of timer configurations corresponding to a set of priority levels (e.g., protocol data unit (PDU) priority levels). A network equipment (NE) configures a mapping between the set of timer configurations and the set of priority levels and transmits the configuration message according to the mapping. The PDCP entity receives at least one service data unit (SDU) for transmission. The SDU is associated with a radio bearer and a priority level of the set of priority levels. The UE selects a timer configuration from the set of timer configurations based on the priority level associated with the SDU. The UE initiates a timer according to the timer configuration.

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Specifically, the present disclosure relates to a method performed by a terminal of a wireless communication system, the method comprising the steps of: transmitting a first message including first information indicating whether the terminal supports a packet data convergence protocol (PDCP) sequence number (SN) gap report to a base station; receiving a second message including second information for configuring transmission of a PDCP SN gap report from the base station; triggering a PDCP SN gap report for notifying of the discard of a PDCP service data unit (SDU) on the basis of at least one condition; and transmitting the PDCP SN gap report to the base station.

Various aspects of the present disclosure relate to buffer status reporting (BSR) for data packets. An apparatus, such as a user equipment (UE), receives a data packet associated with a set of data packets for transmission (e.g., a service data unit (SDU) of a packet data convergence protocol (PDCP) protocol data unit (PDU) set). The set of data packets includes a first subset of data packets (e.g., source data packets) and a second subset of data packets (e.g., redundant data packets). The UE determines a condition is satisfied for transmitting a BSR. The UE transmits the BSR based on a configuration for transmitting the BSR. The BSR indicates a data volume associated with the first subset of data packets and a portion of data packets of the second subset of data packets. In some cases, the base station transmits signaling to the UE indicating the configuration.

Systems and methods for signaling for extended Reality (XR) awareness are provided. In some embodiments, a method performed by a Centralized Unit (CU) of a base station includes: providing information to a Distributed Unit (DU) of the base station to indicate which groups of Radio Link Control (RLC) Service Data Units (SDUs) belong to a unique Application Data Unit (ADU) which needs to be delivered within the same time budget; and adding ADU related information on each Packet Data Convergence Protocol (PDCP) Protocol Data Unit (PDU) to allow RLC entity to be aware which RLC SDU belongs to which ADU. In this way, a RAN can discard a set of packets together which are no longer valid for the application. This results in network resources not being wasted and better management of the network capacity. This allows the network to more efficiently manage the resources and its scheduler.

Embodiments of the subject application relate to methods and apparatuses for a packet data convergence protocol (PDCP) service data unit (SDU) reception handling operation. According to an embodiment of the subject application, a user equipment (UE) includes a processor and a transceiver coupled to the processor; and the processor is configured to: receive a configuration for enabling an update function of a delivery state variable associated with a first packet data convergence protocol (PDCP) service data unit (SDU) not delivered by a PDCP entity of a data radio bearer (DRB) to an upper layer of the UE via the transceiver from a network; and enable the update function of the delivery state variable for the PDCP entity of the DRB based on the configuration.

The present disclosure relates to a method performed by a communication apparatus. The method comprising: transmitting a Radio Link Control (RLC) Service Data Unit (SDU) corresponding to a Protocol Data Unit (PDU) or a PDU set; starting a discard timer; performing at least one automatic repeat request (ARQ) retransmission of the RLC SDU in a case where the communication apparatus receives information indicating a specific RLC SDU is not received successfully and the discard timer is running; and stopping the at least one ARQ retransmission in a case where at least one of: the discard timer has been expired, a discard indication for the specific RLC SDU has been obtained from a Packet Data Convergence Protocol (PDCP) layer, or a number of the at least one ARQ retransmission has reached to a specific number.

A wireless frame transmission method is performed by a transmitter. The method includes: transmitting a wireless frame that includes non-low-latency service data and low-latency service data; where the low-latency service data is transmitted between two media access control service data units (MSDUs) of an aggregation of MSDUs (A-MSDU) of the non-low-latency service data; a lifetime parameter of the A-MSDU includes: a first parameter or a second parameter; the first parameter includes a preset lifetime of the non-low-latency service data; and the second parameter includes a sum of the preset lifetime and a transmission duration of the low-latency service data.

Various solutions for packet data convergence protocol (PDCP) enhancements on control protocol data unit (PDU) for sequence number (SN) gap report are described. A transmitting apparatus may obtain one or more PDCP service data units (SDUs) from an upper layer. The transmitting apparatus may detect that the one or more PDCP SDUs, each associated with a PDCP SN, are discarded before successfully transmitted to a receiving apparatus. Then, the transmitting apparatus may transmit a PDCP control PDU to the receiving apparatus. The PDCP control PDU may indicate a PDCP SN gap report associated with the discarded PDCP SDUs.

A wireless device receives a radio resource control (RRC) configuration information configuring a packet data convergence protocol (PDCP) layer, for uplink transmission, of the wireless device to send a PDCP report indicating uplink service data unit (SDU) discard by the PDCP layer. The wireless device determines expiry of a timer of at least one uplink PDCP SDU, wherein a plurality of uplink PDCP SDUs, comprising a data unit (DU) of a data flow, comprises the at least one uplink PDCP SDU, and discards the plurality of uplink PDCP SDUs. The wireless device sends, based on the configuration information configuring the PDCP layer to send the PDCP report, a first PDCP report indicating, to a receiving base station, that the plurality of uplink PDCP SDUs are discarded.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a receiver in a wireless communication network. The receiver detects, at a Radio Link Control (RLC) layer, a missing RLC Service Data Unit (SDU) based on a discontinuity in received RLC Sequence Numbers (SNs). The receiver starts a discard timer in response to detecting the missing RLC SDU. The receiver determines that the missing RLC SDU is out-of-date upon expiration of the discard timer. The receiver transmits a status report including a positive acknowledgement for the missing RLC SDU despite the missing RLC SDU not being received.

An operating method of a first apparatus communicating with a second apparatus in a wireless network includes: receiving, from the second apparatus, a trigger frame including information about a random access frequency band and information about an intermediate transmission time, and transmitting a physical layer convergence procedure (PLCP) service data unit (PSDU) including a short training field (STF) and first data to the second apparatus through the random access frequency band at the intermediate transmission time, wherein the intermediate transmission time is in a physical layer protocol data unit (PPDU) transmission period.

A Multi-Link Device, MLD, (110) with a plurality of affiliated stations, i.e. access points, APs, or non-AP stations, (113a-c) for Non Co-Located Multi-Link Operation communication via a plurality of links (130a-c) with a further peer MLD (120) with a plurality of further affiliated stations (123a-c) is disclosed. The MLD (110) comprises processing circuitry (111) configured to assign a global packet number, PN, but no sequence number, SN, to a MAC Service Data Unit, MSDU, payload, wherein the MSDU payload comprises a MSDU, an aggregate MSDU, A-MSDU, or a MAC Management Protocol Data Unit, MMPDU, irrespective of whether the MSDU payload is further cryptographically encapsulated or not. The processing circuitry (111) may be further configured to cryptographically encapsulate the MSDU payload.

A WLAN station (110; 120) for communicating with a further WLAN station (120; 110) is disclosed. The WLAN station (110; 120) is configured to encrypt a MAC Service Data Unit, MSDU, payload, wherein the MSDU payload comprises a MSDU, an aggregate MSDU, A-MSDU, or a MAC Management Protocol Data Unit, MMPDU, wherein the MSDU, the A-MSDU, or the MMPDU comprises one or more source address values, SAs, and one or more destination address values, DAs. Moreover, the WLAN station (110; 120) is configured to generate a MAC Protocol Data Unit, MPDU, or an aggregate MPDU, A-MPDU, based on the encrypted MSDU payload, and to transmit the MPDU or A-MPDU to the further WLAN station (120; 110).

A method of transmitting data by a communications device, the method comprising receiving a plurality of service data units including a first service data unit and a second service data unit at a Service Data Adaptation Protocol (SDAP), service access point (SAP) according to one or more quality of service (QoS) flows, each of the QoS flows defining a quality of service for the data received from the service data units, mapping the service data units received according to the one or more QoS flows on to one or more radio bearers, each of the one or more radio bearers being defined by a packet data convergence protocol (PDCP) entity within a PDCP layer, forming the service data units into protocol data units for transmission via the radio bearer to which the corresponding QoS flow has been mapped, and transmitting the protocol data units via the corresponding radio bearer.

Methods, systems, and devices for dynamically adjusting a reordering timer are described. A wireless device may receive control signaling indicating a configuration comprising a first set of one or more parameters associated with a reordering timer for a packet data convergence protocol (PDCP) entity of the wireless device, wherein the reordering timer is associated with reordering of a set of service data units (SDUs) by the PDCP entity of the wireless device. The wireless device may determine a duration for the reordering timer according to the first set of one or more parameters associated with the reordering timer, and the wireless device may forward one or more SDUs of the set of SDUs, based at least in part on an expiration of the reordering timer.

The invention provides a communication method and device, belongs to the technical field of communication, and aims to simplify an RCL segmentation mode and reduce processing complexity so as to meet communication requirements in future new service scenes such as an RFID system and A-IoT, and the method comprises the following steps: a first communication device obtains M radio link control protocol data units (RLC PDUs), and transmitting the M RLC PDUs to the second communication device. Wherein the M RLC PDUs are obtained by segmenting a radio link control service data unit RLC SDU according to a preset data size and / or a preset segmentation number, and M is an integer greater than 1.

The invention relates to a method comprising: receiving or determining, by a wireless device, one or more configuration parameters, the one or more configuration parameters comprising an indication to retransmit a radio link control (RLC) service data unit (SDU) in response to the RLC SDU becoming delay-critical; and retransmitting, by the wireless device, based on one or more conditions being met, the RLC SDU, after the RLC SDU becomes delay-critical.

A method and apparatus to support enhanced retransmission is provided. Method for supporting enhanced retransmission includes receiving from a base station a Radio Resource Control (RRC) message, wherein the RRC message comprises a first set of Radio Link Control (RLC) configuration parameters for a first radio bearer, a first set of PDCP configuration parameters for the first radio bearer and a set of Medium Access Control (MAC) configuration parameter, transmitting to the base station a first packet related to the first radio bearer in case that remaining time of at least one PDCP Service Data Unit (SDU) is less than the first threshold, wherein the first packet related to the first radio bearer is a Acknowledged Mode Data (AMD) Protocol Data Unit (PDU) that includes a poll and is associated with the first radio bearer, and transmitting to the base station a second packet related to the first radio bearer in case that remaining time of at least one PDCP SDU is less than the second threshold, wherein the second packet related to the first radio bearer is a Delay Status Report (DSR) that comprises information on delay related to the first radio bearer.

Methods, systems, and devices for wireless communications are described. A first device may transmit control signaling to a second device. The control signaling may indicate a set of different modulation and coding schemes (MCSs) to be applied to at least one of a set of spatial streams or a set of resource units (RUs), where the control signaling may indicate that a respective MCS to be applied to a respective spatial stream or to a respective RU. The first device may transmit, one or more first bits of a first service data unit to the second device via a first spatial stream of or via a first RU using a first MCS and transmit one or more second bits, of the first service data unit or of a second service data unit via a second spatial stream or via a second RU using a second MCS.

The present disclosure relates to a method of performing operations for a User Equipment in a wireless communication system. In particular, the method includes steps of receiving, by a medium access control (MAC) entity of the user equipment, a protocol data unit (PDU) containing at least one service data unit (SDU) and a MAC control element (CE); delivering, by the MAC entity, the at least one SDU to an upper layer; and based on an integrity verification failure related to the at least one SDU being detected by the upper layer, considering the MAC CE as invalid and discarding the MAC CE.

Embodiments of the present disclosure provide a solution for communication. In a solution, a first devices determine that a report for radio link control (RLC) sequence number (SN) gap is triggered based on at least one of the following conditions is satisfied: an RLC service data unit (SDU) is discarded, a retransmission of the RLC SDU is stopped, the RLC SDU is already associated with an SN value, the discarded RLC SDU has not been submitted to a lower layer, the discarded RLC SDU has been submitted to the lower layer but is not acknowledged, or there is at least one stored RLC SDU associated with an SN value that is not smaller than an SN value associated with a discarded RLC SDU; and transmits the report for RLC SN gap to a second device.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure provides a method and a device for discarding RLC AM data in a wireless communication system. The method of a terminal comprise: receiving, from a base station, a message comprising information on a timer for a radio link control (RLC) service data unit (SDU) discard at an RLC entity of the terminal; receiving, from the base station, an acknowledged mode (AM) data (AMD) protocol data unit (PDU) with a sequence number (SN) x; when an AMD PDU with a SN y lower than x is not received, starting the timer; and when the timer expires, discarding at least one AMD PDU from a buffer with a SN lower than x+1.

A method and apparatus to support enhanced retransmission is provided. Method for supporting enhanced retransmission includes receiving from a base station a Radio Resource Control (RRC) message, wherein the RRC message comprises a parameter indicating a remaining time threshold related to a radio bearer and a parameter indicating a maximum retransmission number for a Radio Link Control (RLC) entity that is associated with the radio bearer, and performing retransmission of a specific RLC Service Data Unit (SDU) in case that at least one byte of the specific RLC SDU has been transmitted and remaining time of a Packet Data Convergence Protocol (PDCP) SDU associated the specific RLC SDU becomes less than the remaining time threshold.