535 results about "PDCP" patented technology

The present disclosure provides a timer processing method, an apparatus and a storage medium. On a terminal side, the method includes: determining a PDCP SDU group, where the terminal maintains different PDCP discard timer lengths for multiple PDCP SDUs in the PDCP SDU group. Therefore, it is beneficial for realizing the effective transmission of multiple PDCP SDUs in the PDCP SDU group, and realizing the effective transmission of multiple IP packets in a data frame, thereby improving the air interface resource efficiency while ensuring the packet delay requirement.

The present disclosure provides a timer processing method, an apparatus and a storage medium. On a terminal side, the method includes: determining a PDCP SDU group, where the terminal maintains different PDCP discard timer lengths for multiple PDCP SDUs in the PDCP SDU group. Therefore, it is beneficial for realizing the effective transmission of multiple PDCP SDUs in the PDCP SDU group, and realizing the effective transmission of multiple IP packets in a data frame, thereby improving the air interface resource efficiency while ensuring the packet delay requirement.

A wireless transmit / receive unit (WTRU) includes a processor and a transceiver that receive a PDCP configuration for a split bearer. The PDCP configuration includes information about first and second discard time periods. The processor stores a first packet and a second packet in a PD-CP transmit buffer. The processor and transceiver start the first discard time period and transmit the first packet over the primary path and start the second discard time period and transmit the second packet over the secondary path. The processor and transceiver discard the first packet stored in the PDCP transmit buffer based on one of expiry of the first discard time period or the receipt of an acknowledgement (ACK) for the first packet, and discard the second packet stored in the PDCP transmit buffer based on one of expiry of the second discard time period or receipt of an ACK for the second packet.

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.

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.

A data processing apparatus, configured in a terminal equipment, includes: setting processor circuitry configured to set a discard timer duration for a protocol data unit (PDU) Set; and processor circuitry configured to discard a PDU Set corresponding to an expired discard timer at a packet data convergence protocol (PDCP) layer when a discard timer expires.

The present disclosure describes methods, system, and devices for handling data unit transmission problems. One method includes determining, by a first communication node, that at least one packet data convergence protocol (PDCP) protocol data unit (PDU) is discarded; and sending, by the first communication node to a second communication node, a first message indicating that the at least one PDCP PDU is discarded, so that the second communication node is configured to ignore the at least one discarded PDCP PDU when performing PDCP reordering. Another method includes receiving, from a first communication node by a second communication node, a first message indicating that at least one PDCP PDU is discarded; and determining, by the second communication node, to ignore the at least one discarded PDCP PDU when performing PDCP reordering.

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.

A device may determine conditional availability of data for transmission. A device (e.g., in medium access control (MAC), radio link control (RLC), and / or packet data convergence protocol (PDCP) may determine a second amount of data is available for conditional transmission (e.g., for a scheduling request (SR), buffer status report (BSR), and / or multiplexing in a transport block (TB)) as a function of, e.g., the transmission status of a first amount of data multiplexed in a TB, available for transmission, discarded, and / or transmitted. In examples, a device may receive an indication of first data, receive an indication of second data, determine that a dependency exists between the first and second data, determine the second data is unavailable for transmission, determine condition(s), determine an amount of the second data is available for transmission based on satisfaction of the condition(s), and perform transmission processing or transmission of the amount of the second data.

Disclosed are a method and apparatus for performing layer 1 (L1) / layer 2 (L2) triggered mobility (LTM) in a wireless communication system. The UE performs first comparison between a first identification information value of a serving cell and a second identification information value of a target cell to determine whether to reestablish a packet data convergence protocol (PDCP) in an LTM procedure. In addition, after performing the first comparison in the LTM procedure, the UE performs second comparison between a third identification information value of the serving cell and a fourth identification information value of the target cell to determine whether to reset the L2. Then, the UE performs an L2 reset operation based on the first comparison and the second comparison in the LTM procedure.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitting device may detect a condition associated with a packet data convergence protocol (PDCP) status report transmission. The transmitting device may transmit, based at least in part on detecting the condition, a PDCP status report that indicates a first sequence number corresponding to a first protocol data unit that is not to be transmitted by the transmitting device and that indicates a quantity of sequence numbers corresponding to a quantity of protocol data units beginning with the first protocol data unit that are not to be transmitted by the transmitting device. Numerous other aspects are described.

There is provided a method of wireless transmission of protocol data units over one or more radio link modules, the method comprising:splitting a service data unit, received from an upper layer, into a plurality of data packets;obtaining combined data packets, by applying a Network Coding to the data packets, wherein padding is added, if necessary, to the service data unit or to data packets to have data packets of equal length to which is applied the Network Coding;encapsulating the combined data packets into at least one protocol data unit, wherein each protocol data unit comprises a header and wherein the header contains a padding indication for indicating whether padding has been added or not, andtransmitting the at least one protocol data unit over the one or more radio link modules.

Embodiments of the present application relate to methods and apparatuses for supporting a packet discarding operation in a packet data convergence protocol (PDCP) layer due to a packet loss. According to an embodiment of the present application, a PDCP receiving entity includes a processor and a transceiver coupled to the processor; and the processor is configured: to detect a packet loss or to receive, via the transceiver from a PDCP transmitting entity, parameter information regarding a discarding operation of the PDCP receiving entity, wherein the packet loss or the discarding operation is associated with a packet; and to perform the discarding operation to discard a further packet related to the packet in a receiving buffer, in response to detecting the packet loss or in response to receiving the parameter information.

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 disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting a higher data transmission rate. A method of a terminal connected to a first node and a second node in a dual connectivity environment is provided. The method includes performing a radio link failure (RLF) prediction of the second node, transmitting, to at least one of the first node or the second node, a failure prediction report based on the RLF prediction, and performing, by a packet data convergence protocol (PDCP) entity based on the RLF prediction, PDCP pre-recovery including at least one of stopping uplink PDCP packet data unit (PDU) splitting to a radio link control (RLC) entity related to the second node for a split bearer, or retransmitting unacknowledged uplink PDCP data PDU previously submitted to an acknowledged mode (AM) RLC entity related to the second node for which successful delivery has not been confirmed by the AM RLC entity.

Provided are a method and device for switching between unicast transmission and multicast / broadcast service (MBS) transmission in a cellular wireless communication network. The method for a base station to switch MBS data transmission may include: transmitting configuration information for reception of MBS data of a user equipment (UE) to the UE; transmitting information instructing a change of radio bearer for the reception of the MBS data to the UE; and receiving a packet data convergence protocol (PDCP) status report from the UE.

The disclosure relates to a communication technique for fusing a 5G communication system with IoT technology to support higher data rate after the 4G system and a system thereof. The disclosure may be applied to an intelligent service (e.g., smart home, smart building, smart city, smart or connected car, healthcare, digital education, retail, security and safety related services, etc.) based on 5G communication technology and IoT-related technology. The disclosure discloses a method for allowing a UE to normally receive a MBS service in various scenarios.

A method performed by a mobile terminal configured to communicate with a satellite having at least a part of functions of a base station is disclosed. The method includes receiving, from the satellite, information for switching a serving satellite from the satellite to another satellite; performing the switching the serving satellite based on the information, and wherein the performing the switching includes: synchronizing with a target cell which is different from a serving cell served by the satellite; resetting configuration related to a Medium Access Control (MAC) layer; and re-establishing configuration related to a Radio Link Control (RLC) layer and a Packet Data Convergence Protocol (PDCP) entity for at least one Radio Bearer (RB).

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.

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.

The invention discloses a communication method, a communication device and a storage medium, and the method comprises the steps that a packet data convergence protocol PDCP entity determines that a first media access control MAC entity satisfies a first condition, and the PDCP entity transmits time delay key data volume to the first MAC entity. Therefore, the delay key data volume can be sent to the MAC entity meeting the first condition, and the effectiveness of data transmission can be improved.

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.

A method performed by a central unit (CU) in a first radio access network (RAN) node comprises: establishing a dual connectivity (DC) of the first RAN node and a second RAN node for a wireless device; providing a service to the wireless device in the DC based on a distributed unit (DU) of the first and second RAN nodes; receiving, from a CU of the second RAN node in the DC, handover information for a handover of the wireless device from the second RAN node to the first RAN node; performing a packet data convergence protocol (PDCP) anchor change from the CU of the second RAN node to the CU of the first RAN node based on the handover information; and transmitting, to the DU of the first RAN node, a message comprising information instructing not to release the DU of the first RAN node after the PDCP anchor change.

In accordance with an embodiment a method includes receiving first data belonging to data plane data; processing the first data through a data processing layer to obtain second data; sending the second data to a packet data convergence protocol (PDCP) layer through the data processing layer; and sending third data, where the third data is obtained by processing the second data through at least the PDCP layer.

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.