765 results about "PDCP" patented technology

This disclosure provides methods, components, devices and systems for enhanced downlink and uplink scheduling based on assistance information related to PDCP status reports. Some aspects specifically relate to a wireless communication system including a disaggregated base station architecture in which a CU provides a DU assistance information related to PDCP status reports from which assistance information the DU may determine appropriate downlink or uplink scheduling start timing for a UE. In some examples, the DU obtains from the CU assistance information indicating an unreceived PDCP SDU at a UE or the CU, and sends downlink data or an uplink grant to the UE based on the assistance information. The CU may deliver the downlink data to the DU prior to sending the assistance information or obtain uplink data from the DU after sending the assistance information. Duplication of PDCP SDU transmissions and unnecessarily extended scheduling delays may thus be minimized.

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.

Provided are a method and device for processing data. The method may include receiving higher layer signaling including packet data convergence protocol (PDCP) configuration information for configuring to perform a protocol data unit (PDU) Set-based discard operation, receiving a medium access control (MAC) control element indicating activation of a service data unit (SDU) discard operation based on PDU Set importance, and controlling a PDCP entity to start a PDU Set importance-based discard timer configured in association with the PDCP SDU when the SDU discard operation based on the PDU Set importance is activated, and a PDCP SDU belonging to the PDU Set importance of a preset criterion is received from a higher layer.

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.

Systems, methods, apparatuses, and computer program products for network coding are provided. One method may include receiving, at a second packet data convergence protocol (PDCP) entity, one or more original packet data convergence protocol (PDCP) protocol data units (PDUs) from a first PDCP entity for a radio bearer. The method may also include coding, at the second packet data convergence protocol (PDCP) entity, the original packet data convergence protocol (PDCP) protocol data units (PDUs) to produce one or more network coded packet data convergence protocol (PDCP) protocol data units (PDUs).

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication to transmit a packet based at least in part on receiving a packet data convergence protocol (PDCP) status report during an active state of a timer, or based at least in part on an expiration of the timer. The UE may transmit the packet based at least in part on the indication. Numerous other aspects are described.

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.

An embodiment of the present application relates to a method and apparatus for supporting a packet discard operation in a Packet Data Convergence Protocol (PDCP) layer due to packet loss. According to one embodiment of the present application, a PDCP receiving entity includes a processor and a transceiver coupled to the processor, the processor being configured to detect a packet loss or receive parameter information related to a discard operation of the PDCP receiving entity from a PDCP transmitting entity via the transceiver, where the packet loss or discard operation is associated with a packet, and in response to detecting the packet loss or in response to receiving the parameter information, perform a discard operation to discard further packets associated with the packet in a receiving buffer.

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.

Embodiments of the present disclosure relate to delayed status reporting (DSR). In one aspect, a terminal device determines criteria for one or more data units. One or more data units are buffered and not submitted to a lower layer in a Packet Data Convergence Protocol (PDCP). Further, the terminal device triggers a DSR based on the criterion, the DSR comprising an amount of data for the one or more data units and a remaining time associated with the one or more data units. In this manner, the efficiency of DSR reporting may be improved.

The invention provides a data transmission method and device and a storage medium, and relates to the technical field of communication. In the scheme, after the terminal device receives the PDCP discarding timer duration configured for the voice data radio bearer by the network device, the terminal device can configure the shorter PDCP discarding timer duration for the mute frame and configure the longer PDCP discarding timer duration for the voice frame through QCI / 5QI table look-up. Compared with a mute frame, the voice frame carries more useful information, so that when the mute frame is overtime, channel resources can be released by discarding the mute frame, and the voice frame behind the mute frame can be smoothly transmitted out, thereby effectively meeting the demands of different service types for the duration of the PDCP discarding timer, and improving the use experience of a user.

Provided herein are a method performed when deactivating a packet duplication and returning to a split bearer operation and an apparatus therefor. The method comprises receiving a radio resource control (RRC) message including information related to a secondary radio link control (RLC) entity for returning to the split bearer operation among more than two RLC entities associated with a packet data convergence protocol (PDCP) entity, wherein the secondary RLC entity belongs to a cell group different from a cell group of a primary RLC entity, and performing the split bearer operation using the primary RLC entity and the secondary RLC entity in case that the packet duplication is deactivated.

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.

Embodiments of the present disclosure relate to methods and apparatuses for packet data convergence protocol (PDCP) reordering management. According to an embodiment of the present disclosure, a user equipment (UE) can include: a receiver configured to receive at least one of application data unit (ADU) discard information associated with an ADU or ADU related information associated with the ADU; and a processor coupled to the receiver and configured to perform a PDCP reordering window management based on the received at least one of the ADU discard information or the ADU related information.

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.

A method for configuring a flow-based quality of service (QoS), configuring a bearer-based QoS, and introducing a new layer above a packet data convergence protocol (PDCP) layer in order to process the flow-based QoS are provided. An operation of the PDCP layer to support the new layer is also provided. The disclosure relates to a communication method and system for converging a fifth generation (5G) communication system for supporting higher data rates beyond a fourth generation (4G) system with an Internet of things (IoT) technology. The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car or connected car, health care, digital education, smart retail, security and safety services.

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.