281 results about "PDCP" patented technology

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.

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.

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.

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.

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.

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.

A method performed by a mobile device is disclosed. The method comprising: receiving, from a reader device on a Medium Access Control (MAC) layer, at least one first MAC data; processing the at least one first MAC data into first higher layer data than radio resource control (RRC) layer data or packet data convergence protocol (PDCP) layer data; processing a second higher layer data other than RRC layer data or packet data convergence protocol (PDCP) layer data into at least one second MAC data; and transmitting, to the reader device on the MAC layer, the at least one second MAC data.

A method comprising receiving, by a Packet Data Convergence Protocol (PDCP) entity, a plurality of PDCP SDUs for transmission, discarding at least one PDCP SDU from the plurality of PDCP SDUs for transmission, and transmitting a discard notification, the discard notification indicating the discarding of the PDCP SDU is disclosed.

A data processing apparatus, configured in a transmitting device, the transmitting device being a terminal equipment or a network device, includes: a receiving device; and a transmitter configured to, after the transmitting device discards PDCP SDUs, transmit sequence number information of discarded PDCP SDUs to the receiving device.

The present disclosure relates to a method of performing operations for a User Equipment (UE) in a wireless communication system. In particular, the method is performed by a Radio Link Control (RLC) entity of the UE and includes the steps of: receiving a RLC Service Data Unit (SDU) from a Packet Data Convergence Protocol (PDCP) entity of the UE; segmenting the RLC SDU into a plurality of RLC SDU segments based on an uplink (UL) grant; submitting at least one RLC SDU segment among the plurality of RLC SDU segments to a Medium Access Control (MAC) entity of the UE; and based on a missing indication related to the at least one RLC SDU segment being received from the MAC entity, discarding remaining RLC SDU segments related to the RLC SDU.

User equipment includes a transceiver configured to transmit and receive signals over an air interface, a memory configured to store executable instructions, a processor configured to execute instructions stored in the memory. The processor executes the instructions to measure characteristics of uplink channels of the air interface at a first physical (PHY) layer and a second PHY layer. The processor also executes instructions to selectively route data from a packet data convergence protocol (PDCP) layer to one or more of a first radio link control (RLC) layer associated with the first PHY layer and a second RLC layer associated with the second PHY layer based upon the characteristics of the uplink channels.

The invention provides a wireless communication method and a communication device. The method comprises that a first device sends first information to a second device, and a protocol stack of the first device does not comprise a packet data convergence protocol (PDCP) layer. In the embodiment of the application, a PDCP layer is no longer set in the protocol stack of the first device, so that compared with the first device which performs communication based on a traditional protocol stack, the communication complexity of the first device can be reduced.

Embodiments of the present disclosure provide a data discarding method, a communication device, a communication system, a storage medium, and a program product. The method is executed by a terminal, and the method comprises: discarding a first data packet among at least one packet data convergence protocol (PDCP) data packet, wherein the first data packet is a PDCP data packet that can be first discarded among the at least one PDCP data packet. In the technical solution provided by the embodiments of the present disclosure, a terminal discards a first data packet that can be first discarded among at least one PDCP data packet, thereby reducing the number of PDCP data packets to be processed or transmitted, thus effectively alleviating buffer overflow of the terminal, and also ensuring timely processing and transmission of PDCP data packets among the at least one PDCP data packet other than the first data packet.

A method and an apparatus for supporting MBS in a wireless communication system are provided. A method performed by a user equipment (UE) in a wireless communication system includes: receiving configuration information for a multicast broadcast service (MBS) via a radio resource control (RRC) release message; entering an RRC inactive state based on the received RRC release message; and receiving the MBS in an RRC inactive state based on the configuration information for the MBS, where the MBS is received via a multicast bearer for the MBS, and where the MBS is received via a multicast bearer for the MBS. At least one of a Packet Data Convergence Protocol (PDCP) entity, a Radio Link Control (RLC) entity, a Medium Access Control (MAC) entity, a Physical Layer entity and a Service Data Adaptation Protocol (SDAP) entity is configured for a multicast bearer of the MBS.

A wireless data system receives first user data for a first user application. The wireless data system receives second user data for a second user application. The wireless data system processes the first user data with a first set of functions based on the first user application. The wireless data system processes the second user data with a second set of the functions based on the second user application. The functions comprise Physical Layer (PHY), Media Access Control (MAC), Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), and Radio Resource Control (RRC). The first set of the functions differs from the second set of the functions.

A communication node (12) for use in a communication network (10). The communication node (12) stores multiple Packet Data Convergence Protocol, PDCP, packets (24) in a transmit buffer (26). The communication node (12) discards a PDCP packet (24) from the transmit buffer (26). The communication node (12) makes a decision about whether or not the discarding of the PDCP packet (24) is to trigger transmission of a PDCP SN gap report (40). The decision is made based on one or more triggering criterions. In some embodiments, the one or more triggering criterions include one or more characteristics of a PDU Set (22) to which the discarded PDCP packet (24) belongs and / or one or more characteristics of a PDU Set (22) to which another PDCP packet (24) stored in the transmit buffer (26) belongs. The communication node (12) triggers or does not trigger transmission of the PDCP SN gap report (40) according to the decision.

Various aspects of the present disclosure relate to enhancing the functionality of a user plane protocol stack, such as by synchronizing or associating certain aspects of a radio link control (RLC) layer and a Packet Data Convergence Protocol (PDCP) layer to one another. For example, the present disclosure introduces a new timer to the RLC layer that starts when the RLC layer triggers a reordering timer in the PDCP layer (e.g., by the RLC later delivering an out of order data packet to the PDCP layer). As another example, the present disclosure enhances user plane transmissions to avoid, mitigate, and / or prevent the transmission / retransmission of outdated packets, such as outdated RLC data units.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may transmit a delay status report indicating a remaining time that includes a remaining time of a packet data convergence protocol (PDCP) drop timer associated with at least one of a protocol data unit (PDU) or a set of PDUs that includes the PDU. In some aspects, the remaining time may include a difference between a delay budget and an amount of time that at least one of a PDU or a set of PDUs has been held in a data buffer of the UE, the set of PDUs including the PDU, the delay budget including a value associated with at least one of a PDB or a PSDB. The UE may perform a wireless communication operation associated with the delayed status report. Numerous other aspects are described.

The present disclosure provides a method and device for activating sidelink PDCP multiplexing, which can be applied to mobile communication technology. The method comprises: receiving first indication information sent by a network device; and activating or deactivating sidelink PDCP multiplexing of a SLRB according to the first indication information. The method can realize the activation or deactivation of sidelink PDCP multiplexing.

According to an implementation mode, a communication device receives a packet data convergence protocol (PDCP) protocol data unit (PDU) on a data radio bearer (DRB) configured for the communication device, and the PDCP protocol data unit (PDU) is configured on the data radio bearer (DRB) configured for the communication device. The PDCP PDU comprises an indication of a transmission mode, the transmission mode is used for transmitting a PDCP SDU (Service Data Unit) received on the DRB to an upper layer associated with the communication equipment, and the indication of the transmission mode indicates in-order transmission (IOD) or out-of-order transmission (OOD). The communication device processes the PDCP PDU to generate a PDCP SDU and a COUNT value associated with the PDCP SDU. And the communication equipment transmits the PDCP SDU to the upper layer according to the indication of the transmission mode.

This communication device of a cellular communication system transmits, to another communication device, a Radio Link Control (RLC) Protocol Data Unit (PDU) which includes a Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU). After the RLC PDU is transmitted, the communication device performs control so as to use a first setting value for increasing the transmission frequency of a STATUS PDU on the basis of the fact that the remaining time of a PDCP discard Timer activated for the PDCP SDU included in the RLC PDU falls below a prescribed threshold, and so as to use a second setting value at which the transmission frequency of the STATUS PDU becomes lower than the first setting value on the basis of the fact that the remaining time exceeds the prescribed threshold.

The present disclosure relates to a method of performing an operation for a packet data convergence protocol (PDCP) entity of a user equipment (UE) in a wireless communication system. Specifically, the method comprises the following steps: establishing a PDCP entity; starting a drop timer for the PDCP entity at the reference time; receiving at least one PDCP service data unit (SDU) from an upper layer during a drop timer for the PDCP entity is running; and discarding the at least one PDCP SDU based on expiration of the discard timer for the PDCP entity.

The application discloses a data processing method, a base station, a terminal and a storage medium. The data processing method comprises the following steps: acquiring a transmission control protocol (TCP) message, backing up a packet data convergence protocol (PDCP) service data unit (SDU) corresponding to the TCP message, generating and saving a sequence number code corresponding to the PDCP SDU; sending the TCP message to a data receiving end; when an acknowledgement (ACK) message carrying an acknowledgement sequence number is received according to the TCP message sent by the data receiving end, determining a sequence number code meeting an acknowledgement condition from the saved sequence number codes according to the acknowledgement sequence number in the ACK message; and deleting the PDCP SDU corresponding to the sequence number code meeting the acknowledgement condition. According to the scheme provided by the embodiment of the application, the sequence number code determined according to the ACK message acknowledgement sequence number is the maximum confirmable sequence number code, the PDCP SDU corresponding to the sequence number code smaller than or equal to the maximum confirmable sequence number code is deleted, the backup file of the PDCP SDU can be deleted more timely, and thus the message quantity of PDCP retransmission is reduced.

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 transmitting, to a base station, first information indicating that the terminal supports a delay status report (DSR) of a buffered data, receiving, from the base station, configuration information on a plurality of remaining time thresholds per logical channel group (LCG), and transmitting, to the base station, second information including a remaining time field indicating the shortest remaining time among packet data convergence protocol (PDCP) service data units (SDUs) associated with a corresponding remaining time threshold of an LCG.

The application relates to the technical field of communication, in particular to a data packet processing method and device, computer equipment and a readable storage medium. The method comprises the following steps: obtaining each protocol data unit (PDU) data packet sent by a sending end based on a packet data convergence protocol (PDCP) and the PDCP sequence number of each PDU data packet; wherein the PDCP sequence numbers of each PDU data packet obtained by copying the same PDU data packet based on the PDCP duplication protocol are the same; determining the data packet sequence of a receiving end according to the PDCP sequence numbers of each PDU data packet; if the first PDCP sequence number in the data packet sequence located in a PDCP receiving window has a repeated PDCP sequence number, then moving the PDCP receiving window in the data packet sequence according to the repeated PDCP sequence number, so as to perform deduplication processing on the PDU data packet corresponding to the repeated PDCP sequence number and forwarding processing on the PDU data packet corresponding to different PDCP sequence numbers.

A receiving device re-establishing a packet data convergence protocol (PDCP) entity. The receiving device resets a robust header compression (ROHC) context. The receiving device receives packet retransmissions having header compression based on the ROHC. The receiving device performs decompression of the packet retransmissions. The receiving device discards duplicate packets after performing the decompression of the packet retransmissions.

The invention provides a data packet processing method and device, and the method comprises the steps: carrying out the PDCP (Packet Data Convergence Protocol) cascading of a high-level data packet according to a limiting condition. According to the data packet processing method and device provided by the invention, the data packet can be effectively processed, so that the processing efficiency of the data packet is effectively improved, and the air interface overhead is reduced.