461 results about "Radio Link Control" patented technology

This application provides a communication method and a communication apparatus. The method includes: A first network unit sends first information to a second network unit, where the first information includes first indication information, and the first indication information indicates a configuration type of a first radio bearer of a remote terminal device. In this way, the second network unit may determine, based on the configuration type of the first radio bearer, whether to provide a configuration of a first radio link control (RLC) bearer corresponding to the first radio bearer on a link between the remote terminal device and the second network unit, to provide correct configuration information of the radio bearer for the remote terminal device. This helps improve data transmission efficiency of the radio bearer, improve radio resource utilization of a mobile network system, and improve system performance.

A method performed by an integrated access backhaul (IAB) node in a wireless communication system is provided. The method comprises: receiving, from a base station, configuration information regarding an uplink (UL) grant, receiving, from the base station, configuration information regarding backhaul (BH) radio link control (RLC) channel via higher layer signaling, identifying, based on the configuration information regarding BH RLC channel, whether an extended logical channel identifier (eLCID) is used, in case that the eLCID is not used and a UL grant size is equal to or larger than a first size, not transmitting only a padding buffer status report (BSR) or not transmitting only padding or not transmitting only the padding BSR and the padding, and in case that the eLCID is used and the UL grant size is equal to or larger than a second size, not transmitting only the padding BSR or not transmitting only the padding or not transmitting only the padding BSR and the padding.

A method performed by an integrated access backhaul (IAB) node in a wireless communication system is provided. The method comprises: receiving, from a base station, configuration information regarding an uplink (UL) grant, receiving, from the base station, configuration information regarding backhaul (BH) radio link control (RLC) channel via higher layer signaling, identifying, based on the configuration information regarding BH RLC channel, whether an extended logical channel identifier (eLCID) is used, in case that the eLCID is not used and a UL grant size is equal to or larger than a first size, not transmitting only a padding buffer status report (BSR) or not transmitting only padding or not transmitting only the padding BSR and the padding, and in case that the eLCID is used and the UL grant size is equal to or larger than a second size, not transmitting only the padding BSR or not transmitting only the padding or not transmitting only the padding BSR and the padding.

A terminal apparatus for communicating with a base station apparatus is provided. The terminal apparatus includes a receiver configured to receive a Radio Resource Control (RRC) reconfiguration message including a parameter related to a first configuration from the base station apparatus, and a processing unit configured to perform configuration in accordance with the RRC reconfiguration message received. In a case that a first timer of an RRC protocol expires, a radio link failure of a source primary cell is not detected, and configuration related to Dual Active Protocol Stack (DAPS) handover is performed for the terminal apparatus, the processing unit reconfigures all of state variables configured for a Radio Link Control (RLC) entity of a Signaling Radio Bearer (SRB) in the source primary cell to respective initial values, resumes the SRB suspended in the source primary cell, and transmits an RRC message for notifying the base station apparatus that the DAPS handover has failed.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure relates to a method and transmitting device (101) for handling enhanced RLC transmit operation for XR. The method includes receiving the discard indication at RLC layer from upper layer to discard at least one RLC SDU associated with the SN. Further, the method includes abandoning or stopping the transmission or retransmission of at least one RLC SDU, segment of the RLC SDU, and RLC data PDU, when the discard indication is received for the at least one corresponding RLC SDU from the upper layer.

A method performed by a centralized-radio access network (C-RAN) hub device in a wireless communication system is provided. The method includes transmitting a request message for moving a function for a cell of a distributed unit (DU) connected to the C-RAN hub device, based on the request message reallocating at least one of a packet distributing pod (PDP) function of the DU for a radio link control (RLC) layer or a baseband processing pod (BPP) function for a medium access control (MAC) layer, and based on the reallocation, performing at least one of the PDP function of the DU and the BPP function of the DU.

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.

This disclosure describes systems, methods, and devices for gap management for packet data convergence protocol and radio link control count. A device may encode a first subset of packets; encode a second subset of packets based on the first subset; allocate a count for the first subset and the second subset; detect that the second subset is not to be transmitted by the device or decoded by a second device; encode, based on detecting that the first subset is not to be transmitted by the device or decoded by the second device, an indication to be transmitted to the second device to instruct the second device to skip a gap in the count based on the second subset.

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.

Systems, methods, and instrumentalities are disclosed herein for an uplink enhancement procedure. A device, such as a wireless transmit / receive unit (WTRU) may receive configuration information from a network. The configuration information may indicate a condition to trigger an uplink enhancement. In some examples, the uplink enhancement may be associated with a radio link control (RLC) enhancement. In some examples, the uplink enhancement may be associated with (e.g., may be further associated with) a medium access control (MAC) enhancement. The device may receive a data set associated with an uplink transmission. The device may determine whether to perform the uplink enhancement based on the configuration information. Based on a determination to perform the uplink enhancement, the device may perform the uplink transmission using the uplink enhancement.

A method may include receiving, by a base station distributed unit from a wireless device not in a radio resource control (RRC) connected state an RRC request message for a small data transmission (SDT) procedure and uplink data associated with the SDT procedure. The method may also include sending, to a base station central unit, the RRC request message for the SDT procedure. The method may further include receiving, from the base station central unit, a message that includes radio link control (RLC) configuration parameters for the SDT procedure and a field indicating that the RLC configuration parameters are for the SDT procedure. The method may additionally include sending the uplink data to the base station central unit in accordance with the field.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, configuration information indicating that network coding is enabled for initial transmissions associated with a multicast / broadcast service (MBS) and indicating that network coding is enabled for retransmissions associated with the MBS. The UE may receive, via a multicast traffic channel or a dedicated traffic channel, an initial transmission associated with the MBS, wherein the initial transmission is associated with a first set of encoded packets. The UE may transmit a radio link control (RLC) status feedback message associated with the initial transmission. The UE may receive, via the multicast traffic channel or the dedicated traffic channel, a retransmission associated with the initial transmission, wherein the retransmission is associated with a second set of encoded packets. Numerous other aspects are described.

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.

A method for managing data transmission in a communication network operating in a radio link control (RLC) acknowledge mode (RLC AM), the network comprising a transmitter and a receiver, the method at the transmitter comprising: stopping retransmission of a protocol data unit, PDU, to the receiver in dependence on a number of retransmissions of the PDU exceeding a predetermined discard threshold value, wherein the predetermined discard threshold value is less than a threshold value associated with a radio link failure (RLF) of the network. The retransmission of the PDU may be stopped if a discard timer associated with the PDU exceeds a discard timer threshold value. The PDU may be associated with a PDU Set, and the discard timer is started when a first PDU of the PDU Set is received by the transmitter. The method may comprise, upon determining that retransmission of the PDU is stopped, transmitting a discard notification to the receiver. The method may comprise, upon determining that retransmission of the PDU is stopped, transmitting a PDU of a subsequent PDU Set.

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 aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a network node, a first feedback signal via a physical (PHY) layer indication. The UE may transmit, to the network node, a second feedback signal via the PHY layer indication or via a medium access control (MAC) control element (CE) (MAC-CE) indication, wherein the second feedback signal is associated with radio link control (RLC) packet loss. Numerous other aspects are described.

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.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a configuration message indicating a threshold time duration event associated with transmission of a polling message for requesting a status protocol data unit (PDU). The threshold time duration event may correspond to a time period following transmission of a data message without reception of the status PDU. The UE may transmit a first data message. After a time duration has elapsed since transmission of the first data message without reception of a first status PDU, the UE may transmit a first polling message that requests the first status PDU. The first status PDU may include feedback for the first data message. The UE may transmit the first polling message based on the time duration satisfying the threshold time duration event.

In one aspect, a device for wireless communication is disclosed. The device includes at least one processor and a memory coupled to the at least one processor. The at least one processor is configured to cause the device to: receive reassembly timer configuration information. The at least one processor is also configured to receive one or more radio link control (RLC) segments, each RLC segment associated with a sequence number (SN), wherein the one or more RLC segments are associated with a reassembly timer expiration time based on the reassembly timer configuration information. The at least one processor is further configured to: release, prior to the reassembly timer expiration time, the one or more RLC segments based on an adjusted reassembly timer expiration time. The adjusted reassembly timer expiration time is determined based on an output from a learning model of the device. Other aspects are described and claimed.

The present application relates to devices and components including apparatus, systems, and methods for congestion signaling by a radio link control layer in wireless networks.

Methods, systems, and devices for wireless communications are described. Techniques described herein provide for radio link control (RLC) acknowledgment mode (AM) retransmissions. In some examples, a user equipment (UE) may receive control signaling that indicates a configuration for a scheduling request. The configuration may indicate the scheduling request is to report an availability of retransmission traffic currently available for transmission. The UE may transmit the scheduling request indicating the availability of retransmission traffic based on the configuration. The UE may receive a grant for a portion of the retransmission traffic responsive to the scheduling request, and the UE may transmit the portion of the retransmission traffic based on the grant.

The present disclosure relates to methods and apparatus for controlling wireless backhaul link. In one example method, a first device determines to manage a first radio link control (RLC) bearer on a wireless backhaul link between a first backhaul node and a second device, where the second device is a parent node of the first backhaul node, the first device is a centralized unit (CU) of a donor base station, and the second device is a distributed unit (DU) of the donor base station; the second device is a second backhaul node, and the first device is a donor base station; or the first device is a CU of a donor base station, and the second device is a second backhaul node. The first device sends a backhaul type indicator and management information of the first RLC bearer to the first backhaul node.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain forward error correction (FEC) information associated with an application data unit (ADU). The UE may adjust a packet data convergence protocol (PDCP) characteristic, a radio link control (RLC) characteristic, or a physical layer hybrid automatic repeat request (HARQ) characteristic for transmitting a packet associated with the ADU based at least in part on the FEC information. Numerous other aspects are described.

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.

A method for managing data transmission in a communication network operating in a radio link control acknowledge mode, the network comprising a transmitter and a receiver, the method at the transmitter comprising: stopping retransmission of a protocol data unit, PDU, to the receiver in dependence on a discard timer associated with the PDU exceeding a discard timer threshold value.

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present 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, connected car, health care, digital education, smart retail, security and safety services. The present application relates to the field of wireless communication technologies, and discloses a method for processing an Radio Link Control (RLC) failure, an electronic device and a computer readable storage medium. The method includes: receiving, by a first network device, RLC failure related information of a user equipment (UE); processing the RLC failure correspondingly by interacting with a second network device, based on the received RLC failure related information.

Various aspects of the present disclosure relate to techniques for delay status reported (DSR) for split bearer operation. An apparatus is configured to associate a packet data convergence protocol (PDCP) entity with a primary radio link control (RLC) entity and at least one secondary RLC entity, indicate a data volume associated with the PDCP entity to a medium access control (MAC) entity for DSR, determine an amount of data available for transmission based on the data volume associated with the PDCP entity and an RLC data volume that is pending for initial transmission in the primary RLC entity and the at least one secondary RLC entity, and indicate an amount of the data volume associated with the PDCP entity to the MAC entity associated with the primary RLC entity for DSR in response to the amount of data available for transmission being less than a threshold.

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.