METHOD AND APPARATUS FOR FAILURE RECOVERY IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20230262540A1

    公开(公告)日:2023-08-17

    申请号:US17624026

    申请日:2021-03-02

    Abstract: The present disclosure relates to a failure recovery in wireless communications. According to an embodiment of the present disclosure, a method performed by a wireless device served by a master node (MN) and a secondary node (SN) in a dual connectivity (DC) in a wireless communication system comprises: receiving information for a timer related to a fast master cell group (MCG) recovery and a conditional mobility attempt configuration; starting the timer related to the fast MCG recovery upon detecting a MCG failure; and based on detecting an expiry of the timer related to the fast MCG recovery: removing one or more conditional mobility commands stored in the wireless device; and initiating a transmission of a radio resource control (RRC) re-establishment request message.

    METHOD AND APPARATUS FOR HANDLING MASTER CELL GROUP FAILURE IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20230239751A1

    公开(公告)日:2023-07-27

    申请号:US17925252

    申请日:2021-05-04

    CPC classification number: H04W36/00837 H04W36/305 H04W76/20

    Abstract: The present disclosure relates to handling a master cell group (MCG) failure in wireless communications. According to an embodiment of the present disclosure, a method performed by a wireless device in a wireless communication system comprises: receiving, from a source primary cell (PCell), a conditional mobility command including a mobility condition for a target PCell; starting a timer for a master cell group (MCG) failure recovery and transmitting MCG failure information related to the MCG failure recovery to a primary secondary cell (PSCell), based on detecting a radio link failure (RLF) on the source PCell; and based on that the mobility condition for the target PCell is satisfied while the timer is running: transmitting, to the PSCell, a new PCell indication informing a mobility from the source PCell to the target PCell; and performing a random access to the target PCell for the mobility.

    METHOD AND APPARATUS FOR TRANSMITTING RESPONSE MESSAGE IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20220377626A1

    公开(公告)日:2022-11-24

    申请号:US17627513

    申请日:2021-02-15

    Abstract: The present disclosure relates to transmitting a response message in wireless communications. According to an embodiment of the present disclosure, a method performed by a wireless device served by a master node (MN) and a secondary node (SN) in a dual connectivity (DC) in a wireless communication system comprises: receiving, from the MN via a signalling radio bearer 1 (SRB1), a conditional primary secondary cell change (CPC) command related to a radio resource control (RRC) reconfiguration message of which a RRC transaction identifier (ID) is set; performing a CPC execution based on that a CPC condition in the CPC command is satisfied; and transmitting, to the MN, an RRC message of which no RRC transaction ID is set based on the CPC execution, wherein the RRC message comprises a RRC reconfiguration complete message of which the RRC transaction ID is set.

    METHOD AND APPARATUS FOR PERFORMING DATA TRANSMISSION UNDER PROCESSING ENHANCED HANDOVER IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20220104096A1

    公开(公告)日:2022-03-31

    申请号:US17310563

    申请日:2020-03-16

    Abstract: The present invention relates to a method for transmitting an uplink (UL) data by a user equipment (UE) in a wireless communication system. In particular, the method includes the steps of: transmitting the UL data to a first node based on a first Quality of Service (QoS) flow to data radio bearer (DRB) mapping rule; receiving, from the first node, a handover command including information related to a second QoS flow to DRB mapping rule; transmitting the UL data to the first node based on the first QoS flow to DRB mapping rule, until an UL data path is switched from the first node to the second node; and transmitting the UL data to the second node based on the second QoS flow to DRB mapping rule, after the UL data path is switched from the first node to the second node.

    SOURCE CELL COMMUNICATION CONTROL FOR DUAL PROTOCOL STACK MOBILITY

    公开(公告)号:US20220095191A1

    公开(公告)日:2022-03-24

    申请号:US17423983

    申请日:2020-03-25

    Abstract: A method and apparatus for source cell communication control for dual protocol stack mobility in a wireless communication system is provided. A target node receives, from a wireless device which is communicating with a source node, information related to a communication quality with the source node. The target node constructs a message including information related to communication of the source node with the wireless device, and transmits the message to the source node.

    METHOD FOR CHANGING STATUS OF WUS OPERATION AND DEVICE SUPPORTING THE SAME

    公开(公告)号:US20210227466A1

    公开(公告)日:2021-07-22

    申请号:US16772064

    申请日:2019-02-07

    Abstract: Provided are a method of changing status of WUS operation and a device supporting the method. According to one embodiment of the present disclosure, the method includes: receiving system information for enabling a wake up signal (WUS) operation; enabling the WUS operation; receiving a WUS to monitor a paging occasion; receiving, in the paging occasion, control information informing that the WUS operation is disabled; disabling the WUS operation based on the control information; and monitoring a next paging occasion for a paging based on the disabled WUS operation.

    METHOD FOR ESTIMATING MOBILITY STATE OF UE AND DEVICE SUPPORTING THE SAME

    公开(公告)号:US20210168691A1

    公开(公告)日:2021-06-03

    申请号:US16954189

    申请日:2019-02-07

    Abstract: Provided are a method of estimating mobility state of UE and a device supporting the method. According to one embodiment of the present disclosure, the method includes: receiving information on neighbor cell from a serving cell, wherein the information informs to which group the neighbor cell belongs; performing cell change from the serving cell to the neighbor cell; when the neighbor cell belongs to a first group, counting the cell change; when the neighbor cell belongs to a second group, skipping counting the cell change; and reporting a number of counted cell change for estimating mobility state of the UE, wherein the first group and the second group are configured based on altitude of the UE.

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