METHOD FOR SUPPORTING SMALL DATA TRANSMISSION IN CONSIDERATION OF MOBILITY OF TERMINAL IN SEPARATE BASE STATION

    公开(公告)号:US20240215097A1

    公开(公告)日:2024-06-27

    申请号:US18288920

    申请日:2022-05-03

    CPC classification number: H04W76/19 H04W76/20 H04W76/30

    Abstract: The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. According to an embodiment of the disclosure, a method of a first base station may be provided, the method comprising the steps of: receiving a radio resource control (RRC) resume message for small data transmission (SDT) from an RRC inactive terminal; transmitting a first message for requesting of a terminal context to a second base station, wherein the first message includes an SDT indicator; in case that the terminal context is not relocated for the SDT, receiving a second message including partial information of the entire context of the terminal, which is included in the second base station; and based on the partial information of the second message, transferring uplink data of the terminal to the second base station.

    METHOD AND DEVICE FOR CONDITIONALLY ADDING AND CHANGING CELL

    公开(公告)号:US20220369172A1

    公开(公告)日:2022-11-17

    申请号:US17765285

    申请日:2020-09-29

    Abstract: The present disclosure relates to a communication technique for merging IoT technology with a 5G communication system for supporting higher data transmission rates than 4G systems, and a system therefor. The present disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail business, security and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. In addition, the present disclosure relates to a method for adding or changing a cell, and a device for performing same.

    APPARATUS AND METHOD FOR SYNCHRONIZATION USING WIRELESS COMMUNICATION NETWORK IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20210329667A1

    公开(公告)日:2021-10-21

    申请号:US17360124

    申请日:2021-06-28

    Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as long term evolution (LTE). According to various embodiments of the disclosure, an operating method of a user plane function (UPF) in a wireless communication system and an apparatus therefor are provided. The operating method includes receiving a first parameter for clock synchronization from a base station, and performing the clock synchronization with a neighboring network system using the received first parameter and a second parameter. The first parameter may include information relating to a link delay time between the neighboring network system and a network system comprising the UPF, and a residence time of a terminal, a base station and the UPF of the network system comprising the UPF, and the second parameter may include information relating to a backhaul delay time between the base station and the UPF.

    METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20210321290A1

    公开(公告)日:2021-10-14

    申请号:US17224439

    申请日:2021-04-07

    Abstract: A method performed by a base station in a wireless communication system is provided. The method includes transmitting, by a control plane (CP) of a centralized unit (CU) of the base station, a bearer context modification request message to a user plane (UP) of the CU of the base station, wherein the bearer context modification request message includes information associated with a request for a packet data convergence protocol (PDCP) sequence number (SN) status, and transmitting, by the UP of the CU of the base station, based on the bearer context modification request message, a bearer context modification response message to the CP of the CU of the base station, wherein the bearer context modification response message includes information associated with the PDCP SN status and information associated with at least one QoS flow, of which a service data adaptation protocol (SDAP) end marker is not received by the UP of the CU.

    METHOD FOR SUPPORTING EFFICIENT PDU SESSION ACTIVATION AND DEACTIVATION IN CELLULAR NETWORKS

    公开(公告)号:US20210076347A1

    公开(公告)日:2021-03-11

    申请号:US17100434

    申请日:2020-11-20

    Abstract: A communication method and system converges a 5G communication system for supporting higher data rates beyond a 4G system with an IoT technology. The system and method 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. Embodiments provide a scheme for efficiently operating an UP connection of a session in case where a terminal has a plurality of sessions in a mobile communication system, such as a 5G system, having a network structure in which an AMF for mobility management and an SMF for session management are separated from each other. A terminal (UE) can optimize a non-access stratum (NAS) signaling message, and can perform data transmission/reception with low latency.

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