WO2023065123A1 - Procédé et appareil de transfert hiérarchique - Google Patents

Procédé et appareil de transfert hiérarchique Download PDF

Info

Publication number
WO2023065123A1
WO2023065123A1 PCT/CN2021/124769 CN2021124769W WO2023065123A1 WO 2023065123 A1 WO2023065123 A1 WO 2023065123A1 CN 2021124769 W CN2021124769 W CN 2021124769W WO 2023065123 A1 WO2023065123 A1 WO 2023065123A1
Authority
WO
WIPO (PCT)
Prior art keywords
relay node
processor
reconfiguration message
path switch
indication
Prior art date
Application number
PCT/CN2021/124769
Other languages
English (en)
Inventor
Lianhai WU
Ran YUE
Jing HAN
Haiming Wang
Min Xu
Jie Hu
Original Assignee
Lenovo (Beijing) Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lenovo (Beijing) Limited filed Critical Lenovo (Beijing) Limited
Priority to PCT/CN2021/124769 priority Critical patent/WO2023065123A1/fr
Publication of WO2023065123A1 publication Critical patent/WO2023065123A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/03—Reselecting a link using a direct mode connection
    • H04W36/033—Reselecting a link using a direct mode connection in pre-organised networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • Embodiments of the present disclosure generally relate to wireless communication technology, and more particularly to a hierarchical handover in a wireless communication system.
  • Wireless communication systems are widely deployed to provide various telecommunication services, such as telephony, video, data, messaging, broadcasts, and so on.
  • Wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power) .
  • Examples of wireless communication systems may include fourth generation (4G) systems, such as long term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may also be referred to as new radio (NR) systems.
  • 4G systems such as long term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A Pro systems
  • 5G systems which may also be referred to as new radio (NR) systems.
  • a user equipment may communicate with another UE via a data path supported by an operator's network, e.g., a cellular or a Wi-Fi network infrastructure.
  • the data path supported by the operator's network may include a base station (BS) and multiple gateways.
  • BS base station
  • Some wireless communication systems may support sidelink communications, in which devices (e.g., UEs) that are relatively close to each other may communicate with one another directly via an SL, rather than being linked through the BS.
  • a relaying function based on a sidelink may be supported in a communication network.
  • a UE supporting sidelink communication may function as a relay node to extend the coverage of a BS.
  • An out-of-coverage UE may communicate with a BS via a relay UE.
  • a UE which functions as a relay between another UE and a BS, may be referred to a UE-to-network relay or a U2N relay.
  • the UE may include: a transceiver; and a processor coupled to the transceiver.
  • the processor may be configured to: receive, via a relay node from a base station (BS) , a reconfiguration message for path switch, wherein the reconfiguration message indicates to perform a path switch along with the relay node.
  • BS base station
  • the relay node may include: a transceiver; and a processor coupled to the transceiver.
  • the processor may be configured to: receive, from a base station (BS) , a reconfiguration message for path switch, wherein the reconfiguration message indicates to perform a path switch along with a user equipment (UE) which accesses the BS via the relay node.
  • BS base station
  • UE user equipment
  • the BS may include: a transceiver; and a processor coupled to the transceiver.
  • the processor may be configured to: transmit, to another BS, a handover request associated with a relay node and at least one user equipment (UE) , wherein the at least one UE accesses the BS via the relay node; and receive, from the another BS, an acknowledgement message in response to the handover request.
  • UE user equipment
  • the handover request associated with the relay node and the at least one UE may include: a single handover request for handing over both the relay node and the at least one UE to the another BS; or a plurality of handover requests including a first handover request for handing over the relay node to the another BS, and a respective second handover request for handing over a corresponding UE of the at least one UE to the another BS.
  • the first handover request may indicate information associated with the at least one UE.
  • the information associated with the at least one UE may include at least one of: a list of the at least one UE, the number of the at least one UE, traffic information of the at least one UE, or bit-rate information of the at least one UE.
  • the second handover request may indicate information associated with the relay node.
  • the information associated with the relay node may include an ID of the relay node.
  • the acknowledgement message may include a UE list indicating one or more UEs among the at least one UE which are allowed or un-allowed to be handed over to the another BS.
  • the acknowledgement message may indicate a maximum aggregated bit-rate.
  • the processor may be further configured to determine one or more UEs among the at least one UE to be handed over to the another BS based on the maximum aggregated bit-rate.
  • the processor may be further configured to perform at least one of the following in response to the acknowledgement message: transmit, to one of the at least one UE, a first reconfiguration message for path switch, wherein the first reconfiguration message indicates to perform a path switch along with the relay node; or transmit, to the relay node, a second reconfiguration message for path switch, wherein the second reconfiguration message indicates to perform a path switch along with one or more UEs of the at least one UE.
  • the second reconfiguration message may include an indication which indicates that all UEs served by the relay node are to be switched along with the relay node.
  • the second reconfiguration message includes a UE list which indicates the one or more UEs to be switched along with the relay node.
  • the BS may include: a transceiver; and a processor coupled to the transceiver.
  • the processor may be configured to: receive, from another BS, a handover request associated with a relay node and at least one user equipment (UE) , wherein the at least one UE accesses the another BS via the relay node; and transmit an acknowledgement message to the another BS in response to the handover request.
  • UE user equipment
  • the handover request associated with the relay node and the at least one UE may include: a single handover request for handing over both the relay node and the at least one UE to the BS; or a plurality of handover requests including a first handover request for handing over the relay node to the BS, and a respective second handover request for handing over a corresponding UE of the at least one UE to the BS.
  • the first handover request may indicate information associated with the at least one UE.
  • the information associated with the at least one UE may include at least one of: a list of the at least one UE, the number of the at least one UE, traffic information of the at least one UE, or bit-rate information of the at least one UE.
  • the second handover request may indicate information associated with the relay node.
  • the information associated with the relay node may include an ID of the relay node.
  • the acknowledgement message may include a UE list indicating one or more UEs among the at least one UE which are allowed or un-allowed to be handed over to the BS.
  • the acknowledgement message may indicate a maximum aggregated bit-rate.
  • Some embodiments of the present disclosure provide a method performed by a user equipment (UE) .
  • the method may include: receiving, via a relay node from a base station (BS) , a reconfiguration message for path switch, wherein the reconfiguration message indicates to perform a path switch along with the relay node.
  • BS base station
  • Some embodiments of the present disclosure provide a method performed by a relay node.
  • the method may include: receiving, from a base station (BS) , a reconfiguration message for path switch, wherein the reconfiguration message indicates to perform a path switch along with a user equipment (UE) which accesses the BS via the relay node.
  • BS base station
  • UE user equipment
  • Some embodiments of the present disclosure provide a method performed by a base station (BS) .
  • the method may include: transmitting, to another BS, a handover request associated with a relay node and at least one user equipment (UE) , wherein the at least one UE accesses the BS via the relay node; and receiving, from the another BS, an acknowledgement message in response to the handover request.
  • BS base station
  • UE user equipment
  • Some embodiments of the present disclosure provide a method performed by a base station (BS) .
  • the method may include: receiving, from another BS, a handover request associated with a relay node and at least one user equipment (UE) , wherein the at least one UE accesses the another BS via the relay node; and transmitting an acknowledgement message to the another BS in response to the handover request.
  • BS base station
  • UE user equipment
  • the apparatus may include: at least one non-transitory computer-readable medium having stored thereon computer-executable instructions; at least one receiving circuitry; at least one transmitting circuitry; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiving circuitry and the at least one transmitting circuitry, wherein the at least one non-transitory computer-readable medium and the computer executable instructions may be configured to, with the at least one processor, cause the apparatus to perform a method according to some embodiments of the present disclosure.
  • Embodiments of the present disclosure provide technical solutions to facilitate and improve the implementation of various communication technologies, such as 5G NR.
  • FIG. 1 illustrates a schematic diagram of a wireless communication system in accordance with some embodiments of the present disclosure
  • FIG. 2 illustrates a schematic diagram of a wireless communication system in accordance with some embodiments of the present disclosure
  • FIG. 3 illustrates a flow chart of an exemplary procedure of wireless communications in accordance with some embodiments of the present disclosure
  • FIG. 4 illustrates a flow chart of an exemplary procedure of wireless communications in accordance with some embodiments of the present disclosure.
  • FIG. 5 illustrates a block diagram of an exemplary apparatus in accordance with some embodiments of the present disclosure.
  • FIG. 1 illustrates a schematic diagram of a wireless communication system 100 in accordance with some embodiments of the present disclosure.
  • the wireless communication system 100 may support sidelink communications.
  • Sidelink communication supports UE-to-UE direct communication.
  • sidelink communications may be categorized according to the wireless communication technologies adopted.
  • sidelink communication may include NR sidelink communication and V2X Sidelink communication.
  • NR sidelink communications may refer to access stratum (AS) functionality enabling at least vehicle-to-everything (V2X) communications as defined in 3GPP specification TS 23.287 between neighboring UEs, using NR technology but not traversing any network node.
  • V2X sidelink communications (e.g., specified in 3GPP specification TS 36.311) may refer to AS functionality enabling V2X communications as defined in 3GPP specification TS 23.285 between neighboring UEs, using evolved-universal mobile telecommunication system (UMTS) terrestrial radio access (UTRA) (E-UTRA) technology, but not traversing any network node.
  • UMTS evolved-universal mobile telecommunication system
  • UTRA terrestrial radio access
  • sidelink communications may refer to NR sidelink communications, V2X sidelink communications, or any sidelink communications adopting other wireless communication technologies.
  • the wireless communication system 100 may include some base stations (e.g., BS 102 and BS 103) and some UEs (e.g., UE 101A, UE 101B, and UE 101C) . Although a specific number of UEs and BSs is depicted in FIG. 1, it is contemplated that any number of UEs and BSs may be included in the wireless communication system 100.
  • a BS e.g., BS 102 or BS 103
  • LTE long-term evolution
  • LTE-A LTE-advanced
  • NR new radio
  • a BS e.g., BS 102 or BS 103
  • a BS may be referred to as an access point, an access terminal, a base, a base unit, a macro cell, a Node-B, an evolved Node B (eNB) , a gNB, an ng-eNB, a Home Node-B, a relay node, or a device, or described using other terminology used in the art.
  • a UE may include, for example, but is not limited to, a computing device, a wearable device, a mobile device, an IoT device, a vehicle, etc.
  • a computing device e.g., a wearable device, a mobile device, an IoT device, a vehicle, etc.
  • the BS 102 and the BS 103 may be included in a next generation radio access network (NG-RAN) .
  • NG-RAN next generation radio access network
  • the BS 102 may be a gNB and the BS 103 may be an ng-eNB.
  • the UE 101A and UE 101B may be in-coverage (e.g., inside the NG-RAN) .
  • the UE 101A may be within the coverage of BS 102
  • the UE 101B may be within the coverage of BS 103.
  • the UE 101C may be out-of-coverage (e.g., outside the coverage of the NG-RAN) .
  • the UE 101C may be outside the coverage of any BSs, for example, both the BS 102 and BS 103.
  • the UE 101A and UE 101B may respectively connect to the BS 102 and BS 103 via a network interface, for example, the Uu interface as specified in 3GPP standard documents.
  • the control plane protocol stack in the Uu interface may include a radio resource control (RRC) layer, which may be referred to as a Uu RRC.
  • RRC radio resource control
  • the link established between a UE (e.g., UE 101A) and a BS (e.g., BS 102) may be referred to as a Uu link.
  • the BS 102 and BS 103 may be connected to each other via a network interface, for example, the Xn interface as specified in 3GPP standard documents.
  • the UE 101A, UE 101B, and UE 101C may be connected to each other respectively via, for example, a PC5 interface as specified in 3GPP standard documents.
  • the control plane protocol stack in the PC5 interface may include a radio resource control (RRC) layer, which may be referred to as a PC5 RRC.
  • RRC radio resource control
  • the link established between two UEs e.g., UE 101A and UE 101B
  • PC5 link may be referred to as a PC5 link.
  • NR sidelink communication can support one of the following three types of transmission modes for a pair of a source Layer-2 identity and a destination Layer-2 identity: unicast transmission, groupcast transmission, and broadcast transmission.
  • Sidelink communication transmission and reception over the PC5 interface are supported when the UE is either in-coverage or out-of-coverage.
  • the UE 101A which is within the coverage of the BS 102, can perform sidelink transmission and reception (e.g., sidelink unicast transmission, sidelink groupcast transmission, or sidelink broadcast transmission) over a PC5 interface.
  • the UE 101C which is outside the coverage of both the BS 102 and BS 103, can also perform sidelink transmission and reception over a PC5 interface.
  • a UE which supports sidelink communication and/or V2X communication may be referred to as a V2X UE.
  • a V2X UE may be a cell phone, a vehicle, a roadmap device, a computer, a laptop, an IoT (internet of things) device or other type of device in accordance with some other embodiments of the present disclosure.
  • the relaying function based on a sidelink may be supported in a communication network.
  • a UE-to-network relay is supported.
  • an in-coverage UE in communication with a remote UE e.g., an out-of-coverage UE
  • the remote UE may thus access the BS via this relay UE.
  • the data between the remote UE and the BS may be transferred by the relay UE.
  • the relay UE may be referred to as a serving relay of the remote UE, and the serving BS or serving cell of the relay UE is also the serving BS or serving cell of the remote UE.
  • FIG. 2 illustrates a schematic diagram of a wireless communication system 200 in accordance with some embodiments of the present disclosure.
  • the wireless communication system 200 may include a BS (e.g., BS 202) and some UEs (e.g., UE 201A and UE 201B) . Although a specific number of UEs and BS is depicted in FIG. 2, it is contemplated that any number of UEs and BSs may be included in the wireless communication system 200.
  • UE 201B may be within the coverage of BS 202.
  • UE 201B and BS 202 may establish an RRC connection therebetween.
  • UE 201A may be outside of the coverage of BS 202.
  • UE 201B may function as UE 101A or UE 101B shown in FIG. 1, and UE 201A may function as UE 101C shown in FIG. 1.
  • the wireless communication system 200 may support sidelink communications.
  • UE 201B may be in sidelink communication with UE 201A.
  • a PC5 RRC connection may be established between UE 201A and UE 201B.
  • UE 201A may initiate a procedure for establishing a connection with BS 202 via UE 201B (i.e., UE-to-network relay) .
  • UE 201A may transmit an RRC setup request to BS 202 via UE 201B.
  • BS 202 may transmit an RRC setup message including a response to UE 201A via UE 201B.
  • UE 201A may access BS 202 (e.g., a cell of BS 202) via UE 201B. This cell is referred to as the serving cell of UE 201A.
  • UE 201A and BS 202 may establish an RRC connection therebetween, and UE 201A may have RRC states, such as an RRC_IDLE state, an RRC_INACTIVE state, and an RRC_CONNECTED state.
  • UE 201A may also be referred to as a remote UE and UE 201B may also be referred to as a relay UE or a serving relay of UE 201A.
  • BS 202 may determine to hand over UE 201B from BS 202 (source BS) to another BS (target BS) .
  • BS 202 may determine to hand over both UE 201B and the UE served by UE 201B (e.g., UE 201A) to the target node.
  • FIGS. 3 and 4 illustrate flow charts of exemplary procedures for performing a handover in accordance with some embodiments of the present disclosure.
  • FIG. 3 illustrates a flow chart of an exemplary procedure 300 of wireless communications in accordance with some embodiments of the present disclosure. Details described in all of the foregoing embodiments of the present disclosure are applicable for the embodiments shown in FIG. 3.
  • UE 301A may access BS 302A via relay node 301B.
  • BS 302A and relay node 301B may be referred to as the serving BS of UE 301A and the serving relay of UE 301A, respectively.
  • Relay node 301B may also serve other UE (s) , which are not shown in FIG. 3.
  • another UE may also access BS 302A via relay node 301B.
  • UE 301A and relay node 301B may be configured with a measurement configuration and may report measurement results to BS 302A.
  • UE 301A may report measurement results to BS 302A via relay node 301B.
  • BS 302A may decide to hand over both relay node 301B and UE 301A to the same target cell.
  • BS 302A may decide to hand over all or some of the at least one UE served by relay node 301B along with relay node 301B.
  • BS 302A may transmit a handover request associated with relay node 301B and UE 301A to BS 302B.
  • BS 302A and BS 302B may be referred to as source BS and target BS, respectively.
  • BS 302A may transmit a single handover request for handing over both relay node 301B and all or some of the at least one UE (e.g., UE 301A) served by relay node 301B.
  • BS 302A may transmit separate handover requests for handing over relay node 301B and UE 301A, respectively.
  • BS 302A may transmit a handover request (hereinafter, handover request#1) for handing over relay node 301B.
  • Handover request#1 may include information associated with the at least one UE served by relay node 301B.
  • the information may include at least one of: a list of at least one UE served by relay node 301B, the number of the at least one UE, traffic information of the at least one UE, or bit-rate information of the at least one UE.
  • BS 302A can inform BS 302B of the remote UEs to be handed over along with relay node 301B.
  • BS 302A may transmit a handover request (hereinafter, handover request#2) for handing over the corresponding remote UE.
  • handover request#2 may indicate information associated with relay node 301B.
  • the information may indicate an ID of relay node 301B.
  • BS 302A can inform BS 302B that UE 301A is to be handed over along with relay node 301B.
  • BS 302B may determine whether to accept or reject the handover request. In some examples, BS 302B may accept the handover request for relay node 301B and all remote UEs served by relay node 301B. In some examples, BS 302B may reject some remote UEs served by relay node 301B. For examples, in response to the handover request, BS 302B may, in operation 317, transmit an acknowledgement message to BS 302A. In some examples, the acknowledgement message may include a UE list indicating one or more UEs among the at least one UE served by relay node 301B which are allowed or rejected to be handed over to BS 302B.
  • the acknowledgement message may indicate a maximum aggregated bit-rate for the remote UEs served by relay node 301B.
  • BS 302A may then determine one or more UEs among of the remote UEs to be handed over to BS 302B based on the maximum aggregated bit-rate.
  • the acknowledgement message may include reconfiguration messages for relay node 301B and the remote UE (s) allowed to be handed over to BS 302B.
  • the acknowledgement message may be transmitted via Xn interface between BS 302A and BS 302B.
  • the number of the acknowledgement messages may be based on the number of handover requests for handing over relay node 301B and the remote UEs served by relay node 301B. For example, when a single handover request is employed as described above, BS 302B may respond with a single acknowledgement message. Otherwise, when separate handover requests for handing over relay node 301B and the remote UEs served by relay node 301B are employed as described above, BS 302B may respond with a respective acknowledgement message for each handover request.
  • relay node 301B and UE 301A are allowed to be handed over to BS 302B.
  • BS 302A may, in operations 319 and 319’ , transmit a reconfiguration message for path switch to UE 301A via relay node 301B.
  • the reconfiguration message for path switch may indicate to perform a path switch along with a relay node (the serving relay node) .
  • UE 301A can know about the hierarchical handover. For example, UE 301A may be switched to a target cell after a successful path switch (or handover) of its serving relay node to the target cell.
  • UE 301A in response to the reception of the reconfiguration message, may apply the reconfiguration message.
  • UE 301A may transmit a reconfiguration complete message to relay node 301B.
  • Relay node 301B may transmit the reconfiguration complete message to BS 302B in operation 327.
  • operation 323 is shown between operations 321 and 325 in FIG. 3, it should be appreciated by persons skilled in the art that operation 323 can occur at any position between operations 319’ and 327.
  • UE 301A may apply the reconfiguration message after relay node 301B receives the path switch command, a successful path switch at relay node 301B, or relay node 301B has transmitted all downlink data associated with UE 301A buffered at relay node 301B to UE 301A.
  • relay node 301B may transmit an indication of a reception of a path switch command in response to receiving a reconfiguration message for path switch from BS 302A (e.g., in operation 321 as will be described later) .
  • relay node 301B may transmit an indication of a successful path switch in response to the successful path switch at relay node 301B.
  • UE 301A may continue to receive downlink data associated UE 301A buffered at relay node 301B from relay node 301B after the reception of the reconfiguration message.
  • Relay node 301B may transmit, to UE 301A, an indication of the completion of the transmission of the downlink data in response to a completion of the transmission of the downlink data.
  • Relay node 301B may transmit such indication to UE 301A via broadcast or dedicated radio resource control (RRC) signaling.
  • RRC radio resource control
  • relay node 301B may transmit a broadcast message indicating the reception of a path switch command or the successful handover. In this way, all remote UEs which have received the corresponding reconfiguration messages can apply the corresponding reconfiguration messages.
  • UE 301A may apply the reconfiguration message in response to the reception of the above indication from relay node 301B.
  • UE 301A may transmit the reconfiguration complete message to relay node 301B in response to applying the reconfiguration message.
  • relay node 301B may receive the reconfiguration complete message from UE 301A in response to the transmission of the above indication.
  • UE 301A in response to the reception of the reconfiguration message, may store the reconfiguration message. In some examples, in response to the reception of the reconfiguration message, UE 301A may transmit an indication or a suspend request to relay node 301B. The indication may indicate the path switch along with relay node 301B.
  • UE 301A may start a timer (hereinafter, “hierarchical handover timer” ) in response to the reception of the reconfiguration message for switching along with the serving relay.
  • UE 301A may stop the hierarchical handover timer in response to one of the following conditions: receiving, from relay node 301B, an indication for stopping the hierarchical handover timer (for example, the indication can be the indication of a successful path switch at relay node 301B) ; and transmitting the reconfiguration complete message.
  • BS 302A may transmit a reconfiguration message for path switch to relay node 301B.
  • the reconfiguration message for path switch may indicate to perform a path switch along with a remote UE served by relay node 301B.
  • the reconfiguration message for path switch may include an indication which indicates that all UEs served by the relay node are to be switched along with the relay node.
  • the reconfiguration message for path switch may include a UE list which indicates at least one UE to be switched along with the relay node.
  • Relay node 301B may transmit a release request to a remote UE which is served by relay node 301B but not indicated in the UE list.
  • relay node 301B may sync to the target cell as indicated in the reconfiguration message. For example, relay node 301B may start a timer to control the path switching procedure and may initiate a random access procedure. Relay node 301B may stop the timer in response to a successful random access to the target cell. In operation 329, relay node 301B may transmit a reconfiguration complete message to BS 302B in response to the successful random access.
  • BS 302B may perform a path switch procedure for relay node 301B and UE 301A with core network (CN) entity 303 (e.g., access and mobility management function (AMF) ) .
  • CN core network
  • AMF access and mobility management function
  • BS 302B may transmit a UE context release message for relay node 301B and UE 301A to BS 302A.
  • FIG. 4 illustrates a flow chart of an exemplary procedure 400 of wireless communications in accordance with some embodiments of the present disclosure. Details described in all of the foregoing embodiments of the present disclosure are applicable for the embodiments shown in FIG. 4.
  • UE 401A may access BS 402A via relay node 401B.
  • BS 402A may decide to hand over both relay node 401B and UE 401A to the same target cell.
  • BS 402A may transmit a handover request associated with relay node 401B and UE 401A to BS 402B.
  • BS 402B may transmit an acknowledgement message to BS 402A in response to the handover request.
  • BS 402A may, in operations 419 and 419’ , transmit a reconfiguration message for path switch to UE 401A via relay node 401B.
  • BS 402A may transmit a reconfiguration message for path switch to relay node 401B.
  • relay node 401B may fail to access the target cell.
  • relay node 401B may indicate, in operation 425 (denoted in a dotted arrow as an option) , the handover failure to a UE (s) (e.g., UE 401A) served by relay node 401B.
  • UE e.g., UE 401A
  • relay node 401B may perform a reestablishment procedure after the handover fails.
  • relay node 401B may indicate, in operation 425 (denoted in a dotted arrow as an option) , the recovery failure to a UE (s) (e.g., UE 401A) served by relay node 401B and may enter an idle mode.
  • relay node 401B may inform a UE (s) (e.g., UE 401A) served by relay node 401B of the successful reestablishment.
  • the handover timer as described above may expire.
  • UE 401A may initiate a reestablishment procedure in response to the expiry of the handover timer, the handover failure indication, or the recovery failure indication.
  • UE 401A may perform a cell selection procedure. For example, UE 401A may select a relay node or cell for reestablishment.
  • the target cell indicated in the reconfiguration message for path switch or the candidate relay served by the target cell can be preferentially selected. This is beneficial because the target cell already has the UE context of UE 401A, which can reduce the delay of reestablishment.
  • UE 401A may access the selected cell after the reestablishment procedure.
  • FIG. 5 illustrates a block diagram of an exemplary apparatus 500 according to some embodiments of the present disclosure.
  • the apparatus 500 may include at least one processor 506 and at least one transceiver 502 coupled to the processor 506.
  • the apparatus 500 may be a BS, a relay node or a UE.
  • the transceiver 502 may be divided into two devices, such as a receiving circuitry and a transmitting circuitry.
  • the apparatus 500 may further include an input device, a memory, and/or other components.
  • the apparatus 500 may be a UE.
  • the transceiver 502 and the processor 506 may interact with each other so as to perform the operations with respect to the UEs described in FIGS. 1-4.
  • the apparatus 500 may be a relay node.
  • the transceiver 502 and the processor 506 may interact with each other so as to perform the operations with respect to the relay nodes described in FIGS. 1-4.
  • the apparatus 500 may be a BS.
  • the transceiver 502 and the processor 506 may interact with each other so as to perform the operations with respect to the BSs described in FIGS. 1-4.
  • the apparatus 500 may further include at least one non-transitory computer-readable medium.
  • the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 506 to implement the method with respect to the UEs as described above.
  • the computer-executable instructions when executed, cause the processor 506 interacting with transceiver 502 to perform the operations with respect to the UEs described in FIGS. 1-4.
  • the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 506 to implement the method with respect to the relay nodes as described above.
  • the computer-executable instructions when executed, cause the processor 506 interacting with transceiver 502 to perform the operations with respect to the relay nodes described in FIGS. 1-4.
  • the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 506 to implement the method with respect to the BSs as described above.
  • the computer-executable instructions when executed, cause the processor 506 interacting with transceiver 502 to perform the operations with respect to the BSs described in FIGS. 1-4.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • the operations or steps of a method may reside as one or any combination or set of codes and/or instructions on a non-transitory computer-readable medium, which may be incorporated into a computer program product.
  • the terms “includes, “ “including, “ or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
  • An element proceeded by “a, “ “an, “ or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.
  • the term “another” is defined as at least a second or more.
  • the term “having” and the like, as used herein, are defined as "including.
  • Expressions such as “A and/or B” or “at least one of A and B” may include any and all combinations of words enumerated along with the expression.
  • the expression “A and/or B” or “at least one of A and B” may include A, B, or both A and B.
  • the wording "the first, " “the second” or the like is only used to clearly illustrate the embodiments of the present application, but is not used to limit the substance of the present application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention concernent un procédé et un appareil pour le transfert hiérarchique dans un système de communication sans fil. Selon certains modes de réalisation de l'invention, un équipement utilisateur (UE) peut recevoir, par l'intermédiaire d'un nœud relais d'une station de base (BS), un message de reconfiguration pour un changement de chemin, le message de reconfiguration indiquant d'effectuer un changement de chemin avec le nœud relais. Un nœud de relais peut recevoir, à partir d'une station de base, un message de reconfiguration pour un changement de chemin, dans lequel le message de reconfiguration indique d'effectuer un changement de chemin avec un UE qui accède à la station de base via le nœud de relais.
PCT/CN2021/124769 2021-10-19 2021-10-19 Procédé et appareil de transfert hiérarchique WO2023065123A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/124769 WO2023065123A1 (fr) 2021-10-19 2021-10-19 Procédé et appareil de transfert hiérarchique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/124769 WO2023065123A1 (fr) 2021-10-19 2021-10-19 Procédé et appareil de transfert hiérarchique

Publications (1)

Publication Number Publication Date
WO2023065123A1 true WO2023065123A1 (fr) 2023-04-27

Family

ID=86057865

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/124769 WO2023065123A1 (fr) 2021-10-19 2021-10-19 Procédé et appareil de transfert hiérarchique

Country Status (1)

Country Link
WO (1) WO2023065123A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140135006A1 (en) * 2011-11-11 2014-05-15 Research In Motion Limited Method and System for Mobile Relay Enablement
CN104509164A (zh) * 2012-01-27 2015-04-08 华为技术有限公司 多宿主移动中继
CN106961682A (zh) * 2017-03-28 2017-07-18 西安电子科技大学 一种基于移动中继的群到路径移动切换认证方法
CN109151928A (zh) * 2017-06-19 2019-01-04 华为技术有限公司 切换方法、装置和***
WO2021195647A2 (fr) * 2020-08-05 2021-09-30 Futurewei Technologies, Inc. Procédés et appareil de changement de liaison de connexion faisant intervenir des relais en liaison latérale

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140135006A1 (en) * 2011-11-11 2014-05-15 Research In Motion Limited Method and System for Mobile Relay Enablement
CN104509164A (zh) * 2012-01-27 2015-04-08 华为技术有限公司 多宿主移动中继
CN106961682A (zh) * 2017-03-28 2017-07-18 西安电子科技大学 一种基于移动中继的群到路径移动切换认证方法
CN109151928A (zh) * 2017-06-19 2019-01-04 华为技术有限公司 切换方法、装置和***
WO2021195647A2 (fr) * 2020-08-05 2021-09-30 Futurewei Technologies, Inc. Procédés et appareil de changement de liaison de connexion faisant intervenir des relais en liaison latérale

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
INTEL CORPORATION: "Service Continuity support for L2 U2N Relaying", 3GPP DRAFT; R2-2104891, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. e-Meeting; 20210519 - 20210527, 11 May 2021 (2021-05-11), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052006634 *

Similar Documents

Publication Publication Date Title
CN109076496B (zh) 用于改变终端连接状态的方法和装置
WO2022141202A1 (fr) Procédé et appareil de commutation de trajet conditionnelle dans un système de communication sans fil
US20210274486A1 (en) Method and device for transmitting control signaling, serving base station, and storage medium
WO2021253324A1 (fr) Procédé et appareil de communication sans fil
TW201931937A (zh) 處理新無線獨立網路的移動性的裝置及方法
WO2022126599A1 (fr) Procédé et dispositif de commutation de voies dans un système de communication sans fil
WO2022160117A1 (fr) Procédé et appareil de transfert et de rétablissement dans un système de communication sans fil
WO2023050182A1 (fr) Procédé et appareil de communication sans fil
WO2022126360A1 (fr) Procédé et dispositif de commutation de trajet dans un système de communication sans fil
WO2021232240A1 (fr) Procédé et appareil de communication sans fil
WO2023065123A1 (fr) Procédé et appareil de transfert hiérarchique
WO2022236632A1 (fr) Procédé et appareil de transfert de relais d'ue à réseau
WO2023197145A1 (fr) Procédé et appareil de communication sans fil
WO2023240626A1 (fr) Procédé et appareil de commutation de trajet
WO2024000382A1 (fr) Procédé et appareil de commutation de trajet
WO2023130213A1 (fr) Procédé et appareil de transfert
WO2023225918A1 (fr) Procédé et appareil d'un mécanisme amélioré pour une procédure de rétablissement rrc
WO2023205952A1 (fr) Procédé et appareil de communication sans fil
WO2023010409A1 (fr) Procédé et appareil de communication sans fil
WO2023168594A1 (fr) Procédé et appareil de communication sans fil
WO2024020890A1 (fr) Procédé et appareil pour un mécanisme de gestion de connexion dans un cas de relais u2n l2
WO2024060298A1 (fr) Procédé et appareil pour boîtier à trajets multiples
WO2023201525A1 (fr) Procédé et appareil pour le contrôle de conformité dans un système de communication
WO2022236612A1 (fr) Procédé et appareil d'acquisition d'informations de système
US20240244509A1 (en) Method and apparatus for system information acquisition

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21960882

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE