[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2023060445A1 - Équipement utilisateur, station de base source, station de base cible et procédés de transfert pour mobilité de mbs d'ue sans coupure - Google Patents

Équipement utilisateur, station de base source, station de base cible et procédés de transfert pour mobilité de mbs d'ue sans coupure Download PDF

Info

Publication number
WO2023060445A1
WO2023060445A1 PCT/CN2021/123352 CN2021123352W WO2023060445A1 WO 2023060445 A1 WO2023060445 A1 WO 2023060445A1 CN 2021123352 W CN2021123352 W CN 2021123352W WO 2023060445 A1 WO2023060445 A1 WO 2023060445A1
Authority
WO
WIPO (PCT)
Prior art keywords
mbs
mrb
drb
base station
leg
Prior art date
Application number
PCT/CN2021/123352
Other languages
English (en)
Inventor
Ahmed MOHAMMED MIKAEIL
Jia SHENG
Original Assignee
Huizhou Tcl Cloud Internet Corporation Technology Co.Ltd
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 Huizhou Tcl Cloud Internet Corporation Technology Co.Ltd filed Critical Huizhou Tcl Cloud Internet Corporation Technology Co.Ltd
Priority to CN202180103261.4A priority Critical patent/CN118104257A/zh
Priority to PCT/CN2021/123352 priority patent/WO2023060445A1/fr
Publication of WO2023060445A1 publication Critical patent/WO2023060445A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • the present disclosure relates to the field of wireless communication systems, and more particularly, to a user equipment (UE) , a source base station, a target base station, and handover methods for seamless and radio resource efficient UE MBS mobility, for example, particularly to a service continuity of a multicast-broadcast service (MBS) during a mobility from a radio access network (RAN) node supporting an MBS service to a RAN node not-supporting the MBS service and vice versa.
  • MBS multicast-broadcast service
  • broadcast and multicast services may be transported via a transport service called multimedia broadcast/multicast service (MBMS) .
  • MBMS multimedia broadcast/multicast service
  • a broadcast multicast service center (BM-SC) server is responsible to disseminate a media content to a group of subscribers.
  • BM-SC broadcast multicast service center
  • BM-SC broadcast multicast service center
  • MBMS is a point-to-multipoint (PTM) interface specification designed to provide efficient delivery of broadcast and multicast services within 3GPP cellular networks. Examples of MBMS interface specifications include those described in universal mobile telecommunication system (UMTS) and long term evolution (LTE) communication specifications.
  • UMTS universal mobile telecommunication system
  • LTE long term evolution
  • the specifications define transmission over single-frequency network configurations. Intended applications include mobile TV, news, radio broadcasting, file delivery, emergency alerts, and others.
  • MBMS multimedia broadcast/multicast service single frequency network
  • wireless communication devices such as cellular phones, tablets, laptops, and other devices with wireless transceivers that communicate with the base station within the communication system.
  • the base station provides wireless service to the wireless communication devices, sometimes referred to as mobile devices or UEs, within cells.
  • a user can access at least some multimedia services through a UE using either a point-to-point (PTP) connection or a PTM transmission.
  • PTP services can be provided using unicast techniques and PTM transmissions can be provided using MBMS communication, transmitted over an MBSFN or single cell point to multipoint (SC-PTM) communication.
  • PTP point-to-point
  • SC-PTM single cell point to multipoint
  • MBMS is provided using eMBMS. Accordingly, an MBMS service can be provided using either unicast service, MBSFN, or SC-PTM in an LTE system.
  • LTE long term evolution
  • RAN radio access network
  • MBS multicast/broadcast services
  • NR new radio
  • An object of the present disclosure is to propose a UE, a source base station, a target base station, and handover methods for seamless and radio resource efficient UE MBS mobility with efficient usage of radio interface resources.
  • a handover method for seamless and radio resource efficient UE MBS mobility performed by a UE includes transmitting, to a source base station, a handover control information and/or a measurement report containing an indication of UE interest on a multicast/broadcast service (MBS) service reception, receiving from the source base station, a handover command containing an associated data radio bearer (DRB) configuration, a point-to-point (PTP) MBS radio bearer (MRB) DRB packet data convergence protocol (PDCP) and/or radio link control (RLC) leg configuration, and/or a point to multipoint (PTM) MBS radio bearer MRB PDCP and/or RLC leg configuration, starting receiving an MBS data from the source base station via the associated DRB or PTP MRB/DRB PDCP and/or RLC leg until sending a handover complete message to the source base station or the target base station, stopping the reception of MBS service data via the associated DRB or the PTP MRB/DRB
  • a handover method for seamless and radio resource efficient MBS UE mobility performed by a source base station includes receiving, from a UE, a handover control information and/or a measurement report containing an indication of UE interest on receiving an MBS service, transmitting, to the UE, a handover command containing a configuration of an associated data radio bearer (DRB) , a point-to-point (PTP) MBS radio bearer (MRB) /DRB leg, and/or point to multipoint (PTM) MBS radio bearer, and starting transmitting an MBS service data to the UE via the associated DRB or the PTP MRB/DRB PDCP and/or RLC leg until receiving a handover complete message from the UE, and then, starting to receive MBs service data via an existing configured MRB or a configured PTM MRB PDCP and/or RLC leg.
  • DRB data radio bearer
  • PTP point-to-point
  • MRB MBS radio bearer
  • RLC leg point to multipoint
  • a handover method for seamless and radio resource efficient UE MBS mobility performed by a target base station includes receiving, from a source base station, a handover request including an indication of UE interest an MBS service on reception and configuring an associated MBS DRB on the top of an existing MBS MRB and/or a PTP DRB/MRB leg and/or a PTM MRB PDCP and/or RLC leg for the indicated MBS service of interest of the UE, transmitting the MBS service to the UE via a new configured associated MBS DRB or the PTP DRB/MRB leg, receiving a handover complete message from the UE, and then, switching the MBS service from the associated MBS DRB, the existing MBS MRB and/or the PTP DRB/MRB leg, and/or the PTM MRB PDCP and/or RLC leg.
  • a user equipment comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to perform the above method.
  • a source base station comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to perform the above method.
  • a target base station comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to perform the above method.
  • a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to perform the above method.
  • a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the above method.
  • a computer readable storage medium in which a computer program is stored, causes a computer to execute the above method.
  • a computer program product includes a computer program, and the computer program causes a computer to execute the above method.
  • a computer program causes a computer to execute the above method.
  • FIG. 1 is a schematic diagram illustrating an example of MBS data transmission and delivery methods according to an embodiment of the present disclosure.
  • FIG. 2 is a block diagram of one or more user equipments (UEs) , a source base station (e.g., source gNB) , a target base station (e.g., target gNB) of communication in a communication network system according to an embodiment of the present disclosure.
  • UEs user equipments
  • source base station e.g., source gNB
  • target base station e.g., target gNB
  • FIG. 3 is a flowchart illustrating a handover method for seamless and radio resource efficient UE MBS mobility performed by a UE according to an embodiment of the present disclosure.
  • FIG. 4 is a flowchart illustrating a handover method for seamless and radio resource efficient UE MBS mobility performed by a source base station according to an embodiment of the present disclosure.
  • FIG. 5 is a flowchart illustrating a handover method for seamless and radio resource efficient UE MBS mobility y performed by a target base station according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram illustrating an example of UEs side handover procedures according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram illustrating an example of source gNB side handover procedures according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram illustrating an example of target gNB side handover procedures according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram illustrating an example of UE mobility from a RAN node not-supporting MBS to a supporting node according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram illustrating an example of an MBS handover procedure form not supporting MBS to a target gNB supporting MBS, option A: configuration of a separate associated DRB according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram illustrating an example of an MBS handover procedure from a node not supporting MBS to a target gNB supporting MBS, option B: configuration of a PTP MRB PDCP and RLC leg from the existing MRB-split bearer according to an embodiment of the present disclosure.
  • FIG. 12 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram illustrating an example of MBS data transmission and delivery methods according to an embodiment of the present disclosure.
  • Multicast/broadcast services is expected to cover diversity of 5G applications and services ranging from public safety, mission critical, V2X, transparent IPv4/IPv6 multicast delivery, IPTV, software delivery over wireless to group communications and IoT applications.
  • MBS Multicast/broadcast services
  • a new working item is approved targeting the RAN support of MBS.
  • One of the main objectives of working item it to study and specify a specify support for basic mobility with service continuity for MBS capable UE [RAN2, RAN3] .
  • RAN2, RAN3 and SA2 the first one is the mobility from MBS supporting RAN node to an MBS RAN supporting RAN node, the second one is the mobility from a RAN supporting MBS to a RAN not supporting MBS, and the third one is the mobility from a RAN not-supporting MBS to a RAN node supporting MBS.
  • SA2 has specified the following two delivery methods of MBS user data from the core network (CN) as illustrated in FIG. 1. 1.
  • 5G CN receives a single copy of MBS data packets and delivers separate copies of those MBS data packets to individual UEs via per-UE PDU sessions, hence for each such UE one PDU session is required to be associated with a multicast session.
  • 2.5GC shared MBS traffic delivery 5G CN receives a single copy of MBS data packets and delivers a single copy of those MBS data packets to a RAN node.
  • SA2 has also specifies the support of switching between 5G CN shared MBS traffic delivery method and 5GC Individual MBS traffic delivery method.
  • RAN2 has specified a new radio bearer, apart from the data radio bearer (DRB) used for unicast delivery, to be used for MBS multicast/broadcast delivery; namely, MBS radio bearer (MRB) ( Figure 1) . Further, it has agreed to support the switching of MBS traffic data from MRB to DRB and vice versa during the mobility.
  • DRB data radio bearer
  • MBS radio bearer MBS radio bearer
  • a single MRB can be configured with a single point to point (PTP) PDCP and RLC leg or configured with a single point to multipoint (PTM) PDCP and RLC leg, or with a split-MRB containing both PTM and PTP PDCP and RLC legs.
  • PTP point to point
  • PTM point to multipoint
  • This disclosure provides a handover method performed by a user equipment (UE) , a source base station and a target base station to achieve the above goals.
  • UE user equipment
  • FIG. 2 illustrates that, in some embodiments, one or more user equipments (UEs) 10, a source base station (e.g., source gNB) 20, and a target base station (e.g., target gNB) 30 for communication in a communication network system 40 according to an embodiment of the present disclosure are provided.
  • the communication network system 40 includes the one or more UEs 10, the source base station 20, and the target base station.
  • the one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13.
  • the source base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23.
  • the target base station 30 may include a memory 32, a transceiver 33, and a processor 31 coupled to the memory 32 and the transceiver 33.
  • the processor 11, 21, or 31 may be configured to implement proposed functions, procedures and/or methods described in this description. Layers of radio interface protocol may be implemented in the processor 11, 21, or 31.
  • the memory 12, 22, or 32 is operatively coupled with the processor 11, 21, or 31 and stores a variety of information to operate the processor 11, 21, or 31.
  • the transceiver 13, 23, or 33 is operatively coupled with the processor 11, 21, or 31, and the transceiver 13, 23, or 33 transmits and/or receives a radio signal.
  • the processor 11, 21, or 31 may include application-specific integrated circuit (ASIC) , other chipset, logic circuit and/or data processing device.
  • the memory 12, 22, or 32 may include read-only memory (ROM) , random access memory (RAM) , flash memory, memory card, storage medium and/or other storage device.
  • the transceiver 13, 23, or 33 may include baseband circuitry to process radio frequency signals.
  • modules e.g., procedures, functions, and so on
  • the modules can be stored in the memory 12, 22, or 32 and executed by the processor 11, 21, or 31.
  • the memory 12, 22, or 32 can be implemented within the processor 11, 21, or 31 or external to the processor 11, 21, or 31 in which case those can be communicatively coupled to the processor 11, 21, or 31 via various means as is known in the art.
  • the transceiver 13 is configured to transmit, to the source base station 20, a handover control information and/or a measurement report containing an indication of UE interest on a multicast/broadcast service (MBS) service reception, the transceiver is configured to receive from the source base station 20, a handover command containing an associated data radio bearer (DRB) configuration, a point-to-point (PTP) MBS radio bearer (MRB) DRB packet data convergence protocol (PDCP) and/or radio link control (RLC) leg configuration, and/or a point to multipoint (PTM) MBS radio bearer MRB PDCP and/or RLC leg configuration, the transceiver is configured to start receiving an MBS data from the source base station 20 via the associated DRB or PTP MRB/DRB PDCP and/or RLC leg until sending a handover complete message to the source base station 20 or the target base station 30, stopping the reception of MBS service data via the associated DRB or the PTP MRB/DRB leg, and
  • DRB
  • the transceiver 23 is configured to receive, from the UE 10, a handover control information and/or a measurement report containing an indication of UE interest on receiving an MBS service, the transceiver 23 is configured to transmit, to the UE 10, a handover command containing a configuration of an associated data radio bearer (DRB) , a point-to-point (PTP) MBS radio bearer (MRB) /DRB leg, and/or point to multipoint (PTM) MBS radio bearer, the transceiver 23 is configured to start transmitting an MBS service data to the UE 10 via the associated DRB or the PTP MRB/DRB PDCP and/or RLC leg until receiving a handover complete message from the UE 10, and the transceiver 23 is configured to start to receive MBs service data via an existing configured MRB or a configured PTM MRB PDCP and/or RLC leg.
  • DRB data radio bearer
  • PTP point-to-point
  • MRB MBS radio bearer
  • the transceiver 33 is configured to receive, from the source base station 20, a handover request including an indication of UE interest an MBS service on reception and configuring an associated MBS DRB on the top of an existing MBS MRB and/or a PTP DRB/MRB leg and/or a PTM MRB PDCP and/or RLC leg for the indicated MBS service of interest of the UE 10, the transceiver 33 is configured to transmit the MBS service to the UE 10 via a new configured associated MBS DRB or the PTP DRB/MRB leg, the transceiver 33 is configured to receive a handover complete message from the UE 10, and then, the processor 33 is configured to switch the MBS service from the associated MBS DRB, the existing MBS MRB and/or the PTP DRB/MRB leg, and/or the PTM MRB PDCP and/or RLC leg.
  • FIG. 3 illustrates a handover method 300 for seamless and radio resource efficient UE MBS mobility performed by a UE includes according to an embodiment of the present disclosure.
  • the method 300 includes: a block 302, transmitting, to a source base station, a handover control information and/or a measurement report containing an indication of UE interest on a multicast/broadcast service (MBS) service reception, a block 304, receiving from the source base station, a handover command containing an associated data radio bearer (DRB) configuration, a point-to-point (PTP) MBS radio bearer (MRB) DRB packet data convergence protocol (PDCP) and/or radio link control (RLC) leg configuration, and/or a point to multipoint (PTM) MBS radio bearer MRB PDCP and/or RLC leg configuration, a block 306, starting receiving an MBS data from the source base station via the associated DRB or PTP MRB/DRB PDCP and/or RLC leg until sending a handover complete message to the
  • the handover method for seamless and radio resource efficient UE MBS mobility further comprises continuing receiving the MBS data from the source base station via the associated DRB until sending a handover complete message to a target base station and the source base station.
  • the handover method for UE seamless and radio resource efficient UE MBS mobility further comprises beginning receiving the MBS data via MRBs or the PTM MRB PDCP and/or RLC leg from the target base station after sending the handover complete message to the target base station and the source base station.
  • the UE transmits, to the source base station, the handover control information and/or the measurement report containing the indication of UE interest on receiving the MBS service during a UE mobility from the source base station to the target base station.
  • the indication of UE interest on receiving the MBS service comprises UE MBS service identifiers (IDs) or temporary mobile group identities (TMGIs) .
  • the PTP MRB/DRB leg comprises a PTP DRB/MRB packet data convergence protocol (PDCP) and radio link control (RLC) leg.
  • PDCP PTP DRB/MRB packet data convergence protocol
  • RLC radio link control
  • FIG. 4 illustrates a handover method 400 for seamless and radio resource efficient UE MBS mobility performed by a source base station includes according to an embodiment of the present disclosure.
  • the method 400 includes: a block 402, receiving, from a UE, a handover control information and/or a measurement report containing an indication of UE interest on receiving an MBS service, a block 404, transmitting, to the UE, a handover command containing a configuration of an associated data radio bearer (DRB) , a point-to-point (PTP) MBS radio bearer (MRB) /DRB leg, and/or point to multipoint (PTM) MBS radio bearer, a block 406, starting transmitting an MBS service data to the UE via the associated DRB or the PTP MRB/DRB PDCP and/or RLC leg until receiving a handover complete message from the UE, and a block 408, starting to receive MBs service data via an existing configured MRB or a configured PTM MRB PDCP and
  • the handover method for seamless and radio resource efficient UE MBS mobility further comprises transmitting, to a target base station, a handover request including the indication of UE interest on receiving the MBS service.
  • the handover method for seamless and radio resource efficient UE MBS mobility further comprises receiving, from the target base station, a handover acknowledgement containing the associated DRB, the PTP DRB/MRB leg, and/or the PTM MRB leg configured by the target base station.
  • the handover method for seamless UE MBS mobility further comprises continuing transmitting the MBS data to the UE via the associated DRB until receiving a handover complete message from the UE.
  • the source base station receives, from the UE, the handover control information and/or the measurement report containing the indication of UE interest on receiving the MBS service during a UE mobility from the source base station to the target base station.
  • the indication of UE interest on receiving the MBS service comprises UE MBS service identifiers (IDs) or temporary mobile group identities (TMGIs) .
  • the PTP MRB/DRB leg comprises a PTP DRB/MRB packet data convergence protocol (PDCP) and radio link control (RLC) leg.
  • PDCP PTP DRB/MRB packet data convergence protocol
  • RLC radio link control
  • FIG. 5 illustrates a handover method 500 for seamless and radio resource efficient UE MBS mobility performed by a target base station includes according to an embodiment of the present disclosure.
  • the method 500 includes: a block 502, receiving, from a source base station, a handover request including an indication of UE interest an MBS service on reception and configuring an associated MBS DRB on the top of an existing MBS MRB and/or a PTP DRB/MRB leg and/or a PTM MRB PDCP and/or RLC leg for the indicated MBS service of interest of the UE, a block 504, transmitting the MBS service to the UE via a new configured associated MBS DRB or the PTP DRB/MRB leg, a block 506, receiving a handover complete message from the UE, and a block 508, switching the MBS service from the associated MBS DRB, the existing MBS MRB and/or the PTP DRB/MRB leg, and/or the PTM MRB PDCP and/or RLC leg.
  • the handover method for seamless UE MBS mobility further comprises transmitting, to the source base station, a handover acknowledgement containing the associated DRB, the PTP DRB/MRB leg, and/or the PTM MRB leg.
  • the handover method for seamless UE MBS mobility further comprises continuing transmitting the MBS data to the UE via the source base station via the associated DRB until receiving a handover complete message from the UE.
  • the handover method for seamless UE MBS mobility further comprises beginning transmitting an MBS data via MRBs or the PTM MRB leg to the UE after receiving a handover complete message from the UE.
  • the handover method for seamless UE MBS mobility further comprises switching or releasing the associated DRB, the PTP DRB/MRB leg, and/or the PTM MRB leg.
  • the handover method for seamless UE MBS mobility y further comprises providing the MBS data to UE via the associated DRB, the PTP DRB/MRB leg, and/or the PTM MRB leg.
  • the indication of UE interest on receiving the MBS service comprises UE MBS service identifiers (IDs) or temporary mobile group identities (TMGIs) .
  • the PTP MRB/DRB leg comprises a PTP DRB/MRB packet data convergence protocol (PDCP) and radio link control (RLC) leg.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • FIG. 6 is a schematic diagram illustrating an example of UEs side handover procedures according to an embodiment of the present disclosure.
  • a UE sends a handover control information and/or a measurement report containing an indication of interest on receiving an MBS service.
  • the UE receives a handover command containing a configuration of an associated DRB or a PTP MRB/DRB leg and/or a PTM MRB leg and then starts receiving MBS data from a source gNB via the associated DRB or the PTP MRB/DRB leg.
  • the UE continues receiving MBS data from the source gNB via DRB until sending a handover complete message to a target gNB and the source gNB, and then the UE begins receiving MBS data via MRB bearers or a PTM MRB leg.
  • FIG. 7 is a schematic diagram illustrating an example of source gNB side handover procedures according to an embodiment of the present disclosure.
  • a source gNB receives a measurement report from UEs containing UE MBS service of interest IDs or TMGI. Then, the source gNB sends a handover request including the MBS service IDs and/or TMGIs which UE is interested to receive.
  • the source gNB receives a handover acknowledgement containing an associated DRB or a PTP DRB/MRB PDCP and RLC leg and a PTM MRB leg configurations configured by the target gNB.
  • the source gNB sends a handover command to UE containing the configurations of the target gNB MRB bearer, the PTP DRB/MRB leg and/or the PTM MRB leg. Then, the source gNB starts providing the MBs service to UE via MBS bearer until receiving a HO complete message.
  • FIG. 8 is a schematic diagram illustrating an example of target gNB side handover procedures according to an embodiment of the present disclosure.
  • a target gNB receives a handover request containing information about UE service of interest e.g., TMGI or service IDs from a source gNB. Then, the target gNB configures on the top of the existing MRB, an associated DRB or configure a PTP leg DRB for the respective TMGI or the service IDs.
  • the target gNB transmits a handover acknowledgment (ACK) message to the source gNB containing the existing MRB bearers or PTM leg MRB configuration in addition to the new configured associated DRB or new configured DRB over the PTP leg.
  • ACK handover acknowledgment
  • the target gNB provides MBS data to UE via the source DRB, until receive a handover complete, then, it switches or releases the configured DRB bearer or PTP leg and provides MBS data to UE directly via exiting MRB bearers or the PTM MRB leg to help utilizing RAN resources more efficiently.
  • FIG. 9 is a schematic diagram illustrating an example of UE mobility from a RAN node not-supporting MBS to a supporting node according to an embodiment of the present disclosure.
  • FIG. 9 illustrates that, in some embodiments, the method considers a scenario where an MBS capable UE is interested in receiving an MBS service in a source RAN node not supporting MBS services and moving to a target RAN node supporting MBS data service which is provided to it from 5g core network (CN) as given in FIG. 9.
  • CN 5g core network
  • a handover method including either configuring of a separate associated DRB bearer or configuring a PTP MRB/DRB PDCP and/or RLC leg apart from the existing PTM MRB leg for the UE to start MBS service data reception through it from the source before moving to target RAN that support MBS.
  • FIG. 10 is a schematic diagram illustrating an example of an MBS handover procedure form not supporting MBS to a target gNB supporting MBS, option A: configuration of a separate associated DRB according to an embodiment of the present disclosure.
  • FIG. 10 illustrates that, in some embodiments, Option A: Configuration of a separate associated DRB bearer is provided. This type of configuration assumes that the target gNB does not support MRB-split bearers.
  • the UE may indicate its interest on MBS service reception to the source gNB when moving to a target gNB node, and the source gNB may provide a handover request message to the target gNB containing the TMGI (es) or service IDs which UE is interested to receive during/after the handover.
  • Target gNB configures a new associated separate DRB with the service ids or TMGIs which UE is interested to receive. It may also provide or send the configurations of the newly configured associated DRB together with the configuration of the existing MRB bearers to source gNB via the handover acknowledgment (ACK) message to the source gNB.
  • ACK handover acknowledgment
  • the source gNB may forwards the configuration of associated DRB configuration (e.g., the radio network temporary identifier (C-RNTI) , logical channels identities (LCID) and physical channel configurations, target cell ID) and the configuration of the existing MRB bearers (e.g., Group RNTI (G-RNTI) and other configurations required for accessing target gNB) via the handover command message to UE.
  • C-RNTI radio network temporary identifier
  • LCID logical channels identities
  • target cell ID e.g., Group RNTI
  • UE may start receiving MBS data from the source gNB/cell before the handover via the associated DRB bearers until it sends a handover complete RRC configuration message to the target and/or source gNB. Then, the UE may start receiving the MBS service data via from the target gNB.
  • the target gNB may switch the MBS data from the associated unicast DRB bearers to the existing MRB bearer and provides the MBS data to UE via
  • FIG. 11 is a schematic diagram illustrating an example of an MBS handover procedure from a node not supporting MBS to a target gNB supporting MBS, option B: configuration of a PTP Leg MRB/DRP DPCP and RLC leg from the existing MRB-split bearer according to an embodiment of the present disclosure.
  • FIG. 11 illustrates that, in some embodiments, Option B: configuration of a PTP MRB/DRB PDCP and RLC leg from the existing MRB split bearer is provided. This type of configuration assumes that the target gNB does not support MRB-split bearers.
  • the UE may indicate its interest on MBS service reception to the source gNB when moving to a target gNB node, and the source gNB may provide a handover request message to the target gNB containing the TMGI (es) or service IDs which UE is interested to receive during/after the handover.
  • Target gNB may configure on the top of the existing point to multi-point (PTM) MRB PDCP and RLC leg, a new point to point (PTP) DRB/MRB PDCP RLC leg with the TMGIs or the service ids of which the UE is interested to receive.
  • PTM point to multi-point
  • PTP point to point
  • Target gNB provides configurations of the newly configured MRB or associated DRB PTP leg via the handover acknowledgment (ACK) message to the source gNB.
  • the target gNB may also provide the configuration of the existing PTM MRB RLC leg together with the configuration of the MRB or the associated DRB point to point (PTP) RLC leg to the source gNB within the handover ACK message to the source gNB.
  • PTP point to point
  • the source gNB provides the configurations of the newly configured PTP MRB/DRB PDCP and RLC leg such as the radio network temporary identifier (C-RNTI) , logical channels identities (LCID) and physical channel configurations as well as the configuration of the existing PTM MRB leg (e.g., Group RNTI (G-RNTI) and other configurations required for accessing target gNB) via the handover command message to UE, so that the UE can access a cell in the target gNB without reading it’s system information.
  • C-RNTI radio network temporary identifier
  • LCID logical channels identities
  • G-RNTI Group RNTI
  • G-RNTI Group RNTI
  • the UE may start receiving MBS data from the source gNB/cell before the handover via the configured PTP MRB/DRB PDCP and RLC leg until sending a handover complete RRC reconfiguration message to the target and/or source gNB.
  • the target gNB may deactivate and/or release configurations of the PTP MRB/DRB PDCP and RLC leg or switches or changes it to PTM MRB PDCP and RLC leg for efficient utilization of the radio interface recourses and starts providing MBS data via the exiting PTM MRB RLC leg to UE.
  • some embodiments of this disclosure provide an efficient handover method for UE mobility from a radio access network (RAN) node not supporting MBS service to a RAN node supporting multicast-broadcast service.
  • the UE indicates its interest in receiving of one or more MBS services to a source gNB that not supporting MBS, and the source gNB forwards a handover request message over Xn interface to a target gNB supporting MBS containing the MBS temporary mobile group identity TMGI (es) and/or service IDs which UE is interested to receive.
  • TMGI temporary mobile group identity
  • the target gNB may either configure a new associated separate unicast DRB bearers with the respective TMGI or service IDs if MRB split bearer is not supported by the target or configure a point to point (PTP) MRB/DRB packet data convergence protocol (PDCP) and radio link control (RLC) leg with the TMGIs and/or the service IDs that the UE is interested to receive. Further, it provides the respective configurations together with the configuration of the existing MRB bearers or PTM MRB PDCP and RLC leg to the UE through the source gNB via the handover command message.
  • PTP point to point
  • PDCP packet data convergence protocol
  • RLC radio link control
  • the UE in return, may start receiving the MBS data from the source gNB via the newly configured unicast associated DRB bearer or PTP MRB/DRB leg until it sends a handover complete RRC message to the target upon which the target gNB will for efficient utilization of the radio interface recourses, activate and/or release the configurations of the associated unicast DRB bearer or the PTP MRB/DRB leg or switch the UE service of interest it to the existing MRB bearers or MRB PTM leg respectively. Then, the UE may start receiving MBS data via the exiting MRB bearers or MRB PTM leg.
  • This disclosure provides a new method for a handover for multicast-broadcast service (MBS) during the UE mobility from a radio access network (RAN) node not supporting MBS service to a RAN node supporting MBS service.
  • MBS multicast-broadcast service
  • the major advantages of the new method compared to prior art include: 1.
  • the new method allows UE to receive MBS services during the mobility from a source RAN node not-supporting MBS service to a target RAN node supporting MBS service. 2.
  • the new method preconfigures UE with the required configuration for receiving MBS before mobility to target RAN which could minimize UE service interruption during the handover process. 3.
  • the new method allows UE to start receiving of MBS service from the source RAN node before moving to the target gNB which could reduce the time for accessing MBS service after UE indicating an interest in MBS reception to source RAN node. 4.
  • the new method allows the switching of MBS reception from the unicast radio bearers to multicast radio during or after the handover completion which could increase the network and radio interface efficiency as per working item and SA2 requirements on R17 MBS.
  • This disclosure provides a new method for a handover for service continuity of multicast-broadcast service (MBS) during the mobility from a radio access network (RAN) node not supporting MBS service to a RAN node supporting MBS service:
  • the major innovative aspects of the new handover method includes: 1.
  • the new method proposes to include an indication about UE service of interest to a RAN node not supporting MBS service to assist the target gNB in providing the suitable configuration for MBS reception to UE. 2.
  • the new method proposes to provide the configuration of either MRB and DRB or MRB PTP and PTM PDCP and/or RLC leg to the UE before moving from so that UE can reconfigure itself during the handover without additional signalling. 3.
  • the new method preconfigures UE with the required configuration for receiving MBS before mobility to target RAN which could minimize UE service interruption during the handover process. 4.
  • the new method allows UE to start receiving of MBS service from the source before moving to the target gNB which could reduce the time for accessing MBS service after indicating an interest in MBS reception. 5.
  • the new method allows the switching of MBS reception from the unicast radio bearers to multicast radio during or after the handover completion which could increase the network and radio interface efficiency as per working item and SA2 requirements on R17 MBS.
  • FIG. 12 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and/or software.
  • FIG. 12 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory/storage 740, a display 750, a camera 760, a sensor 770, and an input/output (I/O) interface 780, coupled with each other at least as illustrated.
  • the application circuitry 730 may include a circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors.
  • the processors may be coupled with the memory/storage and configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems running on the system.

Landscapes

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

Abstract

L'invention concerne un équipement utilisateur (UE), une station de base source, une station de base cible et des procédés de transfert pour une mobilité de MBS d'UE sans coupure et efficace en ressources radio. Le procédé de transfert mis en œuvre par l'UE consiste à transmettre, à une station de base source, des informations de commande de transfert et/ou un rapport de mesure contenant une indication d'intérêt d'UE sur une réception de service MBS, recevoir, en provenance de la station de base source, une instruction de transfert, démarrer la réception d'une donnée MBS à partir de la station de base source par l'intermédiaire de la DRB ou la branche PTP MRB/DRB PDCP et/ou RLC associée jusqu'à l'envoi d'un message d'achèvement de transfert à la station de base source ou à la station de base cible, arrêter la réception de données de service MBS par l'intermédiaire de la DRB ou de la branche PTP MRB/DRB et démarrer la réception des données de service MBS par l'intermédiaire d'une MRB ou d'une branche de PTM MRB PDCP et/ou RLC configurées existantes.
PCT/CN2021/123352 2021-10-12 2021-10-12 Équipement utilisateur, station de base source, station de base cible et procédés de transfert pour mobilité de mbs d'ue sans coupure WO2023060445A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202180103261.4A CN118104257A (zh) 2021-10-12 2021-10-12 用户设备、源基站、目标基站和用于无缝ue mbs移动性的切换方法
PCT/CN2021/123352 WO2023060445A1 (fr) 2021-10-12 2021-10-12 Équipement utilisateur, station de base source, station de base cible et procédés de transfert pour mobilité de mbs d'ue sans coupure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/123352 WO2023060445A1 (fr) 2021-10-12 2021-10-12 Équipement utilisateur, station de base source, station de base cible et procédés de transfert pour mobilité de mbs d'ue sans coupure

Publications (1)

Publication Number Publication Date
WO2023060445A1 true WO2023060445A1 (fr) 2023-04-20

Family

ID=85987907

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/123352 WO2023060445A1 (fr) 2021-10-12 2021-10-12 Équipement utilisateur, station de base source, station de base cible et procédés de transfert pour mobilité de mbs d'ue sans coupure

Country Status (2)

Country Link
CN (1) CN118104257A (fr)
WO (1) WO2023060445A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021098123A1 (fr) * 2020-04-08 2021-05-27 Zte Corporation Continuité de service de diffusion et multidiffusion pendant une mobilité
CN113271553A (zh) * 2020-02-14 2021-08-17 株式会社Kt 用于处理组播/广播服务数据的方法及其设备

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113271553A (zh) * 2020-02-14 2021-08-17 株式会社Kt 用于处理组播/广播服务数据的方法及其设备
WO2021098123A1 (fr) * 2020-04-08 2021-05-27 Zte Corporation Continuité de service de diffusion et multidiffusion pendant une mobilité

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CHENGDU TD TECH, TD TECH: "Service continuity for delivery mode 1", 3GPP DRAFT; R2-2108032, vol. RAN WG2, 6 August 2021 (2021-08-06), pages 1 - 5, XP052034597 *
CMCC: "Discussion on Mobility between MBS Supporting and non-MBS Supporting Nodes", 3GPP DRAFT; R3-214098, vol. RAN WG3, 6 August 2021 (2021-08-06), pages 1 - 4, XP052035732 *
NEC: "Service Continuity for Connected mode UE", 3GPP DRAFT; R2-2107703, vol. RAN WG2, 5 August 2021 (2021-08-05), pages 1 - 4, XP052032364 *

Also Published As

Publication number Publication date
CN118104257A (zh) 2024-05-28

Similar Documents

Publication Publication Date Title
EP2737734B1 (fr) Identification de résultats de comptage d'ue dans un EMBMS
EP2949165B1 (fr) Envoi de contenu à des dispositifs
WO2013023558A1 (fr) Procédé d'indication de statut de réception de mbms de sorte à assurer une continuité de service
US20160150590A1 (en) Method and system for indicating a multicast session to user equipment (ue) in an idle mode
US20230247401A1 (en) Communication method and apparatus
KR20230095948A (ko) 5g 무선 네트워크에서 멀티캐스트 및 브로드캐스트 서비스를 위한 관심 인디케이션을 송신하는 방법 및 시스템
US20230361923A1 (en) Mbs service configuration method and terminal device
CN104284299A (zh) 集群多播决策方法、集群终端及集群服务器
US20230137551A1 (en) Method and apparatus for managing mbs service, terminal device and network device
CN113661722B (zh) 一种业务数据传输方法及装置、网络设备、终端设备
WO2022141255A1 (fr) Procédé et appareil de configuration mbs, dispositif de réseau et dispositif de terminal
CN116711371A (zh) 用于mbs的无线通信的装置和方法
WO2023060445A1 (fr) Équipement utilisateur, station de base source, station de base cible et procédés de transfert pour mobilité de mbs d'ue sans coupure
US20240064488A1 (en) Mbsfn area inner and outer sai for seamless mobility
WO2023060407A1 (fr) Équipement utilisateur, station de base source, station de base cible et procédés de transfert intercellulaire pour une mobilité de mbs d'ue avec continuité de service
US10924892B2 (en) Group communications method, device, and system
WO2023197152A1 (fr) Procédés de communication sans fil pour service de multidiffusion/diffusion et appareils associés
WO2024065767A1 (fr) Procédés de communication sans fil pour service de multidiffusion/diffusion et appareils associés
WO2024065757A1 (fr) Procédés de communication sans fil pour service de multidiffusion/diffusion et appareils associés
CN116744240A (zh) 一种mbs业务的接收方法及装置、终端设备
CN114846825B (zh) 一种数据转发方法及装置、通信设备
WO2022165720A1 (fr) Procédé et appareil pour améliorer la fiabilité d'un service mbs, dispositif de terminal et dispositif de réseau
WO2022226937A1 (fr) Procédé et appareil de radiomessagerie mbs, dispositif de réseau et dispositif terminal
GB2622352A (en) Communication System
WO2024048772A1 (fr) Procédé de communication et dispositif d'utilisateur

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: 21960194

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202180103261.4

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21960194

Country of ref document: EP

Kind code of ref document: A1