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WO2017183897A1 - Procédé de transfert - Google Patents

Procédé de transfert Download PDF

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Publication number
WO2017183897A1
WO2017183897A1 PCT/KR2017/004171 KR2017004171W WO2017183897A1 WO 2017183897 A1 WO2017183897 A1 WO 2017183897A1 KR 2017004171 W KR2017004171 W KR 2017004171W WO 2017183897 A1 WO2017183897 A1 WO 2017183897A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
terminal
secondary base
handover
source
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2017/004171
Other languages
English (en)
Korean (ko)
Inventor
박현서
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electronics and Telecommunications Research Institute ETRI
Original Assignee
Electronics and Telecommunications Research Institute ETRI
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
Priority claimed from KR1020170050028A external-priority patent/KR102289949B1/ko
Priority claimed from KR1020170050029A external-priority patent/KR102294453B1/ko
Priority claimed from KR1020170050031A external-priority patent/KR102294454B1/ko
Priority claimed from KR1020170050030A external-priority patent/KR102109713B1/ko
Application filed by Electronics and Telecommunications Research Institute ETRI filed Critical Electronics and Telecommunications Research Institute ETRI
Priority to US16/082,599 priority Critical patent/US10945168B2/en
Priority to CN201780024631.9A priority patent/CN109076417A/zh
Publication of WO2017183897A1 publication Critical patent/WO2017183897A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H04W40/36—Modification of an existing route due to handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength

Definitions

  • the performing of the handover may further include transmitting a handover indication message to the source base station at the time of executing the handover.
  • the terminal may disconnect from the source base station regardless of the response to the handover indication message from the source base station.
  • the source base station 210 configures a terminal measurement procedure (S405). That is, the source base station 210 transmits a measurement control message to the terminal 230 (S405). Accordingly, the terminal 230 measures the signal strength of neighboring base stations and reports the measurement result to the source base station 210 through a measurement report message (S410). The source base station 210 determines the handover based on the measurement report and radio resource management (RRM) information managed by the source base station 210 (S415).
  • RRM radio resource management
  • the master base station 310 triggers a path update to complete the handover, that is, secondary cell change.
  • the master base station 310 transmits a radio access bearer modification indication (E-RAB modification indication) message to the MME 350 (S550), and the MME 350 sends a bearer modification to the gateway 340.
  • the message is transmitted (S555).
  • a radio access bearer (RAB) is illustrated as an E-RAB (evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (RAB) RAB).
  • E-RAB evolved universal mobile telecommunications system
  • RAB radio access network
  • the gateway 340 Upon receiving the bearer change message, the gateway 340 transmits an end marker packet on the old path to the source secondary base station 321, and the end marker packet is delivered to the target secondary base station 322 via the master base station 310. (S560). In addition, the gateway 340 switches the path to the target secondary base station 322 (S565). Data may be exchanged through the newly configured gateway
  • 6B, 6C, 6D and 6E are diagrams illustrating a handover method according to another embodiment of the present invention, respectively.
  • the target base station 220 may transmit an uplink allocation to the terminal 230 after receiving the handover indication message from the source base station 210.
  • the source base station 210 may activate uplink SPS configuration.
  • the source base station 210 may activate uplink SPS configuration explicitly through downlink assignment.
  • the downlink allocation may be transmitted through a downlink control channel, for example, a downlink physical downlink control channel.
  • the terminal 230 may consider the uplink SPS resource to be activated and transmit a handover indication message using the uplink SPS resource.
  • source base station 210 may implicitly activate uplink SPS configuration when transmitting an RRC connection reconfiguration message.
  • the uplink SPS configuration information of the target base station 220 may follow the SPS-ConfigUL defined in the SPS-Config information element of 3GPP TS 36.331.
  • the target base station 220 may transmit the uplink SPS configuration information to the source base station 210 so that the source base station 210 may transmit the uplink SPS configuration information of the target base station 220 to the terminal 230. Can be. In this case, the target base station 220 may deliver uplink SPS configuration information through a handover request confirmation message.
  • the terminal 330 After transmitting the secondary base station change instruction message (S960), the terminal 330 disconnects from the source secondary base station 321 by disconnecting from the source secondary base station 321 (S970a), and with the target secondary base station 322 Start connection (S970b).
  • the source secondary base station 321 receiving the secondary base station change instruction stops data transmission to the terminal 330 and starts data forwarding to the target secondary base station 322 via the master base station 310 (S980a, S980b). ). In some embodiments, data forwarding may begin as soon as the source secondary base station 321 receives the secondary base station change indication message.
  • the source secondary base station 321 transmits an SN status transfer message to the target secondary base station 322 via the master base station 310 (S980a, S980b).
  • the data forwarding request procedure S931, S931a, S931b may be omitted. For example, if there is little interface delay between base stations, the data forwarding request procedure may be omitted. In this case, data forwarding may begin after the source secondary base station 321 receives the handover indication message.
  • the terminal After transmitting the secondary base station change instruction, the terminal disconnects from the source secondary base station 321 to separate from the source secondary base station 321 (S972).
  • the source secondary base station 321 receiving the secondary base station change instruction stops data transmission to the terminal 330 and continues data forwarding to the target secondary base station 322 (S982a and S982b).
  • the source secondary base station 321 transmits an SN status transfer message to the target secondary base station 322 via the master base station 310 (S982a and S982b).
  • the terminal 330 may send a secondary base station change indication to the source secondary base station 321.
  • the terminal 330 may transmit a secondary base station change indication to the source secondary base station 321 immediately before transmitting the RRC connection reconfiguration complete message to the target secondary base station 322.
  • the source secondary base station 321 receiving the secondary base station change instruction stops data transmission to the terminal 330 and starts data forwarding to the target secondary base station 322 via the master base station 310 (S980a, S980b). ).
  • the source secondary base station 321 transmits an SN status transfer message to the target secondary base station 322 via the master base station 310 (S980a and S980b).
  • the terminal 330 disconnects from the source secondary base station 321 by disconnecting from the source secondary base station 321 (S970a).
  • the terminal 330 performs an access procedure, for example, a random access procedure, with the target secondary base station 322 (S990).
  • the container included in the handover request confirmation message may include a timing advance indication.
  • the timing advance indication may be transmitted from the source base station 210 to the terminal 230 through the RRC connection reconfiguration message.
  • the terminal 330 when the Make-Before-Break SC is set, the terminal 330 transmits an RRC connection reconfiguration complete message to the master base station 310 to the master base station 310 immediately before the secondary base station change to perform the execution of the secondary base station change. It may be informed (S1740). Unlike this, the terminal 330 may inform the secondary base station change execution by transmitting a secondary base station change indication message to the master base station 310 (S1760a). In an embodiment, when the RRC connection reconfiguration complete message cannot be transmitted immediately before the secondary base station change, the terminal 330 may transmit a secondary base station change indication message. After determining the timing of the secondary base station change, the terminal 330 disconnects from the source secondary base station 321 and synchronizes with the target secondary base station 322.
  • the time point of the secondary base station change may be after the typical data forwarding delay after the terminal 330 receives the ACK for the secondary base station change indication message. have.
  • the UE 330 may receive an uplink grant through the SR procedure and transmit an uplink signal to resources allocated through the uplink grant. have.
  • the terminal 330 when the terminal 330 does not receive the downlink control channel for a predetermined time after accessing the target secondary base station 322, disables the RACH-less SC and the target The random access procedure to the secondary base station 322 may be performed.
  • the terminal 330 synchronizes with the target secondary base station 322.
  • the terminal 330 may perform a random access procedure after synchronization (S1790).
  • the target secondary base station 322 receives the secondary base station reconfiguration complete message from the master base station 310 (S1750), for the initial uplink transmission of the terminal 330
  • the uplink grant may be transmitted to the terminal 330 (S1751).
  • the source base station transmits an SN status transfer message to the target base station after transmitting a handover command to the terminal, and starts data forwarding.
  • the source base station may transmit the sequence number of the next downlink PDCP to be transmitted by the target base station, and may transmit the PDCP SDU not received by the terminal to the target base station according to the downlink PDCP reception state of the terminal.
  • the source base station may transmit the data received from the gateway to the target base station without the sequence number.
  • the source base station receives the termination marker from the gateway, it may deliver it to the target base station.
  • FIG. 18 is a diagram illustrating an SN state transfer message and downlink data forwarding in the conventional handover method.
  • the source base station 210 continuously transmits downlink data to the terminal 230 after transmitting a handover command to the terminal 230.
  • the terminal 230 may perform an access procedure to another base station while communicating with one base station or may communicate with two or more base stations, and may be connected to two or more base stations.
  • the source base station 210 transmits the PDCP SDU which the terminal did not receive to the target base station 220 according to the downlink PDCP SN reception state of the terminal 230.
  • SDUs of SN # 1, # 3, and # 5 may be forwarded to the target base station 220.

Landscapes

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

Abstract

La présente invention concerne un terminal qui reçoit une commande de transfert provenant d'une station de base source et transmet un message d'indication de transfert à la station de base source dans un état de maintien d'une connexion avec la station de base source. Après la transmission du message d'indication de transfert, le terminal déconnecte la connexion avec la station de base source. Le terminal accède également à une station de base cible. La commande de transfert comprend des informations indiquant une avance temporelle lorsqu'un transfert qui n'effectue pas de procédure d'accès aléatoire est établi.
PCT/KR2017/004171 2016-04-20 2017-04-19 Procédé de transfert Ceased WO2017183897A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US16/082,599 US10945168B2 (en) 2016-04-20 2017-04-19 Handover method
CN201780024631.9A CN109076417A (zh) 2016-04-20 2017-04-19 切换方法

Applications Claiming Priority (22)

Application Number Priority Date Filing Date Title
KR20160048415 2016-04-20
KR10-2016-0048415 2016-04-20
KR20160050852 2016-04-26
KR10-2016-0050852 2016-04-26
KR10-2016-0062853 2016-05-23
KR20160062853 2016-05-23
KR10-2016-0100057 2016-08-05
KR20160100057 2016-08-05
KR10-2016-0116367 2016-09-09
KR20160116367 2016-09-09
KR20160126982 2016-09-30
KR10-2016-0126982 2016-09-30
KR20160136715 2016-10-20
KR10-2016-0136715 2016-10-20
KR1020170050028A KR102289949B1 (ko) 2016-04-20 2017-04-18 핸드오버 방법
KR10-2017-0050028 2017-04-18
KR10-2017-0050030 2017-04-18
KR1020170050029A KR102294453B1 (ko) 2016-05-23 2017-04-18 핸드오버 방법
KR10-2017-0050031 2017-04-18
KR1020170050031A KR102294454B1 (ko) 2016-09-09 2017-04-18 핸드오버 방법
KR1020170050030A KR102109713B1 (ko) 2016-08-05 2017-04-18 핸드오버 방법
KR10-2017-0050029 2017-04-18

Publications (1)

Publication Number Publication Date
WO2017183897A1 true WO2017183897A1 (fr) 2017-10-26

Family

ID=60116115

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2017/004171 Ceased WO2017183897A1 (fr) 2016-04-20 2017-04-19 Procédé de transfert

Country Status (1)

Country Link
WO (1) WO2017183897A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210176775A1 (en) * 2016-11-03 2021-06-10 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. User equipment, base station, wireless communication network, data signal and method to provide enhanced sps control and continuous sps after handover
CN113115390A (zh) * 2018-09-27 2021-07-13 Oppo广东移动通信有限公司 一种数据传输方法、终端设备及网络设备
US11082903B2 (en) 2018-12-03 2021-08-03 Electronics And Telecommunications Research Institute Method for handover in non-terrestrial network, and apparatus for the same
US20210289414A1 (en) * 2018-11-29 2021-09-16 Huawei Technologies Co., Ltd. Information transmission method and apparatus
CN114731542A (zh) * 2019-11-12 2022-07-08 上海诺基亚贝尔股份有限公司 增强的切换和定时提前对齐

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KR20120032296A (ko) * 2010-09-28 2012-04-05 주식회사 케이티 무선통신시스템에서 핸드오버 결정 방법 및 이를 위한 기지국
KR20120087649A (ko) * 2011-01-28 2012-08-07 삼성전자주식회사 중복된 애크를 이용한 통신 방법
KR101265624B1 (ko) * 2006-08-30 2013-05-22 엘지전자 주식회사 휴대 인터넷 시스템에서의 이동통신 단말기의 핸드오버수행 방법 및 이를 이용한 이동통신 단말기
KR20140051839A (ko) * 2011-03-28 2014-05-02 엘지전자 주식회사 이동통신 시스템에서 핸드오버 방법 및 장치
KR20150106422A (ko) * 2013-02-08 2015-09-21 닛본 덴끼 가부시끼가이샤 핸드오버 실패 검출 장치, 핸드오버·파라미터 조정 장치, 및 핸드오버 최적화 시스템

Patent Citations (5)

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KR101265624B1 (ko) * 2006-08-30 2013-05-22 엘지전자 주식회사 휴대 인터넷 시스템에서의 이동통신 단말기의 핸드오버수행 방법 및 이를 이용한 이동통신 단말기
KR20120032296A (ko) * 2010-09-28 2012-04-05 주식회사 케이티 무선통신시스템에서 핸드오버 결정 방법 및 이를 위한 기지국
KR20120087649A (ko) * 2011-01-28 2012-08-07 삼성전자주식회사 중복된 애크를 이용한 통신 방법
KR20140051839A (ko) * 2011-03-28 2014-05-02 엘지전자 주식회사 이동통신 시스템에서 핸드오버 방법 및 장치
KR20150106422A (ko) * 2013-02-08 2015-09-21 닛본 덴끼 가부시끼가이샤 핸드오버 실패 검출 장치, 핸드오버·파라미터 조정 장치, 및 핸드오버 최적화 시스템

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210176775A1 (en) * 2016-11-03 2021-06-10 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. User equipment, base station, wireless communication network, data signal and method to provide enhanced sps control and continuous sps after handover
CN113115390A (zh) * 2018-09-27 2021-07-13 Oppo广东移动通信有限公司 一种数据传输方法、终端设备及网络设备
JP2022501888A (ja) * 2018-09-27 2022-01-06 オッポ広東移動通信有限公司Guangdong Oppo Mobile Telecommunications Corp., Ltd. データ伝送方法、端末装置及びネットワーク装置
US11516726B2 (en) 2018-09-27 2022-11-29 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Data transmission method, terminal device and network device
JP7431219B2 (ja) 2018-09-27 2024-02-14 オッポ広東移動通信有限公司 データ伝送方法、端末装置及びネットワーク装置
US20210289414A1 (en) * 2018-11-29 2021-09-16 Huawei Technologies Co., Ltd. Information transmission method and apparatus
US12457653B2 (en) * 2018-11-29 2025-10-28 Huawei Technologies Co., Ltd. Information transmission method and apparatus
US11082903B2 (en) 2018-12-03 2021-08-03 Electronics And Telecommunications Research Institute Method for handover in non-terrestrial network, and apparatus for the same
CN114731542A (zh) * 2019-11-12 2022-07-08 上海诺基亚贝尔股份有限公司 增强的切换和定时提前对齐

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