WO2014024851A1 - Station de base dans un système de communications mobiles et procédé de transfert de données - Google Patents

Station de base dans un système de communications mobiles et procédé de transfert de données Download PDF

Info

Publication number
WO2014024851A1
WO2014024851A1 PCT/JP2013/071175 JP2013071175W WO2014024851A1 WO 2014024851 A1 WO2014024851 A1 WO 2014024851A1 JP 2013071175 W JP2013071175 W JP 2013071175W WO 2014024851 A1 WO2014024851 A1 WO 2014024851A1
Authority
WO
WIPO (PCT)
Prior art keywords
transfer
base station
data
address
source
Prior art date
Application number
PCT/JP2013/071175
Other languages
English (en)
Japanese (ja)
Inventor
匠吾 矢葺
明人 花木
義夫 伊賀上
Original Assignee
株式会社 エヌ・ティ・ティ・ドコモ
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 株式会社 エヌ・ティ・ティ・ドコモ filed Critical 株式会社 エヌ・ティ・ティ・ドコモ
Publication of WO2014024851A1 publication Critical patent/WO2014024851A1/fr

Links

Images

Classifications

    • 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

Definitions

  • the disclosed invention relates to a base station and a data transfer method in a mobile communication system.
  • a handover source base station (source base station ( S-eNB)) transmits data not yet transmitted to the user apparatus (UE) and data that has not received an acknowledgment signal (ACK) from the user apparatus (UE) as a handover destination base station (target base station (T -eNB)).
  • source base station S-eNB
  • ACK acknowledgment signal
  • target base station T -eNB
  • T-eNB target base station
  • the target base station (T-eNB) sets the data transfer destination address (ADDR T ) in response to a handover request from the source base station (S-eNB). eNB), and thereafter, the source base station (S-eNB) transfers data to the destination address (ADDR T ).
  • the transfer destination address (ADDR T ) is released and can be used for another data transfer.
  • Conventional handover is disclosed in Non-Patent Document 1-3.
  • 3GPP TS23.401 (5.5.1 Intra-E-UTRAN handover)
  • 3GPP TS36.413 (8.4.2 Handover Resource Allocation)
  • 3GPP TS35.423 (8.2.1 Handover Preparation)
  • the source base station (S-eNB) does not promptly inform the source base station (S-eNB) that the forwarding address (ADDR T ) has been released due to network congestion or communication failure, the source base station (S-eNB ) May still send some data to the forwarding address (ADDR T ).
  • the target base station (T-eNB) releases the transfer destination address (ADDR T ) and then uses the transfer source address (ADDR T ) for data transfer from another source base station (S-eNB ′).
  • the target base station (T-eNB) will receive transfer data not only from another source base station (S-eNB '), but also from the former source base station (S-eNB). All data is transferred to the user equipment (UE). However, transfer data from the former source base station (S-eNB ′) is unnecessary for this user apparatus (UE). Such useless data transfer should not be performed from the viewpoint of effective use of radio resources and reduction of processing load associated with data transmission / reception.
  • the subject of the disclosed invention is that when a hard handover is performed between a source base station (S-eNB) and a target base station (T-eNB), the target base station (T-eNB) is a user equipment (UE) It is at least alleviating the problem of transferring unnecessary data.
  • S-eNB source base station
  • T-eNB target base station
  • UE user equipment
  • a base station is An address management unit that extracts a data transfer source address from a handover request message received from a source base station, issues a transfer destination address corresponding to the transfer source address, and manages a correspondence relationship between the transfer source address and the transfer destination address
  • a network communication unit for notifying the source base station of the transfer destination address by a handover request confirmation message, and receiving transfer data from the source base station at the transfer destination address;
  • a wireless communication unit that transfers transfer data determined to be transferred to the user apparatus.
  • the target base station (T-eNB) is a user equipment (UE). At least the problem of transferring unnecessary data can be reduced.
  • the flowchart which shows the operation example of a base station.
  • FIG. 1 shows an outline of a system used in the embodiment.
  • User equipment User Equipment: UE
  • UE User Equipment
  • eNB evolved NodeB
  • the user apparatus UE
  • LTE Long Term Evolution
  • E-UTRAN Evolved NodeB
  • the system is a Long Term Evolution (LTE) or E-UTRAN mobile communication system, but the disclosed invention is suitable for performing a hard handover such as LTE Advanced. It may be used for a mobile communication system.
  • LTE Long Term Evolution
  • E-UTRAN E-UTRAN
  • a base station that manages a handover source cell is referred to as a source base station (S-eNB), and a base station that manages a handover destination cell is a target base station (T-eNB).
  • S-eNB source base station
  • T-eNB target base station
  • handover between base stations is assumed, but ⁇ 5.
  • the handover may be a handover between switching stations or a handover between an LTE system and a third generation system (3G system).
  • the source base station (S-eNB) When hard handover is performed between the source base station (S-eNB) and the target base station (T-eNB), the source base station (S-eNB) transmits data to be transferred to the user equipment (UE) to the GTP- It transmits to a target base station (T-eNB) via a U path.
  • Data to be transferred to the user apparatus (UE) is data that has not yet been transmitted from the source base station (S-eNB) and data that has been transmitted but has not been acknowledged (ACK).
  • the target base station (T-eNB) transfers the data received from the source base station (S-eNB) to the user apparatus (UE).
  • FIG. 2 shows a functional block diagram of the base stations (S-eNB and T-eNB) shown in FIG.
  • FIG. 2 shows various processing units or functional units included in the base station that are particularly relevant to the embodiment.
  • the base station includes at least a control unit 21, a radio interface 22, a network interface 23, an HO processing unit 24, an address management unit 25, a data storage unit 26, and a condition determination unit 27.
  • the control unit 21 controls the operation of various processing units in the base station.
  • the wireless interface 22 performs processing for transmitting and receiving signals to and from the user equipment (UE).
  • UE user equipment
  • the network interface 23 performs processing for transmitting and receiving signals to and from communication nodes in the network such as other base stations and switching stations (Mobility Management Entity: MME).
  • MME Mobility Management Entity
  • the HO processing unit 24 performs processing related to handover.
  • the base station is the source base station (S-eNB)
  • the HO processing unit 24 is a HO request that is a message for requesting a handover in response to a measurement report message received from the user apparatus (UE). Create a message.
  • the HO processing unit 24 includes the data transfer source address (ADDR S ) in the HO request message.
  • the HO processing unit 24 extracts the transfer destination address (ADDR T ) from the HO request ACK message that is a response to the HO request message.
  • the transfer destination address (ADDR T ) is used as a destination when transferring data to the target base station (T-eNB).
  • the HO processing unit 24 creates an RRC connection reconfiguration message to be notified to the user apparatus (UE).
  • the base station is the target base station (T-eNB)
  • the HO processing unit 24 creates an HO request ACK message that is a response to the HO request message.
  • the HO request ACK message includes the transfer destination address (ADDR T ).
  • the transfer source address (ADDR S ) may be any appropriate address indicating the transfer source when the source base station (S-eNB) transfers data, but is preferably an IP address of the Internet protocol (IP).
  • the transfer destination address (ADDR T ) may be any appropriate address indicating the transfer destination when the target base station (T-eNB) receives data, but is preferably an IP address.
  • the address management unit 25 extracts the data transfer source address (ADDR S ) from the received HO request message, issues the transfer destination address (ADDR T ) corresponding to the transfer source address (ADDR S ), and transfers the transfer source address (ADDR S ).
  • ADDR S ) and transfer destination address (ADDR T ) are managed.
  • the address management unit 25 sends the transfer source address (ADDR S ) and the transfer destination address (ADDR T ) And the transfer destination address (ADDR T ) can be used for other data transfer.
  • the data storage unit 26 stores data to be transferred to the user apparatus (UE).
  • the data transferred to the user equipment (UE) includes not only the transfer data received from the source base station (S-eNB) but also the data received from the switching center (MME).
  • condition determination unit 27 determines whether the data should be transferred to the user apparatus (UE). Specifically, the condition judging unit 27 refers to the correspondence relationship between the transfer source address (ADDR S ) and the transfer destination address (ADDR T ), and the transfer source address (ADDR S ) of the received transfer data is the transfer destination address. Whether data transfer is possible is determined according to whether it is associated with (ADDR T ).
  • FIG. 3 shows a flowchart of a data transfer method performed by the target base station (T-eNB) shown in FIG. 1 when a handover is performed. The flow begins at step 31 and proceeds to step 32.
  • the target base station (T-eNB) receives an HO request message, which is a message for requesting handover, from the source base station (S-eNB).
  • the HO request message includes a transfer source address (ADDR S ) when the source base station (S-eNB) transfers data to the target base station (T-eNB).
  • ADDR S transfer source address
  • step 33 the target base station (T-eNB) pays out a transfer destination address (ADDR T ) as a destination when the source base station (S-eNB) transfers data.
  • the target base station (T-eNB) stores the correspondence relationship between the transfer destination address (ADDR T ) and the transfer source address (ADDR S ).
  • the target base station (T-eNB) transmits an HO request ACK message to the source base station (S-eNB) as a response to the HO request message.
  • the HO request ACK message includes a transfer destination address (ADDR T ).
  • the target base station (T-eNB) receives data to be transferred to the user apparatus (UE) from the source base station (S-eNB).
  • the data to be transferred is data that has not yet been transmitted from the source base station (S-eNB) and data that has been transmitted but whose acknowledgment signal (ACK) has not yet been confirmed.
  • the target base station determines whether or not to transfer the transfer data (data received as data to be transferred) received at the transfer destination address (ADDR T ) to the user equipment (UE). . This determination is based on whether the transfer destination address (ADDR T ) when the transfer data is received and the transfer source address (ADDR S ) of the received transfer data are defined in the correspondence stored in step 33 or not. Based on. If it is defined in the correspondence relationship, data transfer is permitted, but if it is not defined in the correspondence relationship, data transfer is not permitted.
  • step 37 the target base station (T-eNB) transfers the received transfer data to the user apparatus (UE).
  • step 38 the target base station (T-eNB) discards the received transfer data.
  • step 37 and step 38 the flow proceeds to step 39 and ends.
  • FIG. 4 shows an operation example when handover is performed in the system shown in FIG. In the target base station (T-eNB), the operation described in FIG. 3 is performed.
  • T-eNB target base station
  • step 401 the user equipment (UE OLD ) transmits a measurement report message to the source base station (S OLD -eNB) to notify that handover is necessary.
  • the source base station (S OLD -eNB) notifies the target base station (T-eNB) that a handover is necessary by using an HO request message.
  • the HO request message includes a transfer source address (ADDR OLD ) in data transfer.
  • step 405 the target base station (T-eNB) pays out a transfer destination address (ADDR T ) that is a destination when the source base station (S OLD -eNB) transfers data.
  • the target base station (T-eNB) stores the correspondence relationship between the transfer destination address (ADDR T ) and the transfer source address (ADDR OLD ).
  • the target base station (T-eNB) transmits an HO request ACK message to the source base station (S OLD -eNB) as a response to the HO request message.
  • the HO request ACK message includes a transfer destination address (ADDR T ).
  • the source base station sends an RRC connection reconfiguration message to the user equipment (UE) to establish a radio link between the user equipment (UE OLD ) and the target base station (T-eNB).
  • UE user equipment
  • T-eNB target base station
  • the user apparatus UE OLD
  • T-eNB target base station
  • step 411 the user apparatus (UE OLD ) notifies the target base station (T-eNB) of an RRC connection reconfiguration completion message indicating that establishment of the radio link is completed.
  • the target base station (T-eNB) receives transfer data to be transferred to the user apparatus (UE OLD ) from the source base station (S OLD -eNB).
  • the data to be transferred is data that has not yet been transmitted from the source base station (S OLD -eNB) and data that has been transmitted but has not yet been acknowledged (ACK).
  • the target base station determines whether or not the transfer data received at the transfer destination address (ADDR T ) should be transferred to the user apparatus (UE OLD ). This determination is based on whether or not the transfer destination address (ADDR T ) when the transfer data is received and the transfer source address (ADDR OLD ) of the received transfer data are defined in the correspondence stored in step 405. Based on. If it is defined in the correspondence relationship, data transfer is permitted, but if it is not defined in the correspondence relationship, data transfer is not permitted. In the case of the current example, since the correspondence relationship between the transfer destination address (ADDR T ) and the transfer source address (ADDR OLD ) is defined, data transfer is performed.
  • step 417 the target base station (T-eNB) transfers the received transfer data to the user apparatus (UE OLD ).
  • the target base station (T-eNB) determines that the data received from the source base station (S OLD -eNB) has been transferred to the user equipment (UE OLD ), and the transfer destination address (ADDR T ) is released. Specifically, the correspondence relationship between the transfer destination address (ADDR T ) and the transfer source address (ADDR OLD ) is deleted.
  • the target base station (T-eNB) notifies the source base station (S OLD -eNB) of a message indicating that the transfer destination address (ADDR T ) has been released. Thereafter, the target base station (T-eNB) can use the transfer destination address (ADDR T ) for another data transfer.
  • another user apparatus needs a handover, and a procedure similar to the procedure from Step 401 to Step 417 is performed using another user apparatus (UE NEW ) and another source base station ( S NEW -eNB).
  • UE NEW another user apparatus
  • S NEW -eNB another source base station
  • the user equipment and the source base station are “different”, for the sake of simplicity of explanation, “another user equipment (UE NEW )” and “another source base station (S NEW -eNB ) "Is used.
  • step 421 another user apparatus (UE NEW ) transmits a measurement report message to another source base station (S NEW -eNB) to notify that handover is necessary.
  • S NEW -eNB another source base station
  • step 423 another source base station (S NEW -eNB) notifies the target base station (T-eNB) that the handover is necessary by an HO request message.
  • the HO request message includes a transfer source address (ADDR NEW ) in data transfer.
  • the target base station (T-eNB) can pay out ADDR T as a transfer destination address that is a destination when another source base station (S NEW -eNB) transfers data. This is because the correspondence relationship between the transfer destination address (ADDR T ) and the transfer source address (ADDR OLD ) with respect to the former source base station (S OLD -eNB) has been deleted.
  • the target base station (T-eNB) stores the correspondence relationship between the transfer destination address (ADDR T ) and the transfer source address (ADDR NEW ).
  • the target base station transmits an HO request ACK message to another source base station (S NEW -eNB) as a response to the HO request message.
  • the HO request ACK message includes a transfer destination address (ADDR T ).
  • step 429 another source base station (S NEW -eNB) sends an RRC connection reconfiguration message to establish a radio link between another user equipment (UE NEW ) and the target base station (T-eNB). Notify another user equipment (UE NEW ).
  • another user apparatus (UE NEW ) establishes a radio link with the target base station (T-eNB) in response to this.
  • step 431 another user apparatus (UE NEW ) notifies the target base station (T-eNB) of an RRC connection reconfiguration completion message indicating that establishment of the radio link is completed.
  • the target base station (T-eNB) receives transfer data to be transferred to another user apparatus (UE NEW ) from another source base station (S NEW -eNB).
  • the target base station determines whether or not the transfer data received at the transfer destination address (ADDR T ) should be transferred to another user apparatus (UE NEW ). This determination is based on whether or not the transfer destination address (ADDR T ) when the transfer data is received and the transfer source address (ADDR NEW ) of the received transfer data are defined in the correspondence stored in step 425. Based on. If it is defined in the correspondence relationship, data transfer is permitted, but if it is not defined in the correspondence relationship, data transfer is not permitted. In the case of the present example, since the correspondence between the transfer destination address (ADDR T ) and the transfer source address (ADDR NEW ) is defined, data transfer is permitted.
  • step 437 the target base station (T-eNB) transfers the received transfer data to another user apparatus (UE NEW ).
  • UE NEW another user apparatus
  • step 441 some data is transferred from the source address (ADDR OLD ) of the former source base station (S OLD -eNB) to the destination address (ADDR T ) of the target base station (T-eNB). May be transferred to. This data is to be transferred to the former user apparatus (UE OLD ) and is not data to be transferred to the current user apparatus (UE NEW ).
  • the transfer source of data received at the transfer destination address (ADDR T ) could not be identified. In this case, all data received at the transfer destination address (ADDR T ) is transferred to the current user equipment (UE NEW ). Will be. However, in the embodiment, in Step 443, the target base station (T-eNB) transfers the transfer data received at the transfer destination address (ADDR T ) from the transfer source address (ADDR OLD ) to another user apparatus (UE NEW ). Determine whether or not to transfer. In the case of the current example, the correspondence between the transfer destination address (ADDR T ) and the transfer source address (ADDR NEW ) is specified, but the correspondence between the transfer destination address (ADDR T ) and the transfer source address (ADDR OLD ) The relationship is not specified. Therefore, the data from the former transfer source address (ADDR OLD ) is not transferred to another user apparatus (UE NEW ), and the received transfer data is discarded in step 445.
  • the disclosed invention is not limited to handover between base stations, but can also be applied to handover between switching centers (MME), or applicable to handover between LTE systems and 3G systems.
  • MME switching centers
  • Fig. 5 shows the outline of the system used in the modified example.
  • the user apparatus performs handover from the migration source cell managed by the source base station (S-eNB) to the migration destination cell managed by the target base station (T-eNB).
  • the switching station Mobility Management Entity: MME
  • the source base station (S-eNB) is connected to the source switching center (S-MME) through the S1 interface.
  • the target base station (T-eNB) is also connected to the target exchange (T-MME) through the S1 interface.
  • the source base station (S-eNB) and target base station (T-eNB) cannot directly transmit and receive signals, but the source switching center (S-MME) and target switching station (T-MME) Can send and receive directly.
  • FIG. 6 shows an operation example when handover is performed in the modification shown in FIG.
  • a procedure similar to the procedure described in FIG. 4 is executed, but communication between the source base station (S-eNB) and the target base station (T-eNB) It is different in that it is done through.
  • S-eNB source base station
  • T-eNB target base station
  • step 601 the user equipment (UE) transmits a measurement report message to the source base station (S-eNB) to notify that handover is necessary.
  • S-eNB source base station
  • the source base station (S-eNB) notifies the switching base station (S-MNB) on the source base station (S-eNB) side using the HO required message that the handover is necessary.
  • the target base station (T-MME) After transferring the message from the source base station (S-eNB) side switching station (S-MME) to the target base station (T-eNB) side switching station (T-MME), the target base station (T-MNB)
  • the switching center (T-MME) on the eNB) side notifies the target base station (T-eNB) by an HO request message.
  • the HO required message and the HO request message include a transfer source address (ADDR S ) in data transfer.
  • ADDR S transfer source address
  • step 605 the target base station (T-eNB) pays out a transfer destination address (ADDR T ) that is a destination when the source base station (S-eNB) transfers data.
  • the target base station (T-eNB) stores the correspondence relationship between the transfer destination address (ADDR T ) and the transfer source address (ADDR S ).
  • the target base station (T-eNB) transmits a HO request ACK message to the target base station (T-eNB) side switching station (T-MME) as a response to the HO request message, and the target base station (
  • the exchange (T-MME) on the T-eNB side transfers the message to the exchange (S-MME) on the source base station (S-eNB) side, and then exchanges on the source base station (S-eNB) side.
  • the station (S-MME) transmits a handover command (HO command) to the source base station (S-eNB).
  • the HO request ACK message and the HO command include a transfer destination address (ADDR T ).
  • step 609 the source base station (S-eNB) sends an RRC connection reconfiguration message to the user equipment (UE) in order to establish a radio link between the user equipment (UE) and the target base station (T-eNB). Notice. Although not shown, in response to this, the user apparatus (UE) establishes a radio link with the target base station (T-eNB).
  • step 611 the user apparatus (UE) notifies the target base station (T-eNB) of an RRC connection reconfiguration completion message indicating that the establishment of the radio link is completed.
  • the target base station receives data to be transferred to the user apparatus (UE) from the source base station (S-eNB).
  • the target base station determines whether or not the transfer data received at the transfer destination address (ADDR T ) should be transferred to the user apparatus (UE). This determination is based on whether the transfer destination address (ADDR T ) when the transfer data is received and the transfer source address (ADDR S ) of the received transfer data are defined in the correspondence stored in step 605 or not. Based on. If it is defined in the correspondence, data transfer is permitted (step 617). If it is not defined in the correspondence, data transfer is not permitted and discarded (step 619).
  • the disclosed invention is not limited to such an embodiment, and those skilled in the art understand various modifications, modifications, alternatives, replacements, and the like. Will do.
  • the disclosed invention may be used in any suitable mobile communication system that performs hard handover.
  • specific numerical examples have been described in order to facilitate understanding of the invention, these numerical values are merely examples and any appropriate values may be used unless otherwise specified.
  • the classification of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, or the items described in one item may be used in different items. It may apply to the matters described in (as long as there is no conflict).
  • the boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to physical component boundaries.
  • the operations of a plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components.
  • the base station has been described using a functional block diagram, but such a device may be implemented in hardware, software, or a combination thereof.
  • Software operating in accordance with the present invention includes random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server and other suitable It may be stored in any storage medium.

Abstract

Une station de base comprend : une unité de gestion d'adresses qui extrait une adresse source de transfert de données dans un message de demande reçu d'une station de base source, délivre une adresse de destination de transfert correspondant à ladite adresse source de transfert, et gère la relation de correspondance entre l'adresse source de transfert et l'adresse de destination de transfert ; une unité de communications de réseau qui notifie à la station de base source l'adresse de destination de transfert à l'aide d'un message de confirmation de demande de transfert intercellulaire et reçoit des données de transfert de la station de base source à l'adresse de destination de transfert ; une unité de détermination de conditions qui examine la relation de correspondance et détermine de transférer ou non les données de transfert reçues à un dispositif d'utilisateur selon que l'adresse source de transfert pour les données de transfert reçues correspond ou non à l'adresse de destination de transfert ; et une unité de communications sans fil qui transfère au dispositif d'utilisateur des données de transfert pour lesquelles une détermination de transfert a été faite.
PCT/JP2013/071175 2012-08-08 2013-08-05 Station de base dans un système de communications mobiles et procédé de transfert de données WO2014024851A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-175894 2012-08-08
JP2012175894A JP5977616B2 (ja) 2012-08-08 2012-08-08 移動通信システムにおける基地局及びデータ転送方法

Publications (1)

Publication Number Publication Date
WO2014024851A1 true WO2014024851A1 (fr) 2014-02-13

Family

ID=50068075

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/071175 WO2014024851A1 (fr) 2012-08-08 2013-08-05 Station de base dans un système de communications mobiles et procédé de transfert de données

Country Status (2)

Country Link
JP (1) JP5977616B2 (fr)
WO (1) WO2014024851A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005012718A (ja) * 2003-06-23 2005-01-13 Hitachi Ltd 移動体ｉｐデータ通信システム
JP2012138945A (ja) * 2012-03-09 2012-07-19 Fujitsu Ltd 移動局
JP2012142983A (ja) * 2006-09-06 2012-07-26 Sharp Corp ネットワークベースｉｐモビリティプロトコルを利用した中継装置、移動端末及び中継装置の通信方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101287723B1 (ko) * 2009-03-18 2013-07-19 후지쯔 가부시끼가이샤 기지국, 통신 장치, 중계 방법 및 통신 방법
JP5073718B2 (ja) * 2009-08-18 2012-11-14 株式会社エヌ・ティ・ティ・ドコモ 移動通信方法及び無線基地局
JP5111465B2 (ja) * 2009-08-18 2013-01-09 株式会社エヌ・ティ・ティ・ドコモ 移動通信方法及び無線基地局

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005012718A (ja) * 2003-06-23 2005-01-13 Hitachi Ltd 移動体ｉｐデータ通信システム
JP2012142983A (ja) * 2006-09-06 2012-07-26 Sharp Corp ネットワークベースｉｐモビリティプロトコルを利用した中継装置、移動端末及び中継装置の通信方法
JP2012138945A (ja) * 2012-03-09 2012-07-19 Fujitsu Ltd 移動局

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
3GPP, 3GPP TS 36.423 V11.1.0, 30 June 2012 (2012-06-30), pages 13 - 17 *

Also Published As

Publication number Publication date
JP2014036299A (ja) 2014-02-24
JP5977616B2 (ja) 2016-08-24

Similar Documents

Publication Publication Date Title
JP6946321B2 (ja) シームレスのハンドオーバーをサポートする方法及びｅｎｂ装置
JP6630003B2 (ja) ハンドオーバー失敗防止方法
RU2628316C2 (ru) Способы для обеспечения plmn-идентификатора шлюза сети пакетной передачи данных для узла ran
JP6399118B2 (ja) モバイル通信システム、基地局、及びそれらの方法
US20170019945A1 (en) Dual Connectivity Re-Establishment
JP5655958B2 (ja) ハンドオーバ方法およびモビリティ管理ネットワーク要素
US20110188468A1 (en) Returning user equipment to a source radio access network
EP2911451B1 (fr) Procédé et dispositif de transfert intercellulaire direct
KR20110124164A (ko) 단말 이동성을 지원하기 위한 핸드오버 방법
CN111866851B (zh) 无线通信系统中基于局部区域管理分组数据连接的方法和装置
JP2009539279A (ja) 無線通信システムにおけるハンドオーバー手順
CN102238658A (zh) 一种支持网关节点重选的方法
JP2019521588A (ja) 通信制御方法および関連するネットワーク要素
US9479970B2 (en) Bearer switching method, home NodeB gateway, and home NodeB
CN106605429B (zh) 用于管理电路交换回退呼叫的系统和方法
WO2021027932A1 (fr) Procédé et appareil de traitement d'informations, dispositif et support de stockage lisible par ordinateur
JP6198940B2 (ja) デフォルト・ベアラなしのハンドオーバのための方法および装置
US10841848B2 (en) Communication method, user equipment, base station, control plane network element, and communications system
EP3718333A1 (fr) Procédé et appareil de mise à jour de relations de stations de base voisines
US20140120917A1 (en) Communication system, communication method, base station , and management device
JP6324965B2 (ja) ソースアクセスシステムに対するフェイリュアイベントの表示をサポートするための方法
JP2020511844A (ja) 通信方法、セカンダリネットワークノード及び端末
CN102480796A (zh) 一种实现无线资源控制协议连接重建的方法和系统
US11523309B2 (en) Method and device for supporting handover
KR20150014769A (ko) Lte 시스템에서 rrc 연결을 재설정하기 위한 방법 및 그 전자 장치

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: 13828090

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13828090

Country of ref document: EP

Kind code of ref document: A1