WO2011078363A1 - 移動通信方法及び交換局 - Google Patents
移動通信方法及び交換局 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/12—Reselecting a serving backbone network switching or routing node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/22—Manipulation of transport tunnels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
- H04W80/045—Network layer protocols, e.g. mobile IP [Internet Protocol] involving different protocol versions, e.g. MIPv4 and MIPv6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/14—Backbone network devices
Definitions
- the present invention relates to a mobile communication method for exchanging bearer information from an old SGSN under the control of a new SGSN (Serving GPRS Support Node) under the control of a terminal after movement, and exchange for packet access control. About the station.
- a new SGSN Serving GPRS Support Node
- Non-Patent Document 1 In the current 3GPP specifications, in the location registration process across SGSN when the terminal is idle, a process of taking over the bearer in the preserved state from the old SGSN to the new SGSN is defined (Non-Patent Document 1). There are PDP contexts for GPRS users and EPS contexts for EPS users as bearer types, and the current 3GPP specifications are that only GTPv1 (GTP protocol, version 1) and GTPv2 (GTP protocol, version 2) signals are inherited. (Non-Patent Documents 2 and 3).
- FIG. 8A and 8B show a procedure for taking over bearer information from the old SGSN to the new SGSN, and FIG. 8A shows a logical communication path using a GTPv1 signal as a second protocol signal.
- FIG. 7B shows the case that the bearer information (EPS context) is taken over using the GTPv2 signal that is the first protocol signal.
- the new SGSN is established on the old side with respect to the old SGSN.
- the existing GPRS bearer information is taken over.
- the new SGSN requests bearer information from the old SGSN using the GTPv1 signal.
- the old SGSN returns the GPRS bearer information of the GPRS bearer currently established when receiving the GTPv1 signal from the new SGSN as a response signal.
- the new SGSN takes over the bearer information based on the bearer information set in the response signal from the old SGSN, and establishes a GPRS bearer between the new SGSN and the GGSN based on the bearer information (PDP context).
- PDP context bearer information
- the new SGSN when the old SGSN takes over the EPS bearer established with the S-GW, the new SGSN requests bearer information from the old SGSN using the GTPv2 signal.
- the old SGSN returns the bearer information (EPS context) of the EPS all currently established when receiving the GTPv2 signal from the new SGSN as a response signal.
- the new SGSN establishes a new EPS bearer between the new SGSN and the S-GW based on the bearer information set in the response signal.
- SGSN that connects a UTRAN (W-CDMA / HSPA) compatible terminal to an EPC network supports both GTPv1 and GTPv2 signals. Therefore, when the bearer information is taken over from the old SGSN, the bearer information is requested using either a predetermined GTPv1 signal or GTPv2 signal.
- 3GPP TS23.060 (version 8.7.0) 3GPP TS29.060 (version 8.10.0) 3GPP TS29.274 (version 8.4.0)
- the present invention has been made in view of such a point, and a mobile communication method and an exchange station in which a bearer takeover process is surely performed between an old SGSN and a new SGSN without causing a situation such as service interruption.
- the purpose is to provide.
- the second switching center receives a location update message from a terminal that has moved from the management area of the first switching center to the management area of the second switching center;
- the second switching center that has received the message transmits a first protocol signal for taking over the communication path information to the first switching center, and as the bearer for the terminal, If a bearer is established between the first switching center and the GGSN connected to the external switching network and the external IP network, the second protocol is transmitted to the second switching center using the first protocol signal.
- a step of notifying an error for causing the protocol to fall back, and the second switching center that has received the error notification from the first switching center with a first protocol signal sets the protocol type to the second protocol.
- Change characterized by comprising the steps of: transmitting a protocol signal to take over the communication channel information to the first switching center again at the changed protocol type, the.
- the second switching center can be smoothly urged to fall back.
- a bearer takeover process is reliably performed between the old SGSN and the new SGSN, and a situation such as service interruption can be prevented in advance.
- FIG. Conceptual diagram of parameter configuration of GTPv2 signal used in Embodiment 1
- Sequence diagram corresponding to bearer takeover shown in FIG. The figure which shows the procedure which performs bearer taking over in Embodiment 2.
- Sequence diagram in which a part of the bearer takeover procedure of the second embodiment is modified
- FIG. 1 is a diagram illustrating a configuration of a mobile communication network, and a core network unit mainly illustrates a packet core unit.
- the mobile communication network includes a radio access network 2 that communicates with the mobile terminal 1 via radio waves, and a core network 3 that performs connection processing and user data transfer.
- the radio access network 2 is configured by UTRAN (UMTS radio access network) or GERAN (GSM / EDGE radio access network) capable of radio communication with the mobile terminal 1.
- UTRAN UMTS radio access network
- GSM GSM / EDGE radio access network
- the radio access network 2 includes a radio base station 11 installed for each cell and a base station controller 12 that controls the plurality of radio base stations 11.
- the radio base station 11 is called a Node B in UMTS, but may be called a BTS (Base Transceiver Station).
- the base station control device 12 controls a plurality of radio base stations 11, and controls assignment and switching of radio channels to the terminal 1.
- the base station control device 12 is also referred to as a radio control device (RNC: Radio Network Controller) or BSC (Base Station Controller).
- RNC Radio Network Controller
- BSC Base Station Controller
- the core network 3 includes functional elements such as SGSN 13A to 13C, GGSN 14, S-GW 15, P-GW 16, and HSS 17.
- SGSNs 13A to 13C grasp the position of the terminal 1 accessing the packet switching domain and control the transfer of user traffic between the GGSN 14 and the radio access network 2.
- IP packets are routed and transferred by a packet transfer protocol, and mobility management and session management (bearer control) necessary for mobile communication are performed.
- the SGSNs 13A and 13B have an S3 / S4 interface (GTP protocol, version 2).
- the SGSN provided with the S3 / S4 interface is a functional element whose function has been expanded in order to realize interoperability between UMTS and EPS.
- the S4 interface provided in the SGSN 13A, 13B plays a role of session management (EPS bearer control) with the S-GW 15 using the GTPv2 signal and transfer of user packets.
- EPS bearer control session management
- the SGSNs 13A and 13B that support the GTP protocol, version 2 are denoted as S4-SGSN.
- the SGSNs 13A and 13B also include a Gn / Gp interface (GTP protocol, version 1).
- the SGSNs 13A and 13B can establish a GPRS bearer by connecting to the GGSN 14 of the UMTS / GPRS packet core using a GTPv1 signal.
- the SGSN 13C is a functional element that does not include the S3 / S4 interface but includes only the Gn / Gp interface (GTP protocol, version 1).
- GTP protocol version 1
- the SGSN 13C that supports only the GTP protocol, version 1 is denoted as Gn / Gp-SGSN.
- the GGSN 14 is a functional element that controls connection between the UMTS / GPRS packet core and the external IP network in response to a connection request from the terminal 1.
- the GGSN 14 constitutes a UMTS / GPRS packet core together with the SGSN 13C.
- the S-GW 15 connects the U plane between the radio access network 2 and the EPC and provides a user packet routing / transfer function.
- the terminal 1 transfers the IP packet via the EPS bearer established between the SGSN 13A and 13B and the S-GW 15.
- the P-GW 16 serves as a connection point with the external IP network, and transfers user packets to and from the external IP network.
- the EPC network includes functional elements such as S4-SGSN 13A, 13B, S-GW 15, P-GW 16, and MME (Mobility Management Entity) (not shown).
- the HSS 17 is a subscriber server that manages subscriber information. The subscriber information registered in the HSS 17 can be searched by the user ID and includes bearer information.
- FIG. 2 is a conceptual diagram of a parameter configuration of the GTPv2 signal used in the present embodiment. As shown in the figure, it includes a user ID 20, a protocol type 21, a signal name 22, an existing parameter 23, and an additional parameter 24.
- the user ID 20 is information for identifying the user of the terminal 1 that has notified the location update message.
- the protocol type 21 is set to “GTPv1” or “GTPv2”. In the signal name 22, “Context Request” is set when requesting bearer information, and “Context Response” is set when returning bearer information.
- the existing parameter 23 is configured such that EPS bearer information 23a can be set as a GTPv2 parameter.
- the additional parameter 24 is configured to set GPRS bearer information (PDP Context) handled by GTPv1 which is a protocol other than GTPv2.
- PDP Context GPRS bearer information
- the additional parameter 24 is not added to the “Context Request”.
- GPRS bearer information (PDP Context) handled by GTPv1 having a different protocol version is provided as an additional parameter 24 in the GTPv2 parameter configuration. This makes it possible to set bearer information (GPRS bearer information) with different protocol versions for the GTPv2 signal.
- FIG. 3 shows a procedure in which the new SGSN takes over bearers from the old SGSN
- FIG. 4 is a sequence corresponding to the bearer take-up shown in FIG.
- the new SGSN in FIG. 3 is assumed to be one S4-SGSN 13A shown in FIG. 1, and the old SGSN is assumed to be the other S4-SGSN 13B shown in FIG. That is, the old SGSN (13B) and the new SGSN (13A) are both SGSNs that support both GTPv1 and GTPv2.
- the old SGSN (13B) which is already the first switching center, communicates with the GGSN 14 as a bearer for transferring the user data of the terminal 1 accessing the packet switching domain on the core network.
- the GGSN 14 Has established a GPRS bearer. Since the terminal 1 is in the idle state and no user data is generated, it is assumed that the wireless resource is released while maintaining the GPRS bearer (S1).
- the terminal 1 moves from the management area of the old SGSN (13B) to the management area of the new SGSN (13A) as the second switching center (S2), the terminal 1 moves A location update message is notified to the new SGSN (13A) via the previous wireless access network 2 (S3).
- the new SGSN (13A) receives the location update message from the terminal 1, the new SGSN (13A) transmits a bearer information request to the old SGSN (13B) using a GTPv2 signal (S11).
- the new SGSN (13A) uniformly uses the GTPv2 signal as a protocol for making a bearer information request.
- the GPRS bearer When the old SGSN (13B) receives the bearer information request (GTPv2), the GPRS bearer has been established. That is, the bearer information held in the old SGSN (13B) is a GPRS bearer based on GTPv1, whereas the bearer information request protocol is GTPv2 and is not compatible. If the specifications of Non-Patent Document 2 described above are used, an error is returned because GPRS bearer information of another protocol cannot be set in the EPS bearer information 23a of the GTPv2 signal. In the present embodiment, an additional parameter 24 that can set GPRS bearer information of another protocol is provided in the parameter configuration of the GTPv2 signal (FIG. 2), and no error is returned at this point.
- the old SGSN (13B) when the old SGSN (13B) receives a bearer information request from the new SGSN (13A) using the GTPv2 signal, it determines the protocol type from the protocol type 21 of the GTPv2 signal (S12). If the protocol type is GTPv2, the old SGSN (13B) supports GTPv2 based on the above-mentioned preconditions, and therefore it is determined that the processing is continued (S13).
- the old SGSN (13B) determined to continue processing identifies the terminal user from the user ID 20 of the GTPv2 signal, and is currently established for the terminal user from the subscriber information stored in the database of the SGSN (13B).
- the bearer information is obtained by searching the existing bearer information (S14), and the bearer information type is determined (S15). That is, it is determined whether the bearer currently established for the terminal 1 of the user is a GPRS bearer or an EPS bearer. Based on the above assumption, it can be determined that it is a GPRS bearer. If the searched currently established bearer information is GPRS bearer information of another protocol, the GPRS bearer information is set in the additional parameter 24 in the parameter configuration of the GTPv2 signal without returning an error. In this way, a GTPv2 signal in which GPRS bearer information is set in the additional parameter 24 is transmitted as a response to the new SGSN (13A) (S16).
- the new SGSN (13A) extracts bearer information from the GTPv2 signal notified from the old SGSN (13B).
- the PDP Context is set in the additional parameter 24 of the GTPv2 signal as shown in FIG. 2, a GPRS bearer for the terminal 1 is established with the GGSN 14 by GTPv1 according to the PDP Context (S17). ). Then, OK is returned to the terminal 1.
- the present embodiment is configured so that the GPRS bearer parameter of another protocol can be added to the GTPv2 signal, and the old SGSN that has received the bearer information takeover request with the GTPv2 signal is established when the GTP signal is received.
- the bearer information held in the additional parameter 24 of the GTPv2 signal is set.
- the old SGSN receives a GTPv2 signal for which a bearer takeover request is made by GTPv2
- the currently established bearer information type held in the old SGSN for the terminal user is determined, and the bearer takeover request is made by the GTPv2 signal If the bearer type is GPRS in spite of being received, “Fallback to GTPv1” specifying the protocol as a GTPv2 error is returned.
- FIG. 5 shows a procedure in which the new SGSN takes over the bearer from the old SGSN
- FIG. 6A shows a sequence corresponding to the bearer take-up shown in FIG.
- the new SGSN in FIG. 5 is assumed to be one S4-SGSN 13A shown in FIG. 1, and the old SGSN is assumed to be the other S4-SGSN 13B shown in FIG. That is, both the old SGSN (13B) and the new SGSN (13A) support both GTPv1 and GTPv2.
- the new SGSN (13A) When the new SGSN (13A) receives a location update message from the terminal 1 through the same process as in the above embodiment, it transmits a bearer information request to the old SGSN (13B) using a GTPv2 signal (S11).
- the new SGSN (13A) uses a GTPv2 signal uniformly as a protocol for making a bearer information request.
- the new SGSN (13A) that has received the location update message from the terminal 1 transmits a bearer information request (S11), and the old SGSN (13B) determines the bearer information type.
- the processes up to (S15) are the same as those in the first embodiment. The procedure after S15 will be mainly described.
- the old SGSN (13B) acquires bearer information (S14), determines the bearer information type (S15), and can determine that it is a GPRS bearer from the above assumption.
- the old SGSN (13B) transmits a GTPv2 error “Fallback to GTPv1” clearly indicating that the fallback to GTPv1 is made to the new SGSN (13A) (S21).
- the new SGSN (13A) When the new SGSN (13A) receives a GTPv2 error from the old SGSN (13B), the new SGSN (13A) performs GTPv2 error determination and determines the error content (S22). Since “Fallback to GTPv1” is the error content, the protocol falls back from GTPv2 to GTPv1, and a bearer information request is transmitted to the old SGSN (13B) using the GTPv1 signal (S23).
- the old SGSN (13B) can set the GPRS bearer information (PDP Context) currently established in the GTPv1 signal and respond to the new SGSN (13A) (S24).
- PDP Context GPRS bearer information
- Fig. 6 (B) shows the fallback function sequence specified in Non-Patent Document 3 (3GPP TS29.274 (version 8.4.0), chapter 7.10) as a comparative example.
- the process is the same until the old SGSN receives the bearer information request and determines the protocol.
- the old SGSN does not support GTPv2, so it is determined that the error is transmitted at that time.
- An error is returned in the GTPv1 signal supported by the old SGSN. For this reason, it is difficult to respond flexibly as shown in the second embodiment.
- the second embodiment determines up to the bearer information type currently established by the old SGSN that has received the bearer information request, and returns a GTPv2 error so that appropriate fallback is performed.
- the received new SGSN can be switched to a protocol that can reliably receive bearer information, and the bearer takeover process is reliably performed between the old SGSN and the new SGSN, thereby preventing a situation such as service interruption.
- the old SGSN determines the bearer information type and sets the protocol type of the fallback destination for the GTPv2 error.
- how to determine the error content of the GTPv2 error can be changed as appropriate. It is.
- the process up to bearer information type determination (S11 to S15) is the same as the sequence shown in FIG. 6A, but a GTPv2 error that does not specify an error content is returned to the new SGSN. (S31).
- the new SGSN falls back the protocol used for the bearer information request to the GTPv1 signal which is another protocol (S32), and reissues the bearer information request using the GTPv1 signal (S33).
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Abstract
Description
(実施の形態1)
図1は移動通信ネットワークの構成を示す図であり、コアネットワーク部は主にパケットコア部を図示している。移動通信ネットワークは、移動端末1と無線波を介して通信する無線アクセスネットワーク2と、接続処理やユーザデータの転送を行うコアネットワーク3とを含んで構成されている。
図3は新SGSNが旧SGSNからベアラ引き継ぎを行う手順を示しており、図4は図3に示すベアラ引き継ぎに対応したシーケンスである。図3における新SGSNは図1に示す一方のS4-SGSN13Aであり、旧SGSNは図1に示すもう一方のS4-SGSN13Bであるものとして説明する。すなわち、旧SGSN(13B)と新SGSN(13A)は、いずれもGTPv1にもGTPv2にも対応しているSGSNである。
本実施の形態は、図1に示された移動通信ネットワークと同一構成の移動通信ネットワークを前提として説明する。図2に示すGTPv2信号のパラメータ構成中の追加パラメータ24は必須ではない。
図5は新SGSNが旧SGSNからベアラ引き継ぎを行う手順を示しており、図6(A)は図5に示すベアラ引き継ぎに対応したシーケンスである。図5における新SGSNは図1に示す一方のS4-SGSN13Aであり、旧SGSNは図1に示すもう一方のS4-SGSN13Bであるものとして説明する。すなわち、旧SGSN(13B)と新SGSN(13A)は、いずれもGTPv1にもGTPv2にも対応している。
Claims (5)
- 第1の交換局の管理エリアから第2の交換局の管理エリアへ移動した端末から、前記第2の交換局が位置更新メッセージを受信する工程と、
前記位置更新メッセージを受信した前記第2の交換局が、通信路情報を引継ぐための第1のプロトコル信号を、前記第1の交換局に対して送信する工程と、
前記端末用のベアラとして、前記第1の交換局及び外部IPネットワークに接続されるGGSNと前記第1の交換局との間にベアラが確立されている場合、前記第2の交換局に対して前記第1のプロトコル信号で第2のプロトコルにフォールバックさせるためのエラーを通知する工程と、
前記第1の交換局から第1のプロトコル信号でエラー通知を受けた前記第2の交換局が、プロトコル種別を前記第2のプロトコルに変更して、再び変更後のプロトコル種別にて第1の交換局に対して通信路情報を引き継ぐためのプロトコル信号を送信する工程と、
を具備したことを特徴とする移動通信方法。 - 前記第1の交換局は、前記エラーを通知する工程において、前記GGSNと前記第1の交換局との間に前記ベアラが確立されている場合、前記第2のプロトコルへのフォールバックを促すことをエラー内容とした第1のプロトコル信号を前記第2の交換局に対して送信することを特徴とする請求項1記載の移動通信方法。
- 前記第1の交換局は、前記エラーを通知する工程において、前記GGSNと前記第1の交換局との間に前記ベアラが確立されている場合、前記第2のプロトコルへのフォールバックを促すことをエラー内容とした第1のプロトコル信号を前記第2の交換局に対して送信し、
前記第2の交換局は、前記第1の交換局から前記第2のプロトコルへのフォールバックを促すことをエラー内容とした第1のプロトコル信号を受信した場合、前記第2のプロトコルに対応した通信路情報を引継ぐための第2のプロトコル信号を、前記第1の交換局に対して送信する、ことを特徴とする請求項1に記載の移動通信方法。 - 端末が自局の管理エリアから他の交換局の管理エリアへ移動した際に、前記他の交換局に対して当該端末に関する通信路情報の引継ぎを行う交換局であって、
前記他の交換局から、通信路情報を引継ぐための第1のプロトコル信号を受信する手段と、
前記端末用のベアラとして、前記第1の交換局及び外部IPネットワークに接続されるGGSNと前記第1の交換局との間にベアラが確立されている場合、第2のプロトコルへのフォールバックを促すことをエラー内容とした第1のプロトコル信号を前記第2の交換局に対して送信する手段と、
を具備したことを特徴とする交換局。 - 端末が他の交換局の管理エリアから自局の管理エリアへ移動して来ると、前記他の交換局から当該端末に関する通信路情報の引継ぎを行う交換局であって、
通信路情報を引継ぐための第1のプロトコル信号を前記他の交換局に対して送信する手段と、
前記他の交換局から第1のプロトコル信号で第2のプロトコルにフォールバックさせるためのエラーが通知されると、前記第2のプロトコルに対応した通信路情報を引継ぐための第2のプロトコル信号を前記他の交換局に対して送信する手段と、
前記他の交換局から受信した第1又は第2のプロトコル信号に、第1又は第2のプロトコルによる通信路情報がそれぞれ設定されていれば、該当プロトコルによる通信路情報を元に前記端末の通信路を引き継ぐ手段と、
を具備したことを特徴とする交換局。
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SG2012047262A SG181943A1 (en) | 2009-12-24 | 2010-12-24 | Mobile communication method and exchange station |
KR1020127016003A KR101233815B1 (ko) | 2009-12-24 | 2010-12-24 | 이동통신방법 및 교환국 |
CN2010800589533A CN102668634B (zh) | 2009-12-24 | 2010-12-24 | 移动通信方法和交换台 |
PL10839591T PL2519051T3 (pl) | 2009-12-24 | 2010-12-24 | Sposób komunikacji mobilnej i stacja wymiany |
BR112012017770A BR112012017770A2 (pt) | 2009-12-24 | 2010-12-24 | método de comunicação móvel e central telefônica. |
US13/518,071 US8867489B2 (en) | 2009-12-24 | 2010-12-24 | Mobile communication method and exchange |
AU2010336217A AU2010336217B2 (en) | 2009-12-24 | 2010-12-24 | Mobile Communication Method, First Node and Second Node |
EP10839591.4A EP2519051B1 (en) | 2009-12-24 | 2010-12-24 | Mobile communication method and exchange station |
RU2012129367/07A RU2524176C2 (ru) | 2009-12-24 | 2010-12-24 | Способ мобильной связи и коммутационный узел |
MX2012007398A MX2012007398A (es) | 2009-12-24 | 2010-12-24 | Metodo de comunicacion movil y estacion de intercambio. |
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JP2009293016A JP4740368B2 (ja) | 2009-12-24 | 2009-12-24 | 移動通信方法及び交換局 |
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US (1) | US8867489B2 (ja) |
EP (1) | EP2519051B1 (ja) |
JP (1) | JP4740368B2 (ja) |
KR (1) | KR101233815B1 (ja) |
CN (1) | CN102668634B (ja) |
AU (1) | AU2010336217B2 (ja) |
BR (1) | BR112012017770A2 (ja) |
MX (1) | MX2012007398A (ja) |
PL (1) | PL2519051T3 (ja) |
RU (1) | RU2524176C2 (ja) |
SG (1) | SG181943A1 (ja) |
WO (1) | WO2011078363A1 (ja) |
Citations (3)
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JP2005506002A (ja) * | 2001-10-05 | 2005-02-24 | ノキア コーポレイション | ネットワークノード間におけるアドレスの変更とメッセージの関連付け |
JP2005223909A (ja) * | 2004-02-02 | 2005-08-18 | Lucent Technol Inc | 無線通信システムにおいてプロトコル・サポートを検出する方法 |
JP2009293016A (ja) | 2008-05-02 | 2009-12-17 | Canon Inc | インクジェット用インク、インクジェット記録方法、インクカートリッジ、記録ユニット、及びインクジェット記録装置 |
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FI972725A (fi) * | 1997-06-24 | 1998-12-25 | Nokia Telecommunications Oy | Uudelleenreititys |
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US7490152B2 (en) * | 2003-04-11 | 2009-02-10 | Alcatel-Lucent Usa Inc. | Version caching mechanism |
ES2331141T3 (es) * | 2005-09-27 | 2009-12-22 | Telefonaktiebolaget Lm Ericsson (Publ) | Una arquitectura de red y un metodo relacionado con el acceso de estaciones de usuario. |
US9049629B2 (en) * | 2007-06-18 | 2015-06-02 | Qualcomm Incorporated | Method and apparatus for fast inter-system handover |
US20090016334A1 (en) * | 2007-07-09 | 2009-01-15 | Nokia Corporation | Secured transmission with low overhead |
CN101557646B (zh) * | 2008-04-10 | 2011-05-04 | 华为技术有限公司 | 创建承载方法、服务网关和移动性管理实体 |
JP5277154B2 (ja) * | 2009-12-24 | 2013-08-28 | 株式会社エヌ・ティ・ティ・ドコモ | 移動通信方法及び交換局 |
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2009
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Also Published As
Publication number | Publication date |
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EP2519051B1 (en) | 2015-02-18 |
EP2519051A4 (en) | 2013-08-21 |
RU2012129367A (ru) | 2014-01-27 |
KR101233815B1 (ko) | 2013-02-18 |
BR112012017770A2 (pt) | 2016-04-19 |
CN102668634A (zh) | 2012-09-12 |
US8867489B2 (en) | 2014-10-21 |
AU2010336217B2 (en) | 2014-11-06 |
CN102668634B (zh) | 2013-10-23 |
JP2011135332A (ja) | 2011-07-07 |
SG181943A1 (en) | 2012-08-30 |
PL2519051T3 (pl) | 2015-07-31 |
EP2519051A1 (en) | 2012-10-31 |
RU2524176C2 (ru) | 2014-07-27 |
KR20120081634A (ko) | 2012-07-19 |
AU2010336217A1 (en) | 2012-07-26 |
MX2012007398A (es) | 2012-07-30 |
JP4740368B2 (ja) | 2011-08-03 |
US20120282917A1 (en) | 2012-11-08 |
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