WO2011144145A1 - 切换方法、通信装置和通信系统 - Google Patents

切换方法、通信装置和通信系统 Download PDF

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Publication number
WO2011144145A1
WO2011144145A1 PCT/CN2011/075168 CN2011075168W WO2011144145A1 WO 2011144145 A1 WO2011144145 A1 WO 2011144145A1 CN 2011075168 W CN2011075168 W CN 2011075168W WO 2011144145 A1 WO2011144145 A1 WO 2011144145A1
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WO
WIPO (PCT)
Prior art keywords
mme
handover
access node
attached
information
Prior art date
Application number
PCT/CN2011/075168
Other languages
English (en)
French (fr)
Inventor
刘菁
常宁娟
王可
彭炎
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to ES11783062.0T priority Critical patent/ES2606723T3/es
Priority to MX2012015140A priority patent/MX2012015140A/es
Priority to JP2013514538A priority patent/JP5553938B2/ja
Priority to EP16177405.4A priority patent/EP3142416B1/en
Priority to EP11783062.0A priority patent/EP2547148B1/en
Publication of WO2011144145A1 publication Critical patent/WO2011144145A1/zh
Priority to US13/633,020 priority patent/US8913588B2/en
Priority to ZA2012/09094A priority patent/ZA201209094B/en
Priority to IL223609A priority patent/IL223609B/en
Priority to US14/553,715 priority patent/US9801098B2/en
Priority to US14/558,436 priority patent/US9769709B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016Hand-off preparation specially adapted for end-to-end data sessions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/04Interfaces between hierarchically different network devices
    • H04W92/045Interfaces between hierarchically different network devices between access point and backbone network device
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/16Interfaces between hierarchically similar devices
    • H04W92/20Interfaces between hierarchically similar devices between access points

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a handover method, a communication device, and a communication system. Background technique
  • intra-E-UTRAN intra-Evolved UMTS Terrestrial Radio Access Network
  • Switching types including X2 interface based switching (X2 switching) and S1 interface based switching (S1 switching).
  • the X2 interface is used as a reference point for the X2 interface between the source eNB and the target eNB.
  • the Mobility Management Entity (MME) attached to the User Equipment (UE) does not change. That is, the X2 handover is based on the premise that there is an S1 interface between the source eNB and the MME to which the UE is attached, and the S1 interface exists between the MME and the target eNB to which the UE is attached.
  • the S1 switch uses the S1 interface as a reference point. In this case, the MME attached to the UE may change.
  • the source MME determines whether it needs to change the MME attached to the UE and select a new MME.
  • the embodiment of the invention provides a handover method, a communication device and a communication system, which can enable an access node to switch to a UE.
  • the embodiment of the present invention provides a handover method, including: an access node acquires a mobility management entity pool MME that is sent by a host station of the access node and is used to identify an MME attached to the UE under the coverage of the access node. The information of the pool; when the UE needs to perform handover, the access node performs handover of the UE according to the information of the MME pool for identifying the MME to which the UE is attached.
  • an embodiment of the present invention provides a communication apparatus, including: an acquiring unit, configured to acquire an MME pool that is sent by a host station of the communication device and is used by an MME that is attached to the identifier of the access node and is attached to the MME.
  • the switching unit is configured to perform handover of the UE according to the information about the MME pool used by the acquiring unit to identify the MME that is attached to the UE, when the UE needs to perform handover.
  • embodiments of the present invention also provide a communication system including the above communication device.
  • the embodiment of the present invention further provides another communication apparatus, including: a control unit, configured to control a sending unit to send information; the sending unit is associated with the control unit, and configured to be used according to the control unit Controlling, sending, to the access node, information for identifying the coverage of the access node; the communication device is a host site of the access node.
  • a control unit configured to control a sending unit to send information
  • the sending unit is associated with the control unit, and configured to be used according to the control unit Controlling, sending, to the access node, information for identifying the coverage of the access node
  • the communication device is a host site of the access node.
  • an embodiment of the present invention provides another communication system including the other communication device described above.
  • the access node may successfully switch the MME pool information of the MME attached by the UE sent by the host station of the access node.
  • FIG. 1 is a schematic flowchart of a handover method according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a network structure of a relay system according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a method for an RN to acquire handover type decision information according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of another method for an RN to acquire handover type decision information according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another method for an RN to obtain handover type decision information according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another method for an RN to acquire handover type decision information according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of another method for an RN to acquire handover type decision information according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of a handover mode according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a UMTS terrestrial radio access network evolution network structure according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a communication device according to an embodiment of the present invention
  • FIG. 11 is a schematic structural diagram of a communication system according to an embodiment of the present invention
  • FIG. 13 is a schematic structural diagram of another communication system according to an embodiment of the present invention.
  • an embodiment of the present invention provides a handover method, where the method includes: Step 101: An access node acquires, by a host station of the access node, an identifier of a UE that is used to identify the coverage of the access node.
  • the access station may be an RN in the relay system, or an UMTS terrestrial radio access network in which a Home Evolution Noed B (HeNB) is deployed.
  • HeNB Home Evolution Noed B
  • the host site of the access node refers to a site that connects to the access site through wireless or wired means to provide specific services to the access site.
  • the access site usually accesses the core network side through the host site.
  • the host site may be an eNB; if the access site is a HeNB, the host site may be a HeNB gateway (HeNB GW).
  • HeNB GW HeNB gateway
  • the access node may successfully switch the information of the MME pool of the MME to which the UE is attached, which is sent by the host station of the access node.
  • the UE is located under the coverage of the RN. If the UE is in the coverage range of the current RN through the S1 handover, the RN can use the S1 application protocol in the S1 handover procedure (SI Application Protocol). , SIAP)
  • SIAP SI Application Protocol
  • the message acquires information for identifying the MME pool of the MME to which the UE is attached.
  • the UE may obtain the information of the MME pool for identifying the MME to which the UE is attached by using the S1AP message in the initial context setup process.
  • the RN can be updated by the attach process or tracking area of the UE.
  • the SIAP message of the initial context establishment procedure in the process obtains information for identifying the MME pool of the MME to which the UE is attached.
  • the information used to identify the MME pool of the MME may be a Globally Unique MME Identifier (GUMMEI) or a globally unique group identifier.
  • GUMMEI Globally Unique MME Identifier
  • GUMMEI globally unique MME Identifier
  • the RN may determine, according to the obtained MME pool information of the current UE attached MME, the MME pool of the MME to which the UE is attached and one or more MME pools to which the target access node to be handed over by the UE belongs. Is there the same MME pool?
  • the MME pool refers to a logical area composed of one or more contiguous MMEs. In an MME pool, the UE may not need to change the attached MME to obtain a service. Different MME pools can overlap each other. When the UE attaches to the MME, then the The MME pool of the MME may be referred to as the MME pool of the MME to which the UE is attached.
  • an access node for example, an eNB, or any other node for access, such as an RN, may belong to one or more MME pools. .
  • the access node may use the MME pool for identifying the MME to which the UE is attached.
  • the information is saved.
  • the saved information of the MME pool for identifying the MME to which the UE is attached may be used to determine the MME pool of the MME to which the UE is attached and the target access node to be switched by the UE. Whether one or more of the MME pools have the same MME pool.
  • the information of the MME pool for identifying the MME to which the UE is attached and the MME pool information of the target access node obtained by the access node may be used to determine the MME pool of the MME to which the UE is attached and the target access node to be switched by the UE. Whether one or more of the MME pools have the same MME pool determines the handover type. If the same MME pool exists, it may be determined that the MME attached to the UE does not change, and the handover type is determined to be an X2 handover. If the same MME pool does not exist, the MME attached to the UE may be determined to be changed. S1 switch. Thereby, the access node can perform corresponding handover according to the determined handover type.
  • the S1 interface exists between the RN and the attached eNB, but the S1 interface does not exist between the MME and the MME. Therefore, the RN cannot directly interact with the MME to obtain information about the MME pool for identifying the MME to which the UE attaches.
  • the RN may obtain information for identifying the MME pool of the MME to which the UE is attached, in the process of the S1 handover process, or the attach process of the UE, or the TAU process.
  • the target site RN is in the S1 handover process.
  • the attached eNB may send information to the MME pool for identifying the MME to which the UE is attached in the S1AP message.
  • the target ⁇ ie, ⁇ 2 of the S1 handover sends a handover request Handover Request message to the DeNB.
  • the DeNB sends a Handover Request message to the RN, and the Handover Request message includes information for identifying the MME pool of the MME2 to which the UE is attached.
  • the message format of a Handover Request message is provided in the embodiment of the present invention.
  • the information of the MME pool used to identify the MME2 to which the UE is attached may be identified in the form of a GUMMEI or a GU Group ID.
  • the MME UE SIAP ID is a SIAP ID for identifying the UE on the DeNB
  • the eNB UE SIAP ID is a SIAP ID for identifying the UE on the RN.
  • the RN sends a handover request acknowledgement Handover Request Acknowledge message to the DeNB, and the DeNB will The Handover Request Acknowledge message is sent to MME2.
  • the DeNB may send, to the RN, information about the MME pool for identifying the MME to which the UE is attached, in the MME Status Transfer message.
  • MME2 sends an MME Status transfer message to the DeNB.
  • step 402 the DeNB sends an MME Status transfer message to the RN, where
  • the MME Status transfer message contains information for identifying the MME pool of the MME2 to which the UE is attached. As shown in Table 2, the message format of an MME Status transfer message is provided in the embodiment of the present invention.
  • the information of the MME pool used to identify the MME2 to which the UE is attached may be identified by using a GUMMEI or a GU Group ID.
  • the MME UE SIAP ID is an S 1AP ID for identifying the UE on the DeNB
  • the eNB UE SIAP ID is a SIAP ID for identifying the UE at the RN.
  • the DeNB may also send information about the MME pool of the MME2 that is used to identify the UE to the RN through a new SIAP message.
  • the DeNB sends an SIAP message to the RN.
  • Table 3 a new S1AP message is provided for the RN to provide the RN with information about the MME pool of the MME2 to which the UE is attached, where the MME pool for identifying the MME2 to which the UE is attached is shown.
  • the information can be identified in the form of GUMMEI or GU Group ID.
  • the MME UE SIAP ID is a SIAP ID for identifying the UE on the DeNB
  • the eNB UE SIAP ID is a SIAP ID for identifying the UE on the RN.
  • the DeNB may use an initial context setup request message to be used for identification.
  • the information of the MME pool of the MME attached to the UE is sent to the RN.
  • step 601 the MME2 attached to the UE sends an Initial context setup request message to the DeNB.
  • the DeNB sends an Initial context setup request message to the RN, where the message includes information for identifying the MME pool of the UE to which the UE is attached.
  • the message format of an Initial context setup request message is provided in the embodiment of the present invention.
  • the information of the MME pool used to identify the MME2 to which the UE is attached may be identified in the form of a GUMMEI or a GU Group ID.
  • the MME UE S 1 AP ID is a SIAP ID for identifying the UE on the DeNB
  • the eNB UE SIAP ID is a SIAP ID for identifying the UE on the RN.
  • step 603 and step 604 after receiving the Initial context setup request message, the RN obtains information about the MME pool for identifying the MME2 to which the UE is attached, and sends an initial context setup response message to the DeNB.
  • the DeNB sends an Initial context setup response message to the MME2 to which the UE attaches.
  • information about the MME pool for identifying the MME to which the UE is attached may also be sent to the RN through a new S1AP message.
  • the DeNB sends an S1 AP message to the RN, and the S1 AP message may be a message as shown in Table 3.
  • the UE covered by the RN needs to switch to another target access node, for example, according to the signal strength reported by the UE, the bearer of the current cell, the signal strength of the neighboring cell, the neighbor In the case of area bearer, etc., when switching to other access nodes for better communication,
  • the RN may determine and determine the UE handover type decision information that is obtained and saved according to the method for obtaining the handover type decision information by the RN according to the foregoing embodiment, and determine, according to the handover type decision information, the MME pool of the MME currently attached by the UE and the UE to switch. Whether the one or more MME pools to which the access node belongs has the same MME pool, determines whether the MME attached to the UE changes, and determines the handover type.
  • the RN may perform the decision switching type according to the Handover Request message sent by the eNB in the S1 handover process, or the MME Status transfer message, or the information of the MME pool included in the new S1AP message, which is used to identify the MME currently attached by the UE.
  • the decision switching type is performed according to the Initial context setup request message in the initial context establishment process or the information of the MME pool included in the new S1AP message for identifying the MME currently attached by the UE.
  • FIG. 8 it is a schematic diagram of a handover method provided in an embodiment of the present invention.
  • a UE covered by an RN needs to switch to another target access node.
  • the RN acquires information about the MME pool for identifying the MME to which the UE is attached.
  • the RN may obtain the MME pool for identifying the UE currently attached to the MME by using the method shown in FIG. 3, FIG. 4 or FIG. 5 in the foregoing embodiment. information.
  • the RN may obtain the MME pool information currently attached by the UE by using the method shown in FIG. 6 or FIG. 7 in the foregoing embodiment in the initial context establishment process.
  • the RN may perform the saving.
  • the RN may determine the MME pool according to the saved information of the MME pool used to identify the MME attached to the UE. Types of.
  • the RN determines, according to the acquired information of the MME pool for identifying the MME to which the UE is attached, whether the MME pool of the MME attached to the UE and the one or more MME pools to which the target AP of the handover belongs have the same MME pooL. If the same MME pool exists, go to step 803. If the same MME pool does not exist, go to step 804.
  • the DeNB may inform the RN of the MME pool information to which the neighboring access node of the RN belongs, and the neighbor access node includes the target access node to be handed over by the UE.
  • the DeNB may send the MME pool information to which the neighbor access node belongs to the X2 setup response message to the RN; if the X2 interface establishment process is initiated by the DeNB, Then, the DeNB may carry the MME pool information that the neighboring access node belongs to in the X2 setup request message to the RN.
  • the neighboring access node of the RN When the neighboring access node of the RN is updated, for example, a new neighboring access node is found, or the MME pool information to which the existing neighboring access node belongs is updated, if the neighboring access node of the RN is attached to the RN.
  • the DeNB When the X2 interface between the DeNBs is successfully established or the neighboring access node of the RN initiates an eNB configuration update process on the X2 interface to the DeNB, the DeNB triggers an eNB configuration update procedure on the X2 interface between the DRN and the RN. The RN is notified of the identifier of the neighboring access node that has been updated and the MME pool information corresponding to the neighboring access node.
  • the MME obtains the MME pool information of the MME for identifying the UE attachment, and the MME pool information to which the target access node belongs, and may determine the MME pool of the MME to which the UE is attached and one or more MME pools to which the target access node belongs. Whether the same MME pool exists.
  • step 803 the RN determines to perform the X2 handover and performs the X2 handover.
  • the handover type is determined to be an X2 handover, and the X2 handover is performed.
  • the access node such as the RN in this embodiment, needs to consider that the X2 interface between the access node and the target access node is available when determining that the handover type is X2 handover.
  • the X2 interface between the access node and the target access node is segmented, including an X2 interface between the access node and the host site of the access node, the host site of the access node and the target access node An X2 interface between the attached host sites, and an X2 interface between the host site to which the target access node is attached and the target access node, and therefore, when these X2 interfaces When available, the X2 interface between the access node and the target access node is available.
  • step 804 the RN determines to perform the S1 handover and performs the S1 handover.
  • the handover type is determined to be S1 handover, and the S1 handover is performed.
  • the MME where the UE is currently located includes multiple subordinate cells ECGI1, ECGI2, and ECGI3, and the MME pool of the MME to which the UE is attached is MME pool2.
  • the destination access node to be handed over by the UE includes the subordinate cells ECGI4, ECGI5, and ECGI6, and the MME pool to which the destination access node belongs has MME pool2 and MME pool3.
  • the RN obtains the target cell ECGI5 as the destination access node according to the neighbor information.
  • the RN may obtain information about the MME pool that is used by the MME to identify the current MME, and determine that the MME pool of the MME to which the current UE is attached is the MME pool 2, and the MME pool 2 and the MME pool 3 included in the MME pool list to which the destination access node belongs. In the case that there is the same MME pool 2, the RN determines to perform the X2 handover.
  • the RN obtains information about the MME pool for identifying the MME to which the UE is attached, and according to the information, may determine one or more MME pools of the MME to which the UE is attached and the target access node to which the handover belongs. Whether there is the same MME pool in the MME pool can correctly determine the type of handover required for handover, and then perform handover.
  • an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) network architecture for deploying a HeNB is provided in the 3GPP protocol.
  • the HeNB1 when the UE moves from the currently located HeNB 1 to other target access nodes, for example to eNB1, the HeNB1 also needs to make a decision handover type.
  • the method provided in the foregoing embodiment of the present invention is also applicable to the HeNB1 acquiring the handover type decision information, and determining whether to use the S1 handover or the X2 handover according to the handover type decision information.
  • the HeNB1 may obtain the information of the MME pool for identifying the MME to which the UE is attached by using the S1AP message sent by the HeNB gateway (HeNB GW) to the HeNB1 in the S1 handover procedure. , used to identify the UE attached
  • the information of the MME pool of the MME may be GUMMEI or GU Group ID.
  • the HeNB GW sends a Handover Request message to the HeNB1 in the SI handover procedure.
  • the Handover Request message carries information about the MME pool of the MME that is attached to the UE.
  • the message format of the Handover Request message is as shown in Table 1.
  • the HeNB GW may send the MME Status transfer message to the HeNB, where the MME Status transfer message carries the information of the MME pool for identifying the MME to which the UE is attached.
  • the message format of the MME Status transfer message may be as shown in Table 2.
  • the HeNB GW may send the information about the MME pool of the MME that is used by the UE to the RN through a new S1AP message.
  • the message format of the S1 AP message may be as shown in Table 3.
  • the HeNB GW may send, by using an Initial context setup request message, information about an MME pool for identifying an MME to which the UE is attached, to the HeNB1, the Initial context setup request message.
  • the message format can be as shown in Table 4.
  • the information of the MME pool for identifying the MME to which the UE is attached may also be sent to the HeNB1 by the HeNB GW through a new S1AP message.
  • the message format of the new S1AP message can be as shown in Table 3.
  • the handover type decision can be correctly performed by using the method provided by the embodiment of the present invention.
  • the source node may obtain the handover decision type information, and determine the handover type at the time of handover, which solves the problem that the source node cannot be correctly implemented in the prior art.
  • the problem of decision switching type is a problem that the source node cannot be correctly implemented in the prior art.
  • the communication device 10 includes an obtaining unit 120 and a switching unit 140.
  • the obtaining unit 120 is configured to acquire information about an MME pool that is sent by the host station of the communication device 10 and that is used to identify an MME that is attached to the communication device 10 to identify an MME.
  • the switching unit 140 is configured to: when the UE needs to perform handover. The UE is switched according to the information about the MME pool used by the acquiring unit 120 to identify the MME to which the UE is attached. After obtaining the information about the MME pool for identifying the MME to which the UE is attached, the acquiring unit 120 may save the information of the MME pool for identifying the MME to which the UE is attached.
  • the handover type may be determined according to the information of the MME pool that is obtained and saved according to the acquisition unit 120 and used to identify the MME to which the UE is attached, so as to switch according to the determined handover type.
  • the communication device 10 may relay the RN in the system, or deploy the HeNB in the E-UTRAN network of the HeNB. If the communication device 10 is an RN, the host station may be an eNB. If the communication device 10 is a HeNB, the host station may be a HeNB. GW.
  • the information about the MME pool used to identify the MME to which the UE is attached may be GUMMEI or GU Group ID.
  • the obtaining unit 120 may be configured to send according to the destination host site.
  • the information of the MME pool for identifying the MME to which the UE attaches is obtained in the handover request message or the MME state transmission message or an S1 application protocol S1AP message; the S1AP message is used to transmit the MME for identifying the MME to which the UE is attached
  • the information of the pool, the handover request message, the MME state transmission message, and the S1AP message include the information about the MME pool used to identify the MME to which the UE is attached.
  • the method for obtaining the handover request message or the MME state transmission message or the S1 application protocol S1AP message sent by the destination device in the communication device 10 may be referred to the embodiment of the present invention.
  • the handover request message may be a handover request message shown in Table 1
  • the MME status transmission message may be an MME Status transfer message shown in Table 2, the S1 AP.
  • the message can be the message shown in Table 3.
  • an initial context setup request message or an S1AP message sent in the process obtains information about an MME pool for identifying an MME to which the UE attaches, the initial context.
  • Establishing a request message and said The S1AP message includes the information about the MME pool that is used to identify the MME to which the UE is attached.
  • the S1AP message is used to transmit the information about the MME pool used to identify the MME to which the UE is attached.
  • the obtaining unit 120 obtains an initial context setup request message or an S1AP message sent by the host station in the UE attach procedure or the tracking area update process, and may refer to FIG. 6 and the embodiment of the present invention.
  • the initial context setup request message may be the message described in Table 4, and the S1AP message may be the message shown in Table 3.
  • the switching unit 140 may further include a determining subunit 1401 and a switching subunit 1402.
  • the determining subunit 1401 is configured to determine the handover type for the information of the MME pool for identifying the MME to which the UE is attached.
  • the determining sub-unit 1401 may determine, according to the information about the MME pool used to identify the MME to which the UE is attached, whether the MME pool of the MME to which the UE is attached and one or more MME pools to which the target AP of the handover belongs have the same MME pool. If the same MME pool exists, the access node determines that the handover type is X2 handover; if the same MME pool does not exist, the access node determines that the handover type is SI handover.
  • the determining subunit 1401 may determine that the MME attached by the UE does not change when the same MME pool exists, and determine that the handover type is X2 handover, and the handover subunit 1402 performs X2 handover.
  • the determining subunit 1401 determines that the MME attached to the UE has changed when the same MME pool does not exist, and determines that the switching type is S1 switching, and the switching subunit 1402 performs S1 switching.
  • the obtaining unit 120 may further acquire the MME pool information of the target access node that is sent by the host station by using the X2 receiving establishment procedure or the eNB configuration update procedure between the communication device 10 and the host station. And determining, by the determining, the sub-unit 1401, according to the information about the MME pool that is used to identify the MME to which the UE is attached, and the target access node MME pool information, determining that the MME pool of the MME to which the UE is attached and one of the target access nodes belong to Whether multiple MME pools have the same MME pool.
  • the handover type of the handover to be performed by the UE may be determined according to the information of the MME pool of the MME for identifying the UE attached by the host station of the communication apparatus, and the handover is successfully performed.
  • FIG. 11 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • the communication system includes a communication device 10 as shown in FIG. 10 and a host site 20 of the communication device 10.
  • the communication device 10 is configured to receive information about a mobility management entity pool MME pool sent by the host site 20 for identifying an MME to which the UE is attached, and perform handover of the UE according to the information of the MME pool of the MME for the UE to attach.
  • the method for the communication device 10 to receive the information about the MME pool of the MME to which the UE is attached is sent by the host node 20, and the method shown in FIG. 3 to FIG. 7 provided by the embodiment of the present invention may be used for communication.
  • the method for the device 10 to perform the handover reference may be made to the method shown in FIG. 8 of the embodiment of the present invention, and details are not described herein again.
  • the present invention provides another communication device 30, which can include:
  • the control unit 320 is configured to control the sending unit 340 to send information.
  • the sending unit 340 is associated with the control unit 320, and configured to send, according to the control of the control unit 320, the communication device 30, which is used to identify the user equipment covered by the access node, to the access node.
  • the host site of the access node is associated with the control unit 320, and configured to send, according to the control of the control unit 320, the communication device 30, which is used to identify the user equipment covered by the access node, to the access node.
  • the host site of the access node is associated with the control unit 320, and configured to send, according to the control of the control unit 320, the communication device 30, which is used to identify the user equipment covered by the access node, to the access node.
  • the communication device 30 may be an eNB, and the access point may be an RN; or the communication device 30 may be a HeNB GW, and the access point may be an HeNB.
  • the sending unit 340 sends, to the access node, the information about the MME pool used to identify the MME to which the UE is attached, for the access node to use according to the MME for identifying the UE attached.
  • the information of the MME pool performs handover of the UE.
  • the method for the UE to perform handover reference may be made to the method provided by the method embodiment shown in FIG. 8 above.
  • the sending unit 340 may send, by using a handover request message, or an MME status transmission message or an S1 application protocol S1AP message, information about the MME pool for identifying the MME to which the UE is attached, to the access node. For example, it may be transmitted by the method embodiment as shown in FIG. 3, 4 or 5 above. Alternatively, the sending unit 340 may use the initial context setup request message or the S1AP message in the initial context setup process to identify the UE. The information of the MME pool of the attached MME is sent to the access node, for example, by the method provided by the method embodiment shown in FIG. 6 or FIG. 7 above.
  • the information about the MME pool used to identify the MME to which the UE is attached may be GUMMEI or GU Group ID.
  • the communication device 30 may send the MME pool information for identifying the UE-assisted MME to the access point, so that the access point may determine the handover type to be switched by the UE, and perform successful handover.
  • the communication system can include a communication device 30 as shown in FIG. 12, and can also include an access point 40 attached to the communication device 30.
  • the communication device 30 may send information to the access point 40 for identifying the mobility management entity pool MME pool of the MME to which the UE attaches, so that the access point 40 may perform the UE according to the information of the MME pool of the MME for the UE attachment. Switching.
  • the communication device 30 sends the information about the MME pool of the MME to which the UE is attached to the access point 40, and the method shown in any one of FIG. 3 to FIG. 7 provided by the embodiment of the present invention may be referred to.
  • the access point 40 to perform the handover refer to the method shown in FIG. 8 of the embodiment of the present invention, and details are not described herein again.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better.
  • Implementation Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A computer device (which may be a personal computer, a server, or a network device, etc.) performs the methods described in various embodiments of the present invention.

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Description

切换方法、 通信装置和通信系统 本申请要求于 2010 年 6 月 28 日提交中国专利局、 申请号为 201010216472.2、 发明名称为"切换方法、 通信装置和通信系统 "的中国专利 申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域, 特别涉及一种切换方法、 通信装置和通信 系统。 背景技术
在长期演进( Long Term Evolution, LTE ) 系统中, 在演进 UMTS陆地 无线接入网内 ( intra-Evolved UMTS Terrestrial Radio Access Network, intra-E-UTRAN ), 基于切换参考点的不同, 可以有两种切换类型, 包括基 于 X2接口的切换( X2切换 )和基于 S1接口的切换( S1切换)。
X2切换以源基站 ( eNB )和目标 eNB之间的 X2接口为参考点, 在切 换过程中, 用户设备 ( User Equipment , UE )附着的移动管理实体( Mobility Management Entity, MME ) 不会发生改变, 即 X2切换以源 eNB和 UE附 着的 MME之间存在 S1接口以及 UE附着的 MME和目标 eNB之间存在 S1 接口为前提。 S1切换以 S1接口为参考点, 此时 UE附着的 MME可能会发 生变化 , 由源 MME决策是否需要改变 UE附着的 MME并选取新 MME。
当 LTE系统中引入了中继节点 ( Relay Node, RN )后, 对于 RN覆盖 范围内的 UE的切换, RN无法正确决策切换类型。 发明内容
本发明实施例提供了一种切换方法、 通信装置和通信系统, 可以使得 接入节点可以对 UE进行切换。 一方面, 本发明实施例提供了一种切换方法, 包括: 接入节点获取该 接入节点的宿主站点发送的用于标识所述接入节点覆盖下的 UE 附着的 MME的移动管理实体池 MME pool的信息; 当所述 UE需要进行切换时, 所述接入节点根据所述用于标识 UE附着的 MME的 MME pool的信息进行 UE的切换。
另一方面, 本发明实施例提供了一种通信装置, 包括: 获取单元, 用 于获取所述通信装置的宿主站点发送的用于所述接入节点覆盖下的标识 UE附着的 MME的 MME pool的信息; 切换单元, 用于当所述 UE需要进 行切换时根据所述获取单元获取的所述用于标识 UE附着的 MME的 MME pool的信息进行 UE的切换。
另一方面, 本发明实施例还提供了一种通信系统, 该通信系统包括上 述的通信装置。
另一方面, 本发明实施例还提供了另一种通信装置, 包括: 控制单元, 用于控制发送单元发送信息; 所述发送单元与所述控制单元相关联, 用于 根据所述控制单元的控制, 向接入节点发送用于标识所述接入节点覆盖下 信息; 所述通信装置为所述接入节点的宿主站点。
另一方面, 本发明实施例还提供了另一种通信系统, 该通信系统包括 上述的所述另一种通信装置。
根据本发明实施例提供的技术方案, 接入节点在对 UE进行切换时, 可 以通过该接入节点的宿主站点发送的该 UE附着的 MME的 MME pool信息进 行成功的切换。 附图说明
图 1所示为本发明实施例提供的一种切换方法的流程示意图; 图 2所示为本发明实施例中的一种中继系统网络结构示意图; 图 3所示为本发明实施例提供的一种 RN获取切换类型判决信息的方法 的示意图;
图 4所示为本发明实施例提供的另一种 RN获取切换类型判决信息的方 法的示意图;
图 5所示为本发明实施例提供的另一种 RN获取切换类型判决信息的方 法的示意图;
图 6所示为本发明实施例提供的另一种 RN获取切换类型判决信息的方 法的示意图;
图 7所示为本发明实施例提供的另一种 RN获取切换类型判决信息的方 法的示意图;
图 8所示为本发明实施例提供的一种切换方式的流程示意图; 图 9所述为本发明实施例中一种 UMTS陆地无线接入网演进网络结构 示意图;
图 10所示为本发明实施例提供的一种通信装置的结构示意图; 图 11所示为本发明实施例提供的一种通信系统的结构示意图; 图 12所示为本发明实施例提供的另一种通信装置的结构示意图; 图 13所示为本发明实施例提供的另一种通信系统的结构示意图。 具体实施方式
为了使本发明的具体技术方案更加清楚, 下面结合具体的实施方式和 附图作进一步说明。
如图 1所示, 本发明实施例提供了一种切换方法, 该方法包括: 步骤 101 :接入节点获取该接入节点的宿主站点发送的用于标识所述接 入节点覆盖下的 UE附着的 MME的移动管理实体池 MME pool的信息; 步骤 102: 当所述 UE需要进行切换时, 所述接入节点根据所述用于标 识 UE附着的 MME的 MME pool的信息进行 UE的切换。 在本发明实施例中, 接入站点可以为中继系统中的 RN, 或者部署家庭 演进基站( Home evolution Noed B, HeNB )的 UMTS陆地无线接入网演进
( Evolved UMTS Terrestrial Radio Access Network, E-UTRAN ) 网络中的 HeNB。接入节点的宿主站点是指通过无线或者有线的方式与接入站点相连 接, 为接入站点提供特定服务的站点, 接入站点通常通过宿主站点接入核 心网侧。 例如, 接入站点为 RN, 则宿主站点可以为 eNB; 若接入站点为 HeNB, 则宿主站点可以为 HeNB网关(HeNB Gateway, HeNB GW )„
根据本发明实施例提供的方法,接入节点在对 UE进行切换时,可以通 过该接入节点的宿主站点发送的标识该 UE附着的 MME的 MME pool的信 息进行成功的切换。
如图 2所示的中继系统中, UE位于 RN的覆盖范围下, 若该 UE是通 过 S1切换进入到当前 RN的覆盖范围, 则 RN可以通过 S1切换流程中的 S1应用协议( SI Application Protocol, SIAP ) 消息获取用于标识 UE附着 的 MME的 MME pool的信息。 或者, UE可以通过初始上下文建立( Initial context setup )流程中的 S1AP消息获取该用于标识 UE附着的 MME的 MME pool的信息。 例如, RN可以通过 UE的附着(attach )流程或者跟踪区更新
( Track Area Update, TAU ) 流程中的初始上下文建立流程的 SIAP消息获 取用于标识 UE附着的 MME的 MME pool的信息。
用于标识 MME的 MME pool的信息可以为全球唯一移动管理实体标识 符( Globally Unique MME Identifier, GUMMEI )或者全球唯一组标识符
( Globally Unique Group ID, GU Group ID )0 RN可以根据获取的当前 UE 附着 MME的 MME pool信息, 确定 UE附着的 MME的 MME pool和 UE 所要切换的目标接入节点所属的一个或者多个 MME pool中是否有相同的 MME pool。 MME pool是指由一个或多个等同的( parallel ) MME组成的逻 辑区域, 在一个 MME pool中 , UE可以不需要改变附着的 MME来获取服 务。 不同的 MME pool之间可以互相重叠。 当 UE附着到 MME上时, 则该 MME的 MME pool即可称为 UE附着的 MME的 MME pool; 对于一个接 入节点而言, 例如 eNB, 或者 RN等任何其它用于接入的节点, 其所属的 MME pool可以是一个或多个。
在本发明实施例中, 接入节点在接收到该接入节点的宿主站点发送的 用于标识 UE附着的 MME的 MME pool的信息后 , 可以将该用于标识 UE 附着的 MME的 MME pool的信息进行保存。 当以后该接入节点需要对该 UE进行切换时, 该保存的用于标识 UE附着的 MME的 MME pool的信息 可以用于确定 UE附着的 MME的 MME pool和 UE所要切换的目标接入节 点所述的一个或多个 MME pool是否有相同的 MME pool。 进一步, 可以将 该用于标识 UE附着的 MME的 MME pool的信息与该接入节点获得的目标 接入节点的 MME pool信息确定 UE附着的 MME的 MME pool和 UE所要 切换的目标接入节点所述的一个或多个 MME pool 是否有相同的 MME pool, 确定切换类型。 若存在相同的 MME pool, 则可以确定 UE 附着的 MME没有发生改变,可以确定切换类型为 X2切换,若不存在相同的 MME pool, 则可以确定 UE附着的 MME发生了改变, 可以确定切换类型为 S1 切换。 从而接入节点可以根据确定的切换类型进行相应的切换。
由于 RN与该 RN的附着 eNB之间存在 S1接口 , 但与 MME之间不存 在 S1接口, 因此, RN无法直接与 MME进行交互获得用于标识 UE附着 的 MME的 MME pool的信息。 在本实施例中, RN可以通过在 S1切换流 程, 或者 UE的 attach流程, 或者是 TAU流程等流程中获取用于标识 UE 附着的 MME的 MME pool的信息。
例如, 如图 2所示的网络系统中, 若 UE通过 S1切换流程切换到当前 RN的覆盖范围中, 例如 UE通过 S1切换从 eNBl切换到 RN下, 则在此 S1切换过程中, 目标站点 RN附着的 eNB ( Donor eNB, DeNB )可以通过 在 S1AP消息中将用于标识 UE附着的 MME的 MME pool的信息发送给 鳳 在 UE从 eNBl切换到 RN的过程中, 如图 3所示, 在步骤 301中, S1 切换的目标 ΜΜΕ (即 ΜΜΕ2 ) 向 DeNB发送切换请求 Handover Request 消息。在步骤 302中, DeNB向 RN发送 Handover Request消息,并在 Handover Request消息中包含了用于标识 UE附着的 MME2的 MME pool的信息。如 表 1所示, 为本发明实施例提供的一种 Handover Request消息的消息格式。 其中, 用于标识 UE附着的 MME2的 MME pool的信息可以用 GUMMEI 或者 GU Group ID的形式来标识。 在表 1中, MME UE SIAP ID为用于在 DeNB上标识该 UE的 SIAP ID, eNB UE SIAP ID为用于在该 RN上标识 该 UE的 SIAP ID。
Figure imgf000009_0001
表 1
在步骤 303和 304中, RN在接收到该 Handover Request消息后, 向 DeNB发送切换请求确认 Handover Request Acknowledge消息, DeNB将该 Handover Request Acknowledge消息发送给 MME2。
也可以如图 4所示 , DeNB可以在 MME状态传输( MME Status transfer ) 消息中将用于标识 UE附着的 MME的 MME pool的信息发送给 RN。 在步 骤 401中, MME2向 DeNB发送 MME Status transfer消息。
在步骤 402中, DeNB向 RN发送 MME Status transfer消息, 并在该
MME Status transfer消息中包含了用于标识 UE附着的 MME2的 MME pool 的信息。如表 2所示,为本发明实施例提供的一种 MME Status transfer消息 的消息格式。 其中, 用于标识 UE附着的 MME2的 MME pool的信息可以 用 GUMMEI或者 GU Group ID的形式来标识。在表 2中, MME UE SIAP ID 为用于在 DeNB上标识该 UE的 S 1AP ID , eNB UE SIAP ID为用于在该 RN 上 识该 UE的 SIAP ID。
Figure imgf000010_0002
Figure imgf000010_0001
或者, 在本实施例中, DeNB也可以通过一种新的 SIAP消息将用于标 识 UE附着的 MME2的 MME pool的信息发送给 RN, 如图 5所示, DeNB 向 RN发送一种 SIAP消息, 如表 3所示, 为本发明实施例提供的一种新的 S1AP消息,用于向 RN提供用于标识 UE附着的 MME2的 MME pool的信 息,其中,用于标识 UE附着的 MME2的 MME pool的信息可以用 GUMMEI 或者 GU Group ID的形式来标识。 在表 3中, MME UE SIAP ID为用于在 DeNB上标识该 UE的 SIAP ID, eNB UE SIAP ID为用于在该 RN上标识 该 UE的 SIAP ID。
Figure imgf000011_0001
VU'. pool J ) 在本发明实施例中, 在 UE 进行初始上下文建立流程中, 例如在 UE attach流程或者 TAU流程等流程中, DeNB可以通过初始上下文建立请求 Initial context setup request消息将用于标识 UE附着的 MME的 MME pool 的信息发送给 RN。
如图 6所示, 在步骤 601 中, UE附着的 MME2向 DeNB发送 Initial context setup request消息。
在步骤 602中 , DeNB向 RN发送 Initial context setup request消息 , 该 消息中包含用于标识 UE附着的 ΜΜΕ2的 MME pool的信息。如表 4所示 , 为本发明实施例提供的一种 Initial context setup request消息的消息格式。 其 中 ,用于标识 UE附着的 MME2的 MME pool的信息可以用 GUMMEI或者 GU Group ID的形式来标识。 在表 4中, MME UE S 1 AP ID为用于在 DeNB 上标识该 UE的 SIAP ID, eNB UE SIAP ID为用于在该 RN上标识该 UE 的 SIAP ID。
Figure imgf000012_0001
表 4
步骤 603和步骤 604中, RN在接收到 Initial context setup request消息 后 , 获取用于标识 UE附着的 MME2的 MME pool的信息 , 并向 DeNB发 送初始上下文建立响应 Initial context setup response消息。 DeNB向 UE附着 的 MME2发送 Initial context setup response消息。
在初始上下文建立流程中 ,也可以通过一个新的 S 1AP消息将用于标识 UE附着的 MME的 MME pool的信息发送给 RN。 如图 Ί所示, DeNB向 RN发送一种 S 1 AP消息, 该 S 1 AP消息可以为如表 3所示的消息。
在本发明实施例中,若 RN覆盖下的 UE需要切换到其它目标接入节点, 例如根据 UE测量上报的信号强度, 当前小区的承载, 邻区的信号强度, 邻 区承载等情况, 切换到其它的接入节点可以更好地进行通信时, 可以进行
UE的切换。 RN可以根据上述实施例描述的 RN获取切换类型判决信息的 方法获取并保存的用于标识 UE切换类型判决信息,并根据切换类型判决信 息确定 UE当前附着的 MME的 MME pool与 UE所要切换的目的接入节点 所属的一个或多个 MME pool是否有相同的 MME pool, 确定 UE附着的 MME是否发生改变, 决策切换类型。 例如, RN可以根据在 S1切换过程中 eNB发送的 Handover Request消息,或者 MME Status transfer消息,或者一 种新的 S1AP消息中包含的用于标识 UE当前附着的 MME的 MME pool的 信息进行决策切换类型; 或者根据初始上下文建立流程中 Initial context setup request消息或一种新的 S1AP消息中包含的用于标识 UE当前附着的 MME的 MME pool的信息进行决策切换类型。
如图 8所示, 为本发明实施例中提供的一种切换方法示意图, 在本实 施例中, RN覆盖下的 UE需要切换到其它目标接入节点。
步骤 801中, RN获取用于标识 UE附着的 MME的 MME pool的信息。 在本实施例中, 若 UE是通过 S1切换切换到当前 RN下时, RN可以 通过上述实施例中图 3、 图 4或图 5所示的方法获取用于标识 UE当前附着 MME的 MME pool的信息。 或者, 若 UE通过 attach流程或 TAU流程接入 到 RN 下时, RN可以在初始上下文建立流程中, 通过上述实施例中图 6 或图 7所示的方法获取 UE当前附着的 MME pool信息。 RN通过上述方法 获得用于标识 UE附着的 MME的 MME pool的信息后, 可以进行保存, 当 RN需要对 UE进行切换时, 可以根据保存的用于标识 UE附着的 MME的 MME pool的信息确定判决类型。
步骤 802中, RN根据获取的用于标识 UE附着的 MME的 MME pool 的信息,确定 UE附着的 MME的 MME pool与切换的目标接入节点所属的 一个或多个 MME pool是否有相同的 MME pooL若存在相同的 MME pool, 执行步骤 803; 若不存在相同的 MME pool, 执行步骤 804。 RN与该 RN附着的 DeNB建立 X2接口时, DeNB可以将 RN的邻居 接入节点所属的 MME pool信息告知 RN, 邻居接入节点包含了 UE所要切 换的目标接入节点。 如果 X2接口建立流程是由 RN发起的, 则 DeNB可以 将邻居接入节点所属的 MME pool信息携带在 X2 建立响应 (X2 setup response )消息发送给 RN;若 X2接口建立流程是由 DeNB发起的,则 DeNB 可以将邻居接入节点所属的 MME pool信息携带在 X2建立请求( X2 setup request ) 消息中发送给 RN。
当 RN的邻居接入节点进行了更新, 例如, 发现了新的邻居接入节点, 或已有的邻居接入节点所属的 MME pool信息发生了更新,若 RN的邻居接 入节点与 RN附着的 DeNB之间的 X2接口建立成功或 RN的邻居接入节点 向 DeNB发起 X2接口上的 eNB配置更新( eNB configuration update )流程 时, DeNB触发和 RN之间的 X2接口上的 eNB configuration update流程, 并将发生更新的邻居接入节点的标识及该邻居接入节点对应更新的 MME pool信息告知 RN。
RN在获取到用于标识 UE附着的 MME的 MME pool信息, 以及目标 接入节点所属的 MME pool信息 ,则可以确定 UE附着的 MME的 MME pool 与目标接入节点所属的一个或多个 MME pool是否存在相同的 MME pool。
步骤 803中, RN确定进行 X2切换, 并进行 X2切换。
若确定存在相同的 MME pool,则确定 UE附着的 MME没有发生改变, 则确定切换类型为 X2切换, 进行 X2切换。
进一步, 在本发明实施例中, 接入节点, 如本实施例中的 RN, 在确定 切换类型为 X2切换时, 还需考虑该接入节点与目标接入节点之间的 X2接 口是可用的。接入节点与目标接入节点之间的 X2接口是分段的, 包括接入 节点与该接入节点的宿主站点之间的 X2接口,该接入节点的宿主站点与所 述目标接入节点附着的宿主站点之间的 X2接口,以及所述目标接入节点附 着的宿主站点与所述目标接入节点之间的 X2接口, 因此, 当这些 X2接口 都可用时, 接入节点与目标接入节点之间的 X2接口为可用。
步骤 804中, RN确定进行 S1切换, 并进行 S1切换。
若确定不存在相同的 MME pool,则确定 UE附着的 MME发生了改变, 则确定切换类型为 S1切换, 进行 S1切换。
例如, UE 当前所位于的 RN下包含多个下属小区 ECGI1、 ECGI2和 ECGI3 , UE附着的 MME的 MME pool为 MME pool2。 UE所要切换的目 的接入节点包含下属小区 ECGI4、 ECGI5和 ECGI6 , 目的接入节点所属的 MME pool有 MME pool2和 MME pool3。 当 UE需要从当前所在的 ECGI1 切换到 ECGI5中, RN根据邻区信息获得目标小区 ECGI5属于目的接入节 点。 RN可以获取用于标识 UE当前附着 MME的 MME pool的信息, 并据 此确定当前 UE附着的 MME的 MME pool为 MME pool2,与目的接入节点 所属的 MME pool列表中包含的 MME pool2和 MME pool3中, 有相同的 MME pool2则 RN确定进行 X2切换。
根据本发明实施例提供的方案, RN获得用于标识 UE附着的 MME的 MME pool的信息, 并根据该信息可以确定 UE附着的 MME的 MME pool 与切换的目标接入节点所属的一个或多个 MME pool中是否有相同的 MME pool, 可以正确地确定切换所需要的切换类型, 进而进行切换。
如图 9所示, 为 3GPP协议中提供的一种部署 HeNB的 UMTS陆地无 线接入网演进 ( Evolved UMTS Terrestrial Radio Access Network, E-UTRAN ) 网络架构。 在该网络架构中, 当 UE从当前所处的 HeNB 1向其它目标接入 节点, 例如向 eNBl切换时, HeNBl也需要进行决策切换类型。 在本发明 实施例中, 本发明实施例中上述提供的方法同样适用于 HeNBl获取切换类 型判决信息, 并根据切换类型判决信息确定釆用 S1切换或者 X2切换。
若 UE是通过 S1切换进入到当前 HeNBl的覆盖范围中, 则 HeNBl可 以在该 S1切换流程中通过 HeNB网关( HeNB GW )发送给 HeNBl的 S1AP 消息获取用于标识 UE附着的 MME的 MME pool的信息 , 用于标识 UE附 着的 MME的 MME pool的信息可以为 GUMMEI或者 GU Group ID。 例如 HeNB GW在 SI切换流程中向 HeNBl发送 Handover Request消息, 该 Handover Request消息中携带用于标识 UE附着的 MME的 MME pool的信 息, 该 Handover Request消息的消息格式可以如表 1所示。 或者 HeNB GW 可以向 HeNB发送 MME Status transfer消息,在该 MME Status transfer消息 中携带用于标识 UE附着的 MME的 MME pool的信息, 该 MME Status transfer消息的消息格式可以如表 2所示。 或者, HeNB GW也可以通过一 种新的 S1AP消息将用于标识 UE附着的 MME的 MME pool的信息发送给 RN , 该 S 1 AP消息的消息格式可以如表 3所示。
或者, 在建立初始上下文建立流程, 例如 attach流程或 TAU流程中, HeNB GW可以通过 Initial context setup request消息将用于标识 UE附着的 MME的 MME pool的信息发送给 HeNBl , 该 Initial context setup request消 息的消息格式可以如表 4所示。 也可以由 HeNB GW通过一个新的 S1AP 消息将用于标识 UE附着的 MME的 MME pool的信息发送给 HeNBl。 该 新的 S1AP消息的消息格式可以如表 3所示。
在如图 9所示的网络架构中,当处于 HeNB覆盖下的 UE要进行切换时, 可以通过本发明实施例提供的方法正确地进行切换类型判决。
根据本发明实施例提供的方法,附着在 RN或 HeNB下的 UE在发生切 换时, 源节点可以获取切换判决类型信息, 并确定切换时的切换类型, 解 决了现有技术中源节点无法进行正确决策切换类型的问题。
如图 10所述, 为本发明实施例提供的一种通信装置 10, 该通信装置 10包括获取单元 120和切换单元 140。
获取单元 120用于获取所述通信装置 10的宿主站点发送的用于标识所 述通信装置 10覆盖下的标识 UE附着的 MME的 MME pool的信息; 切换 单元 140用于当所述 UE需要进行切换时,根据所述获取单元 120获取得到 的所述用于标识 UE附着的 MME的 MME pool的信息进行 UE的切换。 所述获取单元 120在获取得到所述用于标识 UE附着的 MME的 MME pool的信息后,可以将该用于标识 UE附着的 MME的 MME pool的信息进 行保存。 当切换单元 140需要对 UE进行切换时, 可以根据根据获取单元 120获取得到并保存的用于标识 UE附着的 MME的 MME pool的信息确定 切换类型, 从而根据确定的切换类型进行切换。
通信装置 10可以中继系统中的 RN, 或者部署 HeNB的 E-UTRAN网 络中的 HeNB, 若通信装置 10为 RN, 则宿主站点可以为 eNB, 若通信装 置 10为 HeNB, 则宿主站点可以为 HeNB GW。
所述用于标识 UE附着的 MME的 MME pool的信息可以为 GUMMEI 或者 GU Group ID。
当通信装置 10为所述通信装置为 S1切换流程中的目的接入节点, 所 述宿主站点为所述 S1切换流程中的目的宿主站点时, 获取单元 120可以用 于根据所述目的宿主站点发送的切换请求消息或 MME状态传输消息中或 一种 S1应用协议 S1AP消息获得用于标识 UE附着的 MME的 MME pool 的信息; 所述 S1AP消息用于传输所述用于标识 UE附着的 MME的 MME pool的信息, 所述切换请求消息、 所述 MME状态传输消息和所述 S1AP消 息中包含所述用于标识 UE附着的 MME的 MME pool的信息。在本实施例 中, 通信装置 10中的获取单元 120获得所述目的所述站点发送的切换请求 消息或 MME状态传输消息中或一种 S1应用协议 S1AP消息的方法可以参 照本发明实施例提供的如图 3、 图 4和图 5中提供的方法, 该切换请求消息 可以为表 1所示的切换请求消息,该 MME状态传输消息可以为表 2所示的 MME Status transfer消息, 该 S 1 AP消息可以为表 3所示的消息。
或者, 在初始上下文建立流程中, 例如 UE attach流程或 TAU流程中, 流程中发送的初始上下文建立请求消息或一种 S1AP消息获得用于标识 UE 附着的 MME的 MME pool的信息, 所述初始上下文建立请求消息和所述 S1AP消息中包含所述用于标识 UE附着的 MME的 MME pool的信息; 所 述 S 1AP消息用于传输所述用于标识 UE附着的 MME的 MME pool的信息。 在本实施例中 ,获取单元 120获得所述宿主站点在 UE附着流程或跟踪区更 新流程中发送的初始上下文建立请求消息或一种 S 1AP 消息的方法可以参 照本发明实施例图 6和图 Ί所示的方法。 该初始上下文建立请求消息可以 为表 4所述的消息, 该 S1AP消息可以为表 3所示的消息。
所述切换单元 140 可以进一步包括确定子单元 1401 和切换子单元 1402。 确定子单元 1401用于所述用于标识 UE附着的 MME的 MME pool 的信息确定切换类型。 确定子单元 1401可以根据所述用于标识 UE附着的 MME的 MME pool的信息, 确定 UE附着的 MME的 MME pool与切换的 目标接入节点所属的一个或多个 MME pool是否有相同的 MME pool: 若存 在相同的 MME pool, 所述接入节点确定切换类型为 X2切换; 若不存在相 同的 MME pool, 所述接入节点确定切换类型为 SI切换。 确定子单元 1401 可以在存在相同的 MME pool时, 确定 UE附着的 MME没有发生改变, 确 定切换类型为 X2切换,则切换子单元 1402进行 X2切换。确定子单元 1401 在不存在相同的 MME pool时, 确定 UE附着的 MME发生了改变 , 确定切 换类型为 S 1切换, 则切换子单元 1402进行 S1切换。
进一步, 在本实施例中, 获取单元 120还可以获取所述宿主站点通过 所述通信装置 10与所述宿主站点之间 X2接收建立流程或者 eNB配置更新 流程发送的目标接入节点的 MME pool信息, 则确定子单元 1401可以根据 所述用于标识 UE附着的 MME的 MME pool的信息和所述目标接入节点 MME pool信息确定 UE附着的 MME的 MME pool与所述目标接入节点所 属的一个或多个 MME pool是否有相同的 MME pool。
根据本发明实施例提供的通信装置, 可以根据通信装置的宿主站点提 供的用于标识 UE附着的 MME的 MME pool的信息确定 UE所要进行的切 换的切换类型, 进行成功切换。 如图 11所示, 为本发明实施例提供的一种通信系统示意图, 该通信系 统包括如图 10所示的通信装置 10和通信装置 10的宿主站点 20。该通信装 置 10用于接收宿主站点 20发送的用于标识 UE附着的 MME的移动管理实 体池 MME pool的信息, 并根据该用于 UE附着的 MME的 MME pool的信 息进行 UE的切换。 本实施例提供的通信系统中通信装置 10接收宿主节点 20发送的用于标识 UE附着的 MME的 MME pool的信息的方法可以参照本 发明实施例提供的图 3至图 7所示的方法, 通信装置 10进行切换的方法可 以参照本发明实施例图 8所示的方法, 在此不再赘述。
如图 12所示, 本发明提供了另一种通信装置 30, 该通信装置 30可以 包括:
控制单元 320, 用于控制发送单元 340发送信息;
所述发送单元 340与所述控制单元 320相关联, 用于根据所述控制单 元 320 的控制, 向接入节点发送用于标识所述接入节点覆盖下的用户设备 所述通信装置 30为所述接入节点的宿主站点。
在本实施例中, 通信装置 30可以为 eNB, 接入点可以为 RN; 或者通 信装置 30可以为 HeNB GW, 接入点可以为 HeNB。
在本实施例中, 所述发送单元 340向所述接入节点发送所述用于标识 UE附着的 MME的 MME pool的信息用于所述接入节点根据所述用于标识 UE附着的 MME的 MME pool的信息进行 UE的切换。 UE进行切换的方法 可以参照上述图 8所示方法实施例提供的方法。
在本实施例中, 所述发送单元 340 可以通过切换请求消息、 或 MME 状态传输消息或 S1应用协议 S1AP消息将所述用于标识 UE附着的 MME 的 MME pool的信息发送给所述接入节点, 例如, 可以通过如上述图 3、 4 或 5所示的方法实施例发送。 或者, 所述发送单元 340可以通过初始上下 文建立流程中的初始上下文建立请求消息或 S1AP消息将所述用于标识 UE 附着的 MME的 MME pool的信息发送给所述接入节点, 例如,可以通过如 上述图 6或 7所示方法实施例提供的方法进行发送。
在本实施例中 ,所述用于标识 UE附着的 MME的 MME pool的信息可 以为 GUMMEI或者 GU Group ID。
根据本发明实施例提供的通信装置 30,可将用于标识 UE辅助的 MME 的 MME pool信息发送给接入点,以使得接入点可以确定对 UE所要进行切 换的切换类型, 进行成功切换。
如图 13所示, 本发明实施例还提供了另一种通信系统。 该通信系统可 以包括如图 12所示的通信装置 30, 还可以包括附着于该通信装置 30的接 入点 40。 该通信装置 30可以向接入点 40发送用于标识 UE附着的 MME 的移动管理实体池 MME pool的信息,以使得接入点 40可以根据该用于 UE 附着的 MME的 MME pool的信息进行 UE的切换。本实施例提供的通信系 统中通信装置 30向接入点 40发送用于标识 UE附着的 MME的 MME pool 的信息的方法可以参照本发明实施例提供的图 3至图 7任一所示的方法, 接入点 40进行切换的方法可以参照本发明实施例图 8所示的方法, 在此不 再赘述。
通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到本 发明可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通过硬 件, 但艮多情况下前者是更佳的实施方式。 基于这样的理解, 本发明的技 术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体 现出来, 该计算机软件产品存储在一个存储介质中, 包括若干指令用以使 得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备等)执行 本发明各个实施方式所述的方法。
虽然通过参照本发明的某些优选实施方式, 已经对本发明进行了图示 和描述, 但本领域的普通技术人员应该明白, 可以在形式上和细节上对其 作各种改变, 而不偏离本发明的范围。

Claims

权利要求
1、 一种切换方法, 其特征在于, 该方法包括:
接入节点获取该接入节点的宿主站点发送的用于标识所述接入节点覆 盖下的用户设备 UE 附着的移动管理实体 MME 的移动管理实体池 MME pool的信息;
所述接入节点根据所述获取的用于标识 UE附着的 MME的 MME pool 的信息进行 UE的切换。
2、根据权利要求 1所述的方法, 其特征在于, 所述 UE是通过 S1切换 流程进入到所述接入节点的覆盖范围下, 所述接入节点为所述 S1切换流程 中的目的接入节点, 所述宿主站点为所述 S1切换流程中的目的宿主站点; 所述用于标识 UE附着的 MME的 MME pool的信息包含在所述目的宿 主站点发送给所述目的接入节点的切换请求消息或 MME状态传输消息中 或一种 S1应用协议 S1AP消息中, 所述 S1AP消息用于传输所述用于标识 UE附着的 MME的 MME pool的信息。
3、 根据权利要求 1所述的方法, 其特征在于, 所述用于标识 UE附着 的 MME的 MME pool的信息包含在初始上下文建立流程中所述宿主站点发 送给所述接入节点的初始上下文建立请求消息或一种 S1AP 消息中, 所述 S1AP消息用于传输所述用于标识 UE附着的 MME的 MME pool的信息。
4、根据权利要求 1-3任一所述的方法, 其特征在于, 所述用于标识 UE 附着的 MME 的 MME pool 的信息为全球唯一移动管理实体标识符 GUMMEI或者全球唯一组标识符 GU Group ID。
5、 根据权利要求 1所述的方法, 其特征在于, 所述接入节点为中继节 点, 所述宿主节点为演进基站 eNB; 或者,
所述接入节点为家庭演进基站 HeNB,所述宿主节点为家庭演进基站网 关 HeNB GW。
6、 根据权利要求 1所述的方法, 其特征在于, 所述接入节点根据所述 用于标识 UE附着的 MME的 MME pool的信息进行 UE的切换包括:
所述接入节点根据所述用于标识 UE附着的 MME的 MME pool的信息 确定切换类型, 根据确定的切换类型进行切换。
7、 根据权利要求 6所述的方法, 其特征在于, 所述接入节点根据所述 用于标识 UE附着的 MME的 MME pool的信息确定切换类型包括:
所述接入节点根据所述用于标识 UE附着的 MME的 MME pool的信息 和所述进行切换的目标接入节点的 MME pool信息确定切换类型, 所述目 标接入节点的 MME pool信息由所述宿主站点通过所述接入节点与所述宿 主节点之间 X2接口的建立流程, 或者 eNB配置更新流程告知所述接入节 点。
8、 根据权利要求 7所述的方法, 其特征在于, 所述接入节点根据所述 用于标识 UE附着的 MME的 MME pool的信息和所述进行切换的目标接入 节点的 MME pool信息切换类型确定切换类型包括:
所述接入节点根据所述用于标识 UE附着的 MME的 MME pool的信息, 确定 UE附着的 MME的 MME pool与所述目标接入节点所属的一个或多个 MME pool是否有相同的 MME pool: 若存在相同的 MME pool, 所述接入 节点确定切换类型为 X2切换; 若不存在相同的 MME pool, 所述接入节点 确定切换类型为 S1切换。
9、根据权利要求 8所述的方法,其特征在于,若存在相同的 MME pool, 所述接入节点确定切换类型为 X2切换包括:
若存在相同的 MME pool , 确定 UE附着的 MME没有改变, 确定切换 类型为 X2切换;
若不存在相同的 MME pool, 所述接入节点确定切换类型为 S1切换包 括:
若不存在相同的 MME pool, 确定 UE附着的 MME发生了改变, 确定 切换类型为 SI切换。
10、 一种通信装置, 其特征在于, 包括:
获取单元, 用于获取所述通信装置的宿主站点发送的用于标识所述通 信装置覆盖下的用户设备 UE附着的移动管理实体 MME的移动管理实体池 MME pool的信息;
切换单元,用于当所述 UE需要进行切换时,根据所述获取单元获取的 所述用于标识 UE附着的 MME的 MME pool的信息进行 UE的切换。
11、 根据权利要求 10所述的通信装置, 其特征在于, 所述 UE是通过 S1 切换流程进入到所述通信装置的覆盖范围下, 所述通信装置为所述 S1 切换流程中的目的接入节点, 所述宿主站点为所述 S1切换流程中的目的宿 主站点;
所述获取单元用于获取所述目的宿主站点发送的切换请求消息或
MME状态传输消息中或一种 S 1应用协议 S 1 AP消息中, 所述切换请求消 息、 所述 MME状态传输消息和所述 S1AP消息中包含所述用于标识 UE附 着的 MME的 MME pool的信息, 所述 S1AP消息用于传输所述用于标识 UE附着的 MME的 MME pool的信息。
12、 根据权利要求 10所述的通信装置, 其特征在于, 所述获取单元用 于获取所述宿主站点在初始上下文建立请求流程中发送的初始上下文建立 请求消息或一种 S1AP消息中, 所述初始上下文建立请求消息和所述 S1AP 消息中包含所述用于标识 UE附着的 MME的 MME pool的信息 ,所述 S1AP 消息用于传输所述用于标识 UE附着的 MME的 MME pool的信息。
13、根据权利要求 10-12任一所述的通信装置, 其特征在于, 所述切换 单元还包括确定子单元, 用于根据所述用于标识 UE附着的 MME的 MME pool的信息确定切换类型;
所述切换单元还包括切换子单元, 用于根据所述确定子单元确定的切 换类型进行切换。
14、 根据权利要求 13所述的通信装置, 其特征在于, 所述确定子单元 进一步用于根据所述用于标识 UE附着的 MME的 MME pool的信息,确定 UE附着的 MME的 MME pool与切换的目标接入节点所属的一个或多个 MME pool是否有相同的 MME pool: 若存在相同的 MME pool, 所述接入 节点确定切换类型为 X2切换; 若不存在相同的 MME pool, 所述接入节点 确定切换类型为 S1切换。
15、 一种通信系统, 其特征在于, 该通信系统包括如权利要求 10-14 任一所述的通信装置。
16、 一种通信装置, 其特征在于, 包括:
控制单元, 用于控制发送单元发送信息;
所述发送单元与所述控制单元相关联, 用于根据所述控制单元的控制, 向接入节点发送用于标识所述接入节点覆盖下的用户设备 UE 附着的移动 所述通信装置为所述接入节点的宿主站点。
17、 根据权利要求 16所述的通信装置, 其特征在于, 所述发送单元向 所述接入节点发送所述用于标识 UE附着的 MME的 MME pool的信息用于 所述接入节点根据所述用于标识 UE附着的 MME的 MME pool的信息进行 UE的切换。
18、 根据权利要求 16或 17所述的通信装置, 其特征在于, 所述发送 单元进一步用于通过切换请求消息、 或 MME状态传输消息或 S1应用协议 S1AP消息将所述用于标识 UE附着的 MME的 MME pool的信息发送给所 述接入节点。
19、 根据权利要求 16或 17所述的通信装置, 其特征在于, 所述发送 单元进一步用于通过初始上下文建立流程中的初始上下文建立请求消息或 S1AP消息将所述用于标识 UE附着的 MME的 MME pool的信息发送给所 述接入节点。
20、根据权利要求 16-19任一所述的通信装置, 其特征在于, 所述用于 标识 UE附着的 MME的 MME pool的信息为全球唯一移动管理实体标识符 GUMMEI或者全球唯一组标识符 GU Group ID。
21、根据权利要求 16-19任一所述的通信装置, 其特征在于, 所述接入 节点为中继节点, 所述通信装置为演进基站 eNB; 或者,
所述接入节点为家庭演技基站 HeNB,所述通信装置为家庭演进基站网 关 HeNB GW。
22、 一种通信系统, 其特征在于, 该通信系统包括如权利要求 16-21
PCT/CN2011/075168 2010-06-28 2011-06-02 切换方法、通信装置和通信系统 WO2011144145A1 (zh)

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