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WO2012041023A1 - 一种信息传输的方法及接入节点 - Google Patents

一种信息传输的方法及接入节点 Download PDF

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Publication number
WO2012041023A1
WO2012041023A1 PCT/CN2011/070434 CN2011070434W WO2012041023A1 WO 2012041023 A1 WO2012041023 A1 WO 2012041023A1 CN 2011070434 W CN2011070434 W CN 2011070434W WO 2012041023 A1 WO2012041023 A1 WO 2012041023A1
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WO
WIPO (PCT)
Prior art keywords
terminal
access node
mme
information
access
Prior art date
Application number
PCT/CN2011/070434
Other languages
English (en)
French (fr)
Inventor
王昇明
奚进
刘磊
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US13/258,231 priority Critical patent/US8755801B2/en
Priority to EP11801538.7A priority patent/EP2464164B1/en
Publication of WO2012041023A1 publication Critical patent/WO2012041023A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/04Reselecting a cell layer in multi-layered cells
    • 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • H04W36/087Reselecting an access point between radio units of access points
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/02Processing 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
    • H04W8/06Registration at serving network Location Register, VLR or user mobility server
    • H04W8/065Registration at serving network Location Register, VLR or user mobility server involving selection of the user mobility server
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12Access point controller devices

Definitions

  • the present invention relates to a wireless cellular communication system, and more particularly to a method and an access node for information transmission.
  • the wireless communication system is mainly composed of a wireless access network and a core network, and the wireless access network is responsible for providing a wireless connection, so that the terminal is connected to the core network at the first level and one level.
  • the core network also called the backbone network
  • LTE Long Term Evolution
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • EPC Evolved Packet Core
  • a node ie, an evolved Node B (eNodeB, eNB) in an access network is uniformly planned and deployed by an operator.
  • the eNB is directly connected to the core network element, such as the Mobility Management Entity (MME), and establishes an SI interface according to the network deployment.
  • MME Mobility Management Entity
  • the eNB may connect to multiple MMEs and select an appropriate MME for the terminal in the process of accessing or switching for the terminal.
  • MME Mobility Management Entity
  • the dynamic access nodes are often connected to the core network through the upper-level static access nodes to form a hierarchical architecture of the access network.
  • Hierarchical access network systems such as home base station systems and relay system technologies.
  • the home base station is a small, low-power base station deployed in indoor places such as homes and offices. Its main function is to provide users with higher service rates and reduce the cost of using high-speed services, while making up for existing distribution. Insufficient coverage of cellular wireless communication systems.
  • the advantages of home base stations are affordability, convenience, low power output, and plug-and-play.
  • the home base station user accesses the home eNodeB Access Network (Home eNodeB Access Network, HeNB AN) (shown in FIG.
  • HeNB AN is composed of a Home eNodeB (HeNB) and a Home eNodeB Gateway (HeNB GW).
  • HeNB GW Home eNodeB Gateway
  • the main functions performed by the HeNB GW are: processing registration and access control of the home base station, verifying the home base station, and exchanging data of the core network and the home base station.
  • the Home eNodeB Management System (HMS) performs operation and maintenance management on the home base station, and configures and controls the home base station according to the requirements of the operator.
  • the HeNB implements the configuration management function.
  • the configuration management function includes verification of location information and parameter configuration for the HeNB.
  • the parameter configuration is mainly designed to the core network (Core Network, CN) level parameter configuration, the radio access network (RAN) side parameter configuration, and the radio frequency (RF) parameter configuration.
  • the HeNB may also use an architecture that is not directly connected to the MME through the HeNB GW.
  • a relay node (RELAY, or denoted as Relay Node, RN) is a wireless network node that addresses the coverage and capacity issues of a cellular wireless communication system.
  • ReLAY Relay Node
  • RN Relay Node
  • RN deployment can increase data rate coverage, group mobility, temporary network deployment, throughput in cell edge areas, and coverage of new areas.
  • the RN relays data through a wireless link with other network nodes, and its working principle is shown in FIG.
  • the UE in which the base station directly serves is called a Macro (UE) UE, and the UE served by the RELAY is called a RELAY UE.
  • UE Macro
  • the RELAY UE accesses the RELAY through an access link, which relays the data of the RELAY UE on the uplink and downlink through a backhaul link.
  • 3GPP 3rd Generation Partnership Project
  • the Macro eNB that provides the backhaul link for RELAY is called the donor base station (Doror eNB, DeNB) of the RN, and the interface between the RELAY and the DeNB is called the Un interface.
  • An S1 connection is established between the RELAY and the DeNB from the signaling connection, and the DeNB acts as the S1 proxy (SI proxy) of the RELAY, and provides a control plane and a user plane with the core network through the S1 connection between the UE and the core network.
  • Signaling connection (Sl-C, S1-U).
  • RELAY attaches as a UE in the initial process and obtains a packet data network (Packet) Data Network Connection (PDN) connects, and establishes a service layer connection with its Operation Administration and Maintenance (OAM) system on this connection, and downloads configuration parameters.
  • Packet Packet
  • PDN Packet Data Network Connection
  • OAM Operation Administration and Maintenance
  • the HeNB can access the core network through the HeNB GW, and the RELAY accesses the core network through the DeNB.
  • the access node HeNB or RELAY
  • HeNB GW or DeNB the upper access node
  • the terminal access node has only one S1 connection with the upper-level access node, and the upper-level access node connects to different MMEs through multiple S1 connections.
  • the upper-level access node selects an appropriate MME for the terminal.
  • the terminal access node cannot know the information of the MME connected to the terminal.
  • the present invention provides a method for information transmission and an access node, so that the terminal access node learns the information of the MME accessed by the terminal.
  • the present invention provides a method for information transmission, the method comprising: in a terminal initial access process and/or in the terminal handover process, an upper-level access node belonging to a hierarchical access network connects the terminal The information of the incoming mobility management entity (MME) is notified to the terminal access nodes belonging to the hierarchical access network.
  • MME mobility management entity
  • the step of: in the initial access process of the terminal, the step of the upper-layer access node notifying the information of the MME that the terminal accesses to the terminal access node includes: in the initial access process of the terminal, when the upper-level access node receives the After the initial context setup request message sent by the MME accessed by the terminal, the upper-level access node carries the information of the MME in the initial access signaling sent to the terminal access node.
  • the initial access signaling includes one or more of the following: an initial context setup request message, an evolved radio access bearer setup request message, a user context modification request message, and a preset downlink dedicated message.
  • the step of the upper-level access node notifying the information of the MME accessed by the terminal to the terminal access node includes: in the terminal handover process, the upper-level access node receives the access of the terminal After the first handover request message is sent by the MME, the upper-level access node carries the information of the MME in a second handover request message sent to the terminal access node.
  • the method further includes:
  • the terminal access node After receiving the information about the MME sent by the upper-level access node, the terminal access node records the information of the MME accessed by the terminal. The method further includes: when the terminal access node determines that the terminal needs to perform X2 handover, and determines that the X2 handover can be initiated according to the information of the MME accessed by the terminal, sending, to the target access node, The third handover request message carries the information of the MME in the third handover request message.
  • the step of the terminal access node determining that the X2 handover can be initiated according to the information of the MME accessed by the terminal includes: if the terminal access node checks that the information of the MME exists in the target obtained in advance In the MME resource pool information connected to the access node, it is determined that the X2 handover can be initiated.
  • the method further includes: if the target access node belongs to a terminal access node of a hierarchical access network, after the target access node receives the third handover request message, the target access node Sending a path switch message to the upper-level access node that serves the target access node, where the message carries the information of the MME.
  • the information of the MME includes one or more of the following information: an identifier of the MME, a load indication of the MME, and a signaling identifier of the S1 allocated by the MME to the terminal.
  • the terminal access node is a home base station
  • the upper-level access node is a home base station gateway
  • the terminal access node is a relay node
  • the upper-level access node provides the relay node The macro base station of the backhaul link.
  • the present invention further provides an access node, where the access node is an upper-level access node, and the terminal access node accesses the core network by using the upper-level access node, where the upper-level access node
  • the access node is configured to notify the terminal access node of the information of the mobility management entity (MME) accessed by the terminal during the initial access of the terminal and/or the handover process of the terminal.
  • MME mobility management entity
  • the upper access node is configured to notify the terminal access node of the information of the MME accessed by the terminal in the initial access process of the terminal as follows:
  • the initial access signaling sent to the terminal access node carries the information of the MME, where the initial access signaling includes the following message.
  • the upper access node is configured to notify the terminal access node of the information of the MME accessed by the terminal in the terminal handover process as follows: In the terminal handover process, the terminal access is received. After the first handover request message sent by the MME, the information about the MME is carried in the second handover request message sent to the terminal access node.
  • the information of the MME includes one or more of the following information: an identifier of the MME, a load indication of the MME, and a signaling identifier of the S1 allocated by the MME to the terminal.
  • the terminal access node is a home base station, the upper-level access node is a home base station gateway; or the terminal access node is a relay node, and the upper-level access node provides the relay node The macro base station of the backhaul link.
  • the method for transmitting information and the access node provided by the present invention enable the terminal access node to learn the information of the MME accessed by the terminal, so that the terminal access node can perform X2 through the acquired information of the MME. Switch.
  • FIG. 1 is a network architecture diagram of an E-UTRAN of an LTE access network
  • 2 is a structural diagram of a HeNB network
  • FIG. 3 is a structural diagram of a wireless relay node network
  • FIG. 4 is a flowchart of acquiring MME information according to Embodiment 1 of the present invention
  • FIG. 6 is a flowchart of acquiring MME information and performing X2 handover according to Embodiment 3 of the present invention.
  • a preferred embodiment of the present invention provides a method for obtaining MME information accessed by a terminal, which mainly relates to a QoS information in a hierarchical access network, where the terminal access node obtains MME information connected by the terminal under its jurisdiction.
  • the core idea of the method is: the upper-level access node notifies the terminal access node of the MME node information accessed by the terminal.
  • the present invention will be described in more detail below using the embodiments. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.
  • the "MME information" in the embodiment includes at least one of the following:
  • the first embodiment and the second embodiment provide two methods for the terminal access node to obtain the "MME information" of the terminal accessed by the terminal, and the third embodiment describes how the terminal access node uses the obtained "MME information".
  • Embodiment 1 This embodiment describes a process in which an upper-level access node notifies a terminal accessing "MME information" to a terminal access node when the terminal first accesses the network, such as when the terminal initially accesses the network, such as As shown in FIG. 4, the specific process is described as follows: Step 101: The terminal establishes radio resource control with the terminal access node (Radio Resource). Control, RRC) protocol connection. If the terminal has previously registered to a certain MME, the terminal notifies the MME (registered MME) identifier to the terminal access node in the RRC signaling setup message (RRC Connection Setup Complete). Step 102: The terminal access node sends an initial UE message to the upper-level access node (INITIAL UE)
  • Step 103 The upper-level access node selects an appropriate port for the terminal to access.
  • the selection principle is the same as the prior art: if the superior access node is connected to the previously registered terminal of the terminal, the priority is selected; if the superior node is not connected to the previously registered terminal of the terminal, or the terminal does not provide the previously registered identifier Then, the upper-level access node selects ⁇ according to the principle of load sharing.
  • Step 104 The upper-level access node sends an initial UE message (INITIAL UE MESSAGE) to the selected MME.
  • Step 105 After receiving the initial UE message (INITIAL UE MESSAGE), the MME sends an initial context establishment request (INITIAL CONTEXT SETUP REQUEST) message to the upper access node if the UE is allowed to access.
  • the initial access signaling may include: initial context establishment. Request ( INITIAL CONTEXT
  • E-RAB Evolved-Radio Access Bearer
  • E-RAB SETUP REQUEST message or UE CONTEXT MODIFICATION REQUEST The message or the preset downlink dedicated message informs the terminal access node of the "MME information" selected by the terminal in step 103.
  • Step 107 After receiving the message sent in step 106, the terminal access node records the "MME information" of the terminal, and returns an appropriate response message to the MME through the upper-level access node (eg, It may be an INITIAL CONTEXT SETUP RESPONSE message, an E-RAB SETUP RESPONSE message or a UE CONTEXT MODIFICATION RESPONSE message, completing the signaling procedure.
  • the terminal access node obtains the real access of the terminal through the initial access is completed, and the information required for the node selection is provided for the subsequent ⁇ 2 handover.
  • Embodiment 2 This embodiment describes that after the terminal accesses the network through the source access node, the terminal enters a target terminal access node by switching. When the terminal is switched, the upper-level access node notifies the processing information of the access information of the terminal to the target terminal access node. As shown in FIG. 5, the invention focuses on steps 203 and 204. The process is described as follows: Step 201: The terminal establishes an RRC connection with the source access node. The source access node selects an appropriate port for the terminal to access, and the steps here are the same as steps 101 to 103 of Embodiment 1. The terminal initiates the service through the source access node and enters the connected state.
  • the source access node determines that the terminal needs to be handed over to the target terminal access node through the measurement report of the terminal due to the terminal mobile or the wireless signal of the cell where the terminal is located.
  • the built community The source access node of the terminal sends a Handover Required message to the UI.
  • Step 202 The source MME determines that the signaling needs to be forwarded to the service by using the information in the target ID of the target access node carried in the message.
  • the target MME may select a new MME connected to the target upper-level access node according to the load and geographical deployment of the MME, and forward the handover request message and the context of the terminal to the MME.
  • the target MME After receiving the handover request message, the target MME determines that the signaling needs to be forwarded to the target upper-level access node by using the information in the target ID of the target access node, and sends a handover request to the upper-level access node.
  • (Handover Request) message After receiving the handover request message from the target MME, the upper-level access node constructs a handover request message, adds a target "MME information" of the terminal access in the message, and then sends the target to the target end Level access node.
  • the target terminal access node After receiving the handover request message, the target terminal access node records the "MME information" accessed by the terminal, and feeds back the handover request response to the target MME through the upper-level access node.
  • Step 205 After receiving the handover request response message, the MME sends a Handover Command message to the source access node.
  • the source access node in this embodiment may be a terminal access node connected to the MME through the upper-level access node in the "hierarchy structure" mentioned in the background, or may be directly connected to the MME in the "flat structure". Access node.
  • the terminal access node obtains the "MME information" accessed by the terminal through the handover procedure, and provides the information required for the corresponding node selection for the subsequent X2 handover.
  • the MME that needs to maintain the service to perform the handover terminal does not change.
  • the target base station needs to know the MME that the terminal accesses at the source base station, and continues to execute the dedicated S1 process of the terminal through the MME.
  • the source base station notifies the target global base station of the globally unique MME identifier (GUMMEI) of the terminal, and the target base station completes the determination of the MME according to the GUMMEI.
  • GUMMEI globally unique MME identifier
  • the terminal access node does not know the MME accessed by the terminal, and cannot notify the target base station of the information, thereby causing the X2 handover to fail. Therefore, according to the present invention, the terminal access node can acquire the information of the MME accessed by the terminal, and can perform X2 handover by using the acquired information of the MME.
  • Embodiment 3 This embodiment describes how the terminal access node obtains and uses the information in the X2 handover process after acquiring the information of the MME accessed by the terminal.
  • an X2 direct interface is established between the source terminal access node and the target access node, and the source terminal access node is connected to the MME through the upper-level access node.
  • Step 301 The source terminal access node accesses the core network through the upper-level access node, and the source terminal access node registers with the upper-level access node (SI Setup The upper-level access node notifies the terminal access node of the MME resource pool information to which it is connected.
  • the source terminal access node establishes an X2 interface with the target access node according to the configuration.
  • the source terminal access node and the target access node exchange the MME resource pool information connected to each other.
  • the terminal accesses the source terminal access node, and the source terminal access node maintains the "MME information" accessed by the terminal.
  • Step 302 The source terminal access node determines that the terminal needs to be handed over to the cell established by the target access node by using the terminal's measurement report, etc., due to the terminal mobile or the wireless signal of the cell where the terminal is located.
  • the ingress node compares with the "MME information" accessed by the terminal obtained in step 301 according to the MME resource pool connected to the target access node obtained in step 301, if the MME accessed by the terminal exists in the target access node In the MME resource pool, it is determined that an X2 handover can be initiated. Then, the source terminal access node sends a Handover Request message to the target access node, where the message carries the "MME information" accessed by the terminal. Step 303: After receiving the handover request message, the target access node sends a handover request response message to the source terminal access node to complete the handover preparation process.
  • Step 304 After the terminal switches to the target access node, the target access node proceeds to the step The MME that the terminal refers to in the handover request of 302 sends a Path Switch Request message to update the user plane connection. If the target access node accesses the core network through the upper-level access node, the target access node sends a path switch message to the upper-level access node that serves the access node, where the message carries the "MME" accessed by the terminal. After receiving the path switching request message, the upper-level access node selects the MME according to the "MME information" therein, and sends a path switching request message to the selected MME;
  • Step 305 After receiving the path switching request message, the MME sends a Path Switch Acknowledge message to the target access node or to the target access node through the upper access node.
  • the embodiment further provides an access node, where the access node is a superior access node, and the terminal access node accesses the core network by using the upper access node, where the upper access node is set to : during initial access of the terminal and/or during handover of the terminal, Notifying the terminal access node of the information of the mobility management entity (MME) accessed by the terminal.
  • MME mobility management entity
  • the upper access node is configured to notify the terminal access node of the information of the MME accessed by the terminal in the initial access process of the terminal as follows:
  • the initial access signaling sent to the terminal access node carries the information of the MME, where the initial access signaling includes the following message.
  • the upper access node is configured to notify the terminal access node of the information of the MME accessed by the terminal in the terminal handover process as follows: In the terminal handover process, the terminal access is received. After the first handover request message sent by the MME, the information about the MME is carried in the second handover request message sent to the terminal access node.
  • the information of the MME includes one or more of the following information: an identifier of the MME, a load indication of the MME, and a signaling identifier of the S1 allocated by the MME to the terminal.
  • the terminal access node is a home base station
  • the upper access node is a home base station gateway; or
  • the terminal access node is a relay node, and the upper-level access node provides a macro base station of the backhaul link for the relay node.
  • the embodiment further provides a system for information transmission, the system comprising: an upper access node and a terminal access node, wherein the terminal access node accesses the core network through the upper access node, where The upper-level access node is configured to: notify the terminal access node of the information of the MME accessed by the terminal in the initial access of the terminal and/or the handover process of the terminal.
  • the upper-level access node is configured to notify the terminal access node of the information of the MME accessed by the terminal in the initial access process of the terminal in the following manner: during the initial access process of the terminal, when receiving After the initial context setup request message sent by the MME accessed by the terminal, the initial access signaling sent to the terminal access node carries the information of the MME,
  • the initial access signaling includes: an initial context setup request message, an evolved radio access bearer setup request message, a UE context modification request message, or a preset downlink dedicated message.
  • the upper-level access node is configured to notify the terminal access node of the information of the MME accessed by the terminal in the terminal handover process as follows: In the terminal handover process, receiving the terminal After the first handover request message sent by the MME, the information about the MME is carried in the second handover request message sent to the terminal access node. among them,
  • the terminal access node is configured to: after receiving the MME information accessed by the terminal, record the information of the MME accessed by the terminal, and determine that the terminal needs to perform X2 handover, and according to the terminal When the information of the incoming MME determines that the X2 handover can be initiated, the third handover request message is sent to the target access node, and the information of the MME is carried. among them,
  • the terminal access node is configured to determine that the X2 handover can be initiated according to the following manner: if the information of the MME is found to exist in the MME resource pool information that is connected to the target access node that is obtained in advance, the judgment may be initiated. X2 switch. If the target access node belongs to the terminal access node of the hierarchical access network, the target access node is configured to: after receiving the third handover request message, serve the target access node The superior access node sends a path switch message carrying the information of the MME.
  • the information of the MME includes one or more of the following information: an identifier of the MME,
  • the load indication of the MME and the signaling identifier of the S1 allocated by the MME to the terminal among them,
  • the terminal access node is a home base station, and the upper access node is a home base station gateway; or the terminal access node is a relay node, and the upper access node provides a backhaul chain for the relay node.
  • Road macro base station One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
  • the present invention enables the terminal access node to learn the information of the MME accessed by the terminal, so that the terminal access node can perform X2 handover through the acquired information of the MME.

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

Description

一种信息传输的方法及接入节点
技术领域 本发明涉及无线蜂窝通信系统, 更具体地说, 涉及一种信息传输的方法 及接入节点。
背景技术
无线通讯系统主要由无线接入网和核心网共同组成, 无线接入网负责提 供无线连接, 使终端一级一级的汇接到核心网中。 而核心网(也叫骨干网) 将 业务提供者与接入网, 及接入网与其他接入网连接在一起, 对终端的业务接 续、 计费、 以及移动性等方面进行统一管理。 例如, 长期演进(Long Term Evolution , LTE ) 系统由演进的通用陆基无线接入网 ( Evolved Universal Terrestrial Radio Access Network, E-UTRAN )与演进的分组核心网( Evolved Packet Core, EPC )共同组成, 参见图 1。 在传统的 LTE系统中, 接入网中 的节点 (i.e.演进型节点 B ( eNodeB, eNB ) ) 由运营商统一的规划和部署。 eNB 根据网络部署直接与核心网网元如移动性管理实体 ( Mobility Management Entity, MME )相连并建立 SI接口。 eNB可以连接至多个 MME, 并在为终端进行接入或切换的流程中为该终端选择适合的 MME。 然而, 随着无线技术的不断演进, 越来越多的技术场景要求接入网节点 是动态部署的, 在部分场景下节点甚至是由用户自己进行部署。 为了对动态 部署的接入节点加以控制, 往往会将动态接入节点通过上级静态接入节点连 入核心网, 形成一种接入网的层次结构 (hierarchical architecture ) 。 层次结 构的接入网系统, 例如, 家庭基站系统和中继系统技术。 家庭基站是一种小型、低功率的基站,部署在家庭及办公室等室内场所, 主要作用是为了给用户提供更高的业务速率, 并降低使用高速率服务所需要 的费用, 同时弥补已有分布式蜂窝无线通信系统覆盖的不足。 家庭基站的优 点是实惠、 便捷、 低功率输出、 以及即插即用等。 家庭基站用户是通过家庭基站接入网 ( Home eNodeB Access Network, HeNB AN ) (如图 2所示)连接到核心网网络的, 其中 HeNB AN由家庭基 站( Home eNodeB, HeNB )和家庭基站网关( Home eNodeB Gateway, HeNB GW )共同组成。 HeNB GW主要执行的功能为: 处理家庭基站的注册和接入 控制, 对家庭基站进行验证, 负责交换核心网和家庭基站的数据。 另外, 家 庭基站管理系统( Home eNodeB Management System, HeMS )对家庭基站进 行运行维护管理, 根据运营商要求配置和控制家庭基站, 最主要为 HeNB实 现配置管理功能。 其中, 配置管理功能包括位置信息的核实、 以及为 HeNB 进行参数配置。 参数配置主要设计到核心网 (Core Network, CN )级别的参 数配置、 无线接入网 ( Radio Access Network, RAN )侧的参数配置以及射频 ( Radio Frequency, RF )的参数配置。 另夕卜, HeNB还可以釆用不通过 HeNB GW而和 MME直接连接的架构。 中继节点 (RELAY, 或表示为 Relay Node, RN )是一种解决蜂窝无线 通讯系统的覆盖和容量问题的无线网络节点。 在蜂窝无线通讯系统中, 固定 基站网络的无线覆盖由于各种各样的原因受到限制, 比如各种建筑结构对无 线信号的阻挡等原因造成在无线网络的覆盖中无可避免的存在覆盖漏洞。 另 外一方面在小区的边缘地区, 由于无线信号强度的减弱, 以及相邻小区的干 扰, 导致 UE在小区边缘时, 通讯质量较差, 无线传输的错误率抬高。 RN的 部署可以提高数据率的覆盖率, 群组移动性, 临时网络部署, 小区边缘地区 的吞吐量以及新区域的覆盖。 RN通过与其他网络节点之间的无线链路中继 数据, 其工作原理如图 3所示。 其中基站直接服务的 UE 叫宏(Macro ) UE, RELAY服务的 UE叫 RELAY UE。 RELAY UE通过接入链路 ( access link ) 接入 RELAY, 后者通过回程链路 ( backhaul link )将 RELAY UE的数据在上 行链路和下行链路上进行中继。 目前第三代合作伙伴计划 ( 3rd Generation Partnership Project, 3 GPP )标准组织讨论的 RELAY具备宏基站 ( Macro eNB ) 的所有功能,并能独立建立小区。为 RELAY提供 backhaul link的 Macro eNB 称为该 RN的宿主基站( Donor eNB, DeNB ) , RELAY与 DeNB之间的接 口称为 Un接口。 从信令连接上 RELAY与 DeNB之间建立 S1连接, DeNB 作为 RELAY的 S1 代理( SI proxy ) , 并通过自己与核心网之间的 S1连接 为 RELAY提供与核心网之间的控制面及用户面信令连接(Sl-C, S1-U ) 。 RELAY在初始过程中以 UE的身份附着( Attach )并获得包数据网络( Packet Data Network Connection, PDN )连接, 并在此连接之上与自身的操作管理维 护 ( Operation Administration and Maintenance , OAM ) 系统建立业务层连接, 并下载配置参数。 由上述对家庭基站及中继节点技术描写可见, HeNB可通过 HeNB GW 接入核心网, RELAY通过 DeNB接入核心网。 在这种层次结构下, 终级接 入节点 ( HeNB或 RELAY )与上级接入节点 ( HeNB GW或 DeNB )之间存 在着通常存在于接入网与核心网之间的信令连接 ( i.e. SI连接) 。 其中, 终 级接入节点只与上级接入节点之间存在一个 S1 连接, 而上级接入节点会通 过多个 S 1连接至不同的 MME相连。 当终级接入节点接入用户终端时, 由上 级接入节点为该终端选择合适的 MME。 而终级接入节点无法获知终端连入 的 MME的信息。
发明内容 正^^于以上的问题, 本发明提出了一种信息传输的方法及接入节点, 使终级接入节点获知终端接入的 MME的信息。 为了解决上述问题, 本发明提供一种信息传输的方法, 该方法包括: 在终端初始接入过程中和 /或所述终端切换过程中,属于层次结构接入网 的上级接入节点将终端接入的移动性管理实体(MME )的信息通知同属于层 次结构接入网的终级接入节点。 其中: 在终端初始接入过程中, 上级接入节点将终端接入的 MME的信 息通知终级接入节点的步骤包括: 在终端初始接入过程中, 当所述上级接入节点接收到所述终端所接入的 MME发送的初始上下文建立请求消息后, 所述上级接入节点在向所述终级 接入节点发送的初始接入信令中携带所述 MME的信息。 其中: 所述初始接入信令包括以下消息中的一种或多种: 初始上下文建 立请求消息、 演进的无线接入承载建立请求消息、 用户上下文修改请求消息 和预设的下行专用消息。 其中: 在终端切换过程中, 上级接入节点将终端接入的 MME的信息通 知终级接入节点的步骤包括: 在终端切换过程中, 所述上级接入节点接收到所述终端所接入的 MME 发送的第一切换请求消息后, 所述上级接入节点在向所述终级接入节点发送 的第二切换请求消息中携带所述 MME的信息。 所述方法还包括:
所述终级接入节点接收到所述上级接入节点发送的所述 MME 的信息 后, 记录所述终端接入的 MME的信息。 所述方法还包括: 当所述终级接入节点判断需要对所述终端进行 X2切换, 并且根据所述 终端接入的 MME的信息判断可发起 X2切换时, 向所述目标接入节点发送 第三切换请求消息, 在所述第三切换请求消息中携带所述 MME的信息。 其中: 所述终级接入节点根据所述终端接入的 MME的信息判断可发起 X2切换的步骤包括:若所述终级接入节点检查所述 MME的信息存在于预先 获得的所述目标接入节点所连接的 MME 资源池信息中, 则判断可发起 X2 切换。 所述方法还包括: 若所述目标接入节点属于层次结构接入网的终级接入节点, 则所述目标 接入节点接收到所述第三切换请求消息后, 所述目标接入节点向为本目标接 入节点服务的上级接入节点发送路径转换消息, 消息中携带所述 MME的信 息。 其中: 所述 MME的信息包括以下信息中的一种或多种: MME的标识、 MME的负荷指示、 MME为所述终端分配的 S1的信令标识。 其中: 所述终级接入节点为家庭基站, 所述上级接入节点为家庭基站网 关; 或 所述终级接入节点为中继节点, 所述上级接入节点为所述中继节点提供 回程链路的宏基站。 为了解决上述问题, 本发明还提供一种接入节点, 所述接入节点为上级 终级接入节点, 终级接入节点通过所述上级接入节点接入核心网, 其中, 所述上级接入节点设置为: 在终端初始接入和 /或所述终端切换过程中, 将终端接入的移动性管理实体(MME ) 的信息通知所述终级接入节点。 其中: 所述上级接入节点是设置为按如下方式在终端初始接入过程中, 将终端接入的 MME的信息通知终级接入节点: 在终端初始接入过程中, 当 接收到所述终端所接入的 MME发来的初始上下文建立请求消息后, 向所述 终级接入节点发送的初始接入信令中携带所述 MME的信息, 所述初始接入信令包括以下消息中的一种或多种: 初始上下文建立请求 消息、 演进的无线接入承载建立请求消息、 用户上下文修改请求消息和预设 的下行专用消息。
其中: 所述上级接入节点是设置为按如下方式在终端切换过程中, 将终 端接入的 MME的信息通知终级接入节点: 在终端切换过程中, 接收到所述 终端所接入的 MME发送的第一切换请求消息后, 在向所述终级接入节点发 送的第二切换请求消息中携带所述 MME的信息。 其中: 所述 MME的信息包括以下信息中的一种或多种: MME的标识、 MME的负荷指示、 MME为所述终端分配的 S1的信令标识。 其中: 所述终级接入节点为家庭基站, 所述上级接入节点为家庭基站网 关; 或 所述终级接入节点为中继节点, 所述上级接入节点为所述中继节点提供 回程链路的宏基站。 综上, 本发明提出的一种信息传输的方法及接入节点, 可使终级接入节 点获知终端接入的 MME的信息, 使终级接入节点可以通过所获取的 MME 的信息进行 X2切换。
附图概述 图 1是 LTE接入网 E-UTRAN网络架构图; 图 2是 HeNB网络的结构图; 图 3是无线中继节点网络的架构图; 图 4是本发明实施例一的获取 MME信息的流程图; 图 5是本发明实施例二的获取 MME信息的流程图; 图 6是本发明实施例三的获取 MME信息及进行 X2切换的流程图。
本发明的较佳实施方式 本发明提出的一种获取终端所接入 MME信息的方法, 主要是涉及在层 次结构的接入网中,终级接入节点获取其所辖终端连接的 MME信息的方法, 其核心思想是: 由上级接入节点将终端接入的 MME节点信息通知终级接入 节点。 为了使本发明的描述更加明确, 下面将使用实施例对本发明进行更详细 的描述。 需要说明的是, 在不冲突的情况下, 本申请中的实施例及实施例中 的特征可以相互任意组合。 实施例中的 "MME信息 " 包括下列各项至少之一: MME的标识(包括
MME码、 MME所在的分组标识, 以及 MME所在的公众陆地移动电话网 ( Public Land Mobile Network, PLMN )标识); 该 MME的负荷指示; MME 为该终端分配的 S1 的信令标识。 实施例一和实施例二提供了两种终级接入 节点获取其所辖终端接入的 "MME信息" 的方法, 实施例三描述了终级接 入节点如何使用获取的 "MME信息" 。
实施例一 本实施例描述的是终端初始接入到网络后, 在终端首次上下文建立的时 候, 上级接入节点将终端接入的 "MME信息" 通知到终级接入节点的处理 流程, 如图 4所示, 其具体流程描述如下: 步骤 101 : 终端与终级接入节点建立无线资源控制 (Radio Resource Control, RRC )协议连接。 如果该终端此前曾注册到某个 MME, 则终端在 RRC信令消息( RRC连 接建立完成( RRC Connection Setup Complete ) )中将该 MME (注册的 MME ( registered MME ) )标识通知终级接入节点; 步骤 102:终级接入节点向上级接入节点发送初始 UE消息( INITIAL UE
MESSAGE ) , 如果终级接入节点在步骤 101中获得了终端此前注册的 ΜΜΕ 标识, 则在该消息中将该 ΜΜΕ标识通知上级接入节点。 步骤 103: 上级接入节点为该终端选择合适的 ΜΜΕ进行接入。 选择原则与现有技术相同: 如果上级接入节点与终端此前注册的 ΜΜΕ 有连接, 则优先选择此 ΜΜΕ; 如果上级节点与终端此前注册的 ΜΜΕ没有 连接, 或终端没有提供此前注册的 ΜΜΕ的标识, 则上级接入节点根据负荷 分担的原则选择 ΜΜΕ。 步骤 104: 上级接入节点将初始 UE消息 ( INITIAL UE MESSAGE )发 送到选择后的 MME。 步骤 105: MME在收到初始 UE消息 ( INITIAL UE MESSAGE )后, 如果允许 UE接入, 则向上级接入节点发送初始上下文建立请求(INITIAL CONTEXT SETUP REQUEST ) 消息。 步骤 106: 上级接入节点向所述终级接入节点发送初始接入信令, 在该 初始接入信令中携带所述 MME的信息; 所述初始接入信令可以包括:初始上下文建立请求( INITIAL CONTEXT
SETUP REQUEST ) 消息或下行专用消息 ( e.g.演进的无线接入承载 ( Evolved-Radio Access Bearer , E-RAB ) ) 建立请求 ( E-RAB SETUP REQUEST ) 消息或 UE上下文爹改请求(UE CONTEXT MODIFICATION REQUEST )消息 )或预设的下行专用消息, 将其在步骤 103中为终端选择的 "MME信息" 通知终级接入节点。 步骤 107: 终级接入节点在收到步骤 106中发送的消息后, 记录该终端 的 "MME信息" , 并通过上级接入节点向 MME返回适当的响应消息 (如 可以是初始上下文建立响应( INITIAL CONTEXT SETUP RESPONSE )消息, E-RAB建立响应 ( E-RAB SETUP RESPONSE ) 消息或用户上下文爹改响应 ( UE CONTEXT MODIFICATION RESPONSE ) 消息) , 完成信令流程。 通过上述流程, 完成了终级接入节点通过初始接入获取终端真实接入的 ΜΜΕ的信息, 为后续的 Χ2切换提供了相应的节点选择所需的信息。
实施例二: 本实施例描述的是终端通过源接入节点接入到网络后, 通过 切换进入一个目标终级接入节点。 在终端发生切换的时候, 由上级接入节点 将终端接入的 "ΜΜΕ信息" 通知到目标终级接入节点的处理流程, 如图 5 所示, 发明点侧重于步骤 203 , 204, 其具体流程描述如下: 步骤 201 : 终端与源接入节点建立 RRC连接。 源接入节点为该终端选择 合适的 ΜΜΕ进行接入, 此处步骤与实施例 1的步骤 101到 103相同。 终端 通过源接入节点发起业务并进入连接态, 由于终端移动或终端所处小区的无 线信号变化等原因, 源接入节点通过终端的测量报告, 判断需要将终端切换 到目标终级接入节点所建小区。 终端的源接入节点向 ΜΜΕ发送切换要求 ( Handover Required ) 消息; 步骤 202: 源 MME通过消息中携带的目标终级接入节点的标识 ( Target ID ) 中的信息判断需要将信令转发给服务于目标终级节点的目标上级接入节 点, 根据 MME的负荷和地理部署, 源 MME可能会选择新的与目标上级接 入节点相连的 MME, 并向其转发切换要求消息, 以及终端的上下文。 目标 MME 收到切换要求消息后, 通过消息中携带的目标终级接入节点的标识 ( Target ID ) 中的信息判断需要将信令转发目标上级接入节点, 并向上级接 入节点发送切换请求( Handover Request ) 消息; 步骤 203: 上级接入节点在收到来自目标 MME的切换请求消息后, 构 造切换请求消息, 在该消息中增加终端接入的目标 "MME信息" , 然后发 送给目标终级接入节点。 步骤 204: 目标终级接入节点在收到切换请求消息后, 记录该终端接入 的 "MME 信息", 并通过上级接入节点向目标 MME 反馈切换请求响应 ( Handover Request Acknowledge ) 消息; 步骤 205: MME在接收到切换请求响应消息后, 向源接入节点发送切 换命令 ( Handover Command ) 消息。 本实施例中的源接入节点可以是背景中提到的 "层次结构" 中的通过上 级接入节点连接到 MME的终级接入节点, 也可以是 "扁平结构" 中的直接 连接到 MME的接入节点。 通过上述流程, 完成了终级接入节点通过切换流程获取终端接入的 "MME信息", 为后续的 X2切换提供了相应的节点选择所需的信息。 在 X2切换过程中, 需要保持服务的以进行切换终端的 MME不发生变 化。 那么, 目标基站收到切换请求后需要知道终端在源基站所接入的 MME, 并继续通过该 MME执行该终端的专用 S1流程。现有技术是源基站将终端的 全球唯一 MME标识( Globally Unique MME Identifier, GUMMEI )通知到目 标基站, 目标基站根据 GUMMEI来完成对 MME的确定的。 但是在层次结 构的接入网系统中, 终级接入节点不知道终端接入的 MME, 也无法通知目 标基站该信息, 从而导致 X2切换无法进行。 因此, 根据本发明, 终级接入 节点可以获取终端所接入 MME的信息, 并且可以通过所获取的 MME的信 息进行 X2切换。
实施例三: 本实施例描述的是终级接入节点获取终端所接入 MME的信 息后, 如何在 X2切换过程中传递并使用该信息。 为了描述的方便, 我们约 定源终级接入节点和目标接入节点之间建立了 X2直接接口, 且源终级接入 节点通过上级接入节点和 MME相连。 如图 6所示, 其具体流程描述如下: 步骤 301 : 源终级接入节点通过上级接入节点接入核心网, 在源终级接 入节点与上级接入节点注册的过程中 (SI Setup ) , 上级接入节点将其所连 接的 MME资源池信息通知终级接入节点。 源终级接入节点根据配置与目标 接入节点建立了 X2接口。在 X2接口建立( X2 Setup )及 eNB构造更新 (eNB Configuration Update)的过程中, 源终级接入节点和目标接入节点交换了彼此 所连接的 MME资源池信息。 通过实施例 1或者实施例 2所描述的方法, 终端接入源终级接入节点, 并且该源终级接入节点保持该终端所接入的 "MME信息"。 步骤 302: 由于终端移动或终端所处小区的无线信号变化等原因, 源终 级接入节点通过终端的测量报告, 判断需要将终端切换到目标接入节点所建 小区,此时源终级接入节点根据步骤 301中获得的目标接入节点所连接 MME 资源池, 与步骤 301中获得的终端所接入的 "MME信息"进行比较, 如果终 端所接入的 MME存在于目标接入节点的 MME资源池中 ,则判断可发起 X2 切换。 则源终级接入节点向目标接入节点发送切换请求 ( Handover Request ) 消息, 该消息中携带终端接入的 "MME信息"。 步骤 303 : 目标接入节点收到切换请求消息后, 向源终级接入节点发送 切换请求响应消息, 完成切换准备过程; 步骤 304: 终端切换到目标接入节点后, 目标接入节点向步骤 302的切 换请求中所指终端接入的 MME发送路径转换请求( Path Switch Request )消 息用以用户面连接的更新。 如果目标接入节点也是通过上级接入节点接入核心网的, 则目标接入节 点向为本接入节点服务的上级接入节点发送路径转换消息, 该消息中携带终 端所接入的 "MME信息"; 上级接入节点收到路径转换请求消息后, 根据其 中的 "MME信息"对 MME进行选择, 并向选择的 MME发送路径转换请求 消息;
步骤 305: MME在收到路径转换请求消息后, 向目标接入节点或者通 过上级接入节点向目标接入节点发送路径转换请求响应 (Path Switch Acknowledge ) 消息。 通过上面的描述, 完成了直接接口 X2接口的切换。
本实施例还提供了一种接入节点, 所述接入节点为上级接入节点, 终级 接入节点通过所述上级接入节点接入核心网, 其中, 所述上级接入节点设置为: 在终端初始接入和 /或所述终端切换过程中, 将终端接入的移动性管理实体(MME ) 的信息通知所述终级接入节点。 其中: 所述上级接入节点是设置为按如下方式在终端初始接入过程中, 将终端接入的 MME的信息通知终级接入节点: 在终端初始接入过程中, 当 接收到所述终端所接入的 MME发来的初始上下文建立请求消息后, 向所述 终级接入节点发送的初始接入信令中携带所述 MME的信息, 所述初始接入信令包括以下消息中的一种或多种: 初始上下文建立请求 消息、 演进的无线接入承载建立请求消息、 用户上下文修改请求消息和预设 的下行专用消息。
其中: 所述上级接入节点是设置为按如下方式在终端切换过程中, 将终 端接入的 MME的信息通知终级接入节点: 在终端切换过程中, 接收到所述 终端所接入的 MME发送的第一切换请求消息后, 在向所述终级接入节点发 送的第二切换请求消息中携带所述 MME的信息。 其中: 所述 MME的信息包括以下信息中的一种或多种: MME的标识、 MME的负荷指示、 MME为所述终端分配的 S1的信令标识。 其中: 所述终级接入节点为家庭基站, 所述上级接入节点为家庭基站网 关; 或
所述终级接入节点为中继节点, 所述上级接入节点为所述中继节点提供 回程链路的宏基站。
本实施例还提供了一种信息传输的系统, 该系统包括: 上级接入节点和 终级接入节点,所述终级接入节点通过所述上级接入节点接入核心网,其中, 所述上级接入节点设置为: 在终端初始接入和 /或所述终端切换过程中, 将终端接入的 MME的信息通知所述终级接入节点。 其中, 所述上级接入节点是设置为按如下方式在终端初始接入过程中, 将终端接入的 MME的信息通知所述终级接入节点:在终端初始接入过程中, 当接收到所述终端所接入的 MME发来的初始上下文建立请求消息后, 向所 述终级接入节点发送的初始接入信令中携带所述 MME的信息, 所述初始接入信令包括: 初始上下文建立请求消息、 演进的无线接入承 载建立请求消息、 UE上下文修改请求消息或预设的下行专用消息。 其中, 所述上级接入节点是设置为按如下方式在终端切换过程中, 将终 端接入的 MME的信息通知所述终级接入节点: 在终端切换过程中, 接收到 所述终端所接入的 MME发送的第一切换请求消息后, 在向所述终级接入节 点发送的第二切换请求消息中携带所述 MME的信息。 其中,
所述终级接入节点设置为: 接收到所述终端接入的 MME信息后, 记录 所述终端接入的 MME的信息, 当判断需要对所述终端进行 X2切换, 并且 根据所述终端接入的 MME的信息判断可发起 X2切换时, 向所述目标接入 节点发送第三切换请求消息, 携带所述 MME的信息。 其中,
所述终级接入节点是设置为按如下方式判断可发起 X2切换: 若检查所 述 MME的信息存在于预先获得的所述目标接入节点所连接的 MME资源池 信息中, 则判断可发起 X2切换。 其中, 若所述目标接入节点属于层次结构接入网的终级接入节点, 所述目标接入节点设置为: 接收到所述第三切换请求消息之后, 向为本 目标接入节点服务的上级接入节点发送路径转换消息, 携带所述 MME的信 息。 其中, 所述 MME的信息包括以下信息中的一种或多种: MME的标识、
MME的负荷指示、 MME为所述终端分配的 S1的信令标识。 其中,
所述终级接入节点为家庭基站, 所述上级接入节点为家庭基站网关; 或 所述终级接入节点为中继节点, 所述上级接入节点为所述中继节点提供 回程链路的宏基站。 本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
以上仅为本发明的优选实施例, 当然, 本发明还可有其他多种实施例, 在不背离本发明精神及其实质的情况下, 熟悉本领域的技术人员当可根据本 发明作出各种相应的改变和变形, 但这些相应的改变和变形都应属于本发明 所附的权利要求的保护范围。
工业实用性 本发明可使终级接入节点获知终端接入的 MME的信息, 使终级接入节 点可以通过所获取的 MME的信息进行 X2切换。

Claims

权 利 要 求 书
1、 一种信息传输的方法, 该方法包括: 在终端初始接入过程中和 /或所述终端切换过程中,属于层次结构接入网 的上级接入节点将终端接入的移动性管理实体(MME )的信息通知同属于层 次结构接入网的终级接入节点。
2、 如权利要求 1所述的方法, 其中: 在终端初始接入过程中, 上级接入 节点将终端接入的 MME的信息通知终级接入节点的步骤包括: 在终端初始接入过程中, 当所述上级接入节点接收到所述终端所接入的 MME发送的初始上下文建立请求消息后, 所述上级接入节点在向所述终级 接入节点发送的初始接入信令中携带所述 MME的信息。
3、 如权利要求 2所述的方法, 其中:
所述初始接入信令包括以下消息中的一种或多种: 初始上下文建立请求 消息、 演进的无线接入承载建立请求消息、 用户上下文修改请求消息和预设 的下行专用消息。
4、 如权利要求 1所述的方法, 其中: 在终端切换过程中, 上级接入节点 将终端接入的 MME的信息通知终级接入节点的步骤包括: 在终端切换过程中, 所述上级接入节点接收到所述终端所接入的 MME 发送的第一切换请求消息后, 所述上级接入节点在向所述终级接入节点发送 的第二切换请求消息中携带所述 MME的信息。
5、 如权利要求 1或 2或 4所述的方法, 其还包括:
所述终级接入节点接收到所述上级接入节点发送的所述 MME 的信息 后, 记录所述终端接入的 MME的信息。
6、 如权利要求 5所述的方法, 其还包括: 当所述终级接入节点判断需要对所述终端进行 X2切换, 并且根据所述 终端接入的 MME的信息判断可发起 X2切换时, 向所述目标接入节点发送 第三切换请求消息, 在所述第三切换请求消息中携带所述 MME的信息。
7、 如权利要求 6所述的方法, 其中: 所述终级接入节点根据所述终端接入的 MME的信息判断可发起 X2切 换的步骤包括: 若所述终级接入节点检查所述 MME的信息存在于预先获得 的所述目标接入节点所连接的 MME资源池信息中, 则判断可发起 X2切换。
8、 如权利要求 6所述的方法, 其还包括: 若所述目标接入节点属于层次结构接入网的终级接入节点, 则所述目标 接入节点接收到所述第三切换请求消息后, 所述目标接入节点向为本目标接 入节点服务的上级接入节点发送路径转换消息, 消息中携带所述 MME的信 息。
9、 如权利要求 1-4中任一项所述的方法, 其中: 所述 MME的信息包括 以下信息中的一种或多种: MME的标识、 MME的负荷指示、 MME为所述 终端分配的 S1的信令标识。
10、 如权利要求 1所述的方法, 其中:
所述终级接入节点为家庭基站, 所述上级接入节点为家庭基站网关; 或 所述终级接入节点为中继节点, 所述上级接入节点为所述中继节点提供 回程链路的宏基站。
11、 一种接入节点, 其特征在于, 所述接入节点为上级终级接入节点, 终级接入节点通过所述上级接入节点接入核心网, 其中, 所述上级接入节点设置为: 在终端初始接入和 /或所述终端切换过程中, 将终端接入的移动性管理实体(MME ) 的信息通知所述终级接入节点。
12、 如权利要求 11所述的接入节点, 其中:
所述上级接入节点是设置为按如下方式在终端初始接入过程中, 将终端 接入的 MME的信息通知终级接入节点: 在终端初始接入过程中, 当接收到 所述终端所接入的 MME发来的初始上下文建立请求消息后, 向所述终级接 入节点发送的初始接入信令中携带所述 MME的信息, 所述初始接入信令包括以下消息中的一种或多种: 初始上下文建立请求 消息、 演进的无线接入承载建立请求消息、 用户上下文修改请求消息和预设 的下行专用消息。
13、 如权利要求 11所述的接入节点, 其中: 所述上级接入节点是设置为按如下方式在终端切换过程中, 将终端接入 的 MME的信息通知终级接入节点: 在终端切换过程中, 接收到所述终端所 接入的 MME发送的第一切换请求消息后, 在向所述终级接入节点发送的第 二切换请求消息中携带所述 MME的信息。
14、 如权利要求 11-13中任一项所述的接入节点, 其中: 所述 MME的信息包括以下信息中的一种或多种: MME的标识、 MME 的负荷指示、 MME为所述终端分配的 S1的信令标识。
15、 如权利要求 11所述的接入节点, 其中:
所述终级接入节点为家庭基站, 所述上级接入节点为家庭基站网关; 或 所述终级接入节点为中继节点, 所述上级接入节点为所述中继节点提供 回程链路的宏基站。
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