WO2012058980A1 - 一种终端接入的方法及系统 - Google Patents

一种终端接入的方法及系统 Download PDF

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Publication number
WO2012058980A1
WO2012058980A1 PCT/CN2011/079461 CN2011079461W WO2012058980A1 WO 2012058980 A1 WO2012058980 A1 WO 2012058980A1 CN 2011079461 W CN2011079461 W CN 2011079461W WO 2012058980 A1 WO2012058980 A1 WO 2012058980A1
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Prior art keywords
terminal
access
signaling
network element
information
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PCT/CN2011/079461
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English (en)
French (fr)
Inventor
艾建勋
毛磊
邓云
戴谦
许英奇
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中兴通讯股份有限公司
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Publication of WO2012058980A1 publication Critical patent/WO2012058980A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/02Access restriction performed under specific conditions

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and system for terminal access.
  • H2H (Human to Human) communication refers to communication between people. By communicating with the operation of the device, the existing wireless communication technology is developed based on H2H communication. In H2H communication, people use The H2H device, that is, the UE (User Equipment) in the normal sense, implements communication.
  • the narrow definition of M2M (Machine to Machine) is machine-to-machine communication. Broadly defined, it is a networked application and service centered on intelligent interaction of machine terminals. It is based on intelligent machine terminals, using multiple communication methods as access means, providing customers with information solutions to meet customer information needs for monitoring, command and dispatch, data collection and measurement.
  • M2M wireless technology
  • M2M can be widely used in industrial applications, home applications, personal applications, and the like. Industry applications such as: traffic monitoring, warning systems, maritime rescue, vending machines, car payments, etc. Home applications such as: automatic meter reading, temperature control, etc. Personal applications such as: life detection, remote diagnosis, etc.
  • M2M's communication objects are machine-to-machine and human-to-machine.
  • Data communication between one or more machines is defined as MTC (Machine Type Communication), in which case human interaction is less required.
  • MTC Machine Type Communication
  • a machine participating in MTC is defined as an MTC device (MDC).
  • MTC device is a terminal of the MTC user, and can communicate with the MTC device and the MTC server through the PLMN (Public Land Mobile Network).
  • PLMN Public Land Mobile Network
  • MTC devices are numerous, the amount of data transmitted per time is small, the transmission interval is large, and the position is relatively fixed.
  • the widespread application of MTC devices is likely to overload the network, such as when a cell suddenly has a power outage, when the power is restored, many MTCs.
  • the device may attempt to access the network at the same time, which will cause the network to be overloaded.
  • the network side needs to improve the overload control capability.
  • the core network element needs to have a new processing overload capability, such as the MME of the Long Term Evolution (LTE) system.
  • Mobility Management Entity Mobility Management Entity
  • APN Access Point name
  • the MME needs to have the capability of delaying the MTC device registration request, service request (Service Request), and the like.
  • Service Request Service Request
  • the MME has the ability to handle overload, it can ensure that the MTC device does not cause network embarrassment when it accesses the network in a large amount. Therefore, when the MTC device accesses the network, the MTC device needs to be introduced into the MME with processing overload capability to implement overload control.
  • overload control of the LTE system is divided into two levels: overload control of the access network and overload control of the core network; overload control of the access network is only for the load of the eNB, if the access network is not overloaded, the terminal will be The request information is sent to the core network. If the core network is overloaded, the core network rejects the message to the terminal, and the terminal exits the system, and the previously established signaling link is released. The entire process creates a lot of useless signaling and can exacerbate congestion on the core network and waste resources on the access network.
  • the technical problem to be solved by the present invention is to provide a method and system for accessing a terminal, which solves the problem that the overload control in the prior art may cause a lot of useless signaling, and may aggravate the congestion condition of the core network and waste the resources of the access network. .
  • the present invention provides a method for terminal access, including: The access network element obtains the access capability information of the core network element for the terminal;
  • the access network element selects the accessed core network element for the terminal according to the obtained access capability information of the core network element for the terminal.
  • the method has the following characteristics:
  • the access capability information for the terminal includes one or more of the following information: a signaling connection rate that allows access, a number of signaling connections that are allowed to be added, a total amount of signaling allowed to access, and permission The service connection rate of the access, the number of service connections allowed to be added, and the total amount of services allowed to access.
  • the method has the following characteristics:
  • the access capability information is for a specific terminal type or for all terminal types.
  • the method has the following characteristics:
  • the step of the access network element for selecting the core network element to be accessed by the terminal includes: selecting, according to the information about the terminal carried by the terminal when the terminal accesses the network, the terminal to provide the terminal access requirement Core network element;
  • the information of the terminal includes type indication information of the terminal; or the information of the terminal includes type indication information of the terminal, and one or more of the following information: an access level of the terminal.
  • the method has the following characteristics:
  • the step of the access network element acquiring the access capability information of the core network element for the terminal includes: the access network element obtaining the connection of the core network element to the terminal by using the interface signaling to the core network element Capacity information; or,
  • the core network element sends the access capability information of the terminal to the access network element through the interface signaling;
  • the interface signaling is S1 signaling in a Long Term Evolution (LTE) system, or Iu signaling in a Wideband Code Division Multiple Access (WCDMA) system.
  • LTE Long Term Evolution
  • WCDMA Wideband Code Division Multiple Access
  • the SI signaling is: SI establishment response signaling, mobility management entity (MME) configuration update signaling, overload control start signaling, or custom S1 signaling;
  • MME mobility management entity
  • the Iu signaling is: overload control start signaling, information delivery indication, reset signaling, or custom Iu signaling.
  • the method has the following characteristics:
  • the access network element is a base station in an LTE system, or a radio network controller in a WCDMA system;
  • the core network element is an MME in an LTE system, or a Mobile Switching Center (MSC) and/or a General Packet Radio Service Technical Service Support Node (SGSN) in a WCDMA system.
  • MSC Mobile Switching Center
  • SGSN General Packet Radio Service Technical Service Support Node
  • the terminal is one or more of the following types: person to person (H2H) device, machine type communication (MTC) device, relay node.
  • H2H person to person
  • MTC machine type communication
  • relay node relay node
  • the present invention provides a terminal access system, which includes a capability information acquiring unit and a terminal access unit in an access network element, where:
  • the capability information acquiring unit is configured to: obtain access capability information of the core network element for the terminal;
  • the terminal access unit is configured to: when the terminal accesses the network, select, according to the access capability information of the core network element obtained by the capability information acquiring unit, the core network element that is selected for the terminal.
  • the system has the following characteristics:
  • the access capability information for the terminal acquired by the capability information acquiring unit includes one or more of the following information:
  • the signaling connection rate allowed to access the number of signaling connections allowed to be added, the total amount of signaling allowed to access, the service connection rate allowed to access, the number of service connections allowed to be added, and the total amount of services allowed to access. .
  • the system has the following characteristics:
  • the access capability information is for a specific terminal type or for all terminal types.
  • the terminal access unit is configured to: select, according to information about the terminal that is carried by the terminal when the terminal accesses the network, a core network element that can provide terminal access requirements for the terminal;
  • the information of the terminal includes type indication information of the terminal; or the information of the terminal includes type indication information of the terminal, and one or more of the following information: an access level of the terminal.
  • the system further includes a capability information sending unit in the core network element,
  • the capability information acquiring unit is configured to: obtain, by using the interface signaling, the access capability information of the core network element for the terminal to the capability information sending unit;
  • the capability information sending unit is configured to: send the access capability information of the core network element to the terminal through the interface signaling to the capability information acquiring unit;
  • the interface signaling is S1 signaling in an LTE system, or Iu signaling in a WCDMA system.
  • the system has the following characteristics:
  • the S1 signaling is: S1 establishment response signaling, mobility management entity (MME) configuration update signaling, overload control start signaling, or custom S1 signaling;
  • MME mobility management entity
  • the Iu signaling is: overload control start signaling, information delivery indication, reset signaling, or custom Iu signaling.
  • the access network element learns the capability information of the core network element processing the MTC device through the interface signaling, and can select the appropriate core network element for the MTC device when accessing the network, and does not exceed the core.
  • the capacity limit set by the network element can ensure that the network maintains normal operation when a large number of MTC devices access the network, which greatly reduces the possibility of congestion of the core network element.
  • the foregoing solution may be applied to all other terminals, and select a core network element with corresponding processing capability for the terminal according to the access level or priority of the terminal, or the service type or service priority initiated by the terminal.
  • FIG. 1 is a schematic diagram of a network layout of an LTE system according to the prior art
  • FIG. 2 is a schematic flowchart of establishing an S1 interface according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a network layout of a WCDMA system according to the prior art
  • FIG. 4 is a schematic diagram of a terminal access system according to an embodiment of the present invention.
  • the access network element selects a suitable core network for preventing the core network element from being overloaded.
  • the access network element acquires the access capability information of the core network element for the terminal; when the terminal accesses the network, the access network element obtains the access capability information of the core network element according to the obtained core network element, The core network element for access is selected for the terminal.
  • the access capability information for the terminal includes any combination of one or more of the following information:
  • the signaling connection rate allowed to access the number of signaling connections allowed to be added, the total amount of signaling allowed to access, the service connection rate allowed to access, the number of service connections allowed to be added, and the total amount of services allowed to access. .
  • the access capability information may be for a specific terminal type, such as an MTC device, or may be applicable to all terminal types.
  • the access network element is a core network element that is selected by the terminal, and may select a terminal for the terminal according to the information of the terminal that is carried by the terminal when the terminal accesses the network.
  • the network element of the access network obtains the access capability information for the terminal network element by using the interface signaling, or the network element of the core network passes the interface for the access capability information of the terminal. The signaling is sent to the access network element.
  • the interface signaling includes S1 signaling in an LTE system, or Iu signaling in a WCDMA (Wideband Code Division Multiple Access) system.
  • S1 signaling in an LTE system or Iu signaling in a WCDMA (Wideband Code Division Multiple Access) system.
  • WCDMA Wideband Code Division Multiple Access
  • the S1 signaling includes: S1 establishment response signaling, MME configuration update signaling, overload control start (Overload start) signaling, or custom S1 signaling;
  • the Iu signaling includes: Overload start signaling, information delivery indication, reset signaling, or custom Iu signaling.
  • the access network element is a base station in an LTE system, or an RNC in a WCDMA system.
  • Radio Network Control Wireless Network Controller
  • the core network element is an MME in an LTE system, an MSC (Mobile Services Switching Center) and/or a SGSN (Serving GPRS Support Node) in a WCDMA system.
  • MME Mobile Management Entity
  • MSC Mobile Services Switching Center
  • SGSN Serving GPRS Support Node
  • the terminal includes an H2H device, an MTC device, a relay node, or other wireless access device.
  • the type indication information of the terminal refers to indication information of the H2H device, or indication information of the MTC device, or indication information of the relay node, or indication information of other wireless access devices.
  • the network layout of the LTE system is as shown in Figure 1. There is an S1 interface between the base station and the core network element MME, and an X2 interface exists between adjacent base stations.
  • the base station 1 (any base station of the LTE system) is just powered on, from the background.
  • Step 201 The base station 1 sends an SI setup request to the MME1, where the request carries information such as a location area identifier (Track Area Code) and a base station identifier of the cell under the control of the base station;
  • a location area identifier Track Area Code
  • Step 202 The MME1 returns an S1 setup response (SI Setup Response) to the base station 1, where the response includes a Served GUMMEI (Globally Unique MME Identifier) and a relative MME Capacity ( Relative MME Capacity);
  • SI Setup Response S1 setup response
  • GUMMEI Globally Unique MME Identifier
  • Relative MME Capacity Relative MME Capacity
  • the relative MME capability refers to the processing capability of one MME with respect to other MMEs, which can be understood as the load capability information of the MME, and is used for performing load balancing between the MMEs.
  • the newly added cell indicates the access capability information of the MME1 for the terminal
  • the access capability information for the terminal may be: a signaling connection rate for allowing access, a number of signaling connections allowed to be added, The total amount of signaling allowed to access, the rate of service connections allowed to access, the number of service connections allowed to be added, and the total amount of services allowed to access;
  • the base station 1 After receiving the S1 setup response returned by the MME1, the base station 1 learns, according to the obtained access capability information of the MME1, the MME1 has the capability of processing the MTC device, the capability of allowing the MTC device to access, or the overload processing for the MTC device. Capability, which is applied to the selection of the core network element (referred to as MME) when the MTC device accesses the network.
  • the base station 1 also establishes an S1 interface with other MMEs to enable load balancing between MMEs.
  • the MTC device 1 After the base station 1 provides services for the common user equipment and the MTC device under the coverage, the MTC device 1 (here, represented by MD1) needs to access the network, initiate random access in the cell under the jurisdiction of the base station 1, and send an RRC connection to the base station 1.
  • Requesting RRC Connection Request
  • the base station 1 establishes an SRB (Signaling Radio Bearer) for the MD1, and sends an RRC Connection Setup signal to the MD1; after obtaining the parameters configured by the base station 1, the MD1 obtains
  • the base station 1 transmits an RRC Connection Setup Complete signaling, in which non-access stratum signaling (NAS signaling) is carried.
  • NAS signaling non-access stratum signaling
  • the RRC signaling sent by the MD1 to the base station 1 carries the type indication information indicating the MTC device, so as to distinguish the common user equipment, that is, the H2H device, and the MD1 can carry the signaling through the RRC connection request or the RRC connection establishment completion.
  • the MTC device type indication information (such as the identifier information of the MTC device) may further include: the access level information of the MTC device, the priority information of the MTC device, the service type initiated by the MTC device, or the service priority initiated by the MTC device. Information.
  • the base station 1 learns that the MME1 has the capability to process the MTC device and allows the MTC through the establishment process of the S1 interface.
  • the capability of the device to access, or the overload processing capability for the MTC device the base station 1 sends an initial user message (Initial UE Message) to the MME1, and the message carries the NAS signaling sent by the MD1.
  • the MME1 configures the parameters required for establishing the data radio bearer for the MD1, and selects an appropriate user plane gateway for the MD1.
  • the MD1 can communicate with the MTC server or other MTC devices.
  • the base station 1 learns that the MME 1 has the capability of processing the MTC device through the establishment process of the S1 interface, and then can correctly select the MME when the MTC device accesses the network, ensuring that the MTC device can normally start after accessing the network. Communication.
  • the MTC device is directed to the MME capable of handling the MTC device in order to avoid overload caused by a large number of MTC devices accessing the normal MME.
  • the base station 1 learns whether the MME 1 has the capability to process the MTC device through the establishment process of the S1 interface, and the base station 1 can obtain the MME through the MME Configuration Update (MME) sent by the MME after the S1 interface is established. Having the ability to process the MTC device, the base station 1 can also obtain the capability of the MME to process the MTC device by using the overload control start (Overload start) signaling or other S1 signaling after the S1 interface is established. For example, the base station 1 has established an S1 interface with a certain MME (MME2). After that, the MME2 has the capability to process the MTC device.
  • MME MME Configuration Update
  • the MME2 can send the MME configuration update signaling to the base station 1 to indicate that the MME2 has the processing MTC.
  • the capability of the device, the capability of allowing the MTC device to access, or the overload processing capability for the MTC device, after being acquired by the base station 1, is applied to the selection of the core network element when the MTC device accesses the network.
  • the network layout of the WCDMA system is shown in Figure 3.
  • the RNC is connected to the core network element MSC and the SGSN through the Iu interface.
  • the IUR interface is established between the RNCs.
  • the Iub interface is established between the RNC and the base station.
  • the RNC After the RNC access network establishes an Iu interface with the core network, the RNC establishes an Iu interface with multiple MSCs and multiple SGSNs in order to implement network sharing and load balancing.
  • the SGSN1 sends the signaling connection rate of the allowed access, the number of signaling connections allowed to be added, the total amount of signaling allowed to access, and the allowed to the RNC through the Iu interface.
  • SGSN1 can reuse existing Iu interface signaling such as Overload start signaling, Information Transfer Indication, Reset signaling, or use custom Iu signaling. Carrying a cell that characterizes the ability to process MTC devices. After receiving the cell that the SGSN1 has the capability to process the MTC device, the RNC applies it to the selection of the core network element (referred to as the SGSN) when the MTC device accesses the network.
  • Iu interface signaling such as Overload start signaling, Information Transfer Indication, Reset signaling, or use custom Iu signaling.
  • the RNC-administered cell (referring to the cell under the jurisdiction of the RNC-administered base station) initiates random access and sends an RRC connection request to the RNC; the RNC establishes a signaling radio bearer for the MD1 (SRB) And transmitting RRC connection setup signaling to the MD1; after obtaining the parameters configured by the RNC, the MD1 sends an RRC connection setup complete signaling to the RNC.
  • SRB signaling radio bearer for the MD1
  • the RRC signaling sent by the MD1 to the RNC carries the identification information of the MTC device to distinguish the common user equipment, and the MD1 may carry the type indication of the MTC device through the RRC connection request or the RRC connection establishment completion signaling.
  • the information is such as the identification information of the MTC device and the level or priority information of the MTC device.
  • the RNC sends an Initial UE Message to the SGSN1 for the MD1, and the message carries the NAS signaling sent by the MD1. Thereafter, the SGSN1 configures the parameters required for the data radio bearer for the MD1 configuration, and selects a suitable user plane gateway for the MD1. After the radio access bearer is established, the MD1 can communicate with the MTC server or other MTC devices. Selecting the core network element supporting the MTC device for the MD device can avoid the overload problem caused by the access of a large number of MTC devices.
  • the MD1 carries the type indication information indicating the MTC device by using the RRC connection request or the RRC connection setup complete signaling, and the MD1 may also carry the characterization MTC device in the initial direct transmission.
  • the type indication information because the RNC selects the core network element after receiving the initial direct transmission.
  • the SGSN is selected mainly for the RNC. Because the MTC device usually initiates services in the PS domain, the RNC needs to select the SGSN for the MTC. If the MTC device can also initiate the voice service (the service in the CS domain), the RNC needs to select the MSC for the MTC. Before selecting the MSC, the Iu interface needs to obtain the capability information of whether the MSC supports the MTC device.
  • the base station 1 (any one of the LTE system base stations) is powered on, and after obtaining the necessary network parameters from the background operation and control server (OAM), the S1 interface needs to be established with the core network to cover the network.
  • OAM background operation and control server
  • Ordinary user equipment provides services and also services the MTC equipment it covers.
  • the process of establishing an S1 interface is as follows:
  • Step 301 The base station sends an S1 setup request (SI Setup Request) to the MME1, where the request carries information such as a location area identifier (Track Area Code) and a base station identifier of the cell under the control of the base station;
  • SI Setup Request SI Setup Request
  • the request carries information such as a location area identifier (Track Area Code) and a base station identifier of the cell under the control of the base station;
  • Step 302 The MME1 returns an S1 setup response (SI Setup Response) to the base station 1, where the response includes a Served GUMMEI (Globally Unique MME Identifier) and a relative MME Capacity (relative MME Capacity).
  • SI Setup Response S1 setup response
  • GUMMEI Globally Unique MME Identifier
  • relative MME Capacity relative MME Capacity
  • the MME1 returns the SI setup response to the base station 1 to carry the access capability information for the MTC device.
  • the access capability information for the MTC device may be: the signaling connection rate allowed to access, the number of signaling connections allowed to be added, and the allowed access. The total amount of signaling, the rate of service connections allowed to access, the number of service connections allowed to be added, and the total amount of services allowed to access.
  • the base station 1 learns the signaling connection rate required by the MTC device through the RRC establishment process. If the signaling connection rate required by the MTC device exceeds the capability range indicated by the MME1, the base station 1 The MME1 cannot select the MME1 to send the initial user equipment message. If the MME that has the S1 interface with the base station 1 cannot provide the signaling connection rate capability required by the MTC device, the base station 1 will reject the access of the MTC device. If the capability meets the signaling connection rate required by the MTC device, the base station 1 may select the MME1 to send the initial user equipment message, and the MTC device may access the network to perform the service.
  • the MME may send a signaling connection rate for allowing access to the base station, a number of signaling connections allowed to be added, a total amount of signaling allowed to access, and allow access by signaling such as an SI establishment response, an MME configuration update, and an overload control start.
  • the MME can also implement the capability information transmission through customized S1 signaling, such as the service connection rate, the number of service connections that are allowed to be added, and the total amount of services allowed to be accessed.
  • the MME sends the access capability information of the MME for the MTC device to the base station by using the S1 setup response, the MME configuration update, the overload control start, and the like, and the capability information may be: Rate, the number of signaling connections allowed to be added, the total amount of signaling allowed to access, the rate of service connections allowed to access, the number of service connections allowed to be added, and the total amount of traffic allowed to access.
  • the base station After receiving the base station, the base station applies it to the selection of the core network element (referred to as MME) when the MTC device accesses the network.
  • MME core network element
  • the base station learns the signaling connection amount of the signaling connection initiated by the MTC device through the RRC establishment process, if the total number of signaling connections currently connected to the MME by the base station is plus If the number of signaling connections added by the MTC device exceeds the total amount of signaling allowed by the MME, the base station 1 cannot select the MME to send the initial user equipment message; if the total amount of signaling allowed to be accessed is not exceeded, The base station may select the MME to send an initial user equipment message, and the MTC device may access the network to perform services.
  • the base station learns the access capability information of the MME for the MTC device by using the S1 signaling, and the base station can also learn the access capability information of the MME for the MTC device through the background operation and the management server, and after the base station learns the capability information of the MME, It is applied to the MME selection when the MTC device accesses the network.
  • the present invention is not limited to an MTC device, and can be extended to a core network when all types of terminals access the network.
  • the selection process of the yuan can also be an H2H device, medium Following the node, or other wireless access device.
  • the base station or the RNC learns the access capability information of the core network element for various terminals through the interface signaling, and then applies it to the selection of the core network element when the terminal accesses the network.
  • the existing access network element defaults all the core network elements to allow the H2H devices of different priorities to access or allow the H2H devices of different service types to access the access network element.
  • the destination network element can be selected according to the priority of the H2H device or the type of the service to be initiated.
  • the access network element needs to know the access capability information of the core network element for the H2H device through the S1 interface or the Iu interface.
  • the relay node is a wireless access device introduced to extend the coverage of the cell, reduce the dead zone in the communication, and balance the load.
  • the relay node accesses the network through the cell under the jurisdiction of the base station to provide new network coverage.
  • the H2H device or the MTC device accesses the network through the area covered by the relay node.
  • the base station needs to select a core network element that supports the access of the relay node, or select a core network element that allows access level access of the relay node.
  • the embodiment of the present invention further provides a terminal access system, where the system mainly includes a capability information acquiring unit and a terminal access unit in an access network element, where:
  • the capability information acquiring unit is configured to acquire access capability information of the core network element for the terminal;
  • the terminal access unit is configured to: when the terminal accesses the network, select, according to the access capability information of the core network element obtained by the capability information acquiring unit, the core network element that is selected for the terminal.
  • the access capability information for the terminal acquired by the capability information acquiring unit includes one or more of the following information:
  • the signaling connection rate allowed to access the number of signaling connections allowed to be added, the total amount of signaling allowed to access, the service connection rate allowed to access, the number of service connections allowed to be added, and the total amount of services allowed to access. .
  • the access capability information is for a specific terminal type, or is applicable to all terminal types.
  • the terminal access unit is configured to select, according to information about the terminal that is carried by the terminal when accessing the network, a core network element that can provide terminal access requirements for the terminal;
  • the information of the terminal includes type indication information of the terminal; or the information of the terminal includes type indication information of the terminal, and one or more of the following information: an access level of the terminal.
  • the system may further include a capability information sending unit in the core network element, where the capability information acquiring unit is configured to acquire the core network element for the terminal by using the interface signaling to the capability information sending unit.
  • Access capability information is configured to acquire the core network element for the terminal by using the interface signaling to the capability information sending unit.
  • the capability information sending unit is configured to send the access capability information of the core network element to the terminal through the interface signaling to the capability information acquiring unit;
  • the interface signaling is S1 signaling in an LTE system, or Iu signaling in a WCDMA system.
  • the S1 signaling is: S1 establishment response signaling, mobility management entity (MME) configuration update signaling, overload control start signaling, or custom S1 signaling;
  • MME mobility management entity
  • the Iu signaling is: overload control start signaling, information delivery indication, reset signaling, or custom Iu signaling.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may use software functions.
  • the form of the module is implemented. The invention is not limited to any specific form of combination of hardware and software.
  • the foregoing implementation manner can ensure that the network maintains normal operation when a large number of MTC devices access the network, which greatly reduces the possibility of congestion of the core network element.

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Abstract

一种终端接入的方法和系统,所述方法包括:接入网网元获取核心网网元针对终端的接入能力信息;当终端接入网络时,所述接入网网元根据获取的所述核心网网元针对终端的接入能力信息,为所述终端选择接入的核心网网元。

Description

一种终端接入的方法及系统
技术领域
本发明涉及无线通信技术领域, 尤其涉及一种终端接入的方法及系统。
背景技术
H2H ( Human to Human, 人对人)通信是指人与人之间的通信, 通过对 设备的操作进行通信, 现有无线通信技术是基于 H2H的通信发展起来的, 在 H2H通信中, 人们借助 H2H设备即通常意义下的 UE ( User Equipment, 用户 设备) 实现通信。 而 M2M ( Machine to Machine, 机器对机器)狭义上的定 义是机器到机器的通信, 广义上的定义是以机器终端智能交互为核心的、 网 络化的应用与服务。 它是基于智能机器终端, 以多种通信方式为接入手段, 为客户提供的信息化解决方案, 用于满足客户对监控、 指挥调度、 数据釆集 和测量等方面的信息化需求。
无线技术的发展是 M2M市场发展的重要因素, 它突破了传统通信方式 的时空限制和地域障碍, 使企业和公众摆脱了线缆束缚, 让客户更有效地控 制成本、降低安装费用并且使用简单方便。另外,日益增长的需求推动着 M2M 不断向前发展。 与信息处理能力及网络带宽不断增长相矛盾的是, 信息获取 的手段远远落后, 而 M2M很好的满足了人们的这一需求, 通过它, 人们可 以实时监测外部环境, 实现大范围、 自动化的信息釆集。 因此, M2M可以广 泛应用于行业应用、 家庭应用、 个人应用等。 行业应用如: 交通监控、 告警 系统、 海上救援、 自动售货机、 开车付费等。 家庭应用如: 自动抄表、 温度 控制等。 个人应用如: 生命检测、 远端诊断等。
M2M的通信对象为机器对机器,人对机器。 一个或多个机器之间的数据 通信定义为 MTC ( Machine Type Communication, 机器类通信 ) , 这种情况 下较少需要人机互动。 参与 MTC的机器, 定义为 MTC设备 ( MTC device, 简称为 MD ) 。 MTC设备是 MTC用户的终端 , 可通过 PLMN ( Public Land Mobile Network, 公共陆地移动网络)与 MTC设备、 MTC服务器进行通信。 引入 M2M应用后, 可以根据其特点对现有系统进行一些优化, 以满足 M2M应用需求, 并且对现有系统中的普通用户设备(User Equipment, 简称 为 UE )不产生影响。 M2M应用的一些显著特点有: MTC设备数量很多, 每 次传输的数据量小,传输间隔大,位置相对固定。鉴于 MTC设备的数量众多, 与普通 UE即 H2H设备的数量不在一个数量级, MTC设备的广泛应用很可能 使网络处于过载状态, 比如当某个小区突然发生停电事故, 当电源恢复时, 众多的 MTC设备可能同时尝试接入网络,这将导致网络处于过载状态。为了 应对 MTC设备引入导致的过载, 网络侧需要提升过载控制的能力,现有协议 中对于核心网网元要求具备新的处理过载的能力, 如 LTE ( Long Term Evolution, 长期演进) 系统的 MME ( Mobility Management Entity, 移动性管 理实体) , 需要根据 MTC设备上报的 APN ( Access point name, 接入点)的 业务量(最大的激活承载数、最大的承载速率等)实施基于 APN的过载控制, 可以向 UE发送注册拒绝( Attach Reject ) 、 位置区更新拒绝; MME需要具 备延迟 MTC设备注册请求、 业务请求(Service Request ) 的能力等。 MME 具备处理过载能力时, 才能保证 MTC设备大量接入网络时不引发网络的瘫 痪。 因此, 需要在 MTC设备接入网络时, 将 MTC设备引入具备处理过载能 力的 MME才能实现过载控制。
目前 LTE系统的过载控制分两个层次: 接入网的过载控制和核心网的过 载控制; 接入网的过载控制仅针对 eNB的负载而言, 如果接入网没有过载, 则会将终端的请求信息发送给核心网, 如果核心网出现过载, 则核心网回拒 绝消息给终端, 终端退出系统, 之前建立的信令链路都释放。 整个过程会造 成很多无用的信令, 并且可能加剧核心网的拥塞状况, 也浪费了接入网的资 源。 发明内容
本发明解决的技术问题是提供一种终端接入的方法及系统, 解决现有技 术中过载控制可能造成很多无用的信令, 并且可能加剧核心网的拥塞状况, 浪费接入网的资源的问题。
为了解决上述问题, 本发明提供一种终端接入的方法, 包括: 接入网网元获取核心网网元针对终端的接入能力信息;
当终端接入网络时, 所述接入网网元根据获取的核心网网元针对终端的 接入能力信息, 为所述终端选择接入的核心网网元。
优选地, 所述方法具有以下特点:
其中, 所述针对终端的接入能力信息包括以下信息中的一种或多种: 允许接入的信令连接速率、 允许再增加的信令连接数量、 允许接入的信 令总量、 允许接入的业务连接速率、 允许再增加的业务连接数量、 允许接入 的业务总量。
优选地, 所述方法具有以下特点:
所述接入能力信息针对特定终端类型, 或者适用于所有终端类型。
优选地, 所述方法具有以下特点:
所述接入网网元为所述终端选择接入的核心网网元的步骤包括: 根据所 述终端接入网络时携带的所述终端的信息, 为所述终端选择能提供终端接入 需求的核心网网元;
其中, 所述终端的信息包括所述终端的类型指示信息; 或者, 所述终端 的信息包括所述终端的类型指示信息, 以及以下信息中的一种或多种: 所述 终端的接入等级信息、 所述终端的优先级信息、 所述终端发起的业务类型、 所述终端发起的业务优先级的信息。
优选地, 所述方法具有以下特点:
接入网网元获取核心网网元针对终端的接入能力信息的步骤包括: 所述接入网网元通过接口信令向所述核心网网元获取所述核心网网元针 对终端的接入能力信息; 或者,
所述核心网网元将针对终端的接入能力信息通过接口信令发送给所述接 入网网元;
其中, 所述接口信令为长期演进(LTE ) 系统中的 S1信令, 或宽带码分 多址( WCDMA ) 系统中的 Iu信令。
优选地, 所述方法具有以下特点: 所述 SI信令为: SI建立响应信令、 移动性管理实体(MME ) 配置更新 信令、 过载控制开始信令、 或自定义的 S1信令;
所述 Iu信令为: 过载控制开始信令、 信息传递指示、 重设信令、 或自定 义的 Iu信令。
优选地, 所述方法具有以下特点:
所述接入网网元为 LTE系统中的基站, 或 WCDMA系统中的无线网络 控制器;
所述核心网网元为 LTE系统中的 MME , 或 WCDMA系统中的移动交换 中心 (MSC )和 /或通用分组无线服务技术服务支持节点 (SGSN ) 。
所述终端为以下类型中的一种或多种: 人对人(H2H )设备、 机器类通 信(MTC )设备、 中继节点。
为了解决上述问题, 本发明提供一种终端接入系统, 包括接入网网元中 的能力信息获取单元和终端接入单元, 其中:
所述能力信息获取单元设置为: 获取核心网网元针对终端的接入能力信 息;
所述终端接入单元设置为: 终端接入网络时, 根据所述能力信息获取单 元获取的核心网网元针对终端的接入能力信息, 为所述终端选择接入的核心 网网元。
优选地, 所述系统具有以下特点:
所述能力信息获取单元获取的所述针对终端的接入能力信息, 包括以下 信息中的一种或多种:
允许接入的信令连接速率、 允许再增加的信令连接数量、 允许接入的信 令总量、 允许接入的业务连接速率、 允许再增加的业务连接数量、 允许接入 的业务总量。
优选地, 所述系统具有以下特点:
所述接入能力信息针对特定终端类型, 或者适用于所有终端类型。
优选地, 所述系统具有以下特点: 所述终端接入单元是设置为: 根据所述终端接入网络时携带的所述终端 的信息, 为所述终端选择能提供终端接入需求的核心网网元;
其中, 所述终端的信息包括所述终端的类型指示信息; 或者, 所述终端 的信息包括所述终端的类型指示信息, 以及以下信息中的一种或多种: 所述 终端的接入等级信息、 所述终端的优先级信息、 所述终端发起的业务类型、 所述终端发起的业务优先级的信息。
优选地, 所述系统还包括核心网网元中的能力信息发送单元,
所述能力信息获取单元是设置为: 通过接口信令向所述能力信息发送单 元获取所述核心网网元针对终端的接入能力信息;
所述能力信息发送单元设置为: 将核心网网元针对终端的接入能力信息 通过接口信令发送给所述能力信息获取单元;
其中, 所述接口信令为 LTE系统中的 S1信令, 或 WCDMA系统中的 Iu 信令。
优选地, 所述系统具有以下特点:
所述 S1信令为: S1建立响应信令、 移动性管理实体(MME ) 配置更新 信令、 过载控制开始信令、 或自定义的 S1信令;
所述 Iu信令为: 过载控制开始信令、 信息传递指示、 重设信令、 或自定 义的 Iu信令。
釆用上述方案,接入网网元通过接口信令获知核心网网元处理 MTC设备 的能力信息,可以在 MTC设备接入网络时为其选择合适的核心网网元,并且 不会超过给核心网网元设定的容量限制, 从而可以保证网络在大量的 MTC 设备接入网络时保持正常的运行, 大大减少了核心网网元出现拥塞的可能。 此外, 上述方案还可以应用到其他所有终端, 根据终端的接入等级或优先级, 或其发起的业务类型或业务优先级, 为终端选择具备相应处理能力的核心网 网元。 附图概述 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中:
图 1为根据已有技术的 LTE系统的网络布局示意图;
图 2为本发明实施例的建立 S1接口的流程示意图;
图 3为根据已有技术的 WCDMA系统的网络布局示意图;
图 4为本发明实施例的终端接入系统示意图。
本发明的较佳实施方式
本发明的实施方式中, 终端接入网络时, 接入网网元为其选择合适的核 心网, 以防止核心网网元过载。
具体地, 接入网网元获取核心网网元针对终端的接入能力信息; 当终端 接入网络时, 所述接入网网元根据获取的核心网网元针对终端的接入能力信 息, 为所述终端选择接入的核心网网元。
其中, 所述针对终端的接入能力信息包括以下信息中的一种或多种的任 意组合:
允许接入的信令连接速率、 允许再增加的信令连接数量、 允许接入的信 令总量、 允许接入的业务连接速率、 允许再增加的业务连接数量、 允许接入 的业务总量。
所述接入能力信息可针对特定终端类型, 比如 MTC设备,也可以适用于 所有终端类型。
较佳的, 所述接入网网元为所述终端选择接入的核心网网元时, 可根据 所述终端接入网络时携带的所述终端的信息 , 为所述终端选择能提供终端接 入需求的核心网网元; 其中, 所述终端的信息包括所述终端的类型指示信息; 或者, 所述终端 的信息包括所述终端的类型指示信息, 以及以下信息中的一种或多种的任意 组合: 所述终端的接入等级信息、 所述终端的优先级信息、 所述终端发起的 业务类型、 所述终端发起的业务优先级的信息。 较佳的 , 所述接入网网元通过接口信令向所述核心网网元获取其针对终 端的接入能力信息, 或者, 所述核心网网元将针对终端的接入能力信息通过 接口信令发送给所述接入网网元。
所述接口信令包括 LTE系统中的 S1信令, 或 WCDMA ( Wideband Code Division Multiple Access, 宽带码分多址) 系统的 Iu信令。
其中, 所述 S1信令包括: S1建立响应信令、 MME配置更新信令、 过载 控制开始 ( Overload start )信令、 或自定义的 S1信令;
所述 Iu信令包括: 过载控制开始(Overload start )信令、 信息传递指示、 重设信令或自定义的 Iu信令。
其中,所述接入网网元为 LTE系统中的基站,或 WCDMA系统中的 RNC
( Radio Network Control, 无线网络控制器) ;
所述核心网网元为 LTE系统中的 MME , WCDMA系统中的 MSC( Mobile services Switching Center, 移动业务交换中心)和 /或 SGSN ( Serving GPRS Support Node , GPRS服务支持节点) 。
其中, 所述终端包括 H2H设备、 MTC设备、 中继节点或其他无线接入 设备。 所述终端的类型指示信息是指 H2H设备的指示信息、 或 MTC设备的 指示信息、 或中继节点的指示信息、 或其他无线接入设备的指示信息。
为了便于阐述本发明, 以下将结合附图及具体实施例对本发明技术方案 的实施作进一步详细描述。 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组合。
实施例一
LTE系统的网络布局如图 1所示, 基站和核心网网元 MME之间存在 S 1 接口, 相邻的基站之间存在 X2接口。
本实施例中, 基站 1 ( LTE 系统的任意一个基站) 刚上电启动, 从后台
OAM( Operation & Management,操作与控制服务器)获得必备的网络参数后, 需要与核心网建立 S1接口, 以便为其覆盖下的普通用户设备提供服务, 也为 其覆盖下的 MTC设备提供服务。 建立 S1接口的流程如图 2所示: 步骤 201 , 基站 1向 MME1发送 SI建立请求( SI Setup Request ) , 在 该请求中携带基站所辖小区的位置区标识(Track Area Code )和基站标识等 信息;
步骤 202 , MME1向基站 1返回 S1建立响应 ( SI Setup Response ) , 在 该响应中包含 Served GUMMEI ( Globally Unique MME Identifier ,服务的全球 唯一 MME标识 )和相对的 MME能力 ( Relative MME Capacity ) ;
此处, 相对的 MME能力是指一个 MME相对于其他 MME的处理能力 , 可以理解为 MME的负载能力信息, 用于 MME之间实施负载均衡。
本实施例中, 还新增信元表示该 MME1针对终端的接入能力信息, 该针 对终端的接入能力信息可以为: 允许接入的信令连接速率、 允许再增加的信 令连接数量、 允许接入的信令总量、 允许接入的业务连接速率、 允许再增加 的业务连接数量、 允许接入的业务总量;
基站 1收到 MME1返回的 S1建立响应后, 根据得到的该 MME1针对终 端的接入能力信息,获知 MME1具备处理 MTC设备的能力、允许 MTC设备 接入的能力、 或具有针对 MTC设备的过载处理能力, 将其应用于 MTC设备 接入网络时的核心网网元(指 MME ) 的选择中。 基站 1还会与其他的 MME 建立 S1接口, 以便能够实现 MME之间的负载均衡。
基站 1为其覆盖下的普通用户设备和 MTC设备提供服务后, MTC设备 1 (此处用 MD1表示 )需要接入网络时, 在基站 1所辖小区发起随机接入, 向基站 1发送 RRC连接请求( RRC Connection Request ); 基站 1为 MD1建 立 SRB ( Signaling Radio Bearer, 信令无线承载), 向 MD1发送 RRC连接建 立信令( RRC Connection Setup ); MD1获得基站 1为其配置的参数后, 向基 站 1发送 RRC连接建立完成信令 ( RRC Connection Setup Complete ) , 在该 信令中携带了非接入层信令(NAS信令) 。 在 RRC建立的过程中, MD1向 基站 1发送的 RRC信令携带了表征 MTC设备的类型指示信息, 以区分普通 的用户设备即 H2H设备, MD1可以通过 RRC连接请求或 RRC连接建立完 成信令携带 MTC设备的类型指示信息(如表征 MTC设备的标识信息) , 还 可包括: MTC设备的接入等级信息、 MTC设备的优先级信息、 MTC设备发 起的业务类型, 或 MTC设备发起的业务优先级的信息。 当基站 1收到 MD1发送的携带 NAS信令的 RRC连接建立完成信令后, 需要选择 MME发送该 NAS信令, 由于基站 1通过 S1接口的建立过程获知 MME1具备处理 MTC设备的能力、 允许 MTC设备接入的能力、 或具有针对 MTC设备的过载处理能力,基站 1为 MD1向 MME1发送初始用户设备消息 ( Initial UE Message ) , 该消息携带 MD1发来的 NAS信令。 此后, MME1 为该 MD1配置建立数据无线承载所需的参数, 为 MD1选择合适的用户面网 关, 在建立了无线接入承载后, MD1 可以与 MTC服务器、 或其他的 MTC 设备实现通信。
本实施例中, 基站 1通过 S1接口的建立流程获知 MME1具备是否处理 MTC设备的能力, 然后在 MTC设备接入网络时能够为其正确的选择 MME, 保证了 MTC设备接入网络后能正常开展通信。 将 MTC设备引导到能够处理 MTC设备的 MME ,是为了避免大量 MTC设备接入普通的 MME导致的过载。
本实施例中, 基站 1通过 S1接口的建立流程获知 MME1是否具备处理 MTC设备的能力, 基站 1也可以在 S1接口建立后, 通过 MME发送的 MME 配置更新信令 ( MME Configuration Update )获取 MME是否具备处理 MTC 设备的能力, 或者, 基站 1 也可以在 S1 接口建立后, 通过过载控制开始 ( Overload start )信令、 或其他 S1信令获取 MME是否具备处理 MTC设备 的能力。例如,基站 1已经与某个 MME( MME2 )建立了 S1接口,之后 MME2 由于升级具备了处理 MTC设备的能力, 此时, MME2可以通过向基站 1发 送 MME配置更新信令表示该 MME2具备处理 MTC设备的能力、 允许 MTC 设备接入的能力、 或具有针对 MTC设备的过载处理能力,基站 1获取后, 将 其应用于 MTC设备接入网络时的核心网网元的选择中。
实施例二
WCDMA系统的网络布局如图 3所示, RNC通过 Iu接口分别与核心网 网元 MSC和 SGSN相连, RNC之间建有 Iur接口, RNC与基站之间建有 Iub 接口。
RNC接入网络与核心网建立 Iu接口后, 为了实现网络共享、 负载均衡, RNC与多个 MSC、 多个 SGSN建立了 Iu接口。 当其中的某个 SGSN (此处 假定为 SGSN1 )升级后具备处理 MTC设备的能力后, SGSN1通过 Iu接口向 RNC发送携带允许接入的信令连接速率、 允许再增加的信令连接数量、 允许 接入的信令总量、 允许接入的业务连接速率、 允许再增加的业务连接数量、 允许接入的业务总量中的一种或多种组合。 SGSN1可以复用现有的 Iu接口信 令如过载控制开始( Overload start )信令、信息传递指示( Information Transfer Indication )、 重设(Reset )信令, 也可以釆用自定义的 Iu信令, 携带表征具 备处理 MTC设备能力的信元。 RNC收到 SGSN1具备处理 MTC设备能力的 信元后, 将其应用于 MTC设备接入网络时的核心网网元(指 SGSN )的选择 中。
RNC为其覆盖下的普通用户设备和 MTC设备提供服务后, MTC设备 1
(以下也称作 MD1 )需要接入网络时, 在 RNC所辖小区(指 RNC管辖的基 站所辖小区)发起随机接入, 向 RNC发送 RRC连接请求; RNC为 MD1建 立信令无线承载( SRB ) , 向 MD1发送 RRC连接建立信令; MD1获得 RNC 为其配置的参数后, 向 RNC发送 RRC连接建立完成信令。在 RRC建立的过 程中, MD1向 RNC发送的 RRC信令携带了表征 MTC设备的标识信息, 以 区分普通的用户设备, MD1可以通过 RRC连接请求或 RRC连接建立完成信 令携带 MTC设备的类型指示信息如表征 MTC设备的标识信息及 MTC设备 的等级或优先级信息。 在 SRB建立之后, MD1向 RNC发送初始直传(Initial Direct Transfer ) , 携带 NAS层信令, RNC收到后, 需要选择 SGSN发送该 NAS信令, 由于 RNC通过 Iu接口信令获知 SGSN1具备处理 MTC设备的能 力、允许 MTC设备接入的能力、或具有针对 MTC设备的过载处理能力, RNC 为 MD1向 SGSN1发送初始用户设备消息 (Initial UE Message ) , 该消息携 带 MD1发来的 NAS信令。 此后, SGSN1为该 MD1配置建立数据无线承载 所需的参数, 为 MD1 选择合适的用户面网关, 在建立了无线接入承载后, MD1可以与 MTC服务器、 或其他的 MTC设备实现通信。 为 MD设备选择 支持 MTC设备的核心网网元能够避免由于大量 MTC设备接入导致的过载问 题。
本实施例中, MD1通过 RRC连接请求或 RRC连接建立完成信令携带表 征 MTC设备的类型指示信息, MD1也可以在初始直传中携带表征 MTC设备 的类型指示信息, 因为 RNC是在收到初始直传之后才选择核心网网元的。 本实施例中主要针对 RNC选择 SGSN的, 因为 MTC设备通常发起的都 是 PS域的业务, 因此 RNC需要为 MTC选择 SGSN。 如果 MTC设备也能够 发起语音业务( CS域的业务 ) ,则 RNC需要为 MTC选择 MSC,在选择 MSC 之前, 需要通过 Iu接口获得该 MSC是否支持 MTC设备的能力信息。
实施例三
本实施例中, 基站 1 ( LTE 系统的任意一个基站) 刚上电启动, 从后台 操作与控制服务器 (OAM )获得必备的网络参数后, 需要与核心网建立 S1 接口, 以便为其覆盖下的普通用户设备提供服务,也为其覆盖下的 MTC设备 提供服务。 建立 S1接口的流程为:
步骤 301 , 基站向 MME1发送 S1建立请求(SI Setup Request ) , 在该 请求中携带基站所辖小区的位置区标识(Track Area Code )和基站标识等信 息;
步骤 302, MME1向基站 1返回 S1建立响应 ( SI Setup Response ) , 在 该响应中包含 Served GUMMEI ( Globally Unique MME Identifier,服务的全球 唯一 MME标识 )和相对的 MME能力 ( Relative MME Capacity ) 。
MME1向基站 1返回 SI建立响应携带针对 MTC设备的接入能力信息, 针对 MTC设备的接入能力信息可以为: 允许接入的信令连接速率、允许再增 加的信令连接数量、 允许接入的信令总量、 允许接入的业务连接速率、 允许 再增加的业务连接数量、 允许接入的业务总量。
之后, 如果 MTC设备通过基站 1接入网络, 基站 1通过 RRC建立过程 获知了该 MTC设备需要的信令连接速率, 如果该 MTC设备需要的信令连接 速率超过 MME1指示的能力范围, 则基站 1不能选择 MME1发送初始用户 设备消息, 此时如果与基站 1建有 S1接口的 MME均不能提供该 MTC设备 需要的信令连接速率能力时,基站 1将拒绝该 MTC设备的接入;如果 MME1 的能力满足该 MTC设备需要的信令连接速率, 则基站 1可以选择 MME1发 送初始用户设备消息, MTC设备可以接入网络开展业务。 MME可以通过 SI建立响应、 MME配置更新、 过载控制开始等信令向 基站发送允许接入的信令连接速率、 允许再增加的信令连接数量、 允许接入 的信令总量、 允许接入的业务连接速率、 允许再增加的业务连接数量、 允许 接入的业务总量等能力信息, MME也可以通过自定义的 S1信令实现该能力 信息的传递。
实施例四
本实施例中, MME通过 S1建立响应、 MME配置更新、 过载控制开始 等信令向基站发送该 MME的针对 MTC设备的接入能力信息,所述能力信息 可以为: 允许接入的信令连接速率、 允许再增加的信令连接数量、 允许接入 的信令总量、 允许接入的业务连接速率、 允许再增加的业务连接数量、 允许 接入的业务总量。
基站收到后,将其应用于 MTC设备接入网络时的核心网网元(指 MME ) 的选择中。
之后, 如果 MTC设备通过基站接入网络, 基站通过 RRC建立过程获知 了该 MTC设备发起的信令连接的信令连接量, 如果当前该基站连接到某个 MME的信令连接的总量加上该 MTC设备新增的信令连接量超过该 MME指 示的允许接入的信令总量, 则基站 1不能选择该 MME发送初始用户设备消 息; 如果没有超过允许接入的信令总量, 则基站可以选择该 MME发送初始 用户设备消息, MTC设备可以接入网络开展业务。
本实施例中, 基站通过 S1信令获知 MME针对 MTC设备的接入能力信 息,基站也可以通过其后台操作与管理服务器获知 MME针对 MTC设备的接 入能力信息,基站获知 MME的能力信息后, 将其应用于 MTC设备接入网络 时的 MME选择中。
需要说明的是,上述实施例是以 MTC设备为例对本发明技术方案的实施 进行了具体描述,但本发明并不局限于 MTC设备,可以扩展到所有类型的终 端接入网络时的核心网网元的选择过程。 例如, 终端还可以是 H2H设备、 中 继节点, 或者其他无线接入设备。基站或 RNC通过接口信令获知核心网网元 针对各种终端的接入能力信息, 然后将其应用于终端接入网络时的核心网网 元的选择。
对于 H2H设备,现有的接入网网元默认所有的核心网网元均能允许不同 优先级的 H2H设备接入、 或允许发起不同业务类型的 H2H设备接入, 为了 实现接入网网元能够依据 H2H设备的优先级或发起的业务类型选择合适的核 心网网元的目的, 接入网网元需要通过 S1接口或 Iu接口获知核心网网元针 对 H2H设备的接入能力信息。
中继节点 (Relay Node )是为了扩展小区的覆盖范围, 减少通信中的死 角地区, 平衡负载而引入的无线接入设备, 中继节点通过基站所辖小区接入 网络, 提供新的网络覆盖, H2H设备或 MTC设备通过中继节点所覆盖的区 域接入网络。 基站在中继节点接入网络时需要选择支持中继节点接入的核心 网网元、 或选择允许所述中继节点的接入等级接入的核心网网元。
如图 4所示, 本发明实施例中还提供了一种终端接入系统, 该系统主要 包括接入网网元中的能力信息获取单元和终端接入单元, 其中:
所述能力信息获取单元, 设置为获取核心网网元针对终端的接入能力信 息;
所述终端接入单元, 设置为终端接入网络时, 根据所述能力信息获取单 元获取的核心网网元针对终端的接入能力信息, 为所述终端选择接入的核心 网网元。
优选地, 所述能力信息获取单元获取的所述针对终端的接入能力信息, 包括以下信息中的一种或多种:
允许接入的信令连接速率、 允许再增加的信令连接数量、 允许接入的信 令总量、 允许接入的业务连接速率、 允许再增加的业务连接数量、 允许接入 的业务总量。
优选地, 所述接入能力信息针对特定终端类型, 或者适用于所有终端类 型。 优选地, 所述终端接入单元是设置为, 根据所述终端接入网络时携带的 所述终端的信息, 为所述终端选择能提供终端接入需求的核心网网元;
其中, 所述终端的信息包括所述终端的类型指示信息; 或者, 所述终端 的信息包括所述终端的类型指示信息, 以及以下信息中的一种或多种: 所述 终端的接入等级信息、 所述终端的优先级信息、 所述终端发起的业务类型、 所述终端发起的业务优先级的信息。
优选地, 所述系统还可包括核心网网元中的能力信息发送单元, 所述能力信息获取单元是设置为, 通过接口信令向所述能力信息发送单 元获取所述核心网网元针对终端的接入能力信息;
所述能力信息发送单元设置为, 将核心网网元针对终端的接入能力信息 通过接口信令发送给所述能力信息获取单元;
其中, 所述接口信令为 LTE系统中的 S1信令, 或 WCDMA系统中的 Iu 信令。
优选地, 所述 S1信令为: S1建立响应信令、 移动性管理实体(MME ) 配置更新信令、 过载控制开始信令、 或自定义的 S1信令;
所述 Iu信令为: 过载控制开始信令、 信息传递指示、 重设信令、 或自定 义的 Iu信令。
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。
以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。 工业实用性
上述实施方式可以保证网络在大量的 MTC设备接入网络时保持正常的 运行, 大大减少了核心网网元出现拥塞的可能。

Claims

权 利 要 求 书
1、 一种终端接入的方法, 包括:
接入网网元获取核心网网元针对终端的接入能力信息;
当终端接入网络时, 所述接入网网元根据获取的所述核心网网元针对终 端的接入能力信息, 为所述终端选择接入的核心网网元。
2、 如权利要求 1所述方法, 其中,
所述核心网网元针对终端的接入能力信息包括以下信息中的一种或多 种:
允许接入的信令连接速率、 允许再增加的信令连接数量、 允许接入的信 令总量、 允许接入的业务连接速率、 允许再增加的业务连接数量、 允许接入 的业务总量。
3、 如权利要求 2所述的方法, 其中,
所述接入能力信息针对特定终端类型, 或者适用于所有终端类型。
4、 如权利要求 1所述的方法, 其中,
所述接入网网元为所述终端选择接入的核心网网元的步骤包括: 根据所 述终端接入网络时携带的所述终端的信息, 为所述终端选择能提供终端接入 需求的核心网网元;
所述终端的信息包括所述终端的类型指示信息; 或者, 所述终端的信息 包括所述终端的类型指示信息, 以及以下信息中的一种或多种: 所述终端的 接入等级信息、 所述终端的优先级信息、 所述终端发起的业务类型、 所述终 端发起的业务优先级的信息。
5、 如权利要求 1所述方法, 其中,
所述接入网网元获取核心网网元针对终端的接入能力信息的步骤包括: 所述接入网网元通过接口信令向所述核心网网元获取所述核心网网元针 对终端的接入能力信息; 或者,
所述核心网网元将针对终端的接入能力信息通过接口信令发送给所述接 入网网元; 其中, 所述接口信令为长期演进(LTE ) 系统中的 SI信令, 或宽带码分 多址( WCDMA ) 系统中的 Iu信令。
6、 如权利要求 5所述的方法, 其中,
所述 S1信令为: S1建立响应信令、 移动性管理实体(MME ) 配置更新 信令、 过载控制开始信令、 或自定义的 S1信令;
所述 Iu信令为: 过载控制开始信令、 信息传递指示、 重设信令、 或自定 义的 Iu信令。
7、 如权利要求 1所述方法, 其中,
所述接入网网元为 LTE系统中的基站, 或 WCDMA系统中的无线网络 控制器;
所述核心网网元为 LTE系统中的 MME , 或 WCDMA系统中的移动交换 中心 (MSC )和 /或通用分组无线服务技术服务支持节点 (SGSN ) ;
所述终端为以下类型中的一种或多种: 人对人(H2H )设备、 机器类通 信(MTC )设备、 中继节点。
8、一种终端接入系统, 其包括接入网网元中的能力信息获取单元和终端 接入单元, 其中:
所述能力信息获取单元设置为: 获取核心网网元针对终端的接入能力信 息;
所述终端接入单元设置为: 终端接入网络时, 根据所述能力信息获取单 元获取的核心网网元针对终端的接入能力信息, 为所述终端选择接入的核心 网网元。
9、 如权利要求 8所述的系统, 其中,
所述能力信息获取单元获取的所述针对终端的接入能力信息, 包括以下 信息中的一种或多种:
允许接入的信令连接速率、 允许再增加的信令连接数量、 允许接入的信 令总量、 允许接入的业务连接速率、 允许再增加的业务连接数量、 允许接入 的业务总量。
10、 如权利要求 9所述的系统, 其中,
所述接入能力信息针对特定终端类型, 或者适用于所有终端类型。
11、 如权利要求 8所述的系统, 其中,
所述终端接入单元是设置为: 根据所述终端接入网络时携带的所述终端 的信息, 为所述终端选择能提供终端接入需求的核心网网元;
其中, 所述终端的信息包括所述终端的类型指示信息; 或者, 所述终端 的信息包括所述终端的类型指示信息, 以及以下信息中的一种或多种: 所述 终端的接入等级信息、 所述终端的优先级信息、 所述终端发起的业务类型、 所述终端发起的业务优先级的信息。
12、 如权利要求 8所述的系统, 所述系统还包括核心网网元中的能力信 息发送单元,
所述能力信息获取单元是设置为通过接口信令向所述能力信息发送单元 获取所述核心网网元针对终端的接入能力信息;
所述能力信息发送单元设置为: 将核心网网元针对终端的接入能力信息 通过接口信令发送给所述能力信息获取单元;
其中, 所述接口信令为长期演进(LTE ) 系统中的 S1信令, 或宽带码分 多址( WCDMA ) 系统中的 Iu信令。
13、 如权利要求 12所述的系统, 其中,
所述 S1信令为: S1建立响应信令、 移动性管理实体(MME ) 配置更新 信令、 过载控制开始信令、 或自定义的 S1信令;
所述 Iu信令为: 过载控制开始信令、 信息传递指示、 重设信令、 或自定 义的 Iu信令。
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