US9271222B2 - Method and apparatus for implementing access to machine to machine (M2M) core network - Google Patents

Method and apparatus for implementing access to machine to machine (M2M) core network Download PDF

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US9271222B2
US9271222B2 US13/520,573 US201013520573A US9271222B2 US 9271222 B2 US9271222 B2 US 9271222B2 US 201013520573 A US201013520573 A US 201013520573A US 9271222 B2 US9271222 B2 US 9271222B2
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core network
equipment
network
terminal equipment
access
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US20120287854A1 (en
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Baoguo Xie
Zhijun Li
Quanjun Tao
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W4/005—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the present invention relates to the field of communications, and in particular to a method and an apparatus for implementing an access to a Machine to Machine (M2M) core network.
  • M2M Machine to Machine
  • M2M communication services of M2M have been widely applied gradually, for example, to a logistics system, remote meter reading, smart home and the like.
  • Providers of M2M services mainly develop the M2M services using an existing radio network, such as General Packet Radio Service (GPRS) network, Evolved Packet System (EPS) network and other Packet Switch (PS) networks.
  • GPRS General Packet Radio Service
  • EPS Evolved Packet System
  • PS Packet Switch
  • the GPRS network is a second generation mobile communication network based on packet switch.
  • the GPRS is evolved as Universal Mobile Telecommunication System Packet Switch (UMTS PS).
  • FIG. 1 shows a diagram of network architecture of the UMTS PS according to a related art. As shown in FIG. 1 , the network architecture comprises the following network elements:
  • Radio Network System which contains a NodeB and a Radio Network Controller (RNC), wherein the NodeB provides an air interface connection for a terminal; the RNC mainly manages radio resources and controls the NodeB; the RNC is connected with the NodeB through an lub interface; the terminal accesses a Packet Core network of a Universal Mobile Telecommunication System (UMTS) through the RNS;
  • UMTS Universal Mobile Telecommunication System
  • SGSN Serving GPRS Support Node
  • GGSN Gateway GPRS Support Node
  • HLR Home Location Register
  • PDN Packet Data Network
  • Gi interface a Packet Data Network
  • MTC Machine Type Communication
  • UE User Equipment
  • the GPRS network establishes an RNC-SGSN-GGSN tunnel for this transmission, wherein the tunnel is based on a GPRS Tunneling Protocol (GTP) and the data information is reliably transmitted through the GTP tunnel.
  • GTP GPRS Tunneling Protocol
  • SAE System Architecture Evolution
  • E-UTRAN Evolved UTRAN
  • WLAN Wireless Local Area Network
  • FIG. 2 shows a diagram of a network system architecture of an EPS according to a related art.
  • the network element i.e. Evolved NodeB (eNodeB) contained in an Evolved Radio access network (E-RAN) is used for providing radio resources for the access of a user.
  • E-RAN Evolved Radio access network
  • a Packet Data Network (PDN) is a network for providing services for a user.
  • the EPC provides lower time delay and allows the access of more radio access systems, wherein the EPC comprises the network elements as follows.
  • a Mobility Management Entity is a control plane function entity and a server for temporarily storing user data, and is responsible for managing and storing a context of a UE (for example, user identifier, mobility management state, user security parameters and the like), allocating a temporary identifier for a user, and authenticating a user when a UE constantly resides in the tracking area or the network.
  • MME Mobility Management Entity
  • a Serving Gateway is a user plane entity and is responsible for processing routing of user plane data, terminating downlink data of a UE in an idle (ECM_IDLE) state, and managing and storing an SAR bearer context of a UE (for example, IP bearer service parameters, network internal routing information and the like).
  • the SGW acts as an anchor of the user plane in the 3GPP system, and one user can have only one SGW at the same time.
  • a PDN Gateway is a gateway taking charge of the access of a UE to the PDN, also is a mobility anchor of 3GPP and non-3GPP access systems, and is used to allocate an IP address of a user; the function of the PGW also comprises policy enforcement and charging support.
  • a user can access a plurality of PGWs at the same time.
  • a Policy and Charging Enforcement Function (PCEF) also is located in the PGW.
  • PCRF Policy and Charging Rules Function
  • a Home Subscriber Server is responsible for storing user subscription data permanently.
  • the content stored by the HSS comprises an International Mobile Subscriber Identification (IMSI) of a UE, and the IP address of the PGW.
  • IMSI International Mobile Subscriber Identification
  • the SGW and the PGW can be integrated; the user plane network element of the EPC system comprises the SGW and the PGW.
  • An MTC server is mainly responsible for information collection and data storage/process of an MTC UE and can perform necessary management for the MTC UE.
  • An MTC UE generally is responsible for gathering information of a number of collectors and accesses a core network through an RAN node to interact data with an MTC Server.
  • the MTC UE needs to transmit data information to the MTC Server or other MTC UEs through the EPS network.
  • the SAE network establishes a GTP tunnel between the SGW and the PGW for this transmission and the data information is reliably transmitted through the GTP tunnel.
  • FIG. 3 shows a flowchart of a UE accessing an EPS network to perform an attachment procedure according to a related art.
  • the related attachment process mainly comprises the following steps (Step 301 to Step 318 ).
  • Step S 301 in order to access an SAE network, the UE initiates a network attachment request to an eNodeB, wherein the request carries information such as IMSI, network access capability of the UE, and indication of requesting allocation of IP.
  • Step S 302 the eNodeB selects for the UE an MME serving the UE and forwards the attachment request to the MME, and meanwhile carries important information, such as UE identifier, to the MME.
  • Step S 303 the MME sends an authentication data request message (containing IMSI) to an HSS; the HSS first judges subscription data corresponding to the IMSI, if no subscription is found or the IMSI has been added to a black list, the HSS returns an authentication data response carrying an appropriate error cause to the MME; if the subscription data corresponding to the IMSI are found, the HSS returns an authentication data response message (containing authentication vector) to the MME.
  • an authentication data request message containing IMSI
  • the MME executes the authentication process to verify the legality of the IMSI of the terminal, and executes a security mode process to enable a secure connection.
  • Step S 304 the MME sends a location update request message to the HSS of the home network to notify the area that the UE currently accesses, wherein the request message carries the identifier of the MME and the identifier of the UE.
  • Step S 305 the HSS finds out the subscription user data of the UE according to the identifier of the UE and sends the subscription user data to the MME, wherein the user data mainly comprise information such as default Access Point Name (APN) and bandwidth size.
  • the user data mainly comprise information such as default Access Point Name (APN) and bandwidth size.
  • API Access Point Name
  • the MME receives the data, checks whether the UE is allowed to access the network and returns a user accepted response to the HSS; if the MME finds that the UE has problems such as roaming limit or access limit, the MME would forbid the attachment of the UE and notify the HSS.
  • Step S 306 the HSS sends a location update acknowledgement response to the MME.
  • Step S 307 the MME selects one S-GW for the LIE and sends a default bearer establishment request to the S-GW, wherein the request contains necessary information which the MME notifies the S-GW, such as the identifier of the UE, the identifier of the MME, the indication of allocating an IP address for the UE, default bandwidth information, and PDN GW address.
  • Step S 308 the S-GW sends a default bearer establishment request to the PDN GW, wherein the request contains necessary information which the S-GW notifies the PDN GW, such as the address of the S-GW, default bandwidth information, and the indication of allocating an IP address for the UE.
  • Step S 309 if necessary, the PDN GW requests a PCRF to configure policy and charging rules, and decision information for the UE.
  • Step S 310 the PDN GW establishes a default bearer according to the policy and charging rules and decision information returned from the PCRF, and returns a bearer establishment response to the S-GW.
  • Step S 311 the S-GW sends a default bearer establishment response to the MME.
  • Step S 312 the MME sends an attachment accepted response to the eNodeB, indicating that the request of attaching the UE to the network is accepted, wherein the response carries the address of the SGW and a Tunnel Endpoint Identifier (TEID).
  • TEID Tunnel Endpoint Identifier
  • Step S 313 the eNodeB sends a voice bearer establishment request to the UE, requiring the UE to store the important information of the bearer establishment and open a corresponding port, wherein the message carries information such as bearer network ID, PDN GW address, IP address allocated to the UE and bandwidth information.
  • Step S 314 the UE sends a radio bearer establishment response to the eNodeB.
  • Step S 315 the eNodeB notifies the MME that the attachment procedure is completed.
  • Step S 316 the MME sends a bearer update request to the S-GW, to notify the identifier and address of the eNodeB serving the UE.
  • Step S 317 the S-GW sends a bearer update response to the MME.
  • Step S 318 if the PDN GW is not specified by the HSS, the MME sends a location update request to the HSS, to notify the HSS of the address information of the PDN GW serving the UE; the HSS updates the information.
  • FIG. 4 shows a flowchart of a UE accessing a GPRS network to perform an attachment procedure according to a related art.
  • the related attachment process mainly comprises the following steps (Step 401 to Step 407 ).
  • Step S 401 a user initiates an attachment request message to an SGSN through an RNS for the first time, wherein the request message carries parameters such as attachment type and IMSI; the RNS routes the message to the SGSN according to the load condition of the RNS, with the IMSI of the user as request identification.
  • Step S 402 the SGSN requests an HLR to authenticate the IMSI; the HLR downloads authentication parameters according to the IMSI; and the SGSN authenticates the UE.
  • Step S 403 the SGSN sends a location update request to the HLR, wherein the request carries parameters such as SGSN number and address, and IMSI.
  • Step S 404 the HLR downloads subscription data corresponding to the IMSI for the SGSN; the SGSN performs an access control check for the ME to check whether the UE has an area limit or access limit, and then returns a data insertion response to the HLR.
  • Step S 405 the HLR confirms the location update message and sends a location update response to the SGSN. At this moment, if the location update request is rejected by the HLR, the SGSN would reject the attachment request of the UE.
  • Step S 406 the SGSN allocates a Packet-Temporary Mobile Subscriber Identity (P-TMSI) for the user, and then sends to the UE an attachment accepted message carrying information such as the P-TMSI allocated for the UE.
  • P-TMSI Packet-Temporary Mobile Subscriber Identity
  • Step S 407 if the P-TMSI is updated, the Mobile Station (MS) returns an attachment completed message to the SGSN to confirm; the GRPS attachment procedure is completed.
  • the existing terminal equipment such as a cell phone
  • the existing terminal equipment can receive a radio signal transmitted from a radio access network and attach to the network of an operator through the radio access network, and then carry out services such as a voice call.
  • the M2M service is a global machine type communication service which is just rising and is gradually put on the industrialization agenda.
  • the M2M service enables each industry and each individual to enjoy the convenience of information service anytime and anywhere, by collecting information data through an M2M terminal in a sensor network and then transmitting the information data through the network.
  • the M2M can be widely applied to industry applications, family applications, individual applications and so on.
  • the service comprises traffic monitoring, smart electric network, building alarm, sea rescue, vending machine, drive pay and so on.
  • the service comprises automatic meter reading, temperature control and so on.
  • the service comprises life detection, remote diagnosis and so on.
  • the communication objects of the M2M are machine to machine, and man to machine.
  • the data communication between one or more machines is defined as Machine Type Communication (MTC), and this condition needs few man-machine interactions.
  • MTC equipment A machine participating in the MTC is defined as MTC equipment.
  • the MTC equipment is a terminal of an MTC user, and this terminal can communicate with MTC equipment and an MTC server through a Public Land Mobile Network (PLMN) network.
  • PLMN Public Land Mobile Network
  • ME Mobile Equipment
  • ME is an additional functional module of the MTC equipment, and the functional module is configured to enable the MTC equipment to access a radio network (for example, EPS network, GPRS network and the like).
  • the MTC server manages and monitors the MTC equipment.
  • the MTC equipment mostly is the equipment of a specific application in different scenes, the MTC equipment is various in types and huge in number, for example, the equipment used in automatic meter reading is different from that used in life detection. Meanwhile, the MTC equipment also has different features due to different applications, for example, elevator equipment such as a lift has low mobility and PS only attribute, while a monitor and alarm equipment has features such as low-data-amount transmission and high availability, besides low mobility and PS only attribute.
  • the M2M equipment has many aspects different from the H2H equipment in application, specifically comprising: (1) the M2M terminals are huge in number, far more than the H2H terminals in quantity; thus, the terminal identification may not use the IMSI identification defined by the existing H2H terminal; (2) the M2M terminal is mainly for the application with low mobility and more than 90% of the M2M terminals are immoveable; thus, it has a big difference from the related art in mobility management (for example, the network does not need to perform location update process frequently); (3) the M2M terminal is mainly for the application with low data amount, which has a big difference from the services with high-bandwidth channel provided by the existing network; thus, the transmission mode of the network in the aspect of low data amount has a big difference from the related art; (4) other aspects, for example, the network needs to process the MTC equipment group and meet the requirement of each feature of the MTC terminal, for example, time control, MTC monitor and the like; all the above can only be satisfied by optimizing the existing network.
  • the mass development of the M2M terminals in quantity and the M2M application mode have a great difference from the existing H2H application; therefore, for different operators, the adoption of the existing network can not meet the requirement of the M2M services. Since the load of the existing network can not meet the requirement of the future M2M services, the operators need to optimize and deploy the network so as to meet the growing requirement of the M2M applications.
  • the present invention provides a method and an apparatus for implementing an access to an M2M core network, which at least solve one of the problems above.
  • a method for implementing an access to an M2M core network is provided.
  • the method for implementing the access to the M2M core network comprises: receiving, by a network element, an access request message carrying equipment identity indication information, wherein the access request message is initiated by terminal equipment; determining, by the network element, that the terminal equipment is M2M equipment according to the equipment identity indication information; and selecting, by the network element, a corresponding M2M core network for the terminal equipment to implement the access of the terminal equipment.
  • an apparatus for implementing an access to an M2M core network is provided.
  • the apparatus for implementing the access to the M2M core network comprises: a receiving unit, configured to receive an access request message carrying equipment identity indication information, wherein the access request message is initiated by terminal equipment; a determination unit, configured to determine that the terminal equipment is M2M equipment according to the equipment identity indication information; and an implementation unit, configured to select a corresponding M2M core network for the terminal equipment to implement the access of the terminal equipment.
  • a dedicated M2M core network which serves the M2M services particularly, is provided, thereby solving the problem in the relevant art that the adoption of the existing network can not meet the requirement of the M2M service; thus, the existing network can meet the M2M service requirement while still providing services for existing H2H equipment, without any need of enhancement and mass expansion.
  • FIG. 1 shows a diagram of a network system architecture of a UMTSPS according to a related art
  • FIG. 2 shows a diagram of a network system architecture of an EPS according to a related art
  • FIG. 3 shows a flowchart of a UE performing an attachment procedure in an EPS network according to a related art
  • FIG. 4 shows a flowchart of a UE performing an attachment procedure in a GPRS network according to a related art
  • FIG. 5 shows a structure diagram of an apparatus for implementing an access to an M2M core network according to an embodiment of the present invention
  • FIG. 6 shows a structure diagram of an apparatus for implementing an access to an M2M core network according to a preferable embodiment of the present invention
  • FIG. 7 shows a diagram of a first architecture of implementing an M2M service by adopting an M2M core network to share a radio access network in a GPRS network according to an embodiment of the present invention
  • FIG. 8 shows a diagram of a second architecture of implementing an M2M service by adopting an M2M core network to share a radio access network in a GPRS network according to an embodiment of the present invention
  • FIG. 9 shows a diagram of a third architecture of implementing an M2M service by adopting an M2M core network to share a radio access network in an EPS network according to an embodiment of the present invention
  • FIG. 10 shows a diagram of a fourth architecture of implementing an M2M service by adopting an M2M core network to share a radio access network in an EPS network according to an embodiment of the present invention
  • FIG. 11 shows a flowchart of a method for implementing an access to an M2M core network according to an embodiment of the present invention
  • FIG. 12 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 1 in a GPRS network according to an Embodiment 1 of the present invention
  • FIG. 13 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 1 in an EPS network according to an Embodiment 2 of the present invention
  • FIG. 14 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 2 in a GPRS network according to an Embodiment 3 of the present invention
  • FIG. 15 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 2 in an EPS network according to an Embodiment 4 of the present invention
  • FIG. 16 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 3 in a GPRS network according to an Embodiment 5 of the present invention.
  • FIG. 17 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 3 in an EPS network according to an Embodiment 6 of the present invention.
  • One mode is: updating the existing network to meet various application requirements of M2M terminals, with the cost of updating the entire network.
  • the other mode is: overlapping a dedicated M2M core network in the existing network to process the M2M service particularly, thereby meeting various requirements of M2M applications.
  • an apparatus for implementing an access to an M2M core network is provided.
  • a dedicated M2M core network is adopted to meet the requirement of the M2M service.
  • FIG. 5 shows a structure diagram of an apparatus for implementing an access to an M2M core network according to an embodiment of the present invention.
  • the apparatus comprises: a receiving unit 1 , a determination unit 2 and an implementation unit 3 .
  • the receiving unit 1 is configured to receive an access request message carrying equipment identity indication information, wherein the access request message is initiated by terminal equipment.
  • the determination unit 2 is configured to determine that the terminal equipment is M2M equipment according to the equipment identity indication information.
  • the implementation unit 3 is configured to select a corresponding M2M core network for the terminal equipment to implement the access of the terminal equipment.
  • this apparatus can implement the access of an M2M terminal to the dedicated M2M core network, and the existing network can meet the requirement of the M2M service while still providing services for existing H2H equipment, without any need of enhancement and mass expansion.
  • the equipment identity indication information comprises but is not limited to at least one of the following: equipment type information, equipment access capability information and equipment identification information (for example, IMSI number segment, Mobile Station Integrated Services Digital Network (MSISDN) number segment, Access Point Name (APN)).
  • equipment type information for example, IMSI number segment, Mobile Station Integrated Services Digital Network (MSISDN) number segment, Access Point Name (APN)
  • MSISDN Mobile Station Integrated Services Digital Network
  • API Access Point Name
  • the network element can be one of the following: an enhanced radio access network and a virtual gateway.
  • the enhanced radio access network refers that the existing radio access network is enhanced, and the enhanced radio access network possesses a capability of determining whether the terminal equipment is M2M equipment according to the equipment identity indication information.
  • the process of implementing the access of the M2M terminal to the M2M core network by the above apparatus comprises but is not limited to the following three implementation modes.
  • Mode 1 the apparatus can be an enhanced radio access network that can identify whether the terminal equipment is an M2M terminal or an H2H terminal according to the terminal equipment type and/or the access capability, and select a corresponding core network to perform the access process.
  • Mode 2 the apparatus can be a virtual gateway logic network element that accomplishes the selection of the core network, wherein the virtual gateway can be integrated into the radio access network, also can be deployed as a separate entity.
  • the apparatus can be a virtual gateway, wherein the virtual gateway serves as a proxy server and is located between the radio access network and the core network; all relevant information of the radio access network is sent to the virtual gateway; and the virtual gateway is adopted to select a corresponding core network and forward signalling.
  • FIG. 6 shows a structure diagram of an apparatus for implementing an access to an M2M core network according to a preferable embodiment of the present invention; as shown in FIG. 6 , different apparatuses are illustrated below.
  • the apparatus is an enhanced radio access network (for example, enhancing an eNodeB in an EPS network, or, enhancing an RNC in a GPRS network)
  • the implementation unit 3 of the apparatus comprises: a first selection module 30 , configured to select a corresponding first core network address for the terminal equipment according to information of a preconfigured corresponding relationship between a terminal equipment identity and the M2M core network; and a first sending module 32 , configured to initiate an access request to the corresponding M2M core network according to the first core network address.
  • the implementation unit 3 of the apparatus comprises: a second selection module 34 , configured to select a corresponding second core network address for the terminal equipment according to information of a preconfigured corresponding relationship between a terminal equipment identity and the M2M core network; a second sending module 36 , configured to send the second core network address to the radio access network; and a first access request module 38 , configured to initiate an access request to the corresponding M2M core network according to the second core network address.
  • the implementation unit 3 of the apparatus comprises: a third selection module 40 , configured to select a corresponding third core network address for the terminal equipment according to information of a preconfigured corresponding relationship between a terminal equipment identity and the M2M core network; and a second access request module 42 , configured to initiate an access request to the corresponding M2M core network according to the third core network address.
  • this apparatus when the apparatus is a virtual gateway, this apparatus is equivalent to a proxy server and forwards a signalling message between the radio access network and the M2M core network. That is, the virtual gateway sends all signalling messages come from the radio access network to the M2M core network, and sends all signalling messages come from the M2M core network to the radio access network.
  • the Mode 1 does not need to make a big change to the original system architecture, only needing to enhance the existing radio access network, wherein the enhanced radio access network can identify whether the terminal equipment is an M2M terminal or an H2H terminal according to the terminal equipment type or/and the access capability, and select a corresponding core network to process.
  • the existing GPRS or EPS network a dedicated M2M core network, which particularly takes charge of the core network functions, such as the access of the M2M terminal, mobility management and bearer establishment, is added.
  • Mode 2 Compared with the Mode 1, the Mode 2 and the Mode 3 make a comparatively big change to the system architecture; and description is provided below in conjunction with embodiments.
  • FIG. 7 shows a diagram of a first architecture of implementing an M2M service by adopting an M2M core network to share a radio access network in a GPRS network according to an embodiment of the present invention.
  • an M2M core network is added, wherein the M2M core network comprises an M-SGSN and an M-GGSN.
  • the function of the M-SGSN is similar to that of the SGSN in the existing network.
  • the M-SGSN also connected with an RNS through an Iu interface, is used for storing routing area location information of a user and taking charge of security and access control.
  • the M-SGSN only takes charge of the M2M service, but not the H2H service; therefore, functions such as mobility management for the H2H terminal are simplified, meanwhile, an enhancement is made to meet the functions of the M2M service, for example, meeting the requirements of functions such as low mobility management of an M2M terminal, identification of an M2M terminal identifier and a group identifier, conduction of a time control on the access, group management of the M2M terminal, satisfaction of the transmission mode of low data amount of the M2M terminal, particular charging requirements and so on.
  • the function of the M-GGSN is similar to that of the GGSN in the existing network.
  • the M-GGSN connected with the M-SGSN through a Gn interface internally, is used for allocating an IP address of a terminal and implementing a gateway function to an external network.
  • the M-GGSN only takes charge of the M2M service, but not the H2H service; therefore, functions such as bearer establishment and charging for the H2H terminal are optimized, meanwhile, an enhancement is made to meet the functions of the M2M service, for example, meeting the requirements of functions such as group charging of the M2M terminal, group policy allocation, group maximum transmission bit rate limit, equipment level of network load control, transmission of low data amount and so on.
  • V-GW Virtual GW
  • the V-GW can judge whether the equipment is M2M equipment according to indications such as an IMSI number segment of the terminal, an MSTSDN number segment, an APN (for example, an MTC UE adopts the full domain name of MTC.TAI.MCC.MNC.3GPP.XXX), the equipment type, the equipment access capability and so on, and then select a corresponding core network address.
  • the V-GW is a logic network element, which can be integrated into the radio access network or can be deployed as a separate network element entity.
  • an MTC UE initiates an attachment request; the V-GW can identify whether the equipment of the MTC UE is H2H equipment or M2M equipment according to the equipment identifier, and thus select a core network address; then the radio access network can send the attachment request to the corresponding core network.
  • FIG. 8 shows a diagram of a second architecture of implementing an M2M service by adopting an M2M core network to share a radio access network in a GPRS network according to an embodiment of the present invention.
  • an M2M core network an M-SGSN and an M-GGSN are added in the existing GPRS network.
  • the functions of the M-SGSN and the M-GGSN are the same as that described in the first architecture, and no further description is needed here.
  • the difference lies in the function of the V-GW.
  • the V-GW is responsible for selecting a core network.
  • the V-GW is located between the radio access network and the core network, only the address of the V-GW is configured in the radio access network, all signalling of the radio access network is forwarded to the core network through the V-GW, and all signalling transmitted from the core network to the radio access network is forwarded to the radio access network through the V-GW too.
  • the V-GW can judge whether a terminal is an M2M terminal or an H2H terminal when the terminal is attached, then the V-GW selects a corresponding core network and forwards all signalling messages, comprising an attachment message, from the radio access network to the selected core network.
  • the V-GW can be integrated into the radio access network to act as a logic function module, also can exist as a separate network element entity.
  • FIG. 9 shows a diagram of a third architecture of implementing an M2M service by adopting an M2M core network to share a radio access network in an EPS network according to an embodiment of the present invention.
  • an M2M core network is added, wherein the M2M core network comprises an M-MME and an M-SGW/M-PGW.
  • the function of the M-MME is similar to that of the MME in the existing EPS network.
  • the M-MME acts as a control plane function entity in the M2M core network and a server for temporarily storing user data, and is responsible for managing and storing a context of a UE (for example, user identifier, mobility management state, user security parameters and the like), allocating a temporary identifier for a user, and authenticating the user when a UE constantly resides in the tracking area or the network.
  • a context of a UE for example, user identifier, mobility management state, user security parameters and the like
  • the M-MME only takes charge of the M2M service, but not the H2H service; therefore, functions such as mobility management for the H2H terminal are simplified, meanwhile, an enhancement is made to meet the functions of the M2M service, for example, meeting the requirements of functions such as low mobility management of an M2M terminal, identification of an M2M terminal identifier and a group identifier, conduction of a time control on the access, group management of the M2M terminal, satisfaction of the transmission mode of low data amount of the M2M terminal, particular charging requirements and so on.
  • functions such as low mobility management of an M2M terminal, identification of an M2M terminal identifier and a group identifier, conduction of a time control on the access, group management of the M2M terminal, satisfaction of the transmission mode of low data amount of the M2M terminal, particular charging requirements and so on.
  • the function of the M-SGW/M-PGW is similar to that of the SGW/PGW in the existing EPS network.
  • the M-SGW acts as a user plane anchor and is responsible for processing data routing of the user plane and terminating downlink data of a UE in an idle (ECM_IDLE) state.
  • the M-PGW acts as a gateway through which the UE accesses the PDN, and is responsible for managing an IP address of a user, storing an SAR bearer context of a UE, and implementing functions such as policy enforcement and charging support.
  • the M-SGW/PGW only takes charge of the M2M service, but not the H2H service; therefore, functions such as bearer establishment and charging for the H2H terminal are optimized, meanwhile, an enhancement is made to meet the functions of the M2M service, for example, meeting the requirements of functions such as group charging of the M2M terminal, group policy allocation, group maximum transmission bit rate limit, equipment level of network load control, transmission of low data amount and so on.
  • V-GW Virtual Gateway
  • the V-GW can judge whether the equipment is M2M equipment according to indications such as an IMSI number segment of the terminal, an MSISDN number segment, an APN (for example, an MTC UE adopts the full domain name of MTC.TAI.MCC.MNC.3GPP.XXX) and so on, and then select a corresponding core network address.
  • the V-GW is a logic network element, which can be integrated into the radio access network or can be deployed as a separate network element entity.
  • an MTC UE initiates an attachment request; the V-GW can identify whether the equipment of the MTC UE is H2H equipment or M2M equipment according to the equipment identifier, and thus select a core network address; then the radio access network can send the attachment request to the corresponding core network.
  • FIG. 10 shows a diagram of a fourth architecture of implementing an M2M service by adopting an M2M core network to share a radio access network in an EPS network according to an embodiment of the present invention.
  • an M2M core network an M-MME and an M-SGW/M-PGW are added in the existing EPS network.
  • the functions of the M-MME and the M-SGW/M-PGW are the same as that described in the third architecture, and no further description is needed here. The difference lies in the function of the V-GW.
  • the V-GW is responsible for selecting a core network.
  • the V-GW is located between the eNodeB in the radio access network and the core network; in the eNodeB, only the address of the V-GW is configured; all signalling of the eNodeB is forwarded to the core network through the V-GW, and all signalling transmitted from the core network to the eNodeB is forwarded to the radio access network through the V-GW too.
  • the V-GW can judge whether a terminal is an M2M terminal or an H2H terminal when the terminal is attached, then the V-GW selects a corresponding core network and forwards all signalling messages, comprising an attachment message, from the radio access network to the selected core network.
  • the V-GW can be integrated into the eNodeB to act as a logic function module, also can exist as a separate network element entity.
  • a method for implementing an access to an M2M core network is provided.
  • FIG. 11 shows a flowchart of a method for implementing an access to an M2M core network according to an embodiment of the present invention. As shown in FIG. 11 , the implementation method comprises the following processing steps (Step 1102 to Step 1106 ):
  • Step 1102 a network element receives an access request message carrying equipment identity indication information, wherein the access request message is initiated by terminal equipment;
  • Step 1104 the network element determines that the terminal equipment is M2M equipment according to the equipment identity indication information.
  • Step 1106 the network element selects a corresponding M2M core network for the terminal equipment to implement the access of the terminal equipment.
  • this method can implement the access of an M2M terminal to the dedicated M2M core network, and the existing network can meet the requirement of the M2M service while still providing services for existing H2H equipment, without any need of enhancement and mass expansion.
  • the network element comprises but is not limited to one of the following: a radio access network and a virtual gateway.
  • the network element can also comprise a server which is able to provide an address of the core network and determine the identity of the terminal equipment.
  • the equipment identity indication information comprises at least one of the following: equipment type information, equipment access capability information and equipment identification information (for example, IMSI, MSISDN and the like).
  • the process of implementing the access of the M2M terminal to the M2M core network by the method above comprises but is not limited to the following three implementation modes.
  • Mode 1 an enhanced radio access network is adopted, wherein the enhanced radio access network is able to identify whether the terminal equipment is an M2M terminal or an H2H terminal according to the terminal equipment type and/or the access capability, and select a corresponding core network to process.
  • Mode 2 a virtual gateway logic network element is adopted to accomplish the selection of the core network, wherein the virtual gateway can be integrated into the radio access network, also can be deployed as a separate entity.
  • Mode 3 the virtual gateway serves as a proxy server and is located between the radio access network and the core network; all relevant information of the radio access network is sent to the virtual gateway; and the virtual gateway is adopted to select a corresponding core network and forward a signalling message.
  • Step 1106 can further comprise the following processes:
  • the radio access network selects a corresponding first core network address for the terminal equipment according to information of a preconfigured corresponding relationship between the terminal equipment identity and the M2M core network;
  • the radio access network initiates an access request to the corresponding M2M core network according to the first core network address.
  • the radio access network needs to be enhanced, so that the radio access network is capable of selecting an existing core network and an M2M core network for the H2H terminal and the M2M terminal respectively. Necessary processes are described below.
  • FIG. 12 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 1 in a GPRS network according to an Embodiment 1 of the present invention.
  • an M2M core network is overlapped in the existing core network to share the existing radio access network.
  • the radio access network can judge whether the access equipment is H2H equipment or M2M equipment according to the terminal equipment type or the access capability, and then select a corresponding core network address to accomplish the subsequent access processes.
  • the access process mainly comprises the following steps (Step 1202 to Step 1212 ).
  • Step 1202 the MTC UE initiates an attachment request message (for example, access request message) to the radio access network, and adds an equipment type indication parameter (that is, equipment type indication information) in the attachment request message through parameter extension.
  • an attachment request message for example, access request message
  • an equipment type indication parameter that is, equipment type indication information
  • the equipment type indication parameter can be the equipment type for indicating whether the equipment is machine type equipment (MTC equipment) or cell phone type equipment (H2H equipment).
  • MTC equipment machine type equipment
  • H2H equipment cell phone type equipment
  • the equipment type can further define different types of machine type equipment or different types of cell phone type equipment, which can be defined according to the requirement of operators.
  • the equipment type of the cell phone type equipment can have a default parameter of null.
  • the equipment type indication parameter also can be the equipment access capability for indicating the machine type communication capability or the cell phone type communication capability, and can be implemented by extending relevant parameters in the field of terminal network capability.
  • the equipment access capability can further define different types of machine type equipment access capabilities or different types of cell phone type access capabilities, which can be defined according to the requirement of operators.
  • the equipment access capability of the cell phone type equipment can have a default parameter of null.
  • Step 1204 the radio access network judges whether the equipment is M2M equipment or H2H equipment according to the equipment information parameter, and then selects a corresponding core network, wherein if the equipment is an H2H equipment terminal, the radio access network selects the existing core network; if the equipment is an M2M equipment terminal, the radio access network selects the M2M core network.
  • Step 1206 the radio access network sends an attachment request to the selected M-SGSN, wherein the attachment request carries important information such as the address of the radio access network, the identifier of the UE, the equipment type of the UE and so on.
  • Step S 1208 after receiving the attachment request of the MTC UE, the M2M core network requests authentication data from an HLR to authenticate the MTC UE, then initiates a location update request to the HLR and downloads user subscription data from the HLR; if the MTC UE has no problems such as access limit, the M2M core network allows the attachment of the MTC UE and performs the subsequent attachment procedure (for example, the M-SGSN can apply to the M-GGSN for operations such as establishment of a PDP context).
  • Step 1210 the M2M core network allows the access of the MTC UE and returns an attachment accepted message to the radio access network.
  • Step 1212 the radio access network returns the attachment accepted message to the MTC UE to notify that the MTC UE has been attached to the GPRS network.
  • FIG. 13 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 1 in an EPS network according to an Embodiment 2 of the present invention.
  • an M2M core network is overlapped in the existing core network to share the existing radio access network.
  • the radio access network can judge whether the access equipment is H2H equipment or M2M equipment according to the terminal equipment type and/or the access capability, and then select a corresponding core network address to accomplish the subsequent access processes.
  • the above process mainly comprises the following steps (Step 1302 to Step 1312 ).
  • Step 1302 in order to access the EPS network, the UE initiates a network attachment request message to an eNodeB, wherein the request message carries equipment type indication information (equipment type indication parameters) such as IMSI, equipment type indication, network access capability of the UE and indication of requesting allocation of IP.
  • equipment type indication information equipment type indication parameters
  • the equipment type indication parameter can be the equipment type for indicating whether the equipment is machine type equipment (MTC equipment) or cell phone type equipment (H2H equipment).
  • MTC equipment machine type equipment
  • H2H equipment cell phone type equipment
  • the equipment type can further define different types of machine type equipment or different types of cell phone type equipment, which can be defined according to the requirement of operators.
  • the equipment type of the cell phone type equipment can have a default parameter of null.
  • the equipment type indication parameter also can be the equipment access capability for indicating the machine type communication capability or the cell phone type communication capability, and can be implemented by extending relevant parameters in the field of terminal network capability.
  • the equipment access capability can further define different types of machine type equipment access capabilities or different types of cell phone type access capabilities, which can be defined according to the requirement of operators.
  • the equipment access capability of the cell phone type equipment can have a default parameter of null.
  • Step 1304 the eNodeB needs to select for the UE one core network serving the UE.
  • the eNodeB judges whether the equipment is M2M equipment or H2H equipment according to the equipment information parameters and then selects a corresponding core network, wherein if the equipment is an H2H equipment terminal, the radio access network selects the MME in the existing core network; if the equipment is an M2M equipment terminal, the radio access network selects the M-MME in the M2M core network.
  • Step 1306 after selecting for the UE one M-MME serving the UE, the eNodeB forwards the attachment request to the MME, and meanwhile carries important information, such as the access address of the eNodeB, the identifier of the UE, the equipment type of the UE and so on, to the M-MME.
  • Step 1308 after receiving the attachment request of the MTC UE, the M-MME would request authentication data from an HSS to authenticate the MTC UE. Then the M-MME initiates a location update request to the HSS and downloads user subscription data from the HSS; if the MTC UE has no problems such as access limit, the M-MME allows the attachment of the MTC UE, performs the subsequent attachment procedure and notifies an M-SGW/M-PGW to establish one EPS default bearer for the MTC UE.
  • Step 1310 the M-MME in the M2M core network sends an attachment accepted response to the eNodeB, indicating that the request of the UE for attaching to the network has been accepted, wherein the response carries the address of the Serving GW and a Tunnel Endpoint Identifier (TEID).
  • TEID Tunnel Endpoint Identifier
  • Step 1312 the eNodeB sends a voice bearer establishment request to the UE, requiring the UE to store the important information of the bearer establishment and open a corresponding port. After receiving a radio bearer establishment response from the MTC UE, the eNodeB notifies the MME that the attachment procedure is completed.
  • FIG. 12 and FIG. 13 are only described by taking an attachment (access) process for example and can be applied to other service processes if no conflict is caused.
  • an M2M core network is overlapped in the existing core network to share the existing radio access network.
  • the radio access network can judge whether the access equipment is H2H equipment or M2M equipment according to the terminal equipment type or the access capability, and then select a corresponding core network address to accomplish the subsequent access processes, thereby achieving the effect of occupying no existing core network resources and optimizing the network flow, and meeting the requirement of M2M application.
  • Step 1106 can further comprise the following processes:
  • the virtual gateway selects a corresponding second core network address for the terminal equipment according to information of a preconfigured corresponding relationship between the terminal equipment identity and the M2M core network;
  • the radio access network requests the second core network address from the virtual gateway, after receiving the access request message from the terminal equipment;
  • the virtual gateway sends the second core network address to the radio access network
  • the radio access network initiates an access request to the corresponding M2M core network according to the second core network address.
  • FIG. 14 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 2 in a GPRS network according to an Embodiment 3 of the present invention.
  • an M2M core network is overlapped in the existing core network to share the existing radio access network.
  • the radio access network inquires the access address of the core network from the V-GW; the V-GW can judge whether the equipment is H2H equipment or M2M equipment according to relevant information carried by the terminal, such as IMSI, MSISDN, APN, equipment type, access capability and other indications, and then select a corresponding core network address (that is, the second core network address) to accomplish the subsequent access processes.
  • the above process mainly comprises the following steps (Step 1402 to Step 1412 ).
  • Step 1402 the MTC UE initiates an attachment request message (access request message) to the radio access network, wherein the attachment request message needs to carry the identifier of the MTC UE, for example, IMSI, MSISDN and the like.
  • Equipment information parameters also can be added in the attachment request message through parameter extension.
  • Step 1404 if the V-GW is integrated into the radio access network, the V-GW judges whether the equipment is M2M equipment or H2H equipment according to indications, carried in the attachment message, such as the identifier of the MTC UE (for example, IMSI and/or MSISDN), the equipment type and the access capability in the equipment information parameters, and then selects a corresponding core network. If the equipment is an H2H equipment terminal, the V-GW selects and provides the address of the existing core network to the radio access network; if the equipment is an M2M equipment terminal, the V-GW selects and provides the M2M core network to the radio access network.
  • the equipment is an H2H equipment terminal
  • the V-GW selects and provides the address of the existing core network to the radio access network
  • the equipment is an M2M equipment terminal
  • the V-GW selects and provides the M2M core network to the radio access network.
  • the radio access network initiates an addressing request to the V-GW after receiving the attachment request of the MTC UE, wherein the addressing request carries relevant information of the UE (for example, indications such as the identifier of the UE, the equipment type information of the UE and so on).
  • the V-GW judges whether the equipment is M2M equipment or H2H equipment according to indications, carried in the addressing request, such as the identifier of the MTC UE (for example, IMSI and/or MSISDN), the equipment type and the access capability in the equipment information parameters, and then selects a corresponding core network.
  • the V-GW selects and provides the address of the existing core network to the radio access network; if the equipment is an M2M equipment terminal, the V-GW selects and provides the M2M core network to the radio access network; then the V-GW returns the selected core network address to the radio access network.
  • Step 1406 the radio access network sends the attachment request to the selected M-SGSN, wherein the attachment request carries important information such as the address of the radio access network, the identifier information of the UE, the equipment type of the UE and so on.
  • Step 1408 after receiving the attachment request of the MTC UE, the M2M core network requests authentication data from an HLR to authenticate the MTC UE, then initiates a location update request to the HLR and downloads user subscription data from the HLR; if the MTC UE has no problems such as access limit, the M2M core network allows the attachment of the MTC UE and performs the subsequent attachment procedure, for example, the M-SGSN can apply to an M-GGSN for operations such as establishment of a PDP context.
  • Step 1410 the M2M core network allows the access of the MTC UE and returns an attachment accepted message to the radio access network.
  • Step 1412 the radio access network returns the attachment accepted message to the MTC UE to notify that the MTC UE has been attached to the GPRS network.
  • FIG. 15 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 2 in an EPS network according to an Embodiment 4 of the present invention.
  • an M2M core network is overlapped in the existing core network to share the existing radio access network.
  • the eNodeB in the radio access network inquires the access address of the core network from the V-GW; the V-GW can judge whether the equipment is H2H equipment or M2M equipment according to relevant information carried by the terminal (for example, indications such as IMSI, MSISDN, APN, equipment type and access capability and so on), and then select a corresponding core network address to accomplish the subsequent access processes.
  • the above process comprises the following steps (Step 1502 to Step 1512 ).
  • Step 1502 in order to access the EPS network, the UE initiates a network attachment request to the eNodeB, wherein the attachment request carries information such as IMSI, APN, equipment type indication, network access capability of the UE, indication of requesting allocation of IP and so on.
  • the attachment request carries information such as IMSI, APN, equipment type indication, network access capability of the UE, indication of requesting allocation of IP and so on.
  • Step 1504 the eNodeB needs to select for the UE one core network serving the UE. If the V-GW is integrated into the eNodeB, the V-GW judges whether the equipment is M2M equipment or H2H equipment according to indications, carried in the attachment message, such as the identifier of the MTC UE (for example, IMSI and/or MSISDN) or the APN, or the equipment type and the access capability in the equipment information parameters, and then selects a corresponding core network.
  • the attachment message such as the identifier of the MTC UE (for example, IMSI and/or MSISDN) or the APN, or the equipment type and the access capability in the equipment information parameters.
  • the V-GW selects and provides the MME address of the existing core network to the eNodeB in the radio access network; if the equipment is an M2M equipment terminal, the V-GW selects and provides the M-MME address of the M2M core network to the eNodeB in the radio access network.
  • the eNodeB initiates an addressing request to the V-GW after receiving the attachment request of the MTC UE, wherein the addressing request carries relevant information of the UE (for example, indications such as the identifier of the UE, APN, the equipment information of the UE and so on).
  • the V-GW judges whether the equipment is M2M equipment or H2H equipment according to indications, carried in the addressing message, such as the identifier of the MTC UE (for example, IMSI and/or MSISDN), the APN, the equipment type and the access capability in the equipment information parameters, and then selects a corresponding core network. If the equipment is an H2H equipment terminal, the V-GW selects and provides the MME address of the existing core network to the eNodeB; if the equipment is an M2M equipment terminal, the V-GW selects and provides the M-MME address of the M2M core network to the eNodeB. The V-GW returns the selected core network address to the eNodeB.
  • Step 1506 after selecting for the MTC UE one M-MME serving the UE, the eNodeB forwards the attachment request to the M-MME, and meanwhile carries important information, such as the access address of the eNodeB, the identifier of the UE and so on, to the M-MME.
  • Step 1508 after receiving the attachment request of the MTC UE, the M-MME requests authentication data from an HSS to authenticate the MTC UE. Then, the M-MME initiates a location update request to the HSS and downloads user subscription data from the HSS; if the MTC UE has no problems such as access limit, the M-MME allows the attachment of the MTC UE, performs the subsequent attachment procedure and notifies an M-SGW/M-PGW to establish one EPS default bearer for the MTC UE.
  • Step 1510 the M-MME in the M2M core network sends an attachment accepted response to the eNodeB, indicating that the request of the UE for attaching to the network has been accepted, wherein the response carries the address of the Serving GW and a TEID.
  • Step 1512 the eNodeB sends a voice bearer establishment request to the UE, requiring the UE to store the important information of the bearer establishment and open a corresponding port. After receiving a radio bearer establishment response from the MTC UE, the eNodeB notifies the MME that the attachment procedure is completed.
  • FIG. 14 and FIG. 15 are only described by taking an attachment (access) process for example and can be applied to other service flow if no conflict is caused.
  • an M2M core network is overlapped in the existing core network to share the existing radio access network.
  • the eNodeB in the radio access network inquires the access address of the core network from the V-GW, judges whether the access equipment is H2H equipment or M2M equipment according to relevant information carried by the terminal (for example, indications such as IMSI, MSISDN, APN, equipment type and access capability and so on), and then selects a corresponding core network address to accomplish the subsequent access processes, thereby achieving the effect of occupying no existing core network resources and optimizing the network flow, and meeting the requirement of M2M applications.
  • Step 1106 can further comprise the following processes:
  • the virtual gateway selects a corresponding third core network address for the terminal equipment according to information of a preconfigured corresponding relationship between the terminal equipment identity and the M2M core network;
  • the virtual gateway initiates an access request to the corresponding M2M core network according to the third core network address.
  • the virtual gateway receives an access accepted response from the M2M core network; the virtual gateway returns the access accepted response to the radio access network; and the virtual gateway forwards a subsequent signaling message interacted between the radio access network and the M2M core network.
  • the V-GW needs to have a capability of distinguishing the H2H terminal from the M2M terminal and selecting a corresponding core network address (that is, the third core network address).
  • the V-GW is equivalent to a core network configured inside the radio access network; all signaling needing to be transmitted to the core network from the radio access network is directly transmitted to the V-GW, which then forwards the signaling to the corresponding core network.
  • the V-GW is equivalent to a radio access network; all signaling needing to be transmitted to the radio access network from the core network is directly transmitted to the V-GW, which then forwards the signaling to the corresponding radio access network. Necessary processes are described below.
  • FIG. 16 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 3 in a GPRS network according to an Embodiment 5 of the present invention.
  • an M2M core network is overlapped in the existing core network to share the existing radio access network.
  • the radio access network After receiving an attachment request from the MTC UE, the radio access network forwards the attachment request to a V-GW; the V-GW can judge whether the equipment is H2H equipment or M2M equipment according to relevant information carried by the terminal (for example, indications such as IMSI, MSISDN, APN, equipment type, access capability and so on), and then select a corresponding core network address and send the attachment request to the selected core network.
  • the core network After completing the attachment related process of the MTC UE, the core network sends an attachment accepted message to the V-GW which then forwards the attachment accepted message to the radio access network to accomplish the subsequent access processes.
  • the specific process above can further comprise the following steps (Step 1602 to Step 1616 ).
  • Step 1602 the MTC UE initiates an attachment request message to the radio access network, wherein the attachment message needs to carry the identifier of the MTC UE (for example, IMSI, MSISDN and the like).
  • Equipment information parameters can also be added in the attachment request message through parameter extension.
  • Step 1604 the radio access network selects for the MTC UE one V-GW serving the MTC UE and forwards the attachment request to the V-GW.
  • the V-GW can be integrated with the radio access network physically, also can be configured as a separate physical entity.
  • Step 1606 the V-GW judges whether the equipment is M2M equipment or H2H equipment according to indications, carried in the attachment message, such as the identifier of the MTC UE (for example, IMSI and/or MSISDN), the equipment type and the access capability in the equipment information parameters, and then selects a corresponding core network. If the equipment is an H2H equipment terminal, the V-GW selects the address of the existing core network; if the equipment is an M2M equipment terminal, the V-GW selects the M2M core network address.
  • the MTC UE for example, IMSI and/or MSISDN
  • Step 1608 the V-GW selects for the MTC UE one M2M core network serving the MTC UE and then sends the attachment request to a selected M-SGSN, wherein the attachment request carries important information such as the address of the V-GW, the identifier of the UE, the equipment type of the UE and so on.
  • Step 1610 after receiving the attachment request of the MTC UE, the M2M core network would request authentication data from an HLR to authenticate the MTC UE. Then, the M2M core network initiates a location update request to the HLR and downloads user subscription data from the HLR; if the MTC UE has no problems such as access limit, the M2M core network allows the attachment of the MTC UE and performs the subsequent attachment procedure (for example, the M-SGSN can apply to the M-GGSN for operations such as the establishment of a PDP context).
  • the M-SGSN can apply to the M-GGSN for operations such as the establishment of a PDP context.
  • Step 1612 the M2M core network allows the access of the MTC UE and returns an attachment accepted message to the V-GW.
  • Step 1614 the V-GW forwards the attachment accepted message to the radio access network.
  • Step 1616 the radio access network returns the attachment accepted message to the MTC UE to notify that the MTC UE has been attached to the GPRS network.
  • FIG. 17 shows a flowchart of an MTC UE performing an attachment procedure to an M2M core network through an existing radio access network by adopting Mode 3 in an EPS network according to an Embodiment 6 of the present invention.
  • an M2M core network is overlapped in the existing core network to share the eNodeB in the existing radio access network.
  • the eNodeB After receiving an attachment request from the MTC UE, the eNodeB forwards the attachment request to a V-GW; then the V-GW can judge whether the equipment is H2H equipment or M2M equipment according to relevant information carried by the terminal (for example, indications such as IMSI, MSISDN, APN, equipment type, access capability and so on), and then select a corresponding core network address and send the attachment request to the selected core network.
  • the core network sends an attachment accepted message to the V-GW which then forwards the attachment accepted message to the eNodeB in the radio access network to accomplish the subsequent access processes.
  • the specific process above can further comprise the following steps (Step 1702 to Step 1716 ).
  • Step 1702 in order to access the EPS network, the UE initiates a network attachment request message to the eNodeB, wherein the request message carries information such as IMSI, APN, equipment type indication, network access capability of the UE, indication of requesting allocation of IP and so on.
  • the request message carries information such as IMSI, APN, equipment type indication, network access capability of the UE, indication of requesting allocation of IP and so on.
  • Step 1704 the eNodeB selects for the MTC UE one V-GW serving the MTC UE and forwards the attachment request to the V-GW.
  • the V-GW can be integrated with the radio access network physically, also can be configured as a separate physical entity, namely, an independent network element located outside the radio access network.
  • Step 1706 the V-GW judges whether the equipment is M2M equipment or H2H equipment according to information, carried in the attachment message, such as the identifier of the MTC UE (for example, IMSI and/or MSISDN), or the APN, or indications such as the equipment type and the access capability in the equipment information parameters, and then selects a corresponding core network. If the equipment is an H2H equipment terminal, the V-GW selects the MME address of the existing core network; if the equipment is an M2M equipment terminal, the V-GW selects the M-MME address of the M2M core network address.
  • information carried in the attachment message, such as the identifier of the MTC UE (for example, IMSI and/or MSISDN), or the APN, or indications such as the equipment type and the access capability in the equipment information parameters.
  • Step 1708 the V-GW selects for the MTC UE one M-MME serving the MTC UE and then forwards the attachment request to the MME, and meanwhile carries important information, such as the access address of the V-GW, the identifier of the UE and so on, to the MME.
  • Step 1710 after receiving the attachment request of the MTC UE, the M-MME requests authentication data from an HSS to authenticate the MTC UE. Then, the M-MME initiates a location update request to the HSS and downloads user subscription data from the HSS; if the MTC UE has no problems such as access limit, the M-MME allows the attachment of the MTC UE, performs the subsequent attachment procedure and notifies an M-SGW/M-PGW to establish one EPS default bearer for the MTC UE.
  • Step 1712 the M-MME in the M2M core network sends an attachment accepted response to the V-GW, indicating that the request of the UE for attaching to the network has been accepted, wherein the response carries the address of the Serving GW and a TEID.
  • Step 1714 the V-GW forwards the attachment accepted message to the eNodeB in the radio access network.
  • Step 1716 after receiving the attachment accepted response, the eNodeB sends a voice bearer establishment request to the UE, requiring the UE to store the important information of the bearer establishment and open a corresponding port. After receiving a radio bearer establishment response from the MTC UE, the eNodeB notifies the MME that the attachment procedure is completed.
  • FIG. 16 and FIG. 17 are only described by taking an attachment (access) process for example and can be applied to other service flow if no conflict is caused.
  • the V-GW located between the radio access network and the core network, is used for forwarding related signalling information.
  • an M2M core network is overlapped in the existing core network to share the existing radio access network.
  • the radio access network forwards the attachment request to a V-GW; then the V-GW can judge whether the equipment is H2H equipment or M2M equipment according to relevant information carried by the terminal (for example, IMSI, MSISDN, APN, indications such as equipment type, access capability and so on), and then select a corresponding core network address and send the attachment request to the selected core network.
  • the core network After completing the attachment related process of the MTC UE, the core network sends an attachment accepted message to the V-GW which then forwards the attachment accepted message to the eNodeB in the radio access network, to accomplish the subsequent access processes.
  • the network operator can deploy a dedicated M2M core network to meet the requirements of the M2M services.
  • the radio access network can identify the M2M terminal according to the equipment type or/and the access capability and select a corresponding M2M core network.
  • the radio access network also can identify the M2M terminal and select a corresponding M2M core network through the virtual gateway, thereby achieving the effect of occupying no existing core network resources and optimizing the network flow, and meeting the requirement of M2M applications.
  • modules and steps of the present invention can be realized by using general purpose calculating device, can be integrated in one calculating device or distributed on a network which consists of a plurality of calculating devices.
  • the modules and the steps of the present invention can be realized by using the executable program code of the calculating device. Consequently, they can be stored in the storing device and executed by the calculating device, or they are made into integrated circuit module respectively, or a plurality of modules or steps thereof are made into one integrated circuit module. In this way, the present invention is not restricted to any particular hardware and software combination.

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