WO2011047589A1

WO2011047589A1 - Method and apparatus for establishing network connection, method and system for making policy and charging control (pcc) strategy

Info

Publication number: WO2011047589A1
Application number: PCT/CN2010/077185
Authority: WO
Inventors: 朱春晖; 宗在峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-10-19
Filing date: 2010-09-21
Publication date: 2011-04-28
Also published as: CN102045867B; CN102045867A

Abstract

A method and an apparatus for establishing network connection, and a method and a system for making Policy and Charging Control (PCC) strategy are disclosed by the present invention. The method for establishing network connection includes that a network side receives an access request initiated by a user equipment, wherein the access request carries a group-id indicating the group which the user equipment belongs to; when it is necessary to establish a bearer between a first network element and a second network element for the user equipment, the network side judges whether there currently exists a group bearer corresponding to the group-id between the first network element and the second network element, and if yes, the network side binds the data of the user equipment with the group bearer, otherwise, the network side establishes a group bearer between the first network element and the second network element for the group which the user equipment belongs to, and records the group bearer as the group bearer corresponding to the group-id between the first network element and the second network element. According to the present invention, the occupation of network resources can be reduced, and the utilization ratio of the network resources can be improved.

Description

TECHNICAL FIELD The present invention relates to the field of mobile communications technologies, and in particular, to a network connection establishment method and apparatus, and a Policy and Charging Control (PCC) policy. Develop methods and systems. Background technique

The 3GPP wireless core network includes a General Packet Radio Service (GPRS) network, a System Architecture Evolution (SAE) network, and a Universal Mobile Telecommunications System (UMTS). The SAE may also be referred to as an Evolved Packet System (EPS). FIG. 1 is a schematic diagram of an emergency call of a User Equipment (UE) for accessing an IP Multimedia Subsystem (IMS) through SAE and UMTS. In FIG. 1, a solid line indicates signaling. The dotted line indicates the user's IP channel. When accessed through UMTS, the UE may also be referred to as a mobile station (Mobile Station, abbreviated as MS). As shown in Figure 1, the main network elements involved in the UE's access to the Machine Type Communication (MTC) server (MTC Server) through the SAE or UMTS include: the network element of the SAE network part, and the UMTS network. Part of the network element and the MTC Server. In this case, the UE may also be called an MTC device. The network element of the SAE network part is mainly used to provide bearer management and mobility management. The network elements of the SAE network part include: an enhanced wireless base station (eNodeB), a Mobility Management Entity (abbreviated as ΜΜΕ), and a user plane data processing processing network element (SAE GW); the SAE GW includes a packet data network gateway. (Packet Data Network Gateway, abbreviated as P-GW) and Monthly Service Gateway (Serving GW, S-GW for short); MME is responsible for managing and storing the context of the UE (for example, UE identity/user identity, mobility management ^ I State, user security parameters, etc.), assign a temporary identifier to the user, and when the UE is camped in the tracking area or the network, it is responsible for authenticating the UE. eNodeB access is also known as Long Term Evolution (Long Term Evolution, referred to as LTE) access. The Policy and Charging Rules Function (PCRF) is an important functional entity of the Policy and Charging Control (PCC) architecture to control the Internet Protocol-Connected Access Network ( IP-Connectivity Access Network (IP-CAN for short)) Acquisition, assembly, and delivery of policy and accounting rules. In a specific application, the IP-CAN can be a collection of devices and interfaces in an EPS or UMTS network.

The P-GW is a mobility anchor in the SAE system. It is a border gateway between the SAE and the Packet Data Network (PDN). It is responsible for PDN access and forwarding data between the SAE and the PDN.

The UMTS network is mainly composed of a 3GPP radio access network (GSM EDGE Radio Access Network/UMTS Terrestrial Radio Access Network, GERAN/UTRAN, collectively referred to as RAN), a Serving GPRS Support Node (SGSN), and a gateway GPRS support node. (Gateway GPRS Support Node, abbreviated as GGSN). 2 is a schematic diagram of signaling of an MTC device (terminal) accessing an MTC server in the prior art. In actual use, the number of MTC devices is large. Although the data volume of these terminals is very low, only occasionally Some burst data is generated, but these terminals still need to be online for a long time. Therefore, in the prior art, a single bearer needs to be established for each MTC device, which will occupy a large amount of network resources, and the amount of data transmitted by each bearer is small. Therefore, the utilization of network resources is low, resulting in waste of network resources. SUMMARY OF THE INVENTION In view of the above, the present invention provides an improved network connection establishment solution, which is used to solve the problem of low network resource utilization caused by establishing a single bearer for each MTC device in the prior art, thereby causing network resources. The problem of wasting. According to an aspect of the present invention, a network connection establishing method is provided. The method for establishing a network connection according to the present invention includes: receiving, by the network side, an access request initiated by a user equipment, where the access request carries a group identifier indicating a group to which the user equipment belongs; In the case that the second network element is carried, it is determined whether there is a group bearer corresponding to the group identifier between the first network element and the second network element. If yes, the data of the user equipment is tied to the group of bearers. Otherwise, the group bearer between the first network element and the second network element is established for the group to which the user equipment belongs, and the group bearer is recorded as corresponding to the group identifier between the first network element and the second network element. The group is loaded. According to another aspect of the present invention, a network connection establishing apparatus is provided. The network connection establishing apparatus according to the present invention comprises: a receiving module, a determining module, a bearer establishing module, a recording module, and a binding module. The receiving module is configured to receive an access request initiated by the user equipment, where the access request carries a group identifier indicating a group to which the user equipment belongs; the determining module is configured to establish a first network element and the user equipment In the case of the bearer between the two network elements, it is determined whether there is a group bearer corresponding to the group identifier between the first network element and the second network element; the bearer establishing module is configured to be used when the judgment result of the determining module is negative. And establishing a group bearer between the first network element and the second network element for the group to which the user equipment belongs; the recording module, configured to record the group bearer established by the bearer establishing module as the first network element and the second network element The group identifier corresponds to the group; the binding module is configured to bind the data of the user equipment to the group bearer if the judgment result of the determining module is yes. According to still another aspect of the present invention, a PCC policy formulation method is provided for formulating a PCC policy based on a group bearer. The PCC policy-making method according to the present invention includes: after receiving the session request for the group to which the first user equipment belongs, the P-GW sends a setup group bearer indication to the policy and charging rule function PCRF, where the group bearer is established. The indication carries the group identifier of the first user equipment; the PCRF receives the establishment group indication, and obtains the group subscription information corresponding to the group identifier through the user subscription database (SPR); the PCRF group subscription information and the local configuration information formulation and the group identifier Corresponding group PCC policy. According to still another aspect of the present invention, a PCC policy making system is provided. The PCC policy making system according to the present invention includes: P-GW, SPR, and PCRF, where

a P-GW, configured to send a setup group bearer indication to the PCRF after receiving the session request for establishing the group bearer for the group to which the first user equipment belongs, where the group bearer indication carries the group identifier of the first user equipment; The group identifier of each group in the storage network and the group subscription information of the group; the PCRF is configured to receive the group bearer indication, and obtain the group subscription information corresponding to the group identifier carried in the group bearer indication by using the SPR, and The group subscription information and the local configuration information, and the PCC policy of the group corresponding to the group identifier is formulated. With the above at least one solution of the present invention, by grouping user equipments, a group bearer is established between two network elements that need to establish a bearer, so that user equipments of the same group share the group bearer, thereby reducing network resources. Occupation, improve the utilization of network resources. Other features and advantages of the invention will be set forth in the description which follows, and The objectives and other advantages of the invention will be realized and attained by the <RTI The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. 1 is a schematic diagram of an emergency call for a UE to access an IMS through an SAE and a UMTS in the related art; FIG. 2 is a schematic diagram of signaling of an MTC device accessing an MTC server in the prior art; FIG. 3 is a schematic diagram of implementing an MTC server according to the present invention; FIG. 4A is a schematic diagram of signaling of an MTC device accessing an MTC server according to an embodiment of the present invention; FIG. 4B is another MTC device accessing an MTC server according to an embodiment of the present invention; FIG. 4C is a schematic diagram of signaling of an MTC device accessing an MTC server according to an embodiment of the present invention; FIG. 5 is a flowchart of Embodiment 1; FIG. 6 is a flowchart of Embodiment 2; FIG. 8 is a schematic structural diagram of a network connection establishing apparatus according to an embodiment of the present invention; FIG. 9 is a flowchart of a PCC policy making method according to an embodiment of the present invention; FIG. 10 is a fourth embodiment; Figure 11 is a flow chart of the fifth embodiment; FIG. 12 is a schematic structural diagram of a PCC policy making system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the prior art, each MTC device needs to establish a separate bearer. In the case that the number of MTC devices is large, a large amount of network resources are occupied. To solve this problem, an embodiment of the present invention provides an improved network. How to establish a connection. In the embodiment of the present invention, the MTC devices are grouped, and the MTC devices belonging to the same group under the same base station share one S1-U tunnel, and the MTC devices belonging to the same group under the same SGW-PGW share one. On an S5/S8 tunnel, an MPC device belonging to the same group in the same PGW shares an IPSec tunnel. The preferred embodiments of the present invention are described in the following with reference to the accompanying drawings, which are intended to illustrate and illustrate the invention. In the following description, numerous specific details are set forth However, it is apparent that the present invention may be practiced without these specific details. Further, in the case of no conflict, that is, without departing from the spirit and scope of the appended claims, the following embodiments Various details in the embodiments can be made in various combinations. According to an embodiment of the present invention, a network connection establishment method is first provided. FIG. 3 is a flowchart of a method for establishing a network connection according to an embodiment of the present invention. As shown in FIG. 3, the network connection establishing method according to the embodiment of the present invention mainly includes the following steps (step S101 - step S107) Step S101: The network side receives an access request initiated by the user equipment, where the access request carries a group identifier indicating a group to which the user equipment belongs. In a specific implementation process, when the user equipment needs to access the network, The access request needs to be initiated. Specifically, the access request may be an attach request initiated by the user equipment when initially accessing, or may be a handover request initiated when the handover is initiated. The user equipment may indicate the group to which the user equipment belongs by carrying the identity identifier (such as the IMSI) of the user equipment. After receiving the identity identifier of the user equipment, the network side may analyze the group identifier of the group to which the user equipment belongs. Alternatively, the user equipment may also identify the group identifier of the group to which the user equipment belongs by carrying the access point name (Access Point Name, APN for short) in the access request. In addition, the user equipment may be grouped in advance. And set one for each group A unique identifier, the user equipment can also indicate the group identifier of the group to which it belongs by specifying the identifier set for its own group. Step S103: If it is required to establish a bearer between the first network element and the second network element for the user equipment, determine whether there is currently a group identifier corresponding to the user equipment between the first network element and the second network element. The group bearer, if yes, step S105 is performed, otherwise, step S107 is performed; in a specific implementation process, for the network side, as shown in FIG. 2, when the UE accesses, the base station (eNodeB) and the S - The bearer needs to establish a bearer (S1-U tunnel), and the bearer (S5/S8 tunnel) needs to be established between the S-GW and the P-GW, and the P-GW needs to be established for the MTC device to access the MTC server. An IPSec tunnel with the MTC server. Step 4: S: The data of the user equipment is bound to the group bearer that is currently associated with the group identifier; the first network element and the second network element have a group identifier corresponding to the user equipment. When the group 7 is loaded, the data of the user equipment is bound to the group of bearers, and the uplink and downlink data of the user equipment is transmitted through the tunnel carried by the group. Specifically, for the user equipment in the same base station, the bearer binding mechanism is: mapping multiple air interface bearers to one S1-U tunnel, and in the downlink direction, the eNodeB can distinguish different by the target IP address of the packet header. Downstream wireless 7 years. For the user equipments belonging to the same group in the same SGW-PGW, the bearer binding mechanism of the S-GW is as follows: In the uplink direction, the group identifier is used, and the different groups on the S1-U interface belong to the same group. The bearer is set up and the bearer is established and bound between the SGW and the PGW. In the downlink direction, the IP address of the user equipment is bound to the tunnel on the S1-U, and the data packet is sent according to the destination IP address of the downlink data packet. Give the tunnel on S 1 -U. Step S107: Establish a group carrier between the first network element and the second network element for the group to which the user equipment belongs, and record the group record as the group identifier between the first network element and the second network element. The corresponding group is hosted. The following describes the establishment of the group by taking the first network element as the base station, the second network element as the S-GW, and the first network element as the S-GW and the second network element as the P-GW. The first network element is a base station, and the second network element is a S-GW. Specifically, in this case, the establishment of the group 7 may include the following steps: Step 1: When the user equipment needs to access the network, initiate an access request, and the base station forwards the received access request to the MME; The request carries the user equipment identity (such as the IMSI), and the user equipment also needs to provide the MME with the information of the group to which the user belongs. Specifically, the MME can obtain the group to which the user equipment belongs by analyzing the IMSI of the user equipment. The information, or the user equipment carries the group identifier in the initiated access request, where the group identifier may be an APN or a preset group identifier (Group ID); Step 2, the MME initiates a session establishment with the selected S-GW. The request, where the setup session request carries the group identifier, requesting the S-GW to establish a group bearer for the group to which the user equipment belongs; Step 3, the S-GW receives the setup session request, between the base station and the S-GW A group is created for the group to which the user equipment belongs, and the group-mounted tunnel identifier is assigned. In the specific implementation process, after establishing the group bearer, the S-GW will continue to send a setup session request to the P-GW to request the P-GW to establish a bearer between the S-GW and the P-GW. And the S-GW may carry the group identifier in the setup session request, to request the P-GW to establish a group corresponding to the group identifier between the S-GW and the P-GW, and the specific process is described in the following description; After establishing the bearer between the S-GW and the P-GW, the GW returns a setup session reply to the S-GW, where the setup session reply carries the IP address assigned by the P-GW to the user equipment, and if P- The GW establishes a group bearer between the S-GW and the P-GW, and the setup session reply further carries the group tunnel identifier assigned by the P-GW to the group to which the user equipment belongs; the S-GW receives the establishment session reply After the MME sends a setup session reply, the setup session reply carries the IP address allocated by the P-GW to the user equipment. After receiving the setup session reply, the MME sends a message to the base station, where the message carries the S- The GW is the group tunnel identifier assigned to the group to which the user equipment belongs. The first network element is the S-GW, and the second network element is the P-GW. In this case, the group between the first network element and the second network element can be established by the following method: Step 1 After receiving the access request initiated by the user equipment, the P-GW initiates a session establishment request, where the setup session request carries the group identifier of the group to which the user equipment belongs, and requests the P-GW to establish the S-GW and the P-GW. a group bearer corresponding to the group identifier; In a specific implementation process, the S-GW may send the session establishment request to the P-GW after the MME receives the setup session request sent after the access request forwarded by the base station. Step 2: The P-GW receives the setup session request, and establishes a group bearer between the S-GW and the P-GW for the group to which the user equipment belongs, and allocates the group-mounted tunnel identifier. And after the group bearer is established for the group to which the user equipment belongs, the P-GW may send a setup session reply to the S-GW, where the setup session reply carries the group 7 tunnel identifier assigned to the group to which the user equipment belongs. In addition, if the user equipment is an MTC device, and the MTC device requests to access the MTC server, after establishing a group bearer for the group to which the user equipment belongs, the P-GW may also initiate a tunnel establishment request to the MTC server, requesting to establish a P-GW and a tunnel between the MTC servers, where the tunnel establishment request carries a group identifier; the MTC server receives the tunnel establishment request, establishes a tunnel between the P-GW and the MTC server, and returns the same to the P-GW. Tunnel identifier of the tunnel; The P-GW saves the mapping relationship between the tunnel identifier and the group identifier. The P-GW or the MTC server selects the uplink and downlink data of the user equipment in the group corresponding to the group identifier between the P-GW and the MTC server. The tunnel corresponding to the tunnel identifier performs uplink and downlink data transmission. Through the above steps, the MTC devices belonging to the same group under one P-GW share a Group BEARER: P-GW "-" M2M SERVER. The PGW initiates the establishment of a tunnel, which can be an IPSec tunnel. In the uplink direction, all the data of the MTC devices belonging to the same group are aggregated into the tunnel and sent by the P-GW to the MTC Server. In the downlink direction, the IP address of the MTC device is used. Bind to the tunnel on S5 to send the packet to the tunnel on S5 according to the destination IP address of the downstream packet. According to the network connection method provided by the embodiment of the present invention, for the same group of user equipments in the same base station, as shown in FIG. 4A, the group of user equipments share an S1-U tunnel, an S5/S8 tunnel, and an IPSec tunnel; The same group of user equipments of different base stations but under the same S-GW, as shown in FIG. 4B, the group of user equipments share one S5/S8 tunnel and an IPSec tunnel; for different base stations, different S-GWs, but the same P-GW As shown in FIG. 4C, the group of user equipments share an IPSec tunnel. To further understand the foregoing technical solutions provided by the embodiments of the present invention, the technical solutions provided by the embodiments of the present invention are described below by taking the MTC device accessing the MTC server as an example. The first embodiment of the MTC device 1 is used as an example to describe the method for establishing a group. In this embodiment, the MTC device 1 is the first user equipment to be accessed in the group to which the MTC device 1 belongs. FIG. 5 is a flowchart of the embodiment. As shown in FIG. 5, in the embodiment, the initial setup of the MTC device 1 includes the following steps: Step 501: The MTC Device 1 passes through the base station (eNodeB). The MME initiates an attach request, where the attach request carries the identity of the user equipment (such as the IMSI), and the MME can obtain the group identifier of the group to which the user equipment belongs by using the IMSI, or in the attach request, the MTC Device1 carries The group ID of the group to which it belongs. The group ID can be either an APN or a preset Group ID. Step 502: The MME sends a location update request to the HSS, where the location update request carries the user identity identifier IMSI. If the group identity of the user belonging group in the attach request is required, the group identifier is also required, so that the HSS obtains the user. The MME sends a location update response to the MME, where the location update response carries the subscription information of the MTC device 1 and the group subscription information of the group to which the MTC device 1 belongs. Step 504, the MME sends the selected S- The GW initiates a session establishment request, and the request indicates that the S-GW establishes a group bearer for the MTC device;

After receiving the setup session request, the S-GW allocates a group bearer tunnel identifier 1 to the group to which the MTC device 1 belongs. Step 505: The S-GW initiates a setup session request to the P-GW, where the request indicates that the P-GW establishes a group bearer for the MTC device 1, and also requests the P-GW to allocate an IP address for the MTC device 1, and the request further carries The group-bearing tunnel identifier 1 is assigned by the S-GW to the group to which the MTC device 1 belongs. Step 506: The P-GW initiates a group-based establishment process to the PCRF as a Policy and Charging Enforcement Function (PCEF). See the subsequent description for details. When the PCRF is not deployed on the network, the GW-GW determines the PCC policy carried by the group according to the information configured by the GW. Step 507: The P-GW sends a setup session reply to the S-GW, where the setup session reply carries the IP address assigned by the P-GW to the MTC device 1 and the group 7 tunnel identifier 2 assigned to the group to which the MTC device 1 belongs. Step 508, the S-GW sends a setup session reply to the MME, where the setup session reply carries the IP address assigned by the P-GW to the MTC device 1; Step 509, the MME sends an initial context setup request to the eNodeB, where The initial context setup request carries an attach accept message sent to the MTC device 1; the initial context setup request carries the IP address assigned by the P-GW to the MTC device 1, and the S-GW allocates the S1-U interface. The group carries the tunnel identifier 1; Step 510, the eNodeB and the MTC device 1 reconfigure the radio resource; Step 511, the eNoodeB sends an initial context setup reply to the MME, where the initial context setup reply may include the S1-U interface as the MTC The group assigned by the group to which the device 1 belongs carries the tunnel identifier 1; Step 512, the MTC Device sends a direct transmission message to the eNodeB; Step 513, the eNodeB sends an attach complete message to the MME, when the step 511 is not When contained in the eNodeB bearer interfaces S 1-U tunnel ID for the group 1 MTC device belongs assigned, the identifier transmitted in the present polymerization in step 4; step 514, MME transmits to repair _ S-GW? a load carrying request, where the 4爹 change request includes the grouped tunnel identifier 1 allocated by the eNodeB to the group to which the MTC device 1 belongs in the S1-U interface; step 4 is 515, and the S-GW sends 4 tampering to the MME. The reply is completed, and the establishment of the user's face group is completed. Embodiment 2 This embodiment is described in the first embodiment, and the MTC device 2 that belongs to the same group in the same eNodeB as the MTC device 1 is initially accessed as an example, and the method for modifying the group bearer is described. FIG. 6 is a flow chart of the initial access of the MTC device 2 in the embodiment. As shown in FIG. 6 , in the embodiment, the initial access by the MTC device 2 mainly includes the following steps: Steps 601-603 are the same as steps 501-503. Step 604: The MME determines that the device belongs to the same group as the MTC device 1 according to the belonging group information of the MTC device 2, and therefore, determines that the user plane of the MTC device 2 is aggregated into the established group. The MTC device 1 belongs to the group bearer of the group, and the MME initiates a modify session request to the S-GW, where the 4 tampering session request carries the group identifier, and requests to tamper with the group 7 corresponding to the group identifier;

After receiving the modified session request, the S-GW binds the data of the MTC device 2 to the group bearer corresponding to the group identifier between the base station and the S-GW. Step 605: After receiving the modify group bearer request, the S-GW initiates a modify session request to the P-GW, where the modify group bearer request carries a group identifier, and requests to modify the group bearer; and the P-GW receives the modified group. After the bearer request, the MTC device 2 is added to the group corresponding to the group identifier between the S-GW and the P-GW, and the data of the MTC device 2 is bound to the group 7. Step 606: The P-GW sends a group identifier to the PCRF, and notifies the PCRF that the group has a new MTC Device access, and requests a new PCC policy. Step 607: The P-GW sends a modified session reply to the S-GW. Step 608, S- The GW sends a 爹' tampering session reply to the P-GW; steps 609-615 are the same as steps 509-515. Embodiment 3 This embodiment describes a process of establishing a tunnel between a P-GW and an MTC server. FIG. 7 is a flowchart of a method for establishing a tunnel between a P-GW and an MTC Server in the embodiment. The method is an optional step, and does not affect the execution of other embodiments, and specifically includes the following steps: Step 701, in the figure After step 507, the P-GW initiates the establishment of the IPSec tunnel with the MTC Server, and includes the group identification information of the group to which the MTC device 1 belongs in the tunnel establishment request. In step 702, the MTC Server replies to the P-GW, and the tunnel is successfully established.

After receiving the message, the P-GW saves the mapping relationship between the tunnel and the group bearer on the P-GW, and all the uplink and downlink data of the users belonging to the group are transmitted through the tunnel at the P-GW and the MTC Server. According to an embodiment of the present invention, a network connection establishing apparatus is further provided, and the apparatus may be used to implement the foregoing network connection establishing method. FIG. 8 is a schematic structural diagram of a network connection establishing apparatus according to an embodiment of the present invention. As shown in FIG. 8, a network connection establishing apparatus according to an embodiment of the present invention mainly includes: a receiving module 1, a determining module 3, a bearer establishing module 5, and a record. Module 7 and binding module 9. The receiving module 1 is configured to receive an access request initiated by the user equipment, where the access request carries a group identifier indicating a group to which the user equipment belongs; the determining module 3 is connected to the receiving module 1 and is configured to be a user. If the device is configured to be configured between the first network element and the second network element, it is determined whether there is a group bearer corresponding to the group identifier between the first network element and the second network element. The bearer establishing module 5 is connected to the determining module 3. And in the case that the judgment result of the judgment module 3 is negative, the group bearer between the first network element and the second network element of the group to which the user equipment belongs; the record module 7 is connected to the bearer setup module 5, and is used for carrying The group 7 established by the establishing module 5 is recorded as the group 7 corresponding to the group identifier between the first network element and the second network element; the binding module 9 is connected with the determining module 3, and is used for determining the judgment of the module 3 In the case of YES, the data of the user equipment is bound to the group bearer. Corresponding to the above network connection establishment method, the embodiment of the present invention further provides a PCC policy formulation method for formulating a PCC policy based on a group bearer. FIG. 9 is a flowchart of a method for formulating a PCC policy according to an embodiment of the present invention. As shown in FIG. 9, the method for formulating a PCC policy according to an embodiment of the present invention mainly includes the following steps: Step S901: The P-GW receives the After the group requesting the group to which the first user equipment belongs, the group-bearing indication is sent to the policy and charging rule function (PCRF), where the group-initiated indication carries the group identifier of the first user equipment. Step S903 The PCRF receives the setup group bearer indication, and obtains the group subscription information corresponding to the group identifier by using a user subscription database (SPR). Step S905: The PCRF formulates the group identifier according to the group subscription information and the local configuration information. Corresponding group PCC policy. Further, when another user equipment (second user equipment) of the group to which the first user equipment belongs requests to access the network, the P-GW, when modifying the group bearer of the group, requests the PCRF to modify the PCC policy, therefore, The method can also include the following steps: Step 1: The second user equipment accesses the network, and the P-GW receives the modified session request from the S-GW, where the second user equipment belongs to the same group as the first user equipment; Step 2, the PCRF receives the P- a modified group bearer indication sent by the GW, where the modified group bearer indication carries the foregoing group identifier and an identifier indicating that the user equipment is added; Step 3, the PCRF adds the user equipment according to the group subscription information, the local configuration information, and the indication obtained from the SPR. The identification of the information, etc., to formulate a new PCC policy for the group corresponding to the above group identification. The above PCC policy formulation method will be described below through specific embodiments. Embodiment 4 This embodiment is described by taking the establishment of the PCRF participation group as an example. As shown in FIG. 10, when the group is established, the PCC policy is mainly composed of the following steps (the following description is one of the steps 506 in FIG. 5 above). Specific embodiment;): Step 1001, the UE initiates establishment of a group bearer, and the process is as shown in steps 501-505 of FIG. 5; Step 1002, the PCEF (ie, the P-GW in FIG. 5) sends a setup group indication to the PCRF. The set-up bearer carries the group identification information. Step 1003: The PCRF requests the SPR1 to obtain the group subscription information corresponding to the group identifier information, where the request carries the group identifier information. Step 1004, the PCRF is based on The acquired group subscription information, local configuration information, and the like formulate a PCC policy for the group. Step 1005: The PCRF sends an acknowledgement group to the PCEF, where the PCC policy is defined for the group. Step 1006, the PCEF and the UE complete the group bearer. The specific steps are as shown in step 507-step 515 of FIG. Fifth Embodiment In this embodiment, the PCRC participates in the tampering of the group 7 and the PCC strategy of the tampering group is described. FIG. 11 is a flowchart of a PCC policy of a group in which the PCRF participates in the group tampering and tampering in the present embodiment. As shown in FIG. 11, the PCC policy of the modified group mainly includes the following steps (ie, FIG. 6). A specific implementation of the step 606 is as follows: Step 4: 1101, a new UE accesses the network, and the UE in the fourth embodiment belongs to a group, because the network has established a group bearer of the group to which the UE belongs. Therefore, the network modifies the corresponding group bearer to aggregate the uplink and downlink data of the newly added UE. The specific steps are as shown in 601-605 of FIG. 6; Step 1102, the PCEF (ie, the P-GW in FIG. 6) sends a 爹爹组 grouping indication to the PCRF, where the group identification information is carried, and the UE indication is newly added; Step 1103; The PCRF generates a new PCC policy according to the group subscription information, the local configuration information, and the newly added UE indication obtained from the SPR in the fourth embodiment. In step 1104, the PCRF sends an acknowledgement group bearer modification indication to the PCEF, where The new PCC policy developed by the group; Step 1105, the PCEF completes the modification of the group bearer, and the specific steps are as shown in 607-615 of FIG. 6. Corresponding to the foregoing PCC policy formulation method, the embodiment of the present invention further provides a PCC policy formulation system. FIG. 12 is a schematic structural diagram of a PCC policy making system according to an embodiment of the present invention. As shown in FIG. 12, the PCC policy making system according to the embodiment of the present invention mainly includes: P-GW 2, SPR 4, and PCRF 6. The P-GW 2 is configured to send a setup group 7 indication to the PCRF 6 after receiving the session request for establishing the group bearer for the group to which the first user equipment belongs, where the setup group 7 carries the first indication The group identifier of the user equipment; the SPR 4 is used to store the group identifier of each group in the network and the group subscription information; the PCRF 6 is configured to receive the indication of the establishment group 7 and obtain the bearer indication in the setup group by using the SPR 4 The group identifies the corresponding group subscription information, and according to the group subscription information and the local configuration information, formulates a PCC policy of the group corresponding to the group identifier. Further, when the second user equipment that belongs to the same group as the first user equipment accesses the network, the P-GW 2 is further configured to receive a modify session request from the S-GW, and send a modified group bearer indication to the PCRF 6. The S-GW sends the modified session request when the second user equipment accesses the network, and the modified group bearer indication carries the group identifier (that is, the group identifier of the group to which the first user equipment and the second user equipment belong) And indicating an identifier for adding the user equipment; the PCRF 6 is further configured to add the user equipment according to the foregoing group subscription information, local configuration information, and indication obtained from the SPR 4. Identify, develop a new PCC policy for the group corresponding to the group ID. As described above, with the technical solution provided by the embodiment of the present invention, the user equipments are grouped, each group includes multiple user equipments, and the user equipments belonging to the same group can share one network side user plane eNodeB "-" S-GW - " PGW "-" MTC SERVER, which can reduce the occupied network resources, and can improve the utilization of network resources and reduce the waste of network resources. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for establishing a network connection, comprising:

Receiving, by the network side, an access request initiated by the user equipment, where the access request carries a group identifier indicating a group to which the user equipment belongs;

And determining, between the first network element and the second network element, whether there is currently a corresponding to the group identifier between the first network element and the second network element. Group bearer, if yes, binding the data of the user equipment to the group bearer; otherwise,

Establishing a group load between the first network element and the second network element for the group to which the user equipment belongs, and recording the group record as the first network element and the second network element The group corresponding to the group identifier.

The method according to claim 1, wherein the first network element is a base station, and the second network element is a serving gateway S-GW.

The method according to claim 2, wherein the establishing a group bearer between the first network element and the second network element for the group to which the user equipment belongs includes:

The base station forwards the received access request initiated by the user equipment to the mobility management entity MME;

The MME initiates a setup session request to the selected S-GW, where the setup session request carries the group identifier, and the S-GW is requested to establish the group 7 for the group to which the user equipment belongs. The S-GW receives the setup session request, and establishes the group 7 load between the base station and the S-GW for the group to which the user equipment belongs, and assigns the group 7 to carry the tunnel identifier.

The method of claim 3, wherein after the S-GW establishes the loading, the method further includes:

The S-GW sends a reply message to the base station by using the MME, where the reply message carries the group bearer tunnel identifier.

The method according to claim 2, wherein binding the user equipment to the group carrier comprises:

The base station forwards the received access request initiated by the user equipment to a mobility management entity;

Determining, by the mobility management entity, the group identifier carried in the access request, determining that the group 7 corresponding to the group identifier currently exists between the base station and the S-GW, to the S - GW initiates a session request, wherein the tampering session request carries the group identifier, and the S-GW 4 is requested to tamper with the group 7 corresponding to the group identifier;

The S-GW receives the modification session request, and binds the data of the user equipment to the group corresponding to the group identifier.

The method according to claim 1, wherein the first network element is an S-GW, and the second network element is a packet data network gateway P-GW.

The method according to claim 6, wherein the establishing a group bearer between the first network element and the second network element for the group to which the user equipment belongs includes:

After receiving the access request initiated by the user equipment, the S-GW initiates a setup session request to the P-GW, where the setup session request carries the group identifier, and the P- GW establishes the group load;

The P-GW receives the setup session request, and establishes the group 7 for the group to which the user equipment belongs between the S-GW and the P-GW, and the assignment group 7 carries the tunnel identifier.

The method according to claim 7, wherein after the P-GW establishes the group for the group to which the user equipment belongs, the method further includes:

The P-GW sends a setup session reply to the S-GW, where the setup session reply carries the group bearer tunnel identifier.

The method according to claim 8, wherein after the P-GW sends the setup session reply to the S-GW, the method further includes:

The P-GW initiates a tunnel establishment request to the machine type communication MTC server, and requests to establish a tunnel between the P-GW and the MTC server, where the tunnel establishment request carries the group identifier ; Receiving, by the MTC server, the tunnel establishment request, establishing a tunnel between the P-GW and the MTC server, and returning a tunnel identifier of the tunnel to the P-GW; The GW saves the mapping relationship between the tunnel identifier and the group identifier.

The method according to claim 9, wherein after the P-GW saves the mapping relationship between the tunnel identifier and the group identifier, the method further includes:

The P-GW and the MTC server transmit uplink and downlink data of user equipments belonging to the group corresponding to the group identifier through the tunnel.

The method according to claim 6, wherein binding the user equipment to the group carrier comprises:

After receiving the access request initiated by the user equipment, the S-GW determines that the S-GW and the P-GW currently exist according to the group identifier carried in the access request. The group 7 corresponding to the group identifier, the originating session request is sent to the P-GW, where the tampering session request carries the group identifier, and the P-GW is requested to be modified and the group identifier is requested. Corresponding group load;

The P-GW receives the modification session request, and binds the data of the user equipment to the group corresponding to the group identifier.

The method according to any one of claims 1 to 11, wherein the group identifier indicates the group to which the user equipment belongs by:

The identity of the user equipment;

Access point name;

The identifier of the group to which the user equipment belongs is preset.

13. A network connection establishing device, comprising:

a receiving module, configured to receive an access request initiated by the user equipment, where the access request carries a group identifier indicating a group to which the user equipment belongs; and a determining module, configured to establish a first And determining, by the network element and the second network element, whether a group corresponding to the group identifier currently exists between the first network element and the second network element;

a bearer establishing module, configured to establish a group load between the first network element and the second network element for the group to which the user equipment belongs if the judgment result of the determining module is negative; a recording module, configured to record the group bearer established by the bearer establishing module as a group bearer corresponding to the group identifier between the first network element and the second network element; And if the determination result of the determining module is yes, the data of the user equipment is bound to the group bearer.

A policy and charging control PCC policy-making method for formulating a PCC policy based on a group bearer, wherein the method includes:

After receiving the session request for the group to which the first user equipment belongs, the P-GW sends a setup group indication to the policy and charging rule function PCRF, where the setup group bearer indication carries the a group identifier of the first user equipment;

The PCRF receives the setup group indication, and obtains group subscription information corresponding to the group identifier by using a user subscription database SPR;

The PCRF formulates a PCC policy of the group corresponding to the group identifier in the group subscription information and the local configuration information.

The method according to claim 14, wherein after the PCRF formulates the PCC policy of the group, the method further includes:

The second user equipment accesses the network, and the P-GW receives the modified session request from the S-GW, where the second user equipment and the first user equipment belong to the same group; a modified group bearer indication sent by the P-GW, where the modified group bearer indication carries the group identifier and an identifier indicating that the user equipment is added;

The PCRF participates in the group subscription information, the local configuration information, and the identifier indicating that the user equipment is added, and the new PCC policy of the group corresponding to the group identifier is generated.

16. A PCC policy making system, comprising: P-GW, SPR and PCRF, and a towel thereof,

The P-GW is configured to send a setup group indication to the PCRF after receiving a session request for establishing a group bearer for the group to which the first user equipment belongs, where the setup group carries the indication a group identifier of the first user equipment;

The SPR is configured to store a group identifier of each group in the network and a group subscription information thereof; The PCRF is configured to receive the group setup indication, obtain, by using the SPR, group subscription information corresponding to the group identifier carried in the setup group bearer indication, and according to the group subscription information and local configuration information, A PCC policy for the group corresponding to the group identifier is formulated. The system of claim 16 wherein:

The P-GW is further configured to receive a modify session request from the S-GW, and send an indication to the PCRF, where the S-GW is when the second user equipment accesses the network. Sending the modification session request, and the second user equipment and the first user equipment belong to the same group, and the modification group bearer indication carries the group identifier and an identifier indicating that the user equipment is added;

The PCRF is further configured to formulate a new PCC policy for the group corresponding to the group identifier according to the group subscription information acquired from the SPR, local configuration information, and an identifier indicating that the user equipment is added.