CN1297156C - Position business system and communication method based on same - Google Patents

Abstract

The invention discloses a location service system including a location service center. The location service system also includes: a gateway location service center for processing location service messages. The location service center other than the service center is connected, and is connected with the gateway location service center in the public land mobile communication network that it does not belong to. The present invention also discloses a communication method based on the above-mentioned location service system, which includes: the gateway location service center receives messages from location service centers other than the gateway location service center in the public land mobile communication network to which it belongs, and the gateway location service center The location service center sends the message to the gateway location service center of its non-home public land mobile communication network. The invention greatly simplifies the network structure of the location service system among public land mobile communication networks.

Description

A location service system and a communication method based on the location service system

technical field

The invention relates to a location service system networking technology, in particular to a location service system and a communication method based on the location service system.

Background technique

The location service (LCS, Location Service) of the mobile communication network is to obtain the location information of the target user equipment (UE) through the positioning technology. The target UE refers to the target UE terminal positioned in the mobile communication network. The location information can be geographical longitude and latitude information or Location information on local streets. The location information obtained by the LCS system can be provided to the target UE for its own positioning; it can also be provided to the mobile communication network itself for sub-area billing or operation and maintenance; it can also be provided to other requests to obtain the location information of the target UE Client applications, such as institutions and individuals, are used for value-added services. Therefore, the location service has a wide range of functions in emergency rescue, vehicle navigation and intelligent transportation systems, work scheduling and team management, mobile yellow page query, and enhanced network performance. In the third generation partnership project (3GPP), the specification of the location service and the functional mode, structure, state description and message flow of the location service are described.

Figure 1 is a schematic diagram of the logic structure of the location service function, as shown in Figure 1: from the functional logic point of view, the functional logic entity for implementing the location service involves the requester 101, the functional entity for implementing the location service, and the target UE 106. Functional entities implementing location services include Gateway Mobile Location Center (GMLC) 102, User Data Storage Server (HLR/HSS) 103, Core Network (CN) 104, and Radio Access Network (RAN) 105. The requester 101 includes a requester and an LCS client. The LCS client refers to a software or hardware entity interfaced with the GMLC 102 for obtaining the location information of one or more target UEs 106; the requester refers to a request application client requesting the location information of the target UE 106, such as institutions and individuals , is the originator of the positioning request, and the LCS client can also be the requester at the same time. GMLC 102 provides a standard LCS interface for the information exchange between the requesting end and the entity implementing the location service function, and is used to process the location service message, for example, including authenticating the requesting end 101 and requesting the location information sent by the requesting end 101 The message is authenticated, and after the authentication of the requesting end is passed, a request for positioning the target UE 106 is initiated to the CN 104, and finally, the GMLC 102 is responsible for sending the location information of the target UE 106 to the requesting end 101.

The GMLC 102 may further include a requesting gateway mobile center (R-GMLC, RequestingGMLC) 107, a home gateway mobile center (H-GMLC, Home GMLC) 108 and a visiting gateway mobile center (V-GMLC, Visited GMLC) 109. R-GMLC 107 is the GMLC that receives the location information request from the requesting end, H-GMLC 108 is the GMLC to which the target UE 106 belongs, and V-GMLC 109 is the GMLC currently visited by the target UE 106, that is, the GMLC where the target UE is currently located. Connections are established between the R-GMLC 107 and the H-GMLC 108 and between the H-GMLC 108 and the V-GMLC 109 through the Lr interface. A connection is established between the requesting end 101 and the R-GMLC 107 through the Le interface. HLR/HSS 103 is used to store user data and provide relevant information of user equipment for other network logical entities, such as address information of H-GMLC 108, V-GMLC 109 and CN 104 of user equipment. The CN 104 receives and processes the positioning request initiated by the GMLC 102 for the target UE 106, cooperates with the RAN 105 to locate the target UE 106, and sends the positioning result to the GMLC 102.

R-GMLC, H-GMLC and V-GMLC may belong to the same public land mobile communication network (PLMN), or may belong to different PLMN networks. When R-GMLC, H-GMLC and V-GMLC belong to the same PLMN network, they can be the same physical entity or different physical entities.

Figure 2 is a schematic diagram of the networking of R-GMLC, H-GMLC and V-GMLC belonging to different PLMN networks. As shown in Figure 2, the R-GMLC in the PLMN A network and the H-GMLC in the PLMN B network pass through the Lr interface The H-GMLC in the PLMN B network is connected to the V-GMLC in the PLMN C network through the Lr interface.

In actual networking, in order to facilitate network planning, facilitate the development of location services, or be limited by data capacity, multiple GMLCs will be built in the same PLMN network, and each GMLC will store location service information of a part of target UEs. According to the networking mode defined by the current 3GPP specification, a GMLC in a PLMN network needs to be connected to all GMLCs in other PLMN networks in pairs, in order to normally process the inter-network location information request. However, all GMLCs in a PLMN network are connected in pairs with all GMLCs in other PLMN networks, which not only complicates the network structure, but also requires higher capabilities of all GMLCs in the PLMN network. All GMLCs can identify whether the request for location information between networks is legal, and require GMLC to be able to settle the correct fee for the request for location information between networks; moreover, the networking mode of connecting GMLCs in pairs will also expose some information of operators For the external PLMN network, such as the number of GMLCs contained in a PLMN network of the operator, the ownership status of the target UE, etc. In addition, in the networking mode where GMLCs are connected in pairs, adding or subtracting a GMLC in any PLMN network, or upgrading the capability of a certain GMLC, will cause all GMLCs in all other PLMNs to change the corresponding data configuration , making network maintenance and network operation quite difficult for operators.

Contents of the invention

In view of this, an object of the present invention is to provide a location service system, which simplifies the network structure of the location service system; another object of the present invention is to provide a communication method based on the above location service system.

In order to achieve the above object, the present invention provides a location service system, including a location service center, the location service system also includes: a gateway location service center for processing location service messages, the gateway location service center and its home public land mobile communication The location service center other than the gateway location service center in the network is connected, and is connected with the gateway location service center in the public land mobile communication network that it does not belong to.

The location service system further includes: a tandem location service center for processing location service messages. The location service center other than the location service center is connected.

The same public land mobile communication network contains more than one tandem location service center, and the tandem location service centers are connected in pairs.

The connection of the tandem location service center with the gateway location service center in the public land mobile communication network to which it belongs includes: connecting the tandem location service center with the tandem location service center in the public land mobile communication network to which the tandem location service center belongs to the public land mobile communication network The gateway location service center in the network is connected.

The tandem location service center being connected to location service centers other than the gateway location service center and the tandem location service center in its home public land mobile communication network includes: The tandem location service center is connected to the location service center in the public land mobile communication network to which it belongs.

The location service centers connected to the tandem location service center except the gateway location service center and the tandem location service center and the location services in the same public land mobile communication network except the gateway location service center and the tandem location service center The centers are directly connected two by two.

The location service center is: a gateway mobile positioning center, or a geographic information server, or a combination of the above two.

The location service system further includes: a user data storage server, a core network and a wireless access network.

The present invention also provides a communication method based on the above location service system, the method includes the following steps:

A. The gateway location service center receives a message from a location service center other than the gateway location service center in the public land mobile communication network to which it belongs, and the message carries a destination address;

B. The gateway location service center sends the message to the gateway location service center of the non-belonging public land mobile communication network according to the destination address and the routing information stored by itself.

The step A further includes the following steps: A1. The tandem location service center receives a message from a location service center connected to it belonging to the same public land mobile communication network except the gateway location service center and the tandem location service center A2. The tandem location service center sends the message to the gateway location service center in the public land mobile communication network to which it belongs according to the destination address and the routing information stored by itself, and the gateway location service center receives the message.

The step A1 further includes: the tandem location service center receives information from the gateway location service center and the tandem location service center through the tandem location service center connected to the location service center belonging to the same public land mobile communication network. Messages from other than location service centers.

In step A2, the tandem location service center sending the message to the gateway location service center in the public land mobile communication network it belongs to further includes: the tandem location service center is connected to the gateway location service center belonging to the same public land mobile communication network The tandem location service center sends the message to the gateway location service center.

After the step B, further include the following steps: C1, after receiving the message, the gateway location service center judges whether the message is legal, if yes, execute step C3, otherwise, execute step C2; C2, the gateway location service center directly ends Interaction of messages; C3. The gateway location service center sends the message to the location service center in the public land mobile communication network it belongs to according to the destination address and the routing information stored by itself.

The judging whether the message is legal includes: judging whether the public land mobile communication network sending the message and the public land mobile communication network to which the gateway location service center belongs perform agreement approval.

The step C3 further includes the following steps: C31, the gateway location service center sends a message to the tandem location service center according to the destination address and the routing information stored by itself; C32, the tandem location service center receives the message According to the destination address and the routing information stored by itself, the message is sent to the corresponding location service center connected to it.

The step C32 further includes: the tandem location service center sends the message to the location service center through the tandem location service center connected to the location service center belonging to the same public land mobile communication network.

Before the step A, the following steps are further included: A01. The location service center other than the gateway location service center judges whether the destination address carried in the message belongs to the public land mobile communication network to which it belongs. If yes, execute step A02, otherwise , execute step A03; A02, the location service center sends the message to the location service center in its home public land mobile communication network, and performs subsequent processing on the message until the processing ends; A03, the location service center sends the message to It belongs to the gateway location service center in the public land mobile communication network.

The step A02 further includes: the location service center sends a message through a tandem location service center in its home public land mobile communication network.

The location service system proposed by the present invention can greatly simplify the network structure of the location service system between PLMN networks through the G-GMLC belonging to different PLMN networks to exchange messages between PLMN networks; and add or reduce a GMLC in a PLMN network, It will not cause any impact on the GMLC in another PLMN network, only the data configuration of the G-GMLC needs to be changed. In addition, in a PLMN network, the T-GMLC is used to exchange messages between GMLCs, which can greatly simplify the internal network structure of the PLMN network. The location service system proposed by the present invention can effectively hide the relevant information of the operator; it reduces the requirements for the GMLC in the PLMN network when different PLMN network messages are intercommunicated, so that only the data configuration of the G-GMLC needs to be changed, and the The location service is processed normally, which greatly reduces the operator's network maintenance and network operation work.

Description of drawings

FIG. 1 is a schematic diagram of a logic structure of a location service function in the prior art;

FIG. 2 is a schematic diagram of a network in which R-GMLC, H-GMLC and V-GMLC belong to different PLMN networks in the prior art;

Fig. 3 is the schematic diagram of GMLC networking of different PLMN networks among the present invention;

Fig. 4 is a schematic diagram of a GMLC networking mode of the same PLMN network in the present invention;

Fig. 5 is another GMLC networking mode schematic diagram of the same PLMN network among the present invention;

FIG. 6 is a schematic diagram of the same PLMN network location service networking in the present invention;

Fig. 7 is a schematic diagram of an embodiment of the present invention;

Fig. 8 is a schematic diagram of GIS networking of different PLMN networks in the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

In the present invention, a gateway GMLC (G-GMLC) for message intercommunication with GMLC in other PLMN networks is set in each PLMN network as a functional entity for accessing other PLMN networks and sending messages to other PLMN networks. When the GMLC in the PLMN network sends a message, it judges whether the destination address belongs to the PLMN network it belongs to according to the routing information stored by itself, and if so, directly sends the message to the corresponding network entity for processing; otherwise, sends the message to its home The G-GMLC in the PLMN network, the G-GMLC sends the message to the G-GMLC in other PLMN networks; the G-GMLC in other PLMN networks sends the message to the corresponding G-GMLC in its home PLMN network according to the routing information stored by itself. network entity for processing. G-GMLC stores information belonging to G-GMLC of other PLMN networks, which facilitates intercommunication between GMLCs between PLMN networks. G-GMLC also stores relevant information corresponding to its PLMN network, such as the location service support of the PLMN network capability information.

Fig. 3 is the schematic diagram of GMLC networking of different PLMN networks in the present invention, as shown in Fig. 3, between different PLMN networks, the G-GMLC belonging to each PLMN network establishes connection with the G-GMLC belonging to other PLMN networks relation. In the same PLMN network, the GMLC in the network establishes a connection relationship with the G-GMLC of the local PLMN network, and sends location service-related messages to other PLMN networks through the G-GMLC of the local PLMN network; correspondingly, the local PLMN The G-GMLC of the network receives the message related to the location service sent by other PLMN networks, further processes the message and forwards it to the corresponding GMLC. Corresponding routing information is stored in the GMLC and G-GMLC, so after receiving a message related to the location service, the GMLC or G-GMLC can determine a subsequent route for sending the message according to the stored routing information.

As can be seen from Figure 3, the processing of a location information request is as follows:

Step 1: The requester initiates a location information request to the target UE, and the GMLC that receives the location information request determines whether the target UE identifier carried in the location information request belongs to the PLMN network to which it belongs, and if so, directly sends a request to the PLMN network to which it belongs The GMLC to which the corresponding target UE belongs sends a location information request; otherwise, go to step 2.

Step 2-Step 4: The GMLC that receives the location information request determines the address information of the G-GMLC in the PLMN network it belongs to according to the routing information stored by itself, and sends the location information request to the G-GMLC. After receiving the location information request, the G-GMLC of the PLMN network determines the address information of the G-GMLC in the PLMN network where the target UE belongs to according to the target UE identifier and the routing information stored by itself, and sends the address information to the PLMN network where the target UE belongs. The G-GMLC sends a location information request. After the G-GMLC in the target UE's home PLMN network receives the location information request, it determines the address information of the target home GMLC directly according to the target UE identity and its own stored routing information, or through information interaction with the HLR/HSS, and sends the address information to the target UE. The home GMLC sends a location information request.

Step 5: After receiving the location information request, the GMLC to which the target UE belongs authenticates the location information request and confirms whether the location information of the target UE is allowed to be passed to the requesting end. If the requesting end passes the authentication, the GMLC to which the target UE belongs passes Interact with the HLR/HSS to obtain the address information of the CN where the target UE is currently located and the GMLC address information corresponding to the CN, and determine whether the PLMN network where the target UE is currently located and the PLMN network to which the target UE belongs are the same PLMN network, if If yes, the GMLC to which the target UE belongs sends a location information request to the GMLC where the target UE belongs to the same PLMN network; otherwise, go to step 6. If the requester fails to pass the authentication, the GMLC to which the target UE belongs returns a failure message to the GMLC that received the location information request through the G-GMLC in its home PLMN network and the G-GMLC in the PLMN network that received the location information request, and receives The GMLC that receives the location information request returns a failure message to the requesting end, and the failure message may carry a corresponding failure reason value.

Step 6-Step 7: The GMLC to which the target UE belongs determines the address information of the G-GMLC in the PLMN network it belongs to according to the routing information stored by itself, and sends a location information request to the G-GMLC, and the location information request carries the target UE The address information of the current CN and the GMLC address information corresponding to the CN. After receiving the location information request, the G-GMLC in the target UE's home PLMN network determines the current PLMN of the target UE according to the address information of the CN where the target UE is currently located, or the GMLC address information corresponding to the CN and the routing information stored by itself. The address information of the G-GMLC in the network sends a location information request to the G-GMLC, and the location information request carries the address information of the CN where the target UE is currently located and the GMLC address information corresponding to the CN.

Steps 8 to 10: After the G-GMLC in the PLMN network where the target UE is currently located receives the location information request, it sends the location information to the GMLC where the target UE is currently located according to the address information of the GMLC where the target UE is currently located in the request message and the routing information stored by itself. Send a location information request, the location information request carries the address information of the CN where the target UE is currently located, the address information of the GMLC to which the target UE belongs, and the address information of the GMLC that received the location information request from the requesting end to the target UE. After the GMLC where the target UE is currently located receives the location information request, it stores the address information of the GMLC that the target UE belongs to and the address information of the GMLC that received the location information request from the requesting end to the target UE, and determines the current location of the target UE according to the routing information stored by itself. Address information of the CN where it is located, and send a location information request to the CN. After the CN where the target UE is currently located receives the location information request, it initiates a positioning request to the RAN where the target UE is currently located, and the RAN where the target UE is currently located locates the target UE and obtains the location information of the target UE.

Step 11-Step 12: After the RAN where the target UE is currently located obtains the location information of the target UE, it returns the location information of the target UE to the CN where the target UE is currently located, and then the CN where the target UE is currently located sends a target UE location information response to the corresponding GMLC message, that is, return a target UE location information response message to the GMLC where the target UE is currently located. The GMLC where the target UE is currently located judges whether the PLMN network where the target UE is currently located and the PLMN network where the target UE is currently located are the same PLMN network according to the stored address information and routing information of the GMLC where the target UE is currently located. The home GMLC of the target UE in the same PLMN network sends a target UE location information response message; otherwise, go to step 13.

Steps 13 to 15: The GMLC where the target UE is currently located determines the address information of the G-GMLC in its home PLMN network, and sends a target UE location information response message to the G-GMLC in its home PLMN network. The target UE location information response message Carries the address information of the target UE's home GMLC. After the G-GMLC in the PLMN network where the target UE is currently located receives the target UE location information response message, it determines the address information of the G-GMLC in the target UE's home PLMN network according to the address information of the target UE's home GMLC and its own stored routing information, Sending a target UE location information response message to the G-GMLC, where the target UE location information response message carries address information of the target UE's home GMLC. After receiving the target UE location information response message, the G-GMLC in the target UE's home PLMN network sends the target UE location information response message to the target UE's home GMLC according to the target UE's home GMLC address information and its own stored routing information. The target UE location information response message carries address information of the GMLC that receives the location information request from the requesting end to the target UE.

Step 16: After the GMLC to which the target UE belongs receives the target UE location information response message, it further authenticates the target UE location information response message to confirm whether it is allowed to provide the location information of the target UE to the requesting end, and if so, go to step 17 ; Otherwise, the GMLC to which the target UE belongs returns a failure message to the GMLC that received the location information request through the G-GMLC in its home PLMN network and the G-GMLC in the PLMN network that receives the location information request, and the GMLC that receives the location information request The GMLC returns a failure message to the requester, and the failure message may carry a corresponding failure reason value.

Step 17 to Step 20: The GMLC to which the target UE belongs determines the address information of the G-GMLC in the PLMN network it belongs to according to the routing information stored by itself, and sends a target UE location information response message to the G-GMLC, and the target UE location information responds The message carries the address information of the GMLC that received the location information request from the requesting end to the target UE. After the G-GMLC in the home PLMN network of the target UE receives the target UE location information response message, it determines that the location information request is received according to the address information of the GMLC that initiated the location information request to the target UE from the requesting end and the routing information stored by itself. address information of the G-GMLC in the PLMN network, and send a target UE location information response message to the G-GMLC. After receiving the location information request, the G-GMLC in the PLMN network receives the target UE location information response message, according to the address information of the GMLC that received the location information request from the requesting end to the target UE and the routing information stored by itself, sends the request to the GMLC that received the request. The GMLC that initiates a location information request to the target UE sends a target UE location information response message, and the GMLC that receives the location information request from the requesting end sends a target UE location information response message to the requesting end.

Fig. 4 is a schematic diagram of a GMLC networking mode of the same PLMN network in the present invention, as shown in Fig. 4, in the same PLMN network, each GMLC is directly connected to the G-GMLC of its belonging PLMN network, and all GMLCs in the PLMN network are directly connected in pairs. The above-mentioned networking mode is more suitable for a situation where a PLMN network includes a small number of GMLCs.

Fig. 5 is a schematic diagram of another GMLC networking mode of the same PLMN network in the present invention, as shown in Fig. 5, in the PLMN network, the tandem GMLC (T-GMLC) used to be responsible for the interaction of some GMLC messages in the same PLMN network is set, T-GMLC stores relevant information about its directly connected GMLC and other T-GMLCs in the PLMN network it belongs to. T-GMLC also stores corresponding routing information. G-GMLC is only directly connected to T-GMLC. - The GMLC is in turn directly connected to one or more GMLCs. When multiple GMLCs are directly connected to a T-GMLC, all of these GMLCs can be directly connected in pairs; some GMLCs can also be directly connected in pairs, for example, those that will be directly connected to a T-GMLC and have more message exchanges The other GMLCs are directly connected to each other, and the other GMLCs are only directly connected to the T-GMLC, and the message exchange between them is completed by forwarding messages from the directly connected T-GMLC. GMLCs directly connected to different T-GMLCs can also be directly connected in pairs. The T-GMLC and the G-GMLC in its home PLMN network can be indirectly connected through other T-GMLCs, and the T-GMLC and the GMLC in its home PLMN network can also be indirectly connected through other T-GMLCs to form a multi-level T-GMLC. Networking method.

The T-GMLC mentioned above can be a newly added functional entity in the PLMN network, or it can be improved from the original GMLC in the PLMN network, that is, the GMLC also serves as the T-GMLC. In addition to the relevant information of the directly connected GMLC and the relevant information of other T-GMLCs in the PLMN network, it also stores the location service data of the target UE, manages the location service of the target UE, and processes related location service requests. One or more T-GMLCs can be included in the same PLMN network. The above-mentioned networking mode is more suitable for a situation where a large number of GMLCs are included in a PLMN network, or a situation where GMLCs need hierarchical management.

If the T-GMLC is set in the PLMN network, the T-GMLC will participate in the message exchange process. The GMLC that needs to send the message may be called the originating GMLC, and the GMLC that receives the message may be called the receiving GMLC. The message exchange process in several situations is described below.

The originating GMLC and the receiving GMLC belong to the same PLMN network, and the two are directly connected. The originating GMLC directly sends the message to the receiving GMLC according to the routing information stored by itself.

The originating GMLC and the receiving GMLC belong to the same PLMN network, and the two are not directly connected. The originating GMLC sends the message to the directly connected T-GMLC according to the routing information stored by itself. The T-GMLC directly connected to the originating GMLC sends the message to the T-GMLC directly connected to the receiving GMLC according to the routing information stored by itself. The T-GMLC directly connected to the receiving GMLC sends the message to the receiving GMLC according to the routing information stored by itself.

The originating GMLC and the receiving GMLC belong to different PLMN networks, and the originating GMLC sends the message to the directly connected T-GMLC according to the routing information stored by itself. The T-GMLC directly connected to the originating GMLC sends the message to the G-GMLC of the PLMN network to which the originating GMLC belongs according to the routing information stored by itself. The G-GMLC of the PLMN network where the originating GMLC is located sends the message to the G-GMLC of the PLMN network to which the receiving GMLC belongs according to the routing information stored by itself. The G-GMLC of the PLMN network to which the receiving GMLC belongs sends the message to the T-GMLC directly connected to the receiving GMLC according to the routing information stored by itself. The T-GMLC directly connected to the receiving GMLC sends messages to and receiving the GMLC according to the routing information stored by itself.

Figure 6 is a schematic diagram of the same PLMN network location service networking in the present invention, as shown in Figure 6, in a PLMN network, the location service system includes: G-GMLC, GMLC, HLR/HSS, CN and RAN capable of locating the target UE , G-GMLC is connected with GMLC, HLR/HSS is connected with GMLC, G-GMLC and CN, and CN is connected with RAN.

FIG. 7 is a schematic diagram of an embodiment of the present invention. As shown in FIG. 7, a G-GMLC is set in a PLMN network, and four areas are divided, each area is set with a T-GMLC, and the four T-GMLCs are all connected to the G - GMLC is directly connected. All GMLCs located in an area are directly connected to the T-GMLCs in this area, and the GMLCs in this area can be directly connected, or no connection relationship can be established, and the message exchange between GMLCs can be performed through the T-GMLC.

G-GMLC can be responsible for authenticating the location information request of the external PLMN network, judging whether the PLMN network it belongs to has carried out the corresponding agreement with the PLMN network for message intercommunication, and if so, carrying out the message exchange with other PLMN networks Interworking, cooperate with functional entities in other PLMN networks to process location services; otherwise, refuse message interworking with other PLMN networks.

The G-GMLC mentioned above may be a newly added functional entity in the PLMN network, or it may be formed by improving the original GMLC in the PLMN network, that is, the GMLC also serves as the G-GMLC. At this time, in addition to storing the In addition to the relevant information corresponding to the PLMN network it belongs to and the information belonging to other PLMN networks G-GMLC, it also stores the location service data of the target UE, manages the location service of the target UE, and processes related location service requests. One or more G-GMLCs may be included in the same PLMN network.

Between GMLC and GMLC, between GMLC and T-GMLC, between GMLC and G-GMLC, between T-GMLC and T-GMLC, between T-GMLC and G-GMLC and between G-GMLC and G-GMLC as mentioned above The interface protocol can realize functional requirements by extending the existing Lr interface protocol, or by defining a new interface protocol.

In addition, the location service system also includes a geographic information server (GIS). Since the target UE location information returned by the CN obtained by the GMLC is in the geographic information format of longitude and latitude coordinates, the geographic information format of longitude and latitude coordinates is converted into real map information through GIS , such as the name of the area where the target UE is located, the name of the street, etc., making the location information of the target UE provided to the requester more intuitive. The functions of GIS can be implemented by one or more independent physical entities, or integrated in one or more GMLCs. When the functions of the GIS are implemented by multiple independent physical entities, the above-mentioned GMLC networking mode in the location service system is also applicable to the GIS networking situation.

Figure 8 is a schematic diagram of GIS networking of different PLMN networks in the present invention, as shown in Figure 8, between different PLMN networks, the G-GIS belonging to each PLMN network establishes a connection with the G-GIS belonging to other PLMN networks relation. In the same PLMN network, the GIS in the network establishes a connection relationship with the G-GIS of the PLMN network, and sends information related to map information to other PLMN networks through the G-GIS of the PLMN network; correspondingly, the PLMN The G-GIS of the network receives the messages related to the map information sent by other PLMN networks, further processes the messages and forwards them to the corresponding GIS. Corresponding routing information is stored in GIS and G-GIS, so after receiving a message related to map information, GIS or G-GIS can determine a subsequent route for sending the message according to the stored routing information. GIS can be connected with CN, RAN, etc. through GMLC.

In a word, the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (18)

1. A location service system, including a location service center, characterized in that: the location service system also includes: a gateway location service center for processing location service messages, the gateway location service center and its belonging public land mobile communication network except The gateway location service center is connected to the location service center other than the gateway location service center, and is connected to the gateway location service center in the public land mobile communication network that it does not belong to. 2. The location service system according to claim 1, characterized in that the location service system further comprises: a tandem location service center for processing location service messages, and the tandem location service center is respectively associated with the public land mobile communication network it belongs to The gateway location service center in the gateway is connected to location service centers other than the gateway location service center and the tandem location service center. 3. The location service system according to claim 2, characterized in that: the same public land mobile communication network contains more than one tandem location service center, and the tandem location service centers are connected in pairs. 4. The location service system according to claim 2, wherein the connection of the tandem location service center with the gateway location service center in the public land mobile communication network to which it belongs comprises: The tandem location service center in the mobile communication network is connected to the gateway location service center in the public land mobile communication network to which it belongs. 5. The location service system according to claim 2, wherein the tandem location service center is connected to location service centers other than the gateway location service center and the tandem location service center in the public land mobile communication network to which it belongs Including: the tandem location service center is connected to the location service center in the home public land mobile communication network through the tandem location service center in the home public land mobile communication network. 6. The location service system according to claim 2, characterized in that: the location service centers connected to the tandem location service center except the gateway location service center and the tandem location service center belong to the same public land mobile communication network The location service centers except the gateway location service center and the tandem location service center are directly connected in pairs. 7. The location service system according to claim 1, wherein the location service center is: a gateway mobile positioning center, or a geographic information server, or a combination of the two. 8. The location service system according to claim 1, characterized in that the location service system further comprises: a user data storage server, a core network and a wireless access network. 9. A communication method based on the location service system of claim 1, characterized in that the method comprises the following steps: A. The gateway location service center receives a message from a location service center other than the gateway location service center in the public land mobile communication network to which it belongs, and the message carries a destination address; B. The gateway location service center sends the message to the gateway location service center of the non-belonging public land mobile communication network according to the destination address and the routing information stored by itself. 10. The method according to claim 9, characterized in that said step A further comprises the following steps: A1. The tandem location service center receives messages from location service centers other than the gateway location service center and the tandem location service center belonging to the same public land mobile communication network connected to it; A2. The tandem location service center sends the message to the gateway location service center in the public land mobile communication network to which it belongs according to the destination address and the routing information stored by itself, and the gateway location service center receives the message. 11. The method according to claim 10, characterized in that the step A1 further comprises: the tandem location service center receives information from Messages at location service centers other than the gateway location service center and the tandem location service center. 12. The method according to claim 10, wherein in step A2, the tandem location service center sends the message to the gateway location service center in its home public land mobile communication network, further comprising: the tandem location service center The message is sent to the gateway location service center through the tandem location service center connected to the gateway location service center belonging to the same public land mobile communication network. 13. The method according to claim 9, further comprising the following steps after step B: C1. After receiving the message, the gateway location service center judges whether the message is legal, if yes, execute step C3, otherwise, execute step C2; C2. The gateway location service center directly ends the message interaction; C3. The gateway location service center sends the message to the corresponding location service center in the public land mobile communication network it belongs to according to the destination address and the routing information stored by itself. 14. The method according to claim 13, wherein the judging whether the message is legal comprises: judging whether the public land mobile communication network sending the message and the public land mobile communication network to which the gateway location service center belongs perform agreement approval. 15. The method according to claim 13, characterized in that said step C3 further comprises the following steps: C31. The gateway location service center sends the message to the tandem location service center according to the destination address and the routing information stored by itself; C32. After receiving the message, the tandem location service center sends the message to the connected location service center according to the destination address and the routing information stored in itself. 16. The method according to claim 15, characterized in that the step C32 further comprises: the tandem location service center sends the tandem location service center to the tandem location service center connected to the location service center belonging to the same public land mobile communication network. The message is sent to the location service center. 17. The method according to claim 9, characterized in that the step A further includes the following steps: A01. The location service center other than the gateway location service center judges whether the destination address carried in the message belongs to the public land mobile communication network to which it belongs, if yes, execute step A02, otherwise, execute step A03; A02. The location service center sends the message to the location service center in the public land mobile communication network to which it belongs, and performs subsequent processing on the message until the processing is completed; A03. The location service center sends a message to the gateway location service center in the public land mobile communication network to which it belongs. 18. The method according to claim 17, characterized in that the step A02 further comprises: the location service center sends a message through a tandem location service center in its home public land mobile communication network.

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