WO2008028420A1 - Système fondé sur l'acheminement d'emplacement et procédé et dispositif d'acheminement d'emplacement - Google Patents

Système fondé sur l'acheminement d'emplacement et procédé et dispositif d'acheminement d'emplacement Download PDF

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Publication number
WO2008028420A1
WO2008028420A1 PCT/CN2007/070511 CN2007070511W WO2008028420A1 WO 2008028420 A1 WO2008028420 A1 WO 2008028420A1 CN 2007070511 W CN2007070511 W CN 2007070511W WO 2008028420 A1 WO2008028420 A1 WO 2008028420A1
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WIPO (PCT)
Prior art keywords
location
information
routing
initiator
identifier
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PCT/CN2007/070511
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English (en)
Chinese (zh)
Inventor
Youzhu Shi
Ni Zhang
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008028420A1 publication Critical patent/WO2008028420A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding

Definitions

  • the present invention relates to mobile communication technologies, and more particularly to location routing based systems and location routing devices and methods. Background of the invention
  • the user sends a call request to the Call Session Control Function (CSCF) through the User Equipment (UE), and the domain name server (Domain Name) Server, DNS) resolves the Universal Resource Identifier (URI) carried in the call request, obtains the routing information of the called party from the call request, and performs location routing according to the location information of the UE and the routing information of the called party.
  • CSCF Call Session Control Function
  • UE User Equipment
  • DNS domain name server
  • URI Universal Resource Identifier
  • the DNS cannot resolve the routing information obtained by the called party, so routing cannot be performed, and the call sent by the calling party cannot be routed to the called party.
  • the user sends an emergency call to the emergency call session control unit (E-CSCF) of the IMS through the UE, requesting to provide an emergency call service, but the emergency call request does not carry the URI, but carries the called party.
  • E-CSCF emergency call session control unit
  • URN Uniform Resource Name
  • embodiments of the present invention provide a location-based routing system, a location routing device, and a location routing method that can ensure that a call is routed to a called party.
  • a location routing based system includes: a call session device and a location routing device,
  • the call session device sends a request for acquiring the receiver routing information to the location routing device according to the communication request from the initiator, where the communication request includes any one or combination of the initiator identifier and the initiator location information, where Determining, in the request for acquiring the routing information of the receiver, any one or combination of the initiator identifier and the initiator location information;
  • the location routing device obtains routing information of the receiver according to a request from the call session device for acquiring receiver routing information.
  • a location routing device provided by the embodiment of the present invention includes a routing module, and the device further includes: a querying module, configured to acquire, according to the obtaining routing information from the outside, the routing information of the receiving party.
  • a location routing method provided by the embodiment of the present invention includes the following steps: receiving a request for acquiring a routing information of a receiver sent by a call session device according to a communication request of an initiator, where the communication request includes an initiator identifier and an initiator Any one or combination of the location information, where the request for acquiring the receiver routing information includes any one or combination of the initiator identifier and the initiator location information;
  • the location-based routing system can ensure that the routing information of the receiver is obtained when performing location routing, and the call is routed to the receiving according to the routing information of the receiver.
  • Figure la is an exemplary structural diagram of a system based on location routing in an embodiment of the present invention.
  • Figure lb is an exemplary expanded structural diagram of a location-based routing based system in an embodiment of the present invention.
  • the figure is an exemplary flowchart of a location routing method in an embodiment of the present invention.
  • FIG. 3 is a structural diagram of a system based on location routing according to Embodiment 1 of the present invention.
  • FIG. 4 is a flowchart of a location routing method according to Embodiment 1 of the present invention.
  • FIG. 5 is a structural diagram of a system based on location routing according to Embodiment 2 of the present invention.
  • FIG. 6 is a flowchart of a location routing method according to Embodiment 2 of the present invention.
  • FIG. 7 is a structural diagram of a system based on location routing according to Embodiment 3 of the present invention.
  • FIG. 8 is a flowchart of a method for location routing according to Embodiment 3 of the present invention. Mode for carrying out the invention
  • the information exchange between the call session device and the location routing device is implemented, so that the location-based routing system obtains the routing information of the receiver, and routes the call to the receiver according to the routing information of the receiver.
  • the originating party's communication request includes the location information of the initiator, and the location information is trusted.
  • a location routing device such as a location retrieval function (LRF)
  • LRF location retrieval function
  • the embodiment of the present invention uses a call session device to perform information interaction with a location routing device having a function of querying routing information. Implement the routing of the call.
  • the invention is a connection interface between a call session device and a location routing device in the system, and an interface protocol is set, thereby realizing information interaction between the two.
  • Figure la is an exemplary structural diagram of a system based on location routing in an embodiment of the present invention.
  • the location-based routing system includes: a call session device 101 and a location routing device 102, and the call session device 101 and the location routing device 102 are connected through an interface 11.
  • the interface protocol of the interface 11 may be a protocol such as a SIP, a Diameter protocol, or a Hypertext Transfer Protocol (HTTP).
  • a protocol such as a SIP, a Diameter protocol, or a Hypertext Transfer Protocol (HTTP).
  • HTTP Hypertext Transfer Protocol
  • the call session device 101 is configured to receive a communication request from the initiator, and send a request to the location routing device 102 to obtain the receiver routing information.
  • the communication request includes any one or combination of an initiator identifier and an initiator location information, and the request may further include a receiver identifier.
  • the request for obtaining the receiver routing information includes any one or combination of the initiator identifier and the initiator location information, and the request identifier may also be included in the request.
  • the location routing device 102 is configured to query the routing information of the receiver according to the request from the call session device 101 for acquiring the receiver routing information.
  • the communication request may be a communication request for initiating a call service or a request for initiating a message service.
  • the initiator identifier includes: any one or combination of a user identifier and a terminal identifier, and the user identifier generally refers to a public user identifier, such as a SIP URI, a TEL URI, and the like.
  • the terminal identifier is at least one of the following: device identifier, IP address, Globally Routable User Agent URIs (GRUU), where the device identifier generally refers to IMEI.
  • the location routing device 102 queries the routing information of the receiver according to the location information of the initiator and the identifier of the receiver.
  • the receiver identifier may be included in the communication request, and may be a URN, a URI, or other information.
  • the location routing device 102 can send the communication request to the receiver according to the routing information, or will receive
  • the party's routing information is sent to the call session device 101, and the call session device 101 sends a communication request to the recipient based on the routing information.
  • Figure lb is an exemplary expanded block diagram of a location based routing based system of the present invention.
  • the location routing device 102 can perform information interaction with the location server 103, obtain location information of the trusted initiator, and provide A system for location-based routing.
  • the location routing device 102 can also query the routing information of the recipient based on the location information of the initiator and the recipient identification. Similarly, if the location information of the initiator is not included in the communication request, or the location information included is not trusted, the location routing device 102 can perform information interaction with the location server 103, obtain location information of the trusted initiator, and provide the location information to the A location-based routing system.
  • the location server 103 has the function of querying location information, but there is no standard communication interface and information interaction process with the call session device 101 and the location routing device 102, so information interaction cannot be achieved.
  • the embodiment of the present invention provides a connection interface between the call session device 101, the location routing device 102, and the location server 103 in the system, and respectively sets an interface protocol, thereby implementing information exchange between the three.
  • the extended location-based routing system includes: a call session device 101, a location routing device 102, and a location server 103.
  • the call session device 101 and the location routing device 102 are connected through an interface 11, and the location routing device 102 and The location servers 103 are connected through an interface 12, and the call session device 101 and the location server 103 are connected through an interface 13.
  • the interface protocol of the interface 11 may be a protocol such as SIP, Diameter Protocol, and HTTP; the interface protocol of the interface 12 and the interface 13 may be a Multi-Layered-Perceptron (MLP) or a Packet Layer Protocol (Packet Layer Protocol). Protocols such as PLP).
  • MLP Multi-Layered-Perceptron
  • Packet Layer Protocol Packet Layer Protocol
  • the call session device 101 is configured to receive a communication request from the initiator; when the communication request does not include the initiator location information or the location information is not trusted, the call session may be directly sent to the location server.
  • the location information of the originator is requested 103, and a request to obtain routing information including location information from the location server 103 is sent to the location routing device 102.
  • the location routing device 102 is configured to query, according to the location information of the initiator and the identifier of the receiver, the routing information of the receiver.
  • the location server is used.
  • 103 requests to obtain location information; according to the routing information of the receiver, initiates a route to the receiver.
  • the location routing device 102 includes: a query module and a routing module, where the query module is configured to receive a routing information request and a receiver identifier from the outside; obtain the location information of the initiator from the outside, and obtain the location information according to the The receiver identifier is used to query the routing information of the receiver, and the routing information is sent to the routing module.
  • the routing module is configured to initiate a route to the receiver according to the routing information of the receiver.
  • the receiver identifier is included in the communication request, and may be a URN, a URI, or other information.
  • the location server 103 is configured to send the location information of the initiator to the call session device 101 or the location routing device 102 according to the request.
  • the request for acquiring the location information includes the initiator identifier, where the initiator identifier is reported by the initiator through the communication request, and the location server 103 queries the location information of the initiator according to the initiator identifier; It can be the terminal ID of the initiator or the user ID of the initiator.
  • the location server 103 can query for a location information that can be located.
  • the location information that can be located is that the location routing device can obtain unique routing information according to the information, and when the location information is untargetable.
  • Information routing The device 102 reacquires the positional information that can be located by the call session device 101, for example, requests the call session device 101 to obtain from the initiator, etc.; the location routing device 102 can obtain unique routing information according to the positional information that can be located; When marking, one or more positionable location information can be queried, because multiple terminals can share one user identifier, so more than one positionable location information may be obtained.
  • the location information obtained by the above query may further include positioning assistance information, when used to have more than one positionable location information, one of the one or more location information may be selected according to the auxiliary information, as the initiator may Location information for targeting.
  • the positioning assistance information may include any one or combination of the initiator's terminal identification and initiator capability information.
  • the location routing device 102 can obtain one or more routing information based on the location information. At this time, when the location routing device 102 obtains more than one routing information, the location routing device 102 returns an error message to the call session device 101; or selects one of the routing information as the routing information of the recipient; or the call session device 101 Returning the response, requesting to report a location information; all routing information may also be returned to the call session device 101 for further processing by the call session device 101, such as selecting a routing information.
  • the location routing device 102 can also return all location information to the call session device 101, select a location information by the call session device 101, and then send it to the location routing device 102, or request
  • the initiator can report the location information, and the location information can be determined and reported to the location routing device 102.
  • the location routing device then queries the receiver's routing information according to the reported unique location information.
  • call session device 101 When call session device 101 obtains more than one addressable bit from location server 103 When the information is set, the call session device 101 returns a response to the initiator, requesting to report a location information; or returning all the location information to the initiator, and the latter performs corresponding processing, such as selecting a location information; or returning to the initiator.
  • the error message may also be selected to be sent to the location routing device 102; all location information may also be sent to the location routing device 102, which performs corresponding processing, such as selecting a location information.
  • the call session device 101 can be an E-CSCF, a service-call session control functional unit
  • S-CSCF Serving-Call Session Control Function
  • I-CSCF Inquiry-Call Session Control Function
  • P- CSCF Proxy-Call Session Control Function
  • ACF Access Gateway Control Function
  • BGCF Border Out Gateway Control Function
  • IBCF Interconnection Border Control Function
  • a functional unit such as a functional unit (Application Sever, AS) or a media gateway control function (MGCF);
  • the location routing device 102 may be a functional unit such as an LRF including a Routing Determination Function (RDF);
  • the server 103 may be a functional unit such as a Gateway Mobile Location Centre (GMLC).
  • GMLC Gateway Mobile Location Centre
  • the originator-initiated call can be routed.
  • FIG. 2 is an exemplary flow chart of a location routing method in the present invention.
  • Step 201 The call session device 101 sends a request for acquiring the routing information of the receiver to the location routing device 102 according to the communication request of the initiator.
  • the communication request includes any one or a combination of an initiator identifier and an initiator location information, and the request may further include a receiver identifier.
  • the request for acquiring the receiver routing information includes the initiator identifier and the initiator location information. Any one or combination, the request is also A recipient identification can be included.
  • Step 202 The location routing device 102 receives the request from the call session device 101 to obtain routing information of the receiver.
  • the location routing device 102 can initiate a route to the receiver by different means such as redirection or proxy.
  • the initiator identifier includes: any one or combination of the user identifier and the terminal identifier; the terminal identifier may be at least one of the following: a device identifier, an IP address, and a GRUU; and the request for obtaining the routing information is a SIP message, a Diameter.
  • Messages, HTTP messages; communication requests can be call services, message services.
  • the technical solution provided by this embodiment can also be applied to an IMS system.
  • the technical solution provided by this embodiment is also applicable to other systems that cannot obtain the receiver routing information when routing the call.
  • the originating party is a caller that initiates a call service
  • the communication request is a call request
  • the receiver is a called party, for example, the location routing based system, the location routing device, and the location routing method of the present invention are performed. Detailed description.
  • FIG. 3 is a structural diagram of a system based on location routing according to Embodiment 1 of the present invention.
  • the location-based routing system in this embodiment includes: a call session device, a location routing device 302, and a location server 303.
  • the call session device further includes: a call session device A 301 and a call session device B 304.
  • the user sends a call request based on a Session Initiated Protocol (SIP) to initiate a call request, and the location-based system routes the call to the called party, and the calling party and the called party respectively belong to the caller.
  • SIP Session Initiated Protocol
  • Call session device A 301 for receiving a call from the calling party INVITE, that is, calling
  • the caller identifier in the INVITE message and the URN of the called party are carried in the routing information request based on the Diameter protocol, and sent to the location routing device 302, requesting Obtaining the routing information of the called party; receiving the routing information response including the routing information from the location routing device 302, replacing the URN in the INVITE message with the routing information in the response, regenerating the INVITE message, and according to the route in the INVITE message Information, the INVITE message is routed to the call session device B 304.
  • the location routing device 302 is configured to receive a routing information request from the call session device A 301, where the request includes the calling party identifier and the URN of the called party; after determining that the location information of the calling party is not included in the request, to the location server 303, sending a location information request including a caller identity, requesting to acquire location information of the caller; receiving location information from the location server 303, and from the internally stored routing information list according to the called party's URN and the received location information. Querying the routing information of the called party. After determining that the system performs location routing in the redirection manner according to the preset setting, the queried routing information is carried in the routing information response based on the Diameter protocol, and sent to the call session device A 301.
  • a location server 303 configured to receive a location information request including a caller identity from the location routing device 302; query the location information of the calling party from the internally stored location information list according to the caller identity in the request; The information is sent to the location routing device 302.
  • the call session device B 304 is configured to route the INVITE message from the call session device A 301 to the called party according to the routing information in the INVITE message.
  • the call session device A 301 may also send the caller identifier in the INVITE message to the location information request and send it to the location server 303 after determining that the location information of the caller is not included in the INVITE message from the caller. Requesting to obtain location information of the calling party; receiving location information from the location server 303, and placing the INVITE message The caller identification, the received location information, and the URN of the called party are carried in the routing information request based on the Diameter protocol and sent to the location routing device 302, requesting to obtain the routing information of the called party.
  • the location routing device 302 queries the routing information of the called party according to the routing information request from the calling session device A 301 and according to the URN of the called party and the location information of the calling party in the request message.
  • the location server 303 queries the location information of the calling party based on the request from the call session device A 301 and based on the terminal identity from the call session device A 301; and transmits the queried location information to the call session device A 301.
  • the location information of the calling party may be requested by the location routing device 302 from the location server 303, or may be requested by the call session device A 301 from the location server 303.
  • the location server 303 queries the location information of the calling party according to the terminal identifier reported by the calling party as the calling party identifier, and obtains the unique location information.
  • the location server 303 queries according to the user identifier reported by the calling party, one or more Location information.
  • the location server 303 can query the location information of the calling party from the internally stored location information list, and can also query the location information of the calling party from other devices in the system.
  • the positioning assistance may be performed according to any one or any combination of information including the terminal identifier of the user and the caller capability information returned by the location server 303.
  • Information select one of a plurality of location information as the location information of the calling party.
  • the positioning assistance information is included in the location information.
  • the location routing device 302 queries the routing information of the called party according to the multiple location information to obtain multiple routing information. .
  • the location routing device 302 queries multiple routing information, it returns an error message to the call session device A 301, or optionally one of the routing information as the routing information of the called party, or The call session device A 301 returns a response, requires reporting unique and trusted location information, and re-query the routing information of the called party.
  • the INVITE message from the calling party includes the location information of the calling party.
  • the location routing device 302 and the call session device A 301 do not need to obtain the location information from the location server.
  • the location routing device 302 or the call session device A 301 still needs to obtain the location information of the calling party from the location server.
  • FIG. 4 is a flowchart of a location routing method according to Embodiment 1 of the present invention. As shown in FIG. 4, the location routing method in this embodiment includes the following steps:
  • Step 401 The call direction call session device A 301 sends a SIP-based INVITE message to initiate a call request to the called party.
  • the initiated call request may be an emergency call request, or a call request for a general call.
  • Step 402 The call session device A 301 carries the caller identifier in the INVITE message and the URN of the called party in the routing information request based on the Diameter protocol according to the call request, and sends the request to the location routing device 302 to request the slave location routing device. 302 acquires routing information of the called party.
  • the routing information request based on the Diameter protocol carries the following Attribute-Value-Pairs (AVP): a Callee-URN AVP indicating the called party URN, and a Caller-Location AVP indicating the location information of the calling party.
  • AVP Attribute-Value-Pairs
  • Caller-id AVP which indicates the caller's terminal ID or user ID
  • the Callee-URI AVP which is the routing information.
  • the Callee-URI AVP is the default routing information.
  • the caller's location information is not included in the call request. Therefore, the Caller-Location AVP at this time is empty.
  • the call session device A 301 since the location information of the calling party is not included in the INVITE message, the call session device A 301 does not include the location information of the calling party in the request sent to the location routing device 302; the call session device A 301 is based on the call.
  • the party's call request directly sends a routing information request to the location routing device 302, and may also determine whether the routing information of the called party can be obtained from the call request after receiving the call, if the called party can be obtained from the call request.
  • the routing information directly routes the call to the called party according to the obtained routing information. If the routing information of the called party cannot be obtained from the call request, the following steps are performed.
  • Step 403 the location routing device 302 receives the routing information request from the call session device A 301, including the calling party identifier and the called party URN, and determines that the location information of the calling party is not included in the request, and therefore, sends the location information to the location server 303.
  • the location information request based on the MLP protocol, including the caller identification, requests to obtain the location information of the calling party from the location server 303.
  • Step 404 the location server 303 receives the request from the location routing device 302, including the caller terminal identifier, and queries the location information of the caller from the internally stored location information list according to the terminal identifier, and carries the queried location information based on the location information.
  • the routing response of the Diameter protocol is sent to the location routing device 302.
  • the location information request is a message based on the MLP protocol, and may also be a message based on the PLP protocol;
  • the caller identifier is a terminal identifier, and the location server 303 queries the terminal identifier according to the caller identifier as a unique identifier.
  • the location information when the caller ID reported by the calling party is the user identifier, the location server 303 queries the location information according to the user identifier, and then obtains one or more location information.
  • Step 405 The location routing device 302 queries the routing information of the called party according to the unique location information from the location server 303 and the URN of the called party. If the correct routing information is not found, the default is in the Callee-URI AVP. Information as routing information.
  • the queried routing information is also unique routing information.
  • the location routing device 302 selects from the plurality of location assistance information including any one or any combination of the terminal identifier and the caller capability information of the user returned by the location server 303.
  • One of the location information is selected as the location information of the calling party; the positioning assistance information is included in the location information.
  • the location routing device 302 queries the routing information of the called party according to the multiple location information to obtain multiple routing information. .
  • one of the routing information may be selected as the routing information of the called party, or may return an error message to the call session device A 301, and may also return to the call session device A 301.
  • the call session device A 301 is required to report unique, trusted location information to re-query the routing information.
  • Step 406 the location routing device 302 determines to initiate a route to the called party in a redirected manner, and therefore sends the queried routing information to the call session device A 301.
  • the routing information is carried in the routing information response based on the Diameter protocol, and is sent to the call session device A 301, including: Callee-URN AVP, Caller-Location AVP, Caller-id AVP, and Callee-URI AVP.
  • the Callee-URI AVP is the determined correct routing information
  • the Caller-Location AVP at this time is the trusted caller location information.
  • Step 407 The call session device A 301 replaces the URN in the INVITE message with the URI formed by the routing information, regenerates the INVITE message, and routes the INVITE message to the call session device B 304 according to the routing information in the INVITE message.
  • Step 408 the call session device B 304 routes the INVITE message to the called party according to the routing information in the INVITE message.
  • step 409 a call connection is successfully established between the calling party and the called party.
  • the call session device A 301 may request to obtain the location information of the calling party from the location server, and obtain the obtained location information, the URN of the called party, and the Diameter-based protocol.
  • the routing information request is sent to the location route together, so that the process does not perform steps 403 to 404, but after step 402, step 405 is directly executed, and the location routing device 302 is based on the called party's URN and from the call session device A.
  • the location information of 301 is used to query the routing information of the called party.
  • the routing information request and the routing information response between the call session device A 301 and the location routing device 302 are both based on the Diameter protocol information, and may also be request messages based on protocols such as SIP and HTTP.
  • the information exchange through the Diameter protocol is mainly implemented according to the AVP of the Diameter protocol.
  • Callee-URN-Id is the called URN and the type is Diamldent.
  • the Caller-id AVP is defined as follows:
  • Equipment-Id is the device identifier of the called party, and the type is UTF8String
  • IP-Addr is the IP address of the called party, and the type is Address
  • GRUU-Id is the IP address of the called party, of type UTF8String
  • Sip-URI-Id is the Sip-URI identifier of the called party, the type is DiamURI; Tel-URI-Id is the TEL-URI identifier of the called party, and the type is DiamURI; the called party identifier can be among the above five parameters. anyone.
  • the Caller-Location AVP is defined as follows:
  • Caller-Location-Addr is the location information of the calling party, including country, city, district, etc., of type UTF8String;
  • Caller-Location- Geography is the location information of the calling party, including the longitude, latitude and other geographical locations, and the type is OctetString;
  • the location information of the calling party can be any of the above two parameters.
  • the Caller-Location AVP is defined as follows:
  • Callee-URI-Id is the routing information of the called party, Sip-URI identifier, type is DiamURI;
  • the location routing device 302 will perform information interaction with the location server 303 to determine whether the location information is trusted, if trusted. Then, the location server is not requested to obtain the location information, and step 405 is directly executed.
  • the location routing device 302 queries the routing information of the called party according to the location information and the URN of the calling party. If the INVITE message sent by the calling party includes the call The location information of the party, in step 403, the location routing device 302 will determine whether the location information is trusted by performing information interaction with the location server 303, and if not trusted, the trusted location information will still be obtained from the location server 303.
  • the location routing device 302 queries the routing information of the called party according to the untrusted location information.
  • the location information is location information that can be located.
  • the location routing device reacquires the location information that can be located through the call session device, for example, requests the call session device to obtain the location information from the initiator. Etc; various identifiers may also not be carried in the request message, but sent before or after the request message.
  • the call session device may also be divided into the call session device A 301 and the call session device B 304, but the call session device A 301 and the call session device B 304 are implemented by a call session device.
  • the calling party identifier is the terminal identifier of the calling party, and may also be the user identifier of the calling party; the called party identifier may be a URN or other information. Location routing uses redirection or proxy mode.
  • the calling party and the called party belong to different call session devices, and may also belong to the same call session device;
  • the call session device 301 and the call session device B 304 may be E-CSCF, S-CSCF, I-CSCF, P- A functional unit such as a CSCF, an AGCF, a BGCF, an IBCF, an AS, or an MGCF;
  • the location routing device 302 may be a functional unit such as an LRF; and the location server 303 may be a functional unit such as a GMLC.
  • the location-based routing system, the location routing device, and the location routing method in this embodiment are also applicable to other services except the call service, such as a message service.
  • the location-based routing system in the first embodiment uses the redirection method to route the caller's call to the called party, and may also proxy the caller's call to the called party, which constitutes the present invention.
  • Example 2
  • FIG. 5 is a structural diagram of a system based on location routing according to Embodiment 2 of the present invention.
  • the location-based routing system in this embodiment includes: a call session device, a location routing device 502, and a location server 503.
  • the call session device further includes: a call session device A 501 and a call session device B 504.
  • the user sends a SIP-based INVITE message through the calling party, and initiates The call, location based based system routes the call to the called party, and the calling party and the called party belong to the call session device A 501 and the call session device B 504, respectively.
  • the call session device A 501 is configured to receive a call from the caller INVITE, that is, a call initiated by the user, where the INVITE message includes the caller identifier and the called party identifier; when the called party routing information cannot be obtained from the INVITE message, the INVITE is The message is sent to the location routing device 502 requesting to query the routing information of the called party.
  • the location routing device 502 is configured to receive an INVITE message from the call session device A 501. After determining that the location information of the caller is not included in the INVITE message, send a PLP protocol-based location information request including the caller identity to the location server 503.
  • the URN in the INVITE message is replaced with the queried routing information, the INVITE message is regenerated, and the INVITE message is routed to the call session device B 504 according to the routing information of the called party.
  • a location server 503 configured to receive a location information request including a caller identity from the location routing device 502; query the location information of the calling party from the internally stored location information list according to the caller identity in the request; The information is sent to the location routing device 502.
  • the call session device B 504 is configured to route the INVITE message from the location routing device 502 to the called party according to the called party routing information in the INVITE message.
  • the call session device A 501 may also send the caller identity and the routing information request in the INVITE message to the location server 503 after determining that the location information of the caller is not included in the INVITE message from the calling party, requesting Obtaining the location information of the calling party; receiving the location information from the location server 503, and the INVITE message and the slave
  • the location information obtained by the location server 503 is sent to the location routing device 502 together, requesting to query the routing information of the called party.
  • the location routing device 502 queries the routing information of the called party according to the INVITE message from the call session device A 501 and according to the URN of the called party in the INVITE message and the location information from the call session device A 501. .
  • the location server 503 queries the caller's location information based on the request from the call session device A 501 and based on the caller identity from the call session device A 501; and sends the queried location information to the call session device A 501.
  • the location information of the calling party may be requested by the location routing device 502 from the location server 503, or may be requested by the call session device A 501 from the location server 503.
  • the location server 503 queries the location information of the calling party according to the terminal identifier reported by the calling party as the calling party identifier, and obtains unique location information.
  • the location server 503 queries according to the user identifier reported by the calling party one or more location information can be obtained.
  • the location server 503 can query the location information of the calling party from the internally stored location information list, and can also query the location information of the calling party from other devices in the system.
  • the positioning assistance may be performed according to any one or any combination of information including the terminal identifier of the user and the calling party capability information returned by the location server 503. Information, selecting one of the plurality of location information as the location information of the calling party.
  • the location assistance device is included in the location information.
  • the location routing device 502 queries according to the multiple location information. The routing information of the called party obtains multiple routing information.
  • the location routing device 502 When the location routing device 502 queries multiple routing information, it returns an error message to the call session device A 501, or optionally one of the routing information as the routing information of the called party, or returns a response to the call session device A 501. , requesting the reporting of unique, trusted location information, and Re-query the routing information of the called party.
  • the INVITE message from the calling party includes location information of the calling party.
  • the location routing device 502 and the call session device A 501 do not need to obtain location information from the location server;
  • the location routing device 502 or the call session device A 501 still needs to obtain the location information of the calling party from the location server.
  • FIG. 6 is a flowchart of a location routing method according to Embodiment 2 of the present invention. As shown in FIG. 6, the location routing method in this embodiment includes the following steps:
  • Step 601 The call direction call session device A 501 sends a SIP-based INVITE message, sends an INVITE message to the call session device A 501, and initiates a call to the called party.
  • the initiated service call may be an emergency service call, or a call of a general call service.
  • Step 602 The call session device A 501 sends the caller identifier in the INVITE message and the URN of the called party in the SIP protocol-based routing information request to the location routing device 502 according to the call request of the calling party, requesting to route from the location.
  • the device 502 acquires routing information of the called party.
  • the call session device A 501 since the location information of the calling party is not included in the INVITE message from the calling party, the call session device A 501 does not include the location information of the calling party in the request sent by the location routing device 502; the routing information request is The SIP-based request message may also be a request message based on a protocol such as Diameter protocol, HTTP, etc.; the call session device A 501 directly sends a routing information request to the location routing device 502 according to the call request, or may determine after receiving the call.
  • a protocol such as Diameter protocol, HTTP, etc.
  • routing information of the called party Whether it is possible to obtain the routing information of the called party from the call request, and if the routing information of the called party can be obtained from the call request, directly obtain the routing information Routing information, routing the call to the called party, if the routing information of the called party cannot be obtained from the call request, perform the following steps.
  • Step 603 The location routing device 502 receives a routing information request from the call session device A 501, including the calling party identifier, and determines that the location information of the calling party is not included in the request, and therefore sends the location server 503 with the calling party identifier. Based on the location information request of the PLP protocol, the location information of the calling party is requested to be obtained from the location server 503.
  • Step 604 the location server 503 receives the request from the location routing device, including the caller identity, and queries the location information of the caller from the internally stored location information list according to the caller identity, and sends the queried location information to the location route.
  • the location information request is a message based on the PLP protocol, and may also be a message based on the MLP protocol;
  • the caller identifier is a terminal identifier, and the location server 503 queries the terminal identifier according to the caller identifier as a unique identifier.
  • the location information when the caller ID reported by the caller is a user identifier query, the location server 503 queries the location information according to the user identifier, and then obtains one or more location information.
  • Step 605 The location routing device 502 queries the routing information of the called party according to the unique location information from the location server 503 and the URN of the called party.
  • the queried routing information is also unique routing information.
  • the location routing device 502 selects the location assistance information from any one or any combination of the terminal identifier and the caller capability information returned by the location server, etc. from the plurality of locations. One of the information is selected as the location information of the calling party; the positioning assistance information is included in the location information.
  • the location routing device 502 queries the routing information of the called party according to the multiple location information to obtain multiple routes. information.
  • one of the routing information may be selected as the routing information of the called party, or an error message may be returned to the call session device A 501, and a response may be returned to the call session device A 501, and the call session device A is required to report the uniqueness.
  • trusted location information re-query routing information.
  • Step 606 the location routing device 502 determines to initiate a route to the called party in a proxy manner, and the location routing device 502 replaces the URN in the INVITE message with the URI formed by the routing information, and regenerates the INVITE message according to the INVITE.
  • the routing information in the message routes the INVITE message to the call session device B 504.
  • Step 607 the call session device B 504 routes the INVITE message to the called party according to the routing information in the INVITE message.
  • Step 608 a call connection is successfully established between the calling party and the called party.
  • the call session device A 501 may request the location information of the calling party from the location server 503, and send the obtained location information together with the SIP-based INVITE message to The location routing device 502, such that the process does not perform steps 603 to 604, but after step 602, directly performs step 605, the location routing device 502 according to the URN of the called party and the location information from the call session device A 501 , query the routing information of the called party.
  • the location routing device 502 will perform information interaction with the location server 503 to determine whether the location information is trusted, and if trusted, Then, the location server 503 is not requested to obtain the location information, and the location routing device 502 directly queries the routing information of the called party according to the location information and the URN of the calling party. If the INVITE message sent by the calling party includes the calling party, The location information is then, in step 603, the location routing device 502 will determine whether the location information is trusted by performing information interaction with the location server 503. If not, the trusted location information will still be obtained from the location server 503. Slave When the server 503 obtains the trusted location information, the location routing device 502 queries the routing information of the called party according to the untrusted location information.
  • the location information is location information that can be located.
  • the location routing device 502 reacquires the location information that can be located through the call session device A 501, for example, requests the call session device A. 501 obtains from the initiator, etc.; various identifiers may also not be carried in the request message, but are sent before or after the request message.
  • the call session device may also be divided into the call session device A 501 and the call session device B 504, but the call session device A 501 and the call session device B 504 are implemented by a call session device.
  • the calling party identifier is the terminal identifier of the calling party, and may also be the user identifier of the calling party; the called party identifier is URN, and may also be other information.
  • Location Routing is either proxy or redirected.
  • the calling party and the called party belong to different call session devices, and may also belong to the same call session device.
  • the call session device A 501 and the call session device B 504 may be functional units such as an E-CSCF, an S-CSCF, an I-CSCF, a P-CSCF, an AGCF, a BGCF, an IBCF, an AS, or an MGCF; the location routing device 502 may be an LRF, etc. Functional unit;
  • the location server 503 can be a functional unit such as a GMLC.
  • the location-based routing system, the location routing device, and the location routing method in this embodiment are also applicable to other services except the call service, such as a message service.
  • the calling party and the called party are respectively assigned to different call session devices, and the calling party and the called party can also belong to the same call session device, which constitutes the third embodiment of the present invention.
  • FIG. 7 is a structural diagram of a system based on location routing according to Embodiment 3 of the present invention.
  • the location-based routing system in this embodiment includes: a call session device 701, a location routing device 702, and a location server 703.
  • the user sends a SIP-based INVITE message through the calling party to initiate a call, and the location-based routing system routes the call to the called party, and both the calling party and the called party belong to the call session device 701.
  • the call session device 701 is configured to receive the INVITE message from the calling party, that is, the call request.
  • the called party routing information cannot be obtained from the INVITE message
  • the calling party identifier and the called party's URN in the INVITE message are carried on the Diameter based on the Diameter.
  • the routing information request of the protocol is sent to the location routing device 702, requesting to obtain the routing information of the called party; receiving the routing information response including the routing information from the location routing device 702, replacing the URN in the INVITE message with the routing information in the response Regenerate the INVITE message and route the INVITE message to the called party according to the routing information in the INVITE message.
  • the location routing device 702 is configured to receive a routing information request from the call session device 701, where the request includes the calling party identifier and the URN of the called party. After determining that the location information of the calling party is not included in the request, the location server 703 Sending a location information request including the caller identity, requesting to acquire location information of the caller; receiving location information from the location server 703, and querying from the internally stored routing information list according to the called party's URN and the received location information The routing information of the called party is sent to the call session device 701 by carrying the queried routing information in the routing information response based on the Diameter protocol, after determining that the system performs the location routing in the redirection manner according to the preset setting.
  • a location server 703 configured to receive a location information request from the location routing device 702, including the caller identity; query the location information of the caller from the internally stored location information list according to the caller identity in the request; Sent to location routing device 702.
  • the call session device 701 may also send the caller identifier in the INVITE message to the location information request and send it to the location server 703 after determining that the location information of the caller is not included in the INVITE message from the caller.
  • Get caller The location information is received; the location information from the location server 703 is received, and the caller identifier in the INVITE message, the received location information, and the URN of the called party are carried in the routing information request based on the Diameter protocol and sent to the location routing device 702. Request to obtain routing information of the called party.
  • the location routing device 702 queries the routing information of the called party based on the request from the call session device 701 and based on the URN of the called party in the request message and the location information from the call session device 701.
  • the location server 703 queries the caller's location information based on the request from the call session device 701 and based on the caller identity from the call session device 701; and sends the queried location information to the call session device 701.
  • the location information of the calling party may be requested by the location routing device 702 from the location server 703, or may be requested by the call session device 701 from the location server 703; the location server 703 reports the call according to the calling party.
  • the terminal identifier of the calling party identifier is used to query the location information of the calling party to obtain unique location information.
  • one or more location information may be obtained; the location server 303 The location information of the calling party may be queried from the internally stored location information list, or the location information of the calling party may be queried from other devices in the system; the location information received by the location routing device 702 or the call session device 701 is multiple At the same time, one of the plurality of location information may be selected as the location information of the calling party according to the positioning assistance information including any one or any combination of the user's terminal identifier and the calling party capability information returned by the location server 703; Information is included in the location In the information; when the location information from the location server 703 is multiple, and the location information returned by the location server 703 does not include the location assistance information, the location routing device 702 queries the routing information of the called party according to the multiple location information.
  • the INVITE message from the calling party includes location information of the calling party.
  • the location routing device 702 and the call session device 701 do not need to obtain location information from the location server; when the location information is unavailable At the time of the message, the location routing device 702 or the call session device 701 still needs to obtain the location information of the calling party from the location server.
  • FIG. 8 is a flowchart of a method for location routing according to Embodiment 3 of the present invention. As shown in FIG. 8, the location routing method in this embodiment includes the following steps:
  • Step 801 to step 802 the call direction call session device 701 sends a SIP-based INVITE message to initiate a call request to the called party.
  • the call session device 701 identifies the caller identifier in the INVITE message and the URN of the called party according to the call request. And being sent to the location routing device 702 in the routing information request based on the Diameter protocol, requesting to obtain the routing information of the called party from the location routing device 702.
  • steps 801 to 802 can be the same as the operations of steps 401 to 402 in the first embodiment.
  • Step 803 to step 805, the location routing device 702 receives the routing information request from the call session device 701, including the calling party identifier and the called party URN, and determines that the location information of the calling party is not included in the request, and requests the slave location server.
  • the location routing device 702 queries the routing information of the called party according to the location information from the location server 703 and the URN of the called party.
  • the foregoing steps 803 to 805 can be the same as the operations of steps 403 to 405 in the location routing method of the first embodiment.
  • Step 806 the location routing device 702 determines to initiate a route to the called party in a redirected manner. Therefore, the queried routing information is carried in the routing information response based on the Diameter protocol and sent to the call session device 701.
  • Step 807 the call session device 701 replaces the URN in the INVITE message with the URI composed of the routing information, regenerates the INVITE message, and routes the INVITE message to the called party according to the routing information from the location routing device 702.
  • Step 808 a call connection is successfully established between the calling party and the called party.
  • the routing information request and the routing information response between the call session device 701 and the location routing device 702 are both based on the Diameter protocol information, and may also be request messages based on protocols such as SIP and HTTP.
  • the information exchange through the Diameter protocol is mainly implemented according to the AVP of the Diameter protocol, and is the same as the AVP of the Diameter protocol in the first embodiment, and can also be implemented by other forms.
  • the location information is location information that can be located.
  • the location routing device 702 reacquires the location information that can be located through the call session device 701, for example, requests the call session device 701 to The initiator can obtain the information, and the identifiers are not carried in the request message, but are sent before or after the request message.
  • the proxy mode can also be used.
  • the call is routed to the called party.
  • the call session device 701 sends an INVITE message to initiate the call to the location routing device 702.
  • the location routing device 702 sets the URN in the INVITE message. Replace with the URI consisting of routing information, regenerate the INVITE message, route the call to the called party, and end the process.
  • the calling party identifier is the terminal identifier of the calling party, and may also be the calling party's The user ID; the called party identifier is URN, and may also be other information; the location route adopts the redirection method or the proxy mode; the calling party and the called party belong to the same call session device, and may also belong to different calls.
  • the call session device 701 may be a functional unit such as an E-CSCF, an S-CSCF, an I-CSCF, a P-CSCF, an AGCF, a BGCF, an IBCF, an AS, or an MGCF;
  • the location routing device 702 may be a functional unit such as an LRF;
  • the server 703 may be a functional unit such as a GMLC.
  • the location-based routing system, the location routing device, and the location routing method in this embodiment are also applicable to other services except the call service, such as a message service.
  • the location-based routing system can ensure that the routing information of the receiver is obtained when performing location routing, and can be based on the receiver.
  • the routing information routes the call to the recipient.
  • the embodiment of the present invention further sets an interface protocol for a connection interface between a call session device, a location routing device, and a location server in a location-based routing system, thereby implementing information exchange between the three, so that location-based routing is performed.
  • the system can interact with the information of the location server through the call session device or the location routing device when needed to obtain the location information of the initiator.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Cette invention concerne un système fondé sur l'acheminement d'emplacement, lequel système comprend le dispositif de session d'appel et le dispositif d'acheminement d'emplacement. Le dispositif de session d'appel est utilisé pour recevoir la demande de communication provenant de l'entité appelante puis il envoie au dispositif d'acheminement d'emplacement la demande visant à obtenir les informations d'acheminement du récepteur; le dispositif d'acheminement d'emplacement est utilisé pour rechercher les informations d'acheminement du récepteur sur la base de la demande émanant du dispositif de session d'appel. La présente invention concerne un dispositif d'acheminement d'emplacement et un procédé d'acheminement d'emplacement. L'interaction des informations entre le dispositif de session d'appel et le dispositif d'acheminement d'emplacement permet au système fondé sur l'acheminement d'emplacement d'obtenir les informations d'acheminement du récepteur et de déclencher l'acheminement de l'appel vers le récepteur sur la base des informations d'acheminement du récepteur dans tous les cas.
PCT/CN2007/070511 2006-08-30 2007-08-17 Système fondé sur l'acheminement d'emplacement et procédé et dispositif d'acheminement d'emplacement WO2008028420A1 (fr)

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CN200610127706.X 2006-08-30

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1398103A (zh) * 2001-04-03 2003-02-19 阿尔卡塔尔公司 使用会话启动协议消息中的信息的呼叫路由选择
CN1527559A (zh) * 2003-03-04 2004-09-08 华为技术有限公司 一种向位置服务器查询路由的方法
EP1681894A2 (fr) * 2005-01-12 2006-07-19 Intellprop Limited Appareil et procédé pour services de télécommunication

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Publication number Priority date Publication date Assignee Title
CN100536443C (zh) * 2003-05-22 2009-09-02 华为技术有限公司 一种软交换设备路由查找方法
KR100983981B1 (ko) * 2004-12-03 2010-09-27 엘지에릭슨 주식회사 이동통신 시스템에서 메시지를 이용한 위치서비스제공장치 및 그 방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1398103A (zh) * 2001-04-03 2003-02-19 阿尔卡塔尔公司 使用会话启动协议消息中的信息的呼叫路由选择
CN1527559A (zh) * 2003-03-04 2004-09-08 华为技术有限公司 一种向位置服务器查询路由的方法
EP1681894A2 (fr) * 2005-01-12 2006-07-19 Intellprop Limited Appareil et procédé pour services de télécommunication

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