CN104902540A - VoLTE scene-based method for acquiring user access location information at network side - Google Patents
VoLTE scene-based method for acquiring user access location information at network side Download PDFInfo
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- CN104902540A CN104902540A CN201510207051.6A CN201510207051A CN104902540A CN 104902540 A CN104902540 A CN 104902540A CN 201510207051 A CN201510207051 A CN 201510207051A CN 104902540 A CN104902540 A CN 104902540A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W48/16—Discovering, processing access restriction or access information
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Abstract
The invention discloses a VoLTE scene-based method for acquiring user access location information at a network side. The method includes the following steps that: when receiving a calling party invite call request, a proxy call session control function (P-CSCF) inquires the user access location information from a policy and charging rule function (PCRF) without waiting for a location information query and acquisition process of the PCRF, and directly forwards the invite call request to a subsequent network element; and when the PCRF feeds back the user access location information to the P-CSCF after querying a policy and charging enforcement function (PCEF), and the P-CSCF notifies the subsequent network element through carrying the user access location information by a re-invite massage, so that the subsequent network element can execute different policies according to the user access location information. With the method of the invention adopted, waiting for a location information acquiring process of the PCRF and PCEF is not required, so that invite call request get-through delay can be greatly shortened, and therefore, service experience and feelings of users can be improved.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of based under Long Term Evolution access network scene, IP Multimedia System is the method that the service request such as user speech obtain user's accessing position information, and specifically a kind of VoLTE scene network side obtains the method for user's accessing position information.
Background technology
VoLTE (Voice over LTE) refers to that terminal use is through long-term evolving network (Long Term Evolution, be called for short LTE) access packet-based core networks (Evolved Packet Core, be called for short EPC), again by IP Multimedia System network (IP Multimedia Subsystem, be called for short IMS) for user provides high-quality sound, video traffic.VoLTE on 4G network, realizes data and the unification of speech business under consolidated network without the need to the whole service bearer of 2G/3G network.LTE is a kind of access network, and EPC provides carrying for voice-and-data business, and IMS network then provides the basic supplementary service of voice/video.
It is exactly that to connect the stand-by period shorter that VoLTE technology brings that user the most directly experiences, and more high-quality, more natural voice and video telephone effect.VoLTE and 2G, 3G voice call are essentially different, VoLTE because adopt high-resolution encoding and decoding technique voice quality comparatively 2G, 3G voice call can improve about 30%.VoLTE is that user brings lower call through time delay (to the time of called terminal ringing after caller dialing), falls 50%, VoLTE connect time delay probably in 1-2 second than 3G, and the 2G epoch connect time delay in 6-7 second.
In VoLTE business, some scene of IMS network needs to perform special strategy according to the accessing position information of user, such as: it is preferential that (1) operator needs to realize rate to the speech business of certain Administrative Area user; (2) EC needs to know the particular location that user carries out emergence call service; (3) customer complaint audio call to set up after failure or call setup call drop suddenly, and operator needs to know user's accessing position information, to improve access network.
The accessing position information of user, not only comprises the type of access network, also needs to comprise more detailed cell information, comprising: Tracking Area Identifier RAI, Cell Global Identity CGI, Service Area Identifier SAI.RAI is by Global Mobile Country Code (Mobile Country Code, be called for short MCC) and mobile service network code (Mobile Network Code, be called for short MNC) and location area code (Location Area Code, be called for short LAC) and Routing Area code (Route Area Code, be called for short RAC) composition, for the Routing Area of one or more community of unique mark composition.CGI is then by MCC/MNC/ cell ID (Cell Identity is called for short CI) composition, Shi Yige community unique identification in the world.SAI is made up of, for identifying one or more cell information of same position MCC/MNC/LAC and service region code (Service Area Code is called for short SAC).
The positional information of carrying due to terminal is insincere, therefore 3rd Generation Partnership Project (3rd Generation Partnership Project is called for short 3GPP) has defined the method that VoLTE business network side obtains user's accessing position information.
The VoLTE business network side of 3GPP definition obtains the Major Systems framework of user's accessing position information with reference to figure 1, comprise following entity: (101) application layer (Application Function, be called for short AF) network entity, be often referred to proxy call conversation control function entity in IMS network (Proxy Call Session Control Function is called for short P-CSCF); (102) policy charging rule function (Policy and Charging Rule Function is called for short PCRF), is responsible for the acquisition of policy control and charging regulation and notifies PCEF; (103) policy and charging enforcement function (Policy and Charging Enforcement Function is called for short PCEF), is responsible for the execution of policy control, also comprises the acquisition of user's accessing position information; (104) access network, generally includes the NodeB(Evolved Node B of Mobility Management Entity (Mobility Management Entity, be called for short MME) and evolution, abbreviation eNodeB) etc. entity.
The basic procedure that VoLTE business network side obtains user's accessing position information is: P-CSCF is to PCRF inquiring user accessing position information, PCRF is to PCEF inquiring user accessing position information, after PCEF obtains user's accessing position information from access network, inform PCRF by Gx interface message, and then the positional information of user is informed P-CSCF by PCRF.The P-CSCF of such IMS network just obtains the positional information of user, and transmits in the ims network, so that other network element of IMS network obtains and uses this positional information.For Calling Side flow process, the flow process of the acquisition positional information of 3GPP definition as shown in Figure 2, comprises following committed step:
S201, P-CSCF receive invite request corresponding to voice/video calling;
S202, P-CSCF initiates Diameter AAR(AA-Request to PCRF, be called for short AAR) request, this request is mainly used in the foundation of dedicated bearing, carry the characteristic value of Specific-Action to (Attribute-Value Pair in request message simultaneously, be called for short AVP), the content of AVP extends this as " ACCESS_NETWORK_INFO_REPORT ", represents that PCRF needs the accessing position information of report of user.Comprise Required-Access-Info AVP in AAR request simultaneously, represent that P-CSCF subscribes to positional information to PCRF;
S203, PCRF return Diameter AAA(AA-Answer to P-CSCF, are called for short AAA) response.Carried the access style of user in response message by " IP-CAN-Type " or " RAT-Type ", as GERAN/UTRAN-FDD/UTRAN-TDD/E-UTRAN-FDD/E-UTRAN-TDD, but there is no concrete cell identity information.Only according to access style, IMS network cannot perform the relevant strategy of specific position;
S204, PCRF send Diameter RAR request (Re-Auth-Request is called for short RAR) to PCEF, and instruction PCEF needs reporting position information;
S205, PCEF return Diameter RAA to PCRF and respond (Re-Auth-Answer is called for short RAA), as the response to request;
S206, PCEF and access network obtain user's accessing position information alternately, and user's accessing position information generally includes: Cell Global Identity CGI or Service Area Identifier SAI or Tracking Area Identifier RAI.
S207, PCEF sends Diameter CCR to PCRF and asks (Credit-Control-Request, be called for short CCR), by 3GPP-User-Location-Info and/or User-Location-Info-Time AVP in request message, carry the positional information that user is concrete;
S208, PCRF return Diameter CCA to PCEF and respond (Credit-Control-Answer is called for short CCA), as the response of CCR request;
S209, PCRF send Diameter RAR request to P-CSCF, in request message by 3GPP-User-Location-Info and or 3GPP-SGSN-MCC-MNC AVP carry the concrete positional information of user;
S210, P-CSCF return Diameter RAA to PCRF and respond;
S211, user's accessing position information that P-CSCF obtains from PCRF according to S209 step, structure P-Access-Network-Info head field is also inserted in invite request message, user's accessing position information is contained in this field, P-CSCF by invite request forward to follow-up network element so that other network elements use user accessing position information to perform corresponding strategy.
The network side of current 3GPP definition obtains the method for user's accessing position information, there are serious problems, call through time delay can be added exactly, because invite message related to calls is through P-CSCF network element, P-CSCF network element needs inquiry PCRF, PCRF and then inquiry PCEF, P-CSCF to need etc. after user's accessing position information to be obtained could forwarded call request, this must need to consume certain hour, adds call through time delay.VoLTE technology one spotlight is exactly lower call through time delay, and the method for the user of network side acquisition at present accessing position information will inevitably increase call through time delay, affects customer service and experiences.
Summary of the invention
Technical problem to be solved by this invention is the present situation for above-mentioned prior art, and provide a kind of VoLTE scene network side to obtain the method for user's accessing position information, the method had both achieved the acquisition of user's accessing position information, also reduce call through time delay simultaneously, thus improve customer service experience.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of VoLTE scene network side obtains the method for user's accessing position information, the method is for when P-CSCF receives caller invite call request, P-CSCF is not waiting for the query script of PCRF while PCRF inquiring user accessing position information, forwards invite call request directly to follow-up network element; When after PCRF inquiry PCEF, also feedback user accessing position information is to P-CSCF, P-CSCF carries user's accessing position information by reInvite message again and notifies follow-up network element, can perform different strategies to make follow-up network element according to user's accessing position information.
For optimizing technique scheme, the measure taked also comprises:
After above-mentioned P-CSCF receives caller invite call request, dedicated bearing is set up by AAR request notice PCRF, need not wait for that PCRF returns user's accessing position information, namely P-CSCF forwards invite call request to follow-up network element, does not carry user's accessing position information in invite call request message.
After P-CSCF receives the AAA response that PCRF returns, only have access network type in AAA response message, P-CSCF then forwards invite call request at once; If carried user's accessing position information in the invite call request that P-CSCF receives, P-CSCF can determine whether forward positional information to follow-up network element according to local policy.
PCRF continues the positional information to PCEF inquiring user after receiving the AAR request of P-CSCF, when PCRF receives user's accessing position information of PCEF feedback, notifies P-CSCF network element.
Above-mentioned access network type comprises GERAN/UTRAN-FDD/UTRAN-TDD/E-UTRAN-FDD/E-UTRAN-TDD type; Above-mentioned user's accessing position information comprises the concrete positional information of Tracking Area Identifier RAI, Cell Global Identity CGI and Service Area Identifier SAI.
After P-CSCF receives user's accessing position information of PCRF feedback, structure reinvite request, carry P-Access-Network-Info head field in request, this field carries user's accessing position information.
When having carried user's accessing position information in initial invite call request, and user's accessing position information that PCRF returns is consistent with the user's accessing position information carried in initial invite call request, P-CSCF need not send reinvite message to the follow-up network element of IMS network.
Follow-up network element receives the reinvite request that P-CSCF sends, and when increasing newly in reinvite request or have modified P-Access-Network-Info content, follow-up network element needs the strategy relevant according to new user's accessing position information executing location.
Above-mentioned follow-up network element comprises ATCF, I/S-CSCF, MMTEL AS network element.
User's accessing position information that above-mentioned PCRF returns is carried by 3GPP-User-Location-Info or 3GPP-SGSN-MCC-MNC AVP.
Compared with prior art, the present invention is when P-CSCF receives caller invite call request, P-CSCF of the present invention directly forwards invite call request simultaneously to PCRF inquiring user accessing position information, P-CSCF does not wait for the query script of PCRF, when after PCRF inquiry PCEF, also feedback user accessing position information is to P-CSCF, P-CSCF carries user's accessing position information by reInvite message again and notifies follow-up network element, because P-CSCF no longer waits for PCRF/PCEF position enquiring process, thus shorten VoLTE calling establishment time delay.The present invention can realize network side and obtain user's accessing position information, the program is due to the process without the need to waiting for PCRF/PCEF acquisition positional information simultaneously, thus substantially reduce invite call request and connect time delay, thus business experience and the impression of user can be improved.
Accompanying drawing explanation
Fig. 1 is that known VoLTE user's accessing position information obtains system architecture diagram;
Fig. 2 is that known VoLTE obtains user's accessing position information flow chart;
Fig. 3 is that VoLTE of the present invention obtains user's accessing position information scheme committed step figure;
Fig. 4 is that VoLTE of the present invention obtains user's accessing position information protocol procedures figure.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
As shown in Figure 3 and Figure 4, a kind of VoLTE scene network side of the present invention obtains the method for user's accessing position information, it is characterized in that: the method is for when P-CSCF receives caller invite call request, P-CSCF is not waiting for the query script of PCRF while PCRF inquiring user accessing position information, forwards invite call request directly to follow-up network element; When after PCRF inquiry PCEF, also feedback user accessing position information is to P-CSCF, P-CSCF carries user's accessing position information by reInvite message again and notifies follow-up network element, can perform different strategies to make follow-up network element according to user's accessing position information.
After P-CSCF receives caller invite call request, dedicated bearing is set up by AAR request notice PCRF, need not wait for that PCRF returns user's accessing position information, namely P-CSCF forwards invite call request to follow-up network element, does not carry user's accessing position information in invite call request message.
After P-CSCF receives the AAA response that PCRF returns, only have access network type in AAA response message, P-CSCF then forwards invite call request at once; If carried user's accessing position information in the invite call request that P-CSCF receives, P-CSCF can determine whether forward positional information to follow-up network element according to local policy.
PCRF continues the positional information to PCEF inquiring user after receiving the AAR request of P-CSCF, when PCRF receives user's accessing position information of PCEF feedback, notifies P-CSCF network element.
Access network type comprises the access styles such as GERAN/UTRAN-FDD/UTRAN-TDD/E-UTRAN-FDD/E-UTRAN-TDD; Described user's accessing position information comprises the concrete positional information such as Tracking Area Identifier RAI, Cell Global Identity CGI and Service Area Identifier SAI.
After P-CSCF receives user's accessing position information of PCRF feedback, structure reinvite request, carry P-Access-Network-Info head field in request, this field carries user's accessing position information.
When having carried user's accessing position information in initial invite call request, and user's accessing position information that PCRF returns is consistent with the user's accessing position information carried in initial invite call request, P-CSCF need not send reinvite message to the follow-up network element of IMS network.
Follow-up network element receives the reinvite request that P-CSCF sends, and when increasing newly in reinvite request or have modified P-Access-Network-Info content, follow-up network element needs the strategy relevant according to new user's accessing position information executing location.
Follow-up network element comprises ATCF, I/S-CSCF, MMTEL AS network element.
User's accessing position information that PCRF returns is carried by 3GPP-User-Location-Info or 3GPP-SGSN-MCC-MNC AVP.
The present invention mainly comprises three steps as shown in Figure 3:
After S301:P-CSCF receives invite call request, dedicated bearing is set up by AAR request notice PCRF, need not wait for that PCRF returns the concrete accessing position information of user, P-CSCF forwards invite and asks, to follow-up network element, not carry user's accessing position information in invite request message.
S302:PCRF continues the positional information to PCEF inquiring user after receiving P-CSCF AAR request, when PCRF receives user's accessing position information of PCEF feedback, notifies P-CSCF network element.
After S303:P-CSCF receives the positional information of PCRF feedback, structure reinvite request, carry P-Access-Network-Info head field in request, this field carries user's accessing position information, comprises access network type and concrete accessing position information.
Detailed step flow process of the present invention as shown in Figure 4, the present invention is when P-CSCF receives caller invite call request, do not wait for that PCRF returns user's accessing position information, directly forward invite call request, when PCRF inquires about PCEF feedback user accessing position information to P-CSCF, P-CSCF carries user's accessing position information by reInvite message again and notifies follow-up network element.Thus achieve network side acquisition positional information, because P-CSCF no longer waits for PCRF/PCEF position enquiring process, thus shorten VoLTE calling establishment time delay.Concrete step is described as follows:
S401:P-CSCF receives Client-initiated invite call request;
S402:P-CSCF sends AAR request to PCRF, requires to set up dedicated bearing, needs instruction PCRF to return user's accessing position information in Specific-Action AVP simultaneously;
S403:PCRF constructs to P-CSCF and sends AAA response, only has access network type, do not have concrete positional information in AAA response message;
S404:P-CSCF forwards invite call request to follow-up network element, and follow-up network element comprises the network elements such as ATCF, I/S-CSCF, MMTEL AS, does not carry user's accessing position information in request message; If carried user's accessing position information in the invite request that P-CSCF receives, P-CSCF can determine whether forward positional information to follow-up network element according to local policy;
S405:PCRF sends RAR request to PCEF, booking reader's accessing position information;
S406:PCEF returns RAA response to PCRF;
S407:PCEF access network is mutual, obtains user's accessing position information;
S408:PCEF to PCRF send CCR request, in request message by 3GPP-User-Location-Info and or 3GPP-SGSN-MCC-MNC AVP carry user's accessing position information;
S409:PCRF returns CCA response to PCEF;
S410:PCRF to P-CSCF construct and send RAR request, in request message by 3GPP-User-Location-InfoAVP and or 3GPP-SGSN-MCC-MNC AVP carry user's accessing position information;
S411:P-CSCF returns RAA response to PCRF;
Reinvite request in the dialogue of S412:P-CSCF structure, carry P-Access-Network-Info head field in request, this field carries the user's accessing position information obtained from PCRF, comprises access network type and concrete positional information; If carried user's accessing position information in initial invite call request, and the positional information that PCRF returns is consistent with the positional information of carrying in initial invite call request, and so P-CSCF need not send reinvite message to follow-up network element.According to SIP(Session Initial Protocol, be called for short SIP) protocol requirement, after P-CSCF structure reinvite request needs to wait for that P-CSCF receives the response of initial invite call request, if also do not receive the response of initial invite call request, P-CSCF needs to wait for, initiates reinvite request after a while again.
In sum, adopt the inventive method, network side can be realized and obtain user's accessing position information, shorten call through time delay simultaneously, substantially increase business experience and the impression of user.Above example only illustrates calling procedure, called flow and calling procedure similar, technique scheme is equally applicable to called flow, repeats no more.
The above, be only preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for a VoLTE scene network side acquisition user accessing position information, it is characterized in that: the method is for when P-CSCF receives caller invite call request, P-CSCF is not waiting for the query script of PCRF while PCRF inquiring user accessing position information, forwards invite call request directly to follow-up network element; When after PCRF inquiry PCEF, also feedback user accessing position information is to P-CSCF, P-CSCF carries user's accessing position information by reInvite message again and notifies follow-up network element, can perform different strategies to make follow-up network element according to user's accessing position information.
2. a kind of VoLTE scene network side according to claim 1 obtains the method for user's accessing position information, it is characterized in that: after described P-CSCF receives caller invite call request, dedicated bearing is set up by AAR request notice PCRF, need not wait for that PCRF returns user's accessing position information, namely P-CSCF forwards invite call request to follow-up network element, does not carry user's accessing position information in invite call request message.
3. a kind of VoLTE scene network side according to claim 2 obtains the method for user's accessing position information, it is characterized in that: after P-CSCF receives the AAA response that PCRF returns, only have access network type in AAA response message, P-CSCF then forwards invite call request at once; If carried user's accessing position information in the invite call request that P-CSCF receives, P-CSCF can determine whether forward positional information to follow-up network element according to local policy.
4. a kind of VoLTE scene network side according to claim 3 obtains the method for user's accessing position information, it is characterized in that: after PCRF receives the AAR request of P-CSCF, continue the positional information to PCEF inquiring user, when PCRF receives user's accessing position information of PCEF feedback, notify P-CSCF network element.
5. a kind of VoLTE scene network side according to claim 4 obtains the method for user's accessing position information, it is characterized in that: described access network type comprises GERAN/UTRAN-FDD/UTRAN-TDD/E-UTRAN-FDD/E-UTRAN-TDD type; Described user's accessing position information comprises the concrete positional information of Tracking Area Identifier RAI, Cell Global Identity CGI and Service Area Identifier SAI.
6. a kind of VoLTE scene network side according to claim 5 obtains the method for user's accessing position information, it is characterized in that: after P-CSCF receives user's accessing position information of PCRF feedback, structure reinvite request, carry P-Access-Network-Info head field in request, this field carries user's accessing position information.
7. a kind of VoLTE scene network side according to claim 6 obtains the method for user's accessing position information, it is characterized in that: when having carried user's accessing position information in initial invite call request, and user's accessing position information that PCRF returns is consistent with the user's accessing position information carried in initial invite call request, P-CSCF need not send reinvite message to the follow-up network element of IMS network.
8. a kind of VoLTE scene network side according to claim 7 obtains the method for user's accessing position information, it is characterized in that: follow-up network element receives the reinvite request that P-CSCF sends, when increasing newly in reinvite request or have modified P-Access-Network-Info content, follow-up network element needs the strategy relevant according to new user's accessing position information executing location.
9. a kind of VoLTE scene network side according to claim 8 obtains the method for user's accessing position information, it is characterized in that: described follow-up network element comprises ATCF, I/S-CSCF, MMTEL AS network element.
10. a kind of VoLTE scene network side according to claim 9 obtains the method for user's accessing position information, it is characterized in that: user's accessing position information that described PCRF returns is carried by 3GPP-User-Location-Info or 3GPP-SGSN-MCC-MNC AVP.
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| CN111263292B (en) * | 2018-11-30 | 2021-07-27 | 中国电信股份有限公司 | Communication service processing method, device, system and computer readable storage medium |
| CN114095890A (en) * | 2020-08-25 | 2022-02-25 | 中国移动通信集团吉林有限公司 | VoLTE user position determining method and device and electronic equipment |
| CN114095890B (en) * | 2020-08-25 | 2023-09-19 | 中国移动通信集团吉林有限公司 | VoLTE user position determining method and device and electronic equipment |
| CN117119381A (en) * | 2023-02-23 | 2023-11-24 | 荣耀终端有限公司 | Position information reporting method, electronic equipment and storage medium |
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