CN1275406C

CN1275406C - Number carrying method between mobile communication networks

Info

Publication number: CN1275406C
Application number: CN 02136696
Authority: CN
Inventors: 唐小岚; 王炜; 罗圣美
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2002-08-24
Filing date: 2002-08-24
Publication date: 2006-09-13
Anticipated expiration: 2022-08-24
Also published as: CN1477805A

Abstract

The present invention puts forward a number carrying method between mobile communication networks. The method comprises the following steps that a number carrying user is transferred to a special number before an unconditional call is set by the original affiliated network which triggers an instruction to a signaling control point SCP according to the number to query the new call route of the number carrying user; a home location register (HLR) of a CDMA network affiliated by the number carrying user is found out according to the new route; the home location register (HLR) finds out the corresponding relation between the original number of the number carrying user and a user card mark held by the user; the home location register (HLR) saves the corresponding relation between the original number of the number carrying user and the new user card mark to page a new user terminal. The present invention does not need a method of allocating the number portability of new numbers, conveniently realizes the number portability of non-CDMA networks to CDMA networks, and simultaneously saves the number resources of the networks.

Description

A kind of number carrying method between mobile communication networks

Technical field

The present invention relates to CDMA mobile communication system, provide a kind of during, do not need to distribute the number carrying method of new Subscriber Number (MDN) from other communication system to CDMA mobile communication system.

Background technology

Number portability is called for short NP (Number Portability), comprises following implication: number is constant behind the change geographical position, and promptly the user does and still uses original telephone number when called after having changed the geographical position; Number is constant after the change operator: promptly under the environment of multi-operator, the user has changed operator, makes still to use when called original telephone number; The professional back of change number is constant: after the user changes to another kind of business from a kind of business, do and still use original telephone number when called; Number is constant after the changed network, after the user changes to another kind of communication network from a kind of communication network, makes still to use when called original telephone number.

For cdma system, number portability mainly refers to the content of fourth aspect, promptly changes the NP business behind the communication network.

CHINAUNICOM's cdma network open-minded makes CHINAUNICOM become to have simultaneously the communication operator of GSM net and CDMA net.Originally the user of GSM network may select to add cdma network for all considerations, and these users do not wish again to bring all constant to it owing to change the net reversion simultaneously.Therefore, after the user used cdma network instead, wish allowing the user to continue to use former number be its called number, perhaps while caller notification in a period of time, the new digit of this called subscriber telephone-moving.The communication operator of a maturation can not turn a blind eye to the demand of user, and therefore, operator must respond actively technically, seeks feasible technical scheme.

Existing communication network realizes that the mode that number carries roughly has following three kinds:

Mode one, NPDB mode

This mode is to increase a network entity NPDB (number portability database) in mobile communications network, MSC (mobile switching centre) judges at first whether number is the portability number before setting up calling, if, then inquire about NPDB and obtain correct route, finish call setup.One of ANSI series standard IS756 has been described in detail the NPDB mode of cdma network, has defined signaling process and message explanation between MSC and the NPDB.

Mode two, signaling trunking scheme

This mode is to increase a new equipment SRF (signaling relay function) in network, STP (Signalling Transfer Point) sends to SRF to whole or a part of signalings, MNP-SRF inquiry NPDB learns the subscription network of called number, thereby provides correct route for called position enquiring message message SRI.The irrelevant signaling of GSM calling network adopts the signaling trunking scheme in the standard of ETSI, calls out relevant signaling and also can adopt the signaling trunking scheme.

Mode three, Call Forwarding mode

The user adds after the new network, distributes a new number, but still is retained in the number in the former network.In original network, use the unconditioned call connection business, newly assigned number is all transferred in all callings.

All there is certain defective in above implementation, particularly, can be described below:

For mode one, 1) need increase network entity NPDB newly; 2) numbering to Subscriber Number has certain requirement, and the Subscriber Number numbering time is divided into portability number and two kinds of portability numbers not, and whether exchanging function, directly to judge this number from Subscriber Number (MDN) be the portability number; 3) need to increase signaling process.IS756 agreement with cdma network is an example, needs to increase the processing to NP based on signal network REQ.

For mode two, 1) need in all-network, (comprise GSM network, PSTN network, cdma network) and increase network entity NP-SRF, construction cost height not only, and be difficult to realize internetwork coordination; 2) the all-calls signaling has increased unnecessary signaling transfer all via NP-SRF; 3) the all-calls signaling has increased the insecurity of network all via the NP-SRF transfer.

For mode three, it can realize that function is very limited, and specific demands such as changed number notification, former caller ID display can not be provided to the user.

Chinese patent application 02 1 11438.2 has proposed a kind of number based on intelligent network and has carried scheme, this scheme is at the not newly-increased network equipment, do not increase on the basis of extra signaling process, realized that non-cdma network carries function to the number of cdma network, and specific functions such as changed number notification, former caller ID display can be provided to the user.But this scheme requires to redistribute telephone number (MDN) for the user at cdma network, and promptly NP user uses two telephone numbers simultaneously, has caused the nervous and waste of number resource to a certain extent.

Summary of the invention

The present invention proposes the number portability method between a kind of mobile communication system.Adopt the present invention, do not need at the cdma network MDN number new for NP user distributes, NP user does caller and uses original number when called all the time, cdma network is preserved the corresponding relation that NP user's original number and new subscriber card identify (IMSI), find IMSI according to NP user's original number rather than according to MDN, thereby paging is to NP user's new terminal.

The implementation method that number of the present invention carries is summarized as:

The method of the invention mainly realizes at the service switch point of cdma network SSP, signaling control point SCP, attaching position register HLR and moving exchanging center MSC.

NP user is provided with unconditioned call connection to a special number at former belonging network, and as 1330133, cdma network to SCP, is inquired about the new calling route of NP user according to this number triggering command;

According to the attaching position register HLR of this new route querying cdma network under the NP user, search the corresponding relation that NP user's original number and subscriber card that the user holds identify (IMSI) by attaching position register HLR;

Attaching position register HLR preservation NP user's original number and new subscriber card identify the corresponding relation of IMSI, network based this IMSI number, the user terminal that paging is new.

The triggering that service switch point SSP is responsible for instructing.SSP detects special called number (as 1330133), to SCP, to the new routing address of SCP inquiring user, and uses this new routing address to search the called subscriber position to HLR with regard to triggering command ANLYZD.

Signaling control point SCP preserves the corresponding relation of NP user's original number and new calling route.SCP judges that according to special called number the user has activated the NP business after receiving the ANLYZD instruction that SSP sends, the routing address that inquiring user is new (user place CDMA HLR number), and this address returned to service switch point SSP.

Attaching position register HLR preservation NP user's original number and new subscriber card identify the corresponding relation of (IMSI), and this IMSI is passed to NP user place moving exchanging center MSC, and moving exchanging center MSC uses this IMSI paging to user terminal.

After adopting the method for the invention to realize number portability service, compare, needn't increase network entity newly, also needn't increase signaling process newly, saved the number resource of communication network simultaneously with original method.

Description of drawings

Fig. 1 is the flow chart of (as called) of NP calling in the method for the invention:

Embodiment

The present invention mainly takes the IN service mode to realize, its core missions are to utilize the IN service mode that following business function is provided:

Calling function: the new digit that is transferred to NP user to the calling of the original used telephone number of NP user;

The outgoing function: when the user had selected this professional, it was the original telephone number of NP user that NP user works what show when exhaling;

One number: the user uses its original number all the time, no longer is that it distributes new Subscriber Number at cdma network.

NP user does the same domestic consumer of call flow of caller, does not give unnecessary details.Describe NP user in detail at this and make call handling process when called.Fig. 1 is the process step of the present invention about the NP calling.Here suppose that user B will apply for then will finishing following setting from the NP business of GSM net to the telephone-moving of CDMA net:

1) the calling Call Forwarding Unconditional is set to special number (as 1330133) in the user property of user B;

2) preserve the corresponding relation of user's the original number routing address new at NP SCP with it.This new routing address should be the affiliated CDMA HLR number (HLRIN) of NP user;

3) corresponding relation of user's original number and new subscriber card sign IMSI is set at HLR.

In conjunction with the signal of Fig. 1, be example with the number process of carrying from the GSM network to cdma network, the process step of its NP calling is such:

1) switch under NP user's original number that continued is called out in NP calling;

2) switch will be called out unconditional branch to CDMA GMSC/SSP, send the IAI signaling to GMSC/SSP, band original called party number and preceding commentaries on classics institute called number (being special number) extremely in the instruction, and to indicate that this calls out be forwarded calls;

3) SSP triggers the Specific_called_party_digit_string trigger according to special called number, SCP or NP SCP to this locality configuration send the ANLYZD instruction, parameter DMH_REDIND indicates this and calls out and to be forwarded calls in the instruction, and preceding commentaries on classics reason can be 0 or 6;

4) if SCP is NP SCP, then SCP searches NP DB, returns user's new routing iinformation (this information should be the routing address of the HLR of user attaching, as HLRIN), execution in step 6; Otherwise SCP carries out alternately to NP SCP, sends the SERVREQ instruction to NP SCP;

5) NP SCP returns user's new routing iinformation;

6) SCP is placed on this new routing information among the parameters R OUTDIGITS and brings SSP by the anlyzd response;

7) SSP sends LOCREQ instruction as SCCP addressing address to HLR with new routing iinformation, and called number is NP user's original number in the instruction;

8) HLR searches database according to NP user's original number, obtains user's IMSI, thus the IMSI number push away user's MIN number, initiate the ROUTREQ instruction to service MSC;

9) service MSC returns roaming number;

10) SSP is accomplished to called subscriber's call proceeding according to this roaming number.

For the ease of understanding the present invention, the Chinese note that shows the english abbreviation that will occur among the present invention is listed:

MSC: mobile switching centre

HLR: attaching position register

GMSC: gateway MSC

SSP: service switch point

SCP: signaling control point

NP: number portability

Following signaling is abridged from ANSI41 and is771 agreement:

LOCREQ: position requests

Locreq: position request response

ROUTREQ: route requests

Routreq: route requests response

ANLYZD: information analysis request

Anlyzd: information analysis response

SERVREQ: service request

Servreq: service response

Claims

1, a kind of number carrying method between mobile communication networks, realize Signalling exchange control by service switch point SSP, signaling control point SCP, attaching position register HLR and the moving exchanging center MSC of mobile communication network, it is characterized in that, it is that IN service triggers sign indicating number that new network SSP is provided with a particular number, also comprises the steps:

(1) ported subscriber is provided with the particular number of unconditioned call connection to described new network at former belonging network;

(2) new network SSP receive to particular number go into to exhale after, triggering command is to signaling control point SCP, enquiry number carries the new calling route of user;

(3) SSP is searched the corresponding relation of ported subscriber original number and subscriber card that the user holds sign IMSI according to the attaching position register HLR of this new calling route querying cdma network under the ported subscriber by attaching position register HLR;

(4) the attaching position register HLR original number of preserving ported subscriber and new subscriber card identify the corresponding relation of IMSI, network based this IMSI number, the user terminal that paging is new.

2, number carrying method according to claim 1, it is characterized in that, in the described step (2), behind the particular number that changes before service switch point SSP detects, triggering command ANLYZD is to signaling control point SCP, to the new routing address of signaling control point SCP inquiring user, and use this new routing address to search the called subscriber position to attaching position register HLR.

3, number carrying method according to claim 1 and 2, it is characterized in that, the described corresponding relation of searching ported subscriber original number and subscriber card that the user holds sign IMSI comprises: after signaling control point SCP receives the ANLYZD instruction of service switch point SSP transmission, judge that according to special called number the user has activated number portability service, the routing address that inquiring user is new, and this address returned to service switch point SSP.

4, number carrying method according to claim 1 and 2 is characterized in that, the calling route that described ported subscriber is new comprises user place CDMA HLR number.

5, number carrying method according to claim 1, it is characterized in that, in the described step (4), attaching position register HLR identifies the Visited Mobile Switching Center MSC that IMSI passes to the ported subscriber place with new subscriber card, and Visited Mobile Switching Center MSC uses this IMSI paging to user terminal.