CN1581988A

CN1581988A - Method for realing network optimization in mobile communication system

Info

Publication number: CN1581988A
Application number: CN 03140055
Authority: CN
Inventors: 蔡安; 何伟; 朱龙明
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2003-08-03
Filing date: 2003-08-03
Publication date: 2005-02-16
Anticipated expiration: 2023-08-03
Also published as: CN1275479C

Abstract

The disclosed method includes steps: setting up frequency point of attribution network in terminal; at boot-strap, searching frequency point of attribution network set up first; then searching frequency point of other networks; if modulating out the signal of attribution network, the terminal locks up the attribution network; if there are no enough strong signals from all attribution networks, then, the terminal locks up other network. Comparing with prior art, the invention through determination of SID and NID realizes optimization network by setting up frequency points of attribution networks at terminal so as to prevent influence of shutting down and restarting computer on users.

Description

A kind of network preferable methods that in mobile communication system, realizes

Technical field

The present invention relates to mobile communication system, especially relate to the method for the preferred a certain network of portable terminal under multiple network covers.

Background technology

Along with the fast development of mobile communication technology, it gives the daily study of people, brought convenient that live also displays day by day, promotes the appearance of some new operators and new network.The user not only can obtain more the selection and service, but also can be at different inter-network roamings, to obtain good service, particularly coverage effect.The operator can also provide some special-purpose network services according to some specific customer requirements except some public network services are provided, such as some secure service etc.Covering area at a plurality of networks, the user with one of them network as the main separation home network, other network replenishes as service, the angelica network does not have under the situation of signal covering, use other network service, behind the signal that searches home network again, can the preferential automatically network of selecting ownership.Such network modes can run into a problem inevitably, and promptly how portable terminal works in two networks.In some mobile communication system ground standard agreement, as the agreement of CDMA, stipulated to realize how terminal realizes roaming and the process of switching in two networks, but ignored when two networks cover areal simultaneously, how the problem of preferred network.That is:

1) in the zone of having only home network to cover, the signal of terminal locking home network;

2) in the zone that does not have the home network signal to cover, terminal locking CDMA mobile network signals;

3) in home network and the common overlay area of other networks, terminal preferentially locks the home network signal;

Specific to user's use, following three kinds of situations are arranged:

1) when terminal gradually when leaving regional mobile that home network covers, the signal of home network can progressively weaken, according to CDMA agreement regulation, terminal searching is to other network signals, roaming enters other nets;

2) when terminal gradually from blind area that home network covers when the home network area of coverage moves, if in the overlay area of home network, the signal of other networks a little less than, terminal can enter the zone that home network covers according to the standard agreement roaming;

3) when terminal gradually from blind area that home network covers to home network cover regional mobile the time, if in the overlay area of home network, terminal can demodulate the information of home network, even the signal strength signal intensity of other networks is very strong, also should turn back to home network again.But press the CDMA standard protocol specifies, in this case, terminal can not enter in the home network again automatically, unless user's cycle power.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of method, only need simply revise at terminal part, just can realize not needing terminal closedown to restart, can be in the roaming in two different networks, and preferentially select home network.

In order to realize purpose of the present invention, realization network preferable methods of the present invention comprises: the frequency of setting home network in terminal, at first search for the frequency of the home network of setting during start, and then search for the frequency of other networks, if terminal can demodulate the signal of home network, then lock home network; When if the frequency of all home network does not have enough strong signal, locks up other network again.

Method of the present invention, described terminal can also comprise behind the locking network signal:

1) judges according to system parameters system banner (SID) that searches and network identity (NID) that if the terminal use is the signal of home network, then terminal is in normal holding state;

2) judge according to the system parameters SID that searches and NID that if terminal uses is not the home network signal, and terminal is in holding state, then whether the terminal signal of searching for the home network of storing fast again on the UIM card exists;

3) judge according to system parameters SID that searches and NID, if what terminal was used is not the home network signal, and be in calling or talking state, do not do any operation, behind end of conversation, whether terminal is searched for the home network signal of storing fast again and is existed on the UIM card.

Compared with prior art, the method for the invention only need be set the frequency of home network in terminal, then by the judgement of SID and NID, can realize that network is preferred, has avoided terminal closedown to restart influence to the user.

Embodiment

Below in conjunction with embodiment the present invention is described, so that those skilled in the art more clearly grasps this method.

With the cdma network is example, mobile communication system of the present invention comprises, comprise BTS (base station transceiver), BSC (base station controller), MSC/VLR (mobile switching center), HLR/AUC (attaching position register/AUC), and the relation between other networks can be two mobile networks that belong between the different operators, as public cdma network, and big customer's dedicated network of some operator.

Suppose that the preferred network of terminal is a dedicated network in the zone of public cdma network and the covering of aforesaid dedicated network, method of the present invention comprises:

In terminal, set the frequency of home network, at first search for the frequency of the home network of setting during start, and then search for the frequency of other networks,, then lock home network if terminal can demodulate the signal of home network; When if the frequency of all home network does not have enough strong signal, locks up other network again.

Terminal can also judge that if the terminal use is the signal of home network, then terminal is in normal holding state according to system parameters SID that searches and NID behind the locking network signal; If what terminal was used is not the signal of home network, and terminal is in holding state, and then whether the terminal signal of searching for the home network of storing fast again on the UIM card exists; If what terminal was used is not the home network signal, and terminal is in calling or talking state is not then done any operation up to end of conversation, and whether terminal is searched for the home network signal of storing fast again and existed on the UIM card.

Terminal is searched for the flow process whether the home network signal stored exist fast again and is comprised on the UIM card:

1) starting terminal timer.

2) if timer expiry contrasts SID and NID, if end in common network, carried out for the 4th step; Otherwise, the replacement timer.

3) judge whether the user is under the holding state, if, then start timer, carried out for the 4th step; If not, carried out for the 6th step.

4) the frequency tabulation in the search dedicated network.

5) if having the pilot tone that exists in the pilot signal in the tabulation now, then terminal locking home network signal returns the use dedicated network from common network; If there is not the pilot tone of common network, the timer of then resetting;

6) behind the end of conversation, redirect carried out for the 4th step.

Consider that terminal can have influence on user's caller and called flow to the search again of signal, can cause the failure of calling, particularly increased the possibility that the user can't pagedly arrive; The simultaneously this process of search again also can expend extra energy, reduces the standby time of terminal, therefore, has taked following technical scheme to address these problems in the present invention:

(1) Hua Fei time.If this process of searching for the home network signal again is the same with start process, the foremost of tabulating from frequency begins to search for one by one, and the influence that the user is caused is huge, so this method is only searched for the frequency of the specific use of home network.Because the carrier frequency number of a net use is few,, almost allow the user not have sensation so the time of this search cost is short especially.

(2) length of timer.If the time that timer is set is longer, the user can't return automatically from the long period that civilian network is got back in the home network area of coverage, did not so just deal with problems; If the time of setting is too short, terminal can ceaselessly be searched for the home network signal, not only can cause terminal ground battery consumption too fast, makes troubles to the user, and the user normally makes a phone call and call accepted ground success rate but also can badly influence.In the present embodiment, length of timer can be set in 2-5 minute, to satisfy the needs of above-mentioned two aspects.

Claims

1, a kind of network preferable methods that in mobile communication system, realizes, it is characterized in that comprising: the frequency of in terminal, setting home network, at first search for the frequency of the home network of setting during start, and then search for the frequency of other networks, if terminal can demodulate the signal of home network, then lock home network; When if the frequency of all home network does not have enough strong signal, locks up other network again.

2, method according to claim 1 is characterized in that: described terminal can also comprise behind the locking network signal:

1) judges according to system parameters system banner SID that searches and network identity NID that if the terminal use is the signal of home network, then terminal is in normal holding state;

3, method according to claim 2 is characterized in that: described terminal is searched for the flow process whether the home network signal stored exist fast again and is comprised on the UIM card:

1) starting terminal timer;

2) if timer expiry contrasts SID and NID, if end in the non-attribution network, carried out for the 4th step; Otherwise, the replacement timer;

3) judge whether the user is under the holding state, if, then start timer, carried out for the 4th step; If not, carried out for the 6th step;

4) the frequency tabulation in the search home network;

5) if having pilot tone in the tabulation in the existing pilot signal, then terminal locking home network signal returns the use home network from the non-attribution network; If there is not the pilot tone of home network, the timer of then resetting;

6) behind the end of conversation, redirect carried out for the 4th step.