Summary of the invention
Technical problem to be solved by this invention is to experience reduction in order to overcome network quality decline and the user that method for sharing network load causes in the above-mentioned prior art, and the defective of aspect such as cell selecting and cell reselection parameters be single, a kind of method for sharing network load is provided, has comprised:
Step 1, terminal first attached are selected service network to network;
Step 2, terminal have the described service network of many cover cell selection information from broadcasting according to preferential access network attribute information, read and described terminal corresponding district is selected parameter, and are persistent district by calculating the sub-district of selecting to meet the resident standard in sub-district; Described step 2 comprises: step 21, terminal are according to described preferential access network attribute information, have the described service network of many cover cell selection information from broadcasting, read a cover current area cell selecting parameter corresponding with described terminal, and judge by calculating whether described current area is the sub-district that meets the resident standard in sub-district, if, then described current area is a persistent district, execution in step 3; Otherwise, execution in step 22; Step 22, terminal are according to described preferential access network attribute information, have the described service network of many cover cell selection information from broadcasting, read the described current area adjacent area cell selecting parameter corresponding with described terminal, and by calculating to judge whether there is the sub-district that meets the resident standard in sub-district in the described adjacent area, if, the then described sub-district that meets the resident standard in sub-district is a persistent district, execution in step 3; Otherwise, execution in step 23; Whether step 23, described terminal search for the sub-district of current service network finishes, if then execution in step 24; Otherwise then execution in step 21; Step 24, terminal gravity treatment service network return execution in step 21;
Step 3, terminal reside in described persistent district, the line position of going forward side by side registration; Step 4, terminal is under idle pulley, according to described preferential access network attribute information, have the described service network of many cover cell selection information from broadcasting, read a cover cell reselection parameters corresponding with described terminal, and compare by the network signal relevant parameter that records with terminal, carry out the sub-district gravity treatment according to the sub-district reselection criterion, the sub-district of selecting to meet resident standard is a persistent district; Step 5, terminal reside in described persistent district, the line position of going forward side by side registration.Among the present invention, terminal is according to preferential access network attribute information, have the service network of many cover cell selection information from broadcasting, reading corresponding district selects parameter and cell reselection parameters to carry out cell selecting and sub-district gravity treatment, thereby realize that different terminals resides in the different districts according to its attribute difference, in cell selecting and cell reselection process, realize sharing network load, whole process, network quality and customer service are experienced not influence, and realization is simple and success rate is high.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The sharing network load that the present invention relates to, network is meant public land mobile net (Public LandMobile Network, hereinafter to be referred as PLMN), comprise between GSM (Global System forMobile Communication) network and WCDMA (Wideband Code Division MultipleAccess) network between the heterogeneous networks, between WCDMA network and TD-SCDMA network, between WCDMA and LTE (Long TermEvolution) network etc.
Fig. 1 is an embodiment flow chart of method for sharing network load of the present invention, comprising: step 1, terminal first attached are selected service network PLMN to network.The terminal first attached arrives network, in cell search process, and terminal (User Equipment, letter UE) obtain relevant information and read broadcast channel message. read broadcast message, judge whether the current PLMN that finds is the PLMN that will look for, if UE then directly enters the cell selecting process; Otherwise UE seeks next frequency network, carries out the PLMN gravity treatment.
Step 2, terminal are according to preferential access network attribute information, have the described service network of many cover cell selection information from broadcasting, read corresponding with a described terminal cover cell selecting parameter, and be persistent district by calculating the sub-district of selecting to meet the resident standard in sub-district.The cell selection information of broadcasting in this step is to realize that by system information block (System Information Block is called for short SIB) the current area cell selection information issues in SIB3, and the adjacent area cell selection information issues in SIB11.Many covers cell selection information of broadcasting is that the method by extended field in system information block or newly-increased system information block message realizes that cell selection information comprises cell selecting parameter and cell reselection parameters.
Step 3, terminal reside in described persistent district, the line position of going forward side by side registration.
Step 4, terminal is under idle pulley, according to described preferential access network attribute information, have the described service network of many cover cell selection information from broadcasting, read a cover cell reselection parameters corresponding with described terminal, and compare by the network signal relevant parameter that records with terminal, carry out the sub-district gravity treatment according to the sub-district reselection criterion, the sub-district of selecting to meet resident standard is a persistent district.The sub-district reselection criterion of GSM, the sub-district gravity treatment mainly realizes by two parameters of C1, C2 among the 2G; The sub-district reselection criterion of WCDMA is generally the S criterion.
Step 5, terminal reside in described persistent district, the line position of going forward side by side registration.
In the foregoing description, preferential access network attribute information in the described step 2 can be stored in the subscriber card of described terminal or described terminal, terminal is according to described preferential access network attribute information, have the described service network of many cover cell selection information from broadcasting, read and described terminal corresponding district is selected parameter, and be persistent district by calculating the sub-district of selecting to meet the resident standard in sub-district.
Be stored in the preferential access network attribute information in the described terminal, can select change by the menu of described terminal.The user can select the preferential access network attribute of terminal by the menu of the described terminal of operation, has realized user's independence.
Be stored in the preferential access network attribute information in the subscriber card of described terminal, can change, thereby realize the flexible control and the management of operator by wireless (Over The Air is called for short OTA) downloading mode.Stored user's preferential access network attribute information in the subscriber card (as SIM, usim card), the attribute (being GSM or WCDMA or TD-SCDMA or LTE network etc.) that shows this user priority access network, and this partial information operator can change by the OTA mode, operator can treat with a certain discrimination according to specific user or certain customers, thereby has realized the flexible control and the management of operator.
The present invention provides preferred implementation for the step 2 in the foregoing description, and as shown in Figure 2, described step 2 comprises:
Step 21, terminal are according to described preferential access network attribute information, have the described service network of many cover cell selection information from broadcasting, read a cover current area cell selecting parameter corresponding among the SIB3 with described terminal, and judge by calculating whether described current area is the sub-district that meets the resident standard in sub-district, if, then described current area is a persistent district, execution in step 3; Otherwise, execution in step 22;
Step 22, terminal are according to described preferential access network attribute information, have the described service network of many cover cell selection information from broadcasting, read described current area adjacent area cell selecting parameter corresponding among the SIB11 with described terminal, and by calculating to judge whether there is the sub-district that meets the resident standard in sub-district in the described adjacent area, if, the then described sub-district that meets the resident standard in sub-district is a persistent district, execution in step 3; Otherwise, execution in step 23.
Whether step 23, described terminal search for the sub-district of current service network finishes, if then execution in step 24; Otherwise then execution in step 21;
Step 24, terminal change next frequency network over to, and the gravity treatment service network returns execution in step 21.
In the present invention, the terminal first attached is behind network, Web broadcast is overlapped cell selecting and reselecting parameters more, different users can belong to different user types, user's terminal is according to the preferential access network attribute information in the subscriber card that is stored in described terminal or described terminal, go to read that cover cell selecting parameter corresponding of broadcasting in the network with described terminal, cell selection information in cell selection information in the read system information piece and the adjacent area system information block, selection meets the sub-district of the resident standard in sub-district.
The present invention provides preferred implementation for step 4 in the foregoing description, and as shown in Figure 3, described step 4 comprises:
Step 41, described terminal are monitored current area and adjacent area under idle pulley, record the network signal relevant parameter;
Step 42, described terminal from described service network, read SIB3 and SIB11 according to described preferential access network attribute information, select and described terminal corresponding district reselecting parameters;
Step 43, terminal are carried out the sub-district gravity treatment by more described network signal relevant parameter and described cell reselection parameters according to the sub-district reselection criterion, and the sub-district that selection meets the resident standard in sub-district is a persistent district.
Be example explanation terminal network selection and cell selecting process with the WCDMA network below.
After the UE start, at first should select a PLMN.Elected suffered a PLMN after, just begin to select to belong to the sub-district of this PLMN.After finding a such sub-district, from system information (broadcasting), just can know the information of adjacent area (neighboring cell), like this, UE just can select a sub-district that signal is best in all these sub-districts, residently gets off.And then, UE will initiate location registration (attach or location update).After the success, UE just resides in this sub-district and has suffered.
When UE resides in the sub-district, and after registering successfully, along with moving of UE, the signal correction parameter of current area and adjacent cells is all in continuous variation.UE will select an only sub-district, Here it is cell reselection process.
Be example explanation terminal cell reselection process with the gravity treatment of WCDMA sub-district to the flow process of GSM sub-district below.
(1) UE monitors the signal quality of current area and sub-district, adjacent area at any time under idle pulley, and the network signal quality of survey is Sx.
(2) WCDMA issues in current area system information block SIB3 in the WCDMA system message to GSM cell reselection parameters current area part, and neighbor cell just adjacent area part issues in the system information block SIB11 of adjacent area.The preferential access network attribute information of UE basis reads SIB3 and the SIB11 in the WCDMA network, obtains and described UE corresponding district reselecting parameters, and form 1 has provided the parameter that is closely related with sub-district gravity treatment strategy.
Table 1 and the closely-related parameter of sub-district gravity treatment strategy
(3) if Sx〉Sintrasearch, UE does not carry out common frequency measurement; If Sx<Sintrasearch, UE carries out common frequency measurement.If current area does not send Sintrasearch to UE, UE carries out common frequency measurement.
(4) if Sx〉Sintersearch, UE does not carry out different-frequency measure; If Sx<Sintersearch, UE carries out different-frequency measure.If current area does not send Sintersearch to UE, UE carries out different-frequency measure.
(5) if Sx〉SsearchRATn, UE does not carry out isosystem measurement; If Sx<SsearchRATn, UE carries out isosystem measurement.If current area does not send SsearchRATn to UE, UE carries out isosystem measurement.
(6) Sintrasearch, Sintersearch and SsearchRATn measure thresholding accordingly, point out in " the Cell selection and re-selection info " of SIB3.Sx is the network signal quality that UE records.
(7) MS at first measures the signal correction parameter outcome record of current area in Qmeas_LEV.For existing FDD, the overlay area of TDD, GSM is arranged again, the network signal relevant parameter between the different radio access technologies can't directly compare, and need be mapped as unified standard.MS is mapped to Qmeas_LEV among the Qmap according to " mappinginfo " among the SIB3.The Qmap that current area is recorded according to said method is exactly Qmap, s.To adjacent cell Qmap, the method for measurement of n is the same.
(8) if at sub-district gravity treatment timing length (Treselection) in the time, the sub-district reselection criterion still is met, and UE just selects this sub-district, residently gets off, and reads its broadcast, and the sub-district gravity treatment finishes.
Because what the UE of different user types read can be the different districts reselecting parameters, thereby can realize operator according to the service operation strategy, allow dissimilar user's gravity treatments in specifying preferred network, thereby realize the purpose of sharing network load.The present invention realizes simply, compares with load sharing mode between other system, network quality and customer service is experienced not influence, and realize that operator is controlled fully flexibly.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.