CN109964510A

CN109964510A - A kind of method and IVS selecting PLMN

Info

Publication number: CN109964510A
Application number: CN201780069737.0A
Authority: CN
Inventors: 杨一帆; 伍星
Original assignee: Huawei Technologies Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2017-02-17
Filing date: 2017-05-25
Publication date: 2019-07-02
Anticipated expiration: 2037-05-25
Also published as: WO2018149046A1; CN109964510B

Abstract

This application discloses a kind of methods and IVS for selecting PLMN.The method can include: when IVS is initialized or triggers PLMN gravity treatment, IVS selection target PLMN from least one preset PLMN, wherein be deployed with PSAP at least one described preset PLMN；Measure the index of the target PLMN；In the case where the index of the target PLMN has reached preset threshold, the target PLMN is accessed, so that PSAP of the IVS into the target PLMN sends data.Above scheme can guarantee to be deployed with PSAP in the PLMN of IVS access, can guarantee that MSD using same coding mode, avoids the code conversion in MSD transmission process in transmission process, to guarantee the reliability of MSD transmission.

Description

A kind of method and IVS selecting PLMN

This application claims submitted Patent Office of the People's Republic of China on February 17th, 2017, application No. is the priority of the Chinese patent application of 201710086815.X, entitled the method and apparatus of MSD data cross operator network transmission reliability " a kind of promoted ", entire contents are hereby incorporated by reference in the application.

Technical field

This application involves the methods and onboard system (In-Vehicle System, IVS) of field of communication technology more particularly to a kind of selection public land mobile network (Public Land Mobile Network, PLMN).

Background technique

At present, in urgent call (Emergency Call, Ecall), fault inquiry (Breakdown Call, Bcall), information inquires (Information call,) etc. Icall in vehicles related service, vehicle-related information is transmitted using minimal data set (Minimum Set of Data, MSD), MSD is transmitted by voice channel.

By taking Ecall as an example, the vehicle of Ecall function is deployed with when traffic accident occurs, and Ecall business can be actively triggered by occupant or by interior sensor passive triggering Ecall business.After the triggering of Ecall business, IVS sends MSD to nearest public safety answering point (Public Safety Answering Point, PSAP), the MSD may include the information such as time, place, direction of traffic, vehicles identifications, the diagnostic message of vehicle and passenger inside the vehicle's number.PSAP background work personnel send the related quick exterior traffic scene of the accident of rescue team to be sued and laboured according to the information for including in the MSD received.

Due to the particularity of MSD, need to guarantee the reliability in MSD transmission process, so that PSAP receives accurate MSD and provides corresponding rescue service.

Summary of the invention

This application provides a kind of method and IVS for selecting PLMN, by preset PLMN selection target PLMN access, can guarantee to be deployed with PSAP in the PLMN of access, can be avoided code conversion of the MSD in transmission process, guarantee the reliability that MSD is transmitted.

In a first aspect, being applied to the side IVS this application provides a kind of method for selecting PLMN, which comprises

When IVS is initialized or triggers PLMN gravity treatment, IVS selection target PLMN from least one preset PLMN, wherein be deployed with PSAP at least one described preset PLMN；Measure the index of the target PLMN；In the case where the index of the target PLMN has reached preset threshold, the target PLMN is accessed, so that PSAP of the IVS into the target PLMN sends data.

Here, the information of the preset PLMN is stored in advance in the IVS, and the preset PLMN may include following several situations:

The first, only stores a preset PLMN in IVS, which belongs to the first operator.Intelligible, such case is more applicable for an only operator and possesses PSAP deployment permission, which only deploys the scene of PSAP in its subordinate PLMN.It should be noted that such case is more applicable for the usage scenario of Ecall.

Second, multiple preset PLMN are stored in IVS, the multiple preset PLMN belongs to the first operator.It can Understand, such case is more applicable for an only operator and possesses PSAP deployment permission, and the operator all deploys the scene of PSAP in multiple PLMN of its subordinate.It should be noted that such case is more applicable for the usage scenario of the commerce services telephone service such as Icall, Bcall.

The third, stores multiple preset PLMN in IVS, include belonging to the preset PLMN of the first operator and belonging to the preset PLMN of the second operator in the multiple preset PLMN.Intelligible, such case is more applicable for the scene that You Duojia operator possesses PSAP deployment permission.It should be noted that such case is more applicable for the usage scenario of the commerce services telephone service such as Icall, Bcall.

With reference to first aspect, in some embodiments, when being stored with multiple preset PLMN in IVS, the IVS can be according to strategy selection target PLMN from least one preset PLMN chosen below:

The first, the IVS from selected in multiple preset PLMN it is last shut down or off-grid before the preset PLMN that registers as target PLMN.

Second, the IVS selects the highest preset PLMN of priority level as target PLMN from multiple preset PLMN.

The third, the IVS selects the preset PLMN of the IVS ownership as target PLMN from multiple preset PLMN.

4th kind, the preset PLMN that the IVS selects user to specify from multiple preset PLMN is as target PLMN.

It should be noted that, it is not limited to above-mentioned four kinds of selection strategies, the IVS can arbitrarily select a preset PLMN as target PLMN in the multiple preset PLMN, also it can choose a most strong or optimal index preset PLMN of signal in the multiple preset PLMN as target PLMN, the application is with no restrictions.

With reference to first aspect, in some embodiments, including belonging to the preset PLMN of the first operator and belonging to the preset PLMN of the second operator at least one described preset PLMN, wherein, the priority level of the preset PLMN for belonging to the first operator is above the priority level for belonging to the preset PLMN of the second operator；The IVS from selection target PLMN at least one preset PLMN include: the IVS according to priority level the selection target PLMN from least one preset PLMN.

With reference to first aspect, in some embodiments, if not having the index of preset PLMN to reach preset threshold at least one described preset PLMN, the method can also select PLMN to access by following two mode:

The first, the IVS accesses optimal preset PLMN, wherein the optimal preset PLMN is the preset PLMN that index is optimal at least one described preset PLMN.

Second, the IVS accesses the optimal PLMN of index, wherein without deployment PSAP in the optimal PLMN of the index optimal PLMN of index at least one preset PLMN for described in and at least one non-preset PLMN, at least one described non-preset PLMN.

With reference to first aspect, in some embodiments, the data are MSD.

Second aspect, this application provides a kind of IVS, comprising: processor, memory, transceiver, in which:

The memory is for storing at least one preset PLMN, wherein is deployed with PSAP at least one described preset PLMN；

The processor is used for when IVS is initialized or triggers PLMN gravity treatment, the selection target PLMN from least one described preset PLMN；

The processor is also used to measure the index of the target PLMN；

The transceiver is used in the case where the index of the target PLMN has reached preset threshold, accesses the target PLMN, sends data with the PSAP into the target PLMN.

In conjunction with second aspect, in some embodiments, the preset PLMN stored in the memory may include a kind of following situation:

The first, only stores a preset PLMN in the memory, which belongs to the first operator.Intelligible, such case is more applicable for an only operator and possesses PSAP deployment permission, which only deploys the scene of PSAP in its subordinate PLMN.It should be noted that such case is more applicable for the usage scenario of Ecall.

Second, multiple preset PLMN are stored in the memory, the multiple preset PLMN belongs to the first operator.Intelligible, such case is more applicable for an only operator and possesses PSAP deployment permission, and the operator all deploys the scene of PSAP in multiple PLMN of its subordinate.It should be noted that such case is more applicable for the usage scenario of the commerce services telephone service such as Icall, Bcall.

The third, stores multiple preset PLMN in the memory, include belonging to the preset PLMN of the first operator and belonging to the preset PLMN of the second operator in the multiple preset PLMN.Intelligible, such case is more applicable for the scene that You Duojia operator possesses PSAP deployment permission.It should be noted that such case is more applicable for the usage scenario of the commerce services telephone service such as Icall, Bcall.

In conjunction with second aspect, in some embodiments, when being stored with multiple preset PLMN in the memory, the processor can be according to strategy selection target PLMN from least one preset PLMN chosen below:

The first, the processor from selected in multiple preset PLMN it is last shut down or off-grid before the preset PLMN that registers as target PLMN.

Second, the processor selects the highest preset PLMN of priority level as target PLMN from multiple preset PLMN.

The third, the processor selects the preset PLMN of the IVS ownership as target PLMN from multiple preset PLMN.

4th kind, the preset PLMN that the processor selects user to specify from multiple preset PLMN is as target PLMN.

It should be noted that, it is not limited to above-mentioned four kinds of selection strategies, the processor can arbitrarily select a preset PLMN as target PLMN in the multiple preset PLMN, also it can choose a most strong or optimal index preset PLMN of signal in the multiple preset PLMN as target PLMN, the application is with no restrictions.

In conjunction with second aspect, in some embodiments, including belonging to the preset PLMN of the first operator and belonging to the preset PLMN of the second operator at least one described preset PLMN, wherein, the priority level of the preset PLMN for belonging to the first operator is above the priority level for belonging to the preset PLMN of the second operator；The processor from selection target PLMN at least one preset PLMN include: the processor according to priority level the selection target PLMN from least one preset PLMN.

In conjunction with second aspect, in some embodiments, if there is no the index of preset PLMN to reach preset threshold at least one described preset PLMN, the processor may be used to indicate that the transceiver accesses optimal preset PLMN, wherein, the optimal preset PLMN is the preset PLMN that index is optimal at least one described preset PLMN；The transceiver is also used to access the optimal preset PLMN, alternatively,

The processor may be used to indicate that the transceiver access optimal PLMN of index, wherein the optimal PLMN of index For the optimal PLMN of index at least one described preset PLMN and at least one non-preset PLMN, without deployment PSAP at least one described non-preset PLMN；The transceiver is also used to access the optimal PLMN of the index.

In conjunction with second aspect, the data are MSD.

The third aspect, this application provides a kind of IVS, comprising: processing unit, storage unit, access unit, in which:

The storage unit is for storing at least one preset PLMN, wherein is deployed with PSAP at least one described preset PLMN；

The processing unit is used for when IVS is initialized or triggers PLMN gravity treatment, from least one described preset PLMN selection target PLMN；

The processing unit is also used to measure the index of the target PLMN；

The access unit is used in the case where the index of the target PLMN has reached preset threshold, accesses the target PLMN, sends data with the PSAP into the target PLMN.

Intelligible, the functional unit for including of the IVS can be used for executing the method for above-mentioned first aspect, specifically refer to foregoing description.

Fourth aspect, this application provides one kind, this application provides a kind of computer readable storage mediums, the computer-readable recording medium storage has instruction, when run on a computer, so that computer executes any one method in above-mentioned first aspect and each possible implementation of first aspect.

5th aspect, this application provides a kind of computer program products comprising instruction, when run on a computer, so that computer executes any one method in above-mentioned first aspect and each possible implementation of first aspect.

Implement the application, by selecting PLMN access in preset PLMN, guarantees to be deployed with PSAP in the PLMN of access, can guarantee that MSD uses same coding mode in transmission process, the code conversion in MSD transmission process is avoided, to guarantee the reliability of MSD transmission.Implement the application, can guarantee that MSD is transferred to PSAP like clockwork, so that PSAP can provide corresponding service for vehicle, can reduce vehicle and bring loss when accident or failure occurs.

Detailed description of the invention

In order to illustrate more clearly of the technical solution in the application or background technique, attached drawing needed in the application or background technique will be illustrated below.

Fig. 1 is the schematic diagram of transmission process of MSD in the prior art.

Fig. 2 is sound spectrograph of the MSD in the case where transmitting across common carrier in the prior art.

Fig. 3 is the schematic diagram that a kind of IVS access provided by the present application is deployed with progress PSAP paging after the PLMN of PSAP.

Fig. 4 is the schematic diagram of progress PSAP paging after a kind of PLMN of the IVS access provided by the present application without disposing PSAP.

Fig. 5 is the schematic diagram that PSAP is deployed in a PLMN under a kind of first operator provided by the present application.

Fig. 6 is the schematic diagram that PSAP is deployed in multiple PLMN under a kind of first operator provided by the present application.

Fig. 7 is the schematic diagram that PSAP is deployed in a kind of multiple PLMN under first operator and the second operator provided by the present application.

Fig. 8 is a kind of flow diagram of method for selecting PLMN provided by the present application.

Fig. 9 is the process schematic of IVS transmission MSD provided by the present application a kind of.

Figure 10 is the flow diagram of the method for another selection PLMN provided by the present application.

Figure 11 is the flow diagram of the method for another selection PLMN provided by the present application.

Figure 12 is a kind of structural block diagram of implementation of IVS provided by the present application.

Figure 13 is the functional block diagram of IVS provided by the present application a kind of.

Specific embodiment

The application is described below with reference to the attached drawing in the application.

Referring to Fig. 1, Fig. 1 show this application involves MSD in the prior art be transferred to from IVS the process schematic of PSAP.As shown in Figure 1, the transmission process of MSD may include following steps:

Step 1: IVS sends MSD.

Step 2: MSD is transferred to the access PLMN of IVS.The access PLMN of the IVS depends on the PLMN selection course of the IVS.It is intelligible, the base station for including in access PLMN, mobile switching centre are exemplarily only listed in Fig. 1, in actual conditions, the access PLMN may include more network elements, for example, home location register (Home Location Register, HLR), Authentication Center (AUthentication Center, AUC), equipment identity register (Equipment Identity Register, EIR) etc..

Step 3: MSD is transferred to Public Switched Telephone Network (Public Switched Telephone Network, PSTN) by access PLMN.

Step 4: MSD is transferred to the purpose PLMN for being deployed with PSAP by PSTN.It is deployed with PSAP in the purpose PLMN, optionally, the purpose PLMN can be the PLMN that one nearest from vehicle where the IVS is deployed with PSAP.The PLMN for being deployed with PSAP belongs to PSAP service provider.It is intelligible, illustratively list the fixed line switching centre for including in purpose PLMN, PSAP in Fig. 1, in actual conditions, the purpose PLMN may include more network elements.

Step 5: MSD is transferred to the PSAP in the purpose PLMN.

Since MSD is transmitted by voice channel, MSD requires coding and decoding when through the access PLMN and purpose PLMN to adapt to voice channel.

As can be known from Fig. 1, in the transmission process of above-mentioned MSD, the access PLMN and purpose PLMN of the IVS is not the same PLMN, it cannot be guaranteed that the access PLMN of the IVS is identical with common carrier belonging to purpose PLMN.Under normal circumstances, different common carriers carries out encoding and decoding work to MSD using different coding modes of eating dishes without rice or wine, such as, when MSD is transmitted in the PLMN by common carrier A subordinate, coding mode 1 may be used to carry out encoding and decoding work, when MSD is transmitted in the PLMN by common carrier B subordinate, coding mode 2 may be used to carry out encoding and decoding work.Therefore, when MSD is transmitted between the PLMN under different common carriers, due to the conversion of coding mode, MSD is easy to cause to lose or deform.In the case, the reliability of MSD transmission will receive strong influence, it is possible to be delayed rescue progress.

For concrete example, assuming that the access PLMN of IVS belongs to common carrier A, common carrier A uses wideband code division multiple access wideband adaptive multi code Rate of Chinese character (Wideband Code Division Multiple AccessAdaptive Multi-Rate Wideband, WCDMA AMR-WB) it is encoded, purpose PLMN (being deployed with PSAP) belongs to common carrier B, common carrier B uses global system for mobile communications narrowband self-adaption multi code Rate of Chinese character (Global System for Mobile CommunicationAdaptive Multi-Rate Narrowband, GS M AMR-NB) it is encoded.Referring to fig. 2, left side shows the sound spectrograph that IVS is sent to the uplink MSD of access PLMN in Fig. 2, and right part of flg shows PSAP reception The sound spectrograph of the downlink MSD arrived.As shown in Figure 2, MSD is distorted in the case where transmitting across common carrier in the prior art, not can guarantee data reliability.

Since the above-mentioned prior art not can guarantee the reliability of MSD transmission, this application provides a kind of method for selecting PLMN, IVS selection target PLMN from least one preset PLMN is accessed, and transmits MSD using the target PLMN.Wherein, PSAP is deployed at least one described preset PLMN.The method can guarantee the PLMN where IVS access PSAP, that is, IVS and PSAP uses the same PLMN.It is intelligible, encoding and decoding are carried out to data using a kind of coding mode of determination in the same PLMN, so that in the application, the problem of MSD is not in code conversion when carrying out encoding and decoding in transmission process, the distortion or distortion that not will cause MSD ensure that the reliability of MSD transmission.

The present processes in order to better understand are first described in detail PLMN.PLMN is by government or operator that it is ratified, for the network that the public provides land mobile business purpose and establishes and manages.For example, all including one or more PLMN under the operators such as movement, connection, telecommunications, being also all deployed with one or more PLMN under France, the operators such as Orange, SFR, Bouygues in China.Each PLMN has unique mark, and the mark of PLMN is collectively constituted by mobile device country code (Mobile country code, MCC) and mobile device network code (Mobile country code, MNC).For example, the mobile one of PLMN's of operator is identified as 46000, wherein 460 be MCC, and 00 is MNC in China.In France, one of PLMN's of operator Orange is identified as 20801, wherein.208 be MCC, and 01 is MNC.

It is to be understood that being not that can dispose PSAP in the PLMN under each operator although there is at least one PLMN that can provide land mobile business for the public under each operator.Wherein, the deployment permission of PSAP is usually by government to each operator, that is to say, that the operator for only possessing PSAP deployment permission could dispose PSAP in one or more PLMN of its subordinate, to provide PSAP service for the public.

In this application, PLMN is segmented into the PLMN for being deployed with PSAP and the PLMN two major classes without disposing PSAP.

The first kind is deployed with the PLMN of PSAP.In this classification, PSAP is deployed in PLMN, that is, PSAP is bound with PLMN.After IVS selection is deployed with the PLMN access of PSAP, when needing to carry out PSAP paging to establish connection with PSAP, the PSAP disposed in the PLMN of the IVS access will necessarily be called.It can be found in Fig. 3, Fig. 3 shows the schematic diagram that a kind of IVS access provided by the present application is deployed with the PLMN of PSAP.As shown, deploying PSAP 1 in PLMN 1, then when IVS accesses PLMN 1 and carries out PSAP paging, PSAP 1 will necessarily be paged.

Second class does not dispose the PLMN of PSAP.In this classification, PSAP is not provided in the PLMN.After IVS selection is without disposing the PLMN access of PSAP, when needing to carry out PSAP paging to establish connection with PSAP, needing the PLMN for not disposing PSAP by this to be connected to other deployments has the PLMN of PSAP can successful call PSAP.It can be found in Fig. 4 and carry out schematic diagram when PSAP paging after Fig. 4 shows a kind of IVS access provided by the present application without disposing the PLMN of PSAP.As shown, when IVS access is when being PLMN1 and paging PSAP, IVS needs to be connected to PLMN2 by PLMN 1, then passes through PLMN2 paging to PSAP2 without being deployed with PSAP2 in deployment PSAP, PLMN2 in PLMN1.

The present processes in order to better understand first elaborate to the preset PLMN in IVS.In this application, the preset PLMN belongs to above-mentioned second class PLMN, i.e., is all deployed with PSAP in the described preset PLMN.In IVS Preset PLMN it is related to the deployment permission of PSAP and specific deployment scenario, be described in detail below.

(1) a preset PLMN is only stored in IVS, which belongs to the first operator.

Intelligible, such case is more applicable for an only operator and possesses PSAP deployment permission, and the operator only deploys the scene of PSAP in its subordinate PLMN.Here, the operator that this can be possessed to PSAP deployment permission is known as the first operator.

Wherein, the PLMN that PSAP is uniquely deployed under the first operation can be about fixed region and provide PSAP service, and the region of agreement can be the region etc. in a national region or a city.It can be found in Fig. 5, Fig. 5 shows the schematic diagram that PSAP is deployed in a PLMN under a kind of first operator provided by the present application.As shown, one PLMN for being deployed with PSAP under first operator can provide PSAP service for the region of agreement.

Only has one in the first operator in the case where be deployed with the PLMN of PSAP, IVS stores the relevant information of the PLMN, and sets preset PLMN for the PLMN.For example, it is assumed that Chinese Government has given the PSAP deployment permission of regional to movement, movement only deploys PSAP in the 46000PLMN for belonging to it, then storing the relevant information of 46000PLMN in the IVS, and sets preset PLMN for 46000PLMN.In another example, it is assumed that Chinese Government has given the PSAP deployment permission of regional to connection, and connection deploys PSAP in the 46001PLMN for belonging to it, then the relevant information of IVS storage 46001PLMN, and preset PLMN is set by 46001PLMN.

It is intelligible, the usage scenario of Ecall is more applicable for the case where deployment PSAP in a PLMN described in above-mentioned (one).

(2) multiple preset PLMN are stored in IVS, the multiple preset PLMN belongs to the first operator.

Intelligible, such case is more applicable for an only operator and possesses PSAP deployment permission, and the operator all deploys the scene of PSAP in multiple PLMN of its subordinate.Here, the operator that this can be possessed to PSAP deployment permission is known as the first operator.

Wherein, multiple PLMN for being deployed with PSAP under the first operator may respectively be different areas and provide PSAP service.It can be found in Fig. 6, Fig. 6 shows the schematic diagram that PSAP is deployed in multiple PLMN under a kind of first operator provided by the present application.As shown in fig. 6, there is the n PLMN for being deployed with PSAP under first operator, wherein it is deployed with PSAP 1 in PLMN 1, PSAP 2 is deployed in PLMN 2, and so on, PSAP n is deployed in PLMN n.Optionally, PLMN 1 can provide PSAP service for area 1, and PLMN 2 can provide PSAP service for area 2, and PLMN n can provide PSAP service for area n.It should be noted that, when multiple PLMN for being deployed with PSAP under first operator are respectively that each department provide PSAP service, there can be the region of coincidence between each department, alternatively, multiple PLMN for being deployed with PSAP under the first operator can also provide PSAP service simultaneously for identical area.

In the case where having multiple PLMN for being deployed with PSAP in the first operator, IVS stores the relevant information of multiple PLMN for being deployed with PSAP therein, and sets preset PLMN for the multiple PLMN for being deployed with PSAP.Such as, assuming that Chinese Government has given the PSAP deployment permission of regional to movement, movement deploys PSAP in 46000PLMN, the 46002PLMN for belonging to it, 46000PLMN can be stored in the so described IVS perhaps the relevant information of at least one of 46002PLMN and sets preset PLMN at least one of 46000PLMN or 46002PLMN.

It can be found in table 1, table 1 shows the relevant information for the preset PLMN that IVS is stored in a specific embodiment.

Serial number

Preset PLMN

PLMN mark

The PSAP of deployment

Operator

1	Preset PLMN1	Mark 1	PSAP1	First operator
2	Preset PLMN2	Mark 2	PSAP2	First operator
…	…	…	…	…
n	Preset PLMNn	Identify n	PSAPn	First operator

Table 1

As shown in table 1, the relevant information of n preset PLMN is stored in the IVS, wherein it is deployed with PSAP1 in first preset PLMN, is deployed with PSAP2 in second preset PLMN, and so on, PSAPn is deployed in n-th of preset PLMN.

Intelligible, the relevant information of the preset PLMN stored in the IVS is not limited to enumerate the items come in above table, and in practical application, information more abundant can be also stored in the IVS.For example, the IVS can also store the area coverage etc. of each preset PLMN.

It is intelligible, in specific implementation, preset PLMN in the IVS can be stored by mode shown in above-mentioned table 1, it can not also be by the way of list storage, in SIM card or usim card that directly the relevant information of at least one preset PLMN is stored in IVS or other storage equipment.

It is intelligible, PSAP is disposed described in above-mentioned (two) in multiple PLMN, and the case where multiple PLMN belongs to the same operator, be more applicable for the usage scenario of the commerce services telephone service such as Icall, Bcall.

(3) multiple preset PLMN are stored in IVS, include belonging to the preset PLMN of the first operator and belonging to the preset PLMN of the second operator in the multiple preset PLMN.

Intelligible, such case is more applicable for the scene that You Duojia operator possesses PSAP deployment permission.Here, by taking Liang Jia operator possesses PSAP deployment permission as an example, the operator that wherein one possesses PSAP deployment permission can be known as to the first operator, the operator that another family possesses PSAP deployment permission is known as the second operator.Wherein, the first operator can dispose PSAP at least one PLMN of its subordinate, and the second operator can also dispose PSAP at least one PLMN of its subordinate.

Wherein, the first operator and the second operator may respectively be different areas and provide PSAP service.It can be found in Fig. 7, Fig. 7 shows the schematic diagram that PSAP is deployed in multiple PLMN under a kind of first operator and the second operator provided by the present application.

As shown in fig. 7, first operator is that area 1 provides PSAP service, there are the m PLMN for being deployed with PSAP under first operator.Wherein, it is deployed with PSAP 1 in PLMN 1, PSAP 2 is deployed in PLMN 2, and so on, PSAP m is deployed in PLMN m.Optionally, PLMN 1 can provide PSAP service for son area 1, and PLMN2 can provide PSAP service for son area 2, and PLMN m can provide PSAP service for son area m.

As shown in fig. 7, second operator is that area 2 provides PSAP service, there are the n-m PLMN for being deployed with PSAP under second operator.Wherein, it is deployed with PSAP m+1 in PLMN m+1, PSAP n is deployed in PLMN n.Optionally, wherein PLMN m+1 can provide PSAP service for son area m+1, and PLMN n can provide PSAP service for son area n.

It should be noted that, when multiple PLMN for being deployed with PSAP under first operator and the second operator are respectively that each department provide PSAP service, there can be the region of coincidence between each department, alternatively, multiple PLMN for being deployed with PSAP under the first operator and the second operator can also provide PSAP service simultaneously for identical area.

In the case where having at least one to be deployed with the PLMN of PSAP in the first operator and the second operator, IVS stores the relevant information of multiple PLMN for being deployed with PSAP therein, and sets preset PLMN for the multiple PLMN for being deployed with PSAP.Such as, assuming that Chinese Government has given PSAP deployment permission to mobile and connection, movement deploys PSAP in 46000PLMN, the 46002PLMN for belonging to it, connection deploys PSAP in the 46001PLMN for belonging to it, the so described IVS can store the relevant information of any several PLMN of 46000PLMN, 46002PLMN perhaps in 46001PLMN and set preset PLMN for any several PLMN in 46000PLMN, 46002PLMN or 46001PLMN.

It can be found in table 2, table 2 shows the relevant information for the preset PLMN that IVS is stored in a specific embodiment.

Serial number	Preset PLMN	PLMN mark	The PSAP of deployment	Operator
1	Preset PLMN1	Mark 1	PSAP1	First operator
…	…	…	…	…
m	Preset PLMN m	Identify m	PSAP m	First operator
m+1	Preset PLMN m+1	Identify m+1	PSAP m+1	Second operator
…	…	…	…	…
n	Preset PLMN n	Identify n	PSAP n	Second operator

Table 2

As shown in table 1, the relevant information of n preset PLMN is stored in the IVS.Wherein, there are m preset PLMN to belong to the first operation, there are n-m preset PLMN to belong to the second operator.It is deployed with PSAP1 in first preset PLMN, is deployed with PSAP 2 in second preset PLMN, and so on, it is deployed with PSAP m in m-th of preset PLMN, is deployed with PSAP n in n-th of preset PLMN.

It is intelligible, in specific implementation, preset PLMN in the IVS can be stored by mode shown in above-mentioned table 2, it can not also be by the way of list storage, in SIM card or usim card that directly the relevant information of at least one preset PLMN is stored in IVS or other storage equipment.

It is intelligible, PSAP is disposed described in above-mentioned (three) in multiple PLMN, and the case where multiple PLMN can be belonging respectively to different operators, be more applicable for the usage scenario of the commerce services telephone service such as Icall, Bcall.

It is above-mentioned to be described in detail in this application, the various situations of the preset PLMN in IVS, below with reference to above-mentioned various briefing the present processes.

Firstly, in this application, can trigger the method for the selection PLMN that IVS is executed in the application in the following two cases.

The first when the IVS is initialized needs that PLMN is selected to access, the method for executing the selection PLMN in the application.The IVS selects a cell to be resident and initiates register flow path after selected access PLMN in the cell for belonging to access PLMN.In this case, after the IVS access PLMN, when the IVS, which initiates Ecall, Bcall, Icall etc., needs to transmit the vehicle related service of MSD, MSD directly can be transmitted by the access PLMN of selection.

Second, when the IVS executes the operation of PLMN gravity treatment, execute the method for selecting PLMN in the application.

In some embodiments, after the IVS accesses some PLMN, be periodically confirmed whether to have one preferably PLMN is periodically executed the operation of PLMN gravity treatment, that is, periodically carries out the method for the selection PLMN in the application.

In further embodiments, the IVS is currently accessed PLMN is simultaneously not suitable for, and at this moment the IVS can execute the operation of PLMN gravity treatment, i.e., the method that the described IVS can execute the selection PLMN in the application is accessed with one better PLMN of selection.For example, the PLMN being currently accessed as the IVS be not the Home PLMN of the IVS or PLMN that the IVS is currently accessed difference in signal strength when, method that the IVS can execute the selection PLMN in the application.

In further embodiments, for the IVS when initiation Ecall, Bcall, Icall etc. need to transmit the vehicle related service of MSD, the IVS executes the operation of PLMN gravity treatment, that is, executes the method for the selection PLMN.In this case, the IVS has accessed some PLMN in initialization, but the PLMN accessed when initialization is not necessarily deployed with PSAP.Method by executing the selection PLMN in the application, the IVS, which is reselected, to be belonged to PSAP service provider, is deployed with the PLMN access of PSAP, and transmits MSD by the PLMN of selection.

Fig. 8 is referred to, Fig. 8 is a kind of flow diagram of method for selecting PLMN provided by the present application.In embodiment of the method shown in Fig. 8, the preset PLMN in IVS is that above-mentioned (one) plants situation, i.e. the first operator possesses PSAP deployment permission, and the first operator only deploys PSAP in its subordinate PLMN.The PLMN is set preset PLMN by the IVS.The method can comprise the following steps that

S101, IVS select preset PLMN as target PLMN, wherein are deployed with PSAP in the preset PLMN.

Here, the preset PLMN in the IVS only has one, i.e., unique one is deployed with the PLMN of PSAP under described first operator.That is, the IVS selects under first operator unique one to be deployed with the PLMN of PSAP as the target PLMN.

The index of S102, the measurement target PLMN.

Specifically, including multiple cells (Cell) under a PLMN, the index of PLMN is measured as the corresponding index of index optimum subdistrict in multiple cells under the PLMN.For example, the index of a PLMN can be the optimal corresponding index of a cell of index under the PLMN.In this application, the index of the target PLMN can have one or more, it may include signal strength, signal-to-noise ratio, received signal strength indicator (Received Signal Strength Indication, RSSI), received signal code power (Received Signal Code Powe, RSCP), chip energy from other area interferences (Energy Chip/Interfere Other Cell, Ec/Io) etc..

S103, in the case where the index of the target PLMN has reached preset threshold, the target PLMN is accessed, so that PSAP of the IVS into the target PLMN sends data.

In this application, the IVS is previously stored with the corresponding preset threshold of indices.The index of the target PLMN has reached corresponding preset threshold, illustrates that the index of the target PLMN is good, can be normal or efficiently transmits data.

The target PLMN is accessed, can guarantee to be deployed with PSAP in the access PLMN of the IVS, the IVS can send data to the PSAP in the target PLMN.

In this application, after the IVS accesses the target PLMN, when initiating the CAR SERVICEs such as Ecall, Bcall, Icall, MSD can be sent to the PSAP in the target PLMN, so that PSAP provides corresponding service for vehicle.

It can be found in Fig. 9, after Fig. 9 shows the method for implementing selection PLMN described herein, the process of the IVS transmission MSD.Here, it can compare with Fig. 1, the access PLMN and purpose PLMN of IVS is the PLMN under different operators in Fig. 1, and access PLMN and purpose PLMN uses different coding modes, and MSD passes through code conversion in transmission, Reliability is affected.As shown in figure 9, access PLMN and purpose PLMN is the same PLMN after implementing method described herein, MSD uses same coding mode in transmission, avoids code conversion of the MSD in transmission process, can ensure the reliability of MSD in transmission process.Implement the application, can guarantee that MSD is transferred to PSAP like clockwork, so that PSAP can provide corresponding service for vehicle, can reduce vehicle and bring loss when accident or failure occurs.

0, Figure 10 is the flow diagram of the method for another selection PLMN provided by the present application referring to Figure 1.Figure 10 embodiment and Fig. 8 embodiment the difference is that, preset PLMN is that above-mentioned (two) kind or (three) plant situation in the embodiment of the method shown in Figure 10, the i.e. described preset PLMN has multiple, the multiple preset PLMN can belong to the same operator, also may belong to different operators.The method can comprise the following steps that

S201, IVS selection target PLMN from multiple preset PLMN, wherein be deployed with PSAP in the multiple preset PLMN.

In this application, the IVS can be as follows according to the different tactful selection target PLMN from multiple preset PLMN:

Here, the IVS can temporarily save last shutdown perhaps before off-grid registration (accessing) if the PLMN that is registered before upper primary shutdown or off-grid of the PLMN IVS be just preset PLMN, select the preset PLMN as the target PLMN.In this case, the PLMN accessed before selection IVS, it can be ensured that agree between the PLMN and the IVS, and the PLMN is preset PLMN, and can guarantee to be deployed with PSAP in the PLMN.

Here, the IVS can set priority when preset PLMN is stored in advance for each preset PLMN.When executing the method in the application, the IVS selects in the multiple preset PLMN the highest preset PLMN of priority level as the target PLMN.

The third, IVS selects the preset PLMN of the IVS ownership as target PLMN from multiple preset PLMN.

Here, the PLMN of IVS ownership only one, be storable in the IVS, for example, the PLMN of IVS ownership can be the 46000PLMN of the China Mobile perhaps 46001PLMN of the China Unicom or 46003PLMN of China Telecom.Here Home PLMN is similar with the ownership place of mobile phone, the information of ownership place is stored in the SIM card or usim card in mobile phone, and the ownership place is uniquely, for example, ownership place can be Shenzhen, Beijing, Shanghai etc..

In this application, if the Home PLMN of the IVS is just preset PLMN, select the PLMN as the target PLMN.In this case, select the Home PLMN of IVS as target PLMN, the IVS will not be roamed when accessing network, easy to operate.And the PLMN is preset PLMN, and can guarantee to be deployed with PSAP in the PLMN.

Here, user also may specify some PLMN, and the PLMN that the IVS directly selects the user to specify from the multiple preset PLMN is as the target PLMN.

It is intelligible, be not limited to four kinds of selection strategies of foregoing description, the IVS can also according to other selection strategies from the multiple preset PLMN selection target PLMN.For example, the IVS can be any in the multiple preset PLMN It selects a preset PLMN as target PLMN, also can choose a most strong or optimal index preset PLMN of signal in the multiple preset PLMN as target PLMN, the application is with no restrictions.

The index of S202, the measurement target PLMN.

S203, in the case where the index of the target PLMN has reached preset threshold, the target PLMN is accessed, so that PSAP of the IVS into the target PLMN sends data.

It should be noted that the step S202-S203 can refer to the associated description of step S102-S103 in Fig. 8 embodiment, this will not be repeated here.

In this application, in the case where the index of the target PLMN does not reach preset threshold, the IVS continuation selects other preset PLMN as new target PLMN in the multiple preset PLMN, and equally execute step S202-S203, until select meet this application claims target PLMN access.

It is worth noting that, when the IVS continuation selects other preset PLMN as new target PLMN in the multiple preset PLMN, second above-mentioned of selection strategy can be used, a preset PLMN can also arbitrarily be selected, also it can choose a most strong or optimal index preset PLMN of signal as new target PLMN, the application is with no restrictions.

Here, after the method that the selection PLMN for implementing the application can be shown with reference also to Fig. 9, Fig. 9, the process of the IVS transmission MSD.As shown in figure 9, access PLMN and purpose PLMN is the same PLMN after implementing method described herein, MSD uses same coding mode in transmission, avoids code conversion of the MSD in transmission process, can ensure the reliability of MSD in transmission process.Implement the application, can guarantee that MSD is transferred to PSAP like clockwork, so that PSAP can provide corresponding service for vehicle, can reduce vehicle and bring loss when accident or failure occurs.

1, Figure 11 is the flow diagram of the method for another selection PLMN provided by the present application referring to Figure 1.In embodiment of the method shown in Fig. 9, the preset PLMN in IVS is that above-mentioned (three) plant situation, and Ji Duojia operator possesses the scene of PSAP deployment permission.By taking Liang Jia operator possesses PSAP deployment permission as an example, the method can comprise the following steps that embodiment of the method shown in Figure 11

S301, IVS selection target PLMN from multiple preset PLMN according to priority level.

In this application, including belonging to the preset PLMN of the first operator and belonging to the preset PLMN of the second operator in the multiple preset PLMN, wherein, the priority level for belonging to each preset PLMN of the first operator is above each the preset PLMN for belonging to the second operator.

Specifically, the first selection target PLMN in the high preset PLMN for belonging to the first operator of priority of the IVS.In selection target PLMN, the selection strategy selection target PLMN in above-mentioned Figure 10 embodiment can be used, specifically refer to the associated description in Figure 10 embodiment, this will not be repeated here.

The index of S302, the measurement target PLMN.

S303, in the case where the index of the target PLMN has reached preset threshold, the target PLMN is accessed, so that PSAP of the IVS into the target PLMN sends data.

It should be noted that the step S302-S303 can refer to the associated description of step S102-S103 in Fig. 8 embodiment, this will not be repeated here.

In this application, in the case where the index of the target PLMN does not reach preset threshold, the IVS continuation selects other preset PLMN as new target PLMN in the preset PLMN for belonging to the first operator, and equally execute step S302-S303, until select meet this application claims target PLMN access.If belonging to first described Do not meet in the preset PLMN of operator this application claims target PLMN, then select preset PLMN as new target PLMN in the preset PLMN for belonging to the second operator, and equally execute step S302-S303, until select meet this application claims target PLMN access.

Here, after the method for implementing selection PLMN described herein can be shown with reference also to Fig. 9, Fig. 9, the process of the IVS transmission MSD.As shown in figure 9, access PLMN and purpose PLMN is the same PLMN after implementing method described herein, MSD uses same coding mode in transmission, avoids code conversion of the MSD in transmission process, can ensure the reliability of MSD in transmission process.Implement the application, can guarantee that MSD is transferred to PSAP like clockwork, so that PSAP can provide corresponding service for vehicle, can reduce vehicle and bring loss when accident or failure occurs.

In some embodiments, for the method for the selection PLMN in embodiment of the method shown in above-mentioned Fig. 8, Figure 10 or Figure 11, if there is no the index of preset PLMN to reach preset threshold at least one preset PLMN of IVS storage, the method can comprise the further steps of: the IVS and access optimal preset PLMN, wherein, the optimal preset PLMN is the preset PLMN that index is optimal at least one described preset PLMN.

Specifically, in this case, the index of all preset PLMN does not all reach preset threshold, it may be possible to which preset threshold is arranged excessively high, it is also possible to be preset PLMN index it is general.At this moment, IVS may be selected the optimal preset PLMN access of index at least one described preset PLMN and be deployed with PSAP in the preset PLMN of access although the preset PLMN index of access does not reach preset threshold.

After implementing above-mentioned steps, access PLMN and purpose PLMN is the same PLMN, and MSD uses same coding mode in transmission, avoids code conversion of the MSD in transmission process, can ensure the reliability of MSD in transmission process.

In further embodiments, for the method for the selection PLMN in embodiment of the method shown in above-mentioned Fig. 8, Figure 10 or Figure 11, if there is no the index of preset PLMN to reach preset threshold in the preset PLMN of at least one stored in IVS, the method can comprise the further steps of: the IVS access optimal PLMN of index, wherein, the optimal PLMN of index is the PLMN that index is optimal in described at least one preset PLMN and at least one non-preset PLMN, no deployment PSAP at least one described non-preset PLMN.

Specifically, in this case, the IVS measures the index of at least one non-preset PLMN, and from all optional PLMN, i.e., the PLMN access that selective goal is optimal from least one described preset PLMN and at least one described non-preset PLMN.Wherein, if the PLMN of IVS access is preset PLMN, then being deployed with PSAP in access PLMN, it can guarantee the reliability of MSD transmission.If the PLMN of the IVS access is non-preset PLMN, then without deployment PSAP in access PLMN, but accessing PLMN is that index is optimal, can guarantee efficiency when MSD transmission, in addition, can also guarantee the reliability of MSD by being transmitted several times.

Above-mentioned to illustrate the present processes, for the ease of better implementing the above scheme of the application, present invention also provides corresponding devices.

Be described below this application involves IVS a kind of implementation.The information of preset PLMN is stored in the IVS, the preset PLMN stored in the IVS can refer to the associated description that (one) above-mentioned (two) (three) plant situation.

2, Figure 12 is a kind of structural block diagram of implementation of IVS100 provided by the present application referring to Figure 1.As shown in figure 12, IVS100 can include: baseband chip 110, memory 115 (one or more computer readable storage mediums), radio frequency (RF) module 116, peripheral system 117.These components can communicate on one or more communication bus 114.

Peripheral system 117 is mainly used for realizing the interactive function between IVS100 and user/external environment, and main includes the input/output unit of IVS100.In the specific implementation, peripheral system 117 can include: touch screen controller 118, camera controller 119, Audio Controller 120 and sensor management module 121.Wherein, each controller can be coupled with corresponding peripheral equipment (such as touch screen 123, camera 124, voicefrequency circuit 125 and sensor 126).It should be noted that peripheral system 117 can also include other I/O peripheral hardwares.

It includes: one or more processors 111, clock module 112 and power management module 113 that baseband chip 110, which can integrate,.The clock module 112 being integrated in baseband chip 110 is mainly used for generating clock required for data transmission and timing control for processor 111.The power management module 113 being integrated in baseband chip 110 is mainly used for providing stable, pinpoint accuracy voltage for processor 111, radio-frequency module 116 and peripheral system.

Radio frequency (RF) module 116 is mainly integrated with the receiver and transmitter of IVS100 for sending and receiving radiofrequency signal.Radio frequency (RF) module 116 passes through radiofrequency signal and communication network and other communication apparatus communications.In the specific implementation, radio frequency (RF) module 116 may include but be not limited to: antenna system, RF transceiver, one or more amplifiers, tuner, one or more oscillators, digital signal processor, CODEC chip, SIM card and storage medium etc..In some embodiments, radio frequency (RF) module 116 can be realized on a separate chip.In this application, radio-frequency module can be used for and access PLMN communication to transmit MSD.

Memory 115 is coupled with processor 111, for storing various software programs and/or multiple groups instruction.In the specific implementation, memory 115 may include the memory of high random access, and it may also comprise nonvolatile memory, such as one or more disk storage equipments, flash memory device or other non-volatile solid-state memory devices.Memory 115 can store an operating system (following abbreviation systems), such as the embedded OSs such as ANDROID, IOS, WINDOWS or LINUX.Memory 115 can also store network communication program, which can be used for and one or more optional equipments, one or more terminal devices, one or more network equipments are communicated.Memory 115 can also store user interface program, the user interface program can be shown by patterned operation interface by the content image of application program is true to nature, and received user by input controls such as menu, dialog box and keys and operated to the control of application program.

In this application, memory 115 can also store the relevant information of preset PLMN.Wherein, the preset PLMN that memory 115 stores can refer to the associated description that (one) above-mentioned (two) (three) plant preset PLMN in situation.

It should be appreciated that IVS100 is only an example provided by the present application, also, IVS100 can have components more more or fewer than the component shown, can combine two or more components, or can have the different configurations of component to realize.

Figure 13 shows the functional block diagram of IVS provided by the present application a kind of.The functional block of IVS can implement application scheme by the combination of hardware, software or hardware and software.Those skilled in the art will appreciate that functional block described in Figure 13 can be combined or be separated into several sub-blocks to implement application scheme.Therefore, descriptions above can be supported to any possible combination or separation of following function module or further definition in the application.

As shown in figure 13, IVS110 can include: processing unit 111, storage unit 112, access unit 113.Wherein:

Storage unit 112 is for storing at least one preset PLMN；Wherein, PSAP is deployed at least one described preset PLMN；Wherein, at least one the preset PLMN stored in the storage unit 112 specifically refers to above-mentioned (one) (two) (3) associated description in situation is planted；

Processing unit 111 is used for the selection target PLMN from least one preset PLMN；

Processing unit 111 is also used to measure the index of the target PLMN；

Processing unit 111 is also used in the case where the index of the target PLMN has reached preset threshold, and instruction access unit accesses the target PLMN；

Access unit 113 is for accessing the target PLMN.

In the specific implementation, access unit 113 can be the radio-frequency module in Figure 10, it can be used for and access PLMN communication to transmit MSD.

In some possible embodiments, processing unit 111 is particularly used in selects the preset PLMN registered before last shutdown or off-grid as target PLMN from least one preset PLMN；Alternatively, selecting the highest preset PLMN of priority level as target PLMN from least one preset PLMN；Alternatively, selecting the preset PLMN of the IVS ownership as target PLMN from least one preset PLMN；Alternatively, the preset PLMN for selecting user to specify from least one preset PLMN is as target PLMN.

In some possible embodiments, including belonging to the preset PLMN of the first operator and belonging to the preset PLMN of the second operator at least one described preset PLMN, wherein, the priority level of the preset PLMN for belonging to the first operator is above the priority level for belonging to the preset PLMN of the second operator；Processing unit 111 is particularly used according to priority level the selection target PLMN from least one preset PLMN.

In some possible embodiments, if there is no the index of preset PLMN to reach preset threshold at least one described preset PLMN, processing unit 111 may be used to indicate that access unit 113 accesses optimal preset PLMN, wherein, the optimal preset PLMN is the preset PLMN that index is optimal at least one described preset PLMN；Or, processing unit 111 may be used to indicate that access unit 113 accesses the optimal PLMN of index, wherein, the optimal PLMN of the index is the PLMN that index is optimal in described at least one preset PLMN and at least one non-preset PLMN, no deployment PSAP at least one described non-preset PLMN.Access unit 113 is particularly used in the access optimal preset PLMN, alternatively, accessing the optimal PLMN of the index.

In an alternative embodiment, the data are MSD.

It should be understood that the specific implementation for the functional block that the IVS110 about Figure 13 includes, can refer to previous embodiment, does not repeat here.

Implement the application, can guarantee that accessing PLMN and purpose PLMN is the same PLMN, MSD uses same coding mode in transmission, avoids code conversion of the MSD in transmission process, ensures the reliability of MSD in transmission process.Implement the application, can guarantee that MSD is transferred to PSAP like clockwork, so that PSAP can provide corresponding service for vehicle, can reduce vehicle and bring loss when accident or failure occurs.

In the above-described embodiments, it can be realized wholly or partly by software, hardware, firmware or any combination thereof.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program product includes one or more computer instructions.When loading on computers and executing the computer program instructions, entirely or partly generate according to process described herein or function.The computer can be general purpose computer, special purpose computer, computer network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or it is transmitted from a computer readable storage medium to another computer readable storage medium, for example, the computer instruction can pass through wired (such as coaxial cable, optical fiber, number from a web-site, computer, server or data center User's line) or wirelessly (such as infrared, wireless, microwave etc.) mode is transmitted to another web-site, computer, server or data center.The computer readable storage medium can be any usable medium that computer can access or include the data storage devices such as one or more usable mediums integrated server, data center.The usable medium can be magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid State Disk) etc..

Claims

A method of selection PLMN characterized by comprising

When IVS is initialized or triggers PLMN gravity treatment, IVS selection target PLMN from least one preset PLMN, wherein be deployed with PSAP at least one described preset PLMN；

Measure the index of the target PLMN；

In the case where the index of the target PLMN has reached preset threshold, the target PLMN is accessed, so that PSAP of the IVS into the target PLMN sends data.
The method according to claim 1, wherein IVS selection target PLMN from least one preset PLMN includes:

IVS from selected at least one preset PLMN it is last shut down or off-grid before the preset PLMN that registers as target PLMN；Alternatively,

IVS selects the highest preset PLMN of priority level as target PLMN from least one preset PLMN；Alternatively,

IVS selects the preset PLMN of the IVS ownership as target PLMN from least one preset PLMN；Alternatively,

The preset PLMN that IVS selects user to specify from least one preset PLMN is as target PLMN.
According to the method for claim 1, it is characterized in that, including belonging to the preset PLMN of the first operator and belonging to the preset PLMN of the second operator at least one described preset PLMN, wherein, the priority level of the preset PLMN for belonging to the first operator is above the priority level for belonging to the preset PLMN of the second operator；

The IVS from selection target PLMN at least one preset PLMN include: the IVS according to priority level the selection target PLMN from least one preset PLMN.
Method according to claim 1-3, which is characterized in that the method also includes:

If not having the index of preset PLMN to reach preset threshold at least one described preset PLMN, the IVS accesses optimal preset PLMN, wherein the optimal preset PLMN is the preset PLMN that index is optimal at least one described preset PLMN；Alternatively,

If there is no the index of preset PLMN to reach preset threshold at least one described preset PLMN, then the IVS accesses the optimal PLMN of index, wherein, without deployment PSAP in the optimal PLMN of the index optimal PLMN of index at least one preset PLMN for described in and at least one non-preset PLMN, at least one described non-preset PLMN.
Method according to claim 1-4, which is characterized in that the data are MSD.
A kind of IVS characterized by comprising processor, memory, transceiver, in which:

The memory is for storing at least one preset PLMN, wherein is deployed with PSAP at least one described preset PLMN；

The processor is used for when IVS is initialized or triggers PLMN gravity treatment, the selection target PLMN from least one described preset PLMN；

The processor is also used to measure the index of the target PLMN；

The transceiver is used in the case where the index of the target PLMN has reached preset threshold, accesses the target PLMN, sends data with the PSAP into the target PLMN.
IVS as claimed in claim 6, which is characterized in that the processor be specifically used for from select at least one preset PLMN the preset PLMN registered before last shutdown or off-grid as target PLMN；Alternatively,

Select the highest preset PLMN of priority level as target PLMN from least one preset PLMN；Alternatively,

Select the preset PLMN of the IVS ownership as target PLMN from least one preset PLMN；Alternatively,

The preset PLMN for selecting user to specify from least one preset PLMN is as target PLMN.
IVS as claimed in claim 6, it is characterized in that, including belonging to the preset PLMN of the first operator and belonging to the preset PLMN of the second operator at least one described preset PLMN, wherein, the priority level of the preset PLMN for belonging to the first operator is above the priority level for belonging to the preset PLMN of the second operator；

The processor be specifically used for according to priority level from least one preset PLMN selection target PLMN.
Such as the described in any item IVS of claim 6-8, it is characterized in that, if the processor is also used to not have the index of preset PLMN to reach preset threshold at least one described preset PLMN, then indicate that the transceiver accesses optimal preset PLMN, wherein, the optimal preset PLMN is the preset PLMN that index is optimal at least one described preset PLMN；The transceiver is also used to access the optimal preset PLMN, alternatively,

If the processor is also used to not have the index of preset PLMN to reach preset threshold at least one described preset PLMN, then indicate the transceiver access optimal PLMN of index, wherein, without deployment PSAP in the optimal PLMN of the index optimal PLMN of index at least one preset PLMN for described in and at least one non-preset PLMN, at least one described non-preset PLMN；The transceiver is also used to access the optimal PLMN of the index.
IVS as claim in any one of claims 6-9, which is characterized in that the data are MSD.
A kind of IVS characterized by comprising processing unit, storage unit, access unit, in which:

The storage unit is for storing at least one preset PLMN, wherein is deployed with PSAP at least one described preset PLMN；

The processing unit is used for when IVS is initialized or triggers PLMN gravity treatment, from least one described preset PLMN selection target PLMN；

The processing unit is also used to measure the index of the target PLMN；

The access unit is used in the case where the index of the target PLMN has reached preset threshold, accesses the target PLMN, sends data with the PSAP into the target PLMN.
IVS as claimed in claim 11, which is characterized in that the processing unit is specifically used for selecting the preset PLMN registered before last shutdown or off-grid as target PLMN from least one preset PLMN；Alternatively,

Select the highest preset PLMN of priority level as target PLMN from least one preset PLMN；Alternatively,

The preset PLMN for selecting the IVS to belong to from least one preset PLMN is as target PLMN；Alternatively,

The preset PLMN for selecting user to specify from least one preset PLMN is as target PLMN.
IVS as claimed in claim 11, it is characterized in that, including belonging to the preset PLMN of the first operator and belonging to the preset PLMN of the second operator at least one described preset PLMN, wherein, the priority level of the preset PLMN for belonging to the first operator is above the priority level for belonging to the preset PLMN of the second operator；

The processing unit be specifically used for according to priority level from least one preset PLMN selection target PLMN.
Such as the described in any item IVS of claim 11-13, it is characterized in that, if the processing unit is also used to not have the index of preset PLMN to reach preset threshold at least one described preset PLMN, then indicate that the access unit accesses optimal preset PLMN, wherein, the optimal preset PLMN is the preset PLMN that index is optimal at least one described preset PLMN；The access unit is also used to access the optimal preset PLMN, alternatively,

If the processing unit be also used to not have at least one described preset PLMN the index of preset PLMN reach preset it is preset, then indicate the access unit access optimal PLMN of index, wherein, the optimal PLMN of index is the PLMN that index is optimal in described at least one preset PLMN and at least one non-preset PLMN, no deployment PSAP at least one described non-preset PLMN；The access unit is also used to access the optimal PLMN of the index.
Such as the described in any item IVS of claim 11-14, which is characterized in that the data are MSD.
A kind of computer readable storage medium, including instruction, when run on a computer, so that computer executes method as claimed in claims 1-5.
A kind of computer program product comprising instruction, when run on a computer, so that computer executes method as claimed in claims 1-5.