CN102137459B

CN102137459B - Method as well as related system and device for ensuring CS (circuit-switched) domain of one-card double-standby terminal to reside in two networks simultaneously

Info

Publication number: CN102137459B
Application number: CN2011100422103A
Authority: CN
Inventors: 郑小春; 曾雪红; 徐龙; 孙炼
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2011-02-21
Filing date: 2011-02-21
Publication date: 2013-12-04
Anticipated expiration: 2031-02-21
Also published as: CN102137459A; WO2012113214A1

Abstract

The embodiment of the invention provides a method as well as related system and device for ensuring a CS (circuit-switched) domain of a one-card double-standby terminal to reside in two networks simultaneously, and the method is applicable to a network side and comprises the following steps: receiving a 2G (2nd generation) network position updating request and a 3G (3rd generation) network position updating request which are sent by a one-card terminal, wherein the requests carry same user identifications; completing CS domain position updating together with the terminal so as to lead the CS domain of the terminal to reside in a 2G network and a 3G network, and storing the position information of the terminal residing in the networks; and when receiving a CS domain service request sent by a calling user, preferably selecting the 2G network to perform CS domain service based on the stored 2G position information, and selecting the 3G network to perform the CS domain service based on the stored 3G position information when the 2G network position information does not exist or the 2G network can not meet the requirement of the CS domain service. According to the technical scheme, UE (user equipment) can reside in two networks simultaneously, and the 2G network is preferably selected to perform the CS domain service, thus avoiding frequent reselection between the 2G network and the 3G network, and improving the communication quality.

Description

The method of simultaneously resident two nets in single deck tape-recorder double-standby terminal CS territory and related system, device

Technical field

The embodiment of the present invention relates to communication technical field, relates in particular to single deck tape-recorder double-standby terminal CS the territory simultaneously method of resident two nets and related system, device.

Background technology

Development along with the communication technology, 3G (3rd-generation, the third generation communication technology), LTE (LongTerm Evolution, Long Term Evolution), the high speed transfer of data communication network such as WLAN (Wireless Local Area Networks, WLAN (wireless local area network)) is obtaining applying more and more widely.The characteristics of these networks are that data service at a high speed can be provided, and some also support voice business are arranged simultaneously, and for example 3G network, can the support voice business when data service at a high speed is provided.

Current most 3G terminal is all the 2G/3G dual-mode handset, for example WCDMA/GSM bimodulus, TD-SCDMA/GSM dual-mode handset.Existing 2G/3G dual-mode terminal is when communicating business, usually preferentially reside in 3G network, can gravity treatment arrive 2G (secondgeneration, the second generation communication technology) network when 3G network has signal, when the 3G network signal recovers, 3G network is arrived in gravity treatment again.

Yet the existing 2G network coverage is good, and the situation that the covering level is not good often appears in 3G network, particularly indoor 3G poor signal.When communicating business, be easy to occur the situation of 3G terminal frequent gravity treatment between 2G internet and 3G network thus.In the process of gravity treatment, easily cause missed call between 2G internet and 3G network, affect thus the communication quality of speech business.

Summary of the invention

The embodiment of the present invention provides the method for simultaneously resident two nets in single deck tape-recorder double-standby terminal CS territory and related system, device, to improve the communication quality of 3G terminal speech business.

Wherein, the embodiment of the present invention the simultaneously method of resident two nets of a kind of single deck tape-recorder double-standby terminal CS territory is provided, be applied to single SIM card terminal, contain user ID in described SIM card, described method comprises:

Send 2G network site update request and the 3G network position updating request that carries identical described user ID to network side, after making described network side receive described 2G network site update request and 3G network position updating request, completing circuit exchange CS territory position update flow together with described terminal, thus make the CS territory of described terminal reside in 2G internet and 3G network;

When initiating CS territory service request, preferentially select described 2G network to carry out described CS territory business, when described 2G network does not meet described CS territory business need, select described 3G network to carry out described CS territory business.

The embodiment of the present invention also provides the method for simultaneously resident two nets in a kind of single deck tape-recorder double-standby terminal CS territory, is applied to network side, comprising:

2G network site update request and 3G network position updating request that receiving terminal sends, described terminal is single SIM card terminal, contain user ID in described SIM card, in described 2G network site update request and described 3G network position updating request, carry identical described user ID;

Completing circuit exchange CS territory position update flow together with described terminal, thus make the CS territory of described terminal reside in 2G internet and 3G network, preserve the positional information of the resident 2G network of described terminal and the positional information of 3G network simultaneously;

When the CS territory service request that receives that the calling subscriber sends, preferentially according to the positional information of the 2G network of preserving, select the 2G network to carry out described CS territory business, when not existing 2G network location information or described 2G network not to meet described CS territory business need, according to the positional information of the 3G network of preserving, select 3G network to carry out described CS territory business.

The embodiment of the present invention also provides a kind of communication system, comprising:

The 2G moving exchanging center MSC, 3G moving exchanging center MSC, Home Location Register HLR, and calling mobile exchanging center MSC;

Described 2G MSC is used for, the 2G network site update request that receiving terminal sends; Described terminal is alone family identification module SIM card, in described SIM card, contains user ID, and described 2G network site update request carries described user ID; Send the first network position updating request to described HLR, described first network position updating request carries described user ID, 2G network identity and 2G MSC sign;

Described 3G MSC is used for, and receives the 3G network position updating request that described terminal sends; Described 3G network position updating request also carries described user ID; Send the second network position updating request to described HLR, described second network position updating request carries described user ID, 3G network sign and 3G MSC sign;

Wherein, the type of place network when described 2G network identity and described 3G network sign send position updating request for identifying described terminal, described 2G MSC sign and described 3G MSC sign are for identifying the MSC of receiving position update request;

Described HLR is used for, preserve primary importance information according to the described first network position updating request received and described second network position updating request, the sign of the MSC of place network of network type and receiving position update request when described primary importance information comprises described terminal transmission position updating request; And notify described 2G MSC and described 3G MSC to insert user data, make the notified rear preservation second place information of described 2G MSC and described 3G MSC, described second place information comprises the location area information of place network when terminal sends position updating request; If have other MSC to preserve the second place information of haveing been friends in the past, notify this MSC to delete old second place information;

Described caller MSC is used for, and receives the CS territory service request that the calling subscriber sends, and inquires about the routing iinformation of described terminal to described HLR;

Described HLR also for, obtain routing iinformation according to the described primary importance information priority of preserving to described 2G MSC; Do not exist in described primary importance information while corresponding to the positional information of 2G network or described 2G network, not meeting described CS territory business need, to 3G MSC, obtain routing iinformation;

Described 2G MSC or described 3G MSC also for, return to routing iinformation according to the described second place information of preserving to described HLR, so that described HLR returns to the routing iinformation of described terminal to described caller MSC;

Described caller MSC also for, send call connection to the described 2G MSC that returns to routing iinformation or described 3GMSC, make described 2G MSC or described 3G MSC make a call to described terminal according to the described second place information of preserving.

The 2G/3G moving exchanging center MSC, Home Location Register HLR, and calling mobile exchanging center MSC;

Described 2G/3G MSC is used for, 2G network site update request and 3G network position updating request that receiving terminal sends; Described terminal is alone family identification module SIM card, in described SIM card, contains user ID, and described 2G network site update request and described 3G network position updating request carry identical described user ID; Send first network position updating request and second network position updating request to described HLR, described first network position updating request carries described user ID, 2G network identity and 2G/3G MSC sign, and described second network position updating request carries described user ID, 3G network sign and 2G/3G MSC sign;

Wherein, place network of network type when described 2G network identity and described 3G network sign send position updating request for identifying described terminal, described 2G/3G MSC sign is for identifying the MSC of receiving position update request;

Described HLR is used for, upgrade according to the described first network position updating request received and described second network position the primary importance information of preserving, the sign of the MSC of place network of network type and receiving position update request when described primary importance information comprises described terminal transmission position updating request; And notify described 2G/3G MSC to insert user data, carry described network type during notice, make the notified rear preservation second place information of described 2G/3GMSC, described second place information comprises the location area information of place network when described network type and terminal send position updating request;

Described HLR also for, obtain routing iinformation according to the described primary importance information of preserving to described 2G/3G MSC;

Described 2G/3G MSC also for, return to routing iinformation to described HLR, so that described HLR returns to the routing iinformation of described terminal to described caller MSC;

Described caller MSC also for, send call connection to the described 2G/3G MSC that returns to routing iinformation, described 2G/3G MSC makes a call to described terminal by the 2G network according to the second place information priority of preserving, while not existing 2G network location information or described 2G network not to meet CS territory business need in described second place information, described 2G/3G MSC crosses 3G network according to the second place information exchange of preserving and makes a call to described terminal.

Described HLR is used for, upgrade according to the described first network position updating request received and described second network position the primary importance information of preserving, the sign of the MSC of place network of network type and receiving position update request when described primary importance information comprises described terminal transmission position updating request; And notify described 2G/3G MSC to insert user data, the network type of carried terminal access during notice, make the notified rear preservation second place information of described 2G/3G MSC, described second place information comprises the location area information of place network when described network type and terminal send position updating request;

Described HLR also for, obtain the routing iinformation for the 2G network according to the primary importance information priority of preserving to described 2G/3G MSC, in described primary importance information, do not exist while corresponding to the positional information of 2G network or 2G network, not meeting CS territory business need, for to described 2G/3G MSC, obtaining the routing iinformation for 3G network;

Described 2G/3G MSC also for, return to the routing iinformation of specified network type to described HLR, so that described HLR returns to the routing iinformation of described terminal to described caller MSC;

Described caller MSC also for, send call connection to the described 2G/3G MSC that returns to routing iinformation, make described 2G/3G MSC make a call to described terminal according to described second place information and the routing iinformation preserved.

The embodiment of the present invention also provides a kind of terminal, and described terminal is single SIM card terminal, in described SIM card, contains user ID, and described terminal comprises:

The 2G processing module, for send the 2G network site update request of carrying described user ID to network side, after making described network side receive described 2G network site update request, completing circuit exchange CS territory position update flow together with described terminal, thus make the CS territory of described terminal reside in the 2G network;

The 3G processing module, for send the 3G network position updating request of carrying described user ID to network side, after making described network side receive described 3G network position updating request, completing circuit exchange CS territory position update flow together with described terminal, thus make the CS territory of described terminal reside in 3G network;

Select module, for when initiating CS territory service request, preferentially by described 2G processing module, select described 2G network to carry out described CS territory business, when described 2G network does not meet described CS territory business need, by described 3G processing module, select described 3G network to carry out described CS territory business.

The embodiment of the present invention also provides a kind of MSC, and described MSC is simultaneously for the 2G/3G MSC of 2G internet and 3G network, and described MSC comprises: receiver module, sending module, route are returned to module and are called out and select module;

Described receiver module is used for, 2G network site update request and 3G network position updating request that receiving terminal sends; Terminal is single SIM card, contains user ID in SIM card, and 2G network site update request and 3G network position updating request carry identical user ID; And the circuit switching (CS) territory of terminal is resident to 2G internet and 3G network, and preserve the positional information of resident 2G network and the positional information of 3G network;

Described sending module is used for, send first network position updating request and second network position updating request to HLR, the first network position updating request carries described user ID, 2G network identity and 2G/3G MSC sign, and the second network position updating request carries user ID, 3G network sign and 2G/3G MSC sign;

By sending first network position updating request and second network position updating request, make HLR upgrade according to the described first network position updating request received and described second network position the primary importance information of preserving, the sign of the MSC of place network of network type and receiving position update request when described primary importance information comprises described terminal transmission position updating request;

Described receiver module also for, receive HLR and receive the insertion user data notice sent after first network position updating request and second network position updating request, place network of network type when in this notice, carried terminal sends position updating request, notified rear preservation second place information, described second place information comprises the location area information of place network when described network type and terminal send position updating request;

Described receiver module also for, receive the request of obtaining routing iinformation that HLR sends, wherein, HLR is the request of obtaining routing iinformation that sends when receiving caller MSC query routing information request, caller MSC is when the CS territory service request that receives that the calling subscriber sends, and sends the request of query routing information to HLR;

Described route return module for, according to the request of HLR, to HLR, return to routing iinformation, so that HLR returns to the routing iinformation of terminal to caller MSC;

Call out and select module to be used for, receive the call connection that caller MSC sends according to routing iinformation, and to terminal, make a call by the 2G network according to the second place information priority of preserving, when the 2G network does not meet CS territory business need, cross 3G according to the second place information exchange of preserving and make a call to terminal.

The embodiment of the present invention also provides a kind of HLR, comprising: position is upgraded receiver module, is preserved module and route acquisition module;

Described position is upgraded receiver module and is used for, receive first network position updating request and second network position updating request that 2G moving exchanging center MSC and 3G MSC send respectively, described first network position updating request carries user ID, 2G network identity and 2G MSC sign, and described second network position updating request carries user ID, 3G network sign and 3G MSC sign;

Wherein, the type of place network when described 2G network identity and described 3G network sign send position updating request for identifying terminal corresponding to described user ID, described 2G MSC sign and described 3GMSC sign are for identifying the MSC of receiving position update request;

Described preservation module is used for, preserve primary importance information according to the described first network position updating request received and described second network position updating request, the sign of the MSC of place network of network type and receiving position update request when described primary importance information comprises described terminal transmission position updating request; And notify described 2G MSC and described 3G MSC to insert user data, and making the notified rear preservation second place information of described 2G MSC and described 3G MSC, described second place information comprises the location area information of place network when terminal sends position updating request; If have other MSC to preserve the second place information of haveing been friends in the past, notify these other MSC to delete old second place information; Described primary importance information comprises the sign of described terminal at the MSC of 2G internet and 3G network simultaneously;

Described route acquisition module is used for, the request of the routing iinformation of the described terminal of inquiry that reception caller MSC sends, and obtain routing iinformation according to the described primary importance information of preserving to described 2G MSC; Do not exist in described primary importance information while corresponding to the positional information of 2G network or 2G network, not meeting described CS territory business need, to 3G MSC, obtain routing iinformation; Caller MSC is when the CS territory service request that receives that the calling subscriber sends, and sends the request of query routing information to described HLR;

Described route acquisition module also for, return to the routing iinformation of described terminal to described caller MSC.

The method of simultaneously resident two nets in the single deck tape-recorder double-standby terminal CS territory of the embodiment of the present invention and related system, device, terminal is in start or after position moves, send 2G network site update request and the 3G network position updating request of the user ID of carrying this terminal to network side, make this terminal can reside in 2G internet and 3G network simultaneously; When carrying out CS territory business, terminal or network side preferentially select the 2G network to communicate, and, when the 2G network does not meet CS territory business need, select 3G network to communicate.Because terminal in the embodiment of the present invention resides in 2G internet and 3G network simultaneously, and CS territory business preferentially selects the 2G network to communicate, due to the 2G network, to compare the common covering of 3G network signal more better, therefore, preferential select the 2G network to improve to take the communication quality of speech business as main CS territory business, avoid the frequent gravity treatment between 2G internet and 3G network in the prior art, improved communication quality; Simultaneously, due in the embodiment of the present invention when the 2G network does not meet CS territory business need and 3G network and can meet CS territory business need, select 3G network to carry out CS territory business, because terminal has resided in 3G network, therefore, do not need to initiate read apparatus message, position update flow, can not increase the connection time delay.

The accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

The flow chart of the method for simultaneously resident two nets in the single deck tape-recorder double-standby terminal CS territory that Fig. 1 provides for the embodiment of the present invention one;

The flow chart of the method for simultaneously resident two nets in the single deck tape-recorder double-standby terminal CS territory that Fig. 2 provides for the embodiment of the present invention two;

The flow chart of the method that the terminal position that Fig. 3 provides for the embodiment of the present invention three upgrades;

Fig. 4 A is the schematic diagram that 2G CS domain core net and 3G CS domain core net are separately disposed;

Fig. 4 B is the schematic diagram that 2G CS domain core net and the unification of 3G CS domain core net are disposed;

The flow chart of the position update flow that Fig. 5 A provides for the embodiment of the present invention four;

The schematic diagram that Fig. 5 B is the resident core net of terminal in Fig. 5 A illustrated embodiment;

The flow chart of the position update flow that Fig. 5 C provides for the embodiment of the present invention six;

The schematic diagram that Fig. 5 D is Fig. 5 C illustrated embodiment Position Updating;

The schematic diagram of the position update flow Position Updating that Fig. 5 E provides for the embodiment of the present invention seven;

The flow chart of the network side processed voice called service that Fig. 6 provides for the embodiment of the present invention eight;

The flow chart of the speech called flow process that Fig. 7 A provides for the embodiment of the present invention nine;

The flow chart of the speech called flow process that Fig. 7 B provides for the embodiment of the present invention ten;

The flow chart of the speech called flow process that Fig. 7 C provides for the embodiment of the present invention 11;

The flow chart of the reception short message service that Fig. 8 provides for the embodiment of the present invention 12;

The flow chart of the reception short message service flow process that Fig. 9 A provides for the embodiment of the present invention 13;

The flow chart of the reception short message service flow process that Fig. 9 B provides for the embodiment of the present invention 14;

The flow chart of the reception short message service flow process that Fig. 9 C provides for the embodiment of the present invention 15;

The schematic diagram of the terminal that Figure 10 provides for the embodiment of the present invention 16;

The structural representation of the MSC that Figure 11 provides for the embodiment of the present invention 17;

The structural representation of the HLR that Figure 12 provides for the embodiment of the present invention 18.

Embodiment

For the purpose, technical scheme and the advantage that make the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.

Embodiment mono-

The flow chart of the method for simultaneously resident two nets in the single deck tape-recorder double-standby terminal CS territory that Fig. 1 provides for the embodiment of the present invention one, be applied to terminal (User Equipment is designated hereinafter simply as: UE), as shown in Figure 1, the method comprises:

Step 101, send 2G network site update request and the 3G network position updating request carry the same subscriber sign to network side, after making network side receive 2G network site update request and 3G network position updating request, complete CS (circuit switching together with UE, Circuit Switching) territory position update flow, thus make the CS territory of UE reside in 2G internet and 3G network;

The executive agent of the present embodiment is that (User Equipment, be designated hereinafter simply as: UE) terminal.UE in the present embodiment can be alone family identification module (SIM) card terminal, contain user ID in this SIM card, this UE is the 2G/3G dual-mode terminal, this UE is used a usim card, USIM is global Subscriber Identity Module (Universal SubscriberIdentity Module), be the subscriber card that 3G network is introduced, can be considered as special SIM card, usim card and SIM card are not strictly distinguished in the embodiment of the present invention.

It should be noted that, in the embodiment of the present invention, " the CS territory is resident to 2G (or 3G) network " also be can be understood as: by " the CS territory is attached to 2G (or 3G) network ", be that terminal initiation LAU (LocationArea Update, location area updating) process is attached to 2G (or 3G) network.

UE is after start or, after the 2G of UE and 3G network position be moved, UE sends 2G and 3G network position updating request (sequencing does not limit) to network side; Concrete, UE can to 2G network and mobile switching centre corresponding to 3G network, (Mobile Switching Center be designated hereinafter simply as: MSC) send position updating request; Wherein, the user ID of in 2G and 3G network position updating request, carrying this UE, follow-uply make this UE can reside in 2G and 3G network by position update flow.

Above-mentioned user ID can for international mobile subscriber identity (International MobileSubscriber Identity, referred to as: IMSI), network side can be identified UE by user ID.Wherein, in the embodiment of the present invention, terminal is used a SIM (USIM) card, in 2G network site update request, with in the 3G network position updating request, carries identical user ID.

By this step, can complete two resident at two heterogeneous networks of terminal CS territory, to carry out CS territory business (being mainly speech business and short message service).In practical application, in some cases, if when first network does not meet resident condition, can be only resident to second network, then whether periodically detecting first network meets resident condition, when meeting, simultaneously resident to first network.For example, when the 2G signal does not meet resident condition, the CS territory can only reside in 3G network, and UE periodically detects the 2G signal, and when the 2G signal recovers, it is resident in 2G internet and 3G network that recover in the CS territory.For 2G/3G " the single deck tape-recorder list is treated " dual-mode terminal that is different from standard, the UE in the present embodiment can be called 2G/3G " single deck tape-recorder is two to be treated " dual-mode terminal.

Complete resident after, terminal can also be preserved 2G positional information and the 3G positional information of resident network, be specially certain lane place in the 2G network and certain lane place in 3G network, when if follow-up terminal finds that the lane place of handled lane place and preservation is inconsistent, launch position is new technological process more, resident to current lane place.

Step 102, when initiating CS territory business, preferentially select the 2G network to carry out CS territory business, when the 2G network does not meet CS territory business need, select 3G network to carry out CS territory business.

UE, when initiating CS territory business, preferentially selects the 2G network to communicate according to the positional information (certain lane place in the 2G network) of the network of preserving, for example:

When UE initiates the voice caller, UE, according to the business network selection strategy of configuration, preferentially makes a call in the 2G network according to the positional information of the 2G network of preserving, and this call flow is consistent with normal process;

When UE initiatively sends SMS message, UE, according to the business network selection strategy of configuration, preferentially sends SMS message in the 2G network, and this flow process is consistent with normal process.

Further, if the 2G network does not meet CS territory business need (as poor as the 2G network signal or the 2G network load is too high or the video call service that the 2G network is not supported), can select 3G network to communicate.

Further, consider the impact reduced existing ordinary terminal, need to distinguish the single deck tape-recorder double-standby terminal, network is only processed according to the present invention the single deck tape-recorder double-standby terminal.The single deck tape-recorder double-standby terminal carries single deck tape-recorder double-standby terminal sign when sending position updating request, makes differentiating and processing after Network Recognition single deck tape-recorder double-standby terminal.

UE in the present embodiment resides in 2G internet and 3G network simultaneously, but usim card only has one, can only preserve a sets of data, another set of data can be kept at UE memory space (flash memory for example, FlashMemory) in, by UE on behalf of management.

By UE, on behalf of the data of management, specifically comprised:

The data message that position is relevant comprises: location area information (Location Area Information, referred to as: LAI), position is new state (Location update status) more;

Temporary identity identification (Temporary Mobile Subscriber Identity, referred to as: TMSI);

The network initial search parameters, such as frequency etc.

The embodiment of the present invention, UE, in start or after position moves, sends 2G network site update request and the 3G network position updating request of the user ID of carrying this UE to network side, make this UE can reside in 2G internet and 3G network simultaneously; When carrying out CS territory business, UE preferentially selects the 2G network to communicate, if the 2G network signal does not meet CS territory business need, selects 3G network to communicate.Because UE in the embodiment of the present invention resides in 2G internet and 3G network simultaneously, and preferentially select the 2G network to communicate for CS territory business, because the information covering of 2G network is generally good than 3G network, therefore, preferential select the 2G network to improve to take the communication quality of speech business as main CS territory business, avoid the frequent gravity treatment between 2G internet and 3G network, improved communication quality; And, when the 2G network signal does not meet the demands or while using video call service, can also use 3G network as backup, while selecting 3G network to carry out CS territory business, UE has resided in 3G network, therefore, do not need to initiate read apparatus message, position update flow, can not increase the connection time delay.

Embodiment bis-

The flow chart of the method for simultaneously resident two nets in the single deck tape-recorder double-standby terminal CS territory that Fig. 2 provides for the embodiment of the present invention two, be applied to network side, and as shown in Figure 2, the method comprises:

2G network site update request and 3G network position updating request that step 201, reception UE send complete CS territory position update flow, thereby make the CS territory of UE reside in 2G internet and 3G network together with UE; Also preserve the positional information of resident 2G network and the positional information of 3G network simultaneously.

UE in the present embodiment is single SIM card terminal, contains user ID in SIM card, in 2G network site update request and 3G network position updating request, carries identical user ID.

The relevant device that the executive agent of the present embodiment is network side (hereinafter to be referred as network side).UE, after start or after the network site of UE is moved, sends position updating request to network side; Network side receives this position updating request that UE sends, and completes CS territory position update flow together with UE, thereby makes the CS territory of UE reside in 2G internet and 3G network.

This position updating request comprises the user ID of this UE, and carries the current positional information of this UE.Concrete, as UE, after the position of 2G network is upgraded, network side receives the 2G network site update request that UE sends; As UE, after the position of 3G network is upgraded, network side receives the 3G network position updating request that UE sends.

UE sends position updating request to 2G internet and 3G network, and network side, according to this position updating request, is preserved 2G network location information and the 3G network positional information of UE, makes this UE reside in 2G internet and 3G network simultaneously.

Wherein, network side can comprise that (Home Location Register is designated hereinafter simply as: the network element device such as HLR) for MSC and attaching position register.MSC receives the position updating request that UE sends, and then the sign of the user ID of this UE, network identity and this MSC is sent to HLR; HLR returns and inserts the user data indication to MSC, and then MSC preserves the positional information of this UE under this network identity.

Step 202, when the CS territory service request that receives that the calling subscriber sends, preferentially according to the positional information of the 2G network of preserving, select the 2G network to carry out CS territory business; When the positional information that does not have the 2G network or 2G network do not meet CS territory business need, according to the positional information of the 3G network of preserving, select 3G network to carry out CS territory business.

Wherein, the UE in the present embodiment is the called subscriber.Network side, when receiving calling subscriber CS territory service request (as voice call service request or short message service request), preferentially selects the 2G network to communicate according to the positional information of the 2G network of preserving.

Further, if do not exist the positional information of 2G network or 2G network not to meet CS territory business need, network side selects 3G network to communicate according to the positional information of the 3G network of preserving, and for example network side can be selected to send audio call from 3G network or receive short message.

Concrete, the positional information of described 2G network and the positional information of described 3G network comprise primary importance information and second place information;

Described primary importance information comprises network type and the MSC sign be stored in Home Location Register HLR, wherein, the type of the network at place when network type is terminal transmission position updating request, MSC is designated the sign of the MSC of receiving position update request;

Described second place information comprises described network type (type of place network while being terminal transmission position updating request) and the location area information be stored in moving exchanging center MSC, lane place when wherein, described location area information is terminal transmission position updating request in the network of place.

The embodiment of the present invention, after moving in UE start or position, network side receives the position updating request of the user ID of carrying this UE that UE sends, and makes this UE can reside in 2G internet and 3G network simultaneously; When carrying out CS territory business, network side preferentially selects the 2G network to communicate; If the 2G network signal does not meet CS territory business need, select 3G network to communicate.Because UE in the embodiment of the present invention resides in 2G internet and 3G network simultaneously, and network side preferentially selects the 2G network to communicate for CS territory business, because the information covering of 2G network is generally good than 3G network, therefore, preferential select the 2G network to improve to take the communication quality of speech business as main CS territory business, avoid the frequent gravity treatment between 2G internet and 3G network, improved communication quality; And when not meeting the demands, can also use the 2G network signal 3G network as backup, while selecting 3G network to carry out CS territory business, because UE has resided in 3G network, therefore, do not need to initiate read apparatus message, position update flow, thereby can not increase the connection time delay.

Further, consider the process of network design, exist subnetwork to support the two standby service abilities (meeting the requirement of the embodiment of the present invention to network side) of single deck tape-recorder, subnetwork is not supported the two standby service abilities of single deck tape-recorder, UE needs the recognition network ability, only resident to a network when network does not possess the two standby service ability of single deck tape-recorder.

In order to make UE recognition network ability, network side can carry the network capabilities sign in broadcast system message, for example: at RNS (Radio Network Subsystem, radio network sub-system) above whether configuration network supports the two standby service abilities of single deck tape-recorder, when having configured this business of support, carry the two ability label for the treatment of of network support single deck tape-recorder in broadcast system message, judge network capabilities in the UE read system message, terminal work mode is set, only have the system message of 2G/3G all to indicate the support single deck tape-recorder two when ability, just enable the two standby function patterns of single deck tape-recorder.

Further, consider the impact reduced existing ordinary terminal, need to distinguish the single deck tape-recorder double-standby terminal, Network Recognition single deck tape-recorder double-standby terminal, only process according to the present invention the single deck tape-recorder double-standby terminal.

It should be noted that, in real network is disposed, also need VLR (Visitor LocationRegister, VLR Visitor Location Register) store the information relevant with business, for convenience of description, various embodiments of the present invention are not strictly distinguished MSC and VLR, and the function in VLR all is incorporated in MSC and is discussed, and the situation that those skilled in the art can dispose according to real network realizes the scheme in the embodiment of the present invention.

In the actual deployment of network, MSC can comprise the 2G MSC for the treatment of the 2G business, for the treatment of the 3G MSC of 3G business and for the treatment of the caller MSC of calling service.The above-mentioned division to MSC is based on function and is divided, and in actual process, the MSC that completes these functions can be a physical NE (MSC), or a plurality of physical NE.For example, 2G MSC and 3G MSC are completed by two physics MSC respectively, or 2G MSC and 3G MSC complete by a physics MSC, remember that this physics MSC is 2G/3G MSC.In like manner, caller MSC also can be used same physics MSC with 2G MSC or 3G MSC or 2G/3G MSC.

Below in each embodiment, for convenience of description, use respectively 2G MSC, 3G MSC, caller MSC and 2G/3G MSC mean a physics MSC separately.The example that those skilled in the art can provide by the embodiment of the present invention, and realize this programme in conjunction with real network deployment scenario (adopting one or more physics MSC).

Embodiment of the present invention technical scheme can be total be divided into two stages, first stage is position new stage more, for completing 2G and 3G position, upgrades; Second stage is CS territory Business Processing stage (audio call and short message), selects 2G MSC or 3G MSC to carry out CS territory Business Processing after receiving CS territory business for caller MSC or SMC (Short Message Center, short message service center).The technical scheme that below will provide the embodiment of the present invention by specific embodiment is specifically described.

Embodiment tri-

Based on above-described embodiment one, two, a kind of method that the embodiment of the present invention three provides terminal position to upgrade, the network side of take comprises that MSC, HLR network element device describe as example, the flow chart of the method that the terminal position that Fig. 3 provides for the embodiment of the present invention three upgrades, referring to Fig. 3, the method comprises:

Step 301, UE send the position updating request of the user ID of carrying this UE to MSC.

UE, in when start or when network site occurring moving, sends position updating request to MSC.The MSC here refers to MSC corresponding to network rear corresponding MSC or the UE occurrence positions of place network of UE start moves (as from the 2G Network Mobility to 3G network).It should be noted that, UE only moves (for example from a 2G lane place, moving to another 2G lane place) at MSC in responsible network sometimes, and now MSC is same MSC with original MSC; In addition, when UE sends request, do not need to know concrete MSC, and only need to send request in current network, get final product, the rear extended meeting MSC corresponding by network receives and processes this request, and the embodiment of the present invention (comprising other embodiment) is explained in the mode of " UE sends position updating request to MSC " for the process of position updating request from UE to MSC is described, this statement does not also mean that UE needs oneself to know the MSC that will send, and send request to this MSC.

The user ID of UE, for UE user is identified, can be for example IMSI mentioned above.

In addition, UE also can carry " terminal capability sign " in position updating request, whether possesses the single card terminal of resident two networks simultaneously (or claiming the single deck tape-recorder double-standby terminal) for the embodiment of the present invention for identifying UE, if so, MSC is undertaken by the follow-up flow process of the embodiment of the present invention after receiving; If not, MSC walks normal handling process in prior art.The single deck tape-recorder double-standby terminal provided in compatible terminal of the prior art and the embodiment of the present invention better by carrying processing that " terminal capability sign " can make network side.

After step 302, MSC receive the position updating request of UE transmission, to HLR, send position updating request, and carry user ID, network identity and MSC sign in request;

It should be noted that, the position updating request that the position updating request that MSC sends to HLR and UE send to MSC is two different position updating request, and its specific implementation can be referring to the explanation in standard.

The user ID here is identical with the user ID in step 301; When the network identity here sends position updating request for marking terminal, the type of place network, for example, be 2G network or 3G network; The MSC sign here is for identifying the MSC of receiving position update request, and for example, when a plurality of MSC is arranged, MSC is designated MSC1 or MSC2.

The positional information that step 303, HLR preserve UE according to each sign in the position updating request received;

In order to distinguish the positional information that in subsequent step, MSC preserves, claim that the positional information here is " primary importance information ", final primary importance information is: certain user (being determined by user ID) is at certain network (being determined by network identity), corresponding to certain MSC (being determined by the MSC sign).For example, user A is at the 2G network, and corresponding MSC is MSC1.

It should be noted that, the position updating request sent when UE is the Network Mobility corresponding at MSC network corresponding to another MSC, HLR also will return and delete the user data indication to Anchor MSC, so that Anchor MSC is deleted the positional information of this UE wherein, in the middle of Indication message, should carry the type (as the 2G network) of the positional information that will delete and with instruct MS C, corresponding positional information be deleted.

Be while moving in the network corresponding at MSC when UE sends position updating request, after MSC receives this position updating request in step 302, directly preserve the positional information of this UE under the current network sign, and without notice HLR.This is because UE is moved in MSC, and for before mobile and for after mobile, this UE corresponding MSC under the current network sign is MSC, so without the record in change HLR.

Step 304, HLR send " insertion user data " message to MSC, carry network identity in message; The network identity here is identical with the implication that the network identity in step 302 means;

The positional information that step 305, MSC also preserve UE according to the message received;

Claim that the positional information here is " second place information ", so as with HLR in " primary importance information " distinguish.The second place information recorded in MSC is specially: certain user is arranged in certain lane place of certain network.For example, user A is arranged in the 2G1 lane place of 2G network, and the 2G1 here means a lane place of 2G network, similarly, hereinafter with 2G2, means another lane place of 2G network, and 3G1,3G2 mean two lane place of 3G network.In MSC, do not need to record MSC information as in HLR, because this information MSC oneself knows yet.

In fact, in step S302, MSC also can record second place information after receiving the updating of terminal position request.The positional information when embodiment of the present invention preserves terminal to MSC and HLR does not limit, as long as there is the positional information of terminal position after upgrading in MSC and HLR.

After step 305, during the service request of if network side receives that the calling subscriber sends CS territory, need to select the terminal occurrence positions to move rear resident network (completing resident by above-mentioned position update flow) and carry out this CS territory business, the network of network side after selecting to upgrade according to the positional information of the positional information of the 2G network after the renewal of preserving and/or 3G network carried out this CS territory business.

In addition, in various embodiments of the present invention, UE is not limited to just send position updating request in start or position after moving, but all sends position updating request when meeting any position renewal trigger condition (as periodic location update); Wherein trigger condition existing specific definition in consensus standard, do not repeat them here.When UE sends position updating request, corresponding MSC can upgrade positional information wherein according to this position updating request, and whether MSC can movement between MSC occur or whether for for the first time in this MSC registration according to this UE, judge whether to upgrade the information in HLR, if the change that does not cause the MSC that UE is corresponding is upgraded in the position of UE, without the record upgraded in HLR.

In various embodiments of the present invention, 2G CS domain core net and 3G CS domain core net can separately be disposed, and 2G network, 3G network correspond respectively to a MSC; Also can unify deployment is that 2G, 3G network are all corresponding to a MSC.Fig. 4 A is the schematic diagram that 2G CS domain core net and 3G CS domain core net are separately disposed, and Fig. 4 B is the schematic diagram that 2G CS domain core net and the unification of 3G CS domain core net are disposed.Wherein, send the situation of position updating request according to UE, and the deployment scenario of 2G CS domain core net and 3G CS domain core net, the process difference of position update flow.Below by Fig. 5 A-Fig. 5 E, the position update flow shown in Fig. 3 is described in detail.

Embodiment tetra-

The flow chart of the position update flow that Fig. 5 A provides for the embodiment of the present invention four, the schematic diagram that Fig. 5 B is the resident core net of terminal in Fig. 5 A illustrated embodiment, in the present embodiment, a lane place (3G1) that is positioned at a lane place (2G1) of 2G network and is positioned at 3G network during the UE start, complete resident at 2G network and 3G network by 2G and 3G position update flow, as shown in Figure 5A, specifically comprise:

Step 501A, UE send the position updating request of the 2G network that carries the UE user ID to MSC1.

Step 502A, MSC1 send the position updating request of carrying user ID, network identity and MSC sign to HLR;

Because the position that is the 2G network is upgraded, so network identity is " 2G network " sign (being that the indication network type is the 2G network); Referring to Fig. 5 B, due to the 2G network, corresponding MSC is MSC1, so the MSC here is designated " MSC1 " sign (being that instruct MS C is MSC1).

Send position updating request by MSC1, HLR just can preserve following terminal primary importance information after receiving: i.e. the terminal use A of 2G network, and the MSC of correspondence is MSC1; Use in the drawings:

" user A:2G network: MSC1 " means.Wherein, user A is the UE in the present embodiment.

Above-mentioned positional information also can be meaned by the mode of following table 1, to facilitate explanation.

Table 1

The user	Network type	The MSC sign
			Terminal use A	The 2G network	MSC1

When specific implementation, this part can be preserved temporarily, and subsequent step (as 504A) is saved in actual memory block after completing again by the time, if subsequent step is failed, can discharge the content of interim preservation.In fact, in the embodiment of the present invention, finish rear preservation positional information as long as upgrade in position, and do not preserved after not being limited to which step.

Step 503A, HLR send " insertion user data " message to MSC1, carry network identity in message;

Catch up with that to state in step 502A network identity the same, the network identity here is also " 2G network " sign, for allowing MSC according to this sign preservation second place information.

By step 503A, can be so that MSC1 preserves terminal positional information according to the message received;

The terminal second place information here is: terminal is arranged in which lane place of which network.As shown in Figure 5 B, terminal is arranged in the 2G1 lane place of 2G network, and therefore, the information of preservation is " terminal use A is positioned at the 2G1 lane place ", in Fig. 5 A, with " user A:2G network: 2G1 ", is meaned.Above-mentioned positional information also can be meaned by the mode of following table 2, to facilitate explanation.

Table 2

The user	Network type	Lane place
			Terminal use A	The 2G network	2G1

As described in front embodiment tri-, the step of MSC1 preservation terminal positional information is carried out after also can being placed on step 501A.

Step 504A, MSC1 send " inserting user data confirms " message to HLR.

Step 505A, HLR send " position is upgraded and confirmed " message to MSC1.

Step 506A, MSC1 send " position is upgraded and accepted " message to UE.

Flow process and each message in step 503A-step 506A have definition in standard, and those skilled in the art can realize above-mentioned steps according to the explanation in standard, do not repeat them here.Completed UE by above-mentioned steps and upgraded in the position of 2G network, and preserved the positional information of terminal on HLR and MSC.

In like manner, flow process and the above-mentioned steps of carrying out the position renewal at 3G network are similar, comprising:

Step 507A, UE send the position updating request of the 3G network that carries the UE user ID to MSC1.

Step 508A, MSC1 send user ID, carry the position updating request of network identity and MSC sign to HLR; Network identity is specially " 3G network ", and the MSC sign is still " MSC1 "; After this step, the positional information for the user in HLR becomes: " user A:2G network: MSC1, and 3G network: MSC1 ".

Step 509A, HLR send " insertion user data " message to MSC1, carry network identity in message; Network identity is specially " 3G network "; After MSC1 receives message, increase the lane place of 3G in positional information, as shown in Figure 5 B, the 3G lane place is 3G1 again, and therefore, the last positional information of terminal in MSC1 is " user A:2G1 and 3G1 ".

It should be noted that, if there are other MSC to preserve the terminal location district information of haveing been friends in the past, notify this MSC to delete old terminal location district information.For example, after supposing to upgrade, by MSC2,

process

2G or 3G business, need the old information in MSC1 is deleted.When sending deletion message, also carry network type, make old MSC (as MSC1) delete the second place information of specified network type, as delete " 2G network: 2G3 " positional information of user A.

Step 510A, MSC1 send " inserting user data confirms " message to HLR.

Step 511A, HLR send " position is upgraded and confirmed " message to MSC1.

Step 512A, MSC1 send " position is upgraded and accepted " message to UE.

Pass through said process, can complete the location area updating of terminal at 2G network and 3G network, wherein, step 501A-step 506A is that the position that UE initiates in the 2G1 lane place of 2G network MSC1 is upgraded, step 507A-step 512A is that the position that UE initiates in the 3G1 lane place of 3G network MSC1 is upgraded, and the flow process that these two kinds of positions are upgraded is similar.In addition, the present embodiment does not limit the order of 2G and 3G network renewal, that is to say, can first perform step 507A-512A yet, then perform step 501A-506A.

Embodiment five

The embodiment of the present invention five provides more new technological process of another location, and the application scenarios of this position update flow is: after the UE start, CS territory two, place network (also needing resident 2G network and 3G network) corresponds respectively to a MSC, for example, supposes here:

The 2G network is corresponding to MSC1;

3G network is corresponding to MSC2;

For this scene, terminal, when carrying out 2G or the renewal of 3G position, sends position updating request to MSC1 (upgrading corresponding to the 2G position) and MSC2 (upgrading corresponding to the 3G position) respectively; MSC1, MSC2 and HLR processing method can, referring to the step in embodiment tetra-, not repeat them here.

Finally, the customer position information of preserving in HLR is: " user A:2G network: MSC1, and 3G network: MSC2 "; The customer position information of preserving in MSC1 and MSC2 is corresponding to certain lane place in certain network (be equivalent to the positional information in MSC in embodiment tri-is splitted into to two, preserved separately by two MSC).

In the embodiment of the present invention, when HLR sends when inserting subscriber data message or deleting subscriber data message to MSC1 or MSC2, can not carry network identity, because each MSC is only corresponding to a network, this MSC does not need to distinguish 2G network or 3G network, therefore just without carrying network identity.In like manner, in second place information also without the information of storage networking type.

Embodiment six

The flow chart of the position update flow that Fig. 5 C provides for the embodiment of the present invention six, the schematic diagram that Fig. 5 D is Fig. 5 C illustrated embodiment Position Updating, in the scene of the present embodiment application:

(2G, 3G network are corresponding to same MSC) disposed in core net unification, as shown in Figure 5 D, MSC1 both corresponding to 2G network (lane place 2G1 and 2G2) also corresponding to 3G network (lane place 3G1 and 3G2); MSC2 is both corresponding to 2G network (as 2G3,2G4), also corresponding to 3G network (as 3G3,3G4).UE is arranged in the network that MSC1 is corresponding (2G2,3G2) at the beginning, and subsequent movement is to network (2G3,3G3) corresponding to MSC2.

As shown in Figure 5 C, embodiment of the present invention position update flow comprises:

Step 501C, UE send the position updating request of the 3G network that carries the UE user ID to MSC2.

As described in Fig. 5 C, UE moves, and the 3G network position of UE moves to the 3G3 lane place of MSC2 from the 3G2 lane place of MSC1, thus the operation of UE execution step 501C.

After step 502C, MSC2 receive the position renewal of UE initiation, inquiry is the 3G position record without this user at this MSC2, to HLR, sends and carries the position updating request that user ID, 3G network sign and MSC2 identify.

Because the position that is 3G network is upgraded, so network identity is " 3G network " sign (being that the indication network type is 3G network); Referring to Fig. 5 D, the MSC that moves rear correspondence due to 3G network is MSC2, so the MSC here is designated " MSC2 " sign (being that instruct MS C is MSC2).

Send position updating request by MSC2, HLR just can preserve following terminal primary importance information after receiving: i.e. the terminal use A of 3G network, and the MSC of correspondence is MSC2; Use in the drawings:

" user A:3G network: MSC2 " means.Wherein, user A is the UE in the present embodiment.

Above-mentioned positional information also can be meaned by the mode of following table 3, to facilitate explanation.

Table 3

The user	Network type	The MSC sign
			Terminal use A	3G network	MSC2

Step 503C, HLR send " insertion user data " message to MSC2, carry network identity in message; The same with the network identity in above-mentioned steps 502C, the network identity here is also " 3G network " sign.

By step 503C, can be so that MSC2 preserves terminal second place information according to the message received; The second place information here is: terminal is arranged in which lane place of which network.As shown in Figure 5 D, be positioned at 3G network 3G3 lane place after fast mobile terminal, therefore, the information of preservation is " the 3G3 lane place that terminal use A is positioned at 3G network ", in Fig. 5 C, with " user A:3G network: 3G3 ", is meaned.Above-mentioned positional information also can be meaned by the mode of following table 4, to facilitate explanation.

Table 4

The user	Network type	Lane place
			Terminal use A	3G network	3G3

As described in front embodiment tri-, the step of MSC2 preservation terminal positional information is carried out after also can being placed on step 501C.

Step 504C, MSC2 send " inserting user data confirms " message to HLR.

After " inserting user data confirms " message that step 505C, HLR reception MSC2 returns, HLR sends " deletion user data " message of carrying the 3G network sign to MSC1.

UE moves to MSC2 from MSC1, and the positional information of the UE that MSC1 Central Plains will be pre-existed is thus deleted.When sending message, also carry network type, make old MSC (MSC1) delete the second place information of specified network type.

Step 505C can not need after by the time carrying out 503C, 504C just to carry out, but can with the 503C executed in parallel.

Step 506C, MSC1 receive the deletion subscriber data message, according to the sign of the 3G network in message, delete the user 3G position record position information in MSC1, and return to user data to HLR and delete acknowledgement message.

After step 507C, HLR receive the deletion user data acknowledgement message of MSC1, HLR sends " position is upgraded and confirmed " message to MSC2.

Step 508C, MSC2 send " position is upgraded and accepted " message to UE.

Completed UE by above-mentioned steps and upgraded in the position of 3G network, and preserved the positional information of terminal on HLR and MSC.

In like manner, flow process and the above-mentioned steps of carrying out the position renewal at the 2G network are similar, comprising:

Step 509C, UE send the position updating request of the 2G network that carries the UE user ID to MSC2.

As described in Fig. 5 D, UE moves, the 2G3 lane place of the 2G network site of UE from the 2G2 location area updating of MSC1 to MSC2, the operation of UE execution step 509C thus.

It should be noted that, in the present embodiment, 3G network position and the 2G network site of UE all move to MSC2 from MSC1, yet the present embodiment is not limited to this, for example: the 3G network position of UE can move to MSC2 from MSC1, and the 2G network site can move to MSC4 from MSC3.

Step 510C, MSC2 send user ID, carry the position updating request of network identity and MSC sign to HLR; Network identity is specially " 2G network ", and MSC is designated " MSC2 "; After this step, the positional information for the user in HLR becomes: " user A:2G network: MSC2, and 3G network: MSC2 ".

Step 511C, HLR send " insertion user data " message to MSC2, carry network identity in message; Network identity is specially " 2G network "; After MSC2 receives message, increase the lane place of 2G in positional information, as shown in Figure 5 D, the 2G lane place is 2G3 again, and therefore, the last second place information of terminal in MSC2 is " user A:2G network: 2G3 and 3G network: 3G3 ".

Step 512C, MSC2 send " inserting user data confirms " message to HLR.

Step 513C, HLR send the deletion subscriber data message of carrying the 2G network identity to MSC1.

Step 514C, MSC1 receive the deletion subscriber data message, according to the 2G network identity in message, delete the user 2G position record in MSC1, and return to user data to HLR and delete acknowledgement message.

Step 515C, HLR send " position is upgraded and confirmed " message to MSC2.

Step 516C, MSC2 send " position is upgraded and accepted " message to UE.

By said process, can complete the location area updating of terminal at 2G network and 3G network.Wherein, step 501C-step 508C is that UE upgrades in the position of 3G network, and step 509C-step 516C is that UE upgrades in the position of 2G network, and the flow process that these two kinds of positions are upgraded is similar.In addition, the present embodiment does not limit the order of 2G and 3G network renewal.

Embodiment shown in Fig. 5 C and Fig. 5 D is the scene that 2G and 3G reside in same core net, and in the present embodiment, the position of UE is moved and is not limited to this, can also be applied in the scene that 2G and 3G reside in different core net.

Embodiment seven

The embodiment of the present invention seven provides more new technological process of another location, and the application scenarios of this position update flow is: resident two networks in the CS territory of UE are corresponding to same MSC, and UE occurrence positions in same MSC moves.The schematic diagram of the position update flow Position Updating that Fig. 5 E provides for the embodiment of the present invention seven.As shown in Fig. 5 E, the 2G network site of UE is from the 2G1 location area updating to the 2G2 lane place, and the 2G network site of UE is from the 3G1 location area updating to the 3G2 lane place; Wherein 2G1 and 2G2 belong to same MSC, and 3G1 and 3G2 belong to same MSC.In the present embodiment, the MSC that the MSC that the 2G network site belongs to and 3G network position belong to can be same, can not be also same, and shown in Fig. 5 E is the situation that 2G and 3G network position belong to same MSC.In the present embodiment, UE initiates respectively the renewal of 2G network site and the 3G network position is upgraded, and MSC judgement position more new capital belongs to the renewal of intra-office position, and MSC upgrades and is kept at two positional information records in VLR, and does not need to notify HLR.Finally, the customer position information of preserving in MCS is " user A:2G network: 2G2 and 3G network: 3G2 ".

By the position update flow in the embodiment shown in Fig. 5 A-Fig. 5 E, UE can reside in 2G internet and 3G network in the CS territory simultaneously.

Upgrade embodiment by above-mentioned position, can realize two resident at two nets of terminal CS territory, the handling process in the time of below specifically introducing network side and carry out voice and short message service.

Embodiment eight

In the embodiment of the present invention, when network side is received user's call request (speech business), preferentially according to the terminal positional information (being kept at respectively in MSC and HLR) of preserving, select the 2G network to carry out CS territory Business Processing.

The flow chart of the network side processed voice called service that Fig. 6 provides for the embodiment of the present invention eight, as shown in Figure 6, this flow process comprises:

Step 601, HLR receive the route requests that caller MSC sends according to calling subscriber's voice request, resident MSC (hereinafter to be referred as 2G MSC) request route information corresponding to 2G network to called UE; Wherein, above-mentioned caller MSC is MSC corresponding to calling subscriber.

Step 602, HLR obtain routing iinformation corresponding to called UE from 2G MSC, and the routing iinformation obtained is sent to caller MSC, make caller MSC preferentially to communicate by the 2G network.

Wherein, 2G and 3G core net can separately be disposed, and also can unify deployment; Below by the specific embodiment shown in Fig. 7 A-Fig. 7 C, the speech business flow process shown in Fig. 6 is described in detail.

Embodiment nine

The flow chart of the speech called flow process that Fig. 7 A provides for the embodiment of the present invention nine, the application scenarios of the present embodiment is: 2G and 3G core net are separately disposed.In the present embodiment, due to 2G and the separately deployment of 3G core net, the MSC that 2G is corresponding with 3G network is different; So, by HLR choice for use 2G network, after HLR gets the MSC2 that 2G is corresponding, directly from MSC2, just can get the routing iinformation of UE, the routing iinformation that this routing iinformation is 2G; HLR sends to caller MSC by this routing iinformation; HLR sends to caller MSC by the routing iinformation got, and then caller MSC is routed to MSC2 according to this routing iinformation, and the MSC2 distributing paging makes speech business pass through the 2G network carrying.Concrete, as shown in Figure 7 A, this flow process can comprise:

Step 701A, caller MSC receive the calling request, to the HLR request route information.

When the calling subscriber wants to carry out talk business with the called subscriber, first to caller MSC, send request, after caller MSC receives request, to the HLR request route information.

Step 702A, HLR inquiring user positional information (primary importance information), suppose that called subscriber's 2G network is corresponding to MSC2,3G network is corresponding to MSC4, HLR is according to the business network selection strategy of configuration, preferentially to 2G MSC (MSC2), obtain routing iinformation, the routing iinformation here means with roaming number, therefore, to MSC2, obtains routing iinformation by asking MSC2 to provide called subscriber's roaming number to realize.

The prerequisite that above-mentioned HLR preferentially obtains routing iinformation to 2G MSC is to preserve positional information corresponding to the 2G network in HLR in customer position information (as user A:2G network: MSC2); If while not having, to 3G MSC, obtain routing iinformation, prerequisite is to preserve the positional information corresponding to 3G network in HLR in customer position information.

Step 703A, MSC2 inquiry called subscriber's positional information, and corresponding roaming number returns to this HLR by the called subscriber.

Due to 2G and the separately deployment of 3G core net, so in MSC2, called subscriber's positional information (second place information) only has one.

Step 704A, HLR return to caller MSC by called subscriber's routing iinformation.

After HLR receives called subscriber's roaming number, the routing iinformation that this roaming number is meaned sends to caller MSC.

Step 705A, caller MSC, according to this routing iinformation distributing paging, carry out call proceeding.

Caller MSC is routed to MSC2 according to this routing iinformation, the MSC2 distributing paging.

In the present embodiment, if by 2G MSC paging failure, can be when judging terminal and possess the ability of resident two nets simultaneously, again obtain the 3G routing iinformation to HLR, it is similar to the flow process that HLR obtains the 2G routing iinformation that HLR obtains the flow process of 3G routing iinformation, but need to identify network type, then HLR sends to the 3G routing iinformation obtained the MSC of 2G, MSC by 2G is called to 3G MSC according to the 3G routing iinformation, 3G MSC calling called subscriber from 3G network, and set up and call out in 3G network.

In addition, if HLR is to 3G MSC query routing information in step 702A, follow-up 3GMSC processing mode and above-mentioned 2G MSC processing mode are similar, are not described in detail in this, and last caller MSC is by 3G MSC distributing paging.

Embodiment ten

The flow chart of the speech called flow process that Fig. 7 B provides for the embodiment of the present invention ten, the application scenarios of the present embodiment is: 2G and the unification of 3G core net are disposed, and carry out choice for use 2G network by MSC, at MSC configuration network selection strategy; In the present embodiment, HLR sends to MSC2 the roaming number request that provides, MSC2 returns to roaming number information to HLR, by this roaming number information, corresponding routing iinformation sends to caller MSC to HLR, then caller MSC is routed to MSC2 according to this routing iinformation by audio call, and MSC2 selects 2G network distributing paging again; Concrete, as shown in Figure 7 B, this flow process can comprise:

Step 701B, caller MSC receive the calling request, to the HLR request route information.

Step 702B, HLR inquiring user positional information, called subscriber's 2G position and 3G position be corresponding same MSC (for example MSC1) all, and HLR sends to MSC1 the roaming number request that provides.

Step 703B, MSC1 distributing user roaming number also return to HLR.

Step 704B, HLR return to caller MSC by called subscriber's routing iinformation (meaning with roaming number).

Step 705B, caller MSC are routed to corresponding MSC1 according to this routing iinformation, carry out call proceeding.

Step 706B, MSC1 according to the configuration the network selection strategy at the 2G network to the UE distributing paging.

Same, in the present embodiment, if by 2G routing iinformation paging failure, can, after the judgement terminal possesses the ability of simultaneously resident two nets, again to HLR, obtain the 3G routing iinformation, and set up and call out in 3G network.

Embodiment 11

The flow chart of the speech called flow process that Fig. 7 C provides for the embodiment of the present invention 11, the application scenarios of the present embodiment is: 2G and the unification of 3G core net are disposed, and by HLR choice for use 2G network, at HLR configuration network selection strategy; In the present embodiment, MSC needs to distribute 2G or 3G roaming number according to network identity, and is identified at corresponding network identity distributing paging according to the heterogeneous networks of roaming number; HLR to MSC2 send carry the 2G network identity the roaming number request is provided, then MSC2 just returns to HLR the information of the roaming number for the 2G network that UE is corresponding, by this roaming number information, corresponding routing iinformation sends to caller MSC to HLR; Then caller MSC is routed to MSC2 according to this routing iinformation, and MSC2, according to 2G roaming number distributing paging, makes speech business pass through the 2G network carrying; Concrete, as shown in Fig. 7 C, this flow process comprises:

Step 701C, caller MSC receive the calling request, to the HLR request route information.

Step 702C, HLR inquiring user positional information, called subscriber's 2G position and 3G position be corresponding same MSC (for example MSC1) all, HLR is according to the business network selection strategy of configuration, preferentially to MSC1 send carry the 2G network identity the roaming number request is provided, wherein, the 2G network identity carried is for notifying MSC1 to return to the 2G roaming number.If in the time of need to returning to the 3G roaming number, carry the 3G network sign.

The 2G sign that step 703C, MSC1 send according to HLR the roaming number request is provided, distribute the 2G roaming number, return to HLR.

Corresponding 2G routing iinformation returns to caller MSC by called subscriber's 2G roaming number for step 704C, HLR.

Step 705C, caller MSC send call connection to the MSC1 that returns to routing iinformation, make MSC1 make a call to described terminal according to positional information and the routing iinformation preserved.

Here routing iinformation means with roaming number, and the roaming number that MSC1 returns specifically can be divided into again 2G roaming number and 3G roaming number.The positional information (second place information) of the routing iinformation that MSC1 can mean by 2G roaming number or 3G roaming number and preservation selects 2G network or 3G network to carry out speech business.

Same, in the present embodiment, if by 2G routing iinformation paging failure, can, after the judgement terminal possesses the ability of simultaneously resident two nets, in 3G network, set up and call out.

Embodiment 12

The flow chart of the reception short message service that Fig. 8 provides for the embodiment of the present invention 12, as shown in Figure 8, the flow process of this reception short message service comprises:

Step 801, HLR receive the route requests of SMC according to calling subscriber's short message request transmission, and the MSC2 for the 2G network corresponding to inquiry UE.SMC is the SMC of the request of sending SMS message to the called subscriber.

Operation flow when the present embodiment is UE reception short message, and UE resides in 2G and 3G network in the CS territory simultaneously.For short message service, network side preferentially selects the 2G network to communicate according to the network selection strategy of configuration.

The calling subscriber sends SMS message, and SMC sends and gets the short message route requests to HLR according to this short message request, and this is got in the short message route requests and carries the user ID as called UE; After HLR receives this and gets the short message route requests, inquire about the MSC for the 2G network that this UE is corresponding (being above-mentioned MSC2).

Shown in earlier figures 4A and Fig. 4 B, 2G CS domain core net and 3G CS domain core net can separately be disposed, and also can unify deployment.When 2G CS domain core net and 3G CS domain core net are separately disposed, for the MSC of 2G network, from the MSC for 3G network, be different; When the unification of 2G CS domain core net and 3G CS domain core net is disposed, for the MSC of 2G internet and 3G network, be same.

Step 802, HLR send to SMC by the sign of MSC2, to communicate by the 2G network.

After HLR inquires this MSC2, the sign of MSC2 is sent to SMC.

Below by Fig. 9 A-Fig. 9 C, the reception short message service flow process shown in Fig. 8 is described in detail.

Embodiment 13

The flow chart of the reception short message service flow process that Fig. 9 A provides for the embodiment of the present invention 13, the application scenarios of the present embodiment is: 2G and 3G core net are separately disposed, and the MSC that 2G is corresponding with 3G network is different; So, by HLR choice for use 2G network, after HLR gets the MSC2 that 2G is corresponding, directly the sign of this MSC2 is sent to SMC, then SMC just can be by short-message sending under MSC2; Concrete, as shown in Figure 9 A, this flow process comprises:

After step 901A, SMC receive the short message of calling subscriber's transmission, SMC is to the HLR request route of called subscriber's ownership.

Step 902A, HLR inquiring user positional information, the corresponding MSC2 in called subscriber's 2G position, the corresponding MSC4 in 3G position, HLR, according to the business network selection strategy of configuration, preferentially selects the MSC2 that 2G is corresponding, and the sign of MSC2 is returned to SMC.

Step 903A, SMC send SMS message to MSC2.

UE supports to receive short message from 2G network or 3G network.

Embodiment 14

The flow chart of the reception short message service flow process that Fig. 9 B provides for the embodiment of the present invention 14, in the present embodiment, 2G and the unification of 3G core net are disposed, and carry out choice for use 2G network by MSC, at MSC configuration network selection strategy; In the present embodiment, HLR returns to the sign of MSC2 to SMC, and SMC is to short-message sending under MSC2, and MSC2 receives after short message according to the network selection strategy of configuration, selects the 2G network to issue this short message; Concrete, as shown in Fig. 9 B, this flow process comprises:

After step 901B, SMC receive the short message of calling subscriber's transmission, SMC is to the HLR request route of called subscriber's ownership.

Step 902B, HLR inquiring user positional information, called subscriber's 2G position and 3G position be corresponding same MSC (for example MSC1) all, and HLR sends to SMC by the sign of MSC1.

Step 903B, SMC send SMS message to MSC1, after MSC1 receives short message, and the inquiring user positional information, this user exists 2G positional information and 3G positional information simultaneously, and MSC1 is according to the business network selection strategy of configuration, preferentially short-message sending from the 2G network.

UE supports to receive short message from 2G network or 3G network.

Embodiment 15

The flow chart of the reception short message service flow process that Fig. 9 C provides for the embodiment of the present invention 15, in the present embodiment, 2G and the unification of 3G core net are disposed, and by HLR choice for use 2G network, at HLR configuration network selection strategy; In the present embodiment, when HLR returns to the sign of MSC2 to SMC, also to SMC, send the 2G network identity, make SMC to carrying the 2G network identity during short-message sending under MSC2, then MSC2 is according to short-message sending under this 2G network identity choice for use 2G network; Concrete, as shown in Fig. 9 C, this flow process comprises:

After step 901C, SMC receive the short message of calling subscriber's transmission, SMC is to the HLR request route of called subscriber's ownership.

Step 902C, HLR inquiring user positional information, called subscriber's 2G position and 3G position be corresponding same MSC (for example MSC1) all, and HLR, according to the business network selection strategy of configuration, sends to SMC by the sign of MSC1 and 2G network identity.

Step 903C, SMC send the short message that carries the 2G network identity to MSC1.

After step 904C, MSC1 receive this short message, according to carrying the 2G network identity in message, inquiring user is in the positional information of 2G network, short-message sending from the 2G network.

Embodiment 16

Based on above-described embodiment, the embodiment of the present invention provides a kind of terminal, the schematic diagram of the terminal that Figure 10 provides for the embodiment of the present invention 16; As shown in figure 10, this terminal is single SIM card terminal, contains user ID in SIM card, and this terminal specifically comprises:

2G processing module 1001, for send the 2G network site update request of carrying described user ID to network side, after making described network side receive described 2G network site update request, completing circuit exchange CS territory position update flow together with described terminal, thus make the CS territory of described terminal reside in the 2G network;

3G processing module 1002, for send the 3G network position updating request of carrying described user ID to network side, after making described network side receive described 3G network position updating request, completing circuit exchange CS territory position update flow together with described terminal, thus make the CS territory of described terminal reside in 3G network;

Select module 1003, for when initiating CS territory service request, preferentially by described 2G processing module, select described 2G network to carry out described CS territory business, when described 2G network does not meet described CS territory business need, by described 3G processing module, select described 3G network to carry out described CS territory business.

Above-mentioned 2G processing module is mainly used to process with the relevant business of 2G network, and the 3G processing module is mainly used to process with the relevant business of 3G network, and two modules are module relatively independent on function, each self-operating 2G protocol stack and 3G protocol stack.When realizing with hardware, two modules can realize (two independently functional modules are arranged, and for example two processing modules based on hardware, seal into a process chip) by same process chip, or with a hardware handles chip, realize respectively.

In the present embodiment, the workflow of modules and operation principle can, referring to the specific descriptions in above-mentioned each embodiment of the method, not repeat them here.

The embodiment of the present invention, UE resides in 2G internet and 3G network simultaneously, and preferentially select the 2G network to communicate for CS territory business, because the covering of 2G network is generally good than 3G network, therefore, the preferential 2G of selection network can improve take the communication quality that speech business is main CS territory business, has avoided the frequent gravity treatment between 2G internet and 3G network, has improved communication quality; And when the 2G network signal does not meet the demands, can also use 3G network as backup, while selecting 3G network to carry out CS territory business, UE has resided in 3G network, therefore, does not need more new technological process of launch position, can not increase the connection time delay.

Embodiment 17

The structural representation of the MSC that Figure 11 provides for the embodiment of the present invention 17, as shown in figure 11, described MSC is simultaneously for the 2G/3G MSC of 2G internet and 3G network, and described MSC comprises: receiver module 1101, sending module 1103, route are returned to module 1105 and are called out and select module 1107;

2G network site update request and 3G network position updating request that receiver module 1101 sends for receiving terminal; Terminal is single SIM card, contains user ID in SIM card, and 2G network site update request and 3G network position updating request carry identical user ID; And the circuit switching (CS) territory of terminal is resident to 2G internet and 3G network, and preserve the positional information of resident 2G network and the positional information of 3G network;

Sending module 1103 is for sending first network position updating request and second network position updating request to HLR, the first network position updating request carries described user ID, 2G network identity and 2G/3G MSC sign, and the second network position updating request carries user ID, 3G network sign and 2G/3G MSC sign;

Receiver module 1101 also for, receive HLR and receive the insertion user data notice sent after first network position updating request and second network position updating request, place network of network type when in this notice, carried terminal sends position updating request, notified rear preservation second place information, described second place information comprises the location area information of place network when described network type and terminal send position updating request;

Receiver module 1101 also for, receive the request of obtaining routing iinformation that HLR sends, wherein, HLR is the request of obtaining routing iinformation that sends when receiving caller MSC query routing information request, caller MSC is when the CS territory service request that receives that the calling subscriber sends, and sends the request of query routing information to HLR;

Route is returned to module 1105 for the request according to HLR, to HLR, returns to routing iinformation, so that HLR returns to the routing iinformation of terminal to caller MSC;

Call out the call connection of selecting module 1107 to send according to routing iinformation for receiving caller MSC, and to terminal, make a call by the 2G network according to the second place information priority of preserving, when the 2G network does not meet CS territory business need, cross 3G according to the second place information exchange of preserving and make a call to terminal.

In the present embodiment, the workflow of modules and operation principle, referring to the specific descriptions in above-mentioned each embodiment of the method, do not repeat them here.When particular hardware realizes, can realize by the hardware structure based on existing MSC, for example, can be in chip more fresh code realize corresponding functional module.

The MSC that the embodiment of the present invention provides, can, with UE together with other network equipments, make UE reside in 2G internet and 3G network simultaneously, and preferentially select the 2G network to communicate for CS territory business, avoid the frequent gravity treatment between 2G internet and 3G network, improved communication quality; And, when the 2G network signal does not meet the demands, can also use 3G network as backup.

Embodiment 18

The structural representation of the HLR that Figure 12 provides for the embodiment of the present invention 18, as shown in figure 12, described HLR comprises: position is upgraded receiver module 1201, is preserved module 1203 and route acquisition module 1205.

First network position updating request and the second network position updating request that receiver module 1201 sends respectively for receiving 2G moving exchanging center MSC and 3G MSC upgraded in position, described first network position updating request carries user ID, 2G network identity and 2G MSC sign, and described second network position updating request carries user ID, 3G network sign and 3G MSC sign.

Wherein, the type of place network when described 2G network identity and described 3G network sign send position updating request for identifying terminal corresponding to described user ID, described 2G MSC sign and described 3GMSC sign are for identifying the MSC of receiving position update request.

Preserve module 1203 and preserve primary importance information for the described first network position updating request according to receiving and described second network position updating request, the sign of the MSC of place network of network type and receiving position update request when described primary importance information comprises described terminal transmission position updating request; And notify described 2G MSC and described 3G MSC to insert user data, and making the notified rear preservation second place information of described 2G MSC and described 3G MSC, described second place information comprises the location area information of place network when terminal sends position updating request; If have other MSC to preserve the second place information of haveing been friends in the past, notify these other MSC to delete old second place information.Primary importance information in various embodiments of the present invention can comprise the sign of a terminal use corresponding MSC in 2G internet and 3G network difference simultaneously.

Route acquisition module 1205 is for the request of the routing iinformation of the described terminal of inquiry that receives caller MSC and send, and obtains the routing iinformation for the 2G network according to the described primary importance information of preserving to described 2G MSC; Do not exist in described primary importance information while corresponding to the positional information of 2G network or 2G network, not meeting described CS territory business need, to 3G MSC, obtain the routing iinformation for 3G network; Caller MSC is when the CS territory service request that receives that the calling subscriber sends, and sends the request of query routing information to described HLR.

Route acquisition module 1205 also for, return to the routing iinformation of described terminal to described caller MSC.

Wherein, in the HLR provided in the present embodiment, preserve the sign of the MSC that the sign of terminal corresponding MSC at the 2G network and 3G network are corresponding simultaneously, make HLR can preferably select the 2G network to carry out CS territory business.

2G MSC in the present embodiment and 3G MSC can be physical NEs (MSC), can be also a plurality of physical NEs.For example, 2G MSC and 3G MSC are completed by two physics MSC respectively, or 2G MSC and 3G MSC complete by a physics MSC, remember that this physics MSC is 2G/3G MSC.In like manner, caller MSC also can be used same physics MSC with 2G MSC or 3G MSC or 2G/3G MSC.

It should be noted that, as 2G MSC and 3G MSC by a physics MSC (2G/3G MSC) while completing, when the CS territory service request that receives that caller MSC sends, the route acquisition module 1205 in HLR can preferentially be obtained the routing iinformation for the 2G network to 2G/3G MSC; Perhaps, route acquisition module 1205 can be replaced by another route acquisition modules A, when this route acquisition modules A is obtained routing iinformation to 2G/3G MSC, not limiting is the routing iinformation for the 2G network, and just, by 2G/3G MSC, corresponding routing iinformation sends to caller MSC, when caller MSC calls out 2G/3GMSC, by preferential selection of 2G/3G MSC, by the 2G network, issue CS territory business.

In the present embodiment, the workflow of modules and operation principle, referring to the specific descriptions in above-mentioned each embodiment of the method, do not repeat them here.

The HLR that the embodiment of the present invention provides, can, with UE together with other network equipments, make UE reside in 2G internet and 3G network simultaneously, and preferentially select the 2G network to communicate for CS territory business, avoid the frequent gravity treatment between 2G internet and 3G network, improved communication quality; And, when the 2G network signal does not meet the demands, can also use 3G network as backup.

Embodiment 19

The embodiment of the present invention provides a kind of communication system, comprising:

Described HLR is used for, preserve primary importance information according to the described first network position updating request received and described second network position updating request, the sign of the MSC of place network of network type and receiving position update request when described primary importance information comprises described terminal transmission position updating request; And notify described 2G MSC and described 3G MSC to insert user data, carry described network type during notice, make the notified rear preservation second place information of described 2G MSC and described 3G MSC, described second place information comprises the location area information of place network when described network type and terminal send position updating request; If have other MSC to preserve the second place information of haveing been friends in the past, notify other MSC to delete old second place information;

Described HLR also for, obtain routing iinformation according to the described primary importance information priority of preserving to described 2G MSC; While not having the positional information corresponding to the 2G network in described primary importance information, to 3G MSC, obtain routing iinformation;

Embodiment 20

Embodiment 21

In communication system in above-mentioned three embodiment, the concrete mutual beneficial effect that reaches this communication system of each network element also can, referring to the explanation in embodiment of the method, be not described in detail in this.

Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: its technical scheme that still can put down in writing aforementioned each embodiment is modified, or part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims

1. a communication system, is characterized in that, comprising:

Described HLR is used for, preserve primary importance information according to the described first network position updating request received and described second network position updating request, the sign of the MSC of place network of network type and receiving position update request when described primary importance information comprises described terminal transmission position updating request; And notify described 2G MSC and described 3G MSC to insert user data, make the notified rear preservation second place information of described 2G MSC and described 3G MSC, described second place information comprises the location area information of place network when terminal sends position updating request; If have other MSC to preserve the second place information of haveing been friends in the past, notify other MSC to delete old second place information;

2. a communication system, is characterized in that, comprising:

3. a communication system, is characterized in that, comprising:

4. a moving exchanging center MSC, is characterized in that, described MSC is simultaneously for the 2G/3G MSC of 2G internet and 3G network, and described MSC comprises: receiver module, sending module, route are returned to module and are called out and select module;

Described receiver module is used for, 2G network site update request and 3G network position updating request that receiving terminal sends; Terminal is alone family identification module SIM card, contains user ID in SIM card, and 2G network site update request and 3G network position updating request carry identical user ID; And the circuit switching (CS) territory of terminal is resident to 2G internet and 3G network, and preserve the positional information of resident 2G network and the positional information of 3G network;

Described sending module is used for, send first network position updating request and second network position updating request to Home Location Register HLR, described first network position updating request carries described user ID, 2G network identity and 2G/3G MSC sign, and described second network position updating request carries user ID, 3G network sign and 2G/3G MSC sign;

By sending described first network position updating request and described second network position updating request, make HLR upgrade according to the described first network position updating request received and described second network position the primary importance information of preserving, the sign of the MSC of place network of network type and receiving position update request when described primary importance information comprises described terminal transmission position updating request;

Described receiver module also for, receive HLR and receive the insertion user data notice sent after first network position updating request and second network position updating request, place network of network type when in described insertion user data notice, carried terminal sends position updating request, notified rear preservation second place information, described second place information comprises the location area information of place network when described network type and terminal send position updating request;

Call out and select module to be used for, receive the call connection that caller MSC sends according to routing iinformation, and to terminal, make a call by the 2G network according to the second place information priority of preserving, while not existing 2G network location information or described 2G network not to meet CS territory business need in described second place information, cross 3G network according to the second place information exchange of preserving and make a call to terminal.

5. a Home Location Register HLR, is characterized in that, comprising: position is upgraded receiver module, is preserved module and route acquisition module;

Described route acquisition module is used for, the request of the routing iinformation of the described terminal of inquiry that reception caller MSC sends, and obtain routing iinformation according to the described primary importance information of preserving to described 2G MSC; Do not exist in described primary importance information while corresponding to the positional information of 2G network or 2G network, not meeting CS territory business need, to 3G MSC, obtain routing iinformation; Caller MSC is when the CS territory service request that receives that the calling subscriber sends, and sends the request of query routing information to described HLR;