CN103781119B - MGW selection method and device - Google Patents

Abstract

The invention discloses a MGW selection method and device, and relates to the technical field of communication. The method and device are used to improve the network resource utilization rate. The method comprises the following steps: a first mobile center switching server MSC Server is used to acquire common media gateway MGW candidate list collection of the calling party and the called party, wherein the common MGW candidate list collection comprises identifiers and loads of each candidate MGW for providing services for both of the calling party and the called party; and if the common MGW candidate list collection includes MGWs having a load which is less than a first threshold value, then one of the MGWs having a load which is less than the first threshold value is selected as the common MGW for serving the calling party and the called party.

Description

A method and device for selecting MGW

technical field

The present invention relates to the field of communication technology, in particular to a method and device for selecting an MGW.

Background technique

With the development of mobile communication networks, in order to ensure efficient, safe and reliable services, the network architecture of the mobile core network has been continuously improved, resulting in many intermediate states in the current network architecture, for example: 2G and 3G wireless networks use shared core network nodes , Mobile Switching Center server (MSC server for short) and GPRS service support node (Serving GPRS Support Node, SGSN for short) present a pool structure, and the media gateway (MGW for short) and MSC server present a multi-pair One's corresponding relationship, etc. Therefore, under the current network architecture and different service conditions, network resources need to be scheduled reasonably and effectively, among which the optimal selection of the MGW is an important issue.

At present, the MGW optimization scheme in the intra-office call scenario is to achieve MGW optimization by comparing and selecting the shared MGW after obtaining the associated MGW list of the calling party and the called party; the MGW optimization scheme in the inter-office call scenario is mainly through the Static configuration data on the server, or the calling side selects the MGW first, and the called side selects the MGW later, or the called side selects the MGW first, and the calling side selects the MGW later, so as to realize the selection of the MGW.

However, in some scenarios in the existing MGW optimization scheme, even if there is a shared MGW on the calling and called sides, the selection of the MGW may not be realized, which reduces the utilization rate of network resources.

Contents of the invention

Embodiments of the present invention provide a method and device for selecting an MGW, so as to improve the utilization rate of network resources.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a method for selecting an MGW, including:

The first mobile center switching server MSC Server obtains the common media gateway MGW candidate list set of the calling user and the called user; the common MGW candidate list set includes: providing services for both the calling user and the called user The identification and load of each candidate MGW;

If the common MGW candidate list set contains an MGW with a load less than the first threshold, select one of the MGWs with the load less than the first threshold as the MGW that serves the calling user and the called user .

In the first possible implementation manner of the first aspect, if the call type between the calling user and the called user is an intra-office call, the first MSC Server obtains the common The MGW candidate list set includes:

Obtain the MGW candidate list set P of the calling access side according to the location information of the calling user; said P includes the identification and load of each candidate MGW of the calling access side;

Acquire the MGW candidate list set Q of the called access side according to the location information of the called user; the Q includes the identification and load of each candidate MGW of the called access side;

The intersection R of the P and Q is obtained, and the intersection R is used as a set of MGW candidate lists common to the calling user and the called user.

In the first aspect or the first possible implementation of the first aspect, the second possible implementation of the first aspect is also provided, if the call type between the calling user and the called user is For an intra-office call, the method further includes: if the common MGW candidate list set does not include an MGW with a load less than the first threshold,

Obtaining MGWs whose load is less than the second threshold in the MGW candidate list set P on the calling access side, and MGWs whose load is less than the third threshold in the MGW candidate list set Q on the called access side;

Selecting one of the MGWs whose load is less than the second threshold as the MGW serving the calling user, and one of the MGWs whose load is less than a third threshold as the MGW serving the called user.

In the third possible implementation manner of the first aspect, if the call type between the calling user and the called user is an inter-office call, the first MSC Server obtains the calling user and the called user The common set of MGW candidate lists includes:

Receive the MGW candidate list set M sent by the second MSC Server and include the load of the calling user side less than the second threshold; the M is the MGW on the calling access side obtained by the second MSC Server according to the location information of the calling user The candidate list set A, and the MGW candidate list set B obtained on the outgoing relay side according to the configuration information of the outgoing relay side, and the intersection S of the A and B are obtained. If the intersection of the A and B is an empty set, S is equal to A or B, obtaining the MGW candidate list set M whose load is less than the second threshold from the intersection S, where the M contains the identification and load of each candidate MGW on the calling user side;

The MGW candidate list set C of the called access side obtained according to the location information of the called user, and the MGW candidate list set D of the incoming relay side obtained according to the configuration information of the incoming relay side, obtain the C and D The intersection N of C, if the intersection of C and D is an empty set, N is equal to D, and said N includes the identification and load of each candidate MGW on the called user side;

The intersection R of the M and N is obtained, and the intersection R is used as a set of MGW candidate lists common to the calling user and the called user.

In the first aspect or the third possible implementation of the first aspect, a fourth possible implementation of the first aspect is also provided, if the call type between the calling user and the called user is For an inter-office call, the method further includes: if the common MGW candidate list set does not include an MGW with a load less than the first threshold,

Obtain an MGW whose load is less than a third threshold in the MGW candidate list set N on the called access side, and select one of the MGWs whose load is less than the third threshold as an MGW serving the called user;

Send a message containing the MGW selected by the called user to the second MSC Server, so that the second MSC Server obtains the MGW whose load is less than the second threshold in the MGW candidate list set M of the calling access side, and selects the MGW whose load is less than the second threshold. One of the MGWs with the second threshold serves as the MGW serving the calling user.

In the first aspect or any of the first four possible implementations of the first aspect, a fifth possible implementation of the first aspect is also provided, the load of each MGW is the number of available idle circuits of each MGW and The ratio between the total number of circuits of each MGW; or, the ratio between the current number of sessions on each MGW and the maximum number of sessions that each MGW can provide.

In a second aspect, an embodiment of the present invention provides a method for selecting an MGW, including:

The first MSC Server obtains the MGW candidate list set A of the calling access side according to the location information of the calling user, and obtains the MGW candidate list set B of the outgoing trunk side according to the configuration information of the outgoing trunk side, and obtains the A and B The intersection M of; Said M contains the identification and the load of each candidate MGW;

Obtaining the MGW candidate list set P whose load is less than the first threshold in the M; the P is the MGW candidate list set on the calling user side, including the identifier and load of each candidate MGW;

Sending the message containing the P to the second MSC Server, so that the second MSC Server selects the MGW that serves the calling user and the called user, or selects the MGW that serves the called user;

If the second MSC Server only selects the MGW on the side of the called user, the first MSC Server receives a message sent by the second MSC Server that includes the MGW serving the called user;

Acquiring MGWs whose loads are less than the second threshold in the MGW candidate list set P on the calling access side, and selecting one of the MGWs whose loads are less than the second threshold as the MGW serving the calling user.

In the first possible implementation of the second aspect, the load of each MGW is the ratio between the number of available idle circuits of each MGW and the total number of circuits of each MGW; or, it is the current session on each MGW The ratio between the number and the maximum number of sessions that each MGW can provide.

In a third aspect, the embodiment of the present invention provides a mobile switching server, including:

The first acquiring module is configured to acquire a media gateway MGW candidate list set common to the calling user and the called user; the common MGW candidate list set includes: services provided for both the calling user and the called user Identification and load of each candidate MGW;

A selection module, configured to select one of the MGWs with a load smaller than the first threshold as the serving station if the common MGW candidate list set obtained by the first acquisition module includes an MGW with a load smaller than the first threshold. The MGW common to the calling user and the called user.

In a first possible implementation manner of the third aspect, if the call type between the calling user and the called user is an intra-office call, the first obtaining module includes:

The first obtaining unit is configured to obtain the MGW candidate list set P of the calling access side according to the location information of the calling user; the P includes the identification and load of each candidate MGW of the calling access side;

The second obtaining unit is used to obtain the MGW candidate list set Q of the called access side according to the location information of the called user; the Q includes the identification and load of each candidate MGW of the called access side;

The third acquisition unit is configured to acquire the intersection R of the P obtained by the first acquisition unit and the Q obtained by the second acquisition unit, and use the intersection R as the common value of the calling user and the called user MGW candidate list set.

In the third aspect or the first possible implementation of the third aspect, a second possible implementation of the third aspect is also provided, if the call type between the calling user and the called user is For an intra-office call, when the common MGW candidate list set does not include an MGW with a load less than the first threshold, the mobile switching server further includes:

The second acquisition module is configured to acquire MGWs whose load is less than the second threshold in the MGW candidate list set P of the calling access side, and MGWs whose load is less than the third threshold in the MGW candidate list set Q of the called access side;

The selection module is further configured to select one of the MGWs whose load obtained by the second acquisition module is less than a second threshold as the calling user's MGW, and select an MGW whose load obtained by the second acquisition module is less than a third threshold One of them is the MGW of the called user.

In a third possible implementation manner of the third aspect, if the call type between the calling user and the called user is an inter-office call, the mobile switching server further includes: a receiving module, a third acquiring module;

The receiving module is configured to receive the MGW candidate list set M sent by the second MSC Server and containing the load of the calling user side less than the second threshold; the M is obtained by the second MSC Server according to the location information of the calling user The MGW candidate list set A of the calling access side, and the MGW candidate list set B of the outgoing relay side obtained according to the configuration information of the outgoing relay side, to obtain the intersection S of the A and B, if the intersection of the A and B It is an empty set, S is equal to A or B, and the MGW candidate list set M whose load is less than the second threshold in the intersection S is obtained, and the M includes the identification and load of each candidate MGW on the calling user side;

The third acquisition module is configured to acquire the MGW candidate list set C of the called access side obtained according to the location information of the called user, and the MGW candidate list of the incoming relay side obtained according to the configuration information of the incoming relay side Set D to obtain the intersection N of the C and D, if the intersection of C and D is an empty set, N is equal to D, and the N includes the identification and load of each candidate MGW on the called user side;

The first obtaining module is further configured to obtain an intersection R of M obtained by the receiving module and N obtained by the third obtaining module, and use the intersection R as the common value of the calling user and the called user. MGW candidate list set.

In the third aspect or the third possible implementation of the third aspect, a fourth possible implementation of the third aspect is also provided, if the call type between the calling user and the called user is For an inter-office call, when the common MGW candidate list set does not include an MGW with a load less than the first threshold, the mobile switching server further includes:

The fourth acquisition module is configured to acquire the MGWs whose load is less than the third threshold in the MGW candidate list set N on the called access side, and select one of the MGWs whose load is less than the third threshold as the one serving the called user MGW;

The sending module is configured to send the message containing the MGW selected by the called user to the second MSC Server, so that the second MSC Server obtains the MGW whose load is less than the second threshold in the MGW candidate list set M of the calling access side and selecting one of the MGWs whose load is smaller than a second threshold as the MGW serving the calling user.

In the third aspect or any of the first four possible implementations of the third aspect, a fifth possible implementation of the third aspect is also provided, the load of each MGW is the number of available idle circuits of each MGW and The ratio between the total number of circuits of each MGW; or, the ratio between the current number of sessions on each MGW and the maximum number of sessions that each MGW can provide.

In a fourth aspect, the embodiment of the present invention provides a mobile switching server, including:

The first obtaining module is used to obtain the MGW candidate list set A of the calling access side according to the location information of the calling user, and obtain the MGW candidate list set B of the outgoing relay side according to the configuration information of the outgoing relay side, and obtain the The intersection M of A and B; said M contains the identification and load of each candidate MGW;

The second acquisition module is used to acquire the MGW candidate list set P whose load is less than the second threshold in M obtained by the first acquisition module; the P is the MGW candidate list set on the calling user side, including each candidate MGW identification and load;

a sending module, configured to send a message containing the set P obtained by the second obtaining module to the first MSC Server, so that the first MSC Server selects an MGW that jointly serves the calling user and the called user, Or select the MGW serving the called user;

A receiving module, configured to receive a message sent by the first MSC Server that includes the MGW serving the called user if the first MSC Server only selects the MGW on the called user side;

A third acquisition module, configured to acquire an MGW with a load less than the second threshold in the MGW candidate list set P at the calling access side, and select one of the MGWs with the load less than the second threshold as the MGW serving the calling user .

In the first possible implementation manner of the fourth aspect, the load of each MGW is the ratio between the number of available idle circuits of each MGW and the total number of circuits of each MGW; or, it is the current session on each MGW The ratio between the number and the maximum number of sessions that each MGW can provide.

According to a method and device for selecting an MGW provided by an embodiment of the present invention, the first mobile center switching server MSCServer acquires a media gateway MGW candidate list set common to both the calling user and the called user; if the common MGW candidate list set includes If there is an MGW with a load less than the first threshold, select one of the MGWs with the load less than the first threshold as the common MGW serving the calling user and the called user; further, if the common MGW candidate If the list set does not contain MGWs with loads smaller than the first threshold, the MGWs of the calling user and the called user are selected respectively, so as to improve the utilization rate of network resources.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of a traditional networking scenario provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of another traditional networking scenario provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a scenario of an MSC Pool provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of another MSC Pool scene provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of another MSC Pool scene provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of another MSC Pool scenario provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a method for selecting an MGW provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of another method for selecting an MGW provided by an embodiment of the present invention;

FIG. 9 is a schematic flow chart of selecting an MGW provided by an embodiment of the present invention;

FIG. 10 is a schematic diagram of a scenario of an MSC Pool for an inter-office call provided by an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a mobile switching server provided by an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another mobile switching server provided by an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of another mobile switching server provided by an embodiment of the present invention;

FIG. 14 is a schematic diagram of the physical structure of a mobile switching server provided by an embodiment of the present invention;

FIG. 15 is a schematic diagram of the physical structure of another mobile switching server provided by an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In order to facilitate the understanding of the embodiments of the present invention, the relevant networking scenarios in the description of the embodiments of the present invention are firstly introduced here.

1. Traditional networking: MGW can only be controlled by one MSC Server. The base station controller (Base Station Controller, referred to as BSC) or wireless network controller (Wireless Access Point Controller, referred to as RNC) is uplinked to the MGW, and users pass BSC or RNC Access to the core network.

Scenario A: As shown in Figure 1, user A and user B are both registered on MSC Server1, user A accesses the core network through BSC1 or RNC1, user B accesses the core network through BSC2 or RNC2, BSC1/RNC1, BSC2/RNC2 Uplink to MGW1, BSC2/RNC2 uplink to MGW2.

Scenario B: As shown in Figure 2, both user A and user B are registered on MSC Server1, user A accesses the core network through BSC1 or RNC1, user B accesses the core network through BSC2 or RNC2, BSC1/RNC1, BSC2/RNC2 Uplink to MGW1, BSC1/RNC1, BSC2/RNC2 uplink to MGW2.

In the traditional networking scenario, the problem of optimal selection of the MGW exists only during intra-office calls, and there is no problem of optimal selection of the MGW during inter-office calls.

2. Mobile switching center pool networking (MSC Pool): the MSC Pool includes at least two MSC Servers, and the MGWs in the MSC Pool can be controlled by all the MSC Servers in the pool.

Scenario C: As shown in Figure 3, the MGW implements the Non Access Stratum Node Selection Function (NNSF for short). Among them, MSC Server1 and MSC Server2 form the MSC Pool, user A and user C are both registered on MSC Server1, user B is registered on MSC Server2, user A accesses the core network through BSC1 or RNC1, user B and user C through BSC2 or RNC2 Access to the core network, BSC1/RNC1, BSC2/RNC2 uplink to MGW1, BSC2/RNC2 uplink to MGW2.

Scenario D: As shown in Figure 4, the MGW implements the NNSF function. Among them, MSC Server1 and MSC Server2 form an MSCPool, user A and user C are both registered on MSC Server1, user B is registered on MSC Server2, user A accesses the core network through BSC1 or RNC1, and user B and user C connect to the core network through BSC2 or RNC2. Enter the core network, BSC1/RNC1, BSC2/RNC2 uplink to MGW1, BSC1/RNC1, BSC2/RNC2 uplink to MGW2.

Scenario E: As shown in Figure 5, the BSC or RNC implements the NNSF function. Among them, MSC Server1 and MSC Server2 form the MSC Pool, user A and user C are both registered on MSC Server1, user B is registered on MSC Server2, user A accesses the core network through BSC1 or RNC1, user B and user C through BSC2 or RNC2 Access to the core network, BSC1/RNC1, BSC2/RNC2 uplink to MGW1, BSC2/RNC2 uplink to MGW2.

Scenario F: As shown in Figure 6, the BSC or RNC implements the NNSF function. Among them, MSC Server1 and MSC Server2 form the MSC Pool, user A and user C are both registered on MSC Server1, user B is registered on MSC Server2, user A accesses the core network through BSC1 or RNC1, user B and user C through BSC2 or RNC2 Access to the core network, BSC1/RNC1, BSC2/RNC2 uplink to MGW1, BSC1/RNC1, BSC2/RNC2 uplink to MGW2.

Among them, the difference between Scenario C and Scenario E is only that in Scenario C, the MGW implements the NNSF function, and in Scenario E, the BSC or RNC implements the NNSF function; the difference between Scenario D and Scenario F is that in Scenario D, the MGW implements the NNSF function , in scenario F, the BSC or RNC implements the NNSF function.

In the MSC Pool scenario, there is a problem of optimizing the selection of the MGW when both intra-office calls and inter-office calls are made.

Wherein, the intra-office call is that the calling user and the called user are registered on the same MSC Server, and the inter-office call is that the calling user and the called user are registered on different MSC Servers respectively. For an inter-office call, the MGWs serving the calling user and the called user may be the same or different.

It should be noted that the above scenarios A to F are only schematic diagrams of the embodiments of the present invention, and any other descriptions of scenarios similar to the above scenarios belong to the protection scope of the embodiments of the present invention.

Embodiment one,

For the above different scenarios, the embodiment of the present invention provides a method for selecting an MGW, so as to realize optimal selection of the MGW. As shown in Figure 7, including:

S101. The first mobile center switching server MSC Server obtains a media gateway MGW candidate list set common to both the calling user and the called user; the common MGW candidate list set includes: The identification and load of each candidate MGW that provides the service.

Wherein, the first MSC Server controls at least one MGW, and the at least one MGW serves at least one user.

If the call type between the calling user and the called user is an intra-office call, the first MSC Server is the MSC Server jointly registered by the calling user and the called user; if the calling user When the type of the call with the called user is an inter-office call, the first MSC Server is the MSC Server on the side of the called user.

Optionally, if the call type between the calling user and the called user is an intra-office call, the first mobile center switching server MSC Server obtains a media gateway MGW candidate list set common to the calling user and the called user include:

Obtain the MGW candidate list set P of the calling access side according to the location information of the calling user; said P includes the identification and load of each candidate MGW of the calling access side;

Acquire the MGW candidate list set Q of the called access side according to the location information of the called user; the Q includes the identification and load of each candidate MGW of the called access side;

The intersection R of the P and Q is obtained, and the intersection R is used as a set of MGW candidate lists common to the calling user and the called user.

Optionally, if the call type between the calling user and the called user is an inter-office call, the common MGW candidate list set obtained by the first MSC Server for the calling user and the called user includes:

Receive the MGW candidate list set M sent by the second MSC Server and include the load of the calling user side less than the second threshold; the M is the MGW on the calling access side obtained by the second MSC Server according to the location information of the calling user The candidate list set A, and the MGW candidate list set B on the outgoing relay side obtained according to the outgoing relay side configuration information, the intersection S of the A and B obtained, if the intersection of the A and B is an empty set, S is equal to A or B, obtaining the MGW candidate list set M whose load is less than the second threshold from the intersection S, the M containing the identity and load of each candidate MGW on the calling user side;

The MGW candidate list set C of the called access side obtained according to the location information of the called user, and the MGW candidate list set D of the incoming relay side obtained according to the configuration information of the incoming relay side, obtain the C and D The intersection N of C, if the intersection of C and D is an empty set, N is equal to D, and said N includes the identification and load of each candidate MGW on the called user side;

The intersection R of the M and N is obtained, and the intersection R is used as a set of MGW candidate lists common to the calling user and the called user.

S102. If the common MGW candidate list set contains MGWs with a load less than the first threshold, select one of the MGWs with the load less than the first threshold to serve the calling user and the called user. The MGW.

Wherein, the first threshold may be set according to actual business conditions and network conditions; the load of each MGW is the ratio between the number of available idle circuits of each MGW and the total number of circuits of each MGW; or, The ratio between the current number of sessions on each MGW and the maximum number of sessions that each MGW can provide.

Preferably, if the common MGW candidate list set contains MGWs with a load less than the first threshold, the load balance of the entire network may be considered, and the MGW with the smallest load among the MGWs with the load less than the first threshold may be selected as the service provider. The MGW common to the calling user and the called user.

Specifically, the A interface circuit carried by TDM is configured on the MSC Server and managed by the MSC Server. The MSC Server can check the load status of the A interface circuit it manages at any time. The MSC Server dynamically compares the number of idle circuits available in each MGW The ratio between the total number of circuits of each MGW is used to select an MGW with a lower load as the common MGW serving the calling user and the called user.

For example, assume that the total number of A interface circuits connected to MGW1 from the BSC is M ₁ , and the number of idle circuits is N ₁ ; the total number of A interface circuits connected from the BSC to MGW2 is M ₂ , and the number of idle circuits is N ₂ , where, The ratios of are all less than the first threshold. when , choose MGW1 as the common MGW serving the calling user and the called user; when , choose MGW2 as the common MGW serving the calling user and the called user; when , one of MGW1 or MGW2 may be randomly selected as the common MGW serving the calling user and the called user.

Specifically, the MGW dynamic load sharing method carried by ATM is based on the ratio between the number of sessions on each MGW and the maximum number of sessions that each MGW can provide, so as to select an MGW with a lower load to serve the calling user and all parties. Describe the common MGW of the called user.

For example, assume that the maximum number of sessions that MGW1 can provide is M1, and the current number of sessions on MGW1 is N ₁ ; the maximum number of sessions that MGW2 can provide is M ₂ , and the current number of sessions on MGW2 is N ₂ , where, The ratios of are all less than the first threshold. when , choose MGW1 as the common MGW serving the calling user and the called user; when , choose MGW2 as the common MGW serving the calling user and the called user; when , one of MGW1 and MGW2 may be randomly selected as the common MGW serving the calling user and the called user.

Further, if the call type between the calling user and the called user is an intra-office call, and the common MGW candidate list set does not include an MGW with a load less than the first threshold, the method further includes :

Obtaining MGWs whose load is less than the second threshold in the MGW candidate list set P on the calling access side, and MGWs whose load is less than the third threshold in the MGW candidate list set Q on the called access side;

One of the MGWs whose load is smaller than the second threshold is selected as the MGW serving the calling user, and one of the MGWs whose load is smaller than the third threshold is selected as the MGW serving the called user.

Further, if the call type between the calling user and the called user is an inter-office call, and the common MGW candidate list set does not include an MGW with a load less than the first threshold, the method further include:

Obtain an MGW whose load is less than a third threshold in the MGW candidate list set N on the called access side, and select one of the MGWs whose load is less than the third threshold as an MGW serving the called user;

Send a message containing the MGW selected by the called user to the second MSC Server, so that the second MSC Server obtains the MGW whose load is less than the second threshold in the MGW candidate list set M of the calling access side, and selects the MGW whose load is less than the second threshold. One of the MGWs with the second threshold is used as the MGW serving the calling user.

Wherein, the above-mentioned load of each MGW is the ratio between the number of available idle circuits of each MGW and the total number of circuits of each MGW; or, it is the number of sessions currently on each MGW and the maximum number of sessions that each MGW can provide ratio between.

Through the above method for selecting the MGW, the optimal selection of the MGW for intra-office calls in the traditional networking scenario can be solved, and the optimal selection of the MGW for intra-office calls or inter-office calls in the MSC Pool scenario can also be solved.

Specifically, for the scenario A of the traditional networking, when an intra-office call is made in a non-full uplink scenario, MGW1 is the preferred desired MGW, that is, the two scenarios of user A calling user B and user B calling user A are both Optimization can be achieved; for scenario B of traditional networking, when making an intra-office call in the scenario of full uplink, users A and B can select MGW1 or MGW2 to achieve optimization.

For Scenario C and Scenario E of MSC Pool, when making an intra-office call or an inter-office call in a non-full uplink scenario, MGW1 is the preferred desired MGW; when making an intra-office call, user A calls user C and user The two scenarios of C calling user A need to be optimized. During the inter-office call, the two scenarios of user A calling user B and user B calling user C can be optimized; for scenarios D and F of MSC Pool In other words, when an intra-office call or an inter-office call is made in the full uplink scenario, user A, user B, and user C can all select MGW1 or MGW2 to be preferred.

According to a method for selecting an MGW provided by an embodiment of the present invention, the first mobile center switching server MSC Server acquires a media gateway MGW candidate list set common to the calling user and the called user; if the common MGW candidate list set contains For MGWs whose load is less than the first threshold, select one of the MGWs whose load is less than the first threshold as the common MGW serving the calling user and the called user; further, if the common MGW candidate list If the set does not contain MGWs with loads smaller than the first threshold, the MGWs of the calling user and the called user are selected respectively, so as to improve the utilization rate of network resources.

Embodiment two,

For the above different scenarios, the embodiment of the present invention provides a method for selecting an MGW, so as to realize optimal selection of the MGW. As shown in Figure 8, including:

S201. The first MSC Server obtains the MGW candidate list set A of the calling access side according to the location information of the calling user, and obtains the MGW candidate list set B of the outgoing relay side according to the configuration information of the outgoing relay side, and obtains the A The intersection M with B; said M includes the identification and load of each candidate MGW.

Wherein, the first MSC Server is an MSC Server on the calling party side.

S202. Acquire a set P of MGW candidate lists in the M whose load is smaller than a first threshold; the P is a set of MGW candidate lists on the calling user side, and includes the identifier and load of each candidate MGW.

Wherein, the first threshold may be set according to actual service conditions and network conditions.

S203. Send the message containing the P to the second MSC Server, so that the second MSC Server selects the common MGW serving the calling user and the called user, or selects the MGW serving the called user .

Wherein, the second MSC Server is an MSC Server on the side of the called user. If the second MSC Server has selected the common MGW serving the calling user and the called user, then the calling user and the called user make a call under the selected common MGW; if The second MSC Server only selects the MGW serving the called user, and the first MSC Server continues to execute step S204-step S205.

S204. If the second MSC Server only selects the MGW serving the called user, the first MSC Server receives a message including the MGW serving the called user sent by the second MSC Server.

S205. Acquire MGWs whose loads are smaller than the second threshold in the MGW candidate list set P on the calling access side, and select one of the MGWs whose loads are smaller than the second threshold as the MGW serving the calling user.

An embodiment of the present invention provides a method for selecting an MGW. In the scenario of an inter-office call, the acquired MGW candidate list set on the calling user side is sent to the second MSC Server, so that the second MSC Server selects Serving the common MGW of the calling user and the called user, or selecting the MGW serving the called user; if the second MSC Server only selects the MGW serving the called user, receiving the message sent by the second MSC Server containing The message of the MGW serving the called user is selected, and the MGW serving the calling user is selected to improve the utilization rate of network resources.

Embodiment three,

An embodiment of the present invention provides a method for selecting an MGW, as shown in FIG. 9 , including:

Step 301, after obtaining the called routing information flow, determine the call type between the calling user and the called user; if the call type is an intra-office call, jump to step 302; if the call type is an inter-office call , skip to step 309.

Step 302: If the call type between the calling user and the called user is an intra-office call, the MSC Server obtains the MGW candidate list set P={P ₁ ,P ₂ ,. ..,P _i }, P _i =(nP _i ,wP _i ), where P _i represents the i-th MGW in the set P, nP _i represents the identity of the i-th MGW, and wP _i represents the load of the i-th MGW.

Step 303, after the Call Confirmed message in the called flow, obtain the MGW candidate list set Q={Q ₁ ,Q ₂ ,...,Q _j } at the called access side according to the location information of the called user , Q _j =(nQ _j ,wQ _j ), where Q _j represents the jth MGW in the MGW candidate list set Q at the called access side, nQ _i represents the identity of the jth MGW, and wQ _i represents the jth MGW load.

Step 304: Obtain the intersection R of P and Q, where R _k = (nR _k , WR _k ), nR _k represents the identity of the kth MGW, and wR _k represents the load of the kth MGW.

If the intersection R is an empty set, execute step 305; if the intersection R contains only one MGW, execute step 306; if the intersection R includes at least one MGW, execute step 307.

Step 305, if intersection Execute step 308 .

Step 306: If there is only one MGW in the intersection R, and if the load of the MGW is less than the first threshold, select the MGW as the serving MGW for both the calling user and the called user, and perform step 320; if the load of the MGW If it is greater than the first threshold, perform step 308 .

Specifically, if R={R ₀ }, when , select R ₀ as the common serving MGW for the calling user and the called user, and perform step 320; when , execute step 308.

in, is the first threshold, and the first threshold may be set according to actual service conditions and network conditions.

Step 307: If at least one MGW is included in the intersection R, select an MGW with the smallest load in R, and select the MGW as the calling user and the called user when the load of the MGW is less than the first threshold For the common serving MGW, execute step 320; if the load of the MGW is greater than the first threshold, execute step 308.

Specifically, if R={R ₁ , R ₂ ,...,R _K }, where K>1. Select R ₀ , where wR ₀ =min{wR ₁ ,wR ₂ ,...,wR _K }. when , select R ₀ as the common serving MGW for the calling user and the called user, and perform step 320; when , execute step 308.

Step 308: Obtain the MGW with the smallest load among P and Q respectively, and the load of the MGW selected in P is less than the second threshold, and the load of the MGW selected in Q is less than the third threshold, then select these two MGWs as serving The MGWs of the calling user and the called user perform step 320 .

Specifically, select the MGW with the smallest load in P, denoted as P ₀ , where wP ₀ =min{wP ₁ ,wP ₂ ,...,wP _K }; select the MGW with the smallest load in Q, denoted as Q ₀ , where, wQ ₀ =min{wQ ₁ ,wQ ₂ ,...,wQ _K }. when and , select the MGW indicated by P ₀ as the serving MGW for the calling user, and select the MGW indicated by Q ₀ as the serving MGW for the called user; where, is the second threshold, is the third threshold.

It should be noted that, the second threshold and the third threshold are greater than or equal to the first threshold, the second threshold and the third threshold may be equal to or unequal, and the second threshold, The third threshold is set according to actual service conditions and network conditions.

like and when, or and when, or and , the selection fails.

Step 309, the MSC Server on the calling user side obtains the MGW candidate list on the calling access side as set A according to the location information of the calling user, and obtains the MGW candidate list on the outgoing trunk side as set B according to the configuration information on the outgoing trunk side , and get the intersection M of A and B (that is, M=A∩B), if the intersection of A and B is an empty set, then set M=A or B.

Step 310: Obtain a set P of MGW candidate lists in the M whose load is smaller than the second threshold; the P is a set of MGW candidate lists on the calling user side, and includes the identifier and load of each candidate MGW.

Step 311: Send the IAM message carrying the set P to the MSC Server at the called user side; correspondingly, the MSC Server at the called user side receives the IAM message containing the set P sent by the MSC Server at the calling user side.

Step 312, after the Call Confirmed message, the MSC Server on the called user side obtains the MGW candidate list on the called access side as set C according to the location information of the called user, and obtains the MGW candidate list on the incoming relay side according to the incoming relay side configuration information. The MGW candidate list is a set D, and the intersection Q of C and D is obtained. If the intersection of C and D is an empty set, Q=D.

Step 313. Obtain the intersection R of P and Q, where R _k =(nR _k , WR _k ).

If the intersection R is an empty set, perform step 314; if the intersection R contains only one MGW, perform step 315; if the intersection R contains at least one MGW, perform step 316.

Step 314. If the intersection R is an empty set, execute steps 317-319.

Step 315. If there is only one MGW in the intersection R, and if the load of the MGW is less than the first threshold, select the MGW as the serving MGW for both the calling user and the called user, and perform step 320; if the load of the MGW If it is greater than the first threshold, execute steps 317-319.

If R={R ₀ }, when , select R ₀ as the common serving MGW for the calling user and the called user, and perform step 320; when , execute steps 317-319.

in, is the first threshold, and the first threshold may be set according to actual service conditions and network conditions.

Step 316: If the intersection R contains only at least one MGW, select an MGW with the smallest load in R, and select the MGW as the calling user and called party when the load of the MGW is less than the first threshold. For the common serving MGW of the user, execute step 320; if the load of the MGW is greater than the first threshold, execute steps 317-319.

Specifically, if R={R ₁ , R ₂ ,...,R _K }, where K>1. Select R ₀ , where wR ₀ =min{wR ₁ ,wR ₂ ,...,wR _K }. when , select the MGW indicated by R ₀ as the common serving MGW for the calling user and the called user, and perform step 320; when , execute steps 317-319.

Step 317: The MSC Server at the called user side obtains the MGWs whose loads are smaller than the third threshold in the intersection Q, and selects the smallest one among the MGWs whose loads are smaller than the third threshold as the MGW serving the called user.

Specifically, select Q ₀ , where wQ ₀ =min{wQ ₁ ,wQ ₂ ,...,wQ _K }. when , select the MGW indicated by Q ₀ as the MGW serving the called user. in, is the third threshold.

Step 318: Send the first backward APM message carrying the Q ₀ to the calling user side MSC Server.

Step 319: The MSC Server on the calling user side acquires the MGWs whose load is less than the second threshold in the MGW candidate list set P on the calling access side, and selects the smallest one among the MGWs whose load is less than the second threshold as the service for the calling user MGW.

Specifically, select P ₀ , where wP ₀ =min{wP ₁ ,wP ₂ ,...,wP _K }. when , the MGW indicated by P ₀ is selected as the serving MGW of the calling user, and step 320 is executed.

It should be noted that, the second threshold and the third threshold are greater than or equal to the first threshold, the second threshold and the third threshold may be equal to or unequal, and the second threshold, The third threshold is set according to actual service conditions and network conditions.

Step 320, the optimization of the MGW is completed.

In step 317, if the intersection Q obtained by the MSC Server on the called user side does not include MGWs with a load less than the third threshold, the MSC Server on the called user side fails to select the MGW serving the called user. At this time, the MSC on the called user side The Server sends a resource release message (REL) to the MSC Server on the calling user side to inform the MSC Server on the calling user side to directly release resources, and the inter-office call fails.

An embodiment of the present invention provides a method for selecting an MGW. In different scenarios of an intra-office call or an inter-office call, by obtaining the common MGW candidate list of the calling user and the called user, if the common MGW candidate list set contains If there is an MGW with a load less than the first threshold, select one of the MGWs with the load less than the first threshold as the common MGW serving the calling user and the called user; further, if the common MGW candidate If the list set does not contain MGWs with loads smaller than the first threshold, the MGWs of the calling user and the called user are selected respectively, so as to improve the utilization rate of network resources.

Embodiment four,

As shown in Figure 10, MSC Server1 and MSC Server2 form an MSC Pool, user T is registered on MSC Server1, user H is registered on MSC Server2, T accesses the core network through BSC1, H accesses the core network through BSC2; BSC1 connects to MGW1 , MGW2, and BSC2 are connected to MGW1, MGW2, and MGW3. The load of MGW1 is 30%, the load of MGW2 is 50%, and the load of MGW3 is 20%. Assume that the first threshold, the second threshold, and the third threshold are all 100%.

For the above scenario, when user T initiates a call to user H (user T is the calling user, user H is the called user), the embodiment of the present invention provides a method for selecting an MGW, including:

Step 501, MSC Server1 judges that the call type between the calling user T and the called user H is an outgoing call after obtaining the called routing information flow.

Step 502, MSC Server1 obtains the MGW candidate list of the calling access side as a set A={MGW1, MGW2} according to the location information of the calling user T, and obtains the MGW candidate list of the outgoing trunk side according to the configuration information of the outgoing trunk side as Set B = {MGW1, MGW2}.

Step 503. Obtain the intersection M of A and B, where M=A∩B={MGW1, MGW2}.

Step 504: Select the MGW candidate list set P among M whose load is smaller than the second threshold.

Since the loads of MGW1 and MGW2 are both less than the second threshold, then P=A∩B={MGW1, MGW2}

Step 505, carry the P to MSC Server2 through an IAM message.

Step 506: After the Call Confirmed message, MSC Server2 obtains the MGW candidate list of the called access side as a set C={MGW1, MGW2, MGW3} according to the location information of the called user, and obtains the incoming MGW candidate list according to the configuration information of the incoming trunk side. The MGW candidate list on the successor side is a set D={MGW1, MGW2, MGW3}.

Step 507, obtain the intersection Q of C and D, because , then Q=C∩D={MGW1, MGW2, MGW3}.

Step 508, MSC Server2 acquires the intersection R of P and Q, where R=P∩Q={MGW1, MGW2}.

Step 509: Select R ₀ with the smallest load from R, where wR ₀ =min{30%,50%}=30%, so R ₀ =MGW1, and Then select MGW1 as the common serving MGW for the calling user T and the called user H.

Step 510, the MGW is preferably completed.

An embodiment of the present invention provides a method for selecting an MGW, by obtaining the media gateway MGW candidate list set common to the calling user and the called user; if the common MGW candidate list set includes an MGW whose load is less than the first threshold , then select one of the MGWs whose load is less than the first threshold as the common MGW serving the calling user and the called user, that is, in the scenario of an inter-office call, the calling user and the called user The user chooses the MGW with the lightest load to bear the voice service, which has achieved the load balance of the entire network and improved the utilization of network resources.

An embodiment of the present invention provides a mobile switching server. The mobile switching server uses the same steps as the above-mentioned method with the mobile switching server as the execution body, and details will not be repeated here. As shown in Figure 11, the mobile switching server 110 includes:

The first obtaining module 1101 is configured to obtain a media gateway MGW candidate list set common to the calling user and the called user; the common MGW candidate list set includes: providing services for both the calling user and the called user The identification and load of each candidate MGW;

A selection module 1102, configured to select one of the MGWs whose load is less than the first threshold if the common MGW candidate list set obtained by the first acquisition module 1101 includes MGWs with a load less than the first threshold as The MGW that serves the calling user and the called user is common.

Optionally, as shown in FIG. 12, if the call type between the calling user and the called user is an intra-office call, the first obtaining module 1101 includes:

The first obtaining unit 1101a is configured to obtain the MGW candidate list set P of the calling access side according to the location information of the calling user; the P includes the identification and load of each candidate MGW of the calling access side;

The second obtaining unit 1101b is configured to obtain the MGW candidate list set Q of the called access side according to the location information of the called user; the Q includes the identification and load of each candidate MGW of the called access side;

The third obtaining unit 1101c is configured to obtain the intersection R of the P obtained by the first obtaining unit 1101a and the Q obtained by the second obtaining unit 1101b, and use the intersection R as the calling user and the called party A set of common MGW candidate lists for users.

Optionally, as shown in FIG. 12, if the call type between the calling user and the called user is an intra-office call, when the common MGW candidate list set does not contain MGW, the mobile switching server further includes:

The second acquiring module 1103 is configured to acquire MGWs whose load is less than the second threshold in the MGW candidate list set P on the calling access side, and MGWs whose load is less than the third threshold in the MGW candidate list set Q on the called access side;

The selection module 1102 is further configured to select one of the MGWs whose load obtained by the second acquisition module 1103 is less than the second threshold as the calling user's MGW, and select the load obtained by the second acquisition module 1103 to be less than the third threshold. One of the MGWs with the threshold is used as the MGW of the called user.

Optionally, as shown in FIG. 12, if the call type between the calling user and the called user is an inter-office call, the mobile switching server further includes: a receiving module 1104 and a third obtaining module 1105;

The receiving module 1104 is configured to receive the MGW candidate list set M sent by the second MSC Server and including the load of the calling user side less than the second threshold; the M is the location information of the calling user according to the second MSC Server Obtain the MGW candidate list set A of the calling access side, and obtain the MGW candidate list set B of the outgoing relay side according to the configuration information of the outgoing relay side, and obtain the intersection S of the A and B, if the A and B The intersection is an empty set, S is equal to A or B, and the MGW candidate list set M whose load is less than the second threshold in the intersection S is obtained, and the M includes the identification and load of each candidate MGW on the calling user side;

The third obtaining module 1105 is configured to obtain the MGW candidate list set C of the called access side obtained according to the location information of the called user, and the MGW candidate list of the incoming relay side obtained according to the configuration information of the incoming relay side A list set D, obtaining the intersection N of the C and D, if the intersection of C and D is an empty set, N is equal to D, and the N includes the identification and load of each candidate MGW on the called user side;

The first obtaining module 1101 is further configured to obtain an intersection R of M obtained by the receiving module 1104 and N obtained by the third obtaining module 1105, and use the intersection R as the calling user and the called user It is called the user's common MGW candidate list set.

Optionally, as shown in FIG. 12, if the call type between the calling user and the called user is an inter-office call, when the common MGW candidate list set does not contain The MGW, the mobile switching server further includes:

The fourth acquiring module 1106 is configured to acquire the MGWs whose load is less than the third threshold in the MGW candidate list set N of the called access side, and select one of the MGWs whose load is less than the third threshold to serve the called user the MGW;

The sending module 1107 is configured to send the message containing the MGW selected by the called user to the second MSC Server, so that the second MSC Server obtains the MGW whose load is less than the second threshold in the MGW candidate list set M of the calling access side and selecting one of the MGWs whose load is smaller than a second threshold as the MGW serving the calling user.

An embodiment of the present invention provides a device for selecting an MGW. The first mobile center switching server MSC Server acquires a media gateway MGW candidate list set common to the calling user and the called user; if the common MGW candidate list set contains For MGWs whose load is less than the first threshold, select one of the MGWs whose load is less than the first threshold as the common MGW serving the calling user and the called user; further, if the common MGW candidate list If the set does not contain MGWs with loads smaller than the first threshold, the MGWs of the calling user and the called user are selected respectively, so as to improve the utilization rate of network resources.

An embodiment of the present invention provides a mobile switching server. The mobile switching server uses the same steps as the above-mentioned method with the mobile switch as the execution subject, and will not be repeated here. As shown in Figure 13, the mobile switching server 130 includes:

The first obtaining module 1301 is configured to obtain the MGW candidate list set A of the calling access side according to the location information of the calling user, and obtain the MGW candidate list set B of the outgoing relay side according to the configuration information of the outgoing relay side, and obtain the The intersection M of A and B; the M contains the identity and load of each candidate MGW;

The second acquiring module 1302 is configured to acquire the set P of MGW candidate lists in M obtained by the first acquiring module 1301, whose load is less than the second threshold; the set P is the set of MGW candidate lists on the calling user side, including MGW identification and load;

A sending module 1303, configured to send a message containing the set P obtained by the second obtaining module 1302 to the first MSC Server, so that the first MSC Server chooses to jointly serve the calling user and the called user MGW, or select the MGW serving the called user;

The receiving module 1304 is configured to receive a message including the MGW serving the called user sent by the first MSC Server if the first MSC Server only selects the MGW on the called user side;

The third acquiring module 1305 is configured to acquire the MGWs whose load is less than the second threshold in the MGW candidate list set P on the calling access side, and select one of the MGWs whose load is less than the second threshold as the one serving the calling user MGW.

An embodiment of the present invention provides an apparatus for selecting an MGW. In the scenario of an inter-office call, the acquired MGW candidate list set on the calling user side is sent to a second MSC Server, so that the second MSC Server selects Serving the common MGW of the calling user and the called user, or selecting the MGW serving the called user; if the second MSC Server only selects the MGW serving the called user, receiving the message sent by the second MSC Server containing The message of the MGW serving the called user is selected, and the MGW serving the calling user is selected to improve the utilization rate of network resources.

An embodiment of the present invention provides a mobile switching server. As shown in FIG.

Wherein, the memory 1403 and the processor 1404 are coupled together through a bus system 1405, wherein the bus system 1405 may include a power bus, a control bus, and a status signal bus, etc. in addition to a data bus. However, for clarity of illustration, the various buses are labeled as bus system 1405 in the figure.

The memory 1403 may include read-only memory and random-access memory, and provides instructions and data to the processor 1404 . A part of the memory 1403 may also include non-volatile random access memory (NVRAM).

The memory 1403 stores the following elements, executable modules or data structures, or their subsets, or their extended sets:

Operation instructions: include various operation instructions for realizing various operations.

Operating system: includes various system programs for implementing various basic services and processing hardware-based tasks.

The processor 1404 executes the following operations by invoking the operation instruction stored in the memory 1403 (the operation instruction may be stored in the operating system): obtain the media gateway MGW candidate list set common to the calling user and the called user; the common The MGW candidate list set includes: the identification and load of each candidate MGW that provides services for both the calling user and the called user; if the common MGW candidate list set contains MGWs with a load less than the first threshold, Then select one of the MGWs whose load is smaller than the first threshold as the MGW that serves both the calling user and the called user.

Optionally, if the call type between the calling user and the called user is an intra-office call, the processor 1404 is specifically configured to obtain the MGW candidate list at the calling access side according to the location information of the calling user Set P; said P contains the identification and load of each candidate MGW on the calling access side; obtains the MGW candidate list set Q on the called access side according to the location information of the called user; said Q includes the The identification and load of each candidate MGW on the ingress side; obtaining the intersection R of the P and Q, and using the intersection R as a set of MGW candidate lists common to the calling user and the called user.

Optionally, if the call type between the calling user and the called user is an intra-office call, if the common MGW candidate list set does not include an MGW with a load less than the first threshold, the processor 1404 is also used to obtain the MGWs whose load is less than the second threshold in the MGW candidate list set P on the calling access side, and the MGWs whose load is less than the third threshold in the MGW candidate list set Q on the called access side; select the One of the MGWs whose load is smaller than the second threshold is used as the MGW serving the calling user, and one of the MGWs whose load is smaller than the third threshold is used as the MGW serving the called user.

Optionally, if the call type between the calling user and the called user is an inter-office call, the receiver 1401 is configured to receive the second A threshold MGW candidate list set M; the M is the second MSC Server acquires the MGW candidate list set A of the calling access side according to the location information of the calling user, and acquires the outbound trunk according to the configuration information of the outbound trunk side The MGW candidate list set B on the side obtains the intersection S of the A and B, if the intersection of the A and B is an empty set, S is equal to A or B, and obtains the MGW whose load is less than the second threshold from the intersection S A candidate list set M, the M includes the identity and load of each candidate MGW on the calling user side;

The processor 1404 is configured to obtain the MGW candidate list set C of the called access side obtained according to the location information of the called user, and the MGW candidate list set D of the incoming relay side obtained according to the configuration information of the incoming relay side , to obtain the intersection N of C and D, if the intersection of C and D is an empty set, N is equal to D, and the N contains the identity and load of each candidate MGW on the called user side; obtain the M and An intersection R of N, using the intersection R as a set of MGW candidate lists common to the calling user and the called user.

Optionally, if the call type between the calling user and the called user is an inter-office call, and if the common MGW candidate list set does not include an MGW with a load less than the first threshold, the processing The module 1404 is further configured to obtain an MGW whose load is less than a third threshold in the MGW candidate list set N at the called access side, and select one of the MGWs whose load is less than the third threshold as the MGW serving the called user;

The sender 1402 is configured to send a message containing the MGW selected by the called user to the second MSC Server, so that the second MSC Server obtains the MGW candidate list set M of the calling access side whose load is less than the second threshold. The MGW selects one of the MGWs whose load is smaller than the second threshold as the MGW serving the calling user.

Optionally, the load of each MGW is the ratio between the number of available idle circuits of each MGW and the total number of circuits of each MGW; or, it is the number of sessions currently on each MGW and the maximum session number that each MGW can provide The ratio between the quantities.

According to an apparatus for selecting an MGW provided by an embodiment of the present invention, the first mobile center switching server MSC Server acquires a media gateway MGW candidate list set common to the calling user and the called user; if the common MGW candidate list set contains For MGWs whose load is less than the first threshold, select one of the MGWs whose load is less than the first threshold as the common MGW serving the calling user and the called user; further, if the common MGW candidate list If the set does not contain MGWs with loads smaller than the first threshold, the MGWs of the calling user and the called user are selected respectively, so as to improve the utilization rate of network resources.

An embodiment of the present invention provides a mobile exchange server. As shown in FIG.

Wherein, the memory 1503 and the processor 1504 are coupled together through a bus system 1505, wherein the bus system 1505 may include a power bus, a control bus, and a status signal bus in addition to a data bus. However, for clarity of illustration, the various buses are labeled as bus system 1505 in the figure.

The memory 1503 may include read-only memory and random-access memory, and provides instructions and data to the processor 1504 . A part of the memory 1503 may also include non-volatile random access memory (NVRAM).

The memory 1503 stores the following elements, executable modules or data structures, or their subsets, or their extended sets:

Operation instructions: include various operation instructions for realizing various operations.

Operating system: includes various system programs for implementing various basic services and processing hardware-based tasks.

The processor 1504 calls the operation instruction stored in the memory 1503 (the operation instruction can be stored in the operating system), and is used to obtain the MGW candidate list set A of the calling access side according to the location information of the calling user, and according to the outgoing call The relay side configuration information obtains the MGW candidate list set B of the outbound relay side, and obtains the intersection M of the A and B; the M contains the identification and load of each candidate MGW; the load in the M is less than the first The threshold MGW candidate list set P; the P is the MGW candidate list set on the calling user side, including the identification and load of each candidate MGW;

The sender 1502 is configured to send the message containing the P to the second MSC Server, so that the second MSC Server selects the MGW that serves the calling user and the called user, or selects the MGW that serves the calling user and the called user. call the user's MGW;

The receiver 1501 is configured to receive a message including the MGW serving the called user sent by the second MSC Server if the second MSC Server only selects the MGW on the called user side;

The processor 1504 invokes the operation instruction stored in the memory 1503 (the operation instruction can be stored in the operating system) to obtain the MGWs whose load is less than the second threshold in the MGW candidate list set P on the calling access side, and select the selected One of the MGWs whose load is smaller than the second threshold is used as the MGW serving the calling user.

Optionally, the load of each MGW is the ratio between the number of available idle circuits of each MGW and the total number of circuits of each MGW; or, it is the number of sessions currently on each MGW and the maximum session number that each MGW can provide The ratio between the quantities.

An embodiment of the present invention provides an apparatus for selecting an MGW. In the scenario of an inter-office call, the acquired MGW candidate list set on the calling user side is sent to a second MSC Server, so that the second MSC Server selects Serving the common MGW of the calling user and the called user, or selecting the MGW serving the called user; if the second MSC Server only selects the MGW serving the called user, receiving the message sent by the second MSC Server containing The message of the MGW serving the called user is selected, and the MGW serving the calling user is selected to improve the utilization rate of network resources.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units may be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute some steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM for short), random access memory (Random Access Memory, RAM for short), magnetic disk or optical disk, etc., which can store program codes. medium.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (12)

1. A method for selecting MGW, characterized in that, comprising: The first mobile center switching server MSC Server acquires the common media gateway MGW candidate list set of the calling user and the called user; the common MGW candidate list set includes: providing services for both the calling user and the called user The identification and load of each candidate MGW; If the common MGW candidate list set contains an MGW with a load less than the first threshold, select one of the MGWs with the load less than the first threshold as the MGW that serves the calling user and the called user ; Wherein, if the call type between the calling user and the called user is an inter-office call, the common MGW candidate list set obtained by the first MSCServer for the calling user and the called user includes: Receive the MGW candidate list set M sent by the second MSC Server and include the load of the calling user side less than the second threshold; the M is the MGW on the calling access side obtained by the second MSC Server according to the location information of the calling user The candidate list set A, and the MGW candidate list set B obtained on the outgoing relay side according to the configuration information of the outgoing relay side, and the intersection S of the A and B are obtained. If the intersection of the A and B is an empty set, S is equal to A or B, obtaining the MGW candidate list set M whose load is less than the second threshold from the intersection S, where the M contains the identification and load of each candidate MGW on the calling user side; The MGW candidate list set C of the called access side obtained according to the location information of the called user, and the MGW candidate list set D of the incoming relay side obtained according to the configuration information of the incoming relay side, obtain the C and D The intersection N of C, if the intersection of C and D is an empty set, N is equal to D, and said N includes the identification and load of each candidate MGW on the called user side; The intersection R of the M and N is obtained, and the intersection R is used as a set of MGW candidate lists common to the calling user and the called user. 2. The method according to claim 1, wherein if the call type between the calling user and the called user is an intra-office call, the first MSC Server obtains the calling user and the called user A common set of MGW candidate lists includes: Obtain the MGW candidate list set P of the calling access side according to the location information of the calling user; said P includes the identification and load of each candidate MGW of the calling access side; Acquire the MGW candidate list set Q of the called access side according to the location information of the called user; the Q includes the identification and load of each candidate MGW of the called access side; The intersection R of the P and Q is obtained, and the intersection R is used as a set of MGW candidate lists common to the calling user and the called user. 3. The method according to claim 2, wherein if the call type between the calling user and the called user is an intra-office call, the method further comprises: if the common MGW candidate list The set does not contain MGWs with a load less than the first threshold, Obtaining MGWs whose load is less than the second threshold in the MGW candidate list set P on the calling access side, and MGWs whose load is less than the third threshold in the MGW candidate list set Q on the called access side; Selecting one of the MGWs whose load is less than the second threshold as the MGW serving the calling user, and one of the MGWs whose load is less than a third threshold as the MGW serving the called user. 4. The method according to claim 1, wherein if the call type between the calling user and the called user is an inter-office call, the method further comprises: if the common MGW candidate MGWs with a load less than the first threshold are not included in the list set, Obtain an MGW whose load is less than a third threshold in the MGW candidate list set N on the called access side, and select one of the MGWs whose load is less than the third threshold as an MGW serving the called user; Send a message containing the MGW selected by the called user to the second MSC Server, so that the second MSC Server obtains the MGW whose load is less than the second threshold in the MGW candidate list set M of the calling access side, and selects the MGW whose load is less than the second threshold. One of the MGWs with the second threshold serves as the MGW serving the calling user. 5. The method according to any one of claims 1-4, wherein the load of each MGW is the ratio between the number of available idle circuits of each MGW and the total number of circuits of each MGW; The ratio between the current number of sessions on each MGW and the maximum number of sessions that each MGW can provide. 6. A method for selecting an MGW, comprising: The first MSC Server obtains the MGW candidate list set A of the calling access side according to the location information of the calling user, and obtains the MGW candidate list set B of the outgoing trunk side according to the configuration information of the outgoing trunk side, and obtains the A and B The intersection M of; Said M contains the identification and the load of each candidate MGW; Obtaining the MGW candidate list set P whose load is less than the first threshold in the M; the P is the MGW candidate list set on the calling user side, including the identifier and load of each candidate MGW; Sending the message containing the P to the second MSC Server, so that the second MSC Server selects the MGW that serves the calling user and the called user, or selects the MGW that serves the called user; If the second MSC Server only selects the MGW on the side of the called user, the first MSC Server receives a message sent by the second MSC Server that includes the MGW serving the called user; Acquiring MGWs whose loads are less than the second threshold in the MGW candidate list set P on the calling access side, and selecting one of the MGWs whose loads are less than the second threshold as the MGW serving the calling user. 7. The method according to claim 6, wherein the load of each MGW is the ratio between the number of available idle circuits of each MGW and the total number of circuits of each MGW; or, it is the load of each MGW currently The ratio between the number of sessions and the maximum number of sessions that each MGW can provide. 8. A mobile switching server, characterized in that, comprising: The first acquiring module is configured to acquire a media gateway MGW candidate list set common to the calling user and the called user; the common MGW candidate list set includes: services provided for both the calling user and the called user Identification and load of each candidate MGW; A selection module, configured to select one of the MGWs with a load smaller than the first threshold as the serving station if the common MGW candidate list set obtained by the first acquisition module includes an MGW with a load smaller than the first threshold. The MGW common to the calling user and the called user; Wherein, if the call type between the calling user and the called user is an inter-office call, the mobile switching server further includes: a receiving module and a third obtaining module; The receiving module is configured to receive the MGW candidate list set M sent by the second MSC Server and containing the load of the calling user side less than the second threshold; the M is obtained by the second MSC Server according to the location information of the calling user The MGW candidate list set A of the calling access side, and the MGW candidate list set B of the outgoing relay side obtained according to the configuration information of the outgoing relay side, to obtain the intersection S of the A and B, if the intersection of the A and B It is an empty set, S is equal to A or B, and the MGW candidate list set M whose load is less than the second threshold in the intersection S is obtained, and the M includes the identification and load of each candidate MGW on the calling user side; The third acquisition module is configured to acquire the MGW candidate list set C of the called access side obtained according to the location information of the called user, and the MGW candidate list of the incoming relay side obtained according to the configuration information of the incoming relay side Set D to obtain the intersection N of the C and D, if the intersection of C and D is an empty set, N is equal to D, and the N includes the identification and load of each candidate MGW on the called user side; The first obtaining module is further configured to obtain an intersection R of M obtained by the receiving module and N obtained by the third obtaining module, and use the intersection R as the common value of the calling user and the called user. MGW candidate list set. 9. The mobile switching server according to claim 8, wherein if the call type between the calling user and the called user is an intra-office call, the first obtaining module includes: The first obtaining unit is configured to obtain the MGW candidate list set P of the calling access side according to the location information of the calling user; the P includes the identification and load of each candidate MGW of the calling access side; The second obtaining unit is used to obtain the MGW candidate list set Q of the called access side according to the location information of the called user; the Q includes the identification and load of each candidate MGW of the called access side; The third acquisition unit is configured to acquire the intersection R of the P obtained by the first acquisition unit and the Q obtained by the second acquisition unit, and use the intersection R as the common value of the calling user and the called user MGW candidate list set. 10. The mobile switching server according to claim 9, wherein if the call type between the calling user and the called user is an intra-office call, when the common MGW candidate list set does not include There are MGWs with a load less than the first threshold, and the mobile switching server further includes: The second acquisition module is configured to acquire MGWs whose load is less than the second threshold in the MGW candidate list set P of the calling access side, and MGWs whose load is less than the third threshold in the MGW candidate list set Q of the called access side; The selection module is further configured to select one of the MGWs whose load obtained by the second acquisition module is less than a second threshold as the calling user's MGW, and select an MGW whose load obtained by the second acquisition module is less than a third threshold One of them is the MGW of the called user. 11. The mobile switching server according to claim 8, wherein if the call type between the calling user and the called user is an inter-office call, when there is no Including MGWs whose load is less than the first threshold, the mobile switching server further includes: The fourth acquisition module is configured to acquire the MGWs whose load is less than the third threshold in the MGW candidate list set N on the called access side, and select one of the MGWs whose load is less than the third threshold as the one serving the called user MGW; The sending module is configured to send the message containing the MGW selected by the called user to the second MSC Server, so that the second MSC Server obtains the MGW whose load is less than the second threshold in the MGW candidate list set M of the calling access side and selecting one of the MGWs whose load is smaller than a second threshold as the MGW serving the calling user. 12. A mobile exchange server, characterized in that, comprising: The first obtaining module is used to obtain the MGW candidate list set A of the calling access side according to the location information of the calling user, and obtain the MGW candidate list set B of the outgoing relay side according to the configuration information of the outgoing relay side, and obtain the The intersection M of A and B; said M contains the identification and load of each candidate MGW; The second acquisition module is used to acquire the MGW candidate list set P whose load is less than the second threshold in M obtained by the first acquisition module; the P is the MGW candidate list set on the calling user side, including each candidate MGW identification and load; a sending module, configured to send a message including the set P obtained by the second obtaining module to the first MSC Server, so that the first MSC Server selects an MGW that jointly serves the calling user and the called user, or Select the MGW serving the called user; A receiving module, configured to receive a message sent by the first MSC Server that includes the MGW serving the called user if the first MSC Server only selects the MGW on the called user side; A third acquisition module, configured to acquire an MGW with a load less than the second threshold in the MGW candidate list set P at the calling access side, and select one of the MGWs with the load less than the second threshold as the MGW serving the calling user .