WO2008095420A1

WO2008095420A1 - A method and apparatus for limiting the call

Info

Publication number: WO2008095420A1
Application number: PCT/CN2008/070034
Authority: WO
Inventors: Shunli Zheng; Haopeng Zhu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-02-01
Filing date: 2008-01-07
Publication date: 2008-08-14
Also published as: CN100596104C; CN101026560A

Abstract

A method and apparatus for limiting the call are provided. Media Gateway ( MGW) sets the maximum virtual tunnel number, the method includes: determining whether the presently occupied virtual tunnel number and the maximum virtual number meet the predetermined condition according to the handover request or the call request, or determining whether the presently non-occupied virtual tunnel number meets the predetermined condition; if meeting the predetermined condition, allocating the virtual tunnel for the user corresponding to said request; otherwise, rejecting to allocate the virtual tunnel for the user corresponding to said request. The predetermined condition may be whether the presently occupied virtual tunnel number reaches the maximum virtual tunnel number. The embodiments of the present invention implement the limit for the access user number, in order to ensure the service quality of the access user.

Description

Method and device for limiting call

[I] Technical field

[2] The present invention relates to the field of network communication technologies, and in particular, to a call restriction method and apparatus.

[3] Background of the invention

[4] With the development of communication technologies, the application of mature IP technologies to communication networks has become a trend. The use of IP technology in the communication network can realize IP networking throughout the network, which can simplify the networking mode of the communication network, thereby reducing the networking cost. However, because the resources in the IP mode are dynamically allocated, when the number of users is too large, the data transmission delay and the packet loss rate will increase, thereby reducing the communication quality of the access users. How to control the number of access users and ensure the quality of communication that has been accessed by users is an urgent problem to be solved.

[5] Summary of the invention

[6] An embodiment of the present invention provides a method and device for limiting a call, which limits an incoming call through a virtual channel, effectively controls the number of access users, and ensures the communication quality of the already accessed user.

[7] The embodiment of the present invention provides a method for limiting a call, where the maximum number of virtual channels corresponding to the media gateway is set, and the method includes the following steps:

[8] determining, according to the handover request or the call request, whether the number of virtual channels currently occupied and the maximum number of virtual channels meet the predetermined condition; or determining whether the number of virtual channels currently not occupied meets the predetermined condition;

[9] if the predetermined condition is met, the virtual channel is allocated to the user corresponding to the request;

[10] If the predetermined condition is not met, the virtual channel for the user corresponding to the request is refused.

[I I] An embodiment of the present invention further provides a call restriction device, including: a storage module and a call restriction module;

[12] Storage module: The maximum number of virtual channels used to store the media gateway, and the number of virtual channels currently occupied;

[13] Call Restriction Module: It is used to determine whether the number of virtual channels currently occupied and the maximum number of virtual channels meet the predetermined conditions according to the information stored in the storage module, or to determine whether the number of virtual channels currently not occupied meets the predetermined conditions. After the predetermined condition is met, the virtual channel is allocated to the user corresponding to the handover request or the call request, and after determining that the predetermined condition is not met, the handover request or the call request is not corresponding. The user assigns a virtual channel.

[14] The description of the foregoing technical solution shows that the virtual channel can effectively limit the number of access users and ensure the quality of service of the access user. The maximum number of virtual channels in the embodiment of the present invention can be dynamic. The technical solution provided by the embodiment of the present invention improves the quality of service of the access user.

[15] BRIEF DESCRIPTION OF THE DRAWINGS

[16] FIG. 1 is a schematic diagram of a prior art MINI-IU-FLEX networking;

2 is a flow chart 1 of a method for restricting calls according to an embodiment of the present invention;

FIG. 3 is a second flowchart of a call restriction method according to an embodiment of the present invention; FIG.

FIG. 4 is a third flowchart of a call restriction method according to an embodiment of the present invention; FIG.

FIG. 5 is a fourth flowchart of a call restriction method according to an embodiment of the present invention; FIG.

6 is a flowchart 5 of a call restriction method according to an embodiment of the present invention;

[22] FIG. 7 is a flowchart 6 of a call restriction method according to an embodiment of the present invention;

[23] FIG. 8 is a flowchart 7 of a call restriction method according to an embodiment of the present invention;

[24] FIG. 9 is a flowchart 8 of a call restriction method according to an embodiment of the present invention;

FIG. 10 is a flowchart IX of a call restriction method according to an embodiment of the present invention; FIG.

Figure 11 is a schematic diagram of a call restriction device according to an embodiment of the present invention.

[27] Mode for carrying out the invention

[28] In the embodiment of the present invention, the call restriction control operation on the media gateway may be performed by the mobile switching device.

The mobile switching device can be GSM (Global System for Mobile)

MSC Server (Mobile Switching Centre Server) in Communications, Global Mobile Telecommunications System; the mobile switching device can also be MSC in UMTS (Universal Mobile Telecommunications System)

Server; The mobile switching device can also be an MSCe in a CDMA200 (Code Division Multiple Access) system.

[29] The call restriction control of the mobile switching device in the embodiment of the present invention may be for the MGW (Media)

Gateway, Media Gateway A wireless communication interface that communicates with other network entities. The wireless communication interface can be MGW and RNC (Radio Network)

IU interface between Controller, wireless network controller), can be for BSC (Base Station Controller, base station controller) A interface with MGW, also can be MGW and BSS (Base Station

The A interface between the Sub-System and the base station subsystem can also be an Nb interface between the office route and the MGW. The interface between the office route and the MGW can be an interface between two MGWs. The office direction here is the concept between two exchanges, that is, if there is a direct channel between the two exchanges, then one exchange is called an office of another exchange. The interface can be an IP interface.

[30] The embodiment of the present invention can configure the maximum number of virtual channels of the wireless communication interface on the MGW by using the maintenance command, for example, the mobile switching device configures the maximum virtual channel according to the maintenance command received by the management terminal and transmitted by the management terminal. The number is as follows: The mobile switching device actively configures the maximum number of virtual channels mentioned above. After configuring the maximum number of virtual channels on the MGW, you can consider the bandwidth of the wireless communication interface on the MGW. Of course, other factors such as the processing capacity of the MGW can be considered when configuring the maximum number of virtual channels. The bandwidth of the wireless communication interface on the MGW is the bandwidth between the RNC and the MGW, and the bandwidth between the office route and the MGW. The bandwidth between the office route and the MGW can be the bandwidth between the two MGWs.

[31] The mobile switching device can dynamically adjust the maximum number of virtual channels of the wireless communication interface on the MGW according to the actual situation of the network, for example, the mobile switching device dynamically adjusts the maximum number of virtual channels of the wireless communication interface on the MGW according to the assigned success rate in the network; Another example is mobile switching equipment based on IP

QOS (Quality of Service) to dynamically adjust the maximum number of virtual channels on the wireless communication interface on the MGW; also, the mobile switching device can be based on the assigned success rate and IP

QOS dynamically adjusts the maximum number of virtual channels on the wireless communication interface on the MGW. Of course, the mobile switching device can also dynamically adjust the maximum number of virtual channels according to other parameters in the network. Moreover, the operation of dynamically adjusting the maximum number of virtual channels can also be implemented by other network devices, such as by the management terminal.

[32] The following takes the assignment success rate and IP QOS as examples, for MSC

The method of dynamically adjusting the maximum channel number of the wireless communication interface on the MGW is described.

[33] The MGW reports IP QOS information to the MSC Server. The MGW can report the IP QOS information to the MSC Server by using the method of the fixed report. The MGW can also report the IP to the MSC Server by reporting the change after the IP QOS changes.

QOS information; The MGW may report the IP to the MSC Server after a partial failure occurs on the bearer plane between the RNC and the MGW, or after the bearer plane changes from the fault to the recovery. QOS information. The embodiment of the present invention does not limit the MGW to report the IP to the MSC Server.

The trigger condition of the QOS message. The MSC Server reports the IP according to the MGW.

QOS information to dynamically adjust the maximum number of virtual channels.

[34] RNC for UP (User) when the bearing surface fails

Plane, User Face) When the mode is supported mode, the RNC will initiate a UP initialization operation. After the UP initialization operation fails, the RNC will return the information of the assignment failure to the MSC Server, MSC.

The server calculates the success rate of the assignment according to the number of assignment failures of the received special information value of the assignment information, and dynamically adjusts the maximum virtual channel number according to the calculated success rate of the assignment.

[35] For convenience of description, in the following embodiments, the technical solutions of the embodiments of the present invention will be described in detail by taking the GSM and UMTS systems as examples.

[36] When an MSC Server corresponds to multiple MGWs, the MSC in the embodiment of the present invention

Server can set the maximum number of virtual channels for each wireless communication interface on each MGW.

[37] After setting the maximum number of virtual channels for the wireless communication interface, MSC

The server can control the number of access users according to the maximum number of virtual channels, that is, MSC.

After the server receives the handover request or the call request, such as MSC

Server receives a Setup message or IAM (initial Address)

After the message, the initial address message, it is necessary to determine whether the number of virtual channels currently occupied and the maximum number of virtual channels meet the predetermined conditions. If the predetermined condition is met, the MSC

The server allocates a virtual channel to the user corresponding to the request. If the predetermined condition is not met, the MSC Server does not allocate a virtual channel for the user corresponding to the request. The predetermined condition here may be: whether the number of virtual channels currently occupied has reached the maximum number of virtual channels, and if the number of currently occupied virtual channels has reached the maximum number of virtual channels, the MSC

The server does not allocate a virtual channel for the user corresponding to the request; if the number of currently occupied virtual channels has not reached the maximum number of virtual channels, the MSC

The server allocates a virtual channel for the user corresponding to the request. The predetermined condition here may also be other forms, such as whether the ratio of the currently occupied virtual channel number to the maximum virtual channel number reaches a predetermined value or the like. The number of virtual channels that are currently occupied and the number of virtual channels that are not currently occupied are two concepts. Therefore, the embodiment of the present invention can also determine the number of virtual channels that are currently not occupied and the maximum virtual channel. Count to achieve limit calls. In the following description of the embodiments, the predetermined condition is exemplified by whether the number of virtual channels currently occupied has reached the maximum number of virtual channels, and an embodiment of the present invention is described.

In an embodiment of the invention, the MSC

The statistics of the number of occupied virtual channels by the server can be based on the number of access users. For example, an access user uses a fixed number of virtual channels or a fixed number of virtual channels. Thus, the MSC Server is in an access mode. After the number of virtual channels is allocated to the user's call, the number of virtual channels currently occupied must be modified, for example, the number of virtual channels currently occupied is increased by one;

After the server releases a call from an access user, the server also needs to modify the number of virtual channels that are currently occupied, such as reducing the number of virtual channels currently occupied by one.

[39] MSC

The statistics of the number of occupied virtual channels by the server can also be based on the radio access bearer of the call. For example, one radio access bearer of the call occupies a virtual channel number. Here, MSC

The server needs to maintain the number of virtual channels currently occupied according to the number of radio access bearers corresponding to the accessed users, such as MSC.

After the number of virtual channels is allocated to a call, the server needs to increase the number of virtual channels currently occupied according to the number of radio access bearers of the call;

After the server releases a call, it needs to reduce the number of virtual channels currently occupied according to the number of radio access bearers that release the call.

[40] When an MSC

The server corresponds to multiple MGWs, and the wireless communication interface on each MGW is set with the maximum number of virtual channels. In this case of networking, MSC

The Server can selectively allocate virtual channels for the call requests or users corresponding to the handover request. In the following, for an MSC Server corresponding to multiple MGWs, the MSC

The method for the server to allocate a virtual channel to the user of the incoming call is described.

[41] MSC Server receives an incoming call, MSC

The server determines the MGW corresponding to the office route of the incoming call, and if the office route of the incoming call corresponds to only one MGW, the MSC

The server determines whether the current number of virtual channels occupied by the MGW reaches the wireless communication connection on the MGW. The maximum number of virtual channels of the port. If the maximum number of virtual channels is not reached, the MSC

The server allocates a virtual channel for the user of the incoming call from the virtual channel of the corresponding MGW; if the maximum number of virtual channels is reached, the MSC

The server refuses to assign a virtual channel to the user of the incoming call.

[42] When the MSC Server determines that the office route of the incoming call corresponds to multiple MGWs, the MSC

The server determines whether the number of virtual channels currently occupied by the multiple MGWs does not reach the maximum number of virtual channels, and the number of virtual channels that have not been occupied by the current number of virtual channels does not reach the maximum number of virtual channels.

The server selects one MGW from the plurality of MGWs that have not reached the maximum number of virtual channels according to the predetermined rule, and allocates a virtual channel to the user of the incoming call from the virtual channel of the selected MGW; the number of virtual channels currently occupied does not reach the maximum The MGW of the virtual channel number is a 吋, MSC

The server directly allocates a virtual channel for the user of the incoming call from the virtual channel of the MGW. After the number of currently occupied virtual channels of multiple MGWs corresponding to the limitation of the incoming call reaches the maximum number of virtual channels, the MSC Server refuses to allocate a virtual channel for the incoming call.

[43] In the description of the above embodiment, the predetermined rule may use one or more of the following: the priority of the MGW, the maximum number of available virtual channels, the highest proportion of available virtual channels, round selection, random selection, and the like. The predetermined rule may be any rule that selects one MGW from a plurality of MGWs. The embodiment of the invention does not limit the specific manifestation of the predetermined rules.

In an embodiment of the invention, the MSC

The Server can also set the virtual channel to the blocked state according to specific needs. For example, if the fault occurs on the bearing surface or temporarily stops using a wireless communication interface due to detection, etc., the virtual channel of the wireless communication interface can be set to the blocked state. There are several ways to set the virtual channel to the occlusion state, such as setting the maximum number of virtual channels of the wireless communication interface to zero, and setting the number of currently occupied virtual channels of the wireless communication interface to the maximum number of virtual channels, and then The maximum number of virtual channels is set to a specific value and so on. Embodiments of the present invention do not limit MSC

Server sets the virtual channel to a specific representation of the occlusion state. After setting the virtual channel of the wireless communication interface to the occlusion state, the MSC

_{The server} no longer requests the corresponding user for the call request or handover request from the virtual channel of the wireless communication interface. Assign a virtual channel.

[45] In an embodiment of the invention, the MSC

The process of the server refusing to allocate a virtual channel for the user corresponding to the call request or the handover request may be: The M SC Server directly sends a command to the user to refuse to allocate the virtual channel; or it may be: MSC

The Server sends a command to the RNC or BSC to reject the allocation of the virtual channel.

[46] MSC in the embodiment of the present invention

Server can provide differentiated services for calls with users of different priorities by reserving virtual channels, ie MSC

The server reserves a part of virtual channels from the virtual channel. These reserved virtual channels are exclusively provided to users with predetermined priorities. Users without predetermined priorities can only occupy virtual channels outside the reserved virtual channels, that is, they do not have The number of virtual channels that a user with a predetermined priority can occupy is: The difference between the maximum number of virtual channels and the number of reserved virtual channels. After the reserved virtual channel is occupied, the MSC

The Server can also assign virtual channels outside the reserved virtual channel to users with predetermined priorities; however, after the virtual channels other than the reserved virtual channels are occupied, the MSC

The Server is not able to assign reserved virtual channels to users who do not have a predetermined priority. That is to say, the user corresponding to the call request or the handover request with the predetermined priority can use all the virtual channels of the wireless communication interface, and the user corresponding to the call request with the predetermined priority or the handover request can only use the reserved virtual channel. The external virtual channel enables a user with a predetermined priority to preempt the virtual channel that does not have the predetermined priority, thereby limiting the access of the low-priority user and ensuring the service quality of the high-priority user. The priority here can be set according to the Emlpp (enhanced Multi Level Precedence and Preemption service) feature.

[47] In the embodiment of the present invention, the virtual channel reservation is performed, and different virtual channels are reserved for users with different priorities. The implementation principle is basically the same as that described in the foregoing embodiment. More details.

[48] The method for limiting the call according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[49] Figure 1 is a schematic diagram of the networking of the MINI-IU-FLEX. In Figure 1, an MSC

Server corresponds to two MGWs, namely MGW1 and MGW2. MGW1 and MGW2 are respectively connected to the RNC. That is to say, one office direction corresponds to two media gateways. When MSC After the server receives the call request or the handover request, the MSC

The server obtains the number of available virtual channels of the MGW1 according to the maximum number of virtual channels of the MGW1 and the number of currently occupied virtual channels.

The server obtains the number of available virtual channels of the MGW2 according to the maximum number of virtual channels of the MGW2 and the number of currently occupied virtual channels. Then, MSC

Server compares the number of available virtual channels of MGW1 and the number of available virtual channels of MGW2. MSC Server can select the number of available virtual channels, MGW, MSC.

The server allocates a virtual channel to the user corresponding to the request from the virtual channel of the MGW with a large number of available virtual channels.

[50] MSC

After obtaining the number of available virtual channels of MGW1 and the number of available virtual channels of MGW2, the server can also determine the ratio of the number of available virtual channels of MGW1 to the maximum number of virtual channels of MGW1, and the number of available virtual channels of MGW2 and the maximum virtual number of MGW2. The ratio of the number of channels, and then, comparing the size of the two ratios, the MSC Server can select the MGW with a larger ratio, MSC

The server allocates a virtual channel to the user corresponding to the request from the virtual channel of the MGW with a large ratio.

[51] MSC

The server may also select the MGW according to the priority of the MGW1, the MGW2, and the number of available virtual channels, and allocate a virtual channel for the user corresponding to the call request or the handover request; for example, the MSC

The server rotates the media gateway according to the priority order of MGW1 and MGW2, and the MSC

The server determines that the number of available virtual channels of the selected media gateway reaches a predetermined domain value, MSC

The server allocates a virtual channel to the user of the incoming call from the virtual channel of the selected MGW; the MSC Server determines that the number of available virtual channels of the selected media gateway does not reach the predetermined domain value, and the MSC Server has the largest number of available virtual channels. A virtual channel is allocated to the user of the incoming call in the virtual channel of the MGW;

The server selects the media gateway according to the ratio of the maximum number of virtual channels of the MGW1 to the maximum number of virtual channels of the MGW2. For example, the maximum number of virtual channels of the MGW1 is 1000, and the maximum number of virtual channels of the MGW2 is 2000. For 1: 2, this 吋, if MSC

Server needs to allocate virtual channels for three calls, then MSC The server allocates a virtual channel for one of the above three calls from the virtual channel of the MGW1, the MSC

The Server allocates virtual channels from the virtual channel of MGW2 for the other two calls in the above call. There are various methods for the MSC Server to select a virtual channel for the user. The embodiment of the present invention is not limited to a specific implementation process for the user to select a virtual channel.

[52] When the bearing surface between RNC and MGW1 fails, MSC

The server can set the maximum number of virtual channels of MGW1 to the blocked state by using the maintenance command, such as set to 0. Thus, for RCN access call requests or handover requests, MSC

After the server selects the media gateway for it, it will not choose MGW1, which greatly reduces the call loss. When the failure of the bearing surface between R NC and MGW1 is recovered, MSC

The server can then set the maximum number of virtual channels of MGW1 to a normal value through the maintenance command to release its blocking state.

[53] MSC

Server can set all virtual channels of MGW1 as reserved virtual channels, so that users with predetermined priorities can use all virtual channels of MGW1 and MGW2, while users without predetermined priorities can only use virtual channels of MGW2. . MSC

The server can also set part of the virtual channel of MGW1 as the reserved virtual channel and set part of the virtual channel of MGW1 as the reserved virtual channel, so that users with predetermined priorities can use all virtual channels of MGW1 and MGW2 instead of Users with a predetermined priority can only use some of the virtual channels in MGW1 and MGW2. This limits the access of low-priority users and guarantees the quality of service for high-priority users.

2 is a flow chart of a method for restricting calls according to a first embodiment of the present invention.

[2] In FIG. 2, the UE (User Equipment) is a mobile call originator, and the UE sends a SETUP message to the MSC Server through the RNC, and the MSC Server receives the SETUP message, the MSC.

The server determines that the office direction of the SETUP message corresponds to multiple MGWs with available virtual channels, and selects the MGW with the largest number of available virtual channels from the plurality of MGWs, and the virtual channel of the MGW with the largest number of available virtual channels is The UE allocates a virtual channel. After allocating the virtual channel to the UE, the MSC Server replies to the UE with a CALL_PROCEEDING message and continues the subsequent call. deal with.

3 is a flow chart of a method for restricting calls according to a second embodiment of the present invention.

[3] In FIG. 3, the UE is a mobile call originator, and the UE sends a SETUP message to the MSC through the RNC.

Server, MSC Server receives SETUP message, MSC

After the server determines that the MGW corresponding to the office route of the SETUP message has no available virtual channel, the MSC Server refuses to allocate a virtual channel to the UE. After refusing to assign a virtual channel to the UE, the MSC

The Server replies to the UE with a DISCONNECT message to reject the UE's call.

4 is a flow chart of a method for restricting calls according to a third embodiment of the present invention.

[59] In Figure 4, the UE is the terminating party of the mobile call, and the UE sends a CALL_CONFIRMED message to the MSC Server through the RNC. MSC

The Server receives the CALL_CONFIRMED message transmitted by the UE, and the MSC

The server determines that the office direction of the CALL_CONFIRMED message corresponds to multiple MGWs with available virtual channels, and selects the MGW with the largest number of available virtual channels from the plurality of MGWs, and from the virtual channels of the MGW with the largest number of available virtual channels. The UE allocates a virtual channel. After assigning a virtual channel to the UE, the MSC

The Server replies to the UE with an ALERTING message and proceeds with subsequent call processing.

FIG. 5 is a flowchart of a method for restricting call according to a fourth embodiment of the present invention.

[61] In FIG. 5, the UE is a terminating party of the mobile call, and the UE sends a CALL_CONFIRMED message to the MSC Server through the RNC. The MSC Server receives the CALL_CONFIRMED message transmitted by the UE, and the MSC Server determines that the MGW corresponding to the office direction of the CALL_CONFIRMED message has no available virtual channel, MSC

The server refuses to allocate a virtual channel to the UE. After refusing to assign a virtual channel to the UE, the MSC

The Server replies to the UE with a DISCONNECT message to reject the UE's current call.

6 is a flowchart of a call restriction method according to a fifth embodiment of the present invention.

[63] In Figure 6, the UE's call requires an intra-office handover. Source RNC/BSC to MSC

Server sends a RELOCATION message or HANDOVER

REQUIRED message, MSC

The server receives the message sent by the source RNC/BSC, the MSC The server determines that the destination office direction of the message corresponds to multiple MGWs with available virtual channels, and selects the MGW with the largest number of available virtual channels from the plurality of MGWs, and from the virtual channels of the MGW with the largest number of available virtual channels. The UE allocates a virtual channel. After allocating the virtual channel to the UE, the MSC Server sends a RELOCATION_REQUEST message to the destination RNC and continues the subsequent call processing.

7 is a flow chart of a method for restricting calls according to a sixth embodiment of the present invention.

[65] In Figure 7, the UE's call requires an intra-office handover. Source RNC/BSC to MSC

Server sends a RELOCATION message or a HANDOVER REQUIRED message, MSC

Server receives the message sent by the source RNC/BSC, MSC

After determining that there is no virtual channel available to the corresponding multiple MGWs in the destination office of the message, the MS C Server refuses to allocate a virtual channel to the UE. After refusing to assign a virtual channel to the UE, the MSC Server replies to the source RNC/BSC with RELOCATION PREPARATION

FAILURE (relocation preparation failed) message, or reply to the source RNC/BSC HANDOVER REQUIRED REJECT message to reject the intra-office handover of the UE's current call.

8 is a flow chart of a method for restricting calls according to a seventh embodiment of the present invention.

[67] In FIG. 8, the call of the UE needs to perform inter-office handover, where the inter-office handover includes: switching from the source office to the target office route, and the inter-office handover further includes: switching back to the target office direction, and then switching back To the above source direction. M SC

Server-B receives the MAP-PREPARE-HANDOVER message or receives the MAP-P REPARE-SUBSEQUENT message. MSC

Server-B determines that the destination office of the message corresponds to multiple MGWs with available virtual channels, selects the MGW with the largest number of available virtual channels from the plurality of MGWs, and selects the virtual channel of the MGW with the largest number of available virtual channels. A virtual channel is allocated for this handover of the UE call. After allocating virtual channels to the UE, the MSC

Server-B sends a RELOCATION_REQUEST message to the destination RNC and continues the subsequent call processing.

9 is a flow chart of a method for restricting calls according to an eighth embodiment of the present invention.

[69] In FIG. 9, the call of the UE needs to perform interoffice handover, and the interoffice handover here includes: switching from the source office to the The target office direction; the inter-office handover further includes: after switching to the target office direction, switching back to the source direction. The MSC where the UE is currently located.

Server-B receives the MAP-PREPARE-HANDOVER message or receives the MAP-PREPARE-SUB SEQUENT message. MSC

Server-B determines that there is no virtual channel available for the corresponding MGWs in the destination office of the message. MSC Server

-B refuses to allocate a virtual channel for this handover of the UE call. After refusing to allocate virtual channels, MSC Server-B returns MAP-U-ABORT to reject the inter-office handover of the UE's current call.

10 is a flow chart of a method for restricting calls according to a ninth embodiment of the present invention.

[71] In Figure 10, the UE needs to make an interoffice call. The GMSC (gateway) where the UE is currently located receives the IAM message. The GMSC determines whether the outgoing office of the message has a virtual channel available to the corresponding MGW. After determining that the virtual channel is available, the GMSC allocates a virtual channel to the UE of the interoffice call, and sends an IAM message to the peer office. To continue the subsequent call processing; after determining that there is no virtual channel available, the GMSC refuses to allocate a virtual channel for the UE of the inter-office call to reject the current inter-office call of the UE.

[72] The call restriction device provided by the embodiment of the present invention will be described below with reference to FIG.

[73] In FIG. 11, the call restriction device provided by the embodiment of the present invention is provided with a storage module and a call restriction module, and the call restriction device is further provided with a setting module, or optionally, an occlusion module, or The selected settings are the setting module and the blocking module. The call restriction device in the embodiment of the present invention may be disposed in the mobile switching device or may be set independently of the mobile switching device. The call restriction control of the call restriction device may be a wireless communication interface for communication between the MG W and other network entities. The wireless communication interface can be an IP interface or a non-IP interface. The wireless communication interface can be an IU interface, and can be an Nb interface, and can be an A interface or a 27 interface. Specifically, it is as described in the above method embodiment.

[74] Hereinafter, a call restriction device according to an embodiment of the present invention will be described by taking a GSM and UMTS system as an example.

[75] The storage module is mainly used to store the maximum number of virtual channels of the MGW's IP wireless communication interface and the number of virtual channels currently occupied. The maximum number of virtual channels in the storage module can be set by the setup module. The setup module can configure the maximum number of virtual channels stored in the storage module through maintenance commands. Set the maximum number of virtual channels in the configuration module. You can consider the bandwidth of the wireless communication interface on the MGW. Of course, the setting module can also consider other factors when configuring the maximum number of virtual channels. Consider the processing power of MGW and so on. The bandwidth of the wireless communication interface on the MGW is the bandwidth between the RNC and the MGW, and the bandwidth between the office route and the MGW. The bandwidth between the office route and the MGW can be the bandwidth between the two MGWs.

[76] The setting module can dynamically adjust the maximum number of virtual channels of the wireless communication interface on the MGW according to the actual situation of the network, for example, the setting module dynamically adjusts the maximum virtual channel number of the wireless communication interface on the MGW according to the assigned success rate in the network; Set the module according to IP

QOS dynamically adjusts the maximum number of virtual channels on the wireless communication interface on the MGW; also, the setting module can be based on the assigned success rate and IP

QOS dynamically adjusts the maximum number of virtual channels on the wireless communication interface on the MGW. Of course, the setup module can also dynamically adjust the maximum number of virtual channels based on other parameters in the network. When an MSC

The server corresponds to multiple MGW ports, and the setting module can set the maximum number of virtual channels for each wireless communication interface on each MGW. Specifically, it is as described in the above method embodiment.

[77] The call restriction module is mainly used in MSC

After receiving the handover request or the call request, the server determines whether the number of virtual channels and the maximum number of virtual channels that are currently occupied meets the predetermined condition. If the predetermined condition is met, the call restriction module allocates a virtual channel for the user corresponding to the request, if not, The predetermined condition, the call restriction module does not allocate a virtual channel for the user corresponding to the request. The predetermined condition here may be: whether the number of virtual channels currently occupied reaches the maximum number of virtual channels; that is, if the number of virtual channels currently occupied has reached the maximum number of virtual channels, the call restriction module does not allocate virtual space for the user corresponding to the request. If the number of virtual channels currently occupied does not reach the maximum number of virtual channels, the call restriction module allocates virtual channels for users corresponding to the request. The predetermined condition here may also be other forms, such as whether the ratio of the number of virtual channels currently occupied and the maximum number of virtual channels reaches a predetermined value, and the like. The number of the virtual channels that are currently occupied and the number of the virtual channels that are not currently occupied are two concepts. Therefore, the embodiment of the present invention can also implement the call restriction by determining the number of virtual channels that are not currently occupied and the maximum number of virtual channels. In the description of the following embodiments, the predetermined condition is an example of whether the number of virtual channels currently occupied has reached the maximum number of virtual channels, and the call restriction apparatus of the embodiment of the present invention will be described.

[78] After the virtual call channel is assigned to the user, the call restriction module needs to adjust the number of currently occupied virtual channels stored in the storage module, and the call restriction module detects the MSC. After the server releases the call, the number of currently occupied virtual channels stored in the storage module needs to be adjusted accordingly. In the embodiment of the call restriction device of the present invention, the number of currently occupied virtual channels in the storage module may be related to the number of access users, such as one access user permanently occupying one virtual channel number, or a fixed number of virtual channel numbers. The number of currently occupied virtual channels in the storage module can also be related to the radio access bearer of the call, such as one radio access bearer of the call occupying a virtual channel number.

[79] When an MSC

The server corresponds to multiple MGW ports. The storage module stores the maximum number of virtual channels and the number of virtual channels currently occupied by the wireless communication interface on each MGW. In this networking scenario, the call restriction module can be selective for the MSC.

The user corresponding to the call request or the handover request received by the server allocates a virtual channel. Below for an M SC

In the case that the server corresponds to multiple MGWs, the process of the restricted call module assigning a virtual channel to the user of the incoming call is described.

[80] MSC

The server receives the incoming call, and the call restriction module determines the MGW corresponding to the office route of the incoming call. If the office route of the incoming call corresponds to only one MGW, the call restriction module determines the currently occupied virtual reality of the MGW stored in the storage module. Whether the number of channels reaches the maximum number of virtual channels of the wireless communication interface on the MGW. If the maximum number of virtual channels is not reached, the call restriction module allocates a virtual channel for the user of the incoming call from the virtual channel of the corresponding MGW; The maximum number of virtual channels, the call restriction module refuses to allocate virtual channels for users of the incoming call.

[81] When the call restriction module determines that the office route of the incoming call corresponds to multiple MGWs, the call restriction module determines whether the number of currently occupied virtual channels of the plurality of MGWs stored in the storage module does not reach the maximum virtual channel. The number of MGWs that are currently occupied by the number of virtual channels that do not reach the maximum number of virtual channels is multiple, and the call restriction module selects one MGW from the plurality of MGWs that have never reached the maximum number of virtual channels according to a predetermined rule, and selects from the selected ones. A virtual channel is allocated to the user of the incoming call in the virtual channel of the MGW; if the number of the currently occupied virtual channels does not reach the maximum number of virtual channels, the call restriction module directly calls the incoming call from the virtual channel of the MGW. The user is assigned a virtual channel. The number of currently occupied virtual channels of multiple MGWs corresponding to the limit of the incoming call reaches the maximum number of virtual channels. The module refuses to allocate a virtual channel for this incoming call.

[82] The predetermined rules used by the above restriction calling module may be one or more of the following: priority of the MGW, maximum number of available virtual channels, highest proportion of available virtual channels, round selection, random selection, and the like. The predetermined rule may be any rule that selects one MGW from a plurality of MGWs. Embodiments of the invention do not limit the specific manifestation of the predetermined rules.

In the call restriction device of the embodiment of the present invention, the occlusion module can set the virtual channel to the occlusion state according to specific requirements, such as a failure in the bearing surface, or temporarily stop using a certain wireless communication interface due to detection or the like. , the virtual channel of the wireless communication interface can be set to the occlusion state. There are various methods for the occlusion module to set the virtual channel to the occlusion state. For example, the occlusion module sets the maximum number of virtual channels of the wireless communication interface stored in the storage module to zero, and the occlusion module stores the wireless communication interface stored in the storage module. The number of currently occupied virtual channels is set to the maximum number of virtual channels, and the blocking module sets the maximum number of virtual channels stored in the storage module to a specific value and the like. Embodiments of the present invention do not limit the specific representation of the occlusion module to set the virtual channel to the occluded state. After the occlusion module sets the virtual channel of the wireless communication interface to the occlusion state, the call restriction module no longer allocates a virtual channel from the virtual channel of the wireless communication interface for the user corresponding to the call request or the handover request.

[84] The call restriction device of the embodiment of the present invention can provide differentiated services for calls with users of different priorities by using a reserved virtual channel, that is, the storage module stores information of a part of the reserved virtual channels, and the call restriction module will These reserved virtual channels are exclusively provided to users with predetermined priorities, so that users who do not have a predetermined priority can only occupy virtual channels outside the reserved virtual channels. The priority here can be the priority set according to the Emlpp feature. The storage module may also store information of different reserved virtual channels corresponding to users with different priorities. The details are as described in the above method embodiments. It will not be described in detail here.

[85] In the foregoing embodiments, the GSM and UMTS systems are mainly described as an example. The implementation of the technical solutions in the other systems is basically the same as the foregoing description, and is not described in this example. Description.

As can be seen from the description of the foregoing embodiments, the implementation of the present invention achieves an effective limitation on the number of access users through the virtual channel, and ensures the quality of service of the access user. The embodiment of the present invention can actively control the number of access users according to the maximum number of virtual channels, and can implement the call after the user has not made a call. The user's request avoids dropped calls. The embodiment of the present invention can dynamically adjust the maximum number of virtual channels according to the actual situation of the network, thereby further ensuring the quality of service of the access users. The embodiment of the present invention can perform maintenance on a virtual channel, such as blocking a virtual channel through a maintenance command, so that the virtual channel does not affect the implementation process of the call in a faulty state. The embodiment of the present invention ensures the quality of service of high priority users by reserving virtual channels. The embodiment of the present invention enhances the flexibility of virtual channel allocation by selecting a media gateway according to a predetermined rule such as the number of available virtual channels, the priority of the media gateway, and the like, and assigning a virtual channel to the user of the incoming call according to the selected media gateway. The allocation of channels can be set according to the actual situation of the network. For example, the virtual channel of the media gateway with superior performance should be used to allocate virtual channels for users of incoming calls. Therefore, the technical solution provided by the embodiment of the present invention improves the service quality of the access user.

While the invention has been described by the embodiments of the invention, it will be understood that

Claims

Claim

[1] 1. A method for limiting a call, which is characterized in that a maximum number of virtual channels corresponding to a media gateway is set, and the method includes the following steps:

Receiving a handover request or a call request, determining whether the number of virtual channels currently occupied and the maximum number of virtual channels meet the predetermined condition, or determining whether the number of virtual channels currently not occupied meets the predetermined condition;

If the predetermined condition is met, the virtual channel is allocated to the user corresponding to the request; if the predetermined condition is not met, the virtual channel is refused to be allocated to the user corresponding to the request.

[2] The method according to claim 1, wherein the method further comprises: counting the number of virtual channels currently occupied according to the radio access bearer corresponding to the accessed user; or according to the access The number of users counts the number of virtual channels currently occupied.

[3] The method according to claim 1, wherein the method further comprises: configuring a maximum number of virtual channels according to a bandwidth of the media gateway; and/or, according to the acquired assignment failure information and/or IP

The QOS information dynamically adjusts the maximum number of virtual channels.

[4] The method of claim 1, wherein the virtual channel corresponding to the media gateway is provided with a reserved virtual channel, and the step of allocating a virtual channel for the user corresponding to the request includes: A virtual channel is assigned to a user with a predetermined priority from the reserved virtual channel.

[5] 5. The method according to claim 1, wherein the number of the media gateways is one or more, and when the number of the media gateways is multiple, the maximum virtual channel is set for each media gateway. Number, and the method includes:

Determining, by the mobile switching device, the office direction of the request, after determining that the requested office direction corresponds to a plurality of media gateways that meet a predetermined condition, the mobile switching device meets a predetermined condition from the office direction according to a predetermined rule. The media gateway is selected from the media gateway, and the virtual channel is allocated to the user corresponding to the request according to the selected media gateway.

[6] The method according to any one of claims 1 to 5, wherein the method further comprises: the virtual channel of the media gateway is set to an occlusion state, and the virtual channel is occluded Status 吋, refuse to assign a virtual channel to the user corresponding to the request.

[7] 7. The method according to any one of claims 1 to 5, wherein the predetermined strip The components include: The number of virtual channels currently occupied does not reach the maximum number of virtual channels, or the ratio of the number of virtual channels currently occupied to the maximum number of virtual channels does not reach a predetermined value.

[8] 8. A call restriction device, wherein the device comprises:

a storage module, configured to store a maximum number of virtual channels of the media gateway, and a number of virtual channels currently occupied;

The call restriction module is configured to determine, according to the information stored in the storage module, whether the number of virtual channels currently occupied and the maximum number of virtual channels meet the predetermined condition, or determine whether the number of virtual channels that are not currently occupied meets a predetermined condition; After the condition, the virtual channel is allocated to the user corresponding to the handover request or the call request, and after determining that the predetermined condition is not met, the virtual channel is not allocated to the user corresponding to the handover request or the call request.

[9] 9. The device according to claim 8, wherein the device further comprises:

a setting module, configured to configure a maximum number of virtual channels stored in the storage module according to a bandwidth of the media gateway; and/or, used to obtain the assignment failure information and/or IP

The QOS information, and dynamically adjusts the maximum number of virtual channels stored in the storage module according to the obtained information.

[10] The device of claim 8, wherein the device further comprises: an occlusion module, configured to set the maximum number of virtual channels stored in the storage module to an occlusion state, and the call restriction module is The virtual channel is in the occlusion state 拒绝, and the virtual channel corresponding to the user corresponding to the request is refused.

[11] 11. Apparatus according to claim 8 or 9 or 10, wherein the apparatus is provided in the mobile switching device or independently of the mobile switching device.