CN1323561C - Method for realizing call switching between specific service regions in network - Google Patents

Abstract

The invention discloses a method for switching calls between specific service areas in a network. The method includes the following steps: Step A: a control device in the network sends a message to a location information center LIC, and the message includes the cell number where the switch occurs Identifier ID; step B: LIC judges whether the current handover is a handover between specific service areas according to the ID of the handover cell in the message received in step A, using the definition content of the specific service area stored on the LIC , if yes, then execute step C; otherwise, implement handover according to the general handover method between cells in the network, and then end the call handover process; step C: LIC selects from the handover strategy saved by the LIC according to the current handover After obtaining the switching strategy, the LIC sends the switching strategy to the control device, and the control device implements call switching according to the switching strategy.

Description

A method for realizing call switching between specific service areas in the network

technical field

The invention belongs to the field of mobile network technology, in particular to a method for realizing call switching between specific service areas in the network.

Background technique

In a mobile communication network, it mainly includes a base station system and a core network system. The base station system generally includes a base station and a base station controller. Each base station covers a cell in the mobile network. A cell covered by the base station is called a cell. When a user When entering another cell from one cell during a call, a call handover will occur. The call handover will switch the user's air call link from one cell to another correspondingly under the cooperation of the user's mobile station and the mobile communication network. district.

However, the cell in the above mobile communication network only refers to the area that the cell can actually cover. For the user, this area often has no practical significance related to his work and life. In order to make the cells in the mobile communication network have practical significance and meet the actual needs of users in different areas, the concept of a specific service area is currently proposed. The specific service area is composed of one or more cells, and multiple cells may be geographically Cells that are not adjacent in location are logically connected to form a specific service area through the definition of the specific service area. The definition of a specific service area can be based on the individual definition of the user, or it can be a unified definition based on the network; for example, according to the user's own needs, it can define similar office areas, commercial areas, residential areas, conference areas, and sports areas. Similar to specific service areas such as rest areas, specific service areas that meet the unified definition requirements of the network can also be defined. When the user's mobile station moves between these specific service areas, handover between specific service areas will occur, which is different from general cell handover between cells in the mobile communication network.

Likewise, the above-mentioned specific service areas are also applicable for wireless local area networks (WLAN). For a wireless IP network, the basic structure of WLAN is to use access point (AP) and access control unit (AC) to complete the wireless access of user terminals, and to form an IP transmission network through network control and connection equipment. Each AP constitutes a different cell in the WLAN. Using the definition of a specific service area, it is possible to logically link cells that may not be geographically adjacent to each other into a specific service area. The definition of the specific service area is the same as the above mobile A specific service area in a communication network is defined in the same way. Similarly, when the user's mobile station moves between these specific service areas, handover between specific service areas will occur, which is different from general cell handover between AP cells in WLAN.

In the prior art, whether it is inter-cell call handover in a mobile communication network or call handover between different APs in a WLAN, only general inter-cell call handover in the network can be realized. Handover, since the user's mobile station needs to switch the service network when switching from one specific service area to another specific service area, therefore, the handover call methods in the prior art obviously cannot meet the requirements of different specific service areas. Therefore, when a user moves from one specific service area to another specific service area, the call switching between different specific service areas cannot be realized, so that the service to the user may be interrupted.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for switching calls between specific service areas in the network, which can realize call switching between specific service areas, thereby ensuring that users move from one specific service area to another specific service area. When the area is closed, the service to the user can still be maintained.

In order to achieve the above object, the present invention adopts a method for switching calls between specific service areas in the network, the method comprising the following steps:

Step A: The control device in the network sends a message to the location information center LIC, the message includes the identity of the cell to be handed over;

Step B: The LIC judges whether the current handover to take place is a handover between specific service areas according to the identity of the handover cell in the message received in step A, and by using the definition content of the specific service area stored on the LIC, and if so , then execute step C; otherwise, implement call switching according to the switching method between general cells in the network, and then end the call switching process;

Step C: The LIC obtains a switching strategy from the switching strategies stored in the LIC according to the current switching strategy, and then, the LIC sends the switching strategy to the control device, and the control device implements call switching according to the switching strategy.

Wherein, in step A, before the control device sends a message to the location information center, the method further includes:

The control device obtains the user's subscription information from the user's home location register HLR, judges according to the subscription information whether the user has applied for the current specific service in the two cells before and after the handover, and if so, executes the sending message Otherwise, send a reminder message to the user, and then end the call switching process.

Wherein, the determination in step B whether the current handover to be performed is a handover between specific service areas is as follows:

According to the identity of the cell to be handed over at present, search for the specific service area corresponding to the two cells before and after the handover in the definition content of the specific service area, and judge whether the two specific service areas are the same, if not, confirm the current handover It is a handover between specific service areas; otherwise, confirm that the current handover is not a handover between specific service areas.

Wherein, the network is a mobile communication network, the control equipment in the network is a base station controller BSC, the cell in the network is a base transceiver station BTS cell, and the identity of the cell is Cell ID, and the step A include:

The BSC receives the signals reported by the two BTS cells that are currently to be handed over, and the signal includes the Cell IDs of the two cells that are currently to be handed over, and then the BSC sends the Cell IDs of the two cells to the LIC through a message.

Wherein, the network is a wireless local area network WLAN, the control device in the network is an access control point AC, the cell in the network is an access point AP cell, and the identifier of the cell is an AP ID, and the step A include:

The AC receives the signals reported by the two AP cells to be handed over, and the signal includes the AP IDs of the two cells where the handover occurs, and then the AC sends the AP IDs of the two cells to the LIC through a message.

Wherein, in step B, if the handover to be occurred is a handover between specific service areas, the method further includes:

The LIC sends a reminder message to the mobile station of the user through the network to remind the user that handover between specific service areas is currently being performed.

Wherein, the switching strategy includes:

The switching condition of a specific service area, and the preferred network corresponding to the switching condition.

Wherein, the switching condition at least includes a specific service area name.

It can be seen that in the present invention, when a user switches from one cell in the network to another cell, it can be judged according to the predefined content of the specific service area whether the cell switch to be performed is a handover between specific service areas, and , can find out the handover strategy corresponding to the handover between the specific service areas, and realize the call handover process between the specific service areas according to the policy, so that when the user moves from a specific service area to another specific service area, still Specific services can be maintained for users. Moreover, when switching between specific service areas occurs or switching between specific service areas cannot be realized, the present invention will also send reminder information to the user to notify the user.

Description of drawings

Fig. 1 is a networking diagram of a mobile communication network in the present invention.

Fig. 2 is a flow chart of realizing switching between specific service areas in an embodiment of the present invention.

FIG. 3 is a network diagram of a WLAN in the present invention.

Fig. 4 is a flow chart of realizing switching between specific service areas in another embodiment of the present invention.

Detailed ways

The present invention is a method for switching between specific service areas in a network. The method utilizes the specific service area definition content stored in a newly added location information center (LIC) in the network to judge whether the cell switching to be occurred in the current network is It is a handover between specific service areas, if so, according to the current handover between specific service areas to be occurred, find the corresponding handover policy in the handover policy saved in the LIC, and realize the handover between specific service areas according to this policy Call handoff process.

The present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1:

Referring to the mobile communication network networking diagram shown in Figure 1, in this mobile communication network, base transceiver station (BTS) sub-district 121,122 and 123 are defined as specific service area 1, wherein, BTS sub-district 121 and BTS sub-district 122 and 123 is not geographically adjacent; meanwhile, BTS cells 124, 125 and 126 are defined as specific service area 2, wherein, BTS cell 124 is not geographically adjacent to BTS cells 125 and 126; The ID number of the corresponding BTS cell in the area is stored in the newly added LIC as shown in Figure 1. This LIC can be implemented independently by hardware. Set the corresponding intelligent service to realize LIC. At this time, the SCP to realize the LIC service is equivalent to the LIC in FIG. 1 . For the specific service area defined above, when the user mobile station moves in the area where the BTS cells 121-126 are located, switching of the specific service area may occur. Referring to Fig. 2, the present invention specifically realizes the specific service area by the following method Call switching:

Step 200: when the user mobile station is about to switch between any two cells in the BTS cells 121-126, the base station controller (BSC) receives signals reported by the BTSs in the two cells to be switched, and the signal includes the ID number of the BTS cell;

Step 201: After the BSC receives the reported signal, it sends a service request to the MSC shown in Figure 1. After the MSC receives the service request, it obtains the subscription information of the user from the user's home location register (HLR), and according to the subscription The information judges whether the user has applied for the current specific service in the two cells before and after the handover to take place, if yes, then perform step 202; otherwise, because the cell where the mobile station of the user is switched cannot provide the current specific service, As a result, the current specific service is interrupted. Therefore, the MSC sends a reminder message to the user to remind the user that the specific service will be interrupted due to the handover of the cell, and then ends the handover call process;

Step 202: The BSC sends a message to the LIC, which includes the ID numbers of the two BTS cells to be handed over at present;

Step 203: The LIC receives the message sent by the BSC in step 202, and judges whether the current pending BTS cell handover is a handover between specific service areas according to the ID number of the cell to be handed over contained in the message, and if so , then execute step 204; otherwise, realize handover according to the handover method between BTS cells in the mobile communication network, and then end the handover call process;

In the embodiment of the present invention, it is assumed that the specific service area 1 is an office area, the specific service area 2 is a meeting area, the IDs of the BTS sub-districts in the specific service areas 1 and 2 are Cell IDs, and the Cell IDs of the BTS sub-districts 121-123 are respectively Be: 1, 2 and 3, the Cell ID of BTS community 124～126 is 8, 9 and 10 respectively; The table is stored in the LIC, and the LIC can find out the specific service areas to which the two cells to be handed over belong to according to the cell ID number in the message sent from the BSC, combined with the content in the specific service area definition table, and determine the specific service area. Whether the two specific service areas are the same, if not, it is determined that the current BTS cell switch to be performed is a switch between specific service areas, otherwise, it is determined that the current BTS cell switch to be performed is not a switch between specific service areas;

Specific service area name Cell ID Workspace 1 Workspace 2 Workspace 3 conference area 8 conference area 9 conference area 10

Table 1

Step 204: The LIC finds the corresponding handover strategy according to the handover between the BTS cells to take place at present, and the LIC sends the handover strategy to the BSC, and the BSC completes the corresponding call handover according to the handover strategy; wherein, in this step, the LIC A handover reminder is also sent to the user's mobile station through the mobile communication network to remind the user that a handover between specific service areas has currently occurred;

The above switching strategy is stored in the switching strategy definition table, and the switching strategy includes at least the switching condition and the service-providing network corresponding to the switching condition, wherein the switching condition includes at least the name of the specific service area after switching, and can further include, for example, The switching conditions of the mobile station, time period, etc., and the network providing the service may include the preferred network providing the service and other alternative networks; in the embodiment of the present invention, the switching condition in the switching strategy definition table includes: a specific service area , the start/end time, and the handover mobile station, refer to the handover strategy definition table shown in Table 2, in which the corresponding handover strategies are set for handover to the office area and the conference area, where handover strategy 1 means : When the mobile station MS1 switches to the office area within the time period of 9:00～18:00, WLAN is preferred as the network for realizing specific services; switching strategy 2 means: when the mobile station MS2 switches between 7:00～12:00 During the period of time, when switching to the conference area, the Bluetooth (BlueTooth) network is preferred as the network for realizing specific services; switching strategy 3 means: when the mobile station MS1 switches to the conference area within the time period of 18:01-8:59 , the BlueTooth network is preferred as the network for realizing specific services;

serial number Specific service area name mobile station Starting time End Time preferred network 1 Workspace MS1 9:00 18:00 WLAN 2 conference area MS2 7:00 12:00 BlueTooth 3 conference area MS1 18:01 8:59 BlueTooth

Table 2

Wherein, in this step 204, the BSC can use mature methods in the prior art to implement call switching between specific service areas according to the obtained switching strategy. This kind of call switching belongs to those skilled in the art without detailed description. method that can be realized.

Embodiment 2: This embodiment is used to describe the method for realizing call switching between different specific service areas when the present invention is applied to a WLAN. Referring to the networking diagram shown in FIG. 3, in this WLAN, the AP cells 321, 322 and 323 is defined as a specific service area 3, wherein the AP cell 321 is not geographically adjacent to the AP cells 322 and 323; at the same time, the AP cells 324, 325 and 326 are defined as a specific service area 4, wherein the BTS cell 324 and The BTS cells 325 and 326 are not geographically adjacent; the ID numbers of the AP cells included in the above-defined specific service area are saved in the newly added LIC as shown in FIG. 3 . For the specific service area defined above, when the mobile station of the user moves in the area where the AP cells 321-326 are located, it may cause the switching of the specific service area. Referring to FIG. 4, the present invention specifically realizes the specific service area by the following method Call switching:

Step 400: When the mobile station of the user is about to switch between any two cells in the AP cells 321-326, the AC receives the signals reported by the APs in the two cells to be switched, and the signal includes the The ID number of the AP cell AP ID;

Step 401: After the AC receives the reported signal, it obtains the subscription information of the user from the user's home location register (HLR) in the WLAN, and judges whether the user has applied for the current subscription in the two cells before and after the handover according to the subscription information. If yes, then perform step 402; otherwise, send a reminder message to the user to remind the user that the specific service will be interrupted due to the handover of the cell, and then end the call handover process;

Step 402: the AC sends a message to the LIC, the message includes the ID numbers of the two AP cells currently to be switched;

Step 403: The LIC receives the message sent by the AC in step 402, and judges whether the current pending AP cell handover is a handover between specific service areas according to the ID number of the cell to be handed over contained in the message. , then perform step 404; otherwise, implement switching according to the switching method between AP cells in the WLAN network, and then end the call switching process;

In the embodiment of the present invention, it is assumed that the specific service area 3 is an office area, and the specific service area 4 is a conference area, the AP IDs of the AP cells 321-323 are respectively: 31, 32 and 33, and the AP IDs of the AP cells 324-326 are respectively are 38, 39 and 30; the definition of the above specific service area is stored in the specific service area definition table shown in Table 3, and the specific service area definition table is stored in the LIC, and the LIC can be based on the specific service area definition table Find out the specific service areas to which the two cells to be handed over belong to, and judge whether the two specific service areas are the same. , it is determined that the current AP cell handover to be occurred is not a handover between specific service areas;

Specific service area name AP ID Workspace 31 Workspace 32 Workspace 33 conference area 38 conference area 39 conference area 30

table 3

Step 404: The LIC finds the corresponding handover strategy according to the handover between the AP cells to take place at present, the LIC sends the handover strategy to the AC, and the AC completes the corresponding call handover according to the handover strategy; wherein, in this step, the LIC A handover reminder is also sent to the mobile station of the user through the WLAN to prompt the user that a handover between specific service areas has occurred currently;

Wherein, the above handover strategy is stored in the handover strategy definition table. In the embodiment of the present invention, the handover strategy definition table includes the specific service area, the start/end time, and the handover conditions of the mobile station where handover occurs, see Table 4 Handover strategy definition table, in which the corresponding handover strategies are respectively set for switching to the office area and conference area, wherein, handover strategy 4 means: when the mobile station MS1 is in the time period from 9:00 to 18:00, handover When going to the office area, wireless high-fidelity (WLL) is preferred as the network for realizing the service; switching strategy 5 means: when the mobile station MS2 switches to the conference area within the time period of 7:00-12:00, the BlueTooth network is preferred as the network. The network that realizes the service; handover strategy 6 means: when the mobile station MS1 switches to the conference area within the time period of 18:01～8:59, the BlueTooth network is preferred as the network to realize the service;

serial number Specific service area name mobile station Starting time End Time preferred network 4 Workspace MS1 9:00 18:00 WLL 5 conference area MS2 7:00 12:00 BlueTooth 6 conference area MS1 18:01 8:59 BlueTooth

Table 4

Wherein, in this step 404, the AC can use mature methods in the prior art to implement call handover between specific service areas according to the obtained handover strategy. Achievable methods.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (8)

1, a kind ofly realize the switch call method between regions of particular service in the network, it is characterized in that this method may further comprise the steps:

Steps A: the control appliance in the network sends message to positional information center LIC, comprises the sign of sub-district to be switched in this message;

Step B:LIC is according to receiving the sign of the switching cell in the message in steps A, utilization is kept at the definition content of the regions of particular service on the LIC, judges that whether switching current to be taken place is the switching between regions of particular service, if, execution in step C then; Otherwise, realize calling out switching, terminated call handoff procedure then according to the changing method of the general minizone in the described network;

Step C:LIC obtains switchover policy according to switching current to be taken place in the switchover policy that LIC preserved, then, LIC sends to described control appliance with this switchover policy, and this control appliance is realized calling out according to this switchover policy and switched.

2, method according to claim 1 is characterized in that, in the steps A, before the positional information center sent message, this method further comprised at described control appliance:

Described control appliance obtains this user's CAMEL-Subscription-Information from user's attaching position register HLR, judge according to this CAMEL-Subscription-Information whether the user has all applied for current special services in two sub-districts of switching front and back, if, then carry out the step of described transmission message, otherwise, send reminder message to the user, then the terminated call handoff procedure.

3, method according to claim 1 is characterized in that, judges described in the step B whether switching current to be taken place is switching between regions of particular service:

Sign according to sub-district current to be switched, in the definition content of regions of particular service, search two pairing regions of particular service in sub-district before and after switching, judge whether these two regions of particular service are identical, if it is inequality, then confirm the current switching that switches between regions of particular service, otherwise, confirm that current switching is not the switching between regions of particular service.

4, method according to claim 1, it is characterized in that described network is a mobile communications network, the control appliance in the described network is a base station controller BSC, and the sub-district in the described network is base transceiver station BTS sub-district, described sub-district be designated Cell ID, described steps A comprises:

BSC receives two signals that the BTS sub-district reports current to be switched, and comprises the Cell ID of two sub-districts current to be switched in this signal, and then, BSC sends to LIC with the Cell ID of these two sub-districts by message.

5, method according to claim 1, it is characterized in that described network is WLAN (wireless local area network) WLAN, the control appliance in the described network is access control point AC, and the sub-district in the described network is access point AP sub-district, described sub-district be designated AP ID, described steps A comprises:

AC receives two signals that the AP sub-district reports to be switched, and comprises the AP ID of two sub-districts that switch in this signal, and then, AC sends to LIC with the AP ID of these two sub-districts by message.

6, method according to claim 1 is characterized in that, among the step B, if the switching that switches between regions of particular service described to be taken place, this method further comprises:

LIC sends to user's travelling carriage by described network and reminds the current reminder message switched between regions of particular service of carrying out of user.

7, method according to claim 1 is characterized in that described switchover policy comprises:

The switching condition of regions of particular service, and the preferred network corresponding with this switching condition.

8, method according to claim 7 is characterized in that described switching condition comprises the regions of particular service title at least.

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