CN101217717B - A method of message sending under multi-signaling configuration of base station controller - Google Patents
A method of message sending under multi-signaling configuration of base station controller Download PDFInfo
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- CN101217717B CN101217717B CN2008100010332A CN200810001033A CN101217717B CN 101217717 B CN101217717 B CN 101217717B CN 2008100010332 A CN2008100010332 A CN 2008100010332A CN 200810001033 A CN200810001033 A CN 200810001033A CN 101217717 B CN101217717 B CN 101217717B
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Abstract
The present invention discloses a method for sending messages under the multi-signaling allocation of a base station controller, which comprises the steps that: (1) each signaling point of the base station controller is connected with an office direction and a preferred sending office direction is allocated to the messages sent of each location area number under the base station controller; (2) a mobile exchange center sends messages to the base station controller by each signaling point; (3) the base station controller receives the messages and obtains the location area numbers carried by the messages, then sends the messages to a base station transceiving station corresponding to the base station controller through the preferred sending office direction corresponding to the location area numbers. Compared with the prior art, the invention has the advantages that the BSC can filter repeat paging messages, reduce loads of the system and improve operating efficiency of the system under the multi-signaling allocation situation, thus fully achieving the aim of multi-signaling expanding capacity and bandwidth.
Description
Technical field
What the present invention relates to is in the mobile communication system, by behind a plurality of number 7 signalings of single BSC (Base StationController, base station controller) network element deploy, thereby promotes the method for the capacity of single BSC.
Background technology
In the present mobile communication system, especially the single BSC network element in CDMA (Code Division Multiple Access, the code division multiple access) mobile communication system according to the requirement of operator, develops towards the jumbo direction of high integration always.Because single BSC NE capacity is big more, the scope of its covering is just wide more, and what make that the mobile subscriber does in very big geographic range all is the soft handover of BSC inside, thereby improves network performance; Simultaneously, single BSC NE capacity is big more, and the resource sharing degree of BSC inside is also big more, and this can reduce the construction cost of operator.On the other hand, single BSC NE capacity is big more, and it is just few more to cover the required BSC network element number of the CDMA mobile communication system of certain geographic range, like this, has also reduced the maintenance cost of operator.
The capacity of single BSC network element, one of them restriction are exactly the signaling link bandwidth of BSC and MSC (Mobile SwitchCenter, mobile switching centre).Under traditional situation, the signaling link between BSC and the MSC adopts the Signaling System Number 7 link, and BSC and MSC dispose a number 7 signaling respectively.When the arrowband of employing 64Kb/s between BSC and MSC Signaling System Number 7 link, be subjected to the constraint of No. seven agreements, maximum between the two configurable 16 signaling links, in this case, the signaling link maximum bandwidth between BSC and the MSC is 1024Kb/s.Under the mobile traffic model of classics, this bandwidth approximately can support the traffic of 4000Erl, and this can't satisfy the requirement of the desired single big capacity BSC of present operator.
At present had some technology to solve the problem that above-mentioned capacity is subject to bandwidth, such as No. seven employing 2M signaling links, perhaps the signaling link between BSC and the MSC uses Ethernet.But; if the MSC of operator has built and has finished; and this MSC only supports narrow-band signaling link No. seven; on the one hand; operator wishes to enjoy the benefit that the single big capacity BSC network element of aforesaid use brings; on the other hand, the MSC that has built well is reluctant to change in order to protect its original investment in operator.In fact, this situation is also more common in the CDMA of reality commercial network.Under this situation, previously described technology can't solve all that single BSC NE capacity that operator faces is subject to and MSC between the problem of signaling link bandwidth.
In order to address the above problem, can be at a plurality of number 7 signalings of single BSC network element deploy, just a BSC correspondence a plurality of office directions, expand the signaling link bandwidth between single BSC network element and the MSC, thereby satisfy the bandwidth requirement of jumbo BSC signaling link.Fig. 1 shows the embodiment of the corresponding a plurality of office directions of a single BSC network element.In the BSC network element configuration after many signalings, the unavoidable following problems that run into:
Generally speaking, MSC is according to LAC (Location Area Code, the lane place number) zone sends beep-page message, and BSC will send this message to its all BTS (BaseTransceiver Station, base transceiver station) that hang down after receiving beep-page message.The LAC of an interior configuration of BSC network element is identical, so synchronization MSC sends beep-page message only can for a BSC.If a BSC network element is expanded a plurality of BSC network elements by the multiple signaling points configuration, their LAC is also just identical.And this configuration is common actual commercial the time.Therefore, in this configuration, MSC can send repeatedly beep-page message to this BSC, thereby BSC can send repeatedly beep-page message to BTS, and BTS can send repeated message to terminal by eating dishes without rice or wine again.So just increased the load of system.For example, referring to Fig. 1 and Fig. 2, in system shown in Figure 1, if MSC desires to send beep-page message to the LAC1 zone: at first, because the office direction 1 of BSC is connected with LAC1, so MSC will send beep-page message to the office direction 1 of BSC, after BSC receives this beep-page message, this beep-page message can be sent to the BTS that is positioned at the LAC1 zone; Then, because the office direction 2 of BSC also is connected with LAC1, so MSC will after BSC receives this beep-page message, also can send to this beep-page message the BTS that is positioned at the LAC1 zone also to the office direction 2 transmission beep-page messages of BSC.As shown in Figure 2, so just cause the repetition of message, increased the burden of system; In addition, terminal also can repeat the same beep-page message of receiving that BTS sends, causes terminal use's confusion, makes troubles to the terminal use.
Under many signaling configurations, though can avoid the repetition message problem by giving different B SC network element configuration Different L AC, but in practical application, also have the whole network Radio Paging in the cdma network, be not with LAC in this whole network broadcast paging messages, the BSC that the multiple signaling points configuration can appear in this situation equally receives identical repeated paging message, then these message is repeated to send to the problem of BTS.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of message sending under multi-signaling configuration of base station controller, by this method, can avoid in network, repeating to send message, thereby reduce system burden, reach the purpose that makes full use of multiple signaling points expansion capacity and bandwidth.
In order to address the above problem, the invention provides a kind of method of message sending under multi-signaling configuration of base station controller, may further comprise the steps:
(1) be related office direction of each signalling point of base station controller, for first-selected forwarding office of message arrangement of sending to each lane place number under the described base station controller to;
(2) mobile switching centre sends message by described each signalling point to described base station controller;
(3) described base station controller receives described message, as have the lane place number as described in judging in the message, then obtain the lane place number that carries in the described message, the office direction of judging the transmission signalling point association of described message then whether be described message the pairing first-selected forwarding office of lane place number to, if then the first-selected forwarding office by this lane place number correspondence is to described message being sent to relevant base station sending and receiving stations under this base station controller.
Further, in the described step (1), also for each lane place number dispose at least one optional forwarding office to, at described first-selected forwarding office when breaking down, base station controller by this optional forwarding office to the transmission message.
Further, in the described step (1), corresponding at least one the number zone, lane place of each office direction.
Further, said method also comprises: in the described step (3), as described base station controller judge the office direction of the transmission signalling point association of described message be not this message the pairing first-selected forwarding office of lane place number to, then abandon this message.
Further, described message comprise the forward direction beep-page message of broadcast, band lane place number, not with the general page message of the forward direction beep-page message and the band lane place number of lane place number.
Further, in the described step (1), also on the described base station controller not with first-selected forwarding office of message arrangement of lane place number to.
Further, in the described step (1), also on the described base station controller not with at least one optional forwarding office of message arrangement of lane place number to, at described first-selected forwarding office when breaking down, base station controller by this optional forwarding office to transmission message.
Further, in the described step (3), after described base station controller receives described message, if judge and do not have the lane place number in the described message, the office direction of then judging the transmission signalling point association of this message whether be not with the lane place number message arrangement first-selected forwarding office to, if, by this first-selection forwarding office to this message is sent to base transceiver stations all under the described base station controller; If not, abandon this message.
Further, in the described step (1), in the storage device of base station controller, set up a first-selected forwarding office to table, the first-selected forwarding office of described configuration to information stores this first-selection forwarding office to the table in.
The present invention compared with prior art, its beneficial effect is: under the multiple signaling points configuring condition, BTS can filter out the beep-page message of repetition, has reduced the load of system, improve the operational efficiency of system, fully reached the purpose of multiple signaling points expansion capacity and bandwidth.
Description of drawings
Fig. 1 is one and has disposed 3 signalling points (office direction) and the BSC in 2 LAC zones and the connection diagram of MSC;
Fig. 2 is the flow chart that the BSC of many signaling configurations in the prior art repeats to send message;
Fig. 3 is the flow chart of the method for message sending under multi-signaling configuration of base station controller of the present invention;
Fig. 4 is the product process figure of first-selected forwarding office to table;
Fig. 5 is the process chart of the BSC of many signaling configurations of the present invention to transmission message;
Fig. 6 is the effect flow chart that the BSC of many signaling configurations of the present invention repeats to send message.
Embodiment
The thinking of the method for message sending under multi-signaling configuration of base station controller of the present invention is, for first-selected forwarding office of each LAC configuration to, when BSC receives the message that MSC sends, only use corresponding first-selected forwarding office to send message to corresponding LAC zone.
Below in conjunction with the drawings and specific embodiments the present invention is done furtherly, but not as a limitation of the invention.
As shown in Figure 3, the method for message sending under multi-signaling configuration of base station controller of the present invention may further comprise the steps:
Step 301: be related office direction of each signalling point of base station controller (BSC), each office direction can corresponding one or more LAC zone;
Step 302: the optional forwarding office that can be used as message for first-selected forwarding office of message arrangement of sending to each LAC to, other office direction that links to each other with this LAC to; For not with the message of LAC also dispose a first-selected forwarding office to;
Step 303: mobile switching centre (MSC) sends a message to BSC, and this message can be not to be with the broadcast of LAC, also can be the general page message of band LAC, can also be band LAC or not with the forward direction beep-page message of LAC;
Step 304:BSC for the message of carrying LAC, obtains the LAC in the message after receiving the message that MSC sends, and the first-selected forwarding office that utilizes this LAC correspondence then is to this message is sent to the relevant base station sending and receiving stations; For not with the message of LAC, the first-selected forwarding office that is utilized as the message arrangement of not being with LAC is to this message is sent to the relevant base station sending and receiving stations.
In the above-mentioned steps 302,, can generate a first-selected forwarding office to table for the ease of management, be used to store first-selected forwarding office to configuration information, generate first-selected forwarding office as shown in Figure 4 to the flow process of table, may further comprise the steps:
Step 401: be the keyword owning administration that finds out corresponding each LAC with LAC to;
Step 402: from the office direction of each LAC correspondence, select an office direction as the first-selected forwarding office of the message that sends to this LAC to, other office direction can be used as optional forwarding office to; LAC, first-selected forwarding office to optional forwarding office to respectively as the project of first-selected forwarding office to table;
Step 403: from the owning administration of BSC to office direction of selection as broadcast etc. not with the first-selected forwarding office of the message of LAC to, other office direction can be used as optional forwarding office to; This not with the message of LAC and corresponding first-selected forwarding office thereof to optional forwarding office to can be used as article one record of first-selected forwarding office to table.
Among the present invention, BSC is after receiving the message that MSC sends, and concrete handling process may further comprise the steps as shown in Figure 5:
Step 501:BSC judges at first whether this message is broadcast after receiving the message that MSC sends, if, execution in step 505; If not, execution in step 502;
Step 502: judge whether carry LAC in the message, if having, execution in step 503; If no, execution in step 505;
Step 503: inquire about first-selected forwarding office to table according to the LAC that carries in the message, the first-selected forwarding office that obtains this LAC correspondence is to, execution in step 504;
Step 504: whether the first-selected forwarding office that the LAC that the forwarding office of judging this message carries in (signalling point) and this message is corresponding consistent to, if consistent, then with this message by this first-selection forwarding office to the base transceiver station that sends to purpose LAC zone (BTS); If inconsistent, then abandon this message, flow process finishes.
Step 505: inquire about first-selected forwarding office to table, the first-selected forwarding office that obtains the message correspondence of not being with LAC is to, execution in step 506;
Step 506: the forwarding office of judging this message to (signalling point) with not consistent to whether with the corresponding first-selected forwarding office of the message of LAC, if consistent, then with this message by this first-selection forwarding office to sending to the described base transceiver station (BTS) that this BSC hangs down; If inconsistent, then abandon this message, flow process finishes.
Lift a concrete Application Example below and further specify, this Application Example realizes based on system shown in Figure 1.
In Fig. 1, jumbo single BSC network element configuration 3 office directions, 2 LAC districts link to each other with MSC by arrowband Signaling System Number 7 link.Hung 5 BTS under the BSC, wherein, BTS1 belongs to office direction 1, and BTS2 and BTS3 belong to office direction 2, and BTS3 and BTS4 belong to office direction 3.The LAC1 zone comprises BTS1 and BTS2; The LAC2 zone comprises BTS3, BTS4 and BTS5.
The message that MSC sends to BTS comprises the forward direction beep-page message of broadcast (not with LAC information), band LAC information, not with the forward direction beep-page message of LAC information with have the general page message of LAC information.Be that example describes with broadcast with the general page message that has LAC information respectively below.The handling process of the forward direction beep-page message of band LAC information is identical with the general page message that has LAC information, and the handling process with the forward direction beep-page message of LAC information is not identical with broadcast.
At first, generate a first-selected forwarding office to table:
The office direction of LAC1 correspondence has office direction 1 and office direction 2, choose office direction 1 as the first-selected forwarding office of the message that sends to LAC1 to, office direction 2 be optional forwarding office to;
The office direction of LAC2 correspondence has office direction 2 and office direction 3, choose office direction 2 as the first-selected forwarding office of the message that sends to LAC2 to, office direction 3 be optional forwarding office to;
Broadcast can send by any office direction, promptly corresponding whole three office directions, choose office direction 1 for the first-selected forwarding office of broadcast to, office direction 2 and office direction 3 be optional forwarding office to.
The first-selected forwarding office that generates is as follows to table:
| ?LAC | First-selected forwarding office to | Optional forwarding office to | ? | ? | |
| | Office direction | 1 | |
|
|
| ?LAC1 | |
|
Office direction 2 | - | |
| ?LAC2 | Office |
|
Office direction 3 | - |
Need to prove, at the first-selected forwarding office of this embodiment in table, optional forwarding office to first an of hurdle be allocated to first-selected forwarding office to, and it is still kept in this table, so that other professional uses.Certainly, according to actual needs, first-selected forwarding office to the table in optional forwarding office in a hurdle, also can not comprise be allocated to first-selected forwarding office to office direction.
If MSC will send beep-page message to the BTS in LAC1 zone and since the office direction 1 of BSC and office direction 2 all with the LAC1 correspondence, so MSC sends message can for simultaneously office direction 1 and office direction 2.After BSC receives the message that MSC sends to office direction 1, judge and have LAC information in the message, its value is LAC1, BSC inquires about first-selected forwarding office to table, the first-selected forwarding office that obtains the LAC1 correspondence is to being office direction 1, with the forwarding office of this message to consistent, so BSC sends to BTS1 and the BTS2 that belongs to the LAC1 zone with this message by office direction 1; After BSC receives the message that MSC sends to office direction 2, judge and have LAC information in the message, its value is LAC1, BSC inquires about first-selected forwarding office to table, the first-selected forwarding office that obtains the LAC1 correspondence is to being office direction 1, with the forwarding office of this message to inconsistent, abandon this message, thus avoided message repeat send.Its effect as shown in Figure 6, as can be seen from Figure 6, the message that is sent to office direction 1 (first-selected forwarding office to) by MSC is normally sent to BTS1 and BTS2, and the message that sends to office direction 2 is blocked after arriving BSC, no longer be sent to BTS, thereby saved system resource, improved the operational efficiency of system.
If MSC will send broadcast to the BTS that BSC hangs down, because broadcast will be sent to all BTS, so MSC can send message to office direction 1, office direction 2 and office direction 3 simultaneously.After BSC receives the broadcast that MSC sends to office direction 1, judge and do not have LAC information in the message, BSC inquires about first-selected forwarding office to table, obtain the corresponding first-selected forwarding office of broadcasting to being office direction 1, with the forwarding office of this message to consistent, therefore BSC sends to all BTS that BSC hangs down with this broadcast by office direction 1, promptly sends to BTS1～BTS5; After BSC receives the broadcast that MSC sends to office direction 2 or office direction 3, judging does not have LAC information in the message, BSC inquires about first-selected forwarding office to table, obtains the corresponding first-selected forwarding office of broadcasting to being office direction 1, with the forwarding office of message to inconsistent, therefore abandon this message.Thereby avoided the transmission that repeats of message.
The above embodiment only is preferred embodiment of the present invention, and the present invention also can have other various embodiments.Under the situation that does not deviate from spirit of the present invention and essence thereof, those skilled in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong within the protection range of the appended claim of the present invention.
Claims (9)
1. the method for a message sending under multi-signaling configuration of base station controller is characterized in that, may further comprise the steps:
(1) be related office direction of each signalling point of base station controller, for first-selected forwarding office of message arrangement of sending to each lane place number under the described base station controller to;
(2) mobile switching centre sends message by described each signalling point to described base station controller;
(3) described base station controller receives described message, as have the lane place number as described in judging in the message, then obtain the lane place number that carries in the described message, the office direction of judging the transmission signalling point association of described message then whether be described message the pairing first-selected forwarding office of lane place number to, if then the first-selected forwarding office by this lane place number correspondence is to described message being sent to relevant base station sending and receiving stations under this base station controller.
2. the method for claim 1 is characterized in that,
In the described step (1), also for each lane place number dispose at least one optional forwarding office to, at described first-selected forwarding office when breaking down, base station controller by this optional forwarding office to the transmission message.
3. the method for claim 1 is characterized in that,
In the described step (1), corresponding at least one the number zone, lane place of each office direction.
4. the method for claim 1 is characterized in that, also comprises:
In the described step (3), as described base station controller judge the office direction of the transmission signalling point association of described message be not this message the pairing first-selected forwarding office of lane place number to, then abandon this message.
5. the method for claim 1 is characterized in that,
Described message comprises the forward direction beep-page message of broadcast, band lane place number, not with the general page message of the forward direction beep-page message and the band lane place number of lane place number.
6. method as claimed in claim 5 is characterized in that,
In the described step (1), also on the described base station controller not with first-selected forwarding office of message arrangement of lane place number to.
7. method as claimed in claim 6 is characterized in that,
In the described step (1), also on the described base station controller not with at least one optional forwarding office of message arrangement of lane place number to, at described first-selected forwarding office when breaking down, base station controller by this optional forwarding office to transmission message.
8. as claim 6 or 7 described methods, it is characterized in that,
In the described step (3), after described base station controller receives described message, if judge and do not have the lane place number in the described message, the office direction of then judging the transmission signalling point association of this message whether be not with the lane place number message arrangement first-selected forwarding office to, if, by this first-selection forwarding office to this message is sent to base transceiver stations all under the described base station controller; If not, abandon this message.
9. as any described method in the claim 1～7, it is characterized in that,
In the described step (1), in the storage device of base station controller, set up a first-selected forwarding office to table, the first-selected forwarding office of described configuration to information stores this first-selection forwarding office to the table in.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1463111A (en) * | 2002-05-31 | 2003-12-24 | 华为技术有限公司 | Method of multipoint encoding and load sharing for transit point in number 7 signaling |
| CN1505321A (en) * | 2002-11-28 | 2004-06-16 | 深圳市中兴通讯股份有限公司 | A GT translation method for realizing load sharing between multiple signaling points |
| CN1534970A (en) * | 2003-03-28 | 2004-10-06 | 上海粱江通信软件有限公司 | Serious failure fast restoring emergency method for telephone exchange terminal office |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1463111A (en) * | 2002-05-31 | 2003-12-24 | 华为技术有限公司 | Method of multipoint encoding and load sharing for transit point in number 7 signaling |
| CN1505321A (en) * | 2002-11-28 | 2004-06-16 | 深圳市中兴通讯股份有限公司 | A GT translation method for realizing load sharing between multiple signaling points |
| CN1534970A (en) * | 2003-03-28 | 2004-10-06 | 上海粱江通信软件有限公司 | Serious failure fast restoring emergency method for telephone exchange terminal office |
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