CN101801047B - Method for establishing local exchange and core network equipment - Google Patents
Method for establishing local exchange and core network equipment Download PDFInfo
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- CN101801047B CN101801047B CN 200910105352 CN200910105352A CN101801047B CN 101801047 B CN101801047 B CN 101801047B CN 200910105352 CN200910105352 CN 200910105352 CN 200910105352 A CN200910105352 A CN 200910105352A CN 101801047 B CN101801047 B CN 101801047B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/18—Service support devices; Network management devices
- H04W88/181—Transcoding devices; Rate adaptation devices
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Abstract
The embodiment of the invention discloses a method for establishing local exchange and core network equipment, wherein the method comprises the following steps of: if a condition for establishing the local exchange is satisfied, sending an assignment request message to a base station subsystem to inform resources assigned by the base station subsystem for two calls for forming a conversation and inquire whether the local exchange can be carried out by the base station subsystem; obtaining the information that whether the local exchange can be carried out by the base station subsystem through receiving an assignment finish message returned by the base station subsystem; and if the local exchange can be carried out by the base station subsystem, indicating the base station subsystem to carry out the local exchange. Through the technical scheme of the embodiment of the invention, the transmission resource of an A interface can be saved.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of method and equipment of the core network of setting up local exchange.
Background technology
Transmission network is the important component part of cordless communication network, and the operator of at present a lot of countries and regions has affected deployment, operation and professional the carrying out of wireless network because connect the bottleneck problem of the transfer resource of wireless access network and core net.In areas such as Africa, the development speed of wireless network is far above the development of cable network.Taking in Europe as the area of representative, owing to be subject to the restriction of local law rules, the construction of ground wire transmission network can't be built according to the demand of operator.Even the terrestrial transmission resource is than the country of horn of plenty, such as China, also facing to remote districts, island being carried out with high costs when building of transmission network, the problem that rate of return on investment is low.In above-mentioned scene, operator is generally the method that adopts microwave, satellite or rent the terrestrial transmission circuit.Therefore, reduction takies transmission network bandwidth, can effectively reduce networking and operation cost, and local exchange is exactly a kind of method of effective reduction transfer resource bandwidth.
As shown in Figure 1, local exchange can be divided into local exchange and the interior local exchange of base station controller (Base Station Controller, BSC) in the base transceiver station (Base Transceiver Station, BTS).For the local exchange in the BTS, the session both sides are positioned at same BTS, or in same BTS bunch (for the situation of BTS cascade), the loopback of voice link occurs among the corresponding BTS.By setting up the local exchange in the BTS, can realize the saving to Abis and A port transmission resource.For the local exchange in the BSC, the session both sides are positioned at same BSC, but in different BTS (BTS bunch), the voice link loopback occurs among the corresponding BSC.By setting up the local exchange in the BSC, can realize the saving to A port transmission resource.
Whether setting up local exchange in the prior art is determined by BSC.Whether BSC adopts identical encoding and decoding by two callings that judge to consist of session, and whether belong to same BTS (bunch) or BSC, and then determine whether to set up local exchange.
The inventor finds in realizing process of the present invention, in the prior art because BSC does not notify (the Mobile Switching Center of mobile switching centre after setting up local exchange, MSC), thus MSC for two local exchanges of having called out whether executed and do not know.So, just can't the miscellaneous supplementary service of effective support (for example Call Waiting is called out maintenance, MPTY, Lawful Interception etc.).Simultaneously, after BSC carried out local exchange, A interface related resource did not discharge.In time division multiplexing (Time Division Multiplex, TDM) situation, can't save A interface transfer resource.
Summary of the invention
Embodiments of the invention provide a kind of method and equipment of the core network of setting up local exchange, to save A interface transfer resource.
On the one hand, the embodiment of the invention provides a kind of method of setting up local exchange, comprising:
If satisfy the condition of setting up local exchange, then inform described base station sub-system for the resource of two call distributions of formation session and inquire whether described base station sub-system can carry out local exchange by send assignment request message to base station sub-system;
Finish message and obtain the information whether described base station sub-system can carry out local exchange by receiving appointment that described base station sub-system returns;
If described base station sub-system can be carried out local exchange, then indicate described base station sub-system to carry out local exchange.
On the other hand, the embodiment of the invention also provides a kind of equipment of the core network, comprising:
Resource allocation unit, if be used for satisfying the condition of setting up local exchange, then inform described base station sub-system for the resource of two call distributions of formation session and inquire whether described base station sub-system can carry out local exchange by send assignment request message to base station sub-system;
Information acquisition unit is used for finishing message and obtaining the information whether described base station sub-system can carry out local exchange by receiving appointment that described base station sub-system returns;
The local exchange processing unit can be carried out local exchange if be used for described base station sub-system, then indicates described base station sub-system to carry out local exchange; If described base station sub-system can not be carried out local exchange, then continue to finish the appointment flow process.
In the technical scheme that the embodiment of the invention provides, by being determined whether to set up local exchange by equipment of the core network (MSC), and seek the opinion of the ability whether it possesses the local exchange set up to BSS, thus set up the process of local exchange, can effectively save A interface transfer resource.
Description of drawings
Fig. 1 is local exchange schematic diagram of the prior art;
The method flow schematic diagram one of setting up local exchange that Fig. 2 provides for the embodiment of the invention;
The method flow schematic diagram two of setting up local exchange that Fig. 3 provides for the embodiment of the invention;
The equipment of the core network structural representation one that Fig. 4 provides for the embodiment of the invention;
The equipment of the core network structural representation two that Fig. 5 provides for the embodiment of the invention.
Embodiment
It is a kind of in the appointment process that the embodiment of the invention provides, and judged whether to set up local exchange by MSC, and seek the opinion of the technical scheme of setting up local exchange of its ability that whether possesses the local exchange set up to BSS, thereby effectively save A interface transfer resource.
Below in conjunction with accompanying drawing, the embodiment of the invention is done further detailed description.
As shown in Figure 2, the embodiment of the invention provides a kind of method of setting up local exchange, specifically comprises:
The method of setting up local exchange that the embodiment of the invention provides, can be judged whether to set up local exchange by MSC, and seek the opinion of the ability whether it possesses the local exchange set up to BSS, thereby better support supplementary service, for example Call Waiting, calling maintenance, MPTY and Lawful Interception etc.; And effectively save A interface transfer resource.
Optionally, if described base station sub-system can not be carried out local exchange, then continue to finish current appointment flow process.
Optionally, before step 201 sends assignment request message to described base station sub-system, described method may further include: receive layer three information that described base station sub-system reports in call establishment, determine whether to satisfy the condition of setting up local exchange according to described layer three information.
Which calling MSC can determine can be set up local exchange.For example, MSC can consist of by record two cell IDs (Cell-ID) of calling out the residential quarter, place of session, in conjunction with two employed encoding and decoding of calling and current requirement to supplementary service, determine whether to allow two call setup local exchanges of described session.For example, MSC can judge whether certain two calling can set up local exchange according to following several aspects:
Whether two callings of 1) setting up local exchange are positioned at same BSS;
Whether identical or compatible, perhaps the transcoder of two callings (TC) resource is positioned on the BSC if 2) setting up the encoding and decoding of two callings of local exchange;
3) for supplementary service, professional attribute can not conflict with local exchange, for example, conflicts with local exchange for Call Waiting, the attribute of calling out the supplementary services such as maintenance, MPTY, can't carry out local exchange.
For each calling under the same MSC, can adopt certain identification means, it is carried out unique identification.For example, can adopt the cell of call identification (Call-ID) to identify.Except Call-ID, can also adopt other modes, present specification institute act mode is not construed as limiting it.
Optionally, can after receiving the connection message of called transmission, indicate described base station sub-system to carry out local exchange.By with the local exchange flow setting after MSC receives called connection message, can avoid affecting voice quality because introducing the lost speech frames that causes after the local exchange.
Inform in the described step 201 base station sub-system be under the resource of call distribution can comprise: be the resource that described local exchange is distributed, perhaps, the resource of distributing for described local exchange and be core net user's face resource of described call distribution.
Optionally, described assignment request message, assign and finish message and can connect transmission in described caller or called signaling connection control protocol SCCP with the local exchange command messages of being connected described base station sub-system to carry out local exchange.MSC connects to bristle with anger up and down by the SCCP a calling sends message, has avoided all issuing assignment messages on calling and called, believes modern message thereby can reduce the A interface, shortens the duration of call setup.
As shown in Figure 3, the embodiment of the invention also provides a kind of method of setting up local exchange, and supposition portable terminal 1 (MS1) is caller in the present embodiment, and portable terminal 2 (MS2) is called, and this embodiment specifically comprises:
S301, base station sub-system (Base Station Subsystem, BSS) sends complete layer three message (COMPLETE LAYER 3 MESSAGEs) relevant with caller to MSC, includes layer three information relevant with caller in described layer three message.
S302, MS1 sends call setup message (SETUP) by described BSS to MSC.
S303, BSS sends and called relevant complete layer three message to MSC, includes in described layer three message and called relevant layer three information;
Layer three information that the calling and called that report according to BSS are relevant, MSC can determine whether two callings that consist of above-mentioned session satisfy the condition of setting up local exchange, and definite similar process that concrete deterministic process and previous embodiment are described repeats no more herein.
S304, MSC receive the call confirmation message (CALL CONFIRMED) that MS2 reports after the test of having finished all compatible equipment delivery values, notice MSC has received that all foundation conversations connect needed message.
S305, if MSC determines that described two are called out the satisfied condition of setting up local exchange, then connect by caller or called signaling connection control protocol SCCP and issue local exchange assignment request (LSASSIGNMENT REQUEST) message, inform that by described message BSS is the resource of described two call distributions, and inquire whether described BSS can carry out local exchange.The resource of described distribution can be the resource of distributing for carrying out local exchange, perhaps, also can be for carrying out the resource that local exchange distributes and be core net user's face resource of described call distribution, prepare against when failing to carry out local exchange, described calling can import core net.By being judged whether to set up local exchange by MSC, and seek the opinion of the ability whether it possesses the local exchange set up to BSS, can better support supplementary service, for example Call Waiting, call out maintenance, MPTY and Lawful Interception etc.; And can effectively save A interface transfer resource.MSC connects to bristle with anger up and down by the SCCP a calling sends message, has avoided all issuing assignment messages on calling and called, thereby can reduce A interface signaling message, shortens the duration of call setup.
S306, after BSS receives described local exchange assignment request message, according to the required resource of the described call distribution of being designated as of described local exchange assignment request message, the appointment of transmission local exchange is finished (LSASSIGNMENT COMPLETE) message and is notified its resource to assign to MSC, and the result that simultaneously whether oneself can be carried out local exchange finishes (LS ASSIGNMENTCOMPLETE) message by the local exchange appointment and sends to MSC.The object information whether described BSS can carry out local exchange can be carried at local exchange and assign the local exchange of finishing message to judge in (LOCAL SWITCHJUDGMENT) cell, certainly, can be carried in other cell, the embodiment of the invention does not limit this yet.Message is finished in described local exchange appointment also can only connect transmission in caller or called SCCP, than in the SCCP of calling and called connection, all sending, can save the size of message of half, thereby can reduce A interface signaling message, shorten the duration of call setup.
S307, MS2 sends reminder message (ALERTING) to MSC.
S308, MSC sends reminder message (ALERTING) to MS1.
S309, MSC receive the connection message (CONNECT) that MS2 sends, the beginning call charging.
S310 if assign when finishing message and determining that BSS can carry out local exchange according to the local exchange that receives, then sends local exchange order (LOCAL SWITCH COMMAND) message to BSS, and indication BSS carries out the local exchange associative operation; If assign when finishing message and determining that BSS can not carry out local exchange according to the local exchange that receives, then subsequent operation is carried out according to existing appointment flow process.Described local exchange command messages also can only connect transmission in caller or called SCCP, than all sending in the SCCP of calling and called connection, can save the size of message of half, believes modern message thereby can reduce the A interface, shortens the duration of call setup.
S311, BSS, then send local exchange to MSC and finish (LOCAL SWITCH COMPLETE) message if run succeeded according to described local exchange command execution local exchange associative operation, and the notice local exchange is set up and finished.If can't set up local exchange, then can send local exchange failure (LOCAL SWITCH FAILURE) message to MSC, notice MSC local exchange is set up unsuccessfully, and MSC then is left core net user's face resource of described two call distributions, to carry out follow-up call setup step.Described local exchange finishes message or the local exchange failed message also can only connect transmission in caller or called SCCP, than in the SCCP of calling and called connection, all sending, can save the size of message of half, believe modern message thereby can reduce the A interface, shorten the duration of call setup.
After S312, MSC receive that described local exchange is finished message, then send connection (CONNECT) message to MS1, indication connects by network.Above-mentioned local exchange Establishing process receives that by being arranged on MSC MSC issues before the CONNECT message to MS1 after the CONNECT message of MS2, thereby can avoid affecting voice quality because introduce the lost speech frames that causes after the local exchange.Certainly, this only is a preferred embodiment of the present invention, and the embodiment of the invention is not intended to limit the particular location of above-mentioned local exchange flow process.
S313, MS1 sends CONNect Acknowledgement (CONNECTACK) message to described MSC.
S314, MSC remove and are core net user's face resource of described two call distributions, send CONNect Acknowledgement (CONNECTACK) message to MS2.
Those skilled in the art can understand, and above-mentioned flow process only is exemplary, and the embodiment of the invention is not intended to limit the sequencing of each message in the above-mentioned flow process.Concrete function and the structure of the part message in the above-mentioned flow process can with reference to related protocol, repeat no more herein.
As shown in Figure 4, the embodiment of the invention also provides a kind of equipment of the core network, specifically comprises:
Local exchange processing unit 430 can carry out local exchange if be used for described base station sub-system, then indicates described base station sub-system to carry out local exchange; If described base station sub-system can not be carried out local exchange, then continue to finish the appointment flow process.
As shown in Figure 5, the embodiment of the invention also provides a kind of equipment of the core network, specifically comprises:
Local exchange processing unit 430 can carry out local exchange if be used for described base station sub-system, then indicates described base station sub-system to carry out local exchange; If described base station sub-system can not be carried out local exchange, then continue to finish the appointment flow process.
Described local exchange processing unit 430 can comprise:
Indicating module 4301 can carry out local exchange if be used for described base station sub-system, then after receiving called connection message, indicates described base station sub-system to carry out local exchange;
Assignment module 4302 can not be carried out local exchange if be used for described base station sub-system, then continues to finish the appointment flow process.
Optionally, described equipment can also comprise:
Determining unit 440, be used for before described resource allocation unit 410 sends assignment request message to base station sub-system, receive layer three information that described base station sub-system reports in call establishment, determine whether to satisfy the condition of setting up local exchange according to described layer three information.Definite similar process that concrete deterministic process and previous embodiment are described repeats no more herein.
Wherein said resource allocation unit informs that base station sub-system is that the resource that consists of two call distributions of session comprises: be the resource of described local exchange distribution, the resource of perhaps, distributing for described local exchange and be core net user's face resource of described call distribution.Message is finished in described assignment request message, appointment can connect transmission in described caller or called SCCP with the local exchange command messages of being connected described base station sub-system to carry out local exchange.
The equipment of the core network that using the embodiment of the invention provides is carried out detailed process and the inventive method embodiment basic simlarity of setting up local exchange, repeats no more herein.
The equipment of the core network that the embodiment of the invention provides, can in the appointment process, be judged whether to set up local exchange by equipment of the core network, and seek the opinion of the ability whether it possesses the local exchange set up to BSS, thereby can better support supplementary service, for example Call Waiting, calling maintenance, MPTY and Lawful Interception etc.; And effectively save A interface transfer resource; Further, by with the local exchange flow setting after equipment of the core network is received the connection message of called transmission, can avoid affecting voice quality because introducing the lost speech frames that causes after the local exchange; Further, by issuing message in the SCCP of calling connection, for example message and local switching command message etc. are finished in assignment request message, appointment, all issue assignment messages in the SCCP connection of having avoided at calling and called, thereby can reduce A interface signaling message, shorten the duration of call setup.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method is to come the relevant hardware of instruction to finish by program, described program can be stored in the computer-readable recording medium, such as ROM/RAM, magnetic disc or CD etc.
The above; be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (11)
1. a method of setting up local exchange is characterized in that, comprising:
If satisfy the condition of setting up local exchange, then inform described base station sub-system for the resource of two call distributions of formation session and inquire whether described base station sub-system can carry out local exchange by send assignment request message to base station sub-system;
Finish message and obtain the information whether described base station sub-system can carry out local exchange by receiving appointment that described base station sub-system returns;
If described base station sub-system can be carried out local exchange, then indicate described base station sub-system to carry out local exchange.
2. the method for claim 1 is characterized in that,
If described base station sub-system can not be carried out local exchange, then continue to finish the appointment flow process.
3. the method for claim 1 is characterized in that, before described base station sub-system transmission assignment request message, described method further comprises:
Receive layer three information that described base station sub-system reports in call establishment, determine whether to satisfy the condition of setting up local exchange according to described layer three information.
4. the method for claim 1 is characterized in that,
Receive after the called connection message, indicate described base station sub-system to carry out local exchange.
5. such as the described method of any one in the claim 1 to 4, it is characterized in that, the described base station sub-system of informing is that the resource that consists of two call distributions of session comprises: be the resource of described local exchange distribution, the resource of perhaps, distributing for described local exchange and be core net user's face resource of described call distribution.
6. such as the described method of any one in the claim 1 to 4, it is characterized in that the local exchange command messages that described assignment request message, appointment are finished message and be connected described base station sub-system to carry out local exchange connects transmission in caller or called signaling connection control protocol SCCP.
7. an equipment of the core network is characterized in that, comprising:
Resource allocation unit, if be used for satisfying the condition of setting up local exchange, then inform described base station sub-system for the resource of two call distributions of formation session and inquire whether described base station sub-system can carry out local exchange by send assignment request message to base station sub-system;
Information acquisition unit is used for finishing message and obtaining the information whether described base station sub-system can carry out local exchange by receiving appointment that described base station sub-system returns;
The local exchange processing unit can be carried out local exchange if be used for described base station sub-system, then indicates described base station sub-system to carry out local exchange; If described base station sub-system can not be carried out local exchange, then continue to finish the appointment flow process.
8. equipment of the core network as claimed in claim 7 is characterized in that, described equipment also comprises:
Determining unit, be used for before described resource allocation unit sends assignment request message to base station sub-system, receive layer three information that described base station sub-system reports in call establishment, determine whether to satisfy the condition of setting up local exchange according to described layer three information.
9. equipment of the core network as claimed in claim 7 is characterized in that, described local exchange processing unit comprises:
Indicating module can be carried out local exchange if be used for described base station sub-system, then after receiving called connection message, indicates described base station sub-system to carry out local exchange;
Assignment module can not be carried out local exchange if be used for described base station sub-system, then continues to finish the appointment flow process.
10. such as the described equipment of the core network of any one in the claim 7 to 9, it is characterized in that, described resource allocation unit informs that base station sub-system is that the resource that consists of two call distributions of session comprises: be the resource of described local exchange distribution, the resource of perhaps, distributing for described local exchange and be core net user's face resource of described call distribution.
11. such as the described equipment of the core network of any one in the claim 7 to 9, it is characterized in that the local exchange command messages that described assignment request message, appointment are finished message and be connected described base station sub-system to carry out local exchange connects transmission in caller or called SCCP.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910105352 CN101801047B (en) | 2009-02-11 | 2009-02-11 | Method for establishing local exchange and core network equipment |
| PCT/CN2010/070597 WO2010091634A1 (en) | 2009-02-11 | 2010-02-10 | Method, apparatus and system for establishing local switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910105352 CN101801047B (en) | 2009-02-11 | 2009-02-11 | Method for establishing local exchange and core network equipment |
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| CN101801047A CN101801047A (en) | 2010-08-11 |
| CN101801047B true CN101801047B (en) | 2013-01-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102469516A (en) * | 2010-11-04 | 2012-05-23 | 中国移动通信集团公司 | Network load control method, device and system |
| CN103780579B (en) * | 2012-10-22 | 2017-02-08 | 中兴通讯股份有限公司 | Local switching control method and system for circuit switching base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159905A (en) * | 2007-11-07 | 2008-04-09 | 华为技术有限公司 | Local exchange method, core network equipment and network system of implementing in base station controller |
| CN101272626A (en) * | 2008-04-16 | 2008-09-24 | 华为技术有限公司 | Method, device and system for implementing local exchange |
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| US8818322B2 (en) * | 2006-06-09 | 2014-08-26 | Trapeze Networks, Inc. | Untethered access point mesh system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159905A (en) * | 2007-11-07 | 2008-04-09 | 华为技术有限公司 | Local exchange method, core network equipment and network system of implementing in base station controller |
| CN101272626A (en) * | 2008-04-16 | 2008-09-24 | 华为技术有限公司 | Method, device and system for implementing local exchange |
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| WO2010091634A1 (en) | 2010-08-19 |
| CN101801047A (en) | 2010-08-11 |
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