CN100407640C - Method for setting signaling channel bandwidth between central module and remote module - Google Patents
Method for setting signaling channel bandwidth between central module and remote module Download PDFInfo
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- CN100407640C CN100407640C CN200410091978XA CN200410091978A CN100407640C CN 100407640 C CN100407640 C CN 100407640C CN 200410091978X A CN200410091978X A CN 200410091978XA CN 200410091978 A CN200410091978 A CN 200410091978A CN 100407640 C CN100407640 C CN 100407640C
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Abstract
The present invention relates to a method for setting signaling channel bandwidths between a central module and a remote module; the central module and the remote module of an exchanger or a media gateway are connected by a time division multiplexing (TDM) signalling path; after the remote module is started, a default bandwidth which is arranged in advance is communicated with the central module and the central module also uses the same default bandwidth which is arranged in advance waits for communication with the remote module; the remote module and the central module are initially communicated by the default bandwidth; the remote module on the bandwidth requests bandwidth parameters to the central module; the central module sends downwards the actual bandwidth set by users to the remote module; after obtaining acknowledge, the central mould and the remote mould switched to the set bandwidth try to connect again. The present invention overcomes the defects that the prior art needs additional hardware in setting the bandwidth and has high cost, complicated operation and troubles in correcting errors, reduces cost, sets the bandwidth and modifies the errors conveniently.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method that the center module of communication equipment and the time division multiplexing signalling path bandwidth between the remote end module are provided with.
Background technology
In TDM (time division multiplexing) switch or the media gateway among the NGN (next generation network) in PSTN (public phone exchanges network), the notion that has remote end module, switch or media gateway are divided into center module and remote end module, connect continuous between the two by TDM.By transmission equipment, both can be or not same geographical position, and remote end module can be placed into the place nearer apart from the end user, is convenient to laying of subscriber's line; Center module can be placed on central machine room, safeguards unified management nearby.
Owing to need control and unify maintenance management to remote end module, during the TDM between remote end module and center module connects usually, mark off some time slots and be used for signaling link, on signaling link, move control messages and maintenance management message.Because the scale of remote end module and traffic carrying capacity is different, the also corresponding difference of the bandwidth of required signaling link, thus requirement that the signaling link bandwidth is provided with has been proposed.
Because the TDM connection characteristics will obtain more bandwidth and normally a plurality of 64K TDM time slots be bound, form the passage of a N * 64K.For this reason, with remote end module identical bandwidth must be set in center module, otherwise between the two can't communication.For example, if the bandwidth of remote end module setting is 2 * 64K passage, be 3 * 64K passage and center module is provided with bandwidth, obviously both can't communication.And this bandwidth can't be provided with by signalling path self usually, because for remote end module, if do not obtain correct communication bandwidth, then can't use signalling path to follow center module to carry out communication; And have only signalling path to use, with center module can communication after, could issue setting to remote end module.
Prior art generally is provided with by the width of toggle switch to signaling link.Toggle switch is set on remote end module, and remote end module is read the numerical value that is provided with on the toggle switch after starting, and determines the communication bandwidth in view of the above, carries out communication with center module.Also need the communication bandwidth is provided with in center module.
The shortcoming of prior art need to be extra hardware device on remote end module, and need mistake occur if be provided with at the enterprising line operate of remote end module, must go to remote location, could revise.On center module, also to be provided with, and will be consistent with remote end module.
Though prior art also can use other modes to be provided with on remote end module, and serial ports and Nonvolatile memory for example are provided on remote end module, by serial ports bandwidth parameter is write Nonvolatile memory.But there is the extra hardware device of above-mentioned needs equally, cost height, the shortcoming of operation and correction trouble.
Summary of the invention
Technical problem to be solved by this invention is: overcoming needs additional hardware when prior art is provided with the signaling link bandwidth between center module and the remote end module, the cost height, and the shortcoming of the operation and the trouble that corrects mistakes, a kind of method that signalling path bandwidth between center module and remote end module is provided with is provided, thereby reduces cost, be provided with easily and revise.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
This method that signalling path bandwidth between center module and remote end module is provided with may further comprise the steps:
Link to each other by the time division multiplexing signalling path between the center module of communication equipment and the remote end module, after remote end module starts, use a default bandwidth that sets in advance to carry out communication with center module, center module also uses the identical default bandwidth that sets in advance to wait for that remote end module is with its communication; After remote end module and center module are finished first communication by default bandwidth, remote end module on this bandwidth to center module bandwidth on demand parameter, center module is handed down to remote end module with the actual bandwidth that the user is provided with, after obtaining to confirm, both sides switch to this bandwidth are set, and restart to attempt contact.
Described communication equipment can be switch or media gateway.When the actual bandwidth that center module is provided with the user is handed down to remote end module, center module is carried out cyclic redundancy check (CRC) to message itself and is calculated, when remote end module receives message message is carried out cyclic redundancy check (CRC), if verification by remote end module confirm that the message of oneself receiving is correct; Remote end module sends acknowledge message to center module after receiving bandwidth parameter, if the bandwidth parameter in the acknowledge message is identical with the bandwidth numerical value of configuration, then center module affirmation remote end module has been received correct bandwidth parameter, thereby guarantees that actual bandwidth parameter correctly is delivered to remote end module from center module.
Message is all undertaken by reliable link layer host-host protocol, guarantees that bandwidth parameter message and acknowledge message can arrive the other side.The described default bandwidth that sets in advance can adopt minimum bandwidth, i.e. 64K time division multiplexing time slot.If remote end module interrupts with the contact of center module, perhaps use bandwidth is set sets up contact all the time of issuing, then remote end module can return back to described default bandwidth, restart to center module bandwidth on demand parameter, center module also return back to described default bandwidth, waits for the bandwidth request of remote end module.
Beneficial effect of the present invention is: the invention provides a kind of method that the center module of communication equipment and the signalling path bandwidth between remote end module are provided with, overcome and needed additional hardware when prior art is provided with the signaling link bandwidth between center module and the remote end module, cost height, and the shortcoming of the operation and the trouble that corrects mistakes.Utilize the present invention, on remote end module, need not extra hardware device; Only need on center module, be provided with, do not need to go the remote end module direct control to remote location, need not also to worry that remote end module and center module are provided with the inconsistent problem of parameter, can reduce cost, can realize setting easily to the signalling path bandwidth, and to mistake being set or unusually also can revising easily.
Embodiment
According to embodiment the present invention is described in further detail below:
The present invention is provided with problem by the bandwidth that the bandwidth negotiation method solves remote end module.After the remote end module of communication equipment (as switch or media gateway) starts, always be to use a default bandwidth that sets in advance (as minimum bandwidth, i.e. 64K TDM time slot) to carry out communication with center module.Center module also always is to use an identical default bandwidth that sets in advance (as minimum bandwidth, i.e. 64K TDM time slot), waits for that remote end module is with its communication.
In case remote end module and center module are finished first communication by the minimum bandwidth of acquiescence, remote end module just can be to center module bandwidth on demand parameter on this bandwidth.Center module is handed down to remote end module with the actual bandwidth that the user is provided with, and after obtaining to confirm, both sides switch to this bandwidth is set, and restart to attempt contact.Like this, utilize the present invention, on remote end module, need not extra hardware device; Only need on center module, be provided with, not need to go the remote end module direct control, need not also to worry that remote end module and center module are provided with the inconsistent problem of parameter to remote location.
General, remote end module will send communication message after switching on the 64K channel width repeatedly on this channel width.As long as after center module also switches to the 64K channel width, because the message of remote end module sends repeatedly, center module can be received communication message, is unlikely to the problem that exists both sides to stagger in time like this.
In view of the channel width parameter be both sides next step can normal communication the basis, must guarantee that this parameter can correctly be delivered to remote end module from center module.This just requires (1) remote end module to confirm oneself to receive proper messages; (2) center module affirmation remote end module has been received proper messages, and both sides just can carry out next step operation like this, promptly all switch to the actual disposition bandwidth and carry out communication.Reach above-mentioned requirements, the specific implementation method is: when (1) sends message message itself is carried out CRC (cyclic redundancy check (CRC)) and calculate, when receiving message message is carried out CRC check,, in transmission course, do not damage if verification is received proper messages by just thinking.(2) remote end module sends acknowledge message after receiving bandwidth parameter, and center module is waited for the affirmation message of remote end module, if the bandwidth parameter in the acknowledge message is identical with the numerical value of configuration, confirms that then remote end module received correct bandwidth parameter.(3) above message is all passed through reliable link layer host-host protocol, and for example the LAPD agreement (link access protocol on the D channel) of ITU-T definition is carried out, and guarantees that bandwidth parameter message and acknowledge message can arrive the other side, also can obtain notice if can not arrive.
As a safeguard measure, in case remote end module interrupts with the contact of center module, perhaps use bandwidth is set can't sets up contact all the time of issuing, remote end module will be automatically retracted back into default bandwidth, restart the bandwidth on demand parameter; Center module also return back to default bandwidth, waits for the bandwidth request of remote end module.Like this,, needn't go to revise to remote location, and, restart the bandwidth on demand parameter, revise easily by being automatically retracted back into default bandwidth if be provided with when mistake or abnormal conditions occurring.
Certainly, default bandwidth also can set in advance and be other bandwidth, those skilled in the art do not break away from essence of the present invention and spirit, can there be the various deformation scheme to realize the present invention, the above only is the preferable feasible embodiment of the present invention, be not so limit to interest field of the present invention, the equivalent structure that all utilizations specification of the present invention and accompanying drawing content are done changes, and all is contained within the interest field of the present invention.
Claims (6)
1. the method that the signalling path bandwidth between center module and remote end module is provided with is characterized in that, may further comprise the steps:
Link to each other by the time division multiplexing signalling path between the center module of communication equipment and the remote end module, after remote end module starts, use a default bandwidth that sets in advance to carry out communication with center module, center module also uses the identical default bandwidth that sets in advance to wait for that remote end module is with its communication;
After remote end module and center module are finished first communication by default bandwidth, remote end module on this bandwidth to center module bandwidth on demand parameter, center module is handed down to remote end module with the actual bandwidth that the user is provided with, after obtaining to confirm, both sides switch to this bandwidth are set, and restart to attempt contact.
2. the method that the signalling path bandwidth between center module and remote end module is provided with according to claim 1 is characterized in that: described communication equipment is switch or media gateway.
3. the method that the signalling path bandwidth between center module and remote end module is provided with according to claim 1 and 2 is characterized in that: the described default bandwidth that sets in advance adopts minimum bandwidth, i.e. 64K time division multiplexing time slot.
4. the method that the signalling path bandwidth between center module and remote end module is provided with according to claim 3, it is characterized in that: when the actual bandwidth that center module is provided with the user is handed down to remote end module, center module is carried out cyclic redundancy check (CRC) to message itself and is calculated, when remote end module receives message message is carried out cyclic redundancy check (CRC), if verification by remote end module confirm that the message of oneself receiving is correct; Remote end module sends acknowledge message to center module after receiving bandwidth parameter, if the bandwidth parameter in the acknowledge message is identical with the bandwidth numerical value of configuration, then center module affirmation remote end module has been received correct bandwidth parameter, thereby guarantees that actual bandwidth parameter correctly is delivered to remote end module from center module.
5. the method that the signalling path bandwidth between center module and remote end module is provided with according to claim 4, it is characterized in that: described message is all undertaken by reliable link layer host-host protocol, guarantees that bandwidth parameter message and acknowledge message can arrive the other side.
6. the method that the signalling path bandwidth between center module and remote end module is provided with according to claim 3, it is characterized in that: if remote end module interrupts with the contact of center module, perhaps use bandwidth is set sets up contact all the time of issuing, then remote end module return back to described default bandwidth, restart to center module bandwidth on demand parameter, center module also return back to described default bandwidth, waits for the bandwidth request of remote end module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200410091978XA CN100407640C (en) | 2004-12-31 | 2004-12-31 | Method for setting signaling channel bandwidth between central module and remote module |
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| CN200410091978XA CN100407640C (en) | 2004-12-31 | 2004-12-31 | Method for setting signaling channel bandwidth between central module and remote module |
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| CN1801731A CN1801731A (en) | 2006-07-12 |
| CN100407640C true CN100407640C (en) | 2008-07-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101471848B (en) * | 2007-12-28 | 2012-03-21 | 华为技术有限公司 | Method for adjusting signal transmission bandwidth, medium gateway and medium gateway controller |
| EP2667547B1 (en) * | 2011-07-29 | 2016-01-20 | Huawei Technologies Co., Ltd. | Bandwidth adjustment method, bus controller and signal converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282493A (en) * | 1997-11-19 | 2001-01-31 | 通信集合公司 | An adaptive time division duplexing method and apparatus for dynamic bandwidth allocation within wireless communication system |
| CN1498461A (en) * | 2001-02-06 | 2004-05-19 | ���﹫˾ | System and method for dynamic bandwidth allocation |
| CN1553647A (en) * | 2003-06-03 | 2004-12-08 | 华为技术有限公司 | Method for building permanent virtual connection |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282493A (en) * | 1997-11-19 | 2001-01-31 | 通信集合公司 | An adaptive time division duplexing method and apparatus for dynamic bandwidth allocation within wireless communication system |
| CN1498461A (en) * | 2001-02-06 | 2004-05-19 | ���﹫˾ | System and method for dynamic bandwidth allocation |
| CN1553647A (en) * | 2003-06-03 | 2004-12-08 | 华为技术有限公司 | Method for building permanent virtual connection |
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