CN100361482C

CN100361482C - Method for making received number protection in media gateway control protocol

Info

Publication number: CN100361482C
Application number: CNB031013376A
Authority: CN
Inventors: 吴永吉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2003-01-03
Filing date: 2003-01-03
Publication date: 2008-01-09
Anticipated expiration: 2023-01-03
Also published as: CN1516420A

Abstract

The present related to a method for carrying out number reception protection in the H. 248 protocol, which belongs to the technical field of communication. In the method, number detection packages in the H. 248 protocol are extended; the parameter of the maximal replication frequency of a wildcard character denoting that the previous number or character is repeated for optional times is added; or the maximal replication frequency qualifier of the wildcard character is added in a dialing detection figure (DM); a medium gateway controller (MGC) sends mould plates with the dialing detection figure (DM) of the wildcard character to medium gateways (MG); the medium gateways (MG) limit dialing numbers according to the mould plates of the dialing detection figure (DM) and the maximal replication frequency of the wildcard character and report numbers conforming to the conditions. The present invention provides a method for conveniently and effectively carrying out number reception protection, which not only relieves the processing burden of MG sides, but also provides large control strength to MG for MGC and eliminates the incipient faults of systems.

Description

A kind of method of the protection that in MGCP, collects the digits

Technical field

The present invention relates to communication technical field, relate in particular to a kind of method of the protection that in MGCP (H.248), collects the digits.

Background technology

MGCP (H.248) is a kind of principal and subordinate's control protocol, its core concept is that the processing with professional (for example calling out) control procedure and professional related media streams (for example voice flow) separates, be Media Gateway Controller (MGC, Media Gateway Controller) side is finished professional control, and media gateway (MG, Media Gateway) side is finished the Media Stream processing, like this, can just customize miscellaneous service fast by only revising MGC one side.

MGC detects figure (DM by dialing, Digit Map) how indication MG (as IAD, residential gateway) detects subscriber dialing and the number that the user dials is reported, each DM detects template by a unique name and one group of dialing and forms, dialing detects between the template is separated by " | ", dialing detects template by 0-9 and the character string formed of the letter between the A-K and two special wild-characters " X " and ". " at most, any one numeral that wild-character " X " can wildcard 0-9; Wild-character ". " expression repeats 0 to arbitrarily time with the numeral of its front or character, and for example, " 13. " can be represented: 1,13,133,1333 etc.

Suppose that MGC wants to limit MG and can only dial telephone number between the 26540000-26549999, MGC can dynamically issue a DM dialing and detect template " 2654XXXX " to MG, if the user dials 2-6-5-4=0=8=0=8, the number that MG dials the user sequentially with template in the number of correspondence position more all meet, then MG reports MGC with this number series.

Dialing for random length is handled, and maximum 15 bit digital of international number 0091+ that need dial with the user are example, and prior art is assigned following DM dialing by MGC and detected template:

MG detects template group relatively by number and the above-mentioned number that will receive, qualified number is reported, but this method of prior art has increased the length of interactive messages between MG and the MGC, may send out and does not go out owing to the restriction of system, and increase the processing expenditure of MG side.

Prior art also can be assigned the DM dialing that has asterisk wildcard ". " to MG by MGC and detect template: " 0091X. ", MG detects template group relatively with number and the above-mentioned number of receiving, qualified number is reported.But adopt this method, can't limit the number of repetition of asterisk wildcard ". ", MGC has no idea dynamically to notify MG to detect the maximum length of number, all is legal if the user dials the number of dialling random length after 0091, and like this, there is hidden danger in system.

Summary of the invention

Technical problem to be solved by this invention is: overcome when dialing detects template use asterisk wildcard ". " in the prior art; can't limit the hidden danger that the number of repetition of asterisk wildcard ". " is brought; a kind of number of repetition that limits asterisk wildcard ". " in MGCP is provided; thereby the method for the protection that collects the digits easily and effectively; not only alleviate the processing burden of MG side; and make MGC to control MG better, eliminated system's hidden danger.

The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:

The method of this protection that collects the digits in MGCP may further comprise the steps:

A, the number in the MGCP is detected bag expand, expression is repeated previous numeral or character asterisk wildcard arbitrarily time increases maximum number of repetitions parameter (maxdotrepeat); Perhaps, detect among the figure (DM) this asterisk wildcard increase maximum number of repetitions qualifier in dialing;

B, Media Gateway Controller (MGC) assign dialing detection figure (DM) template that has described asterisk wildcard for media gateway (MG);

C, media gateway (MG) limit dialling in number according to the maximum number of repetitions that dialing detects figure (DM) template and described asterisk wildcard, and qualified number is reported.

Described maximum number of repetitions parameter or qualifier can be made amendment by order by Media Gateway Controller (MGC).

The type of described maximum number of repetitions parameter is an integer, and span is 0～65535.

Described dialing detects and also has expression in figure (DM) template numeral is carried out the asterisk wildcard of wildcard, and wildcard is carried out in described expression to numeral wildcard bit is before described expression repeats previous numeral or character asterisk wildcard arbitrarily time.

If media gateway (MG) does not support described number through expansion to detect bag, then return error code " 460 " to Media Gateway Controller (MGC).

Beneficial effect of the present invention is: the present invention is directed to when Media Gateway Controller in the prior art (MGC) assigns dialing detection figure (DM) for media gateway (MG) and can not limit the hidden danger that ". " asterisk wildcard number of repetition may be brought, made full use of the extension mechanism of MGCP (H.248), the detection bag (Package) of checking numbers expands, detect the maximum number of repetitions parameter (maxdotrepeat) that adds asterisk wildcard ". " in the bag at number, by this parameter, make MGC can effectively control the maximum times that asterisk wildcard ". " repeats among the MG; Perhaps also can detect the maximum number of repetitions qualifier that increases asterisk wildcard ". " among the figure (DM) in dialing and come the maximum number of repetitions of asterisk wildcard ". " is limited by revising H.248 agreement.Like this, utilize the present invention, not only can alleviate the processing burden of MG side by asterisk wildcard ". ", and by the restriction to asterisk wildcard ". " number of repetition, provide bigger control dynamics to MGC, disappeared except when the hidden danger that the user may bring system when dialing long number to MG.

Embodiment

Below in conjunction with embodiment the present invention is described in further detail:

When the DM dialing of assigning for media gateway (MG) when Media Gateway Controller (MGC) detects template and has asterisk wildcard " X " and asterisk wildcard ". ", as: " 0091X. ", since asterisk wildcard " X " can wildcard 0-9 any one numeral, and asterisk wildcard ". " expression is arrived the numeral or the character repetition 0 of its front inferior arbitrarily, thereby the user dials the numeral that can dial after 0091 between the 0-9 any time, in the prior art, MGC has no idea dynamically to notify MG to detect the maximum length of number, therefore, the user to dial the number of dialling random length after 0091 all be legal.

Because changing H.248, agreement is difficult to, thereby the present invention seeks solution on the extension mechanism of agreement H.248, H.248 the extension mechanism of agreement is a bag (Package), bag is the set of the attribute among the MG, identifier sign by unique has defined parameter and processing procedure thereof in the bag, each parameter is by unique parameter identifier sign, can expand new bag of definition to existing bag, the bag of redetermination can be inherited all properties of original bag.

The present invention will be H.248 number in the agreement detect bag and expand, add the represented maximum number of repetitions parameter of asterisk wildcard ". ", i.e. maxdotrepeat parameter, the type of this parameter is an integer, span is 0～65535.

MGC can be maximum number of repetitions (for example 15) with this parameter modification by any order (as Modify), like this, just can limit the number of times that asterisk wildcard ". " repeats, thereby limited subscriber can only dial 15 numerals between the 0-9 at most after dialing international number 0091.

When carrying out the dialing processing, MGC assigns the DM dialing that has described asterisk wildcard ". " to MG and detects template, and MG compares number and this DM dialing detection template of receiving, qualified number is reported; If MG does not support this bag, then return error code " 460 ".

The present invention also can increase new asterisk wildcard ". " qualifier and come the maximum number of repetitions of asterisk wildcard ". " is limited by revising H.248 agreement in DM, can reach same effect.

Like this, utilize the present invention, not only can alleviate the processing burden of MG side by asterisk wildcard ". ", and by the restriction to asterisk wildcard ". " number of repetition, provide bigger control dynamics to MGC, disappeared except when the hidden danger that the user may bring system when dialing long number to MG.

Claims

One kind in MGCP, collect the digits the protection method, may further comprise the steps:

A, the number in the MGCP is detected bag expand, expression is repeated previous numeral or character asterisk wildcard arbitrarily time increases maximum number of repetitions parameter (maxdotrepeat); Perhaps, detect among the figure (DM) this asterisk wildcard increase maximum number of repetitions qualifier in dialing;

B, Media Gateway Controller (MGC) assign dialing detection figure (DM) template that has described asterisk wildcard for media gateway (MG);

C, media gateway (MG) limit dialling in number according to the maximum number of repetitions that dialing detects figure (DM) template and described asterisk wildcard, and qualified number is reported.
2. the method for the protection that collects the digits in MGCP according to claim 1, it is characterized in that: described maximum number of repetitions parameter or qualifier can be made amendment by order by Media Gateway Controller (MGC).
3. the method for the protection that collects the digits in MGCP according to claim 1 and 2, it is characterized in that: the type of described maximum number of repetitions parameter is an integer, and span is 0～65535.
4. the method for the protection that in MGCP, collects the digits according to claim 1 and 2; it is characterized in that: described dialing detects and also has expression in figure (DM) template numeral is carried out the asterisk wildcard of wildcard, and wildcard is carried out in described expression to numeral wildcard bit is before described expression repeats previous numeral or character asterisk wildcard arbitrarily time.
5. the method for the protection that in MGCP, collects the digits according to claim 1; it is characterized in that:, then return error code " 460 " to Media Gateway Controller (MGC) if media gateway (MG) does not support described number through expansion to detect bag.