CN101175069A - Method and network appliance for adjusting channel associated signalling interface - Google Patents
Method and network appliance for adjusting channel associated signalling interface Download PDFInfo
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Abstract
The invention provides an adjusting method of CAS (Channel Associated Signaling) interface, which comprises: A. receiving a first CAS; B. recognizing the first CAS; C. adjusting a second CAS according to the recognizing result of procedure B; D. transferring the first CAS at the interface of the adjusted second CAS. Additionally, the invention also provides a network device for adjusting CAS interface. The invention is capable of realizing R1.5 CAS through adjusting (repeating/reusing/expanding) H.248 CAS interface, which reduces the quantity of private signaling interfaces with the simple and efficient adjusting work of signaling interface.
Description
Technical field
The present invention relates to the channel associated signalling interface technical field, especially relate to a kind of method and network equipment of adjusting channel associated signalling interface.
Background technology
At next generation network (Next Generation Network, abbreviation NGN) in system and third generation network (3G) system, in order to develop the needs of large-scale carrier class IP phone gateway, gateway is decomposed into media gateway (Media Gateway, be called for short MG) and Media Gateway Controller (Media Gateway Controller, be called for short MGC), realize that carrying and control are separated.
ITU-T had proposed MGCP in the 16th task group meeting in 2000, i.e. agreement H.248, it is MGCP (Media Gateway Control Protocol in early days, abbreviation MGCP) improves on the basis and form, and replace the MGCP agreement gradually, become the standard agreement between media gateway and the Media Gateway Controller.
H.248, channel associated signalling (Channel Associated Signaling has been described in the agreement, be called for short CAS) interface protocol, these channel associated signalling interface agreements comprise the definition of many packet (Package), such as, bcas packet, osext packet, oses packet, r2 packet and bcasaddr packet etc.These packets are applicable to R1 signaling system, R2 signaling system, No.5 signaling system, and the interface that can be used as line signalling and register signaling between media gateway and the Media Gateway Controller, such as, the r2 packet is mainly used in the register signaling interface in the R2 signaling, the bcasaddr packet can be used for the register signaling interface in the R1 signaling, the bcas packet is used for the line signalling interface of R2 signaling, and osext packet and oses packet are used for the line signalling operator.
Various countries all can define the channel associated signalling system of oneself usually, and Russia is no exception, and Russian channel associated signalling is a protocol family, all claims the R1.5 signaling system, and it is the provincialism channel associated signalling standard of generally using in Russia and the former Soviet Union area.The R1.5 signaling is the protocol system of a complexity, comprises line signalling and register signaling two parts, and each several part has a lot of subtypes again, is divided into different circuit typess again according to the difference of office's type.Be divided into such as line signalling: CAS1, CAS2,1VF etc.; Register signaling is divided into: MFS, MGP1, MFP2, MFT, DP etc.; Circuit types is divided into: CL, TL, OCL, TCL etc.Between all types of or all types of inside can be made up again, forms very complicated application scenarios.Such as CL_CAS1_MFS, OCL_CAS2_MFP1, TCL_1VF_MFS_DP etc.
Because it is widely different between R1.5 signaling and R1 signaling and the R2 signaling, cause the R1.5 signaling H.248 can't well shone upon on the agreement, make agreement H.248 with the road interface can't be directly as the control interface of R1.5 signaling, therefore, carrying and controlling under the framework that is separated, the R1.5 signaling system can't be achieved according to the channel associated signalling interface in the existing H.248 agreement.
Therefore, we are necessary on the basis of the channel associated signalling interface that agreement H.248 provides, and make improvements, exploitation etc., it is widened be applied to the R1.5 signaling standard.
Summary of the invention
Technical problem to be solved by this invention is, a kind of method and network equipment of adjusting channel associated signalling interface is provided, to realize the R1.5 channel associated signalling existing on H.248 with the signaling interface on road.
For solving the problems of the technologies described above, the present invention discloses a kind of method of adjusting channel associated signalling interface, comprises the steps:
A, reception one first kind channel associated signalling;
B, the described first kind channel associated signalling of identification;
C, adjust one second class channel associated signalling interface according to the recognition result among the step B;
D, on the interface of the described adjusted second class channel associated signalling, transmit described first kind channel associated signalling.
Preferably, described step B further comprises:
The first kind channel associated signalling that received and reuse channel associated signalling set, the set of multiplexing channel associated signalling and the set of expansion channel associated signalling corresponding to the second class channel associated signalling interface of first kind channel associated signalling that preset are compared respectively, determine that the first kind channel associated signalling that is received belongs to wherein a certain channel associated signalling set.
Preferably, described step C is specially:
Belong to the described channel associated signalling set of reusing if recognition result is first channel associated signalling that is received, then reuse the corresponding interface of the described second class channel associated signalling;
If being first channel associated signalling that is received, recognition result belongs to described multiplexing channel associated signalling set, the corresponding interface of the then multiplexing described second class channel associated signalling;
Belong to described expansion channel associated signalling set if recognition result is first channel associated signalling that is received, then expand the corresponding interface of the described second class channel associated signalling.
Preferably, described first kind channel associated signalling is the R1.5 signaling; The described second class signaling is channel associated signalling H.248, comprises in R1 signaling, R2 signaling and the No.5 signaling at least a.
Correspondingly, the present invention also provides a kind of network equipment of adjusting channel associated signalling interface, comprising:
Receiving element is used to receive first kind channel associated signalling;
Memory cell is used to store reusing channel associated signalling set, the set of multiplexing channel associated signalling and expanding the channel associated signalling set of the second class channel associated signalling interface corresponding with first kind channel associated signalling;
Recognition unit is used for discerning a certain channel associated signalling set that first kind channel associated signalling that described receiving element receives belongs to described memory cell;
Adjustment unit is used for the recognition result according to described recognition unit, adjusts the pairing interface of the second class channel associated signalling;
Transmitting element is used for described first kind channel associated signalling is being sent on the adjusted interface of described adjustment unit.
Preferably, described adjustment unit further comprises:
Reuse subelement, the recognition result that is used at described recognition unit is that the first kind channel associated signalling that is received belongs to when reusing the channel associated signalling set, reuses the corresponding interface of the described second class channel associated signalling;
When multiplexing subelement, the first kind channel associated signalling that is used for recognition result at described recognition unit and is to be received belong to multiplexing channel associated signalling set, the corresponding interface of the multiplexing described second class channel associated signalling;
The expansion subelement when first kind channel associated signalling that is used for recognition result at described recognition unit and is to be received belongs to the set of expansion channel associated signalling, is expanded the corresponding interface of the described second class channel associated signalling.
Preferably, described first kind channel associated signalling is the R1.5 signaling; The described second class signaling is channel associated signalling H.248, comprises in R1 signaling, R2 signaling and the No.5 signaling at least a.
Preferably, the described signaling collection of reusing comprises: the bcas/sd in the bcas packet, bcas/ans, bcas/cf, bcas/cb and bcas/casf signal and incident, or r2/r2f incident and signal in the r2 packet, or bcasaddr/casf incident and signal in the bcasaddr packet.
Preferably, described multiplexing signaling collection comprises: the bcas/sz in the bcas packet and bcas/addr signal and incident, or the r2/r2addr in the r2 packet, r2/cprs and r2/cng incident and signal, or bcasaddr/addr incident and signal in the bcasaddr packet.
Preferably, described expanded signalling collection comprises: bcas/ani_req signal of expanding in the bcas packet and incident, bcas/ani_rmv signal and incident, bcas/free signal and incident, bcas/busy signal and incident, bcas/secdialtone and bcas/anstransfer, or the osext/ring_req signal of expanding in the osext packet and incident, osext/ring_rmv signal and incident.
Implement the present invention, have following beneficial effect:
The present invention is the interface standard according to the first kind (R1.5) channel associated signalling, and with reference to the signaling interface standard of second class (H.248) with the road, interface to second class (H.248) channel associated signalling is adjusted (reusing/multiplexing/expand), to realize the transmission and the application of the first kind (R1.5) channel associated signalling on second class (H.248) channel associated signalling interface; The principle that the present invention adjusts with the signaling interface on road second class (H.248) is: reuse with the first kind (R1.5) and describe identical part signaling interface, multiplexing and the first kind (R1.5) is described similar part signaling interface, the expansion first kind (R1.5) with the road exclusive part signaling interface, reduced the quantity of privately owned signaling interface like this, and made the work of adjusting signaling interface simply efficient.
Description of drawings
Fig. 1 is the structural representation that the present invention adjusts the network equipment of channel associated signalling interface;
Fig. 2 is the schematic flow sheet that the present invention adjusts the method for channel associated signalling interface.
Embodiment
Core concept of the present invention be by reuse, multiplexing and the expansion method, with the R1.5 signaling with H.248 the signaling interface with the road is corresponding, carry and control under the framework that is separated thereby be implemented in, realize R1.5 channel associated signalling system according to the channel associated signalling interface in the existing H.248 agreement.
Please refer to shown in Figure 1ly, the present invention adjusts the structural representation of the network equipment of channel associated signalling interface; The network equipment of the present invention can be a media gateway, or Media Gateway Controller, perhaps is an independent device.The described network equipment comprises: receiving element 10, memory cell 11, recognition unit 12, adjustment unit 13 and transmitting element 14.Wherein,
Receiving element 10 is used to receive the R1.5 channel associated signalling;
Reuse channel associated signalling set, the set of multiplexing channel associated signalling and the expansion channel associated signalling of the H.248 channel associated signalling interface that memory cell 11 storages are corresponding with the R1.5 channel associated signalling are gathered;
Specifically, adjustment unit 13 further comprises reuses subelement 130, multiplexing subelement 132 and expansion subelement 134, wherein:
When multiplexing subelement 132, the R1.5 channel associated signalling that is used for recognition result at described recognition unit 12 and is to be received belong to multiplexing channel associated signalling set, the pairing interface of multiplexing H.248 channel associated signalling;
The R1.5 channel associated signalling that transmitting element 14 is used for being received sends on adjusted interface.
Described herein reusing, be meant for H.248 identical part R1.5 channel associated signalling is described with the part signaling on road, directly with described H.248 with the interface of this part signaling on road as the interface of R1.5 with road counterpart signaling;
Described herein multiplexing, be meant for H.248 part R1.5 channel associated signalling similar but that there are differences is described with the part signaling on road, H.248 revise the back as the interface of R1.5 with described with road counterpart signaling with the interface of this part signaling on road;
Expansion described herein is meant for describing not similar part R1.5 channel associated signalling both inequality also with all signalings with the road H.248, then on H.248 with the signaling interface on road expansion R1.5 with this part signaling interface on road.
Specifically, the interface adjustment of 13 pairs of received R1.5 channel associated signallings of aforementioned adjustment unit comprises: to H.248 with the defined bcas packet of interface protocol and the osext packet of the line signalling on road, and to H.248 carrying out the r2 packet and the bcasaddr packet is adjusted with the interface protocol of the register signaling on road is defined.
Adjustment for bcas packet and osext packet comprises:
Bcas/sz and bcas/addr incident and signal in the multiplexing described bcas packet;
Reuse other incidents and signal in the described bcas packet;
In described bcas packet, expand bcas/ani, bcas/free, bcas/busy, bcas/secdialtone and bcas/anstransfer incident and signal; And
Reuse the incident and the signal that comprise in the osext packet, and expand osext/ring_req and osext/ring_rmv incident and signal.
Wherein, the adjustment of described bcas packet and described osext packet is specific as follows:
1.bcas packet
-multiplexing bcas/sz signal is used to issue and takies, and spreading parameter is represented local or long-distance;
-multiplexing bcas/sz incident is used for detecting and reporting taking, and its parameter is identical with being provided with of bcas/sz signal;
-multiplexing bcas/addr signal is used for DP and issues address digit;
-multiplexing bcas/addr incident is used for DP and detects and report address digit;
-expansion bcas/ani_req signal is used to issue the ani request, and spreading parameter is represented "Yes" or "No";
-expansion bcas/ani_req incident is used for detecting and reports the ani request, and its parameter is with identical with being provided with of bcas/ani_req signal;
-expansion bcas/ani_rmv signal is used to issue the ani cancellation, and spreading parameter is represented "Yes" or "No";
-expansion bcas/ani_rmv incident is used for detecting and reports the ani cancellation, and its parameter is identical with being provided with of bcas/ani_rmv signal;
-expansion bcas/free signal is used to issue the called free time;
-expansion bcas/free incident is used for detecting and reporting the called free time;
-expansion bcas/busy signal is used to issue Called Busy, and spreading parameter is represented local or long-distance;
-expansion bcas/busy incident is used for detecting and reporting Called Busy, and its parameter is identical with being provided with of bcas/busy signal;
-expansion bcas/secdialtone is used for detecting and reporting secondary dial tone;
-expansion bcas/anstransfer is used for detecting and reports answer to transmit indication.
Illustrate: bcas/sz, bcas/addr incident and the signal of this packet except being re-used, other signals and incident in the packet are all reused, as bcas/sd, bcas/ans, bcas/cf, bcas/cb, bcas/casf etc., all can directly be used in the interface of Russian channel associated signalling.Wherein, signal and incident multiplexing and expansion are the peculiar signaling interface part of Russian channel associated signalling.
2.osext packet
-expansion osext/ring_req signal is used to issue ring, and spreading parameter is represented the ring mode;
-expansion osext/ring_req incident is used for detecting or reporting ring, and its parameter is identical with being provided with of osext/ring_req signal;
-expansion osext/ring_rmv signal is used to issue the ring cancellation, and its parameter is identical with being provided with of osext/ring_req;
-expansion osext/ring_rmv incident is used for detecting or reporting ring, and its parameter is identical with being provided with of osext/ring_req signal.
Illustrate: other signals and incident in this packet are all reused, and can directly be used in the interface of Russian channel associated signalling; Osext/ring_req that expands in this packet and osext/ring_rmv incident and signal are because Russian with the peculiar signaling interface part in road.
Adjustment for r2 packet and bcasaddr packet comprises:
Reuse r2/r2f incident and signal in the described r2 packet;
R2/r2addr, r2/cprs and r2/cng incident and signal in the multiplexing described r2 packet;
Reuse bcasaddr/casf incident and signal in the described bcasaddr packet;
Bcasaddr/addr incident and signal in the multiplexing described bcasaddr packet.
Wherein, in register signaling interface H.248, as follows to the concrete adjustment of described r2 packet and described bcasaddr packet with the road:
1.r2 packet
-multiplexing r2/r2addr signal is used to issue MFS, MFP1, MFP2 address information, and the parameter when being applied to each register(system) is done following specific (special) requirements:
When being applied to the MFS register(system), only use wherein di and sc parameter, wherein, parameter d i is used to issue called number, and parameter s c is used to issue type of call;
When being applied to the MFP1 register(system), only use di parameter wherein, this parameter d i is used for issuing number series by the MFP1 signaling format;
When being applied to the MFP2 register(system), only use di parameter wherein, this parameter d i is used for issuing number series by the MFP2 signaling format, wherein, can comprise a plurality of sub-number series in the number series;
-multiplexing r2/r2addr incident is used to issue and detects MFS, MFP1, MFP2 address information, and its parameter is identical with being provided with of r2/r2addr signal;
-multiplexing r2/cprs signal is used for MFS, MFP1, MFP2 issues called subscriber's line states, and the parameter when being applied to each register(system) is done following specifically defined:
When being applied to the MFS register(system), can represent the called free time, busy, congested, change DP, do not receive information etc.;
When being applied to the MFP1 register(system), can represent the number correctness;
When being applied to the MFP2 register(system), can represent wait, release etc.;
-multiplexing r2/cprs incident is used for MFS, MFP1, MFP2 detects and report called subscriber's line states, and its parameter is provided with identical with the r2/cprs signal;
-multiplexing r2/cng is used for the MFP2 detection and reports congested.
Illustrate: this packet is except r2/r2addr, the r2/cprs, r2/cng incident and the signal that are re-used, and incident r2/r2f can be reused.
2.bcasaddr packet
-multiplexing bcasaddr/addr signal only is used for the MFT register(system) and issues calling number (other register(system)s use the r2 packet, be convenient to MG like this MFT register(system) and other register(system)s are distinguished);
-multiplexing bcasaddr/addr incident only is used for the MFT register(system) and detects and report calling number.
Illustrate: this packet is except the bcasaddr/addr incident and signal that are re-used, and incident bcasaddr/casf can be reused.
Reuse signaling set, the set of multiplexing signaling and the expanded signalling set of therefore, being stored in memory cell 11 are respectively:
Reusing the signaling set comprises: other signals in the bcas packet except that bcas/sz, bcas/addr incident and signal and incident (bcas/sd, bcas/ans, bcas/cf, bcas/cb and bcas/casf signal and incident), or other signals and the incident except that osext/ring_req, osext/ring_rmv incident and signal in the osext packet, or r2/r2f incident and signal in the r2 packet, or bcasaddr/casf incident and signal in the bcasaddr packet.
Multiplexing signaling set comprises: the bcas/sz in the bcas packet and bcas/addr signal and incident, or the r2/r2addr in the r2 packet, r2/cprs and r2/cng incident and signal, or bcasaddr/addr incident and signal in the bcasaddr packet.
The expanded signalling set comprises: bcas/ani_req signal of expanding in the bcas packet and incident, bcas/ani_rmv signal and incident, bcas/free signal and incident, bcas/busy signal and incident, bcas/secdialtone and bcas/anstransfer, or the osext/ring_req signal of expanding in the osext packet and incident, osext/ring_rmv signal and incident.
Correspondingly, the present invention also provides a kind of method of adjusting channel associated signalling interface, sees also the flow chart that the present invention illustrated in fig. 2 adjusts the method for channel associated signalling interface.
Step S200: receive the R1.5 channel associated signalling;
Step S202: the R1.5 channel associated signalling of discerning this reception, reuse channel associated signalling set, the set of multiplexing channel associated signalling and the expansion channel associated signalling that are about to R1.5 channel associated signalling that this will receive the H.248 channel associated signalling interface corresponding with predefined and R1.5 channel associated signalling are gathered and are compared, and determine which signaling it belongs to and gather; Be specially:
Step S204: whether the R1.5 channel associated signalling of judging this reception belongs to is reused channel associated signalling set (reusing the existing in front explanation of the signaling type that comprises with the road set), if judged result is for being, then in step S206, reuse the H.248 corresponding interface of channel associated signalling, and go to step S214; If judged result then goes to step S208 for not;
Step S208: whether the R1.5 channel associated signalling of judging this reception belongs to multiplexing channel associated signalling set (the existing in front explanation of the multiplexing signaling type that comprises with the road set), if judged result is for being, the corresponding interface of multiplexing H.248 channel associated signalling in step S210 then, and go to step S214; If judged result then goes to step S212 for not;
Step S212: judge through above-mentioned determining step that the R1.5 channel associated signalling of this reception does not promptly belong to and reuse channel associated signalling set, do not belong to multiplexing channel associated signalling set yet, then it should belong to expansion with road set (the existing in front explanation of signaling type that expansion comprises with the road set), then expands the H.248 corresponding interface of channel associated signalling;
Step S214:, on the interface of adjusted channel associated signalling, transmit described R1.5 channel associated signalling to after H.248 the corresponding interface of channel associated signalling is adjusted (reusing/multiplexing/expand).
Compared with prior art, the present invention has following useful technique effect:
The present invention is the interface standard according to the R1.5 channel associated signalling, and with reference to H.248 with the signaling interface on road Standard (H.248 consensus standard) is adjusted (reusing/multiplexing/expand) to the interface of channel associated signalling H.248, To realize the R1.5 channel associated signalling under the network architecture that is separated in control and carrying; The present invention to H.248 with The principle that the signaling interface on road is adjusted is: reuses with R1.5 and describes identical part signaling interface, and multiple With describing similar part signaling interface with R1.5, R1.5 is with the exclusive part signaling interface in road in expansion, Reduced like this quantity of privately owned signaling interface, and made the work of adjusting signaling interface simply efficient.
Claims (10)
1. a method of adjusting channel associated signalling interface is characterized in that, this method comprises the steps:
A, reception one first kind channel associated signalling;
B, the described first kind channel associated signalling of identification;
C, adjust one second class channel associated signalling interface according to the recognition result among the step B;
D, on the interface of the described adjusted second class channel associated signalling, transmit described first kind channel associated signalling.
2. the method for adjustment channel associated signalling interface as claimed in claim 1 is characterized in that, described step B is specially:
The first kind channel associated signalling that received and reuse channel associated signalling set, the set of multiplexing channel associated signalling and the set of expansion channel associated signalling corresponding to the second class channel associated signalling interface of first kind channel associated signalling that preset are compared the channel associated signalling set under the first kind channel associated signalling of determining to be received respectively.
3. the method for adjustment channel associated signalling interface as claimed in claim 1 is characterized in that, described step C is specially:
Belong to the described channel associated signalling set of reusing if recognition result is first channel associated signalling that is received, then reuse the corresponding interface of the described second class channel associated signalling;
If being first channel associated signalling that is received, recognition result belongs to described multiplexing channel associated signalling set, the corresponding interface of the then multiplexing described second class channel associated signalling;
Belong to described expansion channel associated signalling set if recognition result is first channel associated signalling that is received, then expand the corresponding interface of the described second class channel associated signalling.
4. as the network equipment of each described adjustment channel associated signalling interface of claim 1 to 3, it is characterized in that described first kind channel associated signalling is the R1.5 signaling; The described second class signaling is channel associated signalling H.248, comprises in R1 signaling, R2 signaling and the No.5 signaling at least a.
5. a network equipment of adjusting channel associated signalling interface is characterized in that, comprising:
Receiving element is used to receive first kind channel associated signalling;
Memory cell is used to store reusing channel associated signalling set, the set of multiplexing channel associated signalling and expanding the channel associated signalling set of the second class channel associated signalling interface corresponding with first kind channel associated signalling;
Recognition unit is used for discerning a certain channel associated signalling set that first kind channel associated signalling that described receiving element receives belongs to described memory cell;
Adjustment unit is used for the recognition result according to described recognition unit, adjusts the pairing interface of the second class channel associated signalling;
Transmitting element is used for described first kind channel associated signalling is being sent on the adjusted interface of described adjustment unit.
6. the network equipment of adjustment channel associated signalling interface as claimed in claim 5 is characterized in that, described adjustment unit further comprises:
Reuse subelement, the recognition result that is used at described recognition unit is that the first kind channel associated signalling that is received belongs to when reusing the channel associated signalling set, reuses the corresponding interface of the described second class channel associated signalling;
When multiplexing subelement, the first kind channel associated signalling that is used for recognition result at described recognition unit and is to be received belong to multiplexing channel associated signalling set, the corresponding interface of the multiplexing described second class channel associated signalling;
The expansion subelement when first kind channel associated signalling that is used for recognition result at described recognition unit and is to be received belongs to the set of expansion channel associated signalling, is expanded the corresponding interface of the described second class channel associated signalling.
7. the network equipment of adjustment channel associated signalling interface as claimed in claim 6 is characterized in that, described first kind channel associated signalling is the R1.5 signaling; The described second class signaling is channel associated signalling H.248, comprises in R1 signaling, R2 signaling and the No.5 signaling at least a.
8. as the network equipment of each described adjustment channel associated signalling interface of claim 5 to 7, it is characterized in that, the described signaling collection of reusing comprises: the bcas/sd in the bcas packet, bcas/ans, bcas/cf, bcas/cb and bcas/casf signal and incident, or r2/r2f incident and signal in the r2 packet, or bcasaddr/casf incident and signal in the bcasaddr packet.
9. as the network equipment of each described adjustment channel associated signalling interface of claim 5 to 7, it is characterized in that, described multiplexing signaling collection comprises: the bcas/sz in the bcas packet and bcas/addr signal and incident, or the r2/r2addr in the r2 packet, r2/cprs and r2/cng incident and signal, or bcasaddr/addr incident and signal in the bcasaddr packet.
10. as the network equipment of each described adjustment channel associated signalling interface of claim 5 to 7, it is characterized in that, described expanded signalling collection comprises: bcas/ani_req signal of expanding in the bcas packet and incident, bcas/ani_rmv signal and incident, bcas/free signal and incident, bcas/busy signal and incident, bcas/secdialtone and bcas/anstransfer, or the osext/ring_req signal of expanding in the osext packet and incident, osext/ring_rmv signal and incident.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739878A (en) * | 2011-04-12 | 2012-10-17 | 中兴通讯股份有限公司 | Method for acquiring calling information under soft switching architecture and next generation network (NGN) system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7675900B1 (en) * | 2000-10-09 | 2010-03-09 | Genband Inc. | System and method for interfacing between signaling protocols |
| US6775373B2 (en) * | 2001-06-14 | 2004-08-10 | Ericsson Inc. | System for and method of channel associated signaling backhaul in a routing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739878A (en) * | 2011-04-12 | 2012-10-17 | 中兴通讯股份有限公司 | Method for acquiring calling information under soft switching architecture and next generation network (NGN) system |
| CN102739878B (en) * | 2011-04-12 | 2015-01-28 | 中兴通讯股份有限公司 | Method for acquiring calling information under soft switching architecture and next generation network (NGN) system |
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