KR20020095510A - Method for IAD subscriber accommodating of CCS type in VoDSL gateway - Google Patents

Abstract

PURPOSE: A method for receiving CCS(Common Channel Signaling)-type IAD(Integrated Access Device) subscribers in a VoDSL(Voice over Digital Subscriber Line) gateway is provided to change contents of a standard 'AF-VMOS-0145.000' to transmit a message between an IAD and an LE(Local Exchange) in the VoDSL gateway, thereby stably supplying a call processing service. CONSTITUTION: If a VoDSL gateway(200) receives a V5.2 PSTN message from an IAD(100), the VoDSL gateway(200) maps IAD subscriber port information to V5.2 subscriber port information among information elements included in the V5.2 PSTN message in reference to a PSTN subscriber port mapping table agreed between the IAD(100) and an LE(300), and transmits the mapped information to the LE(300). When the V5.2 PSTN message is received from the LE(300) which performs an operation according to the V5.2 PSTN message, the VoDSL gateway(200) maps V5.2 subscriber information to the IAD subscriber port information among the information elements in reference to a PSTN subscriber port mapping table, and transmits the mapped information to the IAD(100).

Description

Method for IAD subscriber accommodating of CCS type in VoDSL gateway}

The present invention relates to a method for accepting a CCS type IAD subscriber in a VoDSL gateway. In particular, the present invention relates to a Common Channel Signaling (ICS) type integrated channel in a Voice over Digital Subscriber Line (VODSL) gateway using a V5.2 message relay. Access Device) The present invention relates to a CCS type IAD subscriber acceptance method in a VoDSL gateway that can accommodate subscribers.

In general, the standard AF-VMOA-0145.000 proposes a way for the VoDSL gateway to accommodate CCS-type IAD subscribers. The V5.2 protocol specification (ETS ETSI) is a protocol for the VoDSL gateway to interwork with LE (Local Exchange). 300 324-1, ETS ETSI 300 347-1), and V5.2 protocol specifications (ETS ETSI 300 324-1, ETS ETSI 300 347-1) are also proposed for call processing between VoDSL gateways and IADs. .

1 is a road showing a schematic structure of a conventional VoDSL gateway. As shown in FIG. 1, in the standard AF-VMOA-0145.000, the VoDSL gateway 20 is a public switched telephone network proposed by the V5.2 protocol standard. It proposes to accept both the Local Exchange (LE) side and the Access Network (AN) side of the BRC protocol and the Bearer Channel Connection protocol.

As described above, the reason why the VoDSL gateway 20 should accommodate both the LE side and AN side protocols of the PSTN protocol and the BCC protocol proposed in the V5.2 protocol standard is because the V5.2 protocol is between LE and AN. As an interface standard for providing various services in the VoDSL gateway 20, a VoDSL gateway is used to transmit and receive V5.2 messages using the V5.2 protocol and the CCS type IAD 10 in which the AN protocol standard is accepted. Relevant standards for LE side function processing must be accepted, and VoDSL gateway 20 accepts relevant standards for AN side function processing in order to send and receive V5.2 messages using the LE 30 and V5.2 protocols. Because you have to.

In addition, the VoDSL gateway 20 includes a finite state machine (FSM) for performing call processing as the logical states proceed. As described above, the VoDSL gateway 20 has a LE side of the PSTN protocol and the BCC protocol in the VoDSL gateway 20. Since both the AN side protocol and the AN side protocol are accommodated, the FSM also includes the LE side and the AN side separately.

In addition, the VoDSL gateway 20 includes a system management (SM) for matching state transitions between the LE FSM and the AN FSM.

Figure 2 is a road showing the basic protocol structure of the VoDSL gateway, as shown in Figure 2, in order to accommodate the CCS-type IAD subscribers, the VoDSL gateway 20 is another protocol required for accepting the CCS-type IAD in addition to the V5.2 protocol. That is, ATM access management, DTMF conversion, Annex K, Annexes AI, I.366.1 TED, I.366.2, AAL2 CPS, ATM, DSS2, SAAL.

3 is a diagram illustrating a message flow between a conventional LE and a VoDSL gateway and a message flow between an IAD and a VoDSL gateway.

First, the V5.2 PSTN message transmitted from the CCS type IAD 10 is first received by the LE FSM of the VoDSL gateway 20, and the LE FSM receiving the V5.2 PSTN message refers to the FSM state at that time. Performs FSM conversion according to the received V5.2 PSTN message.

The LE FSM then informs the SM that the V5.2 PSTN message was received from the IAD 10 using an internal primitive.

After receiving the internal primitive from the LE FSM, the SM converts the IAD subscriber port information included in the V5.2 PSTN message into the V5.2 subscriber port information necessary for interworking with the LE 30 using the LE protocol. Send an internal primitive defined by the FSM.

Receiving an internal primitive from the SM, the AN FSM changes the FSM and sends a V5.2 PSTN message to the LE 30.

Meanwhile, the V5.2 BCC message transmitted from the LE 30 is received by the AN FSM, and the AN FSM that receives the V5.2 BCC message according to the V5.2 BCC message received by referring to the FSM state at that time. Perform FSM conversion.

The AN FSM then informs the SM that the V5.2 BCC message has been received from the LE 30 using an internal primitive.

After receiving the internal primitive from the AN FSM, the SM converts the bearer channel information included in the V5.2 BCC message received from the LE 30 to the CID (Channel IDentifier) information using the AN protocol, and then converts the information into the LE FSM. Send a defined internal primitive.

Receiving an internal primitive from the SM, the LE FSM changes the FSM and sends a V5.2 BCC message to the IAD 10.

As described above, in the prior art, the VoDSL gateway accommodating CCS-type IAD subscribers according to the specification AF-VMOS-0145.000 should accommodate both the PSTN of the V5.2 standard, the LE side of the BCC protocol, and the AN side protocol. It consists of a complex protocol structure that requires a separate SM for matching between LE FSM and AN FSM.

Therefore, the state mismatch between the PSTN of the V5.2 protocol and the LE FSM and AN FSM of the BCC protocol in the VoDSL gateway is likely to occur. Thus, a problem occurs when managing the V5.2 protocol FSM state between the LE / VoDSL gateway / IAD. There is a problem that the call processing service can not be provided.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and by passing a V5.2 message between LE and IAD through mapping between PSTN subscriber port information and IAD subscriber port information and conversion between bearer channel information and CID information, a VoDSL gateway To provide CCS type IAD subscriber acceptance method in VoDSL gateway that can deliver message between IAD and LE without accepting both LE and AN protocols of PSTN protocol and BCC protocol proposed in V5.2 protocol specification. Its purpose is.

1 is a diagram showing a schematic structure of a conventional VoDSL gateway.

2 illustrates a basic protocol structure of a VoDSL gateway.

3 is a diagram illustrating a message flow between a conventional LE and a VoDSL gateway and a message flow between an IAD and a VoDSL gateway.

4 is a diagram illustrating a schematic structure of a VoDSL gateway to which a CCS type IAD subscriber acceptance method is applied according to the present invention;

5 is a diagram illustrating a process of processing a V5.2 PSTN message according to the present invention;

6 is a diagram illustrating a V5.2 BCC message processing process according to the present invention;

*** Explanation of symbols for the main parts of the drawing ***

100. IAD, 200. VoDSL Gateway,

300.LE

In the VoDSL gateway according to the present invention for achieving the above object, CCS type IAD subscriber acceptance method, V5.2 subscriber between the LE and VoDSL gateway using a PSTN subscriber port mapping table previously negotiated between LE and IAD. Mapping port information and IAD subscriber port information between the VoDSL gateway and the IAD, and then transmitting a V5.2 PSTN message between the LE and the IAD; Instead of bearer channel information included in the V5.2 BCC message received from the LE, CID information is transmitted to the IAD and based on the reference number included in the V5.2 BCC message received from the IAD. And transmitting the received V5.2 BCC message to the LE to transfer the V5.2 BCC message between the LE and the IAD.

Here, in the process of delivering the V5.2 PSTN message, when the V5.2 PSTN message is received from the IAD, an IAD subscriber is included among information elements included in the V5.2 PSTN message by referring to the PSTN subscriber port mapping table. Mapping port information to V5.2 subscriber port information and forwarding the same to the LE; Upon receiving the V5.2 PSTN message from the LE, the V5.2 subscriber port information is mapped to IAD subscriber port information among information elements included in the V5.2 PSTN message with reference to the PSTN subscriber port mapping table. Characterized in that it comprises the step of delivering to the IAD.

When the V5.2 BCC message is delivered, when the V5.2 BCC message is received from the LE, the PSTN subscriber port mapping table is configured with V5.2 subscriber port information included in the V5.2 BCC message. Search for an IAD subscriber port corresponding to the V5.2 subscriber port, find out the CID information corresponding to the found IAD subscriber port, and then include the CID information in the V5.2 BCC message instead of bearer channel information. Delivering the same to the IAD; Upon receiving a V5.2 BCC message from the IAD, the path of the V5.2 BCC message is determined based on a reference number included in the V5.2 BCC message, and the V5 is transmitted to the LE through the determined path. .2 characterized by including the process of delivering the BCC message.

The V5.2 BCC message may include: a message for requesting bearer channel information; A message informing bearer channel information; An error message informing that the AN cannot establish a call due to a subscriber / system error from the AN to the LE; A response message indicating that the error message has been well received from the LE to the AN; It includes a message indicating that an error has occurred in the V5.2 protocol.

Hereinafter, with reference to the accompanying drawings, a method for accommodating an IAD subscriber of a CCS type in a VoDSL gateway according to an embodiment of the present invention will be described in detail.

4 is a diagram illustrating a schematic structure of a VoDSL gateway to which a CCS-type IAD subscriber accommodating method according to the present invention is applied. In order to accommodate the CCS-type IAD subscriber according to the present invention, the IAD 100 has a V5.2 specification. The related standard for processing AN side function to be presented should be accommodated, and VoDSL gateway 200 has a mapping function of PSTN subscriber port information to deliver V5.2 message between IAD 100 and LE 300; It performs a function of converting bearer channel information and CID information.

Table 1 exemplarily shows a PSTN subscriber port mapping table applied to a CCS type IAD subscriber acceptance method according to the present invention.

IAD subscriber port (VPI / VCI / CID) V5.2 subscriber port (V5.2 channel ID) 0 (0/100/16) 25 (10) 0 (0/101/17) 32 (10) : :

5 is a diagram illustrating a process of processing a V5.2 PSTN message according to the present invention.

First, the VoDSL gateway 200 receiving the V5.2 PSTN message (eg, the ESTABLISH message) from the IAD 100 receives the PSTN subscriber port mapping table (pre-negotiated) between the IAD 100 and the LE 300. Referring to Table 1), among the information elements included in the V5.2 PSTN message received from the IAD 100, the IAD subscriber port information (port = 0) is converted to V5.2 subscriber port information (port = 25). After mapping to, it passes to LE 300.

Subsequently, the VoDSL gateway 200 receiving the V5.2 PSTN message (for example, the ESTABLISH ACK message) from the LE 300 performing the operation according to the V5.2 PSTN message received from the VoDSL gateway 200 is the PSTN. Map V5.2 subscriber information (port = 25) to IAD subscriber port information (port = 0) among the information elements included in the V5.2 PSTN message received from the LE 300 by referring to the subscriber port mapping table. To the IAD 100.

As described above, the VoDSL gateway 200 operating according to the present invention includes V5.2 subscriber port information between the LE 300 and the VoDSL gateway 200 and an IAD subscriber port between the VoDSL gateway 200 and the IAD 100. It performs only a function of transferring a V5.2 message between the LE 300 and the IAD 100 by performing a mapping function between the information.

6 is a diagram illustrating a V5.2 BCC message processing process according to the present invention.

First, the VoDSL gateway 200 receiving a V5.2 BCC message (eg, an ALLOCATION message) from the LE 300 receives a bearer channel from among information elements included in the V5.2 BCC message received from the LE 300. After the CID information (CID = 16) is included in place of the information (for example, link = 3 and channel = 10), a V5.2 BCC message is transmitted to the IAD 100.

Here, the VoDSL gateway 200 searches the PSTN subscriber port mapping table with the V5.2 subscriber port information (port = 25) included in the V5.2 BCC message received from the LE 300, and searches the corresponding V5.2 subscriber port. Search for the IAD subscriber port (port = 0) corresponding to the CID information (CID = 16) corresponding to the found IAD subscriber port, and replace the found CID information in the V5.2 BCC message instead of the bearer channel information. Included and delivered to the IAD (100).

As described above, the IAD 100 receiving the V5.2 BCC message from the VoDSL gateway 200 performs a CID allocation / deletion procedure with the corresponding IAD subscriber by using the CID information included in the V5.2 BCC message. The V5.2 BCC message (ALLOCATION ACK message) corresponding to the processing result is transmitted to the VoDSL gateway 200.

The VoDSL gateway 200 receiving the V5.2 BCC message from the IAD 100 receives the V5.2 BCC message transmitted based on the reference number among the information elements included in the V5.2 BCC message received from the IAD 100. Determine the path of the, and delivers the V5.2 BCC message received from the IAD (100) to the LE 300 through the identified path.

Here, when the VoDSL gateway 200 receives the V5.2 BCC message from the LE 300, the VoDSL gateway 200 stores path information such as a reference number and bearer channel information among information elements included in the received V5.2 BCC message. When the corresponding V5.2 BCC message is delivered to the IAD 100, and the response message for the V5.2 BCC message is received from the IAD 100, the reference number included in the response message (the After identifying the path of the corresponding response message (same as reference number), the response message received from the IAD 100 is transmitted to the LE 300 through the identified path.

As described above, when the VoDSL gateway 200 according to the present invention receives a bearer channel allocation / release message from the LE 300, the VoDSL gateway 200 changes the bearer channel information included in the corresponding message into arbitrary CID information to change the IAD (100). ) And the V5.2 BCC message received from the IAD 100 to the LE 300.

On the other hand, as described above, the VoDSL gateway 200 does not accept both the LE and AN protocols of the PSTN protocol and the BCC protocol, and performs only the V5.2 message transfer between the IAD 100 and the LE 300, thereby making a normal call. In order to provide a processing service, messages such as Tables 2 and 3 must be provided between the IAD 100 and the LE 300. Here, Table 2 shows types of V5.2 PSTN messages, and Table 3 shows V5.2 BCC message types.

ESTABLISH Message used to pass information needed for call setup to VoDSL gateway ESTABLISH ACK Response message to an ESTABLISH message SIGNAL Message used to convey hook off, hook on, and hook flash information by the subscriber SIGNAL ACK Response message to a SIGNAL message STATUS Message used when passing status information STATUS ENQUIRY Message used to know the other party's status DISCONNECT Message used when requesting call release DISCONNECT COMPLETE A message indicating that the call has been released PROTOCOL ERROR Messages indicating an error on the V5.2 protocol

ALLOCATION Message used to convey information necessary for bearer channel allocation ALLOCATION COMPLETE Message indicating that bearer channel allocation is complete ALLOCATION REJECT Message indicating that bearer channel allocation could not be made DEALLOCATION Message requesting bearer channel release DEALLOCATION COMPLET Message indicating that bearer channel release is complete DEALLOCATION REJECT Message indicating that bearer channel could not be released AUDIT Bearer Channel Information Request Message AUDIT COMPLETE Bearer Channel Information Send Message AN FAULT Message from AN to LE indicating that call setup could not be made due to a subscriber or system error AN FAULT ACK Reply message to AN FAULT message PROTOCOL ERROR Messages indicating an error on the V5.2 protocol

As shown in Table 2, the V5.2 PSTN message is the same as the message presented in AF-VMOA-0145.000.

However, as shown in Table 3, the V5.2 BCC message is made by additionally accepting the AUDIT, AUDIT COMPLETE, AN FAULT, AN FAULT ACK, and PROTOCOL ERROR messages that are not presented in AF-VMOA-0145.000.

In the VoDSL gateway of the present invention, the method of accommodating the CCS type IAD subscriber is not limited to the above-described embodiment and may be variously modified within the range allowed by the technical idea of the present invention.

According to the CCS-type IAD subscriber acceptance method in the VoDSL gateway of the present invention as described above, the VoDSL gateway does not have to accommodate both the LE and AN protocols of the PSTN protocol and the BCC protocol proposed in the V5.2 protocol specification. By changing the contents of the standard AF-VMOS-0145.000 so that messages between the IAD and the LE can be transmitted, a more stable call processing service can be provided.

Claims (5)

Map the V5.2 subscriber port information between the LE and the VoDSL gateway and the IAD subscriber port information between the VoDSL gateway and the IAD using a PSTN subscriber port mapping table previously negotiated between the LE and the IAD. V5.2 Acceptance of CS-type ID subscribers in VDL gateways carrying PSTN messages. The method of claim 1, wherein the V5.2 PSTN message delivery, When the V5.2 PSTN message is received from the IAD, the IAD subscriber port information is mapped to V5.2 subscriber port information among information elements included in the V5.2 PSTN message with reference to the PSTN subscriber port mapping table. Delivering to the LE; Upon receiving the V5.2 PSTN message from the LE, the V5.2 subscriber port information is mapped to IAD subscriber port information among information elements included in the V5.2 PSTN message with reference to the PSTN subscriber port mapping table. The SS-type ID subscriber receiving method of the VDS Gateway, characterized in that it comprises the step of delivering to the IAD. Instead of bearer channel information included in the V5.2 BCC message received from the LE, the CAD information is transmitted to the IAD and received based on the reference number included in the V5.2 BCC message received from the IAD. The method of accommodating the SSID type of the ID subscriber in the VDL gateway that delivers the V5.2 BCC message to the LE to transfer the V5.2 BCC message between the LE and the IAD. The method of claim 3, wherein the V5.2 BCC message delivery, Upon receiving the V5.2 BCC message from the LE, the PSTN subscriber port mapping table is retrieved using the V5.2 subscriber port information included in the V5.2 BCC message, and the IAD subscriber port corresponding to the V5.2 subscriber port is retrieved. Searching for and finding CID information corresponding to the searched IAD subscriber port, and including the CID information in the V5.2 BCC message instead of bearer channel information and transmitting the CID information to the IAD; Upon receiving a V5.2 BCC message from the IAD, the path of the V5.2 BCC message is determined based on a reference number included in the V5.2 BCC message, and the V5 is transmitted to the LE through the determined path. .2 A method of receiving an SD subscriber of a CS type in a VDL gateway, comprising: delivering a BCC message. The method of claim 3, wherein the V5.2 BCC message, A message requesting bearer channel information; A message informing bearer channel information; An error message informing that the AN cannot establish a call due to a subscriber / system error from the AN to the LE; A response message indicating that the error message has been well received from the LE to the AN; A method of accepting an ID subscriber of a CC type in a VDL gateway, comprising a message indicating that an error has occurred on the V5.2 protocol.