KR100366540B1 - Access switching system with distributed no.7 signalling function and initialization and restoration method of sshp in ass-t - Google Patents

Abstract

The present invention relates to an ASS (Access Switching Subsystem) in which No. 7 signal message processing functions in a switch of a mobile communication system are distributed, an initialization method of SSHP in an ASS-T, and a failure recovery method. ASS-T distributed the processing function limited to ASS-7 to improve the scalability according to the capacity expansion, ASS distributed method, SSHP initialization method in ASS-T, and failure recovery It is about a method.

Description

ACT.7 SIGNALLING FUNCTION AND INITIALIZATION AND RESTORATION METHOD OF SSHP IN ASS-T}

The present invention relates to an ASS distributed with No.7 signal message processing, an initialization method of SSHP in ASS-T, and a failure recovery method, and that the No.7 message processing function has been limited to ASS-7. It is related to the initialization method of ASS and SSHP in ASS-T and failure recovery method in which the No.7 signal message processing function which improves scalability according to capacity expansion by distributing by -T is distributed.

No.7 signal message processing is an internationally standardized common line signaling system that distinguishes the passage of data and the passage of signals used for data transmission, and delivers the signal message using a common signal path. Each distinguishes itself and its counterpart from the unique identifiers of the internationalized format, called signal points. The use of the No. 7 signal message processing scheme in a communication network is, for example, applied at an exchange.

Fig. 1 is a flow chart of No. 7 messages between station signal points in a conventional exchange system. In order for the exchange of the mobile communication system to perform mobile call processing, as shown in Fig. 1, it is necessary to perform signal message transfer between the own station and the call processing block of the large station. Therefore, the message that the call processing block of the own station wants to deliver to the large station is delivered to the large station through the signal message processor SSHP (Signalling System Handling Processor) 11 and the lower device ST (Signalling Terminal) 15, and in the large station, the ST is reversed. And it is delivered to the user terminal of the large power through SSHP. In the conventional No.7 signaling message processor, the SSHP receives a signaling message from a higher No.7 user (eg, ISUP (ISDN User Part) or TCAP (Transaction Capability Application Part) 10) to transmit the message. In order to transmit a message to another signal point, the signal is transmitted to ST 15 'which is hardware connected to another signal point.

Looking at the overall structure of the exchange in the mobile communication system, the exchange basically consists of three subsystems: an access switching subsystem (ASS), an interconnection network subsystem (INS), and a central control subsystem (CCS). It is located at the center and connects ASS to each other or between ASS and CCS. CCS performs overall operation and maintenance of the system. ASS performs subscriber and trunk line matching, distributed call processing functions, ASS-S (analog subscriber matching module) for supplying general wired subscribers and various signals, trunk line matching module (ASS-T) for trunk matching with other networks, ASS-M (Mobile Subscriber Matching Module) for accessing mobile station control stations, ASS-7 (No.7 Signal Link Matching Module) with No.7 signaling for signaling between exchanges and a wide range of data services, voice / fax mail system It consists of ASS-V / F (VMS / FMS matching module) for matching with.

2 is a schematic diagram of a No. 7 signal message processor in a conventional exchange system. Referring to FIG. 2, the No.7 signal message processor implemented in a single rack in the ASS-7 is a signaling data link between two signal points and a Signaling System Handling Processor Group (SSHG) 22 that performs a real time message processing function of an exchange. It consists of a Signaling Terminal Group (STG) 23, which reliably delivers a signaling message, and a Signaling Terminal Network (STN) (not shown) that provides a communication channel between the ST and SSHG. That is, the SSHG 22 is divided into a minimum message processing function unit, and up to 16 SSHGs 22 are applied to one exchange. The hardware structure of each SSHG-STG will be described in more detail with reference to FIG. 3. In the SSHG 22, two signaling system handling processors (SSDPs) 32 and 32 'operate as a load sharing structure, and up to 16 signals are used. Links ST0 to ST15 33 have been allocated. As the number of mobile network subscribers increases and the number of systems to be interworked increases, the required No.7 signal link capacity of the mobile switching center must be increased accordingly. However, the above-mentioned No.7 signal message processor in the existing exchange is limited to one matching rack. It was designed to extend beyond 128 links.

One object of the present invention is to overcome the above-mentioned problems of the prior art, and the No.7 signal message processing that maximizes flexibility and scalability by adopting an open structure for easy expansion according to capacity expansion and easy access to various networks. It is to provide a distributed ASS.

Another object of the present invention is to provide an exchanger of a mobile communication system that can reduce cost and efficiently manage a network because the number 7 signal link can be elastically increased or decreased as the capacity of the system increases.

It is still another object of the present invention to provide a method for initializing and recovering network management data in an ASS having a structure capable of elastically increasing or decreasing signal link No. 7 as the capacity of the system increases.

That is, one aspect of the present invention for achieving the above object is

ASS-S for supplying various signals, ASS-T for trunk matching with other networks, ASS-M for accessing mobile subscriber station control stations, ASS-7 for No.7 signaling, matching with voice / fax mail systems In an ASS (Access Switching System) in a mobile communication system switch configured with ASS-V / F for ASS-T,

Two signaling system handling groups (SSGs) that perform real-time message handling;

A signaling terminal group (STG) connected to each of the SSHGs and transmitting a signaling message through a signaling data link between two signaling points; And

ASS (Access Switching System) distributed with the No.7 signal message processing function, characterized in that it comprises a local SSHP management unit connected to the SSHG and the SMP (Signalling Main Processor) of the exchange responsible for the initialization and recovery of network management data to be.

A second aspect of the present invention for achieving the above object is two Signaling System Handling Group (SSHG) ASS-T performs a real-time message processing function; A signaling terminal group (STG) connected to each of the SSHGs and transmitting a signaling message through a signaling data link between two signaling points; And ASS (Access Switching System) comprising a local SSHP management unit connected to No.7 management unit in the SMP (Signalling Main Processor) of the SSHG and the exchange is responsible for the initialization and recovery of network management data;

CCS (Central Control Subsystem) which is in charge of the overall operation and maintenance of the exchange system.The No.7 management unit in the signaling main processor (SMP) is connected to the local SSHP management unit of ASS-T to initialize and restore network management data. CCS supporting; And

A switch of a mobile communication system including an INS (Interconnection Network Subsystem) that connects ASS to each other or between ASS and CCS.

A third aspect of the present invention for achieving the above object is a first step (S1) of the No.7 management unit on the SMP side to broadcast to the ASS-T that the SMP has been initialized;

A second step (S2) of collecting the state of the SSHP mounted in the ASS-T to which the local SSHP manager of the ASS-T belongs after receiving the initialization signal;

A third step (S3) in which the local SSHP management unit operates for a certain time to collect the statuses of the SSHPs responding to the call and notify the No. 7 management unit of this information;

A fourth step (S4) in which the management unit No. 7 generates its own management map table with the status of the SSHP sent by the local SSHP management unit (S4);

A fifth step S5 in which the management unit No. 7 requests each ASS-T to initialize its own SSHP;

A sixth step (S6) of receiving, by the local SSHP management unit receiving the SSHP initialization request of the rack to which the rack belongs, the initialization message necessary for routing the No. 7 message to the lower SSHP;

A seventh step (S7) in which the local SSHP manager cleans up the final map of the SSHP that has responded to the initialization request and reports it to the No.7 manager of the SMP;

An eighth step (S8) in which the management unit No.7 receives the final SSHP Map table from each local SSHP management unit for a predetermined time, and then completes the initial initialization to create the final SSHP Map table; And

No.7 management section of the network management data in the ASS-T including the ninth step (S9) for delivering the final Map table to each of the NO.7 users and other N0.7 user management unit to perform their respective functions. Initialization method.

A fourth aspect of the present invention for achieving the above object is the 101 step (S101), if the failure of the SSHP is detected by the local SSHP management unit of the ASS-T, the local SSHP management unit immediately delivers it to the No.7 management unit (S101);

Step 102 (S102) of receiving a failure message of the SSHP, a new SSHP Map table excluding the failed SSHP from the management unit No. 7 immediately;

Step 103 (S103), which the No. 7 management unit transmits to the No. 7 user and other No. 7 management units to perform their respective functions;

Step 104 where the local SSHP management unit initiates monitoring of the status of the SSHP;

Step 105, when the local SSHP manager detects the failure of the SSHP, immediately forwards it to the No.7 manager (S105);

Step 106 (S106) in which the No. 7 management unit, which has received the termination of the specific SSHP, recovers the lower SSHP data; And

After the SSHP recovery is completed, the No. 7 management unit generates a new SSHP Map table and transfers data to each No. 7 user and other No. 7 management units (S107). This is a method for failover of SSHP in T.

1 is a flow chart of No. 7 messages between station signal points in a conventional exchange system;

2 is a schematic diagram of a No. 7 signal message processor in a conventional exchange system;

FIG. 3 is a hardware structure diagram of the SSHG-STG in the No. 7 signal message processor in the conventional in-exchange system shown in FIG.

4 is a schematic diagram of an ASS-T for processing No. 7 signal messages in an ASS according to a preferred embodiment of the present invention;

5 is a flowchart of a method for initializing network management data in an ASS-T according to a preferred embodiment of the present invention; and

6 is a flowchart of a failure recovery method of SSHP in ASS-T according to a preferred embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

40: Signaling Main Processor (SMP) 41: No.7 management

42: Access Switching Subsystem-T (ASS-T) 43: Local SSHP Manager

44: Signaling System Handling Processor Group (SSG)

46: Signaling System Handling Processor

45: Signaling Terminal Group (STG)

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

According to the present invention, two SSHGs having 16 signal links are distributed to each ASS-T, so that up to 960 No. 7 signal links can be expanded as the number of ASS-Ts increases, thereby supporting such a change. In order to ensure accurate understanding of the status of SSHPs distributed to the trunk, the two blocks, S7INM (Signalling No. 7 Inter Nerwork Management) on the SMP side and S7DIR (Signalling No. 7 Data Initialization Restoration) on the ASS-T side, It checks the status of the SSHP 46 in real time by interlocking and characterized by a method of recovering it in case of failure.

4 is a schematic diagram of an ASS-T for processing No. 7 signal messages in an ASS according to a preferred embodiment of the present invention. Access Switching System (ASS) in which No. 7 signal message processing function is distributed includes a Signaling System Handling Group (SSHG) 44, a Signaling Terminal Group (STG) 45, and a local SSHP manager 43. It is configured by.

As shown in FIG. 4, each relay line matching module (ASS-T) 42 has two SSHGs 44 distributed therein and has 32 No. 7 signal links for each ASS-T 42. The local SSHP manager 43 of each ASS-T 42 is loaded and executed in the ASS-T. In the ASS of the present invention having such a configuration, when the capacity expansion of the No. 7 link is required, the No. 7 signal link can be sufficiently flexibly extended by adding the ASS-T 42.

Specifically, in the ASS of the present invention, the SSHG (Signalling System Handling Group) 44 performs a real-time message processing function. In the ASS of the present invention, the SSHG 44 includes two SSHPs 46, which receive a No. 7 signal message from a No. 7 user in order to provide redundancy and deliver the message to another signal point to which the message should be delivered. It is configured to. A signaling terminal group (STG) 45 is connected to the SSHP 46 and serves to transmit a signaling message between two signaling points through a signaling data link, and the local SSHP manager 43 is connected to the SSHP 46 and the SSHP 46. It is connected to No.7 management part of SMP (Signalling Main Processor) of exchange and is responsible for initializing and restoring internal data of SSHP 46. The local SSHP manager 43 is equivalent to S7DIR (Signalling No. 7 Data Initialization Restoration) and corresponds to a software block that performs internal data recovery and initialization of the SSHP 46. As shown in FIG. 4, when the No.7 message processing function is distributed to the ASS-T 42 in the exchange of the mobile communication system, the ASS-T 42 is a signaling main in the Central Control Subsystem (CCS). In conjunction with the No. 7 management unit 41 of the processor, it is in charge of the No. 7 signaling function dedicated to the conventional ASS-7. The No. 7 management unit 41 of the SMP corresponds to S7INM (Signalling No. 7 Inter Nerwork Management) and corresponds to a software block for managing the state of the internal network of No. 7.

In the ASS of the present invention as described above, since the SSHP 46 is not installed in one same rack but installed in a distributed system, the state of each ASS-T 42 may change from time to time and the entire management function is loaded. The state of the SMP can change from moment to moment. Therefore, knowing the exact status of SSHP 46 without being affected by time and circumstances has a significant impact on NO.7 message delivery.

Another aspect of the present invention is a method for initializing and failing back internal data of SSHP 46 mounted in ASS-T 42. 5 is a flowchart of a method for initializing network management data in an ASS-T according to a preferred embodiment of the present invention. Referring to the process of managing the state of the SSHP 46 in conjunction with the two distributed management unit 41 and 43 with reference to Figure 5, first SMP (Signalling Main Porcessor) and exchange in the CCS management unit on the SMP side The management unit 41 broadcasts to the ASS-T 42 that the SMP has been initialized (S1). After receiving this initialization signal, the local SSHP manager 43 on the ASS-T 42 side collects the status of the SSHP 46 mounted on the ASS-T 42 to which it belongs (S2). In addition, the local SSHP manager 43 operates for a predetermined time, collects the statuses of the SSHP 46 in response to its call, and informs the No. 7 manager 41 of this information (S3). At this time, the No. 7 management unit 41 collects the state of the SSHP 46 for each ASS-T 42 from each local SSHP management unit 43 for a predetermined time, and then the local SSHP management unit 43 Creates its own management map table with the status of the sent SSHP 46 (S4). Subsequently, the No. 7 management unit requests each ASS-T 42 to initialize its own SSHP 46 (S5). Local SSHP management unit 43 receives the initialization request of the SSHP 46 of the rack to which it belongs (S6) to the lower SSHP (46) for routing the No.7 message routing. Subsequently, the local SSHP management unit 43 organizes the final map of the SSHP 46 in response to the initialization request and reports it to the No. 7 management unit 41 of the SMP (S7). No. 7 management unit 41 receives the final SSHP 46 Map table from each local SSHP management unit 43 for a predetermined time, and after a predetermined time elapses, No. 7 management unit 41 completes the entire initialization. The final SSHP 46 Map table is created (S8). The final Map table is transferred to each of the NO.7 users and other N0.7 user management units to perform their respective functions (S9). This completes the initialization, so that each No. 7 user and other No. 7 user managers can know the list of SSHPs 46 that can be used to perform their functions.

6 is a flowchart of a failure recovery method of SSHP in ASS-T according to a preferred embodiment of the present invention. If the SSHP 46 causes a failure, a process of quickly processing the user message to prevent loss of the user message and recovering the failure of the SSHP 46 will be described with reference to FIG. 6. If the failure of the SSHP 46 is detected by the local SSHP manager 43 of the ASS-T 42, the local SSHP manager 43 immediately transfers it to the No. 7 manager 41 (S101). Receiving the failure message of the SSHP 46, the No. 7 management unit 41 generates a new SSHP 46 Map table excluding the failed SSHP 46 without delay (S102), and then generates each No. 7 user and It is transmitted to the other No.7 management unit to perform their respective functions (S103). Subsequently, the local SSHP manager 43 starts monitoring the status of the SSHP 46 (S104), and the No. 7 manager 41 waits in a state capable of receiving a new SSHP 46 failure and recovery. When the local SSHP manager 43 detects the failure of the SSHP 46, the local SSHP manager 43 immediately transmits it to the No. 7 manager 41 (S105). No. 7 management unit 41 received the failure cancellation of the specific SSHP 46 recovers the lower SSHP data (S106). After the recovery of the SSHP 46 is completed, the No. 7 management unit 41 creates a new SSHP 46 Map table, and transfers the data to each No. 7 user and other No. 7 management units 41 to perform their respective functions. To perform (S107). As a result, the state management function of the SSHP 46 distributed to the ASS-T 42 may be stably performed.

According to the present invention, the ASS (Access Switching Subsystem) distributed with the No.7 signal message processing function in the switch of the mobile communication system, the initialization method of the SSHP in the ASS-T, and the failure recovery method have increased capacity in the switch of the mobile communication system. According to the present invention, the No.7 signal link can be flexibly increased or decreased, thereby reducing the cost and effectively managing the network, and the present invention further distributes the No.7 function to each trunk. Therefore, it is possible to provide an effect of improving the stability of the network by simplifying the switch structure.

Claims (8)

ASS-S for supplying various signals, ASS-T for trunk matching with other networks, ASS-M for accessing mobile subscriber station control stations, ASS-7 for No.7 signaling, matching with voice / fax mail systems In an ASS (Access Switching System) in a mobile communication system switch configured with ASS-V / F for ASS-T, Two signaling system handling groups (SSGs) that perform real-time message handling; A signaling terminal group (STG) connected to each of the SSHGs and transmitting a signaling message through a signaling data link between two signaling points; And ASS distributed with the No.7 signal message processing function, which is connected to the No.7 management unit in the SMP (Signalling Main Processor) of the SSHG and the exchanger, and includes a local SSHP manager in charge of initialization and recovery of network management data. (Access Switching System). The method of claim 1, The No.7 signal message processing function is distributed, characterized in that the SSHG includes two SSHPs that receive the No.7 signal message from the user No.7 above and deliver it to another signal point to which the message should be delivered. ASS. 2. The distributed ASS of claim 1, wherein the local SSHP management unit is S7DIR (Signalling No. 7 Data Initialization and Restoration). Two signaling system handling groups (SSGs), in which ASS-T performs real-time message processing functions; A signaling terminal group (STG) connected to each of the SSHGs and transmitting a signaling message through a signaling data link between two signaling points; And ASS (Access Switching System) comprising a local SSHP management unit connected to No.7 management unit in the SMP (Signalling Main Processor) of the SSHG and the exchange is responsible for the initialization and recovery of network management data; CCS (Central Control Subsystem) which is in charge of the overall operation and maintenance of the exchange system.The No.7 management unit in the signaling main processor (SMP) is connected to the local SSHP management unit of ASS-T to initialize and restore network management data. CCS supporting; And Switch in a mobile communication system including an INS (Interconnection Network Subsystem) that interconnects ASSs or between ASSs and CCSs. The method of claim 4, wherein And two SSHPs, wherein the SSHG receives the No. 7 signal message from the user No. 7 above and delivers the SSHP to another signal point to which the message should be delivered. 5. The exchange of claim 4, wherein the local SSHP management unit is Signaling No. 7 Data Initialization Restoration (S7DIR), and the No. 7 management unit of the SMP is Signaling No. 7 Inter Nerwork Management (S7INM). A first step S1 in which the No. 7 management unit on the SMP side broadcasts to the ASS-T 42 that the SMP has been initialized; A second step (S2) of collecting the state of the SSHP mounted in the ASS-T to which the local SSHP manager of the ASS-T belongs after receiving the initialization signal; A third step (S3) in which the local SSHP management unit operates for a certain time to collect the statuses of the SSHPs responding to the call and notify the No. 7 management unit of this information; A fourth step (S4) in which the management unit No. 7 generates its own management map table with the status of the SSHP sent by the local SSHP management unit (S4); A fifth step S5 in which the management unit No. 7 requests each ASS-T to initialize its own SSHP; A sixth step (S6) of receiving, by the local SSHP management unit receiving the SSHP initialization request of the rack to which the rack belongs, the initialization message necessary for routing the No. 7 message to the lower SSHP; A seventh step (S7) in which the local SSHP manager cleans up the final map of the SSHP that has responded to the initialization request and reports it to the No.7 manager of the SMP; An eighth step (S8) in which the management unit No.7 receives the final SSHP Map table from each local SSHP management unit for a predetermined time, and then completes the initial initialization to create the final SSHP Map table; Internal data of SSHP in ASS-T including a ninth step (S9) in which the No.7 management unit delivers the final Map table to each of the NO.7 users and other N0.7 user management units to perform their respective functions. Initialization method. Step 101, when the failure of the SSHP is detected by the local SSHP manager of the ASS-T, the local SSHP manager immediately transmits it to the No.7 manager (S101); Step 102 (S102) of receiving a failure message of the SSHP, a new SSHP Map table excluding the failed SSHP from the management unit No. 7 immediately; Step 103 (S103), which the No. 7 management unit transmits to the No. 7 user and other No. 7 management units to perform their respective functions; Step 104 where the local SSHP management unit initiates monitoring of the status of the SSHP; Step 105, when the local SSHP manager detects the failure of the SSHP, immediately forwards it to the No.7 manager (S105); Step 106 (S106) in which the No. 7 management unit, which has received the termination of the specific SSHP, recovers the lower SSHP data; And After the SSHP recovery is completed, the No. 7 management unit generates a new SSHP Map table and transfers data to each No. 7 user and other No. 7 management units (S107). How to fail back SSHP.