KR20120035391A

KR20120035391A - Communication system for making a sigtran ip server process network in all ip environment and controlling method therefor

Info

Publication number: KR20120035391A
Application number: KR1020100096881A
Authority: KR
Inventors: 최성춘
Original assignee: 주식회사 인스프리트
Priority date: 2010-10-05
Filing date: 2010-10-05
Publication date: 2012-04-16

Abstract

The present invention is directly connected to a neighboring station AS in an ALL IP environment by referring to an interworking table containing network information, routing transmission information through a currently connected path, and providing status information of neighboring devices. A power AS for transmitting to adjacent power equipment according to the conditions set in the interworking table; It connects directly with neighboring AS in other ALL IP environment connected with the AS as direct-to-point method to route transmission information through the currently connected path by referring to the interworking table containing network information. Provides a control method of a communication system constituting a Sigtran IPSP network in an ALL IP environment including a non-adjacent station AS that transmits state information of connected neighboring station equipments to neighboring station equipment according to conditions set in the interworking table.
According to the present invention having the configuration described above, each communication device is directly connected to the IPSP network without a signaling gateway in an ALL IP environment, and the connection state is written into specific items in the communication table, and then the specific items are checked to operate the network. Therefore, even if each communication equipment does not have a signaling gateway that plays a central control role, it is possible to smoothly perform communication by checking specific item information in the currently connected communication table, thereby maximizing the efficiency of network operation.

Description

Communication system for making a SIGTRAN IP Server Process Network in ALL IP environment and controlling method therefor}

The present invention relates to a communication system constituting a Sigtran IPSP network in an ALL IP environment and a control method thereof. In particular, in an ALL IP environment, each communication device is directly connected to an IPSP network without a signaling gateway, and the connection state thereof is stored in a communication table. SIGRAN is a communication system and a control method for constructing an IPSP network in an ALL IP environment in which a specific item is entered and then the network is checked and entered.

In general, in order to process voice signals in communication equipment, a public switched telephone network (PSTN) network connects signals through an E1 line, and a home location registrator of a mobile communication system. The following equipment, such as HLR, performs signaling using MAP (Mobile Application Part) based on SS7, which is a common channel signaling method.

However, the communication network as described above agrees to convert the bearer of the base network to the IP base as the development of the voice data based switching network accelerates the development of the packet switching network for packet delivery, and the mobile communication after the third generation. Networks tend to be unified into transport networks based on IP. In recent years, packet-switching-based services have already been provided as a form of development of the circuit-switching-based mobile communication network, and developments for the ALL IP network are showing rapid progress.

In this situation, the deployment of the newly installed ALL IP network will exist in the form of being absorbed, coexisted, or accommodated based on the existence of the existing mobile communication network. Therefore, to meet this set of requirements, the IEGT's SIGTRAN signaling transport working group (IETF) is a transport protocol suitable for accommodating existing SS7 signaling in IP networks. We propose SCTP (Stream Control Transmission Protocol) that complements this, and propose SIGTRAN composed of adaptation layers for integration with existing SS7 protocol layers or application protocols. The above IETF proposal has already been released as a commercial product and is integrated with existing SS7 protocol stacks by module, and applications using the existing signaling scheme are applied to the IP network without any special modification procedure by using these functions. .

Then, referring to Figure 1 of the conventional communication network management system applying the SIGTRAN method as described above, first, the PSTN network 70 for processing the voice data transmitted from the subscriber terminal of the wired telephone using the SS7 protocol;

An IP network 72 for processing IP signals of ASs (Application Server) 71A-Ns transmitted to the PSTN network 70;

Signaling for converting a signal transmitted from the PSTN network 70 to an IP network signal to be transmitted to the IP network 72, while converting an IP type signal transmitted from the IP network 72 to the PSTN network 70 It is configured to include a signaling gateway (hereinafter referred to as SG: 73).

In addition, the PSTN network 70 and the SG 73 are interworked with each other by a message transfer protocol (MTP), and the SG 73 and the IP network 72 are connected by a signal transfer protocol. Interworking using the Stream Control Transmission Protocol (SCTP), the Network Management Layer (M3UA: MTP3-User Adaptation Layer) and the Physical Connection Layer (IP).

Here, the IP / SCTP / M3UA layer is referred to as SIGTRAN. In addition, the SG 73 is connected to an application server (AS) that performs an application server process (ASP), for example, an HLR, an EIR, an AAA server, and the like.

On the other hand, the operation of the conventional communication network management system applying the SIGTRAN method as described above, first, when transmitting a signal from the PSTN network 70 to the IP network 72, the PSTN network 70 transmits the signal through the MTP SG (73) To send). Then, the SG 73 converts the transmission signal of the PSTN network 70 into a signal in the form of IP, such as the AS 71A-N of the IP network 72 that is currently connected to the IP network 72. And SIGTRAN, that is, through a path connected to the IP / SCTP / M3UA layer. Accordingly, the corresponding AS 71A-N of the IP network 72 sends the transmission signal of the PSTN network 70, which has been transmitted, to the corresponding destination by looking at the contents of the interworking table. On the other hand, when any one of the AS 71A-N of the IP network 72 transmits data to the PSTN network 70, the corresponding AS 71A-N refers to the interworking table to the current SG. It transmits to the SG 73 through the path connected to the 73, that is, the path connected to the IP / SCTP / M3UA layer. In this case, the SG 73 processes data with the AS 71A-Ns in consideration of the state of the IP network 72. If the SG 73 is normal, the SG 73 receives the data of the received AS 71A-N from the PSTN network. 70) is converted into data of the PSTN network 70 through the MTP path currently connected to the PSTN network 70 to execute the normal communication.

However, the conventional communication network management system employing the SIGTRAN method as described above is a method of processing transmission signals by the ASs or PSTN network equipments of the IP network via the SG. Bottlenecks can occur, leading to problems such as reduced transmission efficiency or very high probability of failure.

That is, the conventional communication network management system applying the SIGTRAN method as described above must register with the SG when new equipment is added to the network, and simultaneously add all new network information to the related existing equipment. The configuration was very difficult, and there was a problem that the SIGTRAN network configuration and operation method through IPSP in the next generation ALL IP environment could not be applied at all.

Therefore, the present invention has been invented to solve the above problems, and even after each communication device does not have a signaling gateway that plays a centralized control role, it checks the specific item information in the currently connected communication table to determine the operation state of other devices. Its purpose is to provide a communication system and control method for constructing a Sigtran IPSP network in an ALL IP environment where communication is free from bottlenecks or failures caused by centralized network management because it transmits and receives signals. have.

Yet another object of the present invention is that communication devices are connected in a one-to-point manner, so even when newly connecting or replacing communication devices, only the corresponding devices need to be easily operated without affecting the entire equipment. Therefore, the present invention provides a communication system and a control method for configuring a Sigtran IPSP network in an ALL IP environment which is very easy to configure a dynamic network.

The present invention for achieving the above object is connected to the neighboring AS in direct IP environment in a direct one-to-point (Point-to-Point) way to refer to the interworking table containing the network information transmitted information through the currently connected path A power station AS for routing and transmitting state information of neighboring devices to neighboring power equipment according to a condition set in an interworking table;

It connects directly with neighboring AS in other ALL IP environment connected with the AS as direct-to-point method to route transmission information through the currently connected path by referring to the interworking table containing network information. Provides a communication system constituting a Sigtran IPSP network in an ALL IP environment including a non-neighboring station AS that transmits the status information of connected neighboring equipments to neighboring equipment according to the conditions set in the interworking table.

Another feature of the present invention is an all-IP environment IPSP network connection process in which the ASs under the ALL IP environment execute SCTP association connection and M3UA interworking with neighboring superpowers connected directly to one-to-point with them;

A CONCERN item registration request process for requesting to register the state information of a specific non-neighboring station AS to a CONCERN item of an interworking table from one AS to a neighboring AS connected to the AS during the ALL IP environment IPSP network connection process;

After the CONCERN item registration request process, the neighboring AS that is requested to register the status information of the specific non-neighboring station AS in the CONCERN item grasps the status of the specific non-neighboring station AS, and then the status information of the specific non-neighboring station AS obtained is obtained. A status information notification process of notifying the neighboring AS to which the information is requested;

After the status information notification process, the neighboring AS requesting the status information of the specific non-neighboring station AS receives the status information of the specific non-neighboring station AS that it wants to know from its neighboring AS. Accordingly, the present invention provides a control method of a communication system constituting a Sigtran IPSP network in an ALL IP environment including a fast information processing process for processing a transmission signal.

In the present invention as described above, each communication equipment is directly connected to the IPSP network without a signaling gateway in the ALL IP environment, and the connection state is written in specific items in the communication table, and then the specific items are checked to operate the network. Even if there is no signaling gateway that the communication equipment plays the centralized control role, it checks the specific item information in the currently connected communication table to check the operation status of other equipments and then sends and receives signals so that the bottleneck caused by the centralized network management by the signaling gateway Since the communication can be performed smoothly from the trouble situation, there is an effect of maximizing the efficiency of network operation.

In addition, according to the present invention as described above, since each communication equipment is connected in a one-to-point (Point-to-Point) method, even when newly connecting or replacing the communication equipment, only the corresponding equipment without affecting the entire equipment simply Since it is easy to construct a dynamic network because it is easy to operate, it also greatly expands the convenience of constructing an ALL IP environment.

1 is an explanatory diagram for explaining an example of a conventional communication network management system applying the SIGTRAN method.
2 is an explanatory diagram illustrating a communication system constituting a Sigtran IPSP network in an ALL IP environment according to the present invention;
Figure 3 (a) is the SCTP interworking table of the system of Figure 2,
(b) an M3UA interworking table of the system of FIG. 2,
4 is a flowchart of the present invention.

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

An embodiment of the communication system according to the present invention is directly connected to a neighboring station AS in an ALL IP environment in a direct-to-point manner, as shown in FIG. 2, with reference to an interworking table containing network information. Power AS (1B) for routing the transmission information through the connected path and for transmitting the status information of the adjacent equipment to the neighboring equipment (1A, 1C) according to the conditions set in the interworking table;

The information is transmitted through the currently connected path by referring to the interworking table containing the network information by connecting directly with the neighboring AS (1C) under another ALL IP environment connected with the AS (1B) in a direct point-to-point manner. It is configured to include a non-adjacent station AS (1D) for routing and transmitting the state information of the neighboring station equipment (1C) directly connected to it to the neighboring station equipment according to the conditions set in the interworking table.

Here, the description of the neighboring AS and the non-adjacent AS AS described only four directly connected in a one-to-point (Point-to-Point) method in this embodiment, this is one used for convenience to explain the present invention system It is merely an embodiment of the system, the system according to the present invention includes connecting all the plurality of ASs, such as two or more in the ALL IP environment.

In addition, SCTP association is used between the neighboring ASs, and this SCTP is an area in charge of connection and transmission, and is uniquely distinguished by 1) logical connection between SCTP endpoints and 2) transmission address (IP / Port). ) Multi-homing function through multiple paths using multiple IP addresses. In addition, the M3UA connection procedure should also be performed between the neighboring ASs, which are 1) a communication network management protocol and 2) have a logic concept of performing specific functions such as AS, for example, HLR, EIR, and AAA. 3) It is composed of ASP (Application Server Process) among actual ASs to perform operations, 4) It can be composed of multiple ASPs for redundancy in one AS, 5) One DPC (Destination Point Code per AS) ) To operate uniquely in the network.

Here, the interworking table includes SCTP and M3UA, wherein the dual SCTP interworking table is configured as shown in (a) of FIG. 3, and the M3UA interworking table is configured as shown in (b) of FIG. 3.

That is, in the SCTP interworking table, 1) ASSOC ID is a SCTP association identifier item, 2) LOCAL IP / PORT is its IP address and PORT information to be connected, and 3) REMOTE IP / PORT is a server to connect to, namely ASP. IP address and port information.

In the M3UA interworking table, 1) DPC (Destination Point Code) is the only station signal point to be used in the network, that is, address information of the AS, and 2) ASSOC ID refers to an SCTP association connection connected to the corresponding station. If there is an ID value, it means a neighboring station that is directly connected. If there is no ASSOC ID value, it means that it is connected through another DPC (must have ROUTE information), and 3) ROUTE is a non-adjacent station that is not directly connected. Information about neighboring stations for transmitting data, for example, this value means that data can be transmitted through AS (1C) in case of AS (1D), and 4) STATUS is the state of the corresponding DPC. This value is managed by ACTIVE / INACTIVE / DOWN / CONGESTION. 5) CONCERN is an item that records the DPC information of neighboring stations that should be informed when the status of the DPC changes.

Next, the control method of the present invention having the above configuration will be described.

In the method according to the present invention, as shown in FIG. 4, in the initial state S1, ASs under an ALL IP environment are directly connected to their neighboring stations connected to themselves in a point-to-point manner, and SC3 association connection and M3UA interworking are performed. All IP environment IPSP network connection process (S2) to execute sequentially;

During the ALL IP environment IPSP network connection process (S2), a CONCERN item registration request process (S3) requesting to register the state information of a specific non-neighboring AS to the CONCERN item of an interworking table from one AS to a neighboring AS that is connected to the AS. and;

After the CONCERN item registration request process (S3), the neighboring AS that is requested to register the state information of the specific non-neighboring station AS in the CONCERN item identifies the state of the specific non-neighboring station AS and then identifies the state of the specific non-neighboring station AS. A status information notification process (S4) for notifying the information to the neighboring AS that requested the information;

After the status information notification process (S4), the neighboring AS requesting the status information of the specific non-neighboring station AS receives the status information of the specific non-neighboring station AS that it wants to know from its neighboring AS. According to the result, it comprises an information rapid processing process (S5) for processing the transmission signal.

Here, the SCTP association connection during the ALL IP environment IPSP network connection process (S2) is an INIT for transmitting an INIT signal including IP address information (including one or more IP addresses) of the first ASP server to another second ASP server. Signal transmission step,

An INIT-ACK signal transmitting step of transmitting an INIT-ACK signal including its IP address information (including one or more IP addresses) from the second ASP server of the power station to the first ASP server of the power station after the INIT signal transmitting step; ,

A COOKIE-ECHO signal transmitting step of transmitting, to the second ASP server, a COOKIE-ECHO signal finishing the connection setup after the INIT ACK signal transmitting step;

After the COOKIE-ECHO signal transmission step, the association connection step of finishing the SCTP association connection in response to the COOKIE-ECHO signal by transmitting the COOKIE-ACK to the second ASP server, which has received the COOKIE-ECHO signal, from the second ASP server. It includes.

In addition, the state information of a specific non-adjacent station AS during the state information notification process (S4) is classified into AS DOWN (DOWN state), AS INACTIVE (state that can only be transmitted) and AS ACTIVE (actual data transfer state). It is composed.

In other words, the present invention as described above, first, in the ALL IP environment, each AS is directly connected to the IPSP network without a signaling gateway, and the connection state is written in specific items in the SCTP interworking table and the M3UA interworking table, and then the specific item. Check and operate the network.

For example, assuming that the ASs are four as shown in FIG. 2, the AS 1A is connected to the neighboring AS 1B, and the AS 1B is connected to another neighboring AS 1C. The AS 1C is connected to another AS 1D, which is its own power, to form an IPSP network, and after the transmission signal is transmitted from the AS 1A to a non-adjacent station AS 1D, the AS 1C. It is assumed that a failure (DOWN) occurs.

At this time, each of the AS (1A-D) sequentially executes the M3UA interworking and SCTP association connection with the neighboring power station directly connected to itself (Point-to-Point).

Here, the CONCERN item of the interworking table provides status information of a specific non-adjacent station AS (1C) to the neighboring AS (1B) connected to it while transmitting transmission data from the AS (1A) during the connection process of the ALL IP environment IPSP network. Ask to register with. Then, the neighboring station AS 1B, which has been requested to register the state information of the specific non-adjacent station AS 1C to the CONCERN item, has requested the AS (referred to by the neighboring station 1A to the CONCERN item in its M3UA interworking table). After entering 1C), the transmission signal is transmitted to the non-adjacent station AS (1D), which is the transmission destination, through the neighboring station AS (1C) with reference to specific items in the SCTP interworking table and the M3UA interworking table.

At this time, each of the AS (1A-1D), after grasping the status information of the AS (1A-1D) of the neighboring power station connected to it, AS DOWN (DOWN state), AS INACTIVE (state message only state transmission state in the M3UA interworking table) ) And AS ACTIVE (actual data transfer status). Then, each of the ASs (1A-1D) is to determine the status information of the neighboring and non-adjacent stations transmitted from the AS (1A-1D) of the neighboring station connected to it and transmits the status information of the specific non-neighboring station AS. Check that the requesting item is registered in the CONCERN item of the interlocking table.

For example, in the case of the AS 1B, a request for transmitting the state information of a specific non-adjacent AS 1C by its neighboring neighbor AS 1A is described in the CONCERN item of the interworking table. AS (1B) is its neighbor, but AS (1A), it informs AS (1A), the neighboring party that requested that information, that AS1C, a particular non-adjacent station, is currently in the DOWN state. do.

Then, the AS 1A analyzes the status information of the specific non-adjacent station AS 1C that it wants to know from its neighboring station AS 1B, and then suspends the transmission signal according to the result. Or identify the bypass route and take appropriate action.

Therefore, in case of applying the method of the present invention as described above, even if each communication equipment does not have SG that plays a centralized control role, it checks specific item information in the currently connected communication table to check the operation status of other devices, and then sends and receives signals. It is free from bottlenecks and failures caused by centralized network management by SG, and it can perform communication smoothly. Even when connecting or replacing new communication equipment, only the equipment is easily operated without affecting the whole equipment. It is also very easy to construct a dynamic network.

1A: Adjacent Power 1B: Adjacent Power
1C: Non Adjacent Station 1D: Non Adjacent Station

Claims

It connects directly with neighboring AS in direct IP environment in point-to-point manner, routes transmission information through the currently connected path by referring to interworking table containing network information, and transmits status information of neighboring devices to interworking table. A power station AS for transmitting to adjacent power equipment according to a set condition;
It connects directly with neighboring AS in other ALL IP environment connected with the AS as direct-to-point method to route transmission information through the currently connected path by referring to the interworking table containing network information. A communication system that configures a Sigtran IPSP network in an ALL IP environment including a non-adjacent station AS that transmits state information of connected neighboring equipments to neighboring equipment according to the conditions set in the interworking table.

The communication system of claim 1, wherein an SCTP association connection and an M3UA connection are performed between the large AS and the neighboring AS.

The interworking table of claim 1, wherein the interworking table includes a connection between SCTP and M3UA, and the dual SCTP interworking table includes items of ASSOC ID, LOCAL IP / PORT, and REMOTE IP / PORT.
The M3UA interworking table is a communication system for configuring a Sigtran IPSP network in an ALL IP environment, characterized in that it comprises the items of DPC (Destination Point Code), ASSOC ID, ROUTE, STATUS, CONCERN.

All IP environment IPSP network connection process in which the ASs under the ALL IP environment execute SCTP association connection and M3UA interworking with neighboring power stations connected directly to them in a one-to-point manner;
A CONCERN item registration request process for requesting to register the state information of a specific non-neighboring station AS to a CONCERN item of an interworking table from one AS to a neighboring AS connected to the AS during the ALL IP environment IPSP network connection process;
After the CONCERN item registration request process, the neighboring AS that is requested to register the status information of the specific non-neighboring station AS in the CONCERN item grasps the status of the specific non-neighboring station AS, and then the status information of the specific non-neighboring station AS obtained is obtained. A status information notification process of notifying the neighboring AS to which the information is requested;
After the status information notification process, the neighboring AS requesting the status information of the specific non-neighboring station AS receives the status information of the specific non-neighboring station AS that it wants to know from its neighboring AS. A control method of a communication system constituting a Sigtran IPSP network in an ALL IP environment including a fast information processing process for processing a transmission signal according to the present invention.

5. The method of claim 4, wherein the status information of the specific non-adjacent station AS during the status information notification process includes AS DOWN (DOWN status), AS INACTIVE (status capable of transmitting status messages), and AS ACTIVE (actual data transfer enabled status). Control method of a communication system for configuring a Sigtran IPSP network in the ALL IP environment, characterized in that it further comprises the step of configuring separately.