KR20040047357A - Apparatus and Method for IPC functional implementation of ATM switch block in BSC system - Google Patents

Abstract

PURPOSE: A method for implementing an IPC function of an ATM switch block in a base station control system and a method therefor are provided to use TCP/IP and to abstract a lower network, thereby easily realizing IPC between boards and exchanging messages without a lower network layer or a lower protocol. CONSTITUTION: The first board transmits a ping message for checking a keep-alive mode to the second board(S1). If the second board transmits a response by checking whether the corresponding response is received, the first board confirms that the second board is still alive, and if a response message is not received from the second board, the first board repeatedly transmits the ping message for three times(S2-S5). If the second board still does not respond to the ping message even though the ping message is transmitted for three times, the first board closes a connection(S6). The second board transmits a re-connection request(S7).

Description

Apparatus and Method for IPC functional implementation of ATM switch block in BSC system}

The present invention relates to an apparatus and method for implementing a TCP / IP-based IPC function for message transfer between internal boards of an ATM switch block in a 1x base station control station system. Particularly, the present invention relates to a sub-network using TCP / IP, a widely used protocol. By abstracting, it is possible to implement board-to-board IPC (Inter Processor Communication) more easily, and to allow IPC users to exchange messages without implementing lower network layers or lower protocols when exchanging messages with other boards, and further, the TCP / IP The present invention relates to an apparatus and a method for implementing an IPC function of an ATM switch block in a base station control station system to improve stability and ease of implementation / operation / management by using a.

In general, in a 1x base station control station system, the ATM switch block is a global router / local router that is responsible for voice and high-speed data transfer.

In addition, TCP sockets are a very complicated and reliable byte-stream protocol. The TCP protocol has its own flow control and traffic control algorithms, and because it is a widely used protocol, it uses the Transmission Control Protocol / Internet Protocol (TCP / IP) for stability and implementation. It can provide ease of operation / management.

On the other hand, inter-processor IPC (Inter Processor Communication) through the back board in the communication-related equipment is an essential requirement.

Herein, a commonly used IPC structure may include a cell bus (Bus-Bus) method or a dual port RAM (DPRAM). In addition, Ethernet board is added to each board, IP switchable chip is added to a specific board, and then board-to-board communication is performed using TCP / IP.

However, in the case of the above-described cell bus or DPRAM, the implementation of the function or the addition of the IPC node is very difficult compared to TCP / IP.

In the case of cell buses or DPRAM, the implementation of functions or the addition of IPC nodes is more difficult than in TCP / IP.

In addition, in the case of the TCP / IP it is easy to implement and use the function, the reliability of data transmission can be guaranteed due to the retransmission function basically provided by the TCP protocol.

However, even when using TCP / IP, each task has to establish a direct TCP connection, and when it is reconnected, there is a problem in that it is not consistently managed. Also, the troublesome task of exchanging messages (connecting with a specific task of a partner board / Release, sending / receiving messages, and setting up connections) had to be present in each task.

Accordingly, the present invention is proposed to solve the above problems of the prior art,

The purpose of the present invention is to use TCP / IP which is a widely used protocol and abstract the lower network, so that it is possible to easily implement inter-processor IPC (Inter Processor Communication) between boards. Message exchange is possible without the implementation of network layer or sub-protocol. Also, the TCP / IP can be used to improve the stability and ease of implementation / operation / management. A device and a method for implementing the function are provided.

An apparatus for implementing an IPC function according to the present invention for achieving the above object,

An Ethernet chip is mounted on each board to accommodate one IP on each board, and one main board is equipped with an Ethernet hub (HUB) or an Ethernet switch chip and is connected through a back board. Connecting to an Ethernet hub or Ethernet switch on each board is characterized by its device configuration.

In addition, the IPC function implementation method according to the present invention for achieving the above object,

Determining a default setting (Tx / Rx buffer size, Keep Alive check period, receiving port number) to be used for all connections in an Inter Processor Communication Block (IPCB);

After determining the basic configuration, at the IPCB, opening a TCP server to a fixed port for a message to be received by a block in the board;

After opening the port, performing a TCP connection request to servers of all boards to establish all connections for sending messages to each board, and then connecting slot numbers to the established connections;

After the connection, the method comprises the step of maintaining a keep alive function with respect to the connection to maintain the connection with the opponent board, and if the connection is disconnected to perform the reconnection.

1 is a diagram schematically showing a hardware configuration for implementing an IPC function of an ATM switch block according to the present invention;

2 is a diagram illustrating an embodiment for explaining a network configuration of TCP / IP according to the present invention;

3 is a diagram illustrating a software configuration for implementing an IPC function of an ATM switch block according to the present invention;

4 is a diagram illustrating a process of sending a keep alive check message for connection management according to the present invention.

<Explanation of symbols for the main parts of the drawings>

101 ～ 104, 200 ..... Motherboard

110 to 140, 210 ..... Ethernet Chip

220 ..... Ethernet HUB

300 ..... Back Board

Hereinafter, a preferred embodiment of the "IPC function implementation method and ATM switch block of the ATM switch block in the base station control station system" according to the present invention as described above in detail with reference to the accompanying drawings.

First, the present invention is to design and propose a position transparent interprocessor communication (IPC) function based on Transmission Control Protocol / Internet Protocol (TCP / IP) for message transfer between internal boards of an ATM switch block in a 1x base station control station system.

FIG. 1 is a diagram schematically showing a hardware configuration for implementing an IPC function of an ATM switch block according to the present invention, and FIG. 2 is a diagram illustrating an embodiment of a network configuration of TCP / IP according to the present invention.

As shown in the figure, an Ethernet chip 110 to 140 210 is mounted on each board 101 to 104 and 200 to accommodate one IP on each board 101 to 104 and 200. The main board 200 is equipped with an Ethernet hub (HUB) 220 or an Ethernet switch chip, and is connected to the Ethernet hub or Ethernet switch of each board through a back board (300). .

Looking at the configuration of the TCP / IP network through the above configuration as follows.

First, configure the IP address of each board to configure one subnet including slot ID as shown below.

Then, configure the IP address as follows for IP assignment.

AAA.BBB.CCC.DDD

: Network ID: AAA.BBB.CCCSystem ID: DDD (C Class)

After allocating as described above, a random subnet (for example, 192.254.130.xxx) is determined to automatically detect the slot number according to the location of the board in each board using the backboard 300. For example, the slot number is used as the system ID to be automatically assigned at startup.

I.e. 192.254.130.1, 192.254.130.2, 162.254.130.3, ......

If the configuration is made as described above, each board is now bound to one subnet (192.254.130), through which IP communication is possible without an IP router.

3 is a diagram illustrating a software configuration for implementing an IPC function of an ATM switch block according to the present invention.

As shown in the figure, each board 102, 104, after raising the IPCB (Inter Processor Communication Block) 510 (520), which is a block in charge of the IPC in common, blocks to perform the IPC is the IPCB (510) Through 520, messages are exchanged with blocks existing on other boards.

At this time, look at the connection settings between the IPCB of each board as follows.

First, the IPCB determines the default settings to use for all connections. That is, the size of the Tx / Rx buffer, the Keep Alive check period, and the receiving port number are determined.

Next, the IPCB opens a TCP server to a fixed port for a message to be received by a block in the board.

Then, by making a TCP connection request to the servers of all boards to establish all the connections for sending messages to each board, and maintain the 'slot number ↔ connection' table for the set connection.

Finally, keep the Keep Alive function for the connection to keep the connection with the other board, and if the connection is lost, reconnect.

Here, looking at the structure of the IPC message,

DA (Destination Address)-Board number (1 byte) + Block number (1 byte)

Source address (SA)-own board number + block number (2 bytes) to receive response

Message ID (MID)-message distinguishing identifier (2 bytes)

LEN (Message Length-total IPC message size in bytes, including headers (2 bytes)

Invoke ID (IID)-used to distinguish response messages as request message identifiers (2 bytes)

Data ()-actual data (varies according to LEN)

On the other hand, IPC message transmission repeatedly monitors the Message Queue of IPCB, and when a message to be transferred to another board is accumulated in the queue, referring to DA (Destination Address) in the message header, The message will be sent.

Next, when the message arrives on the TCP connection opened by the server, the IPC message is checked and transferred to the message queue corresponding to the block.

In addition, keep alive sends a keep-alive check message to all managed connections and receives a corresponding response to confirm that the other board is alive.

At this time, if there is no response from the other board even after 3 retries, disconnect the connection and request a reconnection.

Looking at the keep-alive message transmission process in the connection management unit with reference to the accompanying drawings as follows.

4 is a diagram illustrating a process of sending a keep alive check message for connection management according to the present invention.

As shown therein, a step (S1) of transmitting a message for checking a keep alive from the first board to the second board (S1), and after the message transmission, checks whether a corresponding response is received and then the first Receiving a response from the second board, confirming that the other board (the second board) is alive, and repeating the message transmission three times (re-transmitting a ping message) if a response message is not received from the second board (S2 to S). S5), and if there is no response from the second board even after the three attempts to retransmit the message, disconnecting (socket closed) the connection (S6), and if the connection is released, requesting reconnection from the second board. Step S7 is made.

In the present invention as described above, when the board number is 0, the multicasting transmission function enables the multicasting and transfer of a message to the corresponding block of all the connected boards, and the board for special purposes such as stopping the function of a specific board. It further includes additional functions such as an IPC blocking function for blocking all incoming / outgoing messages of a message, and a message filtering function for blocking a message received by a board with reference to a header in the case of a specific message.

In the detailed description of the present invention, specific embodiments of an apparatus and method for implementing an IPC function of an ATM switch block in a base station control station system will be described. However, the present invention may be modified in various ways without departing from the scope of the present invention. Do. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

According to the present invention described above, "an apparatus and method for implementing an IPC function of an ATM switch block in a base station control station system", by using TCP / IP, which is a widely used protocol, and abstracting a lower network, the board-to-board IPC ( Inter Processor Communication) can be implemented, and IPC users can exchange messages with other boards without implementing lower network layers or lower protocols.

In addition, stable data transmission is ensured by using TCP / IP, and since the protocol is widely used, development time can be shortened.

In addition, since other software blocks that use IPC are separated from TCP / IP IPC implementations, they can concentrate on providing block-specific services, and when checking IPC-related problems or adding / modifying IPC-related functions, By checking / modifying / changing only the blocks, it is possible to supplement the consistent IPC function.

Claims (6)

An apparatus for implementing an inter processor communication (IPC) function, An Ethernet chip is mounted on each board to accommodate one IP on each board, and one main board is equipped with an Ethernet hub (HUB) or an Ethernet switch chip and is connected through a back board. Device for implementing IPC function of ATM switch block in base station control station system, characterized in that it is connected to Ethernet hub or Ethernet switch of each board. The network configuration of claim 1, wherein Set the IP address of each board to configure one subnet including slot ID as below, and automatically detect the slot number according to the location of the board on each board by using the back board. A device for implementing the IPC function of an ATM switch block in a base station control station system, wherein a random subnet is set so as to be configured, and a slot number is used as a system ID to be automatically assigned at startup of each board. AAA.BBB.CCC.DDD : Network ID: AAA.BBB.CCCSystem ID: DDD (C Class) In the software configuration method for implementing the IPC function, Determining a default setting (Tx / Rx buffer size, Keep Alive check period, receiving port number) to be used for all connections in an Inter Processor Communication Block (IPCB); After determining the basic configuration, at the IPCB, opening a TCP server to a fixed port for a message to be received by a block in the board; After opening the port, performing a TCP connection request to servers of all boards to establish all connections for sending messages to each board, and then connecting slot numbers to the established connections; After the connection, maintaining the keep alive function for the connection to maintain the connection with the other board, and if the connection is disconnected, the ATM switch block in the base station control station system, characterized in that the connection is made. How to implement the IPC function. The method of claim 3, wherein the IPC message transmission, When the message queue of the IPCB is repeatedly monitored, when a message to be transmitted to another board is accumulated in the queue, the message is transmitted to the TCP connection managed according to the board number by referring to DA (Destination Address) of the message header. A method of implementing an IPC function of an ATM switch block in a base station control station system. 4. The method of claim 3, wherein receiving an IPC message is When the message arrives through the TCP connection opened as the server, the IPC function of the ATM switch block is implemented in the base station control station system, which checks the block number of the DA of the corresponding message header and delivers the message to the message queue corresponding to the block. Way. The method of claim 3, wherein the connection management (Keep Alive), Periodically sending a keep alive check message for all managed connections; After the check message is transmitted, receiving a corresponding response to confirm that the other board is alive, and if there is no response from the other board even after three retries, then disconnecting the connection and requesting reconnection. A method of implementing an IPC function of an ATM switch block in a base station control station system.