KR20020056178A - Message exchange method among wireless communication line card for private branch exchange - Google Patents

Abstract

PURPOSE: A message exchanging method between cordless telecommunication line cards of a PBX(private branch exchange) is provided to reduce a load according to an extended subscriber in case of extending subscribers and be easily adopted to a large capacity PBX in the future by mounting several cordless telecommunication line cards in a PBX. CONSTITUTION: There are more than three line cards in one block and each line card can be connected to a maximum 8 base stations(8 cells), and thus, three blocks can manage total 72 cells(24 cell x 3). The blocks are classified into a master block(100) and slave blocks(200,300), and line cards(100a-300c) inside each block are classified into a master card and slave cards. The master card(100a) of the master block(100) provides a synchronization to every line card of each block(100-300) and handles a message connection between slave cards(100b,100c) of the block(100) to which itself belongs and master cards(200a,300a) of slave blocks(200,300). Though the master cards(200a,300a) of each slave block(200,300) is provided with the synchronization from the master card(100a) of the master block(100), they handle a message connection with slave cards(200b,200c,300b,300c) of the blocks(200,300) to which each slave block(200,300) belongs.

Description

MESSAGE EXCHANGE METHOD AMONG WIRELESS COMMUNICATION LINE CARD FOR PRIVATE BRANCH EXCHANGE}

The present invention relates to a method of exchanging messages between wireless call line cards of a private exchange, and in particular, when a plurality of line cards are mounted in a small capacity private exchange (PBX) to extend the wireless subscriber, the load by the increased subscriber can be reduced. The present invention relates to a method for exchanging messages between wireless call line cards of a private exchange.

In general, in order to apply a CT-3 series European Enhanced Cordless Telecommunication (DECT) in a private switching center (PBX), a wireless calling line card for connecting each wireless base station may be installed in the switching center. Must be mounted on

That is, the wireless call line card (Line Card) and each base station is connected by wire, so that a call can be made with a wireless subscriber. The currently developed wireless call line card can be mounted on only one sheet, so that the connection can be made. Since the number of possible base stations is limited, there are many difficulties in applying to a large-capacity private exchange (PBX) that requires a lot of wireless subscribers.

Therefore, various methods for mounting two or more wireless calling line cards have been studied, and one of them is a control card called a common control fixed part (CCFP) as shown in FIG. (CCFP) allows the exchange of messages between different wireless calling line cards (10-30).

Here, the description of the specific configuration inside each of the line cards 10 to 30 will be omitted since it may obscure the gist of the present invention.

On the other hand, one wireless call line card can be used by connecting up to eight base stations (in the embodiment of FIG. 1, 6 base stations are connected to each line card), and each base station can accommodate 12 subscribers. The line card is designed to accommodate up to 96 subscribers.

At this time, 96 subscribers in one wireless calling line card use the same sync, so there is no problem in mutual message exchange. However, when using multiple line cards, different subscribers can use different synchronization and communication protocols. Due to the same problems, it was difficult to exchange messages between subscribers in different circuit cards. The control card (CCFP) enabled the exchange of messages between subscribers in different circuit cards.

That is, when the control card (CCFP) sends a master clock (Master Sync Clock) to each circuit card, each circuit card uses the master clock in synchronization to enable message exchange between subscribers in the other line card. .

At this time, the control card (CCFP) is not used only for the generation of the master clock, so that messages can be exchanged using a communication protocol of the control card (CCFP) when exchanging messages between subscribers in other line cards. It is.

In other words, when a message is exchanged between subscribers in all circuit cards, the control card (CCFP) analyzes all the information and delivers the necessary messages and information to the circuit card.

As described above, the control card (CCFP) of the conventional private switching system (CCFP) allows a smooth message exchange between subscribers between each line card even if a plurality of wireless call line cards are mounted in the system. Since the communication protocol is made via a control card (CCFP), there is a problem that the more subscribers, the greater the load.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and when a plurality of circuit cards are mounted in a private branch exchange (PBX) to expand the wireless subscriber, it is possible to reduce the load caused by the increased subscriber. It is an object of the present invention to provide a method for exchanging messages between wireless calling line cards of a private exchange.

1 is an exemplary view showing a configuration for mounting a plurality of wireless call line card using a control card (CCFP) in a conventional private exchange.

Figure 2 is an exemplary view shown to explain the concept of the message exchange method of the present invention.

FIG. 3 is an exemplary view illustrating a message exchange method when the wireless communication line card is mounted by expanding the concept of FIG. 2. FIG.

The present invention for achieving the above object comprises the steps of: dividing a plurality of wireless communication line cards in a private switching system, each block card into a plurality of blocks each one predetermined block; Setting any one block as a master block in each of the divided blocks and setting the remaining blocks as slave blocks; When the subscriber of each slave block makes a call with a subscriber of another block, message exchange is performed through the master block.

In addition, the present invention having the features as described above comprises the steps of setting any one line card as a master card in the line card constituting each block, and the other line card as a slave card; When a subscriber of a slave card included in each block makes a call with a subscriber of another circuit card in the block, message exchange is performed through the master card of the block.

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

First, the circuit card of the present invention is configured to communicate by a communication protocol (SCC: Serial Communication Control) provided in the CPU of the circuit card itself, unlike the prior art, a system of several circuit cards (PBX) ), It is configured to receive various data such as clock and subscriber number information from a central processing module (CPM) of the system (PBX) through a parallel bus (PB).

That is, the present invention relates to a message exchange method for mounting a plurality of circuit cards configured as described above in a private branch exchange system (PBX), and to a message exchange method that can reduce the load even if the number of subscribers increases.

In other words, by conventionally managing message exchange between all line cards mounted in the system by the control card (CCFP), when there are a large number of subscribers, there are more messages to be processed accordingly, which causes a lot of load on the control card (CCFP). The problem of delayed and delayed processing can be solved by the message exchange method of the present invention.

Next, the specific method will be described with reference to FIGS. 2 and 3.

First, Figure 2 is an exemplary view for explaining the concept of the message exchange method of the present invention, as shown in this case, when a plurality of circuit cards are mounted in the system, any one of which is set as a master (Master) The remaining line cards are set as slaves.

Accordingly, the transmitting end Tx of the master is connected to the receiving end Rx of the slave, the transmitting end Tx of the slave is connected to the receiving end Rx of the master, and two outputs of the slave transmitting end Tx are mastered. Since it is connected to Rx of receiver, it should be connected using buffer.

At this time, the line card is configured such that the master and the slave are not fixed but can be changed in software.

Hereinafter, in order for each subscriber of the circuit card configured as described above to communicate with the subscriber of the other circuit card, the call is made through the master.

That is, when the call is performed from the master MC to the slave SL1 or SL2, the transmitting end Tx of the master MC and the receiving end Rx of the slave SL1 or SL2 are immediately connected to make a call. If the slave SL1 makes a call with another slave SL2, the two slaves are not directly connected, but are connected via the master MC.

In other words, the information output from the transmitting end Tx of the slave SL1 is connected to the receiving end Rx of the master MC, and the master MC transmits the information to another slave SL2 and receives the received information. It transfers the response of the slave SL2 back to the slave SL1 to perform the exchange role.

Thus, in the configuration of FIG. 2, the case where three line cards are mounted is exemplified. However, even when more than nine line cards are mounted as shown in FIG. 3, the same method as in the case of FIG. By exchanging messages.

That is, three or more line cards described in FIG. 2 are set as one basic block, and the blocks are extended to three so that up to nine line cards can be mounted.

Accordingly, one block has three line cards, and each line card can be connected with up to eight base stations (8 cells), so that a total of 72 cells (24 cells × 3) can be managed in three blocks. do.

For reference, the CPI of each line card (68302CPU) has three SCC (HDLC) channels, among which SCC2 is used among the line cards in each block, SCC1 is used between each block, and the other SCC3 is used for other purposes. (E.g., SIO (Serial Input Output)).

Next, the block configured as described above is largely divided into the master block 100 and the slave blocks 200 and 300, and the circuit cards 100a to 300c inside each block are further divided into a master card and a slave card.

Accordingly, the master card 100a of the master block 100 provides synchronization to all the line cards of each of the blocks 100 to 300, and the slave cards 100b and 100c of the block 100 in which they are included. And the message connection between the master cards 200a and 300a of the other slave blocks 200 and 300.

Next, the master cards 200a and 300a of each slave block 200 and 300 are provided with synchronization from the master card 100a of the master block 100, but the slave cards of the blocks 200 and 300 to which they belong, respectively. It is responsible for message connection with (200b, 200c, 300b, 300c).

Next, all slave cards are controlled by the master card of the block or master block to which they belong.

At this time, each of the master block and the slave block is not fixed, it is possible to change the setting in software, and the master card and the slave card is also configured to change the setting.

As described above, the method of exchanging messages between wireless call line cards of the private exchange of the present invention can reduce the load caused by the increased subscribers when the wireless subscriber is expanded by mounting a plurality of wireless communication line cards on the private exchange. There is an effect that can be easily applied to a large-capacity private exchange.

Claims (3)

When a plurality of wireless communication line cards are mounted in a private switching system, dividing a predetermined number of each line card into a plurality of blocks in one block; Setting any one block as a master block in each of the divided blocks and setting the remaining blocks as slave blocks; And when a subscriber of each slave block makes a call with a subscriber of another block, message exchange is performed through a master block. 2. The method of claim 1, further comprising: setting any one circuit card as a master card and setting the other circuit card as a slave card in the circuit cards constituting each block; When a subscriber of a slave card included in each block makes a call with a subscriber of another circuit card in the block, the wireless call circuit card of the private switch is configured to perform message exchange through the master card of the block. How messages are exchanged between them. 3. The block or line card set as the master or slave according to claim 1 or 2, wherein the setting state is not fixed, and the setting can be changed by software. How to exchange messages.