KR19990003249A - Wireless Channel Information Management Method in Wireless Switching System - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

Wireless switching system

I. The technical problem that the invention is trying to solve

The radio switching system manages radio channel information between adjacent cells.

All. Summary of the Solution of the Invention

If there is a mismatch between the radio channel information of the base station occupied during the call and the radio channel information of the radio exchange, each base number has a unique number of the radio terminal and is used as information for scanning the radio channel through the channel information recovery.

la. Important uses of the invention

In the wireless switching system, it is possible to improve the success rate of the call service of the wireless terminal.

Description

Wireless Channel Information Management Method in Wireless Switching System

The present invention relates to a method for managing radio channel information in a radio switching system, and more particularly, to a method for recovering channel information with a unique number of a radio terminal every call in a fixed base station.

In general, the wireless switching system is to install a fixed base station in units of cells (cell), it is configured to make an incoming and outgoing call using a wireless terminal within a certain distance range from the fixed base station.

The fixed base station is connected to the wireless exchange to transmit and receive data required for the call processing service. In addition, the fixed base station performs a link establishment function by scanning an idle channel capable of link establishment in response to a link establishment request of a wireless terminal. That is, when the fixed base station requests a link setting from the wireless terminal, the fixed base station scans all channels, for example, all channels from channel 1 to channel 40, and generates a specific sync pattern in a channel used by the fixed base station. ), It forms a call link through that channel.

The wireless terminal consists of a manufacturer identification code and a terminal identification code and has a unique number consisting of a total of 27 bits. When a wireless terminal requires a service by occupying a wireless channel, the wireless terminal notifies the wireless exchange of a unique number. The wireless exchange searches whether the unique number of the wireless terminal that is identical to the unique number of the informed wireless terminal is already used. The radio exchange retrieves the information to recover the radio channel information, and the fixed base station updates the channel information being used and scans the radio channel for the calling service of another radio terminal.

In the conventional radio switching system, when the same radio channel frequency is used between adjacent cells, there is a problem in that data transmitted and received is damaged to degrade call quality. In addition, in the conventional radio switching system, the radio channel information is shared between adjacent cells. Due to the radio characteristics, the link is reset or the radio link state is unstable in a call, and thus the radio channel information is changed between the radio terminal and the base station. As described above, when the radio channel information between the radio terminal and the base station is changed, there is a case where the channel information held by the radio exchange and the base station is different from each other. Therefore, when the radio channel information being used between the radio switch and the base station is different from each other, the success rate for the call service in the radio terminal is lowered. In addition, there is a problem that the success rate of handover between adjacent cells in the radio switching system is significantly lowered.

Accordingly, an object of the present invention is to provide a method for managing radio channel information for improving the efficiency of a call service in a radio switching system.

Another object of the present invention is to provide a method for recovering channel information using a unique number of a wireless terminal in a wireless switching system.

It is still another object of the present invention to provide a method for sharing radio channel information in use in order to minimize the influence between neighbor cells in a radio switching system.

According to the present invention for achieving the above object, when a wireless terminal occupies a wireless channel in a wireless switching system and requests a service, the wireless terminal searches for a unique number of the wireless terminal in the exchange and searches whether the same unique number is in use. The channel information may be updated. In addition, when the wireless channel information is updated in the wireless switching system, the present invention is characterized by scanning the wireless channel for the call service of another wireless terminal.

1 is a block diagram of a wireless switching system to which the present invention is applied.

2 is a diagram illustrating a radio channel information management process according to an embodiment of the present invention.

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

1 is a block diagram of a wireless switching system to which the present invention is applied, and includes a wireless switch 100, a fixed base station 110, 120, and a wireless terminal 130.

Referring to Figure 1 will be described the operation of the wireless switching system according to an embodiment of the present invention. The wireless switch 100 receives the unique number of the wireless terminal 130 from the fixed base station 110, 120, and searches whether it is a registered number. The fixed base stations 110 and 120 receive a call setup request message from the wireless terminal 130 and search for a channel. The fixed base stations 110 and 120 form a communication path with the wireless terminal 130 within a predetermined radius of the radio cells C1 and C2, respectively.

2 is a diagram illustrating a process of managing radio channel information in a radio switching system according to an embodiment of the present invention, and releases previous channel information when a new channel is occupied.

A method of managing radio channel information in a radio switching system according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. When the wireless terminal 130 requests call setup in step 210, the fixed base station 110 in the wireless cell C1 where the wireless terminal 130 is currently located scans a wireless channel and transmits data to the wireless terminal 130 through a specific channel, thereby transmitting the data to the fixed base station 110 and the wireless. Occupancy of wireless channel between terminals 130 is achieved. In step 220, the fixed base station 110 receives the unique number data from the wireless terminal 130 through the occupied wireless channel, and notifies the wireless switch 100 of the unique number. In step 230, the wireless switch 100 searches the unique number received from the fixed base station 110 to determine whether it is a registered terminal, and in case of an unregistered terminal, stops the service and instructs the fixed base station 110 to terminate the call.

On the other hand, if the wireless terminal 130 is a registered terminal, the wireless switch 100 in step 240 detects whether the same unique number is already in use. If the same unique number is in use, the wireless switch 100 releases the call information for the driver in step 250. Meanwhile, if the same unique number as the unique number is not in use, the process proceeds to step 280 and supplies the dial tone to the wireless terminal 130.

In step 260, the wireless switch 100 controls the fixed base station 110, 120 to release the channel information for use between the adjacent cells C1, C2. In operation 270, the wireless switch 100 controls the fixed base stations 110 and 120 to share new channel information of the neighbor cells C1 and C2. In operation 280, the wireless switch 100 supplies a dial tone to the wireless terminal 130 through the fixed base station 110 and processes a general call.

As described above, the present invention can be used as a base station in the radio switching system to receive the channel information from the radio exchange from time to time to scan the channel. In addition, if the channel information of the base station and the exchange period does not coincide with reference to the channel information being used in the radio switching system, the base station does not scan a channel that does not match, thereby improving the service quality of the radio section. In addition, the present invention has the advantage of improving the handover success rate since the base station references the channel information being used when the base station attempts to find a new channel in the radio switching system.

Claims (3)

A wireless channel management method in a wireless switching system including at least one fixed base station which forms a communication path through a wireless channel with a wireless terminal in a cell of a predetermined distance radius under the control of the wireless exchanger and the wireless exchanger, Determining whether a terminal having the unique number is registered by being notified of the unique number of the wireless terminal occupying a predetermined wireless channel; Releasing the call for the article by searching whether there is a call being used with the same unique number as the wireless terminal, And releasing the channel information used for the communication between adjacent cells and sharing new use channel information between the adjacent cells. Claims [1] A method for managing radio channel information in a radio switching system comprising a radio exchange controlling a call processing of a base station and a plurality of fixed base stations controlled by the radio exchange. If the radio channel information occupied by the fixed base station and the radio channel information of the radio exchange are not matched, A method for managing radio channel information in a radio switching system, characterized in that for each call, the unique number of the radio terminal is used as information for scanning a radio channel. The method of claim 2, If the unique number of the wireless terminal is registered, search whether the same unique number as the unique number is in use, If a unique number identical to the unique number is used for the article, release the call being used with the same unique number as the unique number, In the radio switching system for managing radio channel information in the radio switching system characterized in that the radio channel of the base station processing the call of the radio terminal and the release channel information of the adjacent cell is released, and the new use channel information is shared between the adjacent cells. Way.