KR20040037676A - Call setting method for wireless network of subscriber system - Google Patents

Abstract

PURPOSE: A call setup method for a WLL(Wireless Local Loop) system is provided to confirm whether an inputted origination message is a valid number and assign a channel. CONSTITUTION: A WLL system checks a hook state of a phone. If the phone is in the off-hook state, the WLL system transmits an origination message which corresponds from the first digit to the last digit corresponding to a termination number to a BSC(Base Station Controller). The BSC analyzes a number included in the origination message, confirms whether the analyzed number is a valid number, and assigns a traffic channel. An LE(Local Exchange) connected with the BSC connects a call according to the termination number.

Description

Call setting method of wireless subscriber network system {CALL SETTING METHOD FOR WIRELESS NETWORK OF SUBSCRIBER SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless subscriber network system, and more particularly, to a call setup method of a wireless subscriber network system for shortening a call setup time of a wireless local loop (WLL) system in a code division multiple access (CDMA) wireless network.

In general, a wireless local loop (WLL) system is used to wirelessly provide a subscriber line provided between a subscriber and a telephone station, and such a system provides a voice communication service and a simulation transmission ( Fax service and data communication service can be provided if necessary.

The WLL system combines radio frequency (RF) technology developed in the 1970s with semiconductor and wireless communication technologies developed in the late 1980s to solve problems such as frequency efficiency, wireless channel quality, and cost per subscriber. It began to be developed.

The advantages of the WLL system are that construction costs, time, and maintenance costs are reduced compared to conventional wired networks, and new services can be secured early or subscriber networks can be provided by providing various services such as excellent call quality, data, and ISDN. It can be very usefully applied as communication infrastructure of developing countries with poor structure.

In this case, a WLL terminal or a WLL box of a WLL system is used to receive a service using the WLL system, and the WLL terminal and the WLL box are operated by the same WLL system.

In the call setup method of the wireless subscriber network system, conventional WLL originating terminal (Phone) generates an outgoing message immediately upon off-hook in order to solve the time delay between connection between subscribers and completion of call setup. The base station controller (BSC) solves the inconvenience of the subscriber additionally pressing the SEND button by allocating a call channel and transmitting the called number in an overlapping transmission method.

1 is a flowchart illustrating a call setup method of a conventional wireless subscriber network system, the method comprising: checking a hook state of a phone as shown in the drawing; Detecting an input of a first digit of a called number when the terminal is off-hook; Allocating a call channel between the mobile phone and the base station controller BSC by transmitting an outgoing message to a base station controller BSC when an input of the first digit of the called number is detected; Storing a called number, which is input before allocating the call channel, in the terminal; Transmitting a called number stored in the terminal and a called number inputted after a call channel is allocated to the base station controller (BSC); The step of connecting the call according to the called number at the switching center (LE) connected to the base station controller (BSC).

The transmission operation of the conventional WLL system starts with a base station controller (BSC) using an access channel as soon as the terminal (telephone) becomes off-hook. Send to the controller and attempt to obtain a traffic channel.

The outgoing message does not include the digit of the called number entered by the calling party. The base station controller (BSC) receives a call message output by the phone off hook state and allocates a call channel.

That is, the channel is automatically assigned by the terminal Phone sending an outgoing message to the base station controller BSC simultaneously with the off hook.

Subsequently, when a call channel is allocated, the phone transmits the called number stored in the memory as a burst double tone multi-frequency message to the base station controller (BSC), and also bursts the called number input after setting the call channel. As a double tone multi-frequency (DTMF) message, it is transmitted in real time one by one to the base station controller (BSC) at the same time.

The base station controller BSC transmits the called number to the switching center LE, which connects the call with the called subscriber according to the called number.

Then, the base station controller (BSC) recognizes the call connection of the switching center, and the switching center (LE) generates a ring back tone to the calling terminal (Phone) to notify the call connection with the called party subscriber is established Is complete.

However, in the conventional call setup method of the wireless subscriber network system, the call channel is connected while the user picks up the receiver and inputs the other party's number through the overlapping transmission method, which wastes resources of the system. There was a problem of using a communication channel.

Accordingly, the present invention has been made to solve the above problems, and after verifying that the originating message (origination message) input through the process of valid number verification to the existing code division multiple access method (CDMA) system is a valid number By allocating, it is possible to solve the problem of excessive use and occupancy of the call channel in the overlapped transmission method, and to provide a method for establishing a call in a wireless subscriber network system that enables the use of the overlapped transmission system easily.

1 is a flowchart illustrating a call setup method of a conventional wireless subscriber network system.

2 is a flowchart illustrating a call setup method of a wireless subscriber network system of the present invention.

The present invention for achieving the above object, the step of checking the hook state of the terminal; Transmitting an outgoing message corresponding to a called number from a first digit to a last digit to a base station controller when the terminal is in an off hook state; Analyzing a number included in the outgoing message and assigning a call channel after confirming that the number is valid; And connecting a call according to the called number at an exchange station connected to the base station controller.

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

2 is a flowchart illustrating a call setup method of a wireless subscriber network system of the present invention, the method comprising: checking a hook state of a phone as shown in the drawing; Transmitting an origination message corresponding to a called number from a first digit to a last digit to a base station controller (BSC) when the terminal is off-hook; Analyzing a number included in the origination message and assigning a call channel after confirming that the number is valid; In the switching station connected to the base station controller (BSC) consisting of connecting the call according to the called number, it will be described the operation of the present invention configured as described above.

First, when the phone connected to the WLL system is off-hook, the WLL system outputs a dial tone, and after the user hears the dial tone, the digit a message corresponding to the first called number input to the terminal is WLL. And transmits an origination message corresponding to the transmitted digit 'a' to a base station controller (BSC) of the CDMA system.

The above process is performed by the number of called party numbers to receive a call channel.

That is, when the caller presses the telephone number key of the phone corresponding to the called party's phone number, the WLL system receives the corresponding digits 'a' to 'i' and receives the digits 'a' to 'i'. Transmits an origination message corresponding to 'to a base station controller (BSC) to check whether it is a valid number.

Accordingly, when the BSC receives the last outgoing message, the BSC analyzes the number included in the received outgoing message and allocates a valid number plane call channel so that the caller and the called party can receive the call. Make it possible.

As described in detail above, the present invention solves the problem in the overlapping transmission scheme by allocating a channel after confirming that an originating message inputted through a valid number identification process is a valid number in a conventional CDMA system. It can solve the problem of excessive use and occupancy of the communication channel, and there is an effect that can easily use the overlapping transmission system.

Claims (1)

Checking a hook state of a terminal (Phone); If the terminal is off-hook, transmitting an outgoing message corresponding to a first digit to a last digit corresponding to a called number to a base station controller; Analyzing a number included in the outgoing message and assigning a call channel after confirming that the number is valid; And establishing a call according to the called number at an exchange station connected to the base station controller.