KR100248087B1 - Incoming Method Using Base Station Information and Status Message in 2nd Generation Wireless Telephone System - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an incoming method in a CT-2 system.

2. The technical problem to be solved by the invention

According to the present invention, a base station performs location tracking and an incoming call procedure simultaneously to efficiently use a radio channel, and designates a channel to which an incoming call is to be made. To provide an incoming method in the CT-2 system by reducing the incoming time by switching.

3. Summary of Solution to Invention

The present invention includes a first step of creating a list of terminals to be received and tracked according to an incoming request and a location tracking request and polling the terminal; Determining a type of polling response message received from the terminal; A third step of switching to a designated channel to perform an incoming call procedure when a polling response message is received from a called terminal; And when the polling response message is received from the location tracking terminal, storing the location of the responding location tracking terminal and polling the remaining location tracking terminal.

4. Important uses of the invention

The present invention is used in a wireless telephone system and the like.

Description

Incoming Method Using Base Station Information and Status Message in 2nd Generation Wireless Telephone System

The present invention is an incoming call indicator in a CIS message by mixing polling and base station information and status (CIS: CFP (CT-2 Fixed Part) Information and Status) messages in a cordless telephone 2 generation (CT-2) system. It relates to an incoming method using the (ICI: Incoming Call Indication) bit.

Conventionally, when a base station receives an incoming request for a terminal station from an exchange or a control station, the base station performs location tracking for the terminal station by transmitting polling to the terminal station that is requested to be received, and receives a polling response from the terminal station. Then, the base station selects a new channel and performs the incoming procedure for the terminal station.

However, the terminal station sends a polling response message to the base station for polling, scans all channels, and waits for an incoming message to be received from the base station again. At this time, there is a problem that the terminal station takes a long time to search all the channels in order to receive the incoming message.

In order to solve the problems described above, the present invention, by using the location tracking and the incoming call procedure for the terminal station at the base station in efficient use of the radio channel, by specifying the channel to be the incoming procedure in the terminal station It is an object of the present invention to provide an incoming method using base station information and status messages in a second generation wireless telephone (CT-2) system that reduces incoming time by immediately switching to an incoming channel without searching all channels.

1 is a network diagram showing an example of a second generation wireless telephone (CT-2) system to which the present invention is applied.

Figure 2 is an embodiment message flow diagram illustrating a method of receiving between a terminal station and a base station according to the present invention.

3 is a flowchart illustrating an embodiment of a base station in a method of receiving according to the present invention;

4 is a flowchart illustrating an embodiment of a terminal station in the incoming method according to the present invention.

* Explanation of symbols for the main parts of the drawings

11 terminal station 12 base station

13: control station 14: exchange station

15: database

The present invention for achieving the above object, in the incoming call method using the base station information and the status message in the second generation wireless telephone (CT-2) system, a list of the terminal to be called and tracked according to the call request and location tracking request A first step of creating and polling the terminal; A second step of confirming whether the polling response message received from the terminal is received from the called terminal or the location tracking terminal; A third step of switching to a designated channel to perform an incoming call procedure when a polling response message is received from the called terminal; And when the polling response message is received from the location tracking terminal, storing the location of the responding location tracking terminal and polling the remaining location tracking terminal.

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

1 is a network diagram showing an example of a second generation wireless telephone (CT-2) system to which the present invention is applied.

The CT-2 system includes a CT-2 terminal station 11, a plurality of base stations 12 that manage a cell and communicate with the terminal station 11 over the air, and a control station 13 that controls the plurality of base stations 12. And a database 15 for storing information related to the subscriber such as the location of the terminal station 11 and the exchange station 14 having an incoming function.

In practice, the control station 13, the exchange station 14, and the database 15 may be integrated into one physical entity or may be implemented as independent entities.

Figure 2 is a flow diagram of an embodiment of a message overall showing a method of receiving between a terminal station and a base station according to the present invention.

When the base station 12 receives the incoming request for the terminating terminal station a from the switching station 14 or the control station 13 and the location request for the positioning terminal stations b to d at the same time, the base station 12 selects an idle channel. The location registration and poll link identifier (LR_POLL_LID) and CIS message are repeatedly transmitted to each terminal station (a to d) (201 to 208).

Each terminal station (a to d) may transmit a polling response (ID_OK) message including a terminal ID (PID: Portable IDentifier) to each of the base station 12 when it is within the reachable cell radius (a to d).

Polling message for the called terminal (a) that needs to be called The ICI bit indicated in the following CIS message is set to 1, and the channel number to be called is designated as 1 and transmitted to the called terminal (a) ( 202).

On the other hand, the ICI bit included in the CIS message following the polling message of the location tracking terminal stations b to d which performs only location tracking is set to 0 and transmitted to the location tracking terminal stations b to d (204, 206 and 208).

The terminating terminal station (a) receives a polling message and a CIS message for itself, switches to the designated channel 1 if the ICI bit is 1, waits for an incoming call procedure from the base station 12, and if the ICI bit is 0, the polling response ( ID_OK) message is sent to the base station 12 and all channels are scanned.

When the base station 12 receives the polling response (ID_OK) message from the terminating terminal station (a), the base station 12 switches to channel 1 to perform the incoming call procedure, and the polling response (ID_OK) message from the location tracking terminal stations (b to d). Receiving stores the location for the location tracking terminal stations (b to d).

3 is a flowchart illustrating an embodiment of a base station in a method of receiving according to the present invention.

First, the base station 12 determines whether there is an incoming request and a location tracking request from the switching station 14 or the control station 13 to the terminal station 11 (301).

If there is an incoming request and a location tracking request, a list of terminal stations 11 is created according to the request (302), and the polling message and base station information and status (CIS) message for each terminal station 11 are repeatedly transmitted. (303). At this time, if there is no incoming call request and location tracking request, it enters the standby state.

Thereafter, it is determined whether a polling response (ID_OK) message for a polling message has been received from each terminal station 11 (304).

If a polling response (ID_OK) message is not received from each terminal station 11, the polling message is repeatedly transmitted continuously (303), and if a polling response (ID_OK) message is received from the terminal station 11, it is a called terminal station. Or check whether the location tracking terminal (305).

If the responding terminal station 11 is the location tracking terminal station, the location of the responding location tracking terminal station is stored (306), and it is determined whether the location tracking for all the location tracking terminal stations has been performed (307).

As a result of the determination, if there is a remaining position tracking terminal station, a list of the terminal station 11 is made again (302), and if there is no remaining position tracking terminal station, it is returned.

On the other hand, if the responding terminal station 11 is the called terminal station, it switches to the designated channel (308), performs the incoming call procedure (309), and returns.

4 is a flowchart illustrating an embodiment of a terminal station in the incoming method according to the present invention.

First, when the terminal station 11 scans a channel (401) and receives a polling message, the terminal station 11 stores a link identifier (LID: Link IDdentification) and a terminal station identifier (PID: Portable IDentification) (402).

Thereafter, it is determined whether the received LID matches the LID stored in the terminal station 11 (403).

As a result of determination, if the received LID does not match the LID stored in the terminal station 11, it returns to the initial state and scans all the channels again (401), and if the received LID matches the LID stored in the terminal station 11, the PID It is determined whether or not it represents itself (404).

If it is not the PID indicating itself, it returns to the initial state to wait for the next polling message and scans all the channels again (401), and if the compared PID is an identifier indicating itself, receives a CIS message (406).

Next, it is determined whether the ICI bit in the received CIS message indicates an incoming or location tracking (407).

If the CIS bit is 0 indicating location tracking, a poll response (ID_OK) message for the polling message of the base station 12 is transmitted (408) and returned for scanning all channels.

On the other hand, if the CIS bit is 1 indicating that the incoming call is switched to the designated channel (409), after performing the incoming call procedure (410), it returns. At this time, if the designated channel is 0, the terminal station 11 searches for all channels and waits for a link establishment message from the base station 12.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

According to the present invention as described above, by reducing the time required to scan all channels unnecessarily in the terminal station, it is possible to shorten the overall incoming call time, and to use the radio channel efficiently.

Claims (6)

In the incoming method using the base station information and status messages in the second generation wireless telephone (CT-2) system, A first step of preparing a list of terminals to be received and tracked according to an incoming request and a location tracking request and polling the terminal; A second step of confirming whether the polling response message received from the terminal is received from the called terminal or the location tracking terminal; A third step of switching to a designated channel to perform an incoming call procedure when a polling response message is received from the called terminal; And Receiving a polling response message from the location tracking terminal and storing the location of the responding location tracking terminal and polling the remaining location tracking terminal; Incoming method in the second generation wireless telephone (CT-2) system, including. The method of claim 1, The first step is, A fifth step of determining whether there is an incoming request and a location tracking request for the terminal from an exchange or a control station; A sixth step of creating a list of the terminal if there is an incoming request and a location tracking request, and waiting until the request if there is no incoming request and a location tracking request; And A seventh step of repeatedly transmitting a polling message, a base station information, and a status (CIS) message to the terminal according to the created list; Incoming method in the second generation wireless telephone (CT-2) system, including. The method according to claim 1 or 2, The second step, An eighth step of determining whether a polling response message for a polling message is received from the terminal; A ninth step of repeatedly transmitting a polling message, a base station information, and a status (CIS) message back to the terminal when the polling response message is not received from the terminal as a result of the determination of the eighth step; And As a result of the determination of the eighth step, when the polling response message received from the terminal is received, the tenth step of determining whether it is received from the called terminal or the location tracking terminal. Incoming method in the second generation wireless telephone (CT-2) system, including. The method of claim 3, wherein The third step, An eleventh step of switching to a designated channel when a response message is received from the called terminal as a result of the determination of the tenth step; And A twelfth step of performing and returning an incoming call procedure to the designated channel; Incoming method in the second generation wireless telephone (CT-2) system, including. The method of claim 4, wherein The fourth step, A thirteenth step of storing a location of the located location tracking terminal when a response message is received from the location tracking terminal; A fourteenth step of determining whether all location tracking has been performed with respect to the location tracking terminal; As a result of the determination of the fourteenth step, if there is the remaining location tracking terminal, the list of the terminal is prepared again, and if there is no remaining location tracking terminal, the fifteenth step Incoming method in the second generation wireless telephone (CT-2) system, including. The method of claim 5, The base station information and status (CIS) message of the seventh step, Incoming Call Identifier (ICI) bit is set to 1 for the called terminal for which the incoming call is required, and IIC bit is set to 0 for the location tracking terminal for which location tracking is required. Incoming method in 2nd generation cordless telephone (CT-2) system.

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