JP2659346B2 - Subscriber calling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber calling system for mobile communication.

[0002]

2. Description of the Related Art A conventional mobile communication subscriber calling method is as follows.
As shown in FIG. 2, the exchange 20a is provided in the exchange 20a for each of the 9 communication channel control areas.
X) 7, control channel receiver (CRX) 6, control channel transmitter (CTX) installed in paging control area 10
5, and a common central controller (CC) 2, a communication path (N
W) 1, a relay circuit (TRK) with the communication path (NW) 1,
Control circuit (CT) for transceivers (TRX) 7 and (CTX) 5
L) 4.

When calling a subscriber 8 from the exchange 20a, the central control unit (CC) 2 transmits a control channel transmitter (CT) corresponding to a call control area 10 registered in advance.
X) 5 is activated and a paging signal including the number of the subscriber 8 is transmitted to all the traffic channel control areas 9 in the paging control area 10. The subscriber 8 always receives the control channel, and upon receiving a paging signal including the own subscriber number, transmits a paging response signal. The call response signal from the subscriber 8 is received under the best conditions by the control channel receiver (CRX) 6 in the communication channel control area 9 where the subscriber 8 is located, and is transmitted via the control circuit (CTL) 4 to the central control unit. (CC) 2. This allows the central controller (C
C) 2 can determine that the subscriber 8 exists in the communication channel control area 9 having the control channel receiver (CRX) 6 that has received the call response signal under good conditions, and the communication channel in the communication channel control area 9 can be determined. Select an empty channel required for a call from.

[0004]

In this conventional subscriber calling system, a control channel receiver (CR) for receiving a call response signal for each communication channel control area in order to determine the communication channel control area where the subscriber exists.
X), the number of control channel receivers (CRX) increases when the paging control area is expanded or the communication channel control area is subdivided.

[0005]

The subscriber calling system of the present invention comprises an exchange for managing a paging control area including a plurality of communication channel control areas for controlling mobile terminals in each area, wherein the exchange comprises Storage means for storing use status information of a plurality of call channels set to be used in each of the plurality of call channel control areas; and storing one free channel for each area of the plurality of call channel control areas. Selecting means for selecting with reference to the means, a plurality of communication means for transmitting a vacant signal set in advance in the unit of the communication channel control area using an empty communication channel selected by the selection means, and a plurality of A first signal including information on a free communication channel and a call signal for calling the mobile terminal is transmitted to the call control area. A first transmitting unit for transmitting, a first receiving unit for receiving a second signal including a free call channel information and a response signal selected by the mobile terminal, and a use of the selected free call channel. Control means for permitting the set communication means to communicate with the mobile terminal that transmitted the response signal, and for storing in the storage means that the selected vacant call channel is in use, The mobile terminal receives an empty signal based on the plurality of empty communication channels and the first signal, selects an empty communication channel having a good communication level among the plurality of empty communication channels, and outputs the second signal. It has a second transmitting means for transmitting.

A subscriber calling system according to the present invention includes an exchange for managing a call control area including a plurality of communication channel control areas for controlling mobile subscriber terminals in respective areas, wherein the exchange comprises the plurality of exchanges. A communication channel transceiver that transmits and receives a predetermined signal to and from a subscriber terminal in each of the communication channel control areas using an empty communication channel; and A control channel transmitter for transmitting a call signal together with a free call channel information to the call control area and a subscriber number of the calling subscriber terminal; and the free call channel information selected from the subscriber terminal called by the control channel. A control channel receiver for receiving a call response signal sent with the control channel receiver; A first control circuit for controlling a communication channel transceiver and the control channel transmitter and receiver; a communication path for forming a communication path between a plurality of subscriber terminals via the communication channel transceiver; A plurality of relay circuits for relaying each of the communication channel transceivers to the communication path; a storage device for storing a use state of each of the communication channel control areas; and a central control for controlling the entire switchboard Device, wherein each of the plurality of subscriber terminals is a predetermined empty signal using an empty communication channel transmitted from each of the plurality of communication channel transceivers, and from the control channel transmitter. The plurality of vacant call channel information, the subscriber number, and the call signal in the call control area to be transmitted; And a transceiver for transmitting, on the control channel, a vacant communication channel information and a response signal having a good reception level selected and receiving the selected reception level of the plurality of vacant communication channels. And a second control circuit for selecting a good vacant communication channel.

[0007]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, the present embodiment is an exchange (EX) for managing a paging control area 10 including a plurality of communication channel control areas 9 for controlling a mobile subscriber terminal (TRM) 8 in each area. The exchange (EX) 20 includes a plurality of communication channel control areas 9.
A communication channel transceiver (TRX) 7 for transmitting / receiving a predetermined signal to / from a subscriber terminal (TRM) 9 in each area using an available communication channel;
A control channel transmitter (CTX) 5 for transmitting a call signal together with a free call channel information to a call control area 10 and a subscriber number of a subscriber terminal (TRM) 8 to call using a predetermined control channel; A control channel receiver (CR) that receives a paging response signal sent together with vacant communication channel information selected from the subscriber terminal (TRM) 8 called by the control channel.
X) 6 and a plurality of communication channel transceivers (TRX) 7
And a control circuit (CTL) 4 for controlling a control channel transmitter (CTX) 5 and a receiver (CRX) 6 and a communication path between a plurality of subscriber terminals (TRM) via a communication channel transceiver (TRX) 7. Communication path (NW) 1
And a plurality of relay circuits (T) that relay each of the plurality of communication channel transceivers (TRX) 7 to the communication path (NW) 1.
RK) 3, a storage device (MM) 21 for storing the use status of the channel of each of the plurality of communication channel control areas 9, and a central control device (CC) 2 for controlling the entire exchange (EX) 20. And a subscriber terminal (TRM)
Reference numeral 2 denotes a predetermined idle signal using an empty communication channel transmitted from each of the plurality of communication channel transceivers (TRX) 7 and a control channel transmitter (CT).
X) receiving a plurality of vacant call channel information, a subscriber number, and a call signal in the call control area 10 transmitted from 5 and controlling the vacant call channel information of a good reception level selected and the response signal; A transmitter / receiver (TRX) 81 for transmitting a channel, and a control circuit (CTL) 8 for measuring reception levels of a plurality of received free communication channels and selecting an available communication channel having a good reception level.
And 2.

Next, the operation of this embodiment will be described.

When a subscriber terminal (TRM) 8 is called for the first time, the central control unit (CC) 2 checks whether there is an empty call channel in every call channel control area 9 unit included in the call control area 10 registered in advance. The storage device (MM) 2 is searched to determine whether or not the vacant communication channel information is selected, and at the same time, the communication channel transceiver (TRX) 7 corresponding to the selected vacant communication channel is started to transmit a predetermined vacant signal. Send.

Next, the central control unit (CC) 2 activates the control channel transmitter (CTX) 5 to transmit a call signal including the subscriber number and the information of the selected free communication channel into the call control area 10. Let it.

[0013] When the subscriber terminal (TRM) 8 receives a call signal including the vacant communication channel information and the own subscriber number on the control channel by the transceiver (TRX) 81, it simultaneously transmits a plurality of available vacancies. The transceiver (TRX) 81 sequentially receives vacant signals from the communication channels of (1) and (2), and measures the respective reception levels by the control circuit (CTL) 82 to select an empty communication channel with a good reception level. If an available call channel with a good reception level is selected,
The subscriber terminal (TRM) 8 adds the free communication channel information having a good reception level to the call response signal and transmits the signal from the transceiver (TRX) 81 on the control channel.

The paging response signal received by the control channel receiver (CRX) 6 is transmitted to the central control unit (CC) 2 via the control circuit (CTL) 4, and at this time, an idle communication channel having a good reception level. Since the information is also transmitted, the central control unit (CC) 2 determines that the subscriber terminal (TRM) 8 exists in the communication channel control area 9 which has selected the empty communication channel information having a good reception level. can do.

The central controller (CC) 2 stores all communication channel information not selected by the subscriber terminal (TRM) 8 in the storage device (MM) 21 as empty, and the subscriber terminal (TRM) 8 selects the communication channel information. The vacant call channel information having a good reception level can be selected again to be used as a call channel of the subsequent subscriber terminal (TRM) 8.

[0016]

As described above, according to the present invention, in the exchange, channel selecting means for selecting one idle communication channel in each of a plurality of communication channel control areas in the call control area, An idle channel activation means for activating a transmitter; and transmission means for transmitting the idle call channel information by adding the idle call channel information to a subscriber call signal, and the subscriber terminal has an idle call channel added when the call signal is received. Receiving means for scanning all idle communication channels specified by the information and receiving a predetermined idle signal, and control means for selecting idle communication channel information having a good reception level and adding it to a call response signal to transmit By providing information indicating the position of the call channel control area where the subscriber terminal is located, Since it is possible to determine the presence area received on your channel receiver, it is not necessary to the equipment control channel receiver to the call channel control area basis, there is an effect that it is possible to reduce the conventionally facilities.

Further, the paging control area can be expanded and subdivided more easily than before, and the service efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Communication channel (NW) 2 Central control unit (CC) 3 Relay circuit (TRK) 4 Control circuit (CTL) 5 Control channel transmitter (CTX) 6 Control channel receiver (CRX) 7 Communication channel transceiver (TRX) 8 Subscriber terminal (TRM) 9 call channel control area 10 call control area 20 exchange (EX) 81 transceiver (TRX) 82 control circuit (CTL)

Claims (2)

(57) [Claims] 1. An exchange for managing a paging control area including a plurality of communication channel control areas for controlling mobile terminals in each area, wherein the exchange is set to be used in each of the plurality of communication channel control areas. Storage means for storing usage state information of a plurality of call channel control areas, selecting means for selecting an empty channel in each of the plurality of call channel control areas by referring to the storage means, and selecting A plurality of communication means for transmitting an empty signal which is preset in units of the communication channel control area using an empty communication channel selected by the means; and a call for calling information of the plurality of empty communication channels and the mobile terminal. A first transmitting unit for transmitting a first signal including a signal to the paging control area; and the mobile terminal. First receiving means for receiving a second signal including the selected free call channel information and a response signal; and transmitting the response signal to the communication means for which use of the selected free call channel is set. Control means for permitting communication with the selected mobile terminal and for storing in the storage means that the selected vacant call channel is in use, wherein the mobile terminal has an empty signal based on the plurality of vacant call channels. And a second transmitting means for receiving the first signal and selecting a vacant communication channel having a good communication level among the plurality of vacant communication channels and transmitting the second signal. Subscriber calling method to be performed. 2. An exchange for managing a paging control area including a plurality of traffic channel control areas for controlling mobile subscriber terminals in respective areas, wherein the exchanges are respectively provided for the plurality of traffic channel control areas. A call channel transceiver for transmitting / receiving a predetermined signal to / from a subscriber terminal in an area using a vacant call channel; and a vacant call to the call control area using a predetermined control channel. A control channel transmitter for transmitting a paging signal together with the channel information and the subscriber number of the calling subscriber terminal; and a call response sent together with the free call channel information selected from the subscriber terminal called by the control channel. A control channel receiver for receiving a signal, and the plurality of communication channel transceivers A first control circuit for controlling the control channel transmitter and receiver, a communication path for forming a communication path between a plurality of subscriber terminals via the communication channel transceiver, and the plurality of communication channel transceivers A plurality of relay circuits for relaying each of the communication channels to the communication path, a storage device for storing a use state of a communication channel included in each of the plurality of communication channel control areas, and a central control device for controlling the entire exchange. Each of the plurality of subscriber terminals receives a predetermined empty signal using an empty call channel transmitted from each of the plurality of call channel transceivers, and a signal transmitted from the control channel transmitter. Receiving and selecting the plurality of vacant call channel information, the subscriber number, and the call signal in the call control area A transmitter / receiver for transmitting idle communication channel information and a response signal with a good communication level on the control channel; and measuring reception levels of the received plurality of empty communication channels to determine an empty communication channel with a good reception level. And a second control circuit for selection.