JPH05235860A - Radio communication system - Google Patents

Abstract

PURPOSE:To eliminate the need for a processing time for data exchange and a control procedure by providing a transmitter-receiver in a control station and connecting a base station and the control station with a radio frequency transmission line. CONSTITUTION:A control section 36 of a control station 30 connects one of transmitter-receivers 31-33 for each base station 20 to a base station 20 via a radio frequency transmission line 40 under the control of a transmission reception line selector 34. Upon the receipt of a communication line use permission request by a call from a radio communication equipment 10, one of the transmitter-receivers 31-33 whose radio frequency signal reaches a prescribed level is selected and a radio channel forming a communication line is informed the communication equipment 10. Then an idle transmitter-receiver of a succeeding order is connected to the base station 20 for preparing for a succeeding call. Thus, the transmitter-receivers 31-33 for a radio frequency signal to be sent / received by an antenna 21 are provided to the control station 30 to eliminate the need for a data communication installation between the control station 30 and the base station 20 thereby eliminating the need for the processing time for data conversion and a control procedure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control station for connecting at least one base station on one side and one exchange on the other side and allocating a wireless channel to a wireless communication device via the base station. The present invention relates to a wireless communication system.

[0002]

2. Description of the Related Art In the conventional wireless communication system, a base station is provided with a number of transceivers corresponding to a predetermined traffic amount, and a base station and a control station are connected by a transceiver-compatible data communication device.

FIG. 3 is a block connection diagram showing an example of a conventional method. The conventional technique will be described with reference to FIG.
In FIG. 3, the wireless communication device 10 communicates through the assigned wireless channel via the antenna 11. That is, the wireless communication device 10 forms a communication path with the base station 80 and the allocated wireless channel in the range of the location.

The base station 80 includes transceivers (1) 81 to (G)
It is equipped with 82 and has G communication paths. The communication path formed by the transceivers (1) 81 to (G) 82 is connected to the control station 90 by the transmission path 71 via the data communication device 83, while the antenna 84 of the base station 80 and the antenna 11 of the wireless communication device 10 are connected. Connects by transmitting and receiving signal radio waves at radio frequency between and.

The control station 90 includes a plurality of base stations 80 and a transmission line 7.
While connecting through 1 to 72, it connects with an exchange (not shown) to form a communication path. The control surface 90 has data communicators 91 to 92, an exchange interface section 93 and a control section 94, which are connected by a bus 95.

The data communicators 91 to 92 are connected to the data communicator 83 of each base station 80 and execute information transmission for each communication path.

The exchange interface section 93 is connected to the exchange to extend the communication path from the control station 90 to the exchange.

The control unit 94 is mainly for detecting outgoing / incoming calls of the wireless communication device 10, allocating a wireless channel, setting the base station 80 to which a communication path is connected, and notifying the wireless communication device 10 of this setting information. Perform processing control.

Therefore, the transfer of communication information between the base station 80 and the control station 90 is performed by predetermined data communication using a data communication device that terminates the transmission path.

[0010]

As described above, in the conventional wireless communication system, the data communication means is used between the base station and the control station, so that the data conversion and the processing time for this control procedure are required. was there.

An object of the present invention is to provide a wireless communication system which solves the above problems by providing a transceiver in a control station and omitting the use of a data communication device.

[0012]

SUMMARY OF THE INVENTION A wireless communication system according to the present invention uses at least one base station that is coupled to a plurality of wireless communication devices by a wireless channel and a transmission line that connects the base station and the base station. And a control station that controls the allocation of radio channels used by the wireless communication device, and includes a transceiver that directly executes at least one of transmission and reception of a wireless frequency signal by the wireless frequency to the wireless communication device.

[0013]

The present invention will be described below with reference to the drawings.

In FIG. 1, when a plurality of wireless communication devices 10 move within a predetermined area, the antenna 1 of the wireless communication device 10 is used.
1 and the antenna 21 of the base station 20 are wirelessly connected, and the plurality of base stations 20 are connected to the control station 30 and the radio frequency transmission line 40.
Are connected with.

The base station 20 connects the radio frequency transmission line 40 and the antenna 21 and adjusts the level of the radio frequency signal transmitted from the antenna to a standard value, while the power level of the radio frequency signal received by the antenna 21 is adjusted to the standard value. It has a gain adjuster 22 that collectively adjusts to a predetermined value on the communication path.

The control station 30 includes N transceivers (1) 31-
(N) 33, a transmission / reception path selector 34, an exchange interface unit 35, and a control unit 36, which are connected by a bus 37.

The transceivers (1) 31 to (N) 33 are assigned a wireless channel as a communication path under the control of the control unit 36, and are connected to the exchange through the exchange interface unit 35.

The transmission / reception path selector 34 connects the designated one, for example, the transmission / reception apparatus (2) 32 to the radio frequency transmission path 40 according to an instruction from the control unit 36.

To receive a call from the wireless communication device 10,
One of the transceivers (1) 31 to (N) 33 is always connected to the base station 20 via the radio frequency transmission line 40 by the transmission / reception line selector 34.

Radio frequency to the base station 20 to which the transmitter / receiver (2) 32 is assigned when the radio channel of the transmitter / receiver (2) 32 is assigned and used as a communication path while being connected by an outgoing call or an incoming call. Another free space, for example, a transceiver (N) 33 is connected to the transmission line 40.

Therefore, as shown in FIG.
First, one transceiver for each base station 40 is connected to the base station 20 under the control of the transmission / reception path selector 34 (S1).

Next, when the control unit 36 receives a communication path use permission request including a request for assignment of a wireless channel by a call from the wireless communication device 10 (S2), the received radio frequency signal reaches a predetermined level value. One of the transceivers, for example, the transceiver (1) 31 is selected, the wireless channel forming this communication channel is notified to the wireless communication device 10 (S3), and the communication channel setting by the connected transceiver is performed. finish.

Next, the control unit 36 prepares for the next call and connects the idle transceivers in the next order to the base station 20 (S4), and ends the procedure.

When the signal level during reception falls below a predetermined value, the control unit 36 detects this and detects the connected base station 20.
The signal level of the corresponding wireless channel is compared from the surrounding base stations, the communication path is set to the base station with the strongest level, and the communication path with the lowered power level is cut off.

Further, the control station 30 allocates one of the wireless channels in the base station which can call the called wireless communication device when receiving an incoming call from the exchange, and sets a communication path.

In the present embodiment, it has been described that the control unit connects at least one transceiver for each base station before a call is generated, but since the control signal can be directly connected from the transmission / reception path selector to the control unit, the control unit After accepting a call, can select a transceiver, connect to a base station, and allocate a communication path.
In a small scale, the transceiver of the control station may be directly connected to the radio frequency transmission path to the base station, and the transmission / reception path selector may be omitted.

Further, according to the present embodiment, a small-scale, for example, premises-scale mobile radio in which radio frequency signals transmitted and received by the antenna are directly coupled from the control station to the base station through a transmission line such as a coaxial cable or a waveguide. Suitable for communication. If the radio frequency signal has a sufficient predetermined level, the base station gain adjuster can be omitted. Further, when the transmission path is long, a relay amplifier may be inserted in the middle to adjust the gain.

Although the bidirectional system has been described as the transmitter / receiver, if the wireless communication device is a paging system dedicated to both outgoing and incoming calls, for example, the transmitter / receiver has a function of either transmission or reception. Good. The wireless communication device may be mobile or fixed.

[0029]

According to the wireless communication system of the present invention, since the transmitter / receiver of the radio frequency signal transmitted / received by the antenna is concentrated from the base station to the control station, data between the control station and the base station can be obtained. There is an effect that the communication equipment is not necessary and the data conversion and the processing time of this control procedure are unnecessary.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing an example of a main operation procedure of the control station of FIG.

FIG. 3 is a block connection diagram showing an example of a conventional method.

[Explanation of symbols]

 10 wireless communication device 11,21 antenna 20 base station 22 gain adjuster 30 control station 31-33 transceiver 34 transceiver channel selector 35 exchange interface unit 36 control unit

Claims (1)

[Claims] 1. A method for transmitting and receiving a radio frequency signal at a radio frequency through at least one base station coupled to a plurality of radio communication devices by radio channels and a transmission line connected to the base station and the base station. And a control station for controlling allocation of a wireless channel used in the wireless communication device, the wireless communication system including a transceiver that directly executes one of them.