JPH04176221A - Radio terminal communication system - Google Patents

Abstract

PURPOSE:To easily extend the radio frequency band in the system in operation by providing a transmitter-receiver having a frequency band used by each radio terminal equipment of plural groups to one radio base station, and if necessary selecting a transmitter-receiver through a command from an exchange station. CONSTITUTION:A radio base station 6 has a controller 1, a control channel use transmitter-receiver 2, a 1st group talking transmitter-receiver 3, and a 2nd group talking transmitter-receiver 4 and one terminal of each of the transmitter-receivers 2, 3, 4 connects to a radio terminal equipment via an antenna 5 and the other terminal connects to an exchange station via each channel. One terminal of the controller 1 connects to each of the transmitter- receivers 2, 3, 4 and the other terminal connects to the exchange station via a control information path respectively. The controller 1 stores in advance it that each of the transmitter-receivers 3, 4 accommodates each radio terminal equipment of 1st and 2nd groups and decides which of the transmitter-receivers 3, 4 is to be used by receiving an instruction from the exchange station as to which group the handled radio terminal equipment belongs.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is a 1!1 (1!1) system mainly used for mobile terminals (accommodating a plurality of radio base stations connected to a line end floor and using radio waves to connect radio terminals). The present invention relates to a wireless terminal communication system having an exchange connection function.

[Conventional technology]

Conventionally, in this type of wireless terminal communication system, a wireless base station either has a wideband transceiver so that it can be used over the entire frequency band, or has a transceiver that can be used within a limited frequency band.

[Problem to be solved by the invention]

The above-mentioned conventional wireless terminal communication system has technical limitations when the transmitter/receiver at the wireless base station has a wide band, and even if it can be realized, it will be expensive.
There was a problem in that it was not possible to expand the wireless resources to increase the capacity after the system was introduced.

An object of the present invention is to provide a wireless terminal communication system that solves the above problems by incorporating transmitters and receivers having a plurality of limited frequency bands and a control device that controls them into a wireless base station. be.

[Means to solve the problem]

A wireless terminal communication system according to the present invention is a wireless terminal communication system that accommodates a plurality of wireless base stations that connect wireless terminals via radio waves and has an exchange connection function between the wireless terminals. forming a communication channel with the wireless terminal using radio waves in at least one frequency band of the above, and at least one communication transmitter/receiver connected to the switching center via one communication channel; , stores this call transceiver and a group of wireless terminals (numbers) accommodated in this call receiver, specifies the call transceiver instructed by the exchange, and exchanges the instructed wireless terminal with the exchanger. The radio base station includes a control device connected to the radio base station.

〔Example〕

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

FIG. 1 is a block diagram showing one embodiment of the present invention. As shown in Figure 1, Fu! ! (Line) j (The ground station 6 has a control device 1, a control channel transceiver 2, a first group call transceiver 3, and a 27th!Y call transceiver 4,
Each of the transceivers 2, 3, and 4 has one end connected to the wireless terminal via the antenna 5, and the other end connected to the switching center via each channel.

The control device 1 is connected on one side to each of the transceivers 2φ3 and 2φ4, and on the other side to the exchange via a control information path. The control device 1 stores in advance that each of the communication transceivers 3 and 4 accommodates a first group and a second group of wireless terminals, and receives instructions from the switching center as to which group the handled wireless terminal belongs to. By doing so, it can be determined which of the telephone transmitter/receivers 3 and 4 is to be used.

FIG. 2 is an explanatory diagram showing an example of the usage relationship between wireless terminal groups and usage frequency bands. The relationship between each transceiver and the frequency band will be explained with reference to FIG. 2 and FIG. 1.

As shown in the figure, the radios of the 1st group and the 2nd ′J+Y☆
;! Both ends of J transmit and receive control signals using frequency band f. Therefore, the wireless base station 6 is equipped with a control channel transceiver 2 for the frequency band fi, and is connected to the switching center via the control channel.

The first group of wireless terminals uses the frequency band f2 as the communication channel.
- Since f3 is used, the first group call transmitter/receiver 3 is tuned to the frequency bands f2 and f3, and connected to the exchange through the first group channel.

Similarly, the second group of wireless terminals uses frequency bands f3 and f4, and the second group of communication transceivers 4 uses frequency bands f3 and f4.
and connect to the exchange through the second group channel.

That is, each of the frequency bands f2 and f4 is a frequency band unique to the first group and the second group, and the frequency band f3 is a frequency band common to the first group and the second group.

Therefore, when instructed to monitor the channel in the frequency band f2, the first group communication transceiver 3 and the first group channel are selected. In the case of frequency band f3, one of the transceivers 3 and 4 is selected according to the group designation from the exchange.

The wireless terminal described in this embodiment may be a mobile terminal or a fixed terminal. Further, although only two groups have been described, it can be realized in the same manner even if there are a plurality of groups.

〔Effect of the invention〕

As explained above, in the present invention, a transceiver having a frequency band that can be used by each of multiple groups of wireless terminals is installed in one poultry-free base, and if necessary, the transceiver is turned on in response to instructions from the switching center. By selecting this option, the radio frequency band can be easily expanded in an operating system, which has the effect of constructing an economical system that does not require a wideband transmitter/receiver.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the wireless terminal communication system of the present invention, and FIG. 2 is an explanatory diagram showing an example of the frequency band used by the wireless terminal. 1...control device, 2...control channel transmission/reception? (
, 3, 4... Transmitter/receiver for telephone calls, 6... Wireless base station.

Claims (1)

[Scope of Claims] A wireless terminal communication system that accommodates a plurality of wireless base stations that connect wireless terminals via radio waves and has an exchange connection function between the wireless terminals, which accommodates a group of communication terminals and has a predetermined at least one base station. at least one communication transmitter/receiver that forms a communication channel with the wireless terminal using radio waves in two frequency bands, and connects to an exchange via one communication channel; A transmitter/receiver and a group of wireless terminals (numbers) accommodated in this telephone transmitter/receiver are stored, the telephone transmitter/receiver instructed by the switching center is specified, and the instructed wireless terminal is connected to the switching center. A wireless terminal communication system characterized in that the wireless base station has a control device.