JPH0653894A - Radio base station for mobile communication - Google Patents

Abstract

PURPOSE:To solve problems such as the difficulty of land obtaining and undesivable influence to be extended upon the scenery of a city in respect to a radio base station for mobile communication such as an automobile telephone. CONSTITUTION:The radio station is provided with a strut 30 for supporting a street lamp, an antenna 20 mounted on the strut 30, a connection terminal to a cable transmission line 40 connected to a telephone exchange network, transmitting/receiving parts 12, 13 connected between the connection terminal and the antenna 20, a power supply part 15 for receiving AC power from a feeder 32 shaved with the street lamp and supplying operation power to the transmitting/receiving parts 12, 13, and a body part 10 fixed to the inside of the strut 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication radio base station installed between a mobile telephone terminal such as a car telephone or a pager and a telephone exchange network.

[0002]

2. Description of the Related Art In recent years, it has been necessary to expand the service area by adding radio base stations for mobile phones. In the mobile telephone system, from the viewpoint of effective use of frequencies, the individual frequency bands are centered around individual wireless base stations to make repeated use of the same frequency band. To secure a wide service area, a large number of radio base stations are required. As a place to install such a radio base station, it is desirable to have a high place with good visibility and a place where commercial power can be easily supplied. It is also necessary to consider aesthetics so as not to spoil the cityscape.

Recently, it is difficult to obtain a site for constructing a radio base station, so that the service area cannot be expanded as planned. In order to overcome such a situation, Japanese Patent Application No. 3-4627 discloses a technique in which a wireless relay device is provided on a pole such as a tower or a telephone pole that supports a transmission / distribution line of commercial power. The pole wireless relay device is provided with an antenna used for communication with a mobile telephone terminal, an antenna used for communication between wireless relay devices, a microwave band antenna used for communication with a telephone station, and the like.

[0004]

Recently, in order to maintain the cityscape, it is often the case that telephone poles are removed and transmission and distribution lines are buried underground, especially in office districts where mobile phones are frequently used. Even finding a utility pole is getting harder. For this reason, it is becoming more and more difficult to secure the installation location of the pole wireless relay device as disclosed in the above patent publication. Further, in the above-mentioned pillar wireless relay device, there is a problem that the cityscape is spoiled because the main body portion is exposed to the outside. Therefore, it is an object of the present invention to provide a radio base station which can easily secure the installation place and does not spoil the cityscape.

[0005]

A mobile communication radio base station according to the present invention comprises a pillar for supporting a street light, an antenna attached to the pillar, and a connection terminal to a wire transmission line connected to a telephone exchange network. The column includes a transmitter / receiver disposed between a connection terminal to a wired transmission line and the antenna, and a power supply unit that receives AC power from a power supply line common to the street light and supplies operating power to the transmitter / receiver. And a body part that is attached to the inside of the.

[0006]

The conditions for selecting a station for a mobile radio base station are that a commercial power source can be secured and that a connection to a wired transmission line connected to a public switched telephone network is easy.
Street lights meet these requirements. The main part of the mobile communication wireless base station is stored inside the street light,
Commercial power can be easily secured from the power line to the street light. Further, the connection to the wired transmission line connected to the public switched telephone network can be easily realized in the form of an underground cable. Voice signals and control signals are transmitted and received between the main body of the wireless base station and the mobile telephone terminal via the antenna attached to the street light.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an external view showing the structure of a radio base station for a car telephone according to an embodiment of the present invention. Road lights, 32 is a commercial power supply line, and 40 is a call / control line using a communication cable.

[0008] Among a number of street lights arranged along the road, at regular intervals such that the communication zone is not interrupted, or at appropriate intervals that are expanded or contracted in consideration of the conditions of the road and surrounding buildings. A plurality of street lights are selected in, and the main body 10 of the packaged wireless base station is housed inside each pillar 30. The main body 10 includes a support 30
The pillar 30 may be structured so as to be embedded therein after the manufacture of
The structure may be manufactured integrally with the above.

On the upper portion of the support column 30, a vertically polarized horizontal plane omnidirectional or an appropriate horizontal plane directional antenna 20 for wireless communication with a mobile station mounted on an automobile is attached. . The antenna 20 may be mounted on the outer wall surface of the pillar 30 as a reflector and has a fan-shaped horizontal in-plane directivity within a range that does not impair the appearance of the street light.

FIG. 2 shows the structure of the main body 10 with the antenna 2
0 is a block diagram showing a connection state with a power feeding line 32 and a communication cable 40, 11 is a shared antenna device, 12
Is a transmission / reception device for communication, 13 is a transmission / reception device for control, 14 is a base station control device, and 15 is a power supply unit. A plurality of call transmitting / receiving devices 12 and control transmitting / receiving devices 13 are installed for each of a plurality of call channels and control channels, and
Antenna 20 sharing these plural call / control channels
An antenna sharing device 11 is installed in order to connect to.

The base station controller 14 includes a communication cable 40.
Is connected to a wireless line control station via a telephone call / control line, and controls the wireless base station main unit 10, mobile station monitoring, channel designation and switching, position registration control, interface with wireless line control station, etc. I do. Power supply 32
Receives commercial AC power from the power supply line 32 common to the street light 31, creates various types of stabilized DC power, and supplies these to the transceivers 12 and 13 in the main body 10 and the base station controller. To do.

The radio base station of the car telephone shown in FIGS. 1 and 2 is a radio line control station connected to the communication cable 40, a car telephone exchange station, a home memory station, or a relay exchange or a subscriber in a fixed telephone exchange network. In collaboration with an exchange, etc., call connection from a mobile station to a fixed telephone or another mobile station, an incoming call connection on the opposite route, channel switching during a call, disconnection / restoration of a line associated with call termination, etc. To do.

For example, at the time of making a call from the mobile station, the following operation is performed. When the user of the mobile station off-hooks the telephone terminal, a call signal is sent from the mobile station to the call control channel, and the call signal is received by the control transceiver 13 via the antenna 20 and the antenna sharing device 11. A reception level in the control transmitting / receiving device is added to the calling signal, and the signal is sent to the communication cable 40 connected to the wireless line control station via the base station control device 14. In the radio network controller, if there are multiple mobile stations that have received the call signal from the mobile station, the radio base station that receives the call signal at the highest reception level is determined to be the radio zone in which the mobile station is located, and One of the idle channels is selected and this channel number is transmitted to the downlink incoming control channel via the corresponding radio base station. The mobile station switches to the specified call channel, sets the call path to the car switching center through the continuity test of this call channel, and then sends the dialed digits from the calling mobile station. The call path is set between the calling side telephone and the called side telephone after calling and answering the fixed side telephone or mobile station of the called side, and the telephone call is started.

For the operation of the automobile telephone system including the radio base station of this embodiment, refer to the book entitled "Car Telephone" published by the Institute of Electronics, Information and Communication Engineers in 1985, if necessary.

The configuration and operation of the mobile communication radio base station of the present invention has been described above by taking the case of a car telephone as an example.
It goes without saying that the present invention can also be applied to a mobile communication radio base station such as a pager having only a radio transmitter for calling a mobile unit.

[0016]

As described in detail above, since the radio base station for mobile communication of the present invention is configured to be attached to the pole of a street light, it is not necessary to newly acquire a site for installing the radio base station. Thus, it is possible to effectively solve the difficulty of land acquisition in an office area where mobile phones are frequently used.

The mobile communication radio base station of the present invention is
Since it is attached to a street light, there is an advantage that it is easy to secure a commercial power supply by using the power supply line and also easy to connect with a communication cable.

Further, the radio base station for mobile communication of the present invention is
Since the main body is attached to the inside of the pillar of the street light, there is also an advantage that the cityscape is not damaged.

[Brief description of drawings]

FIG. 1 is an external view showing a configuration of a radio base station of a car telephone according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of the main body part of FIG. 1 together with the relationship between an antenna, a communication cable, and a power supply line.

[Explanation of symbols]

 10 Main Body 21 Antenna 30 Support 31 Street Light 32 Power Supply Line 40 Communication Cable

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Ota 2-6-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Corporation

Claims (4)

[Claims] 1. A strut for supporting a street light, an antenna attached to the strut, a connection terminal to a wire transmission line connected to a telephone exchange network, and a connection terminal between the wire transmission line and the antenna. A transmitting / receiving unit and a power supply unit for supplying operating power to the transmitting / receiving unit by receiving AC power from a power supply line common to the streetlight and a main body part mounted inside the pillar. Radio base station for mobile communication. 2. A base station control device connected to a radio line control station of a car telephone system via the wired transmission path, the antenna sharing device, the call transmitting / receiving device, the control transmitting / receiving device, and the transmitting / receiving unit. The radio base station for mobile communication according to claim 1, further comprising: 3. A pillar for supporting a street light, an antenna attached to this pillar, a connection terminal to a wire transmission line connected to a telephone exchange network, and a connection terminal to the wire transmission path and the antenna. And a main body part attached to the inside of the column, the power supply part supplying AC power from the power supply line common to the transmitting part and the street light to supply operating power to the transmitting part. Radio base station for mobile communication. 4. The mobile communication radio base station according to claim 3, wherein the transmitting unit includes an inter-station phase compensator and a transmitter for transmitting a calling signal to a pager receiver.