JPH05259948A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To improve the economical properties of a radio communication equipment by getting together the cables to be wired into a single piece and also omitting a power distributor. CONSTITUTION:A leakage coaxial cable 11 is provided on the ceilings of stores A-C and a directional beam antenna 12 is connected to one of both ends of the cable 11. The radio slave stations 16a, 16b and 16c containing the whip antennas 15a, 15b and 15c are connected to the POS terminals 14a, 14b and 14c of the stores A, B and C respectively. Meanwhile a radio master station 19 containing a whip antenna 18 is connected to a host computer 17 provided at a control center. Then the space transmission of electromagnetic waves is carried out between the station 19 and the antenna 12 and also between the stations 16a-16c and the space exposed part of the cable 11 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, when wireless data communication is performed between a host computer installed in a management office in a building and a POS (Point of Sales) terminal of each tenant. Wireless communication device.

[0002]

2. Description of the Related Art For example, in a building, each room is partitioned by a concrete wall, and the shutter at the entrance is closed after the store is closed. Therefore, if wireless data communication is performed between the POS terminal installed by the tenant in each room and the host computer installed in the management office after closing, each room becomes a space like a shielded room. As it is, P of each room as it is
Wireless data communication between the OS terminal and the host computer is not possible.

For this reason, conventionally, the wireless communication device shown in FIG. 3 has been used to enable wireless data communication between the POS terminal in each room and the host computer. That is, the coaxial cables 1a, 1b, 1c are installed on the ceilings of the stores A, B, C, etc., and the whip antennas 2a, 2b, 2c are provided at the tips of the coaxial cables 1a, 1b, 1c arranged in the stores. Is attached, and the rear end of each coaxial cable 1a, 1b, 1c is connected to the power distributor 3 installed in the management office. A whip antenna 4 is connected to the power distributor 3. Store A, Store B,
POS terminals 5a, 5b, 5c are arranged in the store C, and wireless slave stations 7a, 7b, 7 provided with whip antennas 6a, 6b, 6c on the POS terminals 5a-5c, respectively.
c is connected. A host computer 8 is installed in the management office, and a wireless master station 10 provided with a whip antenna 9 is connected to the host computer 8.

Host computer 8 and each POS terminal 5a
5c to wirelessly communicate data with the wireless master station 10
The whip antenna 9 and the whip antenna 4 form a communication path by spatial propagation of electromagnetic waves, and each wireless slave station 7
The whip antennas 6a to 6c of a to 7c and the whip antennas 2a, 2b and 2c of the coaxial cables 1a to 1c form a communication path by spatial propagation of electromagnetic waves. This allows the host computer 8 and the POS terminals 5a to 5c to perform wireless data communication via the coaxial cables 1a to 1c, even if each store has a space like a shielded room.

[0005]

However, in such a conventional device, a coaxial cable is required for each room, and when the number of tenants (the number of rooms) increases, the number of ports of the power distributor increases accordingly. In addition, there is a problem that the cable wiring work is troublesome and takes time.

Therefore, according to the present invention, the number of cables to be wired is one.
It is an object of the present invention to provide a wireless communication device which is excellent in economy since it can be a book and a power distributor can be dispensed with.

[0007]

SUMMARY OF THE INVENTION The present invention provides a leaky coaxial cable arranged in a plurality of spaces in which it is difficult to propagate electromagnetic waves, an antenna connected to the tip of the leaky coaxial cable, and this antenna. A wireless master station that forms a wireless communication path by spatial propagation of electromagnetic waves, a wireless slave station that is arranged in each of the spaces, and that forms the wireless communication path by the leaky coaxial cables that pass through each space and the spatial propagation of electromagnetic waves. It consists of

[0008]

In the present invention having such a structure, the radio master station propagates electromagnetic waves spatially with the antenna connected to the tip of the leaky coaxial cable, and each radio slave station has difficulty in propagating electromagnetic waves spatially. The electromagnetic wave is spatially propagated to the leaky coaxial cable passing through each space, whereby the wireless master station and each wireless slave station can perform data communication via one leaky coaxial cable.

[0009]

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

As shown in FIG. 1, one leaky coaxial cable 11 is installed on the ceiling of store A, store B, store C, etc.,
The gain is 2.14 at one end of the leaky coaxial cable 11.
A beam antenna 12 having a high gain of dB or more is connected, and a terminator 13 for impedance matching is connected to the other end.

In store A, store B, and store C, there are P
OS terminals 14a, 14b, 14c are arranged, and each P
The OS terminals 14a to 14c have whip antennas 15a,
Wireless slave stations 16a, 16b, 16 provided with 15b, 15c
c is connected.

In addition, the management office has a host computer 1
7, a wireless master station 19 provided with a whip antenna 18 is connected to the host computer 17.

The beam antenna 12 has its directivity aligned with the whip antenna 18 of the radio master station 19.

Each of the whip antennas 15a to 15c,
18 are wireless slave stations 16a to 16c and a wireless master station 19 respectively.
It is an integrated type and the gain is set to 2.14 dB or less.

Each store A of the leaky coaxial cable 11,
As shown in FIG. 2, a plurality of emission slits 20, ... Are provided in the space exposed through B and C. Reference numeral 21 in the drawing is a wall that divides the room.

In the embodiment having such a configuration, when data communication is performed between the host computer 17 and each of the POS terminals 14a to 14c, the whip antenna 18 and the beam antenna 12 of the radio master station 19 propagate the electromagnetic waves in space. A communication path is formed by each of the wireless slave stations 16a to 16c.
The whip antennas 15a to 15c and the exposed space of the leaky coaxial cable 11 form a communication path by spatial propagation of electromagnetic waves.

As a result, even if each store is a space such as a shield room, the host computer 17 and each PO are
Wireless communication with the S terminals 14a to 14c is possible via the leaky coaxial cable 11.

That is, the data of the host computer 17 is wirelessly transmitted from the whip antenna 18 of the wireless master station 19 to the beam antenna 12, propagated through the leaky coaxial cable 11 as a high frequency signal, and spatially radiated in each store. The radiated radio waves are received by the whip antennas 15a to 15c of the wireless slave stations 16a to 16c, and the POS terminals 14a to 14c can receive the data from the host computer 17.

The data of the POS terminals 14a to 14c is the whip antennas 15a to 1 of the wireless slave stations 16a to 16c.
5c is radiated to the exposed space of the leaky coaxial cable 11, propagated through the leaky coaxial cable 11 as a high frequency signal, and wirelessly transmitted from the beam antenna 12 to the whip antenna 18 of the wireless master station 19. As a result, the host computer 17 can receive the data from the POS terminals 14a to 14c.

Moreover, since the slit 20 for radiation is provided in the space exposed portion of the leaky coaxial cable 11, the whip antennas 15a to 15c of the wireless slave stations 16a to 16c are provided.
Even if the gain is set to 2.14 dB or less, a sufficient space propagation amount of electromagnetic waves between the leaky coaxial cable 11 and the wireless slave stations 16a to 16c is secured. Further, since the radiation slit 20 is provided only in the space exposed portion of the leaky coaxial cable 11, the transmission loss of the leaky coaxial cable 11 can be suppressed as much as possible.

The radio master station 19 and the leaky coaxial cable 11
Since the beam communication 12 having excellent directivity is used for wireless communication with the whip antenna 18 of the wireless master station 19.
Even if the gain is set to 2.14 dB or less, the space propagation amount of electromagnetic waves between the leaky coaxial cable 11 and the wireless master station 19 is sufficiently secured.

Since only one leaky coaxial cable 11 needs to be arranged in this way and the power distributor can be eliminated, even if the number of tenants increases, it can be easily dealt with and the economical efficiency can be improved. .. In addition, the leaky coaxial cable 11
The space propagation amount of electromagnetic waves between the wireless master station 19 and the wireless slave stations 16a to 16c is sufficiently secured, and the relay effect is sufficiently obtained.

[0023]

As described above in detail, according to the present invention, it is possible to provide a wireless communication device with excellent cost efficiency because only one cable is required to be wired and a power distributor can be eliminated. ..

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a partially enlarged view of the leaky coaxial cable in the embodiment.

FIG. 3 is a schematic configuration diagram showing a conventional example.

[Explanation of symbols]

11 ... Leaky coaxial cable, 12 ... Beam antenna, 15
a to 15c, 18 ... Whip antenna, 16a to 16c
... wireless slave station, 19 ... wireless master station.

Claims (1)

[Claims] 1. A leaky coaxial cable arranged in a plurality of spaces where it is difficult to propagate electromagnetic waves in space, an antenna connected to one end of the leaky coaxial cable, and a wireless communication path by space propagation of this antenna and electromagnetic waves. And a wireless slave station that is disposed in each of the spaces and that forms a wireless communication path by spatial propagation of electromagnetic waves and the leaky coaxial cable that is disposed in each of the spaces. Communication device.