JP2002152106A - Radio communication system using moving means - Google Patents

Abstract

PROBLEM TO BE SOLVED: To receive plural contents so as not to interfere adjacent radios while a user is located on a moving means when performing one-way or two-way radio communication between a portable wireless terminal, that the user on the moving means has, and a radio control means on the side of the moving means. SOLUTION: The frequency bands of radio waves from adjacent radio control means are made different and contents to be transmitted spatially or timewisely are switched so that a communication system conquers the problem.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a quasi-microwave band such as a 2.4 GHz band or a 5 GHz band or a microwave band (1 GHz).
(10 GHz to 10 GHz) for a wireless communication system that provides a two-way wireless communication service or a wireless information distribution service to a wireless mobile device using a broadband wireless communication at a station yard or in a department store. On the other hand, the present invention relates to a wireless communication system that provides a two-way wireless communication service or a wireless information distribution service to a user who uses a moving means such as an escalator, an elevator, and a moving passage.

[0002]

2. Description of the Related Art Wireless communication using a quasi-microwave band and a microwave band in an indoor environment, that is, a 2.4 GHz band and a 5G band
When broadband wireless communication using the quasi-microwave band such as the Hz band or the microwave band is used indoors or in the vicinity of a building, interference between communication waves and reflected waves called multipath fading causes deterioration of communication quality. Have a big impact. In particular, when an application is assumed in which the end moves constantly, such as a wireless mobile phone, the quality is significantly reduced. Such deterioration in quality due to multipath fading is particularly remarkable in an indoor environment such as a station yard or a department store. Such a place where an unspecified number of users come and go is originally a place where the information distribution service is most required. However, at present, it is difficult to stably provide sufficient high-speed communication due to the above-mentioned problem. Also, a wireless communication system using a moving path such as an escalator is known. As an example, JP-A-9-182135 is cited. In this method, an infrared communication unit is provided on each step or ceiling of the escalator, and information corresponding to the location of the user is delivered to the user of the escalator.

[0003]

However, in this prior art, users using the same escalator must receive the same information, and cannot distribute different information to the users. In addition, since the service is a broadcast service, a two-way communication service cannot be provided to the user. Furthermore, since infrared rays are used, unless the ends are oriented properly with respect to the infrared communication unit,
It is difficult to perform communication with sufficient accuracy.

Accordingly, an object of the present invention is to firstly provide a radio communication system capable of performing radio communication of different contents or two-way radio information distribution to a user riding on a means of transportation. It is. When the above wireless communication is performed, there are difficulties such as wireless interference of nearby users. Therefore, a second object of the present invention is to prevent radio waves from interfering between users.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a wireless communication system using a moving means according to the present invention comprises:
In a wireless communication system that performs two-way wireless communication or wireless information distribution to a wireless portable terminal using broadband wireless communication, a plurality of wireless communication devices are mounted on a floor of a moving means on which a user is placed and moved. And transmitting the transmission contents transmitted from the wireless communication device at appropriate time intervals for each of the wireless communication devices, and performing wireless communication or wireless information delivery to a wireless portable terminal of a user on the floor. As a wireless communication system using a moving means. As described above, according to the present invention, the plurality of wireless communication devices provided on the moving means switch the transmission contents transmitted from the wireless communication devices at appropriate time intervals for each of the wireless communication devices, so that the plurality of contents can be transmitted. Can be distributed at the same time. It is also possible to use different frequencies for adjacent wireless communication devices among the above wireless communication devices. In this case, interference between adjacent wireless communication devices is eliminated. Furthermore, if the wireless communication device is fixed and moves relative to the floor of the moving means, the movement of the moving means
The wireless portable terminal can receive different communication contents from different communication means, and there is no need to switch the transmission contents of the wireless means.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention. Here, FIG. 1 is a conceptual diagram showing an outline of a communication system in a moving path according to an embodiment of the present invention, and FIG. 2 is a conceptual diagram showing an outline when the present invention is used for an escalator according to an embodiment. .

FIG. 1 shows an outline of a wireless communication system according to an embodiment of the present invention. In this example, communication is performed between a wireless portable terminal of a user riding on a moving passage and communication means provided on the floor of the moving passage. A wireless control unit 3 as an example of a wireless communication unit is embedded in each moving floor 1 constituting the moving passage 10. The wireless control unit 3 comprises an antenna 30 and a modulation demodulator 31, performs wireless communication with a portable information terminal 51 of a user 50 on the moving floor 1, and transmits information received from the wireless communication base station 20 to a portable information terminal. 51. At this time, the adjacent wireless control units 3 can deliver different information. Further, when the portable information terminal 51 has a two-way communication function, the information from the portable information terminal 51 is received by the antenna 30, and the received information is transmitted to the wireless communication base station 20.

On the mobile path 10, the user 50 can move while standing still. In this case, the portable information terminal 51 of the user 50 and the wireless control unit 3
Since the relative positional relationship with is kept almost constant,
It is possible to perform stable high-speed communication even in an environment where the influence of multipath fading is large, such as indoors. The radio frequency used by each wireless control unit 3 for communication with the portable information terminal 51 is different from that of the adjacent wireless module, thereby preventing interference with the adjacent wireless module. In this embodiment, the wireless control unit 3 is mounted on the floor of the moving passage.
And the antenna 30 are fixed. Therefore, if the user does not move on the floor 1, the user cannot receive different communication contents. In order to solve this problem, in this embodiment, the communication content transmitted from the communication control unit is switched every moment. As a result, the user can receive another content one after another.

Assuming that each wireless module performs wireless communication only with the user directly above the floor panel in which the wireless module is embedded, it is appropriate to provide the antenna with directivity in the upward direction. Yes, and the output of the wireless module is weak enough. Under these conditions,
If the frequency is different even from the adjacent radio control units, radio interference between radio control units using the same frequency can be avoided, and one radio frequency can be used only by a user on one floor panel. Can be occupied. At this time, the upper limit of the number of persons who can share one floor 1 is determined by the size of the floor 1, so that the optimal radio frequency can be allocated to the number of persons and the frequency use efficiency can be improved. it can. The procedure for distributing information to the user 50 is as follows.

When the user 50 uses the escalator 10 and is on the floor 1, the portable information terminal 51 establishes communication with the wireless control unit 3 embedded in the floor panel 40 and uses the information. Information such as the user ID of the user 50
To the wireless communication base station 20 via the. Wireless base station 2
0, upon receiving the ID of the user 50, sends the distribution data customized for the user 50 to the portable information terminal 51 of the user 50 via the wireless control unit 3 according to the preset information. And send. When the wireless communication base station 20 is connected to an external network such as the Internet as in this example, World Wi-Fi is used.
It is also possible to use an Internet application such as deWeb or sending / receiving mail via the wireless communication base station 20.

If the portable information terminal 51 uses a terminal having a two-way communication function, the information of the user 50 is transmitted to the radio base station 20 and the user is notified to the user. It is also possible to deliver customized information.

[0012]

FIG. 2 shows an example in which the communication system of the present invention is implemented when the escalator 11 is used as a moving means. The wireless control unit 3 is embedded in each step 2 of the escalator. The configuration of the wireless control unit 3 is the same as that of FIG.
An antenna 30 and a modulation demodulator 31 are provided. The antenna 30 is a planar antenna, and the modulator / demodulator 31 is an IEEE 8
A 2.4 GHz band cotton-free module capable of wireless communication at 11 Mbps in accordance with 02.11b is used. User 5
0 has a two-way communication function, and the wireless communication base station 20 is connected to an external network. Such a wireless control unit 3 is installed in a place where the user stays for a certain period of time, such as a bus or a train, a seat under an elevator, a bus or a train, a floor surface, or a ceiling, in addition to the above-described moving passage and elevator. Wireless communication can be performed. In the example shown above, the wireless control unit 3 is fixed to the floor of the moving means. However, the wireless communication means can be fixed to the building that moves relatively to the moving means. In this case, since the wireless portable terminal 51 moves relative to the wireless control unit 3,
There is no need to switch communication contents transmitted from each wireless control unit 3. Even when the speed of the moving means is quite high, the transmission speed is high, so that transmission and reception of one communication content can be completed while passing through one communication area at a time.

[0013]

As described above, the present invention relates to a wireless communication system for performing bidirectional wireless communication or wireless information distribution to a wireless portable terminal using broadband wireless communication.
A plurality of wireless communication devices are provided on the floor of the moving means on which the user is mounted, and transmission contents transmitted from the wireless communication devices are switched at appropriate time intervals for each of the wireless communication devices, and the user is on the floor. It is configured as a wireless communication system using mobile means, which performs wireless communication or wireless information delivery to a wireless portable terminal of a user. As described above, according to the present invention, the plurality of wireless communication devices provided on the moving means switch the transmission contents transmitted from the wireless communication devices at appropriate time intervals for each of the wireless communication devices, so that the plurality of contents can be transmitted. Can be distributed at the same time. Also,
It is also possible to use different frequencies for adjacent wireless communication devices among the above wireless communication devices. In this case, interference between adjacent wireless communication devices is eliminated. Furthermore, if the wireless communication device is fixed and moves relative to the floor of the moving means, the movement of the moving means allows the wireless portable terminal to receive different communication contents from different communication means. Yes, there is no need to switch the transmission content of the wireless means.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an outline of a communication system in a moving path according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing an outline when the present invention is used in an escalator according to one embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Moving floor 2 ... Step 3 ... Wireless control part 30 ... Antenna 31 ... Modulator / demodulator 10 ... Moving path 20 ... Wireless communication base station 50 ... User 51 ... Wireless portable terminal

Claims (4)

[Claims] In a wireless communication system for performing two-way wireless communication or wireless information distribution to a wireless portable terminal using broadband wireless communication, a plurality of mobile devices are mounted on a floor of a moving means. Wireless communication device, switches communication contents with the wireless portable terminal in accordance with movement by the moving means, and performs wireless communication or wireless information distribution to a wireless portable terminal of a user on the floor. A wireless communication system using a moving means as a feature. 2. The wireless communication system according to claim 1, wherein frequencies used by adjacent wireless communication devices are different. 3. The wireless communication device is fixed to a floor, and transmission contents transmitted from the wireless communication device are switched for each wireless communication device at an appropriate time interval accompanying the movement by the moving means. 3. A wireless communication system using the moving means according to 2. 4. The wireless communication system according to claim 1, wherein the wireless communication device switches communication contents with respect to the wireless portable terminal by moving relative to the floor.