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Communication system

A communication system and wireless communication technology, applied in the field of communication systems, can solve the problems of limited communication range, weak radio waves, easy to be interfered by crosstalk, etc., and achieve the effect of light weight

Inactive Publication Date: 2007-11-07
COCOMO MB COMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the extremely weak radio waves used in existing wireless communication equipment, the communication distance is about 30m, which is not ideal, and it is prone to crosstalk interference.
[0005] In addition, in the existing wireless communication devices, although the radio waves used are extremely weak, since the radio waves (electromagnetic signals) in the wireless communication space leak to the outside, they can become interference radio waves to other wireless communication devices, and the communication range is greatly restricted. restrictions, its use is very limited, and the above advantages may not be maximized
[0006] In addition, in general, compared with the existing wired communication, the wireless communication space can be realized cheaply and easily, but there are problems such as interruption of communication due to people and obstacles, and slow communication speed.
In addition, the radio waves generated by wireless communication have a straight-forward nature, and there is a shortcoming that the communication is blocked when the communication is blocked by people and objects between the transmitter and the receiver.
In addition, because the attenuation of radio waves is inversely proportional to the square of the distance, it is the current situation that the range where wireless communication can be performed is limited

Method used

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Embodiment 1

[0066] In this embodiment, an example of changing the connection of the transceiver 106, the excitation device 107, and the signal line 108 in the communication system described in the above-mentioned embodiments (FIG. 1 and FIG. 4) will be described. In addition, in this embodiment, the same components as those described in the above-mentioned embodiment ( FIGS. 1 to 4 ) are denoted by the same reference numerals, and no further description is given here.

[0067] Refer to Figure 5. FIG. 5 shows a schematic configuration diagram of the communication system of this embodiment. As shown in FIG. 5 , in this embodiment, the signal line 108 connected to the excitation device 107 is directly connected to the metal part of the train 102 . The excitation device 107 excites the conductors in the train 102 via the signal line 108 based on the information signal supplied from the transceiver 106 . Then, via the wheels 102a, 102b, 102c and 102d and the rails 103 and 104 electrically co...

Embodiment 2

[0075] In this embodiment, an example in which an antenna is used instead of the excitation devices provided in the train 100, the train 101, and the train 102 in the communication system described in the above-mentioned embodiments (FIG. 1 and FIG. 4) will be described. In addition, in this embodiment, the same components as those described in the above-mentioned embodiment ( FIGS. 1 to 4 ) are denoted by the same reference numerals, and no further description is given here.

[0076] Referring now to FIG. 7 . FIG. 7 shows a representation of the communication system according to the invention as viewed from the side. In addition, in FIG. 7, the internal diagram of these trains 100, 101, and 102 is shown for convenience of description.

[0077] Trains 100, 101, and 102 have transceivers 100e and 100h, transceivers 101e and 101h, and transceivers 102e and 102h, respectively. Transceivers 100e and 100h installed inside the train 100 are connected to antennas 100k and 100i, res...

Embodiment 3

[0092] In this embodiment, the communication system among the train 100, the train 101, and the train 102 will be described. In addition, in this embodiment, the same reference numerals are assigned to the same components as those described in the above-mentioned embodiment ( FIGS. 1 to 4 ), and no further description will be given here.

[0093] Referring now to FIG. 9 . FIG. 9 shows a schematic configuration diagram of the communication system of this embodiment. The communication system of this embodiment is not a device that communicates between a transceiver outside the train and a transceiver installed inside the train like the communication system described in the above-mentioned embodiments (FIG. 1 to FIG. 4), but A device that performs communication between a plurality of transceivers installed inside a train.

[0094] As shown in FIG. 9 , in the communication system of this embodiment, an excitation device 102m is provided below the train 102 . The same symbols ar...

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Abstract

To provide a communication system that, in communication within a moving unit, such as a train, ship, vehicle, airplane or the like, uses very weak radio waves, while achieving a reduction of communication equipments and preventing the radio waves from leaking out of the radio communication space. There is provided a communication system that comprises a mobile unit; a first transmitting / receiving apparatus; a first exciting apparatus that is connected to the first transmitting / receiving apparatus, excites, based on a first signal received from the first transmitting / receiving apparatus, a conductor in the mobile unit, and transmits a second signal received from the conductor in the mobile unit to the first transmitting / receiving apparatus; a second transmitting / receiving apparatus disposed in the mobile unit; and a second exciting apparatus that is connected to the second transmitting / receiving apparatus, excites, based on the second signal received from the second transmitting / receiving apparatus, the conductor in the mobile unit, and transmits the first signal received from the conductor in the mobile unit to the second transmitting / receiving apparatus.

Description

technical field [0001] The present invention relates to a communication system using weak radio waves. In particular, it relates to communication systems in mobile bodies such as trains, ships, and airplanes, communication systems between mobile bodies, and communication systems between mobile bodies and fixed stations. Background technique [0002] In a modern society where information networks are highly constructed, information and communication technologies are necessary and indispensable. In particular, the range in which wireless communication is used is expanding due to the development of wireless communication technology in recent years. In wireless communication, there are not only high-power communication such as aviation wireless, ship wireless, and amateur wireless communication, but also relatively low-power communication such as mobile phone communication, wireless transceiver communication, and wireless LAN communication. [0003] Even in low-power communica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B5/02H04B7/26H04B5/48
CPCH04B7/15
Inventor 萩原善弘胜山力佐久间雄一清水煌策渡边文泰萩原一平大泽修
Owner COCOMO MB COMM INC