JPH04123631U - wireless system - Google Patents

Abstract

(57) [Summary] [Purpose] A wireless system is capable of performing wireless communication over a wide range with a single system consisting of a base station and a mobile station with low transmission power. [Configuration] Receives a radio signal (each mobile station has a different frequency) from a mobile station (A or B, or C, D or E) belonging to its own transmission area (1a or 2a) and transmits it to a predetermined mobile station. A plurality of base stations 1 and 2 are provided, and each base station converts the signal into a station frequency signal (F wave) and transmits it wirelessly to all mobile stations belonging to its transmission area. A base station area relay means is provided that converts a radio signal received from a mobile station into a signal of a predetermined base station frequency (M wave or N wave) for each base station and wirelessly transmits it to other base stations. At the same time, the base station frequency signal (N wave or M wave) wirelessly transmitted from the base station area relay means of the other base station is received and converted into the mobile station frequency signal (F wave). , a mobile station area relay means for wirelessly transmitting to all mobile stations belonging to its own transmission area is provided.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a wireless system for wireless communication between multiple mobile stations.

0002

[Conventional technology]

When multiple workers located far from each other work together, It is possible for workers to communicate with each other, and even follow instructions from one worker. It would be extremely convenient if information could be communicated to all other workers at the same time. For this reason, The above-mentioned work requires multiple mobile stations carried by each worker and one base station. Therefore, each mobile station can transmit radio signals of different frequencies to the base station, A base station receives a radio signal transmitted from one of these mobile stations and transmits a predetermined signal. By converting it into a signal at the mobile station frequency and transmitting it wirelessly to all mobile stations. , wireless systems that enable so-called group calls were often used.

0003

[Problem that the idea aims to solve]

However, in such wireless systems, conventionally there was only one base station. Therefore, the communication range of one wireless system is the transmission area (transmission area) of that base station. (determined by the signal output). Therefore, no license is required to use it. When using a system consisting of low-power base stations and mobile stations, the communication range is They were often small and inconvenient to work in.

0004 This invention was developed in view of these circumstances, and is suitable for bases with low transmission output. A single system consisting of stations and mobile stations can perform wireless communication over a wide range. The purpose is to provide a wireless system that allows

[0005]

[Means to solve the problem]

In order to achieve the above purpose, the wireless system of the present invention Receives radio signals (each mobile station has a different frequency) from the mobile station it belongs to. Converts the signal to a predetermined mobile station frequency and transmits it to all mobile stations belonging to that transmission area. There are multiple base stations that transmit wirelessly to each other, and each base station has its own transmission area. converts radio signals received from mobile stations within the base station into signals of a predetermined base station frequency for each base station. A base station area relay means is provided for converting and wirelessly transmitting to other base stations. At the same time, the correspondence transmitted wirelessly from the base station area relay means of the other base stations mentioned above is Receives the base station frequency signal, converts it to the above mobile station frequency signal, and transmits it An area relay means for mobile stations that transmits wirelessly to all mobile stations belonging to the area. It is set up and configured.

[0006]

[Effect]

In such wireless systems, the base station is connected via one base station as in the past. Not only can group calls be made between mobile stations within the transmission area of Wireless communication between base stations using area relay means and area relay means for mobile stations enables group calls over a wide range, including mobile stations in different transmission areas. becomes.

[0007]

【Example】

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, In this embodiment, the work is performed by multiple workers located apart from each other. A case in which the wireless system according to the present invention is used will be described below. As shown in FIG. 1, the wireless system 10 includes five mobile stations (first mobile station A, second mobile station B, ..., fifth mobile station E), and two base stations (first base station 1, second base station It consists of station 2). Each mobile station (A to E) is carried by each worker (only the head of each is shown). , radio signals of different frequencies carrying the voices of each worker (radio signals of the first mobile station A) The signal will be referred to as A wave, and the radio signal of the second mobile station B will be referred to as B wave. ). The first base station 1 has its own transmission area (first transmission area 1a) indicated by a chain line in the figure. This system receives wave A or wave B from first mobile station A or second mobile station B belonging to A signal with a frequency that is uniformly set as the mobile station frequency for the entire system (hereinafter referred to as F wave) ) and transmit it wirelessly to both mobile stations A and B belonging to the first transmission area 1a. . In addition, the second base station 2 also has a base station that belongs to its own transmission area (second transmission area 2a). Receives C waves, D waves, or E waves from the third mobile station C, the fourth mobile station D, or the fifth mobile station E. , for all mobile stations C, D, and E belonging to the second transmission area 2a by converting it into the above F wave. Transmit wirelessly. Therefore, the first mobile station A and the second mobile station B belonging to the first transmission area 1a are Mutual wireless communication is possible via base station 1 (however, within the first transmission area 1a If the number of mobile stations in The third mobile station C to the fifth mobile station E belonging to the In other words, the voice of one or more workers can be heard from all tasks including that worker. You can make calls using the method transmitted to other parties. Note that both base stations 1 and 2 are installed within the transmission area (2a, 1a) of the other party. has been done.

[0008] Here, the transmission areas 1a and 2a of each base station 1 and 2 are the transmission areas 1a and 2a of each base station. This is determined by the output, but in this system 10 each worker can handle the work even if he or she is not licensed. The transmission output of each mobile station (A to E) and base stations 1 and 2 is kept low so that is being given. Therefore, each transmission area 1a, 2a is narrow (for example, radius 20 (about 30 meters), the communication distance is short if left as is. Therefore, each base station 1 and 2 is equipped with an area relay circuit for base stations, as shown in FIG. 11 and 21, and area relay circuits 12 and 22 for mobile stations are provided. Area relay circuits 11 and 21 for each base station are connected to each transmitting and receiving antenna section (transmitting and receiving antenna section). 13 and 23 (including antenna, transmitter/receiver switch, etc.), and connect to own base station side. Radio signal (A wave to E wave) of any mobile station belonging to the transmission area (1a, 2a) is received, and the signal of the base station frequency set for each base station 1 and 2 (hereinafter referred to as the first The signal from base station 1 is called M wave, and the signal from second base station 2 is called N wave), and the above Radio transmission to other base stations 2 and 1 through transmitting and receiving antenna units 13 and 23, respectively. believe The area relay circuits 12 and 22 for each mobile station are connected to each transmitting and receiving antenna section 13 and 23. connected, receives the N waves and M waves wirelessly transmitted from the other base stations 2 and 1, and then It is converted into the above-mentioned F wave and transmitted to its own base station through the above-mentioned transmitting/receiving antenna sections 13 and 23. Radio transmission is performed to all mobile stations belonging to the transmission area (1a, 2a).

[0009] In this system 10 using the base stations 1 and 2 configured as described above, for example, the first When a wave A is transmitted from the first mobile station A in the transmission area 1a, the wave A is first transmitted to the first mobile station A. It is received by the base station area relay circuit 11 of one base station 1 and converted into an M wave. and is transmitted to the second base station 2. On the other hand, the above A wave is inside the first base station 1. The signal is converted into an F-wave at the section and transmitted to mobile stations A and B within the first transmission area 1a. Also , the M wave is received by the mobile station area relay circuit 22 of the second base station 2. Both are converted into F waves and transmitted to mobile stations C, D, and E within the second transmission area 2a. In this way, even if the transmission power of each base station and each mobile station is low, the transmission power of different base stations can be Group calls can be made over a wide range, including mobile stations belonging to the communication area.

0010 Note that in this example, the wireless system was configured using two base stations; The proposed wireless system is not limited to this, but may use three or more base stations, and By installing compatible base stations within each other's transmission area, system The transmission area of the entire system can be expanded in a chain, enabling long-distance wireless calls. becomes. In addition, in this case, the first base station (which transmits M waves) and the second base station (which transmits N waves) If you arrange the base stations alternately with those that transmit can be placed.

[0011]

[Effect of the idea]

As described above, if the wireless system of the present invention is used, each base station can communicate with other base stations. Radio signals transmitted from mobile stations within the transmission area of (neighboring) base stations are Can be received via wireless communication from other base stations, and can also receive its own transmission error. Since the transmission power of each base station and mobile station is Even if it is small, it can be used over a wide range including mobile stations belonging to the transmission area of all base stations. You can make so-called group calls.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram of a wireless system according to the present invention.

FIG. 2 is a block section of a base station in the wireless system.

[Explanation of symbols]

1,2 Base station 1a, 2a Transmission area A, B, C, D, E Mobile station 11, 21 Area relay circuit for base stations 12, 22 Area relay circuit for mobile stations

Claims (1)

[Scope of utility model registration request] Claim 1: Consisting of a plurality of mobile stations that transmit radio signals of different frequencies and a plurality of base stations, each of these base stations receives the radio signals from the mobile stations belonging to its own transmission area. The wireless system is configured to convert the signal into a signal of a predetermined mobile station frequency and wirelessly transmit the signal to all the mobile stations belonging to the transmission area, and each base station has the received wireless signal. base station area relay means for converting a signal into a signal of a predetermined base station frequency for each base station and wirelessly transmitting the signal to another base station; mobile station area relay means for receiving a signal at the station frequency, converting it into a signal at the mobile station frequency, and wirelessly transmitting the signal to all the mobile stations belonging to its own transmission area; Characteristic wireless system.