JP3021884U - Converter for PHS - Google Patents

Abstract

(57) [Summary] (Modified) [Problem] Personal Handy Phone
When the public service of the System (PHS) does not reach the room, the PHS terminal can be operated indoors. SOLUTION: A PHS conversion device 11 having a PHS signal transmission / reception function and a PHS terminal 2 facing indoors are transmitted / received in either a handset communication mode or a handset / master communication mode. To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a conversion device for expanding a service area by an inexpensive method and enabling a PHS terminal to operate indoors when a public service of a PHS (Personal Handy Phone System) system does not reach the room. To do.

[0002]

[Prior art]

 FIG. 3 is a diagram when a conventional PHS public terminal is operated indoors, where 1 is a base station that provides a public service of PHS, 2 is a PHS terminal, 3 is a building, etc., 4 is a window, 5 Is an approach route of the PHS signal to the building. Next, the operation will be described. In the conventional PHS service, the PHS signal from the base station 1 that performs the PHS public service is directly transmitted and received by the terminal 2, and when the terminal 2 enters the building 3 etc. It means that the PHS signal that enters into the building will be transmitted and received, and the PHS signal will not reach the inside of the building 3 etc. without fail.

[0003]

[Problems to be solved by the device]

 Since conventional PHS public services are mainly for outdoor services, it is difficult for them to reach the inside of buildings and the like, which hinders indoor calls. The present invention has been made to solve the above problems, and converts a PHS signal from a base station that provides public service of PHS into another PHS signal by a conversion device installed at a window or the like and transmits / receives it. By doing so, the strength of the PHS signal in the room is increased, and the operation of the PHS terminal in the room becomes possible.

[0004]

[Means for Solving the Problems]

 The invention according to claim 1 is characterized in that a PHS signal from a base station which provides a public service of PHS is converted into another PHS signal. The invention of claim 2 is characterized in that the device for converting the PHS signal comprises a common transceiver. The invention of claim 3 is characterized in that, when transmitting and receiving the PHS signal, the two antennas are switched, for example, in the direction of the base station and the direction of the room. The invention of claim 4 is characterized in that, when transmitting and receiving the PHS signal, the optimum one of the four antennas is selected for the arrival direction of the PHS signal. The invention of claim 5 functions as a terminal for a PHS signal from a base station that provides a public service of PHS, and enables inter-slave communication for a PHS terminal. Is.

[0005]

[Action]

 According to the first aspect of the present invention, the PHS signal from the base station that provides the PHS public service is converted into another PHS signal and transmitted indoors. According to the invention of claim 2, the PHS signal is converted into another PHS signal by the common transceiver. According to the third aspect of the present invention, for example, the antenna is switched between the outdoors and the indoors to prevent the radio wave from being excessively occupied. According to the invention of claim 4, the optimum antenna can be selected for the PHS signal from any of the four directions. According to the invention of claim 5, for example, it works as a public terminal of the PHS outdoors, and as a slave of the PHS indoors, enables inter-slave communication.

[0006]

【Example】

 An embodiment of this invention will be described below with reference to the drawings. In FIG. 1, 1 is a base station that provides public service of PHS, 2 is a terminal for PHS, 3 is a building, etc., 4 is a window, 5 is an entrance route of a PHS signal, 11 is a PHS converter, and 12 is a converter. It is a path of a PHS signal emitted from the device 11. Since the base station 2 that performs the PHS public service transmits and receives the PHS signal necessary for the public service, the PHS conversion device 11 facing it must have the PHS signal transmitting and receiving function required for the public service. On the other hand, the conversion device 11 and the PHS terminal 2 facing each other in the room can perform transmission / reception in either the inter-slave communication mode or the communication mode between the slave and the master. Therefore, the PHS converter 11 has a function of converting a PHS signal required for public service into a PHS signal in a communication mode between PHS slaves or between a slave and a master. The PHS signal from the base station 11 enters through the window 4 as in the path 5 and is radiated as in the path 12 to supply the terminal 2 with sufficient PHS signal. Since the present invention is configured as described above, there is an advantage that the PHS public service can be received indoors by a simple method.

FIG. 2 is a block diagram of the PHS converter 11 of the present invention, in which 21 is an antenna, 22 is an electronic switch, 23 is a transmitter, 24 is a receiver, and 25 is a conversion circuit. The transmitter 23 and the receiver 24 operate in a time division multiplex / time division simultaneous transmission / reception system. The PHS has four time slots, and the transmitter 23 and the receiver 24 operate alternately. First, when the PHS terminal 2 enters the room, the conversion device 11 identifies it in the communication between the slaves or in the communication mode between the slave and the master, and performs position registration with the base station 1 that provides public service. . This allows the PHS terminal 2 to make and receive calls. Here, when a call signal is issued from the PHS terminal 2, the receiver 24 of the conversion device 11 receives it in a certain time slot, and the transmitter 23 returns a response in the corresponding time slot. Further, the transmitter 23 issues a calling signal to the base station 11 in another time slot, and the receiver 24 receives a response signal from the base station 11 to establish a call. To cancel the call, the call release side sends a cancellation signal. When a call is made from the base station 11, the call is established in the reverse order of the above.

FIG. 3 shows another embodiment of the present invention, in which 31a and 31b are planar antennas such as patch antennas, and 32 is an electronic switch. For example, assuming that the antenna 31a faces the base station 11 and the antenna 31b faces the room, when the transmitter 23 and the receiver 24 transmit and receive to and from the base station 11, the antenna 32 is controlled by the electronic switch 32. When the transmitter 23 and the receiver 24 are connected to the terminal 31a and transmit / receive to / from the terminal 2 located indoors, the electronic switch 32 switches to the antenna 31b. If directional antennas are used for the antennas 31a and 31b, there is an effect that the radiation of the PHS signal can be limited to the required direction.

In the above description, the case where two antennas are used has been described, but it is possible to prepare four opposing antennas and perform diversity switching for switching between outdoor and indoor. Further, the effect is further enhanced by selecting and using an antenna in the most suitable direction for a four-way internal call.

[0010]

[Effect of device]

 According to the invention of claim 1, the PHS conversion device installed at the window or the like can convert the PHS signal from the base station that provides the public service of PHS into another PHS signal, so that the service area is expanded to the inside of the room. it can. According to the invention of claim 2, the PHS signal can be converted by the common transceiver. According to the invention of claim 3, since the antenna is switched between the outdoor and the indoor, the radiation of the PHS signal can be minimized. According to the invention of claim 4, the optimum antenna can be selected and used in the arrival direction of the PHS signal. According to the invention of claim 5, the system function of the PHS can be utilized to the maximum extent.

[Brief description of drawings]

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

FIG. 2 is a block diagram of a PHS converter of the present invention.

FIG. 3 is a block diagram showing another embodiment of the present invention.

FIG. 4 is a block diagram showing a conventional embodiment.

[Explanation of symbols]

1 PHS public service base station 2 PHS terminal 3 Building, etc. 4 Window 5 PHS signal entry path 11 PHS converter 12 PHS signal radiation path from converter 21 Antenna 22 Electronic switch 23 Transmitter 24 Reception Machine 25 conversion circuit 31a, 31b directional antenna 32 electronic switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04B 7/26 B

Claims (5)

[Scope of utility model registration request] 1. A means for transmitting and receiving a PHS signal to and from a base station which performs public service of PHS, and a P to face and indoors.
A PHS conversion device comprising means for transmitting and receiving an HS signal and means for converting the PHS signal. 2. A utility model registration characterized in that the means for transmitting and receiving the PHS signal comprises a common transceiver, and the individual time slots of the transceiver are allocated to the base station and the room facing each other. The PHS conversion device according to claim 1. 3. The PHS converter according to claim 1, wherein the transceiver has at least two antennas and switch means for switching the antennas. 4. The PHS converter according to claim 1, wherein the antenna is composed of four directional antennas facing each other. 5. A PHS signal to be transmitted corresponds to a public service terminal for the base station, and corresponds to a terminal or a master unit for indoor use. PHS according to claim 1 of new model registration
Converter