JPH01226226A - Mobile communication system - Google Patents

Abstract

PURPOSE:To call a mobile station even a calling side does not especially know a termination area by providing a means transmitting a self station signal inherent to the mobile station for the mobile station and a means detecting the self station signal of the mobile station for a basic station and registering the termination zone to a high-order station as the termination zone of the mobile station. CONSTITUTION:The mobile station generates start signals at the intervals of the prescribed time which has previously been decided. A its own station number generator 23 generates the inherent self station number in accordance with a clock being the output of a clock generator 21 by the input of the start signals. A mobile station number detection circuit 44 demodulates inputted base band signals and transmits demodulated mobile station number to a control part 43 when the self station number of the mobile station is included. The control part 43 registers an effect that the mobile station exists within the termination zone which the self station is in charge of to the high-order station. Consequently, a call station can execute a call processing only by the number of the mobile station even if it does not know the present termination zone of the mobile station.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mobile communication system, and particularly to a mobile communication system that is connected to a plurality of base stations, each in charge of a predetermined incoming call zone, and a plurality of base stations connected via a predetermined transmission path. A mobile communication system consisting of a higher-level station and a mobile station that moves within a space made up of a plurality of receiving zones, and in which a calling station and a mobile station perform communication using a predetermined method via the higher-level station and a base station. It is.

[Prior Art] Conventionally, in a wireless telephone system with a multi-zone configuration such as a car phone, the method for connecting calls to a mobile station is to divide the service area into several call receiving areas, and the caller side divides the service area into several call receiving areas. A region designation system was used to designate one of the following areas.

[Problems to be Solved by the Invention] However, in the past, when receiving a call to a mobile station, the area number must be specified by the calling party, so the caller did not know the location of the mobile station in advance. Must not be.

Particularly in the case of extremely small zone wireless telephone systems where mobile stations frequently move between multiple receiving areas, the caller may not be able to easily identify the receiving area and may not be able to establish a connection. .

An object of the present invention is to solve the above-mentioned problems and provide a mobile communication system that allows the calling side to make a call to a mobile station without knowing the receiving area.

[Means for Solving the Problems] In order to solve the above problems, in the present invention, a plurality of base stations respectively in charge of predetermined JLIL & incoming call zones, and a plurality of base stations and a predetermined transmission path are provided. A mobile communication system consisting of a connected upper station and a mobile station moving in a space made up of a plurality of incoming call zones, in which a calling station and the mobile station communicate in a predetermined manner via the upper station and base station. The mobile station is provided with means for transmitting a own signal unique to the mobile station, and the base station is provided with means for detecting the own signal of the mobile station from a received signal, When a station signal is detected, a configuration is adopted in which the incoming call zone is registered in the upper station as the incoming call zone of the mobile station.

[Operation] According to the above configuration, by detecting the own signal transmitted from the mobile station at the base station, it is possible to identify that the mobile station exists within the incoming call zone that the base station is in charge of.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 shows the configuration of a mobile station. Number 1 in the figure
1 is an antenna, and 12 is a wireless communication unit that converts a reception frequency signal received by the antenna 11 into a reception baseband signal, and also converts a transmission baseband signal into a transmission frequency signal, and uses a predetermined communication method such as a spread spectrum method. has.

Communication operations of the device are controlled by a control section 13. A local signal generation section 14 is connected to the control section 13 . The own station signal generating section 14 generates a own station signal as an identification signal unique to this mobile station.

In this embodiment, the receiving area where the mobile station is located is identified by transmitting this local station signal to the fixed station.

Further, an audio circuit 15 is connected to the control unit 13, and the audio circuit 15 has a speaker 15a and a microphone 1.
5b is connected, and voice communication is performed via the voice circuit 15 in this embodiment.

FIG. 2 shows the configuration of the own station signal generating section 14 shown in FIG. 1. In FIG. 2, reference numeral 21 is a clock generator that generates a clock to be supplied to each part of the entire own station signal generator. A start signal is generated at each time interval.

Reference numeral 23 denotes a local station number generator, which is composed of a memory, an oscillator, etc., and generates a local station number in a predetermined format in accordance with a clock supplied from the clock generator 21 when receiving a start signal from the timer 22. The own station number is generated as a digital signal using a character code. At this time, the own station number is transmitted together with a predetermined code that can be distinguished from other communication data at the base station. A code for error correction may be added to the own number before transmission.

The own station number output from the own station number generator 23 is input to the modulator 24, converted into a baseband signal suitable for the transmission path, and given to the control section 13.

On the other hand, the configuration of the base station is shown in FIG. In FIG. 3, reference numeral 41 is an antenna; reference numeral 42 converts a reception frequency signal received by the antenna 41 into a reception baseband signal;
It is also a wireless communication unit that converts a transmission baseband signal into a transmission frequency signal, and has a communication method corresponding to the wireless communication unit 12 of the mobile station.

The operation of the entire base station is controlled by a control section 43.

A mobile station number detection circuit 44 is connected to the control section 43 .

The mobile station number detection circuit 44 detects the own station signal from each mobile station from the received baseband signal sent from the wireless communication unit 42 via the control unit 43, demodulates the mobile station number of the mobile station, and demodulates the mobile station number of the mobile station. It is output to the control section 43. Mobile station number detection circuit 4
4 detects a predetermined identification code for identifying the own station number, and inputs the own station number of the mobile station transmitted together with the code to the control section 43.

Reference numeral 45 is a line interface that connects the transmitting/receiving baseband signal and a line (for example, a telephone line) 45a.

Next, the operation of the above configuration will be explained.

In the mobile station, the timer 22 generates an activation signal at predetermined constant time intervals according to the clock supplied from the clock generator 21.

This activation signal is sent to the control unit 13, and the control unit 13 activates the transmission stage of the wireless communication unit 12 except when the mobile station is on a call, and inputs the input of the transmission stage to the local station signal generation unit 14. Connect to the output of modulator 24.

On the other hand, the activation signal output from the timer 22 is also input to the own station number generator 23. The own station number generator 23 generates a unique own station number in accordance with the clock output from the clock generator 21 upon input of the activation signal.

The data of the own station number is modulated by a predetermined modulation method by the modulator 24 and input to the control section 13 .

The modulated own station number data input to the wireless communication unit 12 via the control unit 13 is converted into a transmission frequency signal,
It is fired into the air from the antenna 12.

On the other hand, at the base station, the own station number of the mobile station received by the antenna 41 is converted into a baseband signal received by the wireless communication unit 42, and sent to the mobile station number detection circuit 4 via the control unit 43.
4 is input.

The mobile station number detection circuit 44 demodulates the input baseband signal and sends the demodulated mobile station number to the control unit 43 when the mobile station's own signal is included.

The control unit 43 sends the received mobile station number inputted from the mobile station number detection circuit 44 to the upper station via the line interface and the line to register that the mobile station exists within the incoming call zone that the control unit is in charge of. Let's do it.

The above series of operations is repeated at the time interval preset in the timer 22, so by setting the time interval appropriately, when the mobile station is within the service area, except immediately after moving between zones, The upper station can identify the zone in which the mobile station exists.

Therefore, when a higher-level station (not shown) receives a call to a certain mobile station, the incoming zone can be determined through the registration process from the base station via the line 45a, and the calling station and the mobile station are connected via the corresponding base station. can be connected.

Therefore, the calling station can process a call using only the mobile station number without knowing the current receiving zone of the mobile station.

The own station signal generating section 14 can also be configured as shown in FIG.

In FIG. 4, reference numeral 31 is a clock generator that generates a clock to be supplied to each part of the entire local signal generator.
The clock generated thereby is supplied to the timer 33 and the random number generator 32.

The random number generator 32 generates random numbers within a predetermined range according to the clock from the clock generator 31, and outputs them to the timer 33. The timer 33 generates random numbers within a predetermined range according to the clock supplied from the clock generator 31. A starting signal is output to the own station signal generator 34 at every interval.

The own station signal generator 34 is a second own station number generator that generates the own station number according to the clock supplied from the clock generator 31 when the activation signal is input from the timer 33.
The configuration is almost the same as the local signal generator 23 shown in the figure.

Modulator 35 is a modulator similar to modulator 24 of FIG.

In the above configuration, the operation of transmitting the own station number after the activation signal is generated from the timer 33 is the same as in the above embodiment, but the time interval at which the activation signal is generated from the timer 33 is the output of the random number generator 32. The difference is that it is determined by

That is, in this embodiment, the time interval at which the own station number is transmitted is determined by the random number generator 32 and is not constant.

If a plurality of mobile stations exist in the same zone and happen to transmit their own numbers at the same time, a situation will arise in which the base station will be unable to identify the mobile station number due to signal collision.

At this time, if the transmission interval of the own station signals is constant as in the embodiment shown in FIG. However, in this embodiment, the transmission timing of the mobile station's own number is determined according to random number generation, which significantly reduces the possibility of the own number colliding with multiple mobile stations. , it is possible to reliably register the mobile station in the incoming call zone.

Although the case where voice communication is performed between a mobile station and a base station has been described above, it goes without saying that a similar configuration can be implemented when transmitting other transmission/reception data such as data communication.

[Effects of the Invention] As is clear from the above, according to the present invention, a plurality of base stations, each in charge of a predetermined incoming call zone, and an upper station connected to the plurality of base stations via a predetermined transmission path, , in a mobile communication system consisting of a mobile station moving in a space constituted by a plurality of incoming call zones, in which a calling station and the mobile station communicate in a predetermined manner via the upper station and the base station. When the base station is provided with means for transmitting a own signal unique to the mobile station and means for detecting the own signal of the mobile station from a received signal, and the base station detects the own signal of the mobile station. , the incoming learn is registered in the upper station as the incoming call zone of the mobile station, so by detecting the own signal transmitted from the mobile station at the base station, the mobile station can Since it is possible to identify that the station is within the incoming call zone that the station is in charge of and register this fact with the higher-level station, the calling station can make a call using only the mobile station number without knowing the current incoming call zone of the mobile station. It has the excellent effect of being able to

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a mobile station in a mobile communication system adopting the present invention, FIG. 2 is a block diagram showing the configuration of the own station signal generator in FIG. FIG. 4 is a block diagram showing the configuration of the station. FIG. 4 is a block diagram showing different configurations of the local station signal generator. 11.41... Antenna 12.42... Wireless communication section 13.43... Control section 14... Own station signal generation section 15... Audio circuit 21
．． 31...Clock generator 22.33...Timer 23.3-@=... Own station number generator 24...Modulator 32...Random number generator 4
4...Mobile station number detection circuit

Claims (1)

[Claims] 1) A mobile station that moves within a space consisting of multiple base stations, each in charge of a predetermined incoming call zone, an upper station connected to the multiple base stations via a predetermined transmission path, and multiple incoming call zones. In a mobile communication system in which a calling station and a mobile station communicate in a predetermined manner via the upper station and the base station, means for transmitting a own station signal unique to the mobile station to the mobile station; The base station is provided with a means for detecting the own signal of the mobile station from the received signal, and when the base station detects the own signal of the mobile station, the reception zone is determined as the reception zone of the mobile station and sent to the upper station. A mobile communication system characterized by registration.