JPH01194724A - Mobile communication equipment - Google Patents

Abstract

PURPOSE:To efficiently perform the registration of a mobile station by detecting the position of its own vehicle on which the mobile station is loaded, and selecting a base station as a communication base station by issuing the position registration signal of its own vehicle to the base station. CONSTITUTION:The transmission/reception of a signal in an automobile telephone terminal 18 is controlled by a control circuit 175, and the position registration signal is sent to a nearest automobile telephone base station 2 via a modem 174. Then, vehicle position information is received from a navigation ECU, and the nearest base station where the vehicle exists in a radio zone out of plural base stations stored in a memory in advance in the control circuit 175 is decided. And in case of changing the nearest base station as a result of decision, a position registration deletion signal is issued to the base station on which the position is registered at present. Also, the position registration signal is issued to a changed new nearest base station, and hereafter, communication is performed between the new base station.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile communication device, and more particularly to a mobile communication device suitable for use in a car telephone or the like.

[Prior Art] A car phone is a mobile phone equipped with a telephone radio set in a car, which communicates with the nearest base station and connects to a public telephone line. The wireless zone of a base station is usually circular, 5 to 10 km in size, so in order to cover a relatively wide service area, a large number of base stations are installed so that their wireless zones overlap at the periphery, making it difficult to receive telephone calls. The problem is which base station to communicate with at the time of incoming and outgoing calls.

Conventionally, a response signal to a call or an outgoing call signal during a call is received at each of the above base stations, the mobile station is registered with the base station with the highest reception level, and communication is performed with that base station. ing.

[Problems to be Solved by the Invention] Such conventional car telephones require a complex system in which a central radio network control station compares the reception levels and selects a base station in order to register a mobile station. There are (for example, Japanese Patent Application Laid-Open No. 62-128227),
During this time when all base stations use the same channel at the same time, the channel is completely blocked, resulting in poor communication efficiency.Furthermore, there is a problem in that it takes time to switch between base stations during communication, that is, to change registration. .

The present invention solves this problem, and aims to provide a mobile communication device that can register a mobile station efficiently and in a short time using a simple system.

[Means for Solving the Problems] To explain the configuration of the present invention using FIG. 1, the mobile communication device has the following features:
Vehicle position detection means for detecting the position of a vehicle equipped with a mobile station that communicates with a base station; storage means for storing the position of the base station in advance; and a location registration means for transmitting a location registration signal to the base station when it is confirmed that the location registration signal is confirmed.

[Operation] When the vehicle position detecting means detects the position of the own vehicle equipped with the mobile station and confirms that it is within the wireless zone of the base station stored in advance, the position registration means transmits the own vehicle's position registration signal as described above. The base station is selected as a communication base station.

In this way, the mobile station selects and determines the nearest base station with which to communicate.

[Embodiment] In FIG. 2, a moving vehicle 1 is provided with a car telephone radio 17 and a car telephone terminal 18, the details of which will be described later. This is carried out wirelessly between the antennas 21 of .

A navigation ECUII constituting vehicle position detection means is connected to the radio 17, and the EC011 receives outputs obtained from a geomagnetic sensor 12, a vehicle speed sensor 13, a rate sensor 14, and a global positioning system (GPS) receiver 15. A signal is input, the vehicle position is detected by a known procedure, and this is displayed on the display 16, and vehicle position information is sent to the radio device 17.

The configuration of the car telephone radio 17 is shown in FIG.

The radio device 17 has a transmitting circuit 171 and a receiving circuit 172,
These exchange communications with the base station 2 via the antenna duplexer 173. The car telephone terminal 18 is connected to the transmitting circuit 171 and the receiving circuit 172, and the timing of signal transmission and reception between them is controlled by a control circuit 175.

A modem 174 is provided, which sends a location registration signal (described later) to the nearest mobile telephone base station 2 in response to a command from a control circuit 175.
Send to.

The location registration operation by the control circuit 175 will be explained with reference to FIG. In step 101, the navigation ECU1
1 receives the vehicle position information, and determines the nearest base station where the vehicle is located within the wireless zone among the plurality of base stations whose positions are stored in advance in the memory in the control circuit 175 (step 102> .

As a result of the above determination, if the nearest base station is changed (step 103), a location registration cancellation signal is issued to the base station currently registering its location on its designated control channel (step 104).

This signal includes data indicating the base station to change to.

Thereafter, a location registration signal is sent to the new nearest base station via the designated control channel (step 105), and communication is thereafter performed with the new base station.

The position registration and agitation cancellation signals are sent to the modem 174.
It is done through.

Effects of the Invention] According to the communication device of the present invention, the nearest base station is selected on the mobile station side, so there is no need for the conventional complicated system in which the reception level of each base station is determined by the line control station. It is.

Furthermore, since there is no problem that the same channel of each base station is used at the same time when a mobile station is registered, efficient communication is possible.

Furthermore, registration changes can be made in an extremely short time simply by sending a registration signal from the mobile station to the selected base station.

[Brief explanation of the drawing]

FIG. 1 is a complaint correspondence diagram, FIG. 2 is a block diagram of the overall configuration of the communication device, FIG. 3 is a block diagram of the overall configuration of the car telephone radio, and FIG. 4 is an operation flowchart of the control circuit. 1... Vehicle 11... Navigation ECU (vehicle position detection means) 17... Car telephone radio (mobile station) 175... Control circuit (storage means, position registration means) 2... Base station No. Figure 1 Figure 4

Claims (1)

[Claims] Vehicle position detection means for detecting the position of a vehicle equipped with a mobile station that communicates with a base station; storage means for storing the position of the base station in advance; and a location registration means for transmitting a location registration signal to the base station.