JPH05219563A - Mobile equipment for mobile communication system - Google Patents

Abstract

PURPOSE:To suppress the reduction of communication quality and system throughput. CONSTITUTION:When the running speed information of an MBL 11 detected by an SDT 13 is transmitted through an MSI 14 to a CTL 7 as electric signals, an INF 10 receives this information, and an SPP 9 processes the running speed information to be changed with the passage of time and calculates the average moving speed of the MBL 11. A PWC 8 generates data for selecting the class of cells according to whether this average moving speed is higher or lower than a certain threshold value, and these data are transmitted from a TRX 3. Corresponding to the selected cell class, the PWC 8 controls the output power of a TX 5 within a specified range. Therefore, since service is executed while selecting macro-cells or micro-cells corresponding to the moving speed of a moving body, hand-over is not frequently generated in a short time and as the result, the reduction of communication quality and system throughput can be suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile unit of a mobile communication system, and more particularly to a mobile unit of a mobile communication system that receives a service in a service area covered by a dual cell of a micro cell and a macro cell.

[0002]

2. Description of the Related Art A conventional mobile device of a mobile communication system will be described with reference to the drawings. FIG. 2 is a block diagram showing an example of a mobile device of a conventional mobile communication system.

A mobile unit (hereinafter referred to as MSS) 21 of this conventional example transmits / receives control signal data and communication data to / from a base station (not shown) via an antenna (hereinafter referred to as ANT) 2 and a transceiver unit (hereinafter referred to as TRX). 3 and a control unit (hereinafter, CTL) 27 that controls the operation. The TRX 3 is composed of a transmitter (hereinafter TX) 5, a receiver (hereinafter RX) 6 and a coupling unit (hereinafter JNT) 4 and has a CTL 27.
Is a power control unit (hereinafter referred to as PW) that controls the output power of the TX5 to increase or decrease within a specified range according to an instruction from the base station.
C) has 8. The cell and the channel are assigned to the MSS 21 by processing the electric field strength data of the radio wave related to the transmitter output power class data transmitted from the MSS 21 on the base station side.

[0004]

The mobile unit of this conventional mobile communication system does not have the moving speed information of the mobile unit, and therefore, the cell whose mobile unit is to be controlled according to the moving speed of the mobile unit. Since there is no control to select the type,
When a mobile device receives a service in a service area covered by a dual cell of a micro cell and a macro cell, the optimum cell may not be selected according to the moving speed, and the mobile device is moving at a comparatively high speed. Sometimes, when the service is performed by the micro cell, handover frequently occurs in a short time, which causes a decrease in call quality and a decrease in system processing capability.

[0005]

A mobile unit of a mobile communication system according to the present invention receives traveling speed information of a moving body of the mobile communication system, and based on the traveling speed information which fluctuates with time, an average movement of the moving body. Speed processing means for obtaining a speed, transmission means for generating data for selecting a cell type in which the moving body should be controlled according to the average moving speed and transmitting the data to the base station side, and transmission according to the cell type And a power control means for controlling the output power of the machine.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a mobile device of the mobile communication system of the present invention.

As shown in FIG. 1, in the mobile communication system of the present embodiment, the MSS1 mounted on the mobile unit (hereinafter referred to as MBL) 11 communicates with the base station (not shown) via the ANT2 and communicates with the control data. TRX3 that sends and receives data
And the CTL 7 that controls the operation in the MSS 1.
The TRX3 has the same configuration and function as the conventional TRX3 shown in FIG. The CTL 7 is an interface (hereinafter referred to as INF) 10 for receiving the traveling speed information of the MBL 11, a speed processing unit (hereinafter referred to as SPP) 9 for obtaining an average traveling speed from the traveling speed information, and a cell to which the MBL 11 should be serviced according to the average traveling speed. A power control unit (hereinafter referred to as PWC) 8 that generates type selection data and controls the transmission output of the TX 5 according to the cell type.

On the other hand, the MBL 11 monitors the state of the drive unit (hereinafter referred to as DRV) 12 for driving and the state of the DRV 12 and MB
Speed detection unit (hereinafter SDT) that detects the traveling speed of L11
13 and a mobile interface (hereinafter referred to as MSI) 14 for transmitting the traveling speed information of the MBL 11 detected by the SDT 13 to the MSS 1. Where MSS1
Is mounted on the MBL11, the traveling speed of the MBL11 is equal to the moving speed of the MSS1.

Next, the operation of this embodiment will be described.
The traveling speed information of MBL11 detected by SDT13 is M
CT as an electric signal (or weak radio wave) via SI14
When transmitted to L7, INF10 receives this and SPP
9 processes the traveling speed information which fluctuates with time, MBL11
Calculate the average moving speed of. The PWC 8 generates data for selecting the cell type in which the MBL 11 should receive the service according to the average moving speed. That is, data for selecting a cell type (macro cell or micro cell) is generated depending on whether the average moving speed is higher or lower than a certain threshold value, and T
It transmits to the base station side via RX3. Further, the PWC 8 controls the output power of the TX 5 within a specified range according to the selected cell type or by an instruction from the base station.

On the base station side, cell type selection data transmitted from the MSS1, transmitter output power class data,
The optimal field and channel allocation for the MSS1 is performed by comprehensively processing the field intensity data of the related radio waves and the cell configuration of the service area, that is, whether the cell is a single cell or a dual cell.

[0011]

As described above, according to the present invention, the mobile unit of the mobile communication system receives the traveling speed information of the moving body, processes the traveling speed information which fluctuates with time, and calculates the average traveling speed of the moving body. Obtain the data, generate data for selecting the cell type for which the mobile unit should be controlled according to the average moving speed, transmit the data to the base station side, and control the output power of the transmitter according to the selected cell type. By doing so, when the mobile body receives a service in the service area covered by the dual cell of the micro cell and the macro cell, the optimum cell is selected according to the moving speed.

That is, since the macro cell or the micro cell is selected to provide the service in accordance with the speed at which the mobile body moves at a relatively high speed or a low speed, frequent handovers in a short time will not occur. As a result, there is an effect that it is possible to prevent deterioration of call quality and system processing capacity.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a mobile device of a mobile communication system of the present invention.

FIG. 2 is a block diagram showing an example of a mobile device of a conventional mobile communication system.

[Explanation of symbols]

 1, 21 Mobile unit (MSS) 2 Antenna (ANT) 3 Transceiver unit (TRX) 4 Coupling unit (JNT) 5 Transmitter (TX) 6 Receiver (RX) 7,27 Control unit (CTL) 8 Power control unit (PWC) 9 Speed processing unit (SPP) 10 Interface (INF) 11 Vehicle (MBL) 12 Drive unit (DRV) 13 Speed detection unit (SDT) 14 Mobile interface (MSI)

Claims (1)

[Claims] 1. A speed processing means for receiving traveling speed information of a moving body of a mobile communication system to obtain an average traveling speed of the moving body from the traveling speed information which fluctuates with time, and according to the average traveling speed. A mobile unit for generating data for selecting a cell type to be controlled by the mobile unit and transmitting the data to the base station side; and a power control unit for controlling output power of the transmitter according to the cell type. A mobile device of a characteristic mobile communication system.