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Communication control method and communication control system

A technology for communication control and notification signals, applied in transmission systems, wireless communication, communication between multiple stations, etc., can solve problems such as large received power levels, difficulty in identifying radio communication line bands and interference levels, and operational problems.

Inactive Publication Date: 2003-09-17
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise, the received power level of interference on other radio communication lines can become greater and cause operational problems
However, conventional allocation methods have difficulty identifying the frequency bands and interference levels used by all radio communication lines

Method used

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  • Communication control method and communication control system
  • Communication control method and communication control system
  • Communication control method and communication control system

Examples

Experimental program
Comparison scheme
Effect test

no. 2 example

[0071] Next, a second embodiment of the present invention will be described.

[0072] Figure 7 It is a schematic diagram of the communication control system of this embodiment. exist Figure 7 in, f 1 and f 2 Indicates the band on the transmission band. This frequency band is allocated to radio communication lines that carry out two-way communication between the radio station 1 and the radio station 2 .

[0073] like Figure 7 As shown, the radio station 1 and the radio station 2 respectively transmit notification signals containing information on the received radio communication line band. The radio station 3 identifies the bands used by the radio stations 1, 2 and 4 by receiving the notification signal. The radio station 3 can thus determine a frequency band which does not interfere with the radio communication link between the radio station 1 and the radio station 2 .

[0074]In particular, in this embodiment, each radio station (ie, radio stations 1 to 4) modulate...

no. 3 example

[0081] Fig. 9 is a schematic flowchart of the communication control system of the third embodiment. In Figure 9, f 1 ~ f 5 Indicates the band on the transmission band, f 1’ ~ f 5’ express with f 1 ~ f 5 related to the frequencies on the control band. These frequency bands are respectively assigned to radio communication lines between the radio station 1 and the radio station 4 and between the radio station 2 and the radio station 3 for two-way communication.

[0082] The radio stations 1, 2 and 3 continuously transmit notification signals corresponding to the received bands at specific time intervals as shown in Figs. 9(a), (b) and (c). Each radio station can randomly determine the transmission timing of the notification signal within a certain period of time. For example, if a band is allocated to the radio communication line from the radio station 4 to the radio station 5, the radio station 5 measures the received power level of the received radio signal as shown in F...

no. 4 example

[0088] FIG. 11 is a schematic diagram of a communication control method in this embodiment. In this embodiment, the transmission side radio station determines the transmission power level of the notification signal transmitted through the control band according to the carrier-to-interference ratio (hereinafter referred to as CIR).

[0089] As shown in Figs. 11(a) and (b), the transmission power level is set according to the CIR. notification signal to send power P ctb send, P ctb Calculated by the following formula. P ctb = CIR 1 CIR 1 - CIR req · P tb

[0090] Among them, CIR 1 CIR for radio communication lines, CIR req CIR for communication requirements, P tb For the basic transmit power level, set...

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PUM

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Abstract

The present invention relates to a communication control method and a communication control system. The radio station on the receiving side has a notification signal generator (108) for sending a notification signal for notifying the frequency information of the radio communication line used by the radio station, and a transmitter (111), Used to transmit information indicating the received power level and its frequency as a radio signal. On the other hand, the receiving side radio station has a notification signal measurer (106) for measuring the received power level of the notification signal and detecting the frequency notified by the notification signal, and a band controller (109) for The data and notification signals define an allocatable band for the radio communication link between the radio station on the sending side and the radio station on the receiving side.

Description

technical field [0001] This application is based on, and claims priority from, prior Japanese Patent Application No. P2002-61119 filed March 6, 2002; the entire content of the earlier application is incorporated herein by reference. The present invention relates to a communication control method and a communication control system for allocating available bands when performing radio communication between a base station on a transmitting side and a base station on a receiving side in a radio communication network in which a plurality of radio stations are arranged. Background technique [0002] Generally, when radio communication is performed between a base station on the transmitting side and a base station on the receiving side in a radio communication network in which a plurality of radio stations are arranged, available bands are assigned to radio communication lines. Figure 1 shows the traditional band allocation method. [0003] In FIG. 1 , radio stations 1 to 4 can com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04W16/10H04W72/54
CPCH04W72/0453H04W72/54
Inventor 山口晃一郎油川雄司中山雄二大津徹
Owner NTT DOCOMO INC