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Wireless transmission system

A wireless transmission and mobile station technology, applied in transmission systems, digital transmission systems, wireless communications, etc., and can solve problems such as the reduction of frequency utilization efficiency

Inactive Publication Date: 2013-04-10
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the case of assigning different frequency channels to each adjacent cell in the central part of the cell, that is, around the base station, the frequency utilization efficiency is greatly reduced compared to the case of assigning the same frequency channel in adjacent cells.

Method used

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no. 1 example

[0043] figure 2 , Figure 3A and 3B It is a diagram conceptually showing channel allocation in the wireless transmission system of the present invention. like figure 2 As shown, in the wireless transmission system of the present invention, uplink is used for communication from the mobile station to the base station, and downlink is used for communication from the base station to the mobile station. The uplink and downlink are switched according to a certain period of time to transmit data.

[0044] like Figure 3A and 3B As shown, a base station is arranged near the center of each of the cell areas A to G. Each cell area is divided into a plurality of areas. exist Figure 3A and 3B In the example shown, each cell area is divided into two areas. This area is divided into blocks corresponding to uplink frames and downlink frames. A mobile station communicates using a channel allocated to an area where the mobile station exists. exist Figure 3A , the central area ...

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Abstract

In the viewpoint of the present invention, a radio transmission system includes a plurality of mobile stations and base stations existing in a cell area. the base station divides the uplink frame and the downlink frame into a plurality of blocks, assigns a specific one of the plurality of blocks to each of the plurality of mobile stations, assigns a specific frequency channel to each of the mobile stations, and The specific block and the specific channel are notified to the respective mobile stations. The lengths of the multiple blocks are arbitrary, and the sum of the lengths of the multiple blocks is equal to the length of the frame.

Description

technical field [0001] The present invention relates to a wireless transmission system, in particular to a wireless transmission system configured as a base station constituting a cell. Background technique [0002] In a currently widespread mobile communication system, a service area, which is an area where communication can be performed for providing services, is divided into relatively small wireless sectors (zones) called cells. In such a system, a plurality of base stations are arranged so as to cover a radio sector, and a mobile station sets a radio frequency channel to communicate with the plurality of base stations. If the same frequency channel is allocated to adjacent cells, the inter-cell interference is greatest at the end of the cell, and the maximum throughput is significantly lower than that at the center of the cell, that is, around the base station. Therefore, in order to prevent interference in adjacent cells, a technique of using different frequency chann...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/10H04J11/00H04W16/30H04W72/06
CPCH04L5/0007H04L5/0037H04L5/0058H04L5/0091H04W16/30H04W28/24H04W16/02H04W28/04H04L5/143H04W72/541H04W74/0866H04L5/0005H04L5/003H04W24/02H04W88/08
Inventor 小柳宪治
Owner NEC CORP