Data transmission method and apparatus in relay transmission type radio network

Abstract

To provide a data transmission method and an apparatus thereof in a relay transmission type radio network capable of selecting an appropriate down-link relay route according to a location of a terminal station. A first relay node having received an up-link ACK packet transmitted by the terminal station transmits to an second relay node the up-link ACK packet including a source terminal station ID and a relay source node ID representing its own node ID. The second relay node having received the up-link ACK packet registers information on a pair of the source terminal station ID and the relay source node ID with a relay node list, and selects an appropriate route of a down-link packet addressed to the terminal station by using the information registered with the relay node list.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional under 37 C.F.R. § 1.53(b) Of prior application Ser. No. 10 / 010,530, filed Dec. 5, 2001, the entirety of which is incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a data transmission method and an apparatus therefor in a relay transmission type radio network. [0004] 2. Description of the Related Art [0005]FIG. 18 is a diagram illustrating a cell configuration of a conventional cellular system. As for the cell configuration of this cellular system, it is comprised of cells 101 and base stations (nodes) 102, where a serviceable area is constituted by placing a plurality of cells as in FIG. 18. Each of nodes 102 is connected by a wire basic network 104 and a wire circuit 103, so that service signals such as voice and data and various control signals are communicated via these links. Moreover, there are cases where each of no...

AI Technical Summary

Benefits of technology

This method allows for adaptive selection of down-link relay routes, improving communication stability and link capacity by reducing interference and optimizing relay route changes, even when terminal stations move, thereby enhancing the efficiency of radio relay type cellular networks compared to ad hoc networks.

Problems solved by technology

In addition, in the case where a high density data transmission system such as multilevel modulation is applied in order to sup-linkport high-speed data transmission, the area covered by one node inevitably becomes smaller to secure required received quality, and so a very large number of the nodes are also placed in this case.

Furthermore, while the cellular systems were mainly designed in quasi-micro and microwave zones in the past, construction of the cellular systems using quasi-millimeter and millimeter wave zones is expected because of a crisis of frequency pressure.

A higher frequency weakens a diffraction effect and makes it markedly straight so that an unexpected call becomes difficult, which inevitably leads to a smaller area covered by each node.

To connect a very large number of the geographically unevenly distributed nodes with the basic network, however, it is necessary to install the wire networks everywhere and so the cost of the entire system increases.

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