Communication systems

A wireless communication system and communication path technology, applied in the field of two-hop wireless communication system and its transmission

Inactive Publication Date: 2008-02-20
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still the problem of allowing two-way communication (i.e., in the uplink and download directions) without interference

Method used

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Experimental program
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Embodiment Construction

[0035] Embodiments of the present invention provide a frame structure for a multi-hop communication system, which is an extension of the standard TDD frame structure. The proposed frame structure has many benefits, as described later in this specification.

[0036] Frame structure and details of system operation

[0037] The proposed frame structure is designed for the situation that the control information sent from the head node controlling the overall medium access can be received by all the slave nodes working in the network. Furthermore, it is designed in such a way that legacy single-hop TDD mobile devices that are relay-agnostic can work within the new relay-enabled system.

[0038] If the control information cannot be received from the head node (or source device), an additional frame period is required for two-hop transmission. This is because the control information sent by the source device to the intermediate device cannot be received by the destination device wi...

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PUM

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Abstract

A transmission method for use in a two-hop wireless communication system, the system comprising a source apparatus, a destination apparatus and an intermediate apparatus, said source apparatus being operable to transmit information along two links forming a communication path extending from the source apparatus to the destination apparatus via the intermediate apparatus, and the intermediate apparatus being operable to receive information from the source apparatus and to transmit the received information to the destination apparatus, the system having access to a time-frequency format for use in assigning available transmission frequency bandwidth during a discrete transmission interval, said format defining a plurality of transmission windows within such an interval, each window occupying a different part of that interval and having a frequency bandwidth profile within said available transmission frequency bandwidth over its part of that interval, each said window being assignable for such a transmission interval to said source or intermediate apparatus for use in transmission, the method comprising: employing said format to transmit information along the path as two successive transmission signals, link by link, said signals being transmitted using different transmission windows of a particular such transmission interval.

Description

technical field [0001] The present invention relates to wireless communication technology, more specifically, to a two-hop wireless communication system and its transmission method. Background technique [0002] There is currently a lot of interest in the use of multi-hop techniques in packet-based radio communications and other communication systems, where this means that such techniques not only extend the coverage but also increase the capacity (throughput) of the system. [0003] In a multi-hop communication system, communication signals are sent from a source device to a destination device via one or more intermediate devices in a communication direction along a communication path (C). Figure 4 shows a single cell comprising a base station BS (referred to as a "Node B" NB in ​​the context of a 3G communication system), a relay node RN (also referred to as a relay station RS) and a user equipment UE (also referred to as a mobile station MS) Two-hop wireless communicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04Q7/36H04W16/26
CPCH04L5/0007H04L12/66H04L5/0037H04B7/15592H04B7/2606H04W84/047Y02B60/50H04L5/0023H04B7/2043Y02D30/70H04L27/2602H04L5/1469
Inventor 迈克尔·约翰·比默斯·哈特周跃峰
Owner FUJITSU LTD
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