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Communication system

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

Inactive Publication Date: 2011-10-26
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in any proposal involving synchronous BS and RS operation (i.e., aligning frame start time), a fundamental question is how to control the reception to transmit transition points in the RS and how to prevent extra Tx / Rx in the frame convert

Method used

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Embodiment Construction

[0044] Frame Structure Description

[0045] Such as figure 1 As shown, the first part of the technical solution according to the embodiment of the present invention uses an improved frame structure at the BS and the RS.

[0046] The frame structure provides an optimal upgradeable technical solution. In the case of two-hop relay, it requires subdivision of the subframe into only two zones or transmission intervals, and does not require any additional Tx / Rx at the device compared to what is used in a single-hop system convert. The first zone in the DL is BS-MS or RS-MS communication. The second zone is used for BS-RS communication. Although intra-relay on DL is not supported, it is possible to perform UL intra-relay. The advantage in this embodiment is due to the fact that the transition from transmit to receive is at the end of the DL subframe, i.e., placing the communication from the BS to the RS at the end of the subframe and in the uplink Communication from RS to BS...

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Abstract

The invention provides a communication system and a transmission method therefor. The system includes a source apparatus, a destination apparatus and one or more intermediate apparatuses. The system can 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 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 one or more of said apparatuses for use in transmission. The method includes employing said format for such a transmission intervalto assign the control window to the source apparatus and to the intermediate apparatus for control information transmission and to assign the relay window to the source apparatus for data transmission to a particular one of said intermediate apparatuses. In this way, at least one window between the preamble window and the relay window can be assigned to the particular intermediate apparatus for data transmission. The method also includes transmitting in the transmission interval.

Description

technical field [0001] The present invention relates to wireless communication technology, more specifically, to a multi-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 6 A single-cell double-hop system 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) is shown. wirel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04W88/00H04L27/26
CPCH04L5/14H04L25/20H04L27/2602H04B7/155H04B7/204
Inventor 迈克尔·约翰·比默斯·哈特周跃峰
Owner FUJITSU LTD