Switching method between semi-duplex and multicast collaboration relay scheme and corresponding based station

A cooperative relay and half-duplex technology, applied in the direction of radio/inductive link selection arrangement, network topology, electrical components, etc., can solve the problems of limiting the performance and limitations of the relay system, and achieve performance gain and capacity improvement, and cost Low cost, easy to deploy

Inactive Publication Date: 2009-03-18
ZTE CORP
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  • Application Information

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Problems solved by technology

However, the mobile communication environment is a time-varying system. Using a fixed relay mode limits the performance of the relay system. In particular, the channel conditions and geogra

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  • Switching method between semi-duplex and multicast collaboration relay scheme and corresponding based station
  • Switching method between semi-duplex and multicast collaboration relay scheme and corresponding based station
  • Switching method between semi-duplex and multicast collaboration relay scheme and corresponding based station

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Embodiment Construction

[0041] The basic idea of ​​the present invention is that the half-duplex and multicast cooperative relay modes are simultaneously adopted in the two-hop relay system, and the base station switches between the two relay modes when the switching conditions are met according to the current channel conditions. To work in the most suitable relay mode.

[0042] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] The two-hop relay system of this embodiment is such as Figure 1A and Figure 1BAs shown, only the downlink situation is discussed here. The system includes: a base station 101 , a relay station 102 and a mobile terminal 103 . The base station 101 can...

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Abstract

The invention discloses a switching method for semi-duplex and multicast collaborated relay mode and a corresponding base station, wherein the base station computes channel rate on three channel links according to channel quality information of three links of base station-relay station, relay station-mobile terminal and base station-mobile terminal, then computes effective channel rate on link of base station-relay station-mobile terminal under semi-duplex relay mode and multicast collaboration mode, executes mode switching judgment combining channel quality of base station-mobile terminal link and determined switching policy, switches between the semi-duplex relay mode and multicast collaborated relay mode. The corresponding base station comprises a first sending module, a second sending module and a relay mode control module. The invention can fully utilize relay system to reach the effect of improving network performance.

Description

technical field [0001] The present invention relates to the field of mobile communication, and more specifically, relates to a two-hop relay system and a method for switching relay modes adopted in the system. Background technique [0002] Relay technology, as a potential technical solution that can improve cell edge user throughput and better achieve high data rate coverage, has received extensive attention from various international standardization organizations. At present, although in the discussion of 3GPP LTE_Advanced, some companies have proposed some general relay solutions, but for relay systems that process data at different levels, such as amplifying and forwarding at the physical layer (layer 1) respectively 1. In the relay stations and relay systems that decode and re-encode data at the media access layer (layer 2) and forward data in the relay mode at the network layer (layer 3), how to effectively increase the system capacity is a problem that needs further st...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04Q7/30
CPCH04W88/04H04W36/00H04W84/047H04B7/15557H04W36/0011
Inventor 袁弋非李国红霍迪
Owner ZTE CORP
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