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Method for multiplexing control channel of relay station in orthogonal frequency division multiplexing system

A technology of control channel and orthogonal frequency division, which is applied in the field of mobile communication to achieve the effect of ensuring coverage, frequency diversity gain and simple multiplexing

Inactive Publication Date: 2009-09-09
ZTE CORP
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Problems solved by technology

[0004] At present, the research on control channel multiplexing is a hot spot. However, when RS (Relay Station, relay station) exists in the OFDM system, there are few studies on downlink control channel multiplexing. The current system uses TDM, but The TDM method is not suitable for systems with RS (including transparent RS and non-transparent RS), and this shortcoming is exactly the problem to be solved by this invention

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  • Method for multiplexing control channel of relay station in orthogonal frequency division multiplexing system

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Embodiment Construction

[0022] The present invention is particularly applicable to LTE (3GPP long-term evolution system) and IMT-Advanced (super 3G system) with RS.

[0023] After the introduction of RS, the transmission methods between BS and RS and between RS and UT need to be reconsidered, mainly according to the needs of the receiving end, such as the need for reliability or whether power saving needs to be considered. If the downlink control channel adopts FDM method (such as figure 1 , 2 shown) can obtain frequency diversity gain, that is, the control information can be allocated to different sub-carriers of different symbols, thereby improving the reliability of the control channel; if the TDM method (such as image 3 shown) will be beneficial to the micro sleep mode, that is, the receiver can obtain a better power saving effect. In addition, the present invention also utilizes a new transmission mode HDM (Hybrid Division Multiplex, hybrid division multiplex) on the basis of the existing TDM...

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Abstract

The invention relates to a method for multiplexing a control channel of a relay station in an orthogonal frequency division multiplexing system, which is suitable for a 3GPP long-term evolution system and an ultra 3G system IMT-advanced. The method comprises the following steps that: when the relay station (RS) is a non-transparent RS, downlink control information and data services among a base station (BS), the non-transparent RS and a user terminal (UT) are sent out on a downlink control channel in a frequency division multiplexing (FDM) mode, a time division multiplexing (TDM) mode or a hybrid division multiplexing (HDM) mode, and the HDM mode is a multiplexing mode combining the TDM and the FDM; and when the RS in the system is a transparent RS, the downlink control information between the BS and the transparent RS as well as the downlink control information and the data services between the BS and the UT are sent out on the downlink control channel in the FDM mode, the TDM mode or the HDM mode.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for multiplexing downlink control channels in a 3GPP long-term evolution (LTE) system. Background technique [0002] In the OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) system, since it is a time-frequency two-dimensional data form, the multiplexing form between the control channel and the traffic channel can be in the time direction and in the frequency direction. That is, TDM (Time Division Multiplex, time division multiplexing) mode and FDM (Frequency Division Multiplex, frequency division multiplexing) mode are adopted. [0003] In the LTE system, fully considering the power saving problem of the UT (User Terminal, user terminal), it is necessary for the UT to enter the micro sleep (micro sleep) mode, and finally the control information sent by the BS (base station) adopts the TDM method. For example, a subframe in...

Claims

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Application Information

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IPC IPC(8): H04W16/26H04W88/08H04L27/26
CPCH04L5/0007H04L5/0005H04W72/00H04W88/04H04W84/04H04L5/0053
Inventor 毕峰袁明
Owner ZTE CORP
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