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Method and device for transmitting downlink data of relay link

A technology of downlink data and relay links, applied in the field of communication, can solve problems such as different pilot densities and complex mapping, and achieve the effect of avoiding differences in demodulation performance and ensuring simplicity and efficiency

Inactive Publication Date: 2011-06-08
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0011] Therefore, since the number of resource units for transmitting pilots in each OFDM symbol in the R-PDCCH region is different, that is, the pilot density is different, the mapping from REGs to REs in the R-PDCCH region will be complicated, and it will also cause There are two cases of DMRS transmission and two cases of R-PDCCH mapping

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  • Method and device for transmitting downlink data of relay link
  • Method and device for transmitting downlink data of relay link
  • Method and device for transmitting downlink data of relay link

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Embodiment Construction

[0033] In order to simplify the complexity of mapping from REGs to REs in the R-PDCCH region when using the existing technology to transmit pilots in the R-PDCCH region, in the embodiment of the present invention, the R-PDCCH region and the R-PDSCH region in the same PRB use The downlink data is transmitted in TDM mode, and the resource elements in the R-PDCCH region that can transmit the dedicated pilot do not transmit the downlink data.

[0034] see Figure 5 As shown, the method for sending relay link downlink data in the embodiment of the present invention includes the following steps:

[0035] Step 501: The base station uses TDM to transmit downlink data in the R-PDCCH region and R-PDSCH region in the same PRB, and the resource elements in the R-PDCCH region that can transmit dedicated pilots do not send downlink data.

[0036] When the receiving side is configured to use the common pilot to demodulate the downlink data sent in the R-PDSCH region, the resource units in t...

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Abstract

The invention discloses a method and device for transmitting downlink data of a relay link, which can maintain the consistency for special pilot frequency configuration of a plurality of RPB (Physical Resource Blocks) scheduled by a terminal. The method comprises the step of transmitting downlink data by adopting a TDM (Time Division Multiplexing) mode in an R-PDCCH (Relay-Physical Downlink Control Channel) area and an R-PDSCH (Relay-Physical Downlink Share Channel) area in the same PRB, wherein a resource unit capable of transmitting special pilot frequency in the R-PDCCH area does not transmit the downlink data.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for transmitting downlink data of a relay link. Background technique [0002] Such as figure 1 As shown, in the advanced long-term evolution (LTE-A) system, the evolved base station (eNB) is connected to the core network (CN) through a wired interface; the relay node (RN) is connected to the eNB through a wireless interface; the terminal (UE) is connected to the core network (CN) through a wireless interface The interface is connected to RN or eNB. Wherein, the link between RN and eNB is a relay (backhaul) link; the link between RN and UE is an access link. [0003] Currently, there are two types of channels in the backhaul link, namely, a relay physical downlink control channel (R-PDSCH) and a relay physical downlink shared channel (R-PDCCH). The R-PDCCH refers to the control channel sent by the eNB to the RN on the backhaul link. R-PDSCH r...

Claims

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Application Information

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IPC IPC(8): H04W28/26H04B7/26H04W72/12
CPCH04L2001/0097H04L1/0084
Inventor 王立波沈祖康潘学明肖国军张文健
Owner DATANG MOBILE COMM EQUIP CO LTD
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