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Relay link channel estimation method, system and equipment

A channel estimation and relay link technology, which is applied in the field of channel estimation, can solve the problems that the relay node cannot estimate the channel of the relay link, cannot obtain the downlink signal of the evolved base station, and the public pilot is not available to the relay node, etc. To achieve a compatible effect

Active Publication Date: 2013-01-09
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention provides a channel estimation method, system and relay node equipment in a relay link, which are used to solve the problem that the common pilot frequency in the control area of ​​the MBSFN subframe is not available to the relay node, resulting in the failure of the relay node to center The channel estimation of the subsequent link makes it impossible to obtain the downlink signal sent by the evolved base station

Method used

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  • Relay link channel estimation method, system and equipment
  • Relay link channel estimation method, system and equipment
  • Relay link channel estimation method, system and equipment

Examples

Experimental program
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Embodiment 1

[0049] In this embodiment, the measurement pilot of the home eNB of the RN is configured on the OFDM symbol in the Relay Backhaul subframe. The relay link uses measurement pilots for channel measurement; the relay control channel in the relay link uses measurement pilots for demodulation; the relay data channel in the relay link uses dedicated pilots for demodulation. like Figure 5 shown, including steps:

[0050] S501. The eNB notifies the RN and Macro UE under its jurisdiction through a broadcast message or high-level signaling, including the configuration information of the measurement pilot;

[0051] Preferably, the measurement pilot is configured in the control part of the Relay Backhaul subframe;

[0052] S502. The RN detects the measurement pilot according to the configuration information of the measurement pilot;

[0053] S503, the RN uses the detected measurement pilot to perform channel measurement, and obtains measurement results, the measurement results include...

Embodiment 2

[0068] In this embodiment, the relay-specific public pilot is configured in the control part in the special area, and the relay-specific public pilot is only distributed in the special area of ​​the relay link and does not perform shaping. The relay link uses relay-specific common pilots for channel measurement; the relay control channel in the relay link uses relay-specific common pilots for demodulation; the relay data channel in the relay link uses dedicated pilots to demodulate. like Image 6 shown, including steps:

[0069] S601. The eNB notifies the RN under its jurisdiction through a local broadcast message or high-level signaling, including the configuration information of the relay-specific common pilot;

[0070] Preferably, the relay-specific common pilot is configured in the control part of the Relay Backhaul subframe;

[0071] S602. The RN detects the relay-specific common pilot according to the configuration information of the relay-specific common pilot;

[0...

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Abstract

The invention discloses a relay link channel estimation method, a relay link channel estimation system and relay link channel estimation equipment, which are used for solving the problem that RN cannot estimate the channel of the relay link and therefore cannot acquire the downlink signals sent by an eNB to the RN due to the fact that a public pilot frequency in a control area of an MBSFN subframe is unavailable for a relay node. The method comprises: the RN performs channel measurement by using measurement pilot frequency or a relay special public pilot frequency and reports a measurement result to the eNB; the RN demodulates a relay control channel by using the measurement pilot frequency or the relay special public pilot frequency and acquires a downlink control signaling fed back by the eNB according to the measurement result, wherein the downlink signaling at least comprises configuration instruction information and downlink data resource position information; and the RN detects the special pilot frequency according to the configuration instruction information and demodulates a relay data channel indicated by the resource position information by using the detected special pilot frequency so as to acquire the download data of a local node.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a channel estimation technique in a relay link. Background technique [0002] 3GPP (3rd Generation Partnership Project, third generation mobile communication standardization organization) has started the standardization work of Long Term Evolution (LTE). The LTE system is based on Orthogonal Frequency Division Multiplex (OFDM) technology, the subcarrier spacing is set to 15kHz, and the corresponding OFDM symbol length is 66.67us. The LTE system includes two duplex modes: TDD (Time Division Duplex, time division duplex) and FDD (Frequency Division Duplex, frequency division duplex). TDD-based frame structure such as figure 1 As shown, a 10ms wireless frame (Frame) is composed of two 5ms half-frames, and each half-frame is composed of eight 0.5ms business time slots (Time Slot, TS) and three special areas, and the three special areas are respectively : DwPTS (Downlink Pilot T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/10H04W72/12H04L25/02
Inventor 徐婧潘学明沈祖康肖国军
Owner DATANG MOBILE COMM EQUIP CO LTD