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Wireless communication method, system and device

A technology for wireless communication and configuration information, which is applied in the field of communication and can solve problems such as the inability to feedback downlink data packet responses.

Active Publication Date: 2010-11-17
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a wireless communication method, system and device to solve the problem in the prior art that the response of downlink data packets cannot be fed back in the backhaul link

Method used

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  • Wireless communication method, system and device
  • Wireless communication method, system and device
  • Wireless communication method, system and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Embodiment 1. When the symmetric mode of FDD mode is adopted, the position where the relay node sends the feedback signal of each downlink data packet may be the uplink subframe where the downlink subframe of each downlink data packet sent by the base station is delayed by 3 ms.

[0066] For example, when the backhaul link in FDD mode is symmetrical, the number of downlink subframes of the backhaul link is equal to the number of uplink subframes. In order not to affect the HARQ timing relationship of the access link, the downlink subframes and uplink subframes of the backhaul link Reserved in pairs, and set to send downlink data packets through PDSCH and feed back the corresponding ACK / NACK position, and the delay difference is 3ms. Therefore, in symmetrical mode, each downlink subframe of the backhaul link sends downlink through PDSCH For the data packet, its corresponding ACK / NACK feedback position is at the uplink subframe position of the backhaul link with a delay of...

Embodiment 2

[0068] Embodiment 2. When the asymmetric mode of the FDD mode is adopted, in order not to affect the HARQ timing of the access link, the downlink backhaul subframes are more than the uplink backhaul subframes, that is, the number of downlink subframes used to send downlink data packets is greater than the number of downlink subframes used for sending downlink data packets. For the number of uplink subframes for the feedback response, the feedback signal corresponding to the downlink data packet can be sent to the base station using the principle of balance in the uplink subframe after the downlink subframe of each downlink data packet sent by the base station is delayed by at least 3ms.

[0069] Suppose the number of downlink subframes is m, the number of uplink subframes is n, m>n, in order to meet the HARQ delay, m downlink subframes and n uplink subframes are reserved, and m downlink backhaul subframes are set as transmission For the downlink data packet, the ACK / NACK corres...

Embodiment 3

[0074] Embodiment 3. When the symmetric mode of the TDD mode is adopted, the feedback signal corresponding to the downlink data packet can be sent in the uplink subframe with the downlink subframe delay (k-1) ms of each downlink data packet sent by the base station, wherein , (k-1)ms is the delay value corresponding to the timing relationship under the frame structure described in the LTE technical specification.

[0075] For example: in FDD mode, the number of backhaul downlink subframes is equal to the number of uplink subframes. In order not to affect the HARQ timing relationship of the access link, backhaul downlink subframes and uplink subframes are reserved in pairs, and the delay difference is (k- 1) ms, the value of k is shown in Table 1. Therefore, in the symmetric mode, each downlink backhaul subframe sends PDSCH, and its corresponding ACK / NACK feedback position is at the uplink backhaul subframe position with a delay of (k-1) ms.

[0076] Such as Figure 5 As shown...

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Abstract

The invention discloses a wireless communication method, a wireless communication system and a wireless communication device. The method comprises the following steps that: a relay node determines an uplink sub-frame position and a downlink sub-frame position for backhaul link transmission according to backhaul link configuration information received from a base station; the relay node receives a downlink data packet transmitted by the base station on a corresponding downlink sub-frame according to the downlink sub-frame position for the backhaul link transmission; and after receiving the downlink data packet, the relay node transmits acknowledgement (ACK) / negative acknowledgement (NACK) feedback corresponding to the downlink data packet to the base station on an uplink sub-frame for the backhaul link transmission. Due to the adoption of the method, the response problem that the downlink data packet cannot be fed back in a backhaul link in the prior art is solved.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a wireless communication method, system and device. Background technique [0002] The introduction of the relay node makes there are three wireless links in the relay-based mobile communication system: the direct link between the base station and the macro user terminal (eNB-macro UE), and the direct link between the base station and the relay node (eNB-macro UE). The backhaul link (backhaul link) between eNB-RN and the access link (access link) between relay node and relay user terminal (RN-relay UE), considering the signal interference limit of wireless communication, so three Links need to use orthogonal radio resources. Since the transceiver of the relay node is in the half-duplex time-division working mode, the backhaul (backhaul) link and the access (access) link occupy different time slots in the TDD frame structure, but the direct (direct) link and the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/04H04B7/26
Inventor 张文健潘学明沈祖康王立波
Owner DATANG MOBILE COMM EQUIP CO LTD