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Hybrid automatic repeat processing method based on LAA (Licensed-Assisted Access) and base station

A hybrid automatic retransmission and processing method technology, applied in the field of communication, can solve problems such as difficult to adapt to fast channel occupation and release transmission gain, and achieve the effect of maximizing the use of channel resources, increasing throughput gain, and quickly sending data

Inactive Publication Date: 2017-05-31
HUAWEI TECH CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

It can solve the problem that the LTE system scheduler in the prior art is difficult to adapt to the rapid occupation and release of the channel under LAA to improve the transmission gain

Method used

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  • Hybrid automatic repeat processing method based on LAA (Licensed-Assisted Access) and base station
  • Hybrid automatic repeat processing method based on LAA (Licensed-Assisted Access) and base station
  • Hybrid automatic repeat processing method based on LAA (Licensed-Assisted Access) and base station

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0039] see figure 1 , is a schematic structural diagram of an LTE communication system provided by an embodiment of the present invention. In an embodiment of the present invention, the LTE communication system includes a base station 1 and a user equipment 2. The base station 1 includes a BBU11 and an RRU12. Between the base station 1 and the user equipment 2 Data is transmitted through the wireless air interface. The auxiliary access channel can be an unlicensed...

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Abstract

The embodiments of the invention disclose a hybrid automatic repeat processing method based on LAA (Licensed-Assisted Access), comprising: according to the scheduling instruction of the BBU at the sub-frame N, transmitting by the RRU downlink data packets to user equipment (UE) at the sub-frame N+L; receiving by the RRU the first feedback information returned by the EU according to the downlink data packets at the sub-frame N+M and forwarding the first feedback information to the BBU; receiving the first feedback information by the BBU at sub-frame N+P to obtain the channel state of the auxiliary accessing channel in the sub-frame N+L; if the channel state indicates a not-usable state, correcting by the BBU the first feedback information to second feedback information; according to the second feedback information, generating by the BBU the re-transmission data packets for the downlink data packets wherein the NDIs of the re-transmission data packets are not toggled and the redundancy version edition remains unchanged; and re-transmitting data packets to the UE by the BBU at sub-frame N+P through the RRU. The embodiments of the invention also disclose a base station. With the invention, a hybrid automatic repeat request (HARQ) based on LAA can be realized which increases the data throughput and gain.

Description

technical field [0001] The present invention relates to the communication field, in particular to an LAA-based hybrid automatic retransmission processing method and a base station. Background technique [0002] With the rapid increase of communication traffic, 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project, 3GPP for short) licensed spectrum is increasingly insufficient to provide higher network capacity. In order to further improve the utilization of spectrum resources, 3GPP is discussing how to use unlicensed spectrum, such as the 5GHz frequency band, with the help of licensed spectrum. These unlicensed spectrums are currently mainly used by WiFi (Wireless Fidelity, WiFi for short), Bluetooth, radar and medical systems. Generally speaking, access technologies designed for licensed frequency bands, such as LTE (Long Term Evolution, LTE for short) are not suitable for use in unlicensed frequency bands, because access technologies such as LTE opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W72/12
CPCH04L1/1806H04W72/54H04W72/23H04L1/18
Inventor 胡磊
Owner HUAWEI TECH CO LTD
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