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Uplink data transmission method and device based on LAA network

A data transmission method and data technology, applied in the field of communication processing, can solve problems such as increasing UE energy consumption, affecting UE backward compatibility, and difficult data alignment, so as to reduce complexity and energy consumption, and solve multi-user data alignment problems Effect

Inactive Publication Date: 2017-10-03
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing LBT detection technology is carried out at the UE side, which has the following defects: (1) Since there is no ready-made uplink data transmission protocol in the prior art, the uplink LBT detection has no support for the uplink transmission protocol, and a new detection method needs to be developed mechanism and parameter configuration, which will increase the complexity of the UE and affect the backward compatibility of the UE; (2) completing the uplink transmission LBT detection of the UE will increase the energy consumption of the UE; (3) since the LAA network supports multi-user multiplexing However, the duration of LBT detection for multiple UEs is not all the same, which makes it difficult to align the data of multiple UEs after LBT detection

Method used

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  • Uplink data transmission method and device based on LAA network
  • Uplink data transmission method and device based on LAA network
  • Uplink data transmission method and device based on LAA network

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Embodiment 1

[0021] figure 1 It is a flow chart of an LAA network-based uplink data transmission method provided by Embodiment 1 of the present invention. This embodiment is applicable to the scenario of performing uplink data transmission on an unlicensed channel. The method can be based on the method provided by the embodiment of the present invention LAA network uplink data transmission device, which can be integrated in the base station, such as figure 1 shown, including:

[0022] S101. The base station allocates scheduling resources for the UE according to a scheduling request message of the UE, and the scheduling resources include unlicensed channels for uplink data transmission.

[0023] Wherein, the UE is a terminal device that accesses the LAA network, and may specifically be a mobile terminal, a tablet computer, a fixed terminal, and the like. The base station and UE described in this embodiment are in the LAA network.

[0024] This step is applicable to both self-carrier sche...

Embodiment approach

[0040] In the first implementation manner, it is determined whether there is a hidden node outside the preset transmission range of the unlicensed channel according to the received signal strength indicator RSSI average value and the RSSI measurement value. Specifically, the base station receives the received RSSI average value for different channels within the third preset time period reported by the UE, and at the same time, the base station performs RSSI measurement for different channels within the third preset time period , to obtain the RSSI measurement value, the base station compares the RSSI measurement value with the RSSI average value, and determines to be in the There is a hidden node outside the preset transmission range of the unlicensed channel; otherwise, it is determined that there is no hidden node outside the preset transmission range of the unlicensed channel. When the base station determines that the unlicensed channel is idle and there is no hidden node o...

Embodiment 2

[0045] figure 2 It is a flow chart of an LAA network-based uplink data transmission method provided by Embodiment 2 of the present invention. This embodiment is an embodiment corresponding to uplink data transmission when self-carrier bearer, specifically including:

[0046] S201. After the base station in the LAA network receives a scheduling request from a UE within its coverage, it performs LBT detection of a variable-length contention window on a selected unlicensed channel.

[0047] Specifically, after it is determined that the unlicensed channel is idle, perform step S202; otherwise, perform step S206.

[0048] If the time when the base station sends the UL grant indication message to the scheduled UE is T, the base station performs the LBT detection process on the same ungranted channel in the last several OFDM symbols before the UE uplink transmission (for example, T+3). The LBT detection process may be a fixed time length LBT detection or a variable length contentio...

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Abstract

The invention discloses an uplink data transmission method and device based on an LAA network. The method comprises the steps that a base station allocates a scheduling resource for UE according to the scheduling request message of the user equipment UE, wherein the scheduling resource comprises an unlicensed channel used for uplink data transmission; and the base station carries out pre-talk monitoring LBT detection on the unlicensed channel in a first predetermined period of time before the UE starts transmitting uplink data, and instructs the UE to transmit the uplink data on the unlicensed channel when the unlicensed channel is idle. According to the invention, an LBT detection process is carried out at the base station; the problem of multi-user data alignment caused by the LBT detection at the UE is solved; and the complexity and energy loss of the UE are reduced.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of communication processing, and in particular to a method and device for uplink data transmission based on a License Assisted Access (LAA) network. Background technique [0002] In the next few years, the traffic carried by the cellular network will increase significantly. To meet the requirements of a large number of users and various services, a Long Term Evolution (Long Term Evolution, LTE) network needs more spectrum resources to ensure service quality. The licensed frequency band can efficiently and reliably complete the high-speed transmission of data, and is the preferred frequency resource, and most of the current network equipment is deployed in the licensed frequency band, so the research and utilization of the licensed frequency band is still very important for mobile communication networks. At the same time, in response to market demand, operators have gradually begun to u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/12H04W74/08
CPCH04W72/1268H04W74/0816H04W72/23Y02D30/70
Inventor 田辉秦城高向东刘章兴
Owner BEIJING XINWEI TELECOM TECH
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