Communication method and device based on LAA (Licensed Assisted Access)

A communication method and communication device technology, applied in wireless communication, signaling distribution, transmission path sub-channel distribution, etc., can solve problems such as poor user experience, lower system efficiency, and delayed information reception, so as to improve communication speed and communication efficiency , to reduce the effect of delay

Active Publication Date: 2017-05-31
BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, if the above scheduling method is still used in the unlicensed spectrum, when the base station detects the pre-configured scheduled carrier and finds that the carrier is currently unavailable, it will re-schedule, detect and send information, thereby further delaying UE receipt of information
Especially for the uplink Hybrid Auto Repeat Request (HARQ), the occurrence of the above situation will bring greater delay, resulting in reduced system efficiency and poor user experience

Method used

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  • Communication method and device based on LAA (Licensed Assisted Access)
  • Communication method and device based on LAA (Licensed Assisted Access)
  • Communication method and device based on LAA (Licensed Assisted Access)

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Embodiment Construction

[0036]As mentioned in the background technology, if the scheduling method in the prior art is still used in the unlicensed spectrum, when the pre-configured scheduled carrier cannot obtain channel transmission resources through sensing, the reception of information by the UE will be further delayed , especially for uplink hybrid automatic repeat request (Hybrid Auto Repeat Request, HARQ) will bring greater delay, reduce system efficiency, and poor user experience.

[0037] The embodiment of the present invention utilizes the opportunistic transmission characteristics brought about by the listening mechanism of Listen Before Talk (LBT) in LAA, so that all unlicensed carrier cells have the opportunity to send information, and the terminal can actively deblind without network scheduling. The carrier is detected to obtain downlink control information, thereby reducing the delay and speeding up the reception of information by the terminal.

[0038] In order to make the above object...

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Abstract

The invention discloses a communication method and device based on LAA (Licensed Assisted Access). The communication method and device based on the LAA comprises the steps of sending cell group information to a terminal, wherein the cell group information appoints to a plurality of cells, and the plurality of cells comprise unlicensed cells and licensed cells; and sending downlink control information through the cells of activated states in the plurality of cells, wherein the cell group information is used for indicating the terminal to carry out a blind test on the plurality of cells, thereby obtaining the downlink control information. According to the technical scheme, the communication speed and efficiency of an LAA system are improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to an LAA-based communication method and device. Background technique [0002] In recent years, with the popularization of mobile devices and the surge of mobile data traffic and wired network traffic, the pressure on operators' network capacity has soared. However, there is a shortage of spectrum resources; in the licensed frequency bands, especially the high-value low-frequency band resources, not only the frequency of use is limited, but also rapidly consumed by the rapidly growing user base. Globally, the 5GHz license-free frequency band still has a considerable portion of available spectrum, and operators and equipment manufacturers are exploring the use of unlicensed spectrum to increase network capacity. Therefore, Licensed Assisted Access (LAA) technology, also known as licensed-band assisted unlicensed spectrum access technology, emerged as the times...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/00H04W74/08H04L5/00
CPCH04L5/0055H04L5/0098H04W74/006H04W74/0808H04W16/14H04W48/12H04W72/23H04W72/21H04L1/1864H04W72/1268
Inventor 王化磊徐伟杰潘振岗
Owner BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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