Channel detection method and device, terminal and base station

A channel detection and terminal technology, applied in the field of communication, can solve problems such as ambiguity

Inactive Publication Date: 2016-06-08
YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0005] Since the UE's uplink transmission on subframe n+4 is based on the ULgrant sent by the base station on subframe n, if the uplink LBT is based on load, when will the scheduled UE start to perform uplink CCA detection, that is, receive How to configure the uplink CCA time starting point of the scheduled UE of ULgrant is not clear yet

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  • Channel detection method and device, terminal and base station
  • Channel detection method and device, terminal and base station
  • Channel detection method and device, terminal and base station

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[0066] In order to be able to understand the above objectives, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.

[0067] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited to the specific details disclosed below. Limitations of the embodiment.

[0068] figure 1 It shows a schematic flowchart of a channel detection method when the LTE system works in an unlicensed frequency band according to the first embodiment of the present invention.

[0069] ...

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Abstract

The invention provides a channel detection method and device for use during working of an LTE (Long Term Evolution) system on an unauthorized frequency band, a terminal and a base station. The channel detection method for use during working of the LTE system on the unauthorized frequency band comprises the following steps: receiving an uplink scheduling instruction sent by the base station on a sub-frame n, wherein the uplink scheduling instruction is used for instructing the terminal to transmit uplink data by using allocated resources on a sub-frame n+i; and setting channel detection time in sub-frames positioned after the sub-frame n and before the sub-frame n+i in order to detect an idle/busy state of an uplink channel to be occupied by the terminal. Through adoption of the technical scheme of the invention, a starting point of load-based CCA (Clear Channel Assessment) detection time can be determined during scheduling-based uplink transmission of the terminal, so that the problem of relatively high power consumption caused by blind CCA detection of the terminal can be solved, and meanwhile the channel preemption probability of the terminal can be increased.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a channel detection method when an LTE system works in an unlicensed frequency band, a channel detection device when an LTE system works in an unlicensed frequency band, a terminal and a base station. Background technique [0002] At present, 3GPP has proposed the concept of LAA (LTE Assisted Access, LTE assisted access), which is used to use unlicensed spectrum with the help of LTE (Long Term Evolution) licensed spectrum. When the LTE network uses unlicensed frequency bands, one of the most important key points is to ensure that the LAA system can coexist with existing access technologies (such as Wi-Fi) on a fair and friendly basis. In the traditional LTE system, there is no LBT (ListenBeforeTalk) mechanism to avoid collisions. In order to better coexist with Wi-Fi, the LTE system needs an LBT mechanism. In this way, if LTE detects that the channel is busy on the unl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/08H04W72/12H04W74/08
CPCH04W74/0816H04W72/542H04W72/23H04W74/08H04W74/0808H04W16/14
Inventor 李明菊朱亚军张云飞
Owner YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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