Clear channel assessment detection method and clear channel assessment detection device

A detection method and a clean technology, applied in the field of communication, can solve the problem of low access probability of unlicensed carriers

Active Publication Date: 2017-05-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention provides a method and device for channel cleanness evaluation and detection to at least solve the problem of low access probability of unlicensed carriers caused by CCA detection in the related art

Method used

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  • Clear channel assessment detection method and clear channel assessment detection device
  • Clear channel assessment detection method and clear channel assessment detection device
  • Clear channel assessment detection method and clear channel assessment detection device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0181] This optional embodiment mainly describes the CCA detection pattern when the transmission equipment performs channel idle detection at different stages, and how the transmission equipment to be multiplexed identifies whether the interference source is from the transmission equipment of the same operator or a different operator. The transmission equipment, or the interference source is from the transmission equipment in the same system under the same operator or a node in a different system. In addition, the energy detected on the corresponding Muting resource satisfies the preset CCA threshold. Optionally, the CCA detection threshold can be adjusted, which is beneficial for transmission devices in the same system to access unlicensed carriers more easily. Optionally, if the energy detected by the transmission device on resources other than the corresponding Muting resource or on the entire bandwidth is within a specific CCA detection threshold interval, the transmission ...

Embodiment 2

[0214]This optional embodiment mainly focuses on the frequency domain pattern composed of Muting-specific REs on each PRB in the frequency domain, and the time-domain pattern of Muting-specific k consecutive OFDM symbols in the time domain, which consists of different time-frequency domain Muting positions Different time-frequency domain patterns for CCA detection are formed. Wherein, the time domain pattern is related to the transmission burst length or the number of subframes.

[0215] By parameters: the index number of the starting physical resource block PRB in the frequency domain, the index number of the starting resource element RE in each PRB in the frequency domain, the number of consecutive REs in the frequency domain, and the number of REs (blocks) in the frequency domain The number of REs contained between the next RE (block) constitutes a detection pattern in the frequency domain. The pattern in the time domain is the starting subframe index number, the starting ...

Embodiment 3

[0234] This optional embodiment mainly focuses on the frequency domain pattern composed of Muting-specific REs on each PRB in the frequency domain, and the time-domain pattern of Muting-specific discrete k OFDM symbols (blocks) in the time domain. Muting positions in the frequency domain constitute different time-frequency domain patterns for CCA detection. Wherein, the time domain pattern is related to the transmission burst length or the number of subframes.

[0235] The difference from the second embodiment lies in that the time-domain pattern is composed of discrete OFDM symbols or OFDM symbol blocks or time segments to form CCA detection pattern positions in the time domain. The frequency domain pattern is the same as that in Embodiment 1.

[0236] The following example illustrates the time-domain Muting pattern: its time-domain pattern is determined by at least one of the following parameters: time-domain start frame number, start subframe number, start OFDM symbol inde...

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Abstract

The invention provides a clear channel assessment detection method and a clear channel assessment detection device. The method comprises the following steps: acquiring a clear channel assessment CCA detection pattern or a muting pattern; and performing CCA detection on a non-authorized carrier channel on a resource corresponding to the CCA detection pattern or on a resource corresponding to the muting pattern. According to the invention, the problem that low reuse efficiency and low access probability of unauthorized carriers are caused as the interference source cannot be identified during CCA detection in the related technologies is solved, and the resource reuse efficiency and the channel access probability in the related technologies are improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for evaluating and detecting channel cleanliness. Background technique [0002] With the rapid growth of data services, the data transmission pressure on licensed spectrum carriers is also increasing. Therefore, using unlicensed spectrum carriers to share the data traffic in licensed carriers has become a follow-up Long Term Evolution (LTE ) is an important evolutionary direction of development. [0003] The characteristics of unlicensed spectrum are: unlicensed spectrum does not need to be purchased, spectrum resources have zero cost, and have the characteristics of free or low cost; individuals and enterprises can participate in the deployment, equipment manufacturers can deploy equipment at will, and have low access requirements. The feature of low cost; the 5GHz, 2.4GHz and other frequency bands in the unlicensed spectrum can be used, which has the featu...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04W24/02H04W74/08
CPCH04W16/14H04W24/02H04W74/0808H04L5/001
Inventor 杨玲苟伟彭佛才赵亚军李新彩毕峰张晨晨
Owner ZTE CORP
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