US 10,375,579 B2Granted

Channel detection method and system, device, and terminal having base station functions

AssigneeYulong Computer Telecommunication Scientific (Shenzhen) Co., Ltd.

InventorsMing-Ju Li, Ya-Jun Zhu, Yi-Xue Lei, Yun-Fei Zhang

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Abstract

A channel detection method and system of an LTE system in an unlicensed frequency range, a device having base station functions, and a terminal are provided. The method includes: dividing an unlicensed frequency range into several frequency bands; setting a determination threshold value corresponding to each frequency band for detecting busy/idle states of channels in each frequency band; setting channel monitoring subframes for detecting the downlink channel state and/or the uplink channel state in each frequency band in the frame structure of the LTE system; detecting the busy/idle states of the downlink channel and/or the uplink channel in each frequency band according to the determination threshold value. The present invention increases a spectrum utilization rate of the unlicensed frequency range, and prevents an LTE system working in the unlicensed frequency range from causing large interference to other systems while ensuring the LTE system works in the unlicensed frequency range normally.

Claims20

Dependent claims

A channel detection method of an LTE system in an unlicensed frequency range, the channel detection method being applicable to a device having base station functions, and comprising:

dividing an unlicensed frequency range into a plurality of frequency bands;
setting a determination threshold value corresponding to each of the plurality of frequency bands, the determination threshold value being used for detecting a busy/idle state of a channel in each of the plurality of frequency bands;
setting a channel monitoring subframe that is used for detecting a downlink channel state and an uplink channel state in each of the frequency bands in a frame structure of the LTE system, and detecting busy/idle states of the downlink channel and the uplink channel in each of the plurality of frequency bands according to the determination threshold value, comprising:
when the downlink channel state is detected to be idle, transmitting the downlink data, and when the uplink channel state is detected to be idle, transmitting the uplink data;
and
when the downlink channel state or the uplink channel state is detected to be busy, comprising:
taking a random value N;
and
continuously detecting the downlink channel state or the uplink channel state, and taking N=N−1 when the downlink channel state or the uplink channel state is detected to be idle, or unchanging N when the downlink channel state or the uplink channel state is detected to be busy;
and
sending the downlink data or the uplink data when N is reduced to zero.

8 more elements

A device having base station functions comprising:

at least one processor;
and
a storage device storing a plurality of instructions, which when executed by the processor, causes the at least one processor to:
divide an unlicensed frequency range into a plurality of frequency bands;
set a determination threshold value corresponding to each of the plurality of frequency bands, the determination threshold value being used for detecting a busy/idle state of a channel in each of the plurality of frequency bands;
set a channel monitoring subframe that is used for detecting a downlink channel state and an uplink channel state in each of the frequency bands in a frame structure of the LTE system, and detect the busy/idle states of the downlink channel and the uplink channel in each of the frequency bands according to the determination threshold value, comprising:
when the downlink channel state is detected to be idle, transmitting the downlink data, and when the uplink channel state is detected to be idle, transmitting the uplink data;
and
when the downlink channel state or the uplink channel state is detected to be busy, comprising:
taking a random value N;
and
continuously detecting the downlink channel state or the uplink channel state, and taking N=N−1 when the downlink channel state or the uplink channel state is detected to be idle, or unchanging N when the downlink channel state or the uplink channel state is detected to be busy;
and
sending the downlink data or the uplink data when N is reduced to zero.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/444,338Filed 28 Feb 2017 · continuation in part
Priority: CN 2014 1 071973228 Nov 2014
Published: US 2017/0171759 A115 Jun 2017
Granted: 6 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04W 16/14
Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures: spectrum sharing…
H04B 17/309
Of propagation channels: measuring or estimating channel quality parameters
H04L 5/0042
Arrangements for allocating sub-channels of the transmission path: intra-user or intra-terminal allocation
H04L 5/0044
Arrangements for allocating sub-channels of the transmission path: allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH

Family

PCT/CN2014/096024Parent of this continuation-in-part · filed 31 Dec 2014
US 2017/0171759 A1Pre-grant publication · published 15 Jun 2017
US 10,375,579 B2This patent

From the US filing history. Foreign family members aren’t listed.

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