CN106455087B

CN106455087B - Method and device for determining competition resources

Info

Publication number: CN106455087B
Application number: CN201510479180.0A
Authority: CN
Inventors: 李新彩; 苟伟; 赵亚军; 杨玲
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-08-06
Filing date: 2015-08-06
Publication date: 2021-09-03
Anticipated expiration: 2035-08-06
Also published as: CN106455087A; WO2017020684A1

Abstract

The invention provides a method and a device for determining competition resources, wherein the method comprises the following steps: the device determines or adjusts a frequency domain position or a frequency domain range of a CCA (clear channel assessment) of resource competition according to preset parameters and predefined rules, wherein the frequency domain position or the frequency domain range belongs to a part of system bandwidth on an unlicensed carrier, so that the problems that the CCA detection influences the access performance of the device and the waste of device scheduling resources is easily caused are solved, the access probability of the CCA is improved, and the waste of the scheduling resources is reduced.

Description

Method and device for determining competition resources

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for determining contention resources.

Background

In the Evolution process of Long-Term Evolution (Long-Term Evolution, abbreviated as LTE), LTE Rel-13 release started a research in 9 months 2014, where one important content is that the LTE system uses an unlicensed carrier for operation. The technology enables the LTE system to use the existing unlicensed carrier, greatly improves the potential spectrum resources of the LTE system, and enables the LTE system to obtain lower spectrum cost.

However, LTE uses unlicensed carriers and faces a number of problems, and first, in some countries and regions, there are corresponding regulatory policies for the use of unlicensed spectrum. For example, Before transmitting data using an unlicensed carrier, a device must perform Listen Before Talk (Listen Before Talk, abbreviated as LBT, also called Clear Channel Assessment (CCA)), and only a device with successful LBT can transmit data on the unlicensed carrier.

Currently, in LTE, for uplink data transmission in unlicensed operation, how a User Equipment (User Equipment, UE) performs LBT, especially how to determine a frequency domain position when performing CCA, is not yet determined. If according to the existing CCA detection mechanism, the UE needs to perform CCA detection on the entire system bandwidth before sending uplink data, and after detecting that the full-bandwidth channel is idle, the UE can use the carrier resource, which greatly reduces the probability of UE access or generates a large delay for device access.

In addition, for LTE uplink, when a base station schedules multiple users in the same subframe, the following problems may exist in an unlicensed frequency band: under the condition that users perform LBT (local binary transmission) asynchronization, if a first user which succeeds in competition immediately sends data after CCA (channel clear indication) is finished, other UEs (user equipment) fail to perform full-bandwidth CCA detection on a channel, and resources allocated to other UEs are wasted.

In the related art, there is no specific solution at present for the problem that CCA detection affects the access performance of the device and is likely to cause waste of device scheduling resources.

Disclosure of Invention

The invention provides a method and a device for determining competitive resources, which are used for at least solving the problems that CCA detection in the related technology influences the access performance of equipment and easily causes the waste of equipment scheduling resources.

According to an aspect of the present invention, there is provided a contention resource determining method, including:

the device determines or adjusts a frequency domain position or a frequency domain range of a Clear Channel Assessment (CCA) of resource contention according to preset parameters and a predefined rule, wherein the frequency domain position or the frequency domain range belongs to a part of system bandwidth on an unlicensed carrier.

Further, the preset parameter includes at least one of:

channel quality information, traffic load, a frequency domain position where the device is ready to perform data transmission, resource position indication information in scheduling indication signaling, a frequency domain position of the CCA and a corresponding CCA result for the first N times, and the number of times data is transmitted in the frequency domain position, wherein the CCA result includes at least one of: the method comprises the steps of detecting the detected energy, wherein N is a positive integer, and the detected energy comprises the duration of busy channel, the number of times of busy channel, the duration of idle channel, the number of times of idle channel and the detected energy.

Further, the frequency domain location of the CCA further includes at least one of:

lowest frequency domain position, highest frequency domain position, frequency domain value of offset, virtual bandwidth.

Further, the determining or adjusting the frequency domain location of the CCA includes at least one of:

the received CCA sent by other equipment except the equipment indicates the frequency domain position indicated by the signaling;

scheduling resource positions indicated by the indication signaling, or n subbands covering the scheduling resource positions, or m virtual bandwidths covering the scheduling resource positions, wherein n and m are positive integers respectively;

setting the frequency domain position of CCA as a predefined virtual bandwidth each time, and adjusting the frequency domain position of CCA in the system bandwidth in a mode of sequentially taking turns or frequency hopping;

the frequency domain position of the CCA slides and is continuously adjusted in the system bandwidth;

the frequency domain position of the CCA is a frequency band in which the interference determined according to the channel quality measurement result is less than a predefined threshold.

Further, after the received frequency-domain position indicated by the CCA indication signaling sent by the device other than the device, the determining, by the device, the frequency-domain position of a CCA for resource contention in a Frame-based device (Frame-based Equipment, abbreviated as FBE) includes:

the frequency domain position of the CCA takes the center of the scheduled frequency domain resource as the center, the frequency domain range is m virtual bandwidths or n sub-bands covering the scheduled frequency domain resource, and m and n are positive integers;

predefining to divide the system bandwidth into a plurality of continuous or discontinuous overlapped virtual bandwidth sets, and performing CCA on one or more virtual bandwidths to which scheduling resources belong by equipment;

when the CCA is successful last time and the resource position scheduled this time is still in the coverage of the frequency domain range last time, the frequency domain position of the CCA of the device this time is the same as the last time, and under the condition that the resource position scheduled this time is not in the coverage of the frequency domain range last time, the frequency domain position of the CCA this time slides on the basis of the CCA frequency domain position last time until the frequency domain resource scheduled this time is covered;

and determining the frequency domain position or the frequency domain range of the CCA according to the result of the CCA for the previous N times, wherein N is a positive integer.

Further, after the received frequency-domain location of the CCA indicated by the CCA indication signaling sent by the device other than the device, the determining, by the device, the frequency-domain location of the CCA based on resource contention in a Load-based Equipment (LBE) includes:

the frequency domain location for the initial CCA includes one of: full bandwidth, scheduled resource location, sub-band to which the scheduled resource belongs, predefined virtual bandwidth location to which the scheduled resource belongs, one or more virtual bandwidths centered at the center of the scheduled resource;

and the frequency domain position of each CCA in the extended CCA is adjusted and determined on the basis of the initial CCA or the previous N CCA results according to a predefined rule, wherein N is a positive integer.

Further, the value of the virtual bandwidth comprises at least one of:

and the device except the device covers the minimum system bandwidth value of the scheduling frequency domain resource through a semi-static or dynamically configured value of a high layer or physical signaling.

Further, the adjusting the frequency domain location of the CCA includes at least one of:

adjusting the frequency domain range or bandwidth of CCA by taking the center of scheduling resources or the center of system bandwidth as the center, namely changing the lowest frequency domain position and the highest frequency domain position of CCA at the same time;

keeping the position of the CCA in the lowest frequency domain or the position of the CCA in the highest frequency domain unchanged, and adjusting the frequency domain coverage range of the CCA;

the frequency domain starting position and the ending position or the central position of the CCA are changed, namely the frequency domain position of the CCA slides in the bandwidth, and the frequency domain bandwidth of the CCA is also changed.

Further, the CCA frequency domain position sliding manner includes one of:

each time, the CCA detection is carried out by the granularity of integral multiple of the length of the offset fixed frequency domain, no bandwidth overlapping exists between the frequency domain positions of two CCAs, the CCA starting frequency domain position is adjusted from low to high or the highest frequency domain position is adjusted from high to low, or the CCA detection of different frequency domain positions is carried out according to a frequency hopping mode;

the frequency bands of the CCA are overlapped, and the position of the start frequency domain or the position of the end frequency domain of the CCA are offset by a fixed value.

Further, the predefined rule for CCA frequency domain range or position adjustment comprises one of:

the condition that the result of CCA is satisfied by the device for N accumulated or consecutive times includes at least one of: the idle times reach a predefined threshold value X, the idle duration reaches a predefined threshold value Y, the transmission times of the equipment reach a predefined threshold value T, and the detected energy is lower than a predefined threshold value L;

the frequency domain range or bandwidth of the CCA of the equipment is expanded to be P times of the original frequency domain range or the lowest or highest frequency domain position of the CCA is adjusted, wherein N, X and T are positive integers which are more than or equal to 1, and Y, P and L are positive integers or fractions which are more than or equal to 1.

The condition that the result of the CCA accumulated or continuous M times by the device is satisfied includes at least one of the following: the number of busy times reaches a predefined threshold X ', the duration of the busy time reaches a predefined threshold Y', the transmission number of the equipment is less than a predefined threshold T, and the detected energy is higher than a predefined threshold L;

the frequency domain range of the CCA of the equipment is reduced to 1/K or changed into an initial value, and the lowest or highest frequency domain position of the CCA is changed, wherein M, X 'and T are positive integers which are more than or equal to 1, and Y', K and L are positive integers or fractions which are more than or equal to 1.

Further, the determining or adjusting the frequency domain location occasion of the clear channel assessment CCA for resource contention comprises one of:

multiple CCAs of one LBE of the same equipment; between different LBEs in one or more schedules; a plurality of subframes scheduled under the FBE; when the device needs to traverse the full bandwidth to determine the busy idler domain location.

Further, the method for determining the CCA frequency domain position of the device includes:

when the device continuously schedules a plurality of subframes and the position of frequency domain resources scheduled by each subframe is the same, the device performs CCA on full bandwidth or only scheduled frequency domain resources before the first scheduled subframe is transmitted, and continuously transmits the plurality of subframes after the CCA is successfully transmitted;

when the device schedules a plurality of subframes continuously and the frequency domain resource positions scheduled by the subframes are not identical: performing CCA in one of the following modes;

the first scheduling subframe is a full-bandwidth CCA, and is continuously transmitted on frequency domain resources corresponding to the scheduling indications of the plurality of subframes after the first scheduling subframe is successful;

and performing CCA on the frequency domain resources indicated by the scheduling in each scheduling subframe.

Further, the CCA performed by the device in the CCA frequency domain range includes:

the CCA performed by the device in the CCA frequency domain range comprises CCAs of continuous Resource Blocks (RBs) or subcarriers and CCAs of discontinuous intervals (RBs) or subcarriers;

for CCA of non-contiguous RBs or subcarriers, the energy statistic for CCA is the energy on a single RB or subcarrier.

Further, after the device determines or adjusts the frequency domain position or the frequency domain range of the CCA in resource contention according to preset parameters and predefined rules, the method includes:

and when the device detects that the channel is idle at the CCA frequency domain position, transmitting an occupation signal or user data.

Further, the device transmitting the user data includes:

and the equipment sends data on the resource where the scheduling is located according to the scheduling indication signaling, or the equipment autonomously selects the modulation coding grade to send data on the detected idle resource.

According to another aspect of the present invention, there is also provided a contention resource determining apparatus, including:

the device determines or adjusts a frequency domain position or a frequency domain range of a clear channel assessment CCA for resource contention according to a preset parameter and a predefined rule, where the frequency domain position or the frequency domain range belongs to a part of a system bandwidth on an unlicensed carrier.

Further, the apparatus comprises:

a sending module, configured to send an occupation signal or user data when the device detects that a channel is idle at the frequency domain location of the CCA.

According to the invention, the device determines or adjusts the frequency domain position or the frequency domain range of the CCA of the idle channel assessment of the resource competition according to the preset parameters and the predefined rule, wherein the frequency domain position or the frequency domain range belongs to a part of the system bandwidth on the unlicensed carrier, so that the problems that the CCA detection influences the access performance of the device and easily causes the waste of the device scheduling resources are solved, the access probability of the CCA is improved, and the waste of the scheduling resources is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a first flowchart of a contention resource determining method according to an embodiment of the present invention;

fig. 2 is a flowchart of a contention resource determining method according to an embodiment of the present invention;

fig. 3 is a block diagram of a contention resource determining apparatus according to an embodiment of the present invention;

fig. 4 is a block diagram of a contention resource determining apparatus according to an embodiment of the present invention;

fig. 5 is a schematic diagram of the LBT mechanism of the frame-based device FBE according to the preferred embodiment of the present invention;

fig. 6 is a schematic diagram of the LBT mechanism of a load-based device LBE in accordance with a preferred embodiment of the present invention;

fig. 7 is a schematic diagram illustrating the determination of the frequency domain location of resource contention according to a second preferred embodiment of the present invention;

fig. 8 is a schematic diagram a of a frequency domain position determination manner in two CCA according to a second preferred embodiment of the present invention;

fig. 9 is a schematic diagram b of a frequency domain position determination manner in two CCA according to a second preferred embodiment of the present invention;

fig. 10 is a schematic diagram c illustrating a frequency domain position determination manner in two CCA according to a second preferred embodiment of the present invention;

fig. 11 is a diagram illustrating a first method for adjusting the frequency domain position of resource contention in accordance with a third preferred embodiment of the present invention;

fig. 12 is a schematic diagram illustrating a second method for adjusting the frequency domain position of resource contention in a third embodiment of the present invention;

fig. 13 is a schematic diagram illustrating a third method for adjusting the frequency domain position of resource contention in a third preferred embodiment of the present invention;

fig. 14 is a schematic diagram a of determining the frequency domain position of resource contention in accordance with the fourth preferred embodiment of the present invention;

fig. 15 is a schematic diagram b illustrating the determination of the frequency domain position of resource contention in accordance with the fourth embodiment of the present invention;

fig. 16 is a schematic diagram a of determining the frequency domain location of resource contention in accordance with the fifth preferred embodiment of the present invention;

fig. 17 is a schematic diagram b illustrating the determination of the frequency domain position of resource contention in the fifth embodiment according to the present invention;

fig. 18 is a schematic diagram illustrating frequency domain location determination of resource contention in accordance with a fifth embodiment of the present invention;

fig. 19 is a diagram illustrating a first exemplary determination of the frequency domain location of resource contention in accordance with a sixth embodiment of the present invention;

fig. 20 is a schematic diagram illustrating a second exemplary method for determining the frequency domain location of resource contention according to a sixth embodiment of the present invention;

fig. 21 is a schematic diagram illustrating frequency domain location determination of resource contention in a seventh embodiment according to the present invention;

fig. 22 is a flow chart of an eleventh implementation in accordance with a preferred embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In this embodiment, a contention resource determining method is provided, and fig. 1 is a first flowchart of a contention resource determining method according to an embodiment of the present invention, as shown in fig. 1, the process includes the following steps:

step S102, the device determines or adjusts a frequency domain position or a frequency domain range of the CCA according to preset parameters and predefined rules, wherein the frequency domain position or the frequency domain range belongs to a part of system bandwidth on an unlicensed carrier.

Through the steps, the device determines or adjusts the frequency domain position or the frequency domain range of the CCA according to the preset parameters and the predefined rule, wherein the frequency domain position or the frequency domain range belongs to a part of the system bandwidth on the unlicensed carrier, so that the problems that the CCA detection influences the access performance of the device and the waste of the device scheduling resources is easily caused are solved, the access probability of the CCA is improved, and the waste of the scheduling resources is reduced.

In this embodiment, the preset parameter includes at least one of the following:

channel quality information, traffic load, a frequency domain position where the device is ready to transmit data, resource position indication information in scheduling indication signaling, a frequency domain position of the CCA and a corresponding CCA result for the first N times, and the number of times that data is transmitted at the frequency domain position, wherein the CCA result includes at least one of: the method comprises the steps of detecting the detected energy, wherein N is a positive integer, and the detected energy comprises the duration of busy channel, the number of times of busy channel, the duration of idle channel, the number of times of idle channel and the detected energy.

In this embodiment, the frequency domain position of the CCA further includes at least one of:

In this embodiment, the determining or adjusting the frequency domain location of the CCA includes at least one of:

In this embodiment, after the received frequency-domain position indicated by the CCA indication signaling sent by the device other than the device, the determining, by the device, the frequency-domain position of the CCA of the resource contention in the frame-based device FBE includes:

In this embodiment, after the received frequency-domain position indicated by the CCA indication signaling sent by the device other than the device, the determining, by the device, the frequency-domain position of the CCA based on resource contention in the loaded device LBE includes:

In this embodiment, the value of the virtual bandwidth includes at least one of:

In this embodiment, the frequency-domain position of the CCA is adjusted to include at least one of:

In this embodiment, the CCA frequency domain position sliding manner includes one of the following:

the frequency bands of the CCA overlap, and the start or end frequency domain position of the CCA is offset by a fixed value, such as by N RBs or M subcarriers, or by 1/P of the system bandwidth or virtual bandwidth.

In this embodiment, the predefined rule for CCA frequency domain range or position adjustment includes one of:

In this embodiment, the determining or adjusting the frequency-domain location opportunity of the clear channel assessment CCA for resource contention includes one of:

when the device continuously schedules a plurality of subframes and the position of the frequency domain resource scheduled by each subframe is the same, the device performs CCA on the full-bandwidth or only scheduled frequency domain resource before the first scheduled subframe is transmitted, and continuously transmits the plurality of subframes after the CCA is successfully transmitted.

When the device schedules a plurality of subframes continuously and the frequency domain resource positions scheduled by the subframes are not identical: the CCA is performed in one of the following ways:

In this embodiment, the CCA performed by the device in the CCA frequency domain includes:

the CCA performed by the device in the CCA frequency domain range comprises CCA of continuous Resource Blocks (RB) or subcarriers and CCA of discontinuous intervals (RB) or subcarriers;

Fig. 2 is a flowchart of a contention resource determining method according to an embodiment of the present invention, and as shown in fig. 2, the process includes the following steps:

step S202, the device determines or adjusts the frequency domain position or the frequency domain range of the CCA of the resource competition according to the preset parameters and the predefined rules;

step S204, when the device detects that the channel is clear at the CCA frequency domain position, the device transmits an occupation signal or user data.

Through the steps, after the device determines or adjusts the frequency domain position or the frequency domain range of the CCA of the resource competition according to the preset parameters and the predefined rules, the device sends the occupied signal or the user data when the CCA frequency domain position detects that the channel is idle, the problems that the CCA detection influences the access performance of the device and the waste of the device scheduling resources is easily caused are solved, the access probability of the CCA is improved, and the waste of the scheduling resources is reduced.

In this embodiment, the sending, by the device, the user data includes:

and the equipment transmits data on the resource where the scheduling is positioned according to the scheduling indication signaling, or the equipment autonomously selects a modulation coding grade to transmit data on the detected idle resource.

In this embodiment, a contention resource determining apparatus is further provided, where the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details of the foregoing description are omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 3 is a block diagram of a contention resource determining apparatus according to an embodiment of the present invention, the apparatus is located on a device, and as shown in fig. 3, the apparatus includes:

a determining module 32, configured to determine or adjust a frequency domain position or a frequency domain range of the CCA for clear channel assessment for resource contention according to a preset parameter and a predefined rule, where the frequency domain position or the frequency domain range belongs to a portion of a system bandwidth on an unlicensed carrier.

By the device, the device determines or adjusts the frequency domain position or the frequency domain range of the CCA according to the preset parameters and the predefined rules, wherein the frequency domain position or the frequency domain range belongs to a part of the system bandwidth on the unlicensed carrier, so that the problems that the CCA detection influences the access performance of the device and the waste of the device scheduling resources is easily caused are solved, the access probability of the CCA is improved, and the waste of the scheduling resources is reduced.

Fig. 4 is a block diagram of a contention resource determining apparatus according to an embodiment of the present invention, where the apparatus is located on a device, and as shown in fig. 4, the apparatus includes:

the transmitting module 42 is connected to the determining module 32 of fig. 3, and is configured to transmit an occupation signal or user data when the device detects that the channel is clear at the frequency domain location of the CCA.

By the device, after the device determines or adjusts the frequency domain position or the frequency domain range of the CCA of the resource competition according to the preset parameters and the predefined rules, the device sends the occupied signal or the user data when the CCA frequency domain position detects that the channel is idle, the problems that the CCA detection affects the access performance of the device and the waste of the device scheduling resources is easily caused are solved, the access probability of the CCA is improved, and the waste of the scheduling resources is reduced.

The present invention will now be described with reference to preferred embodiments and examples.

The preferred embodiment of the present invention provides a method for determining contention resources, which comprises the following steps:

first, the device determines a set of unlicensed carriers for resource contention and a frequency-domain location of CCA on each carrier.

And then, the equipment performs CCA on the frequency domain position corresponding to each determined carrier, and if the CCA is successful, the equipment transmits data.

Optionally, the set of unlicensed carriers is determined according to a measurement result of a channel over a period of time.

Preferably, the frequency domain position of each carrier CCA is determined according to at least one of the following parameters:

channel quality information, size of service load, frequency domain position ready for data transmission, scheduling indication signaling, result of last N CCA and frequency domain position.

Specifically, the CCA performed by the device at the determined frequency domain position includes the following steps:

the first method comprises the following steps: the device performs CCA over the full bandwidth.

And the second method comprises the following steps: and the equipment performs CCA at the corresponding resource position according to the CCA indication signaling or the scheduling indication signaling.

And the third is that: the device performs CCA on a predefined virtual bandwidth.

Preferably, the device may perform adjustment of the CCA frequency domain position according to the result of the previous N CCA.

Preferably, when the device receives a scheduling indication signaling uplink grant sent by another device before performing CCA, and when two CCA are not scheduled for the same time or the device performs CCA in an FBE manner, the device determines the frequency domain location of each CCA in the following manner.

The first method is as follows: centering on the center of the scheduled resource, the frequency domain range of the CCA is a virtual bandwidth capable of including the scheduled frequency domain resource, and the size of the virtual bandwidth is a predefined value.

The second method comprises the following steps: the system bandwidth is predefined to be divided into several continuous or discontinuous overlapping virtual bandwidth sets, and then the UE performs CCA on one or more virtual bandwidths to which the scheduling resources belong.

The third method comprises the following steps: when the CCA is successful last time and the resource position scheduled this time is still in the coverage of the frequency domain range last time, the frequency domain position of the CCA of the equipment this time is the same as the last time, otherwise, the frequency domain position of the CCA of this time slides on the basis of the frequency domain position of the CCA last time until the frequency domain resource scheduled this time is covered.

The virtual bandwidth is a value configured by other devices through signaling semi-statically or dynamically, or a minimum system bandwidth value covering the scheduling frequency domain resource.

When the device performs CCA in an LBE manner, the device adjusts the frequency domain position and the range according to the rule and the previous CCA result every time the device performs CCA, and the adjusted parameters include the starting frequency domain position, the ending frequency domain position, the central frequency domain position, the frequency domain range or the virtual bandwidth of the CCA. The following are specific adjustments.

The first method comprises the following steps: and adjusting the frequency domain range of the CCA by taking the center of the scheduled frequency domain resource or the center of the system bandwidth as the center.

And the second method comprises the following steps: and the scheduled minimum frequency domain position or the scheduled highest frequency domain position is unchanged, and the frequency domain range of the CCA is adjusted.

And the third is that: the frequency domain starting and ending or center positions of the CCA change, but the range still covers the scheduled resources.

Preferably, when the device accumulates or continuously detects the CCA for N (N is an integer greater than or equal to 1) times and satisfies the adjustment criterion, the frequency domain range of the CCA is expanded to K times or reduced to 1/T.

Preferably, the adjusting means comprises: the length or number of times the channel is idle, the amount of energy detected by the CCA, and the number of data transmissions.

Optionally, the device may further determine different CCA frequency domain positions according to a scheduling scenario:

when the UE is scheduled to continuously transmit a plurality of subframes and the scheduling resource position of each subframe is the same, the UE performs CCA on the full bandwidth or scheduling-only resource before the first scheduling subframe is transmitted, and continuously transmits the plurality of subframes after the CCA is successfully performed.

When the resource positions of a plurality of subframes of the scheduling UE are different: CCA is used in one of the following ways:

the first method is as follows: the first scheduled subframe is full bandwidth, subsequent CCA direct continuous transmission is no longer needed,

the second method comprises the following steps: each scheduling subframe needs to be CCA-scheduled on the scheduling resource.

When the UE is scheduled to be discontinuous subframes, the UE performs CCA on the frequency domain resource scheduled by each subframe.

Preferably, the scheduled frequency domain resource is one or more non-consecutive clusters with RB or subcarrier as a scheduling unit.

When the resource allocated by the UE in a subframe is a plurality of discontinuous clusters, the UE performs CCA on the allocated RB or subcarrier, or the UE performs CCA on n continuous or discontinuous subbands to which the allocated RB or subcarrier belongs, or performs CCA on m virtual bandwidths to which the allocated resource belongs.

When the device does not receive the scheduling signaling or the CCA indication signaling and actively selects the frequency domain position for CCA, the CCA frequency domain position adopts a mode that the frequency domain range of each detection is unchanged and the frequency domain starting position slides in the system bandwidth.

For example, CCA detection is performed at a granularity of 5M each time or the granularity of previously scheduled frequency domain resources, and the CCA detection is slid within the system bandwidth, specifically, the following two ways are used.

The first method comprises the following steps:

each time, the CCA detection is carried out by the granularity of integral multiple of the offset fixed frequency domain window length, the two times are not overlapped, the CCA starting position can be sequentially increased from low to high, or the CCA detection of different frequency domain positions is carried out according to a frequency hopping mode.

And the second method comprises the following steps: the frequency bands of the two times may overlap, and the starting frequency domain position of the CCA is shifted by a fixed value, such as by N RBs or M subcarriers or by 1/X of the sliding window length.

When the device finds the idle resource, it immediately sends the occupation signal, which includes the user data, the measurement reference signal, the preamble sequence, the demodulation reference signal, and the synchronous signal.

Or after the device succeeds in the corresponding frequency domain position CCA, directly transmitting user data, wherein the data transmission method comprises the following steps:

and when the UE detects that the frequency domain position corresponding to the scheduling resource is idle, the UE transmits uplink data on the scheduled RB according to the scheduling indication signaling.

If the idle frequency domain position is detected not to be the resource scheduled by the base station in advance, and the idle time of the position exceeds the predefined time length, the UE can adopt an autonomous transmission mode to perform data transmission on the idle resource.

Preferred embodiment 1

The preferred embodiment briefly introduces the LBT method of a station (including a base station, User Equipment (UE), a home base station, and a relay station) based on Frame-based Equipment (FBE) and the LBT method of Load-based Equipment (LBE).

Fig. 5 is a schematic diagram of an LBT mechanism of a frame-based device FBE according to a preferred embodiment of the present invention, as shown in fig. 5, the FBE has a fixed transmission frame structure, a channel occupation time and an idle period constitute a fixed frame period, the device performs CCA detection in the idle period, when it is detected that a channel is idle, data transmission may be performed immediately, otherwise, CCA detection is performed again in the idle period of the next fixed frame period. For the european FBE, the channel occupancy time is 1ms to 10ms and the idle period is at least 5% of the channel occupancy time. The CCA detection is at least 20 μ s in duration, and may be based on energy detection or signal detection.

Fig. 6 is a schematic diagram of the LBT mechanism of a load-based device LBE according to a preferred embodiment of the present invention, as shown in fig. 6, for LBE, load-based contention. That is, when there is a need for data transmission, the device starts to perform CCA detection, and if the channel is found to be idle after the CCA detection is performed, data transmission may be performed immediately, and the maximum time that the data transmission may occupy is (13/32) × q ms, where q ═ 4,5,6 … 31,32} is configurable; otherwise, if the channel is found to be busy, an extended CCA (ecca) detection period is entered, that is, X CCA detections are performed, and the value of X is stored in a counter, where the value of X is randomly selected from 1 to q, which is called a random backoff value. Every CCA detection (same time for every CCA detection) the counter starts to decrement if the channel is found to be clear, the counter does not decrement if the channel is not clear, and when the counter is decremented to 0, data transmission can start, the data transmission time being determined by the requirements but not exceeding (13/32) × q ms at maximum.

Preferred embodiment two

The preferred embodiment describes the frequency domain position determining and adjusting method in the process of performing CCA each time by the UE in an FBE mode.

For FBE manner, the UE performs LBT as described in the first preferred embodiment, that is, performing initial CCA only once per frame period, for example, if the frame period is 1ms, the UE may perform CCA in every subframe. For a service with a higher priority, such as a retransmission service or feeding back related information, or when the base station schedules multiple UEs to multiplex and transmit in the same subframe, or the UE finds that the scheduled RB is smaller than the uplink bandwidth, the LBT method is preferably adopted.

In this way, the starting time domain position of the UE performing CCA is a predefined value, and is located at the ion frame boundary at the end of the subframe for a duration of CCA, or starts from the starting symbol of the subframe, and performs a length of CCA. The CCA has a time domain length of 34 microseconds, or 20 microseconds, or 10 microseconds or 9 microseconds.

In the frequency domain, the CCA is performed by the UE in the following frequency domain ranges:

the first method is as follows: the UE performs CCA over the entire system bandwidth.

The second method comprises the following steps: the UE CCA only on the scheduled resources.

The third method comprises the following steps: the UE is centered at the center of the scheduled resource, the frequency domain range of the CCA is a virtual bandwidth capable of including the scheduled frequency domain resource, the size of the virtual bandwidth is a predefined value, such as 5M, 10M, 15M, or 20M, or L sub-bands, or the virtual bandwidth is a value that the base station indicates semi-statically or dynamically through signaling.

Fig. 7 is a schematic diagram of determining a resource contention frequency domain position according to a second preferred embodiment of the present invention, as shown in fig. 7, when an RB index where a certain UE is scheduled is 26 to 35, a frequency domain range in which the UE performs CCA is centered on a center of a 30 th RB, and a virtual bandwidth is 5M, that is, a minimum system bandwidth value covering a scheduled frequency domain resource preferentially or a value configured by a base station to the UE through RRC signaling or DCI signaling.

And if the UE successfully performs CCA at the corresponding time-frequency domain position of the scheduling subframe, the UE transmits data on the scheduled RB resource according to the base station scheduling signaling.

If the UE continuously schedules a plurality of subframes and the scheduled frequency domain resource location of the next subframe is also within the virtual bandwidth, the UE may continuously transmit the plurality of subframes.

When the UE is scheduled next time, if the last virtual bandwidth includes the resource scheduled by the UE this time, the UE may perform CCA detection in the frequency domain position corresponding to the last time according to the previous virtual bandwidth, and may perform data transmission if the UE is idle.

Or, if the virtual bandwidth of the CCA last time does not include the frequency domain resource scheduled by the UE this time, the UE may perform an offset on the basis of the original frequency domain location, the offset location still includes the RB scheduled this time, and the frequency domain range of the CCA is still the predefined or signaled virtual bandwidth, such as 5M.

as shown in fig. 8, 9 and 10, the RB index of the scheduling for the nth subframe by the UE is 26 to 35, the frequency domain range of CCA performed by the UE is a system bandwidth value 5M with the RB with the index of 30 as the center and the frequency domain virtual bandwidth of CCA as the minimum. If the CCA is successful, the UE may perform data transmission. If it fails, data transmission is not possible, or the UE still transmits data at a power below a predefined threshold.

Specifically, if the frequency domain resource scheduled by the UE in the n +1 subframe is still within the previous CCA virtual bandwidth as shown in fig. 8, the CCA frequency domain position of the UE in the n +1 subframe, that is, the 2 nd CCA virtual bandwidth, is not changed.

If the frequency domain resource scheduled by the n +1 subframe is not in the last CCA virtual bandwidth, two options are available:

the first method is as follows: the UE performs offset on the original basis at the CCA position of the n +1 subframe until the scheduled frequency domain position is included, as shown in fig. 9.

In a second manner, when the UE performs CCA in the n +1 subframe, CCA detection in the corresponding virtual bandwidth is performed with the center of the resource scheduled this time as the center, as shown in fig. 10.

Or, when the position difference value of the frequency domain resources scheduled twice is smaller than the predefined threshold, the first mode is adopted, and when the position difference value is larger than the predefined threshold, the second mode is adopted.

Or, when the first detection result is idle, the first mode is adopted, and when the first detection result is busy, the second mode is adopted.

It can be seen from the preferred embodiment that, when the UE performs CCA in one virtual bandwidth, the probability of success can be improved to a certain extent compared with performing CCA in the entire system bandwidth. In addition, the result of the CCA of the subframe previously scheduled by the UE can provide reference for the frequency domain position of the subframe, and the success probability of the CCA is further improved.

Preferred embodiment three

The preferred embodiment explains the implementation process of the CCA frequency domain position determining and adjusting method provided by the present invention when the scheduling UE performs CCA in the LBE LBT mode.

The specific procedure of LBE is as described in the first implementation, and the CCA procedure before data transmission includes multiple CCA. According to the invention, the frequency domain position of the plurality of CCAs can be adjusted according to a rule or a detection result. The specific process is as follows:

the UE firstly carries out the CCA for the first time at the position of the scheduled frequency domain resource or carries out the CCA of the virtual bandwidth frequency domain range by taking the center of the scheduled resource as the center. The CCA may have a time domain length of 34 microseconds, or 20 microseconds.

If successful, the CCA of the second time still adopts the same CCA frequency domain range as the first time until the value of N is reduced to 0 before the data transmission timing, and the data is transmitted at the data timing moment.

Or when the result of CCA satisfies the adjustment condition, for example, when the number of successful times reaches a predefined threshold, for example, the predefined threshold is 2, the UE may expand the CCA frequency domain range, specifically, there are the following two expansion manners:

the first method comprises the following steps: the frequency domain starting position of CCA is not changed, and the frequency domain range is performed according to a certain agreed value, such as doubling the frequency domain range, or each time, N RBs or subcarriers are expanded, and the N value is 2,5,6,8,15, etc.

Alternatively, several levels are classified according to the detected condition.

The expanded number of RBs is n1 when the detected energy threshold is less than the predefined threshold one and n2 when the detected energy threshold is less than the predefined threshold two.

Or when the idle time or the idle time reaches a predefined threshold of one, the expanded number of RBs is n1, and when the idle time or the idle time is less than a predefined threshold of two, the expanded number of RBs is n 2.

Or the UE adjusts the frequency domain position according to the indication signaling sent by the base station.

Or the UE adjusts according to the number of transmissions.

And the second method comprises the following steps: the center frequency domain of the CCA is the center of the scheduled resource or the center of the system bandwidth is the center of the system bandwidth, and the frequency domain range expansion is also performed according to the agreed value or the agreed rule as described above, fig. 11 is a schematic diagram of a resource contention frequency domain position adjustment manner in a third preferred embodiment of the present invention, as shown in fig. 11.

And the third is that: the frequency domain starting position or the center frequency domain position and the range of the CCA are changed, but the frequency domain range of the CCA always contains the scheduled resources. Fig. 12 is a schematic diagram illustrating a second method for adjusting the frequency domain position of resource contention in a third preferred embodiment of the present invention, as shown in fig. 12.

Conversely, when the UE performs the initial CCA or the extended CCA detection result in the full bandwidth or the virtual bandwidth and meets a certain condition, the frequency domain range and/or the position of the subsequent CCA may be adjusted or reduced according to the result related to the last CCA.

For example, the UE may adjust the CCA frequency domain range according to the detected energy, or the number of times that CCA is accumulated and failed, or the duration of busy, or the base station signaling indication.

The adjustment method for reducing the frequency domain range of the CCA still can be the above three types:

the first method comprises the following steps: taking the center of the scheduled resource or the center of the system bandwidth as the center, reducing the frequency domain range of the CCA by a certain length, fig. 13 is a schematic diagram of a third resource contention frequency domain position adjustment manner in a third preferred embodiment of the present invention, as shown in fig. 13.

And the second method comprises the following steps: and the scheduled minimum frequency domain position or the scheduled highest frequency domain position is unchanged, and the frequency domain range of the CCA is narrowed.

By continuously adjusting the frequency domain range of the CCA of the UE, the success probability of the LBE can be improved, and the waste of resources is reduced.

Preferred embodiment four

The preferred embodiment describes a specific method for bandwidth extension of UE CCA (such as mentioned in the preferred embodiment three).

When the detection result of the CCA of the UE N times (N is an integer more than or equal to 1) meets the adjustment basis, the frequency domain range of the CCA is expanded to be K times of the original frequency domain range. The adjusting basis comprises one of the following conditions:

the first condition is as follows: the number of idleness reaches a predefined threshold value X,

and a second condition: the length of time of the idle reaches a predefined threshold Y,

and (3) carrying out a third condition: the number of UE transmissions reaches a predefined threshold T,

and a fourth condition: the detected energy is below a predefined threshold L.

There are three specific ways to expand:

the first method comprises the following steps: as shown in fig. 11. By taking the center of scheduling resources or the center of system bandwidth as a center, the CCABW is expanded to be K times of the original CCABW, K is a positive integer greater than 1 or is a fraction, and the maximum value cannot exceed the system bandwidth.

And the second method comprises the following steps: the CCA starting low-frequency domain position is unchanged, and the CCA ending frequency domain position is changed. The whole bandwidth is expanded to K times of the original bandwidth, namely, the bandwidth is changed to a high frequency domain position. Fig. 14 is a schematic diagram a of determining the frequency domain position of resource contention in accordance with the fourth preferred embodiment of the present invention, as shown in fig. 14.

Alternatively, the location of the termination of the CCA in the high frequency domain is unchanged and the location of the termination in the low frequency domain is changed. The overall bandwidth is expanded to K times the original, i.e. shifted to a lower frequency domain position. Fig. 15 is a schematic diagram b of determining the frequency domain position of resource contention in accordance with the fourth preferred embodiment of the present invention, as shown in fig. 15.

And the third is that: the center, the start frequency domain position, and the end frequency domain position of the CCA are all changed, the overall bandwidth is expanded to K times of the original bandwidth, and the CCA range always covers the scheduled resources, as shown in fig. 11.

The adjustment method for expanding the CCA frequency domain range can be used for adjusting next scheduling among multiple scheduling according to the result of the last scheduling of CCA besides multiple CCAs of one scheduling of LBE. The same applies to FBE if the frequency domain positions of the scheduled multiple subframes are the same.

Preferred embodiment five

The preferred embodiment describes a specific method of CCA bandwidth reduction (such as mentioned in the preferred embodiment three).

When the detection result of the CCA of the UE N times (N is an integer which is more than or equal to 1) meets the basis of adjustment, the frequency domain range of the CCA is reduced to the previous 1/K. The adjusting basis comprises one of the following conditions:

the first condition is as follows: the number of busy times reaches a predefined threshold X',

and a second condition: the duration of the busy reaches a predefined threshold Y',

and (3) carrying out a third condition: the number of UE transmissions is less than a predefined threshold T,

and a fourth condition: the detected energy is above a predefined threshold L.

There are three specific ways to reduce this:

the first method comprises the following steps: as shown in fig. 12. And taking the center of the scheduled frequency domain resource or the center of the system bandwidth as the center, reducing the CCABW to be 1/K of the original value, wherein K is a positive integer larger than 1 or a fraction, or returning to the scheduled RB frequency domain position. And the minimum CCA frequency domain bandwidth cannot be less than one RB or scheduled RB or subcarrier.

And the second method comprises the following steps: the starting low frequency domain position of the CCA is unchanged and the ending frequency domain position is changed. The whole bandwidth is reduced to 1/K. Fig. 16 is a schematic diagram a of determining the frequency domain position of resource contention according to a fifth embodiment of the present invention, as shown in fig. 16.

Alternatively, the location of the termination of the CCA in the high frequency domain is unchanged and the location of the termination in the low frequency domain is changed. The whole bandwidth is reduced to 1/K. Fig. 17 is a schematic diagram b of determining the frequency domain position of resource contention in accordance with the preferred embodiment of the present invention, as shown in fig. 17.

And the third is that: the center of CCA, the initial frequency domain position and the ending frequency domain position are all changed, the whole bandwidth is reduced to 1/K, and the frequency domain range still covers all the dispatched RBs. Fig. 18 is a schematic diagram of determining a frequency domain position of resource contention in accordance with a fifth preferred embodiment of the present invention, as shown in fig. 18.

Similarly, the CCA frequency domain range reduction adjustment method may be used not only for multiple CCA of one scheduling of LBE, but also for adjustment of next scheduling between multiple scheduling according to the result of CCA scheduled last time. The same applies to FBE if the frequency domain RB locations of the scheduled multiple subframes are the same.

Preferred embodiment six

The above preferred embodiments are all described in the method for determining and adjusting the CCA frequency domain position when the UE performs CCA after receiving the base station scheduling indication signaling or the CCA detection indication signaling. The preferred embodiment explains the frequency domain position adjustment method when the UE does not receive the scheduling signaling or the CCA indication signaling to perform CCA detection.

At this time, when the UE performs CCA, a mode that the frequency domain range of each detection is unchanged and the frequency domain starting position is changed may also be adopted.

The first method comprises the following steps:

each time, the CCA detection is carried out by the granularity of integral multiple of the offset fixed frequency domain window length, the two times are not overlapped, the CCA starting position can be sequentially increased from low to high, or the CCA detection of different frequency domain positions is carried out according to a frequency hopping mode. Fig. 19 is a schematic diagram illustrating a first exemplary embodiment of determining the frequency domain location of resource contention according to the sixth embodiment of the present invention, as shown in fig. 19.

And the second method comprises the following steps: the frequency bands of the two times may overlap, the starting frequency domain position of the CCA is shifted by a fixed value, for example, by N RBs, where N may be 2,3,4 …, and the maximum frequency domain position preferably does not exceed the boundary of the bandwidth. Fig. 20 is a schematic diagram illustrating a second exemplary embodiment of determining the frequency domain position of resource contention according to the sixth embodiment of the present invention, as shown in fig. 20.

When the idle resources are found, the UE immediately reports to the base station through the authorized carrier, and simultaneously sends an occupation signal.

The method is mainly used for the situation that the UE actively performs CCA and then feeds back the frequency domain position found to be idle or busy to the base station, and the base station performs uplink scheduling and resource allocation on the UE based on the result. Or the method is used for assisting the base station to select the carrier by the UE, and when the UE finds the idle carrier, the idle carrier is reported to the base station, and the base station can use the carrier for downlink or uplink.

Preferred embodiment seven

Besides the UE determines and adjusts the CCA frequency domain position according to the rule, the CCA frequency domain position can also be described by a predefined and scheduled RB joint determination method.

For example, the system bandwidth is predefined to be divided into several continuous or non-continuous overlapping virtual bandwidth sets, and then the UE performs CCA on one or more virtual bandwidths to which the scheduled frequency domain resources belong.

Fig. 21 is a schematic diagram illustrating the determination of the frequency domain location of resource contention in the seventh embodiment of the present invention, as shown in fig. 21, for the right graph, assuming that the system bandwidth is 20M, if the predefined virtual bandwidth is 5M, the system bandwidth may be divided into 4. If the virtual bandwidth is 10M, it can be divided into 2. And when the base station schedules, one UE is scheduled in one virtual bandwidth as far as possible, so that the condition of cross-virtual bandwidth scheduling is avoided. Thus, each UE has a unique virtual bandwidth corresponding to each scheduling.

Or the system bandwidth is divided into several overlapping sets of virtual system bandwidths, as shown in the left side of fig. 21, assuming that the 20M system bandwidth is divided into five different sets of virtual bandwidths, each 5M, a, B, C, D, E, there may be an intersection in the frequency domain between two adjacent sets, that is, some RBs may belong to two different sets of virtual bandwidths simultaneously.

Assuming that an RB scheduled by a certain UE is a frequency domain position of a shaded portion in fig. 21, if the RB is divided according to the right virtual bandwidth, the UE can only perform CCA according to the virtual bandwidth occupied by the set a to which the scheduled frequency domain resource belongs. If the division manner of the virtual bandwidth shown in the left diagram is adopted, the UE may use the set a as the frequency domain position of the CCA, or may use the set B as the frequency domain position of the CCA, and if the UE does not perform the CCA in the set a, it may be successful in the set B, so that the uplink data may be transmitted.

By the method, the success probability of the CCA of the UE can be improved, and the waste of scheduling resources is reduced.

Preferred embodiment eight

For uplink, when the base station schedules or allocates resources, the resource is allocated continuously or discontinuously in units of RBs or subcarriers. For the case that the RB or subcarrier resources allocated by the UE are continuous, the result of CCA detection is averaged in units of the entire scheduled frequency domain bandwidth, that is, the statistical object is the entire resource bandwidth.

If the RB resource allocated by the UE is a discontinuous RB or subcarrier, for example, m RBs or p subcarriers are allocated to the same UE every n RBs or l subcarriers, and at this time, the frequency domain position of the UE CCA has three modes:

the first method is as follows: CCA is only carried out on the scheduled discontinuous RB or subcarrier, and the UE CCA energy detection result is averaged by taking each scheduled discontinuous RB or subcarrier as a unit.

The second method comprises the following steps: CCA is carried out on N virtual bandwidths covering all discontinuous RBs or subcarriers, and the CCA detection result is obtained by taking each virtual bandwidth as a statistical object to carry out average judgment.

The third method comprises the following steps: CCA is carried out on M sub-bands to which the scheduled frequency domain resources belong, and CCA result judgment takes each sub-band as a unit.

Through the mode, the probability of successful CCA detection can be improved, the UE can be rapidly accessed to the scheduled carrier, and the waste of resources is avoided.

Preferred embodiment nine

When the CCA detection result of the UE is idle in the corresponding virtual bandwidth or in the frequency domain, the method for subsequent data transmission includes:

and if the UE receives the scheduling indication signaling of the subframe before the CCA, when the UE detects that the frequency domain position corresponding to the scheduling resource is idle, the UE transmits uplink data on the scheduling resource according to the scheduling indication signaling.

If the idle frequency domain position is detected not to be the resource scheduled by the base station in advance, and the idle time of the position exceeds the predefined time length, the UE can adopt an autonomous transmission mode to perform data transmission on the idle resource. The specific MCS and TB block size is selected in a conservative mode, MCS information and data are jointly coded and transmitted, or offset information of MCS or RB in the last scheduling is given, and the data coding modulation and resource position information which is not given shows that the data coding modulation and the resource position information are consistent with the last information.

Or the UE firstly sends an occupation signal on the resource and informs the base station of the detected idle resource, and the base station schedules other users or the UE to carry out uplink data transmission on the resource.

Specifically, for example, the base station sends an indication signaling to the UE geographically close to the UE and scheduled in the subframe, so that the UE sends data on the idle resources. Or the base station sends scheduling indication information to the UE, and the UE transmits uplink data in the next subframe after receiving the information.

Preferred embodiment ten

The preferred embodiment explains the mutual information between the base station and the UE in the resource competition.

First, before performing resource contention, the UE receives indication information and/or scheduling transmission information of contention on the unlicensed carrier, which is sent by the base station.

The resource contention CCA related parameters include: the starting position of the CCA, the backoff value N, and the window length.

The transmission parameters comprise carrier index information of an unauthorized carrier, subframe position index information of the UE for data transmission on the unauthorized carrier, the position and the number of physical resources allocated to each subframe, a modulation and coding strategy MCS, and a hybrid automatic repeat request HARQ process number.

When the UE is scheduled to multiple subframes, the parameters of the subframes may be completely the same or partially the same, for example, there may be the same frequency domain resource location, or the frequency domain resource location may be different on each subframe.

The UE adopts different CCA frequency domain granularities according to a scheduling scene:

when the UE is scheduled to continuously transmit a plurality of subframes and the frequency domain resource position of each subframe is the same, preferably, the UE performs CCA on the full bandwidth or only the scheduled frequency domain resource before the first scheduled subframe is transmitted, and continuously transmits the plurality of subframes after the CCA is successfully performed.

When the frequency domain resource positions of a plurality of subframes of the scheduling UE are different: CCA is used in one of the following ways:

the second method comprises the following steps: each scheduling subframe needs to perform CCA on the scheduled frequency domain resources.

Or the UE performs CCA according to the frequency domain position indicated by the base station semi-statically or dynamically.

Then, the UE performs LBT and data transmission according to the received parameters.

Description of the preferred embodiment

The preferred embodiment explains the implementation process of the contention resource determining method provided by the present invention.

Fig. 22 is a flow chart of an eleventh implementation in accordance with a preferred embodiment of the present invention, as shown in fig. 22.

Step S222, the device determines an unlicensed carrier index for performing CCA, where the number of unlicensed carriers may be multiple, that is, the device may perform CCA on multiple unlicensed carriers at the same time;

step S224, the device determines the initial frequency domain position and the frequency domain range or the virtual bandwidth of the CCA on each unauthorized carrier;

the device may determine a starting frequency domain location and frequency domain range or virtual bandwidth of the CCA according to a location at which data transmission is to be performed or a scheduled resource or a result of a previous CCA or a result of channel measurement.

Step S226, the device performs CCA on the determined frequency domain position of the corresponding unlicensed carrier, and if the CCA is successful, transmits data in the corresponding frequency domain position.

The preferred embodiment provides a method for determining a frequency domain position of a contention resource, which solves the problems of how to determine the frequency domain position and realize multi-user frequency multiplexing when an uplink UE performs LBT in a system bandwidth when an LTE system operates in an unlicensed carrier frequency band, improves the probability of user access and the spectrum efficiency, and solves the problem of poor system performance caused by low frequency domain utilization efficiency in the prior art.

The competition resource determining method provided by the invention solves the specific problems of resource competition, data scheduling and transmission when the LTE carries out uplink data transmission on the unauthorized carrier, avoids the problem of resource waste caused by CCA of the equipment in full bandwidth, and improves the probability of accessing the unauthorized carrier and the spectrum efficiency of the equipment. It should be noted that although some embodiments are described by taking a UE as an example, the frequency domain CCA method provided by the present invention is also applicable to other stations or devices, such as a base station or a relay station.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.

The embodiment of the invention also provides a storage medium. Optionally, in this embodiment, the storage medium may be configured to store program codes for executing the method steps of the above embodiment:

optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Optionally, in this embodiment, the processor executes the method steps of the above embodiments according to the program code stored in the storage medium.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for contention resource determination, comprising:

the method comprises the steps that equipment determines or adjusts a frequency domain position or a frequency domain range of a clear channel assessment CCA of resource competition according to preset parameters and a predefined rule, wherein the frequency domain position or the frequency domain range belongs to a part of system bandwidth on an unlicensed carrier;

wherein the preset parameter comprises at least one of:

channel quality information, traffic load, a frequency domain position where the device is ready to perform data transmission, resource position indication information in scheduling indication signaling, a frequency domain position of the CCA and a corresponding CCA result for the first N times, and the number of times data is transmitted in the frequency domain position, wherein the CCA result includes at least one of: the method comprises the steps of detecting the detected energy, wherein N is a positive integer;

wherein the predefined rule for CCA frequency domain range or position adjustment comprises one of:

expanding the frequency domain range or bandwidth of the CCA of the equipment to be P times of the original frequency domain range or adjusting the lowest or highest frequency domain position of the CCA, wherein N, X and T are positive integers which are more than or equal to 1, and Y, P and L are positive integers or fractions which are more than or equal to 1;

2. The method of claim 1, wherein the frequency domain location of the CCA further comprises at least one of:

3. The method of claim 1, wherein the determining or adjusting the frequency domain location of the CCA comprises at least one of:

4. The method of claim 3, wherein the determining, by the device, the frequency-domain location of the CCA for resource contention in the frame-based device FBE, after the received CCA indication signaling from a device other than the device indicates the frequency-domain location, comprises:

5. The method of claim 3, wherein the determining, by the device, the frequency-domain location of the CCA based on contention for resources in a loaded device LBE after the received CCA indication signaling from a device other than the device indicates the frequency-domain location comprises:

6. The method of any one of claims 2 to 5, wherein the value of the virtual bandwidth comprises at least one of:

7. The method of any of claims 1 or 3, wherein the adjusting the frequency domain location of the CCA comprises at least one of:

8. The method of claim 7, wherein the sliding of the CCA frequency domain position comprises one of:

9. The method according to any of claims 1 to 5, wherein the determining or adjusting the frequency domain location occasion for a clear channel assessment, CCA, for resource contention comprises one of:

10. The method of claim 9, wherein the device CCA frequency domain location determination method comprises:

11. The method of claim 9, wherein CCA performed by the device in the CCA frequency domain comprises:

CCA performed by the device in the CCA frequency domain range comprises CCA of continuous Resource Blocks (RB) or subcarriers and CCA of discontinuous intervals (RB) or subcarriers;

12. The method of claim 9, wherein the determining or adjusting the frequency domain position or the frequency domain range of the CCA of resource contention by the device according to a preset parameter and a predefined rule comprises:

13. The method of claim 12, wherein the device transmitting user data comprises:

14. A contention resource determining apparatus, comprising:

the device comprises a determining module, a determining module and a processing module, wherein the determining module is used for determining or adjusting a frequency domain position or a frequency domain range of a Clear Channel Assessment (CCA) of resource competition according to preset parameters and predefined rules, and the frequency domain position or the frequency domain range belongs to a part of system bandwidth on an unlicensed carrier;

wherein the preset parameter comprises at least one of:

15. The apparatus of claim 14, further comprising: