WO2017049719A1

WO2017049719A1 - Channel detection method having defer period, and device

Info

Publication number: WO2017049719A1
Application number: PCT/CN2015/093484
Authority: WO
Inventors: 李明菊; 朱亚军; 张云飞
Original assignee: 宇龙计算机通信科技(深圳)有限公司
Priority date: 2015-09-25
Filing date: 2015-10-31
Publication date: 2017-03-30
Also published as: CN105338651A

Abstract

The present invention provides a channel detection method having a defer period, and a device. The channel detection method having a defer period comprises: when an ECCA detection process is carried out, configuring a defer period process after channel-busy ECCA detection granularities are detected; and in the process of starting the ECCA channel detection process, selecting a random number, and in the subsequent channel detection process, adjusting a value of the random number according to the detection result of each ECCA detection granularity and the detection result of the CCA detection granularity in the defer period process, and until the value of the random number is 0, determining that the ECCA detection process is ended. In the technical solution of the present invention, a method of progressively-decreasing a value of a random number N in an ECCA detection process having a defer period is specified, and a method for counting channel busy and idle times in the defer period is also specified when an observation window has the defer period process, so as to adjust a value of a contention window.

Description

Channel detection method and device configured with defer period

Technical field

The present invention relates to the field of communications technologies, and in particular, to a channel detection method configured with a defer period and a channel detection apparatus configured with a defer period.

Background technique

Currently, 3GPP proposes the concept of LAA (LTE Assisted Access) for using unlicensed spectrum with the help of LTE licensed spectrum. One of the key points in the use of unlicensed bands in LTE (Long Term Evolution) networks is to ensure that LAA 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 (Listen Before Talk) mechanism to avoid collision. In order to coexist better with Wi-Fi, the LTE system needs an LBT mechanism. In this way, if the LTE detects that the channel is busy on the unlicensed spectrum, the LTE cannot occupy the frequency band, and if the channel is detected to be idle, it can be occupied.

Based on the above problems, an LBT mechanism based on LBE (Load based equipment) is proposed in the related art, as shown in FIG. 1. The LBT-based LBT mechanism is cycle-free, and CCA is triggered as long as the service arrives. Detection, if the CCA detection is idle, immediately send signaling or data; if the channel is detected to be busy, take a random number N, N ranges from 1 to q, where q is the length of the contention window, and its value The range is 4 to 32. Fig. 1 shows the case of q = 16, in which case, when the channel is detected to be idle, the channel maximum occupation time is (13/32) × q = 6.5 ms. After 6.5ms, the ECCA (Extended CCA) mechanism is adopted, that is, the random value N, N ranges from 1 to q. If the value is 8, it means that in the next consecutive CCA detection time, each The channel is detected at the CCA detection time. If the channel is detected to be idle, N-1, if the channel is detected to be busy, N is unchanged, and when N is 0, signaling or data is transmitted.

In addition, in order to further maintain fairness with Wi-Fi, LBE adopts different ICCA (initial CCA) and ECCA values, where the first CCA test is called ICCA, and the time granularity is relatively large, such as 34us; when the channel busy is detected or the channel occupancy time is cut off, the time granularity of the ECCA is relatively small, such as 9us. . Meanwhile, as shown in FIG. 2, in the channel detection, if the channel is detected to be busy, a defer period is added, and the value of the defer period is equivalent to the value of the initial CCA, that is, it must be long time again. It is detected that the channel is idle before continuing N-1.

In fact, the specific length of the defer period process and the ECCA process are not fixed, because during the defer period, before the channel idle duration reaches the defer period, there may be a channel busy or the channel idle duration is shorter than the defer period duration. At the time, these are all in the defer period. Similarly, in ECCA, before detecting N idle ECCA slots (granularity), it is possible to detect a busy ECCA slot and a process of defer period when busy is detected, so the length of the ECCA process is also not fixed. of.

Since each packet arrives at a certain size, and generally requires multiple maximum channel occupation times to be transmitted. As shown in Figure 3, when the first packet comes, that is, the data in the buffer is from no time to time, the initial contention window size in the first LBE-based channel competition process is set. An explicit method, and after the end of the first channel occupation time, how the contention window in the second channel competition is adjusted based on the initial contention window and the current state of the channel (such as HARQ feedback or channel detection result of the eNB), etc. The method is also uncertain.

In view of the above problems, the related art proposes that the channel state can be detected based on a period of observation time (such as setting an observation window), and then the size of the contention window is determined according to the number of busy channels in the observation window or the ratio of busy channels. Value or adjustment value. For the process of the defer period in the observation window, there is no clear way to count the number of busy and idle channels in the defer period.

At the same time, how the channel detection busy and idle times in the defer period is calculated in the channel idle times or the channel busy times, in order to clarify the decrement of the random number N value in the ECCA process, and there is currently no clear method.

Summary of the invention

The present invention is based on at least one of the above technical problems, and proposes a new channel detection scheme configured with a defer period, which can clarify a method for decrementing a random number N value in an ECCA detection process in which a defer period is configured.

In view of this, according to the first aspect of the present invention, a channel detection method configured with a defer period is provided, including: configuring a defer period process after detecting an ECCA detection granularity of a channel busy when performing an ECCA detection process; When the ECCA channel detection process is started, the random number is selected, and in the subsequent channel detection process, the value of the random number is adjusted according to the detection result of each ECCA detection granularity and the detection result of the CCA detection granularity in the defer period process. Until the value of the random number is 0, it is determined that the ECCA detection process ends.

According to the second aspect of the present invention, a channel detecting apparatus configured with a defer period is further provided, comprising: a configuration unit, configured to configure a defer period process after detecting an ECCA detection granularity of a channel busy when performing an ECCA detection process a processing unit, configured to: when the ECCA channel detection process is turned on, select a random number, and in the subsequent channel detection process, according to the detection result of each ECCA detection granularity and the detection result of the CCA detection granularity in the defer period process The value of the random number is adjusted until the value of the random number is 0, and it is determined that the ECCA detection process ends.

In the above technical solution, since the defer period process is added in the ECCA process, the present invention proposes a technique for adjusting the random number according to the detection result of each ECCA detection granularity and the detection result of the CCA detection granularity in the defer period process. The scheme proposes to calculate the detection result of the CCA detection granularity in the defer period process in the channel idle number or the channel busy number, and clarifies the method for decreasing the random number N value in the ECCA process.

DRAWINGS

FIG. 1 is a schematic diagram showing a frame structure of an LBT-based LBT mechanism;

2 shows a schematic diagram of a frame structure of an LBE mechanism including a defer period process;

Figure 3 shows a schematic diagram of adjusting the size of the contention window;

FIG. 4 illustrates a channel detector configured with a defer period according to an embodiment of the present invention. Schematic flow chart of the law;

FIG. 5 shows a schematic block diagram of a channel detecting apparatus configured with a defer period according to an embodiment of the present invention; FIG.

Figure 6 shows a schematic block diagram of a base station in accordance with an embodiment of the present invention;

Figure 7 shows a schematic block diagram of a terminal in accordance with an embodiment of the present invention.

detailed description

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

In the following description, numerous specific details are set forth in order to provide a full understanding of the invention, but the invention may be practiced otherwise than as described herein. Limitations of the embodiments.

FIG. 4 shows a schematic flow chart of a channel detection method configured with a defer period, in accordance with an embodiment of the present invention.

As shown in FIG. 4, a channel detection method configured with a defer period according to an embodiment of the present invention includes:

Step 402: When performing the ECCA detection process, configuring a defer period process after detecting a channel busy ECCA detection granularity;

Step 404: When the ECCA channel detection process is started, the random number is selected, and in the subsequent channel detection process, the detection result according to each ECCA detection granularity and the detection result of the CCA detection granularity in the defer period process are adjusted. The value of the random number until the value of the random number is 0, it is determined that the ECCA detection process ends.

In this technical solution, since the defer period process is added in the ECCA process, the present invention proposes a technique for adjusting the random number according to the detection result of each ECCA detection granularity and the detection result of the CCA detection granularity in the defer period process. The scheme proposes to calculate the detection result of the CCA detection granularity in the defer period process in the channel idle number or the channel busy number, and clarifies the method for decreasing the random number N value in the ECCA process.

In the above technical solution, preferably, the detection knot of the granularity is detected according to each of the ECCAs. The step of adjusting the value of the random number specifically includes: if any ECCA detection granularity detects that the channel is busy, the value of the random number is unchanged; if the ECCA detection granularity other than any defer period process detects the channel idle , the value of the random number is decremented by one.

In any one of the foregoing technical solutions, the step of adjusting the value of the random number according to the detection result of the CCA detection granularity in the defer period process specifically includes:

Subtracting the value of the random number by one at the end of any of the defer period processes; or

At the end of any of the defer period processes, the number of ECCA detection granularities in the value of the defer period is taken as a value of the random number reduction; or

At the end of any of the defer period processes, the number of ECCA detection granularities in which the channel idle is detected in the defer period detection process is taken as the value of the random number reduction.

In any one of the foregoing technical solutions, preferably, before performing the ECCA detection process, the method further includes: setting an observation window for detecting a channel, and detecting, by using the observation window, a state of the channel; Observing the state of the channel detected by the window, determining a value of the contention window; and selecting the random number according to the value of the contention window.

In this technical solution, the channel state is detected by setting an observation window to determine the value of the contention window according to the detected channel state, so that the value of the set contention window can be adapted to the change of the channel state, and further The ability to select a suitable random number avoids collisions caused by too small a value of the contention window, and also avoids the problem of increasing the transmission delay due to the excessive value of the contention window, which is beneficial to improving channel utilization and system throughput.

In any one of the foregoing technical solutions, preferably, the step of determining a value of the contention window based on the state of the channel detected by the observation window comprises: determining, according to a state of the channel detected by the observation window, An indicator for indicating the channel state, determining a value of the contention window according to the indicator; wherein, the value of the indicator is based on a number of detection granularities of detecting channel idleness in the observation window, and/or It is determined based on the number of detected granularity of channel busy detected in the observation window.

In the technical solution, the solution for determining the value of the contention window according to the foregoing indicator is specifically: pre-storing the correspondence between the index and the value of the contention window, and further determining the value of the corresponding contention window according to the foregoing indicator; or according to the value of the indicator Adjusting the value of the contention window with the set threshold value. If the value of the indicator is greater than or equal to the first threshold, increase the value of the contention window. Otherwise, Decrease the value of the contention window or set the value of the contention window to the minimum value. When the value of the indicator is less than or equal to the second threshold, the value of the contention window is increased, otherwise the value of the contention window is decreased or the value of the contention window is set to a minimum value.

In any of the above technical solutions, preferably, the defer period process is configured in the observation window,

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by 0; or

Adding 1 to the number of detection granularities of channel idle detected in the observation window at the end of any defer period process in the observation window; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by M, where M is the defer period configured in the observation window. The number of ECCA detection granularities in the value; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by M+1, where M is the value configured in the observation window. The number of ECCA detection granularities in the value of the defer period; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by M+2, where M is the value configured in the observation window. The number of ECCA detection granularities in the value of the defer period; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by A, where A is the defer period configured in the observation window. The number of ECCA detection granularities in which the channel is idle during the process; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is added to A+B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is idle is detected during the defer period, and B is the number of non-ECCA detection granularities in which the channel idleness is detected during the defer period in the observation window; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is added to A+2B, where A is configured in the view The number of ECCA detection granularities in which the channel is idle is detected in the defer period process in the window, and B is the number of non-ECCA detection granularities in which the channel idleness is detected during the defer period in the observation window. .

At the end of any defer period process in the observation window, the number of detected granularity of channel busy detected in the observation window is increased by 0; or

Adding 1 to the number of detection granularities of channel busy detected in the observation window at the end of any defer period process in the observation window; or

At the end of any defer period process in the observation window, the number of detection granularities of channel busy detected in the observation window is increased by A, where A is the defer period configured in the observation window. The number of ECCA detection granularities in which the channel is busy detected during the process; or

At the end of any defer period process in the observation window, the number of detected granularity of channel busy detected in the observation window is added to A+B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is busy is detected during the defer period, and B is the number of non-ECCA detection granularities in which the channel busy is detected during the defer period in the observation window; or

At the end of any defer period process in the observation window, the number of detected granularity of channel busy detected in the observation window is added to A+2B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is busy is detected during the defer period, and B is the number of non-ECCA detection granularities in which the channel busy is detected during the defer period in the observation window.

The following describes the three processes of the defer period proposed by the present invention:

Process one:

In any one of the foregoing technical solutions, the defer period process specifically includes: performing a channel detection process of a first detection granularity; and performing an ECCA detection granularity if the channel detection process of the first detection granularity detects that the channel is idle. Channel detection process; when the channel detection process of the ECCA detection granularity detects that the channel is busy, re-executing the channel detection process of the first detection granularity, and detecting channel idleness in the channel detection process of the ECCA detection granularity When it is determined whether there are M consecutive ECCA detection granularity, the channel detection process detects that the channel is idle; when it is determined that the channel detection process with M consecutive ECCA detection granularities detects that the channel is idle, it is determined that the defer period process ends. Otherwise, the channel detection process of the ECCA detection granularity is continued.

The process is specifically that the channel detection process of one consecutive first detection granularity and the channel detection process of M ECCA detection granularity respectively detect that the channel is idle, so that the end of the defer period process can be determined.

Process two:

In any one of the foregoing technical solutions, the defer period process specifically includes: performing a channel detection process of a first detection granularity; and performing an ECCA detection granularity if the channel detection process of the first detection granularity detects that the channel is idle. Channel detection process; determining whether there are M ECCA detection granularity channel detection processes detect channel idleness; determining that the channel idle state is detected in the channel detection process with M ECCA detection granularity, determining that the defer period process ends Otherwise, the channel detection process of the ECCA detection granularity is continued.

The process is specifically: after the channel detection process of the first detection granularity detects that the channel is idle, as long as the channel detection process with M ECCA detection granularity (no need to be continuous) detects the channel idle, it is determined that the defer period process ends.

Process three:

In any one of the foregoing technical solutions, the defer period process specifically includes: performing a channel detection process of a first detection granularity; and performing an ECCA detection granularity if the channel detection process of the first detection granularity detects that the channel is idle. Channel detection process; determining whether there are M consecutive ECCA detection granularity channel detection processes detect channel idle; determining that the channel is idle when channel detection processes having M consecutive ECCA detection granularities are determined, determining the defer The period process ends, otherwise, the channel detection process of the ECCA detection granularity is continued.

The process is specifically: after the channel detection process of the first detection granularity detects that the channel is idle, when the channel detection process with M consecutive ECCA detection granularities detects that the channel is idle, it is determined that the defer period process ends.

The first detection granularity described above may be 16 us.

FIG. 5 shows a schematic block diagram of a channel detecting apparatus configured with a defer period according to an embodiment of the present invention.

As shown in FIG. 5, a channel detecting apparatus 500 configured with a defer period according to an embodiment of the present invention includes: a configuration unit 502 and a processing unit 504.

The configuration unit 502 is configured to: after the ECCA detection process is performed, configure a defer period process after detecting the ECCA detection granularity of the channel busy; the processing unit 504 is configured to: when the ECCA channel detection process is started, select a random number, and In the subsequent channel detection process, the value of the random number is adjusted according to the detection result of each ECCA detection granularity and the detection result of the CCA detection granularity in the defer period process, until the value of the random number is 0, The ECCA detection process ends.

In the above technical solution, preferably, the processing unit 504 performs an operation of adjusting a value of the random number according to the detection result of each ECCA detection granularity, specifically: if any ECCA detection granularity detects that the channel is busy, The value of the random number is unchanged; if the ECCA detection granularity outside any defer period process detects that the channel is idle, the value of the random number is decremented by one.

In any one of the foregoing technical solutions, the performing, by the processing unit 504, performing the adjustment of the value of the random number according to the detection result of the CCA detection granularity in the defer period process, specifically includes:

In any of the above technical solutions, preferably, the method further includes: a setting unit 506, configured to Before performing the ECCA detection process, setting an observation window for detecting a channel, and detecting a state of the channel through the observation window; and determining unit 508, configured to detect the channel based on the observation window a state, the value of the contention window is determined; the processing unit 504 is specifically configured to select the random number according to the value of the contention window.

In any one of the foregoing technical solutions, the determining unit 508 is specifically configured to: determine, according to a state of the channel that is detected by the observation window, an indicator for indicating the channel state, and determine, according to the indicator, a value of the contention window; wherein the value of the indicator is based on a number of detection granularities in which the channel is detected to be idle in the observation window, and/or based on a detection granularity in which the channel is busy detected in the observation window The number is determined.

In the technical solution, the solution for determining the value of the contention window according to the foregoing indicator is specifically: pre-storing the correspondence between the index and the value of the contention window, and further determining the value of the corresponding contention window according to the foregoing indicator; or according to the value of the indicator Adjust the value of the contention window with the set threshold value. If the value of the indicator is greater than or equal to the first threshold, increase the value of the contention window. Otherwise, decrease the value of the contention window or set the value of the contention window to the minimum. value. When the value of the indicator is less than or equal to the second threshold, the value of the contention window is increased, otherwise the value of the contention window is decreased or the value of the contention window is set to a minimum value.

In any of the above technical solutions, preferably, the defer period is configured in the observation window,

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by M, where M is configured in the observation. The number of ECCA detection granularities in the value of the defer period in the window; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is added to A+2B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is idle is detected during the defer period, and B is the number of non-ECCA detection granularities in which the channel idleness is detected during the defer period in the observation window.

At the end of any defer period process in the observation window, the number of detection granularities of the channel busy detected in the observation window is increased by A, where A is configured in the observation window. The number of ECCA detection granularities in which the channel is busy during the defer period process; or

Process one:

In any of the foregoing technical solutions, the processing unit 504 is further configured to perform the defer period process, specifically:

a first execution unit 504A, configured to perform a channel detection process of a first detection granularity, and perform a channel detection process of an ECCA detection granularity when the channel detection process of the first detection granularity detects that the channel is idle, and is used in the When the channel detection process of the ECCA detection granularity detects that the channel is busy, the channel detection process of the first detection granularity is re-executed; and the first determining unit 504B is configured to: when the channel detection process of the ECCA detection granularity detects that the channel is idle, Determining whether there are M consecutive ECCA detection granularity channel detection processes detecting channel idleness, determining that the defer period process ends when it is determined that the channel detection process with M consecutive ECCA detection granularities detects that the channel is idle, otherwise The channel execution process of the ECCA detection granularity is continued by the first execution unit 504A.

Process two:

In any of the above technical solutions, preferably, the processing unit 504 is further configured to perform the The defer period process includes: a second execution unit 504C, configured to perform a channel detection process of the first detection granularity, and perform channel detection of an ECCA detection granularity when the channel detection process of the first detection granularity detects that the channel is idle. The second determining unit 504D is configured to determine whether there are M cells of the ECCA detection granularity, and the channel detecting process detects that the channel is idle. When it is determined that the channel detection process with M ECCA detection granularity detects that the channel is idle, determining the The defer period process ends, otherwise, the second execution unit 504C continues to perform the channel detection process of the ECCA detection granularity.

Process three:

In any of the foregoing technical solutions, the processing unit 504 is further configured to perform the defer period process, and specifically includes: a third executing unit 504E, configured to perform a channel detection process of the first detection granularity, and used in The channel detection process of the first detection granularity detects a channel detection process of the ECCA detection granularity when the channel is idle; the third determining unit 504F is configured to determine whether there are M consecutive ECCA detection granularity channel detection processes are detected. The channel is idle. When it is determined that the channel detection process with M consecutive ECCA detection granularities detects that the channel is idle, it is determined that the defer period process ends. Otherwise, the third execution unit 504E continues to perform the ECCA detection granularity. Channel detection process.

The first detection granularity described above may be 16 us.

Figure 6 shows a schematic block diagram of a base station in accordance with an embodiment of the present invention.

As shown in FIG. 6, a base station 600 according to an embodiment of the present invention includes: a channel detecting apparatus 500 configured with a defer period as shown in FIG. 5.

As shown in FIG. 7, a terminal 700 according to an embodiment of the present invention includes: a channel detecting apparatus 500 configured with a defer period as shown in FIG. 5.

The technical solution of the present invention will be described in detail below with reference to specific embodiments.

The technical solution of the present invention is mainly for solving how the channel detection result in the defer period is calculated in the channel idle number or the channel busy number, so as to clarify the decrement of the random number N value in the ECCA process, and clearly determine the contention window value. Or when adjusting the metric value, how the number of slots in the defer period is calculated, so that the ECCA process and the process of determining the contention window value are more explicit.

For the defer period process, how to define the defer period window is given as follows: Defer period value = 16us + M × ECCA slot. That is, during the defer period, there are two types of channel detection granularity, one is 16us, the other is ECCA slot (such as 9us), and the following is an example in which ECCA slot is 9us.

1. The three defer period processes proposed by the present invention are as follows:

Process one:

At the beginning of the Defer period process, the first channel detection granularity is 16us, and the channel detection granularity of 9us channel detection is not started until the channel idle duration is detected to be 16us. Next, the channel detection is performed with a granularity of 9us. If the channel is detected to be busy, the detection is restarted at a granularity of 16 us; if the channel is detected to be idle, it is determined whether there are consecutive M 9us channels are idle, and if not, continue to 9us detection, if it is, then the defer period ends.

Process two:

At the beginning of the Defer period process, the first channel detection granularity is 16us, and the channel detection granularity of 9us channel detection is not started until the channel idle duration is detected to be 16us. Next, channel detection is performed with a granularity of 9us. Regardless of whether the channel is busy or not, as long as M idle 9us are detected after an idle 16us, the defer period process ends.

Process three:

At the beginning of the Defer period process, the first channel detection granularity is 16us, and the channel detection granularity of 9us channel detection is not started until the channel idle duration is detected to be 16us. Next, the channel detection is performed with a granularity of 9us. If the channel is busy, the detection is continued with a granularity of 9us; if the channel is detected to be idle, it is determined whether there are consecutive M 9us channels are idle, and if not, the channel continues to be 9us. Detect, if it is, then the defer period ends.

Among them, the difference between process three and process one is that 16us is idle and M is idle. 9us is discontinuous; the difference between process 3 and process 2 is that the idle M 9us are continuous.

2. For the defer period process in the ECCA process, the channel idleness in the defer period process is counted in the number of channel idles, that is, the N value is decremented at the end of the defer period process. Specifically, there are several ways to reduce:

1. The value of N is decremented by 1.

2. The number of decrementing N values is the number of ECCA slots in the defer period value. If the defer period value is 34us, which is a fixed value of 16us+2×ECCA slot (9us), the value of N is decremented by 2; of course, the value of the defer period may not be 34us, which is 16us+M×ECCA slot, then the value of N is decremented by M. .

3. The number of decremented N values is the number of ECCAslots in which the channel is idle during the defer period, that is, even if the channel idle duration does not reach the defer period duration, for example, when only one ECCA slot detects that the channel is idle, the value of N decreases.

If the value of defer period is 34us, the duration of the process in defer period mode is 16us (free) + 9us (free) + 9us (busy) + 16us (busy) + 16us (free) + 9us (free) + 9us (Idle), because there are three 9us detection channels idle in the process, the N value is decremented by 3.

If the value of defer period is 34us, the duration of the process in defer period mode 2 is 16us (free) + 9us (free) + 9us (busy) + 9us (busy) + 9us (free), because there are two times in the process. When the 9us detection channel is idle, the value of N is decremented by 2.

If the value of the defer period is 34us, the duration of the process in the defer period mode 3 is 16us (free) + 9us (free) + 9us (busy) + 9us (free) + 9us (free), because there are three 9us in the process. When the detection channel is idle, the value of N is decremented by 3.

In the technical solution of the present invention, an observation window (periodic or aperiodic) for detecting a channel is set, and an indicator for indicating the channel state is determined based on a state of a channel detected by the observation window ( Metric), and then determining the value of the contention window according to the determined index, and then selecting the random number to be decremented in the ECCA detection process according to the value of the contention window.

The value of the foregoing indicator includes: a first reference value or a ratio of the first reference value to the second reference value; wherein the first reference value includes: a number of detection granularities in which the channel busy is detected in the observation window, and an observation The number of detection granularities in which the channel is idle is detected in the window, and the number of time periods in which the channel is busy is detected in the observation window (if multiple consecutive slots are busy, it is called a time period) The second reference value includes: a detection time of the observation window, a sum of the number of detection granularities in which the channel is detected to be idle in the observation window, and a number of detection granularities in which the channel is busy detected in the observation window.

(1) For the presence of the defer period in the observation window for the contention or window adjustment of the contention window, how many times the channel idles participate in the metric (indicator) channel idle slot during the defer period:

1. At the end of a defer period process, the number of channels idle slots is increased to zero.

2. At the end of a defer period process, the number of channels idle slots is increased to 1.

3. At the end of a defer period process, the number of times the channel idle slot is increased is the number M of the ECCA detection granularity in the defer period value. For the defer period mode one and the third mode, only M 9us in the continuous idle time are calculated.

3. At the end of a defer period process, the number of times of channel idle slots is increased by the number M+1 of the ECCA detection granularity in the defer period value, wherein 16us that detects idle is regarded as idle once. For the defer period mode one and the third mode, only M 9us and 1 16us in the continuous idle time are calculated.

4. At the end of a defer period process, the number of times of channel idle slots is increased by the number M+2 of the ECCA detection granularity in the defer period value, wherein 16us that detects idle is regarded as 2 idle.

5. At the end of a defer period process, the number of ECCA slots in which the channel is idle is detected in the process, that is, the number of times the slot in which the channel is idle is detected.

If the value of defer period is 34us, the duration of the process in defer period mode is 16us (free) + 9us (free) + 9us (busy) + 16us (busy) + 16us (free) + 9us (free) + 9us (Idle), because there are three 9us detection channels idle in the process, so the number of channels idle slots increases by 3.

If the value of defer period is 34us, the duration of the process in defer period mode 2 is 16us (free) + 9us (free) + 9us (busy) + 9us (busy) + 9us (free), because there are two times in the process. The 9us detection channel is idle, so the number of channels idle slots is increased by two.

If the value of the defer period is 34us, the duration of the process in the defer period mode 3 is 16us (free) + 9us (free) + 9us (busy) + 9us (free) + 9us (free), because there are three 9us in the process. The detection channel is idle, so the number of channels idle slots is increased by three.

6. At the end of a defer period process, the sum of the number of ECCA slots (9us) and the number of 16us channels in the process is the number of times the channel idle slots are increased.

If the value of defer period is 34us, the duration of the process in defer period mode is 16us (free) + 9us (free) + 9us (busy) + 16us (busy) + 16us (free) + 9us (free) + 9us (Idle), because there are three 9us and two 16us detection channels idle in the process, so the number of channels idle slots increases by 5.

If the value of defer period is 34us, the duration of the process in defer period mode 2 is 16us (free) + 9us (free) + 9us (busy) + 9us (busy) + 9us (free), because there are two times in the process. 9us and a 16us detection channel are idle, so the number of channels idle slots is increased by 3.

If the value of the defer period is 34us, the duration of the process in the defer period mode 3 is 16us (free) + 9us (free) + 9us (busy) + 9us (free) + 9us (free), because there are three 9us in the process. And a 16us detection channel is idle, so the number of channels idle slots is increased by 4.

7. At the end of a defer period process, the sum of the number of ECCA slots and the number of 16us × 2 in the process is the number of times the channel idle slots are increased.

If the value of defer period is 34us, the duration of the process in defer period mode is 16us (free) + 9us (free) + 9us (busy) + 16us (busy) + 16us (free) + 9us (free) + 9us (Idle), because there are three 9us and two 16us detection channels idle in the process, so the number of channels idle slots increases by 3+2×2=7.

If the value of defer period is 34us, the duration of the process in defer period mode 2 is 16us (free) + 9us (free) + 9us (busy) + 9us (busy) + 9us (free), because there are two times in the process. 9us and a 16us detection channel are idle, so the number of channels idle slots is increased by 2+1×2=4.

If the value of the defer period is 34us, the duration of the process in the defer period mode 3 is 16us (free) + 9us (free) + 9us (busy) + 9us (free) + 9us (free), because there are three 9us in the process. And the 16us detection channel is idle, so the number of channels idle slots is increased by 3+1×2=5.

(2) For the presence of the defer period in the observation window for the contention or adjustment of the contention window value, the number of times the channel busy is involved in the metric (indicator) channel idle slot during the defer period:

1. At the end of a defer period process, the number of busy slots on the channel increases to zero.

2. At the end of a defer period process, the number of busy slots on the channel increases to 1.

3. At the end of a defer period process, the number of ECCA slots in which the channel is busy is detected in the process, that is, the number of times the slot is detected to be busy.

If the value of defer period is 34us, the duration of the process in defer period mode is 16us (free) + 9us (free) + 9us (busy) + 16us (busy) + 16us (free) + 9us (free) + 9us (Idle), because there is a 9us detection channel busy in the process, so the number of busy slots on the channel increases by one.

If the value of defer period is 34us, the duration of the process in defer period mode 2 is 16us (free) + 9us (free) + 9us (busy) + 9us (busy) + 9us (free), because there are two times in the process. The 9us detection channel is busy, so the number of busy slots on the channel is increased by 2.

If the value of defer period is 34us, the duration of the process in defer period mode 3 is 16us (free) + 9us (free) + 9us (busy) + 9us (free) + 9us (free), because there is a 9us in the process. The channel is detected to be busy, so the number of busy slots on the channel is increased by one.

4. At the end of a defer period process, the sum of the number of ECCA slots (9us) and the number of 16us detected in the process is the number of times the number of busy slots of the channel increases.

If the value of defer period is 34us, the duration of the process in defer period mode is 16us (free) + 9us (free) + 9us (busy) + 16us (busy) + 16us (free) + 9us (free) + 9us (Idle), because there is a 9us and a 16us detection channel busy in the process, so the number of busy slots on the channel increases by 2.

If the value of defer period is 34us, the duration of the process in defer period mode 2 is 16us (free) + 9us (free) + 9us (busy) + 9us (busy) + 9us (free), because there are two times in the process. The 9us and 0th 16us detection channels are busy, so the number of busy channels is increased by two.

If the value of defer period is 34us, the duration of the process in defer period mode 3 is 16us (free) + 9us (free) + 9us (busy) + 9us (free) + 9us (free), because there is a 9us in the process. And 0 times 16us detection channel is busy, so the number of channels busy slot increases by 1.

7. At the end of a defer period process, the sum of the number of ECCA slots and the number of 16us x 2 detected in the process is the number of times the channel busy slot is increased.

If the value of the defer period is 34us, the duration of the process in the defer period mode 16us (free) +9us (free) +9us (busy) +16us (busy) +16us (free) +9us (free) +9us (free), because there is a 9us and a 16us detection channel busy in the process, so The number of busy channels in the channel is increased by 1 + 1 × 2 = 3.

For the above counting method, it is considered that the denominator of the metric may be inappropriate for the number of CCA slots, and the length of time directly for the observation window is more appropriate. If the observation window happens to be multiple ECCA slots, it actually has the same meaning as the CCA slot number. However, if the observation window contains various lengths of ICCA, defer period, and ECCA slot, the length of the CCA slot number cannot directly reflect the length of time. In this case, the length of the observation window is more appropriate.

The above solution of the present invention proposes a method of decrementing the random number N value during the defer period. And if there is a defer period process in the observation window for determining or adjusting the contention value of the contention window, how to participate in the metric counting of the free busy slot in the defer period process, so that the metric calculation is more clear, Conducive to the determination or adjustment of the competition window value.

The technical solution of the present invention is described in detail above with reference to the accompanying drawings. The present invention proposes a new channel detection scheme configured with a defer period, and clarifies a method for decrementing the random number N value in the ECCA detection process in which the defer period is configured. At the same time, when there is a defer period process in the observation window, the counting method of the number of busy periods of the channel during the defer period is also clarified, so as to facilitate the adjustment of the contention window.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A channel detection method configured with a defer period, comprising:

When the ECCA detection process is performed, the defer period process is configured after detecting the granularity of the ECCA detection of the channel busy;

When the ECCA channel detection process is started, the random number is selected, and in the subsequent channel detection process, the random number is adjusted according to the detection result of each ECCA detection granularity and the detection result of the CCA detection granularity in the defer period process. The value until the value of the random number is 0 determines that the ECCA detection process ends.
The channel detecting method configured with a defer period according to claim 1, wherein the step of adjusting the value of the random number according to the detection result of each ECCA detection granularity specifically includes:

If any ECCA detection granularity detects that the channel is busy, the value of the random number does not change;

If the ECCA detection granularity outside of any defer period process detects that the channel is idle, the value of the random number is decremented by one.
The channel detecting method configured with a defer period according to claim 1, wherein the step of adjusting the value of the random number according to the detection result of the CCA detection granularity in the defer period process comprises:

Subtracting the value of the random number by one at the end of any of the defer period processes; or

At the end of any of the defer period processes, the number of ECCA detection granularities in the value of the defer period is taken as a value of the random number reduction; or

At the end of any of the defer period processes, the number of ECCA detection granularities in which the channel idle is detected in the defer period detection process is taken as the value of the random number reduction.
The channel detection method configured with a defer period according to claim 1, wherein before performing the ECCA detection process, the method further includes:

Setting an observation window for detecting a channel, and detecting a state of the channel through the observation window;

Determining a value of a contention window based on a state of the channel detected by the observation window;

The random number is selected according to the value of the contention window.
The channel detecting method configured with the defer period according to claim 4, wherein the step of determining the value of the contention window based on the state of the channel detected by the observation window comprises:

Determining, according to the state of the channel detected by the observation window, an indicator for indicating the channel state, and determining a value of the contention window according to the indicator;

The value of the indicator is determined based on the number of detection granularities of detecting channel idleness in the observation window, and/or based on the number of detection granularities in which the channel busy is detected in the observation window.
The channel detection method configured with a defer period according to claim 5, wherein a defer period process is configured in the observation window,

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by 0; or

Adding 1 to the number of detection granularities of channel idle detected in the observation window at the end of any defer period process in the observation window; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by M, where M is the defer period configured in the observation window. The number of ECCA detection granularities in the value; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by M+1, where M is the value configured in the observation window. The number of ECCA detection granularities in the value of the defer period; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by M+2, where M is the value configured in the observation window. The number of ECCA detection granularities in the value of the defer period; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by A, where A is the defer period configured in the observation window. The number of ECCA detection granularities in which the channel is idle during the process; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is added to A+B, where A is configured in the observation. The number of ECCA detection granularities in which the channel is idle is detected in the defer period process in the window, and B is the number of non-ECCA detection granularities in which the channel idleness is detected during the defer period in the observation window; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is added to A+2B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is idle is detected during the defer period, and B is the number of non-ECCA detection granularities in which the channel idleness is detected during the defer period in the observation window.
The channel detection method configured with a defer period according to claim 5, wherein a defer period process is configured in the observation window,

At the end of any defer period process in the observation window, the number of detected granularity of channel busy detected in the observation window is increased by 0; or

Adding 1 to the number of detection granularities of channel busy detected in the observation window at the end of any defer period process in the observation window; or

At the end of any defer period process in the observation window, the number of detection granularities of channel busy detected in the observation window is increased by A, where A is the defer period configured in the observation window. The number of ECCA detection granularities in which the channel is busy detected during the process; or

At the end of any defer period process in the observation window, the number of detected granularity of channel busy detected in the observation window is added to A+B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is busy is detected during the defer period, and B is the number of non-ECCA detection granularities in which the channel busy is detected during the defer period in the observation window; or

At the end of any defer period process in the observation window, the number of detected granularity of channel busy detected in the observation window is added to A+2B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is busy is detected during the defer period, and B is the number of non-ECCA detection granularities in which the channel busy is detected during the defer period in the observation window.
The channel detection method configured with a defer period according to any one of claims 1 to 7, wherein the defer period process specifically includes:

Performing a channel detection process of the first detection granularity;

If the channel detection process of the first detection granularity detects that the channel is idle, performing a channel detection process of the ECCA detection granularity;

When the channel detection process of the ECCA detection granularity detects that the channel is busy, the channel detection process of the first detection granularity is re-executed, and when the channel detection process of the ECCA detection granularity detects that the channel is idle, it is determined whether there is an M. The channel detection process of each successive ECCA detection granularity detects that the channel is idle;

When it is determined that the channel detection process with M consecutive ECCA detection granularities detects that the channel is idle, it is determined that the defer period process ends, otherwise, the channel detection process of the ECCA detection granularity is continued.
The channel detection method configured with a defer period according to any one of claims 1 to 7, wherein the defer period process specifically includes:

Performing a channel detection process of the first detection granularity;

If the channel detection process of the first detection granularity detects that the channel is idle, performing a channel detection process of the ECCA detection granularity;

A channel detection process for determining whether there are M ECCA detection granularities detects that the channel is idle;

When it is determined that the channel detection process with M ECCA detection granularity detects that the channel is idle, it is determined that the defer period process ends, otherwise, the channel detection process of the ECCA detection granularity is continued.
The channel detection method configured with a defer period according to any one of claims 1 to 7, wherein the defer period process specifically includes:

Performing a channel detection process of the first detection granularity;

If the channel detection process of the first detection granularity detects that the channel is idle, performing a channel detection process of the ECCA detection granularity;

A channel detection process for determining whether there are M consecutive ECCA detection granularities detects that the channel is idle;

Determining that the defer period process ends when it is determined that the channel detection process with M consecutive ECCA detection granularities detects that the channel is idle, otherwise, the ECCA check is continued. A granularity channel detection process.
A channel detecting apparatus configured with a defer period, comprising:

a configuration unit, configured to configure a defer period process after detecting an ECCA detection granularity of a channel busy when performing an ECCA detection process;

a processing unit, configured to: when the ECCA channel detection process is started, select a random number, and adjust, according to the detection result of each ECCA detection granularity and the detection result of the CCA detection granularity in the defer period process, in the subsequent channel detection process The value of the random number until the value of the random number is 0, determining that the ECCA detection process ends.
The channel detecting apparatus configured with the defer period according to claim 11, wherein the performing, by the processing unit, performing the adjustment of the value of the random number according to the detection result of the detection granularity of each ECCA comprises:

If any ECCA detection granularity detects that the channel is busy, the value of the random number does not change;

If the ECCA detection granularity outside of any defer period process detects that the channel is idle, the value of the random number is decremented by one.
The channel detecting apparatus configured with a defer period according to claim 11, wherein the processing unit performs an operation of adjusting a value of the random number according to a detection result of a CCA detection granularity in the defer period process, and specifically includes: :

Subtracting the value of the random number by one at the end of any of the defer period processes; or

At the end of any of the defer period processes, the number of ECCA detection granularities in the value of the defer period is taken as a value of the random number reduction; or

At the end of any of the defer period processes, the number of ECCA detection granularities in which the channel idle is detected in the defer period detection process is taken as the value of the random number reduction.
The channel detecting apparatus configured with a defer period according to claim 11, further comprising:

a setting unit, configured to set an observation window for detecting a channel before performing the ECCA detection process, and detecting a status of the channel by using the observation window;

a determining unit, configured to determine a value of a contention window based on a state of the channel detected by the observation window;

The processing unit is specifically configured to select the random number according to the value of the contention window.
The channel detecting apparatus configured with a defer period according to claim 14, wherein the determining unit is specifically configured to:

Determining, according to the state of the channel detected by the observation window, an indicator for indicating the channel state, and determining a value of the contention window according to the indicator;

The value of the indicator is determined based on the number of detection granularities of detecting channel idleness in the observation window, and/or based on the number of detection granularities in which the channel busy is detected in the observation window.
The channel detecting apparatus configured with a defer period according to claim 15, wherein a defer period process is configured in the observation window,

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by 0; or

Adding 1 to the number of detection granularities of channel idle detected in the observation window at the end of any defer period process in the observation window; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by M, where M is the defer period configured in the observation window. The number of ECCA detection granularities in the value; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by M+1, where M is the value configured in the observation window. The number of ECCA detection granularities in the value of the defer period; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by M+2, where M is the value configured in the observation window. The number of ECCA detection granularities in the value of the defer period; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is increased by A, where A is the defer period configured in the observation window. The number of ECCA detection granularities in which the channel is idle during the process; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is added to A+B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is idle during the defer period Number B, which is the number of non-ECCA detection granularities in which the channel idle is detected during the defer period in the observation window; or

At the end of any defer period process in the observation window, the number of detection granularities in which the channel idleness is detected in the observation window is added to A+2B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is idle is detected during the defer period, and B is the number of non-ECCA detection granularities in which the channel idleness is detected during the defer period in the observation window.
The channel detecting apparatus configured with a defer period according to claim 15, wherein a defer period process is configured in the observation window,

At the end of any defer period process in the observation window, the number of detected granularity of channel busy detected in the observation window is increased by 0; or

Adding 1 to the number of detection granularities of channel busy detected in the observation window at the end of any defer period process in the observation window; or

At the end of any defer period process in the observation window, the number of detection granularities of channel busy detected in the observation window is increased by A, where A is the defer period configured in the observation window. The number of ECCA detection granularities in which the channel is busy detected during the process; or

At the end of any defer period process in the observation window, the number of detected granularity of channel busy detected in the observation window is added to A+B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is busy is detected during the defer period, and B is the number of non-ECCA detection granularities in which the channel busy is detected during the defer period in the observation window; or

At the end of any defer period process in the observation window, the number of detected granularity of channel busy detected in the observation window is added to A+2B, where A is the one configured in the observation window. The number of ECCA detection granularities in which the channel is busy is detected during the defer period, and B is the number of non-ECCA detection granularities in which the channel busy is detected during the defer period in the observation window.
The channel detecting apparatus configured with a defer period according to any one of claims 11 to 17, wherein the processing unit is further configured to execute the defer period process, specifically:

a first execution unit, configured to perform a channel detection process of the first detection granularity, and perform a channel detection process of the ECCA detection granularity when the channel detection process of the first detection granularity detects that the channel is idle, and is used in the ECCA When the channel detection process of detecting granularity detects that the channel is busy, re-executing the channel detection process of the first detection granularity;

a first determining unit, configured to determine, when the channel detection process of the ECCA detection granularity detects that the channel is idle, whether the channel detection process of M consecutive ECCA detection granularities detects that the channel is idle, and determines that there are M consecutive When the channel detection process of the ECCA detection granularity detects that the channel is idle, it is determined that the defer period process ends. Otherwise, the first execution unit continues to perform the channel detection process of the ECCA detection granularity.
The channel detecting apparatus configured with a defer period according to any one of claims 11 to 17, wherein the processing unit is further configured to execute the defer period process, specifically:

a second execution unit, configured to perform a channel detection process of the first detection granularity, and perform a channel detection process of an ECCA detection granularity when the channel detection process of the first detection granularity detects that the channel is idle;

a second determining unit, configured to determine whether there are M cells of the ECCA detection granularity, the channel detecting process detects that the channel is idle, and determines that the channel is idle when the channel detecting process with M ECCA detection granularity detects that the channel is idle, determining the defer period process Ending, otherwise, the channel detection process of the ECCA detection granularity is continued by the second execution unit.
The channel detecting apparatus configured with a defer period according to any one of claims 11 to 17, wherein the processing unit is further configured to execute the defer period process, specifically:

a third execution unit, configured to perform a channel detection process of the first detection granularity, and configured to perform a channel detection process of an ECCA detection granularity when the channel detection process of the first detection granularity detects that the channel is idle;

a third determining unit, configured to determine whether there are M consecutive ECCA detection granularity channel detection processes, detecting that the channel is idle, and determining that the channel is idle when the channel detection process with M consecutive ECCA detection granularities is determined, determining The defer period process ends, otherwise, the third execution unit continues to perform the channel detection process of the ECCA detection granularity.