CN109412716B - Method, device and equipment for determining accessible frequency point and readable storage medium - Google Patents

Method, device and equipment for determining accessible frequency point and readable storage medium Download PDF

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CN109412716B
CN109412716B CN201710713446.2A CN201710713446A CN109412716B CN 109412716 B CN109412716 B CN 109412716B CN 201710713446 A CN201710713446 A CN 201710713446A CN 109412716 B CN109412716 B CN 109412716B
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frequency point
frequency
accessible
preset
symbols
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CN109412716A (en
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陈芳
谢明
佟英杉
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Quality & Reliability (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

The invention introduces a method, a device, equipment and a readable storage medium for determining accessible frequency points, wherein the method comprises the following steps: in each sampling time, sequentially and circularly measuring each frequency sweeping frequency point to obtain a measurement result of each frequency sweeping frequency point in one sampling time; according to the measurement results of each frequency sweeping frequency point in a set number of continuous sampling time, calculating the received signal strength indication RSSI mean value and the noise index NI duty ratio of each frequency sweeping frequency point; and determining the accessible frequency points meeting the preset conditions according to the RSSI mean value and the NI duty ratio of each frequency sweeping frequency point. The invention can select the usable frequency points from the unauthorized frequency points and meet the supervision requirements of any place.

Description

Method, device and equipment for determining accessible frequency point and readable storage medium
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method, an apparatus, a device, and a readable storage medium for determining an accessible frequency point.
Background
The 36.889 protocol gives the unauthorized frequency point division, usage and related regulations of 5150-5950MHZ in each country, and the 36.101/104 protocol gives the unauthorized band46 definition under LAA (licensed Assisted Access), the unauthorized frequency point set available under 20M bandwidth, the frequency point combination of the authorized frequency band and the unauthorized frequency band which can be used for CA (Carrier Aggregation) and the Carrier interval between the unauthorized carriers under CA. The requirements and the use methods for each frequency point are as follows:
the frequency point 5150 and 5250MHz are used indoors, the maximum average EIRP (Effective Isotropic Radiated Power) is 200mW and the maximum average EIRP density is 10mW/MHz, and the maximum EIRP density is 0.25mW/25kHz on any 1M bandwidth or any 25kHz frequency point;
the frequency point 5250 and 5350Mhz can be used indoors or outdoors, and the power is different under different conditions;
the frequency point 5470 and 5725MHz, the maximum emission power is 250mW, the maximum average EIRP is 1w, and the maximum average EIRP density is 50 mW/Mhz;
the frequency point 5725 and 5875Mhz are used for ISM (Industrial medicine frequency point), and the radio positioning is mainly distributed at 5850Mhz and needs DFS;
the frequency points 5850-.
Therefore, in the prior art, due to the limited flow, the unauthorized frequency point cannot be involved, and whether the unauthorized frequency point is used by a user or not cannot be judged.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a readable storage medium for determining accessible frequency points, which can select usable frequency points from unauthorized frequency points and meet the supervision requirements of any place.
In order to achieve the above object, the present invention provides a method for determining accessible frequency points, wherein the method comprises:
in each sampling time, sequentially and circularly measuring each frequency sweeping frequency point to obtain a measurement result of each frequency sweeping frequency point in one sampling time;
according to the measurement results of each frequency sweeping frequency point in a set number of continuous sampling time, calculating the received signal strength indication RSSI mean value and the noise index NI duty ratio of each frequency sweeping frequency point;
and determining the accessible frequency points meeting the preset conditions according to the RSSI mean value and the NI duty ratio of each frequency sweeping frequency point.
Optionally, the measurement result includes:
the method comprises the steps of averaging a field intensity value, a total number of symbols, a number of symbols greater than a preset Dynamic Frequency Selection (DFS) threshold value and a number of symbols greater than a preset Carrier Sense Adaptive Transmission (CSAT) threshold value.
Optionally, the calculating the received signal strength indication RSSI mean value and the noise index NI duty cycle of each frequency sweep point according to the measurement result of each frequency sweep point in a set number of consecutive sampling times includes:
obtaining the RSSI mean value of one sweep frequency point by calculating the mean value of the mean field intensity values of the sweep frequency point in the set number of continuous sampling time;
obtaining the NI duty ratio of one sweep frequency point by calculating the ratio of the sum of the number of symbols of the sweep frequency point within the set number of continuous sampling time, wherein the number of symbols is less than or equal to the preset DFS threshold value, to the sum of the total number of symbols of the sweep frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is less than or equal to the preset DFS threshold value, is equal to the sum of the total number of the symbols of the frequency sweeping point within the set number of continuous sampling time minus the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is greater than the preset DFS threshold value.
Optionally, the method further includes:
determining the time ratio of long term evolution LET emission data and LET closing data of the accessible frequency point according to the CAST duty ratio of the accessible frequency point;
the CAST duty ratio of the accessible frequency point is equal to the ratio of the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling time, wherein the number of the symbols is less than or equal to a preset CAST threshold value, and the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are less than or equal to the preset CAST threshold value, is equal to the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling times, minus the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are greater than the preset CAST threshold value.
Optionally, the determining, according to the CAST duty cycle of the accessible frequency point, a time ratio between long term evolution LET emission data and LET closing data of the accessible frequency point includes:
if the CAST duty ratio of the accessible frequency point is smaller than a preset first interference duty ratio threshold value configured by CSAT (continuous adaptive time adaptive transmit) in a full downlink, setting the accessible frequency point as full transmission data;
if the CAST duty ratio of the accessible frequency point is larger than a preset first interference duty ratio threshold value configured by CSAT as a full downlink and smaller than a preset second interference duty ratio threshold value configured by CSAT as a full downlink, setting the time ratio of LET emission data and LET closing data of the accessible frequency point to be 2: 1;
if the CAST duty ratio of the accessible frequency point is larger than a preset CSAT (continuous control adaptive) configured second interference duty ratio threshold value of full downlink and smaller than a preset CSAT configured third interference duty ratio threshold value of full downlink, setting the time ratio of LET emission data and LET closing data of the accessible frequency point to be 1: 1;
if the CAST duty ratio of the accessible frequency point is larger than a preset third interference duty ratio threshold value configured by CSAT (continuous adaptive time adaptive transform) in full downlink, setting the time ratio of LET emission data and LET closing data of the accessible frequency point to be 1: 2;
wherein the third interference duty cycle threshold is greater than the second interference duty cycle threshold; the second interference duty cycle threshold is greater than the first interference duty cycle threshold.
Optionally, the method further includes:
detecting the error rate of the accessible frequency point within the time of transmitting data by LET of the accessible frequency point, and if the detected error rate is greater than a preset error rate threshold value, reselecting the accessible frequency point; or,
detecting the NI value of the accessible frequency point within the time of LET closing data of the accessible frequency point, and if the detected NI value is greater than a preset NI threshold value, reselecting the accessible frequency point
In addition, in order to achieve the above object, the present invention further provides a device for determining an accessible frequency point, where the device includes:
the measuring module is used for sequentially and circularly measuring each frequency sweeping frequency point in each sampling time to obtain the measuring result of each frequency sweeping frequency point in one sampling time;
the calculation module is used for calculating the received signal strength indication RSSI mean value and the noise index NI duty ratio of each frequency sweeping point according to the measurement result of each frequency sweeping point in a set number of continuous sampling time;
and the determining module is used for determining the accessible frequency points meeting the preset conditions according to the RSSI mean value and the NI duty ratio of each frequency sweeping frequency point.
Optionally, the measurement result includes:
the method comprises the steps of averaging a field intensity value, a total number of symbols, a number of symbols greater than a preset Dynamic Frequency Selection (DFS) threshold value and a number of symbols greater than a preset Carrier Sense Adaptive Transmission (CSAT) threshold value.
Optionally, the calculation module is specifically configured to:
obtaining the RSSI mean value of one sweep frequency point by calculating the mean value of the mean field intensity values of the sweep frequency point in the set number of continuous sampling time; obtaining the NI duty ratio of one sweep frequency point by calculating the ratio of the sum of the number of symbols of the sweep frequency point within the set number of continuous sampling time, wherein the number of symbols is less than or equal to the preset DFS threshold value, to the sum of the total number of symbols of the sweep frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is less than or equal to the preset DFS threshold value, is equal to the sum of the total number of the symbols of the frequency sweeping point within the set number of continuous sampling time minus the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is greater than the preset DFS threshold value.
Optionally, the apparatus further comprises:
the configuration module is used for determining the time ratio of long term evolution LET emission data and LET closing data of the accessible frequency point according to the CAST duty ratio of the accessible frequency point; the CAST duty ratio of the accessible frequency point is equal to the ratio of the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling time, wherein the number of the symbols is less than or equal to a preset CAST threshold value, and the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are less than or equal to the preset CAST threshold value, is equal to the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling times, minus the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are greater than the preset CAST threshold value.
Optionally, the apparatus further comprises:
the detection module is used for detecting the error rate of the accessible frequency point within the time of transmitting data by the LET of the accessible frequency point, and if the detected error rate is greater than a preset error rate threshold value, the accessible frequency point is reselected; or, detecting the NI value of the accessible frequency point within the time of LET closing data of the accessible frequency point, and if the detected NI value is greater than a preset NI threshold value, reselecting the accessible frequency point.
In addition, in order to achieve the above object, the present invention further provides an apparatus for determining an accessible frequency point, where the apparatus includes: a processor, a memory, and a communication bus;
the communication bus is used for realizing connection communication between the processor and the memory;
the processor is configured to execute a program stored in the memory for determining an accessible frequency point, so as to implement the steps of the method for determining an accessible frequency point described above.
In addition, in order to achieve the above object, the present invention further provides a readable storage medium, where a program for determining an accessible frequency point is stored;
when the program for determining accessible frequency points is executed by at least one processor, the at least one processor is caused to execute the steps of the method for determining accessible frequency points described above.
The method, the device, the equipment and the readable storage medium for determining the accessible frequency points can select the usable frequency points from the unauthorized frequency points, meet the supervision requirements of any place, can effectively and fairly coexist with WIFI, and can also meet the effective and fair coexistence of LAA among different operators.
Drawings
Fig. 1 is a flowchart of a method for determining accessible frequency points according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for determining accessible frequency points according to a second embodiment of the present invention;
fig. 3 is a flowchart of a method for determining accessible frequency points according to a third embodiment of the present invention;
fig. 4 is a schematic illustration of a sweep window in a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a device for determining accessible frequency points according to a fourth embodiment of the present invention.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.
A first embodiment of the present invention provides a method for determining an accessible frequency point, which specifically includes the following steps, as shown in fig. 1:
step S101: and in each sampling time, sequentially and circularly measuring each frequency sweeping frequency point to obtain the measurement result of each frequency sweeping frequency point in one sampling time.
Specifically, before step S101, the method further includes:
acquiring configured sweep frequency parameters; the sweep frequency parameters include: frequency sweep range, Frequency sweep bandwidth, DFS (Dynamic Frequency Selection) threshold, Frequency sweep time, and sampling time.
Frequency points of the frequency sweep can be determined according to the frequency sweep range and the frequency sweep bandwidth; the regulations of each country on the sweep frequency range are different; in this embodiment, the sweep bandwidth is set to 20M, the DFS threshold is set to-62 dBm, and the sweep time is set to 60s or 10 min; the sampling time is set by an administrator and is less than the sweep time.
In this embodiment, each frequency sweep frequency point is measured in a frequency point continuous and time discrete manner.
Further, the measurement result includes:
the average field strength value, the total number of symbols, the number of symbols greater than a preset DFS threshold value, and the number of symbols greater than a preset CSAT (Carrier Sense Adaptive Transmission) threshold value.
And sequentially and circularly measuring each frequency sweeping frequency point in a sampling time, and then calculating the average field intensity value, the total number of symbols larger than a preset DFS threshold value and the total number of symbols larger than a preset CSAT threshold value of one frequency sweeping frequency point in the sampling time.
Step S102: according to the measurement result of each frequency point in a set number of continuous sampling time, calculating the RSSI (Received Signal Strength Indication) mean value and NI (Noise Index) duty ratio of each frequency point.
Specifically, step S102 includes:
obtaining the RSSI mean value of one sweep frequency point by calculating the mean value of the mean field intensity values of the sweep frequency point in the set number of continuous sampling time;
obtaining the NI duty ratio of one sweep frequency point by calculating the ratio of the sum of the number of symbols of the sweep frequency point within the set number of continuous sampling time, wherein the number of symbols is less than or equal to the preset DFS threshold value, to the sum of the total number of symbols of the sweep frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is less than or equal to the preset DFS threshold value, is equal to the sum of the total number of the symbols of the frequency sweeping point within the set number of continuous sampling time minus the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is greater than the preset DFS threshold value.
Step S103: and determining the accessible frequency points meeting the preset conditions according to the RSSI mean value and the NI duty ratio of each frequency sweeping frequency point.
Specifically, the preset conditions include: the RSSI mean value of one frequency sweeping point is smaller than a preset DFS threshold value, and the NI duty ratio of the frequency sweeping point is smaller than a preset NI duty ratio threshold value.
And selecting the frequency sweeping frequency points with the RSSI mean value smaller than a preset DFS threshold value and the NI duty ratio smaller than a preset NI duty ratio threshold value as accessible frequency points according to the RSSI mean value and the NI duty ratio of each frequency sweeping frequency point.
Further, after determining the accessible frequency point, the method further includes:
determining a time ratio of LET (Long Term Evolution) emission data and LET closing data of the accessible frequency point according to the CAST duty ratio of the accessible frequency point;
the CAST duty ratio of the accessible frequency point is equal to the ratio of the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling time, wherein the number of the symbols is less than or equal to a preset CAST threshold value, and the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are less than or equal to the preset CAST threshold value, is equal to the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling times, minus the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are greater than the preset CAST threshold value.
Specifically, if the CAST duty ratio of an accessible frequency point is smaller than a preset first interference duty ratio threshold value configured as a full downlink by CSAT, setting the accessible frequency point as full transmission data;
if the CAST duty ratio of the accessible frequency point is larger than a preset first interference duty ratio threshold value configured by CSAT as a full downlink and smaller than a preset second interference duty ratio threshold value configured by CSAT as a full downlink, setting the time ratio of LET emission data and LET closing data of the accessible frequency point to be 2: 1;
if the CAST duty ratio of the accessible frequency point is larger than a preset CSAT (continuous control adaptive) configured second interference duty ratio threshold value of full downlink and smaller than a preset CSAT configured third interference duty ratio threshold value of full downlink, setting the time ratio of LET emission data and LET closing data of the accessible frequency point to be 1: 1;
if the CAST duty ratio of the accessible frequency point is larger than a preset third interference duty ratio threshold value configured by CSAT (continuous adaptive time adaptive transform) in full downlink, setting the time ratio of LET emission data and LET closing data of the accessible frequency point to be 1: 2;
wherein the third interference duty cycle threshold is greater than the second interference duty cycle threshold; the second interference duty cycle threshold is greater than the first interference duty cycle threshold.
Further, in the process of using the determined accessible frequency point, the method further includes:
detecting the error rate of the accessible frequency point within the time of transmitting data by LET of the accessible frequency point, and if the detected error rate is greater than a preset error rate threshold value, reselecting the accessible frequency point; or,
and detecting the NI value of the accessible frequency point within the time of closing data of the LET of the accessible frequency point, and if the detected NI value is greater than a preset NI threshold value, reselecting the accessible frequency point.
In a second embodiment of the present invention, a device for determining an accessible frequency point, as shown in fig. 2, specifically includes the following components:
the measurement module 201 is configured to sequentially and cyclically measure each frequency sweeping frequency point within each sampling time, so as to obtain a measurement result of each frequency sweeping frequency point within one sampling time.
Specifically, the apparatus further comprises:
the acquisition module is used for acquiring configured sweep frequency parameters before measuring each sweep frequency point; the sweep frequency parameters include: frequency sweep range, Frequency sweep bandwidth, DFS (Dynamic Frequency Selection) threshold, Frequency sweep time, and sampling time.
Frequency points of the frequency sweep can be determined according to the frequency sweep range and the frequency sweep bandwidth; the regulations of each country on the sweep frequency range are different; in this embodiment, the sweep bandwidth is set to 20M, the DFS threshold is set to-62 dBm, and the sweep time is set to 60s or 10 min; the sampling time is set by an administrator and is less than the sweep time.
In this embodiment, each frequency sweep frequency point is measured in a frequency point continuous and time discrete manner.
Further, the measurement result includes:
the average field strength value, the total number of symbols, the number of symbols greater than a preset DFS threshold value, and the number of symbols greater than a preset CSAT (Carrier Sense Adaptive Transmission) threshold value.
And sequentially and circularly measuring each frequency sweeping frequency point in a sampling time, and then calculating the average field intensity value, the total number of symbols larger than a preset DFS threshold value and the total number of symbols larger than a preset CSAT threshold value of one frequency sweeping frequency point in the sampling time.
The calculating module 202 is configured to calculate an RSSI (Received Signal Strength Indication) mean value and an NI (Noise Index) duty ratio of each frequency sweep point according to a measurement result of each frequency sweep point in a set number of consecutive sampling times.
Specifically, the calculating module 202 is configured to:
obtaining the RSSI mean value of one sweep frequency point by calculating the mean value of the mean field intensity values of the sweep frequency point in the set number of continuous sampling time;
obtaining the NI duty ratio of one sweep frequency point by calculating the ratio of the sum of the number of symbols of the sweep frequency point within the set number of continuous sampling time, wherein the number of symbols is less than or equal to the preset DFS threshold value, to the sum of the total number of symbols of the sweep frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is less than or equal to the preset DFS threshold value, is equal to the sum of the total number of the symbols of the frequency sweeping point within the set number of continuous sampling time minus the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is greater than the preset DFS threshold value.
And the determining module 203 is configured to determine, according to the RSSI mean value and the NI duty ratio of each frequency sweep frequency point, an accessible frequency point that meets a preset condition.
Specifically, the preset conditions include: the RSSI mean value of one frequency sweeping point is smaller than a preset DFS threshold value, and the NI duty ratio of the frequency sweeping point is smaller than a preset NI duty ratio threshold value.
And selecting the frequency sweeping frequency points with the RSSI mean value smaller than a preset DFS threshold value and the NI duty ratio smaller than a preset NI duty ratio threshold value as accessible frequency points according to the RSSI mean value and the NI duty ratio of each frequency sweeping frequency point.
Further, the apparatus further comprises:
a configuration module, configured to determine, after an accessible frequency point is determined, a time ratio between LET (Long Term Evolution) emission data and LET closing data of the accessible frequency point according to a CAST duty cycle of the accessible frequency point;
the CAST duty ratio of the accessible frequency point is equal to the ratio of the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling time, wherein the number of the symbols is less than or equal to a preset CAST threshold value, and the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are less than or equal to the preset CAST threshold value, is equal to the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling times, minus the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are greater than the preset CAST threshold value.
Preferably, the configuration module is specifically configured to:
if the CAST duty ratio of the accessible frequency point is smaller than a preset first interference duty ratio threshold value configured by CSAT (continuous adaptive time adaptive transmit) in a full downlink, setting the accessible frequency point as full transmission data;
if the CAST duty ratio of the accessible frequency point is larger than a preset first interference duty ratio threshold value configured by CSAT as a full downlink and smaller than a preset second interference duty ratio threshold value configured by CSAT as a full downlink, setting the time ratio of LET emission data and LET closing data of the accessible frequency point to be 2: 1;
if the CAST duty ratio of the accessible frequency point is larger than a preset CSAT (continuous control adaptive) configured second interference duty ratio threshold value of full downlink and smaller than a preset CSAT configured third interference duty ratio threshold value of full downlink, setting the time ratio of LET emission data and LET closing data of the accessible frequency point to be 1: 1;
if the CAST duty ratio of the accessible frequency point is larger than a preset third interference duty ratio threshold value configured by CSAT (continuous adaptive time adaptive transform) in full downlink, setting the time ratio of LET emission data and LET closing data of the accessible frequency point to be 1: 2;
wherein the third interference duty cycle threshold is greater than the second interference duty cycle threshold; the second interference duty cycle threshold is greater than the first interference duty cycle threshold.
Still further, the apparatus further comprises:
the detection module is used for detecting the error rate of the accessible frequency point within the time of transmitting data by the LET of the accessible frequency point in the use process of the determined accessible frequency point, and if the detected error rate is greater than a preset error rate threshold value, reselecting the accessible frequency point; or, detecting the NI value of the accessible frequency point within the time of LET closing data of the accessible frequency point, and if the detected NI value is greater than a preset NI threshold value, reselecting the accessible frequency point.
In a third embodiment of the present invention, a method for determining an accessible frequency point, as shown in fig. 3, the method specifically includes the following steps:
step S301: and when receiving a DFS frequency sweep starting instruction and frequency sweep parameters, carrying out parameter configuration and sequentially and circularly measuring each frequency sweep frequency point.
Specifically, the sweep frequency parameters include: sweep range, sweep bandwidth, DFS threshold, sweep time, and sampling time.
Frequency sweep range: the regulations of each country on the sweep frequency range are different; in this embodiment, an operation interface may be provided, so that the user can set the sweep range through the operation interface. In the operation interface, 8 frequency sweep ranges are provided, and a user can determine the frequency sweep ranges through selection. The sweep frequency range and the sweep frequency bandwidth can determine sweep frequency points meeting the protocol.
Frequency sweep bandwidth: the target protocol only supports 20M bandwidth configurations.
DFS threshold: the regulations in each country are different, and the default is-62 dBm under LAA (Licensed Assisted Access).
Frequency sweep time: from DFS requirements of each country, the detection time of CAC (Channel Availability Check) is 60s, and after each frequency sweep range, it corresponds to a frequency sweep time, and the selectable values are 60s and 10 min.
Sampling time: set by the user, at least two sampling times are included in one sweep time.
In this embodiment, each frequency sweep frequency point is measured in a frequency point continuous and time discrete manner.
Further, the sequentially and circularly measuring the frequency points of each sweep frequency includes:
and in each sampling time, acquiring the average field intensity value, the total number of symbols, the number of symbols larger than a preset DFS threshold value and the number of symbols larger than a preset CSAT threshold value of each frequency sweeping frequency point.
And in a sampling time, sequentially and circularly measuring each frequency sweeping frequency point. And when one sampling time is finished, calculating the average field intensity value, the total number of symbols larger than the preset DFS threshold value and the total number of symbols larger than the preset CSAT threshold value of one sweep frequency point in one sampling time.
For example, in the nth sampling time, frequency points and bandwidth are sequentially configured according to the sequence from f1 to fk, the field intensity value, the number of symbols larger than the DFS threshold and the number of symbols larger than the CSAT threshold of each frequency point are read, and after one round of reading is finished, the next round of reading is carried out until the sampling time is finished. In one sampling time, m rounds of reading are carried out on the frequency points from f1 to fk, namely, for any frequency point, m times of reading are carried out in one sampling time. That is, the field strength values read by fk in the nth sampling time are Pkn1, Pkn2, … …, Pknm; the number of symbols is Tkn1, Tkn2, … … and Tknm; the number of symbols larger than the preset DFS threshold is Dkn1, Dkn2, … … and Dknm; the number of symbols greater than the preset CSAT threshold is Ckn1, Ckn2, … … and Cknm. By adopting the frequency point scanning mode, the timeliness of the field intensity information of all frequency points can be ensured to be the same. And then calculating the average field intensity value, the total number of symbols larger than a preset DFS threshold value and the total number of symbols larger than a preset CSAT threshold value of each frequency sweeping frequency point in the sampling time. That is, the average field strength value of fk in the nth sampling time is Pkn ═ (Pkn1+ Pkn2+ … … + Pknm)/m; total number of symbols Tkn ═ (Tkn1+ Tkn2+ … … + Tknm); the total number of symbols greater than the preset DFS threshold is Dkn ═ (Dkn + Dkn2+ … … + Dknm); the total number of symbols greater than the preset CSAT threshold is Ckn ═ Ckn (Ckn1+ Ckn2+ … … + Cknm).
Step S302: and when the sweep frequency time is over, stopping measurement, and counting the measurement result in the sweep frequency window. Wherein the sweep window includes a set number of measurements over successive sampling times.
Specifically, the sweep frequency window is a sliding window, and the sweep frequency window is a measurement result in the nearest n sampling times of each frequency point. For example, taking the frequency sweep frequency points f1 to fk as an example, after n sampling times, each frequency sweep frequency point in the frequency sweep window has n measurement results, and after n +1 sampling times, each frequency sweep frequency point in the frequency sweep window has n nearest measurement results, as shown in fig. 4.
And when the sweep frequency time is over, reporting the latest n measurement results in the sweep frequency window.
Step S303: and selecting the accessible frequency point according to the reported measurement result.
In this embodiment, one or more sweep units may execute the sweep operation of step S302 to obtain the measurement result of each sweep frequency point.
When a single frequency sweeping unit is used for measuring frequency sweeping points, and Pikn represents an RSSI value measured in nth sampling time at a kth frequency sweeping point reported by an ith frequency sweeping unit, a configured DFS threshold is-62 dB and a configured NI duty ratio threshold is 80%, the method for selecting the accessible frequency points comprises the following steps:
step A1: and calculating the RSSI mean value and the NI duty ratio of each frequency sweeping point according to the measurement result reported by the single frequency sweeping unit.
And the RSSI mean value of each frequency sweeping frequency point is the mean value of Pkn in n sampling time reported by the frequency sweeping unit.
The NI duty ratio of each frequency sweeping frequency point is the difference value of the sum of total symbols Tkn reported by each frequency sweeping frequency point and the sum of total symbols Dkn exceeding DFS, and then the difference value is divided by the sum of total symbols Tkn.
Step A2: and selecting a frequency point set which meets the conditions that the RSSI mean value is smaller than the DFS threshold value and the NI duty ratio is smaller than the NI duty ratio threshold value in the report of the single frequency sweeping unit. The frequency points in the set are accessible frequency points.
When the frequency sweeping frequency points are measured by a plurality of frequency sweeping units, the method for selecting the accessible frequency points comprises the following steps:
step B1: and selecting a frequency point set of which the RSSI mean value is smaller than the DFS threshold value and the NI duty ratio is smaller than the NI duty ratio threshold value by the single frequency sweeping unit. And taking intersection of the frequency point sets of all the frequency sweeping units.
Step B2: when the configuration is 1 clamped +1 un-clamped, if a plurality of frequency points exist in the intersection, selecting the frequency point with the lowest overall interference duty ratio as the finally output accessible frequency point, and ending the process; if the intersection is empty, go to step B4.
Step B3: when the configuration is 1 clamped +2 un-clamped, if two continuous frequency points can be found in the intersection, the two continuous frequency points are accessible frequency points (if a plurality of continuous frequency point groups meet the requirement, the frequency point group with the minimum total interference duty ratio and value is selected), and the process is ended; if the intersection is empty or the intersection is not empty and there are no two consecutive frequency points, go to step B4.
Step B4: and when the result of dividing the number of the frequency sweeping units containing a certain specific frequency point by the total number of the frequency sweeping units is greater than a preset percentage threshold value of the frequency sweeping units, considering that the specific frequency point is available, screening the frequency points, if the frequency point set is non-empty, turning to the step B5, and if the frequency point set is empty, turning to the step B7.
Step B5: when the configuration is 1 clamped +1 un-clamped, if a plurality of frequency points exist in the intersection, the frequency point with the largest frequency sweeping unit number/radio frequency unit total number is selected, and the process is ended.
Step B6: when the configuration is 1 clamped +2 un-clamped, if two continuous frequency points can be found in the available frequency points selected in the step B4, the configuration is carried out, if two continuous frequency points cannot be found, if the intersection of the step B3 is not empty, the frequency point with the lowest duty ratio in the step B3 is selected for configuration, if the intersection of the step B3 is empty, the frequency point with the lowest duty ratio in the step B4 is selected for configuration, only one unauthorized carrier is configured, the Non-occupation time parameter Non-occupation time (default 30 minutes) of the channel is introduced, and after the Non-occupation time (default 30 minutes) is long, the DFS frequency sweeping is restarted.
Step B7: and if the available frequency point cannot be found, the DFS process is executed again.
Step S304: and determining the time ratio of LET emission data and LET closing data of the accessible frequency point according to the CAST duty ratio of the accessible frequency point.
Specifically, for a determined accessible frequency point, if the accessible frequency point is clean and is considered to be non-interference, the initial CSAT is configured into a full-downlink mode; and if the determined accessible frequency point is not clean, finding out the corresponding time allocation of CSAT LTE on/off according to the duty ratio calculated by the CSAT threshold value.
The CAST duty ratio of the frequency point selected by the frequency point selection is the difference value of the sum of the total number of the symbols Tkn reported by all frequency sweep units at the frequency point and the sum of the total number of the symbols Ckn exceeding CAST, and is divided by the sum of the total number of the symbols Tkn of all radio frequency units.
Further, if the CAST duty ratio of the frequency point is less than the interference duty ratio threshold 0 (default 5%, configurable) configured by the CSAT in the full downlink, the frequency point is considered to be free of interference, and can be configured as a full transmission data and a frequent mode.
If the CAST duty cycle of the frequency point is larger than an interference duty cycle threshold 0 (default 5%, configurable) configured by CSAT for the full downlink and smaller than an interference duty cycle threshold 1 (default 30%, configurable) configured by CSAT for the full downlink, the interference is considered to be small, and the on-off time ratio of the configurable LTE transmission data and the configurable LTE closing data is 2: 1.
If the CAST duty ratio of the frequency point is greater than the interference duty ratio threshold 1 (default 30%, configurable) configured by the CSAT as the full downlink and less than the interference duty ratio threshold 2 (default 60%, configurable) configured by the CSAT as the full downlink, the interference is considered to be not large, and the on-off time ratio of the configurable LTE transmission data and the off-off data is 1: 1.
If the CAST duty ratio of the frequency point is larger than the interference duty ratio threshold 2 (default 60%, configurable) configured by CSAT for the full downlink, the interference is considered to be large, and the on-off time ratio of the configurable LTE transmitting data and the configurable LTE closing data is 1: 2.
Step S305: the LAA secondary cell is configured and used.
Specifically, according to the selected accessible frequency point, the frequency point configuration process is completed. If continuous in-band carrier aggregation exists in the unlicensed frequency band, the value of the channel interval is 19.8 or 20.1(20M bandwidth), and when the existing CA, 20M +20M carrier aggregation exists, the range of the channel interval is 18 to 19.8, and in order to keep compatibility with the existing processing, the channel interval of the in-band continuous carrier aggregation under the unlicensed carrier is configured to be 19.8M.
Step S306: in the using process of the determined accessible frequency point, whether the signal receives interference is detected, if so, step S301 is executed again to select a new accessible frequency point.
Specifically, the detection in the use process has the following two modes:
the first method is as follows: and detecting the error rate of the accessible frequency point within the time of transmitting data by the LET of the accessible frequency point, and if the detected error rate is greater than a preset error rate threshold value, reselecting the accessible frequency point.
The second method comprises the following steps: and detecting the NI value of the accessible frequency point within the time of closing data of the LET of the accessible frequency point, and if the detected NI value is greater than a preset NI threshold value, reselecting the accessible frequency point.
A fourth embodiment of the present invention provides an apparatus for determining an accessible frequency point, where as shown in fig. 5, the apparatus includes: a processor 501, a memory 502, and a communication bus;
the communication bus is used for realizing connection communication between the processor 501 and the memory 502;
the processor 501 is configured to execute a program stored in the memory 502 for determining an accessible frequency point, so as to implement the following steps:
in each sampling time, sequentially and circularly measuring each frequency sweeping frequency point to obtain a measurement result of each frequency sweeping frequency point in one sampling time;
according to the measurement results of each frequency sweeping frequency point in a set number of continuous sampling time, calculating the received signal strength indication RSSI mean value and the noise index NI duty ratio of each frequency sweeping frequency point;
and determining the accessible frequency points meeting the preset conditions according to the RSSI mean value and the NI duty ratio of each frequency sweeping frequency point.
A fifth embodiment of the present invention proposes a readable storage medium storing a program for determining an accessible frequency point;
when executed by at least one processor, the program for determining accessible frequency points causes the at least one processor to:
in each sampling time, sequentially and circularly measuring each frequency sweeping frequency point to obtain a measurement result of each frequency sweeping frequency point in one sampling time;
according to the measurement results of each frequency sweeping frequency point in a set number of continuous sampling time, calculating the received signal strength indication RSSI mean value and the noise index NI duty ratio of each frequency sweeping frequency point;
and determining the accessible frequency points meeting the preset conditions according to the RSSI mean value and the NI duty ratio of each frequency sweeping frequency point.
The method, the device, the equipment and the readable storage medium for determining the accessible frequency points, which are introduced in the embodiment of the invention, can select the usable frequency points from the unauthorized frequency points, meet the supervision requirements of any place, can effectively and fairly coexist with WIFI, and can also meet the effective and fair coexistence of LAA among different operators.
While the invention has been described in connection with specific embodiments thereof, it is to be understood that it is intended by the appended drawings and description that the invention may be embodied in other specific forms without departing from the spirit or scope of the invention.

Claims (15)

1. A method for determining accessible frequency points is characterized in that the method comprises the following steps:
in each sampling time, sequentially and circularly measuring each frequency sweeping frequency point to obtain a measurement result of each frequency sweeping frequency point in one sampling time;
according to the measurement results of each frequency sweeping frequency point in a set number of continuous sampling time, calculating the received signal strength indication RSSI mean value and the noise index NI duty ratio of each frequency sweeping frequency point; the noise figure NI duty cycle comprises: obtaining the NI duty ratio of one sweep frequency point by calculating the ratio of the sum of the number of symbols of the sweep frequency point within the set number of continuous sampling time, wherein the number of symbols is less than or equal to the preset DFS threshold value, to the sum of the total number of symbols of the sweep frequency point within the set number of continuous sampling time;
and determining the accessible frequency points meeting the preset conditions according to the RSSI mean value and the NI duty ratio of each frequency sweeping frequency point.
2. The method for determining accessible frequency points according to claim 1, wherein the measurement result comprises:
the method comprises the steps of averaging a field intensity value, a total number of symbols, a number of symbols greater than a preset Dynamic Frequency Selection (DFS) threshold value and a number of symbols greater than a preset Carrier Sense Adaptive Transmission (CSAT) threshold value.
3. The method for determining accessible frequency points according to claim 2, wherein the calculating the received signal strength indication RSSI mean value and the noise index NI duty cycle of each frequency sweep point according to the measurement result of each frequency sweep point in a set number of consecutive sampling times comprises:
obtaining the RSSI mean value of one sweep frequency point by calculating the mean value of the mean field intensity values of the sweep frequency point in the set number of continuous sampling time;
obtaining the NI duty ratio of one sweep frequency point by calculating the ratio of the sum of the number of symbols of the sweep frequency point within the set number of continuous sampling time, wherein the number of symbols is less than or equal to the preset DFS threshold value, to the sum of the total number of symbols of the sweep frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is less than or equal to the preset DFS threshold value, is equal to the sum of the total number of the symbols of the frequency sweeping point within the set number of continuous sampling time minus the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is greater than the preset DFS threshold value.
4. The method for determining accessible frequency points according to claim 1, wherein the preset conditions include: the RSSI mean value of one frequency sweeping point is smaller than a preset DFS threshold value, and the NI duty ratio of the frequency sweeping point is smaller than a preset NI duty ratio threshold value.
5. The method for determining accessible frequency points according to claim 2, wherein after determining accessible frequency points satisfying a preset condition, the method further comprises:
determining the time ratio of Long Term Evolution (LTE) emission data and LTE closing data of the accessible frequency point according to the CAST duty ratio of the accessible frequency point;
the CAST duty ratio of the accessible frequency point is equal to the ratio of the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling time, wherein the number of the symbols is less than or equal to a preset CAST threshold value, and the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are less than or equal to the preset CAST threshold value, is equal to the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling times, minus the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are greater than the preset CAST threshold value.
6. The method for determining the accessible frequency point according to claim 5, wherein the determining the time ratio of Long Term Evolution (LTE) transmission data and LTE closing data of the accessible frequency point according to the CAST duty cycle of the accessible frequency point comprises:
if the CAST duty ratio of the accessible frequency point is smaller than a preset first interference duty ratio threshold value configured by CSAT (continuous adaptive time adaptive transmit) in a full downlink, setting the accessible frequency point as full transmission data;
if the CAST duty ratio of the accessible frequency point is larger than a preset first interference duty ratio threshold value configured by CSAT as a full downlink and smaller than a preset second interference duty ratio threshold value configured by CSAT as a full downlink, setting the time ratio of LTE emission data and LTE closing data of the accessible frequency point to be 2: 1;
if the CAST duty ratio of the accessible frequency point is larger than a preset second interference duty ratio threshold value configured by CSAT as a full downlink and smaller than a preset third interference duty ratio threshold value configured by CSAT as a full downlink, setting the time ratio of LTE emission data and LTE closing data of the accessible frequency point to be 1: 1;
if the CAST duty ratio of the accessible frequency point is larger than a preset third interference duty ratio threshold value configured by CSAT (continuous control adaptive transmission) in full downlink, setting the time ratio of LTE (long term evolution) emission data and LTE closing data of the accessible frequency point to be 1: 2;
wherein the third interference duty cycle threshold is greater than the second interference duty cycle threshold; the second interference duty cycle threshold is greater than the first interference duty cycle threshold.
7. The method for determining accessible frequency points according to claim 5, wherein the method further comprises:
detecting the error rate of the accessible frequency point within the time of LTE data transmission of the accessible frequency point, and if the detected error rate is greater than a preset error rate threshold value, reselecting the accessible frequency point; or,
and detecting the NI value of the accessible frequency point within the time of the LTE closing data of the accessible frequency point, and if the detected NI value is greater than a preset NI threshold value, reselecting the accessible frequency point.
8. An apparatus for determining accessible frequency points, the apparatus comprising:
the measuring module is used for sequentially and circularly measuring each frequency sweeping frequency point in each sampling time to obtain the measuring result of each frequency sweeping frequency point in one sampling time;
the calculation module is used for calculating the received signal strength indication RSSI mean value and the noise index NI duty ratio of each frequency sweeping point according to the measurement result of each frequency sweeping point in a set number of continuous sampling time; the noise figure NI duty cycle comprises: obtaining the NI duty ratio of one sweep frequency point by calculating the ratio of the sum of the number of symbols of the sweep frequency point within the set number of continuous sampling time, wherein the number of symbols is less than or equal to the preset DFS threshold value, to the sum of the total number of symbols of the sweep frequency point within the set number of continuous sampling time;
and the determining module is used for determining the accessible frequency points meeting the preset conditions according to the RSSI mean value and the NI duty ratio of each frequency sweeping frequency point.
9. The apparatus for determining accessible frequency points according to claim 8, wherein the measurement result comprises:
the method comprises the steps of averaging a field intensity value, a total number of symbols, a number of symbols greater than a preset Dynamic Frequency Selection (DFS) threshold value and a number of symbols greater than a preset Carrier Sense Adaptive Transmission (CSAT) threshold value.
10. The apparatus for determining accessible frequency points according to claim 9, wherein the calculating module is specifically configured to:
obtaining the RSSI mean value of one sweep frequency point by calculating the mean value of the mean field intensity values of the sweep frequency point in the set number of continuous sampling time; obtaining the NI duty ratio of one sweep frequency point by calculating the ratio of the sum of the number of symbols of the sweep frequency point within the set number of continuous sampling time, wherein the number of symbols is less than or equal to the preset DFS threshold value, to the sum of the total number of symbols of the sweep frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is less than or equal to the preset DFS threshold value, is equal to the sum of the total number of the symbols of the frequency sweeping point within the set number of continuous sampling time minus the sum of the number of the symbols of the frequency sweeping point within the set number of continuous sampling time, which is greater than the preset DFS threshold value.
11. The apparatus for determining accessible frequency points according to claim 8, wherein the preset conditions include: the RSSI mean value of one frequency sweeping point is smaller than a preset DFS threshold value, and the NI duty ratio of the frequency sweeping point is smaller than a preset NI duty ratio threshold value.
12. The apparatus for determining accessible frequency points according to claim 9, wherein said apparatus further comprises:
the configuration module is used for determining the time ratio of Long Term Evolution (LTE) emission data and LTE closing data of the accessible frequency point according to the CAST duty ratio of the accessible frequency point after the accessible frequency point meeting the preset condition is determined; the CAST duty ratio of the accessible frequency point is equal to the ratio of the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling time, wherein the number of the symbols is less than or equal to a preset CAST threshold value, and the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling time; the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are less than or equal to the preset CAST threshold value, is equal to the sum of the total number of the symbols of the accessible frequency point within the set number of continuous sampling times, minus the sum of the number of the symbols of the accessible frequency point within the set number of continuous sampling times, which are greater than the preset CAST threshold value.
13. The apparatus for determining accessible frequency points according to claim 12, wherein said apparatus further comprises:
the detection module is used for detecting the error rate of the accessible frequency point within the time of LTE data transmission of the accessible frequency point, and if the detected error rate is greater than a preset error rate threshold value, the accessible frequency point is reselected; or detecting the NI value of the accessible frequency point within the time of LTE closing data of the accessible frequency point, and if the detected NI value is greater than a preset NI threshold value, reselecting the accessible frequency point.
14. An apparatus for determining accessible frequency points, the apparatus comprising: a processor, a memory, and a communication bus;
the communication bus is used for realizing connection communication between the processor and the memory;
the processor is configured to execute a program stored in the memory for determining an accessible frequency point, so as to implement the steps of the method for determining an accessible frequency point according to any one of claims 1 to 7.
15. A readable storage medium, wherein the readable storage medium stores a program for determining an accessible frequency point;
the program for determining accessible frequency points, when executed by at least one processor, causes the at least one processor to perform the steps of the method for determining accessible frequency points according to any of claims 1 to 7.
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