CN112770281B - Access control method in field of Internet of things of power equipment - Google Patents
Access control method in field of Internet of things of power equipment Download PDFInfo
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- CN112770281B CN112770281B CN202011613431.7A CN202011613431A CN112770281B CN 112770281 B CN112770281 B CN 112770281B CN 202011613431 A CN202011613431 A CN 202011613431A CN 112770281 B CN112770281 B CN 112770281B
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims description 9
- 238000012790 confirmation Methods 0.000 claims description 5
- 230000004622 sleep time Effects 0.000 claims description 5
- 238000012163 sequencing technique Methods 0.000 claims description 3
- 230000002618 waking effect Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses an access control method in the field of the Internet of things of power equipment, which comprises the following steps: firstly, a power equipment internet of things base station broadcasts access control information to terminal equipment in a network at fixed time in a specific channel, wherein the control information comprises hop count, frame sequence number and control information, and meanwhile, the specific channels form a specific frequency point list which is stored in the base station and the terminal equipment; the method provides two access modes, namely an access mode of finding out-of-step sweep frequency random access after the sensor equipment wakes up, and an access mode of directly omitting an access flow according to DRX scheduling, so that signal interference in the environment is avoided, a reliable access mode is provided for the power terminal equipment, the power consumption of the sensor in the access process is reduced, and reliable connection can be provided once the sensor is out-of-step, thereby meeting the complex environmental change and low power consumption requirements of the Internet of things of the power equipment.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to an access control method in the field of the Internet of things of the power equipment.
Background
The power equipment internet of things is an application of the internet of things in the smart grid, is a result of development of information communication technology to a certain stage, effectively integrates communication infrastructure resources and power system infrastructure resources, improves informatization level of a power system, improves utilization efficiency of the existing infrastructure of the power system, and provides important technical support for links such as power grid generation, transmission, transformation, distribution and electricity utilization.
In the internet of things of power equipment, a sensor terminal device sends collected data to a base station mainly belongs to a sensing layer, at present, the collected monitoring data mainly adopts modes such as optical fiber communication and the like, and meanwhile, some services are communicated in a power line carrier or wireless mode and the like. Because of the complex working environment, many devices require batteries to supply power for a long period of time, because the geographic location and working environment cannot provide external power to them, and the cost of replacing batteries is also prohibitive. Therefore, a low-power consumption and reliable access mode is a key requirement for continuous operation of the electric power Internet of things equipment.
The signaling interaction of the access mode of the current wireless communication technology is complex, and the terminal equipment is required to be accessed again after each awakening, so that more power resources are required to be consumed, and the low power consumption requirement of the power terminal equipment cannot be met.
Disclosure of Invention
The invention aims to provide an access control method in the field of the Internet of things of power equipment, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: an access control method in the field of the Internet of things of power equipment comprises the following steps:
(1) Control signal access: firstly, an internet of things base station of power equipment regularly broadcasts access control information to terminal equipment in a network in a specific channel, wherein the control information comprises hop count and frame sequence number, and meanwhile, the specific channel forms a specific frequency point list;
(2) Terminal equipment wakes up: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message cannot be received, scanning is performed on a specific channel in the frequency point list, after the scanning is finished, weight sorting is performed, then the channel is selected to be accessed preferentially, after the access, the base station sends sleep time (DRX period) to the terminal equipment, after the terminal receives the DRX message, the frame sequence number in the current broadcast message is recorded, the terminal equipment goes to sleep, and wakes up again after the set time;
(3) Omitting the access flow: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message can be received, comparing the frame sequence number in the broadcast message with the DRX time received last time, if the first frame sequence number is received this time, the last frame sequence number before last sleep, the DRX time = acceptable threshold value, omitting an access flow, directly sending sensor service data to a base station, waiting for the next DRX period, and entering sleep after receiving DRX and sending the service data;
(4) And (3) re-accessing the flow: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message can be received, but the first frame number, the last frame number before last sleep and the DRX time are not equal to an acceptable threshold value, re-access is performed, the terminal sends a random access request to the base station, and after receiving a communication address allocated by the base station, confirmation information is exerted, and the access flow is completed.
Preferably, in the step (1), the frequency point list is composed of specific frequency points within 470MHz to 510MHz, and the composed frequency point list is stored in the base station and the terminal device.
Preferably, in the step (1), the frequency point of the base station must be in the frequency point list of the terminal.
Preferably, in the step (2), the signal strength RSSI and the hop count of the received signal are calculated according to a specific formula, and the calculated score is used as a basis for weight ranking.
Preferably, in the step (2), the method for calculating the weight value is as follows: firstly, according to the signal strength (RSSI) obtained in the frequency point scanning process, the frequency points in the channel list are divided into four grades, and the corresponding scores are 128, 64, 32 and 16 respectively. And then taking the value obtained by subtracting the hop count in the scanning BCH from the score as a final weight value, and sorting the weight value of each channel after the scanning is finished.
Preferably, in the step (3), the method of omitting the access procedure is that the base station sends a DRX cycle (DRXTime) to the terminal after the terminal is accessed, which tells the terminal that it should wake up again after the corresponding time.
Preferably, in the step (3), the terminal records the frame number (FrameIdx 1) of the last broadcast signal before sleeping, and records the frame number (FrameIdx 2) of the first broadcast signal after waking up next time.
Preferably, in the step (3), whether the re-access is needed is determined by the formula |frameidx2-FrameIdx1-drxtime| < acceptable threshold (Delta), if the formula is satisfied, the access procedure is directly omitted, and if the formula is not satisfied, the terminal sends a random access request to re-access.
Preferably, in the step (4), the terminal device sends the collected sensor service data after completing the access procedure, receives the DRX cycle, and then enters a sleep state.
Compared with the prior art, the invention has the following beneficial effects:
the method provides two access modes, namely an access mode of finding out-of-step sweep frequency random access after the sensor equipment wakes up, and an access mode of directly omitting an access flow according to DRX scheduling, so that signal interference in the environment is avoided, a reliable access mode is provided for the power terminal equipment, the power consumption of the sensor in the access process is reduced, and reliable connection can be provided once the sensor is out-of-step, thereby meeting the complex environmental change and low power consumption requirements of the Internet of things of the power equipment.
Drawings
Fig. 1 is a flow chart of the operation of the device in the power terminal of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An access control method in the field of the Internet of things of power equipment comprises the following steps:
(1) Control signal access: firstly, an internet of things base station of power equipment regularly broadcasts access control information to terminal equipment in a network in a specific channel, wherein the control information comprises hop count and frame sequence number, and meanwhile, the specific channel forms a specific frequency point list;
(2) Terminal equipment wakes up: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message cannot be received, scanning is performed on a specific channel in the frequency point list, after the scanning is finished, weight sorting is performed, then the channel is selected to be accessed preferentially, after the access, the base station sends sleep time (DRX period) to the terminal equipment, after the terminal receives the DRX message, the frame sequence number in the current broadcast message is recorded, the terminal equipment goes to sleep, and wakes up again after the set time;
(3) Omitting the access flow: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message can be received, comparing the frame sequence number in the broadcast message with the DRX time received last time, if the first frame sequence number is received this time, the last frame sequence number before last sleep, the DRX time = acceptable threshold value, omitting an access flow, directly sending sensor service data to a base station, waiting for the next DRX period, and entering sleep after receiving DRX and sending the service data;
(4) And (3) re-accessing the flow: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message can be received, but the first frame number, the last frame number before last sleep and the DRX time are not equal to an acceptable threshold value, re-access is performed, the terminal sends a random access request to the base station, and after receiving a communication address allocated by the base station, confirmation information is exerted, and the access flow is completed.
Embodiment one:
an access control method in the field of the Internet of things of power equipment comprises the following steps:
(1) Control signal access: firstly, an internet of things base station of power equipment regularly broadcasts access control information to terminal equipment in a network in a specific channel, wherein the control information comprises hop count, frame sequence number and control information, and meanwhile, the specific channel forms a specific frequency point list which consists of specific frequency points in 470 MHz-510 MHz, the formed frequency point list is stored in the base station and the terminal equipment, and the frequency points of the base station are required to be in the frequency point list of the terminal, so that the terminal cannot scan the frequency points of the base station, and the access is prevented;
(2) Terminal equipment wakes up: after the sensor terminal equipment wakes up, if the sensor terminal equipment can not receive the broadcast message, scanning is performed on a specific channel in the frequency point list, after the scanning is finished, weight sorting is performed, then the channel is selected to access preferentially, after the access, the base station can send sleep time (DRX period) to the terminal equipment, after the terminal receives the DRX message, the frame sequence number in the current broadcast message is recorded, the terminal equipment wakes up again after the set time, the signal strength RSSI and the hop count of the received signal are calculated according to a specific formula, and the calculation method of the weight value is as follows: firstly, according to the signal strength (RSSI) obtained in the frequency point scanning process, the frequency points in the channel list are divided into four grades, and the corresponding scores are 128, 64, 32 and 16 respectively. Then the value obtained by subtracting the hop count in the scanning BCH from the score is used as a final weight value, and after the scanning is finished, the weight value of each channel is sequenced, so that the calculation accuracy of the weight value can be increased, and the sensor terminal equipment can be conveniently and preferentially accessed according to the sequencing;
(3) Omitting the access flow: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message can be received, comparing the frame sequence number in the broadcast message with the DRX time received last time, if the first frame sequence number is received this time, the last frame sequence number before last sleep, the DRX time = acceptable threshold value, omitting an access flow, directly sending sensor service data to a base station, waiting for the next DRX period, and entering sleep after receiving DRX and sending the service data;
(4) And (3) re-accessing the flow: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message can be received, but the first frame number, the last frame number before last sleep and the DRX time are not equal to an acceptable threshold value, re-access is performed, the terminal sends a random access request to the base station, and after receiving a communication address allocated by the base station, confirmation information is exerted, and the access flow is completed.
Embodiment two:
an access control method in the field of the Internet of things of power equipment comprises the following steps:
(1) Control signal access: firstly, an internet of things base station of power equipment regularly broadcasts access control information to terminal equipment in a network in a specific channel, wherein the control information comprises hop numbers and frame numbers, meanwhile, the specific channel forms a specific frequency point list, the frequency point list consists of specific frequency points in 470 MHz-510 MHz, the formed frequency point list is stored in the base station and the terminal equipment, and the frequency points of the base station are required to be in the frequency point list of the terminal, so that the terminal cannot scan the frequency points of the base station, and the access is prevented;
(2) Terminal equipment wakes up: after the sensor terminal equipment wakes up, if the sensor terminal equipment can not receive the broadcast message, scanning is performed on a specific channel in the frequency point list, after the scanning is finished, weight sorting is performed, then the channel is selected to access preferentially, after the access, the base station can send sleep time (DRX period) to the terminal equipment, after the terminal receives the DRX message, the frame sequence number in the current broadcast message is recorded, the terminal equipment wakes up again after the set time, the signal strength RSSI and the hop count of the received signal are calculated according to a specific formula, and the calculation method of the weight value is as follows: firstly, according to the signal strength (RSSI) obtained in the frequency point scanning process, the frequency points in the channel list are divided into four grades, and the corresponding scores are 128, 64, 32 and 16 respectively. Then the value obtained by subtracting the hop count in the scanning BCH from the score is used as a final weight value, and after the scanning is finished, the weight value of each channel is sequenced, so that the calculation accuracy of the weight value can be increased, and the sensor terminal equipment can be conveniently and preferentially accessed according to the sequencing;
(3) Omitting the access flow: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message can be received, comparing the frame sequence number in the broadcast message with the DRX time received last time, if the first frame sequence number is received this time, the last frame sequence number before last sleep, the DRX time = acceptable threshold value, omitting the access flow, directly sending sensor service data to the base station, waiting for the next DRX period, after receiving the DRX and sending the service data, going to sleep, omitting the access process, wherein the method is that the base station sends the DRX period (DRX time) to the terminal after the terminal is accessed, telling the terminal to wake up again after the corresponding time, recording the frame sequence number (FrameIdx 1) of the last broadcast signal before sleeping, and after the next wake-up, recording the frame sequence number (FrameIdx 2) of the first broadcast signal, judging whether the re-access is needed or not through the formula, if the formula is met, directly accessing, and if the formula is not met, sending a random access request to re-access is omitted;
(4) And (3) re-accessing the flow: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message can be received, but the first frame number is received, the last frame number before last sleep is not equal to an acceptable threshold value, re-access is performed, the terminal sends a random access request to the base station, then the terminal equipment receives a communication address allocated by the base station, then confirmation information is exerted, the access process is completed, the terminal equipment sends collected sensor service data after the access process is completed, and receives a DRX period, and then enters a sleep state.
The given access scene is an electric power terminal device and an access node, the acceptable threshold value when in access is delta=10s, and the specific access steps are as follows:
(1) The last time the power terminal equipment receives a broadcast message frame sequence number frameidx1=538, the received DRX period is 300(s), and the power terminal equipment enters sleep after the terminal equipment transmits data;
(2) When the power terminal equipment wakes up according to the DRX period received last time, the received broadcast message frame sequence number is frameIdx2=833;
(3) The terminal can omit the access process according to the above formula by the frame idx2-frame idx 1-drxtime= |833-538-300|=5 < delta=10;
(4) And the terminal receives the next DRX period after awakening for 5s, transmits the acquired service data, and then enters a sleep state.
The method provides two access modes, namely an access mode of finding out-of-step sweep frequency random access after the sensor equipment wakes up, and an access mode of directly omitting an access flow according to DRX scheduling, so that signal interference in the environment is avoided, a reliable access mode is provided for the power terminal equipment, the power consumption of the sensor in the access process is reduced, and reliable connection can be provided once the sensor is out-of-step, thereby meeting the complex environmental change and low power consumption requirements of the Internet of things of the power equipment.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An access control method in the field of the Internet of things of power equipment is characterized by comprising the following steps of: the method comprises the following steps:
(1) Control signal access: firstly, an internet of things base station of power equipment regularly broadcasts access control information to terminal equipment in a network in a specific channel, wherein the control information comprises hop count and frame sequence number, and meanwhile, the specific channel forms a specific frequency point list;
(2) Terminal equipment wakes up: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message cannot be received, scanning is performed on a specific channel in the frequency point list, after the scanning is finished, weight sorting is performed, then the channel is selected for access, after the access, the base station sends sleep time to the terminal equipment, after the terminal receives the DRX period, the frame sequence number in the current broadcast message is recorded, the terminal enters sleep, and after the set time, the terminal equipment wakes up again;
(3) Omitting the access flow: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message can be received, comparing the frame sequence number in the broadcast message with the DRX period received last time, if the I number of the first frame sequence number which is received this time, the last frame sequence number which is not more than the acceptable threshold value which is not more than the DRX period which is last before sleeping, omitting an access flow, directly sending sensor service data to a base station, waiting for the next DRX period, and entering sleep after the DRX period is received and the service data is sent;
(4) And (3) re-accessing the flow: after the sensor terminal equipment wakes up, if the sensor terminal equipment finds that the broadcast message can be received, but I receives the first frame number, the last frame number before last sleep, and the DRX period I > an acceptable threshold value, re-access is performed, the terminal sends a random access request to the base station, and then sends a confirmation message after receiving the communication address allocated by the base station, and the access flow is completed.
2. The power equipment internet of things field access control method according to claim 1, wherein the method comprises the following steps: in the step (1), the frequency point list consists of specific frequency points within 470-510 MHz, and the formed frequency point list is stored in the base station and the terminal equipment.
3. The power equipment internet of things field access control method according to claim 1, wherein the method comprises the following steps: in the step (1), the frequency point of the base station must be in the frequency point list of the terminal.
4. The power equipment internet of things field access control method according to claim 1, wherein the method comprises the following steps: in the step (2), the signal strength RSSI and the hop count of the received signal are calculated according to a specific formula, and the calculated score is used as a basis for weight ranking.
5. The power equipment internet of things field access control method according to claim 1, wherein the method comprises the following steps: in the step (2), the method for calculating the weight value is as follows: firstly, according to the signal strength (RSSI) obtained in the frequency point scanning process, dividing the frequency points in a channel list into four grades, wherein the corresponding scores are 128, 64, 32 and 16 respectively, then subtracting the hop count in a scanning BCH from the score to obtain a value as a final weight value, and after the scanning is finished, sequencing the weight values of each channel.
6. The power equipment internet of things field access control method according to claim 1, wherein the method comprises the following steps: in the step (3), the method of omitting the access process is that the base station sends a DRX cycle, i.e. a DRXTime, to the terminal after the terminal is accessed, which tells the terminal that it should wake up again after the corresponding time.
7. The power equipment internet of things field access control method according to claim 6, wherein: in the step (3), the terminal records the frame number of the last broadcast signal, i.e. FrameIdx1, before sleeping, and records the frame number of the first broadcast signal, i.e. FrameIdx2, after waking up next time.
8. The power equipment internet of things field access control method according to claim 1, wherein the method comprises the following steps: in the step (4), the terminal device sends the collected sensor service data after completing the access process, receives the DRX cycle, and then enters a sleep state.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105282835A (en) * | 2014-06-20 | 2016-01-27 | 苹果公司 | Wlan system with opportunistic transitioning to a low power state for power management |
| KR20170114258A (en) * | 2016-04-01 | 2017-10-13 | 주식회사 케이티 | Methods for performing handover and Apparatuses thereof |
| CN109151957A (en) * | 2017-06-28 | 2019-01-04 | 珠海市魅族科技有限公司 | Communication means and communication device, the communication equipment of WLAN |
| CN112087790A (en) * | 2019-06-14 | 2020-12-15 | 海信集团有限公司 | Control channel detection method and device applied to Internet of things and storage medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017050586A1 (en) * | 2015-09-25 | 2017-03-30 | Sony Corporation | Wireless telecommunications system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105282835A (en) * | 2014-06-20 | 2016-01-27 | 苹果公司 | Wlan system with opportunistic transitioning to a low power state for power management |
| KR20170114258A (en) * | 2016-04-01 | 2017-10-13 | 주식회사 케이티 | Methods for performing handover and Apparatuses thereof |
| CN109151957A (en) * | 2017-06-28 | 2019-01-04 | 珠海市魅族科技有限公司 | Communication means and communication device, the communication equipment of WLAN |
| CN112087790A (en) * | 2019-06-14 | 2020-12-15 | 海信集团有限公司 | Control channel detection method and device applied to Internet of things and storage medium |
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