CN109618416A - A kind of reliable wireless broadcasting method of extensive low discharge data access - Google Patents
A kind of reliable wireless broadcasting method of extensive low discharge data access Download PDFInfo
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- CN109618416A CN109618416A CN201910078588.5A CN201910078588A CN109618416A CN 109618416 A CN109618416 A CN 109618416A CN 201910078588 A CN201910078588 A CN 201910078588A CN 109618416 A CN109618416 A CN 109618416A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 15
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 101100172132 Mus musculus Eif3a gene Proteins 0.000 claims abstract description 4
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- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Classifications
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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
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
-
- 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
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
- H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of reliable wireless broadcasting method of extensive low discharge data access, belongs to the communications field.The purpose of the present invention is overcoming the shortcomings of existing extensive low discharge communication in the application, a kind of method of the reliable radio broadcasting of effective extensive low discharge is provided, it is designed using the LoRa chip of the sx1276/1278 of semtech with the MAC layer of the ACK transmission mechanism of similar CSMA/CA a kind of and two priority classes mechanism and is designed including the network layer of communication range and two priority classes, carry out communication realization, and the advantage with reliable communication.
Description
Technical field
The present invention provides a kind of reliable wireless broadcasting method of extensive low discharge data access, belongs to the communications field.
Background technique
When mobile cellular network development is in 2G, 3G and 4G epoch, for the Internet of Things application for needing wide area to cover,
Such as logistic industry vehicle location and tracking or unattended system failure monitoring, be generally used traditional GPRS
Technology.
But the power consumption and cruising ability of GPRS data transmission unit (DTU:Data Transfer unit) are all not ideal enough,
And it is limited to the covering of GPRS network, just data cannot be transmitted using GPRS for no GPRS signal.
Before the new standard of mobile cellular network internet of things oriented is released, also there are many companies and organization development to compare GPRS
More low-power consumption and the alternative solution for being easy deployment, during some schemes are currently widely used, such as LoRa, FSK etc..
The major advantage of FSK is: it implements and is easier to, the better performances of antinoise and anti-attenuation.In middle low speed data
It is widely used in transmission.Most commonly with two frequency carrying binary ones and 0 double frequency FSK system.Disadvantage
It is that communication distance is shorter, anti-interference ability is poor, and power consumption is higher.
LoRa uses linear frequency modulation spread spectrum modulation technique, that is, maintains as FSK (frequency shift keying) modulates identical low-power consumption
Characteristic, and significantly increase communication distance, while improving network efficiency and eliminating interference, i.e., the end of different frequency expansion sequences
End will not interfere with each other being sent simultaneously using identical frequency.
Summary of the invention
The purpose of the present invention is overcoming the shortcomings of existing extensive low discharge communication in the application, provide a kind of effective
The method of the reliable radio broadcasting of extensive low discharge, utilizes the LoRa chip and a type of the sx1276/1278 of semtech
Communication realization, and the advantage with reliable communication are carried out like the method for CSMA/CA.
Detailed description of the invention
Fig. 1 is system structure diagram according to the present invention；
Fig. 2 is the reception figure of the CAD mode of LoRa according to the present invention；
Fig. 3 is MAC layer software flow pattern according to the present invention；
Fig. 4 is reliable broadcast frame format figure according to the present invention；
Specific embodiment
As shown in Figure 1, the present invention is divided into three layers, and physical layer is LoRa hardware, and software is divided into MAC layer and network layer.
One, physical layer
Physical layer uses LoRa (sx1276) chip, and low in energy consumption, communication distance is remote, strong antijamming capability, reliability
It is high.LoRa software carries out reception data using the mode of CAD.
CAD mode is used for periodic sounding channel activity, receives data again when detecting successfully.This mode is than obstruction
Reception pattern more power saving.
Two, MAC layer
MAC layer has used the transmission mechanism of similar CSMA/CA a kind of.
1. transmission mechanism
After sending device sends data, the ACK frame that receiving device can be waited to return, if sending device is in the super of setting
When the time in receive ACK frame, then return to success, otherwise at this moment can be retransmitted automatically according to the retransmission number of setting, such as
Fruit is more than that the maximum times of setting can return to failure.Receiving device can cross filter data after receiving data by address information, and certainly
The own consistent data in address are handled with regard to reception, are otherwise abandoned.
2. sending the control of priority
When having multiple equipment while sending, needing to control transmission priority prevents from conflicting.It sends priority and passes through contention
Window controls, and is having numerous device nodes all to want when sending data and channel idle: first passing through a DIFS
The duration of (Distributed Inter-frame Spacing distribution interframe gap), then, each node generate one
A random contention window (timer), carries out countdown, and the node terminated when end first timing carries out the transmission of data, other
Node freezes contention window, stops timing, and remember the remaining time, when the data of the node are sent completely, by one
The contention window of the time of a DIFS, other nodes restart and start timing, successively go down, until all nodes are sent out
It send and finishes.If node sends data after contention window timing and clashes with other nodes, the node clashed
A contention window is all randomly generated, continues countdown.
Contention window time calculation formula is as follows:
(random number % (keeping out of the way the number that window coefficient * sends failure)) * backoff unit coefficient
That the seed for the random number that random number uses is generated in software is rssi (the Received Signal that LoRa is obtained
Strength Indication received signal intensity instruction) generate random seed.
SIFS value is set as 3.
DIFS value is set as 10.
Keep out of the way window coefficient and is set as 15.
The number maximum value for sending failure is 14, if reaching 15 can be zeroed.
Backoff unit coefficient is set as 4.
Software realization process is shown in Fig. 3.
Three, network layer
1. communication range controls
In the case where communicating using multihop network, the hop count of multi-hop can be set, for controlling data transmission efficiency.
2. network layer sends two priority classes
NET network layer supports the two priority classes of two-stage, is realized by two message queues.When equipment sends data
When, different message queues is put into the pointer of data buffer zone by the difference of incoming priority parameters, sends task meeting
The preferential data for sending high-priority message queue, retransmit the data of low priority after high-priority message is sent,
Improve the reliability of data.
Claims (8)
1. a kind of reliable wireless broadcasting method of extensive low discharge data access characterized by comprising physical layer LoRa is hard
Part and software MAC layer and network layer.
2. physical layer according to claim 1, which is characterized in that use LoRa (sx1276) chip.
3. software MAC layer according to claim 1, which is characterized in that comprising ACK transmission mechanism and send priority control
System.
4. MAC layer ACK transmission mechanism according to claim 3, which is characterized in that after sending device sends data, meeting
The ACK frame for waiting receiving device to return returns to success if sending device receives ACK frame in the time-out time of setting, no
It at this moment can then be retransmitted automatically according to the retransmission number of setting, if it exceeds the maximum times of setting can return to failure.
With regard to reception processing, otherwise receiving device can cross the consistent data of filter data and oneself address after receiving data by address information
It abandons.
5. MAC layer according to claim 3 sends two priority classes, which is characterized in that used a kind of similar CSMA/CA
Avoidance mechanism.
6. network layer according to claim 1, which is characterized in that communication range control and network layer send priority control
System.
7. network layer communication scope control according to claim 6, which is characterized in that in the feelings communicated using multihop network
Under condition, the hop count of multi-hop can be set, for controlling data transmission efficiency.
8. network layer according to claim 6 sends two priority classes, which is characterized in that NET network layer supports two-stage
Two priority classes, realized by two message queues.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910078588.5A CN109618416A (en) | 2019-01-28 | 2019-01-28 | A kind of reliable wireless broadcasting method of extensive low discharge data access |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910078588.5A CN109618416A (en) | 2019-01-28 | 2019-01-28 | A kind of reliable wireless broadcasting method of extensive low discharge data access |
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| Publication Number | Publication Date |
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| CN109618416A true CN109618416A (en) | 2019-04-12 |
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| CN201910078588.5A Withdrawn CN109618416A (en) | 2019-01-28 | 2019-01-28 | A kind of reliable wireless broadcasting method of extensive low discharge data access |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11352035B1 (en) | 2021-01-13 | 2022-06-07 | East China Jiaotong University | Auxiliary monitoring system for traction substation |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090138715A1 (en) * | 2007-11-24 | 2009-05-28 | University Of Massachusetts | Wireless network security using randomness |
| CN102131268A (en) * | 2011-04-26 | 2011-07-20 | 上海左岸芯慧电子科技有限公司 | Improved globe entrepreneurship monitor (GEM) routing method |
| CN102202428A (en) * | 2011-04-27 | 2011-09-28 | 浙江工业大学 | Building energy consumption monitoring analysis system based on wireless sensor technology |
| CN102546839A (en) * | 2012-03-25 | 2012-07-04 | 沈阳通用软件有限公司 | Efficient and reliable software distribution method for large scale network |
| CN103476148A (en) * | 2013-09-24 | 2013-12-25 | 中国科学院上海微系统与信息技术研究所 | Wireless sensor network |
| CN106028350A (en) * | 2016-04-28 | 2016-10-12 | 北京大学深圳研究生院 | Wireless communication method and system for IOT(Internet of Things) |
| CN109088860A (en) * | 2018-07-20 | 2018-12-25 | 珠海许继芝电网自动化有限公司 | A kind of cross-safety zone data transmission scheduling method and system |
-
2019
- 2019-01-28 CN CN201910078588.5A patent/CN109618416A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090138715A1 (en) * | 2007-11-24 | 2009-05-28 | University Of Massachusetts | Wireless network security using randomness |
| CN102131268A (en) * | 2011-04-26 | 2011-07-20 | 上海左岸芯慧电子科技有限公司 | Improved globe entrepreneurship monitor (GEM) routing method |
| CN102202428A (en) * | 2011-04-27 | 2011-09-28 | 浙江工业大学 | Building energy consumption monitoring analysis system based on wireless sensor technology |
| CN102546839A (en) * | 2012-03-25 | 2012-07-04 | 沈阳通用软件有限公司 | Efficient and reliable software distribution method for large scale network |
| CN103476148A (en) * | 2013-09-24 | 2013-12-25 | 中国科学院上海微系统与信息技术研究所 | Wireless sensor network |
| CN106028350A (en) * | 2016-04-28 | 2016-10-12 | 北京大学深圳研究生院 | Wireless communication method and system for IOT(Internet of Things) |
| CN109088860A (en) * | 2018-07-20 | 2018-12-25 | 珠海许继芝电网自动化有限公司 | A kind of cross-safety zone data transmission scheduling method and system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11352035B1 (en) | 2021-01-13 | 2022-06-07 | East China Jiaotong University | Auxiliary monitoring system for traction substation |
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