CN108834213A - Low downlink delays communication means and system in a kind of Internet of Things - Google Patents
Low downlink delays communication means and system in a kind of Internet of Things Download PDFInfo
- Publication number
- CN108834213A CN108834213A CN201810300787.1A CN201810300787A CN108834213A CN 108834213 A CN108834213 A CN 108834213A CN 201810300787 A CN201810300787 A CN 201810300787A CN 108834213 A CN108834213 A CN 108834213A
- Authority
- CN
- China
- Prior art keywords
- gateway
- internet
- things
- timeslice
- communication means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W68/02—Arrangements for increasing efficiency of notification or paging channel
-
- 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
- H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention belongs to Internet of Things field of communication technology, the low downlink delays communication means and system in a kind of Internet of Things are disclosed, the request that networks is sent, sends networking response；Request, the response internally received, is judged, is networked；Carry out timeslice poll；Different nodes under same gateway are arranged at different timeslices and carry out data active reporting in turn；When being waken up, opens and receive window for detecting lead code；Lead code is received, continues open reception window, receives paging instructions；Paging instructions are received, corresponding page response frame is organized and is put into competition queue, are sent when to competition timeslice；Later, detect whether now whether be itself active reporting timeslice.Low downlink delays communication means based on LoRa of the invention can progress gateway more faster than LoRaWAN to the downlink communication of terminal node, the paging of LoRa gateway can most be responded in 2 seconds fastly.
Description
Technical field
The invention belongs to the low downlink delays communication means in Internet of Things field of communication technology more particularly to a kind of Internet of Things
And system.
Background technique
Currently, the prior art commonly used in the trade is such：The LoRa communication technology is a kind of super remote based on spread spectrum
Range wireless transmission technology.LoRa has many advantages, such as that long transmission distance, ability through walls are high, low in energy consumption, will be used wider and wider.
LoRaWAN is the LoRa technology low-power consumption wide area network specification released by LoRa alliance, defines LoRa communication specification and use
The structure of network when physical layer of the LoRa as long-distance communication links.But LoRaWAN also has some disadvantages, such as downlink passes
Defeated low efficiency etc..Currently, the data transmission system of LoRaWAN includes server, gateway and terminal, there are 8 uplinks
Road and 1 downlink are sent with 8 terminals to the link of gateway transmission data and 1 gateway to terminal
The link of data.When downlink transmission data, i.e., when gateway receives server and is handed down to the data of each terminal, especially
It is the biggish data of data volume, such as software version or configuration file, gateway is by unique 1 downlink by data
It is handed down to each terminal, since the transmission rate of LoRaWAN is low, this will occupy downlink for a long time, so that LoRaWAN long
Time can not transmit other data.
In conclusion problem of the existing technology is：
(1) downlink transmission rate of LoRaWAN is low, occupies downlink for a long time, can make LoRaWAN that can not transmit
Other data.
(2) ClassA carries out uplink using asynchronous ALOHA agreement, as long as terminal node has data to send, to the greatest extent
Pipe allows them to send.If receiving response in the stipulated time, expression is sent successfully, is otherwise retransmitted.Although this agreement is simple and easy, can
To send at any time, but it is easy to generate conflict.
(3) three kinds of communication terminal Class A/B/C defined in existing LoRaWAN agreement not can be implemented simultaneously low function
Consumption and low downlink delays.
Solve the meaning of above-mentioned technical problem：A kind of gateway and terminal communicating method different from LoRaWAN is designed, with reality
Now progress gateway more faster than LoRaWAN can satisfy some pairs of downlink real-time demands more to the downlink communication of terminal node
High scene demand.Simultaneously in this method, each terminal node under gateway exclusively enjoys one and reports timeslice, although with entering
The report cycle of the increase of network termination node, each terminal node can be elongated, but also avoid simultaneously terminal node it is any on
Report the conflict generated.
Summary of the invention
In view of the problems of the existing technology, the present invention provides in a kind of Internet of Things low downlink delays communication means and
System.,
The invention is realized in this way the low downlink delays communication means in a kind of Internet of Things, including：
Terminal node sends the request that networks to gateway by CH0 channel；After gateway receives request, networking response is sent, is answered
Answer the essential information in frame comprising gateway；Multiple gateways are had in Probability Area receiving request Concurrency and send response, terminal node is received
To after response, judged according to the various information of gateway, one of gateway is selected to send the confirmation that networks, completes to network.
After networking, terminal node is into 2 seconds timeslice poll patterns for a timeslice, (the time leaf length of 2s could
Configuration).Different nodes under same gateway carry out data active reporting being arranged at different timeslices in turn.In this phase
Between, when being waken up within every 2 seconds, only MCU is active, and other parts are still in sleep state, as long as no other tasks,
It will soon be again introduced into sleep, therefore power consumption is extremely low.
When being waken up, terminal node can open the reception window of 4ms for detecting lead code；If had received leading
Code then will continue to open reception window, receive paging instructions；If having received paging instructions, corresponding paging can be organized and rung
It answers frame to be put into competition queue, is sent when to competition timeslice.Later, can detect whether be itself active reporting now
Timeslice, if it is, carry out active reporting.Next, can detect whether to reach competition timeslice, if it is, by competing
The data striven in queue are successfully to be sent in competitive channel.
Further, terminal node networking, reported data, reception paging data use tri- channels of CH0, CHx, CHy respectively,
The specific frequency range of three channels configures in a certain range.
Further, gateway is instructed by downlink page and communicates relevant spreading factor SF, channel frequency to terminal node LoRa
The parameter of section is modified, and is carried out active time calibration to terminal node by downlink page instruction, is forced to restart or logout
Operation.
Another object of the present invention is to provide a kind of objects for realizing the low downlink delays communication means in the Internet of Things
Connected network communication system.
In conclusion advantages of the present invention and good effect are：Low downlink delays communication party based on LoRa of the invention
Method more faster than LoRaWAN can carry out downlink communication of the gateway to terminal node, characteristic and stability based on LoRa chip
The considerations of, the paging of LoRa gateway can most be responded in 2 seconds fastly.Simultaneously in this method, each end under gateway
End node exclusively enjoys one and reports timeslice, although with the increase of networking terminal node, the report cycle meeting of each terminal node
It is elongated, but the conflict that terminal node arbitrarily reports generation is also avoided simultaneously.
Detailed description of the invention
Fig. 1 is the low downlink delays communication means flow chart in Internet of Things provided in an embodiment of the present invention.
Fig. 2 is the low downlink delays communication means schematic diagram in Internet of Things provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Three kinds of communication terminal Class A/B/C defined in existing LoRaWAN agreement not can be implemented simultaneously low-power consumption
With low downlink delays.The transmission rate of LoRaWAN is low, occupies downlink for a long time, so that LoRaWAN for a long time can not
Transmit other data.Terminal node networking, reported data receive paging data and use tri- channels of CH0, CHx, CHy respectively, and three
The specific frequency range of a channel can configure in a certain range.
As shown in Figure 1, the low downlink delays communication means in Internet of Things provided in an embodiment of the present invention specifically includes：
S101：Terminal node sends the request that networks to gateway by CH0 channel；After gateway receives request, sends to network and answer
It answers, includes the essential information of gateway in acknowledgement frame；Multiple gateways are had in Probability Area receive request Concurrency send response, terminal section
After point receives response, judged according to the various information of gateway, one of gateway selected to send the confirmation that networks, complete into
Net.
S102：After networking, terminal node enters the timeslice poll pattern (timeslice of 2s with 2 seconds for a timeslice
Length is configurable).Different nodes under same gateway carry out data active reporting being arranged at different timeslices in turn.?
During this, when being waken up within every 2 seconds, only MCU is active, and other parts are still in sleep state, as long as no other
Task will soon be again introduced into sleep, therefore power consumption is extremely low.
S103：When being waken up, terminal node can open the reception window of 4ms for detecting lead code；If received
Lead code, then will continue to it is open receive window, receive paging instructions；If having received paging instructions, can organize corresponding
Page response frame is put into competition queue, is sent when to competition timeslice.Later, can detect whether be itself master now
The dynamic timeslice reported, if it is, carrying out active reporting.Next, can detect whether to reach competition timeslice, if so,
It is then successfully to send in competitive channel by the data competed in queue.
Terminal node networking, reported data, reception paging data use tri- channels of CH0, CHx, CHy, three letters respectively
The specific frequency range in road can configure in a certain range, to adapt to the use of different regions.
The principle and formula in LoRa chip datasheet provided according to semtech company, utilizes rssi, snr, SF
Etc. parameters, the exact time synchronization between terminal node and gateway can be carried out, time synchronization can be paged when networking with gateway
Instruction carries out when requiring.
Gateway can be instructed by downlink page and communicate relevant spreading factor SF, channel bands etc. to terminal node LoRa
Parameter is modified, and is carried out active time calibration to terminal node by downlink page instruction, is forced to restart or the operation such as logout.
Low downlink delays communication means based on LoRa of the invention can progress gateway more faster than LoRaWAN to terminal
The downlink communication of node can most seek LoRa gateway in 2 seconds fastly based on the considerations of the characteristic and stability of LoRa chip
It exhales and is responded.But also therefore sacrifice the efficiency of part uplink communication：When the terminal node of a gateway management is more, these
The period that terminal node carries out active reporting is longer.But it calls time on one because each terminal node under gateway exclusively enjoys
Piece, while also avoiding the conflict that terminal node in LoRaWAN arbitrarily reports generation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. the low downlink delays communication means in a kind of Internet of Things, which is characterized in that the low downlink delays in the Internet of Things are logical
Letter method includes：
The request that networks is sent, networking response is sent；Request, the response internally received, is judged, is networked；
Carry out timeslice poll；Different nodes under same gateway are arranged at different timeslices and carry out in data active in turn
Report；
When being waken up, opens and receive window for detecting lead code；Lead code is received, open reception window is continued, reception is sought
Exhale instruction；Paging instructions are received, corresponding page response frame is organized and is put into competition queue, are sent when to competition timeslice；
Later, detect whether now whether be itself active reporting timeslice；It is then to carry out active reporting；Next, detecting whether
Reach competition timeslice；It is to send the data competed in queue in competitive channel.
2. the low downlink delays communication means in Internet of Things as described in claim 1, which is characterized in that the request that networks is sent,
Send networking response；Request, the response internally received, is judged, is networked；It specifically includes：Terminal node by CH0 channel to
Gateway sends the request that networks；After gateway receives request, networking response is sent, includes the essential information of gateway in acknowledgement frame；It may
It has multiple gateways in region to receive after request Concurrency send response, terminal node to receive response, according to the various information of gateway
Judged, one of gateway is selected to send the confirmation that networks, completes to network.
3. the low downlink delays communication means in Internet of Things as described in claim 1, which is characterized in that carry out timeslice wheel
It askes；Different nodes under same gateway are arranged at different timeslices and carry out data active reporting in turn；It specifically includes：It networks
Afterwards, terminal node enters the timeslice poll pattern with 2 seconds for a timeslice；Different nodes under same gateway are being arranged
Piece carries out data active reporting in turn in different times；When being waken up within every 2 seconds, only MCU is active, other parts
Still in sleep state.
4. the low downlink delays communication means in Internet of Things as claimed in claim 2, which is characterized in that terminal node networking,
Reported data, reception paging data use tri- channels of CH0, CHx, CHy respectively, and the specific frequency range of three channels is in a certain range
Interior configuration.
5. the low downlink delays communication means in Internet of Things as claimed in claim 2, which is characterized in that gateway is sought by downlink
Exhale instruction relevant spreading factor SF is communicated to terminal node LoRa, the parameter of channel bands is modified, pass through downlink page
It instructs to terminal node implementation active time calibration, pressure is restarted or the operation of logout.
6. a kind of Internet of Things network communication system for realizing the low downlink delays communication means in Internet of Things described in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810300787.1A CN108834213B (en) | 2018-04-04 | 2018-04-04 | Low-downlink delay communication method and system in Internet of things |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810300787.1A CN108834213B (en) | 2018-04-04 | 2018-04-04 | Low-downlink delay communication method and system in Internet of things |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108834213A true CN108834213A (en) | 2018-11-16 |
| CN108834213B CN108834213B (en) | 2022-04-22 |
Family
ID=64154337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810300787.1A Active CN108834213B (en) | 2018-04-04 | 2018-04-04 | Low-downlink delay communication method and system in Internet of things |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108834213B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110493856A (en) * | 2019-08-27 | 2019-11-22 | 南方电网科学研究院有限责任公司 | Data frame retransmission method, device, equipment and the storage medium of wireless network suspend mode |
| CN110492978A (en) * | 2019-08-13 | 2019-11-22 | 翱捷科技(深圳)有限公司 | A kind of LoRaWAN system and its implementation quickly confirmed |
| CN110690953A (en) * | 2019-12-06 | 2020-01-14 | 武汉慧联无限科技有限公司 | Downlink gateway selection method, device and computer storage medium |
| CN110831132A (en) * | 2019-11-01 | 2020-02-21 | 腾讯科技（深圳）有限公司 | Data processing method and equipment |
| CN110996379A (en) * | 2019-11-29 | 2020-04-10 | 哈尔滨海能达科技有限公司 | Wake-up method, terminal node, transmission source node, and storage medium |
| CN111130715A (en) * | 2019-12-13 | 2020-05-08 | 西北大学 | Lora wireless network and parameter optimization and transmission method and device thereof |
| CN111132291A (en) * | 2020-01-03 | 2020-05-08 | 中科芯集成电路有限公司 | LPWAN synchronous awakening mechanism based on LoRa |
| WO2020108326A1 (en) * | 2018-11-29 | 2020-06-04 | 阿里巴巴集团控股有限公司 | Information determination method, information judgment method, apparatus, and computing device |
| CN111405640A (en) * | 2020-03-09 | 2020-07-10 | 上海迈内能源科技有限公司 | Low-power-consumption wireless networking communication method |
| CN111565378A (en) * | 2019-02-14 | 2020-08-21 | 深圳长城开发科技股份有限公司 | LoRa communication method and LoRa communication system |
| CN111835629A (en) * | 2020-06-17 | 2020-10-27 | 浙江慧居智能家居有限公司 | Network data interaction method and system, and gateway |
| CN113692019A (en) * | 2021-09-16 | 2021-11-23 | 国网河北省电力有限公司电力科学研究院 | Wireless networking method and terminal of power Internet of things |
| CN115119216A (en) * | 2022-06-24 | 2022-09-27 | 深圳友讯达科技股份有限公司 | Constant-power-supply LoRaWAN network communication method and system |
| CN116132967A (en) * | 2023-01-10 | 2023-05-16 | 阿里云计算有限公司 | Network access method of terminal, communication method of terminal and base station and related equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016049872A1 (en) * | 2014-09-30 | 2016-04-07 | 华为技术有限公司 | Device and method for measuring network packet loss |
| CN106162844A (en) * | 2016-06-03 | 2016-11-23 | 西安电子科技大学 | Implementation method based on the MAC protocol for wireless sensor networks of LoRa |
| CN107222931A (en) * | 2017-07-10 | 2017-09-29 | 深圳市信锐网科技术有限公司 | A kind of LoRa communication means and system |
| CN107846355A (en) * | 2017-11-09 | 2018-03-27 | 深圳市中兴物联科技有限公司 | A kind of data gateway equipment |
-
2018
- 2018-04-04 CN CN201810300787.1A patent/CN108834213B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016049872A1 (en) * | 2014-09-30 | 2016-04-07 | 华为技术有限公司 | Device and method for measuring network packet loss |
| CN106162844A (en) * | 2016-06-03 | 2016-11-23 | 西安电子科技大学 | Implementation method based on the MAC protocol for wireless sensor networks of LoRa |
| CN107222931A (en) * | 2017-07-10 | 2017-09-29 | 深圳市信锐网科技术有限公司 | A kind of LoRa communication means and system |
| CN107846355A (en) * | 2017-11-09 | 2018-03-27 | 深圳市中兴物联科技有限公司 | A kind of data gateway equipment |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020108326A1 (en) * | 2018-11-29 | 2020-06-04 | 阿里巴巴集团控股有限公司 | Information determination method, information judgment method, apparatus, and computing device |
| CN111565378B (en) * | 2019-02-14 | 2024-04-19 | 深圳长城开发科技股份有限公司 | LoRa communication method and LoRa communication system |
| CN111565378A (en) * | 2019-02-14 | 2020-08-21 | 深圳长城开发科技股份有限公司 | LoRa communication method and LoRa communication system |
| CN110492978A (en) * | 2019-08-13 | 2019-11-22 | 翱捷科技(深圳)有限公司 | A kind of LoRaWAN system and its implementation quickly confirmed |
| CN110493856A (en) * | 2019-08-27 | 2019-11-22 | 南方电网科学研究院有限责任公司 | Data frame retransmission method, device, equipment and the storage medium of wireless network suspend mode |
| CN110493856B (en) * | 2019-08-27 | 2022-03-01 | 南方电网科学研究院有限责任公司 | Data frame retransmission method, device, equipment and storage medium for wireless network dormancy |
| CN110831132B (en) * | 2019-11-01 | 2022-04-12 | 腾讯科技（深圳）有限公司 | Data processing method and equipment |
| CN110831132A (en) * | 2019-11-01 | 2020-02-21 | 腾讯科技（深圳）有限公司 | Data processing method and equipment |
| CN110996379A (en) * | 2019-11-29 | 2020-04-10 | 哈尔滨海能达科技有限公司 | Wake-up method, terminal node, transmission source node, and storage medium |
| CN110690953A (en) * | 2019-12-06 | 2020-01-14 | 武汉慧联无限科技有限公司 | Downlink gateway selection method, device and computer storage medium |
| CN110690953B (en) * | 2019-12-06 | 2020-04-24 | 武汉慧联无限科技有限公司 | Downlink gateway selection method, device and computer storage medium |
| CN111130715A (en) * | 2019-12-13 | 2020-05-08 | 西北大学 | Lora wireless network and parameter optimization and transmission method and device thereof |
| CN111132291B (en) * | 2020-01-03 | 2022-09-27 | 中科芯集成电路有限公司 | LPWAN synchronous awakening method based on LoRa |
| CN111132291A (en) * | 2020-01-03 | 2020-05-08 | 中科芯集成电路有限公司 | LPWAN synchronous awakening mechanism based on LoRa |
| CN111405640B (en) * | 2020-03-09 | 2022-01-04 | 上海迈内能源科技有限公司 | Low-power-consumption wireless networking communication method |
| CN111405640A (en) * | 2020-03-09 | 2020-07-10 | 上海迈内能源科技有限公司 | Low-power-consumption wireless networking communication method |
| CN111835629A (en) * | 2020-06-17 | 2020-10-27 | 浙江慧居智能家居有限公司 | Network data interaction method and system, and gateway |
| CN113692019A (en) * | 2021-09-16 | 2021-11-23 | 国网河北省电力有限公司电力科学研究院 | Wireless networking method and terminal of power Internet of things |
| CN113692019B (en) * | 2021-09-16 | 2023-10-10 | 国网河北省电力有限公司电力科学研究院 | Wireless networking method and terminal of electric power Internet of things |
| CN115119216A (en) * | 2022-06-24 | 2022-09-27 | 深圳友讯达科技股份有限公司 | Constant-power-supply LoRaWAN network communication method and system |
| CN115119216B (en) * | 2022-06-24 | 2024-05-14 | 深圳友讯达科技股份有限公司 | LoRaWAN network communication method and system with constant power supply |
| CN116132967A (en) * | 2023-01-10 | 2023-05-16 | 阿里云计算有限公司 | Network access method of terminal, communication method of terminal and base station and related equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108834213B (en) | 2022-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108834213A (en) | Low downlink delays communication means and system in a kind of Internet of Things | |
| Ortín et al. | Augmenting LoRaWAN performance with listen before talk | |
| Leonardi et al. | RT-LoRa: A medium access strategy to support real-time flows over LoRa-based networks for industrial IoT applications | |
| Callebaut et al. | Cross-layer framework and optimization for efficient use of the energy budget of IoT nodes | |
| KR101617888B1 (en) | Method and apparatus of paging for high power saving reception mode m2m/mtc device communication in a mobile communication system | |
| CN101013912B (en) | Power control method for centralized wireless multihop access network | |
| Di Marco et al. | Modeling IEEE 802.15. 4 networks over fading channels | |
| US20090323697A1 (en) | Data payload transmission via control plane signaling | |
| CN105745945A (en) | Controlling data transmissions for machine type communications in a mobile communication system | |
| Goyal et al. | A stochastic model for beaconless IEEE 802.15. 4 MAC operation | |
| Magrin et al. | Performance analysis of LoRaWAN in industrial scenarios | |
| Ortín et al. | How do ALOHA and listen before talk coexist in LoRaWAN? | |
| CN102932919A (en) | Method and device for resource configuration of uplink sounding reference signal (SRS) | |
| Deng et al. | IEEE 802.11 ba wake-up radio: Performance evaluation and practical designs | |
| Korbi et al. | LoRaWAN analysis under unsaturated traffic, orthogonal and non-orthogonal spreading factor conditions | |
| WO2008094017A2 (en) | Method of transmitting and receiving a message associated with power saving mode in a wireles communication system | |
| Fedullo et al. | Adaptive LoRaWAN transmission exploiting reinforcement learning: The industrial case | |
| WO2001037494A3 (en) | Access spreading in a packet data radio system | |
| Jebril et al. | A systematic literature review on downlink frames in LoRaWAN | |
| Herrería-Alonso et al. | Enhancing LoRaWAN scalability with longest first slotted CSMA | |
| Heusse et al. | Performance of unslotted ALOHA with capture and multiple collisions in LoRaWAN | |
| CN114616870B (en) | Wake-up signaling during discontinuous reception periods | |
| JP7246412B2 (en) | Flexible paging procedure | |
| Barroca et al. | Performance enhancement of IEEE 802.15. 4 by employing RTS/CTS and frame concatenation | |
| CN109768848A (en) | A kind of rapid answer communication mechanism based in time slot neighbors discovery agreement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |