CN104320411A - Virtual carrier sense networking communication method based on half-duplex channel - Google Patents
Virtual carrier sense networking communication method based on half-duplex channel Download PDFInfo
- Publication number
- CN104320411A CN104320411A CN201410630168.0A CN201410630168A CN104320411A CN 104320411 A CN104320411 A CN 104320411A CN 201410630168 A CN201410630168 A CN 201410630168A CN 104320411 A CN104320411 A CN 104320411A
- Authority
- CN
- China
- Prior art keywords
- message
- node
- virtual carrier
- duplex channel
- networking
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses an application layer networking communication method based on a half-duplex channel and provides a virtual carrier sense networking communication method based on the half-duplex channel, wherein a virtual carrier sense networking algorithm and a virtual carrier sense networking protocol are included. According to the virtual carrier sense networking algorithm, network nodes of sharing the half-duplex channel are logically divided into master nodes and slave nodes, the master nodes periodically send virtual carrier sense messages to the slave nodes through a drip timer, and the slave nodes match destination addresses of the received virtual carrier sense messages with networking node addresses of the slave nodes. According to the virtual carrier sense networking protocol, an interplate interface adopted for transmitting a protocol message is determined; the format of the protocol message is defined, and constituent elements of an interface message between an application layer and a link layer are stipulated; the message type of a networking control protocol is defined; the drip timer is realized. The virtual carrier sense networking communication method is applied to networking control software in a synchronous data voice transmission network, can increase the utilization rate of the half-duplex channel, provides enough handling capacity for application of synchronous data voice transmission, and achieves the reliable synchronous data voice transmission function in a network environment.
Description
Technical field
The present invention relates to group-net communication technical field, be specifically related to the virtual carrier sensing in wireless network communication group-net communication method based on half-duplex channel.
Background technology
Fix in the wild or in mobile command communication system, usually utilize the half-duplex channel of the low speed such as power line or radio station to carry out multinode networking.No matter set up serial type network, or Star Network or heterogeneous network, all communication nodes all share same transmission medium, introduce very important packet collisions rate and Media Competition based on the half-duplex channel group-net communication shared.The CSMA/CD method of physically based deformation carrier sense in legacy network cannot complete reliable collision detection because of the half-duplex characteristic of channel, adopt the method dividing slot transmission seriously can reduce the throughput of network, and the words being difficult to realize delay sensitive pass or simultaneous data and speech transmission.Some networking thoughts based on MAC layer improvement agreement are that MAC layer, before real data transport starts, completes channel competition by sending two short control frames.When a node is wanted to send grouping to other neighbor nodes, first it send the short control frame that a request by name sends (RTS), is used for announcing that imminent frame sends.After receiving RTS frame, destination node agrees to current communication by reply one the short control frame sending (CTS) that allows by name.Transmit leg, by intercepting CTS, can send its True Data grouping.What the mode of this " question-response " was artificial reduces channel utilization.And when application layer business is heavier, the collision loss of dividing into groups due to RTS/CTS or MAC layer back-off wait overlong time cause MAC layer data buffer storage to overflow, and True Data still can be caused to lose.
Summary of the invention
The present invention is in order to solve in simultaneous data and speech transmission network because Media Competition causes the problem of packet loss and the bad realization of simultaneous data and speech transmission, a kind of application layer group-net communication method based on half-duplex channel and software simulating thereof are proposed, under the prerequisite not reducing channel utilization, the packet collisions on shared medium is avoided, reliable simultaneous data and speech transmission function under realizing multiple node networking environment based on application layer.
The present invention realizes above-mentioned purpose by the following technical solutions.Based on the application layer group-net communication method of half-duplex channel, it is characterized in that, comprise virtual carrier sensing in wireless network communication organization algorithm and virtual carrier sensing in wireless network communication Networking protocol;
Described virtual carrier sensing in wireless network communication organization algorithm, its step is as follows:
1) share the network node of half-duplex channel and be divided into host node in logic and from node, the active that host node is responsible for virtual carrier sensing in wireless network communication message sends, from node passive listening; In any moment in network, only allow existence host node, host node is by Networking protocol dynamic-configuration;
2) host node adopts drip timer period to send virtual carrier sensing in wireless network communication message to from node, destination address in message goes round and begins again from 1 to N, from the destination address of virtual carrier sensing in wireless network communication message that node will receive, mate with the networking node address of self, if coupling, then start to send self ready True Data;
3) when being ready for sending simultaneous data and speech transmission bag from node or without ready application data, described simultaneous data and speech transmission bag is equal to pure voice packets, must send PTT in advance take request message and wait for that PTT takies acknowledgement message from node; After from node listens to acknowledgement message, switch to host node by from node, simultaneously original host node receives PTT and takies request message and send after PTT takies acknowledgement message, switches to from node by oneself by host node;
Described virtual carrier sensing in wireless network communication Networking protocol, its step is as follows:
1) inter-board interface that protocol massages transmission adopts is determined;
2) protocol massages form is defined, and the component of interface message between given application layer and link layer;
3) definitions section network control protocol message types;
4) realize drip timer, comprising: determine the transmitted in packets time; According to timing cycle configuration timing accuracy; Drip policy selection.
Further, described virtual carrier sensing in wireless network communication message is divided into True Data to intercept message and idle listening message; True Data intercepts message carrier signaling bag, simultaneous data and speech transmission bag and packet; Idle listening message carrying idle packet.
Further, described inter-board interface adopts network interface or serial ports.
Further, described interface message is made up of heading, transmitting-receiving address, type, length, text and verification key element.
Further, described type of message takies 1 byte, and high 4 reservations of byte, are resolved by link layer for low 4, has worked in coordination with networking and has controlled.
Further, the described transmitted in packets time affects by line theory transmission rate, application layer and link layer interface speed and link layer bag processing time.
Further, described timing cycle configuration timing accuracy is less than the transmitted in packets time.
Further, described drip strategy adopts the drip strategy that accelerating network is restrained or the drip strategy transmitted as required.
Further, the drip strategy of described accelerating network convergence, namely when network topology quite stable, the timing cycle sending idle packet is elongated; When network topology change needs synchronization parameter, the timing cycle sending idle packet shortens, but is greater than the transmitted in packets time.
Further, the described drip strategy transmitted as required, namely any instant needs transporting speech bag, and timing cycle shortens and reduces speech time delay, but is greater than the transmitted in packets time; Any instant need transmit packet, the elongated raising efficiency of transmission of timing cycle.
The virtual carrier sensing in wireless network communication network-building method that the present invention proposes based on half-duplex channel is applied to networking control software design in simultaneous data and speech transmission network, the utilance of half-duplex channel can be improved, and then for simultaneous data and speech transmission application enough throughputs are provided, reliable simultaneous data and speech transmission function under completing network environment, be applicable to carry out networking based on power line or Radio Half-duplex and complete simultaneous data and speech transmission occasion between multiple node, as command communications system or mobile command communication system are fixed in field.
Accompanying drawing explanation
Fig. 1 is the connected in series lower half-duplex channel network topology structure figure in the present invention.
Fig. 2 is half-duplex channel network topology structure figure under the Y-connection in the present invention.
Fig. 3 is the network node hardware and software interface diagram in the present invention.
Fig. 4 is the virtual carrier sensing in wireless network communication organization algorithm flow chart in the present invention.
Fig. 5 is the Networking protocol software simulating flow chart in the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.See Fig. 1 to Fig. 5, based on the virtual carrier sensing in wireless network communication group-net communication method of half-duplex channel, be applicable to fix command communications system or the mobile command communication system based on radio station based on the field of power line transmission, complete simultaneous data and speech transmission between multiple node by networking.Virtual carrier sensing in wireless network communication organization algorithm and Networking protocol thereof are applicable to the network topology of connected in series 100 or star-like connection 200.
As shown in Figure 1, when connected in series 100, host node 101 and be articulated to same power line from node 102; As shown in Figure 2, during star-like connection 200, host node 101 is connected to from node 102 point by many power line connection point.
As shown in Figure 3, described virtual carrier sensing in wireless network communication Networking protocol is by communication node software simulating and run on hardware, and communication node software and hardware is divided into application layer 311, link layer 312 and physical layer 313.The application CPU 301 hardware being positioned at application layer 311 is interconnected by inter-board interface with the link CPU 302 being positioned at link layer 312, and physical layer 313 provides the line interface 303 such as power line binding post or radio antenna interface, and line interface 303 comprises binding post and antenna.Application CPU software 304 comprises signaling bag, packet and simultaneous data and speech transmission bag, mainly completes encapsulation, parsing that True Data intercepts message, and controls the transmission that True Data intercepts message and idle listening message; The simultaneously channel status message that sends over of receiver CPU software 305.Link CPU software 305 comprises linking status machine and drip timer, is responsible for the maintenance of Link State and drip timer, and what control idle listening message intercepts the transparent transmission of message with True Data.Chip firmware 306 controls the modulation and demodulation of power line or radio signals.
As shown in Figure 4, the operation principle of virtual carrier sensing in wireless network communication networking is: host node 101 is after application layer 311 sends beginning 401, judge that True Data intercepts message whether ready 402, intercept message 404 by link layer 312 by drip timer broadcast idle time not ready, and be in not busy state by state message notice application layer 313 current link layer 312; If there have True Data to intercept message to be ready, then link layer intercepts message 403 by drip timer broadcast True Data, be in busy condition by state message notice application layer 311 current link layer 312, then destination address prepares next virtual carrier sensing in wireless network communication message 405 from increasing simultaneously.From node 102 power on enter transmitting-receiving process 414 after, receive intercept message 415.When receive host node 102 intercept message after, the destination address judging to intercept message whether with this node address matches 416, if do not mated, then continue reception and intercept message 415; If coupling, then judge whether this node has True Data to intercept message ready 417 further, message 418 is intercepted by drip timer broadcast True Data when having ready True Data to intercept message, judge whether when intercepting message without ready True Data that PTT takies request message ready 419, if there have PTT to take request message to be ready, take request message ready 420 by drip timer broadcast PTT, if no, then continue reception to intercept message 415.After host node 101 receives beginning 406, judge whether that receiving True Data intercepts message 408, does not receive, continue to judge; If received, judge whether PTT takies request message 409 to message, request message is taken if not PTT, then process simultaneous data and speech transmission bag and packet 407, if be that PTT takies request message, then send PTT when this node countless words simultaneous interpretation bag and take acknowledgement message 410, then application layer sends token release message to link layer 411, and switches to from node 412.Whole host node receives processing procedure and terminates 413.
The software simulating interface protocol of described algorithm is applicable to apply the message format that CPU software 304 and link CPU software 305, two softwares define according to table 1 and carries out information interaction.
Table 1 interface message formal definition
The implication of each element of message is as follows:
1) heading: 1 byte, is defaulted as 0x7E;
2) address is received and dispatched: totally 2 bytes.The 1st the byte representation source address closelyed follow after heading, the 2nd the byte representation destination address of closelying follow after heading.Wherein source address value: 0 ~ 255, destination address value: 0 ~ 255, wherein 0xFF represents broadcast address, and namely all stations all need to receive these data and to go forward side by side row relax.Destination address is also known as repeating query address, recipient is mated according to this address value, when this address and own node matching addresses, link layer active reporting allows to send message to application layer, thus makes application layer have an opportunity to send this node data to be sent, speech and signaling.Source address is the own node address that transmit leg is filled, and in network, host node address is defaulted as 0;
3) type: 1 byte, high 4 messages, low 4 for distinguishing the message of different kinds, type definition is in table 2;
Table 2 type definition
4) length: text size, maximum length can not more than 120 bytes, as exceeded then this data packet discarding.
5) text: text is used for representing the True Data needing transmission, comprises signaling, speech and data.
6) School Affairs: the cumulative sum of all fields from 0x7E to text, gets low eight place values.
embodiment 1:for realizing simultaneous data and speech transmission function, half-duplex channel uses the step of virtual carrier sensing in wireless network communication network-building method as follows:
Step 1: select 12 network nodes, be connected in series by power line.Network node applies CPU 301 is the ARM CPU S3C2440 of Samsung, runs (SuSE) Linux OS.Link CPU302 is MAXQ microcontroller, runs Single Chip Microcomputer (SCM) program.Communication interface is serial ports:
Step 2: write application CPU software 304 and link CPU software 305 according to algorithm flow chart and interface protocol at application CPU 301 and link CPU 302.The interacting message (as shown in Figure 5) of node power up key, comprise: (1) application layer initialize communication interface parameter 501 and chain path level initialization communication interface parameter also start drip timer 507, precision of timer is 10ms, lower 1 of CENELEC A pattern is grouped into 139 bytes, the theoretical transmitted in packets time is 34.75ms, timer period is the integral multiple of precision of timer, is initialized to 80ms; (2) application layer is sent by serial ports and arranges node address message 502, and link layer preserves node address 508 after receiving this message; (3) application layer is sent by serial ports and takies token message 503, and link layer arranges this node after receiving this message be host node 509, and link layer enters host node and intercepts message ready for sending state.When application layer intercepts message transmission without True Data, drip timer sends idle listening dispatching message from node 511 by the minimum period; And send state message 510 to application CPU software; (4) application layer switches to host node 504 after receiving state message, enters True Data and intercepts message transmission state 506 and accepting state 505.
Step 3: working procedure, drip policy selection is transmitted as required.Each node generates G.729 digital voice (10 byte) by 10ms, is seized the transmission route of speech stream by PTT.Speech stream is made up of the 60 byte voice packets that 60ms is corresponding, once certain node presses PTT, the drip timer period of this node becomes 60ms, and gives other nodes by this cycle synchronisation.The simultaneous data and speech transmission now transmitted comprises the voice data of 60 bytes and the clear data of 60 bytes.When speech is sent, the drip timer synchronization of all nodes is to 80ms.
Strict by step 1, after 2,3 execution, just on half-duplex channel, by virtual carrier sensing method networking, simultaneous data and speech transmission can be completed.
embodiment 2:in step 1, more node can be selected to expand network capacity to 24 nodes.Application CPU 301 can with the CPU adopting intel series, and operating system uses Windows XP.Inter-board interface can adopt network interface.
In step 2, the transmission rate that can change raising circuit, to 100kbps, makes CENELEC C into by mode of operation; Drip timer period is set to 20ms.After improving line speed and network capacity, utilize virtual carrier sensing method networking, the simultaneous data and speech transmission function of witched-capacity network can be completed on half-duplex channel.
Other is as embodiment 1.
Claims (10)
1. based on the application layer group-net communication method of half-duplex channel, it is characterized in that, comprise virtual carrier sensing in wireless network communication organization algorithm and virtual carrier sensing in wireless network communication Networking protocol;
Described virtual carrier sensing in wireless network communication organization algorithm, its step is as follows:
1) share the network node of half-duplex channel and be divided into host node in logic and from node, the active that host node is responsible for virtual carrier sensing in wireless network communication message sends, from node passive listening; In any moment in network, only allow existence host node, host node is by Networking protocol dynamic-configuration;
2) host node adopts drip timer period to send virtual carrier sensing in wireless network communication message to from node, destination address in message goes round and begins again from 1 to N, from the destination address of virtual carrier sensing in wireless network communication message that node will receive, mate with the networking node address of self, if coupling, then start to send self ready True Data;
3) when being ready for sending simultaneous data and speech transmission bag from node or without ready application data, described simultaneous data and speech transmission bag is equal to pure voice packets, must send PTT in advance take request message and wait for that PTT takies acknowledgement message from node; After from node listens to acknowledgement message, switch to host node by from node, simultaneously original host node receives PTT and takies request message and send after PTT takies acknowledgement message, switches to from node by oneself by host node;
Described virtual carrier sensing in wireless network communication Networking protocol, its step is as follows:
1) inter-board interface that protocol massages transmission adopts is determined;
2) protocol massages form is defined, and the component of interface message between given application layer and link layer;
3) definitions section network control protocol message types;
4) realize drip timer, comprising: determine the transmitted in packets time; According to timing cycle configuration timing accuracy; Drip policy selection.
2. the application layer group-net communication method based on half-duplex channel according to claim 1, is characterized in that, described virtual carrier sensing in wireless network communication message is divided into True Data to intercept message and idle listening message; True Data intercepts message carrier signaling bag, simultaneous data and speech transmission bag and packet; Idle listening message carrying idle packet.
3. the application layer group-net communication method based on half-duplex channel according to claim 1, it is characterized in that, described inter-board interface can adopt network interface or serial ports.
4. the application layer group-net communication method based on half-duplex channel according to claim 1, is characterized in that, described interface message is made up of heading, transmitting-receiving address, type, length, text and verification key element.
5. the application layer group-net communication method based on half-duplex channel according to claim 1, it is characterized in that, described type of message takies 1 byte, and high 4 reservations of byte, are resolved by link layer for low 4, has worked in coordination with networking and has controlled.
6. the application layer group-net communication method based on half-duplex channel according to claim 1, it is characterized in that, the described transmitted in packets time affects by line theory transmission rate, application layer and link layer interface speed and link layer bag processing time.
7. the application layer group-net communication method based on half-duplex channel according to claim 1, is characterized in that, described timing cycle configuration timing accuracy is less than the transmitted in packets time.
8. the application layer group-net communication method based on half-duplex channel according to claim 1, is characterized in that, the drip strategy that described drip strategy adopts accelerating network convergence or the drip strategy transmitted as required.
9. the application layer group-net communication method based on half-duplex channel according to claim 9, is characterized in that, the drip strategy of described accelerating network convergence, and namely when network topology quite stable, the timing cycle sending idle packet is elongated; When network topology change needs synchronization parameter, the timing cycle sending idle packet shortens, but is greater than the transmitted in packets time.
10. the application layer group-net communication method based on half-duplex channel according to claim 9, is characterized in that, the described drip strategy transmitted as required, and namely any instant needs transporting speech bag, and timing cycle shortens and reduces speech time delay, but is greater than the transmitted in packets time; Any instant need transmit packet, the elongated raising efficiency of transmission of timing cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410630168.0A CN104320411A (en) | 2014-11-11 | 2014-11-11 | Virtual carrier sense networking communication method based on half-duplex channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410630168.0A CN104320411A (en) | 2014-11-11 | 2014-11-11 | Virtual carrier sense networking communication method based on half-duplex channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104320411A true CN104320411A (en) | 2015-01-28 |
Family
ID=52375581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410630168.0A Pending CN104320411A (en) | 2014-11-11 | 2014-11-11 | Virtual carrier sense networking communication method based on half-duplex channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104320411A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109922537A (en) * | 2019-03-29 | 2019-06-21 | 广州邦讯信息系统有限公司 | Data link layer and its implementation applied to wireless communication |
| WO2023015777A1 (en) * | 2021-08-11 | 2023-02-16 | 杭州联芯通半导体有限公司 | Method for reducing traffic of g3-plc bootstrap procedure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938518A (en) * | 2010-09-03 | 2011-01-05 | 上海大学 | Data link layer protocol of low voltage power line spread-frequency communication |
| CN101969517A (en) * | 2010-08-26 | 2011-02-09 | 江西联创通信有限公司 | High-speed collinear communication module and method |
| CN202872916U (en) * | 2012-11-14 | 2013-04-10 | 江西联创通信有限公司 | Colinear remote data-voice co-transmission equipment |
| CN103262434A (en) * | 2010-12-13 | 2013-08-21 | 德克萨斯仪器股份有限公司 | Media access control layer for power line communications |
| CN103312563A (en) * | 2013-06-24 | 2013-09-18 | 深圳市金正方科技股份有限公司 | Automatic information collection method and system based on power line carrier communication |
| CN103428089A (en) * | 2012-05-16 | 2013-12-04 | 深圳市金正方科技有限公司 | Method and system for optimizing low-voltage power line carrier communication network |
-
2014
- 2014-11-11 CN CN201410630168.0A patent/CN104320411A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969517A (en) * | 2010-08-26 | 2011-02-09 | 江西联创通信有限公司 | High-speed collinear communication module and method |
| CN101938518A (en) * | 2010-09-03 | 2011-01-05 | 上海大学 | Data link layer protocol of low voltage power line spread-frequency communication |
| CN103262434A (en) * | 2010-12-13 | 2013-08-21 | 德克萨斯仪器股份有限公司 | Media access control layer for power line communications |
| CN103428089A (en) * | 2012-05-16 | 2013-12-04 | 深圳市金正方科技有限公司 | Method and system for optimizing low-voltage power line carrier communication network |
| CN202872916U (en) * | 2012-11-14 | 2013-04-10 | 江西联创通信有限公司 | Colinear remote data-voice co-transmission equipment |
| CN103312563A (en) * | 2013-06-24 | 2013-09-18 | 深圳市金正方科技股份有限公司 | Automatic information collection method and system based on power line carrier communication |
Non-Patent Citations (2)
| Title |
|---|
| 禹德贵: "无线传感器网络节点设计及MAC协议研究与实现", 《北京邮电大学硕士毕业论文》 * |
| 聂世群等: "IEEE802.11MAC层CSMA/CA机制的分析与研究", 《内江科技》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109922537A (en) * | 2019-03-29 | 2019-06-21 | 广州邦讯信息系统有限公司 | Data link layer and its implementation applied to wireless communication |
| CN109922537B (en) * | 2019-03-29 | 2024-03-15 | 广州邦讯信息系统有限公司 | Wireless module and implementation method thereof |
| WO2023015777A1 (en) * | 2021-08-11 | 2023-02-16 | 杭州联芯通半导体有限公司 | Method for reducing traffic of g3-plc bootstrap procedure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102098113B (en) | Method for realizing water sound sensor network MAC (Media Access Control) protocol based on ALOHA and TDMA (Time Division Multiple Access) | |
| KR20050051709A (en) | Collaboration between wireless lan access points using wired lan infrastructure | |
| CN101719873A (en) | Kilomega virtual network card | |
| JP2002261786A (en) | Multi-access communication system and data transmitting and receiving device | |
| CN107872308A (en) | Data transmission method for uplink, method of reseptance and equipment | |
| CN112751703B (en) | Communication network establishing method and device, electronic equipment and storage medium | |
| CN102647805A (en) | Wireless sensor network transmission method based on medium access control (MAC) protocol | |
| CN108270652A (en) | A kind of high speed real-time bus system and its data processing method | |
| CN112040463A (en) | Wireless communication network networking method and system based on LoRa equipment | |
| CN103716092A (en) | Networking system and communication method for bidirectional optical fiber communication in bus network | |
| CN109922537B (en) | Wireless module and implementation method thereof | |
| JP6432294B2 (en) | COMMUNICATION SYSTEM, COMMUNICATION SYSTEM CONTROL METHOD, AND PROGRAM | |
| CN104320411A (en) | Virtual carrier sense networking communication method based on half-duplex channel | |
| CN111787431B (en) | Centralized meter reading system of dual-mode networking communication technology and implementation method thereof | |
| CN102821420A (en) | Data acquisition method based on double path transmission | |
| WO2018196833A1 (en) | Message sending method and message receiving method and apparatus | |
| CN114422614B (en) | Method, device, equipment and storage medium for controlling multilink equipment to transmit data | |
| CN110855540B (en) | 485 multi-master communication method and system based on single-ring network | |
| US9992767B2 (en) | Data transmission method and device | |
| CN114465981B (en) | Data transmission method and communication device | |
| CN114039810B (en) | Flexible automatic control system based on Ethernet | |
| CN102420734A (en) | System for realizing topological structure of controller area network (CAN) bus | |
| CN101854207A (en) | Method for beacon frame relay in high-speed wireless personal network | |
| CN102081383B (en) | Device and method for secure network protocol for field control | |
| CN109802877A (en) | A kind of CAN bus based Communication System Design |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |