CN105072659B - A kind of high transmission rates multi-hop wireless sensor network - Google Patents
A kind of high transmission rates multi-hop wireless sensor network Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The present invention provides a kind of high transmission rates multi-hop wireless sensor network, the networking by a radio network gateway with the N number of independent radio frequency module communicated on N channel, N number of routing node with dijection frequency module, different channels N number of cluster on leaf node form.Since N number of routing node has the first radio-frequency module and the second radio-frequency module of corresponding different channels, each routing node can be carried out at the same time sending and receiving for data packet, so as to greatly improve the efficiency of transmission of data.Leaf node on N number of cluster of different channels transmits data to N number of routing node in respective channels, data are transmitted step by step by this N number of routing node and are sent to M grades of routing nodes, the radio network gateway of N number of channel is then forwarded the data to by M grades of routing nodes.It is truly realized remote, high transmission rates data transfer modes.
Description
Technical field
The present invention relates to a kind of wireless sensor technology fields, and in particular to a kind of high transmission rates multi-hop wireless sensor net
Network.
Background technology
Wireless sensing network system has is widely applied field very much, such as monitoring structural health conditions, video monitoring, vehicle prison
Control, production environment and device status monitoring, measuring of human health etc..Wherein, many application fields have wireless sensor network
Standby Long-range Data Transmission efficiency proposes requirements at the higher level, needs wireless sensor network system in the case where multi-hop transmits at a distance
There can be higher data transmission rate.
If multi-medium data transmits, the wireless sensor networks such as monitoring structural health conditions are all towards high transmission rates, big data quantity
Wireless sensor network system application field.By taking the monitoring structural health conditions of U.S.'s Gold Gate Bridge as an example, arranged on bridge
64 acceleration transducers.After the sampling of a cycle, system will produce the data of 20MB, and data volume is very big.In more matchmakers
In volume data transmission, in order to keep the fluency of data, with greater need for high data transmission rate.But it is based on IEEE802.15.4 agreements
Transmission rate maximum can be only achieved 250kbps, when the data volume of ad-hoc network becomes larger, which can no longer meet
It is required that.Therefore multi channel networks are needed to improve network bandwidth, increase multiple channels to improve the transmission rate of network.But multichannel
Agreement cannot solve the limitation that node injection frequency module structure is brought, and commonly use radio node such as Micaz, Telosb and Imote etc.,
Be single control chip injection frequency module structure, cannot handle data in multiple channels simultaneously, real-time is insufficient, data capacity by
It is limited to 250kbps as defined in IEEE 802.15.4 agreements, the data of multiple transmissions are still needed to by base station by switching letter successively
Road is received；Most of multi-channel protocols need node to send beacon frame control channel with upper frequency, occupy data frame
Sending time slots increase the burden of data capacity.Therefore the data transmission rate of injection frequency module multi channel networks nevertheless suffers from
The serious restriction of injection frequency module.
When network transmission scope is larger, how in the case where not influencing network high transmission rates, the data of network are realized
The distance of transmission extends and a problem to be solved.Currently, to realize that multi-hop continuously transmits at a distance, both at home and abroad
Many scientific research institutions are extended by disposing the data transmission that there is the routing node of complicated Routing Protocol to carry out network.These routings
Although node can extend transmission range, the introducing of routing node but greatly reduces the transmission rate and network throughput of network
Amount.First, the complicated Routing Software consultation on routing node greatly occupies node resource and operational efficiency；Secondly, routing
Node is typically all injection frequency module node, can not be realized in synchronization and send and receive data parallel, so as to cause data
Transfer cannot be carried out in real time.
Invention content
It is passed in long range for this purpose, technical problem to be solved by the present invention lies in wireless sensor networks in the prior art
Defeated rate is low, in multinode, network transmission bandwidth utilization rate is low.
In order to solve the above technical problems, the present invention provides a kind of high transmission rates multi-hop wireless sensor network, including N items letter
Road, N foliages child node, N groups routing node and a radio network gateway；Each group of routing node includes M grades of routing nodes, N and M
It is the natural number more than 1；Wherein：
Data packet is dealt into corresponding receive on channel by the leaf node inside the same channel on respective transmission channel
First order routing node, first order routing node delivers a packet to M grades of routing nodes step by step, last M grades of routings
Node sends the data to radio network gateway；Control command is sent to M grades of routing nodes, M grades of routing nodes by radio network gateway
Control command is sent on the routing node of the first order step by step, then control command is broadcast to correspondence by first order routing node
All leaf nodes of channel, each leaf node execute corresponding actions according to control instruction.
Preferably, in the high transmission rates multi-hop wireless sensor network, each routing node utilizes transmission data packet
Aperture time receive respective channel on control instruction, using received data packet aperture time by control instruction be sent to
It corresponds to the upper level routing node of same channel.
Preferably, in the high transmission rates multi-hop wireless sensor network, each routing node includes corresponding different letters
First radio-frequency module and the second radio-frequency module in road；
First radio-frequency module is used to receive the data packet in respective channel, and will be controlled using the aperture time of received data packet
System instruction is forwarded to the upper level routing node or leaf node of corresponding same channel；
Second radio-frequency module is used to receive the control instruction in respective channel, and utilizes the aperture time for receiving control instruction
Forward the packet to the next stage routing node or radio network gateway of corresponding same channel.
Preferably, in the high transmission rates multi-hop wireless sensor network, radio network gateway includes N number of independent radio frequency module
With a control radio-frequency module；
Each independent radio frequency module, the data packet for receiving the transmission of the grade routing nodes of the M in respective channel；
Radio-frequency module is controlled, for periodically sending out for ensureing that the control of the time synchronization of all leaf nodes refers to
It enables.
Preferably, in the high transmission rates multi-hop wireless sensor network, radio network gateway, each routing node and every
One leaf node is operated in similar frequency bands.
Preferably, in the high transmission rates multi-hop wireless sensor network, similar frequency bands be 2.42-2.4835GHZ or
Person's frequency range 233MHZ-928MHZ or frequency range 5.725-5.850GH.
Preferably, in the high transmission rates multi-hop wireless sensor network, under frequency range 2.42-2.4835GHZ, leaf section
Point first order routing node between, between adjacent two-stage routing node, the M grades of maximums between routing node and radio network gateway
Transmission range is 100 meters；
Under frequency range 2.42-2.4835GHZ and frequency range 233MHZ-928MHZ, between leaf node and first order routing node,
Between adjacent two-stage routing node, the M grades of maximum transmission distances between routing node and radio network gateway be 7000 meters.
Preferably, in the high transmission rates multi-hop wireless sensor network, each leaf node is sent out using CSMA mechanism
State or TDMA mechanism is sent to send state；
When sending state transmission data packet using CSMA mechanism, as long as leaf node detects that the respective channel free time sends
Data packet；
When sending state using TDMA mechanism, leaf node is according to preset sequential transmission data packet.
Preferably, in the high transmission rates multi-hop wireless sensor network, radio network gateway is additionally operable to pass through detection data
The frame format and packet length filter false data packet or mess code data packet of packet.
Preferably, in the high transmission rates multi-hop wireless sensor network, radio network gateway is additionally operable in the number received
Increase cyclic redundancy check according to packet tail portion.
The above technical solution of the present invention has the following advantages over the prior art：
High transmission rates multi-hop wireless sensor network of the present invention includes N number of only with what is communicated on N channel
Fire the leaf node on N number of cluster of the radio network gateway of frequency module, N number of routing node with dijection frequency module, different channels from a standing position
At.Since routing node has the first radio-frequency module and the second radio-frequency module of corresponding different channels, can utilize simultaneously
Two radio-frequency modules carry out sending and receiving for data packet respectively.First radio-frequency module can utilize and receive upper level routing node
The aperture time of data sends control instruction, and the second radio-frequency module can utilize the gap to next stage routing node transmission data
Time receives control instruction, so as to greatly improve the efficiency of transmission of data.First radio-frequency module and the second radio-frequency module
The data packet from upper level routing node and the control command from next stage routing node can be received simultaneously.
In the present invention, the leaf node on N number of cluster of different channels is according to TDMA (Time Division Multiple
Access) agreement or CSMA (Carrier Sense Multiple Access) agreement transmit data in respective channels
N number of first order routing node, data are passed to M grades of routing nodes step by step by this N number of first order routing node, then by
M grades of routing nodes forward the data to the radio network gateway of N number of channel.Using the above scheme, exist if it is 2.4GHZ networks
In the case that one jumps as 40-70m, each channel maximum transfer rate can reach 1Mbps or so in N number of channel, and whole network is maximum
Transmission rate can arrive N*1Mbps or so.It can then be realized with lower network in the case where a jump is 3km-7km if it is 1GHZ, it is N number of
Each channel maximum transfer rate can reach 1Mkbps or so in channel, and whole network maximum transfer rate can arrive N*1Mbps or so.It is real
Remote, high transmission rates data transfer modes are showed.
Description of the drawings
In order to make the content of the present invention more clearly understood, it below according to specific embodiments of the present invention and combines
Attached drawing, the present invention is described in further detail, wherein
Fig. 1 is the networking schematic diagram of wireless sensor network described in one embodiment of the invention；
Fig. 2 is radio network gateway hardware core configuration diagram described in one embodiment of the invention；
Fig. 3 is radio network gateway high speed received data packet FIFO configuration diagrams described in one embodiment of the invention；
Fig. 4 is radio network gateway express statistic effective data packets schematic diagram described in one embodiment of the invention；
Fig. 5 is the format of giving out a contract for a project of the leaf node based on 2.4G frequency ranges described in one embodiment of the invention；
Fig. 6 is the radio network gateway data packet receiving packet checking process figure based on 2.4G frequency ranges described in one embodiment of the invention；
Fig. 7 is the following leaf node maximum load effective data packets format of 1GHZ frequency ranges described in one embodiment of the invention
Figure；
Fig. 8 is the following radio network gateway data packet receiving packet checking process figure of 1GHZ frequency ranges described in one embodiment of the invention；
Fig. 9 is routing node nucleus module schematic diagram described in one embodiment of the invention；
Figure 10 is routing node configuration diagram described in one embodiment of the invention；
Figure 11 is the flow chart of giving out a contract for a project under the limiting case of leaf node described in one embodiment of the invention；
Figure 12 is the flow chart of giving out a contract for a project under the TDMA mechanism of leaf node described in one embodiment of the invention；
Figure 13 is the packet loss statistical chart under all channels described in one embodiment of the invention.
Specific implementation mode
The present embodiment provides a kind of high transmission rates multi-hop wireless sensor networks, as shown in Figure 1, including N channel, N clusters
Leaf node, N groups routing node and a radio network gateway；Each group of routing node includes M grades of routing nodes, and N and M are big
In 1 natural number；Wherein：Data packet is dealt into correspondence on respective transmission channel and connect by the leaf node inside the same channel
First order routing node on collection of letters road, first order routing node deliver a packet to M grades of routing nodes step by step, and last
M grades of routing nodes send the data to radio network gateway；Control command is sent to M grades of routing nodes, M grades of roads by radio network gateway
Control command is sent on the routing node of the first order step by step by node, then first order routing node broadcasts control command
To all leaf nodes of respective channels, each leaf node executes corresponding actions according to control instruction.
Specifically, each routing node includes the first radio-frequency module and the second radio-frequency module of corresponding different channels, the
One radio-frequency module is used to receive the data packet in respective channel, and the second radio-frequency module is for sending data packets to corresponding phase
The next stage routing node of cochannel.Wherein, first order routing node receives the data that the leaf node in respective channel is sent
Packet, M grades of routing nodes send data packets to radio network gateway.Radio network gateway, including N number of independent radio frequency module and a control
Radio-frequency module, each independent radio frequency module receive the data packet that the M grade routing nodes in respective channel are sent；Control radio frequency mould
Block periodically sends out the M grades routing in the control instruction to respective channels of the time synchronization for ensureing all leaf nodes
Node；Control instruction is sent to the upper level routing node in respective channels by M grades of routing nodes, and the second of each routing node
Radio-frequency module is used to receive the control instruction in respective channel, and the first radio-frequency module is corresponding for control instruction to be sent to
The upper level routing node of same channel, until first order routing node receives control instruction；First order routing node will be controlled
System instruction is sent to all leaf nodes in corresponding cluster, and each leaf node executes corresponding actions according to control instruction.Wherein
Control instruction include carry out configuration node initialization, parameter configuration, time synchronization adjust, crystal oscillator drift error eliminate etc..
In said program, in each routing node, the first radio-frequency module can utilize and receive upper level routing node data
Aperture time send control instruction, the second radio-frequency module can utilize the aperture time to next stage routing node transmission data
Control instruction is received, data transmission efficiency is substantially increased.Wherein first order routing node by the first radio-frequency module receive come
From the data packet of all leaf nodes belonged in the channel, next stage is then delivered a packet to by the second radio-frequency module
Routing node.Data packet is last transmitted to radio network gateway by M grades of routing nodes by the second radio-frequency module.Other routing nodes
The data packet of upper level routing node is received by the first radio-frequency module, and is delivered a packet to down by the second radio-frequency module
First radio-frequency module of level-one routing node.It is sent in transmission process in above-mentioned data packet, each routing node is to data
Packet is without any verification, also without the statistics of packet length.
In the present embodiment, as shown in Fig. 2, radio network gateway communicates on N channel, radio network gateway includes a radio frequency subsystem
System, Radio Frequency Subsystem includes N number of independent radio frequency module, further includes one for receiving the data on M grades of routing nodes
A control radio-frequency module is for sending control command to M grades of routing nodes.
Radio network gateway high speed received data packet FIFO (First Input First Output) framework is as shown in Figure 3.It is soft
Part structure includes that N number of independent radio frequency module, Radio Frequency Management layer include Radio Frequency Management shape by radio frequency reception layer from bottom to up
State machine, data processing cache layer include data processing state machine, FIFO management control layers and usb data communication layer.Radio Frequency Management
State machine major function includes：(1) power-up initializing independent radio frequency module；(2) after response independent radio frequency module receives data
The interrupt signal sent out, read data packet；(3) independent radio frequency module is resetted when abnormal state.Data processing state machine it is main
Function includes：(1) data packet read is handled according to HDLC protocol；(2) increase cyclic redundancy check in data packet tail portion, for supervising
The data transmission correctness at control center verifies；(3) data packet handled is stored in corresponding FIFO in data storage cell；
The read-write of FIFO is enabled by FIFO management control layer controls.When FIFO management control layers read data from FIFO, close
Writing for FIFO is enabled, until the data in FIFO are completely removed.It includes FIFO scannings state machine, FIFO that FIFO, which manages control layer,
Management state machine and Streams Module.Constantly the sky of FIFO expires situation to FIFO scannings state machine in all channels of scanning successively,
FIFO management state machines are according to scanning as a result, controlling FIFO.
Fifo module in radio network gateway by fpga chip verifies frame format and packet grow timely filter false data packet with
Mess code data packet ensures to receive effective data packets.Radio network gateway express statistic data packet is as shown in Figure 4.First, at the beginning of radio network gateway
Then all internal state machines of beginningization and radio-frequency module start the equal pending datas arrival triggering parallel of all radio-frequency modules, when any
One independent radio frequency module detects that the FIFOP pins in the independent radio frequency module are height, then it represents that once data packet arrives.
Radio network gateway verifies the size and frame format of the data packet, and packet statistics are added one if packet verification is correct,
And statistics number is uploaded to host computer；Conversely, then abandoning the data packet also without statistics.Whole flow process ensures radio network gateway
The data packet of upload is all correct, and to reduce, host computer verification is wrong to wrap the delayed time.
In above-described embodiment, each radio network gateway, each routing node and each leaf node are operated in same frequency
Section, i.e. frequency range 2.42-2.4835GHZ either frequency range 233MHZ-928MHZ or frequency range 5.725-5.850GH.If network work
Make under 2.4GHZ frequency ranges, then leaf node efficient loading maximum packet length is generally 125 bytes, as shown in Figure 5.Radio network gateway
Receive that carry out packet checking process figure under this frequency range after the data packet of leaf node as shown in Figure 6.Radio network gateway receives a number
After packet, carries out verification frame 1 and verify the verification of frame 2, then carry out the verification of data packet length again, any of the above once verifies
Mistake all abandons the reception of the packet and is received next time.Start to recycle reception as unit of byte if these verifications are correct
Data packet simultaneously starts counting up, and the verification of verification frame 3 is carried out when count value increases to 125 byte.Continue if verification is correct
Check code is received, otherwise abandons the packet.Wherein, frame 1, verification frame 2, verification frame 3 are verified as User Defined frame, and in Fig. 5
Data packet format is consistent.If network is operated in 1GHZ frequency ranges hereinafter, so leaf node efficient loading maximum packet length is generally
64 bytes, as shown in Figure 7.Radio network gateway, which receives, carries out packet checking process figure as schemed after the data packet of leaf node under this frequency range
Shown in 8.After radio network gateway receives a data packet, the verification of TX and packet length are carried out, check errors of any of the above are all lost
It abandons the reception of the packet and is received next time.Start to recycle received data packet simultaneously as unit of byte if these verifications are correct
It starts counting up, the verification of verification frame 3 is carried out when count value increases to 64 byte.It continues to verify if verification is correct
Code, anyway abandon the packet.Wherein, verification frame 3 is User Defined frame.
Routing node nucleus module schematic diagram is as shown in Figure 9.The different radio-frequency module of channel there are two on routing node, this
Two modules are respectively the first radio-frequency module and the second radio-frequency module.Dijection frequency module routing node software architecture such as Figure 10 institutes
Show.It includes the first radio-frequency module and the second radio-frequency module, Radio Frequency Management layer that software configuration passes through radio frequency reception layer to be from bottom to up
Include including Radio Frequency Management state machine, data analysis layer
Control command report processing state machine and sensing data packet processing state machine, FIFO manage control layer.Radio Frequency Management shape
State machine major function includes：(1) power-up initializing radio-frequency module；(2) response radio-frequency module receives sensing data or same step number
According to the interrupt signal that packet is sent out, sensing data packet or synchronization packets are read；The major function of data processing state machine includes：
(1) sensing data or synchronization packets are written to FIFO from radio-frequency module；(2) from FIFO take out sensing data or
Synchronization packets are written to radio-frequency module.Other than the first order and M grades of routing nodes, the reception channel of other routing nodes with
The transmission channel value of a upper routing node is identical, it is identical as the reception channel value of next routing node to send channel.First
Grade routing node is received by the first radio-frequency module from the data for belonging to all leaf nodes in its reception channel, and is passed through
Second radio-frequency module transmits data on the first radio-frequency module of next stage routing node.Hereafter, and so on, upper level
Routing node is transmitted data to by the second radio-frequency module on the first radio-frequency module of next stage dijection frequency module routing node,
Until M grades of routing nodes.Data are sent to by the second radio-frequency module with logical on N kind channels by M grades of routing nodes
The radio network gateway of N number of independent radio frequency module of letter.Between leaf node and first order routing node, per level-one (the non-first order and
M grades) between routing node, the M grades of maximum transmission distances between routing node and radio network gateway are in frequency range 2.42-
Respectively 100 meters and 7000 meters when 2.4835GHZ and frequency range 233MHZ-928MHZ.The transmission channel of each routing node with connect
It is different to receive channel value, to ensure that each routing node can be carried out at the same time sending and receiving for data.
In the present embodiment, it is maximum transmission rate state or TDMA machines that each leaf node sends state using CSMA mechanism
Transmission state processed.When leaf node needs to improve the length and unit effectively wrapped in data packet as possible under maximum transmission rate state
The number of giving out a contract for a project of interior leaf node, therefore any operating system, Routing Protocol MAC (Multiple Access are not used
Control) layer protocol and Routing Protocol, as long as but directly detecting CCA (Clear by the way of hardware trigger
Channel Assessment) idle just rule is detected according to CSMA and remove transmission data packet, leaf node limit transmission data packet
Flow is as shown in figure 11.After the completion of leaf node node initializing, leaf node head and the tail verification frame, fully loaded data packet and
When packet length is written to the TXFIFO of radio-frequency module, leaf node begins to detecting CCA idle states, if CCA is in idle shape
When state, leaf node sends head and the tail verification frame, fully loaded data packet.Another is the data that node is in TDMA mechanism
Transmission state, each leaf node, which verifies head and the tail frame, fully loaded data packet and wraps length, in this state is written to radio frequency mould
When the TXFIFO of block, leaf node begins to whether detecting reaches time slot and give out a contract for a project the time, if reaching the time of giving out a contract for a project, leaf node
Head and the tail verification frame, fully loaded data packet are sent, as shown in figure 12.
It using the said program in the present embodiment, is tested, is passed through for the wireless sensor network by taking 8 channels as an example
It spends 24 hours and tests, as shown in figure 13, the packet loss for each channel that last test obtains on radio network gateway is in one thousandth
Hereinafter, having very high accuracy rate.
Using the said program in the present embodiment, it can then realize that it is the more of 40-70m to be jumped one if it is 2.4GHZ networks
In the case of jump, maximum transfer rate can reach 1Mbps or so under each channel in N channels, and whole network maximum transfer rate can arrive N*
1Mbps or so.It can then be realized with lower network if it is 1GHZ and be jumped as under the multiple jump condition of 3km-7km one, it is each in N channels
Maximum transfer rate can reach 1Mkbps or so under channel, and whole network maximum transfer rate can arrive N*1Mbps or so.Realize long distance
Data transfer mode from, high transmission rates.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations can be made in the case of bright spirit and scope, and such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (7)
1. a kind of high transmission rates multi-hop wireless sensor network, which is characterized in that including N channel, N foliages child node, N groups road
By node and a radio network gateway；Each group of routing node includes M grades of routing nodes, and N and M are the natural number more than 1；Its
In：
Data packet is dealt on respective transmission channel corresponding the received on channel by leaf node inside the same channel
Level-one routing node, first order routing node deliver a packet to M grades of routing nodes, last M grades of routing nodes step by step
Send the data to radio network gateway；Control command is sent to M grades of routing nodes by radio network gateway, and M grades of routing nodes will be controlled
System order is sent on the routing node of the first order step by step, and then control command is broadcast to respective channels by first order routing node
All leaf nodes, each leaf node according to control instruction execute corresponding actions；
Each routing node receives the control instruction in respective channel using the aperture time of transmission data packet, utilizes reception data
Control instruction is sent to the upper level routing node of corresponding same channel by the aperture time of packet；Each routing node includes
The first radio-frequency module and the second radio-frequency module of corresponding different channels；First radio-frequency module is used to receive the data in respective channel
It wraps, and control instruction is forwarded to the upper level routing node of corresponding same channel using the aperture time of received data packet
Or leaf node；Second radio-frequency module is used to receive the control instruction in respective channel, and utilizes the sky for receiving control instruction
The gap time forwards the packet to the next stage routing node or radio network gateway of corresponding same channel；
Radio network gateway includes N number of independent radio frequency module and a control radio-frequency module；Each independent radio frequency module, for receiving phase
The data packet for answering the M grade routing nodes on channel to send；Radio-frequency module is controlled, for periodically sending out for ensureing all leaves
The control instruction of the time synchronization of child node.
2. high transmission rates multi-hop wireless sensor network according to claim 1, it is characterised in that：
Radio network gateway, each routing node and each leaf node are operated in similar frequency bands.
3. high transmission rates multi-hop wireless sensor network according to claim 2, it is characterised in that：
Similar frequency bands are 2.42-2.4835GHZ either frequency range 233MHZ-928MHZ or frequency range 5.725-5.850GH.
4. high transmission rates multi-hop wireless sensor network according to claim 3, it is characterised in that：
Under frequency range 2.42-2.4835GHZ, between leaf node and first order routing node, between adjacent two-stage routing node,
The M grades of maximum transmission distances between routing node and radio network gateway are 100 meters；
Under frequency range 233MHZ-928MHZ, between leaf node and first order routing node, between adjacent two-stage routing node, M
Maximum transmission distance between grade routing node and radio network gateway is 7000 meters.
5. according to claim 1-4 any one of them high transmission rates multi-hop wireless sensor networks, it is characterised in that：
Each leaf node sends state using CSMA mechanism or TDMA mechanism sends state；
When sending state transmission data packet using CSMA mechanism, as long as leaf node detects respective channel free time i.e. transmission data
Packet；
When sending state using TDMA mechanism, leaf node is according to preset sequential transmission data packet.
6. high transmission rates multi-hop wireless sensor network according to claim 5, it is characterised in that：
Radio network gateway is additionally operable to frame format and packet length filter false data packet or mess code data by detection data packet
Packet.
7. high transmission rates multi-hop wireless sensor network according to claim 6, it is characterised in that：
Radio network gateway is additionally operable to increase cyclic redundancy check in the data packet tail portion received.
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| CN106330257B (en) * | 2016-08-29 | 2019-02-01 | 武汉微创光电股份有限公司 | A kind of radio data transmission method and system |
| CN109547348B (en) * | 2017-09-21 | 2022-04-05 | 阿里巴巴集团控股有限公司 | Communication and route establishing method and device |
| CN109615884A (en) * | 2018-12-20 | 2019-04-12 | 南京丹腾智能科技有限公司 | Wireless traffic signal light management system |
| CN110149275A (en) * | 2019-05-21 | 2019-08-20 | 雅量商业智能技术(广州)有限公司 | A kind of system and method improving electronic tag data transmission speed |
| CN111432351B (en) * | 2020-03-27 | 2021-09-14 | 厦门纵行信息科技有限公司 | Method and system for networking tree-shaped multi-hop network |
| CN112764673B (en) * | 2020-12-28 | 2024-03-15 | 中国测绘科学研究院 | Hyperspectral linear array data storage rate optimization method, device and storage medium |
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