CN108712787A - The base stations Internet of Things LoRa of multipath concurrence downlink - Google Patents
The base stations Internet of Things LoRa of multipath concurrence downlink Download PDFInfo
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- CN108712787A CN108712787A CN201810460513.9A CN201810460513A CN108712787A CN 108712787 A CN108712787 A CN 108712787A CN 201810460513 A CN201810460513 A CN 201810460513A CN 108712787 A CN108712787 A CN 108712787A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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Abstract
The invention discloses a kind of base stations Internet of Things LoRa of multipath concurrence downlink, including LoRa wireless data transmission units, core cpu processing unit, MCU core processing units, Ethernet data transmission unit and GPS positioning unit；LoRa wireless data transmission units are equipped with multichannel up channel and multichannel down channel, LoRa wireless data transmission units are connect with core cpu processing unit, core cpu processing unit is connect with GPS positioning unit, core cpu processing unit is connect with MCU core processing units, MCU core processing units are connect with LoRa wireless data transmission units, the present invention not only realizes full-duplex communication, also achieve bi-directional symmetrical 8+8 channels, separately increase 2 road down channels, two-way peer-to-peer communications may be implemented, reduce packet loss, reliable communications, it reduces and retransmits, fall net in time to judge, it is finally reached the ability of wide area covering, realize City-level covering.
Description
Technical field
The present invention relates to a kind of radio communication base stations, and in particular to a kind of base stations Internet of Things LoRa of multipath concurrence downlink.
Background technology
In low-power consumption wide area network（LPWAN）In application field, LoRa is most popular one of technology.It is low along with Internet of Things
The demand of power consumption connection over long distances, LoRa is with its open and flexibility so that the embedded radio communications field has occurred thoroughly
Change.LoRa technological incorporation digital spread spectrum, Digital Signal Processing and forward error correction coding technology, it is real with lower power consumption
Now transmission at a distance, changes the balance between transmission power consumption and transmission range, with battery powered wireless communication scene
In, data transmission is made using LoRa, advantage is fairly obvious, it presents one to people can realize remote, long pond service life, big
The Totally Advanced Communications Technology of power system capacity, low hardware cost, and this is exactly that Internet of Things (IOT) is required.
At present, it is common to use the base stations LoRa (gateway or concentrator), the substantially half-duplex base station of 8+1 channels, from
It is seen on channel quantity, uplink is seriously asymmetric with downlink, is all half-duplex operation from operating mode, i.e., base station down is sent out
When sending data, the upstream data packet of terminal cannot be received, the time of 1 bag data of downlink is longer, and the possibility of packet loss is bigger, with
For SF12 sends the downstream packets of 64 bytes, sending time reaches 2.8 seconds, easily generates packet loss.Asymmetric channel, terminal
Transmission cannot get response, whether cannot transmit success by perception data packet in time, and entire communication link is open loop, and communication pole can not
It leans on.In Internet of Things, the terminal frequency of giving out a contract for a project is inherently low, if 1 data-bag lost, it is meant that and 1 day, or even the longer time
There is no data, if Network Abnormal or Server Restart, causes subsequent packet verification error, according to LoRaWAN specifications, Ke Nengban
A month, or even fall net without perception road for more time, cause the follow-up business based on the data that can not be unfolded, so whole system
It is insecure, incomplete.
Invention content
The technical problem to be solved by the present invention is to provide a kind of multipath concurrence downlink in view of the above shortcomings of the prior art
The base stations Internet of Things LoRa, the base stations Internet of Things LoRa of this multipath concurrence downlink not only realize full-duplex communication, also achieve
Bi-directional symmetrical 8+8 channels towards CLASS-A applications, but also on this basis, 2 road down channels are increased, there is broadcast
Ability, the downlink application scenarios for supporting CLASS-B, C, realize two-way peer-to-peer communications, reduce packet loss, and reliable communications are reduced and retransmitted,
Fall net in time to judge, be finally reached the ability of wide area covering, realizes City-level covering.
To realize the above-mentioned technical purpose, the technical solution that the present invention takes is：
A kind of base stations Internet of Things LoRa of multipath concurrence downlink, including the processing of LoRa wireless data transmission units, core cpu are single
Member, MCU core processing units, Ethernet data transmission unit and GPS positioning unit；
The LoRa wireless data transmission units are equipped with multichannel up channel and multichannel down channel, and the LoRa wireless datas pass
Defeated unit is connect with the core cpu processing unit by spi bus, and the core cpu processing unit is connected with ether netting index
According to transmission unit, the core cpu processing unit is connect with the GPS positioning unit, the core cpu processing unit with it is described
MCU core processing units connect, and the MCU core processing units are connect with the LoRa wireless data transmission units, the GPS
Positioning unit is connect with the MCU core processing units and the LoRa wireless data transmission units.
As further improved technical scheme of the present invention, the Ethernet data transmission unit includes that wireless ethernet connects
Mouth and wired ethernet interface.
As further improved technical scheme of the present invention, the LoRa wireless data transmission units include wireless frequency expansion core
Piece SX1301, wireless frequency expansion chip SX1255, wireless frequency expansion chip SX1278, power splitter, filter, amplifier, duplexer and
Radio-frequency antenna, the core cpu processing unit are connect with the wireless frequency expansion chip SX1301, the wireless frequency expansion chip
SX1301 is connect with multiple wireless frequency expansion chip SX1255, the MCU core processing units and multiple wireless frequency expansions
Chip SX1278 connections, multiple wireless frequency expansion chip SX1278 are connect with the power splitter, the power splitter and the filter
Wave device connects, and the filter is connect with the amplifier, and the amplifier and multiple wireless frequency expansion chip SX1255 are equal
It is connect with the duplexer, the duplexer is connected with the radio-frequency antenna；
The wireless frequency expansion chip SX1301 and wireless frequency expansion chip SX1255 is used to receive eventually by duplexer and radio-frequency antenna
The upstream data packet sent is held, concurrently send upstream data packet to core cpu processing unit, the core cpu processing unit is used for
Upstream data packet is uploaded into background server by wireless ethernet interface or wired ethernet interface, at the core cpu
Reason unit is used to receive the downlink data packet of background server transmission, and by downstream packet transmission to MCU core processing units,
MCU core processing units control multiple wireless spread spectrum chip SX1278, and pass sequentially through power splitter, filter, amplifier, duplex
Downlink data packet is sent to terminal by device and radio-frequency antenna.
As further improved technical scheme of the present invention, the wireless frequency expansion chip SX1255 is 2, the wireless expansion
Frequency chip SX1278 is 10.
As further improved technical scheme of the present invention, the LoRa wireless data transmission units are equipped with 8 road row letters
10 road down channels of Dao He.
As further improved technical scheme of the present invention, 1 road down going channel in the down channel of 10 road is downlink
Broadcast channel, the another 1 road down channel in the down channel of 10 road are used to send the downlink that background server is actively initiated and ask
Seek LoRa data packets.
As further improved technical scheme of the present invention, the wireless ethernet interface uses wireless network card, described to have
Line Ethernet interface uses wired network adapter.
Include GPS clock synchronization unit as further improved technical scheme of the present invention, in the GPS positioning unit,
The GPS clock synchronization unit respectively with core cpu processing unit, MCU core processing units and LoRa wireless data transmission lists
Member connection is to realize that the clock of core cpu processing unit, MCU core processing units and LoRa wireless data transmission units is same
Step.
As further improved technical scheme of the present invention, further includes Power Management Unit and reset administrative unit, it is described
Power Management Unit is connect with core cpu processing unit and MCU core processing units, and the reset administrative unit is and CPU
Core processing unit is connected with MCU core processing units.
As further improved technical scheme of the present invention, the reset administrative unit uses hardware watchdog.
Beneficial effects of the present invention are：
（1）The present invention up to 10 road down channels, while transmission data packet, downlink ability are 10 times of ordinary base station, really same
When meet the base stations LoRa of tri- application scenarios of CLASS-A, CLASS-B, CLASS-C.
（2）The present invention realizes bi-directional symmetrical 8+8 channels, i.e. 8 up channels and 8 down channels, there is specific downlink
Channel provides answer service as the response channel of upstream data packet；Present invention also adds 2 road down channels, 1 tunnel has
Broadcast-capable provides accurate temporal information, provides the information such as currently available channel；It supports under CLASS-B, CLASS-C on 1 tunnel
Row application scenarios meet background server for the LoRa packet downbound requests actively initiated.
（3）The present invention is cooperated using the dual processor of core cpu processing unit and MCU core processing units, efficiently
Communication, orderliness is clear, and product overall performance is reliable and stable.
（4）The present invention uses wireless ethernet and wired ethernet, the dual link design of platform network communication, network access mode
Flexibly.
（5）The GPS positioning unit that the present invention uses provides clock synchronization for base station and terminal, keeps strict time synchronization.
Present inventive concept is ingenious, and scheme is reasonable, and actual verification effect is good.By in the Internet of Things industry of low-power consumption by general
All over welcome, there are good market prospects, it is real to realize that available channel detection, dynamic network switch, it avoids repaying examination networking, in time
Fall net to judge, two-way peer-to-peer communications reduce packet loss, reduce and retransmit, and are finally reached the ability of wide area covering, realize that City-level covers
Lid.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Fig. 2 is that the circuit signal of the present invention transmits schematic diagram.
Fig. 3 is the logical construction schematic diagram of the LoRa wireless data transmission units of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is further illustrated below according to Fig. 1 to Fig. 3：
Referring to Fig. 1 and Fig. 2, the base stations Internet of Things LoRa of a kind of multipath concurrence downlink, including LoRa wireless data transmission units,
Core cpu processing unit, MCU core processing units, Ethernet data transmission unit and GPS positioning unit, Ethernet data pass
Defeated unit includes wireless ethernet interface and wired ethernet interface；The LoRa wireless data transmission units are equipped with multichannel uplink
Channel and multichannel down channel realize that full-duplex communication, the LoRa wireless data transmission units and core cpu processing are single
Member is connected by spi bus, and the core cpu processing unit is used to receive terminal by LoRa wireless data transmission units and send
Upstream data packet, the core cpu processing unit is connected with wireless ethernet interface and wired ethernet interface, the CPU
Upstream data packet for being sent to away by core processing unit by wireless ethernet interface and wired ethernet interface（It sends
To background server）, the core cpu processing unit connect with the GPS positioning unit, and GPS positioning unit is at core cpu
It manages unit and sends UART signal, that is, the accurate location information of the base stations LoRa is provided；The core cpu processing unit and the MCU
Core processing unit connects, and core cpu processing unit is used for by under wireless ethernet interface and wired ethernet interface
Row data packet（The downlink data packet that background server is sent）And downlink data packet is sent to MCU core processing units, the MCU
Core processing unit is connect with the LoRa wireless data transmission units, and MCU core processing units are for leading to downlink data packet
LoRa wireless data transmission units are crossed to send（It is sent to terminal）；The GPS positioning unit with the MCU core processings
Unit is connected with the LoRa wireless data transmission units, and GPS positioning unit is respectively at core cpu processing unit, MCU cores
Reason unit and LoRa wireless data transmission units send PPS signal to provide clock synchronization, and stringent clock is kept to synchronize；Can also be
The base stations LoRa provide clock synchronization with terminal, and stringent clock is kept to synchronize.2 processors of LoRa wireless data transmission units connection
（Core cpu processing unit, MCU core processing units）High Collaboration works, and the base stations LoRa have pair that 1 tunnel is wired, 1 road is wireless
Ether network transmission channel；With accurately GIS location informations and temporal information.
Referring to Fig. 1 and Fig. 3, the LoRa wireless data transmission units in the present embodiment include wireless frequency expansion chip
It SX1301, wireless frequency expansion chip SX1255, wireless frequency expansion chip SX1278, power splitter, filter, amplifier, duplexer and penetrates
Frequency antenna, the core cpu processing unit are connect with the wireless frequency expansion chip SX1301, the wireless frequency expansion chip SX1301
It is connect with multiple wireless frequency expansion chip SX1255, the MCU core processing units and multiple wireless frequency expansion chips
SX1278 connections, multiple wireless frequency expansion chip SX1278 are connect with the power splitter, the power splitter and the filter
Connection, the filter connect with the amplifier, and the amplifier and multiple wireless frequency expansion chip SX1255 are and institute
Duplexer connection is stated, the duplexer is connected with the radio-frequency antenna；Wireless frequency expansion chip SX1301 and wireless frequency expansion chip
SX1255 receives the upstream data packet that terminal is sent by duplexer and radio-frequency antenna, concurrently send upstream data packet to core cpu
Processing unit, core cpu processing unit upload to upstream data packet by wireless ethernet interface or wired ethernet interface
Background server, core cpu processing unit receives the downlink data packet of background server feedback or background server is actively sent out
The downlink data packet gone out, and by downstream packet transmission to MCU core processing units, MCU core processing units control multichannel without
Line spread spectrum chip SX1278, and power splitter, filter, amplifier, duplexer and radio-frequency antenna are passed sequentially through by downlink data packet
It is sent to terminal.The wireless frequency expansion chip SX1255 is 2, realizes 8 road row wireless receiving channels, the wireless frequency expansion core
Piece SX1278 is 10, realizes 10 tunnel downlink wireless transmission channels.The present embodiment uses 10 discrete wireless frequency expansion chips
Multichannel is sent signal by SX1278 using power splitter, filter, amplifier, is merged into 1 tunnel, by duplexer, further
The signal that will receive be combined with signal is sent, shared 1 radio-frequency antenna.
Wireless frequency expansion chip SX1301, SX1255, SX1278 in the present embodiment, have strong antijamming capability, propagate away from
From the features such as remote, low in energy consumption；SX1301 is combined with SX1255, realizes 8 road row wireless receiving channels, the group of multi-disc SX1278
It closes, physically realizes 10 tunnel downlink wireless transmission channels, wherein 8 tunnel downlink wireless transmission channels and 8 road row wireless receivings
Channel correspond to, i.e., in scene apply with CLASS-A communication patterns, every 1 uplink packet, can have 1 correspondingly
Downlink response bag.LoRa wireless data transmission units are equipped with 8 road up channels and 10 road down channels, remove CLASS-A applications
In 8 tunnel downstream packets, also 2 road down channels, wherein 1 road down going channel, as downlink broadcast channel, another 1 road down channel is used
It is main as the down channel of background server burst in the downbound request LoRa data packets for sending background server active initiation
It will be towards the terminal applies scene of CLASS-B, CLASS-C.Wireless ethernet interface uses wireless network card, wired ethernet interface
Using wired network adapter.Core cpu processing unit is connected with backstage by wireless ethernet interface and wired ethernet interface remote
Server.
Include GPS clock synchronization unit referring to Fig. 2, in the GPS positioning unit, the GPS clock synchronization unit difference
It connect to realize at core cpu with core cpu processing unit, MCU core processing units and LoRa wireless data transmission units
It is synchronous with the clock of LoRa wireless data transmission units to manage unit, MCU core processing units.GPS clock synchronization unit also passes through
1 road downlink broadcast channel sends accurate temporal information to MCU core processing units thereto, to make row broadcast channel will be accurate
Temporal information send.
Referring to Fig. 1, the present embodiment further include Power Management Unit and reset administrative unit, the Power Management Unit with
Core cpu processing unit is connected with MCU core processing units, the reset administrative unit with core cpu processing unit and MCU
Core processing unit connects.Power Management Unit provides power supply for core cpu processing unit and MCU core processing units.It resets
Administrative unit provides reset function for core cpu processing unit and MCU core processing units.The reset administrative unit is using hard
Part house dog, hardware watchdog pass through the timer of itself detect in core cpu processing unit and MCU core processing units whether
There is program fleet phenomenon, to be resetted to core cpu processing unit and MCU core processing units, can also pass through detection
Whether core cpu processing unit and MCU core processing units there is under-voltage phenomenon, to core cpu processing unit and MCU cores
Heart processing unit is resetted.
The wireless channel of LoRa downlinks has 10 tunnels, is applied for CLASS-A, has specific down channel, as upper line number
According to the response channel of packet, answer service is provided.In addition to this, increase independent 1 road downlink broadcast channel, it is same by GPS clock
Step unit provides the terminal with accurate temporal information, provides the information such as currently available channel；The instant down channel in 1 tunnel separately is opened up,
For the application scenarios of CLASS-B, C, meet background server for the LoRa packet downbound requests actively initiated.
The base station of the present embodiment uses CPU+MCU double-core processing units, core cpu processing unit to be read by spi bus
The LoRa upstream data packets that wireless frequency expansion chip SX1301 is received are taken, by wired or wireless Ethernet, by line number on LoRa
Background server is reached according to wrapping（Application server）.Core cpu processing unit receives the down order of background server, and turns
To MCU core processing units, MCU core processing units control multichannel SX1278, and the downlink for executing LoRa data packets is sent.Double places
Device full-duplex communication is managed, is cooperated, realizes the centralized processing of LoRa data packets.The present embodiment is handled using CPU+MCU double-cores
Device cooperates, and LoRa data packets are sent and received separation, has wired and wireless 2 road ethernet communication link, forwarding
LoRa data packets are to background server.
The present embodiment has（1）GPS positioning function, provides accurate location, the temporal information of base station, and GPS is base station and end
End provides clock synchronization, and stringent clock is kept to synchronize；（2）Terminal data transmits end to end --- and base station black box, user need not close
Calculation is according to intermediate treatment link.（3）LoRaWAN protocol stacks --- the base station duplicate removal processing of data packet, single downlink connect for optimization
Receive window.（4）Up to 10 road down channels, while transmission data packet, downlink ability are 10 times of ordinary base station, really simultaneously
Meet the base stations LoRa of tri- application scenarios of CLASS-A, B, C；（5）Dual processor cooperates, and efficient communication, orderliness is clear,
Product overall performance is reliable and stable；（6）The dual link design of platform network communication, network access mode are flexible.
The base stations LoRa of the present embodiment can thoroughly solve all Internet of Things base stations based on LoRa technologies in current society
Can not multichannel downlink defect, be especially unable to the defect of multichannel symmetrical downlink simultaneously, really be able to realize that terminal node is being examined
When measuring available base stations, optimal base station communication is selected, not tentative networking blindly, not blindly in no available channel
Upstream data packet, greatly reduces the radio interference in unlicensed band, does not waste limited radio channel resource to base station
The packet that has received and the CONFIRM frames that can not reply retransmit, the response that symmetric channel generates can rapidly make net in time
Detection.For the application of CLASS-B, CLASS-C, dedicated channel is opened up, really realizes that CLASS-B, CLASS-C of LoRa are answered
With.10 road down channels, greatly reduce the complexity of base station down Scheduling Design, solve in same timeslice, uniquely
Down channel when sending, the problem of remaining data packet cannot be retransmited, entire communication network smooth sequential.It is one-to-one
Down channel, terminal node receives windows without opening multiple RX-WINDOW, reduces power consumption, extend battery life.It is more
The base stations Internet of Things LoRa of the concurrent downlink in road so that wireless channel is a closed loop link, really has construction big net, realizes city
The ability of grade covering.
Protection scope of the present invention includes but not limited to embodiment of above, and protection scope of the present invention is with claims
Subject to, any replacement being readily apparent that those skilled in the art that this technology is made, deformation, improvement each fall within the present invention's
Protection domain.
Claims (10)
1. a kind of base stations Internet of Things LoRa of multipath concurrence downlink, it is characterised in that：Including LoRa wireless data transmission units,
Core cpu processing unit, MCU core processing units, Ethernet data transmission unit and GPS positioning unit；
The LoRa wireless data transmission units are equipped with multichannel up channel and multichannel down channel, and the LoRa wireless datas pass
Defeated unit is connect with the core cpu processing unit by spi bus, and the core cpu processing unit is connected with ether netting index
According to transmission unit, the core cpu processing unit is connect with the GPS positioning unit, the core cpu processing unit with it is described
MCU core processing units connect, and the MCU core processing units are connect with the LoRa wireless data transmission units, the GPS
Positioning unit is connect with the MCU core processing units and the LoRa wireless data transmission units.
2. the base stations Internet of Things LoRa of multipath concurrence downlink according to claim 1, it is characterised in that：The ether netting index
Include wireless ethernet interface and wired ethernet interface according to transmission unit.
3. the base stations Internet of Things LoRa of multipath concurrence downlink according to claim 2, it is characterised in that：The LoRa is wireless
Data transmission unit includes wireless frequency expansion chip SX1301, wireless frequency expansion chip SX1255, wireless frequency expansion chip SX1278, work(point
Device, filter, amplifier, duplexer and radio-frequency antenna, the core cpu processing unit and the wireless frequency expansion chip SX1301
Connection, the wireless frequency expansion chip SX1301 are connect with multiple wireless frequency expansion chip SX1255, the MCU core processings list
First to be connect with multiple wireless frequency expansion chip SX1278, multiple wireless frequency expansion chip SX1278 connect with the power splitter
It connects, the power splitter is connect with the filter, and the filter is connect with the amplifier, the amplifier and multiple described
Wireless frequency expansion chip SX1255 is connect with the duplexer, and the duplexer is connected with the radio-frequency antenna；
The wireless frequency expansion chip SX1301 and wireless frequency expansion chip SX1255 is used to receive eventually by duplexer and radio-frequency antenna
The upstream data packet sent is held, concurrently send upstream data packet to core cpu processing unit, the core cpu processing unit is used for
Upstream data packet is uploaded into background server by wireless ethernet interface or wired ethernet interface, at the core cpu
Reason unit is used to receive the downlink data packet of background server transmission, and by downstream packet transmission to MCU core processing units,
MCU core processing units control multiple wireless spread spectrum chip SX1278, and pass sequentially through power splitter, filter, amplifier, duplex
Downlink data packet is sent to terminal by device and radio-frequency antenna.
4. the base stations Internet of Things LoRa of multipath concurrence downlink according to claim 3, it is characterised in that：The wireless frequency expansion
Chip SX1255 is 2, and the wireless frequency expansion chip SX1278 is 10.
5. the base stations Internet of Things LoRa of multipath concurrence downlink according to claim 4, it is characterised in that：The LoRa is wireless
Data transmission unit is equipped with 8 road up channels and 10 road down channels.
6. the base stations Internet of Things LoRa of multipath concurrence downlink according to claim 5, it is characterised in that：10 tunnel downlink
1 road down going channel in channel is downlink broadcast channel, after the another 1 road down channel in the down channel of 10 road is for sending
The downbound request LoRa data packets that platform server is actively initiated.
7. the base stations Internet of Things LoRa of multipath concurrence downlink according to claim 2, it is characterised in that：The wireless ether
Network interface uses wireless network card, the wired ethernet interface to use wired network adapter.
8. the base stations Internet of Things LoRa of multipath concurrence downlink according to claim 1, it is characterised in that：The GPS positioning
Include GPS clock synchronization unit in unit, the GPS clock synchronization unit respectively at core cpu processing unit, MCU cores
Reason unit connects to realize core cpu processing unit, MCU core processing units and LoRa with LoRa wireless data transmission units
The clock of wireless data transmission unit synchronizes.
9. the base stations Internet of Things LoRa of multipath concurrence downlink according to claim 1, it is characterised in that：It further include power supply pipe
It manages unit and resets administrative unit, the Power Management Unit connects with core cpu processing unit and MCU core processing units
It connects, the reset administrative unit is connect with core cpu processing unit and MCU core processing units.
10. the base stations Internet of Things LoRa of multipath concurrence downlink according to claim 9, it is characterised in that：The reset transistor
It manages unit and uses hardware watchdog.
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| CN201810460513.9A CN108712787B (en) | 2018-05-15 | 2018-05-15 | Multichannel concurrent downlink Internet of things LoRa base station |
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| CN201810460513.9A CN108712787B (en) | 2018-05-15 | 2018-05-15 | Multichannel concurrent downlink Internet of things LoRa base station |
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| CN109634223A (en) * | 2018-10-31 | 2019-04-16 | 武汉三力通信有限责任公司 | A kind of platform of internet of things based on 3LIOT |
| CN110662259A (en) * | 2019-12-02 | 2020-01-07 | 武汉慧联无限科技有限公司 | Message processing method and device and computer storage medium |
| CN111131010A (en) * | 2019-04-03 | 2020-05-08 | 利尔达科技集团股份有限公司 | Multichannel full duplex thing networking gateway based on LoRaWAN |
| CN111315041A (en) * | 2020-02-13 | 2020-06-19 | 东南大学 | Full-duplex LoRa gateway supporting LoRaWAN protocol |
| CN111741544A (en) * | 2020-06-15 | 2020-10-02 | 国动物联网有限公司 | LORA full duplex base station based on GSM communication chip |
| CN111918394A (en) * | 2019-05-09 | 2020-11-10 | 深圳长城开发科技股份有限公司 | LoRa terminal uplink data method, LoRa terminal, LoRa network and storage medium |
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| CN111918394A (en) * | 2019-05-09 | 2020-11-10 | 深圳长城开发科技股份有限公司 | LoRa terminal uplink data method, LoRa terminal, LoRa network and storage medium |
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| CN111315041A (en) * | 2020-02-13 | 2020-06-19 | 东南大学 | Full-duplex LoRa gateway supporting LoRaWAN protocol |
| CN111741544A (en) * | 2020-06-15 | 2020-10-02 | 国动物联网有限公司 | LORA full duplex base station based on GSM communication chip |
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