CN104735715A - Wireless multi-channel communication device and multi-channel real-time communication method - Google Patents
Wireless multi-channel communication device and multi-channel real-time communication method Download PDFInfo
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- CN104735715A CN104735715A CN201510075436.1A CN201510075436A CN104735715A CN 104735715 A CN104735715 A CN 104735715A CN 201510075436 A CN201510075436 A CN 201510075436A CN 104735715 A CN104735715 A CN 104735715A
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- 238000004891 communication Methods 0.000 title claims abstract description 63
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- 238000005070 sampling Methods 0.000 abstract description 5
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
- H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
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Abstract
The invention discloses a wireless multi-channel communication device and a multi-channel real-time communication method. The device comprises receiving units, sending units and a central coordination processing unit, wherein the receiving units are used for receiving data on a set wireless channel, the sending units are used for sending data on an appointed wireless channel, and the central coordination processing unit is electrically connected with the receiving units and the sending units and used for acquiring the data received by the receiving units in real time. When data need to be emitted, an idle wireless channel used by the sending units is appointed according to states of the current wireless channels, and the data needing to be sent on the idle wireless channel are transmitted to the sending units. By means of the device and method, the conditions of the channels can be monitored at the same time, accurate channel busy and idle distinguishing threshold values are acquired according to effectively receiving and continuous sampling, whether collisions or distortion is produced or not can be judged according to a data package emitted by the device, very high real-time performance is achieved, and communication delay caused by channel conflict can be avoided.
Description
Technical field
The present invention relates to wireless communication technology field, refer to a kind of Wireless Multi-Channel communicator and multi channel real-time communication method especially.
Background technology
At present, communication equipment great majority in cordless communication network are the transmitting-receivings carrying out data for single channel, and in cordless communication network, between each communication node, there is the usufructuary race problem of channel, namely at the transceiver of same band operation, during if there is two and the above wireless signal of transmission simultaneously, communication can be caused destroyed because of the mutual interference of signal.Had multiple channel competition agreement to solve this problem, but essence is all need the node simultaneously sending wireless signal to carry out priority tissue by ordered pair, can cause the communication delay of some node.Needing the occasion of real-time wireless communication, this delay cannot be stood, between the automobile such as travelled on a highway, communicated by onboard wireless system, need to carry out the mutual of running information by wireless signal, thus providing more safety guarantee for driver, the hundreds of millisecond delay that radio communication conflict in this case causes all likely causes the accident between vehicle to occur.Need a kind of mechanism that transceiver can send data at any time that ensures, this mechanism can realize timely communication when wireless terminal emergency situation occurs well, meets the radio network product demand having high requirement of real time for this reason.
Summary of the invention
In view of this, the object of the invention is to propose a kind of Wireless Multi-Channel communicator and multi channel real-time communication method, multiple channel conditions can be monitored and selective channel transmission data simultaneously.
The invention provides a kind of Wireless Multi-Channel communicator based on above-mentioned purpose, comprising: receiving element, on the wireless channel in setting, receive data; Transmitting element, for sending data on the wireless channel of specifying; Central co-ordination process unit, be electrically connected with multiple described receiving element and described transmitting element respectively, for the data that the multiple described receiving element of Real-time Obtaining receives, when needs transmitting data, according to the idle wireless channel that the state of current each wireless channel specifies described transmitting element to use, and will on this idle wireless channel, the data sent be needed to be transferred to described transmitting element.
According to one embodiment of present invention, further, address selection unit is set between described Central co-ordination process unit and each receiving element; Described address selection unit is connected with described Central co-ordination process unit with data/address bus by address bus, and described address selection unit is connected with corresponding receiving element by data/address bus; Wherein, described receiving element unifies layout by address, is distinguished mutually by address number; Described Central co-ordination process unit is connected with described transmitting element by serial communication bus.
According to one embodiment of present invention, further, the wireless channel set by multiple described receiving element is not identical, and each described receiving element monitors corresponding wireless channel, the received signal strength indicator RSSI value of Real-time Obtaining wireless channel, and be sent to FPDP; Receiving element described in described Central co-ordination process unit circulation gating, obtains described RSSI value by data/address bus.
According to one embodiment of present invention, further, each described receiving element is connected with described Central co-ordination process unit by independently condition line; Upon reception of the data packet, described receiving element obtains the RSSI value of current radio channel, and sends triggering signal by described condition line to described Central co-ordination process unit, and the RSSI value of described packet and described current radio channel is sent to FPDP; Wherein, described triggering signal comprises: low level signal; When described Central co-ordination process unit receives described triggering signal, determine the receiving element that described triggering signal is corresponding, by data/address bus from then on receiving element obtain the RSSI value of described packet and described current radio channel.
According to one embodiment of present invention, further, according to the RSSI value obtained, described Central co-ordination process unit judges whether wireless channel is in free time or busy condition; When sending out data, the wireless channel of described Central co-ordination process unit selection free time also sets the wireless channel that described transmitting element is operated in this free time, is transferred to described transmitting element by needing the data sent by serial communication bus.
According to one embodiment of present invention, further, after data are sent by the channel of described free time by described transmitting element, the described receiving element being operated in the wireless channel identical with the channel of described free time receives this data be sent out; Whether the data be sent out that described in described Central co-ordination process unit judges, receiving element receives are identical with the data of original transmission, if so, then judge to send data success.
A kind of multi channel real-time communication method, comprising: multiple receiving element receives data on the wireless channel of setting, the data that the multiple receiving element of Real-time Obtaining receives; When needs transmitting data, according to the idle wireless channel that the state of current each wireless channel specifies transmitting element to use, and will on this idle wireless channel, the data sent be needed to be transferred to transmitting element; Described transmitting element sends data on the wireless channel of specifying.
According to one embodiment of present invention, further, described receiving element unifies layout by address, is distinguished mutually by address number; Wireless channel set by multiple described receiving element is not identical, and each described receiving element monitors corresponding wireless channel, the received signal strength indicator RSSI value of Real-time Obtaining wireless channel, and is sent to FPDP; Receiving element described in circulation gating, obtains described RSSI value by data/address bus.
According to one embodiment of present invention, further, upon reception of the data packet, described receiving element obtains the RSSI value of current radio channel, and send triggering signal by condition line, the RSSI value of described packet and described current radio channel is sent to FPDP; Wherein, described triggering signal comprises: low level signal; When receiving described triggering signal, determine the receiving element that described triggering signal is corresponding, by data/address bus from then on receiving element obtain the RSSI value of described packet and described current radio channel.
According to one embodiment of present invention, further, judge whether wireless channel is in free time or busy condition according to the RSSI value obtained; When sending out data, choosing idle wireless channel and set the wireless channel that described transmitting element is operated in this free time, being transferred to described transmitting element by needing the data sent by serial communication bus; After data are sent by the channel of described free time by described transmitting element, the described receiving element being operated in the wireless channel identical with the channel of described free time receives this data be sent out; Whether the data be sent out that described in described Central co-ordination process unit judges, receiving element receives are identical with the data of original transmission, if so, then judge to send data success.
As can be seen from above, Wireless Multi-Channel communicator of the present invention and multi channel real-time communication method, multiple receiving element can receive the data on different radio channel simultaneously, and when sending data, real-time selection suitable channel carries out the transmission of data, realizes reliable radio communication.Multiple channel conditions can be monitored simultaneously, according to effectively reception and continuous sampling obtain the threshold value of channel busy differentiation accurately, and the packet by receiving its own transmission judges whether to produce collision or distortion, has high real-time, can avoid the communication delay because channel confliction causes.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment of Wireless Multi-Channel communicator of the present invention;
Fig. 2 is the schematic diagram of another embodiment of Wireless Multi-Channel communicator of the present invention;
Fig. 3 is by the schematic diagram of Wireless Multi-Channel communicator network consisting of the present invention;
Fig. 4 is the flow chart of an embodiment of multi channel real-time communication method of the present invention.
Fig. 5 is the workflow diagram of the reception data of an embodiment of multi channel real-time communication method of the present invention;
Fig. 6 is the workflow diagram processed reception data of an embodiment of multi channel real-time communication method of the present invention;
Fig. 7 is the workflow diagram of the inspection transmission data of an embodiment of multi channel real-time communication method of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 1 is the schematic diagram of an embodiment of Wireless Multi-Channel communicator of the present invention, and as shown in Figure 1, receiving element 12,13,14 receives data on the wireless channel of setting.Transmitting element 15 sends data on the wireless channel of specifying.Central co-ordination process unit 11 is respectively with multiple receiving element 12,13,14 with send 15 and be electrically connected, the data that the multiple receiving element 12,13,14 of Real-time Obtaining receives, when needs transmitting data, according to the idle wireless channel that the state of current each wireless channel specifies transmitting element 15 to use, and will on this idle wireless channel, the data sent be needed to be transferred to transmitting element.
Wireless Multi-Channel communicator of the present invention, multiple receiving element can receive the data on different radio channel simultaneously, and real-time selection suitable channel carries out the transmission of data when sending data, realizes in real time radio communication reliably.Channel has certain frequency bandwidth, and multiple wireless channel can be divided by the wireless frequency of work, or different receiving elements can adopt different agreements, such as wifi, bluetooth, CDMA etc.
Fig. 2 is the schematic diagram of another embodiment of Wireless Multi-Channel communicator of the present invention, as shown in Figure 2, at Central co-ordination process unit (or Central co-ordination process device) 21 and each receiving element (or receiver) 1,2 ... address selection unit 1,2 is all set between n ... n.Address selection unit 1,2 ... n is connected with Central co-ordination process unit 21 with data/address bus by address bus, address selection unit 1,2 ... n is by data/address bus and corresponding receiving element 1,2 ... n connects.Receiving element 1,2 ... n unifies layout by address, is distinguished mutually by address number.Central co-ordination process unit 21 is connected with transmitting element (or transmitter) 23 by serial communication bus.
Multiple receiving element 1,2 ... n can be operated in different communication channels, unifies layout by address, is all connected with Central co-ordination process unit 21 by address bus, data/address bus and condition line.Central co-ordination process unit 21 is by receiving element 1,2 ... n detects the state of each channel, and then control transmitter unit 23 works in allocated channel and carries out real-time reliable communication.
Multiple receiving element 1,2 ... wireless channel set by n is not identical, and each receiving element monitors corresponding wireless channel, the received signal strength indicator RSSI value of Real-time Obtaining wireless channel, and is sent to FPDP.Central co-ordination process unit circulation gating receiving element, obtains RSSI value by data/address bus.
In one embodiment, receiving element 1 is made up of microprocessor and wireless communication unit circuit, microprocessor has two FPDP, one for depositing the Content of Communication received, one for depositing the signal strength signal intensity numerical value of residing channel, two FPDP all have data buffer storage ability, and are connected with the data/address bus of Central co-ordination process machine.
Each receiving element 1,2 ... n passes through independently condition line and is connected with Central co-ordination process unit 21.Upon reception of the data packet, receiving element obtains the RSSI value of current radio channel, and sends triggering signal by condition line to Central co-ordination process unit, and the RSSI value of packet and current radio channel is sent to FPDP.Triggering signal comprises: low level signal etc.When central Coordination Treatment unit 21 receives triggering signal, determine the receiving element that triggering signal is corresponding, by data/address bus from then on receiving element obtain the RSSI value of packet and current radio channel.
In one embodiment, Central co-ordination process unit 21 is by receiving element 1,2 ... n detects each channel status, is by receiving element 1,2 ... n initiatively initiates.The microprocessor one of each receiving element obtains the signal strength values of place channel straight through wireless communication unit circuit, and be placed on signal strength data port, judge whether to receive wireless data simultaneously, if receive, inform Central co-ordination process unit 21 by the mode changing status signal lines level, then by this receiving element of Central co-ordination process unit 21 gating, Content of Communication and channel strength is obtained.
The working channel real-time change of transmitter unit 23, is selected according to the free time of current all channels and busy condition by Central co-ordination process unit 21.Central co-ordination process unit 21 has two sample datas for the signal strength signal intensity that each communication control processor gathers, signal strength signal intensity when this channel does not have communication event (namely receiving data) to occur deposited by one group of sample, and signal strength signal intensity when communication event (namely receiving data) occurs deposited by one group of sample.Central co-ordination process unit 21 is constantly updated the busy or idle signal strength signal intensity of channel according to group sample values of two in certain hour and is divided threshold value.
Wireless Multi-Channel communicator of the present invention, multiple channel conditions can be monitored simultaneously, there is parallel communications disposal ability, according to effectively reception and continuous sampling obtain the threshold value of channel busy differentiation accurately, and channel confliction situation can be judged by own receiver, there is high real-time.
In one embodiment, when sending out data, Central co-ordination process unit 21 is chosen idle wireless channel and is set the wireless channel that transmitting element 23 is operated in this free time, is transferred to transmitting element 23 by needing the data sent by serial communication bus.
Be sent out after unit 23 sent by idle channel in data, the receiving element 1 being operated in the wireless channel identical with the channel of free time receives this data be sent out.Central co-ordination process unit 21 judges that whether the data be sent out that receiving element 1 receives are identical with the data of original transmission, if so, then judges to send data success.
The communication reliability of Wireless Multi-Channel communicator of the present invention is that can the packet that receive device its own transmission by transmitting element judge.By the wireless signal that transmitter unit sends, if the receiving element being in same working channel receives, and data content and transmission content completely the same, then illustrate that emission process inerrancy produces, data communication success, otherwise think that channel produces collision or distorted signals, need to resend.
Wireless Multi-Channel communicator of the present invention, can judge whether the packet of its own transmission produces collision or distortion, support that the wireless terminal of a greater number in same wireless network works simultaneously, to be particularly suitable between automobile Data Concurrent amount large and to the extra high occasion of real-time communication requirement.
If Fig. 3 is the vehicular wireless network be made up of Wireless Multi-Channel communicator of the present invention, Wireless Multi-Channel communicator 31,32 is separately positioned on different automobiles.On other wireless channel, information transmission can be carried out between device in system simultaneously, realize in same radio coverage, communicate while between any two communication nodes, concurrent working and separate.
In one embodiment, Wireless Multi-Channel communicator of the present invention is with Central co-ordination process unit 21, several identical communication control processors 22, several address selection units 29 and a radio communication transmitter unit 23, and each receiving element 22 is operated on different wireless channels.
Each receiving element 22 is communicated with Central co-ordination process unit 21 independently by condition line 26, and condition line controls by receiving element 22, is high level at ordinary times.The initialization of equipment is carried out after each receiving element 22 powers on, respective radio channels is operated according to self program setting, be in accepting state, the numerical value of the received signal strength RSSI of real-time sampling present channel is also placed on data/address bus 24, judge whether that complete packet arrives simultaneously, when the partial data signal that the respective radio channels that receiving element 22 receives other Wireless Multi-Channel communicator of the same type is sent, condition line 26 level is dragged down.
Central co-ordination process unit 21 circulates gating each road communication control processor, and obtains the signal strength values on wireless channel that each receiving element senses in real time.Simultaneously, the low level that condition line 26 occurs can trigger Central co-ordination process unit 21 and enter interrupt status, Central co-ordination process device 21 is had no progeny in entering and being caused by this kind of situation, the interruption which road receiving element causes can be judged, and read the signal strength values of complete data-signal and the current radio channel that receiving element receives, as one of foundation judging channel busy next time.
When needs transmitting data, Central co-ordination process unit 21, by judging the busy situation of each channel of current time, selects an idle channel, and setting transmitter unit 23 is operated in this idle channel, and by needing the content sent to be transferred to transmitter unit 23 by serial communication bus, send immediately.Data battery has fired, the corresponding receiving element 30 launching channel receives the data content that transmitter unit 23 has sent, and causes the low level of condition line 26, triggered interrupts, judges whether successful launch by Central co-ordination process unit 21.
Fig. 4 is the flow chart of an embodiment of multi channel real-time communication method of the present invention.As shown in Figure 4:
Step 301, multiple receiving element receives data on the wireless channel of setting.
Step 302, the data that the multiple receiving element of Real-time Obtaining receives; When needs transmitting data, according to the idle wireless channel that the state of current each wireless channel specifies transmitting element to use, and will on this idle wireless channel, the data sent be needed to be transferred to transmitting element.
Step 303, transmitting element sends data on the wireless channel of specifying.
Receiving element unifies layout by address, is distinguished mutually by address number.Wireless channel set by multiple receiving element is not identical, and each receiving element monitors corresponding wireless channel, the received signal strength indicator RSSI value of Real-time Obtaining wireless channel, and is sent to FPDP; Circulation gating receiving element, obtains RSSI value by data/address bus.
Fig. 5 is the workflow diagram of the reception data of an embodiment of multi channel real-time communication method of the present invention; As shown in Figure 5:
Step 401, the radio communication circuit arranging receiving element is receiving system.
Step 402, the received signal strength indicator RSSI value of Real-time Obtaining wireless channel, and be sent to FPDP.
Step 403, judges whether to receive packet, if yes then enter step 404, if not, returns step 402.
Step 404, arranging condition line numerical value is M.
Step 405, upon reception of the data packet, receiving element obtains the RSSI value of current radio channel, and sends triggering signal by condition line, and the M byte of packet and the RSSI value of current radio channel are sent to FPDP; Triggering signal comprises: low level signal etc.
Step 406,407,408, by complete for the data packet transmission received.
When receiving triggering signal, determine the receiving element that triggering signal is corresponding, by data/address bus from then on receiving element obtain the RSSI value of packet and current radio channel.
Fig. 6 is the workflow diagram processed reception data of an embodiment of multi channel real-time communication method of the present invention, as shown in Figure 6:
Step 501, the low level that condition line occurs can trigger and enter interruption 1 state.
Step 502, enters in being caused by this kind of situation and has no progeny, judge the interruption which road receiving element causes.
Step 503,505, reading state bus and data/address bus, the complete data-signal received from receiving element and the signal strength values of current radio channel also store, as judge next time channel busy according to one of.
Step 506, upgrades the RSSI threshold value of wireless channel.
Fig. 7 is the workflow diagram of the inspection transmission data of an embodiment of multi channel real-time communication method of the present invention; As shown in Figure 7:
Step 601, needs to carry out transmission data, enters interruption 2 state.
Step 602,603, the RSSI value according to obtaining judges whether wireless channel is in free time or busy condition; When sending out data, choosing idle wireless channel and set the wireless channel that transmitting element is operated in this free time, being transferred to transmitting element by needing the data sent by serial communication bus.
Step 604, sends data.
Step 605, be sent out after unit sent by idle channel in data, the receiving element being operated in the wireless channel identical with the channel of free time receives this data be sent out.Whether the data be sent out that Central co-ordination process unit judges receiving element receives are identical with the data of original transmission, if so, then judge to send data success.
The Wireless Multi-Channel communicator that above-described embodiment provides and multi channel real-time communication method, multiple receiving element can receive the data on different radio channel simultaneously, and when sending data, real-time selection suitable channel carries out the transmission of data, realizes reliable radio communication.Multiple channel conditions can be monitored simultaneously, according to effectively reception and continuous sampling obtain the threshold value of channel busy differentiation accurately, and the packet by receiving its own transmission judges whether to produce collision or distortion, has high real-time, can avoid the communication delay because channel confliction causes.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a Wireless Multi-Channel communicator, is characterized in that, comprising:
Receiving element, receives data on the wireless channel in setting;
Transmitting element, for sending data on the wireless channel of specifying;
Central co-ordination process unit, be electrically connected with multiple described receiving element and described transmitting element respectively, for the data that the multiple described receiving element of Real-time Obtaining receives, when needs transmitting data, according to the idle wireless channel that the state of current each wireless channel specifies described transmitting element to use, and will on this idle wireless channel, the data sent be needed to be transferred to described transmitting element.
2. device as claimed in claim 1, is characterized in that:
Between described Central co-ordination process unit and each receiving element, address selection unit is set;
Described address selection unit is connected with described Central co-ordination process unit with data/address bus by address bus, and described address selection unit is connected with corresponding receiving element by data/address bus; Wherein, described receiving element unifies layout by address, is distinguished mutually by address number;
Described Central co-ordination process unit is connected with described transmitting element by serial communication bus.
3. device as claimed in claim 1 or 2, is characterized in that:
Multiple described receiving element is all operated in different wireless channels, and each described receiving element monitors corresponding wireless channel, the received signal strength indicator RSSI value of Real-time Obtaining wireless channel, and is sent to FPDP;
Receiving element described in described Central co-ordination process unit circulation gating, obtains described RSSI value by data/address bus.
4. device as claimed in claim 3, is characterized in that:
Each described receiving element passes through independently condition line and is connected with described Central co-ordination process unit;
Upon reception of the data packet, described receiving element obtains the RSSI value of current radio channel, and sends triggering signal by described condition line to described Central co-ordination process unit, and the RSSI value of described packet and described current radio channel is sent to FPDP; Wherein, described triggering signal comprises: low level signal;
When described Central co-ordination process unit receives described triggering signal, determine the receiving element that described triggering signal is corresponding, by data/address bus from then on receiving element obtain the RSSI value of described packet and described current radio channel.
5. device as claimed in claim 4, is characterized in that:
According to the RSSI value obtained, described Central co-ordination process unit judges whether wireless channel is in free time or busy condition;
When sending out data, the wireless channel of described Central co-ordination process unit selection free time also sets the wireless channel that described transmitting element is operated in this free time, is transferred to described transmitting element by needing the data sent by serial communication bus.
6. device as claimed in claim 5, is characterized in that:
After data are sent by the channel of described free time by described transmitting element, the described receiving element being operated in the wireless channel identical with the channel of described free time receives this data be sent out;
Whether the data be sent out that described in described Central co-ordination process unit judges, receiving element receives are identical with the data of original transmission, if so, then judge to send data success.
7. a multi channel real-time communication method, is characterized in that, comprising:
Multiple receiving element receives data on the wireless channel of setting;
The data that the multiple receiving element of Real-time Obtaining receives; When needs transmitting data, according to the idle wireless channel that the state of current each wireless channel specifies transmitting element to use, and will on this idle wireless channel, the data sent be needed to be transferred to transmitting element;
Described transmitting element sends data on the wireless channel of specifying.
8. method as claimed in claim 7, is characterized in that:
Described receiving element unifies layout by address, is distinguished mutually by address number;
Multiple described receiving element is all operated in different wireless channels, and each described receiving element monitors corresponding wireless channel, the received signal strength indicator RSSI value of Real-time Obtaining wireless channel, and is sent to FPDP;
Receiving element described in circulation gating, obtains described RSSI value by data/address bus.
9. method as claimed in claim 8, is characterized in that:
Upon reception of the data packet, described receiving element obtains the RSSI value of current radio channel, and sends triggering signal by condition line, and the RSSI value of described packet and described current radio channel is sent to FPDP; Wherein, described triggering signal comprises: low level signal;
When receiving described triggering signal, determine the receiving element that described triggering signal is corresponding, by data/address bus from then on receiving element obtain the RSSI value of described packet and described current radio channel.
10. method as claimed in claim 9, is characterized in that:
RSSI value according to obtaining judges whether wireless channel is in free time or busy condition;
When sending out data, choosing idle wireless channel and set the wireless channel that described transmitting element is operated in this free time, being transferred to described transmitting element by needing the data sent by serial communication bus;
After data are sent by the channel of described free time by described transmitting element, the described receiving element being operated in the wireless channel identical with the channel of described free time receives this data be sent out;
Whether the data be sent out that described in described Central co-ordination process unit judges, receiving element receives are identical with the data of original transmission, if so, then judge to send data success.
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| CN111653078A (en) * | 2020-05-28 | 2020-09-11 | 北京萨达智能技术有限公司 | Tower crane anti-collision data transceiving device and method based on wireless data transmission |
| CN117771460A (en) * | 2024-02-27 | 2024-03-29 | 中国人民解放军东部战区总医院 | Remote monitoring method and system for portable hemodialysis equipment |
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| CN117771460A (en) * | 2024-02-27 | 2024-03-29 | 中国人民解放军东部战区总医院 | Remote monitoring method and system for portable hemodialysis equipment |
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