CN103619075A - Health sensor network and communication method - Google Patents
Health sensor network and communication method Download PDFInfo
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- CN103619075A CN103619075A CN201310673007.5A CN201310673007A CN103619075A CN 103619075 A CN103619075 A CN 103619075A CN 201310673007 A CN201310673007 A CN 201310673007A CN 103619075 A CN103619075 A CN 103619075A
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Abstract
The invention discloses a health sensor network and a communication method, wherein the health sensor network forms a distributed structure network by physiological parameter collection nodes, relays and a monitoring terminal, and the adjacent physiological parameter collection nodes are connected with the relays in series. The health sensor network is characterized in that data transmission modules and instruction transmission modules are arranged inside the physiological parameter collection nodes and the relays; the data transmission modules in the physiological parameter collection nodes and the relays are connected through an independent wireless communication module, so as to achieve transmission of collected data; instruction transmission modules in the physiological parameter collection nodes and the relays are connected through the independent wireless communication module, so as to achieve instruction transmission from the monitoring terminal.
Description
Technical field
The invention relates to the technology, particularly a kind of healthy sensing network and the means of communication of utilizing network to realize physiological health monitoring.
Background technology
Large-scale sensing network is widely used in military affairs, environment, medical treatment and the field such as commercial.In some application, as seismic prospecting, monitoring structural health conditions and military monitoring aspect, due to circumstance complication, the reason such as nodal pitch is large, data transfer rate is large, so traditional biography inductor networking mode is difficult to meet the demands.For example, according to application demand, the large line of the transmission of sensing network adopts Double-strand transmission, and euclidean distance between node pair reaches 220 m.So large spacing can cause the high attenuation of twisted-pair feeder terminal transmission pickup electrode, and data transfer rate declines rapidly, adds and needs low-power consumption, does not have ready-made solution can reach transmission rate 24 Mb/s; From common communication network, its load is random, and data flow needs complicated route, have the different grades of service, on upper-layer protocol, also will provide a large amount of application services, thereby data transmission efficiency is not high, real-time is not strong, cannot meet sensing network requirement.
The transmission method > > of Chinese patent application 200610005474.0 < < sensor network systems, data disclose " a kind of for be suppressed at the movably sensor node of accommodating huge number sensor network, server process and network load.Utilize management server DRS for each sensor node setting: from carrying out a plurality of distributed data processing server DDS of data management of sensor node, become the distributed server DDS of the master server of the data that store removable sensor node, in each distributed server DDS, in the situation that received the data from sensor node, identification is should be by the sensor node of own management data, or the sensor node by other Distributed Services management, if this recognition result is the sensing data by other Distributed Services management, the setting based on management server DRS, to the distributed server DDS-1 corresponding with master server, transmit data " scheme.This scheme is mainly for network load in mobile sensor problem, and do not solve the above problems.
Summary of the invention
Object of the present invention proposes a kind of sensing network and means of communication that are applied to health supervision, by the structure between physiological parameter acquisition node and connected mode, improve to improve data transmission bauds, and the protocol stack structure of passage simplifies to reach the raising of data transmission bauds, strengthen real-time and meet low-power consumption long-distance sensing network communication requirement.
The present invention is achieved by the following scheme:
A kind of healthy sensing network, by physiological parameter acquisition node, relaying and monitoring terminal, form distributed frame network, and be connected in series between adjacent physiological parameter acquisition node and relaying, it is characterized in that, in described physiological parameter acquisition node and relaying, be provided with data transmission module and command module; Between physiological parameter acquisition node and the data transmission module of relaying, by wireless communication module independently, connect to realize the transmission of image data; The command module of physiological parameter acquisition node and relaying is transmitted by the instruction that independently wireless communication module is connected to realize from monitoring terminal.
Between the data transmission module of the above, adopt HDTP agreement to carry out transfer of data; Between described command module, adopt RS485 communications protocol to carry out command;
Communication protocol stack between the data transmission module of the above has three-decker, and protocol stack is respectively physical layer, data link layer and application layer from bottom to top; Described wireless communication module is RFID module, bluetooth module or infrared module.
Means of communication for healthy sensing network, are applied to above-mentioned healthy sensing network for a kind of, realize the data of physiological parameter acquisition node, relaying and monitoring terminal and the method for command, it is characterized in that, comprise the steps:
Physiological parameter acquisition node or relaying carry out signals collecting and digitlization, and by data transmission module and independently uplink network passage to monitoring terminal, carry out data upload and converge step;
Physiological parameter acquisition node or relaying by command module and independently downlink network passage receive or transmit the instruction step from monitoring terminal.
Wherein, the described uplink network passage that passes through carries out data upload process steps and comprises, uplink network passage MAC layer, from LLC layer receiving element data, is then carried out medium access rules, checks whether uplink network can send; When uplink network can send, it will become mac frame to be sent to physical layer to data encapsulation;
The MAC layer of physiological parameter acquisition node is received after the data that other physiological parameter acquisition node transmits, and by destination address in mac frame, judges, if send to the mistake circuit-switched data of other node, by physical layer, forwards this frame at once; If give own data, the numerical value of the CRC with in bag is checked bag data whether correctly and data deliver to LLC layer; LLC layer provides data link services to application layer;
The described downlink network passage that passes through carries out passing process steps under instruction and comprises, downlink network passage adopts host node to transmit the instruction from monitoring terminal to the mode of the next node transmission by RS485 interface and communication protocol; The next node receives orders and directly to subordinate, forwards after frame, judges that whether its command address is identical with this node address, makes response according to command context if identical simultaneously.
The inventive method in sum has following distinguishing feature:
1. between physiological parameter acquisition node, adopt independently up or command module, and adopt independent passage; Taken into full account data upload two large, instruction Bottom Runby requires high feature;
2. the communication protocol stack that data or instruction are uploaded is simplified;
3. provide a kind of new transducer to connect and the means of communication.
Accompanying drawing explanation
Fig. 1 is sensing network structure chart;
Fig. 2 is the syndeton schematic diagram of physiological parameter acquisition node.
Embodiment
embodiment mono-
As illustrated in fig. 1 and 2, healthy sensing network of the present invention is the same with common sensing network, all having physiological parameter acquisition node, relaying and monitoring terminal forms, and adopt cascade connection type chain network structure, be the series connection of some relayings and carry out communication with monitoring terminal, and most of node converge at after by the chain that is in series nearby relaying again with monitoring terminal communication.
Owing to needing swap data between each node and monitoring terminal, according to the application demand of large-scale wired healthy sensing network, to data communication, should there is following performance requirement:
1) real-time data transmission: sensing network is generally worked in the wild, environmental condition is severe, except the dry cable of the transmission between relaying and monitoring terminal adopts optical fiber, between general node and node, transmits the multiplex traditional cable transmission of large line.Network size is large, and the physiological parameter acquisition node a few days is numerous, and the pressure of real-time data transmission is mainly at the large line of transmission.When data acquisition rate is large, the transmission means of shared bus just can not adapt to, therefore the cascade system of must employing uploading step by step.
2) low-power consumption: physiological parameter acquisition node adopts more complicated embedded system, usings high-performance cpu chip as master controller and data processor, also comprises Yi Luhuoji road High-resolution Data Acquisition Circuit; Need the signal of receiving sensor and the order that the large line of transmission is sent to, complete from a series of activities such as signal condition, digitlization, data transaction and data framing, local storage, transfer of data.Physiological parameter acquisition node adopts powered battery, extremely responsive to power consumption, and total system power consumption is had a significant impact.The power consumption of the single physiological parameter acquisition node of General Requirements is less than 2 W.
3) require Information Monitoring reliable, transmit transparently, image data does not generally allow to abandon and error code in transmitting procedure.
4) for meeting field construction needs, alleviate the large line weight of transmission as far as possible, therefore adopt holding wire and power line multiplex technique.Holding wire can carry out power delivery to adjacent node in the number of the delivering a letter while.
For above-mentioned requirements, in the present invention program, in physiological parameter acquisition node and relaying, be provided with data transmission module and command module (as shown in Figure 2); Wherein, data transmission module adopts Long Range Ethernet chip to transmit signal driver and the signal equalization of large line as PHY chip; Command module preferably adopts as carries out asynchronous communication with RS485 interface chip.As shown in Figure 2, between data transmission module, by independent wireless communication module, connect as twisted-pair feeder, and realize the data upload between physiological parameter acquisition node by data transmission module; And also by independent wireless communication module, connect as twisted-pair feeder between command module, and by command module, realize the transmission of monitoring terminal instruction.Data transmission module adopts HDTP agreement to carry out transfer of data; And between command module, adopt RS485 communications protocol to carry out command.
Data transmission module adopts HDTP protocol stack to have three-decker, and protocol stack is respectively physical layer, data link layer and application layer from bottom to top.Wherein data link layer is divided into logical link control sublayer (LLC) and MAC sublayer (MAC).Physical layer: simple but healthy and strong signal modulation and data transmit-receive is mainly provided, completes the transmission of bit stream.Data link layer: be responsible for data framing, frame detection, frame synchronization, medium access control, error control and transparent transmission, mainly comprise logical link control sublayer (LLC) and MAC sublayer (MAC).
Below these healthy sensing network means of communication are further described:
Comprise on the whole two large steps, physiological parameter acquisition node or relaying carry out signals collecting and digitlization, and by data transmission module and independently uplink network passage to monitoring terminal, carry out data upload and converge step; Physiological parameter acquisition node or relaying by command module and independently downlink network passage receive or transmit the instruction step from monitoring terminal.
Be specially: downlink network passage adopts host node to transmit the instruction from monitoring terminal to the mode of the next node transmission by RS485 interface and communication protocol; The next node receives orders and directly to subordinate, forwards after frame, judges that whether its command address is identical with this node address, makes response according to command context if identical simultaneously.Downlink network passage, because transmission data rate requires lower (hundreds of kb-ps), is used RS485 interface chip, by a pair of twisted-pair feeder, adopts asynchronous communication model to realize.RS485 adopts balance to send and realizes and communicating by letter with differential received mode, low in energy consumption, and transmission range surpasses 300m.
Uplink network passage MAC layer, from LLC layer receiving element data, is then carried out medium access rules, checks whether uplink network can send; When uplink network can send, it will become mac frame to be sent to physical layer to data encapsulation; The MAC layer of physiological parameter acquisition node is received after the data that other physiological parameter acquisition node transmits, and by destination address in mac frame, judges, if send to the mistake circuit-switched data of other node, by physical layer, forwards this frame at once; If give the data of oneself, the numerical value of the CRC with in bag is checked bag data whether correct.If assay is correct, data are delivered to LLC layer; If mistake is found in check, inform that sending node resends.LLC layer provides data link services to application layer, is responsible for Frame to be transferred to another node from a node inerrancy.The work that LLC layer need to complete is mainly to receive the data queue that application layer passes down, builds protocol element, to media access control sublayer transmission; Receive the protocol frame data of being come up by media access control sublayer transmission simultaneously, be uploaded to application layer.Congestion control adopts the preferential strategy forwarding of the frame data of passing by one's way, and each Frame sends and waits for as transmitting a frame time like this.
Claims (7)
1. a healthy sensing network, by physiological parameter acquisition node, relaying and monitoring terminal, form distributed frame network, and be connected in series between adjacent physiological parameter acquisition node and relaying, it is characterized in that, in described physiological parameter acquisition node and relaying, be provided with data transmission module and command module; Between physiological parameter acquisition node and the data transmission module of relaying, by wireless communication module independently, connect to realize the transmission of image data; The command module of physiological parameter acquisition node and relaying is transmitted by the instruction that independently wireless communication module is connected to realize from monitoring terminal.
2. healthy sensing network as claimed in claim 1, is characterized in that, the communication protocol stack between described data transmission module has three-decker, and protocol stack is respectively physical layer, data link layer and application layer from bottom to top.
3. healthy sensing network as claimed in claim 1, is characterized in that, described physiological parameter acquisition node, relaying have one or more.
4. healthy sensing network as claimed in claim 1, is characterized in that, described wireless communication module is RFID module, bluetooth module or infrared module.
5. the means of communication of a healthy sensing network, for a kind of arbitrary described healthy sensing network of claim 1 to 5 that is applied to, realize the data of physiological parameter acquisition node, relaying and monitoring terminal and the method for command, it is characterized in that, comprise the steps:
Physiological parameter acquisition node or relaying carry out signals collecting and digitlization, and by data transmission module and independently uplink network passage to monitoring terminal, carry out data upload and converge step;
Physiological parameter acquisition node or relaying by command module and independently downlink network passage receive or transmit the instruction step from monitoring terminal.
6. the means of communication of healthy sensing network as claimed in claim 5, it is characterized in that, the described uplink network passage that passes through carries out data upload process steps and comprises, uplink network passage MAC layer is from LLC layer receiving element data, then carry out medium access rules, check whether uplink network can send; When uplink network can send, it will become mac frame to be sent to physical layer to data encapsulation;
The MAC layer of physiological parameter acquisition node is received after the data that other physiological parameter acquisition node transmits, and by destination address in mac frame, judges, if send to the mistake circuit-switched data of other node, by physical layer, forwards this frame at once; If give own data, the numerical value of the CRC with in bag is checked bag data whether correctly and data deliver to LLC layer; LLC layer provides data link services to application layer.
7. the means of communication of healthy sensing network as claimed in claim 6, it is characterized in that the described downlink network passage that passes through carries out passing process steps under instruction and comprises, downlink network passage adopts host node to transmit the instruction from monitoring terminal to the mode of the next node transmission by RS485 interface and communication protocol; The next node receives orders and directly to subordinate, forwards after frame, judges that whether its command address is identical with this node address, makes response according to command context if identical simultaneously.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106060766A (en) * | 2016-05-26 | 2016-10-26 | 深圳市赛格导航科技股份有限公司 | Device terminal system and information reporting method thereof |
| CN109474566A (en) * | 2017-09-08 | 2019-03-15 | 南京华崴办公设备有限公司 | A kind of self-aided terminal cloud monitoring maintenance system to ensure information security |
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| CN102223273A (en) * | 2011-07-14 | 2011-10-19 | 中山爱科数字科技有限公司 | Digital sensing network and communication method |
| CN202121597U (en) * | 2011-04-14 | 2012-01-18 | 中山爱科数字科技有限公司 | Family health data acquisition apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070027969A1 (en) * | 2005-07-27 | 2007-02-01 | Sharp Kabushiki Kaisha | Sensor device, server node, sensor network system, and method of controlling sensor device |
| CN202121597U (en) * | 2011-04-14 | 2012-01-18 | 中山爱科数字科技有限公司 | Family health data acquisition apparatus |
| CN102223273A (en) * | 2011-07-14 | 2011-10-19 | 中山爱科数字科技有限公司 | Digital sensing network and communication method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106060766A (en) * | 2016-05-26 | 2016-10-26 | 深圳市赛格导航科技股份有限公司 | Device terminal system and information reporting method thereof |
| CN109474566A (en) * | 2017-09-08 | 2019-03-15 | 南京华崴办公设备有限公司 | A kind of self-aided terminal cloud monitoring maintenance system to ensure information security |
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Application publication date: 20140305 |