CN102685233A - Mobile medical care remote monitoring system and data transmission method thereof - Google Patents

Mobile medical care remote monitoring system and data transmission method thereof Download PDF

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CN102685233A
CN102685233A CN2012101475117A CN201210147511A CN102685233A CN 102685233 A CN102685233 A CN 102685233A CN 2012101475117 A CN2012101475117 A CN 2012101475117A CN 201210147511 A CN201210147511 A CN 201210147511A CN 102685233 A CN102685233 A CN 102685233A
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portable medical
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雷敏
孟光
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Shanghai Jiaotong University
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Abstract

The invention discloses a mobile medical care remote monitoring system and a data transmission method thereof. The mobile medical care remote monitoring system comprises a mobile terminal and a mobile medical care data center system which are in communication connection through a service platform. The data transmission method comprises the following steps of: evaluating physiological status data of the human body, further sending a control instruction of further providing status data to the mobile terminal when the health status of a patient is worsened, and sending a control instruction of reducing status data to the mobile terminal when the health status of the patient gets right; carrying out health evaluation by adopting multiple types of status data; processing multiple types of physiological status data of the human body by adopting a data fusion technology, and mapping the processed physiological status data into new parameters representing the health status of the patient; and smoothening the data by adopting a forgetting factor. According to the mobile medical care remote monitoring system and the data transmission method thereof, the data transmission quantity of the mobile terminal of the patient is self-adaptively adjusted, the processing capacity of the mobile medical care remote monitoring system is improved, the unnecessary mobile communication flow cost is saved and the popularization and generalization of a mobile medicine heath care system are facilitated.

Description

Portable medical health care long distance control system and data transmission method thereof
Technical field
The present invention relates to a kind of telehealth system, specifically is a kind of portable medical health care long distance control system and data transmission method thereof.
Background technology
The telehealth system is that a kind of communication technology of utilizing is transmitted human body physiological state information, monitors human health status in real time by long-range portable medical data center systems, thereby for the patient system of telehealth service is provided.Continuous development along with the communication technology; The telehealth system is also constantly ripe and perfect; For example; Telehealth combines with GSM, can utilize mobile communication terminal easily Monitoring Data to be sent to the portable medical data center systems, and this portable medical pattern is accepted by more and more many general patients.
Present common telehealth system is in the portable medical health care long distance control system of mobile radio networks as the bottom transmission technology; According to monitored patient's different disease hidden danger, need the human body physiological state data of monitoring may comprise glucose level information, blood pressure information, cholesterol levels information, respiration information, pulse information, ECG information, one or more the combination in wound malleation, body temperature information, SpO2/Pleth grade, carbon dioxide grade or the like is arranged.These transfer of data to long-range computer that focuses on or server, are carried out automatic data analysis by expert system or offer the medical personnel that to carry out that manual analysis handles be common way then.Yet; Lot of data is transmitted through moving wireless moving communication network; Increased the data traffic burden of mobile communications network on the one hand; Particularly radio spectrum resources normally restricts one of bottleneck of mobile communication business development; Mobile communication carrier or data service provider can move heaven and earth increases the charging of data flow income, and this makes recipient and the supplier of portable medical service this reason of all will having to be considered to, thereby influences the popularization that portable medical is served.On the other hand; Monitored patient's self human body physiological state data always do not reflect yet and are in disease or certain burst symptom; And need accept the expert system at remote healthcare center or medical personnel's further diagnostic analysis, also be that quite a lot of human body physiological state data of being gathered show that all the patient is in normal condition.Data message need be transferred to the medical treatment & health health center as server through mobile communications network, and portable medical service provider or needs of patients are to mobile communication network operator or provide service provider's payment data traffic fee of data transport service to use.In the data message that portable medical health care long distance control system collects simultaneously; Also there is a large amount of redundant datas; When medical treatment & health health center long distance control system need be monitored a large amount of patients, can impact especially, be unfavorable for popularizing of large-scale portable medical health care system its handling property.
Summary of the invention
The present invention is directed to the above-mentioned deficiency that exists in the prior art, a kind of portable medical health care long distance control system and data transmission method thereof are provided.
The present invention realizes through following technical scheme.
A kind of portable medical health care long distance control system comprises portable terminal and portable medical data center systems, and said portable terminal communicates through business platform with the portable medical data center systems and is connected.
The interconnective sensor interface module of said portable terminal, control module, application module and communication module, wherein:
-sensor interface module is used for responsible communicating with various biosensors and is connected, and collects the data that biosensor collects;
-control module is used for being responsible for the information exchange of control and various biosensors;
-application module is used for being responsible for resolving with the signaling of remote data center, adaptive;
-communication module is used for being responsible for and the communicating by letter of mobile radio networks.
The interface shape of said sensor interface module comprises: directly cable connects with USB, USB interface transmitting digital information or with the wireless body area network WBAN that the Zigbee short-range wireless communication technology of the bluetooth of 802.15.1 standard and 802.15.4 standard is the basis and carries out the digital data transmission with various biosensors.
Said portable medical data center systems comprises interconnective interface module, memory module, analysis module, control module and display module, wherein:
-interface module is used for being responsible for through realization portable medical data center systems and the communications of Mobile Terminals of being connected with business platform;
-memory module is used for being responsible for the human body physiological state information of buffer memory portable terminal, and stores by specific form, extracts the characteristic parameter of disease or abnormal physiology state through the data mining means, and through combining to confirm its validity with clinical;
-analysis module is used for being responsible for analyzing to the human body physiological state information that receives and store, and compares with historical accumulation data;
-control module produces the control information to portable terminal according to the analysis result of analysis module, is used to adjust cycle, information type and the combination that human body physiological state information is sent;
-display module is used for when medical personnel's manual work is checked or analyzed portable medical service acceptor's data, the Presentation Function of figure, historical data curve being provided.
A kind of data transmission method that utilizes portable medical health care long distance control system may further comprise the steps:
Step 1, portable terminal are collected the data that the human body biosensor detects, and after according to pre-configured strategy or rule one or more human body physiological state data being handled, send to the portable medical data center systems with the data format that defines in advance;
Step 2, the portable medical data center systems is handled the data that receive after receiving the human body physiological state data of step 1, and provides assessment result;
Step 3, portable medical data center systems are according to the assessment result that obtains in the step 2, and trigger control module generates control command and returns to portable terminal.
The data receiver formula of said step 1 comprises: through being provided with in advance one carries out with portable medical data center systems directory numbers associated that short message mode sends or is connected and sends through setting up a data business.
The said mode of setting up professional connection of data and sending does; An Internet protocol (IP) address is set carries out; Portable terminal is normally initiated a uplink random access request and is connected with the signaling that air interface is set up in the mobile communication base station; After signaling connects foundation, further set up data service and connect, connect to send the data to through these data then and move the portable medical data center systems.
The data processing of said step 2 comprises following steps:
The first step adopts two groups of threshold parameter values, and said first group of threshold parameter value is used to assess pairing physiologic information and whether surpasses alarming threshold, and said second group of threshold parameter value is used to assess pairing physiologic information and whether is lower than alarming threshold;
Second step, select as most important a kind of physiological status data respectively with the first step in two groups of threshold parameter values compare and provide assessment result.
In the said first step in two groups of threshold parameter values every group comprise a threshold value at least, and first group of threshold parameter value is greater than second group of difference that the threshold parameter value is certain.
Most important a kind of physiological status data comprise in said second step: to polytype human body physiological state data is a kind of parameter of new sign patient health state through a function f (X) mapping treatment; Wherein X is a vector, representes polytype original human body physiological state data; Or, adopt other smoothing processing mode to combine the historical record data of human body physiological state data to carry out certain weighting smoothing processing.
Said weighting smoothing processing formula does,
Figure BDA00001629055300031
Wherein, x nBe these data that receive,
Figure BDA00001629055300032
Be the data after the last smoothing processing, α is a forgetting factor.
The present invention can regulate the volume of transmitted data of patient's portable terminal adaptively, improves the disposal ability of portable medical health care long distance control system, saves unnecessary movement communication flows expense, helps the penetration and promotion of portable medical health care system.
Description of drawings
Fig. 1 uses mobile communications network for tradition the system schematic of telehealth service is provided;
Fig. 2 is a portable medical data center systems flow chart of data processing of the present invention;
Fig. 3 is portable medical of the present invention data center structural representation;
Fig. 4 has the mobile terminal structure sketch map of portable medical function for the present invention.
Embodiment
Elaborate in the face of embodiments of the invention down: present embodiment provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Embodiment 1
Present embodiment comprises portable terminal and portable medical data center systems, and said portable terminal communicates through business platform with the portable medical data center systems and is connected.
The interconnective sensor interface module of said portable terminal, control module, application module and communication module, wherein:
-sensor interface module is used for responsible communicating with various biosensors and is connected, and collects the data that biosensor collects;
-control module is used for being responsible for the information exchange of control and various biosensors;
-application module is used for being responsible for resolving with the signaling of remote data center, adaptive;
-communication module is used for being responsible for and the communicating by letter of mobile radio networks.
The interface shape of said sensor interface module comprises: directly cable connects with USB, USB interface transmitting digital information or with the wireless body area network WBAN that the Zigbee short-range wireless communication technology of the bluetooth of 802.15.1 standard and 802.15.4 standard is the basis and carries out the digital data transmission with various biosensors.
Said portable medical data center systems comprises interconnective interface module, memory module, analysis module, control module and display module, wherein:
-interface module is used for being responsible for through realization portable medical data center systems and the communications of Mobile Terminals of being connected with business platform;
-memory module is used for being responsible for the human body physiological state information of buffer memory portable terminal, and stores by specific form, extracts the characteristic parameter of disease or abnormal physiology state through the data mining means, and through combining to confirm its validity with clinical;
-analysis module is used for being responsible for analyzing to the human body physiological state information that receives and store, and compares with historical accumulation data;
-control module produces the control information to portable terminal according to the analysis result of analysis module, is used to adjust cycle, information type and the combination that human body physiological state information is sent;
-display module is used for when medical personnel's manual work is checked or analyzed portable medical service acceptor's data, the Presentation Function of figure, historical data curve being provided.
Embodiment 2
Present embodiment is the data transmission method that utilizes the portable medical health care long distance control system that embodiment 1 provides.
Present embodiment may further comprise the steps:
Step 1, portable terminal are collected the data that the human body biosensor detects, and after according to pre-configured strategy or rule one or more human body physiological state data being handled, send to the portable medical data center systems with the data format that defines in advance;
Step 2, the portable medical data center systems is handled the data that receive after receiving the human body physiological state data of step 1, and provides assessment result;
Step 3, portable medical data center systems are according to the assessment result that obtains in the step 2, and trigger control module generates control command and returns to portable terminal.
The data receiver formula of said step 1 comprises: through being provided with in advance one carries out with portable medical data center systems directory numbers associated that short message mode sends or is connected and sends through setting up a data business.
The said mode of setting up professional connection of data and sending does; An Internet protocol (IP) address is set carries out; Portable terminal is normally initiated a uplink random access request and is connected with the signaling that air interface is set up in the mobile communication base station; After signaling connects foundation, further set up data service and connect, connect to send the data to through these data then and move the portable medical data center systems.
The data processing of said step 2 comprises following steps:
The first step adopts two groups of threshold parameter values, and said first group of threshold parameter value is used to assess pairing physiologic information and whether surpasses alarming threshold, and said second group of threshold parameter value is used to assess pairing physiologic information and whether is lower than alarming threshold;
Second step, select as most important a kind of physiological status data respectively with the first step in two groups of threshold parameter values compare and provide assessment result.
In the said first step in two groups of threshold parameter values every group comprise a threshold value at least, and first group of threshold parameter value is greater than second group of difference that the threshold parameter value is certain.
Most important a kind of physiological status data comprise in said second step: to polytype human body physiological state data is a kind of parameter of new sign patient health state through a function f (X) mapping treatment; Wherein X is a vector, representes polytype original human body physiological state data; Or, adopt other smoothing processing mode to combine the historical record data of human body physiological state data to carry out certain weighting smoothing processing.
Said weighting smoothing processing formula does,
Figure BDA00001629055300061
Wherein, x nBe these data that receive,
Figure BDA00001629055300062
Be the data after the last smoothing processing, α is a forgetting factor.
Be specially,
At first portable terminal is collected the data that the human body biosensor detects, and according to pre-configured strategy or rule to 1 or after the data of multiple human body biosensor handle, send to the portable medical data center systems with the data format that defines in advance.The transmission of data can be taked the mode of short message, carries out through a computer server directory numbers associated with the portable medical data center systems that is provided with in advance.The transmission of data also can be employed in sets up between the computer server of portable terminal and portable medical data center systems that data are professional to be connected and carry out; The computer server of this moment can be visited through mobile communications network; An Internet protocol (IP) address for example is set carries out; Portable terminal is normally initiated a uplink random access request and is connected with the signaling that air interface is set up in the mobile communication base station; After signaling connects foundation, further set up data service and connect, connect to send the data to through these data then and move the portable medical data center systems.
The portable medical data center systems is handled the data that receive after the human body physiological state data of the one or more types that receive the patient.When data are handled; Adopt two groups of threshold parameter values; Wherein one group of threshold parameter value is used to assess pairing physiologic information and whether surpasses alarming threshold or early warning thresholding; Be designated as (A1, A2, A3 ...), another group threshold parameter value is used to assess pairing physiologic information and whether is lower than alarming threshold or early warning thresholding, be designated as (B1, B2, B3 ...).At least comprise a threshold value in two groups of threshold parameter values respectively; Be used for most important a kind of physiological status data are assessed; Like A1 and B1, A1 and B1 can equate, but generally A1 greater than the certain difference of B1; Its objective is in order to make assessment result guarantee certain stability, avoid taking place continually saltus step as a result.And the like, A2 and B2 are used for inferior important a kind of physiological status data are carried out, or the like.In addition, the different threshold value also can be used for to assess the degree that its result's representative surpasses alarm or is lower than alarm with a kind of physiological status data.Described threshold parameter value also can be to the human body physiological state data of having carried out Data Fusion; Through a function f (X) mapping treatment a kind of parameter of new sign patient health state for example to polytype human body physiological state data; Wherein X is a vector, representes polytype original human body physiological state data.Certainly, directly single original human body physiological state data are handled a kind of specific type that also can be regarded as mapping function f (X), promptly do not carry out data fusion.Be selected as the most important a kind of physiological status data or the human body physiological state data of having carried out Data Fusion and compare with threshold value A1 and B1 respectively; So that confirm the health status of this patient through the data representative of portable terminal transmission; For example represent that greater than A1 the patient has got into the alarm status that health status worsens, and represent that less than B1 the patient has returned to the normal health state.In addition, also can combine the historical record data of human body physiological state data to carry out certain weighting smoothing processing, for example, adopt formula
Figure BDA00001629055300071
To this data x that receives nHandle, wherein
Figure BDA00001629055300072
Be the data after the last smoothing processing, α is called forgetting factor.Certainly, also can adopt other smoothing processing mode.Similarly, can select time important another kind of physiological status data to compare with threshold value A2 and B2 respectively, result relatively can combine with aforesaid health status assessment result so that draw the more health status assessment result of criterion.Depend on patient's concrete pathology characteristic etc., health status can be characterized by assessment results a kind of or several human body physiological state data.
After assessment result was determined, medical treatment & health health center will trigger the operation to patient's human body side apparatus of portable medical health care system.When assessment result is the health status deterioration; Medical treatment & health health center will produce and require the human body side apparatus that the order of human body physiological state data further is provided, for example be do not change the more eurypalynous human body physiological state data of monitoring reported data during the cycle, be to increase the frequency of reported data or both increased the frequency that more eurypalynous human body physiological state data also increase reported data under the constant situation of monitored human body physiological state data type keeping.In some Health Care Services type; For example to the blood sugar patient; Monitoring blood glucose target when too high, the portable medical data center systems also may produce a control command, and the insulin pump of control human body side apparatus discharges the doses pancreas islet and usually the patient given treatment to timely.When assessment result is when recovering the normal health state; The portable medical data center systems will produce and require the human body side apparatus to reduce the order of human body physiological state data is provided, and for example is the human body physiological state data that do not change minimizing some the non-important kind of monitoring reported data during the cycle, is the frequency that also reduces reported data in the human body physiological state data that keep reducing the frequency of reported data under the constant situation of monitored human body physiological state data type or both reduced some non-important kind.
The operation on people side in the medical health system is mainly sent to portable terminal with predefined form through mobile communications network with the control command that produces to be carried out.For example can adopt the short message transmission of initiating by network side that control command is sent to portable terminal, also can control command be sent to portable terminal through the data service connection of setting up.In certain embodiments; Also can the human body physiological state data that monitor be analyzed by the medical personnel of medical treatment & health health center, and after analysis, provide more flexibly and meet in advance definition format and can for the mode that portable terminal can be resolved definite in control command.Portable terminal is after receiving and parsing control command; Will adjust the local policy of portable terminal; Comprise the activation of human body physiological state information sensor or deactivate; The control sensor acquisition to the human body physiological state data be delivered to portable terminal through interface function, or carry out certain preliminary treatment etc.Portable terminal can will report the portable medical data center systems or report the portable medical data center systems according to the preset time rule at once by the control command requirement.
Portable terminal and tele-medicine health care center are after having carried out data mutual; If there is not further transfer of data demand; Will after identifying this situation, discharge the data service of being set up by the inner function of mobile communications network and connect, at this moment portable terminal can get into the low-power consumption wait state.
Provided tele-medicine health care centre data handling process of the present invention like Fig. 2; Consistent with above-mentioned description; Wherein, when judging the health status that this secondary data reflected, health status worsens and health status is recovered the two states except occurring with the threshold value comparison; Also comprise the constant this situation of state, the portable medical data center systems will be made the order of maintaining the statusquo and not dealing with this moment.This order can send to portable terminal, also can not send to portable terminal.
The structural representation that further provides portable medical health care center as shown in Figure 3 comprises interface module, memory module, analysis module, control module and display module.Wherein interface module is responsible for realizing health center and communications of Mobile Terminals through being connected with business platform, comprises that the control information that sends to portable terminal with health center is obtained in the reception of the human body physiological state information data of originating mobile terminal.Memory module is responsible for the human body physiological state information of buffer memory portable terminal; And store by specific form; After same patient's historical data and different patients' historical data are collected; Can further adopt the data mining means to extract the characteristic parameter of disease or abnormal physiology state, and through combining to confirm its validity with clinical.Analysis module is responsible for analyzing to the human body physiological state information that receives and store; And compare with historical accumulation data; For example can adopt an assessment algorithm that at least a physiological state information and specific threshold value are compared; For example blood sugar level and predetermined blood sugar level thresholding are compared, determine whether to occur unusually and whether be stable at a normal level.In addition, the processing of data can comprise on average, filter and other similar algorithms.Analysis module also can adopt expert system to realize, so as can will to have the medical personnel's of higher level experience let more portable medical service acceptor enjoy and needn't bear high field diagnostic and health care consultation expense.In addition, to the collection of historical data, help the medical personnel works out better disease or unusual condition through analysis assessment algorithm.Control module produces the control information to the far-end portable terminal according to the analysis result of analysis module, is used to adjust cycle, information type and the combination etc. that human body physiological state information is sent.Display module then is used for when medical personnel's manual work is checked or analyzed portable medical service acceptor's data, the Presentation Function of figure, historical data curve etc. being provided.
As shown in Figure 4 is the structural representation with portable terminal of portable medical health care of the present invention, comprises sensor interface module, control module, application module, communication module.Wherein, Responsible the communicating with various biosensors of sensor interface module is connected; Collect the data that biosensor collects; Its interface shape can adopt direct cable to connect with USB, USB interface transmitting digital information, and the wireless body area network WBAN that also can adopt the Zigbee short-range wireless communication technology of bluetooth (Bluetooth) with the 802.15.1 standard, 802.15.4 standard to be the basis carries out the digital data transmission with various biosensors.Control module is responsible for controlling the information exchange with various biosensors, like transmission of the operating state activation of biosensor and setting, control command etc.Application module is responsible for resolving with the signaling of remote data center, adaptive etc.Communication module is responsible for and the communicating by letter of mobile radio networks, and it has common mobile phone or terminal basic functions.
The foregoing description can be regulated the volume of transmitted data of patient's portable terminal adaptively; Improve the disposal ability of portable medical health care long distance control system; Save unnecessary movement communication flows expense, help the penetration and promotion of portable medical health care system.

Claims (9)

1. portable medical health care long distance control system; Comprise portable terminal and portable medical data center systems; Said portable terminal communicates through business platform with the portable medical data center systems and is connected; It is characterized in that, the interconnective sensor interface module of said portable terminal, control module, application module and communication module, wherein:
-sensor interface module is used for responsible communicating with various biosensors and is connected, and collects the data that biosensor collects;
-control module is used for being responsible for the information exchange of control and various biosensors;
-application module is used for being responsible for resolving with the signaling of remote data center, adaptive;
-communication module is used for being responsible for and the communicating by letter of mobile radio networks;
Said portable medical data center systems comprises interconnective interface module, memory module, analysis module, control module and display module, wherein:
-interface module is used for being responsible for through realization portable medical data center systems and the communications of Mobile Terminals of being connected with business platform;
-memory module is used for being responsible for the human body physiological state information of buffer memory portable terminal, and stores by specific form, extracts the characteristic parameter of disease or abnormal physiology state through the data mining means, and through combining to confirm its validity with clinical;
-analysis module is used for being responsible for analyzing to the human body physiological state information that receives and store, and compares with historical accumulation data;
-control module produces the control information to portable terminal according to the analysis result of analysis module, is used to adjust cycle, information type and the combination that human body physiological state information is sent;
-display module is used for when medical personnel's manual work is checked or analyzed portable medical service acceptor's data, the Presentation Function of figure, historical data curve being provided.
2. portable medical health care long distance control system according to claim 1, it is characterized in that the interface shape of said sensor interface module comprises: directly cable connects with USB, USB interface transmitting digital information; Or the wireless body area network WBAN that is the basis with the Zigbee short-range wireless communication technology of the bluetooth of 802.15.1 standard and 802.15.4 standard carries out the digital data transmission with various biosensors.
3. a data transmission method that utilizes portable medical health care long distance control system as claimed in claim 1 is characterized in that, comprises the steps:
Step 1, portable terminal are collected the data that the human body biosensor detects, and after according to pre-configured strategy or rule one or more human body physiological state data being handled, send to the portable medical data center systems with the data format that defines in advance;
Step 2, the portable medical data center systems is handled the data that receive after receiving the human body physiological state data of step 1, and provides assessment result;
Step 3, portable medical data center systems are according to the assessment result that obtains in the step 2, and trigger control module generates control command and returns to portable terminal.
4. the data transmission method of portable medical health care long distance control system according to claim 3; It is characterized in that the data receiver formula of said step 1 comprises: through being provided with in advance one carries out with portable medical data center systems directory numbers associated that short message mode sends or is connected and sends through setting up a data business.
5. the data transmission method of portable medical health care long distance control system according to claim 4; It is characterized in that; The said mode of setting up professional connection of data and sending does; An Internet protocol (IP) address is set carries out; Portable terminal is normally initiated a uplink random access request and is connected with the signaling that air interface is set up in the mobile communication base station, after signaling connects foundation, further sets up data service and connects, and sends the data to through this data connection then and moves the portable medical data center systems.
6. the data transmission method of portable medical health care long distance control system according to claim 3 is characterized in that the data processing of said step 2 comprises following steps:
The first step adopts two groups of threshold parameter values, and said first group of threshold parameter value is used to assess pairing physiologic information and whether surpasses alarming threshold, and said second group of threshold parameter value is used to assess pairing physiologic information and whether is lower than alarming threshold;
Second step, select as most important a kind of physiological status data respectively with the first step in two groups of threshold parameter values compare and provide assessment result.
7. the data transmission method of portable medical health care long distance control system according to claim 6; It is characterized in that; In the said first step in two groups of threshold parameter values every group comprise a threshold value at least, and first group of threshold parameter value is greater than second group of difference that the threshold parameter value is certain.
8. the data transmission method of portable medical health care long distance control system according to claim 6; It is characterized in that; Most important a kind of physiological status data comprise in said second step: to polytype human body physiological state data is a kind of parameter of new sign patient health state through a function f (X) mapping treatment; Wherein X is a vector, representes polytype original human body physiological state data; Or, adopt other smoothing processing mode to combine the historical record data of human body physiological state data to carry out certain weighting smoothing processing.
9. the data transmission method of portable medical according to claim 8 health care long distance control system is characterized in that, said weighting smoothing processing formula does,
Figure FDA00001629055200021
Wherein, x nBe these data that receive, Be the data after the last smoothing processing, α is a forgetting factor.
CN2012101475117A 2012-05-11 2012-05-11 Mobile medical care remote monitoring system and data transmission method thereof Pending CN102685233A (en)

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Application publication date: 20120919