【正文】 An offline node can connect to a work in about 30 ms .Waking up a sleeping node takes about 15 ms, as does accessing a channel andtransmitting data. If the requirement is to collect data once a minute the device can be placed in a power saving mode saving significant amounts of energy and increasing the battery life. In sleep mode a Zigbee chip can assume as little as [12]. This is particularly important in a medical setting where patients are often on the move while still attached to medical devices. Coexistence Both Zigbee and operate in the licensefree industrial scientific medical (ISM) frequency is already in widespread use within hospitals which would encourage the adoption of Zigbee solutions in the same environment. However care has to be taken to avoid interference between these 2 neighbouring technologies as described in the paper entitled “Coexistance of with other systems in the ” [13]. By selecting an appropriate channel, after performing a simple site survey, these problems can be easily avoided. Device Parameters Typical readings available on a ventilator are Inspiratory Tidal Volume, Expiratory Tidal Volume, O2 concentration, Respiratory Rate, Peak Pressure, Expired Minute Volume and Mean Airway Pressure. The settings on the ventilator are also of interest to medical staff. The most typical settings we’ve chosen are Inspiratory Tidal Volume, Minute Volume, O2 Concentration, I:E Ratio, Breath Duration and Inspiratory Flow. Similarly we have chosen some mon parameters for Vital Signs Monitors. These are Respiratory Rate, Non Invasive Blood Pressure, SPO2 and Temperature. The third device we selected parameters for is the Unfusion Pump. The mon parameters we are most interested in here are Volume, Time, Ramp and Occlusion Pressure. Further parameters can be easily added to the system in the future. Bandwidth For development purposes we analysis a Maquet ServoI [14] which supports all the ventilator parameters described above. This ventilator works in a mand response manner. When initial configuration has taken place 2 mands which are 7 bytes long each will produce 2 responses of 67 bytes each. Therefore even in a multi hop mesh work it is anticipated we would be able to support several of these devices plus other types of devices on the same channel. Scalability The ventilator, having the most parameters of the devices studied, requires the most bandwidth. Experiments carried out on a CSI Vital Signs Monitor [15] show that 44 bytes of data will produce all the information we are interested in. A Braun Infusion Pump [16] exports 24 bytes of data to produce the 4 parameters we need. For any of the medical devices we are concerned with, the readings are typically only required once a minute in a hospital environment. All these devices have their own alarm mechanisms built in。為了達(dá)到這樣的目的，硬件設(shè)計(jì)被保持原樣，軟件設(shè)計(jì)對(duì)于不同形式的醫(yī)療設(shè)備的代碼被很好的重新定義。通過(guò)使用設(shè)備的部分無(wú)線電傳感器網(wǎng)絡(luò)，例如“紫蜂”技術(shù)網(wǎng)絡(luò)技術(shù)，可以包含更多的優(yōu)點(diǎn)：電纜更換，移動(dòng)性和位置管理。 一、 相關(guān)工作 使用無(wú)線傳感器網(wǎng)絡(luò)的醫(yī)療服務(wù)和無(wú)線病人監(jiān)測(cè)的觀念一直被別人探索著，但是將數(shù)據(jù)從其他裝置進(jìn)行整合通常不被討論。 ZigBee 提供低成本，低功率的設(shè)備，可以互相交流和外面的世界。在睡眠模式的 ZigBee 芯片可以承擔(dān)少 [ 12 ] 。同樣，我們選擇了一些常見(jiàn)的參數(shù)，生命體征監(jiān)測(cè)器。因此，即使是在一個(gè)多跳網(wǎng)狀網(wǎng)，我們預(yù)期將能夠支持一些這類(lèi)設(shè)備加上其他類(lèi)型的設(shè)備工作在同一 頻段。我們捕捉的頻率數(shù)據(jù)被臨床工作人員本身所決定。用戶可以然后準(zhǔn)這個(gè)裝置與病人使用一個(gè) GUI 客戶端。這是我們使用的為這一項(xiàng)目設(shè)計(jì)的協(xié)議。有一個(gè) DLL 為每一類(lèi)醫(yī)療設(shè)備系統(tǒng)支持允許今后的醫(yī)療設(shè)備以被沒(méi)有升級(jí)的服務(wù)器軟件支持。當(dāng)這個(gè)計(jì)時(shí)器終止 DLL 將檢查的現(xiàn)狀已經(jīng)為呼吸機(jī)。一旦數(shù)據(jù)被證明是有效的，通用的被共享在服務(wù)器應(yīng)用和客戶之間的數(shù)據(jù)結(jié)構(gòu)被填充。然后通過(guò)定時(shí)地發(fā)送 RADAB 和 RADAS 命令我們可以捕捉最新的 信息從呼吸器。此外，我們進(jìn)行了一些流動(dòng)性測(cè)試移動(dòng)的 MDI 在操作過(guò)程中沒(méi)有造成任何包的丟失。 。 五、 結(jié)論 在本文中，我們已經(jīng)表明無(wú)線傳感器網(wǎng)絡(luò)是一個(gè)合適的從醫(yī)療設(shè)備中獲取數(shù)據(jù)的手段。在我們的實(shí)驗(yàn)中，我們成功地檢索呼吸機(jī)的數(shù)據(jù)在 5 秒的間隔。然后服務(wù)器組播新的數(shù)據(jù)對(duì)任何被認(rèn)購(gòu)到該地址的客戶端。當(dāng)計(jì)時(shí)器終止 DLL 的檢索命令的一個(gè)字節(jié)數(shù)組的 ASCII 字符的形式。這些 DLL 被加載在運(yùn)行時(shí)而且有一個(gè)每個(gè)設(shè)計(jì)師必須堅(jiān)持的標(biāo)準(zhǔn)接口，為了和系統(tǒng)互操作。在這一點(diǎn)上和 MDI 做一個(gè)結(jié)合是可能的。收到的數(shù)據(jù)通過(guò)服務(wù)器為病人將被儲(chǔ)存在電子醫(yī)療記錄（ EHR）并顯示在被預(yù)定的任何 GUI 客戶端。 三 、 系統(tǒng)架構(gòu) 整個(gè)系統(tǒng)的體系結(jié)構(gòu)由一個(gè)無(wú)線個(gè)人網(wǎng)（ WPAN）和局域網(wǎng)組成。實(shí)驗(yàn)進(jìn)行在CSI 的生命體征監(jiān)測(cè) [ 15 ]表明， 44 字節(jié)數(shù)據(jù)將產(chǎn)生的所有我們感興趣的信息。第三個(gè)器件參數(shù)，我們選擇的是傳感頻率泵。 C 角共存 ZigBee 和 工作在免許可證的工業(yè)科學(xué)醫(yī)療協(xié)會(huì)（ ISM ）的 頻率頻段 . 已經(jīng)廣泛使用在醫(yī)院，醫(yī)院將鼓勵(lì)通過(guò) ZigBee 解決方案促使在同一個(gè)環(huán)境中使用。這是在特別有用的在醫(yī)院的墻壁干擾，和一般人的阻礙下，是一個(gè)重要問(wèn)題。其他人同樣也成功地使用無(wú)線傳感器網(wǎng)絡(luò)設(shè)計(jì)的醫(yī)療傳感器 [ 4 ]和管理中的傳感器數(shù)據(jù) [ 5 ] 。 為了獲得這種類(lèi)型的解決方案，每種設(shè)備必須被匹配到一塊硬件中，做為一個(gè)串行的無(wú)限網(wǎng)橋即醫(yī)療設(shè)備接口。 當(dāng)前在醫(yī)院的病房里，重癥監(jiān)護(hù)病房，或者其他的臨床設(shè)置于病床邊的醫(yī)療設(shè)備都有數(shù)據(jù)輸出功能的串行端口和其他類(lèi)型的接口，如 USB接口。 the main server application decodes this