如何設(shè)計(jì)無(wú)線個(gè)人區(qū)域網(wǎng)絡(luò)用于醫(yī)療和消費(fèi)應(yīng)用

　　超低功耗的2.4 GHz的個(gè)人區(qū)域網(wǎng)絡(luò)應(yīng)用如醫(yī)療、運(yùn)動(dòng)監(jiān)測(cè)擴(kuò)大協(xié)議范圍，從低功耗藍(lán)牙和ZigBee 802.15.4j標(biāo)準(zhǔn)專有協(xié)議如該。本文闡述了如何在藍(lán)牙設(shè)備如劍橋硅無(wú)線和德克薩斯儀器CC2540的csr1000可用于醫(yī)療和消費(fèi)設(shè)計(jì)，以及Atmel的at86rf231實(shí)施和飛思卡爾半導(dǎo)體MC13224為ZigBee和該網(wǎng)絡(luò)。

　　現(xiàn)有的、經(jīng)過(guò)驗(yàn)證的技術(shù)的變化正在出現(xiàn)，以應(yīng)對(duì)醫(yī)療和消費(fèi)者使用的超低功率、短程無(wú)線網(wǎng)絡(luò)的挑戰(zhàn)。成熟的ZigBee 802.15.4標(biāo)準(zhǔn)已被修改以支持在2.35醫(yī)療應(yīng)用的2.40 GHz頻帶，毗鄰現(xiàn)有的2.4 GHz的免執(zhí)照頻段。新的藍(lán)牙低能量協(xié)議的單芯片設(shè)備正在開辟新的機(jī)會(huì)，將醫(yī)療設(shè)備和其他消費(fèi)設(shè)備與移動(dòng)電話相連接，以提供類似的個(gè)人區(qū)域網(wǎng)絡(luò)功能。

　　醫(yī)療體域網(wǎng)（MBAN）是一個(gè)個(gè)人區(qū)域網(wǎng)絡(luò)的關(guān)鍵技術(shù)，并對(duì)ZigBee的物理層和MAC層的802.15.4j修改在2013年2月被批準(zhǔn)。這提供了相同的健壯、低功耗的網(wǎng)狀網(wǎng)絡(luò)協(xié)議，在美國(guó)略有不同的頻率擴(kuò)展，以避免擁擠的無(wú)執(zhí)照頻譜，并提供更多的可靠性和系統(tǒng)的魯棒性，從2013年6月起。

　　Here the design requirements are less about the data rate and more about the power consumption and cost. Being able to implement a PAN （personal area network） or MBAN with devices that can run for weeks， months， or even years from a single-cell battery is a key aim. 802.15.4j allows devices to operate with lower power as re-transmission of packets is reduced and the shorter range means less power is needed for a link. The mesh networks mean that adjacent devices can be used to carry data across the network， further shortening the link distance and reducing the overall power consumption if there are several sensors across the body. These do， however， need a hub device to control access to the network and to collect data to link to the Internet via networks such as Wi-Fi or a cellular phone. However， the existing ZigBee protocol is also highly applicable to these wearable， personal networks with a low-cost， robust approach.