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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=87861&size=small" /></div> <h1 class="ph">蓝牙3.0标准公开，加入无线LAN功能 </h1> <p class="xg1"> 时间：2009-4-27 09:05<a class="zz" href="home.php?mod=space&uid=87861">作者：信息发布员</a> 阅读<em id="_viewnum">(1324)</em> 评论: 0</p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>近距离无线规格蓝牙的标准化团体Bluetooth Special Interest Group（SIG）于美国时间2009年4月21日公布了“蓝牙3.0（Bluetooth 3.0）”标准（英文发布资料）。利用无线LAN的MAC层及物理层，可实现最大24Mbit/秒的数据 ...</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><P>近距离无线规格蓝牙的标准化团体Bluetooth Special Interest Group（SIG）于美国时间2009年4月21日公布了“蓝牙3.0（Bluetooth 3.0）”标准（英文发布<a href="http://theory.oecr.com" target="_blank" class="relatedlink">资料</a>）。利用无线LAN的MAC层及<a href="http://theory.oecr.com" target="_blank" class="relatedlink">物理</a>层，可实现最大24Mbit/秒的数据传输速度。美国博通（Broadcom）发布了同标准的无线IC。英国英桥无线<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>（CSR plc）等表示，博通的<a href="http://b.oecr.com/sell" target="_blank" class="relatedlink">产品</a>已确认符合蓝牙3.0标准。 </P> <P>蓝牙3.0的正式名称为“Bluetooth Core Specification Version 3.0＋High Speed”。作为蓝牙标准，其新意在于追加了在需要进行高速数据传输时，可采用现有的其他无线规格的MAC层及物理层的“Generic Alternate MAC/PHY（AMP）”及可实时优化电波输出的“Enhanced Power Control”功能等。 </P> <P>其中，AMP除了蓝牙现有标准之外，还在蓝牙HCI（主机控制器接口）层下面追加了新的MAC层及物理层。只是，AMP定位于“二级无线”。“初级无线（Primary Radio）”是指蓝牙现有<a href="http://ofc.oecr.com" target="_blank" class="relatedlink">通信</a>标准“蓝牙2.0＋EDR”，设想在利用初级无线的过程中，用于根据需要切换为二级无线。无线切换由在HCI层上控制通信通道逻辑连接的“L2CAP（逻辑链路控制及适配协议）”层操控。 </P> <P>切换后作为无线LAN终端通信 </P> <P>对AMP上的无线还计划采用UWB（超宽带）无线规格等，但此次的标准已固定为采用基于IEEE802.11规格的无线LAN。即在HCI层下面追加了“802.11 Protocol Adaption Layer（802.11 PAL）”层。MAC层与物理层沿用了IEEE802.11规格标准。 </P> <P>采用新标准的蓝牙终端一旦将无线标准转为无线LAN标准，该终端便会具有包括接入点访问控制在内的无线LAN网络的功能。 </P> <P>开发蓝牙收发IC等的各厂商目前已开始安装蓝牙3.0。具体如，博通在09年1月的“2009 International CES”上公开了采用无线LAN的AMP。 </P> <P>另外，英桥无线电子还宣布过，其09年2月发布的可根据具体应用从多个无线规格中选用最佳规格的架构“Synergy wireless systems”作为首款基于蓝牙3.0的产品获得了认证。Synergy本身除了蓝牙及无线LAN之外，还支持GPS、FM、UWB及NFC等无线标准。</P></td></tr></table> <!--[diy=diycontentbottom]--><div id="diycontentbottom" class="area"></div><!--[/diy]--> <script src="data/cache/home.js?eOg" type="text/javascript"></script> <div id="click_div"><table 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