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【你问我答】LTE与802.11N主要区别在哪里？
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时间:
2011-11-16 10:18
作者:
poshuiyue
标题:
【你问我答】LTE与802.11N主要区别在哪里？
LTE与802.11N主要区别在哪里？指的是技术细节上面
时间:
2011-11-22 23:15
作者:
zhilin木木
<font face=\"SimSun\"><span style=\"font-family: 宋体; color: black; font-size: 10pt\" lang=EN-US>802.11N关注</span><span style=\"font-family: 宋体; color: black; font-size: 10pt\">高吞吐量的研究，目标是将<span lang=EN-US>WLAN</span>的传输速率<span lang=EN-US>54Mbps</span>增加至<span lang=EN-US>108Mbps</span>以上，最高速率可达<span lang=EN-US>300Mbps</span>甚至<span lang=EN-US>600Mbps</span>。技术上也采用了MIMO,OFDM等技术,<span style=\"font-family: 宋体; color: black; font-size: 10pt\">工作模式包含<span lang=EN-US>2.4GHz</span>和<span lang=EN-US>5.8GHz</span>两个工作频段，技术上有一些共性.</span></span></font>
<font face=\"SimSun\"><span style=\"font-family: 宋体; color: black; font-size: 10pt\"><span style=\"font-family: 宋体; color: black; font-size: 10pt\"></span></span></font><span style=\"font-family: 宋体; color: black; font-size: 10pt\"><span style=\"font-family: 宋体; color: black; font-size: 10pt\"><font face=\"SimSun\"><b><span style=\"color: black; font-size: 9pt\" lang=EN-US>1</span></b><b><span style=\"font-family: 宋体; color: black; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">、信道绑定</span></b><span style=\"font-size: 9pt\" lang=EN-US><?xml:namespace prefix = o ns = \"urn:schemas-microsoft-com
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<font face=\"SimSun\"><span style=\"font-size: 9pt\" lang=EN-US><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span></span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">传统的</span><span style=\"font-size: 9pt\" lang=EN-US>802.11</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">标准，空口都工作在</span><span style=\"font-size: 9pt\" lang=EN-US>20MHz</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">频宽，</span><span style=\"font-size: 9pt\" lang=EN-US>802.11n</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">技术通过将相邻的两个</span><span style=\"font-size: 9pt\" lang=EN-US>20MHz</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">信道绑定成</span><span style=\"font-size: 9pt\" lang=EN-US>40MHz</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">，使传输速率成倍提高。</span></font><font face=\"SimSun\"><span style=\"font-size: 9pt\" lang=EN-US>LTE</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">中采用</span><span style=\"font-size: 9pt\" lang=EN-US>CA</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">技术。</span></font>
<font face=\"SimSun\"><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\"></span></font><font face=\"SimSun\"><b><span style=\"color: black; font-size: 9pt\" lang=EN-US>2</span></b><b><span style=\"font-family: 宋体; color: black; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">、</span></b><span style=\"font-size: 9pt\" lang=EN-US>Beamforming</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">和空分复用技术</span><span style=\"font-size: 9pt\" lang=EN-US><o:p></o:p></span></font>
<font face=\"SimSun\"><span style=\"font-size: 9pt\" lang=EN-US><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span>LTE</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">也采用这些多天线技术</span></font>
<font face=\"SimSun\"><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\"></span></font><font face=\"SimSun\"><b><span style=\"color: black; font-size: 9pt\" lang=EN-US>3</span></b><b><span style=\"font-family: 宋体; color: black; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">、</span></b><b><span style=\"color: black; font-size: 9pt\" lang=EN-US>MAC </span></b><b><span style=\"font-family: 宋体; color: black; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">增加（</span></b><b><span style=\"color: black; font-size: 9pt\" lang=EN-US>A-MSDU & A-MPDU</span></b><b><span style=\"font-family: 宋体; color: black; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">）</span></b><span style=\"font-size: 9pt\" lang=EN-US><o:p></o:p></span></font>
<font face=\"SimSun\"><span style=\"font-size: 9pt\" lang=EN-US><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span><span style=\"mso-spacerun: yes\"> </span>802.11n</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">引入帧聚合技术，提高了</span><span style=\"font-size: 9pt\" lang=EN-US>MAC</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">层效率。报文聚合技术包括针对</span><span style=\"font-size: 9pt\" lang=EN-US>MSDU</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">的聚合和</span><span style=\"font-size: 9pt\" lang=EN-US>MPDU</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">的聚合，</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">减少了因竞争信道而产生冲突的概率，提高了信道利用率。</span></font><font face=\"SimSun\"><span style=\"font-size: 9pt\" lang=EN-US>LTE</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">系统的</span><span style=\"font-size: 9pt\" lang=EN-US>MAC</span><span style=\"font-family: 宋体; font-size: 9pt; mso-ascii-font-family: \"Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'\">层采用打包分片。</span></font>
</span></span>
时间:
2011-11-24 13:19
作者:
yx4521wdj
标题:
整理贴
802.11N关注高吞吐量的研究，目标是将WLAN的传输速率54Mbps增加至108Mbps以上，最高速率可达300Mbps，甚至600Mbps。技术上也采用了MIMO,OFDM等技术，工作模式包含2.4GHz和5.8GHz两个工作频段，技术上有一些共性 信道绑定传统的802.11标准，空口都工作在20MHz频宽802.11n技术通过将相邻的两个20MHz信道绑定成40MHz，使传输速率成倍提高，LTE中采用CA技术
Beamforming和空分复用技术；
MAC 增加A-MSDU & A-MPDU；
802.11n引入帧聚合技术，提高了MAC层效率。报文聚合技术包括针对MSDU的聚合MPDU的聚合，减少了因竞争信道而产生冲突的概率，提高了信道利用率；
LTE系统的MAC层采用打包分片；
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