企业级802.11ac WLAN接入点：市场趋势、架构选择及CPU选择标准

问：1.是否可快速应用？2.反应速度、精度、稳定性、可靠性及效率和能耗？3.应用成本，供货延续性？
答：1) we have close to turnkey ready demo package for customer evaluation. 2) The demo has been testing by many customers since last year. It is nothing new to the market. 3) all of our products has an at least 10-year long term support. We are will to discuss with you in business term. Please contact our Local marketing Kenny Liu, 861058798040

问：有哪些优势?
答：Thank you for the question. In general, QorIQ family has a much better processing power and much lower power consumption. We are willing to discuss with you in more detail. Please contact our Local marketing Kenny Liu, 861058798040

问：企业级的WLAN接入点符合工业级标准码？
答：QorIQ P1 系列均支持工業規格 extended temperature support

问：你说到11ac不支持Multi-user模式，在多用户连接的情况下，total速率是递减的，是怎样递减的？
答：Thank you for the question. suggest to seek WLAN vender support for this question. WLAN venders like Atheros/Broadcom will have better analysis on this...

问：1:企业级802.11ac WLAN接入点和以往的802.11有什么不同？ 2：企业级802.11ac WLAN接入点MCU需要支持哪些协议和哪些接口？
答：1) 11ac 支持更高的硬體帶寬2) PCIe and GMAC and securityCAPWAP protocol

问：请问：802.11n   802.11a   802.11b   有什么根本性的区别？
答：802.11aModulation Scheme OFDM Data Rate 6,9,12,18,24,36,48,54 Mbps RF Carrier 5GHzBandwidth 20MHzDistance covered(appox.)- 35m(indoor),120m(outdoor) 802.11bModulation scheme DSSS/CCKData rate 1,2,5.5 and 11 MbpsRF Carrier 2.4GhzDistance covered(appox.)- 38m(indoor),140m(outdoor) 802.11nModulation Scheme OFDM and DSSS/CCKIt supports legacy fallbacks of 11a/11b/11g systemsBandwidth 20MHz and 40MHzData rate -As per 11a/11b/11g.-It supports upto about 72Mbps for 20MHz bandwidth with multiple antennas-It supports upto about 150Mbps for 40MHz bandwidth with multiple antennasDistance covered(appox.)- (indoor),250m(outdoor)MIMO configuration -Most of the devices uses 2T3R(2 antennas in transmit and 3 antennas in receive),Maximum configuration goes upto 4T4R.

问：1）此系列的CPU，在针对无线业务上硬件有何特点，能满足高性能的需求？ 2）软件优化方面，frescale做了什么工作？ 3）针对于linux操作系统，这些特性是否已经正常工作？ 4）企业级产品，射频指标的要求会有所增加，freescale方面是否有投入研发，还是纯粹依赖于无线模块提供商的能力？ 5）之前的一段时间，freescale的linux SDK不太友好，
答：1. 低功耗, CPU Dhrystone MIPS 高. 2. Networking data path optimization(ASF) 优化 3. 在展示機上, Linux 已完全正常工作.4. 在無線射頻方面, 必需尋求无线模块提供商的協助5. Freescale SDK v1.3有很多的改進.

问：wlan最大可以达到多大的通信速率？
答：目前P1020-800Mhz平台可達道近1100Mbps 11ac+11n TCP throughput

问：探讨的问题有深度、广度并非常有新意，值得参加和学习！
答：謝謝你的稱讚, 我們會更努力! 也謝謝您的參加!

问：大家好，我对双频非常感兴趣，感谢Johan的演讲。希望了解后面双频的发展趋势。感谢
答：Thank you! Please contact our local marketing for more technical discussion. Kenny Liu, 861058798040

问：价格怎么样？性能很好，价格很高的话就难办了！
答：We are very willing to have a business related discussion with you. Actually our P1010 device has been adopted by several China big names on WLAN application. Please contact our local marketing, Kenny Liu, 861058798040

问：SDK和Wifi是怎样联系在一起的呢？
答：SDK 提供Linux環境及應用範例開發人員須porting WLAN driver into SDK (freescale supports updated driver patch in most of the cases).

问：SDK上的优化处理和ASF的机制相同吗？
答：ASF is provided in SDK as an optimization example. Users can extend the coverage to their own application.

问：Ipv4和Ipv6有什么区别吗？在使用ASF时有什么不同吗？
答：Current ASF mode supports only IPv4 acceleration. All the IPv6 packets will be forward to standard linux stack for processing at this point. We expect to extend our ASF support on IPv6 later.

问：无线透传模块性能如何？
答：It depends on the PA and the antennas used on the product. 11ac has a better wireless coverage than 11n. For detailed information you need to go to WLAN vender like Atheros.

问：KinetisX系列什么时候上市？在哪下载资料？
答：http://www.freescale.com/webapp/sps/site/homepage.jsp?code=KINETIS Please contact freescale local support for more detailed information

问：请问下可以送个样品我们学习下，以供今后的项目打一下基础
答：建議連絡freescale本地支持我們可安排拜訪Please contact Kenny Liu, local marketing, B06095@freescale.com, 8610-5879-8040

问：对于您提到的“1个11ac需要1300DMIPS”，这时的11ac速率是多少？数据报文的尺寸是多少？谢谢
答：990Mbps in 11ac single-band UDP (line rate). IxChariot runs in standard 1.3K frame. Thanks.