1、 Wi-Fi SoC 芯片在IoT智能设备中的应用 提纲IOT智能设备的连接技术及其发展趋势 Wi-Fi Bluetooth Smart Z-Wave ZigBee ThreadIOT设备的 Wi-Fi SoC 智能技术方案 集成方案(Highly Integrated SoC)智能设置(Smart Configuration)省电优化(Power Saving Optimization)桥接技术(Bridge for Mesh)自动互联(Auto Link in Mesh)2提纲IOT智能设备的连接技术及其发展趋势 Wi-Fi Bluetooth Smart Z-Wave ZigBee Th
2、readIOT设备的 Wi-Fi SoC 智能技术方案 集成方案(Highly Integrated SoC)智能设置(Smart Configuration)省电优化(Power Saving Optimization)桥接技术(Bridge for Mesh)自动互联(Auto Link in Mesh)3IOT智能设备的连接技术4IOT Smart DevicesWi-Fi A.K.A Wireless LANBased on IEEE 802.11 MAC/PHY Specification802.11b(1999)/g(2003)/n(2009)Running at 2.4 GHzR
3、ate up to 150 Mbps for 1X1 at 40 MHz bandwidth in 11n802.11a(1999)/n(2009)/ac(2013)Running at 5GHzRate up to 867 Mbps for 1X1 at 160 MHz bandwidth in 11ac802.11ad(WiGig,2012.Merged with Wi-Fi in 2013)Running at 60 GHz 6.75 Gbps802.11af (White-Fi/Super Wi-Fi,2014)Running on white space spectrum in th
4、e VHF/UHF bands between 54 and 790 MHzRate is 26.7 Mbps for 6/7 MHz channels and 35.6 Mbps for 8MHz channel802.11ah(Est 2016)Low power and range up to 1kmRunning at 900 MHzRate at least 100 Kbps802.11ax(early stage)Based on 802.11acRunning at 5GHzSignificantly improved throughput in dense deployment
5、sBluetooth Smart A.K.A Bluetooth Low Energy(BLE)Based on Bluetooth 4.0 standard released in 2010Enhanced in version 4.1 and 4.2 For low power devices like healthcare,fitness,wearable etc.Not backward compatible with classic Bluetooth protocolRunning at 2.4 GHzRate 1MbpsZ-Wave Proprietary design(from
6、 Sigma Designs Inc.)Low powerFor battery-operated devices like smoke alarms,security sensors etc.Running at 900 MHzRate up to 100 kbpsZigBee Based on IEEE 802.15.4 ratified in 2004Conceived in 1998,standardized in 2003 and revised in 2006Mesh network topology(OK with Star and Tree)ZigBee PRO(A.K.A Z
7、igBee 2007)Backward compatible with ZigBee 2006 devices Enhanced routing processZigBee IP(ZIP,2014)IPv6 Over 6LoWPANUp to 65K devices per networkLow Cost,Low PowerRunning at 2.4GHz globallyRate up to 250 kbpsThread Alliance initiated by Google in July 2014Running on existing 802.15.4 siliconStack ba
8、sed on 802.15.4-2006 versionUDP with IPv6Over 6LoWPANUp to 250 devices per networkDesigned for very low power operationRunning at 2.4GHzRate up to 250 kbps连接方案比较 10Wi-FiBLEZ-WaveZigBeeThreadIndoor Range50m50m30m10-20m10-20mMax#of deviceImplementation dependentImplementation dependent23265K250Data Ra
9、te1Gbps1Mbps100 Kbps250 Kbps250 KbpsFrequency2.4 GHz/5GHz2.4GHz908/916 MHz(U.S)2.4GHz2.4 GHzMesh SupportYes*No*LimitedYesYesIP SupportV4/V6V4/V6NoV6*V6Low PowerNo*YesYesYesYes结论 11Wi-FiBLEZ-WaveZigBeeThreadWell Deployed?*High Throughput?Long Range?*Internet Connection?*Power Friendly?*Good Roadmap?W
10、i-Fi is still a GREAT solution for IOT提纲IOT智能设备的连接技术及其发展趋势 Wi-Fi Bluetooth Smart Z-Wave ZigBee ThreadIOT设备的 Wi-Fi SoC 智能技术方案 集成方案(Highly Integrated SoC)智能设置(Smart Configuration)省电优化(Power Saving Optimization)桥接技术(Bridge for Mesh)自动互联(Auto Link in Mesh)12待解技术要点Low Cost Highly integrated SoCEasy Confi
11、guration Smart configurationLow Power Good power saving schemeMesh Network Simple solution with Wi-Fi bridge Mesh becomes more important in order to increase the range提纲IOT智能设备的连接技术及其发展趋势 Wi-Fi Bluetooth Smart Z-Wave ZigBee ThreadIOT设备的 Wi-Fi SoC 智能技术方案 集成方案(Highly Integrated SoC)智能设置(Smart Configur
12、ation)省电优化(Power Saving Optimization)桥接技术(Bridge for Mesh)自动互联(Auto Link in Mesh)14集成方案(Highly Integrated SoC)Integrate components to a single SoC Controller Wi-Fi Low RBOM-integrate as many as possible including PA,LNA,T/R switch etc.Process upgrade 55 nm 40 nm 28 nm Other methods that can reduce t
13、he die size Reduce memory etc.提纲IOT智能设备的连接技术及其发展趋势 Wi-Fi Bluetooth Smart Z-Wave ZigBee ThreadIOT设备的 Wi-Fi SoC 智能技术方案 集成方案(Highly Integrated SoC)智能设置(Smart Configuration)省电优化(Power Saving Optimization)桥接技术(Bridge for Mesh)自动互联(Auto Link in Mesh)16智能设置(Smart Configuration)No screen/No keypad for most
14、of IOT devicesConfigure through Phone/Pad devicesSolutions Probe Request Based Multicast Data Based Micro AP BasedProbe Request Based18IOTIOTProbe RequestConnectionGet SSID&Password from Probe request Ext-APConnectionMulticast Data Based19Ext-APIOTIOTMulticast DataConnectionGet SSID&Password from mu
15、lticast data ConnectionMicro AP Based20IOTIOTConnection&ProvisioningRunning in Micro AP modeConnectionGet SSID and Password from provisioning data Ext-AP技术方案比较 21ProbeMulticastMicro APFast configuration?Easy to use?Works with all Ext-AP?Android Phone/Pad?iPhone/iPad(w/o WAC)?Which one to use?Combine
16、d solutionProbe Request Multicast Data Micro AP提纲IOT智能设备的连接技术及其发展趋势 Wi-Fi Bluetooth Smart Z-Wave ZigBee ThreadIOT设备的 Wi-Fi SoC 智能技术方案 集成方案(Highly Integrated SoC)智能设置(Smart Configuration)省电优化(Power Saving Optimization)桥接技术(Bridge for Mesh)自动互联(Auto Link in Mesh)22省电优化(Power Saving Optimization)Reduce
17、 transmission power Range is shortened Compensated by mesh topologyHost controller sleep Offload connection maintenance to Wi-Fi module Keep controller sleep during idle Turn off Wi-Fi module during idle and fast recovery when neededAdjustable wakeup period in Wi-Fi Use multiple DTIM scheme Wake up
18、every N beacon intervals23提纲IOT智能设备的连接技术及其发展趋势 Wi-Fi Bluetooth Smart Z-Wave ZigBee ThreadIOT设备的 Wi-Fi SoC 智能技术方案 集成方案(Highly Integrated SoC)智能设置(Smart Configuration)省电优化(Power Saving Optimization)桥接技术(Bridge for Mesh)自动互联(Auto Link in Mesh)24桥接技术(Bridge for Mesh)Wi-Fi Mesh NetworkWhat kind of MeshBr
19、idge for Wi-FiLearning Table in BridgeStackable BridgeBridge based Wi-Fi Mesh NetworkWi-Fi Mesh NetworkWhat is Wi-Fi Mesh?Each node can relay/forward data for the network Router/Portal connected to LAN or Internet Self forming for the best path Self healing to recover the linkWhy Mesh for Wi-Fi netw
20、ork?Compensate the range reduced by lowering transmission power Increase the reliability of network connectivity802.11S(Mesh Specification)Initiated in 2004,ratified in 2011 Based on HWMP(Hybrid Wireless Mesh Protocol)for MAC address based routing Used in OLPC(One Laptop Per Child)What Kind of Mesh?
21、Not 802.11S Complicated in implementation Need more resource in memory,CPU power etc.in order to work efficiently Inter-operability issue due to lack of full support from vendorsBridge Based Mesh Mature technology Cost-effective Simplified implementation to cover forming and healingBridge for Wi-FiE
22、ach Bridge has 3 componentsBridgeIn-APIn-STAIP/MAC address basedSource learningMAC address conversionBroadcast/multicast handlingSupport both IPv4 and IPv6ARP(Address Resolution Protocol)checking for IPv4NDP(Neighbor Discovery Protocol)checking for IPv6DHCP checkingPacket is forwarded/bridged betwee
23、n IOT device and routerLearning Table in BridgeLearning table is built up based on both IP address and MAC addressCorresponding port number decides where to forward the packet叠桥技术(Stackable Bridge)Bridges can be linked to another bridge in order to extend longer range.Bridge based Wi-Fi Mesh Network
24、Multiple bridges linked to each other to forward traffic between IOT devices and router(Ext-AP)提纲IOT智能设备的连接技术及其发展趋势 Wi-Fi Bluetooth Smart Z-Wave ZigBee ThreadIOT设备的 Wi-Fi SoC 智能技术方案 集成方案(Highly Integrated SoC)智能设置(Smart Configuration)省电优化(Power Saving Optimization)桥接技术(Bridge for Mesh)自动互联(Auto Link
25、 in Mesh)32自动互联(Auto Link)Link and Path build UpNode AdditionNode RemovalLink and Path Optimization创建接点连接(Link and Path build up)Forming Simplify the implementation No 802.11aq(shortest path bridge)No 802.1d(spanning tree)Based on Received Signal Strength Indicator(RSSI)Healing Dead loop detection R
26、SSI monitoring No change required for good link Periodically scanning to look for better link Node addition/Node removal Auto recovery after link lost添加接点及续连(Node Addition)Link re-established when a new node is addedADD移除接点及续连(Node Removal)Link re-established when a node is removedRMV优化接点连接路径(Link/P
27、ath Optimization)Redundant links are removed during optimizationDead loop(DL)is blockedDLReview前述要点回顾Wi-Fi is still a GREAT solution for IOT connectivity Valuable to invest moreSmart Configuration Provide easy Wi-Fi setupPower Optimization Lower transmission power Sleep as long as possibleBridge Based Wi-Fi Mesh network Compensate range reduced by lowering transmission power Reduce development cycle and cost with mature technology Optimize link/path to have efficient performance
