5G ???????У?????????????????????
5G ???????У?
????????????????????
????????????????????
????????????????????????Χ??????????????????????????ж?????似?????????????????? Wi-Fi??ZigBee??Z-Wave??Thread??Bluetooth™??Wi-SUN ????????????????е??ж?????????????????????????????????????????????????????????????????????????????? 2G??3G??4G ???ж?????????????????????ò?????ж???????????????????????????????????????????????????С?????????????????????????????????????????????ν?????????????????????????????????????????????????????????????????? (Low Power Wide Area Network??LPWAN)??????????????????????????? NB-IoT???????????????????????????
?????????????????
?????????????????·
???????????????????????????????в???????????????????????????????????????????????????????????????????????????????±??????????????????????????
*1: Low-Power Wide-Area Network Range > 1km, ????: LoRA, SigFox, NB-IoT
*2: Short Range < 100m, ????: ZigBee, Thread, Z-Wave or Bluetooth
???????????????????????????? IEEE 802.15.x ???????????????????????????????????????????????
??????????????????????????
??????????????????????????????????????????????????????????ο????????????????а??????????????? IEEE 802.15.4 ?????е????????? ZigBee Pro??Thread??RF4CE????????? Thread ??????????????????????????????(1)???????????Google??Arm????????Apple ??? 2018 ????? Thread ?????(2)???? IP ???????Э?飬??????????Э??????????????ɡ?(3)???????????????????????????????????緽?????á??????????г???????????????
????????????????? IEEE 802.15.4 ????????Э???????????????????????????? ZigBee ?? Thread??????? Thread????????÷??棬?????е???????????????? Smart Home??Medical Devices??Auto Metering??Smart Building ?? Industrial ?????????????
NuMicro M2351?? Thread ?ο???????
?????λ??????? Cascoda ??????????????????????? 802.15.4 ??? MAC(Media Access Control) layer ?? Transceiver ??ο????????? M2351 ?????? TrustZone® ???? XOM ???????????Э????????????????滮?????????? XOM (eXecute-Only Memory) ??????????? Cascoda ?? Transceiver ICs (CA8210, CA8211) ??????? MAC ?????????? (ROM-based MAC firmware ?? MAC Co-processor)?????? M2351 ???????? MAC ?????????????? IP ???????????ò??????????????????? MAC ?????????? (Low-MAC Transceiver) ??????????
??Э??? API ?? Timing ??????С?????????????????
???????????????? OS ????????С
?????????? MAC ???????????з????Э??????????????????
???????????????????? Cascoda ?????????????????????????? 3 ??????????书?????????????????????????????????????????????????????????????????????????????и?????????????????????????????????????????????Э?????????????????ο???????????????????о?????????????????????????????????????????????????????????????????????????????????á?
???? 802.15.4 Thread ?ο???????????????????????г?????
???? M2351 ????????????г?????????????????? TrustZone® ??????? OpenThread ??Э?飬????????????????????????? RTOS????Щ??????? RTOS ?????? TrustZone® ???????????????? Armv8-M ?????????????????????????????????????????????????????????????г?????
????????????????????Χ?????????
????????ο????????????????????е? 802.15.4 Thread ?????Cascoda ????????????? OpenThread Stack ?ο???????????????Э??????????????
??/??????????????????????
????????г??????????á?802.15.4 ????????? Comcast, Amazon Echo+, Google NEST??Cascoda ?????????????????????????????????????????????????????????????????????????????Ч??? 802.15.4 Thread ??????ο?????????
????zzy ?????????2021-12-30
