| 主权项 |
1. A wireless network system that divides a round period into at least a first period and a second period, each of the periods having multiple time slots, the system comprising:
an access point having a first communication module, wherein the first communication module wirelessly transmits downlink data and receives uplink data; a plurality of routers, each having a second communication module, wherein the second communication module (1) wirelessly receives the downlink data from the access point and transmits the uplink data to the access point and (2) wirelessly transmits the downlink data and receives the uplink data; and a plurality of end devices, each having a third communication module, wherein the third communication module wirelessly receives the downlink data from one of the plurality of routers and transmits the uplink data to the same one of the plurality of routers, wherein an internal network is formed by the access point, the plurality of routers and the plurality of end devices, with the access point being a parent node of the routers and each of the routers being a parent node of a subgroups of the plurality of end devices, forming a two-layer tree network topology, wherein each of the plurality of routers broadcasts one router beacon in each of the time slots of the first period from the router to the router's end devices, and wherein if any end device fails to receive any router beacon transmitted from its parent node in the first period, the end device will sleep during the second period. |
