公开(公告)号：US20190261138A1

公开(公告)日：2019-08-22

申请号：US15902028

申请日：2018-02-22

Applicant: Cisco Technology, Inc.

Inventor： PASCAL THUBERT ,  PATRICK WETTERWALD ,  PAUL B. DUFFY ,  PATRICK GROSSETETE

IPC: H04W4/06 ,  H04W74/08 ,  H04L1/16 ,  H04W72/00

Abstract: A management device for a low power wide area network can: generate and send, to each constrained wireless network device via a wired gateway, a link layer multicast listener command specifying a listening interval and causing each constrained wireless network device to change from a low-power optimized mode to a listening mode until reception of a multicast data packet within the listening interval; generate collision avoidance parameters including a minimum waiting interval, a maximum waiting interval relative to the listening interval, and a redundancy constant; and instruct the wired gateways to selectively transmit the multicast data packet based on the collision avoidance parameters, wherein each wired gateway responds by waiting a randomly-selected wait interval between the minimum and maximum waiting intervals, and selectively transmitting the multicast data packet only if a received number of the multicast data packet by the corresponding wired gateway is less than the redundancy constant.