公开(公告)号：EP1473870A3

公开(公告)日：2004-12-22

申请号：EP04252278.9

申请日：2004-04-19

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Balachandran, Krishna ,  Kang, Joseph H. ,  Lau, Wing Cheong

IPC: H04L12/12 ,  H04L12/28

CPC classification number: H04L12/12 ,  H04W52/0245 ,  H04W52/0277 ,  H04W84/18 ,  Y02D70/164 ,  Y02D70/22

Abstract: In a multiple node network, the method includes waking up at least one node from a sleep mode during at least one associated slot of a time-slotted frame, the sleep mode being a low power consumption mode. Also, in at least one node of a multiple node network, the period of time a node sleeps is based on the residual energy of the node, the residual energy of the nodes in the neighborhood, neighborhood node density, and combinations thereof.

公开(公告)号：EP1257068A3

公开(公告)日：2003-02-26

申请号：EP02252409.4

申请日：2002-04-03

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Balachandran, Krishna ,  Kang, Joseph H. ,  Sanwal, Kumud K. ,  Seymour, James Paul

IPC: H04B1/713

CPC classification number: H04B1/7143 ,  H04B2001/7154

Abstract: A wireless endpoint employs frequency hopping for communicating signals in a wireless communications system. Over a time period T , the wireless endpoint performs pseudo-random selection of a frequency from a hopping set of N frequencies such that over at least a portion of the time period T , the frequency selection is constrained to less than the N frequencies.