The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 2009
Filed:
Jul. 02, 2003
Kyung-hun Jang, Suwon, KR;
Hyo-sun Hwang, Suwon, KR;
Jong-ae Park, Yongin, KR;
Abstract
A reliable multicast data retransmission method by grouping wireless terminals in a wireless communication environment and performing multicast data retransmission for a particular group of wireless terminals that needs multicast data retransmission, thereby providing reliable multicast data retransmission and improving the efficiency of a network. The multicast data retransmission method includes grouping wireless terminals based on distances between an access point and the wireless terminals and the amplitudes of signals output from the wireless terminals, selecting a repeater, which is to retransmit multicast packets, from each group and arranging the order in which repeaters retransmit multicast packets, creating a multicast packet train header indicating characteristics of each of the multicast packets, multicasting the created multicast packet train header. The multicast packets are retransmitted in the arranged order.