公开(公告)号：KR100801183B1

公开(公告)日：2008-02-05

申请号：KR1020060094240

申请日：2006-09-27

Applicant: 재단법인서울대학교산학협력재단

Inventor： 함성일 ,  이종원 ,  김종권

IPC: H04B7/26 ,  H04B7/02

CPC classification number: H04W74/0825 ,  H04L1/0003 ,  H04W28/06

Abstract: A distributed/opportunistic scheduling method for multiple user diversity gains in an IEEE(Institute of Electrical and Electronic Engineers)802.11 wireless LAN(Local Area Network) is provided to transmit a search message to all mobile nodes as enabling the most suitable node only to respond to the message, thereby maintaining searching overheads at less than a certain level all the time regardless of the number of search target nodes, consequently maximum diversity gains are obtained. A channel search message is broadcasted to all receivers from a transmitter to notify of a channel search intention(S10). Receiving signal strengths are measured for all transmission from the transmitter, and a probability density function of a receiving signal strength is derived from the measured receiving signal strengths(S20). The derived function is classified into predetermined sections(S30). Depending on in which section the current receiving signal strength is included, backoff time is determined(S40). A response message is transmitted after the backoff time(S50). The transmitter transmits data to a receiver which first transmits the response message(S60).

Abstract translation: 提供了IEEE（电气和电子工程师协会）802.11无线LAN（局域网）中用于多用户分集增益的分布式/机会性调度方法，以将搜索消息发送到所有移动节点，使得最合适的节点仅能够响应 因此无论搜索目标节点的数量如何，都始终保持小于一定水平的搜索开销，从而获得最大的分集增益。 频道搜索消息被广播到来自发射机的所有接收者通知频道搜索意图（S10）。 对于从发射机发送的所有传输来测量接收信号强度，并根据测得的接收信号强度导出接收信号强度的概率密度函数（S20）。 派生功能分为预定部分（S30）。 根据在哪个部分中包括当前接收信号强度，确定退避时间（S40）。 在退避时间之后发送响应消息（S50）。 发射机向首先发送响应消息的接收机发送数据（S60）。