Return-Path: william@bourbon.usc.edu Delivery-Date: Thu Dec 11 18:49:51 2008 X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on merlot.usc.edu X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=AWL,BAYES_00 autolearn=ham version=3.2.3 Received: from bourbon.usc.edu (bourbon.usc.edu [128.125.9.75]) by merlot.usc.edu (8.14.1/8.14.1) with ESMTP id mBC2npDp000875 for ; Thu, 11 Dec 2008 18:49:51 -0800 Received: from bourbon.usc.edu (localhost.localdomain [127.0.0.1]) by bourbon.usc.edu (8.14.2/8.14.1) with ESMTP id mBC2qSu0001642 for ; Thu, 11 Dec 2008 18:52:28 -0800 Message-Id: <200812120252.mBC2qSu0001642@bourbon.usc.edu> To: cs551@merlot.usc.edu Subject: Re: Sensor nw ques Date: Thu, 11 Dec 2008 18:52:28 -0800 From: Bill Cheng Someone wrote: > Ques about sensor networks : > > 1) Please explain 'gradient establisment' Sorry! The time for such a question was during lectures. Please read the paper. > 2) slide 11 : > Directed diffusion uses attribute-based naming > b) sensors publish sensor IS acoustic; target EQ *; > lat IS 100.5; long IS 43.05 > a) sinks subscribe to sensor EQ acoustic; target IS lions; > lat GT 100; lat LT 101; long GT 43; long LT 44 > Understood point a . Plz explain point b. Are a and b related ? (a) and (b) are separate examples. -- Bill Cheng // bill.cheng@usc.edu