{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,19]],"date-time":"2025-06-19T04:25:33Z","timestamp":1750307133312,"version":"3.41.0"},"reference-count":22,"publisher":"Association for Computing Machinery (ACM)","issue":"4","license":[{"start":{"date-parts":[[2011,12,1]],"date-time":"2011-12-01T00:00:00Z","timestamp":1322697600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":["SIGBED Rev."],"published-print":{"date-parts":[[2011,12]]},"abstract":"<jats:p>In many applications of wireless control networks, the latency of message delivery is an important consideration. In a lighting control network where a light switch sends a wireless message to a lamp, a worst case end-to-end latency of 200 ms or better is desired, so that the working of the switch feels 'immediate' to the end user. This paper studies the probability that latency deadlines of a few hundred ms are exceeded. We use a 802.15.4 test network, located in a real-life office environment, to evaluate and compare the effects of several re-try and re-routing strategies and different MAC parameter settings. Testing under realistic conditions, in an office environment when people are present, is important to accurately determine worst case latency performance as experienced by end users. At night, without any people in the building, performance is much better than during the day. In order to accurately observe the effect of different strategies, test runs lasting at least a week are needed. We find that retrying message delivery via a single delivery route is sub-optimal. Keeping a set of two or more candidate routes for subsequent retries greatly improves worst-case latency. We show that the use of time slotting and energy saving strategies is not necessarily incompatible with the goal of optimizing for human-observable latency.<\/jats:p>","DOI":"10.1145\/2095256.2095261","type":"journal-article","created":{"date-parts":[[2012,1,17]],"date-time":"2012-01-17T17:21:44Z","timestamp":1326820904000},"page":"35-42","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Real-time routing and retry strategies for low-latency 802.15.4 control networks"],"prefix":"10.1145","volume":"8","author":[{"given":"Koen","family":"Holtman","sequence":"first","affiliation":[{"name":"Philips Research, the Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter","family":"van der Stok","sequence":"additional","affiliation":[{"name":"Philips Research, the Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2011,12]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1145\/958491.958493"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/958491.958494"},{"key":"e_1_2_1_3_1","unstructured":"IEEE Computer society part 15.4 Wireless medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low Rate Wireless personal Area networks (LRWPAN) Institute of Electrical and Electronics Engineers Inc. 2003.  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