Title :
Impact of communication delays and deadline times on distributed processing in packet radio networks
Author :
Doyle, R.J. ; Shahnawaz, I. ; Sastry, A.R.K.
Author_Institution :
Rockwell Int. Sci. Center, Thousand Oaks, CA, USA
Abstract :
The authors describe a simulation model to aid in the evaluation of time-critical distributed processing scenarios utilizing a multihop packet radio networks. The simulation model includes a user-defined network, spread-spectrum random-access protocols, end-to-end transport functions, and an error model that includes the effects of interference from concurrent transmissions as well as that of an on-off partial band jammer. An abstract description of a typical distributed processing scenario with hierarchical primary and subtask structures, in which a distributed task is described by a `script´, has been devised. In this representation, a distributed task consists of a primary task and a hierarchy of one or more subtasks. Numerical results were obtained through simulations representing a wide variety of task scenarios. Processing scenarios include assignment of task deadlines with levels of task-subtask hierarchy, and redundant processing on multiple hosts
Keywords :
distributed processing; military systems; packet radio networks; protocols; spread spectrum communication; communication delays; concurrent transmissions; deadline times; distributed processing; end-to-end transport functions; error model; interference; multihop packet radio networks; on-off partial band jammer; packet radio networks; redundant processing; simulation model; spread-spectrum random-access protocols; tactical systems; time-critical distributed processing; Access protocols; Distributed processing; Intelligent networks; Interference; Mobile communication; Packet radio networks; Spread spectrum communication; Telecommunication traffic; Time factors; Traffic control;
Conference_Titel :
Military Communications Conference, 1992. MILCOM '92, Conference Record. Communications - Fusing Command, Control and Intelligence., IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0585-X
DOI :
10.1109/MILCOM.1992.244131