Functional Monitoring without Monotonicity

9 years 3 months ago
Functional Monitoring without Monotonicity
The notion of distributed functional monitoring was recently introduced by Cormode, Muthukrishnan and Yi [CMY08] to initiate a formal study of the communication cost of certain fundamental problems arising in distributed systems, especially sensor networks. In this model, each of k sites reads a stream of tokens and is in communication with a central coordinator, who wishes to continuously monitor some function f of , the union of the k streams. The goal is to minimize the number of bits communicated by a protocol that correctly monitors f (), to within some small error. As in previous work, we focus on a threshold version of the problem, where the coordinator's task is simply to maintain a single output bit, which is 0 whenever f () (1-) and 1 whenever f () . Following Cormode et al., we term this the (k, f, , ) functional monitoring problem. In previous work, some upper and lower bounds were obtained for this problem, with f being a frequency moment function, e.g., F0, F1, F2...
Chrisil Arackaparambil, Joshua Brody, Amit Chakrab
Added 03 Dec 2009
Updated 03 Dec 2009
Type Conference
Year 2009
Authors Chrisil Arackaparambil, Joshua Brody, Amit Chakrabarti
Comments (0)