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| Content Provider | Society for Industrial and Applied Mathematics (SIAM) |
|---|---|
| Author | Guha, Sudipto Naor, Joseph (Seffi) Bar-Noy, Amotz Schieber, Baruch |
| Copyright Year | 2000 |
| Abstract | In heterogeneous networks, sending messages may incur different delays on different links, and each node may have a different switching time between messages. The well-studied telephone model is obtained when all link delays and switching times are equal to one unit. We investigate the problem of finding the minimum time required to multicast a message from one source to a subset of the nodes of size k. The problem is NP-hard even in the basic telephone model. We present a polynomial-time algorithm that approximates the minimum multicast time within a factor of O(log k). Our algorithm improves on the best known approximation factor for the telephone model by a factor of $O(\frac{\log n}{\log\log k})$. No approximation algorithms were known for the general model considered in this paper. |
| Starting Page | 347 |
| Ending Page | 358 |
| Page Count | 12 |
| File Format | |
| ISSN | 00975397 |
| DOI | 10.1137/S0097539798347906 |
| e-ISSN | 10957111 |
| Journal | SIAM Journal on Computing (SMJCAT) |
| Issue Number | 2 |
| Volume Number | 30 |
| Language | English |
| Publisher | Society for Industrial and Applied Mathematics |
| Publisher Date | 2006-07-27 |
| Access Restriction | Subscribed |
| Subject Keyword | postal model LogP model heterogeneous networks combinatorial optimization Analysis of algorithms and problem complexity Approximation algorithms Graph theory approximation algorithms Graph algorithms Network design and communication Communication networks multicast |
| Content Type | Text |
| Resource Type | Article |
| Subject | Mathematics Computer Science |
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