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- Title
Spatial channel reuse in wireless sensor networks.
- Authors
Xiaofei Wang; Toby Berger
- Abstract
Abstract Wireless sensor networks (WSN) are formed by network-enabled sensors spatially randomly distributed over an area. Because the number of nodes in the WSNs is usually large, channel reuse must be applied, keeping co-channel nodes sufficiently separated geographically to achieve satisfactory SIR level. The most efficient channel reuse configuration for WSN has been determined and the worst-interference scenario has been identified. For this channel reuse pattern and worst-case scenario, the minimum co-channel separation distance consistent with an SIR level constraint is derived. Our results show that the two-hop co-channel separations often assumed for sensor and ad hoc networks are not sufficient to guarantee communications. Minimum co-channel separation curves given various parameters are also presented. The results in this paper provide theoretical basis for channel spatial reuse and medium access control for WSN s and also serve as a guideline for how channel assignment algorithms should allocate channels. Furthermore, because the derived co-channel separation is a function of the sensor transmission radius, it also provides a connection between network data transport capacity planning and network topology control which is administered by varying transmission powers.
- Subjects
DETECTORS; ELECTRIC network topology; WIRELESS communications; COMPUTER engineering -- Computer-aided design
- Publication
Wireless Networks (10220038), 2008, Vol 14, Issue 2, p133
- ISSN
1022-0038
- Publication type
Article
- DOI
10.1007/s11276-006-8743-z