Quick spatial data access using expanded cells in non-flat wireless data broadcast over multiple channels
- Authors
- Hwang, Heejoung; Im, Seokjin; Choi, Jintak
- Issue Date
- Dec-2015
- Publisher
- ASIA LIFE SCIENCES
- Keywords
- wireless spatial data broadcast; non-flat broadcast; location-dependent information service; air index
- Citation
- ASIA LIFE SCIENCES, pp.293 - 308
- Journal Title
- ASIA LIFE SCIENCES
- Start Page
- 293
- End Page
- 308
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/9908
- ISSN
- 0117-3375
- Abstract
- Wireless spatial data broadcasting supports a great number of clients effectively to access location-dependent information. A non-flat broadcasting scheme helps clients quickly access their desired data items by disseminating clients' preferred data items, called hot data, more frequently than others (regular data) in a broadcast cycle. A system adopting non-flat scheme with a single broadcasting channel can cause the data access time of clients long because the length of a broadcasting cycle is lengthened by the replication of hot data. We propose a spatial indexing scheme using expanded grid cells that adopts non-flat broadcasting scheme over multiple channels. The proposed indexing scheme allows clients to access queried data items quickly by reducing the size of the search space for a given query. Also, when clients access hot data and regular data items simultaneously, the proposed indexing scheme reduces the access time because of the reduced length of a broadcasting cycle by adopting multiple channels. Performance evaluation through simulation studies discloses the proposed indexing scheme outperforms existing schemes with respect to the access time.
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Collections - IT융합대학 > 컴퓨터공학과 > 1. Journal Articles
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