Quick Data Access on Multiple Channels in Non-flat Wireless Spatial Data Broadcasting

SeokJin IM  JinTak CHOI  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.9   pp.3042-3046
Publication Date: 2012/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.3042
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
wireless communication,  non-flat data broadcast system,  air index,  multi-channel,  window query,  

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In this letter, we propose a GRid-based Indexing scheme on Multiple channels (GRIM) for processing spatial window queries in non-flat wireless spatial data broadcasting. When the clients access both popular and regular items simultaneously, GRIM provides the clients with improved access time by broadcasting popular items separately from regular ones in units of grid cells over multiple channels. Simulations show that the proposed GRIM outperforms the existing indexing scheme in terms of the access time.