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When making 4G sites planning scheme, telecom operators prefer to reuse the existing 2G/3G site resources to reduce capital and operating expenditure. However, 4G is a typical co-frequency interference network with characteristics of hard handover and mode 3 interference. Thus, it is of great significance to identify the high-risk original 2G/3G sites which may cause interference problem. Based on...
Database-driven cognitive radio has been well recognized as an efficient way to reduce interference between Primary Users (PUs) and Secondary Users (SUs). In database-driven cognitive radio, PUs and SUs must provide their locations to enable dynamic channel allocation, which raises location privacy breach concern. Previous studies only focus on unilateral privacy preservation, i.e., Only PUs' or SUs'...
Traffic shifting is an efficient load balancing method to offload traffic from a hot-spot cell to neighbouring cells. This paper proposes a channel-aware optimised traffic shifting (COTS) scheme in LTE-Advanced relay networks. The COTS scheme employs a channel-aware assistant cell selection mechanism, which considers users' channel condition, received from the relay station (RS) in neighbouring cells,...
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