Architecture and Abstractions for Environment and Traffic Aware System-Level Coordination of Wireless Networks
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This paper presents a system level approach to interference management in an infrastructure based wireless network with full frequency reuse. The key idea is to use loose base station coordination that is tailored to the spatial load distribution and the propagation environment to exploit the diversity in a user population’s sensitivity to interference. System architecture and abstractions to enable such coordination are developed for both the downlink and the uplink cases, which present differing interference characteristics. The basis for the approach is clustering and aggregation of trafﬁc loads into classes of users with similar interference sensitivities that enable coarse grained information exchange among base stations with greatly reduced communication overheads. The paper explores ways to model and optimize the system under dynamic trafﬁc loads where users come and go resulting in interference induced performance coupling across base stations. Based on extensive system-level simulations, we demonstrate load-dependent reductions in ﬁle transfer delay ranging from 20-80% as compared to a simple baseline not unlike systems used in the ﬁeld today, while simultaneously providing more uniform coverage. Average savings in user power consumption of up to 75% is achieved. Performance results under heterogeneous spatial loads illustrate the importance of being trafﬁc and environment aware.
SubjectQ Science::Q Science (General)
Q Science::QA Mathematics::QA75 Electronic computers. Computer science
T Technology::T Technology (General)
T Technology::TA Engineering (General). Civil engineering (General)
T Technology::TK Electrical engineering. Electronics Nuclear engineering