Conference proceeding
Delay minimizing user association in cellular networks via hierarchically well-separated trees
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Conference Proceedings, 4005
01 Jun 2015
Abstract
Conference Title: ICC 2015 - 2015 IEEE International Conference on Communications Conference Start Date: 2015, June 8 Conference End Date: 2015, June 12 Conference Location: London, United Kingdom We study downlink delay minimization within the context of cellular user association policies that map mobile users to base stations. We note the delay minimum user association problem fits within a broader class of network utility maximization and can be posed as a non-convex quadratic program. This non-convexity motivates a split quadratic objective function that captures the original problem's inherent tradeoff: association with a station that provides the highest signal-to-interference-plus-noise ratio (SINR) vs. a station that is least congested. We find the split-term formulation is amenable to linearization by embedding the base stations in a hierarchically well-separated tree (HST), which offers a linear approximation with constant distortion. We provide a numerical comparison of several problem formulations and find that with appropriate optimization parameter selection, the quadratic reformulation produces association policies with sum delays that are close to that of the original network utility maximization. We also comment on the more difficult problem when idle base stations (those without associated users) are deactivated.
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Details
- Title
- Delay minimizing user association in cellular networks via hierarchically well-separated trees
- Creators
- Jeffrey WildmanYusuf OsmanliogluSteven WeberAli Shokoufandeh
- Publication Details
- The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Conference Proceedings, 4005
- Publisher
- The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Computer Science (Computing); Electrical and Computer Engineering
- Identifiers
- 991019170135304721