کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
450107 693815 2011 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cross-layer optimization for wireless mesh networks with smart antennas
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
پیش نمایش صفحه اول مقاله
Cross-layer optimization for wireless mesh networks with smart antennas
چکیده انگلیسی

A cross-layer optimization framework for wireless mesh networks is presented where at each node, various smart antenna techniques such as beam-forming, spatial division multiple access and spatial division multiplexing are employed. These techniques provide interference suppression, capability for simultaneous communication with several nodes and transmission with higher data rates, respectively, through multiple antennas. By integrating different combinations of the multi-antenna techniques in physical layer with various constraints from MAC and network layers, three Mixed Integer Linear Programming (MILP) models are presented to minimize the system activation time. Since these optimization problems are complex combinatorial, the optimal solution is approached by a Column Generation decomposition method. The numerical results for different network scenarios with various node densities, number of antennas, transmission ranges and number of sessions are provided. It is shown that the resulted directive, multiple access and multiplexing gains combined with scheduling, effectively increase both the spectrum spatial reuse and the capacity of the links and therefore, enhance the achievable system throughput. Our cross-layer approach is also extended to consider heterogeneous networks and we present a multi-criteria optimization framework to model the design problem where the objective is to jointly minimize the cost of deployment and the system activation time. Our results reveal the benefits of joint design in terms of reducing the cost of deployment while achieving higher system performance.


► We present a cross-layer MILP framework for wireless mesh networks with smart antenna techniques.
► We employ beam-forming, spatial division multiple access and spatial division multiplexing.
► The exact optimal solution for the design problem is obtained through CG decomposition method.
► We extend the problem to a multi-criteria optimization of the throughput and the cost of deployment.
► Our design results in a lower cost of deployment and a higher performance in heterogeneous networks.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Communications - Volume 34, Issue 16, 1 October 2011, Pages 1894–1911
نویسندگان
, , ,