Cooperative Spatial Reuse with
Authors
Chaussonniere, Nicolas ; Bouaziz, Anne-Lise
Term
10. term
Publication year
2007
Abstract
Denne rapport undersøger, om og hvordan Cooperative Spatial Reuse (CSR) med transmit beamforming kan forbedre kapacitetsudnyttelsen i WLAN-lignende netværk i forhold til en klassisk TDMA-baseret MAC. Konkret sammenlignes en traditionel MRC-TDMA transmit beamforming-baseline med en ZF-CSR transmit beamforming, der muliggør samtidige transmissioner fra en MISO-sender. Arbejdet omfatter både analytiske sammenligninger af SNR og linkkapacitet samt omfattende simuleringer af to- og tre-link scenarier under Rice-kanaler, hvor antal sendeantenner (2–4), gennemsnitlig SNR og K-faktor varieres. Analysen vurderer CSR-tilgængelighed, kapacitetsforhold mellem ZF og MRC og den samlede kapacitetsgevinst ved samtidige transmissioner. Resultaterne kortlægger de betingelser, hvor CSR er muligt og potentielt fordelagtigt, og de illustrerer, hvordan antenneantal, SNR og udbredelsesforhold påvirker de opnåelige gevinster; uddraget indeholder dog ikke specifikke tal eller endelige konklusioner.
This thesis examines whether and how Cooperative Spatial Reuse (CSR) with transmit beamforming can improve capacity use in WLAN-like networks compared to a classical TDMA-based MAC. Specifically, it compares a traditional MRC-TDMA transmit beamforming baseline to ZF-CSR transmit beamforming that enables simultaneous transmissions from a MISO transmitter. The study combines analytical comparisons of SNR and link capacity with extensive simulations of two- and three-link scenarios over Rician channels, varying the number of transmit antennas (2–4), average SNR, and K-factor. The analysis evaluates CSR availability, the capacity ratio between ZF and MRC, and the aggregate capacity gain achievable with concurrent transmissions. The results map the conditions under which CSR is feasible and potentially beneficial, and show how antenna count, SNR, and propagation characteristics shape the gains; however, the excerpt does not provide specific numerical outcomes or final conclusions.
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