Carte Multi-User Access in High-Efficiency WLANs Saloua BRAHMI

Multi-User Access in High-Efficiency WLANs

OFDMA Multi-User Communications in IEEE 802.11ax HEW. DE

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Legare: Carte broșată
Editura: OmniScriptum
Disponibilitate: În depozitul extern
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291.88 lei
To promote the MU (Multi-User) communications in High-Efficiency WLANs, the new IEEE 802.11ax standa...

Informații despre carte

Limbă
engleză
Legare
Carte - Carte broșată
Publicat
2024
Pagini
120
EAN
9786207488285
Enbook ID
46023559
Editura
Greutate
197
Dimensiuni
150 x 220

Descriere completă

To promote the MU (Multi-User) communications in High-Efficiency WLANs, the new IEEE 802.11ax standard introduced the concept of RU (Resource Unit) by means of the OFDMA transmission technique. Although the OFDMA MU communications enable multiple users to be served at the same time in both DL (Down-Link) and UL (Up-Link) directions, several challenges remain to be met in order to design a MAC (Medium Access Control) protocol that fairly allocates and effectively utilizes the RUs. The challenges addressed are: (1) define when and how using 802.11ax control frames, (2) establish a fair sending policy of UL needs, (3) adopt a strategy to select a channel structure, and (4) avoid loss in spectral efficiency and timeout BA (Block Acknowledgment). In this thesis, we proposed the FAEU-RUs protocol (Fair Allocation and Effective Utilization of RUs) by meeting each of the challenges of OFMDA MU communications. The performance evaluation demonstrates that the FAEU-RUs protocol significantly enhances the overall performance of the network but also the individual performance of each type of traffic (DL and UL) and each category of station.

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