Abstract
This paper is envisaged to provide a first quantitative study on how much indoor deployed Wi-Fi can offload the operator’s 3G HSPA macro cellular networks in a real largescale dense-urban scenario. Wi-Fi has been perceived as a costeffective mean of adding wireless capacity by leveraging low-cost access points and unlicensed spectrum. However, the quantitative offloading gain that Wi-Fi can achieve is still unknown. We studied the Wi-Fi offloading gain as a function of access point density, where it is shown that 10 access points/km2 can already boost average user throughput by 300% and the gain increases linearly proportional to the access point density. Indoor Wi-Fi deployment also significantly reduces the number of users in outage, especially for indoor area. A user is considered to be in outage if they have a user throughput less than 512 kbps. We also propose three Wi-Fi deployment algorithms: Traffic-centric, Outage-centric, Uniform Random. Simulation results show that Traffic-centric performs best in boosting average user throughput while Outage-centric performs best in reducing user outage. Finally, Wi-Fi offloading solution is compared with another offloading solution – HSPA Femto cell. We show that Wi-Fi provides both much higher average user throughput and network outage reduction than HSPA Femto cells by exploring
20 MHz unlicensed ISM band.
20 MHz unlicensed ISM band.
Originalsprog | Engelsk |
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Titel | 75th Vehicular Technology Conference (VTC Spring), 2012 IEEE |
Antal sider | 6 |
Forlag | IEEE Press |
Publikationsdato | 2012 |
ISBN (Trykt) | 978-1-4673-0989-9 |
ISBN (Elektronisk) | 978-1-4673-0988-2 |
DOI | |
Status | Udgivet - 2012 |
Begivenhed | 2012 IEEE 75th Vehicular Technology Conference - Yokohama, Japan Varighed: 6 maj 2012 → 9 maj 2012 |
Konference
Konference | 2012 IEEE 75th Vehicular Technology Conference |
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Land/Område | Japan |
By | Yokohama |
Periode | 06/05/2012 → 09/05/2012 |
Navn | I E E E V T S Vehicular Technology Conference. Proceedings |
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ISSN | 1550-2252 |