THEME 4 INTEGRATED WIRELESS/OPTICAL ACCESS
|“Improving Throughput and Fairness in Virtualized 802.11 Networks through Association Control” Mahsa Derakhshani, Xiaowei Wang, Tho Le-Ngoc, McGill University, Alberto Leon-Garcia, university of Toronto|
|“QoS-Oriented Slice Provisioning in Wireless Virtualized Networks” Vikas Jumba, Saeideh Parsaei Fard, Mahsa Derakhshani, Tho Le-Ngoc, McGill University|
|“Management of Virtualized and Software-Defined Wireless Infrastructures: Issues, Requirements, Framework and Specifications” Prabhat Kumar Tiwary, Quang-Dung Ho, Tho Le-Ngoc, McGill University|
|“Aurora: A Virtualization and Software-Defined Infrastructure Framework for Wireless Networks” Prabhat Kumar Tiwary, Kevin Han, Hoai-Phuoc Truong, Quang-Dung Ho, Tho Le-Ngoc, McGill University|
|“Full-duplex WiFi Analog Signal Transmission with Digital Signal Downlink in Radio-over-Fiber System Employing RSOA-based WDM-PON Architecture” An T. Nguyen, Zhihui Cao, Leslie A. Rusch, Université Laval|
|“An Application of Aurora with 802.11 wireless networks and Flow-based Virtualization” Mahsa Hoai-Phuoc Truong, Kevin Han, Prabhat Kumar Tiwary, Quang-Dung Ho, Tho Le-Ngoc, McGill University|
Mahsa Derakhshani, Xiaowei Wang, Tho Le-Ngoc, McGill University, Alberto Leon-Garcia, university of Toronto
In virtualized 802.11 networks, it is challenging to provide service customization and fairness across multiple service providers, who share physical infrastructure and network capacity. This is mainly because of using CSMA-based MAC, which couples flows of different virtual WLANs due to unavoidable collisions. In a dense WLAN deployment, association control can facilitate a solution to control fairness and throughput among different ISPs. In this work, STA-AP association control is investigated and an optimization problem is formulated aiming to maximize overall network throughput while providing air time guarantee for each ISP. Subsequently, an algorithm is developed to reach the optimal solution by applying monomial approximation and using geometric programming iteratively.
Vikas Jumba, Saeideh Parsaei Fard, Mahsa Derakhshani, Tho Le-Ngoc, McGill University
Wireless network virtualization is a promising paradigm to increase the spectrum efficiency via allocating bundles of physical-layer resources (e.g., power and spectrum) to different service providers, referred to as slices. In this work, to efficiently utilize resources between slices, we propose a resource allocation algorithm by maximizing the total throughput of virtualized wireless network (VWN), while preserving a minimum required quality of service (QoS) for each slice. Due to the channel variations, VWN always encounters outage probability, i.e., the QoS does not hold. To prevent this issue, we present a dynamic admission control algorithm. Via simulation results, we demonstrate the performance of our proposed algorithms.
Prabhat Kumar Tiwary, Quang-Dung Ho, Tho Le-Ngoc, McGill University
Virtualization of wireless infrastructures furnishes a rich variety of abstracted and sharable wireless resources encompassing different wireless technologies and standards. On the other hand, the service-oriented architecture model is affecting the tenant ecosystem by allowing tenants to own, share, borrow and manage the virtual wireless resources in many desirable ways. The setup and management of such diverse virtual resources are non-trivial. Moreover, supporting service-oriented architecture and software-defined paradigm adds additional management complexity. In this regard, this poster first discusses the main existing and foreshadowed management issues. Next, the management requirements for a virtualized and software-defined wireless infrastructure are explored. In addition, a draft initial management framework along with a set of management specifications have been put forward. The framework and the specifications have been prototyped in Aurora (as Aurora-Manager and Aurora-Tenant), which is demonstrated through a flow-based application scenario.
Prabhat Kumar Tiwary, Kevin Han, Hoai-Phuoc Truong, Quang-Dung Ho, Tho Le-Ngoc, McGill University
This poster introduces Aurora, a virtualization framework and testbed platform for supporting multiple types of virtualization techniques and architectures specifically applied to wireless technologies. After a brief overview of the wireless virtualization perspectives, the Aurora resource abstraction model is discussed, and the software architecture and the design principles behind Aurora are explained. Next, the current deployment of Aurora within SAVI is outlined and the prospects of Aurora in supporting different virtualization perspectives and potential ways to extend to different wireless technologies are sketched.
Truong An Nguyen and Leslie Rusch, Unversité Laval
We experimentally demonstrate bidirectional analog WiFi signal transmission in a digital wavelength division multiplexing passive optical network system employing reflective semiconductor optical amplifier (RSOA). A downlink (DL) signal comprising a 1 Gb/s On-Off Keying (OOK) and a WiFi signal is transmitted simultaneously with an uplink (UL) WiFi signal. The DL optical carrier is reused by the RSOA for UL transmission. We transmit pass-band WiFi signals at 2.4 GHz band without frequency translation even though the RSOA’s response is limited at 1.2 GHz. At the bit-error-rate (BER) threshold of 2.10-3 before forward error correction (FEC), we achieve the transmission link up to 20 km (64-QAM), 30 km (16-QAM), and 40 km (QPSK). In all cases, the 1 Gb/s digital downlink signal is always error-free.
Hoai-Phuoc Truong, Kevin Han, Prabhat Kumar Tiwary, Quang-Dung Ho, Tho Le-Ngoc, McGill University
This demonstration presents an application of the Aurora framework in a healthcare setting using the IEEE 802.11 wireless technology and flow-based virtualization. A centralized management topology is used with the Aurora-Manager running on an Ubuntu 12.04 laptop and Aurora-Agents on the PC engines. A key feature demonstrated is flexible ap-slice setup and management using Aurora APIs through Aurora-Client dashboard. It is shown that ap-slices can share the same physical AP. Similarly, the advantage of Aurora resource abstraction model (specifically wnet) in joint management of ap-slices is showcased. With regard to this scenario, some relevant management statistics such as the status of a slice for the purpose of billing are also shown. Finally, the internal management steps such as environment variable setup, API calls, parsing, conflict management, resolution, database queries, message queuing, AP polling, status reporting, database updates and response generation for the user (tenant) while execution of an Aurora command is explained with the help of a timeline diagram.