Experimental Evaluation of YouTube Performance on MPTCP-based LTE-WLAN Integration
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1 Experimental Evaluation of YouTube Performance on MPTCP-based LTE-WLAN Integration Shashwat Kumar, Himank Gupta, and Dr. Antony Franklin A. NeWS Lab Department of Computer Science and Engineering Indian Institute Of Technology, Hyderabad IEEE ANTS 2017, Bhubaneswar, India
2 Overview 1 Introduction to MPTCP 2 Working of MPTCP Proxy 3 Motivation 4 Contribution 5 Results 6 Conclusions NeWS Lab IIT Hyderabad 2/14
3 Introduction - Multipath TCP (MPTCP) Figure 1: An overview of MPTCP stack. MPTCP connection is formed of multiple TCP subflows, with coupled congestion control and shared receive buffer. Subflows have contiguous sequence numbering. Data is reassembled by connection-level sequence numbering. MPTCP can retransmit failures on original or new path. NeWS Lab IIT Hyderabad 3/14
4 MPTCP Proxy Measurments WiFi Network User Device MPTCP Proxy Ethernet/Fiber Connetction Internet Wireless Link Cellular Network Figure 2: System architecture to enable MPTCP with an MPTCP proxy server between UE and content server. Figure 3: MPTCP proxy mechanism. NeWS Lab IIT Hyderabad 4/14
5 Motivation Global data traffic will reach 49 Exabytes per month by 2021 and 78% of total mobile data traffic will be video data [1]. Expanding network capacity may temporarily mitigate the network congestion! Data offloading to other network (WiFi) can help. Multipath TCP (MPTCP) enables the parallel use of Multiple Network Interface (Cellular, WiFi). WiFi does not guarantee the QoS. How MPTCP effects the QoE for video services!!! NeWS Lab IIT Hyderabad 5/14
6 Contribution We develop a web application to measure QoE for YouTube videos in a multi-homed UE. Evaluation of LWI using MPTCP proxy in a real test-bed using open source platform for LTE. Performance evaluation of LWI using MPTCP for UHD videos in term of Mean Opinion Score (MoS) compared to when LTE or Wi-Fi used alone. NeWS Lab IIT Hyderabad 6/14
7 LTE Band 7 Testbed Setup QoE Measurments n (2.4 GHz) Wi-Fi Access Point Ethernet (1Gbps) MPTCP Proxy Server Ethernet (1Gbps) USB Tethering Ethernet (1Gbps) Nexus 5 RF Front (USRP-B210) Internet OAI enb USB 3.0 OAI LTE Testbed Ethernet (1 Gbps) Figure 4: OAI LTE test-bed setup showing LTE enb connected with USRP B210 RF front, EPC, MPTCP proxy, and UE. NeWS Lab IIT Hyderabad 7/14
8 Performance Metrics Mean Opinion Score (MoS) [2] MOS = L ti L fr L tr Initial Buffer Time Time taken to start the video playback. Time to buffer the last byte Time taken to buffer the complete video. Data Split How much data is send over LTE and WiFi. NeWS Lab IIT Hyderabad 8/14
9 Results: Data Over Wi-Fi Data Over LTE 5 For 4K-Videos For 2K-Videos 80 4 Percentage of Data MoS Experiments (a) 0 Wi-Fi LTE LTE+WLAN Wi-Fi LTE LTE+WLAN Network Connections (b) Figure 5: (a) Percentage of data sent over Wi-Fi and LTE for LWI, (b) Value of MOS for LWI, LTE, and Wi-Fi for 4K and 2K videos. NeWS Lab IIT Hyderabad 9/14
10 Results: Avg. Intial Load Time (Sec) Wi-Fi LTE LTE+WLAN Time (Sec) Wi-Fi LTE LTE+WLAN 0 4K-Video 2K-Video Video Resolution 15 4K-Video 2K-Video Video Resolution (a) (b) Figure 6: (a) Average initial load time for 4K and 2K videos using LWI, LTE, and Wi-Fi, (b) Average time taken to buffer the complete video. NeWS Lab IIT Hyderabad 10/14
11 Conclusions User QoE for videos can be improved using MPTCP. MPTCP can be used to facilitate the LWI. MPTCP proxy can be employed in the operator s network to enable MPTCP based LWI. MPTCP can be deployed without any change required in network. NeWS Lab IIT Hyderabad 11/14
12 References Cisco Visual Networking Index, Global mobile data traffic forecast update, , white paper, February R. K. P. Mok, E. W. W. Chan, and R. K. C. Chang, Measuring the quality of experience of HTTP video streaming, in 12th IFIP/IEEE International Symposium on Integrated Network Management (IM 2011) and Workshops, pp , NeWS Lab IIT Hyderabad 12/14
13 Thank You NeWS Lab IIT Hyderabad 13/14
14 Queries? Website : ID: cs15resch11011@iith.ac.in NeWS Lab IIT Hyderabad 14/14
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