1. Performance Evaluation of Transport Protocols for Real-Time Supermedia - HEVC streams over the Internet
George Kokkonis, Kostas E. Psannis, Manos Roumeliotis
Dept of Applied Informatics, Univ. of Macedonia, Greece
Petros Nikopolitidis
Dept of Informatics Aristotle University of Thessaloniki, Greece
Yutaka Ishibashi
Dept of Computer Science , Nagoya Institute of Tech., Japan

2. System Architecture

3. Qos requirements QOS HAPTICS VIDEO AUDIO GRAPHICS JITTER (ms) ≤ 2 ≤ 30
DELAY (ms)
≤ 50
≤ 400
≤ 150 ≤
PACKET LOSS (%)
≤ 10
≤ 1
UPDATE RATE (Hz)
≥ 1000
≥ 30
≥ 50
PACKET SIZE (bytes)
64-128
≤ MTU
THROUGHPUT (Kbps)
Before we begin analyzing the flow control algorithm, it would be wise to compare the QoS Requirements for all Multimedia Streams. In the depicted table is understood that the haptic stream is a lot more sensible to jitter and delay than the other streams. In most circumstances the jitter should be lower to 2 ms and the delay should be lower to 50 ms. While video demands jitter lower to 30 ms and delay lower to 400 ms. Moreover the Update rate in most circumstances must be equal to 1000 packets per sec which is very demanding. This means that if the haptic packet size is 128 bytes the throughput is 1024 kbps, which is not very demanding compared to video throughput.

4. Transport Protocols Under Test
UDP
RTP
ETP
SCTP
DCCP

5. Metrics for Performance Evaluation
Delay,
Jitter,
Throughput,
Efficiency,
Packet loss,
Packet arrival deviation

6. Topology of NS2 with DelayBoxes and TMIX traffic.

7. Theoretical Efficiency
ETP
UDP
RTP
SCTP
DCCP
HEADER (bytes)
12+8(UDP) 8
12+4
(CHUNK INF.) 12
HAPTIC PAYLOAD (bytes) 64
EFFICIENCY
76.19%
88.88%
80%
84.21%

12. RESULTS
TCP, SCTP and DCCP do not perform well in heavily congested networks, as they are not designed for timely delivery of information.
UDP, ETP and RTP more suitable protocols for real-time applications.
UDP protocol is the lightest, fastest and most efficient protocol but without congestion control.
ETP is showing better behavior than UDP and RTP when the network is heavily congested.