1 Introduction
2 Background and related work
3 Traffic characteristics
3.1 Voice/VOIP
Codec
|
Bit rate (kbps)
|
Packet size (bytes)
|
Packet interval (μs)
|
Inter-packet interval (ms)
|
---|---|---|---|---|
ITU G.711 | 64 | 284 | 2.27 | 20 |
364 | 2.91 | 30 | ||
ITU G.729 | 6.4 | 134 | 1.07 | 10 |
8 | 144 | 1.15 | 20 | |
11.4 | 154 | 1.23 | 30 |
3.2 Video streaming/IPTV
-
No ON-OFF cycles
-
Short ON-OFF cycles
-
Long ON-OFF cycles
3.3 Web-browsing
3.4 File-sharing
4 Proposed mechanism
4.1 Traffic and station prioritization
Traffic category
|
Station priority
|
Access point priority
|
---|---|---|
Voice | 0 | 0 |
Video | 2 | 1 |
Web-browsing | 4 | 3 |
Filesharing | 5 | 4 |
Network control | 6 | 6 |
4.2 Transmission styles
4.3 Adaptive TXOP limit
Traffic category
|
Relative TXOP limit
|
---|---|
Voice | Low |
Video | Highest |
Web-browsing | Moderate |
File-sharing | Moderately high |
Network control | Lowest |
5 Test and simulation environment
5.1 Simulation setup
5.2 Simulation topologies and parameters
Network topology
|
Traffic station distribution (number of stations)
|
---|---|
4-station | (1) Voice, (1) video, (1) web-browsing, (1) file-sharing |
5-station | (2) Voice, (1) video, (1) web-browsing, (1) file-sharing |
6-station | (2) Voice, (2) video, (1) web-browsing, (1) file-sharing |
7-station | (2) Voice, (2) video, (2) web-browsing, (1) file-sharing |
8-station | (2) Voice, (2) video, (2) web-browsing, (2) file-sharing |
9-station | (3) Voice, (2) video, (2) web-browsing, (2) file-sharing |