Analysis of TCP performance over mobile ad hoc networks
MobiCom '99 Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking
An analysis of short-term fairness in wireless media access protocols (poster session)
Proceedings of the 2000 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
ATP: a reliable transport protocol for ad-hoc networks
Proceedings of the 4th ACM international symposium on Mobile ad hoc networking & computing
Enhancing TCP fairness in ad hoc wireless networks using neighborhood RED
Proceedings of the 9th annual international conference on Mobile computing and networking
PE-WASUN '04 Proceedings of the 1st ACM international workshop on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks
TCP with adaptive pacing for multihop wireless networks
Proceedings of the 6th ACM international symposium on Mobile ad hoc networking and computing
Active capture of wireless traces: overcome the lack in protocol analysis
Proceedings of the third ACM international workshop on Wireless network testbeds, experimental evaluation and characterization
Wireless mesh networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
TCP/IP modeling and validation
IEEE Network: The Magazine of Global Internetworking
| Hi-index | 0.00 |
This paper analyzes TCP fairness in IEEE 802.11- based Wireless Mesh Networks (WMNs). Fairness of bandwidth sharing is important for equitable network access by various users. With our Indoor WMN testbed, we observe that even though TCP flows have similar round trip time and loss probability, they encounter an unfairness problem. Especially, when TCP flows experience high TCP ACK losses (around 20%), unfairness happens in a relatively long period (1∼100 seconds). We denote this phenomenon as a Semi-Long-Term Unfairness in the Same Path (SLU-SP) problem because it happens even when TCP flows share the same routing path. Additionally, we find out that the extended hidden terminal problem boosts up high TCP ACK losses and leads to a serious SLU-SP problem. Also, by carefully observing TCP dynamics through an active monitoring tool, PaPMo (Packet-accurate Protocol Monitor), we find out that the cause of SLU-SP problem comes from the cumulative ACK mechanism of TCP. Cumulative ACK makes TCP flows tolerable to few ACK losses, but when the TCP flows have different sizes of congestion window, the TCP flows have unfair bandwidth sharing in the relatively long period.