Open issues on TCP for mobile computing

Tsaoussidis, Vassilis; Matta, Ibrahim

doi:10.1002/wcm.30

Cited by 102 publications

(44 citation statements)

References 40 publications

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“…We see that the proposed algorithm is tolerant against random, transient errors caused by wireless, fading channels. MR-AIMD accelerates transmission faster than conventional AIMD, becoming more aggressive, when conditions permit, which is another desirable property in case of wireless errors [12]. Indeed, we see in …”

Section: Wireless Networkmentioning

confidence: 90%

Why Rely on Blind AIMDs?

Psaras

Dianati

Tafazolli

2009

Lecture Notes in Computer Science

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We are motivated by the fact that fixed Increase rates and Decrease ratios for AIMD cannot adjust TCP's performance to the Internet's diverse networking conditions. Indeed, we find that fixed values for the increase/decrease factors of AIMD restrain flexibility, which is a fundamental property of transport protocols in order to guarantee utilisation and fairness in Modern and Future Internetworks. We propose a new paradigm for AIMD designs that has the potential to adjust TCP's behaviour according to network conditions. The proposed Multi-Rate AIMD increases additively the Additive Increase factor of AIMD when the level of network contention is low and decreases multiplicatively (the AI factor) on the face of triple duplicate ACKs or timeout expirations. The Multiplicative Decrease factor of AIMD remains constant in order to guarantee fairness and stability. We show that MR-AIMD reduces retransmission effort significantly, when contention is high, becomes aggressive when contention decreases and tolerates against random, transient errors due to fading channels.

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Section: Wireless Networkmentioning

confidence: 90%

Why Rely on Blind AIMDs?

Psaras

Dianati

Tafazolli

2009

Lecture Notes in Computer Science

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“…Energy consumption: In mobile environments, the energy consumption for the mobile end-node can be a key metric that is affected by the transport protocol [TM02].…”

Section: Robustness For Challenging Environmentsmentioning

confidence: 99%

Metrics for the Evaluation of Congestion Control Mechanisms

Floyd¹

2008

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“…That is, the sender and receiver are connected via wired and wireless networks, and data transmission is done from the wired network hosts to wireless network hosts by using Transmission Control Protocol (TCP) [2], the most popular transport-layer protocol in the current Internet. However, it is a well-known problem that the performance of TCP deteriorates significantly when a TCP connection traverses wired and wireless heterogeneous networks [3], [4]. TCP was originally designed for wired networks, so it regards all packet losses detected at the TCP sender as losses caused by network congestion: the result of buffer overflow of the intermediate routers.…”

Section: Introductionmentioning

confidence: 99%

Receiver-Based ACK Splitting Mechanism for TCP over Wired/Wireless Heterogeneous Networks

Hasegawa

Nakata

Nakano

2007

IEICE Transactions on Communications

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SUMMARYWith the rapid development of wireless network technologies, heterogeneous networks with wired and wireless links are becoming common. However, the performance of TCP data transmission deteriorates significantly when a TCP connection traverses such networks, mainly because of packet losses caused by the high bit error rate of wireless links. Many solutions for this problem have been proposed in the past literature. However, most of them have various drawbacks, such as difficulties in their deployment by the wireless access network provider and end users, violation of TCP's end-to-end principle by splitting the TCP connection, or inapplicability to IP-level encrypted traffic because the base station needs to access the TCP header. In this paper, we propose a new mechanism without such drawbacks to improve the performance of TCP over wired and wireless heterogeneous networks. Our mechanism employs a receiver-based approach, which does not need modifications to be made to the sender TCP or the base station. It uses the ACK-splitting method for increasing the congestion window size quickly in order to restrain the throughput degradation caused by packet losses due to the high bit error rate of wireless links. We evaluate the performance of our mechanism and show that our mechanism can increase throughput by up to 94% in a UMTS network. The simulation results also show that our mechanism does not significantly deteriorate even when the receiver cannot perfectly distinguish whether packet losses are due to network congestion or bit errors on the wireless links.

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Open issues on TCP for mobile computing

Cited by 102 publications

References 40 publications

Why Rely on Blind AIMDs?

Why Rely on Blind AIMDs?

Metrics for the Evaluation of Congestion Control Mechanisms

Receiver-Based ACK Splitting Mechanism for TCP over Wired/Wireless Heterogeneous Networks

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