TCP performance in multi-hop wireless ad hoc networks: challenges and solution

Al-Jubari, Ammar Mohammed; Othman, Мohamed; Ali, Borhanuddin Mohd; Hamid, Nor Asilah Wati Abdul

doi:10.1186/1687-1499-2011-198

Cited by 46 publications

(26 citation statements)

References 45 publications

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“…PROPOSED SOLUTION: HYBRID TCP As shown before, the TCP is not really compatible with wireless networks, because of the fact that TCP consider all packets loss as congestion and degrade the network performances. Therefore in order to solve this problem of compatibility several approaches have been proposed [1], [2], [3], [8], [9], [10], [11]. Most of these approaches use a cross layer solution which is an escape from the pure waterfall-like concept of the OSI communications model with virtually strict boundaries between layers.…”

Section: B Rtt Methodsmentioning

confidence: 97%

A cross layer solution to improve TCP performances in Ad Hoc wireless networks

Douga

Bourenane

2013

2013 International Conference on Smart Communications in Network Technologies (SaCoNeT)

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We present in this paper a novel approach to improve TCP performance in the mobile wireless networks (MANET). The proposed protocol, designated as HYBRID TCP, is essentially an extension of the original IEEE 802.11 standard and the TCP-Reno protocol. By making some modifications using a cross layer solution to the legacy IEEE 802.11 MAC and TCP-Reno protocol, HYBRID TCP provides a significant improvement in the performance of TCP in multi-hop wireless environments by taking in consideration the mobility of nodes, the interferences and solves the problem of multi-hops. The performance of HYBRID TCP is compared to that of standard TCP-Reno scheme and to a recent improvement of TCP performed on the basis of the signal strength in terms of achieved effective throughput and of transmission time. The numerical results reveal that HYBRID TCP achieves a significant improvement in the TCP transmission performance over mobile multi-hop wireless networks.

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Section: B Rtt Methodsmentioning

confidence: 97%

A cross layer solution to improve TCP performances in Ad Hoc wireless networks

Douga

Bourenane

2013

2013 International Conference on Smart Communications in Network Technologies (SaCoNeT)

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“…Thus, the accuracy of BDP is a key influencing factor to the effectiveness of TCP. In wireless ad hoc networks, it is difficult to get the precise value of BDP and TCP encounters a mass of problems [2] [3] due to wireless channel contention and route instability, moreover, the real BDP is much smaller than that in wired networks.…”

Section: Introductionmentioning

confidence: 98%

TCP congestion control based on accurate bandwidth-delay product in wireless Ad hoc networks

Zhang

Yang

2014

2014 23rd International Conference on Computer Communication and Networks (ICCCN)

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Bandwidth-delay product (BDP) is an important indicator of the network capacity and usually used to measure the quality of a connection. In wireless ad hoc networks over IEEE 802.11, packets may be blocked due to link layer contention, and delay triggered by the contention called contention delay has been revealed has nothing to do with BDP. BDP in wireless ad hoc networks has been studied a lot to improve the transmission control protocol (TCP) performance, however, in the calculation of BDP, most of the previous studies neglected to remove the contention delay and thus obtained an overestimated value which may cause congestion window (CWND) overshooting problem. In this paper, we propose a new method to accurately measure the congestion delay which is the effective "delay" of BDP and calculate more accurate BDP. Then, based on the BDP, we set suitable congestion window limit (CWL) to alleviate the CWND overshooting problem and enhance TCP performance. Simulation results show that TCP with CWL based on our accurate BDP works more efficiently.

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“…TCP sender estimates RTT as the difference in packet sending time and the time at which corresponding TCP-ack is received. In wireless networks, the quality of the radio link can fluctuate greatly in time because of channel fading, interference, and mobility [15,16]. It is believed that the RTT correctly infers congestion in the end-to-end network path.…”

Section: Introductionmentioning

confidence: 99%

Refining TCP's RTT dependent mechanism by utilizing link retransmission delay measurement in Wireless LAN

Dalal

Sarkar

Kothari

et al. 2015

Int J Communication

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Network utilization by legacy transmission control protocol (TCP) is determined by its round trip time (RTT) dependent mechanism for the growth of its sending rate. The RTT does not always reflect the actual network conditions, especially in the case of wireless local area network (WLAN). Consequently, it influences the RTT-dependent mechanism falsely. This paper proposes a novel cross-layer scheme between TCP and the Institute of Electrical and Electronics Engineers (IEEE) 802.11 medium access control (MAC) that compensates for any diminished growth of TCP's sending rate because of the inclusion of non-congestion delay component in RTT, if any. The proposed scheme has two refinements. The first refinement is at the MAC layer that notifies the additional propagation delay on account of link retransmission of a TCP packet. The second refinement is at the TCP layer in which the sender adapts the sending rate by relating the aforementioned additional propagation delay to the RTT estimation. To examine the benefits, the proposed scheme is evaluated after implementing it on top of representative TCP variants; Newreno and Westwood+ (TCPW). Simulation results showed that with the proposed scheme, network utilization by native TCP is improved by more than 35% in a dedicated WLAN environment, while the performance remained protected in a shared WLAN environment.

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TCP performance in multi-hop wireless ad hoc networks: challenges and solution

Cited by 46 publications

References 45 publications

A cross layer solution to improve TCP performances in Ad Hoc wireless networks

A cross layer solution to improve TCP performances in Ad Hoc wireless networks

TCP congestion control based on accurate bandwidth-delay product in wireless Ad hoc networks

Refining TCP's RTT dependent mechanism by utilizing link retransmission delay measurement in Wireless LAN

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