Capacity Increase for Voice over IP Traffic through Packet Aggregation in Wireless Multihop Mesh Networks

Castro, Marcel Cavalcanti de; Dely, Peter; Karlsson, Jonas; Kassler, Andreas

doi:10.1109/fgcn.2007.81

Cited by 18 publications

(24 citation statements)

References 9 publications

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“…The works in [4,5] investigate the trade-off between the aggregated packet size and the mandatory delay introduced to assure that enough packets are accumulated in the queue for an optimized aggregation process. If the number of packets to be aggregated is not sufficient but a few packets are buffered in the queue long enough, then only packets with a queueing delay higher than a certain threshold are aggregated.…”

Section: Related Workmentioning

confidence: 99%

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A delay-aware packet prioritisation mechanism for voice over IP in Wireless Mesh Networks

Olariu

Fitzpatrick²,

Ghamri‐Doudane

et al. 2016

2016 IEEE Wireless Communications and Networking Conference

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Section: Related Workmentioning

confidence: 99%

“…The majority of these solutions focus on packet aggregation [1,2,3,4,5,6,7], which works by combining multiple small VoIP packets into a single WiFi frame before transmission, hence lowering the number of frame transmissions required, which further reduces the probability of collision.…”

Section: Introductionmentioning

confidence: 99%

A delay-aware packet prioritisation mechanism for voice over IP in Wireless Mesh Networks

Olariu

Fitzpatrick²,

Ghamri‐Doudane

et al. 2016

2016 IEEE Wireless Communications and Networking Conference

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“…These proposals can be grouped according to the TCP/IP layer they are applied. The proposals in [3], [5], [9], [10], [11], [16], [18], [23] work at the network layer. Proposals in [13], [17], [24], [26], on the other hand, work at the data link layer.…”

Section: Introductionmentioning

confidence: 99%

“…Proposals in [13], [17], [24], [26], on the other hand, work at the data link layer. The network layer aggregation proposals can be also classified as multi-hop ( [3], [5], [9], [10], [11], [16], [18]) or single-hop ( [23]). When considering multi-hop aggregation algorithms, they can be further divided according to the point of aggregation in the network, which can be end-to-end ( [5], [10], [11], [18]) or hop-by-hop ( [3], [5], [9], [11], [16]).…”

Section: Introductionmentioning

confidence: 99%

A Packet Aggregation Mechanism For Real Time Applications Over Wireless Networks

Filho

Caetano

Bordim

2012

IJNC

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This work presents a packet aggregation technique, named Holding Time Aggregation -HTA. HTA is tailored for real time applications whose data is carried over wireless network environments. At the center of HTA lies an elaborated packet holding time estimation, which makes HTA to be highly adaptable to the diverse link conditions of a wireless setting. Contrary to other proposals that consider fixed packet retention time, the proposed HTA uses an adaptable packet retention time to allow relay nodes to explore aggregation opportunities on a multi-hop path. The proposed mechanism was evaluated and compared to another prominent packet aggregation scheme. Simulation results have shown that the proposed mechanism is capable to keep jitter and total delay within application limits. Furthermore, HTA has shown to allow for substantial reduction on the number of packet transmissions as well as on the overall packet overhead. Savings in terms of packet transmissions reached nearly 80% in the evaluated scenarios. These results have shown that the proposed scheme is able to cope with varying network link capacity and strict application timing requirements. The empirical results have shown to be consistent with the analytical results.

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“…More recently, Destination based Aggregation (DA) was proposed where packets that have the same destination are aggregated and unicast to that destination [11], [17]. Previous works have used DA to improve back haul traffic in wireless mesh networks [17].…”

Section: B Packet Aggregationmentioning

confidence: 99%

Packet aggregation in multi-rate wireless LANs

Majeed

Abu-Ghazaleh

2012

2012 9th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks (SECON)

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Abstract-In CSMA networks, there is a significant overhead associated with each packet including header overhead and contention overhead. The high overhead problem is exacerbated because some of these overheads are required to be at the lowest data rate to ensure that all contending nodes can compete fairly. For applications where packets are small, such as Voice over IP (VOIP), this means that a majority of the available transmission time is wasted on overhead. Packet aggregation is one of the techniques that has been proposed to amortize the per-transmission overhead over multiple aggregated packets. However, existing heuristics are limited, often not considering multi-rate wireless MAC, or operation in a WLAN environment. In this paper, we first formulate the problem of optimal aggregation for a multi-rate CSMA MAC protocol and show that it is NP-Hard. We then propose two heuristics that solve the aggregation problem for multi-rate WLANs. The first, which we call Data Rate based Aggregation protocol (DRA), divides packets in the MAC queue into groups based on the data rate they are to be transmitted at. The algorithm aggregates packets in the same group and broadcasts the aggregated frame at the data rate of that group. Empirically, DRA achieves several fold increase in throughput compared to basic aggregation. DRA also achieves up to a 200% increase in the number of VoIP calls supported by a single 802.11g AP compared to using state of the art aggregation protocols. The second heuristic, which we call Data Rate based Aggregation with Selective Demotion (DRA-SD), enables cross data rate aggregation. Through preliminary evaluation, we show that selectively demoting packets can further improve performance.

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Capacity Increase for Voice over IP Traffic through Packet Aggregation in Wireless Multihop Mesh Networks

Cited by 18 publications

References 9 publications

A delay-aware packet prioritisation mechanism for voice over IP in Wireless Mesh Networks

A delay-aware packet prioritisation mechanism for voice over IP in Wireless Mesh Networks

A Packet Aggregation Mechanism For Real Time Applications Over Wireless Networks

Packet aggregation in multi-rate wireless LANs

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