| 1. |
- Hurtig, Per, 1980-, et al.
(författare)
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Impact of TCP BBR on CUBIC Traffic : A mixed workload evaluation
- 2018
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Ingår i: Proceedings of the 30th International Teletraffic Congress, ITC 2018. - : IEEE. - 9780988304550 ; , s. 218-226
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Konferensbidrag (refereegranskat)abstract
- A recently proposed congestion control algorithm (CCA) called BBR (Bottleneck Bandwidth and Round-trip propagation time) has shown a lot of promise in avoiding some of the problems that have plagued loss-based CCAs. Nevertheless, deployment of a new alternative algorithm requires a thorough evaluation of the effect of the proposed alternative on established transport protocols like TCP CUBIC. Furthermore, evaluations that consider the heterogeneity of Internet traffic sizes would provide a useful insight into the deployability of an algorithm that introduces sweeping changes across multiple algorithm components. Yet, most evaluations of BBR's impact and competitive fairness have focused on the steady-state performance of large flows. This work expands on previous studies of BBR by evaluating BBR's impact when the traffic consists of flows of different sizes. Our experiments show that under certain circumstances BBR's startup phase can result in a significant reduction of the throughput of competing large CUBIC flows and the utilization of the bottleneck link. In addition, the steady-state operation of BBR can have negative impact on the performance of bursty flows using loss-based CCAs over bottlenecks with buffer sizes as high as two times the bandwidth-delay product.
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| 2. |
- Pappas, Nikolaos, et al.
(författare)
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Network-level Cooperation in Random Access IoT Networks with Aggregators
- 2018
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Ingår i: PROCEEDINGS OF THE 2018 30TH INTERNATIONAL TELETRAFFIC CONGRESS (ITC 30). - 9780988304550 ; , s. 245-253
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Konferensbidrag (refereegranskat)abstract
- In this work, we consider a random access IoT wireless network assisted by two aggregators. The nodes and the aggregators are transmitting in a random access manner under slotted time, the aggregators use network-level cooperation. We assume that all the nodes are sharing the same wireless channel to transmit their data to a common destination. The aggregators with out-of-band full duplex capability, are equipped with queues to store data packets that are transmitted by the network nodes and relaying them to the destination node. We characterize the throughput performance of the IoT network. In addition, we obtain the stability conditions for the queues at the aggregators and the average delay of the packets.
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| 3. |
- Zhao, Peiyue, et al.
(författare)
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Time Constrained Service-aware Migration of Virtualized Services for Mobile Edge Computing
- 2018
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Ingår i: Proceedings of the 30th International Teletraffic Congress, ITC 2018. - : Institute of Electrical and Electronics Engineers (IEEE). - 9780988304550 ; , s. 64-72
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Konferensbidrag (refereegranskat)abstract
- We consider the migration of virtualized services (VSs) in Mobile Edge Computing (MEC), so as to facilitate server maintenance, load balancing under mobility, improved energy efficiency and resource utilization, and incident response. We consider a set of VSs that has to be migrated from a source placement to a target placement, while maintaining service continuity as much as possible. We formulate the VS migration problem as an integer programming problem, and analyze its complexity. We propose an efficient iterative algorithm for computing when and in what order the VSs shall be migrated among the MEC nodes. We evaluate the proposed solution in terms of total service value, efficiency, and scalability. Extensive simulations show that our algorithm is computationally effective, and performs close to optimal.
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