TY  - RPRT
A1  - Brisch, Fabian
A1  - Kassler, Andreas
A1  - Vestin, Jonathan
A1  - Pieska, Marcus
A1  - Amend, Markus
T1  - Accelerating Transport Layer Multipath Packet Scheduling for 5G-ATSSS
T2  - KuVS Fachgespräch - Würzburg Workshop on Modeling, Analysis and Simulation of Next-Generation Communication Networks 2023 (WueWoWAS’23)
N2  - Utilizing multiple access networks such as 5G, 4G, and Wi-Fi simultaneously can lead to increased robustness, resiliency, and capacity for mobile users. However, transparently implementing packet distribution over multiple paths within the core of the network faces multiple challenges including scalability to a large number of customers, low latency, and high-capacity packet processing requirements. In this paper, we offload congestion-aware multipath packet scheduling to a smartNIC. However, such hardware acceleration faces multiple challenges due to programming language and platform limitations. We implement different multipath schedulers in P4 with different complexity in order to cope with dynamically changing path capacities. Using testbed measurements, we show that our CMon scheduler, which monitors path congestion in the data plane and dynamically adjusts scheduling weights for the different paths based on path state information, can process more than 3.5 Mpps packets 25 μs latency.
KW  - multipath packet scheduling
KW  - P4
KW  - MP-DCCP
KW  - 5G
KW  - ATSSSS
Y1  - 2023
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-322052
ER  - 
TY  - RPRT
A1  - Alfredsson, Rebecka
A1  - Kassler, Andreas
A1  - Vestin, Jonathan
A1  - Pieska, Marcus
A1  - Amend, Markus
T1  - Accelerating a Transport Layer based 5G Multi-Access Proxy on SmartNIC
T2  - Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22)
N2  - Utilizing multiple access technologies such as 5G, 4G, and Wi-Fi within a coherent framework is currently standardized by 3GPP within 5G ATSSS. Indeed, distributing packets over multiple networks can lead to increased robustness, resiliency and capacity. A key part of such a framework is the multi-access proxy, which transparently distributes packets over multiple paths. As the proxy needs to serve thousands of customers, scalability and performance are crucial for operator deployments. In this paper, we leverage recent advancements in data plane programming, implement a multi-access proxy based on the MP-DCCP tunneling approach in P4 and hardware accelerate it by deploying the pipeline on a smartNIC. This is challenging due to the complex scheduling and congestion control operations involved. We present our pipeline and data structures design for congestion control and packet scheduling state management. Initial measurements in our testbed show that packet latency is in the range of 25 μs demonstrating the feasibility of our approach.
KW  - Datennetz
KW  - multipath
KW  - MP-DCCP
KW  - 5G-ATSSS
KW  - networking
KW  - dataplane programming
KW  - P4
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-280798
ER  -