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Towards a Low Latency Network-Slice Resistant to Unresponsive Traffic

Pinto, P. ; Mazandarani, A. ; Amaral , P. ; Bernardo, L.

Towards a Low Latency Network-Slice Resistant to Unresponsive Traffic, Proc IEEE International Symposium on Network Computing and Applications - NCA, Boston, United States, Vol. , pp. - , November, 2018.

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Abstract
This paper studies what mechanisms a network must
have to offer a very low-latency service to applications (featuring
a maximum end-to-end packet delay). We assume very concrete
requirements, not seen in the literature, that raise the challenge
level: i) applications might be unresponsive to traffic warnings
from the network; and ii) applications do not inform or require
any network resources, exactly as the Internet works today
(i.e., there is no admission control procedures). We present an
architecture/algorithm with a minimum of state information and
good scalability properties. Obviously, it is not applicable to the
wide Internet. Even more, the architecture is not TCP-friendly
(because control loops must be shorter than the Round Trip Time
(RTT) magnitudes and oscillations, and packet losses are higher).
Instead, it is appropriate to an end-to-end slice network based on
a virtualization of the physical network with independent queues
and line bandwidths. It is designed for interactive applications
and for certain real-time ones. We use plain backpressure control
supported by cooperation amongst the routers to isolate offending
traffic. We are particularly concerned in situations of very high
load, as they will be very common in the future. One objective is
to reach a predictable network behaviour that in the limit (heavy
network overload) is maintained, contrary to the current Internet.
In the future, new pace-based congestion control algorithms for
applications can be designed to take the most out of this type of
network.