Shin-ichi Kuribayashi
Department of Computer and Information Science, Seikei University, Japan
ABSTRACT
The use of Deep Packet Inspection (DPI) equipment in a network could simplify the conventional workload
for system management and accelerate the control action. The authors proposed a congestion control
method that uses DPI equipment installed in a network to estimate overload conditions of servers or
network lines and, upon detecting an overload condition, resolves congestion by moving some virtual
machines to other servers or rerouting some communication flows to other routes. However, since the
previous paper was focused on confirming the effectiveness of using DPI technology, it assumed some
restrictive control conditions.
This paper proposes to enhance the existing DPI-based congestion control, in order to dynamically select
an optimal solution for cases where there are multiple candidates available for: virtual machines to be
moved, physical servers to which virtual machines are to be moved, communication flows to be diverted,
and routes to which communication flows are to be diverted. This paper also considers server congestion
for cases where computing power congestion and bandwidth congestion occur simultaneously in a server,
and line congestion for cases where the maximum allowable network delay of each communication flow is
taken into consideration. Finally, the feasibility of the proposed methods is demonstrated by an evaluation
system with real DPI equipment.
KEYWORDS
Deep packet inspection, congestion control, network, server
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