Title | ||
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Performance evaluation of a C-RAN supporting a mixture of random and quasi-random traffic |
Abstract | ||
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In this paper we consider a cloud radio access network (C-RAN) where the remote radio heads (RRHs) are separated from the baseband signal processing servers, named baseband units (BBUs). The latter forms a centralized pool of high-performance data center resources. To benefit from network function virtualization, we consider virtualized BBU (V-BBU) resources where the BBU functionality and services have been virtualized in the form of virtual network functions. All RRHs in the C-RAN form a single cluster. Each RRH of such a cluster may accommodate random or quasi-random traffic. That means that new calls in a RRH can be generated by an infinite number of mobile users (random traffic) or by a finite number of mobile users (quasi-random traffic). An arriving call requires a radio resource unit from the serving RRH and a computational resource unit from the V-BBU. If these resource units are available, then the call is accepted and remains in the system for a generally distributed service time. Otherwise, the call is blocked and lost. In order to analyze this C-RAN we model it as a loss system and study two cases: (i) all RRHs accommodate quasi-random traffic and (ii) some RRHs accommodate random traffic and the rest accommodate quasi-random traffic. In both cases, we show that the steady state probabilities have a product form solution and propose convolution algorithms for the accurate determination of the main teletraffic performance measure which is congestion probability. The accuracy of these algorithms is verified via simulation. |
Year | DOI | Venue |
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2020 | 10.1007/s11276-020-02301-7 | WIRELESS NETWORKS |
Keywords | DocType | Volume |
Cloud,Radio access,Call blocking,Product form,Quasi-random | Journal | 26.0 |
Issue | ISSN | Citations |
6 | 1022-0038 | 0 |
PageRank | References | Authors |
0.34 | 0 | 4 |
Name | Order | Citations | PageRank |
---|---|---|---|
Iskanter-Alexandros Chousainov | 1 | 0 | 2.03 |
Ioannis D. Moscholios | 2 | 318 | 33.14 |
Alexandros Kaloxylos | 3 | 9 | 2.25 |
Michael Logothetis | 4 | 1 | 1.11 |