Server placement and assignment in virtualized radio access networks

Rashid Mijumbi, Joan Serrat, Juan Luis Gorricho, Javier Rubio-Loyola, Steven Davy

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

28 Citations (Scopus)

Abstract

The virtualization of Radio Access Networks (RANs) has been proposed as one of the important use cases of Network Function Virtualization (NFV). In Virtualized Radio Access Networks (VRANs), some functions from a Base Station (BS), such as those which make up the Base Band Unit (BBU), may be implemented in a shared infrastructure located at either a data center or distributed in network nodes. For the latter option, one challenge is in deciding which subset of the available network nodes can be used to host the physical BBU servers (the placement problem), and then to which of the available physical BBUs each Remote Radio Head (RRH) should be assigned (the assignment problem). These two problems constitute what we refer to as the VRAN Placement and Assignment Problem (VRAN-PAP). In this paper, we start by formally defining the VRAN-PAP before formulating it as a Binary Integer Linear Program (BILP) whose objective is to minimize the server and front haul link setup costs as well as the latency (or distance) between each RRH and its assigned BBU. Since the BILP could become computationally intractable, we also propose a greedy approximation for larger instances of the VRAN-PAP.

Original languageEnglish
Title of host publicationProceedings of the 11th International Conference on Network and Service Management, CNSM 2015
EditorsEdmundo Roberto Mauro Madeira, Joan Serrat, Jurgen Schonwalder, Corinna Schmitt, Mauro Tortonesi
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages398-401
Number of pages4
ISBN (Electronic)9783901882777
DOIs
Publication statusPublished - 28 Dec 2015
Event11th International Conference on Network and Service Management, CNSM 2015 - Barcelona, Spain
Duration: 09 Nov 201513 Nov 2015

Publication series

NameProceedings of the 11th International Conference on Network and Service Management, CNSM 2015

Conference

Conference11th International Conference on Network and Service Management, CNSM 2015
Country/TerritorySpain
CityBarcelona
Period09/11/201513/11/2015

Keywords

  • network function virtualization
  • resource assignment
  • server placement
  • virtualized radio access networks

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