Service Level Agreements for Communication Networks: A Survey
Ayyoub Akbari-Moghanjoughi, Jos\'e Roberto de Almeida Amazonas,, Germ\'an Santos-Boada, Josep Sol\'e-Pareta

TL;DR
This survey reviews current concepts, models, and open problems in establishing and managing Service Level Agreements (SLAs) in communication networks, emphasizing broader service quality beyond traditional QoS parameters.
Contribution
It provides a comprehensive overview of SLA methodologies, identifies research gaps, and discusses future directions for developing generic SLA frameworks considering all quality parameters.
Findings
Categorization of SLA methodologies
Identification of research gaps in SLA development
Discussion of future research directions
Abstract
Information and Communication Technology (ICT) is being provided to the variety of end-users demands, thereby providing a better and improved management of services is crucial. Therefore, Service Level Agreements (SLAs) are essential and play a key role to manage the provided services among the network entities. This survey identifies the state of the art covering concepts, approaches and open problems of the SLAs establishment, deployment and management. This paper is organised in a way that the reader can access a variety of proposed SLA methods and models addressed and provides an overview of the SLA actors and elements. It also describes SLAs' characteristics and objectives. SLAs' existing methodologies are explained and categorised followed by the Service Quality Categories (SQD) and Quality-Based Service Descriptions (QSD). SLA modelling and architectures are discussed, and open…
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Taxonomy
TopicsService-Oriented Architecture and Web Services · Software-Defined Networks and 5G · Software System Performance and Reliability
