Novel Slice Admission Control Scheme with Overbooking and Dynamic
Buyback Process
Abstract
The emergence of 5G systems brought to fore the importance of network
slicing (NS) as it allows infrastructure providers (InPs) to create
logical networks (slices) and virtually share network resources to their
tenants. However, due to the limited resources of the InP, the resource
management algorithms like resource allocation and admission control are
required to ensure efficient management of these scarce resources.
Indeed, admission control algorithms play a critical role of regulating
access to the network, by determining whether a slice request should be
accepted or not with respect to some standards such as maximizing the
InP’s revenue and maintaining service level agreements (SLAs). In this
paper, we propose an admission control algorithm that employs the
concept of overbooking to admit slice requests beyond the InP’s nominal
available resources. Moreover, we employ a dynamic queue adaption
priority, step-wise pooling and dynamic buyback price mechanism to
ensure efficient and profitable admission decision for the InP. We
assess the performance of the proposed algorithm against state of the
art (SOTA) solution considering different priority schemes. The results
show that the proposed solution outperforms the SOTA solution as it
yields i) higher revenue, ii) lower buyback cost and iii) higher net
revenue for the InP while still maintaining a marginally higher slice
acceptance rate.