Joint Route Selection and Split Level Management for 5G C-RAN

Abstract

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Slice Aware Baseband Function Placement in 5G RAN Using Functional and Traffic Split

“…Although, slicespecific delay requirements are not taken into account. In [8] and [5], functional split and baseband function placement decision is considered for RAN slices to maximize the degree of centralization without considering traffic splitting.…”

“…• No-TS: This strategy is based on [8] where no traffic splitting is considered while maximizing the centralization in the network. • Fixed-Max-Split: In this strategy, the highest functional split (Split-3) is selected as the fixed functional split option as it has the highest centralization factor.…”

“…Now, for the given slice s and functional split f , we find the processing nodes for the placement of its CU and DU. We select a processing node in the regional cloud to place the CU from the list of switchedon servers in a first-fit strategy (shown in lines [6][7][8][9][10][11][12]. If the switched-on servers are not able to place the CU, then a new server is activated.…”

“…Authors of [4] aim to minimize interference related issues by selecting functional split for base stations. Recent works like [8] and [5] assign different centralization values to different functional splits and maximize the centralization degree in the network by selecting proper functional split. However, further exploration is required on this topic as none of the previous works consider all the aforementioned factors together.…”

Multiservice Loss Models in C-RAN Supporting Compound Poisson Traffic

“…In the recent past, various 5G C-RAN aspects have been studied, including: (a) functional splits, dimensioning and capacity issues of the fronthaul network [8][9][10][11][12], (b) privacy and security challenges as well as detailed frameworks for potential security attacks and threats [13][14][15][16], (c) energy and cost saving issues together with energy saving operating strategies [3,[17][18][19][20] and (d) cooperation problems between different mobile network operators [21,22]. On the other hand, there exists a limited number of papers that investigate the quite interesting subject of MUs' call admission control in a 5G C-RAN and focus on proposing analytical algorithms (based on efficient and usually recursive formulas) for the computation of call blocking probabilities (CBP) [23][24][25][26][27][28].…”