Content-oriented network slicing optimization based on cache-enabled hybrid radio access network

Abstract

With the development of smart mobile devices and various mobile applications, content-oriented service has become the most popular service which occupies network resources and results in high traffic load. In order to improve quality of experience in radio access network and reduce the OpEx and CapEx of operators, wireless network virtualization and network slicing come into the vision and are deemed as promising solutions to radio access networks to provide tailored services. Therefore, network slicing and optimization based on content-oriented service become a challenging research direction. In this paper, network slicing and resource optimization on content-oriented application in cache-enabled hybrid radio access network based on complex network are investigated. A Cooperative Network Slicing Framework Based on Content in RAN (CNSC-RAN) is presented. Based on CNSC-RAN, procedures of content-oriented static network slicing and dynamic slicing are proposed. Content-oriented slicing is modeled and analyzed which includes slicing on content cache resources and communication resources. In order to obtain the optimized resources sliced for each content, the optimization problem is formulated to minimize the average system cost to get the contents required by users. The problem is solved by a heuristic algorithm called CCSOA (Content-Centric Slicing Optimization Algorithm) in a dynamic content-oriented network slicing procedure enabling UEs with self-evicting contents. The performance of CCSOA is evaluated by performance metrics including hit rate, average cache occupation, average system cost, and request traffic reduction to macro cell base station comparing with CEE and ProbCache. Simulation results reveal the effectiveness of CCSOA.

IVCN: Information-Centric Network Slicing Optimization Based on NFV in Fog-Enabled RAN

“…The average weighted hops is defined to measure the average weighted hops to get contents in physical content network on the data plane and that on the control plane, namely in (24) and (25), respectively: AWH CP = total_hops_CP total_req_num (24) AWH DP = total_hops_DP total_req_num (25) where total_hops_CP indicates the total weighted hops to meet all the user requests on the control plane, and total_hops_DP is the total weighted hops to forward the content in response to all the user requests on the data plane. Obviously, the average weighted hops can be regarded as the communication resources allocated for transmitting one content for every content request.…”

“…In [23] and [24], the joint resource allocation and content caching problem are formulated to utilize radio and content storage resources in the highly congested backhaul scenario, aiming at minimizing the maximum content request rejection rate of different mobile virtual network operators in different cells. In [25], in cache-enabled hybrid RAN, information-centric contentoriented slicing is modeled which includes slicing on content cache resources and communication resources. The optimization problem is formulated to minimize the average system cost to get the contents required by users.…”

“…Optimal partition of VNF component, function composition and networking orchestration on VNFs bring about not only gains on minimizing delay to get the content, but also gains on reducing the content forwarding bandwidth as well as content caching redundancy. On the basis of research works mentioned above, Liang et al [8], Wang et al [21], Zhou et al [22], Tran and Le [23], [24], Jin et al [25] only consider the resource slicing optimization in RAN without considering NFV and SFC from the respect of service provision in ICN. CDN slices based on SFC are investigated in detail in [4], [11]- [18], and [29], however, it is still a challenge on the research of orchestration and optimization from the respect of information-centric network and its service provision in fog-enabled heterogeneous RAN.…”

Methods of fomalization and simulation of telecommunication network using network slice

“…In this model, each network slice is associated with only one specific content and consists of two internal sub-sectors: a slice of caching and a slice of communication. Network slicing in this case is the process of creating and managing information-oriented slices for each content on top of the physical network infrastructure [7].…”