A Survey of Network Slicing in 5G

Qiang CHEN, Cai-Xia LIU
2017 DEStech Transactions on Computer Science and Engineering  
The traditional network is facing many problems, making its development in the bottleneck period. Data forwarding efficiency and resource utilization rate are very low, the structure is also complex, and the redundancy is not optimized [1] . In order to solve this problem, communication operators continue to develop communication technology, which is the fifth generation of mobile communication technology, then has been introduced the concept of network slicing, putting the network function
more » ... ualization and software defined networks into the network slicing [2] . The new network slicing technology in this paper can improve the network service capability and meet the needs of multi service development. Introduction The overall vision and performance requirements of the future 5G network have basically reached a consensus. From the point of view of access capability, it mainly includes higher data flow and user experience rate, mass terminal connection and lower delay [3] . This requires the network architecture has the following characteristics: more flat architecture, more efficient and more flexible content distribution network layout, more concise and more efficient mobility management, resource management, more secure network system, It also requires a higher experience rate and greater bandwidth access capability to support higher resolution, more experienced multimedia content. In the context of the Internet of things devices interconnection, 5G offers optimized signaling control capabilities for higher connectivity density, enabling efficient access and management of large-scale, low-cost, low-power IoT devices. For vehicle networking, emergency communications, industrial Internet applications such as scene verticals, 5G provides low delay and high reliability of information interaction, support interconnection between entities highly real-time, highly sophisticated and highly secure business cooperation [3] . Facing the ultimate experience, efficiency and performance requirements of 5G, as well as the vision of "all things on the Internet", the network faces new challenges and opportunities [3] . The network section which plays an important role in 5G, is from SDN, NFV and many other technologies to achieve a variety of requirements of 5G, to ensure that the 5G network can respond to changing business needs, especially the vertical industry business, end to end network section will provide the service assurance solutions. The network slicing architecture mainly consists of two functions, slice management and slice selection. Slice of the management function contacts with organic series business operations, virtual resource platform and network management system, for different sections of the demand side (such as vertical industry users, virtual operators and other business users) special logic network to provide with secure isolation, highly controlled. Brief Introduction to Network Slicing Network Slice Definition The network is a single slice of physical network into multiple logical virtual network, realizing resource allocation and process optimization of multiple network which were just perfect, sharing of network infrastructure, so as to improve the utilization rate of cyber source, to provide the best support for different users use different services [3] . It will form an end to end logical network, and 27 flexibly provide one or more network services according to the demand of slicing demand. It is a form of network sharing and a way of on-demand networking. For each network slice, proprietary resources such as virtual servers, network bandwidth, and service quality are fully guaranteed. Because the slices are isolated from each other, a slice of error or fault does not affect the communication of other slices. Key Technologies of Network Slicing: SDN and NFV Network slicing is the key feature of network function Virtualization (NFV) and software defined network (SDN) applied in the 5G phase. Therefore, SDN and NFV are key technical support for network slicing. Software Defined Network (SDN) Software defined network (SDN) as a new type of network architecture in the future, the network can be programmable and control and forwarding separation two features into the Internet and mobile communications and other fields, solving the problem existing in the network is not flexible and rigid, accelerate the new application in the network deployment and online [4] . The main function of SDN is the ability to control the network planning, open and flexible call forwarding separation, and centralized control, it can be forwarding plane and control plane separation of network equipment, flexible scheduling and control network traffic, network automation and intelligent [6] . The existing SDN architecture is mainly composed of three layers: Infrastructure (Layer), which contains a large number of basic network devices, and is responsible for the rule processing and data forwarding from the control layer. The control layer (Control Layer) of the layer is the core of the whole structure, responsible for data forwarding resource arrangement, network topology control, information collection etc. The application layer (application layer), as its name implies, contains a large number of application services that call resources through the northbound interface. The top layer is the application layer, the lower layer is the infrastructure layer, and the middle control layer is connected with the application layer and the infrastructure layer through the north interface and the South interface respectively. The three structures are shown in figure 1.
doi:10.12783/dtcse/csma2017/17318 fatcat:ghhizizkujgjjb7oefwgjmhh7y