Abstract
With the development of new satellite payload technology, in order to improve the utilization of system resources, research is based on software-defined network (SDN) and network function virtualization (NFV) gateway architecture. Based on this architecture, the system realizes global resource management and overall data distribution, which can solve the problem of resource allocation and maximum/minimum rate guarantee between different VNO terminals under different beams, different gateways, and different satellites. For this, a global bandwidth management method can be used which is mainly a process of management to control the traffic on a communication link. The proposed global resource management and control method can be based on the rate guarantee value of the VNO/terminal configured in the system as the basic limiting condition and reallocate the rate guarantee value limiting parameter according to the resource application status of the online terminal. The method can maximize the resource utilization of the entire satellite communication system and satisfy the resource request of the user terminal as much as possible.
Highlights
With the increasing demand for network communication and the development of satellite communication technology, the future communication network will be composed of satellite communication network and ground communication network
Depending on the CIR and MIR configuration to a particular VNO, the minimum and maximum bandwidth distributed to actual VNO have not exceeded the global bandwidth subscription at a system level limited. ese results show that the proposed method is very efficient for bandwidth distribution and to maximize utilization of the satellite network capacity
Erefore, a virtualization-based Sat-C-RAN architecture is proposed. e C-RAN network architecture effectively realizes the sharing of baseband resources between gateway through the centralized processing and allocation of baseband resources, so as to improve the utilization of baseband resources. e number of baseband resources required is reduced, and the system construction cost and energy loss during operation are effectively reduced. e resources of satellite communication system are limited
Summary
With the increasing demand for network communication and the development of satellite communication technology, the future communication network will be composed of satellite communication network and ground communication network. Due to the characteristics of VHTS, VNO terminals may be distributed in different geographical regions, corresponding to different satellite beams and gateways. Erefore, for distributed multigateway and multibeam systems, how to ensure the QoS guarantee requirements of terminal group consistency will be a key technology. Based on the virtualization technology of satellite gateway, this paper constructs a new cloud gateway architecture, realizes the overall resource allocation function of the whole network, and solves the problem of global bandwidth management of satellite communication system. NFV/SDN and other key technologies can be used to play a prominent role in satellite-ground integration, focusing on solving the problem of satellite-ground segmentation of network functions [4]. It solves many problems due to the uneven geographical distribution of users, the tidal effect of users’ all day network access time distribution, and the unequal resource usage of different gateways.
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