Research On Key Technologies Of Information Centric Network Architecture For Future Space Exploration

With the development of space exploration,the types and number of space nodes will grow rapidly,and the transmission services will be more abundant.In addition to the traditional detection data,telemetry data and remote control data transmission,there will also be some emerging needs such as astronaut multimedia communication and man-machine cooperative communication.The DTN(Delay-Tolerant Networking)protocol can better solve the reliable transmission problem of long-delay and easily interrupted in the space detection network,but its transmission mode is relatively single.And the DTN Bundle Protocol(BP)does not support multiple sources Data transmission,it is difficult to achieve efficient data distribution,so the existing DTN architecture is difficult to fully meet the needs of future complex space detection.Information Centric Networking(ICN)takes information as the center,so that nodes are no longer restricted by location and they focus on supporting efficient data distribution.This paper proposes to apply the idea of ICN to the future space exploration network,and use its efficient publish/subscribe mechanism to adapt to the diversified node types and transmission services in the future space network.ICN's publish/subscribe mechanism brings diversified transmission methods,and also provides a working mechanism for separating the data plane and the control plane in SDN(Software Defined Networking),so it can improve network management capabilities.The unique caching mechanism of ICN allows other nodes in the network to cache copies of data so that the subscribing node can obtain the data nearby.Therefore,the utilization rate of the data is improved,and the efficiency of data acquisition is significantly improved.First of all,this article analyzes the development trend of space detection network and the problems that will be faced,introduces the applicability of ICN in the future space detection network,and proposes an architecture design plan for the future space detection network.The operating mechanism under the network architecture was formulated,and the feasibility of the ICN-based space exploration network architecture was tested through simulation.Secondly,this article selects the node that receives the publish/subscribe information as the controller to realize the decoupling of the control plane and the data forwarding plane.Because the deployment strategy of the controller plays a vital role in the architecture,this paper formulates the deployment strategy of the controller node,uses the simulated annealing algorithm to solve the position of the controller,and optimizes the efficiency of network data discovery.In the experimental scenario of the earth domain set in this paper,a simulation experiment was carried out using NS2 for the problem of the controller deployment strategy,and the controller deployment situation when the network performance was better was obtained.Finally,based on the entire network's operating mechanism and controller deployment strategy,this paper studies the routing adaptability of ICN applied to space exploration networks.The design and simulation experiments of routing strategy were carried out for the overall scene of the cross-planetary domain and the near-Earth planetary domain scene.It is verified that the improved routing strategy can better adapt to the space detection network with dynamic changes in the topology,reduce the data transmission delay,and improve the efficiency of data acquisition.