Joint Optimization Qos And Security Of Wireless Communication Network

In today's Internet world,communication quality(QoS)and security are two controversial network services that are crucial throughout the network.First,the openness of wireless networks makes it easy for malicious eavesdroppers to listen to both sides of the communication through some technology.Among them,the importance of security mechanism is embodied in:1.security mechanisms are used to provide identity authentication;2.protect the information and ensure that the received information is not tampered with.Because of the vulnerability of wireless networks,we need to strengthen the security to communicate safely and accurately.The best way is to strengthen the level of encryption.However,this will inevitably occupy the limited resources of the network,resulting in the network delay increase,throughput decrease and other problems to reduce the quality of communication,and then increase the burden of network communication.And different encryption algorithms,different key length will make the encryption effect and the required resources are different,so we need to take these factors into account in modeling.Communication quality(QoS)provides better service capability for specified network communications.where the better service capacity refers to:1.Speed.Both sides of the communication that need to rely on the wireless network to exchange information generally have a distance interval,so we use the wireless network mainly to be able to overcome the distance to quickly transfer information;2.Accurate.Information sent by the communicating party is reproduced and forwarded to the intended party without changing the content.However,the security mechanism must be used in order for the communication quality to be accurate and safe,so the security and the communication quality are not independent of each other,so we cannot only consider one party alone,and the choice of the security mechanism affects the communication quality,and vice versa.We can see that there are resource management problems in communication quality and security,and there are conflicting sides in the limited resources.Communication quality requires the security mechanism to ensure proper service allocation and expense,but choosing the inappropriate security mechanism will reduce the overall performance of the system.For example,excessive security selection of long key length and too complex encryption algorithms will make the effective throughput smaller and the delay larger,while excessively seeking communication quality despises security,which will lead to the risk of eavesdropping,loss and tampering of information.At present,a large number of real-time,big data,differentiated applications and services have emerged.these applications have high requirements for communication quality and security,and many potential threats will increase substantially.therefore,joint consideration of communication quality and security is an important research issue.However,because there are conflicting aspects of communication quality and security,it is difficult to model them.The existing research work is to separate them or optimize them by game theory.This paper will consider the optimization of security and communication quality from the perspective of resource allocation.We divide the resources into two dimensions: space(bandwidth)and time(delay),consider the different demands of different applications for service quality and security,model the resources needed for service quality and security together,and then make it a general method,which is no longer limited to a particular instance.