Research And Implementation Of The Data Transmission Service In Distributed Heterogeneous Signal Processing Platform

With the rapid development of wireless communication technology,communication product updates faster and faster.Traditional hardware-based development mode has been unable to meet the market demand.Software defined radio has been a great success as a new way of development.The development of software defined radio has also promoted the development of high performance processing platform.A lot of general-purpose high-performance processing platforms have come out,such as,VPX and ATCA.Because communication is in various ways and there are greater differences between platforms and between processors in the same platform,it has important significance that studying a lightweight data transfer mechanism running on different equipments.Centering on the data transfer mechanism running on distributed heterogeneous signal processing platform,this paper researches on three key technologies: data transmission service model,control signal transmission service and network congestion control.The main work is as follows:1.According to the obvious differences between the hardware and diversity of communication model,a data transmission model based on multi-layer abstract is proposed.This model shields the differences between the hardware and between operating systems,through the hardware abstraction,driving abstraction and operating system abstraction.The network service layer designed on the idea of communication middleware makes the upper applications do not need to pay attention to the underlying implementation of communication.2.According to the problem that a large number of equipments and applications in distributed heterogeneous signal processing platform have high requirement of the control single transmission,a control signal transmission service mechanism is designed by using hierarchical control and publish/subscribe model.This mechanism is on the basis of the data transmission model which is based on multi-layer abstract.The control signal transmission service mechanism can achieve the effective equipment management and information reporting through diversification of the system setting and reporting model step by step.It also can provide the data transmission service for equipment health management through publish / subscribe model.3.According to the translation performance degradation,a multiple models queue management algorithm and a queue scheduling algorithm based on relative priority are proposed.Both of that are based on differentiated services.The multiple models queue management algorithm has faster response speed and can avoid buffer overflow by considering the queue length and queue delay.The queue scheduling algorithm based on relative priority can achieve the differentiated services and has a better fairness by considering priority and data remaining lifetime.4.This paper verifies the data transmission service model and algorithm proposed in the article by practical application and software simulation.It verifies the effectiveness of the data transmission model used in distributed heterogeneous signal processing platform by applications running on one processor and applications running on multiprocessor across platforms.Through the test of equipment and application management under different environment,it verifies the validity and reliability of the control signal transmission service mechanism.Through software simulations we can make sure that the multiple models queue management algorithm and the queue scheduling based on relative priority can avoid network congestion effectively,provide different services for different priority data quality assurance and,to some extent,improve the performance of data transmission.