Hardware Validation For Indentifer Mapping Based On GEM Frame Structure

Optical access network technology has substantial advantages such as wide bandwidth, low error rate, high reliability and stable performance. It has become the main access network technology solutions in recent years, including the GPON technic, which has sprung up everywhere nowadays. However, only by investigating the amount of data transmission does not meet the general requirement from people who access the service. Some problems like network security, mobility, manageability and controllability and many other issues are still awaiting resolutions. The intelligence collaborative network aims at a fundamental study of the present and future networks, and questions like how to deal with these challenges. Therefore, the combination of the GPON technic and the intelligence collaborative network becomes important.This article uses a programmable system on chip SOPC hardware as the development platform, and combines the identity mapping technic of the intelligence collaborative network in the network integration into the GPON and GEM frame encapsulation structures. It achieves a map-based identity verification system of GEM frame structure, and provides an advanced validation for possibility of combining the GPON technic and intelligence collaboration network. Details are as follows:Firstly, it briefly introduces the research progress of recent optical access network technology and the identity and location separation technology. A new application requirement is put forward, based on a careful analysis of the needs of the identity mapping technology principle and the implementation process, as well as a detailed analysis of GEM frame structure and framing works.Secondly, based on the characteristics of GEM frame structure and identity mapping technology, it points out the main choice given the system and the corresponding design, which includes verifying the mapping system, mapping mode selection and mapping storage problems. It also discusses about the overall function of each part of the mapping, which also appears in the program analysis problems and proposed solutions. It solves the verification system design, system stack modules, Ethernet communication module, identity mapping module, GEM frame structure and framing modules, functional analysis and hardware logic design.Thirdly, using the FPGA Development Platform, we achieve a verification system based on the identity mapping technology GEM frame structure. Additionally, we introduce in detail the hardware environment of the system, software configuration, and driver design and implementation. LWIP protocol transplant in the hardware development platform is also successfully implemented. Using a serial data link layer on top of the IP transport protocol, we simulate GEM frame transmission process to achieve GEM frame structures, Ethernet packet encapsulation technology, GEM frame serial transmission as well as GEM frame header checksum function. Furthermore, Netcom layer Ethernet communication mechanism and mapping module functions are accomplished. For a single test function of the system, we also realize the application layer server functionality.Finally, we build the appropriate network environment, and test the function block of the verification system. Block function testing system is mainly carried out for four parts:Ethernet communications, FPGA serial communication, mapping module and GEM packet encapsulation. We can conclude that the test results meet the design expectation. The test results show that the verification system designed in this paper is consistent with the predicted effect of the identity mapping function not only in resoundingly simulating the GEM frame structures, but also in the ability of correct transmission of data packets.