The Design And Implementation Of Ethernet Driver Module Of AP Equipment

With the rapid development of wireless network technology,The wireless broadband access,which is provided by wireless area network,satisfying users' requirements in a mobile case.Acess Point equipment,as the key module of wireless area network,whose performance will directly affect the performance of WLAN.AP equipment works as a wireless Ethernet switch that convert the input wire network signal into radio signal and forming wireless network covering,the process efficiency of the Ethernet cable packets will directly affect the performance of wireless AP equipment.Ethernet technology has a wide application in many areas since it has the advantages of easy to use,low in price.This paper focuses on the design and implementation of Ethernet driver module of AP equipment,mainly contains three aspects as follows.1.Requirement analysis.By analysing the requirements of AP equipment and the funcitons and features of the chips which have been chosen,the overall design of the software and hardware have been given,with emphasize on the design and implement of Ethernet driver module.The software development of AP equipment driver program is based on embedded Linux system.The Ethernet driver module including the driver of MAC chip and switch chip.2.The design and implementation of AP equipment.The main function of MAC chip is sending,receiving and processing Ethernet packets.inculding data communication processing,interrupt processing of packet sending and receiving,packet classification statistical processing etc,The MAC driver module mainly implement the MAC chip initialization,send and receive message.The main function of the switch chip is to achieve retransmission of Layer 2 packets,including establish and delete MAC table and VLAN table,retransmission mechanism.The MAC chip and the switch chip connect via SGMII and RGMII interface,data communication between them is another important function of the Ethernet drive module.This AP equipment provides three Gigabit LAN ports and one Gigabit WAN port,and can improve the process rate of Ethernet packet significantly.3.The system test.In order to verify the Ethernet driver module meets the requirements or not,the test cases have been designed,system test were carried on to the Ethernet driver module.The AP equipment operate well during the test procedure,all the requirments were satisfied.The test result verified that the design scheme is effective.The Ethernet driver module improves the Ethernet packet process rate effectively.The Ethernet packet process rate is no longer been the bottleneck of wireless access,Allowing users enjoy wireless gigabit bandwidth rates.