A Fast Roaming Method Of IP Zero Agent

With the development of mobile communication technology,wireless LAN users have corresponding mobility management strategies in various mobile modes.The dynamic address configuration protocol is a general method and technology for the STA to automatically obtain the legal IP address of the network according to the current configuration of the network when accessing different networks.STA's demand for access services is characterized by broadband,mobility and convenience.In the application of traditional DHCP protocol will cause communication interruption and service delay for each handover needs to obtain an IP address again.In order to adapt to the requirements of mobility,various technologies for IP switching have also been widely used.The main purpose of IP switching technology is to reduce the time of IP switching and reduce the loss of data packets after IP switching.However,the current technology is based on the cooperation between the AP and the STA,or the agent cooperation between different AP subnets is required for effective implementation.This paper analyzes the STA IP switching process in the WIFI network,and proposes a method of fast roaming switching from the perspective of the STA switching process.This paper mainly analyzes the situation of network layer IP fast roaming.The main work includes:1.This article first introduces some existing related protocols and technologies,and analyzes the existing protocols.The existing method mainly uses the DHCP pre-distribution method and the roaming proxy method between different subnets to resume the communication tunnel,and the switching route between different subnets is established through the tunnel to ensure the timeliness and data of the STA IP switching and data roaming.This paper analyzes the protocol exchange based on the handover process of WIFI STA roaming between different subnets,so as to reduce the delay of IP handover.It explores the planning and experimental optimization that the existing DHCP protocol can reasonably use.2.This paper proposes a method of rapid roaming and handover of IP zero proxy.By analyzing the behavior of the STA and identifying the last network configuration information of the terminal,the gateway actively adapts the configuration of the STA's previous network,so that the STA does not need to obtain an IP address,so it can reduce the delay of handover between networks.This method is the adaptation of any IP without a proxy.It does not require any proxy association for the network that the STA last accessed.The gateway adopting this method does not need to know thenetwork that the STA was last connected to,and can implement a complete proxy for any gateway.When the STA enters a new network,the STA does not need to change the original IP configuration and greatly short the delay caused by obtaining an IP address again.