Method and device for keeping user equipment ip address fixed

Abstract

The embodiment of the present invention provides a method and device for keeping the IP address of the user equipment fixed, including: when the PGW detects that the UE establishes a PDN connection on the PGW, the PGW broadcasts the newly added routing information arriving at the UE to the area corresponding to the SGi interface All routers in the network, so that each router can learn routes according to the newly added routing information, and obtain a dynamic route to the UE. The destination address of the dynamic route is the static IP address of the UE. Therefore, when the router receives the UE's downlink When receiving a data packet, the downlink data packet is forwarded to the PGW according to the dynamic route. The above method can keep the IP address of the UE unchanged, and does not need to manually configure the route. The router itself dynamically learns the route, especially in the scenario of multiple PGW networking, which reduces the complexity of routing configuration and reduces the need for detours. The problem of resource waste caused by routing.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a method and device for keeping an IP address of a user equipment fixed. Background technique [0002] With the rapid development of Long Term Evolution (LTE for short) technology, wireless bandwidth capabilities are increasing, and more and more users choose the LTE system as a wireless broadband access method. After a wireless user equipment (UserEquipment, referred to as UE) is connected to the network, it usually requires a fixed Internet Protocol (Internet Protocol, referred to as IP) address for communication. Core (referred to as EPC) switching, usually requires UE to adopt different IP addresses under different EPC PGW, if UE adopts the same IP address under different EPC packet data gateway (Packet Data Network Gateway, referred to as PGW), then When the router forwards downlink packets, it cannot determine which PGW to forward the packets to accor...

AI Technical Summary

Problems solved by technology

[0004] In the solution of the prior art, detour routes need to be configured in the EPC, and bandwidth needs to be reserved for detour messages. In the case of multiple EPC networking, detour routes need to be configured on multiple EPCs, and detour messages occupy a large amount of bandwidth. , and the configuration is more complicated and the maintainability is poor

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