A method, device and system for sending information

Abstract

An embodiment of the present invention provides an information sending method, and a first access network device, a core network device, and a terminal based on the method. The method is used in a communication system. The communication system includes a first access network device and a core network device, and there is a terminal connection between the first access network device and the core network device. The method includes: the first access network device It is determined that the context information of the terminal needs to be obtained; then, the first access network device sends a request message to the core network device, and the request message is used to request the context information of the terminal; the core network device sends a response message to the first access network device, and the response message Carry the context information of the terminal. In the embodiment of the present invention, when the first access network device determines that it needs to obtain the context information of the terminal, it can request the context information of the terminal from the core network device without saving the context information of the terminal in advance, thus saving access network The storage space of the device reduces the memory cost of the access network device.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular to an information sending method, device and system. Background technique [0002] In a wireless communication system, a terminal can access a core network (Core Network, CN) through a radio access network (Radio Access Network, RAN). For example, a terminal may access a core network device in the CN through a certain access network device in the RAN. After the terminal is connected to the core network, the access network device needs to save the context information of the terminal. However, the context information of the terminal is generally relatively large, which will occupy a lot of storage space of the access network device; moreover, an access network device supports a large number of terminals, which will cause a very high memory cost of the access network device. Contents of the invention [0003] The embodiment of the present invention describes a met...

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Problems solved by technology

However, the context information of the terminal is generally relatively large, which will occupy a lot of storage space of the access network device; moreover, an access network device supports a large number of terminals, which will cause the memory cost of the access network device to be very high

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