Data transmission method, system and apparatus

Abstract

The embodiment of the invention discloses a data transmission method and a system thereof. The method comprises the steps of contacting inter-domain function entities (IDFE) in a packet switch network and a circuit switch network to obtain user status information of user equipment (UE) in the packet switch network, and sending data to the UE in accordance with the user status of the UE in the packet switch network. The embodiment of the invention also discloses an inter-domain function entity (IDFE), and a mobility management entirety (MME), a serving gateway (SGW) and a packet data network gateway (PDN GW) in the packet switch network. The technical proposal provided in the embodiment of the invention can save signaling in case of data transmission to the UE.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a data transmission method, system and device. Background technique [0002] The wireless communication network has developed from the original second-generation (2G) network to the third-generation (3G) network, until it has developed into an evolved packet system (EPS, Evolved Packet System) network, and its network architecture has undergone many changes. Some circuit domains have developed to a mixed circuit domain and packet domain, and then developed to a pure packet domain network system architecture. [0003] figure 1 It is a structure diagram of an EPS network in the prior art. like figure 1 As shown, the core network of the EPS network mainly includes three logical functional entities: a mobility management entity (MME, Mobility Management Entity), a serving gateway (Serving GW) and a packet data network gateway (PDN GW). Among them, MME is re...

AI Technical Summary

Problems solved by technology

When IDFE needs to page the user or has a data packet to be sent to the user, in the EPS network, the data packet is sent to the Serving GW, and the Serving GW finds that there is no downlink tunnel, that is, when the UE is in the idle (Idle) state, it sends the message to the MME Initiate paging, because the signal coverage of the EPS network is not as good as that of the 2G / 3G network, so the user may not be paged on the EPS network. At this time, paging the user on the 2G / 3G network will cause service delay. And the paging process in the EPS network causes a waste of network resources

If Paging is issued in both networks at the same time, it will also cause a certain waste of network resources. For example, when the user terminal UE is in the active (Active) state in the EPS network, that is, when the air interface is connected, in the 2G / 3G network paging is completely unnecessary

[0008] To sum up, in the prior art, when the user terminal UE is simultaneously registered in the EPS domain network and the 2G / 3G CS domain network, network resources will be wasted in the process of transmitting data to the UE

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