Heterogeneous system vertical switching method based on dual channel

Abstract

The invention relates to the technical field of wireless communication, and discloses a vertical switching method based on a dual channel. The vertical switching method comprises the following steps: a vertical switching management entity is added in a switching anchor point P-GW (Packet Data Network Gateway) in a 3GPP (the 3rd Generation Partnership Project) system, and when a multimode terminal in the 3GPP system (a first communication system) is firstly switched to an unauthorized non-3GPP mobile communication system (a second communication system), the vertical switching management entity agents the multimode mobile terminal to regularly send tracking or updating information to a control node MME (Mobility Management Entity) of a core network in the first communication system, and maintains the acquiescent PDN (Packet Data Network) connection of the multimode terminals in the first communication system, and the acquiescent PDN connection is known as a first channel. The multimode terminal conducts the normal communication through establishing a special PDN connection in the second communication systems, and the special PDN connection is known as a second channel. When the multimode terminal returns to the first communication system renewedly, data is still received through the second channel, and then is switched to the first channel after an air interface connection on the first communication system is re-established, so that the control signal interaction process is reduced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a dual-channel-based heterogeneous system vertical switching method. Background technique [0002] With the development of wireless communication technology and the constant change of business requirements, network heterogeneity will become an important feature of the wireless network environment for a long time in the future. In addition, the enrichment of business content, the diversification of network capabilities, and the differentiation of terminal functions make how to enable users to enjoy the best seamless service experience in a complex and changeable heterogeneous environment has become a challenge for the next-generation wireless communication system. problem. Under the existing heterogeneous network deployment, such as Wireless Local Area Network (WLAN) and Worldwide Interoperability for Microwave Access (WiMAX) are adopted by the 3rd Generation Partn...

AI Technical Summary

Problems solved by technology

[0006] When a multi-mode terminal switches from a non-trusted non-3GPP network to a 3GPP network, it needs to perform access security authentication and authentication. The mobility management context is rebuilt at the core network control node MME, and the core network data nodes S-GW and P- The EPS bearer is rebuilt at the GW, and the connection on the air interface is rebuilt at the evolved base station (Evolved Node B, eNodeB), which will interact with more access stratum (Access Stratum, AS) and non-access stratum (Non Access Stratum, NAS) signaling leads to a large delay in the interruption of uplink and downlink switching, which cannot meet the requirements of smooth switching specified in heterogeneous integration scenario 5

Images