A method, device and system for interoperability between different access network devices

Abstract

The embodiment of the present application discloses a method, device and system for interoperating between different access network devices: the first access network device establishes a first connection with the target terminal device; the first access network device responds to the target terminal device The voice service initiated by the terminal device builds the first virtual grid oriented to the 3G cell. At this time, the voice service will be switched from the 5G network to the 3G network; when the voice service ends on the 3G network side, the third access network device will connect to the second The network device sends a handover request message, and in response to the handover request message, the second access network device will construct a second virtual grid facing the 5G cell, and the first access network device will re-establish a second connection with the target terminal device. In the embodiment of this application, the first access network device reduces the access delay by constructing the first virtual grid oriented to 3G cells, and the second access network device reduces the access delay by constructing the second virtual grid oriented to 5G cells. The return delay improves the user experience.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method, device and system for interoperating between different access network devices. Background technique [0002] Currently, the New Radio (NR) standard defines two networking modes, which are standalone networking (Standalone, SA) and non-standalone networking (Non-Standalone, NSA). [0003] Among them, in the SA scenario, if the terminal device (the terminal device is a terminal device supporting the 5G network) has voice services, it can be carried in three ways: Method 1, if NR deploys VONR, the voice service is established on NR, Due to the high frequency band used by NR (C-band and above), the overall coverage of the cell is limited, and it is difficult to form continuous coverage in the initial stage of NR network construction, which leads to weaker coverage continuity and signal quality than existing LTE networks and UMTS networks. If NR cover...

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Problems solved by technology

[0004] However, in the above method 1, if the terminal device switches to the 3G network through SRVCC, the access delay of this switching method is about 2 seconds. In the above method 3, the terminal device first passes through the EPS FB The method falls back to the 4G network, and then falls back to the 3G / 2G network through CSFB. The total access delay of this switching method is about 8 seconds

Both of these switching methods have a large access delay; in addition, in methods 1 and 3, after the terminal device ends the voice service and switches from the 3G network to the 4G network side, the access network device on the 4G network side cannot perceive the The terminal device is a terminal device supporting the 5G network, so the access network device on the 4G network side will not switch or redirect the terminal device from the 4G network to the 5G network. The user returns to the 5G network through reselection. At this time, the return delay for the terminal device to return to the 5G network is about 8 seconds. If the terminal device also has PS services, it needs to wait until the PS service ends before the terminal device can return to the 5G network. To the idle state to enable the user to perform a reselection operation. At this time, the terminal device will hang on the 4G network side for a long time, resulting in a longer return delay

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