Call back busy method, call processing method, device and system

Abstract

The embodiment of the invention relates to the technical field of communication and discloses a call back busy method, a device and a system. The method comprises the following steps of: receiving a call forwarded by a called mobile switching center, wherein the call is forwarded under the condition that when a calling subscriber calls a called subscriber through the called mobile switching center, the called subscriber is judged by the called mobile switching center to be busy and the called subscriber starts a call forwarding busy function; after the calling subscriber is judged to start a call back busy service, detecting whether the called subscriber is idle or not through an ATI (Aerial Tuning Inductance) signaling; and if yes, connecting the calling subscriber and the called subscriber to hold conversation. In the invention, the ATI signaling is used for detecting the state of the called subscriber without detecting whether the called subscriber is idle or not directly through a calling mode, thus the waste of a relay link can be further reduced, and the mode of detecting the state of the called subscriber by adopting the ATI signaling cannot disturb the called subscriber.

Description

technical field [0001] The present invention relates to the field of communication technology, and in particular to a call back method in case of busy, a call processing method, device and system. Background technique [0002] Call loss is referred to as call loss for short. It refers to the loss rate of the call that cannot be completed due to the busyness of the called user after the user initiates a call under normal circumstances. Regulation. Usually, in this case, the user can only wait for the right time to initiate the call again. According to statistics, the ratio of the number of call losses caused by the called user being busy to the total number of calls is as high as 1% to 3%. In order to restore this part of the call loss as much as possible, in the Global System for Mobile Communications (GSM, Global System for Mobile Communications) standard and the Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access) standard, a busy callba...

AI Technical Summary

Problems solved by technology

[0004] The inventors found that when the prior art utilizes the intelligent network to implement call back on busy, the service control point of the intelligent network needs to periodically initiate a call connection operation to the called user in order to determine whether the called user is free, which will waste trunk link resources, At the same time, it may harass the called user

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