Network Switching for Mobile Multimedia Services
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Solution Overview
Problem
Current mobile multimedia services experience time delays and service interruptions during network switching between terrestrial digital broadcast networks and mobile communication networks, primarily due to buffering and decoding delays when switching from one network to another.
Innovation Solution
A network switching method that detects signal strength in the first network and initiates parallel data reception from a second network when the signal strength falls below a preset value, allowing for buffering and decoding of media stream data before switching, thereby reducing time delays and preventing service interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile terminal switches from the terrestrial digital broadcast network to the mobile communication network, then the service continuity is maintained, but a time delay occurs due to buffering and decoding requirements, resulting in service interruption
Solution Approach 1:
The patent applies preliminary action by initiating parallel data reception from the second network (mobile communication network) before completing the switch from the first network (terrestrial digital broadcast network). The terminal starts receiving and buffering media stream data from both networks simultaneously, so that when switching occurs, the data is already prepared and ready for immediate playback, eliminating the time delay associated with post-switch buffering and decoding.
2Loss of time
If the mobile terminal receives data from the mobile communication network before switching, then the time delay is reduced, but the device complexity increases due to parallel data reception and buffering requirements
Solution Approach 1:
The patent merges the data reception functions of two networks by implementing a unified buffer that can store media stream data from both the terrestrial digital broadcast network and the mobile communication network. This combining approach allows the terminal to receive data from both sources simultaneously while using a single buffering and decoding system, thereby reducing device complexity compared to maintaining separate reception and buffering systems for each network.
Data Source
AI summary
A network switching method, device and system for mobile multimedia services are provided. The method includes: detecting signal strength of media stream data of a first network, and when the signal strength of the media stream data of the first network is smaller than a first preset value, receiving media stream data of a second network in parallel; and buffering the media stream data of the second network, decoding the buffered media stream data of the second network, and playing the decoded media stream data of the second network. The device includes a first communication module, a detecting module, a switching module, a second communication module, a processing module and a playing module. The system includes a first network, a second network and a terminal. Through the method, device and system, the time delay in the process of switching the serving network is reduced, and the service interruption caused by the network switching when the terminal performs multimedia services is prevented.