Mobile Device Unicast Broadcast Mode Switching
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Solution Overview
Problem
Current multimedia broadcast multicast service (MBMS) is limited in availability, as it is typically only supported in a few cells of the broadband network, leading to inefficient media content delivery when the number of recipients is small or zero, and mobile devices outside the MBMS zone receive media content via unicast sessions, which can overwhelm bandwidth.
Innovation Solution
A method and system that allow mobile devices to store both unicast and broadcast transmission specifications, enabling them to switch from unicast to broadcast reception mode when the broadcast transmission becomes available, reducing the need for duplicate content transmission and optimizing bandwidth usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If MBMS is used to transmit media content to multiple users, then bandwidth efficiency is improved, but network coverage is limited to specific cells
Solution Approach 1:
The system dynamically switches between unicast and broadcast modes based on real-time availability of MBMS service in the current cell. The mobile device monitors whether MBMS is available in the current cell and automatically selects the appropriate transmission mode, making the system adaptable to varying network conditions and coverage limitations.
2Reliability
If unicast sessions are used for users outside MBMS zone, then media content delivery is maintained, but bandwidth is overwhelmed
Solution Approach 1:
The mobile device stores both unicast and broadcast transmission specifications in advance. When MBMS becomes available in the current cell, the device can quickly switch to broadcast mode using the pre-stored broadcast specification, avoiding the need to maintain multiple active unicast sessions and reducing overall bandwidth consumption.
3Speed
If mobile devices store both unicast and broadcast specifications, then mode switching speed is improved, but device memory usage increases
Solution Approach 1:
The system stores transmission specifications selectively based on actual need. The mobile device stores both unicast and broadcast specifications initially, but only activates and manages the relevant specification when MBMS is available in the current cell. This partial activation approach minimizes active memory usage while maintaining the capability for rapid switching when needed.
Data Source
AI summary
A method, a base station, an application server and a mobile device for transmitting and receiving media content are disclosed. A transceiver 302 may receive a unicast transmission specification and a broadcast transmission specification for the media content. A processor 304 may determine if a broadcast transmission for the media content is available. The processor 304 may initiate a unicast reception mode to receive the media content based on the unicast transmission specification if the current broadcast transmission is not available. A memory 308 may store the broadcast transmission specification for later reception of the media content in a broadcast reception mode if the current broadcast transmission is not available.