Adaptive Broadcast Transmission Parameter Control
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Solution Overview
Problem
Conventional broadcast services in cellular radio communication networks utilize excessive network resources and cause interference by transmitting information with high power and channel codes, regardless of user conditions, leading to inefficient use of resources.
Innovation Solution
A method and system that adapt broadcast transmission parameters based on user feedback, adjusting transmit power, channel resources, and error correction levels to optimize channel quality for registered users, ensuring that only users with sufficient channel quality receive advanced information, thereby minimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If broadcast service transmits information with high transmit power to ensure reception by as many users as possible, then broadcast reception reliability is improved, but network resource utilization increases and interference to other services increases
Solution Approach 1:
The broadcast transmission parameters are made dynamic through continuous adaptation based on user channel quality feedback. The system transitions from static high-power broadcast to dynamic parameter adjustment, where transmit power, channel codes, and modulation schemes are continuously optimized based on actual user conditions, resolving the contradiction between ensuring reception and conserving resources
Solution Approach 2:
The system changes multiple transmission parameters including transmit power, channel codes, modulation schemes, and data rates based on user channel quality indications. By adjusting these parameters dynamically, the system achieves reliable broadcast reception while minimizing network resource consumption and interference, directly addressing the technical contradiction
2Reliability
If broadcast service uses high transmit power and channel codes to ensure information reception, then broadcast coverage is improved, but interference to other services increases
Solution Approach 1:
The system dynamically adjusts transmit power and channel code parameters based on actual user channel quality feedback. By reducing transmit power when users have good channel conditions and selecting appropriate channel codes, the system maintains broadcast reception reliability while minimizing interference to other services, resolving the contradiction between coverage and interference
3Device complexity
If broadcast service transmits information blindly without user feedback, then system complexity is reduced, but resource allocation efficiency decreases
Solution Approach 1:
The system introduces feedback mechanisms where users provide channel quality indications to the base station. This feedback enables the base station to adapt broadcast parameters dynamically, significantly improving resource allocation efficiency. The feedback loop allows the system to optimize resources based on actual user needs while maintaining manageable complexity through standardized feedback protocols
Data Source
AI summary
A system and method for adapting a broadcast service in a cellular communication network. A base station receives indications of channel quality from registered users of the broadcast service, and adapts broadcast transmission parameters to improve channel quality for the broadcast users if at least one of the broadcast users indicates that channel quality needs to be improved. If none of the broadcast users indicates that channel quality needs to be improved, the base station adapts the transmission parameters to decrease channel quality for the broadcast users. The transmission parameters may be adapted by techniques such as changing the broadcast transmit power, changing the level of FEC encoding and modulation, changing the number of channel resources allocated, or changing the transmission data rate for the broadcast service. When multiple base stations transmit the broadcast information, a base station controller may minimize network resource utilization by coordinating adaptation control among the base stations.