MBMS HARQ Feedback Channel Allocation for Radio Resource Optimization
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Solution Overview
Problem
Existing MBMS systems face challenges in efficiently allocating radio resources for multimedia broadcast multicast services, leading to degradation of service quality for multiple terminals due to the inability to control radio resources effectively.
Innovation Solution
A method is introduced where the base station requests terminals to measure and report their reception state for MBMS services, using allocated uplink radio resources to adjust radio configuration parameters, thereby optimizing radio resource usage and ensuring quality of service for each terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio resources are allocated per terminal for MBMS services, then service quality can be controlled for each terminal, but radio resource congestion and collision increase
Solution Approach 1:
The patent merges the resource allocation unit from terminal-level to service-level. Multiple terminals receiving the same MBMS service share a common HARQ ACK/NACK channel and uplink radio resources, thereby reducing overall resource consumption while maintaining service quality through service-based control mechanisms.
Solution Approach 2:
The patent creates universal uplink radio resources that serve multiple terminals simultaneously for the same MBMS service. The HARQ ACK/NACK channel is designed to be multi-functional, handling feedback from any terminal subscribed to a particular service without requiring dedicated resources for each terminal.
2Measurement precision
If feedback channels are allocated for each terminal, then reception state can be monitored accurately, but channel collision and congestion occur
Solution Approach 1:
The patent combines multiple terminal feedback channels into a single service-level feedback channel. Terminals subscribed to the same MBMS service transmit their HARQ ACK/NACK feedback through a shared uplink channel, eliminating channel collision while maintaining accurate reception state monitoring through proper multiplexing and identification mechanisms.
3Reliability
If radio configuration parameters are adjusted per terminal, then service quality can be optimized, but system complexity increases
Solution Approach 1:
The patent segments the resource allocation and parameter control from terminal-specific to service-specific dimensions. The base station manages radio configuration parameters at the service level rather than individual terminal level, reducing control plane complexity while maintaining service quality through service-based parameter adjustment.
Data Source
AI summary
In a wireless mobile communications system, a method of supporting quality of Multimedia Broadcast Multicast Service (MBMS) while using minimum possible radio resource(s) of a cell. A method of providing a multimedia multicast broadcast service (MBMS) in a wireless communications system that may include: transmitting a feedback configuration parameter to at least one terminal that is subscribed in a MBMS service; transmitting a MBMS service data to the at least one terminal; and receiving feedback information from the at lest one terminal that uses the feedback configuration parameter for a transmission of the feedback information.