MBMS Uplink Feedback Control for Reliable 5G Multicast
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Solution Overview
Problem
Current multicast technologies in new radio systems, such as 5G, do not support feedback for multimedia broadcast multicast services, leading to unreliable service transmission and resource wastage.
Innovation Solution
An uplink feedback method that enables a terminal device to disable specific feedback functions for multimedia broadcast multicast services, allowing network devices to transmit data more reliably by adjusting feedback based on service requirements and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback functions are enabled for multimedia broadcast multicast service, then transmission reliability can be improved through feedback mechanisms, but resource consumption increases due to uplink feedback resource allocation
Solution Approach 1:
The patent applies dynamics by making the feedback function configurable and adaptable. The network device can dynamically enable or disable feedback functions based on service requirements, terminal capabilities, and network conditions. This is achieved through RRC configuration messages that allow flexible activation/deactivation of specific feedback types (HARQ, CSI, CQI, PMI, RI) for MBMS services, optimizing the balance between reliability and resource consumption in real-time
Solution Approach 2:
The patent changes the parameter state of feedback functions from fixed to variable. By introducing configuration parameters in RRC messages, the system can adjust feedback behavior (enabled/disabled, full/partial) according to different MBMS service scenarios. This parameter flexibility allows the network to optimize resource usage while maintaining necessary reliability levels for each specific service type
2Productivity
If feedback functions are disabled for multimedia broadcast multicast service, then resource allocation efficiency improves, but transmission reliability deteriorates due to lack of feedback mechanisms
Solution Approach 1:
The patent segments the feedback function into multiple independent controllable components. Instead of treating feedback as a single monolithic feature, it divides it into distinct types (HARQ feedback, CSI feedback, CQI feedback, PMI feedback, RI feedback) that can be independently enabled or disabled. This segmentation allows selective activation of only necessary feedback mechanisms for each MBMS service, improving resource efficiency while maintaining required reliability
Solution Approach 2:
The patent applies partial action by enabling only the specific feedback functions that are necessary for each MBMS service scenario rather than enabling all feedback functions universally. The network device can configure terminals to disable unnecessary feedback types, performing just enough feedback action required for reliable transmission without excessive resource consumption
3Reliability
If blind configuration of uplink feedback resources is performed, then feedback coverage is ensured, but resource wastage occurs due to unnecessary feedback resource allocation
Solution Approach 1:
The patent applies preliminary action by configuring feedback function status in advance through RRC signaling before actual MBMS service transmission begins. The network device pre-configures which feedback functions are enabled or disabled based on service requirements, terminal capabilities, and network conditions. This preliminary configuration prevents unnecessary feedback resource allocation during service execution, eliminating resource wastage while ensuring adequate feedback coverage for required functions
4Reliability
If multiple feedback functions are enabled simultaneously, then comprehensive transmission monitoring is achieved, but system complexity increases due to multiple feedback mechanisms
Solution Approach 1:
The patent applies universality by creating a unified feedback configuration mechanism that handles multiple feedback function types through a single RRC configuration framework. The same configuration message structure and signaling procedures are used to enable or disable different feedback types (HARQ, CSI, CQI, PMI, RI), providing a universal control interface that simplifies system complexity while maintaining comprehensive transmission monitoring capabilities
Data Source
AI summary
A communication method includes receiving, by a terminal device, first indication information. The first indication information is useable to indicate to the terminal device to disable a feedback function corresponding to a multimedia broadcast multicast service. The method further comprises disabling, by the terminal device, the feedback function corresponding to the multimedia broadcast multicast service.