User Equipment Assistance Information for Multicast Scheduling
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently and reliably scheduling multicast and unicast transmissions due to limited feedback from user equipment (UE) and outdated network parameters, leading to potential interference and quality of service (QoS) issues.
Innovation Solution
User equipment (UE) assistance information (UAI) is transmitted to network nodes, indicating capabilities, feedback preferences, and measurement schemes, allowing for dynamic adjustment of multicast and unicast transmissions to improve scheduling efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network nodes schedule multicast transmissions without receiving UE assistance information, then the scheduling process is simpler and faster, but the reliability and quality of service deteriorate due to outdated network parameters and limited feedback
Solution Approach 1:
The patent implements a feedback mechanism where UEs transmit assistance information (including capability indicators and feedback scheme preferences) to network nodes. This feedback enables network nodes to make informed scheduling decisions for multicast transmissions, improving reliability by aligning transmissions with actual UE capabilities and preferences, while the structured feedback format keeps the added complexity manageable.
2Productivity
If network nodes use outdated network parameters for scheduling, then the scheduling process is faster and requires less information exchange, but interference increases and quality of service deteriorates
Solution Approach 1:
The patent applies preliminary action by having UEs proactively transmit assistance information before multicast transmissions begin. This includes providing capability indicators and feedback scheme preferences in advance, allowing network nodes to configure optimal scheduling parameters before transmissions start, thereby preventing interference issues rather than reacting to them later.
Solution Approach 2:
The structured feedback mechanism provides network nodes with current UE capability information and preferences, enabling them to make informed scheduling decisions that avoid interference while maintaining efficient resource utilization. The feedback includes specific parameters that directly guide scheduling decisions.
3Adaptability or versatility
If UEs provide detailed feedback on capabilities and preferences, then network nodes can make more informed scheduling decisions, but the amount of information to process increases
Solution Approach 1:
The patent segments UE assistance information into distinct, manageable components: capability indicators (indicating whether the UE can process multicast transmissions) and feedback scheme preferences. This segmentation allows network nodes to process different aspects of UE capabilities independently, reducing overall processing complexity while maintaining comprehensive adaptability.
Solution Approach 2:
The patent transforms complex UE capabilities into standardized parameter formats that network nodes can easily process. By converting capability information into discrete indicators and preferences rather than raw data, the system achieves high adaptability with manageable processing requirements.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a multicast service available for subscription by the UE or to which the UE is already subscribed. The UE may transmit a message, to a network node, that may include UE assistance information (UAI) indicating at least one of a UE capability to process multicast transmissions or a feedback scheme preference for reporting feedback for the multicast transmissions. The UAI may also include at least one of a multicast carrier preference, band or carrier measurement report, a multicast priority indication, or a measurement and reporting scheme preference for the multicast transmissions. The network node may receive the UAI and determine one or more parameters for multicast communications with the UE based on the UAI. The UE may receive the multicast transmissions from the network node in accordance with the UAI.