Idle-Mode Paging Preambles for Multicast Beam QoS Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently delivering multicast content to user equipment in idle mode without evaluating channel conditions, leading to suboptimal quality of service.
Innovation Solution
A radio access network node determines transmission resources for multicast content delivery to user equipment in idle mode without evaluating channel conditions, using multicast beam patterns and preambles to adjust and update transmission based on received quality of service, transitioning to connected mode when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel condition evaluation is performed for idle mode user equipment, then quality of service can be optimized, but system complexity and signaling overhead increase
Solution Approach 1:
The user equipment autonomously selects the best beam pattern from the provided set without network assistance, and self-reporting its quality metric to the network. This eliminates the need for complex network-side channel evaluation mechanisms while maintaining service quality.
Solution Approach 2:
The network pre-configures multiple beam patterns and their identifiers before the user equipment needs them. This preliminary provision of resources allows the user equipment to make informed selections without real-time network intervention, reducing signaling overhead.
2Reliability
If multiple beam patterns are transmitted to all user equipment, then coverage and quality of service improve, but wireless resource consumption increases
Solution Approach 1:
Instead of transmitting complete beam pattern information to all user equipment, the network transmits a limited set of beam pattern identifiers that are sufficient for user equipment to make quality decisions. This partial information approach reduces resource consumption while maintaining service quality.
Solution Approach 2:
The system changes from transmitting full beam configuration parameters to transmitting compressed beam pattern identifiers. This parameter transformation reduces the amount of data that needs to be transmitted over the air interface.
3Reliability
If user equipment transitions to connected mode for content reception, then quality of service is guaranteed, but latency and signaling overhead increase
Solution Approach 1:
The network pre-configures user equipment with multiple beam patterns and quality thresholds before content delivery begins. This preliminary configuration allows user equipment to remain in idle mode and autonomously manage content reception without frequent mode transitions.
Solution Approach 2:
The system enables dynamic quality monitoring and beam pattern switching while user equipment remains in idle mode. This dynamic adaptation eliminates the need for transitioning to connected mode, reducing latency and signaling overhead.
4Device complexity
If blind transmission without beam pattern optimization is used, then system simplicity is maintained, but signal strength and reception quality deteriorate
Solution Approach 1:
User equipment autonomously measures signal quality metrics for different beam patterns and selects the optimal one without complex network coordination. This self-service approach maintains system simplicity while improving signal strength through intelligent beam selection.
Solution Approach 2:
User equipment provides feedback reports containing quality metrics to the network, enabling the network to understand which beam patterns are effective. This feedback mechanism allows continuous optimization of signal strength without increasing system complexity.
Data Source
AI summary
A user equipment may be configured by a radio access network node via a configuration, such as a multicast configuration, comprising beam pattern information corresponding to downlink beams usable by the user equipment while the user equipment is idle. The user equipment may determine signal strength or error rate metrics. If a determined metric indicates violation of a configured criterion, the user equipment may transmit to the node a preamble contained in the configuration. Based on the preamble, the node may update the beam pattern information, or the node may transmit a paging message comprising a preamble identifier corresponding to the preamble transmitted by the idle user equipment. The idle user equipment may determine, based on the preamble identifier in the paging message corresponding to the preamble transmitted by the user equipment, to transition to connected mode.