Bandwidth Part Switching for Multicast and Broadcast Power Reduction
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Solution Overview
Problem
Current wireless communication systems do not efficiently support bandwidth part switching for unicast, multicast, and broadcast communications, leading to increased power consumption and limited power saving capabilities in user equipment (UEs).
Innovation Solution
The method involves a user equipment (UE) receiving indications of common frequency resources (CFRs) configured for multicast and broadcast downlink communications, associated with specific bandwidth parts. The UE determines whether to switch bandwidth parts based on these indications, enabling efficient switching between unicast, multicast, and broadcast communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If bandwidth part switching is not implemented for multicast and broadcast communications, then UE power consumption remains high due to continuous monitoring, but implementing switching mechanisms increases system complexity
Solution Approach 1:
The patent segments the downlink communication into separate bandwidth parts for unicast, multicast, and broadcast communications. Each bandwidth part can be independently configured and switched, allowing the UE to monitor only the necessary bandwidth part for each communication type, thereby reducing overall power consumption while maintaining manageable system complexity through modular organization
Solution Approach 2:
The patent implements dynamic bandwidth part switching mechanisms where the UE can transition between different bandwidth parts based on the type of downlink communication (unicast, multicast, or broadcast). This dynamic adaptation allows the UE to optimize its monitoring behavior and power consumption according to the active communication type without requiring complex static configurations
2Reliability
If the UE monitors all downlink communications continuously, then communication reliability is maintained, but power consumption increases
Solution Approach 1:
The patent implements periodic bandwidth part switching where the UE monitors different bandwidth parts at different times based on the scheduled downlink communications. Instead of continuous monitoring of all bandwidth parts, the UE periodically switches to the appropriate bandwidth part for unicast, multicast, or broadcast communications as scheduled, maintaining reliability while reducing power consumption through intermittent monitoring
3Productivity
If separate bandwidth parts are configured for unicast, multicast, and broadcast communications, then communication efficiency is improved, but configuration complexity increases
Solution Approach 1:
The patent creates a universal bandwidth part configuration framework that handles unicast, multicast, and broadcast communications through a common switching mechanism. The base station configures multiple bandwidth parts with different parameters optimized for each communication type, but uses a unified RRC signaling approach and switching logic in the UE, reducing configuration complexity while maintaining communication-specific optimization
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a first common frequency resource (CFR) configured for multicast downlink communications and associated with a first bandwidth part, and an indication of a second CFR configured for broadcast downlink communications and associated with a second bandwidth part. The UE may determine whether to switch a bandwidth part for receiving downlink communications based at least in part on the indication of the first CFR and the indication of the second CFR. Numerous other aspects are provided.