Mini-Slot Resource Allocation Pattern Signaling for mmW Beamforming
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently supporting multiple transmission configuration indicator (TCI) states for mini-slots, particularly in millimeter wave (mmW) spectrum, where existing techniques for configuring start and length indicator (SLIV) patterns are inadequate for beamforming-based systems.
Innovation Solution
The proposed solution involves resource allocation pattern signaling for mini-slots, where the base station configures SLIV patterns at the mini-slot level, allowing for rate adjustments across different TCI states, and the UE implicitly derives start and duration of subsequent mini-slots based on the initial SLIV pattern, reducing the need for explicit indications for each mini-slot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SLIV patterns are configured at the slot level using existing techniques, then resource allocation can be supported for regular slots, but resource allocation efficiency deteriorates for mini-slots with beamforming-based TCI states
Solution Approach 1:
The patent divides the resource allocation configuration into slot-level parameters and mini-slot-level parameters. The SLIV pattern is segmented into a base pattern at slot level and incremental adjustments at mini-slot level, allowing efficient support for multiple TCI states without reconfiguring the entire slot structure.
Solution Approach 2:
The patent introduces dynamic rate adjustments for mini-slots based on TCI state configurations. The resource allocation can be dynamically modified for each mini-slot within a slot using rate adjustment parameters, enabling flexible adaptation to different beamforming requirements while maintaining overall slot structure.
2Measurement precision
If explicit indications are provided for each mini-slot's start and duration, then precise resource allocation is achieved, but signaling overhead increases
Solution Approach 1:
Instead of providing complete explicit indications for each mini-slot, the patent provides partial indications through rate adjustment parameters. The UE derives the remaining information (start and duration) by combining the base SLIV pattern with the rate adjustment, achieving precise allocation with reduced signaling overhead.
Solution Approach 2:
The UE performs self-service by implicitly deriving the start and duration of subsequent mini-slots using the rate adjustment parameter and the base SLIV pattern. This eliminates the need for the network to explicitly signal each mini-slot's parameters, reducing overhead while maintaining precision.
3Adaptability or versatility
If flexible scheduling is implemented across multiple TCI states, then resource allocation adaptability improves, but system complexity increases
Solution Approach 1:
The base SLIV pattern is pre-configured at the slot level before mini-slot allocation. This preliminary configuration provides a foundation that simplifies subsequent mini-slot scheduling, as the UE only needs to apply rate adjustments rather than calculating complete resource allocations from scratch for each mini-slot.
Solution Approach 2:
The patent uses rate adjustment parameters to modify the base SLIV pattern for different mini-slots. By changing only the rate adjustment parameter rather than the entire SLIV configuration, the system achieves flexible scheduling across multiple TCI states while keeping the management complexity low through parameter-based control.
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AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control information indicating a resource allocation pattern for a downlink transmission that is configured for transmission using a plurality of beams and a plurality of mini-slots, where a duration of a mini-slot is less than a duration of a slot. The UE may identify a start time of a first mini-slot of the plurality of mini-slots and a length of the first mini-slot based on the resource allocation pattern, and receive the downlink transmission based on the start time of the first mini-slot and the length of the first mini-slot.