Multi-Beam Uplink Preemption to Resolve Resource Conflicts
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing uplink transmissions when multiple beams are involved, leading to conflicts and inefficiencies in resource allocation and utilization.
Innovation Solution
Implementing a mechanism for pre-emption indication and cancellation in multi-beam scenarios, where wireless devices receive DCI messages to adjust uplink transmissions based on cancellation indications, allowing for dynamic adjustment of beam configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple beams are used for uplink transmissions, then communication coverage and capacity are improved, but resource allocation conflicts and system complexity increase
Solution Approach 1:
The patent segments the uplink transmission resources by associating different beams with different SCell (Secondary Cell) indices. Each beam is uniquely identified through a combination of SCell index and beam index, allowing the system to manage multiple beams independently without resource conflicts. This segmentation enables scalable multi-beam operations while maintaining organized resource allocation.
Solution Approach 2:
The patent introduces an additional dimension for resource identification by combining frequency domain resources (physical uplink shared channel resources) with spatial dimension (beam indices). This multi-dimensional resource allocation framework allows the system to distinguish between different beams using the same frequency resources, thereby increasing communication capacity without proportionally increasing allocation complexity.
2Productivity
If dynamic beam configuration adjustment is implemented, then uplink transmission efficiency is improved, but signaling overhead and processing delay increase
Solution Approach 1:
The patent pre-configures beam parameters and associations between SCell indices and beam indices before actual uplink transmissions begin. By establishing these configurations in advance through RRC (Radio Resource Control) signaling, the system avoids real-time configuration negotiations during data transmission, thereby reducing processing delays while maintaining dynamic adaptability when needed.
Solution Approach 2:
The patent implements a feedback mechanism where the gNodeB (base station) sends pre-emption indications to the UE (user equipment) regarding beam usage. The UE monitors these indications and adjusts its beam configuration accordingly, creating a closed-loop system that optimizes uplink transmission efficiency while minimizing unnecessary configuration changes through informed decision-making.
Data Source
AI summary
A wireless device receives one or more radio resource control (RRC) messages that indicate uplink transmission configuration indicator (TCI) states associated with cancellation indications (CIs). The wireless device receives a first DCI scheduling a transmission via uplink resources and indicating a first uplink TCI state. The wireless device receives a second DCI that includes a cancellation indication (CI) indicating cancellation resources that overlaps with the uplink resources. The wireless device drops the transmission via the uplink resources in response to the uplink TCI states including the first uplink TCI state of the transmission.