Overlapping Uplink Repetitions With Rule-Based CSI Multiplexing
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Solution Overview
Problem
Existing wireless communication systems face challenges in increasing the likelihood of successful message reception and reducing latency, power consumption, and retransmissions through efficient multiplexing techniques.
Innovation Solution
Wireless devices utilize overlapping transmissions using time, frequency, and spatial division multiplexing to send repetitions of messages, applying rules to determine which repetitions include multiplexed information and prioritize power usage, enhancing synchronization and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repetitions are transmitted using time division multiplexing, then the likelihood of successful reception increases, but the latency increases
Solution Approach 1:
The patent transitions from one-dimensional time division multiplexing to multi-dimensional multiplexing by incorporating frequency division multiplexing and spatial division multiplexing. This allows repetitions to be transmitted simultaneously across multiple frequency resources and spatial layers, thereby maintaining reliability while reducing the time delay associated with sequential time-based repetitions.
Solution Approach 2:
The patent combines multiple multiplexing techniques (time, frequency, and spatial) into a unified transmission framework. By merging these dimensions, the system can transmit multiple repetitions concurrently rather than sequentially, resolving the contradiction between achieving high reliability through repetitions and minimizing the latency they introduce.
2Productivity
If multiplexed information is included in repetitions, then the information transmission efficiency increases, but the device complexity increases
Solution Approach 1:
The patent employs parameter-based rules to determine which repetitions contain multiplexed information. By changing and comparing transmission parameters (such as frequency resource indices, spatial layer indices, and repetition indices), the system efficiently decides information placement without requiring complex algorithms, thus balancing productivity improvement with manageable device complexity.
Solution Approach 2:
The patent segments the multiplexing decision-making process into manageable rules based on different transmission dimensions. Instead of handling all multiplexing decisions as a single complex problem, the system divides it into separate rules for time, frequency, and spatial domains, making the overall system more tractable while still achieving high transmission efficiency.
3Use of energy by moving object
If power prioritization rules are applied to overlapping transmissions, then the power consumption is optimized, but the transmission reliability may decrease
Solution Approach 1:
The patent applies power prioritization rules that assign different power levels to different transmissions based on their local characteristics and importance. Rather than using a uniform power reduction approach, the system selectively prioritizes certain transmissions (e.g., those carrying critical multiplexed information) while allowing less critical repetitions to use reduced power, thus optimizing overall power consumption while maintaining essential transmission reliability.
Data Source
AI summary
A wireless device may communicate with a base station by using overlapping transmissions. Information such as a channel state information (CSI) report may be multiplexed in a repetition of a transmission such as a physical uplink shared channel (PUSCH) transmission. A rule may be applied to indicate/determine which repetition, of a plurality of repetitions, comprises the multiplexed information. The rule may comprise including the multiplexed information in a transmission associated with at least one of: a lowest (or highest) frequency or range of frequencies, a lowest (or highest) starting (or ending) resource block, a lowest (or highest) transmission configuration indicator (TCI) state, a lowest (or highest) TCI state index, a lowest (or highest) panel or panel index, and/or any other parameter/indicator that may differentiate a transmission (including the multiplexed information) from other transmission(s).