Uplink Transmission Symbol Exclusion for Wireless Latency Reduction
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Solution Overview
Problem
The increasing number of user equipment (UEs) and the growing volume of data and control information in wireless communication systems pose challenges for base stations (BSs) to efficiently manage limited radio resources, leading to delays and latency issues.
Innovation Solution
A method for UE uplink transmission in a wireless communication system, where the UE receives resource allocation information for multiple symbols, determines unavailable symbols based on this information, and performs uplink transmission in remaining symbols, excluding those marked as downlink or specific non-downlink symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of UEs and data volume increase to satisfy growing communication demands, then communication capacity and data throughput are improved, but resource management complexity and delay increase due to limited radio resources
Solution Approach 1:
The patent segments the time domain into multiple symbols within a slot, with each symbol independently configurable as downlink, uplink, or flexible. This segmentation allows the system to dynamically allocate specific symbols for uplink transmission, enabling efficient resource utilization and reducing delay by eliminating the need to wait for the next available uplink slot.
Solution Approach 2:
The patent implements dynamic slot format configuration where the slot format indicator (SFI) can change the direction of symbols within a slot based on current traffic conditions. This dynamic adjustment allows the system to adapt resource allocation in real-time, improving throughput by allocating more symbols to the direction with higher demand while maintaining low latency by ensuring uplink resources are available when needed.
2Productivity
If more frequency bands and MIMO technology are employed to increase data capacity, then communication capacity is improved, but system complexity increases
Solution Approach 1:
The patent introduces a new dimension of resource allocation by configuring the direction (downlink/uplink/flexible) of individual symbols within a slot, rather than allocating entire slots. This fine-grained temporal dimension allows the system to achieve high data capacity through efficient time-domain multiplexing without requiring additional frequency bands or complex MIMO configurations, thereby avoiding increased system complexity.
3Adaptability or versatility
If the slot format is dynamically configured to support various services with different requirements, then service adaptability is improved, but control signaling overhead increases
Solution Approach 1:
The patent creates a universal slot format configuration mechanism that can serve multiple service types (eMBB, mMTC, URLLC) through a single flexible framework. The slot format indicator (SFI) provides a compact representation that can dynamically adapt to different service requirements without requiring separate control signaling for each service type, thereby reducing overall control overhead while maintaining high service adaptability.
Data Source
AI summary
Provided are a method, a user equipment, a device and a recording medium in which: resource allocation information associated with a plurality of symbols is received; symbols which cannot be used for uplink transmission among the plurality of symbols are determined on the basis of the resource allocation information; and the uplink transmission is performed in at least one of the remaining symbols from the plurality of symbols excluding the symbols which cannot be used. The symbols which cannot be used comprise a symbol (DL symbol) in which a slot format is instructed as downlink (DL) and K non-DL symbols immediately after the DL symbol among the plurality of symbols. Each of the K non-DL symbols is a symbol in which a slot format is not instructed as DL, and K is an integer greater than 0.