Uplink Data Channel Dropping in 5G Unlicensed Bands
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink signal transmission and channel access procedures, particularly in unlicensed bands, which affects data transmission rates and reliability, especially in 5G communication systems that require high data rates and low latency.
Innovation Solution
A method and apparatus for determining data channel transmission or reception in a wireless communication system, involving a scheme for performing a channel access procedure and dropping transmission of part of the first physical uplink shared channel (PUSCH) to enable transmission of a second PUSCH, with configuration information and downlink control information being exchanged between terminals and base stations to optimize resource allocation and access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel access procedure is performed in unlicensed bands, then transmission reliability is improved, but transmission latency increases
Solution Approach 1:
The system performs channel access procedures and resource allocation in advance before actual data transmission. The base station pre-configures uplink resources and performs channel sensing beforehand, so that when data needs to be transmitted, the channel is already cleared and resources are ready, reducing transmission latency while maintaining reliability through the preliminary channel access procedure.
2Productivity
If uplink resource allocation is optimized, then data transmission rate is improved, but system complexity increases
Solution Approach 1:
The uplink resource allocation is segmented into different types (configured grant Type 1 and Type 2) with different levels of flexibility. Type 1 provides pre-configured resources for low-complexity scenarios, while Type 2 allows dynamic adjustment for high-throughput scenarios. This segmentation allows the system to achieve high data transmission rates when needed while keeping complexity manageable by having simpler fallback options.
3Productivity
If multiple PUSCH transmissions are scheduled, then data throughput is improved, but resource collision increases
Solution Approach 1:
The system implements feedback mechanisms where the base station monitors uplink transmissions and provides scheduling adjustments. When multiple PUSCH transmissions are scheduled, the base station receives feedback about channel conditions and resource usage, then dynamically adjusts subsequent allocations to avoid collisions while maintaining high throughput through efficient retransmission scheduling.
Data Source
AI summary
The disclosure relates to a communication technique for convergence between an IoT technology and a 5G communication system for supporting higher data transmission rate beyond a 4G system, and a system thereof. The disclosure may be applied to intelligence services (e.g., smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety related services, etc.) based on a 5G communication system and an IoT related technology. In addition, the disclosure relates to a method and apparatus for transmitting or receiving an uplink data channel in a wireless communication system. Specifically, the disclosure relates to a method for transmitting or receiving an uplink data channel in an unlicensed band. More specifically, the disclosure proposes a method determining, based on an uplink data channel transmission method by which a terminal received or configured by a base station, a channel access procedure scheme and uplink data channel transmission.