Uplink Scheduling via Logical Channel Mapping Restrictions
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Solution Overview
Problem
In 5G new radio (NR) systems, the variation in numerologies and transmission time interval (TTI) durations complicates the uplink transmission process, as existing methods do not account for these variations, leading to unfair data transmission sizes among logical channels and inefficient resource allocation.
Innovation Solution
A method and apparatus for a terminal to receive information on mapping restrictions and uplink grants from a base station, allowing it to select the most suitable logical channel for transmission based on supported numerologies and TTI durations, ensuring fair and efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If various types of numerologies and TTI durations are supported in 5G NR, then system adaptability and versatility are improved, but uplink transmission complexity increases due to difficulty in selecting appropriate logical channels
Solution Approach 1:
The base station performs preliminary configuration by providing mapping restriction information to the terminal before uplink transmission occurs. This mapping restriction information pre-establishes the relationship between logical channels and numerology/TTI duration combinations, allowing the terminal to quickly determine appropriate logical channels without complex real-time calculations, thus reducing transmission complexity while maintaining support for multiple numerologies and TTI durations
2Ease of operation
If existing uplink transmission methods are used without considering numerology and TTI duration variations, then transmission simplicity is maintained, but data transmission fairness among logical channels deteriorates
Solution Approach 1:
The patent applies different mapping restriction rules to different logical channels based on their specific requirements. Each logical channel can have customized mapping restrictions that consider its associated numerology and TTI duration characteristics, ensuring that each channel receives appropriate treatment for fair resource allocation while maintaining overall system simplicity through standardized configuration procedures
3Speed
If logical channel selection does not consider mapping restrictions, then transmission speed is faster due to simpler selection process, but resource allocation efficiency deteriorates
Solution Approach 1:
Mapping restriction information is provided in advance by the base station, creating a pre-established lookup table of valid logical channel selections for different numerology and TTI duration combinations. This allows the terminal to perform fast selection by simply matching current conditions against the pre-configured restrictions, achieving both rapid selection speed and efficient resource allocation without complex real-time optimization
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. According to the present disclosure, a terminal can perform uplink scheduling in accordance with a priority of a logical channel in a mobile communication system supporting various numerology types and TTI durations.