Uplink Resource Configuration in 5G Unlicensed Bands
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently determining and managing time resource areas for uplink signals, particularly in 5G systems operating in unlicensed bands, which affects channel access procedures and overall communication performance.
Innovation Solution
A method and apparatus that enable a terminal to receive downlink control information from a base station to identify and configure resources for uplink signal transmission, including determining channel occupancy duration and symbol configuration, even without a slot format indicator, to efficiently transmit uplink signals in unlicensed bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal uses conventional methods to determine time resource areas for uplink signals in unlicensed bands, then channel access procedures become complex and resource allocation efficiency deteriorates, but if the terminal implements the patent method, then channel access efficiency improves and resource allocation becomes more effective
Solution Approach 1:
The base station performs preliminary actions by determining the channel occupancy time and symbol configuration in advance, then notifies the terminal through downlink control information. This allows the terminal to pre-configure uplink resources without complex real-time negotiations, improving channel access efficiency while reducing procedural complexity.
Solution Approach 2:
The downlink control information acts as an intermediary carrier, conveying the channel occupancy time and symbol configuration from the base station to the terminal. This intermediary mechanism simplifies the interaction between base station and terminal, enabling efficient resource allocation without direct complex negotiations.
2Manufacturing precision
If the base station provides detailed slot format indicators for all resources, then resource allocation precision improves, but downlink control information overhead increases
Solution Approach 1:
Instead of providing uniform detailed slot format indicators for all resources, the base station applies local quality by specifying channel occupancy time and symbol configuration only for the specific uplink resources that require precise allocation. This targeted approach maintains resource allocation precision for critical resources while minimizing downlink control information overhead for other resources.
Solution Approach 2:
The base station applies partial action by providing configuration information only for the specific channel occupancy period and relevant symbols, rather than providing complete slot format indicators for all possible resources. This partial information provision achieves sufficient resource allocation precision while reducing control information overhead.
Data Source
AI summary
The disclosure relates to a communication technique for convergence between a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system and a technology for Internet of Things (IoT), and a system thereof. The disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail businesses, security and safety related services, etc.) based on the 5G communication technology and the IoT-related technology. Disclosed are a method and an apparatus for determining a time domain resource area allocation. A method of a terminal includes receiving, from a base station, downlink control information (DCI) including information indicating a channel occupancy (CO) duration of the base station; identifying a resource associated with a configured grant for an uplink signal within the CO duration; identifying a configuration for a symbol of the resource, in case that a slot format indicator (SFI) for the resource is not provided in the DCI; and transmitting, to the base station, the uplink signal in the resource based on the identified configuration.