Uplink Control Information Reporting via PUSCH for 5G NR Unlicensed Spectrum
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Solution Overview
Problem
In the context of 5G New Radio (NR) systems using unlicensed spectrum, there is no existing method for User Equipment (UE) to share uplink channel occupancy information with the base station, leading to a long uplink channel access process and low uplink/downlink communication efficiency.
Innovation Solution
A method and device that determine time-frequency resource indication information for uplink channel occupation, carrying this information on a Physical Uplink Shared Channel (PUSCH) scheduled by a Physical Downlink Control Channel (PDCCH) or licensed PUSCH, allowing the base station to send information according to the indicated time-frequency resource, thereby reducing the need for multiple Listen-Before-Talk processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the UE does not share uplink channel occupancy information with the base station, then the system maintains simple communication protocols, but the uplink channel access process becomes long and communication efficiency decreases
Solution Approach 1:
The UE performs Listen-Before-Talk (LBT) procedure in advance to determine channel occupancy before actual data transmission. The channel occupancy information obtained through this preliminary action is then reported to the base station via PUSCH, allowing the base station to prepare for subsequent communications without requiring the UE to perform LBT again, thus reducing access delay while maintaining protocol simplicity
Solution Approach 2:
The PUSCH (Physical Uplink Shared Channel) serves as an intermediary mechanism to transmit channel occupancy information from the UE to the base station. This intermediary channel enables efficient information exchange without requiring complex dedicated signaling protocols, resolving the contradiction between protocol simplicity and communication efficiency
2Reliability
If the UE performs multiple Listen-Before-Talk processes for uplink channel access, then the system ensures reliable channel sensing, but the channel access duration increases
Solution Approach 1:
The UE performs the LBT procedure once in advance to obtain channel occupancy information, which is then valid for a predetermined period. This preliminary channel sensing eliminates the need for repeated LBT processes during the validity period, maintaining sensing reliability while significantly reducing access time for subsequent transmissions
Solution Approach 2:
The system dynamically adjusts the validity period of channel occupancy information based on channel conditions and traffic requirements. When the channel remains occupied, the UE can continue transmitting without repeating LBT, adapting the access mechanism to actual channel dynamics and reducing unnecessary access delays
Data Source
AI summary
A method and device for reporting uplink control information, a storage medium, and a user equipment. The method comprises: determining a time-frequency resource indication information of an uplink channel occupation information, the time-frequency resource indication information being used for indicating a time-frequency resource of an uplink channel occupied by a user equipment; carrying an uplink indication information by a preset time-frequency resource on a PUSCH scheduled by a PDCCH and/or a licensed PUSCH, the uplink indication information comprising the time-frequency resource indication information of the uplink channel occupation information; sending the PUSCH scheduled by the PDCCH and/or the licensed PUSCH to a base station, so that the base station sends, according to the time-frequency resource of the uplink channel, information to be sent. The solution provided by the present invention facilitates reducing the time length of an uplink channel access process and improving the uplink and downlink communication efficiency.