Uplink Transmission Method Reducing Downlink Channel Overhead
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Solution Overview
Problem
In mobile communication systems, the existing uplink transmission methods require different scheduling information for channels within and outside a transmission opportunity, leading to excessive downlink channel resource overhead and increased number of UL grants, which restricts the scheduling of multiple subframes and increases network resource usage.
Innovation Solution
The method involves acquiring and transmitting uplink scheduling information and indication information of the transmission opportunity from the base station to the user terminal, allowing the terminal to determine the position and listening type of the uplink channel based on the scheduling information and indication, switching between different listening types as needed, and transmitting data when the channel is idle, thereby reducing the need for multiple UL grants and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different scheduling information is used for channels within and outside transmission opportunity, then the listening type can be optimized for each case, but the downlink channel resource overhead increases and the number of UL grants increases
Solution Approach 1:
The patent combines the scheduling information for channels within and outside the transmission opportunity into a single unified scheduling message. The base station generates one UL grant that contains both the scheduling information for the first uplink channel (within TXOP) and the second uplink channel (outside TXOP), eliminating the need for separate scheduling messages and reducing downlink resource overhead.
Solution Approach 2:
The unified scheduling information is designed to serve multiple purposes simultaneously - it schedules both channels within and outside the transmission opportunity, and provides listening type indications for both cases. This multi-functional scheduling approach reduces the number of separate UL grants needed while maintaining optimized listening type selection for each channel type.
2Adaptability or versatility
If separate UL grants are used for channels within and outside transmission opportunity, then the scheduling can be optimized, but the number of UL grants increases and network resources are consumed
Solution Approach 1:
The patent merges multiple UL grants into a single unified UL grant that schedules both channels within and outside the transmission opportunity. This reduces the number of separate UL grants from two to one, simplifying the scheduling process and reducing network resource consumption while maintaining the ability to optimize listening types for each channel.
3Adaptability or versatility
If multiple UL grants are transmitted, then the scheduling flexibility is improved, but the downlink resource overhead increases
Solution Approach 1:
The patent combines multiple UL grants into a single unified scheduling message that maintains the scheduling flexibility of separate grants while reducing the downlink resource overhead. The unified grant includes all necessary scheduling information and listening type indications for both channels within one message, eliminating redundant transmissions.
Data Source
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AI summary
The present disclosure provides an uplink transmission method, an uplink transmission device, a user terminal and a base station. The uplink transmission method includes: acquiring uplink scheduling information transmitted by a base station and indication information of a transmission opportunity currently occupied by the base station; determining a position of an uplink channel scheduled for the user terminal by the base station in accordance with the uplink scheduling information; determining a listening type of the uplink channel in accordance with the position of the uplink channel and the indication information of the transmission opportunity; and transmitting uplink data to the base station in the uplink channel when the uplink channel is listened to be in an idle state using the listening type of the uplink channel. The user terminal of the present disclosure uses different listening types within and outside the transmission opportunity in accordance with the indication information of the transmission opportunity issued by the base station. When the user terminal requests for uplink scheduling, the scheduling is not restricted to the transmission opportunity, and the base station only needs to transmit the uplink scheduling information once. Thus, the downlink channel resource overhead can be reduced, and the network resources can be saved.