Full-Duplex Base Station Scheduling for Simultaneous Uplink Downlink Transmission
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Solution Overview
Problem
In full duplex communication technologies, ensuring simultaneous uplink and downlink data transmission at the same moment and frequency is challenging due to timing delays in receiving control information, leading to interference and inefficient spectrum resource utilization.
Innovation Solution
A scheduling method where a base station sends uplink grant information at a first moment and downlink data at a second moment, aligning data transmission for terminals performing both uplink and downlink operations, with optional indication information in control messages to coordinate full-duplex capabilities and subframe configurations, ensuring synchronized data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If advance pre-decision scheduling is used for uplink transmission, then the terminal can transmit uplink data at a delayed time after receiving control information, but it cannot ensure simultaneous uplink and downlink data transmission at the same moment and frequency
Solution Approach 1:
The base station performs preliminary scheduling decisions for both uplink and downlink transmissions, determining the timing and resources for simultaneous transmissions before actual data transmission occurs. This allows the system to coordinate full-duplex operations in advance, ensuring that uplink and downlink data are transmitted at the same moment and frequency without timing conflicts.
2Ease of operation
If uplink data transmission is performed at a time delayed after receiving control information, then the terminal can process control information properly, but simultaneous uplink and downlink transmission at the same moment and frequency cannot be achieved
Solution Approach 1:
The system dynamically adjusts the timing of control information delivery and data transmission based on the full-duplex scheduling requirements. The base station can flexibly configure the timing relationships between control information reception, uplink data transmission, and downlink data reception, allowing terminals to maintain proper processing while achieving simultaneous transmission through adaptive timing adjustments.
3Productivity
If full duplex technology is implemented with simultaneous uplink and downlink transmission, then spectrum resource utilization is doubled, but timing alignment between uplink and downlink transmission cannot be ensured
Solution Approach 1:
The system implements feedback mechanisms where the base station monitors the timing and synchronization status of full-duplex transmissions. Based on this feedback, the base station adjusts scheduling decisions, timing configurations, and resource allocations to maintain precise timing alignment between uplink and downlink transmissions, ensuring that simultaneous operations occur at the exact same moment and frequency.
Data Source
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AI summary
This application relates to a scheduling method and a device. In the scheduling method, a base station sends, at a first moment, uplink grant (UL GRANT) information to a terminal that is to perform uplink data transmission; the base station sends, at a second moment, downlink data to a terminal that is determined by the base station and that is to perform downlink data transmission, where the second moment is a moment at which the terminal that is to perform uplink data transmission sends uplink data after receiving the uplink grant information at the first moment. In this way, the base station can send data to or receive data from, at a same moment, the determined terminal that is to perform uplink data transmission and the determined terminal that is to perform downlink data transmission, to ensure that the base station can perform uplink data transmission and downlink data transmission with the terminals at a same moment and a same frequency, thereby improving spectrum utilization and saving resources.