TDD Downlink Scheduling With SBFD Uplink Resource Sharing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
TDD systems face limitations in resource utilization due to half-duplex operation, leading to reduced uplink transmission rates and increased delays, particularly in configurations with more downlink time slots, which hinder efficient uplink services.
Innovation Solution
Implementing Sub-Band Full-Duplex (SBFD) time-frequency resources to enable flexible use of frequency-domain resources for both uplink and downlink transmissions, allowing overlapping resources to be utilized efficiently by determining available time-frequency resources for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If half-duplex operation is used in TDD systems, then frequency-domain resources can be used for either uplink or downlink at the same moment, but resource utilization is limited and uplink transmission rates are reduced
Solution Approach 1:
The patent applies dynamics by enabling the system to switch between half-duplex and sub-band full-duplex modes dynamically. The base station can configure different UEs to operate in different modes based on channel conditions and traffic requirements, allowing the frequency-domain resources to be dynamically allocated for simultaneous uplink and downlink transmissions in sub-band full-duplex mode, thereby improving uplink transmission rates while maintaining system adaptability
Solution Approach 2:
The patent applies segmentation by dividing the frequency domain into multiple sub-bands. In sub-band full-duplex mode, different sub-bands can be allocated for uplink and downlink transmissions simultaneously, while other sub-bands can operate in half-duplex mode. This segmentation allows the system to achieve both high uplink rates in FD sub-bands and resource flexibility in HD sub-bands, resolving the contradiction between resource utilization and uplink transmission rate
2Productivity
If more downlink time slots are configured in TDD systems, then downlink capacity is increased, but uplink transmission delays are increased
Solution Approach 1:
The patent applies dimensionality change by introducing frequency-domain multiplexing within the time slot structure. Instead of only varying time slot allocation, the system now utilizes the frequency dimension by allowing simultaneous uplink and downlink transmissions in different sub-bands within the same time slot. This enables uplink transmissions to occur concurrently with downlink transmissions, reducing uplink delays while maintaining high downlink capacity through the preserved time slot allocation
3Productivity
If Sub-Band Full-Duplex resources are introduced, then resource utilization is improved and uplink capacity is increased, but system complexity increases
Solution Approach 1:
The patent applies universality by designing the base station to support both half-duplex and sub-band full-duplex modes through the same resource allocation framework. The base station can configure UEs to operate in either mode based on conditions, and the UE is designed to support both modes as well. This multi-functionality allows the system to achieve improved resource utilization through SBFD when needed while falling back to simpler HD operation when appropriate, thereby managing system complexity while maintaining high productivity
Data Source
AI summary
The present application provides a data transmission method and an apparatus, and an electronic device. The method comprises: determining a PDSCH time-frequency resource corresponding to a first user equipment and an SBFD time-frequency resource corresponding to a second user equipment, wherein the PDSCH time-frequency resource and the SBFD time-frequency resource are located in the same downlink time slot or a special time slot, and the SBFD time-frequency resource is indicated to be used for uplink; sending downlink data corresponding to the first user equipment on the basis of the PDSCH time-frequency resource, wherein the first user equipment is a half-duplex user equipment supporting an SBFD capability; and receiving uplink data corresponding to the second user equipment on the basis of the SBFD time-frequency resource. The technical solution of the present application can increase the resource utilization rate.