Full-Duplex Wireless Scheduling Through DCI Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing scheduling mechanisms in wireless communication systems, particularly for full-duplex operation, are insufficient to meet communication requirements due to limited frequency band allocation, leading to reduced coverage, increased latency, and decreased capacity.
Innovation Solution
A method and apparatus that utilize Downlink Control Information (DCI) to dynamically determine frequency and time domain resources for simultaneous uplink and downlink transmissions, enhancing scheduling flexibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional TDD time domain resource allocation is used, then system structure is simple, but uplink coverage is reduced and latency is increased
Solution Approach 1:
The patent transitions from traditional TDD time-domain division to full-duplex frequency-domain simultaneous transmission. By introducing frequency domain resource assignment in DCI, the system enables uplink and downlink to occur simultaneously in different frequency bands, fundamentally changing the resource allocation dimension from time-only to frequency-time combined, thereby reducing latency while maintaining manageable system complexity through standardized protocol extensions
2Reliability
If limited time interval is allocated for Uplink in TDD, then downlink transmission is guaranteed, but uplink coverage is reduced and capacity is decreased
Solution Approach 1:
The patent segments the frequency spectrum into distinct uplink and downlink frequency bands that can operate simultaneously. By dividing the frequency domain into separate resource pools for uplink and downlink transmissions, the system guarantees downlink reliability in its allocated bands while providing dedicated uplink frequency resources that increase uplink capacity, resolving the trade-off through frequency-domain segmentation rather than time-domain sharing
3Device complexity
If existing DCI scheduling mechanism is used for full-duplex, then scheduling simplicity is maintained, but frequency band allocation is insufficient and scheduling performance is poor
Solution Approach 1:
The patent introduces dynamic frequency domain resource assignment in DCI formats, allowing the base station to flexibly allocate frequency resources for uplink and downlink transmissions based on real-time channel conditions and traffic demands. The DCI structure is enhanced with dynamic indicators that enable adaptive frequency band selection and sizing, providing scheduling versatility while maintaining relatively simple implementation through existing physical layer signaling mechanisms
Data Source
Figure 1~3
Figure 4~5
Figure 6~8(b)
AI summary
The present application discloses a method and apparatus used in a communication node for wireless communication. The communication node receives a first DCI, and the first DCI comprising a first domain; wireless reception is performed on the first physical layer channel and wireless transmission is performed on the second physical layer channel; the first domain of the first DCI is used to determine the frequency domain resource occupied by the first physical layer channel and the frequency domain resource occupied by the second physical layer channel The present application proposes a new resource allocation scheme for full-duplex operation, with time or frequency domain resources that are used foruplink transmission and downlink transmission through a DCI domain scheduling, and the proposed scheme improves the flexibility and resource utilization of resource scheduling.