5G Downlink Resource Allocation for Latency Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G communications, the resource allocation mechanism for URLLC services leads to idle resources, causing inefficiency and increased latency for terminal devices as they cannot determine the availability of overlapped resources, resulting in complex downlink data reception and control information detection.
Innovation Solution
A communication method where a terminal device determines resource areas and detects downlink scheduling information with resource indication, allowing it to accurately select resources for data transmission, reducing latency by indicating available and unavailable resources, and configuring search spaces to avoid unnecessary PDCCH blind detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If resources are reserved for URLLC service to meet low latency requirement, then URLLC service latency is reduced, but resource utilization deteriorates due to idle reserved resources
Solution Approach 1:
The patent implements dynamic resource allocation where resources originally reserved for URLLC services are flexibly shared with eMBB services when URLLC traffic is absent. The network device dynamically determines whether to allocate overlapped resources to eMBB terminal devices based on actual URLLC service requirements, transforming static reserved resources into dynamic shared resources that adapt to real-time traffic conditions.
Solution Approach 2:
The patent changes the allocation status parameter of overlapped resources from exclusively reserved to conditionally shared. By introducing resource indication information that dynamically adjusts resource availability based on service type and traffic conditions, the system transforms fixed resource parameters into adaptable ones that optimize both latency and utilization.
2Productivity
If overlapped resources are configured for eMBB terminal device to improve resource utilization, then resource utilization is improved, but terminal device complexity increases due to inability to determine resource availability
Solution Approach 1:
The patent introduces resource indication information as a feedback mechanism from the network device to the terminal device. This feedback explicitly告知 the terminal device whether overlapped resources are available for downlink data reception, eliminating the need for complex blind detection and reducing terminal device processing complexity while maintaining high resource utilization.
Solution Approach 2:
The resource indication information acts as an intermediary that mediates between the network device's resource allocation decisions and the terminal device's reception operations. This intermediary provides clear resource availability status, simplifying the terminal device's decision-making process and reducing operational complexity.
3Reliability
If terminal device performs blind detection on downlink control information to ensure reliable reception, then reception reliability is improved, but detection time increases causing latency
Solution Approach 1:
The patent performs preliminary action by having the network device send resource indication information before the terminal device needs to receive downlink data. This advance notification allows the terminal device to pre-determine resource availability and prepare for reception without performing time-consuming blind detection, thereby reducing latency while maintaining reliability.
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
This application provides a communication method, a terminal device, and a network device. The method includes: determining, by a terminal device, N resource areas, where N is a positive integer; detecting, by the terminal device, downlink scheduling information in M resource areas, where the downlink scheduling information includes resource indication information of P resource areas; and determining, by the terminal device based on the resource indication information of the P resource areas, a resource for transmitting downlink data, where the M resource areas are M of the N resource areas, the P resource areas are P of the N resource areas, M is a positive integer less than or equal to N, and P is a positive integer less than or equal to N. In embodiments of this application, the resource for transmitting the downlink data is indicated to the terminal device by using the downlink scheduling information and the resource indication information of the P resource areas. This helps improve accuracy in determining, by the terminal device, the resource for transmitting the downlink data, to reduce a latency in receiving the downlink data or detecting downlink control information by the terminal device.