Semi-Static Uplink Resource Allocation for Low Latency Wireless Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly for Ultra-Reliable and Low Latency Communications (URLLC), there are challenges with allocating uplink grants efficiently to meet short latency and high reliability requirements, leading to overhead and timeline issues.
Innovation Solution
A method utilizing semi-statically configured resources, such as UR_SPSRSC, to support data communication with reduced processing time for decoding DCI, allowing efficient communication by categorizing resources into types based on latency and reliability requirements, and configuring reference signals and puncturing/rate matching accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic grant allocation is used for URLLC data communication, then data communication can be performed dynamically, but overhead and timeline problems arise due to short latency requirements
Solution Approach 1:
The patent applies preliminary action by semi-statically configuring uplink resources and transmission parameters in advance for URLLC traffic. The gNB pre-allocates uplink grant-free resources, reference signals, and transmission parameters before actual data transmission is needed, eliminating the time-consuming dynamic grant allocation process and meeting strict latency requirements.
Solution Approach 2:
The patent segments resource allocation into different types: semi-statically configured resources for URLLC and dynamically allocated resources for eMBB. This segmentation allows URLLC traffic to use pre-configured resources independently, avoiding the overhead and timeline issues of dynamic grant allocation while maintaining adaptability for different service requirements.
2Loss of time
If semi-static resources are used for URLLC, then overhead and timeline problems are reduced, but resource flexibility may be limited
Solution Approach 1:
The patent implements dynamics by allowing the gNB to reconfigure semi-static uplink resources adaptively based on traffic conditions and service requirements. While resources are pre-configured to reduce processing time, the system maintains flexibility through periodic reconfiguration and dynamic adjustment of transmission parameters, balancing latency reduction with resource adaptability.
3Productivity
If uplink resources are allocated dynamically, then resource utilization can be optimized, but timeline problems occur due to grant allocation delays
Solution Approach 1:
The patent applies preliminary action by pre-configuring uplink grant-free resources semi-statically for URLLC traffic. This eliminates the need for real-time grant allocation and acknowledgment exchanges, significantly reducing grant allocation time while maintaining efficient resource utilization through pre-planned resource allocation.
4Adaptability or versatility
If dynamic DCI is used for eMBB, then data communication can be performed with flexible scheduling, but the approach is not suitable for short latency requirements
Solution Approach 1:
The patent segments the system into two distinct resource allocation mechanisms: dynamic DCI-based scheduling for eMBB traffic requiring flexibility, and semi-static grant-free allocation for URLLC traffic requiring low latency. This segmentation allows each service type to use the most appropriate allocation method, ensuring both scheduling flexibility and latency requirement fulfillment.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention provides a data communication performing method performed by a terminal in a wireless communication system, the method comprising: determining a resource configured for data communication having a relatively short latency requirement; and performing, on the resource, the data communication having the relatively short latency requirement, wherein the resource is a semi-statically configured resource.