Uplink Cancellation Indication for Dynamic Resource Preemption
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Solution Overview
Problem
Next-generation 5G radio access networks, specifically new radio (NR), face challenges in efficiently multiplexing radio resources to meet diverse requirements for data rates, latency, reliability, and coverage across different usage scenarios like enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), necessitating flexible frame structures and numerology-based resource allocation.
Innovation Solution
The implementation of uplink data transmission methods based on uplink cancellation indication information, where user equipment (UE) monitors and responds to UL cancellation indication information to suspend ongoing data transmission, allowing for dynamic resource allocation and prioritization of low-latency communications by preempting scheduled resources for URLLC traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radio resources are allocated based on fixed frame structures and numerologies, then resource allocation is simple and manageable, but the system cannot efficiently meet diverse requirements for different usage scenarios (eMBB, mMTC, URLLC)
Solution Approach 1:
The patent implements dynamic resource allocation by introducing cancellation indication information that allows the base station to dynamically adjust uplink resource usage. Instead of fixed numerologies, the system can dynamically cancel or repurpose resources based on real-time traffic demands, enabling adaptation to different scenarios (eMBB, mMTC, URLLC) while managing complexity through controlled dynamic adjustments rather than complete structural flexibility
2Loss of time
If uplink resources are preempted for low-latency URLLC traffic, then latency requirements are met, but ongoing eMBB data transmission is interrupted
Solution Approach 1:
The patent applies preliminary anti-action by sending cancellation indication information before the uplink transmission occurs. The base station anticipates the need for resource reallocation and proactively notifies the UE to cancel the scheduled transmission, preventing resource conflicts before they occur. This allows URLLC traffic to secure resources with guaranteed low latency while eMBB transmissions are cleanly interrupted rather than conflicted, maintaining system reliability
Solution Approach 2:
The system performs preliminary action by configuring monitoring information in advance that tells UEs when and where to expect cancellation indications. This preparation allows UEs to be ready to cancel transmissions immediately when needed, ensuring URLLC latency requirements are met while maintaining orderly resource management and transmission reliability through pre-established protocols
3Productivity
If UEs continuously monitor for cancellation indications, then resource allocation responsiveness is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic action by configuring UEs to monitor for cancellation indications at specific periodic intervals rather than continuously. The monitoring is triggered at predetermined times based on the configured monitoring information, allowing UEs to remain responsive to resource allocation changes while consuming significantly less power by sleeping between monitoring periods. This periodic monitoring maintains productivity by catching all scheduled cancellation points while reducing energy usage
Data Source
AI summary
Provided are a method and a device for transmitting uplink data according to uplink cancellation indication information in a next-generation wireless network. A method of a terminal for transmitting uplink data may include: transmitting uplink data on the basis of uplink data resource allocation information; monitoring uplink cancellation indication information on the basis of monitoring configuration information on the uplink cancellation indication information; receiving the uplink cancellation indication information; and suspending the transmission of on-going uplink data on the basis of the uplink cancellation indication information.