Downlink Pre-emption Bitmap for 5G Resource Multiplexing
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Solution Overview
Problem
Next-generation/5G radio access networks (NR) face challenges in efficiently multiplexing data traffic between Enhanced Mobile BroadBand (eMBB), massive Machine-Type Communication (mMTC), and Ultra Reliable and Low Latency Communication (URLLC) services, requiring flexible frame structures and resource allocation to meet diverse requirements, including latency and coverage needs.
Innovation Solution
A method for transmitting and receiving downlink pre-emption indication information using a bitmap, allowing user equipment to monitor and receive information on time-section or frequency-section resources that have been pre-empted, enabling dynamic resource sharing and puncturing or superposition of URLLC data onto eMBB/mMTC resources, thereby supporting efficient multiplexing and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time-section resource assignment is lengthened to improve cell throughput and coverage for eMBB and mMTC services, then resource utilization efficiency improves, but latency increases making it unsuitable for URLLC services
Solution Approach 1:
The patent implements dynamic resource assignment by introducing a pre-emption indication mechanism that allows the system to adaptively switch between long time-section assignments (for eMBB/mMTC efficiency) and short time-section assignments (for URLLC latency requirements). When URLLC traffic arrives, the base station can dynamically pre-empt previously assigned resources and notify affected user equipment through pre-emption indication information, enabling flexible resource reallocation without fixed commitment.
2Loss of time
If time-section resource assignment is shortened to reduce latency for URLLC services, then latency requirement is met, but resource utilization efficiency decreases affecting eMBB and mMTC services
Solution Approach 1:
The patent applies preliminary action by pre-assigning time-section resources to user equipment for eMBB and mMTC services, then providing a mechanism to revoke or modify these assignments when URLLC traffic needs to preempt them. The pre-emption indication information is prepared and transmitted in advance to notify user equipment of resource changes, allowing the system to maintain efficient long-term assignments while being ready to quickly accommodate urgent short-latency requirements.
3Adaptability or versatility
If a flexible frame structure is implemented to support multiple service scenarios, then adaptability improves, but system complexity increases
Solution Approach 1:
The patent implements universality by designing a unified pre-emption indication mechanism that can handle multiple service scenarios (eMBB, mMTC, URLLC) through a single framework. The same indication structure and processing logic are used regardless of which service type is being preempted, allowing the system to support diverse services without requiring separate complex management mechanisms for each service scenario.
Data Source
AI summary
Provided is a method for transmitting and receiving downlink pre-emption indication information using a bitmap in a next-generation/5G radio access network. The method may include: receiving monitoring configuration information for downlink pre-emption indication information from a base station; monitoring downlink pre-emption indication information based on the monitoring configuration information; and receiving the downlink pre-emption indication information from the base station, wherein the downlink pre-emption indication information includes a bitmap indicating information on at least one of time-section resources and frequency-section resources in which pre-emption has occurred, among reference downlink resources.