Radio Network Node Scheduling Small Data in Control Region Subsets
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Solution Overview
Problem
Existing solutions do not adequately address situations where a User Equipment (UE) is configured with multiple control regions, and they do not optimize signaling complexity for transferring small data packets in 5G New Radio (NR) systems.
Innovation Solution
A method where a radio network node determines to transmit downlink data to a UE in control region subsets when the amount of data is less than or equal to a threshold, allowing better resource utilization and orthogonal resource allocation, which reduces latency and improves parallelism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If control regions are dimensioned to signal multiple UEs simultaneously using statistical multiplexing, then the control region can handle multiple UEs, but the search spaces for different UEs must be randomized which increases complexity and reduces resource utilization efficiency for small data packets
Solution Approach 1:
The control region is segmented into control region subsets that can be independently allocated to different UEs. This segmentation allows deterministic resource allocation where each UE is assigned specific subsets, eliminating the need for randomized search spaces while maintaining the ability to signal multiple UEs simultaneously. The control resource sets (CORESETs) are also segmented and can be dedicated to specific UEs or shared in a controlled manner.
2Quantity of substance
If control regions span the entire carrier bandwidth to handle all UEs, then all UEs can be signaled, but resource utilization efficiency decreases when only a few UEs have data to transmit
Solution Approach 1:
The control region configuration is made dynamic through the introduction of control region subsets that can be flexibly allocated. The network can dynamically determine which control region subsets to use based on the number of UEs requiring service. When only a few UEs have data, fewer control region subsets are activated, improving resource utilization. When more UEs need service, additional subsets are activated to maintain signaling capacity.
3Reliability
If small data packets are transmitted in regular data regions, then standard transmission procedures apply, but latency increases and resource allocation is less efficient compared to control region transmission
Solution Approach 1:
The control region is prepared in advance with dedicated control resource sets (CORESETs) and control region subsets that can immediately transmit small data packets without requiring the full data region setup procedures. This preliminary configuration of control resources enables faster transmission of small data packets, reducing latency while maintaining reliable transmission through the use of established control channel procedures.
Data Source
AI summary
Embodiments herein relate to a method performed by a radio network node (110) in a RAN for scheduling DL data for a UE (120) in a control region subset (140). The UE (120) has one or more control resource sets (CORESETs) (130) configured in a control region (150), in which CORESET (130) the UE (120) should monitor for (PDCCH). The method comprises determining to transmit DL data to the UE (120) in the control region subset, when the amount of DL data for the UE (120) is less or equal to a threshold. Embodiments herein further relate to a radio network node (110) in a RAN, for scheduling DL data for a UE (120) in a control region subset (140). The radio network node (110) is configured to perform the method for scheduling DL data in a control region subset (140).