Inactive-State Small Data Paging for Lower 5G NR Signaling
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Solution Overview
Problem
The frequent transmission of small data packets in the RRC inactive state leads to high signaling overheads and increased power consumption for user equipment in 5G NR networks, as the equipment frequently migrates between RRC inactive and connected states.
Innovation Solution
A data transmission method that supports mobile terminated-small data transmission (MT-SDT) allows user equipment to receive downlink data in the RRC inactive state without transitioning to the connected state, reducing signaling overheads and power consumption by using enhanced paging messages and context storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single frequency resource is used for both downlink and uplink transmissions, then resource utilization is improved, but interference between access signals and data signals increases
Solution Approach 1:
The resource pool is segmented into multiple frequency resources, with specific frequency resources designated for downlink transmissions and other frequency resources designated for uplink transmissions. This segmentation allows simultaneous downlink and uplink operations without mutual interference, while still achieving high resource utilization through coordinated frequency hopping across the segmented resources.
2Reliability
If frequency resources are separately allocated for downlink and uplink to avoid interference, then signal quality is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The system dynamically allocates frequency resources based on transmission direction requirements. Frequency hopping sequences are dynamically generated and configured for different terminal pairs, allowing the system to adaptively switch between frequency resources for downlink and uplink transmissions. This dynamic approach maintains signal quality through dedicated frequency resources while improving overall resource utilization efficiency.
3Reliability
If frequency hopping is used to avoid interference, then anti-interference capability is improved, but system complexity increases
Solution Approach 1:
The system employs self-service mechanisms where terminals autonomously generate and follow frequency hopping sequences based on pre-configured parameters. The base station configures hopping parameters (such as starting frequencies, hopping rates, and sequence patterns), but the actual frequency hopping execution is performed autonomously by the terminals without continuous base station control. This reduces system complexity while maintaining strong anti-interference capabilities.
Data Source
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AI summary
This application relates to the field of communication technologies, to resolve a problem that signaling overheads of user equipment are relatively high due to frequent transmission of a small data packet, and provides a data transmission method and a related device. The data transmission method comprises: receiving a first downlink data packet to be sent to user equipment; if the first downlink data packet meets a preset transmission scenario, sending an enhanced paging message to the user equipment, where the enhanced paging message carries a mobile-terminated small data transmission indication, so that the user equipment activates a corresponding target bearer based on the mobile-terminated small data transmission indication; and receiving a paging response message sent by the user equipment, and sending the downlink data packet to the user equipment, so that the user equipment in an RRC inactive state receives the downlink data packet based on the target bearer. Beneficial effects of this application lie in the following: When a downlink data packet arrives and meets the preset transmission scenario, the user equipment is controlled to receive the downlink data packet in the RRC inactive state, to reduce signaling overheads of the user equipment.