MT-SDT Paging With Inactive-State Data Delivery for 5G UEs
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, face challenges in efficiently handling mobile-terminated small data transmission (MT-SDT) for user equipment (UE) in a radio resource control (RRC) inactive state, leading to inefficiencies in data transfer.
Innovation Solution
A method and apparatus that enable the transmission of a paging message with an MT-SDT indication to UE in an RRC inactive state, allowing data transfer without transitioning to an active state, involving network nodes and UE components to facilitate MT-SDT.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transitions to an active state for data transfer, then data transfer reliability is improved, but latency increases and energy consumption increases
Solution Approach 1:
The network node pre-configures the UE with SDT resources and maintains the RRC inactive state during small data transmission. The UE is provided with pre-uplink and pre-downlink resources before data transfer begins, eliminating the need for state transition and reducing latency while maintaining reliable data transfer through pre-established communication paths.
Solution Approach 2:
The system dynamically manages the RRC state, allowing the UE to remain in the inactive state during SDT rather than transitioning to active. This dynamic approach enables the network to control the transmission process while the UE maintains its low-power inactive state, thereby reducing both latency and energy consumption while ensuring data transfer reliability through network-controlled resource allocation.
2Reliability
If the UE transitions to an active state for data transfer, then data transfer reliability is improved, but energy consumption increases
Solution Approach 1:
The network node pre-configures the UE with SDT resources and maintains the RRC inactive state during small data transmission. The UE is provided with pre-uplink and pre-downlink resources before data transfer begins, eliminating the need for state transition and reducing latency while maintaining reliable data transfer through pre-established communication paths.
Solution Approach 2:
The system dynamically manages the RRC state, allowing the UE to remain in the inactive state during SDT rather than transitioning to active. This dynamic approach enables the network to control the transmission process while the UE maintains its low-power inactive state, thereby reducing both latency and energy consumption while ensuring data transfer reliability through network-controlled resource allocation.
3Loss of time
If the UE remains in inactive state for data transfer, then latency is reduced and energy consumption is reduced, but device complexity increases
Solution Approach 1:
The network node acts as an intermediary that manages the SDT process while the UE remains in the inactive state. The network node controls resource allocation, monitors transmission, and manages the pre-configured resources, thereby offloading the complexity from the UE to the network infrastructure. This intermediary approach enables low-latency, low-energy SDT without burdening the UE with complex state management.
4Use of energy by moving object
If the UE remains in inactive state for data transfer, then energy consumption is reduced, but resource management complexity increases
Solution Approach 1:
The network node acts as an intermediary that manages the SDT process while the UE remains in the inactive state. The network node controls resource allocation, monitors transmission, and manages the pre-configured resources, thereby offloading the complexity from the UE to the network infrastructure. This intermediary approach enables low-latency, low-energy SDT without burdening the UE with complex state management.
Data Source
AI summary
A method of wireless communication at a network node and the related apparatus are provided. In the method, the network node first sends a paging message including a first indication of a mobile terminated small data transmission (MT-SDT) for a user equipment (UE) in a radio resource control (RRC) inactive state, and sends data for transfer to the UE while the UE remains in the RRC inactive state. By providing data transmission for UEs in Idle or inactive state, power consumption, latency and system overhead may beneficially be reduced.