5G/6G Paging for Mobile-Terminated Small Data Transmission
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Solution Overview
Problem
Mobile terminated small data transmission (MT-SDT) is not yet supported in fifth generation wireless communication systems, leading to increased signaling overhead and UE power consumption, as well as higher latency due to the need for transitioning to radio resource control (RRC)_CONNECTED for small and infrequent data packets.
Innovation Solution
A method and apparatus for small data transmission in wireless communication systems, where a base station determines if the downlink data volume is below a threshold, and if so, sends a paging message with an inactive radio network temporary identifier (I-RNTI) and a mobile terminated small data transmission (MT-SDT) indication to the user equipment (UE).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transitions to RRC_CONNECTED state for small data transmission, then the data transmission reliability is improved, but the signaling overhead and UE power consumption increase
Solution Approach 1:
The patent segments the data transmission process by identifying small data packets that can be transmitted without full RRC connection establishment. The base station segments the paging message to include direct small data transmission indicators, separating the signaling overhead from the data transmission path for efficient handling of small packets.
Solution Approach 2:
The base station performs preliminary action by including MT-SDT indication and I-RNTI in the paging message before the UE establishes full RRC connection. This preliminary inclusion of transmission parameters allows the UE to prepare for direct small data reception, reducing the need for subsequent connection establishment signaling.
2Reliability
If the UE transitions to RRC_CONNECTED state for small data transmission, then the data transmission completeness is improved, but the transmission latency increases
Solution Approach 1:
The patent applies skipping by allowing small data transmission to bypass the complete RRC connection establishment process. The UE can directly receive and process small data packets indicated in the paging message, rushing through the essential data delivery without the time-consuming full connection setup procedures.
Solution Approach 2:
The base station performs preliminary action by pre-configuring the paging message with MT-SDT indication and necessary transmission parameters (I-RNTI, resource allocation). This preliminary preparation enables the UE to immediately receive and process small data without waiting for full connection establishment, significantly reducing latency.
3Productivity
If the base station sends detailed data transmission parameters in the paging message, then the transmission efficiency is improved, but the paging message size increases
Solution Approach 1:
The patent extracts only the essential parameters needed for small data transmission (I-RNTI, MT-SDT indication, basic resource allocation) and places them in the paging message. Detailed configuration parameters are extracted out and handled separately through compact indicators or pre-agreed configurations, minimizing the paging message size while maintaining transmission efficiency.
Solution Approach 2:
The patent changes the parameter representation by using compact indicators and references instead of full parameter sets. The I-RNTI serves as a compact identifier that references pre-configured UE context, and resource allocation uses condensed signaling formats, reducing the overall message size while preserving complete transmission information.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a base station in a mobile communication system is provided. The method includes receiving a downlink (DL) data for a user equipment (UE), determining whether a volume of the DL data is less than a data volume threshold, and in case that the volume of the DL data is less than the data volume threshold, transmitting, to the UE, a paging message including an inactive radio network temporary identifier (I-RNTI) and a mobile terminated small data transmission (MT-SDT) indication.