Communications Device Inactive State Small Data Transmission
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Solution Overview
Problem
Future wireless communications networks face challenges in efficiently supporting a diverse range of devices with varying data traffic profiles and requirements, including reduced complexity devices, high-resolution video displays, virtual reality headsets, and autonomous vehicles, which necessitate improved handling of small data transmissions with low latency and high reliability.
Innovation Solution
A method for a communications device to receive a paging message indicating downlink small data transmission (SDT), determine if predetermined conditions are met, and respond accordingly to optimize radio resource use by transmitting an indication to the network, allowing efficient SDT reception in an inactive state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a communications device receives downlink small data transmission while in inactive state, then data transmission efficiency is improved, but device complexity and power management complexity increase
Solution Approach 1:
The patent applies parameter changes by modifying the operational parameters of the communications device. Specifically, it changes the state parameter from traditional idle/inactive states to a new inactive state that permits selective downlink SDT reception. The device evaluates predetermined conditions (data volume threshold, latency requirement, QoS parameters) and adjusts its reception behavior accordingly, enabling efficient small data transmission while maintaining manageable device complexity through condition-based decision making.
2Reliability
If the communications device evaluates predetermined conditions before receiving downlink SDT, then reliability of data transmission is improved, but use of energy increases
Solution Approach 1:
The patent implements partial action by selectively evaluating only the necessary predetermined conditions relevant to downlink SDT reception. Rather than continuously monitoring all possible parameters, the device evaluates specific conditions (data volume below threshold, latency requirements met, QoS compatibility) only when paging messages indicate potential SDT opportunities. This partial evaluation approach ensures reliable transmission decisions while minimizing energy consumption compared to continuous full-state monitoring.
Solution Approach 2:
The device performs self-service by autonomously evaluating its own state and the incoming data characteristics against predetermined conditions. The communications device independently determines whether to accept downlink SDT based on its buffer status, current operational state, and service requirements without requiring continuous network control or external decision-making, thereby improving reliability while managing energy usage efficiently.
3Loss of time
If the communications device remains in inactive state to receive downlink SDT, then loss of time is reduced, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the communications device with predetermined conditions and thresholds for accepting downlink SDT while in inactive state. The network and device establish acceptance criteria in advance (data volume thresholds, latency requirements, QoS parameters), enabling rapid decision-making when paging messages arrive. This preliminary preparation reduces the time needed to process incoming data decisions while minimizing signaling overhead by avoiding continuous negotiation or detailed parameter exchange during active transmission.
Data Source
AI summary
A method for operating a communications device in a wireless network is described. While in an inactive state, the device receives a paging message indicating an upcoming downlink small data transmission (SDT). Upon receiving the message, the device determines if predetermined conditions for receiving the SDT are met. It then transmits an indication to the network regarding whether the conditions are met and receives the downlink SDT based on this determination.