Small Data Transmission via Paging Messages
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Solution Overview
Problem
Mobile devices experience high power consumption and signaling overhead due to frequent connections and disconnections with control nodes for transmitting small data, which is inefficient and wasteful, especially in DDA data transmission characterized by varying time intervals and small data sizes.
Innovation Solution
A small data transmission method that allows user equipment to receive and transmit data without establishing a Radio Resource Control (RRC) connection by monitoring paging opportunity subframes for small data indicators, extracting data from indicating addresses within paging messages, and using specific preamble signals for uplink transmissions, thereby reducing the need for constant RRC state switching and minimizing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the mobile electronic device establishes an RRC connection with the control node to transmit small data, then the data transmission can be completed, but the power consumption increases and signaling overhead increases
Solution Approach 1:
The patent extracts the small data transmission function from the traditional RRC connection establishment process. Instead of establishing a full RRC connection for small data transmission, the device extracts only the necessary signaling elements (paging message with data indicator) to enable small data transmission, thereby avoiding the overhead and power consumption associated with complete connection establishment.
Solution Approach 2:
The patent applies partial action by implementing a simplified transmission mechanism that performs only the minimum necessary actions for small data transmission. The device monitors paging messages for data indicators and transmits small data without performing the excessive actions of full RRC connection establishment, including unnecessary signaling exchanges and connection maintenance procedures.
2Productivity
If the mobile electronic device establishes an RRC connection with the control node to transmit small data, then the data transmission can be completed, but the signaling overhead increases
Solution Approach 1:
The patent extracts the essential transmission function from the complete RRC connection protocol. By using only the paging message with embedded data indicator and minimal acknowledgment signaling, the system removes the excessive signaling elements inherent in full RRC connection establishment, thereby reducing signaling overhead while maintaining data transmission capability.
Solution Approach 2:
The implementation uses partial action by performing only the necessary signaling steps for small data transmission. The device monitors paging messages for data indicators and sends brief acknowledgments, avoiding the excessive signaling exchanges required for complete RRC connection establishment and maintenance.
3Reliability
If the mobile electronic device stays connected with the control node to receive small data, then the data can be received timely, but the power consumption increases due to inability to enter sleep mode
Solution Approach 1:
The patent implements periodic action by having the mobile device monitor paging messages at specific intervals rather than maintaining continuous connection. The device wakes up to check for paging messages containing data indicators, then returns to idle state, thereby achieving reliable data reception while enabling power saving through periodic rather than continuous monitoring.
Solution Approach 2:
The system dynamically transitions between idle and active states based on the presence of small data. The device remains in idle mode (power-saving state) until a paging message with a data indicator is detected, at which point it briefly activates to receive and process the small data, then returns to idle state. This dynamic state management resolves the contradiction between reliable reception and power consumption.
Data Source
AI summary
A small data transmission method, configured for a User Equipment (UE) to transceive a small data from a control node in a wireless network without establishing a Radio Resource Control (RRC) connection, and the method includes but not limited to the step of: monitoring a paging opportunity (PO) sub frame in a paging frame in an idle mode; when an identifier in the PO sub frame corresponding to the UE is detected, receiving a paging message corresponding to the PO sub frame; and analyzing the paging message, and when the paging message includes a small data indicator, extracting a data from an indicating address, in which the data is the small data.