RRC Connection Management for Small Data Transmission
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Solution Overview
Problem
In wireless communication systems, especially in LTE and LTE-advanced networks, the transmission of small data often results in inefficient use of radio resources due to the need for numerous control messages to establish and release radio resource control (RRC) connections, particularly when the small data information is invalid, leading to potential network congestion and failure in rejecting invalid connections.
Innovation Solution
A method where the network or user equipment (UE) establishes an RRC connection for small data transmission, includes small data information in the RRC connection setup complete message, and releases the connection using an RRC connection release message if the data is invalid, rather than rejecting it, allowing for efficient resource management and handling of invalid data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RRC connection establishment messages are exchanged for small data transmission, then data communication capability is improved, but radio resource waste increases due to large number of control plane transmissions
Solution Approach 1:
The patent combines small data transmission with existing RRC connection establishment procedures. Instead of separate control plane transmissions, the small data is embedded within the RRC connection setup complete message, merging data transmission with connection management functions to reduce overhead.
Solution Approach 2:
The RRC connection establishment message is given multi-functionality by enabling it to carry both connection setup information and small data payloads. This universal message structure serves dual purposes: establishing the connection and transmitting small data, eliminating the need for additional dedicated control messages.
2Productivity
If RRC connection is established for small data transmission, then data communication is enabled, but system complexity increases due to additional control message handling
Solution Approach 1:
The patent merges small data handling into the existing RRC connection establishment flow. By embedding small data within standard RRC messages rather than creating separate handling procedures, the system avoids adding complex dedicated control message processing while still enabling small data transmission.
3Loss of energy
If RRC connection release message is sent for invalid small data, then resource cleanup is achieved, but message transmission reliability may be compromised if connection is already released
Solution Approach 1:
The patent performs preliminary validation of small data within the RRC connection setup complete message before fully establishing the connection. If the small data is invalid, the network can reject it during the setup phase itself, preventing the need for subsequent release messages and avoiding the reliability issue of sending messages to already-released connections.
Data Source
AI summary
A method of handling a small data transmission for a network of a wireless communication system includes allowing a user equipment of the wireless communication system to establish a first radio resource control (RRC) connection for the small data transmission; receiving a first RRC connection setup complete message corresponding to the first RRC connection from the user equipment, wherein the first RRC connection setup complete message comprises small data information; and transmitting an RRC connection release message to the user equipment to release the first RRC connection when determining that the small data information is invalid.