LTE-UTRAN Handover Optimization for Small Data Transmission
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Solution Overview
Problem
Current mobile communication systems face challenges in efficiently handling handovers between LTE and UTRAN networks, particularly when only small data is being transmitted, leading to unnecessary data connection establishment in the UTRAN during handovers, resulting in resource waste.
Innovation Solution
An optimized handover procedure is implemented where the mobile node determines whether to establish a data connection in the UTRAN based on usage statistics and priority values, allowing only a signaling connection if no data connection is needed, thereby avoiding resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a data connection is established in UTRAN during handover, then data transmission capability is ensured, but resource consumption increases unnecessarily when only small data is being transmitted
Solution Approach 1:
The patent applies dynamics by making the data connection establishment conditional rather than static. The mobile node dynamically decides whether to establish a data connection in UTRAN based on real-time assessment of data transmission requirements, usage statistics, and priority values. This dynamic approach ensures data transmission capability when needed while avoiding unnecessary resource consumption when only small data is being transmitted.
Solution Approach 2:
The patent utilizes parameter changes by introducing usage statistics and priority values as decision parameters. The mobile node changes its behavior parameter (data connection establishment) based on these varying parameters. When priority is high or usage statistics indicate significant data transmission needs, the data connection is established; otherwise, only a signaling connection is maintained, thus optimizing resource usage.
2Adaptability or versatility
If a data connection is established during handover, then data transmission is supported, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by establishing only what is necessary - a signaling connection without a full data connection when small data transmission is sufficient. This partial approach provides the adaptability to support data transmission when needed while minimizing signaling overhead by avoiding unnecessary data connection establishment procedures.
Solution Approach 2:
The mobile node changes its connection establishment parameter based on priority values and usage statistics. When these parameters indicate low data transmission requirements, the node opts for signaling-only connection, thereby reducing signaling overhead while maintaining the capability to establish full data connections when adaptability requirements increase.
3Loss of energy
If usage statistics and priority values are evaluated, then resource optimization is achieved, but decision complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining usage statistics thresholds and priority value criteria before the handover decision is made. These preliminary parameters simplify the decision-making process during handover, as the mobile node only needs to compare current conditions against pre-established criteria rather than performing complex real-time analysis, thus achieving resource optimization without excessive decision complexity.
Data Source
AI summary
A method performed by a connectivity-related network entity is provided. The method includes: receiving, from a Packet Data Network (PDN) gateway and a Serving Gateway (SGW), a Short Message Service (SMS) message to be sent in a downlink; determining to use a control plane only, out of the control plane and a user plane, for transferring the SMS message; transmitting a trigger message to a user equipment to initiate establishment of connectivity with the user equipment via the control plane only and not via the user plane, wherein the user equipment starts a timer when the establishment of the control plane connectivity is initiated; receiving a response message from the user equipment; encapsulating the SMS message in a security protected Non-Access Stratum (NAS) message; and transmitting the security protected NAS message to the user equipment, in receipt of which the user equipment stops the timer.