Small Data Mobility Optimization in LTE Networks
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Solution Overview
Problem
Existing LTE protocols incur high signaling costs and inefficiencies when handling small data transmissions due to the need for complete signaling processes, leading to increased network complexity and failure in optimizing small data transmission methods across different network versions and UE types.
Innovation Solution
A mobility optimization method where a UE with a small data feature performs cell reselection based on a small data priority principle, prioritizing cells with optimized small data processing capabilities, and accelerates or delays reselection accordingly to reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complete signaling process is established for small data transmission in existing LTE protocols, then data transmission can be completed, but signaling cost becomes extremely high compared to the amount of transmitted data
Solution Approach 1:
The network pre-configures small data transmission resources and parameters for UE before actual data transmission occurs. This includes pre-allocating uplink grants, configuring small data buffers, and setting up measurement parameters, so that when small data needs to be transmitted, the UE can immediately use these pre-prepared resources without going through complete signaling establishment procedures.
Solution Approach 2:
The patent extracts and separates small data transmission from the complete signaling process. Instead of requiring full RRC connection establishment and resource allocation procedures, the system creates a simplified transmission path that uses only the essential minimum signaling elements specifically designed for small data, thereby removing unnecessary signaling overhead while maintaining transmission reliability.
2Adaptability or versatility
If different versions of network and UE or different strategies of operators are used, then network diversity is achieved, but transmission failure occurs and complexity in network processing increases
Solution Approach 1:
The patent designs a universal small data transmission mechanism that can operate across different network versions and operator strategies. The same core mechanism (pre-configured resources, simplified signaling path, small data buffer) can be applied whether the network supports optimized small data transmission or not, and regardless of operator-specific strategies, thereby achieving broad compatibility without requiring separate processing logic for each scenario.
Solution Approach 2:
The system dynamically adjusts transmission parameters based on network capabilities and UE characteristics. By changing parameters such as resource allocation size, signaling configuration, and buffer settings according to the specific network version and operator strategy being used, the system maintains compatibility across diverse environments while keeping processing complexity manageable through parameterization rather than structural complexity.
3Ease of operation
If cell reselection is performed according to highest frequency priority in existing protocols, then cell selection is simplified, but UE with small data transmission feature cannot be preferentially reselected to network supporting optimized small data transmission method
Solution Approach 1:
The patent segments the cell reselection process into two independent parts: frequency priority evaluation and small data capability evaluation. The UE first identifies candidate cells based on frequency priority, then separately evaluates which of these candidates support optimized small data transmission. This segmentation allows the system to maintain the simplicity of frequency-based reselection while adding the capability to preferentially select cells with small data optimization support through an additional evaluation layer.
Solution Approach 2:
The UE performs preliminary identification of cells supporting optimized small data transmission capability before final reselection decision is made. By pre-screening candidate cells for small data capability and marking them accordingly, the system enables the UE to preferentially select among capable cells while still following the overall frequency priority framework, thus maintaining simplicity while improving small data transmission efficiency.
Data Source
AI summary
Disclosed in the present disclosure is a mobility optimization method. The method includes that a User Equipment (UE) having a small data feature performs, when determining that a cell supporting an optimized small data processing capability exists in candidate cells during execution of cell reselection, the cell reselection according to information of a small data priority cell reselection principle. Also disclosed is another mobility optimization method, including that a network side provides cell reselection information to a UE having a small data feature and normally residing in a cell; the cell reselection information includes information of a reselection principle including a small data processing capability factor and/or capability information indicating whether a network supports optimized small data processing or not; during execution of switching, a target Evolved Node B (eNB) having an optimized small data processing capability and satisfying a switching condition is selected preferentially for the UE having the small data feature, and a switching request message is sent to the selected target eNB. Also disclosed are a UE and an access network device.