eNodeB Transmission Mode Steering via X2 Signaling
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Solution Overview
Problem
In LTE networks, eNodeBs lack information about neighboring cells' transmission mode capabilities, leading to unnecessary movement of UEs to cells that cannot support higher data throughput, resulting in decreased service quality for UEs that could benefit from Transmission Mode 9 (TM9) configurations.
Innovation Solution
Implementing a method to exchange transmission mode configuration information between eNodeBs through messages during X2 setup and configuration updates, including indicators for TM9 capability, allowing eNodeBs to steer UEs to cells with higher data throughput support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If eNodeBs exchange transmission mode configuration information through X2 interface messages, then data throughput is improved by enabling UEs to be steered to TM9 capable cells, but device complexity increases due to additional information exchange and processing requirements
Solution Approach 1:
The patent uses the X2 interface as an intermediary mechanism between eNodeBs to exchange transmission mode configuration information. This mediator enables indirect information sharing about TM9 capabilities without requiring direct complex interactions between all network elements, thus improving throughput while managing complexity through a standardized communication channel
Solution Approach 2:
The patent implements preliminary action by including transmission mode configuration indicators in X2 SETUP REQUEST and X2 SETUP RESPONSE messages during the initial network setup phase. This allows eNodeBs to proactively share TM9 capability information before UEs need to be steered, enabling informed routing decisions without real-time complexity
2Reliability
If transmission mode configuration information is included in X2 setup and configuration update messages, then service quality is improved by preventing unnecessary UE movements, but loss of information increases due to additional signaling overhead
Solution Approach 1:
The patent extracts only the essential transmission mode configuration indicators (such as TM9 capability flags) from the complete transmission mode configuration data and includes only these critical elements in the X2 signaling messages. This selective extraction prevents unnecessary UE movements by providing sufficient information while minimizing signaling overhead and information loss
3Productivity
If eNodeBs steer UEs based on transmission mode capability information, then resource allocation efficiency is improved by prioritizing TM9 capable cells, but ease of operation decreases due to more complex mobility management procedures
Solution Approach 1:
The patent implements self-service by enabling eNodeBs to autonomously make routing decisions based on the exchanged transmission mode configuration information. Each eNodeB independently evaluates UE suitability for TM9 and performs steering decisions without requiring complex centralized coordination, thus improving resource allocation efficiency while maintaining operational simplicity through decentralized intelligence
Data Source
AI summary
Methods performed by a network node having a first transmission mode configuration for a first cell in a radio access network may be provided. A second transmission mode configuration for a second cell may be obtained. A mobile terminal may be steered to the first or second cell based on which cell has the transmission mode configuration for supporting a higher data throughput. A method performed by a control node in a radio access network also may be provided. A first and a second transmission mode configuration may be determined for a candidate cell and a serving cell, respectively. A serving node may be configured with the first transmission mode configuration. A mobile terminal may be steered to the candidate cell or the serving cell based on which cell has the transmission mode configuration for supporting a higher data throughput.