Multi-Node Base Station Leaf Node Addition Timing Management
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Solution Overview
Problem
Adding a new subsystem node to a distributed base station in wireless telecommunications networks can disrupt timing arrangements, leading to unpredictable failures and potential loss of radio access network functionality due to the need for careful signaling management in CPRI links.
Innovation Solution
A method for dynamically adding a leaf node to a multi-node base station system by enabling a second lane in the active radio access node, measuring frame timing differences, establishing synchronization, and setting user plane data parameters, allowing seamless integration with existing nodes without disrupting the timing or data planes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a new subsystem node is added to a distributed base station, then the network capacity and scalability are improved, but the timing arrangement is disrupted and reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by establishing a new CPRI link in a separate second lane before integrating it into the existing multi-node chain. The new leaf node is first configured and synchronized in isolation, then seamlessly merged with the active network. This preliminary setup prevents timing disruptions to existing nodes while enabling network expansion.
Solution Approach 2:
The patent segments the CPRI interface into multiple lanes, using a second lane for adding new nodes while keeping the first lane operational for existing network traffic. This segmentation allows independent configuration of new nodes without affecting the timing arrangements of established subsystems, thus maintaining reliability during scalability improvements.
2Ease of operation
If a new subsystem node is added to maintain predictable timing flows, then the signaling arrangement is simplified, but the device complexity increases
Solution Approach 1:
The patent makes the active radio access node universal by enabling it to handle both its original function in the first lane and the new function of accommodating a leaf node in the second lane. The node's framing and timing mechanisms are designed to work across both lanes, simplifying the overall configuration despite the increased device complexity.
Solution Approach 2:
The patent introduces a second lane as an intermediary channel that facilitates the addition of new nodes without directly complicating the existing signaling between established nodes. This intermediary lane absorbs the complexity of new node integration, keeping the original signaling arrangement simple and predictable.
3Productivity
If a new subsystem node is added to expand network coverage, then the radio access network capacity is improved, but the control bandwidth and software impact increase
Solution Approach 1:
The patent segments control and user plane traffic across multiple lanes, allowing the addition of new nodes without proportionally increasing control bandwidth consumption. The second lane handles new node configuration independently, preventing control signals from congesting the existing network infrastructure.
Solution Approach 2:
The patent enables the new leaf node to self-configure and self-synchronize by measuring its own timing differences and automatically adjusting its framing. This self-service capability reduces the control bandwidth required for manual configuration and minimizes software processing overhead while expanding network capacity.
Data Source
AI summary
Adding a new subsystem node to a multi-node base station topology (e.g., a chain or tree topology) in a telecommunications network can disrupt the effective operation of the existing multi-node base station. By accurately measuring the timing difference between uplink and downlink signaling across a current terminating node during the configuration of the new terminating node, the new node can be added with reduced impact upon the operation of the existing base station nodes.