CPRI Node Reset via End-Point REC Intermediary
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Solution Overview
Problem
Resetting all nodes within a CPRI chain is complex when the REC node initiating the reset is not located at the uplink end, requiring additional intervention and multiple reset commands, which is undesirable and not in line with customer needs for a single reset command across various CPRI architectures.
Innovation Solution
A method where an end-point REC node receives a reset notification and transmits a reset notification with a reset bit set for at least ten hyperframes, allowing the reset to propagate through the chain, enabling a single reset command to initiate a reset of all nodes, adhering to CPRI specifications for reset request and acknowledgement notifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a networking REC node initiates the reset, then the reset can be initiated from any location in the CPRI chain, but multiple reset commands and additional intervention are required to propagate the reset through the chain
Solution Approach 1:
The patent introduces an intermediary mechanism where the networking REC node receives a reset command and automatically generates and transmits the necessary reset request notifications to downstream nodes and reset acknowledgement notifications to upstream nodes. This intermediary role simplifies the overall reset process by having the networking REC node manage the complex multi-command sequence internally, presenting a simple single-command interface to the operator while handling the complexity of propagation through the CPRI chain.
2Reliability
If additional reset commands are required for propagation, then complete reset coverage is achieved, but the reset process requires undesired additional intervention
Solution Approach 1:
The networking REC node performs self-service by automatically generating and transmitting all necessary reset commands and acknowledgements in response to a single received reset command. Instead of requiring external intervention to manage multiple reset commands across different nodes, the networking REC node autonomously handles the entire reset propagation process, ensuring complete reset coverage while maintaining operational simplicity for the user.
3Manufacturing precision
If reset bit is set for at least ten hyperframes, then compliance with CPRI specifications is ensured, but the reset notification duration is extended
Solution Approach 1:
The patent specifies that the reset bit shall be set for at least ten hyperframes in the reset request notification transmitted from the networking REC node to downstream nodes. This parameter change ensures compliance with CPRI specifications while maintaining a controlled and defined duration for the reset notification. The ten hyperframe duration provides sufficient time for all nodes in the CPRI chain to receive and process the reset command while establishing a clear temporal boundary for the reset operation.
Data Source
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AI summary
A method of resetting at least one node within a Common Public Radio Interface (CPRI) radio base station system is described. The method comprises, at an end-point Radio Equipment Controller (REC) node within the CPRI radio base station system, receiving on a slave port a reset notification, and in response thereto transmitting on the slave port a reset notification comprising a reset bit being set within at least ten hyperframes.