CPRI Controller Dynamic IQ Data Stream Reconfiguration
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Solution Overview
Problem
Current CPRI controllers require static allocation of IQ data streams between radio equipment control (REC) and radio equipment (RE) nodes, leading to inefficient power usage during varying network loads, as reconfiguration is slow and dependent on both REC and RE chains, making it difficult to dynamically adjust resource allocation based on changing load conditions.
Innovation Solution
Implementing a system that allows on-the-fly reconfiguration of IQ data stream allocation between RECs in a chain configuration, enabling dynamic power management by reallocating and disabling antenna carrier streams without interrupting communications, using advanced mapping methods and DMA modules to optimize resource usage based on current load demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static allocation of IQ data streams is used between REC and RE nodes, then system stability and simplicity are maintained, but power efficiency deteriorates during varying network loads
Solution Approach 1:
The patent implements dynamic allocation of IQ data streams between REC and RE nodes, allowing the system to adapt resource distribution based on varying network load conditions. This enables power-saving modes during low traffic while maintaining performance during high traffic, resolving the contradiction between stability and power efficiency.
Solution Approach 2:
The system changes operational parameters (data stream allocation, processing mode) based on network load conditions. By monitoring traffic levels and adjusting resource allocation parameters dynamically, the system achieves both stability through controlled changes and power efficiency through load-adaptive operation.
2Use of energy by moving object
If reconfiguration of IQ data stream allocation is implemented, then power efficiency during varying loads is improved, but system complexity and reconfiguration time increase
Solution Approach 1:
The patent pre-configures multiple allocation schemes and processing modes in advance. When load conditions change, the system switches between pre-prepared configurations rather than computing new allocations in real-time, reducing reconfiguration complexity while maintaining power efficiency benefits.
3Adaptability or versatility
If dynamic reallocation of antenna carrier streams is implemented, then adaptability to changing load conditions is improved, but risk of communication interruption increases
Solution Approach 1:
The system prepares backup allocation configurations and maintains buffer resources in advance. During reallocation, these pre-prepared resources cushion against potential interruptions, ensuring communication continuity while enabling dynamic adaptation to load changes.
4Loss of energy
If resource allocation is adjusted based on network load, then power consumption during low-traffic periods is reduced, but control system complexity increases
Solution Approach 1:
The system implements self-service through automated load monitoring and autonomous resource allocation adjustment. The control system automatically detects traffic levels and reconfigures resources without manual intervention, reducing power consumption while keeping control complexity manageable through automation rather than complex manual control mechanisms.
Data Source
AI summary
An apparatus for facilitating the re-distribution of processing load between a plurality of radio equipment controllers arranged in a daisy chain configuration on a Common Public Radio Interface. The apparatus may be included in each REC and has two framers which may co-operate to forward IQ data of antenna carriers received on a downlink from a preceding REC to a subsequent REC in the chain and a DMA module or channel which can read IQ data from a system memory for onward transmission. In a re-allocation mode, the framer may be reconfigured so that an AxC initially allocated to a preceding REC for processing may be instead, accessed by a second (usually redundant) transmit DMA module included in the apparatus from system memory and transferred to the framer for onward transmission.