Series-Connected Radio Interface with Selective Twisted-Pair Lanes
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Solution Overview
Problem
Distributed wireless systems with series-connected antenna processing units (APUs) face limitations in power consumption and vulnerability to single points of failure due to the need for all interfaces to be operational, even when only a few APUs are actively transmitting or receiving, which restricts the maximum number of connectable APUs and system robustness.
Innovation Solution
Implementing a modified Ethernet interface where each APU terminates only one or two twisted-pair lanes, allowing data and power to be transmitted through separate subsets of twisted-pair lanes, reducing idle power consumption and enhancing system robustness by isolating failures to affect only half or quarter of the APUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all interfaces in series-connected APUs are kept operational to maintain system functionality, then system reliability is improved, but power consumption increases and device complexity increases
Solution Approach 1:
The patent segments the interface operations by implementing separate uplink and downstream interfaces at each APU, with selective termination of twisted-pair lanes. This allows different portions of the interface to be activated or deactivated independently based on operational needs, enabling power reduction while maintaining necessary connectivity.
Solution Approach 2:
The patent implements dynamic interface management where APUs can selectively activate or deactivate their interfaces based on whether they are actively transmitting or receiving. The system transitions from a static all-or-nothing interface configuration to a dynamic one where interface states adapt to current operational requirements.
2Reliability
If all interfaces in series-connected APUs are kept operational to maintain system functionality, then system reliability is improved, but device complexity increases
Solution Approach 1:
The interface is segmented into separate uplink and downstream directions with independent twisted-pair lane termination at each APU. This segmentation simplifies the operational complexity by allowing selective activation of interface portions rather than managing complex full-duplex operations across all lanes simultaneously.
Solution Approach 2:
Different APUs in the series connection have different interface configurations tailored to their specific positions and functions. Upstream APUs terminate certain lanes while downstream APUs terminate different lanes, creating local quality variations that reduce overall system complexity by matching interface capabilities to actual operational needs at each location.
3Adaptability or versatility
If maximum number of APUs are connected in series to expand system coverage, then system versatility is improved, but vulnerability to single points of failure increases
Solution Approach 1:
The series-connected APU system is segmented into independent interface segments with selective lane termination. This creates isolated failure zones where a problem in one segment does not propagate to other segments, reducing the vulnerability to single points of failure while maintaining the ability to connect maximum number of APUs.
4Use of energy by moving object
If selective termination of twisted-pair lanes is implemented to reduce power consumption, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The twisted-pair lanes are segmented into separate uplink and downstream groups with independent termination control at each APU. This segmentation provides a straightforward method for power reduction by simply deactivating unused lanes rather than implementing complex power management across all lanes, thus reducing energy consumption without significantly increasing device complexity.
Data Source
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AI summary
A distributed wireless system comprises controlling node and two or more antenna processing nodes communicatively coupled to the controlling node but spatially separated from each other and from the controlling node. The controlling node sends commands to and exchanges data with a first subset of the antenna processing nodes, using a first twisted-pair lane of a physical layer interface having four twisted-pair lanes, and sends commands to and exchanging data with a second subset of the antenna processing nodes, using a second twisted-pair lane. In some embodiments, the controlling node also uses a third twisted-pair lane for communicating with the first subset, while using the fourth twisted-pair lane for communicating with the second subset. Corresponding antenna processing nodes terminate one or two twisted-pair lanes in a direction towards the controlling node, while terminating one or two twisted-pair lanes towards one or more antenna processing nodes further from the controlling node.