Spanning Tree Selection in Ad Hoc Rendering Networks
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Solution Overview
Problem
In ad hoc rendering networks, where devices operate independently and connectivity between them changes dynamically, existing technologies face challenges in efficiently routing data and maintaining coordinated media rendering due to fluctuating communication links and lack of centralized control.
Innovation Solution
The technique involves detecting changes in connectivity between devices, storing cost information in data records, and calculating spanning trees from candidate communication links to determine the most efficient paths for data routing, using conflict-free replicated data types (CRDTs) to ensure consistent and conflict-free updates across the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If devices operate independently in an ad hoc network without centralized control, then device autonomy and flexibility are improved, but routing efficiency and coordination capability deteriorate due to complex communication link management
Solution Approach 1:
Each device independently calculates its own spanning tree using locally stored cost information and CRDT data structures. Devices autonomously determine optimal communication paths without requiring centralized control, allowing each node to self-manage its routing decisions while maintaining network-wide coordination through distributed consensus on link costs
Solution Approach 2:
The system dynamically adjusts link cost parameters based on changing network conditions such as connectivity status and device characteristics. By modifying these cost parameters in real-time and recalculating spanning trees, the network adapts to dynamic conditions while maintaining efficient routing paths without centralized intervention
2Adaptability or versatility
If communication links are added dynamically to expand network connectivity, then network coverage and device interconnectivity are improved, but routing complexity and message overhead increase
Solution Approach 1:
The spanning tree structure dynamically adapts as communication links are added or removed from the network. When new links become available, devices update their local cost information and recalculate spanning trees to incorporate these new paths. This dynamic recalculation ensures the routing structure automatically optimizes itself for current network conditions without manual intervention or increased complexity
Solution Approach 2:
Devices continuously monitor and update their local CRDT data structures with current link cost information and connectivity status. This feedback mechanism allows each device to maintain an accurate view of the network state and adjust its spanning tree calculations accordingly, enabling the system to respond automatically to changing connectivity conditions while maintaining routing efficiency
3Productivity
If spanning trees are recalculated frequently to adapt to changing connectivity, then routing efficiency is improved, but computational overhead and processing time increase
Solution Approach 1:
Instead of requiring all devices to recalculate spanning trees simultaneously whenever any link changes, the system allows devices to update their local CRDT data structures independently and asynchronously. Each device performs partial recalculations based on its local observations and received updates, rather than forcing complete network-wide recalculation. This approach achieves sufficient routing efficiency improvements without the excessive processing overhead of full recalculation cycles
Data Source
AI summary
Techniques are disclosed for developing spanning trees at devices that are interconnected in a rendering network. According to the techniques, a change in connectivity between two devices in the rendering network may be detected at a first one of the devices, information representing a cost of connectivity may be stored in a data record at the first device. A spanning tree may then be calculated from a candidate set of communication links that interconnect the devices of the rendering network according to cost information representing those communication links. A device may exchange information, such as information regarding the rendering network, to another device of the rendering network according to communication links identified for the spanning tree. The data record may be of a conflict-free replicated data type.