VNDN Forwarding With Name Centrality and RSSI for Broadcast Control
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Solution Overview
Problem
The existing Vehicle Named Data Networking (VNDN) technology experiences a data broadcast storm due to broadcast characteristics of wireless media, leading to network congestion, bandwidth wastage, and packet loss, which is not effectively addressed by conventional methods.
Innovation Solution
A forwarding method and system that utilizes name centrality and signal strength to select a more limited subset of nodes for data forwarding, reducing data broadcast storms by calculating a weight based on name centrality count data and Received Signal Strength Indicator (RSSI) to determine a potential forwarder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is broadcast to all nodes in VNDN, then all nodes can receive the data packet, but network congestion occurs and bandwidth resources are wasted
Solution Approach 1:
The patent applies local quality by making different nodes have different forwarding behaviors based on their local characteristics. Nodes calculate their name centrality values locally and use these values to determine whether to forward data packets. This selective forwarding based on local node properties (name centrality) reduces unnecessary broadcasts while ensuring data reaches nodes that need it, thus balancing coverage with resource efficiency.
Solution Approach 2:
The patent changes the parameter of data forwarding from a binary decision (forward or not) to a probabilistic decision based on name centrality values. Nodes with higher name centrality have higher forwarding probability, while nodes with lower values have reduced forwarding probability. This parameter-based approach transforms the broadcast mechanism into a controlled diffusion process that adapts to network conditions and node importance.
2Reliability
If data is re-broadcast by all nodes with PIT items, then data reaches more nodes, but data broadcast storm occurs causing packet loss and delay
Solution Approach 1:
The patent makes forwarding decisions based on local node characteristics (name centrality) rather than uniform re-broadcasting. Each node evaluates its own name centrality value and uses this to determine its forwarding behavior. This local differentiation prevents the synchronized re-broadcast that causes broadcast storms, as nodes with lower name centrality reduce their forwarding activity, thereby reducing overall network traffic and delay.
Solution Approach 2:
The patent introduces dynamic forwarding behavior where nodes adjust their forwarding probability based on their name centrality values. This dynamic approach allows the network to adapt to changing conditions - when name centrality values are high, forwarding is more aggressive to ensure coverage; when values are low, forwarding is reduced to prevent broadcast storms. This dynamic adjustment resolves the contradiction between coverage and delay.
3Ease of manufacture
If conventional broadcast method is used, then simple implementation is achieved, but network performance degrades due to broadcast storm
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing name centrality values for each node before data transmission occurs. These pre-computed values are used during data forwarding decisions, eliminating the need for complex real-time calculations during broadcast operations. This preliminary preparation maintains implementation simplicity while enabling the sophisticated selective forwarding needed to prevent broadcast storms and improve network performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed method significantly reduces data broadcast storms, enhances network performance, and maintains high interest satisfaction rates with lower delay, without adding supplementary control overhead.
Implementation Method 1
measuring, by a Received Signal Strength Indicator (RSSI), a power level of signal received from an access point (AP) or any other vehicle in wireless communication
Data Source
AI summary
A forwarding method and system for data broadcast reduction in a Vehicle Named Data Networking (VNDN) is proposed. The method includes (a) setting name centrality (NameCent) count data with respect to an interest packet received by a node of the VNDN; (b) measuring, by a Received Signal Strength Indicator (RSSI), a power level of signal received from an access point (AP) or any other vehicle in wireless communication; (c) calculating a weight of the interest packet for a data forwarder in a current node or a previous node based on the name centrality (NameCent) count data and signal strength measured by the Received Signal Strength Indicator (RSSI); and (d) determining a potential forwarder of a data packet by comparison of variables of the weight calculated in step (c).