Adaptive Packet TTL Control in Time-Slotted Relay Networks
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Solution Overview
Problem
In wireless communications networks, especially in mobile ad hoc networks, the traditional methods for managing packet transmission lead to increased latency and collisions due to the reliance on point-to-point link abstraction, which is inefficient for multi-hop data transfers, particularly in applications like voice and video transmission.
Innovation Solution
The implementation of on-demand adaptation of packet time-to-live (TTL) in time-slotted barrage relay networks, where the TTL is dynamically adjusted based on the path distance and link state information to control the number of hops and enhance transmission efficiency, allowing for simultaneous data transmission from multiple source nodes without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional point-to-point link abstraction is used for packet transmission, then network simplicity is maintained, but collision probability increases and transmission efficiency decreases
Solution Approach 1:
The patent applies dynamics by making the time-to-live (TTL) value dynamic rather than static. The TTL is adapted on-demand based on current network conditions, path distance, and link state information. This allows the system to transition from a simple fixed-TTL approach to a dynamic adaptive-TTL mechanism that resolves the contradiction between simplicity and collision avoidance.
Solution Approach 2:
The patent changes the parameter of TTL from a fixed value to an adaptive parameter that varies based on path distance and network conditions. By modifying this key parameter dynamically, the system achieves better collision avoidance and transmission efficiency without fundamentally changing the network architecture.
2Ease of operation
If fixed time-to-live value is used for all packets, then network operation is simplified, but transmission efficiency and resource utilization deteriorate
Solution Approach 1:
The system transitions from a static fixed-TTL operation to a dynamic adaptive-TTL mechanism. The TTL is now determined on-demand based on actual path distance and network conditions, allowing each packet to have an optimized TTL value that maximizes transmission efficiency while maintaining operational simplicity through automated adaptation.
Solution Approach 2:
The patent implements feedback mechanisms where nodes exchange path distance and link state information to determine appropriate TTL values. This feedback loop allows the system to automatically adjust TTL parameters based on real-time network conditions, improving transmission efficiency without requiring complex manual intervention.
3Reliability
If on-demand adaptation of packet TTL is implemented, then collision probability decreases and transmission efficiency increases, but path determination complexity increases
Solution Approach 1:
The patent applies preliminary action by having nodes pre-establish and maintain network topology information and path distance data before actual data transmission occurs. This pre-computed information is then used during on-demand TTL adaptation, allowing the system to avoid complex real-time path determination while still achieving efficient adaptive TTL values.
Data Source
AI summary
Methods and systems for on-demand adaptation of packet time-to-live in time-slotted barrage relay networks are disclosed. For example, one disclosed method includes: transmitting a first packet from a first node in a wireless ad hoc network to a second node in the wireless ad hoc network; determining a first path distance, in terms of number of hops, from the first node to the second node, based on the first packet transmission; transmitting a second packet from the second node to the first node, wherein the second packet includes content representing the first path distance; and determining a time-to-live value for subsequent transfers from the first node to the second node, by taking into account the first path distance, wherein the time-to-live value limits the number of hops each packet is allowed to take in subsequent transfers from the first node to the second node.