Ad Hoc Peer-to-Peer Network Timing Synchronization
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Solution Overview
Problem
In ad hoc peer-to-peer wireless communication networks, timing discrepancies between nodes can cause synchronization issues, affecting communication functions such as peer discovery and data transfer, as nodes may receive timing references from different sources with varying offsets, leading to potential communication failures.
Innovation Solution
Each node in the network receives a timing reference from a nearby source and transmits a wideband signal during a dedicated time interval, while listening for signals from other nodes during the remaining time. It adjusts its timing based on the received timing from other nodes and the network timing, using methods like averaging or dead zone considerations to synchronize with nearby devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If nodes receive timing references from different sources in a peer-to-peer network, then network adaptability and distributed operation are improved, but timing synchronization and communication reliability deteriorate due to timing offsets between nodes
Solution Approach 1:
Each node transmits a beacon signal containing its timing reference and listens for beacon signals from other nodes. Nodes compare received timing references with their own, calculate timing offsets, and adjust their timing accordingly through continuous feedback loops, resolving the synchronization issue while maintaining distributed operation
Solution Approach 2:
Nodes dynamically adjust their timing parameters by calculating offsets between their transmitted timing reference and received timing references from other nodes. This parameter adjustment allows nodes to synchronize despite receiving timing from different sources, maintaining both adaptability and reliability
2Measurement precision
If nodes continuously adjust timing based on received signals, then timing synchronization accuracy is improved, but communication overhead and energy consumption increase
Solution Approach 1:
Nodes perform timing adjustments periodically at scheduled intervals rather than continuously. Each node has designated time slots for transmitting beacon signals and listening for other nodes' beacons, reducing energy consumption while maintaining synchronization accuracy through periodic measurements and adjustments
3Measurement precision
If nodes transmit beacon signals frequently for synchronization, then timing offset detection precision is improved, but network interference and collision probability increase
Solution Approach 1:
The network divides time into discrete slots, with each node assigned specific time slots for transmitting beacon signals. This segmentation of transmission opportunities reduces signal interference and collisions while maintaining sufficient measurement precision for timing offset detection through the structured timing framework
Data Source
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AI summary
In an ad hoc peer-to-peer communications network, timing synchronization can be facilitated between nodes as a function of a received timing of nearby nodes, as well as a network timing. A first timing reference can be used to determine a symbol timing. A second signal that includes a second timing reference can be used to determine a difference between the symbol timing and the second timing reference. The difference can be used to adjust a symbol timing, which can be transmitted to nearby nodes. The first timing reference and the second timing reference can be received from different sources.