BLE Neighbor Discovery Estimation Under Advertising Packet Collisions
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Solution Overview
Problem
The increased number of advertising devices in Bluetooth Low Energy (BLE) networks leads to higher inter-packet collisions, reducing the probability that scanners can recognize advertising devices, which hampers smooth operation of IoT applications.
Innovation Solution
A method and apparatus for estimating the number of advertising devices using an extended neighbor discovery process (E-NDP) by receiving and analyzing extended advertising data packets and data packets, employing candidate values and measurement values to enhance device recognition probability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of advertising devices increases, then the service coverage and functionality are improved, but the inter-packet collision probability increases and device recognition reliability deteriorates
Solution Approach 1:
The patent segments the advertising packet transmission process by introducing extended advertising events that include timing information and channel hopping patterns. This divides the originally collision-prone continuous transmission into structured, time-synchronized segments that reduce inter-packet collisions while maintaining support for multiple advertising devices
Solution Approach 2:
The patent implements periodic advertising events with defined intervals and timing relationships. Advertising devices transmit at periodic intervals with synchronized timing, and scanners perform measurements at specific periodic moments, creating a structured rhythm that reduces random collisions while maintaining comprehensive device discovery coverage
2Productivity
If the number of extended advertising packets increases, then the neighbor discovery capability is improved, but the inter-packet collision possibility increases
Solution Approach 1:
The patent employs feedback mechanisms where scanners measure advertising packet characteristics and report back to advertising devices. This feedback loop enables dynamic adjustment of transmission parameters such as timing offsets and channel selection, reducing inter-packet collisions while maintaining high neighbor discovery capability
Solution Approach 2:
The patent changes key transmission parameters including timing offsets, channel hopping patterns, and transmission power levels based on measured collision rates and device density. These parameter adjustments optimize the balance between discovery capability and collision reduction in real-time operating conditions
3Measurement precision
If the scanner measures all advertising packets, then the device recognition accuracy is improved, but the measurement time and processing complexity increase
Solution Approach 1:
The patent performs preliminary filtering and pre-processing of advertising packets based on timing information and channel predictions before full measurement. Scanners use advance knowledge of expected packet arrival times and channels to prepare measurement windows, reducing actual measurement time while maintaining recognition accuracy
Solution Approach 2:
The patent implements a two-stage measurement approach where scanners first perform partial measurements on a subset of packets using timing filters, then perform complete measurements only on packets that pass initial validation. This partial action approach reduces overall measurement time while maintaining accuracy for critical device recognition
Data Source
AI summary
Provided are a method of estimating of the number of Bluetooth low energy (BLE) in an extended neighbor discovery process and an apparatus thereof, and a method of estimating the number of extended BLE may receive extended advertising data packets and data packets from a plurality of advertising devices, respectively based on a predetermined cycle, acquire a first candidate value, a second candidate value, and a third candidate value for the number of plural advertising devices based on a first measurement value for the number of extended advertising data packets measured, a second measurement value for the number of data packets measured based on the predetermined cycle, and a third measurement value for the number of advertising devices measured based on the predetermined cycle, and acquire information on the number of plural advertising devices based on information on the number of extended advertising data packets, information on the number of data packets, and information on the number of advertising devices related to the first candidate value, information on the number of extended advertising data packets, information on the number of data packets, and information on the number of advertising devices related to the second candidate value, and information on the number of extended advertising data packets, information on the number of data packets, and information on the number of advertising devices related to the third candidate value.