Capillary Network Message Box Selection for Mobile Devices
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Solution Overview
Problem
In capillary networks, machine devices (MDs) face challenges with reachability information management when they are both sleeping and mobile, as they may change capillary network gateways unpredictably, leading to inefficient communication and energy consumption.
Innovation Solution
A method is introduced to select a message box for MDs based on the probability of capillary network gateway changes between data transmission events, with highly mobile devices using a message box located higher up in the wireless network for guaranteed reachability and static or less mobile devices using a message box closer to the MD to minimize round trip delay and conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a message box is located closer to the machine device, then round trip delay is reduced and energy efficiency is improved, but reachability reliability deteriorates when the device changes gateways
Solution Approach 1:
The system assigns different message box locations to different devices based on their individual mobility characteristics. Static or low-mobility devices are assigned message boxes in lower network nodes (closer to the device), while high-mobility devices are assigned message boxes in higher network nodes (farther from the device). This localized differentiation resolves the contradiction by optimizing for energy efficiency for static devices while ensuring reachability reliability for mobile devices.
Solution Approach 2:
The message box location is not fixed but dynamically selected based on the device's mobility probability. The system calculates a mobility probability for each device and uses this to determine the appropriate message box location. This dynamic adaptation allows the system to balance energy efficiency and reachability reliability according to each device's actual behavior patterns.
2Reliability
If a message box is located higher up in the network, then reachability is guaranteed for mobile devices, but round trip delay increases and energy consumption rises
Solution Approach 1:
Instead of uniformly placing message boxes in high network nodes for all devices, the system applies local quality by differentiating message box locations based on individual device characteristics. Only devices with high calculated mobility probabilities are assigned message boxes in higher network nodes, while static devices receive message boxes in lower nodes, thus avoiding unnecessary energy consumption and delay.
Solution Approach 2:
The system dynamically determines message box location based on real-time or historical mobility data. By calculating mobility probability and using this to select appropriate message box locations, the system ensures that higher network nodes are only used when necessary for reachability, thereby minimizing overall energy consumption and round trip delay.
3Use of energy by moving object
If the machine device remains in sleep mode longer, then energy consumption is reduced, but communication responsiveness deteriorates
Solution Approach 1:
The system performs preliminary action by calculating the mobility probability in advance and using this information to select the optimal message box location before communication events occur. This pre-positioning of the message box ensures that when the device wakes from sleep, communication can proceed efficiently with minimal delay, thus resolving the contradiction between extended sleep time and communication responsiveness.
Data Source
AI summary
A method in a node of a communication system for selecting a message box for a machine device. The communication system comprises one or more capillary networks and a wireless network, the one or more capillary networks comprising one or more machine devices and at least two capillary network gateways. The at least two capillary network gateways are capable of data exchange between the machine device and the wireless network. The method comprises establishing, for the machine device, a first probability reflecting the probability that the machine device changes capillary network gateway between two consecutive data transmission events performed by the machine device, and selecting, based on the first probability, a message box for use by the machine device. Further described are a corresponding node, computer programs and computer program products.