DECT ULE Reachability Detection to Limit Wasted Retransmissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing DECT ULE standards do not limit the number of retransmissions by a base station when attempting to communicate with a portable device that is offline or out of range, leading to wastage of resources such as power, memory, and processing resources.
Innovation Solution
Implementing a method where a base station determines reachability by listening for a response threshold period without receiving an acknowledgement, and upon determining the device is unreachable, refrains from further retransmissions and removes messages from the transmission queue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station repeatedly retransmits messages to portable devices that are offline or beyond wireless communication range, then the base station ensures message delivery reliability, but base station resources (memory, power, and processing resources) are significantly consumed
Solution Approach 1:
The base station performs reachability detection by transmitting a reachability detection message and listening for a response before attempting to deliver actual data messages. This preliminary action identifies unreachable devices in advance, preventing wasted retransmission attempts and conserving base station power and processing resources.
Solution Approach 2:
The system implements feedback through the reachability detection mechanism where the base station sends a detection message and waits for a response. The presence or absence of a response provides feedback about device reachability, enabling the base station to adjust its message delivery strategy accordingly and avoid unnecessary resource consumption on unreachable devices.
2Reliability
If the base station repeatedly retransmits messages to portable devices that are offline or beyond wireless communication range, then the base station ensures message delivery reliability, but base station processing resources are significantly consumed
Solution Approach 1:
The base station performs reachability detection by transmitting a reachability detection message and listening for a response before attempting to deliver actual data messages. This preliminary action identifies unreachable devices in advance, preventing wasted retransmission attempts and conserving base station processing resources for productive tasks.
Solution Approach 2:
The system implements feedback through the reachability detection mechanism where the base station sends a detection message and waits for a response. The presence or absence of a response provides feedback about device reachability, enabling the base station to adjust its message delivery strategy accordingly and avoid unnecessary resource consumption on unreachable devices.
3Use of energy by moving object
If the base station listens for a response threshold period to determine device reachability, then base station resources are conserved by avoiding unnecessary retransmissions, but communication latency increases
Solution Approach 1:
The base station performs a limited reachability detection by transmitting a single detection message and listening for a response within a threshold period. This partial action (one detection attempt rather than multiple) balances resource conservation with acceptable detection accuracy, avoiding excessive time consumption while still identifying clearly unreachable devices.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
This disclosure provides methods, devices, and systems for wireless communications. The present implementations more specifically relate to techniques for detecting a reachability of portable devices in a digital enhanced cordless telecommunications (DECT) ultra low energy (ULE) home automation networks (HAN). In some aspects, a base station may determine that a portable device is unreachable after failing to receive an ACK from the device after a threshold number of retransmissions or a threshold amount of time has elapsed. Upon determining that a portable device is unreachable, the base station may remove any messages intended for the device from its transmission queue and may refrain from processing any further transmissions to the device. A base station may determine that a portable device is reachable again after receiving a communication from the device. In some implementations, a base station may notify a host application or processor about the reachability of the portable devices.