ZigBee Green Power Transmission Mode Selection
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Solution Overview
Problem
In wireless mesh networks, particularly with energy-harvesting devices like ZigBee Green Power Devices, there is a challenge in efficiently and flexibly communicating messages to multiple logical entities with disparate reception opportunities, due to limited and discontinuous reception windows, which can lead to difficulties in delivering critical messages and network configuration parameters.
Innovation Solution
A method is proposed that allows for selecting between two transmission modes: one where messages are transmitted during reception opportunities associated with a single logical entity, and another where messages can be sent during combined reception opportunities of multiple entities, enabling faster and more reliable message delivery by optimizing the use of available reception opportunities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If messages are transmitted only during reception opportunities associated with a single logical entity, then the device complexity is reduced and addressing is simplified, but the message delivery speed and reliability deteriorate when reception opportunities for that entity are scarce
Solution Approach 1:
The patent applies universality by allowing a single transmission mechanism to serve multiple logical entities. The transmitting device can send messages during reception opportunities of any logical entity within the wireless device, not just the one specifically addressed. This multi-functional approach enables the same communication infrastructure to reliably deliver messages to multiple entities with disparate reception schedules, resolving the contradiction between simplified addressing and reliable delivery.
Solution Approach 2:
The patent introduces an intermediary mechanism where the transmitting device acts as a mediator that can utilize reception opportunities from multiple logical entities to deliver messages. Instead of being constrained to a single entity's reception schedule, the transmitting device mediates message delivery by selecting appropriate reception opportunities from any logical entity, thereby ensuring reliable delivery without increasing addressing complexity.
2Reliability
If messages are transmitted during combined reception opportunities of multiple logical entities, then the message delivery speed and reliability are improved, but the device complexity and communication scheme complexity increase
Solution Approach 1:
The patent applies universality by enabling a single communication scheme to handle multiple logical entities uniformly. The transmitting device uses a universal approach where messages can be delivered during reception opportunities of any logical entity, regardless of which entity is the ultimate recipient. This eliminates the need for complex entity-specific communication schemes while maintaining high delivery reliability.
Solution Approach 2:
The patent merges the communication opportunities of multiple logical entities into a unified transmission framework. Instead of maintaining separate communication channels for each entity, the system combines reception opportunities from multiple entities, allowing the transmitting device to select from a larger pool of available transmission windows. This merging approach improves delivery reliability without proportionally increasing complexity.
3Device complexity
If a single transceiver is used for multiple logical entities, then the device complexity and cost are reduced, but the ease of operation and flexibility in communicating with multiple entities deteriorate
Solution Approach 1:
The patent applies universality by making a single transceiver multi-functional. The same transceiver handles communication with multiple logical entities by utilizing reception opportunities from any entity. This universal transceiver approach maintains hardware simplicity while achieving the operational flexibility of multiple transceivers, as the single transceiver can adaptively communicate with any logical entity based on their reception schedules.
Solution Approach 2:
The patent introduces dynamics by enabling the single transceiver to adaptively change its operation mode based on which logical entity is being communicated with. The transceiver dynamically selects appropriate reception opportunities from different entities, adjusting its transmission timing and targeting accordingly. This dynamic behavior provides communication flexibility equivalent to multiple dedicated transceivers while maintaining hardware simplicity.
Data Source
AI summary
This invention relates to a method for transmitting a message to a wireless device, the wireless device comprising a set of at least two distinct logical entities, the wireless device being arranged for receiving a message during discontinuous reception opportunities, the method comprising, prior to transmission of the message, the steps of (a) selecting a transmission mode from a set of transmission modes comprising a first transmission mode and a second transmission mode, where, in the first transmission mode, the reception opportunities for the message are limited to the reception opportunities that are associated with a single selected logical entity of the set of at least two logical entities, and in the second transmission mode, the reception opportunities for the message correspond to combined reception opportunities associated with at least two logical entities; and (b) causing the transmission of the message during one of the reception opportunities corresponding to the selected transmission mode.