Category M Device Power Saving Mode Negotiation
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Solution Overview
Problem
In wireless communication networks, especially those with IoT devices, the lack of awareness of power saving modes in network devices leads to inefficient resource allocation, increased power consumption, and network interference, as devices often disconnect or re-associate unnecessarily when transitioning between power saving and active states.
Innovation Solution
A Category M apparatus and method that communicate power saving mode capabilities to the core network, allowing for the scheduling of sleep periods and wake-up times, enabling the network to coordinate communications and optimize timers based on device capabilities, thereby reducing unnecessary disconnections and improving power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If devices operate in power saving modes by suspending communications, then power consumption is reduced, but network connectivity is lost and devices cannot receive communications
Solution Approach 1:
The device performs preliminary actions by notifying the network of its power saving mode entry before actually suspending communications. The network is pre-informed of the upcoming sleep period, allowing it to prepare for the disconnection and schedule communications appropriately, thus maintaining reliability while enabling power saving.
Solution Approach 2:
The network provides feedback to the device about scheduled communications and resource allocations even when the device is in power saving mode. This feedback mechanism allows the network to coordinate with the device's wake-up schedule, ensuring that important communications are delivered when the device is active, thereby maintaining connectivity reliability.
2Use of energy by moving object
If devices disconnect and re-associate when transitioning between power saving and active states, then power saving is achieved, but network interference increases and communication efficiency decreases
Solution Approach 1:
The device notifies the network in advance of its power saving mode entry and expected wake-up time. This preliminary notification allows the network to maintain the device's connection context and prepare for resumption without requiring full re-association, thereby reducing network interference caused by repeated connection establishment procedures.
Solution Approach 2:
The system dynamically adjusts communication scheduling based on the device's power saving status. The network modifies resource allocations and communication timing to match the device's active and sleep cycles, enabling seamless transitions without full disconnection and re-association, thus reducing network interference while maintaining power saving benefits.
3Device complexity
If the network is unaware of device power saving capabilities, then device simplicity is maintained, but resource allocation becomes inefficient and power saving operations are disrupted
Solution Approach 1:
The device includes power saving capability information in its initial registration message to the network. This preliminary provision of capability information allows the network to understand the device's power saving requirements from the outset, enabling efficient resource allocation and communication scheduling without requiring complex ongoing negotiations or additional signaling overhead.
Data Source
AI summary
One aspect of the present application provides a Category M apparatus that communicates over a communication network. The apparatus comprises a processor and an interface. The processor is configured to generate a message requesting registration of the apparatus with a core network, the message generated to include at least one header indicating a power saving mode capability of the apparatus. The processor is further configured to schedule sleep periods and wakeup times for the apparatus. The interface is configured to transmit the message to the core network. The interface is further configured to receive a response, from the core network, including one or more parameters and one or more timers established by the core network based at least in part on the power saving mode capability of the apparatus.