Pre-emptive Buffer Status Report for Network Power Saving
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently managing power consumption in base stations, particularly when unaware of traffic conditions from connected devices, leading to inefficient sleep mode activation and potential dropped communications.
Innovation Solution
A method where a wireless device generates an extended, pre-emptive Buffer Status Report (BSR) indicating expected traffic arrival times for connected devices, allowing the parent device to activate an appropriate sleep mode based on anticipated traffic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the base station activates sleep mode to save power, then power consumption is reduced, but communication reliability deteriorates due to potential dropped transmissions
Solution Approach 1:
The patent applies preliminary action by having the wireless device send an extended BSR report in advance, indicating expected traffic arrival times and volumes. This allows the base station to proactively plan its sleep mode activation before actual traffic arrives, ensuring it wakes up just in time to handle transmissions, thus maintaining reliability while maximizing power savings.
Solution Approach 2:
The patent implements feedback through the extended BSR mechanism, where the wireless device provides the base station with feedback about upcoming traffic patterns. This feedback loop enables the base station to adjust its sleep schedule dynamically based on actual traffic needs, resolving the contradiction between power saving and communication reliability.
2Reliability
If the base station remains in active mode to ensure communication reliability, then communication reliability is maintained, but power consumption increases
Solution Approach 1:
The base station uses the preliminary traffic information from the extended BSR to activate sleep mode in advance when no traffic is expected. By knowing the exact arrival times of future transmissions, the base station can confidently enter sleep mode during idle periods, reducing power consumption while guaranteeing it will be active when needed for reliable communication.
Solution Approach 2:
The patent enables dynamic operation by allowing the base station to switch between active and sleep modes based on predicted traffic conditions. This dynamic behavior, guided by the extended BSR forecasts, optimizes the balance between power consumption and communication reliability by adapting the base station's operational state to actual network demands.
3Use of energy by moving object
If the base station frequently transitions between sleep and active modes, then power saving is optimized, but transition time and system complexity increase
Solution Approach 1:
The extended BSR provides the base station with advance notice of traffic arrival times, allowing it to plan sleep mode activations and deactivations optimally. By knowing when traffic will arrive, the base station can minimize unnecessary transitions and schedule wake-up times precisely, reducing overall transition time while maintaining effective power saving.
Solution Approach 2:
The system achieves self-service optimization where the extended BSR mechanism automatically provides the base station with the information needed to make intelligent sleep mode decisions. This self-service approach enables the base station to optimize its own power management and transition scheduling based on actual traffic patterns, minimizing transition overhead while maximizing power savings.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first device (e.g., an integrated access and backhaul (IAB) node) may obtain one or more messages from one or more second devices (e.g., user equipments (UEs), child nodes) communicating with the first device, the messages triggering the first device to generate a buffer status report (BSR). The first device may output the BSR in a BSR message to a parent device, where the BSR may indicate one or more arrival times associated with expected traffic for the second devices based on the messages. Upon obtaining the BSR message, the parent device may activate a sleep mode for one or more components associated with the parent device based on the arrival times indicated in the BSR. For example, if the arrival times are relatively long, the parent device may activate a sleep mode for increased power savings.