Radio Link Data Rate Backoff for QoS-Aware Energy Savings
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Solution Overview
Problem
Existing wireless communication networks face challenges in optimizing network energy savings while ensuring quality of service (QoS) requirements, particularly in future generations like 6G, where increased power consumption due to massive antenna elements and large bandwidths necessitate more efficient energy management techniques.
Innovation Solution
Implementing data rate backoff mechanisms that determine and adjust the data rate limit below the maximum achievable rate, using UE assistance information to balance network energy savings and QoS, by configuring precoding matrix indicators and modulation coding schemes, and dynamically adjusting antenna and power settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the data rate limit is reduced below the maximum achievable rate, then network energy savings are improved, but the data transmission capacity deteriorates
Solution Approach 1:
The patent implements dynamic data rate backoff adjustment where the network node and UE continuously monitor QoS requirements and channel conditions, adjusting the data rate limit adaptively. This allows the system to reduce energy consumption when QoS requirements are met at lower rates, while quickly recovering to maximum rates when QoS demands increase, resolving the contradiction between energy savings and transmission capacity.
Solution Approach 2:
The patent changes the data rate parameter from its maximum value to a reduced backoff value based on QoS requirements. By modifying this key parameter dynamically, the system achieves energy savings when high data rates are not necessary, while maintaining the ability to restore full capacity when needed, thus balancing energy consumption and transmission capacity.
2Loss of energy
If data rate backoff values are applied to maximize network energy savings, then energy efficiency is improved, but the ability to meet varying QoS requirements deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the UE monitors whether its QoS requirements are met under the applied data rate backoff. The UE sends feedback messages to the network node indicating whether the current backoff level is acceptable or needs adjustment. This feedback loop enables the system to adapt to varying QoS requirements while maintaining energy savings, resolving the contradiction between energy efficiency and QoS adaptability.
Solution Approach 2:
The patent applies data rate backoff values in advance based on predicted or current QoS requirements, allowing the network to proactively optimize energy consumption before QoS violations occur. This preliminary adjustment, combined with subsequent feedback, enables the system to maintain both energy efficiency and QoS fulfillment capability.
3Loss of energy
If the data rate limit is reduced, then network energy savings are improved, but the transmission speed deteriorates
Solution Approach 1:
The patent dynamically adjusts the data rate limit based on real-time QoS requirements and channel conditions. When QoS requirements are satisfied at lower data rates, the system reduces the data rate limit to save energy. When QoS demands increase or channel conditions improve, the system quickly restores the data rate to maximum levels, thus balancing energy savings with transmission speed requirements.
4Loss of energy
If data rate backoff mechanisms are implemented, then network energy management is improved, but the system complexity deteriorates
Solution Approach 1:
The patent implements a self-service mechanism where the UE autonomously determines whether its QoS requirements are met under the applied data rate backoff and provides feedback to the network node. This distributes the complexity of QoS monitoring from the network side to the UE side, simplifying the overall control mechanism while achieving effective energy management.
Data Source
AI summary
Disclosed is a method comprising determining, by an apparatus, one or more data rate backoff values for reducing a data rate limit of a radio link between the apparatus and a user equipment to be less than a maximum achievable data rate of the radio link, while fulfilling one or more quality of service requirements of the user equipment; and transmitting, by the apparatus, to the user equipment, a message indicating the one or more data rate backoff values.