Adaptive Duplex Mode Switching for Battery-Constrained Uplink Reliability
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Solution Overview
Problem
Peak current limited devices, such as those with limited battery power or antenna constraints, face challenges in maintaining continuous uplink transmission in LTE systems, leading to decreased user experience due to negative reactions from base station schedulers when they need to blank sub-frames, as current standards do not effectively accommodate varying duty cycles and modes of operation.
Innovation Solution
User equipment (UE) devices are equipped with processors and radios configured to adapt between full duplex and half duplex modes of operation based on detected conditions, such as real-time data packet sessions or radio conditions, allowing them to notify the network of their capabilities and switch modes to conserve power and maintain communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a peak current limited device transmits continuously in the uplink, then the base station scheduler can maintain optimal scheduling, but the device cannot sustain transmission due to battery or power amplifier limitations
Solution Approach 1:
The device dynamically switches between full duplex and half duplex modes of operation based on detected conditions such as real-time data packet sessions or radio conditions. This dynamic adaptation allows the device to adjust its transmission characteristics to match its power capabilities while maintaining communication reliability.
Solution Approach 2:
The device changes its operational parameters by switching between different duplex modes, which fundamentally alters how it shares the communication channel with the base station. This parameter change enables the device to operate within its power constraints while maintaining uplink timeline adherence.
2Use of energy by moving object
If a device operates in half duplex mode to conserve power, then power consumption is reduced, but the base station scheduler may react negatively and impact throughput
Solution Approach 1:
The device provides feedback to the network about its capabilities and operational state. By notifying the base station of its duplex mode and duty cycle characteristics, the device enables the scheduler to make informed decisions that maintain throughput while accommodating the device's power constraints.
Solution Approach 2:
The device sends capability information to the network in advance, allowing the base station scheduler to proactively adjust its scheduling decisions. This preliminary action prevents negative scheduler reactions by ensuring the network is aware of the device's operational constraints before scheduling conflicts arise.
3Productivity
If a device switches between full duplex and half duplex modes adaptively, then power usage is optimized and communication efficiency is maintained, but the device complexity increases
Solution Approach 1:
The device autonomously detects conditions such as real-time data packet sessions or radio conditions and automatically switches between duplex modes without requiring complex external control. This self-service approach optimizes power usage and maintains communication efficiency while managing device complexity through automated decision-making.
Data Source
AI summary
A user equipment (UE) and network entity implement improved communication methods which enable a UE to operate using differing modes of operation without detaching from a network. The UE may send first information indicating its capabilities to the network entity and may receive a first indication based on the first information. The first indication may indicate that the UE operate according to a first mode of operation. The UE may receive a second indication based on an occurrence of a first condition detectable at the network entity. The second indication may indicate that the UE operate according to a second mode of operation different from the first mode of operation. The first condition may be an initialization of a real time data packet session for the UE or may be a first message sent by the UE in response to one or more radio conditions exceeding a threshold.