NB-IoT Uplink Power Control for Interference-Aware Transmission
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Solution Overview
Problem
In Narrowband Internet of Things (NB-IoT) systems, the fixed transmit power determination method for terminal devices leads to increased interference in networks with heavy load or high device density, as devices often transmit at maximum power, compromising system capacity and interference levels.
Innovation Solution
A network device indicates a power control manner to terminal devices based on network load and signal transmission status, allowing flexible power control through parameters such as path loss, transmission bandwidth, and maximum power, enabling adaptive power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices send signals directly by using maximum transmit powers, then signal transmission reliability is improved, but interference between signals of terminal devices is aggravated
Solution Approach 1:
The patent implements dynamic power control where terminal devices adjust their transmit power based on real-time network conditions. The base station sends power control commands to terminal devices, enabling the transmit power to vary dynamically rather than remaining fixed at maximum level, thus reducing interference while maintaining reliability when needed
Solution Approach 2:
The patent changes the power control parameter from a fixed maximum transmit power to a dynamically adjustable parameter. The base station monitors network conditions and sends indications to terminal devices to adjust power control parameters such as path loss compensation factors, enabling flexible power adjustment to balance reliability and interference reduction
2Device complexity
If terminal devices use fixed signal transmit power determining manner, then device complexity is reduced, but adaptability to different network conditions deteriorates
Solution Approach 1:
The patent enables terminal devices to autonomously adjust their transmit power based on network conditions without requiring complex manual configuration. The base station provides power control indications and terminal devices automatically apply the appropriate power control parameters, achieving adaptive power control through a semi-autonomous mechanism that balances complexity and adaptability
Solution Approach 2:
The patent implements a feedback mechanism where the base station monitors uplink signal quality and network conditions, then sends power control indications back to terminal devices. This closed-loop feedback enables the system to adapt to changing network conditions while keeping terminal device complexity manageable, as the adjustment logic is distributed between base station monitoring and terminal device execution
Data Source
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AI summary
An indication information sending method, an indication information receiving method, a device, and a system are provided, and relate to the field of wireless communications technologies. The method includes: generating, by a base station, first indication information, and sending the first indication information to a terminal device; and receiving, by the terminal device, the first indication information, and determining a power control manner of a first channel based on the first indication information, where the first indication information is used to indicate the power control manner of the first channel, the power control manner of the first channel is one power control manner in a power control manner set, and the power control manner set includes at least one power control manner Because a network device can indicate the power control manner of the first channel to the terminal device by using the first indication information, compared with the prior art, the terminal device determines a transmit power of a signal in a more flexible manner, so that the terminal device can better adapt to a current network.