Network Node Transmission Power Adaptation for IoT Coverage
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Solution Overview
Problem
Existing wireless communication systems face challenges in balancing the maximum communication distance range and other requirements such as traffic load, capacity, and latency, particularly when serving devices with different needs, like IoT devices and traditional users, within unlicensed frequency bands, where regulatory constraints like medium utilization and duty cycle limit transmission power and bandwidth.
Innovation Solution
A method for dynamically adapting transmission power and bandwidth based on the ratio of IoT devices to traditional devices, allowing higher power for IoT devices when needed for extended coverage and reducing power when serving high-data-rate or low-latency traffic, thereby optimizing system capacity and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If transmission power is increased to extend maximum communication distance range for IoT devices, then coverage is improved, but system capacity and data rate for other devices deteriorate
Solution Approach 1:
The patent applies dynamic adaptation of transmission power based on the ratio of IoT devices to traditional devices in the cell. The network node continuously monitors device composition and adjusts power levels accordingly, transitioning from static to dynamic power control to resolve the contradiction between coverage extension and system capacity maintenance.
Solution Approach 2:
The patent changes the transmission power parameter based on the device ratio condition. When IoT devices requiring extended coverage constitute a significant portion of the cell, the network node increases transmission power; otherwise, it maintains lower power levels. This parameter adaptation resolves the contradiction by making power a variable rather than a fixed value.
2Length of stationary object
If transmission power is increased to serve IoT devices with extended coverage requirements, then coverage enhancement is achieved, but latency increases due to power management overhead
Solution Approach 1:
The network node performs preliminary assessment of the device ratio condition before adjusting transmission power. By evaluating the proportion of IoT devices in advance and proactively adapting power levels, the system avoids reactive power changes that would introduce additional latency, thus resolving the time loss contradiction.
3Adaptability or versatility
If transmission power is dynamically adjusted based on device ratio, then system adaptability improves, but device complexity increases due to monitoring and control mechanisms
Solution Approach 1:
The network node autonomously monitors the device composition and self-adjusts transmission power without requiring external control or complex coordination with user equipment. This self-service approach enhances adaptability while limiting complexity growth by keeping the intelligence centralized in the network node rather than distributed across all devices.
4Productivity
If transmission power is reduced to maintain system capacity, then productivity is improved, but maximum communication distance range deteriorates
Solution Approach 1:
The patent implements conditional parameter changes where transmission power is reduced only when traditional devices dominate the cell composition. When IoT devices requiring extended coverage are present, power is increased accordingly. This dynamic parameter adjustment resolves the contradiction by making power reduction conditional rather than absolute.
Data Source
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AI summary
A method for a network node of a wireless communication network is disclosed. The network node is adapted to communicate with wireless communication devices of a first type associated with a first maximum communication distance range and with wireless communication devices of a second type associated with a second maximum communication distance range, the first maximum communication distance range being greater than second maximum communication distance range. The method comprises acquiring values of a first number and a second number, the numbers representing amounts of wireless communication devices associated with upcoming communication with the network node of the first and second types, respectively. The method further comprises determining, based on a first condition associated with a ratio between the first number and the second number, a transmission power level for the upcoming communication, wherein a first determined transmission power level based on a first ratio is higher than a second determined transmission power level based on a second ratio if the first ratio is higher than the second ratio. The method further comprises causing application of the determined transmission power level to the upcoming communication. Corresponding arrangement, network node and computer program product are also disclosed.