Initial Ranging Transmission Power Control
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Solution Overview
Problem
Existing communication systems face inefficiencies in ranging processes, where devices often transmit multiple signals blindly without knowing their location relative to each other, leading to ineffective and inefficient ranging operations.
Innovation Solution
The system introduces a method where a communication device receives a ranging instruction signal with initial power and power steps, allowing it to transmit a first ranging signal based on these parameters, and if unsuccessful, adjusts the power for subsequent signals to optimize transmission without interfering with other devices, using orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a communication device transmits multiple ranging signals blindly without knowing its location, then the ranging process can eventually succeed, but the number of transmission attempts increases and time is wasted
Solution Approach 1:
The system performs preliminary actions by having the network device calculate and provide initial ranging transmission power before the communication device actually transmits ranging signals. This pre-computation of optimal power levels based on known location information allows the communication device to transmit the first ranging signal with the correct power level from the start, eliminating the need for multiple blind transmission attempts and reducing ranging procedure duration.
2Reliability
If a communication device transmits ranging signals at higher power to ensure reception, then the signal can be received successfully, but interference with other devices increases
Solution Approach 1:
The system applies local quality by providing different initial ranging transmission power levels to different communication devices based on their specific location characteristics relative to the network device. Each communication device receives a customized power level tailored to its local conditions, ensuring optimal signal reception without causing excessive interference to other devices in different locations.
Solution Approach 2:
The system changes the transmission power parameter dynamically based on location information. The network device calculates the optimal initial ranging transmission power by considering the distance and environmental factors between the communication device and network device, then provides this calculated power level to the communication device for its ranging signal transmissions.
3Object-generated harmful factors
If a communication device transmits ranging signals at lower power to minimize interference, then other devices are protected, but the ranging signal may not be received successfully
Solution Approach 1:
The network device performs preliminary calculation of the optimal transmission power level before the communication device transmits. This advance computation ensures that the first ranging signal is transmitted at precisely the right power level - high enough to be received successfully but low enough to minimize interference - eliminating the need for the communication device to guess or use conservative power levels.
Data Source
AI summary
A communication device (device) includes a communication interface and a processor, among other possible circuitries, components, elements, etc. to support communications with other device(s) and to generate and process signals for such communications. The device receives a ranging instruction signal, which includes an initial power and at least one power step, from another device. The device processes the ranging instruction generates a first ranging signal based on the initial power. The device then transmits the first ranging signal to the another device. When a ranging response to the first ranging signal is received from the another device, the device determines that the device is successfully ranged to the another device. Alternatively, when no ranging response is received, the device generates a second ranging signal based on the initial power and the at least one power step and transmit the second ranging signal to the another device.