Wireless Power Adjustment via Pathloss Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional random access procedures in wireless networks, such as PRACH, are time-consuming and lead to increased communication collisions and noise due to the step-wise power ramp-up mechanism used by user equipment to establish a wireless communication link with a base station.
Innovation Solution
The implementation of a method where a first mobile communication device receives communication information from a second device in the network, including pathloss and resource availability, to determine an optimal power level for establishing a wireless communication link with the base station, thereby reducing the need for repeated power increases and collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment uses step-wise power ramp-up mechanism to establish wireless communication link, then the user equipment can eventually establish connection with base station, but the time required to establish link increases and communication collisions increase
Solution Approach 1:
The patent applies preliminary action by having user equipment obtain pathloss information from system information blocks before attempting random access. This allows the UE to pre-calculate an initial power level that is more likely to succeed on the first attempt, rather than starting from a low power level and ramping up step-by-step. The pre-acquired pathloss data enables the UE to jump-start the connection process with a better initial power setting.
Solution Approach 2:
The patent changes the power level parameter calculation method by using pathloss information from system information blocks to determine initial transmit power. Instead of following the conventional fixed step-wise ramp-up sequence, the UE calculates initial power based on Ppathloss values obtained from SIBs, allowing dynamic adjustment of the power parameter to match actual channel conditions and reduce establishment time.
2Reliability
If user equipment uses step-wise power ramp-up mechanism, then connection can be established, but the number of communication collisions increases
Solution Approach 1:
The patent applies preliminary action by acquiring pathloss information from system information blocks before random access attempts. This allows user equipment to pre-calculate an optimal initial power level based on current channel conditions, reducing the probability of transmission failures and collisions. By having this information available in advance, the UE can adjust its transmit power more accurately from the first attempt.
Solution Approach 2:
The patent implements feedback by continuously monitoring pathloss information from system information blocks and using this feedback to adjust the initial power level for random access transmissions. The UE uses the Ppathloss values as feedback about channel conditions to optimize its transmit power, creating a closed-loop system that adapts to changing wireless conditions and reduces collisions.
3Reliability
If user equipment uses step-wise power ramp-up mechanism, then connection can be established, but the noise floor increases
Solution Approach 1:
The patent applies preliminary action by obtaining pathloss information from system information blocks before initiating random access. This allows the user equipment to calculate an appropriate initial power level that is sufficient for successful transmission without being excessively high. By pre-acquiring channel condition data, the UE can set power levels that are optimized for the actual conditions rather than using conservative high power levels that increase noise floor.
Solution Approach 2:
The patent changes the power level parameter by using pathloss-based calculations instead of fixed step-wise increments. This allows the transmit power parameter to be dynamically adjusted based on actual channel conditions, enabling the system to use lower power levels when conditions permit, thereby reducing the noise floor while maintaining connection establishment success.
Data Source
AI summary
A wireless network environment includes a wireless base station and multiple mobile communication devices. A first mobile communication device transmits a first wireless communication from a first mobile communication device to establish a wireless communication link with a wireless base station. The first mobile communication device receives communication information from a second mobile communication device in the wireless network environment. The first mobile communication device uses the communication information from the second mobile communication device to establish the wireless communication link between the first mobile communication device and the wireless base station. For example, the communication information indicates a magnitude of a wireless pathloss between the second mobile communication device and the wireless base station. The first mobile communication device uses the wireless pathloss as specified by the communication information as a basis to set a power level of communicating a second wireless communication to the wireless base station.