UE Power Reduction for Restricted Configurations
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Solution Overview
Problem
Wireless communication devices may experience false grants due to poor channel conditions, leading to excessive emissions in protected bands, which can cause interference and violate regulatory spectrum emissions requirements, as existing solutions like network-side scheduling restrictions are insufficient to ensure compliance in all operational scenarios.
Innovation Solution
A method for mobile user equipment (UE) to reduce transmission power by receiving a network signal value and applying a rule-based decision process to limit output power, taking additional precautions beyond standard transmission grant conditions, including reducing maximum configured output power and storing supplemental power reduction settings in non-volatile memory based on UE design characterization measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network-side scheduling restrictions are applied to prevent excessive emissions, then regulatory compliance is improved, but false grants due to poor channel conditions can still cause interference in protected bands
Solution Approach 1:
The patent applies preliminary anti-action by implementing a check at the UE side that proactively identifies and prevents false grants before they cause harmful emissions. The UE evaluates whether a received grant would result in transmission in restricted configurations (near protected bands) and rejects such grants even before transmission occurs, thereby preventing interference in advance rather than relying solely on network-side restrictions
Solution Approach 2:
The patent implements feedback by having the UE monitor its own grant reception and transmission configuration, then feed this information back to the network. When the UE detects a false grant or potential compliance issue, it sends an indication to the network, allowing the network to adjust scheduling decisions and prevent future occurrences of harmful emissions
2Reliability
If UE transmits in restricted configurations to maintain service continuity, then communication reliability is improved, but spectrum emissions requirements are violated
Solution Approach 1:
The patent applies local quality by implementing location-aware power control where the UE adjusts transmission parameters based on its specific frequency location relative to protected bands. The UE determines whether allocated resource blocks are near protected band edges and applies selective power reduction or transmission restrictions only in those local frequency regions, maintaining full power transmission in safe regions
Solution Approach 2:
The patent implements dynamics by making the UE's transmission configuration adaptive rather than static. The UE dynamically evaluates each grant to determine if it falls in a restricted configuration, and adjusts its transmission behavior accordingly. This dynamic adaptation allows the UE to maintain service continuity in unrestricted configurations while automatically avoiding harmful emissions in restricted configurations
3Productivity
If maximum power is transmitted to maintain data rate, then productivity is improved, but out-of-band emissions increase causing interference
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission parameters (power level, resource block allocation) based on the UE's frequency location and grant configuration. When a grant would result in transmission near protected bands, the UE changes parameters to reduce power or avoid those resource blocks, thereby reducing out-of-band emissions while maintaining maximum power transmission in unrestricted regions
Data Source
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AI summary
In one embodiment, the present disclosure includes a method for reducing out of band emissions. In one embodiment, the method comprises receiving a network signal value from a network, and reducing a transmission signal power on the basis of the network signal value, a center frequency of a transmitting channel, a number of allocated resource blocks, and a location of the allocated resource blocks within the channel.