Uplink Power Control for Roaming Subscriber Differentiation
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Solution Overview
Problem
In wireless cellular networks, ensuring compliance with power leakage regulations across different RF spectrum bands is challenging, especially when serving both subscriber and roaming UEs, as existing methods instruct all UEs to attenuate their uplink transmission power, including those already compliant, leading to unnecessary power reduction.
Innovation Solution
A method and system where a base station allocates uplink air interface resources differently based on UE status, allowing subscriber UEs to use less attenuation than roaming UEs by determining the allocation of resources within the wireless carrier band, thereby minimizing unnecessary power reduction for compliant subscriber UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all UEs are instructed to attenuate uplink transmission power to comply with power leakage regulations, then power leakage compliance is improved, but unnecessary power reduction occurs for subscriber UEs that are already compliant
Solution Approach 1:
The patent applies local quality by differentiating between subscriber UEs and roaming UEs in the power attenuation instruction. The base station identifies subscriber UEs (who are already compliant with power leakage regulations) and exempts them from attenuation instructions, while only instructing roaming UEs to attenuate their power. This localized differentiation ensures that power reduction is applied only where necessary, maintaining compliance while preserving transmission power for compliant devices.
Solution Approach 2:
The patent segments the UE population into two distinct groups: subscriber UEs and roaming UEs. By segmenting the user base and applying different power control policies to each segment, the system avoids unnecessary power attenuation for subscriber UEs while ensuring compliance from roaming UEs. This segmentation is implemented through UE identification mechanisms that allow the base station to recognize and differentiate between the two groups.
2Object-affected harmful factors
If uplink transmission power is reduced to meet regulatory requirements, then power leakage into adjacent bands is minimized, but network coverage and efficiency are degraded
Solution Approach 1:
The patent applies local quality by selectively applying power attenuation only to roaming UEs rather than all UEs uniformly. Since subscriber UEs are already configured to comply with power leakage regulations, they maintain their normal transmission power levels, preserving network coverage and efficiency. The attenuation is locally applied only where necessary (roaming UEs), thus minimizing harmful power leakage without unnecessarily degrading overall network performance.
3Ease of operation
If a blanket attenuation instruction is broadcast to all UEs, then implementation simplicity is improved, but unnecessary power reduction for compliant UEs occurs
Solution Approach 1:
The patent implements local quality by differentiating the attenuation instruction based on UE type. Instead of a blanket instruction to all UEs, the base station selectively sends attenuation instructions only to roaming UEs. This is achieved through UE identification mechanisms that allow the base station to recognize subscriber UEs and exclude them from attenuation instructions, thereby maintaining implementation simplicity while avoiding unnecessary power reduction.
Solution Approach 2:
The patent extracts the compliant subset of UEs (subscriber UEs) from the total UE population and excludes them from the attenuation instruction. By taking out the already-compliant UEs and applying the attenuation policy only to the remaining roaming UEs, the system maintains operational simplicity while eliminating unnecessary power reduction for compliant devices.
Data Source
AI summary
Disclosed is a method and system for allocating uplink air interface resources in a manner that allows particular user equipment devices (UEs) to apply less attenuation than may be specified more generally for UEs served by a base station of a wireless service provider. The base station may operate on a carrier band, serving UEs that are subscribers of the wireless service provider as well as UEs roaming in the base station's coverage area from another service provider. To avoid uplink transmission power leakage across the edges of the carrier band, the base station may broadcast a message to all the UEs notifying them to attenuate their respective transmission levels. The base station may allocate uplink air interface resources to subscribing UEs from a particular portion of the carrier band that allows them to transmit using less attenuation than roaming UEs and still avoid power leakage across the band edges.