Base Station Resource Allocation for Out-of-Band Radiation Control
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Solution Overview
Problem
In LTE systems, out-of-band radiation interference occurs due to imperfections in user equipment (UE), affecting the performance of adjacent frequency band UEs, and reducing maximum transmit power across all UEs to mitigate this interference impacts uplink coverage and network planning.
Innovation Solution
A method for resource allocation by a base station that adjusts the allocation of resource blocks to UEs based on index numbers, prioritizing scheduling and power control to minimize out-of-band radiation power spectral density, including raising scheduling priority or deleting resource blocks within specific index ranges to ensure compliance with adjacent frequency band limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the maximum transmit power of all UEs is reduced to reduce out-of-band radiation power spectral density, then the out-of-band radiation interference to adjacent frequency bands is reduced, but the uplink coverage scope of the system is affected
Solution Approach 1:
The patent applies local quality by differentiating resource allocation strategies for different UE scenarios. UEs with index numbers in the first range (prone to out-of-band radiation) receive specialized resource block allocation with frequency domain constraints, while other UEs receive standard allocation. This localized approach targets the harmful effect source without imposing system-wide power reductions that would degrade uplink coverage.
Solution Approach 2:
The patent segments the resource block allocation process into distinct handling paths based on UE index number ranges. The first range triggers specific resource allocation restrictions to control out-of-band radiation, while the second range allows normal allocation. This segmentation enables targeted interference mitigation for affected UEs without impacting the overall system uplink coverage performance.
2Object-generated harmful factors
If resource blocks are deleted from UEs with index numbers in the first range to reduce out-of-band radiation, then the power spectral density is reduced, but the number of available resource blocks for data transmission is reduced
Solution Approach 1:
The patent changes the resource allocation parameters (number of resource blocks, frequency domain distribution) for UEs in the first index range to control out-of-band radiation. By adjusting these parameters rather than simply deleting resource blocks, the system maintains adequate data transmission capacity while achieving the required power spectral density reduction through optimized resource utilization.
3Productivity
If the number of resource blocks allocated to UEs is increased to improve data transmission capacity, then the productivity is improved, but the out-of-band radiation power spectral density increases
Solution Approach 1:
The patent implements dynamic resource allocation where the number and distribution of resource blocks are adjusted based on UE-specific characteristics (index number ranges). For UEs in the first range, the allocation is dynamically constrained to prevent excessive out-of-band radiation, while UEs in the second range receive more aggressive allocation for higher data capacity. This dynamic approach balances productivity gains with interference control.
Data Source
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AI summary
Embodiments of the present invention disclose a method for resource allocation and a base station, used for allocating resource blocks by the base station. The method according to the embodiments of the present invention includes: a base station determine a user equipment UE to which a current allocated resource block is allocated; if the index number of any resource block among the allocated resource blocks of the UE falls within a preset first index number range, judging whether the number of the allocated resource blocks of the UE is less than the preset first parameter value; if the number of the allocated resource blocks of the UE is less than the preset first parameter value, raising the scheduling priority of the UE so that the resource block to be allocated next is allocated to the UE, or, deleting, from the allocated resource blocks of the UE, the resource block of which the index number is within the preset first index number range. The method according to embodiments of the present invention can effectively reduce the maximum value of out-of-band radiation power spectral density of the UE, reduce the interference to adjacent frequency bands, and improve the system performance.