Wireless Resource Allocation for Interference Suppression
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Solution Overview
Problem
Existing wireless communication systems, such as LTE, face significant throughput degradation due to interference from neighboring cells, particularly for edge wireless terminals, where restricting bandwidth does not effectively improve channel quality and can lead to reduced throughput.
Innovation Solution
A wireless resource setting method that acquires a neighboring priority band and calculates transmission rates using both candidate bands with and without the neighboring priority band, allowing for the allocation of resources that maximize throughput while minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If bandwidth is restricted for edge wireless terminals to avoid neighboring cell interference, then interference from neighboring cells is reduced, but throughput of the wireless terminal is degraded
Solution Approach 1:
The patent implements dynamic wireless resource allocation where the base station adaptively selects candidate bands and determines transmission rates based on real-time communication path quality feedback from wireless terminals. This dynamic adjustment allows the system to optimize between interference avoidance and throughput maximization according to current channel conditions, rather than using static bandwidth restrictions.
Solution Approach 2:
The patent changes the parameter of transmission rate based on communication path quality. By calculating transmission rates according to actual channel conditions and selecting from multiple candidate bands, the system can achieve higher throughput when channel quality is good while still protecting against interference when quality degrades, resolving the contradiction between interference avoidance and throughput maintenance.
2Object-affected harmful factors
If priority bands are set to suppress neighboring cell interference, then interference coordination between cells is improved, but the allocatable band for wireless terminals is reduced
Solution Approach 1:
The patent segments the wireless spectrum into multiple candidate bands and selectively allocates them based on communication path quality. Instead of designating fixed priority bands that reduce overall allocatable spectrum, the system divides bands into candidate sets and dynamically selects which segments to use for each terminal, maximizing both interference coordination and spectrum utilization.
Solution Approach 2:
The patent makes band allocation dynamic by maintaining multiple candidate bands and selecting from them based on real-time communication path quality. This allows the system to flexibly allocate more bands when interference is low and quality is good, while still having the option to restrict to fewer bands when interference increases, thus improving both interference coordination and maintaining larger allocatable bandwidth when possible.
3Reliability
If transmission power is increased to improve communication path quality, then throughput is improved, but interference to neighboring cells increases
Solution Approach 1:
The patent changes the transmission rate parameter based on communication path quality rather than simply increasing transmission power. By calculating appropriate transmission rates according to channel conditions and selecting from multiple candidate bands, the system achieves reliable communication through adaptive rate adjustment while avoiding the interference problems associated with power increases.
Solution Approach 2:
The patent converts the potential harm of operating in shared frequency bands by using intelligent selection of candidate bands based on communication path quality. Instead of avoiding bands to prevent interference, the system strategically selects from multiple candidate bands, using quality feedback to determine when and where higher rate transmission is feasible, thus turning the shared medium into a beneficial resource.
Data Source
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AI summary
A wireless base station (100) calculates a first transmission rate when performing transmission to a wireless terminal with communication path quality by a first transmission power in a first candidate band selected as a candidate from first wireless bands including a neighboring priority band, calculates a second transmission rate when performing transmission to the wireless terminal (200) with the communication path quality by a second transmission power in a second candidate band selected as a candidate from second wireless bands that do not include the neighboring priority band, and sets, out of a first wireless resource including the first transmission power and the first candidate band and a second wireless resource including the second transmission power and the second candidate band, a wireless resource for a higher transmission rate obtained by the calculation as a wireless resource allocatable to the wireless terminal (200). It is therefore possible to maximize the throughput of the wireless terminal existing in the local station communication area while implementing suppression of interference to the neighboring cell.