Uplink Resource Allocation by CINR Grouping
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Solution Overview
Problem
In mobile communication systems, terminals located in boundary regions experience reduced performance due to interference from neighboring base stations, and existing methods struggle to effectively manage interference when communication between base stations is unavailable, leading to difficulties in resource allocation and power control.
Innovation Solution
A method for a serving base station to allocate radio resources and determine transmission power for uplink frames by grouping terminals based on measured Carrier-to-Interference-and-Noise-Ratios (CINRs) and classifying them into maximum and limited power groups, allowing for efficient resource allocation and power control without requiring communication with neighboring base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the serving base station increases transmission power to compensate for interference from neighboring base stations, then terminal performance in boundary regions is improved, but interference to neighboring base stations increases
Solution Approach 1:
The patent applies local quality by differentiating resource allocation and power control strategies for terminals in different geographic regions (central region vs. boundary region). Terminals in the central region are allocated different subchannels and power levels compared to terminals in the boundary region, optimizing performance while minimizing interference to neighboring cells.
Solution Approach 2:
The patent changes key parameters including transmission power levels, subchannel assignments, and resource block allocations based on terminal location and interference conditions. By dynamically adjusting these parameters, the system improves boundary region performance while controlling interference through coordinated parameter modification across multiple base stations.
2Productivity
If the serving base station and neighboring base station exchange information through communication, then interference control efficiency is improved, but system complexity increases due to required communication infrastructure
Solution Approach 1:
The patent enables base stations to perform self-service by autonomously estimating interference from neighboring base stations using measurements of received signals. This eliminates the need for complex inter-base-station communication infrastructure while maintaining effective interference control through self-measurement and self-adjustment of transmission parameters.
3Device complexity
If the serving base station estimates interference by measuring received signal from neighboring base station, then communication infrastructure requirement is reduced, but interference estimation accuracy deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where terminals measure and report channel quality indicators (CQI) and reference signal received power (RSRP) to their serving base station. The base station uses this feedback information along with its own measurements to accurately estimate interference conditions and adjust resource allocation and power control parameters accordingly, improving estimation accuracy without requiring direct base station communication.
Data Source
AI summary
A method for controlling transmission power in a mobile communication system is provided. According to the method, a serving base station arranges a plurality of terminals in ascending order according to Carrier-to-Interference-and-Noise-Ratios (CINRs) based on the CINR measured by the plurality of terminals, classifies the plurality of terminals in one of a first group and a second group according to the order, allocates a subchannel of a data region corresponding to the first group from among a plurality of data regions included in the uplink frame to a terminal classified as the first group, and allocates a subchannel of a data region corresponding to the second group from among the data regions to a terminal classified as the second group.