Dynamic Resource Allocation in Heterogeneous Radio Networks
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Solution Overview
Problem
In heterogeneous radio communication networks, existing inter-cell interference control techniques, such as eICIC, face challenges in dynamically adjusting resource allocation between high-power and low-power radio base stations based on actual usage status, leading to inefficient resource utilization and interference issues.
Innovation Solution
A radio communication system where high-power radio base stations collaborate with low-power radio base stations to dynamically adjust resource allocation by determining a ratio of usable resources based on the proportion of mobile terminals connected to each type of base station, allowing for flexible control of resource availability to minimize interference and ensure fair resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cell range expansion is applied to low-power radio base stations, then communication load of macro base stations is reduced, but mobile terminals at the edge of low-power base station cells are subject to high levels of interference from neighboring macro base stations
Solution Approach 1:
The patent segments radio resources into protected resources and non-protected resources, allocating different resource sets to different base station types. Low-power base stations are assigned protected resources that are excluded from macro base station usage, thereby isolating edge terminals from macro base station interference while maintaining load distribution benefits.
Solution Approach 2:
The patent applies different resource allocation strategies to different spatial locations. Mobile terminals at the edge of low-power base station cells are assigned protected resources with higher quality (free from macro interference), while terminals at cell centers can use both protected and non-protected resources, optimizing resource utilization based on local interference conditions.
2Object-affected harmful factors
If resources usable by macro base station are limited through eICIC, then interference to mobile terminals connected with low-power radio base stations is minimized, but resource utilization efficiency of macro base station deteriorates
Solution Approach 1:
The patent dynamically adjusts the ratio of protected resources based on actual system conditions, including the proportion of mobile terminals connected to low-power base stations and interference measurements. This allows the system to optimize the balance between interference mitigation and resource utilization efficiency rather than using fixed resource partitioning.
Solution Approach 2:
The patent implements feedback mechanisms where the macro base station receives information about the number of mobile terminals connected to low-power base stations and interference levels, then adjusts protected resource allocation accordingly. This feedback loop enables adaptive optimization of resource utilization while maintaining interference protection.
3Ease of operation
If fixed ratio of protected resources is allocated to low-power radio base stations, then interference control is simplified, but adaptability to changing usage status of base stations deteriorates
Solution Approach 1:
The patent transitions from fixed to dynamic resource ratio allocation. The ratio of protected resources is adjusted based on real-time system state, including the proportion of mobile terminals served by low-power base stations and measured interference conditions, enabling adaptation to changing usage patterns while maintaining manageable complexity through automated adjustment.
Solution Approach 2:
The macro base station autonomously determines and adjusts the protected resource ratio based on information about mobile terminal connections and interference conditions, without requiring complex centralized coordination. This self-service approach maintains ease of operation while achieving adaptability to changing system usage status.
Data Source
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AI summary
A high-power radio base station includes a resource setter configured to determine a ratio of the number of second resources at which the radio communicator should stop radio transmission to the sum of the number of the second resources and the number of first resources at which the radio communicator should execute radio transmission. The resource setter determines the ratio on the basis of a first number and a second number, the first number being the number of mobile terminals that are assumed to be connected with the radio base station, rather than the low-power radio base station, when cell range expansion (CRE) is not applied, but are connected with the low-power radio base station by virtue of application of cell range expansion, the second number being the number of mobile terminals connected with the radio base station when cell range expansion is applied. The resource setter determines the ratio in such a manner that the greater the proportion of the second number to the first number, the smaller the ratio.