Resource Occupancy Indicators for Heterogeneous Network Interference
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Solution Overview
Problem
Existing communication systems face challenges in managing resource occupancy schemes in legacy and enhanced control resource areas, leading to unnecessary power consumption and interference due to limited capacity and interference issues in heterogeneous networks.
Innovation Solution
A method where a base station determines and communicates the resource occupancy scheme to User Equipment (UE) through specific periodicity indicators, allowing the UE to differentiate between legacy and enhanced control resource areas, thereby optimizing control information transmission and avoiding interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If ABS subframes are configured for interference avoidance in heterogeneous networks, then interference between macro base station and low-power base station is reduced, but control information transmission capacity is limited and system complexity increases
Solution Approach 1:
The patent segments control resource areas into legacy control resource areas and enhanced control resource areas. The legacy control resource area follows traditional ABS subframe patterns for interference avoidance, while the enhanced control resource area provides additional control information transmission capacity. This segmentation resolves the contradiction by maintaining interference avoidance benefits while adding capacity through the enhanced area.
Solution Approach 2:
The patent introduces a new dimension for control resource allocation by defining enhanced control resource areas that operate alongside legacy control resource areas. This dimensional expansion allows the system to maintain ABS-based interference coordination in the legacy domain while utilizing the enhanced domain for additional control information transmission, thereby increasing overall capacity without compromising interference management.
2Object-affected harmful factors
If ABS subframes are used for interference coordination, then downlink interference is reduced, but unnecessary power consumption occurs due to limited awareness of resource occupancy scheme
Solution Approach 1:
The patent implements a feedback mechanism where the base station sends resource occupancy scheme indicators to the UE, informing it about the occupancy status of legacy and enhanced control resource areas in different subframes. This feedback enables the UE to adjust its reception behavior accordingly, avoiding unnecessary power consumption while maintaining interference coordination benefits through ABS subframes.
Solution Approach 2:
The UE autonomously determines its reception behavior based on the received resource occupancy scheme indicators. Instead of continuously monitoring all subframes, the UE can enter sleep mode or reduce monitoring activity in subframes where control information is not transmitted, thereby reducing power consumption while still receiving necessary control information in appropriate subframes.
3Productivity
If control information is transmitted in both legacy and enhanced control resource areas, then control information transmission capacity is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by allowing control information to be transmitted selectively in different areas based on specific needs. The legacy control resource area maintains traditional transmission patterns for compatibility, while the enhanced control resource area provides additional transmission capacity where needed. This localized approach improves overall capacity without requiring complex processing throughout the entire system.
Solution Approach 2:
The enhanced control resource area serves multiple functions: it provides additional control information transmission capacity, maintains compatibility with legacy systems through the legacy control resource area, and enables flexible resource allocation. This multi-functionality improves transmission capacity while managing device complexity by reusing existing legacy infrastructure.
4Measurement precision
If resource occupancy scheme indicators are transmitted with specific periodicity, then UE can accurately detect control information, but signaling overhead increases
Solution Approach 1:
The patent employs periodic transmission of resource occupancy scheme indicators at configured intervals rather than in every subframe. This periodic action maintains detection accuracy by providing updates at appropriate frequencies while significantly reducing signaling overhead compared to continuous transmission. The periodicity can be adjusted based on system conditions and UE requirements.
Solution Approach 2:
The system dynamically adjusts the periodicity parameter of resource occupancy scheme indicator transmission based on current network conditions, UE mobility state, and service requirements. This parameter change allows the system to optimize between detection accuracy and signaling overhead, using higher periodicity when accuracy is critical and lower periodicity when overhead reduction is prioritized.
Data Source
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AI summary
There is disclosed a method of indicating a resource occupancy scheme and processing a resource occupancy scheme indicator so as to enable a UE to be aware a resource occupancy scheme of the network side and avoid an unnecessary power waste and unnecessary interference, and in the method, a base station generates a corresponding resource indicator for a resource occupancy scheme of a legacy control resource area and an enhanced control resource area in each downlink subframe to be transmitted in a specific periodicity and sends the resource indicator to a UE in a resource indication message, and the UE determines from the obtained resource indicator the resource occupancy scheme of the legacy control resource area and the enhanced control resource area in each downlink subframe to be transmitted in the specific periodicity and performs a corresponding resource handling mode, so that the UE can blindly detect in PDCCH common and user spaces or receive control information carried on PHICH resource at an accurate position to thereby avoid an unnecessary power waste of and unnecessary interference to the UE due to blind detection or reception and improve effectively the performance of a system.