UE Interference Mitigation Capability Reporting for LTE Control Channels
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Solution Overview
Problem
Current LTE systems do not fully utilize the potential of advanced receivers for interference mitigation in control channels, leading to suboptimal performance due to the inability to distinguish between UEs with advanced and legacy receiver capabilities, resulting in inefficient power adjustment and limited system capacity.
Innovation Solution
A method where communication devices determine and report their interference mitigation capabilities to network nodes, allowing for adaptive radio operation tasks such as power adjustment and CRS assistant information transmission, enabling the network node to optimize control channel performance based on the UE's capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network node uses uniform power adjustment for all UEs, then implementation is simple, but advanced receiver capabilities are not utilized leading to suboptimal performance
Solution Approach 1:
The network node dynamically adjusts radio operation tasks based on received interference mitigation capability information from UEs. The system transitions from static uniform power adjustment to dynamic capability-based adaptation, where the network node modifies transmission parameters according to each UE's reported capabilities, thereby utilizing advanced receiver capabilities to improve system capacity
Solution Approach 2:
The network node changes transmission parameters (power, aggregation levels) based on UE capability parameters. By receiving and processing interference mitigation capability information, the network node adapts radio operation tasks to match UE capabilities, transforming the system from parameter-uniform to parameter-adaptive operation
2Productivity
If the network node implements capability-based adaptive power adjustment, then system capacity improves, but the network node complexity increases
Solution Approach 1:
UEs report their interference mitigation capabilities to the network node in advance, before actual data transmission. This preliminary capability indication allows the network node to pre-configure appropriate radio operation tasks and power settings, avoiding complex real-time analysis and simplifying the processing required during actual communication
Data Source
AI summary
A method of a communication device arranged to operate in a cellular communication system is presented. The method comprises determining interference mitigation capabilities for control symbols, transmitting information about the determined interference mitigation capabilities to a network node of the cellular communication system. Also a method of a network node arranged to operate in a cellular communication system. The method comprises receiving from a communication device operating in the cellular communication system information about determined interference mitigation capabilities of the communication device for control symbols, and adapting a performing of one or more radio operation tasks based on the received information. Communication device, network node, and computer programs for the communication device and network node are also presented.