Mobile Device Interference Cancellation Capability Management
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Solution Overview
Problem
Wireless communication networks face interference issues due to the increasing demand for mobile broadband access, leading to degraded performance in both downlink and uplink transmissions, especially in heterogeneous networks with varying eNB power levels and unplanned deployments of pico and femto cells.
Innovation Solution
A method where a mobile device selectively deactivates certain interference cancellation (IC) capabilities based on operating conditions and reports its active IC capabilities to the base station, allowing the base station to modify communication conditions, such as scheduling and resource allocation, to mitigate interference and optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile device uses all interference cancellation capabilities continuously, then interference mitigation performance is improved, but power consumption increases
Solution Approach 1:
The mobile device dynamically adjusts its interference cancellation capabilities based on current operating conditions. The device monitors signal quality metrics (such as RSRP, RSRQ, SINR) and selectively activates or deactivates specific IC capabilities (full IC, partial IC, or no IC) to match the current interference environment, thereby optimizing power consumption while maintaining adequate interference mitigation performance.
Solution Approach 2:
The invention changes the operational parameters of interference cancellation by introducing multiple capability levels (full IC, partial IC, no IC) and transitioning between them based on measured signal conditions. The device modifies parameters such as processing complexity, capability activation status, and reporting behavior to balance performance and power consumption.
2Reliability
If the mobile device reports detailed IC capability information frequently, then network optimization is improved, but signaling overhead increases
Solution Approach 1:
The mobile device performs partial reporting by selectively providing IC capability information only when necessary. Instead of continuously reporting all capability details, the device reports based on triggered events such as changes in operating conditions, transitions between capability levels, or specific network requests, thereby reducing signaling overhead while maintaining network optimization capability.
3Productivity
If the base station schedules transmissions without considering UE IC capabilities, then scheduling simplicity is maintained, but communication performance deteriorates
Solution Approach 1:
The base station segments the scheduling process by first obtaining UE IC capability information through capability reporting, then using this segmented information to make informed scheduling decisions. The capability information is divided into discrete levels (full IC, partial IC, no IC) that simplify the scheduling logic while improving communication performance through capability-matched resource allocation.
Data Source
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AI summary
Incremental interference cancelation (IC) capability management and signaling is disclosed. A mobile device selects certain groups of its individual IC capabilities to deactivate in response to various operating conditions it is experiencing. The mobile device reports its currently active IC capability to a serving base station, which uses information to determine whether to modify any existing communication conditions with respect to the reporting mobile device. The base station detects and analyzes the current communication conditions with respect to the reporting mobile device in light of the mobile device's currently active IC capabilities. The base station may modify such conditions through actions such as signaling the mobile device to activate or deactivate certain other groups of IC capabilities. The base station can make other modifications such as changing the communication schedule for the mobile device, modifying the control loop for channel quality indicator (CQI) reporting, and the like.