Autonomous Denial for IDC Interference in Dual Connectivity
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Solution Overview
Problem
In wireless communication systems, especially in LTE, the proximity of multiple radio transceivers within a user equipment (UE) leads to in-device coexistence (IDC) interference, which current filter technologies cannot adequately address, affecting signal reception and requiring a method for autonomous denial to minimize interference.
Innovation Solution
A method and apparatus for performing autonomous denial in dual connectivity by applying a received autonomous denial rate to either a master cell group (MCG) or a secondary cell group (SCG) in a UE connected to both a master eNB and a secondary eNB, allowing the UE to manage interference by controlling radio resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio transceivers are equipped in a UE to access various networks and services, then service availability and functionality are improved, but in-device coexistence interference increases due to extreme proximity of transceivers operating on adjacent frequencies
Solution Approach 1:
The patent extracts the harmful interference problem by identifying specific subframes where IDC occurs and autonomously denying transmissions in those subframes. The UE separates the problematic frequency resources from normal operation by applying autonomous denial rates to specific cell groups (MCG or SCG), effectively removing the interference source from the communication process.
Solution Approach 2:
The patent implements periodic action through autonomous denial patterns where the UE periodically denies transmissions in specific subframes based on configured denial rates. The network configures autonomous denial parameters including subframe patterns and rates, creating a periodic structure that systematically addresses IDC interference at regular intervals rather than continuously blocking all transmissions.
2Reliability
If autonomous denial is applied to deny certain transmissions to avoid IDC interference, then signal quality is improved, but transmission efficiency and data throughput decrease
Solution Approach 1:
The patent applies partial action by implementing autonomous denial selectively in specific subframes rather than continuously blocking all transmissions. The network configures autonomous denial rates that specify what portion of transmissions should be denied, allowing the UE to maintain normal transmission efficiency in non-denied subframes while achieving sufficient interference reduction in the denied subframes to improve overall signal quality.
Solution Approach 2:
The patent changes transmission parameters by dynamically adjusting autonomous denial rates and subframe patterns based on interference conditions. The network can modify the autonomous denial configuration parameters to optimize the balance between signal quality improvement and throughput maintenance, adapting the denial intensity and timing according to actual IDC severity and traffic requirements.
Data Source
AI summary
A method and apparatus for performing autonomous denial for dual connectivity in a wireless communication system is provided. A user equipment (UE) receives an autonomous denial rate from a network, and applies the received autonomous denial rate to at least one of a master cell group (MCG) or a secondary cell group (SCG). The UE is connected to both a master evolved NodeB (MeNB), associated with the MCG, and a secondary eNB (SeNB), associated with the SCG, in dual connectivity.