Prohibit Counter Mechanism for In-Device Coexistence Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In-device coexistence (IDC) interference occurs between different wireless interfaces in user equipment (UE) operating in adjacent or overlapping radio frequency bands, such as LTE, ISM, and GNSS, leading to signal interference and sub-optimal data communication performance, especially with dynamically fluctuating traffic.
Innovation Solution
A prohibit counter mechanism is introduced to control the frequency of IDC indications, allowing timely reporting of interference while reducing signaling overhead, by setting a maximum count value for transmissions and using a prohibit timer to manage when IDC indications are sent, thereby optimizing IDC interference handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If IDC indications are transmitted frequently to report interference timely, then interference reporting responsiveness is improved, but signaling overhead increases
Solution Approach 1:
The patent implements a prohibit counter mechanism that periodically restricts IDC indication transmissions. The counter increments with each IDC indication sent and compares against a threshold value, creating periodic transmission windows separated by prohibited periods. This periodic action reduces signaling overhead while maintaining timely interference reporting during critical periods.
Solution Approach 2:
The patent dynamically adjusts the prohibit counter threshold based on interference conditions and traffic patterns. When interference is detected, the system can modify the threshold value to allow more frequent indications, and when interference subsides, it increases the restriction. This dynamic adjustment optimizes the balance between reporting responsiveness and signaling overhead.
2Loss of information
If multiple UEs transmit IDC indications simultaneously, then interference reporting completeness is improved, but unfairness among UEs increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring prohibit counters and threshold values for each UE before interference events occur. This pre-configuration establishes a fair baseline for all UEs, preventing simultaneous transmissions and ensuring orderly access to the network for interference reporting.
Solution Approach 2:
The system implements feedback mechanisms where the network monitors IDC indication patterns from multiple UEs and adjusts individual prohibit counter thresholds based on observed behavior. This feedback loop ensures that UEs with excessive transmission patterns receive stricter control, maintaining fairness while preserving overall interference reporting completeness.
Data Source
AI summary
A user equipment is able to transmit, to a wireless access node, an indication of in-device coexistence (IDC) interference between the wireless interfaces. The user equipment can include a counter to track a number of transmissions having the indication of IDC interference.