In-Device Coexistence Interference Avoidance via Time Division
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Solution Overview
Problem
Current communication systems face significant challenges in managing coexistence interference between different radio technologies, such as LTE and ISM/GNSS, due to insufficient rejection of adjacent channel interference, leading to performance degradation and quality of service issues.
Innovation Solution
Implementing a buffer status reporting method and apparatus to efficiently signal uplink traffic volume, allowing for the allocation of time patterns that separate LTE and non-LTE signaling through time division multiplexing, thereby avoiding coexistence interference by inserting off-intervals into designated on-intervals based on traffic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE and non-LTE radio technologies operate concurrently in adjacent bands, then device functionality and connectivity are enhanced, but coexistence interference occurs causing performance degradation
Solution Approach 1:
The patent segments the operation time of different radio technologies by inserting off-intervals into on-intervals. This time-division approach separates LTE and non-LTE operations, allowing both to function while preventing simultaneous interference. The network configures specific time windows where each radio technology operates independently, resolving the contradiction between supporting multiple radios and maintaining communication quality.
2Object-affected harmful factors
If filters are used to address coexistence interference, then interference rejection is attempted, but sufficient rejection on adjacent channel interference is not achieved
Solution Approach 1:
The patent extracts the interfering radio operations from their continuous simultaneous execution and removes them during specific off-intervals. By taking out the non-LTE operations during LTE on-intervals and vice versa, the system achieves interference avoidance without relying on insufficient filter rejection, directly addressing the contradiction between interference rejection capability and reliability.
3Reliability
If time division multiplexing is implemented by inserting off-intervals into on-intervals, then coexistence interference is avoided, but signaling complexity and resource allocation overhead increase
Solution Approach 1:
The patent utilizes existing buffer status reporting mechanisms and uplink resource allocation procedures to convey off-interval insertion requirements. By making the existing signaling infrastructure multi-functional (handling both traditional buffer reporting and coexistence management), the system achieves interference avoidance without proportionally increasing signaling complexity, resolving the contradiction between reliability and device complexity.
4Productivity
If off-intervals are inserted based on buffer status reporting, then uplink resource allocation efficiency is improved, but additional signaling overhead is introduced
Solution Approach 1:
The patent merges the off-interval insertion indication with existing buffer status reporting messages. By combining multiple functions (buffer status reporting, resource allocation requests, and coexistence interference management) into a single signaling exchange, the system improves resource allocation efficiency while minimizing additional signaling overhead, effectively resolving the contradiction between productivity and information loss.
Data Source
AI summary
A method, system and device are provided for avoiding in-device coexistence interference between different radio technologies deployed in adjacent bands on the same device by reporting uplink buffer status information to the radio network and configuring LTE and non-LTE components to provide an in-device coexistence operation mode where non-LTE components use radio resources during the non-LTE on-intervals and during off-intervals inserted into the LTE on-intervals in response to predetermined trigger events.