Random Access Channel Preambles for In-Device Coexistence Interference Avoidance
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Solution Overview
Problem
Current communication systems face challenges in managing coexistence interference between different radio technologies, such as LTE, ISM, and GNSS, due to insufficient rejection of adjacent channel interference, leading to performance degradation and quality of service issues.
Innovation Solution
A method and system that utilize dedicated access preambles over a random access channel to send IDC indicators to the network, allowing for quick access and response to in-device coexistence interference, with the network providing interference avoidance solutions such as FDM or TDM through Random Access Response messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current filter technology is used to address coexistence interference, then device structure is maintained, but interference rejection is insufficient leading to performance degradation
Solution Approach 1:
The patent introduces a random access channel as an intermediary communication path between the UE and network node. This channel serves as a mediator to convey IDC indicators and enable coordinated interference avoidance, resolving the contradiction by adding a control layer without changing the physical filter structure.
Solution Approach 2:
The patent implements a feedback mechanism where the UE detects IDC interference conditions and sends indicators through the random access channel to the network node. The network then provides feedback with interference avoidance solutions, creating a closed-loop system that dynamically adjusts operation to reject interference effectively.
2Speed
If dedicated access preambles are allocated for IDC indication, then interference detection speed is improved, but random access channel resources are consumed
Solution Approach 1:
The patent segments the random access channel resources by allocating specific dedicated preambles for IDC indication purposes. This segmentation allows fast interference detection using dedicated resources while maintaining the ability to share other RACH resources, thus resolving the contradiction between speed and resource consumption.
Solution Approach 2:
The patent applies partial action by allocating only the necessary portion of RACH resources (specifically dedicated preambles) for IDC indication rather than dedicating the entire channel. This partial allocation enables fast detection capability while conserving overall channel resources for other purposes.
3Adaptability or versatility
If multiple radio technologies operate concurrently on the same device, then device versatility is improved, but coexistence interference increases
Solution Approach 1:
The patent introduces dynamic operation through the random access channel-based coordination mechanism. The system can dynamically adjust the operation of multiple radio technologies based on detected interference conditions, allowing versatile multi-radio support while managing coexistence interference through real-time network coordination.
Solution Approach 2:
The random access channel acts as an intermediary coordination layer between different radio technologies in the device. It enables the network node to mediate and coordinate the operation of multiple radios, resolving the contradiction by adding a control dimension that allows versatile operation with managed interference.
Data Source
AI summary
A method, system and device are provided for avoiding in-device coexistence interference between different radio technologies by allocating random access channel preambles to include one or more dedicated access preambles to be sued for sending IDC interference indication messages over a random access channel (RACH) to a radio access network. In response, the radio network provides control parameters and/or instructions for avoiding interference in a random access response message corresponding to the IDC interference indication message using one or more fields in the MAC subheader and payload fields of a designated IDC MAC PDU message.