In-Device Coexistence Interference Control via DRX Reconfiguration
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Solution Overview
Problem
In wireless communication systems, particularly in LTE and IEEE 802.16m networks, the increased bandwidth required for enhanced transmission capacity leads to power consumption issues and in-device coexistence interference (IDC) between different frequency bands, such as Bluetooth and 802.16 systems, which has not been effectively coordinated.
Innovation Solution
A method and apparatus for controlling IDC through Time Division Multiplexing (TDM) operations, including reconfiguring TDM patterns and autonomously denying Industrial Scientific Medical (ISM) band transmissions, by transmitting IDC indication information to an evolved NodeB (eNB) and reconfiguring Discontinuous Reception (DRX) settings to mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bandwidth is extended to increase transmission capacity, then transmission capacity is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic bandwidth adjustment where the terminal autonomously determines the bandwidth based on service requirements. The terminal can flexibly configure the bandwidth to match actual transmission needs rather than using a fixed large bandwidth, thereby reducing power consumption while maintaining sufficient transmission capacity for the specific service.
2Adaptability or versatility
If multiple network systems are supported simultaneously in a single terminal, then user convenience is improved, but in-device coexistence interference occurs
Solution Approach 1:
The patent applies preliminary action by having the terminal detect and report IDC conditions to the network before they cause interference. The terminal monitors for potential interference between different network systems (e.g., LTE and Wi-Fi) and proactively notifies the eNB, allowing the network to take preventive measures such as adjusting scheduling or power settings to avoid interference occurring in the first place.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal continuously monitors IDC conditions and provides feedback to the eNB through IDC indication information. This feedback loop enables the network to receive real-time information about interference conditions and adjust its operations accordingly, resolving the conflict between supporting multiple networks and preventing interference.
Data Source
AI summary
A method and an apparatus for controlling in-device coexistence interference (IDC) in a wireless communication system are provided. The present invention comprises transmitting IDC indication information including an unusable frequency band that is a frequency band in which performing communication is difficult because of IDC interference to a Base Station (BS), receiving Radio Resource Control (RRC) connection reconfiguration including IDC Discontinuous Reception (DRX) configuration reconfiguring DRX relating the unusable frequency band based on the IDC indication information from the BS and performing autonomously denial of Industrial Scientific Medical (ISM) transmission in the unusable frequency band by reconfiguring DRX based on the IDC DRX configuration.