Co-Channel Coexistence Using Configured Sensing and Channel Access
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Solution Overview
Problem
Current wireless networks fail to address harmonious co-channel coexistence between primary and secondary users of different radio access technologies, leading to inefficiencies in spectrum sharing.
Innovation Solution
Secondary UEs perform channel access and sensing procedures based on preconfigured conditions, including sensing configuration elements such as resource duration, slot number, and offset, to ensure successful transmission without collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spectrum sharing is implemented between primary and secondary users of different RATs, then wireless data traffic capacity is improved, but collision and interference between users occur
Solution Approach 1:
The patent applies preliminary action by requiring secondary users to perform channel sensing and execute channel access procedures before occupying shared spectrum resources. The network configures sensing parameters (sensing window size, threshold, timing) in advance, and UEs perform clear channel assessment (CCA) and listen-before-talk (LBT) operations before transmission, ensuring the channel is free of primary user activity and other secondary users before data transmission begins.
Solution Approach 2:
The patent introduces channel sensing and channel access procedures as intermediary mechanisms between secondary users and shared spectrum resources. These intermediaries detect primary user presence and coordinate secondary user access, preventing direct collision between primary and secondary users while enabling spectrum sharing.
2Reliability
If channel sensing and access procedures are implemented, then collision prevention is improved, but transmission delay increases
Solution Approach 1:
The patent applies dynamics by making channel sensing configuration adaptable and configurable based on channel conditions, traffic requirements, and network state. The network can dynamically adjust sensing window size, sensing threshold, and timing parameters to balance collision prevention and transmission delay. Different sensing configurations can be applied to different services, UEs, or channel conditions.
Solution Approach 2:
The patent employs parameter changes by allowing flexible configuration of channel sensing parameters including sensing window duration, energy detection threshold, number of sensing slots, and offset timing. These parameters can be adjusted to optimize the trade-off between reliable collision detection and minimizing access delay for different scenarios.
3Productivity
If sensing configuration elements are added to manage channel access, then resource allocation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a unified channel access framework that handles multiple functions through a single sensing configuration mechanism. The same sensing configuration parameters serve both collision avoidance and resource allocation purposes, and the framework accommodates different RATs (NR, LTE, Wi-Fi) and service types using the same basic procedure with configurable parameters.
Data Source
AI summary
Apparatus and methods are provided for co-channel coexistence in the wireless network. In one novel aspect, the UE performs channel access before occupying one or more resources. In one embodiment, the SU UE determines a sensing configuration based on one or more preconfigured conditions, performs a channel access based on the sensing configuration, and transmits a cyclic prefix extension signal between an end position of the channel access success and a starting position of the SU transceiving only when the channel access is successful, otherwise, the UE performs a new channel access. In one embodiment, the sensing configuration includes one or more elements comprising a number of SU resources configured for SU transceivings, a number of sensing slots for channel sensing, an offset between a beginning of the SU resources, a triggering position of the channel sensing and a cyclic prefix extension starting position. In one embodiment, the sensing configuration is based on resource reservation information.