Unlicensed Wireless Signaling With Shared LBT for RRC and Reference Signals
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Solution Overview
Problem
Existing wireless communication systems face issues with limited transmission opportunities on unlicensed carriers due to Listen Before Talk (LBT) operations and interference, particularly with reference signals and RRC messages, which can impact user experience and energy consumption.
Innovation Solution
Transmitting reference signals and RRC messages together using the same or continuous time units, with synchronized time offsets and periodicities, to reduce LBT requirements and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reference signals and RRC messages are transmitted separately in different time instances on unlicensed carriers, then each signal can be transmitted with its own timing requirements, but multiple LBT attempts are necessary and inter-node interference increases
Solution Approach 1:
The patent combines reference signals and RRC messages into a single transmission opportunity on unlicensed carriers. By merging these previously separate transmissions into one unified transmission event, the system performs only one LBT operation instead of multiple separate LBT attempts, thereby reducing transmission time and improving overall efficiency while maintaining signal reliability.
2Adaptability or versatility
If reference signals and RRC messages are transmitted separately, then each signal can have independent timing, but energy consumption increases due to multiple LBT attempts
Solution Approach 1:
The patent merges reference signals and RRC messages into a single transmission opportunity, reducing the number of LBT attempts from multiple to one. This significantly lowers energy consumption associated with repeated channel access procedures while maintaining the necessary timing flexibility through coordinated scheduling of the combined transmission.
3Ease of manufacture
If reference signals and RRC messages are transmitted separately, then each signal can be optimized independently, but inter-node interference increases
Solution Approach 1:
The patent combines reference signals and RRC messages into a single transmission opportunity, which reduces inter-node interference by minimizing the number of separate transmission events on unlicensed carriers. The combined transmission is scheduled coordinate, maintaining configuration flexibility while reducing harmful interference effects.
4Reliability
If multiple LBT attempts are performed for reference signal and RRC message transmission, then channel access reliability improves, but transmission opportunity is reduced
Solution Approach 1:
The patent merges reference signals and RRC messages into a single transmission opportunity with one LBT operation. This approach maintains channel access reliability through proper LBT execution while significantly improving productivity by increasing the number of successful transmission opportunities on unlicensed carriers.
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatuses of transmitting information and receiving information in a wireless communication system. In the method of transmitting information, the information comprises at least two of a reference signal and more than one radio resource control (RRC) message. The method comprises transmitting the at least two of the reference signal and the more than one RRC message by using a same time unit or at least two continuous time units, wherein the at least two of the reference signal and the more than one RRC message have a same time offset or different time offsets and have a same transmission periodicity or transmission periodicities which are different multiples of a predetermined periodicity. Thus, the interference to other systems or nodes can be limited, and the number of LBTs required for these signal transmissions can be reduced if they are transmitted on unlicensed spectrum.