DRS Signal Collision Avoidance in 5G LAA
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Solution Overview
Problem
In the LAA system, there is a challenge in ensuring the transmission and detection of Discovery Reference Signals (DRS) due to overlapping resources with other reference signals, leading to signal collisions and potential misdetection by User Equipment (UE) in serving or neighbor cells, which affects the Quality of Service (QoS) and interference management.
Innovation Solution
A method and device that determine overlapping resources between DRS and other reference signals, allowing for the selection and transmission of specific signals based on predefined modes to mitigate collisions, ensuring proper transmission and detection of DRS signals within DL transmission bursts and partial subframes, while avoiding interference with other communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DRS and other reference signals are transmitted simultaneously on overlapping resources, then transmission efficiency is improved, but signal collision occurs leading to misdetection by UE
Solution Approach 1:
The patent segments the time-frequency resources by introducing a parameter set that divides the resource space into distinct regions. This allows DRS and other reference signals to be transmitted without collision by assigning different resource segments, thereby maintaining transmission efficiency while preventing misdetection.
Solution Approach 2:
The patent introduces a parameter set as an intermediary mechanism that mediates between DRS and other reference signals. This parameter set acts as a coordinator to manage resource allocation, ensuring that signals with overlapping resources are properly distinguished by the UE through the parameter information.
2Reliability
If DRS transmission is restricted to avoid collision with other reference signals, then signal detection accuracy is improved, but transmission probability of DRS decreases
Solution Approach 1:
The patent implements dynamic resource allocation where the transmission of DRS and other reference signals is determined based on the parameter set. This dynamic approach allows the system to adaptively decide which signals to transmit and when, maximizing transmission probability while ensuring accurate detection through proper resource differentiation.
3Device complexity
If resource overlap between DRS and other reference signals is allowed, then device complexity is reduced, but interference with other communication systems increases
Solution Approach 1:
The patent utilizes parameter changes by introducing a parameter set that modifies the resource characteristics. By changing the resource allocation parameters, the system can allow simple device implementation while preventing interference with other communication systems through proper parameter-based resource differentiation.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). Embodiments of the present disclosure provide a method for transmitting signals. The method includes: determining, by a communication node, that resources of a DRS and resources of other types of reference signals are overlapped; and selecting, by the communication node, at least one type of signal from the DRS and the other types of reference signals according to a predefined mode and transmitting the selected signal. Embodiments of the present disclosure may further disclose a corresponding method and device for receiving signals, a method and device for determining transmission power of the reference signals and a method for transmitting the DRS in a DL transmission burst including the data. With embodiments of the present disclosure, the confusion of the measurement of the DRS and the measurement of other types of reference signals may be solved.