D2D Discovery Signal Format for Power Optimization
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face inefficiencies in D2D communication due to the lack of an effective method for UE-to-UE signal transmission, particularly in identifying the presence or absence of D2D data, which leads to unnecessary power consumption and complex communication procedures.
Innovation Solution
A method for transmitting a discovery signal by a first UE for D2D communication, including information on the presence or absence of D2D data, using a discovery signal format that differs based on the availability of D2D data, with optional inclusion of identifiers and compression levels for UEs transmitting and receiving data, and allocating resources accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs perform complete D2D communication procedures to ensure reliable data transmission, then communication reliability is improved, but power consumption increases and communication efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by performing a discovery signal check before initiating full D2D communication procedures. The UE examines the discovery signal in advance to determine whether D2D data is actually present, and only proceeds with complete communication procedures if necessary. This prevents unnecessary power consumption from executing full communication protocols when no data transmission is needed, while maintaining reliability when data is present.
2Reliability
If UEs execute full D2D communication procedures to ensure complete data transmission, then data transmission completeness is improved, but communication efficiency deteriorates due to unnecessary procedures
Solution Approach 1:
The patent implements preliminary action by checking the discovery signal before executing full D2D communication procedures. This preliminary check determines whether D2D data is present, allowing the UE to skip unnecessary communication stages when no data exists, thereby improving communication efficiency while maintaining transmission completeness when data is actually present.
Solution Approach 2:
The patent extracts the essential function of data transmission by using the discovery signal to identify whether D2D data is present. This extraction allows the system to perform only the necessary communication procedures - examining the discovery signal to determine data presence - and omit unnecessary steps, thus improving efficiency without sacrificing transmission completeness.
3Ease of operation
If D2D communication procedures are simplified to reduce complexity, then ease of operation is improved, but communication reliability may deteriorate due to skipped procedures
Solution Approach 1:
The patent applies dynamics by making the D2D communication process adaptive - the level of procedure execution dynamically adjusts based on the discovery signal content. When the discovery signal indicates no D2D data is present, the system simplifies operations by skipping procedures. When data is present, the full reliable communication procedures are executed. This dynamic approach maintains reliability while improving ease of operation through conditional simplification.
Data Source
AI summary
A method of transmitting a discovery signal by a first UE for device-to-device (D2D) communication in a wireless communication system according to the present invention includes a step of a first UE transmitting a discovery signal for identifying a second UE for D2D communication, wherein the discovery signal includes information related to the presence or absence of D2D data for the D2D communication.