Wireless Component Carrier Discovery Signal Selection
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Solution Overview
Problem
In Device-to-Device (D2D) communication systems, the existing methods for transmitting and receiving discovery signals across multiple carriers lead to increased discovery delay and power consumption due to the need for devices to search through all component carriers, causing network overload and inefficiency.
Innovation Solution
A method where the device decides the component carrier for transmitting and receiving discovery signals based on factors such as frequency band, device ID, measurement results, and service type, reducing the search load by selecting a carrier with optimal characteristics for signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices search through all component carriers for discovery signals, then complete carrier search is achieved, but discovery delay and power consumption increase
Solution Approach 1:
The patent applies local quality by determining that not all component carriers need to be searched uniformly. Instead, devices identify and search only in specific component carriers that have favorable characteristics (such as lower interference levels or optimal signal conditions), thereby reducing the search scope while maintaining reliable discovery signal detection in the most promising carriers.
Solution Approach 2:
The patent changes the parameter of search scope from all component carriers to a subset of component carriers selected based on their characteristics. This parameter change is achieved by evaluating carrier properties (interference levels, signal strength, etc.) and adjusting the search strategy accordingly, which reduces discovery delay while maintaining detection reliability.
2Reliability
If devices search through all component carriers for discovery signals, then complete carrier search is achieved, but power consumption increases
Solution Approach 1:
The patent applies local quality by focusing the search effort only in component carriers with favorable characteristics rather than uniformly searching all carriers. This selective approach reduces the total energy consumption while maintaining reliable discovery signal detection in the most promising carriers.
Solution Approach 2:
The patent applies partial action by searching only a subset of component carriers instead of all carriers. This partial search is justified by selecting carriers with optimal characteristics, which reduces power consumption while still achieving reliable discovery signal detection without requiring exhaustive search of every carrier.
3Reliability
If devices search through all component carriers, then comprehensive signal search is achieved, but device complexity increases
Solution Approach 1:
The patent applies local quality by reducing the search scope to specific component carriers with favorable characteristics. This approach simplifies the search processing complexity while maintaining reliable discovery signal detection in the most promising carriers, avoiding the need to process all carriers uniformly.
Solution Approach 2:
The patent changes the search parameter from comprehensive carrier search to selective carrier search based on characteristics. This parameter change reduces the processing complexity by limiting the search space to a subset of carriers that are more likely to contain discovery signals, while still maintaining detection reliability.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3~4
AI summary
An embodiment of the present invention is a method for transmitting and receiving signals between a device and a device in a wireless communication system, comprising the steps of: determining a component carrier wave in which a discovery signal among two or more component carrier waves is transmitted; and detecting a discovery signal on the determined component carrier wave, wherein the component carrier wave in which the discovery signal is transmitted is determined on the basis of one among a frequency band of the component carrier wave, a device ID, a measurement result and a service type.