D2D Discovery Control via Autonomous UE Information Sufficiency
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Solution Overview
Problem
Current D2D communication systems lack efficient control mechanisms for the device-to-device discovery process, leading to excessive signaling burden and inefficient resource usage due to frequent network involvement.
Innovation Solution
A method and apparatus for controlling the D2D discovery process in user equipment, where guiding information from the base station is used to determine the sufficiency of discovery information, allowing for either direct communication or requesting further assistance from the network, thereby reducing network involvement and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent network involvement in D2D discovery process is used, then discovery reliability is improved, but signaling burden and resource usage increase
Solution Approach 1:
The user equipment autonomously determines whether discovery information is sufficient by comparing it with guiding information received from the base station. The UE independently makes decisions about continuing discovery procedures or requesting further assistance, eliminating the need for constant network intervention and reducing signaling burden while maintaining reliable discovery.
Solution Approach 2:
The base station provides guiding information about D2D services in advance through broadcasted system information. This preliminary information enables the user equipment to pre-evaluate whether discovered UE information is sufficient, allowing for more efficient discovery processes without requiring continuous network verification.
2Measurement precision
If network provides detailed guiding information on D2D services, then discovery accuracy is improved, but network resource consumption increases
Solution Approach 1:
The base station provides guiding information selectively based on the actual discovery needs of user equipment. The system uses partial information from the network to enable autonomous UE decision-making, avoiding the need for the network to provide complete detailed information while still achieving sufficient discovery accuracy.
Data Source
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AI summary
One of the embodiments of the present invention relates to a method for controlling a D2D discovery process at a discovering user equipment. The method comprises determining by the discovering user equipment whether discovery information in a discovering message received from a discovered user equipment is sufficient for performing the D2D discovery process or not. In response to a positive result of the determination, the user equipment continues the discovery procedure without involvement of network node, at least by using the discovery information in the discovering message; in response to a negative result of the determination, the user equipment sends a request to a network node for assistance on further discovery information for performing the D2D discovery process, and then receives the further discovery information from the network node. Embodiments of the present invention also provide methods, apparatuses and computer program products.