D2D Discovery Resource Pool Segmentation for Interference Reduction
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Solution Overview
Problem
In 5G wireless communication systems, the existing D2D discovery process faces challenges such as interference, power consumption issues, and the inability to differentiate between public safety (PS) and non-PS discovery messages, leading to inefficient transmission and reception of D2D discovery messages, especially when operating within or outside network coverage.
Innovation Solution
The proposed solution involves an apparatus and method that separates discovery resources for D2D UEs within and outside network coverage, using type-specific resource pools for PS and non-PS discovery processes, allowing for efficient transmission and reception of D2D discovery messages by identifying and managing PS and non-PS messages separately, thereby reducing interference and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If D2D UEs use common discovery resources for both PS and non-PS discovery processes, then resource utilization is simplified, but interference increases and message differentiation becomes difficult
Solution Approach 1:
The patent segments discovery resources into separate resource pools: first type-discovery resource pools for PS discovery processes and second type-discovery resource pools for non-PS discovery processes. This segmentation allows D2D UEs to perform different discovery processes on dedicated resources, eliminating interference between PS and non-PS messages while enabling clear message differentiation through resource type identification.
2Reliability
If D2D UEs transmit discovery messages using network-configured discovery resources, then transmission coordination is improved, but power consumption increases due to continuous monitoring requirements
Solution Approach 1:
The patent segments discovery resource pools into type 1 and type 2 categories with distinct monitoring requirements. Type 1 resource pools allow UEs to monitor only specific resource types configured for their discovery needs, while type 2 resource pools enable more flexible monitoring strategies. This segmentation reduces unnecessary continuous monitoring and lowers power consumption while maintaining reliable transmission coordination through eNB-configured resources.
3Object-affected harmful factors
If separate type-specific discovery resource pools are used for PS and non-PS discovery processes, then interference is reduced and message identification is improved, but device complexity increases
Solution Approach 1:
The patent introduces type-discovery resource pool information as an intermediary layer between the eNB and D2D UEs. The eNB configures and transmits this information, which serves as a mediator that guides UEs on which resource pools to use for specific discovery processes. This intermediary simplifies UE device complexity by providing clear, pre-configured resource pool mappings rather than requiring UEs to independently manage complex resource allocation logic.
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 a long term evolution (LTE). The present disclosure relates to a method of an evolved node B (eNB), comprising: transmitting at least one of first information as information on at least one first type-discovery resource pool including first type-discovery resources and second information as information on at least one second type-discovery resource pool including second type-discovery resources, or transmitting discovery resource information on at least one discovery resource which corresponds to a discovery resource type requested from a user equipment (UE).