ProSe D2D Discovery Resource Allocation for LTE Mobility
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE, face challenges in efficiently managing ProSe discovery resources and reducing signaling overhead during UE mobility, especially when UEs move between cells, leading to frequent resource reallocation and increased complexity.
Innovation Solution
The proposed solution involves methods for the BS to receive resource utilization indications from UEs and determine or coordinate resources for subsequent ProSe D2D discovery procedures, ensuring overlap with previously used resources to minimize reallocation, and sharing common resource pools among cells to reduce signaling costs and improve resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network reallocates resources for ProSe discovery procedure when UE moves between cells, then the ProSe discovery can be maintained, but the signaling overhead and complexity increase significantly
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple ProSe discovery resources (first and second resources) before UE mobility occurs. The network pre-allocates these resources and provides indication information to the UE in advance, so that when the UE moves between cells, it can immediately switch to the pre-configured resources without requiring reallocation signaling, thus reducing signaling overhead while maintaining discovery continuity
Solution Approach 2:
The patent implements dynamics by making the ProSe discovery resource configuration adaptable to UE mobility states. The network determines whether to provide first or second resources based on UE movement patterns, and the UE dynamically switches between different resource configurations based on received indication information, optimizing the balance between resource continuity and signaling efficiency
2Reliability
If the network reallocates resources for ProSe discovery procedure during UE mobility, then the discovery procedure can continue, but the resource utilization efficiency decreases
Solution Approach 1:
By pre-configuring multiple ProSe discovery resources and providing indication information to the UE before mobility occurs, the network avoids the need for reallocation signaling during handover. This preliminary preparation ensures that resources are efficiently utilized without being wasted on reallocation procedures, while maintaining continuous ProSe discovery functionality
Solution Approach 2:
The patent makes ProSe discovery resources universal by configuring resources that can serve multiple cells or multiple discovery scenarios. The first and second resources are configured in a way that can be used across different cells, reducing the need for cell-specific reallocation and improving overall resource utilization efficiency while maintaining discovery continuity during mobility
Data Source
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AI summary
Methods, corresponding apparatuses, and non-transitory computer readable mediums for a Proximity-based Service are provided. A method comprises receiving, from at least one user equipment, a resource utilization indication that indicates resources used by at least one user equipment for a ProSe device-to-device discovery procedure. The method also comprises determining, based on the received resource utilization indication, resources for the at least one user equipment to perform a subsequent ProSe device-to-device discovery procedure. The method additionally comprises signaling the determined resource to the at least one user equipment. With the claimed inventions, utilization efficiency of the radio resources may be improved and the complexity and overhead in allocating the resource for ProSe D2D discovery procedure may be lowered.