D2D Resource Allocation Adaptation in Mobile Networks
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Solution Overview
Problem
Existing mobile communication systems face challenges in efficiently adjusting resources for device-to-device (D2D) discovery and communication without increasing the processing load on non-ProSe-enabled user equipment, particularly when the number of user equipment in a base station's coverage area increases.
Innovation Solution
Transmitting information about updated resource allocations for D2D discovery and communication within existing resource elements, specifically using physical resource elements of the current allocated resources, allowing only ProSe-enabled user equipment to process this information, thus reducing unnecessary processing loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If information on updated resource allocation is transmitted in system information block messages, then all user equipments can receive the information, but non-ProSe-enabled user equipments also process the information causing processing overheads
Solution Approach 1:
The patent extracts the resource allocation information transmission from the general system information block messages and places it specifically within the physical resource elements that are already allocated for ProSe communication. This extraction ensures that only ProSe-enabled user equipments will process this information, as non-ProSe-enabled devices ignore these specific resource elements for their intended purpose.
Solution Approach 2:
The patent applies local quality by making the information transmission location-specific - using particular physical resource elements within the ProSe-allocated resources rather than broadcasting in general system information. This localized approach ensures that the information is delivered reliably to target devices while avoiding unnecessary processing by non-target devices.
2Reliability
If information on updated resource allocation is transmitted in RRC signaling, then the information can be delivered to connected user equipments, but the traffic load on the air interface of the radio access network increases
Solution Approach 1:
The patent merges the resource allocation information transmission with the existing ProSe physical resource elements. Instead of using separate RRC signaling messages, the information is embedded within the physical resource allocations that are already being used for ProSe communication, thereby utilizing existing communication channels efficiently.
Solution Approach 2:
The patent makes the physical resource elements serve multiple functions - they continue to allocate resources for ProSe communication while simultaneously carrying the updated resource allocation information. This multi-functionality eliminates the need for additional dedicated signaling channels.
3Adaptability or versatility
If the number of user equipments in coverage area increases, then more devices need to be supported, but the existing resource allocation may severely affect communication between user equipments and radio access network
Solution Approach 1:
The patent implements dynamic resource allocation by enabling the base station to update and reassign physical resource elements for ProSe communication based on current network conditions and device density. This dynamic adjustment allows the system to adapt to increasing numbers of user equipments while maintaining reliable communication with the radio access network.
Solution Approach 2:
The patent establishes a feedback mechanism where the base station monitors network conditions and device density, then uses the physical resource elements to transmit updated allocation information back to ProSe-enabled devices. This closed-loop feedback enables continuous optimization of resource allocation to balance D2D communication needs with network access requirements.
Data Source
AI summary
To allocate resources for a device-to-device discovery and/or communication to at least one user equipment of a mobile communication network, the at least one user equipment is informed of a change of the resources allocated for the device-to-device discovery and/or communication from first allocated resources to second allocated resources. To inform the at least one user equipment of the change, a base station or a user equipment which act as central controller for a group of users of the mobile communication network transmits information on the second allocated resources in at least one physical resource element of the first allocated resources.