D2D Resource Allocation in Wireless Systems
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Solution Overview
Problem
New generation device-to-device (D2D) communication technologies face challenges in resource allocation and interference with existing wireless communication systems, necessitating an effective resource allocation technology to prevent core network congestion and ensure efficient communication.
Innovation Solution
A wireless communication system and method that enables a base station or user equipment (UE) to evaluate and transmit resource allocation information for D2D communication and device-to-device discovery, allowing UEs to perform D2D communication and discovery based on pre-existing resource conditions and needs, thereby avoiding resource contention and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication is implemented on existing wireless communication architecture, then direct communication between UEs is achieved with reduced transmission power and delay, but resource contention and interference with existing systems occurs
Solution Approach 1:
The patent segments the wireless communication system into two distinct resource pools: one for traditional cellular communication and another for D2D communication. This segmentation allows D2D communications to operate on dedicated resources without interfering with existing cellular operations, while still enabling direct UE-to-UE communication for improved efficiency.
Solution Approach 2:
The base station acts as an intermediary that manages and coordinates resource allocation between cellular and D2D communications. It evaluates resource conditions and transmits resource allocation information to UEs, ensuring that D2D communications are scheduled without causing interference to existing cellular operations.
2Reliability
If all data and control signals are processed by base station and core network, then centralized control is maintained, but core network congestion occurs
Solution Approach 1:
The patent extracts the resource allocation decision-making function from the core network and places it at the base station level. The base station evaluates local resource conditions and directly allocates resources for D2D communications, eliminating the need for core network involvement in real-time resource management and avoiding core network congestion while maintaining centralized control.
3Adaptability or versatility
If resource allocation information is transmitted by base station, then centralized resource management is achieved, but signaling overhead increases
Solution Approach 1:
The base station performs preliminary resource evaluation and pre-allocates resource pools for D2D communications before actual D2D sessions are established. This preliminary action allows UEs to autonomously select resources from pre-configured pools, reducing the need for continuous signaling and minimizing overhead while maintaining flexible resource allocation.
Data Source
AI summary
A wireless communication system and a resource allocation method thereof are provided. The wireless communication system includes a base station and a plurality of user equipments. The base station or one of the user equipments is configured to transmit resource allocation information to the user equipments. The user equipments are configured to perform a device-to-device communication and/or perform a device-to-device discovery according to the resource allocation information. The resource allocation method is applied to the wireless communication system to perform the aforesaid operations.