Virtual Cell Coordination for 5G Uplink-Downlink Resource Allocation
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Solution Overview
Problem
In 5G wireless communications, the conventional TDD system faces challenges in dynamically configuring uplink and downlink sub-frames due to inter-user-terminal cross-slot interference, especially in ultra-dense networks, which affects cell-edge performance and spectrum efficiency.
Innovation Solution
A resource management method where a base station identifies cell-edge users, establishes a virtual cell through information exchange with adjacent base stations, and dynamically configures uplink-downlink resource allocation and transmission modes to ensure consistent transmission directions within the virtual cell, thereby mitigating cross-slot interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional TDD system dynamically configures uplink and downlink sub-frames, then spectrum efficiency is improved, but inter-user-terminal cross-slot interference occurs affecting cell-edge performance
Solution Approach 1:
The patent merges multiple base stations into a virtual cell structure where cell-edge users are served cooperatively by multiple base stations. This coordination allows consistent transmission direction configuration across the virtual cell, eliminating cross-slot interference while maintaining dynamic TDD flexibility and high spectrum efficiency.
Solution Approach 2:
The patent implements dynamic uplink-downlink configuration within the virtual cell framework, allowing the system to adapt transmission directions based on traffic demands while ensuring consistency across participating base stations. This dynamic adjustment maintains spectrum efficiency without generating cross-slot interference.
2Productivity
If ultra-dense networks are deployed to meet 5G traffic demand, then data rates are improved, but inter-user-terminal cross-slot interference increases
Solution Approach 1:
In ultra-dense networks, the patent combines multiple densely deployed base stations into virtual cells, coordinating their resource allocation to serve cell-edge users consistently. This coordination eliminates cross-slot interference that would otherwise be exacerbated by the high density of base stations, while maintaining the high data rates enabled by ultra-dense deployment.
3Adaptability or versatility
If cell-edge users are served with dynamic resource allocation, then adaptability to asymmetric traffic demands is improved, but cross-slot interference affects performance
Solution Approach 1:
The patent merges resource allocation decisions across multiple base stations serving a virtual cell, enabling coordinated adaptation to asymmetric traffic demands of cell-edge users. This joint optimization maintains adaptability while ensuring consistent transmission directions that eliminate cross-slot interference.
Solution Approach 2:
The patent implements dynamic resource allocation within the virtual cell framework, allowing real-time adaptation to asymmetric traffic patterns while maintaining consistent transmission direction configuration across all participating base stations, thereby avoiding cross-slot interference.
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 Long Term Evolution (LTE). The base station determines a cell edge user, receives information of a cell edge user in an adjacent cell; according to the information of cell edge users in the cell and the adjacent cell, establishes a virtual cell including the cell edge users, transmits configuration information of the cell edge user in the cell and configuration information of the cell to base stations each of which a cell edge user in the virtual cell is located at, and receives configuration information of each cell edge user and configuration information of a cell where the each cell edge user is located from a base station where the each cell edge user is located, and configures uplink-downlink resources and a transmission mode for the virtual cell.