Virtual Cell Parameter Configuration for LTE Interference Management
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Solution Overview
Problem
The introduction of CoMP in wireless communication networks complicates interference suppression and interference cancellation due to complexity in data region interference cancellation, particularly with variations in transmission schemes, reference signals, and resource allocations across cells, making it unfriendly for effective interference management.
Innovation Solution
Configuring virtual cells with specific sets of parameters for user equipment (UEs) to perform interference suppression or cancellation, where UEs determine whether they are part of a configured set and apply default or obtained parameters for interference management, facilitating coordinated multipoint operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CoMP techniques are implemented to improve network performance and turn inter-cell interference into useful signal, then overall quality and network utilization are improved, but interference suppression and cancellation become complicated due to variations in transmission schemes, reference signals, and resource allocations across cells
Solution Approach 1:
The patent segments the complex CoMP interference management into distinct transmission modes (Mode 1-10) with specific parameter configurations. Each mode handles interference differently, allowing the system to break down the complex problem of inter-cell interference into manageable segments with predefined solutions, thus reducing overall management complexity while maintaining performance improvements.
Solution Approach 2:
The patent employs parameter changes by configuring different transmission schemes, reference signal patterns, and resource allocation parameters across various cells in the CoMP set. By dynamically adjusting these parameters based on the selected transmission mode and channel conditions, the system can transform harmful inter-cell interference into useful signals, improving reliability while managing complexity through controlled parameter variation.
2Area of stationary object
If CoMP coordination is extended to larger areas with multiple eNBs and RRHs, then coverage and capacity are improved, but implementation difficulty increases due to fiber infrastructure requirements and high data rate transmission
Solution Approach 1:
The patent introduces fiber optic links as intermediaries between eNBs and RRHs to enable CoMP coordination over large areas. The fiber infrastructure acts as a mediator that transports high-rate data between distributed transmission points, allowing the system to extend coverage area while managing implementation difficulty through a dedicated communication medium designed for high-speed data transmission.
Solution Approach 2:
The patent extends CoMP from traditional two-dimensional cellular coverage to a three-dimensional architecture by deploying RRHs in spatial distributions that can be connected via fiber backhaul. This dimensional extension allows coverage to expand beyond the limitations of single eNB radio range, creating layered network structures that improve coverage area while using fiber infrastructure to manage the complexity of coordinating distant transmission points.
Data Source
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AI summary
In some aspects, a method for performing wireless communication includes configuring a set of virtual cells for user equipments (UEs). One or more virtual cells of the set is associated with at least one set of parameters. The method also includes transmitting information, to the UEs, regarding the set of the virtual cells, and operating, for a same virtual cell, according to a same set of parameters for some or all of the UEs. In other aspects, a method for performing wireless communications includes receiving, from a node, information regarding, for a UE, a set of virtual cells associated with a set of parameters. The method also includes communicating with the node. The communication is based on a virtual cell and its associated set of parameters.