Full-Duplex Pico Base Station Interference Reduction
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Solution Overview
Problem
In full-duplex wireless communication systems, interference occurs between communications nodes due to signal transmission and reception overlap, which affects the efficiency of heterogeneous networks.
Innovation Solution
A method where a pico base station performs full-duplex communication in a timeslot corresponding to an idle timeslot used by a macro base station, and the macro base station does not send or receive signals during that timeslot, aligning uplink and downlink timeslots to prevent simultaneous transmission and reception, thereby reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is used by both macro base station and pico base station, then spectrum efficiency is improved, but interference between communications nodes increases
Solution Approach 1:
The system segments the timeslots into different types (full-duplex timeslots and half-duplex timeslots) for macro base station and pico base station. Specifically, the macro base station uses half-duplex timeslots while the pico base station uses full-duplex timeslots, dividing the communication resources to avoid simultaneous transmission and reception that causes interference.
Solution Approach 2:
The system dynamically adjusts the duplex mode for different timeslots and different base stations. The macro base station switches between half-duplex and full-duplex modes depending on the timeslot configuration, while the pico base station maintains full-duplex operation. This dynamic adaptation allows the system to optimize spectrum efficiency while managing interference levels.
2Productivity
If macro base station and pico base station use same timeslots for transmission, then resource utilization is improved, but signal transmission to signal reception interference occurs
Solution Approach 1:
The timeslots are segmented into different functional types: full-duplex timeslots for pico base station and half-duplex timeslots for macro base station. This segmentation ensures that when macro base station is in half-duplex mode (not transmitting or receiving), pico base station can perform full-duplex communication, thereby avoiding interference while maintaining resource utilization.
Solution Approach 2:
The idle timeslot of the macro base station acts as an intermediary resource that enables the pico base station to perform full-duplex communication. During these idle timeslots, the macro base station does not transmit or receive signals, creating a window opportunity for the pico base station to utilize the full-duplex capability without causing or experiencing interference.
Data Source
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AI summary
Embodiments of the present invention relate to the field of communications technologies and provide a wireless communication method, a device, and a wireless communications system, so as to reduce interference between communications nodes caused by signal transmission to signal reception in a full-duplex wireless communications system. The method is applied to a wireless communications system in which a macro cell corresponding to a macro base station includes a small cell corresponding to a pico base station. The macro base station and the pico base station use a same carrier for communication. The method includes: sending, by the macro base station, a signal in a first downlink timeslot used by the macro base station; receiving, by the macro base station, a signal in a first uplink timeslot used by the macro base station; and skipping sending or receiving, by the macro base station, a signal in an idle timeslot used by the macro base station. The embodiments of the present invention are applied to full-duplex wireless communication.