Full Duplex Radio Base Station Logic Cell Configuration
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Solution Overview
Problem
Existing full duplex radio communication implementations are costly and time-consuming to standardize and deploy due to incompatibility with existing radio communication standards and facilities, limiting their adoption in radio communication networks.
Innovation Solution
A method and apparatus for an RBS that configures two logic cells with different downlink/uplink configurations, allowing simultaneous data transmission and reception while suppressing self-interference, ensuring compatibility with existing standards without substantial modifications to radio frame structure or multi-access schemes, enabling gradual upgrade of communication facilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex communication is implemented in existing radio networks, then system throughput is increased, but compatibility with existing standards and facilities deteriorates
Solution Approach 1:
The RBS is divided into multiple logic cells, each capable of independent TDD configuration. This segmentation allows different logic cells to operate with different DL/UL configurations, enabling full duplex communication in specific subframes while maintaining TDD operation in others, thus preserving compatibility with existing standards and facilities.
Solution Approach 2:
The system dynamically selects which logic cell to use for each subframe based on whether full duplex or TDD operation is desired. The RBS can switch between different DL/UL configurations dynamically, allowing flexible adaptation between full duplex mode (higher throughput) and TDD mode (better compatibility) without requiring complete system redesign.
2Productivity
If full duplex communication is implemented, then data transmission and reception occur simultaneously, but self-interference increases
Solution Approach 1:
The harmful self-interference signal is extracted and separately processed from the desired uplink signal. The RBS identifies and removes the downlink signal that leaks into the uplink reception path, allowing the desired uplink signal to be recovered without interference from simultaneous downlink transmission.
Solution Approach 2:
The system converts the harmful self-interference into a beneficial feature by using the known downlink signal characteristics to pre-cancel the interference. The downlink signal that causes interference is actually used as reference information to generate and subtract the interference component from the received signal, turning a harmful effect into a useful cancellation mechanism.
3Ease of manufacture
If existing RBSs are modified for full duplex operation, then device complexity increases, but upgrade cost decreases
Solution Approach 1:
The RBS is designed with universal logic cell structures that can operate in multiple modes (TDD and full duplex) without requiring completely different hardware architectures. The same physical RBS can be configured to perform different functions by changing software parameters and logic cell assignments, reducing the need for specialized hardware modifications while enabling full duplex capability.
Data Source
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AI summary
The present disclosure provides a full duplex communication method implemented by a Radio Base Station (RBS) supporting Time Division Duplex (TDD) scheme and the associated RBS. The method comprises configuring a first logic cell and a second logic cell for the RBS by specifying a first downlink/uplink (DL/UL) configuration corresponding to the first logic cell and a second, different DL/UL configuration corresponding to the second logic cell. The method also comprises transmitting a first wireless signal to a first UE associated with one of the first and the second logic cells and receiving a second wireless signal from a second UE associated with the other of the first and the second logic cells simultaneously in a subframe, which is allocated for DL communication according to one of the first and the second DL/UL configurations corresponding to the one of the first and the second logic cells and is allocated for UL communication according to the other of the first and the second DL/UL configurations corresponding to the other of the first and the second logic cells. Self-interference suppression is performed to suppress interference from the transmission of the first wireless signal to the reception of the second wireless signal.