IAB Node Paired Spectrum Carrier Configuration
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently utilizing paired spectrum for simultaneous uplink and downlink communications in integrated access and backhaul (IAB) nodes, leading to suboptimal spectral resource utilization and interference issues.
Innovation Solution
The implementation of a method where IAB nodes use a paired spectrum with a first frequency carrier for receiving communications and a second frequency carrier for transmitting, allowing both carriers to carry uplink and downlink data, enabling simultaneous operation and improved resource utilization through time division multiplexing or spatial division multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If IAB nodes use a single frequency carrier for both uplink and downlink communications, then device complexity is reduced, but spectral efficiency deteriorates due to inability to perform simultaneous transmission and reception
Solution Approach 1:
The patent segments the frequency spectrum into multiple carriers (first frequency carrier and second frequency carrier) to enable simultaneous uplink and downlink communications. By dividing the spectrum into distinct carriers, the system achieves full-duplex operation where transmission and reception can occur concurrently without interference, thereby improving spectral efficiency while maintaining manageable device complexity through structured carrier assignment.
2Productivity
If IAB nodes use paired spectrum with separate frequency carriers for uplink and downlink, then spectral efficiency is improved through simultaneous operation, but device complexity increases due to multi-carrier management
Solution Approach 1:
The patent introduces a frequency dimension by utilizing paired spectrum with separate first and second frequency carriers. This dimensional expansion allows the system to perform simultaneous uplink and downlink communications in the frequency domain, achieving full-duplex operation. The multi-carrier approach transforms the single-frequency limitation into a multi-frequency capability, improving spectral efficiency while the structured carrier management keeps complexity manageable.
3Device complexity
If IAB nodes use time division multiplexing for uplink and downlink on the same carrier, then device complexity is reduced, but loss of time increases due to sequential rather than simultaneous communication
Solution Approach 1:
The patent employs periodic action through the use of paired frequency carriers that operate in a cyclical pattern for uplink and downlink communications. By alternating between first and second frequency carriers for different communication directions, the system achieves time-division multiplexing across the frequency domain, allowing simultaneous operation without the time losses associated with strict sequential TDM on a single carrier.
4Object-affected harmful factors
If IAB nodes operate with single carrier for backhaul communication, then interference is reduced, but spectral resource utilization deteriorates due to inability to support simultaneous access and backhaul traffic
Solution Approach 1:
The patent introduces an intermediary frequency carrier structure where the first and second frequency carriers act as mediators between access and backhaul communications. By assigning different carriers to different communication functions (access uplink, access downlink, backhaul uplink, backhaul downlink), the system enables simultaneous operation of multiple traffic types while maintaining interference isolation through frequency separation, thereby improving spectral resource utilization without excessive interference.
Data Source
AI summary
A method, a computer-readable medium, and an apparatus are provided. The apparatus may be an IAB node. The apparatus may receive communication from one or more of a parent IAB node or a child IAB node using a first frequency carrier of a paired spectrum comprising the first frequency carrier and a second frequency carrier. The apparatus may transmit communication to the one or more of the parent IAB node or the child IAB node using the second frequency carrier in the paired spectrum. At least one of the first frequency carrier or the second frequency carrier in the paired spectrum carries both uplink and downlink communication.