In-band Interleaved Uplink Downlink Full Duplex
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Solution Overview
Problem
Current wireless communication systems, particularly in the context of 5G NR, face inefficiencies in resource utilization due to unused frequency resources between uplink and downlink transmissions in full-duplex operations, leading to suboptimal use of wireless spectrum.
Innovation Solution
Implementing a method for full-duplex communication that allows simultaneous uplink and downlink transmissions to overlap in time using interlaced patterns over allocated resource blocks, enabling efficient use of wireless resources by allowing devices to transmit and receive data concurrently within the same frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional half-duplex communication is used with separate frequency resources for uplink and downlink, then interference between directions is avoided, but spectrum efficiency deteriorates due to unused frequency resources
Solution Approach 1:
The patent merges uplink and downlink transmissions in the same frequency resources by using interleaved patterns. Specifically, uplink and downlink resource blocks are interleaved in the frequency domain, allowing both directions to share the same spectrum simultaneously. This resolving the contradiction by combining previously separate resources while maintaining signal integrity through the interleaving structure.
Solution Approach 2:
The patent segments the frequency resources into interleaved patterns where uplink and downlink transmissions are distributed across different subcarriers and resource blocks. By segmenting the spectrum into interleaved slots for different directions, the system enables full-duplex operation while managing interference through the segmented structure.
2Loss of time
If full-duplex transmission with overlapping uplink and downlink in time is implemented, then latency is reduced, but self-interference increases
Solution Approach 1:
The patent segments the frequency spectrum into interleaved resource blocks where uplink and downlink transmissions are distributed across different frequency slots. This segmentation allows simultaneous transmission in the same time frame while spatially separating the signals in the frequency domain, thus reducing self-interference while achieving low-latency full-duplex communication.
Solution Approach 2:
The patent moves the separation of uplink and downlink from the time domain to the frequency domain by using interleaved resource block patterns. Instead of separating transmissions in time (TDMA), the system separates them in frequency through interleaving, enabling simultaneous time-domain transmission while maintaining directional separation through frequency-domain interleaving.
Data Source
AI summary
A user equipment (UE) receives an allocation of resources for full duplex communication including one or more resource block (RB) sets and receives an indication of an uplink interlace pattern for uplink transmission from the UE. The UE transmits, in a full duplex mode, the uplink transmission based on the allocation of the resources and the uplink interlace pattern and monitors, in the full duplex mode, for a downlink transmission over frequency resources of at least a part of the one or more RB sets comprising the uplink transmission from the UE.