Sub-Band Full Duplex Rate-Match Pattern for Interference Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sub-band full duplex communication due to the lack of effective methods for indicating the location of uplink sub-bands and guard bands, leading to interference between uplink and downlink data communications.
Innovation Solution
The implementation of a rate match pattern that identifies the location of uplink sub-bands and guard bands for sub-band full duplex communication, allowing resources to be avoided for downlink data communication, thereby facilitating efficient communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If sub-band full duplex communication is implemented without rate match pattern indication, then device complexity is reduced, but interference between uplink and downlink data communications increases
Solution Approach 1:
The network node performs preliminary action by transmitting rate match pattern indication before the actual data communication. This indication pre-configures the UE about which resources should be avoided for downlink data communication, allowing the UE to prepare its receiver accordingly and avoid interference without needing complex real-time coordination during data transmission.
Solution Approach 2:
The rate match pattern indication serves as an intermediary element between the network node and UE. It carries information about uplink sub-band and guard band locations, mediating the coordination between uplink and downlink communications. This intermediary mechanism allows the system to manage interference without requiring direct complex interaction during the data transmission phase.
2Reliability
If rate match pattern indication is transmitted for sub-band full duplex communication, then interference is minimized, but communication overhead increases
Solution Approach 1:
The rate match pattern indication is designed to serve multiple functions simultaneously. It not only indicates the location of uplink sub-bands and guard bands for avoiding interference, but also provides the UE with the information needed to properly receive downlink data communications. This multi-functional indication reduces the need for separate signaling messages, thereby limiting the increase in communication overhead while improving reliability.
3Productivity
If downlink data communication avoids resources indicated by rate match pattern, then spectral efficiency is improved, but available downlink bandwidth is reduced
Solution Approach 1:
The frequency spectrum is segmented into different sub-bands, with specific segments designated for uplink communication and others for downlink communication. The rate match pattern indication identifies which frequency segments should be avoided for downlink data communication to prevent interference with uplink transmissions. This segmentation allows the system to optimize spectral efficiency by ensuring that uplink and downlink communications occupy distinct frequency portions, even though it reduces the total available bandwidth for downlink data.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of whether a rate match pattern indicates a location of an uplink sub-band and at least one guard band for sub-band full duplex communication, the rate match pattern identifying resources that are to be avoided for downlink data communication. The UE may communicate according to the rate match pattern based at least in part on the indication. Numerous other aspects are described.