NCR Uplink Buffering with Dedicated TDD Slot Coordination
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Solution Overview
Problem
Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in managing uplink and downlink transmissions in network-controlled repeaters (NCRs), which affect the performance of devices like UEs and gNBs.
Innovation Solution
A network-controlled repeater (NCR) system that receives and buffers uplink signals based on specific TDD configurations, allowing for flexible slot determination and coordinated transmissions between the NCR, UEs, and gNBs, enhancing communication efficiency and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a cell specific common TDD UL-DL configuration is used for NCR, then the system structure is simple, but the communication flexibility and efficiency are limited
Solution Approach 1:
The patent divides the TDD UL-DL configuration into two separate configurations: a cell-specific common configuration and an NCR-specific dedicated configuration. This segmentation allows each configuration to serve its specific purpose while maintaining overall system flexibility and efficiency without excessive complexity.
2Device complexity
If the NCR uses a common TDD UL-DL configuration, then the configuration management is simple, but the uplink and downlink transmission efficiency is reduced
Solution Approach 1:
The configuration is segmented into common and dedicated parts, where the common configuration provides baseline simplicity and the dedicated NCR-specific configuration optimizes transmission efficiency for NCR operations.
Solution Approach 2:
The patent applies local quality by providing NCR-specific TDD UL-DL configuration parameters that are tailored to the specific needs of NCR uplink and downlink transmissions, rather than using a one-size-fits-all common configuration.
3Speed
If the NCR buffers and forwards uplink slots dynamically, then the communication speed and flexibility improve, but the device complexity increases
Solution Approach 1:
The patent enables the NCR to perform preliminary actions by buffering uplink slots before forwarding them. This allows the NCR to prepare and manage uplink transmissions in advance, improving communication speed and flexibility through dynamic slot management.
Data Source
AI summary
A network controlled repeater (NCR) is described. The NCR may include receiving circuitry configured to receive a cell specific common time division duplex (TDD) uplink/downlink (UL/DL) configuration and a side information with an NCR dedicated TDD UL/DL configuration, determine candidate slots for uplink (UL) reception on an access link, receive an indication from a gNodeB (gNB) to receive an access uplink in a slot in the candidate slots for UL reception on the access link, receive UL transmissions in the slot on the access link, and buffer the receive UL slot for later forwarding to the gNB, determine slots for a backhaul link and/or a control link UL transmissions, and receive an indication from the gNB to forward a buffered UL in the backhaul link and/or the control link UL slot. The NCR may also transmit a previously buffered access link UL slot from a UE.