Network-Controlled Repeater Forwarding Across DTX/DRX Cycles
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Solution Overview
Problem
Network-controlled repeaters (NCRs) in wireless communications systems face inefficiencies due to improper resource forwarding during discontinuous transmission (DTX) and reception (DRX) cycles, leading to increased network energy expenditure and UE power consumption.
Innovation Solution
The network entity communicates DTX/DRX configurations to the NCR, allowing it to coordinate resource forwarding with active and inactive durations, ensuring resources are only forwarded during active times or dynamically granted periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the NCR forwards all periodic resources without considering DTX/DRX cycles, then resource forwarding is simple and continuous, but network energy expenditure and UE power consumption increase due to erroneous forwarding during inactive durations
Solution Approach 1:
The network entity provides the NCR with advance information about DTX/DRX cycle configurations and inactive durations before resources need to be forwarded. This allows the NCR to pre-determine which resources should be forwarded and which should be skipped, eliminating the need for real-time complex decisions and reducing energy waste from erroneous forwarding during inactive periods
Solution Approach 2:
The network entity provides feedback information about DTX/DRX cycle configurations to the NCR, enabling the NCR to adjust its resource forwarding behavior accordingly. This feedback mechanism allows the NCR to align its operations with network activity patterns, reducing energy consumption while maintaining appropriate control complexity through structured information exchange
2Reliability
If the NCR continuously monitors and forwards all resources, then communication reliability is maintained, but UE power consumption increases due to processing resources during inactive durations
Solution Approach 1:
The NCR receives advance information about which resources correspond to inactive durations from the network entity, allowing it to pre-determine that these resources should not be forwarded. This preliminary filtering action ensures the UE does not waste power processing irrelevant resources, while the NCR maintains reliability by only forwarding resources that are actually active and needed
Solution Approach 2:
The NCR extracts and removes resources corresponding to inactive durations from the set of periodic resources before forwarding them to the UE. This extraction process ensures that only relevant active resources are transmitted, reducing UE power consumption while maintaining communication reliability through selective forwarding based on network activity status
3Loss of energy
If the NCR implements proper DTX/DRX coordination, then power savings are achieved, but resource forwarding accuracy may be compromised if misalignment occurs
Solution Approach 1:
The network entity provides feedback information about DTX/DRX cycle configurations to the NCR, ensuring accurate alignment between resource forwarding and network activity patterns. This feedback mechanism enables the NCR to correctly identify active and inactive durations, achieving power savings without compromising forwarding accuracy through structured information exchange
Solution Approach 2:
The NCR dynamically adjusts its resource forwarding behavior based on the provided DTX/DRX cycle information, adapting its operation to match network activity patterns. This dynamic adjustment ensures accurate resource forwarding during active periods while achieving power savings during inactive periods, resolving the contradiction between efficiency and accuracy
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A network-controlled repeater (NCR) may obtain one or more messages that are indicative of a set of periodic resources to forward to one or more user equipment (UEs). The one or more messages may also indicate one or more inactive durations of a cell discontinuous transmission (DTX) cycle associated with a network entity, one or more inactive durations of a cell discontinuous reception (DRX) cycle associated with the network entity, or both. The NCR may then obtain the set of periodic resources from the network entity, and may output or forward at least a portion of the set of periodic resources to the one or more UEs. The NCR may forward the portion of the set of periodic resources that overlaps with one or more active durations of the cell DTX cycle, the cell DRX cycle, or both.