Relay Repeater Unit Rescheduling for IAF Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wireless communication relay/repeat methods are inefficient as they waste resources and consume power when expected physical uplink control or shared channel (PUXCH) transmissions are not received, leading to unnecessary power consumption and resource wastage.
Innovation Solution
Implementing a method where a relay/repeater unit (RU) receives a physical downlink control channel (PDCCH) message, relays it, and sends a negative acknowledgement (NACK) to the upstream node if the scheduled PUXCH transmission is not received, allowing for rescheduling of the transmission and optimizing resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional relay/repeat methods are used without rescheduling capability, then the system maintains simple operation, but resources are wasted and power consumption increases when PUXCH transmissions are not received
Solution Approach 1:
The RU implements a feedback mechanism by sending NACK messages to the upstream node when PUXCH transmissions are not received. This feedback enables the upstream node to reschedule transmissions, preventing wasted power consumption and resource allocation while maintaining reasonable system complexity through standardized feedback protocols.
Solution Approach 2:
The system performs preliminary rescheduling actions before transmission resources are fully allocated and consumed. By detecting missing PUXCH transmissions early and initiating rescheduling through NACK feedback, the system prevents wasteful power consumption and resource allocation, addressing the energy loss problem before it occurs.
2Loss of substance
If conventional relay/repeat methods are used without rescheduling capability, then the system maintains simple resource allocation, but transmission resources are wasted when PUXCH transmissions fail
Solution Approach 1:
The feedback mechanism through NACK messages enables dynamic resource management. When PUXCH transmissions fail, the RU notifies the upstream node, which can then reallocate transmission resources efficiently, preventing resource wastage while maintaining manageable resource management complexity through structured feedback loops.
Solution Approach 2:
The resource allocation system transitions from static to dynamic management through rescheduling capability. Resources are allocated adaptively based on actual transmission outcomes, allowing the system to optimize resource utilization by reallocating resources for rescheduled transmissions rather than leaving them wasted.
3Productivity
If the RU sends NACK messages and enables rescheduling, then resource allocation efficiency improves, but the communication protocol becomes more complex
Solution Approach 1:
The feedback mechanism using standardized NACK messages improves resource allocation efficiency by enabling proactive rescheduling. The protocol complexity increase is managed through standardized feedback formats and established rescheduling procedures, ensuring that the productivity gain from efficient resource allocation outweighs the moderate increase in protocol complexity.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a relay/repeater unit (RU) in an integrated access/fronthaul (IAF) network, receives, from an upstream node, a first physical downlink control channel (PDCCH) message associated with a scheduled physical uplink control or shared channel (PUXCH) transmission from a downstream node at a scheduled time, and relays or repeats the first PDCCH message to the downstream node. If the scheduled PUXCH transmission associated with the first PDCCH message is not received from the downstream node at the scheduled time, the RU sends a negative acknowledgement (NACK) message associated with the scheduled PUXCH transmission to the upstream node. The RU may also or alternatively generate a second PDCCH message associated with a rescheduled PUXCH transmission and send the second PDCCH message to the downstream node.