Repeater Bandwidth Part Switching for 5G Power Optimization
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Solution Overview
Problem
The framework for bandwidth part switching in repeaters for 5G NR wireless communication systems is undefined, particularly in virtualized radio access networks, leading to unclear bandwidth part switching delays, which affects power consumption and efficiency during varying data traffic conditions.
Innovation Solution
A method and system for a repeater to receive commands for bandwidth part switching over a wireless fronthaul link, repeating these commands to user equipment and synchronizing its own bandwidth part switching with a schedule responsive to the user equipment's switching schedule, determining switching delays based on subcarrier spacings, and performing switching over component carriers to manage bandwidth part changes efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a large channel bandwidth is used to achieve higher data rates, then data rate is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic bandwidth part switching that allows the repeater to adapt its operating bandwidth according to real-time traffic conditions. The repeater can switch between different bandwidth parts (e.g., from a larger bandwidth part for high data rates to a smaller bandwidth part for low data rates), making the system dynamically adjustable rather than fixed, thus resolving the contradiction between maintaining high data rate capability and reducing actual power consumption during low-traffic periods
Solution Approach 2:
The patent changes the operating parameters of the repeater by switching between different bandwidth parts with different numerical values. The network can configure multiple bandwidth parts with different bandwidth values, and the repeater switches between them by changing its operating parameters, thereby adapting to varying traffic demands and optimizing the balance between data rate and power consumption
2Use of energy by moving object
If bandwidth part switching is implemented in repeaters, then power efficiency is improved, but switching delay and coordination complexity increase
Solution Approach 1:
The patent implements preliminary action by having the network pre-configure multiple bandwidth parts and their switching schedules before actual switching is needed. The network can provide advance notification of upcoming bandwidth part switches, allowing the repeater to prepare for switching in advance rather than reacting to sudden changes, thus reducing actual switching delay and improving coordination efficiency
3Use of energy by moving object
If bandwidth part switching is implemented in repeaters, then power efficiency is improved, but system complexity increases
Solution Approach 1:
The patent introduces the network as an intermediary that manages and coordinates bandwidth part switching for repeaters. Instead of making the repeater independently complex, the network acts as a central controller that provides switching commands and schedules to multiple repeaters, simplifying individual repeater design while enabling coordinated system-wide bandwidth adaptation. The network mediates between multiple repeaters and UEs, handling the complexity of synchronization and coordination centrally
Data Source
AI summary
A repeater BWP switching schedule is provided for a repeater that is responsive to a user equipment BWP switching schedule. Should the repeater support a plurality of active user equipments, the user equipment BWP switching schedule is a superset of the BWP switching schedule for each individual user equipment. The repeater BWP switching schedule may thus be more granular than the UE BWP switching schedule.