Bandwidth Part Transition for Latency and Coverage Trade-off
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G cellular network base stations face challenges in dynamically adjusting bandwidth allocation to balance latency and coverage, as well as battery life, particularly when dealing with varying communication traffic and user equipment (UE) locations.
Innovation Solution
The method involves defining and transitioning user equipment between multiple non-overlapping bandwidth parts with different subcarrier spacings and bandwidths, dynamically adjusting based on communication traffic, allowing for concurrent use of multiple bandwidth parts to optimize latency and coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a higher sub-carrier spacing (SCS) is used, then latency is reduced, but coverage region is limited
Solution Approach 1:
The patent divides the available bandwidth into multiple non-overlapping bandwidth parts (BWPs), each configured with different sub-carrier spacings. This segmentation allows the system to simultaneously support both high SCS (for low latency) and low SCS (for extended coverage) configurations within the same cell, resolving the contradiction between latency reduction and coverage expansion.
Solution Approach 2:
The system dynamically transitions user equipment between different bandwidth parts based on real-time conditions such as UE location, traffic demands, and channel characteristics. This dynamic adaptation enables the network to optimize the trade-off between latency and coverage for each UE individually, rather than being constrained to a fixed SCS configuration for the entire cell.
2Productivity
If wider bandwidth is used for communication, then data rate is improved, but battery life of UE deteriorates
Solution Approach 1:
Different bandwidth parts are assigned with different bandwidth widths tailored to specific UE requirements and channel conditions. UEs experiencing good channel conditions can be allocated wider BWPs for high data rates, while UEs in challenging conditions or with battery constraints can be assigned narrower BWPs, optimizing the local quality of resource allocation for each UE.
Solution Approach 2:
The system dynamically adjusts the bandwidth allocation by transitioning UEs between bandwidth parts with different bandwidth widths based on real-time conditions. This allows the data rate and energy consumption to be dynamically optimized, enabling the network to switch between power-efficient narrow bandwidth modes and high-speed wide bandwidth modes as conditions change.
3Adaptability or versatility
If multiple bandwidth parts with different configurations are maintained, then adaptability to different conditions is improved, but device complexity increases
Solution Approach 1:
The available spectrum is segmented into multiple non-overlapping bandwidth parts, each with standardized configurations for sub-carrier spacing and bandwidth. This segmentation approach enables systematic management of multiple configurations through structured signaling mechanisms, making the complexity tractable while maintaining high adaptability to diverse channel conditions and UE requirements.
Data Source
AI summary
Various arrangements for transitioning the bandwidth allocation of a cellular network, such as at a base station, are presented. Bandwidth parts may be defined for communication with the cellular network, such as on a per-base station basis. At a given time, two of these bandwidth parts may be actively used for communication by different UE for communication with the base station. A determination to adjust a bandwidth allocation may be made. A series of transitions may be performed to migrate from the first two of these bandwidth parts to the second two of the bandwidth parts such that interference does not occur.