Dynamic Channel Bandwidth for Legacy Mobile Device Access
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Solution Overview
Problem
Legacy mobile devices struggle with channel bandwidth upgrades due to lack of software support or power saving features, leading to access failures and inefficient spectrum utilization in wireless communication systems.
Innovation Solution
A framework that uses information elements to differentiate between legacy and newer devices based on their channel bandwidth capabilities, allowing networks to dynamically assign bandwidth parts that match the maximum supported by each device, thereby optimizing power usage and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the RAN upgrades the channel bandwidth to a larger bandwidth, then the network capacity and spectrum efficiency are improved, but legacy mobile devices that cannot support the larger bandwidth will fail to access the cell
Solution Approach 1:
The patent segments the channel bandwidth into multiple bandwidth parts (BWPs), where each BWP corresponds to a specific bandwidth capability (e.g., 20 MHz, 40 MHz, 80 MHz). The network transmits different BWPs simultaneously, allowing legacy devices to access the 20 MHz BWP while newer devices can access wider BWPs. This segmentation resolves the contradiction by enabling both legacy and modern devices to coexist on the same cell.
Solution Approach 2:
The patent implements dynamic bandwidth part assignment where the network can switch between different BWP configurations based on device capability detection. When a legacy device is detected, the network dynamically assigns it to a narrower BWP; when a modern device is detected, it is assigned to a wider BWP. This dynamic adaptation allows the system to optimize for network capacity while maintaining compatibility with legacy devices.
2Use of energy by moving object
If legacy mobile devices stay on a smaller channel bandwidth to conserve power, then power consumption is reduced, but spectrum utilization efficiency deteriorates
Solution Approach 1:
The patent applies local quality by assigning different bandwidth parts to different devices based on their specific needs and capabilities. Legacy devices that prioritize power saving are assigned narrower BWPs (e.g., 20 MHz) that match their scanning capabilities, while devices that can support wider bandwidths are assigned accordingly. This localized optimization allows each device to operate at its optimal power efficiency point while the aggregate spectrum utilization is maximized across all devices.
Data Source
AI summary
Aspects of the subject matter described herein are directed towards indicating to a communications network the bandwidth capability data of a user equipment (mobile) device. This allows distinguishing between legacy user equipment that does not support larger bandwidths from newer user equipment that does. A network can thus limit the bandwidth via one of its supported bandwidth parts to a user equipment's bandwidth capability data, such as the maximum supported static bandwidth part of the legacy user equipment. At the same time, larger bandwidths can be assigned to user equipment devices capable of supporting larger bandwidths. Information elements can be used to communicate the bandwidth data from the user equipment to the network, e.g., during initial communications or as requested by the network. Once obtained, the bandwidth data of a user equipment device can be maintained by the network and forwarded to a target cells as part of cell handovers.