Initial Downlink BWP Selection for Efficient Random Access
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Solution Overview
Problem
The determination of an initial active downlink BWP for terminal devices based on RMSI CORESET results in low communication efficiency due to uniform BWP configuration across devices with varying characteristics, leading to inefficient random access procedures.
Innovation Solution
A communication method and apparatus that allows terminal devices to determine a first initial active downlink BWP according to configuration information, enabling each device to select an BWP that meets its specific requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the initial active downlink BWP is determined uniformly based on RMSI CORESET for all terminal devices, then the configuration process is simple and consistent, but communication efficiency deteriorates due to inability to account for different terminal device characteristics
Solution Approach 1:
The patent segments the initial active downlink BWP determination process by introducing multiple BWPs with different characteristics (e.g., first BWP for coverage enhancement, second BWP for normal operation). Terminal devices can be divided into different groups or select different BWPs based on their characteristics, thereby resolving the contradiction between configuration simplicity and communication efficiency by creating a structured multi-BWP framework that maintains ease of selection while improving performance
Solution Approach 2:
The patent implements dynamic BWP determination by allowing terminal devices to select from multiple configured BWPs based on their specific characteristics, device capabilities, or network conditions. This dynamic selection mechanism enables the system to adapt to different terminal requirements while maintaining a relatively simple configuration process, thus resolving the contradiction between simplicity and efficiency
2Ease of manufacture
If a single initial active downlink BWP is configured for all terminal devices, then the network configuration is simplified, but adaptability to different terminal device characteristics deteriorates
Solution Approach 1:
The patent applies local quality by configuring different BWP characteristics for different terminal device types or scenarios. Each BWP can have optimized parameters (bandwidth, subcarrier spacing, cyclic prefix length) tailored to specific terminal characteristics or service requirements, allowing the network to maintain simple overall configuration while providing locally optimized settings for different device groups
Solution Approach 2:
The patent creates a universal BWP configuration framework where multiple BWPs are configured with different characteristics to serve multiple terminal types and scenarios simultaneously. This multi-functional approach allows a single configuration set to accommodate diverse terminal characteristics, resolving the contradiction between configuration simplicity and adaptability
3Device complexity
If terminal devices use the same initial active downlink BWP based on RMSI CORESET, then resource allocation is uniform and simple, but system capacity deteriorates due to inability to support diverse terminal requirements
Solution Approach 1:
The patent segments the resource allocation by creating multiple initial active downlink BWPs with different resource characteristics. This segmentation allows the system to allocate resources more efficiently across different terminal types and service requirements, increasing overall system capacity while maintaining relatively simple allocation rules within each BWP group
Solution Approach 2:
The patent adds another dimension to resource allocation by introducing multiple BWPs as an additional resource dimension. Instead of only allocating resources within a single BWP, the system can allocate terminals to different BWPs based on their requirements, effectively increasing system capacity without significantly complicating the allocation process
Data Source
AI summary
Embodiments of the present disclosure provide a communication method and apparatus. The method includes: acquiring configuration information of at least one initial active downlink bandwidth part BWP; and determining a first initial active downlink BWP corresponding to a terminal device according to the configuration information of the at least one initial active downlink BWP. A terminal device determines a first initial active downlink BWP corresponding to the terminal device according to configuration information of at least one initial active downlink BWP, so as to ensure that each terminal device selects an initial active downlink BWP according to its actual requirements, thereby avoiding a problem of low communication efficiency caused by the same initial active downlink BWP of each terminal device.