Initial Active BWP Configuration for Lower-Power RACH Access
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Solution Overview
Problem
Existing wireless communication systems consume excessive power and signaling resources due to the use of full bandwidth during initial active bandwidth parts (BWPs), which are not efficiently managed, especially in scenarios where narrower BWPs are suitable for ongoing communication needs.
Innovation Solution
Early identification and configuration of initial active BWPs smaller than full BWPs during the random access channel (RACH) procedure, allowing UEs to conserve energy and signaling resources by using narrower frequency bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full bandwidth is used during initial active bandwidth parts, then communication coverage and signal quality are improved, but power consumption and signaling overhead increase
Solution Approach 1:
The patent segments the full bandwidth into multiple bandwidth parts (BWPs), allowing the UE to activate only a subset of BWPs based on communication needs. This segmentation enables the system to maintain full bandwidth capability when needed while operating on reduced bandwidth during normal communication, thereby resolving the contradiction between coverage quality and power consumption.
Solution Approach 2:
The patent implements dynamic BWP activation and deactivation mechanisms, where the network can configure and switch between different BWP sets based on traffic conditions and channel quality. This dynamic adjustment allows the system to adapt bandwidth usage in real-time, maintaining high signal quality when necessary while reducing power consumption during stable communication phases.
2Reliability
If full bandwidth is used during initial active bandwidth parts, then communication reliability is improved, but signaling overhead increases
Solution Approach 1:
By segmenting the bandwidth configuration into multiple BWPs with different activation states, the patent reduces the signaling overhead required to manage bandwidth resources. Instead of managing a single full-bandwidth configuration, the system efficiently manages selective BWP activation, thereby reducing the information overhead while maintaining communication reliability through appropriate BWP selection.
3Use of energy by moving object
If narrower bandwidth parts are used during initial active bandwidth parts, then power consumption is reduced, but communication coverage decreases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple BWP sets with different characteristics (e.g., different bandwidth sizes, frequency locations) before actual communication begins. During initial access and connection setup, the network can select and activate the most appropriate BWP set based on current channel conditions and UE capabilities, ensuring adequate coverage while minimizing power consumption from the outset.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information that indicates one or more parameters that correspond to one or more initial active bandwidth parts (BWPs), each initial active BWP being smaller than a full available BWP. The UE may select an initial active BWP from the one or more initial active BWPs. The UE may transmit a random access channel message based at least in part on a first parameter, of the one or more parameters, that corresponds to the selected initial active BWP. Numerous other aspects are described.