Initial Active BWP Selection for Lower-Power Random 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 can be inefficient and wasteful, especially during call setup or handover scenarios.
Innovation Solution
Early identification and configuration of initial active BWPs smaller than the full available BWP, facilitated through the network entity providing parameters in the RACH procedure, allowing the UE to select and communicate using these smaller BWPs, thereby conserving energy and signaling resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full bandwidth is used during initial active bandwidth parts, then communication coverage and signal strength are improved, but power consumption and signaling resource usage increase excessively
Solution Approach 1:
The patent divides the full available bandwidth into multiple bandwidth parts (BWPs), allowing the UE to operate on a smaller initial active BWP rather than the entire bandwidth. This segmentation enables the system to maintain adequate communication coverage on a reduced bandwidth, thereby lowering power consumption while preserving essential connectivity during initial access and handover scenarios.
Solution Approach 2:
The patent dynamically changes the bandwidth parameter by configuring different initial active BWPs for different UEs or different access scenarios. By adjusting the active bandwidth from the full available bandwidth to a smaller configured BWP, the system optimizes the trade-off between communication reliability and power consumption based on actual service requirements.
2Reliability
If full bandwidth is used during initial active bandwidth parts, then signal quality is maintained, but signaling resource consumption increases
Solution Approach 1:
By segmenting the full bandwidth into multiple BWPs and assigning UEs to appropriate initial active BWPs, the patent reduces the total signaling resources required for initial access and handover procedures. Each BWP can be independently configured and managed, allowing more efficient utilization of signaling resources while maintaining signal quality on the assigned bandwidth portion.
3Use of energy by moving object
If smaller initial active BWPs are used, then power consumption and signaling resources are conserved, but communication coverage and signal strength may be reduced
Solution Approach 1:
The patent applies preliminary action by configuring the initial active BWP parameters in advance through RACH procedure signaling from the network to the UE. This allows the UE to be pre-configured with appropriate initial active BWP settings before actual data transmission begins, ensuring that the UE uses an optimized bandwidth that balances power consumption with adequate communication coverage for the specific service scenario.
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.