BWP Partition With Scheduling Gaps for Frequency Hopping
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, lack efficient mechanisms for scheduling frequency-hopping transmissions that accommodate radio frequency retuning at user equipment (UE), leading to inefficiencies in bandwidth utilization and communication performance.
Innovation Solution
The implementation of bandwidth parts (BWP) and sub-BWPs within an operating bandwidth, with scheduled gaps for radio frequency retuning, allowing for seamless frequency-hopping transmissions between sub-BWPs to accommodate retuning at the UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency-hopping transmissions are scheduled between different frequency locations, then communication diversity and spectral efficiency are improved, but radio frequency retuning time at the UE is insufficient leading to transmission failures
Solution Approach 1:
The patent applies preliminary action by pre-configuring the UE with multiple candidate BWPs and pre-calculating the required retuning time before frequency hopping occurs. The base station schedules transmissions based on pre-determined retuning requirements, ensuring that the UE has adequate time to retune its radio frequency components before each frequency hop, thereby preventing transmission failures while maintaining spectral efficiency.
2Adaptability or versatility
If the operating bandwidth is divided into multiple BWPs for flexible scheduling, then scheduling flexibility is improved, but the complexity of managing frequency hops and retuning gaps increases
Solution Approach 1:
The patent applies segmentation by dividing the operating bandwidth into multiple BWPs, each with specific frequency locations and bandwidths. This segmentation allows the base station to schedule frequency-hopping transmissions between discrete BWP segments, making the complex retuning process more manageable. Each BWP acts as an independent scheduling unit, reducing the overall scheduling complexity while maintaining flexibility.
Solution Approach 2:
The patent applies dynamics by enabling dynamic switching between different BWPs based on real-time channel conditions and retuning requirements. The base station can dynamically adjust which BWP is active and when frequency hops occur, optimizing the balance between scheduling flexibility and retuning time. This dynamic approach allows the system to adapt to changing conditions without being constrained by fixed scheduling patterns.
3Reliability
If retuning time is accounted for in the scheduling gap, then transmission reliability is improved, but the effective bandwidth utilization time is reduced
Solution Approach 1:
The patent applies preliminary action by pre-determining the exact retuning time required for each frequency hop and incorporating this into the scheduling gap calculation. By knowing the retuning requirements in advance, the base station can optimize the scheduling gap to be just long enough for retuning, minimizing unnecessary time loss while ensuring reliable transmissions. This prevents both transmission failures and excessive idle time.
Data Source
AI summary
Aspects of the disclosure relate to defining a bandwidth part (BWP) within an operating bandwidth, and sub-BWPs within the BWP, where the sub-BWPs can be used for scheduling frequency-hopping transmissions. As one example, a base station may schedule frequency-hopping transmissions using two or more sub-BWPs. The base station may configure a portion of an operating bandwidth to serve as a BWP used for communicating with a UE over the wireless communication network, define two or more sub-BWPs at different frequency locations within the BWP, each sub-BWP including resource blocks provided in the BWP, and provide a scheduling gap when a frequency hop is scheduled between two or more sub-BWPs at the UE, wherein the scheduling gap accommodates radio frequency retuning at the UE.