Bandwidth Part Switching Without SPS Reactivation Signaling
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Solution Overview
Problem
Existing wireless communication systems face increased overhead and network-side power consumption due to the need for frequent signaling to deactivate and activate semi-persistent scheduling (SPS) resources during temporary bandwidth part switching.
Innovation Solution
The method involves delaying the deactivation of SPS resources during temporary bandwidth part switching without receiving a separate DCI message, and resuming communications upon returning to the original bandwidth part without an additional activation message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network entity transmits DCI messages to deactivate and activate semi-persistent resources during temporary bandwidth part switching, then the semi-persistent resources can be properly managed, but the signaling overhead increases
Solution Approach 1:
The patent extracts the deactivation/activation signaling from the temporary bandwidth part switching process. Instead of sending separate DCI messages to deactivate and reactivate semi-persistent resources during BWP switching, the system maintains the resources active implicitly throughout the temporary switch, removing the unnecessary signaling overhead while preserving proper resource management
Solution Approach 2:
The patent makes the semi-persistent resources universal across bandwidth part transitions. The same semi-persistent resource configuration remains valid across different BWPs during temporary switching, allowing the resources to serve multiple functions (both during active BWP and during temporary switched BWP) without requiring separate activation/deactivation signaling
2Reliability
If the network entity transmits DCI messages to deactivate and activate semi-persistent resources during temporary bandwidth part switching, then the semi-persistent resources can be properly managed, but the network-side power consumption increases
Solution Approach 1:
The patent removes the power-consuming DCI transmission operations for deactivation and activation of semi-persistent resources during temporary BWP switching. By eliminating these signaling transmissions, the network entity reduces its power consumption while maintaining proper resource management through implicit resource validity across BWP transitions
3Use of energy by stationary object
If the UE switches to a second bandwidth part for a temporary duration, then network-side power consumption is reduced, but the semi-persistent resource communications are interrupted
Solution Approach 1:
The patent prepares the semi-persistent resources in advance to remain valid across temporary BWP switching operations. The resources are configured to be preemptively maintained active before the switch occurs, ensuring that communication continuity is preserved when the UE returns to the original BWP, eliminating interruptions without sacrificing power savings
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, via a first bandwidth part, a first downlink control information message activating a semi-persistent resource for the first bandwidth part. The UE may switching to a second bandwidth part from the first bandwidth part for a temporary duration. the UE may delay, based on switching to the second bandwidth part, communications via the semi-persistent resource on the first bandwidth part for the temporary duration without receiving a second downlink control information message via the first bandwidth part that deactivates or releases the semi-persistent resource.