Timing advance in implicitly updating L1 / L2 mobility
By maintaining timing advance (TA) based on the reception time difference derived on the set of deactivated cells in the 5G NR system, the problem of new cell activation delay is solved and the efficiency of inter-cell mobility is improved.
CN119654938APending Publication Date: 2025-03-18QUALCOMM INC
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Patent Information
- Application Number
- CN202280098418.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-05
- Publication Date
- 2025-03-18
AI Technical Summary
Technical Problem
The prior art is difficult to effectively reduce the activation delay of new cells in 5G NR systems, affecting the delay and efficiency of L1/L2 cell mobility.
Method used
By maintaining a timing advance (TA) on a set of deactivated cells, the user equipment (UE) can apply the TA associated with the cell before or when the cell is activated, skipping request/receiving the TA update command. This TA is derived from the reception time difference between the active cell and the set of deactivated cells.
Benefits of technology
This method effectively reduces the delay of new cell activation, improves the delay and efficiency of L1/L2 cell mobility, and does not need to increase signaling or reporting between the UE and the base station.
✦ Generated by Eureka AI based on patent content.
Abstract
Aspects presented herein may improve latency and efficiency of inter-cell mobility L1 / L2 by providing improved TA management for UEs. In one aspect, a UE derives a TA for a set of deactivated cells based on an Rx time difference between an active cell and the set of deactivated cells. The UE maintains the TA for the set of deactivated cells prior to activation of the set of deactivated cells. The UE applies the TA to the set of deactivated cells or to an initial Tx destined for the set of deactivated cells in response to the activation of the set of deactivated cells. The set of deactivated cells may correspond to a deactivated cell or a deactivated TAG that includes a plurality of deactivated cells.
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