Random access on enhanced secondary uplink cells

By introducing a unified framework of enhanced secondary uplink cells into the wireless communication system, the problem of low communication efficiency of UE in uplink-only cells in the existing technology is solved, and more efficient communication scheduling and feedback are achieved, thereby improving system performance.

CN121890218APending Publication Date: 2026-04-17QUALCOMM INC
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Patent Information

Application Number
CN202480060394.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-09-27
Filing Date
2024-08-26
Publication Date
2026-04-17

AI Technical Summary

Technical Problem

The lack of a unified framework in existing wireless communication systems for secondary uplink cells leads to inefficiencies in user equipment (UE) during random access and uplink communication, especially in uplink-only cells without downlink carriers, where communication scheduling and feedback processes are not optimized.

Method used

It provides a unified framework for enhanced secondary uplink (eSUL) cells, which supports flexible communication between UEs and traditional cells through indication and scheduling mechanisms between UEs and network entities. This includes uplink and downlink communication, as well as random access channel communication, and optimizes the communication process by utilizing cross-carrier scheduling and multi-cell scheduling.

Benefits of technology

It improves the communication efficiency and flexibility of UEs in eSUL cells, optimizes communication scheduling and feedback processes, and enhances the overall performance of the system.

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Abstract

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a first indication of a first cell associated with a first uplink carrier and a first downlink carrier and a second cell associated with a second uplink carrier, wherein the second cell includes an uplink-only cell. The UE may receive a second indication of subsequent communications to be performed via a first uplink carrier of the first cell, a second uplink carrier of the second cell, or both via a first downlink carrier of the first cell or via a second downlink carrier associated with the third cell. The UE may perform a subsequent communication according to the second indication, wherein the subsequent communication includes at least one of an access communication, an uplink communication, or both.
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