Mobile terminal terminated small data transmission

By selecting RA resources and configuring specific RACH resources based on MO-SDT conditions during the MT-SDT process, the problem of unclear RA resource configuration is solved, efficient uplink data transmission is achieved, and latency and signaling overhead are reduced.

CN120660435APending Publication Date: 2025-09-16QUALCOMM INC
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Patent Information

Application Number
CN202380093470.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-02-15
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

In the mobile terminated small data transmission (MT-SDT) process of existing wireless communication systems, there is an unclear RA resource configuration, which leads to low resource utilization, increased latency and excessive signaling overhead, especially the inability to schedule uplink data in time after it arrives.

Method used

By selecting RA resources based on whether the condition set associated with mobile-initiated small data transmission (MO-SDT) is met during the MT-SDT process, and configuring RACH resources specific to MT-SDT, an indication of the presence of uplink data is provided to ensure efficient data transmission in the RRC inactive state.

Benefits of technology

It improves the efficiency of RA resource configuration, reduces ambiguity, reduces latency and signaling overhead, and enables efficient uplink data transmission in RRC inactive state.

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Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive a configuration indicating at least one of: a first random access (RA) resource; or a second RA resource configured for small data transmission (MO-SDT) initiated by a mobile terminal. The UE may receive, from the paging message, an indication of a mobile terminal terminated SDT (MT-SDT). The UE may select an MT-SDT RA channel (RACH) resource for MT-SDT RA channel transmission according to the configuration, wherein selecting the RA resource is based at least in part on whether a set of conditions associated with MO-SDT reception is satisfied. The UE may transmit the MT-SDT RACH transmission on the selected RA resource. Numerous other aspects are described.
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