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Conditional handovers for wireless relay networks

專利號
US11997551B2
公開日期
2024-05-28
申請人
SHARP KABUSHIKI KAISHA（JP Sakai）
發(fā)明人
Atsushi Ishii
IPC分類
H04W36/12; H04W36/00; H04W36/30
技術(shù)領(lǐng)域
node,iab,message,wireless,rlf,handover,radio,child,access,may
地域： Osaka

摘要

A wireless node that communicates over a radio interface with a wireless access node of a radio access network (RAN) through an Integrated Access and Backhaul (IAB) node, the wireless node comprising: receiver circuitry configured to: receive from the wireless access node a reconfiguration message comprising a conditional handover configuration, the conditional handover configuration comprising a triggering condition and a configuration of a candidate target cell, the triggering condition comprising at least one threshold value; receive from the IAB node a notification message comprising information representing a radio condition measured on a path between the IAB node and the wireless access node, and; processor circuitry configured to perform, based on the triggering condition and the information, a handover using the configuration of the candidate target cell.

說明書

While Node A is trying to find a new suitable IAB-capable serving cell, the child IAB nodes (Child node 1 and Child node 2) and/or UEs (UE1 and UE2) may still be in connected mode with Node A. If Node A successfully recovers from the RLF before expiration of a pre-configured (or network-configured) period of time, the child nodes and/or the UEs may not be aware of the RLF. However, in the scenario where Node A fails or has failed to recover from the RLF in a timely manner (e.g., before expiration of a pre-configured/network-configured period of time), not only may these child nodes/UEs suffer discontinuity of service, but also all the nodes/UEs in the downstream may also suffer discontinuity of service.

The present embodiments disclose systems, methods, and device where an IAB-node may inform connected nodes (child nodes) or UEs, of the upstream radio conditions. In some embodiments, the upstream radio condition information may enable the child nodes or UEs to decide to stay connected with the IAB-node or to look for another node to connect to.

權(quán)利要求

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