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Conditional handovers for wireless relay networks

專利號(hào)
US11997551B2
公開日期
2024-05-28
申請(qǐng)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

After establishing an RRC connection to wireless access node 22-1, e.g., to Donor 1, the Child Node 30 may be provisioned with a configuration with a secondary cell served by the wireless access node 22-2 and IAB-node 24B. Following the configuration, the Child Node 30 may use the multiple paths for transmitting/receiving signaling bearer (and possibly data bearers). In the present example embodiment and mode, at least one of the parent nodes of the Child node 30 may send some of the aforementioned notifications representing the radio condition of its upstream radio link. That is, either IAB-node 24A or IAB-node 24B may send such notifications, as and when the radio condition(s) occur. For example, similar to the previously disclosed embodiments, when detecting a radio link failure (RLF) on the upstream radio link of IAB-node 24A, the IAB-node 24A may send the Upstream RLF notification to its child nodes including the Child Node 30. In this case, the Child Node 30 may attempt to report this event to at least one of the serving donors using a path not affected by the RLF. In the scenario shown in the FIG. 16, the Child Node 30 may use the path SRB_s to send the report to the wireless access node 22-2 through the IAB-node 24B. In some example configurations, the report may be also conveyed to the wireless access node 22-1, e.g., to Donor 1, which may decide to reconfigure updated redundant connections to the Child Node 30.

權(quán)利要求

1
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