| 摘要 |
<p>The present invention describes a method, a first and second network nodes and system for sending data to a new network node in a mobile communications network. In terms of a WCDMA network, when a handover is triggered, data blocks have to be sent to a new Node B from the RNC instead of the old Node B.</p><p><Paragraphs id="pa02" num="0002" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">Therefore, the present invention describes a solution for estimating which data blocks are sent to the new Node B. In the method, a timer is set for each one or more data blocks to be sent to a mobile terminal. When a handover is triggered, the RNC estimates based on the timer values which data blocks have already been transmitted via the present Node B to the mobile terminal. Only data blocks, which are estimated as not being sent to the mobile terminal, are transmitted from the RNC to the new Node B.
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