Handover process
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United States of America Patent
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Jun 1, 2021
Grant Date -
Apr 22, 2021
app pub date -
May 3, 2018
filing date -
May 12, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
An embodiment of the invention relates to a method of carrying out a handover process. After receiving a handover message (HOM(13)) that indicates the initiation of the handover process with respect to a moving node (13), a handover control node (20) addresses its next token (T(21)) to the moving node (13) and not to its formerly allocated downstream node (21) in its original wireless token ring system (2). In case that the moving node (13) receives said token (T(21)) and sends thereafter an acknowledgement to the handover control node (20) and an own token (T) to its allocated downstream node (21) in the enlarged wireless token ring system (2), the handover process is deemed to be completed and the moving node (13) forms the newly allocated downstream node to the handover control node (20) in the enlarged wireless token ring system (2). In case that the handover control node (20) does not receive the acknowledgement in a given period of time, the handover control node (20) sends a replacement token (RT) to the allocated downstream node (21) of the moving node (13), the replacement token (RT) replacing the presumably missing token of the moving node (13) and allowing the token ring communication to proceed.
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