COMMUNICATIONS SYSTEM, MOBILE TERMINAL DEVICE, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Dec 6, 2021
filing date -
Dec 6, 2021
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status (Latency Note)
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Abstract
A U2N relay (110 #2) transmits a first sidelink discovery message containing base-station identification information of a base station (130) when the U2N relay (110 #2) is in communication range with the base station (130). When a U2U relay (110 #3) is in communication range with the U2N relay (110 #2) and not in communication range with the base station (130), the U2U relay (110 #3) receives the first sidelink discovery message and transmits a second sidelink discovery message containing mobile-terminal-device identification information of the U2N relay (110 #2) and base-station identification the information. When a remote UE (110 #1) is in communication range with the U2U relay (110 #3) and no in communication range with the base station (130) and the U2N relay (110 #2), the remote UE (110 #1) receives the second sidelink discovery message and establishes communication path to communicate with the base station (130) via the U2U relay (110 #3) and the U2N relay (110 #2).
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