複数のアンカーチャネル上の狭帯域物理ブロードキャストチャネル設計

Japanese Patent JP7245246

B2

Techniques and apparatuses described herein facilitate narrowband communication within the unlicensed frequency spectrum by simultaneously transmitting (e.g., in adjacent channels) a plurality of anchor channels. For example, a base station may simultaneously transmit at least three anchor channels of 180 kHz each so that the 500 kHz minimum bandwidth requirement is satisfied. Furthermore, the techniques and apparatuses described herein provide discovery reference signal (DRS) structures to cause the different types of DRS to be repeated and/or transmitted on different anchor channels, which improves frequency diversity. Also, a synchronization signal of the anchor channels may be used to indicate a configuration of the anchor channels. Thus, synchronization in the NB-IoT-unlicensed (NB-IoT-u) spectrum is enabled, and efficiency is improved over synchronization using a single anchor channel.

Liu, Ji-hao
Yella Marri, Srinivas
Cadous, Thamel

JP2020531059A

March 23, 2023

December 05, 2018

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QUALCOMM INCORPORATED

H04W16/14; H04W48/10; H04W56/00; H04W72/0453; H04W72/0457

Nokia Networks,In-band design considerations[online], 3GPP TSG RAN WG1 adhoc_LTE_NB-IoT_1601 R1-160173,インターネット,2016年01月11日
Samsung,New WID on Further enhancement of NB-IoT and eMTC[online],3GPP TSG RAN #75 RP-170171,Internet,2017年02月28日
Ericsson,Motivation for work item on NB-IoT operation in unlicensed spectrum[online],3GPP TSG RAN #75 RP-170510,Internet,2017年02月28日

Patent Attorney Corporation Suzue Patent General Office
Masatoshi Kurata
Moriso Iseki
Takashi Okada

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