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Enhanced reservation signal for cellular communication in unlicensed spectrum

專利號(hào)
US11659402B2
公開日期
2023-05-23
申請人
Apple Inc.（US CA Cupertino）
發(fā)明人
Deepankar Bhattacharjee; Prateek Sharma; Farouk Belghoul; Dawei Zhang; Haitong Sun; Wei Zeng; Sreevalsan Vallath
IPC分類
H04W16/14; H04W72/04; H04W74/08; H04W84/12; H04W24/04; H04W72/0446
技術(shù)領(lǐng)域
unlicensed,cellular,lbt,ue,laa,may,fi,wi,station,in
地域： CA CA Cupertino

摘要

This disclosure relates to providing a reservation signal for cellular communication in unlicensed spectrum. A cellular base station may perform a listen-before-talk procedure on an unlicensed frequency channel. The cellular base station may transmit a reservation signal on the unlicensed frequency channel after successfully performing the listen-before-talk procedure. The cellular base station may perform carrier sensing on the unlicensed frequency channel at least once during the duration of the reservation signal. The cellular base station may perform cellular communication on the unlicensed frequency channel after ceasing transmitting the reservation signal.

說明書

Note that (e.g., depending on the applicable standard version and/or implementation choices), LAA may be used for downlink communication and/or uplink communication. For example, according to some embodiments, LAA release 13 may include standard specification details for using a SCell for downlink transmissions, while LAA release 14 may include standard specification details for using a SCell for both downlink and uplink transmissions. Other versions having similar or different supported features are also possible.

FIG. 7 shows an example of possible LAA control and data scheduling in an example Release 13 scenario 700. As shown, an eNB may communicate with a wireless device using three CCs in the example scenario of FIG. 7. The CCs may include a Pcell and one Scell that operate in licensed LTE spectrum, as well as one LAA Scell that operates in unlicensed 5 GHz spectrum. The eNB may make use of an LBT procedure and (e.g., if needed) a reservation signal prior to performing 1-10 μs of communication on the LAA Scell. A further LBT procedure may again be performed prior to performing additional downlink communication on the LAA Scell.

權(quán)利要求

1
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