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Decoupled downlink reception and uplink reception in a mixed licensed carrier and unlicensed carrier wireless communication system

專利號(hào)
US10219296B2
公開日期
2019-02-26
申請(qǐng)人
Telefonaktiebolaget LM Ericsson (publ)(SE Stockholm)
發(fā)明人
Gabor Fodor; Muhammad Kazmi
IPC分類
H04W72/14; H04W16/14; H04W72/12; H04W84/04
技術(shù)領(lǐng)域
uplink,wireless,lpn,downlink,hpn,carrier,device,resources,in,f2
地域: Stockholm

摘要

Systems and methods related to Downlink-Uplink Decoupling (DUDe) in mixed licensed and unlicensed carrier wireless system are disclosed. In some embodiments, a method of operating a wireless device comprises communicating with a first radio node that operates on a licensed carrier to obtain a set of time resources in which the wireless device is expected to be scheduled for uplink data transmission on the licensed carrier and/or a set of time resources in which the wireless device is expected to receive downlink control transmission on the licensed carrier. The method further comprises communicating with a second radio node that operates on an unlicensed carrier to obtain, based on the set(s) of time resources for the licensed carrier, a set of time resources in which the wireless device will not be scheduled for downlink reception on the unlicensed carrier and receiving a downlink transmission from the second radio node accordingly.

說明書

In this regard, FIG. 1 illustrates one example of a wireless communications system 10 in which embodiments of the present disclosure may be implemented. As an example, the wireless communications system 10 may be a cellular communications system. As illustrated, the wireless communications system 10 includes a heterogeneous deployment of a radio access network, which includes a number of radio access nodes. These radio access nodes are types of radio nodes. In this example, the radio access nodes include a High Power Node (HPN) 12-1 and a Low Power Node (LPN) 12-2. The HPN 12-1 and the LPN 12-2. Thus, the HPN 12-1 may also be referred to herein as a high power radio access node, high power base station, or a high power radio node, and the LPN 12-2 may also be referred to herein as a low power radio access node, a low power base station, or a low power radio node. In this example, the HPN 12-1 operates on a first carrier frequency (F1) that is in a licensed frequency band, and the LPN 12-2 operates on a second carrier frequency (F2) that is in an unlicensed frequency band. Thus, the first carrier frequency (F1) is also referred to herein as a licensed carrier, and the second carrier frequency (F2) is also referred to herein as an unlicensed carrier. In some embodiments, the second carrier frequency (F2) is a millimeter wave (mmWave) frequency (e.g., >1 gigahertz (GHz)) and, even more preferably, is greater than or equal to 6 GHz. Further, in some embodiments, the wireless communications system 10 is a 5G or similar cellular communications system utilizing beamforming, particularly, but not limited to, the uplink and downlink for the LPN 12-2. Also note that the HPN 12-1 and the LPN 12-2 may not be controlled by the same network operator.

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