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

專利號
US10219296B2
公開日期
2019-02-26
申請人
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

With respect to power limitations, UEs can be subject to power limitations to comply with requirements on signal quality and Out-Of-Band (OOB) emissions. These power limitations can be set by setting the Maximum Power Reduction (MPR), Additional MPR (AMPR), the so called DeltaTc, and other parameters known to those skilled in the art. In particular, since Release (Rel) 10 of the Third Generation Partnership Project (3GPP) standards suite, the Power Management MPR (P-MPR) allows a UE to reduce its maximum output power when other constraints are present. For example, multi-Radio Access Technology (RAT) terminals may have to limit the Long Term Evolution (LTE) transmission power if transmissions on another RAT are taking place simultaneously. Such power restrictions may arise, for example, from regulations on a Specific Absorption Rate (SAR) of radio energy into a user's body of OOB emissions requirements that may be affected by the Inter-Modulation (IM) products of the simultaneous radio transmissions. The P-MPR is not aggregated with MPR and A-MPR, since any reduction in a UE's maximum output power for the latter factors helps to satisfy the requirements that would have necessitated P-MPR. DeltaTc is a 1.5 dB reduction in the lower limit of the maximum output power range when the signal is within 4 megahertz (MHz) of the channel edge.

With respect to UE power capabilities, regular handheld UEs may have maximum transmit power capabilities that are different than that of low-energy sensors that send measurement data to a gateway data acquisition node in the proximity of the sensor.

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