Supplementary Downlink ( SDL ) and Supplementary Uplink ( SUL ) are modes that allow only downlink or uplink in those bands . SDL and SUL are meant to provide additional capacity. In practice, industry looks at 5G spectrum in terms of low-band (600-700 kHz), mid-band (3-5 GHz) and high-band (26-100 GHz).
Read moreWhat is supplementary uplink?
In case of Supplementary Uplink, the UE is configured with 2 UL carriers for one DL carrier of the same cell , and uplink transmissions on those two UL carriers are controlled by the network to avoid overlapping PUSCH/PUCCH transmissions in time.28 Nis 2020
Read moreWhat is supplementary uplink in 5G?
Supplementary uplink (SUL) is introduced in 3GPP Rel-15 to extend the uplink coverage by providing a supplementary uplink (usually in sub-3 GHz band) . With SUL, a DL frequency band (NR frequency band) and two uplink frequency bands (one NR frequency band and one SUL frequency band) are configured in the same cell.
Read moreWhat is supplemental downlink?
Supplemental Downlink (SDL) has been enabled inThird Generation partnership Project (3GPP) Release 9 as part of the evolution of High Speed Downlink Packet Access (HSDPA) . While the serving carrier (cell) for an HSDPA UE is part of paired spectrum, the SDL carrier is part of unpaired spectrum in a different band.
Read moreWhat is paired spectrum in 5G?
Radio spectrum is often organised (and sold) as paired spectrum – a block of spectrum in a lower frequency band and an associated block of spectrum in an upper frequency band . This arrangement of frequency bands with one band for the uplink and one band for the downlink is called paired spectrum.
Read moreDoes 5G have carrier aggregation?
5G NR supports carrier aggregation with 16 CCs . Carrier aggregation of LTE and 5G NR carriers is also possible which is known as Dual Connectivity (DC).
Read moreWhat is paired and unpaired spectrum in 5G?
In unpaired spectrum, asymmetry may be provided through the use of unequal duty cycles in the time domain for uplink and downlink. In paired spectrum, asymmetry is also possible via the deployment of unequal bandwidths for uplink and downlink.22 Tem 2011
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