US 11,737,173 B2
Methods, intermediate radio units and radio heads of base station systems for transmission of antenna carriers
Elmar Trojer, Täby (SE); Miguel Berg, Sollentuna (SE); Per-Erik Eriksson, Stockholm (SE); Aldebaro Klautau, Marco-Belem-Para (BR); Chenguang Lu, Sollentuna (SE); Leonardo Ramalho, Marambaia-Belem-Para (BR); and Marcos Takeda, Icui-Ananindeua-Para (BR)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Jun. 21, 2022, as Appl. No. 17/845,334.
Application 17/845,334 is a continuation of application No. 16/642,697, granted, now 11,382,173, previously published as PCT/SE2017/050866, filed on Aug. 31, 2017.
Prior Publication US 2022/0394817 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 88/08 (2009.01); H04B 7/04 (2017.01); H04B 10/2575 (2013.01); H04W 24/02 (2009.01); H04W 72/0453 (2023.01); H04W 92/12 (2009.01)
CPC H04W 88/085 (2013.01) [H04B 7/04 (2013.01); H04B 10/25753 (2013.01); H04W 24/02 (2013.01); H04W 72/0453 (2013.01); H04W 92/12 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A base station system, comprising:
a baseband unit (BBU); and
an intermediate radio unit (IRU) operable to communicate with a first radio head (RH), the first RH being arranged for wireless transmission in radio frequency (RF) of a plurality of antenna carriers to user equipments (UEs), wherein:
the BBU is configured to produce a plurality of digital data flows, each digital data flow being associated with a different one of the plurality of antenna carriers, and
the IRU is further configured to:
receive in a baseband frequency range the plurality of digital data flows;
multiplex the plurality of digital data flows into a frequency multiplexed digital intermediate bandwidth (IBW) signal comprising the plurality of digital data flows;
process the digital IBW signal comprising the plurality of digital data flows to produce a processed digital IBW signal comprising the plurality of digital data flows; and
transmit to the first RH the processed digital IBW signal comprising the plurality of digital data flows.