T-Mobile Launches Nationwide 5G Network in USA

in News, 5G, T-Mobile
T-Mobile 5G Map

T-Mobile has rolled out 5G nationwide network, covering more than 200 million people and more than 5,000 cities and towns all across the country. 5G on 600 MHz spectrum goes far beyond the limitations of the carriers’ 5G. With clear 600 MHz spectrum reserved for 5G,

O2 and Ericsson Start Commercial 5G in UK

in News, 5G, Ericsson, O2
Ericsson 5G RAN

UK Service Provider O2 has launched commercial 5G in several major cities enabled by Ericsson 5G Cloud Core and 5G Radio Access Network (RAN) products and solutions. O2's 5G networks have been switched on in Edinburgh, Cardiff, Belfast and Leeds, supporting commercially available O2 5G smartphones.

Nokia and Orange Polska Launch 5G Tests in Lublin

in News, 5G, Nokia, Orange
5G

Nokia and Orange have started 5G testing in the city of Lublin, Poland, as part of the next stage of network trials in the country. Ten Nokia 5G base stations operate in the Ponikwoda, Tatary, Wieniawa and Śródmieście districts.     

T-Mobile Makes Standalone 5G Data Session on a Multi-Vendor Radio and Core Network

in News, 5G, T-Mobile, LTE
T-Mobile 5G

T-Mobile USA has announced that the operator has made successful standalone end-to-end 5G data session on a multi-vendor 5G next-generation radio and core network, an important step in realizing the true potential of 5G.

Ericsson Demonstrates Live 5G at Google I/O 2019

in News, 5G, Ericsson, Google
Ericsson 5G at Google I/O 2019

Ericsson brought live 5G network coverage for developers from around the world at the annual Google I/O event in Mountain View, California this week. Google had selected Ericsson as 5G infrastructure provider for this year’s developer conference, I/O 2019.

Verizon Starts Offering Commercial 5G Service for 5G-enabled Smartphones in Select Areas

in News, 5G, Verizon
Verizon 5G Ultra

Verizon has turned on its 5G Ultra Wideband network in select areas of Minneapolis and Chicago last week. Verizon customers can access a commercial 5G network with the 5G-enabled smartphone, the moto z3 combined with 5G moto mod. 

5G NG-RAN and UE identifiers

in 5G, NG-RAN identifiers

- RAN UE NGAP ID: A RAN UE NGAP ID shall be allocated so as to uniquely identify the UE over the NG interface within an gNB. When an AMF receives an RAN UE NGAP ID it shall store it for the duration of the UE-associated logical NG-connection for this UE. Once known to an AMF this is included in all UE associated NGAP signalling.

MR-DC with the 5G

in MR-DC, MR-DC with the 5G
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There are three possible MR-DC with the 5GC architectures as follow:  1. E-UTRA-NR Dual Connectivity: NG-RAN supports NG-RAN E-UTRA-NR Dual Connectivity (NGEN-DC), in which a UE is connected to one ng-eNB that acts as a MN and one gNB that acts as a SN.

E-UTRA-NR Dual Connectivity (EN-DC)

in 5G, Dual Connectivity, E-UTRA-NR Dual Connectivity, EN-DC
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E-UTRAN supports MR-DC via E-UTRA-NR Dual Connectivity (EN-DC), also called MR-DC with EPC, in which a UE is connected to one eNB that acts as a MN and one en-gNB that acts as a SN. The eNB is connected to the EPC via the S1 interface and to the en-gNB via the X2 interface. The en-gNB might also be connected to the EPC via the S1-U interface and other en-gNBs via the X2-U interface.

Dual Connectivity (DC) and Multi-Radio Dual Connectivity (MR-DC)

in 5G, Dual Connectivity, MR-DC, Multi-Radio Dual Connectivity, 4G
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E-UTRAN supports Dual Connectivity (DC) operation whereby a multiple Rx/Tx UE in RRC_CONNECTED is configured to utilise radio resources provided by two distinct schedulers, located in two eNBs connected via a non-ideal backhaul over the X2 interface

5G Xn Interface Protocol Architecture

in 5G, Xn Interface, Xn-C, Xn-U
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The Xn User plane (Xn-U) interface is defined between two NG-RAN nodes.  The transport network layer is built on IP transport and GTP-U is used on top of UDP/IP to carry the user plane PDUs.

5G NG Interface Protocol Architecture

in 5G, NG Interface, NG-C, NG-U
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The NG user plane interface (NG-U) is defined between the NG-RAN node and the UPF. The transport network layer is built on IP transport and GTP-U is used on top of UDP/IP to carry the user plane PDUs between the NG-RAN node and the UPF.

NG-U provides non-guaranteed delivery of user plane PDUs between the NG-RAN node and the UPF.

Separation of gNB-CU-CP and gNB-CU-UP

in 5G, gNB, gNB-CU-CP, gNB-CU-UP
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gNB-CU-Control Plane (gNB-CU-CP): a logical node hosting the RRC and the control plane part of the PDCP protocol of the gNB-CU for an en-gNB or a gNB. The gNB-CU-CP terminates the E1 interface connected with the gNB-CU-UP and the F1-C interface connected with the gNB-DU.

5G NG-RAN Radio Protocol Architecture

in 5G, 5G NG-RAN, 5G NR, 5G Radio Protocol Architecture
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The different sublayers used in  Radio Protocol Architecture are: Medium Access Control (MAC), Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP) and Service Data Adaptation Protocol (SDAP), Radio Resource Control (RRC) and Non-Access Stratum (NAS). Where:

-The physical layer offers to the MAC sublayer transport channels;

5G NG-RAN Architecture

in 5G, 5G Architecture, NG-RAN Architecture
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gNB Central Unit (gNB-CU): a logical node hosting RRC, SDAP and PDCP protocols of the gNB or RRC and PDCP protocols of the en-gNB that controls the operation of one or more gNB-DUs. The gNB-CU terminates the F1 interface connected with the gNB-DU.