In a previous post I referenced a paper of Keysight as a good starting point to understand how Active Antenna Systems (AAS) that have been specified for 3GPP 5G New Radio (NR) could improve overall capacity in a cell and extend the cell range. Today, I have found another interesting paper on the topic that … Continue reading 5G Active Antenna Systems (AAS) Revisited
If you are interested in how a 5G EN-DC Option 3 connection is set-up between the mobile device and different components in the network the best but also the hardest way is to look up the procedures in a number of different 3GPP specifications. 3GPP TS 37.340 is a good starting point for EN-DC. Another … Continue reading 5G EN-DC Option 3 – Call Flows
Speaking about how much spectrum is needed by a network operator to make a difference with 5G, I had a closer look at how the German telco regulator wants to go forward with the auction of spectrum in the 3.6 GHz band. The spectrum auction is scheduled to take place in 2019 and the details … Continue reading 5G Spectrum For Germany – How Much For Whom?
While in Europe, most network operators have the 3.x GHz band in mind when thinking about 5G deployments. Some network operators in the US, however, want to launch 5G in the mmWave bands in the 20-50 GHz range. So how will antennas in mobile devices look like for these bands?
The current situation around 5G reminds me a bit of how things were a decade ago when first 4G LTE networks came on air. Network operators in the US launched LTE with 10 MHz of spectrum and overall, their LTE networks where not much faster, if at all, compared to 3G UMTS/HSPA in Europe that … Continue reading 5G – How Much Spectrum Do You Need To Make A Difference?
In most situations the limiting factor when transmitting data over the air between a mobile device and a network is the uplink transmission power of the mobile device. In practice that means that when the mobile device is unable to increase its transmission power any further, it can still focus the transmission power on a … Continue reading 5G EN-DC – Split Bearer In Downlink Only
Every now and then I get the question why virtually all network operators that want to offer 5G mobile service go for the non-standalone setup first that requires LTE as the anchor instead of going directly to a standalone setup. There are a number of reasons for this but I guess that spectrum availability is … Continue reading Why Not Standalone 5G From The Beginning?
In 5G, Massive MIMO is considered as the holy grail to increase individual datarates, to improve cell capacity, to extend range, or any combination of these. mMIMO is not a single technique, however, there are a number of different flavors that can to a degree be mixed and matched to achieve different things.
I recently came across this paper of Huawei on 5G Spectrum matters and one paragraph in particular caught my attention: “[…] inter-operator synchronisation and alignment of uplink/downlink transmissions (slot and frame synchronization) is […] necessary for efficient deployment of 5G NR networks in unpaired assignments.” In other words this sentence says that network operators using … Continue reading 5G TDD: Synchronization Across Networks Required?
The abbreviation EN-DC (eUTRAN New Radio – Dual Connectivity) indicates that in this type of 5G deployment, 4G LTE and 5G NR will be used simultaneously. However, it looks like that the combination of some frequency bands might prove to be a bit problematic due to self interference as laid out in this interesting whitepaper … Continue reading 5G EN-DC: What is Single Uplink?