Questions tagged [5g]

5G wireless networks - the 5th generation of cellular systems

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How does RLC send notification to PDCP or RRC?

According to 3GPP, 38.322: if RETX_COUNT = maxRetxThreshold (RLC) indicate to upper layers (PDCP, RRC) that max retransmission has been reached. (section 5.3.2) When receiving a positive ...
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What is the significance of IPv4 Link MTU?

Can someone please explain the significance of "IPv4 Link MTU" for Network to MS direction as well as for MS to network direction? What does SMF do when it receives "IPv4 Link MTU ...
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How & When does User equipment gets to know what is the SFN(system frame number) during Handover process?

Take an example: UE camps to an LTE network let's say LTE B66. Network sends RRC reconfiguration to measure the neighbor cells. UE scans & sends measurement report reporting neighbor cells. Now ...
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5G PUSCH resource allocation at gNB for multiple UEs in Random Access procedure

As specified by 3gpp specifications, the initial access process is a random access procedure. The first step is to transmit a preamble over the PRACH occasion. If the base station successfully decodes ...
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What is "n6" in transparent architecture (NG-RAN)?

Hello everyone! I study the NG-RAN logical architecture described in TS 38.401, baseline for NTN scenarios. I have found the picture of transparent architecture, you see below. I can not find a ...
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5G: How to Integrate or Implement the 3GPP NWDAF? [closed]

I set up a Free5GC with EURANSIM emulator. As specified in the test cases, the setup is functioning as intended. Currently, I'm attempting to integrate the 5G 3GPP NWDAF (Network Data Analytics ...
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Does a VPN encryption get stripped from data during cellular transmission?

These phones have all the generations of connectivity but “only use 5G.” On top of that the new GPS Satellite iPhone feature for people that get lost does a VPN protocol work for that, what about ...
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Data usage counting in LBO roaming mode

When roaming in Local Break Out (LBO) the data stays within the VPLMN and the data has not to be forwarded to the SMF and UPF of the 5G core of the HPLMN. While this is attractive for the latency I'm ...
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Time synchronization at network Level

Let suppose we have a scenario where we are getting 5G network and its phase and time synchronization for the radio interface is PTP(precision time protocol). Using that 5G network I have my local ...
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point-to-point at IP layer

I was reading one of 5G standards specifying signalling transport https://www.etsi.org/deliver/etsi_ts/138400_138499/138472/15.06.00_60/ts_138472v150600p.pdf and noticed (section 6): The IP layer of ...
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5G: Mapping QoS flow to a DRB requiring out-of-order delivery

I understand that 5GNR allows out-of-order delivery for some DRBs by configuring them as such. Also, I understand that a QoS Flow is mapped by SDAP to a DRB based on QoS parameters provided from the ...
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If a module support NB-IoT and LTE-M, is it a 5G module?

According to the article here, 5G NR (New Radio) doesn't cover low power wide area network (LPWAN). Some descriptions of modules said they support LTE-M and NB-IoT, which are actually considered as 4G ...
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LTE NR split throughput among different bands and carrier

Using a mobile device I can measure the throughput in download and upload while connected to an LTE and/or NR mobile cell. If I know the details of the cells to which the device is connected and so I ...
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5G NR PUCCH format-0

In 5G-NR PUCCH format-0, for multiplexing of UE's (i.e., UE's sharing the same RB for resource allocation) which are sending the same/different HARQ's or SR should have different initial cyclic shift(...
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5g authentication method for IoT [closed]

While i was studying authentication methods in 5g i bumped into 3 authentication methods that seems to be the most important ones: 5G-AKA,EAP-AKA,EAP-TLS. Which one of these three could be more ...
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Is MIMO equivalent to link aggregation?

Is MIMO the wireless version of link aggregation in wired networks? I'm not asking if MIMO is a similar link aggregation protocol like LACP or PAgP, what I'm asking is if it is the same concept as ...
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Packet scheduling in LTE/5G core network components

Scheduling algorithms must be used on the radio side of these technologies in order to map radio sources to incoming/outgoing data packets and satisfy quality of service requirements such as latency ...
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What is the difference between SDN node and SDN enabled Base station? [closed]

I am pretty sure every network engineer would have heard about "SDN" i.e. Software Defined Network, the base of 5G network. Very soon we will be enjoying 5G in our smartphone :) I have a doubt ...
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