Questions tagged [lte]
LTE - Long Term Evolution - originally, the long term evolution of the 3G wireless systems; today, refers to a specific wireless cellular system
23 questions
0 votes
0 answers
13 views
Internet drop out with outdoor modem [closed]
I'll try to be as specific as possible with my question, the symptoms are weird. I have a ZTE MC889 5g modem on a pole at my gate. This goes into a TP Link fibre convertor for the fibre run to the ...
- 1
-1 votes
0 answers
23 views
Unexpected UE Behavior
We recently observed an interesting issue during LTE testing: The eNodeB transmitted only a UL grant (DCI 0) for a UE — there was no DL grant intended for that UE in the same subframe. On the UE side, ...
1 vote
1 answer
146 views
Data link layer and transport layer differences/relationships
Hi I am a network engineering beginner learning about the TCP/IP stack in the context of using web services on an embedded system (processor connected to LTE cellular module). I am struggling to ...
- 13
0 votes
0 answers
49 views
Dedicated EC-GSM-IoT GSM frequency bands?
As far as I know EC-GSM-IoT is deployed in band with the regular GSM frequencies, but so far I couldn't answer the following questions: Do providers set aside dedicated frequencies in their GSM range ...
- 101
0 votes
0 answers
96 views
What is the purpose of VoLTE today?
Asking this under the "design or theory of protocols used to operate a network" topic. I'm managing (latest, up-to-date) android devices for a small NGO, where other volunteers must carry ...
- 133
0 votes
1 answer
73 views
How can a router that can connect to both a TD-LTE network and a mobile phone network determine which type of equipment to connect to?
From what I understand so far, the equipment installed on the BTS that TD-LTE routers receive internet from is different from the equipment that mobile phones receive internet from. I want to know how ...
- 1
2 votes
1 answer
85 views
Is GSM developed anymore? [closed]
Is the GSM standard/spesification developed anymore? Does the GSM spesification/paper get any updates anymore? Are UMTS, LTE, 5G NR versions of the GSM standard or separate standards? Of course them ...
- 21
0 votes
1 answer
305 views
Cisco C899G LTE ISR as transparent IP router/bridge
I have a Cisco ISR router C899G with LTE Cellular interface. I'd like to bridge the LTE into one of the eth ports in order to tap the wan link into my firewall device. When I try the BVI method as ...
1 vote
0 answers
98 views
A new pattern of IPv6 addresses in mobile network [closed]
When I checked the IPv6 addresses in a mobile network from the log, I found a strange IPv6 IID configuration pattern. As shown below, the common part of the IID of IPv6 addresses is :1:0:. 2401:4900:...
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1 vote
1 answer
113 views
In LTE CUPS architecture, when will the SX/PFCP session establishment is triggered?
Everywhere in LTE call flow and 5G call flow, I see that Sx or PFCP session establishment is triggered upon a initial-attach from UE reaching the control-plane. My question is, PFCP or SX is node ...
- 1,134
1 vote
0 answers
277 views
Using PBR or similar for an IP SLA for a C1111-8P-TLELA with a dynamic Cellular WAN IP
I am trying to get 4G Failover working on a Cisco C1111-8P-LTELA router. I have a known working solution that I usually use with IP SLA, and a local PBR route-map that forces traffic out of the ...
- 1,488
0 votes
2 answers
285 views
Automatically connect to Cellular Network (LTE)
I am working on implementing a LTE configuration on IOS-XE (ISR1000) devices. Issue we have is, that we have to "genereate" some traffic in order for the cellular interface to initiate a ...
- 1,761
0 votes
0 answers
48 views
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 ...
- 101
3 votes
1 answer
2k views
Cellular interface in VRF (LTE)
We are testing an LTE configuration with a Cisco C1113-8PLTEEA router. We already have a wired internet connection in a specific VRF called DSL. As far as i understand the LTE backup, we do have to ...
- 1,761
7 votes
2 answers
1k views
How are different phone/GSM operators connected with each other?
This might be a noob question, but I am having trouble finding an answer to it. Let’s say I am a new GSM operator. How would I go about connecting my network and my subscribers to the rest of the ...
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