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Questions tagged [mobile]

A tag for discussion of "mobile", topics on how the mobile devices proceed to access mobile services

3
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3answers
4k views

Detecting 2G/3G/4G Devices

There are one or two answers that come close to answering this question but they either fall short or go in straight at the deeper end. Essentially, I am interested (for genuinely academic reasons!) ...
3
votes
3answers
2k views

Why not all data traffic is going through the 3GDT in 3G data network

What is the reason for only part of the 3G data traffic to be going through the 3G Direct Tunnel and another part is going through the SGSN. There are counters for traffic in IuPS interface which ...
0
votes
3answers
725 views

Why is a TMA always mounted near the antenna?

Why do TMAs have to be mounted near the antenna of the basestation? Is there any technical restrictions for mounting the TMA near the BTS? I have never seen a TMA inside the shelter near the BTS; all ...
1
vote
0answers
476 views

Can I use 1 GSM antenna connected to multiple GSM modems?

I have multiple GSM modems connected to a laptop and now I want to increase their signal. I thought in buying an antenna and a repeater and put the repeater next to the modems. As far as I know, the ...
1
vote
2answers
247 views

I have a bit confusion about the deployment of HSPA?

After many research I found that HSPA share the UMTS 5 Mhz band. However, I have not understood how can these two thechnology share it and why don't operator use only HSPA technology if it can offer ...
5
votes
1answer
1k views

Do Full MVNO's need S-GW in their LTE network?

Presently I am analysing the LTE network architecture for a full MVNO network. I am just wondering whether S-GW is required as part of MVNO LTE architecture or MNO - SGW will be able to communicate ...
1
vote
0answers
179 views

Is it possible to calculate the path loss in an UMTS system if the current HNB CPICH power and RSCP values are known?

Please let me further elaborate on my question: Let's say we have an HNB with 2 Watts of power allocated for the common pilot channel. This would mean that the radiated signal power at the HNB site (...
3
votes
1answer
2k views

How does “location update” happens in your mobile?

I have learned that your mobile periodically updates it's location when it moves from one location area to another and I learned that some updates will be made to VLR and HLR like in VLR your details ...
0
votes
2answers
558 views

How GSM network routes Internet packets?

How does a GSM network route internet packets? Does GSM use NAT based PAT like a physical Router? For example, user A visits website #1 and user B visits website #2. how data of website #1 are given ...
6
votes
3answers
751 views

How does a network know whether to send via internet/wifi or through cellular service?

I have a decent understanding of networking, but this question popped up in my head randomly and I can't figure it out. For example, if I have an iPhone that is used on a 3G network but is also ...
0
votes
1answer
108 views

Do smartphones require additional hardware to communicate using DSRC?

Dedicated short-range communications are one-way or two-way short-range to medium-range wireless communication channels specifically designed for automotive use. DSRC uses the 5.9 GHz band allocated ...
3
votes
1answer
2k views

Typical 3G data session management

I am trying to understand what constitutes a new data session as listed in a CDR, where the packet switching core is a typical Nokia Siemens setup. Firstly, are data sessions managed between a phone'...
4
votes
1answer
570 views

Do MVNOs have their own PGWs?

In mobile networks, there is this thing called PGW, which acts as the gateway between the internet and the internal network of the operator. (From the user's perspective, this could be seen as the ...
2
votes
1answer
1k views

Location Request (MT-LR and MO-LR) ASN.1 messages

I am unable to identify the 3GPP specification that gives me message structure in ASN format for MT-LR and MO-LR. Please let me know about this. I browsed through many RRLP, RRC, LTE, LPP documents ...
2
votes
1answer
453 views

When LTE to UMTS IRAT handover is made, what changes occurs in MAC layer?

I have not been able to figure out any changes in MAC layer. If there doesn't occur any change then please give the reason
1
vote
0answers
636 views

UMTS Architecture and differences between releases

I am studying the evolution of mobile network technologies and trying to get a clear overview of the UMTS network achitecture. However, I found it hard to decide which release of UMTS is considered ...
13
votes
3answers
64k views

What is the meaning of RSSI?

When using mobile 3G routers, you see in the output of the "show cellullar 0 all" command. What is the significance of this value? Is this interpretation the same when talking about 2G or 3G? Ex: ...
2
votes
1answer
133 views

How can I log authentication errors in 3G routers?

What command (debug) can I use to see authentication errors on a cisco 3G router specifically for the 3G connection?
12
votes
2answers
466 views

Can I use Cisco Anyconnect with mobile devices?

I've got a lot of clients with mobile devices that want to connect to our corporate network which uses Cisco Anyconnect. How can my clients connect to our VPN using a mobile device?