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Questions tagged [mobile]

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

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2answers
69 views

How does cellular data differ from an ISP, and what can be tracked?

Are IP addresses given to a phone static or not? Also, how can phone companies keep track of a person if they wanted to find them? For example, I don't have an account and use a pre-paid card. I'm ...
1
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2answers
51 views

When a mobile phone is connected to a wireless mobile network, is it assigned an IP address?

When a mobile phone is connected to a wifi network, it is assigned an IP address. When it is connected to a wireless mobile network, is it also assigned an IP address? If yes, in terminal emulator, ...
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0answers
41 views

Mobile Country Code (MCC) and Mobile Network Code (MNC) associated with an IP address

I am looking for a way to deduce/estimate the Mobile Country Code (MCC) and Mobile Network Code (MNC) associated with an IP address. From an IP address, I am able to find the associated Country and ...
2
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1answer
44 views

Can mobile devices take a global IPv6 address by means of only routing?

I'm probably asking this the wrong way, but here it is; I have a /48 block with static addresses for every device on the network. Everything is routed, no NAT, no tricks. My question is: on a mobile ...
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0answers
76 views

Calculation of Traffic Channels per Cell in GSM

I have a query with respect to this question. It is from the book titled "Wireless Communications and Networking" by Vijay Garg. More specifically, my uncertainty is with regards to the part circled ...
2
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1answer
187 views

Is There an Indication in Protocol Stack showing that the End Host is Mobile?

Suppose you are using the Web from your mobile phone. Is there any indication in the internet backbone, when you look at the traffic that shows that the end host is a mobile device? I am sure there ...
5
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2answers
74 views

Network Ten LTE Hubs Into One Network

I'm working through a tricky situation getting a field office set up out in a very rural area. There are ten 12' x 60' trailers being set up (2-3 metres apart from one another), each with varying ...
6
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3answers
2k views

Does Cell Phone use Public or Private IP address? [closed]

Does mobile phone/cell phone get a private IP address or public IP address? If the cell phone gets a private IP address, I assume that the telecom operator uses carrier grade Network Address ...
2
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1answer
295 views

Cell information in GSM, UMTS, LTE

I'm trying to understand how a Mobile Station get the information about the cell from the BTS or the NodeB. The information I am looking for is : Mobile Country Code (MCC) Mobile Network Code (MNC) ...
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2answers
2k views

How does Mobile Number Portability work?

Mobile Number Portability (MNP) is a way to enable mobile phone users to change from one mobile network carrier (the donating network) to another one (the recipient network) while retaining their ...
0
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2answers
114 views

Mobile phone device to device communication via 3G\4G with no network provider [closed]

There are many applications that allows you to create a device to device communication between mobile phones using wifi and bluetooth with no needs of additional network infrastructure, but the range ...
0
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1answer
45 views

Handling high number of concurrent GSM device connections

How do telcos manage high concurrent GSM dial ins or dial outs? We are deploying thousands of remote, GSM enabled utility meters and have to manage too many GSM modems that the meters will dial in to. ...
0
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1answer
37 views

WiFi texting on a firewalled BGAN satellite link. How did this work? [closed]

I use an iSavi IsatHub for Internet connectivity when I'm in the backcountry out of cellular service. This device is a BGAN terminal and it works by establishing a data link with an Inmarsat satellite ...
0
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1answer
6k views

Difference between Mobile hotspot and Router [closed]

Question 1: I have a mobile which is connected to my home router. When I am connected to my home router, I cannot turn on Hotspot in my mobile whereas if my mobile is connected to internet via ...
0
votes
1answer
110 views

2G or 3G network standards [closed]

Can you list me names of the standards from where I can prove that 2G phones will not work over 3G network? I know it's a common fact but I need something like a standard.
3
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3answers
7k views

Increasing the MTU size for 3G/LTE networks

Is it reasonable to set higher MTU size between RAN (3g, LTE) and RNC/SGW? Say, we have S1-U interface with GTP encapsulation, which leads to reduced data size for mobile user. Data size can be ...
0
votes
1answer
224 views

If I create an “Access Point” server, could I have unlimited data on my phone? [closed]

The access point I am talking about is for phones; as in the method for connecting to data services. In the Access Point Names setting on my AT&T phone, I see these settings: Name: ATT ...
0
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2answers
2k views

What is the GSM location registration process?

For a mobile network what is the GSM location registration process?
4
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2answers
180 views

Mobile IP in a large-ish IPv4 network

So we are looking into implementing IP mobility in our network. The use case would be for a laptop to be able to roam between wired and wireless mode of operation while retaining all TCP/UDP based ...
3
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1answer
288 views

What is the IS-41 location registration process?

I am unsure what the IS-41 location registration process is. Could someone please explain this?
7
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4answers
4k views

Does IPv6 remove the need for a VPN?

I know that a VPN may be used in lots of different ways for lots of different things, so I'm not suggesting that IPv6 removes the need for a VPN completely. I'm interested in one particular use-case: ...
8
votes
2answers
190 views

Who Actually Utilizes Mobile IP?

I'm presently teaching a networking class, and the various texts that I've cobbled together all discuss Mobile IP. I always try to give real-world examples of how protocols are utilized, but the ...
0
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2answers
97 views

For 2G/GSM networks, is there “portable” cellt towers?

Let's suppose I am in the middle of the desert or some kind of jungle, and I have no 2G/GSM Signal. I would like to know if there is any civilian technology (that is or maybe isn't available to the ...
1
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2answers
270 views

Does a VPN service “anonymize” a mobile connection just as much as a landline connection?

I recently read about a proposal by the military government in Thailand to make tourist SIM-cards "trackable". That got me thinking about security when accessing the Internet via a mobile connection ...
1
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2answers
316 views

long range antenna

we want to provide mobiles and laptops in site B with internet connection using long range antenna, but it is not permitted to put any communication devices (ex. AP) there. 1- is there any ...
0
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2answers
218 views

Is it possible to passively send a Wi-Fi frame to a device not in the same network? [closed]

i want to know if it is possible to passively send Wi-Fi frames (RTS/CTS?) to a device, knowing only the mac address. If so, is there any tool, on Kali Linux, to do a such thing? (The device is a ...
4
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0answers
349 views

CISCO ISE Identity Management Group assignment

The Scenario in Brief Three types of devices can exist on our wireless networks: AD joined, corporate owned (Windows PC/Laptop/Surface) Non-AD Joined, corporate owned (iPad/Chromebook and their ...
1
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1answer
53 views

How do Cell Modems know the tower Type they are connected to?

I hope this is the right place to ask this question but can someone tell me how a cell modem with network fallback/forward knows what network it is connected too? Is there typically an AT-Command ...
2
votes
1answer
201 views

Does base station electric power consumption depend on the traffic?

It is told that mobile Base Stations consume approximately 1 kW of power non-stop. Meantime I read that watching a movie every week at your mobile phone consumes as much energy by the network as ...
1
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2answers
167 views

Do wireless devices such as smartphones transmit beacon equivalent frames such as APs do?

Can they be made to announce their presence somehow using layer 2 frames without them be connected to any network or access point? Can their MAC address be found?
0
votes
1answer
58 views

Mobile phone fallback with custom basestation

If a custom base station was placed in an area with mobile devices nearby, would they automatically fall back to 2G from 3G, since the 2G signal was stronger? Or would the 3G signal need to be ...
1
vote
2answers
76 views

Does the cell phone model affect the arrival time of SMS

I am developing an SMS based system, and I was asked if the cell phone model has a significant effect on the arrival time of the SMS. Although, I'm a bit sure it doesn't because of my testing. I have ...
1
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1answer
90 views

Mobile Wireless Technology

Nowadays, most smartphones (or other smart mobiles) have some kind of wireless communication for short range and medium range. For short range, the most widespread technology in use is, probably, WiFi:...
2
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3answers
78 views

GPRS client identification

I would like to get advice about client identification connected over gprs network. Is it possible to solve identity in simple TCP packet or exist some higher protocol to obtain IMEI? There is many ...
0
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1answer
342 views

Comparison between 2g and 3g in terms of PHYSICAL layer

I am doing a little research about comparison between 2g and 3g wireless communication technologies in terms of physical OSI layer. I want to focus especially coding differences. However, I couldn't ...
2
votes
1answer
208 views

RSSI versus available bandwidth, cellular context

In surveying cellular "coverage" over a geographic area, one could record any of several metrics, RSSI and practical bandwidth/throughput (e.g., Speedtest) among them. I understand that RSSI is ...
3
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1answer
202 views

In OLSR instead of MS if MPR selector are used, will it work?

In the TC message of OLSR that is created by each node x, x includes its MS set, i.e., a list of nodes that have selected it as an MPR. Assume instead ...
4
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1answer
196 views

OLSR mobile routing protocol

In OLSR we have the MPR - Multi Point Relays and MS - Multi Point Relay Selector. During the topology control messages flood, each MPR floods its MS set. Based on the MS set info of each node, every ...
2
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1answer
529 views

what is the difference between LTE and LTE Band 4?

I see some mobile operators mentioned LTE and some are mentioning LTE with band 4. What is the difference between those two ?
1
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1answer
2k views

In which cases is the PDP context terminated

In a mobile network the UE establishes a PDP Context in order to transmit an receive data. In which cases the PDP contexts is terminated. For example - is it terminated when: the UE is switched off ...
2
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1answer
483 views

Structural unknown HCI Command in Bluetooth LE logs

I am inspecting the Bluetooth HCI snoop logs as part of debugging an application. For dissecting the logs/Bluetooth LE packets I'm using Wireshark. I found that there is a recurring unknown command ...
2
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2answers
113 views

How common is it for mobile network operators to give the same IPv4 address to different 3G devices?

Do they have to give different IPv4 addresses?
2
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3answers
1k views

Are voice and data transmitted differently?

Most mobile carriers' plans charge voice and data charged separately and differently. Consider in 2G,3G or 4G networks respectively: does it mean that voice and data are transmitted differently at ...
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0answers
65 views

Broken session detection in mobile network

I'm interested in TCP connection between mobile unit which is connected over GPRS to server on public network. I need to keep open, so I will send periodically keep-alive packets for hold session. ...
0
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1answer
195 views

Is only user plane traffic going through 3GDT in UMTS/HSPA network

If we have mobile network with working 3GDT then a big part of the 3G data traffic goes through the direct tunnel. This is for offloading the SGSN. Iu RNC-------------SGSN | |...
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1answer
3k views

What is SA, SA1, SA2, SA3, SA4 stand for in 3GPP Spesifications

In 3GPP spesification vocabulary document http://www.3gpp.org/DynaReport/21905.htm. I could not find definition for abbreviation definition for "SA", SA1 and soon that occur in 3GPP specification such ...
2
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2answers
231 views

Why do the majority of probe requests captured have an invalid OUI in their MAC address?

I'm working on replicating some research wherein users were profiled based on the SSIDs they asked for when sending out 802.11 probe requests. I only captured probe requests, so information from ...
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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!) ...
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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
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3answers
717 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 ...