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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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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: ...
12
votes
2answers
470 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?
7
votes
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: ...
7
votes
2answers
201 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 ...
6
votes
3answers
800 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 ...
6
votes
3answers
3k 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 ...
5
votes
2answers
80 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 ...
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 ...
4
votes
1answer
604 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 ...
4
votes
1answer
201 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 ...
4
votes
0answers
378 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 ...
3
votes
3answers
9k 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 ...
3
votes
3answers
4k views

Detecting 2G/3G/4G Devices [closed]

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 ...
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'...
3
votes
1answer
337 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?
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 ...
3
votes
2answers
188 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
votes
1answer
214 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 ...
3
votes
1answer
116 views

How is a MS (Mobile Station) Identified prior to GPRS attach?

So, originally the MS sends a Packet Channel Request over PRACH and then the BSC (PCU) responds with a Packet Uplink Assignment over PAGCH. How does this PDTCH allocation get picked up by the correct ...
2
votes
2answers
328 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 ...
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?
2
votes
1answer
188 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 ...
2
votes
1answer
567 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 ?
2
votes
2answers
117 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
votes
2answers
253 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 ...
2
votes
1answer
51 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 ...
2
votes
3answers
84 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 ...
2
votes
3answers
2k 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 ...
2
votes
1answer
365 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) ...
2
votes
1answer
219 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 ...
2
votes
1answer
224 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 ...
2
votes
1answer
513 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
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
467 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
2answers
172 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?
1
vote
2answers
55 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, ...
1
vote
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 ...
1
vote
2answers
104 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
vote
2answers
77 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
vote
2answers
251 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 ...
1
vote
1answer
58 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 ...
1
vote
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 ...
1
vote
2answers
349 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
vote
1answer
94 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:...
1
vote
0answers
37 views

Can you create an open LTE network?

Being an ex-politician, I've had to discuss "free city-wide Wi-Fi" many times. What I've always been thinking is, why don't we just have free 3G/4G in the city? Is it possible to have an "open" LTE ...
1
vote
2answers
157 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
vote
0answers
66 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. ...
1
vote
1answer
4k 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 ...
1
vote
0answers
497 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 ...