5
votes
what is the difference between LTE and LTE Band 4?
LTE is a standard for building a mobile network. It lists the available bands on which to operate on and Band 4 is one of those bands. See https://en.wikipedia.org/wiki/E-UTRA#...
- 1,076
5
votes
Does IPv6 remove the need for a VPN?
The primary point of IPv6 is that it restores the original idea of every device having a unique IP address, which restores the end-to-end concept of IP. NAT is a kludge to extend the life of IPv4 ...
- 97.7k
5
votes
Increasing the MTU size for 3G/LTE networks
I think it's always best to allow end-user traffic to use an MTU of 1500. Therefore when encapsulated the overlay network has to cater for this either by a larger MTU size in the encapsulated domain ...
- 1,181
5
votes
Does Cell Phone use Public or Private IP address?
The Cell Phone get a Private IP address.They will do NAT as the packet leave out the Operator's network. They use Layer 2 PPP protocol to negotiate the IP for UEs.
Ifconfig output from my Mobile:
- 1,412
5
votes
Accepted
Network Ten LTE Hubs Into One Network
If you have access to 10 layer 3 switches you can certainly make this work. Treat each trailer as if it is a campus building with local internet. choose the trailer with the NAS as the core of the ...
- 311
4
votes
Accepted
Why not all data traffic is going through the 3GDT in 3G data network
Yes, there is a reason to it.
Be advised that even if the 3GDT is set up between RNC and GGSN, the "2G non home public" users , ie "2G roamer users" only use IuPS on your picture, and don't use 3GDT....
- 238
4
votes
Accepted
Why do the majority of probe requests captured have an invalid OUI in their MAC address?
It turns out the database I was working with was incomplete. I was using "python-netaddr" on Ubuntu 14.04, and this was significantly smaller than the Wireshark combined IEEE+misc database. After I ...
- 61
4
votes
Accepted
Do wireless devices such as smartphones transmit beacon equivalent frames such as APs do?
Do wireless devices such as smartphones transmit beacon equivalent frames such as APs do?
A wireless client does not transmit beacon frames. However if a device is configured to provide service (i.e. ...
- 27.1k
4
votes
long range antenna
Short answer: This is not going to work.
Depending where you live, there are regulations that specify the transmitter power and antenna type (gain). This varies with the frequency band you are ...
- 66.1k
4
votes
Accepted
Does IPv6 remove the need for a VPN?
I think your idea that consumer and mobile ISPs will give out static IPv6 is optimistic to say the least. Some may do so but many probably will not.
VPNs provide two main features.
They provide ...
- 12.8k
4
votes
Network Ten LTE Hubs Into One Network
Two ideas...
I think the typical way to handle it would be a router in every trailer with three subnets: one goes to a switch for a trailer LAN, one goes to a campus backbone LAN for access to ...
- 371
4
votes
Accepted
Is There an Indication in Protocol Stack showing that the End Host is Mobile?
An IP address is an IP address, and there is nothing in IP that distinguishes what you are looking for. There is the IANA IPv4 Special-Purpose Address Registry that explains all the special-purpose ...
- 97.7k
3
votes
Do wireless devices such as smartphones transmit beacon equivalent frames such as APs do?
802.11 specifies clients listen for AP beacons. They don't broadcast anything.
However, real world implementations (Windows, iOS, etc.) actively hunt for known SSIDs when they aren't associated. ...
- 31.1k
3
votes
Do Full MVNO's need S-GW in their LTE network?
In my opinion, S-GW is not required as part of full MVNO LTE architecture.
Because, in principle, the S-GW needs to connect to all the LTE Radio Network Coverage (eNodeB) and unfortunately, ...
- 238
3
votes
long range antenna
While it can work using highly directional antennas (which increase both transmission and reception at the AP for devices in the correct spatial region relative to the antenna, compensating for the ...
- 2,746
3
votes
Who Actually Utilizes Mobile IP?
I'd love to be corrected, but I believe that MobileIP was stillborn. There's a paper here from a researcher at Rutgers that summarizes the situation. The problem it was trying to solve - splitting ...
- 401
3
votes
What is the IS-41 location registration process?
IS-41 is a protocol used to manage many aspects of mobile (as in cellular phone) networks.
When someone places a call (or sends a text message or IP packet) to a subscriber of a mobile network, the ...
- 181
3
votes
Accepted
Increasing the MTU size for 3G/LTE networks
I've done some tests with different MTU values. All tests were performed for mobile data, no voice affected or tested.
Results are as follows:
Increased MTU in LTE network allows for more efficient ...
- 1,123
3
votes
Mobile phone device to device communication via 3G\4G with no network provider
There are multiple limitations:
Network Architecture: A communication from a mobile device to another is not direct, it must pass trough a BTS (Base Transceiver Station) and a MSC (Mobile Switching ...
- 4,477
3
votes
Can mobile devices take a global IPv6 address by means of only routing?
The ISPs will not route any IPv6 prefix longer than /48, and certainly not a /128 address for a single device, but there is Mobile IPv6 that automatically builds a tunnel back to the "home" ...
- 97.7k
3
votes
When a mobile phone is connected to a wireless mobile network, is it assigned an IP address?
If a host, including a phone, attaches to an IP network by DHCP, then it will get an IP address from a DHCP server on the network, assuming there is a DHCP server on the network.
Typically, a Wi-Fi ...
- 97.7k
3
votes
When a mobile phone is connected to a wireless mobile network, is it assigned an IP address?
Phones have a IP address. If you are connected to wifi you get the IP address from the wifi router. If not connected to wifi it get the ip from the cell provider.
- 61
3
votes
Can you create an open LTE network?
The answer is: "yes, technically"
You most definitely can create an open network, it's not even that hard. You won't realistically be able to start your own network, but many telecoms will gladly ...
- 131
3
votes
Why do we need to aggregate frames into a multiframe in GSM networks?
There are two kinds of multiframes in GSM. They are:
Traffic multiframe: 26 frames taking 120 ms. In a traffic multiframe, 24 frames are used for traffic. These are numbered 0 to 11 and 13 to 24. One ...
- 763
2
votes
Detecting 2G/3G/4G Devices
One cheap way - but only for GSM:
Buy a RTL SDR stick (about 15€) and trace the GSM traffic.
In the traffic you will find the Paging Requests (GSM 04.08 section 7.1.1). Paging requests are send from ...
- 121
2
votes
Detecting 2G/3G/4G Devices
You kind of want to do a site survey of a cell signals, but focus more on the users and not base stations. Yes, this is possible. There are commercial products which the cell phone companies use. ...
- 121
2
votes
Why is a TMA always mounted near the antenna?
Like every receiving amplifier, it is better put it near antenna.
Total power budget is the same whether put it near antenna or near BTS, BUT -
if you put it down it collects and amplifies noise ...
- 21
2
votes
I have a bit confusion about the deployment of HSPA?
This is correct, and in addition, the choice of the technology used depends also on the QoS allowed to the subscriber by the operator.
When a subscriber buy a simcard, this simcard has some uplink ...
- 238
2
votes
Accepted
Are voice and data transmitted differently?
It's normal for 2G to still go over SDH/PDH networks even if many mobile carriers are upgrading them to ethernet networks. If the same carrier has 3G and 4G technologies thay would most likley be ...
- 36
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