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W2L? 5G - your entry point

Discussion of forensic issues related to all types of mobile phones and underlying technologies (GSM, GPRS, UMTS/3G, HSDPA, LTE, Bluetooth etc.)
Subforums: Mobile Telephone Case Law
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W2L? 5G - your entry point

Post Posted: Fri Mar 03, 2017 6:38 am

W2L? Want 2 Learn? Mobile Broadband Networks are the crucial element between endpoints and operators/clouds. The who controls - not owns - this element controls the world. Critical and dangerous simultaneously. Hang-in NOW to learn about 5G: Your entry point and backup for your forensics future.

www.3gpp.org/ftp//Spec...61-200.zip  

Last edited by RolfGutmann on Thu Jun 15, 2017 9:34 am; edited 1 time in total

RolfGutmann
Senior Member
 
 
  

Re: W2L? 5G - your entry point

Post Posted: Sun Apr 16, 2017 5:34 pm

NR New Radio - never heard before? With 5G it will come. See the latest in 5G dev by 3GPP 5G summit on April 6th.

Just fly over - you just learn by watching and no reading Smile

docbox.etsi.org/Worksh...ASTRUCTURE  

RolfGutmann
Senior Member
 
 
  

Re: W2L? 5G - your entry point

Post Posted: Sat Jun 03, 2017 5:16 am

Verizon in colab with South Korea Telecom works fast on 5G. See the new specs here

www.5gtf.net

Your chance to get a Mobile GigaBand expert. Hang-in now!  

RolfGutmann
Senior Member
 
 
  

Re: W2L? 5G - your entry point

Post Posted: Tue Jun 13, 2017 4:45 pm

In LTE or LTE-A a Mobile Station MS is actually connected over Multiple Input Multiple Output MIMO with the evolved Node B eNB. By underlying a bandwidth of 20MHz and two carriers (Carrier Aggregation CA) you get a total of 40MHz bandwidth (downlink). This is called 2 spatial multiplexing layers, think about downlink and uplink count as 1 spatial multiplexing layer. The uplink Peak to Average Power Ratio PAPR is limited to Single Carrier SC-PAPR as the MS has limited power resources to spend. In coming 5G it was defined that the waveform will be Cyclic Prefix - Orthogonal Frequency Divison Multiplexing CP-OFDM (orthogonal stands for rectangular). But in 5G things are different.

www.mitsubishielectric...g_5g03.jpg

You see there you get now 8-16 spatial multiplexing layers (Spatial Streams) and 5G will be based on massive MIMO (multiple Carriers by 4x4 MIMO) and the MS could be connected to multiple cells (pico cells, small cells and (big) macro cells are often mixed in urban areas and called Heterogenous Net, short HetNet).

Cell Site Analysis and triangulation could be much more precise based on geometrics and vectors but on the other side looms an explosion of antenna connection points. Up to 5 points (5 Carriers Aggregated = 5 CA) - remember a user with mobile often is moving and therefore mobile - have to be investigated.

How has law enforcement to prepare for this? To wait until 5G is rolled-out is too late.

Share your thoughts please.  

Last edited by RolfGutmann on Thu Nov 23, 2017 11:00 am; edited 1 time in total

RolfGutmann
Senior Member
 
 
  

Re: W2L? 5G - your entry point

Post Posted: Thu Jun 15, 2017 6:59 am

If you want to learn about Cyclic Prefix Frequency Division Multiple Access CP-FDMA as the defined 5G waveform you find a Qualcomm research paper here. Notice that in the race for 5G two types of players are in the game: Network-side, the infrastructure and User-side the 5G modem (modulation, demodulation) manufacturers like Qualcomm).

Mobile Forensics primary focus on the User-side like the mobiles, IoT, cars etc.. Digital Crime tries to hack-up prepaid amounts, hide and fake IMEIs, location-cascade-hiding etc.

webcache.googleusercon...clnk&gl=ch

As this is a reseach paper consider that just step by step finally defined elements occur out of new 3GPP Rel. 14 standards.

You have 2-3 years left to become a 5G forensics expert. Take your chance Smile  

RolfGutmann
Senior Member
 
 
  

Re: W2L? 5G - your entry point

Post Posted: Tue Jun 20, 2017 6:35 pm

In this video you learn how signalling and data runs in LTE, well explained Smile

www.youtube.com/watch?v=yrTwt_jdu40  

RolfGutmann
Senior Member
 
 
  

C-DRX

Post Posted: Sun Jul 23, 2017 4:14 pm

Connectec Mode Discontinuous Reception C-DRX is a term you should know. Even if there is no traffic a UE has to keep listening to the network (paging). DRX saves battery life. If a network is run by DRC it means only in RRC_Idle state the RF transceiver can sleep. In C-DRX immediately after the last subframe loaded with data arrived two short-DRX cycles followed by two long-DRX cycles start. In both cycle types after two subframes the RF transeiver can sleep - save battery drain.

C-DRX saves more battery drain than 'default' DRX.

Learn here

www.netmanias.com/en/?...g&no=12519

You really W2L? The hard piece here

www.sharetechnote.com/...E_DRX.html

Next will come: WTTx  

RolfGutmann
Senior Member
 
 

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