Most answered questions under tag nas

+1 vote

4 answers

Why we need Two types of Security modes (NAS,AS) in LTE

posted Oct 9, 2015 by Mallikharjuna Reddy

+5 votes

3 answers

Difference between attach and service request message ?

posted Nov 12, 2014 by Neeraj Mishra

+2 votes

3 answers

LTE: When the ESM Information Request message is sent by the MME to the UE ?

posted Mar 24, 2014 by Vimal Kumar Mishra

+1 vote

2 answers

LTE: What is the purpose of sending Bearer Resource Allocation Request to MME from UE ?

posted Dec 3, 2017 by Ganesh

–2 votes

2 answers

Why network triggers identity request after authentication procedure ?

posted Apr 11, 2017 by Sakshi Rai

+3 votes

2 answers

LTE: How does TAU procedure work ?

posted Nov 4, 2015 by Harshita

+3 votes

2 answers

LTE: When does a network prefer periodic tracking area update from an UE ?

posted Sep 29, 2015 by Vimal Kumar Mishra

+3 votes

2 answers

In the paging message send from MME to eNB , which paging ue identity is used ?

posted Jun 4, 2015 by Sachidananda Sahu

+2 votes

2 answers

Which NAS message is sent by UE to establish a dedicated bearer in LTE network ?

posted May 31, 2015 by Harshita

+3 votes

2 answers

Why does authentication procedure need to complete before security activation ?

posted Mar 10, 2015 by Harshita

+3 votes

2 answers

How does paging procedure work for an UE for SMS service in a lte network ?

posted Feb 11, 2015 by Vikram Singh

+2 votes

2 answers

How NAS Procedures Works In LTE

posted Aug 27, 2014 by Yogeshwar Thakur

0 votes

2 answers

How NAS messages are transported between the UE and the MME.

posted Aug 21, 2014 by anonymous

+1 vote

2 answers

Can anyone say what happens when MME does not support the security algorithms sent by UE

posted Jun 25, 2014 by anonymous

+2 votes

2 answers

LTE: Does UE send APN information within the Attach Request message ?

posted Mar 24, 2014 by Vimal Kumar Mishra

+3 votes

2 answers

LTE: What does mean by "MS is configured for NAS signalling low priority" ?

posted Oct 19, 2013 by Vikram Singh

+1 vote

2 answers

How MME handles Attach Req for emergency or non-emergency call ?

posted Oct 17, 2013 by Vikram Singh

0 votes

1 answer

Is nas security mandatory procedure while doing attach ?

posted Dec 1, 2020 by anonymous

+1 vote

1 answer

LTE: What is the use of different types of tracking area list for an UE provided by MME ?

posted May 15, 2018 by Harshita

+1 vote

1 answer

What is on demand system information transfer in 5G

posted Mar 5, 2018 by Mallikharjuna Reddy

+1 vote

1 answer

5G: What is the significance of new terms "SUCI" and "SUPI" ? And also which all places both are used ?

posted Feb 13, 2018 by Harshita

+1 vote

1 answer

LTE: Difference between default and dedicated bearer and on what basis it is decided which one to establish ?

posted Jun 12, 2017 by Vikram Singh

+1 vote

1 answer

What is TFT?Is it an Id or is it derived from the IP header of the packet(i.e. type of service field)?

posted May 16, 2017 by Bharat Kumar

+3 votes

1 answer

Clarification on security mode procedure in LTE

posted Sep 21, 2016 by Sachidananda Sahu

+3 votes

1 answer

TAU procedure in Connected mode and Idle

posted Aug 9, 2016 by Arijit Chakraborty

+2 votes

1 answer

LTE: What is the difference between Algo ID and Algo distinguisher while generating security keys ?

posted Feb 19, 2016 by Harshita

+2 votes

1 answer

LTE: When does an UE trigger Tracking Area complete message towards the network ?

posted Feb 7, 2016 by Vikram Singh

+2 votes

1 answer

LTE: How an UE come to know whether it has to perform periodic TAU or not ?

posted Jan 26, 2016 by Harshita

+3 votes

1 answer

What is EXTENDED SERVICE REQUEST for packet services (ESRPS) in lte ?

posted Jan 5, 2016 by Saurabh Bhardwaj

+4 votes

1 answer

LTE: How does authentication procedure work for the LTE network and why it is required ?

posted Dec 22, 2015 by Vikram Singh

+3 votes

1 answer

LTE: How TAU procedure can differ for different eNodeBs/cells of a tracking area ?

posted Dec 14, 2015 by Ganesh Kumar

+4 votes

1 answer

How can we send multiple UE paging records?

posted Sep 30, 2015 by Badikela Mahesh

+2 votes

1 answer

LTE: What does mean by attach in S101 mode ?

posted Sep 17, 2015 by Harshita

+4 votes

1 answer

Why Identity Request Need to be perform by MME after successful Authentication and Security Mode Complete...?

posted Mar 17, 2015 by Srinivas Sambari

+2 votes

1 answer

List of NAS messages available in LTE?

posted Feb 26, 2015 by Gnanendra Reddy

+3 votes

1 answer

How does network behave when UE sends TAU to a new/different MME ?

posted Feb 1, 2015 by Harshita

+4 votes

1 answer

What may be possible reasons to reject the tracking area update request for an UE in a lte network ?

posted Oct 22, 2014 by Harshita

+2 votes

1 answer

In which scenario, a MME can reject the service request message receives from an UE ?

posted Oct 21, 2014 by Harshita

+5 votes

1 answer

Difference between NAS level congestion control and APN based congestion control ?

posted Oct 18, 2014 by Harshita

+1 vote

1 answer

How NAS COUNT is constructed and managed during time...

posted Jul 27, 2014 by Hr

+1 vote

1 answer

How to handle NAS messages at RRC?

posted Jul 18, 2014 by anonymous

0 votes

1 answer

NAS Attach Complete message contains 2 security header type IEs and 2 protocol discriminator IEs

posted Jun 23, 2014 by anonymous

+2 votes

1 answer

LTE: Does TAU procedure need authentication of UE each time ?

posted Jun 11, 2014 by Ganesh

+1 vote

1 answer

LTE : Why does UE maintain various lists ?

posted Jun 3, 2014 by Vikram Singh

0 votes

1 answer

LTE: What is the significance of "Nonce" parameter ?

posted Jun 3, 2014 by Vikram Singh

+1 vote

1 answer

Normal Release vs Unspecified CAUSE code in NAS/LTE?

posted Jun 3, 2014 by anonymous

+3 votes

1 answer

LTE NAS: When EMM Information message sends to an UE ?

posted Apr 10, 2014 by Neeraj Mishra

+4 votes

1 answer

LTE: When UE sends NAS message to MME before sending rrc connection reconfiguration complete to the eNodeB ?

posted Apr 9, 2014 by Vimal Kumar Mishra

+3 votes

1 answer

LTE: What would be the possible causes for attach reject ?

posted Feb 19, 2014 by Ganesh Kumar

+3 votes

1 answer

LTE : What is NAS recovery procedure ?

posted Feb 17, 2014 by Harshita