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MB LTE Attach Operations

ESM Cause - 50, 51, The purpose of the ESM cause information element is to indicate the reason why a session management request e. Meaning of the Cause defined in 3GPP. The details of ESM Cause is described in Single Address Bearer only allowed. Indicate that the requested PDN connectivity is accepted with the restriction that only single IP version bearers are allowed. If you expend this table into more detailed cases, we can describe the cases as follows.

IP Type. Requested by UE. ESM Cause. NAS Message. PDN Connectivity Reject. Also, RRC Connection Request. RRC Connection Setup. RRC Connection Release. EPS mobile identity. UE network capability. ESM message container. Length: ESM message container contents:. EPS session management messages 0x Procedure transaction identity: 2. ESM information transfer flag.

Protocol Configuration Options. Tracking area identity - Last visited registered TAI.Following table comes from This Timer value is set in Attach Accept message as well. Default 12 min. NOTE 1. At attach failure and the attempt counter is equal to 5. At tracking area updating failure and the attempt counter is equal to 5. Initiation of the attach procedure or TAU procedure. Start T or T as described in subclause 5.

At attach failure due to lower layer failure, T timeout or attach rejected with other EMM cause values than those treated in subclause 5. At tracking area updating failure due to lower layer failure, T timeout or TAU rejected with other EMM cause values than those treated in subclause 5. Default 54 min. Initiation of the periodic TAU procedure. Abort the procedure. On first expiry, the UE should consider the network as false. NOTE 3. Signalling connection released Bearers have been set up.

Release the signalling connection and proceed as described in subclause 5. NOTE 4. Note 1. The default value of this timer is used if the network does not indicate another value in an EMM signalling procedure. Note 2. The value of this timer is provided by the network operator during the attach and tracking area updating procedures. Note 3. The default value of this timer is identical to the value of T Note 4. The value of this timer is provided by the network operator when a service request for CS fallback is rejected by the network with EMM cause 39 "CS domain temporarily not available".

Note 5.Posting Komentar. Laman Beranda Telekomunikasi Pemrograman. The main function of the mobility management sublayer is to support the mobility of a user equipment, such as informing the network of its present location and providing user identity confidentiality. A further function of the mobility management sublayer is to provide connection management services to the session management SM sublayer and the short message services SMS entity of the connection management CM sublayer.

Label: LTETelekomunikasi. Tidak ada komentar:. Langganan: Posting Komentar Atom. This EMM cause is sent to the UE when the network refuses service to the UE either because an identity of the UE is not acceptable to the network or because the UE does not pass the authentication check, i. This cause is sent to the UE if the network does not accept an attach procedure for emergency bearer services using an IMEI.

This EMM cause is sent to the UE if it requests service, or if the network initiates a detach request, in a PLMN where the UE, by subscription or due to operator determined barring, is not allowed to operate.

This EMM cause is sent to an UE which requests service, or if the network initiates a detach request, in a tracking area of a PLMN which by subscription offers roaming to that UE but not in that tracking area.

Cause codes from network.

This EMM cause is sent to the UE if it requests service, or if the network initiates a detach request, in a tracking area where the UE, by subscription, is not allowed to operate, but when it should find another allowed tracking area or location area in the same PLMN or an equivalent PLMN.

This EMM cause is sent to the network if the UE detects that the UE security capability does not match the one sent back by the network. This EMM cause is sent to the network if the security mode command is rejected by the UE if the UE detects that the nonceUE does not match the one sent back by the network or for unspecified reasons.

This EMM cause is sent to the UE when the network has determined that the requested procedure cannot be completed successfully due to network failure. The failure is not expected to be temporary and repeated request is not likely to succeed in near future. This cause indicates that the equipment sending this cause has received a message with a non-semantical mandatory IE error. This cause indicates that the equipment sending this cause has received a message with a message type it does not recognize either because this is a message not defined, or defined but not implemented by the equipment sending this cause.

This cause indicates that the equipment sending this cause has received a message not compatible with the protocol state. This cause indicates that the equipment sending this cause has received a message which includes information elements not recognized because the information element identifier is not defined or it is defined but not implemented by the equipment sending the cause.

However, the information element is not required to be present in the message in order for the equipment sending the cause to process the message. This cause indicates that the equipment sending this cause has received a message with conditional IE errors.

This cause indicates that a message has been received which is incompatible with the protocol state or that a STATUS message has been received indicating an incompatible call state.

LTE X2 Handover(X2HO) Call Flow Procedure - LTE eNodeB Handover over the X2 Interface (Eng-Hindi)

This cause is used to report a protocol error event only when no other cause in the protocol error class applies.In this section, I will go through a typical protocol sequence of LTE packet call. This will be the backbone structure for all other call processing. Followings are the topics to be explained in this page. Understanding a complete a call processing steps means understanding everything about the technology.

So putting all the details of the call processing in this one page is impossible. Following is the over protocal sequence being exchanged between UE and Network. Actually understanding all the details of these steps would be the goal of your whole LTE career. Basic State Machine. Following diagram shows a possible state machine that a UE would go through.

Most of other transition will be described in "Handover" page. Of course, there would be a small variations but overall concept would be almost same. Following would be two major variations. The example test sequence in this case shows the second case.

attach failure in lte

Big Picture First. But I think there are a couple of big pictures that may help almost anybody working in full protocol stack. First big picture I would like to introduce is the channel mapping as shown below.

attach failure in lte

Just try to pick any RRC messages and try to follow the arrow for the message. Following is a sequence diagram showing not only the message but also basic configurations of each layer. More detailed description of each layer in the context of full protocol stack will be explained in " Full Stack " section.

Just read through this sequence whenever you have time until you can duplicate the sequence without looking into this again. This can be a good framework for your study and good guide for troubleshooting. RACH Response.Table of Contents. Introduction 2. Cases of Initial Attach. Simplified Call Flow in Each Case. The initial attach procedure may vary depending on circumstances. It can be as in EMM Case 1, to be explained below, or as in EMM Case 11 initial attach in another cityto be covered in the subsequent document later.

So, this document Part 1 of Initial Attach will describe different initial attach types, and find out their characteristics and differences from one another. The subsequent document Part 2 will focus on EMM Case 1, providing the related procedures in details. Chapter 3 briefly discusses different initial attach procedures of each case, by listing the functions to be performed by MME. Recently I cleared an interview in which your tutorials played a major role.

Subscriber has active G PDP session. What is the scenario when UE attempts to handover to 4G in this case? Had a question- Figure 2 Attache case 3. Thank you for breaking down the call flow into easy to understand steps supported with beautuful visuals.

Pls let me know what causes "Identification Response error cause ". All rights reserved. English Korean About Us. Samsung Cloud Native 5G Core. EMM Procedure 1. Initial Attach - Part 1. Download PDF File. Simplified Call Flow in Each Case 4. During one of my searches on detailed LTE information I came accross your site.

Looking at your papers and presentations, I must admit I never saw more detailled drawings than yours! Congratulations for those who created them! I wonder which software package are you using?

attach failure in lte

Hello Mr. Dirk Van Aken, Thanks for having interest in our site.

Most of our diagrams were created using Microsoft Visio. And we didn't use any special SW package. While providing professional consulting services in various technical fields over 10 years, we have created quite a lot of Visio templates ourselves. Sincerely, Netmanias. Top quality as always, really appreciating these english versions. Looking forward to the next technical document.Post a Comment. Make it easier to find for others who could need those information, allow them find these articles on the spot.

Recommendations until now. Hope any one will find them as useful I did. In the two tables you can easily find the times name it's default or suggested value, what is triggering it and what happens in case it will finally expire.

At tracking area updating failure and the attempt counter is equal to 5. Implicit detach from network if the UE is attached for emergency bearer services. On first expiry, the UE should consider the network as false and follow item f of subclause 5. On first expiry, the UE will follow subclause 5. The default value of this timer is identical to the value of T Paging procedure for EPS services initiated.

Paging procedure for EPS services completed. Retransmission of the same message type, i. Mobile reachable. Network dependent, but typically paging is halted on 1st expiry if the UE is not attached for emergency bearer services.

Implicitly detach the UE which is attached for emergency bearer services. Implicitly detach the UE on 1st expiry. Exceptions are described in the corresponding procedure description.

If ISR is activated, t he default value of this timer is 4 minutes greater than T Labels: EMM. No comments:. Newer Post Older Post Home. Subscribe to: Post Comments Atom. Default 12 min. At attach failure and the attempt counter is equal to 5.

Initiation of the attach procedure or TAU procedure. Default 54 min. Abort the procedure. Signalling connection released Bearers have been set up. Network dependent. T3 4 Default 4 min greater than T NAS signalling connection established.

Implicit detach timer. NOTE 3.Solve This? Guess the Hindi Muhawara from the following whatsapp Emoticons?

attach failure in lte

A girl is blind, deaf, dumb and uneducated too. A boy loves her. How would he propose without touching her? Guess me who am I, I am the first on earth, the second in heaven Which Indian cricketer is known as "Brown Bradman"? A landmark decision by the US Supreme Court in was in favour of what appellant? If due to regional subscription restrictions or access restrictions e. The Maximum APN Restriction denotes the most stringent restriction as required by any already active bearer context.

If there are no already active bearer contexts, this value is set to the least restrictive type. If there is no conflict the request shall be allowed, otherwise the request shall be rejected with sending an appropriate error cause to the UE. Connect to us. Similar Questions. Hot Network Questions. Your comment on this post: Email me at this address if a comment is added after mine: Email me if a comment is added after mine Privacy: Your email address will only be used for sending these notifications.

To avoid this verification in future, please log in or register. Your comment on this answer: Email me at this address if a comment is added after mine: Email me if a comment is added after mine Privacy: Your email address will only be used for sending these notifications. Your answer. Privacy: Your email address will only be used for sending these notifications. What may be possible reasons to reject the tracking area update request for an UE in a lte network? If yes, then what are all possible scenarios in the network which causes to do so?

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