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LTE QoS (Part 3) - P2P Traffic BW Control using the LTE QoS

In the last two posts (Part 1, Part 2), we learned about LTE QoS. Now, we will show you an example of controlling P2P traffic using the LTE QoS in the LTE network. Let's say there is a network operator named "NMC Telecom", and it offers a service plan with the following features: No bandwidth limitation for Internet usage Data rate limitation (512 Kbps for download, and 128 Kbps fo...

10/25/2013

54,074

Tech-Blog

Eleven EMM Cases in an EMM Scenario (Presentation version)

10/22/2013

23,663

Technical Documents

Eleven EMM Cases in an EMM Scenario

Table of Contents 1. Introduction 2. EPS Mobility Management (EMM) Scenario 3. Closing 1. Introduction This document and its subsequent documents will provide descriptions of specific EMM procedures based on our understanding of EMM and ECM/RRC states covered in our LTE technical document, “LTE EMM and ECM States” [1]. EMM features are explained in...

10/22/2013

88,099

Technical Documents

LTE QoS (Part 2) - LTE QoS Parameters (QCI, ARP, GBR, MBR and AMBR)

We will look a little bit further into LTE QoS that we discussed last time, and learn what QoS parameters are for. There are two types of EPS bearers: default and dedicated. In the LTE network, the EPS bearer QoS is controlled using the following LTE QoS parameters: ▶ Resource Type: GBR or Non-GBR ▶ QoS Parameters QCI ARP GBR MBR APN-AMBR UE-AMBR Every EPS bearer must...

10/15/2013

343,189

Tech-Blog

LTE QoS (Part 1) - EPS Bearers and SDF

We will talk about LTE QoS this time. QoS functions provided by any network, whether wired or wireless, are all based on standards (IETF RFC, IEEE 802, 3GPP TS, etc.). They may work differently using different standards depending on whether the network is wired (Ethernet/IP/MPLS) or wireless (LTE/WiBro/Wi-Fi). But, basically what the QoS is about is that traffic quality is guaranteed (i) if...

10/01/2013

75,312

Tech-Blog

LTE GTP Tunnel (2): Today, we will find more about LTE GTP tunnels that we have discuss...

Today, we will find more about LTE GTP tunnels that we have discussed previously. In the Figure below, GTP tunnels are established in the link from the eNB to the S-GW and from the S-GW to the P-GW. Downlink (DL): From PDN (Internet) to UE [1] A packet (Source IP=www.google.com, Destination IP=UE) is sent from the Internet to the P-GW. [2] The P-GW compares the five tuples of...

09/26/2013

51,212

Tech-Blog

Summary of SK Telecom's Mobile IPTV Live Streaming (Full HD/HD/SD over LTE-A)

SK Telecom, the Korean No. 1 telecom operator, launched Btv Mobile service (in SD/HD) offering a variety of live broadcasting and VoD contents for mobile devices in around July 2012. And a year later in July 2013, boosted by the commercialization of LTE-A, it began a "Full HD" streaming service with drastically enhanced video quality. The following is the press release by SK Telecom about its n...

09/24/2013

73,789

Tech-Blog

Analysis of SK Telecom's Mobile IPTV Live Streaming (Full HD, HD and SD over LTE-A)

09/24/2013

72,729

Technical Documents

LTE EMM and ECM States (Presentation version)

09/20/2013

31,550

Technical Documents

LTE EMM and ECM States

Table of Contents 1. Introduction 2. EMM, ECM and RRC States 3. EMM State Transition 4. EMM Features 5. EMM User Information 6. Closing 1. Introduction Through the previous technical documents, we have studied the LTE network architecture and LTE identifications, the fundamentals of LTE technology, and LTE security operation required for a user to...

09/20/2013

265,896

Technical Documents

LTE GTP Tunnel (1): Today, we will talk about GTP tunnels used in the LTE network

Today, we will talk about GTP tunnels used in the LTE network. As seen in Figure (a) below, IP packets sent by an LTE device (UE) are delivered from an eNB to a P-GW through GTP tunnels. What it means is that "all IP packets that a UE sends are always delivered through an eNB to a P-GW regardless of their specified destination IP addresses (i.e., even though their destination IP addresses a...

09/12/2013

68,177

Tech-Blog

LTE QoS: SDF and EPS Bearer QoS (Presentation version)

09/11/2013

34,123

Technical Documents

LTE QoS: SDF and EPS Bearer QoS

Table of Contents 1. Introduction 2. SDF and EPS Bearer 3. QoS Parameters of SDF and EPS Bearer 4. QoS Provisioning and Enforcement 5. An Example for SDF and EPS Bearer QoS 6. Closing 1. Introduction An LTE service provider should be able to make services with different QoS requirements available to its users with different subscription levels. So,...

09/11/2013

329,487

Technical Documents

LTE: Tracking Area (TA) and Tracking Area Update (TAU)

This time we will give you a brief overview of an LTE Tracking Area (TA) and Tracking Area Update (TAU). While an LTE device (UE) is in active state (i.e. while communicating, or while in EMM-Registered/ECM-Connected/RRC-Connected state in LTE terms), its location is known by the LTE network at cell level (i.e. on a cell granularity), e.g. in cell2 in eNB1. However, while the UE is in idle...

08/30/2013

225,788

Tech-Blog

LTE Identification III: EPS Session/Bearer Identifiers

Table of Contents 1. Introduction 2. EPS Session and EPS Bearer: Overview 3. Identifiers for EPS Session/Bearer (Session/Bearer IDs) 4. Summary: Table of LTE Identifiers 5. Closing and References 1. Introduction We have learned about the LTE ID groups such as UE and ME IDs, and Network Equipment (NE) and UE location identifier (location) IDs in LTE Iden...

08/26/2013

228,547

Technical Documents

LTE Identification II: NE and Location Identifiers

Table of Contents 1. Introduction 2. Identifiers for Network Equipment (NE IDs) 3. Identifiers for User Location (Location IDs) 4. Closing and References 1. Introduction In the previous document, “Part I, LTE Identification I” [1], identifications of UE and ME have been described. This document (Part II, LTE Identification II), as the second...

08/26/2013

113,318

Technical Documents

LTE Identification I: UE and ME Identifiers

Table of Contents 1. Introduction 2. Classification of LTE Identification 3. Identifiers for User Equipment (UEI IDs) 4. Identifiers for Mobile Equipement (ME IDs) 5. Closing and References 1. Introduction In LTE network, different IDs are used to identify each entity depending on their relationship with other IDs just like different names and titles ar...

08/20/2013

159,670

Technical Documents

Analysis on Streaming Technology of LG U+ Mobile HDTV (LG U+ HDTV Service based on LTE-A)

On June 10, 2013, LG U+ launched U+ HDTV multi-channel service (U+ tv G 4 Channel Service) that enables users to watch 4 channels at the same time through home STB. Later in July, it introduced the same multi-channel service in a mobile version based on LTE-A. In this post, we will analyze the U+ HDTV streaming on mobile devices that support LTE-A. U+ HDTV service offers two viewing experi...

08/19/2013

66,866

Tech-Blog

Network Architecture for LTE and Wi-Fi Interworking

08/16/2013

53,836

Technical Documents

LTE Security II: NAS and AS Security (Presentation version)

08/05/2013

23,633

Technical Documents

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