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LTE Advanced (LTE-A) Features

Category: 4G LTE, Telecom, Wireless
Author: gokhankosem, on 09 Jun 15 - 1 Comment
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LTE Advanced (LTE-A) Features



As you know after LTE, LTE-A (LTE Advanced) is the next step of mobile technology. In this article, I will try to explain this LTE-A (LTE Advanced) features basically.Let’s start ;)

CA (Carrier Aggregation)



Carrier Aggregation is the most important feature of 3GGP Release 10 LTE Advanced. With this feature, eNodeB schedules capacity from multiple cells to the User Equipment. By this way, hig data rates are reached.

LTE-A Carrier Aggregation

LTE-A Carrier Aggregation

Enhanced MIMO



In LTE for capacity expansion, MIMO(Multiple Input Multiple Output) feature is used. This is done via spatial multiplexing and multi-antenna techniques. In LTE-A, this feature enhanced.

In LTE, Single User and Multi User MIMO is supported for downlink (eNode B to UE). Only Multi User MIMO is supported for Uplink. And the capacity is up to 4x MIMO for downlink and 2x MIMO for uplink.

In LTE-A, for both downlink and uplink Single User and Multi User are supported. And the MIMO capacities are increased 8x MIMO in the downlink and 4x MIMO in the uplink.

LTE-A MIMO

LTE-A MIMO.jpg

LTE Relay Nodes



With LTE Relay nodes, the signals from the eNodeB is repeated and this provides the coverage of the uncovered parts because of large buildings, hills etc…

LTE-A Relay Node

LTE-A Relay Node

Relay Node deployment is done in two ways. Type 1 and Type 2. Type 1 is the non-transparent mode. In this mode the relay node transmits both signalling and user traffic. Type 2 is the transparent mode. In this type only user traffic is transmitted by relay node. EnodeB is responsible for signalling.

LTE-A Relay Node Types

LTE-A Relay Node Types

LIPA (Local IP Address)



LIPA (Local IP Address) is the feature that provides UE to reach its Local Area Network resources outside the office or home. With this, local devices, printers etc. can be used from outside. The normal traffic is goes to the operator network via IPSec. For Local IP Access the traffic is routed to the User Local Area Network.

LTE-A LIPA(Local IP Address)

LTE-A LIPA(Local IP Address)

SIPTO (Selective IP Traffic Offload)



SIPTO (Selective IP Traffic Offload) provides to use local EPS Gateways (S-GW and PDN-GW) to reduce the load of core network. With this feature, certain PDN connections is done over geographically local EPS Gateways.

LTE-A SIPTO (Selective IP Traffic Offload)

LTE-A SIPTO (Selective IP Traffic Offload)

Other Additional Features



IP Flow Mobility: With better IP Flow Mobility, provice simple and effective handover between networks.

Multi-Access PDN Connectivity: With this feature, separate but simultaneous PDN connectivity can be achieved. One over LTE cell, other EDGE, etc.

Managed Remote Access: Giving own LAN access to the UE and allow user to access their resource remotely.

ANDSF : Access Network Discovery Selection Function guides the roaming UEs to non-3GPP access network.

In this article, we have talked about LTE-Advanced. I hope this article will be helpful for you. Keep on ipcisco.com ;)

You can also read 4G LTE (Long Term Evolution) article.

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About the Author
Gokhan Kosem is a telecommunation and network engineer. His ambition to IP networks and end-to-end system installation made him to prepare this web-site. By sharing his experiences about various networking protocols beside different system installation experiences and Cisco, Juniper, Alcatel-Lucent devices configurations, he is aimed to be helpful for his collegues in all over the world. He is currently lives in Istanbul, Turkey.

One comment for “LTE Advanced (LTE-A) Features”

1
Lord Anertei Tetteh

Please I want to have my Ph.D.programme in networking and telecommunications systems can you offer me some advice on my research area?
Thank you

January 17th, 2016 at 18:17

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