Wireless Communication Network Learning Four (20141211)

today, let's elaborate on the evolution of GSM,TD to LTE :

Let's take a look at the next evolution:

2G,3G network in the architecture has four physical devices, LTE in the network architecture only eNodeB and access gate two physical devices, removed the original 3G network support circuit switching (circuit-switch) function, transform the IP routing network of the packet, The complexity of the core network is greatly simplified;

The hosting service architecture meets the diverse QoS requirements:

First, let's look at the hosting service architecture diagram for this end-to-end service:

Because LTE networks have the ability to meet a wide variety of network requirements with a single network architecture, operators must be able to define different service qualities for different services, and the LTE network also defines the hosting service architecture for end-to-end services (end-to-end service) (Bearer Service Architecture) to meet the needs of QoS;

EPS bearer Business Architecture continues to follow the common mobile Communication System (UMTS) network similar to the hierarchical, sub-regional QoS architecture, each layer of the bearer business is provided by the next layer of bearer services;

End-to-end bearer services are divided into EPS bearer services and external bearer services:

The external Bearer service undertakes to connect the UMTS core network and is located in the external network node between the business bearer;

EPS bearer service is divided into EPS wireless bearer service and EPS access bearer service;

EPS wireless bearer service can realize the transmission of EPS-hosted business data unit between ENODEB and UE according to the QoS of the request, and provide the functions of IP header compression, user plane encryption and so on, and no UE provides mapping and multiplexing information;

EPS access bearer service is based on the QoS of the request, realizes the transmission of the EPS bearer Service data unit between Mme and eNodeB, and provides the QoS guarantee for endpoint IP traffic aggregation;

4G Features Multifunctional/flat

To meet the multiple services of the next Generation network with a single network architecture, LTE and SAE have made a lot of improvements in network structure design by flattening them into carriers, while simplifying the hardware to two units of base station and access ramp, and a single network architecture helps operators to provide multiple services.

OK, I believe you, like me, now have a certain understanding of the entire LTE architecture. The next issue begins with some key technologies for LTE networks.

Statement : The above four articles are referred to a web blog, and then the summary. Post Address: http://www.2cm.com.tw/technologyshow_content.asp?sn=0909030005

Wireless Communication Network Learning Four (20141211)