The 3G technology that can be enjoyed now not created in a conjuror. Let us know the pros and cons of technology. 3G networks like WCDMA and CDMA 2000 networks structure complex and involves a large number of protocols to cover the entire system. Therefore, access networks 4th generation (4G) are expected to have a simpler structure is entirely based on Internet protocol (all-IP). It is based on IP, all packet traffic in the access network and backbone network is uniform, without the need to convert one protocol to another protocol.

Most 3G networks are essentially built on a circuit switched network cell, where they have their own doors to translate the IP packet backbone network. 3G networks also have a protocol and its own interface to communicate. It’s a separate issue in terms of interoperability. Therefore, to overcome these problems, 4G network is designed as an all IP-based network packet switching, and IP-based networks such as the backbone of an internal network (LAN, WLAN) and Internet.

4G

In developing the design, 4G network has a different vision 2. The first is that the Revolutionary 4G network (4G-R), who developed an innovative system. The second is a vision of Pathology (4G-E), here’s a 4G network interworking capabilities of network systems for it. Interworking Model integrated cellular networks, wireless metropolitan area networks (wireless metropolitan area networks – WMAN), a wireless LAN (local wireless local area networks WLAN) and personal nirkable network (wireless personal area networks – WPAN). Interworking model is to cover future network scenarios are integrated in which each person can access the network anytime, anywhere and in any way.

4G-R

IEEE 802.11 WLAN is a system that has achieved performance up to 54 Mbps, but still limited to the service area which only reaches a few hundred meters (200 to 300 meters). Moreover, the existing cellular networks (such as CDMA2000 1x EV-DO) can cover several kilometers and services, but the cell performance reaches only 2Mbps. On this basis, it is essential to develop an innovative system that has high performance and a wide range of services.

This innovative new 4G system using different techniques of its predecessor, such as multiplexing using orthogonal frequency division / multiple access () and antenna systems and multiple input multiple output OFDM / OFDMA (MIMO). To support a variety of conditions, such as user mobility, whether in motion at high speed or low speed, type of traffic (data or voice), or the coverage limits, then combining dikembangkanlah multiple access techniques by various (hybrid multiple access).

The stronger candidate 4G network technology based on IEEE 802.16 and ETSI / HiperMAN, known as the WiMAX network. This network standard being developed, the first of which is only compatible with the topology of 802.16 access points to the line of multiple viewpoints (PMP – LOS), 802.16d mesh topology that does not support the line of sight (NLOS-mesh), which supports the 802.16e mobility, until it is still running, 802.16j that supports multi-hop mobile media (mobile multihop relay-MMR), and advanced water interface 802.16m which allows the data rate 100 Mb / s for mobile applications and 1 Gbit / s to exit the application, in accordance with the requirements of IMT-Advanced. The development of this innovative 4G networks, especially in the layer media access control and physical layer.

4G-E

While the standard water interface for 4G-R is still in development and breaches of standards and conformance through the WiMAX forum, an opportunity to 4G-E highly open to market, especially for the incumbent. Standard IP-Media Subsystem (IMS) can bridge both mengkonvergensikan different network technologies, so that the operator with the latest GSM / GPRS networks / EDGE, UMTS/3G and traditional PSTN systems to migrate and can offer services 4G with interoperability between systems is guaranteed.

IMS

IP Multimedia Subsystem (IMS) is a new framework in the field of telecommunications. IMS was originally set for mobile networks to support IP-based telecommunications services. IMS was first introduced by the Third Generation Partnership Project (3GPP) through two stages of development (Release 5 and Release 6) for Universal Mobile Telecommunications System network (UMTS). Moreover, an IP multimedia environment also launched by 3GPP2 as the domain of Multi Media Card (MMD) for 3G CDMA2000 networks. At the end of diharmonisasika IMS framework, it becomes what is happening today. Standard IP Multimedia Subsystem (IMS) defines a basic architecture of a network that supports voice over IP (VoIP) and other multimedia. In addition, the 3GPP/3GPP2 IMS standard is fully adopted by the ETSI standards body ETSI / TISPAN.

From here we can see how the Telecommunications Standards body 2 of the most influential in the world compete for the development of 4G technologies. IEEE 4G-R, first and ETSI in the 4G-E on the other side.

From the user side, a person of IMS enables communication service-to-person and person-to-content in various media, including voice, text, images and video, or a combination, in a very personal and controlled.

The operators, IMS provides an important advance in the concept of layered architecture by defining a horizontal architecture, where service enablers and common functions can be reused for different applications. This is a significant advance in the concept of layers for data communications. Landscape architecture in IMS also specifies interoperability and roaming capabilities, while providing control to the carrier, charges (load) and safety. And above all, can be integrated with voice and data networks through the adoption of the current benefits of the IT domain.

With the ability to offer IMS became a bridge for the convergence of mobile networks and the network did not move. For this reason, IMS can be a solution for mobile network operators and did not move to develop a multimedia business and provide value added services. The integration of different media the opportunity to offer various communication services that are much richer than the services already available today.

Despite reducing the use of circuit switched networks, IMS is not a goal, with mungkinnya voice services through packet switching, many parties are predicting that the circuit switched service tereduksinya a matter of time. However, with the ability to network interworking with circuit-switched PSTN and PLMN, this at least extend the life of the circuit-switched networks.

With the devices entirely based on software, making great opportunities and challenges for us to develop the IMS as one of the national telecommunications products.