SON-Self Organizing Network

The vision of self-organizing networks (SON) is that future radio access networks needs to be easier to plan, configure, manage, optimize and heal. This vision is in line with the views of 3GPP (3rd Generation Partnership Project) and the NGMN (Next Generation Mobile Networks) group.Ideally it means that just add …

How SMS works in LTE

SMS stands for short message service.The “short” part refers to the maximum size of the text messages: 160 characters (letters, numbers or symbols in the Latin alphabet). For other alphabets, such as Chinese, the maximum SMS size is 70 characters. There are two ways to implement SMS in LTE. The ideal …

EPS – The Network Architecture

Nodes Description Evolved UTRAN The evolved RAN for LTE consists of a single node, i.e., the eNodeB (eNB) that interfaces with the UE.  The eNB hosts the PHYsical (PHY), Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Control Protocol (PDCP) layers that include the functionality of user-plane header-compression …

SC-FDMA -Single-carrier FDMA

Single-carrier FDMA (SC-FDMA) is a frequency-division multiple access scheme. It deals with the assignment of multiple users to a shared communication resource. SC-FDMA can be interpreted as a linearly precoded OFDMA scheme, in the sense that it has an additional DFT processing preceding the conventional OFDMA processing.SC-FDMA has drawn great …

Orthogonal Frequency-Division Multiple Access (OFDMA)

With Orthogonal Frequency-Division Multiple Access (OFDMA) muliple access is achieved by assigning subsets of sub-carriers to individual users. This allows simultaneous low data rate transmission from several users.OFDMA simultaneously supports multiple users by assigning them specific subchannels for intervals of time.So in short, Each terminal occupies a subset of sub-carriers …