The LTE related core network evolution is referred to as Evolved Packet Core (EPC). LTE architecture is based on the system architecture evolution (SAE) model defined by the 3G Partnership Project (3GPP). EPC consists of the following network elements: Mobility Management Entity The Mobility Management Entity (MME) is the LTE mobility management and session management … Read more
LTE RAN provides the physical radio link between the User Equipment (UE) and the Evolved Packet Core (EPC) network. LTE RAN comprises eNodeBs. The eNodeB contains Transmit Receive Duplex Units (TRDUs) or Remote Radio Heads (RRHs) and communicates with the UEs. The eNodeB supports Multiple Input Multiple Output (MIMO). The LTE RAN – eNodeB provides: … Read more
LTE – eNodeB, MME and SAE Function in Short Here I write in short about eNodeB functions, Mobile Management Entity (MME) functions and System Architecture Evolution (SAE) functions. LTE (Long-Term Evolution) represents a significant advancement in wireless communication technology, with key components such as the eNodeB (evolved NodeB), MME (Mobility Management Entity), and SAE (System … Read more
Here i write current LTE Features and benefits of LTE in small point note which will short description of LTE technology. Current LTE version features The following are the features of LTE Technology: Spectral efficiency (5 bps/Hz DL, 2.5 bps/Hz UL), user throughput (up to 100 Mbps) in LTE, latency (10 ms UE-eNodeB), cell edge … Read more
SRNC and DRNC are concepts for a connected UE. The SRNC handles the connection to one UE, and may borrow radio resources of a certain cell from the DRNC. Drift RNCs support the Serving RNC by providing radio resources A UE in connection state has at least one and only one SRNC, but can has … Read more
The 3G Iub interface is the terrestrial interface between NodeB and RNC. The Radio Network Layer defines procedures related to the operation of the WCDMA NodeB. The Transport Network Layer defines procedures for establishing physical connections between the 3G NodeB and the 3G RNC. The 3G Iub application protocol, WCDMA NodeB application part (NBAP) initiates … Read more
Here I write about Iu PS Interface in WCDMA. WCDMA Protocol Structure for Iu PS The Iu PS protocol structure is represented in below image. Again, a common ATM transport is applied for both User and Control Plane. Also the physical layer is as specified for wcdma Iu CS. WCDMA Iu PS Control Plane Protocol … Read more
WCDMA Protocol Structure for Iu CS The WCDMA Iu CS overall protocol structure is depicted in below image. The three planes in the Iu interface share a common ATM (Asynchronous Transfer Mode) transport which is used for all planes. The physical layer is the interface to the physical medium: optical fiber, radio link or copper … Read more
The structure is based on the principle that the layers and planes are logically independent of each other. Protocol structures in UTRAN terrestrial interfaces are designed according to the same general protocol model. This model is shown in below. The structure is based on the principle that the layers and planes are logically independent of … Read more
WDMA Air interface or Uu Interface contains 3 layers which describe as follow, The WCDMA layer 1 supports all functions required for the transmission of bit streams on the physical medium. It is also in charge of measurements function consisting in indicating to higher layers, for example, WCDMA Frame Error Rate (FER), WCDMA Signal to … Read more