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Radio Protocol Architecture in LTE

Radio Protocol Architecture in LTE The EUTRAN radio protocol model specifies the protocols terminated between UE and eNB. The protocol stack follows the standard guidelines for radio protocol architectures (ITU-R M1035) and is thus quite similar to the WCDMA protocol stack of UMTS. The protocol stack defines three layers: the physical layer (layer 1), data … Read more

Different Tasks and States of RRC Protocol in LTE-EUTRAN

Different Tasks and States of RRC Protocol in LTE-EUTRAN The RRC protocol for EUTRAN is responsible for the basic configuration of the radio protocol stack. But one should note, that some radio management functions (scheduling, physical resource assignment for physical channels) are handled by layer 1 and layer 2 autonomously. MAC and layer 1 signaling … Read more

E-UTRAN (Evolved Universal Terrestrial Radio Access Network)

E-UTRAN (Evolved Universal Terrestrial Radio Access Network) E-UTRAN, or Evolved Universal Terrestrial Radio Access Network, is the radio access network component of the LTE (Long-Term Evolution) architecture. It plays a central role in providing high-speed wireless communication for mobile devices. Here’s a brief summary of E-UTRAN: Evolved NodeB (eNB): The fundamental building block of E-UTRAN … Read more

Intra E-UTRAN Handover in LTE

The UE is RRC connected. During the HO: The radio link is released from the eNodeB 1 and re-established on the eNodeB 2 The Control plane is switched to the eNodeB 2 and the MME The User plane is switched to the eNodeB 2 and the S-GW The Intra-e-UTRAN-Access Mobility Support for UEs in ECM-CONNECTED … Read more

How Time structure in LTE?

EUTRAN OFDM symbols have a basic duration of 66.667 ?s. This means up to 2048 complex samples per OFDM symbol in time domain representation. A cyclic prefix is pretended to the symbol. The size of the cyclic prefix can be chosen from three options: Normal prefix for 15 kHz: This is the standard option. It … Read more

How UTRAN Terrestrial Interface Protocol Mode – UTRAN layers and planes

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

Closed Loop Mode Transmit Diversity in UMTS

UMTS Closed Loop Mode Transmit Diversity Used in DPCH and HS-PDSCH. The closed-loop-mode transmit diversity can only be applied to the UMTS downlink channel if there is an associated UMTS uplink channel. Thus this mode can only be used with UMTS dedicated channels. The chief operating principle of the closed loop mode is that the … Read more

UE information transfer and RRC connection Aspects in LTE

Means for transmitting UE In order to avoid signaling of the radio access capability of the UE via an air interface at each transition from RRC_IDLE to RRC_CONNECTED, the core network stores AS capabilities (such as E-UTRA and the possibility GERAN), while the UE is in the RRC_IDLE / EMM-registered. After the connection S1, the … Read more

How Measurement Configuration in EUTRAN

The E-UTRAN can configure the UE to report measurement information to support the control of UE mobility. The following measurement configuration elements can be signaled via the RRC Connection Reconfiguration message. E-UTRAN may configure the UE to report measurement information to support the control elements mobility. Following measurement configuration message can be supplied via the … Read more

3GPP Services Classification and EUTRAN Capacity Limiting Factors

Here I write on 3GPP Services Classification and EUTRAN Capacity Limiting Factors for LTE. 3GPP Services Classification Being a data centric technology, LTE has well defined classifications for Quality of Service. In general, there are two main classes of service type, with Guaranteed Bit rate vs with Non Guaranteed Bit rate. RT (Real Time) services … Read more