E-UTRAN Node B, also known as Evolved Node B (abbreviated as eNodeB or eNB), is the element in

E-UTRA E-UTRA is the air interface of 3rd Generation Partnership Project ( 3GPP) Long Term Evolution (LTE) upgrade path for mobile networks. It is an acronym for Evolved Universal Mobile Telecommunications System ( UMTS) Terrestrial Radio Access, als ...

LTE LTE may refer to: Science and technology * LTE (telecommunication) (Long-Term Evolution), a telephone and mobile broadband standard ** LTE Advanced, an enhancement *** LTE Advanced Pro * Compaq LTE, a line of laptop computers produced by Compaq * ...

that is the evolution of the element

Node B {{Unreferenced, date=May 2019, bot=noref (GreenC bot) Node B is the telecommunications node in particular mobile communication networks, namely those that adhere to the UMTS standard. The Node B provides the connection between mobile phones (UEs) ...

UTRA The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the Int ...

UMTS The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the In ...

. It is the hardware that is connected to the mobile phone network that communicates directly wirelessly with mobile handsets ( UEs), like a

base transceiver station A base transceiver station (BTS) is a piece of equipment that facilitates wireless communication between user equipment (UE) and a network. UEs are devices like mobile phones (handsets), WLL phones, computers with wireless Internet connectivity, ...

(BTS) in GSM networks. Traditionally, a

has minimum functionality, and is controlled by a

Radio Network Controller The Radio Network Controller (RNC) is a governing element in the UMTS radio access network ( UTRAN) and is responsible for controlling the Node Bs that are connected to it. The RNC carries out radio resource management, some of the mobility manag ...

(RNC). However, with an eNB, there is no separate controller element. This simplifies the architecture and allows lower response times.

Differences between an evolved Node B and a Node B

Air interface

eNB uses the E-UTRA protocols

OFDMA Orthogonal frequency-division multiple access (OFDMA) is a multi-user version of the popular orthogonal frequency-division multiplexing (OFDM) digital modulation scheme. Multiple access is achieved in OFDMA by assigning subsets of subcarrier ...

(downlink) and

SC-FDMA Single-carrier FDMA (SC-FDMA) is a frequency-division multiple access scheme. It is also called linearly precoded OFDMA (LP-OFDMA). Like other multiple access schemes (TDMA, FDMA, CDMA, OFDMA), it deals with the assignment of multiple users to a ...

(uplink) on its LTE-Uu interface. By contrast, NodeB uses the

protocols

WCDMA The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the I ...

TD-SCDMA The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the In ...

on its

Uu interface The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the Int ...

Control functionality

eNB embeds its own control functionality, rather than using a RNC (Radio Network Controller) as does a Node B.

Network interfaces

eNB interfaces with the

System Architecture Evolution System Architecture Evolution (SAE) is the core network architecture of mobile communications protocol group 3GPP's LTE wireless communication standard. SAE is the evolution of the GPRS Core Network, but with a simplified architecture; an all-IP ...

(SAE) core (also known as

Evolved Packet Core System Architecture Evolution (SAE) is the core network architecture of mobile communications protocol group 3GPP's LTE wireless communication standard. SAE is the evolution of the GPRS Core Network, but with a simplified architecture; an all-IP ...

(EPC)) and other eNB as follows:3GPP TS 36.300 V11.0.0 (2011-12) * eNB uses the S1-AP protocol on the S1-MME interface with the

Mobility Management Entity System Architecture Evolution (SAE) is the core network architecture of mobile communications protocol group 3GPP's LTE wireless communication standard. SAE is the evolution of the GPRS Core Network, but with a simplified architecture; an all-IP ...

(MME) for control plane traffic.

References

External links

* {{cite web , title = LTE Application Notes , url = https://www.scribd.com/doc/222053099/49/eNodeB-and-Cell-parameters LTE (telecommunication) Telecommunications infrastructure