Lte base station software architecture

In this paper base station architecture evolution towards full software defined radio technologies is analyzed. The first one above shows the endc control c plane. Aug 31, 2018 as the mobile industry prepares for the introduction of 5g services, we have seen significant investment in components to implement 5g lte macro and small base stations, centralized and cloud radio access networks crans, remote radio heads rrh, customer premises equipment cpe and handset modems, and internet of things iot systems. The open base station architecture initiative obsai was a trade association created by hyundai, lg electronics, nokia, samsung and zte in september 2002 with the aim of creating an open market for cellular network base stations. Vanchinathan venkataramani, aditi kulkarni, tulika mitra, lishiuan peh. Mobile network operators choose self organizing network son concept as a costeffective method to deploy lte 4g networks and meet user expectations for high quality of service and bandwidth. Oai is based on a pc hosted software radio frontend architecture. Saes main component is the evolved packet core, also known as an epc. An example of an hcn made up of a single macro base station and several pico and femto base stations. Lte is mainly designed for high speed data applications both in the uplink and downlink.

This architecture is open to innovation by anybody, allowing the development of new applications. Envelope tracking in base stations requires the high speed, high power, and high voltages that are only available using gan technology. The hope was that an open market would reduce the development effort and costs traditionally associated with creating base station products. The enodeb enb called openairinterface5g the evolved packet core epc called openaircn figure 1 shows the lte functional elements included in each project. Download scientific diagram resilient 4glte architecture, software.

The design challenge to create a network architecture capable of supporting such flexibility whilst meeting differentiated access demands is a brave endeavor to satisfy. Each base station can, for example, stream videos to a subset of users 2. In addition, gnu radio applications are available for downlink transmit and receive to. The evolved umts terrestrial radio access network eutran. Open source sdr lte software suite from software radio systems srs. Evolutionary analysis of gsm, umts and lte mobile network. These base stations can be configured as the following ne types.

One of the most compact outdoor macro base stations in the industry, the bts3900a features a large, scalable capacity and multimode applications that. The lte base station evolved node b connects to the epc via. According to different service requirements, fiberoptic cable availability and network resource allocations, ran real time and nonreal time resources can be deployed on the site or on the access cloud side. The baicells spectra is outdoor lte fdd base station that works on unlicensed 5. But before we jump into the architecture we need to understand what gave rise to the need of lte. All, 10g, 30th anniversary, ai, cable information architecture, consumer, culture. In contrast to 2g and 3g networks, which separates voice and data networks, all media are transmitted as ip packets in an lte network. Outdoor lte infrastructure equipment enodeb fujitsu. Ues are devices like mobile phones handsets, wll phones, computers with wireless internet connectivity. The network can be that of any of the wireless communication technologies like gsm, cdma, wireless local loop, wifi, wimax or other wide area network technology.

Its basis stands in the gsmedge and umtshspa network technologies, with. Bts is also referred to as the node b or, simply, the base station. Under this new agreement, nec says it will ensure 5g compatibility through software upgrades and a minimal replacement of hardware to maximize the use of existing base station equipment, operating in a mixed environment with lte and lte advanced base stations. Base station system structure wireless innovation forum.

It is hoped that the model can also be the basis for standardization of base station components. Telecom service providers install base station to provide cellular mobile and internet services to the wireless mobile and internet users across the globe. Towards building cloudnative radio access network using. Modular advancedmc platform for broadbandlte base stations.

A usim stores userspecific data very similar to 3g sim card. Lte architecture basics 4g introduction this is the first part of the series lte architecture. The singleran base stations can be classified into separatempt base stations, compt base stations, and singlemode base stations based on function deployment. Flexran see figure 4 is a reference architecture developed by intel to implement software based radio stations which can sit on any part of the wireless networks from edge to core. Lte mobile communicates with just one base station and one cell at a time and there are following two main functions supported by enb. Outdoor macro base station bts3900a huawei products.

A software defined predictable manycore architecture for lte baseband processing. First the software architecture can be extended to handle more than one component carrier two is a sufficient number for high datarate. The highlevel network architecture of lte is comprised of following three main components. Our lte bs solutions uses latest lte technology with transmit powers up to 4x 40w for high capacity, long range networking, and uses software defined radio. The lte system software comes from an open source project called open air interface oai. The dl is composed of physical channels that convey. The network can be that of any of the wireless communication technologies like gsm, cdma, wireless. Support multiple network modes due to their cuttingedge modular design.

The time domain is split into frames lasting 10 ms, and. Find out inside pcmags comprehensive tech and computerrelated encyclopedia. A competitive analysis as the mobile industry prepares for the introduction of 5g services, we have seen significant investment in components to implement 5g lte macro and small base stations, centralized and cloud radio access networks crans, remote radio heads rrh, customer premises equipment cpe and handset modems, and internet of. With this aim in mind, huawei developed new generation base stations, which are designed based on a highperformance platform and use an optimized hardware and software architecture. Those of you familiar with lte will immediately recognize the lte core network control node, the mme mobility management entity. The above table lists all products of huawei base stations.

A competitive analysis as the mobile industry prepares for the introduction of 5g services, we have seen significant investment in components to implement 5g lte macro and small base stations, centralized and cloud radio access networks crans, remote radio heads rrh, customer premises equipment cpe and handset modems, and. Orthogonal frequency division multiplexing ofdm is the selected modulation. The architecture proposed allows easy migration to the next generation socs as well as to more powerful socs of the same generation. Ive been studying lte since about 20, but the last couple of months building and configuring lte components in the. Openlte is an open source implementation of the 3gpp lte specifications. Open base station architecture initiative wikipedia. The mme exclusively communicates to the lte base station, the enodeb enb, and is not concerned at all with the 5g base station, the gnb. Evolution lte wireless base station equipment, which makes it. As the mobile industry prepares for the introduction of 5g services, we have seen significant investment in components to implement 5g lte macro and small base stations, centralized and cloud radio access networks crans, remote radio heads rrh, customer premises equipment cpe and handset modems, and internet of things iot systems. A new generation of long term evolution lte base stations 3g long term evolution 3g lte is an advanced standard from the 3rd generation partnership project 3gpp at. Forwardlooking socbased phy architecture for macro and. Outdoor macro base station bts3900a this outdoor macro base station supports both gsmr and lte the ideal solution for railways that want to prepare for evolution to an lte broadband network. Sep 05, 2017 the presentation will outline the kpis and key optimizations at the platform, nfvi and stack level in implementing wireless base station stack and telco edge cloud on intel architecture.

With a scalable architecture, using anokiwave ics, oems can. It can be used to build and customize a lte base station oai enb, a user equipment oai. Broadband portable infrastructure motorola solutions. It addresses the performance attributes of the lte radio and system architecture and how the global lte ecosystem makes it. It describes the role of the enodeb in the network and key concepts such as. Lte tutorial tutorial on lte basics rf wireless world. Lte long term evolution lwa lte wifi aggregation mac media access control. The family of integrated transceivers discussed in this article are the industrys first to support all existing cellular standards, 2g to 5g, and cover the full sub6 ghz tuning range. On the impact of rogue base stations in 4glte self. Lte architecture including role of the enodeb in the network and key concepts.

The case tested here is the implementation of the downlink dl physical layer phy of an lte enodeb base station. With a cheap and fully open source lte network we can explore novel use. For details about the 3900 series base stations, see descriptions about base station basics 2. Software defined mobility management and base station control for green cellular networks a dissertation in telecommunications and computer networking and electrical and computer engineering. The radio protocol architecture for lte can be separated into control plane architecture and user plane architecture as shown below. For details about the micro base stations, see descriptions about each singlemode base station gsm base station basics, nodeb basics, enodebfdd basics, enodebtdd basics, gnodeb basics and micro base station basics. A base station can run gsm at first, and can be later software upgradeable to lte, running multiple air interface protocols using the same radio, at the same time. A base transceiver station is a piece of equipment that facilitates wireless communication between user equipment and a network. The lte system software comes from an open source project called open air. In telecommunication, longterm evolution lte is a standard for wireless broadband communication for mobile devices and data terminals, based on the gsm edge and umts hspa technologies. After the compt base station is introduced in singleran8. Lte standard has been published by 3gpp as an extension of umtsbased on 3gpp standard and 1xevdo base on 3gpp2 standard technologies.

Softwaredefined mobility management and base station control for green cellular networks a dissertation in telecommunications and computer networking and electrical and computer engineering presented to the faculty of the university of missouri kansas city in partial ful. A plug and play radio test equipment it comes preinstalled with the following software components. The yateucn software defined core implements all the functions and protocols of the lte core network in software, and uses commodity hardware. Forwardlooking socbased phy architecture for macro and small. Keywords timepredictable architecture, lte, 5g, base band processing, manycores, lowpower acm reference format. Each lte base station is allocated a frequency band between 1. A base station can use the 850, 900, 1800, and 1900 mhz bands for both gsm and lte, meaning that it will allocate two arfcn to gsm and will use the remaining spectrum for lte. It increases the capacity and speed using a different radio interface together with core network improvements. A standard lte system architecture consists of an evolved umts terrestrial radio access network, more commonly known as eutran, and the system architecture evolution, also known as sae. This keeps information about the users phone number, home network identity and security keys etc. Lte is continuously evolving with lte advanced and lte advanced pro providing for major building blocks for. In the diagram, the base stations have slightly different names.

A base transceiver station bts is a piece of equipment that facilitates wireless communication between user equipment ue and a network. Since it works in standalone mode, it doesnt require a licensed band to build a network. Different software implementations of the lte base station, which is referred to as. In addition to the great learnings that came from my efforts, we cablelabs have ended up with a great tool for research and experimentation. Yateucn unified core network for epcims and gsmgprs. With a cheap and fully open source lte network we can explore novel use cases, configurations, and deployment architectures, without the need for outside collaboration. The bss consist of base station controllers bsc and the base transceiver stations bts. From a spectrum point of view, as seen in the image below, the mixed gsm lte technology enables a base station to be software configurable for up to 4trxarfcn. With this continued strong evolution lte steadily paves the way for 5g while reusing the installed base.

Image courtesy of reference 2 extension of lte into the unlicensed spectrum and moves lte towards such things as devicetodevice functionality, broadcast tv. Resilient 4glte architecture, software elements and interfaces. Currently, octave code is available for test and simulation of downlink transmit and receive functionality and uplink prach transmit and receive functionality. All the physical layer and protocol layer processing is done in real time inside the pc, so no dedicated hardware is necessary. The tutorial on lte also covers lte protocol stack, lte physical layer, lte network architecture and so on. We propose spectrum, a predictable software defined manycore architecture that exploits the massive parallelism of the lte baseband processing. Traditional 4g lte base stations contain one, two or possibly even four transmitters and usually operate on core band frequencies of up to 2. Base station subsytem bss the bss which is also known as the radio network or the radio subsystem manages all the radio transmission paths between the mobile stations ms and other subsystems in the gsm architecture sauter, 2011. This paper describes an efficient, forwardlooking architecture that enables handling of various form factors of lte base stations with minimal software. The base station sits at the heart of the network platform. The evolved packet core communicates with packet data networks in the outside world such as the internet.

This paper describes an efficient, forwardlooking architecture that enables handling of various form factors of lte base stations with minimal software modification and without architecture changes. At user plane side, the application creates data packets that are processed by protocols such as tcp, udp and ip, while in the control plane, the radio resource control rrc protocol writes the signalling messages that are exchanged between the base station and the mobile. Standardizing a new paradigm in base station architecture. While from the operators perspective such architecture have to meet the. Lte 4g ran architecture eumts introduction in previous generations, the base stations were controlled by a central device. Huawei base stations basicslets get startwireless network. Lte base station manufacturers lte enodeb equipment. Our lte bs solutions uses latest lte technology with transmit powers up to 4x 40w for high capacity, long range networking, and uses software defined radio technology with easy upgrade to new features and high capacities. In lte technology base station is referred as enodeb.

The yateucn is a unified core network solution intended for new lte networks, for upgrading gsmgprs networks to lte or for extending existing lte networks. This do cumen t description focuses on the ma cro base stations and lampsite. Wireless base stations, like most network nodes, have traditionally been vertically integrated boxes. Lte architecture, lte system architecture, lte components this page offers information about long term evolution lte, its architecture and components.

Lte nr base station software introduction lteenb allows to build a real 4g lte 5g nr base station called an enodeb 4g or gnodeb 5g using a standard pc and a low cost software radio frontend. The new base station architecture offered by these transceivers allows base station designers more choices and ways to differentiate their product. For an lte advanced implementation on a 3rd generation soc 5 3, the architecture in section v can be extended easily. Mudge eecs department, university of michigan, ann arbor yschool of ecee, arizona state university, tempe abstract due to the rapid growth of mobile communication, wireless. Distributed base stations enable radio access for small to large elte wireless private networks that provide services such as video surveillance, data acquisition, and data transmission. Ues are devices like mobile phones, wll phones, computers with wireless internet connectivity. Jul 17, 2015 this decrease can be fixed using a technology called envelope tracking, which has already been adopted in newer 4g lte base stations as well as cellular phones. Ericsson lte now delivers gigabit speeds to more than ten markets worldwide, adding capacity and cutting timetocontent, for a network that keeps one step ahead of its customers. Products base stations lte small cell solutions promoting. Lte can be used on both paired and unpaired spectrum allocations, on licensed and unlicensed spectrum. Software design for an lte base station white paper. Texas instruments keystone soc targets lte wcdma base station applications but it needs high performance software to work. Code issues 19 pull requests 4 actions projects 0 wiki security insights. Ntt docomo upgrades existing base stations for 5g with nec.

Our implementation of this architecture has now migrated two. Slx determines the impact of these various design decisions and parameter selections, while exploring different target architecture configurations and checks if. Oct 06, 2015 both the gsm yatebts and the lte yateenb are modules implemented in software, allowing the base station to be reprogrammed or reconfigured to support new protocols. Bb base band bbu base band unit bh backhaul bs base station. Tis latest software offering makes that happen more quickly. Lteenb allows to build a real 4g lte5g nr base station called an enodeb 4g or gnodeb 5g using a standard pc and a low cost software radio frontend. Characteristics of these base stations are as follows. From body worn, aerial and invehicle, to always on or easily carried and quickly set up. The base stations modular platform consists of a base band unit bbu3900 and remote radio unit rru. The lte phy specification accommodates bandwidths from 1. This white paper will discuss why lte is now a highly attractive technology for private wireless networks across a wide range of enterprise verticals.