From Long Term Evolution: 3GPP LTE Radio and Cellular Technology

Wolfgang Zirwas, Wolfgang Mennerich, Martin Schubert, Lars Thiele, Volker Jungnickel, and Egon Schulz

Abstract

The 3rd Generation Partnership Project (3GPP) long tem evolution (LTE) release 8 specification defines the basic functionality of a new high-performance air interface providing high user data rates in combination with low latency based on MIMO (multiple input, multiple output), OFDMA (orthogonal frequency division multiple access), and an optimized system architecture evolution (SAE) as main enablers. At the same time, in the near future, increasing numbers of users will request mobile broadband data access everywhere for example, for synchronization of e-mails, Internet access, specific applications, and file downloads to mobile devices like personal digital assistants (PDAs) or notebooks. In the future, a 100-fold increase in mobile data traffic is expected [1], making further improvements beyond LTE release 8 necessary and possibly ending up in new LTE releases or in a so-called international mobile telecommunications (IMT) advanced system [2 4]. IMT-advanced is a concept from the ITU (International Telecommunication Union) for mobile communication systems with capabilities that go further than that of IMT-2000. IMT-advanced was previously known as systems beyond IMT-2000.

The main enemy in today's cellular radio systems is interference. Although intra-cell interference is of minor importance for OFDMA systems like LTE, intersector as well as intersite interference reduces achievable spectral efficiency by factors. Multiuser MIMO (MU-MIMO) and OFDMA partly help to combat interference by beam forming gains and due to selection of resources less affected by interference. In the interference-limited case meaning small cell sizes like pico or...

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Products & Services
3G, UMTS, and EDGE Chips
Third generation (3G) cellular communication chips include UMTS and EDGE chips. Universal mobile telecommunication system (UMTS) chips provide high-speed data access. Enhanced data rates for GSM evolution (EDGE) chips make GSM implementation easier.
Telephones and Cellular Phones
Telephones and cellular phones convert voice or other sound signals into a form that can be transmitted to another device that receives and reconverts the waves back into sound.
Wireless Communications Services
Wireless communications services provide cellular phone service, SMS, WAP and GPRS services to mobile phones.
Biometric Sensor Chips
Biometric sensors are semiconductors with embedded algorithms that are used in security systems or environments for user authentication.
LAN Chips
LAN chips provide wireless local area network (LAN) connectivity in a system-on-chip platform.

Topics of Interest

Rainer Schoenen 8.1 Introduction In technologies developed a few years ago, the use of relays has hardly been studied, not to mention any standardization taking place. Long term evolution (LTE)...

Borko Furht and Syed Ahson Mobile users are demanding higher data rate and higher quality mobile communication services. The 3rd Generation Mobile Communication System (3G) is an outstanding success.

Acronyms 3GPP 3rd Generation Partnership Project AC admission control ACK acknowledgment AMBR aggregated maximum bit rate AP access point App. application ARP allocation retention...

References 1. Dahlman, E., S. Parkvall, J. Skold, and P. Beming. 2007. 3G Evolution, HSPA and LTE for mobile broadband. Orlando, FL: Academic Press. 2. 3GPP TS 36.322. E-UTRA radio link control (RLC)...

M. Andersson, A. Wolfgang, C. Orlenius, and J. Carlsson 12.1 Introduction Multipath fading has for many years been a problem for mobile communication engineers, to be overcome by designing systems...