UMTS-TDD

UMTS-TDD, an acronym for Universal Mobile Telecommunications System (UMTS) - time-division duplexing (TDD), is a 3GPP standardized version of UMTS networks that use UTRA-TDD. UTRA-TDD is a UTRA that uses time-division duplexing for duplexing. While a full implementation of UMTS, it is mainly used to provide Internet access in circumstances similar to those where WiMAX might be used. UMTS-TDD is not directly compatible with UMTS-FDD: a device designed to use one standard cannot, unless specifically designed to, work on the other, because of the difference in air interface technologies and frequencies used.

UTRA-TDD HCR

UTRA-TDD HCR is one of the air interfaces used for UMTS-TDD. It uses increments of 5 MHz of spectrum, with each slice divided into 10 ms frames containing fifteen time slots (1500 per second). The time slots are allocated in fixed percentage for downlink and uplink. TD-CDMA is used to multiplex streams from or to multiple transceivers.

UTRA-TDD LCR

UTRA-TDD LCR is an alternative air interface used for UMTS-TDD. It is based on TD-SCDMA, and uses 1.6 MHz slices of spectrum, and is standardized in UMTS by the 3GPP.

TDD

TDD may refer to:

Technology

Other uses

Full Metal Panic!

Full Metal Panic! (フルメタル·パニック!, Furumetaru Panikku!, often abbreviated to FMP!) is a series of light novels written by Shoji Gatoh and illustrated by Shiki Douji. The series follows Sousuke Sagara, a member of the covert anti-terrorist private military organization known as Mithril, tasked with protecting Kaname Chidori, a hot-headed Japanese high school girl.

Individual chapters are published on Monthly Dragon Magazine, followed by a paperback compilation released by Fujimi Shobo's Fujimi Fantasia Bunko. The novels are split between stories focusing on Sousuke's mission as a soldier of Mithril and comedic side stories centered on his life at Jindai High School.

The series has been adapted into different media; including three animated television series: Full Metal Panic! by Gonzo in 2002, Full Metal Panic? Fumoffu and Full Metal Panic! The Second Raid by Kyoto Animation in 2003 and 2005 respectively. An OVA was also released in 2006; and five different manga series.

Tokyopop licensed the novels for English-language publication in North America and released parts of the series, while ADV Films licensed and dubbed the first season and the spin-off. The second season was licensed by Kadokawa Pictures USA with ADV Films producing the dub yet again. Mandalay Pictures acquired the film rights to the series in 2009. At Anime USA 2009, Funimation announced that it had acquired the rights to the first and second series of Full Metal Panic! and both were re-released and remastered on DVD and Blu-ray in 2010. The series began airing in North America on November 22, 2010, on the FUNimation Channel. The Fumoffu series made its North American television debut on the FUNimation Channel on November 15, 2010. A spin-off to the light-novel series, called Full Metal Panic! Another, has begun.

Universal Mobile Telecommunications System

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 International Telecommunications Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology. UMTS uses wideband code division multiple access (W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators.

UMTS specifies a complete network system, which includes the radio access network (UMTS Terrestrial Radio Access Network, or UTRAN), the core network (Mobile Application Part, or MAP) and the authentication of users via SIM (subscriber identity module) cards.

The technology described in UMTS is sometimes also referred to as Freedom of Mobile Multimedia Access (FOMA) or 3GSM.

Unlike EDGE (IMT Single-Carrier, based on GSM) and CDMA2000 (IMT Multi-Carrier), UMTS requires new base stations and new frequency allocations.

LTE (telecommunication)

LTE (Long-Term Evolution, commonly marketed as 4G LTE) is a standard for wireless communication of high-speed data for mobile phones and data terminals. It is based on the GSM/EDGE and UMTS/HSPA network technologies, increasing the capacity and speed using a different radio interface together with core network improvements. The standard is developed by the 3GPP (3rd Generation Partnership Project) and is specified in its Release 8 document series, with minor enhancements described in Release 9.

LTE is the natural upgrade path for carriers with both GSM/UMTS networks and CDMA2000 networks. The different LTE frequencies and bands used in different countries will mean that only multi-band phones will be able to use LTE in all countries where it is supported.

Although marketed as a 4G wireless service, LTE (as specified in the 3GPP Release 8 and 9 document series) does not satisfy the technical requirements the 3GPP consortium has adopted for its new LTE Advanced standard. The requirements were originally set forth by the ITU-R organization in its IMT Advanced specification. However, due to marketing pressures and the significant advancements that WiMAX, Evolved HSPA and LTE bring to the original 3G technologies, ITU later decided that LTE together with the aforementioned technologies can be called 4G technologies. The LTE Advanced standard formally satisfies the ITU-R requirements to be considered IMT-Advanced. To differentiate LTE Advanced and WiMAX-Advanced from current 4G technologies, ITU has defined them as "True 4G".

UMTS frequency bands

The UMTS frequency bands are radio frequencies used by third generation (3G) wireless Universal Mobile Telecommunications System networks. They were allocated by delegate to the World Administrative Radio Conference (WARC-92) held in Málaga-Torremolinos, Spain between February 3, 1992 and March 3, 1992. Resolution 212 (Rev.WRC-97), adopted at the World Radiocommunication Conference held in Geneva, Switzerland in 1997, endorsed the bands specifically for the International Mobile Telecommunications-2000 (IMT-2000) specification by referring to S5.388, which states "The bands 1,885-2,025 MHz and 2,110-2,200 MHz are intended for use, on a worldwide basis, by administrations wishing to implement International Mobile Telecommunications 2000 (IMT-2000). Such use does not preclude the use of these bands by other services to which they are allocated. The bands should be made available for IMT-2000 in accordance with Resolution 212 (Rev. WRC-97)." To accommodate the reality that these initially defined bands were already in use in various regions of the world, the initial allocation has been amended multiple times to include other radio frequency bands.