EP1980076A1 - Procede pour la transmission de signaux dans un systeme de communication radio - Google Patents

Procede pour la transmission de signaux dans un systeme de communication radio

Info

Publication number
EP1980076A1
EP1980076A1 EP07703629A EP07703629A EP1980076A1 EP 1980076 A1 EP1980076 A1 EP 1980076A1 EP 07703629 A EP07703629 A EP 07703629A EP 07703629 A EP07703629 A EP 07703629A EP 1980076 A1 EP1980076 A1 EP 1980076A1
Authority
EP
European Patent Office
Prior art keywords
symbol
frame
time slot
symbols
guard interval
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07703629A
Other languages
German (de)
English (en)
Inventor
Bernhard Raaf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks GmbH and Co KG
Original Assignee
Nokia Siemens Networks GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Siemens Networks GmbH and Co KG filed Critical Nokia Siemens Networks GmbH and Co KG
Priority to EP07703629A priority Critical patent/EP1980076A1/fr
Publication of EP1980076A1 publication Critical patent/EP1980076A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals

Definitions

  • the invention relates to a method for signal transmission in a radio communication system, in particular using OFDM symbols.
  • Protection intervals serve to prevent reception-side superpositions of two successive transmitted symbols occurring due to multipath propagation. Protection intervals are dimensioned, for example, depending on so-called scenarios, based, for example, on different situations such as inner city or land area.
  • E-UTRA Universal Mobile Telecommunication Standard
  • LTE Long Term Evolution
  • OFDMA OFDMA
  • the object of the invention is therefore to specify a method for transmitting OFDM symbols in a transmission frame in which the advantages associated with a longer guard interval are used efficiently. This object is achieved by the method, the radio communication system and the transmitting device according to the independent patent claims. Further embodiments of the invention can be taken from the dependent claims.
  • At least one symbol of a frame or time slot is provided with a longer guard interval compared to further symbols of the frame or time slot, wherein the at least one symbol has a content known on the receiver side.
  • this results in a reduced susceptibility to delay differences compared with the other symbols of the frame or time slot, so that a safer detection of the symbol on the receiving side is made possible.
  • the at least one symbol is an OFDM symbol which has known samples on the receiver side.
  • the at least one symbol is a pilot symbol.
  • Increased protection of pilot symbols is of particular importance since a pilot symbol that is not detected or not detected incorrectly, which is used on the receiver side, for example, for channel estimation, leads to the fact that the further symbols of a frame or time slot can also be detected with a lower quality.
  • the radio communication system according to the invention and the transmitting device according to the invention each have means for carrying out the method according to the invention.
  • FIG 1 shows an exemplary structure of a radio communication system
  • FIG 2 shows a frame or time slot according to the invention.
  • FIG. 1 the structure of a radio communication system, in particular according to the current state of E-UTRA or UMTS-LTE standardization, is shown by way of example.
  • a so-called access network gateway aGW Access Gateway communicates with other components of the system or other systems via an IP-based (IP - Internet Protocol) network. With this network, the access network gateway aGW exchanges data traffic in the form of data packets.
  • the access network Transition aGW is further connected to a plurality of base stations NB (Node B), which respectively supply at least one radio cell ZA or ZB with radio resources.
  • the base stations NB illustrated by way of example are in turn connected to subscriber terminals UE A, UE B via a radio interface. Signals are transmitted in the uplink UL (uplink) and downlink DL (downlink) on the radio interface.
  • the base stations NB and the subscriber terminals UE A, UE B each have at least one transmission
  • a control device ST in particular for controlling the transmitting / receiving devices SEE in the base station NB and the user equipment UE A, UE B on.
  • the invention is used particularly advantageously for the development of the UMTS standard described in the introduction.
  • a longer guard interval can be assigned to the so-called first reference symbol described in Chapter 7.1.1.2.2 of Technical Report TR 25.814.
  • This reference symbol is used, for example, for channel estimation, channel quality measurement or cell search.
  • this reference symbol is transmitted secondarily within a subframe, but a different arrangement within the framework according to Chapter 7.1.1.2.2 is also conceivable.
  • the position may also vary from subframe to subframe as well as between adjacent radio cells.
  • FIG. 2 shows an embodiment which is based on the structure of a subframe according to FIG. 7.1.1.2.2-1 of Technical Report TR 25.814. Shown is a subframe SF (sub frame) of a subcarrier. It is assumed by way of example that the first reference symbol R, which is provided with an extended guard interval cp *, is arranged as a second symbol in the subframe.
  • the further symbols D of the subframe contribute For example, payload and / or signaling data, and thus control data.
  • a second reference symbol could be provided in a subframe in the same way as shown in FIG. 7.1.1.2.2-1, wherein it could be provided with the extended guard interval like the first reference symbol R. This could also be controlled, for example, depending on a current transmission situation, for example a scenario mentioned at the outset or a current traffic load.
  • the invention is not limited to the illustrated structure of a frame, but rather can find application in a wide variety of configurations of frames or time slots as well as designs of symbols with contents similar to the exemplary reference symbol.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé où côté émission au moins un symbole d'un cadre respectivement d'un intervalle de temps est muni d'un intervalle de protection prolongé en comparaison d'autres symboles du cadre respectivement de l'intervalle de temps, au moins le symbole avec l'intervalle de protection prolongé présentant un contenu connu côté réception.
EP07703629A 2006-01-18 2007-01-04 Procede pour la transmission de signaux dans un systeme de communication radio Withdrawn EP1980076A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07703629A EP1980076A1 (fr) 2006-01-18 2007-01-04 Procede pour la transmission de signaux dans un systeme de communication radio

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06001062 2006-01-18
PCT/EP2007/050068 WO2007082792A1 (fr) 2006-01-18 2007-01-04 Procede pour la transmission de signaux dans un systeme de communication radio
EP07703629A EP1980076A1 (fr) 2006-01-18 2007-01-04 Procede pour la transmission de signaux dans un systeme de communication radio

Publications (1)

Publication Number Publication Date
EP1980076A1 true EP1980076A1 (fr) 2008-10-15

Family

ID=37813763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07703629A Withdrawn EP1980076A1 (fr) 2006-01-18 2007-01-04 Procede pour la transmission de signaux dans un systeme de communication radio

Country Status (6)

Country Link
US (1) US20110013706A1 (fr)
EP (1) EP1980076A1 (fr)
CN (1) CN101371548A (fr)
RU (1) RU2426258C2 (fr)
WO (1) WO2007082792A1 (fr)
ZA (1) ZA200806179B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101420265B (zh) * 2007-10-26 2012-08-08 鼎桥通信技术有限公司 一种长期演进系统中的数据传输方法、系统及装置
GB2513839A (en) * 2013-03-28 2014-11-12 Sony Corp Transmitter and method of transmitting
US20140294124A1 (en) 2013-03-28 2014-10-02 Sony Corporation Transmitter and method of transmitting and receiver and method of detecting ofdm signals

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9413481D0 (en) * 1994-07-05 1994-08-24 British Broadcasting Corp Improvements to digital transmission systems
DE4425713C1 (de) * 1994-07-20 1995-04-20 Inst Rundfunktechnik Gmbh Verfahren zur Vielträger Modulation und Demodulation von digital codierten Daten
US6922388B1 (en) * 2000-02-11 2005-07-26 Lucent Technologies Inc. Signal construction, detection and estimation for uplink timing synchronization and access control in a multi-access wireless communication system
EP1274193A1 (fr) * 2001-07-04 2003-01-08 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Procédé et dispositif pour mettre à disposition des informations de synchronisation dans un réseau de communication sans fil
US7042857B2 (en) * 2002-10-29 2006-05-09 Qualcom, Incorporated Uplink pilot and signaling transmission in wireless communication systems
US7599327B2 (en) * 2004-06-24 2009-10-06 Motorola, Inc. Method and apparatus for accessing a wireless communication system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007082792A1 *

Also Published As

Publication number Publication date
ZA200806179B (en) 2009-07-29
RU2426258C2 (ru) 2011-08-10
WO2007082792A1 (fr) 2007-07-26
CN101371548A (zh) 2009-02-18
US20110013706A1 (en) 2011-01-20
RU2008133593A (ru) 2010-02-27

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