EP1325654A2 - Procede d'exploitation d'un systeme de communication semi-duplex asymetrique - Google Patents

Procede d'exploitation d'un systeme de communication semi-duplex asymetrique

Info

Publication number
EP1325654A2
EP1325654A2 EP01973443A EP01973443A EP1325654A2 EP 1325654 A2 EP1325654 A2 EP 1325654A2 EP 01973443 A EP01973443 A EP 01973443A EP 01973443 A EP01973443 A EP 01973443A EP 1325654 A2 EP1325654 A2 EP 1325654A2
Authority
EP
European Patent Office
Prior art keywords
downlink
uplink
time
channels
time slots
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Withdrawn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
EP01973443A
Other languages
German (de)
English (en)
Inventor
Paul Dent
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.)
Ericsson Inc
Original Assignee
Ericsson Inc
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 Ericsson Inc filed Critical Ericsson Inc
Publication of EP1325654A2 publication Critical patent/EP1325654A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth

Definitions

  • the importance of providing the same downlink/uplink time slot timing for all network/mobile terminal links is to avoid protocol changes in such matters as whether a packet can be acknowledged immediately after it is received, with due allowance for any processing delays. If there were variable delays between uplink and downlink time slots, different links may be needed to use variations in the protocol to allow for processing delays, which is undesirable.
  • the invention advantageously maintains the same timing for all links, and it therefore is not necessary to adapt a packet protocol in dependence upon the exact frequency and time slot allocated.
  • Fig. 5 shows a 3-slot time reuse plan based on 3-sector cells.
  • Sectorization is a common technique used in cellular systems to reduce the amount of real estate required for antenna sites by a factor of 3 or more. Instead of illuminating a cell from an antenna at its center, three neighboring cells are illuminated by a common antenna at their mutual boundary, the antenna having three, 120 degree directional patterns corresponding to the three cells, which are then renamed "sectors". When the three sectors of the same site use three different frequencies, but adjacent sites use the same three frequencies, such a frequency plan is termed a 1-site, 3-sector plan.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

L'invention concerne un système de communications mobiles exploité de manière à améliorer sa capacité dans des conditions d'écoulement du trafic asymétrique. Lorsque des quantités d'écoulement du trafic similaires surviennent dans chaque direction de liaison montante et de liaison descendante, des canaux d'une première bande de fréquence du spectre radio sont utilisés afin de transmettre des informations dans la direction de la liaison descendante à partir de stations de réseau vers des terminaux mobiles et des canaux d'une seconde bande de fréquence du spectre radio sont utilisés afin de transmettre des informations dans la direction de la liaison montante à partir de terminaux mobiles vers des stations de réseau. Lorsque de l'écoulement du trafic asymétrique survient parce que les terminaux mobiles reçoivent au total plus d'informations des stations de réseau qu'ils ne leur en transmettent, une partie du spectre radio des spectres asymétriques de liaison montante et descendante sont conçus de manière proportionnelle par rapport au ratio entre le flux de données de liaison montante total et le flux de données de liaison descendante.
EP01973443A 2000-10-06 2001-09-24 Procede d'exploitation d'un systeme de communication semi-duplex asymetrique Withdrawn EP1325654A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US680900 1991-04-05
US68090000A 2000-10-06 2000-10-06
PCT/US2001/029829 WO2002032163A2 (fr) 2000-10-06 2001-09-24 Procede d'exploitation d'un systeme de communication semi-duplex asymetrique

Publications (1)

Publication Number Publication Date
EP1325654A2 true EP1325654A2 (fr) 2003-07-09

Family

ID=24732981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01973443A Withdrawn EP1325654A2 (fr) 2000-10-06 2001-09-24 Procede d'exploitation d'un systeme de communication semi-duplex asymetrique

Country Status (4)

Country Link
EP (1) EP1325654A2 (fr)
JP (1) JP2004511981A (fr)
AU (1) AU2001293020A1 (fr)
WO (1) WO2002032163A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2485387A (en) * 2010-11-12 2012-05-16 Ip Wireless Inc Wireless communication system, communication unit, and method for scheduling

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006094003A (ja) 2004-09-22 2006-04-06 Ntt Docomo Inc 移動通信システムおよび周波数帯割当装置ならびに周波数帯割当方法
CN100450261C (zh) * 2005-09-20 2009-01-07 华为技术有限公司 一种移动通信系统的频率分配方法
US7969923B2 (en) 2008-11-14 2011-06-28 Dbsd Satellite Services G.P. Asymmetric TDD in flexible use spectrum

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6016311A (en) * 1997-11-19 2000-01-18 Ensemble Communications, Inc. Adaptive time division duplexing method and apparatus for dynamic bandwidth allocation within a wireless communication system
FR2777407B1 (fr) * 1998-04-10 2000-06-30 Wavecom Sa Signal de radiotelephonie cellulaire a canal supplementaire affecte au sens descendant, procede, systeme, mobile et station de base correspondant
US6628626B1 (en) * 1999-07-02 2003-09-30 Lucent Technologies Inc. Wireless data communications using asymmetric channel allocation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0232163A3 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2485387A (en) * 2010-11-12 2012-05-16 Ip Wireless Inc Wireless communication system, communication unit, and method for scheduling

Also Published As

Publication number Publication date
AU2001293020A1 (en) 2002-04-22
WO2002032163A3 (fr) 2002-10-03
JP2004511981A (ja) 2004-04-15
WO2002032163A2 (fr) 2002-04-18

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Legal Events

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Owner name: ERICSSON INC.

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Effective date: 20070331