WO2002041590A1 - Commande d'acces au support pour systemes sans fil - Google Patents

Commande d'acces au support pour systemes sans fil Download PDF

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Publication number
WO2002041590A1
WO2002041590A1 PCT/GB2001/005032 GB0105032W WO0241590A1 WO 2002041590 A1 WO2002041590 A1 WO 2002041590A1 GB 0105032 W GB0105032 W GB 0105032W WO 0241590 A1 WO0241590 A1 WO 0241590A1
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WO
WIPO (PCT)
Prior art keywords
atm
interval
protocol
ifs
difs
Prior art date
Application number
PCT/GB2001/005032
Other languages
English (en)
Inventor
Rahim Tafazolli
Georgios Sfikas
Original Assignee
University Of Surrey
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 University Of Surrey filed Critical University Of Surrey
Priority to AU2002214162A priority Critical patent/AU2002214162A1/en
Publication of WO2002041590A1 publication Critical patent/WO2002041590A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/02—Hybrid access

Definitions

  • the invention relates to media access control (MAC) for wireless systems, particularly
  • the invention has particular, though not exclusive, applicability to the Media Access
  • MAC Distributed Foundation Wireless MAC
  • WLANs Wireless Local Area Networks
  • DFWMAC is a hybrid multiple access protocol because the existence of an Access
  • AP Address Translation
  • each frame consisting of two parts - a 'controlled' part
  • the physical layer uses Spread Spectrum (SS) access; both
  • the MAC protocol uses a contention mechanism to allow stations to share a wireless
  • This mechanism is based on a Carrier Sense Multiple Access (CSMA) mechanism, similar to the IEEE 802.3 standard.
  • CSMA Carrier Sense Multiple Access
  • CSMA-CD Collision Detection mechanism
  • wireless terminal is not always able to determine that a collision has occurred until the
  • DCF Distributed Coordination Function
  • DCF is implemented in every station. It is used both for offering asynchronous data
  • the CSMA-CA protocol is a
  • the channel to determine if the medium is available, and transmits only when the
  • InterFrame Spacing to give priorities to different types of MAC packets.
  • All stations do not transmit any information for a time period DIFS.
  • terminal A calculate a
  • random backoff number which is a timer that indicates when this packet can
  • the slot duration depends on the physical layer implementation. Its value is chosen
  • Equation 1 The value of the CW in Equation 1 is initialised to CWTM n .
  • duration is being calculated for each packet. As explained, this duration is used as the
  • the packet is transmitted when the timer reaches
  • Short IFS Short IFS
  • the CTS packet follows the RTS and has increased
  • PCF Point IFS
  • the point coordinator (one of the terminals in an ad hoc network, or an AP, if
  • the AP informs each terminal of its turn to transmit, by polling it.
  • Each of the mobile stations can appear more than once
  • the AP initiates the PCF periodically (every
  • the AP informs the mobile stations of the beginning of the next
  • DCF period by sending a certain packet. If the transmitted packets are being
  • SIFS timer expires (SIFS is shorter than PIFS). If a terminal does not react
  • the PCF (the AP) shall resume control and transmit
  • the contention free period is limited to allow
  • PDU MAC Protocol Data Unit
  • the first part (which uses the PCF) can be used for delay sensitive services, such as voice and video, whereas the second part (which uses the PCF) can be used for delay sensitive services, such as voice and video, whereas the second part (which uses the PCF).
  • the DCF can be used for delay independent services, such as general computer data
  • the transmission rate of the IEEE 802.11 physical layer is either 1 or 2 Mbps, per
  • AP Access Point
  • Random access techniques are suitable
  • the DCF can be used and an adhoc
  • An objective of the present invention is to improve efficiency of operation and QoS,
  • the present invention provides an Asynchronous Transfer Mode (ATM)
  • DCF Distributed Coordination Function
  • DIFS Distributed Interframe Spacing
  • PCF Point Coordination Function
  • PIFS Point Interframe Spacing
  • Interframe Spacing defining an interval(s) intermediate the interval
  • the ATM QoS can be mapped to at least three different priorities
  • PIFS used for real time (delay sensitive) ATM services
  • the or each additional IFS is capable of creating different priorities amongst different priorities
  • non-real time services such as nrt VBR (non-real time Variable Bit-Rate), ABR
  • Figure 1(a) illustrates a known CSMA-CA access mechanism
  • Figure 1(b) illustrates a MAC protocol Superframe structure
  • Figure 1(c) illustrates stretching effect of the Superframe structure of Figure 1(b)
  • Figure 1(d) illustrates a simplified packet structure according to the IEEE 802.111
  • Figure 2 shows a CSMA-CA access mechanism according to the invention.
  • At least one additional IFS is provided to create different priorities between non-real
  • a first additional IFS defining an interval ABRIFS supports ABR traffic and serves to differentiate ABR traffic from UBR traffic (which is
  • non-real time traffic (such as UBR traffic) is needed when two stations exchange
  • RTS/CTS messages to reserve resources (band width) for, and transmit, those
  • interval nrt-VBRIFS is also provided. This additional IFS supports nrt- VBR traffic
  • nrt-VBRIFS could be the same as the ABRIFS. In this case, even though the nrt-VBRIFS
  • VBR and ABR services would have the same access priority (because their IFSs are

Landscapes

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

Abstract

La présente invention concerne un procédé de transmission en mode de transfert asynchrone (ATM) dans lequel il est fait appel à un protocole MAC comprenant une fonction de coordination distribuée (DCF) à intervalle intertrame distribué (DIFS) et une fonction de coordination par points (PCF) à intervalle intertrame ponctuel (PIFS). Le protocole précité comprend au moins un intervalle intertrame supplémentaire dont l'intervalle est intermédiaire entre l'intervalle DIFS et l'intervalle PIFS.
PCT/GB2001/005032 2000-11-17 2001-11-15 Commande d'acces au support pour systemes sans fil WO2002041590A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002214162A AU2002214162A1 (en) 2000-11-17 2001-11-15 Media access control for wireless systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0028111A GB0028111D0 (en) 2000-11-17 2000-11-17 Media access control for wireless systems
GB0028111.3 2000-11-17

Publications (1)

Publication Number Publication Date
WO2002041590A1 true WO2002041590A1 (fr) 2002-05-23

Family

ID=9903386

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/005032 WO2002041590A1 (fr) 2000-11-17 2001-11-15 Commande d'acces au support pour systemes sans fil

Country Status (3)

Country Link
AU (1) AU2002214162A1 (fr)
GB (1) GB0028111D0 (fr)
WO (1) WO2002041590A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005025148A1 (fr) * 2003-09-08 2005-03-17 Philips Intellectual Property & Standards Gmbh Procede de mise a disposition d'un protocole d'acces a un support
WO2005048536A1 (fr) * 2003-11-17 2005-05-26 Somfy Sas Etablissement et relais de liaison dans un reseau ad hoc de domotique
WO2005067215A1 (fr) * 2003-12-19 2005-07-21 Intel Corporation Interrogation sur des reseaux sans fil par modification dynamique d'intervalles d'interrogation et interrogation virtuelle
WO2005086426A1 (fr) * 2004-03-08 2005-09-15 Matsushita Electric Industrial Co., Ltd. Methode pour reduire un acces au surdebit numerique dans un reseau sans fil
EP1681806A1 (fr) * 2005-01-18 2006-07-19 Marvell World Trade Ltd. Nouveau protocole à multiplexage temporel pour WLAN
US7336642B2 (en) 2003-08-07 2008-02-26 Skypilot Networks, Inc. Communication protocol for a wireless mesh architecture
US7643509B2 (en) * 2003-12-22 2010-01-05 Electronics And Telecommunications Research Institute Hybrid implicit token carrier sensing multiple access/collision avoidance protocol
KR100934985B1 (ko) 2004-01-19 2010-01-06 삼성전자주식회사 Ｄｃｆ를 따르는 무선통신방법
US7751374B2 (en) 2005-01-18 2010-07-06 Marvell World Trade Ltd. WLAN TDM protocol
US7920530B2 (en) 2005-01-18 2011-04-05 Marvell World Trade Ltd. WLAN TDM IFS time selection protocol
US8259655B2 (en) 2004-11-26 2012-09-04 Samsung Electronics Co., Ltd. Medium access method for contention and non-contention
WO2012160488A1 (fr) * 2011-05-20 2012-11-29 Renesas Mobile Corporation Commande d'accès à un canal partagé
US8660109B2 (en) 2011-05-20 2014-02-25 Renesas Mobile Corporation Apparatus and method for controlling communication

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CALLEGATI F ET AL: "Analysis of CSMA/CA protocol for wireless networking of ATM multiservice applications", GATEWAY TO THE TWENTY FIRST CENTURY. INTERNATIONAL CONFERENCE ON UNIVERSAL PERSONAL COMMUNICATIONS. 1996 5TH IEEE INTERNATIONAL CONFERENCE ON UNIVERSAL PERSONAL COMMUNICATIONS RECORD (CAT. NO.96TH8185), PROCEEDINGS OF ICUPC - 5TH INTERNATIONAL CONFER, 1996, New York, NY, USA, IEEE, USA, pages 286 - 290 vol.1, XP002191059, ISBN: 0-7803-3300-4 *
DR-JIUNN DENG ET AL: "A nonpreemptive priority-based access control scheme for broadband ad hoc wireless ATM local area networks", IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, SEPT. 2000, IEEE, USA, vol. 18, no. 9, pages 1731 - 1739, XP002191060, ISSN: 0733-8716 *

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7336642B2 (en) 2003-08-07 2008-02-26 Skypilot Networks, Inc. Communication protocol for a wireless mesh architecture
US8644271B2 (en) 2003-08-07 2014-02-04 Trilliant Networks, Inc. Communication protocol for a wireless mesh architecture
US8126006B2 (en) 2003-09-08 2012-02-28 Koninklijke Philips Electronics N.V. Method of providing a medium access protocol
WO2005025148A1 (fr) * 2003-09-08 2005-03-17 Philips Intellectual Property & Standards Gmbh Procede de mise a disposition d'un protocole d'acces a un support
WO2005048536A1 (fr) * 2003-11-17 2005-05-26 Somfy Sas Etablissement et relais de liaison dans un reseau ad hoc de domotique
CN100479608C (zh) * 2003-11-17 2009-04-15 Somfy两合公司 本地自动化adhoc网络中的链路建立和中继
US7706399B2 (en) 2003-12-19 2010-04-27 Intel Corporation Polling in wireless networks
WO2005067215A1 (fr) * 2003-12-19 2005-07-21 Intel Corporation Interrogation sur des reseaux sans fil par modification dynamique d'intervalles d'interrogation et interrogation virtuelle
US7643509B2 (en) * 2003-12-22 2010-01-05 Electronics And Telecommunications Research Institute Hybrid implicit token carrier sensing multiple access/collision avoidance protocol
US7974302B2 (en) 2003-12-22 2011-07-05 Electronics And Telecommunications Research Institute Hybrid implicit token carrier sensing multiple access/collision avoidance protocol
US7907627B2 (en) 2004-01-19 2011-03-15 Samsung Electronics Co., Ltd. Wireless communication method following DCF rule
KR100934985B1 (ko) 2004-01-19 2010-01-06 삼성전자주식회사 Ｄｃｆ를 따르는 무선통신방법
WO2005086426A1 (fr) * 2004-03-08 2005-09-15 Matsushita Electric Industrial Co., Ltd. Methode pour reduire un acces au surdebit numerique dans un reseau sans fil
US7773577B2 (en) 2004-03-08 2010-08-10 Panasonic Corporation Method for reducing medium access overhead in a wireless network
US8259655B2 (en) 2004-11-26 2012-09-04 Samsung Electronics Co., Ltd. Medium access method for contention and non-contention
US7920530B2 (en) 2005-01-18 2011-04-05 Marvell World Trade Ltd. WLAN TDM IFS time selection protocol
US7751374B2 (en) 2005-01-18 2010-07-06 Marvell World Trade Ltd. WLAN TDM protocol
US8483190B2 (en) 2005-01-18 2013-07-09 Marvell World Trade Ltd. Wireless local area network (WLAN) time division multiplexed (TDM) interframe space (IFS) time selection protocol
EP1681806A1 (fr) * 2005-01-18 2006-07-19 Marvell World Trade Ltd. Nouveau protocole à multiplexage temporel pour WLAN
US9301247B2 (en) 2005-01-18 2016-03-29 Marvell World Trade Ltd. Wireless local area network (WLAN) time division multiplexed (TDM) interframe space (IFS) time selection protocol
WO2012160488A1 (fr) * 2011-05-20 2012-11-29 Renesas Mobile Corporation Commande d'accès à un canal partagé
US8660109B2 (en) 2011-05-20 2014-02-25 Renesas Mobile Corporation Apparatus and method for controlling communication

Also Published As

Publication number Publication date
GB0028111D0 (en) 2001-01-03
AU2002214162A1 (en) 2002-05-27

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