WO2011049430A2 - Procédé d'optimisation de qualité de flux de multidiffusion sur point d'accès hertzien - Google Patents

Procédé d'optimisation de qualité de flux de multidiffusion sur point d'accès hertzien Download PDF

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Publication number
WO2011049430A2
WO2011049430A2 PCT/MY2010/000219 MY2010000219W WO2011049430A2 WO 2011049430 A2 WO2011049430 A2 WO 2011049430A2 MY 2010000219 W MY2010000219 W MY 2010000219W WO 2011049430 A2 WO2011049430 A2 WO 2011049430A2
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WO
WIPO (PCT)
Prior art keywords
data
rate
access point
wireless
rates
Prior art date
Application number
PCT/MY2010/000219
Other languages
English (en)
Other versions
WO2011049430A3 (fr
Inventor
Mohd Ariff Abdullah
Muhammad Faheem Mohd Ezani
Shariq Haseeb
Gopinath Rao Sinniah
Original Assignee
Mimos Berhad
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 Mimos Berhad filed Critical Mimos Berhad
Publication of WO2011049430A2 publication Critical patent/WO2011049430A2/fr
Publication of WO2011049430A3 publication Critical patent/WO2011049430A3/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/25—Flow control; Congestion control with rate being modified by the source upon detecting a change of network conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/15—Flow control; Congestion control in relation to multipoint traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/19—Flow control; Congestion control at layers above the network layer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/22—Traffic shaping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • 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
    • H04W28/22—Negotiating communication rate

Definitions

  • the present invention generally relates to a wireless multicast method, and particularly relates to a method of optimizing the quality of multicast streams over a wireless access point.
  • a wireless transfer of data streams using multicasting typically delivers information such as music and video contents through wireless routes by transmitting singular multicast content from a base station or access point to a plurality of wireless terminal nodes, and these nodes simultaneously receive the multicast content.
  • Multicast transmission is substantially more efficient compared to a plurality of unicast transmissions, providing that the system is able to broadcast to the plurality of nodes. Because frequency spectrum for wireless services is limited and costly to expand, multicast services have become very appealing to wireless service providers.
  • Multicast traffic is inherently different because it contains packets of typically large capacity data including music and video.
  • This invention relates to a method of optimizing the quality of multicast services over a wireless network by increasing the rate at which the multicast stream is transmitted.
  • the method comprises dynamically setting a broadcast rate at which the multicast stream is transmitted by suppressing an automatic rate fallback (ARF) protocol so that the broadcast rate is not limited to the minimum data rate between an access point and terminal nodes of the wireless network.
  • ARF automatic rate fallback
  • This invention also relates to a method of optimizing data rates for wireless multicast traffic between at least one access point and a plurality of nodes having a plurality of operable rates, comprising the steps of:
  • This invention further relates to a method of optimizing data rates for wireless multicast traffic between at least one access point and a plurality of nodes having a plurality of operable rates, comprising the steps of:
  • This invention also relates to a wireless multicasting system that optimizes the quality of multicast services over a wireless network comprising: at least one access point for transmitting data streams received from a source at a plurality of operable rates, including a broadcast data rate; a plurality of nodes adapted to link to and receive the data streams; and a means of dynamically controlling broadcast data rate.
  • This controlling of the broadcast data rate is achieved by suppressing an ARF protocol so that the broadcast data rate is not limited to the minimum rate between the access point and the nodes.
  • the ARF automatically lowers the broadcast data rate when there is a client that needs to operate at a lower rate, for example when there are noise signals causing link errors, which do not allow the data stream to be sent at higher rates.
  • the broadcast rate is lowered, so is the multicast stream rate.
  • This invention proposes to stop the ARF protocol from limiting the broadcast data rate to the minimum data rate in the wireless network.
  • the multicast stream rate is initially set to the maximum rate.
  • the multicast stream rate transmitted to each node is lowered over the plurality of operable rates until the data loss reaches an acceptable level or until the minimum rate is reached, whichever is first.
  • the access point determines that the data loss is caused by link error and not other factors such as collision. This is achieved by a feedback from the nodes to the access point. This feedback may either be an ACK frame or a NAK frame. An ACK frame received by the access point means that the node has received the data packet without any error. If the node sends a NAK frame, it means that the packets sent to the node contain an error and need to be sent again.
  • This invention further relates to a wireless multicasting system that optimizes the quality of multicast services over a wireless network comprising: at least one access point, said access point able to transmit data streams received from a source at a plurality of operable rates, including a broadcast data rate; and a plurality of nodes adapted to link to and receive data streams from the access point such that the broadcast data rate can be manually set to any of the operable rates.
  • the access point still initially transmits at the maximum data rate to the nodes, until there is data loss between said access point and any said node, upon which the data rate is lowered to a lower rate until the data loss in minimized or the rate that was manually set is reached.
  • the access point determines that the data loss is caused by link error and not other factors such as collision. This is achieved by a feedback from the nodes to the access point. This feedback may either be an ACK frame or a NAK frame.
  • An ACK frame received by the access point means that the node has received the data packet without any error. If the node sends a NAK frame, it means that the packets sent to the node contain an error and need to be sent again. However, if neither ACK nor NAK is received by the access point upon sending a data packet, then it is likely that the packets have been lost due to collision. The access point then sets a back off timer before sending the packets again to avoid another collision.
  • a data collision is not a link error, and does not necessitate a lowering of the data rate.
  • the minimum rate can be set very high, at the cost of the coverage area.
  • the multicast stream is relatively small, minimum rate can be set very low, thus allowing the access point to serve a larger area. This is an improvement over the current method whereby the access point serves a constant width of coverage and various data rates statically, and regardless of the distance from the client nodes. This is highly inefficient, especially if the distance between access point and nodes is very small.
  • the methods and systems described above operate within the 802.1 1 protocol. In another preferred embodiment, the methods and systems described above operate with wireless network attachment points using the 801.1 1 technology.
  • Figure 1 shows a flowchart depicting a process flow in an embodiment of this invention.
  • Figure 2 shows a diagram of a wireless network in an embodiment of this invention.
  • the wireless data streams sent over the wireless network can be at any of a plurality of operable rates.
  • a broadcast rate is usually limited to the lowest operable rate, and is used mainly for operational or maintenance purposes.
  • the multicast data is sent on broadcast data rates.
  • Typical wireless networks employ Automatic Rate Fallback (ARF) mechanisms or protocols to limit the broadcast rate to the minimum.
  • ARF Automatic Rate Fallback
  • the ARF protocol is disabled so the broadcast data rate is not limited to the minimum rate.
  • Figure 1 a feedback method that allows the data rate to remain at a higher rate until data loss occurs.
  • the wireless access point (10) checks to see is a NAK is received ⁇ NAK received? ⁇ .
  • the NAK is sent by the receiving terminal node (20) only when the data packet received contains an error and needs to be resent. If no NAK is received by the access point (10), the wireless point (10) checks to see if an ACK is received ⁇ ACK received? ⁇ from the node (20).
  • NAK In the case that NAK is received, this usually means the data loss is due to link error.

Abstract

L'invention concerne un procédé d'optimisation de qualité de services de multidiffusion via un réseau hertzien par régulation dynamique de débit de diffusion, qui consiste à : supprimer un protocole de secours de débit automatique pour qu'un débit binaire de diffusion ne soit pas limité au débit binaire de base; transmettre un flux de données de multidiffusion depuis un point d'accès à une pluralité de noeuds; détecter une perte éventuelle de données dans le flux de données de multidiffusion considéré; et abaisser le débit binaire pour chaque noeud de façon incrémentielle en cas de perte de données, jusqu'à ce que la perte de données atteigne un niveau acceptable ou que le débit minimum considéré soit atteint, le premier des deux critères à survenir étant déclencheur.
PCT/MY2010/000219 2009-10-23 2010-10-22 Procédé d'optimisation de qualité de flux de multidiffusion sur point d'accès hertzien WO2011049430A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI20094478 2009-10-23
MYPI20094478A MY157644A (en) 2009-10-23 2009-10-23 Method for optimizing quality of multicast stream over wireless access point

Publications (2)

Publication Number Publication Date
WO2011049430A2 true WO2011049430A2 (fr) 2011-04-28
WO2011049430A3 WO2011049430A3 (fr) 2011-10-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MY2010/000219 WO2011049430A2 (fr) 2009-10-23 2010-10-22 Procédé d'optimisation de qualité de flux de multidiffusion sur point d'accès hertzien

Country Status (2)

Country Link
MY (1) MY157644A (fr)
WO (1) WO2011049430A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110519795A (zh) * 2018-05-21 2019-11-29 华为技术有限公司 一种确定背景流量传输策略的方法及装置
WO2019232681A1 (fr) * 2018-06-04 2019-12-12 Beijing Thomson Commerce Co., Ltd. Procédé pour la fourniture de services, et passerelle, support de stockage, et produit programme d'ordinateur associés

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050286440A1 (en) * 2004-06-24 2005-12-29 Meshnetworks, Inc. System and method for adaptive rate selection for wireless networks
US20080225811A1 (en) * 2007-03-12 2008-09-18 Conexant Systems Inc. Systems and Methods For Reliable Broadcast and Multicast Transmission Over Wireless Local Area Network
US20090147678A1 (en) * 2007-12-05 2009-06-11 Texas Instruments Incorporated Systems and methods for traffic flow based rate adaptation in packet-based networks
US20090175182A1 (en) * 2008-01-07 2009-07-09 Microsoft Corporation Differentiated service transmission parameters adaptation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050286440A1 (en) * 2004-06-24 2005-12-29 Meshnetworks, Inc. System and method for adaptive rate selection for wireless networks
US20080225811A1 (en) * 2007-03-12 2008-09-18 Conexant Systems Inc. Systems and Methods For Reliable Broadcast and Multicast Transmission Over Wireless Local Area Network
US20090147678A1 (en) * 2007-12-05 2009-06-11 Texas Instruments Incorporated Systems and methods for traffic flow based rate adaptation in packet-based networks
US20090175182A1 (en) * 2008-01-07 2009-07-09 Microsoft Corporation Differentiated service transmission parameters adaptation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110519795A (zh) * 2018-05-21 2019-11-29 华为技术有限公司 一种确定背景流量传输策略的方法及装置
CN110519795B (zh) * 2018-05-21 2021-12-10 华为技术有限公司 一种确定背景流量传输策略的方法及装置
US11601849B2 (en) 2018-05-21 2023-03-07 Huawei Technologies Co., Ltd. Method for determining background traffic transfer policy and apparatus
WO2019232681A1 (fr) * 2018-06-04 2019-12-12 Beijing Thomson Commerce Co., Ltd. Procédé pour la fourniture de services, et passerelle, support de stockage, et produit programme d'ordinateur associés

Also Published As

Publication number Publication date
MY157644A (en) 2016-07-15
WO2011049430A3 (fr) 2011-10-27

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