CA2558459A1 - Optimizing the delivery of low-latency data for constantly active stations in virtual lans - Google Patents

Optimizing the delivery of low-latency data for constantly active stations in virtual lans Download PDF

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Publication number
CA2558459A1
CA2558459A1 CA002558459A CA2558459A CA2558459A1 CA 2558459 A1 CA2558459 A1 CA 2558459A1 CA 002558459 A CA002558459 A CA 002558459A CA 2558459 A CA2558459 A CA 2558459A CA 2558459 A1 CA2558459 A1 CA 2558459A1
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Canada
Prior art keywords
local area
virtual local
latency
access point
low
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.)
Granted
Application number
CA002558459A
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French (fr)
Other versions
CA2558459C (en
Inventor
Victor J. Griswold
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.)
Cisco Technology Inc
Original Assignee
Cisco Technology, Inc.
Victor J. Griswold
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
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Publication of CA2558459A1 publication Critical patent/CA2558459A1/en
Application granted granted Critical
Publication of CA2558459C publication Critical patent/CA2558459C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

A method a system and a computer program for an access point to provide immediate delivery of low-latency data packets to one virtual local area network when there are one or more associated stations operating in Power-Save-Protocol on another virtual local area network. The access point observes all the virtual local area networks to which it provides access to associated stations. The access point then determines which of the virtual local area networks contains only active stations. The access point then tracks the virtual local area network having only active stations and immediately transmits to the network incoming multicast/broadcast data packets. Quality of packet data transmissions is improved, in particular, low-latency transmissions (i.e. VOIP transmissions and transmissions for stations in constantly active mode), since the packets for said transmissions are not buffered at the access point, but delivered immediately after reception, whereas packet for otheer transmissions (i.e. for station in Power save mode) are first stored and then delivered when requested by the corresponding stations. In particular, the method, computer program and system is implemented for low latency multicast/broadcast data packets being the destinations certain stations in different VLANS.

Claims (27)

1. A method for an access point to provide immediate delivery of low-latency multicast/broadcast data packets to at least one of a plurality of virtual local area networks, the steps comprising:
monitoring, at the access point, all virtual local area networks comprising at least one station associated with the access point;
determining, on at least one of the plurality of virtual local area networks, all associated stations supporting low-latency data transmission;
identifying the at least one virtual local area network having all associated stations supporting low-latency data transmission; and transmitting low-latency multicast/broadcast data packets immediately to the at least one virtual local area network having all associated stations supporting low-latency data transmission.
2. The method of claim 1, wherein the access point is an 802.11 access point.
3. The method of claim 1, wherein each station supporting low-latency data transmission is in 802.11 constantly active operation.
4. The method of claim 1, further comprising the step of identifying at least one virtual local area network having at least one associated station supporting high-latency data packets
5. The method of claim 4, wherein each high-latency associated station is in 802.11 power-save protocol operation.
6. The method of claim 5, further comprising the step of buffering the multicast/broadcast data packets for the at least one virtual local area network having the at least one associated station in power-save protocol operation.
7. The method of claim 6, further comprising the step of transmitting the buffered multicast/broadcast data packets with a data traffic indicator mark.
8. The method of claim 1, wherein the associated station is a portable personal computer.
9. The method of claim 1, wherein the associated station is a personal data assistant.
10. In a network comprising at least one access point, a plurality of virtual local area networks and a plurality of associated stations, a system for automatically optimizing delivery of low-latency multicast/broadcast data packets over at least one of the virtual local area networks, comprising means adapted for monitoring, at the access point, all virtual local area networks comprising at least one station associated with the access point;
means adapted for determining, on at least one of the plurality of virtual local area networks, all associated stations supporting low-latency data transmission;
means adapted for identifying the at least one virtual local area network having all associated stations supporting low-latency data transmission; and means adapted for transmitting low-latency multicast/broadcast data packets immediately to the at least one virtual local area network having all associated stations supporting low-latency data transmission.
11. The system of claim 10 wherein the access point is an 802.11 access point.
12. The system of claim 10 wherein each low-latency associated station is in 802.11 constantly active operation.
13. The system of claim 10, further comprising means adapted for identifying at least one virtual local area network having at least one associated station supporting high-latency data packets.
14. The system of claim 13, wherein each high-latency associated station is in 802.11 power-save protocol operation.
15. The system of claim 14, further comprising means adapted for buffering the multicast/broadcast data packets for the at least one virtual local area network having the at least one associated station in power-save protocol operation.
16. The system of claim 15, further comprising means adapted for transmitting the buffered multicast/broadcast data packets with a data traffic indicator mark.
17. The system of claim 10, wherein the associated station is a portable personal computer.
18. The system of claim 10, wherein the associated station is a personal data assistant.
19. A computer program product having a computer readable medium having computer program logic recorded thereon for performing a computer implemented method for an access point to provide immediate delivery of low-latency data packets to at least one of a plurality of virtual local area networks, the steps comprising:
monitoring, at the access point, all virtual local area networks comprising at least one station associated with the access point;
determining, on at least one of the plurality of virtual local area networks, all associated stations supporting low-latency data transmission;
identifying the at least one virtual local area network having all associated stations supporting low-latency data transmission; and transmitting low-latency multicast/broadcast data packets immediately to the at least one virtual local area network having all associated stations supporting low-latency data transmission.
20. The computer implemented method of claim 19, wherein the access point is an 802.11 access point.
21. The computer implemented method of claim 19, wherein each low-latency data transmission supporting station is in 802.11 constantly active operation.
22. The computer implemented method of claim 19, further comprising the step of identifying at least one virtual local area network having at least one associated station supporting high-latency data packets
23. The computer implemented method of claim 22, wherein each high-latency associated station is in 802.11 power-save protocol operation.
24. The computer implemented method of claim 23, further comprising the step of buffering the multicast/broadcast data packets for the at least one virtual local area network having the at least one associated station in power-save protocol operation.
25. The computer implemented method of claim 24, further comprising the step of transmitting the buffered multicast/broadcast data packets with a data traffic indicator mark.
26. The computer implemented method of claim 19, wherein the associated station is a portable personal computer.
27. The computer implemented method of claim 19, wherein the associated station is a personal data assistant.
CA2558459A 2004-03-11 2005-01-18 Optimizing the delivery of low-latency data for constantly active stations in virtual lans Expired - Fee Related CA2558459C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/798,040 2004-03-11
US10/798,040 US7489648B2 (en) 2004-03-11 2004-03-11 Optimizing 802.11 power-save for VLAN
PCT/US2005/001329 WO2005096555A1 (en) 2004-03-11 2005-01-18 Optimizing the delivery of low-latency data for constantly active stations in virtual lans

Publications (2)

Publication Number Publication Date
CA2558459A1 true CA2558459A1 (en) 2005-10-13
CA2558459C CA2558459C (en) 2010-12-07

Family

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Family Applications (1)

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CA2558459A Expired - Fee Related CA2558459C (en) 2004-03-11 2005-01-18 Optimizing the delivery of low-latency data for constantly active stations in virtual lans

Country Status (6)

Country Link
US (1) US7489648B2 (en)
EP (1) EP1735960B1 (en)
CN (1) CN1930827B (en)
AU (1) AU2005229612B2 (en)
CA (1) CA2558459C (en)
WO (1) WO2005096555A1 (en)

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Also Published As

Publication number Publication date
CN1930827B (en) 2010-12-08
WO2005096555A1 (en) 2005-10-13
CN1930827A (en) 2007-03-14
US7489648B2 (en) 2009-02-10
EP1735960A1 (en) 2006-12-27
CA2558459C (en) 2010-12-07
US20050201341A1 (en) 2005-09-15
AU2005229612B2 (en) 2009-05-21
AU2005229612A1 (en) 2005-10-13
EP1735960B1 (en) 2018-07-11

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