Traffic Aware Authors: Date: /28/2006 6/28/2006

Traffic Aware Authors: Date: 2006-06-28 6/28/2006 6/28/2006
doc.: IEEE /0912r0 6/28/2006 Traffic Aware Authors: Date: Notice: This document has been prepared to assist IEEE It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures < ieee802.org/guides/bylaws/sb-bylaws.pdf>, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE Working Group. If you have questions, contact the IEEE Patent Committee Administrator at Junping Zhang,Huawei Junping Zhang,Huawei

6/28/2006 doc.: IEEE /0912r0 6/28/2006 Abstract We discuss traffic aware WLAN firstly, then give some suggestions to meet the requirements of traffic aware. In addition, present some proposals about how to proceed to work about traffic aware for WLAN. Junping Zhang,Huawei Junping Zhang,Huawei

Outline The motivation of traffic aware Our solutions of traffic aware
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Outline The motivation of traffic aware Our solutions of traffic aware Conclusions Feedback Junping Zhang,Huawei Junping Zhang,Huawei

Motivation of Traffic Aware
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Motivation of Traffic Aware An overview of current WLAN and Mesh mechanism One channel is shared by many wireless devices in WLAN The traffic can steadily be classed as different category in WLAN according to e Routing has to be used in Mesh Some problems may occur in WLAN and Mesh In case of mass video traffic, maybe data traffic have no chance to access WLAN 802.11e and routing need to work in harmony Load balance needs to be considered Traffic aware may alleviate the situation Junping Zhang,Huawei Junping Zhang,Huawei

Our Solutions for Traffic Aware
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Our Solutions for Traffic Aware Adaptive QoS adjusting Adaptive traffic differentiation Adaptive priority of traffic Adaptive retry count of traffic Multiple routing for the same pair <source, destination> according to different metric Different metric for different traffic Metric including multiple route quality Junping Zhang,Huawei Junping Zhang,Huawei

Adaptive QoS adjusting
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Adaptive QoS adjusting voice MPEG4 DATA Each VBR frame has different weightiness. For example, each MPEG4 frame can be tagged with one of the I, B or P frames. In case of network saturation state, the priority and retry count of the less weightiness frame such as B frames can be changed ,when transmission failed they can be discarded without retransmission This is significant for WLAN which more traffic needs access in saturation state. Frame tagged I Frame B Frame P Frame Adaptive priority 0 for Voice 1 for I 2 for B 1 for P 1 for DATA Adaptive retry count 4 for DATA 4 for Voice 4 for I 0 for B 4 for P Junping Zhang,Huawei Junping Zhang,Huawei

Simulation Simulation scenario Simulation tool Simulation parameters
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Simulation Simulation scenario Simulation tool NS (tool) configuration Simulation parameters Node configuration Traffic load configuration Simulation results Junping Zhang,Huawei Junping Zhang,Huawei

Scenario One AP Twelve stations
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Scenario One AP Twelve stations Three traffics from station to AP for each station Simulation time is 100s Junping Zhang,Huawei Junping Zhang,Huawei

Simulation Tool (NS2) Configuration
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Simulation Tool (NS2) Configuration Parameters Configuration Channel type Channel/WirelessChannel Radio-propagation model Propagation/TwoRayground Network interface type Phy/WirelessPhy Mac type MAC/802.11e Link layer type LL Antenna model Antenna/OmniAntenna Max packet in ifq 50 routing protocol AODV Junping Zhang,Huawei Junping Zhang,Huawei

Node Configuration MAC/PHY Parameters Parameters Configuration
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Node Configuration MAC/PHY Parameters Parameters Configuration SlotTime 9us CCATime 4us RxTxTurnaroundTime 2us SIFSTime 16us PreambleLength 120bits PLCPHeaderLength 40 bits PLCPDataRate 6Mbps PropagationDelay 1us basicRate 1Mbps dataRate Junping Zhang,Huawei Junping Zhang,Huawei

Traffic Configuration
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Traffic Configuration Initial value The type of traffic Rate Mathematical model Retry count Priority high Voice 128 kbps ON/OFF 4 VBR 500 kbps MPEG-4 1 Data 2 Mps CBR 2 low Junping Zhang,Huawei Junping Zhang,Huawei

Traffic Configuration (cont’d)
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Traffic Configuration (cont’d) Parameters changed when network being saturated The type of traffic Rate Mathematical model Retry count Priority Voice 128 kbps ON/OFF 4 VBR I frame 500 kbps MPEG-4 1 P Frame B Fame 2 Data 2 Mps CBR Parameters reset when saturation expired Junping Zhang,Huawei Junping Zhang,Huawei

6/28/2006 doc.: IEEE /0912r0 6/28/2006 Simulation Results There are only Voice and VBR traffic in this simulation. Compared with 11e, the Voice throughput of new adaptive priority mechanism increased by 75.11%, and the Voice throughput of new adaptive priority combined with adaptive retry limit increased by 96.44%. Compared with 11e, the VBR throughput of new adaptive priority mechanism decreased by only 4.5%, and the Voice throughput of new adaptive priority combined with adaptive retry limit decreased by 16.65%. Junping Zhang,Huawei Junping Zhang,Huawei

Simulation Results (cont’d)
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Simulation Results (cont’d) There are Voice, Data and VBR traffic in this simulation. Compared with 11e, the total throughput, Voice, and Data throughput of the new mechanisms are all improved. The VBR throughput is decreased. But it only sacrifices few of its bandwidth for other traffic types. Junping Zhang,Huawei Junping Zhang,Huawei

Simulation Results (cont’d)
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Simulation Results (cont’d) There are Voice, VBR and Data traffic in this simulation. Compared with 11e, the VBR latency of new 11s adaptive priority mechanism increased by 17.93%, and the VBR latency of new 11s adaptive priority combined with adaptive retry limit decreased by 52.87%. Junping Zhang,Huawei Junping Zhang,Huawei

Solution in Mesh for Traffic Aware Routing
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Solution in Mesh for Traffic Aware Routing A case of traffic aware routing The motivation of traffic aware routing The mechanism of traffic aware routing The simulation results Junping Zhang,Huawei Junping Zhang,Huawei

An overview of an actual case
6/28/2006 doc.: IEEE /0912r0 6/28/2006 An overview of an actual case Junping Zhang,Huawei Junping Zhang,Huawei

The Motivation of Traffic Aware Routing
6/28/2006 doc.: IEEE /0912r0 6/28/2006 The Motivation of Traffic Aware Routing Logical Independent Route Different traffic use different route Benefits Load balance Traffic Diff-Serv, guarantee QoS for different traffic How to design the algorithm Different metric for different traffic Metric including multiple route quality Multiple routing based on DSR  Traffic Aware DSR (TA-DSR) Junping Zhang,Huawei Junping Zhang,Huawei

The mechanism of multiple metric
6/28/2006 doc.: IEEE /0912r0 6/28/2006 The mechanism of multiple metric begin Packet tagged with priority Different packet has different routing metric according to priority of the packet Metric can be made by many methods packet Traffic priority Priority=0 Priority=1 priority=3 Priority=2 Metric = w0 Metric = w1 Metric = w2 Metric = w3 Route cache Packet transmit End Junping Zhang,Huawei Junping Zhang,Huawei

Different Metric(cont’d)
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Different Metric(cont’d) W0=Hops for voice W1 = 1·Min_Bw+ 1·PDR for video 1 W2 = 2·Min_Bw+ 2·PDR for video 2 W3 = ·Max_Load+ ·Min_Bw+·PDR for best effort data Hops ：the number of hops in a route Min_Bw : the minimum residual bandwidth for a node in a route PDR : packet delivery ratio (the success ) Max_Load : the maximum load of the node in a route  1,  1,  2,  2, , ,  : the weighting factors Junping Zhang,Huawei Junping Zhang,Huawei

6/28/2006 doc.: IEEE /0912r0 6/28/2006 Simulation Scenario We use standard quasi-static grid scenario as follows: We add new random flows in random time with random priority Junping Zhang,Huawei Junping Zhang,Huawei

Simulation Tool (NS2) Configuration
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Simulation Tool (NS2) Configuration Parameters Configuration Channel type Channel/WirelessChannel Radio-propagation model Propagation/TwoRayground Network interface type Phy/WirelessPhy Mac type MAC/802.11e Link layer type LL Antenna model Antenna/OmniAntenna Max packet in ifq 50 Routing protocol RM-AODV (Sizeprobe= 44byte, data rate=1packet/s and Statistic time=10s) / Traffic Aware DSR Junping Zhang,Huawei Junping Zhang,Huawei

Node Configuration The node configuration is reference to 802.11b [1]
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Node Configuration The node configuration is reference to b [1] Parameters Configuration SlotTime 20us CCATime 15us RxTxTurnaroundTime 5us SIFSTime 10us PreambleLength 144bits PLCPHeaderLength 48 bits PLCPDataRate 1Mbps PropagationDelay 2us basicRate dataRate 11Mbps Junping Zhang,Huawei Junping Zhang,Huawei

Other Configuration Experienced configuration Traffic configuration
6/28/2006 doc.: IEEE /0912r0 6/28/2006 Other Configuration Experienced configuration 1=0.5, 1=0.5,  2=0.5,  2=0.5, =-0.1, =0.4, =0.5 The value of statistic time for computing Min_BW and PDR is 4s Traffic configuration Traffic Type Packet Size (byte) Priority Voice 128 Video 1 1280 1 Video 2 2 Data 1500 3 Junping Zhang,Huawei Junping Zhang,Huawei

6/28/2006 doc.: IEEE /0912r0 6/28/2006 Simulation Results In left figure, the average network throughput of TA-DSR is 1173kbps, increased by 18.7%, and RM-AODV is 988kbps In right figure, the average network throughput of TA-DSR is 1871kbps, increased by 32.1%, and RM-AODV is 1416kbps Junping Zhang,Huawei Junping Zhang,Huawei

6/28/2006 doc.: IEEE /0912r0 6/28/2006 Conclusion Traffic aware can make more traffic access to WLAN in saturation state Through traffic aware, load balance and QoS guarantee can be obtained in mesh Traffic aware need be considered for WLAN and Mesh Junping Zhang,Huawei Junping Zhang,Huawei

6/28/2006 doc.: IEEE /0912r0 6/28/2006 References IEEE Std b, Supplement to Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Higher-speed Physical Layer Extension in the 2.4 GHz b-1999, 1999. IEEE e/D4.0, Draft Supplement to Part 11: Wireless Medium Access Control (MAC) and physical layer (PHY) specifications: Medium Access Control (MAC) Enhancements for Quality of Service (QoS). s-joint-seemesh-wimesh-proposal-to tgs.doc Junping Zhang,Huawei Junping Zhang,Huawei

6/28/2006 doc.: IEEE /0912r0 6/28/2006 Q&A Junping Zhang,Huawei Junping Zhang,Huawei

Traffic Aware Authors: Date: /28/2006 6/28/2006

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