【大学】信息通信专业 A critical review of Wireless mesh network

1、1A critical review of Wireless mesh networks: a survey The wireless team of NIC USTC整理课件2OutlinevIntroductionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical LayervMedium Access ControlvNetwork LayervTransport LayervApplication LayervCross-layer designvResearch TestbedsvCon

2、clusionvFuture work整理课件3InternetGatewayInternetInternetGatewayInternetIntroductionWhat is WMN?Extend coverageFacilitate deployment整理课件4OutlinevIntroductionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical LayervMedium Access ControlvNetwork LayervTransport LayervApplication

3、LayervCross-layer designvResearch TestbedsvConclusionvFuture work整理课件5WMNs Network Architecture vNetwork Architecture ClassificationBackboneClientsHybrid整理课件6Backbone整理课件7Clients整理课件8Hybrid整理课件9OutlinevIntroductionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical LayervMediu

4、m Access ControlvNetwork LayervTransport LayervApplication LayervCross-layer designvResearch TestbedsvConclusionvFuture work整理课件10CharacteristicsvMulti-hop wireless network vSupport for ad Hoc networking, and capability for selfforming, self-healing, and self-organization vMobility dependence on the

5、 application domains and on the radios vProviding both backhaul access to external networks and peer-to-peer (P2P) communication within the internal network vDependence of power-consumption constraints on applications vCompatible and interoperable with other wireless networks 整理课件11OutlinevIntroduct

6、ionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical LayervMedium Access ControlvNetwork LayervTransport LayervApplication LayervCross-layer designvResearch TestbedsvConclusionvFuture work整理课件12Application Scenarios vBroadband Home NetworkingvBuilding Automation vEnterprise

7、Networking vMetropolitan Area Networks vSecurity Surveillance Systems 整理课件13OutlinevIntroductionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical LayervMedium Access ControlvNetwork LayervTransport LayervApplication LayervCross-layer designvResearch TestbedsvConclusionvFutur

8、e work整理课件14Physical Layer vThe key functions of physical layer spectrum utilization robustness to interference, fading, and shadowing 整理课件15Phy-Open Research Issues vIt is still necessary to further improve the performance of physical layer techniques. vTo best utilize the advanced features provide

9、d by physical layer, higher layer protocols, especially MAC protocols, need to be re-designed. Otherwise, the advantages brought by such physical layer techniques will be significantly compromised 整理课件16OutlinevIntroductionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical La

10、yervMedium Access ControlvNetwork LayervTransport LayervApplication LayervCross-layer designvResearch TestbedsvConclusionvFuture work整理课件17Medium Access Control v Differences between Mesh mac and wireless macMAC for WMNs is concerned with more than one hop communication. MAC is distributed and coope

11、rative and works for multipoint-to-multipoint communication. Network self-organization is needed for the MAC. Mobility affects the performance of MAC. 整理课件18MAC LAYER- Open Research IssuesvScalable Single-Channel MACsvScalable Multi-Channel MACsvMAC/Physical Cross-Layer DesignvNetwork Integration in

12、 the MAC LayervMAC Protocol Implementation整理课件19OutlinevIntroductionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical LayervMedium Access ControlvNetwork LayervTransport LayervApplication LayervCross-layer designvResearch TestbedsvConclusionvFuture work整理课件20Network Layer vT

13、he routing protocol for WMNs must capture the following features: Performance Metrics. Fault tolerance with link failures. Load Balancing. Scalability. 整理课件21Network layer-Open Research IssuesvScalability.vBetter Performance MetricsvRouting/MAC Cross-Layer DesignvHybrid Routing整理课件22OutlinevIntroduc

14、tionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical LayervMedium Access ControlvNetwork LayervTransport LayervApplication LayervCross-layer designvResearch TestbedsvConclusionvFuture work整理课件23Transport Layer v Reliable Data Transport TCP variants v Non-Congestion Packet L

15、osses.v Unknown Link Failurev Network Asymmetryv Large RTT Variations New transport protocols整理课件24Transport Layer - Open Research IssuesvCross-layer Solution to Network AsymmetryvAdaptive TCP整理课件25OutlinevIntroductionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical LayervM

16、edium Access ControlvNetwork LayervTransport LayervApplication LayervCross-layer designvResearch TestbedsvConclusionvFuture work整理课件26Application Layer vNetwork Management vNetwork Configuration vAuthentication, Authorization, and Accounting 整理课件27Application Layer - Open Research IssuesvNetwork man

17、agement protocols vEffective data processing algorithms vHow to quickly determine network topology and the accurate location of a mesh node vDeveloping an efficient AAA system 整理课件28OutlinevIntroductionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical LayervMedium Access Con

18、trolvNetwork LayervTransport LayervApplication LayervCross-layer designvResearch TestbedsvConclusionvFuture work整理课件29Cross-Layer Designv Cross-layer design can be performed in two ways. Improve the performance of a protocol layer by considering parameters in other protocol layers Merge several prot

19、ocols into one component, e.g., in ad hoc networks, MAC and routing protocols can be combined into one protocol in order to closely consider their interactions整理课件30OutlinevIntroductionvWMNs Network Architecture vCharacteristicsvApplication ScenariosvPhysical LayervMedium Access ControlvNetwork Laye

20、rvTransport LayervApplication LayervCross-layer designvResearch TestbedsvConclusionvFuture work整理课件31Research Testbeds- AcademicvCarnegie-Mellon Universitys mobile ad hoc network testbedvMITs RoofnetvSUNY Stony BrookvCalifornia Institute for Telecommunications and Information Technology (Cal-(IT)2) vThe Broadband and Wireless Network (BWN) Lab at Georgia Tech整理课件32Industrial Practicev Microsoft Research Lab (MSR)v INTELv NORTEL:v Kiyon Inc整理课件33OutlinevIntroductionvWMNs Network Architecture vCharacterist