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IEEE 802.16 (WiMAX) Mesh Mode

IEEE 802.16 WiMAX Mesh NetworkingContentsIntroductions WiMAX IEEE 802.16 IEEE 802.16a PHY and MAC layer PMP Mode in IEEE 802.16 WiMAX Mesh Mode in IEEE 802.16 WiMAX Current State of the Art and Open Issues WiBroIntroductionWiMAX Worldwide Interoperability for Microwave Access A certification mark for products that pass conformity and interoperability tests Three Standards HIPERMAN Band : 2~11 GHz / IEEE 802.16a Band : 2~11 GHz / Throughput : ~75Mbps / Range : ~50Km WiBro Band : 2.3 GHz / Throughput : 30~50Mbps / Range : 1~5KmIntroductionIEEE 802.16 802.16.1 Defined the PMP mode Addressed the LOS problem employing OFDM with 10~66GHz 802.16.2 Minimized the interference between coexisting WMAN systems 802.16a (Jan. 2003) Introduce the mesh mode Support the NLOS capability / 2~11GHz Data Rate : ~75Mbps / Range : ~50Km 802.16d All the aforementioned versions serving the fixed BWA and their characteristics were incorporated 802.16e Support the Mobility Capacity (Seamless Handover Operation) pen Issues WiBroPMP Mode in IEEE 802.16 WiMAXFrame Format Frame Length : 0.5ms / 1ms / 2ms FCH : Binary Phase Shift Keying(BPSK) with coding rate ½ First DL Burst #1 : broadcast MAC management message DL-MAP : the access strategy to the DL channel DL-Descriptor : physical channel characteristicsPMP Mode in IEEE 802.16 WiMAXEnergy Management In the 802.16e, as the part to support the mobility Procedure MSS sends the request to BS BS responds with initial sleep window(Tmin), Final sleep window(Tmax) and listening window(L) In initial, MSS enters in the Sleep mode with Tmin In each Listening mode, check the MOB-TRF-IND from BSContentsIntroductions PHY and MAC layer PMP Mode in IEEE 802.16 WiMAX Mesh Mode in IEEE 802.16 WiMAX Frame Format Entry Process Scheduling in Control Subframe Scheduling in Data Subframe QoS Scheme for WiMAX Mesh Mode Current State of the Art and Open Issues WiBroMesh Mode in IEEE 802.16 WiMAXFrame Format Network Control Subframe Occurs periodically, with the period ect Sends MSH_NCFG:NetEntryOpen After receipt of MSH_NCFG:NetEntryOpen, a new node sends MSH_NENT:NetEntryActMesh Mode in IEEE 802.16 WiMAXStep 2 : Basic Capabilities Negotiation Negotiate the basic capabilities between the two nodes Handshaking of SBC_REQ and SBC_RSP Request the supporting capability of Physical parameters and bandwidth allocation Step 3 : Node Authorization Verify the new node validness for using the network resources and transmitting data The sponsor node has the role to relay the messages between the new node and the authorization node by tunneling over UDP/IPMesh Mode in IEEE 802.16 WiMAXStep 4 : Node Registration Obtain a unique node ID The sponsor node has the role to relay the messages between the new node and the registration node by tunneling over UDP/IP Step 5 : Supplementary Information Acquirement To perform higher layer operation The configuration file includes IP addresses of authentication node and registration nodeMesh Mode in IEEE 802.16 WiMAXStep 6 :ame Uncoordinated Distributed Scheduling The MSH_DSCH occurs in data subframe Serve the temporary communication between two nodes Based on a three-way-handshake mechanism Each node sends its available channel resource table to neighbor nodes using MSH_DSCH Sends out the MSH_DSCH:Request to acquire resource If collision, performs the random backoff algorithm MSH_DSCH:Grant The Granter evaluates the request through a slot allocation algorithm Includes the bandwidth grant MSH_DSCH:Grant confirmation All neighbor nodes are able to hear the MSH_DSCH messages Are aware of the reserved minislotsMesh Mode in IEEE 802.16 WiMAXQoS Scheme for WiMAX Mesh Mode MSH_DSCH message has the most important role In the distributed scheduling For different types of services, the interval should be different In IEEE 802.16 PMP Mode UGS : Unsolicited Grant Service rtPS : real-time Polling Service nrtPS : non-real-time Polling Service BE : Best Effort But, No QoS Schemes in the Mesh Mode !! The author proposedonsor selection scheme Mobility-aware sponsor selection scheme Slow mobility or highly predictive mobility Channel-awareness sponsor selection scheme Slot Allocation Algorithm Not in the standard Tradeoff among fairness, QoS and throughput maximization Considerations Scalability, Mobility, and realistic fading channel environmentCurrent State of the Art and Open IssuesTopology Control Basically, a new node selects the sponsor node with best signal quality Interference-aware sponsor selection scheme Mobility-aware sponsor selection scheme Slow mobility or highly predictive mobility Channel-awareness sponsor selection scheme Slot Allocation Algorithm Not in the standard Tradeoff among fairness, QoS and throughput maximization Considerations Scalability, Mobility, and realistic fading channel environmentContentsIntroductions PHY and MAC layer PMP Mode in IEEE 802.16 WiMAX Mesh Mode in IEEE 802.16 WiMAX Current State of the Art and Open Issues WiBro Standard Mobility Support QoS Classificaw}

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