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Sidevõrgud IRT 0020 loeng 5 27. sept. 2005

Sidevõrgud IRT 0020 loeng 5 27. sept. 2005. Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst. avo.ots@ttu.ee. WiMAX. Large Coverage. Network Simplicity. WiFi. 3G. Full Mobility. QoS. Technology &Services. Erivajadused Avatud keskkond Juhtmevaba.

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Sidevõrgud IRT 0020 loeng 5 27. sept. 2005

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  1. SidevõrgudIRT 0020loeng 5 27. sept. 2005 Avo Otstelekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst.avo.ots@ttu.ee

  2. WiMAX Large Coverage Network Simplicity WiFi 3G Full Mobility QoS Technology &Services

  3. Erivajadused Avatud keskkond Juhtmevaba Võrgukasutus • Kasutus • Trust • Security • Efficiency

  4. TCP: guarantee: deliver all data; no guarantee: rate, delay; connection; congestion control UDP: no guarantee: deliver all data, order, delay; no connection; no congestion control

  5. Channels broadcast to all UE in the cell BaseStation (BS) UserEquipment (UE) P-CCPCH- Primary Common Control Physical ChannelSCH - Sync Channel P-CPICH - Primary Common Pilot ChannelS-CPICH - Secondary Common Pilot Channel(s) Paging Channels S-CCPCH - Secondary Common Control Physical Channel PICH - Page Indication Channel Random Access and Packet Access Channels PRACH - Physical Random Access Channel AICH - Acquisition Indication Channel PCPCH - Common Physical Packet Channel AP-AICH - Acquisition Preamble Indication Channel CD/CA-AICH - Collision Detection Indication Channel CSICH - CPCH Status Indication Channel Dedicated Connection Channels DPDCH - Dedicated Physical Data Channel DPCCH - Dedicated Physical Control Channel F-PDSCH - Physical Downlink Shared Channel WCDMA kanalid

  6. Channel Sharing Techniques Static Channelization Channel Sharing Techniques Scheduling Dynamic Medium Access Control Random Access

  7. Classification of Multiple Access Protocols Multiple access protocols Contention-based Conflict-free Collision resolution Random access TREE, WINDOW, etc ALOHA, CSMA, BTMA, ISMA, etc FDMA, TDMA, CDMA, Token Bus, DQDB, etc BTMA: Busy Tone Multiple Access ISMA: Internet Streaming Media Alliance DQDB: Distributed Queue Dual Bus

  8. Throughput 0.368 Slotted Aloha S 0.184 Aloha G

  9. http://www.isi.edu/nsnam/ns/

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