Download PDF by Mazliza Othman: Principles of Mobile Computing and Communications

By Mazliza Othman

ISBN-10: 1420061593

ISBN-13: 9781420061598

Creation cellular Computing purposes Evolution of instant Networks and providers precis mobile community structure UMTS structure Public Land cellular community Interfaces consumer Authentication Frequency Reuse Channel project place Registration and replace Handover tactics CDMA The movement towards 3G Networks instant neighborhood quarter Networks IEEE 802.11 average IEEE 802.11b general (Wi-Fi) IEEE 802.11a Read more...

summary: creation cellular Computing purposes Evolution of instant Networks and prone precis mobile community structure UMTS structure Public Land cellular community Interfaces person Authentication Frequency Reuse Channel task situation Registration and replace Handover systems CDMA The circulation towards 3G Networks instant neighborhood zone Networks IEEE 802.11 average IEEE 802.11b regular (Wi-Fi) IEEE 802.11a usual IEEE 802.11g commonplace HIPERLAN/2 IEEE 802.1x regular IEEE 802.11i ordinary IEEE 802.11e general protection concerns IP over 802.11 WLAN Integrating 802.11 WLAN and UMTS precis W

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Physical random access channel (PRACH): Used to carry RACH. Physical common packet channel: Used to carry the CPCH. The downlink physical channel is classified into dedicated downlink physical channel and the common downlink physical channel. There is only one type of dedicated downlink physical channel—the downlink dedicated physical channel (downlink DPCH). Downlink DPCH is a time multiplex of a downlink DPDCH and a downlink DPCCH. Common pilot channel (CPICH): A fixed rate 30-kbps channel that carries predefined bit sequences.

28 Principles of Mobile Computing and Communications MAP-PrepareSubsequentHandover request MSC-B → MSC-A It contains the new MSC number (MSC-A), new cell identity, and the complete A-HandoverRequired or A-HandoverRequest message. MAP-PrepareSubsequentHandover response MSC-A → MSC-B Returned after MSC-A has assigned a new radio channel. It contains the complete A-Handover-Request-Ack. MAP-Process-AccessSignaling request MSC-B → MSC-A To forward A-Handover-Detect received by MSC-B from the correct MS.

It provides a contention-free transmission through a point coordinator, which is a function performed by an AP. It is a master-slave approach, where the point coordinator is a polling master that coordinates all stations and determines which one can access the medium. Different QoS levels are supported through the use of a priority-polling mechanism. PCF has a higher priority than DCF and it may start transmission after a duration PCF interframe space (PIFS), where PIFS is less than DIFS and PIFS is greater than SIFS.

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Principles of Mobile Computing and Communications by Mazliza Othman

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