tailieunhanh - Resource Management in Satellite Networks part 15

Resource Management in Satellite Networks part 15. This book provides significant knowledge on innovative radio resource management schemes for satellite communication systems that exploit lower layer adaptivity and the knowledge of layer 3 IP QoS support and transport layer behavior. The book integrates competencies considering all the parts of system design: propagation aspects, radio resource management, access protocols, network protocols, transport layer protocols, and more, to cover both broadband and mobile satellite systems | 122 Giovanni Giambene Cristina Parraga Niebla Victor Y. H. Kueh Physical Channel Direction Description DPDCH Both Carries the DCH transport channel DPCCH Both Layer 1 control information for DPDCH PRACH Uplink Carries the RACH transport channel P-CPICH Downlink Phase reference for downlink channels S-CPICH Downlink Phase reference for dedicated downlink channels P-CCPCH Downlink Carries the BCH transport channel S-CCPCH Downlink Carries the FACH and PCH transport channels SCH Downlink Synchronization spot search AICH Downlink Acquisition indicators random access results PICH Downlink Paging indicators MICH Downlink MBMS indicators Physical Channels DPDCH Dedicated Physical Data Channel DPCCH Dedicated Physical Control Channel PRACH Physical Random Access Channel P-CPICH Primary Common Pilot Channel S-CPICH Secondary Common Pilot Channel P-CCPCH Primary Common Control Physical Channel S-CCPCH Secondary Common Control Physical Channel SCH Synchronization Channel AICH Acquisition Indicator Channel PICH Paging Indicator Channel MICH MBMS Indicator Channel Transport Channels DCH Dedicated Channel RACH Random Access Channel BCH Broadcast Channel FACH Forward Access Channel PCH Paging Channel Table Transport and physical channels. supported in the satellite air interface. RACH is characterized by open-loop power control and a collision risk in every transmission. RACH is crucial for the operation of the UMTS air interface since it is used not only for initial channel access to the network . call origination paging response and registration messages but also for sending short data bursts . Short Message Service SMS as investigated in the following simulative study. In 3GPP specifications 6 the PRACH transmission is based on a Slotted-ALOHA S-ALOHA approach with fast acquisition indication. The User Equipment UE can start the random access procedure at the beginning of a number of a well-defined time intervals called access slots by sending Chapter 5 ACCESS .