Resource Management in Satellite Networks part 3 pptx

... Board IBR Information Bit Rate ICMP Internet Control Message Protocol IEEE Institute of Electrical and Electronics Engineers IETF Internet Engineering Task Force IFR Increasing Failure Rate IM Inter-Modulation IMT ... Internet Protocol over Satellite ISDN Integrated Services Digital Network ISI Integral Satcom Initiative ISLs Inter -Satellite Links ISN Interactive Satellite Network ISO/O...

Ngày tải lên: 05/07/2014, 19:20

... for managing inter-domain communications with neighbor QoS brokers, so that QoS-enabled transport services are implemented in a coordinated way across various domains. Since IntServ requires resource ... distribution and satellite content delivery to mobile terminals (either broadcast or multicast) are interesting working areas. Clearly, reception is mainly possible when the satellite...

Ngày tải lên: 05/07/2014, 19:20

... combining, etc., are discussed in the scenario of satellite systems. What is interesting in our context is the overview of cross-layer design methods employed in satellite systems, in particular ... transmission rate being used at the link layer. Moreover, the network layer can gain by looking both up and down the stack in order to obtain route diversity and multilink routing, w...

Ngày tải lên: 05/07/2014, 19:20

... start threshold (ssthresh). In particular, each sending end-system probes the network congestion by gradually increasing the window of transmitted segments (outstanding in the network) until the ... presence of timeouts [22], thus allowing for a greater accuracy at higher PER, resulting in: throughput = MSS RT T  2bq 3 + RT O min  1, 3  3bq 8  q (1 + 32 q 2 ) (9.4) where b is t...

Ngày tải lên: 05/07/2014, 19:20

... approach, 31 6 Cross-layer design, 35 , 36 , 45, 96, 105, 214, 221, 256, 270, 31 3, 31 4 Explicit cross-layer, 35 , 36 , 133 , 145, 156, 164, 30 0, 31 5 Implicit cross-layer, 35 , 36 , 45, 95, 217, 270, 290, 31 5, ... handover, 53, 189, 195, 214, 233 Inter -satellite handover, 54, 190, 194, 214 Intra -satellite handover, 54, 190, 191, 214 CDMA, 14 Channel quality indicator, 138...

Ngày tải lên: 05/07/2014, 19:20

... Control Number: 200792 234 9 ISBN 0 -38 7 -36 897 -3 e-ISBN 0 -38 7- 539 91 -3 ISBN 978-0 -38 7 -36 897-9 e-ISBN 978-0 -38 7- 539 91-1 Printed on acid-free paper. ¤ 2007 Springer Science+Business Media, LLC ... (Chapter 4), the two following parts are conceived according to the ETSI SES/BSM protocol stack, thus distinguishing cross-layer issues involving satellite- dependent laye...

Ngày tải lên: 05/07/2014, 19:20

... handover calls . . . . . 233 7.4 Conclusions 234 References 237 Part III Cross-Layer Techniques for Satellite- Independent Layers 8 RESOURCE MANAGEMENT AND NETWORK LAYER 2 43 8.1 Introduction . . . . ... . . . . . 134 5 .3. 1 Survey of scheduling techniques . . . . . . . . . . . . . . . . . . . . 134 5 .3. 2 Scheduling techniques for HSDPA via satellite . . . . . . . 139 5 .3....

Ngày tải lên: 05/07/2014, 19:20

... to satellite to Earth and back) since layer 2 control functions are in the Earth station. In case of GEO regenerating satellites, RTD varies in the range 239 -280 ms. In particular, RTD is 239 .6 ... system, but the greater the difficulty in acquiring and maintaining synchronism. Time access to the satellite link can be managed either in centralized or in distributed mode. Cen...

Ngày tải lên: 05/07/2014, 19:20

... 1/4, 1 /3, 2/5, 1/2, 3/ 5, 2 /3, 3/ 4, 4/5, 5/6, 8/9 and 9/10, depending on the adopted modulation and the system requirements. In particular, coding rates 1/4, 1 /3 and 2/5 are used, combined with ... time-frequency resources (according to an MF-TDMA air interface) to the requesting terminals. The Return Channel Satellite Terminal (RCST) transmission capacity is constrained. According...

Ngày tải lên: 05/07/2014, 19:20

... of lower layer air interfaces [33 ]. A Broadband Satellite Multimedia (BSM) network is divided into 5 domains, as specified in ETSI TR 101 984 [32 ]: • User Domain, representing the group of end-users; • ... Chapter 1: INTRODUCTION TO SATELLITE COMMUNICATIONS 29 Fig. 1.9: Examples for the use of satellite links in telecommunication networks. interworking, to define a new network ar...

Ngày tải lên: 05/07/2014, 19:20