By Pascal Berthou
This e-book deals the reader the keys for a profitable figuring out, integration and utilization of satellite tv for pc structures as well as subsequent iteration terrestrial networks. The DVB-S2/RCS approach is used to demonstrate the mixing demanding situations. The presentation makes use of a process method, i.e. it tackles the terrestrial and satellite tv for pc telecommunication structures’ complexity with a excessive point technique, targeting the platforms’ parts and on their interactions. numerous situations current the various paths that may be for the combination of satellite tv for pc structures in terrestrial networks. caliber of carrier administration options in terrestrial and satellite tv for pc platforms and the suggestions to aid them to interoperate are supplied. Inter-system mobility strategies and function difficulties are then addressed. The options proposed during this ebook were constructed in the framework of ecu and French funded examine tasks and confirmed with simulated or genuine testbeds.
Preview of Satellite and Terrestrial Hybrid Networks (Iste) PDF
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Extra resources for Satellite and Terrestrial Hybrid Networks (Iste)
The following result is thus obtained: T* = T2 + T3 + Tm2; – T’ = time taken between the last packet being received by the MN in the previous network and the first packet received by the tunnel between the HA and MN (and not by the FMIPv6 tunnel between the PAR and NAR). This notation is specific to FMIPv6; – D = delay in transfer of packets received by the MN between T and T* (or for FMIPv6 between T and T’ when T’ exists); – D’ = delay in transfer of packets received by the MN between T’ and T*; – D* = delay in transfer of packets received by the MN after T*. When it is indicated that a delay or a time is ≈ 0, this indicates that it is very low, around several milliseconds at most. We will now analyze in detail the results for each protocol separately. five. four. 2. 1. Mobile IPv6 Regarding Mobile IPv6, it can be noted that the results are divided into three rows. The first row shows the use of Mobile IPv6 without route optimization (RO) or the RRT. In this case, when it moves outside the home network, the MN must receive an RA, continue to the DAD and then exchange a BU/BACK with its HA. The mobility of MN is thus fully transparent for the CN which continues to send packets to the home address of the MN. The packets are, therefore, intercepted by the HA which channels them to the current position of the MN. However, the delay in the transfer of the packets is still 600 ms, even when the MN and CN are behind the same ST (after movement 3) which seems highly unsuitable. This delay is, therefore, incompatible with audio and video conversations. Consequently, it is highly advisable to use MobileIPv6 with RO in the case of movement involving a satellite system. Table 5. 1. Evaluations regarding Mobile IPv6 cellular IPv6 no RO with DAD cellular IPv6 with RO and RRT with DAD 1st Move Interruption hold up time after handover Tm1 = 600 D = 600 ms ms T = 2225 ms Tm1 = 600 ms Tm2 = 2400 ms T = 2225 ms T* = 4025 ms cellular T3 = 25 ms IPv6 with Tm1 = 600 RO and ms RRT with Tm2 = 2400 confident ms DAD T = 725 ms T* = 2525 ms D = 600 ms D* = 300 ms 2nd Move Interruption hold up time after handover Tm1 = 600 D = 600 ms ms T = 2225 ms Tm1 = 600 ms Tm2 = 2400 ms T = 4025 ms T* = 4025 ms D = 600 T3 = 25 ms ms Tm1 = 600 D* = 300 ms ms Tm2 = 2400 ms T = 2525 ms T* = 2525 ms D = 300 ms D* = 300 ms 3rd Move Interruption hold up time after handover Tm1 = 600 D = 600 ms ms T = 2225 ms Tm1 = 600 ms Tm2 = 1800 ms T = 3425 ms T* = 3425 ms D = 300 T3 = 25 ms ms Tm1 = 600 D* = 300 ms ms Tm2 = 1800 ms T = 1925 ms T* = 1925 ms 4th Move Interruption time T3 = 25 ms Tm1 ≈ 0 ms T = 125 ms D ≈ 0 ms T3 = 25 ms D* ≈ 0 Tm1 ≈ 0 ms ms Tm2 = 1200 ms T = 1325 ms T* = 1325 ms D ≈ 0 ms T3 = 25 ms D* ≈ 0 Tm1 ≈ 0 ms ms Tm2 = 1200 ms T = 1325 ms T* = 1325 ms In the event where RO is used (second row), the RRT procedure is considered as compulsory for the security reasons already mentioned. The interruption time differs depending on the type of movement considered: – after movement 1, the MN must receive an RA (25 ms), proceed to the DAD (1,500 ms), exchange an initial BU/BACK with its HA (600 ms), carry out the RRT (home test (init) (HoTi/HoT) and care-of test (init) (CoTi/CoT) in parallel: 1,200 ms) and then exchange a second BU/BACK with the CN (600 ms).