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Cs 552 Computer Networks Quality Of Service
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| bet | 7/12 | | Sana | 26.12.2023 | | Hajmi | 492 Kb. | | #128375 |
Bog'liq qos-f05 dinshinoslik 22, Iskandarov Q, 1655294334, Bosid 1, 6-LABORATORIYA ISHI (2), JEG5RUBbPbNgfcC9rMgOoPl7n9aOIdh3B1JVJm7q, 14-15-amaliy ish saidali, 14-15-amaliy ish (2), 1683197542, kommutatsiya-va-marshrutizatsiya, saiFsIn9nlAHbK1g3zAVwz2vphI0wcVyI9QHs5wd, 12, 1-amaliy mashg\'ulot - When R gets PATH message it knows
- Traffic characteristics (tspec): (r,b,R)
- Number of hops
- R sends back this information + worst-case delay in RESV
- Each router along path provide a per-hop delay guarantee and forward RESV with updated info
- In simplest case routers split the delay
Reservation Style - Motivation: achieve more efficient resource utilization in multicast (M x N)
- Observation: in a video conferencing when there are M senders, only a few can be active simultaneously
- Multiple senders can share the same reservation
- Various reservation styles specify different rules for sharing among senders
- Reservation style
- use filter to specify which sender can use the reservation
- Three styles
- Wildcard filter: does not specify any sender; all packets associated to a destination shares same resources
- Group in which there are a small number of simultaneously active senders
- Fixed filter: no sharing among senders, sender explicitly identified for the reservation
- Sources cannot be modified over time
- Dynamic filter: resource shared by senders that are (explicitly) specified
Wildcard Filter Example - Receivers: H1, H2; senders: H3, H4, H5
- Each sender sends B
- H1 reserves B; listen from one server at a time
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