Retransmit PowerPoint PPT Presentations

Why do you think the TCP designers chose not to perform a fast retransmit after ... the indicated link costs, use Dijkstra's shortest path algorithm to compute the ...

Either side can tear down connection using FIN sequence. ... handle bursty traffic well (Drop Tail queue management), this could increase the ...

Benchmarks ... Benchmarks Packet Loss ... Benchmarks Trip Time ...

1. TCP Slow Start, Congestion Avoidance, Fast Retransmit and Fast Recovery ... provides reliable, cost ... to have good shaped Timers. Duplicated ACKs ...

Last time Fast retransmit 3 duplicate ACKs Flow control Receiver windows Connection management SYN/SYNACK/ACK, FIN/ACK, TCP states Congestion control

Tahoe TCP added Slow-Start, Congestion Avoidance, and Fast Retransmit Algorithms ... Protocols that retransmit all unacknowledged data at a single time can overwhelm ...

Suppress duplicated ACK and retransmit lost packets. TCP. Snoop module. 11. Introduction (cont?) ... packets needed to be retransmitted, decrease the state by 1 ...

Wireless devices connected in close proximity to each other. Intranet. Private corporate network ... Repeaters and Hubs. Amplify signals and retransmit them. 27 ...

Let window edge is first packet receiver wants to see ... The sender needs to set timers in order to know when to retransmit a packet that ...

SACK can retransmit more (RFC 3517) ... ACK vector: SACK (runlength encoded) Init Cookie: protection ... larger initial window / window scaling option, TCP SACK ...

Reno? New-Reno?SACK TCP. Change Fast Retransmit to include Fast Recovery. New-Reno?SACK TCP improve the performance when multiple packets lost in the same ...

Fast retransmit ... Fast recovery and fast retransmit work together to ensure lost packets are dealt ... a packet was mistakenly retransmitted it would not be ...

If collision: retransmit pkt in future slots with probability p, until successful. ... If no collision detected, consider packet delivered. ...

provide logical communication between app processes running on different hosts ... sender retransmits current pkt if ACK/NAK garbled ...

Selective Repeat ARQ ... Selective Repeat retransmits only an individual frame ... Selective Repeat outperforms GBN and S&W, but efficiency drops as error rate ...

Provides a completely reliable (no data duplication or loss), connection ... If delays occur, retransmits not sent needlessly. Keep a smoothed running average of RTT ...

Wireless &Mobile Communications Chapter 7: Mobile Transport Layer Motivation TCP-mechanisms Indirect TCP Snooping TCP Mobile TCP Fast retransmit/recovery

(4) FIN = Finish: A tells B that it closes the 'half-connection' from A to B; (5) B acks ... A waits in case B retransmits FIN and A must ack again. UCB. State ...

long delay before resending lost packet. Detect lost segments via duplicate ACKs. ... fast retransmit: resend segment before timer expires. 22 ...

Fast retransmit. Trigger retransmission after 3 duplicate ACKs. Fast recovery. After fast retransmit, cut CongestionWindow in half rather than dropping ...

receiver's advertised window - determined by available buffer space at the receiver ... fast retransmit occurs when a packet is lost, but latter packets get through ...

http://www.horizon-teleports.com/tv-contribution.html A contribution link permits broadcasters to transport video programming by satellite from a remote source such as a Satellite news gathering (SNG) unit to a broadcaster's studio or from a studio to our Teleport / uplink Centre. With the advantage of its access to a number of satellites, Horizon Teleports can retransmit programs from any part of the region.

If collision: retransmit pkt in future slots with probability p, until successful. ... Jam signal: make sure all other transmitters are aware of collision; 48 bits; ...

Karn/Partridge, set Timeout to double each time a retransmit occurs. TCP/IP over AAL5 ... Hard Real Time Difficult to implement, packets must arrive or there ...

TCP Slow Start, Congestion, Avoidance, Fast Retransmit, and ... detect incipient congestion. decide which connections to notify of congestion at the gateway ...

Avoids the retransmit timeout when a SYN/ACK packet is dropped. ... if that packet is dropped or marked, the sender waits for a retransmit timeout. ...

Specifies a modification to RFC 3168 to allow TCP SYN/ACK packets to be ECN-Capable. ... Avoids the retransmit timeout when a SYN/ACK packet would have been dropped. ...

incrementally develop sender, receiver sides of reliable data transfer protocol (rdt) ... requires countdown timer. retransmits if no ACK received in this time ...

Si hay colisi n. Cada usuario retransmite de forma independiente en un tiempo aleatorio ... No es el caso porque la retransmisi n proviene de una transmisi n previa ...

After three duplicate acks, assume packet loss, data still flowing ... New Reno still only retransmits one ... Problem is still shrinkage of congestion window ...

sender retransmits current pkt if ACK/NAK garbled ... TL: rdt2.1: receiver, handles garbled ACK/NAKs. 43. TL: rdt2.1: discussion. Sender: ...

We'll focus initially on the transport-network connection, and see how UDP handles it ... Knowing when to retransmit needs a countdown timer ...

ACK generation for non-INVITE. Some ... UA state machinery retransmits 2xx and ACK ... BYE can't be sent by UAS until ACK received. CR or LF alone deprecated ...

sender retransmits current pkt if ACK/NAK garbled ... TL: rdt2.1: receiver, handles garbled ACK/NAKs. 42. TL: rdt2.1: discussion. Sender: ...

Alex C. Snoeren and Hari Balakrishnan, 'An End-to-End Approach to Host Mobility' ... fast retransmit occurs when a packet is lost, but latter packets get through ...

High Speed Wireless LANs. Why High Speed LANs? Office LANs used to provide basic connectivity ... Repeater regenerates and retransmits each bit ...

Can retransmit FIN ACK. if it is lost. closed. close. close. 21. Katz, Stoica F04. Reliable Transfer ... SYN, FIN establishing/terminating a TCP connection ...

No retransmits barring fiber error. 3 million packets/sec/switch ... Antenna state change in 100 us 100 us elapsed time to most antennas ...

Retransmitting lost/corrupted packets is not worthwhile ... Sender retransmits lost or corrupted data. Timeout based on estimates of round-trip time ...

Network type (100baseT, Wireless, etc.) Slot type: ... Devices: Repeater, hub. Counter attenuation. Unintelligent retransmit signal to all devices ...

A site that wants to transmit information must wait until the token arrives. When the site completes its round of message passing, it retransmits the token. ...

If bandwidth is allocated and enforced properly, no congestion should occur. ... No time wasted to retransmit. Link errors not confused with congestion ...

Solution [Karn/Partridge]: ignore RTT values from retransmits ... Craig Partridge, Research Director for the Internet Research Department at BBN Technologies: ...

University of Tokyo. Objectives of Data Reservoir / GRAPE-DR(1) ... University of Tokyo. Example Case of 8 IPG. Success on Fast Retransmit ...

... receive an ACK of its FIN, it will retransmit FINs until A responds as long as ... TimeWait expires then a given late arriving FIN might be part of any one of a ...

top-10 list of important ... sender retransmits current pkt if ACK/NAK garbled ... rdt2.1: sender, handles garbled ACK/NAKs. Wait for call 0 from above ...

If a timeout occurs before receiving an ACK, the sender retransmits the frame ... If frame size = 1 KB, and N=3, then can have 3 outstanding packets, 3/8 of BW, ...

sender retransmits current pkt if ACK/NAK garbled. sender adds sequence number to each pkt ... rdt2.1: sender, handles garbled ACK/NAKs. Wait for call 0 from above ...

top-ten list of important ... sender retransmits current packet if ACK/NAK garbled ... rdt2.1: sender, handles garbled ACK/NAKs. Wait for call 0 from above ...

Approach: Say the burden of detecting the error lies on ... When it detects that frame has been lost, it requests the sender to retransmit. Does this suffice? ...

When it detects a corrupt frame, it requests the sender to retransmit. ... it first transmits a 32-bit jamming sequence and then stops the transmission. ...

CIS 203 07 : TCP Traffic Control

Title: Comparison of various TCP Implementation over Congested ATM Link Author: Ahmed Ishtiaq Last modified by. Created Date: 6/4/2001 1:24:44 AM

Packet 1's reordering length is the difference between the greatest SACKed/ACKed ... Reordering length sample life time is 80s ...

Title: The TCP Segment Header Last modified by: CIS Computer Dept Document presentation format: On-screen Show Other titles: Times New Roman Gothic StarSymbol Arial ...

Pode ter uma ou v rias redes. ... OSPF ou rota est tica Internet Cisco FastEthernet0 189.0.0.1/29 Eth0 189.0.0.2/29 Eth1 10.255.0.254/24 MyAuth3 Switch de ...