Methods for achieving target loss ratio
A method of forwarding data transmissions from a first network to a third network via a second network comprises receiving packets of a first type from the first network, segmenting each packet into packets of a second type that are transmitted to the second network, and producing and transmitting at least one encoded duplicate of each of the packets of a second type to the second network to allow a packet of the first type to be recreated in the event that not all the packets of the second type are received. In the event that a sufficient number of the packets of a second type and the encoded duplicate packets are not received to recreate the packet of a first type, the method determines a loss ratio that represents the number of packets not recreated relative to the number of packets transmitted during a selected time interval.
1. A method of transmitting Transmission Control Protocol (TCP) data segments related to a TCP session between a source end-station and a destination end-station over a network via an encoded TCP channel between two fixed intercepting network devices, intercepting network device A and intercepting network device B, said method comprising:
establishing said encoded TCP channel between said fixed intercepting network devices using a native TCP between said fixed intercepting network devices, said intercepting network device A being interposed between said source end-station and the network, said intercepting network device B being interposed between the destination end-station and the network,
said intercepting network device A:
intercepting a TCP data segment from said TCP session,
segmenting and encoding said intercepted TCP data segment at a packet encoding level and transmitting the encoded segments to intercepting network device B,
receiving a recommended packet encoding level for said TCP session,
setting the packet encoding level to a minimum level between said recommended packet encoding level and a highest unlocked packet encoding level,
performing a first sequence of analyzing one or more of the goodput, throughput, sequence numbers, segments, transaction and state of said native TCP performance and calculating performance measurements based on said analysis,
setting the packet encoding level to said recommended encoding level,
performing a second sequence of analyzing one or more of the goodput, throughput, sequence numbers, segments, transaction and state of said native TCP performance and calculating performance measurements based on said analysis,
comparing said first and second sequences of performance measurements include round trip time (RTT) and goodput, and
determining said second sequence of performance measurements is same or better than said first sequence of performance measurements,
setting the packet encoding level to said recommended encoding level for a predetermined amount of time based on the determined said second sequence of performance measurements is same or better than said first sequence measurements,
determining said second sequence of performance measurements is neither same nor better than said first sequence of performance measurements,
banning said recommended and higher packet encoding levels based on the determined said second sequence of performance measurements is neither same nor better than said first sequence of performance measurements, and
unlocking lowest of banned packet encoding levels after expiration of a predetermined time period.
2. The method of claim 1 which include unlocking one or more of said banned packet encoding levels, starting from the lowest locked level, when a second TCP session is terminated.
3. A data transmission network for transmitting Transmission Control Protocol (TCP) data segments related to a TCP session between a source end-station and a destination end-station over the data transmission network via an encoded TCP channel between two fixed intercepting network devices, intercepting network device A and intercepting network device B, both of which contain a hardware processor or other hardware to implement the functions described herein, the data transmission network comprising:
said encoded TCP channel established between said fixed intercepting network devices using a native TCP between said fixed intercepting network devices, said intercepting network device A being interposed between said source end-station and the data transmission network, said intercepting network device B being interposed between the destination end-station and the data transmission network, said intercepting network device A:
intercepting a TCP data segment from said TCP session,
segmenting and encoding said intercepted TCP data segment at a packet encoding level and transmitting the encoded segments to intercepting network device B,
receiving a recommended packet encoding level for said TCP session,
setting the packet encoding level to a minimum level between said recommended packet encoding level and a highest unlocked packet encoding level,
performing a first sequence of analyzing one or more of the goodput, throughput, sequence numbers, segments, transaction and state of said native TCP performance and calculating performance measurements based on said analysis,
setting the packet encoding level to said recommended encoding level,
performing a second sequence of analyzing one or more of the goodput, throughput, sequence numbers, segments, transaction and state of said native TCP performance and calculating performance measurements based on said analysis,
comparing said first and second sequences of performance measurements include round trip time (RTT) and goodput, and
determining said second sequence of performance measurements is same or better than said first sequence of performance measurements,
setting the packet encoding level to said recommended encoding level for a predetermined amount of time based on the determined said second sequence of performance measurements is same or better than said first sequence measurements,
determining said second sequence of performance measurements is neither same nor better than said first sequence of performance measurements,
banning said recommended and higher packet encoding levels based on the determined said second sequence of performance measurements is neither same nor better than said first sequence of performance measurements, and
unlocking lowest of banned packet encoding levels after expiration of a predetermined time period.
4. The data transmission network of claim 3 in which one or more of said banned packet encoding levels is unlocked, starting from the lowest locked level, when a second TCP session is terminated.