Transmitting packets of data

• US 20060039294A1
• Filed: 08/27/2004
• Published: 02/23/2006
• Est. Priority Date: 08/18/2004
• Status: Active Grant

• Current Assignee: Ip Ot Sub Ulc
• Original Assignee: weComm Limited (Open Text Corporation)
• Inventors: Wentford, Timothy John, Sturrock, Oliver
• Granted Patent: US 7,551,649 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 41/0896 Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities flow or congestion control using dynamic resource allocation, e.g. in-call renegotiation, H04L47/76
• CPC Class Codes: H04L 43/0852 Delays
• CPC Class Codes: H04L 43/10 Active monitoring, e.g. heartbeat, ping or trace-route
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/11 Identifying congestion
• CPC Class Codes: H04L 47/12 Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 47/2416 Real-time traffic
• CPC Class Codes: H04L 47/25 with rate being modified by the source upon detecting a change of network conditions
• CPC Class Codes: H04L 47/283 in response to processing delays, e.g. caused by jitter or round trip time [RTT]
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/0273 adapting protocols for flow control or congestion control to wireless environment, e.g. adapting transmission control protocol [TCP] wireless network protocols or protocol adaptations to wireless operation, e.g. wireless application protocol H04W80/00
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

Data packet transmission involves transmitting a first data packet from a first station over a network to create a first transmission with the intention of the first transmission being received at a second station. Said first data packet is retransmitted from the first station to the second station to create a second transmission, wherein said second transmission of said first data packet includes latency information indicating the time between said first transmission and said second transmission. The second station processes said latency information to determine a resend latency measurement.

Claims

1. A network data transmission method, comprising the steps of:

transmitting a first data packet from a first station over a network to create a first transmission with the intention of said first transmission being received at a second station;

re-transmitting said first data packet from said first station to said second station to create a second transmission, wherein

said second transmission of said first data packet includes latency information indicating the time between said first transmission and said second transmission; and

, at said second station

processing said latency information to determine a resend latency measurement.

2. A method according to claim 1, wherein said first station retransmits said first data packet if an acknowledgement of said first data packet has not been received from said second station within a specified period of time.

3. A method according to claim 1, wherein said first station retransmits said first data packet if said second station has transmitted an indication that said first data packet has not been received.

4. A method according to claim 1, further including the steps of, at said second station:

identifying a condition to the effect that an anticipated transmission has not been received from said first station, and

increasing the measurement of said resend latency.

5. A method according to claim 1, further including the steps of, at said second station:

receiving a data packet from said first station that does not contain any data; and

decreasing the measurement of said resend latency.

6. A method according to claim 1, wherein said network includes a radio network.

7. A method according to claim 1, wherein said first station is a server.

8. A method according to claim 1, wherein said second station is one of a plurality of terminals.

9. A method according to claim 8, wherein said terminal is a mobile terminal or a radio device.

10. A radio network data transmission method, comprising the steps of:

transmitting a first data packet from a server over a radio network to create a first transmission with the intention of said first transmission being received by a mobile terminal;

re-transmitting said first data packet from said server to said terminal to create a second transmission if an acknowledgement of said first transmission has not been received by said server, wherein

said second transmission includes latency information indicating the time between said first transmission and said second transmission; and

, at said terminal

processing said latency information to determine a resend latency measurement.

11. A server configured to communicate with at least one terminal over a network, said server configured to:

transmit a first data packet to a terminal to create a first transmission with the intention of said first transmission being received by said terminal;

identifying a condition to the effect that said first transmission has not been received as intended;

calculating latency information indicating a measurement of time between said first transmission and a proposed re-transmission;

re-transmitting said first data packet to said terminal to create a second transmission, wherein

said latency information is included in said second transmission, such that said latency information may be processed by said terminal to determine a measurement of re-send latency.

12. A server according to claim 11, configured to communicate with a plurality of terminals.

13. A server configured to receive data over a network from at least one terminal, said server configured to:

receive a first data packet that includes latency information indicating the time between a first transmission of said first data packet and the received transmission of said first data packet, and

processing said latency information to determine a resend latency measurement.

14. A server according to claim 13 configured to communicate with a plurality of terminals.

15. A terminal configured to communicate with a server over a network, said terminal configured to:

transmit a first data packet to said server to create a first transmission with the intention of said first transmission being received by said server;

identify a condition to the effect that said first transmission has not been received as intended;

calculate latency information indicating a measurement of time between said first transmission and a proposed re-transmission;

retransmitting said first data packet to said server to create a second transmission, wherein

said latency information is included in said second transmission, such that said latency information may be processed by said server to determine a measurement of re-send latency.

16. A terminal according to claim 15, configured as a mobile terminal or a radio device.

17. A terminal configured to receive data over a network from a server, said terminal configured to:

receive a first data packet that includes latency information indicating the time between a first transmission of said first data packet and the received transmission of said first data packet, and

processing said latency information to determine a resend latency measurement.

18. A terminal according to claim 17, embodied as a mobile terminal or a radio device.

19. Instructions executable by a network of computers or programmable data processing devices such that when executing said instruction stations connection to said network will perform the steps of:

transmitting a first data packet from a first station over said network to create a first transmission with the intention of said first transmission being received at a second station; and

re-transmitting said first data packet from said first station to said second station over said network to create a second transmission, wherein

said second transmission of said first data packet includes latency information indicating the time between said first transmission and said second transmission; and

, at said second station

processing said latency information to determine a resend latency measurement.

20. Instructions executable by stations connected over a network such that, when executing said instructions, said stations will perform the steps of:

transmitting a first data packet from a first station over said network to create a first transmission with the intention of said first transmission being received by a second station;

re-transmitting said first data packet from said first station to said second station to create a second transmission if an acknowledgement of said first transmission has not been received by said first station, wherein

said second transmission includes latency information indicating the time between said first transmission and said second transmission; and

, at said second station

processing said latency information to determine a resend latency measurement.

21. A computer readable medium having machine readable instructions executable by a computer such that when executing said instructions a computer will perform the steps of

transmitting a first data packet to a networked device to create a first transmission with the intention of said first transmission being received by said networked device;

receiving an indication to the effect that said first transmission has not been received as intended;

calculating latency information indicating a measurement of latency between said first transmission and a proposed re-transmission;

re-transmitting said first data packet to said networked device to create a second transmission, wherein

said latency information is included in said second transmission, such that said latency information may be processed by said networked device to determine a measurement of re-send latency.

22. A computer readable medium having machine-readable instructions executable by a computer such that when executing said instructions a computer will perform the steps of

receiving a first data packet that includes latency information indicating the time between a first transmission of said first data packet and the received transmission of said first data packet, and

processing said latency information to determine a resend latency measurement.