Wireless data communication system

• US 20030026248A1
• Filed: 07/31/2002
• Published: 02/06/2003
• Est. Priority Date: 08/01/2001
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Hiroki, Shigeru
• Granted Patent: US 7,151,746 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 1/1848 Time-out mechanisms
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/19 at layers above the network layer network arrangements for networked applications for scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04L 47/28 in relation to timing considerations
• CPC Class Codes: H04L 47/29 using a combination of thresholds
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/28 Timers or timing mechanisms used in protocols
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06
• CPC Class Codes: H04W 28/10 Flow control between communication endpoints
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 80/06 Transport layer protocols, e.g. TCP [Transport Control Protocol] over wireless transmission control protocol/Internet protocol [TCP/IP] or user datagram protocol [UDP] H04L69/16

Abstract

When a CRC error is detected by a PIAFS protocol controller during data transferring, the PIAFS protocol controller starts a resynchronization sequence and informs a TCP/IP protocol controller of starting of resynchronization. In the TCP/IP protocol controller, when the starting of resynchronization is informed after a retransmission timer is started, the retransmission timer is stopped temporarily, and, in a condition that the retransmission timer is stopped temporarily, completion of resynchronization is informed from the PIAFS protocol controller, the retransmission timer which was stopped temporarily is re-started.

Claims

1. A communication system comprising:

timer means for waiting response from a recipient; and

higher order layer protocol control means for extending said timer means in accordance with data regarding a wireless data transfer protocol from a lower order layer protocol controller.

2. A system according to claim 1, wherein said higher order layer protocol control means extends said timer means in accordance with the data outputted from said lower order layer protocol controller, depending upon an error in the wireless data transfer protocol.

3. A system according to claim 1, wherein said higher order layer protocol control means extends said timer means in accordance with the data outputted from said lower order layer protocol controller, depending upon resynchronization in the wireless data transfer protocol.

4. A system according to claim 1, wherein said higher order layer protocol control means has retransmission means for re-transmitting the data to the recipient after a time period for waiting the response from the recipient is elapsed.

5. A system according to claim 1, wherein said higher order layer protocol control means has interruption means for interrupting a link to the recipient after a time period for waiting the response from the recipient is elapsed.

6. A system according to claim 1, wherein said lower order layer protocol controller effects communication with respect to an access point connected via a first network, and said higher order layer protocol control means waits the response from the recipient connected said first network, said access point and a second network.

7. A communication system comprising:

timer means for waiting response from a recipient; and

higher order layer protocol control means for stopping said timer means in accordance with data regarding a wireless data transfer protocol from a lower order layer protocol controller.

8. A system according to claim 7, wherein said higher order layer protocol control means extends said timer means in accordance with the data outputted from a wireless data transfer protocol controller, depending upon resynchronization in the wireless data transfer protocol.

9. A communication system comprising:

lower order layer protocol control means for controller a wireless data transfer protocol; and

higher order layer protocol control means for extending a time period for waiting response from a recipient in accordance with data regarding a wireless data transfer protocol from said lower order layer protocol control means.

10. A system according to claim 9, wherein said higher order layer protocol control means extends the time period for waiting the response from the recipient in accordance with the data outputted from said lower order layer protocol control means, depending upon resynchronization in the wireless data transfer protocol.

11. A method for controlling a higher order layer protocol, comprising the steps of:

waiting response from a recipient; and

extending a time period for waiting the response from the recipient in accordance with data regarding a wireless data transfer protocol from a lower order layer protocol controller.

12. A method according to claim 11, wherein said extending step includes extending the time period for waiting the response from the recipient in accordance with data outputted from a wireless data transfer protocol controller, depending upon an error in the wireless data transfer protocol.

13. A method according to claim 11, wherein said extending step includes extending the time period for waiting the response from the recipient in accordance with the data outputted from said lower order layer protocol controller, depending upon resynchronization in the wireless data transfer protocol.

14. A method according to claim 11, wherein said waiting step includes a re-transmitting step for re-transmitting the data to the recipient after the time period for waiting the response from the recipient is elapsed.

15. A method according to claim 11, wherein said waiting step includes an interrupting step for interrupting a link to the recipient after the time period for waiting the response from the recipient is elapsed.

16. A method according to claim 11, wherein said lower layer protocol controller effects communication with respect to an access point connected via a first network, and said waiting step waits the response from the recipient connected said first network, said point and a second network.

17. A control program for controlling a higher order layer protocol, comprising the steps of:

waiting response from a recipient; and

extending a time period for waiting the response from the recipient in accordance with data regarding a wireless data transfer protocol from a lower order layer protocol controller.

18. A program according to claim 17, wherein said extending step includes extending the time period for waiting the response from the recipient in accordance with the data outputted from said lower order layer protocol controller, depending upon resynchronization in the wireless data transfer protocol.