Method of dormant data session reactivation

• US 20060227783A1
• Filed: 04/12/2005
• Published: 10/12/2006
• Est. Priority Date: 04/12/2005
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility, Inc. (Lenovo Group Ltd.)
• Inventors: Gross, Joel L.
• Granted Patent: US 7,668,097 B2
• Time in Patent Office: Days
• US Class Current: 370/392
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 69/28 Timers or timing mechanisms used in protocols
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0238 where the received signal is an unwanted signal, e.g. interference or idle signal
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for dormant data session reactivation may include a packet control function (118) in a radio access network (104) receiving a first data packet (150) having a source IP address (152), where the first data packet has a destination IP address (152) addressed to reactivate a dormant mobile station (102) coupled to the radio access network. The packet control function may receive a plurality of subsequent data packets (160) having the source IP address, where each of the plurality of subsequent data packets has a subsequent destination IP address (162, 164, 166) and a corresponding time stamp (163, 165, 167). For each of the subsequent destination IP addresses that are substantially sequential, evaluating an absolute value of a slope (270) of the difference between the subsequent destination IP addresses that are substantially sequential over a difference in the corresponding time stamps. If the absolute value of the slope is less than a threshold function (280), denying the first data packet and preventing reactivation of the dormant mobile station by the first data packet.

Claims

1. A method for dormant data session reactivation, comprising:

a packet control function in a radio access network receiving a first data packet having a source IP address, wherein the first data packet has a destination IP address coupled to reactivate a dormant mobile station coupled to the radio access network;

the packet control function receiving a plurality of subsequent data packets having the source IP address, wherein each of the plurality of subsequent data packets has a subsequent destination IP address and a corresponding time stamp;

for each of the plurality of subsequent data packets, the packet control function comparing the subsequent destination IP address and the corresponding time stamp; and

if at least a portion of the subsequent destination IP addresses are substantially sequential, and if an absolute value of a difference between each of the at least a portion of subsequent destination IP addresses that are sequential for a given difference in the corresponding time stamps is less than a threshold function, denying the first data packet.

2. The method of claim 1, further comprising if at least a portion of the subsequent destination IP addresses are substantially sequential and if the absolute value of the difference between each of the at least a portion of subsequent destination IP addresses that are sequential for a given difference in the corresponding time stamps is less than a threshold function and greater than a second threshold function, denying the first data packet.

3. The method of claim 1, wherein denying the first data packet comprises preventing the first data packet from reactivating the dormant mobile station.

4. The method of claim 1, wherein comparing the plurality of subsequent IP packets and the corresponding time stamps comprises, for each of the at least a portion of the subsequent destination IP addresses that are substantially sequential, evaluating an absolute value of a slope of the difference between the subsequent destination IP addresses that are substantially sequential over a difference in the corresponding time stamps.

5. The method of claim 1, wherein the radio access network is a CDMA network.

6. The method of claim 1, further comprising converting each of the subsequent destination IP addresses into an ordinal numeric representation.

7. The method of claim 1, further comprising if at least a portion of the subsequent destination IP addresses are substantially sequential and if an absolute value of a difference between each of the at least a portion of subsequent destination IP addresses that are substantially sequential for a given difference in the corresponding time stamps is less than a threshold function, denying the plurality of subsequent data packets.

8. A method for dormant data session reactivation, comprising:

a packet control function in a radio access network receiving a first data packet having a source IP address, wherein the first data packet has a destination IP address coupled to reactivate a dormant mobile station coupled to the radio access network;

the packet control function receiving a plurality of subsequent data packets having the source IP address, wherein each of the plurality of subsequent data packets has a subsequent destination IP address and a corresponding time stamp;

for each of the subsequent destination IP addresses that are substantially sequential, evaluating an absolute value of a slope of the difference between the subsequent destination IP addresses that are substantially sequential over a difference in the corresponding time stamps; and

if the absolute value of the slope is less than a threshold function, denying the first data packet.

9. The method of claim 8, wherein if the absolute value of the slope is not less than the threshold function, sending the first packet to the dormant mobile station.

10. The method of claim 8, wherein if the absolute value of the slope is less than a threshold function and greater than a second threshold function, denying the first data packet.

11. The method of claim 8, wherein denying the first data packet comprises preventing the first data packet from reactivating the dormant mobile station.

12. The method of claim 8, wherein the radio access network is a CDMA network.

13. The method of claim 8, further comprising converting each of the subsequent destination IP addresses into an ordinal numeric representation.

14. The method of claim 8, further comprising if the absolute value of the slope is less than a threshold function, denying the plurality of subsequent data packets.

15. A method for dormant data session reactivation, comprising:

a packet control function in a radio access network receiving a first data packet having a source IP address, wherein the first data packet has a destination IP address coupled to reactivate a dormant mobile station coupled to the radio access network;

the packet control function receiving a plurality of subsequent data packets having the source IP address, wherein each of the plurality of subsequent data packets has a subsequent destination IP address and a corresponding time stamp;

for each of the subsequent destination IP addresses that are substantially sequential, evaluating an absolute value of a slope of the difference between the subsequent destination IP addresses that are substantially sequential over a difference in the corresponding time stamps; and

if the absolute value of the slope is less than a threshold function, preventing the first data packet from reactivating the dormant mobile station.

16. The method of claim 15, wherein if the absolute value of the slope is less than a threshold function and greater than a second threshold function, preventing the first packet from reactivating the dormant mobile station.

17. The method of claim 15, wherein the radio access network is a CDMA network.

18. The method of claim 15, further comprising converting each of the subsequent destination IP addresses into an ordinal numeric representation.

19. The method of claim 15, further comprising if the absolute value of the slope is less than a threshold function, denying the plurality of subsequent data packets.

20. The method of claim 15, wherein if the absolute value of the slope is not less than the threshold function, sending the first packet to the dormant mobile station.