Mobile handset power conservation using connection-release buffering

• US 8,520,694 B1
• Filed: 07/31/2009
• Issued: 08/27/2013
• Est. Priority Date: 07/31/2009
• Status: Active Grant

• Current Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Bali, Soshant
• Primary Examiner(s): Ferris, Derrick
• Assistant Examiner(s): SMARTH, GERALD A
• Application Number:
  US12/533,733
• Time in Patent Office: 1,488 Days
• Field of Search: 370/428
• US Class Current: 370/428
• CPC Class Codes: H04L 12/12 Arrangements for remote connection or disconnection of substations or of equipment thereof
• CPC Class Codes: H04W 76/38 triggered by timers
• 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
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Disclosed is a method and system in which a connection-release buffer is provided in a communication path over which data is transmitted between a computing device (such as a server) and a mobile station. Upon receiving a final packet, indicating that the server has no more data to send to the mobile station, the buffer operates to determine whether a set period of time has elapsed since the last application-data packet was either sent to or received from the mobile station. If so, the buffer retains the final packet until detecting that the mobile station is in connected mode, at which point the buffer forwards the final packet to the mobile station. If not, the buffer forwards the final packet to the mobile station without first buffering the final packet pending detection of the mobile station being in connected mode.

Claims

1. A method of using connection-release buffering, the method comprising:

(a) a connection-release buffer monitoring application-data packets sent between a mobile station and a server, wherein the connection-release buffer is situated in a communication path between the mobile station and the server, wherein the communication path includes a wireless link between the mobile station and at least one base station;

(b) while monitoring the application-data packets, the connection-release buffer resetting a timer in response to detecting each such application-data packet;

(c) while monitoring the application-data packets, the connection-release buffer receiving from the server a final packet; and

responsively;

(i) checking the timer;

(ii) if the timer has expired, buffering the final packet until detecting that the mobile station is in a connected mode, at which point the connection-release buffer responsively forwards the final packet to the mobile station; and

(iii) if the timer has not expired, forwarding the final packet to the mobile station without first buffering the final packet pending detection of the mobile station being in the connected mode.

2. The method of claim 1, further comprising the connection-release buffer sending a first acknowledgment packet to the server in response to receiving the final packet.

3. The method of claim 2, further comprising the connection-release buffer receiving a second acknowledgment packet, wherein the mobile station sends the second acknowledgment packet to the connection-release buffer in response to receiving the final packet.

4. The method of claim 3, further comprising the connection-release buffer discarding the second acknowledgment packet.

5. The method of claim 1, wherein the final packet comprises a signal indicating that the server does not have any more data to send to the mobile station.

6. The method of claim 1, wherein the timer has a reset value substantially equal to a reset value of a mobile station inactivity timer, wherein the mobile station resets the mobile station inactivity timer each time the mobile station sends or receives an application-data packet, and wherein the mobile station transitions from the connected mode to an idle mode upon expiration of the mobile station inactivity timer.

7. The method of claim 1, wherein the connected mode comprises the mobile station in connection with a network.

8. The method of claim 7, wherein when the mobile station receives the final packet, the mobile station terminates the connection with the network.

9. The method of claim 8, wherein the termination of the connection with the network comprises termination of a TCP connection release phase.

10. The method of claim 1, wherein each of the application-data packets is a TCP packet.

11. A connection-release buffer, comprising:

a transceiver;

a processor;

data storage; and

program instructions stored in the data storage and executable by the processor for carrying out functions including;

(a) the connection-release buffer monitoring application-data packets sent between a mobile station and a server, wherein the connection-release buffer is situated in a communication path between the mobile station and the server, wherein the communication path includes a wireless link between the mobile station and at least one base station;

(b) while monitoring the application-data packets, the connection-release buffer resetting a timer in response to detecting each such application-data packet; and

(c) while monitoring the application-data packets, the connection-release buffer receiving from the server a final packet; and

responsively;

(i) checking the timer;

(ii) if the timer has expired, buffering the final packet until detecting that the mobile station is in a connected mode, at which point the connection-release buffer responsively forwards the final packet to the mobile station; and

(iii) if the timer has not expired, forwarding the final packet to the mobile station without first buffering the final packet pending detection of the mobile station being in the connected mode.

12. The connection-release buffer of claim 11, wherein the connection-release buffer sends a first acknowledgment packet to the server in response to receiving the final packet.

13. The connection-release buffer of claim 12, wherein the connection-release buffer receives a second acknowledgment packet, wherein the mobile station sends the second acknowledgment packet to the connection-release buffer in response to receiving the final packet.

14. The connection-release buffer of claim 13, wherein the connection-release buffer discards the second acknowledgment packet.

15. The connection-release buffer of claim 11, wherein the final packet comprises a signal indicating that the server does not have any more data to send to the mobile station.

16. The connection-release buffer of claim 11, wherein the timer has a reset value substantially equal to a reset value of a mobile station inactivity timer, wherein the mobile station resets the mobile station inactivity timer each time the mobile station sends or receives an application-data packet, and wherein the mobile station transitions from the connected mode to an idle mode upon expiration of the mobile station inactivity timer.

17. The connection-release buffer of claim 11, wherein the connected mode comprises the mobile station in connection with a network.

18. The connection-release buffer of claim 11, wherein when the mobile station receives the final packet, the mobile station terminates the connection with the network.

19. The connection-release buffer of claim 18, wherein the termination of the connection with the network comprises termination of a TCP connection release phase.

20. The connection-release buffer of claim 11, wherein each of the application-data packets is a TCP packet.