OPTIMIZING STATIC DICTIONARY USAGE FOR SIGNAL COMPRESSION AND FOR HYPERTEXT TRANSFER PROTOCOL COMPRESSION IN A WIRELESS NETWORK

• US 20110176491A1
• Filed: 04/04/2011
• Published: 07/21/2011
• Est. Priority Date: 11/13/2006
• Status: Active Grant

• Current Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Inventors: Wuthnow, Mark S., Kwong, Kennie Y., Stafford, Matthew, Rosenberg, William
• Granted Patent: US 8,868,788 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC

Abstract

A method includes receiving a registration request including a first dictionary definition. The registration request is associated with user equipment. The method includes transmitting to the user equipment a response including a second dictionary definition. The method includes transmitting subsequent messages to the user equipment if the first and second dictionary definitions agree, the subsequent messages being compressed using the first static dictionary.

Claims

1. A method comprising:

receiving a registration request including a first dictionary definition, the registration request being associated with user equipment;

transmitting to the user equipment a response including a second dictionary definition; and

transmitting subsequent messages to the user equipment if the first and second dictionary definitions agree, the subsequent messages being compressed using the first static dictionary.

2. The method as recited in claim 1, wherein the response comprises an indicator of a location for obtaining a second static dictionary corresponding to the second dictionary definition when the first and second dictionary definitions do not agree.

3. The method as recited in claim 1, wherein the registration request includes authentication credentials for the user equipment.

4. The method as recited in claim 1, wherein the response comprises an unauthorized message.

5. The method as recited in claim 4, further comprising:

receiving a second registration request including credentials for the user equipment.

6. The method as recited in claim 1, wherein the second dictionary definition corresponds to a dictionary definition different from the first dictionary definition.

7. The method as recited in claim 1, wherein the first dictionary definition comprises a first version number of a first static dictionary and the second dictionary definition comprises a second version number of the first static dictionary.

8. The method as recited in claim 7, further comprising:

transmitting the second static dictionary to the user in response to a user request for the second static dictionary.

9. The method as recited in claim 1, wherein the response comprises an authentication challenge message indicating at least the second dictionary definition as an available dictionary.

10. The method as recited in claim 2, further comprising:

transmitting changes between a first version of a static dictionary and a second version of the static dictionary to the user in response to a user request for the second static dictionary.

11. The method as recited in claim 1, further comprising:

the user equipment decompressing a received data signal in accordance with one of a static dictionary or a decompression algorithm;

the user equipment storing one of a static dictionary or a decompression algorithm according to a unique identifier of the static dictionary or decompression algorithm;

the user equipment retrieving the associated static dictionary or the decompression algorithm; and

if the decompression algorithm or static dictionary is not stored in memory by a unique identifier, requesting an associated static dictionary or algorithm used to create the received data signal from a remote location.

12. A method of decompressing a HyperText Transfer Protocol (HTTP) message portion comprising:

storing a common message phrase in a static dictionary in memory of a virtual machine;

receiving the HTTP message portion including address data in place of the common message phrase;

applying a decompression algorithm to the HTTP message portion; and

replacing the address data in the message portion with the common phrase retrieved from the memory.

13. The method as recited in claim 12 wherein the replacing includes indexing a look-up table of the static dictionary to retrieve the common phrase.

14. A system comprising:

a network platform configured to maintain a database registry of compression applications including at least one compression and decompression algorithm, at least one static dictionary, and respective algorithm and static dictionary identifiers, wherein the network platform comprises;

a data transceiver configured to receive and transmit data signals;

a memory configured to store the database registry; and

a controller configured to determine a compression and decompression algorithm and corresponding identifier or a static dictionary and corresponding identifier for transmission by the data transceiver from the database registry in response to a request for a particular compression application.

15. The system as recited in claim 14 wherein at least one of the respective algorithm and static dictionary identifiers comprises a bytecode identifier representing a bytecode associated with the particular compression application.

16. The system as recited in claim 15 wherein the particular compression application comprises a hash of the bytecode.

17. The system as recited in claim 14 wherein the database registry includes a HyperText Transfer Protocol (HTTP) compression algorithm, the HTTP compression algorithm comprising an associated static dictionary for common phrases of a message portion of HTTP.

18. The system as recited in claim 14 wherein the network platform is shared by a plurality of wireless networks.

19. The system as recited in claim 14 wherein the network platform is redundantly provided within a wireless network.

20. The system as recited in claim 14 further comprising:

a virtual machine for use in a wireless network comprising;

a decompression controller configured to control decompression of a received data signal in accordance with a static dictionary or a decompression algorithm;

a memory configured to store a static dictionary or a decompression algorithm according to a unique identifier of the static dictionary or decompression algorithm; and

the decompression controller being configured to determine the unique identifier and retrieve the associated static dictionary or the decompression algorithm in response to a received data signal and being configured to request a unique identifier and associated static dictionary or algorithm used to create the received data signal from a remote location if the decompression algorithm or static dictionary is not stored in memory by a unique identifier.

21. The system as recited in claim 20 wherein the remote location comprises the network platform.

22. The system as recited in claim 20 wherein the remote location comprises a proxy call session control function.

23. The system of claim 20 further comprising a mobile device including the virtual machine.