Using watermarking to reduce communication overhead

• US 7,987,369 B2
• Filed: 04/26/2005
• Issued: 07/26/2011
• Est. Priority Date: 03/03/2005
• Status: Expired due to Fees

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Chitrapu, Prabhakar R., Zhang, Guodong
• Primary Examiner(s): LaForgia; Christian
• Assistant Examiner(s): Schmidt; Kari L
• Application Number:
  US11/114,286
• Publication Number:
  US 20060200673A1
• Time in Patent Office: 2,282 Days
• Field of Search: 713/176, 713/181, 726/30, 380/202, 380/270
• US Class Current: 713/176
• CPC Class Codes: H04L 63/126 the source of the received data
• CPC Class Codes: H04L 63/162 at the data link layer
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 80/00 Wireless network protocols or protocol adaptations to wireless operation

Abstract

A method for reducing overhead when transmitting an Internet Protocol (IP) packet begins by selecting a watermarking signature based on the IP address of the packet. The watermarking signature is applied to the packet and the IP address is removed from the packet. The packet is sent to a receiver, which looks up the IP address of the packet by using the watermarking signature. The watermarking signature can be a radio frequency watermarking signature or a digital watermarking signature. A similar method employing watermarking can be used to reduce medium access control header overhead.

Claims

1. A method for reducing overhead when transmitting an Internet Protocol (IP) packet, comprising:

selecting a watermarking signature based on the IP address of the packet using a translator;

removing the IP address from the packet and applying the watermarking signature to the packet, wherein the packet is without an IP address; and

transmitting the packet to a receiver.

2. The method according to claim 1, wherein the watermarking signature is a radio frequency watermarking signature.

3. The method according to claim 1, wherein the watermarking signature is a digital watermarking signature.

4. A transmitter configured to reduce overhead when transmitting an Internet Protocol (IP) packet, comprising:

an IP address to watermarking signature mapping book; and

an IP address to watermarking signature translator configured to examine the IP address of a packet, look up the IP address in the IP to watermarking signature mapping book, remove the IP address from the packet, and apply a watermarking signature corresponding to the IP address to the packet prior to transmitting the packet.

5. The transmitter according to claim 4, wherein the watermarking signature is a radio frequency watermarking signature.

6. The transmitter according to claim 4, wherein the watermarking signature is a digital watermarking signature.

7. A radio frequency (RF) watermarking transmitter, comprising:

a storage, configured to store a medium access control (MAC) header which does not have a user identification field and to store an assigned RF watermarking signature that replaces the user identification field, the signature being unique to the transmitter and including a user identifier;

a connection signaling device, configured to send the assigned RF watermarking signature and the MAC header to a receiver; and

a RF watermarking signature application device configured to apply the assigned RF watermarking signature to, and remove the user identification field from, data to be transmitted.

8. The transmitter according to claim 7, wherein the storage, connection signaling device, and RF watermarking signature application device are further configured to handle an RF watermarking signature created from a user identifier and a logical channel assignment.

9. A receiver configured to reduce overhead in wireless communications using Internet Protocol (IP) packets, comprising:

a watermarking signature to IP address mapping book; and

a watermarking signature to IP address translator configured to examine a watermarking signature of a received packet, look up the watermarking signature in the watermarking signature to IP mapping book to retrieve an IP address of the received packet, and add the IP address to the received packet prior to forwarding the received packet.

10. The receiver according to claim 9, wherein the watermarking signature is a radio frequency watermarking signature.

11. The receiver according to claim 9, wherein the watermarking signature is a digital watermarking signature.

12. A receiver configured to use radio frequency (RF) watermarking to reduce medium access control (MAC) layer signaling in wireless communications, comprising:

a RF watermarking signature extractor, configured to remove an assigned RF watermarking signature from a received packet, decode the assigned RF watermarking signature to determine a user identifier and insert the determined user identifier in a MAC header, whereby the user identifier was replaced by the assigned watermarking signature.

13. The receiver according to claim 12, wherein the RF watermarking signature extractor is further configured to decode the assigned RF watermarking signature to determine an assigned logical channel.