System and method for transferring echo cancellation data

Abstract

A system for transferring echo cancellation data is provided. The system includes an echo cancellation element, which has echo cancellation algorithm data that has been determined for a predetermined telecommunications channel. The system also includes another echo cancellation element. An echo cancellation controller module is connected to the echo cancellation element and the other echo cancellation element. The echo cancellation controller module retrieves the echo cancellation algorithm data from the echo cancellation element, and transfers the echo cancellation algorithm data to the other echo cancellation element when a telecommunications channel is transferred from a cell to another cell.

What is claimed is: 
     
       1. A system for transferring echo cancellation data comprising: an echo cancellation element having echo cancellation algorithm data;   another echo cancellation element; and   a controller coupled to the echo cancellation element and the other echo cancellation element, the controller operable to retrieve the echo cancellation algorithm data from the echo cancellation element and to transfer the echo cancellation algorithm data to the other echo cancellation element when a telecommunications channel is transferred from a cell to another cell.   
     
     
       2. The system of claim 1 wherein the echo cancellation element and the other echo cancellation element are digital signal processor circuits. 
     
     
       3. The system of claim 1 wherein the echo cancellation element and the other echo cancellation element are each resident on a single circuit card. 
     
     
       4. The system of claim 1 wherein the echo cancellation element is resident on a circuit card, the other echo cancellation element is resident on another circuit card, and the controller is operable to transfer the echo cancellation algorithm data from the circuit card to the other circuit card. 
     
     
       5. The system of claim 1 wherein the controller further comprises: a switching module coupled to each echo cancellation element; and   a call processor coupled to the switching module, where the call processor is operable to receive data from a cell system and another cell system that indicates that a caller is moving from the cell system to the other cell system, to transmit a command to the echo cancellation element through the switching module requesting the echo cancellation data, to receive the echo cancellation data from the echo cancellation element through the switching module, and to transmit the echo cancellation data to the other echo cancellation element through the switching module.   
     
     
       6. The system of claim 1 wherein the controller further comprises: a signal processing circuit card, where the echo cancellation element is resident on the signal processing circuit card;   another signal processing circuit card, where the other echo cancellation element is resident on the other signal processing circuit card;   a switching module coupled to the signal processing circuit card and the other signal processing circuit card; and   a call processor coupled to the switching module, where the call processor is operable to receive data from a cell system and another cell system that indicates that a caller is moving from the cell system to the other cell system, to transmit a command to the signal processing circuit card through the switching module requesting the echo cancellation data, to receive the echo cancellation data from the signal processing circuit card through the switching module, and to transmit the echo cancellation data to the other signal processing circuit card through the switching module.   
     
     
       7. The system of claim 1 further comprising: an interface module coupled to the controller and a control data network;   another controller having another interface module, the other interface module coupled to the other controller, the other echo cancellation element, and the control data network; and   wherein the controller is coupled to the other echo cancellation element through the control data network and the other controller, and the controller is operable to receive the echo cancellation data from the echo cancellation element and to transmit the echo cancellation data to the other controller.   
     
     
       8. The system of claim 7 wherein the echo cancellation element and the other echo cancellation element are digital signal processor circuits. 
     
     
       9. The system of claim 7 wherein the control data network is an SS7 signaling network. 
     
     
       10. A method for transferring echo cancellation data comprising: receiving telecommunications channel data that can be used to identify a telecommunications channel, a cell, and another cell;   obtaining echo cancellation data from an echo cancellation element associated with the cell; and   transferring the echo cancellation data to another echo cancellation element associated with the other cell.   
     
     
       11. The method of claim 10 wherein receiving telecommunications channel data that identifies a telecommunications channel, a cell, and another cell comprises: receiving data that identifies the cell where a subscriber is presently operating;   receiving data that identifies the other cell where the subscriber will be operating within a predetermined period of time; and   compiling the request for echo cancellation data in response to the data.   
     
     
       12. The method of claim 10 further comprising transmitting a request for echo cancellation data to the echo cancellation element associated with the cell. 
     
     
       13. The method of claim 10 further comprising transmitting a request to a circuit card having one or more digital signal processor circuit(s). 
     
     
       14. The method of claim 10 wherein receiving the echo cancellation data from the echo cancellation element comprises receiving echo cancellation algorithm variable data for an established telecommunications channel from the echo cancellation element. 
     
     
       15. The method of claim 10 wherein receiving the echo cancellation data from the echo cancellation element comprises receiving transversal filter coefficients for an established telecommunications channel from the echo cancellation element. 
     
     
       16. The method of claim 10 wherein transmitting the echo cancellation data to another echo cancellation element associated with the other cell comprises transmitting the echo cancellation data to a signal processing circuit card. 
     
     
       17. The method of claim 10 wherein transmitting the echo cancellation data to another echo cancellation element associated with the other cell comprises transmitting the echo cancellation data to a signal processing circuit card that further comprises one or more digital signal processing circuits. 
     
     
       18. The method of claim 10 wherein transmitting a request for echo cancellation data to an echo cancellation element associated with the cell comprises: transmitting the request for echo cancellation data to a switching module; and   transmitting the request for echo cancellation data from the switching module to the echo cancellation element.   
     
     
       19. The method of claim 10 wherein transmitting the echo cancellation data to another echo cancellation element associated with the other cell comprises: transmitting the echo cancellation data to a switching module; and   transmitting the echo cancellation data from the switching module to the other echo cancellation element.   
     
     
       20. A method for transferring echo cancellation data comprising: receiving data that identifies a data channel, a cell, and another cell;   transmitting an echo cancellation data transfer command to an echo cancellation element associated with the cell; and   transmitting the echo cancellation data to another echo cancellation element associated with the other cell.   
     
     
       21. The method of claim 20 wherein the echo cancellation element and the other echo cancellation element are located on a single echo cancellation element card. 
     
     
       22. The method of claim 20 wherein the echo cancellation element is located on an echo cancellation element card and the other echo cancellation element is located on another echo cancellation element card. 
     
     
       23. The method of claim 20 wherein the echo cancellation element is located on an echo cancellation element card associated with a wireless telecommunications system and the other echo cancellation element is located on another echo cancellation element card associated with another wireless telecommunications system.