Dynamic digital up and down converters

• US 20060223468A1
• Filed: 03/31/2005
• Published: 10/05/2006
• Est. Priority Date: 03/31/2005
• Status: Active Grant

• Current Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: ADC Telecommunications Incorporated (TE Connectivity Limited)
• Inventors: Bauman, Donald R., Cannon, Jeffrey J., Brennan, Jeffrey O., Toms, Jerry Edward
• Granted Patent: US 7,474,891 B2
• Time in Patent Office: Days
• US Class Current: 455/190.100
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 80/00 Wireless network protocols or protocol adaptations to wireless operation
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

The present invention relates to dynamically configured wireless communication systems. In particular, in one embodiment, dynamically configured up and down converters in a communication system is provided. The method comprises receiving a request to change a protocol in a communication channel. Obtaining one or more parameters associated with the change in protocol of the communication channel and applying the parameters to the up and down converters.

Claims

1. A method of dynamically configuring up and down converters in a communication system, the method comprising:

receiving a request to change a protocol in a communication channel;

obtaining one or more parameters associated with the change in protocol of the communication channel; and

applying the one or more parameters to the up and down converters.

2. The method of claim 1, wherein the one or more parameters include at least one of filter coefficients, numerically controlled oscillator (NCO) frequency, interpolation/decimation rates and sampling rates.

3. The method of claim 1, wherein the request to change protocol is received in a page header from a call processing software module.

4. The method of claim 1, wherein the parameters is at least one of frequency, bandwidth and amplitude.

5. The method of claim 1, further comprising:

changing sampling rates of the up and down converters in response to the one or more parameters.

6. The method of claim 1, wherein obtaining the one or more parameters associated with the change in protocol of the communication channel further comprises:

reading the one or more parameters from a table stored in memory.

7. The method of claim 6, further comprising:

storing valid parameters associated with protocols in the memory.

8. The method of claim 1, further comprising:

delaying the changing of filter coefficients of at least one of the up and down converters.

9. The method of claim 8, further comprising:

storing the filter coefficients in a buffer during the delay.

10. The method of claim 8, wherein the delay is for a select amount of time.

11. The method of claim 8, wherein the delay ends upon the receipt of a trigger data sample.

12. A method of dynamically operating a communication system, the method comprising:

receiving a page header from a call processing software module that indicates the desire to frequency hop;

determining if the requested frequency hop is permitted;

when the frequency hop is permitted,

retrieving parameters associated with the frequency hop;

implementing the parameters in a digital up converter; and

processing a page of data associated with the page header through the digital up converter.

13. The method of claim 12, wherein the page header further includes at least one of a trigger data sample that designates when to hop and a designated time to hop.

14. The method of claim 12, wherein determining if the requested frequency hop is permitted further comprises at least one of determining if a desired RF channel to hop to is outside of the valid channels supported by an associated radio head unit, if the frequency hop is requested at an invalid time and if the modulation protocol is not supported.

15. The method of claim 12 wherein retrieving parameters associated with the frequency hop further comprises:

retrieving the parameters from a table in memory.

16. The method of claim 12, wherein the parameters includes at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates.

17. The method of claim 12, further comprising:

delaying the implementation of the parameters.

18. The method of claim 12, further comprising:

implementing the parameters in an associated digital down converter.

19. The method of claim 18, further comprising:

delaying the implementation of parameters in the associated down converter.

20. The method of claim 12, wherein determining if the requested frequency hop is permitted, further comprises:

looking for an error condition flag.

21. The method of claim 12, further comprising:

generating an error condition flag when at least one an RF channel requested to hop to is outside of the valid channels supported by an associated radio head unit, the frequency hop requested is at an invalid time and the modulation protocol is not supported.

22. A method of dynamically changing communication channels in one or more digital converters, the method comprising:

selectively changing at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates in the digital converter based at least in part on a message received in a page header of a page of data.

23. The method of claim 22, further comprising:

looking up the at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates in a table of allowed protocols.

24. The method of claim 22, further comprising:

loading the at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates in the digital converter based at least in part on messages received in a page header to change the protocol of a communication channel.

25. The method of claim 22, wherein the digital converter is a digital up converter, the method further comprising:

converting a complex digital baseband signal to a passband signal.

26. The method of claim 22, wherein the digital converter is a digital down converter, the method further comprising:

converting a passband signal to a complex digital baseband signal.

27. The method of claim 22, further comprising:

storing the at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates in a buffer for a select delay before loading the at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates into the digital converter.

28. The method of claim 27, wherein the delay is based upon at least one of a designated time and a trigger data sample.

29. A communication system, the communication system comprising:

a transmit engine adapted to transmit complex data samples;

a timing circuit adapted to control the timing of the complex data samples transmitted through the transmit engine; and

at least one digital up converter, each digital up converter adapted to dynamically change at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates based at least in part in information contained in a page header, the digital up converter further adapted to convert the complex data samples to passband signals.

30. The communication system of claim 29, further comprising:

a configuration manager adapted to load the appropriate filter coefficients and and transfer rates to the at least one digital up converter.

31. The communication system of claim 29, further comprising:

a memory adapted to store a table of parameters for different protocols, the configuration manager further adapted to look up the parameters in the table in determining the appropriate filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates.

32. The communication system of claim 29, wherein each digital up converter has a buffer, wherein the at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates are stored in the buffer until loaded in the at least one digital up converter.

33. The communication system of claim 29, further comprising:

at least one digital down converter, each digital down converter adapted to change the at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates based at least in part in information contained in the page header, the digital down converter further adapted to convert passband signals to complex digital data samples.

34. The communication system of claim 33, further comprising:

a configuration manager adapted to load the appropriate at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates in the at least one digital down converter; and

a memory adapted to store a table of parameters for different protocols, the configuration manager further adapted to look up the parameters in the table in determining the appropriate filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates.

35. The communication system of claim 33, further comprising:

wherein each digital down converter has a buffer, wherein the at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates are stored in the buffer until loaded in the at least one digital down converter.

36. A radio head interface card comprising:

one or more digital up converters, each digital up converter adapted to convert complex digital data samples to passband signals of a select protocol based upon at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates loaded in the digital up converter;

one or more digital down converters, each digital down converter adapted to convert the passband signals to the complex digital data samples of a select protocol based upon the at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates loaded in the digital down converter; and

a controller adapted to read protocol information in a page header associated with the complex data samples, the controller further adapted to load filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates in associated up and down converters based at least in part on the protocol information in the page header.

37. The radio head interface card of claim 36, further comprising:

a memory adapted to store a table containing parameters associated with the protocols.

38. The radio head interface card of claim 36, wherein the parameters are at least one of frequency, bandwidths and amplitudes.

39. The radio head interface card of claim 36, wherein each digital up converter and each digital down converter further comprises:

a buffer adapted to store filter coefficients and sampling rates for select period of time before they are load in their associated up and down converter.

40. A server in a communication system comprising:

one or more radio head interface cards, each radio head interface card adapted to communicate with a radio head unit, each radio head interface card including,

one or more digital up converters, each digital up converter adapted to convert complex digital data samples to passband signals of a select protocol based upon parameters loaded in the digital up converter;

one or more digital down converters, each digital down converter adapted to convert the passband signals to the complex data samples of a select protocol based upon parameters loaded in the digital down converter;

a controller adapted to read protocol information in a page header associated with the complex data samples, the controller further adapted to load the parameters in associated up and down converters based at least in part on the protocol information in the page header; and

an interface adapted to pass information traveling between the radio head interface card and a call processing module.

41. The server of claim 40, wherein the interface is at least one of a high speed serial and a high speed parallel interface.

42. The server of claim 40, wherein the parameters are at least one of filter coefficients, NCO frequency, interpolation/decimation rates and sampling rates.

43. A communication system comprising:

a means for converting complex digital data samples to passband signals in a communication channel; and

a means for changing the protocol used in the communication channel based on information received in a page header associated with the communication channel.

44. The communication system of claim 43, further comprising:

a means for converting passband signals into complex digital data samples to in the communication channel; and

a means for changing the protocol used in the communication channel based on a information received in the page header associated with the communication channel.

45. The communication system of claim 43, further comprising:

a means for delaying the change in protocol.

46. The communication system of claim 43, further comprising:

a means for looking up parameters associated with a protocol in a table.

47. The communication system of claim 46, further comprising:

a means for loading parameters in the table.