Personal base station extension calling arrangement

• US 5,848,098 A
• Filed: 07/09/1996
• Issued: 12/08/1998
• Est. Priority Date: 07/09/1996
• Status: Expired due to Term

• Current Assignee: Avaya Incorporated
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Kroon, Peter, Chou, Shao-Ning, Cheng, James Y.
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Maddox, Michael W.
• Application Number:
  US08/679,404
• Time in Patent Office: 882 Days
• Field of Search: 375/220, 375/219, 375/221, 375/222, 455/73, 455/74, 455/74.1, 455/561, 455/560, 455/550, 455/555, 455/403, 455/414, 455/416, 455/417, 455/422, 455/426, 455/465, 455/462, 455/463, 455/464, 348/7, 348/12, 348/13, 340/825.51, 340/825.5
• US Class Current: 375/220
• CPC Class Codes: H04W 88/181 Transcoding devices; Rate adaptation devices

Abstract

A base station includes a digital signal processor, the base station operable to communicate with at least first and second wireless terminals using compressed digital signals modulated onto a radio frequency carrier, the base station further operable to communicate with an external network to facilitate a call between one or more wireless terminals and another party connected to the external network. The digital signal processor is operably connected to receive compressed signals from and provide compressed signals to the first and second wireless terminals, and further operably connected to communicate uncompressed signals with the external network. The digital signal processor is programmed to execute instructions to perform the following functions: monitor a first signal, the first signal received from the first wireless terminal; monitor a second signal, the second signal received from the second wireless terminal; monitor a network signal, the network signal received from the external network; select using predetermined criteria a priority signal, the priority signal comprising one of the first signal, the second signal and the network signal; and perform either a compression or decompression process on the priority signal and then provide the processed priority signal to at least one of the first wireless terminal, second wireless terminal and external network.

Claims

1. A digital signal processor for use in a base station, said base station operable to communicate with at least first and second wireless terminals using radio frequency signals, said base station further operable to communicate with an external network to facilitate a call between one or more wireless terminals and party connected to the external network, said digital signal processor operably connected to receive signals from and provide signals to the first and second wireless terminals and further operably connected to receive signals from and provide signals to the external network, said digital signal processor programmed to execute instructions to perform the following functions:

a) monitor a first signal, the first signal being in compressed digital signal format and received from the first wireless terminal;

b) monitor a second signal, the second signal being in compressed digital signal format and received from the second wireless terminal;

c) monitor a network signal, the network signal being in uncompressed digital signal format and received from the external network;

d) select using predetermined criteria a priority signal, said priority signal comprising one of the first signal, the second signal and the network signal; and

e) perform either a compression or decompression process on the priority signal and provide the processed priority signal to at least one of the first wireless terminal, second wireless terminal and external communication network.

2. The digital signal processor of claim 1 further programmed to execute instructions to select the priority signal based in part on whether an energy level of the network signal, an energy level of the first signal, and an energy level of the second signal exceeds a predetermined threshold.

3. The digital signal processor of claim 2 further programmed to execute instructions to select the priority signal to comprise the network signal based in part on whether the energy level of the network signal exceeds the predetermined threshold.

4. The digital signal processor of claim 2 further programmed to execute instructions to select the priority signal based in part on whether an energy level of an existing priority signal exceeds the predetermined threshold.

5. The digital signal processor of claim 1 further programmed to monitor the first signal and the second signal, wherein the first signal and the second signal are in a code-excited linear predictive ("CELP") encoded format.

6. The digital signal processor of claim 1 further programmed to execute instructions to perform a compression process utilizing a CELP encoding process, and perform a decompression process utilizing a CELP decoding process.

7. The digital signal processor of claim 1 further programmed to execute instructions to perform forward channel error code decoding on signals received from the first wireless terminal to produce the first signal therefrom, perform forward channel error code decoding on signals received from the second wireless terminal and produce the second signal therefrom, and forward channel error code encoding on the priority signal.

8. The digital signal processor of claim 1 further programmed to execute instructions to perform a decompression process on the priority signal if the priority signal comprises the first signal.

9. The digital signal processor of claim 1 further programmed to execute instructions to perform a compression process on the priority signal if the priority signal comprises the network signal.

10. A method of signal processing for use in a base station, said base station operable to communicate with at least first and second wireless terminals using radio frequency signals, said base station further operable to communicate with an external network to facilitate a call between one or more wireless terminals and another party connected to the external network, said method comprising:

a) receiving a first signal from the first wireless terminal, the first signal having an energy level;

b) receiving a second signal from the second wireless terminal, the second signal having an energy level;

c) receiving a network signal from the external network, the network signal having an energy level;

d) selecting a priority signal, said priority signal comprising one of the first signal, the second signal and the network signal, said selection based in part on the first signal energy level, the second signal energy level, and the network signal energy level; and

e) providing the priority signal to at least two of the first wireless terminal, second wireless terminal and external communication network, wherein said priority signal is provided to the external network in an uncompressed format and said priority signal is provided to the first and/or second wireless terminal in a compressed format.

11. The method of claim 10 wherein step d) further comprises selecting the priority signal based in part on whether the network signal energy level, the first signal energy level, or the second signal energy level exceeds a predetermined threshold.

12. The method of claim 11 wherein step d) further comprises selecting the priority signal to comprise the network signal based in part on whether the network signal energy level exceeds the predetermined threshold.

13. The method of claim 10 wherein step d) further comprises selecting the priority signal only if an existing priority signal energy level is equal to or less than a predetermined threshold.

14. The method of claim 10 wherein step e) further comprises providing the priority signal to the first and second wireless terminals if the priority signal comprises the network signal, and providing the priority signal to at least the external network if the priority signal comprises the first or second signal.

15. The method of claim 10 wherein the first signal comprises a vector-sum excited linear prediction ("VSELP") encoded signal and step a) further comprises obtaining the first signal energy level from at least one R0 coefficient from the first signal and wherein the second signal comprises a VSELP encoded signal and step b) further comprises obtaining the second signal energy level from at least one R0 coefficients from the second signal.

16. The method of claim 10 wherein the network signal comprises a sampled digital signal and step c) further comprises obtaining the network signal energy level by determining an average amplitude of the network signal.

17. The method of claim 10 wherein step d) further comprises first extracting data indicative of the first signal energy level from the first signal, extracting data indicative of the second signal energy level from the second signal, and extracting data indicative of the network signal energy level from the network signal, and then selecting the priority signal based in part on the extracted data.

18. The method of claim 17 wherein the first signal and the second signal are VSELP encoded signals and step d) further comprises extracting data indicative of the first signal energy level by obtaining a first energy level coefficient from the first signal and extracting data indicative of the second signal energy level by obtaining a second energy level coefficient from the second signal.

19. The method of claim 17 wherein step d) further comprises extracting the network signal energy level by obtaining the average amplitude of the network signal.

20. A base station operable to communicate with at least first and second wireless terminals using radio frequency signals, said base station further operable to communicate with an external network to facilitate a call between one or more wireless terminals and another party connected to the external network, the base station comprising:

a) a transmitter for transmitting radio frequency signals to said first and second wireless terminals;

b) a receiver for receiving radio frequency signals from said first and second wireless terminals;

c) a network interface for receiving signals from the external network and for providing signals to the external network;

d) a processor operably connected to the transmitter, the receiver and the network interface, said processor operable to;

monitor a first signal, the first signal associated with the first wireless terminal and being in compressed digital format;

monitor a second signal, the second signal associated with the second wireless terminal and being in compressed digital format;

monitor a network signal, the network signal associated with the external network and being in uncompressed digital format;

select using predetermined criteria a priority signal, said priority signal comprising one of the first signal, the second signal and the network signal; and

perform a compression or decompression process on the priority signal and provide the processed priority signal to at least one of the first wireless terminal, second wireless terminal and external network.

21. The base station of claim 20 wherein the processor is further operable to perform a CELP compression or decompression process on the priority signal.

22. The base station of claim 20 wherein the processor includes a digital signal processor that is further operable to perform forward channel error code decoding and pi/4 differential quadrature phase shift key demodulation.

23. The base station of claim 20 wherein the processor is further operable to select the priority signal based in part on whether an energy level of the network signal, an energy level of the first signal, or an energy level of the second signal exceeds a predetermined threshold.

24. The base station of claim 23 wherein the processor is further operable to select the priority signal to comprise the network signal based in part on whether the energy level of the network signal exceeds the predetermined threshold.

25. The base station of claim 23 wherein the processor is further operable to select the priority signal based in part on whether an energy level of an existing priority signal exceeds the predetermined threshold.

26. The base station of claim 20 wherein the processor is further operable to perform a decompression process on the priority signal if the priority signal comprises the first signal.

27. The base station of claim 20 wherein the processor is further operable to perform a compression process on the priority signal if the priority signal comprises the network signal.

28. The base station of claim 20 wherein the network interface further comprises:

a hybrid network connected to the external network;

a modem for performing call initiation functions; and

a switch for selectively and alternatively connecting the processor or the modem to the hybrid network.

29. A base station operable to communicate with at least first and second wireless terminals using radio frequency signals, said base station further operable to communicate with an external network to facilitate a call between one or more wireless terminals and another party connected to the external network, said base station comprising:

a) a transmitter for transmitting radio frequency signals to said first and second wireless terminals;

b) a receiver for receiving radio frequency signals from said first and second wireless terminals;

c) a network interface for receiving signals from the external network and providing signals to the external network;

d) a processor operably connected to the transmitter, the receiver, and the network interface, said processor operable to;

monitor a first signal, the first signal received from the first wireless terminal;

monitor a second signal, the second signal received from the second wireless terminal;

monitor a network signal, the network signal received from the external network;

select using predetermined criteria a priority signal, said priority signal comprising one of the first signal, the second signal and the network signal; and

perform a compression or decompression process on only the priority signal and provide the processed priority signal to at least one of the first wireless terminal, the second wireless terminal and the external network.