Method and apparatus for performing a multi-party communication in a communication system

• US 6,078,809 A
• Filed: 02/27/1998
• Issued: 06/20/2000
• Est. Priority Date: 02/27/1998
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Proctor, Lee Michael
• Primary Examiner(s): Tsang, Fan
• Assistant Examiner(s): SOBUTKA, PHILIP
• Application Number:
  US09/031,987
• Time in Patent Office: 844 Days
• Field of Search: 455/416, 455/417, 455/422, 455/445, 455/560, 455/561, 455/524, 379/202, 379/206, 379/205, 370/260, 370/261, 370/262, 370/263, 370/264, 370/265, 370/266, 370/267, 370/268, 370/289
• US Class Current: 455/416
• CPC Class Codes: H04M 2203/5018 Initiating a conference during a two-party conversation, i.e. three-party-service or three-way-call computer conference organisation arrangements H04L12/1818
• CPC Class Codes: H04M 2207/18 wireless networks
• CPC Class Codes: H04M 3/56 Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities video conference systems H04N7/15
• CPC Class Codes: H04W 88/181 Transcoding devices; Rate adaptation devices

Abstract

The present invention provides a method and apparatus for performing a multi-party communication in a communication system (100). The communication system (100) includes a first base unit (203) in communication with a first mobile unit (201) and a second base unit (204) in communication with a second mobile unit (202). The first base unit (203) and the second base unit (204) each include a decoder (213, 214), an encoder (223, 274) and a logic unit (233, 224). A communication is initiated between the first mobile unit (201) and the second mobile unit (202). The decoder (213) and the encoder 223 are bypassed in the first base unit (203) by the speech packets. A need is determined to include a third communication unit (239) in the communication. The third communication unit (239) is added to the communication, and the first mobile unit (201) and the second mobile unit (202) continue to transfer speech packets therebetween by bypassing the decoder (213) and the encoder (223) in the first base unit (203).

Claims

1. A method for performing a multi-party communication in a communication system, the communication system including a first base unit in communication with a first mobile unit and a second base unit in communication with a second mobile unit, the first base unit and the second base unit including a decoder, an encoder and a logic unit, the method comprising:

initiating a communication between the first mobile unit and the second mobile unit;

bypassing the decoder and the encoder in the first base unit by speech packets sent between the first mobile unit and the second mobile unit;

determining a need to include a third communication unit in the communication; and

adding the third communication unit to the communication, wherein the speech packets sent between the first mobile unit and the second mobile unit continue to bypass the decoder and the encoder in the first base unit.

2. A method for performing a multi-party communication in a communication system in accordance with claim 1, wherein the third communication unit generates a signal, and wherein the second mobile unit generates a signal, the method further comprising the steps of:

decoding the signal from the third communication unit at a first decoder in the first mobile unit; and

decoding the signal from the second mobile unit at a second decoder in the first mobile unit.

3. A method for performing a multi-party communication in a communication system in accordance with claim 2, wherein the first decoder produces a first decoded output, and wherein the second decoder produces a second decoded output, the method further comprising the step of combining the first decoded output and the second decoded output in the first mobile unit.

4. A method for performing a multi-party communication in a communication system in accordance with claim 1, further comprising the steps of:

decoding a signal from the third communication unit at a first decoder in the second mobile unit; and

decoding a signal from the first mobile unit at a second decoder in the second mobile unit.

5. A method for performing a multi-party communication in a communication system in accordance with claim 4, wherein the first decoder produces a first decoded output, and wherein the second decoder produces a second decoded output, the method further comprising the step of combining the first decoded output and the second decoded output in the second mobile unit.

6. A method for performing a multi-party communication in a communication system in accordance with claim 1, wherein the third communication unit is added to the communication on a supplemental air interface channel.

7. A method for performing a multi-party communication in a communication system in accordance with claim 1, wherein the third communication unit is a third mobile unit in communication with a third base unit, the method further comprising the steps of:

decoding a signal from the first mobile unit at a first decoder in the third communication unit; and

decoding a signal from the second mobile unit at a second decoder in the third communication unit.

8. A method for performing a multi-party communication in a communication system in accordance with claim 7, wherein the first decoder produces a first decoded output, and wherein the second decoder produces a second decoded output, the method further comprising the step of combining the first decoded output and the second decoded output in the third mobile unit.

9. A method for performing a multi-party communication in a communication system in accordance with claim 1, the method further comprising the steps of:

receiving a speech packet from the second mobile unit at the first base unit; and

determining a need to dekey the transmitter of the first base unit based at least in part upon the speech packet.

10. A method for performing a multi-party communication in a communication system in accordance with claim 9, wherein the step of determining a need to dekey the transmitter comprises determining if the speech packet includes less than a predetermined number of bits.

11. A method for performing a multi-party communication in a communication system in accordance with claim 9, wherein the step of determining a need to dekey the transmitter comprises the steps of:

determining an encoding rate of the speech packet; and

comparing the encoding rate to a pre-determined rate.

12. A method for performing a multi-party communication in a communication system in accordance with claim 1, wherein the third communication unit is a fixed communication unit coupled to a Public Switched Telephone Network, the method further comprising the steps of:

decoding a first signal from the first mobile unit at a first decoder in the first base unit to produce a first decoded output;

decoding a second signal from the second base unit at a first decoder in the second base unit to produce a second decoded output;

combining the first decoded output and the second decoded output to produce a combined output; and

transmitting the combined output to the fixed communication unit.

13. A method for performing a multi-party communication in a communication system in accordance with claim 12, wherein the third communication unit produces a speech signal, the method further comprising the steps of:

encoding the speech signal at a first speech encoder in the first base unit; and

encoding the speech signal at a first speech encoder in the second base unit.

14. A method for performing a multi-party communication in a communication system, the communication system including a first base unit in communication with a first mobile unit and a fixed communication unit, the first base unit including a decoder, an encoder and a logic unit, and the fixed communication unit being connected to a Public Switched Telephone Network, the method comprising the steps of:

initiating a communication between the first mobile unit and the fixed communication unit;

decoding speech packets from the first mobile unit by the decoder;

encoding an unencoded speech communication signal from the fixed communication unit by the encoder;

determining a need to include a second mobile unit in the communication, the second mobile unit being in communication with a second base unit; and

adding the second mobile unit to the communication, wherein the first mobile unit and the second mobile unit transfer speech packets therebetween by bypassing the decoder and the encoder in the first base unit.

15. A method for performing a multi-party communication in a communication system in accordance with claim 14, wherein the fixed communication unit produces a signal, the method further comprising the steps of:

encoding the signal from the fixed communication unit at an encoder in the first base unit to produce a first encoded signal;

decoding the first encoded signal from the first base unit at a first decoder in the first mobile unit to produce a first output; and

decoding the signal from the second mobile unit at a second decoder in the first mobile unit to produce a second output.

16. A method for performing a multi-party communication in a communication system in accordance with claim 15, the method further comprising the step of combining the first output and the second output in the first mobile unit.

17. A method for performing a multi-party communication in a communication system in accordance with claim 14, wherein the fixed communication unit produces a signal, the method further comprising the steps of:

encoding the signal from the fixed communication unit at an encoder in the second base unit to produce a first encoded signal;

decoding the first encoded signal from the second base unit at a first decoder in the second mobile unit to produce a first output; and

decoding the signal from the first mobile unit at a second decoder in the second mobile unit to produce a second output.

18. A method for performing a multi-party communication in a communication system in accordance with claim 17, the method further comprising the step of combining the first output and the second output in the second mobile unit.

19. A method for performing a multi-party communication in a communication system in accordance with claim 14, wherein the step of bypassing the encoder in the first base unit further comprises the steps of:

passing the speech packets from the second mobile unit through the logic unit, the speech packets being passed at a data rate; and

determining a need to dekey the transmitter of the first base unit based on the data rate of the speech packets.

20. A method for performing a multi-party communication in a communication system in accordance with claim 14, the method further comprising the steps of:

decoding a signal from the first mobile unit at the decoder in the first base unit to generate a first decoded output;

decoding a signal from the second mobile unit at a decoder in the second base unit to generate a second decoded output;

combining the first decoded output and the second decoded output to form a combined output; and

transmitting the combined output to the fixed communication unit.

21. An apparatus comprising:

a decoder having an encoded uplink communication signal transmitted from a remote unit as an input and an output comprising a decoded uplink communication signal;

circuitry for receiving the encoded uplink communication signal and outputting the encoded uplink communication signal;

an encoder for receiving an unencoded downlink communication signal and outputting a first encoded downlink communication signal; and

a logic unit for receiving a second encoded downlink communication signal and outputting the second encoded downlink communication signal.

22. An apparatus in accordance with claim 21, wherein the logic unit performs discontinuous transmission of the second encoded downlink communication signal.

23. An apparatus in accordance with claim 22, further comprising a transmitter.

24. An apparatus in accordance with claim 23, further comprising circuitry for selectively dekeying the transmitter.

25. An apparatus in accordance with claim 21, further comprising a three party conference circuit for connection to a Public Switched Telephone Network and including a combiner for receiving the decoded uplink communication signal for use by a fixed communication unit and a broadcast channel for outputting the unencoded downlink communication signal to the encoder.

26. An apparatus in accordance with claim 21, wherein the apparatus further comprises a transmitter, and wherein the logic unit receives a speech packet from a mobile unit and determines a need to dekey the transmitter if the speech packet includes less than a predetermined number of bits.

27. A communication system comprising:

a first base unit comprising;

a decoder having an encoded uplink communication signal transmitted from a remote unit as an input and an output comprising a decoded uplink communication signal;

circuitry for receiving the encoded uplink communication signal and outputting the encoded uplink communication signal;

an encoder for receiving an unencoded downlink communication signal and outputting a first encoded downlink communication signal; and

a logic unit for receiving a second encoded downlink communication signal and outputting the second encoded downlink communication signal;

a second base unit comprising;

a second decoder having a second encoded uplink communication signal transmitted from a second remote unit as an input and an output comprising a second decoded uplink communication signal;

circuitry for receiving the second encoded uplink communication signal and outputting the second encoded uplink communication signal;

an encoder for receiving an unencoded downlink communication signal and outputting a second encoded downlink communication signal; and

a logic unit for receiving the encoded uplink communication signal and outputting the encoded downlink communication signal; and

a three party conference circuit for connection to a Public Switched Telephone Network and including a

combiner for receiving the decoded uplink communication signal for use by a wireline telephone and a broadcast channel for outputting the unencoded downlink communication signal.