Bus for a cellular telephone

• US 5,109,402 A
• Filed: 09/04/1990
• Issued: 04/28/1992
• Est. Priority Date: 09/13/1989
• Status: Expired due to Term

• Current Assignee: Novatel Incorporated (Hexagon AB)
• Original Assignee: Novatel Communications Ltd (Hexagon AB)
• Inventors: Anderson, Gregory D., Keashly, Dusty
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Shehata, M.
• Application Number:
  US07/579,289
• Time in Patent Office: 602 Days
• Field of Search: 379/59, 379/60, 379/62, 379/63, 379/165, 379/58
• US Class Current: 455/557
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

An apparatus for interconnecting a cellular telephone transceiver and a plurality of peripheral devices, such as handsets or speakerphones, is disclosed. The apparatus provides a bus-type interconnection in which multiple peripheral devices may connect with a single transceiver, and the flow of information from the peripheral devices to the transceiver is regulated in accordance with a protocol.

Claims

1. A cellular telephone system, said system comprising:

A. a cellular telephone transceiver;

B. one or more peripheral devices; and

C. system interconnection means for connecting the transceiver to each of the peripheral devices, the system interconnection means including;

i. audio signal interconnection means for passing an audio signal between the transceiver and the peripheral devices,

ii. information signal interconnection means for passing an information signal between the transceiver and the peripheral devices,

iii. control signal interconnection means for passing a control signal between the transceiver and the peripheral devices, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that a peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from a peripheral device.

2. The system of claim 1 wherein the second portion of the control signal comprises either the first predetermined logical state or a second predetermined logical state which exists for a second predetermined period of time following the expiration of the first predetermined period of time.

3. The system as in claim 2 wherein the control signal includes a third portion which comprises the first predetermined logical state which exists for a third predetermined period of time, following the expiration of the second predetermined period of time, during which information may be transmitted from a peripheral device to the transceiver.

4. A cellular telephone transceiver, said transceiver comprising:

A. audio signal interconnection means for passing audio signals between the transceiver and one or more peripheral devices;

B. information signal interconnection means for passing information signals between the transceiver and one or more peripheral devices; and

C. control signal interconnection means for receiving a control signal from or transmitting a control signal to one or more peripheral devices, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that a peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from a peripheral device.

5. The transceiver as in claim 4 wherein the second portion of the control signal comprises either the first predetermined logical state or a second predetermined logical state which exists for a second predetermined period of time following the expiration of the first predetermined period of time.

6. The transceiver as in claim 5 wherein the control signal includes a third portion which comprises the first predetermined logical state which exists for a third predetermined period of time, following the expiration of the second predetermined period of time, during which information may be transmitted from a peripheral device to the transceiver.

7. A peripheral device for use with a cellular telephone transceiver, said device comprising:

A. audio signal interconnection means for passing audio signals between the peripheral device and a cellular telephone transceiver;

B. information signal interconnection means for passing information signals between the peripheral device and the transceiver; and

C. control signal interconnection means for passing a control signal between the peripheral device and the transceiver, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that the peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from the peripheral device.

8. The peripheral device as in claim 7 wherein the second portion of the control signal comprises either the first predetermined logical state or a second predetermined logical state which exists for a second predetermined period of time following the expiration of the first predetermined period of time.

9. The peripheral device as in claim 8 wherein the control signal includes a third portion which comprises the first predetermined logical state which exists for a third predetermined period of time, following the expiration of the second predetermined period of time, during which information may be transmitted from the peripheral device to the transceiver.

10. The peripheral device as in claim 8 wherein the second predetermined logical state indicates that the transceiver is not ready to receive information from the peripheral device.