Spread-spectrum changeable base station

• US 6,356,534 B2
• Filed: 06/11/2001
• Issued: 03/12/2002
• Est. Priority Date: 06/29/1994
• Status: Expired due to Term

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Schilling, Donald L.
• Primary Examiner(s): CANGIALOSI, SALVATORE A
• Application Number:
  US09/878,647
• Publication Number:
  US 20010030947A1
• Time in Patent Office: 274 Days
• Field of Search: 370/260, 370/261, 370/267, 370/277, 370/278, 370/342, 370/474, 375/130, 375/134, 375/149
• US Class Current: 370/261
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/7093 Matched filter type
• 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 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 84/20 Master-slave selection or change arrangements
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A selected unit of a plurality of units receives data for others of the plurality of units over a first frequency. The selected unit mixes the received data from the other units with data of the selected unit. The selected unit transmits the mixed data over a second frequency. The other units receive the mixed data over the second frequency from the selected unit. Each of the other units transmits its data over the first frequency. One of the other units transmits a command and the one unit operates as the selected unit.

Claims

1. A method for conference calling in a wireless spread spectrum communication system having a plurality of units, the method comprising:

a selected unit of the plurality of units receiving data for others of the plurality of units over a first frequency;

the selected unit mixing the received data from the other units with data of the selected unit and transmitting the mixed data over a second frequency;

the other units receiving the mixed data over the second frequency from the selected unit;

each of the other units transmitting its data over the first frequency; and

transmitting a command from one of the other units;

wherein the one unit operates as the selected unit.

2. The method of claim 1 further comprising the selected unit receives the command and operates as the other units.

3. The method of claim 1 further comprising an operator of the one unit using a switch to initiate the command transmitting.

4. A system for use in a wireless spread spectrum communication system having a plurality of units, the system comprising:

the plurality of units, each unit comprising;

a base subunit for receiving data from others of the plurality of units over a first frequency, mixing the received data from the other units with data of that unit and transmitting the mixed data over a second frequency;

a remote subunit for receiving the mixed data over the second frequency and transmitting data of that unit over the first frequency; and

a control subunit for selectively activating the base and remote subunits.

5. The system of claim 4 wherein the control subunit upon receiving a command, activates the remote subunit and deactivates the base subunit.

6. The system of claim 4 wherein the control subunit in response to a switch, activates the base subunit, deactivates the remote subunit and transmits a command.

7. A unit for use in a wireless spread spectrum communication system having a plurality of other units, the unit comprising:

a base subunit for receiving data from others of the plurality of units over a first frequency, mixing the received data from the other units with data of that unit and transmitting the mixed data over a second frequency; and

a remote subunit for receiving the mixed data over the second frequency and transmitting data of that unit over the first frequency; and

a control subunit for selectively activating the base and remote subunits.

8. The unit of claim 7 wherein the control subunit upon receiving a command, activates the remote subunit and deactivates the base subunit.

9. The unit of claim 7 wherein the control subunit in response to a switch, activates the base subunit, deactivates the remote subunit and transmits a command.