Wireless communication system

• US 5,398,258 A
• Filed: 10/26/1993
• Issued: 03/14/1995
• Est. Priority Date: 11/08/1991
• Status: Expired due to Term

• Current Assignee: Atmel Corporation (Microchip Technology Incorporated)
• Original Assignee: Teknekron Communications Systems Incorporated
• Inventors: Su, Chun-Meng, Chien, Edward, Messerschmitt, David G., Lu, Huihung, Jarett, Keith, Flores, Christopher, Behtash, Saman
• Primary Examiner(s): CANGIALOSI, SALVATORE A
• Application Number:
  US08/143,170
• Time in Patent Office: 504 Days
• Field of Search: 375/1, 455/34.2, 455/34.1, 455/38.1-38.3, 455/50.1, 455/51.1, 455/51.2, 455/163, 455/67-69, 370/11, 370/13, 370/17, 370/18, 370/50, 370/55, 370/95.1, 370/95.3, 370/100.1, 370/94.1, 370/24, 379/61, 379/63
• US Class Current: 375/277
• CPC Class Codes: H03M 13/31 combining coding for error detection or correction and efficient use of the spectrum without error detection or correction H03M5/14 , H03M5/145
• CPC Class Codes: H03M 5/145 Conversion to or from block codes or representations thereof
• CPC Class Codes: H04J 1/12 Arrangements for reducing cross-talk between channels in line transmission systems H04B3/32; in cables or lines H04B3/26 - H04B3/30
• CPC Class Codes: H04J 13/16 Code allocation
• CPC Class Codes: H04J 3/0605 Special codes used as synchronising signal
• CPC Class Codes: H04L 25/4908 using mBnB codes
• CPC Class Codes: H04M 1/72502 with one base station connected to a single line

Abstract

In the present invention a wireless communication system is disclosed. A base unit communicates with a remote unit. The system comprises means for transmitting, using CDMA, between the base unit and the remote unit, in one of a plurality of frequencies channels selected. In one period of time, the base unit transmits and in another period of time, different from the one period, the remote unit transmits. Further, the system comprises means for changing the one frequency channel selected to another frequency channel, different from the one frequency channel, in response to interference in the one frequency channel. Thus, communication between the base unit and the remote unit is then affected over the another frequency channel.

Claims

1. A full duplex wireless communication system for communicating between a base unit and a remote unit over a common frequency channel said system comprising:

said base unit comprising;

means for transmitting over said common frequency channel using CDMA in one period of time to the remote unit a sync signal, a first control signal, and a first data signal;

means for receiving over said common frequency channel using CDMA in another period of time, different from the one period, from the remote unit, a second control signal and a second data signal;

said remote unit comprising;

means for receiving over said common frequency channel using CDMA in the one period of time from the base unit the sync signal, the first control signal, and the first data signal; and

means for transmitting over said common frequency channel using CDMA in the another period of time to the base unit, the second control signal and the second data signal.

2. The system of claim 1 wherein said base unit communicates with a plurality of like remote units.

3. The system of claim 2 wherein said first control signal is received by the plurality of like remote units.

4. The system of claim 3 wherein said first data signal is CDMA encoded and is received by one of said plurality of remote units.

5. The system of claim 1 wherein said remote unit can be in one of three possible states:

OFF, STANDBY and ON.

6. The system of claim 5 wherein said remote unit when in the STANDBY state transmits only said second control signal and receives only said sync signal and first control signal.

7. A base unit for communicating wirelessly in full duplex with a remote unit over a common frequency channel, said base unit comprising:

means for transmitting over said common frequency channel using CDMA in one period of time to the remote unit a sync signal, a first control signal, and a first data signal; and

means for receiving over said common frequency channel using CDMA in another period of time, different from the one period, from the remote unit, a second control signal and a second data signal.

8. The system of claim 7 wherein said base unit communicates with a plurality of like remote units.

9. The system of claim 7 wherein said first data signal is CDMA encoded.

10. A remote unit for communicating wirelessly in full duplex with a base unit over a common frequency channel, said remote unit comprising:

means for receiving over said common frequency channel using CDMA in one period of time from the base unit a sync signal, a first control signal, and a first data signal; and

means for transmitting over said common frequency channel using CDMA in another period of time, different from the one period, to the base unit, a second control signal and a second data signal.

11. The system of claim 10 wherein said remote unit can be in one of three possible states:

OFF, STANDBY and ON.

12. The system of claim 11 wherein said remote unit when in the STANDBY state transmits only said second control signal and receives only said sync signal and first control signal.