Short range booster

• US 8,452,231 B2
• Filed: 02/02/2007
• Issued: 05/28/2013
• Est. Priority Date: 02/03/2006
• Status: Active Grant

• Current Assignee: Nextivity Incorporated
• Original Assignee: Nextivity Incorporated
• Inventors: Mohebbi, Behzad
• Primary Examiner(s): Maung, Nay A
• Assistant Examiner(s): TRANDAI, CINDY HUYEN
• Application Number:
  US12/279,814
• Publication Number:
  US 20090239521A1
• Time in Patent Office: 2,307 Days
• Field of Search: 455/11.1, 455/7, 455/422.1, 455/423, 455/67.11, 455/41.2, 455/422, 455/450, 455/452.2, 455/435.1, 455/411, 370/332, 370/253, 370/338, 370/350, 370328-329, 370335-336
• US Class Current: 455/11.1
• CPC Class Codes: H04B 7/15557 Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode

Abstract

A repeater mediates traffic between a network transceiver and a user transceiver in a wireless communication system. The repeater comprises a network unit that maintains a network link with the network transceiver, a user unit that maintains a user link with the user transceiver, a two-way communication pathway between the network unit and the user unit adapted to communicate signals between the network transceiver and the user transceiver in autonomous repeater hops between the network transceiver and the network unit, between the user transceiver and the user unit, and between the network unit and the user unit including downlink transmission from the network unit to the user unit and uplink transmission from the user unit to the network unit, and a detection unit coupled to the network unit and the user unit adapted to detect frame timing of downlink and uplink transmissions respectively by detecting a preamble sequence of downlink and/or uplink transmissions.

Claims

1. A repeater system that mediates traffic between a network transceiver and a user transceiver in a wireless communication system, the repeater system comprising:

a network unit that maintains a network link with the network transceiver;

a user unit that is physically separated by a distance from the network unit and that maintains a user link with the user transceiver;

a two-way wireless communication pathway in the distance between the network unit and the user unit adapted to communicate signals between the network transceiver and the user transceiver in autonomous repeater hops between the network transceiver and the network unit, between the user transceiver and the user unit, and in the two-way communication pathway between the network unit and the user unit including downlink transmission from the network unit to the user unit and uplink transmission from the user unit to the network unit; and

wherein both the network unit and the user unit have a detection unit, the detection unit of the network unit being adapted to detect frame timing of downlink transmissions by detecting a preamble sequence of downlink transmissions, and the detection unit of the user unit being adapted to detect frame timing of uplink transmissions by detecting a preamble sequence of uplink transmissions; and

wherein the detection unit of the network unit is adapted to detect start of frame timing of a downlink asymmetric Time Division Duplex (TDD) transmission and pass the frame timing to the user unit while the frame is being delayed; and

the network unit being adapted to detect a change in transmission pattern and send information to the user unit whereby both the network unit and the user unit switch to receive mode for detecting a preamble of an incoming frame.

2. The repeater according to claim 1 further comprising:

the detection unit configured to enable the network unit and the user unit to detect start of downlink by the network unit and/or detect start of uplink by the user unit in a beacon channel.

3. The repeater according to claim 1 further comprising:

the detection unit configured to enable the network unit and the user unit to detect start of downlink by the network unit and/or detect start of uplink by the user unit in a pilot channel.

4. The repeater according to claim 1 further comprising:

the detection unit configured to enable the network unit and the user unit to detect start of downlink by the network unit and/or detect start of uplink by the user unit in a broadcast channel.

5. The repeater according to claim 1 further comprising:

the detection unit configured to enable the network unit and the user unit to detect start of downlink by the network unit and/or detect start of uplink by the user unit in a traffic channel.

6. The repeater according to claim 1 further comprising:

the detection unit configured to detect in time and/or frequency the preamble.

7. The repeater according to claim 1 further comprising:

the detection unit adapted to detect frame timing of downlink and uplink Time Division Duplex (TDD) transmissions respectively by detecting a preamble sequence of the downlink and/or uplink transmissions.

8. The repeater according to claim 1 further comprising:

the detection unit adapted to detect a start of frame timing of a downlink symmetric Time Division Duplex (TDD) transmission and pass the start of frame timing to the user unit; and

the user unit adapted to control timing of the uplink TDD transmission according to the start of frame timing.

9. The repeater according to claim 1 further comprising:

the detection unit adapted to detect frame timing of a downlink symmetric Time Division

Duplex (TDD) transmission and pass the frame timing to the user unit; and

the two-way communication pathway configured to transmit a calibration signal in one of the forward link or reverse link at one time that results in a sounding signal, and respond by passing the calibration signal in an opposite link in a next frame transmission.

10. The repeater according to claim 1 further comprising:

the detection unit adapted to detect end of frame timing detected as a received signal level change.