Signal relay apparatus, method, and computer readable medium adapted for wireless network

• US 7,853,228 B2
• Filed: 02/22/2007
• Issued: 12/14/2010
• Est. Priority Date: 11/06/2006
• Status: Active Grant

• Current Assignee: Institute For Information Industry
• Original Assignee: Institute For Information Industry
• Inventors: Hsieh, Chih-Chiang, Lee, Yung-Ting, Tsai, Yi-Hsueh
• Primary Examiner(s): Nguyen; Duc
• Assistant Examiner(s): Nguyen; Hai V
• Application Number:
  US11/677,937
• Publication Number:
  US 20080108317A1
• Time in Patent Office: 1,391 Days
• Field of Search: 455/232.1
• US Class Current: 455/232.1
• CPC Class Codes: H04B 7/0805 with single receiver and antenna switching H04B7/0822 takes precedence
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A signal relay apparatus, method, application program, and computer readable medium adapted for wireless network are capable of saving power consumption due to failure of adjusting amplifying gain dynamically and solving the difficulty of demodulation since noise is also amplified during relay. For wireless access network, the present invention decreases the transmission power of mobile devices so that the battery of the mobile devices may keep working longer and the interference inside is reduced.

Claims

1. A signal relay apparatus of a wireless network, comprising:

a receiver for receiving a wireless signal and converting the wireless signal into a digital signal, wherein the digital signal is identifiable to a physical layer of the wireless network;

a first converter for converting the digital signal into information, wherein the information is identifiable to a data link layer of the wireless network;

a controller for generating a control signal after retrieving content related to quality of the wireless signal from the information;

an adjuster for generating a gain adjustment signal according to the control signal;

an amplifier for adjusting a gain for amplifying a processed signal generated in response to the digital signal according to the gain adjustment signal; and

a transmitter for transmitting the processed signal.

2. The signal relay apparatus according to claim 1, further comprising:

a first switch for selecting a first transceiver and a second transceiver of the signal relay apparatus as one of the receiver and the transmitter via TDD (Time Division Duplex) according to the control signal.

3. The signal relay apparatus according to claim 1, further comprising:

a filter for filtering out noise of the digital signal to generate the processed signal.

4. The signal relay apparatus according to claim 1, wherein the receiver comprises:

a second converter for doing sample conversion, timing synchronization and timing equalization on the wireless signal to generate an initial digital signal; and

a third converter for doing FFT (Fast Fourier Transform) and de-modulation on the initial digital signal to generate the digital signal, wherein the de-modulation is done based on a modulation process, and the modulation process is one or a combination of 16-quadrature amplitude modulation, 64-quadrature amplitude modulation, 256-quadrature amplitude modulation, binary phase shift keying, and quadrature phase shift keying.

5. The signal relay apparatus according to claim 4, further comprising:

a first de-converter for converting the control signal into a report signal, wherein the report signal is identifiable to the physical layer; and

a second switch for selecting one of the digital signal and the report signal according to the control signal;

wherein the transmitter comprises a second de-converter for doing modulation based on the modulation process and IFFT (Inverse Fast Fouier Transform) on the selected signal to generate the processed signal.

6. The signal relay apparatus according to claim 1, wherein the receiver comprises:

a second converter for doing sample conversion, timing synchronization and timing equalization on the wireless signal to generate an initial digital signal;

a third converter for doing FFT and de-modulation on the initial digital signal to generate a de-modulated signal, wherein the de-modulation is done based on a modulation process, and the modulation process is one or a combination of 16-quadrature amplitude modulation, 64-quadrature amplitude modulation, 256-quadrature amplitude modulation, binary phase shift keying, and quadrature phase shift keying;

a de-interleaver for de-interleaving the de-modulated signal to generate a de-interleaved signal; and

a decoder for decoding the de-interleaved signal to generate the digital signal.

7. The signal relay apparatus according to claim 6, further comprising:

a first de-converter for converting the control signal into a report signal, wherein the report signal is identifiable to the physical layer; and

a second switch for selecting one of the digital signal and the report signal according to the control signal;

wherein the transmitter comprises a second de-converter for coding, interleaving, modulating based on the modulation process, and IFFT on the selected signal to generate the processed signal.

8. The signal relay apparatus according to claim 1, wherein the receiver comprises:

a second converter for doing sample conversion, timing synchronization and timing equalization on the wireless signal to generate an initial digital signal;

a third converter for doing FFT and de-modulation on the initial digital signal to generate a de-modulated signal, wherein the de-modulation is done based on a modulation process, and the modulation process is one or a combination of 16-quadrature amplitude modulation, 64-quadrature amplitude modulation, 256-quadrature amplitude modulation, binary phase shift keying, and quadrature phase shift keying;

a de-interleaves for de-interleaving the de-modulated signal to generate a de-interleaved signal;

a decoder for decoding the de-interleaved signal to generate a decoded signal; and

a de-randomizer for de-randomizing the decoded signal to generate the digital signal.

9. The signal relay apparatus according to claim 8, wherein the transmitter comprises:

a second de-converter for randomizing, coding, interleaving, modulating based on the modulation process, and IFFT on the control signal to generate the processed signal.

10. A method for relaying signals in a wireless network, comprising the following steps:

receiving a wireless signal and converting the wireless signal into a digital signal, wherein the digital signal is identifiable to a physical layer of the wireless network;

converting the digital signal into information, wherein the information is identifiable to a data link layer of the wireless network;

generating a control signal after retrieving content related to quality of the wireless signal from the information;

generating a gain adjustment signal according to the control signal;

adjusting a gain for amplifying a processed signal generated in response to the digital signal according to the gain adjustment signal; and

transmitting the processed signal.

11. The method according to claim 10, further comprising a step of filtering out noise of the digital signal to generate the processed signal.

12. The method according to claim 10, wherein the receiving step comprises following steps:

doing sample conversion, timing synchronization and timing equalization on the wireless signal to generate an initial digital signal; and

doing FFT(Fast Fourier Transform) and de-modulation on the initial digital signal to generate the digital signal, wherein the de-modulation is done based on a modulation process, and the modulation process is one or a combination of 16-quadrature amplitude modulation, 64-quadrature amplitude modulation, 256-quadrature amplitude modulation, binary phase shift keying, and quadrature phase shift keying.

13. The method according to claim 12, further comprising the following steps:

converting the control signal into a report signal, wherein the report signal is identifiable to the physical layer; and

selecting one of the digital signal and the report signal according to the control signal;

wherein the transmitting step comprises a step of doing modulation based on the modulation process and IFFT (Inverse Fast Fourier Transform) on the selected signal to generate the processed signal.

14. The method according to claim 10, wherein the receiving step comprises the following steps:

doing sample conversion, timing synchronization and timing equalization on the wireless signal to generate an initial digital signal;

doing FFT and de-modulation on the initial digital signal to generate a de-modulated signal, wherein the de-modulation is done based on a modulation process, and the modulation process is one or a combination of 16-quadrature amplitude modulation, 64-quadrature amplitude modulation, 256-quadrature amplitude modulation, binary phase shift keying, and quadrature phase shift keying;

de-interleaving the de-modulated signal to generate a de-interleaved signal; and

decoding the de-interleaved signal to generate the digital signal.

15. The method according to claim 14, further comprising the following steps:

converting the control signal into a report signal, wherein the report signal is identifiable to the physical layer; and

selecting one of the digital signal and the report signal according to the control signal;

wherein the transmitting step comprises a step of coding, interleaving, modulating based on the modulation process, and IFFT on the selected signal to generate the processed signal.

16. The method according to claim 10, wherein the receiving step comprises following steps:

doing sample conversion, timing synchronization and timing equalization on the wireless signal to generate an initial digital signal;

doing FFT and de-modulation on the initial digital signal to generate a de-modulated signal, wherein the de-modulation is done based on a modulation process, and the modulation process is one or a combination of 16-quadrature amplitude modulation, 64-quadrature amplitude modulation, 256-quadrature amplitude modulation, binary phase shift keying, and quadrature phase shift keying;

de-interleaving the de-modulated signal to generate a de-interleaved signal;

decoding the de-interleaved signal to generate a decoded signal; and

de-randomizing the decoded signal to generate the digital signal.

17. The method according to claim 16, wherein the transmitting step comprises a step of randomizing, coding, interleaving, modulating based on the modulation process, and IFFT on the control signal to generate the processed signal.

18. A computer readable medium storing a computer program to execute a method for relaying signals in a wireless network, the method comprising the following steps:

receiving a wireless signal and converting the wireless signal into a digital signal, wherein the digital signal is identifiable to a physical layer of the wireless network;

converting the digital signal into information, wherein the information is identifiable to a data link layer of the wireless network;

generating a control signal after retrieving content related to quality of the wireless signal from the information;

generating a gain adjustment signal according to the control signal;

adjusting a gain for amplifying a processed signal generated in response to the digital signal according to the gain adjustment signal; and

transmitting the processed signal.

19. The computer readable medium according to claim 18, wherein the method further comprises a step of filtering out noise of the digital signal to generate the processed signal.

20. The computer readable medium according to claim 18, wherein the receiving step comprises following steps:

doing sample conversion, timing synchronization and timing equalization on the wireless signal to generate an initial digital signal; and

doing FFT(Fast Fourier Transform) and de-modulation on the initial digital signal to generate the digital signal, wherein the de-modulation is done based on a modulation process, and the modulation process is one or a combination of 16-quadrature amplitude modulation, 64-quadrature amplitude modulation, 256-quadrature amplitude modulation, binary phase shift keying, and quadrature phase shift keying.

21. The computer readable medium according to claim 20, wherein the method further comprises the following steps:

converting the control signal into a report signal, wherein the report signal is identifiable to the physical layer; and

selecting one of the digital signal and the report signal according to the control signal;

wherein the transmitting step comprises a step of doing modulation based on the modulation process and IFFT (Inverse Fast Fourier Transform) on the selected signal to generate the processed signal.

22. The computer readable medium according to claim 18, wherein the receiving step comprises the following steps:

doing sample conversion, timing synchronization and timing equalization on the wireless signal to generate an initial digital signal;

doing FFT and de-modulation on the initial digital signal to generate a de-modulated signal, wherein the de-modulation is done based on a modulation process, and the modulation process is one or a combination of 16-quadrature amplitude modulation, 64-quadrature amplitude modulation, 256-quadrature amplitude modulation, binary phase shift keying, and quadrature phase shift keying;

de-interleaving the de-modulated signal to generate a de-interleaved signal; and

decoding the de-interleaved signal to generate the digital signal.

23. The computer readable medium according to claim 22, wherein the method further comprises the following steps:

converting the control signal into a report signal, wherein the report signal is identifiable to the physical layer; and

selecting one of the digital signal and the report signal according to the control signal;

wherein the transmitting step comprises a step of coding, interleaving, modulating based on the modulation process, and IFFT on the selected signal to generate the processed signal.

24. The computer readable medium according to claim 18, wherein the receiving step comprises following steps:

doing sample conversion, timing synchronization and timing equalization on the wireless signal to generate an initial digital signal;

doing FFT and de-modulation on the initial digital signal to generate a de-modulated signal, wherein the de-modulation is done based on a modulation process, and the modulation process is one or a combination of 16-quadrature amplitude modulation, 64-quadrature amplitude modulation, 256-quadrature amplitude modulation, binary phase shift keying, and quadrature phase shift keying;

de-interleaving the de-modulated signal to generate a de-interleaved signal;

decoding the de-interleaved signal to generate a decoded signal; and

de-randomizing the decoded signal to generate the digital signal.

25. The computer readable medium according to claim 24, wherein the transmitting step comprises a step of randomizing, coding, interleaving, modulating based on the modulation process, and IFFT on the control signal to generate the processed signal.