Data transmission method and apparatus

• US 10,419,111 B2
• Filed: 03/16/2018
• Issued: 09/17/2019
• Est. Priority Date: 09/18/2015
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Zhang, Xiaofeng, Zhou, Lei
• Primary Examiner(s): Torres, Juan A
• Application Number:
  US15/923,020
• Publication Number:
  US 20180205456A1
• Time in Patent Office: 550 Days
• Field of Search: 398 26
• CPC Class Codes: H04B 10/07953 Monitoring or measuring OSNR, BER or Q
• CPC Class Codes: H04B 10/2575 Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• CPC Class Codes: H04B 10/516 Details of coding or modulation
• CPC Class Codes: H04J 13/18 Allocation of orthogonal codes
• CPC Class Codes: H04J 14/005 Optical Code Multiplex
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The present disclosure provides example data transmission methods and apparatuses. One example method includes obtaining a radio signal by using an input port. Based on a correspondence between an input port and a bearer channel, a bearer channel corresponding to the radio signal is determined. Code Division Multiple Access (CDMA) modulation and carrier modulation on the radio signal are performed according to a codeword and a frequency sub-band corresponding to the bearer channel, to obtain a modulated electrical signal. The modulated electrical signal is then modulated to an optical wavelength corresponding to the bearer channel to obtain a modulated optical signal, and the modulated optical signal is sent to an optical network.

Claims

1. A data transmission method, comprising:

determining at least one bearer channel according to a configured type of a radio signal, a configured quantity of each type of radio signals, and a configured channel capacity requirement of each type of radio signals;

establishing a correspondence between an input port and a bearer channel;

obtaining a radio signal by an input port;

determining, based on the correspondence between an input port and a bearer channel, a bearer channel corresponding to the radio signal;

performing Code Division Multiple Access (CDMA) modulation and carrier modulation on the radio signal according to a codeword and a frequency sub-band corresponding to the bearer channel to obtain a modulated electrical signal;

modulating the modulated electrical signal to an optical wavelength corresponding to the bearer channel to obtain a modulated optical signal; and

sending the modulated optical signal to an optical network.

2. The method according to claim 1, wherein the method further comprises:

measuring a channel to obtain information indicating how a signal-to-noise ratio (SNR) changes with a frequency spectrum;

determining at least one bearer channel according to the information indicating how the SNR changes with the frequency spectrum; and

establishing the correspondence between an input port and a bearer channel.

3. The method according to claim 1, wherein the method further comprises:

sending the correspondence to a receive end by a management channel, wherein the receive end demodulates the modulated optical signal according to the correspondence, wherein a codeword and a carrier used for the management channel are fixed.

4. The method according to claim 1, wherein the method further comprises:

receiving the correspondence by a management channel, wherein a codeword and a carrier used for the management channel are fixed.

5. The method according to claim 2, wherein measuring the channel comprises:

sending a reference signal;

receiving, using a management channel, a measurement result generated based on the reference signal, wherein a codeword and a carrier used for the management channel are fixed; and

determining, according to the measurement result, the information indicating how the SNR changes with the frequency spectrum.

6. A network side device, comprising:

an input port, the input port configured to receive a radio signal;

at least one processor, the at least one processor configured to determine, based on a correspondence between an input port and a bearer channel, a bearer channel corresponding to the radio signal, wherein the bearer channel is associated with a codeword, a frequency sub-band, and an optical wavelength;

a modem, the modem configured to;

perform Code Division Multiple Access (CDMA) modulation and carrier modulation on the radio signal according to the codeword and the frequency sub-band corresponding to the bearer channel to obtain a modulated electrical signal, wherein the CDMA modulation is performed according to the codeword associated with the bearer channel, and wherein the carrier modulation is performed according to the frequency sub-band associated with the bearer channel; and

modulate the modulated electrical signal to the optical wavelength associated with the bearer channel to obtain a modulated optical signal, wherein the optical wavelength is an optical wavelength supported by an optical network that connects the network side device and a receive end device; and

an optical transceiver, the optical transceiver configured to send the modulated optical signal to the optical network.

7. The network side device according to claim 6, wherein the at least one processor is further configured to:

obtain a measurement result of a channel, wherein the measurement result comprises information indicating how a signal-to-noise ratio (SNR) changes with a frequency spectrum;

determine at least one bearer channel according to the information indicating how the SNR changes with the frequency spectrum; and

establish the correspondence between an input port and a bearer channel.

8. The network side device according to claim 6, wherein the at least one processor is further configured to:

determine at least one bearer channel according to a configured type of a radio signal, a configured quantity of each type of radio signals, and a configured channel capacity requirement of each type of radio signals; and

establish the correspondence between an input port and a bearer channel.

9. The network side device according to claim 6, wherein the optical transceiver is further configured to send the correspondence to the receive end device by a management channel, wherein the receive end device demodulates the modulated optical signal according to the correspondence, and wherein a codeword and a carrier used for the management channel are fixed.

10. The network side device according to claim 6, wherein the optical transceiver is further configured to receive the correspondence by a management channel, wherein a codeword and a carrier used for the management channel are fixed.

11. The network side device according to claim 6, wherein:

the network side device is a baseband unit (BBU) side device, and the receive end device is a remote radio unit (RRU) side device;

or

the network side device is a RRU side device, and the receive end device is a BBU side device.

12. The network side device according to claim 7, wherein:

the optical transceiver is further configured to;

send a reference signal to the receive end device; and

receive, by a management channel, a measurement result generated based on the reference signal, wherein a codeword and a carrier used for the management channel are fixed; and

the at least one processor is configured to;

obtain, according to the measurement result, the information indicating how the SNR changes with the frequency spectrum.

13. A data transmission method, comprising:

obtaining a radio signal by an input port;

determining, based on a correspondence between an input port and a bearer channel, a bearer channel corresponding to the radio signal, wherein the bearer channel is associated with a codeword, a frequency sub-band, and an optical wavelength;

performing Code Division Multiple Access (CDMA) modulation and carrier modulation on the radio signal according to the codeword and the frequency sub-band corresponding to the bearer channel to obtain a modulated electrical signal, wherein the CDMA modulation is performed according to the codeword associated with the bearer channel, and wherein the carrier modulation is performed according to the frequency sub-band associated with the bearer channel;

modulating the modulated electrical signal to the optical wavelength associated with the bearer channel to obtain a modulated optical signal; and

sending the modulated optical signal to an optical network.

14. The method according to claim 13, wherein the method further comprises:

measuring a channel to obtain information indicating how a signal-to-noise ratio (SNR) changes with a frequency spectrum;

determining at least one bearer channel according to the information indicating how the SNR changes with the frequency spectrum; and

establishing the correspondence between an input port and a bearer channel.

15. The method according to claim 13, wherein the method further comprises:

sending the correspondence to a receive end by a management channel, wherein the receive end demodulates the modulated optical signal according to the correspondence, wherein a codeword and a carrier used for the management channel are fixed.

16. The method according to claim 13, wherein the method further comprises:

receiving the correspondence by a management channel, wherein a codeword and a carrier used for the management channel are fixed.

17. The method according to claim 14, wherein measuring the channel comprises:

sending a reference signal;

receiving, using a management channel, a measurement result generated based on the reference signal, wherein a codeword and a carrier used for the management channel are fixed; and

determining, according to the measurement result, the information indicating how the SNR changes with the frequency spectrum.