Method for base station backhaul, related device and system for base station backhaul

Patent metadata

Field	Value
Publication number	US-10164731-B2
Application number	US-201615055324-A
Country	US
Kind code	B2
Filing date	Feb 26, 2016
Priority date	Aug 30, 2013
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

Embodiments of the present disclosure disclose a method for base station backhaul, a related device and a system for base station backhaul. The method for base station backhaul includes: modulating data carried on at least two channels to corresponding subcarriers respectively, combining and modulating the subcarriers to a first OFDM signal, sending a first broadband OFDM signal to a remote radio unit, sending, by the remote radio unit, the first broadband OFDM signal to an antenna port after splitting and filtering the same; receiving a second broadband OFDM signal sent by the remote radio unit, demodulating subcarriers included in the second broadband OFDM signal, and sending data obtained by demodulating to corresponding channels respectively. By adopting the present disclosure, a utilization rate of a link channel may be improved, and high-capacity base station backhaul may be achieved under a low cost condition.

First claim

What is claimed is:

1. A method for base station backhaul, comprising:
modulating data carried on at least two channels to corresponding sending carriers respectively, combining and modulating the sending carriers to a first broadband orthogonal frequency division combining (OFDM) signal, performing digital-analog conversion on the first broadband OFDM signal to generate a first analog broadband OFDM signal, and sending the first analog broadband OFDM signal to a remote radio unit in a radio over fiber manner; and
receiving a second analog broadband OFDM signal sent by the remote radio unit in the radio over fiber manner, performing analog-digital conversion on the second analog broadband OFDM signal to generate a second broadband OFDM signal, demodulating receiving carriers comprised in the second broadband OFDM signal, and sending data obtained by demodulating to channels corresponding to different receiving carriers respectively;
wherein the method further comprises:
modulating data carried on a low-rate common public radio interface (CPRI) channel after encoding the data to a first CPRI carrier, converting the first CPRI carrier into a digital modulation mode to generate a third broadband OFDM signal, sending the third broadband OFDM signal to the remote radio unit, recovering, by the remote radio unit, the third broadband OFDM signal to the first CPRI carrier and sending, by the remote radio unit, the first CPRI carrier to a low-rate remote radio unit through a CPRI interface, and sending, by the low-rate remote radio unit, the first CPRI carrier to an antenna port of the low-rate remote radio unit after performing radio frequency conversion on the first CPRI carrier; and
receiving a fourth broadband OFDM signal sent by the remote radio unit, recovering the fourth broadband OFDM signal to a second CPRI carrier, and sending the second CPRI carrier to the low-rate CPRI channel after demodulating and decoding the second CPRI carrier, wherein the remote radio unit receives the second CPRI carrier sent by the low-rate remote radio unit through the CPRI interface and converts the second CPRI carrier into the fourth broadband OFDM signal.

2. The method according to claim 1 , wherein the method further comprises:
before the modulating the data carried on the at least two channels to the corresponding sending carriers respectively, encoding the data carried on the at least two channels respectively; and
after the sending the data obtained by the demodulating to the channels corresponding to the different receiving carriers respectively, decoding the data respectively.

3. A method for base station backhaul, comprising:
modulating data carried on at least two channels to corresponding sending carriers respectively, combining and modulating the sending carriers to a first broadband orthogonal frequency division combining (OFDM) signal, performing digital-analog conversion on the first broadband OFDM signal to generate a first analog broadband OFDM signal, and sending the first analog broadband OFDM signal to a remote radio unit in a radio over fiber manner; and
receiving a second analog broadband OFDM signal sent by the remote radio unit in the radio over fiber manner, performing analog-digital conversion on the second analog broadband OFDM signal to generate a second broadband OFDM signal, demodulating receiving carriers comprised in the second broadband OFDM signal, and sending data obtained by demodulating to channels corresponding to different receiving carriers respectively;
wherein the method further comprises:
modulating data carried on a non-long term evolution (LTE) technology channel to a first non-LTE technology carrier after encoding the data, sending the first non-LTE technology carrier to the remote radio unit after performing up-conversion on the first non-LTE technology carrier, and sending, by the remote radio unit, the first non-LTE technology carrier to an antenna port; and
receiving a second non-LTE technology carrier sent by the remote radio unit, and sending the second non-LTE technology carrier to the non-LTE technology channel after demodulating and decoding the second non-LTE technology carrier, wherein the non-LTE technology is a universal mobile telecommunications system (UMTS) technology or a global system for mobile communications (GSM) technology.

4. A method for base station backhaul, comprising:
receiving a first analog broadband orthogonal frequency division combining (OFDM) signal sent by a base band unit in a radio over fiber manner, performing splitting processing on the first analog broadband OFDM signal to generate at least two first analog broadband OFDM sub-signals, and sending the at least two first analog broadband OFDM sub-signals to antenna ports corresponding to different first analog broadband OFDM sub-signals after performing filtering and frequency conversion on the at least two first analog broadband OFDM sub-signals respectively; and
receiving radio frequency signals through the antenna ports, performing frequency conversion and filtering on the radio frequency signals to obtain combined carriers corresponding to different antenna ports, performing combining processing on the combined carriers to generate a second analog broadband OFDM signal, and sending the second analog broadband OFDM signal to the base band unit in the radio over fiber manner.

5. The method according to claim 4 , wherein sending a first analog broadband OFDM sub-signal to a corresponding antenna port after performing filtering and frequency conversion on the first analog broadband OFDM sub-signal, comprises:
performing splitting processing on the first analog broadband OFDM sub-signal to generate at least two second analog broadband OFDM sub-signals;
performing frequency shift conversion on the second analog broadband OFDM sub-signals to generate first mixing signals;
performing band-pass filtering on the first mixing signals to generate sending carriers;
up converting a frequency of the sending carriers to a transmitting frequency; and
performing combining processing on the sending carriers after up-conversion, and sending the sending carriers to an antenna port corresponding to the sending carriers.

6. The method according to claim 5 , wherein performing frequency conversion and filtering on a radio frequency signal to obtain a corresponding combined carrier, comprises:
performing splitting processing on the radio frequency signal to generate at least two radio frequency sub-signals;
performing down-conversion on the radio frequency sub-signals;
performing band-pass filtering on the radio frequency sub-signals after the down-conversion to generate receiving carriers;
performing frequency shift conversion on the receiving carriers; and
performing combining processing on the receiving carriers after the frequency shift conversion to generate the combined carrier.

7. The method according to claim 5 , wherein the method further comprises:
receiving a third broadband OFDM signal sent by the base band unit, recovering the third broadband OFDM signal to a first common public radio interface (CPRI) carrier and sending the first CPRI carrier to a low-rate remote radio unit through a CPRI interface, and sending, by the low-rate remote radio unit, the first CPRI carrier to an antenna port of the low-rate remote radio unit after performing radio frequency conversion on the first CPRI carrier, wherein the third broadband OFDM signal is sent by the base band unit after encoding and modulating data carried on a low-rate CPRI channel to obtain the first CPRI carrier, and converting the first CPRI carrier in a digital modulation manner to generate the third broadband OFDM signal; and
receiving a second CPRI carrier sent by the low-rate remote radio unit throu

Assignees

• Huawei Tech Co Ltd

Inventors

• Ou Jian
• Xie Ronghua

Classifications

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04L27/2628

  Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators (H04L27/2634 takes precedence) · CPC title

• H04B10/548

  Phase or frequency modulation · CPC title

• H04J14/0298 Primary

  with sub-carrier multiplexing [SCM] · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title