CN101951624A

CN101951624A - Remote radio unit and abnormality detection method thereof

Info

Publication number: CN101951624A
Application number: CN2010102939618A
Authority: CN
Inventors: 陈康康; 黄萍
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-09-25
Filing date: 2010-09-25
Publication date: 2011-01-19
Also published as: WO2012037826A1

Abstract

The invention discloses a remote radio unit and an abnormality detection method thereof. The abnormality detection method of the remote radio unit comprises the steps of: acquiring a current identification RRUID of RRU at intervals of set time interval and comparing the current RRUID with an original RRUID of the RRU to judge whether the both are consistent, wherein the RRUID is used for identifying a baseband based unit BBU with which the RRU is connected; and if the judging result shows inconsistency within the set comparison times, determining that the RRU is abnormal. With the help of the method, the purpose of detecting the abnormalities of the RRU in real-time is reached, and the effect of low operation cost and high efficiency is achieved.

Description

Remote radio unit and abnormality detection method thereof

Technical Field

The present invention relates to the field of communications, and in particular, to a Radio Remote Unit (RRU) and an abnormality detection method thereof.

Background

The distributed Base Station is a new-type Base Station in a new-generation serialized Base Station, and divides the Base Station into an RRU (Radio Remote Unit) and a BBU (building Base band Unit), and the two are connected by an Open standard Interface, such as a CPRI (Common Public Radio Interface) standard Interface or an OBASI (Open Base Station Architecture) standard Interface, through an optical fiber, so that a network can be established very flexibly. The RRU may be mounted close to the antenna and connected to the BBU via optical fibers to enable transmission of baseband signals via optical fibers.

The RRU intensively places the large-capacity macro-cellular base stations in an available central machine room, the baseband part intensively processes the large-capacity macro-cellular base stations, and the radio frequency modules in the base stations are pulled to remote radio frequency units by adopting optical fibers and are respectively placed on sites determined by network planning, so that a large number of machine rooms required by conventional solutions are saved. Meanwhile, the large-capacity macro base station is adopted to support large-scale optical fiber zooming, so that conversion between capacity and coverage can be realized. During downlink, the downlink of the baseband signal is subjected to frequency conversion, filtering, radio frequency filtering, amplification and transmission filtering by a linear power amplifier and then transmitted to an antenna; during uplink, the received uplink signal of the mobile terminal is subjected to filtering, low-noise amplification, further radio frequency small signal amplification and filtering, and down-conversion, and then analog-to-digital conversion, digital intermediate frequency processing and the like are completed.

At present, the RRU used by the radio base station needs to be connected to the baseband side of the BBU and the communication is normal, so that the RRU can normally work. In some cases, if an RRU is disconnected from an originally connected BBU and is connected to another BBU instead, the current RRU may be affected from normal operation, so that the RRU cannot perform normal service.

Under normal conditions, the abnormality of the RRU needs to be detected manually, which causes that the abnormality cannot be found and corrected in time, and the detection efficiency is low; and the problem that the RRU cannot provide normal service due to disconnection with the BBU connected originally is solved through manual operation such as manual reset or restart of the RRU, so that the RRU consumes manpower, has high operation cost and low efficiency.

Disclosure of Invention

The present invention mainly aims to provide an RRU and an abnormality detection method thereof, so as to solve the problems of high operation cost and low efficiency when the RRU cannot be normally serviced by manual detection in the related art.

According to an aspect of the present invention, there is provided a method for detecting an abnormality of an RRU, including: acquiring a current identification RRUID of the RRU at set time intervals, comparing the current identification RRUID with an original RRUID of the RRU, and judging whether the current identification RRUID and the original RRUID are consistent, wherein the RRUID is used for identifying a BBU connected with the RRU; and if the judgment results are all inconsistent within the set comparison times, determining that the RRU is abnormal.

According to another aspect of the present invention, there is provided an RRU comprising: the acquisition module is used for acquiring the current identification RRUID of the RRU at set time intervals, and the RRUID is used for identifying a baseband processing unit (BBU) connected with the RRU; the comparison module is used for comparing the current RRUID of the RRU with the original RRUID of the RRU after the acquisition module acquires the current RRUID of the RRU at intervals of set time, and judging whether the current RRUID and the original RRUID of the RRU are consistent; and the decision module is used for determining that the RRU is abnormal if the judgment results of the comparison modules are inconsistent within the set comparison times.

According to the invention, the current RRUID of the RRU is obtained at regular time and compared with the original RRUID when the RRU is powered on, and when the comparison results of a plurality of times are inconsistent, the RRU is judged to be abnormal, and then the RRU is reset, so that the problems that the abnormality cannot be found in time, the operation cost is high, and the efficiency is low when the RRU cannot be normally served by manual detection in the related technology are solved, and the effects of real-time detection of the abnormality of the RRU, low operation cost and high efficiency are achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart illustrating steps of an abnormality detection method for RRU according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating steps of another RRU abnormality detection method according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a RRUID acquisition process according to an embodiment of the present invention;

fig. 4 is a block diagram of a RRU according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another RRU according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring to fig. 1, a flowchart illustrating steps of an abnormality detection method for RRU according to an embodiment of the present invention is shown. The RRUID is used for identifying the current BBU connected with the RRU, the RRUIDs are distributed by the BBU side, each BBU is different in RRUID distributed for the RRU, and when the BBU connected with the RRU is switched, the RRUID is changed accordingly. The embodiment performs timing detection on the RRUID, and if the RRUID is changed, the RRU is considered to be abnormal, so that the RRU can be tried to be reset.

The method for detecting the abnormality of the RRU in the embodiment includes the following steps:

step S102: the RRU acquires a current identification RRUID of the RRU at set time intervals, compares the RRUID with an original RRUID of the RRU and judges whether the RRUID and the original RRUID are consistent;

the RRUID is used for identifying the current BBU connected with the RRU, and the original RRUID is used for indicating the RRUID acquired when the RRU is powered on. If the RRU is switched for multiple times before the RRU, the original RRUID is the RRUID obtained when the RRU is powered on after the RRU is switched and reset for the last time, if the RRU is switched for 3 times, the switching sequence is BBU1, BBU2 and BBU3, wherein BBU3 is the BBU currently connected with the RRU, the current RRUID of the RRU is the RRUID allocated to BBU3, and the original RRUID is the RRUID allocated to BBU 2. It should be noted that, under the condition that the BBU switching speed is fast, because the switching time is not long enough, and the RRUID detection has a detection period and needs to be accumulated, the RRU is not reset during the detection, and the original RRUID may be different from the above-mentioned RRUID. Still take the example that the RRU has been subjected to BBU switching for 3 times, the switching order is BBU1, BBU2 and BBU3, wherein BBU3 is the BBU to which the RRU is currently connected, the current RRUID of the RRU is the RRUID allocated to BBU3, assuming that the switching speed of BBU2 and BBU3 is too fast, the RRU has not been reset after being switched to BBU3, at this time, the detected original RRUID is still the RRUID allocated to BBU1, but not the RRUID allocated to BBU 2.

When the RRU acquires the RRUID, it may be acquired through a bottom FPGA (field programmable gate array). And the bottom layer FPGA is used, so that the RRUID can be effectively obtained by the RRU.

The time interval can be set by those skilled in the art according to actual needs, and the present invention is not limited to this. Preferably, the time interval is set to 3 seconds, on one hand, the RRU abnormity can be effectively ensured to be detected in time, and on the other hand, the RRU is not frequently acquired, so that the system load is caused.

Step S104: and if the RRU judges that the results are inconsistent within the set comparison times, determining that the RRU is abnormal.

The number of comparison times can be set by those skilled in the art according to actual needs, and the present invention is not limited to this. Preferably, the number of comparisons is set to 10. And when the comparison result of the connection comparison times (such as 10 times) shows that the current RRUID is not consistent with the original RRUID, the BBU connected with the RRU is changed, and thus the RRU service is abnormal. The comparison frequency is set to 10 times, so that the RRU is fully ensured to be processed when the RRU is actually abnormal, the accuracy of system abnormal detection and processing is improved, and misjudgment and misprocessing caused by system jitter are avoided.

In the related art, the abnormality occurring when the RRU switches the BBU needs to be manually detected and found, so the detection efficiency is low and the operation cost is high. According to the embodiment, the current RRUID of the RRU is obtained regularly and compared with the original RRUID when the RRU is powered on, and when the comparison results of a plurality of times are inconsistent, the RRU is determined to be abnormal due to BBU switching, so that the problems that in the related technology, the abnormality cannot be found in time, the operation cost is high, the efficiency is low when the RRU cannot be normally served by manual detection are solved, and the effects of real-time detection of the abnormality occurring when the RRU switches the BBU, low operation cost and high efficiency are achieved.

Referring to fig. 2, a flowchart illustrating steps of another RRU abnormality detection method according to an embodiment of the present invention is shown. In this embodiment, the current RRUID of the RRU is obtained at regular time and compared with the original RRUID obtained when the RRU is powered on, and when the results of several comparisons indicate that the current RRUID is changed from the original RRUID, the RRU is tried to be reset.

step S202: the RRU acquires an original RRUID;

in this embodiment, the RRUID is allocated by the BBU side, and is issued to the RRU bottom FPGA through the bottom FPGA of the BBU-RRU interface board, and the upper application software of the RRU acquires the RRUID from the RRU bottom FPGA.

In this step, the original RRUID is obtained by the RRU at the initial power-on stage, and the obtaining process is shown in fig. 3.

Step S204: after the RRU is electrified, acquiring a current RRUID every 3 seconds, continuously comparing for 10 times to judge whether the acquired current RRUID is consistent with the original RRUID, and if so, not processing; if not, go to step S206;

it should be noted that, when the obtained current RRUID is 0xFF or 0xFE, it is considered that the operation of the BBU-side main control board or the interface board with the RRU is abnormal, but it is not considered that the BBU is changed, except this case, if it is detected that the RRUID is changed from the original RRUID for 10 consecutive times, it is considered that the BBU connected to the RRU is changed, and then the operation of resetting the RRU is performed.

Step S206: and resetting the RRU, and recording the reset site in a black box in a snapshot mode.

The black box is a storage space, and stores information such as the reason why the RRU is abnormal each time and the processing mode for the abnormal reason.

By resetting the RRU, the abnormality can be automatically detected and recovered in time after the RRU is abnormal, such as BBU switching, so that the RRU can provide normal service without manual operation, the operation cost is saved, and the abnormality detection and recovery efficiency is improved. And recording a reset site in a snapshot mode, so that the RRU can conveniently process and solve the same recurrent problem.

Referring to fig. 4, a block diagram of a RRU according to an embodiment of the present invention is shown, including:

an obtaining module 402, configured to obtain a current RRUID of an RRU at set time intervals, where the RRUID is used to identify a BBU to which the RRU is connected; a comparing module 404, configured to compare the current RRUID of the RRU with the original RRUID of the RRU after the obtaining module 402 obtains the current RRUID of the RRU at intervals of a set time interval, and determine whether the two are consistent; the decision module 406 is configured to determine that the RRU is abnormal if the determination results of the comparison module 404 are all inconsistent within the set comparison times.

Preferably, the RRU of this embodiment further includes: the resetting module 408 is configured to reset the RRU after the decision module 406 determines that the RRU is abnormal.

Preferably, the RRU of this embodiment further includes: the recording module 410 is configured to record, in a snapshot form, a reset field in which the reset module 408 resets the RRU.

Preferably, the obtaining module 402 includes: the bottom layer obtaining module 4022 is configured to obtain, through the bottom layer FPGA, the current RRUID of the RRU allocated by the BBU at intervals of a set time interval.

Preferably, the time interval is set to 3 seconds, and the number of comparisons is set to 10.

Referring to fig. 5, a schematic structural diagram of another RRU according to an embodiment of the present invention is shown. In this embodiment, an original RRUID acquisition module 502, a current RRUID acquisition module 504, an RRUID comparison and decision module 506, and an RRU reset module 508 are provided in the RRU.

Wherein,

the original RRUID acquisition module 502 is used for acquiring an original RRUID at the initial stage of powering on the RRU. The current RRUID acquisition module 504 is responsible for acquiring the current RRUID after the power-on is completed at regular time. In this embodiment, the RRUID is allocated by the BBU side, and is issued to the RRU bottom FPGA through the bottom FPGA of the BBU-RRU interface board, and the upper application software of the RRU acquires the RRUID from the RRU bottom FPGA.

The rrid comparison and decision module 506 combines the functions of the comparison module 404 and the decision module 406 in the embodiment shown in fig. 4 to perform the rrid comparison, decide whether the rrid has changed, and initiate a reset.

The RRU reset module 508 performs a reset operation of the RRU and records the reset field in the form of a snapshot into the black box.

It should be noted that, for the sake of clarity, the original RRUID acquisition module 502 and the current RRUID acquisition module 504 are provided in this embodiment, but in actual use, the original RRUID acquisition module 502 and the current RRUID acquisition module 504 may be combined into one, that is, one RRUID acquisition module is responsible for acquiring the original RRUID at the initial stage of powering on the RRU and also responsible for acquiring the current RRUID after powering on at regular time.

In the initial power-on stage, the original RRUID of the RRU is acquired by the original RRUID acquisition module 502; after the RRU is powered on, the current RRUID acquisition module 504 acquires the current RRUID regularly, and the RRUID comparison and decision module 506 makes a comparison to decide whether to execute RRU reset, if the decision result is that RRU reset needs to be executed, the RRU reset module 508 executes RRU reset, and records the reset field in a form of snapshot into the black box.

The following takes RRU equipment of a CDMA product as an example to illustrate how the CDMA product uses the method of the present invention to solve the problem that an RRU cannot normally operate after a BBU connected to the RRU is changed.

And when the obtained current RRUID is 0xFF or 0xFE, the BBU side main control board or the interface board of the RRU is considered to be abnormally operated, the BBU is not considered to be changed, and except the situation, if the RRUID is detected to be changed from the original RRUID continuously for 10 times, the BBU connected with the RRU is considered to be changed, the RRU resetting operation is executed.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An abnormality detection method for a Radio Remote Unit (RRU) is characterized by comprising the following steps:

acquiring a current identification RRUID of the RRU at set time intervals, comparing the current identification RRUID with an original RRUID of the RRU, and judging whether the current identification RRUID and the original RRUID are consistent, wherein the RRUID is used for identifying a baseband processing unit (BBU) connected with the RRU;

and if the judgment results are all inconsistent within the set comparison times, determining that the RRU is abnormal.

2. The method of claim 1, wherein after the step of determining that the RRU is abnormal, the method further comprises:

and resetting the RRU.

3. The method of claim 2, wherein after the step of resetting the RRU, further comprising:

and recording the reset site of the RRU in a snapshot form.

4. The method according to any of claims 1 to 3, wherein the step of obtaining the current identification RRUID of the RRU at set time intervals comprises:

and the RRU acquires the current RRUID of the RRU distributed by the BBU at set time intervals through a bottom Field Programmable Gate Array (FPGA).

5. The method of claim 4, wherein the time interval is set to 3 seconds and the number of comparisons is set to 10.

6. A remote radio unit, RRU, comprising:

the acquisition module is used for acquiring the current identification RRUID of the RRU at set time intervals, and the RRUID is used for identifying a baseband processing unit (BBU) connected with the RRU;

the comparison module is used for comparing the current RRUID of the RRU with the original RRUID of the RRU after the acquisition module acquires the current RRUID of the RRU at intervals of set time, and judging whether the current RRUID and the original RRUID of the RRU are consistent;

and the decision module is used for determining that the RRU is abnormal if the judgment results of the comparison modules are inconsistent within the set comparison times.

7. The RRU of claim 6, further comprising:

and the resetting module is used for resetting the RRU after the decision module determines that the RRU is abnormal.

8. The RRU of claim 7, further comprising:

and the recording module is used for recording a reset site for resetting the RRU by the reset module in a snapshot form.

9. The RRU of any of claims 6-8, wherein the means for obtaining comprises:

and the bottom layer acquisition module is used for acquiring the current RRUID of the RRU distributed by the BBU at set time intervals through a bottom layer field programmable gate array FPGA.

10. The RRU of claim 9 wherein the time interval is set to 3 seconds and the number of comparisons is set to 10.