WO2012037826A1

WO2012037826A1 - Radio frequency remote unit and abnormity detection method thereof

Info

Publication number: WO2012037826A1
Application number: PCT/CN2011/076044
Authority: WO
Inventors: 陈康康; 黄萍
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-09-25
Filing date: 2011-06-21
Publication date: 2012-03-29
Also published as: CN101951624A

Abstract

A radio frequency remote unit and an abnormity detection method thereof are disclosed by the present invention, wherein, the abnormity detection method of the radio frequency remote unit (RRU) includes that a current identity of the RRU (RRUID) is obtained at a set time interval, and the RRUID is compared with a primary RRUID of the RRU, a judgment is made to determine whether the two identities are concurrent, the RRUID is used for identifying a baseband processing unit (BBU) which is connected with the RRU; if the results judged are all non-concurrent within set comparing times, the RRU is determined to generate abnormity. By the present invention, the effect is achieved that the abnormity generated in the RRU is detected at the real time, the operation cost is low and the efficiency is high.

Description

TECHNICAL FIELD The present invention relates to a communication backbone or, in particular, to a radio remote unit (RRU) and an abnormality detecting method thereof. A distributed base station is a new type of base station in a new generation of serialized base stations. The base station is divided into a RRU (Radio Remote Unit) and a BBU (Building Baseband Unit). Through an open standard interface, such as the CPRI (Common Public Radio Interface) standard interface or the OBASK Open Base Station Architecture Initiative, the standard interface, which is connected by fiber optics, can be flexibly built. The RRU can be installed close to the antenna and connected to the BBU through the optical fiber to transmit the baseband signal through the optical fiber.

The RRU centrally places the large-capacity macrocell base station in the available central computer room, and the baseband part is processed centrally, and the radio frequency module in the base station is pulled to the remote radio unit by the optical fiber, and is placed on the site determined by the network planning, thereby Saves the large number of machine rooms required for conventional solutions. At the same time, the conversion between capacity and coverage can be achieved by using a large-capacity macro base station to support a large number of fiber extensions. When downlinking, the baseband signal is down-converted, filtered, filtered by RF, amplified by a linear power amplifier, and transmitted to the antenna through transmission filtering. When uplinking, the received uplink signal of the mobile terminal is filtered, low-noise amplified, and further RF is small. The signal is amplified and down-converted, and then analog-to-digital conversion and digital intermediate frequency processing are performed. Currently, the RRU used by the radio base station needs to be connected to the baseband side of the BBU and the communication is normal before it can work normally. In some cases, if the RRU is disconnected from the original connected BBU and connected to another BBU, it will affect the normal operation of the current RRU, making it unable to perform normal tasks. Normally, it is necessary to manually detect the abnormality of the RRU, which results in the failure to detect the abnormality and correct it in time, and detects the efficiency. The manual operation such as manual reset or restart of the RRU solves the above-mentioned RRU due to the original connected BBU. Disconnecting and failing to provide normal monthly services is labor intensive, high in operating costs, and inefficient. SUMMARY OF THE INVENTION A primary object of the present invention is to provide an RRU and an abnormality detecting method thereof, which solves the problem of high operating cost and low efficiency when the manual detection solves the problem that the RRU cannot be normalized in the related art. According to an aspect of the present invention, an abnormality detecting method for an RRU is provided, including: obtaining a current identifier RRUID of an RRU every predetermined time interval, and comparing with an original RRUID of the RRU, determining whether the two are consistent, RRUID The BBU used to identify the RRU connection; if the result of the judgment is inconsistent within the set comparison times, it is determined that the RRU is abnormal. Preferably, after the step of determining that the RRU is abnormal, the method further includes: resetting the RRU. Preferably, after the step of resetting the RRU, the method further comprises: recording a reset scene of the RRU in a snapshot form. Preferably, the step of acquiring the current identifier RRUID of the RRU at the set time interval includes: obtaining, by the RRU, the current RRUID of the RRU allocated by the BBU through the bottom field programmable gate array FPGA. Preferably, the time interval is set to 3 seconds, and the number of comparisons is set to 10 times. According to another aspect of the present invention, an RRU is provided, including: an obtaining module, configured to acquire a current identifier RRUID of an RRU at a set time interval, where the RRUID is used to identify a baseband processing unit BBU to which the RRU is connected; and a comparison module, After the acquiring module obtains the current RRUID of the RRU every set time interval, it compares with the original RRUID of the RRU to determine whether the two are consistent; the decision module is set to determine the comparison module within the set comparison times. The results are all inconsistent, and it is determined that the RRU is abnormal. Preferably, the RRU further includes: a reset module, configured to reset the RRU after the decision module determines that the RRU is abnormal. Preferably, the RRU further comprises: a recording module configured to record, in a snapshot form, a reset scene in which the reset module resets the RRU. Preferably, the obtaining module comprises: a bottom layer obtaining module, configured to acquire, by using the bottom field programmable gate array FPGA, the current RRUID of the RRU allocated by the BBU at every set time interval. Preferably, the time interval is set to 3 seconds, and the number of comparisons is set to 10 times.

2 rto / o According to the present invention, the current RRUID of the RRU is periodically obtained and compared with the original RRUID when the RRU is powered on. If the results of the thousands of comparisons are inconsistent, the RRU is abnormal, and the RRU is reset, and the related technology is solved. In the case of manual detection, when the RRU fails to perform the normal operation, the abnormality cannot be detected in time, and the operation cost is high and the efficiency is low, thereby realizing the abnormality of detecting the RRU in real time, the operation cost is low, and the efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing the steps of an abnormality detecting method for an RRU according to an embodiment of the present invention; FIG. 2 is a flow chart showing the steps of an abnormality detecting method for another RRU according to an embodiment of the present invention. FIG. 3 is a schematic diagram of an RRUID acquisition process according to an embodiment of the present invention; FIG. 4 is a structural block diagram of an RRU according to an embodiment of the present invention; FIG. 5 is another embodiment of the present invention. Schematic diagram of the structure of the RRU. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Referring to FIG. 1, a flow chart of steps of an abnormality detecting method for an RRU according to an embodiment of the present invention is shown. The RRUID is used to identify the current BBU to which the RRU is connected. The RRUID is allocated by the BBU. The RRUID assigned to the RRU is different for each BBU. When the BBU connected to the RRU is switched, the RRUID changes. In this embodiment, the RRUID is periodically detected. If the RRUID is found to be changed, the RRU is considered to be abnormal, and then the RRU may be attempted to be reset. The method for detecting an abnormality of the RRU in this embodiment includes the following steps: Step S102: The RRU obtains the current identifier RRUID of the RRU at a set time interval, and compares with the original RRUID of the RRU to determine whether the two are consistent. The RRUID is used to identify the current BBU of the RRU connection, and the original RRUID is used to indicate the RRUID obtained when the RRU is powered on. If the RRU is performed multiple times before the RRU is switched, the original RRUID is the RRUID obtained after the last switch reset of the RRU, and the RRU ID obtained during power-on, such as the RRU, is switched three times, and the switch is switched; '1 page order is BBU1, BBU2 and BBU3, where BBU3 is the BBU to which the RRU is currently connected, then the current RRUID of the RRU is the RRUID assigned by the BBU3, and the original RRUID is the RRUID assigned by the BBU2. It should be noted that, in the case that the BBU switching speed is fast, since the switching time is not long enough, and the RRUID detection has a detection period and needs to be accumulated, it is possible that the RRU has not been reset at the time of detection, and the original RRUID may be The RRUID described above is different. For example, the BRU switch is performed in the RRU. The switch sequence is BBU1, BBU2, and BBU3. The BBU3 is the BBU currently connected to the RRU. The current RRUID of the RRU is the RRUID assigned by the BBU3. The RRU has not been reset after switching to BBU3. At this time, the original RRUID detected is still the RRUID allocated by BBU1, not the RRUID allocated by BBU2. When the RRU obtains the RRUID, it can be obtained through the underlying FPGA (Field Programmable Gate Array). Using the underlying FPGA, you can effectively ensure that the RRU obtains the RRUID. The time interval can be appropriately set by a person skilled in the art according to actual needs, and the present invention does not limit this. Preferably, the time interval is set to 3 seconds. On the one hand, the RRU abnormality can be effectively ensured to be detected in time, and on the other hand, the RRU is not frequently acquired, thereby causing a burden on the system. Step S104: If the RRU is inconsistent within the set comparison times, it is determined that the RRU is abnormal. The number of comparisons can be appropriately set by a person skilled in the art according to actual needs, and the present invention does not limit this. Preferably, the number of comparisons is set to 10 times. When the comparison result of the number of connection comparisons (such as 10 times) is that the current RRUID is inconsistent with the original RRUID, it indicates that the BBU connected to the RRU has changed, and thus the RRU service exception occurs. The number of comparisons is set to 10 times, which fully ensures that the RRU does not process abnormally, which improves the accuracy of system abnormality detection and processing, and avoids misjudgment and mishandling caused by system jitter. In the related art, it is necessary to manually detect an abnormality that occurs when the RRU switches the BBU. Therefore, the detection efficiency is low and the operation cost is high. In this embodiment, the current RRUID of the RRU is obtained periodically, and compared with the original RRUID when the RRU is powered on. If the results of the thousands of comparisons are inconsistent, it is determined that the RRU is abnormal due to the BBU switching, and the related technology is solved. , manual detection solves RRU When the normal operation is not possible, the abnormality cannot be found in time, and the operation cost is high, and the problem under the efficiency is achieved, and the abnormality occurring when the RRU switches the BBU in real time is detected, and the operation cost is low and the efficiency is high. Referring to FIG. 2, a flow chart showing the steps of an abnormality detecting method of another RRU according to an embodiment of the present invention is shown. In this embodiment, the current RRUID of the RRU is obtained periodically, and compared with the original RRUID obtained at the time of power-on. If the result of the thousand comparisons is that the current RRUID is changed from the original RRUID, the RRU is attempted to be reset. The method for detecting an abnormality of the RRU in this embodiment includes the following steps: Step S202: The RRU obtains the original RRUID. In this embodiment, the RRUID is allocated by the BBU, and the lower layer FPGA of the BBU-RRU interface board is sent to the RRU FPGA. The RRU's upper application software obtains the RRUID from the RRU underlying FPGA. In this step, the original RRUID is obtained by the RRU at the initial power-on. The acquisition process is shown in Figure 3. Step S204: After the RRU is powered on, the current RRUID is obtained every 3 seconds, and the obtained current RRUID is compared with the original RRUID for 10 consecutive times, if not, the processing is not performed; if not, step S206 is performed; It should be noted that, when the current RRUID is OxFF or OxFE, it is considered that the BBU side main control board or the RRU interface board is not working properly, and the BBU is not changed. If it is detected that the RRUID is changed from the original RRUID, it is considered that the BBU connected to the RRU is changed, and then the operation of resetting the RRU is performed. Step 4 S206: The RRU resets and records the reset scene into the black box as a snapshot. The black box is a storage space, in which the reason why the RRU is abnormal every time, and the processing method for the abnormal cause are stored. By resetting the RRU, the abnormality of the RRU, such as switching the BBU, can be automatically detected and restored in time, so that the RRU can provide normal services without manual operations, saving operating costs and improving abnormalities. Detection and recovery efficiency. The reset scene is recorded in the form of a snapshot, which facilitates the RRU to process and solve the same problem that occurs again. Referring to FIG. 4, a block diagram of an RRU according to an embodiment of the present invention is shown, including: an obtaining module 402, configured to acquire a current RRUID of an RRU at a set time interval, where the RRUID is used to identify the RRU The comparison module 404 is configured to: after obtaining the current RRUID of the RRU at the set time interval of the obtaining module 402, compare with the original RRUID of the RRU to determine whether the two are consistent; the decision module 406 is set to be Within the determined number of comparisons, if the judgment results of the comparison module 404 are all inconsistent, it is determined that the RRU is abnormal. Preferably, the RRU of this embodiment further includes: a reset module 408, configured to reset the RRU after the decision module 406 determines that the RRU is abnormal. Preferably, the RRU of the embodiment further includes: a recording module 410 configured to record, in a snapshot form, a reset scene in which the reset module 408 resets the RRU. Preferably, the obtaining module 402 includes: an underlay obtaining module 4022, configured to acquire, by using the underlying FPGA, the current RRUID of the RRU allocated by the BBU at every set time interval. Preferably, the time interval is set to 3 seconds, and the number of comparisons is set to 10 times. Referring to FIG. 5, a schematic structural view of another RRU according to an embodiment of the present invention is shown. In this embodiment, the original RRUID acquisition module 502, the current RRUID acquisition module 504, the RRUID comparison and decision module 506, and the RRU reset module 508 are set in the RRU. The original RRUID obtaining module 502 is configured to acquire the original RRUID at the initial stage of the RRU power-on. The current RRUID obtaining module 504 is responsible for periodically obtaining the current RRUID after the power-on is completed. In this embodiment, the RRUID is allocated by the BBU side, and the lower layer FPGA of the BBU-RRU interface board is sent to the RRU bottom layer FPGA, and the upper layer application software of the RRU obtains the RRUID from the bottom layer FPGA of the RRU.

The RRUID comparison and decision module 506 combines the functions of the comparison module 404 and the decision module 406 in the embodiment of FIG. 4 for performing RRUID comparisons, determining whether the RRUID has changed, and whether a reset is initiated. The RRU reset module 508 performs a reset operation of the RRU and records the reset scene as a snapshot into the black box. It should be noted that, for the sake of clarity, the original RRUID obtaining module 502 and the current RRUID obtaining module 504 are set in this embodiment, but in actual use, the original RRUID acquiring module may be used. The 502 and the current RRUID obtaining module 504 are combined into one, that is, the RRUID acquiring module is responsible for acquiring the original RRUID at the initial stage of the RRU power-on, and is also responsible for periodically obtaining the current RRUID after the power-on is completed. At the initial stage of power-on, the original RRUID is obtained by the original RRUID obtaining module 502. After the RRU is powered on, the current RRUID obtaining module 504 periodically obtains the current RRUID, and the RRUID comparison and decision module 506 compares whether the decision needs to perform the reset RRU. If the result of the decision is that an RRU reset needs to be performed, the RRU reset module 508 performs a reset RRU, and records the reset scene into a black box in the form of a snapshot. The RRU device of the CDMA product is taken as an example to illustrate how the CDMA product can use the method of the present invention to solve the problem that the RRU cannot work normally after the BBU connected to the RRU changes.

The RRU device of the CDMA product obtains the original RRUID on the RRU board. After the power is turned on, the current RRUID is obtained and compared with the original RRUID. When the current RRUID is OxFF or OxFE, the BBU side master is considered. The board or the interface board of the RRU is not working properly. The BBU is not considered to be changed. Except for the jtl condition, if the RRUID is changed 10 times compared with the original RRUID, and the BBU connected to the RRU is changed, the reset is performed. The operation of the RRU. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. An abnormality detecting method for a radio remote unit RRU, including:

Obtaining the current identifier RRUID of the RRU at a set time interval, and comparing with the original RRUID of the RRU, determining whether the two are consistent, the RRUID is used to identify the baseband processing unit BBU to which the RRU is connected;

If the result of the judgment is inconsistent within the set number of comparisons, it is determined that the RRU is abnormal.

The method according to claim 1, wherein, after the step of determining that the RRU is abnormal, the method further includes:

The RRU is reset.

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

In the form of a snapshot, the RRU reset scene is recorded.

The method according to any one of claims 1 to 3, wherein the step of acquiring the current identifier RRUID of the RRU every set time interval comprises:

The RRU obtains the current RRUID of the RRU allocated by the BBU by using the underlying field programmable gate array FPGA.

5. The method according to claim 4, wherein the time interval is set to 3 seconds, and the comparison number is set to 10 times.

6. - RF remote unit RRU, including:

Obtaining a module, configured to acquire a current identifier RRUID of the RRU, and the RRUID is used to identify the baseband processing unit BBU connected to the RRU;

The comparison module is configured to: after obtaining the current RRUID of the RRU at the set time interval of the obtaining module, compare with the original RRUID of the RRU to determine whether the two are consistent; the decision module is set to be compared in the setting If the judgment result of the comparison module is inconsistent within the number of times, it is determined that the RRU is abnormal.

The RRU according to claim 6, wherein the RRU further comprises: a reset module, configured to reset the RRU after the decision module determines that the RRU is abnormal.

The RRU according to claim 7, wherein the RRU further includes:

And a recording module configured to record, in a snapshot form, a reset scene in which the reset module resets the RRU.

The RRU according to any one of claims 6 to 8, wherein the obtaining module comprises: a bottom layer obtaining module, configured to acquire the BBU at a set time interval by using an underlying field programmable gate array FPGA The current RRUID of the assigned RRU.

The RRU according to claim 9, wherein the time interval is set to 3 seconds, and the comparison time is set to 10 times.