WO2014106399A1

WO2014106399A1 - Method and system for protecting power amplifier of radio remote unit by base band unit of base station

Info

Publication number: WO2014106399A1
Application number: PCT/CN2013/084226
Authority: WO
Inventors: 滕秋菊; 庄荣海
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-01-06
Filing date: 2013-09-25
Publication date: 2014-07-10
Also published as: CN103916895A; CN103916895B

Abstract

Provided are a method and system for protecting a power amplifier of a radio remote unit by a base band unit of a base station. The method comprises: a base band unit (BBU) detecting a reset event initiated by a user in real time; if a reset event is detected, deleting an in-phase/quadrature-phase IQ link of a radio remote unit (RRU) or controlling a power amplifier of the RRU to be switched off; and after the reset event has finished, re-establishing a link of the RRU or controlling the power amplifier of the RRU to be switched on.The present invention solves the problem of a power amplifier burning out caused by abnormal data entering the power amplifier of an RRU when a BBU system reset, RRU interface board reset or product subsystem reset is manually initiated, so as to achieve the effect of protecting the RRU.

Description

TECHNICAL FIELD The present invention relates to the field of mobile communications, and in particular, to a method and related system for protecting a radio remote unit RRU power amplifier on a baseband unit BBU side. Background Art A base station system is composed of a BBU and an RRU, as shown in FIG. The power amplifier of the RRU is the core component of the RRU. The stability and reliability of the work directly affect the base station's direct operation and ensure the normal coverage of the cell. Since the power amplifier is a high-power device, if abnormal data such as wide-spectrum signals, high average power, and burrs are entered during the operation of the base station, the power amplifier may be burned out. At present, most of the power amplifier protection technology is self-protected on the RRU side, as shown in Figure 2. It is implemented by a combination of hardware detection and RRU software control. By detecting the power of the in-phase/quadrature phase signal and detecting that the power amplifier may be burnt out, the power amplifier is turned off and the transmit power is reduced to protect the power amplifier.

There are many RRU models, and there are differences in the abnormal data protection capabilities of various types of RRU power amplifiers. When the RRU side is not perfect for the design of abnormal data protection, or it is not 100% reliable, there is a possibility of burning the power amplifier. From the experimental data, if the artificially initiated BBU system reset, RRU interface board reset or product subsystem reset, abnormal data will enter the RRU power amplifier, causing the power amplifier to burn out. SUMMARY OF THE INVENTION An object of the present invention is to provide a base station baseband unit to protect a radio remote unit power amplifier method and system, which can better solve the problem of abnormal data entering the RRU power amplifier when the BBU system reset, the RRU interface board reset, or the product subsystem reset is artificially initiated. And the problem that caused the power amplifier to burn out. According to an aspect of the present invention, a method for a base station unit to protect a radio remote unit power amplifier is provided, including: a baseband unit BBU detects a user-initiated reset event in real time; and if a reset event is detected, deleting a radio remote unit RRU In-phase/quadrature phase link or control RRU power amplifier shutdown; After the reset event ends, re-establish the RRU IQ link or control the RRU amplifier to be turned on. Preferably, the reset event comprises a BBU system reset or a RRU interface board reset or a product subsystem reset. Preferably, if the reset event is a BBU system reset, the BBU initiates a reset request to all RRUs to turn off all RRU power amplifiers by resetting all RRUs. Preferably, after receiving the acknowledgement message of the RRU in response to the reset request, the BBU controls the peripheral board to be powered down, and starts the main control board reset. Preferably, if the reset event is a reset of the RRU interface board, the BBU deletes the IQ link of the RRU corresponding to the RRU interface board. Preferably, after the IQ link of the RRU is deleted, the BBU sends a notification message for resetting to the RRU interface board, so as to reset the RRU interface board. Preferably, if the reset event is a product subsystem reset, the BBU deletes the cell on the RRU corresponding to the product subsystem, and deletes the IQ link of the RRU. Preferably, after the IQ link of the RRU is deleted, the BBU initiates a product-related board reset corresponding to the product subsystem. According to another aspect of the present invention, a base station baseband unit for protecting a radio remote unit power amplifier is provided, comprising: a baseband unit BBU, configured to detect a user-initiated reset event in real time, and delete the radio frequency when a reset event is detected The in-phase/quadrature phase link of the remote unit RRU or the control RRU power amplifier is turned off, and the RRU IQ link is re-established after the reset event ends; the radio remote unit RRU is set to turn off the RRU power amplifier under the control of the BBU. , and after the reset event is over, re-open the RRU amplifier. Preferably, the BBU comprises: a human-machine interaction module, configured to detect a reset event in real time, the reset event comprising a BBU system reset or a RRU interface board reset or a product subsystem reset. Compared with the related art, the beneficial effects of the present invention are: In view of the limitations and imperfections of the RRU side power amplifier protection, the present invention increases the processing from the BBU side for the link that may cause the power amplifier to be damaged, and effectively protects the power amplifier of the RRU. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a connection diagram of a BBU and an RRU provided by the prior art; FIG. 2 is a schematic diagram of a power amplifier protection position provided by the prior art; FIG. 3 is a base station unit protection radio remote unit power amplifier provided by an embodiment of the present invention; FIG. 4 is a logic block diagram of a main control board according to an embodiment of the present invention; FIG. 5 is a block diagram of an RRU connecting two RRU interface boards according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. The present invention provides a method for protecting a RRU power amplifier by a BBU, which is used to prevent damage to the RRU power amplifier when the BRU system is reset, the RRU interface board is reset, and the product subsystem is reset.

There are two necessary conditions for the RRU amplifier to burn out: 1. The RRU amplifier is turned on;

2. There is abnormal data flowing into the RRU amplifier through the IQ link. The invention achieves the purpose of protecting the RRU power amplifier by making one of the conditions unsatisfactory. FIG. 3 is a block diagram of a method for protecting a radio remote unit power amplifier by a base station unit according to an embodiment of the present invention. As shown in FIG. 3, the steps include: Step 301: A baseband unit BBU detects a user-initiated reset event in real time. In step 301, the reset event includes a BBU system reset or a RRU interface board reset or a product subsystem reset. Step 302: If a reset event is detected, delete the in-phase/quadrature phase link of the radio remote unit RRU or control the RRU power amplifier to be turned off. A. If the detected reset event is a BBU system reset, the BBU initiates a reset request to all RRUs to reset all RRU amplifiers by resetting all RRUs. After receiving the acknowledgement message from the RRU in response to the reset request, the BBU controls the peripheral board to power down and starts the main control board reset. That is to say, when the BBU system is reset, before the abnormal data enters the RRU, the power amplifier of the RRU is turned off, which includes the following steps: Al, the user inputs the man-machine command (including base station reset, system version upgrade, main control board reset), BBU detection. Reset event

A2. After detecting the above reset event, the BBU initiates a reset request to the RRU.

A3. After receiving the reset message, the RRU turns off the RRU power amplifier and responds to the BBU with a confirmation message that the reset is successful. A4. After receiving the acknowledgement message, the BBU resets the BBU.

B. If the detected reset event is the RRU interface board reset, the BBU deletes the IQ link of the RRU corresponding to the RRU interface board. After the RRU's IQ link is deleted, the BBU sends a notification message for reset to the RRU interface board to reset the RRU interface board. That is, when the RRU interface board is reset, the IQ exchange relationship is deleted.

(Equivalent to disconnecting the IQ channel, see the IQ switch module shown in Figure 2), to prevent abnormal data from flowing into the RRU amplifier through the IQ channel. The specific steps include:

Bl, the user inputs the man-machine command (RRU interface board reset), and the BBU detects the reset event;

After the B2 detects the reset event, the BBU deletes the IQ link of the RRU, so that no abnormal data enters the RRU power amplifier.

B3. Reset the RRU interface board. C. If the detected reset event is a product subsystem reset, the BBU deletes the cell on the RRU corresponding to the product subsystem, and deletes the IQ link of the RRU. After the RRU's IQ link is deleted, the BBU starts the product-related board reset corresponding to the product subsystem. That is to say, when the product subsystem is reset, the abnormality data is prevented from flowing into the RRU power amplifier through the IQ channel by deleting the exchange relationship, and the specific steps include:

Cl, user input man-machine command (product system reset, product standard upgrade), BBU detects reset event; C2, BBU detects the above reset event, deletes the cell on the RRU;

C3. The BBU deletes the IQ link of the RRU, so that no abnormal data enters the RRU power amplifier. C4. Product related board reset. Step 303: After the reset event ends, re-establish the IQ link of the RRU or control the RRU power amplifier to be enabled. The present invention also provides a base station baseband unit for protecting a radio remote unit power amplifier, comprising: a baseband unit BBU, configured to detect a user-initiated reset event in real time, and deleting the radio remote unit RRU when a reset event is detected The in-phase/quadrature phase link or control RRU power amplifier is turned off, and after the reset event ends, the RRU IQ link is re-established; the radio remote unit RRU is set to turn off the RRU power amplifier under the control of the BBU, and in the reset event After the end, the cell is established on the RRU, and the RRU power amplifier is turned on again. 4 is a logic block diagram of a main control board according to an embodiment of the present invention. As shown in FIG. 4, the method includes: a human-machine interaction module, configured to detect a user-initiated reset event in real time, and the reset event includes a BBU system reset or an RRU interface. Board reset or product subsystem reset. The control module is configured to, when a reset event is detected, control the product subsystem to delete the in-phase/quadrature phase IQ link of the radio remote unit RRU or control the RRU reset, and the RRU turns off the attack and release; the product subsystem is set to be in the control module The RRU link is deleted under the control, and the RRU IQ link is re-established after the reset event ends. The main control board is set in the BBU. FIG. 5 is a block diagram of an RRU connecting two RRU interface boards according to an embodiment of the present invention. As shown in FIG. 5, the specific implementation steps of the BRU side protection RRU power amplifier are as follows: Embodiment 1, BBU system reset 1. Base station reset first step The user initiates the base station reset, the human-machine interaction module detects the reset event, and sends a message to the control module. The control module sends a reset message to all the RRUs. The logic diagram of the main control board is shown in Figure 4. The second step is based on the received reset. The message is reset, and the RRU power amplifier is turned off. At this time, although there is abnormal data, it does not enter the RRU power amplifier. In the third step, the RRU responds to the BBU with a confirmation message of successful reset. In the fourth step, after the BBU receives the confirmation message, the control module sends a power-down message to all the peripheral boards to reset the peripheral board. In the fifth step, the control module starts the main control board reset.

2. The system version is upgraded. The user initiates the system version upgrade. The human-machine interaction module detects the reset event and sends a message to the control module. The control module sends a message to all RRUs. The second step is based on the received reset message. Reset, the RRU power amplifier is turned off. At this time, although there is abnormal data, it will not enter the RRU power amplifier. The third step, the RRU responds to the BBU with a confirmation message of successful reset. The fourth step, after the BBU receives the confirmation message, the control module All peripheral boards send a power-down message to reset the peripheral board. In the fifth step, the control module starts the main board reset.

3. The main control board resets the first step, the user resets the main control board, the human-machine interaction module detects the reset event, and sends a message to the control module. The control module sends a message to all RRUs. The second step, the RRU is reset according to the received The message is reset, and the RRU power amplifier is turned off. At this time, although there is abnormal data, it does not enter the RRU power amplifier. The third step, the RRU responds to the BBU with a confirmation message of successful reset. The fourth step, after the BBU receives the confirmation message, the control module Send a power-down message to all peripheral boards to reset the peripheral board. Step 5: The control module starts the main board reset. Embodiment 2: RRU interface board reset The common mode RRU is connected to two RRU interface boards, and the RRU interface board is an optical interface board. As shown in FIG. 5, if one of the optical interface boards is reset, the RRU power amplifier is turned off, which may result in The cell service coming through another optical interface board is directly interrupted. Therefore, the optical interface board reset adopts the IQ link that deletes the RRU (the deleted RRU IQ chain) The way the way corresponds to the IQ link of the interface board to be reset, prevents abnormal data from flowing into the RRU's power amplifier through the IQ channel. In the first step, the user triggers the reset of the RRU interface board. In the second step, the human-machine interaction module detects the reset event, notifies the control module, and the control module notifies the product to delete the IQ link of the RRU, and the IQ link is deleted, so that no abnormal data enters the RRU. The power amplifier, thereby protecting the power amplifier of the RRU; the third step, the control module notifies the RRU interface board to reset; the fourth step, the RRU interface board is powered down and reset. Embodiment 3: Product Subsystem Reset For a dual mode RRU, the RRU carries both the TD-SCDMA service and the TDLTE service.

When the TD-SCDMA product subsystem is reset, shutting down the RRU's power amplifier will cause the TDLTE service to be interrupted and unacceptable. Therefore, when the TD-SCDMA product is reset, the RRU amplifier is protected by deleting the IQ link corresponding to the TD-SCDMA product.

1. The first step of the product standard reset, the user triggers the product system reset; the second step, after the human-computer interaction module detects the reset event, notifies the control module, the control module notifies the product to reset the product system; the third step, the product delete product The fourth step is to remove the link of the RRU, so that no abnormal data enters the RRU power amplifier, thereby protecting the power amplifier of the RRU. The fifth step is to reset the product related board.

2. The first step of the product standard upgrade, the user triggers the product standard upgrade; the second step, after detecting the reset event, the human interaction module notifies the control module, and the control module notifies the product subsystem to reset; The third step is to delete the product service of the product. The fourth step is to delete the IQ link of the RRU, so that no abnormal data enters the RRU power amplifier, thereby protecting the RRU power amplifier. The fifth step is to reset the product related board. Of course, the present invention is also applicable to a variety of other embodiments, and can be applied to a variety of wireless single-mode and multi-mode products, without departing from the spirit and scope of the present invention, those skilled in the art can The invention is susceptible to various modifications and changes. Although the invention has been described in detail above, the invention is not limited thereto, and various modifications may be made by those skilled in the art in accordance with the principles of the invention. Therefore, modifications made in accordance with the principles of the invention should be construed as falling within the scope of the invention.

Claims

The method of claim, a base station baseband unit for protecting a radio remote unit power amplifier, comprising:

Baseband unit BBU detects user-initiated reset events in real time;

If a reset event is detected, the in-phase/quadrature phase link of the radio remote unit RRU or the control RRU power amplifier is turned off;

After the reset event is over, re-establish the RRU's IQ link or control the RRU amplifier to turn on. The method of claim 1, wherein the reset event comprises a BBU system reset or a RRU interface board reset or a product subsystem reset. The method of claim 2, wherein if the reset event is a BBU system reset, the BBU initiates a reset request to all RRUs to turn off all RRU power amplifiers by resetting all RRUs. The method according to claim 3, wherein the BBU receives the acknowledgment message of the RRU in response to the reset request, controls the peripheral board to be powered down, and starts the main control board reset. The method of claim 2, wherein, if the reset event is an RRU interface board reset, the BBU deletes the IQ link of the RRU corresponding to the RRU interface board. The method according to claim 5, wherein after the IQ link of the RRU is deleted, the BBU sends a notification message for resetting to the RRU interface board to reset the RRU interface board. The method of claim 2, wherein if the reset event is a product subsystem reset, the BBU deletes the cell on the RRU corresponding to the product subsystem and deletes the link of the RRU. The method of claim 7, wherein the BBU initiates a product-related board reset corresponding to the product subsystem after the IQ link of the RRU is deleted. A base station baseband unit for protecting a radio remote unit power amplifier, comprising:

The baseband unit BBU is configured to detect a user-initiated reset event in real time, and when the reset event is detected, delete the in-phase/quadrature phase link of the radio remote unit RRU or control the RRU power amplifier to be turned off, and after the reset event ends, Re-establish the IQ link of the RRU;

The radio remote unit RRU is set to turn off the RRU amplifier under the control of the BBU, and restart the RRU amplifier after the reset event ends. The system of claim 9, wherein the BBU comprises:

The human-computer interaction module is configured to detect a reset event in real time, and the reset event includes a BBU system reset or a RRU interface board reset or a product subsystem reset.