CN101166321B - Software upgrade method of remote radio frequency unit in wireless communication system - Google Patents

Abstract

The invention discloses a method for upgrading software of a remote radio frequency unit in a wireless communication system, relates to a method for upgrading software in a wireless communication system, and is invented to ensure reliable, stable and rapid upgrading of RRU. The invention includes: (1) the remote radio frequency unit loads the current version of the optical interface module software, and reports the version number of the software; (2) the baseband pool unit judges whether the optical interface module software needs to be upgraded, and if it needs to be upgraded, the remote The end radio frequency unit downloads the new version of the optical interface module software from the baseband pool unit, and loads and runs it after saving it to the built-in memory; if no upgrade is required, the step ends; (3) the remote radio frequency unit detects the communication link on the optical interface Whether it is normal, if normal, the upgrade is successful, if not normal, reset the remote radio frequency unit and load the old version of the optical interface module software. The invention reduces the increase of network traffic caused by multiple RRUs obtaining optical interface module software from the BBU at the same time.

Description

Software upgrade method of remote radio frequency unit in wireless communication system

technical field

The invention relates to a software upgrading method in a wireless communication system, in particular to a software upgrading method of a remote radio frequency unit in a wireless communication system.

Background technique

The development trend of the wireless communication system architecture is to separate the radio frequency unit from the baseband control unit, and connect the two through long-distance transmission means (optical fiber or cable), so that the radio frequency unit can be placed in various places where needed. The advantage of this architecture is that the entire system is divided into two relatively independent parts for independent development, and multiple radio frequency units share a baseband control unit. This not only reduces the cost, but also improves the flexibility of networking and network coverage, and facilitates engineering installation.

Here, the two divided parts are respectively referred to as a baseband pool unit (BBU) and a remote radio unit (RRU). RRU networking methods are various, such as chain networking, ring networking, star networking, etc., so whether each RRU works normally will affect all the units connected to it.

The maintenance of communication equipment (including software upgrade) is an important part of the whole system. As for the RRU, because it is generally located in a difficult location, its maintenance is usually performed through the near-end BBU, so the maintenance is more difficult. Then, how to ensure that the RRU can be upgraded reliably, stably, and quickly is an important technology faced by various remote devices.

Contents of the invention

In order to solve the defects and deficiencies in the prior art, the purpose of the present invention is to provide a method for upgrading the software of the remote radio frequency unit in the wireless communication system, so as to ensure that the RRU can be upgraded reliably, stably and quickly.

To achieve the above-mentioned purpose of the invention, the present invention is achieved in that:

A method for upgrading software of a remote radio frequency unit in a wireless communication system, comprising:

(1) The remote radio frequency unit loads the optical interface module software of the current version on the built-in memory, and reports the software version number of this optical interface module software to the baseband pool unit when it is determined that the software needs to be upgraded by the preset software upgrade sign;

(2) The baseband pool unit judges whether the optical interface module software needs to be upgraded according to the software version number of the optical interface module software reported by the remote radio frequency unit. If the optical interface module software needs to be upgraded, the remote radio frequency unit downloads it from the baseband pool unit. The new version of the optical interface module software, and load and run after saving to the built-in memory; if there is no need to upgrade, the step ends;

(3) The remote radio frequency unit detects whether the communication link on the optical interface is normal. If normal, the optical interface module software upgrade is successful. If not, the remote radio frequency unit resets and loads the old version of the optical interface module software.

Further, the step (1) is specifically:

(11) Run the startup program after the remote radio frequency unit is powered on, and load the current optical interface module software from the built-in memory;

(12) After the communication link between the remote radio unit and the baseband pool unit is established, the remote radio unit obtains high-level software from the baseband pool unit and loads it into operation;

(13) The remote radio frequency unit judges the upgrade flag of the optical interface module software. If the upgrade flag is an upgrade state, it will report the alarm and then change the upgrade flag to a normal state and then end; if the upgrade flag is a normal state, the far-end radio frequency The unit reports the software version number of the optical interface module to the baseband pool unit.

Compared with the prior art, the present invention realizes the reliable, stable and rapid upgrade of RRU, reduces the increase of network traffic caused by multiple RRUs obtaining optical interface module software from BBU at the same time, and ensures that the optical interface module software of RRU is upgraded In the event of a problem, the software automatically rolls back without affecting the work of the next-level RRU.

Description of drawings

Fig. 1 is a flow chart of the present invention.

Figure 2 is the loading process of the optical interface module in the RRU startup program.

Figure 3 is the loading process of the optical interface module in the RRU high-level software.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The invention is mainly applied to the upgrading of remote base stations. Usually, it is the optical interface module on the RRU to ensure reliable communication between the current level and the next level RRU and the BBU through the optical fiber. The optical interface module software is usually relatively large, and multiple RRUs may start at the same time, so if the RRUs all request software from the BBU after startup, the network may be busy and the BBU load will increase. Therefore, the optical interface module is placed on the built-in memory of the RRU. , get new version software from BBU only when upgrade is needed.

Store a text file, such as RruSwVer.ini, on the memory of the RRU. The upgrade status of the optical interface module software can be placed in the file for reading and writing by the high-level software and startup software. For example, the upgrade flags for each of these software can be defined as follows:

typedef struct tagOamCfgParamStruc

{

  OSS_CHAR szName[20]; /*software name*/

OSS_CHAR szFlag ; /*'='*/

OSS_CHAR szValue ; /*'0' means normal state; '1' means upgraded state*/

OSS_CHAR szEnd ; /*'\n'*/

}TOamCfgParam, *PTOamCfgParam;

Fig. 1 is a flow chart of the present invention. As shown in Figure 1, the present invention comprises the following steps:

(a) The RRU loads the current version of the optical interface module software on the built-in memory, and then waits for the communication with the BBU to be normal.

(b) The RRU reports the software version number of the optical interface module to the BBU; the BBU judges whether the software of the optical interface module needs to be upgraded according to the reported version number and notifies the RRU.

(c) If the optical interface module software needs to be upgraded, the RRU obtains the software from the BBU; otherwise, skip the following software upgrade steps and directly enter the subsequent startup process.

(d) The RRU saves the obtained software as a temporary version on the memory and loads it for operation.

(e) If the optical interface module software fails to run, the RRU resets and loads the old software to implement software rollback.

Figure 2 is the loading process of the optical interface module in the RRU startup program. Figure 3 is the loading process of the optical interface module in the RRU high-level software. The RRU can be divided into CPU software and optical module software. The two module software run on different hardware, and the reset of one does not affect the work of the other. As shown in Figure 2 and Figure 3, as follows:

(i) After the RRU is powered on, the start-up program is first run, and the start-up program is responsible for loading the current optical interface module software from the memory.

(ii) After the communication link between the RRU and the BBU is established, the high-level software (CPU software) is obtained from the BBU and loaded for operation.

(iii) After the high-level software runs, judge the optical interface module software upgrade flag, if the upgrade flag is an upgrade state, then report an alarm, then change the flag to a normal state and skip the subsequent software upgrade process.

(iv) The RRU high-level software reports the software version number of the optical interface module to the BBU; the BBU judges whether the software of the optical interface module needs to be upgraded according to the reported version number and notifies the RRU.

(v) If the optical interface module software needs to be upgraded, the RRU obtains the software from the BBU and saves it to the memory as a temporary version, and then first sets the corresponding software download flag as an upgrade state, and then loads and runs the new version of the optical interface module software.

(vi) The RRU high-level software detects whether the optical fiber link is normal. If the communication link on the optical fiber is abnormal within 30 times, it is considered that the software of the optical interface module has failed, and the RRU restarts; otherwise, it is considered that the software upgrade is successful, and the follow-up work is continued.

Claims (2)

1. The method for upgrading the software of the remote radio frequency unit in the wireless communication system is characterized in that: comprising, (1) The remote radio frequency unit loads the optical interface module software of the current version on the built-in memory, and reports the software version number of this optical interface module software to the baseband pool unit when it is determined that the software needs to be upgraded by the preset software upgrade sign; (2) The baseband pool unit judges whether the optical interface module software needs to be upgraded according to the software version number of the optical interface module software reported by the remote radio frequency unit. If it needs to be upgraded, the remote radio frequency unit downloads a new version of the optical interface from the baseband pool unit Module software, and load and run after saving to the built-in memory; if there is no need to upgrade, the steps end; (3) The remote radio frequency unit detects whether the communication link on the optical interface is normal. If normal, the optical interface module software upgrade is successful. If not, the remote radio frequency unit resets and loads the old version of the optical interface module software. 2. The method for upgrading the software of the remote radio frequency unit in the wireless communication system according to claim 1, characterized in that: said step (1) is specifically: (11) Run the startup program after the remote radio frequency unit is powered on, and load the current optical interface module software from the built-in memory; (12) After the communication link between the remote radio unit and the baseband pool unit is established, the remote radio unit obtains high-level software from the baseband pool unit and loads it into operation; (13) The remote radio frequency unit judges the upgrade flag of the optical interface module software. If the upgrade flag is an upgrade state, it will report the alarm and then change the upgrade flag to a normal state and then end; if the upgrade flag is a normal state, the far-end radio frequency The unit reports the software version number of the optical interface module to the baseband pool unit.

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