JP2009260652A - Radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication system which does not increase a traffic of a transmission bus, and further can obtain a fault history of a module. <P>SOLUTION: In a system or radio apparatus which can obtain fault history information for quickly solving a fault caused in a slave unit disposed in a remote place, etc. , a log file containing the fault history is dispersed to nodes for holding. Further, the log file about the node of a redundant structure is collected to one side for holding. Further, the collection is carried out based on a time stamp. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wireless communication system.

  For example, in a wireless communication system such as a mobile communication system, it is important to monitor a failure occurring in each component, save the history, and analyze it later.

  A conventional failure history acquisition method will be described with reference to FIG.

  FIG. 1 is a block diagram showing a configuration of a conventional wireless communication system.

  In FIG. 1, 1 is a slave unit of the wireless communication system, 11 is a first sector part of the slave unit 1, 111 is a first antenna of the first sector part 11, and 112 is a second sector part of the first sector part 11. , 12 is the second sector part of the slave unit 1, 121 is the first antenna of the second sector part 12, 122 is the second antenna of the second sector part 12, and 2 is the master of the wireless communication system Unit, 21 is an interface unit of master unit 2, 3 is a module of slave unit 1, 311 is a first module of first sector unit 11, 312 is a second module of first sector unit 11, and 321 is a first module The first module of the second sector section 12, 322 is the second module of the second sector section 12, 4 is the multiple processing section of the slave unit 1, and 41 is the first module Multiplexing unit of sector unit 11, 42 is a multiplexing unit of second sector unit 12, 5 is a common unit, 6 is a log file, 7 is a transmission bus, 81 is a signal transmission path of first sector unit 11, 82 Is a signal transmission path of the second sector section 12, 861 is an example of a path that transmits the signal transmission path 81 of the first sector section 11, and 862 is a path that transmits the signal transmission path 82 of the second sector section 12. For example, 91 is a first external unit, and 92 is a second external unit.

  As shown in FIG. 1, conventionally, the log file 6 as a failure history is included in the common unit 5, and the memory included in each module 311, 312, 321, 322 can be reduced and acquired. The possible failure history information can be obtained as the same information regardless of the signal transmission paths 81 and 82.

  Patent Document 1 discloses an invention for copying data stored in an active memory to a standby memory in a memory device having an active system and a standby system.

JP 2006-243852 A

  The conventional example described above has the following problems.

  That is, in the configuration in which the common unit 5 has the log file 6 as a failure history as shown in FIG. 1, communication is enhanced, for example, the amount of data processing is increased, and only a single failure has occurred. With this information, it was difficult to analyze when a problem occurred. In other words, in future wireless communication systems, it is important to obtain information such as processing delays triggered by externally generated factors.

  To explain further, conventionally, the information in the log file 6 shown in FIG. 1 is transmitted after being controlled after being controlled with a communication protocol such as a handshake in order to communicate with each module 311, 312, 321, 322 without collision. Since the communication traffic on the bus 7 increases and a transmission bus band corresponding to the capacity of the log file 6 itself is necessary, the bandwidth of the transmission bus 7 is secured and the processing capacity of the module 3 is under pressure.

  Conventionally, since the contents of the log file 6 contain only failures and state changes that occur in the common unit 5, the history of failures and state changes such as processing delays that have occurred in the module 6 cannot be saved. Further, even if a failure such as a processing delay or a change in state caused in the module 6 can be transmitted through the transmission bus 7 and stored as a failure history, the communication traffic on the transmission bus 7 is increased and the processing delay of the module 6 is further promoted. It was.

  The first problem in the conventional wireless communication system is that the obtained fault history information is only result information and no further information.

  In addition, the second problem in the conventional wireless communication system is that the common unit, that is, the memory means in the common part has a wide transmission bus bandwidth in the slave unit, and the signal processing capability of the module can be reduced. It is to have sex.

  Patent Document 1 discloses an invention for copying data stored in an operational memory to a standby memory, but it does not solve the above-described problem in transmission of a failure history.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a wireless communication system capable of acquiring a module failure history without increasing traffic on a transmission bus.

  The present invention relates to a system and a wireless device capable of acquiring failure history information for quickly solving a failure that has occurred in a slave unit (slave unit) arranged in a remote place.

  In order to solve the above problems, the present invention is characterized in that log files containing failure histories are distributed and held among nodes.

  Further, the present invention is characterized in that log files for nodes in a redundant configuration are collected and held on one side.

  Further, the present invention is characterized in that the aggregation is performed based on a time stamp.

  According to the present invention, the following effects can be obtained.

  The first effect is that the bandwidth of the transmission bus can be reduced because the log file is processed by each module.

  The second effect is that since the log file is processed by each module, a failure history such as a module processing delay can be newly acquired, and the value of the failure history information can be increased.

  The third effect is that the log file can be reduced in size because it is possible to compress probable information by communication between modules in the comparison of log files.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The present invention provides a method for efficiently transferring failure history information necessary for more failure analysis in a failure history transfer method used in a wireless communication system.

  The present invention has a configuration in which the log file 6 mounted in the common unit 5 is accommodated in each of the modules 311, 312, 321, and 322 with respect to the components shown in FIG. It is possible to store new information such as processing time for the module 3 to process using the information.

  Further, inter-module communication lines 331 and 332 are added, and the inter-module communication means 331 and 332 have communication paths and means for comparing log files stored in the respective modules 311, 312, 321 and 322. . Utilizing the inter-module communication means 331 and 332, for example, it has an arithmetic processing for performing control for optimizing duplication information with information between the log files 611-612 and between the log files 621-622.

  FIG. 2 is a block diagram showing a configuration of an embodiment of a wireless communication system according to the present invention.

  In FIG. 2, 1 is a slave unit of the wireless communication system, 11 is a first sector portion of the slave unit 1, 111 is a first antenna of the first sector portion 11, and 112 is a second sector of the first sector portion 11. , 12 is the second sector part of the slave unit 1, 121 is the first antenna of the second sector part 12, 122 is the second antenna of the second sector part 12, and 2 is the master of the wireless communication system Unit, 21 is an interface unit of master unit 2, 3 is a module of slave unit 1, 311 is a first module of first sector unit 11, 312 is a second module of first sector unit 11, and 321 is a first module The first module of the second sector section 12, 322 is the second module of the second sector section 12, 331 is the first inter-module communication means, and 332 is the first module. 4 is a multiprocessing unit of the slave unit 1, 41 is a multiprocessing unit of the first sector unit 11, 42 is a multiprocessing unit of the second sector unit 12, 5 is a common unit, and 611 is a first unit. The log file of the first module 311 of the first sector part 11, the log file of the second module 312 of the first sector part 11, the log file 621 of the first module 321 of the second sector part 12. , 622 is a log file of the second module 322 of the second sector section 12, 7 is a transmission bus, 81 is a signal transmission path of the first sector section 11, 82 is a signal transmission path of the second sector section 12, 863 is an example of a path for transmitting the signal transmission path 81 of the first sector section 11 of the present invention, 864 is an example of a path of transmitting the signal transmission path 82 of the second sector section 12 of the present invention, and 91 is a first path. External unit, 92 is a second external unit.

  In FIG. 2, the slave unit 1 accommodates a plurality of modules 3 (modules 311, 312, 321, and 322) that transmit and receive radio signals that are arranged at remote locations and the like. It is a unit that has wiring and an interface in advance for transferring the signal.

  The slave unit 1 accommodates the number of modules corresponding to a rearrangement unit (referred to as a sector) such as an antenna group (antennas 111, 112, 121, 122, etc.) oriented in an arbitrary direction.

  The module 3 is accommodated corresponding to the sector, and is a wireless module in which transmission / reception and signal processing of radio signals and the like are mounted, modulation / demodulation signal processing represented by CPU, ROM, RAM, FPGA, DSP, control / software arithmetic processing, etc. It is a structural unit that is executed by means of

  The module 3 is mounted with the number of terminal devices such as antennas corresponding to the sector portions 11 and 12, for example, two antennas per sector in the case of the antenna diversity system.

  FIG. 2 shows an example of two sector parts (first sector part 11 and second sector part 12) as an example in which a plurality of antennas 111, 112, 121, and 122 are connected.

  Further, the module 3 constituting the sector portions 11 and 12 may be usually configured as a redundant system in which a plurality of units are mounted in order to avoid sector disconnection due to a failure or the like. In FIG. 2, a redundant configuration in which two modules are operated in parallel is shown as an example.

  The common unit 5 is mounted on the slave unit 1 and has a function of aggregating information such as alarm signals input from one or a plurality of external devices (eg, the external unit 91 and the external unit 92) and transferring the information to each module 3. Have.

  The common unit 5 and the module 3 are connected by a transmission bus 7 and communicate with each other.

  The module of the sector unit having the redundant system transmits the information to the multiprocessing unit 4 having an interface for transmitting information to the master unit 2.

  The multiplex processing unit 4 has a function of selectively transmitting / receiving information transferred from the module 3 or multiplexing / separating information transmitted / received to the master unit 1 according to the requirement of data.

  The multiplex processing unit 4 multiplexes, demultiplexes and synthesizes signals to the modules 311, 312, 321, and 322 that are included in the sector units 11 and 12. The case may be omitted. The multiplex processing unit 41 of the sector unit 11 is connected to the interface unit 21 of the master unit 2 via the signal transmission path 81, and the multiplex processing unit 42 of the sector unit 12 is connected to the interface unit 21 of the master unit 2 via the signal transmission path 82. Connecting.

  The master unit 2 controls the slave unit 1 and converts a signal transmitted from the public network or the like into a radio signal via one or a plurality of signal transmission lines, such as the signal transmission lines 81 and 82 in FIG. It has a function of performing transmission / reception with the slave unit 1 by reconstructing into a convertible signal format. FIG. 2 shows an example in which communication is performed on signal transmission paths (signal transmission path 81 and signal transmission path 82) connected to the slave unit 1 via signal transmission paths 81 and 82 and corresponding to the number of sectors.

  In the signal transmission paths 81 and 82, information on a main carrier unit that stores information for generating a radio signal and information on a subcarrier unit that is used to control the slave unit 1 and transfer information from the slave unit are specified signals. It is transmitted in a format based on the format.

  The interface unit 21 has a function of communicating with the multiplex processing unit 4 of the slave unit 1, and has a function of distributing a signal from the public transmission line network or the like to the sector units 11, 12 or distributing / combining the signals.

  Usually, the master unit 2 is installed on an indoor floor such as a station building, and the slave unit 1, the external units 91 and 92, and the antennas 111, 112, 121, and 122 are installed outdoors or in an area different from the master unit 2. There are many cases. The signal transmission paths 81 and 82 are often configured by an optical fiber network or an indoor wiring path.

  The log file is a logical file that stores faults that have occurred in the internal communication processing in the slave unit 1. By downloading and analyzing the log file via the master unit 2, it is possible to use it for analysis of troubles related to communication in the slave unit 1 which is usually difficult to analyze.

  The information stored in the log file is useful for failure analysis by accumulating a large number of communications and state changes from all nodes.

  However, since the subcarrier transmission band allowed for the signal format in the signal transmission paths 81 and 82 connecting the master unit 2 and the slave unit 1 is finite, the smaller the log file capacity, the more linear the maintenance monitoring control. And stable signal transmission between the master unit 2 and the slave unit 1 without squeezing the processing capacity of the CPU or the like for signal processing of signals that should be originally transmitted such as voice communication or data communication processed by the module 3 Is preferable.

  Therefore, in the present invention, in order to increase the amount of information accommodated in the log files 611, 612, 621, and 622 shown in FIG. 611, 612, 621, and 622 were accommodated, and inter-module communication lines 331 and 332 were added. In addition to the effect of storing new information such as the processing time for the module 3 to process information provided from the common unit 5, effective information can be obtained by performing control for optimizing duplicate information by inter-module communication 331 and 332. By storing only in the log files 611, 612, 621, and 622, there is an effect of preventing enlargement of the log file.

  In the present invention, the processing time for the module 3 to process the information provided from the common unit 5 by accommodating the log file 6 mounted in the conventional common unit 5 in each module 3 with respect to the components shown in FIG. Such as new information can be stored. In addition, communication paths and means are provided that allow the inter-module communication lines 331 and 332 to be added and the log files stored in the inter-module communication means 331 and 332 to be compared with each other. Utilizing the inter-module communication means 331 and 332, for example, it has an arithmetic processing for performing control for optimizing duplication information with information between the log files 611-612 and between the log files 621-622.

  An example of a procedure for improving the efficiency of failure history information optimized by the configuration of the present embodiment will be described with reference to FIGS. 3, 4, and 5.

  FIG. 3 is a diagram showing an example of the log file 6 in the prior art shown in FIG.

  4 is a diagram showing an example of log files 611 and 612 according to the embodiment shown in FIG. 2 when the same event as in FIG. 3 occurs.

  FIG. 5 is a diagram showing a new log file obtained by integrating the log files 611 and 612 shown in FIG.

  The processing of accumulating the log files 611 and 612 and the aggregated new log file according to the present embodiment is performed by control / software arithmetic processing means represented by CPU, ROM, RAM, FPGA, DSP, etc. mounted in the module 3. It can be realized by software processing. Since the control logic and device usage / operation are well known to those skilled in the art and are not related to the contents of the present invention, they will be omitted and will be described in accordance with a logic processing procedure capable of performing software operations.

  The information stored in the log file 6 shown in FIG. 3 will be described using the configuration of the sector unit 11 as an example.

  In this prior art, the modules 311 and 312 transfer the time information or the synchronization signal extracted from the signal transmission path 81 to the common unit 5 through the transmission bus 7 in order to increase the usefulness of the failure log.

  The common unit 5 has time information for recording the occurrence time or timing of the failure history. The method for extracting the time information is well known to those skilled in the art and is not related to the contents of the present invention, so that the description thereof is omitted.

  The common unit 5 stores the occurrence events in the memory at the same time as the obtained time information, and forms a log file 6. Events (i), (ii), (iii), (iv), and (v) are shown in FIG. Each event is recorded in a memory together with a time stamp obtained from time information.

  Referring to FIG. 3, it can be seen that five events are obtained with time stamps. It can be seen that the file size = information amount of the log file 6 at this time is “5” except for the time stamp information. At this time, the amount of information is five, which is a small amount of information, but it can be determined that the amount of information as a failure history is small only by occurrence of an event.

  The information stored in the log files 611 and 612 shown in FIG. 4 will be described using the configuration of the sector unit 11 as an example. In this embodiment, the log files 611 and 612 are directly created without creating the log file 6 of the common unit 5.

  4 shows a state in which each of the events that have occurred in the sector section 11 having the configuration shown in FIG. 2 is recorded in the log files 611 and 612 in the same manner as in FIG. Events shown in dashes in events (i), (ii), (iii), (iv), and (v) have the same event trigger but different memory locations, that is, separately in log files 611 and 612 Indicates a recorded event.

  Each generated log file is transferred, organized on the time stamp, and compared, that is, referring to the column “Information that can be estimated from both log files” in FIG. 4, the difference in processing time and delay processed by each module Can be extracted by analyzing the failure history after downloading the log files 611 and 612 via the master unit 2, and it can be seen that the usefulness as the failure history is increasing. It can be determined that there is a high possibility of occurrence of a problem due to a stagnation due to a factor in the processing inside the module 312 compared to the module 311.

  However, in the information as it is, since the file size is 5 (log file 611) +5 (log file 612), the transmission information amount is enlarged.

  Therefore, in the present invention, the file size is reduced by organizing the events shown in FIG.

  FIG. 5 shows the structure of a log file obtained by processing the event occurring in the description of FIG. 3 according to the structure of the present invention of FIG.

  The obtained log files 611 and 612 are stored in a memory at an arbitrary timing and transferred to a module facing each other by inter-module communication 331. As a result, the information of both the log files 611 and 612 is aggregated into either the log file 611 or 612, and this is used as a new log file. Here, a case where information from time 00:01 to 00:07 is collectively processed is shown. The following information processing may be performed by each module.

  For the event with the time stamp 00:01, both modules occur and are processed at the same time, so it is considered that there is only one piece of information obtained as a failure history. Therefore, the event (i) is recorded as a new log file.

  Next, the event (ii) generated / processed at 00:02 is generated / processed at 00:03 in the module 312, so that it can be determined that some processing delay has occurred in the module 312. For this reason, both events are recorded as events for the event (ii). The same applies hereinafter.

  By discarding and recording information on one of the likely duplicate events, the file size can be reduced from the state of 5 + 5 = 10 to 7, and the improvement in the value of information as a failure history can be reduced to the file size. Increase can be minimized.

  The newly generated new log file is rewritten as a new log file of each module as updated information, and the file is uploaded to the master unit 2 via the signal transmission path 81 at the request of the interface unit 21. .

  Further, compared with the configuration of FIG. 2, the log file and time information transferred on the transmission bus 7 are not necessary, so that the transmission band of the transmission bus 7 can be reduced.

  As described above, the present invention has the following effects.

  The first effect is that the log file is processed by each module, so that the bandwidth of the transmission bus 7 can be reduced.

  The second effect is that since the log file is processed by each module, it is possible to newly acquire a failure history such as a processing delay of the module, thereby increasing the value of the failure history information.

  A third effect is that the log file can be reduced in size because it is possible to compress the information that is more reliable by communication between the modules.

  As another embodiment of the present invention, the basic configuration is the same as that shown in FIG. 2, but the operation performed between modules in the sector is expanded and used in the master unit 2 to improve the value of failure history information. The effect of can be further enhanced.

  In the present invention, the log file is not limited to being stored in the module, and any log file may be stored in a node on the communication path.

  According to the present invention, the capacity of a log file containing a failure history can be optimized.

  In addition, according to the present invention, the storage of failure history is distributed to nodes such as modules, so that differences in the ability of each module to perform signal processing are used to record information that may become a new failure factor. To increase the value of failure history.

It is a block diagram which shows the structure of the conventional radio | wireless communications system. It is a block diagram which shows the structure of one Embodiment of the radio | wireless communications system by this invention. It is a figure which shows an example of the log file 6 in the prior art shown in FIG. FIG. 6 is a diagram showing an example of log files 611 and 612 according to the embodiment shown in FIG. 2 when the same event as in FIG. 3 occurs. FIG. 6 is a diagram showing a new log file in which the log files 611 and 612 shown in FIG. 4 are aggregated.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slave unit 11 1st sector part 111 1st antenna of 1st sector part 112 2nd antenna of 1st sector part 12 2nd sector part 121 1st antenna of 2nd sector part 122 1st Second antenna of the second sector part 2 Master unit 21 Interface unit 3 Module 311 First module of the first sector part 312 Second module of the first sector part 321 First module of the second sector part 322 Second module in the second sector section 331 First inter-module communication means 332 Second inter-module communication means 4 Multi-processing section 41 Multi-processing section in the first sector section 42 Multi-processing in the second sector section Section 5 Common unit 6 Log file 611 Log file 612 of the first module in the first sector section 612 First section Log file of the second module of the data unit 621 Log file of the first module of the second sector part 622 Log file of the second module of the second sector part 7 Transmission bus 81 Signal transmission of the first sector part Path 82 Signal transmission path of second sector section 861 Example of path transmitting signal transmission path of first sector section 862 Example of path transmitting signal transmission path of second sector section 863 First of the present invention Example of path for transmitting signal transmission path of sector part 864 Example of path for transmitting signal transmission path of second sector part of the present invention 91 First external unit 92 Second external unit

Claims (6)

  A wireless communication system characterized in that log files containing failure histories are distributed and held among nodes.   2. The wireless communication system according to claim 1, wherein log files for redundant nodes are gathered and held in one side.   The wireless communication system according to claim 2, wherein the aggregation is performed based on a time stamp.   A log file holding method for a wireless communication system, wherein log files containing failure histories are distributed and held among nodes.   5. The log file holding method for a wireless communication system according to claim 4, wherein log files for nodes in a redundant configuration are collected and held on one side.   6. The log file holding method for a wireless communication system according to claim 5, wherein the aggregation is performed based on a time stamp.

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