JP2001177446A - Communication controller and communication changeover control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication controller and a communication changeover control method that can simplify hardware control in duplicate changeover control and restart control by duplicate changeover in an active/standby configuration, reduce a duplicate changeover processing time and enhance the communication capability. SOLUTION: On the occurrence of a call recovery due to failure occurrence at a signal processing section 123, a communication control section 122 in a standby system is provided with a call recovery object table and a call interruption object table, and on the occurrence of duplicate changeover due to a failure in a communication control section 121 during the call recovery processing, the call recovery processing is continued to make information coincident. In the case that a failure takes place in the signal processing section 123 during duplicate changeover processing due to the failure occurrence in the signal processing section 121, a communication control section 122 of a new active system is provided with a call recovery object table and a call interruption object table so as to continue the call recovery processing, thereby making the information coincident.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication control device such as a radio base station device, a radio network control device, a multimedia signal processing device and the like in a mobile communication system and a communication switching control method, and more particularly, to a communication in a working / standby configuration. Control unit and N + 1 configuration (N operating systems + 1 standby system)
Alternatively, the present invention relates to a communication control apparatus and a communication switching control method including a signal processing unit having a 0/1 configuration (N operation systems).

[0002]

2. Description of the Related Art Conventionally, as this kind of communication control apparatus and communication switching control method, there is one disclosed in JP-A-9-171441.

Conventionally, when data communication such as voice and packet is performed by a communication control device such as a radio base station device in a mobile communication system, a control function unit for controlling the entire communication control device and a data signal such as voice and packet are transmitted. And a signal processing function unit for performing the processing. Since the signal processing function unit is required to have high reliability, the communication control unit that manages call control information and hardware resources in the signal processing function unit has a dual working / standby configuration, and a signal processing unit that performs signal processing. Is a working / spare N + 1 configuration or a full operation 0/1 configuration. In the case of a failure of the active system in the redundant configuration, the standby system is used.

The communication control unit manages and controls call control information necessary for setting and releasing the data communication path and hardware resources in the signal processing unit. It is necessary to share management information between departments. In order to realize this, conventionally, a configuration is employed in which information managed between the active system and the standby system is matched by providing a shared memory that can be written from the active system and readable from the active system / standby system. I have.

[0005] Further, when an abnormality causing a duplex switching of the communication control unit and an abnormality causing a call recall of the signal processing unit occur at the same time, there is a possibility that information mismatch will occur. , The information of the communication control unit and the information of the signal processing unit are matched.

[0006]

However, the conventional communication control device has a problem that hardware control is complicated due to the realization of the shared memory of the communication control unit. In addition, at the time of duplex switching of the communication control unit, it is necessary to perform information collation processing between the communication control unit and the signal processing unit, and there is a problem that the duplex switching processing time becomes longer and the communication processing capability is reduced.

The present invention has been made in view of the above points, and simplifies the hardware control in the duplex switching control in the active / standby configuration and the resumption control by the duplex switching, shortens the duplex switching processing time, and reduces the communication time. It is an object of the present invention to provide a communication control device and a communication switching control method capable of improving the capability.

[0008]

The communication control device of the present invention employs a configuration of N active systems and one standby system, employs a signal processing unit for processing signals, and an active / standby configuration. When detecting a failure of the signal processing unit, a communication control unit that holds call information for recalling to a communication control unit of a standby system or a communication control unit of a new active system during restart control after duplex switching. Are adopted.

[0009] According to this configuration, when an abnormality that causes a duplex switching of the communication control unit and an abnormality that causes a call recall of the signal processing unit occur simultaneously, the call information for call recall is generated based on the call information for call recall. Therefore, since it is not necessary to perform the information collation processing as in the related art, it is possible to shorten the duplex switching processing time and improve the communication capability.

Further, the communication control device of the present invention employs a configuration of all N operating systems, employs a signal processing unit for processing signals, and employs an operation / standby configuration to detect a failure of the signal processing unit in operation. In such a case, a communication control unit for holding call information for recalling to the communication control unit of the standby system or the communication control unit of the newly active system that is performing restart control after duplex switching is adopted.

[0011] According to this configuration, when an abnormality that causes a duplex switching of the communication control unit and an abnormality that causes a recall of the signal processing unit occur at the same time, the call information for the recall is determined based on the call information for the recall. Therefore, since it is not necessary to perform the information collation processing as in the related art, it is possible to shorten the duplex switching processing time and improve the communication capability.

Further, in the communication control device according to the present invention, in the above-mentioned communication control device, when the operating communication control unit detects an abnormality of the operating signal processing unit, a result of calculating an available resource in the signal processing unit is determined. Are classified into calls that can be recalled and calls that cannot be recalled, and the communication control unit of the standby system stores them as a call reassignment target table and a call disconnection target table, respectively.

According to this configuration, information matching between the communication control unit and the signal processing unit can be easily performed without performing the information matching process.

Further, in the communication control device according to the present invention, in the communication control device described above, the communication control unit of the newly operating system during the restart control after the duplex switching is set to a signal processing unit in an abnormal state. Is detected, the call is classified into a call reassignable call and a call non-recallable according to the calculation result of the available resources in the signal processing unit, and is held as a call reassignment target table and a call disconnection target table, respectively.

According to this configuration, the information matching between the communication control unit and the signal processing unit can be easily performed without performing the information matching process.

In the communication control apparatus according to the present invention, in the above-mentioned communication control apparatus, the communication control unit of the newly operating system during the restart control after the duplexing switch performs the call recall processing for the call on the call recall target table. Execute to match its own information with the information of the signal processing unit in the normal state.

According to this configuration, it is possible to shorten the information matching processing between the communication control unit and the signal processing unit after the duplex switching, shorten the duplex switching processing time, and improve the communication capability.

Further, in the communication control device according to the present invention, the communication control unit of the newly operating system, which is performing the restart control after the duplexing switch, executes a call disconnection process for the call on the call disconnection target table. To match the information of its own with the information of the signal processing unit in the normal state.

According to this configuration, it is possible to shorten the information matching process between the communication control unit and the signal processing unit after the duplex switching, shorten the duplex switching process time, and improve the communication capability.

[0020] In the communication control apparatus according to the present invention, the communication control unit of the newly operating system, which is in the restart control after the duplexing switch, performs signal processing in which the call on the call recall target table is in a normal state. The completion of the call reassignment process is detected by the setting in the section.

According to this configuration, it is possible to shorten the information matching process between the communication control unit and the signal processing unit after the duplex switching, shorten the duplex switching process time, and improve the communication capability.

A radio base station apparatus according to the present invention employs a configuration including the communication control device.

According to this configuration, in the radio base station apparatus, the same operation and effect as those of the communication control apparatus can be obtained.

The wireless network control device of the present invention employs a configuration including the communication control device.

According to this configuration, in the wireless network control device, it is possible to obtain the same operation and effects as those of the communication control device.

The multimedia signal processing apparatus according to the present invention comprises:
A configuration including the communication control device is adopted.

According to this configuration, in the multimedia signal processing device, the same operation and effect as those of the communication control device can be obtained.

According to the communication switching control method of the present invention, when an abnormality is detected in a signal processing unit in a communication control unit of an active system,
The standby communication control unit is notified at the beginning of the call reassignment process, and the standby communication control unit manages the call information for call reassignment.

According to this method, when an abnormality that causes a duplex switching of the communication control unit and an abnormality that causes a recall of the signal processing unit occur at the same time, the call information for the recall is generated based on the call information for the recall. Therefore, it is not necessary to perform the information collation processing as in the related art, and it is possible to shorten the duplex switching processing time and improve the communication capability.

Further, the communication switching control method of the present invention detects that a call is set to the signal processing unit in an abnormal state in the communication control unit of the newly operating system during the restart control after the duplex switching, and calls the call. It is managed as call information for replacement.

According to this method, when an abnormality that causes a duplex switching of the communication control unit and an abnormality that causes a call recall of the signal processing unit occur at the same time, the call information for call recall is generated based on the call information for call recall. Therefore, it is not necessary to perform the information collation processing as in the related art, and it is possible to shorten the duplex switching processing time and improve the communication capability.

In the communication switching control method according to the present invention, the call reassignment is performed based on the call information for the call reassignment managed in advance by the communication control unit of the newly operating system during the restart control after the duplex switching. I made it run.

According to this method, the information matching between the communication control unit and the signal processing unit can be easily performed without performing the information matching process.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The main point of the present invention is that when a call change occurs due to a failure in a signal processing unit, a call change target table and a call disconnection target table are provided in a standby communication control unit, and the call change processing is performed. When duplex switching due to a failure in the communication control unit occurs during the process, the call reassignment process is immediately continued to perform a process of matching information.

Further, when a failure occurs in the signal processing unit during the duplex switching process due to the occurrence of an abnormality in the communication processing unit, the call control change target table and the call disconnection target table are provided in the new active communication control unit. Then, the call reassignment process is promptly continued to perform the process of matching the information.

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

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of a communication control apparatus according to Embodiment 1 of the present invention. In the communication control device according to the first embodiment, the signal processing unit has an N + 1 configuration.

In this figure, the communication control device 100
For example, it is a wireless base station device in a mobile communication system, and includes a control function unit 110 and a signal processing function unit 120. The control function unit 110 is a central control unit, and the signal processing function unit 120 is a wireless transmission / reception unit. The control function unit 110 and the signal processing function unit 120 are connected to each other via a control / data highway 111.

Similarly, if the communication control device 100 is a wireless network control device, the signal processing function unit 120
Denotes a diversity handover unit, and the communication device 100
Is a multimedia signal processing device, the signal processing function unit 120 is a signal processing unit for audio, packets, images, and the like. In addition, as a communication device, a device in a station on a switching network side connected to a mobile communication system or the like is applicable, and can be widely applied to other devices that perform communication.

The signal processing function unit 120 includes a communication control unit that manages call control information and hardware resources in the signal processing function unit, and a signal processing unit that performs signal processing. The communication control unit has a communication control unit N having the same function.
A dual operation / standby configuration of the communication control unit 121 and the communication control unit E122 is adopted. The communication control unit N121 and the communication control unit E122
/ E control bus 126. At the time of the initial startup, the operation starts with the communication control unit N121 as the active system and the communication control unit E122 as the standby system. When a failure occurs in the communication control unit N121, duplex switching is performed, and the communication control unit N121 is switched to the standby system and the communication control unit E122.
Becomes the active system.

On the other hand, the signal processing unit of the signal processing function unit 120 includes a plurality of active signal processing units (active systems) 123-.
1,..., 123−N and one standby signal processing unit (standby system) 124 have an N + 1 configuration. The communication control unit and the signal processing unit are connected by a control bus 127 and a data bus 128. When a failure occurs in a certain signal processing unit (active system) 123, the signal processing unit (active system) 123
The connection that was set to the signal processing unit (standby system)
Call reassignment to 124 is performed.

Next, the communication control device 10 having the configuration shown in FIG.
0, a normal operation of performing call reassignment due to a failure in the signal processing unit will be described with reference to the sequence diagram of FIG. It is assumed that n + m communication paths have been set in advance between the communication control unit N121 and the signal processing unit (for example, the signal processing unit 123-1).

First, when the operating communication control unit N121 detects that a failure such as failure or non-mounting has occurred in a certain signal processing unit (operating system), it transmits a call reassignment instruction to the communication control unit E122. . At this time, the communication control unit N121
Calculates the number of connections that cannot be recalled in accordance with the availability of the signal processing unit (standby system) of the transfer destination. The communication control unit E that has received the call reassignment instruction adds connection IDs # 1, # 2,..., #N to be recalled to the call reassignment target table, and further adds the call disconnection to the call disconnection target table. , #M, which are connection IDs # 11, # 12,...
The call control response is transmitted to the communication control unit N121.

The communication control unit N1 which has received the call reassignment response
21 starts the call reassignment process. In the call reassignment process, the communication processing unit N121 transmits a connection setting instruction of the connection ID # 1 to the signal processing unit of the reassignment destination. Then, the signal processing unit having received the connection setting instruction sets the connection of connection ID # 1,
A connection setting response is transmitted to the communication control unit N121. As a result, a communication path of connection ID # 1 is set between the communication control unit N121 and the signal processing unit (standby system) of the transfer destination.

Next, the communication control unit N121 transmits a connection release instruction of the connection ID # 1 to the signal processing unit in an abnormal state. The signal processing unit that has received the connection release instruction releases the connection with the connection ID # 1, and transmits a connection release response to the communication control unit N121. Subsequently, connection ID # 2,
.., #N are subjected to the same processing.

Next, the communication control unit N121 starts a call disconnection process. The communication control unit N121 transmits a connection release instruction of the connection ID # 11 to the signal processing unit in the abnormal state. Then, the signal processing unit that has received the connection release instruction releases the connection of the connection ID # 11, and transmits a connection release response to the communication control unit N121. Continue connection ID # 1
Similar processing is performed for 2,..., #M. Finally, the communication control unit N121 transmits a call completion completion instruction to the communication control unit E122. The communication control unit E122 that has received the call recall completion instruction clears the call recall target table and the call disconnection target table, and transmits a call recall completion response to the communication control unit N121.

Next, the operation in the case where the duplex switching has occurred due to the failure of the communication control unit during the call reassignment processing due to the failure of the signal processing unit will be described with reference to the sequence diagram of FIG. However, the operation up to the call reassignment processing for the connection ID # 1 has already been described above, and thus will not be described.

It is assumed that a failure such as a failure or non-mounting has occurred in the communication control unit N121 during the call reassignment process completed up to the call reassignment process of the connection ID # 1. Communication control unit E
122 detects that the connection ID # 1 is set in the signal processing unit in the normal state, and deletes the connection ID # 1 from the call recall target table. Then, the communication control unit E122 refers to the call reassignment target table and recognizes a connection to be recalled. Then, a connection setting instruction of connection ID # 2 is transmitted to the signal processing unit in the normal state. The signal processing unit having received the connection setting instruction sets the connection of the connection ID # 2, and transmits a connection setting response to the communication control unit E122. As a result, the communication control unit E12
Connection between the signal processing unit 2 and the signal processing unit in the normal state
The communication path of D # 2 is set.

Next, the communication control unit E122 transmits a connection release instruction of the connection ID # 2 to the signal processing unit in an abnormal state. The signal processing unit that has received the connection release instruction releases the connection of the connection ID # 2, and transmits a connection release response to the communication control unit E122. The communication control unit E122 deletes the connection ID # 2 from the call reassignment target table. Then, the same processing is performed for the connection IDs # 3,..., #N.

Next, the communication control unit E122 refers to the call disconnection target table and recognizes a connection to be disconnected. Then, a connection release instruction of connection ID # 11 is transmitted to the signal processing unit in an abnormal state. The signal processing unit having received the connection release instruction,
The connection of the connection ID # 11 is released, and a connection release response is transmitted to the communication control unit E122. Upon receiving the connection release response for releasing the connection with the connection ID # 11, the communication control unit E122
The connection ID # 11 is deleted from the call disconnection target table. Thereafter, connection IDs # 12,.
Similar processing is performed for #m.

Next, the operation when a failure occurs in the signal processing unit during the duplex switching process due to a failure in the communication control unit will be described with reference to the sequence diagram of FIG.

It is assumed that a failure such as a failure or non-mounting occurs in the communication control unit N121, and a failure such as a failure or non-mounting occurs in the signal processing unit during execution of the duplex switching processing. In the restart control of the communication control unit E122 after the duplex switching process, the connection IDs # 1, # 2, ..., #n, # 11,
# 12,..., #M are detected. Next, connection IDs # 1, # 2,..., # That can be recalled from among the detected connections according to the number of available signal processing units (standby systems).
n is added to the call reassignment target table, and connection IDs # 11, # 12,...

Next, the communication control unit E122 refers to the call reassignment target table and recognizes a connection to be recalled. Then, a connection setting instruction of connection ID # 1 is transmitted to the signal processing unit in a normal state. The signal processing unit in the normal state that has received the connection setting instruction sets the connection with the connection ID # 1, and transmits a connection setting response to the communication control unit E122. As a result, a communication path of connection ID # 1 is set between the communication control unit E122 and the signal processing unit in a normal state.

Next, the communication control unit E122 transmits a connection release instruction of the connection ID # 1 to the signal processing unit in an abnormal state. The signal processing unit having received the connection release instruction releases the connection of the connection ID # 1, and transmits a connection release response to the communication control unit E122. When receiving the connection release response for releasing the connection of the connection ID # 1, the communication control unit E122 deletes the connection ID # 1 from the call reassignment target table. Then, the same processing is performed for the connection IDs # 12,..., #N.

Next, the communication control unit E122 refers to the call disconnection target table and recognizes a connection to be disconnected. The communication control unit E122 transmits a connection release instruction of the connection ID # 11 to the signal processing unit in the abnormal state. The signal processing unit in the abnormal state that has received the connection release instruction releases the connection with the connection ID # 11, and transmits a connection release response to the communication control unit E122. When receiving the connection release response for releasing the connection of the connection ID # 11, the communication control unit E122 deletes the connection ID # 11 from the call reassignment target table. Then, the same processing is performed for the connection IDs # 12,..., #M.

As described above, according to the first embodiment, in the standby communication control unit, by providing the call reassignment target table and the call disconnection target table, the duplex switching of the communication control unit and the signal processing unit Even when call recalls occur simultaneously, it is not necessary to use a shared memory, and hardware control can be simplified.

Further, by providing a call reassignment target table and a call disconnection target table in the standby communication control unit, it is possible to easily detect a connection that requires a call reassignment and a call disconnection at the time of resumption control by duplex switching. Therefore, it is not necessary to perform complicated and time-consuming information collation processing, and it is possible to reduce the time required for the duplex switching processing and improve the communication capability.

(Embodiment 2) FIG. 5 is a block diagram showing a configuration of a communication control apparatus according to Embodiment 2 of the present invention. In the communication control device according to the second embodiment, the signal processing unit has a 0/1 configuration (all operating system configuration). Note that, in this figure, parts other than a signal processing unit are the same as those described above, and description thereof will be omitted.

The signal processing function unit 160 is a 0/1 of the signal processing units 223-1,.
Take the configuration. When a failure occurs in a certain signal processing unit 223, call reassignment is performed to replace a connection set in the signal processing unit 223 with a vacant signal processing unit 223.

The normal operation of the communication control device 150 for performing call reassignment due to a failure of the signal processing unit is the same as that of the communication control device 100 of the first embodiment. That is,
Even when the signal processing unit has a 0/1 configuration, the call reassignment destination is the same except that it is distributed to all active systems instead of the standby system.

[0061]

As described above, according to the present invention,
It is possible to simplify the hardware control in the duplex switching control and the resumption control at the time of switching in the active / standby configuration, and to shorten the duplex switching processing time and improve the communication capability.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a communication control device according to a first embodiment of the present invention.

FIG. 2 is a sequence diagram for explaining an operation of the communication control device according to the first embodiment.

FIG. 3 is a sequence diagram illustrating an operation of the communication device according to the first embodiment.

FIG. 4 is a sequence diagram for explaining an operation of the communication device according to the first embodiment.

FIG. 5 is a block diagram showing a configuration of a communication control device according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 100, 150 Communication control device 110 Control function unit 111 Control / data highway 120, 160 Signal processing function unit 121 Communication control unit N 122 Communication control unit E 123-1 to 123 -N Signal processing unit (active system) 124 Signal processing unit (Spare system) 126 N / E control bus 127 Control bus 128 Data bus 223-1 to 223-N Signal processing unit

Claims (13)

[Claims] 1. A signal processing unit that employs N active systems and one standby system, processes signals, and employs an operation / standby configuration, and detects a failure of the operating signal processing unit. ,
A communication control unit for holding call information for recalling a call to a communication control unit of a standby system or a communication control unit of a newly operating system during restart control after duplex switching. . 2. A communication system for a standby system which employs a total of N active system configurations and processes a signal, and an active / standby configuration and detects a failure of the active signal processing unit. A communication control device, comprising: a control unit or a communication control unit that retains call information for recalling a call to a newly operating communication control unit that is performing restart control after duplex switching. 3. An operating communication control unit, when detecting an abnormality of an operating signal processing unit, determines whether a call can be changed and a call cannot be changed based on a calculation result of a free resource in the signal processing unit. The communication control device according to claim 1, wherein the communication control device classifies the call into a call, and holds the call as a call reassignment target table and a call disconnection target table in a standby communication control unit. 4. The communication control unit of the new active system during restart control after switching to duplexing, calculates a free resource in the signal processing unit when detecting that a call is set in the signal processing unit in an abnormal state. 3. The communication control according to claim 1 or 2, wherein the call is classified into a call that can be recalled and a call that cannot be recalled by a result and held as a call recall target table and a call disconnection target table, respectively. apparatus. 5. The communication control unit of the new active system during the restart control after the duplexing switch executes the call recall process for the call on the call recall target table, and checks its own information and the signal processing unit in the normal state. The communication control device according to claim 4, wherein the information is matched. 6. The communication control unit of the new active system during the restart control after the duplexing switch executes the call disconnection process for the call on the call disconnection target table, and transmits its own information and the information of the signal processing unit in the normal state. The communication control device according to claim 4, wherein the communication control device and the communication control device match each other. 7. The communication control unit of the new active system during the resumption control after the duplexing switch determines that the call on the call recall target table has been set to the signal processing unit in the normal state, and thus the completion of the call recall process is completed. The communication control device according to claim 5, wherein the communication control device detects the signal. 8. A radio base station apparatus comprising the communication control apparatus according to claim 1. Description: 9. A wireless network control device comprising the communication control device according to claim 1. Description: 10. A multimedia signal processing device comprising the communication control device according to claim 1. Description: 11. When an abnormality of a signal processing unit is detected by an active communication control unit, a notification is sent to a standby communication control unit at the beginning of a call reassignment process. Communication switching control method, wherein the communication switching control method manages the call switching information as call information. 12. The communication control unit of the new active system during restart control after duplex switching detects that a call is set in the signal processing unit in an abnormal state, and manages it as call information for call reassignment. A communication switching control method, comprising: 13. Communication switching characterized by executing call reassignment based on call information for call reassignment managed in advance by a communication control unit of a newly operating system during restart control after duplex switching. Control method.