JP2008148278A - Resource control apparatus, and radio network controller using apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resource control apparatus and a radio network controller using the apparatus which can prevent convergence of processing of a specific processor even when only an amount of resources used by the specific processor is decreased. <P>SOLUTION: The invention includes: a resource control means for managing an amount of resources used and an amount of virtual resources of each of plural processors; a selection control means for selecting a processor having a smallest sum of the amount of resources used and the amount of virtual resources in the resource control means in response to an external process request, increasing the amount of resources used by the selected processor in the resource control means and decreasing the amount of resources used by the processor corresponding to an external process release request in the resource control means, in response to the process release request; and a virtual resource control means for increasing the amount of virtual resources of the processor corresponding to the process release request in the resource control means, in response to the process release request to one of the processors. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a resource management apparatus and a radio network control apparatus using the same, and more particularly to a resource management apparatus that manages resources that are the processing capabilities of a plurality of processing apparatuses and a radio network control apparatus that uses the resource management apparatus.

  FIG. 1 shows a block diagram of an example of a general load balancing system. In the figure, devices 3 # 1 to 3 # n such as a DSP (Digital Signal Processor) as a plurality of processing devices, a memory 4 and an interface 5 are connected via a bus 2 under the control of a CPU 1 as a resource management device. ing. The CPU 1 manages the amount of used resources of each of the plurality of devices 3 # 1 to 3 # n, monitors the usage status, and distributes the load on the devices 3 # 1 to 3 # n.

  FIG. 2 is a block diagram of a wireless network control apparatus that is one form of the load distribution system. In the figure, a radio network controller (RNC) 10 is connected to an upper core network 11 and is connected to a lower radio base station (NodeB) 12, and a mobile terminal (UE) 13 is connected to the radio base station 12. Wireless connection is established.

  The wireless network control device 10 is provided with a CPU 20 as a resource management device and DSPs 30 # 1 to 30 # n. When the request receiving unit 21 in the CPU 20 receives a line allocation request from the core network 11 or the radio base station 12 via an application, the request is notified to the DSP selecting unit 22, and the DSP selecting unit 22 uses the resource amount managing units 26 # 1 to 26. Reference is made to the resource amount of each of the DSPs 30 # 1 to 30 # n stored in #n, and the DSP having the smallest amount of used resources is selected. The resource amount referred to at this time is the used resource amount currently used by the DSPs 30 # 1 to 30 # n.

  Thereafter, the request transmission unit 23 sends a line allocation request to the DSP (any one of 30 # 1 to 30 # n) selected by the DSP selection unit 22. The DSP that has received the line allocation request by the request reception processing unit 31 constructs a new line in the user data transmission / reception unit 32, and thereafter regularly performs user data transmission / reception processing.

  Next, when the request receiving unit 21 receives a line release request from the application, the used resource amount is subtracted from the resource amount management unit (any one of 26 # 1 to 26 # n) corresponding to the DSP that transmits the line release request. To do. Thereafter, the request transmission unit 23 sends a line release request to the request reception processing unit 31 of the DSP (any one of 30 # 1 to 30 # n). The DSP that has received the line release request executes the line release processing of the user data transmission / reception unit 32.

  The above resource amount is a numerical value of the user data processing capability in the DSPs 30 # 1 to 30 # n under the CPU 20, and is a different value depending on the service (voice, packet, etc.) and throughput to be handled. The larger this value, the greater the user data processing load per line. The used resource amount indicates a resource amount for each DSP in which the above-described resource amount is accumulated every time the line allocation is performed to the DSPs 30 # 1 to 30 # n under the CPU 20.

  When the CPU 20 issues a line assignment to the subordinate DSPs 30 # 1 to 30 # n, the CPU 20 selects a corresponding resource amount from the service type and throughput of the line, and adds to the used resource amount of the DSP when the line assignment is performed. However, when the line is released, the amount of resources used by the DSP is subtracted. In DSP selection when performing line allocation, the amount of used resources is used as a selection condition, and the DSP with the smallest amount of used resources is selected at the time of selection.

  Japanese Patent Application Laid-Open No. 2004-151561 describes predicting a depletion time by predicting a computer resource usage amount after a predetermined time from a computer resource usage amount.

Further, Patent Document 2 uses a function representing the correlation between past transaction processing amount and used resource amount, generates a change in used resource amount predicted from a change in transaction generation amount, and assigns an allocated resource amount for each module. Is described as automatically changing.
JP 2005-182697 A JP 2004-318474 A

  Conventionally, a subordinate device with the smallest amount of used resources is selected with reference to the amount of used resources.

  FIG. 3 shows an example of a change over time in the amount of used resources of each of the DSPs 30 # 1 to 30 # n. If only the amount of resources used by the DSP 30 # 2 becomes extremely small due to the line opening at the time t1, the line allocation at the subsequent time t2 will be concentrated on the DSP 30 # 2 having the small amount of resources used.

  As a result, in the DSP 30 # 2 in which lines are allocated intensively in a short period of time, the reception processing of the line allocation request from the CPU 20 in the request reception processing unit 31 is congested, and as shown in FIG. 4A, the DSP 30 # 2 The internal processing limit is exceeded. As a result, the processing of the user data transmission / reception processing unit 25 inside the DSP 30 # 2 is compressed, and there is a risk of falling into an abnormal state such as a response delay.

  On the other hand, no DSP 30 # 1, 30 # 3 to 30 # n other than the DSP 30 # 2 in a congested state is allocated to a new line. Therefore, as shown in FIG. 3 to 30 # n has a margin in processing, and there is a problem that load distribution at time t2 does not function well.

  The present invention has been made in view of the above points, and prevents congestion of processing of a specific processing device even in a situation where only the amount of resources used by the specific processing device has been reduced. It is an object of the present invention to provide a resource management device that can perform load distribution well and a wireless network control device using the same.

A resource management device according to an embodiment of the present invention is a resource management device for a load distribution system in which a resource that is the processing capability of each of a plurality of processing devices is managed by the resource management device, and load distribution is performed by the plurality of processing devices. ,
Resource management means for managing the amount of used resources and the amount of virtual resources for each of the plurality of processing devices;
In response to an external processing request, a processing device having the smallest sum of the used resource amount and the virtual resource amount in the resource management unit is selected, and the used resource amount of the selected processing device in the resource management unit is increased. Selection control means for reducing the amount of resources used by the processing device corresponding to the process release request in the resource management means in response to the process release request from
Virtual resource control means for increasing the virtual resource amount of the processing device corresponding to the processing release request in the resource management means in response to a processing release request for any of the processing devices;
A request transmission unit that selects or transmits the processing request or processing release request from the outside to the corresponding processing device, so that even if the amount of used resources of the specific processing device is reduced, Processing congestion of the processing device can be prevented.

In the resource management device,
The virtual resource control unit may be configured to increase the virtual resource amount by the same amount or a predetermined ratio as the used resource amount to be decreased by the selection control unit.

In the resource management device,
The virtual resource control means may be configured to reduce the virtual resource amounts of all processing devices in the resource management means at a constant rate at regular time intervals.

According to another embodiment of the present invention, a resource management device manages resources that are processing capacities of a plurality of processing devices with a resource management device, and performs resource management of a load distribution system that performs load distribution with the plurality of processing devices. In the device
Resource management means for managing the amount of used resources and the amount of virtual resources for each of the plurality of processing devices;
In response to an external processing request, a processing device having the smallest sum of the used resource amount and the virtual resource amount in the resource management unit is selected, and the used resource amount of the selected processing device in the resource management unit is increased. Selection control means for reducing the amount of resources used by the processing device corresponding to the process release request in the resource management means in response to the process release request from
The virtual resource amount of each of the plurality of processing devices managed by the resource management means at a fixed period is based on the maximum amount of resource used by the plurality of processing devices, the amount of resources that can be increased, and the amount of resource used by the own processing device. Virtual resource control means to be set,
A request transmission unit that selects or transmits the processing request or processing release request from the outside to the corresponding processing device, so that even if the amount of used resources of the specific processing device is reduced, Processing congestion of the processing device can be prevented.

In the resource management device,
The virtual resource control means is a value obtained by subtracting a virtual resource amount of each of the plurality of processing devices from a maximum resource usage amount of the plurality of processing devices and a resource usage amount of the processing device that can be increased. It is good also as a structure set to.

A radio network control device according to an embodiment of the present invention is a radio network control device using the resource management device,
The resource management device transmits an external line allocation request or line release request to the selected or corresponding processing device,
Each of the plurality of processing devices includes request receiving means for receiving a line allocation request or a line release request from the resource management device;
By having user data transmission / reception processing by constructing a new line in response to the line allocation request and performing user data transmission / reception processing by releasing the line in response to the line release request, only the amount of resources used by a specific processing device is reduced. Even in such a situation, congestion of processing of a specific processing device can be prevented.

  According to the present invention, even in a situation where only the amount of resources used by a specific processing device is reduced, it is possible to prevent the congestion of processing of the specific processing device and to perform load distribution to a plurality of processing devices.

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

<First embodiment>
FIG. 5 shows a block configuration diagram of a first embodiment of a wireless network control apparatus which is an embodiment of the load distribution system of the present invention. In the figure, a radio network controller (RNC) 40 is connected to an upper core network 41 and is connected to a lower radio base station (NodeB) 42, and a mobile terminal (UE) 43 is connected to the radio base station 42. Wireless connection is established.

  The wireless network control device 40 is provided with a CPU 50 as a resource management device and DSPs 60 # 1 to 60 # n as a plurality of processing devices.

  In the CPU 50, there are a request receiving unit 51 that receives a processing request for line allocation or line release from a host device, a DSP selecting unit 52 that selects a DSP that transmits a processing request, and a DSP that is selected as a request transmission destination. A request transmission unit 53 that transmits a processing request, a resource amount management unit 56 that manages a used resource amount and a virtual resource amount of each DSP, and an update (increase / decrease) of a virtual resource amount managed by the resource amount management unit 56 A virtual resource control unit 58 that performs control is provided.

  In the DSPs 60 # 1 to 60 # n, a request reception processing unit 61 that receives and processes processing requests from the CPU 50 and a user data transmission / reception unit 62 that performs transmission / reception of user data are provided.

  When the request reception unit 51 in the CPU 50 receives a line allocation request from the core network 41 or the radio base station 42 via an application, the request reception unit 51 notifies the DSP selection unit 52 of the line allocation request, and the DSP selection unit Reference numeral 52 refers to the used resource amount and virtual resource amount of each of the DSPs 60 # 1 to 60 # n stored in the resource amount management units 56 # 1 to 56 # n, and selects the DSP having the minimum resource amount.

  The resource amount referred to at this time is the sum of the used resource amount and the virtual resource amount of the DSPs 60 # 1 to 60 # n. Thereafter, the request transmission unit 53 sends a line allocation request to the DSP (any one of 60 # 1 to 60 # n) selected by the DSP selection unit 52. The DSP that has received the line allocation request by the request reception processing unit 61 constructs a new line in the user data transmission / reception unit 62, and thereafter regularly performs user data transmission / reception processing.

  The above resource amount is a numerical value of the user data processing capability in the DSPs 60 # 1 to 60 # n under the CPU 50, and is a different value depending on the service (voice, packet, etc.) and throughput to be handled. The larger this value, the greater the user data processing load per line. The used resource amount indicates a resource amount for each DSP in which the above-described resource amount is accumulated every time line allocation is performed for the DSPs 60 # 1 to 60 # n under the CPU 50.

  When the CPU 50 issues a line assignment to the subordinate DSPs 60 # 1 to 60 # n, the CPU 50 selects a corresponding resource amount from the service type and throughput of the line, and adds the added resource amount to the DSP when performing the line assignment. However, when the line is released, the amount of resources used by the DSP is subtracted. In DSP selection at the time of line allocation, the sum of the used resource amount and the virtual resource amount is used as a selection condition, and the DSP having the smallest sum of the used resource amount and the virtual resource amount is selected at the time of selection.

  Next, when receiving a line release request from the core network 41 or the wireless base station 42 via an application, the request reception unit 51 issues a virtual resource increase request to the virtual resource control unit 58. The virtual resource control unit 58 that has received the increase request instructs the resource amount management units 56 # 1 to 56 # n to update (increase) the virtual resource corresponding to the DSP that transmits the line release request. The increase amount of the virtual resource at this time is, for example, a predetermined ratio α (for example, several 10% to 100%) of the released resource amount. Note that the virtual resource control unit 58 sets the virtual resource amounts of all the resource amount management units 56 # 1 to 56 # n at a certain rate β (for example, several percent to Decrease by 10%).

  Further, the DSP selection unit 52 notified of the line release request from the request reception unit 51 obtains the amount of used resources from the resource amount management unit (any of 56 # 1 to 56 # n) corresponding to the DSP that transmits the line release request. Subtract.

  Thereafter, a line release request is sent from the request transmission unit 53 to the request reception processing unit 61 of the DSP (any one of 60 # 1 to 60 # n). The DSP that has received the line release request executes the line release processing of the user data transmission / reception unit 62.

  FIG. 6 shows a flowchart of an embodiment of a DSP selection process executed by the DSP selection unit 52. In the figure, step S10 shows a loop process in which the variable i is sequentially incremented from 1 to the number n of all DSPs. Before starting this process, the maximum value is set in the variable min.

  In step S11, the sum of the used resource amount and the virtual resource amount managed by the resource amount management unit 56 # i for the DSP 60 # i is obtained and stored in the variable RDSP # i. Next, in step S12, the value of the variable min is compared with the value of the variable RDSP # i. Only when the value of the variable min is large, the value of the variable RDSP # i is transferred to the variable min, and the value of the variable i is changed to the variable SEL. Forward to.

  Thus, when the above loop processing is completed, the number of the DSP with the smallest sum of the used resource amount and the virtual resource amount is stored in the variable i.

  FIG. 7 shows a flowchart of an embodiment of line release processing executed by the DSP selection unit 52 and the virtual resource control unit 58 in response to a line release request. In the figure, the DSP selection unit 52 determines the used resource amount #i managed by the resource amount management unit 56 # i for the DSP 60 # i that has been requested to release the line in step S20. Only decrease.

  In addition, the virtual resource control unit 58 sets the virtual resource amount managed by the resource amount management unit 56 # i for the DSP 60 # i that has been requested to release the line in step S21 to a predetermined ratio of the released resource amount indicated by the line release request. Increase by α.

  FIG. 8 shows a flowchart of an embodiment of timer processing executed by the virtual resource control unit 58. In the figure, in step S30, it is determined whether or not the timer 58a built in the virtual resource control unit 58 has been started by measuring a fixed time τ such as 10 msec. When the timer 58a is started, the process proceeds to step S31, and the virtual resource control unit 58 decreases the virtual resource amount #i of all the resource amount management units 56 # 1 to 56 # n by a constant ratio β.

  FIG. 9 shows temporal changes in the amount of used resources of the DSPs 60 # 1 to 60 # n according to the first embodiment. Even when only the amount of resources used by DSP 60 # 2 is extremely reduced due to the line opening at time t1, the amount of virtual resources indicated by vertical lines is increased by a predetermined ratio α of the amount of released resources. For the subsequent line assignment, the DSP with the smallest sum of the used resource amount and the virtual resource amount of each of the DSPs 60 # 1 to 60 # n is selected, so that at time t2, the line assignment to the DSP 60 # 2 is performed by another DSP 60 #. Although it is more than the line assignment to 1, DSPs 60 # 3 to 60 # n, it is performed almost on average. Thereafter, the virtual resource amount of the DSP 60 # 2 gradually decreases at times t2, t3,.

  As a result, the processing congestion level of the DSP 60 # 2 does not exceed the processing limit value as shown in FIG. That is, even in a situation where only the amount of resources used by a specific processing device is reduced, congestion of processing of the specific processing device can be prevented and load distribution can be performed well for a plurality of processing devices.

  Further, the processing congestion levels of the DSPs 60 # 1, 60 # 3 to 60 # n other than the DSP 60 # 2 are as shown in FIG. 10B because new line allocation is performed, and load distribution at time t2 is reduced. Works well. Further, since the virtual resource amount of the DSP 60 # 2 gradually decreases, the used resource amount of the DSP 60 # 2 gradually increases at the subsequent times t2 and t3, and the other DSPs 60 # 1, 60 # 3 to 60 # n It is about the same as the amount of resources used.

  By the way, FIG. 11A shows a temporal change of the virtual resource amount in the DSP 60 # 2. Here, when a line release instruction is given at time t10, the virtual resource amount temporarily increases, and thereafter, the virtual resource amount decreases every certain time (subtraction cycle) τ. Then, the used resource amount (existing), the new used resource amount, and the virtual resource amount in the DSP 60 # 2 change as shown in FIG. 11B. That is, the sum of the new used resource amount and the virtual resource amount becomes substantially constant or gradually decreases. On the other hand, conventionally, as shown in FIG. 11C, the amount of used resources decreases sharply at time t10 when the line opening is instructed, and then increases rapidly at time t11. Because of the rapid increase in the number, the processing limit of DSP30 # 2 was exceeded.

<Second Embodiment>
The first embodiment described above is effective when resources are allocated intensively while the amount of virtual resources is large. However, as shown in FIG. 12, when resources are intensively allocated after time t4 when the virtual resource value becomes small after a certain amount of time has elapsed since a large amount of virtual resources is given, the result is that The resource effect is lost, and the line allocation is concentrated on the DSP 60 # 2 that uses a small amount of resources.

  As a result, in the DSP 60 # 2 in which lines are allocated intensively in a short period of time, the reception processing of the line allocation request from the CPU in the request reception processing unit is congested, and the processing of the user data transmission / reception processing unit in the DSP 60 # 2 is under pressure. The risk of falling into an abnormal state such as a response delay cannot be sufficiently avoided.

  The second embodiment described below solves this problem. FIG. 13 shows a block configuration diagram of a second embodiment of a wireless network control apparatus which is an embodiment of the load distribution system of the present invention. In the figure, the same parts as those in FIG.

  In FIG. 13, a radio network controller (RNC) 40 is connected to an upper core network 41 and is connected to a lower radio base station (NodeB) 42, and a mobile terminal (UE) 43 is connected to the radio base station 42. Wireless connection is established.

  The wireless network control device 40 is provided with a CPU 50 as a resource management device and DSPs 60 # 1 to 60 # n as a plurality of processing devices.

  In the CPU 50, there are a request receiving unit 51 that receives a processing request for line allocation or line release from a host device, a DSP selecting unit 52 that selects a DSP that transmits a processing request, and a DSP that is selected as a request transmission destination. A request transmission unit 53 that transmits a processing request, a resource amount management unit 56 that manages a used resource amount and a virtual resource amount of each DSP, and an update (increase / decrease) of a virtual resource amount managed by the resource amount management unit 56 A virtual resource control unit 70 that performs control is provided.

  In the DSPs 60 # 1 to 60 # n, a request reception processing unit 61 that receives and processes processing requests from the CPU 50 and a user data transmission / reception unit 62 that performs transmission / reception of user data are provided.

  When the request reception unit 51 in the CPU 50 receives a line allocation request from the core network 41 or the radio base station 42 via an application, the request reception unit 51 notifies the DSP selection unit 52 of the line allocation request, and the DSP selection unit Reference numeral 52 refers to the used resource amount and virtual resource amount of each of the DSPs 60 # 1 to 60 # n stored in the resource amount management units 56 # 1 to 56 # n, and selects the DSP having the minimum resource amount.

  The resource amount referred to at this time is the sum of the used resource amount and the virtual resource amount of the DSPs 60 # 1 to 60 # n. Thereafter, the request transmission unit 53 sends a line allocation request to the DSP (any one of 60 # 1 to 60 # n) selected by the DSP selection unit 52. The DSP that has received the line allocation request by the request reception processing unit 61 constructs a new line in the user data transmission / reception unit 62, and thereafter regularly performs user data transmission / reception processing.

  The above resource amount is a numerical value of the user data processing capability in the DSPs 60 # 1 to 60 # n under the CPU 50, and is a different value depending on the service (voice, packet, etc.) and throughput to be handled. The larger this value, the greater the user data processing load per line. The used resource amount indicates a resource amount for each DSP in which the above-described resource amount is accumulated every time line allocation is performed for the DSPs 60 # 1 to 60 # n under the CPU 50.

  When the CPU 50 issues a line assignment to the subordinate DSPs 60 # 1 to 60 # n, the CPU 50 selects a corresponding resource amount from the service type and throughput of the line, and adds the added resource amount to the DSP when performing the line assignment. However, when the line is released, the amount of resources used by the DSP is subtracted. In DSP selection at the time of line allocation, the sum of the used resource amount and the virtual resource amount is used as a selection condition, and the DSP having the smallest sum of the used resource amount and the virtual resource amount is selected at the time of selection.

  Next, when a line release request is received from the core network 41 or the radio base station 42 via an application, the request reception unit 51 notifies the DSP selection unit 52 of the line release request. The DSP selection unit 52 subtracts the used resource amount from the resource amount management unit (any of 56 # 1 to 56 # n) corresponding to the DSP that transmits the line release request.

  The virtual resource control unit 70 sets the virtual resource amounts of all the resource amount management units 56 # 1 to 56 # n every certain time δ (for example, δ is several msec to 10 several msec) which is a virtual resource change period.

  Thereafter, a line release request is sent from the request transmission unit 53 to the request reception processing unit 61 of the DSP (any one of 60 # 1 to 60 # n). The DSP that has received the line release request executes the line release processing of the user data transmission / reception unit 62.

  FIG. 14 shows a flowchart of an embodiment of a virtual resource setting process executed by the virtual resource control unit 70. This process is executed at regular intervals δ by interruption from the timer 70a. Here, MUX is the maximum amount of resource that can be set in the DSP (each of 60 # 1 to 60 # n), the coefficient Y is a value of about 0.3, for example, and MUX × Y increases at one time for one DSP. This represents a possible resource amount, where UDSP # i is a used resource amount of DSP # i and VDSP # i is a virtual resource amount of DSP # i.

  In the figure, variable X is reset to zero in step S40. Step S41 shows a loop process in which the variable i is sequentially incremented from 1 to the number n of all DSPs.

  In step S42, it is determined whether or not the used resource amount UDSP # i managed by the resource amount management unit 56 # i for the DSP 60 # i exceeds the value stored in the variable X, and X <UDP # i is satisfied. Only in this case, the content of the used resource amount UDSP # i is stored in the variable X in step S43. Thus, the variable X stores the maximum used resource amount among the DSPs 60 # 1 to 60 # n.

  Next, step S45 shows a loop process in which the variable i is sequentially incremented from 1 to the number n of all DSPs. In step S46, a value obtained by subtracting the used resource amount UDSP # i managed by the resource amount management unit 56 # i for the DSP 60 # i from the maximum used resource amount stored in the variable X (X-UDP # i) Is less than MUX × Y.

  If MUX × Y ≦ X-UDP # i, that is, if the difference between the maximum used resource amount and the used resource amount of the own DSP is equal to or greater than the resource amount that can be increased, the virtual resource amount VDSP # i in step S47 To [X- (MUX × Y) -UDP # i]. That is, the value obtained by subtracting the resource amount that can be increased from the maximum resource usage amount X and the resource usage amount of the own DSP is used as the virtual resource amount.

  On the other hand, if MUX × Y> X-UDDSP # i, that is, if the difference between the maximum used resource amount and the used resource amount of the own DSP is smaller than the increaseable resource amount, the virtual resource amount VDSP in step S48. #I is 0. Thereby, the virtual resource amounts of the DSPs 60 # 1 to 60 # n are set.

  FIG. 15 shows temporal changes in the amount of used resources of the DSPs 60 # 1 to 60 # n according to the second embodiment. Even if only the amount of resources used by DSP 60 # 2 becomes extremely small due to the line opening at time t1, a virtual resource amount [X- (MUX × Y) -UDSP # i] indicated by a vertical line is set. For the subsequent line assignment, the DSP with the smallest sum of the used resource amount and the virtual resource amount of each of the DSPs 60 # 1 to 60 # n is selected, so that at time t2, the line assignment to the DSP 60 # 2 is performed by another DSP 60 #. Although it is more than the line assignment to 1, DSPs 60 # 3 to 60 # n, it is performed almost on average. Thereafter, the virtual resource amount gradually decreases as the used resource amount of the DSP 60 # 2 increases at times t4 and t5.

  As a result, the processing congestion level of the DSP 60 # 2 does not exceed the processing limit value. That is, even in a situation where only the amount of resources used by a specific processing device is reduced, congestion of processing of the specific processing device can be prevented and load distribution can be performed well for a plurality of processing devices.

  FIG. 16A shows temporal changes in the virtual resource amount in the DSP 60 # 2. Here, when a line release instruction is given at time t10, the virtual resource amount increases at the timing of the virtual resource change period δ immediately after that. Thereafter, if there is a line allocation after time t11, the virtual resource amount decreases. Then, the used resource amount (existing), the new used resource amount, and the virtual resource amount in the DSP 60 # 2 change as shown in FIG. In other words, the sum of the new used resource amount and the virtual resource amount is substantially constant and does not exceed the maximum resource amount X that can be set even if there is a line assignment. As shown in FIG. 16C, the processing congestion degree of the DSP 60 # 2 does not exceed the processing limit value.

  As a result, the virtual resource amount can be maintained in the first embodiment even in the time zone when the virtual resource amount is small in the first embodiment, and the line allocation is concentrated on the DSP 60 # 2 having a small amount of used resources. This can prevent the congestion of the line allocation request reception processing in the DSP 60 # 2.

In the above embodiment, the resource amount management unit 56 is used as an example of the resource management unit, the DSP selection unit 52 is used as an example of the selection control unit, and the virtual resource control units 58 and 70 are used as an example of the virtual resource control unit. The request transmission unit 53 is used as an example of the request transmission unit, the request reception processing unit 61 is used as an example of the request reception unit, and the user data transmission / reception unit 62 is used as an example of the user data transmission / reception unit.
(Appendix 1)
In a resource management device of a load distribution system in which resources that are processing capabilities of a plurality of processing devices are managed by a resource management device and load distribution is performed by the plurality of processing devices,
Resource management means for managing the amount of used resources and the amount of virtual resources for each of the plurality of processing devices;
In response to an external processing request, a processing device having the smallest sum of the used resource amount and the virtual resource amount in the resource management unit is selected, and the used resource amount of the selected processing device in the resource management unit is increased. Selection control means for reducing the amount of resources used by the processing device corresponding to the process release request in the resource management means in response to the process release request from
Virtual resource control means for increasing the virtual resource amount of the processing device corresponding to the processing release request in the resource management means in response to a processing release request for any of the processing devices;
A resource management apparatus comprising: a request transmission unit configured to transmit a processing request or a processing release request from the outside to a selected or corresponding processing device.
(Appendix 2)
In the resource management device according to attachment 1,
The virtual resource control unit increases the virtual resource amount by the same amount or a predetermined ratio as the used resource amount to be decreased by the selection control unit.
(Appendix 3)
In the resource management device according to attachment 2,
The virtual resource control unit reduces the virtual resource amount of all processing devices in the resource management unit at a constant rate at regular intervals.
(Appendix 4)
In a resource management device of a load distribution system in which resources that are processing capabilities of a plurality of processing devices are managed by a resource management device and load distribution is performed by the plurality of processing devices,
Resource management means for managing the amount of used resources and the amount of virtual resources for each of the plurality of processing devices;
In response to an external processing request, a processing device having the smallest sum of the used resource amount and the virtual resource amount in the resource management unit is selected, and the used resource amount of the selected processing device in the resource management unit is increased. Selection control means for reducing the amount of resources used by the processing device corresponding to the process release request in the resource management means in response to the process release request from
The virtual resource amount of each of the plurality of processing devices managed by the resource management means at a fixed period is based on the maximum amount of resource used by the plurality of processing devices, the amount of resources that can be increased, and the amount of resource used by the own processing device. Virtual resource control means to be set,
A resource management apparatus comprising: a request transmission unit configured to transmit a processing request or a processing release request from the outside to a selected or corresponding processing device.
(Appendix 5)
In the resource management device according to attachment 4,
The virtual resource control means is a value obtained by subtracting a virtual resource amount of each of the plurality of processing devices from a maximum resource usage amount of the plurality of processing devices and a resource usage amount of the processing device that can be increased. A resource management apparatus characterized by being set to
(Appendix 6)
A wireless network control device using the resource management device according to any one of appendices 1 to 5,
The resource management device transmits an external line allocation request or line release request to the selected or corresponding processing device,
Each of the plurality of processing devices includes request receiving means for receiving a line allocation request or a line release request from the resource management device;
A radio network control apparatus comprising: user data transmission / reception means for constructing a new line in response to the line allocation request, performing user data transmission / reception processing, and releasing the line in response to the line release request.
(Appendix 7)
In the resource management device according to attachment 1,
The resource management apparatus according to claim 1, wherein the predetermined ratio is several 10% to 100%.
(Appendix 8)
In the resource management device according to attachment 3,
The resource management apparatus characterized in that the predetermined time is several milliseconds to several tens of milliseconds.
(Appendix 9)
In the resource management device according to attachment 8,
The resource management apparatus according to claim 1, wherein the predetermined ratio is from several% to several tens%.

It is a block diagram of an example of a general load distribution system. 1 is a block configuration of a wireless network control device that is one form of a load distribution system. It is a figure which shows the time change of an example of the usage-resource amount of each DSP. It is a figure which shows the time change of the processing congestion degree of each DSP. It is a block block diagram of 1st Embodiment of the radio network control apparatus which is one form of the load distribution system of this invention. It is a flowchart of one Embodiment of DSP selection processing. 6 is a flowchart of an embodiment of a line release process. It is a flowchart of one embodiment of timer processing. It is a figure which shows the time change of 1st Embodiment of the usage-resource amount of each DSP. It is a figure which shows the time change of the processing congestion degree of each DSP. It is a figure which shows the time change of this invention and the conventional various resource amount. It is a figure which shows the time change of 1st Embodiment of the usage-resource amount of each DSP. It is a block block diagram of 2nd Embodiment of the radio network control apparatus which is one form of the load distribution system of this invention. It is a flowchart of one Embodiment of a virtual resource setting process. It is a figure which shows the time change of 2nd Embodiment of the usage-resource amount of each DSP. It is a figure which shows the time change of the various resource amount and processing congestion degree of this invention.

Explanation of symbols

40 Radio Network Controller (RNC)
41 Core network 42 Radio base station (NodeB)
43 Mobile terminal (UE) 43
50 CPU
60 # 1-60 # n DSP
51 Request Reception Unit 52 DSP Selection Unit 53 Request Transmission Unit 56 Resource Amount Management Unit 58, 70 Virtual Resource Control Unit 58a, 70a Timer 61 Request Reception Processing Unit 62 User Data Transmission / Reception Unit

Claims (6)

In a resource management device of a load distribution system in which resources that are processing capabilities of a plurality of processing devices are managed by a resource management device and load distribution is performed by the plurality of processing devices,
Resource management means for managing the amount of used resources and the amount of virtual resources for each of the plurality of processing devices;
In response to an external processing request, a processing device having the smallest sum of the used resource amount and the virtual resource amount in the resource management unit is selected, and the used resource amount of the selected processing device in the resource management unit is increased. Selection control means for reducing the amount of resources used by the processing device corresponding to the process release request in the resource management means in response to the process release request from
Virtual resource control means for increasing the virtual resource amount of the processing device corresponding to the processing release request in the resource management means in response to a processing release request for any of the processing devices;
A resource management apparatus comprising: a request transmission unit configured to transmit a processing request or a processing release request from the outside to a selected or corresponding processing device. The resource management device according to claim 1, wherein
The virtual resource control unit increases the virtual resource amount by the same amount or a predetermined ratio as the used resource amount to be decreased by the selection control unit. The resource management apparatus according to claim 2, wherein
The virtual resource control unit reduces the virtual resource amount of all processing devices in the resource management unit at a constant rate at regular intervals. In a resource management device of a load distribution system in which resources that are processing capabilities of a plurality of processing devices are managed by a resource management device and load distribution is performed by the plurality of processing devices,
Resource management means for managing the amount of used resources and the amount of virtual resources for each of the plurality of processing devices;
In response to an external processing request, a processing device having the smallest sum of the used resource amount and the virtual resource amount in the resource management unit is selected, and the used resource amount of the selected processing device in the resource management unit is increased. Selection control means for reducing the amount of resources used by the processing device corresponding to the process release request in the resource management means in response to the process release request from
The virtual resource amount of each of the plurality of processing devices managed by the resource management means at a fixed period is based on the maximum amount of resource used by the plurality of processing devices, the amount of resources that can be increased, and the amount of resource used by the own processing device. Virtual resource control means to be set,
A resource management apparatus comprising: a request transmission unit configured to transmit a processing request or a processing release request from the outside to a selected or corresponding processing device. The resource management device according to claim 4, wherein
The virtual resource control means is a value obtained by subtracting a virtual resource amount of each of the plurality of processing devices from a maximum resource usage amount of the plurality of processing devices and a resource usage amount of the processing device that can be increased. A resource management apparatus characterized by being set to A wireless network control device using the resource management device according to any one of claims 1 to 5,
The resource management device transmits an external line allocation request or line release request to the selected or corresponding processing device,
Each of the plurality of processing devices includes request receiving means for receiving a line allocation request or a line release request from the resource management device;
A radio network control apparatus comprising: user data transmission / reception means for constructing a new line in response to the line allocation request, performing user data transmission / reception processing, and releasing the line in response to the line release request.

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