JP2004260257A - Radio base station apparatus, and method for allocating radio resource for radio base station apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio base station capable of preventing its processing from being complicated due to reallocation processing of resources carried out for an efficient use of the resources. <P>SOLUTION: A load measurement section 13 measures the processing load of a communication setting section 12 while the resource reallocation processing is executed and outputs a measured processing load value to a comparison section 16. The comparison section 16 compares the processing load value outputted from the load measurement section 13 with a threshold value stored in a threshold value storage section 14 and outputs the result of comparison to the communication setting section 12. A resource reallocation section 122 of the communication setting section 12 continuously carries out the discrimination as to whether the reallocation processing is to be continued or to be terminated on the basis of the result of comparison outputted from the comparison section 16. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a radio base station apparatus and a radio resource allocation method for the radio base station apparatus. For example, the present invention relates to a radio base station apparatus and a radio base station apparatus in a W-CDMA (Wide band-Code Division Multiple Access) mobile communication system. Wireless resource allocation method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a mobile communication system such as a W-CDMA system includes a plurality of mobile stations and a wireless base station apparatus that wirelessly communicates with the plurality of mobile stations.
[0003]
The wireless base station device includes a communication function unit for communicating with a mobile station, and a communication setting unit for performing various settings for the communication function unit.
[0004]
The communication function unit includes a plurality of baseband cards that perform baseband signal processing. The baseband signal processing performed by a plurality of baseband cards is a process of demodulating and decoding a received signal received from a mobile station, and encoding and modulating a transmission signal to be transmitted to the mobile station.
[0005]
Each baseband card includes a plurality of wireless resources (hereinafter, wireless resources are referred to as “resources”) each of which performs baseband signal processing.
[0006]
Each of the plurality of resources is, for example, a group of circuits configured with various circuits for performing baseband signal processing unique to the W-CDMA system. Each of the plurality of resources can operate independently. Each of the plurality of resources is arranged in a predetermined order on the baseband card.
[0007]
The communication setting unit that performs various settings for the communication function unit including a plurality of resources includes a base station control unit and a resource allocation unit.
[0008]
When receiving a call requested from a mobile station such as a mobile phone, the base station controller operates the resource allocator. The resource allocating unit allocates, to the call received by the base station control unit, a source which is not yet allocated to the call in the baseband card.
[0009]
The resources allocated to the call received by the base station control unit operate to perform wireless communication with the mobile station that has transmitted the call allocated to itself.
[0010]
Hereinafter, resources that have not been allocated to a call in the baseband card are referred to as vacant resources or vacant resources.
[0011]
In the case of the W-CDMA wireless system or the like, there are a plurality of types of calls, such as voice data calls and packet data calls, and the number of resources required for one call differs depending on the type of call.
[0012]
Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-95039) describes a method of allocating a free resource to a call newly requested and accepted by a mobile station in a wireless base station device to which the W-CDMA system is applied. Have been.
[0013]
The resource allocation method described in Patent Literature 1 obtains a required number of resources according to the type of a call requested and accepted by a mobile station, searches for available resources for the determined number of resources, To allocate the free resources found by the search.
[0014]
In a wireless base station apparatus to which the W-CDMA system or the like is applied, when allocating free resources to one call that requires a plurality of resources, all of the plurality of resources allocated to the call are the same. The resources that need to be present on the baseband card and the resources allocated for the call need to be consecutively arranged on the baseband card.
[0015]
Therefore, the actual resource allocation process searches for a baseband card in which the number of resources equal to or greater than the number of resources required by the call received and requested by the mobile station is continuously available, and the received call is In other words, the process allocates consecutive free resources of the baseband card found by the search. If the number of resources required by the call requested and received by the mobile station is 1, there is no need to search for a baseband card whose resources are continuously free.
[0016]
Further, when the call to which the resource is allocated is disconnected, the radio base station apparatus operates the resource allocating unit to release the allocation of the disconnected call to the resource.
[0017]
When the resource allocating unit in the radio base station apparatus to which the W-CDMA scheme or the like is applied repeatedly performs resource allocation and resource release, resources allocated to a call that has not been disconnected become baseband. The likelihood of being scattered on the card is increased, and the vacant resources are also more likely to be scattered on the baseband card.
[0018]
One of the factors that cause a situation in which vacant resources are scattered in the radio base station apparatus is that a communication system in which the number of resources required for one call is different according to the type of call is adopted. can give.
[0019]
For example, when a call using two resources is disconnected, two consecutive resources become idle. Thereafter, if the number of resources required by the newly received call is 3, if the resources adjacent to the two consecutive resources that have just become available are free, the two free resources can be allocated. However, if it is not free, it cannot be assigned to a newly received call, and there is a possibility that two consecutive free resources remain.
[0020]
When vacant resources are scattered, it is not possible to allocate free resources for newly received calls even though the total number of vacant resources is larger than the number of resources required for newly received calls. A problem arises and resources cannot be used efficiently.
[0021]
For example, in a certain baseband card, when vacant resources and resources already allocated to a call are alternately arranged one by one, the number of resources required by a newly received call is two. Thus, although the total number of available resources is larger than the number of resources required by a newly received call, it becomes impossible to allocate an available resource to a newly received call.
[0022]
To address the problem of not being able to allocate free resources for a newly received call when the total number of free resources is greater than the number of resources required by the newly received call, a physical However, the number of components will increase due to the increase in the number of baseband cards. In addition, the problem of resource inefficiency cannot be solved.
[0023]
Patent Literature 2 (Japanese Patent Application Laid-Open No. 2001-285480) discloses that although the total number of available resources is larger than the number of resources required for a newly received call, it is available for a newly received call. A wireless base station device that can solve the problem that resources cannot be allocated is described.
[0024]
The wireless base station device described in Patent Literature 2 performs a process of rearranging resources allocated to a call that has not been disconnected so that the resources are arranged as closely as possible on a baseband card.
[0025]
Specifically, when the resources allocated to the call that has not been disconnected are scattered in the same baseband card, the resources allocated to the call that has not been disconnected are rearranged so as to be united in the same baseband card. In this case, there is a set of free resources in the baseband card.
[0026]
Furthermore, the radio base station apparatus described in Patent Literature 2 performs relocation by changing resource allocation for a call to which resources of a predetermined baseband card have been allocated to resources of another baseband card. In this case, a set of free resources is generated in a predetermined baseband card.
[0027]
Further, in the wireless base station apparatus described in Patent Document 2, if resources are rearranged when allocating resources to a newly accepted call, the time until the allocation is completed inevitably increases. By re-allocating resources at the time of resource allocation release due to disconnection of a call, the time for allocating resources to a newly accepted call is shortened.
[0028]
[Patent Document 1]
JP-A-2002-95039
[Patent Document 2]
JP 2001-285480 A
[0029]
[Problems to be solved by the invention]
In the invention described in Patent Document 1, resources cannot be used efficiently.
[0030]
In the radio base station apparatus described in Patent Document 2, for example, the number of resources to be relocated is large, and the processing load for relocating resources increases.
[0031]
Further, the wireless base station device described in Patent Document 2 receives a new call while performing a resource relocation process with a large processing load, and performs a relocation process with a large processing load and a resource allocation process for a new call. Must be performed consecutively, which complicates the processing and increases the processing load. If a new call is accepted while performing a resource relocation process with a large processing load, resource relocation takes time, and the new call is accepted before allocating resources to the new call There is a problem that the time required to perform the operation becomes long.
[0032]
An object of the present invention is to prevent a process of a radio base station apparatus from being complicated by a resource rearrangement process performed for efficient use of resources, and also to prevent a new call from being accepted. An object of the present invention is to provide a radio base station apparatus and a radio resource allocation method for a radio base station apparatus, which can prevent a long time from ending resource allocation for a new call.
[0033]
[Means for Solving the Problems]
In order to achieve the above object, a radio base station apparatus of the present invention includes a baseband signal processing unit including a plurality of radio resources for performing radio communication with a mobile station, and a mobile station that performs communication via the radio resources. A resource allocation processing unit that performs an allocation process of allocating the radio resource to a call requested by a station and an allocation change process of changing an allocation of a radio resource to a call to which the radio resource is allocated, and the resource allocation process A processing load measurement unit that measures a processing load of the unit, and an allocation change process performed by the resource allocation processing unit when the processing load of the resource allocation processing unit measured by the processing load measurement unit is larger than a predetermined value. And a control unit.
[0034]
According to the above invention, when the processing load of the resource allocation processing unit is large, the allocation change processing is terminated, so that the processing load of the resource allocation processing unit increases during the allocation change processing, and the allocation change processing becomes complicated. It can be prevented.
[0035]
In addition, since the assignment change process can be prevented from being complicated, it is possible to prevent the execution time of the assignment change process from being lengthened. Therefore, for example, when a new call is received during the execution of the assignment change process, the execution time of the assignment change process does not become long, so that the resource is assigned to the new call after accepting the new call. It is possible to prevent the time until the end is lengthened.
[0036]
Further, the radio base station apparatus of the present invention, in the above radio base station apparatus, further includes an upper limit value storage unit for storing an upper limit value of the number of radio resources for which the resource allocation processing unit changes the allocation. The unit sets an upper limit value of the number of radio resources whose allocation is changed at the time of executing the allocation change process to an upper limit value stored in the upper limit value storage unit.
[0037]
According to the above invention, in addition to the same effects as described above, since the upper limit of the number of radio resources to be changed is determined, the number of radio resources to be changed is increased. It is possible to prevent the processing load from increasing and the assignment change processing from becoming complicated.
[0038]
Further, in the radio base station apparatus according to the present invention, in the above radio base station apparatus, the radio resource performs W-CDMA radio communication with the mobile station.
[0039]
According to the above invention, in addition to the above effects, when performing W-CDMA wireless communication, wireless resources can be used efficiently.
[0040]
The radio resource allocation method for a radio base station apparatus according to the present invention may further comprise a baseband signal processing unit including a plurality of radio resources for performing radio communication with the mobile station, and a mobile station performing communication via the radio resources. A radio base station apparatus comprising: a resource allocation processing unit that performs an allocation process of allocating the radio resource to a requested call and an allocation change process of changing an allocation of a radio resource to a call to which the radio resource is allocated. A wireless resource allocation method, wherein a processing load measuring step of measuring a processing load of the resource allocation processing unit, and a processing load of the resource allocation processing unit measured in the processing load measuring step is larger than a predetermined value. A control step of ending the allocation change processing performed by the resource allocation processing unit. It is characterized in.
[0041]
According to the above invention, when the processing load of the resource allocation processing unit is large, the allocation change processing is terminated, so that the processing load of the resource allocation processing unit increases during the allocation change processing, and the allocation change processing becomes complicated. It can be prevented.
[0042]
Also, the radio resource allocation method of the radio base station apparatus according to the present invention is the radio resource allocation method of the radio base station apparatus, wherein the resource allocation processing unit stores an upper limit value of the number of radio resources whose allocation is changed to an upper limit storage unit. And an allocation change processing execution step of executing the allocation change processing as an upper limit of the number of radio resources whose allocation is changed by the resource allocation processing unit as an upper limit stored in the upper limit storage unit. Is further included.
[0043]
According to the above invention, in addition to the same effects as described above, since the upper limit of the number of radio resources to be changed is determined, the number of radio resources to be changed is increased. It is possible to prevent the processing load from increasing and the assignment change processing from becoming complicated.
[0044]
Also, the radio resource allocation method of the radio base station apparatus according to the present invention is the radio resource allocation method of the radio base station apparatus, wherein the radio resource performs W-CDMA radio communication with the mobile station. I do.
[0045]
According to the above invention, in addition to the above effects, when performing W-CDMA wireless communication, wireless resources can be used efficiently.
[0046]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described based on an example shown in the drawings.
[0047]
FIG. 1 is a block diagram showing a mobile communication system including a wireless base station device according to one embodiment of the present invention.
[0048]
In FIG. 1, the mobile communication system includes a wireless base station device 1 and a plurality of mobile stations 2 such as mobile phones that are wireless communication partners of the wireless base station device 1.
[0049]
The wireless base station device 1 includes a communication function unit 11, a communication setting unit 12, a load measurement unit 13, a threshold storage unit 14, a threshold setting unit 15, a comparison unit 16, and a relocation resource number upper limit storage unit. 17, a relocation resource number upper limit setting unit 18 and an antenna 19.
[0050]
The communication function unit 11 as a baseband signal processing unit includes baseband cards 111 to 11n as baseband signal processing means for performing baseband signal processing. Note that n is a natural number.
[0051]
Each of the baseband cards 111 to 11n communicates with the mobile station 2 by performing baseband signal processing.
[0052]
The baseband signal processing performed by the plurality of baseband cards 111 to 11n is a process of demodulating and decoding a received signal received from a mobile station, and encoding and modulating a transmission signal to be transmitted to the mobile station.
[0053]
Each of the baseband cards 111 to 11n is provided with a serial number increasing from 1 to 1. In this embodiment, it is assumed that the serial numbers are the last digit numbers 111 to 11n attached to each baseband card.
[0054]
FIG. 2 is a block diagram showing a plurality of baseband cards 111 to 11n.
[0055]
As shown in FIG. 2, each of the baseband cards 111 to 11n includes resources 1101 to 1107 as a plurality of radio resources for performing baseband signal processing.
[0056]
In this embodiment, the number of resources included in one baseband card is seven, but the number of resources included in one baseband card is not limited to seven and can be changed as appropriate.
[0057]
Each of the resources 1101 to 1107 performs radio communication with the mobile station 2 by demodulating and decoding a received signal received from the mobile station 2 and encoding and modulating a transmission signal to be transmitted to the mobile station 2. For example, each of the resources 1101 to 110M is a group of circuits configured with various circuits for performing transmission / reception signal processing unique to W-CDMA as baseband signal processing.
[0058]
Each of the resources 1101 to 1107 can operate independently.
[0059]
Returning to FIG. 1, the communication setting unit 12 as a resource allocation processing unit includes a base station control unit 121 and a resource allocation unit 122.
[0060]
The base station control unit 121 receives the call requested by the mobile station 2. Further, upon receiving the call requested by the mobile station 2, the base station control section 121 operates the resource allocating section 122.
[0061]
The resource allocating unit 122, which also functions as a resource allocating unit, converts a baseband card among the baseband cards 111 to 11n that has a vacant number of resources required by the call received by the base station control unit 121 to the baseband. Search among cards 111 to 11n.
[0062]
The resource allocating unit 122 allocates an available resource of the found baseband card to the call received by the base station control unit 121.
[0063]
The actual resource allocation process performed by the resource allocation unit 122 searches the baseband cards 111 to 11n for baseband cards in which resources equal to or greater than the number of resources required for the received call are continuously available. Then, a process is performed to allocate consecutive free resources of the baseband card found by the search to the received call.
[0064]
When the call to which the resource is allocated is disconnected, the resource allocation unit 122 releases the allocation of the disconnected call to the resource.
[0065]
After releasing the allocation of the disconnected call to the resource, the resource allocating unit 122 performs a rearrangement process of collecting the resources allocated to the existing call without being disconnected into one baseband card as much as possible.
[0066]
The load measuring unit 13 measures the processing load of the communication setting unit 12 and outputs the measured processing load value to the comparing unit 16. In the present embodiment, the processing load rate of the communication setting unit 12 is used as the processing load of the communication setting unit 12 measured by the load measuring unit 13.
[0067]
Note that the processing load of the communication setting unit 12 measured by the load measuring unit 13 may be the entire processing load ratio of the communication setting unit 12 including the base station control unit 121 and the resource allocating unit 122, or the resource allocating unit 122 May be used as the processing load factor.
[0068]
The threshold storage unit 14 stores a threshold for the comparison unit 16 to compare with the processing load value output from the load measurement unit 13. In this embodiment, the processing load ratio is used as the threshold. The threshold stored in the threshold storage unit 14 is set by the threshold setting unit 15.
[0069]
The comparison unit 16 serving as a control unit compares the processing load value output from the load measurement unit 13 with the threshold value stored in the threshold value storage unit 14, and compares the comparison result with the communication setting unit 12, specifically the resource Output to the allocating unit 122.
[0070]
The comparison unit 16 controls a relocation process as an assignment change process performed by the resource assignment unit 122 based on the processing load value output from the load measurement unit 13. Specifically, the comparison unit 16 continues the allocation change process performed by the resource allocation unit 122 based on the comparison result between the processing load value output from the load measurement unit 13 and the threshold stored in the threshold storage unit 14. Control whether to quit.
[0071]
When the comparing unit 16 outputs to the communication setting unit 12 a comparison result indicating that the processing load of the communication setting unit 12 measured by the load measuring unit 13 exceeds the threshold stored in the threshold storage unit 14, the resource allocation unit 122 ends the relocation processing.
[0072]
When the comparison unit 16 outputs a comparison result indicating that the processing load of the communication setting unit 12 measured by the load measuring unit 13 does not exceed the threshold stored in the threshold storage unit 14 to the communication setting unit 12, the resource allocation unit 122 continues the relocation processing.
[0073]
The relocation resource number upper limit storage unit 17 stores the upper limit of the number of resources for which the relocation processing is performed.
[0074]
The upper limit value of the number of resources stored in the relocation resource upper limit storage unit 17 is set by the relocation resource upper limit setting unit 18.
[0075]
The communication setting unit 12, the load measurement unit 13, the threshold storage unit 14, the comparison unit 16, and the relocation resource upper limit storage unit 17 are each a computer having a processor and a memory storing an operation program of the processor. 101. In this case, the communication setting unit 12, the load measurement unit 13, and the comparison unit 16 correspond to the functions of the processor, and the threshold storage unit 14 and the relocation resource upper limit storage unit 17 correspond to the memory. It becomes.
[0076]
Next, the operation will be described.
[0077]
First, the operation of the allocation process for allocating the resources of the baseband card to the call requested by the mobile station 2 will be described.
[0078]
Upon receiving the call requested by the mobile station 2 from the antenna 19, the base station control unit 121 operates the resource allocation unit 122.
[0079]
The resource allocating unit 122 searches the baseband cards 111 to 11n for a baseband card in which the number of resources required by the call received by the base station control unit 121 is free.
[0080]
An example of a search for a baseband card in which the number of resources required by the call received by the base station control unit 121 is free is shown below.
[0081]
The resource allocating unit 122 sequentially searches the baseband cards in ascending order of the serial number attached to each baseband card, and the number of resources required by the call received by the base station control unit 121 continues. When a free baseband card is found by the search, the base station control unit 121 allocates a free resource of the found baseband card to the call received.
[0082]
Even if the resource allocation unit 122 searches up to the baseband card with the largest serial number, if the number of resources required by the call received by the base station control unit 121 is not continuously free, the resource allocation unit 122 does not allocate. The allocation process ends as possible.
[0083]
Next, a description will be given of an operation of a process of releasing allocation of resources to a call disconnected in response to a disconnection of a call to which resources are allocated, and a relocation process performed in response to release of the allocation.
[0084]
FIG. 3 is a flowchart for explaining the operations of the process of releasing the allocation to the resources and the process of the reallocation. Hereinafter, description will be made with reference to FIG.
[0085]
When the call to which the resource is allocated is disconnected, the resource allocating unit 122 releases the allocation of the disconnected call to the resource (step 3a).
[0086]
When the release of the resource to the disconnected call is completed, the resource allocating unit 122 sets the baseband card having the released resource as the target card, and the target card is not disconnected and still exists. The number of resources allocated to the call is calculated (step 3b).
[0087]
Explaining step 3b in detail, the resource allocating unit 122 calculates the number of existing calls that have not been disconnected in the target card and the number of resources allocated to each call.
[0088]
The resource allocating unit 122 checks whether any baseband card other than the target card has a free resource (step 3c).
[0089]
If there is no baseband card having an empty resource except for the target card, the resource allocating unit 122 determines that the resources allocated in the target card are not cut off and exist in the target card so that the resources allocated in the target card are collected. An assignment change process is performed to relocate resources assigned to the current call within the same target card (step 3d).
[0090]
By performing the processing in step 3d, the free resources are collected in the target card. Therefore, even though the total number of free resources is larger than the number of resources required by the newly received call, the new received call This makes it possible to cope with the problem that a vacant resource cannot be allocated, so that resources can be used efficiently.
[0091]
In step 3d, the resource allocation unit 122 sets the upper limit of the number of resources to be relocated to the upper limit stored in the relocation resource upper limit storage unit 17.
[0092]
FIG. 4 is an explanatory diagram for explaining an assignment change process of rearranging within the same target card. 4, the same components as those in FIG. 2 are denoted by the same reference numerals. Also, in FIG. 4, the hatched resources indicate resources allocated to the call.
[0093]
FIG. 4A shows that, in the baseband card 111, the call to which the resource 1101 and the resource 1102 have been allocated is disconnected, the resource 1101 and the resource 1102 are released, and the call is allocated to the resource 1103 and the resource 1104. It is a figure showing a state where exists.
[0094]
FIG. 4B is a diagram showing a state in which the allocation change processing for rearranging resources in the same target card has been performed on FIG. 4A.
[0095]
In FIG. 4B, rearrangement is performed in the baseband card 111 in FIG. 4A in which the assignment of the call assigned to the resource 1103 and the resource 1104 is changed to the resource 1101 and the resource 1102. Due to this rearrangement, the number of consecutive free resources in the baseband card 111 becomes five.
[0096]
The load measuring unit 13 measures the processing load of the communication setting unit 12 while step 3d is being executed, and outputs the measured processing load value to the comparing unit 16.
[0097]
The comparison unit 16 compares the processing load value output from the load measurement unit 13 with the threshold stored in the threshold storage unit 14 and outputs the comparison result to the communication setting unit 12.
[0098]
During the execution of step 3d, the resource allocating unit 122 included in the communication setting unit 12 determines whether the relocation processing of step 3d is to be continued or the relocation processing of step 3d is to be terminated by the comparison unit 16 that outputs the determination. Continue based on the results.
[0099]
Specifically, when a comparison result indicating that the processing load of the communication setting unit 12 measured by the load measuring unit 13 does not exceed the threshold is output to the communication setting unit 12, the resource allocating unit 122 repeats Step 3d. Continue the placement process. When a comparison result indicating that the processing load of the communication setting unit 12 measured by the load measuring unit 13 exceeds the threshold is output to the communication setting unit 12, the resource allocation unit 122 performs the relocation processing in step 3d. finish.
[0100]
In this embodiment, when the resource allocating unit 122 executes the resource allocation changing process in the same baseband card, the resource allocating unit 122 performs the process based on the processing load of the communication setting unit 12 measured by the load measuring unit 13. Since the assignment change process is controlled, the assignment change process can be terminated when the processing load of the resource assignment unit 122 is large, and the processing load of the communication setting unit 12 increases during the assignment change process, making the assignment change process complicated. Can be prevented.
[0101]
In addition, since the assignment change process can be prevented from being complicated, it is possible to prevent the execution time of the assignment change process from being lengthened. Therefore, for example, when a new call is received during the execution of the assignment change process, the execution time of the assignment change process does not become long, so that the resource is assigned to the new call after accepting the new call. It is possible to prevent the time until the end is lengthened.
[0102]
In the present embodiment, when the resource allocating unit 122 executes the allocation changing process in the same baseband card, the upper limit value of the number of wireless resources whose allocation is to be changed is determined, and the measurement is performed by the load measuring unit 13. Since the allocation change processing performed by the resource allocation unit 122 is controlled based on the processing load of the communication setting unit 12, it is possible to prevent the processing load of the communication setting unit 12 from increasing during the allocation change processing and making the allocation change processing complicated. Become.
[0103]
When step 3d ends, the resource allocation unit 122 ends the resource relocation processing (step 3e).
[0104]
In step 3c, if any of the baseband cards excluding the target card has free resources, the resource allocating unit 122 changes the target card to the baseband card with the lowest serial number (step 3f). .
[0105]
The resource allocating unit 122 includes, for the baseband card having resources allocated to the disconnected call, any one of the number of resources allocated to each existing call that has not been disconnected yet. It is confirmed whether or not there is a continuation of free resources in the target card changed in step 3f (step 3g).
[0106]
In step 3g, if there is only one existing call that has not been disconnected in the baseband card having the resources allocated to the disconnected call, it is allocated to that call. Check if there are consecutive free resources that are equal to or greater than the number of resources.
[0107]
If the resource allocation unit 122 determines in step 3g that the changed target card has a free resource, the resource allocation unit 122 changes the resource allocated to the existing call that can be changed to the free resource to the free resource. A relocation process is performed as an assignment change process (step 3h).
[0108]
In step 3h, the resource allocation unit 122 sets the upper limit value of the number of resources to be relocated to the upper limit value stored in the relocation resource number upper limit storage unit 17.
[0109]
By performing the processing in step 3h, the free resources are collected, so that the total number of free resources is larger than the number of resources required by the newly received call, but is free for the newly received call. The problem that resources cannot be allocated can be dealt with, and resources can be used efficiently.
[0110]
FIG. 5 is an explanatory diagram for explaining an assignment change process for relocating resources among a plurality of baseband cards. 5, the same components as those in FIG. 2 are denoted by the same reference numerals. Further, in FIG. 5, the hatched resources indicate resources allocated to the call.
[0111]
FIG. 5A shows that all resources of the baseband card 111 are free resources, and in the baseband card 112, the call to which the resource 1101 has been allocated is disconnected and the allocation of the resource 1101 is released. FIG. 11 is a diagram showing a state in which assignments to resources 1102, 1103, and 1104 exist.
[0112]
FIG. 5B is a diagram illustrating a state in which an allocation change process of relocating resources allocated to the baseband card 112 illustrated in FIG. 5A to resources of the baseband card 111 has been performed.
[0113]
FIG. 5 (b) shows a case where the allocation of the call allocated to the resource 1102 and the resource 1103 and the resource 1104 in the baseband card 112 as shown in FIG. Relocation for changing to the resource 1102 and the resource 1103 has been performed. Due to this rearrangement, the number of consecutive free resources in the baseband card 112 becomes seven.
[0114]
The load measuring unit 13 measures the processing load of the communication setting unit 12 while step 3h is being executed, and outputs the measured processing load value to the comparing unit 16.
[0115]
The comparison unit 16 compares the processing load value output from the load measurement unit 13 with the threshold stored in the threshold storage unit 14 and outputs the comparison result to the communication setting unit 12.
[0116]
During the execution of step 3h, the resource allocating unit 122 included in the communication setting unit 12 determines whether the relocation processing of step 3h is to be continued or the relocation processing of step 3h is to be terminated by the comparison unit 16 that outputs the determination. Continue based on the results.
[0117]
Specifically, when a comparison result indicating that the processing load of the communication setting unit 12 measured by the load measuring unit 13 does not exceed the threshold is output to the communication setting unit 12, the resource allocating unit 122 restarts step 3h. Continue the placement process. When a comparison result indicating that the processing load of the communication setting unit 12 measured by the load measuring unit 13 exceeds the threshold is output to the communication setting unit 12, the resource allocation unit 122 performs the relocation processing in step 3h. finish.
[0118]
In the present embodiment, when the resource allocating unit 122 executes the process of changing the resource allocation between a plurality of baseband cards, the resource allocating unit 122 performs processing based on the processing load of the communication setting unit 12 measured by the load measuring unit 13. Since the resource allocation change processing to be performed is controlled, the allocation change processing can be terminated when the processing load of the resource allocation unit 122 is large, and the processing load of the communication setting unit 12 increases during the allocation change processing, resulting in the allocation change processing. Can be prevented from becoming complicated.
[0119]
In addition, since the assignment change process can be prevented from being complicated, it is possible to prevent the execution time of the assignment change process from being lengthened. Therefore, for example, when a new call is received during the execution of the assignment change process, the execution time of the assignment change process does not become long, so that the resource is assigned to the new call after accepting the new call. It is possible to prevent the time until the end is lengthened.
[0120]
In the present embodiment, when the resource allocation unit 122 executes the resource allocation change processing among a plurality of baseband cards, the upper limit value of the number of wireless resources whose allocation is to be changed is determined, and the load measurement unit 13 Since the allocation change processing performed by the resource allocation unit 122 is controlled based on the measured processing load of the communication setting unit 12, it is possible to prevent the processing load of the communication setting unit 12 from being increased during the allocation change processing, thereby making the allocation change processing complicated. It becomes possible.
[0121]
In this embodiment, the upper limit of the number of resources to be relocated is determined by the number of relocated resources in the same card relocation performed by the resource allocator 122 and the relocation between a plurality of cards performed by the resource allocator 122. Since both the upper limit values stored in the upper limit value storage unit 17 are used, the upper limit value of the number of relocation resources in the same card relocation process and the number of relocation resources in the relocation process among a plurality of cards are determined. The operation of setting the upper limit can be simplified as compared with the case where the upper limit is set individually.
[0122]
In the wireless base station apparatus of the W-CDMA system, the number of resources required for one call varies depending on the type of call, and the frequency of performing the assignment change processing may increase. Since the allocation change processing is controlled based on the measured processing load of the communication setting unit 12, it is possible to prevent the allocation change processing from being complicated, and the processing load of the communication setting unit 12 is reduced even if the frequency of the allocation change processing increases. It can be prevented from becoming complicated.
[0123]
The resource allocating unit 122 counts the number of executions of the relocation processing in Step 3h, and when the count value reaches a predetermined number (Step 3i), ends the resource relocation processing (Step 3e). In addition, when the count value indicating the number of times the relocation process has been performed has not reached the predetermined number (step 3i), the resource allocation unit 122 returns to step 3f.
[0124]
In step 3g, the baseband card having resources allocated for the disconnected call continues at least one of the number of resources allocated for each existing call that has not been disconnected yet. If there is no unused resource in the target card changed in step 3f, the resource allocating unit 122 changes the target card to a baseband card having a serial number larger by 1 than the current target card (step 3j), and proceeds to step 3g. move on.
[0125]
In the embodiments described above, the illustrated configuration is merely an example, and the present invention is not limited to the configuration.
[0126]
For example, as the load measuring unit 13, a load measuring unit that notifies a higher-level mobile communication control device of the processing load of the wireless base station device may be used. In this case, the processing load value measured by the load measuring unit can be used both for notifying the higher-level mobile communication control device and controlling the communication setting unit 12.
[0127]
【The invention's effect】
According to the present invention, the allocation change processing is terminated when the processing load of the resource allocation processing unit is large, so that the processing load of the resource allocation processing unit is reduced during the allocation change processing, which is processing for efficiently using wireless resources. It is possible to prevent the assignment change processing from becoming complicated and becoming complicated.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a mobile communication system including a wireless base station device according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram for explaining a communication function unit of the wireless base station device according to the embodiment;
FIG. 3 is a flowchart for explaining an operation of the wireless base station device of the embodiment.
FIG. 4 is an explanatory diagram illustrating an assignment change process according to the embodiment;
FIG. 5 is an explanatory diagram for explaining another assignment change process according to the embodiment;
[Explanation of symbols]
1 wireless base station device
11 Communication function part
111-11n baseband card
1101-1107 resources
12 Communication setting section
121 base station controller
122 Resource Allocator
13 Load measurement section
14 Threshold storage unit
15 Threshold setting section
16 Comparison section
17 Relocation resource upper limit storage
18 Relocation resource number upper limit setting unit
19 Antenna
101 Computer
2 mobile stations

Claims (6)

A baseband signal processing unit including a plurality of radio resources for performing radio communication with the mobile station,
An allocation process of allocating the radio resource to a call requested by a mobile station communicating via the radio resource, and an allocation change process of changing the allocation of the radio resource to the call to which the radio resource is allocated. A resource allocation processing unit to perform;
A processing load measuring unit that measures a processing load of the resource allocation processing unit,
A control unit for terminating an allocation change process performed by the resource allocation processing unit when the processing load of the resource allocation processing unit measured by the processing load measurement unit is larger than a predetermined value. apparatus. The wireless base station device according to claim 1,
The resource allocation processing unit further includes an upper limit value storage unit that stores an upper limit value of the number of radio resources whose allocation is changed,
The radio base station apparatus, wherein the resource allocation processing unit sets an upper limit value of the number of radio resources whose allocation is changed at the time of executing the allocation change process to an upper limit value stored in the upper limit value storage unit. 3. The radio base station apparatus according to claim 1, wherein the radio resources perform W-CDMA radio communication with the mobile station. A baseband signal processing unit including a plurality of radio resources for performing radio communication with a mobile station, and an allocation process of allocating the radio resources to a call requested by a mobile station communicating via the radio resources; A radio resource allocation method for a radio base station device, comprising: a resource allocation processing unit that performs an allocation change process of changing a radio resource allocation for a call to which a radio resource is allocated.
A processing load measuring step of measuring a processing load of the resource allocation processing unit,
A control step of terminating an allocation change process performed by the resource allocation processing unit when the processing load of the resource allocation processing unit measured in the processing load measurement step is larger than a predetermined value. A radio resource allocation method for the device. The radio resource allocation method for a radio base station device according to claim 4,
A storage step of storing the upper limit of the number of radio resources for which the resource allocation processing unit changes the allocation in an upper limit storage unit,
An allocation change process execution step of executing the allocation change process with the upper limit value of the number of radio resources whose allocation is changed by the resource allocation processing unit as an upper limit value stored in the upper limit value storage unit. Wireless resource allocation method for a wireless base station apparatus to perform. 6. The radio resource allocation method for a radio base station device according to claim 4, wherein the radio resource performs W-CDMA radio communication with the mobile station. Method.

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