JP2004208179A - Radio resource management device - Google Patents

Abstract

A wireless base station device in which there is a trade-off between improvement in call accommodating efficiency and concentration of load on a specific lower card can achieve high call accommodating efficiency while preventing overload on a specific lower card. A wireless resource management device is provided.
In a radio resource management device for setting radio resources to a plurality of lower cards 3-1 to 3-n for which radio resources are to be set, a setting position for setting radio resources for a new call to the plurality of lower cards. A radio resource setting position selecting means 6 for determining the setting of a new resource, and an overload determining means 5 for determining whether a new call can be set to the plurality of lower cards. According to the output of both, the setting for the lower card of the new call is executed.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a radio resource management device that efficiently sets and manages radio resources. The radio resources to be used in the present invention include a DSP processing capability, a transmission buffer, a time slot, and the like.
[0002]
[Prior art]
In the conventional radio resource management method, for example, in a radio base station that handles a plurality of services such as voice and packet, when a new call occurs, the amount of radio resources required for the new call to communicate with the entire base station is Despite the existence, the resource setting of the new call may not be performed.
[0003]
Such an example will be described below. For example, when the radio resource set for communication of a voice call is set to 1, there is a radio base station apparatus composed of four cards capable of accommodating 8 radio resources. If the resources of 6, 8, 7, and 5 are already set in the call / channel conversion means for executing the conversion means of (i), the free resource amounts of the lower cards are 2, 0, 1, and 3, respectively. This means that a total of 6 radio resources remain for the entire base station.
[0004]
Here, when a packet service requiring four radio resources is generated as a new call, although the base station as a whole has six radio resources remaining, the lower card having four radio resources remains one. Since there is no packet service, the packet service cannot be set.
[0005]
As a conventional radio resource management method for this kind of problem, there is a method described in Japanese Patent Application Laid-Open No. 2001-285480 (Patent Document 1). This conventional radio resource management method accommodates calls so that resources are unevenly distributed to specific cards based on information on resource use status, thereby improving call accommodation efficiency.
[0006]
[Patent Document 1]
JP 2001-285480 A
[Problems to be solved by the invention]
In a mobile communication system such as the W-CDMA system, the number of terminals that can be accommodated is greatly increased as compared with a conventional system, so that it is expected that the number of requests for new call setting and location registration will increase. Furthermore, in order to reduce the number of terminals in a non-communication state and efficiently use wireless resources, it is expected that a request for changing the transmission rate during data communication will be accepted with high frequency.
[0008]
Therefore, it is expected that the resource setting / release processing is performed at a high frequency in the radio base station. However, in the above-described conventional method, the call is set so that the radio resources are unevenly distributed to a specific lower card. The resource setting for the specific lower card is concentrated, and the communication between the call control unit and the lower card and the load on the lower card itself increase.
[0009]
For this reason, for example, when a large number of calls occur instantaneously, the communication traffic between the call control unit and the specific lower card and the processing load of the specific lower card become excessive, and the processing capacity and the processing capacity of the other lower cards are increased. Despite the remaining radio resources, there is a possibility that communication quality may be degraded such as a delay in connection response or a failure in radio resource setting.
[0010]
The present invention has been made in view of such a point, and an object of the present invention is to provide a radio base station apparatus in which there is a trade-off relationship between improvement in call accommodating efficiency and concentration of a load on a specific lower-order card. It is an object of the present invention to provide a radio resource management device capable of obtaining high call accommodation efficiency while preventing an overload on a card.
[0011]
[Means for Solving the Problems]
A radio resource management device according to the present invention is a radio resource management device for setting radio resources to a plurality of lower cards for which radio resources are to be set, and a setting position for setting radio resources for a new call to the plurality of lower cards. Radio resource setting position selecting means for determining, and overload determining means for determining whether or not setting of a new call to the plurality of lower cards, comprising, the radio resource setting position selecting means and the overload determining means, The setting for the lower card of the new call is executed in accordance with the output of both. With this configuration, it is possible to obtain a radio resource management device that can achieve high call accommodation efficiency while preventing an overload on a specific lower card.
[0012]
Further, even if the radio resource setting position selecting means selects the setting of a new call for the lower card, the overload determining means sets the lower card based on the total radio resource amount of the lower card. Comparing the amount of available radio resources, which is a value obtained by subtracting the total value of the amount of radio resources requested by the current call, with the amount of radio resources requested by the new call, and determining that the amount of available resources is equal to the request of the new call. It is characterized in that a new call is not set to a lower card determined to be less than the resource amount to be used. With this configuration, it is possible to increase the accommodation efficiency of radio resources while avoiding the risk of overload.
[0013]
Further, the radio resource setting position selecting means includes a radio resource setting information management unit, and when a new call occurs, the radio resource setting information selecting unit determines the amount of radio resources available for each lower card and the amount of radio resources requested by the new call. In comparison, a lower card with the least remaining radio resource amount is preferentially selected from among cards whose available resource amount is equal to or more than the resource amount requested by the new call. This configuration enables rational management of radio resources.
[0014]
Further, the overload determination means stores the number of times a wireless resource is set to each lower card in a unit time in the load information management unit for each lower card, and determines whether the frequency at which the wireless resource is set is predetermined. When the threshold value is exceeded, the lower card is recorded as an overload state in the load information management unit. With this configuration, it is possible to prevent wireless resources from being allocated only to specific lower cards.
[0015]
Further, the overload determination means stores the number of times radio resources are released to the lower card in a unit time in the load information management unit for each lower card, and the frequency at which the radio resources are released is a predetermined threshold. When the value becomes equal to or less than the value, the fact that the overload state of the lower card has been resolved is recorded in the load information management unit. With this configuration, management can be performed according to both the frequency of setting and release of the radio resource, and more rational management can be performed.
[0016]
The lower card may be in an overloaded state via the overload determining means when a load amount for setting and releasing a radio resource exceeds a predetermined threshold. Is recorded in the load information management unit. With this configuration, it is possible to determine the overload based on the load on the lower card.
[0017]
Further, the load amount is calculated according to the number of tasks processed by the lower card. With this configuration, it is possible to determine overload based on the number of tasks in the lower card.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a system configuration of a radio resource management device according to an embodiment of the present invention. The radio base station apparatus 1 has a card group (3-1 to 3-n) that accommodates the radio resources 3, and the call control unit includes the radio resource management unit 2 and the radio resource setting position selection unit 6 (wireless In this system, the wireless resources of the lower card are set in cooperation with the resource setting information management unit 7) and the overload determination unit 5 (including the load information management unit 4).
[0019]
When a new call is generated, the radio resource management means 2 calculates the amount of radio resources required for setting from the control information of the new call, and sends the radio resources to the lower card selected by the radio resource setting position selecting means 6. Set up resources.
[0020]
However, when the lower card selected by the radio resource setting position selecting means 6 is prohibited from setting the new call by the overload judging means 5, the radio resource setting is not performed.
[0021]
FIG. 2 is a flowchart showing a procedure of wireless resource setting according to the present embodiment. When a new call a00 has occurred (occurred) (step 201), the radio resource management means 2 calculates a radio resource amount r00 required for setting the new call a00 from the control information of the new call a00 (step 202). ).
[0022]
Next, the radio resource management means 2 presents the radio release amount r00 to the radio resource setting position selecting means 6 and selects and acquires the setting card candidate c00 for the new call a00 (step 203). Then, it is determined whether or not the selection in step 203 has been successful (step 204).
[0023]
If the determination in step 204 is NO (if there is no configuration card candidate), it is determined that the wireless resource cannot be set, and the process is terminated (END) as a call loss (step 208). On the other hand, if the determination in step 204 is YES (if there is a setting card candidate), information on the setting card candidate c00 is presented to the overload determining means 5 (step 205).
[0024]
Then, it is determined whether wireless resource setting can be performed for the setting card candidate c00 presented in step 205 (step 206). If the determination in step 206 is NO (if the radio resource setting is rejected by the overload judging means), the process returns to step 203 and presents the new setting card candidate b00 to the radio resource setting position selecting means again. , And the above-described processing is repeated to acquire a new radio resource setting position.
[0025]
If the determination in step 206 is YES (if wireless resource setting is permitted), the call processing unit (not shown) sets a new call a00 in the setting card c00 and ends the process (END) (step 207).
[0026]
Next, selection of a radio resource setting position by the radio resource setting position selecting means 6 will be described. FIG. 3 is a flowchart showing a procedure for selecting a radio resource setting position.
[0027]
Upon receiving the information on the new call a00 from the radio resource management means 2, the radio resource setting position selecting means 6 subtracts the total value of the calls set in the lower card from the total radio resource amount of the lower card. Are selected in ascending order of the remaining wireless resource amount (step 301).
[0028]
Then, it is determined whether or not the lower card has been successfully selected in the processing in step 301 (step 302). If the determination in step 302 is NO, the wireless resource management unit 2 is notified that the lower-level card has failed to be selected, and the process ends (step 306). If the determination in step 302 is YES, verification is made as to whether or not the selected lower card c00 can accommodate the new call a00 (step 303, step 304).
[0029]
If the determination in step 304 is NO, the process returns to step 301 and repeats the above-described processing. On the other hand, if the determination in step 304 is YES, the selected lower card c00 is notified to the wireless resource management unit 2 as a wireless resource setting target, and the process ends (step 305).
[0030]
The lower card for which the call a00 has already been determined not to be accommodated and the lower card for which the setting of the call a00 has been rejected by the overload determining means are not selected.
[0031]
If there is no lower card that can be selected, the lower resource card selection failure is notified to the radio resource management unit 2. When there is a selectable lower card, the remaining radio resource amount of the lower card is compared with the radio resource amount b00 requested by the call a00, and it is determined whether the call a00 can be set to the selected lower card. If the call a00 cannot be set, the lower card selection is repeated.
[0032]
When the call a00 can be set, the selected lower card is notified to the radio resource management means 2 as the radio resource setting target c00.
[0033]
Next, a description will be given of a method of determining a load situation in the overload determining means 5. FIG. 4 is a flowchart illustrating the procedure of the load state determination method.
[0034]
Upon receiving the information of the lower card c00, the overload determining means 5 acquires the overload information recorded in the load information management unit 4 (Step 401).
[0035]
Then, based on the obtained overload information, it is determined whether or not the lower card c00 is in an overload state (step 402). If the determination in step 402 is YES (the lower card c00 is in an overloaded state), the wireless resource management unit 2 is notified that the setting of the wireless resource for the lower card c00 is prohibited, and the process ends (step 404). .
[0036]
If the determination in step 402 is NO (not in an overloaded state), the wireless resource management unit 2 is notified that the wireless resource setting to the lower card c00 is permitted, and the process ends (step 403).
[0037]
Here, a first example regarding the information updating means of the load information management unit 4 will be described with reference to FIGS. FIG. 5 is a flowchart showing a procedure for updating load information when a new call a00 is set in the lower card cn.
[0038]
In FIG. 5, dn is a count value of a counter for judging a load amount, and exists for each lower card. This count value is counted (incremented) by one each time a radio resource is set in the lower card.
[0039]
First, a new call a00 is set in the lower card cn (step 501). Then, the count value dn of the counter corresponding to the lower card cn is obtained (step 502).
[0040]
When a new call a00 is issued, the count value dn corresponding to the new call a00 is incremented by 1 (step 503). Next, it is determined whether or not the count value dn incremented in step 503 exceeds a predetermined threshold value th01 (step 504).
[0041]
If the determination in step 504 is YES (dn> th01), the load information management unit 4 is notified that the lower card cn is overloaded (step 505). On the other hand, if the determination in step 504 is NO (dn ≦ th01), the process ends.
[0042]
FIG. 6 is a flowchart showing a processing procedure for determining the elimination of the overload state. The processing in FIG. 6 is executed at regular intervals.
[0043]
In FIG. 6, the count value dn is counted (incremented) by one each time a radio resource is set in the lower card, and decremented by one each time a radio resource is released from the lower card.
[0044]
Specifically, the following determination processing is executed for counters corresponding to all lower cards cn (steps 601 to 607).
[0045]
In this case, the count value dn corresponding to the lower card cn is obtained (step 602). Then, it is determined whether or not the acquired count value dn is 0 or a negative value (dn ≦ 0) (step 603). If the determination in step 603 is YES (dn ≦ 0), processing is performed for the next lower card. On the other hand, if the determination in step 603 is NO (dn is a positive value, dn> 0), the count value dn is decremented (step 604).
[0046]
Then, it is determined whether or not the decremented count value dn exceeds the threshold value th02 (dn <th02) (step 605). If the determination in step 605 is YES (dn <th02), the load information management unit 4 is notified that the overload state of the lower card cn corresponding to the count value dn has been resolved (step 606). If the determination in step 605 is NO (dn ≧ th02), processing is performed for the next lower card. After performing the above steps for all lower cards, the process ends.
[0047]
The value of dn gradually increases when a new call occurs and the frequency of dn incremented by the processing of FIG. 5 becomes higher than the frequency of dn being decremented by the processing of FIG. I will. Then, when the value of dn exceeds the threshold th01, the lower card corresponding to dn is determined to be in an overloaded state.
[0048]
A second example of the information updating means of the load information management unit 4 will be described with reference to the flowchart of FIG. FIG. 7 is a flowchart showing a process of updating the load status information performed by the lower-level card cn when the lower-level card cn receives a control message (related to the process of setting and releasing the wireless resource).
[0049]
First, the lower card cn receives the control message (step 701). At this time, the number of tasks being processed by the lower card cn is counted, and the count value is set to tn (step 702). Then, it is determined whether or not the count value tn is equal to or larger than the threshold value th11 (tn ≧ th11) (step 703).
[0050]
If the determination in step 703 is YES (tn ≧ th11), the load information management unit 4 is notified that the card cn is in an overloaded state (step 704). On the other hand, if the determination in step 703 is NO (tn <th11), it is determined whether or not the count value tn is equal to or smaller than the threshold value th12 (tn ≦ th12) (step 705). If the determination in step 705 is YES (tn ≦ th12), the load information management unit 4 is notified that the lower card cn is not overloaded (step 706). On the other hand, if the determination in step 705 is NO (tn> th12), the process ends.
[0051]
According to the present embodiment, in the resource management of the wireless base station device, high call accommodation efficiency can be obtained while preventing an overload on a specific lower card.
[0052]
【The invention's effect】
As described above, according to the present invention, in a radio base station apparatus in which there is a trade-off relationship between improvement in call accommodating efficiency and concentration of load on a specific lower card, it is possible to prevent overload on a specific lower card. However, it is possible to provide a radio resource management device capable of obtaining high call accommodation efficiency.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a system configuration of a wireless resource management device according to an embodiment of the present invention. FIG. 2 is a flowchart illustrating a procedure of wireless resource setting according to the present embodiment. FIG. 4 is a flowchart showing a procedure for selecting a resource setting position. FIG. 4 is a flowchart showing a procedure for a load status determination method according to the present embodiment. FIG. 5 is a diagram showing an operation of updating load information according to the present embodiment. FIG. 6 is a flowchart showing a procedure for updating load information when the setting is set to FIG. 6. FIG. 6 is a flowchart showing a processing procedure for determining the elimination of an overload state as an operation of updating the load information according to the embodiment. As an operation of updating the load information according to the embodiment, when the lower-level card cn receives a control message, the lower-level card cn performs a process of updating load status information performed by the lower-level card cn. Over chart [Description of the code]
REFERENCE SIGNS LIST 1 radio base station apparatus 2 radio resource management means 3 radio resource 4 load information management section 5 overload determination means 6 radio resource setting position selection means 7 radio resource setting information management section

Claims (7)

A wireless resource management device that sets wireless resources to a plurality of lower cards for which wireless resources are to be set,
Radio resource setting position selecting means for determining a setting position to set a radio resource of a new call to the plurality of lower cards,
Overload determining means for determining whether a new call can be set to the plurality of lower cards,
A wireless resource management device, wherein setting is performed for a lower card of a new call in accordance with outputs of both the wireless resource setting position selecting means and the overload determining means. Even if the radio resource setting position selecting means selects a new call setting for the lower card, the overload determining means sets the lower card based on the total radio resource amount of the lower card. Compare the available radio resource amount, which is a value obtained by subtracting the total value of the radio resource amounts requested by the call, with the radio resource amount requested by the new call, and check that the available resource amount is the resource requested by the new call. The wireless resource management device according to claim 1, wherein a new call is not set to a lower card determined to be not more than the amount. The radio resource setting position selecting means includes a radio resource setting information management unit, and when a new call occurs, compares the available radio resource amount of each lower card with the radio resource amount requested by the new call. 3. The radio according to claim 1, wherein a lower card having the least remaining radio resource amount is preferentially selected from among cards whose available resource amount is equal to or more than the resource amount requested by the new call. Resource tube equipment. The overload determining means stores the number of times the radio resource is set to each lower card per unit time in the load information management unit for each lower card, and the frequency at which the radio resource is set is a predetermined threshold value. The wireless resource management device according to claim 1, wherein when the number exceeds the limit, the lower card is recorded in the load information management unit as an overload state. The overload determining means stores the number of times the wireless resource is released to the lower card in a unit time in the load information management unit for each lower card, and the frequency at which the wireless resource is released is equal to or less than a predetermined threshold. 5. The wireless resource management device according to claim 4, wherein when the condition is changed, the fact that the overload state of the lower card has been eliminated is recorded in a load information management unit. The lower card, via the overload judging means, when the load amount for the processing of setting and releasing the radio resource exceeds a predetermined threshold value, determines that the lower card is overloaded. The wireless resource management device according to claim 4, wherein the information is recorded in an information management unit. The wireless resource management device according to claim 6, wherein the load amount is calculated according to the number of tasks processed by the lower card.

Images