KR101387653B1 - Method and apparatus for controlling of inter system paging in a mobile communication system - Google Patents

Abstract

The present invention relates to a system-to-system paging control technique in a mobile communication system, and sets a threshold value according to a load rate of a mobile communication exchange (MSC), and when the load rate of an MSC exceeds a set threshold, inter-system paging for each base station in an MSC ( ISP) feature to selectively control. According to the present invention, the ISP can be paused or reactivated step by step according to the load ratio of the MSC, so that the ISP can be controlled according to the load ratio of the MSC.

Mobile communication system, MSC, base station, ISP (Inter System Paging)

Description

Method and device for inter-system paging control in mobile communication system {METHOD AND APPARATUS FOR CONTROLLING OF INTER SYSTEM PAGING IN A MOBILE COMMUNICATION SYSTEM}

The present invention relates to a technique for performing a paging service in a mobile communication system, and in particular, to pause and resume operation of an inter-system paging function (hereinafter referred to as an ISP) function according to an increase in load ratio in a mobile communication network. The present invention relates to an inter-system paging control method and apparatus in a mobile communication system suitable for controlling.

In general, because a mobile terminal moves to an unspecified area, paging fails when a terminating terminal requiring an incoming call from an arbitrary mobile communication terminal is located in a boundary area between several mobile switching centers (MSCs). Often happens.

In order to solve this problem, the ISP function has been developed as a method to improve the success rate of incoming calls in the boundary section between mobile communication exchanges.

Briefly describing the paging method using the ISP, the mobile terminal of the calling party receives the telephone number of the called terminal provided through the wireless network of the calling terminal and requests the location of the called terminal to the Home Location Register (HLR). Request a message and receive a location request response message from a home location register.

Accordingly, the calling mobile communication exchange performs local paging according to the location request response message, and if the local paging fails, it is determined that the current called terminal is located in the cell boundary area and neighboring mobile communication exchanges. Send an ISP request message to

When an ISP response message is received from neighboring mobile communication exchanges in response to the ISP request message, setup is performed between the calling mobile communication exchange and the neighboring mobile communication exchange and the call is connected.

In summary, when the ISP does not respond to the first paging at the border area of the mobile switching center, the ISP performs the second paging simultaneously with the base station included in the neighboring mobile switching system and the system that made the first paging. It will be improved.

Therefore, the ISP function increases the success rate of paging by increasing the paging success rate, but there is also a negative effect of increasing the load rate of the mobile communication exchange by using the ISP.

In this case, when the MSC load rate rises, an extreme case in which the MSC itself may be down due to a sudden increase in the load rate may occur, and thus preliminary control is required.

In the MSC according to the prior art operating as described above, the use of the ISP function can increase the paging success rate and allow the incoming to be better. However, when using the ISP function when the MSC load rate is increased, The use of the ISP function increases the MSC load rate, causing the MSC to crash or fail.

Accordingly, the present invention provides a method and apparatus for inter-system paging control in a mobile communication system that can control the use of the ISP on the base station according to the load ratio of the MSC.

In addition, the present invention is to set the threshold value for each load rate in the MSC, and through the interworking with the ISP function, the base station using the ISP according to the load rate of the MSC measured periodically to perform the pause and reactivation of the ISP function Provides a method and apparatus for inter-system paging control in a mobile communication system.

In addition, the present invention sets a threshold value for each load ratio in the mobile switching center, sets a rating according to the importance for each base station using the ISP, and temporarily stops the ISP function of the base station for each rating according to the load ratio of the mobile switching center periodically measured. The present invention provides a method and apparatus for inter-system paging control in a mobile communication system that can control the operation or reoperation.

In addition, the present invention, if the load rate of the mobile communication exchanger exceeds a specific threshold, the timer after running the timer for a predetermined time when the load rate of the mobile communication exchange is lower than a certain threshold in the state of controlling the ISP function of the base station Provides a method and apparatus for inter-system paging control in a mobile communication system capable of releasing ISP function control after completion.

According to an embodiment of the present invention, a process of setting a threshold value according to a load rate of a mobile communication exchange (MSC), and an inter-system paging (ISP) function for each base station in the MSC when the load rate of the MSC exceeds a set threshold value Selectively controlling the process.

On the other hand, the control process in the present invention, characterized in that for temporarily suspending the ISP function for each base station.

On the other hand, the control process in the present invention, characterized in that selectively off (Off) the ISP function for each base station.

According to another aspect of the present invention, when the load rate of the MSC exceeds the set threshold, and is less than or equal to the set threshold, driving the preset timer, and the load rate of the MSC does not exceed the set threshold again. Restoring the controlled ISP function when the timer expires in a non-existent state.

According to another embodiment of the present invention, a method of setting a threshold value according to an increase in a load rate of a mobile communication exchange (MSC) and registering a base station performing inter-system paging (ISP) in the MSC by setting a class according to importance level And, if the load rate of the MSC exceeds the second stage threshold, suspending the ISP function of the second-class base station, and the load rate of the MSC exceeds the first stage threshold set higher than the second stage threshold. In this case, the step of turning off the ISP function of all the base stations registered in the MSC (Off).

According to another aspect of the present invention, when the load rate of the MSC exceeds a threshold of each set step, and when the load rate of the MSC is less than or equal to the threshold of each step, a process of driving a preset timer, and the load rate of the MSC is set. Restoring the controlled ISP function when the timer expires while not exceeding a threshold again.

In one embodiment of the present invention, an apparatus includes an increase in a load rate generated when transmitting and receiving signals and data with at least one base station performing an inter-system paging (ISP) function, an adjacent mobile communication exchange (MSC), and the base station and mobile communication terminals. According to the MSC control unit to set the threshold value according to the step by step, and set the class according to the importance of each base station, and if the load ratio exceeds the set threshold, selectively controlling the ISP function of each base station under the control of the MSC control unit Includes MSC.

In addition, in the present invention, the MSC is characterized by selectively suspending the ISP function for each base station.

In the present invention, the MSC is characterized in that the ISP function for each base station selectively off (Off).

Meanwhile, in the present invention, when the MSC load rate is less than or equal to a predetermined threshold, the MSC controller drives a preset timer, and when the timer expires while the MSC load rate does not exceed the set threshold again. Restoring the controlled ISP function.

Meanwhile, in the present invention, when the MSC load rate exceeds the second level threshold, the MSC controller temporarily suspends the ISP function of the second-level base station having a higher importance than the third-level base station, and the MSC load rate is set to the second. When exceeding the first threshold set higher than the step threshold, it is characterized in that the ISP function of all the base stations registered in the MSC (Off).

In the present invention, effects obtained by representative ones of the disclosed inventions will be briefly described as follows.

According to the present invention, the ISP function can be temporarily paused or reactivated according to the MSC load rate. Therefore, the ISP function can be controlled according to the MSC load rate. The pause can reduce the MSC load rate.

Hereinafter, the operation principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, terms to be described below are terms defined in consideration of functions in the present invention, and may be changed according to intention or custom of a user or an operator. Therefore, the definition should be based on the contents throughout this specification.

According to the present invention, the mobile communication switch (hereinafter referred to as MSC) and the ISP interoperate with each other so as to temporarily stop and restart the ISP according to the load rate of the MSC periodically measured.

In this way, in order to control the ISP function according to the MSC load rate, by providing a threshold value according to the MSC load rate increase, if the threshold value is exceeded, the corresponding base station ISP function is controlled.

Specifically, for example, three thresholds are respectively set according to the MSC load rate, and when the MSC load rate exceeds the first threshold, the ISP is controlled so as not to use the ISP for the less important Class C base stations among the ISP base stations. . If the second threshold is exceeded, control the ISP to not use the ISP for class B and C base stations except for the class A base station, which is very important among ISP base stations.If the MSC load rate is exceeded until the third threshold, the ISP function is turned off. By turning OFF, the base station connected to the MSC whose load rate exceeds the third threshold is not used.

In addition, if the MSC load rate exceeds a certain threshold, the ISP function of the base station is controlled, and if the load rate of the mobile communication switch falls below a certain threshold, the timer function is controlled after the timer is completed after the timer is driven for a predetermined time. To turn it off.

1 is a diagram illustrating a structure for ISP control according to a preferred embodiment of the present invention.

Referring to FIG. 1, the MSC operator 100 performs operation and management of the MSC 105 and registers base stations capable of using an ISP function. In addition, the ISP function is controlled according to the load factor 125 of the MSC. In this case, the MSC operator 100 may be a control unit of the MSC, and may be configured to be connected to the MSC 105 as shown in FIG. 1, or may be configured to include the control unit of the MSC in the MSC 105.

The MSC 105 performs a call connection processing function of the mobile communication terminal and performs a location registration and handoff procedure of the mobile communication terminal. In addition, the MSC 105 receives the paging request signal of the mobile communication terminal from the base station and is driven to perform fast call processing by performing an ISP function for each base station.

The base stations 110, 115, and 120 are connected to the MSC 105, and perform signal processing, call processing, and data transmission and reception with mobile communication terminals included in the cell area within the base stations 110, 115, and 120. Paging can be performed using the ISP function.

When explaining the control procedure of the ISP according to the MSC load rate (125), the MSC operator 100 has a field for dividing the class for each ISP base station when registering the ISP base station, when dividing the ISP base station into at least two or more classes For example, it is divided into three levels, A, B, and C.

In addition, the threshold for each grade according to the load ratio 125 of the MSC is also divided into two or more stages, for example, a critical state 130, a major state 135, a minor state By setting the threshold of the three-step threshold of 140, if the future MSC load rate 125 exceeds the threshold, it is possible to take a selective action by the corresponding grade.

For example, the threshold of the minor state 140 may be set to 30%, the threshold of the major state 135 to 60%, and the threshold of the critical state 130 to 90%.

Subsequently, if the load ratio of the MSC exceeds the miner state 140 during the operation of the MSC 105, the ISP does not operate for the base station 120 corresponding to the class C among the ISP base stations. In addition, when the load factor 125 of the MSC exceeds the minor state 140 and exceeds the major state 135, the base station 120 corresponding to the C class which is not operated in advance among the ISP base stations, and the B class The ISP does not operate in the base station 115.

However, if the load rate 125 of the MSC exceeds the major state 135 and exceeds the critical state 130, the ISP function is paused or turned off to prevent the use of the ISP in the MSC 105.

2A to 2B are flowcharts illustrating an operation procedure for ISP control according to a preferred embodiment of the present invention.

First, referring to FIG. 2A, while the MSC controller or the MSC operator 100 normally operates the MSC 105 in step 200, the load rate 125 of the MSC does not exceed the threshold of the minor state 140 in step 202. In this case, the current state may be maintained, but if the load rate 125 of the MSC exceeds the preset state of the minor state 140, the flow proceeds to step 204 to count the timer.

That is, since the load ratio 125 of the MSC may exceed the threshold of the minor state 140 for a while and then lower than the threshold of the minor state 140 again, the timer is driven for a predetermined time, and the load ratio 125 of the MSC during the timer time. ) Only controls the ISP function of the specific base station when the threshold value of the miner state 140 is exceeded.

After that, it is determined whether the timer counted in step 206 reaches a preset time n. If the load rate 125 of the MSC maintains the state exceeding the threshold of the minor state 140 during the timer time, step 208. Proceeds to pause the ISP function of the C-level base station 120, the remaining base stations (110, 115) are driven to use the ISP function.

After the control of the ISP for each base station class in step 208, it is determined in step 210 whether the load factor 125 of the MSC is less than or equal to the threshold of the minor state 140. At this time, even after controlling the ISP, the load ratio 125 of the MSC may be smaller than the threshold value of the miner state 140. After checking this, the load ratio 125 of the MSC exceeds the threshold value of the miner state 140. If so, proceed to step 216.

On the other hand, when the timer counted in step 206 does not reach the preset time n, the load rate 125 of the MSC decreases by a predetermined amount again. In step 210, the load rate 125 of the MSC is in a minor state during the timer period. It is determined periodically whether or not it is less than or equal to the threshold of 140, and if the load ratio 125 of the MSC is less than the threshold of the minor state 140 proceeds to step 212 to drive the set timer.

In such a case, the load factor 125 of the MSC may again exceed the threshold of the minor state 140, and therefore, whether or not the load factor 125 of the MSC exceeds the threshold of the minor state 140 again for a preset m hour. In judgment, the timer is driven.

If the timer driven in step 212 reaches the preset time m, proceeds to step 214 to release or recover the pause command so that the ISP function suspended in the class C base station 120 is driven again, and returns to step 200. Again, the MSC 105 is controlled to be driven in the normal operating state.

However, when the timer driven in step 212 does not reach the preset time m, the MSC load rate 125 fluctuates more than a predetermined value, and the MSC load rate 125 again exceeds the threshold of the minor state 140. This can be the case. In such a case, the process returns to step 202 to determine again whether the MSC load factor 125 exceeds the threshold of the minor state 140.

That is, since the MSC load rate 125 may fluctuate periodically, after the MSC load rate 125 exceeds the corresponding threshold, the timer is driven to maintain the state in which the MSC load rate 125 exceeds the threshold for a preset time. Only if the ISP function is suspended and the MSC load rate 125 then falls below the threshold, then the timer is also driven again to keep the MSC load rate 125 below the threshold for a preset time. In other words, the control is to release or restore the pause of ISP function.

In this case, each timer time may be the same or different, and may have a different timer time for each base station class for each threshold.

On the other hand, when the load ratio 125 of the MSC exceeds the threshold of the minor state 140 in step 216, and exceeds the threshold of the major state 135, the flow proceeds to step 218 to count the timer. Thereafter, it is determined whether the timer counted in step 220 reaches a preset time n. If so, in step 222, the ISP function of the class C base station 120 is suspended, and the ISP of the class B base station 115 is suspended. It also pauses the function. However, other base stations (for example, class A base station 110) except for class B and class C base stations 115 and 120 are driven to continuously perform signal and data processing and call processing using an ISP function. .

After the control of the ISP for each base station class in step 222, it is determined in step 224 whether the load rate 125 of the MSC is less than or equal to the threshold of the miner state 140, and thus the threshold of the miner state 140 of the MSC load factor 125 is determined. If the state remains in excess, the process proceeds to step 230 of FIG. 2C.

On the other hand, if the load factor 125 of the MSC is changed and decreased again before the timer counted in step 220 reaches the preset time n, the process proceeds to step 224, where the load factor 125 of the MSC is a threshold of the minor state 140. It is determined whether it is less or equal, and if less or equal, it proceeds to step 226 to drive the set timer.

When the timer driven in step 226 reaches the preset time m, the flow proceeds to step 228 to maintain the pause of the ISP function only for the base station 120 of the C class, and to use the ISP function normally for the remaining base stations. To control. That is, the pause for the ISP function of the base station 115 of the B class is released so that the base station 115 of the B class can use the ISP function.

However, when the timer driven in step 226 does not reach the preset time m, the MSC load rate 125 fluctuates more than a predetermined value, and the MSC load rate 125 again exceeds the threshold of the major state 140. This can be the case. In such a case, the process returns to step 216 to determine again whether the MSC load factor 125 exceeds the threshold of the major state 135.

In step 230 of FIG. 2B, the load ratio 125 of the MSC exceeds the threshold of the minor state 140 and the threshold of the major state 135, and then exceeds the threshold of the critical state 130, and proceeds to step 232. To count the timer.

Thereafter, it is determined whether the timer counted in step 234 reaches the preset time n. If so, in step 236, the ISP functions for the base stations registered in all the MSCs 105 are suspended.

However, if the load factor 125 of the MSC is changed and decreased again before the timer counted in step 234 reaches the preset time n, the process proceeds to step 238 and the MSC load factor 125 is a critical value of the critical state 238. It is determined whether it is less or equal, and if less or equal, the process proceeds to step 240 to drive the set timer.

When the timer driven in step 240 reaches the preset time m, the flow proceeds to step 242 to release the pause state of the ISP function only for the base station 110 of class A, and proceeds to step 222 of FIG. The base station 115, 120 of the C class is controlled to operate in a state in which ISP function is limited.

However, when the timer driven in step 240 does not reach the preset time m, the MSC load rate 125 fluctuates more than a predetermined value, and the MSC load rate 125 again exceeds the critical state 130 threshold. This can be the case. In such a case, the process returns to step 230, where it is again determined whether the MSC load rate 125 exceeds the threshold of the critical state 130.

On the other hand, if the variation of the MSC load rate 125 occurs before the timer driven in step 234 reaches n, whether or not the load rate 125 of the MSC is less than or equal to the threshold of the minor state 140 in step 238. If it is determined that the MSC load factor 125 exceeds the threshold of the critical state 140, the ISP operation of all the base stations is suspended while maintaining the suspended and disabled functions.

2A and 2B, the flow of ending the step 238 is shown. However, in an actual implementation, the flow returns to step 236 and periodically stops driving the ISP of all base stations and maintains the function stop state. As a result, it is determined whether the load factor 125 of the MSC is less than or equal to the threshold of the critical state 130.

 As described above, the present invention is to perform the pause and re-operation according to the load rate of the MSC periodically measured through the interworking of the MSC and the ISP function, to control the ISP function for each base station according to the load rate of the MSC By giving a threshold level according to the MSC load rate increase, the ISP function is controlled step by step.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims, and equivalents thereof.

As described above, the mobile communication system according to the present invention provides a threshold value for each MSC load rate, and controls whether the ISP is used for each base station by a control method set for each threshold value when the MSC load rate exceeds each threshold value. It is suitable for controlling ISP according to MSC load rate.

1 is a diagram showing a structure for ISP control according to a preferred embodiment of the present invention;

2A to 2B are flowcharts showing an operation procedure for ISP control according to a preferred embodiment of the present invention.

<Explanation of Signs of Major Parts of Drawings>

100: MSC operator # 105: MSC

110: class A base station 115: class B base station

120: Class C base station 125: MSC load rate

Claims (16)

Comparing the measured load rate of the mobile communication exchange (MSC) with a set threshold; Selectively controlling the inter-system paging (ISP) function in the MSC according to a result of comparing the load ratio with the threshold value Paging control method between systems in a mobile communication system comprising a. The method according to claim 1, The threshold is set in two or more steps, The base station connected to the MSC is divided into two or more classes, Wherein the controlling step comprises: Paging between systems in the mobile communication system selectively controls the ISP function of the base station corresponding to any one of the two or more classes according to the comparison result of the threshold divided into two or more stages and the load ratio Control method. The method according to claim 1, Wherein the controlling step comprises: And intermittently suspend or off the ISP function. The method according to claim 1, The method comprises: Driving a timer when the load ratio of the MSC exceeds the set threshold; Selectively controlling the ISP function when the driven timer reaches a preset reference time; Paging control method between systems in the mobile communication system further comprising. The method according to claim 1, The method comprises: Driving a timer when the load ratio of the MSC exceeds the set threshold and is less than or equal to the set threshold; Restoring the selectively controlled ISP function when the timer reaches a preset reference time while the MSC load rate does not exceed the set threshold again. Paging control method between systems in the mobile communication system further comprising. Setting a threshold value according to an increase in the load rate of the mobile communication switch (MSC); Registering the base station performing inter-system paging (ISP) in the MSC by setting a class according to importance; When the load ratio of the MSC exceeds a second stage threshold, suspending the ISP function of the second-class base station; When the load ratio of the MSC exceeds a first threshold set higher than the second threshold, a process of suspending ISP functions of all base stations registered in the MSC Paging control method between systems in a mobile communication system comprising a. The method according to claim 6, The method comprises: Driving a timer when the load ratio of the MSC exceeds a set threshold; Selectively suspending or turning off the ISP function when the driven timer reaches a preset reference time; Paging control method between systems in the mobile communication system further comprising. The method according to claim 6, The method comprises: Driving a timer when the load rate of the MSC exceeds a threshold of each set step and is less than or equal to the threshold of each step; Restoring the controlled ISP function when the driven timer reaches a preset reference time while the MSC load rate does not exceed the set threshold again. Paging control method between systems in the mobile communication system further comprising. The method according to claim 6, The threshold and the base station A threshold system divided into at least two stages and a base station divided into at least two classes. At least one base station performing an inter-system paging (ISP) function; An MSC control unit that sets a threshold value according to an increase in load rate generated when transmitting and receiving signals and data to and from a neighboring mobile communication exchange (MSC), the base station and the mobile communication terminals, and sets and registers the base station according to importance; MSC for selectively controlling the ISP function of the base station under the control of the MSC control unit when the load rate exceeds the set threshold Inter-system paging control device in a mobile communication system comprising a. 11. The method of claim 10, The MSC, The inter-system paging control device in the mobile communication system, characterized in that the temporary pause the ISP function. 11. The method of claim 10, The MSC, And inter-system paging control device in the mobile communication system, characterized in that selectively off (Off) the ISP function. 11. The method of claim 10, The MSC control unit, If the load rate of the MSC exceeds the set threshold, the timer is driven, When the timer reaches a preset reference time, the inter-system paging control device in the mobile communication system, characterized in that for selectively controlling the function. 11. The method of claim 10, The MSC control unit, When the load rate of the MSC is less than or equal to the set threshold, the timer is driven, When the driven timer reaches a preset reference time in a state in which the load rate of the MSC does not exceed the set threshold again, the inter-system paging control device in the mobile communication system, characterized in that for restoring the controlled ISP function. The method according to any one of claims 11 to 14, The MSC control unit, If the MSC load rate exceeds the second stage threshold, the ISP function of the second-class base station is suspended. If the load ratio of the MSC exceeds the first threshold set higher than the second threshold, inter-system paging control device in the mobile communication system, characterized in that to suspend the ISP function of all the base stations registered in the MSC. 16. The method of claim 15, The threshold and the base station An apparatus for inter-system paging control in a mobile communication system, characterized in that it is a base station divided into at least two levels and a base station divided into at least two classes.

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