KR20050033951A - Load improvement method in mobile communication system - Google Patents

Abstract

A load improving method in a mobile communication system is provided to enable a base station to confirm whether an assign request of a UATI(Unicast Access Point Identifier) is generated, to intercept an assign request of a repeated UATI, and to intercept a route update message received with an access channel message, not to request a route update process. A base station receives an assign request of a terminal UATI(S20). The base station decides whether identifier values identical with a currently assign requested terminal random identifier or a UATI exist in an internal DB(S21,S22). If not, the base station decides whether a current operational state is the same as a previous operational state(S23). If not, the base station stores the received terminal random identifier in the DB, or generates new terminal UATI information(S24). The base station requests a base station controller to assign a UATI, receives a permission for the UATI, and progresses a UATI assign process(S25,S26).

Description

Load improvement method in mobile communication system {LOAD IMPROVEMENT METHOD IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a mobile communication system. In particular, in a next generation mobile communication system based on high-speed packet data transmission, a base station checks whether a duplicate terminal unique identifier (UATI) allocation request occurs from a mobile communication terminal. A method of improving load in a mobile communication system which blocks a duplicate request for a unique terminal identifier (UATI) and does not require a route update to a higher level by blocking a route update message received when the base station receives an access channel message. It is about.

In general, in the next-generation mobile communication system of Code Division Multiple Access (CDMA) based on high-speed packet data transmission, a forward channel and a reverse channel exist between a mobile communication terminal and a base station according to a radio segment protocol. .

The omni-directional channel is classified into a pilot channel, a MAC, a medium access control channel, a control channel, a traffic channel, and the reverse channel is an access for accessing the system. It is divided into Access channel and Traffic channel in a call state.

On the other hand, a plurality of mobile communication terminals existing in the service area of the mobile communication network are temporarily assigned a unicast access terminal identifier (UATI) consisting of 128 bits from the system when attempting to access the system, the system is assigned Each mobile terminal is identified through a unique terminal identifier (UATI).

FIG. 1 is a signal flow diagram schematically illustrating a process in which a mobile communication terminal 10 is assigned a terminal unique identifier (UATI) from a base station 11 in a conventional mobile communication system.

When it is determined that power is first applied or moved to another subnet, the mobile communication terminal 10 assigns a terminal unique identifier (UATI) corresponding to the identification number of the corresponding terminal 10 from the base station 11. Or update the terminal assigned unique identifier (UATI).

Then, the base station controller 12 is the only terminal with respect to the mobile communication terminal 10 through the relay of the base station 11 according to the request for updating the terminal unique identifier (UATI) or the previously assigned terminal unique identifier (UATI). It will assign a unique identifier (UATI).

And, if the assigned terminal unique identifier (UATI) is delivered to the mobile communication terminal 10 through the relay of the base station 11, the mobile communication terminal 10 stores it in the call setup that is generated later The assigned stored terminal unique identifier (UATI) is used as its identifier.

At this time, the subject to allocate the terminal unique identifier (UATI) can be set differently for each operator of the system.

Meanwhile, the mobile communication terminal 10 notifies the system of its location information in the idle state to increase the paging success rate when transmitting the paging message of the system for the incoming call, and updates the route to the system through the access channel (RouteUpdate). ) Send a message.

In particular, when the mobile communication terminal 10 moves to a different subnet, the mobile communication terminal 10 transmits an overhead message received from the base station 11, that is, a sector parameter message. The base station 11 receives the location information and recognizes that the service area to which it belongs has changed. Accordingly, when the base station 11 transmits a route update message to the base station controller 12, the received base station controller 12 receives the corresponding mobile communication. The location information registered for the terminal 10 is updated.

In this case, since the mobile communication terminal 10 determines whether the service area to which it belongs changes based on the location information received from the base station 11, the mobile communication terminal 10 moves in a densely populated area. Each time the mobile station transmits a route update message to the system, it requests an update of location information.

However, in the conventional technology as described above, in the next-generation mobile communication system based on high-speed packet data transmission, when the mobile communication terminal requests a terminal unique identifier (UATI) assignment to the system side, the base station and the base station in the system. The controller or the like is set to always respond to the allocation request of the terminal unique identifier (UATI), so that the base station is in mobile communication when a continuous and large number of terminal unique identifier (UATI) allocation requests occur due to a malfunction of the mobile communication terminal or system. By checking whether a duplicate terminal unique identifier (UATI) allocation request is requested at the upper end of the base station without blocking a duplicate terminal unique identifier (UATI) allocation request of the terminal, the system is subject to the separate inspection process as described above. Prevent other connections from being overloaded or unexpectedly processed And there are problems that do not provide a quality service.

In addition, when the mobile communication terminal frequently moves in a densely populated area of the base station, when a plurality of mobile communication terminals require a large amount of update of the route location information, the system requests for updating the location information of each mobile communication terminal that is duplicated. By processing these requests one by one without blocking, there is a problem in that the system is overloaded due to the concentration of the above route update request and thus it is not possible to provide a high quality service.

Accordingly, the present invention has been proposed to solve the above-mentioned problems. In the next-generation mobile communication system based on high-speed packet data transmission, a base station needs to allocate a duplicate terminal unique identifier (UATI) from the mobile communication terminal. Checks whether or not to generate a duplicate terminal unique identifier (UATI) allocation request, and prevents the base station from requesting a route update to a higher level by blocking a route update message received together when the base station receives an access channel message. The purpose is to provide a method.

According to an aspect of the present invention, there is provided a mobile station, comprising the steps of: checking, by a base station, whether or not the allocation request is duplicated when a mobile station is requested to allocate a terminal unique identifier; As a result of the check, if the terminal unique identifier assignment request is duplicated, the base station rejects the current terminal unique identifier assignment request.

In addition, when the message is received from the mobile communication terminal, the base station checks whether the route includes only a route update message; If only the route update message exists in the received message, the base station requests a route update to the base station controller; Otherwise, after blocking the route update message included in the received message, transmitting the message to the base station controller to process a request of the corresponding mobile communication terminal.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a flowchart illustrating an operation of a method for improving a load in a mobile communication system according to the present invention. As shown in FIG. 2, a base station uses a random access point identifier (RATI) or a terminal from a mobile communication terminal in its service area. Receiving a request for allocation of a terminal unique identifier (UATI) using a pre-assigned terminal unique identifier (UATI) (S20); When the allocation request occurs, the base station searches the internal database and determines whether there is an identifier value RATI or UATI that is identical to the terminal temporary identifier RATI or the terminal unique identifier UATI currently requested to be allocated. (S21, S22); If the same identifier value (RATI, UATI) does not exist as a result of the determination, determining whether the current operating state of the base station for the corresponding mobile communication terminal is the same as the previous operating state (S23); As a result of the determination, when the current operating state of the base station for the mobile communication terminal is different from the previous operating state, the received terminal temporary identifier (RATI) is stored in an internal database or new terminal unique identifier (UATI) information is internally stored. Creating in a database of (S24); Requesting assignment of a terminal unique identifier (UATI) to the base station controller, and receiving a terminal unique identifier (UATI) assignment from the base station controller to perform a terminal unique identifier (UATI) allocation process (S25, S26); In the above steps S22 and S23, if the same identifier values RATI and UATI exist or the current operation state of the base station for the mobile communication terminal is the same as the previous operation state, the base station identifies the current terminal unique identifier (UATI). ) Step S27 of rejecting the allocation request.

3 is a flowchart illustrating an operation of a load improving method in a mobile communication system according to another embodiment of the present invention. As shown in FIG. 3, a base station requests a route update from a mobile communication terminal in its service area. Receiving step (S30); Parsing the received message when the route update request is requested (S31); Analyzing the parsed message and updating the location information of the corresponding mobile communication terminal by requesting a route update to a base station controller if only a route update message exists in the corresponding message; If only the route update message is present in the parsed message, only the access channel message is transmitted to the base station controller to process a request of the corresponding mobile communication terminal (S34).

The present invention can be applied to a next generation mobile communication system based on high speed packet data transmission, including a mobile communication terminal, a base station, a base station controller, etc. The subject assigning a terminal unique identifier (UATI) in the mobile communication system is a system. Although it can be set differently for each operator of the present invention, it is assumed that the base station controller is responsible for the assignment of the terminal unique identifier (UATI).

The network configuration for implementing the present invention is composed of a mobile communication terminal 10, a base station 11, a base station controller 12 as shown in FIG.

Here, the mobile communication terminal 10 is capable of voice and packet data communication while having mobility.

The base station 11 supports a wireless connection to the mobile communication terminal 10 in its service area. In the present invention, whether the mobile communication terminal 10 requests reallocation of a terminal unique identifier (UATI) is determined. By judging, the mobile terminal 10 blocks a request for assignment of a terminal unique identifier (UATI), which is generated repeatedly by the same identifier values RATI and UATI due to a malfunction of the mobile communication terminal 10 or a system error. By blocking a route update message included in a packet together with a message other than the route update message, the base station controller 12 may be caused by a duplicate allocation request of a terminal unique identifier (UATI) and transmission of a large number of route update messages. It improves the load that is unexpectedly concentrated on the upper part of the system.

The base station controller 12 collectively refers to a system area that is in charge of call processing between a wireless network and a wired network while managing radio resources of the base station 11 as multilinks.

Meanwhile, referring to the flowcharts of FIGS. 2 and 3, the operation of the present invention will generally be described. In the case where it is determined that power is first applied or moved to a different subnet, the mobile communication terminal 10 moves. The system requests an allocation of a terminal unique identifier (UATI), which is a unique number for identifying the terminal 10 in the communication network, or an update of a pre-allocated terminal unique identifier (UATI).

At this time, the mobile communication terminal 10 arbitrarily generates a terminal temporary identifier (RATI) therein and requests the allocation of a terminal unique identifier (UATI) from the system or updates it using a pre-assigned terminal unique identifier (UATI). In response to an allocation request of the mobile communication terminal 10, the base station controller 12 is uniquely assigned a terminal unique identifier (UATI) to the mobile communication terminal 10 through the relay of the base station 11. ) Will be assigned.

And, if the assigned terminal unique identifier (UATI) is delivered to the mobile communication terminal 10 through the relay of the base station 11, the mobile communication terminal 10 stores it in the call setup that is generated later The stored terminal unique identifier (UATI) is used as its identifier.

That is, when the base station 11 receives a request for assignment of a terminal unique identifier (UATI) using a terminal temporary identifier (RATI) or a pre-assigned terminal unique identifier (UATI) from the mobile communication terminal 10 in its service area (S20). The internal database (not shown) is searched (S21) to determine whether there is an identifier value (RATI, UATI) that is identical to the currently assigned terminal temporary identifier (RATI) or terminal unique identifier (UATI) ( S22).

As a result of the determination, if the same identifier values RATI and UATI do not exist, it is determined whether the current operating state of the base station 11 for the mobile communication terminal 10 is the same as the previous operating state (S23). ).

Here, the system divides the operation state of the mobile communication terminal 10 in order to manage the mobile communication terminal 10 in the service area or to perform call setup, and the base station 11 is the mobile communication terminal 10 Upon receiving a request for the assignment of the terminal unique identifier (UATI) from the terminal, it is first checked whether the terminal unique identifier (UATI) is requested to be repeatedly assigned through the steps S21 and S22, and then the step S23 is secondarily performed. Through the current state of the operation of the base station 11 is waiting for the approval of the allocation of the terminal unique identifier (UATI) from the base station controller 12, whether the allocation request of the terminal unique identifier (UATI) has been received from the mobile communication terminal (10). By checking whether the current allocation request of the terminal unique identifier (UATI) is a duplicate allocation request.

At this time, in the step (S23), if the current operating state of the base station 11 for the mobile communication terminal 10 is different from the previous operating state, this is not a request for allocation of a duplicate terminal unique identifier (UATI) Since the base station 11 stores the received terminal temporary identifier RATI in an internal database (not shown) or generates new terminal unique identifier (UATI) information in an internal database (not shown) (S24). .

That is, the mobile communication terminal 10 arbitrarily generates a terminal temporary identifier (RATI) internally for the reason that power is first supplied to the mobile communication terminal 10 and requests allocation of a terminal unique identifier (UATI) from the system. In this case, the base station 11 stores the received terminal Temporary Identifier (RATI) in an internal database (not shown), and the mobile terminal 10 is previously assigned for reasons such as moving to another subnet. When a request is made to update the terminal using a terminal unique identifier (UATI), a new terminal unique identifier (UATI) is generated from the base station controller 12 by generating new terminal unique identifier (UATI) information in an internal database (not shown). Save).

Therefore, when the check result of the step (S22, S23), the current terminal unique identifier (UATI) allocation request is not duplicated, the base station 11 assigns the terminal unique identifier (UATI) to the base station controller 12 After the request, the base station controller 12 receives a terminal unique identifier (UATI) assignment and performs a series of processes for allocating the terminal unique identifier (UATI) (S25 and S26).

Then, in the steps S22 and S23, the same identifier values RATI and UATI exist in a database (not shown) inside the base station 11 or the current state of the base station 11 for the corresponding mobile communication terminal 10 is present. If the operation state is the same as the previous operation state, this means that the current terminal unique identifier (UATI) allocation request is redundant, and thus, the base station 11 rejects the current terminal unique identifier (UATI) allocation request (S27). ).

Meanwhile, the mobile communication terminal 10 informs the system of its location information in the idle state to increase the paging success rate when transmitting the paging message of the system for an incoming call, and route update message through the access channel. By transmitting the system so that the system knows the location information on which service area the mobile communication terminal 10 belongs.

That is, when the base station 11 receives a specific message from the mobile communication terminal 10 in its service area (S30), it first parses the received message (S31).

At this time, the mobile communication terminal 10 receives the location information of the base station 11 through an overhead message received from the base station 11 in a standby state, and knows which service area it is in. Therefore, a route update message is sent to the system side.

Here, the method for requesting a route update by the mobile communication terminal 10 includes a method of transmitting only a route update message in a standby state according to a protocol, and a message other than a route update message transmitted through an access channel in one packet. In addition, a method for transmitting the route update message including the route update message is used.

Therefore, when the base station 11 analyzes the parsed message and only the route update message exists in the corresponding message, the base station 11 requests a route update from the base station controller 12 to update the location information of the corresponding mobile communication terminal 10. (S32, S33).

As a result of the determination of step S32, not only the route update message exists in the parsed message but also a message other than the route update message transmitted from the mobile communication terminal 10 through the access channel in one packet. When the route update message is included and transmitted, the route update message included in the route update message is blocked and only the message received through the access channel is transmitted to the base station controller 12 to process the request of the corresponding mobile communication terminal 10 (S34). ).

At this time, since the mobile communication terminal 10 requests a route update to the base station 11 whenever its location information is changed, that is, whenever the base station 11 receiving its service is changed, the mobile communication terminal 10 is located in a densely populated area. In the case where the mobile communication terminal 10 moves frequently, the route update request increases. In particular, when there are a plurality of mobile communication terminals 10, a message requesting the update of the route location information to a specific base station 11 is required. Will be delivered in bulk.

Therefore, in the present invention, since the base station 11 blocks the route update message transmitted with the access channel message and does not require the route update to the upper end, the base station 11 in the area where the base station 11 is densely populated. ) Move frequently, even if a plurality of mobile communication terminals 10 require a large amount of update of the route location information to the system side, each of the mobile communication terminals 10 generated at the upper end of the base station 11 is duplicated. This reduces the load for handling the location information update request.

In addition, a call processing block for accommodating and processing various call processing requests of each mobile communication terminal 10 and the hardware state of the system periodically are collected and reported, so that the call processing block provides efficient call processing. In the case of dividing the state management block in charge and a statistical block for collecting various call statistics and system statistics and providing the system administrator with information necessary for operating the system normally, the operation state of the base station 11 in the state management block. In addition to the simple statistical data that is periodically reported at the time of determining, the frequency of occurrence of a duplicate terminal unique identifier (UATI) allocation request for a specific mobile communication terminal 10, the frequency of rejection of the request, and rejection of a route update request Data such as frequency, success rate of call establishment according to duplicate terminal unique identifier (UATI) allocation request By providing it to the system administrator, the system administrator can be provided with information that can be used to determine the actual operation status in addition to certain statistical data, thereby managing the system more effectively.

As described above, according to the present invention, in a next generation mobile communication system based on high-speed packet data transmission, a base station checks whether a duplicate request for a unique terminal identifier (UATI) is generated from a mobile communication terminal. By blocking the allocation request of the terminal unique identifier (UATI), and the base station intercepts the route update message received together when the access channel message is received, the system does not require the route update to the upper end, so that the system does not require the duplicate terminal identifier ( UATI) does not check whether to request the allocation, but also prevents the duplicated route update message from reaching the system due to the frequent movement of the mobile communication terminal in a densely populated area. Unnecessary to the system due to demanding processing Is reducing the load has an effect of stable and provides a communication service of high quality.

1 is a signal flow diagram schematically illustrating a process in which a mobile communication terminal is assigned a terminal unique identifier (UATI) from a base station in a conventional mobile communication system.

Figure 2 is a flow chart showing the operation of the load improvement method in the mobile communication system of the present invention.

3 is a flowchart illustrating an operation of a load improving method in a mobile communication system according to another exemplary embodiment of the present invention.

*** Description of the symbols for the main parts of the drawings ***

10: mobile communication terminal 11: base station

12: base station controller

Claims (3)

When the mobile communication terminal is requested to allocate a terminal unique identifier, the base station checking whether the allocation request is duplicated; If the check result, the terminal unique identifier assignment request is duplicated, the base station rejects the current allocation request of the terminal unique identifier, comprising the step of improving the load in a mobile communication system. The method of claim 1, wherein the checking whether the terminal unique identifier allocation request is duplicated includes: determining whether the base station searches an internal database to determine whether there is an identifier value identical to the terminal temporary identifier currently requested or the terminal unique identifier. Process of doing; If it is determined that the same identifier value exists, it is determined that the terminal unique identifier allocation request is duplicated. Otherwise, it is determined whether the current operation state of the base station for the corresponding mobile communication terminal is the same as the previous operation state. ; As a result of the determination, if the current operation state of the base station for the mobile communication terminal is the same as the previous operation state, the load in the mobile communication system comprising the step of confirming that the terminal unique identifier assignment request is duplicated How to improve. When the base station receives the message from the mobile communication terminal, checking whether the base station includes only the route update message; If only the route update message exists in the received message, the base station requests a route update to the base station controller; Otherwise, blocking the route update message included in the received message and transmitting the message to the base station controller to process a request of the corresponding mobile communication terminal. .