KR100363742B1 - Method for managing resources of BSC in asynchronous IMT-2000 ststem - Google Patents

Abstract

The present invention relates to a resource management method in an asynchronous IMT-2000 system control station, and more particularly, to a control station using a double linked list structure and a shared memory in an asynchronous IMT-2000 system control station. A method of managing a wired resource or a radio resource at a base station.

The present invention constructs a double-link list for the control station currently available in the common memory and the wired / wireless resources in the base station using the common library in the call control block at the start of the control station system. Receives incoming call request from CN and performs call processing.Gets information on the resource pointed to by the current pointer from the double-link list in the common memory using the common library in the call control block when allocating resources. Moves to next and allocates information about allocated resource to busy state and deletes from double link list so that only information about currently available idle channel is always maintained in the list.

Description

Method for managing resources of BSC in asynchronous IMT-2000 ststem}

The present invention relates to a resource management method in a next-generation mobile communication system (International Mobile Telecommunication-2000; IMT-2000) control station, and in particular to a control station using a double link list structure and a common memory in an asynchronous IMT-2000 system control station. The present invention relates to a resource management method in an asynchronous IMT-2000 system control station capable of managing wired resources or radio resources at a base station.

In general, the IMT-2000 system is developed to provide users with free mobility around the world. In addition, various services such as voice, non-voice and wireless calling are integrated into one terminal, and multimedia is provided through various media. It is a system to provide intelligent service and to achieve thorough security of personal information with user's own service through personalization of service. The IMT-2000 not only accommodates the diversity of terminals, from pedestrian cellular phones to car phones, but also includes Global Mobile Personal Communication System (GMPCS), Public Switched Telephone Network (PSTN), and comprehensive information. It also accommodates the diversity of networks such as Integrated Services Digital Network (ISDN).

Digital mobile communication systems include a synchronous system and an asynchronous system as shown in FIG. The synchronous system is composed of a synchronous mobile station, a base station, a control station, an exchange station (10, 21, 22, 31) and the like, and the asynchronous system is composed of an asynchronous mobile station, a base station, a control station, an exchange station (40, 51, 52, 61), and the like. do.

In such a synchronous system, the synchronous mobile station 10 and the synchronous base station 21 interface with the IS-95 radio standard, and the synchronous CN (Core Network) 30 including the synchronous switching station 31 is ANSI-41 (American). Interface is performed according to the Network Standardization Institute (IS-41) standard, and IS-between the synchronous Radio Access Network (RAN) 20 including the synchronous base station 21 and the synchronous control station 22 and the synchronous CN 30. Interface to 634 standard.

In the asynchronous system, the asynchronous RAN 50 including the asynchronous base station 51 and the asynchronous control station 52 and the asynchronous mobile station 40 have a UTRA (Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access; Wide-band CDMA) standard. The interface is running. The asynchronous CN 60, including the asynchronous switching center 61, interfaces with the GSM-MAP (Global System for Mobile Communications-MAP) standard and includes an asynchronous UTRAN (UMTS) including an asynchronous mobile station 40 and an asynchronous RAN 50. The Iu interface is performed between the Terrestrial Radio Access Network) and the asynchronous CN 60.

2 is a diagram showing a configuration of a control station apparatus of an IMT-2000 system according to the related art.

Here, the base station apparatus 100 includes a plurality of base stations BTS1 to BTSn, and wirelessly interfaces data with a mobile station, and the control station 200 is connected to the base station apparatus 100 by an E1 / T1 link to provide an ATM packet. Interface the data, code the data transmitted from the base station apparatus 100 and transmit it to the mobile communication switch, perform call processing / No.7 signal processing, collect alarms from the control station, and transmit them to the control station management unit. do.

The mobile switching center (MSC) 300 interfaces voice, video, and data with the control station 200, and is provided with a plurality of ASS-M (Access Switching Subsystem-Mobile) blocks. .

In addition, the clock generator 400 receives time and frequency clocks transmitted from the Global Positioning System (GPS), and uses the received clocks to generate the system clocks required for each block in the control station and the control station manager.

The control station management unit (BSM) 500 operates the control station 200 or plays a role in overall management such as maintenance, and the local router 600 is provided in another control station device to provide ATM. In addition to routing the packet data, the global router 700 also interfaces data between the local router 600, the control station manager 500, the control station 200, and the packet data network (PSDN) 800. It plays a role.

In the conventional IMT-2000 system configured as described above, the control station 200 interfaces the ATM packet data transmitted from the base station apparatus 100 and then performs vocoding through a vocoder, and transmits to the mobile communication switch 300. It also serves to interface data to the base station in the base station apparatus 100 via the ATM router after the data switched by the mobile communication switch 300 via the vocoder.

At this time, the control station 200 uses the ATM packet routing communication protocol based on ATM in the network matching portion, the call processing portion, No.7 processing portion of the existing control station to the local router in the form of one board It is built in and processes the signal

Here, the control station 200 largely interfaces ATM packet data with the base station apparatus 100, performs call processing and No. 7 signal processing, collects alarms generated from the control station 200, and controls the control station manager ( Local router 210 for transmitting to the side, and a plurality of high-speed transcoder and selector (HTSB; High-Speed Transcoder Selector) (HTSB1) connected to the local router 210 via an E3 / T3 link to perform vocoding functions. It consists of a vocoder 220 consisting of ~ HTSB8.

The resource management method used in the existing synchronous IMT-2000 base / control station configured as described above serially arranges resources and allocates and releases them in order as needed. Therefore, when a problem occurs in a specific hardware, there is a problem that a continuous call setup error occurs, and the base station start-up is performed by transmitting resource information required for call processing through the communication channel between the base station and the control station. -Up) can add unnecessary load.

On the other hand, the base station channel management block uses the information received during start-up to generate data in a single linked list structure for the overhead channel and the currently used wireless channel and to request channel connection from the control station. Each time it receives an idle resource, it selects an idle resource and sends it to the modem to add it to the single link list structure created earlier.

Therefore, when using this technique, when searching for idle channel information for radio channel allocation or searching for channel information being used to release a channel already occupied, a serial search algorithm is used in a single link list structure. As a result, when a large amount of data is required in a system requiring real-time, processing time is required. However, incomplete processing by a time-out may be performed despite being processed normally in an application block.

Accordingly, the present invention has been proposed to solve the above problems of the prior art,

An object of the present invention is to solve the time delay by replacing the time delay caused by using a single link list in the existing synchronous IMT-2000 system with a double link list. In addition, by managing all the information related to the radio channel in the base station in the control station, it is possible to reduce the load due to the transmission of the related information at the start-up (Start_Up).

In addition, by implementing a change in the numbering scheme for radio resources, a double link in an asynchronous IMT-2000 control station can reduce the continuous errors that can occur through serial channel numbering for a single resource. It is to provide a resource management method using a list structure.

A resource management method using a double link list structure in an asynchronous IMT-2000 control station according to the present invention for achieving the above object,

After receiving initial data including shape information from the database, initializing array information for storing channel information, configuring a double link list using current serviceable resources, and a core network ( After receiving the wired / wireless resource allocation request from the Core Network (hereinafter abbreviated as “CN”), the resource information indicated by the status pointer (Status_Pointer) in the common memory is acquired, the status of the acquired resource is changed, and the link list is displayed. Deleting a corresponding node selected by the node; moving the status pointer to a next node; and transmitting channel allocation information to a corresponding base station; After receiving the radio resource release request, the channel ID is obtained using the corresponding Call_ID, and the state of the corresponding resource is changed to Idle. If necessary, add the corresponding resource from the link list. Then, the method consists of a channel release process for transmitting channel release information to a corresponding base station.

1 is a block diagram of an IMT-2000 system according to the prior art;

2 is a block diagram of a control station apparatus of an IMT-2000 system according to the prior art;

3 is a block diagram showing a correlation between a resource management block and a related functional block at a control station using a double link list according to the present invention;

4 is a diagram illustrating a structure of an entire double link list configured in a common memory according to FIG. 3;

5 is a view showing a numbering method for a channel card according to the present invention;

6 is a flow chart showing a process of a channel management method using a double link list of the channel management unit according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1000; Base Station Transceiver Subsystem (BTS)

1010; Modem Unit

1020; Base station channel control

2000; Control Station (BSC; Base Station Controller)

2010; Application section

2020; Shared Library section

2030; Shared Memory section

2040; Operating System (OS)

Hereinafter, a preferred embodiment of a resource management method in an asynchronous IMT-2000 system control station of the present invention according to the above technical concept will be described in detail with reference to the accompanying drawings.

3 is a correlation diagram showing a correlation between a resource management block and a related functional block at a control station using a double link list according to the present invention.

As shown in the drawing, a shared memory commonly used in each application (2011 to 2010 + n) in the control station 2000 is a shared memory area used by several processes simultaneously. It is free to read from, but writing can confuse content when several processes are entered at the same time, requiring a mechanism that only allows one write at a time (e.g. a semaphore). 2030) has wired / wireless resource information for the control station 2000 or the base station 1000, and the resource management block is in the form of a common library unit 2020 for each application (2011 ~ 2010 + n). Semaphore (Semaphore; used for synchronization or exclusive control between tasks in a multitasking operating system). To provide Mutual Exclusion Management. In other words, multiple processes provide the ability to sequence so that only one process can make changes to the data at any one time.

4 is a diagram illustrating a structure of an entire double link list configured in a common memory according to the present invention.

As shown in the figure, in the call control block, a double link list is constructed using a common library at the start of an application after system start-up. The current pointer is used in the list to quickly obtain information about the idle channel. After that, the information about the corresponding channel is deleted from the configured list so that only the information about the currently available channel is maintained in the double link list.

At this time, the base station receives the information on the channel to occupy from the control station without the resource management function for the separate channel to occupy the channel as it is.

On the contrary, when the channel is released, the call control block uses the common library to change information about a channel to be returned using the channel element ID as a key to an idle state and add it to the double link list.

The numbering method as described above is equally applied to selectors in the control station as well as channel card resources, which are radio channels. This numbering method is schematically illustrated in FIG. 5.

5 is a diagram illustrating a numbering method for a channel card according to FIG. 4.

First, the control station system basically reads information on the resources in the control station from the database at start-up, and then assigns the entire assignable channel element ID. After allocating an array, only the available resources form a double link list.

At this time, the channel element IDs are sequentially assigned to each channel card. That is, the first channel in channel card 0 is 'Channel Element ID = 0', the first channel in channel card 1 is '1', and the first channel in the last channel card n is 'n'. Numbering with '' and then numbering from channel card 0 from the next channel. In this way, when a software defect occurs in a specific channel card and service using the corresponding resource becomes unavailable, incomplete call generation due to continuous resource allocation can be prevented.

6 is a flowchart illustrating a processing flow of a channel management method using a double link list of a channel management unit according to the present invention.

As shown in FIG. 2, the function of the entire channel manager may be divided into three stages: a channel initialization process (S100), a channel allocation process (S200), and a channel release process (S300).

First, step ST11 for receiving initial data including shape information from a database; and step ST12 for initializing array information for storing channel information after receiving the data; A channel initialization step S100 including step ST13 for constructing a double link list by using;

After configuring the double link list, receiving a wired / wireless resource allocation request from a CN; acquiring resource information indicated by a state pointer in a common memory after receiving; A step ST16 of changing to Busy; a step ST17 of deleting a corresponding node selected by the link list after the change; a step ST18 of moving the state pointer to a next node Next_Node after deleting the node; and After moving to the next node, the channel assignment step (S200) comprising a step ST19 to transmit the channel assignment information to the corresponding base station,

After transmitting the information, step ST20 for receiving a wired / wireless resource release request from the CN, acquiring a channel ID (Channel_ID) using the call ID (Call_ID), and obtaining the corresponding channel after acquiring the channel ID. A step ST22 of changing the state of the module to Idle, a step ST23 of adding a corresponding resource to the link list after the state change, and a step ST24 of adding channel release information to the corresponding base station after adding the list to the link list; Characterized in that it comprises a channel release step (S300).

The operation of the resource management method according to the present invention configured as described above is as follows.

First, in the channel initialization step (S100), when the control station system starts, the call control block forms a double link list for the control station currently available in the common memory and the wired / wireless resources in the base station using the common library. At this time, the status pointer (Status_Pointer) designates a resource to be allocated next, and the header pointer (Header_Pointer) designates the first resource.

In the channel allocating step (S200), an outgoing call request from a user equipment (hereinafter abbreviated as "UE") or an incoming call request is received from a CN to perform a call processing process. The shared library is used to get information about the resource pointed to by the current pointer from a double-link list in shared memory. Then, the current pointer is moved to the next and the information on the allocated resource is changed to the busy state and deleted from the double link list so that only the information on the currently available idle channel is always maintained in the list.

In the channel releasing step (S300), mapping the call_ID received from the CN using a common library in a call control block in the same manner as the channel allocation when releasing the occupied resource by disconnection from the UE or release of a call from the CN ( Check the node with the same channel ID value by using the channel element ID that is mapped) and change the channel information to Idle and add it to the double link list as opposed to the channel assignment. Be sure to

In addition, the resource status management block or call control block of the operation maintenance can use the common library provided by the system to check the status information inconsistency of the double link list information on the common memory.

By doing so, the current state is not serviced but is included in the double-link list or serviced, but the resource is in the busy or out of service state and checks and corrects it.

According to the above-described "resources management method in the asynchronous IMT-2000 control station", when a channel allocation / release request is received from the call processing control unit of the control station when the asynchronous IMT-2000 base / control station processes the call. By using the double link list structure, compared to the single link list structure, unnecessary search operations can be reduced and the processing can be processed quickly, thereby preventing problems caused by delays in processing time. Has the advantage.

In addition, when a software defect occurs in a specific channel card and service using the corresponding resource becomes impossible, incomplete call generation due to continuous resource allocation can be prevented.

In addition, by equally numbering each channel card, it is possible to prevent the continuous failure due to the occurrence of a failure in a specific channel card. It also has the advantage of ensuring consistency for resource management by being delivered every time channel assignment is made at the control station rather than at the same time.

Claims (5)

In the resource management method in the asynchronous IMT-2000 system control station, A channel initialization process of constructing a double link list for wired / wireless resources in the control station and the base station and storing the double link list in a common memory; A channel assignment process of allocating a channel of a base station with channel assignment information of a double link list stored in the common memory; And a channel release process of releasing the allocated resource when a resource release request occurs after using the allocated channel. The method of claim 1, wherein the channel initialization process comprises: Receiving initial data including shape information from a database; Initializing array information for storing channel information using all assignable channel element IDs as keys after receiving the data; And after the information is initialized, constructing a double link list only with resources that are currently serviceable by using a common library. The method of claim 2, wherein the channel element ID, In the asynchronous IMT-2000 system control station, the channel element ID is assigned by sequentially numbering the first channel in each channel card from 0 to n (an integer greater than or equal to 1). Resource management method. The method of claim 1, wherein the channel allocation process comprises: Receiving an originating call request from a UE or an incoming call request from a CN, and using the shared library, obtaining information about a resource indicated by a status pointer in a double link list in a common memory; Changing the obtained resource state to a busy state after acquiring the resource (channel information); Deleting the corresponding node selected from the double link list after the state change; After deleting the corresponding node, moving the status pointer to a next node and transmitting channel allocation information to a corresponding base station. The method of claim 1, wherein the channel release process comprises: Receiving a wired / wireless resource release request from the CN; Acquiring a channel ID (Channel_ID) mapped to the call ID (Call_ID) after receiving the request; Identifying a node having the same channel ID value after the channel ID is obtained and changing corresponding resource information to an idle state (Idle); Updating the list by adding resource information of the idle state to a double link list after the state change; And transmitting channel release information to a corresponding base station so that the corresponding resource becomes available again after updating the list.