KR20000060237A - Method for diagnosing link between base station controller and base transceiver station in mobile communication system - Google Patents

Abstract

PURPOSE: A method for diagnosing links between a base station controller and a base transceiver station is provided to exactly decide states of the links, by dividing sections of a link to diagnose the link states in a code division multiple access(CDMA) mobile communication system. CONSTITUTION: A base station controller(BSC) and a call control processor(CCP) check states of links when a link diagnosing command is received in a state of permitting link diagnoses, to examine numbers of available links. If one number of a link is available, a ping-pong test is performed, and if two numbers of links are available, calls using the two links are examined. If the calls do not exist, the CCP and a base transceiver station(BTS) control processor(BCP) block link processes. Link diagnoses are requested to a local code division multiple access(CDMA) interconnection network(LCIN) high-capacity integrated peripheral controller(IPC) control board assembly(HICA) and a BTS interconnection network(BIN) HICA. The LCIN HICA and the BIN HICA perform from a first test to a fourth test to unblock the link processes. The BSC and the CCP transmit tested results to a base station manager(BSM) to display the results to an operator.

Description

Method for diagnosing link between base station controller and base transceiver station in mobile communication system}

The present invention relates to a method for diagnosing a link between a control station and a base station in a code division multiple access (CDMA) mobile communication system. The present invention relates to a method for diagnosing a link between a control station and a base station of a mobile communication system to accurately determine a state.

1 is a block diagram of a general CDMA mobile communication system.

As shown, a Base Transceiver Station (BTS) 30, which is responsible for wireless connection with the mobile station; A base station controller (BSC) 20 for managing the base station 30; And a base station manager (BSM) 10 that manages and maintains the base station 30 and the control station 20.

The control station 20 includes a call control unit (CCP) 22 which performs all control functions related to call processing of the control station 20; And a Local CDMA Interconnection Network (LCIN) 21 for routing information between the CCP 22 and the base station 30 and the base station manager 10.

The base station 30 includes a base station controller (BTS Control Processor) (BCP) 32 for controlling the overall functions of the base station 30; And a base station interconnection network (BIN) 31 for routing information between the control station 20 and the BCP 32.

In such a mobile communication system, a link between a control station 20 and a base station 30 is used to provide a mobile communication service in response to a request of a mobile station. It is necessary to accurately understand the state of the link between the control station 20 and the base station 30 (BSC-BTS Link) to efficiently manage the system and provide reliable services.

Thus, in the conventional method for diagnosing the BSC-BTS Link, the CCP 22 of the control station 20 performs a ping-pong test with the BCP 32 of the BTS 30. In this ping-pong test, when the CPP 22 generates and transmits a test packet to the BCP 32, the BCP 32 transmits the test packet to the CCP 22 again. Thus, the CCP 22 compares a test packet transmitted through the BSC-BTS Link and a test packet received through the BSC-BTS Link to diagnose the state of the BSC-BTS Link with an error rate of packet data.

However, such a conventional method can only diagnose a normal state of the link, but if it is an abnormal state, it is not possible to accurately diagnose which part is abnormal. Therefore, when restoring an abnormal link, the operator has to check the entire path of the link between the control station 20 and the base station 30 directly, and there is a disadvantage in that link recovery takes a long time.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to divide the interval of the link between the control station and the base station and diagnose the state of the link so as to accurately determine the state of the link. The present invention provides a link diagnosis method between a control station and a base station of a mobile communication system.

In order to achieve the above object, the link diagnosis method between the control station and the base station of the mobile communication system according to the present invention,

In a link diagnosis permission state, when a link diagnosis command for diagnosing a link between a BTC and a base station (BTS) is received, a call control unit (CCP) of the BSC determines the link state. Checking and checking the number of available links;

A second ping-pong test if the number of available links is one or more; if the number of available links is two or more, a second test for checking whether there is a call using a link; Steps;

If there is no call using the link as a result of the check, the local CDMA mutual processing is performed to block each link from the CCP and the BTS control processor (BCP) of the BTS and to perform the routing management function of the BSC. A third step of requesting link diagnosis to an access network routing management unit (LCIN HICA) and a base station interconnection network routing management unit (BIN HICA) which performs the routing management function of the BTS;

A fourth step of receiving the request, the LCIN HICA and the BIN HICA unblocking each link after performing a first test to a fourth test, respectively;

The CCP of the BSC transmits the test results to a base station manager (BSM) which performs the operation management and maintenance functions of the BTS and the BSC, and performs a fifth step of displaying the test results to an operator. It is characterized by the methodological configuration.

The first step may include: checking whether the BSM is in a diagnosis permission state when a link diagnosis command between the BSC and the BTS is received from a system operator; If the test result is a diagnosis permission state, transmitting a diagnosis command from the BSM to the CCP of the BSC, and checking whether the CCP is currently performing diagnosis; As a result of the diagnosis check, if the CCP is in the diagnosis execution state, the diagnosis result is reported and the diagnosis is terminated. If the diagnosis check state CCP is not in the diagnosis execution state, the link state is checked to check the number of available links. Characterized in that performing the steps.

In the fourth step, the first test is a test for a node connected to a link, and the second test is a link driver in which data transmitted from HICA and matching data between the LCIN and BIN are performed. It is a test that diagnoses by comparing the data received by looping back from the controller. It is a test for diagnosing the path between the LCIN HICA and the link driver controller of LCIN and the path between the BIN HICA and the link driver controller of BIN, and the third test is BTS. Connect the transmit / receive terminal from the link driver controller in BIN to compare the data transmitted from LCIN HICA of BSC with the data received from the link driver controller in BIN, and diagnose the path between LCIN HICA and link driver controller of BIN. The fourth test is to perform the first to third tests at the same time It features.

1 is a block diagram of a general mobile communication system;

2 is a block diagram of a control station and a base station to which the present invention is applied;

3A and 3B are flowcharts illustrating a link diagnosis method between a control station and a base station in a mobile communication system according to the present invention;

<Description of the code | symbol about the principal part of drawing>

21: Local CDMA interconnect network 21a: Local CDMA interconnect network routing management unit

21b: Routing part 21c, 31c: Back board

21d, 31d: Link driver controller 31: Base station interconnection network

31a: base station interconnection network routing management unit 31b: routing unit

Hereinafter, the link diagnosis method between the control station and the base station of the present invention will be described in detail with reference to the accompanying drawings.

2 shows a link path diagram between the control station 20 and the base station 30 to which the present invention is applied.

Referring to the LCIN 21 of the control station 20, the routing unit (High Performance IPC Routing Node Assembly (HRNA) 21b) is provided with a plurality of nodes (node) to connect the internal system to each node between the internal system Performs information routing function and performs RS-232C communication. The LCIN High-Capacity IPC Control Board Assembly (LCIN Routing Management Unit) 21a performs a function of managing the HRNA 21b provided in the control station 20. The control station 20 and the base station 30 are far apart, and the control station 20 and the base station 30 communicate with each other in an E1 / T1 manner. The link driver controller 21d of the control station performs a matching function between the RS-232C communication method and the E1 / T1 communication method in order to connect the HRNA 21b and the base station 30. The high-capacity IPC Line interface E1 Assembly (HLEA) 21c of the control station 20 is a backboard that accommodates the link driver controller 21d.

And when the BIN 31 of the base station 30, the HRNA (31b) is provided with a plurality of nodes (node) to connect the internal system to each node to perform the information routing function between the internal system, RS-232C communication Do this. The BIN HICA 31a manages the HRNA 31b provided in the base station 30. The link driver controller 31d of the base station 30 performs a matching function between the RS-232C communication method and the E1 / T1 communication method in order to connect the HRNA 31b and the control station 20. The high-capacity IPC line interface E1 assembly (HLEA) 31c of the base station 30 is a backboard that accommodates the link driver controller 31d.

The method according to the invention for diagnosing the state of such a link between the control station 20 and the base station 30 is shown in Figs. 3a and 3b.

In the link diagnosis method between the control station and the base station of the mobile communication system according to the present invention, when the link diagnosis command is received in the link diagnosis permission state, the CCP 22 of the BSC 20 checks the link state to determine the number of available links. A first step of checking (ST11-ST17); A second ping-pong test if the number of available links is one or more; if the number of available links is two or more, a second test for checking whether there is a call using a link; Steps ST18-ST21; If there is no call using the test result link, the CCP 22 and BCP 32 block each link from being used, and request link diagnosis to the LCIN HICA 21a and the BIN HICA 31a, respectively. A third step ST22-ST24; Upon receiving the request, the LCIN HICA 21a and the BIN HICA 31a perform the first test to the fourth test, respectively, and then unblock each link to be usable (ST25, ST26). )Wow; The CCP 22 of the BSC 20 transmits the test results to the BSM 10 to display the test results to the operator.

In the first steps ST11-ST17, when a link diagnosis command between the BSC 20 and the BTS 30 is received from the system operator, the BSM 10 checks whether the diagnostic permission state is present (ST11, ST12) and ; Checking whether the CCP 22 is currently performing a diagnosis by transmitting a diagnosis command from the BSM 10 to the CCP 22 of the BSC 20 if the diagnosis result is allowed to be diagnosed (ST13-ST15); As a result of the diagnosis check, if the CCP 22 is in the diagnosis execution state, report the diagnosis result and terminate the diagnosis. If the diagnosis result check CCP 22 is not in the diagnosis state, use the link state by checking it. Checking the number of possible links (ST16, ST17) is performed.

In the fourth steps ST25 and ST26, the first test is a test for a node connected to a link, and the second test is a loopback (data) transmitted by the HICA and the transmission data in the link driver controller. It is a test for diagnosing the path between the HICA and the link driver controller by comparing the received data to be back), and the third test is connected to the transmission / reception terminal in the link driver controller 31c in the BIN 31 of the BTS 30 to connect the BSC 20. The LCIN HICA 21a and the BIN 31 of the BSC 20 are compared by comparing the transmission data with the data received from the link driver controller 31c in the BIN 31 and the received data. Is a test for diagnosing a path between the link driver controllers 31c, and the fourth test is to simultaneously perform the first to third tests.

Referring to the link diagnosis method between the control station and the base station according to the present invention as follows.

First, when a diagnosis command of a link between the BSC 20 and the BTS 30 is received from the system operator, the BSM 10 checks a diagnosis flag indicating whether the diagnosis is allowed or not to determine whether the diagnosis is in the allowed state (see FIG. ST11, ST12). If the diagnostic flag test result indicates that the diagnosis is in the inhibited state, the link diagnosis function is not performed (ST13 and ST28). However, if the flag check result is in the diagnosis permission state, the BSM 10 transmits a diagnostic command to the CCP 22 of the BSC 20 (ST13, ST114).

Then, the CCP 22 checks whether the current CCP 22 is in a link diagnosis execution state (ST15). If the current link diagnostic execution state, CCP 22 stops the diagnostic execution command requested from the BSM (10). However, if the CCP 22 is not in the diagnosis execution state, the link state is checked to check the number of available links (ST16 and ST17).

If the number of available links is one, the Ping-Pong Test, which is a conventional link diagnosis method, is performed (ST18, ST19, ST20). The ping pong test result is then reported from the CCP 22 to the BSM 10 (STST27). When there is only one link in a normal state that can be used, when the link diagnosis is performed, the link is disconnected to the BTS 30, thereby disconnecting the communication between the BSC 20 and the BTS 30.

However, as a result of checking the number of available links, if the number of available links is two or more, it is checked whether there is a call using a link (ST18, ST21). If a call uses a link that results in a test, wait until the call ends. In this way, if there is no call using a link, the CCP 22 and the BCP 32 block each link from being used for purposes other than diagnosis (ST23).

CCP 22 requests link diagnosis to LCIN HICA 21a and BCP 32 to BIN HICA 31a (ST24). Upon receiving the request, the LCIN HICA 21a and the BIN HICA 31a perform first to fourth tests, respectively (ST25).

In the description of each test, the first test (self test) is a test for a node connected to a link. In the LCIN 21, the path between the nodes of the LCIN HICA 21a and the HRNA 21b is determined. The BIN 31 diagnoses a path between each node of the BIN HICA 31a and the HRNA 31b. At this time, each of the HRNA (21b) (31b) has a plurality of nodes, the node to be diagnosed can be performed by designating one specific node, it is possible to diagnose all nodes.

The LCIN HICA 21a and the BIN HICA 31a each perform a second loop (local loop back test), and only the operation of the LCIN HICA 21a will be described since its operation is performed in the same manner. The LCIN HICA 21a sets the path so that the test data is looped back from the link driver controller 21d through the node of the HRNA 21b, and then the data transmitted to the HRNA 21b and the transmitted data are transmitted to the driver controller 21d. The loopback is performed to compare the received data, and the path between the LCIN HICA 21a and the link driver controller 21d is diagnosed. In this manner, the BIN HICA 31a also diagnoses the path between the BIN HICA 31a and the link driver controller 31d.

Then, in order to perform a third test (remote loop back test), data transmitted from the BSC 20 to the BTS 30 is connected to the transmission / reception terminals of the link driver controller 31d of the BIN 31. The path is set to loop back in the link driver controller 31d. The LCIN HICA 21a then sends test data to the BTS 30 via the HRNA 21b, which compares the data returned by looping back from the link driver controller 31d of the BIN 31 and returning the LCIN. The link between (21) and BIN (31) is diagnosed. The fourth test is to simultaneously perform the first test, the second test, and the third test.

In order to perform each of these tests, the operator must input a parameter. The parameters required to perform the first test and the second test are the number of tests, and the third test is the test time. Thus, the diagnosis results of the first test and the second test are obtained by comparing the number of successful times by the number of tests. The third test is obtained by comparing the number of packets transmitted during the test time, the number of packets not received because a certain time has elapsed, and the number of packets received abnormally, and a bit error (Frame Alignment Signal Error) generated during the test time. ), slip error and bipolar error can be obtained incidentally.

Thus, by diagnosing the link between the BSC 20 and the BTS 30 by section, it is possible to recognize the cause of the abnormality accurately and quickly.

When the first to fourth tests are completed in this manner, the CCP 22 and the BCP 32 perform unblocking so that each link can be used for purposes other than diagnosis (ST26).

When the first to fourth test results are transmitted to the CCP 22, the CCP 22 transmits the results to the BSM 10 (ST27), and the BSM 10 displays the results for the system operator to know. display to terminate the diagnosis (ST28).

The link diagnosis method according to the present invention may be performed not only at the request of a system operator but also periodically at a predetermined time, and may be automatically performed at a specific time. Also, if the link status is not normal, link diagnosis can be automatically performed.

As described above, the link diagnosis method between the control station and the base station of the mobile communication system according to the present invention, the link between the control station and the base station LCIN HICA and HRAN node, LCIN HICA and LCIN link driver controller, LCIN HICA By diagnosing normality by link link controller of BIN and link driver controller of BIN, BIN HICA and HRNA node, and link driver controller of BIN HICA and BIN, it is possible to pinpoint not only the link status but also which part is abnormal.

Claims (3)

In the method for diagnosing a link between a mobile communication control station (BSC) and a base station (BTS), A first step of checking the number of available links by checking a link state in a call control processor (CCP) of the BSC when a link diagnosis command is received in a link diagnosis permission state; A second ping-pong test if the number of available links is one or more; if the number of available links is two or more, a second test for checking whether there is a call using a link; Steps; If there is no call using the link as a result of the check, the local CDMA mutual processing is performed to block each link from the CCP and the BTS control processor (BCP) of the BTS and to perform the routing management function of the BSC. A third step of requesting link diagnosis to an access network routing management unit (LCIN HICA) and a base station interconnection network routing management unit (BIN HICA) which performs the routing management function of the BTS; A fourth step of receiving the request, the LCIN HICA and the BIN HICA unblocking each link after performing a first test to a fourth test, respectively; The CCP of the BSC transmits the test results to a base station manager (BSM) which performs the operation management and maintenance functions of the BTS and the BSC, and performs a fifth step of displaying the test results to an operator. A method for diagnosing a link between a control station and a base station of a mobile communication system. The method of claim 1, wherein the first step, When the link diagnosis command between the BSC and the BTS is received from a system operator, checking whether the BSM is in a diagnosis permission state; If the test result is a diagnosis permission state, transmitting a diagnosis command from the BSM to the CCP of the BSC, and checking whether the CCP is currently performing diagnosis; As a result of the diagnosis check, if the CCP is in the diagnosis execution state, the diagnosis result is reported and the diagnosis is terminated. If the diagnosis check state CCP is not in the diagnosis execution state, the link state is checked to check the number of available links And a method for diagnosing a link between a control station and a base station of a mobile communication system. The method of claim 1, wherein in the fourth step, The first test is a test for a node connected to a link, and the second test is a loop back in a link driver controller in which data transmitted from HICA and the transmission data perform matching function between LCIN and BIN. A diagnostic test is performed by comparing the received data, and the path between the LCIN HICA and the link driver controller of the LCIN and the path between the BIN HICA and the link driver controller of the BIN, and the third test is the link driver controller in the BIN of the BTS. This is a test for diagnosing the path between LCIN HICA and BIN's link driver controller by comparing the data transmitted from LCIN HICA of BSC with the data received and fed back from the link driver controller in BIN by connecting the transmit / receive terminal at The test is characterized in that for performing the first to third tests at the same time Diagnosis link between the control station and the base station of the new system.