KR20000073980A - V5.2 Interface Operating Method Of WLL System - Google Patents

Abstract

PURPOSE: A method for operating a V5.2 interface of a wireless local loop(WLL) system is provided to transmit initial data through an initial control channel in a digital link selected by a polling system and to set up and operate a nailed-up path switching for operating the V.5.2 interface between an access network(AN) and a local exchange(LE) by using the initial data. Therefore, the V5.2 interface of the WLL system can be operated without an additional Q3 interface embodied by a telecommunication management network(TMN). CONSTITUTION: An access network(AN) selects one of many digital links connected with a local exchange(LE) to set up an initial control channel, by a polling system. The AN transmits an establish request message for a communication between layer management entity and data link layer, to a local exchange(LE) through a public switching telephone network(PSTN) control channel. The AN waits for an acknowledgement from the LE. If a MDL establish confirm message is received from the LE before predetermined time, the AN recognizes the PSTN control channel of a selected digital link as an initial control channel. The AN transmits an initial data request message for a communication between layer management entity and protocol entity(MDU), to the LE through the corresponding initial channel. The AN waits for a reception of MDU initial data for predetermined time. If the MDU initial data is received from the LE, the corresponding AN performs an initialization of a database through the received MDU initial data and an initial start-up variable ID, and simultaneously sets up a nailed-up path switching to execute a next set-up process.

Description

V5.2 Interface Operating Method Of WLL System

The present invention relates to the operation of a V5.2 interface of a wireless local loop (WLL) system. In particular, the present invention relates to a V5.2 interface operation by using a control channel of a predetermined digital link interconnecting a local exchange and an access network as an initial control channel. The present invention relates to a method of operating a V5.2 interface of a WLL system that enables to configure failed-up path switching.

In general, the V5.2 protocol provided by the international standard (ITU-T G.965) includes analog landline and public telephones, ISDN (Integrated Services Digital Network) basic rate interface (BRI) connections (144kbps of 2B + D). And, provide services for ISDN PRI (Primary Rate Interface) connections (1544kbps of 23B + D, 2048kbps of 30B + D) and analog or digital leased line connections, as shown in FIG. An interface standard for providing various services between an access network (AN) and a local exchange (LE).

Meanwhile, an access network (AN), that is, a WLL V5.2 system, for accommodating a mobile subscriber's connection over the air based on a corresponding V5.2 protocol requires a protocol for mobility processing of a mobile terminal. Operators who want to commercialize the WLL V5.2 system will provide mobility handling of terminals provided by existing wireless services (DCN, PCS, etc.) to compensate for the weakness of wireless. The connection state for operating the V5.2 interface between the local exchanges LE is shown in FIG.

Here, a plurality of digital links having a transmission rate of 2048kbps interconnecting an access network (AN) and a local exchange (LE), which are WLL V5.2 base station controllers, allocate resources for a call. It can be divided into a trunk line and a V5.2 interface link that will be in charge of the V5.2 interface. The V5.2 interface link interconnects the access network (AN) and the local exchange (LE) to control the general call and access network ( AN) access management, service management of the local exchange (LE), provisioning and re-provisioning (Re-provisioning) exchange of start-up information between the local exchange (LE) and the access network (AN). It means a control link that can perform functions such as -provisioning.

In addition, in the related art, in order to effectively manage and operate the above functions, that is, to operate the V5.2 interface, a Q3 interface by a Telecommunication Management Network (hereinafter, referred to as 'TMN') must be provided. TMN was operated as a separate network from the access network (AN) or the local exchange (LE).

That is, the conventional recommendation stipulates that a variable ID (Variant IDentifier) data group for initial operation of the WLL V5.2 system and a functional implementation for transferring data for various operations are operated with the Q3 interface by the TMN. In the WLL system that does not implement the interface or the WLL system that cannot operate the Q3 interface due to the small size of the system, the manual operation of the operator is required to match the provisioning data with the local exchange (LE) at the initial operation. There was discomfort.

As described above, in the conventional WLL system, when the V5.2 interface is to be operated, it is inconvenient to separately implement the Q3 interface by the TMN or to set provisioning data for initial operation by the operator's manual operation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to operate a V5.2 interface between a local exchange and an access network using initialization data transmitted through an initial control channel of a digital link selected according to a polling scheme. By setting and maintaining fixed path switching, it is possible to operate the V5.2 interface of the WLL system without implementing the Q3 interface by TMN separately.

1 is a diagram illustrating a state of interconnection between a general local exchange and an access network.

2 is a diagram illustrating a connection state for operating a V5.2 interface between a conventional local exchange and an access network.

3 is an operation flowchart for implementing a V5.2 interface operating method of the WLL system according to the present invention.

Explanation of symbols on the main parts of the drawings

AN: Access Network; Local Exchange, local exchange

A feature of the present invention for achieving the above object comprises the steps of: transmitting an MDL setup request message to a local exchange via a PSTN control channel of a digital link; Checking whether an MDL configuration approval message is received within a predetermined time and setting an initial control channel; Transmitting an MDU initialization data request message to the local exchange through an initial control channel; Receiving the MDU initialization data and initializing the database and at the same time to set the fixed path switching with the local exchange.

Another aspect of the present invention provides a method for transmitting an MDL configuration request message to an access network through a PSTN control channel of a digital link; Establishing an initial control channel by checking whether an MDL configuration approval message is received within a predetermined time; And transmitting the MDU initialization data for the fixed path switching configuration to the access network through an initial control channel.

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

A connection state for operating a V5.2 interface between an access network (AN) and a local exchange (LE), which is a WLL system according to the present invention, is the same as in the related art shown in FIG. The base station transceiver is further included to provide a wireless communication service, and the variable ID data group required for initial operation of the corresponding WLL system and data necessary for various operations can be managed without implementing a Q3 interface by the TMN. .

That is, in the present invention, in the state in which the initialization data for the initial operation of the access network (AN) and the local exchange (LE) are defined, respectively, one of the plurality of digital links connecting to each other is selected and used as a control link, and the PSTN Public Switched Telephone Network When the local exchange (LE) transmits the initialization data defined to the access network (AN) through the control channel, the access network (AN) uses the initialization data to perform initial operation and various operations. Maintained failed-up path switching.

Accordingly, the present invention is able to deliver and operate data necessary for initial operation of the system and various operations with the local exchange (LE) by maintaining the corresponding fixed path switching without implementing a separate Q3 interface by the TMN.

Here, fixed path switching refers to semi-permanent software switching that maintains the switching without being interfered with other switch connections, once connected, unlike a general call switch connection.

Meanwhile, in order to implement a V5.2 interface through the corresponding fixed path switching and initialization data operation, signaling transmission and reception between the access network (AN) and the local exchange (LE) for accurate connection and disconnection of a control channel is performed. In addition, among the many digital links interconnecting the corresponding local exchange (LE) and the access network (AN), a digital link, that is, a relay line, to be used as a V5.2 interface link for control is continuously defined and is not interrupted by a general call. To provide switching.

Then, the logical V5.2 group link data and control channel information respectively corresponding to a plurality of different access networks (AN) are managed for the corresponding fixed path switching, and information for variable IDs to be reprovisioned (link Configuration information, switch information, etc.).

Here, the link configuration information includes the number of links, the start link, the end link, the primary link and the secondary link, and the switch information includes the first protection link. And channel assignment information for the second protected link.

In addition, the present invention manages information on the V5.2 signaling link type (Type) for the corresponding fixed path switching, when the relay line for the general call is connected when the corresponding relay line type is V5.2 signaling link type It connects other idle relay lines without connecting the relay lines.

When re-provisioning occurs due to the conversion of digital link or subscriber related information during V5.2 protocol operation, the predetermined fixed path switching is released and the fixed path switching is provided by new provisioning data.

In other words, the present invention enables to exchange and operate the relevant data and operation information through a digital link connected between the access network (AN) and the local exchange (LE), without implementing the Q3 interface by a separate TMN The operation of the V5.2 interface operation of the WLL system according to the present invention will be described with reference to FIG. 3 as follows.

The WLL system, an access network (AN), cannot communicate with each other unless a control channel is established with the local exchange (LE) at the time of initial system setup. One of the digital links is selected according to a polling method (step S31).

The access network (AN) transmits a communication between layer management entity and data link layer (MDL) establishment request message to the local exchange (LE) through a PSTN control channel, which is the 16th channel of the selected digital link. After (step S32), the acknowledgment of the local exchange LE is waited for a predetermined time.

That is, it is checked whether the MDL establishment confirmation message is received from the local exchange LE (step S33), and when the corresponding MDL establishment approval message is not received, the time counted by its own timer is set to a predetermined time. Check whether it has passed (step S37).

At this time, when the counting time has not passed the predetermined time, the flow returns to step S33 to continuously check whether the MDL setting approval message is received from the local exchange LE, and when the counting time has passed the predetermined time, the flow returns to step S31. Selects another digital link according to the polling method, and then repeatedly transmits the MDL configuration request message through the PSTN control channel of the selected digital link. Set up an initial control channel over which a positive acknowledgment is received.

On the other hand, when the MDL setup approval message is received from the local exchange LE before the predetermined time elapses in step S33, the access network AN recognizes the PSTN control channel of the currently selected digital link as an initial control channel. After the communication between layer management entity and protocol entity (MDU) initialization data request message is transmitted to the local exchange (LE) through the corresponding initial control channel (step S34), the MDU initialization data is received from the local exchange (LE) for a predetermined time. Wait for a while.

That is, it is checked whether MDU initialization data is received from the local exchange LE (step S35), and when the MDU initialization data is not received, it is checked whether the time counted by its own timer has passed a predetermined time (step S35). S38).

At this time, if the counting time has not passed the predetermined time, the flow returns to step S35 to continuously check whether the MDU initialization data is received from the local exchange LE, and if the counting time has passed the predetermined time, the flow returns to step S34. The MDU initialization data request message is retransmitted.

On the other hand, when MDU initialization data is received from the local exchange LE before the predetermined time elapses in step S35, the access network AN receives the received MDU initialization data, that is, information for each interface ID and variable ID (link configuration information). Initializing the database using the initial start-up variable ID and setting the fixed path switching with the corresponding local exchange (LE) (step S36). do.

The V5.2 interface operation of the WLL system described above is commonly applied to the access network (AN) and the local exchange (LE), but the MDU initialization data used to set the fixed path switching for the initial operation is the local exchange (LE). Provided only by

In addition, the MDU initialization data is converted into a control signal according to clauses 2 to 3 of ITU-T Recommendation Q.291 and transmitted from the corresponding local exchange (LE) to the access network (AN), and the access network (AN) is transmitted. The received initialization data is applied to the initialization.

Meanwhile, the above-described V5.2 interface operation operation is described based on the access network (AN). In the case of the V5.2 interface operation operation by the corresponding local exchange (LE), the MDL configuration approval message is received from the access network (AN). When received, the MDU initialization data is transmitted directly without requesting the MDU initialization data to the corresponding access network (AN).

In addition, the embodiments according to the present invention are not limited to the above-described embodiments, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

As described above, the present invention uses the initialization data transmitted through the initial control channel of the digital link selected according to the polling method to set and maintain the fixed path switching for operating the V5.2 interface between the local exchange and the access network, TMN The V5.2 interface of the WLL system can be operated without implementing the Q3 interface separately.

Claims (8)

Transmitting an MDL setup request message to a local exchange through a PSTN control channel of a digital link; Checking whether an MDL configuration approval message is received within a predetermined time and setting an initial control channel; Transmitting an MDU initialization data request message to the local exchange through an initial control channel; And receiving the MDU initialization data and initializing the database and setting up a fixed path switching with the local exchange. The method of claim 1, Selecting another digital link according to a polling method when the MDL establishment approval message is not received within a predetermined time in the initial control channel setting step; And transmitting the MDL setup request message to the local exchange through the PSTN control channel of the selected digital link. The method of claim 1, The setting of the fixed path switching with the local exchange includes: checking whether MDU initialization data is received from the local exchange within a predetermined time; And re-transmitting an MDU initialization data request message to the local exchange when the MDU initialization data is not received within a predetermined time. The method according to claim 1 or 3, The MDU initialization data includes a V5.2 interface ID, variable ID information, and initial drive variable ID required for initial operation of the V5.2 interface. The method of claim 4, wherein The variable ID information includes link configuration information including link number, start link, end link, primary link, and secondary link information, and switch information including channel allocation information of the first protection link and the second protection link. Method of operating the V 5.2 interface of the WUEL system comprising a. The method according to claim 1 or 3, The fixed path switching is a semi-permanent software switching that maintains a fixed switching without interfering with other switch connections. Transmitting an MDL setup request message to an access network through a PSTN control channel of a digital link; Establishing an initial control channel by checking whether an MDL configuration approval message is received within a predetermined time; And transmitting MDU initialization data for the fixed path switching configuration to the access network through an initial control channel. The method of claim 7, wherein Selecting another digital link according to a polling method when the MDL establishment approval message is not received within a predetermined time in the initial control channel setting step; And transmitting the MDL setup request message to the access network through the PSTN control channel of the selected digital link.