KR100353650B1 - System for interfacing between multi dect protocol stacks - Google Patents

Abstract

The present invention relates to an exchange system, and more particularly, to a system for supporting inter-board and inter-decks base station mobility supporting a deck cluster when using a DECT (Digital European Cordless Telecommunication) system.

The present invention provides a protocol stack and an interface for performing call control and exchange operations in a system for performing an interface between multiple deck protocol stacks, a system task for processing a general call, a call control and mobility management of a deck terminal. Interface with the deck interface board using an exchange system to perform, and inter-processor control (IPC), which is communication between the exchange system and the processor, manages channel setting and release from the deck terminal, and in the deck interface board of the deck terminal. The base station interface board, which has a text cluster function and implements voice and data services through the interface with the deck base station, performs voice and data communication with the deck terminal, while guaranteeing mobility between the base stations. By assigning and releasing wireless channels for the call It is composed of a deck base station for implementing a cell function for the deck terminals.

Description

SYSTEM FOR INTERFACEING INTEGRAL MULTI-DECK PROTOCOL STACKS {SYSTEM FOR INTERFACING BETWEEN MULTI DECT PROTOCOL STACKS}

The present invention relates to an exchange system, and more particularly, to a system for supporting inter-boardboard and inter-base station mobility when using a DECT (Digital European Cordless Telecommunication) system.

1 is a diagram illustrating a single deck protocol stack system according to the prior art.

In general, an exchange system (KP / PBX) that provides a wireless solution supports mobility between base stations (BS). Typically, a system for a DECT having a single deck protocol stack system, as shown in FIG. 1, places a DECT protocol stack on any element in the switching system to provide a service for the deck. Is supported. However, there is a problem in that a system having a single deck protocol stack supports only a deck service limited to a service capacity that can be supported by a DECT interface card because there is only one deck protocol stack.

2 illustrates a multiple deck protocol stack system according to the prior art.

The deck system having the multiple deck protocol stack system includes a multiple deck interface board (Multi DECT Interface board) in units of a multi-bearer control entity in MAC layer (MBC) as shown in FIG. Thus, in the deck system, the Master board includes all of the DECT protocol stacks, and the Slave board includes the MBC tasks and the DECT protocol stacks in the DECT protocol stack. Only modules that are in charge of the master board and interfaces are provided.

Thus, a text cluster is configured based on each deck interface card to perform a text service. In such a cluster structure, a load on an interface between a master board and a slave board is generated. Thus, there is a problem in that exception processing is often performed for flow control between tasks due to a load difference between the base station connected to the master board and the base station connected to the slave board.

Accordingly, an object of the present invention is to provide a deck system that supports a board-to-board interface without eliminating the case in which the capacity of the deck service in the system is caused by software.

The present invention for achieving the above object, in the system for performing the interface between the multiple deck protocol stack, performing call control and exchange operations, call control, mobility management of the system task and the deck terminal for processing a general call Interface with a deck interface board using an IPC (Inter-Processor Control) communication between the exchange system and the processor, and manages channel setting and release from the deck terminal. The base station interface board, which has a text cluster function and implements voice and data services through the interface with the base station, performs voice and data communication with the base station. And no call for calls originating from the deck terminal It is configured to allocate and release the channel to the base station that implements the dekteu cell function for the dekteu terminal.

1 illustrates a single deck protocol stack system according to the prior art.

2 illustrates a multiple deck protocol stack system according to the prior art.

3 is a block diagram showing an association configuration between a deck system and an exchange system for performing functions in an embodiment of the present invention;

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

3 is a block diagram showing an association configuration between a deck system and an exchange system for performing functions in an embodiment of the present invention.

As shown in FIG. 3, the present invention provides an exchange system (KP / PBX) 300, a DECT Base Station (DBS) 350, and a DECT Base Station Interface board (BSI). 370 has a system hardware structure. A DECT protocol stack is applied to each of the hardware, that is, the exchange system 300, the deck base station 350, and the deck base station interface board 370. The exchange system 300 is composed of a call control module (311), an operating system (OS) 313, the main system (315), the existing system task 317, It consists of an interface board (Interface board) for interfacing with the deck base station 350, and a system board for managing the interface board, and operates the call control (Call Control) and the overall exchange operation (OS: Operating System). Here, the main system 315 is a Data Link Control (DLC) Link Access Procedure (LAP) -C Entity and a Network Layer (NWK (NetWorK) layer) (Call control, Mobile Control .. And a DECT module to interface with and control the existing system task 317. Here, the network layer performs a function of exchanging messages for call setup, maintenance, and release. The exchange system 300 and the deck base station interface board 370 communicate with each other through an interprocessor communication (IPC) protocol.

The deck base station 350 includes a radio frequency (RF) module 351, a burst mode controller (BMC) 353, and a multi-bearer control entity in MAC layer. 355, a TBC (Traffic Bearer Control entity in MAC layer) 357, and a DBC 359. Here, the burst mode controller 353 receives ADPCM (Adaptive Differential Pulse Code Modulation) data transmitted from a voice processor (not shown) of the deck base station 350 according to characteristics of the dec system. And transmits the signal received from the exchange system 300 through the timeslot determined in the following manner. The radio frequency module 351 and the burst mode controller 353 perform data exchange on the air with a DECT terminal. In addition, the deck base station 350 is connected to the switching system 300 by wire, and performs data and voice transmission and reception through a wired connection with the switching system 300. The deck base station 350 includes a physical layer (PHL) and a medium access control layer (MAC) in the deck protocol stack. Here, the physical layer performs a function of separating a radio spectrum into physical channels in a fixed frequency and time dimension, and the MAC layer selects physical channels and connects or disconnects the selected physical channel. ), Multiplexing and demultiplexing control information into slot information packet information along with upper layer information and error control information. In addition, the functions of the MAC layer may be classified into a cluster control function and a cell site function.

The deck base station interface board 370 is an Lc task of a Data Link Control (DLC) layer, that is, a transmit Lc task (Lc_tx) 371 in a DECT protocol stack. And a reception Lc task (Lc_rx) 373 and an MC-SAP task 375, and a message between the deck base station 350 and the call control module 311 of the switching system 300. (Message) It is in charge of the transmission. Here, the data connection control layer performs a processing function of making or disconnecting in response to a request of the network layer. In addition, the deck base station interface board 370 supports voice and data services through the deck base station 350 and a U-line interface.

The deck base station 350 includes a DBC 359, a TBC 357, and an MBC 355 task to configure a cluster while the deck terminal moves or sets up a new channel in a fixed position. It responds to (Channel setup) requests, reducing unnecessary load. Conventionally, the time required in response to the channel setup request is long, so that an error occurs in the middle of the required time, and when such an error occurs, a new channel setup for the deck terminal has to be attempted. will be. Thus, the time until the response to the channel setup is due to a deck spec requiring no error between the channel setup and the response time to the channel setup. It is possible to evaluate the stability.

The deck base station interface board 370 includes the MC-SAP 375 to perform an interface between the MBC 355 task of the deck base station 350 and the Lap-C 315 task in the switching system 300. In addition, the exchange system receives 5 bytes fragment data generated from the dec terminal through the Lc-rx 371 task from the dec base station 350 to perform an assembly operation to complete a frame. Transmit to a Lap-C task in main system 315 of 300. The Lc-tx task 371 also transmits frame data from the Lap-C to the TBC 357 task of the dec base station 350 in real time to receive a transmission completion message (DTR_ACK). A response message (ACK) is transmitted back to the Lap-C task. The Lap-C task performs flow control with the deck terminal and transmits a normal frame to the deck module of the exchange system 300 or receives a message from the deck module. In addition, the deck module has a mobility related entity and a call control related entity to respond to a functional service request for the deck system.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

The present invention as described above has the advantage of ensuring the stability of the channel setup and mobility with the deck terminal in a system using a protocol stack supporting a plurality of deck clusters. In addition, in the interface between the plurality of deck base stations, the same load is applied at all positions regardless of the position of the deck interface board where the base station is located, thereby eliminating the exceptional case of the deck service due to the load imbalance between the interfaces.

Claims (10)

In a system for performing an interface between multiple deck protocol stacks, An exchange system that performs call control and exchange operations, performs interface and control with system tasks for processing general calls, and interfaces with a deck protocol stack; A dec base station interface board for interfacing with the exchange system and a processor, performing connection and disconnection in response to a request of a network layer, and implementing a voice and data service through an interface with the dec base station; And a deck base station that performs voice and data communication with a deck terminal and implements a cluster function for the deck terminals by allocating and releasing radio channels for a call generated from the deck terminal. The method of claim 1, The exchange system includes a main system having a data connection control link connection procedure entity and a network layer and a deck module; An existing system task for performing interface and call control between the main system and the general switching system; System comprising a call control module for performing the incoming call processing. The method of claim 1, And the deck base station interface board and the deck base station communicate via a u-line interface. The method of claim 1, The deck base station; A burst mode controller for transmitting and receiving the voice data to and from the switching system in a predetermined time slot through a time division multiple access scheme; A physical layer that separates the radio spectrum into physical channels in fixed frequency and time dimensions; And a media access control layer that selects a specific physical channel from among the physical channels and connects or disconnects the selected physical channel to create, maintain, and release a bearer. The method of claim 4, wherein The media access control layer has a cluster control function and a cell site function. In a system for performing an interface between multiple deck protocol stacks, Data connection control link connection procedure Main system including entity and network layer and deck module, existing system task for performing interface and call control between the main system and general switching system, and call control for performing incoming call processing An exchange system composed of modules to interface with a deck protocol stack, A deck base station interface board that interfaces with the switching system, performs access and release in response to a request of the network layer, and implements voice and data services through an interface with the deck base station; And a deck base station that performs voice and data communication with a deck terminal and implements a cluster function for the deck terminals by allocating and releasing radio channels for a call generated from the deck terminal. The method of claim 6, And the interface between the exchange system and the deck base station interface board is performed through interprocessor communication. The method of claim 6, And the deck base station interface board and the deck base station communicate via a u-line interface. The method of claim 6, The deck base station; A burst mode controller for transmitting and receiving the voice data to and from the switching system in a predetermined time slot through a time division multiple access scheme; A physical layer that separates the radio spectrum into physical channels in fixed frequency and time dimensions; And a media access control layer that selects a specific physical channel from among the physical channels and connects or disconnects the selected physical channel to create, maintain, and release a bearer. The method of claim 9, The media access control layer has a cluster control function and a cell site function.