KR100282800B1 - Apparatus and method for high level data link control frame processing in wireless subscriber network data communication matching device - Google Patents

Abstract

The present invention performs call processing by performing E1 / LAPD protocol processing on channel 16 in RPC of WLL system and rearranges the data of each traffic channel by each channel using time switch and then processes them in software by RPMI or The present invention relates to a high level data link control frame processing apparatus and method in a wireless subscriber network data communication matching device capable of transmitting IPC communication by IOMM. The first step of receiving an E1 frame from a WLL RPC and initializing a PBA. If the number is 16, the second step of performing HDLC protocol processing, LPAD protocol processing, if the channel number is not 16, the third step of rearranging the multi-frame for each channel in the time switch, the HDLC protocol internal processing When complete, the RLC interface module CPU processes the HDLC protocol of the traffic channel in software, and the interface module IPC. IPC data of the traffic data is performed in the bride, IPC data removal is performed in the IPC communication department if the fourth step of performing the IPC head removal and 10 base T in RPMI and performing the Internet service, the internal processing of the HDLC protocol is not completed. In the fifth step of removing the IPC head from the IOMM / RPMI, processing the HDLC protocol of the traffic channel, and performing the Internet service after performing the 10 base T, if the internal processing of the HDLC protocol is not completed, each of the IOMM / RPMI The sixth step of performing HDLC protocolization for each channel, performing 10baseT, and performing Internet service is performed.

Description

Apparatus and method for high level data link control frame processing in wireless subscriber network data communication matching device

The present invention relates to a wireless subscriber network (WLL) system. In particular, the base station controller (RPC) of the WLL system performs E1 / LAPD protocol processing on channel 16 to perform call processing and to input HDLC-framed traffic channels. The present invention relates to a high level data link control frame processing apparatus and method in a wireless subscriber network data communication matching device that rearranges data for each channel using a time switch and then processes the data in software so that the data can be transmitted via RPM or IOMM through IPC communication. .

In general, the WLL system is a communication network that provides high-speed data image and multimedia information as well as POTS service such as voice / information communication / fax by connecting wirelessly between a network and a terminal for providing a telephone service by wire, not wirelessly. It has a structure similar to a digital cellular system such as a personal communication service (PCS).

In particular, among the WLL system standards of telecom operators such as Hanaro Telecom and Dacom, the interface between RPC (Radio Port Controller) and IWF (Inter Working Function) is E1 / LAPD (Link Access Procedures on the D-). channel).

That is, LAPD processing of call processing and control information on channel 16 is transmitted and received, and the remaining traffic information is allocated to 30 channels.

Here, channel 16 refers to a channel containing LAPD processed information, that is, control information and call processing information of each data information.

In particular, in the connection standard between the RIU and the IWF, call processing and control information is transmitted without LAPD processing at 16, but traffic information is transmitted and received by performing LAPW processing at the RIU.

The method of processing traffic information processed by HDLC (High-level Data Link Control Procedure) frame in RIU has not been proposed yet, and the shape and function of RPC interface device in IWF is determined by how to process it. .

The overall shape depends on where and how to remove and process what is required for HDLC frame transmission, such as the HEAD and cyclic redundancy check (CRC) check bits of the HDLC frame.

The present invention has been devised in response to such a situation. In the RPC of the WLL system, the call processing is performed by performing E1 / LAPD protocol processing on channel 16 and using the time switch for data of each traffic channel that is input by HDLC frame. The present invention provides a high level data link control frame processing apparatus and method in a wireless subscriber network data communication matching device that can be rearranged by each channel and then processed by software to be transmitted through IPC communication to RPMI or IOMM.

1 is a block diagram showing the configuration of the present invention WLL IWF

2 is a view showing a relationship between the present invention IWF RPC interface module and the peripheral block;

3 is a detailed configuration diagram of E1-IF of FIG.

4 illustrates a channel allocation method according to the present invention.

5 is a flowchart of operation according to the present invention.

<Explanation of symbols for main parts of drawing>

1: IWF processor 2: RPC interface module

3: Access Server 4,12-15: IOMM

10: IWF 11: E1-IF

18: RPMI 21: E1 primer and transceiver

22: time switch 23: IPC communication unit

24: CPU 25: EPLD

26: memory 27: SIO

The apparatus of the present invention for achieving the above object, in the IWF RPC interface module of the wireless subscriber network, performs the synchronization and CRC check of the TTL E1 frame input through the E1 line interface unit and use as internal and external reference clocks. E1 primer and transceiver that extracts and transfers clocks of 8K and 2.048 Mbps so as to be received, a time switch that receives 2B signals from the E1 primer and transceiver, rearranges traffic information for each subscriber, and sends them to the CPU; IPC communication unit connected to the location and data bus to perform IPC processing, and the traffic information received through the time switch to remove the HDLC frame by software to send data to the IOMM or RPMI through the IPC communication unit, control of various chips CPU for performing maintenance and selection signals of various chips operating inside the hardware board It receives and extracts the EPLD that acts as a raw and clock divider, a memory that stores data, an SIO that communicates internally via RS-232, and 4 channels of 4E1 input. And HDLC controller to de HDLC frame by hardware.

In addition, the method of the present invention for achieving the object, the first step of initializing the PBA by the RPC interface module in the power-on state, receiving the E1 frame in the WLL RPC, and the channel number received in the WLL RPC If it is determined that 16 is 16, the second step of performing HDLC protocol processing, LPAD protocol processing, and if the channel number is not 16 in the second step, rearranging the multi-frame for each channel in the time switch After performing the third step and performing the third step, it is determined whether the internal processing of the HDLC protocol is completed, and when it is completed, the HDLC protocol of the traffic channel is processed in software by the RPC interface module CPU, and the traffic data is processed by the interface module IPC communication unit. Fourth performing IPC data, performing IPC head removal and 10-baseT or 100-base data from RPMI, and performing Internet services. If the internal processing of the HDLC protocol is not completed in the fourth step, the IPC communication unit performs IPC data, removes the IPC head from the IOMM / RPMI, processes the HDLC protocol of the traffic channel, If the internal processing of the HDLC protocol is not completed in the fifth step of performing Internet service after performing 100-base data, and performing the HDLC protocol for each channel in IOMM / RPMI, and performing 10baseT or A sixth step of performing Internet service after performing 100 database data is characterized in that it consists of.

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

1 is a WLL IWF 10 configuration of the present invention, an IWF processor 1 having an IWF internal data management and call control function, an error and flow control function between an RIU and an IWF, and switching and router control functions between IWF internal modules. A RPC interface module 2 having a base station controller, a trunk line matching function, and an LPAD signaling protocol function, an access server 3 connected between the IWF processor 1 and the information exchange network 5 to interface with the information exchange network; It consists of IOMM 4 having data generation and reporting function, statistics and measurement function, and RPOM matching function. In the figure, reference numeral 6 denotes RPC, 7 RPOM, and 8 charging center.

Figure 2 shows the relationship between the IWF RPC interface module and the peripheral block, which is responsible for up to four E1 frames in the PRC (6), a small capacity switch capable of switching 128 channels to handle 128 channels per board E1-IF (11) having a connection, a plurality of IOMM (12-15) is connected to the E1-IF (11) via an 8M highway, through the 100BaseT to the output terminal of the IOMM (12-15) The HUB 16 is connected.

In addition, RPMI 17 connected to the RPOM through the cell bus and RPMI 18 connected to the charging center are connected to the IOMM 12, and reference numeral 19 in the figure denotes a CDU (Clock Distributor Unit).

Here, the RPMI (17) (18) is a unit for transmitting and receiving data input via the IPC unit to the 10 base T.

FIG. 3 is a detailed configuration of E1-IF 11 in FIG. 2, which performs synchronization and CRC checking of a TTL E1 frame input through an E1 line interface unit and uses 8K and 2.048 Mbps for use as an internal and external reference clock. E1 primer and transceiver 21 for extracting and delivering the clock of the clock, a time switch 22 for rearranging the remaining traffic information for each subscriber, and then sending it to the CPU, and connecting the time switch 22 and the data bus to the IPC. IPC communication unit 23 performing the processing, and traffic information received through the time switch 22 by removing the HDLC frame by software to send data to the IOMM or RPMI through the IPC communication unit 23, CPU 24 which performs control and maintenance, EPLD 25 which acts as a selection signal generation and clock division circuit of various chips operating inside the hardware board, and memo as storage means for storing data (26), the SIO (Serial Input-Output) (27) to communicate with the internal through the RS-232, and receives the four 16 channels of 4E1 from the E1 primer and transceiver (21) It consists of an HDLC controller 28 which extracts and de-HDLC frames the hardware.

Referring to the operation of the present invention configured as described above is as follows.

First, as shown in Figure 1, the processor of the IWF (10) is the IWF (10) own data management and call control function, the error and flow control function between the RIU and the IWF (10), switching and routers between the internal module of the IWF (10) It has a control function and the RPC interface module 2 has a base station controller, relay line matching function, and LPAD signal protocol function.

The interface module of the information exchange network 5 has an access server function, an information exchange network and an Ethernet matching function.

The IOMM 4 has billing data generation and reporting functions, statistics and measurement functions, RPOM matching functions, and the like.

2 is a basic shape of an IWF having an RPC interface module proposed in the present invention. Basic functions are as follows.

That is, the LARD processed call processing information received on the channel 16 by receiving the E1 frame data input from the RPC 6 and the channel 16 information in the HDLC framed traffic information are processed by the HDLC handler for LARD protocol processing. The remaining traffic information is rearranged for each channel by the time switch 22.

Here, each subscriber is pre-assigned one of the E1 frame channels on the IWF side, and removes unnecessary portions (e.g., preg bits, CRC check bits) from the HDLC frame with software and removes the actual payload. The data is extracted and sent to IOMM 4 or RPMI 17 or 18 using IPC communication.

E1-1F 11 of FIG. 2 is responsible for up to four E1 frames, and has a small capacity switch capable of switching 128 channels to handle 128 channels per board.

It also has one H / W HDLC handler chip to handle channel 16 on 4E1.

Here, the HDLC handler of the E1-1F 11 rearranges the data for each channel from the data allocated and input for each channel as shown in FIG. 4 to perform HDLC protocol processing in software by the CPU 24 to perform an IPC communication unit ( 23) (in this case using cellbus, which communicates via the backboard as a parallel bus with a total of 32 data lines) to the RPMI (17) (18) or IOMM (12-15) 10 base T and 100 base T can be connected, and the data rearranged by the time switch can be directly transmitted to the RPMI (17) 18 or the IOMM (4) to be processed in software.

3 is a detailed block diagram of an RPC interface module having one HDLC handler and one time switch having a capacity of 128 channels. The E1 interface line converts a RIP / RING signal input to an E1 line into a TTL signal.

The E1 primer and the transceiver 21 perform synchronization and CRC checking of the TTL E1 frame input through the E1 line interface unit, and extract and transmit clocks of 8K and 2.048 Mbps so that they can be used as internal and external reference blocks. .

In addition, one HDLC controller 28 receives 4 input channels 4 of 4E1, extracts them, and de-HDLC frames the hardware.

The time switch 22 rearranges the remaining traffic information for each channel (by subscriber) and then sends it to the CPU 23.

The CPU 23 performs LAPD processing for channel 16 and removes the HDLC frame from the traffic information received through the time switch 22, and transmits the data through the IPC communication unit 23 to the IOMM 4 or the like. It is sent to RPMI (17) (18), and performs the control and maintenance of various chips.

The EPLD 25 operates as a selection signal generation and clock division circuit of various chips operating inside the hardware board.

The memory 26 such as ROM, RAM, or SRAM, which is a storage means, is used when downloading various operations, data, and application software from the board, and the SIO 27 communicates with the inside through RS-232. To help.

5 is an operational flow for software processing of the RPC interface module in the IWF system according to the present invention. In the power-on state, the PBA is initialized by the RPC interface module, and the WLL RPC 6 receives an E1 frame (S1, S2)

Accordingly, the WLL RPC 6 determines whether the received channel number is 16 (S3), and if it is 16, performs HDLC protocol processing (S4), and performs LPAD protocol processing (S5).

If the channel number is not 16 in step S3, the time switch 22 rearranges the multi-frames for each channel (S6).

If it is determined that the HDLC protocol internal processing is completed (OK), and if it is completed, the RLC interface module CPU 24 processes the HDLC protocol of the traffic channel in software (S8), and the traffic data is transmitted from the interface module IPC communication unit 23. IPC data conversion is performed (S9).

Next, the IPC head is removed from the RPMI 17 and 18 and 10 base T or 100 base data is performed (S10), and the Internet service is performed (S11).

That is, when the internal processing of the HDLC protocol is completed, the case 1 is performed. When the HDLC protocol processing is performed inside the IWF interface, the HDLC protocol rearranges the data rearranged by the time switch 22 by the software in the CPU 24 for each channel. The flag head, end, and CRC bits of the frame are removed, and the actual traffic data is extracted. The extracted data is transmitted by IPC data to be sent by the IPC communication unit 23 to the IPC unit of IOMM / RPMI.

The IPC part of IOMM / RPMI removes the IPC head and end and extracts the actual data to make 10-base T or 100-base T data and interface it to the Internet.

In this case, the load on the interface hardware is high, but it reduces the load on the IOMM / RPMI.

On the other hand, if the internal processing of the HDLC protocol is not completed in step S7, the IPC communication unit 23 performs IPC data (S12), removes the IPC head from IOMM / RPMI (S13), software of the traffic channel After processing the HDLC protocol (S14), performing 10-base T or 100-base data (S15), and performing an Internet service (S16).

That is, the step S12-S16 is the case of the case 2, the case of using the internal high-speed parallel IPC communication unit.

This is the case that IPC is used as the interface between boards, so each board must be IPCized.

At this time, since there is an IPC unit for LAPD protocol data transmission, no additional hardware is required.

On the other hand, if the HDLC protocol internal processing is not completed in step S7 as a third case, the HDLC protocol for each channel is performed in the IOMM / RPMI unit (S17), after performing 10baseT or 100base data (S18) Perform an internet service (S19).

In the case of S17-S19, the case 3 uses the highway using the time switch 22, and there is a time switch interface unit for each board, so that the load for the IPC can be reduced in software.

That is, the case 1 to case 3 can be selectively used according to the system configuration.

As described above, the present invention performs call processing by performing E1 / LAPD protocol processing on channel 16 in a base station controller (RPC) of a WLL system, and uses a time switch to output data of each traffic channel input by HDLC frame. After rearranging each channel, it can be processed by software and transmitted through IPC communication to RPMI or IOMM.

Claims (2)

An E1-IF (11) is connected through E1, and the E1-IF (11) is an IWF RPC connected to RPMI (17) (18) and IOMM (12-15) via RPC (6) and Cellbus. In a WLL system including an interface module, The E1-IF 11 performs an synchronization and CRC check of the TTL E1 frame input through the line interface unit and extracts and transmits 8K and 2.048 Mbps clocks to be used as internal and external reference clocks. And a transceiver 21, A time switch 22 which receives the 2B signal from the E1 primer and the transceiver 21 and rearranges the traffic information for each subscriber to the CPU; An IPC communication unit 23 connected to the time switch 22 and the data bus to perform IPC processing; CPU 24 which removes the HDLC frame from the traffic information received through the time switch 22 by software, sends the data to the IOMM or RPMI through the IPC communication unit 23, and controls and maintains various chips. Wow, An EPLD 25 that operates as a selection signal generation and clock divider circuit for various chips operating inside the hardware board, A memory 26 for storing data, SIO 27 for communicating with the inside through RS-232, Wireless subscriber network data communication comprising an HDLC controller 28 which receives 4 channels 16 of 4E1 from the E1 primer and transceiver 21, extracts them, and de HDLC frames them in hardware. High level data link control frame processing device in matching device. A base station controller interface module of a wireless subscriber network data communication matching device, A first step of initializing the PBA by the RPC interface module in the power-on state and receiving an E1 frame from the WLL RPC; A second step of determining whether the channel number received from the WLL RPC is 16 and performing HDLC protocol processing if the channel number is 16, and performing LPAD protocol processing; A third step of rearranging the multiframes for each channel in the time switch if the channel number received in the second step is not 16; After performing the third step, it is determined whether the internal processing of the HDLC protocol is complete, if completed, the HDLC protocol of the traffic channel is software-processed by the RPC interface module CPU, and the IPC data of the traffic data is performed by the interface module IPC communication unit. Removing the IPC head from RPMI, performing the 10 base T or 100 base data, and performing the Internet service, If the internal processing of the HDLC protocol is not completed in the fourth step, the IPC communication unit performs IPC data, removes the IPC head from the IOMM / RPMI, processes the HDLC protocol of the traffic channel, and converts 10BaseT or 100base data. After performing the fifth step of performing the Internet service, If the internal processing of the HDLC protocol is not completed in the fourth step, the HDLC protocolization for each channel is performed in IOMM / RPMI, and the sixth step of performing Internet service after performing 10baseT or 100base data is performed. A high level data link control frame processing method in a wireless subscriber network data communication matching device, characterized in that.