KR20040075515A - Data communication device and method between modem and decoder of base station in wireless communication system - Google Patents

Abstract

PURPOSE: A data communication device and method between a base station modem and a decoder of a mobile communication system are provided to enhance data processing rate through effective data processing. CONSTITUTION: A decoder checks whether there is data to be decoded in modems(302). If there is data to be decoded, the decoder generates an address to be stored in a memory and inputs it to the modems(304). The decoder controls a DMI_WEZ(Data Management Interface_Write Enable Zero) terminal so that data can be inputted to the memory(306). The decoder controls the modems to output the data to the memory(308). The decoder determines whether data of every channel of the modems is outputted(310). If data of every channel is outputted, the decoder release the reading available state of the memory(312). The decoder releases the output available state of the modems(314).

Description

DATA COMMUNICATION DEVICE AND METHOD BETWEEN MODEM AND DECODER OF BASE STATION IN WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a base station apparatus and a control method thereof of a mobile communication system, and more particularly, to a method and apparatus for data communication between a modem and a decoder of a base station.

In general, a base station of a mobile communication system is located between a mobile station and a mobile switching center (MSC). Such a base station performs transmission and reception of traffic data through a wireless channel with a mobile station. The base station then transmits / receives data with the mobile switching center through a wired link. In addition, one base station has a predetermined wireless area, and communication with a mobile station located in the area is performed through a wireless channel, and therefore, a modem and a decoder must be provided. That is, the base station of the mobile communication system includes a plurality of modems for processing mobile station signals of multiple subscribers. 1 is a block diagram illustrating an apparatus for data communication between a base station modem and a decoder in a general mobile communication system.

Referring to FIG. 1, a plurality of modems 130, 131, and 132 are configured in the base station 100 to process signals for a plurality of mobile stations. The modems 130, 131, and 132 perform demodulation and decoding of traffic for communication with the mobile terminal. In this case, each of the modems 130, 131, and 132 processes the received signal in units of 1.25 ms, which is a power control group (PCG) unit, and has many channels configured therein. The decoder 110 decodes the data demodulated by the modems 130, 131, and 132. However, the decoder 110 processes data in units of frames (20 ms). Accordingly, in order for the decoder 110 to decode the demodulated data in units of the power control group, an apparatus for temporarily storing a large amount of data is required.

However, since the capacity of the buffer configured in the modems 130, 131, and 132 is limited, it is not possible to store all one frame 20ms as described above. Therefore, a memory 120 for temporarily storing the demodulated data before decoding is configured separately outside the modems 130, 131, and 132. In addition, since the decoder 110 transmits / receives data to the memory 120 and each other as a separate port, a dual port or two ports are used. In the base station 100 configured as described above, conventional data processing between the modems 130, 131, and 132 and the decoder 110 is performed as follows.

First, the decoder 110 reads the demodulated data from the modems 130, 131, and 132, and stores the demodulated data in the memory 120 again. The decoder 110 then reads back the data stored in the memory 120 to decode the data.

According to such a method, since the decoder 110 should store the data read from the modems 130, 131, and 132 in the memory 120 and read it again, the procedure is duplicated and efficiency is reduced. there is a problem. In addition, when the data reading operation and the storage operation are separately performed between the decoder 110 and the memory 120, there is a problem that the dual port or two port memory should be configured.

Accordingly, an object of the present invention is to provide an apparatus and method capable of efficiently processing data between a base station modem and a decoder in a mobile communication system.

Another object of the present invention is to provide a method for efficiently processing data between a base station decoder of a mobile communication system and a memory for temporarily storing data for decoding.

The present invention for achieving the above object comprises a base station modem and a decoder in a mobile communication system comprising at least one modem, a memory for temporarily storing a demodulated signal from the modem, and a decoder for decoding the demodulated signal In the data communication device, the modem, the memory and the decoder share an address bus.

The present invention for achieving the above object is characterized in that the decoder comprises the step of temporarily storing the demodulated data from the modem in the memory, and the decoder reads to decode the data stored in the memory do.

1 is a block diagram illustrating a data communication device between a base station modem and a decoder in a general mobile communication system;

2 is a block diagram of a data communication device between a base station modem and a decoder of a mobile communication system according to an embodiment of the present invention;

3 is a flowchart illustrating a data communication method between a modem and a memory according to an embodiment of the present invention;

4 is a flowchart illustrating a data communication method between a decoder and a memory according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that reference numerals and like elements among the drawings are denoted by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In the following description of the present invention, detailed descriptions of related known functions or configurations will be omitted when it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention.

2 is a block diagram of a data communication device between a base station modem and a decoder of a mobile communication system according to an exemplary embodiment of the present invention. Hereinafter, a configuration and operation of a data communication device between a base station modem and a decoder of a mobile communication system according to the present invention will be described in detail.

A data communication device between a base station modem and a decoder of a mobile communication system according to the present invention includes a modem (230, 231, 232) for performing demodulation on a signal received at a base station and a memory for temporarily storing the demodulated data before decoding it. 120 and a decoder 110 for decoding the demodulated data. At this time, each modem (MODEM #) output enable output (OEZ) terminal of the decoder 210 is connected to the output enable (/ OE :) terminal of the respective modem (230, 231, 232), the decoder ( The data management interface address (DMI_A) terminal of 120 is connected to an address (A) terminal of each of the modems 230, 231, and 232. In addition, the data management interface data (DMI_D: Data Management Interface_Data) terminal of the decoder 210 is connected to the data (D :) terminal of each of the modems 230, 231, and 232, and the data of the decoder 120. A management interface clock (DMI_CLK) terminal is connected to a clock (CLK) terminal of each of the modems 230, 231, and 232. In addition, a data management interface output enable (DMI_OEZ) terminal of the decoder 120 is connected to an output enable zero (OEZ) terminal of the memory 220 and is connected to the decoder 120. A Data Management Interface Write Enable Zero (DMI_WEZ) terminal is connected to a Write Enable Zero (WEZ) terminal of the memory 220. Hereinafter, for the sake of clarity, the description will be given on the assumption that there are three modems. However, the number of modems configured by operators may be different.

The modems 230, 231, and 232 demodulate the signals received from the mobile terminal and process the traffic in each channel. In addition, unlike the conventional technology, the decoder 210 is configured not to directly read data from the modems 230, 231, and 232 in order to decode the demodulated data. To this end, each of the modems 230, 231, and 232, the decoder 210, and the memory 220 share an address bus 241, a data bus 242, and the like. It is possible to use a single port memory (Single Port Memory) because it is synchronized by the 220). That is, each of the modems 230, 231, 232 is activated by the decoder 210, and demodulation of data received by the activation is performed. Each modem 230, 231, 232 also receives an address to store in the memory 220 from the decoder 210. At this time, the decoder 220 activates the input of the memory 220. That is, the memory 220 transitions to a state in which data can be stored. The demodulated modem among the modems 230, 231, and 232 stores the demodulated data in the memory 220 according to the received address at the time occupied by the bus. This control process will be described in more detail in the control flowchart of FIG. 3 to be described later.

3 is a flowchart illustrating a data communication method between a modem and a memory according to an exemplary embodiment of the present invention. Hereinafter, a data communication method between a modem and a memory according to an embodiment of the present invention will be described in detail with reference to FIG. 3.

First, in step 302, the decoder 210 generates an interrupt signal at a predetermined time and searches whether the data to be decoded in the modems 230, 231, and 232 is generated using the interrupt signal. If data to be decoded is generated in the modems 230, 231, and 232, step 304 is performed. However, if no data is generated in the modems 230, 231, and 232, the decoder 210 repeats step 302.

In step 304, the decoder 210 generates an address to be stored in the memory 220 and inputs it to the modems 230, 231, and 232 through an address bus 241. The address consists of a modem number, a channel number of a modem, a PCG number, a data symbol address of a modem buffer, and the like. After transmitting the address to the modems as described above, the decoder 210 controls data input to the memory 220 in step 306. That is, the output of the data management interface write activation (DMI_WEZ) terminal is set to " 0 " to activate the data in the memory 220. In operation 308, the decoder 210 controls the modems 230, 231, and 232 to output data to the memory 220. That is, a signal of "0" is output so that the modem to be decoded is activated among the activation (MODEM # _OEZ) terminals of each modem described in FIG. The memory 220 can then store data carried on a data bus 242 while the modems 230, 231, 232 output data. The method described above has been described on the assumption that the state value is '0' and becomes active when the state value is '0' due to the active low condition. This will be described in the same manner below. However, it is noted that this is only a design specification.

In step 310, the decoder 210 determines whether data of all channels of the modems 230, 231, and 232 are output. If data remains on the channels of the modems 230, 231, and 232, the step 304 is repeated. However, if all data on the channels of the modems 230, 231, and 232 are output, the process proceeds to step 312. In other words, the inspection of step 310 is a process to prevent residual data from remaining in the demodulation modems.

In operation 312, the decoder 210 releases the readable state of the memory 220 because the memory 220 no longer has data to be read from the modems 230, 231, and 232. That is, the output of the data management interface write activation (DMI_WEZ) terminal is " 1 " to prevent data writing to the memory 220. In operation 314, the decoder 210 releases the output enable state of the modems 230, 231, and 232 because data to be output no longer remains in the modems 230, 231, and 232. That is, the modems are deactivated by setting the output of each modem (MODEM # _OEZ) terminal to "1". After performing this process, the decoder 302 returns to step 302 to search for the modem using an interrupt signal.

4 is a flowchart illustrating a data communication method between a decoder and a memory according to an exemplary embodiment of the present invention. Hereinafter, a process of reading data from a memory for decoding, i.e., decoding data, according to the present invention will be described in detail with reference to FIG.

First, in step 402, the decoder 210 determines whether the data stored in the memory 220 is in a state to decode. At this time, if one frame of data is stored in the memory 220, the decoder 210 determines that the decoding is to be performed. If the decoder 210 determines that the decoder 210 is not yet in the decoding state, step 402 is repeated. However, if the data stored in the memory 220 is to be decoded, step 404 is performed. In operation 404, the decoder 210 reads data from the memory 220 (Data Management Interface Output Enable Active: DMI_OEZ = 0).

In operation 406, the decoder 210 determines whether data is currently being transmitted from the modems 230, 231, and 232 to the memory 220. If data is currently being transmitted, the controller waits until the transmission procedure is completed. However, if the transmission is completed, step 406 is performed. In step 408, the decoder 210 repeats step 406 until all data is read from the memory 220. However, when the decoder 210 reads all the data from the memory 220, the decoder 210 returns to step 402 and waits until the decoder 210 is ready to perform decoding.

In addition, when any one of the modems 230, 231, and 232 is transmitted to the memory 220 while the decoder 210 receives data from the memory 220, the decoder 210 may generate a data. Stop receiving data. The data is transmitted from the modem requiring data transmission to the memory 220 and recorded. That is, priority is given to writing to the memory 220 in the modem. The reason for giving priority to recording in this manner is that the modem must continuously demodulate for a short time as described above. Therefore, the decoder 210 performs a process of reading data back from the memory 220 after the transmission of data from the modem to the memory 220 is completed.

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 determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention has an advantage of increasing data processing speed through efficient data processing between a base station modem and a decoder of a mobile communication system. In addition, the present invention has the advantage that the interface between the base station modem and the decoder of the mobile communication system can be easily configured and downsized.

Claims (5)

And a base station capable of communicating with at least one mobile terminal, wherein the base station includes modems for modulating / demodulating data of a mobile terminal communicating therein and a decoder for decoding data demodulated in the modems. In the processing apparatus for receiving data from the mobile terminal in the base station of the mobile communication system, The modems demodulating data input based on a modem activation signal and outputting the data to a memory at predetermined time points; A memory for storing data inputted from the modem and outputting the stored data to the decoder when the stored data is requested from a decoder; And a decoder that activates the modems when data to be demodulated is received, controls the storage of data output from the modems to the memory, and receives and decodes the data stored in the memory during decoding. The apparatus described above. The method of claim 1, A data bus for transferring data output from the modem to the decoder or the memory; And an address bus for delivering an address output from the decoder to the modems or the memory. The method of claim 2, And said memory is comprised of a single port memory. And a base station capable of communicating with at least one mobile terminal, wherein the base station includes modems for modulating / demodulating data of a mobile terminal communicating therein and a decoder for decoding data demodulated in the modems. In the mobile communication system in the processing method when receiving data from a mobile terminal, Activating and demodulating the modems when receiving data from the mobile terminal, transmitting an address for storing demodulated data in the modem through an address bus, and storing output data of the modem in a memory through a data bus; And decoding the data stored in the memory through the address bus and the data bus when the data stored in the memory can be decoded. The method of claim 4, wherein Transmitting, by the modem, the data to be transmitted to the memory when data to be transmitted from the modem to the memory is generated while the decoder is receiving data from the memory; And after the transmission of the data is completed, the decoder receiving data from the memory.