JPH04324728A - Data processor - Google Patents

Abstract

PURPOSE:To allow a reception side of an output data to surely detect it that an information bit of an interleaved reception data is omitted due to steal in the data processing unit for a system such as a digital automobile telephone system. CONSTITUTION:When the data from a mobile station 1 is interleaved and sent, a data received by a base station 2 is sent from a demodulation section 5 to a data processing unit 6 and a control section 8 detects steal. Data by the number of interleave processings are once stored in a memory 7 even in the data conversion processing not requiring an interleave delay, a data conversion processing section 9 converts the data into a public line data after interleave delay and the result is outputted from an output section 10. In the case of steal detection, the data stored in the memory 7 is replaced into a specific pattern surely detected by error detection after de-interleave at the reception side of an output data and the result is subjected to conversion processing and outputted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device in a mobile communication system.

0002

[Prior Art] This type of data processing device is a device provided at the base station side of a mobile communication system such as a digital car phone or a mobile phone system, and is a device that has a system-specific format that is transmitted and received between a mobile station and a base station. The conversion process is performed between the transmission data in the format used on public lines and the transmission data in the format used on public lines. The data to be converted is voice data or non-voice data such as FAX data.

FIG. 3 shows a schematic configuration of a mobile communication system equipped with a conventional data processing device. In FIG. 3, 21 is a mobile station and 22 is a base station. 23 and 24 are antennas, and 25 is a demodulator. 26 is a data processing device, which includes a data conversion processing section 27, a control section 28 and an output section 2.
It is equipped with 9.

Next, the operation of the above conventional example will be explained. Data transmitted from the mobile station 21 through the antenna 23 is received at the base station 22 through the antenna 24, and sent from the demodulator 25 to the data processing device 26. When data is interleaved into multiple frames and transmitted, the data processing device 26 does not perform processing that requires an interleaving delay such as audio decoding processing on this data, and instead transmits public line data in each frame. When performing conversion processing to format 0, the control unit 2
8, each frame is immediately converted into public line data while detecting stealth and outputted from the output section 29.

FIG. 4(a) is a diagram showing received data on the base station 22 side of data transmitted from the mobile station 21, with 20 ms as one frame. In this figure, the data is interleaved into four frames. Figure 4(b)
) indicates output data after data conversion by a conventional data processing device. The data processing device 26 detects a steal for each frame, immediately performs data conversion on a frame 30 that has not been stolen, and outputs it as a frame 32, and also performs data conversion on a frame 30 that has not been stolen and outputs it as a frame 32. For the information bits of frame 31, the stolen frame is replaced with data of a predetermined pattern, and then the information bits of frame 33 are
It is converted as follows and output to public line. At this time, there is no interleaving delay in the data processing device 26. Further, on the receiving side which receives this output data via the public line, after performing deinterleaving, error detection is performed on each piece of data.

[0006]

[Problems to be Solved by the Invention] However, in the conventional data processing apparatus described above, for a stolen frame such as frame 33 in FIG. 4(b), only the information bits of the frame are converted into data of a specific pattern Since the information bits of the data after deinterleaving are not a specific pattern on the receiving side that receives this output data via the public line, it is difficult to detect errors reliably. The problem was that there was no limit.

[0007] The present invention is intended to solve such conventional problems, and an object of the present invention is to provide an excellent data processing device that can reliably detect data in which information bits are missing due to being stolen. It is.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a data processing device with an FA for each frame.
A control unit that detects stealing due to a CCH (high-speed associated channel) or the like, a memory that stores received data interleaved into multiple frames for the number of interleavings, and a processing unit that converts data with an interleaving delay. and an output unit that outputs the converted data, and when the control unit detects a steal, information bits of multiple interleaved data included in the stolen frame, including past frames stored in the memory, are provided. , the output data is replaced with a specific pattern that can be reliably detected by error detection on the receiving side, and then converted and output.

[0009]

[Operation] Therefore, according to the present invention, the information bits of several pieces of interleaved data included in a frame in which information bits are missing due to stealing are replaced with data of a specific pattern in the data conversion processing section, and then converted. This has the effect that data with missing information bits can be reliably detected on the receiving side of the output data.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic configuration of a mobile communication system equipped with a data processing apparatus according to an embodiment of the present invention. In FIG. 1, 1 is a mobile station and 2 is a base station. 3 and 4 are antennas, and 5 is a demodulator. 6 is a data processing device, which includes a memory 7, a control section 8, and a data conversion processing section 9.
, an output section 10.

Next, the operation of the above embodiment will be explained. When data interleaved into multiple frames (temporarily 4 frames) is transmitted from the mobile station 1 through the antenna 3, the received data received through the antenna 4 at the base station 2 is sent from the demodulator 5 to the data processing device 6. Sent. Even when data conversion processing that does not require interleaving delay is performed on this received data, data for the number of interleaves (4 frames) is stored in the memory 7, and the control unit 8 performs interleaving while detecting stills. After a delay of 3 frames, the data conversion processing section 9 converts the data into public line data, and outputs it from the output section 10.

FIG. 2(a) is a diagram showing received data on the base station 2 side of transmission data sent from the mobile station 1, with 20 ms as one frame. In this figure, the data is interleaved into four frames. FIG. 2(b) shows output data after data conversion by the data processing device 6. The data processing device 6 detects stills for each frame, but does not immediately convert and output the received data, but after a delay of three frames, converts and outputs the data. At this time, the received data is frame 1
When stolen on FACCH (Fast Associated Channel) as in 1, 4 and 5 included in that frame 11
, 6, and 7, including the information bits of past frames stored in the memory 7, a specific pattern (interleaved into 4 frames) that can be reliably detected by error detection performed on the output data receiving side. data)
After replacing them with p, q, r, and s as in frame 13, each frame 12 is converted into frame 14 and output to the public line.

As described above, according to the above embodiment, the data conversion processing section with the interleaving delay converts several pieces of interleaved data included in a frame in which information bits are lost due to stealing over the public line. The receiving side that receives the output data replaces it with a specific pattern that can be detected by error detection after deinterleaving, and then converts it and outputs it to the public line. This has the effect that data with missing information bits due to stealing can be reliably detected at the same time.

[0014]

Effects of the Invention As is clear from the above embodiments, the present invention uses a data conversion processing unit with an interleaving delay to convert all of a plurality of interleaved data included in a stolen frame into Since the receiving side replaces the data with a specific pattern that can be detected by error detection after deinterleaving and then converts it before outputting it, the receiving side that receives this output data via the public line steals the information. This has the effect that data with missing bits can be reliably detected by error detection after deinterleaving.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of a mobile communication system equipped with a data processing device according to an embodiment of the present invention.

[Figure 2] (a
) is a diagram of received data input to the same device; (b) is a diagram of output data output from the same device.

[Figure 3] Schematic block diagram of a mobile communication system equipped with a conventional data processing device

[Figure 4] (a) is a diagram of received data input to the device (
b) is a diagram of the output data output from the same device.

[Explanation of symbols]

1 Mobile station 2 Base station 3 Antenna 4 Antenna 5 Demodulation section 6 Data processing device 7 Memory 8 Control section 9 Data conversion processing section 10 Output section 11 Reception data with steal detection 12 Reception data without steal detection 13 Frame 11 due to steal detection Output data processed by replacing all interleaved data with a specific pattern

Claims (1)

[Claims] Claim 1: A control unit that detects stealing of information bits for each frame, a memory that stores received data interleaved into multiple frames for the number of interleavings, and a data conversion processing unit that has an interleaving delay. and an output unit that outputs the converted data, and when the control unit detects a steal, it also outputs the information bits of the interleaved data included in the stolen frame and the past frames stored in the memory. Including,
A data processing device characterized in that the output data is replaced with a specific pattern that can be reliably detected by error detection or the like on the receiving side, and then converted and outputted.