JP3306033B2 - Data transmission / reception apparatus and data transmission / reception method of time division multiple access system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a time division multiple access (Time Division Multiple Ac).
ess: hereinafter referred to as “TDMA”).

[0002]

2. Description of the Related Art A number of data transmission / reception devices using the TDMA system have been proposed (for example, see Japanese Patent Application Laid-Open No.
-203632, JP-A-3-293830, JP-B-6-103866, and Patent No. 26639
No. 07 publication). Transmitters and receivers based on the TDMA system are often used for mobile communication, particularly point-to-multipoint wireless communication.

[0003] In such wireless communication by the TDMA system, generally, a fixed-length frame is divided into a plurality of slots, and a base station allocates a slot to each terminal station and performs communication. I have.

In recent years, the ETSI BRAN has
PERLAN / 2 is being standardized, but Dyna is a system for dynamically allocating slots.
A mic slot assignment (DSA) scheme has been proposed. In the DSA method, a frame is divided into a large number of slots, and the number of slots assigned to each frame is changed according to the transmission capacity, thereby improving the efficiency of frame use.

[0005] It has also been proposed to change the modulation scheme and the error correction capability according to the propagation conditions depending on the terminal.

In order to perform such a complicated communication, it is necessary to control each functional block in accordance with the data input timing. For this purpose, it is necessary to provide a plurality of counters. However, the data transmission / reception device has to be complicated.

FIG. 2 shows an example of such a data transmitting / receiving apparatus.
Shown in

The data transmitting / receiving apparatus shown in FIG.
1; a receiving unit 51; and a control unit 61 that instructs the transmitting unit 41 and the receiving unit 51 to operate.

The transmitting section 41 includes a plurality of transmission buffers 5a.
-5n, and a transmission buffer 5a-
5n, a baseband processing unit 6 that receives data from each of the baseband units and performs baseband processing; a modulation unit 7 that receives baseband processed data from the baseband processing unit 6;
An RF unit 8 for receiving the data modulated by the modulation unit 7 and transmitting the data to the partner station.

The receiving section 51 includes an RF section 9 and a demodulating section 10
And a reception buffer unit 12 including a plurality of reception buffers 12a to 12n.

The control unit 61 generates a fixed-length frame with the control information management unit 1 that manages operation parameters such as the transmission / reception timing of each terminal and each channel, the FEC coding rate, and the modulation / demodulation method. A frame counter unit 2 for outputting the control information and a control information management unit 1
And a timing control unit 4 for controlling the transmission timing of the operation parameter from the CPU.

[0012]

In the data transmitting / receiving apparatus shown in FIG. 2, data is transmitted to functional blocks in baseband processing units 6, 11 and other components 5, 7, 8, 9, 10, 12. When inputting, it is necessary to use the timing control unit 1 to individually control the timing of data input for each functional block. For this reason, it is necessary for the data transmitting / receiving device to have a plurality of counters, and the data transmitting / receiving device has to be complicated.

The present invention has been made in view of such a problem in a conventional data transmitting / receiving apparatus, and does not require individual timing control for each functional block. An object of the present invention is to provide a data transmission / reception device of a time-division multiple access system that enables simplification.

It is another object of the present invention to provide a data transmission / reception method based on a time division multiple access system which eliminates the need to individually perform timing control on each functional block.

[0015]

In order to achieve this object, the present invention provides a data transmitting / receiving apparatus or a data transmitting / receiving method for communicating with a plurality of terminals using a plurality of channels by using a TDMA system. Using information describing operation contents required for each channel (hereinafter, referred to as “TAG”), operation management in the data transmission / reception device is performed based on the TAG.

More specifically, of the present invention, a first aspect of the present invention is a data transmission / reception apparatus for communicating with a plurality of terminal apparatuses via a plurality of channels by a time-division multiple access method. An information generating unit that generates information describing the content, and an information adding unit that adds the information generated by the information generating unit to the transmission / reception data,
Transmission / reception data to which information is added is sequentially transferred between functional blocks, and each functional block operates in accordance with an instruction of information included in the transmission / reception data. I will provide a.

According to a second aspect of the present invention, there is provided a data transmitting / receiving apparatus for communicating with a plurality of terminal apparatuses via a plurality of channels by a time division multiple access method, wherein information describing operation content for each functional block is generated. A generating unit, wherein the information generated by the information generating unit is independently transferred sequentially between each functional block, and each functional block operates according to the instruction of the information. Provided is a data transmission / reception device of a division multiple access system.

According to a third aspect of the present invention, there is provided a data transmission / reception apparatus of a time division multiple access system, comprising a transmission unit, a control unit, and a reception unit, wherein the control unit is configured to control operations of the transmission unit and the reception unit. , The control unit includes: an information generation unit that generates information describing the operation content of each of the function blocks of the transmission unit and the reception unit; and the transmission unit transmits the information generated by the information generation unit to transmission / reception data to be transmitted to the transmission unit and the reception unit. Transmission / reception data to which information has been added is sequentially transferred between functional blocks, and each functional block operates in accordance with an instruction of information included in the transmitted / received data. A time-division multiple access data transmission / reception device is provided.

According to a fourth aspect of the present invention, the information adding unit in the transmitting unit includes a plurality of transmission buffers for storing transmission data for each channel, and a request for transmission data for each of the transmission buffers. And a selector for multiplexing transmission data.

According to a fifth aspect of the present invention, the information adding unit in the receiving unit includes a plurality of receiving buffers for storing received data for each channel, and a selector for distributing the received data to each of the receiving buffers. , Can be configured.

As described in claim 6, the selector can be configured not to store the reception data in the reception buffer when the information includes the data of the detection of the reception error.

According to a seventh aspect of the present invention, there is provided a data transmission / reception apparatus of a time division multiple access system, comprising a transmission unit, a control unit, and a reception unit, wherein the control unit is configured to control operations of the transmission unit and the reception unit. The control unit includes an information generation unit that generates information describing the operation content of each of the function blocks of the transmission unit and the reception unit, and the information generated by the information generation unit alone is used between the function blocks. A time-division multiple access data transmission / reception apparatus is provided, wherein the data transmission / reception is sequentially performed, and each functional block operates in accordance with an instruction of information.

According to another aspect of the present invention, in a data transmitting / receiving method for transmitting / receiving data to / from a plurality of terminal devices via a plurality of channels by a time-division multiple access method, information describing an operation content for each functional block is generated. The present invention provides a data transmission / reception method, comprising: a step of adding information to transmission / reception data; and a step of sequentially transmitting the transmission / reception data to which information is added between functional blocks.

According to a ninth aspect of the present invention, in a data transmitting / receiving method for transmitting / receiving data to / from a plurality of terminal devices via a plurality of channels by a time division multiple access method, information describing an operation content for each functional block is generated. A method for transmitting and receiving data, comprising the steps of: sequentially transferring information between functional blocks by itself;

[0025]

FIG. 1 is a block diagram of a TDMA-type data transmitting / receiving apparatus according to an embodiment of the present invention.

The data transmission / reception device according to the present embodiment includes a transmission unit 141, a reception unit 151, and a control unit 161 that issues an operation instruction to each of the transmission unit 141 and the reception unit 151.

The TDMA data transmission / reception device uses fixed-length frames, and the base station notifies each terminal of the type and timing of transmission / reception to each terminal, and performs communication based on the notification information. The control unit 161 uses the notification information to
An operation instruction is given to the transmission unit 141 and the reception unit 151.

The transmission section 141 includes a plurality of transmission buffers 105a-105n for storing transmission data for each channel.
A transmission buffer unit 105 comprising: a selector 113 for requesting transmission data and multiplexing (MUX) transmission data for each of the transmission buffers 105a to 105n;
Baseband processing unit 1 that receives data to which a TAG is added from selector 113 and performs baseband processing
06, a modulator 107 that receives baseband-processed TAG-attached data from the baseband processor 106,
An RF unit 108 that receives the TAG-attached data modulated by the modulation unit 107 and transmits the data to the partner station.

The receiving section 151 includes an RF section 109, a demodulating section 110, a baseband processing section 111, and a plurality of receiving buffers 112a for storing received data for each channel.
-112n and the reception data into the reception buffer 112a-1
12n, and a reception buffer unit 112 having a selector 114 for distributing to each of the 12n.

The control unit 161 generates a fixed-length frame with the control information management unit 101 which manages operation parameters such as the transmission / reception timing of each terminal and each channel, the FEC coding rate, and the modulation / demodulation method. And a TAG
And a TAG generation unit 103 that generates

Hereinafter, the operation of the data transmitting / receiving apparatus according to this embodiment will be described.

First, in the base station, the contents of the slot allocated to each terminal station under its control are stored in the control information management unit 1.
Write to 01. In the terminal station, the slot assignment information transmitted from the base station is written in the control information management unit 101. Information written in the control information management unit 101 includes a transmission or reception type, transmission / reception timing, a communication path type,
The information includes a channel type, the number of channels, a modulation or demodulation method, and the like.

Each of the base station and the terminal station has a frame counter section 102. This is for performing fixed-length frame synchronization between the base station and the terminal station. The base station runs on its own or synchronizes with another base station or network side. The terminal station synchronizes with the synchronization signal transmitted by the base station.

The frame counter unit 102 has a resolution of the slot length, and outputs a counter value by changing the phase at the time of transmission and at the time of reception, respectively.

The TAG generation unit 103 includes the control information management unit 10
1 is read out, and the read out information is separated for each subdivided component such as a channel type or a preamble to generate a TAG. The generated TAG
Are sorted in the order of transmission / reception timing. The contents of the TAG include the type of transmission or reception, transmission / reception timing, communication path type, channel type, number of channels, modulation or demodulation method, and the like.

When the count value output by the frame counter unit 102 for generating a fixed-length frame matches the transmission / reception timing indicated by the TAG, the TAG generation unit 103 transmits the TAG according to the type of transmission or reception. It is sent to the unit 141 or the receiving unit 151.

The transmission section 141 that has received the TAG sends the TAG as a transmission data request signal to the transmission buffer section 105 stored for each channel type and managed for each communication path. Transmission buffer unit 105 that has received the TAG
Supplies the TAG to the selector 113 first. The selector 113 outputs a transmission data request signal to the corresponding transmission buffers 105a to 105n based on the channel type, the number of channels, the communication path type, and other information described in the TAG.

Upon receiving the transmission data request signal, the transmission buffers 105a-105n select the transmission data from the selector 11
Output to 3. At this time, the selector 113 attaches TAG to the head of the transmission data, and then sets the transmission data and TA
And G to the baseband processing unit 106.

The baseband processing section 106 has functional blocks having a baseband processing function such as a CRC encoder section and an FEC encoder section. These functional blocks perform baseband processing such as addition of a CRC redundant bit, addition of a FEC redundant bit, and scrambling to transmission data in accordance with information described in a TAG.

After the TAG and the transmission data are subjected to the baseband processing, they are transmitted to the modulation section 107.

Note that the processing in each functional block is also performed for data having no transmission data, such as a preamble.

Modulation section 107 modulates transmission data according to the transmission timing and modulation scheme described in the TAG. The modulated transmission data is sent to the RF unit 108 together with a control signal CTRL such as a transmission / reception switching signal generated from the transmission timing described in the TAG.

The RF unit 108 performs transmission and reception switching and other necessary control according to the control signal CTRL, and sends out transmission data to the partner station.

On the other hand, the receiving section 151
3 is received by the demodulation unit 110. The demodulation unit 110 outputs a reception control signal CTRL to the RF unit 109 according to the reception timing described in the TAG, and performs a reception operation.

The RF section 109 converts the received RF signal into an intermediate frequency (IF) signal and sends it to the demodulation section 110.

The demodulation section 110 demodulates the IF signal according to the demodulation method specified in the TAG, adds TAG to the head of the data, and sends the data with TAG to the baseband processing section 111.

The baseband processing unit 111 includes functional blocks having a baseband processing function, such as an FEC decoder and a CRC decoder. These functional blocks perform baseband processing such as descrambling of received data, FEC error correction, and CRC error detection in accordance with information described in the TAG.

At the time of the baseband processing, the baseband processing unit 111 newly writes an error detection result in the TAG, and then sends the TAG and the received data to the reception buffer unit 112.

The reception buffer unit 112 is provided with a selector 114
TAG and received data. The selector 114 selects the reception buffers 112a to 112n according to the information such as the channel type and the communication path type described in the TAG, and sends the received data to the selected reception buffer.

At this time, the selector 114 checks whether or not data relating to the presence / absence of reception error detection is described in the TAG. When data indicating that a reception error has been detected is described in the TAG, the selector 114
Does not store the received data in the reception buffers 112a-112n.

As described above, according to the data transmission / reception device according to the present embodiment, each function block for transmission / reception operates according to the instruction of the TAG added to the transferred data. The operation timing and control information generated by the timing control unit 4 (see FIG. 2) in consideration of the delay and the like are no longer necessary, and the configuration of the data transmitting and receiving apparatus can be simplified.

[0052]

As described above, according to the present invention, the function blocks in the transmission unit and the reception unit in the data transmission / reception device are controlled in accordance with the information (TAG) given to the transmission / reception data. Therefore, unlike the conventional data transmission / reception device, it is not necessary to individually perform timing control on each functional block when transmitting / receiving data.
The control and the configuration of the device can be simplified.

[Brief description of the drawings]

FIG. 1 is a block diagram of a data transmitting / receiving device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional data transmission / reception device.

[Explanation of symbols]

 Reference Signs List 101 Control information management unit 102 Frame counter unit 103 TAG generation unit 105 Transmission buffer unit 106 Baseband processing unit 107 Modulation unit 108, 109 RF unit 110 Demodulation unit 111 Baseband processing unit 112 Receiving buffer unit 113, 114 Selector 105a-105n Transmission Buffers 112a-112n Reception buffer 141 Transmission unit 151 Receiving unit 161 Control unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04J 3/00-3/26 H04L 5/22-5/26 H04B 7/24-7/26 H04Q 7 / 00-7/38 JICST file (JOIS)

Claims (9)

(57) [Claims] An information generating unit for generating information describing operation contents for each functional block in a data transmitting / receiving apparatus for communicating with a plurality of terminal apparatuses via a plurality of channels by a time division multiple access method. An information adding unit that adds the information generated by the information generating unit to transmission / reception data, wherein the transmission / reception data added with the information is sequentially transferred between functional blocks, and each functional block is A time-division multiple access type data transmission / reception device, which operates in accordance with an instruction of the information included in transmission / reception data. 2. A data transmission / reception device for communicating with a plurality of terminal devices via a plurality of channels by a time division multiple access method, wherein an information generation unit for generating information describing the operation content of each functional block is provided. Wherein the information generated by the information generating unit is sequentially transferred by itself between each functional block, and each functional block operates according to the instruction of the information. A data transmission / reception device of the division multiple access system. 3. A time-division multiple access data transmission / reception device comprising a transmission unit, a control unit, and a reception unit, wherein the control unit is configured to control operations of the transmission unit and the reception unit. In the control unit, an information generation unit that generates information describing operation details of each of the functional blocks of the transmission unit and the reception unit; and the transmission unit and the reception unit that generate the information generated by the information generation unit. And an information adding unit for adding the information to the transmission / reception data to be transmitted to the transmission / reception data. The transmission / reception data to which the information is added is sequentially transferred between the function blocks. A data transmission / reception apparatus of a time division multiple access system, which operates according to an instruction. 4. The information adding unit in the transmission unit, the transmission buffer stores transmission data for each channel, and requests transmission data and multiplexes transmission data for each of the transmission buffers. 4. The data transmission / reception apparatus according to claim 3, wherein the transmission / reception apparatus comprises: 5. The information adding section of the receiving section comprises: a plurality of receiving buffers for storing received data for each channel; and a selector for distributing received data to each of the receiving buffers. 5. The data transmission / reception device according to claim 3, wherein the data transmission / reception device is a time division multiple access system. 6. The time division multiple access system according to claim 5, wherein the selector does not store the reception data in the reception buffer when the information includes data for detecting a reception error. Data transmission and reception device. 7. A data transmission / reception device of a time division multiple access system, comprising a transmission unit, a control unit, and a reception unit, wherein the control unit is configured to control operations of the transmission unit and the reception unit. In the control unit, the control unit includes an information generation unit that generates information describing the operation content of each of the function blocks of the transmission unit and the reception unit, and the information generated by the information generation unit is alone. A data transmission / reception device of a time-division multiple access system, wherein data is sequentially transferred between functional blocks, and each functional block operates according to an instruction of the information. 8. A data transmission / reception method for transmitting / receiving data to / from a plurality of terminal devices via a plurality of channels by a time-division multiple access method, comprising the steps of: generating information describing operation details for each functional block; A data transmission / reception method comprising: a step of adding the information to transmission / reception data; and a step of sequentially transferring the transmission / reception data to which the information is added between functional blocks. 9. A data transmission / reception method for transmitting / receiving data to / from a plurality of terminal devices via a plurality of channels by a time-division multiple access method, wherein: a step of generating information describing operation contents for each functional block; A step of sequentially transferring the information independently between the respective functional blocks.