JPH10215477A - Communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the communication equipment of a base station that sends data accurately to a conventional digital wired line from the base station sending/receiving data with a mobile station by the TDMA-TDD system. SOLUTION: The equipment for the base station 2 is provided with a storage means 21 that stores data sent from each mobile terminal, a register 22 that reads and stores data in a prescribed bit number from the storage means 21 in a read out timing generated for a prescribed period, a data transmission register 23 that is used for transmission and reads data stored in the register 22 in response to a transmission request signal which is sent from a digital wired line 3 for a prescribed period by a prescribed bit number each, a transmission enable signal generating means 24 that generates a transmission enable signal representing it that the transmission to the digital wired line 3 is available, and a internal counter 25 that provides a transmission number to the transmission request signal based on the transmission enable signal. Then a data reception timing from the register 22 to the data transmission register 23 is controlled based on the transmission number.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a TDMA-TDD.
The present invention relates to a communication device that transmits and receives data according to a method.

[0002]

2. Description of the Related Art Conventionally, when data is transmitted to a general digital wired line at a base station of a communication network which transmits and receives data according to the TDMA-TDD system, the base station side becomes a master and the transmission timing to the digital wired line is determined by the base station. The station decides itself and transmits based on the decided timing. That is, data is transmitted from the base station regardless of the operation status of the digital wired line.

[0003]

However, in the communication device having the above configuration, since the base station side and the digital wired line side are asynchronous, the data is transmitted from the base station before the digital wired line side can transmit. Is sent,
There has been a problem that a problem such as a loss of transmission data occurs.

[0004] The present invention has been made in view of the above points, and an object of the present invention is to transmit data from a base station of a communication network that transmits and receives data by a TDMA-TDD system to a general digital wired line. It is an object of the present invention to provide a communication device capable of transmitting data accurately without transmitting data.

[0005]

According to the first aspect of the present invention,
A plurality of mobile stations, a base station for transmitting and receiving data to and from the mobile stations according to the TDMA-TDD scheme, and a digital wired line for transmitting and receiving data between the base station and another communication network; The station has storage means for storing data transmitted from each of the mobile terminals, a register for reading and temporarily storing data of a predetermined number of bits from the storage means at a read timing generated in a predetermined cycle, and A data transmission register for reading out and transmitting data stored in the register by a predetermined number of bits at a time in accordance with a transmission request signal transmitted at a predetermined period, and transmitting data from the base station to the digital wired line; Transmission permission signal generating means for generating a transmission permission signal representing An internal counter that assigns a transmission number to a transmission request signal transmitted at a fixed period, and controls the timing of data transfer from the register to the data transmission register based on the transmission number. It is a feature.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a communication device according to an embodiment of the present invention. 1 is a mobile station group, 2 is a base station, and 3 is a digital wired line.

[0007] The mobile station group 1 includes mobile stations 10 to 13. The base station 2 includes a storage unit 21 and a register 22
, A data transmission register 23, transmission permission signal generating means 24, and an internal counter 25.

[0008] The mobile station group 1 and the base station 2 are connected by TDMA-T
Data is transmitted and received by the DD method. Each of the mobile stations 10 to 13 transmits and receives data to and from the base station 2 according to the assigned slot. Note that the number of mobile stations 10 to 13 that transmit and receive data to and from one base station 2 is not limited to four.

The digital wired line 3 is a line used when communicating with another communication network 4 such as another base station.

[0010] Hereinafter, certain mobile stations 10 to 13 to base station 2
The transmission period of data transmitted to the digital wired line 3 is 5 msec, and the generation period of the transmission request signal transmitted from the digital wired line 3, that is, the data transmission period to
Description will be given as μsec. Assuming that the base station 2 transmits and receives data to and from the four mobile stations 10 to 13, two slots for transmission and reception are required for each of the mobile stations 10 to 13. Therefore, each slot is 625 μsec. Will occur every time. That is, the transmission timing to the digital wired line 3 generated in one slot is five times. However, each transmission cycle is not limited to this value.

[0011] The storage means 21 stores data transmitted from the mobile station group 1. The stored data is read by a predetermined number of bits at a read timing generated in a predetermined cycle. In this embodiment, one read timing occurs in one slot, so that data of a predetermined number of bits is read from the storage means 21 every 625 μsec.

The register 22 temporarily stores data of a predetermined number of bits read from the storage means 21 at a read timing generated at a period of 625 μsec.

The data transmission register 23 reads out and transmits a predetermined number of bits of data stored in the register 22 in accordance with a transmission request signal transmitted from the digital wired line 3 at predetermined intervals. Now, a transmission request signal is generated five times in one slot from the digital wired line 3. If it is assumed that 5N bits of data have been read from the storage means 21 in the register 22, N bits of the data transmission Data is read out to the register 23 and transmitted N bits at a time in accordance with the transmission request signal.
At this time, the data transmission register 23 only needs to have a storage capacity that is one fifth of that of the register 22.

The transmission permission signal generating means 24 generates a transmission permission signal indicating that data transmission to the digital wired line 3 is possible in the base station 2.

The internal counter 25 sequentially assigns transmission numbers to transmission request signals transmitted from the digital wired line 3 based on the transmission permission signal. In the present embodiment, a transmission number is assigned so that the transmission request signal received by the data transmission register 23 becomes the first immediately after the transmission permission signal is generated in the base station 2. Since the number of transmission request signals generated in one slot is five, when a transmission number is sequentially assigned to the generated transmission request signals, the transmission request signal generated next to the transmission request signal numbered five will be used. The operation of giving No. 1 is repeated.

An overwrite prevention register 26 is provided between the storage means 21 and the register 22 to temporarily store data read from the storage means 21 until all data from the register 22 is passed to the data transmission register 23. Accumulate,
Data that has been read from the storage means 21 and accumulated in the register 22 may be prevented from being overwritten by data read from the storage means 21 later.

Next, the operation of this embodiment will be described. FIG.
FIG. 5 is a diagram showing a generation timing of a transmission request signal, a data read timing from the storage unit 21 when the power of the base station 2 is turned on, and a generation timing of a transmission permission signal. The number added to the data transmission request signal is the transmission number assigned by the internal counter 25. The transmission request signal is generated at a cycle of 125 μsec, and the readout timing from the storage unit 21 is generated at a cycle of 625 μsec.

The read timing from the storage means 21 and the generation timing of the transmission permission signal have a certain margin (hereinafter referred to as generation margin), and a data transmission request signal is not generated during the generation margin (FIG. 2).
(Case (a)) and a case where a data transmission request signal is generated between occurrence margins (case (b) of FIG. 2).

The operation in the case of FIG. 2A will be described. At the read timing, the transmission data to be transmitted to the digital wired line 3 is read from the storage unit 21 in which the data transmitted from the mobile station group 1 is stored. The read data is stored in the register 22. Hereinafter, the data read from the storage unit 21 at one read timing is assumed to be 5N bits.

When the transmission permission signal is generated, the data transmission register 23 stores the data in the register 2 in order to transmit the transmission data in accordance with the data to which the first transmission number is assigned.
2 is read out to the data transmission register 23. The read data is immediately transmitted to the digital wired line 3.

Hereinafter, the first N bits are set to the digital wired line 3.
, Data is read out from the register 22 to the data transmission register 23 by N bits, and transmitted in accordance with the data transmission request signal.

That is, when a transmission permission signal is generated and a transmission request signal with the first transmission number is input to the register 22, N-bit data is immediately read from the register 22 and transmitted to the digital wired line 3. I do. Hereinafter, when the previously read data is transmitted, the operation of preparing the next N bits in the data transmission register 23 and transmitting it in accordance with the data transmission request signal is repeated.

Next, the operation in the case of FIG. 2B will be described. In this case, similarly to FIG. 2A, the transmission data is read at the read timing from the storage unit 21 in which the data transmitted from the mobile station group 1 is stored. FIG.
In the case of (b), a data transmission request signal to which the number 5 is assigned is generated from the digital wired line 3 before the transmission permission signal is generated.
No data is read.

When a transmission permission signal is generated and a transmission request signal with the first transmission number is input to the register 22, N-bit data is immediately read from the register 22 and transmitted from the digital wired line 3. Send data.

After that, when the previously read data is transmitted, the operation of preparing the next N bits in the data transmission register 23 and transmitting it in accordance with the data transmission request signal is repeated.

In the case of FIG. 2B, data is read from the storage means 21 to the register 22 before the generation of the transmission request signal assigned the fifth transmission number. But 4
Immediately after the data is transmitted in accordance with the data transmission request signal to which the No. transmission number is assigned, the fifth transmission number is assigned to the N-bit data remaining in the register 22 in the data transmission register 23. It is prepared to transmit in accordance with the data transmission request signal. Therefore, even if a read timing from the storage means 21 occurs between the transmission request signals numbered 4 and 5, the register 22 has no data when the read timing occurs. Register 22
Will not be overwritten by data stored in the register 22 later.

According to this embodiment, when data is transmitted from the base station 2 of the communication network 4 for transmitting and receiving data by the TDMA-TDD method to the general digital wired line 3, the base station side and the digital wired line side Transmit data in synchronization with each other, so that loss of transmission data can be prevented.

[0028]

As described above, according to the first aspect of the present invention, a plurality of mobile stations, and the mobile station and the TDMA-TDD are connected.
A base station for transmitting and receiving data according to a system, and a digital wired line for transmitting and receiving data between the base station and another communication network, wherein the base station has data transmitted from each of the mobile terminals. A register for reading out a predetermined number of bits of data from the storage means at a read timing generated in a predetermined cycle and temporarily storing the data, and a register for transmitting a transmission request signal transmitted in a predetermined cycle from the digital wired line. A data transmission register for reading and transmitting data stored in the register by a predetermined number of bits, and transmission permission signal generating means for generating a transmission permission signal indicating that data can be transmitted from the base station to the digital wired line And transmitting a transmission request signal transmitted at a predetermined period from the digital wired line based on the transmission permission signal. A base station for transmitting and receiving data according to the TDMA-TDD method, since an internal counter for assigning a signal is provided, and the timing of data transfer from the register to the data transmission register is controlled based on the transmission number. In transmitting data to a general digital wired line, no matter what timing a data transmission request signal occurs, since data is transmitted from the base station to the digital wired line in synchronization,
A communication device capable of transmitting data accurately without causing loss of transmission data can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a communication device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a generation timing of a transmission request signal, a timing of reading from a storage unit when a base station is powered on, and a generation timing of a transmission permission signal according to an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mobile station group 2 base station 3 digital wired line 4 communication network 10 to 13 mobile station 21 storage means 22 register 23 data transmission register 24 transmission permission signal generating means 25 internal counter 26 overwrite prevention register

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04J 3/00 (72) Inventor Kazuyasu Yamane 1048 Odakadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor Yabuta Akira 1048 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works, Ltd.

Claims (1)

[Claims] 1. A mobile station comprising: a plurality of mobile stations;
A base station that transmits and receives data according to the TDD method, and a digital wired line that transmits and receives data between the base station and another communication network. The base station transmits the data from each of the mobile terminals. A storage unit for storing data, a register for reading data of a predetermined number of bits from the storage unit at a read timing generated in a predetermined cycle and temporarily storing the data, and a transmission request signal transmitted in a predetermined cycle from the digital wired line. A data transmission register for reading and transmitting the data stored in the register by a predetermined number of bits, and a transmission permission signal for generating a transmission permission signal indicating that data can be transmitted from the base station to the digital wired line Means for transmitting a transmission request signal transmitted at a predetermined cycle from the digital wired line based on the transmission permission signal. And an internal counter to impart transmission number, the communication apparatus being characterized in that so as to control the timing of data transfer to the data transmit register from the register on the basis of the transmission number.