JP2001103000A - Mobile radio terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile radio terminal device which is able to stably communicate with two opposite communication stations without relatively increasing the circuit scale nor power consumption. SOLUTION: A reference clock generating circuit 101 generates a 1st reference clock regarding transmission to and reception from a base station CS1 and detects error information on timing between a 2nd reference clock regarding transmission to and reception from a base station CS2 and a 2nd reference clock. Then a timing correcting circuit 104 generates the 2nd reference clock by using the error signal and 1st reference clock.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to, for example, PHS
(Personal Handyphone System) and PDC (PublicDigi
TAL Cellar) TDMA (Time D
More particularly, the present invention relates to a mobile radio terminal device capable of communicating with a plurality of communication partner stations in one frame.

[0002]

2. Description of the Related Art As is well known, recently, in a mobile radio terminal of the TDMA system, as shown in FIG. It is possible to allocate a time slot to each and perform communication.

In such a mobile radio terminal device, in order to communicate with two base stations, it is necessary to generate a reference clock synchronized with the transmission / reception timing of each base station. Some have only one reference clock generation circuit.

FIG. 4 shows a timing chart in the case where there is a difference of 13 μ [sec] between the transmission and reception timings of two communication partner stations. If there is a difference between the transmission and reception timings as shown in this figure, based on the synchronization information extracted from the reception slot from either one of the communication partner stations,
Since the reference clock is generated, transmission and reception of the remaining one may become impossible.

Therefore, conventionally, two reference clock generation circuits 101a and 101b are provided as shown in FIG.
Each of these circuits generates a reference clock synchronized with the transmission / reception timing of the corresponding communication partner station.

[0006] With respect to one communication partner station, the received data is analyzed by the received data analysis circuit 102a, and the transmission data is generated by the transmission data generation circuit 10a.
Perform in 3a.

On the other hand, with respect to the other communication partner station, the reception data is analyzed by the reception data analysis circuit 102b.
The transmission data is generated by the transmission data generation circuit 103b.
Do with.

However, in such a configuration, since two reference clock generation circuits 101a and 101b are provided, in a mobile radio terminal device in which miniaturization is desired, an increase in circuit scale and an increase in power consumption pose a problem. Was.

[0009]

In the conventional mobile radio terminal device, when communicating with two communication partner stations within the same frame, normal communication cannot be performed, the circuit scale increases, and the power consumption increases. However, there is a problem that a configuration accompanied by the above is required.

[0010] The present invention has been made to solve the above problems, and without increasing the circuit scale and power consumption.
It is an object of the present invention to provide a mobile wireless terminal device capable of performing stable communication with two communication partner stations within the same frame.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a wireless connection with a partner station by a time division multiplexing method, and establishes communication with a plurality of partner stations through a plurality of time slots in the same frame. In a communicable mobile radio terminal device, synchronization information detecting means for detecting synchronization information from time slots respectively received from a plurality of partner stations, and an error between the plurality of synchronization information detected by the synchronization information detecting means. Error detecting means for detecting, a clock generating means for generating a reference clock for transmitting a time slot addressed to the other station based on one of the plurality of pieces of synchronization information detected by the synchronization information detecting means, By correcting the timing of the reference clock generated by the clock generation means based on the error detected by the means,
Clock correction means for generating a reference clock for transmitting a time slot addressed to the other station different from the reference clock generated by the clock generation means is provided.

[0012] In the mobile radio terminal having the above-described configuration, for example, when communicating with two communication stations, the clock generating means uses the first reference clock for transmitting the time slot addressed to the first communication partner. The second reference clock for generating and transmitting the time slot addressed to the second communication partner is generated by correcting the timing of the first reference clock based on the error detected by the error detection means. I am trying to do it.

Therefore, according to the mobile radio terminal having the above-described configuration, reference clocks synchronized with time slots to be transmitted to a plurality of partner stations are generated, despite the configuration including only one clock generation unit. Therefore, stable transmission to a plurality of partner stations can be performed in the same frame without increasing the circuit scale and power consumption.

In order to achieve the above object, the present invention provides a wireless connection with a partner station by a time-division multiplexing method, wherein the mobile station can communicate with a plurality of partner stations through a plurality of time slots in the same frame. In the wireless terminal device,
Synchronization information detecting means for detecting synchronization information from time slots respectively received from a plurality of partner stations,
An error detecting means for detecting an error between a plurality of pieces of synchronization information detected by the synchronization information detecting means, and a time transmitted from a partner station based on one of the plurality of pieces of synchronization information detected by the synchronization information detecting means. A clock generation unit for generating a reference clock for receiving a slot, and a timing correction of the reference clock generated by the clock generation unit based on the error detected by the error detection unit. Clock correction means for generating a reference clock for receiving a time slot transmitted from a partner station different from the generated reference clock.

In the mobile radio terminal having the above configuration, for example, when communicating with two communication stations, the clock generating means generates the first reference clock for receiving the time slot from the first communication partner. Then, the second reference clock for receiving the time slot from the second communication partner is generated by performing timing correction of the first reference clock based on the error detected by the error detection means. I have to.

Therefore, according to the mobile radio terminal having the above-described configuration, it is possible to generate reference clocks respectively synchronized with time slots transmitted from a plurality of partner stations, despite the configuration including only one clock generation unit. Therefore, stable reception from a plurality of partner stations can be performed within the same frame without increasing the circuit scale or power consumption.

Further, in order to achieve the above object, the present invention provides a wireless connection with a partner station by a time-division multiplexing method, and a mobile station capable of communicating with a plurality of partner stations through a plurality of time slots in the same frame. In the wireless terminal device, synchronization information detecting means for detecting synchronization information from time slots respectively received from a plurality of partner stations, and error detection for detecting an error between the plurality of synchronization information detected by the synchronization information detecting means Means, a clock generating means for generating a reference clock synchronized with a time slot transmitted / received to / from a partner station based on one of the plurality of pieces of synchronization information detected by the synchronization information detecting means, and an error detecting means. By correcting the timing of the reference clock generated by the clock generator based on the detected error,
Clock correction means for generating a reference clock synchronized with a time slot transmitted / received to / from another station different from the reference clock generated by the clock generation means is provided.

In the mobile radio terminal having the above configuration, for example, when communicating with two communication stations, the clock generation means generates a first reference clock for transmitting and receiving a time slot with a first communication partner. The second reference clock for transmitting / receiving the time slot to / from the second communication partner is based on the error detected by the error detection means.
By performing timing correction of the reference clock.

Therefore, according to the mobile radio terminal having the above configuration, it is possible to generate the reference clocks synchronized with the time slots for transmitting and receiving with a plurality of partner stations, despite the configuration having only one clock generating unit. So that without increasing the circuit scale or power consumption,
Stable communication can be performed with a plurality of partner stations within the same frame.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a transmission / reception unit of a mobile wireless terminal device according to an embodiment of the present invention. This transmission / reception unit includes a reference clock generation circuit 101 and reception data analysis circuits 102a and 102b.
And transmission data generation circuits 103a and 103b and a timing correction circuit 104.

After a radio frequency signal received from space is demodulated into a baseband digital signal by a radio unit (not shown), two signals transmitted from the two base stations CS1 and CS2 to the apparatus are transmitted from this signal. The received data R1 and R2 in the slot are respectively extracted.

Then, the received data R1 and R2 of the two time slots extracted by the radio section are converted into a reference clock generating circuit 101 and received data analyzing circuits 102a and 102b.
And respectively.

The reference clock generation circuit 101 generates a first reference clock based on the synchronization information included in the reception data R1 of the two reception data R1 and R2. Further, the reference clock generation circuit 101 compares the synchronization information with the synchronization information included in the remaining one of the received data R2, detects an error between the two, and outputs the error as error information together with the first reference clock. , To the timing correction circuit 104.

The timing correction circuit 104 synchronously corrects the first reference clock input from the reference clock generation circuit 101 based on the error information to generate a second reference clock.

The timing correction circuit 104 outputs the first reference clock to the reception data analysis circuit 102a and the transmission data generation circuit 103a, and outputs the second reference clock to the reception data analysis circuit 102b and the transmission data generation circuit 103b. Output to the generation circuit 103b.

The reception data analysis circuit 102a analyzes the reception data R1 of the two reception data R1 and R2 input from the radio section using the first reference clock,
Decrypt.

Similarly, the reception data analysis circuit 102b
The reception data R2 of the two reception data R1 and R2 input from the radio unit is analyzed and decoded using the second reference clock.

The transmission data generation circuit 103a transmits the transmission data T destined for the base station CS1 that transmitted the reception data R1.
1 is generated using the first reference clock. Similarly, the transmission data generation circuit 103b generates transmission data T2 addressed to the base station CS2 that transmitted the data R2 using the second reference clock.

With the above configuration, in the transmitting / receiving section of the mobile radio terminal, the reference clock generation circuit 101
A first reference clock related to transmission and reception with the base station CS1 is generated, and timing error information between the second reference clock related to transmission and reception with the base station CS2 and the first reference clock is detected. Then, the timing correction circuit 104 generates a second reference clock using the error information and the first reference clock.

Therefore, according to the mobile radio terminal device having the above configuration, two reference clocks can be generated only by the reference clock generation circuit 101 that oscillates the reference clock, and as shown in FIG. Base station CS1,
It is possible to communicate with CS2 at a timing suitable for each.

The present invention is not limited to the above embodiment. It goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0032]

As described above, according to the present invention, when communicating with, for example, two communication stations, the first reference clock for transmitting / receiving the time slot to / from the first communication partner by the clock generation means. Is generated, and a second reference clock for transmitting / receiving a time slot to / from a second communication partner is determined based on the error detected by the error detecting means.
By performing timing correction of the reference clock.

Therefore, according to the present invention, it is possible to generate reference clocks synchronized with time slots for transmission and reception with a plurality of partner stations, despite the configuration including only one clock generation means. A mobile radio terminal device capable of performing stable communication with a plurality of partner stations within the same frame without increasing power consumption.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a configuration of an embodiment of a transmission / reception unit of a mobile wireless terminal device according to the present invention.

FIG. 2 is a diagram for explaining transmission / reception timing in a transmission / reception unit of the mobile wireless terminal device shown in FIG.

FIG. 3 is a conceptual diagram for explaining simultaneous communication with two base stations.

FIG. 4 is a diagram for explaining a problem of a conventional mobile wireless terminal device.

FIG. 5 is a circuit block diagram illustrating a configuration of a transmission / reception unit of a conventional mobile wireless terminal device.

[Explanation of symbols]

 101: reference clock generation circuit 102a, 102b: reception data analysis circuit 103a, 103b: transmission data generation circuit 104: timing correction circuit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K028 AA07 AA14 BB04 CC02 CC05 HH03 MM16 NN01 NN21 NN32 NN45 5K047 AA11 AA16 BB01 CC06 GG45 HH01 HH12 HH42 KK02 KK12 MM12 5K067 AA42 EE03 BB25 EE03 BB03

Claims (3)

[Claims] 1. A mobile wireless terminal device capable of communicating with a plurality of partner stations through a plurality of time slots in the same frame by wirelessly connecting to the partner station by a time division multiplexing method. Synchronization information detection means for detecting synchronization information from each time slot; error detection means for detecting an error between a plurality of pieces of synchronization information detected by the synchronization information detection means; Synchronization information 1
Clock generating means for generating a reference clock for transmitting a time slot addressed to the counterpart station based on the error detection means, and a clock generated by the clock generating means based on an error detected by the error detecting means. Clock correction means for generating a reference clock for transmitting a time slot addressed to a different station different from the reference clock generated by the clock generation means by performing timing correction of the reference clock. Mobile radio terminal device. 2. A mobile radio terminal device capable of communicating with a plurality of partner stations through a plurality of time slots in the same frame by wirelessly connecting to the partner station by a time division multiplexing method. Synchronization information detection means for detecting synchronization information from each time slot; error detection means for detecting an error between a plurality of pieces of synchronization information detected by the synchronization information detection means; Synchronization information 1
Clock generating means for generating a reference clock for receiving a time slot transmitted from the other station based on the error detection means, and a clock generated by the clock generating means based on an error detected by the error detecting means. And clock correction means for generating a reference clock for receiving a time slot transmitted from a partner station different from the reference clock generated by the clock generation means by performing timing correction of the reference clock generated by the clock generation means. A mobile wireless terminal device characterized by the above-mentioned. 3. A mobile radio terminal which is capable of communicating with a plurality of partner stations through a plurality of time slots in the same frame by wirelessly connecting to a partner station by a time division multiplexing method. Synchronization information detection means for detecting synchronization information from each time slot; error detection means for detecting an error between a plurality of pieces of synchronization information detected by the synchronization information detection means; Synchronization information 1
Clock generating means for generating a reference clock synchronized with a time slot transmitted / received to / from the opposite station, based on the error detected by the error detecting means. And clock correction means for generating a reference clock synchronized with a time slot to be transmitted and received to and from a partner station different from the reference clock generated by the clock generation means by performing timing correction of the reference clock generated by the clock generation means. A mobile wireless terminal device characterized by the above-mentioned.