JPH07327003A - Reception level measurement timing adjustment system in mobile communication - Google Patents

Abstract

PURPOSE:To measure a reception level in an optional timing depending on the state with respect to the reception level measurement timing adjustment system in mobile communication using plural slots of a radio channel so as to conduct communication. CONSTITUTION:The radio equipment for mobile communication is provided with a reception level data extract section 3 receiving a signal received by an antenna 2 and extracting a reception level by a reception level measurement enable signal and a reception level measurement timing control section 1 generating the reception level measurement enable signal. The reception level measurement timing control section 1 sets an optional measurement timing in a slot of a designated channel in the carrier sense before communication start to a carrier sense timing setting means 10 and uses a coincidence detection means 12 to detect the coincidence between the set value and the count of a timing counter 11 providing the output of each timing position and generates a reception level measurement enable signal to the reception level data extract section 3 based on the detection output.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reception level measurement timing adjustment method for performing highly accurate carrier sense and call quality in wireless mobile communication.

In recent years, as the number of wireless carriers in mobile communications such as car phones, mobile phones, and simple mobile phones (personal handy phones) has increased, it is more likely that a plurality of communication devices will use the same carrier. A mobile communication device capable of performing highly accurate carrier sense operation and call quality monitoring operation is required, and it is desired to be able to arbitrarily adjust the timing of reception level measurement for that purpose.

[0003]

2. Description of the Related Art FIG. 6 is a block diagram of a conventional example, and FIG. 7 is an explanatory diagram of conventional reception level measurement. In a mobile communication system such as a mobile phone, a mobile device and a fixed base station wirelessly communicate with each other using a limited number of carriers (carrier frequencies: channels). In addition, when mobile communication between the base station and the mobile device is performed using digital signals, each channel is time-division multiplexed, and one signal (voice signal) is used by using one of a plurality of time slots. And digital signals representing data) are transmitted, and different time slots are used for transmission and reception.

Referring to FIG. Is a diagram showing the structure of a channel, and in this example, the channel (CH0) is composed of eight communication slots (called time slots or simply slots). Each of the communication slots is composed of n bits.

In the conventional reception level measurement configuration shown in FIG. 6, 50 is an antenna, 51 is a reception level data extraction section, 52 is a data storage section for storing the extracted reception level data, and 53 is a reception level measurement. It is a timing control unit.

The configuration shown in FIG. 6 is provided in a mobile communication base station and a wireless device of a mobile device, and the wireless device performs a carrier sense operation before starting communication. Carrier sense is
In order to avoid interference with other radios in the communication slot (time slot) of the carrier (channel) that the radio intends to use, measure the electric field strength (reception level) in the corresponding slot and judge whether it can be used. That is.

In the carrier sense operation, the signal of the designated slot of the channel selected by the channel selection means (not shown) from the signals received from the antenna 50 is input to the reception level data extraction section 51. The reception level data extraction unit 51 is driven by the reception level measurement enable signal generated from the reception level measurement timing control unit 53 from this channel signal, the signal level received at that time is extracted, and the extracted reception level data is extracted. Is stored in the data storage unit 52.

When performing carrier sense, the timing counter 54 of the reception level measurement timing control unit 53 counts a timing signal (a signal generated in a repeating cycle corresponding to each bit position in a time slot) and decodes the count output. It is output to the unit 55. When the count value set in advance is reached, the decoding unit 55 generates a decoding output to drive the reception level measurement enable signal generation unit 56, and the reception level measurement enable signal generation unit 56 outputs the reception level measurement enable signal to the reception level data extraction unit. Drive 51. The time slot is designated by another circuit (not shown) (or the timing counter 54 performs counting including the time slot, and the decoding unit 55 decodes the time slot and timing).

FIG. 7B. Shows the measurement points during carrier sense. This figure shows that a total of 3 points are selected, one for each of the three parts of the specified slot, the front edge, the center, and the rear edge. Then, the decoding unit 55 is set so as to generate the output at the timing (one bit) position, and is fixed to the set value.

When a slot for a free channel is detected by the above carrier sense operation, a communication channel (time slot) is selected, and wireless communication is started, a speech quality monitoring operation is performed by the wireless device. Done by. Call quality monitoring monitors the slot error during communication and the reception level of the communication carrier as the mobile unit moves during communication, and switches the communication carrier when a communication failure is likely to occur. It is performed in order to maintain quality by performing processing such as.

This call quality monitoring is also performed by the configuration of FIG. In this case, the timing position is set in the decoding unit 55 so that the decoding output is generated at a specific timing in the time slot in which communication is currently being performed, and the timing position is fixed and used. FIG. 7 c. An example of the timing when monitoring the call quality is shown in. As shown in this example, it is usually necessary to reset different values to the decoding unit 55 in order to set the position different from the timing at the time of carrier sensing.
In order to save the trouble, the B. It has the same value as the timing of the central portion at the time of carrier sensing shown in.

At the time of monitoring the call quality, c. When the reception level measurement enable signal is generated at the timing shown in
The reception level data extraction unit 51 extracts the level of the reception signal at that time and stores it in the data storage unit 52. If it is found from this level that the speech quality has deteriorated, an operation such as switching to an empty time slot of another empty channel is performed by a control operation (not shown).

[0013]

As described above, in the conventional radio equipment for mobile communication, the measurement timing by the reception level measurement enable signal is fixed by the setting in the decoding section, so that the radio equipment is used (radio wave). State of
There is a problem that even if an attempt is made to change the measurement timing in a slot (including a boundary with an adjacent slot) according to the usage environment, it is difficult to immediately respond.

Further, according to the prior art, when performing the call quality monitoring operation, if it is attempted to make it common with the timing control at the time of carrier sense, the measurement can be made only at the same timing as that at the time of carrier sense, so that it is more accurate. There was a problem that it was not possible to monitor proper call quality.

The present invention provides a reception level measurement timing adjustment method capable of carrying out carrier sensing at arbitrary timing according to the situation in a radio device which communicates using a slot of a radio channel consisting of a plurality of slots. Is the first purpose. Further, the present invention provides a reception level measurement timing adjustment method in mobile communication capable of performing highly accurate quality monitoring in the operation of call quality monitoring in a wireless device that performs communication using a slot of a wireless channel including a plurality of slots. The second purpose is to provide.

[0016]

FIG. 1 is a first principle configuration diagram of the present invention, and FIG. 2 is a second principle configuration diagram of the present invention. These components are provided in the base station and mobile device wireless devices that perform mobile communication.

In FIG. 1, 1 is a reception level measurement timing controller, 10 is timing setting means for externally setting an arbitrary reception level measurement timing value for carrier sense or speech quality monitoring, and 11 is a timing signal. A timing counter for counting and outputting the current timing position, 12 for coincidence detecting means, 13 for receiving level measurement enable signal generating means, 2 for antenna, 3 for receiving level data extracting section, 4 for timing setting means 10. It is an external device that sets an arbitrary timing value.

In the second principle configuration of FIG. 2, the internal configuration of the reception level measurement timing control unit 1 and the external device 4 having a configuration different from that of FIG. 1 are shown, and the symbols 11 to 13 in FIG. Corresponding to the same reference numerals in FIG. 1, 10a is a carrier sense timing setting means, 10b is a speech quality monitoring timing setting means, 14 is a selection unit, and 15 is selected data setting means. It should be noted that a plurality of timing setting means 10b for monitoring the communication quality can be provided when monitoring the communication quality at a plurality of places in the slot.

According to the present invention, there is provided timing setting means for externally setting the reception level measurement timing, and coincidence detecting means for detecting the coincidence between the value of the timing setting means and the value of the timing counter is provided. The reception level is measured at the timing of generating the level measurement enable signal. Further, selection is made by setting respective timing values in the carrier sense timing setting means and the call quality monitoring timing setting means, and switching the output of one of the two timing setting means by a selection signal supplied from the outside. It is selected by the unit and supplied to the coincidence detecting means to detect coincidence with the value of the timing counter.

[0020]

In the case of FIG. 1, when the carrier sense is performed before the start of the call for the first time, the value of the arbitrary timing at which the reception level in the slot of the carrier desired to perform the carrier sense (consisting of n bit timings) is measured is set. The external device 4 sets the timing setting means 10. On the other hand, the timing counter 11 counts each received timing signal forming the slot of the designated channel and outputs the count value to the coincidence detection means 12. Note that the carrier sense measures the reception level at a plurality of timing positions (leading edge, center, trailing edge, etc.) within the slot of the carrier. For that purpose, a plurality of timing positions are individually set in the timing setting means 10. The coincidence detection means 12 generates a coincidence detection signal each time it coincides with a plurality of set timing values.

The coincidence detecting means 12 is a timing counter 1.
When the count value of 1 coincides with the value of the timing setting means 10, the coincidence detection signal is driven to the reception level measurement enable signal generating means 13. The reception level measurement enable signal generated by the reception level measurement enable signal generation means 13 causes the reception level data extraction unit 3 to extract (measure) the signal level received at that timing, and output measured value data.

After the mobile communication is started, the call quality is monitored by the slot used. In this case, an arbitrary timing value for which the slot being used is desired to be monitored is set from the external device 4 to the timing setting means 10. In this case, the timing value set in the timing setting means 10 is usually one, but a plurality of timing values may be set. After the setting, the coincidence detecting means 12 detects the coincidence between the value of the timing counter 11 and the value of the timing setting means 10, and the reception level data is extracted by the same operation as in the case of the above carrier sense.

In the case of FIG. 2, the timing setting means 10 sets an arbitrary timing value at which it is desired to measure the reception level of the slot of the carrier for which carrier sensing is to be performed beforehand from an external device.
The value of the timing in the slot for which the call quality is to be monitored is set in the timing setting means 10b. A signal instructing whether to operate the reception level measurement timing control unit 1 by the carrier sense operation or the speech quality monitoring operation is set from the external device 4 to the selection data setting means 15.

The output of the selection data setting means 15 causes the selection section 14 to select one of the timing setting means 10a and 10b, and the selected timing value is supplied to the coincidence detecting means 12, and the coincidence detecting means 12 of FIG. As in the case, the value of the timing counter 11 is compared, and if a match is detected, the reception level measurement enable signal generating means 13
A reception level measurement enable signal is generated from the measurement signal and the reception level is measured.

In the configuration of FIG. 2, the carrier sense timing value and the call quality monitoring timing value can be set to different values, and switching is performed by selecting the selection data from the external device to the selection data setting means 15. It is done by setting. Further, in order to carry out carrier sensing at a plurality of positions in the slot, the timing setting means 10a is provided with means for setting a plurality of setting values, and desired timing values are set for each of them, and a plurality of those values are set at the time of carrier sensing. Setting means is selected.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a block diagram of the first embodiment, and FIG. 4 is an explanatory diagram of the reception level measurement according to the present invention.

The configuration of the first embodiment shown in FIG. 3 corresponds to the first basic configuration shown in FIG. In FIG. 3, 30 is an antenna,
31 is a reception level data extraction unit, 32 is a data storage unit,
Reference numeral 33 denotes a processing device that controls the reception level measurement timing control unit 34 in accordance with an instruction from a control device (not shown) of the wireless device to detect the measurement value of the reception level and supply it to the control device. Includes RAM and ROM. 34
Is a reception level measurement timing control unit (corresponding to 1 in FIG. 1), and 340 to 343 inside are 10 to 10 in FIG.
Corresponding to the function of each unit of 13, the reference numeral 340 is a reception level measurement point setting register, 341 is a timing counter, 342 is a coincidence detection unit, and 343 is a reception level measurement enable signal generation unit.

In this embodiment, each of a plurality of slots constituting a channel is composed of 240 bits, and each of 0 to 0
It is assumed that each bit of 239 occurs at a timing position of 0 to 239.

The operation of the first embodiment shown in FIG. 3 will be described. The processor 33 receives a carrier sense instruction from a controller (not shown) of the wireless device, and at the same time inputs a timing value for carrier sense from the controller. If the carrier sense timing value is stored in the processing device 33 in advance, the instructed value or the stored value is output serially or in parallel from the line 33a, and is received by the reception level measurement point setting register 340. Is set. The reception level measurement point setting register 340 includes a register in which at least three timing values (each timing value of each of the leading edge portion, the central portion, and the trailing edge portion) are set, and each timing value is set. It

After that, the operation of measuring the reception level for carrier sense is started, and the timing value of the timing counter 341 and any one of the plurality of setting values set in the reception level measuring point setting register 340 are matched. When detected by the coincidence detection unit 342, an enable signal is generated from the reception level measurement enable signal generation unit 343 at the detected timing, the reception level data extraction unit 31 is driven, the reception level data is extracted, and the extracted reception level The data is stored in the data storage unit 32. The data of each timing value in the data storage unit 32 is read by the processing device 33 and sent to the control device of the wireless device.

FIG. 4A. The timing of the carrier sense according to the present invention is shown in FIG. 7 and the timing value can be arbitrarily selected. Therefore, the timing (bit position) at any one point in each of the three portions of the front edge portion, the central portion, and the rear edge portion in the slot. Make a career sense in. That is, one of the timing values of the leading edge portion, the center portion, and the trailing edge portion of the communication slot of the designated channel is set in the three registers of the reception level measurement point setting register 340, and the setting values of the respective registers are set. The reception level is measured each time the value of the timing counter 341 matches.

Next, when the communication quality is monitored, the timing value in the slot to be monitored from the processor 33 is set in the reception level measurement point setting register 340 via the line 33a as in the case of the above carrier sense. When done,
The timing value and the value of the timing counter 341 are compared by the coincidence detection unit 342, and if they coincide, an enable signal is generated from the reception level measurement enable signal generation unit 343, and the reception level data extraction is performed in the same manner as the above carrier sense operation. The unit 31 operates and the reception level data is stored in the data storage unit 32. Also in the call quality monitoring, it is possible to set a plurality of points in the slot as monitoring points and monitor at a plurality of points in the same manner as in the case of the above carrier sense.

B. of FIG. The timing of the call quality monitoring according to the present invention is shown in FIG. 7. As shown in the figure, the call quality can be measured at any timing position in the slot. FIG. 5 is a configuration diagram of the second embodiment and corresponds to the second principle configuration shown in FIG. FIG. 5 is an explanatory diagram of the reception level measurement according to the second embodiment.

In FIG. 5, reference numerals 30 to 34 and 341 to 343 in the reception level measurement timing control unit 34 are the same as those denoted by the same reference numerals in FIG. And
In the reception level measurement timing control unit 34, 344 is a carrier sense reception level measurement point setting register, 345 is a speech quality monitoring reception level measurement point setting register, 346.
Is a carrier sense / speech quality monitoring selection register, 347
Is a register selection unit.

In the configuration of the second embodiment, the processor 33 designates the carrier sense reception level measurement point setting register 344 so that the reception level measurement point (timing value) is set to the bus 33b.
Then, the reception level measurement point is set in the carrier sense reception level measurement point setting register 344. In this case, the carrier sense reception level measurement point setting register 344 sets arbitrary points on the front edge portion, the center portion, and the rear edge portion, respectively, as in the case of the first embodiment (FIG. 3). It has two registers and each measurement point is set. Further, when the processor 33 designates the reception level measuring point setting register 345 for monitoring the communication quality and inputs the reception level measuring point (timing value) for monitoring the communication quality via the bus 33b, the reception level measuring point is set. To be done.

In the state where carrier sensing is performed before the start of communication, data (for example, selection) for selecting the carrier sense reception level measurement point setting register 344 from the processor 33 of FIG. 5 to the carrier sense / communication quality monitoring selection register 346. 4) as the data whose bit indicating “1” is “1”). The respective timing values of at least three parts (leading edge, center, trailing edge) of the communication slot are set as shown in FIG. At this time, the register selection unit 347
Is the reception level measurement point setting register 3 for carrier sense
The data of 44 is output to the coincidence detection unit 342. The coincidence detection unit 342 is configured to detect a plurality of timing values of the carrier sense reception measurement point setting register 344 and the timing counter 3.
When the values of 41 are compared and a match is detected, the reception level measurement enable signal generation unit 343 is operated similarly to the operation of FIG.
Signal is generated to drive the reception level data extraction unit 31, and the reception level data is extracted (measured) at this timing.

Further, in the state where the call quality is monitored during communication, data for selecting the call quality monitoring reception level measurement point setting register 345 from the processor 33 of FIG. 5 to the carrier sense / call quality monitoring selection register 346. (For example, data in which the bit indicating selection is “0”) is set. When this data is given to the register selection unit 347, the register selection unit 347 outputs the data of the speech quality monitoring reception level measurement point setting register 345 to the coincidence detection unit 342, and the coincidence detection unit 342 outputs the data. When a match with the output is detected, a detection output is generated, and the reception level data is extracted at that timing as in the case of carrier sense.

In the configuration of FIG. 5, the carrier sense reception level measurement point setting register 344 includes a plurality of (at least three) registers for performing carrier sensing at a plurality of positions in the slot as described above. Equipped with
For example, in FIG. When three registers for setting the timing values corresponding to the front edge portion, the central portion, and the rear edge portion are provided as shown in FIG. 3, each timing value is set from the processing device 33 to each register.

When carrier sense is executed, when data for selecting the carrier sense reception level measurement point setting register (data whose selection instruction bit is "0") is set in the carrier sense / speech quality monitoring selection register 346. The register selection unit 347 selects the register in which the above three timing values are set, thereby measuring the reception level at each timing. When this selection is performed, different default values are set in the three registers in the carrier sense reception level measurement point setting register 344, and a common offset value is input from the processing device 33 to the plurality of registers. By doing so, it is possible to eliminate the need to set timing values individually.

For example, when the slot is composed of 230 bits, the values 0, 120 and 200 are set in the three registers as the default values of the leading edge portion, the center portion and the trailing edge portion. When an offset of "-20" (minus 20) is input from each register, each register substantially generates a timing value of -20, 100, 180, and the reception level is measured at that timing.

[0041]

According to the present invention, the timing for measuring the reception level can be arbitrarily adjusted by a simple means, so that the timing of measuring the reception level of carrier sense can be changed and the reception level can be measured with high accuracy for monitoring the communication quality. can do.

[Brief description of drawings]

FIG. 1 is a first principle configuration diagram of the present invention.

FIG. 2 is a second principle configuration diagram of the present invention.

FIG. 3 is a configuration diagram of a first embodiment.

FIG. 4 is an explanatory diagram of reception level measurement according to the present invention.

FIG. 5 is a configuration diagram of a second embodiment.

FIG. 6 is a configuration diagram of a conventional example.

FIG. 7 is an explanatory diagram of conventional reception level measurement.

[Explanation of symbols]

 1 reception level measurement timing control unit 10 timing setting unit 11 timing counter 12 coincidence detection unit 13 reception level measurement enable signal generation unit 2 antenna 3 reception level data extraction unit 4 external device

Claims (4)

[Claims] 1. In a reception level measurement timing adjustment method in mobile communication in which communication is performed using a slot of a radio channel including a plurality of slots, a radio device performing mobile communication receives a signal received from an antenna and enables reception level measurement. A reception level data extraction unit that extracts a reception level by a signal and a reception level measurement timing control unit that generates the reception level measurement enable signal are provided, and the reception level measurement timing control unit is an arbitrary slot in a designated channel. And a coincidence detecting means for detecting coincidence between the value of the timing setting means and the value of the timing counter for outputting each timing position in each slot. It is received by the reception level data extraction unit by the coincidence output of the means. A reception level measurement timing adjustment method in mobile communication, characterized by generating a signal level measurement enable signal. 2. The reception level measurement timing control unit according to claim 1, wherein an arbitrary reception level measurement timing value for carrier sense is externally set in the timing setting unit before communication is started. A reception level measurement timing adjustment method in mobile communication, wherein a reception level is measured, and during communication, an arbitrary reception level measurement timing value for call quality monitoring is externally set in the timing setting means. 3. The timing setting unit for carrier sensing according to claim 1, wherein the reception level measurement timing control unit is a timing setting unit for carrier sensing in which an arbitrary timing value for carrier sensing in a slot of the designated channel is externally set. , A timing setting means for monitoring the communication quality in which an arbitrary timing value for monitoring the communication quality in the slot is externally set, a selection part which receives an output from the two timing setting means, a carrier sense and a communication quality. Selection data setting means for generating a signal for controlling the selection portion according to the state of monitoring, and the selection portion is set by externally setting the selection data to the selection data setting means. Alternatively, one of the timing setting means for call quality monitoring may be selected and supplied to the coincidence detecting means. A method for adjusting the reception level measurement timing in mobile communications, characterized by. 4. The data set according to claim 3, wherein a plurality of timing setting means for setting a plurality of different timing values are provided as the timing setting means for carrier sense, and the selecting section sets the selected data setting means. A method for adjusting a reception level measurement timing in mobile communication, wherein each of the plurality of carrier sense registers is selected when the carrier sense register is selected by.