JP3169886B2 - Channel control method for digital mobile communication system. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a channel control method for a digital mobile communication system, and more particularly to a channel control method for a digital mobile communication system using a multi-channel access method.

[0002]

2. Description of the Related Art In a conventional channel control system of a digital mobile communication system using a multi-channel access system, the first communication control performed when a mobile station calls a base station is to control a control channel. Communication control for capturing, as a technique for capturing this control channel, of the wireless channels that can be used as a control channel among the wireless channels set between the own station and the surrounding base station > information channel for notifying the frequency, channel, and time being receiving the "channel information broadcast channel (perch channel)", then on the basis of the information obtained from the "perch channel", the frequency of the control channel There is a "perch channel" method that is a technology that can be known.

Next, the above-mentioned "perch channel" system will be described.

FIG. 4 is a flow chart showing a flow of a control channel acquisition operation in a channel control system of a conventional digital mobile communication system.

When a mobile station is powered on or comes in from outside the service area of a base station (step 21), for example, three radio frequencies (F1, F2) , F3) can be received. It is also assumed that two of the three radio frequencies (F1 and F2) are “perch channels”. The mobile station that is turned on or enters from outside the area first sets the frequency (F1) as a “perch channel” in the receiver of the mobile station (step 22), and determines the reception level (step 23). ). At this time, if the reception level of the frequency (F1) is not present or is equal to or less than the specified value (NO), the process returns to step 22 to change the setting to another frequency of the "perch channel" (F2) and repeat the step. At 23, the reception level is determined. If the reception level is not present even at the frequency (F2) or is equal to or lower than the specified value, the two radio frequencies of the “perch channel” (F
The above processing is repeated for 1 and F2).

For example, in step 23, the reception level of the frequency (F1) of the "perch channel" is equal to or higher than a specified value (YE
In the case of S), the frequency (F1) of the "perch channel" is received and decoded, and the "perch channel"
A control channel that can be used by the own station or a neighboring base station is checked based on the information held by the base station. At this time, it is assumed that two radio frequencies (F2 and F3) can be used as a control channel (step 24). The mobile station
Assuming that the frequency (F3) is set as the control channel from the two radio frequencies (F2 and F3), the frequency (F3) of the control channel is set in the receiver (step 25), and the reception level is set. A determination is made (step 26). When there is no reception level or below the specified value (NO
Returns to step 25, the setting is changed to another control channel frequency (F2), and this process is repeated between two radio frequencies (F2 and F3) until reception at a specified level is possible. If the reception level is equal to or higher than the specified value (in the case of YES), the control channel is received / decoded, the system broadcast information obtained from the received and decoded control channel is obtained (step 27), and a standby state is entered (step 27). 28).

By the time the mobile station enters the standby state, the mobile station normally performs at least two times of level verification processing and information acquisition from the reception channel by receiving the “perch channel” and the control channel. This has to be done, and the efficiency deteriorates in a system with a small number of radio channels that can be used as a “perch channel” and a control channel.

Next, as communication control performed by the mobile station, there is communication control performed when a call is made for a communication request.
The amount of control data included in the call signal is generally large, and the call signal is often composed of a plurality of frames. Also, when the mobile station transmits, the frame transmitted first at the start of transmission, that is, the first frame,
On the base station side, a guard signal is required to prevent collisions / interference with transmission frames from other mobile stations,
The signal format of the first frame is different from that of the continuous frame transmitted following the first frame. For this reason, in the signal receiving process at the base station, since it is not possible to determine whether the signal to be received is the first frame from the mobile station or a continuous frame, a receiving process to perform as if the received signal is the first frame, A reception process performed as a continuous frame is performed simultaneously and in parallel, and only a decoded frame signal is determined and received as a first frame or a continuous frame.
At this time, as the first frame, timing is set in the guard section, the remaining data section is decoded, and it is determined whether or not the received signal has been decoded. This determination processing can be easily realized by processing such as adding a check bit such as a CRC code in addition to error correction processing encoding. As for the continuation frame, the data section is decoded according to the signal synchronization received immediately before, and it is determined whether or not decoding is successful. By such determination processing, of the reception processing performed as the first frame and the reception processing performed as the continuation frame, which are performed simultaneously and in parallel, the frame received on the correctly received side is the signal received. It is determined that there is, and it is taken over to the next processing.

[0009] Further, a problem common to the mobile station and the base station is that the signal transmitted on the communication channel is information between the mobile stations such as a voice signal (a non-voice signal including a voice signal and a facsimile signal). Or, determination of control information for communication control, and determination of non-voice signals including voice signals and facsimile signals, and determination of whether the transmission signal during communication is a valid signal or an invalid signal, Although it is necessary to determine the type of various signals, these determination methods often employ an algorithm that performs reception processing of received signals simultaneously and in parallel.

[0010]

In the above-mentioned conventional channel control method of the digital mobile communication system, in the case of the "perch channel" method, which is a control channel acquisition technique, a perch channel for signaling is provided. There is a drawback in that the control channel becomes unnecessary in addition to the communication channel and that it takes a long time to acquire the regular control channel because the regular control channel cannot be identified until the perch channel is acquired.

In the base station, a method for determining the type of a frame signal received from a mobile station is described in the following. In order to determine whether a signal to be received is a head frame or a continuation frame from a mobile station, a signal to be received is determined. Has to be performed simultaneously and in parallel with the reception processing performed as a first frame and the reception processing performed as a continuous frame, which has a disadvantage that the processing circuit becomes complicated.

In the method of determining the type of a signal during communication, a process for determining the type of various signals during communication, that is, when a signal transmitted on a communication channel is a moving signal such as a voice signal. Judgment of information between stations or control information for communication control, judgment of non-speech-based signal including voice signal and facsimile signal, and valid or invalid transmission signal during communication Since the simultaneous and parallel processing necessary to perform various determinations such as the determination is performed, a high-speed reception signal processing unit used for a base station or a mobile station is required, and an expensive arithmetic CPU,
It has the disadvantage of requiring a signal processing algorithm that enables high-speed processing and a large memory capacity.

An object of the present invention is to reduce the time required to capture a control channel as in the perch channel method, and to eliminate the need for simultaneous and parallel processing for processing received signals and performing various signal types. It is an object of the present invention to provide a channel control method of a digital mobile communication system which can be completed.

[0014]

According to a first aspect of the present invention, there is provided a channel control system for a digital mobile communication system in which a base station including a mobile station or a line control station transmits a transmission signal to each other via a wireless channel. , the particular bit position within the frame of the transmission signal is no line channel signal that will be transmitted is arranged in frames, wherein the transmission signal Germany
Standing to encoding is performed, when the place the attribute information indicating an attribute of a radio channel transmitting the wireless channel signal, receiving the radio channel signals transmitted by the other party, of the radio channel signal Whether only the part of the attribute information indicating the attribute of the wireless channel arranged at a specific bit position in the frame is first extracted and decoded, and the transmission signal should be extracted based on the attribute information indicating the attribute of the wireless channel. When determining whether or not the transmission signal is to be extracted, a reception processing method for extracting the transmission signal is determined based on attribute information indicating an attribute of the wireless channel, and the transmission signal is extracted according to the reception processing method. It is configured to perform the receiving process.

Further, in the channel control method of the digital mobile communication system according to the second invention, when the base stations including the mobile station or the line control station mutually transmit a transmission signal to each other via a radio channel, Is placed at a specific bit position in the frame of a radio channel signal transmitted in a frame independently of the transmission signal.
And transmitting means for transmitting the radio channel signaling was performed, the attribute information indicating an attribute of the radio channel arrangement to,
Receiving the wireless channel signal via the wireless channel
To time, the radio only part of the attribute information indicating an attribute of a particular of the radio channels that are arranged in bit positions of the frame of the channel signals to first take out decoded, attribute information indicating an attribute of the radio channel A determination is made as to whether or not the transmission signal should be extracted, and if it is determined that the transmission signal should be extracted, a determination is made to determine a reception processing method for extracting the transmission signal, and the determined reception processing method is determined. Receiving means for performing the reception processing of the transmission signal in accordance with the following.

In a third aspect of the present invention, there is provided a channel control system for a digital mobile communication system, wherein when a base station including a mobile station or a line control station transmits a transmission signal to each other via a radio channel, to but the first bit position is a particular bit position within the frame of the radio channel signals transmitted are placed in the frame, said feeding
Attribute information indicating the attribute of the radio channel , which is coded independently of the radio signal, is arranged, and the transmission signal is transmitted to a second bit position that is a specific bit position in the frame of the radio channel signal. Transmitting means for arranging and transmitting, and when receiving the wireless channel signal via the wireless channel, the first bit arranged at a specific bit position in the frame of the wireless channel signal First, only the part of the attribute information indicating the attribute of the wireless channel of the position is extracted and decoded, and it is determined whether to extract the transmission signal based on the attribute information indicating the attribute of the wireless channel. When it is determined that the transmission signal should be extracted, a determination for determining a reception processing method for extracting the transmission signal is performed, and the transmission signal is determined according to the determined reception processing method. Constructed and a receiving means for performing signal processing.

The channel control method for a digital mobile communication system according to a fourth invention is the digital mobile communication system according to the first, second, or third invention. The attribute information indicating the attribute of the channel includes information indicating the type of the wireless channel, information indicating the structure of the frame of the wireless channel signal, and information indicating the type of the transmission signal.

The channel control method for a digital mobile communication system according to a fifth invention is the channel control method for a digital mobile communication system according to the fourth invention, wherein the information indicating the type of the radio channel is The information indicating the type of the channel is the control channel or the communication channel, and the information indicating the structure of the frame of the radio channel signal is information indicating the type of the frame of the received signal is a first frame or a continuous frame. , And the information indicating the type of the transmission signal is configured as information indicating the type of the control signal or the call signal.

Further, the channel control method for a digital mobile communication system according to the sixth invention is the channel control method for a digital mobile communication system according to the first invention, the second invention, or the third invention, wherein Are configured as bit positions common to all of the radio channel signals.

[0020]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a channel control system of a digital mobile communication system according to the present invention.

The channel control system of the digital mobile communication system according to the present embodiment shown in FIG. 1 is a mobile station 3, a base station 2 connected to the mobile station 3 by a radio channel, and a digital mobile communication system connected to the base station 2. It comprises a line control station 1 that controls the body communication system.

The mobile station 3 also includes an antenna 301 for transmitting and receiving radio frequency signals, a duplexer 302 for sharing the antenna for transmitting and receiving radio frequency signals, and modulating an encoded radio channel signal into a radio frequency signal. A transmitter 303 for transmitting via the antenna 301, a receiver 308 for demodulating a radio frequency signal received via the antenna 301 and outputting a radio channel signal, and a channel information signal to be transmitted to the base station 2 for attribute information of the radio channel A channel information signal processing unit 305 for extracting attribute information of a wireless channel from a channel information signal received from the base station 2 and transmitting the control information and a voice signal to the base station 2 via a control channel or a communication channel. A control / speech signal generated from the base station 2 via a control channel or a communication channel. Control / voice signal processing unit 309 for extracting control information and voice signals from the signal, performs error correction coding on the control / voice signal and channel information signal transmitted to the base station 2, and performs control / voice signal and channel An encoding processing unit 304 that generates a wireless channel signal from the information signal,
A decoding processing unit 307 that extracts a control / voice signal and a channel information signal from a wireless channel signal received from the base station 2 and decodes an error correction code. A control unit that generates attribute information and controls the operation of each unit of the mobile station based on the control information received from the base station and the attribute information of the radio channel;
6 is comprised.

The base station 2 has a control channel antenna 201, which is one of the radio channels with the mobile station 3.
Antennas 202 to 203 for a communication channel, which is one of the radio channels with the mobile station 3, a transceiver 204 for transmitting and receiving a control signal to and from the mobile station 3 via a control channel;
The mobile station 3 includes a plurality of transceivers 205 to 206 that transmit and receive voice signals and the like to and from the mobile station 3 via a communication channel.

Further, the line control station 1 generates a channel information signal transmitted via a control channel with the base station 2 from the attribute information of the radio channel, and generates an attribute of the radio channel from the received channel information signal. Control for generating, from control information, a control signal transmitted via a control channel between the channel information signal processing units 101, 103, and 104 for extracting information and the base station 2, and extracting control information from the received control signal The signal processing unit 102 generates a voice / control signal transmitted via a communication channel between the base station 2 from the voice signal or the like and the control information, and converts the voice signal / control signal and the control information from the received voice / control signal. The voice / control signal processing units 105 and 106 to be extracted, control information to be transmitted to the mobile station 3 and radio channel attribute information are generated, and the control information received from the mobile station 3 The control unit 107, which controls the operation of each unit of the base station 2 and the entire digital mobile communication system based on the attribute information of the line channel, and a voice signal and control information between the voice / control signal processing units 105 and 106. It comprises a signal exchange unit 108 for transmitting and receiving and exchanging signals of voice signals.

The transceiver 204 of the base station 2 performs error correction coding on the control signal and the channel information signal received from the line control station 1 via the control channel with the line control station 1. And an encoding processing unit 20 for generating a radio channel signal from the control signal and the channel information signal.
9. A transmitter 208 that modulates a radio channel signal output from the encoding processing unit 209 and transmits the modulated radio channel signal as a radio frequency signal to the mobile station 3, and transmits a radio frequency signal to the mobile station 3 and a radio signal from the mobile station 3. A duplexer 207 for sharing an antenna between reception of a frequency signal and a receiver 210 for receiving and demodulating a radio frequency signal from the mobile station 3 and outputting a radio channel signal from the mobile station 3, a received radio channel Decoding processing unit 21 for performing decoding processing of an error correction code on a signal
1

The transceiver 205 and the transceiver 206 of the base station 2 have the same configuration as the configuration of the transceiver 204, and include an encoding processing unit (not shown), a transmitter (not shown),
It comprises a duplexer (not shown), a receiver (not shown), and a decoding processing unit (not shown).
In the case of 4, via the control channel with the mobile station 3,
While configured to transmit and receive the control signal and the channel information signal included in the radio channel signal,
In the case of the transceiver 205 and the transceiver 206, a voice signal or the like, control information for communication control, and a channel information signal are transmitted to and received from the mobile station 3 via a communication channel.

FIG. 2 is a diagram showing a signal format configuration of a radio channel signal transmitted using a radio channel based on radio frequency signals between a mobile station and a base station in the channel control method of the digital mobile communication system of the present invention. It is.

The signal format shown in FIG. 2A is a signal format of a downlink signal, that is, a signal format of a radio channel signal from the base station 2 to the mobile station 3, and is a downlink radio signal in which a plurality of frames are continuous. This is a channel signal.
2B is a signal format of an uplink signal, that is, a signal format of a signal from the mobile station 3 to the base station 2, and is a burst signal including a plurality of frames, that is, an intermittent radio channel signal. is there.

The radio channel signal whose configuration is shown in the downlink signal format 401 in FIG. 2A is a data portion (DAT) composed of a control signal or a voice / control signal.
A) 403 and a radio channel information unit (RI) 404 composed of channel information signals constitute one frame.
This frame is continuously transmitted from the base station 2 to the mobile station 3.

The radio channel signal whose configuration is shown by the uplink signal format 402 in FIG. 2B is composed of a head frame and a continuation frame following the head frame.
The first frame is composed of a guard section (G) 405 composed of a guard signal for preventing collision and interference with a transmission frame of another mobile station, and composed of a control signal or a voice / control signal. Data part (DAT
A) 406 and a radio channel information section (RI) 406 composed of channel information signals.

Further, since the continuation frame is continuously transmitted to the head frame of the own station, the continuation frame does not need a guard portion, and the continuation frame is composed of only the data portion and the radio channel information portion.

The radio channel information section, as the wireless channel information 404 to the downlink signal shown in FIG. 2, also in the uplink signal is a radio channel information portion 407 is provided, all the frame It is provided to. In addition, the bit arrangement position in the signal format of the radio channel information section is the same in all frames regardless of the start frame and the continuation frame. Both the downlink signal in FIG. 2A and the uplink signal in FIG. 2B are provided at the end of the frame. However, there is no problem in system operation even if the bit arrangement position in the signal format of the uplink radio channel information section and the bit arrangement position in the signal format of the downlink radio channel information section are different from each other. .

Next, the operation will be described.

FIG. 3 is a flowchart showing the flow of the control channel acquisition operation in the channel control system of the digital mobile communication system of the present invention.

FIG. 3 illustrates the operation from when the mobile station 3 is turned on until the mobile station 3 captures the control channel and enters the standby state.

In the digital mobile communication system shown in FIG. 1, when the mobile station 3 turns on the power in the service area of the base station 2 or enters from outside the area, the frequency group of the downlink radio channel (F1, F2,
F3) can be received.

When the mobile station 3 is turned on in the service area of the base station 2 or comes in from another area (step 11), the radio frequency groups (F1, F2, F3) of the downlink radio channels are set. One of the radio frequencies is set in the receiver (step 12), and a level test is performed (step 13). If the reception level does not exist or is equal to or lower than the specified value (NO), the process returns to step 12 to change the setting to another radio frequency, and repeats this processing until reception at the specified level is possible. If the reception level is equal to or higher than the specified value (in the case of YES), only the part of the radio channel information part in the radio channel signal is received and decoded (step 14).
It is determined whether there is information indicating that the wireless channel on which the wireless channel signal is transmitted is a control channel (step 15). If there is no information indicating that the channel is a control channel or the information indicates that the channel is a communication channel (in the case of NO), the process returns to step 12 to set another downlink radio frequency and use the control channel. The processing from step 12 to step 15 is repeated until a radio frequency having information indicating the fact is found. If a radio frequency having information indicating the control channel is found (YES),
The data part on the signal format of the radio channel signal received at the radio frequency is decoded to obtain the system broadcast information stored therein (step 16), and the apparatus enters a standby state (step 17). As described above, according to the present invention, the mobile station 3 performs the level test processing of the radio frequency of the downlink radio channel, and the system broadcast information stored in the data part of the signal format of the received radio channel signal. By simply obtaining, you can enter the standby state.

Next, the operation of each station regarding the process of capturing the control channel by the mobile station 3 will be described in detail.

The control unit 107 of the line control station 1 converts a control signal into a data portion 40 of a radio channel signal through a downlink control channel in a signal format shown in FIG.
When transmitting to the mobile station 3 after storing the information in the data section 403, information indicating that the type of the wireless channel is the control channel, information indicating the type of the transmission frame structure, and the data section 403
It outputs to the channel information signal processing unit 101 radio channel information including information indicating that the type of the signal stored and transmitted in the control signal is a control signal, and controls the control information for generating the control signal. The signal is output to the signal processing unit 102. Channel information signal processing section 101 generates a channel information signal from wireless channel information. Control signal processing unit 10
2 generates a control signal from the control information.

In the base station 2, the transceiver 2 for the control channel
04 receives the channel information signal sent from the channel information signal processing unit 101 and the control signal sent from the control signal processing unit 102, and performs error correction coding processing on each of them. And then
According to the signal format shown in FIG.
03, a control signal is stored, and a channel information signal is stored in a radio channel information unit (RI) 404 to generate a radio channel signal. The generated wireless channel signal is transmitted to the transmitter 2
08, the signal is modulated to a radio frequency, transmitted to the antenna 201 via the duplexer 207, and transmitted from the antenna 201 to the mobile station 3.

On the other hand, when the mobile station 3 turns on the power in the service area of the base station 2 or enters from outside the service area, the control unit 306 transmits the downlink radio signal transmitted from the base station 2. Radio frequency group of channel (F
1, F2, F3) is selected, the selected radio frequency is set in the receiver 308, and the reception level of the received radio frequency is measured. As a result of the measurement of the reception level, if the reception level of the radio frequency (F1) exceeds the specified value, the receiver 308 receives and demodulates the radio frequency (F1), and
The wireless channel signal transmitted from the base station 2 according to 1) is transmitted to the decoding processing unit 307. Decryption processing unit 3
07 is a radio channel information part (R
I) The channel information signal stored in 404 is extracted, subjected to error correction code decoding processing, and output to the channel information signal processing unit 305. Channel information signal processing unit 3
05 determines whether or not information indicating that the type of the wireless channel is the control channel is included in the wireless channel information, and outputs the determination result to the control unit 306. If the determination result is not a control channel, the control unit 306 again returns to the radio frequency group (F1, F2, F3) of the downlink radio channel transmitted from the base station 2 except for the radio frequency (F1). Receiver 3
08 and the above operation is repeated. For example, when the above operation is repeated with the radio frequency (F2) set in the receiver 308, the radio channel information stored in the radio channel information section (RI) 404 in the received radio channel signal contains When it is detected that there is information indicating that the type of the wireless channel is a control channel,
The control unit 306 sends the base station 2
The control signal stored in the data section 403 in the radio channel signal transmitted via the control channel from the control signal is extracted and subjected to error correction code decoding processing, and
The audio signal processing unit 309 is output. The control / audio signal processing unit 309 extracts system notification information from the control signal and outputs the information to the control unit 306. The control unit 306 acquires the system broadcast information and places the mobile station 3 in a standby state.

In the above description, the control unit 1 of the line control station 1
07 describes a case where the control signal is stored in the data section 403 of the radio channel signal and transmitted to the mobile station 3 via the downlink control channel in the signal format shown in FIG. 1 control unit 107
Similarly to the above, a case where the voice / control signal from the signal switching unit 108 is stored in the data unit 403 of the wireless channel signal and transmitted to the mobile station 3 via the downlink communication channel will be described below.

The control unit 107 of the line control station 1 has information indicating that the type of the radio channel is a communication channel,
Information indicating the type of transmission frame structure, and data part 4
Wireless channel information including information indicating that the type of the signal stored and transmitted in 03 is a voice / control signal is output to the channel information signal processing unit 103. In addition, a voice signal and the like from the signal exchange unit 108 and control information from the control unit 107 are input to the voice / control signal processing unit 105. The channel information signal processing section 103 generates a channel information signal from the wireless channel information and sends it to the transceiver 205 of the base station 2. Also, the control signal processing unit 105
Is the voice signal from the signal exchange unit 108 and the control unit 1
A voice / control signal is generated from the control information from 07 and transmitted to the transceiver 205 of the base station 2. The transceiver 205 stores the voice / control signal in the data section 403 and stores the channel information signal in the radio channel information section (RI) 404 in accordance with the signal format shown in FIG. It is stored and transmitted to the mobile station 3.

The operation of the mobile station 3 is as follows. The radio frequency is set in the receiver 308, the reception level is measured, and the decoding processing unit 3
07 extracts the channel information signal from the radio channel signal, performs error correction code decoding processing, and outputs it to the channel information signal processing unit 305 until the control signal is transmitted through the downlink control channel to the radio channel signal. This is the same as the case where the data is stored in the data section 403 and transmitted to the mobile station 3.

Upon receiving the wireless channel signal, channel information signal processing section 305 determines whether or not information indicating that the type of the wireless channel is a speech channel is included in the wireless channel information. Is output to the control unit 306. In the control unit 306, if the determination result is not a communication channel, the radio frequency group (F1, F2, F3) of the downlink radio channel transmitted from the base station 2 again.
Among them, any radio frequency other than the radio frequency (F1) is set in the receiver 308, and the above operation is repeated. When another radio frequency is set to the receiver 308 and the above operation is repeated, when it is detected that the radio channel information includes information indicating that the type of the radio channel is the call channel, the control is performed. The unit 306 outputs the voice / audio data stored in the data unit 403 in the radio channel signal transmitted from the base station 2 to the decoding unit 307.
The control signal is taken out, the error correction code is decoded, and the control / audio signal processing unit 309 outputs the control signal. control·
The audio signal processing unit 309 extracts a control / audio signal from the audio / control signal and outputs the control / audio signal to the control unit 306.

Next, the operation of transmitting a call signal from mobile station 3 and the operation of receiving a call signal from mobile station 3 in base station 2 will be described.

In FIG. 1, when the mobile station 3 transmits a call signal to the base station 2 via the control channel, the control unit 3
06 is information indicating that the type of the wireless channel is the control channel, information indicating the type of the transmission frame structure, and the type of the signal stored and transmitted in the data unit 403 is a control signal for calling. Is output to the channel information signal processing unit 305, and a call signal for generating the control signal for calling is output to the control / voice signal processing unit 309. . The channel information signal processing unit 305 generates, for each frame, a channel information signal including information indicating whether the frame is the first frame or a continuous frame,
This is sent to the encoding processing unit 304. The control / voice signal processing unit 309 also generates a control signal for calling from the calling signal, and sends the control signal to the encoding processing unit 304. Encoding processing unit 304
Performs error correction coding processing on each of them, stores a control signal for calling in the data section 406 of the radio channel signal 402, and stores a channel information signal in the radio channel information section 407, Transmitter 303, duplexer 30
2 and the base station 2 via the antenna 301.

The base station 2 extracts only the channel information signal stored in the radio channel information section 407 from the radio channel signal received by the receiver 210 by the decoding processing section 211 and decodes the error correction code. Then, the channel information signal processing unit 101 of the line control station 1 extracts information information included in the channel information signal indicating whether the frame is the first frame or the continuous frame. , It is determined whether the frame is the first frame or the continuation frame. Based on the result of this determination, the decoding processing unit 211 receives the control signal for calling from the mobile station 3 stored in the data unit 406 in accordance with the instruction of the control unit 107 of the line control station 1. The frame of the channel signal is decoded by performing error correction code decoding processing as a head frame or as a continuation frame according to the frame structure determined by the above determination. Such processing is possible because the position where the channel information signal is stored is located at the same bit position in the leading frame and the continuation frame.

The process of determining the type of various signals during communication is performed as described in the process of determining the start frame and the continuation frame in the base station described above. Channel information section 40
4 (in the case of a downlink), or the radio channel information section 40
7 (in the case of an uplink), the channel information signal stored in the channel information signal is extracted and subjected to decoding processing of an error correction code, and based on information included in the decoded channel information signal, various kinds of signals being communicated are transmitted. A type determination process is performed, and based on the determination result, a received signal is decoded, so that a signal transmitted on a communication channel, which is a process common to the mobile station 3 and the base station 2, Determination of information between mobile stations such as voice signals or control information for communication control, determination of voice signals or non-voice signals including facsimile signals, and transmission signals during communication are valid The determination as to whether the signal is an invalid signal or the like can be made without involving concurrent reception processing.

[0051]

As described above, the channel control method of the digital mobile communication system according to the present invention is applied to a case where base stations including a mobile station or a line control station mutually transmit transmission signals to each other via a radio channel. Transmitting means for transmitting a wireless channel signal by arranging attribute information indicating an attribute of a wireless channel at a specific bit position in a frame of a wireless channel signal in which a transmission signal is arranged and transmitted in a frame; When a wireless channel signal is received, attribute information indicating the attribute of the wireless channel located at a specific bit position in the frame of the wireless channel signal is first extracted, and the transmission signal is extracted based on the attribute information indicating the attribute of the wireless channel. It is determined whether or not to extract the transmission signal, and when it is determined that the transmission signal should be extracted, a reception process for extracting the transmission signal is performed. A judgment to determine the method by which a receiving unit that performs reception processing of a transmission signal according to the method of the determined reception processing, "perch channel"
This is advantageous in that the control channel is not required, as in the case of the perch channel method, so that it does not take much time to capture the control channel, and it is possible to capture the control channel more quickly and more easily.

In addition, there is no need to perform simultaneous and parallel processing for processing received signals of the base station and the mobile station and to perform various kinds of signals, an expensive arithmetic CPU, a signal processing algorithm enabling high-speed processing, and This has the effect that the cost can be reduced even without a large-capacity memory.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a channel control system of a digital mobile communication system according to the present invention.

FIG. 2 is a diagram showing a signal format configuration of a radio channel signal of a channel control system of the digital mobile communication system of the present invention.

FIG. 3 is a flowchart showing a flow of a control channel acquisition operation in the channel control method of the digital mobile communication system of the present invention.

FIG. 4 is a flowchart showing a flow of a control channel acquisition operation in a channel control method of a conventional digital mobile communication system.

[Explanation of symbols]

 Reference Signs List 101 channel information signal processing unit 102 control signal processing unit 103, 104 channel information signal processing unit 105, 106 voice / control signal processing unit 107 control unit 108 signal exchange unit 201-203 antenna 204-206 transceiver 207 duplexer 208 transmitter 209 Encoding processing unit 210 Receiver 211 Decoding processing unit 301 Antenna 302 Duplexer 303 Transmitter 304 Encoding processing unit 305 Channel information signal processing unit 306 Control unit 307 Decoding processing unit 308 Receiver 309 Control / audio signal processing unit 401 Downlink signal format 402 Uplink signal format 403 Data section (DATA) 404 Radio channel information section (RI) 405 Guard section (G) 406 Data section (DATA) 407 Radio channel information section (RI)

Claims (6)

(57) [Claims] When a base station including a mobile station or a line control station transmits a transmission signal to each other via a wireless channel, the transmission signal is arranged in a frame and transmitted.
That the particular bit position within the frame of the non-linear channel signal, the transmission signal and independently encode was performed, and transmits the radio channel signals by placing the attribute information indicating an attribute of the radio channel , when receiving the radio channel signals transmitted by the other party, just the initially taking out part of the attribute information indicating an attribute of the deployed the radio channels the particular bit position of the frame of the radio channel signal Decoding, and determining whether to extract the transmission signal based on attribute information indicating the attribute of the wireless channel. When extracting the transmission signal, the transmission signal is determined based on attribute information indicating the attribute of the wireless channel. A receiving method for extracting the transmission signal, and performing the receiving process on the transmission signal in accordance with the receiving process method. Channel control method for a communication system. 2. When a base station including a mobile station or a channel control station transmits a transmission signal to each other via a radio channel, the transmission signal is arranged in the frame and transmitted in the frame of the radio channel signal transmitted. In a specific bit position, the transmission means that performs encoding independently of the transmission signal , arranges attribute information indicating the attribute of the wireless channel and transmits the wireless channel signal, and When receiving the wireless channel signal, the attribute information section indicating the attribute of the wireless channel arranged at a specific bit position in the frame of the wireless channel signal
First, only the minutes are extracted and decoded, and it is determined whether to extract the transmission signal based on the attribute information indicating the attribute of the wireless channel. When it is determined that the transmission signal is to be extracted, the transmission signal is extracted. And a receiving means for performing a receiving process for the transmission signal in accordance with the determined receiving process method. 3. When a base station including a mobile station or a line control station transmits a transmission signal to each other via a radio channel, the transmission signal is arranged in the frame and transmitted in the frame. the first bit position is a specific bit position of independent from that of the transmission signal
Coding was performed Te, transmitting said attribute information indicating an attribute of the radio channel is arranged to transmit the transmission signal placement to the second bit position is a particular bit position within the frame of the radio channel signal Means and, when receiving the radio channel signal via the radio channel, an attribute indicating an attribute of the radio channel at the first bit position located at a specific bit position in the frame of the radio channel signal First extract only the information part and decrypt it ,
A determination is made as to whether or not the transmission signal should be extracted based on attribute information indicating an attribute of the wireless channel. When it is determined that the transmission signal should be extracted, a determination to determine a reception processing method for extracting the transmission signal is performed. Receiving means for performing the reception processing of the transmission signal in accordance with the determined reception processing method. 4. The channel control method for a digital mobile communication system according to claim 1, wherein the attribute information indicating the attribute of the radio channel is:
A channel control method for a digital mobile communication system, comprising: information indicating a type of the radio channel, information indicating a frame structure of the radio channel signal, and information indicating a type of the transmission signal. 5. The channel control method for a digital mobile communication system according to claim 4, wherein the information indicating the type of the wireless channel is information indicating whether the wireless channel is the control channel or the communication channel. The information indicating the structure of the frame of the radio channel signal is information indicating a type of the frame of the received signal, whether the frame is a head frame or a continuation frame, and the information indicating the type of the transmission signal is a control signal or a call A channel control method for a digital mobile communication system, which is information indicating a type of a signal. 6. The channel control method for a digital mobile communication system according to claim 1, wherein the specific bit position is a bit position common to all of the radio channel signals. A channel control method for a digital mobile communication system.