JP6795665B2 - Wireless communication system, terminal wireless device, and headquarters device - Google Patents

Description

The technology disclosed in the present specification relates to a technology in a wireless communication system that performs wireless communication.

The time division multiple access (TDMA) type digital radio communication system includes a headquarters device, a base station device, a terminal radio device, and the like. Then, in the TDMA digital wireless communication system, a moving individual has a terminal wireless device, or the terminal wireless device is mounted on a moving vehicle or the like, so that the device is mainly connected to an existing communication network or between the terminal wireless devices. It is a wireless communication system that performs voice communication.

In the TDMA system adopted in the digital wireless communication system, a control channel (hereinafter, may be referred to as a control CH) is generally used to provide broadcast information, which is information necessary for system operation, to a terminal wireless device. The technology for notifying is known.

The broadcast information is a signal transmitted cyclically, that is, periodically from the main unit device using a plurality of wireless frames. The terminal wireless device takes in the above-mentioned notification information into its own station via a wireless line. Then, the terminal wireless device operates after the captured notification information reaches one cycle.

In order to receive the broadcast information, the terminal wireless device needs to constantly receive the above control channel in addition to the call channel (hereinafter, may be referred to as a call CH), for example, as illustrated in Patent Document 1. ..

Further, in order to prevent the terminal wireless device from continuously receiving the broadcast information, for example, as illustrated in Patent Document 2, the terminal wireless device is provided with a warning channel (hereinafter, hereinafter, only when the content of the broadcast information changes. In some cases, a method of transmitting a warning CH) was adopted.

Japanese Unexamined Patent Publication No. 2000-115068 Japanese Unexamined Patent Publication No. 11-317978

Since the conventional TDMA type digital wireless communication system is configured as described above, for example, in the case illustrated in Patent Document 1, the terminal wireless device needs to continuously receive a control channel other than the communication channel. There is. Therefore, there is a problem that the power consumption of the terminal wireless device is increased and the battery life is shortened.

Further, for example, in the case illustrated in Patent Document 2, since one slot in the wireless frame is occupied by the warning channel, there is a problem that the utilization efficiency of the call channel is deteriorated. Further, for example, in the case illustrated in Patent Document 2, since the terminal wireless device needs to receive the warning channel separately, the control operation in the terminal wireless device becomes complicated. Therefore, there is a problem that the power consumption of the terminal wireless device is increased and the battery life is shortened.

The technology disclosed in the present specification has been made to solve the problems described above, and is a wireless communication technology capable of receiving broadcast information while suppressing power consumption in the terminal wireless device. It is about.

A first aspect of the technique disclosed herein is a wireless communication system that performs presstalk voice communication via a wireless communication frame including a call channel and a control channel, of the call channel and the control channel. The head office device for allocating, a base station device for relaying the call channel from the head office device, and a terminal radio device connected to the base station device via a wireless frame are provided, and the terminal radio device is described as described above. It holds the generation number, which is a number that changes with the update of the broadcast information assigned to the control channel, and when in the battery saving state, it intermittently receives the call channel at each preset intermittent reception cycle, and the headquarters device. Manages the generation number of the broadcast information, allocates the broadcast information to the control channel, and when the wireless communication frame for transmission includes the voice information, the voice information is transmitted to the communication channel in the wireless communication frame. When the voice information is not included in the wireless communication frame to be allocated and transmitted, the generation number of the broadcast information is assigned to at least one of the communication channels in the wireless communication frame for each intermittent reception cycle. Allocation, the base station device relays the call channel from the headquarters device, and the terminal wireless device performs voice processing when the voice information is assigned to the call channel received in each intermittent reception cycle. When the generation number of the broadcast information is assigned to the call channel received in each intermittent reception cycle, the generation number held by the terminal wireless device and the generation assigned to the call channel are assigned. When it is determined that the generation number held by the terminal wireless device and the generation number assigned to the call channel are different from each other by comparing the numbers, the broadcast information assigned to the control channel is received and the voice is received. In the wireless communication frame that is continuous with the wireless communication frame that includes information and does not include the voice information, the generation number is assigned to the communication channel regardless of the passage of the intermittent reception cycle .

A second aspect of the technique disclosed herein is via a base station apparatus and a wireless frame in a wireless communication system that performs presstalk voice communication via a wireless communication frame including a call channel and a control channel. It is a terminal wireless device that is connected to the wireless device, holds a generation number that is a number that changes with the update of the notification information assigned to the control channel, and when in the battery saving state, every preset intermittent reception cycle. When the call channel is intermittently received and voice information is assigned to the call channel received in each intermittent reception cycle, voice processing is performed and the broadcast information is sent to the call channel received in each intermittent reception cycle. When the generation number assigned to the terminal wireless device is assigned, the generation number held by the terminal wireless device is compared with the generation number assigned to the call channel, and the generation number held by the terminal wireless device is compared with the generation number held by the terminal wireless device. If it is determined that the generation number assigned to the call channel is different, the broadcast information assigned to the control channel is received, and the voice information continuous with the wireless communication frame containing the voice information is not included. In the wireless communication frame, regardless of the passage of the intermittent reception cycle, the call channel to which the generation number is assigned is received, the generation number held by the terminal wireless device, and the call channel assigned to the call channel. When the generation number is compared and it is determined that the generation number held by the terminal wireless device and the generation number assigned to the communication channel are different, the broadcast information assigned to the control channel is received .

A third aspect of the technique disclosed in the present specification is the allocation of the call channel and the control channel in a wireless communication system that performs press talk voice communication via a wireless communication frame including a call channel and a control channel. When the wireless communication frame includes voice information, which allocates broadcast information to the control channel, manages a generation number which is a number changed with the update of the broadcast information, and transmits the wireless communication frame. When the voice information is not included in the wireless communication frame for allocating and transmitting the voice information to the call channel in the wireless communication frame, the call channel in the wireless communication frame is used for each preset intermittent reception cycle. Installing dividing the generation number of the broadcast information to at least one of the speech channels of the out, in the wireless communication frame that is not included the audio information to be continuous with the wireless communication frame included the audio information, the intermittent reception The generation number is assigned to the communication channel of the wireless communication frame regardless of the passage of the cycle .

A first aspect of the technique disclosed herein is a wireless communication system that performs presstalk voice communication via a wireless communication frame including a call channel and a control channel, of the call channel and the control channel. The head office device for allocating, a base station device for relaying the call channel from the head office device, and a terminal radio device connected to the base station device via a wireless frame are provided, and the terminal radio device is described as described above. It holds the generation number, which is a number that changes with the update of the broadcast information assigned to the control channel, and when in the battery saving state, it intermittently receives the call channel at each preset intermittent reception cycle, and the headquarters device. Manages the generation number of the broadcast information, allocates the broadcast information to the control channel, and when the wireless communication frame for transmission includes the voice information, the voice information is transmitted to the communication channel in the wireless communication frame. When the voice information is not included in the wireless communication frame to be allocated and transmitted, the generation number of the broadcast information is assigned to at least one of the communication channels in the wireless communication frame for each intermittent reception cycle. Allocation, the base station device relays the call channel from the headquarters device, and the terminal wireless device performs voice processing when the voice information is assigned to the call channel received in each intermittent reception cycle. When the generation number of the broadcast information is assigned to the call channel received in each intermittent reception cycle, the generation number held by the terminal wireless device and the generation assigned to the call channel are assigned. When it is determined that the generation number held by the terminal wireless device and the generation number assigned to the call channel are different from each other by comparing the numbers, the broadcast information assigned to the control channel is received and the voice is received. In the wireless communication frame that is continuous with the wireless communication frame that includes the information and does not include the voice information, the generation number is assigned to the communication channel regardless of the passage of the intermittent reception cycle . According to such a configuration, it is possible to receive the broadcast information while suppressing the power consumption of the terminal wireless device. That is, if the terminal wireless device monitors at least the call channel and receives the control channel when the generation number is assigned to the call channel and the generation number is the updated generation number, the broadcast information can be obtained. It can respond to updates.

A second aspect of the technique disclosed herein is via a base station apparatus and a wireless frame in a wireless communication system that performs presstalk voice communication via a wireless communication frame including a call channel and a control channel. It is a terminal wireless device that is connected to the wireless device, holds a generation number that is a number that changes with the update of the notification information assigned to the control channel, and when in the battery saving state, every preset intermittent reception cycle. When the call channel is intermittently received and voice information is assigned to the call channel received in each intermittent reception cycle, voice processing is performed and the broadcast information is sent to the call channel received in each intermittent reception cycle. When the generation number assigned to the terminal wireless device is assigned, the generation number held by the terminal wireless device is compared with the generation number assigned to the call channel, and the generation number held by the terminal wireless device is compared with the generation number held by the terminal wireless device. If it is determined that the generation number assigned to the call channel is different, the broadcast information assigned to the control channel is received, and the voice information continuous with the wireless communication frame containing the voice information is not included. In the wireless communication frame, regardless of the passage of the intermittent reception cycle, the call channel to which the generation number is assigned is received, the generation number held by the terminal wireless device, and the call channel assigned to the call channel. When the generation number is compared and it is determined that the generation number held by the terminal wireless device and the generation number assigned to the communication channel are different, the broadcast information assigned to the control channel is received . According to such a configuration, it is possible to receive the broadcast information while suppressing the power consumption of the terminal wireless device. That is, if the terminal wireless device monitors at least the call channel and receives the control channel when the generation number is assigned to the call channel and the generation number is the updated generation number, the broadcast information can be obtained. It can respond to updates.

A third aspect of the technique disclosed in the present specification is the allocation of the call channel and the control channel in a wireless communication system that performs press talk voice communication via a wireless communication frame including a call channel and a control channel. When the wireless communication frame includes voice information, which allocates broadcast information to the control channel, manages a generation number which is a number changed with the update of the broadcast information, and transmits the wireless communication frame. When the voice information is not included in the wireless communication frame for allocating and transmitting the voice information to the call channel in the wireless communication frame, the call channel in the wireless communication frame is used for each preset intermittent reception cycle. Installing dividing the generation number of the broadcast information to at least one of the speech channels of the out, in the wireless communication frame that is not included the audio information to be continuous with the wireless communication frame included the audio information, the intermittent reception The generation number is assigned to the communication channel of the wireless communication frame regardless of the passage of the cycle . According to such a configuration, it is possible to receive the broadcast information while suppressing the power consumption of the terminal wireless device. That is, if the terminal wireless device monitors at least the call channel and receives the control channel when the generation number is assigned to the call channel and the generation number is the updated generation number, the broadcast information can be obtained. It can respond to updates.

The objectives, features, aspects and advantages of the technology disclosed herein will be further clarified by the detailed description and accompanying drawings set forth below.

It is a figure which schematically exemplifies the whole structure of the wireless communication system which concerns on embodiment. It is a figure which illustrates the structure of the TDMA frame which concerns on embodiment. It is a figure which illustrates the downlink transmission timing in a wireless communication system which concerns on embodiment. It is a block diagram which conceptually illustrates the structure of the headquarters device and the structure of a base station device with respect to the embodiment. It is a block diagram which conceptually exemplifies the configuration of the terminal wireless device which concerns on embodiment. It is a figure which illustrates the relationship between the downlink transmission timing in a wireless communication system, and the battery saving of a terminal wireless device, according to the embodiment. It is a flowchart which illustrates the operation of the headquarters apparatus which concerns on embodiment. It is a flowchart which illustrates the operation of the terminal wireless device which concerns on embodiment. It is a figure which illustrates the relationship between the downlink transmission timing and the battery saving of the terminal wireless device in the wireless communication system which concerns on embodiment. It is a figure which illustrates the configuration in the case where the broadcast information in a control channel is divided into each radio frame about the Embodiment. It is a figure which illustrates the relationship between the downlink transmission timing in a wireless communication system, and the battery saving of a terminal wireless device, according to the embodiment.

Hereinafter, embodiments will be described with reference to the attached drawings.

It should be noted that the drawings are shown schematically, and for convenience of explanation, the configuration is omitted or the configuration is simplified as appropriate. Further, the interrelationship between the sizes and positions of the configurations and the like shown in the different drawings is not always accurately described and can be changed as appropriate.

Further, in the description shown below, similar components are illustrated with the same reference numerals, and their names and functions are also the same. Therefore, detailed description of them may be omitted to avoid duplication.

<First Embodiment>
Hereinafter, the headquarters device, the terminal wireless device, and the wireless communication system according to the present embodiment will be described.

<About the configuration of wireless communication system>
FIG. 1 is a diagram schematically illustrating an overall configuration of a wireless communication system according to the present embodiment. As illustrated in FIG. 1, the wireless communication system includes a headquarters device 10, a base station device 20, a base station device 21, and a terminal wireless device 30.

The headquarters device 10 is a device that accommodates a plurality of base station devices and controls a wireless communication system. The base station device 20 and the base station device 21 are respectively connected to the terminal wireless device 30 via a wireless line. Then, the base station device 20 and the base station device 21 relay the audio signal between the terminal wireless device 30 and the headquarters device 10, and also control the wireless line.

Area 200 is a communicable area of the base station apparatus 20. Further, the area 200 is an area that does not receive radio wave interference from the base station device 21.

The area 210 is a communicable area of the base station apparatus 21. Further, the area 210 is an area that does not receive radio wave interference from the base station device 20.

Area 300 is an area capable of communicating with both the base station apparatus 20 and the base station apparatus 21.

The wireless communication system is a system that mainly performs press talk voice communication. In the wireless communication system, the uplink audio signal transmitted from the terminal wireless device 30 is folded back by the headquarters device 10 and transmitted as a downlink audio signal to all base stations, that is, both the base station device 20 and the base station device 21. Will be done.

Here, the uplink signal is a signal transmitted in the order of the terminal wireless device 30, the base station device 20, the base station device 21, and the headquarters device 10. The downlink signal is a signal transmitted in the order of the head office device 10, the base station device 20, the base station device 21, and the terminal radio device 30.

In the wireless communication system, the terminal wireless device 30 is an audio signal output from another terminal wireless device 30 (not shown here) and returned by the headquarters device 10, that is, from the other terminal wireless device 30. In order to receive the output downlink voice signal via the headquarters device 10, the call channel, which is the channel to which the voice information is assigned, is monitored. Then, the terminal wireless device 30 receives the control channel when capturing the broadcast information.

The headquarters device 10 continues to transmit the broadcast information cyclically, that is, periodically using the control channel. The terminal wireless device 30 collects broadcast information by receiving the control channel only when necessary.

<Communication format>
Next, the communication format in the wireless communication system according to the present embodiment will be described.

FIG. 2 is a diagram illustrating a configuration of a TDMA frame as a wireless communication frame according to the present embodiment. In the wireless line, one frame is 40 ms. It takes 1 second in 25 frames.

Within one frame, four slots of 10 ms are provided for each of the uplink and the downlink. That is, one frame is composed of four slots. The number of slots constituting one frame is not limited to four, and may be another number. In FIG. 2, Slot1, Slot2, Slot3, and Slot4 correspond to four slots.

In addition, one set is composed of 25 frames. The number of wireless frames constituting one set is not limited to 25, and may be another number.

One slot is used as a control channel or a call channel. Also, for example, the press talk communication channel has two slots, that is, an offset of 20 ms, for each of the transmission slot and the reception slot.

Voice information, which is user information, is mapped, that is, assigned to the call channel. On the other hand, broadcast information, which is control information, is mapped to the control channel.

For example, the uplink signal transmitted from the terminal wireless device 30 in Slot 1 is arranged in the downlink signal of Slot 1 in the next frame by the main device 10, and is returned to the terminal wireless device 30.

In one frame, the number of slots to be the call channel mapping area, that is, the call channel mapping area, and the number of slots to be the control channel mapping area, that is, the control channel mapping area are preset. To. For example, in FIG. 3, in one radio frame, the first slot is the mapping area of the control channel 120, and the second slot is the mapping area of the call channel.

Note that FIG. 3 is a diagram illustrating downlink transmission timing in the wireless communication system according to the present embodiment.

Further, the number of the call channel mapping area of the wireless frame in one set is set in advance as the generation number notification information, that is, the mapping area of the generation number notification channel. Here, the generation number is a number that is changed with the update of the notification information. The generation number is held in the terminal wireless device 30 that receives the call channel. Further, the mapping area of the generation number notification information, that is, the mapping area of the generation number notification channel is also referred to as the generation number notification information mapping area. For example, in FIG. 3, in the case of the wireless frame group 1000 that does not include the downlink voice information, the call channel of the first wireless frame and the call channel of the second wireless frame in one set are set as the generation number notification information mapping area. And map the generation number notification channel 100, respectively. Alternatively, the call channel 100 to which the generation number notification information is mapped may be used. Alternatively, the generation number notification channel 100 may be mapped using the two regions.

In the case of the wireless frame group 1001 including the downlink voice information, the call channel is mapped to the predetermined call channel mapping area. That is, in the case of FIG. 3, the call channel 110 is mapped to each of the second slots in all the radio frames. Alternatively, it may be a call channel 110 to which voice information is mapped.

On the other hand, in the case of the wireless frame group 1000 that does not include the downlink voice information, the voice information is not mapped to the call channel mapping area. However, the generation number notification information, that is, the generation number notification channel 100 is mapped to the predetermined generation number notification information mapping area.

Further, neither the generation number notification information nor the voice information is mapped to the call channel 130. For example, a synchronization word for synchronizing the headquarters device and the terminal wireless device may be mapped to the call channel 130.

FIG. 4 is a block diagram conceptually illustrating the configuration of the headquarters device and the configuration of the base station device according to the present embodiment.

The base station device 20 is arranged at a wireless relay station or the like. The base station device 20 includes a base station control unit 22 and a radio unit 24. The base station device 21 is arranged at a wireless relay station or the like. The base station device 21 includes a base station control unit 26 and a radio unit 28.

The radio unit 24 and the radio unit 28 are relay radio equipment having a transmission / reception function. The wireless unit 24 and the wireless unit 28 are installed to relay bidirectional wireless communication between the main device 10 and the terminal wireless device 30 and between the terminal wireless devices 30.

The base station control unit 22 is a facility for monitoring the radio unit 24 and controlling the radio unit 24. The base station control unit 26 is a facility for monitoring the radio unit 28 and controlling the radio unit 28.

The base station control unit 22 and the base station control unit 26 may execute a program stored in a storage device, an external CD-ROM, an external DVD-ROM, an external flash memory, or the like. That is, for example, it may be a central processing unit (CPU), a microprocessor, a microprocessor, or a digital signal processor (DSP).

Further, the base station control unit 22 and the base station control unit 26 may be dedicated hardware. That is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an integrated circuit (ASIC), a field-programmable gate array (FPGA), or a combination of these. It may be.

The headquarters device 10 is arranged in a central facility or the like. The main unit device 10 includes a system management unit 14 and a communication control unit 12.

The system management unit 14 is a facility for monitoring the entire wireless communication system and controlling the operation of the wireless communication system. Specifically, the system management unit 14 monitors the status of each device constituting the wireless communication system or sets various controls.

The system management unit 14 also monitors the communication line in the wireless communication system and controls the communication line in the wireless communication system. Specifically, the system management unit 14 sets the configuration of the channel used in the wireless line, the channel allocation method, and the like.

The communication control unit 12 allocates channels to slots in each wireless frame according to the channel allocation method set in the system management unit 14. Further, the communication control unit 12 generates notification information and updates and manages the generation number of the notification information under the control of the system management unit 14. Further, the communication control unit 12 returns the uplink audio signal received from the terminal wireless device 30 via the base station device toward the terminal wireless device 30.

FIG. 5 is a block diagram that conceptually illustrates the configuration of the terminal wireless device according to the present embodiment. As illustrated in FIG. 5, the terminal wireless device 30 includes a wireless unit 32 and a control unit 34.

The radio unit 32 converts the transmission data from the control unit 34 into a digital signal / analog signal, and outputs the transmission data to the antenna 32D, and the transmission unit 32B and the signal received by the antenna 32D are converted into an analog signal / digital signal. It also includes a receiving unit 32C that outputs the signal to the control unit 34, and a transmission / reception switching unit 32A that relays between the antenna 32D and the transmitting unit 32B and between the antenna 32D and the receiving unit 32C.

The control unit 34 includes a modulation unit 34A, a channel CODE unit 34C, a demodulation unit 34B, a channel DECODE unit 34D, a monitoring control unit 34E, an operation display unit 34F, a voice processing unit 34G, and a voice interface unit 34H. To be equipped.

The control unit 34 may execute a program stored in a storage device, an external CD-ROM, an external DVD-ROM, an external flash memory, or the like. That is, for example, it may be a CPU, a microprocessor, a microcomputer, or a DSP.

Further, the control unit 34 may be dedicated hardware. That is, it may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.

When the terminal wireless device 30 receives the downlink signal from the base station device, the received data received by the receiving unit 32C is demodulated by the demodulation unit 34B. Then, the channel DECODE unit 34D extracts the mapped information from the received data, and the monitoring control unit 34E confirms the data and analyzes the data.

The data confirmation and data analysis referred to here refer to the presence / absence of voice information, the generation number of broadcast information, or the confirmation and analysis of other control information. When the voice information is received, the data is processed by the voice processing unit 34G, and further output by the voice interface unit 34H, specifically, a speaker or the like.

When an uplink voice signal is transmitted from the terminal radio device 30 to the base station device, the voice signal input from the voice interface unit 34H, specifically, a microphone or the like is processed by the voice processing unit 34G. Then, the audio signal is input to the monitoring control unit 34E.

Then, after the monitoring and control unit 34E confirms the data and analyzes the data, the channel CODE unit 34C maps the data to the specified channel configuration. After that, the modulation unit 34A performs the modulation processing of the data, and outputs the transmission signal to the radio unit 32.

The wireless communication system according to the present embodiment is a wireless communication system that mainly performs press talk voice communication. Therefore, the terminal wireless device 30 monitors the presence or absence of downlink audio signals from the other terminal wireless device 30.

FIG. 6 is a diagram illustrating the relationship between the downlink transmission timing and the battery saving of the terminal wireless device in the wireless communication system according to the present embodiment.

The terminal wireless device 30 receives the call channel and determines whether or not the voice information is mapped to the call channel. When it is determined that the voice information is mapped, that is, when the radio frame group 1001 in FIG. 6 is used, the terminal radio device 30 performs the voice signal reception process.

On the other hand, if it is determined that the voice information is not mapped to the call channel, that is, in the case of the wireless frame group 1000 in FIG. 6, is the terminal wireless device 30 mapped to the generation number notification information? Judge whether or not. When the generation number notification information is mapped, the terminal wireless device 30 compares the generation number held in the terminal wireless device 30 with the received generation number notification information. If the results of the comparison are the same, the saving state is maintained until the preset intermittent reception timing. The wireless frame group 1002 in FIG. 6 indicates the reception timing of the communication channel of the terminal wireless device 30. The terminal wireless device 30 that receives the generation number notification information, compares the generation number held in the terminal wireless device 30 with the received generation number notification information, and determines that they are the same, maintains the saving state and makes a call. It is not necessary to receive the channel 130. Neither the generation number notification information nor the voice information is mapped to the call channel 130. For example, a synchronization word for synchronizing the headquarters device and the terminal wireless device may be mapped to the call channel 130.

However, even if the voice information is not mapped to the call channel, if it is confirmed that the generation number notification information, that is, the generation number notification channel is mapped to the call channel, the monitoring control unit 34E may perform the terminal wireless device 30. Compares the generation number of the broadcast information currently held by the user with the generation number of the generation number channel mapped in the received call channel. The wireless frame group 1003 in FIG. 6 compares the generation number of the broadcast information currently stored by the monitoring control unit 34E of the terminal wireless device 30 with the generation number of the generation number channel mapped in the received call channel. However, the reception timing of the call channel (generation number notification channel) and the control channel when it is judged to be different, that is, when it is judged to be updated is shown.

If the generation number stored in the monitoring control unit 34E and the generation number of the received generation number channel are different, the monitoring control unit 34E states that the notification information has been updated since the previous monitoring control unit 34E received the notification information. to decide. After that, the terminal wireless device 30 receives the control channel and takes in the updated notification information. That is, the control channel in the radio frame group 1003 of FIG. 6 is received.

<About the operation of wireless communication system>
Next, the operation of the wireless communication system according to the present embodiment will be described.

First, the wireless frame timing of the downlink transmitted from the main device 10 is set to one set, that is, a fixed cycle in which 25 frames are 1 second, as in the case illustrated in FIG. Then, as illustrated in FIG. 6, for example, the call channel of the first radio frame and the call channel of the second radio frame in one set are mapped as the generation number notification channel 100. However, there may be at least one call channel mapped as the generation number notification channel 100 in one radio frame.

In the call state in which the voice signal is transmitted, the call channel is not mapped as the generation number notification channel, but is mapped as the call channel to which the voice information is assigned to all 25 frames.

Depending on the configuration of the wireless frame format, it is possible to transmit control information such as generation number notification and voice information at the same time, but for convenience of explanation in the present embodiment, generations are used on one call channel. It is assumed that the number notification channel and the call channel to which voice information is assigned cannot be transmitted at the same time.

The generation number notification channel is a channel for notifying the generation number of the broadcast information on the call channel. The terminal wireless device 30 determines whether or not the broadcast information held in the terminal wireless device 30 is the latest, based on the generation number in the generation number notification channel. Then, the terminal wireless device 30 determines whether or not it is necessary to capture the broadcast information.

Next, the battery saving operation of the terminal wireless device 30 will be described with reference to FIG. Generally, the terminal wireless device 30 enters saving from the time when there is no signal to be received, and maintains the saving state for a certain period of time.

After the above-mentioned fixed time has elapsed, that is, after the intermittent reception cycle has elapsed in FIG. 6, the terminal wireless device 30 releases the saving state. In FIG. 6, the intermittent reception cycle corresponds to two sets, that is, 50 frames of wireless frames.

Further, if the generation number does not change at this point, the terminal wireless device 30 is put into a saving state again to prolong the life of the battery.

The longer the saving state, the higher the saving effect. However, the acquisition of broadcast information is delayed.

Next, the operation of the terminal wireless device 30 when there is a change in the broadcast information will be described. The terminal wireless device 30 that periodically repeats the saving state releases the saving state at the timing when the generation number notification channel mapped to the call channel is transmitted.

Next, the terminal wireless device 30 acquires the generation number of the broadcast information from the generation number notification channel. Then, the terminal wireless device 30 compares the generation number held in the terminal wireless device 30 with the generation number of the generation number channel to determine whether or not the notification information held in the terminal wireless device 30 is the latest. To determine.

If there is a change in the generation number acquired from the generation number notification channel, the terminal wireless device 30 determines that the notification information held in the terminal wireless device 30 is not the latest. Then, the monitoring control unit 34E of the terminal wireless device 30 changes the receiving slot from the call channel to the control channel. That is, as illustrated in the radio frame group 1003 of FIG. 6, the broadcast information of the control channel is taken in from the next radio frame.

The terminal wireless device 30 takes in new notification information, specifically, one cycle of the notification information, and then enters the saving state again until the remaining intermittent reception cycle elapses. In addition, in FIG. 6, it is described that one cycle of the broadcast information is one set.

Next, the operation of the terminal wireless device 30 when there is no change in the broadcast information will be described. The terminal wireless device 30 acquires the generation number of the broadcast information from the generation number notification channel mapped to the call channel.

Then, if there is no change in the generation number acquired from the generation number notification channel, that is, if the generation number held in the terminal radio device 30 and the generation number of the generation number channel are the same, the terminal radio device 30 As illustrated in the radio frame group 1002 of FIG. 6, the saving state is entered again from the next radio frame. Then, if there is no call, the terminal wireless device 30 remains in the saving state until the remaining intermittent reception cycle elapses.

Next, the operation of the main unit device 10 will be described with reference to FIG. 7. Here, FIG. 7 is a flowchart illustrating the operation of the headquarters device according to the present embodiment.

First, the headquarters device 10 determines whether or not an uplink voice signal is received from the terminal wireless device 30 (see step ST01).

Then, when the uplink voice signal is received, the headquarters device 10 maps the voice information in the received voice signal to the call channel. Then, the headquarters device 10 returns and transmits the voice information mapped to the call channel to the terminal wireless device 30 (see step ST02). Then, the process ends.

On the other hand, when the uplink voice signal is not received, the headquarters device 10 determines whether or not there is notification information to be updated (see step ST03). Then, when there is notification information to be updated, the headquarters device 10 updates the generation number of the notification information (see step ST04). On the other hand, if there is no notification information to be updated, the process proceeds to step ST05. Here, the broadcast information to be updated is, for example, carrier information, that is, carrier frequency information, transmission / reception slot information, communication system information, and the like.

The headquarters device 10 then maps the generation number to the call channel (see step ST05). When the generation number of the broadcast information is updated in step ST04, the updated generation number is mapped to the call channel. Then, the headquarters device 10 transmits the information to the terminal wireless device 30.

Next, the operation of the terminal wireless device 30 will be described with reference to FIG. Here, FIG. 8 is a flowchart illustrating the operation of the terminal wireless device according to the present embodiment.

First, the terminal wireless device 30 receives the call channel and analyzes the information contained in the call channel (see step ST101). Next, the terminal wireless device 30 determines whether or not the voice information is mapped to the received call channel (see step ST102).

When the voice information is mapped to the received call channel, the terminal wireless device 30 performs voice processing. Then, after that, the terminal wireless device 30 outputs a voice signal via the voice interface unit 34H (see step ST103).

On the other hand, when the voice information is not mapped to the received call channel, the terminal wireless device 30 determines whether or not the generation number mapped to the received call channel is updated (). See step ST104).

When the generation number of the broadcast information is updated, the monitoring control unit 34E of the terminal wireless device 30 changes the reception channel on the downlink from the call channel to the control channel. Then, the terminal wireless device 30 acquires the broadcast information again (see step ST106). By doing so, it is possible to respond to system changes.

On the other hand, if the generation number of the broadcast information is not updated, the terminal wireless device 30 continues the operation in the saving state (see step ST105).

For example, the following effects can be obtained by the operation in the present embodiment described above.

The headquarters device 10 manages the update of the generation number of the broadcast information. Then, when the notification information transmitted on the control channel is updated, the headquarters device 10 maps the generation number to the call channel.

The terminal wireless device 30 can collect broadcast information from the control channel when it detects a change in the generation number in the call channel.

With such a configuration, the load of the reception operation of the terminal wireless device 30 can be reduced. In addition, it is possible to realize optimization of capture of broadcast information and battery saving.

By mapping the generation number notification information, that is, the generation number notification channel to the call channel mapping area, the terminal radio device 30 receives at least the call channel mapping area to receive the voice signal from the other terminal radio device 30. A return signal can be received. At the same time, the terminal wireless device 30 can also know that the notification information has been updated.

Further, when the downlink voice information is included in the mapping area of the generation number notification information, that is, the mapping area of the generation number notification channel, the generation number notification information is not mapped, and the call channel is mapped. As a result, the terminal wireless device 30 can receive the return signal of the audio signal from the other terminal wireless device 30 by monitoring the mapping area of the generation number notification information. At the same time, the terminal wireless device 30 can also know that the notification information has been updated.

<Second Embodiment>
The headquarters device, the terminal wireless device, and the wireless communication system according to the present embodiment will be described. In the following description, configurations similar to those described in the embodiments described above will be illustrated with the same reference numerals, and detailed description thereof will be omitted as appropriate.

In the first embodiment, when there is no call, that is, when the voice information is not included in the call channel, the load of the reception operation of the terminal wireless device 30 can be reduced, and the notification. The effects that can realize the optimization of information capture and battery saving were shown respectively. In the present embodiment, further, a case where there is a call, that is, a case where voice information is included in the call channel will be described as an example.

FIG. 9 is a diagram illustrating the relationship between the downlink transmission timing and the battery saving of the terminal wireless device in the wireless communication system according to the present embodiment. The downlink wireless frame timing transmitted from the main device 10 and the battery saving operation of the terminal wireless device 30 are the same as those illustrated in the first embodiment.

Next, the operation of the wireless communication system according to the present embodiment will be described. When the call channel to which the voice information is mapped is received on the downlink, the terminal wireless device 30 releases the saving state.

From the main unit device 10, the generation number notification channel is continuously transmitted on the downlink to be transmitted after the call is completed. That is, the headquarters device 10 assigns the generation number of the broadcast information to at least one call channel in the wireless communication frame that does not include the voice information and is transmitted continuously after the wireless communication frame that includes the voice information. The headquarters device 10 continuously assigns the generation number of the broadcast information to the call channel regardless of whether or not the intermittent reception cycle has elapsed after the end of the call. Further, the terminal wireless device 30 continuously receives the call channel, which is the generation number notification channel, after the end of the call, regardless of whether or not the intermittent reception cycle has elapsed.

By doing so, for example, as in the wireless frame group 1004 illustrated in FIG. 9, if there is a change in the generation number in the generation number notification channel, the terminal wireless device 30 continuously captures the notification information after the call ends. be able to.

For comparison of operations, the operation of the wireless communication system when the notification channel is not transmitted after the end of the call as in the wireless frame group 1005 exemplified in FIG. 9 will be referred to.

In the case of the wireless frame group 1005 illustrated in FIG. 9, the terminal wireless device 30 is in the saving state until the intermittent reception cycle elapses after the end of the call. Therefore, the terminal wireless device 30 receives the generation number notification channel at the timing of releasing the next saving state.

Therefore, the acquisition of the broadcast information by the terminal wireless device 30 is delayed by the time, that is, one cycle of the intermittent reception.

Next, from the viewpoint of the effect of battery saving, the wireless frame group 1004 in FIG. 9 and the wireless frame group 1005 in FIG. 9 are compared.

The number of wireless frames received by the terminal wireless device 30 is the same for the wireless frame group 1004 in FIG. 9 and the wireless frame group 1005 in FIG. However, in the radio frame group 1004 in FIG. 9, the generation number notification channel can be continuously captured during the cancellation of one saving operation. Therefore, the number of saving operations, that is, the number of times of switching ON / OFF of saving is smaller in the wireless frame group 1004 in FIG. 9 than in the wireless frame group 1005 in FIG. Therefore, the wireless frame group 1004 in FIG. 9 has a higher saving effect.

As described above, the head office device 10 continuously notifies the generation number after the end of the call, so that the terminal wireless device 30 can continuously receive the generation notification number from the start of the call. Further, if there is a change in the generation number in the generation number notification channel, the terminal wireless device 30 can capture the broadcast information following the generation notification number.

Therefore, the number of saving switchings can be reduced. In addition, it is possible to realize optimization of capture of broadcast information and battery saving.

<Third embodiment>
The headquarters device, the terminal wireless device, and the wireless communication system according to the present embodiment will be described. In the following description, configurations similar to those described in the embodiments described above will be illustrated with the same reference numerals, and detailed description thereof will be omitted as appropriate.

In this embodiment, a case of improving the battery life will be described as an example.

FIG. 10 is a diagram illustrating a configuration when the broadcast information in the control channel is divided into categories. The headquarters device 10 maps the broadcast information of each category to the control channel of the radio frame number in FIG. 10 and transmits it to the terminal radio device 30.

Next, the operation of the wireless communication system according to the present embodiment will be described. FIG. 11 is a diagram illustrating the relationship between the downlink transmission timing and the battery saving of the terminal wireless device in the wireless communication system according to the present embodiment.

In the radio frame group 1006 of FIG. 11, the second slot in the first radio frame in one set is the mapping area of the generation number notification channel 100, and the second slot in the second radio frame in one set. Is used as the mapping area of the generation number notification channel 100.

Further, the radio frame group 1007 in FIG. 11 shows the reception timing of the call channel, the generation number notification channel, and the control channel when the generation number notification channel is transmitted after the end of the call.

The downlink wireless frame timing transmitted from the headquarters device 10 and the battery saving operation of the terminal wireless device 30 are exemplified in the case of the first embodiment and in the second embodiment. It is the same as when it is done.

In the present embodiment, the generation number is notified for each category of the broadcast information.

When the change in the generation number is detected by the same procedure as the procedure exemplified in the first embodiment and the second embodiment, the terminal radio device 30 receives the control channel to capture the broadcast information.

The terminal wireless device 30 determines whether or not the generation number for each category in the received generation number notification channel has been updated, and the control CH of the wireless frame to which the broadcast information of the category determined to be updated is mapped. To receive. FIG. 11 illustrates a case where the notification information of the category number “1” and the category number “2” is updated. As illustrated in the radio frame group 1007 in FIG. 11, it is possible to determine in which radio frame the broadcast information to be acquired again is transmitted. That is, by determining which category of the generation number has been updated, it is possible to determine the wireless frame to which the changed notification information is transmitted. Therefore, the terminal wireless device 30 identifies the type of notification information that needs to be updated, that is, the type of notification information for which the generation number has changed, and receives the reception operation according to the radio frame timing including the type of notification information. It can be performed. Then, the terminal wireless device 30 can compare the generation numbers for each type of broadcast information. After taking in the changed notification information, the terminal wireless device 30 enters the saving state.

Therefore, the terminal wireless device 30 can enter the saving state at the wireless frame timing in which the notification information that does not need to be updated, that is, the notification information in which the generation number has not changed is transmitted.

By the above operation, according to the wireless communication system according to the present embodiment, the battery life of the terminal wireless device 30 can be improved.

<About the effect caused by the above-described embodiment>
Next, the effects produced by the above-described embodiments will be illustrated. In the following description, the effect is described based on the specific configuration exemplified in the above-described embodiment, but is exemplified in the present specification to the extent that the same effect occurs. It may be replaced with other specific configurations.

Further, the replacement may be made across a plurality of embodiments. That is, it may be the case that the respective configurations exemplified in the different embodiments are combined to produce the same effect.

According to the embodiment described above, the headquarters device includes a management unit that manages the generation number of the broadcast information and a communication control unit 12 that controls wireless communication. Then, the communication control unit 12 allocates the broadcast information to the control channel 120. Then, when the wireless communication frame to be transmitted contains voice information, the communication control unit 12 allocates the voice information to the call channel 110 in the wireless communication frame. Then, when the wireless communication frame to be transmitted does not include voice information, the communication control unit 12 assigns a generation number of the broadcast information to at least one of the communication channels 110 in the wireless communication frame. Here, the management unit corresponds to, for example, the system management unit 14.

According to such a configuration, it is possible to receive the broadcast information while suppressing the power consumption of the terminal wireless device 30. That is, if the terminal wireless device monitors at least the call channel 110 and receives the control channel 120 when the call channel 110 is assigned a generation number and the generation number is the updated generation number. It is possible to respond to the update of the notification information. Therefore, the operation control in the terminal wireless device 30 is not complicated. Further, since it is not necessary for the terminal wireless device 30 to constantly monitor the control channel 120, the battery life of the terminal wireless device 30 can be improved.

In addition to these configurations, other configurations exemplified in the present specification may be omitted as appropriate. That is, if at least these configurations are provided, the effects described above can be produced.

However, when at least one of the other configurations exemplified in the present specification is appropriately added to the above-described configuration, that is, in the present specification not described as the above-described configuration. Even when the other configurations described above are added to the configurations described above, the effects described above can be similarly produced.

Further, according to the embodiment described above, the management unit updates the generation number of the notification information when the notification information is updated. Then, when the wireless communication frame to be transmitted does not include voice information, the communication control unit 12 assigns an updated generation number of the broadcast information to at least one of the call channels 110 in the wireless communication frame. .. Here, the management unit corresponds to, for example, the system management unit 14. According to such a configuration, the terminal wireless device 30 monitors at least the call channel 110, and controls when the call channel 110 is assigned a generation number and the generation number is an updated generation number. If the channel 120 is received, it is possible to respond to the update of the broadcast information. Therefore, the operation control in the terminal wireless device 30 is not complicated. Further, since it is not necessary for the terminal wireless device 30 to constantly monitor the control channel 120, the battery life of the terminal wireless device 30 can be improved.

Further, according to the embodiment described above, the broadcast information is classified into a plurality of types. Then, the management unit updates the corresponding generation number for each type of updated notification information. Here, the management unit corresponds to, for example, the system management unit 14. According to such a configuration, the terminal wireless device 30 identifies the type of notification information that needs to be updated, that is, the type of notification information for which the generation number has changed, and the wireless frame including the type of notification information. The reception operation can be performed according to the timing. Then, the terminal wireless device 30 can compare the generation numbers for each type of broadcast information. Therefore, the terminal wireless device 30 can enter the saving state at the wireless frame timing in which the notification information that does not need to be updated, that is, the notification information in which the generation number has not changed is transmitted. Therefore, the battery life of the terminal wireless device 30 can be improved.

Further, according to the embodiment described above, the communication control unit 12 is at least one of the call channels 110 in the wireless communication frame containing voice information and the wireless communication frame not including continuous voice information. A generation number of broadcast information is assigned to the call channel 110. According to such a configuration, if there is a change in the generation number, the terminal wireless device 30 can continuously capture the broadcast information after the end of the call. Therefore, it is possible to prevent the terminal wireless device 30 from delaying the acquisition of the broadcast information. Further, since the number of times of switching ON / OFF of saving is reduced, the saving effect of the terminal wireless device 30 is enhanced.

According to the embodiment described above, the generation number of the broadcast information is retained in the terminal wireless device. The terminal wireless device includes at least a receiving unit 32C for receiving the call channel 110 and a receiving control unit for controlling the operation of the receiving unit 32C. When the generation number of the notification information is assigned to the call channel 110, the reception control unit compares the generation number of the notification information held by the terminal wireless device 30 with the generation number of the notification information assigned to the call channel 110. When the generation number of the broadcast information held by the terminal wireless device 30 and the generation number of the broadcast information assigned to the call channel 110 are different, the receiving unit 32C is made to receive the broadcast information assigned to the control channel 120. Here, the reception control unit corresponds to, for example, the monitoring control unit 34E.

According to such a configuration, it is possible to receive the broadcast information while suppressing the power consumption of the terminal wireless device 30. That is, if the terminal wireless device monitors at least the call channel 110 and receives the control channel 120 when the call channel 110 is assigned a generation number and the generation number is the updated generation number. It is possible to respond to the update of the notification information.

In addition to these configurations, other configurations exemplified in the present specification may be omitted as appropriate. That is, if at least these configurations are provided, the effects described above can be produced.

However, when at least one of the other configurations exemplified in the present specification is appropriately added to the above-described configuration, that is, in the present specification not described as the above-described configuration. Even when the other configurations described above are added to the configurations described above, the effects described above can be similarly produced.

Further, according to the embodiment described above, when the call channel 110 is assigned the updated generation number of the notification information, the reception control unit notifies the reception unit 32C of the notification assigned to the control channel 120. Receive information. Here, the reception control unit corresponds to, for example, the monitoring control unit 34E. According to such a configuration, the terminal wireless device 30 monitors at least the call channel 110, and controls when the call channel 110 is assigned a generation number and the generation number is an updated generation number. If the channel 120 is received, it is possible to respond to the update of the broadcast information. Therefore, the operation control in the terminal wireless device 30 is not complicated. Further, since it is not necessary for the terminal wireless device 30 to constantly monitor the control channel 120, the battery life of the terminal wireless device 30 can be improved.

Further, according to the embodiment described above, the broadcast information is classified into a plurality of types. Then, when the generation number of the broadcast information is assigned to the call channel 110, the reception control unit is assigned to the generation number of the broadcast information held by the terminal wireless device 30 and the call channel 110 for each type of the broadcast information. Compare with the generation number of the broadcast information. Here, the reception control unit corresponds to, for example, the monitoring control unit 34E. According to such a configuration, the terminal wireless device 30 identifies the type of notification information that needs to be updated, that is, the type of notification information for which the generation number has changed, and the wireless frame including the type of notification information. The reception operation can be performed according to the timing. Then, after capturing the broadcast information, the terminal wireless device 30 can enter the saving state. Therefore, the terminal wireless device 30 can enter the saving state at the wireless frame timing in which the notification information that does not need to be updated, that is, the notification information in which the generation number has not changed is transmitted, so that the battery of the terminal wireless device 30 You can improve your time.

Further, according to the embodiment described above, in the wireless communication system, the terminal wireless device 30 holds the generation number of the broadcast information. The headquarters device 10 includes a management unit that manages the generation number of the broadcast information and a communication control unit 12 that controls wireless communication. Then, the communication control unit 12 allocates the broadcast information to the control channel 120. Then, when the wireless communication frame to be transmitted contains voice information, the communication control unit 12 allocates the voice information to the call channel 110 in the wireless communication frame. Then, when the wireless communication frame to be transmitted does not include voice information, the communication control unit 12 assigns a generation number of the broadcast information to at least one of the communication channels 110 in the wireless communication frame. Further, the terminal wireless device 30 includes at least a receiving unit 32C for receiving the call channel 110 and a receiving control unit for controlling the operation of the receiving unit 32C. Then, when the generation number of the notification information is assigned to the call channel 110, the reception control unit assigns the generation number of the notification information held by the terminal wireless device 30 and the generation number of the notification information assigned to the call channel 110. By comparison, when the generation number of the notification information held by the terminal wireless device 30 and the generation number of the notification information assigned to the call channel 110 are different, the receiving unit 32C receives the notification information assigned to the control channel 120. Let me. Here, the management unit corresponds to, for example, the system management unit 14. Further, the reception control unit corresponds to, for example, the monitoring control unit 34E. According to such a configuration, it is possible to receive the broadcast information while suppressing the power consumption of the terminal wireless device 30. That is, if the terminal wireless device 30 monitors at least the call channel 110 and receives the control channel 120 when the call channel 110 is assigned a generation number and the generation number is the updated generation number. , It is possible to correspond to the update of the notification information.

<About the modified example in the above-described embodiment>
In the embodiments described above, the dimensions, shapes, relative arrangement relationships, conditions of implementation, etc. of the respective components may also be described, but these are examples in all aspects and are described in the present specification. It is not limited to what is stated in the document.

Therefore, innumerable variations and equivalents not exemplified are envisioned within the scope of the techniques disclosed herein. For example, when transforming, adding or omitting at least one component, or when extracting at least one component in at least one embodiment and combining it with the components of other embodiments. Shall be included.

In addition, as long as there is no contradiction, the components described as being provided with "one" in the above-described embodiment may be provided with "one or more".

Further, each component in the above-described embodiment is a conceptual unit, and within the scope of the technique disclosed in the present specification, one component is composed of a plurality of structures. And the case where one component corresponds to a part of a structure, and further, the case where a plurality of components are provided in one structure.

In addition, each component in the above-described embodiment shall include a structure having another structure or shape as long as it exhibits the same function.

In addition, the description in the present specification is referred to for all purposes relating to the present technology, and none of them is recognized as a prior art.

In addition, each component described in the above-described embodiment is assumed to be software or firmware and corresponding hardware, and in both concepts, each component is a "part". Or it is called a "processing circuit" or the like.

10 Headquarters equipment, 12 Communication control unit, 14 System management unit, 20, 21 Base station equipment, 22,26 Base station control unit, 24, 28, 32 radio unit, 30 terminal radio equipment, 32A transmission / reception switching unit, 32B transmission unit , 32C receiver, 32D antenna, 34 control unit, 34A modulation unit, 34B demodulation unit, 34C channel CODE unit, 34D channel DECODE unit, 34E monitoring control unit, 34F operation display unit, 34G audio processing unit, 34H audio interface unit, 100 generation number notification channel, 110 call channel, 120 control channel, 200, 210, 300 area, 1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007 radio frame group.

Claims (3)

It is a wireless communication system that performs press talk voice communication via a wireless communication frame having a call channel and a control channel.
A headquarters device for allocating the call channel and the control channel, a base station device for relaying the call channel from the headquarters device, and a terminal wireless device connected to the base station device via a wireless frame are provided. ,
The terminal wireless device is
Holds the generation number, which is a number that changes with the update of the broadcast information assigned to the control channel.
In the battery saving state, the call channel is intermittently received at each preset intermittent reception cycle.
The headquarters device
Manage the generation number of the notification information and
Allocate the broadcast information to the control channel,
When the wireless communication frame to be transmitted contains voice information, the voice information is assigned to the call channel in the wireless communication frame.
When the voice information is not included in the wireless communication frame to be transmitted, the generation number of the broadcast information is assigned to at least one of the communication channels in the wireless communication frame for each intermittent reception cycle.
The base station device is
The call channel from the headquarters device is relayed,
The terminal wireless device is
When the voice information is assigned to the call channel received in each intermittent reception cycle, voice processing is performed.
When the generation number of the broadcast information is assigned to the call channel received in each intermittent reception cycle, the generation number held by the terminal wireless device and the generation number assigned to the call channel are assigned. comparison, receives the generation number and the broadcast information and the generation number assigned to the traffic channel is allocated to the control channel and determines that differs to the terminal wireless device held,
In the wireless communication frame that is continuous with the wireless communication frame that includes the voice information and does not include the voice information, the generation number is assigned to the call channel regardless of the passage of the intermittent reception cycle.
Wireless communication system. A terminal wireless device connected to a base station device via a wireless frame in a wireless communication system that performs press talk voice communication via a wireless communication frame including a call channel and a control channel.
Holds the generation number, which is a number that changes with the update of the broadcast information assigned to the control channel.
In the battery saving state, the call channel is intermittently received at each preset intermittent reception cycle.
When voice information is assigned to the call channel received in each intermittent reception cycle, voice processing is performed.
When the generation number of the broadcast information is assigned to the call channel received in each intermittent reception cycle, the generation number held by the terminal wireless device and the generation number assigned to the call channel are assigned. comparison, receives the generation number and the broadcast information and the generation number assigned to the traffic channel is allocated to the control channel and determines that differs to the terminal wireless device held,
In the wireless communication frame that is continuous with the wireless communication frame that includes the voice information and does not include the voice information, the call channel to which the generation number is assigned is received regardless of the passage of the intermittent reception cycle.
The generation number held by the terminal wireless device is compared with the generation number assigned to the call channel, the generation number held by the terminal wireless device, and the generation number assigned to the call channel. Is determined to be different, the broadcast information assigned to the control channel is received.
Terminal wireless device. A headquarters device for allocating the call channel and the control channel in a wireless communication system that performs press talk voice communication via a wireless communication frame including a call channel and a control channel.
Broadcast information is assigned to the control channel,
It manages the generation number, which is a number that changes with the update of the notification information,
When the wireless communication frame to be transmitted contains voice information, the voice information is assigned to the call channel in the wireless communication frame.
When the voice information is not included in the wireless communication frame to be transmitted, the generation number of the broadcast information is sent to at least one of the communication channels in the wireless communication frame for each preset intermittent reception cycle. with dividing the,
In the wireless communication frame that is continuous with the wireless communication frame that includes the voice information and does not include the voice information, the generation number is assigned to the call channel of the wireless communication frame regardless of the passage of the intermittent reception cycle. ,
Headquarters equipment.

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