Radio base station device and radio communication method

Cross-reference to related applications

This application claims the priority interests of Japanese Patent Application No. 2008-217751 (filed on August 27, 2008) and Japanese Patent Application No. 2008-219919 (filed on August 28, 2008). The entire contents of the above shall be incorporated into the specification of the present application by reference.

The present invention relates to a wireless base station device and a wireless communication method of a wireless base station device that perform wireless communication with a plurality of wireless communication devices.

For example, in a wireless communication system consisting of a wireless base station device and a wireless communication device that employ a TDMA (Time Division Multiple Access) method, the frame is time-divisioned and a pair of time-division transmission time slots are used. , Wireless communication is performed using the reception time slot. The time slot is an example of a wireless resource. FIG. 9 shows an example of a TDMA communication frame configuration. By assigning each wireless communication device 300E that requests communication to a pair of time-divisioned transmission time slots and reception time slots, one wireless base station device and a plurality of wireless communication devices can be simultaneously connected to each other. It is possible to secure each channel.

In the above-mentioned wireless communication system, wireless communication is performed between the wireless base station device and the wireless communication device by occupying a channel (time slot in each communication frame) regardless of the content of the application used by the user. That is, it is not possible to increase the number of users that can be accommodated per base station. The above-mentioned wireless communication system is used for high-grade (ranked) users who have different user ranks due to contracts between users and telecommunications carriers and need to provide high-quality services such as less interruption of voice. In, the desired service cannot be provided because the time slot cannot be secured. As a method for solving such a problem, a wireless communication system in which a number of mobile stations larger than the number of slots per frame can be accessed at the same time has been proposed in the prior art (see Patent Document 1).

Further, in the above-mentioned wireless communication system, the amount of data that can be communicated in one time slot is limited. Therefore, in wireless communication that requires a large amount of data such as streaming, the data required for processing is appropriately received. Sometimes I couldn't. Therefore, a technique has been proposed in which the amount of data that can be transmitted and received is increased by performing wireless communication using a plurality of time slots in one frame (see Patent Document 2).

<p><patcit num="1"><text>Japanese Unexamined Patent Publication No. 9-172674</text></patcit><patcit num="2"><text>Japanese Unexamined Patent Publication No. 5-336061</text></patcit></p>

<p> However, Patent Document 1 does not describe a technique for appropriately allocating time slots when a user desires a predetermined communication rate in advance. For example, half-rate communication in which the frequency of time slot allocation for each user is half that of one user and communication is performed at half the normal transmission speed (full rate), and the frequency of time slot allocation is one user. When time slots are intermittently assigned to wireless communication devices in advance, such as quarter-rate communication, which is reduced to one-fourth of the case of, the combination of these communications is not considered. Therefore, there is a problem that the wireless resource cannot be used effectively.</p><p> Further, the technique described in Patent Document 2 can perform wireless communication using a plurality of time slots only when there is an empty time slot, and when there is no time slot that can be assigned, there is no time slot that can be assigned. Wireless communication using multiple time slots is not possible. Therefore, there is a problem that wireless communication that secures an appropriate amount of data according to the application to be used cannot be performed.</p><p> An object of the present invention is to consider the communication status of wireless communication devices in order to effectively use wireless resources when performing wireless communication with a plurality of wireless communication devices, and to make each communication frame relatively the same. It is an object of the present invention to provide a radio base station device and a radio communication method for assigning a plurality of radio communication devices to a radio resource at a position.</p><p> Another object of the present invention is to provide a wireless base station apparatus and a wireless communication method capable of performing wireless communication with an appropriate amount of data according to an application to be used even when there is no allottable wireless resource. To provide.</p>

<p><u style="single">The present invention</u>In a wireless base station device that executes wireless communication with a plurality of wireless communication devices, a first wireless resource allocation unit that allocates wireless resources included in a communication frame to the wireless communication device, and the first wireless communication device. When the wireless communication control unit that executes the wireless communication with the wireless communication device and the wireless communication control unit are executing the wireless communication with the wireless resource allocated by the wireless resource allocation unit, the current communication is performed. With respect to the wireless communication device inside, the wireless resource is to be intermittently released based on the communication status information acquisition unit that acquires information on the communication status and the information acquired by the communication status information acquisition unit. The wireless resources for the first wireless communication device detection unit that detects one wireless communication device and the first wireless communication device detected by the first wireless communication device detection unit are intermittently provided for each predetermined number of communication frames. A wireless resource allocation control unit that is specifically released, and a second wireless communication device detection unit that detects a second wireless communication device to which a wireless resource adjacent to the wireless resource released by the wireless resource allocation control unit is assigned. , Information indicating the communication type to the second wireless communication device detected by the second wireless communication device detection unit, and communication data amount information indicating the communication data amount of the second wireless communication device. A second wireless resource that allocates the released wireless resource to the second wireless communication device when the information acquisition unit and each of the information acquired by the communication information acquisition unit satisfy a predetermined condition. It has an allocation unit.</p><p> The case where the predetermined condition is satisfied is preferably at least the case where the communication type executes communication with a constant amount of communication data. Alternatively, the case where the predetermined condition is satisfied is at least the case where the communication type is a type that executes communication with a constant communication data amount, and the communication data amount of the second wireless communication device is constant. It is preferable that the amount of communication data is less than the amount of communication data.</p><p> The communication type that executes communication with the constant amount of communication data is preferably voice communication. Alternatively, the communication type that executes communication with the constant amount of communication data is preferably real-time broadcasting.</p><p><u style="single">The present invention</u>In the wireless communication method of a wireless base station device that executes wireless communication with a plurality of wireless communication devices, a step of allocating a wireless resource included in a communication frame to the wireless communication device and an allocated wireless resource , A step of executing the wireless communication with the wireless communication device, and a step of acquiring information on the communication status of the wireless communication device currently communicating when the wireless communication is being executed. Based on the acquired information on the communication status, the step of detecting the first wireless communication device to be the target for intermittently releasing the wireless resource, and the detected wireless resource for the first wireless communication device are provided. A step of intermittently releasing every predetermined number of communication frames, a step of detecting a second wireless communication device to which a wireless resource adjacent to the released wireless resource is assigned, and a second detected wireless communication device. The step of acquiring the information indicating the communication type to and the communication data amount information indicating the communication data amount of the second wireless communication device, and when each of the acquired information satisfies the predetermined conditions, the second Includes the step of allocating the open wireless resource to the wireless communication device of.</p>

<p> In the present invention, when wireless communication is performed with a plurality of wireless communication devices, a plurality of wireless devices are provided in wireless resources at relatively the same position in each communication frame in consideration of the communication status of the wireless communication devices. Since the communication device can be assigned, it can contribute to the effective use of wireless resources.</p><p> Further, the present invention limits the allocation of wireless resources of the wireless communication device when there is a wireless communication device having a good environment for wireless communication among the wireless communication devices currently in wireless communication, and the wireless communication device. Since the released wireless resources are allocated to other connected wireless communication devices while maintaining wireless communication with, the appropriate amount of data according to the application to be used in the other connected wireless communication devices. It is possible to perform wireless communication that secures.</p>

<figref num="1">It is a functional block diagram which shows the schematic structure of the radio base station apparatus by 1st Embodiment of this invention.</figref><figref num="2">It is a sequence diagram explaining the operation of a wireless base station apparatus and a wireless communication apparatus.</figref><figref num="3">It is a figure explaining the offset designation.</figref><figref num="4">It is a figure which shows the frame structure at the time of performing wireless communication using the time slot which was arranged intermittently in a wireless communication device.</figref><figref num="5">It is a block diagram which shows the schematic structure of the radio base station apparatus by the 2nd Embodiment of this invention.</figref><figref num="6">It is a sequence diagram explaining the operation of a wireless base station and a wireless communication device.</figref><figref num="7">It is a figure which shows the frame structure at the time of performing wireless communication using the time slot which was arranged intermittently in a wireless communication device.</figref><figref num="8">It is a figure which shows the frame structure when the wireless communication device performs wireless communication using the newly assigned intermittently arranged time slots.</figref><figref num="9">It is a figure which shows the frame structure.</figref>

Embodiments of the present invention will be described with reference to the drawings. (First Embodiment) FIG. 1 is a functional block diagram showing a schematic configuration of a radio base station apparatus according to the first embodiment of the present invention. The wireless base station device 100 shown in FIG. 1 executes wireless communication with a plurality of wireless communication devices by a time division multiple access method. The radio base station device 100 includes a control unit 110, a modulation / demodulation unit 112, a network interface 120 for connecting to the external network side, a memory 130 for storing a judgment threshold table, and a changeover switch (SW) for switching between transmission and reception. It has an RF unit 140. The control unit 110 includes a communication processing unit 111, a call control unit 113, a statistical processing unit (information acquisition unit) 114, and an intermittent arrangement determination unit (detection unit) 115.

The modulation / demodulation unit 112 modulates a transmission signal to a wireless communication device (not shown) and demodulates a reception signal from the wireless communication device. The call control unit 113 performs call control in order to establish a wireless link channel with the wireless communication device. The statistical processing unit 114 acquires information on the communication status of the wireless communication based on the wireless signal from the wireless communication device in the wireless communication in the time slot assigned by the communication processing unit 111. The intermittent arrangement determination unit 115 detects a wireless communication device that can intermittently allocate time slots for each predetermined number of communication frames based on the information acquired by the statistical processing unit 114.

The communication processing unit 111 includes a radio resource allocation unit 111A and a modulation method control unit 111B. The wireless resource allocation unit 111A allocates a time slot included in each communication frame to a plurality of wireless communication devices. Further, when the wireless resource allocation unit 111A transmits a wireless signal to the wireless communication device that intermittently allocates the time slot detected by the intermittent arrangement determination unit 115, the time allocated to the detected wireless communication device. Release the slots every predetermined frame. The modulation method control unit 111B decides to change the modulation method in the time slot for executing wireless communication to the wireless communication device to a modulation method having a larger number of modulation values than the current (before release) modulation method. .. Then, when the modulation method control unit 111B decides to change the modulation method, the modulation method control unit 111B instructs the modulation / demodulation unit 112 to change the modulation method. In response to the instruction from the modulation method control unit 111B, the modulation / demodulation unit 112 changes the modulation method in the time slot for executing wireless communication to the wireless communication device to a modulation method having a larger number of modulation values than the current modulation method. change. As a result, the wireless base station apparatus 100 can maintain the data rate required for wireless communication with the wireless communication apparatus. Further, the wireless resource allocation unit 111A receives a channel establishment request from the wireless communication device, the communication type (application type, user contract grade (user rank) type) of the wireless communication device, and the required data rate (full rate, half rate). , Quarter rate), etc.), and intermittently allocate time slots to wireless communication devices.

FIG. 2 is a sequence diagram illustrating the operation of the wireless base station device and the wireless communication device. First, the wireless communication device (mobile station) 300 transmits a signal (channel establishment request) requesting the wireless base station device 100 to establish a wireless link channel (step A11). This channel establishment request includes a communication rate required by the own terminal and a communication type such as a user rank. The user rank is determined by a contract between the user and the telecommunications carrier, for example, according to the fee paid by the user and the number of years of the contract. Users with a high user rank are provided with higher quality services such as uninterrupted voice. Based on the content of the communication type acquired from the wireless communication device 300, the wireless resource allocation unit 111A of the wireless base station device 100 intermittently interrupts the time slot at half rate for, for example, a wireless communication device that enables half-rate communication. For wireless communication devices that are assigned to and enable quarter-rate communication, time slots are intermittently assigned at quarter-rate (step S11). The radio resource allocation unit 111A allocates time slots at a normal rate (full rate) to wireless communication devices (non-applicable users) who should not allocate time slots intermittently. The call control unit 113 of the radio base station device 100 transmits the radio channel (time slot) allocation signal to the radio communication device 300 (step A12). Next, the radio base station device 100 and the radio communication device 300 transmit and receive a synchronous burst signal on the assigned channel (time slot) (step A13).

When the wireless base station device 100 receives the synchronous burst signal from the wireless communication device 300, the statistical processing unit 114 displays information on the communication status of the wireless communication, for example, reception power, fading speed, frequency deviation, etc. of the received synchronous burst signal. Acquire information and perform statistical processing. The intermittent arrangement determination unit 115 compares the information acquired by the statistical processing unit 114 with the determination threshold value stored in the memory 130, and the wireless communication device 300 can intermittently allocate time slots. It is determined whether or not it is. That is, the intermittent arrangement determination unit 115 detects the wireless communication device to which the time slot (radio resource) is allocated for each predetermined number of communication frames. Further, the intermittent arrangement determination unit 115 determines the user rank of the wireless communication device 300 (step S12). If it is determined in step S12 that the wireless communication device is not capable of intermittently assigning time slots, the wireless base station device 100 continues communication at the normal rate. If it is determined in step S12 that the wireless communication device is capable of intermittently assigning time slots, the intermittent arrangement determination unit 115 further determines that the wireless communication device is in wireless communication with the wireless base station device 100. In, it is determined whether or not there is a wireless communication device that is already intermittently assigned a time slot and is communicating (step S13). That is, the intermittent arrangement determination unit 115 determines whether or not there is an intermittent arrangement user who performs half-rate communication or quarter-rate communication. If it is determined in step S13 that no user has already been intermittently assigned a time slot, the radio resource allocation unit 111A determines in step S12 that the time slot can be allocated intermittently. The same time slot is intermittently assigned to the device. That is, the radio resource allocation unit 111A allocates time slots, which are relatively at the same position in each communication frame, to the plurality of radio communication devices in order.

If it is determined in step S13 that there is a wireless communication device that has already been intermittently assigned a time slot for communication, the wireless resource allocation unit 111A allocates the time slot intermittently in step S12. By allocating the wireless communication device determined to be possible intermittently, the vacant time slot is allocated intermittently. After that, the call control unit 113 instructs the target wireless communication device 300 to switch the channel to the time slot (intermittent arrangement time slot) already intermittently assigned (step A15). Next, the wireless base station apparatus 100 and the wireless communication apparatus 300 transmit and receive synchronous burst signals in intermittently arranged time slots (step A16). Then, the radio base station apparatus 100 determines whether or not it is possible to maintain the state in which the time slots are intermittently arranged. If it is determined that the time slots can be maintained in the intermittently arranged state, the radio base station apparatus 100 and the wireless communication apparatus 300 start communication in the intermittently arranged time slots (step A17). .. The statistical processing unit 114 continues to calculate the burst correlation as to whether or not the time slots can be arranged intermittently. Here, the specification of the time slot to be intermittently arranged will be described with reference to FIG. The radio resource allocation unit 111A should be used for a wireless communication device by designating, for example, the number of frames offset from the reference frame including the reference time slot and the time slot number in the frame with reference to the first time slot of the super frame. Indicate the time slot.

FIG. 4 is a diagram showing a frame configuration when the wireless communication devices 300A and 300B perform wireless communication using intermittently arranged time slots. FIG. 4 shows a case of two multiplex, in which two wireless communication devices perform wireless communication using the same time slot every other frame. According to the present invention, when the wireless communication device 300A performs wireless communication using the intermittently arranged time slots and there is a time slot that can be assigned to another wireless communication device, the time slot is newly added. Can be assigned to another wireless communication device 300B that requires communication with the wireless base station device 100. Further, it is preferable that the wireless communication device to which the same time slot is assigned is a wireless communication device having the same user rank and application (communication type). In this way, the wireless base station apparatus can simplify the control when switching the wireless communication apparatus in the same time slot.

In the above-described embodiment, the time slots are intermittently arranged every other frame, but the present invention is not limited to one frame, and the time slots are intermittently arranged every several frames. You may. Further, the number of wireless communication devices using the same time slot may be two or more.

When the intermittent arrangement determination unit 115 determines in step A15 that the environment for wireless communication is good and the communication state is good enough to set a high-rate modulation class (modulation method). It is preferable to notify the radio resource allocation unit 111A of the determination of the intermittent arrangement timing of the time slot of the wireless communication device and notify the modulation method control unit 111B of the determination of the modulation class change. .. In this way, the wireless communication device can suppress the deterioration of the wireless communication quality due to the reduction of the time slots used. The intermittent arrangement determination unit 115 identifies the communication type of the wireless communication device based on the signal output from the modulation / demodulation unit 112 when the channel establishment request is made from the wireless communication device, and the identified communication type. However, it is a specific communication type such as VoIP (Voice over Internet Protocol), which is a fixed rate communication, and real-time communication, and the time for a wireless communication device that determines that the value related to the communication status of wireless communication exceeds the judgment threshold. The radio resource allocation unit 111A may be notified to determine the intermittent arrangement of the slots.

As described above, according to the first embodiment of the present invention, when there is a time slot that can be assigned to another wireless communication device, the time slot is newly and intermittently assigned to the wireless base station device. It can be assigned to a wireless communication device that communicates in the specified time slot. Further, according to the first embodiment of the present invention, among the wireless communication devices currently in wireless communication, when the environment for wireless communication is good and there is a wireless communication device capable of setting a high-rate modulation method, After resetting the modulation class of the wireless communication device to the high-rate modulation method, by limiting the allocation of time slots, the appropriate amount of data according to the application to be used in other connected wireless communication devices. It is possible to perform wireless communication that secures the above. Further, according to the first embodiment of the present invention, the modulation class of a wireless communication device performing wireless communication at a fixed rate such as VoIP or real-time communication is reset to a high-rate modulation method. Even in a wireless communication device, it is possible to perform wireless communication with an appropriate amount of data according to the application to be used.

(Second embodiment) Next, a second embodiment of the present invention will be described. FIG. 5 is a functional block diagram showing a schematic configuration of a radio base station apparatus according to a second embodiment of the present invention. The radio base station apparatus 200 shown in FIG. 5 includes an RF unit 240 including a changeover switch (SW) for switching transmission / reception, a control unit 210, a modulation / demodulation unit 212, a memory 230 for storing a judgment threshold table, and an external network side. It is equipped with a network interface 220 for connecting to. The control unit 210 includes a communication processing unit 211, a call control unit 213, a statistical processing unit 214, and an intermittent arrangement determination unit 215. The communication processing unit 211 includes a radio communication control unit 301, a radio resource allocation unit 302, an open radio resource allocation unit 303, and a radio resource allocation control unit 304. The statistical processing unit 214 includes a communication status information acquisition unit 305 and a communication information acquisition unit 306. The intermittent arrangement determination unit 215 includes a wireless communication device detection unit 307 and an adjacent wireless communication device detection unit 308.

The modulation / demodulation unit 212 modulates a transmission signal to a wireless communication device (not shown) and demodulates a reception signal from the wireless communication device. The call control unit 213 performs call control to establish a wireless link channel with the wireless communication device.

The radio resource allocation unit 302 (first radio resource allocation unit) allocates a time slot included in the communication frame to the radio communication device. The wireless communication control unit 301 executes wireless communication with the wireless communication device in the time slot assigned by the wireless resource allocation unit 302. When performing wireless communication, the communication status information acquisition unit 305 acquires information on the communication status such as received power, fading speed, and frequency deviation of the wireless communication device currently communicating. The wireless communication device detection unit 307 (first wireless communication device detection unit) intermittently shifts the time slot based on the information acquired by the communication status information acquisition unit 305 and the determination threshold table stored in the memory 230. Detect the first wireless communication device to be released. The wireless resource allocation control unit 304 intermittently opens the time slot for the first wireless communication device detected by the wireless communication device detection unit 307 every predetermined number of communication frames. As a result, the radio base station device can allocate the open time slot to the other connected wireless communication device wireless communication device to which the time slot adjacent to the opened time slot is assigned.

When the time slot for the first wireless communication device is intermittently opened, the wireless communication control unit 301 transmits a wireless signal to the first wireless communication device detected by the wireless communication device detection unit 307. In this case, it may be decided to change the modulation method for executing wireless communication in the unopened time slot to a modulation method having a larger number of modulation values than the current modulation method. In this case, when the wireless communication control unit 301 decides to change the modulation method, the wireless communication control unit 301 instructs the modulation / demodulation unit 212 to change the modulation method. Then, the modulation / demodulation unit 212 changes the modulation method for executing wireless communication in the unopened time slot according to the instruction from the wireless communication control unit 301 to a modulation method having a larger number of modulation values than the current modulation method. To do. As a result, the radio base station device maintains the data rate required for wireless communication with the first radio communication device, while the other connected time slot is assigned to be adjacent to the open time slot. Wireless communication device An open time slot can be assigned to a wireless communication device.

The adjacent wireless communication device detection unit 308 (second wireless communication device detection unit) detects a second wireless communication device to which a time slot adjacent to the time slot opened by the wireless resource allocation control unit 304 is assigned. The communication information acquisition unit 306 indicates information indicating the communication type to the second wireless communication device detected by the adjacent wireless communication device detection unit 308, and communication data amount information indicating the amount of communication data of the second wireless communication device. To get. The open radio resource allocation unit 303 (second radio resource allocation unit) is opened to the second radio communication device when each information acquired by the communication information acquisition unit 306 satisfies a predetermined condition. Allocate a time slot.

FIG. 6 is a sequence diagram illustrating the operation of the wireless base station device and the wireless communication device. In FIG. 6, it is assumed that the wireless base station device 200 and the wireless communication device (mobile station) 300D are in communication. When the wireless communication device (mobile station) 300C transmits a signal requesting the establishment of the wireless link channel to the wireless base station device 200 (step B11), the call control unit 213 of the wireless base station device 200 sends the wireless channel (time slot). The assigned signal of is transmitted to the wireless communication device 300C (step B12). Next, the radio base station device 200 and the radio communication device 300C transmit and receive a synchronous burst signal on the assigned channel (time slot) (step B13).

When the wireless base station device 200 receives the synchronous burst signal from the wireless communication device 300C, the communication status information acquisition unit 305 of the statistical processing unit 214 determines the value related to the communication status of the wireless communication, for example, the reception power of the reception synchronous burst signal. Information such as fading speed and frequency deviation (communication status information) is acquired and statistical processing is performed. The wireless communication device detection unit 307 compares the value acquired by the communication status information acquisition unit 305 with the determination threshold value stored in the memory 230, and the wireless communication device 300C determines a high-rate modulation class (modulation method). Determine if it is a wireless communication device that can be set. The wireless communication device detection unit 307 is a wireless communication device in which the environment for wireless communication is good and the value related to the communication status of the wireless communication is in a good communication state so that a high-rate modulation class (modulation method) can be set. If it is determined, the communication processing unit 211 is notified that the intermittent arrangement timing of the time slot of the wireless communication device 300C is determined and that the modulation class is changed (step T11).

Upon receiving the notification of the intermittent arrangement timing, the wireless resource allocation control unit 304 of the communication processing unit 211 decides to open the time slots assigned to the wireless communication device 300C every predetermined number of frames. The wireless communication control unit 301 transmits a channel switching (intermittent arrangement) instruction signal to the wireless communication device 300C (step B15). Further, the wireless communication control unit 301 decides to change the modulation method for executing wireless communication in an unopened time slot to a modulation class (modulation method) having a larger number of modulation values than the current modulation method. Then, the modulation class instruction signal is transmitted to the wireless communication device 300C, and the modulation / demodulation unit 212 is notified.

Next, the wireless base station device 200 and the wireless communication device 300C transmit and receive synchronous burst signals in the intermittently arranged time slots, and the wireless base station device 200 maintains communication in the intermittently arranged time slots. Is possible (step B16). If the time slots can be arranged intermittently, the radio base station apparatus 200 and the wireless communication apparatus 300C start communication in the intermittently arranged time slots (step B17).

Next, the adjacent wireless communication device detection unit 308 of the wireless base station device 200 detects the wireless communication device 300D to which the time slot adjacent to the time slot opened by the wireless resource allocation control unit 304 is assigned. As communication information, the communication information acquisition unit 306 provides information indicating the communication type to the wireless communication device 300D detected by the adjacent wireless communication device detection unit 308 and communication data amount information indicating the communication data amount of the wireless communication device 300D. get. The open wireless resource allocation unit 303 performs wireless communication when each information acquired by the communication information acquisition unit 306 is a communication type that executes communication with a certain amount of communication data such as voice communication (VoIP) and real-time broadcasting. Allocate an open time slot for device 300D (step B18). Alternatively, the open wireless resource allocation unit 303 is in the case where each information acquired by the communication information acquisition unit 306 is a communication type that executes communication with a certain amount of communication data, and the communication data of the wireless communication device 300D. When the amount is less than the constant amount of communication data, an open time slot may be assigned to the wireless communication device 300D. After that, the wireless base station device 200 and the wireless communication device 300D perform wireless communication using the time slot used by the wireless communication device 300D and the open time slot (intermittently arranged time slot) ( Step B19).

FIG. 7 is a diagram showing a frame configuration when the wireless communication device 300C is performing wireless communication using the time slots arranged intermittently. FIG. 7 shows that the wireless communication device 300C performs wireless communication using a time slot every other frame, and there is a time slot that can be assigned every other frame. By intermittently arranging in this way, an assignable time slot is created, so that the radio base station device can be set at a predetermined interval with respect to the other wireless communication device in addition to the time slot used by the other wireless communication device. You can assign an open time slot for each.

FIG. 8 shows the frame configuration when the wireless communication device 300D performs wireless communication using the time slot assigned to the wireless communication device 300D and the newly assigned intermittently arranged time slot. It is a figure. In this way, since the wireless communication device 300D can also use the newly opened intermittently arranged time slots, it is possible to perform wireless communication with an appropriate amount of data according to the application to be used.

Since the time slot assigned to the wireless communication device 300D and the newly assigned intermittently arranged time slot are adjacent to each other, the wireless base station device should connect the two adjacent time slots. You can do it. When the two time slots are connected, the preamble portion of the transmission / reception signal is reduced by one, so that the wireless communication device 300D can increase the amount of data that can be transmitted / received by the reduction of one. Further, in the above-described embodiment, the time slots that are intermittently arranged every other frame are shown, but the present invention is not limited to one frame, and may be intermittently arranged every several frames. ..

As described above, according to the second embodiment of the present invention, when there is a wireless communication device currently in wireless communication in which the environment for performing wireless communication is good, the time of the wireless communication device is used. By limiting the slot allocation, while maintaining wireless communication with the wireless communication device, the open time slot is assigned to the other wireless communication device connected, so that the other wireless communication device connected. In the above, it is possible to perform wireless communication with an appropriate amount of data according to the application to be used. Further, according to the second embodiment of the present invention, when a constant communication rate cannot be secured, an adjacent time slot is connected and assigned to another connected wireless communication device, so that the other connected wireless communication device is assigned. In a wireless communication device, it is possible to perform wireless communication with an appropriate amount of data according to the application to be used.

In the description of the above-described embodiment, a wireless base station device that executes wireless communication with a plurality of wireless communication devices by a time division multiple access method is described, but the present invention describes the plurality of wireless communication devices. It can also be realized in a wireless base station apparatus that executes wireless communication with and by a frequency division multiple access method. That is, in the above-described embodiment, the time slot is used as the wireless resource, but if the wireless base station device executes wireless communication by the frequency division multiple access method, the subcarrier or the resource block is targeted as the wireless resource. It is also possible.

Although the present invention has been described as an apparatus in the above-described embodiment, the present invention can also be realized as a storage medium in which a communication method, a program, and a program substantially corresponding thereto are recorded, and the present invention can be realized. It should be understood that the scope also includes these. In addition, each step of these communication methods and programs uses arithmetic processing devices such as CPU and DSP as necessary in data processing, and the input data and processed / generated data are stored in the HDD. , It is stored in a storage device such as a memory.

Further, although the present invention has been described based on various drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. Therefore, it should be noted that these modifications and modifications are included in the scope of the present invention. For example, the functions included in each means and each step can be rearranged so as not to be logically inconsistent, and a plurality of means and steps can be combined or divided into one. ..