JP2020043449A - Base station device performing radio resource allocation for terminal communicating by using a half duplex system, control method and program thereof - Google Patents

Abstract

To communicate efficiently with a terminal using a half duplex system.SOLUTION: A base station device detects such a state that a signal must be transmitted from a terminal to the own device, and on the basis of detection, allocates radio resources for transmitting a signal to the own device, to the terminal. If a data signal that must be transmitted to the terminal but not transmitted yet does not exist when the state is detected, the base station device puts off allocation of the radio resources until that data signal is generated, and when the data signal is generated during a prescribed period after that state is detected, allocates the radio resources to the terminal so that a state where the terminal receives the signal from the own device is not brought about, while transmission of a response signal from the terminal when the data signal is transmitted to the terminal, and transmission of a signal from the terminal based on detection of the above mentioned state are carried out.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a radio resource allocation technique for a terminal device that performs communication using a half-duplex scheme.

  In the Third Generation Partnership Project (3GPP), it has been determined that a terminal device supports a half-duplex scheme in which transmission and reception are temporally switched and executed (Non-Patent Document 1).

3GPP TS36.300 V13.4.0, June 2016

  When the half-duplex method is used, a guard time occurs when switching between transmission and reception, and when transmission and reception are frequently switched, a problem is that the period during which the terminal device performing the switching can communicate is reduced. was there.

  The present invention has been made in view of such a problem, and provides a technology that enables efficient communication using a half-duplex method.

  A base station apparatus according to an aspect of the present invention includes: a detecting unit configured to detect that a signal is to be transmitted from a terminal apparatus to the base station apparatus; and the terminal apparatus based on the detection of the state. Allocating means for allocating a radio resource for transmitting a signal to the base station apparatus, and the allocating means should transmit to the terminal apparatus when the state is detected. If there is no data signal that has not been transmitted yet, postpone the allocation of the radio resources until the data signal occurs, if the data signal occurs during a predetermined period after the state is detected, Transmission of a response signal from the terminal device when the data signal is transmitted to the terminal device and transmission of a signal from the terminal device based on detection of the state are performed. During that, the so as not to terminal device in a state for receiving signals from the base station apparatus allocates the radio resource to the terminal device, and wherein the.

  Further, a base station apparatus according to another aspect of the present invention has a detection unit for detecting occurrence of a data signal to be transmitted to a terminal apparatus, and a signal may be transmitted from the terminal apparatus to the base station apparatus. Specifying means for specifying a first time period; and determining to determine a timing for transmitting the data signal when the occurrence of the data signal is detected before a predetermined timing determined based on the first time period. Means, wherein the terminal device transmits a signal from the base station device during a period between the second period in which a response signal is transmitted from the terminal device to the data signal and the first period. There is a determining means for determining the timing so as not to be in a receiving state, and a transmitting means for transmitting the data signal at the timing.

  According to the present invention, efficient communication can be performed with a terminal device using the half-duplex system.

FIG. 2 is a diagram illustrating a configuration example of a wireless communication system. FIG. 3 is a diagram schematically illustrating wireless resource allocation according to the present embodiment. FIG. 3 is a diagram illustrating an example of a hardware configuration of a base station device. FIG. 3 is a diagram illustrating a functional configuration example of a base station device. FIG. 9 is a diagram illustrating an example of a flow of a process executed by the base station device. FIG. 9 is a diagram illustrating an example of a flow of a process executed by the base station device.

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

(System configuration)
FIG. 1 shows a configuration example of a wireless communication system according to the present embodiment. The wireless communication system includes, for example, a base station device 101 and a terminal device 102. Although FIG. 1 illustrates an example including one base station device 101 and one terminal device 102 for simplicity of description, a wireless communication system is configured to have many It may include a base station device 101 and a number of terminal devices 102.

  This wireless communication system is assumed to be operable in accordance with, for example, the LTE (Long Term Evolution) standard specified by 3GPP, and as an example, it is assumed that MTC (Machine Type Communication) can be used. In the following description, technical terms in MTC will be used, but the following discussion is not intended only for MTC, and the following discussion can be applied to any other system.

  The terminal device 102 adopts a half-duplex system, and performs communication on a downlink (a wireless link in a direction from the base station device 101 to the terminal device 102) and an uplink (a wireless link in a direction from the terminal device 102 to the base station device 101). And communication with each other in time. In other words, uplink communication is not performed during downlink communication, and downlink communication is not performed during uplink communication.

  In the half-duplex method, a guard time during which communication is not performed when switching between downlink and uplink communication occurs. Therefore, when communication between the downlink and the uplink is frequently switched, a period during which communication using the guard time cannot be performed occurs in the terminal device 102, and communication efficiency may be degraded. For example, in downlink communication, after a control signal for downlink radio resource allocation and transmission of a data signal are performed on the downlink, a response signal to the data signal is transmitted on the uplink. . At the time of uplink communication, a control signal for uplink radio resource allocation is transmitted on the downlink, and thereafter, a data signal is transmitted on the uplink. Assuming that these operations are performed once, once during transmission of the data signal on the downlink, once after transmission of the data signal on the downlink and before transmission of the data signal on the uplink, once on the uplink. Since the up / down switching is performed three times during the transmission of the data signal, it is necessary to insert a guard time according to the switching. As described above, when switching between uplink and downlink occurs every time communication is performed, a period during which the terminal device 102 cannot perform communication frequently occurs, and the communication efficiency of the terminal device 102 may be degraded.

  In the present embodiment, the base station apparatus 101 controls the allocation timing of the radio resources in order to suppress such deterioration in communication efficiency. For example, when the base station apparatus 101 detects that the terminal apparatus 102 is in a state to transmit the first uplink signal to the base station apparatus 101, the base station apparatus 101 should transmit to the terminal apparatus 102 and transmit untransmitted downlink signals. Wait for the second signal of the link to occur. Here, the first signal may be, for example, a data signal for transmitting user data or a control signal for transmitting control information or the like in the system. The second signal is a data signal, and may be a control signal including information for predetermined control in some cases. In the following description, the second signal is, for example, a signal such that a response signal to the signal is transmitted from the terminal device 102, and the second signal is a signal such as a signal for radio resource allocation. Is not included. In response to the generation of the second signal during the predetermined period, the base station apparatus 101 transmits the response signal (ACK / NACK) from the terminal apparatus 102 when transmitting the second signal. Accordingly, for example, the wireless resource is allocated to the terminal device 102 such that the first signal is transmitted at the same timing as the timing. Note that the base station apparatus 101 does not enter a state in which the terminal apparatus 102 receives a signal from the base station apparatus 101 between the transmission of the response signal to the second signal and the transmission of the first signal. It suffices to allocate radio resources in this way, and it is not necessary to allocate radio resources of the same subframe to the response signal and the first signal. For example, the base station apparatus 101 performs radio communication so that the interval between the transmission period of the response signal to the second signal and the transmission period of the first signal does not become larger than a predetermined number (for example, one) of subframes. Resource allocation can be performed. According to this, the transmission of the response signal to the downlink data signal and the transmission of the uplink data signal are performed collectively in one period in which the downlink communication is not performed. No guard time is generated. For this reason, it is possible to reduce deterioration of the communication efficiency of the terminal device 102.

  This is shown in FIG. In FIG. 2, it is assumed that each signal is repeatedly transmitted twice. However, this repeated transmission is an example, and the repeated transmission may not be performed, or the number of repetitions may be more than two.

  FIG. 2A shows conventional radio resource allocation. In the case of FIG. 2A, when the base station device 101 detects the occurrence of the first signal to be transmitted on the uplink (for example, in response to a scheduling request), the terminal device 102 can receive the downlink signal. And transmits a control signal (MPDCCH) for allocating radio resources for transmission of the first signal. MPDCCH is an acronym of MTC (Machine Type Communication) Physical Downlink Control Channel. Thereafter, the base station device 101 receives the first signal (PUSCH) from the terminal device 102 in the radio resources allocated to the terminal device 102. PUSCH is an acronym of Physical Uplink Shared Channel. Here, it is assumed that the base station apparatus 101 generates a second downlink signal between transmission of the MPDCCH and reception of the PUSCH. In this case, the base station apparatus 101 transmits the second signal to the terminal apparatus 102 after the terminal apparatus 102 has finished transmitting the uplink signal and can receive the downlink signal. A control signal (MPDCCH) indicating allocation of downlink radio resources for is transmitted. Then, the base station apparatus 101 transmits the second downlink signal (PDSCH) in the radio resource indicated by the MPDCCH. Here, PDSCH is an acronym of Physical Downlink Shared Channel. Thereafter, the base station apparatus 101 receives a response signal (ACK / NACK) of HARQ (Hybrid Automatic Repeat reQuest) from the terminal apparatus 102 after a predetermined frame. This response signal is transmitted by PUCCH (Physical Uplink Control Channel). In the example of FIG. 2A, (1) between a scheduling request (uplink) and MPDCCH (downlink), (2) between MPDCCH (downlink) and PUSCH (uplink), (3) PUSCH (uplink) and MPDCCH Switching between uplink and downlink is performed four times between (downlink) and (4) PDSCH (downlink) and PUCCH (uplink).

  FIG. 2B illustrates allocation of radio resources according to the present embodiment. In the case of FIG. 2B, when the base station apparatus 101 detects the occurrence of the first signal to be transmitted on the uplink, the base station apparatus 101 waits until the predetermined period expires or the generation of the second downlink signal. Postpones the allocation of radio resources. Then, when the second signal is generated, the base station apparatus 101 determines the transmission timing of the first MPDCCH for allocating the downlink radio resource and the transmission timing of the second MPDCCH for allocating the uplink radio resource. Is adjusted so that the uplink first signal and the response signal to the downlink second signal are transmitted together at the same timing. By doing so, for example, in the case of FIG. 2A, the number of times of switching between downlink communication and uplink communication is four, whereas in the case of FIG. , Twice (between the scheduling request and the first MPDCCH, between the PDSCH / second MPDCCH and the PUSCH). For this reason, the occurrence of guard time can be reduced, and deterioration in communication efficiency can be suppressed.

  In 3GPP, when a HARQ response (ACK / NACK) is returned to the terminal device 102 at the timing when the radio resource for the PUSCH is allocated, the response is included in the PUSCH and transmitted. I have. For this reason, in the example of FIG. 2B, the terminal device 102 transmits the first signal and the HARQ response in one PUSCH, so that the amount of radio resources to be used can be suppressed. Note that FIG. 2B is an example, and the transmission timing of each signal is not limited to the example in FIG. For example, the terminal device 102 is in a state of receiving a signal from the base station device 101 between the transmission of the first uplink signal and the transmission of the ACK / NACK for the second downlink signal. If there is no wireless resource allocation, it is possible to suppress the occurrence of guard time and improve the communication efficiency of the terminal device 102. For example, the base station apparatus 101 assigns the radio resources so that the transmission period of the first signal and the transmission period of the response signal to the second signal are continuous or only a part of the transmission period is overlapped. Can do it.

  In the example of FIG. 2, the base station apparatus 101 detects the occurrence of the first signal to be transmitted from the terminal apparatus 102 in response to the scheduling request, but the present invention is not limited to this. For example, the base station apparatus 101 may know in advance that transmission target data is generated in the terminal apparatus 102 at a constant cycle. In this case, the base station apparatus 101 can specify the timing at which the transmission target data occurs based on the cycle. Further, the occurrence of the first signal to be transmitted in the terminal device 102 may be detected by another method.

  If the base station apparatus 101 does not generate the downlink second signal within a predetermined period after detecting the generation of the uplink first signal, the base station apparatus 101 performs the second generation of the downlink second signal. Radio resources for transmission of the first signal can be allocated without waiting for generation of the signal. The predetermined period can be set according to, for example, an allowable delay time in communication of the first signal. That is, the base station apparatus 101 allocates the radio resources to the first signal within the predetermined period, so that the predetermined period is set so that the communication of the first signal is completed within the allowable delay time. At this time, for example, when the first signal is generated by an application that requires real-time properties, the allowable delay time is shortened, and the predetermined period is also shortened. Further, in VoLTE (Voice over LTE) or the like, a predetermined period is set so that a radio resource is allocated within an allowable delay time of 20 to 40 milliseconds, which is a packet generation interval. Further, when the first signal is a best effort data signal, the predetermined period may be set longer.

  Further, in the above example, the base station apparatus 101 waits for the generation of the downlink second signal after detecting the generation of the uplink first signal, but these may be reversed. . That is, when the generation of the first signal of the uplink is not detected at the time when the second signal of the downlink is generated, the base station apparatus 101 may wait for the generation of the first signal. Good. Also in this case, radio resource allocation is performed such that the terminal device 102 does not enter a state in which the terminal device 102 can receive a signal from the base station device 101 between transmission of the first signal and transmission of a response signal to the second signal. Becomes possible.

  In the LTE standard, the terminal device 102 may transmit the scheduling request only at a predetermined timing set in advance. For this reason, the base station apparatus 101 transmits the response signal to the downlink signal at the predetermined timing when there is a possibility that the scheduling request is transmitted from the terminal apparatus 102 so that the response signal to the downlink signal is transmitted from the terminal apparatus 102. May be allocated for the purpose. Further, the terminal device 102 measures a radio channel and periodically reports channel quality information (CQI). For this reason, the base station apparatus 101 may allocate the radio resources for the downlink signal so that the response signal to the downlink signal is transmitted from the terminal apparatus 102 at the timing of the periodic CQI report. . In addition, the base station apparatus 101 can perform semi-persistent scheduling for periodically allocating a fixed radio resource to the terminal apparatus 102 in which transmission target data such as VoLTE periodically occurs. For this reason, the base station apparatus 101 transmits a downlink signal to the terminal apparatus 102 to be subjected to semi-persistent scheduling at a timing that can be specified according to a cycle in which radio resources are allocated to the terminal apparatus 102. May be allocated such that a response signal to the signal is transmitted from the terminal device 102. A period during which a scheduling request or a CQI report may be transmitted or a first period during which radio resources are allocated by semi-persistent scheduling, and a second period during which a response signal to a downlink signal is transmitted This means that at least a part thereof may or may not overlap, but at least during these two periods, the terminal device 102 is in a state of receiving a signal from the base station device 101. Are set so as to be temporally close to each other. For example, radio resource allocation for a downlink signal may be performed so that a period between the first period and the second period does not become longer than one subframe.

  As described above, the base station apparatus 101 transmits the first period during which a signal may be transmitted from the terminal apparatus 102 (for example, a subframe in which transmission of a scheduling request is permitted, a subframe in which periodic CQI reporting is performed). , A subframe to which radio resources are allocated by semi-persistent scheduling), and ACK / NACK can be returned in the first period, or a first period and a second period for returning ACK / NACK It is possible to determine the timing of transmitting the second downlink signal so that the terminal device 102 does not receive the signal from the base station device 101 between the terminal device 102 and the terminal device 102 and perform radio resource allocation according to the timing. According to this, switching for performing downlink communication is performed between the timing at which the terminal device 102 transmits a scheduling request, a CQI report, and the like, and the timing at which a response signal to a downlink data signal is transmitted. The guard time can be reduced.

(Device configuration)
Next, an example of a hardware configuration of the base station apparatus 101 that executes the above-described processing will be described with reference to FIG. The base station apparatus 101 includes, for example, a processor 301, a ROM 302, a RAM 303, a storage device 304, and a communication circuit 305. The processor 301 is a computer including one or more processing circuits, such as a general-purpose CPU (central processing unit) and an ASIC (application-specific integrated circuit), and is stored in the ROM 302 or the storage device 304. By reading and executing the stored program, the entire process of the base station apparatus 101 and the above-described processes are executed. The ROM 302 is a read-only memory that stores a program related to processing executed by the base station device 101 and information such as various parameters. The RAM 303 functions as a work space when the processor 301 executes a program, and is a random access memory that stores temporary information. The storage device 304 includes, for example, a removable external storage device or the like. The communication circuit 305 is configured by a circuit for wired communication or wireless communication, for example. The base station apparatus 101 includes, for example, a baseband circuit for MTC, an RF circuit, and the like, and an antenna as a communication circuit 305 for communication with the terminal apparatus 102. Further, the communication circuit 305 of the base station device 101 may include, for example, a circuit for performing (wired or wireless) communication with another base station device or a network node. Although one communication circuit 305 is illustrated in FIG. 3, the base station device 101 may include a plurality of communication circuits.

  FIG. 4 illustrates a functional configuration example of the base station apparatus 101. The base station apparatus 101 includes, for example, a communication unit 401 and a communication control unit 402. The communication control unit 402 includes, for example, a detection unit 403 and a resource allocation unit 404.

  The communication unit 401 is a functional unit for performing communication with the terminal device 102. The communication control unit 402 controls communication by the communication unit 401. For example, the communication control unit 402 transmits a signal (MPDCCH) for allocating an uplink radio resource to the terminal device 102 in response to detecting that the terminal device 102 is in a state to transmit a signal to the base station device 101. The communication unit 401 is controlled so as to be transmitted to the device 102. Then, the communication control unit 402 controls the communication unit 401 so as to receive a wireless signal from the terminal device 102 by using the allocated wireless resource. Further, the communication control unit 402 transmits a signal (MPDCCH) for allocating downlink radio resources to the terminal device 102 to the terminal device 102 when a signal is to be transmitted from the base station device 101 to the terminal device 102. The communication unit 401 is controlled. Then, the communication control unit 402 controls the communication unit 401 to transmit a radio signal to the terminal device 102 using the allocated radio resource.

  The detecting unit 403 detects that an uplink signal to be transmitted from the terminal device 102 to the base station device 101 has occurred (occurs). For example, when the scheduling request from the terminal device 102 is received by the communication unit 401, or when the terminal device 102 transmits a signal periodically, for example, the detection unit 403 determines the timing at which the signal should be transmitted according to the cycle. When the time until arrival reaches a predetermined value, the terminal device 102 can detect that an uplink signal to be transmitted to the base station device 101 has occurred (occurs). Note that it may be detected that the terminal device 102 is in a state to transmit a signal by another method. The detection unit 403 detects that a signal to be transmitted to the terminal device 102 has occurred, for example, by monitoring whether data is stored in a buffer addressed to the terminal device 102.

  Resource allocating section 404 allocates wireless resources to terminal apparatus 102 according to the detection result by detecting section 403. When it is detected that an uplink signal has been generated, the resource allocating unit 404 delays radio resource allocation for the uplink signal until an untransmitted signal to be transmitted on the downlink is generated. I do. Then, the resource allocating unit 404 determines that at least a part of the transmission period of the response signal to the downlink signal and the transmission period of the uplink signal overlap, or the length of the period between these two transmission periods. The transmission timing of the first MPDCCH for allocating the downlink radio resource and the transmission timing of the second MPDCCH for allocating the uplink radio resource are determined so that is equal to or less than a sufficiently small predetermined value. Then, resource allocating section 404 transmits the first MPDCCH and the second MPDCCH at the respectively determined timing, transmits a downlink signal to terminal apparatus 102 at a timing corresponding thereto, and transmits terminal signal 102 on the uplink. The communication unit 401 is controlled so as to receive a response signal to a downlink signal and an uplink signal. Note that, when detecting the occurrence of an uplink signal, if the unallocated signal to be transmitted on the downlink already exists, the resource allocating unit 404 determines whether the signal has been transmitted before the response signal transmission timing for that signal. Control may be performed to allocate uplink radio resources. That is, the base station apparatus 101 performs control for radio resource allocation for the generated uplink signal before the terminal apparatus 102 transitions from the state of performing downlink communication to the state of performing uplink communication. A signal may be transmitted to terminal device 102. For example, when a downlink untransmitted signal already exists and the MPDCCH related to resource allocation for the signal has already been transmitted, the base station apparatus 101 transmits the uplink signal together with the downlink signal. An MPDCCH for allocating radio resources for the signal may be transmitted. By performing such control, it becomes possible to perform communication between the uplink signal and the downlink signal while suppressing the frequency at which the terminal device 102 switches between the uplink communication and the downlink communication.

  In addition, the resource allocation unit 404 specifies a first period in which an uplink signal may be transmitted from the terminal device 102, and is, for example, the same as the first period or at least a part of the first period. The transmission timing of a downlink signal in which a response signal is transmitted in the second period, in which the time interval overlaps or the interval between the first period and the second period is equal to or less than a predetermined value, is specified. Then, the resource allocating unit 404 monitors whether a downlink signal has been generated with a predetermined timing before the transmission timing arrives as a time limit. If the resource allocating unit 404 detects the occurrence of the downlink signal before the predetermined timing, the resource allocating unit 404 transmits the downlink signal so that the response signal to the downlink signal is transmitted in the above-described second period. Transmission timing is determined. The resource allocating unit 404 transmits the MPDCCH indicating the allocation of the radio resource at the previous timing so as to transmit the downlink signal at the determined transmission timing, and then transmits the downlink signal detected to be generated. Send.

  Note that further details of the radio resource allocation by resource allocation section 404 are as described above, and thus description thereof will not be repeated here.

(Processing flow)
Finally, a process executed by the above-described base station apparatus 101 will be schematically described. 5 and 6 show an example of the flow of processing executed by the base station apparatus 101. The base station apparatus 101 executes these processes by, for example, the processor 301 executing a program stored in the ROM 302 or the storage device 304. Here, an outline of the processing will be described, but since further details are as described above, the description will not be repeated here.

  FIG. 5 shows an example of the flow of processing executed by the base station apparatus 101 when the terminal apparatus 102 detects that an uplink signal to be transmitted has occurred (S501). When such an uplink signal is generated, the base station apparatus 101 waits for an untransmitted downlink signal to be generated (S502), and postpones radio resource allocation for the uplink signal. If no untransmitted downlink signal has not been generated for a predetermined period after the generation of the uplink signal (NO in S502, YES in S503), the base station apparatus 101 transmits the uplink signal as it is. To this end, radio resource allocation is performed (S505). On the other hand, if an untransmitted downlink signal occurs during a predetermined period after the generation of the uplink signal (NO in S503 and YES in S502), the base station apparatus 101 The transmission timing of the downlink signal and the uplink signal is determined so as not to transition to a state where the downlink signal can be received between the transmission of the response signal to the transmission and the transmission of the uplink signal. (S504). Then, the base station apparatus 101 executes radio resource allocation such that each of the downlink signal and the uplink signal is transmitted at the determined timing (S505). In this way, the state of executing the uplink communication between the transmission of the response signal of the downlink signal and the transmission of the uplink signal is maintained by postponing the radio resource allocation for the uplink signal. This is performed while the state does not transition to the state of performing downlink communication. Accordingly, the occurrence of guard time can be suppressed, and deterioration of the communication efficiency of the terminal device 102 can be suppressed.

  FIG. 6 shows that, when the base station apparatus 101 transmits a downlink signal, the terminal apparatus 102 transmits the downlink signal at the same time as or near the timing when the terminal apparatus 102 may transmit the uplink signal. The wireless resource allocation for the downlink signal is postponed so as to receive the response signal. In this process, the base station device 101 specifies a first period in which an uplink signal may be transmitted (S601). The base station apparatus 101 manages, for example, the transmission timing of a scheduling request, the timing of a periodic CQI report, or whether or not a periodic radio resource is allocated to the terminal apparatus 102. At some point, the next upcoming first period can be easily identified. Then, for example, the base station apparatus 101 specifies a predetermined timing corresponding to the transmission timing of the downlink signal such that the response signal can be received in the specified first period or a timing close thereto (S602). ). Note that the predetermined timing may be determined in consideration of various conditions such as a time margin for adjustment of radio resource allocation and the like. Then, the base station apparatus 101 waits for generation of a downlink signal (S603). If a predetermined timing has arrived (NO in S603) without a downlink signal being generated (YES in S604), the base station apparatus 101 returns the processing to S601 and starts processing from the specification of the next first period. repeat. On the other hand, if a downlink signal is generated before the predetermined timing has arrived (NO in S604) (YES in S603), the base station apparatus 101 transmits a response signal in the first period or at a timing close thereto. The transmission timing of the downlink signal is determined so that the downlink signal is transmitted at such timing (S605). Then, the base station apparatus 101 allocates the radio resource at the transmission timing for the downlink signal (S606), and transmits the downlink signal on the allocated radio resource. According to this, transmission of a response signal of a downlink signal and transmission of an uplink signal by a scheduling request, a CQI report, and a periodically allocated radio resource keep the state in which the uplink communication is executed. This is performed while the state does not transition to the state of performing downlink communication. Accordingly, the occurrence of guard time can be suppressed, and deterioration of the communication efficiency of the terminal device 102 can be suppressed.

  The base station apparatus 101 can execute the processing in FIG. 5 and the processing in FIG. 6 in parallel. That is, the base station apparatus 101 executes the processing of FIG. 5 when detecting the occurrence of the uplink signal first while continuing to specify the first period and the predetermined timing, and performs the processing of the downlink. When the generation of the signal is detected first, the processing as shown in FIG. 6 can be executed. As a result, it is possible to suppress deterioration in communication efficiency in the terminal device 102.

Claims (14)

A base station device,
Detecting means for detecting that a signal is to be transmitted from the terminal device to the base station device,
Allocating means for allocating a radio resource for transmitting a signal to the base station apparatus, based on the detection of the state,
Has,
The allocating means includes:
When there is no data signal that should be transmitted to the terminal device when the state is detected and has not been transmitted, the wireless resource allocation is postponed until the data signal is generated,
When the data signal is generated for a predetermined period after the state is detected, the response signal is transmitted from the terminal device when the data signal is transmitted to the terminal device, and the state is detected. Assigning the radio resources to the terminal device so that the terminal device does not enter a state of receiving a signal from the base station device while transmission of a signal from the terminal device is performed based on ,
A base station device characterized by the above-mentioned. The allocating means, when the data signal has not been generated for the predetermined period from the detection of the state, to the terminal device, a signal from the terminal device based on the detection of the state, Assigning the radio resources for transmission;
The base station apparatus according to claim 1, wherein: The allocating means allocates the radio resource to the terminal device such that at least a part of a period in which the response signal is transmitted and a period in which a signal based on the detection of the state are transmitted overlap. ,
The base station apparatus according to claim 1, wherein: The predetermined period is set based on an allowable delay time in communication based on detection of the state,
The base station apparatus according to claim 1, wherein: If the data signal occurs while the state is not detected, until the state is detected, postpone transmission of the data signal,
The base station apparatus according to any one of claims 1 to 4, wherein: The detecting means detects the state in response to receiving a scheduling request from the terminal device,
The base station apparatus according to any one of claims 1 to 5, wherein: A base station device,
Detecting means for detecting the occurrence of a data signal to be transmitted to the terminal device;
Specifying means for specifying a first period during which a signal may be transmitted from the terminal device to the base station device;
A determination unit that determines a timing of transmitting the data signal when the occurrence of the data signal is detected before a predetermined timing determined based on the first period; A second period in which the transmission of the response signal from the device is performed, so that the terminal device does not enter a state of receiving a signal from the base station device in a period between the first period, Determining means for determining the timing of transmitting the data signal,
Transmitting means for transmitting the data signal at a timing determined by the determining means,
A base station device comprising: The first period includes a period during which the terminal device is allowed to transmit a scheduling request,
The base station apparatus according to claim 7, wherein: The first period includes a period in which the terminal device should transmit a signal reporting channel quality information between the terminal device and the base station device,
The base station apparatus according to claim 7 or 8, wherein: The first period includes a period in which a radio resource is allocated to the terminal device when a radio resource is periodically allocated to the terminal device,
The base station apparatus according to any one of claims 7 to 9, wherein: The determining means determines the timing such that at least a part of the first period and the second period overlap.
The base station apparatus according to any one of claims 7 to 10, wherein: A method for controlling a base station device,
Detecting means for detecting that a signal is to be transmitted from the terminal device to the base station device,
Allocating means for allocating a radio resource for transmitting a signal to the base station device, based on the detection of the state,
Has,
In the assigning step,
When there is no data signal that should be transmitted to the terminal device when the state is detected and has not been transmitted, the wireless resource allocation is postponed until the data signal is generated,
When the data signal is generated for a predetermined period after the state is detected, the response signal is transmitted from the terminal device when the data signal is transmitted to the terminal device, and the state is detected. Assigning the radio resources to the terminal device so that the terminal device does not enter a state of receiving a signal from the base station device while transmission of a signal from the terminal device is performed based on ,
A control method characterized in that: A method for controlling a base station device,
Detecting means for detecting occurrence of a data signal to be transmitted to the terminal device;
A specifying unit that specifies a first period during which a signal may be transmitted from the terminal device to the base station device;
Determining, when the generation of the data signal is detected before a predetermined timing determined based on the first period, determining a timing of transmitting the data signal; A second period in which a response signal is transmitted from the terminal device to a signal, and a period in which the terminal device receives a signal from the base station device in a period between the first period. A determining step of determining the timing of transmitting the data signal so that there is no
Transmitting means for transmitting the data signal at the timing determined in the determining step,
A control method comprising:   A program for causing a computer to function as each unit included in the base station device according to claim 1.

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