JP5185735B2 - Wireless communication apparatus and wireless communication method - Google Patents

Description

  The present invention relates to a wireless communication apparatus and a wireless communication method using TCP.

  In Internet communication, TCP (Transmission Control Protocol) is widely used as a transport layer protocol in the OSI reference model. In order to ensure reliability in TCP, a receiving device that has received data (packets) transmitted by a transmitting device transmits an acknowledgment (ACK) to the transmitting device, thereby notifying that data has been received.

  If the transmitting device can receive an ACK for the transmitted data, it can confirm that the data has arrived at the receiving device. On the other hand, if the transmitting apparatus cannot receive the ACK within a predetermined time, it determines that the data has not reached the receiving apparatus and retransmits the same data. With such a retransmission processing mechanism, even if a packet is lost in the middle of a communication path, the packet can be transmitted to the other party without being lost, thereby enabling reliable communication.

  In TCP, the receiving apparatus determines a receivable capacity, that is, RWIN (Receive Windows) before transmitting one ACK based on its own receiving capacity. Then, when the transmitting device receives the RWIN transmitted by the receiving device, the transmitting device can grasp the amount of data that can be received before the receiving device transmits ACK, that is, the maximum amount of data that can be received. it can.

  However, when the receiving apparatus transmits ACK immediately after receiving data from the transmitting apparatus, that is, when transmitting ACK in a short period of time that the processing of the data received in the buffer of the receiving apparatus is not yet performed, The received data remains unprocessed in the buffer of the receiving device. Therefore, the receiving apparatus notifies the transmitting apparatus of an RWIN that is smaller than the truly receivable capacity. The transmitting apparatus notified of a small RWIN transmits data only with a small capacity based on the notified RWIN, so that the network bandwidth utilization efficiency is deteriorated and the throughput is lowered. Such a phenomenon is called SWS (Silly Window Syndrome).

  Therefore, a technique called delayed ACK (Delayed ACK) that prevents the ACK from being overrun by delaying ACK transmission is used.

  FIG. 9 is an explanatory diagram for explaining delayed ACK. As shown in FIG. 9, transmission of ACK in delayed ACK is roughly divided into three described below. First, the receiving apparatus 10 receives two packets from the transmitting apparatus 12, that is, does not return an ACK until it receives data twice (indicated by (1) in FIG. 9). In addition, when receiving the first packet, the receiving apparatus 10 starts a timer for timeout, and if the second data is not received (timeout occurs) before a predetermined time (for example, 300 msec) ends, ACK is sent back to the transmitter 12 (indicated by (2) in FIG. 9). Further, when there is data transmission from the receiving device 10 before the timer expires, ACK and data are transmitted to the transmitting device 12 in one packet (indicated by (3) in FIG. 9).

As a technique for preventing the occurrence of bursty ACK and reducing the load on the communication path, for example, Patent Document 1 detects a time interval at which data is received, and the detected time interval is a first predetermined value. A technique for reducing the number of ACKs to be transmitted in the case of the above is disclosed. Further, in Patent Document 1, an interval at which an ACK is generated is detected, and if the generation interval of the ACK is equal to or greater than a second predetermined value, the ACK reduction is stopped.
JP 2006-101339 A

  By adopting the delayed ACK described above, in a network having a bandwidth of about several tens to one hundred and several tens of Kbps, it is possible to prevent the occurrence of bursty ACKs and avoid a decrease in throughput.

  However, in recent years, broadbandization of communication networks such as the Internet has progressed, and in a wireless broadband system through wireless communication, the problem of SWS has been re-emerging as the network bandwidth has increased to about 3 Mbps. This is due to the fact that the number of data (packets) received in a predetermined time is increased as the bandwidth is increased because the ACK response is limited according to the number of data receptions. Therefore, it is possible to increase the number of receivable data before responding with an ACK. However, in wireless communication in which the communication environment often changes abruptly, the ACK will not be returned to the transmitting device for a long time. Is also envisaged. Therefore, the transmitting device may time out before the ACK from the receiving device is returned, and may determine that the packet has not reached the receiving device.

  In the future, it is anticipated that the network will be further widened, and the problem of throughput reduction due to ACK bursts is expected to become more serious. Therefore, it is considered necessary to develop an ACK transmission algorithm to replace the delayed ACK.

  Therefore, in view of such a problem, the present invention suppresses random response signal transmission by returning the response signal (ACK) of the reception device at an appropriate timing without changing the setting of the transmission device. An object of the present invention is to provide a wireless communication apparatus and a wireless communication method capable of improving the throughput of the communication.

In order to solve the above problems, a typical configuration of the present invention is a wireless communication apparatus that is connected to a network and transmits and receives data by transmitting a response signal to the transmission source of the packet when the packet is received. Then, when the communication unit connected to the network, the communication unit receives the first packet, the time counting unit that measures the first time, and the second that measures the second time after the first time has elapsed. During the time measurement of the first time and the time measurement of the first time, the response signal for the received packet is not transmitted regardless of the number of packet reception after the first packet, and the response signal is received after the first time is over. A response signal transmitting unit that controls the communication unit to transmit the response , and the response signal transmitting unit responds without waiting for the end of the second time when a packet is received during the time measurement of the second time. Trust Controls the communication unit to transmit, to control the communication unit to when the reception of the packet in the second time counting was not transmits a response signal after the count end of the second time It is characterized by that.

  With the configuration including the first time in which the response signal is not returned to the transmission device, the response signal can be returned based on the time from the reception of the first packet, not the number of reception of the packet (data). . In the case where response of response signals is limited by the number of packet receptions, the transmission device cannot accurately grasp the time when the response signals are returned. For this reason, when the communication environment with the receiving apparatus deteriorates rapidly, the transmitting apparatus may time out before the response signal from the receiving apparatus is returned, and may determine that the packet has not reached the receiving apparatus. . However, by limiting the response signal response based on the time from the reception of the first packet as in the present invention, the transmission device can appropriately receive the response signal regardless of the performance of the reception device and the communication environment. Can do.

  In addition, when a receiving device such as a conventional delayed ACK returns a response signal according to the number of data receptions, the transmitting device cannot predict the time for the response signal to return, and thus data is not normally transmitted to the receiving device. May be determined and the retransmission sequence may be performed. However, if the present invention is applied, the receiving apparatus returns a response signal based on time rather than the number of receptions of the response signal, so that the transmitting apparatus does not perform a useless retransmission sequence.

In addition, the first time is a period in which no problem occurs even if the response signal is not transmitted, and when the response signal is not returned from the end of the second time, data retransmission occurs. It's time. Therefore, after the first time has elapsed, the second time is further measured, and by having the same function as the delayed ACK, a response signal is returned before the data is retransmitted in the transmission apparatus. Thereby, it is possible to suppress the retransmission of useless data while maintaining the reliability of TCP.

  When the transmission data to the network side occurs during the time measurement of the first time and the second time, the wireless communication device transmits without waiting for the end of the first time and the second time. You may further provide the superimposition transmission part which transmits a response signal to a communication part with data.

  When transmission data occurs, by superimposing a response signal on the transmission data, there is no need to separately transmit a response signal, and resources can be reduced.

In order to solve the above-mentioned problem, another typical configuration according to the present invention is a wireless system that transmits and receives data by transmitting a response signal to a transmission source of a packet when connected to a network and receiving the packet. A wireless communication method in a communication apparatus, wherein when a first packet is received from the network side, a first time during which a response signal for the received packet is not transmitted regardless of the number of receptions of the packet after the first packet is measured. And after the elapse of the first time, when a second time is further measured, and when a packet is received during the time measurement of the second time, a response signal is transmitted without waiting for the end of the second time. If no packet is received during the time measurement of the step or the second time, a response signal is transmitted after the time measurement of the second time ends. With any of the-up, characterized in that it comprises a.

  The component corresponding to the technical idea in the wireless communication apparatus described above and the description thereof can be applied to the wireless communication method.

  As described above, according to the present invention, the response signal of the receiving device is returned at an appropriate timing without changing the setting of the transmitting device, thereby suppressing the response signal from being randomly generated and improving the communication throughput. It becomes possible.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  In the present embodiment, a wireless communication apparatus and a wireless communication method capable of improving communication throughput by suppressing the occurrence of response signals (hereinafter simply referred to as ACK) will be described. In the following embodiments, in order to facilitate understanding, the overall configuration of a wireless communication system using a wireless communication device will be described first, and then the specific configuration of the wireless communication device will be described in detail. Here, a mobile phone is cited as a wireless communication device. However, the present invention is not limited to this, and a PCMCIA slot or USB (Universal Serial) provided in a PHS (Personal Handy-pone System) terminal, a personal computer, a notebook personal computer, or the like. Wireless communication devices for various electronic devices that can acquire e-mails, such as expansion devices to be mounted on Bus), PDAs (Personal Digital Assistants), digital cameras, music players, car navigation systems, portable TVs, game machines, DVD players, remote controllers, etc. Can also be used.

(Wireless communication system 100)
FIG. 1 is an explanatory diagram showing a schematic connection relationship of a wireless communication system. The wireless communication system 100 includes a mobile phone 110 as a receiving device, a base station 120, a communication network 130 including an Ethernet (registered trademark), an ISDN (Integrated Services Digital Network) line, the Internet, a dedicated line, and the like. The relay server 140 and the distribution server 150 as a transmission device are configured. In the present embodiment, only one-way data communication in which the distribution server 150 as a transmitting device transmits data to the mobile phone 110 as a receiving device is shown, but it goes without saying that the correspondence relationship is reversed.

  In the wireless communication system 100, when a user tries to execute Web browsing, video distribution, etc. through the mobile phone 110, the mobile phone 110 first makes a wireless connection request to the base station 120 within the communicable range. . The base station 120 that has received the wireless connection request requests the relay server 140 to establish a communication connection with the communication partner via the communication network 130, and the relay server 140 secures a communication path with the distribution server 150, and Communication between 110 and the distribution server 150 is established.

  In such a wireless communication system 100, various techniques are employed to improve the communication speed and communication quality between the mobile phone 110 and the base station 120. In the present embodiment, for example, CDMA (Code Division Multiple Access) that multiplies a different code for each mobile phone 110 is adopted.

  Furthermore, in this embodiment, “CDMA2000 1 × EV-DO (Evolution Data Only)” (communication standard) is adopted as the wireless broadband system. Since CDMA2000 1 × EV-DO employs adaptive modulation and coding that switches the modulation method and coding rate according to the communication environment such as radio wave conditions, communication at a communication speed of about 3 Mbps can be performed.

  Even if the conventional delayed ACK is used in the wireless communication system 100 as described above, the problem of SWS cannot be avoided in a broadband network of about 3 Mbps.

  Therefore, in the present embodiment, without changing the setting of the distribution server 150 (transmission device), the mobile phone 110 (reception device) returns an ACK at an appropriate timing, thereby suppressing ACK randomness and communication throughput. Can be improved.

  Hereinafter, the mobile phone 110 as a wireless communication device in the wireless communication system 100 will be described in detail.

(Mobile phone 110)
FIG. 2 is a functional block diagram showing the hardware configuration of the mobile phone according to the present embodiment, and FIG. 3 is a perspective view showing the appearance of the mobile phone. The mobile phone 110 includes a terminal control unit 210, a terminal memory 212, a terminal display unit 214, a terminal operation unit 216, a voice input unit 218, a voice output unit 220, and a communication unit 222. The

  The terminal control unit 210 manages and controls the entire mobile phone 110 using a semiconductor integrated circuit including a central processing unit (CPU). In addition, the terminal control unit 210 performs a call function, a mail transmission / reception function, an imaging function, a music playback function, and a TV viewing function using the program in the terminal memory 212.

  The terminal memory 212 includes a ROM, RAM, EEPROM, nonvolatile RAM, flash memory, HDD (Hard Disk Drive), and the like, and stores programs processed by the terminal control unit 210, audio data, and the like.

  The terminal display unit 214 is configured by a liquid crystal display, an EL (Electro Luminescence) display, or the like, and stores information stored in the terminal memory 212 or provided from an external server (not shown) via the communication network 130 on the Web. The content or application GUI (Graphical User Interface) can be used for display.

  The terminal operation unit 216 includes switches such as a keyboard, a cross key, and a joystick, and accepts user operation inputs. The voice input unit 218 includes a microphone or the like, and converts the user's voice input during a call into an electric signal that can be processed in the mobile phone 110. The audio output unit 220 includes a speaker, and converts the audio signal of the other party received by the mobile phone 110 into audio and outputs it. Also, a ring tone, an operation sound of the terminal operation unit 216, an alarm sound, and the like can be output.

  The communication unit 222 performs wireless communication with the base station 120 in the communication network 130 and transmits / receives packets (data) to / from the distribution server 150.

  Further, in the present embodiment, the terminal control unit 210 also functions as a time measuring unit 240, a second time measuring unit 242, a response signal transmitting unit 244, and a superimposing transmitting unit 246.

  The time counting unit 240 counts the ACK non-response time as the first time from the time when the packet transmitted from the distribution server 150 is first received after the previous ACK transmission.

  The second time measuring unit 242 measures a predetermined time as a second time after the ACK non-response time.

  The response signal transmission unit 244 does not return an ACK no matter how many times the packet is received within the ACK non-response time counted by the time counting unit 240, and a predetermined time is not set after the ACK non-response time ends. Alternatively, if the predetermined time is 0, ACK is immediately transmitted. That is, the ACK non-response time is a period during which ACK transmission is reserved.

  Thereby, the reply of ACK can be limited based on the time since the reception of the first packet, not the number of times of receiving the packet (data). When the ACK reply is limited by the number of packet receptions as in the case of the conventional delayed ACK, the distribution server 150 cannot accurately grasp the time when the ACK is returned. For this reason, when the communication environment between the mobile phone 110 and the base station 120 deteriorates, the distribution server 150 times out before the ACK is returned from the mobile phone 110 and the packet does not reach the mobile phone 110. May be judged. However, by limiting the ACK response based on the time from when the first packet is received as in this embodiment, the distribution server 150 appropriately receives the ACK regardless of the performance of the mobile phone 110 and the communication environment. be able to.

  Further, when the conventional mobile phone 110 (receiving device) such as delayed ACK returns ACK according to the number of data receptions, the distribution server 150 (transmitting device) cannot predict the time when the ACK is returned. There is a risk that it may be determined that data is not normally transmitted and a retransmission sequence may be performed. However, in this embodiment, since the mobile phone 110 returns ACK based on time rather than the number of ACK receptions, the distribution server 150 does not perform a useless retransmission sequence.

  In addition, when the predetermined time is set and the response signal transmission unit 244 receives a packet within the predetermined time counted by the second time counting unit 242, the response signal transmission unit 244 immediately transmits an ACK and transmits the packet within the predetermined time. If not received, ACK is transmitted after the end of the predetermined time. That is, the predetermined time is a period of waiting for the succession to cancel the reservation of ACK transmission.

  The ACK non-response time described above is a period during which no problem occurs even if ACK is not transmitted, and the end of the predetermined time is a time during which data retransmission occurs if ACK is not returned. Therefore, the second time counting unit 242 counts a predetermined time after the ACK non-response time has elapsed, and the response signal transmitting unit 244 performs the same operation as the delayed ACK, whereby the distribution server 150 retransmits the data. ACK is returned before occurrence. Thereby, it is possible to suppress the retransmission of useless data while maintaining the reliability of TCP.

  In the present embodiment, the sum of the ACK non-response time counted by the time counting unit 240 and the predetermined time counted by the second time counting unit 242 is equal to or less than the upper limit time of the delayed ACK timer.

  Here, the upper limit time of the timer used for delayed ACK is 500 msec, but 200 to 300 msec is widely used. Therefore, the total of the ACK non-response time measured by the time measuring unit 240 and the predetermined time measured by the second time measuring unit 242 may be 200 to 300 msec or less.

  The distribution server 150 (transmitting device) determines whether the wireless communication device (receiving device) of the transmission partner is the mobile phone 110 as the wireless communication device according to the present embodiment or a conventional device that only supports the delayed ACK function. There are cases where it cannot be determined. Accordingly, by making the sum of the ACK non-response time and the predetermined time substantially equal to the time of the delayed ACK timer, the distribution server 150 as a transmission device can adapt to both without any change in software or the like. It becomes possible.

  When transmission data is generated, superimposition transmission section 246 transmits ACK together with the data regardless of the ACK non-response time and the predetermined time.

  As a result, when transmission data is generated, by superimposing ACK on the transmission data, it is not necessary to separately transmit ACK, and resources can be reduced.

  4 and 5 are explanatory diagrams for explaining ACK reply by the mobile phone according to the present embodiment.

  As shown in FIG. 4, the transmission form of ACK by the mobile phone 110 according to the present embodiment is roughly divided into three as described below. That is, when a packet is received within a predetermined time, an ACK is returned (indicated by (1) in FIG. 4). When a packet is not received within a predetermined time, an ACK is returned after the completion of a predetermined time (FIG. 4). (Indicated by (2))), when transmission data is generated, ACK is returned together with the data (FIG. 5).

  First, when the mobile phone 110 receives the first packet from the distribution server 150, the time counting unit 240 measures the ACK non-response time, and the response signal transmission unit 244 receives the packet several times within the ACK non-response time. Also does not return ACK. Furthermore, the second time measuring unit 242 measures a predetermined time after the ACK non-response time ends, and the response signal transmitting unit 244 returns an ACK when receiving a packet within the predetermined time ((1) in FIG. 4). ), It is reset for the next time measurement without reaching the predetermined time.

  In the case where the mobile phone 110 does not receive a packet while the second time measuring unit 242 is measuring the predetermined time, the response signal transmitting unit 244 transmits an ACK after the completion of the predetermined time (see FIG. 4 (2).).

  As shown in FIG. 5, in the mobile phone 110, when data to be transmitted to the distribution server 150 is generated within the ACK non-response time (indicated by (1) in FIG. 5), data is generated within a predetermined time. In the case (indicated by (2) in FIG. 5), the superimposition transmission unit 246 transmits ACK together with the data.

  As described above, according to the mobile phone 110 according to the present embodiment, the ACK is recklessly returned by returning the ACK of the mobile phone 110 at an appropriate timing without changing the setting of the transmission device such as the distribution server 150. It is possible to suppress and improve the communication throughput.

  Next, a wireless communication method using the mobile phone 110 and the distribution server 150 in the wireless communication system 100 described above will be described.

(Wireless communication method)
6, 7, and 8 are flowcharts showing a specific processing flow of the wireless communication method according to the present embodiment. In particular, FIG. 6 shows an ACK response based on data reception, FIG. 7 shows an ACK non-response time and an ACK response based on a predetermined time timer, and FIG. ACK reply will be explained. Here, a configuration will be described in which the mobile phone 110 as a receiving device receives a packet from the distribution server 150 as a transmitting device via the base station 120, but the base station that relays the packet for easy understanding Description will be made with 120 omitted.

  As shown in FIG. 6, the reply of ACK based on the reception of data of the mobile phone 110 is processed as follows.

  First, when the mobile phone 110 first receives a packet from the distribution server 150 (S300: packet reception step), it is determined whether or not the second time counting unit 242 is measuring a predetermined time (S302). : Predetermined time determination step). When the packet is received for the first time, it is determined that the predetermined time has not been measured (NO in S302), and it is subsequently determined whether or not the ACK non-response time is being measured in the time counting unit 240 ( S304: Non-response time determination step). Again, since the time counting unit 240 has not started counting the ACK non-response time (NO in S304), the time counting unit 240 starts from the time when the first packet is received (when this packet is received) and the subsequent packets are not received. Regardless of the number of times of reception, time measurement of an ACK non-response time that does not return ACK is started (S306: time measurement start step).

  When the ACK non-response time ends regardless of the reception of a further packet, the second time counting unit 242 starts measuring a predetermined time according to a timer process (FIG. 7) described later. When the packet is received after the measurement of the predetermined time is started, it is determined in the predetermined time determination step S302 that the predetermined time is being measured (YES in S302), and the response signal transmission unit 244 transmits ACK ( (S308: ACK transmission step), the terminal control unit 210 resets a timer that times a predetermined time and a timer that times an ACK non-response time (S310: reset step).

  As shown in FIG. 7, the ACK reply based on the ACK non-response time and the predetermined time of the mobile phone 110 is processed as follows.

  First, in the process based on data reception (FIG. 6), it is determined whether or not time measurement of the ACK non-response time has been started (S320: time measurement start step). It is repeatedly determined whether or not the response time has ended (S322: non-response end determination step), and time measurement is performed until the time measurement of the ACK non-response time ends (S324: non-response time determination execution step).

  When the time measurement of the ACK non-response time ends (YES in S322), it is repeatedly determined whether or not the predetermined time has ended (S326: predetermined time end determination step), and the time measurement is performed until the time measurement for the predetermined time ends. (S328: predetermined time keeping execution step).

  When the measurement of the predetermined time is completed (YES in S326), an ACK is transmitted along with the end of the ACK non-response time and the predetermined time (S330: ACK transmission step), and a timer for measuring the ACK non-response time and the predetermined time are measured. The timer to be reset is reset (S332: reset step).

  As shown in FIG. 8, the ACK response when the data to be transmitted in the mobile phone 110 is generated is as follows.

  When data to be transmitted to distribution server 150 (transmission device) is generated in mobile phone 110 (S340: data generation step), it is determined whether there is currently received reception data (S342: reception data determination step), If there is received data, ACK is transmitted together with the data generated in data generation step S340 (S344: transmission data and ACK transmission step). Then, the timer for counting the ACK non-response time and the timer for measuring the predetermined time are reset (S346: reset step).

  As described above, also in the wireless communication method according to the present embodiment, the mobile phone 110 does not return an ACK while counting the ACK non-response time, and therefore does not return an ACK no matter how many times a packet is received during this time. . Thereby, transmission of ACK can be reduced. Therefore, it is possible to suppress a decrease in communication throughput due to the random occurrence of ACK.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in the above-described embodiment, the mobile phone 110 as a wireless communication device has a period in which ACK is not returned by providing the time measuring unit 240, but the present invention is applicable to any device using TCP. It can be applied, and can naturally be used in a device that performs wired communication.

  In the above-described embodiment, a mobile phone that communicates with a base station using CDMA communication has been described as an example, but it goes without saying that the communication method is not limited to this. For example, the present invention can be suitably used even for a wireless communication apparatus connected to an access point by wireless LAN or WiMAX. The present invention can also be applied to a configuration in which the base station is an access point.

  Note that each step in the wireless communication method of the present specification does not necessarily have to be processed in time series in the order described in the flowchart, and may include processing in parallel or a subroutine.

  The present invention can be used for a wireless communication apparatus and a wireless communication method using TCP.

It is explanatory drawing which showed the rough connection relation of the radio | wireless communications system. It is the functional block diagram which showed the hardware constitutions of the mobile telephone. It is the perspective view which showed the external appearance of the mobile phone. It is explanatory drawing for demonstrating the reply of ACK by the mobile telephone concerning this embodiment. It is explanatory drawing for demonstrating the reply of ACK by the mobile telephone concerning this embodiment. It is the flowchart which showed the flow of the specific process of the radio | wireless communication method (reply of ACK based on reception of data) concerning this embodiment. It is the flowchart which showed the flow of the specific process of the radio | wireless communication method (ACK reply based on the timer of ACK non-response time and predetermined time) concerning this embodiment. It is the flowchart which showed the flow of the specific process of the radio | wireless communication method (reply of ACK when the data to transmit occur) concerning this embodiment. It is explanatory drawing for demonstrating delay ACK.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Wireless communication system 110 ... Mobile phone 120 ... Base station 130 ... Communication network 140 ... Relay server 150 ... Distribution server 210 ... Terminal control part 212 ... Terminal memory 214 ... Terminal display part 216 ... Terminal operation part 218 ... Voice input part 220 ... voice output unit 222 ... communication unit 240 ... time measuring unit 242 ... second time measuring unit 244 ... response signal transmitting unit 246 ... superimposing transmitting unit

Claims (4)

A wireless communication device that is connected to a network and transmits / receives data by transmitting a response signal to a transmission source of the packet when receiving the packet,
A communication unit connected to the network;
When the communication unit receives the first packet, a time counting unit for measuring a first time;
A second time measuring unit for measuring a second time after the first time has elapsed;
During the measurement of the first time, a response signal for the received packet is not transmitted regardless of the number of packet receptions after the first packet, and a response signal is transmitted after the first time is over. And a response signal transmission unit for controlling the communication unit ,
The response signal transmission unit controls the communication unit to transmit the response signal without waiting for the end of the second time when a packet is received during the time measurement of the second time, Wherein the communication unit is controlled so as to transmit the response signal after the time measurement of the second time is completed when no packet is received during the time measurement of time 2. Communication device. If transmission data to the network side occurs during the timing of the first time and the second time, the response signal is transmitted together with the transmission data without waiting for the end of the first time and the second time. The wireless communication apparatus according to claim 1, further comprising: a superimposing transmission unit that causes the communication unit to transmit a message. 3. The wireless communication according to claim 1, wherein the first time is a period during which the transmission of the response signal is reserved, and the second time is a period during which the opportunity to cancel the reservation is waited. apparatus. A wireless communication method in a wireless communication apparatus that transmits and receives data by transmitting a response signal to a transmission source of a packet when connected to a network and receiving the packet,
Receiving a first packet from the network side, counting a first time during which a response signal for the received packet is not transmitted regardless of the number of receptions of the packet after the first packet;
After the first time has elapsed, further measuring a second time;
The step of transmitting the response signal without waiting for the end of the second time when a packet is received during the measurement of the second time, or the reception of the packet is not received during the measurement of the second time. And a step of transmitting the response signal after the time measurement of the second time is completed .

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