KR101687197B1 - Wireless communication apparatus and method for controlling thereof - Google Patents

Abstract

The present invention relates to a wireless communication apparatus and a control method thereof, and more specifically, to a technique combining a wireless signal transmitted from a plurality of wireless communication terminals to generate and transmit one piece of integrated wireless data, so as to enhance efficiency of wireless communications. According to one embodiment of the present invention, the wireless communication apparatus comprises: a transceiving unit to transceive a wired or wireless signal; and a processor to control operation of the transceiving unit. The processor receives each wireless signal from the plurality of wireless communication terminal through the transceiving unit and combines a media access control (MAC) protocol data unit (MPDU) of each wireless signal received through the plurality of wireless communication terminal into one integrated wireless data. When the wireless signal is transmitted through the transceiving unit, the integrated wireless data is included in a data field of the transmitted wireless signal. The integrated wireless data includes an identifier of the wireless communication terminal transmitting each wireless signal and an identifier of a destination communication apparatus which is a destination of each wireless signal.

Description

[0001] WIRELESS COMMUNICATION APPARATUS AND METHOD FOR CONTROLLING THEREOF [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication apparatus and a control method thereof, and more particularly, to a wireless communication apparatus and a control method thereof that combine wireless signals transmitted from a plurality of wireless communication terminals to generate one integrated wireless data, Lt; / RTI >

Recently, as the spread of mobile devices has widened, wireless LAN technology capable of providing fast wireless Internet service to a large number of people has received much attention. Wireless LAN technology is a technology that allows wireless devices such as smart phones, smart pads, laptop computers, portable multimedia players, and embedded devices to wirelessly access the Internet based on wireless communication technology in close range.

STAs of a wireless LAN perform scanning, authentication, and association to access the Internet through an access point (AP). The search is a procedure for discovering accessible access points. The search procedure can be divided into manual search and active search. It is passive scanning to find a connectable access point by listening to a beacon transmitted periodically by a broadcasting station in the form of a broadcast message, and the terminal transmits a probe request on a specific channel And receiving the probe response transmitted through the specific channel by the receiving access point to find an accessible AP is active scanning. The searching, authentication and combining processes performed by the terminals with the access point are referred to as network connection procedures. A DHCP (Dynamic Host Configuration Protocol) procedure for receiving an IP address may be performed separately from the network connection procedure.

In the wireless LAN, the access point and the terminal perform transmission using a multiple access method called CSMA / CA (Carrier Sensing Multiple Access / Collision Avoidance) and a DCF (Distributed Coordination Function) method in order to transmit all packets including control packets. The CSMA / CA performs transmission when a communication channel to be used when a UE transmits a packet is in an idle state. The DCF is used when a UE that has won a competition through a backoff procedure occupies / uses a communication channel This is a technique for preventing a collision that may occur when a plurality of terminals attempt to transmit a packet at the same time. Since the wireless LAN uses this transmission method on a packet-by-packet basis, when the number of packets to be transmitted is large, the time required for sensing and occupying the occupied state of the communication channel is greatly increased and an ACK signal is transmitted after each packet is transmitted. There is a problem in that a large overhead is generated from the viewpoint of " This problem becomes more serious as the number of terminals connecting to one access point increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of increase in time required for packet transmission and a large overhead problem, and it is an object of the present invention to provide an apparatus and a method for providing a wireless communication method, Lt; / RTI >

According to an embodiment of the present invention, there is provided a wireless communication system including a transmission / reception unit for transmitting / receiving a wire signal or a wireless signal; And a processor for controlling the operation of the transceiver, wherein the processor receives each radio signal from the plurality of radio communication terminals through the transceiver, and controls the MPDU (MAC) of each radio signal received from the plurality of radio communication terminals The wireless communication system according to claim 1, wherein the integrated wireless data is included in a data field of the transmitted wireless signal when the wireless signal is transmitted through the transceiver unit, A wireless communication apparatus including an identifier of a wireless communication terminal that has transmitted the wireless signal and an identifier of the target communication apparatus that is a destination of the wireless signal may be provided.

Here, the processor combines the received radio signal into the integrated wireless data for a predetermined period.

Here, the predetermined period is determined based on an access category of each wireless signal combined into the integrated wireless data.

Here, the predetermined period is determined based on a ratio between data corresponding to the access category, and among the wireless signals combined with the integrated wireless data, real-time data transmission corresponding to an access category that does not require real- The predetermined period is decreased as the ratio of data corresponding to the required access category increases.

Here, the processor combines the received radio signals into the integrated wireless data by a predetermined limit data size.

Here, the processor separately generates integrated wireless data according to the access category of the received wireless signal.

Wherein the wireless communication device is mounted on a moving body, the moving body is operated in a coexisting traveling mode coexisting together with another moving object within a predetermined distance range, or in a single traveling mode in which no moving object exists within the predetermined distance range, The cycle is determined based on whether the moving object is the coexisting traveling mode or the single traveling mode.

Here, the processor decreases the period when the moving object is operated in the coexisting traveling mode and increases the period when operating in the exclusive traveling mode.

According to another embodiment of the present invention, there is provided a wireless communication method including: receiving a wireless signal from a plurality of wireless communication terminals; Combining an MPDU (MAC Protocol Data Unit) of each wireless signal received from the plurality of wireless communication terminals into one integrated wireless data; And transmitting the integrated wireless data by including the integrated wireless data in a data field of a wireless signal, wherein the integrated wireless data includes an identifier of a wireless communication terminal that transmits the wireless signal, The control method of the radio communication apparatus may be provided.

According to another embodiment of the present invention, there is provided a wireless communication system including: a transmission / reception unit transmitting / receiving a wire signal or a wireless signal; And a processor for controlling operations of the transceiver, wherein, for the integrated wireless data in which the MPDUs (MAC Protocol Data Units) of the respective wireless signals of the plurality of wireless communication terminals are combined into one unit, The wireless communication method includes receiving a wireless signal including wireless data, dividing the wireless data into individual wireless signals by referring to a discriminator included in a data field of the wireless signal, And transmits the individual radio signal to the target radio communication apparatus by referring to the identifier of the radio communication terminal that transmitted the signal and the identifier of the target communication apparatus that is the destination of the individual radio signal .

According to another embodiment of the present invention, there is provided a method of wireless communication, the method comprising: receiving a wireless signal including integrated wireless data, wherein the integrated wireless data includes data in which a plurality of MAC Protocol Data Units (MPDUs) being; Dividing the integrated wireless data into individual wireless signals with reference to a differentiator included in a data field of the wireless signal; And transmitting the individual radio signal to the destination radio communication apparatus by referring to the identifier of the radio communication terminal that transmitted the individual radio signal included in the integrated radio data and the identifier of the target communication apparatus that is the destination of the individual radio signal A control method of the radio communication apparatus can be provided.

According to the embodiment of the present invention, it is possible to reduce the time required for competition and the number of transmissions of the ACK signal to occupy the communication channel, thereby increasing the throughput of the entire wireless communication system.

In addition, according to the embodiment of the present invention, since a method of generating integrated wireless data can be determined according to a wireless signal, it is possible to provide a wireless communication service corresponding to a request of a user.

1 is a diagram illustrating a wireless communication apparatus according to an embodiment of the present invention.
2 is a diagram illustrating a wireless communication network according to an embodiment of the present invention.
3 is a diagram illustrating a transmission buffer of a wireless transceiver.
4 is a diagram illustrating a method of transmitting packets of each wireless communication terminal when integrated wireless data is not generated.
5 is a diagram illustrating an address setting method of a wireless LAN and an Ethernet packet in a wireless communication network structure according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating a method of transmitting a wireless signal through integrated wireless data according to an exemplary embodiment of the present invention. Referring to FIG.
7 is a diagram illustrating a method of transmitting and receiving integrated wireless data through a wireless communication apparatus according to an embodiment of the present invention.
8 is a diagram illustrating a method of combining received wireless signals into integrated wireless data for a predetermined period according to an embodiment of the present invention.
FIG. 9 is a diagram illustrating a difference in packet structure of a radio signal when the integrated wireless data is not generated and when it is generated according to the embodiment of the present invention.
10 is a diagram illustrating a packet structure of a radio signal when a radio signal is transmitted through the interim wireless data according to another embodiment of the present invention.
11 is a diagram illustrating a control method of a wireless communication apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise. The term "wireless communication terminal" may be referred to as "terminal" or "terminal" or "STA (Station)" and "access point" may be referred to as "access point" or "AP (access point)". Further, the "address" may be a MAC (Media Access Control) address set in each communication apparatus or terminal.

Configuration of wireless communication network and packet transmission method

1 is a diagram illustrating a wireless communication device 100 according to an embodiment of the present invention. Referring to FIG. 1, a wireless communication terminal 100 according to an embodiment of the present invention may include a transceiver 110 and a processor 120. In addition, according to the method of the present invention, a power supply unit (not shown) for supplying power to the transceiving unit 110 and the processor 120 or a storage unit (not shown) for storing information under the control of the processor 120 (Not shown). According to the method of implementing the present invention, some of the components may be implemented as one component, and some components may be omitted according to the manner of implementing the present invention.

The transceiver 110 may transmit and receive a wire signal or a wireless signal. The wireless communication apparatus 100 may perform wired or wireless communication with an external communication apparatus through the transmission / reception unit 110. [ According to a preferred embodiment of the present invention, the transceiver 110 can transmit and receive a wireless signal using a wireless LAN communication method, but the present invention is not limited thereto. For example, a short distance communication method such as Bluetooth and ZigBee And may transmit and receive a radio signal based on a mobile communication network such as LTE. Also, the transceiver 110 can perform wired communication with an external communication device via an Ethernet cable, but the present invention is not limited thereto.

The processor 120 may control the operation of each part of the wireless communication device 100. According to a preferred embodiment of the present invention, the processor 120 may be implemented by at least one microprocessor, but the present invention is not limited thereto. The processor 120 may be implemented in software firmware, Or may be implemented as a mixture of hardware and software.

According to an embodiment of the present invention, the wireless communication device 100 may generate integrated wireless data. That is, the processor 120 receives the radio signals from the plurality of radio communication terminals through the transceiver 110, and transmits the MPDU (MAC Protocol Data Unit) of each radio signal received from the plurality of radio communication terminals Of integrated wireless data. In addition, when the processor 120 transmits a radio signal through the transceiver 110, the integrated wireless data may be included in a data field of the transmitted radio signal. Here, the integrated wireless data may include an identifier of a wireless communication terminal that has transmitted each wireless signal and an identifier of an object communication device of a destination of each wireless signal (or a communication device that finally receives the individual wireless signal) have.

According to another embodiment of the present invention, the wireless communication device 100 may divide the integrated wireless data into individual wireless signals. That is, the processor 120 receives a radio signal including the integrated wireless data through the transceiver 110 for the integrated wireless data in which the MPDUs of the respective wireless signals of the plurality of wireless communication terminals are combined into one, The integrated wireless data can be divided into individual wireless signals by referring to a discriminator included in a data field of the wireless signal. The processor 120 also refers to the identifier of the wireless communication terminal that transmitted the individual wireless signal included in the integrated wireless data and the identifier of the target communication device that is the destination of the individual wireless signal, Device.

And, the wireless communication device 100 according to the present invention may be an access point, a switch, a router and other wireless transceiver of a wireless communication network. The specific manner of operation of the wireless communication device 100 will be discussed in more detail when describing Figs.

2 is a diagram illustrating a wireless communication network according to an embodiment of the present invention. In FIG. 2, a wireless communication terminal performing wireless communication with each access point is omitted.

According to FIG. 2, a plurality of access points 200A to 200H can be mounted on the moving object V1, and the access points mounted on the moving object can provide a wireless communication service to the wireless communication terminal inside the moving object or around the moving object . At this time, the access points 200A to 200D can be connected to the switch 400A (first switch, hereinafter, switch 1) by wire, and the access points 200E to 200H can be connected to the switch 400B (second switch, hereinafter, switch 2). The switches 400A and 400B can transmit the signals transmitted from the respective access points to the wireless transceivers 300A and 300B connected to the wired network, respectively. In FIG. 1, the access point of the moving object V1 is shown dividedly connected to the two switches 400A and 400B. However, the present invention is not limited to this, and all the access points may be connected to one switch. Alternatively, a plurality of radio transceivers may be connected to one switch and each may be configured to transmit a dispersed radio signal or packet. At this time, the dispersion of the radio signal or the packet may be processed in a round robin manner, but is not limited thereto.

2, the wireless transceiver 300A can perform wireless communication with the wireless transceiver 300C, and the wireless transceiver 300B can perform wireless communication with the wireless transceiver 300D. Here, the radio transceivers 300C and 300D may be installed around a line passing through the moving object V1, but are not limited thereto. According to another embodiment of the present invention, the wireless transceiver 300A may perform wireless communication with the wireless transceiver 300D or the wireless transceiver 300B may perform wireless communication with the wireless transceiver 300C according to the movement of the moving object V1. Here, each of the wireless transceivers may be an access point. A signal of a wireless communication terminal connected to the wireless communication network via the access points 200A to 200H by the wireless communication between the wireless transceivers is switched to a switch 400C (third switch, hereinafter, switch 3) connected to the wireless transceiver 300C or 300D 400D (fourth switch, hereinafter, switch 4), and finally reach the router 500, which is the target communication device of the signal, or the communication device of the server or other network. Of course, signal transmission in the reverse direction of the signal transmission described above is possible, and thus, a signal or a packet generated in the router 500 or the communication apparatus of the server or the other network is transmitted to the wireless communication terminal connected to the access points 200A to 200H .

At this time, wireless signals transmitted / received between the wireless transceivers 300A and 300C or between 300B and 300D may include integrated wireless data. A detailed description of the integrated wireless data will be made in the description of FIGS. 6 to 10.

According to an embodiment of the present invention, the switches 400A to 400D of FIG. 2 may be L2 switches or L3 switches, but are not limited thereto. The moving body V1 may be any type of transportation means. For example, the moving body may be a vehicle (passenger car), a train (train, subway / train), a bus, a truck, a platoon, Or the like. However, the category of the moving object is not limited to that described above, and the location of the access point according to the present invention is not limited to the moving object. In another embodiment, each access point may be configured to provide a wireless communication service to a wireless communication terminal inside the building, which is installed inside the building.

3 is a diagram illustrating a transmission buffer of a wireless transceiver. The wireless transceiver of FIG. 3 may be an embodiment of a wireless communication apparatus according to an embodiment of the present invention, and the transmission buffer of the wireless transceiver may be a buffer of a wireless communication apparatus according to an embodiment of the present invention. In FIG. 3, the notation of the terminal 1 to the terminal 10 means respective packets transmitted from the first wireless communication terminal to the tenth wireless communication terminal. According to FIG. 3, the size of each packet is different. Each packet may have a different size depending on the type of the packet or the information included in the data field of the packet.

Each of the wireless transceivers shown in FIG. 2 can store a signal or a packet received through a wire in a transmission buffer for wireless transmission. Referring to FIG. 2, the transmission buffer may include a structure for storing each packet in a queue according to the order of reception of the packet. That is, according to FIG. 3, the packet includes a terminal 1 packet, a terminal 3 packet, a terminal 5 packet, a terminal 4 packet, a terminal 2 packet, a terminal 8 packet, a terminal 6 packet, , The terminal 10 has been received in the order of the packets and can be stored in the transmission buffer in that order. However, the order in which the transport buffer stores packets is not limited to this. Integrated wireless data may be generated based on the signal or packet stored in the transmission buffer.

Meanwhile, according to another embodiment of the present invention, the signal or packet may be stored in different transmission buffers according to information included in each field of a signal or a packet. According to a preferred embodiment of the present invention, packets may be stored separately in the transmission buffer according to the Access Category of each packet. And integrated wireless data may be separately generated based on signals or packets stored in a transmission buffer according to each of the access categories. According to an embodiment of the present invention, the access category may include, but is not limited to, Voice, Video, Best Effort, Background.

If there are a plurality of transmission buffers of a wireless transceiver, a packet to be transmitted to the outside may be determined according to a separate internal contention procedure. According to a preferred embodiment of the present invention, the contention procedure may be an internal contention procedure defined in the WLAN specification.

4 is a diagram illustrating a method of transmitting packets of each wireless communication terminal when integrated wireless data is not generated. The wireless transceiver of FIG. 3 may sequentially transmit the packets stored in the transmission buffer, and the packets transmitted from the respective wireless communication terminals may be transmitted individually. When the wireless transceiver transmits a signal via the wireless LAN scheme, as shown in FIG. 4, each packet waits for a period of time for transmission (e.g., in the case of a best effort access category packet, The wireless transceiver transmits a packet when it is able to occupy the communication channel after completion of the contention procedure, and receives an ACK signal from the packet receiving side after SIFS (Short Inter-Frame Space) As shown in FIG. 4, when the packets of the respective wireless communication terminals are individually transmitted, a wait time due to competition of backoff is required for each packet transmission, for example, a time of SIFS, and an ACK signal is separately transmitted If the number of packets to be transmitted is increased, the amount of time required to transmit the wireless communication resource < RTI ID = 0.0 > The overhead of the entire wireless communication network can be increased.

5 is a diagram illustrating an address setting method of a wireless LAN and an Ethernet packet in a wireless communication network structure according to an embodiment of the present invention.

5 (a) shows a packet structure of a wireless LAN according to the IEEE 802.11 standard and a packet structure of an Ethernet. Referring to FIG. 2, a wireless communication terminal inside or inside a moving object can perform wireless communication with the access points 200A to 200H according to a wireless LAN system. In addition, in FIG. 2, wireless communication can be performed according to the wireless LAN method between the wireless transceivers 300A to 300D, and the packet structure according to FIG. 5A can be utilized when performing wireless communication. In the wire section indicated by the solid line in FIG. 2, packets according to the Ethernet packet structure shown in FIG. 5 (a) can be mutually transmitted and received.

5A, a transmitter address (TA) and a receiver address (RA) may be set in an Ethernet packet, and address 1 (Address 1), address 2 Address 2), Address 3 (Address 3), and Address 4 (Address 4). Here, each of the address values may be a MAC address, but is not limited thereto. In case of a wireless LAN packet, a frame control value and a From DS (Ditribution System) and a To DS parameter can be additionally set. On the other hand, in each packet structure, the preamble may be a primitive corresponding to the manner in which each signal is transmitted, and not all the primitives need to be in the same format.

2, the address (or MAC address) of the wireless communication terminal is represented by STA1 to STAn, and the address of the access point 200A to 200D in the mobile body communicating with the wireless communication terminal is AP0 or BSSID (Base Service Set ID) 0, the address of the wireless transceiver 300A mounted on the moving body is AP1 or BSSID1, and the address of the wireless transceiver 300C installed on the ground is AP2 or BSSID2. 2, the addresses of the switches 400A to 400D are represented by switches 1 to 1 through 4, and the address of the router 500 is indicated by a router.

According to the embodiment of the present invention, the address of each packet can be set as follows. For example, according to FIG. 5 (b), when a packet is transmitted from an access point to a wireless communication terminal, From DS may be set to 1 and To DS may be set to 0, address 1 is BSSID 0, One of the addresses STA1 to STAn of the communication terminal, and the address 3 may be set to AP1. In the wired section between the access point 200A to 200D and the wireless transceiver 300A in the moving body, TA can be set to one of STA1 to STAn and RA to AP1 according to the Ethernet packet structure.

5C shows an address setting method when a packet is transmitted from the radio transceiver 300A to 300C. In this case, From DS = 1, To DS = 1, AP = 2, AP = 2, AP = Router, address 4 may be one of STA1 to STAn. That is, in this case, all the addresses for transmission of the radio signal can be individually set individually. Meanwhile, according to FIG. 5 (c), the wireline section packet between the routers in the wireless transceiver 300C may have one of the TA addresses STA1 to STAn and an RA address router.

If the L3 switch is installed before or after the switch 1 (400A) in FIG. 2, the address of the transmission path of the packet may be one of STA1 to STAn-> L3 switch-> AP1-> AP2-> have. In the opposite direction, the address can be set to one of router -> AP2 -> AP1 -> L3 switch -> STA1 to STAn. 5D shows an address setting method when a packet is transmitted through a wire section of the wireless transceiver 300C in a router and an address setting method when a packet is transmitted through a wireless section of the wireless transceiver 300A in the wireless transceiver 300C , The TA in the wire section may be set as a router, and the RA may be set as one of STA1 to STAn. In the wireless section, address 1 may be AP1, address 2 may be AP2, address 3 may be one of STA1 to STAn, and address 4 may be a router . 5E shows an address setting method when a packet is transmitted through the wired section of the access point 200A to 200D in the wireless transceiver 300A and an address setting method when the packet is transmitted through the wireless section of the wireless communication terminal in the access point 200A to 200D In the wired section, TA is AP1 and RA is one of STA1 to STAn. In the wireless section, address 1 may be AP1, address 2 may be BSSID0, and address 3 may be one of STA1 to STAn.

Integrated wireless data generation method and transmission method

FIG. 6 is a diagram illustrating a method of transmitting a wireless signal through integrated wireless data according to an exemplary embodiment of the present invention. Referring to FIG.

The radio communication apparatus 100A according to the embodiment of the present invention receives each radio signal from a plurality of radio communication terminals and combines the MPDUs of the respective radio signals received from the plurality of radio communication terminals into one integrated wireless data . In addition, the wireless communication apparatus 100C according to the embodiment of the present invention can receive a wireless signal including integrated wireless data, and can divide the integrated wireless data into individual wireless signals. In the following description, a wireless communication device may be referred to as an integrated wireless data processor.

According to Fig. 6 (a), packets of each wireless communication terminal can be transmitted to the integrated wireless data processor 100A through the switch 1 (400A). The integrated wireless data processor 100A may combine the packets of each wireless communication terminal into one packet and transmit the packet to the wireless transceiver 300A. Here, the packets of the respective wireless communication terminals may be MPDUs. According to FIG. 6, such aggregated packets may be included in the data field of the packet as aggregated wireless data. At this time, the transmitting-side integrated wireless data processor 100A may serve as a transmitter on behalf of another wireless communication terminal, and the receiving-side integrated wireless data processor 100B may serve as a receiver on behalf of the target communication device of each packet. Referring to FIG. 2, the integrated wireless data processor 100A may serve as a transmitter mounted on a moving object, and the integrated wireless data processor 100B may serve as a receiver on the ground. In accordance with an embodiment of the present invention, TA may be switch 1, and RA may be switch 3 in the wired section from integrated wireless data processor 100A to wireless transceiver 300A.

When each packet of a plurality of wireless communication terminals is combined or reconfigured as one packet, the wireless transceiver 300A receives only one competition procedure and one ACK as shown in FIG. 6 (b) The integrated wireless data processor according to the present invention contributes to the entire network in terms of time and overhead.

Meanwhile, the communication network structure of FIG. 6 is merely an example, and the present invention is not limited to the connection structure of the respective devices of FIG. In addition, although the integrated wireless data processor is shown as a separate device in FIG. 6, an integrated wireless data processor may be included in a wireless transceiver or a switch.

FIG. 7 is a diagram illustrating a method for transmitting and receiving integrated wireless data through a wireless communication device or an integrated wireless data processor 100A or 100B according to an embodiment of the present invention.

The integrated wireless data processor 100A according to the present invention can generate integrated wireless data by combining signals or packets transmitted from each wireless communication terminal and transmit the generated integrated wireless data to the other integrated wireless data processor 100B . The integrated wireless data processor 100B receiving the integrated wireless data can separate the integrated wireless data into individual wireless signals. Specifically, the integrated wireless data processor 100B can transmit each individual wireless signal to the destination communication device, which is the destination of each individual wireless signal. Both integrated wireless data processors can perform combining and demarcation of signals or packets. Thus, two integrated wireless data processors can maximize the efficiency of the communication network by transmitting and receiving mutually integrated wireless data.

8 is a diagram illustrating a method of combining received wireless signals into integrated wireless data for a predetermined period according to an embodiment of the present invention. In FIG. 8, the arrows on the horizontal axis represent the progress of time, and T represents the predetermined period.

According to a preferred embodiment of the present invention, a wireless communication device (or an integrated wireless data processor) may combine the received wireless signal into the integrated wireless data for a predetermined period of time (e.g., 200 ms). According to FIG. 8, data (or signals, packets) transmitted between the beginning of a period and the end of a period can be combined into one integrated wireless data, A new period can be started. However, the starting condition of the period according to the present invention is not limited to this, and a new period may be started as soon as the previous period expires.

At this time, the predetermined period may be determined based on information included in each field of the radio signal combined with the integrated wireless data. That is, the period may be determined based on at least one of a data capacity of a wireless signal, a type of a wireless signal, an access category of the wireless signal, an address of the target communication device of the wireless signal, or a type of the target communication device. For example, as the data capacity of the wireless signal combined with the integrated wireless data increases, the period may increase, and the wireless signal may be transmitted through one integrated wireless data transmission. As another example, the period may be determined depending on whether the type of the radio signal is a packet for transmitting data or a packet for controlling. Alternatively, the period may be reduced as the ratio of control packets to data packets is increased in a wireless signal combined with integrated wireless data. Accordingly, the integrated wireless data including a relatively large number of control packets can be generated and transmitted for a shorter period. Accordingly, the control packet can be transmitted to the target communication device with a higher frequency, so that the management of the communication network can be easily performed. As another example, the predetermined period may be determined based on the access category of each wireless signal combined into the aggregated wireless data. For example, since the wireless signals included in the voice access category need to be transmitted to the destination wireless device as soon as they are generated at the wireless communication terminal, the period may be reduced to meet this criterion. Since the generation and transmission of the integrated wireless data can be performed more frequently according to the decrease of the period, it is possible to favor the correspondence of the wireless signals included in the voice access category. Packets of various access categories may be stored in a transmission buffer of a wireless communication apparatus (or an integrated wireless data processor) according to the present invention. According to a preferred embodiment of the present invention, the period includes a ratio between data corresponding to the access category (For example, a best effort or a background category) that does not require real-time data transmission among the wireless signals combined with the integrated wireless data, For example, the predetermined period may be reduced as the ratio of data corresponding to voice or video increases. For example, for a voice, video, best effort, and background access category, the period for a 4: 4: 1: 1 ratio of packets or data in each category is 2: 3: 2: 3 So that real-time processing of voice or video packets can be performed easily. Here, irrespective of the access category, the period may be set to decrease as the ratio of radio signals requiring real-time transmission among the radio signals coupled to the integrated wireless data increases. According to another example, the period may be determined based on the address or type of the destination communication device. If the target communication device is a communication device that plays an important role in the communication network such as security or network management, the packet transmitted to the communication device needs to be transmitted more frequently. Therefore, when generating the integrated wireless data including the related packet The period can be reduced.

2, a wireless communication apparatus (or an integrated wireless data processor) according to another embodiment of the present invention may also be mounted on the moving body, and the access point, the switch, the wireless transceiver, and the like may be mounted on the moving body. May be wirelessly or wiredly connected to the above-described communication devices. At this time, the period may be determined based on the speed or the traveling direction of the moving object. For example, it can be determined that the period is 200 ms when the moving object travels at 40 km / h and the period is 50 ms when the moving object travels at 100 km / h. Alternatively, the period may be reduced as the speed of the moving body increases. In this case, it is assumed that the mobile body communicates with an access point (radio transceiver) on a line or a road main surface while moving along a line or a road. It is assumed that a time for performing wireless communication with a specific access point . In order to successfully transmit a radio signal during a short communication time, the capacity of the integrated wireless data must be reduced, and moreover, the integrated wireless data needs to be generated more frequently, which can be achieved through reduction of the period. That is, the wireless communication apparatus (or the integrated wireless data processor) according to the present invention can reduce the period when the mobile unit is operated in the coexisting traveling mode and increase the period when operating in the single traveling mode. As another example, when the moving object is a gyro line train, the period may be determined depending on whether the traveling direction of the moving object is a Seoul run or a Bus run. For example, the period of the wireless communication apparatus mounted on the moving object to Seoul may be 200 ms, and the period of the wireless communication apparatus mounted on the bus moving object may be 300 ms, thereby managing the wireless communication resources according to each traveling direction individually Can be performed. As another example, the period may be increased as the installation interval of the ground wireless transceiver or the access point performing communication with the wireless transceiver or the wireless communication device of the mobile terminal becomes wider.

Meanwhile, the moving object may be operated in a coexisting traveling mode coexisting together with another moving object within a predetermined distance range, or in a sole traveling mode in which no moving object exists within the predetermined distance range, Mode or the single-travel mode. That is, when the moving object travels in the coexistent traveling mode, the competition of the communication channel among various wireless communication devices mounted on each moving object may be intensified, so that the integrated wireless data generated for a shorter period of time is transmitted / received . Thus, even in the coexisting traveling mode, the wireless communication apparatuses of the respective mobile units can smoothly perform wireless communication.

According to another embodiment of the present invention, the wireless communication device (or the integrated wireless data processor) may combine the received wireless signals into the integrated wireless data by a predetermined limit data size. The limit data size may be determined based on information included in each field of the radio signal combined with the integrated wireless data. That is, the predetermined limit data size is determined based on at least one of the data capacity of the radio signal, the type of the radio signal, the access category of the radio signal, the address of the target communication device of the radio signal or the type of the target communication device . The size of the limit data may be proportional to the length T of the cycle described above, and the detailed description of each item will be omitted.

Meanwhile, the wireless communication apparatus (or the integrated wireless data processor) according to the present invention can individually generate integrated wireless data based on the capacity of the wireless signal (or packet). For example, a wireless communication device may generate integrated wireless data separately for a wireless signal having a packet size of 64 bits or more and a wireless signal having a size of less than 64 bits. Alternatively, the wireless communication apparatus can generate integrated wireless data according to the type of the wireless signal. For example, the wireless communication device can individually generate integrated wireless data comprised of data packets or control packets. Alternatively, the wireless communication device may separately generate the integrated wireless data according to the access category of the wireless signal. For example, the wireless communication device may separately generate integrated wireless data for voice packets, video packets, best effort packets, and background packets. Alternatively, the wireless communication device may separately generate integrated wireless data according to the address or type of the target communication device of the wireless signal. For example, the wireless communication device may separately generate integrated wireless data for a wireless signal with the security server as the target communication device. And, each integrated wireless data may be generated based on individual periods or individual limit data sizes.

Meanwhile, according to the above description, the integrated wireless data may be a combination of packets transmitted from a plurality of wireless communication terminals, and accordingly, each packet may include an identifier of the wireless communication terminal that transmitted the packet, And may include an identifier. The identifiers may be referred to when the integrated wireless data is later divided into individual wireless signals and then transmitted to each target communication device.

FIG. 9 is a diagram illustrating a difference in packet structure of a radio signal when the integrated wireless data is not generated and when it is generated according to the embodiment of the present invention. In Fig. 9, A1 to A4 indicate addresses 1 to 4 in the wireless LAN communication method.

Fig. 9 (a) shows packets of each wireless communication terminal individually transmitted in the situation of Fig. 4 in more detail, and if the integrated wireless data is not utilized, each packet must be transmitted separately. In order to transmit each packet, a separate contention procedure must be performed and an ACK must be received each time the packet is transmitted.

FIG. 9 (b) shows a situation where packets (or radio signals) of the wireless communication terminals are combined into integrated wireless data. In particular, Fig. 9 (b) may be a representation of the integrated wireless data generated by a switch in a communications network or a separate wireless communications device or an integrated wireless data processor.

According to a preferred embodiment of the present invention, a header (for example, a MAC header) in which an address of a wireless communication terminal transmitting each packet or an address of a target communication apparatus of each packet is combined with a data field of each packet, Data can be included together. Here, the combined signal of the header and the data field may be a MAC protocol data unit (MPDU) in the wireless LAN. According to a method of implementing the present invention, the MPDU may have a structure in which an FCS (Frame Check Sequence) is omitted from a normal MPDU, but the present invention is not limited thereto. At this time, the entire wireless signal or packet including the integrated wireless data may have a separate header. If the wireless communication device or the integrated wireless data processor according to the present invention is implemented as a separate device, it may have a MAC address, and when transmitting and receiving the integrated wireless data, May be included in the header.

On the other hand, the integrated wireless data must be capable of being separated or disassembled into individual wireless signals by the receiving wireless communication device or the integrated wireless data processor. According to a preferred embodiment of the present invention, the aggregated wireless data may include a discriminator, which may be located between each packet included in the aggregated wireless data or between the MPDUs described above. The receiving wireless communication device or the integrated wireless data processor may divide the integrated wireless data into individual wireless signals based on the identifier of the integrated wireless data. The discriminator may be configured according to the format defined in 802.11n or 802.11ac as shown in Fig. 9 (b), but the present invention is not limited thereto. The transmitting-side radio communication apparatus (or the integrated radio data processor) and the receiving-side radio communication apparatus can use the identifiers of the same format.

The distinguisher according to the present invention is not limited to the example of FIG. 9 (b), and may be configured to include only the MPDU length, the delimiter signature, and the CRC. Here, the length of the MPDU is used to indicate where the MPDU is after the distinguisher, and the CRC is used to check whether or not there is an error of the distinguisher. The delimiter signature is used to detect the distinguisher easily and can be implemented in a specific pattern .

On the other hand, if the performance of the wireless communication apparatus or the integrated wireless data processor according to the present invention is excellent and the individual wireless signals (or the MPDUs) can be easily distinguished from the integrated wireless data, have.

10 is a diagram illustrating a packet structure of a radio signal when a radio signal is transmitted through the interim wireless data according to another embodiment of the present invention. In particular, FIG. 10 illustrates the case where the wireless transceiver 300A (address AP1) and 300C (address AP2) of FIG. 2 act as an integrated wireless data processor.

10 (a) shows a case where the wireless transceiver 300A serving as a source performs a role of an integrated wireless data processor, and transmits integrated wireless data in a tunneling form. 10 (a) shows a case in which the radio transceiver 300C on the receiving side is a normal radio transceiver, and a separate receiving-side integrated radio data processor is provided after the radio transceiver 300C. In this case, the MAC header indicating the address of the wireless transceiver 300A may be separately combined with the integrated wireless data included in the transmitted wireless signal.

FIG. 10 (b) shows a case where each wireless transceiver can play the role of an integrated wireless data processor. In this case, the MAC header indicating the address of the source wireless transceiver may be omitted. Instead, a packet transmitted from each wireless communication terminal is combined with a separate MAC header, and the identifier may be included between the MPDUs.

11 is a diagram illustrating a control method of a wireless communication apparatus according to an embodiment of the present invention.

According to Fig. 11 (a), a method of controlling a wireless communication apparatus or a source-side integrated wireless data processor according to an embodiment of the present invention may include a step (S110) of receiving a wireless signal from a plurality of wireless communication terminals. According to the control method, the MPDUs of the radio signals received from the plurality of wireless communication terminals can be combined into one integrated wireless data (S120). According to the control method, the integrated wireless data may be included in the data field of the wireless signal and transmitted (S 130). The integrated wireless data may include an identifier of a wireless communication terminal that transmits the wireless signal and an identifier of the target communication device that is a destination of the wireless signal.

Referring to FIG. 11 (b), a method of controlling a wireless communication device or a receiving-side integrated wireless data processor according to an embodiment of the present invention may include receiving a wireless signal including integrated wireless data (S210). Here, the integrated wireless data may be data in which the MPDUs (MAC Protocol Data Units) of the respective wireless signals of the plurality of wireless communication terminals are combined into one. According to the control method, the integrated wireless data can be divided into individual wireless signals by referring to the identifier included in the data field of the wireless signal (S220). According to the control method, referring to the identifier of the wireless communication terminal that transmitted the individual wireless signal included in the integrated wireless data and the identifier of the target communication device that is the destination of the individual wireless signal, To the wireless communication device (S230). The detailed description of each step will be omitted since it has been discussed with reference to FIGS. 1 to 10. FIG.

According to the embodiment of the present invention, it is possible to reduce the time required for competition and the number of transmissions of the ACK signal to occupy the communication channel, thereby increasing the throughput of the entire wireless communication system.

In addition, according to the embodiment of the present invention, since a method of generating integrated wireless data can be determined according to a wireless signal, it is possible to provide a wireless communication service corresponding to a request of a user.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Accordingly, it is to be understood that within the scope of the appended claims, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (11)

A transmission / reception unit for transmitting / receiving a wire signal or a wireless signal; And
And a processor for controlling operation of the transceiver,
The processor comprising:
Receiving the radio signals from the plurality of radio communication terminals through the transceiver,
(MAC Protocol Data Unit) of each wireless signal received from the plurality of wireless communication terminals into one integrated wireless data,
Generating a MAC packet including an integrated data field including the integrated wireless data and an integrated MAC header as a MAC (Media Access Control) header of the integrated wireless data,
Wherein when transmitting a radio signal through the transceiver, the MAC packet is included in the transmitted radio signal,
Wherein the integrated wireless data includes an identifier of a target communication device which is a destination of each MPDU,
Wherein each of the MPDUs included in the integrated wireless data is distinguished by a delimiter inserted between the MPDUs.
The method according to claim 1,
Wherein the processor combines the received wireless signals into the integrated wireless data for a predetermined period of time.
3. The method of claim 2,
Wherein the predetermined period is determined based on an access category of each wireless signal combined with the integrated wireless data.
The method of claim 3,
Wherein the predetermined period is determined on the basis of a ratio between data corresponding to the access category, and a wireless signal combined with the integrated wireless data includes data corresponding to an access category that does not require real- And the predetermined period is decreased as the ratio of data corresponding to the category increases.
The method according to claim 1,
Wherein the processor combines the received radio signals into the integrated wireless data by a predetermined limit data size.
The method according to claim 1,
Wherein the processor separately generates integrated wireless data according to an access category of the received wireless signal.
3. The method of claim 2,
The radio communication apparatus is mounted on a moving body,
The moving body is operated in a coexisting traveling mode coexisting together with another moving object within a predetermined distance range or in a single traveling mode in which no moving object is present within the predetermined distance range,
Wherein the period is determined based on whether the moving object is the coexisting traveling mode or the single traveling mode.
8. The method of claim 7,
Wherein the processor decreases the period when the moving object is operated in the coexisting traveling mode and increases the period when the moving object is operated in the exclusive traveling mode.
Receiving a radio signal from a plurality of radio communication terminals;
Combining an MPDU (MAC Protocol Data Unit) of a wireless signal received from the plurality of wireless communication terminals into one integrated wireless data;
Generating a MAC packet including an integrated data field including the integrated wireless data and an integrated MAC header as a MAC (Media Access Control) header of the integrated wireless data; And
And transmitting the MAC packet in a radio signal,
Wherein the integrated wireless data includes an identifier of a target communication device which is a destination of each MPDU,
Wherein the MPDUs included in the integrated wireless data are distinguished from each other by a delimiter inserted between the MPDUs.
A transmission / reception unit for transmitting / receiving a wire signal or a wireless signal; And
And a processor for controlling operation of the transceiver,
A data field including unified wireless data that is data in which a plurality of MPDUs (MAC Protocol Data Units) of wireless signals of a plurality of wireless communication terminals are combined together and an integrated MAC (Media Access Control) header For a MAC packet containing a header
The processor comprising:
Receiving a radio signal including the MAC packet through the transceiver,
Dividing the integrated wireless data into the MPDUs with reference to a delimiter inserted between the MPDUs,
And transmits each of the MPDUs to the destination wireless communication apparatus by referring to the identifier of the target communication apparatus included in the integrated wireless data, which is a destination of each MPDU.
The method comprising the steps of: receiving a radio signal including a MAC (Media Access Control) packet, wherein the MAC packet is a combination of a MAC Protocol Data Unit (MPDU) of each radio signal of a plurality of radio communication terminals, And an integrated MAC header as a MAC header of the integrated wireless data;
Dividing the integrated wireless data into respective MPDUs with reference to a delimiter inserted between the MPDUs; And
And transmitting each of the MPDUs to the destination wireless communication apparatus by referring to the identifier of the target communication apparatus included in the integrated wireless data, which is a destination of each MPDU.

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