KR20170011189A - Apparatus and method for avoiding collision for communication - Google Patents

Abstract

An electronic device is disclosed. The electronic device according to various embodiments of the present invention includes a communication interface which transmits a signal and receives ACK in response to the transmission, and a processor which determines a signal receiving region for collision avoidance. The processor is set to change a parameter to determine the signal receiving region based on the ACK. Besides, various embodiments grasped through the present specification are possible. Accordingly, the present invention can minimize a collision between electronic devices in wireless communication by dynamically controlling the parameter to determine the signal receiving region.

Description

[0001] APPARATUS AND METHOD FOR AVOIDING COLLISION FOR COMMUNICATION [0002]

The embodiments disclosed herein relate to a technique for changing parameters that determine a signal receiving region for determining a channel state according to a received ACK.

Various types of electronic products are being developed and distributed by the development of electronic technology. Particularly, in recent years, electronic devices capable of wireless communication such as smart phones and tablet PCs are spreading.

The above-described electronic device typically includes a communication interface for wireless networking. In particular, when an electronic device communicates through a relay device such as an access point, the electronic device can determine a channel state using a method such as clear channel assessment (CCA). The electronic device may send a signal to the access point if the channel is in an idle state.

When determining the channel condition, the electronic device receives a signal from another electronic device in the fixed signal receiving area to determine the channel condition. That is, the channel state is determined without considering the density of the relay apparatus or the density of the electronic apparatus to communicate with the relay apparatus. Particularly, when the signal receiving area is wide, the number of electronic devices which are in competition with each other in the channel use becomes excessive, and collisions occur between electronic devices using different relay devices, Can be reduced. In addition, when the signal reception area is narrow, the number of electronic devices that are in competition with each other is excessively small, and thus collision between electronic devices using the same relay device may occur.

In order to solve the above-mentioned problems and the problems raised in this document, the embodiments disclosed in this document dynamically control a parameter for determining a signal receiving region according to whether or not an ACK is successfully received for a signal transmitted to a relay apparatus And to provide an electronic apparatus and method that can perform the same.

An electronic device according to an embodiment disclosed herein includes a communication interface for transmitting a signal, receiving an ACK in response to transmission, and a processor for determining a signal receiving area for collision avoidance, And may be set to change a parameter for determining a signal receiving area based on the received signal.

In addition, the method according to an embodiment disclosed in this document includes the steps of transmitting a signal, receiving an ACK in response to a transmission, and changing an parameter that determines a signal receiving area based on an ACK for collision avoidance . ≪ / RTI >

In addition, the storage medium according to the embodiment disclosed in this document may be configured to transmit a signal, to receive an ACK in response to transmission, and to change a parameter that determines a signal receiving area based on an ACK for collision avoidance And may include instructions configured to perform an operation.

According to the embodiments disclosed in this document, by dynamically controlling parameters that determine a signal receiving area, collision between electronic devices in wireless communication can be minimized. In addition, by giving the electronic device an optimal communication opportunity, the overall throughput can be increased. Further, the wireless communication speed can be improved without changing the hardware configuration in the electronic device.

In addition, various effects can be provided that are directly or indirectly understood through this document.

1A and 1B show an environment in which an electronic device according to various embodiments of the present invention operates.
2A and 2B show an environment in which an electronic device according to various embodiments of the present invention operates.
3 is a block diagram showing a configuration of an electronic device according to an embodiment of the present invention.
4 illustrates an electronic device in a network environment according to various embodiments.
5 is a flowchart showing a communication collision avoiding method of an electronic device according to an embodiment of the present invention.
6 is a flowchart showing a communication collision avoiding method of an electronic device according to another embodiment of the present invention.
7 is a flowchart showing a communication collision avoiding method of an electronic device according to another embodiment of the present invention.
8 is a graph showing the relationship between the number of electronic devices and the throughput according to an embodiment of the present invention.
9 shows a block diagram of an electronic device according to various embodiments.
10 shows a block diagram of a program module according to various embodiments.

Various embodiments of the invention will now be described with reference to the accompanying drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes various modifications, equivalents, and / or alternatives of the embodiments of the invention. In connection with the description of the drawings, like reference numerals may be used for similar components.

In this document, the expressions "have," "may," "include," or "include" may be used to denote the presence of a feature (eg, a numerical value, a function, Quot ;, and does not exclude the presence of additional features.

In this document, the expressions "A or B," "at least one of A and / or B," or "one or more of A and / or B," etc. may include all possible combinations of the listed items . For example, "A or B," "at least one of A and B," or "at least one of A or B" includes (1) at least one A, (2) Or (3) at least one A and at least one B all together.

The expressions "first," " second, "" first, " or "second ", etc. used in this document may describe various components, It is used to distinguish the components and does not limit the components. For example, the first user equipment and the second user equipment may represent different user equipment, regardless of order or importance. For example, without departing from the scope of the rights described in this document, the first component can be named as the second component, and similarly the second component can also be named as the first component.

(Or functionally or communicatively) coupled with / to "another component (eg, a second component), or a component (eg, a second component) Quot; connected to ", it is to be understood that any such element may be directly connected to the other element or may be connected through another element (e.g., a third element). On the other hand, when it is mentioned that a component (e.g., a first component) is "directly connected" or "directly connected" to another component (e.g., a second component) It can be understood that there is no other component (e.g., a third component) between other components.

As used herein, the phrase " configured to " (or set) to be "adapted to, " To be designed to, "" adapted to, "" made to, "or" capable of ". The term " configured (or set) to "may not necessarily mean " specifically designed to" Instead, in some situations, the expression "configured to" may mean that the device can "do " with other devices or components. For example, a processor configured (or configured) to perform the phrases "A, B, and C" may be a processor dedicated to performing the operation (e.g., an embedded processor), or one or more software programs To a generic-purpose processor (e.g., a CPU or an application processor) that can perform the corresponding operations.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the other embodiments. The singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art. The general predefined terms used in this document may be interpreted in the same or similar sense as the contextual meanings of the related art and are intended to mean either ideally or in an excessively formal sense It is not interpreted. In some cases, even the terms defined in this document can not be construed as excluding the embodiments of this document.

An electronic device in accordance with various embodiments of the present document may be, for example, a smartphone, a tablet personal computer, a mobile phone, a video phone, an e-book reader, Such as a desktop PC, a laptop PC, a netbook computer, a workstation, a server, a personal digital assistant (PDA), a portable multimedia player (PMP) A camera, or a wearable device. According to various embodiments, the wearable device may be of the type of accessory (e.g., a watch, a ring, a bracelet, a bracelet, a necklace, a pair of glasses, a contact lens or a head-mounted-device (HMD) (E. G., Electronic apparel), a body attachment type (e. G., A skin pad or tattoo), or a bioimplantable type (e.g., implantable circuit).

In some embodiments, the electronic device may be a home appliance. Home appliances include, for example, televisions, DVD players, audio, refrigerators, air conditioners, vacuum cleaners, ovens, microwaves, washing machines, air cleaners, set- (Such as a home automation control panel, a security control panel, a TV box such as Samsung HomeSync ™, Apple TV ™ or Google TV ™), a game console (eg Xbox ™, PlayStation ™) A dictionary, an electronic key, a camcorder, or an electronic frame.

In an alternative embodiment, the electronic device may be any of a variety of medical devices (e.g., various portable medical measurement devices such as a blood glucose meter, a heart rate meter, a blood pressure meter, or a body temperature meter), magnetic resonance angiography (MRA) Navigation system, global navigation satellite system (GNSS), event data recorder (EDR), flight data recorder (FDR), infotainment (infotainment) ) Automotive electronic equipment (eg marine navigation systems, gyro compass, etc.), avionics, security devices, head units for vehicles, industrial or home robots, automatic teller's machines (ATMs) Point of sale, or internet of things (eg, light bulbs, various sensors, electrical or gas meters, sprinkler devices, fire alarms, thermostats, street lights, A toaster, a fitness equipment, a hot water tank, a heater, a boiler, and the like).

According to some embodiments, the electronic device is a piece of furniture or a part of a building / structure, an electronic board, an electronic signature receiving device, a projector, Water, electricity, gas, or radio wave measuring instruments, etc.). In various embodiments, the electronic device may be a combination of one or more of the various devices described above. An electronic device according to some embodiments may be a flexible electronic device. Further, the electronic device according to the embodiment of the present document is not limited to the above-described devices, and may include a new electronic device according to technological advancement.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electronic apparatus according to various embodiments will now be described with reference to the accompanying drawings. In this document, the term user may refer to a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).

1A and 1B show an environment in which an electronic device according to various embodiments of the present invention operates.

1A, electronic devices 111, 112, and 113 may communicate wirelessly with an access point 140. As shown in FIG. The electronic devices 111, 112, and 113 shown in FIG. 1A can be distributed at a relatively low density compared to the electronic device shown in FIG. 2A. The electronic device 111 may determine the channel condition by considering the electronic device 112 located within the signal receiving area 151 for communication with the access point 140. [ The electronic device 111 may sense a signal transmitted from the electronic device 112 to determine a channel state.

In this case, the electronic device 111 may not be able to detect a signal transmitted from the electronic device 113 located outside the signal receiving area 151. Thus, when the electronic device 113 is communicating with the access point 140, the electronic device 111 may determine that the channel is in an idle state. That is, the electronic device 111 may fail to transmit signals to the access point 140 by the electronic device 113 in communication with the access point 140. Therefore, the electronic device 111 can change the signal receiving area 151 to prevent the failure of signal transmission.

Referring to FIG. 1B, electronic devices 111, 112, and 113 may communicate wirelessly with access point 140. The electronic device 111 may determine the channel condition by considering the electronic devices 112 and 113 located in the signal receiving area 151a for communication with the access point 140. [ The electronic device 111 can detect a channel state by sensing signals transmitted from the electronic devices 112 and 113.

As shown in FIG. 1B, by changing the signal receiving area 151 of FIG. 1A to the signal receiving area 151a of FIG. 1B, it is possible to prevent the electronic device 111 from failing to transmit a signal due to the electronic device 113.

2A and 2B show an environment in which an electronic device according to various embodiments of the present invention operates.

2A, electronic devices 211, 212, 213, 214, and 215 may communicate wirelessly with a first access point 241 and electronic devices 221, 222, and 223 may communicate wirelessly with a second access point 242 And the electronic devices 231, 232, and 233 can communicate wirelessly with the third access point 243. The electronic devices 211 to 215, 221 to 223, and 231 to 233 shown in FIG. 2A can be distributed with a relatively high density as compared with the electronic device shown in FIG. 1A. The electronic device 211 can determine the channel state by considering the electronic devices 212, 213, 214, 215, 221, 222, 231, and 232 located in the signal receiving area 251 for communication with the first access point 241. [ The electronic device 211 can determine a channel state by sensing signals transmitted from the electronic devices 212, 213, 214, 215, 221, 222, 231 and 232.

In this case, the electronic device 211 can determine the channel state in consideration of the electronic devices 221, 222, 231, and 232 that do not communicate with the first access point 241. Thus, the electronic device 211 can determine that the channel is in a busy state due to the electronic device electronics 221, 222, 231, and 232 even if the channel is idle. That is, the electronic device 211 may unreasonably lose the communication opportunity due to the electronic devices 221, 222, 231 and 232. Thus, the electronic device 211 can change the signal receiving area 251 to prevent loss of communication opportunity.

Referring to FIG. 2B, electronic devices 211, 212, 213, 214 and 215 may communicate wirelessly with a first access point 241 and electronic devices 221, 222, and 223 may communicate wirelessly with a second access point 242 And the electronic devices 231, 232, and 233 can communicate wirelessly with the third access point 243. The electronic device 211 can determine the channel state in consideration of the electronic devices 211, 212, 213, 214, and 215 located in the signal receiving area 251a for communication with the first access point 241. [ The electronic device 211 can determine the channel state by sensing signals transmitted from the electronic devices 211, 212, 213, 214 and 215.

As shown in FIG. 2B, by reducing the signal receiving area 251 of FIG. 2A to the signal receiving area 251a of FIG. 2B, when the electronic devices are densified, the electronic device 211 collides with the electronic devices 221, 222, 231 and 232 The phenomenon of losing communication opportunity can be prevented.

3 is a block diagram showing a configuration of an electronic device according to an embodiment of the present invention.

Referring to FIG. 3, an electronic device 301 according to an embodiment of the present invention may include a communication interface 310 and a processor 320. The electronic device 310 can communicate wirelessly with the relay device 302 via the communication interface 310.

The electronic device 301 may change a parameter for determining a signal receiving area which is an area capable of receiving a signal from another electronic device to determine a channel state for wireless communication. The electronic device 301 can change the parameter so that the signal receiving area is increased or decreased based on the received ACK.

In this specification, the signal receiving area means an area where the electronic device 301 receives signals from other electronic devices to determine the channel status. The electronic device 301 can determine the channel condition based on the received strength of the signal received from other electronic devices in the signal receiving area. In this specification, the parameter for determining the signal receiving area means a value that is changed in the electronic device 301 such that the signal receiving area is increased or decreased. For example, the parameter may be a CCA threshold value.

The communication interface 310 can communicate with the relay apparatus 302 wirelessly. The communication interface 310 may transmit signals transmitted from the processor 320 and may transmit signals received from the outside to the processor 320. The communication interface 310 may be, for example, an 802.11 communication module.

According to one embodiment, the communication interface 310 may send a signal to the relay device 302. The communication interface 310 may receive an ACK from the relay device 302 in response to the transmitted signal. If the communication interface 310 fails to receive an ACK for a predetermined time, it can retransmit the signal. The communication interface 310 can receive an ACK with an error when a problem occurs in transmission to the relay apparatus 302. [ The communication interface 310 can retransmit the signal when receiving an ACK with an error.

Communication interface 310 may receive signals from other electronic devices. According to one embodiment, the communication interface 310 may receive a signal from an electronic device located within the signal receiving area to determine the channel condition. For example, when determining the channel state by a clear channel assessment (CCA) scheme, the communication interface 310 may sense a signal transmitted from an electronic device located in a signal receiving area defined by a CCA threshold .

The processor 320 may control the operation of the communication interface 310. Processor 320 may generate and transmit signals via communication interface 310 and may process signals received via communication interface 310.

According to one embodiment, the processor 320 may determine the status of a channel for wireless communication with the relay apparatus 302. [ For example, the processor 320 may determine whether the channel state is a busy state or an idle state according to the CCA scheme. The processor 320 may determine the channel condition based on RSSI (Received Signal Strength Indicator) level of the signal received via the communication interface 310 from another electronic device in the signal receiving area. For example, the processor 320 may determine that the channel state is a congestion state when a signal of a predetermined RSSI level or higher is received from another electronic device in the signal receiving area.

According to one embodiment, the processor 320 may determine the signal receiving area for collision avoidance. Processor 320 may determine the signal receiving area in accordance with the relationship between electronic device 301 and other electronic devices to avoid collision between electronic device 301 and other electronic devices.

According to one embodiment, the processor 320 may change parameters that determine the signal receiving area based on the ACK received via the communication interface 310. [ For example, the processor 320 may change parameters based on whether an ACK has been received.

According to one embodiment, the processor 320 counts the number of times the ACK has been received and may change the parameter so that the signal receiving area is increased if the ACK is successfully received more than a predetermined number of times. For example, the processor 320 may change the parameter so that the signal receiving area is increased when ACK is received five times in a row.

According to one embodiment, the processor 320 may determine that the ACK is failed if the ACK is not received or received with an error. For example, the processor 320 may determine that the ACK is unsuccessful if no ACK has been received for the specified time. Alternatively, the processor 320 may determine that the ACK failed if an ACK was received with an erroneous FCS (frame check sequence).

According to one embodiment, the processor 320 counts the number of times the ACK has failed and may change the parameter so that the signal receiving area is reduced if the ACK fails more than the specified number of times. For example, the processor 320 may change the parameters so that the signal receiving area is reduced if the ACK fails three times in a row.

According to one embodiment, the processor 320 may set a threshold based on the ACK received via the communication interface 310 and determine a signal receiving area based on the set threshold. The threshold may be, for example, a CCA threshold. When the threshold value is the CCA threshold value, the signal reception area decreases when the threshold value increases, and the signal reception area increases when the threshold value decreases.

According to one embodiment, the processor 320 may change the parameters to increase the variation width of the signal receiving area when the increase or decrease of the signal receiving area is repeated. For example, the processor 320 may change the parameter so that the signal receiving region is increased by 2 if the ACK has been successfully received and the signal receiving region has been increased by 1 through the change of parameters .

According to one embodiment, when the ACK fails more than a predetermined number of times, the processor 320 can again determine the channel status through the communication interface 310. [ The processor 320 may change the parameter so that the signal receiving area is reduced when the channel state is a congested state. The processor 320 may maintain the parameter if the channel state is idle.

According to one embodiment, the processor 320 may maintain a parameter if the transmission rate at which a signal is transmitted from the communication interface 310 is lower than a predetermined value. The indication of the transmission rate may be, for example, a modulation and coding scheme (MCS) value.

The relay device 302 may be a device that relays the electronic device 301 to be connected to the wireless network. The relay apparatus 302 may be, for example, an access point. The relay device 302 can transmit and receive signals to and from the electronic device 301 via the communication interface 310 of the electronic device 301.

4 illustrates an electronic device in a network environment according to various embodiments.

Referring to FIG. 4, electronic devices 401, 402, 404 or servers 406 in various embodiments may be interconnected via network 462 or local area communication 464. The electronic device 401 may include a bus 410, a processor 420, a memory 430, an input / output interface 450, a display 460, and a communication interface 470. In some embodiments, the electronic device 401 may omit at least one of the components or additionally include other components.

The bus 410 may include circuitry, for example, for connecting the components 410-170 to each other and for communicating (e.g., control messages and / or data) between the components.

Processor 420 may include one or more of a central processing unit (CPU), an application processor (AP), or a communications processor (CP). The processor 420 may perform, for example, operations or data processing related to control and / or communication of at least one other component of the electronic device 401. [

Memory 430 may include volatile and / or non-volatile memory. The memory 430 may store instructions or data related to at least one other component of the electronic device 401, for example. According to one embodiment, memory 430 may store software and / or program 440. The program 440 may include, for example, a kernel 441, a middleware 443, an application programming interface (API) 445, and / or an application program (or & At least a portion of the kernel 441, middleware 443, or API 445 may be referred to as an Operating System (OS).

The kernel 441 may include, for example, system resources (e.g., bus 410, processor 420, etc.) used to execute an operation or function implemented in other programs (e.g., middleware 443, API 445, or application program 447) Memory 430, etc.). In addition, the kernel 441 may provide an interface that can control or manage system resources by accessing individual components of the electronic device 401 in the middleware 443, API 445, or application program 447.

The middleware 443, for example, can perform an intermediary role so that the API 445 or the application program 447 can communicate with the kernel 441 to exchange data.

In addition, the middleware 443 can process one or more task requests received from the application program 447 according to the priority order. For example, middleware 443 may prioritize the use of system resources (e.g., bus 410, processor 420, or memory 430, etc.) of electronic device 401 in at least one of application programs 447. For example, the middleware 443 can perform the scheduling or load balancing of the one or more task requests by processing the one or more task requests according to the priority assigned to the at least one task.

The API 445 is an interface for the application 447 to control the functions provided by the kernel 441 or the middleware 443 and includes at least one interface for file control, window control, image processing, Or functions (e.g., commands).

The input / output interface 450 may serve as an interface by which commands or data input from, for example, a user or other external device can be transferred to another component (s) of the electronic device 401. Output interface 450 may output commands or data received from other component (s) of electronic device 401 to a user or other external device.

The display 460 may be, for example, a liquid crystal display (LCD), a light-emitting diode (LED) display, an organic light emitting diode (OLED) microelectromechanical systems (MEMS) displays, or electronic paper displays. Display 460 may display various content (e.g., text, images, video, icons, symbols, etc.) to a user, for example. Display 460 may include a touch screen and may receive touch, gesture, proximity, or hovering input using, for example, an electronic pen or a portion of the user's body.

The communication interface 470 may establish communication between, for example, the electronic device 401 and an external device (e.g., the first external electronic device 402, the second external electronic device 404, or the server 406). For example, the communication interface 470 may be connected to the network 462 via wireless communication or wired communication to communicate with the external device (e.g., the second external electronic device 404 or the server 406).

Wireless communication is, for example, a cellular communication protocol such as Long-Term Evolution (LTE), LTE-Advanced (LTE-A), Code Division Multiple Access (CDMA), Wideband CDMA (WCDMA) Telecommunications System), WiBro (Wireless Broadband), or Global System for Mobile Communications (GSM). The wireless communication may also include, for example, local communication 464. The local area communication 464 may include at least one of, for example, Wireless Fidelity (Wi-Fi), Bluetooth, Near Field Communication (NFC), magnetic stripe transmission (MST)

The MST generates a pulse according to the transmission data using an electromagnetic signal, and the pulse can generate a magnetic field signal. The electronic device 401 transmits the magnetic field signal to a point of sale (POS), the POS uses the MST reader to detect the magnetic field signal, and converts the detected magnetic field signal into an electric signal can do.

The GNSS may be implemented by a GPS (Global Positioning System), Glonass (Global Navigation Satellite System), Beidou Navigation Satellite System (Beidou), or Galileo (European Global Satellite-based navigation system) Or the like. Hereinafter, in this document, "GPS" can be interchangeably used with "GNSS ". The wired communication may include at least one of, for example, a universal serial bus (USB), a high definition multimedia interface (HDMI), a recommended standard 232 (RS-232) or a plain old telephone service (POTS). The network 462 may include at least one of a telecommunications network, e.g., a computer network (e.g., a LAN or WAN), the Internet, or a telephone network.

Each of the first and second external electronic devices 402, 404 may be the same or a different kind of device as the electronic device 401. According to one embodiment, the server 406 may include one or more groups of servers. According to various embodiments, all or a portion of the operations performed on the electronic device 401 may be performed on one or more other electronic devices (e.g., electronic device 402, 404, or server 406). According to one embodiment, in the event that the electronic device 401 has to perform some function or service automatically or upon request, the electronic device 401 may perform at least some of its functions (E.g., electronic device 402, 404, or server 406). Other electronic devices (e. G., Electronic device 402, 404, or server 406) may execute the requested function or additional function and communicate the result to electronic device 401. [ The electronic device 401 can directly or additionally process the received result to provide the requested function or service. For this purpose, for example, cloud computing, distributed computing, or client-server computing technology may be used.

5 is a flowchart showing a communication collision avoiding method of an electronic device according to an embodiment of the present invention.

The flowchart shown in FIG. 5 may be configured with operations that are processed in the electronic device 301 shown in FIG. Therefore, the contents described with respect to the electronic device 301 with reference to Fig. 3 can be applied to the flowchart shown in Fig. 5, even if omitted from the following description.

Referring to FIG. 5, at operation 510, the electronic device 301 may generate a signal to be transmitted to the relay device 302. The signal can be generated in packet form.

At operation 520, the electronic device 301 may determine whether the generated signal is transmittable. The electronic device 301 can judge whether or not the transmission is possible by judging the channel state in which the signal is transmitted. For example, the electronic device 301 can determine that signal transmission is possible when the channel state is idle. The electronic device 301 can determine the channel state by, for example, the CCA method. If the channel state is a congested state, the electronic device 301 may repeat operation 520.

At operation 530, the electronic device 301 may transmit a signal to the relay device 302. The electronic device 301 can transmit signals wirelessly. The electronic device 301 may send a signal to the relay device 302 via, for example, an 802.11 communication module, in which case the relay device 302 may be an access point. The electronic device 301 can transmit signals, for example, to the IEEE 802.11ax standard.

At operation 540, the electronic device 301 may receive an ACK in response to the transmission from the relay device 302. The electronic device 301 can confirm that the signal was successfully transmitted by receiving the ACK from the relay device 302. [ The electronic device 301 may not receive an ACK if the signal was not successfully transmitted. The electronic device 301 may receive an ACK with an error (e.g., a false FCS) if the signal was not successfully transmitted.

At operation 550, the electronic device 301 may change parameters that determine the signal receiving area based on the received ACK. The electronic device 301 may change the parameter so that the signal receiving area is increased or decreased depending on whether or not the ACK was successfully received. The operation of changing the parameters will be described in detail below with reference to Figs. 6 and 7. Fig.

After the parameter is changed in operation 550, if the electronic device 301 again generates a signal and determines the channel condition for transmitting the signal, the electronic device 301 may determine that the other electronic devices in the increased or reduced signal receiving area Based on a signal received from the base station. As described above, the electronic device 301 can obtain an appropriate communication opportunity by adjusting the parameter that determines the signal receiving area in accordance with the ACK indicating whether or not the signal was successfully transmitted.

6 is a flowchart showing a communication collision avoiding method of an electronic device according to another embodiment of the present invention. For convenience of description, a duplicate description of the operation described with reference to FIG. 5 is omitted.

The flowchart shown in FIG. 6 may be configured with operations that are processed in the electronic device 301 shown in FIG. Therefore, the contents described with respect to the electronic device 301 with reference to Fig. 3 can be applied to the flowchart shown in Fig. 6, even if omitted from the following description.

Referring to FIG. 6, at operation 610, the electronic device 301 may transmit a signal to the relay device 302.

At operation 620, the electronic device 301 may receive an ACK in response to the transmission from the relay device 302.

At operation 630, the electronic device 301 may determine whether an ACK has been successfully received. The electronic device 301 may determine that a signal was successfully transmitted when an ACK is received.

The electronic device 301 can determine that the ACK is failed if no ACK is received for the specified time. In addition, the electronic device 301 can determine that the ACK is failed if it receives an ACK with an error (e.g., a false FCS). The electronic device 301 may determine that the signal was not successfully transmitted if the ACK is determined to have failed.

If the ACK is successfully received, at operation 641, the electronic device 301 may increment an ACK success counter that counts ACK success. The ACK success counter is a variable that increases by 1 each time ACK succeeds. For example, the electronic device 301 may change the ACK success counter from 0 to 1 upon the first successful ACK and change the ACK success counter from 1 to 2 upon successful ACK again. In addition, the electronic device 301 may initiate an ACK failure counter that counts an ACK failure. The ACK failure counter is a variable that increases by 1 for every ACK failure. For example, when the ACK succeeds when the ACK success counter is 0 and the ACK failure counter is 2, the electronic device 301 can change the ACK success counter to 1 and change the ACK failure counter to 0. [ The initialization of the ACK failure counter can be made selectively.

At operation 651, the electronic device 301 may determine whether the ACK success counter exceeds a specified value. For example, the electronic device 301 may perform an operation 661 if the ACK success counter exceeds the specified value s and perform operations 610, 620 and 630 again without changing the parameter if the specified value s is not exceeded .

At operation 661, the electronic device 301 may change the parameters so that the signal receiving area is increased. That is, the electronic device 301 may change the parameters so that the signal receiving area is increased when ACK success is continuously repeated over the designated number of times through the operations 641, 651, and 661. According to one embodiment, the electronic device 301 may first set a threshold value, and then increase the signal receiving area based on the set threshold value. For example, if the electronic device 301 determines the channel condition in the CCA manner, the electronic device 301 may reduce the CCA threshold. The electronic device 301 may receive signals from other electronic devices within the signal receiving area that are increased in accordance with the CCA threshold to determine the channel condition.

If, on the other hand, the ACK is determined to have failed, at operation 642, the electronic device 301 may increment the ACK failure counter that counts an ACK failure. For example, the electronic device 301 may change the ACK failure counter from 0 to 1 upon the first ACK failure and change the ACK failure counter from 1 to 2 on the failure of the ACK again. In addition, the electronic device 301 may initialize an ACK success counter that counts an ACK success. For example, if the ACK fails when the ACK failure counter is 0 and the ACK success counter is 3, the electronic device 301 may change the ACK failure counter to 1 and change the ACK success counter to 0. Initialization of the ACK success counter may optionally be performed.

At operation 652, the electronic device 301 may determine whether the ACK failure counter exceeds a specified value. For example, the electronic device 301 may perform an operation 662 if the ACK failure counter exceeds the specified value f, and perform operations 610, 620 and 630 again without changing the parameter if the specified value f is not exceeded .

At operation 662, the electronic device 301 may change the parameters so that the signal receiving area is reduced. That is, the electronic device 301 may change the parameters so that the signal receiving area is reduced if the ACK failure is continuously repeated over the specified number of times via operations 642, 652, and 662. [ According to one embodiment, the electronic device 301 may first set a threshold value and then reduce the signal receiving area based on the set threshold value. For example, if the electronic device 301 determines the channel condition in the CCA manner, the electronic device 301 may increase the CCA threshold. The electronic device 301 may receive signals from other electronic devices within the reduced signal receiving area in accordance with the CCA threshold to determine the channel condition. By changing the parameters so that the signal receiving area is reduced when the ACK failure is repeated continuously, the electronic device 301 may not be in competition with other electronic devices contained in different BBS environments. Thus, the electronic device 301 can acquire more communication opportunities before the parameters are changed.

7 is a flowchart showing a communication collision avoiding method of an electronic device according to another embodiment of the present invention. For convenience of description, a duplicate description of the operations described with reference to Figs. 5 and 6 will be omitted.

The flowchart shown in FIG. 7 may be configured with operations that are processed in the electronic device 301 shown in FIG. Therefore, the contents described with respect to the electronic device 301 with reference to Fig. 3 can be applied to the flowchart shown in Fig. 7, even if omitted from the following description.

Referring to Fig. 7, at operation 710, the electronic device 301 may transmit a signal to the relay device 302. [

At operation 720, the electronic device 301 may receive an ACK in response to the transmission from the relay device 302.

At operation 730, the electronic device 301 may determine whether an ACK has been successfully received.

If the ACK is successfully received, at operation 741, the electronic device 301 may increment an ACK success counter that counts ACK success.

At operation 751, the electronic device 301 may determine whether the ACK success counter exceeds a specified value.

At operation 761, the electronic device 301 may change the parameters so that the signal receiving area is increased.

If, on the other hand, the ACK is determined to fail, at operation 742, the electronic device 301 may increase the ACK failure counter to count an ACK failure.

At operation 752, the electronic device 301 may determine whether the ACK failure counter exceeds a specified value.

At operation 762, the electronic device 301 may determine the channel condition. The channel state may change while the operations 710, 720, 730, 742, and 752 are performed, so that the electronic device 301 can determine the channel state again. The communication opportunity of other electronic devices competing in the same BBS environment as the electronic device 301 may be lost by changing parameters such that the signal receiving area of the electronic device 301 is reduced when the channel is idle. Accordingly, the electronic device 301 can perform operation 772 or 782 only when the channel is in a congested state after determining the channel condition. The electronic device 301 can determine the channel state in the same manner as the operation 520 described with reference to Fig. The electronic device 301 may again perform operations 710, 720 and 730 without changing the parameters if the channel is idle. Operation 762 may optionally be performed.

At operation 772, the electronic device 301 may determine whether the transmission rate at which the signal is transmitted exceeds a specified value. Changing the parameters such that the signal receiving area of the electronic device 301 is reduced when the transmission rate is low, i.e., when the channel environment is poor, communication opportunities of other electronic devices contained in the same BBS environment as the electronic device 301 Can be lost. Thus, the electronic device 301 can perform the operation 782 only if the transmission rate is higher than the specified value. According to one embodiment, the electronic device 301 can determine the transmission rate based on the MCS value of the signal received from the relay device 302 to the electronic device 301. [ For example, electronic device 301 may perform act 782 only if the MCS value is greater than a specified value. The electronic device 301 may perform operations 710, 720 and 730 again without changing the parameters if the transmission rate is lower than the specified value. Operation 772 may optionally be performed.

At operation 782, the electronic device 301 may change the parameters so that the signal receiving area is reduced.

8 is a graph showing the relationship between the number of electronic devices and the throughput according to an embodiment of the present invention.

The simulation environment in which the results shown in FIG. 8 are derived is as follows.

Nine access points were installed at uniform intervals, and the number of electronic devices connected to each of the access points was changed from 1 to 5, and the simulation was performed. In order to realize a high-density superposition environment, each BSS is arranged so as to overlap with another BSS. The simulation was performed through Network Simulator 3 (NS-3).

For the simulation, we set the parameters into three groups as shown below.

Table 1 is a table describing the physical layer (PHY) parameters used in the simulation.

parameter value Wireless standard Infrastructure Mode
802.11a / b / g Frequency band 2.4 GHz Channel width 20MHz Propagation delay model Constant speed propagation delay Propagation loss model Three log distance model Packet size 1024 bytes Initial CCA Threshold -99 dBm

Table 2 lists the media access control (MAC) parameters used in the simulation.

parameter value Access protocol DCF RTS / CTS Off Connection status 100% STA connected to AP QoS Enabled

Table 3 shows the simulation parameters used in the simulation.

parameter value Number of STAs 1 to 45 Number of BSS 9 Simulation time 20 seconds per electronic device Distance between electronic devices  [0,10] meter

Three log distance propagation loss model is used to implement the environment similar to building. The three log distance propagation loss model is basically the same as the log distance propagation loss model, but it is a model that applies different formulas according to the stages divided into four stages. An exemplary equation for representing the three log distance propagation loss model is:

[Equation 1]

The graph (a) of FIG. 8 shows the relationship between the number and the throughput (embodiments) of the electronic device according to an embodiment of the present invention in the 802.11a protocol environment and the number and the throughput of the electronic devices using the fixed CCA threshold Yes).

The graph (b) of FIG. 8 shows the relationship between the number and the throughput (embodiments) of the electronic device according to an embodiment of the present invention in the 802.11b protocol environment and the number and the throughput of the electronic devices using the fixed CCA threshold Yes).

The graph (c) of FIG. 8 shows the relationship between the number and the throughput (embodiments) of the electronic device according to an embodiment of the present invention in the 802.11g protocol environment and the number and the throughput of the electronic devices using the fixed CCA threshold Yes).

Referring to graphs (a), (b), and (c), the throughput of the embodiment, regardless of the protocol environment, is approximately twice as large as the throughput of the comparative example. In addition, although the throughput is reduced due to the transfer collision between the electronic devices as the number of electronic devices increases, the throughput of the embodiment is maintained at about twice the throughput of the comparative example.

Through the above-described simulation, the effect of the present invention can be verified that the overall throughput can be improved by changing the CCA threshold value according to an embodiment of the present invention.

9 shows a block diagram 900 of an electronic device 901 according to various embodiments.

Referring to FIG. 9, the electronic device 901 may include all or a portion of the electronic device 401 shown in FIG. 4, for example. The electronic device 901 includes one or more processors (e.g., AP) 910, a communication module 920, a subscriber identification module 924, a memory 930, a sensor module 940, an input device 950, a display 960, an interface 970, an audio module 980, a camera module 991, A module 995, a battery 996, an indicator 997, and a motor 998.

The processor 910 may, for example, drive an operating system or an application program to control a number of hardware or software components coupled to the processor 910, and may perform various data processing and operations. The processor 910 may be implemented with, for example, a system on chip (SoC). According to one embodiment, the processor 910 may further include a graphics processing unit (GPU) and / or an image signal processor. Processor 910 may include at least some of the components shown in FIG. 9 (e.g., cellular module 921). Processor 910 may load and process instructions or data received from at least one of the other components (e.g., non-volatile memory) into volatile memory and store the various data in non-volatile memory.

The communication module 920 may have the same or similar configuration as the communication interface 470 of FIG. The communication module 920 includes, for example, a cellular module 921, a Wi-Fi module 922, a Bluetooth module 923, a GNSS module 924 (e.g., a GPS module, a Glonass module, a Beidou module or a Galileo module), an NFC module 925, an MST module 926 , And a radio frequency (RF) module 927.

The cellular module 921 may provide voice, video, text, or Internet services, for example, over a communication network. According to one embodiment, the cellular module 921 may utilize a subscriber identity module (e.g., a SIM card) 929 to perform the identification and authentication of the electronic device 901 within the communication network. According to one embodiment, the cellular module 921 may perform at least some of the functions that the processor 910 may provide. According to one embodiment, the cellular module 921 may include a communications processor (CP).

Each of the Wi-Fi module 922, the Bluetooth module 923, the GNSS module 924, the NFC module 925, or the MST module 926 may include a processor for processing data transmitted and received through the corresponding module, for example. At least some (e.g., two or more) of the cellular module 921, the Wi-Fi module 922, the Bluetooth module 923, the GNSS module 924, the NFC module 925, or the MST module 926, Or an IC package.

The RF module 927 can, for example, send and receive communication signals (e.g., RF signals). RF module 927 may include, for example, a transceiver, a power amplifier module (PAM), a frequency filter, a low noise amplifier (LNA), or an antenna. According to another embodiment, at least one of the cellular module 921, the Wi-Fi module 922, the Bluetooth module 923, the GNSS module 924, the NFC module 925, and the MST module 926 can transmit and receive RF signals through separate RF modules.

The subscriber identity module 929 may include, for example, a card containing a subscriber identity module and / or an embedded SIM, and may include unique identification information (e.g., an integrated circuit card identifier (ICCID) (E.g., international mobile subscriber identity (IMSI)).

Memory 930 (e.g., memory 430) may include, for example, internal memory 932 or external memory 934. The internal memory 932 may be a volatile memory such as a dynamic RAM (DRAM), a static random access memory (SRAM), or a synchronous dynamic RAM (SDRAM), a non-volatile memory such as an OTPROM one time programmable ROM), programmable ROM (PROM), erasable and programmable ROM (EPROM), electrically erasable and programmable ROM (EEPROM), mask ROM, flash ROM, flash memory (e.g., NAND flash, or NOR flash), a hard drive, or a solid state drive (SSD).

The external memory 934 may be a flash drive, for example, a compact flash (CF), a secure digital (SD), a micro-SD, a mini-SD, an extreme digital (xD), a multiMediaCard (MMC) a memory stick, and the like. The external memory 934 may be functionally and / or physically connected to the electronic device 901 through various interfaces.

The security module 936 is a module including a storage space having a relatively higher security level than the memory 930, and may be a circuit that ensures secure data storage and a protected execution environment. The security module 936 may be implemented as a separate circuit and may include a separate processor. The security module 936 may include, for example, an embedded secure element (eSE) that resides in a removable smart chip, a secure digital (SD) card, or embedded within a fixed chip of the electronic device 901 . In addition, the security module 936 may be run on an operating system different from the operating system (OS) of the electronic device 201. For example, the security module 936 may operate based on a Java card open platform (JCOP) operating system.

The sensor module 940 may, for example, measure a physical quantity or sense the operating state of the electronic device 901 to convert the measured or sensed information into an electrical signal. The sensor module 940 includes, for example, a gesture sensor 940A, a gyro sensor 940B, an air pressure sensor 940C, a magnetic sensor 940D, an acceleration sensor 940E, a grip sensor 940F, a proximity sensor 940G, a color sensor 940H An on / humidity sensor 940J, an illuminance sensor 940K, or an ultraviolet (UV) sensor 940M. Additionally or alternatively, the sensor module 940 may be, for example, an E-nose sensor, an EMG (electromyography) sensor, an EEG (electroencephalogram) sensor, an ECG (electrocardiogram) sensor, an IR And / or a fingerprint sensor. The sensor module 940 may further include a control circuit for controlling at least one or more sensors belonging to the sensor module 940. In some embodiments, the electronic device 901 may further include a processor configured to control the sensor module 940, either as part of the processor 910 or separately, to control the sensor module 940 while the processor 910 is in a sleep state .

The input device 950 may include, for example, a touch panel 952, a (digital) pen sensor 954, a key 956, or an ultrasonic input device 958. As the touch panel 952, at least one of an electrostatic type, a pressure sensitive type, an infrared type, and an ultrasonic type can be used, for example. Further, the touch panel 952 may further include a control circuit. The touch panel 952 may further include a tactile layer to provide a tactile response to the user.

 (Digital) pen sensor 954 may be part of, for example, a touch panel or may include a separate sheet of identification. Key 956 may include, for example, a physical button, an optical key, or a keypad. The ultrasonic input device 958 can sense the ultrasonic wave generated by the input tool through the microphone (e.g., the microphone 988) and confirm the data corresponding to the ultrasonic wave detected.

Display 960 (e.g., display 460) may include a panel 962, a hologram device 964, or a projector 966. Panel 962 may include the same or similar configuration as display 460 of FIG. The panel 962 can be embodied, for example, flexible, transparent, or wearable. The panel 962 may be composed of a touch panel 952 and one module. The hologram device 964 can display a stereoscopic image in the air using the interference of light. The projector 966 can display images by projecting light onto the screen. The screen may, for example, be located inside or outside the electronic device 901. According to one embodiment, the display 960 may further include control circuitry for controlling the panel 962, the hologram device 964, or the projector 966.

The interface 970 may include, for example, an HDMI 972, a USB 974, an optical interface 976, or a D-sub (D-subminiature) 978. The interface 970 may, for example, be included in the communication interface 470 shown in FIG. Additionally or alternatively, the interface 970 may include, for example, a mobile high-definition link (MHL) interface, an SD card / MMC interface, or an infrared data association (IrDA) interface.

The audio module 980 can, for example, bidirectionally convert sound and electrical signals. At least some components of the audio module 980 may be included, for example, in the input / output interface 450 shown in FIG. The audio module 980 can process sound information input or output through, for example, a speaker 982, a receiver 984, an earphone 986, a microphone 988, or the like.

The camera module 991 is, for example, a device capable of capturing still images and moving images, and according to one embodiment, one or more image sensors (e.g., a front sensor or a rear sensor), a lens, an image signal processor And may include a flash (e.g., LED or xenon lamp).

The power management module 995 can manage the power of the electronic device 901, for example. According to one embodiment, the power management module 995 may include a power management integrated circuit (PMIC), a charger integrated circuit ("IC"), or a battery or fuel gauge. The PMIC may have a wired and / or wireless charging scheme. The wireless charging scheme may include, for example, a magnetic resonance scheme, a magnetic induction scheme, or an electromagnetic wave scheme, and may further include an additional circuit for wireless charging, for example, a coil loop, a resonant circuit, have. The battery gauge can measure, for example, the remaining amount of the battery 996, the voltage during charging, the current, or the temperature. The battery 996 may include, for example, a rechargeable battery and / or a solar battery.

An indicator 997 may indicate a particular state of the electronic device 901 or a portion thereof (e.g., processor 910), such as a boot state, a message state, or a state of charge. The motor 998 can convert an electrical signal into mechanical vibration, and can generate vibration, haptic effects, and the like. Although not shown, the electronic device 901 may include a processing unit (e.g., a GPU) for mobile TV support. The processing device for mobile TV support can process media data conforming to standards such as DMB (Digital Multimedia Broadcasting), DVB (Digital Video Broadcasting), or MediaFLO ( ^TM ).

Each of the components described in this document may be composed of one or more components, and the name of the component may be changed according to the type of the electronic device. In various embodiments, the electronic device may comprise at least one of the components described herein, some components may be omitted, or may further include additional other components. In addition, some of the components of the electronic device according to various embodiments may be combined into one entity, so that the functions of the components before being combined can be performed in the same manner.

10 shows a block diagram of a program module according to various embodiments.

According to one embodiment, the program module 1010 (e.g., program 440) includes an operating system (OS) that controls resources associated with an electronic device (e.g., electronic device 401) Program 447). The operating system may be, for example, android, iOS, windows, symbian, tizen, or bada.

The program module 1010 may include a kernel 1020, a middleware 1030, an API 1060, and / or an application 1070. At least a portion of the program module 1010 may be preloaded on an electronic device or downloaded from an external electronic device (e.g., electronic device 402, 404, server 406, etc.).

The kernel 1020 (e.g., kernel 441) may include, for example, a system resource manager 1021 or a device driver 1023. The system resource manager 1021 can perform control, allocation, or recovery of system resources. According to one embodiment, the system resource manager 1021 may include a process management unit, a memory management unit, or a file system management unit. The device driver 1023 may include, for example, a display driver, a camera driver, a Bluetooth driver, a shared memory driver, a USB driver, a keypad driver, a Wi-Fi driver, an audio driver, or an inter-process communication .

The middleware 1030 can provide various functions to the application 1070 through the API 1060, for example, to provide functions that are commonly required by the application 1070, or to allow the application 1070 to efficiently use limited system resources within the electronic device have. According to one embodiment, the middleware 1030 (e.g., middleware 443) includes a runtime library 1035, an application manager 1041, a window manager 1042, a multimedia manager 1043, a resource manager 1044 A power manager 1045, a database manager 1046, a package manager 1047, a connectivity manager 1048, a notification manager 1049, a location manager 1050, A graphic manager 1051, a security manager 1052, or a payment manager 1054. [

The runtime library 1035 may include, for example, a library module used by the compiler to add new functionality via a programming language while the application 1070 is running. The runtime library 1035 can perform input / output management, memory management, or functions for arithmetic functions.

The application manager 1041 can manage the life cycle of at least one of the applications 1070, for example. The window manager 1042 can manage GUI resources used on the screen. The multimedia manager 1043 can identify the format required for playback of various media files and can encode or decode the media file using a codec suitable for the format. The resource manager 1044 can manage resources such as source code, memory or storage space of at least one of the applications 1070.

The power manager 1045 operates in conjunction with, for example, a basic input / output system (BIOS) or the like to manage a battery or a power source and provide power information necessary for the operation of the electronic device. The database manager 1046 may create, retrieve, or modify a database to be used in at least one of the applications 1070. The package manager 1047 can manage installation or update of an application distributed in the form of a package file.

The connection manager 1048 may manage wireless connections, such as, for example, Wi-Fi or Bluetooth. The notification manager 1049 may display or notify events such as arrival messages, appointments, proximity notifications, etc. in a manner that does not interfere with the user. The location manager 1050 can manage the location information of the electronic device. The graphic manager 1051 can manage the graphical effect to be provided to the user or a related user interface. The security manager 1052 can provide all security functions necessary for system security or user authentication. According to one embodiment, when the electronic device (e.g., electronic device 401) includes a telephone function, the middleware 1030 may further include a telephony manager for managing the voice or video call function of the electronic device.

Middleware 1030 may include a middleware module that forms a combination of various functions of the above-described components. The middleware 1030 can provide a module specialized for each type of operating system to provide differentiated functions. In addition, the middleware 1030 can dynamically delete some existing components or add new ones.

API 1060 (e.g., API 445) is a collection of API programming functions, for example, and may be provided in different configurations depending on the operating system. For example, for Android or iOS, you can provide one API set per platform, and for tizen, you can provide more than two API sets per platform.

An application 1070 (e.g., an application program 447) may include, for example, a home 1071, a dialer 1072, an SMS / MMS 1073, an instant message 1074, a browser 1075, a camera 1076, an alarm 1077, a contact 1078, 1080, a calendar 1081, a media player 1082, an album 1083, or a clock 1084, a health care (e.g., to measure exercise or blood glucose), or environmental information And the like) capable of performing the functions of the < / RTI >

According to one embodiment, an application 1070 is an application that supports the exchange of information between an electronic device (e.g., electronic device 401) and an external electronic device (e.g., electronic device 402, 404) "). The information exchange application may include, for example, a notification relay application for communicating specific information to an external electronic device, or a device management application for managing an external electronic device.

For example, the notification delivery application may send notification information generated by other applications (e.g., SMS / MMS applications, email applications, healthcare applications, or environmental information applications) of the electronic device to external electronic devices 404). ≪ / RTI > Further, the notification delivery application can receive notification information from, for example, an external electronic device and provide it to the user.

The device management application may be configured to perform at least one function (e.g., turn-on / turn-off) of an external electronic device itself (or some component) (Eg, install, delete, or update) services provided by an external electronic device or external electronic device (eg, call service or message service) can do.

According to one embodiment, the application 1070 may include an application (e.g., a healthcare application in a mobile medical device) that is designated according to attributes of an external electronic device (e.g., electronic device 402, 404). According to one embodiment, application 1070 may include an application received from an external electronic device (e.g., server 406 or electronic device 402, 404). According to one embodiment, application 1070 may include a preloaded application or a third party application downloadable from a server. The names of the components of the program module 1010 according to the illustrated embodiment may vary depending on the type of the operating system.

According to various embodiments, at least some of the program modules 1010 may be implemented in software, firmware, hardware, or a combination of at least two of them. At least some of the program modules 1010 may be implemented (e.g., executed) by, for example, a processor (e.g., processor 210). At least some of the program modules 1010 may include, for example, modules, programs, routines, sets of instructions or processes, etc., to perform one or more functions.

As used in this document, the term "module" may refer to a unit comprising, for example, one or a combination of two or more of hardware, software or firmware. A "module" may be interchangeably used with terms such as, for example, unit, logic, logical block, component, or circuit. A "module" may be a minimum unit or a portion of an integrally constructed component. A "module" may be a minimum unit or a portion thereof that performs one or more functions. "Modules" may be implemented either mechanically or electronically. For example, a "module" may be an application-specific integrated circuit (ASIC) chip, field-programmable gate arrays (FPGAs) or programmable-logic devices And may include at least one.

At least a portion of a device (e.g., modules or functions thereof) or a method (e.g., operations) according to various embodiments may include, for example, computer-readable storage media in the form of program modules, As shown in FIG. When the instruction is executed by a processor (e.g., processor 420), the one or more processors may perform a function corresponding to the instruction. The computer readable storage medium may be, for example, a memory 430.

The computer-readable recording medium may be a hard disk, a floppy disk, a magnetic media such as a magnetic tape, an optical media such as a CD-ROM, a DVD (Digital Versatile Disc) May include magneto-optical media (e.g., a floppy disk), a hardware device (e.g., ROM, RAM, or flash memory, etc.) Etc. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the various embodiments. And vice versa.

An instruction stored on a computer recording medium according to an embodiment of the present invention includes an operation of transmitting a signal, receiving an ACK in response to a transmission, and changing an parameter for determining a signal receiving area based on an ACK for collision avoidance . ≪ / RTI > An electronic device according to an embodiment of the present invention may be configured to operate as one or more software modules to perform operations in accordance with the instructions.

Modules or program modules according to various embodiments may include at least one or more of the elements described above, some of which may be omitted, or may further include additional other elements. Operations performed by modules, program modules, or other components in accordance with various embodiments may be performed in a sequential, parallel, iterative, or heuristic manner. Also, some operations may be performed in a different order, omitted, or other operations may be added.

And the embodiments disclosed in this document are provided for the explanation and understanding of the disclosed technical contents, and do not limit the scope of the present invention. Accordingly, the scope of this document should be interpreted to include all modifications based on the technical idea of the present invention or various other embodiments.

Claims (20)

A communication interface for transmitting a signal and receiving an ACK in response to the transmission; And
And a processor for determining a signal receiving area for collision avoidance,
Wherein the processor is configured to change a parameter that determines the signal receiving area based on the ACK. The method according to claim 1,
The processor comprising:
To set a threshold based on the ACK and to determine the signal receiving area based on the threshold. The method of claim 2,
Wherein the threshold is a Clear Channel Assessment threshold. The method of claim 2,
When the threshold increases, the signal receiving area decreases,
And the signal receiving area is set to increase when the threshold decreases. The method according to claim 1,
The processor comprising:
And to change the parameter to increase the signal receiving area if the ACK is successfully received more than a specified number of times. The method according to claim 1,
The processor comprising:
If the ACK is not received or an ACK is received with an error,
And to change the parameter to reduce the signal receiving area if the ACK fails more than a specified number of times. The method of claim 6,
The processor comprising:
If the ACK fails more than the specified number of times,
Determining a channel state through the communication interface,
If the channel state is a busy state,
And to change the parameter to reduce the signal receiving area. The method of claim 6,
The processor comprising:
If the ACK fails more than the specified number of times,
Determining a channel state through the communication interface,
If the channel state is an idle state,
The parameter being set to maintain the parameter. The method of claim 6,
The processor comprising:
When the transmission rate at which the signal is transmitted from the communication interface is lower than a predetermined value,
The parameter being set to maintain the parameter. The method of claim 9,
The processor comprising:
If a modulation and coding scheme (MCS) value corresponding to the transmission rate is lower than a predetermined value,
The parameter being set to maintain the parameter. The method according to claim 1,
Wherein the communication interface is an 802.11 communication module. The method according to claim 1,
The processor comprising:
When the increase of the signal receiving area is repeated, or when the decrease of the signal receiving area is repeated,
And to change the signal receiving area by increasing a change width of the signal receiving area. A communication collision avoiding method for an electronic device,
Transmitting a signal and receiving an ACK in response to the transmission; And
And changing a parameter that determines a signal receiving area based on the ACK for collision avoidance. 14. The method of claim 13,
The operation of changing the parameter includes:
And changing the parameter to increase the signal receiving area if the ACK is successfully received more than a specified number of times. 14. The method of claim 13,
The operation of changing the parameter includes:
If the ACK is not received or an ACK is received with an error,
And changing the parameter to reduce the signal receiving area if the ACK fails more than a specified number of times. 16. The method of claim 15,
The operation of changing the parameter includes:
If the ACK fails more than the designated number of times, determines a channel state through the communication interface,
And changing the parameter to reduce the signal receiving region if the channel state is a busy state. 16. The method of claim 15,
The operation of changing the parameter includes:
When the transmission rate at which the signal is transmitted from the communication interface is higher than a predetermined value,
And changing the parameter to reduce the signal receiving area. 14. The method of claim 13,
The operation of changing the parameter includes:
Setting a threshold based on the ACK; And
And determining the signal receiving region based on the threshold. 14. The method of claim 13,
The operation of changing the parameter includes:
When the increase of the signal receiving area is repeated, or when the decrease of the signal receiving area is repeated,
And changing the parameter to increase the variation width of the signal receiving area. A computer-readable recording medium having computer-readable instructions executed by at least one processor,
Wherein the command comprises:
Transmitting a signal and receiving an ACK in response to the transmission; And
And to change the signal receiving area based on the ACK for collision avoidance.

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