KR20240010370A - Electronic devices and spatial reuse control methods - Google Patents

Abstract

An electronic device according to an embodiment includes one or more wireless communication modules configured to transmit and receive wireless signals, one or more processors operatively connected to the wireless communication modules, and a device electrically connected to the processor and executable by the processor. It may include memory for storing instructions. When the instructions are executed by the processor, the processor may determine whether a SAR backoff limit exists for the transmission power of the electronic device. The processor may set a spatial reuse parameter associated with the transmit power based on the SAR backoff limit. The processor may perform communication based on the spatial reuse parameter. Other embodiments may be possible.

Description

Electronic devices and spatial reuse control methods {ELECTRONIC DEVICES AND SPATIAL REUSE CONTROL METHODS}

Various embodiments relate to electronic devices and spatial reuse control methods.

With the advent of electronic devices such as smartphones, tablet PCs, or laptops, the demand for high-speed wireless connections has grown explosively. Thanks to this trend and the increasing demand for high-speed wireless connections, the IEEE 802.11 wireless communication standard is firmly established as a representative and general-purpose high-speed wireless communication standard in the IT (information technology) industry. Early wireless LAN technology developed around 1997 could support transmission speeds of up to 1 to 2 Mbps. Since then, as wireless LAN technology has steadily developed based on the demand for faster wireless connections, new wireless LAN technologies that improve transmission speeds, such as IEEE 802.11n, 802.11ac, or 802.11ax, have been steadily developed. Currently, the latest standard, IEEE 802.11ax, has a maximum transmission rate of several Gbps.

Currently, wireless LANs encompass not only private places such as homes, but also various public places such as offices, airports, stadiums, or stations, providing high-speed wireless connections to users throughout society. Accordingly, wireless LAN has had a significant impact on people's lifestyle or culture, and wireless LAN has now become a lifestyle in modern people's lives.

An electronic device according to an embodiment includes one or more wireless communication modules configured to transmit and receive wireless signals, one or more processors operatively connected to the wireless communication modules, and a device electrically connected to the processor and executable by the processor. It may include memory for storing instructions. When the instructions are executed by the processor, the processor may check whether a specific absorption rate (SAR) back off regulation value for the transmission power of the electronic device exists. The processor may set a spatial reuse parameter associated with the transmit power based on the SAR backoff limit. The processor may perform communication based on the spatial reuse parameter.

An electronic device according to an embodiment includes one or more wireless communication modules configured to transmit and receive wireless signals, one or more processors operatively connected to the wireless communication modules, and a device electrically connected to the processor and executable by the processor. It may include memory for storing instructions. When the instructions are executed by the processor, the processor may calculate an allocated energy budget for the time window based on a time average SAR (TAS) algorithm. The processor may set spatial reuse parameters associated with the transmission power of the electronic device based on the energy budget. The processor may perform communication during the time window based on the spatial reuse parameter.

A method of operating an electronic device according to an embodiment may include checking whether a SAR backoff limit value for transmission power of the electronic device exists. The method of operating the electronic device may include setting a spatial reuse parameter associated with the transmission power based on the SAR backoff limit value. The method of operating the electronic device may include performing communication based on the spatial reuse parameter.

Figure 1 shows an example of a wireless LAN system according to embodiments.
Figure 2 shows an example of a wireless LAN system according to an embodiment.
Figure 3 is a diagram for explaining a protocol for traffic transmission according to an embodiment.
FIGS. 4A and 4B are diagrams for explaining a SAR backoff protocol according to an embodiment.
Figures 5A to 5C are diagrams for explaining a spatial reuse protocol according to an embodiment.
FIG. 6 is a diagram illustrating a conflict between a spatial reuse protocol and a SAR backoff protocol according to an embodiment.
Figure 7 shows an example of a schematic block diagram of an STA according to an embodiment.
FIG. 8 is a diagram illustrating an example of an operation combining a SAR backoff protocol and a spatial reuse protocol, according to an embodiment.
FIGS. 9A to 9D are diagrams to explain an example of an operation combining a SAR backoff protocol and a spatial reuse protocol, according to an embodiment.
FIG. 10A is an example of a flowchart explaining a method of operating an STA according to an embodiment.
FIG. 10B is an example of a flowchart explaining a method of operating an STA according to an embodiment.
Figure 11 is a block diagram of an electronic device in a network environment, according to one embodiment.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. In the description with reference to the accompanying drawings, identical components will be assigned the same reference numerals regardless of the reference numerals, and overlapping descriptions thereof will be omitted.

Figure 1 shows an example of a wireless LAN system according to an embodiment.

Referring to FIG. 1, according to one embodiment, the wireless LAN system 10 uses an infrastructure mode in which an access point (AP) exists in the structure of a wireless LAN (WLAN) of IEEE (Institute of Electrical and Electronic Engineers) 802.11 ( It may indicate infrastructure mode. The wireless LAN system 10 may include one or more basic service sets (BSS) (eg, BSS1, BSS2). BSS (BSS1, BSS2) is an access point (AP) and a station (STA) (e.g., the electronic device 1101, electronic device 1102, and electronic device 1104 in FIG. 11) that can communicate with each other by synchronizing. It can mean a set. BSS1 may include AP1 and STA1, and BSS2 may include AP2, STA2, and STA3.

According to one embodiment, the wireless LAN system 10 includes at least one STA (STA1 to STA3), a plurality of APs (AP1, AP2) that provide distribution services, and a plurality of APs (AP1, AP2) It may include a distribution system 100 that connects. The distributed system 100 can connect a plurality of BSSs (BSS1, BSS2) to implement an extended service set (ESS), which is an extended service set. ESS can be used as a term to indicate a network formed by connecting multiple APs (AP1, AP2) through the distributed system 100. Multiple APs (AP1, AP2) included in one ESS may have the same service set identification (SSID).

According to one embodiment, STAs (STA1 to STA3) use medium access control (MAC) and physical layer for wireless media following the provisions of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard. It can be any functional medium that includes an interface. STAs (STA1 to STA3) can be used to include both APs and non-AP STAs (Non-AP stations). STAs (STA1~STA3) are electronic devices, mobile terminals, wireless devices, wireless transmit/receive units (WTRU), and user equipment (UE). , a mobile station (MS), a mobile subscriber unit, or simply a user.

Figure 2 shows an example of a wireless LAN system according to an embodiment.

Referring to FIG. 2, according to one embodiment, the wireless LAN system 20, unlike the wireless LAN system 10 of FIG. 1, has a wireless LAN (WLAN) structure of IEEE (Institute of Electrical and Electronic Engineers) 802.11. This may indicate an ad-hoc mode in which communication is performed by setting up a network between a plurality of STAs (STA1 to STA3) without an AP. The wireless LAN system 20 may include a BSS that operates in an ad-hoc mode, that is, an independent basic service set (IBSS).

According to one embodiment, because the IBSS does not include an AP, there may be no centralized management entity. In IBSS, STAs can be managed in a distributed manner. In IBSS, all STAs can be mobile STAs, and access to distributed systems is not allowed, so a self-contained network (or self-contained network) can be formed.

Figure 3 is a diagram for explaining an example of a link setup operation according to an embodiment.

Referring to FIG. 3, according to one embodiment, a link setup operation may be performed between devices (e.g., STA 301 and AP 401) to communicate with each other. For link setup, network discovery, authentication, establishment of association, and security setup operations may be performed. The link setup operation may be referred to as a session initiation operation or session setup operation. Additionally, the discovery, authentication, association, and security setting operations of the link setup operation may be collectively referred to as the association operation.

According to one embodiment, the network discovery operation may include operations 310 and 320. In operation 310, the STA 301 (e.g., the electronic device 1101, electronic device 1102, or electronic device 1104 in FIG. 11) sends a probe request frame to discover which AP exists. You can transmit and wait for a response to the probe request frame. The STA 301 may perform a scanning operation to access a network to find a network in which it can participate. The probe request frame may include information of the STA 301 (e.g., device name and/or address of the STA 301). The scanning operation in operation 310 may mean an active scanning operation. In operation 320, the AP 401 may transmit a probe response frame in response to the probe request frame to the STA 301 that transmitted the probe request frame. The probe response frame may include information about the AP 401 (eg, device name and/or network information of the AP 401). Although the network discovery operation is shown in FIG. 3 as being performed through active scanning, it is not necessarily limited to this, and when the STA 301 performs passive scanning, the transmission operation of the probe request frame may be omitted. The STA 301 performing passive scanning may receive the beacon frame transmitted by the AP 401 and perform the following subsequent procedures.

According to one embodiment, after the STA 301 discovers the network, an authentication operation including operations 330 and 340 may be performed. In operation 330, the STA 301 may transmit an authentication request frame to the AP 401. In operation 340, the AP 401 may determine whether to allow authentication for the corresponding STA 301 based on information included in the authentication request frame. The AP 401 may provide the result of the authentication process to the STA 301 through an authentication response frame. The authentication frame used for authentication request/response may correspond to a management frame.

According to one embodiment, the authentication frame includes an authentication algorithm number, an authentication transaction sequence number, a status code, a challenge text, a robust security network (RSN), Alternatively, it may include information about a finite cyclic group.

According to one embodiment, after the STA 301 is successfully authenticated, an association operation including operations 350 and 360 may be performed. In operation 350, the STA 301 may transmit an association request frame to the AP 401. In operation 360, the AP 401 may transmit an association response frame to the STA 301 in response to the association request frame.

According to one embodiment, the association request frame and/or the association response frame may include information related to various capabilities. For example, the connection request frame contains information related to various capabilities, beacon listen interval, service set identifier (SSID), supported rates, supported channels, RSN, and mobility domain. , may include information about supported operating classes, TIM broadcast request (traffic indication map broadcast request), and/or interworking service capabilities. For example, the connection response frame may contain information related to various capabilities, status code, association ID (AID), supported rate, enhanced distributed channel access (EDCA) parameter set, received channel power indicator (RCPI), and received signal to noise (RSNI). indicator), mobility domain, timeout interval (association comeback time), overlapping BSS scan parameters, TIM broadcast response, and/or QoS map.

According to one embodiment, after the STA 301 is successfully associated with the network, a security setup operation including operations 370 and 380 may be performed. Security setup operations may be performed through RSNA (robust security network association) request/response. For example, the security setup operation may include private key setup through 4-way handshaking through an extensible authentication protocol over LAN (EAPOL) frame. The security setup operation may be performed according to a security method not defined in the IEEE 802.11 standard.

According to one embodiment, a security session is established between the STA (301) and the AP (401) according to a security setup operation, and the STA (301) and the AP (401) can perform secure data communication.

FIGS. 4A and 4B are diagrams for explaining a SAR backoff protocol according to an embodiment.

According to one embodiment, wireless communication is performed in such a way that a transmitting end of an electronic device radiates electromagnetic waves to a wireless medium, and a receiving end of an external electronic device receives the radiated electromagnetic waves. If a person is present in a space where electromagnetic waves are emitted and received, significant electromagnetic waves may be absorbed by the human body. Recent studies have reported that electromagnetic waves absorbed by the human body can have various adverse health effects. In particular, when the transmitting and receiving end is in close contact with the human body, the electromagnetic wave absorption rate soars. Accordingly, most countries are regulating the human electromagnetic wave absorption rate for smart devices. As most smart devices use wireless LAN, wireless LAN is also becoming subject to such regulations. Most countries have defined standards for SAR (specific absorption rate), which refers to the electromagnetic wave energy absorbed by the human body, and it is mandatory for smart devices to meet the standards.

Referring to FIG. 4A, according to one embodiment, an example of a SAR backoff protocol performed to respond to regulations related to absorption of electromagnetic waves by the human body can be seen. The SAR backoff protocol may be a protocol that controls transmission power. According to the SAR backoff protocol, smart devices can use high transmission power when they determine that a human body is not close. Additionally, smart devices can reduce transmission power when they determine that a human body is close.

According to one embodiment, smart devices may be equipped with various CS (connectivity solutions) such as LTE and 5G in addition to wireless LAN. In situations where multiple CS (connectivity solutions) are operating simultaneously, the sum of electromagnetic wave energy emitted by each CS may be subject to regulation. At this time, the smart device can reduce the transmission power output by each CS within the limit of the total energy budget. As described above, controlling transmission power to satisfy regulations on electromagnetic wave energy absorbed by the human body is called the SAR backoff protocol. An example of the SAR backoff protocol disclosed in (a) of FIG. 4 may be a protocol that uniformly applies power limitations to all transmissions at a certain point in time (e.g., when a human body approaches a device). The impact of electromagnetic waves on the human body must be calculated in terms of the total amount of energy of electromagnetic waves exposed to it over a certain period of time. The SAR backoff protocol disclosed in (a) of FIG. 4 may involve inefficiencies. For example, if traffic is so low that very little transmission is performed, the total amount of electromagnetic waves exposed to the human body may be minimal even if high transmission power is used. Transmission power limitations that do not necessarily need to be applied may cause a deterioration in user experience.

Referring to FIG. 4B, according to one embodiment, an example of a SAR backoff protocol (eg, time average SAR (TAS) backoff protocol) performed to respond to regulations related to human electromagnetic wave absorption can be seen. The TAS backoff protocol may be a protocol that limits transmission power in terms of the total amount of electromagnetic wave energy radiated during a certain window (e.g., averaging window). The TAS backoff protocol limits the average transmission power during an averaging window (e.g., 100 seconds, 60 seconds) to below a certain value. The TAS backoff protocol can update the TAS backoff limit value in time window units much smaller than the averaging window in order to satisfy electromagnetic wave absorption rate regulations.

According to one embodiment, the TAS backoff protocol can calculate the sum of the product of transmission time and transmission power (e.g., energy usage of the time window) for all transmissions performed during the time window at every time window (or update interval). there is. The TAS backoff protocol can calculate the energy usage of the averaging window by adding up the energy usage of all time windows included in the averaging window. The TAS backoff protocol can guide the transmission power of the time window so that the average of the energy usage of the averaging window divided by the averaging window (e.g., average transmission power) satisfies regulations. The TAS backoff protocol can calculate the allocated energy budget for each time window. The TAS backoff protocol can determine whether to perform a TAS backoff operation for the time window based on the energy budget allocated to the time window. The TAS backoff protocol can set a TAS backoff limit (e.g., transmit power limit) for the time window when performing a TAS backoff operation. The TAS backoff protocol may not unnecessarily restrict transmission in the next time window even if no actual transmission occurs during the time window for which high transmission power is set.

Figures 5A to 5C are diagrams for explaining a spatial reuse protocol according to an embodiment.

Referring to FIG. 5A, according to one embodiment, STAs (eg, STA1, STA2) may communicate in a high-density environment. For example, STAs (eg, STA1, STA2) may communicate in an environment where multiple BBSs (eg, BBS1, BBS2) overlap. BSS 1, which includes STA 1 in communication with AP 1 included in BSS 1, may be referred to as Intra-BSS based on STA 1, and BSS 2 that overlaps Intra-BSS is referred to as OBSS (overlapped BSS) ( Or it may be referred to as Inter-BBS). If multiple BBSs overlap, the communication efficiency of STA 1 may decrease due to interference with other STAs (e.g., STA 2).

According to one embodiment, STA 1 may determine whether the communication channel is occupied by performing a clear channel assessment (CCA) operation. If a transmission power higher than the CCA threshold (e.g., the transmission power of STA 2) is detected through the CCA operation, STA1 may determine that another STA (e.g., STA 2) is occupying the communication channel. STA 1 may not even be able to secure a transmission opportunity due to interference with another STA (e.g., STA 2) (e.g., STA 2 is occupying the communication channel). When the impact of interference is small (e.g., STA 2's transmission power is low), STA 1 can perform transmission while ignoring ongoing transmission (e.g., the transmission that STA 2 is performing), thereby improving media access control efficiency. can increase. This can be referred to as a spatial reuse (SR) operation (e.g., SR operation).

Referring to FIG. 5B, according to one embodiment, an example of a spatial reuse operation performed in the 802.11ax standard can be seen. Adjacent BSSs can set distinct BSS colors (e.g., BSS color=1 for BSS1, BSS color=2 for BSS2). If BSS color information is included in the physical layer header, when detecting a packet, the STA performing clear channel assessment (CCA) determines whether the packet is transmitted within the BSS to which it belongs (e.g. intra-BSS) or an external BSS. It can be determined whether it is transmitted through (e.g. inter-BSS). Here, in the case of packets transmitted in Intra-BSS, the STA can detect the packet based on minimum sensitivity. On the other hand, for packets transmitted in Inter-BSS, the STA applies a higher CCA threshold and, in some cases, ignores ongoing transmission (e.g. ongoing transmission) and transmits (e.g. SR transmission, spatial reuse transmission) can be performed.

Referring to FIG. 5C, according to one embodiment, the relationship between the set CCA threshold and available transmission power according to the spatial reuse protocol can be confirmed. STA1 and STA2 may belong to different BSSs. For example, STA1 may belong to BBS1, and STA2 may belong to BBS2. Since STA1 and STA2 are located where part of the communication coverage of BSS1 and BSS2 overlaps, they can be said to be in an OBSS relationship. Although STA1 belongs to BSS1, it can hear AP2 sending wireless signals. At this time, STA1 may determine that the channel is busy (e.g., the communication channel is occupied) simply by hearing a wireless signal transmitted from an AP belonging to a BSS other than the AP belonging to its own BSS. The standard for determining that a channel is busy may be the OBSS_PD level (OBSS_packet detection level) (e.g., CCA threshold). For example, if the threshold of the OBSS_PD level is -70dBm, if the signal heard from another BSS is more than -70dBm, the channel may be judged to be busy. At this time, if the channel is busy, STA1 may be affected by a signal from another BSS (BSS2).

According to one embodiment, adjusting the CCA threshold and corresponding transmit power may be a way to improve system level performance and spectrum utilization. For example, if a high CCA threshold is set, packets with relatively high signal strength may be ignored. If transmission (e.g., SR transmission) is performed while ignoring packets with high received signal strength, significant interference may occur in transmission that is already being performed (e.g., ongoing transmission). When a high CCA threshold is applied to ignore packets with high signal strength, STA1 performing SR transmission can reduce the size of the transmission power to protect the transmission that is already being performed (e.g., ongoing transmission). . If a low CCA threshold is applied to ignore only packets with sufficiently small signal strength, the level of interference caused by SR transmission can also be expected to be low, so a larger transmission power can be used during SR transmission.

According to one embodiment, the 802.11ax standard defines regulations for the CCA threshold (e.g., OBSS_PD _level ) and available transmission power (e.g., TX_PWR), corresponding to the above-described content. Regulations defined in the 802.11ax standard can be confirmed through Figure 5c. Each value specified in FIG. 5C is an example, and the slope of the linear section may be -1. In FIG. 5C, the horizontal axis may represent the size of available transmission power, and the vertical axis may represent the CCA threshold. If the CCA threshold is large, low transmit power can be used when transmitting SR. If the CCA threshold is small, large transmission power can be used when transmitting SR.

According to one embodiment, the 802.11ax standard only defines that the graph shown in FIG. 5C must be satisfied when transmitting an SR. In the 802.11ax standard, for SR transmission, it is not defined what value of CCA threshold to apply and/or what value of transmission power to use. In other words, which values to use remains an implementation issue for the terminal manufacturer (or chipset manufacturer). Here, the spatial reuse protocol and the SAR backoff protocol described through FIGS. 4A and 4B have something in common: controlling transmission power. Therefore, if the SAR backoff protocol is not considered when transmitting SR, inefficiency may occur in the operation of the spatial reconfiguration protocol.

FIG. 6 is a diagram illustrating a conflict between a spatial reuse protocol and a SAR backoff protocol according to an embodiment.

Referring to Figure 6, the clear channel assessment (CCA) threshold (CCA) according to the spatial reuse protocol. ) and the corresponding transmission power (P _CCA ) are set, and a case where the SAR backoff limit value (P _SAR ) is set according to the SAR backoff protocol can be confirmed. If only the spatial reuse protocol is considered, the first range ( ~ ) within the CCA threshold ( ) can be set. However, the CCA threshold ( Since the transmission power (P _CCA ) corresponding to ) is greater than the SAR backoff limit (P _SAR ), SR transmission cannot be performed through the transmission power (P _CCA ). Therefore, if the SAR backoff protocol is not considered in the CCA threshold setting step, the CCA threshold ( ), meaningless occupancy of communication channels may occur without being able to perform SR transmission using the transmission power (P _CCA ) corresponding to ). When considering the spatial reuse protocol and the SAR backoff protocol together, the _CCA threshold ( ), including the second range ( ~ ) CCA threshold needs to be set within 601.

Figure 7 shows an example of a schematic block diagram of an STA according to an embodiment.

Referring to FIG. 7, according to one embodiment, the STA 701 may perform communication by simultaneously considering the SAR backoff protocol and the spatial reuse protocol. The SAR backoff protocol may control transmission power to respond to regulations related to human electromagnetic wave absorption. The spatial reuse protocol may allow SR (spatial reuse) transmission to be performed while ignoring existing transmission (e.g. ongoing transmission) when the impact of interference between STAs is small. The STA 701 includes a wireless communication module 710 (e.g., the wireless communication module 1192 in FIG. 11), a processor 720 (e.g., the processor 1120 in FIG. 11), and a memory 730 (e.g., in FIG. It may include 11 memories 1130). The wireless communication module 710 may be configured to transmit and receive wireless signals. The wireless communication module 710 may be a Wi-Fi chipset. The processor 720 may be operatively connected to the wireless communication module 710. The memory 730 is electrically connected to the processor 720 and may store instructions executable by the processor 720. The STA 701 may correspond to the electronic device described in FIG. 11 (e.g., the electronic device 1101 in FIG. 11). Therefore, descriptions that overlap with those to be explained with reference to FIG. 11 will be omitted.

According to one embodiment, the processor 720 may check whether a SAR backoff limit exists for the transmission power of the STA 701. The SAR backoff limit value may be a power value.

According to one embodiment, the processor 720 may set a spatial reuse parameter associated with the transmit power of the STA 701 based on the SAR backoff limit. The spatial reuse parameter may be a CCA threshold for performing CCA operations. The processor 720 may obtain a first CCA threshold corresponding to the SAR backoff limit. The processor 720 may obtain the first CCA threshold using the relationship between the CCA threshold and transmission power defined in the 802.11ax standard. The processor 720 may adaptively set the third CCA threshold within the range of the first CCA threshold and the second CCA threshold. The second CCA threshold may be the maximum among allowable CCA thresholds. When a packet received through the wireless communication module 710 includes an intra-BBS frame, the processor 720 may set the third CCA threshold to be close to the first CCA threshold. If the packet includes an inter-BBS frame, the processor 720 may set the third CCA threshold to be close to the second CCA threshold.

According to one embodiment, the processor 720 may perform communication based on a spatial reuse parameter (eg, a third CCA threshold). The processor 720 may determine whether the communication channel is occupied based on the third CCA threshold. The processor 720 may perform communication with transmission power corresponding to the third CCA threshold based on the determination result (eg, the communication channel is not occupied).

According to one embodiment, the processor 720 may calculate the allocated energy budget for the time window based on the TAS backoff algorithm. The TAS backoff algorithm may be an algorithm that limits transmission power in terms of the total amount of electromagnetic wave energy radiated within a certain window (eg, averaging window). The TAS backoff algorithm can limit the average transmission power during the averaging window to below a certain value. The TAS backoff algorithm can update the TAS backoff limit value (e.g., power limit value) in time window units much smaller than the averaging window in order to satisfy electromagnetic wave absorption rate regulations. The TAS backoff algorithm can set a backoff limit to be applied to the time window based on the energy budget allocated to the time window.

According to one embodiment, the processor 720 may, based on the energy budget, allow the STA 701 to set spatial reuse parameters associated with transmission power. The spatial reuse parameter may be a CCA threshold. The processor 720 quantizes a specified range (e.g., a specified range to obtain a CCA threshold) to obtain a plurality of CCA thresholds (e.g., CCA thresholds 911, 912 shown in FIGS. 9B to 9D). 913)) can be obtained. The designated range (e.g., the designated range to obtain the CCA threshold) and the quantization interval of the designated range may be set differently depending on the number of STAs connected to the AP, adjacent BBS situation, and/or traffic situation, Figure 9b The CCA thresholds 911, 912, and 913 shown in FIGS. 9D through 9D may be an example. The processor 720 may calculate the energy margin that can be used during the time window for each of the plurality of CCA thresholds. The processor 720 may obtain a CCA threshold candidate whose energy margin does not exceed the energy budget from among the plurality of CCA thresholds. The processor 720 may adaptively set the CCA threshold corresponding to the time window based on the CCA threshold candidate. The processor 720 may set a CCA threshold corresponding to the time window based on the packet error rate or the type of service being executed. For example, when a real-time service is running, processor 720 may set a high CCA threshold to actively acquire transmission opportunities. For example, when the processor 720 performs communication based on a high CCA threshold, the transmission power of the processor 720 is low and the transmission power of the transmission currently being performed (e.g., ongoing transmission) is high, so the packet error rate is high. This can be high. Accordingly, the processor 720 may randomly select one of the CCA threshold candidates and monitor the packet error rate of communication performed based on the selected CCA threshold. If the packet error rate of communication performed based on the selected CCA threshold is higher than the upper limit, the processor 720 may select a CCA threshold having a lower value than the selected CCA threshold from among CCA threshold candidates.

According to one embodiment, the energy margin may be obtained by the processor 720 monitoring (or detecting) a received signal. The energy margin may be obtained by the processor 720 selecting a received signal whose signal strength is less than the CCA threshold among received signals for each of a plurality of CCA thresholds. The energy margin may be obtained by the processor 720 obtaining a transmission time by adding the reception times of selected received signals to each of a plurality of CCA thresholds. The energy margin may be obtained by the processor 720 obtaining the transmission power corresponding to the CCA threshold for each of a plurality of CCA thresholds. The energy margin may be obtained by the processor 720 multiplying the transmission time and transmission power for each of a plurality of CCA thresholds.

According to one embodiment, the processor 720 may perform communication based on a spatial reuse parameter (eg, CCA threshold). The processor 720 may determine whether the communication channel is occupied based on the CCA threshold. The processor 720 may perform communication with transmission power corresponding to the CCA threshold based on the determination result (e.g., the communication channel is not occupied).

FIG. 8 is a diagram illustrating an example of an operation combining a SAR backoff protocol and a spatial reuse protocol, according to an embodiment.

Referring to FIG. 8, according to one embodiment, a SAR backoff limit (P _SAR ) is set according to the SAR backoff protocol, and a CCA threshold (P SAR ) is set according to the spatial reuse protocol. ) and the corresponding transmission power (P _CCA ) can be confirmed as an example of what is set. When the SAR backoff protocol and spatial reuse protocol are considered simultaneously, the range ( ~ ) (801) within the CCA threshold ( ) can be set.

According to one embodiment, an STA (e.g., STA 701 in FIG. 7) uses the relationship between the CCA threshold and transmission power defined in the 802.11ax standard to set a CCA threshold corresponding to the SAR backoff limit (P _SAR ). value( ) can be obtained. STA 701 sets the CCA threshold ( ) and CCA threshold ( ) within the range of the CCA threshold ( ) By adaptively setting, spatial reconfiguration operations cannot be performed without wasting resources. Below, the case where the TAS backoff protocol among the SAR backoff protocols is combined with the spatial reuse protocol will be described in detail.

FIGS. 9A to 9D are diagrams to explain an example of an operation combining a SAR backoff protocol and a spatial reuse protocol, according to an embodiment.

Referring to FIG. 9A, according to one embodiment, examples of received signals monitored (or detected) by performing clear channel assessment (CCA) can be confirmed. A processor (e.g., processor 720 in FIG. 7) may monitor (or detect) a received signal for a certain period of time. Bar graphs 921, 922, and 923 in FIG. 9A may be a time domain in which a received signal having a power intensity greater than the CCA threshold is received. The empty areas 901 and 902 of FIG. 9A may be a time area in which a received signal whose signal strength is less than the CCA threshold is received. Processor 720 may perform transmission when a received signal is not detected (or can be ignored). That is, the processor 720 may perform transmission during the reception time of received signals whose signal strength is less than the CCA threshold. The processor 720 can obtain the transmission time by adding the reception times (e.g., the times of the areas 901 and 902) of received signals whose signal strength is less than the CCA threshold for each of the plurality of CCA thresholds. there is.

Referring to FIG. 9B, according to one embodiment, an example of the transmission time calculated for each of the plurality of CCA thresholds 911, 912, and 913 can be seen. In FIG. 9B, for convenience of explanation, a plurality of CCA thresholds 911, 912, and 913 are shown as having sections other than specified values, but the form of the CCA thresholds (e.g., specified value, specified section) is not limited to this. No. As the CCA threshold increases, more received signals can be ignored, and the processor 720 can secure more transmission time.

Referring to FIG. 9C, according to one embodiment, an example of transmission power corresponding to each of a plurality of CCA thresholds 911, 912, and 913 can be confirmed. The processor 720 may obtain the transmission power corresponding to each of the plurality of CCA thresholds 911, 912, and 913 based on the relationship between the CCA threshold and transmission power defined in the 802.11ax standard.

Referring to FIG. 9D, according to one embodiment, an example of an energy margin that can be used during a time window can be seen. The processor 720 may obtain an energy margin by multiplying the transmission time and transmission power for each of the plurality of CCA thresholds 911, 912, and 913. According to the spatial reconstruction protocol, the energy margin that can be used during a time window cannot exceed the energy budget allocated to the time window. The processor 720 may select CCA threshold candidates 911 and 913 whose energy margin does not exceed the energy budget from among the plurality of CCA thresholds 911, 912 and 913. The processor 720 may adaptively set the CCA threshold corresponding to the time window based on the CCA threshold candidates 911 and 913. The processor 720 may set a CCA threshold corresponding to the time window based on the packet error rate or the type of service being executed. For example, when a real-time service is running, processor 720 may set a high CCA threshold 913 to actively acquire transmission opportunities. For example, when the processor 720 performs communication based on a high CCA threshold, the transmission power of the processor 720 is low and the transmission power of the transmission currently being performed (e.g., ongoing transmission) is high, so the packet error rate is high. This can be high. Accordingly, the processor 720 may randomly select one 913 of the CCA threshold candidates 911 and 913 and monitor the packet error rate of communication performed based on the selected CCA threshold 913. If the packet error rate of communication performed based on the selected CCA threshold 913 is higher than the upper limit, the processor 720 sets a CCA threshold 911 having a lower value than the selected CCA threshold 913. You can select from CCA threshold candidates 911 and 913.

FIG. 10A is an example of a flowchart explaining a method of operating an STA according to an embodiment.

Operations 1010 to 1030 may be performed sequentially, but are not necessarily performed sequentially. For example, the order of each operation 1010 to 1030 may be changed, and at least two operations may be performed in parallel.

In operation 1010, the STA 701 (e.g., the STA 701 in FIG. 7) may check whether a SAR backoff limit exists for the transmission power of the STA 701.

At operation 1020, the STA 701 may set spatial reuse parameters associated with transmit power based on the SAR backoff limit. The spatial reuse parameter may be a CCA threshold. The STA 701 may obtain a first CCA threshold corresponding to the SAR backoff limit. The STA 701 selects the maximum among the allowable CCA thresholds (e.g., the CCA threshold in FIG. 8 ( )), the second CCA threshold can be obtained. The STA 701 may adaptively set the third CCA threshold within the range of the first CCA threshold and the second CCA threshold. For example, the STA 701 may set the third CCA threshold to be close to the first CCA threshold when a packet received through the wireless communication module includes an intra-BBS frame. For example, the STA 701 may set the third CCA threshold to be close to the second CCA threshold when the packet includes an inter-BBS frame.

In operation 1030, the STA 701 may perform communication based on a spatial reuse parameter (eg, third CCA threshold).

FIG. 10B is an example of a flowchart explaining a method of operating an STA according to an embodiment.

Operations 1040 to 1060 may be performed sequentially, but are not necessarily performed sequentially. For example, the order of each operation 1040 to 1060 may be changed, and at least two operations may be performed in parallel.

In operation 1040, the STA 701 (e.g., STA 701 in FIG. 7) may calculate the allocated energy budget for the time window based on the TAS backoff algorithm.

In operation 1050, the STA 701 may set a spatial reuse parameter associated with the transmission power of the electronic device based on the energy budget. The spatial reuse parameter may be a CCA threshold. The STA 701 quantizes a specified range (e.g., a specified range to obtain a CCA threshold) to generate a plurality of CCA thresholds (e.g., CCA thresholds 911, 912 shown in FIGS. 9B to 9D). 913)) can be obtained. The designated range (e.g., the range designated to obtain the CCA threshold) and the quantization interval of the designated range may be set differently depending on the number of STAs connected to the AP, the adjacent BBS situation, and/or the traffic situation. The STA 701 may calculate the energy margin that can be used during the time window for each of the plurality of CCA thresholds 911, 912, and 913. The STA 701 may obtain CCA threshold candidates 911 and 913 whose energy margin does not exceed the energy budget from among the plurality of CCA thresholds 911, 912 and 913. The STA 701 may adaptively set the CCA threshold corresponding to the time window based on the CCA threshold candidates 911 and 913.

In operation 1060, the STA 701 may perform communication during a time window based on a spatial reuse parameter (e.g., CCA threshold).

FIG. 11 is a block diagram of an electronic device 1101 in a network environment 1100, according to one embodiment.

Referring to FIG. 11, in the network environment 1100, the electronic device 1101 communicates with the electronic device 1102 through a first network 1198 (e.g., a short-range wireless communication network) or a second network 1199. It is possible to communicate with at least one of the electronic device 1104 or the server 1108 through (e.g., a long-distance wireless communication network). According to one embodiment, the electronic device 1101 may communicate with the electronic device 1104 through the server 1108. According to one embodiment, the electronic device 1101 includes a processor 1120, a memory 1130, an input module 1150, an audio output module 1155, a display module 1160, an audio module 1170, and a sensor module ( 1176), interface 1177, connection terminal 1178, haptic module 1179, camera module 1180, power management module 1188, battery 1189, communication module 1190, subscriber identification module 1196. , or may include an antenna module 1197. In some embodiments, at least one of these components (eg, the connection terminal 1178) may be omitted, or one or more other components may be added to the electronic device 1101. In some embodiments, some of these components (e.g., sensor module 1176, camera module 1180, or antenna module 1197) are integrated into one component (e.g., display module 1160). It can be.

The processor 1120, for example, executes software (e.g., program 1140) to operate at least one other component (e.g., hardware or software component) of the electronic device 1101 connected to the processor 1120. It can be controlled and various data processing or calculations can be performed. According to one embodiment, as at least part of data processing or computation, the processor 1120 stores commands or data received from another component (e.g., sensor module 1176 or communication module 1190) in volatile memory 1132. The commands or data stored in the volatile memory 1132 can be processed, and the resulting data can be stored in the non-volatile memory 1134. According to one embodiment, the processor 1120 may include a main processor 1121 (e.g., a central processing unit or an application processor) or an auxiliary processor 1123 that can operate independently or together (e.g., a graphics processing unit, a neural network processing unit ( It may include a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, if the electronic device 1101 includes a main processor 1121 and a auxiliary processor 1123, the auxiliary processor 1123 may be set to use lower power than the main processor 1121 or be specialized for a designated function. You can. The auxiliary processor 1123 may be implemented separately from the main processor 1121 or as part of it.

The auxiliary processor 1123 may, for example, act on behalf of the main processor 1121 while the main processor 1121 is in an inactive (e.g., sleep) state, or while the main processor 1121 is in an active (e.g., application execution) state. ), together with the main processor 1121, at least one of the components of the electronic device 1101 (e.g., the display module 1160, the sensor module 1176, or the communication module 1190) At least some of the functions or states related to can be controlled. According to one embodiment, coprocessor 1123 (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module 1180 or communication module 1190). there is. According to one embodiment, the auxiliary processor 1123 (eg, neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. Artificial intelligence models can be created through machine learning. For example, such learning may be performed in the electronic device 1101 itself on which the artificial intelligence model is performed, or may be performed through a separate server (e.g., server 1108). Learning algorithms may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but It is not limited. An artificial intelligence model may include multiple artificial neural network layers. Artificial neural networks include deep neural network (DNN), convolutional neural network (CNN), recurrent neural network (RNN), restricted boltzmann machine (RBM), belief deep network (DBN), bidirectional recurrent deep neural network (BRDNN), It may be one of deep Q-networks or a combination of two or more of the above, but is not limited to the examples described above. In addition to hardware structures, artificial intelligence models may additionally or alternatively include software structures.

The memory 1130 may store various data used by at least one component (eg, the processor 1120 or the sensor module 1176) of the electronic device 1101. Data may include, for example, input data or output data for software (e.g., program 1140) and instructions related thereto. Memory 1130 may include volatile memory 1132 or non-volatile memory 1134.

The program 1140 may be stored as software in the memory 1130 and may include, for example, an operating system 1142, middleware 1144, or application 1146.

The input module 1150 may receive commands or data to be used in a component of the electronic device 1101 (e.g., the processor 1120) from outside the electronic device 1101 (e.g., a user). The input module 1150 may include, for example, a microphone, mouse, keyboard, keys (eg, buttons), or digital pen (eg, stylus pen).

The sound output module 1155 may output sound signals to the outside of the electronic device 1101. The sound output module 1155 may include, for example, a speaker or receiver. Speakers can be used for general purposes such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part of it.

The display module 1160 can visually provide information to the outside of the electronic device 1101 (eg, a user). The display module 1160 may include, for example, a display, a hologram device, or a projector, and a control circuit for controlling the device. According to one embodiment, the display module 1160 may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of force generated by the touch.

The audio module 1170 can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module 1170 acquires sound through the input module 1150, the sound output module 1155, or an external electronic device (e.g., directly or wirelessly connected to the electronic device 1101). Sound may be output through an electronic device 1102 (e.g., speaker or headphone).

The sensor module 1176 detects the operating state (e.g., power or temperature) of the electronic device 1101 or the external environmental state (e.g., user state) and generates an electrical signal or data value corresponding to the detected state. can do. According to one embodiment, the sensor module 1176 includes, for example, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, It may include a temperature sensor, humidity sensor, or light sensor.

The interface 1177 may support one or more designated protocols that can be used to directly or wirelessly connect the electronic device 1101 to an external electronic device (eg, the electronic device 1102). According to one embodiment, the interface 1177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 1178 may include a connector through which the electronic device 1101 can be physically connected to an external electronic device (eg, the electronic device 1102). According to one embodiment, the connection terminal 1178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 1179 can convert electrical signals into mechanical stimulation (e.g., vibration or movement) or electrical stimulation that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module 1179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 1180 can capture still images and moving images. According to one embodiment, the camera module 1180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 1188 can manage power supplied to the electronic device 1101. According to one embodiment, the power management module 1188 may be implemented as at least a part of, for example, a power management integrated circuit (PMIC).

The battery 1189 may supply power to at least one component of the electronic device 1101. According to one embodiment, the battery 1189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.

Communication module 1190 provides a direct (e.g., wired) communication channel or wireless communication channel between the electronic device 1101 and an external electronic device (e.g., electronic device 1102, electronic device 1104, or server 1108). It can support establishment and communication through established communication channels. Communication module 1190 operates independently of processor 1120 (e.g., an application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module 1190 may be a wireless communication module 1192 (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 1194 (e.g., : LAN (local area network) communication module, or power line communication module) may be included. Among these communication modules, the corresponding communication module is a first network 1198 (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network 1199 (e.g., legacy It may communicate with an external electronic device 1104 through a telecommunication network such as a cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., LAN or WAN). These various types of communication modules may be integrated into one component (e.g., a single chip) or may be implemented as a plurality of separate components (e.g., multiple chips). The wireless communication module 1192 uses subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 1196 within a communication network such as the first network 1198 or the second network 1199. The electronic device 1101 can be confirmed or authenticated.

The wireless communication module 1192 may support 5G networks and next-generation communication technologies after 4G networks, for example, NR access technology (new radio access technology). NR access technology provides high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and access to multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low latency). -latency communications)) can be supported. The wireless communication module 1192 may support high frequency bands (e.g., mmWave bands), for example, to achieve high data rates. The wireless communication module 1192 uses various technologies to secure performance in high frequency bands, for example, beamforming, massive array multiple-input and multiple-output (MIMO), and full-dimensional multiplexing. It can support technologies such as input/output (FD-MIMO: full dimensional MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module 1192 may support various requirements specified in the electronic device 1101, an external electronic device (e.g., electronic device 1104), or a network system (e.g., second network 1199). According to one embodiment, the wireless communication module 1192 supports peak data rate (e.g., 20 Gbps or more) for realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mmTC, or U-plane latency (e.g., 164 dB or less) for realizing URLLC. Example: Downlink (DL) and uplink (UL) each of 0.5 ms or less, or round trip 1 ms or less) can be supported.

The antenna module 1197 may transmit or receive signals or power to or from the outside (e.g., an external electronic device). According to one embodiment, the antenna module 1197 may include an antenna including a radiator made of a conductor or a conductive pattern formed on a substrate (eg, PCB). According to one embodiment, the antenna module 1197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for the communication method used in the communication network, such as the first network 1198 or the second network 1199, is connected to the plurality of antennas by, for example, the communication module 1190. can be selected. Signals or power may be transmitted or received between the communication module 1190 and an external electronic device through the selected at least one antenna. According to some embodiments, other components (eg, radio frequency integrated circuit (RFIC)) in addition to the radiator may be additionally formed as part of the antenna module 1197.

According to one embodiment, the antenna module 1197 may form a mmWave antenna module. According to one embodiment, a mmWave antenna module includes: a printed circuit board, an RFIC disposed on or adjacent to a first side (e.g., bottom side) of the printed circuit board and capable of supporting a designated high frequency band (e.g., mmWave band); And a plurality of antennas (e.g., array antennas) disposed on or adjacent to the second side (e.g., top or side) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band. can do.

At least some of the components are connected to each other through a communication method between peripheral devices (e.g., bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and signal ( (e.g. commands or data) can be exchanged with each other.

According to one embodiment, commands or data may be transmitted or received between the electronic device 1101 and the external electronic device 1104 through the server 1108 connected to the second network 1199. Each of the external electronic devices 1102 or 1104 may be of the same or different type as the electronic device 1101. According to one embodiment, all or part of the operations performed in the electronic device 1101 may be executed in one or more of the external electronic devices 1102, 1104, or 1108. For example, when the electronic device 1101 needs to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device 1101 does not execute the function or service on its own. Alternatively, or additionally, one or more external electronic devices may be requested to perform at least part of the function or service. One or more external electronic devices that have received the request may execute at least part of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device 1101. The electronic device 1101 may process the result as is or additionally and provide it as at least part of a response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology can be used. The electronic device 1101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device 1104 may include an Internet of Things (IoT) device. Server 1108 may be an intelligent server using machine learning and/or neural networks. According to one embodiment, the external electronic device 1104 or server 1108 may be included in the second network 1199. The electronic device 1101 may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

An electronic device according to an embodiment disclosed in this document may be of various types. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of this document are not limited to the above-described devices.

An embodiment of this document and the terms used herein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various changes, equivalents, or substitutes for the embodiment. In connection with the description of the drawings, similar reference numbers may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the above items, unless the relevant context clearly indicates otherwise. As used herein, “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A Each of phrases such as “at least one of , B, or C” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof. Terms such as "first", "second", or "first" or "second" may be used simply to distinguish one component from another, and to refer to that component in other respects (e.g., importance or order) is not limited. One (e.g., first) component is said to be “coupled” or “connected” to another (e.g., second) component, with or without the terms “functionally” or “communicatively.” When mentioned, it means that any of the components can be connected to the other components directly (e.g. wired), wirelessly, or through a third component.

The term “module” used in one embodiment of this document may include a unit implemented in hardware, software, or firmware, and may be interchangeable with terms such as logic, logic block, component, or circuit, for example. can be used A module may be an integrated part or a minimum unit of the parts or a part thereof that performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

One embodiment of this document is one or more instructions stored in a storage medium (e.g., built-in memory 1136 or external memory 1138) that can be read by a machine (e.g., electronic device 1101). It may be implemented as software (e.g., program 1140) including these. For example, a processor (e.g., processor 1120) of a device (e.g., electronic device 1101) may call at least one command among one or more commands stored from a storage medium and execute it. This allows the device to be operated to perform at least one function according to the at least one instruction called. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. A storage medium that can be read by a device may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain signals (e.g. electromagnetic waves), and this term refers to cases where data is semi-permanently stored in the storage medium. There is no distinction between temporary storage cases.

According to one embodiment, a method according to an embodiment disclosed in this document may be provided and included in a computer program product. Computer program products are commodities and can be traded between sellers and buyers. The computer program product may be distributed in the form of a machine-readable storage medium (e.g. compact disc read only memory (CD-ROM)) or through an application store (e.g. Play StoreTM) or on two user devices (e.g. It can be distributed (e.g. downloaded or uploaded) directly between smart phones) or online. In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

According to one embodiment, each component (e.g., module or program) of the above-described components may include a single or multiple entities, and some of the multiple entities may be separately placed in other components. . According to one embodiment, one or more of the above-described corresponding components or operations may be omitted, or one or more other components or operations may be added. Alternatively or additionally, multiple components (eg, modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each component of the plurality of components in the same or similar manner as those performed by the corresponding component of the plurality of components prior to the integration. . According to one embodiment, operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or , or one or more other operations may be added.

An electronic device (e.g., STA 701 in FIG. 7, electronic device 1101 in FIG. 11) according to an embodiment includes one or more wireless communication modules (e.g., wireless communication module 710 in FIG. 7) configured to transmit and receive wireless signals. ), wireless communication module 1192 in FIG. 11), one or more processors operatively connected to the wireless communication module 710 (e.g., processor 720 in FIG. 7, processor 1120 in FIG. 11) ; and a memory (e.g., memory 730 in FIG. 7 and memory 1130 in FIG. 11) that is electrically connected to the processor 720 and stores instructions executable by the processor 720. When the instructions are executed by the processor 720, the processor 720 may check whether a SAR backoff limit value for the transmission power of the electronic device 701 exists. The processor 720 may set a spatial reuse parameter associated with the transmit power based on the SAR backoff limit. The processor 720 may perform communication based on the spatial reuse parameter.

According to one embodiment, the spatial reuse parameter may be a CCA threshold.

According to one embodiment, the processor 720 may obtain a first CCA threshold corresponding to the SAR backoff limit. The processor 720 may adaptively set a third CCA threshold within the range of the first CCA threshold and the second CCA threshold. The second CCA threshold may be the maximum among allowable CCA thresholds.

According to one embodiment, when the packet received through the wireless communication module 710 includes an intra-BBS frame, the processor 720 approaches the third CCA threshold to the first CCA threshold. It can be set to do so. When the packet includes an inter-BBS frame, the processor 720 may set the third CCA threshold to be close to the second CCA threshold.

According to one embodiment, the processor 720 may determine whether the communication channel is occupied based on the third CCA threshold. The processor 720 may perform communication with transmission power corresponding to the third CCA threshold based on the determination result.

According to one embodiment, the SAR backoff limit value may be a transmission power limit value of the electronic device 701.

An electronic device (e.g., STA 701 in FIG. 7, electronic device 1101 in FIG. 11) according to an embodiment includes one or more wireless communication modules (e.g., wireless communication module 710 in FIG. 7) configured to transmit and receive wireless signals. ), wireless communication module 1192 in FIG. 11), one or more processors operatively connected to the wireless communication module 710 (e.g., processor 720 in FIG. 7, processor 1120 in FIG. 11) ; and a memory (e.g., memory 730 in FIG. 7 and memory 1130 in FIG. 11) that is electrically connected to the processor 720 and stores instructions executable by the processor 720. When the instructions are executed by the processor 720, the processor 720 may calculate the allocated energy budget for the time window based on the TAS backoff algorithm. The processor 720 may set a spatial reuse parameter associated with the transmission power of the electronic device 701 based on the energy budget. The processor 720 may perform communication during the time window based on the spatial reuse parameter.

According to one embodiment, the spatial reuse parameter may be a CCA threshold.

According to one embodiment, the processor 720 may calculate an energy margin that can be used during the time window for each of the plurality of CCA thresholds 911, 912, and 913. The processor 720 selects CCA threshold candidates 911, 913 whose energy margin does not exceed the energy budget among a plurality of CCA thresholds (e.g., thresholds 911, 912, and 913 in FIG. 9). It can be obtained. The processor 720 may adaptively set the CCA threshold corresponding to the time window based on the CCA threshold candidates 911 and 913.

According to one embodiment, the energy margin may be obtained by the processor 720 monitoring a received signal. The energy margin is determined by the processor 720 when the signal strength among the received signals is determined by each of the plurality of CCA thresholds 911, 912, and 913. It may be obtained by selecting each smaller received signal. For example, the processor 720 determines that the signal strength among the received signals is A received signal smaller than the first CCA threshold (e.g., CCA threshold 911) may be selected. For example, the processor 720 determines that the signal strength among the received signals is A received signal smaller than the second CCA threshold (e.g., CCA threshold 912) may be selected. For example, the processor 720 determines that the signal strength among the received signals is A received signal smaller than the third CCA threshold (e.g., CCA threshold 913) may be selected.

The energy margin may be obtained by the processor 720 obtaining a transmission time by adding reception times of selected received signals to each of the plurality of CCA thresholds 911, 912, and 913. The energy margin may be obtained by the processor 720 obtaining transmission power corresponding to the CCA threshold for each of the plurality of CCA thresholds 911, 912, and 913. The energy margin may be obtained by the processor 720 multiplying the transmission time and the transmission power for each of the plurality of CCA thresholds 911, 912, and 913.

According to one embodiment, the processor 720 may set a CCA threshold corresponding to the time window based on the packet error rate or the type of service being executed.

According to one embodiment, the processor 720 may perform communication based on a higher CCA threshold 913 among the CCA threshold candidates 911 and 913 when a real-time service is running.

According to one embodiment, the TAS backoff algorithm may be an algorithm that limits the average transmission power during the averaging window to below a specific value.

According to one embodiment, the processor 720 may determine whether the communication channel is occupied based on the CCA threshold. The processor 720 may perform communication with transmission power corresponding to the CCA threshold based on the determination result.

A method of operating an electronic device (e.g., the STA 701 in FIG. 7 and the electronic device 1101 in FIG. 11) according to an embodiment includes checking whether a SAR backoff limit value for the transmission power of the electronic device exists. It can be included. The method of operating the electronic device 701 may include setting a spatial reuse parameter associated with the transmission power based on the SAR backoff limit value. The method of operating the electronic device 701 may include performing communication based on the spatial reuse parameter.

According to one embodiment, the spatial reuse parameter may be a CCA threshold.

According to one embodiment, setting the spatial reuse parameter may include obtaining a first CCA threshold corresponding to the SAR backoff limit. Setting the spatial reuse parameter may include adaptively setting a third CCA threshold within a range of the first and second CCA thresholds. The second CCA threshold may be the maximum among allowable CCA thresholds.

According to one embodiment, the adaptive setting operation is to set the third CCA threshold close to the first CCA threshold when a packet received through the wireless communication module includes an intra-BBS frame. Can include setting actions. The adaptively setting operation may include setting the third CCA threshold to be close to the second CCA threshold when the packet includes an inter-BBS frame.

According to one embodiment, the operation of performing the communication may include determining whether the communication channel is occupied based on the third CCA threshold. The operation of performing the communication may include performing communication with transmission power corresponding to the third CCA threshold based on the determination result.

According to one embodiment, the SAR backoff limit value may be a transmission power limit value of the electronic device 701.

701: S.T.A.
710: wireless communication module
720: Processor
730: Memory

Claims (20)

In the electronic device 701,
One or more wireless communication modules 710 configured to transmit and receive wireless signals;
One or more processors 720 operatively connected to the wireless communication module 710; and
It includes a memory 730 that is electrically connected to the processor 720 and stores instructions executable by the processor 720,
When the instructions are executed by the processor 720, the processor 720:
Check whether a SAR backoff limit exists for the transmission power of the electronic device 701,
Based on the SAR backoff limit, set a spatial reuse parameter associated with the transmit power,
Performing communication based on the spatial reuse parameter,
Electronic devices (701).
According to paragraph 1,
The spatial reuse parameter is,
CCA threshold,
Electronic devices (701).
According to any one of paragraphs 1 and 2,
The processor 720,
Obtain a first CCA threshold corresponding to the SAR backoff limit,
Adaptively setting a third CCA threshold within the range of the first CCA threshold and the second CCA threshold,
The second CCA threshold is the maximum among the allowable CCA thresholds,
Electronic devices (701).
According to any one of claims 1 to 3,
The processor 720,
When the packet received through the wireless communication module 710 includes an intra-BBS frame, the third CCA threshold is set to be close to the first CCA threshold,
When the packet includes an inter-BBS frame, setting the third CCA threshold to be close to the second CCA threshold,
Electronic devices (701).
According to any one of claims 1 to 4,
The processor 720,
Determine whether the communication channel is occupied based on the third CCA threshold,
Performing communication with transmission power corresponding to the third CCA threshold based on the determination result,
Electronic devices (701).
According to any one of claims 1 to 5,
The SAR backoff limit value is,
The transmission power limit value of the electronic device 701,
Electronic devices (701).
In the electronic device 701,
One or more wireless communication modules 710 configured to transmit and receive wireless signals;
One or more processors 720 operatively connected to the wireless communication module 710; and
It includes a memory 730 that is electrically connected to the processor 720 and stores instructions executable by the processor 720,
When the instructions are executed by the processor 720, the processor 720:
Based on the TAS backoff algorithm, calculate the allocated energy budget for the time window,
Based on the energy budget, set a spatial reuse parameter associated with the transmit power of the electronic device (701),
performing communication during the time window based on the spatial reuse parameter,
Electronic devices (701).
In clause 7,
The spatial reuse parameter is,
CCA threshold,
Electronic devices (701).
According to any one of paragraphs 7 and 8,
The processor 720,
For each of the plurality of CCA thresholds 911, 912, and 913, calculate an energy margin that can be used during the time window,
Among the plurality of CCA thresholds (911, 912, 913), obtain CCA threshold candidates (911, 913) whose energy margin does not exceed the energy budget,
Based on the CCA threshold candidates 911 and 913, adaptively setting the CCA threshold corresponding to the time window,
Electronic devices (701).
According to any one of claims 7 to 9,
The energy margin is,
The processor 720 monitors the received signal,
For each of the plurality of CCA thresholds 911, 912, and 913, select a received signal whose signal strength is smaller than each of the plurality of CCA thresholds 911, 912, and 913, respectively, from among the received signals,
For each of the plurality of CCA thresholds 911, 912, and 913, the reception times of the selected received signals are added to obtain the transmission time,
For each of the plurality of CCA thresholds 911, 912, and 913, obtain the transmission power corresponding to the CCA threshold,
Obtained by multiplying the transmission time and the transmission power for each of the plurality of CCA thresholds 911, 912, and 913,
Electronic devices (701).
According to any one of claims 7 to 10,
The processor 720,
Setting a CCA threshold corresponding to the time window based on the packet error rate or the type of service being executed,
Electronic devices (701).
According to any one of claims 7 to 11,
The processor 720,
When a real-time service is running, communication is performed based on a higher CCA threshold (913) among the CCA threshold candidates (911, 913).
Electronic devices (701).
According to any one of claims 7 to 12,
The TAS backoff algorithm is,
An algorithm that limits the average transmission power during the averaging window to below a certain value,
Electronic devices (701).
According to any one of claims 7 to 13,
The processor 720,
Determine whether the communication channel is occupied based on the CCA threshold,
Performing communication with transmission power corresponding to the CCA threshold based on the determination result,
Electronic devices (701).
In the method of operating the electronic device 701,
Checking whether a SAR backoff limit exists for the transmission power of the electronic device;
setting a spatial reuse parameter associated with the transmit power based on the SAR backoff limit; and
An operation of performing communication based on the spatial reuse parameter
A method of operating an electronic device 701, including.
According to clause 15,
The spatial reuse parameter is,
CCA threshold,
Method of operating the electronic device 701.
According to any one of claims 15 and 16,
The operation of setting the spatial reuse parameter is,
Obtaining a first CCA threshold corresponding to the SAR backoff limit; and
An operation of adaptively setting a third CCA threshold within the range of the first CCA threshold and the second CCA threshold.
Including,
The second CCA threshold is the maximum among the allowable CCA thresholds,
Method of operating the electronic device 701.
According to any one of claims 15 to 17,
The adaptive setting operation is,
An operation of setting the third CCA threshold to be close to the first CCA threshold when a packet received through the wireless communication module includes an intra-BBS frame, or
An operation of setting the third CCA threshold to be close to the second CCA threshold when the packet includes an inter-BBS frame
A method of operating an electronic device 701, including.
According to any one of claims 15 to 18,
The operation of performing the communication is,
An operation of determining whether a communication channel is occupied based on the third CCA threshold; and
An operation of performing communication with transmission power corresponding to the third CCA threshold based on the determination result.
A method of operating an electronic device 701, including.
According to any one of claims 15 to 19,
The SAR backoff limit value is,
The transmission power limit value of the electronic device 701,
Method of operating the electronic device 701.

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