Space reuse method and device 1

Abstract

This application provides a spatial reuse method and a first device. The method is applicable to WLAN systems supporting EHT or 802.11be standards. The method includes the steps of receiving a physical layer protocol data unit (PPDU) transmitted by a second device, where the bandwidth of the PPDU includes a plurality of 20 megahertz MHz subchannels, and performing OBSS PD-based spatial reuse, where a first signal strength level of the received PPDU is less than an OBSS PD level, and the unit of the first signal strength level is decibel milliwatt dBm / 20MHz. According to the method provided in this application, it can be understood that when the first device cannot receive all 20 MHz subchannels of the entire bandwidth of the PPDU, or preamble puncturing occurs, or cannot obtain complete preamble puncturing information, it can still successfully measure the signal strength level. This increases the feasible scenarios in which OBSS PD-based spatial reuse can be performed, and improves the overall system throughput.

Description

[Technical Field]

[0002] This application relates to the field of communication technology, and more particularly to a method for reusing space and a first device. [Background technology]

[0003] Wireless local area network (WLAN) standards have evolved through many generations, including 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, and the currently discussed 802.11be. The 802.11n standard is referred to as high throughput (HT), the 802.11ac standard as very high throughput (VHT), the 802.11ax standard as high efficiency (HE), and the 802.11be standard as extremely high throughput (EHT).

[0004] WLAN devices in 802.11ax, such as access points and stations, support only half-duplex transmission. In other words, on the same spectral bandwidth or channel, only one device can transmit information; other devices can only receive signals but cannot transmit signals to avoid interference with the current transmitting device. However, as the density of WLAN devices increases, it is becoming more common for basic service sets (BSSs) to overlap with other BSSs. In other words, overlapping basic service sets (OBSSs) are becoming more common. When conventional methods are used, the transmission efficiency is very low. In this case, 802.11ax proposes a spatial reuse method. The transmit power is adaptively adjusted so that devices in overlapping basic service sets can perform transmissions simultaneously. This improves transmission efficiency.

[0005] For example, suppose BSS1 includes an access point (AP) 1 and multiple stations (STAs) 1. BSS2 includes AP2 and STA2. BSS2 is the OBSS of BSS1. When AP1 transmits a PPDU (physical layer protocol data unit, PPDU) 1 to STA1, AP2 may also receive the PPDU 1 transmitted by AP1 because the basic service areas of BSS1 and BSS2 partially overlap. In the OBSS packet detection-based (OBSS PD-based, PD: packet detection) spatial reuse method, one requirement for AP2 to perform OBSS PD-based spatial reuse is that the received signal strength level of the PPDU 1 received by AP2 across the entire bandwidth is less than the OBSS PD level. However, conventional techniques for determining whether to perform OBSS PD-based spatial reuse based on signal strength levels across bandwidth can lead to situations where AP2 cannot determine whether to perform OBSS PD-based spatial reuse if AP2 cannot receive all 20MHz subchannels across the entire bandwidth of PPDU1, if preamble puncturing occurs within PPDU1, or if AP2 cannot obtain complete preamble puncturing information for PPDU1. This reduces the overall system throughput. [Overview of the project]

[0006] Embodiments of this application provide a space reuse method and a first device that help increase the number of viable scenarios in which OBSS PD-based space reuse can be performed and improve overall system throughput.

[0007] According to a first aspect, the application provides a spatial reuse method, the method comprising: a first device receiving a Physical Layer Protocol Data Unit (PPDU) transmitted by a second device, wherein the bandwidth of the PPDU includes a plurality of 20 megahertz MHz subchannels; and the first device performing duplicate basic service set packet detection (OBSS PD) based spatial reuse, wherein the first signal intensity level of the PPDU received by the first device is less than the OBSS PD level, and the unit of the first signal intensity level is decibel milliwatts (dBm / 20MHz).

[0008] In the method described in the first embodiment, the first device can be understood to measure a first signal intensity level of the PPDU at dBm / 20MHz. Compared to techniques that cannot operate or be implemented in these scenarios to measure the signal intensity level based on the entire bandwidth when the first device cannot receive all 20MHz subchannels of the entire bandwidth of the PPDU, or when preamble puncturing occurs, or when complete preamble puncturing information cannot be obtained, the technique in this embodiment of the application can be implemented in these scenarios to measure the signal intensity level based on a 20MHz granularity. This increases the number of viable scenarios in which OBSS PD-based spatial reuse can be performed, improving the overall system throughput.

[0009] In possible implementations, the first signal strength level is obtained based on signal strength measurements of multiple nonpunctured 20 MHz subchannels within the PPDU.

[0010] When signal strength measurements from multiple 20MHz subchannels are normalized to obtain a first signal strength level, it is assumed that the multiple 20MHz subchannels include punctured 20MHz subchannels, on which no energy may be transmitted at all. In this case, the obtained first signal strength level will be inaccurate. Alternatively, other signals or interference may be present on the punctured 20MHz subchannels. As a result, the first signal strength level cannot be accurately measured. Therefore, the accuracy of the determined first signal strength level needs to be improved, and the first device needs to be accurately triggered to perform OBSS PD-based spatial reuse, while punctured 20MHz subchannels are excluded.

[0011] Optionally, multiple unpunctured 20MHz subchannels are placed on the primary channel. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal intensity level in an accurate and viable manner.

[0012] Optionally, multiple unpunctured 20MHz subchannels may be alternatively unpunctured and standard pre-specified 20MHz subchannels within the PPDU. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal intensity level in an accurate and viable manner.

[0013] Optionally, the first device first obtains the puncturing information of the PPDU, determines, based on the puncturing information, which 20 MHz subchannels in the PPDU are unpunctured subchannels, and then determines to measure the signal strength of the unpunctured 20 MHz subchannels in the PPDU. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal strength level in an accurate / implementable manner.

[0014] Optionally, alternatively, the first device may determine, through blind detection, which 20 MHz subchannels are unpunctured subchannels, and then determine to measure the signal strength of the unpunctured 20 MHz subchannels in the PPDU. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal strength level in an accurate / implementable manner.

[0015] Optionally, a plurality of unpunctured 20 MHz subchannels are the 20 MHz subchannels in which the first device operates. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal strength level in an accurate / implementable manner.

[0016] Optionally, the first signal strength level is obtained by normalizing the signal strength measurement results of a plurality of unpunctured 20 MHz subchannels in the PPDU. Based on this possible implementation, the determined first signal strength level can be more accurate. Based on this optional implementation, the signal strength measurement results of a plurality of unpunctured 20 MHz subchannels in the PPDU are normalized to obtain the first signal strength level of the PPDU in dBm / 20 MHz, which helps to reduce the complexity of the OBSS_PD level calculation.

[0017] Optional,

[0018]

number

[0019] That is Rx_PWR dBm / 20MHz This is the first signal strength level, Rx_PWR nonpuc-measured,total This is the sum of the signal strength measurements of multiple uncropped 20MHz subchannels within the PPDU, and N nonpunc-measured This is the number of multiple punctured 20MHz subchannels measured.

[0020] In a possible implementation, the first signal strength level is obtained based on the signal strength measurement result of an unpunctured 20MHz subchannel within the PPDU, which is the primary 20MHz channel. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal strength level in an accurate and viable manner.

[0021] In a possible implementation, the first signal strength level is obtained based on the signal strength measurement result of an unpunctured 20MHz subchannel within the PPDU, where the unpunctured 20MHz subchannel is an unpunctured, standard pre-specified 20MHz subchannel within the PPDU. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal strength level in an accurate and viable manner.

[0022] In a possible implementation, the first signal strength level is obtained based on the signal strength measurement results of the non - punctured 20 MHz sub - channels within the PPDU, and the non - punctured 20 MHz sub - channels are the 20 MHz channels on which the first device operates. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal strength level in an accurate / executable manner.

[0023] In a possible implementation,

[0024] [Number]

[0025] is. OBSS_PD level is the OBSS PD level, and OBSS_PD min and OBSS_PD max are the minimum value and the maximum value of OBSS_PD level respectively, and TX_PWR ref is the reference power, and TX_PWR is the transmission power when the second device transmits the PPDU.

[0026] Based on this possible implementation, the first signal strength is obtained through measurement on the non - punctured 20 MHz sub - channels of the PPDU, or the first signal strength is obtained by normalizing the signal measurement results of multiple non - punctured 20 MHz sub - channels of the PPDU. In other words, the unit of the first signal strength is decibel - milliwatt dBm / 20 MHz. In addition, the units of OBSS_PD min and OBSS_PD max are also dBm / 20 MHz. In this case, for different bandwidths of the PPDU, OBSS_PD level does not need to be further normalized. This helps to reduce the complexity of the calculation of OBSS_PD level .

[0027] According to a second aspect, this application provides a first device capable of performing the method of the first aspect. The functions of the first device may be implemented by hardware or by hardware running corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions. The units or modules may be software and / or hardware. For the operations performed by the communication device and their advantageous effects, please refer to the method and its advantageous effects in the first aspect.

[0028] According to a third aspect, the application provides a first device, the first device comprising a processor, memory, and a transceiver. The memory is configured to store a computer program, the transceiver is configured to transmit and receive data, and the processor is configured to execute the computer program stored in the memory to carry out the method in the first aspect.

[0029] According to a fourth aspect, the application provides a chip comprising a processor and an interface. The processor is coupled to the interface. The interface is configured to receive or output signals. The processor is configured to execute code instructions, thereby performing the method of the first aspect.

[0030] According to a fifth aspect, the application further provides a computer-readable storage medium that stores computer-executable instructions, and when the computer-executable instructions are invoked by a computer, the computer is able to perform the method in the first aspect.

[0031] According to a sixth aspect, the application further provides a computer program product including instructions. The computer program product includes computer program code. When the computer program code is executed on a computer, the computer becomes capable of performing the method in the first aspect. [Brief explanation of the drawing]

[0032] [Figure 1] This is a schematic diagram of the system architecture according to this application. [Figure 2(a)] This schematic diagram illustrates how the frequency bands in which the first device operates do not completely overlap with the frequency bands in which the second device operates. [Figure 2(b)] This schematic diagram illustrates how the frequency bands in which the first device operates do not completely overlap with the frequency bands in which the second device operates. [Figure 3] This is a schematic diagram of the space reuse method described in this application. [Figure 4] This is a schematic diagram of PPDU transmission according to this application. [Figure 5] This is a schematic diagram of the primary channel according to this application. [Figure 6] This is a schematic diagram of the structure of the communication device described in this application. [Figure 7] This is a schematic diagram of the structure of another communication device according to this application. [Figure 8] This is a schematic diagram of the structure of the chip device according to this application. [Modes for carrying out the invention]

[0033] In the following sections, specific embodiments of this application will be described in detail with reference to the attached figures.

[0034] In the specification, claims, and accompanying drawings of this invention, terms such as “first,” “second,” “third,” and “fourth” are intended to distinguish between different objects, but not to indicate a specific order. In addition, the terms “includes” and “has” and any other variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other specific steps or units of the process, method, product, or device.

[0035] As used in this application, “Embodiments” means that specific features, structures, or characteristics described in relation to an embodiment may be included in at least one embodiment of the present invention. Phrases appearing in various places within the specification do not necessarily mean the same embodiment, nor are they independent or alternative embodiments of other embodiments. It will be understood, both expressly and implicitly, by those skilled in the art that embodiments described in the specification may be combined with other embodiments.

[0036] "Multiple" means two or more. The term "and / or" describes an association relationship between related objects, indicating that three relationships are possible. For example, A and / or B could indicate three cases: A only exists, both A and B exist, and B only exists. The symbol " / " usually indicates an "or" relationship between related objects.

[0037] Embodiments of this application provide a space reuse method and a first device. The method provided in embodiments of this application is applicable to a wireless communication system. The wireless communication system may be a wireless local area network (WLAN) or a cellular network, and the method may be implemented by a first device in the wireless communication system, or by a chip or processor in the first device. In the wireless local area network, the first device supports communication performed using the IEEE 802.11 series protocol, which includes 802.11be, 802.11ax, or 802.11a / b / g / n / ac.

[0038] The following describes, first, a system architecture to which the embodiments of this application may be applied.

[0039] Figure 1 is a schematic diagram of a system architecture according to an embodiment of this application. As shown in Figure 1, the system architecture includes BSS1 and BSS2. BSS1 includes AP1 and a plurality of STA1. BSS2 includes AP2 and STA2. When an unassociated basic service set (BSS) and a station-associated BSS operate on the same frequency band (also called a channel), and the unassociated BSS is (partially or entirely) within the basic service area of ​​the associated BSS, the unassociated BSS is referred to as the station's OBSS. In this case, as shown in Figure 1, BSS1 and BSS2 are OBSS of each other. Specifically, BSS2 is the OBSS of BSS1, and BSS1 is the OBSS of BSS2.

[0040] Because the basic service areas of BSS1 and BSS2 partially overlap, as shown in Figure 1, when AP1 and STA1 in BSS1 perform data transmission, AP2 in BSS2 can receive the information transmitted by AP1 and STA1. Similarly, when AP2 and STA2 in BSS2 perform data transmission, AP1 in BSS1 can receive the information transmitted by AP2 and STA2.

[0041] An AP (Access Point) may be an access point used by terminal devices (e.g., mobile phones) to access a wired (or wireless) network, and is primarily located in homes, buildings, and parks. A typical coverage radius is several tens to several hundred meters. Of course, access points may also be located outdoors. An AP is equivalent to a bridge connecting a wired network and a wireless network. APs are primarily used to connect wireless network clients to each other and then connect the wireless network to Ethernet. Specifically, an AP may be a terminal device (e.g., a mobile phone) or network device (e.g., a router) with a wireless fidelity (Wi-Fi) chip. An AP may be a device that supports the 802.11be standard. The AP may also be a device that supports multiple current and future wireless local area network (WLAN) 802.11 family standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0042] STA is sometimes also referred to as a non-Access Point Station (non-AP STA). For ease of explanation, STA will be used as an example below. STA may be a wireless communication chip, wireless sensor, or wireless communication terminal. For example, STA may be a mobile phone supporting Wi-Fi, a tablet computer supporting Wi-Fi, a set-top box supporting Wi-Fi, a smart TV supporting Wi-Fi, a smart wearable device supporting Wi-Fi, an in-vehicle communication device supporting Wi-Fi, or a computer supporting Wi-Fi. Optionally, STA may support the 802.11be standard. STA may also support multiple current or future wireless local area network (WLAN) 802.11 family standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0043] For example, AP and STA may be devices used in the Internet of Vehicles, Internet of Things (IoT) nodes or sensors, smart cameras, smart remote controls, or smart water or electricity meters in a smart home, or sensors in a smart city.

[0044] Figure 1 should be understood to show two APs and three STAs for illustrative purposes only. Embodiments of this disclosure may be extended to apply to any other number of APs capable of communicating with any suitable number of other devices.

[0045] When AP1 transmits PPDU (physical layer protocol data unit, PPDU)1 to STA1, AP2 can also receive PPDU1 transmitted by AP1 because the basic service areas of BSS1 and BSS2 partially overlap. In the OBSS packet detection-based (OBSS PD-based, PD: packet detection) spatial reuse method, one requirement for AP2 to perform OBSS PD-based spatial reuse is that the received signal strength level of PPDU1 received by AP2 across the entire bandwidth is less than the OBSS PD level. The OBSS PD level can be determined according to the following equation (1).

[0046]

number

[0047] OBSS_PD level This corresponds to the OBSS PD level. OBSS_PD min and OBSS_PD max These are OBSS_PD respectively. level These are the minimum and maximum values, which are specified in advance by default or indicated by the AP. TX_PWR ref is the reference power. For STA, the reference power is 21 dBm. For AP, the reference power is 21 dBm or 25 dBm, depending on the case. TX_PWR is the transmit power when AP2 transmits the PPDU. PPDU_BW is the total bandwidth of PPDU1 received by AP2.

[0048] As shown in Figures 2(a) and 2(b), when the frequency band in which the first device operates does not overlap at all with the bandwidth range of the PPDU received by the first device, the first device cannot obtain the signal strength level across the entire bandwidth of the PPDU when receiving the PPDU transmitted by the second device. In addition, when preamble puncturing occurs within the PPDU, or when the first device cannot obtain complete preamble puncturing information for the first device, the first device cannot obtain the signal strength level across the entire bandwidth of the PPDU. In some of these cases, AP2 cannot successfully measure the signal strength level of PPDU1 across the entire bandwidth, and therefore cannot decide whether to perform OBSS PD-based spatial reuse. This reduces the overall system throughput.

[0049] From this perspective, embodiments of this disclosure provide an improved method for reusing space. The method for reusing space provided in embodiments of this application will be described in detail below.

[0050] Figure 3 is a schematic flowchart of a space reuse method according to an embodiment of this application. As shown in Figure 3, the space reuse method includes the following steps 301 and 302. The method shown in Figure 3 may be performed by a first device. Alternatively, the method shown in Figure 3 may be performed by a chip within the first device. Figure 3 illustrates an example in which the method is performed by the first device. It should be noted that the first device in this embodiment of this application may be AP2 or STA2 shown in Figure 1, and subsequent first devices may be AP1 or STA1 shown in Figure 1.

[0051] 301: The second device transmits a PPDU to the first device, where the bandwidth of the PPDU includes multiple 20 MHz subchannels. Correspondingly, the first device may receive the PPDU transmitted by the second device.

[0052] The second device may be one device or multiple devices. Multiple second devices may send one PPDU simultaneously or each send multiple PPDUs.

[0053] For example, as shown in Figure 4, the second device is assumed to include AP1 and STA1, and the first device is assumed to be AP2.

[0054] 1. AP1 may send PPDU1 to STA1.

[0055] 2. AP2 may also receive PPDU1. After receiving PPDU1 transmitted by AP1, AP1 identifies that PPDU1 is from OBSS. The OBSS PD-based space reuse mechanism is triggered to perform a backoff (BO) process with a maximum transmit power of 1. The value of the backoff counter starts and decreases until PPDU1 is received.

[0056] 3. STA1 may transmit PPDU2 to AP1.

[0057] 4. AP2 may also receive PPDU2. After receiving PPDU2 transmitted by STA1, AP2 triggers the OBSS PD-based space reuse mechanism and performs a backoff process with a maximum transmit power of 2.

[0058] After receiving PPDU1 transmitted by AP1, AP2 may further detect a first signal strength 1 of PPDU1 to determine whether AP2 can perform OBSS PD-based spatial reuse. After receiving PPDU2 transmitted by STA1, AP2 may further detect a first signal strength 2 of PPDU2 to determine whether AP2 can perform OBSS PD-based spatial reuse. If the first signal strength 1 of PPDU1 is less than OBSS PD level 1 and the first signal strength 2 of PPDU2 is less than OBSS PD level 2, after the backoff counter reaches 0, AP2 transmits PPDU3 using the smaller of the maximum transmit power 1 and maximum transmit power 2 to perform OBSS PD-based spatial reuse.

[0059] 302: The first device performs OBSS PD-based spatial reuse, where the first signal intensity level of the PPDU received by the first device is less than the OBSS PD level, and the unit of the first signal intensity level is decibel-milliwatt dBm / 20MHz.

[0060] The unit of the first signal strength level being dBm / 20MHz means that the first signal strength level is based on a granularity of 20MHz. For example, the first signal strength level is the signal strength level measured on a single 20MHz subchannel. Alternatively, the first signal strength level is a value obtained by normalizing multiple 20MHz signal strength measurements in 20MHz units.

[0061] In this embodiment of the application, after receiving a PPDU transmitted by a second device, the first device may measure a first signal intensity level of the PPDU. The PPDU may include one or more of the following fields for determining a physical layer clear channel access indication (PHY-CCA indication): an L-STF field (legacy-short training field), an L-LTF field (legacy-long training field), a physical layer synchronization (PHY SYNC) field, a short synchronization (shortSYNC) field, or a long physical layer synchronization (Long PHY SYNC) field. The first device may determine a first signal intensity level in dBm / 20MHz by measuring the signal intensity of one or more fields present in the PPDU and used to determine the physical layer clear channel access indication. (The corresponding explanation in English is as follows: The received signal strength level, in dBm / 20 MHz, which is measured from the L-STF or L-LTF fields in at least one of the nonpunctured 20 MHz subchannels of the PPDU or the PHY SYNC field, short SYNC field, or Long PHY SYNC field, whichever exists (#24235), and which is used to determine PHY-CCA indication, is below the non-SRG OBSS PD level.)

[0062] After the first device determines the first signal intensity level in dBm / 20MHz, the first device can perform OBSS PD-based spatial reuse only when the first signal intensity level of the PPDU is less than the OBSS PD level, and cannot perform OBSS PD-based spatial reuse when the first signal intensity level of the PPDU is equal to or greater than the OBSS PD level. The unit of the OBSS PD level is also dBm / 20MHz.

[0063] In the method described in Figure 3, the first device measures the first signal intensity level of the PPDU at dBm / 20MHz. The signal intensity level of the PPDU can still be successfully measured when the first device cannot receive all 20MHz subchannels of the PPDU's full bandwidth, or when preamble puncturing occurs, or when complete preamble puncturing information cannot be obtained. Compared to techniques for measuring signal intensity levels based on the full bandwidth, which cannot operate or be implemented in these scenarios, the technique for measuring signal intensity levels based on a 20MHz granularity in this embodiment of the application can be implemented in these scenarios. This increases the number of viable scenarios in which OBSS PD-based spatial reuse can be performed, improving overall system throughput. In addition, the IEEE 802.11be standard utilizes a mechanism that performs physical layer clear channel access indication (CCA) detection on each 20 MHz subchannel to determine whether a channel is idle or busy, and the first signal strength level is also obtained by measuring one or more 20 MHz subchannels. Therefore, the method described in Figure 3 is compatible with the IEEE 802.11be standard.

[0064] In possible implementations, the bandwidth of the transmitted PPDU includes multiple 20MHz subchannels, none of which are punctured, and the first signal The intensity level is obtained through measurements based on the signal strength of multiple 20 MHz subchannels within the PPDU.

[0065] In possible implementations, the first signal strength level is obtained based on the signal strength measurements of multiple uncracked 20 MHz subchannels within the PPDU.

[0066] In this possible implementation, the first device specifically lies on multiple unpunctured 20 MHz subchannels within the PPDU and can obtain signal intensity measurements of the multiple unpunctured 20 MHz subchannels within the PPDU by measuring the signal intensity of a field used to determine physical layer clear channel access indication. The multiple unpunctured 20 MHz subchannels may be all or some of the multiple unpunctured 20 MHz subchannels within the PPDU.

[0067] For example, suppose the bandwidth of the PPDU received by the first device is 160 MHz, the PPDU has six uncamplified 20 MHz subchannels, and the first device receives three uncamplified 20 MHz subchannels of the PPDU on the 80 MHz channel in which the first device operates. In this case, the first device can measure the signal strength of the three received uncamplified 20 MHz subchannels. Alternatively, the first device can measure the signal strength of a portion of the three received uncamplified 20 MHz subchannels.

[0068] When signal strength measurements from multiple 20MHz subchannels are normalized to obtain a first signal strength level, the multiple 20MHz subchannels may include punctured 20MHz subchannels, and energy may not be transmitted over the punctured 20MHz subchannels, resulting in an inaccurate first signal strength level or the presence of other signals or interference on the punctured 20MHz subchannels. As a result, the first signal strength level cannot be accurately measured. Therefore, the first device must be precisely triggered to perform OBSS PD-based spatial reuse, and punctured 20MHz subchannels must be excluded.

[0069] In equation (1) above, OBSS_PD level This is the threshold for the entire bandwidth of PPDU1. OBSS_PD level When it is determined, the +log at the end of the expression 10 (PPDU_BW / 20MHz) is used to perform normalization when the bandwidth of PPDU1 exceeds 20MHz, that is, the value of the right-hand side of equation (1) is +log 10 Based on (PPDU_BW / 20MHz), this can be for the entire bandwidth of PPDU1. Preamble puncturing is not considered in this normalization. For example, suppose the bandwidth of PPDU1 is 80MHz. If preamble puncturing is performed on one of the 20MHz subchannels, then three of the four 20MHz subchannels will have energy for transmission, and one 20MHz subchannel will be punctured. In this case, the number of subchannels that need to be normalized is 3, not 4. In this example, it is clear that the number of subchannels to be normalized in equation (1) is 4. Therefore, according to equation (1), it is not possible to precisely trigger AP2 to perform OBSS PD-based spatial reuse. In addition, equation (1) is inaccurate. The log value should be multiplied by 10.

[0070] Optionally, the first signal strength level is obtained by normalizing the signal strength measurements of multiple uncracked 20MHz subchannels within the PPDU. Based on this possible implementation, the determined first signal strength level can be more accurate.

[0071] Optionally, the first signal intensity level satisfies the following equation.

[0072]

number

[0073] Rx_PWR dBm / 20MHz This is the first signal strength level, Rx_PWR nonpunc-measured,total This is the sum of the signal strength measurements of multiple uncropped 20MHz subchannels within the PPDU, and N nonpunc-measured This is the number of multiple punctured 20MHz subchannels measured.

[0074] For example, it is assumed that the first signal strength level is obtained based on the signal strength measurements of uncropped 20MHz subchannels 1 and 2 within the PPDU. The signal strength measurement for uncropped 20MHz subchannel 1 is 10dBm / 20MHz, and the signal strength measurement for uncropped 20MHz subchannel 2 is 20dBm / 20MHz. In this case, Rx_PWR nonpunc-measured,total This is 30 dBm / 20 MHz. nonpunc-measured The answer is 2.

[0075] The conditions for performing OBSS PD-based spatial reuse transmission can also be inferred according to each equation. For example, another condition for performing OBSS PD-based spatial reuse transmission may be that the following equation (3) is satisfied.

[0076]

number

[0077] Optionally, the first device may first acquire puncture information of the PPDU, determine which 20MHz subchannels within the PPDU are punctured based on the puncture information, and then decide to measure the signal strength of the punctured 20MHz subchannels within the PPDU. Based on this optional implementation, when preamble puncture occurs within the PPDU, the first device can acquire the first signal strength in an accurate and viable manner.

[0078] For example, when a PPDU is an HE MU (multiple user) PPDU, puncturing information for the HE MU PPDU may be implicitly carried in the bandwidth field within the HE MU PPDU. Because only some of the puncturing information is carried, it is not possible to provide puncturing information for the entire bandwidth. Puncture information is not carried in HE SU PPDUs or HE TB PPDUs.

[0079] When a PPDU is an EHT MU PPDU, in non-OFDMA transmission of the EHT MU PPDU, the full bandwidth puncturing information resides in the punctured channel information field within the U-SIG field of the EHT MU PPDU.

[0080] When a PPDU is an EHT MU PPDU, in OFDMA transmission of the EHT MU PPDU, puncturing information within the 80 MHz frequency subblock where the PPDU is located resides in the punctured channel information field within the U-SIG field of the EHT MU PPDU, and puncturing information for the entire bandwidth resides in the EHT-SIG field of the EHT MU PPDU.

[0081] When a PPDU is a beacon frame, an invalid subchannel bitmap may be present in the beacon frame, indicating information about certain subchannels that need to be punctured.

[0082] Optionally, the first device may, by blind detection, determine which 20 MHz subchannels are punctured and then measure the signal strength of the punctured 20 MHz subchannels within the PPDU. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal strength in an accurate and viable manner.

[0083] Optionally, multiple unpunctured 20MHz subchannels are placed on the primary channel. The primary channel may be the primary 20MHz channel, primary 40MHz channel, primary 80MHz channel, or primary 160MHz channel. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal strength in an accurate and viable manner.

[0084] The primary 20MHz channel can be any channel within the entire bandwidth, and there is no fixed relationship. For example, the bandwidth is 320MHz. As shown in Figure 5, a 40MHz channel containing the primary 20MHz channel is referred to as the primary 40MHz channel. An 80MHz channel containing the primary 20MHz channel is referred to as the primary 80MHz channel. A 160MHz channel containing the primary 20MHz channel is referred to as the primary 160MHz channel.

[0085] Optionally, multiple unpunctured 20MHz subchannels may be alternatively unpunctured and pre-specified standard 20MHz subchannels within the PPDU. Based on this optional implementation, when preamble puncturing occurs within the PPDU, the first device can obtain the first signal strength in an accurate and viable manner.

[0086] Optionally, multiple unpunctured 20MHz subchannels are the multiple 20MHz channels on which the first device operates. Based on this optional implementation, the first signal strength level obtained through measurement can be more accurate.

[0087] For example, suppose the bandwidth of the PPDU received by the first device is 160 MHz, the PPDU has six uncamplified 20 MHz subchannels, and the first device receives three uncamplified 20 MHz subchannels of the PPDU on an 80 MHz channel in which the first device operates. In this case, the first device may measure the signal strength of the three received uncamplified 20 MHz subchannels, or the first device may measure the signal strength of some of the three received uncamplified 20 MHz subchannels.

[0088] In a possible implementation, the first signal strength level is obtained based on the signal strength measurement result of an unpunctured 20MHz subchannel within the PPDU, which is the primary 20MHz channel.

[0089] Since the primary 20MHz channel is not punctured, the first signal strength level is obtained based on the measurement of the primary 20MHz channel. When preamble puncturing occurs within the PPDU, the first device can obtain the first signal strength in an accurate / workable manner.

[0090] In possible implementations, the first signal strength level is obtained based on the signal strength measurement result of an unpunctured 20MHz subchannel within the PPDU, where an unpunctured 20MHz subchannel is an unpunctured and standard pre-specified 20MHz subchannel within the PPDU.

[0091] In a possible implementation, the first signal strength level is obtained based on the signal strength measurement result of an unpunctured 20MHz subchannel within the PPDU, which is the 20MHz channel on which the first device operates.

[0092] In this embodiment of the application, the specific unpunctured 20 MHz subchannel on which the signal strength is measured is determined on a specific implementation basis, but is not limited to this embodiment of the application.

[0093] In possible implementations, the OBSS PD level satisfies the following equation:

[0094]

number

[0095] OBSS_PD level This corresponds to the OBSS PD level. OBSS_PD min and OBSS_PD max These are OBSS_PD respectively. level These are the minimum and maximum values, which are specified in advance by default or indicated by the AP. TX_PWR ref This is the reference power. For STA, the reference power is 21 dBm. For AP, the reference power is 21 dBm or 25 dBm, depending on the case. TX_PWR is the transmit power when the first device transmits the PPDU.

[0096] Based on this possible implementation, the first signal strength is obtained either through a measurement on an unpunctured 20MHz subchannel of the PPDU, or by normalizing the signal measurement results of multiple unpunctured 20MHz subchannels of the PPDU. In other words, the unit of the first signal strength is decibel-milliwatt-dBm / 20MHz. In addition, OBSS_PD min and OBSS_PD max The unit is also dBm / 20MHz, and in this case, for different bandwidths of PPDU, OBSS_PD level It does not need to be further normalized. This is because OBSS_PD level This helps reduce the complexity of the calculation.

[0097] In possible implementations, TX_PWR satisfies the following equation:

[0098]

number

[0099] OBSS_PD in equation (5) level OBSS_PD is defined in this solution of the present invention and has units of dBm / 20MHz. level That is the case.

[0100] It should be noted here that, in cases where there are no restrictions, the transmitting device must also adhere to the maximum transmit power limited by the regulations.

[0101] It should be noted that OBSS PD-based spatial reuse can be further classified into two types: non-SRG (non-spatial reuse group) OBSS PD levels and SRG OBSS PD levels. OBSS The PD level is used depending on whether an SR group is set up. However, different OBSS The PD level transmission process is essentially the same, and the methods described above can be used in different cases.

[0102] It should be noted that in all embodiments of this application, an example with a unit bandwidth of 20 MHz is used for illustrative purposes, and the unit of the first signal intensity level is dBm / 20 MHz. If the unit bandwidth is other values, e.g., X MHz, the unit of the first signal intensity level in all embodiments of this application can simultaneously be replaced with dBm / X MHz. For example, in the IEEE 802.11ah standard, X = 2 MHz. In the IEEE 802.11ad / ay standard, X = 2160 MHz.

[0103] Figure 6 is a schematic diagram of the structure of a communication device according to an embodiment of this application. The communication device shown in Figure 6 may be configured to perform some or all of the functions of the first device in the method embodiment described in Figure 3. The device may be the first device, a device within the first device, or a device that can be used together with the first device. The communication device may alternatively be a chip system. The communication device shown in Figure 6 may include a communication unit 601 and a processing unit 602. The processing unit 602 is configured to process data. The communication unit 601 is integrated with a receiving unit and a transmitting unit. The communication unit 601 may also be referred to as a transceiver unit. Alternatively, the communication unit 601 may be divided into a receiving unit and a transmitting unit.

[0104] Communication unit 601 is configured to receive a Physical Layer Protocol Data Unit (PPDU) transmitted by a second device, where the bandwidth of the PPDU includes multiple 20 megahertz MHz subchannels. Communication unit 601 is further configured to perform duplicate basic service set packet detection (OBSS PD) based space reuse, where a first signal strength level in the PPDU received by the first device is less than the OBSS PD level, and the unit of the first signal strength level is decibel milliwatts (dBm / 20MHz).

[0105] In possible implementations, the first signal strength level is obtained based on the signal strength measurements of multiple uncracked 20 MHz subchannels within the PPDU.

[0106] In possible implementations, multiple unpunctured 20MHz subchannels are placed on the primary channel.

[0107] In possible implementations, the first signal strength level is obtained by normalizing the signal strength measurements of multiple uncracked 20MHz subchannels within the PPDU.

[0108] In possible implementations,

[0109]

number

[0110] That is Rx_PWR dBm / 20MHz This is the first signal strength level, Rx_PWR nonpuc-measured,total This is the sum of the signal strength measurements of multiple uncropped 20MHz subchannels within the PPDU, and N nonpunc-measured This is the number of multiple punctured 20MHz subchannels measured.

[0111] In a possible implementation, the first signal strength level is obtained based on the signal strength measurement result of an unpunctured 20MHz subchannel within the PPDU, which is either the primary 20MHz channel or the 20MHz channel on which the first device operates.

[0112] In possible implementations,

[0113]

number

[0114] This is OBSS_PD.level This is the OBSS PD level, and OBSS_PD min and OBSS_PD max These are OBSS_PD respectively. level These are the minimum and maximum values ​​of TX_PWR ref is the reference power, and TX_PWR is the transmit power when the second device transmits the PPDU.

[0115] Figure 7 is a schematic diagram of the structure of the communication device. The communication device 700 may be the first device in the above method embodiment, or it may be a chip, chip system, or processor that supports the first device when carrying out the above method. The communication device may be configured to carry out the method described in the above method embodiment. For details, please refer to the description of the above method embodiment.

[0116] The communication device 700 includes one or more processors 701. The processors 701 may be general-purpose processors or dedicated processors. For example, the processor 701 may be a baseband processor or a central processing unit. The baseband processor may be configured to process communication protocols and communication data. The central processing unit may be configured to control communication devices (e.g., base stations, baseband chips, terminals, terminal chips, DUs, or CUs), execute software programs, and process data from the software programs.

[0117] Optionally, the communication device 700 may include one or more memories 702. The memories may store instructions 704, which may be executed on the processor 701, thereby enabling the communication device 700 to perform the method described in the above embodiment. Optionally, the memories 702 may further store data. The processor 701 and the memories 702 may be located separately or integrated together.

[0118] Optionally, the communication device 700 may further include a transceiver 705 and an antenna 706. The transceiver 705 may be referred to as a transceiver unit, transceiver, or transceiver circuit, and is configured to implement transceiver functionality. The transceiver 705 may include a receiver and a transmitter. The receiver may be referred to as a receiver machine or receiver circuit, and is configured to implement receiving functionality. The transmitter may be referred to as a transmitter machine or transmitter circuit, and is configured to implement transmitting functionality. The processing unit 602 shown in Figure 6 may be a processor 701. The communication unit 601 may be a transceiver 705.

[0119] The communication device 700 is a first device, and the processor 701 is configured to perform the data processing operations of the first device in the above-described method embodiment. The transceiver 705 is configured to perform the data reception and transmission operations performed by the first device in the above-described method embodiment. For example, the transceiver 705 may be configured to perform the data reception and transmission operations performed by the first device in Figure 3.

[0120] In other possible designs, the processor 701 may include a transceiver configured to provide receive and transmit functions. For example, the transceiver may be a transceiver circuit, interface, or interface circuit. The transceiver circuit, interface, or interface circuit configured to provide receive and transmit functions may be separate or integrated together. The transceiver circuit, interface, or interface circuit may be configured to read and write code / data. Alternatively, the transceiver circuit, interface, or interface circuit may be configured to transmit or forward signals.

[0121] In other possible designs, the processor 701 may optionally store instructions 703, which are executed on the processor 701, enabling the communication device 700 to perform the method described in the above embodiment. Instructions 703 may be fixed within the processor 701. In this case, the processor 701 may be implemented by hardware.

[0122] In other possible designs, the communication device 700 may include a circuit that can implement the transmit, receive, or communicate functions in the above-described method embodiment. The processor and transceiver described in this embodiment of the application may be mounted on an integrated circuit (IC), analog IC, radio frequency integrated circuit (RFIC), mixed-signal IC, application-specific integrated circuit (ASIC), printed circuit board (PCB), or electronic device. The processor and transceiver may alternatively be manufactured using various IC technologies, such as complementary metal oxide semiconductor (CMOS), n-type metal oxide semiconductor (nMOS), positive channel metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), and gallium arsenide (GaAs).

[0123] The communication device described in the above embodiments may be a first device. However, the scope of the communication devices described in this embodiment of the application is not limited to them, and the structure of the communication device is not limited by Figure 7. The communication device may be a standalone device or part of a larger device. For example, the communication device may be (1) a standalone integrated circuit IC, chip, or chip system or subsystem; (2) a set of one or more ICs, optionally further comprising a storage component configured to store data and instructions; (3) an ASIC, e.g., a modem (MSM); (4) a module that can be incorporated into other devices; (5) a receiver, terminal, intelligent terminal, cellular phone, wireless device, handheld device, mobile unit, in-vehicle device, network device, cloud device, or artificial intelligence device, etc.; or (6) something else.

[0124] When the communication device may be a chip or a chip system, refer to the schematic diagram of the chip structure shown in Figure 8. The chip 800 shown in Figure 8 includes a processor 801 and an interface 802. Optionally, the chip may further include a memory 803. There may be one or more processors 801 and multiple interfaces 802.

[0125] In a certain design, the chip is the first in the embodiment of this application. of In cases where it is configured to implement the functionality of the device, interface 802 is configured to receive or output signals. For example, interface 802 may be configured to perform the signal receiving or output operation of the first device in Figure 3.

[0126] The processor 801 is configured to perform data processing operations for the first device.

[0127] In some scenarios, it may be understood that some optional features in embodiments of this application may be implemented independently of other features, for example, without depending on the solution on which the optional features currently reside, thereby solving the corresponding technical problems and achieving the corresponding effects. Alternatively, in some scenarios, the optional features may be combined with other features based on requirements. Accordingly, the communication devices provided in embodiments of this application may also implement these features or functions. Further details are not described again here.

[0128] The processor in the embodiments of this application may be an integrated circuit chip and should be understood to have signal processing capabilities. In a certain implementation process, the steps in the above-described method embodiment may be completed using hardware integrated logic circuits within the processor or using instructions in the form of software. The above-described processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component.

[0129] The memory in this embodiment of this application may be understood to be volatile memory, non-volatile memory, or to include both volatile and non-volatile memory. Non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (ERASABLE PROM, EPROM), electrically erasable programmable read-only memory (EPROM, EEPROM), or flash memory. Volatile memory may be random access memory (RAM) and may be used as an external cache. Rather than providing a restrictive description, many forms of RAM may be used, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM), and direct rambus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory in the systems and methods described in this specification is not limited to these and any other suitable types of memory.

[0130] This application further provides a computer-readable storage medium for storing computer programs or instructions. When the computer programs or instructions are executed by a communication device, one of the functions of the above-described embodiment of the method is realized.

[0131] This application further provides a computer program product including instructions. When a computer reads and executes the computer program product, the computer is able to implement any one of the functions of the above-described method embodiments.

[0132] All or part of the embodiments described above may be implemented by software, hardware, firmware, or any combination thereof. When software is used for implementation, all or part of the embodiments may be implemented in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer instructions are loaded onto a computer and executed, all or part of the procedures or functions according to the embodiments of this application are generated. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wired means (e.g., coaxial cable, optical fiber, or digital subscriber line (DSL)) or wireless means (e.g., infrared, radio waves, or microwaves). Computer-readable storage media may be any available media accessible by a computer, or a data storage device that integrates one or more available media, such as a server or data center. Available media may be magnetic media (e.g., floppy disks, hard disks, or magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state drives (SSDs)).

[0133] The above description merely outlines the specific implementation of this application and is not intended to limit the scope of protection. Any modifications or substitutions that are readily understood by those skilled in the art within the scope of the technical knowledge disclosed in this application should fall within the scope of protection. Accordingly, the scope of protection of this application should be limited to the scope of protection of the claims.

Claims

1. A method for reusing space, wherein the method for reusing space is A first device receives a Physical Layer Protocol Data Unit (PPDU) transmitted by a second device, wherein the bandwidth of the PPDU includes a plurality of 20 megahertz (MHz) subchannels. A step of performing duplicate basic service set packet detection (OBSS PD) based space reuse by the first device, wherein a first signal strength level of the PPDU received by the first device is less than the OBSS PD level, the unit of the first signal strength level is decibel milliwatts (dBm) / 20MHz, and the first signal strength level is obtained based on the signal strength measurement results of multiple uncropped 20MHz subchannels within the PPDU. A method of reusing space, including...

2. The aforementioned multiple uncanceled 20MHz subchannels are placed on the primary channel. The method for reusing space according to claim 1.

3. The first signal intensity level is obtained by normalizing the signal intensity measurement results of the plurality of punctured 20 MHz subchannels within the PPDU. The method for reusing space according to claim 1 or 2. 【Request Item 4】 【Number 1】 And Rx_PWR dBm / 20MHz This is the first signal intensity level, and Rx_PWR nonpunc-measured,total This is the sum of the signal intensity measurement results of the multiple uncracked 20 MHz subchannels within the PPDU, and N nonpunc-measured This is the number of the measured number of the multiple punctured 20 MHz subchannels. The method for reusing space according to claim 3.

5. A method for reusing space, wherein the method for reusing space is: A first device receives a Physical Layer Protocol Data Unit (PPDU) transmitted by a second device, wherein the bandwidth of the PPDU includes a plurality of 20 megahertz (MHz) subchannels. A step of performing duplicate basic service set packet detection (OBSS PD) based space reuse by the first device, wherein the first signal strength level of the PPDU received by the first device is less than the OBSS PD level, and the unit of the first signal strength level is decibel milliwatts (dBm) / 20MHz, and Includes, The first signal strength level is obtained based on the signal strength measurement result of an unpunctured 20 MHz subchannel within the PPDU, wherein the unpunctured 20 MHz subchannel is the primary 20 MHz channel or the 20 MHz channel on which the first device operates. Space reuse methods.

6. A method for reusing space, wherein the method for reusing space is: A first device receives a Physical Layer Protocol Data Unit (PPDU) transmitted by a second device, wherein the bandwidth of the PPDU includes a plurality of 20 megahertz (MHz) subchannels. A step of performing duplicate basic service set packet detection (OBSS PD) based space reuse by the first device, wherein the first signal strength level of the PPDU received by the first device is less than the OBSS PD level, and the unit of the first signal strength level is decibel milliwatts (dBm) / 20MHz, and Includes, [Math 2] And, OBSS_PD level This is the OBSS PD level, and OBSS_PD min and OBSS_PD max These are OBSS_PD respectively. level These are the minimum and maximum values ​​of TX_PWR ref is the reference power, and TX_PWR is the transmit power when the second device transmits the PPDU. Space reuse methods.

7. A first device, wherein the first device is A communication unit is configured to receive a Physical Layer Protocol Data Unit (PPDU) transmitted by a second device, wherein the bandwidth of the PPDU includes a plurality of 20 megahertz (MHz) subchannels. The communication unit is further configured to perform duplicate basic service set packet detection (OBSS PD) based space reuse, wherein a first signal strength level of the PPDU received by the first device is less than the OBSS PD level, the unit of the first signal strength level is decibel milliwatts (dBm) / 20MHz, and the first signal strength level is obtained based on the signal strength measurement results of multiple uncropped 20MHz subchannels within the PPDU. The first device.

8. The aforementioned multiple uncanceled 20MHz subchannels are placed on the primary channel. The first device according to claim 7.

9. The first signal intensity level is obtained by normalizing the signal intensity measurement results of the plurality of punctured 20 MHz subchannels within the PPDU. The first device according to claim 7 or 8. [Request Item 10] [Number 3] and Rx_PWR dBm / 20MHz is the first signal strength level, Rx_PWR nonpunc-measured,total is the sum of the signal strength measurement results of the plurality of non - punctured 20 MHz sub - channels in the PPDU, and N nonpunc-measured is the number of the measured plurality of non - punctured 20 MHz sub - channels The first device according to claim 9.

11. A first device, wherein the first device is A communication unit is configured to receive a Physical Layer Protocol Data Unit (PPDU) transmitted by a second device, wherein the bandwidth of the PPDU includes a plurality of 20 megahertz (MHz) subchannels. The communication unit is further configured to perform duplicate basic service set packet detection (OBSS PD) based space reuse, wherein the first signal strength level of the PPDU received by the first device is less than the OBSS PD level, and the unit of the first signal strength level is decibel milliwatts (dBm) / 20MHz. The first signal strength level is obtained based on the signal strength measurement result of an unpunctured 20 MHz subchannel within the PPDU, wherein the unpunctured 20 MHz subchannel is the primary 20 MHz channel or the 20 MHz channel on which the first device operates. The first device.

12. A first device, wherein the first device is A communication unit is configured to receive a Physical Layer Protocol Data Unit (PPDU) transmitted by a second device, wherein the bandwidth of the PPDU includes a plurality of 20 megahertz (MHz) subchannels. The communication unit is further configured to perform duplicate basic service set packet detection (OBSS PD) based space reuse, wherein the first signal strength level of the PPDU received by the first device is less than the OBSS PD level, and the unit of the first signal strength level is decibel milliwatts (dBm) / 20MHz. [Math 4] And, OBSS_PD level This is the OBSS PD level, and OBSS_PD min and OBSS_PD max These are OBSS_PD respectively. level These are the minimum and maximum values ​​of TX_PWR ref is the reference power, and TX_PWR is the transmit power when the second device transmits the PPDU. The first device.

13. A first device comprising a processor, memory, and a transceiver, wherein the memory is configured to store a computer program, the transceiver is configured to receive and transmit data, and the processor is configured to execute the computer program stored in the memory to carry out the space reuse method described in any one of claims 1, 2, 5, or 6.

14. A chip comprising a processor and an interface, wherein the processor is coupled to the interface. A chip in which the interface is configured to receive or output signals, and the processor is configured to execute code instructions, thereby performing the space reuse method according to any one of claims 1, 2, 5, or 6.

15. A computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are invoked by a computer, the computer is able to execute the space reuse method described in any one of claims 1, 2, 5, or 6.

16. A computer program, wherein the computer program includes computer program code, and when the computer program code is executed on a computer, the computer is able to perform the space reuse method described in any one of claims 1, 2, 5, or 6.

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