Transmission power control for coordinated spatial reuse in wireless communications

Abstract

Transmission power control techniques related to coordinated spatial reuse (CSR) in wireless communications are described herein. A sharing access point (AP) obtains a transmission opportunity (TXOP) to engage in CSR operation with one or more shared APs regarding communication with one or more non-AP stations (STAs) associated with the sharing AP. The sharing AP controls, within the TXOP, a transmit (Tx) power of at least a first shared AP of the one or more shared APs in the CSR operation.

Description

[0001] Cross-referencing

[0002] This disclosure is part of a non-provisional patent application claiming priority to U.S. Provisional Patent Application No. 63 / 512,915 (filed July 11, 2023), the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure generally relates to wireless communications, and more specifically, to transmission power control for coordinating spatial reuse in wireless communications. Background Technology

[0004] Unless otherwise stated in this section, the methods described in this section do not constitute prior art to the following claims, nor are they considered prior art by virtue of their inclusion in this section.

[0005] In wireless communications, such as Wi-Fi (or WiFi) and wireless local area networks (WLANs) according to one or more Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards, coordinated spatial reuse (CSR) can improve the throughput of a system of multiple access points (APs). CSR differs from spatial reuse based on overlapping basic service set-power detection (OBSS-PD) as defined in IEEE 802.11ax because CSR relies on coordination among multiple APs. In CSR, one AP (referred to herein as a sharing AP) obtains a transmission opportunity (TXOP) and coordinates other APs (referred to herein as shared APs) to participate in spatial reuse within the TXOP. A shared access point (AP) can perform single-user (SU) or multi-user (MU) transmissions, and each associated non-AP station (STA) may receive different signal-to-interference-and-noise ratios (SINRs) from the shared AP. However, at the time of invention, how to control the transmission power in a CSR is undefined. Therefore, a transmission power control solution for CSRs in wireless communication is needed. Summary of the Invention

[0006] The following abstract is for illustrative purposes only and is not intended to limit any aspect. That is, the following abstract aims to introduce the concepts, highlights, benefits, and advantages of the novel and non-obvious techniques described herein. Selected embodiments will be further illustrated in the detailed description. Therefore, the following abstract is not intended to define the essential features of the claims, nor is it intended to define the scope of the claims.

[0007] The purpose of this disclosure is to provide schemes, concepts, designs, techniques, methods, and apparatus related to transmission power control for coordinated spatial reuse (CSR) in wireless communications. It is believed that the aforementioned problems may be solved or otherwise mitigated under the various schemes proposed in this disclosure. Under the various proposed schemes, the transmission power signal may contain information such as: (1) the direct transmission power or power limit of each shared access point (AP); (2) the direct transmission power or power limit of different resource units (RUs) or multi-RUs (MRUs) of each shared AP; (3) the direct transmission power or power limit of a predetermined subchannel of each shared AP; (4) the direct transmission power or power limit of a selected subchannel of each shared AP; and (5) the direct transmission power or power limit of a selected CSR duration for each shared AP. Here, the term "direct transmission power" (or "transmit (Tx) power") refers to the power level that the shared AP directly indicates to the shared AP, at which the shared AP should transmit (e.g., the transmission of one or more physical-layer protocol data units (PPDUs)).

[0008] In one aspect, one method may involve a processor of a shared AP acquiring a transmission opportunity (TXOP) to participate in CSR operations related to one or more shared APs, which involve communication between one or more non-AP stations (STAs) associated with the shared AP. The method may also involve the processor controlling the transmission power of at least one first shared AP during CSR operations within the TXOP.

[0009] In one aspect, one method may involve a processor of the shared AP participating in CSR operations related to the shared AP, which involve communication between one or more non-AP STAs associated with the shared AP. The method may also involve the processor receiving Tx power signaling from the shared AP, which controls the Tx power of the shared AP during CSR operations within the TXOP.

[0010] It is worth noting that, although the description provided herein may be in the context of certain wireless access technologies, networks, and network topologies (such as Wi-Fi), the proposed concepts, schemes, and any variations / derivatives thereof may be implemented in other types of wireless access technologies, networks, and network topologies, such as, but not limited to, WiMax, Bluetooth, ZigBee, and 5G (5G). th Generation (5G) / New Radio (NR), Long-Term Evolution (LTE), LTE-Advanced, LTE-Advanced Pro, Internet of Things (IoT), Industrial IoT (IIoT), and Narrowband IoT (NB-IoT). Therefore, the scope of this disclosure is not limited to the examples described herein. Attached Figure Description

[0011] The accompanying drawings are intended to provide a further understanding of this disclosure and are incorporated into and constitute a part of this disclosure. These drawings illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the disclosure. It should be noted that the drawings are not necessarily to scale, and for clarity of the concepts of the disclosure, the scale of certain components shown may not be proportional to their actual size in an implementation.

[0012] Figure 1 This is a diagram of an example network environment in which various solutions and schemes of this disclosure can be implemented.

[0013] Figure 2 This is a diagram based on an example scenario of this disclosure.

[0014] Figure 3 This is a diagram based on an example scenario of this disclosure.

[0015] Figure 4 This is a diagram based on an example scenario of this disclosure.

[0016] Figure 5 This is a diagram based on an example scenario of this disclosure.

[0017] Figure 6This is a diagram based on an example scenario of this disclosure.

[0018] Figure 7 This is a diagram based on an example scenario of this disclosure.

[0019] Figure 8 This is a diagram based on an example scenario of this disclosure.

[0020] Figure 9 This is a diagram based on an example scenario of this disclosure.

[0021] Figure 10 This is a diagram based on an example scenario of this disclosure.

[0022] Figure 11 This is a diagram based on an example scenario of this disclosure.

[0023] Figure 12 This is a diagram based on an example scenario of this disclosure.

[0024] Figure 13 This is a diagram based on an example scenario of this disclosure.

[0025] Figure 14 This is a block diagram of an example communication system according to an embodiment of the present disclosure.

[0026] Figure 15 This is a flowchart of an example process according to an embodiment of the present disclosure.

[0027] Figure 16 This is a flowchart of an example process according to an embodiment of the present disclosure. Detailed Implementation

[0028] This document discloses detailed embodiments and implementations of the claims. However, it should be understood that the disclosed embodiments and implementations are merely illustrative of the claims, which may be embodied in various forms. This disclosure may be embodied in many different forms and should not be limited to the exemplary embodiments and implementations set forth herein. Rather, these exemplary embodiments and implementations are provided to make the description of this disclosure thorough and complete, and to fully convey the scope of this disclosure to those skilled in the art. In the following description, well-known features and technical details may be omitted to avoid unnecessarily obscuring the presented embodiments and implementations.

[0029] Overview

[0030] The embodiments of this disclosure relate to various techniques, methods, schemes, and / or solutions for transmission power control in coordinated spatial reuse (CSR) in wireless communications. According to this disclosure, many possible solutions can be implemented individually or in combination. That is, while these possible solutions may be described separately below, two or more of these possible solutions may be implemented in one or another combination.

[0031] Figure 1 An example network environment 100 is described, in which various solutions and schemes based on this disclosure can be implemented. Figures 2 to 16 Examples of implementing various proposed solutions according to this disclosure in network environment 100 are illustrated. The following descriptions of the various proposed solutions are for reference only. Figures 1 to 16 Provided.

[0032] refer to Figure 1 Network environment 100 may involve multiple access points (APs) (e.g., APa and APb) and multiple non-AP stations (STAs) (e.g., STAa1 and STAa2). APa and APb can form or otherwise establish a multi-AP (MAP) configuration such that one of APa and APb can be a sharing AP, while the other can be a shared AP. For example, APa can act as a sharing AP, and APb can act as a shared AP. Each of APa and APb can be configured to perform transmission power control in wireless communication to implement the various proposed schemes described below. It is worth noting that although the various proposed schemes may be described individually or separately below, in actual implementation, some or all of the proposed schemes may be used or implemented in combination. Of course, each proposed scheme can be used or implemented individually or separately.

[0033] refer to Figure 1 Non-AP STAs associated with a shared AP (e.g., APa) may see different signal-to-interference-and-noise ratios (SINRs) from the shared AP (e.g., APb). SINR is related to the transmit (Tx) power of both the sharing and shared APs. Furthermore, SINR is also related to the path loss of both the sharing and shared APs. For example, the SINR experienced by non-AP STAa1 and non-AP STAa2 associated with the shared AP is... Figure 1This is shown in the image. For example, a non-AP STAa1 associated with APa (shared AP) might experience a SINR= ,in This represents the signal strength from the shared AP. This represents interference from the shared AP. Furthermore, non-AP STAa2 associated with APa (the shared AP) may experience a SINR= ,in This represents the signal strength from the shared AP. This represents interference from the shared AP. In this simplified example, because the path loss from APb to non-AP STAa2 is greater than the path loss from APb to non-AP STAa1, the SINR of non-AP STAa2 tends to be higher than that of non-AP STAa1.

[0034] Figure 2 An example scenario 200 is shown under the scheme proposed in this disclosure. (Reference) Figure 2 Each non-AP STA (e.g., STAa1 and STAa2) in a shared basic service set (BSS) may have different bandwidths (BW) or may operate in different resource units (RUs) or multi-RUs (MRUs), and may be located at different distances from the sharing AP and the AP being shared. Figure 2In the example shown, the shared AP (APa) might communicate with STAa1 using a 996-tone RU in the lower 80MHz of the 160MHz bandwidth, and with STAa2 using another 996-tone RU in the upper 80MHz of the 160MHz bandwidth. In events where the maximum transmit (Tx) power level is limited by the most severely interfering STA or otherwise, a single power limit might be used for the Tx power. Alternatively, more than one power limit might be utilized, as each of the multiple STAs can limit or otherwise limit the Tx power. According to the proposed scheme, the shared AP might send a transmit power control signaling that includes different transmit power levels, or different RUs or MRUs, or different transmit power limits for different CSR durations for each shared AP. For example, the transmission power signal may indicate one or more of the following: (1) the direct Tx power level; (2) the index of the RU or MRU; (3) equal split in the BW of the physical-layer protocol data unit (PPDU); (4) a bitmap; and (5) a CSR field (if transmitted one by one to the STA). The minimum granularity of the transmission may be 20 MHz.

[0035] Figure 3 An example scenario 300 under the scheme proposed in this disclosure is shown. Scenario 300 may involve a signal triggered by a CSR. Reference Figure 3The Tx power limit may be carried by the CSR trigger frame or otherwise indicated, which may specify the corresponding Tx power limit for each shared AP. For example, the sharing AP (APa) may first transmit a trigger frame, and then, after a short interframe spacing (SIFS), transmit a PPDU to one or more STAs associated with the sharing AP (e.g., non-AP STaa). After receiving the trigger frame from the sharing AP, the shared AP (APb) may transmit a PPDU to one or more STAs associated with the shared AP (e.g., non-AP STab). The shared AP may transmit PPDUs with Tx power limit 1 and Tx power limit 2, corresponding to non-AP STAa and STAb, respectively. Trigger frames may carry or otherwise indicate certain information, including but not limited to, a shared AP identifier (ID), downlink (DL) / uplink (UL), bandwidth, Tx power of the shared AP, transmission opportunity (TXOP) duration, direct Tx power or power limit of the shared AP, number of shared APs (or number of APs), number of RU or MRU indices, RU or MRU index, bitmap, CSR duration, etc.

[0036] Figure 4 An example scenario 400 under the scheme proposed in this disclosure is illustrated. Scenario 400 may involve a trigger frame format. According to the proposed scheme, the trigger frame may be used by the shared AP to notify the shared APs to set Tx power limits and allocate resources. The shared APs may indicate the trigger frame type and the number (or quantity) of shared APs in the Common Info field of the trigger frame. Reference Figure 4 The diagram shows a proposed trigger frame format. A CSR trigger frame may: (1) use the shared AP identifier as the recipient address (RA) if the trigger frame is for a shared AP; or (2) use the broadcast address as the RA and include the shared AP identifier in the User Info field. Furthermore, the User Info field in the CSR trigger frame may indicate (among other things) the shared AP identifier, the direct Tx power or power limit of the shared AP, the number of RU or MRU indices, the RU or MRU index, the bitmap, and the CSR duration. Additionally, the Common Info field in the CSR trigger frame may indicate (among other things) the trigger frame type, bandwidth, DL / UL, the Tx power of the shared AP, and the number (or quantity) of shared APs.

[0037] Figure 5An example scenario 500 under the scheme proposed in this disclosure is illustrated. Scenario 500 may involve the trigger frame type of the CSR. According to the proposed scheme, each trigger frame sent from / by a shared AP may be a new type of trigger frame, and the trigger frame of the CSR may be indicated using a reserved value in the "Trigger Type Subfield Encoding" table, such as... Figure 5 As shown. Alternatively, each trigger frame sent from / by a shared AP may be a variant of an existing new type of trigger frame. For example, a MAP transmission may be triggered by a multi-user request-to-send (MU-RTS) with additional information.

[0038] Figure 6 An example scenario 600 is illustrated under the scheme proposed in this disclosure. Scenario 600 may involve the direct Tx power (power limit) of each shared AP. According to the proposed scheme, the sharing AP may set a Tx power limit (or direct Tx power level) for the shared APs based on its STA scheduling to minimize interference from the shared APs. For example, refer to... Figure 6 The Tx power limit (or direct Tx power level) of the shared AP (APb) may be based on the interference level of the non-AP STAa1 from APb.

[0039] Figure 7 An example scenario 700 under the scheme proposed in this disclosure is illustrated. Scenario 700 may involve RU-based or MRU-based power control. According to the proposed scheme, a shared AP may set Tx power limits (or direct Tx power levels) for the shared APs based on its STA schedule. The shared AP may assign different power limits to each STA or each group of STA-based RUs or MRUs. The number of RU or MRU indices may be indicated before starting a specific power limit. A variation of this proposed scheme may use an n-1 RU or MRU index for all STA RU locations, while the last STA RU location may be assumed to be the bandwidth minus the sum of the other indicated RUs. Reference Figure 7 A shared AP may set or limit the power limits of the shared AP for each STA. Furthermore, a shared AP may group multiple STAs to set a power limit or restriction associated with each group of STAs. The number of RUs / MURs and their corresponding maximum power limits may depend on the operating scenario, design complexity, and the number of RUs or MURs allocated within the shared AP.

[0040] Figure 8An example scenario 800 is illustrated under the scheme proposed according to this disclosure. Scenario 800 may involve the equal division of the PPDU BW. Similar to IEEE 802.11ax parameterized spatial reuse (PSR), under the proposed scheme, the PPDU BW may be equally divided and assigned corresponding power limits (or direct Tx power levels). The number of power limits (or direct Tx power levels) may be predetermined based on the Tx bandwidth. Under this proposed scheme, the signal can be simplified by skipping the number indicator of RU or MRU and the RU or MRU index (introduced in the proposed scheme described in the example scenario 700 above). For example, if the shared AP only allows two different power limits and the bandwidth indicator is 160MHz, each field may be applied to the lowest and highest 80MHz 20MHz sub-channels in the frequency domain, respectively.

[0041] Figure 9 An example scenario 900 under the scheme proposed according to this disclosure is illustrated. Scenario 900 may involve using bitmaps for Tx power control. Under the proposed scheme, the sharing AP can use a bitmap to set Tx power limits (or direct Tx power levels) for the shared AP, where each bit of the bitmap indicates the corresponding Tx power limit or direct Tx power level for the corresponding frequency band or subchannel of the operating bandwidth (e.g., PPDU BW). This can provide additional flexibility in the frequency domain. For example, if the sharing AP allows two different power limits and the operating channel crosses Federal Communications Commission (FCC) boundaries (e.g., 6 GHz Low Power Indoor (LPI) and standard power (SP) modes), the sharing AP may indicate a bitmap with a 20 MHz granularity and different Tx power limits for the shared AP.

[0042] Figure 10 An example scenario 1000 under the scheme proposed according to this disclosure is illustrated. Scenario 1000 may involve STA scheduling by a shared AP. Under the proposed scheme, regarding providing multiple Tx power limits (or direct Tx power levels) to the shared AP, the shared AP may schedule the STAs associated with the shared AP accordingly based on the received signal strength indicator (RSSI) or path loss information of the shared AP / the shared APs. For example, because a certain STA experiences higher interference from a given shared AP, the shared AP may set a lower corresponding Tx power limit (or direct Tx power level) for that particular STA, and vice versa, as... Figure 10 As shown. If the shared AP schedules available resources in ascending (or descending) order of RSSI information, the shared AP may gain more flexibility in scheduling its own STAs. For example, see reference Figure 10 ,like Figure 10 As shown in section (A), in some cases, when two STAs (e.g., STA5 and STA6) are associated with the shared AP, the shared AP may adhere to the most stringent Tx power limits. On the other hand, as... Figure 10 As shown in section (B), under the proposed scheme, the shared AP may have more flexibility to allocate more power to STA6.

[0043] Figure 11 An example scenario 1100 is illustrated under the scheme proposed in this disclosure. Figure 12 An example scenario 1200 under the scheme proposed according to this disclosure is illustrated. Each of scenarios 1100 and 1200 may involve implementation options for multiple Tx power limits in the frequency domain. Specifically, scenario 1100 may involve independent coding implementation, and scenario 1200 may involve joint coding implementation. Under the proposed scheme, in orthogonal frequency-division multiple access (OFDMA) operation, multiple encoders can be used, and in single-user (SU) transmission, one or more options can be used for unequal power, quadrature amplitude modulation (QAM), and modulation and coding scheme (MCS) transmission. The first option may involve increasing the power spectral density (PSD) while maintaining the same MCS. The second option may involve increasing the PSD and coding with an increased MCS level and using an independent coding scheme. The third option may involve increasing the PSD and coding with an increased QAM level and using a joint coding scheme.

[0044] Figure 13An example scenario 1300 under the scheme proposed according to this disclosure is illustrated. Scenario 1300 may involve multiple Tx power controls in the time domain. Under the proposed scheme, during CSR operation, the shared AP can perform multi-user (MU) or SU transmissions, and the shared AP can transmit to multiple STAs one by one within a TXOP. More specifically, the shared AP can indicate multiple Tx power limits and duration information to the shared APs. Under the proposed scheme, a CSR duration indicator can be used to indicate the duration or Tx start time. For example, non-AP STAa1 may be subject to more interference from APb, therefore, during CSR duration 1, non-AP STAa1 may request stricter Tx power limits. Meanwhile, since the shared AP communicates with non-AP STAa2, the power limits of the shared APs may be relaxed during CSR duration 2.

[0045] Illustrated Example

[0046] Figure 14 An example system 1400, comprising at least one example device 1410 and one example device 1420, is described in accordance with this disclosure. One or both of devices 1410 and 1420 may perform various functions to implement the schemes, techniques, processes, and methods described herein concerning transmit power control (CSR) in wireless communications, including the various schemes for the proposed designs, concepts, schemes, systems, and methods described above, as well as the processes described below. For example, device 1410 may be implemented in a shared access point (AP), while device 1420 may be implemented in a shared AP, or vice versa.

[0047] Each of devices 1410 and 1420 may be part of an electronic device, which may be a non-AP multi-link device (MLD) or AP MLD, such as a portable or mobile device, wearable device, wireless communication device, or computing device. When implemented in a non-AP MLD, each of devices 1410 and 1420 may be implemented in a smartphone, smartwatch, personal digital assistant, digital camera, or computing device, such as a tablet, laptop, or notebook computer. Each of devices 1410 and 1420 may also be part of a machine-type device, which may be an IoT device, such as a fixed or stationary device, home appliance, wired communication device, or computing device. For example, each of devices 1410 and 1420 may be implemented in a smart thermostat, smart refrigerator, smart door lock, wireless speaker, or home control center. When implemented in or as a network device, devices 1410 and / or 1420 may be implemented in a network node, such as an AP (e.g., a shared AP or an AP being shared).

[0048] In some embodiments, devices 1410 and 1420 may be implemented as one or more integrated circuit (IC) chips, such as, but not limited to, one or more single-core processors, one or more multi-core processors, one or more reduced-instruction-set computing (RISC) processors, or one or more complex-instruction-set computing (CISC) processors. In the various embodiments described above, devices 1410 and 1420 may be implemented as or act as a shared access point (AP) or be shared by an AP. Devices 1410 and 1420 may include at least some of the components shown in Figure 14, such as processors 1412 and 1422, respectively. Devices 1410 and 1420 may also include one or more other components unrelated to this disclosure (e.g., internal power supply, display device, and / or user interface device); therefore, for simplicity and brevity, these components of devices 1410 and 1420 are... Figure 14 It is not shown in the text, nor is it described below.

[0049] On one hand, processors 1412 and 1422 may be implemented as one or more single-core processors, one or more multi-core processors, one or more RISC processors, or one or more CISC processors. That is, although the singular term "one processor" is used herein to refer to processors 1412 and 1422, in some embodiments processors 1412 and 1422 may include multiple processors, while in other embodiments they may include a single processor, as is consistent with this disclosure. On the other hand, processors 1412 and 1422 may be implemented in hardware (and, optionally, firmware), whose electronic components include, for example, but not limited to, one or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors, and / or one or more variable capacitors, all configured and arranged in accordance with this disclosure to achieve a particular purpose. In other words, in at least some embodiments, processor 1412 and processor 1422 are special purpose machines specifically designed, arranged, and configured to perform specific tasks, including transmission power control of CSR in wireless communications, consistent with various embodiments of this disclosure.

[0050] In some embodiments, device 1410 may further include one or more transceivers 1416 connected to processor 1412. Each or more transceivers 1416 may include a transmitter capable of wireless transmission and a receiver capable of wirelessly receiving data. In some embodiments, device 1420 may further include one or more transceivers 1426 connected to processor 1422. Each or more transceivers 1426 may include a transmitter capable of wireless transmission and a receiver capable of wirelessly receiving data. It is worth noting that, although Figure 14 Only one transceiver 1416 / 1426 is shown in the image. In some embodiments, device 1410 and / or device 1420 may be equipped with multiple transceivers 1416 or multiple transceivers 1426.

[0051] In some embodiments, device 1410 may further include a memory 1414 connected to processor 1412, the memory 1414 being accessible by processor 1412 and storing data in memory 1414. In some embodiments, device 1420 may further include a memory 1424 connected to processor 1422, the memory 1424 being accessible by processor 1422 and storing data in memory 1424. Each of memory 1414 and memory 1424 may include a random-access memory (RAM), such as dynamic RAM (DRAM), static RAM (SRAM), thyristor RAM (T-RAM), and / or zero-capacitor RAM (Z-RAM). Alternatively, each of memory 1414 and memory 1424 may further include a read-only memory (ROM), such as a mask ROM, a programmable ROM (PROM), an erasable programmable ROM (EPROM), and / or an electrically erasable programmable ROM (EEPROM). Alternatively, each of memory 1414 and memory 1424 may further include a non-volatile random-access memory (NVRAM), such as flash memory, solid-state memory, ferroelectric RAM (FeRAM), magnetoresistive RAM (MRAM), and / or phase-change memory.

[0052] Devices 1410 and 1420 can be communication entities capable of communicating with each other using various proposed schemes, as is consistent with this disclosure. For illustrative purposes and without limiting the scope, the following description of the capabilities of device 1410 as a shared access point and device 1420 as a shared access point is provided in the context of example flows 1500 and 1600. It is worth noting that although the example embodiments described below are provided in the context of WLAN, they can also be implemented in other types of networks. It is also worth noting that although the examples described below are provided in the context of device 1410, these examples may also be applicable to or implemented by device 1420.

[0053] Example Process

[0054] Figure 15 An example flow 1500 conforming to embodiments of this disclosure is illustrated. Flow 1500 may represent one aspect of implementing various proposed designs, concepts, schemes, systems, and methods described above. More specifically, flow 1500 may represent one aspect of proposed concepts and schemes relating to transmission power control of CSR in wireless communications, which is consistent with this disclosure. Flow 1500 may include one or more operations, actions, or functions, as shown in one or more blocks. Although shown as independent blocks, the individual blocks of flow 1500 may be divided into more blocks, merged into fewer blocks, or eliminated according to desired embodiments. Furthermore, the blocks / sub-blocks of flow 1500 may be executed in the order shown in Figure 15, or they may be executed in a different order. Furthermore, one or more blocks / sub-blocks of flow 1500 may be executed repeatedly or iteratively. Flow 1500 may be implemented by means of apparatus 1410 and apparatus 1420, and variations thereof. For illustrative purposes only and without limitation, process 1500 is described below as follows: in a network environment 100 of a wireless network (e.g., WLAN), device 1410 is implemented as or as a shared AP (e.g., APa) and device 1420 is implemented as or as a shared AP (e.g., APb) according to one or more IEEE 802.11 standards. Process 1500 may begin at block 1510.

[0055] At 1510, process 1500 may involve the processor 1412 of device 1410 (as a shared AP) obtaining a TXOP via transceiver 1416 to participate in CSR operations with one or more shared APs (regarding communication with one or more non-AP STAs associated with the shared AP). Process 1500 can proceed from 1510 to 1520.

[0056] At 1520, process 1500 may involve processor 1412 controlling the Tx power of at least the first shared AP (e.g., device 1420) of one or more shared APs in CSR operation within TXOP via transceiver 1416.

[0057] In some embodiments, in order to control the Tx power of at least a first shared AP of one or more shared APs, process 1500 may involve processor 1412 controlling at least one of the following: (a) the direct Tx power level or Tx power limit of each shared AP; (b) the direct Tx power level or Tx power limit of different RUs or MRUs of each shared AP; (c) the direct Tx power level or Tx power limit of a predetermined or selected subchannel of each shared AP; and (d) the direct Tx power level or Tx power limit of a selected CSR duration of each shared AP.

[0058] In some embodiments, to control the Tx power of the first shared AP, process 1500 may involve processor 1412 transmitting a Tx power signal indicating the ID of the first shared AP and information related to controlling the Tx power of the first shared AP. In some embodiments, the information related to controlling the Tx power of the first shared AP may include one or more of the following: (i) the direct Tx power level or Tx power limit of the first shared AP; (ii) the number of one or more shared APs; (iii) the number of RUs or MRUs; (iv) the RU or MRU index; (v) a bitmap; and (vi) the CSR duration.

[0059] In some embodiments, the Tx power signal may include a trigger frame used by the sharing AP to control the Tx power of at least a first shared AP and allocate resources. In some embodiments, the trigger frame may indicate: (a) the ID of the first shared AP as the RA; or (b) the broadcast address of the RA, with the ID of the first shared AP indicated in the user information field of the trigger frame. In some embodiments, the common information field of the trigger frame may indicate the number of one or more shared APs and a trigger frame type, the trigger frame type indicating that the trigger frame is used for CSR operation. Furthermore, the user information field of the trigger frame may indicate one or more of the direct Tx power level or Tx power limit of the first shared AP, the number of RUs or MRUs, the RU or MRU index, a bitmap, and the CSR duration. In some embodiments, the trigger frame may include: (a) a new type of trigger frame using reserved values ​​in the trigger type subfield encoding table to indicate that the trigger frame is used for CSR operation; or (b) a variant of an existing type of trigger frame.

[0060] In some embodiments, in order to control the Tx power of at least the first shared AP of one or more shared APs, process 1500 may involve processor 1412 setting a Tx power limit or direct Tx power level for each of one or more shared APs based on the scheduling of one or more non-AP STAs.

[0061] In some embodiments, to control the Tx power of at least a first shared AP of one or more shared APs, process 1500 may involve processor 1412 assigning different power limits to each group of at least a first shared AP or STA for each of the one or more non-AP STAs, based on one or more RUs or MRUs corresponding to one or more non-AP STAs. In some embodiments, to control the Tx power of at least a first shared AP of one or more shared APs, process 1500 may further involve processor 1412 transmitting a trigger frame indicating the ID of the first shared AP, the number of RU or MRU indices, and a corresponding RU or MRU index and a corresponding maximum Tx power for each of the one or more RUs or MRUs. In some embodiments, to assign different power limits to at least a first shared AP, process 1500 may involve processor 1412 performing certain operations. For example, process 1500 may involve processor 1412 dividing the PPDU bandwidth into multiple segments divided by a different number of power limits. In addition, process 1500 may involve processor 1412 assigning each different power limit to a corresponding segment among multiple segments.

[0062] In some embodiments, in order to control the Tx power of at least the first shared AP of one or more shared APs, process 1500 may involve processor 1412 providing a bitmap, where each bit in the bitmap indicates a corresponding Tx power limit or direct Tx power level corresponding to a corresponding frequency band or subchannel of the operating bandwidth.

[0063] In some embodiments, in order to control the Tx power of at least the first shared AP of one or more shared APs, process 1500 may involve processor 1412 scheduling each of one or more non-AP STAs according to the corresponding RSSI or path loss of at least the first shared AP.

[0064] In some embodiments, in order to control the Tx power of at least a first shared AP of one or more shared APs, process 1500 may involve processor 1412 causing at least a first shared AP to transmit, the method including: (a) increasing PSD while maintaining the same MCS; or (b) increasing PSD and encoding with increased MCS and using an independent coding scheme; or (c) increasing PSD and encoding with increased QAM level and using a joint coding scheme.

[0065] In some embodiments, in order to control the Tx power of at least a first shared AP of one or more shared APs, process 1500 may involve processor 1412 indicating one or more Tx power limits and one or more CSR durations to at least the first shared AP, wherein each Tx power limit corresponds to each CSR duration.

[0066] Figure 16 An example flow 1600 conforming to an embodiment of this disclosure is illustrated. Flow 1600 may represent one aspect of implementing the various designs, concepts, schemes, systems, and methods proposed above. More specifically, flow 1600 may represent one aspect of proposed concepts and schemes related to transmission power control of CSR in wireless communication. Flow 1600 may include one or more operations, actions, or functions, as shown in one or more blocks. Although shown as independent blocks, the individual blocks of flow 1600 may be divided into more blocks, merged into fewer blocks, or eliminated depending on the desired implementation. Furthermore, the blocks / sub-blocks of flow 1600 may be arranged according to... Figure 16 The execution order shown in the diagram may be different. Furthermore, one or more blocks / subblocks of process 1600 may be executed repeatedly or iteratively. Process 1600 may be implemented by devices 1410 and 1420, and variations thereof. For illustrative purposes only and without limitation, process 1600 is described below in a network environment 100 where device 1410 is implemented as or as a shared AP (e.g., APa) and device 1420 is implemented as or as a shared AP (e.g., APb). Process 1600 may begin with block 1610.

[0067] At 1610, process 1600 may involve the processor 1422 of device 1420 (as a shared AP) participating in CSR operations with the shared AP (e.g., device 1410) via transceiver 1426 for communication with one or more non-AP STAs of the shared AP. Process 1600 can proceed from 1610 to 1620.

[0068] At 1620, program 1600 may involve processor 1422 receiving a Tx power signal from the shared AP via transceiver 1426, which controls the Tx power of the shared AP during CSR operation within TXOP.

[0069] In some embodiments, the Tx power signal may control at least one of the following: (a) the direct Tx power level or Tx power limit of the shared AP; (b) the direct Tx power level or Tx power limit of different RUs or MRUs of the shared AP; (c) the direct Tx power level or Tx power limit of a predetermined or selected subchannel of the shared AP; and (d) the direct Tx power level or Tx power limit of a selected CSR duration of the shared AP.

[0070] In some embodiments, upon receiving a Tx power signal, procedure 1600 may involve processor 1422 receiving a trigger frame indicating the ID of the shared AP and information related to controlling the Tx power of the shared AP. In some embodiments, the information related to controlling the Tx power of the first shared AP may include one or more of the following: (i) the direct Tx power level or Tx power limit of the shared AP; (ii) the number of one or more shared APs; (iii) the number of RUs or MRUs; (iv) the RU or MRU index; (v) a bitmap; and (vi) the CSR duration.

[0071] Additional Notes

[0072] The subject matter of the claims described herein sometimes illustrates different components contained within or connected to different other components. It should be understood that the architectures depicted are merely examples, and many other architectures can actually be implemented to achieve the same functionality. Conceptually, any arrangement of components to achieve the same function is actually “related” in order to achieve the desired function. Therefore, any combination of any two components here to achieve a particular function can be considered “related” to each other in order to achieve the desired function, regardless of the architecture or intermediate components. Similarly, any two such related components can also be considered “operably connected” or “operably coupled” to each other to achieve the desired function, and any two components that are so related can also be considered “operably coupled” to each other to achieve the desired function. Specific examples of operably coupled components include, but are not limited to, physically matable and / or physically interactive components and / or wirelessly interactive and / or logically interactive and / or logically interactive components.

[0073] Furthermore, regarding any substantially plural and / or singular terms used herein, those skilled in the art may translate from plural to singular and / or from singular to plural depending on the context and / or application. Various singular / plural arrangements may be explicitly set forth herein for clarity.

[0074] Furthermore, those skilled in the art will understand that, in general, the terms used herein, particularly in the appended claims, such as the body of a claim, are typically considered "open" terms. For example, the term "comprising" should be interpreted as "comprising but not limited to," the term "having" should be interpreted as "having at least," the term "including" should be interpreted as "including but not limited to," and so on. Those skilled in the art will also further understand that if a particular number of introduced claim statements are intentional, such intention will be explicitly stated in the claims, and there is no such intention without such a statement. For example, as an aid to understanding, the appended claims may contain the use of introductory phrases "at least one" and "one or more" to introduce claim statements. However, the use of such phrases should not be construed as implying that claim statements introduced by the indefinite article "a" or "a" limit any particular claim containing such introduced claim statements to containing only one such statement, even if the same claim includes the introductory phrase "one or more" or "at least one" and indefinite articles such as "a" or "a," for example, "a" and / or "a" should be interpreted as "at least one" or "one or more"; the same applies to the use of definite articles to introduce claim statements. Furthermore, even if a specific number of claims is explicitly stated, those skilled in the art will recognize that such a statement should be interpreted as at least the stated number; for example, simply stating "two statements" without any other modifiers means at least two statements, or two or more statements. Moreover, when using conventions such as "at least one A, B, and C, etc.", such a construction is generally intended in the conventional sense that those skilled in the art would understand. For example, "a system having at least one A, B, and C" includes, but is not limited to, systems with only A, only B, only C, A and B, A and C, B and C, and / or systems with A, B, and C, etc. Similarly, when using conventions such as "at least one A, B, or C, etc.", such a construction is generally intended in the conventional sense that those skilled in the art would understand. For example, "a system having at least one A, B, or C" includes, but is not limited to, systems with only A, only B, only C, A and B, A and C, B and C, and / or systems with A, B, and C, etc. Those skilled in the art will further understand that virtually any divergent word and / or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to include the possibility of containing one, any, or both terms. For example, the phrase “A or B” would be understood to include the possibility of “A” or “B” or “A and B”.

[0075] As can be seen from the foregoing, various embodiments of this disclosure have been described herein for illustrative purposes, and various modifications can be made without departing from the scope and spirit of this disclosure. Therefore, the various embodiments disclosed herein are not intended to be limiting, and the true scope and spirit are indicated by the following claims.

Claims

1. A method comprising: A processor of a shared access point obtains a transmission opportunity to participate in a coordinated space reuse operation with one or more shared access points, which communicate with one or more non-access point sites associated with the shared access point. as well as The processor controls the transmission power of at least one first shared access point of the one or more shared access points within the transmission opportunity during the coordinated space reuse operation.

2. The method of claim 1, wherein controlling the transmission power of the at least first shared access point of the one or more shared access points includes controlling at least one of the following: A direct transmission power level or a transmission power limit for each shared access point; A direct transmission power level or a transmission power limit for each of the multiple resource units or multiple resource units of a shared access point; A direct transmission power level or a transmission power limit for multiple predetermined or selected sub-channels of each shared access point; and For each shared access point, a selected coordination space reuse duration includes a direct transmission power level or a transmission power limit.

3. The method of claim 1, wherein controlling the transmission power of the first shared access point includes transmitting a transmission power signal indicating an identifier of the first shared access point and a plurality of pieces of information related to controlling the transmission power of the first shared access point.

4. The method of claim 3, wherein the plurality of information related to controlling a transmission power of the first shared access point includes one or more of the following: The first shared access point has a direct transmission power level or a transmission power limit; The number of one or more shared access points; A quantity of multiple resource units or multiple multi-resource units; One resource unit index or one or more resource unit indexes; One image; The duration of space reuse in coordination.

5. The method of claim 3, wherein the trigger frame indicates: An identifier of the first shared access point serves as a receiving address; or A broadcast address is used as the receiving address, and the identifier of the first shared access point is indicated in a user information field of the trigger frame.

6. The method of claim 3, wherein a common information field of the trigger frame indicates the number of the one or more shared access points and a trigger frame type, the trigger frame type indicating that the trigger frame is used for the coordinated space reuse operation, and wherein a user information field of the trigger frame indicates one or more of the direct transmission power level or a transmission power limit of the first shared access point, the number of the plurality of resource units or the plurality of multi-resource units, the resource unit index or the multi-resource unit index, the bitmap, and the coordinated space reuse duration.

7. The method of claim 6, wherein the trigger frame comprises: A new type of trigger frame, using a reserved value in a trigger type subfield encoding table to indicate that the trigger frame is used for the coordination space reuse operation; or A variant of an existing type of trigger frame.

8. The method of claim 1, wherein controlling the transmission power of the at least first shared access point of the one or more shared access points comprises: Based on the scheduling of the one or more non-access point sites, set a transmission power limit or a direct transmission power level for each of the one or more shared access points.

9. The method of claim 1, wherein controlling the transmission power of the at least first shared access point of the one or more shared access points comprises: Based on one or more resource units or one or more multiple resource units corresponding to the one or more non-access point sites, multiple different power limits are assigned to each group of the at least first shared access point or multiple sites for each of the one or more non-access point sites.

10. The method of claim 9, wherein controlling the transmission power of the at least first shared access point of the one or more shared access points further comprises: A trigger frame is transmitted, which indicates an identifier of the first shared access point, a number of resource unit indices or multiple resource unit indices, and a corresponding resource unit index or multiple resource unit index and a corresponding maximum transmission power for each of the one or more resource units or multiple resource units.

11. The method of claim 1, wherein assigning the plurality of different power limits to the at least first shared access point comprises: The bandwidth of a physical layer protocol data unit is divided into multiple segments according to the number of different power limits; as well as Each of the multiple different power limits is assigned to a corresponding segment among the multiple segments.

12. The method of claim 1, wherein controlling the transmission power of the at least first shared access point of the one or more shared access points comprises: A bitmap is provided, each bit indicating a corresponding transmit power limit or a direct transmit power level, corresponding to a corresponding frequency band or a corresponding subchannel of an operating bandwidth.

13. The method of claim 1, wherein controlling the transmission power of the at least first shared access point of the one or more shared access points comprises: Schedule each of the one or more non-access point sites based on a corresponding receive signal strength indication or a corresponding path loss of the at least first shared access point.

14. The method of claim 1, wherein controlling the transmission power of the at least first shared access point of the one or more shared access points comprises enabling the at least first shared access point to perform single-user transmission, the method being: Increase the power spectral density while maintaining the same modulation and coding scheme; or Use an independent coding scheme and perform modulation and coding scheme level enhancement to improve the power spectral density; or A joint coding scheme is used, and orthogonal amplitude modulation level boosting is performed to improve the power spectral density.

15. The method of claim 1, wherein controlling the transmission power of the at least first shared access point of the one or more shared access points includes indicating to the at least first shared access point one or more transmission power limits and one or more coordinated space reuse durations, wherein each of the one or more transmission power limits corresponds to each of the one or more coordinated space reuse durations.

16. A method comprising: A coordinated space reuse operation in which a processor of a shared access point participates in communication with one or more non-access point sites of the shared access point. as well as The processor receives a transmission power signal from the shared access point that controls the transmission power of the shared access point during a transmission opportunity in the coordinated space reuse operation.

17. The method of claim 16, wherein the transmission power signal control comprises at least one of the following: The shared access point has a direct transmission power level or a transmission power limit; The shared access point has a direct transmission power level or a transmission power limit for multiple resource units or multiple resource units; A direct transmission power level or a transmission power limit for multiple predetermined or selected sub-channels of the shared access point; and The shared access point has a selected coordination space reuse duration, a direct transmission power level, or a transmission power limit.

18. The method of claim 16, wherein receiving the transmission power signal includes receiving a trigger frame indicating an identifier of the shared access point and a plurality of information related to controlling the transmission power of the shared access point.

19. As claimed in claim 18, wherein the plurality of information related to controlling a transmission power of the first shared access point includes one or more of the following: The first shared access point has a direct transmission power level or a transmission power limit; The number of one or more shared access points; A quantity of multiple resource units or multiple multi-resource units; One resource unit index or one or more resource unit indexes; One image; The duration of space reuse in coordination.

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