TWI764739B - Multi-user downlink orthogonal frequency-division multiple access (ofdma) configuration method - Google Patents

Abstract

The present invention provides a multi-user downlink orthogonal frequency-division multiple access (OFDMA) configuration method, which includes: assigning contiguous resource units (RUs) included in a channel to a plurality of stations, respectively; and assigning, by an access point (AP), one modulation and coding scheme (MCS) to each of the plurality of stations. Data rates of modulation and coding schemes that are assigned to first stations and associated with contiguous first RUs assigned to the first stations are monotonic, where the first stations are included in the plurality of stations.

Description

Multi-user downlink orthogonal frequency division multiplexing access configuration method

The present invention relates to wireless communication, and more particularly, to a multi-user (multi-user) downlink (downlink) orthogonal frequency-division multiple access (orthogonal frequency-division multiple access, OFDMA) configuration method.

With the rapid growth of Wi-Fi usage in businesses and public spaces, WiFi technology needs to evolve further to meet new requirements. In the 2.4GHz and 5GHz bands, the amount of unlicensed spectrum is limited, which means that each access point (AP) needs to serve more users simultaneously in high-density scenarios. Recently, IEEE 802.11ax (also known as Wi-Fi 6), which introduces fundamental improvements to wireless local area networks (WLANs), has been approved as the next-generation WLAN technology. Orthogonal frequency-division multiple access (OFDMA) is one of the most important technical enhancements in IEEE 802.11ax. OFDMA is a multi-user technique that enables one AP to communicate with multiple stations/users simultaneously in an efficient WLAN. To maximize the downlink throughput between the AP and the station/user, the AP should set the OFDMA configuration correctly to mitigate the impact on the downlink throughput. For example, downlink throughput degradation may be due to transmit (TX) impairments (eg, intermodulation, image rejection ratio, harmonic distortion, and spurs) and/or receive (RX) impairments (eg, thermal noise) , intermodulation, image rejection ratio, phase noise and spurs). Therefore, there is a need for an innovative multi-user downlink OFDMA configuration method that enables correct allocation Modulation and coding schemes, transmit power levels and/or resource element sizes to optimize downlink throughput.

In view of this, the present invention needs to provide a novel multi-user downlink OFDMA configuration method.

According to a first aspect of the present invention, an exemplary multi-user downlink orthogonal frequency division multiple access (OFDMA) configuration method is disclosed. The exemplary multi-user downlink OFDMA configuration method includes: allocating consecutive resource units (RUs) included in a channel to a plurality of stations, respectively; and providing each station of the plurality of stations through an access point (AP). Allocating a modulation and coding scheme (MCS), wherein the data rate of the modulation and coding scheme allocated to the first station and associated with consecutive first RUs allocated to the first station is monotonic, wherein the first station A station is included in the plurality of stations.

According to a second aspect of the present invention, an exemplary multi-user downlink orthogonal frequency division multiple access (OFDMA) configuration method is disclosed. The exemplary multi-user downlink OFDMA configuration method includes: allocating consecutive RUs included in a channel to a plurality of stations, respectively; and determining, by the AP, an RU size of the consecutive RUs, wherein consecutive first RUs allocated to the first station The RU size of the RU is monotonic, wherein the first station is included in the plurality of stations.

The multi-user downlink OFDMA configuration method of the present invention makes it possible to correctly allocate modulation and coding schemes, transmission power levels and/or resource unit sizes, optimize downlink throughput and improve transmission performance.

These and other objects of the present invention will no doubt become apparent to those skilled in the art after reading the following detailed description of the preferred embodiments shown in conjunction with the various drawings.

100: Wireless Communication System

102: Access Point

104_1, 104_2, ..., 104_N: Station

The invention is shown by way of example and not limitation in the figures of the accompanying drawings, in which like reference numerals refer to like elements. When a particular feature, structure or characteristic is described in connection with one embodiment, it should be considered that it is within the knowledge of those skilled in the art to implement such feature, structure or characteristic in connection with other embodiments, whether or not expressly indicated.

FIG. 1 is a schematic diagram illustrating a wireless communication system according to an embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating a first MCS allocation scenario according to an embodiment of the present invention.

FIG. 3 is a schematic diagram illustrating a second MCS allocation scenario according to an embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating a third MCS allocation scenario according to an embodiment of the present invention.

FIG. 5 is a schematic diagram illustrating a fourth MCS allocation scenario according to an embodiment of the present invention.

FIG. 6 is a schematic diagram illustrating a first RU size allocation scenario according to an embodiment of the present invention.

FIG. 7 is a schematic diagram illustrating a second RU size allocation scenario according to an embodiment of the present invention.

FIG. 8 is a schematic diagram illustrating a third RU size allocation scenario according to an embodiment of the present invention.

FIG. 9 is a schematic diagram illustrating a fourth RU size allocation scenario according to an embodiment of the present invention.

FIG. 10 is a schematic diagram illustrating a first transmission power allocation scenario according to an embodiment of the present invention.

FIG. 11 is a schematic diagram illustrating a second transmission power allocation scenario according to an embodiment of the present invention.

FIG. 12 is a schematic diagram illustrating a third transmission power allocation scenario according to an embodiment of the present invention.

FIG. 13 is a schematic diagram illustrating a fourth transmission power allocation scenario according to an embodiment of the present invention.

Figures 14 to 17 are schematic diagrams illustrating different multi-user downlink OFDMA configurations applying setting constraints to RU size allocation, MCS allocation and transmit power allocation according to embodiments of the present invention.

Certain terms are used throughout the specification and claims to refer to particular elements. It should be understood by those skilled in the art that electronic device manufacturers may refer to the same element by different nouns. This specification and the scope of the patent application do not use the difference in name as a way to distinguish elements, but The difference in function of the components is used as the basis for differentiation. The "comprising" mentioned in the entire specification and the subsequent scope of the patent application is an open-ended term, so it should be interpreted as "including but not limited to". Furthermore, the term "coupled" herein includes any means of direct and indirect electrical connection. Therefore, if it is described herein that the first device is electrically connected to the second device, it means that the first device can be directly connected to the second device or indirectly connected to the second device through other devices or connecting means.

FIG. 1 is a schematic diagram illustrating a wireless communication system according to an embodiment of the present invention. The wireless communication system 100 may be a Wi-Fi system employing OFDMA for multi-user downlink communication. For example, the wireless communication system 100 may be IEEE 802.11ax compliant. As shown in FIG. 1, the wireless communication system 100 includes an access point (AP) 102 and a plurality of stations (STAs) 104_1, 104_2, . . . , 104_N. The number N of stations involved in multi-user downlink OFDMA is a positive integer not less than 2. The AP 102 adopts the proposed multi-user downlink OFDMA configuration method to configure the downlink settings S_1, S_2, ..., S_N for communicating with the stations 104_1, 104_2, ..., 104_N, respectively. For example, each downlink setting S_1-S_N may include resource unit (RU) configuration, modulation and coding scheme (MCS) setting, transmit power level setting, or a combination of these, where RU configuration RU size and/or RU location may be included. The proposed multi-user downlink OFDMA configuration method can apply setting constraints to at least one of RU size allocation, MCS allocation, and transmit power level allocation. For example, setting constraints may include monotonic functions for setting downlink parameters (eg, RU size, MCS, or transmit power) or symmetric functions for setting downlink parameters (eg, RU size, MCS, or transmit power).

According to IEEE 802.11ax, a 20/40/80/160MHz channel is divided into multiple resource units (RUs) through OFDMA, and one packet (packet) can be used by multiple users. Each RU allocated in a 20/40/80/160MHz channel can be further divided into sub-carriers, also known as "tones", each sub-carrier having a width of 78.125KHz. Taking a 20MHz channel as an example, one RU can contain 26, 52, 106 or 242 tones, where a 26-tone RU corresponds to an RU size of about 2MHz, A 52-tone RU corresponds to an RU size of about 4 MHz, a 106-tone RU corresponds to an RU size of about 8 MHz, and a 242-tone RU corresponds to an RU size of about 20 MHz.

According to the proposed multi-user downlink OFDMA configuration method, through OFDMA one packet can be used by multiple users (eg, stations 104_1-104_N), channels (eg, 20MHz channel, 40MHz channel, 80MHz channel or 160MHz channel) ) contained in consecutive RUs are allocated to stations 104_1-104_N, respectively. By way of example and not limitation, AP 102 allocates a plurality of consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} contained in a channel (eg, a 20/40/80/160 MHz channel) to distinct users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is a station One of 104_1-104_N (N=9), each user receives only a part of a packet via consecutive RU {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} Sent from AP 102.

Consecutive RU {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} consists of consecutive subcarriers contained in the channel, where the frequency range occupied by RU_1 is lower than the frequency range occupied by RU_2, and the frequency occupied by RU_2 The range is lower than the frequency range occupied by RU_3, the frequency range occupied by RU_3 is lower than the frequency range occupied by RU_4, the frequency range occupied by RU_4 is lower than the frequency range occupied by RU_5, the frequency range occupied by RU_5 is lower than the frequency range occupied by RU_6, and the frequency range occupied by RU_6 The frequency range occupied by RU_7 is lower than the frequency range occupied by RU_7, the frequency range occupied by RU_7 is lower than the frequency range occupied by RU_8, and the frequency range occupied by RU_8 is lower than the frequency range occupied by RU_9.

In a first exemplary design, the proposed multi-user downlink OFDMA configuration method applies setting constraints to MCS allocation. For example, the AP 102 assigns one MCS to each of the stations 104_1-104_N, where the data rates of the modulation and coding schemes assigned to the stations 104_1-104_N and associated with successive RUs assigned to the stations 104_1-104_N are monotonic, i.e. , monotonically increasing or monotonically decreasing.

FIG. 2 is a schematic diagram illustrating a first MCS allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For one transmission condition, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission condition, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of the stations 104_1-104_N (N=9) may be served by one downlink packet sent via the channel, assigned to users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} and with consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8} allocated to users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} , RU_9} The data rate of the associated modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} decreases monotonically. For example, the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} are each selected from MCS0-MCS11 as defined in IEEE 802.11ax, where MCS0 has the lowest data rate and MCS11 has highest data rate.

As shown in Figure 2, among the data rates of the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9}, the data rate of MCS_1 is the largest, the data rate of MCS_9 is the smallest, and the data rate of MCS_1 is the smallest. The data rate is not lower than the data rate of MCS_2, the data rate of MCS_2 is not lower than the data rate of MCS_3, the data rate of MCS_3 is not lower than the data rate of MCS_4, the data rate of MCS_4 is not lower than the data rate of MCS_5, the data rate of MCS_5 The data rate of MCS_6 is not lower than that of MCS_6, the data rate of MCS_6 is not lower than that of MCS_7, the data rate of MCS_7 is not lower than that of MCS_8, and the data rate of MCS_8 is not lower than that of MCS_9.

In some embodiments of the present invention, the resource unit RU_1 shown in FIG. 2 may have the lowest frequency of the channel. For example, when MCS_1=MCS11, the MCS allocation scenario shown in FIG. 2 may be adopted, in which the resource unit RU_1 has the lowest frequency of the channel.

FIG. 3 is a schematic diagram illustrating a second MCS allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For a transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of the stations 104_1-104_N (N=9) may be served by one downlink packet sent over the channel, assigned to users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} and with consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} allocated to users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} } The data rate of the associated modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} increases monotonically. For example, the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} are each selected from MCS0-MCS11 as defined in IEEE 802.11ax, where MCS0 has the lowest data rate and MCS11 has most high data rate. Specifically, among the data rates of the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9}, the data rate of MCS_1 is the smallest, the data rate of MCS_9 is the largest, and the data rate of MCS_1 is not high For the data rate of MCS_2, the data rate of MCS_2 is not higher than that of MCS_3, the data rate of MCS_3 is not higher than that of MCS_4, the data rate of MCS_4 is not higher than that of MCS_5, and the data rate of MCS_5 is not higher than that of MCS_6 The data rate of MCS_6 is not higher than that of MCS_7, the data rate of MCS_7 is not higher than that of MCS_8, and the data rate of MCS_8 is not higher than that of MCS_9.

In some embodiments of the present invention, the resource unit RU_9 shown in FIG. 3 may have the highest frequency of the channel. For example, when MCS_9=MCS11, the MCS allocation scenario shown in FIG. 3 may be adopted, in which the resource unit RU_9 has the highest frequency of the channel.

For another example, the AP 102 assigns one MCS to each station 104_1-104_N, where the stations 104_1-104_N include first stations and second stations that have a common station (common station) monotonically increasing data rates of modulation and coding schemes assigned to the first station and associated with consecutive first RUs assigned to the first station, assigned to the second station and associated with the second station The data rate of the modulation and coding scheme associated with successive second RUs decreases monotonically. The data rate of the modulation and coding scheme assigned to the common station may be an extreme value (eg, a maximum or minimum value) among the modulation and coding schemes assigned to the stations 104_1-104_N.

FIG. 4 is a schematic diagram illustrating a third MCS allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For a transmission case, consecutive RU{RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy the entire bandwidth of the channel. For another transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of stations 104_1-104_N (N=9) may be served by one downlink packet sent via the channel, assigned to users {USR_1, USR_2, USR_3, USR_4, USR_5} and Data rates for modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5} associated with consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5} assigned to users {USR_1, USR_2, USR_3, USR_4, USR_5} Monotonically decreasing, assigned to users {USR_5, USR_6, USR_7, USR_8, USR_9} and associated with consecutive RUs {RU_5, RU_6, RU_7, RU_8, RU_9} assigned to users {USR_5, USR_6, USR_7, USR_8, USR_9} The data rate of the modulation and coding schemes {MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} increases monotonically. For example, the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} are each selected from MCS0-MCS11 as defined in IEEE 802.11ax, where MCS0 has the lowest data rate and MCS11 has highest data rate. Specifically, among the data rates of the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9}, the data rate of MCS_5 is the smallest, the data rate of MCS_1 is not lower than that of MCS_2, The data rate of MCS_2 is not lower than the data rate of MCS_3, the data rate of MCS_3 is not lower than that of MCS_4, the data rate of MCS_4 is not lower than that of MCS_5, the data rate of MCS_5 is not higher than that of MCS_6, the data rate of MCS_6 is not higher than that of MCS_6. The data rate is not higher than that of MCS_7, the data rate of MCS_7 is not higher than that of MCS_8, and the data rate of MCS_8 is not higher than that of MCS_9.

MCS9的資料速率，則第4圖所示的資源單元RU_9可以不具有通道的最高頻率，第4圖所示的資源單元RU_1可以不具有通道的最低頻率。例如，當MCS_5的資料速率

MCS6的 資料速率時，可以採用第4圖中所示的MCS分配場景。 In some embodiments of the invention, if the maximum data rate

The data rate of MCS9, the resource unit RU_9 shown in FIG. 4 may not have the highest frequency of the channel, and the resource unit RU_1 shown in FIG. 4 may not have the lowest frequency of the channel. For example, when the data rate of MCS_5

At the data rate of MCS6, the MCS allocation scenario shown in Figure 4 can be used.

FIG. 5 is a schematic diagram illustrating a fourth MCS allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For a transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of stations 104_1-104_N (N=9) may be served by one downlink packet sent via the channel, assigned to users {USR_1, USR_2, USR_3, USR_4, USR_5} and Data rates for modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5} associated with consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5} assigned to users {USR_1, USR_2, USR_3, USR_4, USR_5} Monotonically increasing, assigned to users {USR_5, USR_6, USR_7, USR_8, USR_9} and associated with consecutive RUs {RU_5, RU_6, RU_7, RU_8, RU_9} assigned to users {USR_5, USR_6, USR_7, USR_8, USR_9} The data rate of the modulation and coding schemes {MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} decreases monotonically. For example, the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} are each selected from MCS0-MCS11 as defined in IEEE 802.11ax, where MCS0 has the lowest data rate and MCS11 has highest data rate. Specifically, among the data rates of the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9}, the data rate of MCS_5 is the largest, the data rate of MCS_1 is not higher than that of MCS_2, The data rate of MCS_2 is not high For the data rate of MCS_3, the data rate of MCS_3 is not higher than that of MCS_4, the data rate of MCS_4 is not higher than that of MCS_5, the data rate of MCS_5 is not lower than that of MCS_6, and the data rate of MCS_6 is not lower than that of MCS_7 The data rate of MCS_7 is not lower than that of MCS_8, and the data rate of MCS_8 is not lower than that of MCS_9.

MCS9的資料率，則第5圖所示的資源單元RU_9可以不具有通道的最高頻率，第5圖所示的資源單元RU_1可以不具有通道的最低頻率。例如，當MCS_5的資料速率>MCS6的資料速率時，可以採用第5圖中所示的MCS分配場景。 In some embodiments of the present invention, if the data rate of MCS_5

The data rate of MCS9, the resource unit RU_9 shown in FIG. 5 may not have the highest frequency of the channel, and the resource unit RU_1 shown in FIG. 5 may not have the lowest frequency of the channel. For example, when the data rate of MCS_5 > the data rate of MCS6, the MCS allocation scenario shown in FIG. 5 can be adopted.

In a second exemplary design, the proposed multi-user downlink OFDMA configuration method applies setting constraints to the RU size allocation, where the RU size of a RU is the number of subcarriers (tones) included in the RU. For example, AP 102 determines the RU size of contiguous RUs allocated to stations 104_1-104_N, where the RU size of contiguous RUs is monotonic.

FIG. 6 is a schematic diagram illustrating a first RU size allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_6, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For one transmission condition, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission condition, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of the stations 104_1-104_N (N=9) may be served by one downlink packet sent over the channel. And assigned to users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} consecutive RU {RU_1, The RU sizes {S_1, S_2, S_3, S_4, S_5, S_6, S_7, S_8, S_9} of RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} decrease monotonically. Specifically, in the RU size {S_1, S_2, S_3, S_4, S_5, S_6, S_7, S_8, S_9}, the RU size S_1 of RU_1 is the largest, the RU size of RU_9 is the smallest, and the RU size S_1 of RU_1 is not smaller than the RU of RU_2 Size S_2, RU size S_2 of RU_2 is not smaller than RU size S_3 of RU_3, RU size S_3 of RU_3 is not smaller than RU size S_4 of RU_4, RU size S_4 of RU_4 is not smaller than RU size S_5 of RU_5, RU size S_5 of RU_5 is not smaller than RU_6 RU size S_6 of RU_6, RU size S_6 of RU_6 is not smaller than RU size S_7 of RU_7, RU size S_7 of RU_7 is not smaller than RU size S_8 of RU_8, RU size S_8 of RU_8 is not smaller than RU size S_9 of RU_9.

FIG. 7 is a schematic diagram illustrating a second RU size allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For a transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of the stations 104_1-104_N (N=9) may be served by one downlink packet sent over the channel and assigned to users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, RU size {S_1, S_2, S_3, S_4, S_5, S_6, S_7, S_8, S_9} for consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} for USR_7, USR_8, USR_9} Monotonically increasing. Specifically, among the RU sizes {S_1, S_2, S_3, S_4, S_5, S_6, S_7, S_8, S_9}, RU_1 has the smallest RU size S_1 and RU_9 The RU size of RU_1 is the largest, the RU size S_1 of RU_1 is not larger than the RU size S_2 of RU_2, the RU size S_2 of RU_2 is not larger than the RU size S_3 of RU_3, the RU size S_3 of RU_3 is not larger than the RU size S_4 of RU_4, and the RU size S_4 of RU_4 is not larger than the RU size S_4 of RU_4. RU size S_5 larger than RU_5, RU size S_5 of RU_5 not larger than RU size S_6 of RU_6, RU size S_6 of RU_6 not larger than RU size S_7 of RU_7, RU size S_7 of RU_7 not larger than RU size S_8 of RU_8, RU size of RU_8 S_8 is not larger than the RU size S_9 of RU_9.

For another example, the AP 102 determines the RU size allocated to the stations 104_1-104_N, where the stations 104_1-104_N include first stations and second stations that have a common station (common station), the RU size of the consecutive first RUs allocated to the first station increases monotonically, and the RU size of the consecutive second RUs allocated to the second station monotonically decreases.

FIG. 8 is a schematic diagram illustrating a third RU size allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For a transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of the stations 104_1-104_N (N=9) may be served by one downlink packet sent over the channel and assigned to a continuous sequence of users {USR_1, USR_2, USR_3, USR_4, USR_5} Monotonically decreasing RU size {S_1, S_2, S_3, S_4, S_5} of RU {RU_1, RU_2, RU_3, RU_4, RU_5}, contiguous RU {RU_5} allocated to users {USR_5, USR_6, USR_7, USR_8, USR_9}, RU_6, RU_7, RU_8, RU_9} The RU size {S_5, S_6, S_7, S_8, S_9} monotonically increases. Specifically, in the RU size {S_1, S_2, S_3, S_4, S_5, S_6, S_7, S_8, S_9}, the RU size S_5 of RU_5 is the smallest, the RU size S_1 of RU_1 is not smaller than the RU size S_2 of RU_2, and the RU of RU_2 Size S_2 is not smaller than RU size S_3 of RU_3, RU size S_3 of RU_3 is not smaller than RU size S_4 of RU_4, RU size S_4 of RU_4 is not smaller than RU size S_5 of RU_5, RU size S_5 of RU_5 is not larger than RU size S_6 of RU_6, RU_6 The RU size S_6 of RU_7 is not larger than the RU size S_7 of RU_7, the RU size S_7 of RU_7 is not larger than the RU size S_8 of RU_8, and the RU size S_8 of RU_8 is not larger than the RU size S_9 of RU_9.

FIG. 9 is a schematic diagram illustrating a fourth RU size allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For a transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of the stations 104_1-104_N (N=9) may be served by one downlink packet sent over the channel and assigned to a continuous sequence of users {USR_1, USR_2, USR_3, USR_4, USR_5} Monotonically increasing RU size {S_1, S_2, S_3, S_4, S_5} for RU {RU_1, RU_2, RU_3, RU_4, RU_5}, consecutive RU {RU_5, RU_6} allocated to users {USR_5, USR_6, USR_7, USR_8, USR_9} , RU_7, RU_8, RU_9} with monotonically decreasing RU sizes {S_5, S_6, S_7, S_8, S_9}. Specifically, in the RU size {S_1, S_2, S_3, S_4, S_5, S_6, S_7, S_8, S_9}, the RU size S_5 of RU_5 is the largest, the RU size S_1 of RU_1 is not larger than the RU size S_2 of RU_2, and the RU of RU_2 RU of size S_2 is not larger than RU_3 Small S_3, RU size S_3 of RU_3 is not larger than RU size S_4 of RU_4, RU size S_4 of RU_4 is not larger than RU size S_5 of RU_5, RU size S_5 of RU_5 is not smaller than RU size S_6 of RU_6, RU size S_6 of RU_6 is not smaller than RU_7 The RU size S_7 of RU_7 is not smaller than the RU size S_8 of RU_8, and the RU size S_8 of RU_8 is not smaller than the RU size S_9 of RU_9.

In a third exemplary design, the proposed multi-user downlink OFDMA configuration method applies setting constraints to the transmission power assignment. For example, the AP 102 determines a transmit power level for the downlink of each station 104_1-104_N, where the downlink for the stations 104_1-104_N is determined and associated with the consecutive RUs assigned to the stations 104_1-104_N The transmit power level is monotonic.

FIG. 10 is a schematic diagram illustrating a first transmission power allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For a transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of the stations 104_1-104_N (N=9) may be served by one downlink packet sent over the channel, assigned to users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7 , USR_8, USR_9} of consecutive RU {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} transmission power levels {P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8, P_9} monotonically decrease. Specifically, in the transmit power levels {P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8, P_9}, The transmit power level P_1 of RU_1 is the largest, and the transmit power level P_9 of RU_9 is the smallest. The transmit power level P_1 of RU_1 is not lower than the transmit power level P_2 of RU_2, the transmit power level P_2 of RU_2 is not lower than the transmit power level P_3 of RU_3, and the transmit power level P_3 of RU_3 is not lower than the transmit power level of RU_4 Level P_4, the transmit power level P_4 of RU_4 is not lower than the transmit power level P_5 of RU_5, the transmit power level P_5 of RU_5 is not lower than the transmit power level P_6 of RU_6, and the transmit power level P_6 of RU_6 is not lower than The transmit power level P_7 of RU_7, the transmit power level P_7 of RU_7 is not lower than the transmit power level P_8 of RU_8, and the transmit power level P_8 of RU_8 is not lower than the transmit power level P_9 of RU_9.

In some embodiments of the present invention, the resource unit RU_9 shown in FIG. 10 may have the highest frequency of the channel. For example, when the modulation and coding scheme allocated to the resource unit RU_9 is MCS11, the transmission power allocation scenario shown in FIG. 10 is adopted, where the resource unit RU_9 has the highest frequency of the channel.

FIG. 11 is a schematic diagram illustrating a second transmission power allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For a transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of the stations 104_1-104_N (N=9) may be served by one downlink packet sent over the channel, assigned to users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7 , USR_8, USR_9} of consecutive RU {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} transmission power levels {P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8, P_9} monotonically increase. Tool Generally, among the transmit power levels {P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8, P_9}, the transmit power level P_1 of RU_1 is the smallest, and the transmit power level P_9 of RU_9 is the largest. The transmit power level P_1 of RU_1 is not higher than the transmit power level P_2 of RU_2, the transmit power level P_2 of RU_2 is not higher than the transmit power level P_3 of RU_3, and the transmit power level P_3 of RU_3 is not higher than the transmit power level of RU_4 Level P_4, the transmit power level P_4 of RU_4 is not higher than the transmit power level P_5 of RU_5, the transmit power level P_5 of RU_5 is not higher than the transmit power level P_6 of RU_6, and the transmit power level P_6 of RU_6 is not higher than The transmit power level P_7 of RU_7, the transmit power level P_7 of RU_7 is not higher than the transmit power level P_8 of RU_8, and the transmit power level P_8 of RU_8 is not higher than the transmit power level P_9 of RU_9.

In some embodiments of the present invention, the resource unit RU_1 shown in FIG. 11 may have the lowest frequency of the channel. For example, when the modulation and coding scheme allocated to the resource unit RU_1 is MCS11, the transmission power allocation scenario shown in FIG. 11 is adopted, where the resource unit RU_1 has the lowest frequency of the channel.

For another example, the AP 102 determines a transmit power level for the downlink of each station 104_1-104_N, where the stations 104_1-104_N include a first station and a second station, the first station and the second station have a common station, The transmit power levels of consecutive first RUs allocated to the first station increase monotonically, and the transmit power levels determined by consecutive second RUs allocated to the second station decrease monotonically.

FIG. 12 is a schematic diagram illustrating a third transmission power allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each distinct user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For a transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of the stations 104_1-104_N (N=9) may be served by one downlink packet sent over the channel, assigned to consecutive RUs of users {USR_1, USR_2, USR_3, USR_4, USR_5} The transmission power levels {P_1, P_2, P_3, P_4, P_5} of {RU_1, RU_2, RU_3, RU_4, RU_5} decrease monotonically and are allocated to users {USR_5, USR_6, USR_7, USR_8, USR_9} The transmission power levels {P_5, P_6, P_7, P_8, P_9} of consecutive RUs {RU_5, RU_6, RU_7, RU_8, RU_9} monotonically increase. Specifically, among the transmit power levels {P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8, P_9}, the transmit power level P_5 of RU_5 is the smallest, and the transmit power level P_1 of RU_1 is not lower than that of RU_2. The transmission power level P_2, the transmission power level P_2 of RU_2 is not lower than the transmission power level P_3 of RU_3, the transmission power level P_3 of RU_3 is not lower than the transmission power level P_4 of RU_4, and the transmission power level P_4 of RU_4 is not lower than the transmission power level P_4 of RU_4. The transmit power level P_5 of RU_5 is lower than the transmit power level P_5 of RU_5, the transmit power level P_5 of RU_5 is not higher than the transmit power level P_6 of RU_6, the transmit power level P_6 of RU_6 is not higher than the transmit power level P_7 of RU_7, and the transmit power level of RU_7 The level P_7 is not higher than the transmit power level P_8 of RU_8, and the transmit power level P_8 of RU_8 is not higher than the transmit power level P_9 of RU_9.

In some embodiments of the invention, if the maximum data rate is not higher than the data rate of MCS9, the resource unit RU_9 shown in Figure 12 may not have the highest frequency of the channel, and the resource unit RU_1 shown in Figure 12 may Does not have the lowest frequency of the channel. For example, when the data rate of the modulation and coding scheme allocated to RU_5 is higher than that of MCS6, the transmit power allocation scenario shown in FIG. 12 is adopted.

FIG. 13 is a schematic diagram illustrating a fourth transmission power allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} included in the channel to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, where each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of the stations 104_1-104_N (N=9). For a transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy the entire bandwidth of the channel. For another transmission case, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} may occupy part of the channel bandwidth.

In this embodiment, all of the stations 104_1-104_N (N=9) may be served by one downlink packet sent over the channel, assigned to consecutive RUs of users {USR_1, USR_2, USR_3, USR_4, USR_5} The transmission power levels {P_1, P_2, P_3, P_4, P_5} of {RU_1, RU_2, RU_3, RU_4, RU_5} monotonically increase, allocated to users {USR_5, USR_6, USR_7, USR_8, USR_9} The transmission power levels {P_5, P_6, P_7, P_8, P_9} of consecutive RUs {RU_5, RU_6, RU_7, RU_8, RU_9} decrease monotonically. Specifically, among the transmit power levels {P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8, P_9}, the transmit power level P_5 of RU_5 is the largest, and the transmit power level P_1 of RU_1 is not higher than that of RU_2. The transmit power level P_2, the transmit power level P_2 of RU_2 is not higher than the transmit power level P_3 of RU_3, the transmit power level P_3 of RU_3 is not higher than the transmit power level P_4 of RU_4, and the transmit power level P_4 of RU_4 is not higher than that of RU_4. Higher than the transmit power level P_5 of RU_5, the transmit power level P_5 of RU_5 is not lower than the transmit power level P_6 of RU_6, the transmit power level P_6 of RU_6 is not lower than the transmit power level P_7 of RU_7, the transmit power of RU_7 The level P_7 is not lower than the transmit power level P_8 of RU_8, and the transmit power level P_8 of RU_8 is not lower than the transmit power level P_9 of RU_9.

In some embodiments of the invention, if the maximum data rate is not higher than the data rate of MCS9, the resource unit RU_9 shown in Figure 13 may not have the highest frequency of the channel, and the resource unit RU_1 shown in Figure 13 may Does not have the lowest frequency of the channel. For example, when the data rate of the modulation and coding scheme allocated to RU_5 is not higher than that of MCS6, the transmit power allocation scenario shown in FIG. 13 is adopted.

In the above-described embodiments shown in Figures 2 to 5, the proposed multi-user downlink The OFDMA configuration method applies setting constraints to the MCS allocation. In the above embodiments shown in Figures 6 to 9, the proposed multi-user downlink OFDMA configuration method applies setting constraints to RU size allocation. In the above embodiments shown in Figures 10 to 13, the proposed multi-user downlink OFDMA configuration method applies setting constraints to transmit power allocation. However, these are for illustrative purposes only, and are not meant to limit the present invention. Indeed, the proposed multi-user downlink OFDMA configuration method can apply setting constraints to any combination of RU size allocation, MCS allocation and transmit power allocation.

Figures 14 to 17 are schematic diagrams illustrating different multi-user downlink OFDMA configurations applying setting constraints to RU size allocation, MCS allocation and transmit power allocation according to embodiments of the present invention. Since the details of the embodiments shown in FIGS. 14 to 17 can be readily understood after reading the above paragraphs, further descriptions are omitted here for the sake of brevity due to the knowledge in the art. Furthermore, the multi-user downlink OFDMA configurations shown in Figures 14 to 17 are for illustration purposes only and are not meant to limit the present invention. Any multi-user downlink OFDMA configuration using the proposed set constraints of RU size allocation, MCS allocation and transmit power allocation is within the scope of the present invention.

For example, the data rate of the modulation and coding scheme assigned to stations (which are served by one packet sent over a channel) and associated with successive RUs assigned to stations is monotonic, The transmit power level of consecutive RUs that are served by one packet sent over the channel) is monotonic, and the RU size of consecutive RUs allocated to stations that are served by one packet sent over the channel is monotonic.

For another example, the modulation and coding scheme assigned to the first station (the first station being some of the stations served by one packet sent over the channel) and associated with consecutive RUs assigned to the first station The data rate increases monotonically and the modulation and coding scheme assigned to the second station (the second station is some of the stations served by one packet sent over the channel) and associated with consecutive RUs assigned to the second station A monotonically decreasing data rate of , where the first and second stations have a common station; consecutive RUs allocated to the third station (the third station is some of the stations served by one packet sent over the channel) The transmit power level of the monotonically increases, the transmit power level of successive RUs allocated to the fourth station (the fourth station is some of the stations served by one packet sent over the channel) monotonically decreases, where the third station and the fourth station have a common station; the RU size of consecutive RUs allocated to the fifth station (the fifth station is some of the stations served by one packet sent over the channel) monotonically increases, the allocation to the sixth station (th Six stations are some of the stations served by one packet sent over the channel) with a monotonically decreasing RU size of consecutive RUs, where the fifth and sixth stations have a common station. The grouping of the first and second stations may be the same or different from the grouping of the third and fourth stations, depending on practical design considerations. The grouping of the first and second stations may be the same or different from the grouping of the fifth and sixth stations, depending on practical design considerations. The grouping of the third and fourth stations may or may not be the same as the grouping of the fifth and sixth stations, depending on practical design considerations.

It will be readily appreciated by those skilled in the art that various modifications and variations can be made in the apparatus and method while maintaining the teachings of the present invention. Accordingly, the above disclosure should be construed as being limited only by the limits of the scope of the appended claims.

100: Wireless Communication System

102: Access Point

104_1, 104_2, ..., 104_N: Station

Claims (20)

A multi-user downlink orthogonal frequency division multiple access (OFDMA) configuration method, comprising: allocating consecutive resource units (RUs) included in a channel to a plurality of stations, respectively; stations are allocated a modulation and coding scheme, wherein the data rates of the modulation and coding schemes allocated to the plurality of first stations and associated with consecutive first RUs allocated to the plurality of first stations are monotonic, wherein the plurality of first stations are included in the plurality of stations. The multi-user downlink OFDMA configuration method of claim 1, wherein the plurality of first stations are all stations among the plurality of stations that use the channel to perform downlink transmission of one packet. The multi-user downlink OFDMA configuration method of claim 2, further comprising: determining a transmit power level for the downlink of each of the plurality of stations; The transmit power level determined by successive RUs of a station is monotonic. The multi-user downlink OFDMA configuration method of claim 2, further comprising: determining RU sizes of the consecutive RUs allocated to the multiple stations, wherein the RU sizes of the consecutive RUs are monotonic. The multi-user downlink OFDMA configuration method of claim 2, wherein the consecutive RUs include RUs with the lowest frequency of the channel. The multi-user downlink OFDMA configuration method of claim 2, wherein the consecutive RUs include RUs with the highest frequency of the channel. The multi-user downlink OFDMA configuration method of claim 1, wherein the plurality of stations includes a plurality of second stations, the plurality of first stations and the plurality of second stations have a common station, which is allocated to the plurality of second stations. The data rates of the modulation and coding schemes of the plurality of first stations and associated with consecutive first RUs allocated to the first station are monotonically increasing, the data rates allocated to the plurality of second stations and associated with the said multiple The data rates of the modulation and coding schemes associated with successive second RUs of the two stations decrease monotonically. The multi-user downlink OFDMA configuration method of claim 7, further comprising: determining a transmit power level for the downlink of each of the multiple stations; wherein the multiple stations include a Three stations and a fourth station, the third station and the fourth station have a common station, the transmit power levels of consecutive RUs allocated to the third station monotonically increase, and the consecutive RUs allocated to the fourth station The transmit power level of the RU decreases monotonically. The multi-user downlink OFDMA configuration method of claim 7, further comprising: determining the RU size of the consecutive RUs allocated to the plurality of stations, wherein the plurality of stations includes a third station and a fourth station , the third station and the fourth station have a common station, the RU size of consecutive RUs allocated to the third station increases monotonically, and the RU size of consecutive RUs allocated to the fourth station monotonically decreases. The multi-user downlink OFDMA configuration method of claim 7, wherein the frequency occupied by the consecutive second RUs is not higher than the frequency occupied by the consecutive first RUs, and is allocated to the multiple Among the modulation and coding schemes of the stations, the data rate allocated to the modulation and coding scheme of the common station is the smallest. The multi-user downlink OFDMA configuration method of claim 7, wherein the frequency occupied by the consecutive first RUs is not higher than the frequency occupied by the consecutive second RUs, and the frequency occupied by the consecutive second RUs is Among the modulation and coding schemes, the modulation and coding scheme allocated to the public station has the largest data rate. A multi-user downlink OFDMA configuration method, comprising: allocating consecutive RUs included in a channel to a plurality of stations respectively; and determining a RU size of the consecutive RUs, wherein the consecutive first RUs allocated to a plurality of first stations The RU size of is monotonic, wherein the plurality of first stations are included in the plurality of stations. The multi-user downlink OFDMA configuration method of claim 12, wherein the plurality of first stations are all of the plurality of stations that use the channel to perform downlink transmission of one packet stand. The multi-user downlink OFDMA configuration method of claim 13, further comprising: determining a transmit power level for the downlink of each of the plurality of stations; The transmit power level determined by the successive RUs of a station is monotonic. The multi-user downlink OFDMA configuration method of claim 13, wherein the consecutive RUs include RUs with the lowest frequency of the channel. The multi-user downlink OFDMA configuration method of claim 13, wherein the consecutive RUs include RUs with the highest frequency of the channel. The multi-user downlink OFDMA configuration method of claim 12, wherein the plurality of stations includes a plurality of second stations, the plurality of first stations and the plurality of second stations have a common station, and are allocated to all the stations. The RU sizes of consecutive first RUs of the plurality of first stations monotonically increase, and the RU sizes of consecutive second RUs allocated to the plurality of second stations are monotonically decreased. The multi-user downlink OFDMA configuration method of claim 17, further comprising: determining a transmit power level for the downlink of each of the plurality of stations; wherein the plurality of stations include a Three stations and a fourth station, the third station and the fourth station having a common station, the transmit power level determined for consecutive RUs allocated to the third station increases monotonically, for the The transmit power level determined by successive RUs of a station decreases monotonically. The multi-user downlink OFDMA configuration method of claim 17, wherein the frequency occupied by the consecutive second RUs is not higher than the frequency occupied by the consecutive first RUs, and the frequency occupied by the consecutive first RUs is Among the RU sizes of consecutive RUs, the RUs allocated to the public station have the smallest RU size. The multi-user downlink OFDMA configuration method of claim 17, wherein the frequency occupied by the consecutive first RUs is not higher than the frequency occupied by the consecutive second RUs, and the frequency occupied by the consecutive second RUs is not higher than the frequency occupied by the consecutive second RUs. Among the RU sizes of consecutive RUs, the RUs allocated to the public station have the largest RU size.

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