Orthogonal Frequency Division Multiple Access Configuration Method for Multi-User Downlink

Abstract

The present invention provides a multi-user downlink OFDMA configuration method. The method comprises: respectively allocating continuous resource units (RUs) included in a channel to a plurality of stations; and allocating a modulation and coding scheme (MCS) to each of the plurality of stations, wherein the data rate of the modulation and coding scheme allocated to a first station and associated with a continuous first RU allocated to the first station is monotonic, wherein the first station is included in the plurality of stations. The present invention enables the modulation and coding scheme, transmission power level and / or resource unit size to be correctly allocated, optimizes the throughput of the downlink, and improves the transmission performance.

Description

Technical Field

[0001] The present invention relates to wireless communication, and more particularly to a multi-user downlink orthogonal frequency-division multiple access (OFDMA) configuration method. Background Art

[0002] With the rapid growth of Wi-Fi usage in enterprises and public places, WiFi technology needs to evolve further to meet new requirements. The limited amount of unlicensed spectrum in the 2.4GHz and 5GHz bands 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 technology that enables an AP to communicate with multiple stations / users simultaneously in an efficient WLAN. In order to maximize the downlink throughput between the AP and the stations / users, the AP should correctly set the OFDMA configuration to mitigate the impact on the downlink throughput. For example, downlink throughput degradation may be due to transmit (TX) impairments (e.g., intermodulation, image rejection ratio, harmonic distortion, and spurious) and / or receive (RX) impairments (e.g., thermal noise, intermodulation, image rejection ratio, phase noise, and spurious). Therefore, an innovative multi-user downlink OFDMA configuration method is needed so that modulation and coding schemes, transmission power levels, and / or resource unit sizes can be correctly allocated to optimize downlink throughput. Summary of the invention

[0003] In view of this, the present invention needs to provide a novel multi-user downlink OFDMA configuration method.

[0004] 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 multiple stations respectively; and allocating a modulation and coding scheme (MCS) to each of the multiple stations through an access point (AP), wherein the data rate of the modulation and coding scheme assigned to a first station and associated with the consecutive first RUs assigned to the first station is monotonic, wherein the first station is included in the multiple stations.

[0005] 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 multiple stations respectively; and determining the RU size of the consecutive RUs by an AP, wherein the RU size of the consecutive first RUs allocated to a first station is monotonic, wherein the first station is included in the multiple stations.

[0006] The multi-user downlink OFDMA configuration method of the present invention enables the modulation and coding scheme, transmission power level and / or resource unit size to be correctly allocated, optimizes the downlink throughput and improves the transmission performance.

[0007] These and other objects of the present invention will no doubt become apparent to those of ordinary skill in the art after reading the following detailed description of the preferred embodiments illustrated in conjunction with the various drawing figures. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention is illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like reference numerals indicate like elements. When a particular feature, structure or characteristic is described in conjunction with an embodiment, it should be understood that it is within the knowledge of those skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments, whether or not expressly indicated.

[0009] Figure 1 is a schematic diagram showing a wireless communication system according to an embodiment of the present invention.

[0010] Figure 2 is a schematic diagram illustrating a first MCS allocation scenario according to an embodiment of the present invention.

[0011] Figure 3 is a schematic diagram illustrating a second MCS allocation scenario according to an embodiment of the present invention.

[0012] Figure 4 is a schematic diagram illustrating a third MCS allocation scenario according to an embodiment of the present invention.

[0013] Figure 5 is a schematic diagram illustrating a fourth MCS allocation scenario according to an embodiment of the present invention.

[0014] Figure 6 is a schematic diagram illustrating a first RU size allocation scenario according to an embodiment of the present invention.

[0015] Figure 7 is a schematic diagram illustrating a second RU size allocation scenario according to an embodiment of the present invention.

[0016] Figure 8 is a schematic diagram illustrating a third RU size allocation scenario according to an embodiment of the present invention.

[0017] Fig. 9 is a schematic diagram illustrating a fourth RU size allocation scenario according to an embodiment of the present invention.

[0018] Fig.10 is a schematic diagram showing a first transmission power allocation scenario according to an embodiment of the present invention.

[0019] Fig.11 is a schematic diagram showing a second transmission power allocation scenario according to an embodiment of the present invention.

[0020] Fig.12 is a schematic diagram showing a third transmission power allocation scenario according to an embodiment of the present invention.

[0021] Fig.13 is a schematic diagram showing a fourth transmission power allocation scenario according to an embodiment of the present invention.

[0022] Figures 14 to 17 is a schematic diagram showing different multi-user downlink OFDMA configurations applying setting constraints to RU size allocation, MCS allocation, and transmit power allocation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] Certain words are used in the specification and claims to refer to specific components. It should be understood by those skilled in the art that electronic equipment manufacturers may use different terms to refer to the same component. The specification and claims do not distinguish components by differences in name, but by differences in the functions of the components. The term "including" mentioned throughout the specification and subsequent claims is an open-ended term and should be interpreted as "including but not limited to". In addition, the term "coupled" is used herein to include any direct and indirect electrical connection means. Therefore, if the text describes a first device as being electrically connected to a 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 connection means.

[0024] Figure 1 1 is a schematic diagram showing a wireless communication system according to an embodiment of the present invention. The wireless communication system 100 may be a Wi-Fi system that uses OFDMA for multi-user downlink communication. For example, the wireless communication system 100 may comply with IEEE802.11ax. Figure 1 As shown, the wireless communication system 100 includes an access point (AP) 102 and a plurality of stations (STA) 104_1, 104_2, ..., 104_N. The number of stations N involved in the 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 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 a resource unit (RU) configuration, a modulation and coding scheme (MCS) setting, a transmit power level setting, or a combination thereof, wherein the RU configuration may include an RU size and / or an RU position. The proposed multi-user downlink OFDMA configuration method may apply setting constraints to at least one of RU size allocation, MCS allocation, and transmit power level allocation. For example, setting constraints may include a monotonic function for setting downlink parameters (eg, RU size, MCS, or transmit power) or a symmetric function for setting downlink parameters (eg, RU size, MCS, or transmit power).

[0025] According to IEEE 802.11ax, a 20 / 40 / 80 / 160MHz channel is divided into multiple resource units (RUs) through OFDMA, and a packet can be used by multiple users. Each RU allocated in the 20 / 40 / 80 / 160MHz channel can be further divided into subcarriers, also known as "tones", and the width of each subcarrier is 78.125KHz. Taking a 20MHz channel as an example, a RU can contain 26, 52, 106, or 242 tones, where a 26-tone RU corresponds to an RU size of approximately 2MHz, a 52-tone RU corresponds to an RU size of approximately 4MHz, a 106-tone RU corresponds to an RU size of approximately 8MHz, and a 242-tone RU corresponds to an RU size of approximately 20MHz.

[0026] According to the proposed multi-user downlink OFDMA configuration method, a data packet can be used by multiple users (e.g., stations 104_1-104_N) through OFDMA, and consecutive RUs contained in a channel (e.g., a 20MHz channel, a 40MHz channel, an 80MHz channel, or a 160MHz channel) are respectively allocated to stations 104_1-104_N. As an example and not a limitation, AP 102 allocates multiple consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} contained in a channel (e.g., a 20 / 40 / 80 / 160MHz channel) to different users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9}, wherein 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), and each user receives only a part of a data packet, which is sent from AP102 via consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9}.

[0027] The continuous RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} are composed of continuous subcarriers contained in the channel, where the frequency range occupied by RU_1 is lower than the frequency range occupied by RU_2, the frequency range occupied by RU_2 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, the frequency range occupied by RU_6 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.

[0028] In a first exemplary design, the proposed multi-user downlink OFDMA configuration method applies setting constraints to MCS assignments. For example, AP 102 assigns an MCS to each of stations 104_1-104_N, where the data rate of the modulation and coding scheme assigned to stations 104_1-104_N and associated with consecutive RUs assigned to stations 104_1-104_N is monotonic, i.e., monotonically increasing or monotonically decreasing.

[0029] Figure 21 is a schematic diagram showing a first MCS allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission condition, continuous RUs {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 condition, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0030] In this embodiment, all stations among stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, and the data rate of the modulation and coding scheme {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, USR_7, USR_8, USR_9} allocated to users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} and associated 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} decreases monotonically. For example, each of the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} is selected from MCS0-MCS11 defined in IEEE 802.11ax, where MCS0 has the lowest data rate and MCS11 has the highest data rate.

[0031] like Figure 2As shown, 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, the data rate of MCS_1 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 is not lower than the data rate of MCS_6, the data rate of MCS_6 is not lower than the data rate of MCS_7, the data rate of MCS_7 is not lower than the data rate of MCS_8, and the data rate of MCS_8 is not lower than the data rate of MCS_9.

[0032] In some embodiments of the present invention, Figure 2 The resource unit RU_1 shown may have the lowest frequency of the channel. For example, when MCS_1 = MCS11, Figure 2 The MCS allocation scenario is shown, where resource unit RU_1 has the lowest frequency of the channel.

[0033] Figure 3 1 is a schematic diagram showing a second MCS allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission situation, continuous RUs {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 situation, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0034] In this embodiment, all stations among stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, and the data rate of the modulation and coding scheme {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, USR_7, USR_8, USR_9} allocated to users {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} and associated 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} increases monotonically. For example, each of the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} is selected from MCS0-MCS11 defined in IEEE802.11ax, where MCS0 has the lowest data rate and MCS11 has the 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_1 is the smallest, the data rate of MCS_9 is the largest, the data rate of MCS_1 is not higher than the data rate of MCS_2, the data rate of MCS_2 is not higher than the data rate of MCS_3, the data rate of MCS_3 is not higher than the data rate of MCS_4, the data rate of MCS_4 is not higher than the data rate of MCS_5, the data rate of MCS_5 is not higher than the data rate of MCS_6, the data rate of MCS_6 is not higher than the data rate of MCS_7, the data rate of MCS_7 is not higher than the data rate of MCS_8, and the data rate of MCS_8 is not higher than the data rate of MCS_9.

[0035] In some embodiments of the present invention, Figure 3 The resource unit RU_9 shown may have the highest frequency of the channel. For example, when MCS_9 = MCS11, Figure 3 MCS allocation scenario shown, where resource unit RU_9 has the highest frequency of the channel.

[0036] For another example, the AP 102 assigns an MCS to each station 104_1-104_N, wherein 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 data rate of the modulation and coding scheme assigned to the first station and associated with the consecutive first RUs assigned to the first station increases monotonically, and the data rate of the modulation and coding scheme assigned to the second station and associated with the consecutive second RUs assigned to the second station decreases monotonically. The data rate of the modulation and coding scheme assigned to the common station may be an extreme value (e.g., a maximum value or a minimum value) among the modulation and coding schemes assigned to the stations 104_1-104_N.

[0037] Figure 4 1 is a schematic diagram showing a third MCS allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission situation, continuous RUs {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 situation, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0038] In this embodiment, all of the stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5} assigned to the users {USR_1, USR_2, USR_3, USR_4, USR_5} and associated with the consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5} assigned to the users {USR_1, USR_2, USR_3, USR_4, USR_5}. The data rate of the modulation and coding schemes {MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} allocated to the user {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} allocated to the user {USR_5, USR_6, USR_7, USR_8, USR_9} is monotonically increasing. For example, each of the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} is selected from MCS0-MCS11 defined in IEEE 802.11ax, where MCS0 has the lowest data rate and MCS11 has the 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 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 is not higher than the data rate of MCS_6, the data rate of MCS_6 is not higher than the data rate of MCS_7, the data rate of MCS_7 is not higher than the data rate of MCS_8, and the data rate of MCS_8 is not higher than the data rate of MCS_9.

[0039] In some embodiments of the present invention, if the maximum data rate is ≤ the data rate of MCS9, then Figure 4 The resource unit RU_9 shown may not have the highest frequency of the channel. Figure 4 The resource unit RU_1 shown may not have the lowest frequency of the channel. For example, when the data rate of MCS_5 is ≤ the data rate of MCS6, Figure 4 The MCS allocation scenario shown in .

[0040] Figure 5 1 is a schematic diagram showing a fourth MCS allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission situation, continuous RUs {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 situation, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0041] In this embodiment, all of the stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5} assigned to the users {USR_1, USR_2, USR_3, USR_4, USR_5} and associated with the consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5} assigned to the users {USR_1, USR_2, USR_3, USR_4, USR_5}. The data rate of the modulation and coding schemes {MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} allocated to the user {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} allocated to the user {USR_5, USR_6, USR_7, USR_8, USR_9} is monotonically increasing. For example, each of the modulation and coding schemes {MCS_1, MCS_2, MCS_3, MCS_4, MCS_5, MCS_6, MCS_7, MCS_8, MCS_9} is selected from MCS0-MCS11 defined in IEEE 802.11ax, where MCS0 has the lowest data rate and MCS11 has the 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 the data rate of MCS_2, the data rate of MCS_2 is not higher than the data rate of MCS_3, the data rate of MCS_3 is not higher than the data rate of MCS_4, the data rate of MCS_4 is not higher than the data rate of MCS_5, the data rate of MCS_5 is not lower than the data rate of MCS_6, the data rate of MCS_6 is not lower than the data rate of MCS_7, the data rate of MCS_7 is not lower than the data rate of MCS_8, and the data rate of MCS_8 is not lower than the data rate of MCS_9.

[0042] In some embodiments of the present invention, if the data rate of MCS_5 ≤ the data rate of MCS9, then Figure 5 The resource unit RU_9 shown may not have the highest frequency of the channel. Figure 5 The resource unit RU_1 shown may not have the lowest frequency of the channel. For example, when the data rate of MCS_5> the data rate of MCS6, Figure 5 The MCS allocation scenario shown in .

[0043] In a second exemplary design, the proposed multi-user downlink OFDMA configuration method applies setting constraints to 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 RU sizes of consecutive RUs allocated to stations 104_1-104_N, where the RU sizes of the consecutive RUs are monotonic.

[0044] Figure 6 1 is a schematic diagram showing a first RU size allocation scenario according to an embodiment of the present invention. As described above, AP102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission condition, continuous RUs {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 condition, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0045] In this embodiment, all stations among stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, and the RU sizes {S_1, S_2, S_3, S_4, S_5, S_6, S_7, S_8, S_9} of 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} decrease monotonically. Specifically, among the RU sizes {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 S_1 of RU_9 is the smallest, the RU size S_1 of RU_1 is not less than the RU size S_2 of RU_2, the RU size S_2 of RU_2 is not less than the RU size S_3 of RU_3, the RU size S_3 of RU_3 is not less than the RU size S_4 of RU_4, the RU size S_4 of RU_4 is not less than the RU size S_5 of RU_5, the RU size S_5 of RU_5 is not less than the RU size S_6 of RU_6, the RU size S_6 of RU_6 is not less than the RU size S_7 of RU_7, the RU size S_7 of RU_7 is not less than the RU size S_8 of RU_8, and the RU size S_8 of RU_8 is not less than the RU size S_9 of RU_9.

[0046] Figure 7 1 is a schematic diagram showing a second RU size allocation scenario according to an embodiment of the present invention. As described above, AP102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission situation, continuous RUs {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 situation, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0047] In this embodiment, all stations among stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, and the RU sizes {S_1, S_2, S_3, S_4, S_5, S_6, S_7, S_8, S_9} of 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} increase monotonically. Specifically, among the RU sizes {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 smallest, the RU size S_1 of RU_9 is the largest, the RU size S_1 of RU_1 is not greater than the RU size S_2 of RU_2, the RU size S_2 of RU_2 is not greater than the RU size S_3 of RU_3, the RU size S_3 of RU_3 is not greater than the RU size S_4 of RU_4, the RU size S_4 of RU_4 is not greater than the RU size S_5 of RU_5, the RU size S_5 of RU_5 is not greater than the RU size S_6 of RU_6, the RU size S_6 of RU_6 is not greater than the RU size S_7 of RU_7, the RU size S_7 of RU_7 is not greater than the RU size S_8 of RU_8, and the RU size S_8 of RU_8 is not greater than the RU size S_9 of RU_9.

[0048] For another example, the AP 102 determines the RU size allocated to the stations 104_1-104_N, wherein 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 RU size of consecutive first RUs allocated to the first station increases monotonically, and the RU size of consecutive second RUs allocated to the second station decreases monotonically.

[0049] Figure 81 is a schematic diagram showing a third RU size allocation scenario according to an embodiment of the present invention. As described above, AP102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission situation, continuous RUs {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 situation, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0050] In this embodiment, all stations among stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, and the RU sizes {S_1, S_2, S_3, S_4, S_5} of consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5} allocated to users {USR_1, USR_2, USR_3, USR_4, USR_5} decrease monotonically, and the RU sizes {S_5, S_6, S_7, S_8, S_9} of consecutive RUs {RU_5, RU_6, RU_7, RU_8, RU_9} allocated to users {USR_5, USR_6, USR_7, USR_8, USR_9} increase monotonically. Specifically, among the RU sizes {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 less than the RU size S_2 of RU_2, the RU size S_2 of RU_2 is not less than the RU size S_3 of RU_3, the RU size S_3 of RU_3 is not less than the RU size S_4 of RU_4, the RU size S_4 of RU_4 is not less than the RU size S_5 of RU_5, the RU size S_5 of RU_5 is not greater than the RU size S_6 of RU_6, the RU size S_6 of RU_6 is not greater than the RU size S_7 of RU_7, the RU size S_7 of RU_7 is not greater than the RU size S_8 of RU_8, and the RU size S_8 of RU_8 is not greater than the RU size S_9 of RU_9.

[0051] Fig. 91 is a schematic diagram showing a fourth RU size allocation scenario according to an embodiment of the present invention. As described above, AP102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission situation, continuous RUs {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 situation, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0052] In this embodiment, all stations among stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, and the RU sizes {S_1, S_2, S_3, S_4, S_5} of consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5} allocated to users {USR_1, USR_2, USR_3, USR_4, USR_5} increase monotonically, and the RU sizes {S_5, S_6, S_7, S_8, S_9} of consecutive RUs {RU_5, RU_6, RU_7, RU_8, RU_9} allocated to users {USR_5, USR_6, USR_7, USR_8, USR_9} decrease monotonically. Specifically, among the RU sizes {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 greater than the RU size S_2 of RU_2, the RU size S_2 of RU_2 is not greater than the RU size S_3 of RU_3, the RU size S_3 of RU_3 is not greater than the RU size S_4 of RU_4, the RU size S_4 of RU_4 is not greater than the RU size S_5 of RU_5, the RU size S_5 of RU_5 is not less than the RU size S_6 of RU_6, the RU size S_6 of RU_6 is not less than the RU size S_7 of RU_7, the RU size S_7 of RU_7 is not less than the RU size S_8 of RU_8, and the RU size S_8 of RU_8 is not less than the RU size S_9 of RU_9.

[0053] In a third exemplary design, the proposed multi-user downlink OFDMA configuration method applies setting constraints to the transmission power assignment. For example, AP 102 determines a transmit power level for the downlink of each station 104_1-104_N, wherein the transmit power levels determined for the downlink of stations 104_1-104_N and associated with consecutive RUs assigned to stations 104_1-104_N are monotonic.

[0054] Fig.10 1 is a schematic diagram showing a first transmission power allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission situation, continuous RUs {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 situation, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0055] In this embodiment, all stations in stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, and the transmission power levels {P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8, P_9} of 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} are monotonically reduced. Specifically, among the transmission power levels {P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8, P_9}, the transmission power level P_1 of RU_1 is the largest, and the transmission 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, the transmit power level P_3 of RU_3 is not lower than the transmit power level P_4 of RU_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, 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.

[0056] In some embodiments of the present invention, Fig.10 The resource unit RU_9 shown may have the highest frequency of the channel. For example, when the modulation and coding scheme assigned to the resource unit RU_9 is MCS11, Fig.10 The transmit power allocation scenario shown, where resource unit RU_9 has the highest frequency of the channel.

[0057] Fig.111 is a schematic diagram showing a second transmission power allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission situation, continuous RUs {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 situation, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0058] In this embodiment, all of the stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, and the transmission power levels {P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8, P_9} of 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} are monotonically increased. Specifically, among the transmission power levels {P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8, P_9}, the transmission power level P_1 of RU_1 is the smallest, and the transmission 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, the transmit power level P_3 of RU_3 is not higher than the transmit power level P_4 of RU_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, 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.

[0059] In some embodiments of the present invention, Fig.11 The resource unit RU_1 shown may have the lowest frequency of the channel. For example, when the modulation and coding scheme assigned to the resource unit RU_1 is MCS11, Fig.11 The transmit power allocation scenario is shown, where resource unit RU_1 has the lowest frequency of the channel.

[0060] For another example, the AP 102 determines a transmit power level for a downlink of each station 104_1-104_N, wherein 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.

[0061] Fig.12 1 is a schematic diagram showing a third transmission power allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission situation, continuous RUs {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 situation, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0062] In this embodiment, all stations among stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, and the transmission power levels (transmission power level) {P_1, P_2, P_3, P_4, P_5} of consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5} allocated to users {USR_1, USR_2, USR_3, USR_4, USR_5} decrease monotonically, and the transmission power levels (transmission power level) {P_5, P_6, P_7, P_8, P_9} of consecutive RUs {RU_5, RU_6, RU_7, RU_8, RU_9} allocated to users {USR_5, USR_6, USR_7, USR_8, USR_9} increase 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 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, the transmit power level P_3 of RU_3 is not lower than the transmit power level P_4 of RU_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 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, 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.

[0063] In some embodiments of the present invention, if the maximum data rate is not higher than the data rate of MCS9, Fig.12 The resource unit RU_9 shown may not have the highest frequency of the channel, and Fig.12 The resource unit RU_1 shown in FIG may not have the lowest frequency of the channel. For example, when the data rate of the modulation and coding scheme assigned to RU_5 is higher than the data rate of MCS6, Fig.12 The transmit power allocation scenario shown.

[0064] Fig.131 is a schematic diagram showing a fourth transmission power allocation scenario according to an embodiment of the present invention. As described above, AP 102 allocates continuous 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}, wherein each different user {USR_1, USR_2, USR_3, USR_4, USR_5, USR_6, USR_7, USR_8, USR_9} is one of stations 104_1-104_N (N=9). For a transmission situation, continuous RUs {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 situation, consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5, RU_6, RU_7, RU_8, RU_9} can occupy part of the bandwidth of the channel.

[0065] In this embodiment, all stations among stations 104_1-104_N (N=9) can be served by one downlink data packet sent via the channel, and the transmission power levels (transmission power level) {P_1, P_2, P_3, P_4, P_5} of consecutive RUs {RU_1, RU_2, RU_3, RU_4, RU_5} allocated to users {USR_1, USR_2, USR_3, USR_4, USR_5} increase monotonically, and the transmission power levels (transmission power level) {P_5, P_6, P_7, P_8, P_9} of consecutive RUs {RU_5, RU_6, RU_7, RU_8, RU_9} allocated to users {USR_5, USR_6, USR_7, USR_8, USR_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, 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, the transmit power level P_3 of RU_3 is not higher than the transmit power level P_4 of RU_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 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 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.

[0066] In some embodiments of the present invention, if the maximum data rate is not higher than the data rate of MCS9, Fig.13 The resource unit RU_9 shown may not have the highest frequency of the channel, and Fig.13 The resource unit RU_1 shown in FIG may not have the lowest frequency of the channel. For example, when the data rate of the modulation and coding scheme assigned to RU_5 is not higher than the data rate of MCS6, the resource unit RU_1 may not have the lowest frequency of the channel. Fig.13 The transmit power allocation scenario shown.

[0067] exist Figures 2 to 5 In the above-mentioned embodiment shown, the proposed multi-user downlink OFDMA configuration method applies setting constraints to MCS allocation. Figures 6 to 9 In the above embodiments shown, the proposed multi-user downlink OFDMA configuration method applies setting constraints to RU size allocation. Figures 10 to 13In the above embodiments shown, the proposed multi-user downlink OFDMA configuration method applies setting constraints to transmit power allocation. However, these are only for illustrative purposes and are not meant to limit the present invention. In fact, 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.

[0068] Figures 14 to 17 1 is a schematic diagram showing different multi-user downlink OFDMA configurations for applying setting constraints to RU size allocation, MCS allocation, and transmit power allocation according to an embodiment of the present invention. Figures 14 to 17 The details of the embodiment shown are omitted here for the sake of brevity. Figures 14 to 17 The multi-user downlink OFDMA configuration shown in is for illustration purposes only and is not meant to be limiting of the present invention. Any multi-user downlink OFDMA configuration using the proposed set constraints for RU size allocation, MCS allocation, and transmit power allocation is within the scope of the present invention.

[0069] For example, the data rate of the modulation and coding schemes allocated to stations (which are served by one data packet sent via the channel) and associated with consecutive RUs allocated to the stations is monotonic, the transmit power levels of the consecutive RUs allocated to the stations (which are served by one data packet sent via the channel) are monotonic, and the RU sizes of the consecutive RUs allocated to the stations (which are served by one data packet sent via the channel) are monotonic.

[0070] For another example, the data rate of the modulation and coding scheme allocated to a first station (the first station is some of the stations served by a data packet sent via a channel) and associated with consecutive RUs allocated to the first station increases monotonically, and the data rate of the modulation and coding scheme allocated to a second station (the second station is some of the stations served by a data packet sent via the channel) and associated with consecutive RUs allocated to the second station decreases monotonically, wherein the first station and the second station have a common station; the transmission power level of consecutive RUs allocated to a third station (the third station is some of the stations served by a data packet sent via the channel) increases monotonically, and the transmission power level of consecutive RUs allocated to a fourth station (the fourth station is some of the stations served by a data packet sent via the channel) decreases monotonically, wherein the third station and the fourth station have a common station; the RU size of consecutive RUs allocated to a fifth station (the fifth station is some of the stations served by a data packet sent via the channel) increases monotonically, and the RU size of consecutive RUs allocated to a sixth station (the sixth station is some of the stations served by a data packet sent via the channel) decreases monotonically, wherein the fifth station and the sixth station have a common station. Depending on actual design considerations, the grouping of the first and second stations may be the same as or different from the grouping of the third and fourth stations. Depending on actual design considerations, the grouping of the first and second stations may be the same as or different from the grouping of the fifth and sixth stations. Depending on actual design considerations, the grouping of the third and fourth stations may be the same as or different from the grouping of the fifth and sixth stations.

[0071] Those skilled in the art will readily appreciate that various modifications and variations may be made to the apparatus and methods while maintaining the teachings of the present invention. Therefore, the above disclosure should be interpreted as being limited only by the limits of the appended claims.

Claims

1. A multi-user downlink orthogonal frequency division multiple access (OFDMA) configuration method, comprising: Allocating consecutive resource units RU included in the channel to a plurality of stations respectively; as well as A modulation and coding scheme is assigned to each of the plurality of stations, wherein data rates of the modulation and coding schemes associated with consecutive RUs assigned to a plurality of first stations included in the plurality of stations are monotonically increasing or monotonically decreasing.

2. The multi-user downlink OFDMA configuration method according to claim 1, characterized in that: The plurality of first stations are all stations among the plurality of stations that utilize the channel to perform downlink transmission of a data packet.

3. The multi-user downlink OFDMA configuration method according to claim 2, characterized in that: Also includes: determining a transmit power level for a downlink of each of the plurality of stations; Therein, the transmit power levels determined for consecutive RUs allocated to the plurality of stations are monotonic.

4. The multi-user downlink OFDMA configuration method according to claim 2, characterized in that: Also includes: An RU size of the consecutive RUs allocated to the plurality of stations is determined, wherein the RU size of the consecutive RUs is monotonic.

5. The multi-user downlink OFDMA configuration method according to claim 2, characterized in that: The consecutive RUs include a RU having a lowest frequency of the channel.

6. The multi-user downlink OFDMA configuration method according to claim 2, characterized in that: The consecutive RUs include a RU having a highest frequency of the channel.

7. The multi-user downlink OFDMA configuration method according to claim 1, characterized in that: The multiple stations include multiple second stations, the multiple first stations and the multiple second stations have a common station, the data rate of the modulation and coding scheme associated with consecutive RUs allocated to the multiple first stations increases monotonically, and the data rate of the modulation and coding scheme associated with consecutive RUs allocated to the multiple second stations decreases monotonically.

8. The multi-user downlink OFDMA configuration method according to claim 7, characterized in that: Also includes: determining a transmit power level for a downlink of each of the plurality of stations; The multiple stations include multiple third stations and multiple fourth stations, the multiple third stations and the multiple fourth stations have a common station, the transmission power levels of consecutive RUs allocated to the multiple third stations increase monotonically, and the transmission power levels of consecutive RUs allocated to the multiple fourth stations decrease monotonically.

9. The multi-user downlink OFDMA configuration method according to claim 7, characterized in that: Also includes: Determine an RU size of the consecutive RUs allocated to the multiple stations, wherein the multiple stations include multiple third stations and multiple fourth stations, the multiple third stations and the multiple fourth stations have a common station, the RU size of the consecutive RUs allocated to the multiple third stations increases monotonically, and the RU size of the consecutive RUs allocated to the multiple fourth stations decreases monotonically.

10. The multi-user downlink OFDMA configuration method according to claim 7, characterized in that: The frequency occupied by the consecutive RUs allocated to the multiple second stations is not higher than the frequency occupied by the consecutive RUs allocated to the multiple first stations, and among the modulation and coding schemes allocated to the multiple stations, the data rate of the modulation and coding scheme allocated to the public station is the smallest.

11. The multi-user downlink OFDMA configuration method according to claim 7, characterized in that: The frequency occupied by consecutive RUs allocated to the multiple first stations is not higher than the frequency occupied by consecutive RUs allocated to the multiple second stations, and among the modulation and coding schemes allocated to the multiple stations, the data rate of the modulation and coding scheme allocated to the common station is the largest.

12. A multi-user downlink OFDMA configuration method, comprising: Allocating consecutive RUs included in the channel to a plurality of stations respectively; as well as determining RU sizes of the consecutive RUs, wherein the RU sizes of the consecutive RUs allocated to a plurality of first stations are monotonic, wherein the plurality of first stations are included in the plurality of stations; determining a transmit power level for a downlink of each of the plurality of stations; wherein the plurality of stations include a plurality of second stations, the plurality of first stations and the plurality of second stations have a common station, the RU size of consecutive RUs allocated to the plurality of first stations increases monotonically, and the RU size of consecutive RUs allocated to the plurality of second stations decreases monotonically; The multiple stations include multiple third stations and multiple fourth stations, the multiple third stations and the multiple fourth stations have a common station, the transmission power levels determined for the consecutive RUs allocated to the multiple third stations increase monotonically, and the transmission power levels determined for the consecutive RUs allocated to the multiple fourth stations decrease monotonically.

13. The multi-user downlink OFDMA configuration method according to claim 12, characterized in that: The plurality of first stations are all stations among the plurality of stations that utilize the channel to perform downlink transmission of a data packet.

14. The multi-user downlink OFDMA configuration method according to claim 12, characterized in that: The consecutive RUs include a RU having a lowest frequency of the channel.

15. The multi-user downlink OFDMA configuration method according to claim 12, characterized in that: The consecutive RUs include a RU having a highest frequency of the channel.

16. The multi-user downlink OFDMA configuration method according to claim 12, characterized in that: The plurality of first stations are the same as or different from the plurality of third stations; The plurality of second stations may be the same as or different from the plurality of fourth stations.

17. The multi-user downlink OFDMA configuration method according to claim 12, characterized in that: The frequency occupied by the consecutive RUs allocated to the multiple second stations is not higher than the frequency occupied by the consecutive RUs allocated to the multiple first stations, and among the RU sizes of the consecutive RUs allocated to the multiple stations, the RU size of the RU allocated to the public station is the smallest.

18. The multi-user downlink OFDMA configuration method according to claim 12, characterized in that: The frequency occupied by the consecutive RUs allocated to the multiple first stations is not higher than the frequency occupied by the consecutive RUs allocated to the multiple second stations, and among the RU sizes of the consecutive RUs allocated to the multiple stations, the RU size of the RU allocated to the public station is the largest.

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