A method and apparatus for channel indication in a wireless local area network

Abstract

The present invention discloses a channel indication method and apparatus in a wireless local area network (WLAN). A transmitting station generates and transmits a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier and a channel bonding identifier. The channel bonding identifier is used to indicate whether the channel for data transmission is continuous in the frequency domain. By the above method, the indication of discontinuous channels in the frequency domain of the wireless local area network is satisfied, the available channels for data transmission are increased, and thus the throughput of the system is improved.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular, to a method and apparatus for channel indication in a wireless local area network. Background Art

[0002] With the evolution of wireless local area network (WLAN) standards, WLAN systems obtain higher transmission rates by using larger bandwidths. In the standards, 20 MHz is usually used as the basic bandwidth unit. The 20 MHz bandwidth is adopted in 802.11a, the bandwidth increases to 40 MHz in 802.11n, and has increased to 80 MHz and 160 MHz in 802.11ac. When the bandwidth is greater than 20 MHz, one of the 20 MHz is the primary 20 MHz channel, and the remaining 20 MHz channels are secondary channels. In the current standards, when a station accesses a channel, it must include the primary 20 MHz channel. That is, when the primary 20 MHz channel is occupied, even if other channels are idle, they cannot be used. The channel bandwidths defined in the current standards are four modes: 20 MHz, 40 MHz, 80 MHz, and 160 (80 + 80) MHz.

[0003] In the next-generation WLAN standard 802.11ax, the scenario of dense deployment is mainly studied, and the focus of research has shifted from peak throughput to improving spectral efficiency. For the scenario where stations supporting different WLAN standards coexist densely, for example, stations supporting 802.11n and stations supporting 802.11ax are densely deployed, as Figure 1 shown, where Figure 1 each channel bandwidth is 20 MHz. Among them, 802.11n stations use the 20 MHz bandwidth for transmission. The narrowband transmission of 802.11n stations will cut the spectrum, resulting in discontinuous channels available for 802.11ax stations.

[0004] However, the existing WLAN standards lack indication of frequency-domain discontinuous channels. Summary of the Invention

[0005] In view of this, the present invention provides a method and apparatus for channel indication in a wireless local area network to solve the problem of indicating frequency-domain discontinuous channels.

[0006] On the one hand, the present invention provides a channel indication method in a wireless local area network (WLAN). The channel indication method is used for the downlink between an access point and a station, and is executed by the access point for the downlink multi-user transmission scenario between the access point and multiple stations. The channel indication method first generates a physical layer protocol data unit (PPDU), where the PPDU includes a preamble field and a data field, and the high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier and a channel binding identifier, and the channel binding identifier is used to indicate whether the channel for data transmission is continuous in the frequency domain; then the PPDU is sent.

[0007] Specifically, if the channel binding identifier is a first value, the channel for data transmission is continuous in the frequency domain; if the channel binding identifier is a second value, the channel for data transmission includes multiple non-continuous channels in the frequency domain.

[0008] In a possible implementation, if the channel binding identifier is the first value and the bandwidth identifier is the first value, the channel for data transmission includes a primary 20 MHz channel; if the channel binding identifier is the first value and the bandwidth identifier is the second value, the channel for data transmission includes a primary 20 MHz channel and a secondary 20 MHz channel; if the channel binding identifier is the first value and the bandwidth identifier is the third value, the channel for data transmission includes a primary 20 MHz channel, a secondary 20 MHz channel, and a secondary 40 MHz channel; if the channel binding identifier is the first value and the bandwidth identifier is the fourth value, the channel for data transmission includes a primary 20 MHz channel, a secondary 20 MHz channel, a secondary 40 MHz channel, and a secondary 80 MHz channel; if the channel binding identifier is the second value and the bandwidth identifier is the first value, the channel for data transmission includes a primary 20 MHz and a secondary 40 MHz channel; if the channel binding identifier is the second value and the bandwidth identifier is the second value, the channel for data transmission includes a primary 20 MHz channel and a secondary 80 MHz channel; if the channel binding identifier is the second value and the bandwidth identifier is the third value, the channel for data transmission includes a primary 20 MHz channel, a secondary 20 MHz channel, and a secondary 80 MHz channel; if the channel binding identifier is the second value and the bandwidth identifier is the fourth value, the channel for data transmission includes a primary 20 MHz channel, a secondary 40 MHz channel, and a secondary 80 MHz channel.

[0009] In a possible implementation, if the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel; if the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0010] In a possible implementation, if the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel; if the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 80 MHz channel.

[0011] In a possible implementation, if the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel; if the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel.

[0012] In a possible implementation, if the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel; if the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel; if the bandwidth identifier is the fourth value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0013] On the other hand, the present invention provides a channel indication device in a wireless local area network (WLAN). The channel indication device is an access point and is used for the downlink multi-user transmission scenario between the access point and multiple stations. The channel indication device includes a baseband circuit and a radio frequency circuit. The baseband circuit is used to generate a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field includes a bandwidth identifier and a channel binding identifier. The channel binding identifier is used to indicate whether the channel for data transmission is continuous in the frequency domain. The radio frequency circuit is used to send the PPDU.

[0014] Specifically, if the channel binding identifier is the first value, the channel for data transmission is continuous in the frequency domain; if the channel binding identifier is the second value, the channel for data transmission includes multiple non-continuous channels in the frequency domain.

[0015] In a possible implementation, if the channel binding identifier is the first value and the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel; if the channel binding identifier is the first value and the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel; if the channel binding identifier is the first value and the bandwidth identifier is the third value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel; if the channel binding identifier is the first value and the bandwidth identifier is the fourth value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel; if the channel binding identifier is the second value and the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz and the secondary 40 MHz channels; if the channel binding identifier is the second value and the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 80 MHz channel; if the channel binding identifier is the second value and the bandwidth identifier is the third value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel; if the channel binding identifier is the second value and the bandwidth identifier is the fourth value, the channel for data transmission includes the primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0016] In a possible implementation, if the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel; if the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0017] In a possible implementation, if the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel; if the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 80 MHz channel.

[0018] In a possible implementation, if the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel; if the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel; if the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel.

[0019] In a possible implementation, if the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel; if the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel; if the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel; if the bandwidth identifier is the fourth value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0020] As can be seen from the above solution, the embodiment of the present invention provides a channel indication method and apparatus in a wireless local area network (WLAN). A transmitting station generates and transmits a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier and a channel binding identifier. The channel binding identifier is used to indicate whether the channel for data transmission is continuous in the frequency domain. In this way, the indication of discontinuous channels in the frequency domain in the wireless local area network is satisfied, the available channels for data transmission are increased, and thus the throughput of the system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a channel allocation diagram for the coexistence of 802.11n and 802.11ax stations.

[0022] Figure 2 FIG. is an application scenario diagram of the system of the present invention.

[0023] Figure 3a FIG. is a channel allocation diagram of the system of the present invention.

[0024] Figure 3b FIG. is another channel allocation diagram of the system of the present invention.

[0025] Figure 4 FIG. is a frame structure diagram of a physical layer protocol data unit of the system of the present invention.

[0026] Figure 5 FIG. is a frame structure diagram of HE-SIG-B of a physical layer protocol data unit of the system of the present invention.

[0027] Figure 6 FIG. is a resource unit allocation diagram of HE-SIG-B of a physical layer protocol data unit under a 20 MHz bandwidth.

[0028] Figure 7 FIG. is a resource unit allocation diagram of HE-SIG-B of a physical layer protocol data unit under a 40 MHz bandwidth.

[0029] Figure 8 FIG. is a resource unit allocation diagram of HE-SIG-B of a physical layer protocol data unit under an 80 MHz bandwidth.

[0030] Figure 9 FIG. is a resource unit allocation diagram of HE-SIG-B of a physical layer protocol data unit under a 160 MHz bandwidth.

[0031] Figure 10 FIG. is a flowchart of the method according to Embodiment 1 of the present invention.

[0032] Figure 11 FIG. is a channel indication diagram of Embodiment 1 of Embodiment 1 of the present invention.

[0033] Figure 12 Channel indication diagram for Embodiment 2 of Embodiment 1 of the present invention.

[0034] Figure 13 Channel indication diagram for Embodiment 3 of Embodiment 1 of the present invention.

[0035] Figure 14 Channel indication diagram for Embodiment 4 of Embodiment 1 of the present invention.

[0036] Figure 15 Channel indication diagram for Embodiment 5 of Embodiment 1 of the present invention.

[0037] Figure 16 Channel indication diagram for Embodiment 6 of Embodiment 1 of the present invention.

[0038] Figure 17a First channel indication diagram for Embodiment 7 of Embodiment 1 of the present invention.

[0039] Figure 17b Second channel indication diagram for Embodiment 7 of Embodiment 1 of the present invention.

[0040] Figure 18a First channel indication diagram for Embodiment 8 of Embodiment 1 of the present invention.

[0041] Figure 18b Second channel indication diagram for Embodiment 8 of Embodiment 1 of the present invention.

[0042] Figure 18c Third channel indication diagram for Embodiment 8 of Embodiment 1 of the present invention.

[0043] Figure 18d Fourth channel indication diagram for Embodiment 8 of Embodiment 1 of the present invention.

[0044] Figure 19 Channel indication diagram for Embodiment 9 of Embodiment 1 of the present invention.

[0045] Figure 20a First channel indication diagram for Embodiment 10 of Embodiment 1 of the present invention.

[0046] Figure 20b Second channel indication diagram for Embodiment 10 of Embodiment 1 of the present invention.

[0047] Figure 20c Third channel indication diagram for Embodiment 10 of Embodiment 1 of the present invention.

[0048] Figure 20d Fourth channel indication diagram for Embodiment 10 of Embodiment 1 of the present invention.

[0049] Figure 21 This is the flowchart of the method according to Embodiment 2 of the present invention.

[0050] Figure 22 This is the channel indication diagram according to Embodiment 2 of the present invention.

[0051] Figure 23 This is the channel indication diagram according to Embodiment 3 of the present invention.

[0052] Figure 24 This is the device diagram according to Embodiment 4 of the present invention.

[0053] Figure 25 This is the channel indication diagram according to Embodiment 7 of the present invention.

[0054] Figure 26 This is the channel indication according to Embodiment 8 of the present invention Figure 1 .

[0055] Figure 27 This is the channel indication according to Embodiment 8 of the present invention Figure 2 . Detailed implementation manners

[0056] Embodiments of the present invention can be applied to a WLAN (Wireless Local Area Network in English, Wireless Local Area Network in Chinese). A wireless local area network may include multiple basic service sets (abbreviation: BSS, Basic Service Set in English). The network nodes in a basic service set are stations (abbreviation: STA, Station in English), and the stations include stations of the access point type (abbreviation: AP, Access Point in English) and stations of the non-access point type (abbreviation: Non-AP STA, None Access Point Station in English). Each basic service set may include an AP and multiple Non-AP STAs associated with the AP.

[0057] An access point type of station (abbreviation: AP, English: Access Point), also known as a wireless access point or hotspot, etc. An AP is an access point for mobile users to enter a wired network, mainly deployed in homes, inside buildings, and inside campuses, with a typical coverage radius of dozens of meters to hundreds of meters. Of course, it can also be deployed outdoors. An AP is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect various wireless network clients together and then connect the wireless network to an Ethernet. Currently, the main standard adopted by APs is the IEEE (English: Institute of Electrical and Electronics Engineers, Chinese: Institute of Electrical and Electronics Engineers) 802.11 series. Specifically, an AP can be a terminal device or a network device with a Wi-Fi (English: Wireless Fidelity, Chinese: Wireless Fidelity) chip. Optionally, the AP can be a device supporting the 802.11ax standard.

[0058] A non-access point type of station (English: None Access Point Station, abbreviation: Non-AP STA) can be a wireless communication chip, a wireless sensor, or a wireless communication terminal. For example: a mobile phone supporting Wi-Fi communication function, a tablet computer supporting Wi-Fi communication function, a set-top box supporting Wi-Fi communication function, a smart TV supporting Wi-Fi communication function, a smart wearable device supporting Wi-Fi communication function, and a computer supporting Wi-Fi communication function. Optionally, the station can support the 802.11ax standard.

[0059] Figure 2 It is a system schematic diagram of a typical WLAN deployment scenario, including an AP and 3 STAs. The AP communicates with STA1, STA2, and STA3 respectively. Among them, both the AP and STA1-3 can serve as the first station or the second station.

[0060] It should be noted that for the channel division in WLAN as Figure 3a shown, the channels are numbered. Each number from 0 to 7 represents a 20MHz channel. Among them, channel 0 represents the main 20MHz channel, channel 1 represents the secondary 20MHz channel. Channels 0 and 1 form the main 40MHz channel, channels 2 and 3 form the secondary 40MHz channel, channels 0, 1, 2, and 3 form the main 80MHz channel, and channels 4, 5, 6, and 7 form the secondary 80MHz channel. Among them, channels 4 and 5, channels 5 and 6, and channels 6 and 7 are adjacent respectively.

[0061] It should be understood that in the existing WLAN standard, the composition rule of multiple channels is that there is a unique 20MHz as the primary 20MHz channel. The adjacent 20MHz on the left or right of the primary 20MHz channel is the secondary 20MHz channel (either the left or the right can be selected, but only one can be chosen. Additionally, the left can also be described as below, and the right can also be described as above, where the left or below means a frequency lower than the primary 20MHz channel, and the right or above means a frequency higher than the primary 20MHz channel). The primary 20MHz channel and the secondary 20MHz channel form the primary 40MHz channel; the adjacent 40MHz on the left or right of the primary 40MHz channel is the secondary 40MHz channel (either the left or the right can be selected, but only one can be chosen), and the primary 40MHz channel and the secondary 40MHz channel form the primary 80MHz channel; the 80MHz on the left or right of the primary 80MHz channel is the secondary 80MHz channel (either the left or the right can be selected, but only one can be chosen). When the primary 80MHz channel and the secondary 80MHz channel are adjacent, they form a 160MHz channel, and when the primary 80MHz channel and the secondary 80MHz channel are not adjacent, they form an 80 + 80MHz channel.

[0062] Based on the above rules, the arrangement of channels 0 to 7 can be in Figure 3b multiple ways as shown. Additionally, the numbering order of the 2 20MHz channels in the secondary 40MHz and the 4 20MHz channels in the secondary 80MHz can be either from left to right or from right to left, which is not limited in the present invention. For the sake of convenience in introduction, in all embodiments of the present invention, for the division of channels in WLAN, the 0th channel is used as the primary 20MHz channel.

[0063] It should be noted that the data frame involved in the embodiments of the present invention is a possible 802.11ax data frame. In WLAN, the data frame generally refers to the PPDU (English: Physical Protocol Data Unit, Chinese: Physical Layer Protocol Data Unit). As Figure 4As shown. The PPDU includes a preamble field and a data field. The preamble field includes a legacy preamble field and a high-efficiency preamble field. The legacy preamble field (English: Legacy Preamble) is compatible with existing WLAN standard devices and includes L-STF (English: Legacy Short Training Field), L-LTF (English: Legacy Long Training Field), L-SIG (English: Legacy Signaling Field), and RL-SIG (English: Repeated Legacy Signaling Field). After the Legacy Preamble field are the high-efficiency signaling field A (English: HighEfficiency Signal Field A, abbreviated as HE-SIG-A), the high-efficiency signaling field B (English: High EfficiencySignal Field B, abbreviated as HE-SIG-B), and other high-efficiency preamble fields Other HE Preamble. It should be noted that Other HE Preamble refers to a combination of one or more fields and is not limited to a specific field. After the Other HE Preamble field is the data field (Data). In future possible WLAN standards, the name of the standard or the name of the field, etc. can be replaced with any other name and should not be considered as limiting the protection scope of the present invention. And the description of this data frame also applies to the subsequent embodiments.

[0064] It should be noted that the HE-SIG-B field is encoded separately on each 20MHz channel. The encoding structure is as Figure 5 shown, including a common block field and a user-specific field.

[0065] The common block field includes resource allocation-related information, such as frequency-domain RU allocation information, the RUs allocated to MU-MIMO, and the number of users included in MU-MIMO. The user-specific field includes multiple user block fields. Each user block field includes the information required for two stations to resolve their data. If the number of user fields indicated by the RU allocation signaling in the common block field is odd, the last user block field may only include the information of one station.

[0066] For 20MHz as Figure 6 shown, for the 40MHz PPDU as Figure 7 shown, the common block field and the user-specific field of the station are transmitted on the 20MHz where the station data is the same.

[0067] For an 80 MHz PPDU, the frequency mapping of the common block field and the user-specific field is as Figure 8 shown. The content of HE-SIG-B is the same on the first and third 20 MHz channels from top to bottom in frequency. The information carried on these channels is called HE-SIG-B1. HE-SIG-B1 contains the signaling information of all stations where the data occupies at least part of the subcarriers of A242 or C242. Similarly, the content of HE-SIG-B is the same on the second and fourth 20 MHz channels from top to bottom in frequency. The information carried on these channels is called HE-SIG-B2. HE-SIG-B2 contains the signaling information of all stations where the data occupies at least part of the subcarriers of B242 or D242.

[0068] For a 160 MHz PPDU, the frequency mapping of the common block field and the user-specific field is as Figure 9 shown. The content of HE-SIG-B is the same on the first, third, fifth, and seventh 20 MHz channels from top to bottom in frequency. The information carried on these channels is called HE-SIG-B1. HE-SIG-B1 contains the signaling information of all stations where the data occupies at least part of the subcarriers of A1-242 or C1-242 or A2-242 or C2-242. Similarly, the content of HE-SIG-B is the same on the second, fourth, sixth, and eighth 20 MHz channels from top to bottom in frequency. The information carried on these channels is called HE-SIG-B2. HE-SIG-B2 contains the signaling information of all stations where the data occupies at least part of the subcarriers of B1-242 or D1-242 or B2-242 or D2-242.

[0069] For the sake of convenience in introduction, the description of this PPDU also applies to all embodiments.

[0070] Embodiment 1

[0071] Embodiment 1 of the present invention provides a channel indication method applied to WLAN. This method can be applied to stations, such as: Figure 2 AP and STA1-STA3 in Figure 10 which can support the next-generation WLAN standard, such as the 802.11ax format.

[0072] Step 101: Generate a Physical Layer Protocol Data Unit (PPDU). The PPDU includes a preamble field and a data field. The High Efficiency Signaling field (HE-SIG-A) in the preamble field contains a bandwidth identifier and a channel bonding identifier. The channel bonding identifier is used to indicate whether the channels for data transmission are continuous in the frequency domain.

[0073] Step 102: Transmit the PPDU.

[0074] Specifically, the channel bonding identifier (English: Channel Bonding, abbreviated as: CB) includes at least 1 bit. Here, 1 bit is taken as an example. If the channel bonding identifier is the first value, the channels for data transmission are continuous in the frequency domain. If the channel bonding identifier is the second value, the channels for data transmission include multiple non - continuous channels in the frequency domain.

[0075] It should be noted that the present invention does not limit the first value and the second value in the channel bonding identifier. Both the case where the first value is "0" and the second value is "1", and the case where the first value is "1" and the second value is "0" are within the scope of protection of the present invention. For the convenience of description, the case where the first value is "0" and the second value is "1" is specifically used in the following description.

[0076] Optionally, the present invention jointly indicates the channels for data transmission through the bandwidth identifier and the channel bonding identifier, including at least 10 implementation manners.

[0077] Implementation manner 1: If the channel bonding identifier is the first value and the bandwidth identifier is the first value, the channels for data transmission include the primary 20 MHz channel;

[0078] If the channel bonding identifier is the first value and the bandwidth identifier is the second value, the channels for data transmission include the primary 20 MHz channel and the secondary 20 MHz channel;

[0079] If the channel bonding identifier is the first value and the bandwidth identifier is the third value, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0080] If the channel bonding identifier is the first value and the bandwidth identifier is the fourth value, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0081] If the channel bonding identifier is the second value and the bandwidth identifier is the first value, the channels for data transmission include the primary 20 MHz and the secondary 40 MHz channels;

[0082] If the channel bonding identifier is the second value and the bandwidth identifier is the second value, the channels for data transmission include the primary 20 MHz channel and the secondary 80 MHz channel;

[0083] If the channel binding identifier is the second value and the bandwidth identifier is the third value, the channels for data transmission include a primary 20 MHz channel, a secondary 20 MHz channel, and a secondary 80 MHz channel;

[0084] If the channel binding identifier is the second value and the bandwidth identifier is the fourth value, the channels for data transmission include a primary 20 MHz channel, a secondary 40 MHz channel, and a secondary 80 MHz channel.

[0085] It should be noted that the bandwidth identifier (English: Bandwidth, abbreviated as: BW) includes at least 2 bits. Here, 2 bits are taken as an example for illustration. Further, the value ranges of the first value, the second value, the third value, and the fourth value in the bandwidth identifier are [00, 01, 10, 11]. The present invention does not limit the specific mapping relationship of the values of the bandwidth identifier. For the sake of simplicity of description, the following will be described in conjunction with the first value being "00", the second value being "01", the third value being "10", and the fourth value being "11".

[0086] Specifically, Embodiment 1 will be described in detail in combination with Figure 11 for illustration.

[0087] For channels with continuous frequency domain:

[0088] When CB = 0 and BW = 00, the bandwidth for data transmission is the primary 20 MHz channel, i.e., Channel 0.

[0089] When CB = 0 and BW = 01, the bandwidth for data transmission is the primary 20 MHz channel and the secondary 20 MHz channel, i.e., Channels 0 - 1.

[0090] When CB = 0 and BW = 10, the bandwidth for data transmission is the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel, i.e., Channels 0 - 3.

[0091] When CB = 0 and BW = 11, the bandwidth for data transmission is the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel, i.e., Channels 0 - 7.

[0092] For channels with discontinuous frequency domain:

[0093] When CB = 1 and BW = 00, the bandwidth for data transmission is the primary 20 MHz and the secondary 40 MHz channels, i.e., Channels 0, 2 - 3.

[0094] When CB = 1 and BW = 01, the bandwidth for data transmission is the primary 20 MHz channel and the secondary 80 MHz channel, i.e., Channels 0, 4 - 7.

[0095] When CB = 1 and BW = 10, the bandwidth for data transmission is the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel, i.e., channels 0 - 1, 4 - 7.

[0096] When CB = 1 and BW = 11, the bandwidth for data transmission is the primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel, i.e., channels 0, 2 - 7.

[0097] Embodiment 2:

[0098] If the bandwidth identifier is the first value, the channels for data transmission include the primary 20 MHz channel;

[0099] If the bandwidth identifier is the second value, the channels for data transmission include the primary 20 MHz channel and the secondary 20 MHz channel;

[0100] If the bandwidth identifier is the third value and the channel binding identifier is the first value, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0101] If the bandwidth identifier is the third value and the channel binding identifier is the second value, the channels for data transmission include the primary 20 MHz channel and the secondary 40 MHz channel;

[0102] If the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channel range for data transmission is 160 MHz or 80 + 80 MHz. At this time, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0103] If the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel range for data transmission is 160 MHz or 80 + 80 MHz. At this time, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel.

[0104] Combined with Figure 12 , to illustrate the mapping relationship between the channel binding identifier, the bandwidth identifier, and the channels in Embodiment 2.

[0105] When BW = 00, the bandwidth for data transmission is the primary 20 MHz channel, i.e., channel 0. The value of the channel binding identifier can be 0, 1, or reserved.

[0106] When BW = 01, the bandwidth for data transmission is the primary 20 MHz and the secondary 20 MHz channels, i.e., channels 0 - 1. The value of the channel binding identifier can be 0, 1, or reserved.

[0107] When BW = 10 and CB = 0, the bandwidth for data transmission is the primary 20 MHz and the secondary 20 MHz and the secondary 40 MHz channels, i.e., channels 0 - 3.

[0108] When BW = 10 and CB = 1, the bandwidth for data transmission is the primary 20 MHz and the secondary 40 MHz channels, i.e., channels 0, 2 - 3.

[0109] When BW = 11 and CB = 0, the bandwidth for data transmission is the primary 20 MHz and the secondary 20 MHz and the secondary 40 MHz and the secondary 80 MHz channels, i.e., channels 0 - 7.

[0110] When BW = 11 and CB = 1, the bandwidth for data transmission is the primary 20 MHz and the secondary 20 MHz and the secondary 80 MHz channels, i.e., channels 0 - 1, 4 - 7.

[0111] Embodiment 3:

[0112] If the bandwidth identifier is the first value, the channels for data transmission include the primary 20 MHz channel;

[0113] If the bandwidth identifier is the second value, the channels for data transmission include the primary 20 MHz channel and the secondary 20 MHz channel;

[0114] If the bandwidth identifier is the third value and the channel binding identifier is the first value, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0115] If the bandwidth identifier is the third value and the channel binding identifier is the second value, the channels for data transmission include the primary 20 MHz channel and the secondary 40 MHz channel;

[0116] If the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channel range for data transmission is 160 MHz or 80 + 80 MHz. At this time, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0117] If the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel range for data transmission is 160 MHz or 80 + 80 MHz. At this time, the channels for data transmission include the primary 20 MHz channel and the secondary 80 MHz channel.

[0118] Combined Figure 13 , to illustrate the mapping relationship between the channel binding identifier, the bandwidth identifier, and the channels in Mode 3.

[0119] When BW = 00, the bandwidth of data transmission is the primary 20 MHz channel, i.e., Channel 0. When the bandwidth of data transmission is less than or equal to 40 MHz, the value of the channel binding identifier can be 0, 1, or reserved.

[0120] When BW = 01, the bandwidth of data transmission is the primary 20 MHz and the secondary 20 MHz channels, i.e., Channels 0 - 1. When the bandwidth of data transmission is less than or equal to 40 MHz, the value of the channel binding identifier can be 0, 1, or reserved.

[0121] When BW = 10 and CB = 0, the bandwidth of data transmission is the primary 20 MHz, the secondary 20 MHz, and the secondary 40 MHz channels, i.e., Channels 0 - 3.

[0122] When BW = 10 and CB = 1, the bandwidth of data transmission is the primary 20 MHz and the secondary 40 MHz channels, i.e., Channels 0, 2 - 3.

[0123] When BW = 11 and CB = 0, the bandwidth of data transmission is the primary 20 MHz, the secondary 20 MHz, the secondary 40 MHz, and the secondary 80 MHz channels, i.e., Channels 0 - 7.

[0124] When BW = 11 and CB = 1, the bandwidth of data transmission is the primary 20 MHz and the secondary 80 MHz channels, i.e., Channels 0, 4 - 7.

[0125] Embodiment 4:

[0126] If the bandwidth identifier is the first value, the data transmission channels include the primary 20 MHz channel;

[0127] If the bandwidth identifier is the second value, the data transmission channels include the primary 20 MHz channel and the secondary 20 MHz channel;

[0128] If the bandwidth identifier is the third value and the channel binding identifier is the first value, the data transmission channels include the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0129] If the bandwidth identifier is the third value and the channel binding identifier is the second value, the data transmission channels include the primary 20 MHz channel and the secondary 40 MHz channel;

[0130] If the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the data transmission channel range is 160 MHz or 80 + 80 MHz. At this time, the data transmission channels include the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0131] If the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel range for data transmission is 160 MHz or 80 + 80 MHz. At this time, the channels for data transmission include the primary 20-MHz channel, the secondary 40-MHz channel, and the secondary 80-MHz channel.

[0132] Combined Figure 14 To illustrate the mapping relationship between the channel binding identifier and the bandwidth identifier and the channel in Mode 4.

[0133] When BW = 00, the bandwidth for data transmission is the primary 20-MHz channel, i.e., Channel 0. The value of the channel binding identifier can be 0, 1, or reserved.

[0134] When BW = 01, the bandwidth for data transmission is the primary 20-MHz and the secondary 20-MHz channels, i.e., Channels 0 - 1. The value of the channel binding identifier can be 0, 1, or reserved.

[0135] When BW = 10 and CB = 0, the bandwidth for data transmission is the primary 20-MHz, the secondary 20-MHz, and the secondary 40-MHz channels, i.e., Channels 0 - 3.

[0136] When BW = 10 and CB = 1, the bandwidth for data transmission is the primary 20-MHz and the secondary 40-MHz channels, i.e., Channels 0, 2 - 3.

[0137] When BW = 11 and CB = 0, the bandwidth for data transmission is the primary 20-MHz, the secondary 20-MHz, the secondary 40-MHz, and the secondary 80-MHz channels, i.e., Channels 0 - 7.

[0138] When BW = 11 and CB = 1, the bandwidth for data transmission is the primary 20-MHz, the secondary 40-MHz, and the secondary 80-MHz channels, i.e., Channels 0, 2 - 7.

[0139] Embodiment 5:

[0140] If the bandwidth identifier is the first value, the channels for data transmission include the primary 20-MHz channel;

[0141] If the bandwidth identifier is the second value, the channels for data transmission include the primary 20-MHz channel and the secondary 20-MHz channel;

[0142] If the bandwidth identifier is the third value and the channel binding identifier is the first value, the channels for data transmission include the primary 20-MHz channel, the secondary 20-MHz channel, and the secondary 40-MHz channel;

[0143] If the bandwidth identifier is the third value and the channel binding identifier is the second value, the channels for data transmission include the primary 20-MHz channel and the secondary 40-MHz channel;

[0144] If the bandwidth identifier is the fourth value, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0145] Combined with Figure 15 to illustrate the mapping relationship between the channel binding identifier and the bandwidth identifier and the channels in Mode 5.

[0146] When BW = 00, the bandwidth for data transmission is the primary 20 MHz channel, i.e., Channel 0. The value of the channel binding identifier can be 0, 1, or reserved.

[0147] When BW = 01, the bandwidth for data transmission is the primary 20 MHz and the secondary 20 MHz channels, i.e., Channels 0 - 1. The value of the channel binding identifier can be 0, 1, or reserved.

[0148] When BW = 10 and CB = 0, the bandwidth for data transmission is the primary 20 MHz, the secondary 20 MHz, and the secondary 40 MHz channels, i.e., Channels 0 - 3.

[0149] When BW = 10 and CB = 1, the bandwidth for data transmission is the primary 20 MHz and the secondary 40 MHz channels, i.e., Channels 0, 2 - 3.

[0150] When BW = 11, the bandwidth for data transmission is the primary 20 MHz, the secondary 20 MHz, the secondary 40 MHz, and the secondary 80 MHz channels, i.e., Channels 0 - 7. The value of the channel binding identifier can be 0, 1, or reserved.

[0151] Embodiment 6:

[0152] If the bandwidth identifier is the first value, the channels for data transmission include the primary 20 MHz channel;

[0153] If the bandwidth identifier is the second value, the channels for data transmission include the primary 20 MHz channel and the secondary 20 MHz channel;

[0154] If the bandwidth identifier is the third value, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0155] If the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel;

[0156] If the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channels for data transmission include the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel.

[0157] Combined with Figure 16To illustrate the mapping relationship between the channel binding identifier and the bandwidth identifier on the same channel in Mode 6.

[0158] When BW = 00, the bandwidth for data transmission is the primary 20 MHz channel, i.e., Channel 0. The value of the channel binding identifier can be 0, 1, or reserved.

[0159] When BW = 01, the bandwidth for data transmission is the primary 20 MHz and secondary 20 MHz channels, i.e., Channels 0 - 1. The value of the channel binding identifier can be 0, 1, or reserved.

[0160] When BW = 10, the bandwidth for data transmission is the primary 20 MHz, secondary 20 MHz, and secondary 40 MHz channels, i.e., Channels 0 - 3. The value of the channel binding identifier can be 0, 1, or reserved.

[0161] When BW = 11 and CB = 0, the bandwidth for data transmission is the primary 20 MHz, secondary 40 MHz, and secondary 80 MHz channels, i.e., Channels 0 - 7.

[0162] When BW = 11 and CB = 1, the bandwidth for data transmission is the primary 20 MHz, secondary 20 MHz, and secondary 80 MHz channels, i.e., Channels 0 - 1, 4 - 7.

[0163] Embodiment 7:

[0164] In Embodiment 7, the indicated bandwidth modes are divided into the following 6 types:

[0165] Mode 1: Primary 20 MHz channel;

[0166] Mode 2: Primary 20 MHz channel and secondary 20 MHz channel;

[0167] Mode 3: Primary 20 MHz channel and secondary 40 MHz channel;

[0168] Mode 4: Primary 20 MHz channel, secondary 20 MHz channel, and secondary 40 MHz channel;

[0169] Mode 5: Primary 20 MHz channel and secondary 80 MHz channel, or

[0170] Primary 20 MHz channel, secondary 40 MHz channel, and secondary 80 MHz channel.

[0171] Mode 6: Primary 20 MHz channel, secondary 20 MHz channel, and secondary 80 MHz channel, or primary 20 MHz channel, secondary 20 MHz channel, secondary 40 MHz channel, and secondary 80 MHz channel.

[0172] Regarding the indication method for the above six modes, it is indicated jointly by the BW field (2 bits) and the CB field (1 bit). There are eight indication methods for {BW, CB}, namely {0, 0}, {0, 1}, {1, 0}, {1, 1}, {2, 0}, {2, 1}, {3, 0}, and {3, 1}, as shown in Table 1. In principle, for each channel mode, one or more indication methods can be arbitrarily and non-repeatedly selected from the eight indication methods. In this embodiment, the corresponding method shown in Table 1 is recommended, and the corresponding methods of other indication methods and channel modes are also applicable to this embodiment.

[0173] Table 1

[0174]

[0175] From Figure 17a and 17b it can be seen that for each indication method, the receiving station can obtain HE-SIG-B1 and HE-SIG-B2 from fixed positions (for the 20 MHz channel mode, there is only HE-SIG-B1 and no HE-SIG-B2). Even when one indication corresponds to multiple bandwidth modes, it does not affect the acquisition of HE-SIG-B1 and HE-SIG-B2. When {BW, CB} = {2, 0}, one of HE-SIG-B1 or HE-SIG-B2 can be obtained through the primary 20 MHz channel, and the other part of HE-SIG-B can be obtained through one of the 20 MHz channels in the 40 MHz channel. When the specific frequencies are arranged from high to low, when the primary 20 MHz channel is the odd-numbered 20 MHz channel (see Figure 17a ), the other part of HE-SIG-B can be obtained through the even-numbered 20 MHz channel in the 40 MHz channel; conversely, when the primary 20 MHz channel is the even-numbered 20 MHz channel (see Figure 17b ), the other part of HE-SIG-B can be obtained through the odd-numbered 20 MHz channel in the 40 MHz channel.

[0176] When {BW, CB} = {2, 1}, the primary 20 MHz channel and the secondary 20 MHz channel contain HE-SIG-B1 and HE-SIG-B2, and the 40 MHz channel also contains HE-SIG-B1 and HE-SIG-B2. The receiving station can decide for itself where to obtain HE-SIG-B1 and HE-SIG-B2.

[0177] It should be noted that the description of HE-SIG-B1 and HE-SIG-B2 in this embodiment is also applicable to other embodiments of the present invention.

[0178] Embodiment 8:

[0179] In this embodiment, an 80 MHz channel is divided into two consecutive 40 MHz channels. These two 40 MHz channels can be divided according to different rules. For example, they can be divided into an upper 40 MHz channel (the 40 MHz channel with a relatively higher frequency) and a lower 40 MHz channel (the 40 MHz channel with a relatively lower frequency) according to the frequency; or they can be divided into a near 40 MHz channel and a far 40 MHz channel according to the distance from the main 20 MHz. The patent solution does not limit the division criteria, and their guiding principles are similar. For the sake of convenience, in the following embodiments, the upper 40 MHz channel and the lower 40 MHz channel are used as examples for explanation.

[0180] In Embodiment 8, as Figure 18a The indicated bandwidth modes are divided into the following six types:

[0181] Mode 1: The main 20 MHz channel;

[0182] Mode 2: The main 20 MHz channel and the secondary 20 MHz channel;

[0183] Mode 3: The main 20 MHz channel and the secondary 40 MHz channel;

[0184] Mode 4: The main 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0185] Mode 5: The main 20 MHz channel and the lower 40 MHz channel of the secondary 80 MHz, or the main 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz, or the main 20 MHz channel, the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0186] Mode 6: The main 20 MHz channel, the secondary 20 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz, or the main 20 MHz channel, the secondary 20 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz, or the main 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz, or the main 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz, or the main 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0187] Regarding the indication methods for the above six modes, the indication is jointly carried out through the BW field (2 bits) and the CB field (1 bit). There are eight indication methods for {BW, CB}, namely {0, 0}, {0, 1}, {1, 0}, {1, 1}, {2, 0}, {2, 1}, {3, 0}, and {3, 1}, as shown in Table 1. In principle, for each channel mode, one or more indication methods can be arbitrarily and non-repeatedly selected from the eight indication methods. In this embodiment, the corresponding methods shown in Table 2 are recommended, and the corresponding methods of other indication methods and channel modes are also applicable to this embodiment.

[0188] Table 2

[0189]

[0190]

[0191] Figure 18b Another implementation method includes the following six channel modes:

[0192] Mode 1: The main 20 MHz channel;

[0193] Mode 2: The main 20 MHz channel and the secondary 20 MHz channel;

[0194] Mode 3: The main 20 MHz channel and the secondary 40 MHz channel;

[0195] Mode 4: The main 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0196] Mode 5: The main 20 MHz channel and the upper 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel and the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0197] Mode 6: The main 20 MHz channel, the secondary 20 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0198] Regarding the indication methods for the above six modes, they are indicated jointly by the BW field (2 bits) and the CB field (1 bit). There are a total of eight indication methods for {BW, CB}, namely {0,0}, {0,1}, {1,0}, {1,1}, {2,0}, {2,1}, {3,0}, and {3,1}, as shown in Table 1. In principle, for each channel mode, one or more indication methods can be arbitrarily and non-repeatedly selected from the eight indication methods. In this embodiment, the corresponding methods shown in Table 2 are recommended, and the corresponding methods of other indication methods and channel modes are also applicable to this embodiment.

[0199] Table 3

[0200]

[0201]

[0202] Figure 18c Another implementation method includes the following seven channel modes:

[0203] Mode 1: The main 20 MHz channel;

[0204] Mode 2: The main 20 MHz channel and the secondary 20 MHz channel;

[0205] Mode 3: The main 20 MHz channel and the secondary 40 MHz channel;

[0206] Mode 4: The main 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0207] Mode 5: The main 20 MHz channel and the lower 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel and the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0208] Mode 6: The main 20 MHz channel, the secondary 20 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the main 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0209] Mode 7: The primary 20 MHz channel and the upper 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0210] Regarding the indication method for the above 7 modes, it is indicated jointly by the BW field (2 bits) and the CB field (1 bit). There are eight indication methods for {BW, CB}, namely {0, 0}, {0, 1}, {1, 0}, {1, 1}, {2, 0}, {2, 1}, {3, 0}, and {3, 1}, as shown in Table 1. In principle, for each channel mode, one or more indication methods can be arbitrarily and non-repeatedly selected from the 8 indication methods. In this embodiment, the corresponding method shown in Table 4 is recommended, and the corresponding methods of other indication methods and channel modes are also applicable to this embodiment.

[0211] Table 4

[0212]

[0213] Figure 18d Another implementation manner includes the following 8 channel modes:

[0214] Mode 1: The primary 20 MHz channel;

[0215] Mode 2: The primary 20 MHz channel and the secondary 20 MHz channel;

[0216] Mode 3: The primary 20 MHz channel and the secondary 40 MHz channel;

[0217] Mode 4: The primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0218] Mode 5: The primary 20 MHz channel and the lower 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0219] Mode 6: The primary 20 MHz channel, the secondary 20 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0220] Mode 7: The primary 20 MHz channel and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0221] Mode 8: The primary 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0222] Regarding the indication methods of the above 7 modes, they are indicated jointly by the BW field (2 bits) and the CB field (1 bit). There are eight indication methods for {BW, CB}, namely {0, 0}, {0, 1}, {1, 0}, {1, 1}, {2, 0}, {2, 1}, {3, 0}, and {3, 1}, as shown in Table 1. In principle, for each channel mode, one or more indication methods can be arbitrarily and non-repeatedly selected from the 8 indication methods. In this embodiment, the corresponding method shown in Table 5 is recommended, and the corresponding methods of other indication methods and channel modes are also applicable to this embodiment.

[0223] Table 5

[0224]

[0225] Embodiment 9:

[0226] In this embodiment, a 40MHz channel is divided into two 20MHz channels. These two 20MHz channels can be divided according to different rules. For example, they can be divided into an upper 20MHz channel (the 20MHz channel with relatively higher frequency) and a lower 20MHz channel (the 20MHz channel with relatively lower frequency) according to the frequency; or they can be divided into a near 20MHz channel and a far 20MHz channel according to the distance from the main 20MHz. The patent solution does not limit the division criteria, and the guiding principles are similar. For convenience, in the following embodiment descriptions, the upper 20MHz channel and the lower 20MHz channel are used as examples for explanation. In Embodiment 9, as Figure 19 indicated, the bandwidth modes are divided into the following 6 types:

[0227] Mode 1: Main 20MHz channel;

[0228] Mode 2: Main 20MHz channel and slave 20MHz channel;

[0229] Mode 3: Main 20MHz channel and slave 40MHz channel, or a certain 20MHz channel in the main 20MHz channel and slave 40MHz channel.

[0230] Specifically, when the main 20MHz channel is the odd-numbered channel in the order of frequencies from high to low, this 20MHz channel is the even-numbered 20MHz channel in the slave 40MHz channel; when the main 20MHz channel is the even-numbered channel in the order of frequencies from high to low, this 20MHz channel is the odd-numbered 20MHz channel in the slave 40MHz channel.

[0231] Mode 4: Main 20MHz channel, slave 20MHz channel and the lower 20MHz channel in the slave 40MHz, or the upper 20MHz channel in the main 20MHz channel, slave 20MHz channel and slave 40MHz, or the main 20MHz channel, slave 20MHz channel and slave 40MHz channel.

[0232] Mode 5: Main 20MHz channel and slave 80MHz channel, or the main 20MHz channel, the lower 20MHz channel in the slave 40MHz and slave 80MHz channel, or the main 20MHz channel, the upper 20MHz channel in the slave 40MHz and slave 80MHz channel, or the main 20MHz channel, slave 40MHz channel and slave 80MHz channel.

[0233] Mode 6: Primary 20MHz channel, secondary 20MHz channel, and secondary 80MHz channel, or primary 20MHz channel, secondary 20MHz channel, the lower 20MHz channel of the secondary 40MHz channel, and secondary 80MHz channel, or primary 20MHz channel, secondary 20MHz channel, the upper 20MHz channel of the secondary 40MHz channel, and secondary 80MHz channel, or primary 20MHz channel, secondary 20MHz channel, secondary 40MHz channel, and secondary 80MHz channel.

[0234] Regarding the indication method for the above six modes, it is indicated jointly by the BW field (2 bits) and the CB field (1 bit). There are eight indication methods for {BW, CB}, namely {0,0}, {0,1}, {1,0}, {1,1}, {2,0}, {2,1}, {3,0}, and {3,1}, as shown in Table 1. In principle, for each channel mode, one or more indication methods can be arbitrarily and non-repeatedly selected from the eight indication methods. In this embodiment, the corresponding method shown in Table 6 is recommended, and the corresponding methods of other indication methods and channel modes are also applicable to this embodiment.

[0235] Table 6

[0236]

[0237] Embodiment 10:

[0238] In this embodiment, the secondary 40MHz channel is divided into two 20MHz channels, and the secondary 80MHz channel is divided into two consecutive 40MHz channels. For convenience, in the following description of the embodiments, the two divided 20MHz channels and two 40MHz channels are respectively explained by taking the upper 20MHz channel, the lower 20MHz channel, the upper 40MHz channel, and the lower 40MHz channel as examples.

[0239] In Embodiment 10, as Figure 20a indicated, the bandwidth modes are divided into the following six types:

[0240] Mode 1: Primary 20MHz channel;

[0241] Mode 2: Primary 20MHz channel and secondary 20MHz channel;

[0242] Mode 3: The primary 20 MHz channel and the secondary 40 MHz channel, or one of the 20 MHz channels in the primary 20 MHz channel and the secondary 40 MHz channel. Specifically, when the primary 20 MHz channel is the odd-numbered channel in the order of frequency from high to low, this 20 MHz channel is the even-numbered 20 MHz channel in the secondary 40 MHz channel; when the primary 20 MHz channel is the even-numbered channel in the order of frequency from high to low, this 20 MHz channel is the odd-numbered 20 MHz channel in the secondary 40 MHz channel.

[0243] Mode 4: The primary 20 MHz channel, the secondary 20 MHz channel, and the lower 20 MHz channel in the secondary 40 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the upper 20 MHz channel in the secondary 40 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel.

[0244] Mode 5: The primary 20 MHz channel and the lower 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel, the upper 20 MHz channel in the secondary 40 MHz channel, and the lower 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel, the lower 20 MHz channel in the secondary 40 MHz channel, and the lower 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel and the secondary 80 MHz channel, or the 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel, the upper 20 MHz channel in the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the lower 20 MHz channel in the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0245] Mode 6: The primary 20 MHz channel, the secondary 20 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel.

[0246] Regarding the indication method for the above 6 modes, it is indicated jointly by the BW field (2 bits) and the CB field (1 bit). {BW, CB} has a total of eight indication methods: {0, 0}, {0, 1}, {1, 0}, {1, 1}, {2, 0}, {2, 1}, {3, 0}, and {3, 1}, as shown in Table 1. In principle, for each channel mode, one or more indication methods can be arbitrarily and non-repeatedly selected from the 8 indication methods. In this embodiment, the corresponding method shown in Table 7 is recommended, and the corresponding methods of other indication methods and channel modes are also applicable to this embodiment.

[0247] Table 7

[0248]

[0249] Figure 20b Another implementation method includes the following 6 channel modes:

[0250] Mode 1: The primary 20 MHz channel;

[0251] Mode 2: The primary 20 MHz channel and the secondary 20 MHz channel;

[0252] Mode 3: a primary 20 MHz channel and a secondary 40 MHz channel, or

[0253] a certain 20 MHz channel among the primary 20 MHz channel and the secondary 40 MHz channel.

[0254] Specifically, when the primary 20 MHz channel is the odd-numbered channel in the order of frequency from high to low, this 20 MHz channel is the even-numbered 20 MHz channel among the secondary 40 MHz channels; when the primary 20 MHz channel is the even-numbered channel in the order of frequency from high to low, this 20 MHz channel is the odd-numbered 20 MHz channel among the secondary 40 MHz channels.

[0255] Mode 4: the primary 20 MHz channel, the secondary 20 MHz channel, and the lower 20 MHz channel among the secondary 40 MHz channels, or the primary 20 MHz channel, the secondary 20 MHz channel, and the upper 20 MHz channel among the secondary 40 MHz channels, or the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channels.

[0256] Mode 5: the primary 20 MHz channel and the upper 40 MHz channel among the secondary 80 MHz channels, or the primary 20 MHz channel, the upper 20 MHz channel among the secondary 40 MHz channels, and the upper 40 MHz channel among the secondary 80 MHz channels, or the primary 20 MHz channel, the lower 20 MHz channel among the secondary 40 MHz channels, and the upper 40 MHz channel among the secondary 80 MHz channels, or the primary 20 MHz channel and the secondary 80 MHz channels, or the primary 20 MHz channel, the secondary 40 MHz channels, and the upper 40 MHz channel among the secondary 80 MHz channels, or the primary 20 MHz channel, the upper 20 MHz channel among the secondary 40 MHz channels, and the secondary 80 MHz channels, or the primary 20 MHz channel, the lower 20 MHz channel among the secondary 40 MHz channels, and the secondary 80 MHz channels, or the primary 20 MHz channel, the secondary 40 MHz channels, and the secondary 80 MHz channels.

[0257] Mode 6: The primary 20 MHz channel, the secondary 20 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel.

[0258] Regarding the indication method for the above 6 modes, it is indicated jointly by the BW field (2 bits) and the CB field (1 bit). There are eight indication methods for {BW, CB}, namely {0, 0}, {0, 1}, {1, 0}, {1, 1}, {2, 0}, {2, 1}, {3, 0}, and {3, 1}, as shown in Table 1. In principle, for each channel mode, one or more indication methods can be arbitrarily and non-repeatedly selected from the 8 indication methods. In this embodiment, the corresponding method shown in Table 8 is recommended, and the corresponding methods of other indication methods and channel modes are also applicable to this embodiment.

[0259] Table 8

[0260]

[0261] Figure 20c Another implementation manner includes the following 7 channel modes:

[0262] Mode 1: The primary 20 MHz channel;

[0263] Mode 2: The primary 20 MHz channel and the secondary 20 MHz channel;

[0264] Mode 3: a primary 20 MHz channel and a secondary 40 MHz channel, or

[0265] a 20 MHz channel among the primary 20 MHz channel and the secondary 40 MHz channel. Specifically, when the primary 20 MHz channel is the odd-numbered channel in the order of frequencies from high to low, this 20 MHz channel is the even-numbered 20 MHz channel among the secondary 40 MHz channel; when the primary 20 MHz channel is the even-numbered channel in the order of frequencies from high to low, this 20 MHz channel is the odd-numbered 20 MHz channel among the secondary 40 MHz channel.

[0266] Mode 4: the primary 20 MHz channel, the secondary 20 MHz channel, and the lower 20 MHz channel among the secondary 40 MHz channels, or the primary 20 MHz channel, the secondary 20 MHz channel, and the upper 20 MHz channel among the secondary 40 MHz channels, or the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channels.

[0267] Mode 5: the primary 20 MHz channel and the lower 40 MHz channel among the secondary 80 MHz channels, or the primary 20 MHz channel, the upper 20 MHz channel among the secondary 40 MHz channels, and the lower 40 MHz channel among the secondary 80 MHz channels, or the primary 20 MHz channel, the lower 20 MHz channel among the secondary 40 MHz channels, and the lower 40 MHz channel among the secondary 80 MHz channels, or the primary 20 MHz channel and the secondary 80 MHz channels, or the primary 20 MHz channel, the secondary 40 MHz channels, and the lower 40 MHz channel among the secondary 80 MHz channels, or the primary 20 MHz channel, the upper 20 MHz channel among the secondary 40 MHz channels, and the secondary 80 MHz channels, or the primary 20 MHz channel, the lower 20 MHz channel among the secondary 40 MHz channels, and the secondary 80 MHz channels, or the primary 20 MHz channel, the secondary 40 MHz channels, and the secondary 80 MHz channels.

[0268] Mode 6: The primary 20 MHz channel, the secondary 20 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel.

[0269] Mode 7: The primary 20 MHz channel and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel.

[0270] Regarding the indication method of the above 7 modes, it is indicated jointly by the BW field (2 bits) and the CB field (1 bit). {BW, CB} has a total of eight indication methods: {0, 0}, {0, 1}, {1, 0}, {1, 1}, {2, 0}, {2, 1}, {3, 0}, and {3, 1}, as shown in Table 1. In principle, for each channel mode, one or more indication methods can be arbitrarily and non-repeatedly selected from the 8 indication methods. In this embodiment, the corresponding method shown in Table 9 is recommended, and the corresponding methods of other indication methods and channel modes are also applicable to this embodiment.

[0271] Table 9

[0272]

[0273] Figure 20d Another implementation includes the following eight channel modes:

[0274] Mode 1: Primary 20 MHz channel;

[0275] Mode 2: Primary 20 MHz channel and secondary 20 MHz channel;

[0276] Mode 3: Primary 20 MHz channel and secondary 40 MHz channel, or

[0277] One of the 20 MHz channels in the primary 20 MHz channel and the secondary 40 MHz channel.

[0278] Specifically, when the primary 20 MHz channel is the odd-numbered channel in the order of frequencies from high to low, this 20 MHz channel is the even-numbered 20 MHz channel in the secondary 40 MHz channel; when the primary 20 MHz channel is the even-numbered channel in the order of frequencies from high to low, this 20 MHz channel is the odd-numbered 20 MHz channel in the secondary 40 MHz channel.

[0279] Mode 4: The primary 20 MHz channel, the lower 20 MHz channel in the secondary 20 MHz channel and the secondary 40 MHz channel, or the primary 20 MHz channel, the upper 20 MHz channel in the secondary 20 MHz channel and the secondary 40 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel and the secondary 40 MHz channel.

[0280] Mode 5: The primary 20 MHz channel and the lower 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel, the upper 20 MHz channel in the secondary 40 MHz channel and the lower 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel, the lower 20 MHz channel in the secondary 40 MHz channel and the lower 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel and the lower 40 MHz channel in the secondary 80 MHz channel, or the primary 20 MHz channel, the upper 20 MHz channel in the secondary 40 MHz channel and the secondary 80 MHz channel, or the primary 20 MHz channel, the lower 20 MHz channel in the secondary 40 MHz channel and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 40 MHz channel and the secondary 80 MHz channel.

[0281] Mode 6: The primary 20 MHz channel, the secondary 20 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the lower 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel.

[0282] Mode 7: The primary 20 MHz channel and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the upper 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel, or the primary 20 MHz channel, the lower 20 MHz channel of the secondary 40 MHz channel, and the upper 40 MHz channel of the secondary 80 MHz channel.

[0283] Mode 8: One of the 20 MHz channels of the primary 20 MHz channel and the secondary 40 MHz channel. Specifically, when the primary 20 MHz channel is the odd-numbered channel in the frequency arrangement from high to low, this 20 MHz channel is the odd-numbered 20 MHz channel of the secondary 40 MHz channel; when the primary 20 MHz channel is the even-numbered channel in the frequency arrangement from high to low, this 20 MHz channel is the even-numbered 20 MHz channel of the secondary 40 MHz channel.

[0284] Regarding the indication methods for the above 8 modes, the indication is jointly carried out through the BW field (2 bits) and the CB field (1 bit). There are eight indication methods for {BW, CB}, namely {0,0}, {0,1}, {1,0}, {1,1}, {2,0}, {2,1}, {3,0}, and {3,1}, as shown in Table 1. In principle, for each channel mode, one or more indication methods can be arbitrarily selected without repetition from the 8 indication methods. In this embodiment, the corresponding method shown in Table 10 is recommended, and the corresponding methods of other indication methods and channel modes are also applicable to this embodiment.

[0285] Table 10

[0286]

[0287] An embodiment of the present invention provides a channel indication method in a wireless local area network (WLAN). A transmitting station generates and transmits a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier and a channel binding identifier. The channel binding identifier is used to indicate whether the channel for data transmission is continuous in the frequency domain. Through the above method, the indication of discontinuous channels in the frequency domain of the wireless local area network is satisfied, the available channels for data transmission are increased, and thus the throughput of the system is improved.

[0288] Embodiment 2

[0289] Embodiment 2 of the present invention provides a channel indication method applied to a WLAN. This method can be applied to a station, for example: Figure 2 the AP and STA1-STA3 in, and this station can support the next-generation WLAN standard, for example: the 802.11ax format. Figure 21 is an exemplary block diagram of this channel indication method, and the specific steps are as follows:

[0290] Step 201: Generate a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier and a 20 MHz channel identifier. When the bandwidth identifier indicates that the channel for data transmission is greater than 40 MHz, the 20 MHz channel identifier is used to indicate whether the 20 MHz channel is available.

[0291] Step 202: Transmit the PPDU.

[0292] Specifically, the 20 MHz channel identifier includes at least 1 bit. Here, 1 bit is taken as an example. If the 20 MHz channel identifier is a first value, the 20 MHz channel is unavailable. If the 20 MHz channel identifier is a second value, the 20 MHz channel is available.

[0293] It should be noted that the present invention does not limit the first value and the second value in the 20 MHz channel identifier. The first value being "0" and the second value being "1", or the first value being "1" and the second value being "0", both of the above situations are within the scope of protection of the present invention. For the convenience of description, hereinafter, the first value being "0" and the second value being "1" will be specifically used for description.

[0294] Specifically, the sending station indicates the channel for data transmission through the bandwidth identifier and the 20 MHz channel identifier:

[0295] If the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel;

[0296] If the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel;

[0297] If the bandwidth identifier is the third value and the 20 MHz channel identifier is the first value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel;

[0298] If the bandwidth identifier is the third value and the 20 MHz channel identifier is the second value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0299] If the bandwidth identifier is the fourth value and the 20 MHz channel identifier is the first value, the channel range for data transmission is 160 MHz or 80 + 80 MHz, and does not include the secondary 20 MHz channel, that is, it includes the primary 20 MHz channel and the secondary 80 MHz channel, or includes the primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0300] If the bandwidth identifier is the fourth value and the 20 MHz channel identifier is the second value, the channel bandwidth for data transmission is 160 MHz or 80 + 80 MHz, and includes the secondary 20 MHz channel, that is, it includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel, or includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0301] It should be noted that the bandwidth identifier includes at least 2 bits, and the 20 MHz channel identifier includes at least 1 bit. For the convenience of description, in this embodiment, an example where the bandwidth identifier includes 2 bits and the 20 MHz channel identifier includes 1 bit is used for illustration.

[0302] It should be noted that the definitions of the first value to the fourth value in the bandwidth identifier have been explained in Embodiment 1, and this definition also applies to subsequent embodiments.

[0303] Combined with Figure 22 , the mapping relationship between the 20 MHz channel identifier and the bandwidth identifier in the same channel will be described.

[0304] When BW = 00, the bandwidth of data transmission is the primary 20 MHz channel, i.e., channel 0. When the bandwidth of data transmission is less than or equal to 40 MHz, the value of the channel binding identifier can be 0, 1, or reserved.

[0305] When BW = 01, the bandwidth of data transmission is the primary 20 MHz and the secondary 20 MHz channels, i.e., channels 0 - 1. When the bandwidth of data transmission is less than or equal to 40 MHz, the value of the channel binding identifier can be 0, 1, or reserved.

[0306] When BW = 10 and the secondary 20 MHz channel identifier = 0, the bandwidth of data transmission is the primary 20 MHz and the secondary 40 MHz channels, i.e., channels 0, 2 - 3.

[0307] When BW = 10 and the secondary 20 MHz channel identifier = 1, the bandwidth of data transmission is the primary 20 MHz, the secondary 20 MHz, and the secondary 40 MHz channels, i.e., channels 0 - 3.

[0308] When BW = 11 and the secondary 20 MHz channel identifier = 0, the bandwidth of data transmission is the primary 20 MHz and the secondary 80 MHz channels, i.e., channels 0, 4 - 7. Or, the bandwidth of data transmission is the primary 20 MHz, the secondary 40 MHz, and the secondary 80 MHz channels, i.e., channels 0, 2 - 7.

[0309] When BW = 11 and the secondary 20 MHz channel identifier = 1, the bandwidth of data transmission is the primary 20 MHz, the secondary 20 MHz, the secondary 40 MHz, and the secondary 80 MHz channels, i.e., channels 0 - 7. Or, the bandwidth of data transmission is the primary 20 MHz, the secondary 20 MHz, and the secondary 80 MHz channels, i.e., channels 0 - 1, 4 - 7.

[0310] An embodiment of the present invention provides a channel indication method in a wireless local area network (WLAN). A transmitting station generates and transmits a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high - efficiency signaling field (HE - SIG - A) of the preamble field contains a bandwidth identifier and a secondary 20 MHz channel identifier. When the bandwidth identifier indicates that the channel for data transmission is greater than 40 MHz, the secondary 20 MHz channel identifier is used to indicate whether the secondary 20 MHz channel is available. In this way, the indication of the frequency - domain discontinuous channels in the wireless local area network is satisfied, the available channels for data transmission are increased, and thus the throughput of the system is improved.

[0311] Embodiment 3

[0312] Embodiment 3 of the present invention provides a channel indication method applied to WLAN. This method can be applied to a station, for example: Figure 2 AP and STA1-STA3 in

[0313] In this embodiment, the channel for data transmission is indicated by the bandwidth identifier in the PPDU, where the bandwidth (English: BandWidth, abbreviated as: BW) identifier includes at least 2 bits.

[0314] Combined with Figure 23 , the mapping relationship between the bandwidth identifier and the channel is described.

[0315] When BW = 00, it represents that the current data transmission channel includes the primary 20MHz channel.

[0316] When BW = 01, it represents that the current data transmission channel includes the primary 20MHz channel and the secondary 20MHz channel.

[0317] When BW = 10, it represents that the current data transmission channel includes the primary 20MHz channel and the secondary 40MHz channel; or includes the primary 20MHz channel, the secondary 20MHz channel, and the secondary 40MHz channel.

[0318] When BW = 11, it represents that the current data transmission channel includes the primary 20MHz channel and the secondary 80MHz channel; or includes the primary 20MHz channel, the secondary 20MHz channel, and the secondary 80MHz channel; or includes the primary 20MHz channel, the secondary 40MHz channel, and the secondary 80MHz channel; or includes the primary 20MHz channel, the secondary 20MHz channel, the secondary 40MHz channel, and the secondary 80MHz channel.

[0319] When BW = 2, one of HE-SIG-B1 or HE-SIG-B2 can be obtained through the primary 20MHz channel, and the other part of HE-SIG-B can be obtained through one of the 20MHz channels in the secondary 40MHz channel. Specifically, when the primary 20MHz channel is the odd-numbered 20MHz channel in the order of decreasing frequency, the other part of HE-SIG-B can be obtained through the even-numbered 20MHz channel in the secondary 40MHz channel; conversely, when the primary 20MHz channel is the even-numbered 20MHz channel, the other part of HE-SIG-B can be obtained through the odd-numbered 20MHz channel in the secondary 40MHz channel.

[0320] When BW = 3, one of HE-SIG-B1 or HE-SIG-B2 can be obtained through the primary 20 MHz channel, and the other part of HE-SIG-B can be obtained by taking one of the 20 MHz channels from 80 MHz. Specifically, when the frequencies are arranged from high to low, when the primary 20 MHz channel is the odd-numbered 20 MHz channel, the other part of HE-SIG-B can be obtained by taking any of the even-numbered 20 MHz channels from the 80 MHz channel; conversely, when the primary 20 MHz channel is the even-numbered 20 MHz channel, the other part of HE-SIG-B can be obtained by taking any of the odd-numbered 20 MHz channels from the 40 MHz channel.

[0321] An embodiment of the present invention provides a channel indication method in a wireless local area network (WLAN). A transmitting station generates and transmits a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier. In this way, the indication of discontinuous channels in the frequency domain of the wireless local area network is satisfied, the available channels for data transmission are increased, and thus the throughput of the system is improved.

[0322] Embodiment 4

[0323] Please refer to Figure 24 , which is a schematic block diagram of a channel indication device in a wireless local area network provided in Embodiment 4 of the present invention. This device is, for example, an access point, a dedicated circuit, or a chip that implements related functions. The access point 1000 includes a processor 1010, a memory 1020, a baseband circuit 1030, a radio frequency circuit 1040, and an antenna 1050. The device for frame transmission can be Figure 2 the AP shown in

[0324] Specifically, the processor 1010 controls the operation of the access point 1000. The memory 1020 may include read-only memory and random access memory, and provides instructions and data to the processor 1010. The processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic device. A part of the memory 1020 may also include non-volatile random access memory (NVRAM). The baseband circuit 1030 is used to generate a baseband signal to be transmitted, or decode a received baseband signal. The radio frequency circuit 1040 is used to modulate a low-frequency baseband signal onto a high-frequency carrier signal, and the high-frequency carrier signal is transmitted through the antenna 1050. The radio frequency circuit is also used to demodulate a high-frequency signal received by the antenna 1050 into a low-frequency carrier signal. Each component of the station 1000 is coupled together through a bus 1060, where the bus system 1060 includes, in addition to a data bus, a power bus, a control bus, and a status signal bus. However, for the sake of clarity, all kinds of buses are labeled as the bus system 1060 in the figure. It should be noted that the above description of the access point structure can be applied to subsequent embodiments.

[0325] The baseband circuit 1030 is used to generate a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier and a channel binding identifier. The channel binding identifier is used to indicate whether the channels for data transmission are continuous in the frequency domain.

[0326] The radio frequency circuit 1040 is used to transmit the PPDU.

[0327] Specifically, if the channel binding identifier is a first value, the channels for data transmission are continuous in the frequency domain; if the channel binding identifier is a second value, the channels for data transmission include multiple non-continuous channels in the frequency domain.

[0328] Optionally, the channel indicating device jointly indicates the channels for data transmission through the bandwidth identifier and the channel binding identifier, and the indication method is as follows:

[0329] Method 1:

[0330] If the channel binding identifier is a first value and the bandwidth identifier is a first value, the channels for data transmission include a primary 20 MHz channel;

[0331] If the channel binding identifier is a first value and the bandwidth identifier is a second value, the channels for data transmission include a primary 20 MHz channel and a secondary 20 MHz channel;

[0332] If the channel binding identifier is the first value and the bandwidth identifier is the third value, the channels for data transmission include a primary 20 MHz channel, a secondary 20 MHz channel, and a secondary 40 MHz channel;

[0333] If the channel binding identifier is the first value and the bandwidth identifier is the fourth value, the channels for data transmission include a primary 20 MHz channel, a secondary 20 MHz channel, a secondary 40 MHz channel, and a secondary 80 MHz channel;

[0334] If the channel binding identifier is the second value and the bandwidth identifier is the first value, the channels for data transmission include a primary 20 MHz and a secondary 40 MHz channel;

[0335] If the channel binding identifier is the second value and the bandwidth identifier is the second value, the channels for data transmission include a primary 20 MHz channel and a secondary 80 MHz channel;

[0336] If the channel binding identifier is the second value and the bandwidth identifier is the third value, the channels for data transmission include a primary 20 MHz channel, a secondary 20 MHz channel, and a secondary 80 MHz channel;

[0337] If the channel binding identifier is the second value and the bandwidth identifier is the fourth value, the channels for data transmission include a primary 20 MHz channel, a secondary 40 MHz channel, and a secondary 80 MHz channel.

[0338] Method 2:

[0339] If the bandwidth identifier is the first value, the channels for data transmission include a primary 20 MHz channel;

[0340] If the bandwidth identifier is the second value, the channels for data transmission include a primary 20 MHz channel and a secondary 20 MHz channel;

[0341] If the bandwidth identifier is the third value and the channel binding identifier is the first value, the channels for data transmission include a primary 20 MHz channel, a secondary 20 MHz channel, and a secondary 40 MHz channel;

[0342] If the bandwidth identifier is the third value and the channel binding identifier is the second value, the channels for data transmission include a primary 20 MHz channel and a secondary 40 MHz channel;

[0343] If the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channels for data transmission include a primary 20 MHz channel, a secondary 20 MHz channel, a secondary 40 MHz channel, and a secondary 80 MHz channel;

[0344] If the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channels for data transmission include a primary 20 MHz channel, a secondary 40 MHz channel, and a secondary 80 MHz channel.

[0345] Method 3:

[0346] If the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel;

[0347] If the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel;

[0348] If the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0349] If the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel;

[0350] If the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel;

[0351] If the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 80 MHz channel.

[0352] Method 4:

[0353] If the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel;

[0354] If the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel;

[0355] If the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0356] If the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel;

[0357] If the bandwidth identifier is the fourth value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel;

[0358] If the bandwidth identifier is the fourth value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel.

[0359] Method 5:

[0360] If the bandwidth identifier is the first value, the channel for data transmission includes the primary 20 MHz channel;

[0361] If the bandwidth identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 20 MHz channel;

[0362] If the bandwidth identifier is the third value and the channel binding identifier is the first value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 40 MHz channel;

[0363] If the bandwidth identifier is the third value and the channel binding identifier is the second value, the channel for data transmission includes the primary 20 MHz channel and the secondary 40 MHz channel;

[0364] If the bandwidth identifier is the fourth value, the channel for data transmission includes the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel.

[0365] It should be noted that the channel mapping relationships of Methods 1-5 are as Figures 6 - 10 shown and have been elaborated in detail in Embodiment 1.

[0366] It should be noted that the other channel indication methods in Embodiments 1-3 are also used in the channel indication device of Embodiment 4.

[0367] An embodiment of the present invention provides a channel indication device in a wireless local area network (WLAN). The baseband circuit generates a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field includes a bandwidth identifier and a secondary 20 MHz channel identifier. When the bandwidth identifier indicates that the channel for data transmission is greater than 40 MHz, the secondary 20 MHz channel identifier is used to indicate whether the secondary 20 MHz channel is available. Through the above method, the indication of discontinuous channels in the frequency domain of the wireless local area network is satisfied, the available channels for data transmission are increased, and thus the throughput of the system is improved.

[0368] Embodiment 5

[0369] Embodiment 5 of the present invention provides a channel indication method applied to a WLAN. This method can be applied to a station, such as: Figure 2 the AP and STA1-STA3 in, and this station can support the next-generation WLAN standard, such as: the 802.11ax format.

[0370] In this embodiment, the channel for data transmission is indicated by the bandwidth identifier in the PPDU, where the bandwidth (abbreviation: BW) identifier includes at least 3 bits.

[0371] The channels for data transmission include the following 8 modes:

[0372] Mode 1: Primary 20MHz channel;

[0373] Mode 2: Primary 20MHz and secondary 20MHz channels;

[0374] Mode 3: At least one 20MHz channel among the primary 20MHz channel, the secondary 20MHz channel, and the secondary 40MHz channel;

[0375] Mode 4: At least includes a 20MHz channel in the primary 20MHz channel and the secondary 40MHz channel that is different in parity from the primary 20MHz channel position, and does not include any 20MHz channel in the secondary 80MHz channel.

[0376] Here, different in parity means that when arranged from high to low or from low to high in frequency, one is in an odd number of 20MHz channels and the other is in an even number of 20MHz channels.

[0377] Mode 5: At least includes a 20MHz channel among the primary 20MHz channel, the secondary 20MHz channel, and the secondary 80MHz channel;

[0378] Mode 6: At least includes a 20MHz channel in the primary 20MHz channel, a 20MHz channel in the secondary 40MHz channel that is different in parity from the primary 20MHz channel, and at least one 20MHz channel in the secondary 80MHz channel;

[0379] Mode 7: At least includes the first 20MHz channel among the two 20MHz channels in the primary 20MHz channel and the secondary 80MHz channel that are different in parity from the primary 20MHz channel;

[0380] Mode 8: At least includes the second 20MHz channel among the two 20MHz channels in the primary 20MHz channel and the secondary 80MHz channel that are different in parity from the primary 20MHz channel;

[0381] The first 20MHz channel and the second 20MHz channel can be defined in different ways, which are not limited in this patent. For example: the first 20MHz is the lower frequency one of the two 20MHz channels with different parities from the main 20MHz channel in the 80MHz channel, and the second 20MHz is the higher frequency one of the two 20MHz channels with different parities from the main 20MHz channel in the 80MHz channel; or vice versa. Another example: the first 20MHz is the one with a closer frequency interval rate to the main 20MHz channel among the two 20MHz channels with different parities from the main 20MHz channel in the 80MHz channel, and the second 20MHz is the one with a farther frequency interval rate from the main 20MHz channel among the two 20MHz channels with different parities from the main 20MHz channel in the 80MHz channel; or vice versa.

[0382] It should be noted that when the channel is the main 20MHz channel and the 20MHz channel with the same parity as the main 20MHz channel in the 40MHz, it can be labeled as mode 3 or mode 4. As a result, while the receiving station receives a part of the HE-SIG-B on the main 20MHz channel, it attempts to receive another part of the HE-SIG-B on the secondary 20MHz channel or the 20MHz channel with different parities from the main 20MHz channel in the 40MHz, but the reception fails. Since there is no HE-SIG-B related information transmitted on the 20MHz channel or the 20MHz channel with different parities from the main 20MHz channel in the 40MHz, the reception failure does not result in information loss.

[0383] It should be added that when the channel includes the main 20MHz channel and at least one 20MHz channel in the 80MHz, but does not include any 20MHz channel with different parities from the main 20MHz channel, it can be labeled as mode 5, 6, 7, or 8. As a result, while the receiving station receives a part of the HE-SIG-B on the main 20MHz channel, it attempts to receive another part of the HE-SIG-B on the 20MHz channel with different parities from the main 20MHz channel indicated by this mode, but the reception fails. Since there is no HE-SIG-B related information transmitted on the 20MHz channel with different parities from the main 20MHz channel, the reception failure does not result in information loss.

[0384] The present invention does not limit the correspondence between the bandwidth identifier and the 8 modes. The following correspondence is preferred:

[0385]

[0386] The correspondence between the above 8 modes and the channels is shown in Table 11.

[0387] Table 11

[0388]

[0389]

[0390]

[0391]

[0392] The channel identifiers used in the table are the logical identifiers of the channels. Generally speaking, channel identifier 0 refers to the primary 20 MHz channel, channel identifier 1 refers to the secondary 20 MHz channel, channel identifiers 2-3 refer to the secondary 40 MHz channels, and channel identifiers 4-7 refer to the secondary 80 MHz channels. The above description is a common mapping relationship between the channel identifier and the channel. There are also other mapping relationships between the channel identifier and the channel, which are not limited in the present invention.

[0393] For the sake of simplicity in the following description, the HE-SIG-B on the primary channel is referred to as HE-SIG-B 1 here. HE-SIG-B 1 is Figure 6 as shown in Figures 7, 8, and 9, and is replicated on the channels with the same parity as the primary channel. The common part of this HE-SIG-B 1 includes the RU allocation signaling of the primary 20M channel and the 20M channels with the same parity as the primary channel. The common part of HE-SIG-B 2 includes the RU allocation signaling of the 20M channels with different parity from the primary channel and is replicated on these multiple 20M channels. Assuming that the length of the RU allocation signaling for each 20M channel is N bits, the following description takes 8 bits as an example.

[0394] In the above 8 modes, each mode carries 2 pieces of information. The first piece of information is to indicate the lengths of the common parts of the receiving node HE-SIG-B 1 and HE-SIG-B 2 (here, the common parts of HE-SIG-B 1 and HE-SIG-B 2 are of equal length); the second piece of information indicates on which 20M channel the receiving node HE-SIG B 2 receives HE-SIG-B2. It should be noted here that the receiving node can definitely receive HE-SIG-B1 on the primary 20M channel. For example, mode 3 indicates that the lengths of the common parts of the receiving node HE-SIG-B 1 and HE-SIG-B 2 are both 16 bits (here only the length of the RU allocation signaling for the 20M channel is counted), and HE-SIG-B2 is received on the channel with the logical identifier 1. Another example, mode 8 indicates that the lengths of the common parts of the receiving node HE-SIG-B 1 and HE-SIG-B 2 are both 32 bits, and HE-SIG-B 2 is received on the 20M channel with the logical identifier 7. Therefore, the above 8 modes indicate that the receiving node can correctly receive HE-SIG-B 1 and HE-SIG-B 2.

[0395] In addition, there is a special RU allocation signaling in the RU allocation signaling of the HE-SIG-B 20M channel, namely 242(0), which indicates that no data of any station is transmitted on the 242 subcarriers corresponding to the 20M that can transmit information. That is to say, no data transmission is performed on this 20M channel.

[0396] Combined with the 8 modes of HE-SIG-A and the RU allocation signaling of each 20M included in the common part of HE-SIG-B1 and HE-SIG-B2, the receiving node can know on which channels to receive data. Example: Suppose the channels for data transmission are (0 1 2). The sending node sets the bandwidth identification bit of HE-SIG-A in the physical layer preamble to mode 3. In addition, HE-SIG-B1 contains the RU allocation signaling for channels 0 and 2, and HE-SIG-B2 contains the RU allocation signaling for channels 1 and 3, where the RU allocation signaling for channel 3 is 242(0). After receiving HE-SIG-A, the receiver knows it is mode 3 through the bandwidth identification bit, that is, the lengths of the common parts of HE-SIG-B 1 and HE-SIG-B 2 are both 16 bits. Receive HE-SIG-B1 on the channel logically represented as 0 (main 20M channel), and receive HE-SIG-B2 on the channel with logical identification 1. Combining the RU allocation signaling 242(0) of channel 3 included in HE-SIG-B2 with logical identification 3, it is known that the channels for data transmission are (0 1 2).

[0397] It should be noted that the actually used channels indicated by each mode in Table 11 overlap, but this does not affect the receiving node's knowledge of the length of the common part of HE-SIG-B and on which 20M channel to receive HE-SIG-B 2. Therefore, the above mode indication can correctly tell the receiving node which 20M channels have data transmission. A preferred implementation method is to place the overlapping actually used channel situations in only one mode, so that the actually used channel situations indicated by each mode do not overlap. Example: The overlapping situations of the actually used channels indicated by mode 3 and mode 4 in Table 11 are (0,1,3)(0,1,2,3) and (0,2). To avoid overlap, the above 3 actually used channel situations are only placed in mode 3 and removed from mode 4. It should be noted that the above channel overlapping situation also applies to other embodiments.

[0398] It should be noted that different orders of channel identification in Table 11 do not affect the actually used channels. For example, the channel identification (0,7,1,2) and the channel identification (0,1,2,7) indicate the same actually used channels.

[0399] An embodiment of the present invention provides a channel indication method in a wireless local area network (WLAN). A transmitting station generates and transmits a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier, and the bandwidth identifier is used to indicate the channel for data transmission. In this way, the indication of discontinuous frequency-domain channels in the wireless local area network is satisfied, the available channels for data transmission are increased, and thus the throughput of the system is improved.

[0400] Embodiment 6

[0401] Embodiment 6 of the present invention provides a channel indication method applied to a WLAN. This method can be applied to a station, for example: Figure 2 an AP and STA1-STA3 in, and this station can support the next-generation WLAN standard, for example: the 802.11ax format.

[0402] In this embodiment, the channel for data transmission is indicated by the bandwidth identifier in the PPDU, where the bandwidth (English: BandWidth, abbreviation: BW) identifier includes at least 3 bits.

[0403] The channels for data transmission include the following 8 modes:

[0404] Mode 1: The primary 20 MHz channel;

[0405] Mode 2: The primary 20 MHz and the secondary 20 MHz channels;

[0406] Mode 3: At least one 20 MHz channel among the primary 20 MHz, the secondary 20 MHz channels, and the secondary 40 MHz channels;

[0407] Mode 4: At least including a 20 MHz channel in the primary 20 MHz and the secondary 40 MHz channels that is odd-even different from the primary 20 MHz channel, and not including any 20 MHz channel in the secondary 80 MHz channels.

[0408] Mode 5: The 20 MHz channels in the primary 20 MHz and the secondary 40 MHz channels that are odd-even the same as the primary 20 MHz channel;

[0409] Mode 6: At least including at least one 20 MHz channel among the primary 20 MHz, the secondary 20 MHz channels, and the secondary 80 MHz channels;

[0410] Mode 7: At least including at least one 20 MHz channel among the primary 20 MHz channel, the 20 MHz channels in the secondary 40 MHz channels that are odd-even different from the primary 20 MHz channel, and the secondary 80 MHz channels;

[0411] Mode 8: At least one 20 MHz channel among the primary 20 MHz channel, the 20 MHz channel in the secondary 40 MHz channel that has the same parity as the primary 20 MHz channel, and the 20 MHz channels in the secondary 80 MHz channel;

[0412] The present invention does not limit the correspondence between the bandwidth identifier and the 8 modes. The following correspondence is recommended:

[0413]

[0414] The correspondence between the above 8 modes and the channels is shown in Table 12.

[0415] Table 12

[0416]

[0417]

[0418]

[0419]

[0420] The channel identifiers used in the table are the logical identifiers of the channels. Generally speaking, channel identifier 0 refers to the primary 20 MHz channel, channel identifier 1 refers to the secondary 20 MHz channel, channel identifiers 2 - 3 refer to the secondary 40 MHz channel, and channel identifiers 4 - 7 refer to the secondary 80 MHz channel. The above description is a common mapping relationship between the channel identifier and the channel. There are other mapping relationships between the channel identifier and the channel, and the present invention does not limit this.

[0421] It should be noted that the different orders of the channel identifiers in Table 12 do not affect the actually used channels. For example, the channel identifiers (0, 7, 1, 2) and (0, 1, 2, 7) indicate the same actually used channels.

[0422] In modes 5 and 8, there is only one HE - SIG - B. At this time, this HE - SIG - B contains the RU allocation signaling for all 20M channels. Modes 5 and 8 carry only one piece of information, that is, the length of the HE - SIG - B. In other modes except modes 5 and 8, the common part of HE - SIG - B1 and HE - SIG - B2 contains the RU allocation signaling, which is the same as that in Embodiment 5, and the implementation steps adopted in Embodiment 5. The description of the overlapping situation indicated by the modes in the table is the same as that in Embodiment 5 and will not be elaborated here.

[0423] An embodiment of the present invention provides a channel indication method in a wireless local area network (WLAN). A transmitting station generates and transmits a physical layer protocol data unit (PPDU), where the PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier, and the bandwidth identifier is used to indicate the channel for data transmission. In this way, the indication of the frequency-domain discontinuous channel in the wireless local area network is satisfied, the available channels for data transmission are increased, and thus the throughput of the system is improved.

[0424] Embodiment 7

[0425] Embodiment 7 of the present invention provides a channel indication method applied to a WLAN. This method can be applied to a station, for example: Figure 2 the AP and STA1-STA3 in, and this station can support the next-generation WLAN standard, for example: the 802.11ax format.

[0426] In this embodiment, the channel for data transmission is indicated by the bandwidth identifier of the high-efficiency signaling field (HE-SIG-A) of the preamble field in the PPDU, where the bandwidth (English: BandWidth, abbreviation: BW) identifier includes at least 3 bits.

[0427] The channels for data transmission include the following 8 modes:

[0428] Mode 1: The primary 20 MHz channel;

[0429] Mode 2: The primary 20 MHz and the secondary 20 MHz channels;

[0430] Mode 3: The primary 20 MHz, the secondary 20 MHz channels, and the secondary 40 MHz channel;

[0431] Mode 4: The primary 20 MHz, the secondary 20 MHz channels, the secondary 40 MHz channel, and the secondary 80 MHz channel;

[0432] Mode 5: The 20 MHz channel in the primary 20 MHz channel and the secondary 40 MHz channel that is odd-even different from the primary 20 MHz channel;

[0433] Mode 6: The primary 20 MHz channel and the secondary 40 MHz channel;

[0434] Mode 7: The primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel;

[0435] Mode 8: The primary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel;

[0436] The present invention does not limit the correspondence between the bandwidth identifier and the 8 modes. The following correspondence method is recommended:

[0437]

[0438] Exemplarily, a correspondence between 8 modes and channels is as Figure 25 shown.

[0439] An embodiment of the present invention provides a channel indication method in a wireless local area network (WLAN). A transmitting station generates and transmits a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier, and the bandwidth identifier is used to indicate the channel for data transmission. In this way, the indication of discontinuous channels in the frequency domain for the wireless local area network is satisfied, the available channels for data transmission are increased, and thus the throughput of the system is improved.

[0440] Embodiment 8

[0441] Embodiment 8 of the present invention provides a channel indication method applied to a WLAN. This method can be applied to a station, such as: Figure 2 the AP and STA1-STA3 in, and this station can support the next-generation WLAN standard, such as: the 802.11ax format.

[0442] In this embodiment, the channel for data transmission is indicated by the bandwidth identifier of the high-efficiency signaling field (HE-SIG-A) of the preamble field in the PPDU. The bandwidth (English: BandWidth, abbreviation: BW) identifier includes at least 3 bits.

[0443] The channels for data transmission include the following 8 modes:

[0444] Mode 1: Primary 20 MHz channel;

[0445] Mode 2: Primary 20 MHz and secondary 20 MHz channels;

[0446] Mode 3: Primary 20 MHz, secondary 20 MHz channels, and secondary 40 MHz channels;

[0447] Mode 4: Primary 20 MHz, secondary 20 MHz channels, secondary 40 MHz channels, and secondary 80 MHz channels;

[0448] Mode 5: Primary 20 MHz channel and secondary 40 MHz channels;

[0449] Mode 6: One of the 20 MHz channels among the primary 20 MHz, secondary 20 MHz, and secondary 40 MHz channels;

[0450] It should be noted that Mode 6 includes two implementation manners. The first implementation manner of Mode 6 is the main 20 MHz channel, the secondary 20 MHz channel, and the channel among the secondary 40 MHz channels that has the same parity as the main 20 MHz channel. The second implementation manner of Mode 6 is the main 20 MHz channel, the secondary 20 MHz channel, and the channel among the secondary 40 MHz channels that has a different parity from the main 20 MHz channel.

[0451] Mode 7: the main 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel;

[0452] Mode 8: the main 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel;

[0453] The present invention does not limit the correspondence between the bandwidth identifier and the eight modes. The following correspondence manner is recommended:

[0454]

[0455] Exemplarily, the correspondence between the eight modes and the channels is as Figure 26 or Figure 27 shown.

[0456] An embodiment of the present invention provides a channel indication method in a wireless local area network (WLAN). A transmitting station generates and transmits a physical layer protocol data unit (PPDU). The PPDU includes a preamble field and a data field. The high-efficiency signaling field (HE-SIG-A) of the preamble field contains a bandwidth identifier, and the bandwidth identifier is used to indicate the channel for data transmission. Through the above manner, the indication of frequency-domain discontinuous channels in the wireless local area network is satisfied, the available channels for data transmission are increased, and thus the throughput of the system is improved.

[0457] Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a readable storage medium, such as a floppy disk, a hard disk, or an optical disc of a computer, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

Claims

1. A channel indication method in a wireless local area network (WLAN), characterized in that Comprising: Generating a physical layer protocol data unit (PPDU), the PPDU including a preamble field and a data field, and a high-efficiency signaling field (HE-SIG-A) of the preamble field containing a bandwidth identifier; wherein, the bandwidth identifier includes 3 bits; Wherein, one or more values of the 3 bits are used to indicate a channel for data transmission, and the channel for data transmission is included in a channel with a bandwidth greater than or equal to 80 MHz; each value of one or more values of the 3 bits indicates a mode of a channel for data transmission; Wherein, the 3 bits take a first value, which is used to indicate that the channel for data transmission in a channel with a bandwidth of 80 MHz is in a first mode; The 3 bits take a second value, which is used to indicate that the channel for data transmission in a channel with a bandwidth of 80 MHz is in a second mode; The 3 bits take a third value, which is used to indicate that the channel for data transmission in a channel with a bandwidth greater than 80 MHz is in a third mode; or The 3 bits take a fourth value, which is used to indicate that the channel for data transmission in a channel with a bandwidth greater than 80 MHz is in a fourth mode; The channel for data transmission at least includes: a primary 20 MHz channel and a 20 MHz channel that is odd-even different from the primary 20 MHz channel, and the channel for data transmission does not include another 20 MHz channel in the channel with a bandwidth greater than or equal to 80 MHz; Transmitting the PPDU.

2. The method according to claim 1, wherein In the first mode, the 20 MHz channel that is odd-even different from the primary 20 MHz channel is one of the 20 MHz channels from 40 MHz.

3. The method according to claim 2, wherein In the first mode, the channel for data transmission includes: the primary 20 MHz channel and the 40 MHz secondary channel, and the channel for data transmission does not include any 20 MHz channel in the 80 MHz secondary channel.

4. The method according to claim 3, wherein The first value is 100.

5. The method according to claim 1, wherein In the second mode, the 20 MHz channel that is odd-even different from the primary 20 MHz channel is the 20 MHz secondary channel.

6. The method according to claim 5, wherein In the second mode, the channel for data transmission includes: the primary 20 MHz channel, the 20 MHz secondary channel, and one of the 20 MHz channels from 40 MHz secondary channel, and the channel for data transmission does not include any 20 MHz channel in the 80 MHz secondary channel.

7. The method according to claim 6, characterized in that, The second value is 101.

8. The method according to claim 1, wherein In the third mode, the 20 MHz channel that is odd-even different from the primary 20 MHz channel is one of the 20 MHz channels from 40 MHz.

9. The method according to claim 8, wherein In the third mode, the channel for data transmission includes: the primary 20 MHz, the 40 MHz secondary, and at least one 20 MHz channel from the 80 MHz secondary.

10. The method according to claim 1, wherein In the fourth mode, the 20 MHz channel that is odd-even different from the main 20 MHz channel is the secondary 20 MHz channel.

11. The method according to claim 10, wherein In the fourth mode, the channels for data transmission at least include: at least one 20 MHz channel among the main 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel in the channel.

12. A channel indication device in a wireless local area network (WLAN), characterized in that, Including: A baseband circuit for generating a physical layer protocol data unit (PPDU), the PPDU including a preamble field and a data field, and a high-efficiency signaling field (HE-SIG-A) of the preamble field including a bandwidth identifier; wherein, the bandwidth identifier includes 3 bits; Wherein, one or more values of the 3 bits are used to indicate the channels for data transmission of the PPDU, and the channels for data transmission are included in a channel with a bandwidth greater than or equal to 80 MHz; each value of one or more values of the 3 bits indicates a mode of a channel for data transmission; Wherein when the 3 bits take a first value, it is used to indicate that the channel for data transmission in the 80 MHz channel is in the first mode; The 3 bits take a second value, which is used to indicate that the channel for data transmission in the 80 MHz channel is in the second mode; The 3 bits take a third value, which is used to indicate that the channel for data transmission in a channel with a bandwidth greater than 80 MHz is in the third mode; or The 3 bits take a fourth value, which is used to indicate that the channel for data transmission in a channel with a bandwidth greater than 80 MHz is in the fourth mode; The channels for data transmission at least include: the main 20 MHz channel and a 20 MHz channel that is odd-even different from the main 20 MHz channel, and the channels for data transmission do not include another 20 MHz channel in the channel with a bandwidth greater than or equal to 80 MHz; a radio frequency circuit for transmitting the PPDU.

13. The device according to claim 12, wherein In the first mode, the 20 MHz channel that is odd-even different from the main 20 MHz channel is one of the 20 MHz channels in the secondary 40 MHz.

14. The device according to claim 13, wherein In the first mode, the channels for data transmission include: the main 20 MHz channel and the secondary 40 MHz channel, and the channels for data transmission do not include any 20 MHz channel in the secondary 80 MHz channel.

15. The device according to claim 14, characterized in that, The first value is 100.

16. The device according to claim 12, wherein In the second mode, the 20 MHz channel that is odd-even different from the main 20 MHz channel is the secondary 20 MHz channel.

17. The device according to claim 16, wherein In the second mode, the channels for data transmission include: the main 20 MHz channel, the secondary 20 MHz channel, and one of the 20 MHz channels in the secondary 40 MHz channel, and the channels for data transmission do not include any 20 MHz channel in the secondary 80 MHz channel.

18. The device according to claim 17, wherein The second value is 101.

19. The device according to claim 12, wherein In the third mode, a 20 MHz channel that is odd-even different from the primary 20 MHz channel is one of the 20 MHz channels in the secondary 40 MHz.

20. The apparatus according to claim 19, wherein In the third mode, the channels for data transmission include at least one 20 MHz channel among the primary 20 MHz, the secondary 40 MHz, and the secondary 80 MHz.

21. The apparatus according to claim 12, wherein In the fourth mode, a 20 MHz channel that is odd-even different from the primary 20 MHz channel is a secondary 20 MHz channel.

22. The apparatus according to claim 21, wherein In the fourth mode, the channels for data transmission at least include at least one 20 MHz channel among the primary 20 MHz channel, the secondary 20 MHz channel, and the secondary 80 MHz channel in the channels.

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