WO2017084582A1

WO2017084582A1 - Method and apparatus for channel resource indication

Info

Publication number: WO2017084582A1
Application number: PCT/CN2016/106124
Authority: WO
Inventors: 杜振国; 乔登宇
Original assignee: 华为技术有限公司
Priority date: 2015-11-20
Filing date: 2016-11-16
Publication date: 2017-05-26
Also published as: CN106793096A

Abstract

Disclosed are a method and an apparatus for channel resource indication, the method comprising: a first device sending a channel resource collecting message comprising channel resource indication information, the channel resource indication information being used for indicating a first channel resource; and the first device receiving an available channel resource reporting message sent by a second device by means of a second channel resource, the available channel resource reporting message indicating an idle channel available for the second device; the idle channel available for the second device being determined by the second device from the first channel resource, and the second channel resource being determined by the second device according to the idle channel.

Description

Channel resource indication method and device

The present application claims priority to Chinese Patent Application No. 201510819111.X, filed on Nov. 20, 2015, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present application relates to the field of wireless communications technologies, and in particular, to a channel resource indication method and apparatus.

Background technique

In order to improve transmission efficiency, the UL DMA (Uplink Multiple User) transmission mechanism, including UL OFDMA (Orthogonal Frequency), is introduced in the next-generation WiFi (Wireless Fidelity) standard 802.11ax. Division Multiple Access, OFDM-Multiple Input Multiple Output. For the UL MU transmission, an AP (Access Point) is required to send a trigger frame (Trigger) for resource scheduling. According to the resolution currently discussed, when the STA (Station) receives the trigger frame for triggering the UL MU transmission, if the STA determines that its NAV (Network Allocation Vector) is 0, or determines that its NAV is greater than 0 and the value of the NAV is set according to the frame sent from the device in the BSS (Basic Service Set), and the UL data can be transmitted in response to the received trigger frame, that is, on the resource that triggers the frame scheduling. If the STA determines that its NAV is greater than 0 and the value of the NAV is not set according to the frame transmitted from the device within the BSS, the STA does not respond to the received trigger frame, ie, does not transmit UL data on the resource that triggers the frame scheduling. For one STA, other BSSs other than the associated BSS are also called OBSS (Overlapping BSS).

In a scenario where devices are densely distributed, when an AP schedules STAs within its signal coverage, the NAV of a STA has a high probability of not being set according to frames sent from devices in the BSS, but according to the OBSS. The frames sent by the device, especially those located at the edge of the cell, are more susceptible to devices in the OBSS. At this time, in order to solve the problem, the prior art In the STA, the STA can adopt a per-channel NAV (NAV) mechanism, that is, set a NAV corresponding to the channel for each channel, and the STA can distinguish whether other devices are reserved by different channels through different NAVs, so that the STA It is possible to distinguish whether the corresponding channel is free by each NAV, so that the above mentioned problems can be avoided.

However, even if the per-channel NAV mechanism is adopted, if the AP schedules the STA on the channel whose own NAV is not 0, the STA will not respond to the trigger frame sent by the AP, and will also cause the AP to allocate the UL to the STA. Resources are wasted.

In summary, the STA determines whether to respond to the UL MU scheduling trigger frame sent by the AP according to whether the NAV is set by the frame from the OBSS device, so that the STA may not respond to the scheduled trigger frame when the STA is scheduled, so that the channel resource utilization is utilized. The rate is low.

Summary of the invention

The embodiment of the present application provides a channel resource indication method and device, which are used to improve channel resource utilization.

In a first aspect, the embodiment of the present application provides a channel resource indication method, including:

The first device sends a channel resource collection message including channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

Receiving, by the first device, an available channel resource report message sent by the second device by using a second channel resource, where the available channel resource report message indicates an available idle channel of the second device; The idle channel is determined by the second device from the first channel resource, and the second channel resource is determined by the second device according to the idle channel.

Optionally, the channel resource collection message further includes a device identifier list, where the device identifier list is used to indicate that the second device that is located in the device identifier list by the device identifier sends the available channel according to the channel resource collection message. Resource report message.

Optionally, the device identifier list is further configured to indicate that the second device determines, according to an order in which the device identifier of the second device is located in the device identifier list, corresponding to the second device. a third channel resource, the second channel resource being a subset of the third channel resource.

Optionally, the channel resource collection message further includes channel resource mapping indication information;

The channel resource mapping indication information is used to indicate a third channel resource corresponding to the second device, and the second channel resource is a subset of the third channel resource.

Optionally, the available channel resource report message indicates the available idle channel of the second device, including:

The available channel resource report message indicates, by using a list of idle channels in the available channel resource report message, an idle channel available to the second device; or

The available channel resource report message indicates a free channel available to the second device by using a channel corresponding to the second channel resource that carries the available channel resource report message.

Optionally, the idle channel list is a list of channel identifiers including idle channels available to the second device; or

The idle channel list is a channel state bit bitmap, and the channel resource status bit bitmap is used to characterize a channel state of each channel included in the first channel resource, where the channel state is idle or busy.

Optionally, the available channel resource report message further includes cache state information, where the cache state information indicates a data amount of data that the second device needs to transmit.

Optionally, the second channel resource is a frequency domain resource, or a time-frequency domain resource, or a frequency-code domain resource; the third channel resource is a frequency domain resource, or a time-frequency domain resource, or a frequency-code domain. Resource

The first channel resource is a frequency domain resource.

Optionally, the idle channel available to the second device is a channel that meets one of the following conditions:

The network allocation vector NAV of the second device is a channel corresponding to 0; or

Determining, by the second device, a channel determined to be idle by the CCA according to the idle channel; or

The NAV of the second device is a channel corresponding to 0 and is determined to be an idle channel according to the CCA.

In a second aspect, the embodiment of the present application provides a channel resource indication method, where the method includes:

The second device receives, by the first device, a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

Determining, by the second device, an idle channel available to the second device from the first channel resource, and determining a second channel resource according to the available idle channel of the second device;

The second device sends the available channel resource report message to the first device by using the second channel resource, where the available channel resource report message indicates an idle channel available to the second device.

Optionally, the channel resource collection message further includes a device identifier list or channel resource mapping indication information;

The device identifier list is used to indicate that the second device determines a third channel resource corresponding to the second device according to an order in which the device identifier of the second device is located in the device identifier list;

The channel resource mapping indication information is used to indicate a third channel resource corresponding to the second device.

Optionally, the determining, according to the available idle channel of the second device, the second channel resource for sending the available channel resource report message, including:

Determining, by the second device, a third channel resource corresponding to the second device according to the device identifier list or the channel resource mapping indication information;

Determining, by the second device, at least one frequency domain resource corresponding to the third channel resource from the available idle channels of the second device;

Determining, by the second device, a second channel resource for transmitting an available channel resource report message from the third channel resource according to the at least one frequency domain resource corresponding to the third channel resource.

Optionally, before the determining, by the second device, the idle channel that is available to the second device, the second device further includes:

The second device determines that the device identifier of the second device is located in the device identifier list.

The second device randomly selects at least one frequency domain resource from the available idle channels of the second device, and determines a second channel resource for sending the available channel resource report message according to the at least one frequency domain resource.

The first channel resource is a frequency domain resource.

Optionally, the idle channel available to the second device is one of the following conditions: Channel:

In a third aspect, an embodiment of the present application provides a channel resource indication device, where the device includes:

a sending unit, configured to send a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

a receiving unit, configured to receive an available channel resource report message sent by the second device by using a second channel resource, where the available channel resource report message indicates an available idle channel of the second device; the second device is available The idle channel is determined by the second device from the first channel resource, and the second channel resource is determined by the second device according to the idle channel.

Optionally, the device identifier list is further configured to: instruct the second device to determine, according to an order in which the device identifier of the second device is located in the device identifier list, a third channel resource corresponding to the second device, The second channel resource is a subset of the third channel resource.

Optionally, the sending unit is specifically configured to:

Optionally, the idle channel list is a letter including an idle channel available to the second device. a list of road signs; or,

The first channel resource is a frequency domain resource.

In a fourth aspect, the embodiment of the present application provides a channel resource indication device, where the device includes:

a receiving unit, configured to receive, by the first device, a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

a determining unit, configured to determine, from the first channel resource, a free channel available to the second device, and determine a second channel resource according to the available idle channel of the second device;

And a sending unit, configured to send, by using the second channel resource, the available channel resource report message to the first device, where the available channel resource report message indicates an available idle channel of the second device.

Optionally, the channel resource collection message further includes a device identifier list, or a channel resource. Source mapping indication information;

Optionally, the determining unit is specifically configured to:

Determining, according to the device identifier list or the channel resource mapping indication information, a third channel resource corresponding to the second device;

Determining at least one frequency domain resource corresponding to the third channel resource from the available idle channels of the second device;

Determining, according to the at least one frequency domain resource corresponding to the third channel resource, a second channel resource for transmitting an available channel resource report message from the third channel resource.

Optionally, the determining unit is further configured to:

Determining that the device identifier of the second device is located in the device identifier list.

Optionally, the determining unit is specifically configured to:

And selecting at least one frequency domain resource from the available idle channels of the second device, and determining, according to the at least one frequency domain resource, a second channel resource for sending the available channel resource report message.

Optionally, the receiving unit is specifically configured to:

The first channel resource is a frequency domain resource.

In a fifth aspect, the embodiment of the present application provides a channel resource indication device, where the device includes:

a transceiver, configured to send a channel resource collection message including channel resource indication information, where the channel resource indication information is used to indicate a first channel resource, and to receive an available channel resource report sent by the second device by using a second channel resource a message, the available channel resource report message indicating an idle channel available to the second device; the available idle channel of the second device is determined by the second device from the first channel resource, The two channel resources are determined by the second device according to the idle channel.

Optionally, the transceiver is specifically configured to:

The first channel resource is a frequency domain resource.

In a sixth aspect, the embodiment of the present application provides a channel resource indication device, where the device includes:

a transceiver, configured to receive a channel resource collection message that is sent by the first device, including channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

a processor, configured to determine, from the first channel resource, an idle channel available to the second device, and determine a second channel resource according to the available idle channel of the second device;

The transceiver is configured to send, by using the second channel resource, the available channel resource report message to the first device, where the available channel resource report message indicates an idle channel available to the second device.

Optionally, the processor is specifically configured to:

Optionally, the processor is further configured to:

Optionally, the processor is specifically configured to:

Selecting at least one frequency domain resource randomly from the available idle channels of the second device, and rooting Determining, according to the at least one frequency domain resource, a second channel resource for transmitting the available channel resource report message.

Optionally, the processor is specifically configured to:

The first channel resource is a frequency domain resource.

The first device indicates, by using the sent channel resource collection message, that the second device reports the available idle channel, so that when the second device performs uplink scheduling, the second device is scheduled to be available on the available idle channel, which can effectively improve. Channel utilization avoids scheduling the second device in the busy channel without determining the idle channel available to the second device, so that the second device has no The method responds to the scheduling of the first device. At the same time, the collection process of the available channel of the second device proposed by the present application itself does not cause additional interference to the OBSS.

DRAWINGS

FIG. 1 is a schematic diagram of a system of a typical WLAN deployment scenario;

2 is a schematic diagram of another typical WLAN deployment scenario;

FIG. 3 is a schematic diagram of time-frequency resource allocation in an OFDMA transmission mode according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of scene resource allocation of OFDMA and MU-MIMO hybrid transmission according to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of a channel resource indication method according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a channel resource collection message transmission according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a channel resource collection message transmission according to an embodiment of the present application;

FIG. 8 is a schematic diagram of channel resource indication according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of scheduling a second device to send NDP Sounding according to an embodiment of the present disclosure;

FIG. 10 is a schematic flowchart of a channel resource indication method according to an embodiment of the present disclosure;

FIG. 11 is a schematic flowchart of a channel resource indication method according to an embodiment of the present disclosure;

FIG. 12 is a schematic flowchart of a channel resource indication method according to an embodiment of the present disclosure;

FIG. 13 is a schematic flowchart of a channel resource indication method according to an embodiment of the present disclosure;

FIG. 14 is a schematic flowchart of a channel resource indication method according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram of a channel resource indication apparatus according to an embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of a channel resource indication apparatus according to an embodiment of the present disclosure;

FIG. 17 is a schematic structural diagram of a channel resource indication apparatus according to an embodiment of the present disclosure;

FIG. 18 is a schematic structural diagram of a channel resource indication apparatus according to an embodiment of the present disclosure.

detailed description

The embodiments of the present application are described in detail below with reference to the accompanying drawings.

The embodiment of the present application can be applied to a Wireless Local Area Network (WLAN). Currently, the standard adopted by the WLAN is the IEEE 802.11 series. A WLAN may include one or more basic service sets, and network nodes in a basic service set include an AP and an STA. Each basic service set may contain one AP and multiple STAs associated with the AP.

APs, also known as access points or hotspots. The AP is an access point for mobile users to enter the wired network. It is mainly deployed in the home, inside the building, and inside the campus. The typical coverage radius is tens 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 the wireless network clients together and then connect the wireless network to the Ethernet. Specifically, the AP may be a terminal device or a network device with a WiFi chip. Optionally, the AP may support the 802.11ax protocol. Further optionally, the AP may be a device supporting multiple WLAN protocols such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a. In general, devices that support a certain protocol are also compatible with legacy protocols that operate in the same frequency band. For example, 802.11n devices operating in the 2.4 GHz band are generally compatible with 802.11b and 802.11g, and 802.11n devices operating in the 5 GHz band are generally compatible with 802.11a. The device is "compatible" with a protocol in which the device supports the protocol.

The STA may be a wireless communication chip, a wireless sensor, or a wireless communication terminal. For example: mobile phone supporting WiFi communication function, tablet computer supporting WiFi communication function, set-top box supporting WiFi communication function, smart TV supporting WiFi communication function, smart wearable device supporting WiFi communication function, and vehicle communication supporting WiFi communication function Devices and computers that support WiFi communication. Optionally, the site can support the 802.11ax protocol. Further optionally, the site supports multiple WLAN protocols such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

Figure 1 is a schematic diagram of a typical WLAN deployment scenario. Figure 1 includes an AP and three STAs. The AP communicates with STA1, STA2, and STA3 to form a BSS.

In a WLAN deployment scenario, there may be cases where multiple BSSs coexist. as shown in picture 2, A schematic diagram of the system for another typical WLAN deployment scenario. In the scenario shown in Figure 2, AP1, STA1, and STA5 are in the same BSS; AP2, STA2, STA3, and STA4 are in the same BSS. It is assumed that AP1 schedules STA1 to perform DL (Downlink) OFDMA on channel CH2, and schedules STA5 to perform DL OFDMA transmission on channel CH1, and first passes MU-RTS (Request To Send)/CTS before data transmission. The (Clear To Send) mechanism protects the downstream transmission. Thus, STA2 can receive the CTS frame from STA1 and set the NAV according to the CTS frame from STA1. During the data transmission between AP1 and STA1, STA2 receives the trigger frame sent by AP2 for UL MU scheduling, and schedules STA2 to perform UL transmission on CH1. According to the foregoing description, since the NAV of STA2 is set according to the device STA1 from the OBSS, whether the STA2 responds to the trigger frame sent by the AP2 should consider whether its own NAV is 0. If STA2 determines that its NAV is greater than 0, STA2 does not. Respond to the trigger frame sent by AP2. This causes the UL resources allocated by AP2 to STA2 to be wasted. However, in reality, since STA1 and STA2 are scheduled on different channels, they can transmit at the same time without interfering with each other.

If AP2 in FIG. 1 schedules STA2 on CH2, STA2 does not respond to the trigger frame sent by AP2 if it determines that its own NAV corresponding to CH2 is not 0, and also causes the UL resource allocated by AP2 to STA2 to be wasted.

For the above problem, the embodiment of the present application provides a channel resource indication method and device thereof for improving channel resource utilization, which will be described in detail below.

In the existing WLAN system, the transmitting node uses OFDM technology to transmit data in the entire frequency domain of the RRC channel. In order to greatly improve the service transmission rate of the WLAN system, the 802.11ax standard will be further based on the existing OFDM technology. Adopt OFDMA technology. The OFDMA technology divides the air interface radio channel resource into a plurality of orthogonal time-frequency resource units (RUs), and the RUs are shared in time and orthogonal in the frequency domain. In the standard under discussion, it is proposed to divide a radio resource channel with a bandwidth of 20 MHz into a maximum of nine orthogonal RUs. The AP may allocate channel resources orthogonal to each other for different STAs at the same time, so that multiple STAs can mutually Receive or transmit data without interference, improving the flexibility and utilization of channel usage. Specifically, as shown in FIG. 3, a schematic diagram of time-frequency resource allocation of an OFDMA transmission mode provided by an embodiment of the present application. In FIG. 3, nine orthogonal RUs are divided on the radio channel resources, which are the first RU (#1RU), the second RU (#2RU), and the ninth RU (#9RU). When transmitting data, the transmitting node uses OFDM to transmit common data in the entire frequency domain of the radio channel resource: a traditional preamble and a HE (high efficient) preamble, by using the OFDMA transmission mode on each RU of the radio channel resource division. Different data units can be transmitted.

Further, in combination with the MU-MIMO technology, the AP may send data to multiple STAs through multiple spatial streams on the same channel resource, or receive data sent from multiple STAs on different spatial streams, thereby implementing multi-user data. Parallel transmission improves the concurrency of data transmission. Up to 8 spatial streams are supported in the standard under discussion.

In the WLAN system, both OFDMA and MU-MIMO transmission modes can exist simultaneously, that is, mixed transmission between OFDMA and MU-MIMO. On different subchannels or RUs of the OFDMA partition, the AP schedules one or more STAs in different subchannels or RUs, that is, the AP schedules one STA to perform OFDMA transmission on a certain subchannel or RU, or schedule multiple STAs. Perform MU-MIMO transmission on a certain subchannel or RU.

The embodiments of the present application are applicable to scenarios of OFDMA, MU-MIMO, and mixed transmission of OFDMA and MU-MIMO. FIG. 4 is a schematic diagram of scene resource allocation for OFDMA and MU-MIMO hybrid transmission according to an embodiment of the present application. As shown in FIG. 4, the OFDMA technology is applied to divide the entire channel resource into N RUs that do not overlap each other in the frequency domain. Applying MU-MIMO technology, each RU of the N RUs is assigned one user equipment or a group of user equipment groups. When only one user equipment is allocated to the RU, the transmission mode of the RU is a Single User (SU) transmission mode, including two possible scenarios, OFDMA and SU-MIMO; when at least two users are allocated on the RU. In the case of the device, the transmission mode of the RU is a Multiple User (MU) transmission mode, including MU-MIMO, and includes Time Reuse. Time reuse, that is, multiple STAs are transmitted in the same subchannel or RU in a time division manner. The method is under discussion and has not yet been adopted by the standard. Therefore, in the present invention, MU transmission is described by taking MU-MIMO as an example.

As shown in FIG. 4, the user equipment is used as an example for the STA. In FIG. 4, the entire channel resource is divided into N RUs that do not overlap each other in the frequency domain, which are respectively the first RU (#1RU) and the second. RU (#2RU)... The Nth RU (#N RU). On the first RU (#1RU), a group of user equipments is allocated. The user equipment group includes four user equipments: STA1, STA3, STA6, and STA8. Among them, STA1 is the first MU transmission mode. STA (#1MU STA), STA3 is the STA of the second MU transmission mode (#2MU STA), STA6 is the STA of the third MU transmission mode (#3MU STA), and STA8 is the STA of the fourth MU transmission mode. (#4MU STA). Similarly, a user equipment STA2 is allocated on the second RU (#2RU). A user equipment group is allocated on the Nth RU (#N RU), and the user equipment group includes three user equipments, which are STA5, STA4, and STA7.

In this embodiment, the first device may be an AP, and the second device may be an STA.

When the first device is an AP, the first device may be a wireless terminal or a wired terminal, and may be, for example, a router, a computer, or the like. It should be specially noted that a WiFi device with a central scheduling function should be regarded as an AP, for example, a terminal device with a hotspot function enabled, and a device that plays the role of a Group Owner (GO) in WiFi Direct transmission.

When the second device is a STA, the second device may be a wireless terminal or a wired terminal, and may be, for example, a mobile phone, a computer, a tablet computer, a personal digital assistant (abbreviation: PDA), or a mobile internet device ( English: mobile Internet device, abbreviation: MID), wearable device and e-book reader (English: e-book reader).

Based on the above discussion, as shown in FIG. 5, it is a schematic flowchart of a channel resource indication method provided by an embodiment of the present application.

Referring to Figure 5, the method includes:

Step 501: The first device sends a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource.

Step 601: The second device receives, by the first device, a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource.

In step 501, the first device may send, by using a broadcast, a channel resource collection message including channel resource indication information, where the channel resource collection message is used to trigger the second device to feed back an available channel in the first channel resource.

In this embodiment, the channel resource indication information may be used to indicate that the second device determines the available idle channel from the first channel resource indicated by the channel resource indication information. Correspondingly, after receiving the channel resource collection message, the second device determines, from the first channel resource, a usable idle channel.

The first channel resource may refer to a frequency domain resource. For example, the first channel resource may be a frequency domain resource set composed of multiple channels. The channel resource indication information may be a selectable channel list including a plurality of channel identifiers, thereby indicating a first channel resource, where the first channel resource is a set of frequency domain resources of all channels in the selectable channel list.

For example, the channel resource indication information indicates channel 1, channel 2, and channel 5. In this case, the frequency domain resource corresponding to channel 1, the frequency domain resource corresponding to channel 2, and the frequency domain resource corresponding to channel 5 may be used as the first One channel resource.

The channel resource indication information may also be indicated in a bandwidth manner, for example, indicated by 2 bits, 00 represents 20 MHz, 01 represents 40 MHz, 10 represents 80 MHz, and 11 represents 160/80 + 80 MHz. Among them, 80+80MHz represents two discontinuous 80MHz channels. The channel resources indicated by this method are typically channels including the primary channel.

The channel resource indication information can also be indicated by a bitmap (Bitmap). For example, each bit in the bitmap corresponds to a 20 MHz bandwidth, and a value of 1 indicates that the corresponding 20 MHz channel is used, and a value of 0 indicates that the corresponding 20 MHz channel is not used. Assuming that the AP supports an 80 MHz channel, a 4-bit bitmap is used, and a set of 20 MHz channels corresponding to all 1 bits in the bitmap can be used as the first channel resource.

It should be noted that, in the embodiment of the present application, the channel may refer to the IEEE 802.11 series standard. The channel defined by any of the standards.

The channel resource collection message sent by the first device may further include a device identifier list, where the device identifier list is used to indicate that the second device that is located in the device identifier list by the device identifier sends an available channel resource report according to the channel resource collection message. Message. The device identifier may be a MAC (Media Access Control) address of the second device, or may be an AID (Association Identifier) of the second device, or may be a PAID (Partial AID) of the second device. , part of the association identifier), or any other information that can uniquely identify the identity of the STA.

For example, after determining the buffer status of the second device, the first device needs to perform scheduling UL MU transmission on the second device, where the buffer status information indicates that the second device needs to be transmitted. Information about the amount of data of the data, or time information required by the second device to transmit the data. Since the second device has determined the second device that needs to transmit data before the first device performs the UL MU transmission on the second device, the first device may only need to determine the idle channel available to the second device that needs to transmit data, and the first time The channel resource collection message sent by the device may include a device identifier list, where the device identifier list includes all or part of the device identifier of the second device that needs to send data.

The first device may determine, by using a channel resource collection message that includes a device identifier list, the idle channel available to the second device that needs to send data, so that the first device determines the available channel of the second device more specifically. The second device that does not need to send data is responsive to the first device, thereby improving channel utilization.

In step 501, the first device may further indicate, by using the sent channel resource collection message, the third channel resource corresponding to the second device, to prevent the second channel resource selected by the second device from colliding, and improve channel utilization. rate. The third channel resource may be a frequency domain resource, and may be a time-frequency domain resource, and may also be a frequency-code domain resource; the second channel resource may be a frequency domain resource, and may be a time-frequency domain resource. It can also be a frequency-code domain resource. The second channel resource is a subset of the third channel resource.

In the embodiment of the present application, one frequency domain resource may be one RU; one time-frequency domain resource may be a combination of one RU and one time segment; and one frequency-code domain resource may be a combination of one RU and one orthogonal sequence.

When the third channel resource or the second channel resource is a frequency domain resource, the third channel resource or the second channel resource may be a time-frequency domain resource. And a set comprising a combination of a plurality of RUs and a time period; and the third channel resource or the second channel resource is a frequency-code domain resource, and may be a set including a combination of multiple RUs and orthogonal sequences.

In the embodiment of the present invention, the elements in the channel resource set may be located in different dimensions, such as a frequency domain, a time-frequency domain, and a frequency-code domain, and their common dimensions are frequency domains. Therefore, in all embodiments of the present invention, the concept of "subset" and intersection between different channel resources is from the frequency domain. For example, the time-frequency domain resource ignores the time domain information and only retains the frequency domain information, and the frequency-code domain resource ignores the code domain information and only retains the frequency domain information. Therefore, the above-mentioned "second channel resource is a subset of the third channel resource" indicates that the actual meaning is that "the second channel resource is a subset of the third channel resource from the frequency domain".

The first device may indicate the third channel resource corresponding to the second device by using the channel resource mapping indication information, or may indicate the third channel resource corresponding to the second device by using the device identifier list.

When the first device indicates the third channel resource corresponding to the second device by using the channel resource mapping indication information, the channel resource mapping indication information includes the correspondence between the second device and the third channel resource corresponding to the second device, Thereby, the second device determines a correspondence relationship of the third channel resources corresponding to the second device.

For example, the order of the device identifiers in the device identifier list sent by the first device is device identifier 1, device identifier 2, and device identifier 3. At this time, the first device indicates that the device identifier 1 corresponds to the RU1 in each channel through the channel resource mapping indication information, and indicates that the device identifier 2 corresponds to the RU2 in each channel, and the indication device identifier 3 corresponds to the RU3 in each channel. .

It should be noted that the channel resource mapping indication information may indicate the same third channel resource for two device identifiers.

The channel resource mapping indication information may be sent to the second device through the channel resource collection message, or may be separately sent to the second device, for example, sent by the Beacon frame, or sent through a separate interactive message, which is not limited by the embodiment of the present application.

When the first device indicates the third channel resource corresponding to the second device by using the device identifier list, the second device may be instructed to determine, according to an order in which the device identifier of the second device is located in the device identifier list. a third channel resource corresponding to the second device. The correspondence between the order in which the device identifiers are located in the device identification list and the third channel resources may be pre-agreed or pre-defined by standards.

If the third channel resource is a frequency domain resource including multiple RUs. The device identifier list indicates that the device identifier of the Nth bit in the device identifier list may correspond to the MR of the Mth bit in each channel included in the first channel resource, and both N and M are positive integers.

For example, the first device indicates, by using the channel resource indication information, that the first channel resource is channel 1, channel 2, and each channel includes four RUs, which are respectively RU1, RU2, RU3, and RU4. The second device that the first device needs to determine the available idle channel is SAT1 (whose device identifier is device identifier 1), SAT2 (whose device identifier is device identifier 2), and SAT3 (its device identifier is device identifier 3). The order of the device identifiers in the device identifier list sent by the first device is device identifier 1, device identifier 2, and device identifier 3. At this time, the device identifier 1 may correspond to the RU1 in each channel, the device identifier 2 may correspond to the RU2 in each channel, and the device identifier 3 may correspond to the RU3 in each channel. The third channel resource corresponding to SAT1 is a set of RU1 in each channel, that is, {RU1 in channel 1, RU1 in channel 2}; the third channel resource corresponding to SAT2 is a set of RU2 in each channel, that is, { RU2 in channel 1, RU2 in channel 2}; the third channel resource corresponding to SAT3 is the set of RU3 in each channel, ie {RU3 in channel 1, RU3 in channel 2}.

In the above example, the correspondence between the device identifier and the RU may also be: the device identifier 1 may be Corresponding to RU2 in each channel, device identification 2 may correspond to RU3 in each channel, and device identification 3 may correspond to RU4 in each channel. The third channel resource corresponding to SAT1 is a set of RU2 in each channel, that is, {RU2 in channel 1, RU2 in channel 2}; the third channel resource corresponding to SAT2 is a set of RU3 in each channel, that is, { RU3 in channel 1, RU3} in channel 2; the third channel resource corresponding to SAT3 is the set of RU4 in each channel, ie {RU4 in channel 1, RU4 in channel 2}.

It should be noted that the multiple device identifiers may correspond to the same RU in the channel, that is, the device identifier located in the device identifier list and the device identifier in the device identifier list may be the same as the device identifier in the device identifier list. The RU of the Mth bit in each channel included in one channel resource corresponds, and Q is a positive integer. The above solution can generally be implemented in a scenario where the number of second devices is greater than the number of RUs included in each channel.

Of course, if the number of the second devices is greater than the number of RUs included in each channel, in order to avoid resource collision, the first device may send multiple channel resource collection messages including the device list identifier to determine that all the second devices are available. The number of device identifiers included in the device list identifier that is sent each time may be less than or equal to the number of RUs included in each channel, and may of course be greater than the number of RUs included in each channel.

Optionally, if the number of the second devices is greater than the number of RUs included in each channel, the first device may divide the second devices that need to collect the available idle channels into K groups, and the number of the second devices in each group is not The number of RUs included in each channel is exceeded, and then all the available channels of the second device are determined by transmitting K channel resource collection messages including the device list identifier, and each channel resource collection message corresponds to a group of second devices. Where K ≥ 2 and K is an integer.

For example, the first device indicates, by using the channel resource indication information, that the first channel resource is channel 1, channel 2, channel 3, and channel 4. Each channel includes four RUs, which are respectively RU1, RU2, RU3, and RU4. The second device that needs to determine the available idle channel is SAT1 (its device identifier is device identifier 1), SAT2 (its device identifier is device identifier 2), SAT3 (its device identifier is device identifier 3), SAT4 ( Its equipment identification is equipment identification 4), SAT5 (its equipment Identifies the device ID 5). The first device may send two channel resource collection messages including the device list identifier to determine all available idle channels of the second device. The order of the device identifiers in the device identifier list sent by the first device may be device identifier 1, device identifier 2, and device identifier 3. At this time, the device identifier 1 may correspond to the RU1 in each channel, the device identifier 2 may correspond to the RU2 in each channel, and the device identifier 3 may correspond to the RU3 in each channel. SAT1, SAT2, and SAT3 respectively send an available channel resource report message to the first device in their respective corresponding RUs. If channel 1 and channel 2 are available idle channels for SAT1, SAT2, SAT3, SAT1 may send an available channel resource report message on RU1 in at least one channel; SAT2 may send on RU2 in at least one channel The available channel resource report message; SAT3 may send an available channel resource report message on RU3 in at least one channel. Specifically, as shown in FIG. 6 , it is a schematic diagram of a channel resource collection message transmission provided by an embodiment of the present application. SAT1 may send an available channel resource report message on RU1 in each channel; SAT2 may send an available channel resource report message on RU2 in each channel; SAT3 may send an available channel resource report message on RU3 in each channel . The order of the device identifiers in the device identifier list sent by the first device for the second time may be the device identifier 4 and the device identifier 5. At this time, the device identification 4 may correspond to the RU3 in each channel, and the device identification 5 may correspond to the RU4 in each channel. If channel 3, channel 4 are available idle channels for SAT4, SAT5, SAT4 may send an available channel resource report message on RU3 in at least one channel; SAT5 may send an available channel on RU4 in at least one channel Resource report message. Specifically, as shown in FIG. 6, SAT4 may transmit an available channel resource report message on RU3 in channel 3; SAT5 may send an available channel resource report message on RU4 in channel 4.

Optionally, if the number of the second devices is greater than the number of the RUs included in each channel, the first device may also send only one channel resource collection message including the device list identifier to determine the available idle channels of all the second devices. The device list identifier sent by the first device includes an identifier of the second device that all the first devices need to determine an available idle channel.

At this time, the third channel resource is a time-frequency domain resource including a plurality of RUs and multiple time segments. The device identifier list indicates that the device identifier of the Nth bit located in the device identifier list may correspond to the MR of the Mth bit of each channel included in the first channel resource. The first device may indicate that the device identifier of the Nth bit in the device identifier list may correspond to the Tth time period by using the device identifier list, or the first device may directly indicate that the device identifier list is located. The device identifier of the Nth bit may correspond to the Tth time period, thereby indicating that the second device corresponding to the Tth time period may send an available channel resource report message in the Tth time period, where T is a positive integer. For example, N and M can satisfy the following relationship: M=N%A, where A is the number of RUs included in each channel, and % is a remainder operation.

For example, N and T can satisfy the following relationships:

among them

Round up the operation. For example, each channel includes four RUs, and the device identifier list has five device identifiers, which are respectively: device identifier 1, device identifier 2, device identifier 3, device identifier 4, and device identifier 5. Then, the time domain resource corresponding to the device identifier 1 for sending the available channel resource report message is:

That is, the second device corresponding to the device identifier 1 may send the available channel resource report message in the first time period; the time domain resource corresponding to the device identifier 5 that sends the available channel resource report message is:

That is, the second device corresponding to the device identifier 5 can send an available channel resource report message in the second time period.

For example, in conjunction with the description of FIG. 7, the first device may also send the channel resource collection message including the device list identifier only once, and the device identifier that is sent for the first time includes all the second devices that need to determine the available idle channel. The device identification sequence is device identifier 1, device identifier 2, device identifier 3, device identifier 4, and device identifier 5. The first device directly indicates that the device identifier 1, the device identifier 2, and the device identifier 3 correspond to the first time period T1, and the device identifier 4 and the device identifier 5 correspond to the second time period T2. The device identifier 1 may correspond to the RU1 in each channel and correspond to the first time period T1; the device identifier 2 may correspond to the RU2 in each channel, corresponding to the first time period T1; the device identifier 3 may be associated with each channel Corresponding to the RU3 corresponding to the first time period T1; the device identifier 4 may correspond to the RU4 in each channel and correspond to the second time period T2; the device identifier 5 may correspond to the RU1 in each channel, and the second The time period T2 corresponds. If channel 1 and channel 2 are available idle channels for SAT1, SAT2, and SAT3, if channel 3 and channel 4 are available idle channels for SAT4 and SAT5. FIG. 7 is a schematic diagram of a channel resource collection message transmission according to an embodiment of the present application. In the first time period T1, SAT1 may send an available channel resource report message on RU1 in each channel; SAT2 may send an available channel resource report message on RU2 in each channel; SAT3 may be in each channel of RU3 The available channel resource report message is sent. In the second time period T2, SAT4 may send an available channel resource report message on RU3 in channel 3; SAT5 may send an available channel resource report message on RU4 in channel 4.

The third channel resource is a frequency-code domain resource including a plurality of RUs and a plurality of orthogonal sequences. The device identifier list indicates that the device identifier of the Nth bit in the device identifier list may correspond to the MR of the Mth bit in each channel included in the first channel resource, and is located in the device identifier list. The device identification of the bit may correspond to the Kth orthogonal sequence, ie N→(M,K), where K is a positive integer.

For example, the first device indicates, by using the channel resource indication information, that the first channel resource is channel 1, channel 2, and each channel includes four RUs, which are respectively RU1, RU2, RU3, and RU4. At the same time, four orthogonal sequences are used in each RU, which are respectively P1, P2, P3, and P4. The second device that the first device needs to determine the available idle channel is SAT1 (whose device identifier is device identifier 1), SAT2 (whose device identifier is device identifier 2), and SAT3 (its device identifier is device identifier 3). The order of the device identifiers in the device identifier list sent by the first device is device identifier 1, device identifier 2, and device identifier 3. The device identifier 1 may correspond to the RU2 in each channel, and correspond to the orthogonal sequence P1, that is, the device identifier 1→(RU2, P1); the device identifier 2 may correspond to the RU3 in each channel, and correspond to the orthogonal sequence P2. That is, the device identifier 2→(RU3, P2); the device identifier 3 may correspond to the RU4 in each channel and correspond to the orthogonal sequence P3, that is, the device identifier 3→(RU4, P3). The third channel resource corresponding to SAT1 is a set of frequency-code domain resources indicated by (RU2, P1) in each channel; the third channel resource corresponding to SAT2 is indicated by (RU3, P2) in each channel. a set of frequency-code domain resources; the third channel resource corresponding to SAT3 is in each channel A set of frequency-code domain resources indicated by (RU4, P3).

Correspondingly, in step 601, the second device can listen to the channel resource collection message broadcast by the first device.

Step 602: The second device determines, from the first channel resource, an idle channel that is available to the second device, and determines a second channel resource according to the available idle channel of the second device.

In step 602, the idle channel available to the second device may be a channel that satisfies one of the following conditions:

Determining, by the second device, a channel that is idle according to a CCA (Clear Channel Assessment); or

The CCA refers to the second device that listens to the channel. If the signal power on the channel is greater than the preset threshold, the channel state of the channel is determined to be busy; otherwise, the channel state of the channel is determined to be idle ( Idle).

It should be noted that the definition of the idle channel may end up being one of the above three conditions, and two or more of the conditions are not used at the same time. For example, the standard may dictate that both the CCA and the NAV be considered when determining the idle channel, ie, the third condition is used. Therefore, "satisfying one of the following conditions" means satisfying the condition specified by the standard, and not saying that any of the three conditions is considered to be an idle channel.

It should be noted that, in step 601, if the device identifier list is not included in the channel resource collection message received by the second device, the second device may directly perform step 602; if the channel resource collection message received by the second device is included, a device identifier list, after receiving the channel resource collection message that is sent by the first device, including the device identifier list, if the device identifier of the second device is determined to be in the device identifier list, the second device is configured to collect the message according to the channel resource. The first channel resource in the determining the idle channel available to the second device; if the second device determines that the device identifier of the second device is not in the device identifier list, the channel sent by the first device may be ignored Resource collection message.

The second device may determine the second channel resource for sending the available channel resource report message according to the available idle channel of the second device, where a possible implementation manner is: the second device is from the second device At least one frequency domain resource is randomly selected from the available idle channels, and a second channel resource for transmitting the available channel resource report message is determined according to the at least one frequency domain resource.

For example, the second channel resource is a frequency domain resource. FIG. 8 is a schematic diagram of channel resource indication provided by an embodiment of the present application. In FIG. 8, the first device indicates, by using the channel resource indication information, that the first channel resource is channel 1, channel 2, channel 3, and channel 4, and each channel includes four RUs, which are respectively RU1, RU2, RU3, and RU4. The second device determines that channel 1 and channel 3 are available idle channels. At this time, a total of 8 RUs are available for selection by the second device, and the second device may randomly select at least one RU from channel 1 and channel 3, and determine the at least one RU as the second channel resource. For example, the second device selects RU2 in channel 1 as the second channel resource.

Optionally, the second device randomly selects one frequency domain resource from the idle channels available to the second device.

For example, the second channel resource is a frequency domain resource. The second device randomly selects one RU from the available idle channels of the second device, and determines the RU as the second channel resource.

It should be noted that the second device may randomly select at least one frequency domain resource from the idle channels available to the second device by using any one of the following manners.

Method 1: Frequency domain backoff method: The second device randomly selects a backoff initial value A within a certain range, and selects the first A according to the order of the frequencies of the RUs in the available idle channels from high to low (or from low to high). And determining, according to the Ath RU, a second channel resource for transmitting the available channel resource report message.

Method 2: The p-probability method: after receiving the channel resource collection message, the second device determines, by using the probability p, the response to the channel resource collection message, and the probability 1-p does not respond to the channel resource collection message. If the message is collected in response to the channel resource, the second channel resource is determined according to mode 1. among them, The value of the probability p may have different methods, such as being predefined in the 802.11 standard, or determined according to the received channel resource collection message, and the like.

Mode 3: Time domain backoff method: The second device randomly selects a backoff initial value B within a certain range, and then receives the backoff initial value B minus 1 every time a channel resource collection message is received, when the backoff initial value B is 0. The second channel resource is determined by mode one or mode two.

Another possible implementation manner is: the second device determines, according to the device identifier list or the channel resource mapping indication information, a third channel resource that is corresponding to the second device; Determining at least one frequency domain resource corresponding to the third channel resource in the available idle channel of the second device; the second device according to the at least one frequency domain resource corresponding to the third channel resource A second channel resource for transmitting an available channel resource report message is determined among the three channel resources.

If the second channel resource and the third channel resource are both frequency domain resources. Determining, by the second device, a third channel resource corresponding to the second device according to the device identifier list or the channel resource mapping indication information; the second device determining from an available idle channel of the second device And at least one RU corresponding to the third channel resource, where the second device determines the determined at least one RU corresponding to the third channel resource as a second channel resource for sending an available channel resource report message. It should be noted that, in this case, the RU corresponding to the third channel resource in the available idle channel of the second device is the RU included in the idle channel available to the second device, and corresponds to the second device. The intersection of the RUs included in the third channel resource.

Optionally, the second device determines, according to the available channel that is available from the second device, the second channel resource that is randomly selected from the RU corresponding to the third channel resource, or the second device according to the All of the RUs corresponding to the third channel resource in the idle channel available to the second device determine the second channel resource.

For example, the second channel resource and the third channel resource are both frequency domain resources. The first device indicates, by using the channel resource indication information, that the first channel resource is channel 1, channel 2, channel 3, and channel 4. Each channel includes four RUs, which are respectively RU1, RU2, RU3, and RU4. First device The second devices that need to determine the available idle channels are SAT1 (its device identification is device identification 1), SAT2 (its device identification is device identification 2). The order of the device identifiers in the device identifier list sent by the first device is device identifier 1 and device identifier 2. At this time, the device identification 1 may correspond to the RU 2 in each channel, and the device identification 2 may correspond to the RU 3 in each channel. The third channel resource corresponding to SAT1 is a set of RU2 in each channel; the third channel resource corresponding to SAT2 is a set of RU3 in each channel. SAT1 determines channel 1, channel 3 is available idle channel, channel 2, channel 4 is busy channel; SAT2 determines channel 3, channel 4 is available idle channel, channel 1, channel 2 is busy channel. SAT1 determines that the frequency domain resource corresponding to the third channel resource among the available idle channels is RU2 in channel 1, and determines RU2 in channel 1 as the second channel resource for transmitting the available channel resource report message. SAT2 determines that the frequency domain resource corresponding to the third channel resource among the available idle channels is RU3 in channel 3, and determines RU3 in channel 3 as the second channel resource for transmitting the available channel resource report message.

In the above example, the SAT1 may determine, as the frequency domain resource, all the frequency domain resources corresponding to the third channel resource among the frequency domain resources included in the available idle channel, that is, determine the frequency domain resource corresponding to the third channel resource. RU2 in channel 1, RU2 in channel 3, and RU2 in channel 1, and RU2 in channel 3 are determined as second channel resources for transmitting an available channel resource report message. The SAT2 may also determine, as the frequency domain resource, all the frequency domain resources corresponding to the third channel resource in the frequency domain resources included in the available idle channel, that is, determine that the frequency domain resource corresponding to the third channel resource is in the channel 3. RU3, RU3 in channel 4, and determine RU3 in channel 3, RU3 in channel 4 as the second channel resource for transmitting the available channel resource report message.

If the second channel resource and the third channel resource are both frequency-code domain resources. Determining, by the second device, a third channel resource corresponding to the second device according to the device identifier list or the channel resource mapping indication information; and determining, by the second device, at least one from the third channel resource a frequency-code domain resource corresponding to the idle channel available to the second device; the second device determining the at least one frequency-code domain resource as a second channel resource for transmitting an available channel resource report message. The elements in the third channel resource corresponding set are frequency-code domain resources, and the idle channel corresponds to the set. The element is a channel, and the frequency-code domain resource corresponding to the available idle channel is determined from the third channel resource, and the frequency domain is found from the third channel resource set for each channel in the idle channel set. Look at the frequency-code domain resource block located in the channel, that is, the frequency-code domain resource block corresponding to the channel. Forming a frequency-code domain resource set by frequency-code domain resource blocks corresponding to all channels in the idle channel set, and selecting some or all frequency-code domain resource blocks from the set to form a subset, the subset is the second Channel resources.

For example, the first device indicates, by using the channel resource indication information, that the first channel resource is channel 1, channel 2, and each channel includes four RUs, which are respectively RU1, RU2, RU3, and RU4. At the same time, the orthogonal sequence list includes four orthogonal sequences, which are respectively P1, P2, P3, and P4. The second device that the first device needs to determine the available idle channel is SAT1 (the device identifier is device identifier 1) and SAT2 (the device identifier is device identifier 2). The order of the device identifiers in the device identifier list sent by the first device is device identifier 1 and device identifier 2. The device identification 1 may correspond to RU2 in each channel and correspond to the orthogonal sequence P1; the device identification 2 may correspond to RU3 in each channel and correspond to the orthogonal sequence P2. The third channel resource corresponding to SAT1 is a set of frequency-code domain resources indicated by (RU2, P1) in each channel; the third channel resource corresponding to SAT2 is indicated by (RU3, P2) in each channel. A collection of frequency-code domain resources. If STA1 determines that channel 1 and channel 2 are available idle channels, the RU corresponding to the third channel resource in the available idle channel of STA1 is RU2 in channel 1, RU2 in channel 2, and thus can be from channel 1 ( RU2, P1), (RU2, P1) in channel 2, randomly selecting at least one frequency-code domain resource is determined as a second channel resource for transmitting an available channel resource report message; STA2 determines that channel 2 is an available idle channel, Then, the RU corresponding to the third channel resource in the available idle channel of STA2 is RU3 in channel 2, so that at least one frequency-code domain resource can be randomly selected from (RU2, P1) in channel 2 to be determined to be used for transmission. The second channel resource of the channel resource report message.

It should be noted that, in the embodiment of the present application, how to indicate the frequency-code resource is not limited, and each frequency-code resource may be numbered, and the frequency-code resource is indicated by a label corresponding to each frequency-code resource, for example, A channel contains 4 RUs, a total of 4 orthogonal sequences, then a signal is included 16 frequency-code domain resources, each frequency-code domain resource may be numbered by 1 to 16; (channel number, RU number, orthogonal sequence number) may also be used to indicate a frequency-code resource; A frequency-code resource is indicated by (channel number, frequency-code domain resource number).

In the above solution, the second device determined by the embodiment of the present application determines the available idle channel, because the second device determines the second channel resource for sending the available channel resource report message according to the available idle channel of the second device. The process itself does not cause additional interference to the OBSS.

Step 603: The second device sends the available channel resource report message to the first device by using the second channel resource, where the available channel resource report message indicates an idle channel available to the second device.

In step 603, the available channel resource report message may indicate the available idle channel of the second device in two manners. Discussed separately below.

The first mode: the available channel resource report message indicates, by using the free channel list included in the available channel resource report message, an idle channel available to the second device.

In this embodiment of the present application, the idle channel list may be used as a list of channel identifiers including idle channels available to the second device.

For example, the second device generates a list of idle channels including the channel identifier of the available idle channel, and sends the idle channel list to the first device by using an available channel resource report message, thereby indicating that the second device is available. Idle channel.

The idle channel list may also be a channel state bit bitmap for characterizing a channel state of each channel included in the first channel resource, the channel state being idle or busy. For example, setting a bit in the channel status bit bitmap to 1 indicates that the channel corresponding to the bit is idle, that is, the channel is available, and setting it to 0 indicates that the channel corresponding to the bit is busy, that is, the channel is unavailable. The second device does not send an available channel resource report message using a channel whose channel status is busy.

For example, the first device indicates, by using the channel resource indication information, that the first channel resource is channel 1, channel 2, channel 3, channel 4, channel 5, and channel 6. The second device determines the available idle The channel is channel 1, channel 2, channel 5, and the determined channel state bit bitmap may be 110010, where 1 represents an idle channel and 0 represents a busy channel. Of course, it is also possible to use 0 for the idle channel and 1 for the busy channel. The channel state bit bitmap determined at this time may be 001101.

It should be noted that, when the idle channel list is a channel state bit bitmap, the first device and the second device need to pre-appoint a channel corresponding to each bit in the channel state bit bitmap. There are various ways of arranging. For example, when the first device sends a channel resource collection message, the channel corresponding to each bit in the channel status bit bitmap is agreed in the channel resource collection message. Specifically, it can be indicated in an implicit manner. For example, the first channel resource in the channel resource collection message sent by the first device indicates an 80 MHz channel, and the idle channel list of the second device is a 4-bit channel state bit bitmap, where 4 bits respectively correspond to the indication indicated by the first channel resource. Four 20MHz channels from high to low (or low to high) in the frequency domain of the 80MHz channel.

It should be noted that, if the available channel resource report message sent by the second device includes the idle channel list, the second device may select only one RU from the available idle channels as the second channel resource for sending the available channel resource report message.

The second mode: the available channel resource report message indicates a free channel available to the second device by using a channel corresponding to the second channel resource that carries the available channel resource report message.

Specifically, if the second channel resource that carries the available channel resource report message is a frequency domain resource that includes multiple RUs, the channel corresponding to each RU in the second channel resource may serve as an idle channel available to the second device. . The "channel corresponding to the RU" refers to the channel where the RU is located. In the existing standard, the bandwidth of the channel where the RU is located is usually a 20 MHz channel.

If the second channel resource that carries the available channel resource report message is a frequency-code domain resource that includes multiple RUs and an orthogonal sequence, the channel corresponding to each frequency-code domain resource in the second channel resource may be used as the The idle channel available to the second device. The so-called "channel corresponding to the frequency-code domain resource" refers to the 20 MHz channel where the frequency-code domain resource is located. The frequency-code domain resource can be characterized by (RU, orthogonal sequence), so the so-called "channel corresponding to the frequency-code domain resource" can also be considered as a frequency-code domain resource. 20MHz channel where RU is located

For example, the second channel resource is a frequency domain resource including a plurality of RUs, and the plurality of RUs included in the second channel resource are RUs corresponding to the second device in each available idle channel of the second device. The second device sends an available channel resource report message through the second channel resource, thereby indicating an idle channel available to the second device. For another example, the second channel resource is a frequency-code domain resource that includes multiple RUs and an orthogonal sequence corresponding to the second device, and the plurality of RUs included in the second channel resource are each available idle channel of the second device. An RU corresponding to the second device. The second device sends an available channel resource report message in an orthogonal sequence corresponding to the second device in each RU included in the second channel resource, thereby indicating an idle channel available to the second device.

In this mode, the available channel resource report message sent by the second device may not include the idle channel list.

Optionally, the available channel resource report message sent by the second device may further include buffer status information, where the buffer status information is used to indicate a data amount of data that the second device needs to transmit, or The time required for the second device to transmit data.

Step 502: The first device receives an available channel resource report message sent by the second device by using a second channel resource, where the available channel resource report message indicates an idle channel available to the second device; The idle channel available to the device is determined by the second device from the first channel resource, and the second channel resource is determined by the second device according to the idle channel.

In step 502, the first device may determine, as the idle channel available to the second device, a channel corresponding to the second channel resource that carries the available channel resource report message.

For example, the first device indicates that 4 channels can be used, namely channel 1, channel 2, channel 3, and channel 4. Each channel includes 4 RUs, which are RU1, RU2, RU3, and RU4. Receiving, by the first device, the available channel resource report message sent by the second device on the RU1 of the channel 1, and receiving the available channel resource report message sent by the second device on the RU1 of the channel 3, the first device may 1. Channel 3 is determined to be an idle channel available to the second device.

The first device may also determine a free channel available to the second device according to the list of available channels in the available channel resource report message.

For example, if the first device determines the channel identifier of the received channel list including channel 1, channel 3, it may determine that channel 1 and channel 3 are idle channels available to the second device.

For example, the first device indicates that 4 channels can be used, namely channel 1, channel 2, channel 3, and channel 4. The first device determines that the received idle channel list may be 1010, and the first device may determine that channel 1 and channel 3 are available channels of the second device, where 1 represents an idle channel and 0 represents a busy channel.

The first device may further determine, according to the buffer status information in the available channel resource report message, the amount of data of the data that the second device needs to transmit, or the time required for the second device to transmit the data.

After the first device determines, according to the received available channel resource report message, the available channel of the second device, the UL MU scheduling trigger frame may be sent to schedule the second device to perform UL MU transmission on the idle channel available to the second device, so that the second device The device can respond to the scheduling trigger frame sent by the first device in time, thereby improving channel utilization.

Optionally, before the first device schedules the UL MU transmission to the second device according to the available idle channel of the second device, the second device may also be configured to send an NDP Sounding (Null Data Packet Sounding) message to measure The uplink channel of the second device, so as to ensure that the transmission parameters of each second device, such as resource allocation and MCS (Modulation and Coding Scheme), can be accurately specified during subsequent UL MU scheduling.

In the embodiment of the present application, since the first device has determined the available idle channel of the second device, the channel used by each second device to transmit NDP Sounding can be accurately scheduled, and the frequency division can be adopted between multiple second devices. The NDP Sounding is sent in a multiplexed manner, which saves time domain transmission overhead. For example, as shown in FIG. 9, a schematic diagram of a NDP sounding sent by a scheduling second device according to an embodiment of the present application is provided. FIG. 9 includes four second devices, which are respectively STA1, STA2, STA3, and STA4. There are 4 channels available, channel 1, channel 2, channel 3. Channel 4. The first device determines that the idle channels available to each second device are: the idle channel available to STA1 is channel 1, channel 4; the available idle channel for STA2 is channel 2, channel 3; and the available idle channel for STA3 is channel 1. Channel 2; the available channels available for STA4 are channel 3, channel 4. At this time, the first device may send a measurement notification message (Trigger frame for sounding, TF-S) that triggers uplink channel measurement, schedules STA1 and STA2 to send NDP Sounding at the same time, and schedules STA3 and STA4 to send NDP Sounding at the same time. , thereby improving channel utilization.

The above process is described below by way of specific embodiments.

FIG. 10 is a schematic flowchart of a channel resource indication method according to an embodiment of the present application.

The two second devices in FIG. 10 are: STA1 and STA2.

The first device initiates a random access procedure by sending a channel resource collection message including channel resource indication information, where the first channel resource indicated by the channel resource indication information includes channel 1, channel 2, channel 3, and channel 4. Each channel includes 4 RUs, which are RU1, RU2, RU3, and RU4.

After STA1 and STA2 receive the channel resource collection message sent by the first device, STA1 determines, from the first channel resource, that the available idle channel is channel 1 and channel 3; STA2 determines from the first channel resource. The available idle channel is channel 3.

STA1 randomly selects RU2 in channel 1 from the available idle channel as the second channel resource for transmitting the available channel resource report message; STA2 randomly selects from the first channel resource from the available idle channel The RU2 in channel 3 is selected as the second channel resource for transmitting the available channel resource report message.

The STA1 sends an available channel resource report message through the RU2 in the channel 1. The available channel resource report message includes a list of idle channels and buffer status information. The list of idle channels sent by STA1 may be 1010, where 1 indicates an idle channel and 0 indicates busy. channel.

STA2 sends an available channel resource report message through RU2 in channel 3, the available letter The channel resource report message includes a list of idle channels and buffer status information, and the list of idle channels sent by STA2 may include a list of channel identifiers of channel 3.

The first device receives the available channel resource report message sent by the STA1, and determines, according to the idle channel list in the available channel resource report message, that the idle channel available to the STA1 is channel 1 and channel 3, and determines according to the buffer status information in the available channel resource report message. The amount of data that STA1 needs to transmit data, or the time that STA1 needs to transmit data.

The first device receives the available channel resource report message sent by the STA2, and determines that the idle channel available to the STA2 is the channel 3 according to the idle channel list in the available channel resource report message, and determines that the STA2 needs to transmit according to the buffer status information in the available channel resource report message. The amount of data in the data.

FIG. 11 is a schematic flowchart of a channel resource indication method according to an embodiment of the present application.

The second device included in FIG. 11 is: STA1.

The first device sends a channel resource collection message including channel resource indication information, where the first channel resource indicated by the channel resource indication information includes channel 1, channel 2, channel 3, and channel 4, and each channel includes 4 RUs, respectively RU1, RU2, RU3, RU4. At the same time, the channel resource collection message sent by the first device includes a device identifier list, and the device identifier list includes the device identifier of STA1.

After receiving the channel resource collection message sent by the first device, the STA1 determines that the device identifier includes the device identifier of the STA1, and determines that the available idle channel is the channel 1 and the channel 3 from the first channel resource.

The STA1 randomly selects the RU3 in the channel 1 from the available idle channel from the first channel resource as the second channel resource for transmitting the available channel resource report message.

STA1 sends an available channel resource report message through RU3 in channel 1. The available channel resource report message includes a list of idle channels, and the list of idle channels sent by STA1 may be 1010, where 1 represents an idle channel and 0 represents a busy channel.

Optionally, the available channel resource report message sent by STA1 further includes cache status information.

The first device receives the available channel resource report message sent by STA1, and determines that the idle channel available to STA1 is channel 1 and channel 3 according to the idle channel list in the available channel resource report message.

FIG. 12 is a schematic flowchart of a channel resource indication method according to an embodiment of the present application.

The first device sends a channel resource collection message including channel resource indication information, where the first channel resource indicated by the channel resource indication information includes channel 1, channel 2, channel 3, and channel 4, and each channel includes 4 RUs, respectively RU1, RU2, RU3, RU4. At the same time, the channel resource collection message sent by the first device includes a device identifier list, where the device identifier list includes the device identifier of STA1 and the device identifier of STA2, where the device identifier of STA1 is located in the first digit, and the device identifier of STA2 is located in the second digit. .

After receiving the channel resource collection message sent by the first device, the STA1 determines that the device identifier includes the device identifier of the STA1, and determines, from the first channel resource, that the available idle channel is the channel 1, the channel 3, and the channel. 4. The STA1 determines that the third channel resource corresponding to the STA1 is the RU1 in the channel 1, the RU1 in the channel 2, the RU1 in the channel 3, and the RU1 in the channel 4 according to the order in which the device identifier of the STA1 is located in the device identification list.

All the RUs corresponding to the third channel resource in the available idle channel of the STA1 are determined as the second channel resource, that is, the RU1 in the channel 1, the RU1 in the channel 3, and the RU1 in the channel 4 are determined as the second channel resource.

STA1 sends an available channel resource report message to the first device through the second channel resource.

After receiving the available channel resource report message sent by the STA1, the first device may determine, as the idle channel available to the second device, the channel corresponding to the second channel resource that carries the available channel resource report message.

In conjunction with the above description, STA1 may also randomly select one RU from the available idle channel and the RU corresponding to the third channel resource, for example, select RU1 in channel 1. STA1 will be randomly selected The selected RU corresponding to the third channel resource is determined to be a second channel resource for transmitting an available channel resource report message. The STA1 sends an available channel resource report message to the first device by using the second channel resource, where the available channel resource report message includes an idle channel list, and the idle channel list sent by STA1 may be 1010, where 1 represents an idle channel, and 0 represents a busy channel. . Optionally, the available channel resource report message sent by STA1 further includes cache status information. The first device receives the available channel resource report message sent by STA1, and determines that the idle channel available to STA1 is channel 1 and channel 3 according to the idle channel list in the available channel resource report message.

FIG. 13 is a schematic flowchart of a channel resource indication method according to an embodiment of the present application.

The first device sends a channel resource collection message including channel resource indication information, where the first channel resource indicated by the channel resource indication information includes channel 1, channel 2, channel 3, and channel 4, and each channel includes 4 RUs, respectively RU1, RU2, RU3, RU4. At the same time, the channel resource collection message sent by the first device includes a device identifier list, where the device identifier list includes the device identifier of STA1 and the device identifier of STA2. The channel resource collection message sent by the first device further includes channel resource mapping indication information, where the channel resource mapping indication information indicates that the device identifier 1 corresponds to the RU1 in each channel, and the indication device identifier 2 corresponds to the RU1 in each channel. .

After receiving the channel resource collection message sent by the first device, the STA1 determines that the device identifier includes the device identifier of the STA1, and determines that the available idle channel is the channel 1 and the channel 3 from the first channel resource. The STA1 determines, according to the channel resource mapping indication information, that the third channel resource corresponding to the STA1 is the RU1 in the channel 1, the RU1 in the channel 2, the RU1 in the channel 3, and the RU1 in the channel 4.

After receiving the channel resource collection message sent by the first device, the STA2 determines that the device identifier includes the device identifier of the STA2, and determines that the available idle channel is the channel 1 from the first channel resource. The STA2 determines, according to the channel resource mapping indication information, that the third channel resource corresponding to the STA2 is the RU1 in the channel 1, the RU1 in the channel 2, the RU1 in the channel 3, and the RU1 in the channel 4.

STA1 randomly selects one RU corresponding to the third channel resource according to the available idle channels, for example, selects RU1 in channel 1. STA2 randomly selects an RU corresponding to the third channel resource according to the available idle channels. At this time, STA2 can only select RU1 in channel 1.

STA1 determines RU1 in channel 1 as a second channel resource for transmitting an available channel resource report message. STA2 determines RU1 in channel 1 as a second channel resource for transmitting an available channel resource report message.

The STA1 sends an available channel resource report message to the first device by using the second channel resource, where the available channel resource report message includes an idle channel list, and the idle channel list sent by STA1 may be 1010, where 1 represents an idle channel, and 0 represents a busy channel. .

The STA2 sends an available channel resource report message to the first device by using the second channel resource, where the available channel resource report message includes an idle channel list, and the idle channel list sent by STA2 may be 1000, where 1 represents an idle channel, and 0 represents a busy channel. .

FIG. 14 is a schematic flowchart of a channel resource indication method according to an embodiment of the present application.

The first device sends a channel resource collection message including channel resource indication information, where the first channel resource indicated by the channel resource indication information includes channel 1, channel 2, and each channel includes 4 RUs, which are respectively RU1, RU2, RU3, RU4, four orthogonal sequences can be used in each RU, which are orthogonal sequence 1, orthogonal sequence 2, orthogonal sequence 3, and orthogonal sequence 4. At the same time, the channel resource collection message sent by the first device includes a device identifier list, where the device identifier list includes the device identifier of STA1 and the device identifier of STA2. The channel resource collection message sent by the first device further includes channel resource mapping indication information, where the channel resource mapping indication information indicates that the device identifier 1 corresponds to the RU1 in each channel, and corresponds to the orthogonal sequence 1; The indication information indicates that the device identification 2 corresponds to the RU2 in each channel and corresponds to the orthogonal sequence 1.

After receiving the channel resource collection message sent by the first device, the STA1 determines that the device identifier includes the device identifier of the STA1, and determines that the available idle channel is the channel 1 and the channel 2 from the first channel resource. STA1 determines and STA1 according to channel resource mapping indication information. The corresponding third channel resource is a combination of RU1 and orthogonal sequence 1 in channel 1, and a combination of RU1 and orthogonal sequence 1 in channel 2.

After receiving the channel resource collection message sent by the first device, the STA2 determines that the device identifier includes the device identifier of the STA2, and determines that the available idle channel is the channel 1 from the first channel resource. The STA2 determines, according to the channel resource mapping indication information, that the third channel resource corresponding to STA2 is a combination of RU2 and orthogonal sequence 1 in channel 1, and a combination of RU2 and orthogonal sequence 1 in channel 2.

The STA1 selects one RU corresponding to the third channel resource according to the available idle channels. At this time, the STA1 selects the RU1 in the channel 1, and the RU1 in the channel 2, and then the STA1 selects from the third channel resource corresponding to the STA1 according to the selected RU. The second channel resource is determined to be a combination of RU1 and orthogonal sequence 1, and a combination of RU1 and orthogonal sequence 1 in channel 2. STA2 selects one RU corresponding to the third channel resource according to the available idle channels. At this time, STA2 can only select RU1 in channel 2. STA2 then determines from the third channel resource corresponding to STA2 that the second channel resource is the combination of RU2 and orthogonal sequence 1 in channel 2 according to the selected RU.

The STA1 sends an available channel resource report message to the first device by using the determined second channel resource; the STA2 sends the available channel resource report message to the first device by using the determined second channel resource. It should be noted that, at this time, the available channel resource report message sent by STA1 and STA2 does not include the idle channel list.

After receiving the available channel resource report message sent by the STA1, the first device may determine, as the idle channel available to the second device, the channel corresponding to the second channel resource of the available channel resource report message sent by the STA1, that is, the channel 1 and Channel 2 is determined to be the idle channel available to STA1.

After receiving the available channel resource report message sent by the STA2, the first device may determine, as the idle channel available to the second device, the channel corresponding to the second channel resource of the available channel resource report message sent by the STA2, that is, determine the channel 2 The idle channel available for STA2.

Based on the same technical concept, the embodiment of the present application further provides a channel resource indication device. The apparatus can perform the above method embodiments.

As shown in FIG. 15, a channel resource indication device is provided in the embodiment of the present application, where the device includes:

The sending unit 1501 is configured to send a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

The receiving unit 1502 is configured to receive an available channel resource report message sent by the second device by using a second channel resource, where the available channel resource report message indicates an idle channel available to the second device; the second device is available. The idle channel is determined by the second device from the first channel resource, and the second channel resource is determined by the second device according to the idle channel.

Optionally, the receiving unit 1502 is specifically configured to:

The first channel resource is a frequency domain resource.

As shown in FIG. 16, the embodiment of the present application provides a channel resource indication device, where the device includes:

The receiving unit 1601 is configured to receive, by the first device, a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

a determining unit 1602, configured to determine, from the first channel resource, an idle channel available to the second device, and determine a second channel resource according to the available idle channel of the second device;

The sending unit 1603 is configured to send, by using the second channel resource, the available channel resource report message to the first device, where the available channel resource report message indicates an idle channel available to the second device.

Optionally, the determining unit 1602 is specifically configured to:

Optionally, the determining unit 1602 is further configured to:

Optionally, the determining unit 1602 is specifically configured to:

Optionally, the sending unit 1603 is specifically configured to:

The first channel resource is a frequency domain resource.

As shown in FIG. 17, a channel resource indication device is provided in the embodiment of the present application, where the device includes:

The processor 1701, the memory 1702, and the transceiver 1703.

The transceiver 1703 can be a wired transceiver, a wireless transceiver, or a combination thereof. The wired transceiver can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless transceiver can be, for example, a wireless local area network transceiver, a cellular network transceiver, or a combination thereof. The processor 1701 may be a central processing unit (English: central processing unit, abbreviated: CPU), a network processor (English: network processor, abbreviated: NP) or a combination of a CPU and an NP. The processor 1701 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (abbreviated as PLD), or a combination thereof. The above PLD can be a complex programmable logic device (English: complex programmable logic device, Write: CPLD), field-programmable gate array (English: field-programmable gate array, abbreviation: FPGA), general array logic (English: general array logic, abbreviation: GAL) or any combination thereof. The memory 1702 may include a volatile memory (English: volatile memory), such as a random access memory (English: random-access memory, abbreviation: RAM); the memory 1702 may also include a non-volatile memory (English: non-volatile memory) ), such as read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state Drive, abbreviation: SSD); the memory 1702 may also include a combination of the above types of memories.

The transceiver 1703 is configured to send a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource, and is used to receive the available channel resource that is sent by the second device by using the second channel resource. Reporting a message, the available channel resource report message indicating an idle channel available to the second device; the available idle channel of the second device is determined by the second device from the first channel resource, The second channel resource is determined by the second device according to the idle channel.

Optionally, the transceiver 1703 is specifically configured to:

The available channel resource report message passes the idle in the available channel resource report message The channel list indicates a free channel available to the second device; or,

The first channel resource is a frequency domain resource.

As shown in FIG. 18, a channel resource indication device is provided in the embodiment of the present application, where the device includes:

The processor 1801, the memory 1802, and the transceiver 1803.

The transceiver 1803 can be a wired transceiver, a wireless transceiver, or a combination thereof. The wired transceiver can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless transceiver can be, for example, a wireless local area network transceiver, a cellular network transceiver, or a combination thereof. The processor 1801 may be a CPU, an NP or a combination of a CPU and an NP. The processor 1801 may further include a hardware chip. The hardware chip described above may be an application specific integrated circuit ASIC, a PLD, or a combination thereof. The above PLD may be a CPLD, an FPGA, a GAL, or any combination thereof. The memory 1802 can include volatile memory, such as RAM; the memory 1802 can also include non-volatile memory, such as ROM, flash memory, HDD or SSD; the memory 1802 can also include a combination of the types of memory described above.

The transceiver 1803 is configured to receive, by the first device, a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

The processor 1801 is configured to determine, from the first channel resource, an idle channel that is available to the second device, and determine a second channel resource according to the available idle channel of the second device;

The transceiver 1803 is configured to send, by using the second channel resource, the available channel resource report message to the first device, where the available channel resource report message indicates an idle channel available to the second device.

Optionally, the processor 1801 is specifically configured to:

Optionally, the processor 1801 is further configured to:

Optionally, the processor 1801 is specifically configured to:

The first channel resource is a frequency domain resource.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the present application has been described, it will be apparent that those skilled in the art can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the scope of the application. Thus, it is intended that the present invention include such modifications and variations as the modifications and variations of the present invention are intended to be included within the scope of the appended claims.

Claims

A channel resource indication method, the method comprising:

The first device sends a channel resource collection message including channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

Receiving, by the first device, an available channel resource report message sent by the second device by using a second channel resource, where the available channel resource report message indicates an available idle channel of the second device; The idle channel is determined by the second device from the first channel resource, and the second channel resource is determined by the second device according to the idle channel.
The method according to claim 1, wherein the channel resource collection message further includes a device identifier list, where the device identifier list is used to indicate that the second identifier of the device identifier in the device identifier list is according to the The channel resource collection message sends the available channel resource report message.
The method according to claim 2, wherein the device identification list is further configured to indicate that the second device determines, according to an order in which the device identifier of the second device is located in the device identification list, A third channel resource corresponding to the second device, where the second channel resource is a subset of the third channel resource.
The method according to claim 1, wherein the channel resource collection message further includes channel resource mapping indication information;

The channel resource mapping indication information is used to indicate a third channel resource corresponding to the second device, and the second channel resource is a subset of the third channel resource.
The method of claim 1, wherein the available channel resource report message indicates an available idle channel of the second device, including:

The available channel resource report message indicates, by using a list of idle channels in the available channel resource report message, an idle channel available to the second device; or

The available channel resource report message indicates a free channel available to the second device by using a channel corresponding to the second channel resource that carries the available channel resource report message.
The method of claim 5, wherein the idle channel list is a list of channel identifiers including idle channels available to the second device; or

The idle channel list is a channel state bit bitmap, and the channel resource status bit bitmap is used to characterize a channel state of each channel included in the first channel resource, where the channel state is idle or busy.
The method according to any one of claims 1 to 6, wherein the available channel resource report message further includes buffer status information, and the buffer status information indicates a data amount of data that the second device needs to transmit. .
The method according to any one of claims 3 to 7, wherein the second channel resource is a frequency domain resource, or a time-frequency domain resource, or a frequency-code domain resource; and the third channel resource is a frequency domain resource. , or time-frequency domain resources, or frequency-code domain resources;

The first channel resource is a frequency domain resource.
The method according to any one of claims 1 to 8, wherein the idle channel available to the second device is a channel that satisfies one of the following conditions:

The network allocation vector NAV of the second device is a channel corresponding to 0; or

Determining, by the second device, a channel determined to be idle by the CCA according to the idle channel; or

The NAV of the second device is a channel corresponding to 0 and is determined to be an idle channel according to the CCA.
A channel resource indication method, the method comprising:

The second device receives, by the first device, a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

Determining, by the second device, an idle channel available to the second device from the first channel resource, and determining a second channel resource according to the available idle channel of the second device;

The second device sends the available channel resource report message to the first device by using the second channel resource, where the available channel resource report message indicates an idle channel available to the second device.
The method of claim 10 wherein said channel resource collection message The device identifier list is further configured to: the second device that indicates that the device identifier is located in the device identifier list, and sends the available channel resource report message according to the channel resource collection message.
The method according to claim 10, wherein the channel resource collection message further includes a device identifier list or channel resource mapping indication information;

The device identifier list is used to indicate that the second device determines a third channel resource corresponding to the second device according to an order in which the device identifier of the second device is located in the device identifier list;

The channel resource mapping indication information is used to indicate a third channel resource corresponding to the second device.
The method according to claim 12, wherein the determining, according to the available idle channel of the second device, the second channel resource for sending the available channel resource report message comprises:

Determining, by the second device, a third channel resource corresponding to the second device according to the device identifier list or the channel resource mapping indication information;

Determining, by the second device, at least one frequency domain resource corresponding to the third channel resource from the available idle channels of the second device;

Determining, by the second device, a second channel resource for transmitting an available channel resource report message from the third channel resource according to the at least one frequency domain resource corresponding to the third channel resource.
The method according to any one of claims 12 to 13, wherein before the determining, by the second device, the idle channel available to the second device from the first channel resource, the method further includes:

The second device determines that the device identifier of the second device is located in the device identifier list.
The method according to claim 10, wherein said determining a second channel resource for transmitting an available channel resource report message according to a free channel available to said second device, include:

The second device randomly selects at least one frequency domain resource from the available idle channels of the second device, and determines a second channel resource for sending the available channel resource report message according to the at least one frequency domain resource.
The method according to any one of claims 10 to 15, wherein the available channel resource report message indicates an available idle channel of the second device, including:

The available channel resource report message indicates, by using a list of idle channels in the available channel resource report message, an idle channel available to the second device; or

The available channel resource report message indicates a free channel available to the second device by using a channel corresponding to the second channel resource that carries the available channel resource report message.
The method according to claim 16, wherein the list of available channels is a list of channel identifiers including idle channels available to the second device; or

The idle channel list is a channel state bit bitmap, and the channel resource status bit bitmap is used to characterize a channel state of each channel included in the first channel resource, where the channel state is idle or busy.
The method according to any one of claims 10 to 17, wherein the available channel resource report message further includes buffer status information, and the buffer status information indicates a data amount of data that the second device needs to transmit. .
The method according to any one of claims 12 to 18, wherein the second channel resource is a frequency domain resource, or a time-frequency domain resource, or a frequency-code domain resource; and the third channel resource is a frequency domain resource. , or time-frequency domain resources, or frequency-code domain resources;

The first channel resource is a frequency domain resource.
The method according to any one of claims 10 to 19, wherein the idle channel available to the second device is a channel that satisfies one of the following conditions:

The network allocation vector NAV of the second device is a channel corresponding to 0; or

Determining, by the second device, a channel determined to be idle by the CCA according to the idle channel; or

The NAV of the second device is a channel corresponding to 0 and is determined to be an idle channel according to the CCA.
A channel resource indicating device, the device comprising:

a sending unit, configured to send a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

a receiving unit, configured to receive an available channel resource report message sent by the second device by using a second channel resource, where the available channel resource report message indicates an available idle channel of the second device; the second device is available The idle channel is determined by the second device from the first channel resource, and the second channel resource is determined by the second device according to the idle channel.
The device according to claim 21, wherein the channel resource collection message further includes a device identifier list, where the device identifier list is used to indicate that the second identifier of the device identifier in the device identifier list is according to the The channel resource collection message sends the available channel resource report message.
The device according to claim 22, wherein the device identification list is further configured to instruct the second device to determine, according to an order in which the device identifier of the second device is located in the device identification list, A third channel resource corresponding to the second device, where the second channel resource is a subset of the third channel resource.
The device according to claim 21, wherein the channel resource collection message further includes channel resource mapping indication information;

The channel resource mapping indication information is used to indicate a third channel resource corresponding to the second device, and the second channel resource is a subset of the third channel resource.
The device according to claim 21, wherein the receiving unit is specifically configured to:

The available channel resource report message indicates, by using a list of idle channels in the available channel resource report message, an idle channel available to the second device; or

The available channel resource report message indicates a free channel available to the second device by using a channel corresponding to the second channel resource that carries the available channel resource report message.
The apparatus according to claim 25, wherein said list of free channels is a packet a list of channel identifiers of the idle channels available to the second device; or

The idle channel list is a channel state bit bitmap, and the channel resource status bit bitmap is used to characterize a channel state of each channel included in the first channel resource, where the channel state is idle or busy.
The device according to any one of claims 21 to 26, wherein the available channel resource report message further includes buffer status information, and the buffer status information indicates a data amount of data that the second device needs to transmit. .
The apparatus according to any one of claims 23 to 27, wherein the second channel resource is a frequency domain resource, or a time-frequency domain resource, or a frequency-code domain resource; and the third channel resource is a frequency domain resource. , or time-frequency domain resources, or frequency-code domain resources;

The first channel resource is a frequency domain resource.
The apparatus according to any one of claims 21 to 28, wherein the idle channel available to the second device is a channel that satisfies one of the following conditions:

The network allocation vector NAV of the second device is a channel corresponding to 0; or

Determining, by the second device, a channel determined to be idle by the CCA according to the idle channel; or

The NAV of the second device is a channel corresponding to 0 and is determined to be an idle channel according to the CCA.
A channel resource indicating device, the device comprising:

a receiving unit, configured to receive, by the first device, a channel resource collection message that includes channel resource indication information, where the channel resource indication information is used to indicate the first channel resource;

a determining unit, configured to determine, from the first channel resource, an idle channel available to the second device, and determine a second channel resource according to the available idle channel of the second device;

And a sending unit, configured to send, by using the second channel resource, the available channel resource report message to the first device, where the available channel resource report message indicates an available idle channel of the second device.
The device according to claim 30, wherein the channel resource collection message further includes a device identifier list, where the device identifier list is used to indicate that the device identifier is located in the device The second device in the backup identifier list sends the available channel resource report message according to the channel resource collection message.
The device according to claim 30, wherein the channel resource collection message further includes a device identifier list or channel resource mapping indication information;

The device identifier list is used to indicate that the second device determines a third channel resource corresponding to the second device according to an order in which the device identifier of the second device is located in the device identifier list;

The channel resource mapping indication information is used to indicate a third channel resource corresponding to the second device.
The device according to claim 32, wherein the determining unit is specifically configured to:

Determining, according to the device identifier list or the channel resource mapping indication information, a third channel resource corresponding to the second device;

Determining at least one frequency domain resource corresponding to the third channel resource from the available idle channels of the second device;

Determining, according to the at least one frequency domain resource corresponding to the third channel resource, a second channel resource for transmitting an available channel resource report message from the third channel resource.
The device according to any one of claims 32 to 33, wherein the determining unit is further configured to:

The second device determines that the device identifier of the second device is located in the device identifier list.
The apparatus according to claim 30, wherein said determining unit is specifically configured to:

At least one frequency domain resource is randomly selected from the available idle channels of the second device, and the second channel resource for transmitting the available channel resource report message is determined according to the at least one frequency domain resource.
The device according to any one of claims 30 to 35, wherein the sending unit is specifically configured to:

The available channel resource report message indicates, by using a list of idle channels in the available channel resource report message, an idle channel available to the second device; or

The available channel resource report message indicates a free channel available to the second device by using a channel corresponding to the second channel resource that carries the available channel resource report message.
The apparatus according to claim 36, wherein said list of free channels is a list of channel identifiers including idle channels available to said second device; or

The idle channel list is a channel state bit bitmap, and the channel resource status bit bitmap is used to characterize a channel state of each channel included in the first channel resource, where the channel state is idle or busy.
The device according to any one of claims 30 to 37, wherein the available channel resource report message further includes buffer status information, and the buffer status information indicates a data amount of data that the second device needs to transmit. .
The device according to any one of claims 32 to 38, wherein the second channel resource is a frequency domain resource, or a time-frequency domain resource, or a frequency-code domain resource; and the third channel resource is a frequency domain resource. , or time-frequency domain resources, or frequency-code domain resources;

The first channel resource is a frequency domain resource.
The apparatus according to any one of claims 30 to 39, wherein the available idle channel of the second device is a channel that satisfies one of the following conditions:

The network allocation vector NAV of the second device is a channel corresponding to 0; or

Determining, by the second device, a channel determined to be idle by the CCA according to the idle channel; or

The NAV of the second device is a channel corresponding to 0 and is determined to be an idle channel according to the CCA.