WO2016177089A1

WO2016177089A1 - Method and device for processing resource indication, and access point and station

Info

Publication number: WO2016177089A1
Application number: PCT/CN2016/076000
Authority: WO
Inventors: 郭宇宸; 林梅露; 于健; 杨讯; 刘乐
Original assignee: 华为技术有限公司
Priority date: 2015-05-05
Filing date: 2016-03-09
Publication date: 2016-11-10

Abstract

A method for processing a resource indication applies to using an OFDMA technology wireless local area network to send or receive a triggering frame, the triggering frame comprising: information (I1) used for indicating whether said triggering frame allows random access transmission.

Description

Resource indication processing method, processing device, access point and site

Technical field

The present invention relates to the field of wireless communication technologies and, more particularly, to a method, an access point, and a station for transmitting information.

Background technique

With the development of the mobile Internet and the popularity of smart terminals, data traffic has grown rapidly. Wireless Local Area Network (WLAN) has become one of the mainstream mobile broadband access technologies due to its high speed and low cost.

In order to greatly increase the service transmission rate of the WLAN system, the next generation of Institute of Electrical and Electronics Engineers (IEEE) 802.11ax standard will be in the existing Orthogonal Frequency Division Multiplexing (OFDM) technology. On the basis of the above, Orthogonal Frequency Division Multiple Access (OFDMA) technology is further adopted. The OFDMA technology divides the air interface radio channel communication resource into a plurality of orthogonal communication resource blocks (RBs), and the RBs may be shared in time and orthogonal in the frequency domain.

OFDMA technology supports multiple nodes to simultaneously send and receive data. When the access point needs to transmit data with the station, the resource allocation is performed based on the RB or the RB group; different channel resources are allocated to different STAs at the same time, so that multiple STAs access the channel efficiently, thereby improving channel utilization. For an OFDMA-based WLAN system, it is necessary to efficiently indicate communication resources to STAs.

Summary of the invention

Embodiments of the present invention provide a method for transmitting information, and a corresponding processing device, such as an access point and a station, capable of efficiently indicating a communication resource to a station.

In one aspect, a method for sending a resource indication is provided, including:

The access point generates a trigger frame, where the trigger frame includes: information (I1) for indicating whether the trigger frame allows random access transmission;

The access point sends the trigger frame.

In another aspect, a resource indication receiving method is provided, including

Receiving, by the station, a trigger frame, where the trigger frame includes information (I1) for indicating whether the trigger frame allows random access transmission;

When the station needs to perform random access transmission, the station uses the random access resource indicated by the trigger frame to perform random access transmission.

In another aspect, a method for sending a resource indication is provided, including:

The access point generates a trigger frame, where the trigger frame includes: information indicating the number of subchannels used for random access (I3); or, indicating the total number of resource units RU for random access. Information (I4);

The access point sends the trigger frame.

The station receives a trigger frame, where the trigger frame includes: information indicating the number of subchannels used for random access (I3); or information indicating a total number of resource units RU for random access ( I4);

The access point generates a trigger frame, where the trigger frame includes: a subchannel allocation field, configured to indicate multiple subchannels into which the entire bandwidth is divided; and, used to indicate that the subchannel allocation field is divided into subchannels Information for a subchannel for random access (I6);

The access point sends the trigger frame.

The station receives the trigger frame, and the trigger frame includes: a subchannel allocation field, which is used to indicate that the whole Multiple subchannels divided into bandwidths; and,

Information (I6) for indicating a subchannel for random access in a subchannel divided by the subchannel allocation field;

The access point generates a trigger frame, where the trigger frame includes: a subchannel allocation field, configured to indicate a plurality of subchannels into which the entire bandwidth is divided; and a user information portion, configured to allocate, for the subchannel, a portion indicated by the field a subchannel indicating configuration information of each of the partial subchannels; wherein, among the plurality of subchannels indicated by the subchannel allocation field, there is no remaining partial subchannel indicating configuration information in the user information portion For random access;

The access point sends the trigger frame.

The station receives a trigger frame, where the trigger frame includes: a subchannel allocation field, configured to indicate a plurality of subchannels into which the entire bandwidth is divided; and a user information portion, configured to allocate, for the subchannel, a partial subchannel indicated by the field And indicating configuration information of each of the partial subchannels, wherein, among the plurality of subchannels indicated by the subchannel allocation field, there is no remaining partial subchannel indicating configuration information in the user information portion, For random access;

The access point generates a trigger frame, where the trigger frame includes: a subchannel allocation field, which is used to indicate multiple subchannels into which the entire bandwidth is divided; and a user information part, which is used to allocate each sub-channel in the subchannel allocation field. Channel indicating that each of the subchannels will be scheduled for transmission or random access transmission, and configured to schedule configuration information during transmission, or for random use The number of RUs occupied by each random access channel when accessing the transmission;

The access point sends the trigger frame.

The station receives a trigger frame, where the trigger frame includes: a subchannel allocation field for indicating a plurality of subchannels into which the entire bandwidth is divided; and a user information portion for each subchannel allocated in the subchannel allocation field, Instructing each of the subchannels to schedule transmission or random access transmission, and configuration information used for scheduling transmission, or the number of RUs occupied by each random access channel for random access transmission;

Correspondingly, embodiments of the present invention also provide corresponding devices, such as chips, access points, or sites, that can perform the foregoing methods.

Through the foregoing embodiments, the communication resources that can be used for random access can be indicated to the site efficiently, which facilitates the use of the site, and some embodiments can save some communication resources.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1a is a schematic diagram of a system architecture applicable to an embodiment of the present invention.

FIG. 1b is a schematic flowchart of an applicable embodiment of the present invention.

2 is a schematic diagram of a physical layer trigger frame in accordance with an embodiment of the present invention.

3 is a schematic diagram of a MAC layer trigger frame according to an embodiment of the present invention.

4 is a schematic structural diagram of a trigger frame according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of subchannel allocation information according to an embodiment of the present invention.

6 is a schematic diagram of resource block allocation in accordance with an embodiment of the present invention.

7 is a schematic diagram of subchannel allocation in accordance with an embodiment of the present invention.

8, 9, 10a, 10b, 11a, 11b, 12a, 12b, 12c, 12d, 12da, 12e, 13, 14, and 15 are respectively schematic structural diagrams of a trigger frame according to an embodiment of the present invention.

Figure 16 is a diagram showing the position of a subchannel according to an embodiment of the present invention.

Figure 17 is a block diagram of an access point in accordance with an embodiment of the present invention.

Figure 18 is a block diagram of a station in accordance with an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

An Access Point (AP), which can also be called a wireless access point or bridge or hotspot, can access a server or a communication network.

A station (STA, Station), which may also be referred to as a user, may be a wireless sensor, a wireless communication terminal, or a mobile terminal, such as a mobile phone (or "cellular" phone) that supports WiFi communication functions and a computer with wireless communication capabilities. For example, it may be a portable, pocket-sized, handheld, computer-built, wearable, or in-vehicle wireless communication device that supports WiFi communication functions, and exchanges communication data such as voice and data with the wireless access network.

FIG. 1a is a simplified schematic diagram of a WLAN system to which an embodiment of the present invention is applied. The system of Figure 1a includes one or more access points AP 101 and one or more stations STA 102. The OFDMA technology is used for wireless communication between the access point 101 and the site 102. The trigger frame sent by the access point 101 includes indication information for the communication resources of the station 102 or the site group.

Specifically, referring to FIG. 1b, an embodiment of the present invention provides a method for resource indication, The WLAN is configured to use the OFDMA technology, and the access point AP constructs (or generates) a triggering frame, where the triggering frame includes: information for indicating a random access resource, and the specific structure may refer to subsequent implementation manners.

As mentioned above, an OFDMA transmission is a multi-user transmission. Generally, a trigger frame transmitted by an AP includes subchannel allocation information and a user information part. Wherein, in the embodiment provided by the present invention, the subchannel allocation information is used to divide the entire channel into subchannels, and the user information part is used to allocate a specific subchannel to a specific user (for scheduling transmission), or A particular subchannel allocation is used for random access transmission (ie, any user can transmit on that subchannel).

Trigger frame structure

The trigger frame mentioned in each embodiment of the present disclosure may be a physical layer trigger frame or a MAC layer trigger frame. The trigger frame is used to trigger an OFDMA transmission.

For the physical layer trigger frame, for example, it is an NDP frame with only the physical layer preamble and no MPDU (ie, MAC layer protocol data unit) part. As shown in FIG. 2, the physical layer trigger frame includes two parts: legacy preamble and HE preamble, and the efficient preamble includes four parts: HE-SIG A, HE-SIG B, HE-STF, and HE-LTF. The trigger signaling of the trigger frame is located in the HE-SIG B of the HE preamble of the physical layer preamble.

For the MAC layer trigger frame, it includes a physical layer preamble and an MPDU, wherein the MPDU further includes a MAC header and a payload. As shown in FIG. 3, the trigger signaling of the trigger frame is located in the payload of the MPDU.

Whether it is a physical layer trigger frame or a MAC layer trigger frame, the trigger signaling includes a common information portion and a user information portion located after the common information portion, as shown in FIG. The common information part contains common information for all users, such as subchannel allocation information, or transmission parameters such as bandwidth. As shown in FIG. 5, the subchannel allocation information is mainly used to indicate a plurality of subchannels into which the entire bandwidth is divided; the user information part is configuration information for each subchannel, and each subchannel has a corresponding piece of user information for indicating The subchannels allocated in the subchannel assignment field will Information about which site or group of sites to transmit and the corresponding transmission parameters. In the example of FIG. 5, the subchannel allocation information divides the entire bandwidth into 4 subchannels, and the user information portion will include 4 pieces of user information, corresponding to each subchannel. The user information part contains information such as the user's identity and transmission parameters, such as MCS, or spatial stream. Generally, after receiving the trigger frame, the station first reads the public information part, and then reads the user information part if necessary.

Although the subchannel allocation information is not necessary for each embodiment, for the sake of clarity of the description, the subchannel allocation information will be described in detail below. Generally, subchannel allocation is performed based on a minimum communication resource unit for transmission, a resource unit (RU), in other words, one or more consecutive resource units RU form a subchannel, and in actual transmission, for each A subchannel allocates a site or group of stations on which the subchannel is transmitted. In other words, the frequency band in which one or more RUs allocated by one station or group of stations is called a subchannel. It should be noted that the RU mentioned in the present invention refers to a subcarrier group composed of several subcarriers. For example, in the next generation Wifi standard, the RU is a subcarrier group composed of 26 subcarriers.

For example, a 20 MHz bandwidth channel includes 9 resource units (RUs), and the subchannel allocation information includes 9 bits, and each bit is used to indicate a channel of 20 MHz bandwidth for the split information for the 9 RUs. It is divided into several subchannels, each of which occupies one or more RUs. For example, referring to FIG. 5, an example of assigning information to one subchannel: "001101111". As shown in the left side of FIG. 5, each bit represents the following meaning: the first two 0s indicate that the first two RUs form one subchannel, and the next two 1s indicate that the third and fourth RUs form a subchannel. The next 0 indicates that the fifth RU forms a subchannel, and the last four 1 indicates that the last four RUs form a subchannel, as shown on the right side of FIG.

For each subchannel, a corresponding user information part is required to indicate user parameter information, including the ID of the user (the ID of the station or the site group), and the transmission parameters such as the MCS or the number of streams, and the like. There are no restrictions on specific parameters.

More specifically, at present 802.11ax uses 26 subcarriers as one resource block. As shown in Figure 6, taking 20M bandwidth as an example, 802.11ax has 256 DFT/IDFT points in the data symbol portion. That is, there are 256 subcarriers, where subcarriers -1, 0, 1 are direct current (DC), left side subcarriers -122 to subcarrier-2, and right side subcarrier 2 to subcarrier 122 are used to carry data information. That is, there are 242 subcarriers used to carry data information. Subcarrier-128 to subcarrier-123 and subcarrier 123 to subcarrier 128 are guard bands. These 242 subcarriers are divided into 9 resource blocks, each resource block is 26 subcarriers, and 8 unused subcarriers remain. As can be seen from FIG. 6, the nine resource blocks occupy subcarrier-122 to subcarrier-97 (resource block 1), subcarrier-95 to subcarrier-70 (resource block 2), and subcarrier-68 to sub-portion, respectively. Carrier-43 (Resource Block 3), Subcarrier-41 to Subcarrier-16 (Resource Block 4), Subcarrier-14 to Subcarrier 14 (Resource Block 5), Subcarrier 16 to Subcarrier 41 (Resource Block (Resource) Block 6), subcarrier 43 to subcarrier 68 (resource block 7), subcarrier 70 to subcarrier 95 (resource block 8), subcarrier 97 to subcarrier 122 (resource block 9), and the remaining 8 are unused The subcarriers are subcarriers -96, -69, -42, -15, 15, 42, 69, 96, respectively, referred to herein as a set of spare subcarriers.

More specifically, 802.11ax divides resource blocks (subchannel allocation) as follows. Taking a 20M bandwidth communication channel as an example, there are only 1*26, 2*26, 4*26, 242 resource blocks of four sizes. . Referring to FIG. 7, the 20 MHz bandwidth block diagram (ie, the subchannel allocation map) is divided into 4 layers, the middle 1*26 is across the DC, and the DC subcarrier is the middle slot in the figure. The first layer is a 1*26 map, the second layer is a 2*26 and 1*26 map, the third layer is a 4*26 and 1*26 map, and the fourth layer is a 242 map. A 20 MHz subchannel allocation map can be used to combine any subchannels of the three layers into a spectrum or channel of 242 subcarrier sizes, and each user can only allocate one of the subchannels.

a possible trigger frame

How to indicate the subchannel resources for uplink OFDMA random access in the trigger frame is a special concern in this embodiment.

In a poor implementation, the common information portion of the trigger frame includes an indication information bit for indicating that all subchannels divided by the subchannel allocation field are used for random access. For example, referring to FIG. 8, if the bandwidth of the entire OFDMA transmission is 20 MHz, a total of 9 RUs are included. If The subchannel allocation field divides the 9 RUs on the 20 MHz bandwidth into 4 subchannels, occupying 2, 2, 1 and 4 RUs, respectively. When the indication information bit included in the trigger frame is 1, it indicates that the four subchannels are all used for random access, that is, four random access subchannels, occupying 2, 2, 1 and 4 RUs respectively. When the indication information bit is 0, it indicates that the four subchannels are not all used for random access, that is, partially used for random access or all cannot be used for random access.

In addition, in the poor implementation, the user information part of the trigger frame includes an indication information bit for each user (station or group of sites) for indicating that the subchannel corresponding to the user information part is available. For random access. As shown in FIG. 9, if the bandwidth of the entire OFDMA transmission is 20 MHz, a total of 9 RUs are included. If the subchannel allocation field divides the 9 RUs on the 20 MHz bandwidth into 4 subchannels, occupying 2, 2, 1 and 4 RUs respectively, the user information part of the trigger frame contains 4 pieces of user information. For each user information, the indication information bit of 1 indicates that the subchannel is used for random access, and the indication information bit of 0 indicates that the subchannel is not used for random access (ie, for scheduling transmission). As shown in FIG. 9, the first subchannel (occupying 2 RUs) and the third subchannel (accounting for 1 RU) are used for random access, and the remaining subchannels are used for scheduling transmission.

However, in the foregoing embodiment, the subchannel allocation field needs to occupy a large signaling overhead, and each subchannel needs to be separately indicated to indicate whether it is used for random access, and the efficiency is low.

Better trigger frame structure

Referring to FIG. 10a, a preferred trigger frame structure includes a first indication information I1 for indicating whether the trigger frame allows random access transmission. The first indication information I1, for example, is a trigger random access transmission indication bit, referred to as a TFR indicator bit. If the first indication information I1 is 1, the trigger frame allocates resources for random access; if the first indication information I1 is 0, the trigger frame does not allocate resources for random access (ie, all The transmission bandwidth is used to schedule transmissions). After receiving the trigger frame, the site needs to perform random access, but the TFR indicator bit is 0, and can stop reading subsequent information of the trigger frame, thereby reducing waste of processing resources of the site.

In addition to the first indication information I1, the trigger frame further includes second indication information I2, Indicates whether the entire transmission bandwidth is used for random access. The second indication information I2 is, for example, referred to as a “contention indication” indication bit, and the indication bit is 1 indicating that the entire transmission bandwidth is used for random access, and 0 indicates that the partial transmission channel is used for random access. In this way, two types of trigger frames that allow random access can be further distinguished, that is, the entire transmission bandwidth is used for random access and part of the transmission bandwidth is used for random access.

In this embodiment, referring to FIG. 10b, if the first indication information I1 is 1, and the second indication information I2 is also 1, then the entire transmission bandwidth is used for random access. In the trigger frame, the subchannel allocation information (located in the public information part) and the user information part are not included, so that communication resources can be further saved.

In addition, it should be noted that the first indication information I1 (TFR indication bit) may be included in the embodiment, and the second indication information I2 (contention indication indication bit) is not included. In other words, the TFR indicator bit and the contention indication indicator bit are not tightly coupled. In this case, TFR=1 indicates that the trigger frame allocates resources for random access; and TFR=0 indicates that the trigger frame does not allocate resources for random access, that is, all transmission bandwidths are used for scheduled transmission. . The first indication information I1 here is different from the function of indicating the information bits in the embodiment shown in FIG.

Better trigger frame structure 2

Referring to FIG. 11a, a trigger frame is used when the first indication information I1 (TFR indicator bit) is 1, and the second indication information I2 (contention indication indicator bit) is 0, that is, a part of the transmission channel used for random access. Trigger frame. Certainly, the specific indication frame may not include the first indication information I1 (TFR indication bit), or the second indication information I2 (contention indication indication bit), or the first indication information I1 (TFR indication) Bit) and second indication information I2 (contention indication indicator bit).

Specifically, the trigger frame sent by the AP includes a subchannel allocation field. Generally, the subchannel allocation field is used to indicate a plurality of subchannels into which the entire bandwidth is divided. Different from other implementation manners, the trigger frame includes third indication information I3, which is used to indicate the number of subchannels used for random access. It may be referred to as a random access subchannel information field "sub-channel number for random access".

In addition, the trigger frame may further include a fifth indication information I5, which is used to indicate the number N of RUs occupied by each random access subchannel, and may be referred to as a random access RU information field “RU number of random access sub-channel” ". Preferably, the value of N is 1 or 2 or 4 or 9.

In the embodiment of the present invention, the subchannel position for random access is relatively fixed, that is, a continuous RU occupying the beginning or the end of the entire frequency band. If the value of the random access subchannel information field "sub-channel number for random access" is M, and the value of the random access RU information field "RU number of random access sub-channel" is N, then it is used for random access. RU is the M*N RUs of the beginning or the end of the entire frequency band or channel. For example, in the example of FIG. 11a, three subchannels for random access are allocated in the trigger frame, and each random access subchannel occupies 1 RU. At this time, the RU used for random access is The first 3 RUs of the entire channel, or the 3 RUs at the end.

Alternatively, referring to FIG. 11b, in the embodiment, the trigger frame does not include the third sub-channel number for random access information field, but includes fourth indication information for indicating The total number of randomly accessed RUs may be referred to as the random access total RU information field "RU number for random access". That is, the trigger frame includes fourth indication information and the fifth indication information I5.

The station that receives the trigger frame determines a subchannel location for random access according to the foregoing trigger frame, and randomly accesses and transmits on the relevant subchannel. specific:

If the value of "RU number for random access" is T and the value of "RU number of random access sub-channel" is N, then the subchannel for random access occupies consecutive T RUs at the beginning or the end of the entire frequency band, If the RU used for random access includes a RU of a special location (such as the RU in the middle of the 20 MHz bandwidth shown in FIG. 3), the RU of the special location is regarded as a single random access subchannel; for other RUs, It is divided sequentially, each random access subchannel occupies consecutive N RUs, and if the remaining RUs are found to be insufficient to form a continuous N RUs in the process of partitioning, then it is regarded as an independent random access subchannel. .

Alternatively, the above-mentioned fifth indication information I5 (random access RU information field) may not be included in the trigger frame in FIG. 11a and FIG. 11b. At this time, the number of RUs occupied by each subchannel used for random access The default value is, for example, 1 RU or 2 RU.

It should be noted that, after a partial RU is allocated as a sub-channel for random access, the sub-channel allocation field in the common information part of the trigger frame may be allocated only for other RUs, for example, FIG. 11a has been used. There are 3 sub-channels that are indicated as random access. For a 20 MHz channel occupying 9 RUs, the sub-channel allocation field can occupy only 6 bits, that is, the allocation of the remaining 6 RUs can be realized, so that The signaling overhead of the subchannel allocation field is reduced to some extent.

Better trigger frame structure three

12a, 12b, a trigger frame when the first indication information I1 (TFR indicator bit) is 1, and the second indication information I2 (contention indication indicator bit) is 0, that is, when the partial transmission channel is used for random access Another trigger frame. Certainly, in the specific trigger frame, the first indication information I1 (TFR indication bit) or the second indication information I2 (contention indication indication bit) may not be included, or the first indication information I1 (TFR) is not included in the trigger frame. The indication bit) and the second indication information I2 (contention indication indicator bit).

Referring to FIG. 12a, the trigger frame sent by the AP includes a subchannel allocation field, which is used to indicate a number of subchannels into which the entire bandwidth is divided. Different from other embodiments, the sixth indication information I6 is included in the trigger frame, and is used to indicate which one (or which) of the subchannels divided by the subchannel allocation field is used for random access. . Specifically, it may be referred to as a random access subchannel location information field "sub-channel location for random access" in FIG. 12a, specifically indicating that the first subchannel is used for random access (I6-1). Alternatively, it may be referred to as a “sub-channel bitmap for random access” in FIG. 12b, and the bitmap is specifically used to indicate whether each subchannel is used for random access (I6- 2).

Taking FIG. 12a as an example, the AP divides the entire bandwidth (in the example of 20 MHz) into three subchannels by using a subchannel allocation field, and each subchannel occupies 4, 1, and 4 RUs, respectively. The value of the "sub-channel location for random access" information field is 3 (or binary representation is 011), indicating that the third subchannel is used for random access. Alternatively, in FIG. 12b, the AP divides the entire bandwidth (in the example of 20 MHz) into three subchannels by using a subchannel allocation field, and each subchannel occupies 4, 1, and 4 RUs, respectively. At this time, the value of the "sub-channel bitmap for random access" information field is "001", indicating that the third subchannel is used for random access.

In addition, the triggering frame may also include the fifth indication information I5 mentioned above as shown in FIGS. 12b and 12c for indicating the number of RUs occupied by each subchannel used for random access. The fifth indication information I5 shown in FIG. 12b and FIG. 12c has a number of RUs occupied by each subchannel for random access.

Of course, the fifth indication information I5 (random access RU information field) may be not included. In this case, the number of RUs occupied by each subchannel used for random access is a default value, for example, 1 RU.

Better trigger frame structure three a

In another preferred trigger frame structure, the common part of the trigger frame does not include subchannel allocation information, and the subchannel allocation information is located in the user information part, and the subchannel allocation information will be used to allocate a subchannel for the corresponding user. transmission.

When the trigger frame is used to trigger the uplink random access, a special AID (such as AID=0) may be used in the user information part of the trigger frame to indicate that the user information part will allocate one or more subchannels for random access. A separate indication may also be used to indicate that the user information portion will allocate one or more subchannels for random access. In order to flexibly indicate whether each of the minimum RUs is used for random access, a bitmap information may be included in the user information portion of the trigger frame, and the bitmap information may be the seventh indication information I7, the bitmap The information is used to indicate whether each minimum RU is used for random access, and 1 can be used to indicate that the corresponding minimum RU is used for random access. A 0 is used to indicate that the corresponding minimum RU is not used for random access. It can also be said that the embodiment does not limit this. In addition, the minimum RU refers to an RU including 26 subcarriers.

The length of the bitmap information is related to the bandwidth of the uplink multi-user transmission triggered by the trigger frame. If the uplink multi-user transmission bandwidth is 20 MHz and the uplink multi-user transmission includes 9 minimum RUs, the bitmap information is The length is 9 bits, and each bit indicates whether the corresponding RU is used for random access. If the bandwidth of the uplink multi-user transmission is larger, the length of the bitmap information is longer, which is equal to the number of minimum RUs included in the bandwidth of the uplink multi-user transmission. Specifically, the length of the bitmap information corresponding to 40 MHz is 18 bits, and the length of the bitmap information corresponding to 80 MHz is 37 bits, and the length of the bitmap information corresponding to 160 MHz is 74 bits. Optional, which can be in the user information. The part includes the eighth indication information I8, which is used to indicate the number of minimum RUs occupied by each random access subchannel. Referring to FIG. 12d, the trigger frame sent by the AP includes a public information part and a user information part, wherein the user information part includes a user identification AID, and the user identification AID is a special value (such as AID=0) indicating that the user information part is allocated. The subchannel is used for random access. When the AID is a special value, the user information part includes the seventh indication information I7, that is, the bitmap information, and specifically indicates whether each RU is used for random access by means of a bitmap.

Taking FIG. 12d as an example, taking a 20 MHz bandwidth as an example, a user information part of the trigger frame includes a special AID, indicating that the user information part contains bitmap information, and each bit in the bitmap is used to indicate each corresponding Whether RU is used for random access. Since the bandwidth is 20 MHz, the length of the bitmap is 9 bits. The value of the bitmap is 110101000, indicating that the 1, 2, 4, and 6 RUs are allocated for random access.

Since the bitmap has a large overhead when the bandwidth is large, such as a 160 MHz bandwidth, the bitmap has a length of 74 bits, so that the bitmap can be appropriately compressed to reduce the overhead. The hierarchical bitmap structure as follows can be used. The bitmap of the first layer may be in units of 20 MHz. When the bandwidth is 160 MHz, 8 bits may be used to indicate whether or not RUs of the corresponding 8 20 MHz are allocated for random access. It can be represented by 1 and 0 means no. The bitmap of the second layer can be corresponding to the corresponding one in the first layer bitmap. These 20 MHz are further indicated, and each 20 MHz corresponds to 9 bits, and each bit specifically indicates whether each RU is used for random access.

Taking FIG. 12da as an example, if the bandwidth is 160 MHz, the bitmap of the first layer is “10100000” indicating that RUs in the first and third 20 MHz are allocated for random access. The bitmap of the second layer is specifically indicated for the first and third 20 MHz. The bitmap of the second layer is "111101011110010000", indicating that the first, second, third, fourth, sixth, eighth, and nine RUs in the first 20 MHz and the first, second, and fifth RUs in the second 20 MHz are Allocation is used for random access.

In addition, the first layer bitmap and/or the second layer bitmap may also be replaced by an indication information field, respectively, indicating the number of 20 MHz including the random access RU and the random access for each 20 MHz. The number of RU. The specific location may be a number of consecutive 20 MHz and several RUs fixed in front.

Optionally, the indication information may be included in the trigger frame to indicate whether the layered bitmap is used. The indication information may be located in a common information part of the trigger frame or in a user information part.

For the preferred trigger frame structure three a, the user information part may not include the bitmap information, but includes the ninth indication information I9, and the I9 is used to indicate the number of RUs for random access. The RU for random access may be a consecutive number of RUs starting from the first RU, or may be consecutive RUs counting back from the last RU. Optionally, the 10th indication information I10 may be included in the user information part, where the I10 is used to indicate a starting position of the RU for random access. Optionally, the 8th indication information I8 may also be included in the user information part to indicate the number of minimum RUs occupied by each random access subchannel.

Referring to FIG. 12e, the trigger frame sent by the AP includes a public information part and a user information part, wherein the user information part includes a user identification AID, and the user identification AID is a special value (such as AID=0) indicating that the user information part is allocated. The subchannel is used for random access. When the AID is a special value, the user information part further includes a ninth indication information I9, and the I9 is used. Indicates the number of RUs used for random access. For example, the value of I9 is K indicating that the first K (or the last K) RUs are for random access.

For the preferred trigger frame structure threea, the above description provides two possible implementation manners, the first one uses bitmap information, and the second uses number information, as shown in Figure 12d and Figure 12e, respectively. Show. These two methods have their own advantages. The first one is more flexible and the second one is less expensive. In order to have the advantages of the two modes at the same time, the 11th indication information I11 may be included in the trigger frame to indicate whether the trigger frame is in the first embodiment or the second mode. The indication information I11 may be located in a common information part of the trigger frame or in a user information part.

Better trigger frame structure four

The trigger frame generated and transmitted by the AP includes a subchannel allocation field, which is used to indicate a number of subchannels obtained by dividing the entire bandwidth. The trigger frame further includes a user information portion for indicating, for a part of the foregoing allocated subchannels, information about which one or which users (sites or group groups) the subchannel will be used for, for which no allocation indication or scheduling indication is made. Part of the subchannel, the default is for random access transmission. In the embodiment of the present invention, the number of user information in the user information part is smaller than the number of subchannels in the subchannel allocation field, and those subchannels that are not allocated or instructing user information are defaulted to be used for random access. After receiving the trigger frame, the station parses the subchannel allocation field and the user information part, and if the station is assigned a subchannel, transmits on the allocated subchannel, if no subchannel is allocated, it needs to be randomly connected. When the transmission is performed, the subchannels to which the user information is not allocated may be randomly accessed for transmission.

In addition, optionally, the trigger frame (such as the common information part) further includes a fifth indication information I5, that is, a RU information of random access sub-channel, which is used to indicate each random connection. Number of RUs occupied by the incoming channel.

For example, referring to Figure 13, the subchannel allocation of the trigger frame is for a 20 MHz bandwidth (9 RUs). In the field, the entire bandwidth is divided into 4 subchannels, which occupy 2, 2, 1 and 4 RUs respectively. However, the user information part of the trigger frame has only 3 pieces of user information. Then, the receiving station confirms that the three pieces of user information in the user information part are user information for the first three subchannels according to the above trigger frame, and the fourth subchannel (including 4 RUs) is used for random access by default. If the value of the information field "RU number of random access sub-channel" is 2, the 4th subchannel will be further divided into 2 random access subchannels, and each random access subchannel occupies 2 RUs.

It should be noted that the TFR and contention indication in FIG. 13 are optional fields.

Better trigger frame structure five

Compared with the poor trigger frame shown in FIG. 8, referring to FIG. 14, the trigger frame transmitted by the AP (for example, the common information part) includes a subchannel allocation field, which is used to divide the entire channel into several subchannels. Or, to indicate a number of subchannels in which the entire channel is divided. In addition, a user information part is further included for indicating, for each subchannel allocated in the subchannel allocation field, whether it will schedule transmission or random access transmission, and information about which station or group of stations to transmit when scheduling transmission and corresponding The transmission parameter (ie, configuration information), the number of RUs occupied by each random access channel during random access transmission.

On the basis of this, the embodiment of the present invention provides that each user information part of the trigger frame may include a “sub-channel contention indication” indication bit to indicate whether the sub-channel is used for random access. In addition, for the sub-channel for random access, the user information part may include: a RU information of random access sub-channel, which is used to indicate the occupation of each random access channel. RU number. In this way, the RU information field of the random access subchannel can be used. When the number indicated by the information field is greater than 1, the subchannel is further divided into multiple random access subchannels, and the station is performing. The random access uses one of a plurality of random access subchannels for transmission. In addition, it can also be in the User Information Department. The sub-group includes a user group information field "group ID" for indicating a group of users that can perform random access on the corresponding sub-channel. In this way, users who perform random access are further clearly defined to avoid conflicts in which a large number of users participate in random access.

It should be noted that, referring to FIG. 14, the TFR and Contention Indication fields are optional fields.

It should be noted here that by carrying the "RU number for random access sub-channel" information field in the common information part or the user information part of the trigger frame, the scheduled transmission can be effectively aligned with the random access transmission. As shown in the following figure, in the long time occupied by scheduling transmission in (1), we can allocate fewer RUs to the random access channel, so that the random access transmission also takes a long time similar to the scheduled transmission; 2) The shorter time occupied by the scheduled transmission, we can allocate more RUs to the random access channel, so that the random access transmission also occupies a shorter time similar to the scheduled transmission, and if we give random access at this time If the channel is allocated less RUs, the random access transmission will take a long time. In order to achieve the alignment of the transmission, padding bits need to be added after the scheduling transmission, and part of the channel resources are wasted.

Better trigger frame structure six

The OFDMA transmission in the embodiment of the present invention may include multiple time periods, and frequency resources on each time period may be allocated to multiple users (sites or group of stations) for transmission. The foregoing various embodiments do not relate to the problem of the time period. In fact, the foregoing embodiments may also be applied to the case of multiple time periods, that is, the trigger frame includes an indication of the transmission time period and the corresponding time. An indication of the random access subchannel of the segment or the scheduled subchannel.

Specifically, the foregoing multiple transmission time periods and indications of corresponding communication resources may be implemented in multiple manners. For example, the trigger frame includes: the number of time segments in the current transmission, and the sequentially arranged indications of the random access subchannels or the scheduled subchannels for the respective time segments. Or the trigger frame includes: an identifier of a time period in the current transmission that is sequentially arranged, and an indication of the identified random access subchannel or the scheduled subchannel for the time period.

Referring to FIG. 15 , the AP sends a trigger frame, and triggers 5 STAs to transmit respectively in two time periods. The spectrum resources of the first time period are allocated to STA1 and STA2, and the spectrum resources of the second time period are allocated to STA3 and STA4. And STA5.

As already mentioned, for the resource indication mode of each time period, the preferred trigger frame structure mentioned above can be used to the preferred trigger frame structure 5, which will not be described here.

The above describes several preferred trigger frame structures. In the WLAN, 100 and AP generate and transmit the above trigger frame according to actual conditions. 200. The station receives the trigger frame and uses the communication resource indicated in the trigger frame for transmission. The sub-channel for random access indicated in the trigger frame may be randomly accessed by the station (if it is not scheduled), and if no other station is also connected, the sub-channel may be used to complete the communication. transmission.

Specifically, the process for the AP to generate and send the trigger frame according to the actual situation may include:

101. The AP determines the number of subchannels M for random access, or the AP determines the location of the subchannel used for random access, or the AP further determines the number of RUs required for each random access subchannel. (Or default to N RUs), generating a trigger frame based on the M or location determined above (or further based on N).

Optionally, referring to the preferred trigger frame structure, if the determined number of subchannels for random access is M>0, the “TFR” indication bit of the generated trigger frame is 1, otherwise the “TFR” indication bit is 0. . Of course, the "TFR" indicator bit may not be included.

Optionally, referring to the preferred trigger frame structure, if the determined number of subchannels for random access is M>0, and the subchannel used for random access occupies the entire transmission bandwidth, the generated trigger frame is The "contention indication" indicates that the bit is 1, otherwise the "contention indication" is 0. Of course, the "contention indication" indicator bit may not be included.

Optionally, referring to the preferred trigger frame structure 2, according to the number of subchannels M for random access, if M>0, the generated trigger frame includes a random access subchannel information field “sub-channel number for random access” ", and its value is M.

Optionally, referring to the preferred trigger frame structure 2, according to the number of subchannels M used for random access, the generated trigger frame includes a random access total RU information field “RU number for random access” T.

Optionally, referring to the preferred trigger frame structure 2, the generated trigger frame includes the “RU number of random access sub-channel” information field according to the number of RUs required for each random access subchannel, and Its value is N. The default triggering frame may not include the “RU number of random access sub-channel” if the default is required for each random access subchannel.

Optionally, referring to the preferred trigger frame structure 3, the AP includes a subchannel allocation field in the trigger frame (such as the common information part), and is used to indicate several subchannels of the entire bandwidth division; if M>0, the trigger frame includes Random access subchannel location information field "sub-channel location for random access" or random access subchannel bitmap information field "sub-channel bitmap for random" Access" indicates the location of the subchannel used for random access.

Optionally, referring to the preferred trigger frame structure 4, the AP includes a subchannel allocation field in the trigger frame (such as the common information part), and is used to indicate several subchannels of the entire bandwidth partition. The trigger frame further includes a user information portion for indicating which user's information transmission the subchannel will be used for for the aforementioned assigned subchannel. According to the number M of subchannels for random access determined by the AP, in general, the M subchannels from the back to the top of the plurality of subchannels allocated by the subchannel allocation field may be used for random access, for corresponding use. The subchannels that are randomly accessed do not make any indication in the user information part.

Optionally, referring to the preferred trigger frame structure, the AP includes a subchannel allocation field in the trigger frame (such as the common information part), and is used to indicate several subchannels of the entire bandwidth partition. The trigger frame further includes a user information portion for indicating which user's information transmission the subchannel will be used for for the aforementioned assigned subchannel. According to the location of the subchannel for random access determined by the AP, each user information part of the trigger frame includes a “sub-channel contention indication” indication bit, respectively, to indicate whether the subchannel is used for random access; According to the determined number of RUs (or defaults to N RUs) required for each random access subchannel, the user information part includes: the RU information field of the random access subchannel "RU number of random access sub- Channel", used to indicate the number of RUs occupied by each random access channel.

Specifically, the receiving, by the station, the transmission frame and using the communication resource indicated in the trigger frame for transmission may include:

For the STA that needs to transmit by the OFDMA random access, the triggering frame sent by the AP is read, and the location information of the subchannel available for random access indicated in the triggering frame is obtained, so as to be randomly accessed on the corresponding subchannel. And transfer. The process of random access is not the focus of this embodiment, and will not be described here. The process of obtaining the location information of the subchannels available for random access indicated in the trigger frame may have different processes depending on the structure of the trigger frame:

Optionally, refer to the preferred trigger frame structure one, 201, for random access through OFDMA The transmitting STA, after receiving the trigger frame, reads the "TFR" indication bit. If the indication bit is 1, the "contention indication" indication bit is further read.

202. If the “TFR” indication bit is 0, it indicates that the trigger frame does not allocate resources for random access, and does not continue to acquire random access information. If the "contention indication" indication bit is 1, if the indication bit is 0, it indicates that the trigger frame does not allocate resources for random access.

203. If the “contention indication” indication bit read in 201 is 1, that is, the entire transmission bandwidth is used for random access, then one subchannel may be randomly selected for random access. The specific location of the subchannel may be determined by referring to the number of RUs occupied by the subchannel (ie, "RU number of random access sub-channel" information field) or according to the number of RUs occupied by the default subchannel.

For example, taking the next-generation wifi standard as an example, in a 20 MHz bandwidth, the subchannel bandwidth occupied by each user is 1, 2, 4, or 9 RUs, so the value of N in step 203 is 1 or 2 or 4 or 9. In addition, according to the subchannel allocation information introduced above, the RUs of some special locations can only be used as one subchannel for transmission, for example, an intermediate RU within a 20 MHz bandwidth. Therefore, when determining the location of the random access subchannel, generally, the RU of the special location is used as a separate random access subchannel, and other RUs are determined according to the value of N. For example, if the information acquired by the station in steps 201-202 includes: L20MHz bandwidth is all used for random access, and each random access subchannel occupies 2 RUs (ie, N=2), then since 20MHz is known to be included RUs, and the intermediate RUs (5th RUs) can only be used as one subchannel for transmission. The other 8 RUs can be divided into 4 subchannels for random access according to N=2, that is, The location of the subchannel that can be used for random access is as shown in FIG. 15. The STA that requires random access randomly selects one subchannel for access in the five subchannels shown in FIG.

Optionally, referring to the preferred trigger frame structure 2, the STA reads the value M of the “sub-channel number for random access” information field in the trigger frame or further reads “RU number of random access sub-channel”. The value of the information field N (which may default to L), and determine the location of the subchannel for random access according to the M and N: the subchannel for random access occupies the beginning or the end of the entire frequency band (for example, 20 MHz) Continuous M*N RUs, and in which the first or the last number The i subchannels occupy the (i-1)*N+1th RU to the i*Nth RU.

Optionally, referring to the preferred trigger frame structure 2, the STA reads the “RU number for random access” T in the trigger frame, or further reads the value of the “RU number of random access sub-channel” information field. The default is L), and the location of the subchannel for random access is determined according to the M and N: the subchannel for random access occupies consecutive T RUs at the beginning or the end of the entire frequency band (for example, 20 MHz), if The RU for random access includes a RU of a special location (such as an intermediate RU of 20 MHz bandwidth), and the RU of the special location is regarded as a single random access subchannel; for other RUs, each random access sub The channel occupies consecutive N RUs. If the remaining RUs are found to be insufficient to form consecutive N RUs, the remaining RUs are regarded as independent random access subchannels.

Optionally, referring to the preferred trigger frame structure 3, the STA reads the “sub-channel location for random access” information field in the common information part of the trigger frame, or further according to the “RU number of random access sub-channel” information field. N (which may default to L) determines the location of the subchannel used for random access. Specifically, the STA determines each subchannel for random access according to the "sub-channel location for random access" information field, and obtains the location of its starting RU (the first RU of the subchannel). If the location of the starting RU of a subchannel allocated for random access is S, and the value of the "RU number of random access sub-channel" information field is N, then the first random access subchannel is occupied. From S+1 to S+N RUs, the second subchannel occupies the S+N+1 to S+2N RUs, and so on. If the i-th sub-channel occupies the S+(i-1)*N+1 RUs to the S+i*N RUs, and the remaining RU number is greater than 0 and less than N, then all remaining RUs are used as a random access. Subchannel.

Optionally, referring to the preferred trigger frame structure 4, the STA reads the subchannel allocation field in the trigger frame read trigger frame (for example, the common information part), and determines the subchannel position and the number of subchannels indicated by the field. The STA reads the user information part of the trigger frame, and determines how many pieces of user information the user information part contains. If the number of user information U included in the user information part is smaller than the number of sub-channels J divided by the sub-channel allocation field, the last J-U sub-channels are used for random access. Can enter one The step reads the "RU number of random access sub-channel" information field (which may default to L) to determine the location of the subchannel for random access. Specifically, the STA may determine the sum of the number of RUs occupied by the subchannels used for scheduling transmission according to the subchannel allocation field and the user information part. If the sum of the number of RUs occupied by the subchannel used for scheduling transmission is S, and the value of the "RU number of random access sub-channel" information field is N, then the first random access subchannel occupies the S+1 Up to S+N RUs, the second subchannel occupies the S+N+1 to S+2N RUs, and so on. If the i-th sub-channel occupies the S+(i-1)*N+1 RUs to the S+i*N RUs, and the remaining RU number is greater than 0 and less than N, then all remaining RUs are used as a random access. Subchannel.

Optionally, referring to the preferred trigger frame structure, the STA user information part that needs to be randomly accessed, and the sub-channel contention indication indication bit for the user information part corresponding to one subchannel, and Further "RU number of random access sub-channel" information field (located in the public information part or the user information part, or default to L), thereby determining the location of the subchannel for random access. Specifically, the STA reads all the user information parts, finds each subchannel for random access, and obtains the location of its starting RU. If the location of the starting RU of a subchannel allocated for random access is S, and the value of the "RU number of random access sub-channel" information field in the corresponding user information is N, then the first The random access subchannel occupies the S+1th to the S+Nth RUs, the second subchannel occupies the S+N+1th to the S+2Nth RUs, and so on. If the i-th sub-channel occupies the S+(i-1)*N+1 RUs to the S+i*N RUs, and the remaining RU number is greater than 0 and less than N, then all remaining RUs are used as a random access. Subchannel. For example, if the subchannel allocation field divides the entire bandwidth into 4 subchannels, each subchannel occupies 2, 2, 1 and 4 RUs respectively, and according to the indication of the indication information, the 1st and 4th subchannels For the random access, the value of the "RU number of random access sub-channel" information field in the user information corresponding to the first subchannel is "1", and the user information corresponding to the fourth subchannel is "RU number of random access sub". The value of the -channel" information field is 2, then the current allocation will generate 4 random access subchannels, the first random access subchannel occupies the first RU, and the second random access subchannel occupies the second RU, the third random access subchannel accounts for the 6th and 7th RUs, 4th The random access subchannels occupy the 8th and 9th RUs.

Optionally, referring to the preferred trigger frame structure, the STA that needs to be randomly accessed can read the information of the time period in the trigger frame, and the information of the subchannels of the random access for each time period, and confirm the corresponding time. The location of the random access subchannel of the segment selects a subchannel for random access to access in a subchannel that can be randomly accessed in a corresponding time period.

Correspondingly, another embodiment provides a resource indication processing device (not shown) applied to a wireless local area network employing OFDMA technology, including a processing unit configured to transmit or receive the foregoing embodiments. Trigger frame. For the structure and content of the specific trigger frame, reference may be made to the foregoing embodiments, and details are not described herein again. The processing unit may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or may implement or perform the embodiments of the present invention. Various methods, steps, and logic blocks are disclosed. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. It is easy to understand that the processing device of the foregoing resource indication may be located at an access point when specifically transmitting the trigger frame, and may be located at a site when specifically receiving the trigger frame.

Figure 17 is a block diagram of an access point in accordance with another embodiment of the present invention. The access point of Figure 17 includes an interface 101, a processing unit 102, and a memory 103. Processing unit 102 controls the operation of access point 100. Memory 103 can include read only memory and random access memory and provides instructions or data to processing unit 102. A portion of the memory 103 may also include non-volatile line random access memory (NVRAM). The various components of access point 100 are coupled together by a bus system 109, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as the bus system 109 in the figure.

The method for transmitting the foregoing various trigger frames disclosed in the foregoing embodiments of the present invention may be applied to the processing unit 102 or implemented by the processing unit 102. In the implementation process, the steps of the above method This can be done by an integrated logic circuit of hardware in the processing unit 102 or by instructions in software. The processing unit 102 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can be implemented or executed in an embodiment of the invention. Various methods, steps, and logic blocks of the disclosure. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 103, and the processing unit 102 reads the information in the memory 103 and completes the steps of the above method in combination with its hardware.

Figure 18 is a block diagram of a station in accordance with another embodiment of the present invention. The site of FIG. 18 includes an interface 111, a processing unit 112, and a memory 113. Processing unit 112 controls the operation of site 110. Memory 113 can include read only memory and random access memory and provides instructions and data to processing unit 112. A portion of the memory 113 may also include non-volatile line random access memory (NVRAM). The various components of the site 110 are coupled together by a bus system 119, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 119 in the figure.

The processing method for receiving the foregoing various trigger frames and according to the respective trigger frames disclosed in the foregoing embodiments of the present invention may be applied to the processing unit 112 or implemented by the processing unit 112. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processing unit 112 or an instruction in a form of software. The processing unit 112 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can be implemented or executed in an embodiment of the invention. Various methods, steps, and logic blocks of the disclosure. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. Software module can be bit In a random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers and the like in the field of mature storage media. The storage medium is located in the memory 113, and the processing unit 112 reads the information in the memory 113 and performs the steps of the above method in combination with its hardware.

Specifically, the memory 113 stores an instruction that causes the processing unit 112 to perform resource status information indicating a busy state of a sub-resource of a channel resource for which the access point performs data transmission with the station; sending to the access point Resource status information, so that the access point performs resource allocation according to resource status information.

It is to be understood that the phrase "one embodiment" or "an embodiment" or "an" Thus, "in one embodiment" or "in an embodiment" or "an" In addition, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In various embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be implemented in the embodiment of the present invention. Form any limit.

Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should be understood that in the embodiment of the present invention, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, for clarity of hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are implemented in hardware or software Line, depending on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. The computer readable medium includes a computer storage medium and a communication medium, wherein the communication medium includes a computer program for facilitating transfer from one location to another Any medium. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital STA line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

In summary, the above description is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A resource indication sending method includes:

The access point generates a trigger frame, where the trigger frame includes: a common information portion, the common information portion includes public information for all users, and the common information portion includes an indication of whether the trigger frame allows random access transmission Information (I1);

The access point sends the trigger frame.
A resource indication receiving method, including

The station receives a trigger frame, the trigger frame includes a common information portion, the common information portion includes common information for all users, and the common information portion includes information (I1) for indicating whether the trigger frame allows random access transmission. ;

When the station needs to perform random access transmission, the station uses the random access resource indicated by the trigger frame to perform random access transmission.
The method according to claim 1 or 2, wherein said common information portion comprises: information (I2) for indicating whether or not the entire transmission bandwidth is used for random access.
A method according to any one of claims 1 to 3, wherein

The information (I 1) for indicating whether the trigger frame allows random access transmission is 1, and the information (I2) for indicating whether the entire transmission bandwidth is used for random access is also 1, the public In the information part, subchannel allocation information is not included, and the user information part is not included in the trigger frame.
A method according to any one of claims 1 to 3, wherein

The trigger frame includes: the common information part includes subchannel allocation information, the subchannel allocation information is used to indicate a plurality of subchannels into which the entire bandwidth is divided; and the user information part located after the common information part, The user information part is configured to indicate, according to the subchannel indicated by the subchannel allocation field, configuration information of the subchannel.
A method according to any of claims 1-5,

The trigger frame further includes: an indication of a transmission time period.
A method according to any of claims 1-6,

The trigger frame is a physical layer trigger frame, and the trigger signaling of the trigger frame is located in the HE-SIG B of the physical layer preamble;

The trigger frame is a MAC layer trigger frame, and the trigger signaling of the trigger frame is located in a payload of the MPDU.
A resource indication sending method includes:

The access point generates a trigger frame, where the trigger frame includes: information (I3) indicating the number of subchannels used for random access;

The access point sends the trigger frame.
A resource indication sending method includes:

The access point generates a trigger frame, where the trigger frame includes: information (I4) indicating a total number of resource units RU for random access;

The access point sends the trigger frame.
A resource indication receiving method, including

The station receives a trigger frame, where the trigger frame includes: information (I3) indicating the number of subchannels used for random access;

When the station needs to perform random access transmission, the station uses the random access resource indicated by the trigger frame to perform random access transmission.
A resource indication receiving method, including

The station receives a trigger frame, where the trigger frame includes: information (I3) indicating the number of subchannels used for random access;

When the station needs to perform random access transmission, the station uses the random access resource indicated by the trigger frame to perform random access transmission.
A method according to any of claims 7-11, comprising:

The trigger frame includes: information indicating the number of RUs occupied by each random access subchannel (I5)

or,

The number of RUs occupied by each random access subchannel is a default value, and information (I5) indicating the number of RUs occupied by each random access subchannel is not included in the trigger frame.
A method according to any of claims 7-12, comprising one or a combination of the following:

The trigger frame includes: indicating whether the trigger frame allows random access transmission (I1); or

The trigger frame includes: information (I2) for indicating whether the entire transmission bandwidth is used for random access.
A method according to any of claims 7-13, comprising:

The trigger frame includes: a first subchannel allocation field, configured to only information about a subchannel into which the RU other than the resource block RU for the random access has been indicated by the trigger frame.
A method according to any of claims 7-13, comprising:

The trigger frame includes: a second subchannel allocation field, where the subchannel allocation field is used to indicate information of a subchannel into which the entire bandwidth is divided.
A method according to any of claims 7-15,

The trigger frame further includes: an indication of a transmission time period.
A method according to any of claims 7-16,

The trigger frame is a physical layer trigger frame, and the trigger signaling of the trigger frame is located in the HE-SIG B of the physical layer preamble;

The trigger frame is a MAC layer trigger frame, and the trigger signaling of the trigger frame is located in a payload of the MPDU.
A resource indication sending method includes:

The access point generates a trigger frame, the trigger frame includes a public information portion, and the public information portion includes public information for all users;

The common information part includes: a subchannel allocation field, configured to indicate a plurality of subchannels into which the entire bandwidth is divided; and a subletter for indicating the subchannel allocation field Information (I6) of the subchannel used for random access in the track;

The access point sends the trigger frame.
A resource indication receiving method, including

The station receives a trigger frame, the trigger frame includes a public information portion, and the public information portion includes public information for all users;

The common information part includes: a subchannel allocation field, which is used to indicate a plurality of subchannels into which the entire bandwidth is divided;

Information (I6) for indicating a subchannel for random access in a subchannel divided by the subchannel allocation field;

When the station needs to perform random access transmission, the station uses the random access resource indicated by the trigger frame to perform random access transmission.
A method according to claim 18 or 19, comprising:

The information used to indicate the subchannel for random access in the subchannel divided by the subchannel allocation field is: information indicating that the first subchannel is used for random access (I6-1) Or, information indicating whether each subchannel is used for random access (I6-2).
A method according to any of claims 18-20, comprising:

The trigger frame includes: information (I5) indicating the number of RUs occupied by each random access subchannel;

or,

The number of RUs occupied by each random access subchannel is a default value.
A method according to any of claims 18-19, comprising:

The trigger frame includes: indicating whether the trigger frame allows random access transmission (I1); or the trigger frame includes: information (I2) for indicating whether the entire transmission bandwidth is used for random access.
A method according to any of claims 18-22,

The trigger frame further includes: an indication of a transmission time period.
A resource indication sending method includes:

The access point generates a trigger frame, the trigger frame includes: a public information part and a user information part; the common information part includes public information for all users, and the common information part includes a subchannel allocation field for indicating that the whole a plurality of subchannels into which the bandwidth is divided;

The user information part is configured to indicate, for the partial subchannel indicated by the subchannel allocation field, configuration information of each subchannel in the partial subchannel; wherein the subchannel allocation field indicates multiple sub In the channel, there is no remaining subchannel indicating configuration information in the user information part, and is used for random access;

The access point sends the trigger frame.
A resource indication receiving method, including

The station receives a trigger frame, the trigger frame including a public information portion and a user information portion located after the public information portion;

The common information portion includes public information for all users, and the common information portion includes: a subchannel allocation field for indicating a plurality of subchannels into which the entire bandwidth is divided;

The user information portion is configured to indicate, for the partial subchannel indicated by the subchannel allocation field, configuration information of each of the partial subchannels; wherein the subchannels indicated by the subchannel allocation field are multiple subchannels The remaining subchannels of the configuration information are not indicated in the user information part, and are used for random access;

When the station needs to perform random access transmission, the station uses the random access resource indicated by the trigger frame to perform random access transmission.
A method according to claim 24 or 25, comprising:

The trigger frame includes: information indicating the number of RUs occupied by each random access subchannel (I5)

or,

The number of RUs occupied by each random access subchannel is a default value.
A method according to any of claims 24-25, comprising:

The trigger frame includes: indicating whether the trigger frame allows random access transmission (I1); or

The trigger frame includes: information (I2) for indicating whether the entire transmission bandwidth is used for random access.
A method according to any of claims 24-25,

The trigger frame further includes: an indication of a transmission time period.
A resource indication sending method includes:

The access point generates a trigger frame, where the trigger frame includes: a public information part and a user information part located after the public information part;

The common information portion includes public information for all users, and the common information portion includes a subchannel allocation field for indicating a plurality of subchannels into which the entire bandwidth is divided;

The user information part is configured to, for each subchannel allocated in a subchannel allocation field, indicate that each of the subchannels is to be used for scheduling transmission or for random access transmission, and includes: the scheduling transmission Configuration information of the subchannel, or the number of RUs occupied by the subchannel for random access when the random access transmission is used;

The access point sends the trigger frame.
A resource indication receiving method, including

The site receives the trigger frame,

The trigger frame includes: a public information portion and a user information portion located after the public information portion;

The common information portion includes public information for all users, and the common information portion includes a subchannel allocation field for indicating a plurality of subchannels into which the entire bandwidth is divided;

The user information part is configured to, for each subchannel allocated in a subchannel allocation field, indicate that each of the subchannels is to be used for scheduling transmission or for random access transmission, and includes: the scheduling transmission Configuration information of the subchannel, or the number of RUs occupied by the subchannel for random access when the random access transmission is used;

When the station needs to perform random access transmission, the station uses the random access resource indicated by the trigger frame to perform random access transmission.
A method according to claim 29 or 30, comprising:

The number of RUs occupied by each random access channel for random access transmission is greater than one.
A method according to any of claims 29-30, comprising:

The user information part further includes: information indicating a group of users that can perform random access on a subchannel used for random access transmission.
A method according to any of claims 29-30, comprising:

The trigger frame includes: indicating whether the trigger frame allows random access transmission (I1); or

The trigger frame includes: information (I2) for indicating whether the entire transmission bandwidth is used for random access.
A method according to any of claims 29-30,

The trigger frame further includes: an indication of a transmission time period.
A processing device applied to a wireless local area network,

The module is configured to receive a trigger frame, where the trigger frame includes: information (I1) for indicating whether the trigger frame allows random access transmission;

And a module for performing random access transmission by using the random access resource indicated by the trigger frame when a random access transmission is required.
The apparatus according to claim 35, wherein said trigger frame comprises: indicating whether the entire transmission bandwidth is used for random access (I2).
The apparatus according to any one of claims 35 or 36, wherein the information (I1) for indicating whether the trigger frame allows random access transmission or the indicating whether the entire transmission bandwidth is used for random access ( I2) is located in the common information part of the trigger frame.
A device according to any of claims 35-37,

The trigger frame further includes: an indication of a transmission time period.
A processing device applied to a wireless local area network,

The module is configured to: generate a trigger frame, where the trigger frame includes: information indicating a quantity of a subchannel used for random access (I3); or, indicating a resource unit used for random access Information on the total number of RUs (I4);

A module for transmitting the trigger frame.
A processing device applied to a wireless local area network,

The module is configured to: receive a trigger frame, where the trigger frame includes: information indicating a quantity of a subchannel used for random access (I3); or, indicating a resource unit used for random access Information on the total number of RUs (I4);

A module for performing random access transmission using a random access resource indicated by the trigger frame when a random access transmission is required.
The apparatus according to claim 39 or 40, comprising:

The trigger frame includes: information indicating the number of RUs occupied by each random access subchannel (I5)

or,

The number of RUs occupied by each random access subchannel is a default value.
Apparatus according to any of claims 39-41 comprising:

The trigger frame includes: indicating whether the trigger frame allows random access transmission (I1); or

The trigger frame includes: information (I2) for indicating whether the entire transmission bandwidth is used for random access.
Apparatus according to any of claims 39-42 comprising:

The trigger frame includes: a subchannel allocation field, configured to perform a subchannel allocation indication only for an RU other than the RU for random access that has been indicated by the trigger frame.
A device according to any of claims 39-42,

The trigger frame further includes: an indication of a transmission time period.
A processing device applied to a wireless local area network,

The module is configured to: generate a trigger frame, where the trigger frame includes: a subchannel allocation field, configured to indicate multiple subchannels into which the entire bandwidth is divided; and, used to indicate that the subchannel allocation field is divided Information (I6) of the subchannel for random access in the subchannel;

A module for transmitting the trigger frame.
A processing device applied to a wireless local area network,

The module is configured to receive a trigger frame, where the trigger frame includes: a subchannel allocation field, configured to indicate multiple subchannels into which the entire bandwidth is divided; and, used to indicate that the subchannel allocation field is divided. Information (I6) of the subchannel for random access in the subchannel;

A module for performing random access transmission using a random access resource indicated by the trigger frame when a random access transmission is required.
The device according to claim 45 or 46, comprising:

The information used to indicate the subchannel for random access in the subchannel divided by the subchannel allocation field is: information indicating that the first subchannel is used for random access (I6-1) Or, information indicating whether each subchannel is used for random access (I6-2).
Apparatus according to any of claims 45-47 comprising:

The trigger frame includes: information (I5) indicating the number of RUs occupied by each random access subchannel;

or,

The number of RUs occupied by each random access subchannel is a default value.
Apparatus according to any of claims 45-48 comprising:

The trigger frame includes: indicating whether the trigger frame allows random access transmission (I1); or the trigger frame includes: information (I2) for indicating whether the entire transmission bandwidth is used for random access.
A device according to any of claims 45-49,

The trigger frame further includes: an indication of a transmission time period.
A processing device applied to a wireless local area network,

The module is configured to generate a trigger frame, where the trigger frame includes: a subchannel allocation field, configured to indicate a plurality of subchannels into which the entire bandwidth is divided; and a user information portion, configured to allocate the subchannels a partial subchannel indicated by the field, indicating configuration information of each of the partial subchannels; wherein, among the plurality of subchannels indicated by the subchannel allocation field, there is no configuration information indicating the configuration information in the user information part The remaining partial subchannels are used for random access;

A module for transmitting the trigger frame.
A processing device applied to a wireless local area network,

And configured to: receive a trigger frame, the trigger frame includes: a subchannel allocation field, configured to indicate a plurality of subchannels into which the entire bandwidth is divided; and a user information portion, configured to allocate the subchannel a partial subchannel indicated by the field, indicating configuration information of each of the partial subchannels; wherein, among the plurality of subchannels indicated by the subchannel allocation field, there is no configuration information indicating the configuration information in the user information part The remaining partial subchannels are used for random access;

A module for performing random access transmission using a random access resource indicated by the trigger frame when a random access transmission is required.
The apparatus according to claim 51 or 52, comprising:

The trigger frame includes: information indicating the number of RUs occupied by each random access subchannel (I5)

or,

The number of RUs occupied by each random access subchannel is a default value.
Apparatus according to any of claims 51-53 comprising:

The trigger frame includes: indicating whether the trigger frame allows random access transmission (I1); or

The trigger frame includes: information (I2) for indicating whether the entire transmission bandwidth is used for random access.
A device according to any of claims 51-54,

The trigger frame further includes: an indication of a transmission time period.
A processing device applied to a wireless local area network,

The module is configured to generate a trigger frame, where the trigger frame includes: a subchannel allocation field, which is used to indicate multiple subchannels into which the entire bandwidth is divided; and a user information part, which is used in the subchannel allocation field. Each of the allocated subchannels indicates that each of the subchannels will schedule transmission or random access transmission, and configuration information for scheduling transmission, or each random access channel for random access transmission The number of RUs occupied;

A module for transmitting the trigger frame.
A processing device applied to a wireless local area network,

The module is configured to receive a trigger frame, where the trigger frame includes: a subchannel allocation field, which is used to indicate multiple subchannels into which the entire bandwidth is divided; and a user information part, which is used in the subchannel allocation field. Each of the allocated subchannels indicates that each of the subchannels will schedule transmission or random access transmission, and configuration information for scheduling transmission, or each random access channel for random access transmission The number of RUs occupied;

A module for performing random access transmission using a random access resource indicated by the trigger frame when a random access transmission is required.
The apparatus according to claim 56 or 57, comprising:

The number of RUs occupied by each random access channel for random access transmission is greater than one.
A method according to any of claims 56-58, comprising:

The user information part further includes: information indicating a group of users that can perform random access on a subchannel used for random access transmission.
Apparatus according to any of claims 56-59 comprising:

The trigger frame includes: indicating whether the trigger frame allows random access transmission (I1); or,

The trigger frame includes: information (I2) for indicating whether the entire transmission bandwidth is used for random access.
A device according to any of claims 56-60,

The trigger frame further includes: an indication of a transmission time period.