CN107027133B

CN107027133B - Method for processing information, first access point and first station

Info

Publication number: CN107027133B
Application number: CN201610070499.2A
Authority: CN
Inventors: 杨智策; 张黔; 马驰翔
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-01-29
Filing date: 2016-01-29
Publication date: 2020-04-03
Anticipated expiration: 2036-01-29
Also published as: CN111510936B; CN111510936A; CN107027133A

Abstract

In the method, if the BSSID of the BSS where the station is located is different from the BSSID in the received PPDU and the BSS Color of the BSS where the station is located is the same as the BSS Color in the received PPDU, the station determines that the BSS Color conflict occurs, and then the BSS Color conflict is solved by replacing a channel used by the station or replacing the BSS Color of the BSS where the station is located. Whether BSS Color conflict occurs or not is detected, the generated BSS Color conflict is solved, the reduction of space reuse rate (concurrent transmission opportunity) is avoided, and the performance of a wireless network is further reduced.

Description

Method for processing information, first access point and first station

Technical Field

The present invention relates to the field of computers, and in particular, to a method for processing information, a first access point, and a first station.

Background

In a WLAN (chinese: Wireless Local Area Network, english: Wireless Local Area Network), a plurality of Wireless devices are associated to an AP (chinese: Access Point), and form a BSS (chinese: Basic Service Set, english: Basic Service Set). The AP controls a data transmission process in the entire BSS, and a two-layer address of the AP is used as a BSSID (chinese: basic service set identifier; english: BSS Identity), where the two-layer address is generally an MAC (chinese: Media Access Control; english: Media Access Control) address. An OBSS (chinese: Overlapping BSS; english: Overlapping BSS) is a BSS that at least partially overlaps with the present BSS.

The BSS Color (i.e., BSS Color) is a field in the physical layer of the wireless data packet, and is associated with the wireless devices of the same AP, and the same BSS Color is used in the wireless data packet.

Since the bit number of the BSS Color is smaller than that of the BSSID in the current wireless network protocol, the BSS and the OBSS may select the same BSS Color and trigger BSS Color collision.

A wireless device with BSS Color collision cannot adjust its CCA (chinese: Clear Channel Assessment) policy according to the BSS Color, which results in a decrease in spatial multiplexing rate (concurrent transmission opportunity), and thus a decrease in wireless network performance.

Disclosure of Invention

Embodiments of the present invention provide a method for processing information, a first access point, and a first station, which are used to detect whether a BSS Color conflict occurs and solve the occurring BSS Color conflict, so as to avoid a decrease in spatial reuse rate (concurrent transmission opportunity), and further reduce wireless network performance.

A first aspect of an embodiment of the present invention provides a method for processing information, where the method includes:

a first Access Point (AP) receives a physical layer convergence process PLCP Protocol Data Unit (PPDU), wherein the color of a BSS (base service set) where the first AP is located is the color of a first BSS, an identifier of the BSS where the first AP is located is a first BSSID, an HE-SIG-A field of a PLCP header contained in the PPDU contains a second BSS color, and a Media Access Control (MAC) header contained in the PPDU contains a second BSSID;

the first AP determining that the first BSS color is the same as the second BSS color and that the first BSSID is different from the second BSSID;

the first AP changes a channel currently used by the first AP to another available channel, or the first AP changes the first BSS color to another BSS color, where the another available channel is different from the channel currently used by the first AP, and the another BSS color is different from the first BSS color.

The method realizes the detection of whether the BSS Color conflict occurs or not and the resolution of the occurring BSS Color conflict, avoids the reduction of the space reuse rate (concurrent transmission opportunity), and further reduces the performance of the wireless network.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining, by the first AP, that the first BSSID is different from the second BSSID includes:

the first AP determines that the first BSSID is different from a sending address TA in the received downlink single-user PPDU; or

And the first AP determines that the first BSSID is different from a receiving address RA in the received uplink single-user PPDU.

On one hand, the BSS AP and the OBSS AP can hear each other, and under the condition that the AP of the BSS receives the SU downlink packet, the BSSID of the BSS AP and the BSS ID of the OBSS AP are determined to be different conveniently and rapidly through the sending address. On the other hand, the BSS AP and the OBSS STA can hear each other, and under the condition that the AP of the BSS receives the SU uplink packet, the BSSID of the BSS AP and the BSSID of the OBSS AP are determined to be different conveniently and rapidly through the receiving address.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the determining, by the first AP, that the first BSSID is different from the second BSSID includes:

the first AP determines that the first AP does not send the downlink multi-user PPDU, and receives downlink multi-user PPDUs sent by other APs, wherein the other APs are different from the first AP.

The BSS AP and the OBSS AP can hear each other, and under the condition that the AP of the BSS receives the MU downlink packet, whether the BSS AP sends downlink multi-user PPDU or not is judged conveniently and rapidly that the BSSID of the BSS AP and the BSSID of the OBSS AP are different.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the determining, by the first AP, that the first BSSID is different from the second BSSID includes:

and the first AP determines that the first AP does not send a trigger frame TF and receives an uplink multi-user PPDU sent by the station STA.

The BSS AP and the OBSS STA can hear each other, and under the condition that the AP of the BSS receives the MU uplink packet, whether the trigger frame is sent or not is determined through the BSS AP, so that the BSSID of the BSS AP and the BSSID of the OBSS AP are different conveniently and quickly.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the replacing, by the first AP, a channel currently used by the first AP with another available channel includes:

the first AP determines a Received Signal Strength Indication (RSSI) according to the received PPDUs sent by other APs, wherein the other APs are different from the first AP;

and if the RSSI is greater than a preset threshold value, the first AP changes the channel currently used by the first AP into other available channels.

When the interference between the BSS AP and the OBSS AP is serious, the BSS color conflict is solved by changing the channel, so that the serious reduction of the space reuse rate (concurrent transmission opportunity) is avoided, and the performance of a wireless network is further seriously reduced.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the replacing, by the first AP, the first BSS color with another BSS color includes:

if the RSSI is not greater than the predetermined threshold, the first AP changes the first BSS color to other BSS colors.

When the interference between the BSS AP and the OBSS AP is slight, the BSS Color conflict is solved by replacing the BSS Color, and the BSS Color conflict is quickly solved.

A second aspect of the embodiments of the present invention provides a method for processing information, where the method includes:

a first Access Point (AP) receives a PLCP Protocol Data Unit (PPDU) in an uplink multi-user physical layer convergence process, wherein the color of a BSS where the first AP is located is a first Basic Service Set (BSS) color, an identifier of the BSS where the first AP is located is a first BSSID, an HE-SIG-A field of a PLCP head contained in the uplink multi-user PPDU contains a second BSS color, and the HE-SIG-A field of the PLCP head contained in the uplink multi-user PPDU carries a part of a second BSSID;

the first AP determining that the first BSS color is the same as the second BSS color and that a portion of the second BSSID carried by the HE-SIG-A field does not match the first BSSID;

and the first AP changes the color of the first BSS into the color of other BSSs, wherein the colors of the other BSSs are different from the color of the first BSS.

The BSS AP and the OBSS STA can hear each other, the AP of the BSS can detect whether BSS Color conflict occurs or not and solve the occurring BSS Color conflict under the condition that the AP of the BSS receives the MU uplink packet, the reduction of space reuse rate (concurrent transmission opportunity) is avoided, and the performance of a wireless network is further reduced.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the causing a field HE-SIG-a of a PLCP header included in the uplink multi-user PPDU to carry a part of the second BSSID includes:

and a field reserved in an HE-SIG-A field of a PLCP header contained in the uplink multi-user PPDU represents a part of the second BSSID.

Fields reserved in HE-SIG-A fields of PLCP heads contained in the uplink multi-user PPDU carry part of BSSIDs, so that whether BSS Color conflicts occur or not is determined in an auxiliary mode, all fields in the uplink multi-user PPDU are fully utilized, and the utilization rate of transmission data is improved.

A third aspect of the embodiments of the present invention provides a method for processing information, where the method includes:

a first station STA receives a physical layer convergence process PLCP protocol data unit PPDU, the BSS color of the first STA is a first basic service set BSS color, the identifier of the BSS of the first STA is a first basic service set identifier BSSID, an HE-SIG-A field of a PLCP header contained in the PPDU contains a second BSS color, and a media access control MAC header contained in the PPDU contains a second BSSID;

the first STA determining that the first BSS color is the same as the second BSS color and that the first BSSID is different from the second BSSID;

and the first STA receives and transmits data according to a strategy that the data transmission and reception of the node which transmits the PPDU do not interfere with each other, or the first STA informs the AP associated with the first STA that BSS color conflict occurs.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the determining, by the first STA, that the first BSSID is different from the second BSSID includes:

the first STA determines that the first BSSID is different from a sending address TA in the received downlink single-user PPDU; or

And the first STA determines that the first BSSID is different from a receiving address RA in the received uplink single-user PPDU.

On one hand, the BSS STA and the OBSS AP can hear each other, and under the condition that the STA of the BSS receives the SU downlink packet, the BSSID difference between the BSS AP and the OBSS AP is conveniently and rapidly determined through the sending address. On the other hand, the BSS STA and the OBSS STA can hear each other, and under the condition that the STA of the BSS receives the SU uplink packet, the BSSID of the BSS STA and the BSSID of the OBSS STA are determined to be different conveniently and rapidly through the receiving address.

A fourth aspect of the present invention provides a method for processing information, where the method includes:

a first station STA receives a PLCP protocol data unit PPDU in an uplink multi-user physical layer convergence process, wherein the color of a BSS where the first STA is located is a first basic service set BSS color, an identifier of the BSS where the first STA is located is a first basic service set identifier BSSID, an HE-SIG-A field of a PLCP head contained in the uplink multi-user PPDU contains a second BSS color, and the HE-SIG-A field of the PLCP head contained in the uplink multi-user PPDU carries a part of the second BSSID;

the first STA determining that the first BSS color is the same as the second BSS color and that a portion of the second BSSID carried by the HE-SIG-A field does not match the first BSSID;

The BSS STA and the OBSS STA can hear each other, whether BSS Color conflict occurs or not is detected and the occurring BSS Color conflict is solved under the condition that the STA of the BSS receives the MU uplink packet, the reduction of space reuse rate (concurrent transmission opportunity) is avoided, and then the performance of a wireless network is reduced.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the enabling the HE-SIG-a field of the PLCP header included in the uplink multi-user PPDU to carry a part of the second BSSID includes:

A fifth aspect of the embodiments of the present invention provides a first access point AP, including units for executing the method for processing information in the first aspect or the second aspect.

A sixth aspect of the present invention provides a first station STA, including units configured to execute the information processing method in the third aspect or the fourth aspect.

A seventh aspect of the present embodiment provides a first access point AP, including:

the device comprises a receiver, a memory and a processor, wherein the processor is connected with the memory and the receiver through a bus;

the receiver is used for receiving a PLCP protocol data unit PPDU in a multi-user physical layer convergence process;

the memory is used for storing instructions executed by the processor;

the processor is configured to execute the instructions, and when the instructions are executed by the processor, the processor performs the method of processing information of the first aspect or the second aspect.

An eighth aspect of the present invention provides a first station STA, including:

the memory is used for storing instructions executed by the processor;

the processor is configured to execute the instructions, and when the instructions are executed by the processor, the processor performs the method of processing information of the third aspect or the fourth aspect.

One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

the embodiment of the invention provides that the station compares the BSSID of the BSS where the station is located with the BSSID in the received PPDU, compares the BSScolor of the BSS where the station is located with the BSScolor in the received PPDU, determines that the BSS Color conflict occurs if the BSSID of the BSS where the station is located is different from the BSSID in the received PPDU and the BSScolor of the BSS where the station is located is the same as the BSS Color in the received PPDU, and further solves the occurred BSS Color conflict by replacing a channel used by the station or the BSS Color of the BSS where the station is located. Whether BSS Color conflict occurs or not is detected, the generated BSS Color conflict is solved, the reduction of space reuse rate (concurrent transmission opportunity) is avoided, and the performance of a wireless network is further reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic diagram of an AP1 in the BSS and an AP2 in the OBSS being able to hear each other;

fig. 2 is a schematic diagram of the AP1 in the BSS and the STA in the OBSS being able to hear each other;

fig. 3 is a schematic diagram of the STA in the BSS and the AP2 in the OBSS being able to hear each other;

fig. 4 is a schematic diagram of the mutual hearing of STA1 in the BSS and STA2 in the OBSS;

FIG. 5 is a schematic diagram of the structure of a PPDU;

FIG. 6 is a diagram illustrating the structure of HE-SIG-A fields in an uplink MU PPDU and a downlink MU PPDU in the prior art;

FIG. 7 is a diagram illustrating a structure of an HE-SIG-A field of a PLCP header included in an uplink multi-user PPDU according to an embodiment of the present invention;

FIG. 8 is a flow chart of a method of processing information according to an embodiment of the present invention;

FIG. 9 is another flow chart of a method of processing information according to an embodiment of the present invention;

fig. 10 is a block diagram of a first AP according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a first AP according to an embodiment of the present invention;

fig. 12 is a block diagram of a first STA according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a first STA according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto.

First, a case where BSS Color collision occurs will be described. According to the different interference degree of the conflicting OBSS to the BSS, the BSS Color conflict can be divided into the following four conditions:

1) the AP in the BSS and the AP in the OBSS can hear each other, that is: the AP transmitting and receiving data in the BSS and the AP transmitting and receiving data in the OBSS interfere with each other;

2) the AP in the BSS and the STA in the OBSS can hear each other, that is: the AP transceiving data in the BSS and the STA transceiving data in the OBSS interfere with each other;

3) the STA in the BSS and the AP in the OBSS can hear each other, that is: the data received and transmitted by the STA in the BSS and the data received and transmitted by the AP in the OBSS are mutually interfered;

4) the STAs in the BSS and the OBSS can hear each other, that is: the data received and transmitted by the STA in the BSS and the data received and transmitted by the STA in the OBSS interfere with each other.

For example, assume that the range in which a wireless signal transmitted by an AP in a BSS can be received by a STA or other AP is: the area covered by a circle with the AP as the center and r as the radius, and the range within which the wireless signal transmitted by the STA in the BSS can be received by the AP or other STAs is: and the area covered by a circle with the STA as the center and r as the radius. Namely: the maximum communication distance (communication distance) of an AP or STA in the BSS is r.

Referring to fig. 1-4, the range in which the wireless signal transmitted by the AP1 in the BSS of fig. 1-4 can be received by the STA or other APs is: the OBSS partially overlaps with the BSS in an area covered by a circle with r as a radius (i.e., an area covered by a solid circle in fig. 1-4) with the AP1 as a center, and a range within which a wireless signal transmitted by the AP2 in the OBSS can be received by the STA or other APs is: the area covered by a circle with radius r (i.e., the area covered by the dashed circle in fig. 1-4) centered at AP 2.

As shown in fig. 1, since the AP2 in the OBSS is located in a region covered by a circle with a radius of r (i.e., a region covered by a circle with a solid line in fig. 1) centered at the AP1 in the OBSS, and the AP1 in the OBSS is located in a region covered by a circle with a radius of r centered at the AP2 in the OBSS (i.e., a region covered by a circle with a dashed line in fig. 1), the AP1 in the BSS and the AP2 in the OBSS can hear each other.

As shown in fig. 2, since the STAs in the OBSS are located in the area covered by the circle with radius r (i.e., the area covered by the solid-line circle in fig. 2) centered at the AP1 in the BSS, and the AP1 in the BSS is located in the area covered by the circle with radius r centered at the STA in the OBSS (i.e., the area covered by the dotted-line circle in fig. 2), the AP1 in the BSS and the STAs in the OBSS can hear each other.

As shown in fig. 3, since the AP2 in the OBSS is located in an area covered by a circle with a radius of r (i.e., an area covered by a two-dot chain line circle in fig. 3) centered on the STA in the OBSS, and the STA in the OBSS is located in an area covered by a circle with a radius of r centered on the AP2 in the OBSS (i.e., an area covered by a dashed circle in fig. 3), the STA in the OBSS and the AP2 in the OBSS can hear each other.

As shown in fig. 4, since STA2 in the OBSS is located in an area covered by a circle with r as a radius (i.e., an area covered by a dotted circle in fig. 4) centered on STA1 in the BSS, and STA1 in the BSS is located in an area covered by a circle with r as a radius (i.e., an area covered by a two-dot chain line circle in fig. 4) centered on STA2 in the OBSS, STA1 in the BSS and STA2 in the OBSS can hear each other.

How to determine whether the BSS Color collision occurs and how to solve the BSS Color collision that occurs in the above four cases will be described below, respectively.

First, a basic concept in the embodiment of the present invention will be explained.

1) PPDU (chinese: a PLCP protocol data unit; english: PLCP Protocol Data Unit), in which PLCP (chinese: a physical layer convergence process; english: physical Layer conversion Procedure). Data mutually transmitted between the AP and the STA in the BSS is encapsulated in the PPDU.

The structure of the PPDU is shown in fig. 5, and the PPDU includes three fields: a PLCP Preamble (PLCP Preamble), a PLCP Header (PLCP Header), and an MPDU (chinese: media access control protocol Data Unit; english: MAC protocol Data Unit) or a PSDU (chinese: PLCP Service Data Unit; english: PLCP Service Data Unit).

Wherein the PLCP header comprises: an HE-SIG-a field and an HE-SIG-B field. The HE-SIG-a field includes a BSS Color of a BSS in which the AP or STA transmitting the PPDU is located.

An MPDU or PSDU includes two fields: MAC Header (MAC Header) and MSDU (chinese: MAC layer Service Data Unit; english: MAC Service Data Unit), and the MAC Header field includes BSSID (chinese: Basic Service Set identifier; english: Basic Service Set Identity) of BSS in which APs or STAs transmitting PPDUs other than uplink MU (chinese: Multi-User) PPDUs are located.

At present, the structures of HE-SIG-a fields in the uplink MU PPDU and the downlink MU PPDU are shown in fig. 6, and include: a Format indication (Format indication) field, a BSS Color (BSS Color) field, a TXOP duration (TXOPDuration) field, a Bandwidth (BW) field, a Number of HE-SIG-B symbols (Number of HE-SIG-B symbols) field, a modulation and coding scheme (MCS of HE-SIG-B) field of HE-SIG-B, a check code (CRC) field, and a Tail supplemental (Tail) field.

Considering that the parts related to the HE-SIG-B field (i.e., Number of HE-SIG-B symbols field and MCS of HE-SIG-B field) in the HE-SIG-a field in the uplink MU PPDU are reserved, i.e., not used, in the embodiment of the present invention, one or two of the Number of HE-SIG-B symbols fields MCS of HE-SIG-B field are used to carry a part of the BSSID of the BSS in which the STA transmitting the uplink MU PPDU is located, so as to distinguish whether the AP or STA in the present BSS and the STA in the OBSS are from the same BSS. Namely: an HE-SIG-a field of a PLCP header included in the uplink multi-user PPDU carries a part of a first BSSID, including:

and a reserved field in an HE-SIG-A field of a PLCP header contained in the uplink multi-user PPDU represents a part of the first BSSID.

Referring to fig. 7, fig. 7 is a diagram illustrating a structure of an HE-SIG-a field of a PLCP header included in an uplink multi-user PPDU according to an embodiment of the present invention. The method comprises the following steps: format indication field, BSS Color field, TXOP Duration field, BW field, partial BSSID field, CRC field and Tail field. Wherein, the partial BSSID domain carries a part of BSSID of BSS where STA sending uplink MU PPDU is located.

Next, how to determine that BSS Color collision occurs between the AP in the present BSS and the AP in the OBSS or the STA in the OBSS, and how to resolve the BSS Color collision between the AP in the present BSS and the AP in the OBSS or the STA in the OBSS will be described.

Referring to fig. 8, an embodiment of the present invention provides a method for processing information, including the following steps:

step 81: a first Access Point (AP) receives a physical layer convergence process PLCP Protocol Data Unit (PPDU), wherein the color of a BSS (base service set) where the first AP is located is the color of a first BSS, an identifier of the BSS where the first AP is located is a first BSSID, an HE-SIG-A field of a PLCP header contained in the PPDU contains a second BSS color, and a Media Access Control (MAC) header contained in the PPDU contains a second BSSID;

step 82: the first AP determining that the first BSS color is the same as the second BSS color and that the first BSSID is different from the second BSSID;

step 83: the first AP changes a channel currently used by the first AP to another available channel, or the first AP changes the first BSS color to another BSS color, where the another available channel is different from the channel currently used by the first AP, and the another BSS color is different from the first BSS color.

Wherein, steps 81-82 are used to determine that BSSColor collision occurs between the AP in the BSS and the AP in the OBSS or the STA in the OBSS, and step 83 is used to resolve BSSColor collision between the AP in the BSS and the AP in the OBSS or the STA in the OBSS.

Specifically, first, the first AP receives a PLCP protocol data unit PPDU of a physical layer convergence procedure transmitted by the STA or another AP, where an HE-SIG-a field of a PLCP header included in the PPDU includes a BSSColor of a BSS in which the STA or the AP transmitting the PPDU is located, and a MAC header included in the PPDU includes a BSSID of the BSS in which the STA or the AP transmitting the PPDU is located.

Then, the first AP compares the BSS Color of the BSS in which the first AP is located with the BSS Color of the STA or the BSS in which the AP transmits the PPDU, and the first AP compares the BSSID of the BSS in which the first AP is located with the BSSID of the STA or the BSS in which the AP transmits the PPDU.

If the BSSID of the BSS where the first AP is located is different from that of the STA or the AP which sends the PPDU, but the BSS Color is the same, it indicates that the first AP is not in the same BSS as the STA or the AP which sends the PPDU, but the first AP and the STA or the AP which sends the PPDU use the same BSS Color, and therefore, the first AP determines that the BSS Color collision occurs between the first AP and the STA or the AP which sends the PPDU.

If the BSS where the first AP is located is regarded as the BSS, and the STA which sends the PPDU or the BSS where the AP is located is regarded as the OBSS, it may be considered that a BSS Color collision occurs between the AP in the BSS and the AP in the OBSS or the STA in the OBSS.

Finally, the first AP processes BSS Color conflicts between the first AP and an AP in the OBSS or an STA in the OBSS, and there are two processing modes:

the first processing mode is as follows: the first AP changes the channel currently used by the first AP to another channel different from the channel currently used.

The second processing mode is as follows: the first AP selects another BSS Color different from the BSS Color of the STA that transmitted the PPDU or the BSS in which the AP is located, as the BSS Color of the BSS in which the first AP itself is located.

For the second processing manner, the replacing, by the first AP, the first BSS color with another BSS color includes:

and the first AP changes the color of the first BSS into the color of other BSSs, and informs the STA in the BSS where the first AP is located to change the color of the first BSS into the color of other BSSs. One possible way is: the first AP adds a BSS Color Switch Announce field in Beacon frames, Probe Response frames or other frames, and then broadcasts the BSS Color Switch Announce field to the STA in the BSS where the first AP is located, or broadcasts a BSS Color Switch Announce action frame to the STA in the BSS where the first AP is located. The BSS Color Switch notification field is defined as shown in table 1, and the BSS Color Switch notification action frame is defined as shown in table 2.

TABLE 1 BSS Color Switch acceptance field

Table 2 BSS Color Switch Announce action frame

In table 1, Element ID is an identifier unique to the BSS Color Switch acceptance field; length is the Length of BSS Color Switch acceptance field, and the value is 3; BSS Color Switch Mode is used for indicating the Mode of BSS Color Switch; new BSS Color is used for indicating New BSS Color; switch Count is used to indicate the time when the new BSS Color transition occurs.

The BSS Color Switch Announce action frame shown in table 2 is defined in the HT action frame. The basic architecture of HT action frames is adopted. Category is the identifier of BSS Color Switch Announce action frame, and for HT action frame, the value is 7; the HT Action is an identifier of a BSS Color Switch Announce Action frame Action, and an unused field in the HT Action can be adopted to indicate the BSS Color Switch Action; the BSS Color Switch acceptance field is shown in Table 1.

And after the STA in the BSS where the first AP is located receives the BSS Color Switch indication field or the BSS Color Switch indication action frame, updating the BSSColor according to the BSS Color Switch indication field.

For BSS Color conflict between the AP in the BSS and the AP in the OBSS, the solution method for the BSS Color conflict is as follows:

the first AP determines a Received Signal Strength Indication (RSSI) according to the received PPDUs sent by other APs;

if the RSSI is larger than a preset threshold value, the first AP changes the channel currently used by the first AP into other available channels;

Wherein the predetermined threshold may be a PD (chinese: Packet Detection; english: Packet Detection) value of the OBSS, that is: and if the signal intensity corresponding to the data packet in the OBSS is greater than the PD value, the data packet is considered to be detected.

Specifically, the AP and the OBSS AP in the BSS can hear each other, which indicates that the mutual interference between the two is serious. The probability that the AP and the OBSS AP in the BSS can perform parallel transmission depends on the relationship between the received power of the AP in the BSS and the PD value of the OBSS.

The method comprises the steps that a first AP receives PPDUs sent by other APs, the signal strength of the PPDUs sent by the other APs is determined, namely the receiving power of the first AP is determined, then the receiving power of the first AP is compared with the PD value of the BSS where the other APs are located, and if the receiving power of the first AP is larger than the PD value of the BSS where the other APs are located, the first AP changes a currently used channel into other available channels; and if the received power of the first AP is not greater than the PD value of the BSS where the other AP is located, the first AP changes the BSS color of the BSS where the first AP is located into the color of the other BSS.

For BSS Color conflict between the AP in the BSS and the STA in the OBSS, the solution to the BSS Color conflict is usually:

the first AP selects another BSSColor different from the BSS Color of the STA that sent the PPDU or the BSS in which the AP is located, as the BSS Color of the BSS in which the first AP itself is located.

For the BSS Color conflict between the STA in the BSS and the AP in the OBSS, or the BSS Color conflict between the STA in the BSS and the STA in the OBSS, after the STA in the BSS notifies the AP of the STA in the BSS that the BSS Color conflict occurs, a solution method for the AP of the STA in the BSS to the BSS Color conflict that has occurred is generally: and replacing the BSS Color.

Specifically, since the replacement of BSS Color can be quickly completed, the channel replacement requires a long switching time, the available channels at 5GHz have no BSS Color but a large number, and the selection space is not as large as the BSS Color, the replacement of BSS Color is a preferred solution for solving the BSS Color conflict.

First, how to determine that BSS Color collision occurs between an AP in the BSS and an AP in an OBSS will be described below.

One), if the AP in the OBSS sends a downlink single-user PPDU, determining that a BSS Color conflict occurs between the AP in the BSS and the AP in the OBSS, including:

and the first AP determines that the first BSS color is the same as the second BSS color, and determines that the first BSSID is different from a sending address TA in the received downlink single-user PPDU.

Specifically, on one hand, the first AP may parse the MAC header in the received single-user PPDU to obtain a transmission address, where the obtained transmission address is the BSSID of the BSS where the AP that transmits the single-user PPDU is located, and then compare the obtained transmission address with the BSSID of the BSS where the first AP itself is located, and on the other hand, the first AP may obtain the BSS color of the BSS where the AP that transmits the single-user PPDU is located from the HE-SIG-a field in the PLCP header in the received single-user PPDU, and then compare the BSS color of the BSS where the AP that transmits the single-user PPDU is located with the BSS color of the BSS where the first AP itself is located.

If the obtained sending address is different from the BSSID of the BSS where the first AP is located, the BSS where the AP sending the single-user PPDU is located is different from the BSS where the first AP is located, and under the condition that the obtained sending address is different from the BSSID of the BSS where the first AP is located, if the BSS Color of the BSS where the AP sending the single-user PPDU is located is the same as the BSS Color of the BSS where the first AP is located, it is determined that BSS Color conflict occurs between the first AP and the AP sending the single-user PPDU.

If the BSS where the first AP is located is regarded as the BSS, and the BSS where the AP sending the single-user PPDU is located is regarded as the OBSS, it may be considered that a BSS Color conflict occurs between the AP in the BSS and the AP in the OBSS.

Secondly), if the AP in the OBSS sends a downlink multi-user PPDU, it is determined that a BSS Color conflict occurs between the AP in the BSS and the AP in the OBSS, including:

and the first AP determines that the first BSS color is the same as the second BSS color, determines that the first AP does not send downlink multi-user PPDUs, and receives downlink multi-user PPDUs sent by other APs.

Specifically, if the first AP determines that the first BSS Color is the same as the second BSS Color, and the first AP determines that the first AP does not transmit the downlink multi-user PPDU, but receives downlink multi-user PPDUs transmitted by other APs, it is determined that the first AP and the AP transmitting the multi-user PPDU have a BSS Color collision.

Secondly, how to determine that BSS Color collision occurs between the AP in the BSS and the STA in the OBSS is described below.

One), if an uplink single-user PPDU is sent by an STA in an OBSS, determining that a BSS Color conflict occurs between an AP in the BSS and the STA in the OBSS, including:

and the first AP determines that the first BSS color is the same as the second BSS color, and determines that the first BSSID is different from a receiving address RA in the received uplink single-user PPDU.

Specifically, on one hand, the first AP may parse the MAC header in the received single-user PPDU to obtain a receiving address, where the obtained receiving address is the BSSID of the BSS where the STA that transmits the single-user PPDU is located, and then compare the obtained receiving address with the BSSID of the BSS where the first AP itself is located, and on the other hand, the first AP may obtain the BSS color of the BSS where the STA that transmits the single-user PPDU is located from the HE-SIG-a field in the PLCP header in the received single-user PPDU, and then compare the BSS color of the BSS where the STA that transmits the single-user PPDU is located with the BSS color of the BSS where the first AP itself is located.

If the obtained receiving address is different from the BSSID of the BSS where the first AP is located, the BSS where the STA sending the single-user PPDU is located is different from the BSS where the first AP is located, and under the condition that the obtained receiving address is different from the BSSID of the BSS where the first AP is located, if the BSS Color of the BSS where the STA sending the single-user PPDU is located is the same as the BSS Color of the BSS where the first AP is located, it is determined that BSS Color conflict occurs between the first AP and the STA sending the single-user PPDU.

If the BSS where the first AP is located is regarded as the BSS, and the BSS where the STA which sends the single-user PPDU is regarded as the OBSS, it may be considered that a BSS Color conflict occurs between the AP in the BSS and the STA in the OBSS.

Secondly), if the uplink multi-user PPDU sent by the STA in the OBSS, determining that the BSS Color conflict occurs between the AP in the BSS and the STA in the OBSS, including:

and the first AP determines that the first BSS color is the same as the second BSS color, determines that the first AP does not send a Trigger Frame (TF), and receives an uplink multi-user PPDU (direct protocol) sent by a Station (STA).

Specifically, if the first AP determines that the first BSS Color is the same as the second BSS Color, and the first AP determines that the first AP does not send a TF (chinese: Trigger Frame) but receives an uplink multi-user PPDU sent by the STA, it determines that a BSS Color collision occurs between the first AP and the STA sending the multi-user PPDU.

Or, for an uplink multi-user PPDU sent by an STA in an OBSS, determining that a BSS Color conflict occurs between an AP in the BSS and the STA in the OBSS, including:

a first Access Point (AP) receives an uplink multi-user Physical Layer Convergence Process (PLCP) protocol data unit (PPDU) sent by a Station (STA), wherein an HE-SIG-A field of a PLCP header contained in the uplink multi-user PPDU contains a first Basic Service Set (BSS) color, the HE-SIG-A field of the PLCP header contained in the uplink multi-user PPDU carries a part of a first Basic Service Set Identifier (BSSID), and the first BSSID is an identifier of a BSS where the STA sending the uplink multi-user PPDU is located;

the first AP determines that the first BSS color is the same as the second BSS color, and a part of the first BSSID carried by the HE-SIG-A field is not matched with a second BSSID, the second BSSID is the BSS color of the BSS where the first AP is located, and the second BSSID is an identifier of the BSS where the first AP is located.

As described above, in the embodiment of the present invention, the HE-SIG-a field of the PLCP header included in the uplink multi-user PPDU carries a part of the BSSID, and the BSSID is the BSSID of the BSS where the STA that transmits the multi-user PPDU is located, so on one hand, the first AP may obtain a part of the BSSID carried by the HE-SIG-a field of the PLCP header included in the received multi-user PPDU, and then match a part of the obtained BSSID with the BSSID of the BSS where the first AP itself is located, and on the other hand, the first AP may obtain the BSS color of the BSS where the STA that transmits the multi-user PPDU is located from the HE-SIG-a field in the PLCP header in the received multi-user PPDU, and then compare the BSS color of the BSS where the STA that transmits the multi-user PPDU with the BSS color of the BSS where the first AP itself is located.

If a part of the obtained BSSID is not matched with the BSSID of the BSS of the first AP, the BSS of the STA sending the multi-user PPDU is different from the BSS of the first AP, and on the premise that the part of the obtained BSSID is not matched with the BSSID of the BSS of the first AP, if the BSS Color of the BSS of the STA sending the multi-user PPDU is the same as the BSS Color of the BSS of the first AP, it is determined that the BSS Color collision occurs between the first AP and the STA sending the multi-user PPDU.

If the BSS where the first AP is located is taken as the BSS, and the BSS where the STA that sends the multi-user PPDU is taken as the OBSS, it can be considered that a BSS Color collision occurs between the AP in the BSS and the STA in the OBSS.

Next, how to determine that a BSS Color collision occurs between an STA in the own BSS and an AP in the OBSS or an STA in the OBSS, and how to resolve the BSS Color collision between the STA in the own BSS and the AP in the OBSS or the STA in the OBSS will be described.

Referring to fig. 9, an embodiment of the present invention provides a method for processing information, including the following steps:

step 91: a first station STA receives a physical layer convergence process PLCP protocol data unit PPDU, the BSS color of the first STA is a first basic service set BSS color, the identifier of the BSS of the first STA is a first basic service set identifier BSSID, an HE-SIG-A field of a PLCP header contained in the PPDU contains a second BSS color, and a media access control MAC header contained in the PPDU contains a second BSSID;

and step 92: the first STA determining that the first BSS color is the same as the second BSS color and that the first BSSID is different from the second BSSID;

step 93: and the first STA receives and transmits data according to a strategy that the data transmission and reception of the node which transmits the PPDU do not interfere with each other, or the first STA informs the AP associated with the first STA that BSS color conflict occurs.

Wherein, steps 91-92 are used to determine that BSS Color conflicts occur between STAs in the BSS and APs in the OBSS or STAs in the OBSS, and step 93 is used to resolve the BSS Color conflicts between STAs in the BSS and APs in the OBSS or STAs in the OBSS.

Specifically, first, the first STA receives a physical layer convergence procedure PLCP protocol data unit PPDU transmitted by an AP or another STA, where an HE-SIG-a field of a PLCP header included in the PPDU includes a BSS Color of a BSS in which the STA or the AP transmitting the PPDU is located, and a MAC header included in the PPDU includes a BSSID of the BSS in which the STA or the AP transmitting the PPDU is located.

Then, the first STA compares the BSS Color of the BSS in which the first STA is located with the BSS Color of the BSS in which the STA or the AP that transmitted the PPDU is located, and the first AP compares the BSSID of the BSS in which the first STA is located with the BSSID of the BSS in which the STA or the AP that transmitted the PPDU is located.

If the BSSID of the first STA is different from that of the STA or the AP which sends the PPDU, but the BSS Color is the same, the BSSID is different from that of the BSS which sends the PPDU, the fact that the first STA and the STA or the AP which sends the PPDU do not exist in the same BSS is indicated, but the first STA and the STA or the AP which sends the PPDU use the same BSS Color, and therefore the first STA determines that the BSS Color conflict occurs between the first STA and the STA or the AP which sends the PPDU.

If the BSS where the first STA is located is taken as the BSS, and the STA sending the PPDU or the BSS where the AP is located is taken as the OBSS, it may be considered that the STA in the BSS and the AP in the OBSS or the STA in the OBSS have a BSS Color collision.

Finally, the first STA processes the BSS Color conflict between the first STA and the AP in the OBSS or the STA in the OBSS, and there are two processing modes:

the first processing mode is as follows: and the first STA receives and transmits data according to a strategy that the data is not interfered with the data received and transmitted by the node which transmits the PPDU. Namely: the first STA informs the AP or other STAs which can hear each other to not receive data before transmitting data, and informs the AP or other STAs which can hear each other to not transmit data before receiving data. One possible way is: the first STA avoids interference with the node transmitting the PPDU by setting a NAV (chinese: Network allocation vector; english: Network allocation vector).

The second processing mode is as follows: the first STA informs the AP associated with the first STA that a BSS color collision has occurred, and the AP associated with the first STA decides how to resolve the occurring BSS color collision.

First, how to determine that the STA in the BSS collides with the AP in the OBSS by the BSS Color will be described below.

One), if the AP in the OBSS sends a downlink single-user PPDU, determining that a BSS Color conflict occurs between the STA in the BSS and the AP in the OBSS, including:

and the first STA determines that the first BSS color is the same as the second BSS color, and determines that the first BSSID is different from a sending address TA in the received downlink single-user PPDU.

Specifically, on one hand, the first STA may parse the MAC header in the received single-user PPDU to obtain a transmission address, where the obtained transmission address is the BSSID of the BSS where the AP that transmits the single-user PPDU is located, and then compare the obtained transmission address with the BSSID of the BSS where the first STA itself is located, and on the other hand, the first STA may obtain the BSS color of the BSS where the AP that transmits the single-user PPDU is located from the HE-SIG-a field in the PLCP header in the received single-user PPDU, and then compare the BSS color of the BSS where the AP that transmits the single-user PPDU is located with the BSS color of the BSS where the first STA itself is located.

If the obtained sending address is different from the BSSID of the BSS where the first STA is located, the BSS where the AP sending the single-user PPDU is located is different from the BSS where the first STA is located, and under the condition that the obtained sending address is different from the BSSID of the BSS where the first STA is located, if the BSS Color of the BSS where the AP sending the single-user PPDU is located is the same as the BSS Color of the BSS where the first STA is located, it is determined that BSS Color conflict occurs between the first STA and the AP sending the single-user PPDU.

If the BSS where the first STA is located is taken as the BSS, and the BSS where the AP sending the single-user PPDU is located is taken as the OBSS, it can be considered that a BSS Color conflict occurs between the STA in the BSS and the AP in the OBSS.

Second, how to determine that the BSS Color collision occurs between the STA in the BSS and the STA in the OBSS is described below.

One), if the STA in the OBSS sends an uplink single-user PPDU, determining that the STA in the BSS and the STA in the OBSS have a BSS Color conflict, includes:

and the first STA determines that the first BSS color is the same as the second BSS color, and determines that the first BSSID is different from a receiving address RA in the received uplink single-user PPDU.

Specifically, on one hand, the first STA may parse the MAC header in the received single-user PPDU to obtain a receiving address, where the obtained receiving address is the BSSID of the BSS where the STA that transmitted the single-user PPDU is located, and then compare the obtained receiving address with the BSSID of the BSS where the first STA itself is located, and on the other hand, the first STA may obtain the BSS color of the BSS where the STA that transmitted the single-user PPDU is located from the HE-SIG-a field in the PLCP header in the received single-user PPDU, and then compare the BSS color of the BSS where the STA that transmitted the single-user PPDU is located with the BSS color of the BSS where the first STA itself is located.

If the obtained receiving address is different from the BSSID of the BSS where the first STA is located, the BSS where the STA sending the single-user PPDU is located is different from the BSS where the first STA is located, and under the condition that the obtained receiving address is different from the BSSID of the BSS where the first STA is located, if the BSS Color of the BSS where the STA sending the single-user PPDU is located is the same as the BSS Color of the BSS where the first STA is located, it is determined that BSS Color conflict occurs between the first STA and the STA sending the single-user PPDU.

If the BSS where the first STA is located is taken as the BSS, and the BSS where the STA sending the single-user PPDU is located is taken as the OBSS, it can be considered that the STA in the BSS and the STA in the OBSS have a BSS Color conflict.

Secondly), if the uplink multi-user PPDU sent by the STA in the OBSS, determining that the BSS Color conflict occurs between the STA in the BSS and the STA in the OBSS, and including:

a first station STA receives an uplink multi-user physical layer convergence process PLCP Protocol Data Unit (PPDU), wherein the color of a BSS (base service set) where the first STA is located is a first BSS color, an identifier of the BSS where the first STA is located is a first BSSID, an HE-SIG-A field of a PLCP head contained in the uplink multi-user PPDU contains a second BSS color, and an HE-SIG-A field of the PLCP head contained in the uplink multi-user PPDU carries a part of a second BSSID;

the first STA determines that the first BSS color is the same as the second BSS color and that a portion of the second BSSID carried by the HE-SIG-a field does not match the first BSSID.

As described above, in the embodiment of the present invention, the HE-SIG-a field of the PLCP header included in the uplink multi-user PPDU carries a part of the BSSID, and the BSSID is the BSSID of the BSS where the STA that transmits the multi-user PPDU is located, so on one hand, the first STA may obtain a part of the BSSID carried by the HE-SIG-a field of the PLCP header included in the received multi-user PPDU, and then match a part of the obtained BSSID with the BSSID of the BSS where the first STA itself is located, and on the other hand, the first STA may obtain the BSS color of the BSS where the STA that transmits the multi-user PPDU is located from the HE-SIG-a field in the PLCP header in the received multi-user PPDU, and then compare the BSS color of the BSS where the STA that transmits the multi-user PPDU with the BSS color of the STA that the first itself is located.

If a part of the obtained BSSID is not matched with the BSSID of the BSS where the first STA is located, the BSS where the STA sending the multi-user PPDU is located is different from the BSS where the first STA is located, and on the premise that the part of the obtained BSSID is not matched with the BSSID of the BSS where the first STA is located, if the BSS Color of the BSS where the STA sending the multi-user PPDU is located is the same as the BSS Color of the BSS where the first STA is located, it is determined that the BSS Color collision occurs between the first STA and the STA sending the multi-user PPDU.

If the BSS where the first STA is located is taken as the BSS, and the BSS where the STA sending the multi-user PPDU is located is taken as the OBSS, it can be considered that a BSS Color conflict occurs between the STA in the BSS and the STA in the OBSS.

Optionally, the method further includes:

and the node sending the uplink multi-user PPDU carries a part of the second BSSID in a reserved field in an HE-SIG-A field of a PLCP header contained in the uplink multi-user PPDU.

Specifically, in the embodiment of the present invention, a STA transmitting an uplink multi-user PPDU may carry a part of a BSSID of a BSS where the STA is located in a reserved field in an HE-SIG-a field of a PLCP header included in the uplink multi-user PPDU, where the reserved field may be a field (e.g., a Number of HE-SIG-Bsymbols field shown in fig. 6) used to characterize a length of the HE-SIG-B field, and/or a field (e.g., an MCS of HE-SIG-B field shown in fig. 6) used to characterize a modulation and coding strategy MCS of the HE-SIG-B field in the HE-SIG-a field.

Based on the same inventive concept, an embodiment of the present invention provides a first AP, please refer to fig. 10, where fig. 10 is a schematic block diagram of the first AP according to the embodiment of the present invention. The meaning and specific implementation of the terms referred to by the first AP shown in fig. 10 may refer to the foregoing fig. 1 to 9 and the related description of the embodiments.

As shown in fig. 10, the first AP includes:

a receiving unit 101, configured to receive a PLCP protocol data unit PPDU in a physical layer convergence process, where a BSS color of a first AP is a first basic service set BSS color, an identifier of the BSS of the first AP is a first basic service set identifier BSSID, an HE-SIG-a field of a PLCP header included in the PPDU includes a second BSS color, and a media access control MAC header included in the PPDU includes a second BSSID;

a determining unit 102, configured to determine that the first BSS color is the same as the second BSS color, and the first BSSID is different from the second BSSID;

a processing unit 103, configured to replace a channel currently used by the first AP with another available channel, or replace the first BSS color with another BSS color, where the another available channel is different from the channel currently used by the first AP, and the another BSS color is different from the first BSS color.

Optionally, the determining unit 102 includes:

a first determining subunit, configured to determine that the first BSSID is different from a transmission address TA in the received downlink single-user PPDU; or

And the second determining subunit is used for determining that the first BSSID is different from a receiving address RA in the received uplink single-user PPDU.

Optionally, the determining unit 102 includes:

a third determining subunit, configured to determine that the first AP does not send a downlink multi-user PPDU, and receive downlink multi-user PPDUs sent by other APs, where the other APs are different from the first AP.

Optionally, the determining unit 102 includes:

and a fourth determining subunit, configured to determine that the first AP does not send the trigger frame TF and receives an uplink multi-user PPDU sent by the station STA.

Optionally, the processing unit 103 includes:

a determining subunit, configured to determine, according to a received PPDU sent by another AP, a received signal strength indication RSSI, where the another AP is different from the first AP;

a channel changing subunit, configured to, if the RSSI is greater than a predetermined threshold, change the channel currently used by the first AP to another available channel.

Optionally, the processing unit 103 includes:

a BSS color changing subunit, configured to change the first BSS color to another BSS color if the RSSI is not greater than the predetermined threshold.

Optionally, the receiving unit 101 is configured to:

receiving a PLCP protocol data unit PPDU (physical layer convergence protocol) of an uplink multi-user, wherein the color of a BSS (base service set) where a first AP (access point) is located is the color of a BSS (first basic service set), an identifier of the BSS where the first AP is located is a BSSID (first basic service set identifier), an HE-SIG-A field of a PLCP head contained in the uplink multi-user PPDU contains a second BSS color, and the HE-SIG-A field of the PLCP head contained in the uplink multi-user PPDU carries a part of the second BSSID;

the determining unit 102 is configured to: means for determining that the first BSS color is the same as the second BSS color and that a portion of the second BSSID carried by the HE-SIG-A field does not match the first BSSID;

the processing unit 103 is configured to: for replacing the first BSS color with an other BSS color, the other BSS color being different from the first BSS color.

Optionally, an HE-SIG-a field of a PLCP header included in the uplink multi-user PPDU carries a part of the second BSSID, including:

Various changes and specific examples in the method for processing information in the foregoing embodiment of fig. 8 are also applicable to the first AP in this embodiment, and a person skilled in the art can clearly know the implementation method of the first AP in this embodiment through the foregoing detailed description of the method for processing information, so that details are not described here for brevity of description.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a first AP according to an embodiment of the present invention. The meaning and specific implementation of the terms referred to by the first AP shown in fig. 11 may refer to the foregoing fig. 1 to 9 and the related description of the embodiments.

As shown in fig. 11, the first AP includes:

a receiver 111, a memory 112, a processor 113, wherein the processor 113 is connected with the memory 112 and the receiver 111 through a bus 110;

the receiver 111 is configured to receive a PLCP protocol data unit PPDU in a multi-user physical layer convergence procedure;

the memory 112 is used for storing instructions executed by the processor;

the processor 113 is configured to execute the instructions, and when the instructions are executed by the processor 113, the processor 113 executes the method for processing information in the foregoing embodiments.

Where in fig. 11 a bus architecture (represented by bus 110) is shown, bus 110 may include any number of interconnected buses and bridges, with bus 110 connecting together various circuits including one or more processors, represented by processor 113, and memory, represented by memory 112. The bus 110 may also connect various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are well known in the art, and therefore, will not be described any further herein. A bus interface 114 provides an interface between the bus 110 and the receiver 111. The receiver 111 may be a transceiver providing a means for communicating with various other apparatus over a transmission medium.

The processor 113 is responsible for managing the bus 110 and general processing, and the memory 112 may be used for storing data used by the processor 113 in performing operations.

The first AP may specifically be a wireless router, a hotspot, or an electronic device with a hotspot function, such as a mobile phone and a tablet computer.

Various changes and specific examples of the first AP execution process described in the foregoing embodiments are also applicable to the first AP of this embodiment, and a person skilled in the art can clearly know the implementation method of the first AP in this embodiment through the foregoing detailed description of the first AP execution process, so that details are not described here for brevity of the description.

Based on the same inventive concept, an embodiment of the present invention provides a first STA, please refer to fig. 12, where fig. 12 is a block diagram of the first STA according to the embodiment of the present invention. The meaning and specific implementation of the terms referred to by the first STA shown in fig. 12 may refer to the foregoing fig. 1 to 9 and the related description of the embodiments.

As shown in fig. 12, the first STA includes:

a receiving unit 121, configured to receive a PLCP protocol data unit PPDU in a physical layer convergence process, where a BSS color of a first STA is a first basic service set BSS color, an identifier of the BSS of the first STA is a first basic service set identifier BSSID, an HE-SIG-a field of a PLCP header included in the PPDU includes a second BSS color, and a media access control MAC header included in the PPDU includes a second BSSID;

a determining unit 122, configured to determine that the first BSS color is the same as the second BSS color, and the first BSSID is different from the second BSSID;

a processing unit 123, configured to receive and transmit data according to a policy that does not interfere with data reception and transmission of a node that transmits the PPDU, or notify an AP associated with the first STA that a BSS color collision has occurred.

Optionally, the determining unit 122 includes:

Optionally, the receiving unit 121 is configured to:

receiving a PLCP protocol data unit PPDU (physical layer convergence protocol) in an uplink multi-user PPDU (physical layer convergence process), wherein the color of a BSS (base service set) where a first STA is located is a first BSS color, an identifier of the BSS where the first STA is located is a first BSSID, an HE-SIG-A field of a PLCP head contained in the uplink multi-user PPDU contains a second BSS color, and the HE-SIG-A field of the PLCP head contained in the uplink multi-user PPDU carries a part of the second BSSID;

the determining unit 122 is configured to: determining that the first BSS color is the same as the second BSS color and that a portion of the second BSSID carried by the HE-SIG-A field does not match the first BSSID;

the processing unit 123 is configured to: and transmitting and receiving data according to a strategy that data transmission and reception are not interfered with each other with a node transmitting the PPDU, or informing an AP associated with the first STA that BSS color conflict occurs.

Various changes and specific examples in the method for processing information in the foregoing embodiment of fig. 9 are also applicable to the first STA in this embodiment, and a person skilled in the art can clearly know an implementation method of the first STA in this embodiment through the foregoing detailed description of the method for processing information, so that details are not described here for brevity of the description.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a first STA according to an embodiment of the present invention. The meaning and specific implementation of the terms referred to by the first STA shown in fig. 13 may refer to the foregoing fig. 1 to 9 and the related description of the embodiments.

As shown in fig. 13, the first STA includes:

a receiver 131, a memory 132, a processor 133, wherein the processor 133 is connected with the memory 132 and the receiver 131 through a bus 130;

the receiver 131 is configured to receive a multi-user physical layer convergence procedure PLCP protocol data unit PPDU;

the memory 132 is used for storing instructions executed by the processor;

the processor 133 is configured to execute the instructions, and when the instructions are executed by the processor 133, the processor 133 executes the method for processing information in the foregoing embodiments.

Where in fig. 13 a bus architecture (represented by bus 130), bus 130 may include any number of interconnected buses and bridges, bus 130 connecting together various circuits including one or more processors, represented by processor 133, and memory, represented by memory 132. The bus 130 may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 134 provides an interface between the bus 130 and the receiver 131. The receiver 131 may be a transceiver providing a means for communicating with various other apparatus over a transmission medium.

The processor 133 is responsible for managing the bus 130 and general processing, and the memory 132 may be used for storing data used by the processor 133 in performing operations.

The first STA may specifically be a mobile phone, a tablet computer, and other user-side devices.

Various modifications and specific examples of the first STA performing procedure described in the foregoing embodiments are also applicable to the first STA of this embodiment, and a person skilled in the art can clearly know the implementation method of the first STA in this embodiment through the foregoing detailed description of the first STA performing procedure, so that details are not described herein again for the sake of brevity of the description.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of processing information, the method comprising:

2. The method of claim 1, wherein the first AP determining that the first BSSID is different from the second BSSID comprises:

3. The method of claim 1, wherein the first AP determining that the first BSSID is different from the second BSSID comprises:

4. The method of claim 1, wherein the first AP determining that the first BSSID is different from the second BSSID comprises:

5. The method of claim 1, wherein the first AP replacing a channel currently used by the first AP with another available channel, comprising:

6. The method of claim 1, wherein the first AP changing the first BSS color to the other BSS color comprises:

if the RSSI is not greater than a preset threshold value, the first AP changes the first BSS color into other BSS colors.

7. An information processing method, characterized in that the method comprises:

a first Access Point (AP) receives a notification from a first STA, wherein the first AP is an AP associated with the first STA, the color of a BSS in which the first AP is located is a first Basic Service Set (BSS) color, an identifier of the BSS in which the first AP is located is a first BSSID, a first field contained in the notification contains a second BSS color, the notification contains a first field carrying a part of a second BSSID, the first AP determines that the first BSS color is the same as the second BSS color, and the part of the second BSSID carried by the first field is not matched with the first BSSID, and the notification is used for indicating that BSS color collision occurs;

and the first AP changes the color of the BSS where the first AP is located into the color of other BSSs, and the colors of the other BSSs are different from the color of the BSS where the first AP is located.

8. The method of claim 7, wherein the method further comprises:

and the first AP sends indication information to the first STA, wherein the indication information indicates that the BSS color of the first STA is the color of the other BSSs.

9. An information processing method, characterized in that the method comprises:

the first STA notifying an AP associated with the first STA that a BSS color collision has occurred.

10. The method of claim 9, wherein the first STA determining that the first BSSID is different from the second BSSID comprises:

11. A first Access Point (AP), comprising:

a receiving unit, configured to receive a PLCP protocol data unit PPDU in a physical layer convergence process, where a BSS color of a first AP is a first basic service set BSS color, an identifier of the BSS of the first AP is a first basic service set identifier BSSID, an HE-SIG-a field of a PLCP header included in the PPDU includes a second BSS color, and a media access control MAC header included in the PPDU includes a second BSSID;

a determining unit, configured to determine that the first BSS color is the same as the second BSS color and the first BSSID is different from the second BSSID;

a processing unit, configured to replace a channel currently used by the first AP with another available channel, or replace the first BSS color with another BSS color, where the another available channel is different from the channel currently used by the first AP, and the another BSS color is different from the first BSS color.

12. The first AP of claim 11, wherein the determining unit includes:

13. The first AP of claim 11, wherein the determining unit includes:

14. The first AP of claim 11, wherein the determining unit includes:

15. The first AP of claim 11, wherein the processing unit comprises:

16. The first AP of claim 11, wherein the processing unit comprises:

a BSS color changing subunit, configured to change the first BSS color to another BSS color if the RSSI is not greater than a predetermined threshold.

17. A first Access Point (AP), comprising:

a receiving unit, configured to receive a notification from a first STA, where the first AP is an AP associated with the first STA, a color of a BSS where the first AP is located is a first basic service set BSS color, an identifier of the BSS where the first AP is located is a first basic service set identifier BSSID, a first field included in the notification includes a second BSS color, the notification includes a first field that carries a part of a second BSSID, the first AP determines that the first BSS color is the same as the second BSS color, and the part of the second BSSID carried by the first field does not match the first BSSID, and the notification is used to indicate that a BSS color collision occurs; and the processing unit is used for replacing the color of the BSS where the first AP is located with the color of other BSSs, and the colors of the other BSSs are different from the color of the BSS where the first AP is located.

18. The first AP of claim 17, wherein the first AP includes a transmitting unit configured to transmit indication information to the first STA, where the indication information indicates that the BSS color in which the first STA is located is the other BSS color.

19. A first Station (STA), comprising:

a receiving unit, configured to receive a physical layer convergence procedure PLCP protocol data unit PPDU, where a BSS color of a first STA is a first basic service set BSS color, an identifier of the BSS of the first STA is a first basic service set identifier BSSID, an HE-SIG-a field of a PLCP header included in the PPDU includes a second BSS color, and a media access control MAC header included in the PPDU includes a second BSSID;

a processing unit for notifying an AP associated with the first STA that a BSS color collision has occurred.

20. The first STA of claim 19, wherein the determining unit comprises: