WO2016149890A1

WO2016149890A1 - Method of measuring distance between nan device, and nan device

Info

Publication number: WO2016149890A1
Application number: PCT/CN2015/074802
Authority: WO
Inventors: 李小仙; 方平
Original assignee: 华为技术有限公司
Priority date: 2015-03-20
Filing date: 2015-03-20
Publication date: 2016-09-29
Also published as: CN106717068A; CN106717068B

Abstract

The present invention relates to the technical field of communications, and particularly relates to a method of measuring a distance between neighbor awareness network (NAN) devices and a NAN device, so as to address the low efficiency problem of measuring a distance between NAN devices. In embodiments of the present invention, a first NAN device can carry distance measurement triggering information in a first message, thus allowing the first message to be discovered in a discovery window (DW); namely, in the embodiments of the present invention, a distance measurement can be triggered in the DW, and does not have to be separately triggered after the completion of the DW, thereby saving the time required for distance measuring and improving the efficiency of distance measuring.

Description

Method for measuring distance between NAN devices and NAN device

Technical field

The present invention relates to the field of communications technologies, and in particular, to a distance measurement method between NAN devices and a NAN device.

Background technique

Currently, Wi-Fi (Wireless-Fidelity) technology continues to improve. For example, Wi-Fi-based NAN (Neighbor Awareness Network) technology is also proposed, also known as Wi-Fi Aware (Wi). -Fi proximity technology, in the absence of a central node, the technology can synchronize all NAN-involved devices (which can be called NAN devices), and perform NAN maintenance work and service discovery in the NAN-consured discovery window. In this way, the NAN device can continuously discover other NAN devices, thereby establishing a connection between the NAN devices to implement data transmission.

In the NAN mechanism, a DW (discovery window) is set, and the NAN device performs service discovery in the DW.

At present, wireless terminals have various service forms, and there is an increasing demand for ranging between wireless terminals when performing service discovery, such as friends approaching detection, advertising within a limited distance range, and the like. However, between the NAN devices, if the ranging is to be completed, it generally needs to be performed after the DW ends. That is, after the DW ends, one NAN device can send a trigger message for ranging to another NAN device. Another NAN device supports ranging, and the two NAN devices can complete the ranging. It can be seen that in the prior art, if the ranging between the NAN devices is to be completed, it takes a lot of time and the ranging efficiency is low.

Summary of the invention

The embodiments of the present invention provide a distance measurement method between NAN devices and a NAN device, which are used to solve the technical problem of low efficiency when ranging between NAN devices.

In a first aspect, an embodiment of the present invention provides a method for measuring a distance between NAN devices, and a packet include:

The first NAN device sends a first message in the DW, where the first message carries ranging trigger information for triggering the second NAN device to perform ranging, and information of the first time window; the discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging;

Receiving, by the first NAN device, the second message sent by the second NAN device, obtaining a first time to receive the second message, and determining a ranging capability of the second NAN device according to the second message, The second message is a response message for the first message;

The first NAN device sends a third message to the second NAN device, obtains a second time to send the third message, and obtains first parameter group information according to the first time and the second time; The first parameter group information is used to obtain a distance between the first NAN device and the second NAN device, where the third message is an acknowledgement message for the second message;

Receiving, by the first NAN device, the second parameter group information sent by the second NAN device in the first time window, where the first NAN device is configured according to the first parameter group information and the second parameter Group information, obtaining a distance between the first NAN device and the second NAN device; and/or, the first NAN device transmitting the first to the second NAN device in a first time window a parameter group information, so that the second NAN device obtains a distance between the first NAN device and the second NAN device according to the first parameter group information and the second parameter group information;

The second parameter group information is: the second time when the second NAN device obtains the second message, and obtains a fourth time to receive the third message, according to the third moment and the The parameter group information obtained at the fourth time, the second parameter group information is used to obtain a distance between the first NAN device and the second NAN device.

With reference to the first aspect, in a first possible implementation, the first message is an SDF message in the NAN, and the first message carries the service information subscribed or issued by the first NAN device.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation, the first NAN device receives the second message sent by the second NAN device, including:

The first NAN device receives the second message in the discovery window or the first time window.

In a second aspect, the embodiment of the present invention provides one or any of the following;

The ranging principle indication information is used to indicate a measurement principle on which the distance measurement is performed;

The ranging protocol indication information is used to indicate a measurement protocol on which the distance measurement is performed;

The ranging requirement indication information is used to indicate a requirement for a parameter that needs to be met for the measured distance;

The ranging requirement indication information is used to indicate a requirement for a distance of a NAN device that satisfies the service information;

The ranging open indication information is used to instruct the second NAN device to enable the ranging function.

In a third aspect, an embodiment of the present invention provides a method for measuring a distance between NAN devices, including:

The second NAN device receives the first message sent by the first NAN device in the DW, where the first message carries the ranging trigger information for triggering the second NAN device to perform ranging, and the information of the first time window. The discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging;

The second NAN device sends a second message to the first NAN device to obtain a third time to send the second message, where the second message is used to indicate the ranging capability of the second NAN device. The second message is a response message for the first message;

The second NAN device receives the third message sent by the first NAN device, obtains a fourth time to receive the third message, and obtains second parameter group information according to the third time and the fourth time; The second parameter group information is used to obtain a distance between the first NAN device and the second NAN device, where the third message is an acknowledgement message for the second message;

Receiving, by the second NAN device, the first parameter group information sent by the first NAN device in the first time window, where the second NAN device is configured according to the first parameter group information and the second parameter group information Obtaining a distance between the first NAN device and the second NAN device; and / Or the second NAN device sends the second parameter group information to the first NAN device in a first time window, so that the first NAN device is configured according to the second parameter group information and the first Obtaining a distance between the first NAN device and the second NAN device by a parameter group information;

The first parameter group information is: the first time that the first NAN device obtains the second message, and the second time that the third message is sent, according to the first time and the The parameter group information obtained at the second moment is used to obtain a distance between the first NAN device and the second NAN device.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the first message is an SDF message in the NAN, where the first message carries a service subscribed or published by the first NAN device. information.

With the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner, the second NAN device sends the second message to the first NAN device, including:

The second NAN device sends the second message to the first NAN device in the discovery window or the first time window.

In a fourth aspect, the embodiment of the present invention provides one or any of the following;

In a fifth aspect, an embodiment of the present invention provides a NAN device, including:

a sending module, configured to send a first message in the DW, where the first message carries ranging trigger information for triggering the second NAN device to perform ranging, and information of a first time window; the discovery window The time window for performing service discovery in the NAN, the first message is for Performing a service discovery message, where the first time window is a time window for performing ranging;

a determining module, configured to receive a second message sent by the second NAN device, obtain a first time to receive the second message, and determine a ranging capability of the second NAN device according to the second message, where The second message is a response message for the first message;

The sending module is further configured to send a third message to the second NAN device, obtain a second time to send the third message, and obtain first parameter group information according to the first time and the second time The first parameter group information is used to obtain a distance between the NAN device and the second NAN device, and the third message is an acknowledgement message for the second message;

The determining module is further configured to receive the second parameter group information sent by the second NAN device in the first time window, and obtain the second parameter group information according to the first parameter group information and the second parameter group information. a distance between the NAN device and the second NAN device; and/or the sending module is further configured to send the first parameter group information to the second NAN device in a first time window The second NAN device obtains a distance between the NAN device and the second NAN device according to the first parameter group information and the second parameter group information;

The second parameter group information is: the second time when the second NAN device obtains the second message, and obtains a fourth time to receive the third message, according to the third moment and the The parameter group information obtained at the fourth time is used, and the second parameter group information is used to obtain a distance between the NAN device and the second NAN device.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the first message is an SDF message in the NAN, where the first message carries a service subscribed or published by the first NAN device. information.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in the second possible implementation, the determining module is configured to receive the second message sent by the second NAN device, specifically:

Receiving the second message in the discovery window or the first time window.

In a sixth aspect, the embodiment of the present invention provides one or any of the following;

In a seventh aspect, an embodiment of the present invention provides a NAN device, including:

a receiving module, configured to receive, in the DW, a first message sent by the first NAN device, where the first message carries ranging trigger information for triggering the NAN device to perform ranging, and information of the first time window; The discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging;

An acquiring module, configured to send a second message to the first NAN device, to obtain a third moment to send the second message, where the second message is used to indicate a ranging capability of the NAN device, and the second The message is a response message for the first message;

The receiving module is further configured to receive a third message sent by the first NAN device, obtain a fourth time to receive the third message, and obtain a second parameter group according to the third time and the fourth time The second parameter group information is used to obtain a distance between the first NAN device and the NAN device, where the third message is an acknowledgement message for the second message;

The receiving module is further configured to receive the first parameter group information sent by the first NAN device in a first time window, and obtain the foregoing according to the first parameter group information and the second parameter group information. a distance between the first NAN device and the NAN device; and/or the acquiring module is further configured to send the second parameter group information to the first NAN device in a first time window, so that Obtaining, by the first NAN device, a distance between the first NAN device and the NAN device according to the second parameter group information and the first parameter group information;

The first parameter group information is: the first time when the first NAN device obtains the second message, and the second time when the third message is sent, according to the first time And the parameter group information obtained at the second moment, the first parameter group information is used to obtain a distance between the first NAN device and the NAN device.

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the first message is an SDF message in the NAN, where the first message carries a service subscribed or published by the first NAN device. information.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a second possible implementation, the acquiring module is configured to send a second message to the first NAN device, specifically: Transmitting the second message to the first NAN device in the discovery window or the first time window.

In an eighth aspect, the embodiment of the present invention provides one or any of the following;

In a ninth aspect, an embodiment of the present invention provides a NAN device, including a memory, a processor, and a transceiver connected to the same bus;

The memory is configured to store an instruction;

The transceiver is configured to send a first message in the DW, where the first message carries ranging trigger information for triggering the second NAN device to perform ranging, and information of a first time window; The discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, the first time window is a time window for performing ranging, and the second is received a second message sent by the NAN device;

The processor is configured to execute the instruction, obtain a first time to receive the second message, and determine a ranging capability of the second NAN device according to the second message, where the second message is a pin a response message to the first message;

The transceiver is further configured to send a third message to the second NAN device;

The processor is further configured to obtain a second time when the third message is sent, and obtain first parameter group information according to the first time and the second time; the first parameter group information is used to obtain a Defining a distance between the NAN device and the second NAN device, where the third message is an acknowledgement message for the second message;

The transceiver is further configured to receive the second parameter group information that is sent by the second NAN device in the first time window, where the processor is further configured to use the first parameter group information and the The second parameter group information is obtained, obtaining a distance between the NAN device and the second NAN device; and/or the transceiver is further configured to, in the first time window, to the second NAN device Transmitting the first parameter group information, so that the second NAN device obtains a distance between the NAN device and the second NAN device according to the first parameter group information and the second parameter group information;

With reference to the ninth aspect, in a first possible implementation manner of the ninth aspect, the first message is an SDF message in the NAN, where the first message carries a service subscribed or published by the first NAN device. information.

With reference to the ninth aspect, or the first possible implementation manner of the ninth aspect, in a second possible implementation, the transceiver is configured to receive the second message sent by the second NAN device, specifically:

Receiving the second message in the discovery window or the first time window.

A tenth aspect, the embodiment of the present invention provides one or any of the following;

The ranging requirement indication information is used to indicate a requirement of a parameter that needs to be satisfied for the measured distance begging;

In an eleventh aspect, an embodiment of the present invention provides a proximity aware network NAN device, including a memory, a processor, and a transceiver connected to the same bus;

The memory is configured to store an instruction;

The transceiver is configured to receive, in a discovery window DW, a first message sent by a first NAN device, where the first message carries a ranging trigger information for triggering the NAN device to perform ranging, and a first time Information of the window; the discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging; And sending a second message to the first NAN device;

The processor is configured to execute the instruction, obtain a third moment to send the second message, where the second message is used to indicate ranging capability of the NAN device, and the second message is for the a response message of the first message;

The transceiver is further configured to receive a third message sent by the first NAN device;

The processor is further configured to obtain a fourth time to receive the third message, obtain second parameter group information according to the third time and the fourth time; the second parameter group information is used to obtain the Defining a distance between the first NAN device and the NAN device, where the third message is an acknowledgement message for the second message;

The transceiver is further configured to receive the first parameter group information sent by the first NAN device in a first time window, where the processor is further configured to use, according to the first parameter group information, the The second parameter group information is obtained, and the distance between the first NAN device and the NAN device is obtained; and/or the transceiver is further configured to send the first NAN device to the first NAN device in a first time window. The second parameter group information is obtained, so that the first NAN device obtains a distance between the first NAN device and the NAN device according to the second parameter group information and the first parameter group information;

The first parameter group information is: the first NAN device obtains the second cancellation The first time of the information, and the second time when the third message is sent, the first parameter group information is used to obtain the first parameter according to the parameter group information obtained by the first time and the second time The distance between a NAN device and the NAN device.

With reference to the eleventh aspect, in a first possible implementation manner of the eleventh aspect, the first message is an SDF message in the NAN, where the first message carries the first NAN device subscription or release Service information.

With reference to the eleventh aspect, or the first possible implementation manner of the eleventh aspect, in a second possible implementation, the transceiver is configured to send a second message to the first NAN device, specifically:

Transmitting the second message to the first NAN device in the discovery window or the first time window.

In a twelfth aspect, the embodiment of the present invention provides one or any of the following;

In the embodiment of the present invention, if the first NAN device wants to measure the distance between the second NAN device and the second NAN device, the first NAN device may carry the ranging trigger information in the first message, so that the first message may be in the DW. Transmitting, and if the second NAN device supports ranging, the second NAN device sends the second parameter group information to the first NAN device in the first time window, so that the first NAN device can obtain the first NAN. The distance between the device and the second NAN device, or the first NAN device may also send the obtained first parameter group information to the second NAN device, so that the second NAN device obtains the first NAN device and the second NAN device. The distance between them. For example, the first time window is a service window, that is, in the embodiment of the present invention, the ranging trigger can be performed in the DW without After the completion of the DW, a special message is used to perform the ranging trigger, which saves the time required for ranging and improves the ranging efficiency.

In addition, in the embodiment of the present invention, the ranging trigger information can be carried in the first message, and the measurement trigger information is not required to be sent by using a message as in the prior art, thereby reducing the amount of information interaction and saving network resources. .

DRAWINGS

1 is a main flowchart of a method for measuring a distance between a first type of NAN device according to an embodiment of the present invention;

2 is a main flowchart of a distance measurement method between second NAN devices according to an embodiment of the present invention;

3 is a flowchart of a specific example of a method for measuring a distance between NAN devices according to an embodiment of the present invention;

4 is a flowchart of another specific example of a distance measurement method between NAN devices according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of a first NAN device according to an embodiment of the present invention;

6 is a structural block diagram of a second NAN device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a first NAN device according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a second NAN device according to an embodiment of the present invention.

detailed description

First introduce the relevant content of the NAN mechanism.

The NAN mechanism generally has one DW set in every 512 TU (time unit), wherein the duration of one TU is about 1024 μs, and the duration of DW is generally 16 TU, that is, in the NAN mechanism, generally every 496 TUs. Set a DW. In the NAN mechanism, one or more NAN devices form a cluster. When a cluster enters the DW, the cluster is in the master (master node), anchor master (AM, anchor master node), and non-master. NAN device sending status such as sync (non-master synchronization, master node responsible for synchronization) A sync beacon message, the message carrying the information of the AM in the cluster, and the NAN device receiving the message is synchronized with the AM in the cluster.

The process for NAN equipment to complete service discovery is as follows:

1. After a device activates the NAN function (that is, after becoming a NAN device), it can set itself to AM, create a cluster, and set the cluster's Cluster ID based on its MAC (Media Access Control) address. Identity, identity value, set the TSF to an integer multiple of 512TU.

2. Once the NAN device receives a Beacon frame (that is, a sync beacon, which is collectively referred to as a Beacon frame) sent from a NAN device of one or more other clusters, it can determine whether it wants to join the other party's Cluster.

In the Beacon frame, the information about the corresponding cluster is generally carried, which may be the information of the AM in the corresponding cluster. For example, the AMR (anchor master rank) and the MR (master rank) may be included. , MP (Master Preference), AMP (anchor Master Preference), RF (random factor, random factor), AMBTT (Anchor Master Beacon Transmission Time), One or more of TSF (time synchronization function), Cluster ID, and CG (Cluster grade).

A NAN device can send the information of the AM of the cluster to which it belongs to other NAN devices by sending a Beacon frame. Similarly, a NAN device can also receive the Beacon frame sent by the NAN device in the cluster or other clusters.

After receiving a Beacon frame, the NAN device can determine whether the Beacon frame is from a NAN device in the cluster to which it belongs or from a NAN device in another cluster. If the NAN device is from another Cluster, the NAN device can determine to receive the packet. If the value of the CG in the Beacon frame is greater than the value of the CG, if the value is greater than, the NAN device joins the cluster corresponding to the received Beacon frame. Otherwise, the NAN device does not process. This completes the aggregation of the NAN device, that is, the NAN device will join the Cluster with a higher CG value.

3. If it is determined that you want to join the other party's Cluster, then after joining the other party's Cluster, The AM in the added cluster is synchronized, and the parameter information in the AM is synchronized with the AM in the added cluster, for example, the original TSF is updated to the TSF of the AM in the added cluster.

After the synchronization, when the DW of the added Cluster arrives, the NAN device sends an SDF (Service Discovery Frames) message in the DW to perform service discovery. The SDF message may be carried, for example, for query. Service Query information of the service, or for example, may carry Service Publish information for publishing the service that the NAN device can provide. After receiving the SDF message sent by the NAN device, the other NAN device receives the SDF message. If it is determined that the SDF message is satisfied, that is, the service matching can be performed, the SDF message can be replied to the NAN device in the DW.

Similarly, in the DW, the NAN device may also receive an SDF message sent by another NAN device for service discovery. If the NAN device determines that the received SDF message is satisfied, the NAN device is also in the DW. Reply to the corresponding NAN device with an SDF message.

The following explains the various types of information contained in the AM.

AMR, which generally has a maximum value of 8 bytes, is the value of MR of AM.

The maximum value of the MR is 8 bytes, which is calculated based on the MP value, the RF value, and the MAC address of the NAN device, indicating the willingness of the NAN device to be the master. The larger the value of MR, the higher the willingness of the NAN device to be master. MR can also be seen as an additional form of expression for MP.

MP, generally the maximum value is 1 byte, indicating the willingness of the NAN device to be the master. The larger the value of MP, the higher the willingness of the NAN device to be master.

AMP, generally the maximum value is 1 byte, which is the value of AM's MP.

The RF value is generally 1 byte and is a random number selected by the NAN device.

AMBTT, which is generally 4 bytes in length, indicates the transmission time of the Beacon frame of the AM. Generally, the NAN device that sends the Beacon frame carries the AMBTT, and is used for synchronization between other NAN devices and the AM corresponding to the AMBTT.

TSF, generally with a maximum value of 8 bytes, indicates that the synchronization function of the NAN device enables reception. The timer of the NAN device to the TSF is synchronized with the time of the AM corresponding to the NAN device transmitting the TSF. The TSF can also represent time information.

The cluster ID, which is a maximum of 6 bytes, is carried in the field of Address 3 in the Beacon frame.

CG, generally the maximum value is 8 bytes, indicating the level of the Cluster, used for comparison of different Clusters at the time of merging, and the Cluster with a small CG value is merged into the Cluster with a large CG value.

The following describes the SDF message.

An SDF message is an action frame specifically defined for service discovery. Depending on the function, SDF messages can be roughly classified into three types: SDF Publish (SDF Publishing) message, SDF Subscribe (SDF subscription) message, SDF. A Follow-Up message, in general, includes an indication bit in the SDF message indicating which SDF message the SDF message is.

SDF Publish message: used to publish the services that the NAN device can provide, or to reply to the received SDF Subscribe message sent by other NAN devices;

SDF Subscribe message: used to find the service that needs to be used;

SDF Follow-Up message: Used to reply to the received SDF Publish message or to negotiate more information.

The embodiments of the present invention can implement ranging between NAN devices based on the existing FTM (Fine Timing Measurement) ranging principle. The specific example of applying the FTM ranging principle in the embodiment of the present invention is described below.

1. First, a NAN device that initiates ranging (for example, hereinafter referred to as NAN device 1) sends an FTM Request (FTM Request) to the NAN device to which the NAN device 1 is to be measured (for example, hereinafter referred to as NAN device 2). ), for requesting a periodic time window, after receiving the FTM Request, the NAN device 2 can reply to the message according to its own resource situation and capability, etc., indicating that a time window is accepted or reset. Among them, FTM Request is an Action Frame.

2. If the NAN device 2 accepts the preset time window, both the NAN device 2 and the NAN device 1 start time capture. Wherein, the NAN device 2 captures the NAN device 2 and returns a pin to the NAN device 1. The time of the reply message to the FTM Request is t1, and the time at which the NAN device 1 captures the reply message of the NAN device 2 for the FTM Request is t2.

3. The NAN device 1 replies to the NAN device 2 with an ACK (Acknowledgement) for the reply message, and captures that the time at which the ACK is transmitted is t3, and the time at which the NAN device 2 captures the ACK is t4.

4. If the NAN device 1 is to complete the ranging, the NAN device 2 sends a ranging message to the NAN device 1, and the ranging message carries t1 and t4.

In this way, the NAN device 1 obtains four times of time t1, t2, t3, and t4, so that the time RTT (Round-Trip Time) of the message can be calculated as:

RTT=[(t4–t1)–(t3–t2)] (1)

It can then be calculated that the distance d between the NAN device 1 and the NAN device 2 is:

d=1/2*RTT*c (2)

Where c is the speed of light, which can also be equal to the transmission speed of the Wi-Fi signal.

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

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, unless otherwise specified, generally indicates that the contextual object is an "or" relationship.

The embodiment of the present invention is mainly described by taking a NAN device as an example, but the technical solution of the embodiment of the present invention can also be applied to other wireless devices in a similar network mechanism.

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

Referring to FIG. 1, an embodiment of the present invention provides a method for measuring distance between first NAN devices, and a main process of the method is described as follows.

Step 101: The first NAN device sends a first message in the DW, where the first message carries ranging trigger information for triggering the second NAN device to perform ranging, and information of the first time window; The discovery window is a time window for performing service discovery in the NAN, and the first message is a message for performing service discovery, and the first time window is a time window for performing ranging.

In the embodiment of the present invention, the NAN device that initiates ranging is referred to as a first NAN device, and the NAN device that receives ranging is referred to as a second NAN device.

In the embodiment of the present invention, the first time window is, for example, a service window (Service Window, SW). In the embodiment of the present invention, the first time window is a time window for performing ranging, that is, a service for performing ranging. window.

In the embodiment of the present invention, the first time window may be adjacent to the DW, that is, the end point of the DW is the start point of the first time window, that is, the interval length between the DW and the first time window is equal to zero. For example, DW is DW, the first time window may be an adjacent time period after the end of DW, or for example, DW is the first part time period in DW, the first time window is the second part time period in DW, and DW The end point is the starting point of the first time window, that is, the first time window is all the remaining time periods after the end of the first part of the time period in the DW; or, the interval between the first time window and the DW may be longer, and the interval duration is greater than 0. For example, DW is DW, the first time window may be a time period after a period of time after the end of DW, or for example, DW is a first part time period in DW, and the first time window is a second part time period in DW, and The interval between the DW and the first time window is greater than 0, that is, the first time window is a portion of the remaining time period after the end of the first portion of the time period in the DW.

Optionally, in the embodiment of the present invention, the first message may be a message for performing service discovery, where the message may carry service information subscribed or published by the first NAN device.

Optionally, in the embodiment of the present invention, the ranging itself may also be a service, and the service corresponding to the service information may also be ranging, that is, the service information is used to indicate that the first NAN device needs to be subscribed to the ranging. The service or the first NAN device needs to publish information about the ranging service.

Specifically, in the embodiment of the present invention, the first message may be an SDF message.

That is, in the DW, the first NAN device sends the first message, and the service information carried in the first message may be, for example, service subscription information for subscribing (also referred to as querying) the service required by the first NAN device, or It may be service release information for publishing a service that the first NAN device can provide, and the like.

The service information is information that can represent a service subscribed or published by the first NAN device, and may be a service name or a conversion value of the service name, for example, a value obtained by hashing the service name, such as a service. The name is SHA (Secure Hash Algorithm)-256 operation and takes the value of the first 48 bits as the service information; or the value of the bitmap mapping of the service name, for example, the Bloom Filter for the service name. (a binary vector data structure) transformation, using a bitmap to indicate the service name, and so on. The service corresponding to the service information may be a service that the first NAN device itself needs to subscribe to or publish, or a service that the other NAN device needs to subscribe to or publish for the first NAN device, and the present invention is not limited thereto.

For example, if the first message is an SDF Publish message, the service information carried in the first message is service information for publishing a service that the first NAN device can provide, and if the first message is an SDF Subscribe message, The service information carried in the first message is service information for subscribing to a service that the first NAN device needs to use.

In the embodiment of the present invention, the ranging trigger information is carried in the first message and sent, so that the ranging trigger can be performed in the DW, and the ranging triggering can be performed in other time windows without waiting for the DW to end. It saves the time required for ranging and reduces the amount of information interaction.

In addition, the first message may also carry information of the first time window.

The information of the first time window may include a start time of the first time window and a duration of the first time window, or may include a start time and a stop time of the first time window, or the first time window information The information of the first time window is not limited. .

The first NAN device sends the first message, and may send the first message in different forms, such as broadcast, multicast, or unicast. After receiving the first message, the second NAN device may parse the first message, and The ranging trigger information carried therein is obtained, and the service information carried therein and the like are further obtained.

Optionally, in the embodiment of the present invention, the ranging trigger information may include one of ranging principle indication information, ranging protocol indication information, ranging requirement indication information, ranging requirement indication information, and ranging opening indication information. Or any of them; among them,

The ranging principle indication information is used to indicate the measurement principle on which the distance measurement is performed;

The ranging request indication information is used to indicate a requirement for a parameter that needs to be satisfied for the measured distance;

The ranging demand indication information is used to indicate a demand for a distance of the NAN device that satisfies the service information;

Specifically, the ranging principle indication information or the ranging protocol indication information may be used to indicate that the ranging method is based on the FTM principle, or the ranging scheme based on the triangulation principle is used for ranging, and further, the ranging triggering The information may include multiple supported ranging schemes, and the second NAN device may select from the support according to its own support situation or further negotiate with the first NAN device to determine the final ranging scheme.

Specifically, the ranging requirement indication information may include requirements of the first NAN device for ranging accuracy, ranging range, and the like.

Specifically, the ranging requirement indication information may include a distance requirement of the first NAN device to the NAN device that satisfies the service of the subscription or the search.

Specifically, the ranging open indication information may include information indicating that the second NAN device turns on the ranging function.

For example, in a possible implementation, the first NAN device and the second NAN device support a certain ranging solution by default. For example, the first NAN device and the second NAN device respectively support the FTM principle-based ranging solution. The ranging trigger information may include only the ranging opening indication information.

In this embodiment of the present invention, the first NAN device may send the first message to the second NAN device in the first channel.

Step 102: The first NAN device receives the second message sent by the second NAN device, obtains a first time to receive the second message, and determines, according to the second message, the measurement of the second NAN device. From the capability, the second message is a response message for the first message.

Optionally, in the embodiment of the present invention, the second message is a response message for the first message, for example, the second message may be an SDF message, and may be an SDF Publish message or an SDF Follow-up message. For example, when the first message is an SDF Subscribe message, the second message may be an SDF Publish message in response to the message; when the first message is an SDF Publish message, the second message may be an SDF Follow-Up message in response to the message.

After receiving the first message, the second NAN device may determine, according to the ranging trigger information in the first message, whether it has the corresponding ranging capability, and send the first message to the first NAN device according to the determination result. Two messages.

In the embodiment of the present invention, the second NAN device has the corresponding ranging capability indicated by the first NAN device, and may have several different situations:

1. The second NAN device needs to satisfy the service information carried in the first message, and the second NAN device is to be able to support ranging.

For example, the service information is information for subscribing to a service required by the first NAN device, and the second NAN device needs to be able to provide the service, or for example, the service information is information for publishing a service that the first NAN device can provide. The second NAN device needs to accept the service.

And, the second NAN device needs to support the ranging indicated by the first NAN device.

For example, when the ranging trigger information includes the ranging principle indication information, the second NAN device determines whether it supports the ranging principle indicated by the ranging principle indication information, and if so, indicates that the second NAN device owns the first NAN. The ranging capability indicated by the device;

Or, for example, when the ranging trigger information includes the ranging protocol indication information, the second NAN device determines whether it supports the ranging protocol indicated by the ranging protocol indication information, and if so, indicates that the second NAN device has the first Ranging capability indicated by the NAN device;

Or, for example, when the ranging trigger information includes the ranging request indication information, the second NAN device determines whether it can satisfy the ranging accuracy, the ranging range, and the like indicated by the ranging request indication information, and if yes, indicates The second NAN device has a ranging capability indicated by the first NAN device;

Or, for example, when the ranging trigger information includes the ranging demand indication information, the second NAN device determines whether it can satisfy the distance requirement indicated by the ranging demand indication information, and if yes, indicates that the second NAN device has the first The ranging capability indicated by a NAN device;

Or, for example, when the ranging triggering information includes the ranging opening indication information, the second NAN device determines whether it is currently capable of turning on the ranging function, and if so, indicating that the second NAN device has the ranging indicated by the first NAN device. ability.

Or for example, the ranging trigger information includes ranging requirement information and ranging principle indication information. The second NAN device learns that the service of the first NAN device needs the distance between the second NAN device and the first NAN device to reach a certain threshold by using the ranging requirement indication information, and further, the second NAN device passes the ranging. The principle indication information is related to the ranging technology supported by the first NAN device. When the second NAN device supports the ranging technology, the second NAN device determines to support the ranging.

Or, for example, the ranging trigger information includes the ranging open indication information, and the first NAN device and the second NAN device support some ranging technology by default, and the second NAN device determines to support the ranging.

Or for example, the ranging trigger information includes ranging request information and ranging protocol indication information. The second NAN device learns that the service of the first NAN device needs the distance between the second NAN device and the first NAN device to meet a certain parameter to establish a service connection, and further, the second NAN device passes the distance determination request indication information. The ranging protocol indication information is related to the ranging protocol supported by the first NAN device. When the second NAN device supports the ranging protocol, the second NAN device determines to support the ranging.

That is, in this case, the second NAN device needs to be able to satisfy the service information carried in the first message, and the second NAN device can support the ranging required by the first NAN device, and both of the conditions are satisfied. The second message sent by the second NAN device to the first NAN device indicates that the second NAN device supports the ranging. Otherwise, the second information that the second NAN device replies to the first NAN device indicates that the second NAN device does not support the measurement. distance.

In a possible case, the service subscribed or issued by the first NAN device is the ranging, that is, the ranging is the service corresponding to the service information, and at this time, the second NAN device determines whether it can satisfy the The service corresponding to the service information is essentially the determination of whether or not the support for the first NAN device is required.

Second, the second NAN device can support ranging.

That is, in this case, the second NAN device does not matter whether the service information carried in the first message can be satisfied, as long as the second NAN device can support the ranging required by the first NAN device, the second NAN device The second information replied by the first NAN device may indicate that the second NAN device supports ranging.

Optionally, in the embodiment of the present invention, the first NAN device receives the second message sent by the second NAN device, including:

The first NAN device receives the second message in the DW or the first time window.

That is, the second NAN device may continue to send the second message to the first NAN device in the DW, or the second NAN device may also send the second message to the first NAN device in the first time window.

Of course, the second message may also be used to indicate whether the second NAN device satisfies the service information in the first message.

For example, the second message may be an SDF message, and may be an SDF Publish message or an SDF Follow-up message. For example, when the first message is an SDF Subscribe message, the second message may be an SDF Publish message in response to the message; when the first message is an SDF Publish message, the second message may be an SDF Follow-Up message in response to the message.

The second message is sent by the second NAN device on the first channel in the DW. After receiving the second message, the first NAN device may determine whether the second NAN device meets the service subscribed or published by the first NAN device, and The ranging capability of the second NAN device can be determined.

For example, the second message may also be a service connection message, and the second message may be sent by the second NAN device on the second channel in the first time window for requesting a service connection with the first NAN device, for example, the service connection message is specific. For associated messages (including but not limited to Association Request) After the first NAN device receives the second message, the first NAN device determines the ranging capability of the second NAN device and obtains the first parameter group information.

The second channel represents an operating channel in which the first NAN device establishes a service with other NAN devices, and the channel may be other channels different from the first channel, or may be the same channel as the first channel.

In addition, in the embodiment of the present invention, the first channel is considered to be associated with the DW, and the second channel is associated with the first time window, that is, the message transmitted in the DW is transmitted through the first channel, in the first time window. The transmitted messages are transmitted through the second channel.

Step 103: The first NAN device sends a third message to the second NAN device, obtains a second time to send the third message, and obtains a first parameter group according to the first time and the second time. The first parameter group information is used to obtain a distance between the first NAN device and the second NAN device, and the third message is an acknowledgement message for the second message.

After receiving the second message, the first NAN device sends an acknowledgement message for the second message to the second NAN device, that is, sends a third message, for example, the third message is specifically an ACK.

Optionally, in the embodiment of the present invention, the first NAN device may directly use the first time and the second time as the first parameter group information, or the first NAN device may also process the first time and the second time. The information obtained after the processing is used as the first parameter group information. The specific form of the first parameter group information is not limited in the embodiment of the present invention, as long as the second NAN device can obtain the first time and the second time according to the first parameter group information. Just fine.

The third message may be sent in the DW or may also be sent in the first time window.

Optionally, in the embodiment of the present invention, after obtaining the first parameter group information according to the first time and the second time, the method further includes:

Transmitting, by the first NAN device, the first parameter group information to the second NAN device in the first time window; the first parameter group information is used by the second NAN device according to the A parameter group information and the second parameter group information obtain a distance between the first NAN device and the second NAN device.

That is, if the second NAN device also needs to obtain the distance between the first NAN device and the second NAN device, the first NAN device may send the first parameter group information to the second NAN device, so that the second NAN device can be The first parameter group information and the second parameter group information obtain a distance between the first NAN device and the second NAN device. The second parameter group information will be introduced in step 104.

Specifically, if the ranging is performed according to the FTM ranging principle, the manner in which the second NAN device obtains the distance between the first NAN device and the second NAN device according to the first parameter group information and the second parameter group information may refer to a formula. (1) and formula (2). At this time, the first time is t2, the second time is t3, the third time is t1, and the fourth time is t4. It should be noted that ranging based on the FTM principle is only one possible implementation solution of the present invention, but is not limited thereto. For example, ranging can also be implemented according to the principles of triangulation ranging, signal strength ranging, and the like.

Step 104: The first NAN device receives, in the first time window, second parameter group information that is sent by the second NAN device, where the first NAN device is configured according to the first parameter group information. The second parameter group information obtains a distance between the first NAN device and the second NAN device; and/or, the first NAN device sends the second NAN device to the second NAN device in a first time window The first parameter group information, so that the second NAN device obtains a distance between the first NAN device and the second NAN device according to the first parameter group information and the second parameter group information.

That is, in the embodiment of the present invention, when the parameter group information required for the ranging is transmitted, it may be transmitted in the first time window, and may also be transmitted in other time periods, and the present invention is not limited thereto.

The second NAN device may obtain second parameter group information, which is also information for obtaining a distance between the first NAN device and the second NAN device.

For example, the second NAN device can capture the third moment of transmitting the second message, and capture and receive Confirming the fourth moment of the message, and obtaining the second parameter group information according to the third moment and the fourth moment.

The second NAN device may directly use the third time and the fourth time as the second parameter group information, or the second NAN device may process the third time and the fourth time, and the obtained information is used as the first The second parameter group information is not limited in the embodiment of the present invention. The first NAN device can obtain the third time and the fourth time according to the second parameter group information.

In the embodiment of the present invention, the second NAN device may separately send the second parameter group information to the first NAN device, or may also carry the second parameter group information in the service connection message for sending.

For example, if the second parameter group information is carried in the service connection message for sending, the service connection message may be used to indicate that the second NAN device is to be established with the first NAN device, in addition to carrying the second parameter group information. A service connection, such as a related message (including but not limited to an Association Request, an Association Response message, etc.), a message for paging, and the like.

After receiving the second parameter group information, the first NAN device may obtain the distance between the first NAN device and the second NAN device according to the first parameter group information and the second parameter group information, specifically, according to the FTM ranging. The principle is to perform ranging, and the manner in which the first NAN device obtains the distance between the first NAN device and the second NAN device according to the first parameter group information and the second parameter group information may refer to formula (1) and formula (2). . At this time, the first time is t2, the second time is t3, the third time is t1, and the fourth time is t4. Similarly, ranging based on the FTM principle is only one possible implementation of the present invention, but is not limited thereto.

After receiving the second parameter group information, the first NAN device obtains a distance between the first NAN device and the second NAN device according to the second parameter group information and the first parameter group information, for example, it is referred to as a first distance, and thus A NAN device can determine whether to establish a service connection with the second NAN device according to the first distance.

For example, when the first distance satisfies the distance threshold of the subscribed or published service set by the first NAN device, the first NAN device confirms that the service connection is established with the second NAN device, and the first NAN device replies with the service connection response to the second NAN device. Message, such as when the service connection message is Association When the request is received, the service connection response message replied by the first NAN device may be an Association Response to instruct the second NAN device to perform a subsequent connection process.

Or for example, when the first distance does not meet the distance threshold of the subscribed or published service set by the first NAN device, if the service connection message is a Paging request message, the service connection response message replied by the first NAN device may be a Paging response message. And indicates that the service connection is terminated, as indicated by Status: Fail. Further, the first NAN device may also indicate the reason for the service termination, such as indicating the Reason Code: Out-of-Range.

Or for example, when the first distance satisfies a distance threshold of the subscribed or published service set by the first NAN device, the first NAN device confirms establishing a service connection with the second NAN device, and determines to provide the first type for the first NAN device subsequently. Services, such as providing video file sharing services. The first NAN device replies to the second NAN device with a service connection response message. For example, when the service connection message is an Association Request, the service connection response message replied by the first NAN device may be an Association Response to indicate that the second NAN device performs subsequent connection. process.

Or for example, when the first distance does not satisfy the distance threshold of the subscribed or published service set by the first NAN device, the first NAN device confirms establishing a service connection with the second NAN device, and determines to provide the second NAN device subsequently. Services, such as providing advertising push services. The first NAN device replies to the second NAN device with a service connection response message. For example, when the service connection message is an Association Request, the service connection response message replied by the first NAN device may be an Association Response to indicate that the second NAN device performs subsequent connection. process.

That is, the first NAN device may determine whether to establish a service connection with the second NAN device according to the distance between the first NAN device and the second NAN device, or the first NAN device may also be according to the first NAN device and the second NAN device. The distance between the determinations is specifically what the second NAN device provides, and so on, and the same is true for the second NAN device, and no more examples are given here. Specifically, the effects of the distance obtained by the ranging are all possible embodiments, and the present invention is not limited thereto.

Optionally, in the embodiment of the present invention, if the first NAN device receives the second parameter group information sent by the second NAN device in the first time window, according to the first moment with After the obtaining, by the second moment, the first parameter group information, the method further includes:

Then, if the first NAN device is to obtain the distance between the first NAN device and the second NAN device, and if the second NAN device also needs to obtain the distance between the first NAN device and the second NAN device, the first NAN The device may also send the first parameter group information to the second NAN device, so that the second NAN device can also obtain the distance between the first NAN device and the second NAN device, and meet the requirement that the two NAN devices simultaneously obtain the distance.

Optionally, in the embodiment of the present invention, if the first NAN device receives the second parameter group information sent by the second NAN device in the first time window, obtain the first NAN After the distance between the device and the second NAN device, the method further includes:

The first NAN device sends the obtained distance between the first NAN device and the second NAN device to the second NAN device.

That is, if the first NAN device is to obtain the distance between the first NAN device and the second NAN device, and if the second NAN device also needs to obtain the distance between the first NAN device and the second NAN device, the first NAN The device may send the first parameter group information to the second NAN device in addition to the distance between the first NAN device and the second NAN device, and then directly send the obtained distance to the second NAN device. The second NAN device does not need to perform calculations to alleviate the workload of the second NAN device.

Optionally, in the embodiment of the present invention, if the first NAN device sends the first parameter group information to the second NAN device in a first time window,

After the first NAN device sends the third message to the second NAN device, the method further includes:

Receiving, by the first NAN device, the second parameter group information sent by the second NAN device in a first time window;

After obtaining the first parameter group information according to the first time and the second time, the method further includes:

Obtaining a distance between the first NAN device and the second NAN device according to the first parameter group information and the second parameter group information.

That is, if the second NAN device is to obtain the distance between the first NAN device and the second NAN device, and if the first NAN device also needs to obtain the distance between the first NAN device and the second NAN device, the second NAN The device may also send the second parameter group information to the first NAN device, so that the first NAN device can also obtain the distance between the first NAN device and the second NAN device, and meet the requirement that the two NAN devices simultaneously obtain the distance.

Optionally, in the embodiment of the present invention, if the first NAN device sends the first parameter group information to the second NAN device in the first time window, then the first NAN device is in the first time window. After the second NAN device sends the first parameter group information, the method further includes:

The first NAN device receives the distance between the first NAN device and the second NAN device that is sent by the second NAN device.

That is, if the second NAN device is to obtain the distance between the first NAN device and the second NAN device, and if the first NAN device also needs to obtain the distance between the first NAN device and the second NAN device, the second NAN The device may send the second parameter group information to the first NAN device, and after obtaining the distance between the first NAN device and the second NAN device, directly send the obtained distance to the first NAN device. The first NAN device does not need to perform calculations, reducing the workload of the first NAN device.

Among them, the content not detailed in the process of FIG. 1 is introduced in the subsequent process of FIG. 2, and related content can refer to each other.

Referring to FIG. 2, based on the same inventive concept, an embodiment of the present invention provides a distance measurement method between second NAN devices, and the main flow of the method is as follows.

Step 201: The second NAN device receives the first message sent by the first NAN device in the DW, where the first message carries the ranging trigger information for triggering the second NAN device to perform ranging, and the first time Information of the window; the discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging.

Step 202: The second NAN device sends a second message to the first NAN device to obtain a third moment to send the second message, where the second message is used to indicate ranging of the second NAN device. Capability, the second message is a response message for the first message;

Step 203: The second NAN device receives the third message sent by the first NAN device, obtains a fourth time to receive the third message, and obtains a second parameter according to the third time and the fourth time. Group information; the second parameter group information is used to obtain a distance between the first NAN device and the second NAN device, and the third message is an acknowledgement message for the second message;

Step 204: The first NAN device receives, in a first time window, first parameter group information sent by the first NAN device, where the second NAN device is configured according to the first parameter group information and the second Parameter group information, obtaining a distance between the first NAN device and the second NAN device; and/or, the second NAN device transmitting the the NAN device to the first NAN device in a first time window a second parameter group information, so that the first NAN device obtains a distance between the first NAN device and the second NAN device according to the second parameter group information and the first parameter group information.

In the embodiment of the present invention, the first time window may be adjacent to the DW, that is, the end point of the DW is the start point of the first time window, that is, the interval length between the DW and the first time window is equal to zero. For example, DW is DW, the first time window may be an adjacent time period after the end of DW, or for example, DW is the first part time period in DW, the first time window is the second part time period in DW, and DW The end point is the starting point of the first time window, that is, the first time window is all the remaining time periods after the end of the first part of the time period in the DW; or, the interval between the first time window and the DW may be longer, and the interval duration is greater than 0. For example, if DW is DW, the first time window can be after a period of time after the end of DW. The time period, or for example, the DW is the first partial time period in the DW, the first time window is the second partial time period in the DW, and the interval between the DW and the first time window is greater than 0, that is, the first time The window is the remaining time period after the end of the first part of the DW.

Optionally, in the embodiment of the present invention, the first message carries the service information subscribed or issued by the first NAN device.

Optionally, in the embodiment of the present invention, the second message is a response message for the first message. For example, the second message may be an SDF message, and may be an SDF Publish message or an SDF Follow-up message. For example, when the first message is an SDF Subscribe message, the second message may be an SDF Publish message in response to the message; when the first message is an SDF Publish message, the second message may be an SDF Follow-Up message in response to the message.

Optionally, in the embodiment of the present invention, the third message is an acknowledgement message for the second message.

Optionally, in the embodiment of the present invention, the second NAN device sends the second message to the first NAN device, including:

The second NAN device transmits a second message to the first NAN device in the DW or the first time window.

Optionally, in the embodiment of the present invention, the ranging trigger information includes one of a ranging principle indication information, a ranging protocol indication information, a ranging requirement indication information, a ranging requirement indication information, and a ranging opening indication information. Any of them; among them,

The ranging open indication information is used to instruct the second NAN device to turn on the ranging function.

In the embodiment of the present invention, the second NAN device has the corresponding ranging capability indicated by the first NAN device, and may have several different situations, which are described in the flow of FIG. 1.

Optionally, in the embodiment of the present invention, the second NAN device may directly use the third time and the fourth time as the second parameter group information, or the second NAN device may also process the third time and the fourth time. The information obtained after the processing is used as the second parameter group information. The specific form of the second parameter group information is not limited in the embodiment of the present invention, as long as the first NAN device can obtain the third time and the fourth time according to the second parameter group information. Just fine.

Optionally, in the embodiment of the present invention, if the second NAN device receives the first parameter group information sent by the first NAN device in the first time window, obtaining the second parameter according to the third time and the fourth time After the group information, it also includes:

The second NAN device sends the second parameter group information to the first NAN device in the first time window; the second parameter group information is used by the first NAN device to obtain the first NAN according to the first parameter group information and the second parameter group information. The distance between the device and the second NAN device.

Then, if the second NAN device is to obtain the distance between the first NAN device and the second NAN device, and if the first NAN device also needs to obtain the distance between the first NAN device and the second NAN device, the second NAN The device may also send the second parameter group information to the first NAN device, so that the first NAN device can also obtain the distance between the first NAN device and the second NAN device, and meet the requirement that the two NAN devices simultaneously obtain the distance.

Optionally, in the embodiment of the present invention, if the second NAN device receives the first parameter group information sent by the first NAN device in the first time window, the second NAN device performs the first parameter group information according to the first parameter group information. After obtaining the distance between the first NAN device and the second NAN device, the parameter information includes:

The second NAN device transmits the obtained distance between the first NAN device and the second NAN device to the first NAN device.

That is, if the second NAN device is to obtain the distance between the first NAN device and the second NAN device, and if the first NAN device also needs to obtain the distance between the first NAN device and the second NAN device, the second NAN The device can send the second parameter group information to the first NAN device. In addition, after obtaining the distance between the first NAN device and the second NAN device, the obtained distance can be directly sent to the first NAN device, so that the first NAN device does not need to perform calculation, and the first NAN device is mitigated. The amount of work.

Optionally, in the embodiment of the present invention, if the second NAN device sends the second parameter group information to the first NAN device in the first time window, the second NAN device receives the third information sent by the first NAN device. After the news, it also includes:

The first NAN device receives the first parameter group information sent by the first NAN device in the first time window, where the first parameter group information is that the first NAN device receives the third message according to the first time, and sends the third message. Obtained at the second moment;

After obtaining the second parameter group information according to the third time and the fourth time, the method further includes:

That is, if the first NAN device is to obtain the distance between the first NAN device and the second NAN device, and if the second NAN device also needs to obtain the distance between the first NAN device and the second NAN device, the first NAN The device may send the obtained first parameter group information to the second NAN device, so that the second NAN device can also obtain the distance between the first NAN device and the second NAN device, and meet the requirement that the two NAN devices simultaneously obtain the distance. .

Optionally, in the embodiment of the present invention, if the second NAN device sends the second parameter group information to the first NAN device in the first time window, then the second NAN device is in the first time window. After the NAN device sends the second parameter group information, the method further includes:

The second NAN device receives the distance between the first NAN device and the second NAN device that is sent by the first NAN device.

That is, if the first NAN device is to obtain the distance between the first NAN device and the second NAN device, and if the second NAN device also needs to obtain the distance between the first NAN device and the second NAN device, the first NAN The device may send the first parameter group information to the second NAN device in addition to the distance between the first NAN device and the second NAN device, and then directly send the obtained distance to the second NAN device. The second NAN device does not need to be calculated again. Reduce the workload of the second NAN device.

Among them, the contents that are not described in detail in the flow of Figure 2 are introduced in the flow of Figure 1, and can be referred to each other.

Two methods are described below to illustrate the method of distance measurement between NAN devices in the embodiments of the present invention.

Please refer to FIG. 3 , which is a first specific example of distance measurement between NAN devices in an embodiment of the present invention. The following is a detailed description of the process shown in FIG. 3 .

Step 1: The first NAN device sends an SDF Subscribe message on the first channel in the DW. The SDF Subscribe message includes a Service ID (Service Identity) of the service that the first NAN device needs to subscribe to, ranging trigger information based on the FTM principle, information of the SW, and information of the second channel establishing the service connection.

The FTM ranging in the embodiment of the present invention refers to the ranging based on the FTM ranging principle, and is not limited to the FTM ranging procedure specified in the IEEE P802.11-REVmc standard.

Step 2: After receiving the SDF Subscribe message, the second NAN device determines that the service indicated by the Service ID can be provided, starts FTM ranging, returns an SDF Publish message to the first NAN device, and obtains a sending time of sending the SDF Publish message. For example, this time is referred to as t1.

The first NAN device receives the SDF Publish message and obtains the time to receive the SDF Publish message, for example, the time is referred to as t2.

Step 3: The first NAN device sends an ACK message for the SDF Publish message to the second NAN device, and obtains a time to send the ACK message, for example, the time is referred to as t3.

The second NAN device receives the ACK message and obtains the time to receive the ACK message, for example, the time is referred to as t4.

Step 4: After the DW ends, the second NAN device switches to the second channel according to the information of the second channel, and sends a service connection message to the first NAN device in the SW (for example, connecting the service) The message is called the first service connection message). Similarly, the first NAN device also temporarily switches to the second channel at SW time. The first service connection message sent by the second NAN device, including t1 and t4. For example, the first service connection message may be a Paging message or Association Request and other news.

After receiving the first service connection message, the first NAN device may obtain the RTT according to formula (1) according to t1, t4, and t2 and t3 captured by the first NAN device, and may calculate and the second NAN according to formula (2). The distance between the devices, for example, the calculated distance is d1.

Step 5: When the first NAN device is set to query only the service within a certain distance d1', the first NAN device determines whether d1 satisfies d1<d1'. When satisfied, the first NAN device returns a second service to the second NAN device. The connection message, such as the second service connection message, is a Paging message or an Association Response message.

Further, the first NAN device may also carry t2 and t3 in the second service connection message, where the second NAN device calculates the distance from the first NAN device, or the first NAN device may also be in the second service connection message. The calculated distance d1 is carried in, so that the second NAN device directly obtains d1. Similarly, when the second NAN device is configured to provide the service only to the NAN device within a certain distance d2', the second NAN device determines whether the obtained distance between the first NAN device and the second NAN device is less than d2', If yes, continue with the service establishment process.

It should be noted that the lengths of the DW and the SW shown in FIG. 3 are only for explaining the technical solutions in the embodiment of the present invention, and do not represent the actual lengths of the DW and the SW. That is, in practical applications, the durations of DW and SW may be equal or may not be equal. If they are not equal, the duration of DW may be longer, or the duration of SW may be longer.

4 is a second specific example of distance measurement between NAN devices in an embodiment of the present invention. The following is a detailed description of the process shown in FIG. 4.

Step 1: The first NAN device sends an SDF Subscribe message on the first channel in the DW. The SDF Subscribe message includes a Service ID of a service that the first NAN device needs to subscribe to, a ranging trigger information based on the FTM principle, information of the SW, and information of a second channel establishing a service connection.

Step 2: After receiving the SDF Subscribe message, the second NAN device determines that the service indicated by the Service ID can be provided, and starts FTM ranging. When the SW period arrives, it runs on the second channel, and returns an SDF Publish message to the first NAN device in the SW, and obtains a message. The sending time of the SDF Publish message is sent, for example, this time is called t1.

Step 4: The first NAN device sends a service connection message to the second NAN device, and carries the first parameter group information in the service connection message, for example, the first parameter group information includes t2 and t3, so that the second NAN device obtains t2 and T3, and calculate the distance between the first NAN device and the second NAN device.

The second NAN device may determine whether to perform subsequent service connection establishment with the first NAN device according to the obtained distance.

It should be noted that the lengths of the DW and the SW shown in FIG. 4 are only for explaining the technical solutions in the embodiment of the present invention, and do not represent the actual lengths of the DW and the SW. That is, in practical applications, the durations of DW and SW may be equal or may not be equal. If they are not equal, the duration of DW may be longer, or the duration of SW may be longer.

In the embodiment of the present invention, if the first NAN device wants to measure the distance between the second NAN device and the second NAN device, the first NAN device may carry the ranging trigger information in the first message, so that the first message may be in the DW. Transmitting, and if the second NAN device supports ranging, the second NAN device sends the second parameter group information to the first NAN device in the first time window, so that the first NAN device can obtain the first NAN. The distance between the device and the second NAN device, or the first NAN device may also send the obtained first parameter group information to the second NAN device, so that the second NAN device obtains the first NAN device and the second NAN device. The distance between them. For example, in the embodiment of the present invention, the ranging trigger can be performed in the DW, and the ranging triggering is not required after the DW is completed, thereby saving the time required for ranging and improving the time. Ranging efficiency.

Moreover, in the embodiment of the present invention, the ranging trigger information can be carried in the first message, and does not need to be sent separately as in the prior art, which reduces the amount of information interaction and saves network resources.

The NAN device in the embodiment of the present invention is described below with reference to the accompanying drawings.

Referring to FIG. 5, based on the same inventive concept, an embodiment of the present invention provides a NAN device, which may be a first NAN device as described above. The NAN device can include a sending module 501 and a determining module 502.

The sending module 501 is configured to send a first message in the DW, where the first message carries ranging trigger information for triggering the second NAN device to perform ranging, and information of the first time window; the discovery The window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging;

a determining module 502, configured to receive a second message sent by the second NAN device, obtain a first time to receive the second message, and determine a ranging capability of the second NAN device according to the second message, The second message is a response message for the first message;

The sending module 501 is further configured to send a third message to the second NAN device, obtain a second time to send the third message, and obtain first parameter group information according to the first time and the second time; The first parameter group information is used to obtain a distance between the NAN device and the second NAN device, where the third message is an acknowledgement message for the second message;

The determining module 502 is further configured to receive the second parameter group information sent by the second NAN device in the first time window, and obtain the location according to the first parameter group information and the second parameter group information. The distance between the NAN device and the second NAN device; and/or the sending module 501 is further configured to send the first parameter group information to the second NAN device in a first time window, so that Obtaining, by the second NAN device, a distance between the NAN device and the second NAN device according to the first parameter group information and the second parameter group information;

Optionally, in the embodiment of the present invention, the first message is an SDF message in the NAN, and the first message carries the service information subscribed or issued by the first NAN device.

Optionally, in the embodiment of the present invention, the determining module 502 is configured to receive the second message sent by the second NAN device, specifically:

Receiving the second message in the discovery window or the first time window.

Optionally, in the embodiment of the present invention, the ranging trigger information includes one of a ranging principle indication information, a ranging protocol indication information, a ranging requirement indication information, a ranging requirement indication information, and a ranging opening indication information. Kind or any of them; among them,

Since the first NAN device is the same device as the first NAN device in the method described in the flow of FIG. 1, the content not described in the device portion may be referred to the description of the method portion.

Referring to FIG. 6, based on the same inventive concept, an embodiment of the present invention provides another NAN device, which may be a second NAN device as described above. The NAN device may include a receiving module 601 and an obtaining module 602.

The receiving module 601 is configured to receive, in the DW, the first message sent by the first NAN device, where the first message carries the ranging trigger information for triggering the NAN device to perform ranging, and the information of the first time window. The discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging;

The obtaining module 602 is configured to send a second message to the first NAN device, to obtain a third time to send the second message, where the second message is used to indicate a ranging capability of the NAN device, where The second message is a response message for the first message;

The receiving module 601 is further configured to receive a third message sent by the first NAN device, obtain a fourth time to receive the third message, and obtain second parameter group information according to the third time and the fourth time The second parameter group information is used to obtain a distance between the first NAN device and the NAN device, and the third message is an acknowledgement message for the second message;

The receiving module 601 is further configured to receive the first parameter group information sent by the first NAN device in the first time window, and obtain the first parameter according to the first parameter group information and the second parameter group information. a distance between a NAN device and the NAN device; and/or an obtaining module 602, configured to send the second parameter group information to the first NAN device in a first time window, so that Obtaining, by the first NAN device, a distance between the first NAN device and the NAN device according to the second parameter group information and the first parameter group information;

The first parameter group information is: the first time that the first NAN device obtains the second message, and the second time that the third message is sent, according to the first time and the The parameter group information obtained at the second moment is used to obtain a distance between the first NAN device and the NAN device.

Optionally, in the embodiment of the present invention, the acquiring module 602 is configured to send the second message to the first NAN device, specifically:

Since the second NAN device is the same device as the second NAN device in the method described in the flow of FIG. 2, for the content not introduced in the device part, reference may be made to the description of the method part.

Referring to FIG. 7, based on the same inventive concept, an embodiment of the present invention provides a NAN device, which may be a first NAN device as described above. The NAN device can include a memory 701, a processor 702, and a transceiver 703 that are coupled to the bus 700.

The memory 701 is configured to store an instruction required by the processor 702 to perform a task;

The transceiver 703 is configured to send a first message in the discovery window DW, where the first message carries the ranging trigger information for triggering the second NAN device to perform ranging, and the information of the first time window; The discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, the first time window is a time window for performing ranging, and receiving the a second message sent by the second NAN device;

The processor 702 is configured to execute the instruction, obtain a first time to receive the second message, and determine a ranging capability of the second NAN device according to the second message, where the second message is for a response message describing the first message;

The transceiver 703 is further configured to send a third message to the second NAN device.

The processor 702 is further configured to obtain a second time when the third message is sent, and obtain first parameter group information according to the first time and the second time; the first parameter group information is used to obtain the a distance between the NAN device and the second NAN device, the third message being an acknowledgement message for the second message;

The transceiver 703 is further configured to receive the second parameter group information sent by the second NAN device in the first time window, where the processor 702 is further configured to use the first parameter group information and the The second parameter group information is obtained, and the distance between the NAN device and the second NAN device is obtained; and/or the transceiver 703 is further configured to send the the NN device to the second NAN device in the first time window. a first parameter group information, so that the second NAN device obtains a distance between the NAN device and the second NAN device according to the first parameter group information and the second parameter group information;

Optionally, in the embodiment of the present invention, the transceiver 703 is configured to receive the second message sent by the second NAN device, specifically:

Receiving the second message in the discovery window or the first time window.

Referring to FIG. 8, based on the same inventive concept, an embodiment of the present invention provides another NAN device, which may be a second NAN device as described above. The NAN device can include a memory 801, a processor 802, and a transceiver 803 that are coupled to bus 800.

The memory 801 is configured to store an instruction required by the processor 802 to perform a task;

The transceiver 803 is configured to receive, in the DW, a first message sent by the first NAN device, where the first message carries ranging trigger information for triggering the NAN device to perform ranging, and information of the first time window. The discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging; The first NAN device sends a second message;

The processor 802 is configured to execute the instruction, obtain a third moment to send the second message, where the second message is used to indicate ranging capability of the NAN device, and the second message is for the first a response message to a message;

The transceiver 803 is further configured to receive a third message sent by the first NAN device;

The processor 802 is further configured to obtain a fourth moment to receive the third message, obtain second parameter group information according to the third moment and the fourth moment, where the second parameter group information is used to obtain the a distance between the first NAN device and the NAN device, the third message being an acknowledgement message for the second message;

The transceiver 803 is further configured to receive the first parameter group information sent by the first NAN device in a first time window, where the processor 802 is further configured to use, according to the first parameter group information and the second parameter Group information, obtaining a distance between the first NAN device and the NAN device; and/or, the transceiver 803 is further configured to send the second to the first NAN device in a first time window Parameter group information, so that the first NAN device obtains a distance between the first NAN device and the NAN device according to the second parameter group information and the first parameter group information;

Optionally, in the embodiment of the present invention, the transceiver 803 is configured to send the second message to the first NAN device, specifically:

In the embodiment of the present invention, if the first NAN device wants to measure the distance between the second NAN device and the second NAN device, the first NAN device may carry the ranging trigger information in the first message, so that the first message may be in the DW. Transmitting, and if the second NAN device supports ranging, the second NAN device sends the second parameter group information to the first NAN device in the first time window, so that the first NAN device can obtain the first NAN. The distance between the device and the second NAN device, or the first NAN device may also send the obtained first parameter group information to the second NAN device, so that the second NAN device obtains the first NAN device and the second NAN device. The distance between them. For example, the first time window is a service window, that is, in the embodiment of the present invention, the ranging trigger can be performed in the DW without waiting for the DW to complete the measurement trigger with a message, thereby saving the time required for the ranging. , improve the efficiency of ranging.

It will be clearly understood by those skilled in the art that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations 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, and may be in an electrical, mechanical or other form.

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 purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application 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.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, and a read-only memory. A medium that can store program code, such as a ROM (Read-Only Memory), a random access memory (RAM), a magnetic disk, or an optical disk.

The above embodiments are only used to describe the technical solutions of the present application in detail, but the description of the above embodiments is only for helping to understand the method and the core idea of the present invention, and should not be construed as limiting the present invention. Those skilled in the art will be able to devise variations or alternatives within the scope of the present invention within the scope of the present invention.

Claims

A method for measuring distance between neighboring sensing network NAN devices, comprising:

The first NAN device sends a first message in the discovery window DW, where the first message carries ranging trigger information for triggering the second NAN device to perform ranging, and information of the first time window; the discovery The window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging;

Receiving, by the first NAN device, the second message sent by the second NAN device, obtaining a first time to receive the second message, and determining a ranging capability of the second NAN device according to the second message, The second message is a response message for the first message;

The first NAN device sends a third message to the second NAN device, obtains a second time to send the third message, and obtains first parameter group information according to the first time and the second time; The first parameter group information is used to obtain a distance between the first NAN device and the second NAN device, where the third message is an acknowledgement message for the second message;

Receiving, by the first NAN device, the second parameter group information sent by the second NAN device in the first time window, where the first NAN device is configured according to the first parameter group information and the second parameter Group information, obtaining a distance between the first NAN device and the second NAN device; and/or, the first NAN device transmitting the first to the second NAN device in a first time window a parameter group information, so that the second NAN device obtains a distance between the first NAN device and the second NAN device according to the first parameter group information and the second parameter group information;

The second parameter group information is: the second time when the second NAN device obtains the second message, and obtains a fourth time to receive the third message, according to the third moment and the The parameter group information obtained at the fourth time, the second parameter group information is used to obtain a distance between the first NAN device and the second NAN device.
The method according to claim 2, wherein the first message is a service discovery frame SDF message in the NAN, and the first message carries the first NAN device subscription or Cloth service information.
The method of claim 1 or 2, wherein the receiving, by the first NAN device, the second message sent by the second NAN device comprises:

The first NAN device receives the second message in the discovery window or the first time window.
The method according to any one of claims 1-3, wherein the ranging trigger information includes ranging principle indication information, ranging protocol indication information, ranging request indication information, ranging demand indication information, and measurement. One or any of the opening indication information; wherein

The ranging principle indication information is used to indicate a measurement principle on which the distance measurement is performed;

The ranging protocol indication information is used to indicate a measurement protocol on which the distance measurement is performed;

The ranging requirement indication information is used to indicate a requirement for a parameter that needs to be met for the measured distance;

The ranging requirement indication information is used to indicate a requirement for a distance of a NAN device that satisfies the service information;

The ranging open indication information is used to instruct the second NAN device to enable the ranging function.
A method for measuring distance between neighboring sensing network NAN devices, comprising:

The second NAN device receives the first message sent by the first NAN device in the discovery window DW, where the first message carries the ranging trigger information for triggering the second NAN device to perform ranging, and the first time window. The information window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging;

The second NAN device sends a second message to the first NAN device to obtain a third time to send the second message, where the second message is used to indicate the ranging capability of the second NAN device. The second message is a response message for the first message;

Receiving, by the second NAN device, the third message sent by the first NAN device, obtaining a fourth time to receive the third message, and obtaining a second parameter according to the third time and the fourth time Group information; the second parameter group information is used to obtain a distance between the first NAN device and the second NAN device, and the third message is an acknowledgement message for the second message;

Receiving, by the second NAN device, the first parameter group information sent by the first NAN device in the first time window, where the second NAN device is configured according to the first parameter group information and the second parameter group information Obtaining a distance between the first NAN device and the second NAN device; and/or, the second NAN device transmitting the second parameter to the first NAN device in a first time window Group information, so that the first NAN device obtains a distance between the first NAN device and the second NAN device according to the second parameter group information and the first parameter group information;

The first parameter group information is: the first time that the first NAN device obtains the second message, and the second time that the third message is sent, according to the first time and the The parameter group information obtained at the second moment is used to obtain a distance between the first NAN device and the second NAN device.
The method according to claim 5, wherein the first message is a service discovery frame SDF message in the NAN, and the first message carries service information subscribed or published by the first NAN device.
The method of claim 5 or 6, wherein the sending, by the second NAN device, the second message to the first NAN device comprises:

The second NAN device sends the second message to the first NAN device in the discovery window or the first time window.
The method according to any one of claims 5-7, wherein the ranging trigger information includes ranging principle indication information, ranging protocol indication information, ranging request indication information, ranging demand indication information, and measurement. One or any of the opening indication information; wherein

The ranging principle indication information is used to indicate a measurement principle on which the distance measurement is performed;

The ranging protocol indication information is used to indicate a measurement protocol on which the distance measurement is performed;

The ranging requirement indication information is used to indicate a requirement for a parameter that needs to be met for the measured distance;

The ranging demand indication information is used to indicate a distance to a NAN device that satisfies the service information Departure demand;

The ranging open indication information is used to instruct the second NAN device to enable the ranging function.
A proximity sensing network NAN device, comprising:

a sending module, configured to send a first message in the discovery window DW, where the first message carries ranging trigger information for triggering the second NAN device to perform ranging, and information of the first time window; The discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging;

a determining module, configured to receive a second message sent by the second NAN device, obtain a first time to receive the second message, and determine a ranging capability of the second NAN device according to the second message, where The second message is a response message for the first message;

The sending module is further configured to send a third message to the second NAN device, obtain a second time to send the third message, and obtain first parameter group information according to the first time and the second time The first parameter group information is used to obtain a distance between the NAN device and the second NAN device, and the third message is an acknowledgement message for the second message;

The determining module is further configured to receive the second parameter group information sent by the second NAN device in the first time window, and obtain the second parameter group information according to the first parameter group information and the second parameter group information. a distance between the NAN device and the second NAN device; and/or the sending module is further configured to send the first parameter group information to the second NAN device in a first time window The second NAN device obtains a distance between the NAN device and the second NAN device according to the first parameter group information and the second parameter group information;

The second parameter group information is: the second time when the second NAN device obtains the second message, and obtains a fourth time to receive the third message, according to the third moment and the The parameter group information obtained at the fourth time is used, and the second parameter group information is used to obtain a distance between the NAN device and the second NAN device.
The NAN device according to claim 9, wherein the first message is a service discovery frame SDF message in the NAN, and the first message carries the first NAN device subscription. Or published service information.
The NAN device according to claim 9 or 10, wherein the determining module is configured to receive the second message sent by the second NAN device, specifically:

Receiving the second message in the discovery window or the first time window.
The NAN device according to any one of claims 9-11, wherein the ranging trigger information includes ranging principle indication information, ranging protocol indication information, ranging request indication information, ranging demand indication information, and One or any of a range opening indication information; wherein

The ranging principle indication information is used to indicate a measurement principle on which the distance measurement is performed;

The ranging protocol indication information is used to indicate a measurement protocol on which the distance measurement is performed;

The ranging requirement indication information is used to indicate a requirement for a parameter that needs to be met for the measured distance;

The ranging requirement indication information is used to indicate a requirement for a distance of a NAN device that satisfies the service information;

The ranging open indication information is used to instruct the second NAN device to enable the ranging function.
A proximity sensing network NAN device, comprising:

a receiving module, configured to receive, in a discovery window DW, a first message sent by the first NAN device, where the first message carries ranging trigger information for triggering the NAN device to perform ranging, and a first time window. Information: the discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging;

An acquiring module, configured to send a second message to the first NAN device, to obtain a third moment to send the second message, where the second message is used to indicate a ranging capability of the NAN device, and the second The message is a response message for the first message;

The receiving module is further configured to receive a third message sent by the first NAN device, obtain a fourth time to receive the third message, and obtain a second parameter group according to the third time and the fourth time The second parameter group information is used to obtain a distance between the first NAN device and the NAN device, where the third message is an acknowledgement message for the second message;

The receiving module is further configured to receive the first parameter group information sent by the first NAN device in a first time window, and obtain the foregoing according to the first parameter group information and the second parameter group information. a distance between the first NAN device and the NAN device; and/or the acquiring module is further configured to send the second parameter group information to the first NAN device in a first time window, so that Obtaining, by the first NAN device, a distance between the first NAN device and the NAN device according to the second parameter group information and the first parameter group information;

The first parameter group information is: the first time that the first NAN device obtains the second message, and the second time that the third message is sent, according to the first time and the The parameter group information obtained at the second moment is used to obtain a distance between the first NAN device and the NAN device.
The NAN device according to claim 13, wherein the first message is a service discovery frame SDF message in the NAN, and the first message carries service information subscribed or published by the first NAN device.
The NAN device according to claim 13 or 14, wherein the obtaining module is configured to send a second message to the first NAN device, specifically:

Transmitting the second message to the first NAN device in the discovery window or the first time window.
The NAN device according to any one of claims 13-15, wherein the ranging trigger information includes ranging principle indication information, ranging protocol indication information, ranging request indication information, ranging demand indication information, and One or any of a range opening indication information; wherein

The ranging principle indication information is used to indicate a measurement principle on which the distance measurement is performed;

The ranging protocol indication information is used to indicate a measurement protocol on which the distance measurement is performed;

The ranging requirement indication information is used to indicate a requirement for a parameter that needs to be met for the measured distance;

The ranging requirement indication information is used to indicate a requirement for a distance of a NAN device that satisfies the service information;

The ranging open indication information is used to instruct the second NAN device to enable the ranging function.
A proximity aware network NAN device, comprising: a memory, a processor and a transceiver connected to the same bus;

The memory is configured to store an instruction;

The transceiver is configured to send a first message in the discovery window DW, where the first message carries ranging trigger information for triggering the second NAN device to perform ranging, and information of the first time window; The discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, the first time window is a time window for performing ranging, and receiving the a second message sent by the second NAN device;

The processor is configured to execute the instruction, obtain a first time to receive the second message, and determine a ranging capability of the second NAN device according to the second message, where the second message is a response message of the first message;

The transceiver is further configured to send a third message to the second NAN device;

The processor is further configured to obtain a second time when the third message is sent, and obtain first parameter group information according to the first time and the second time; the first parameter group information is used to obtain a Defining a distance between the NAN device and the second NAN device, where the third message is an acknowledgement message for the second message;

The transceiver is further configured to receive the second parameter group information that is sent by the second NAN device in the first time window, where the processor is further configured to use the first parameter group information and the The second parameter group information is obtained, obtaining a distance between the NAN device and the second NAN device; and/or the transceiver is further configured to, in the first time window, to the second NAN device Transmitting the first parameter group information, so that the second NAN device obtains a distance between the NAN device and the second NAN device according to the first parameter group information and the second parameter group information;

The second parameter group information is: the second time when the second NAN device obtains the second message, and obtains a fourth time to receive the third message, according to the third moment and the The parameter group information obtained at the fourth time is used, and the second parameter group information is used to obtain a distance between the NAN device and the second NAN device.
The NAN device according to claim 17, wherein said first message is NAN The service discovery frame SDF message carries the service information subscribed or issued by the first NAN device.
The NAN device according to claim 17 or 18, wherein the transceiver is configured to receive the second message sent by the second NAN device, specifically:

Receiving the second message in the discovery window or the first time window.
The NAN device according to any one of claims 17 to 19, wherein the ranging trigger information includes ranging principle indication information, ranging protocol indication information, ranging request indication information, ranging demand indication information, and One or any of a range opening indication information; wherein

The ranging principle indication information is used to indicate a measurement principle on which the distance measurement is performed;

The ranging protocol indication information is used to indicate a measurement protocol on which the distance measurement is performed;

The ranging requirement indication information is used to indicate a requirement for a parameter that needs to be met for the measured distance;

The ranging requirement indication information is used to indicate a requirement for a distance of a NAN device that satisfies the service information;

The ranging open indication information is used to instruct the second NAN device to enable the ranging function.
A proximity aware network NAN device, comprising: a memory, a processor and a transceiver connected to the same bus;

The memory is configured to store an instruction;

The transceiver is configured to receive, in a discovery window DW, a first message sent by a first NAN device, where the first message carries a ranging trigger information for triggering the NAN device to perform ranging, and a first time Information of the window; the discovery window is a time window for performing service discovery in the NAN, the first message is a message for performing service discovery, and the first time window is a time window for performing ranging; And sending a second message to the first NAN device;

The processor is configured to execute the instruction, obtain a third moment to send the second message, where the second message is used to indicate ranging capability of the NAN device, and the second message is for the a response message of the first message;

The transceiver is further configured to receive a third message sent by the first NAN device;

The processor is further configured to obtain a fourth time to receive the third message, obtain second parameter group information according to the third time and the fourth time; the second parameter group information is used to obtain the Defining a distance between the first NAN device and the NAN device, where the third message is an acknowledgement message for the second message;

The transceiver is further configured to receive the first parameter group information sent by the first NAN device in a first time window, where the processor is further configured to use, according to the first parameter group information, the The second parameter group information is obtained, and the distance between the first NAN device and the NAN device is obtained; and/or the transceiver is further configured to send the first NAN device to the first NAN device in a first time window. The second parameter group information is obtained, so that the first NAN device obtains a distance between the first NAN device and the NAN device according to the second parameter group information and the first parameter group information;

The first parameter group information is: the first time that the first NAN device obtains the second message, and the second time that the third message is sent, according to the first time and the The parameter group information obtained at the second moment is used to obtain a distance between the first NAN device and the NAN device.
The NAN device of claim 21, wherein the first message is a service discovery frame SDF message in the NAN, and the first message carries service information subscribed or published by the first NAN device.
The NAN device according to claim 21 or 22, wherein the transceiver is configured to send a second message to the first NAN device, specifically:

Transmitting the second message to the first NAN device in the discovery window or the first time window.
The NAN device according to any one of claims 21 to 24, wherein the ranging trigger information includes ranging principle indication information, ranging protocol indication information, ranging request indication information, ranging demand indication information, and One or any of a range opening indication information; wherein

The ranging principle indication information is used to indicate a measurement principle on which the distance measurement is performed;

The ranging protocol indication information is used to indicate a measurement protocol on which the distance measurement is performed;

The ranging requirement indication information is used to indicate a requirement of a parameter that needs to be satisfied for the measured distance begging;

The ranging requirement indication information is used to indicate a requirement for a distance of a NAN device that satisfies the service information;

The ranging open indication information is used to instruct the second NAN device to enable the ranging function.