KR20180035084A - Location information reporting methods and device - Google Patents

Abstract

A wireless communication system is disclosed. Specifically, a method of operating a NAN (Neighbor Awareness Networking) terminal and a NAN terminal is disclosed.

Description

[0001] The present invention relates to a method and an apparatus for acquiring location information,

The following description relates to a wireless communication system, and more particularly, to a method for acquiring location information of a NAN (Neighbor Awareness Networking) terminal.

In telecommunication systems, a communication network is used to exchange messages between spatially separated devices. The network may be classified according to geographical ranges such as an urban area, a local area, or a personal area. The network may be designated as a wide area network (WAN), an area area network (MAN), a LAN (LAN), a WLAN (WLAN), or a personal area network (PAN), respectively. In addition, the network may include a variety of network nodes and devices (e.g., circuit switched to packet switched), the type of physical medium used for transmission (e.g., wireline to wireless) , Internet Protocol Suite, SONET (Synchronous Optical Networking), Ethernet, etc.). If the network element is mobile or the network structure is formed as an ad-hoc topology rather than a fixed network, it may be desirable to use a wireless network. This is because wireless networks are easy for user movement and high-speed field deployment.

As the spread of mobile devices has widened in recent years, a wireless LAN (Wireless LAN) among the wireless networks capable of providing fast wireless Internet services to mobile devices is attracting attention. However, as the number of mobile devices increases and the amount of data transmitted by mobile devices increases, wireless LAN technology more efficient than existing wireless LAN technology is required.

The present invention relates to an efficient operation of a wireless communication system, and more particularly, to a method for acquiring location information of a NAN terminal in a wireless communication system.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an embodiment of the present invention, an apparatus, system, and method of operating a NAN terminal for a NAN terminal can be provided.

The present invention provides an efficient wireless communication system. Specifically, the present invention can provide an operation method of a NAN terminal and a NAN terminal that operate efficiently.

The effects obtained by the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description .

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention, illustrate various embodiments of the invention and, together with the description, serve to explain the principles of the invention.
1 is a diagram illustrating a wireless LAN system according to an embodiment of the present invention;
2 is a diagram illustrating a wireless LAN system according to another embodiment of the present invention.
Figures 3 through 4 illustrate NAN clusters according to an embodiment of the present invention.
5 is a diagram illustrating a structure of a NAN terminal according to an embodiment of the present invention.
Figures 6-7 illustrate the relationship of NAN components in accordance with an embodiment of the present invention.
8 is a diagram illustrating a state transition of a NAN terminal according to an embodiment of the present invention;
9 is a block diagram illustrating a configuration of a wireless device according to an embodiment of the present invention.
10 is a diagram illustrating distance measurement between NAN terminals according to an embodiment of the present invention;
11 is a flowchart of an FTM protocol used for distance measurement between NAN terminals according to an embodiment of the present invention
12 is a flow chart of a NAN ranging session setup according to an embodiment of the present invention initiated by a specific NAN service
FIG. 13 is a flowchart illustrating a procedure for setting up a NAN ranging session according to an embodiment of the present invention, which is one of service discovery processes,

As used herein, terms used in the present invention are selected from general terms that are widely used in the present invention while taking into account the functions of the present invention. However, these terms may vary depending on the intention of a person skilled in the art, custom or the emergence of new technology. Also, in certain cases, there may be a term arbitrarily selected by the applicant, and in this case, the meaning thereof will be described in the description of the corresponding invention. Therefore, it is intended that the terminology used herein should be interpreted relative to the actual meaning of the term, rather than the nomenclature, and its content throughout the specification.

Throughout the specification, when a configuration is referred to as being "connected" to another configuration, it is not limited to the case where it is "directly connected," but also includes "electrically connected" do. Also, when an element is referred to as " including " a specific element, it is meant to include other elements, rather than excluding other elements, unless the context clearly dictates otherwise. In addition, the limitations of " above " or " below ", respectively, based on a specific threshold value may be appropriately replaced with "

Embodiments of the present invention may be supported by standard documents disclosed in at least one of IEEE 802 systems, 3GPP, 3GPP LTE and LTE-Advanced (LTE-Advanced) systems, and 3GPP2, standards related to wireless communications. Specifically, steps or configurations not described in the embodiments of the present invention for clarifying the technical idea of the present invention can be supported by the document. In addition, all terms disclosed in this document may be described by the standard document.

The embodiments described in the present invention can be used with various communication technologies. In particular, embodiments of the present invention may be implemented in a wireless communication system such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access), and the like. At this time, the CDMA can be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. The TDMA may be implemented in a wireless technology such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA). For clarity, the following description will focus on the IEEE 802.11 system, but the technical idea of the present invention is not limited thereto.

1 illustrates a wireless LAN system according to an embodiment of the present invention. A WLAN system includes one or more Basic Service Sets (BSSs), which represent a collection of devices that can successfully communicate and communicate with one another. In general, a BSS can be divided into an infrastructure BSS (infrastructure BSS) and an independent BSS (IBSS). FIG. 1 shows the infrastructure BSS.

1, an infrastructure BSS (BSS1, BSS2) includes one or more stations (STA-1, STA-2, STA-3, STA-4, STA-5) and a distribution service A distribution system (DS) for connecting access points (PCP / AP-1, PCP / AP-2) and a plurality of access points (PCP / AP-1 and PCP / AP- .

A station (STA) is an arbitrary device including a medium access control (MAC) conforming to the IEEE 802.11 standard and a physical layer interface for a wireless medium, and is broadly referred to as a non-access point Non-AP) station as well as an access point (AP). In this specification, the term " terminal " may be used as a concept including both a station and a wireless LAN communication device such as an AP. The station for wireless communication includes a processor and a transceiver, and may further include a user interface unit, a display unit, and the like according to an embodiment. The processor may perform various processes for generating frames to be transmitted over the wireless network, processing frames received through the wireless network, and controlling other stations. The transceiver is functionally connected to the processor and transmits and receives frames over the wireless network for the station.

An access point (AP) is an entity that provides a connection to a distribution system (DS) via a wireless medium for its associated station. In the infrastructure BSS, communication between non-AP stations is performed via an AP. However, when a direct link is established, direct communication is possible between non-AP stations. In the present invention, the AP is used as a concept including a PCP (Personal BSS Coordination Point), and broadly includes a central controller, a base station (BS), a node-B, a base transceiver system (BTS) Controller, and the like.

A plurality of infrastructure BSSs may be interconnected via a distribution system (DS). At this time, a plurality of BSSs connected through a distribution system is called an extended service set (ESS).

2 illustrates an independent BSS that is a wireless LAN system according to another embodiment of the present invention. In the embodiment of FIG. 2, the same or corresponding parts as those of the embodiment of FIG. 1 are not described.

Since the BSS-3 shown in FIG. 2 is an independent BSS and does not include an AP, all the stations STA-6 and STA-7 are not connected to the AP. An independent BSS is not allowed to connect to the distribution system and forms a self-contained network. In the independent BSS, each of the stations STA-6 and STA-7 can be directly connected to each other.

As such, the stations may be configured to communicate in various manners to coordinate transmission and reception of messages to prevent interference and achieve various tasks. In a specific embodiment, the network of Fig. 2 may be configured as "Neighbor Awareness Networking" (NAN), such as a social-Wi-Fi network. Specifically, a Social-Wi-Fi network may be referred to as a network for communication between nearby stations. STAs operating in a social-Wi-Fi network may belong to different network architectures (e.g., different assumptions or stations of buildings as part of independent LANs with different external network connections)

The operation of the STA operating in the wireless LAN system can be described in terms of the layer structure. In terms of device configuration, the hierarchy can be implemented by a processor. The STA may have a plurality of hierarchical structures. For example, the hierarchical structure covered in the 802.11 standard document is mainly a MAC sublayer and a physical (PHY) layer on a DLL (Data Link Layer). The PHY may include a Physical Layer Convergence Procedure (PLCP) entity, a PMD (Physical Medium Dependent) entity, and the like. The MAC sublayer and the PHY conceptually include management entities called a MAC sublayer management entity (MLME) and a physical layer management entity (PLME), respectively. These entities provide a layer management service interface in which a layer management function operates .

3 to 4 show a NAN cluster according to an embodiment of the present invention.

The NAN network may consist of NAN terminals that use the same set of NAN parameters (e.g., a time interval between consecutive discovery windows, a duration of a discovery window, a beacon interval, or a NAN channel, etc.). NAN terminals can form a NAN cluster. In this case, the NAN cluster means a set of NAN terminals that use the same set of NAN parameters and are synchronized with the same discovery window schedule. The NAN terminal in the NAN cluster can directly transmit the multicast / unicast NAN service discovery frame to another NAN terminal within the scope of the discovery window.

5 illustrates a structure of a NAN terminal according to an embodiment of the present invention. As shown in FIG. 4, the NAN terminal can operate based on the physical layer of 802.11. In addition, the NAN terminal can include NAN APIs as a main component to a NAN Discovery Engine, a NAN MAC (Medium Access Control), and applications (Application 1, Application 2, ..., Application N).

Figures 6-7 illustrate the relationship of NAN components in accordance with an embodiment of the present invention. The NAN Discovery Engine handles service requests and responses. The NAN MAC handles NAN beacon frames and NAN service discovery frames.

FIG. 8 shows a state transition of the NAN terminal according to an embodiment of the present invention. The NAN terminal may perform a master role. Also, the role of the NAN terminal can be changed. Specifically, the NAN terminal can perform various roles and states, and FIG. 7 shows an example thereof. The role and state that the NAN terminal can have are a master role and a master non-master sync, a non-master non-master non- Sync). Depending on the role and state, the transmission availability of the discovery beacon frame and / or the synchronous beacon frame may be determined. Specifically, the transmission availability of the discovery beacon frame and / or the synchronous beacon frame may be as illustrated in Table 1 below.

[Table 1]

NAN terminals participating in the same NAN cluster can be synchronized to a common clock. The TSF of the NAN cluster can be implemented by a distributed algorithm that must be performed in all NAN terminals. Each NAN terminal participating in the NAN cluster can transmit NAN Sync Beacon frames according to the above algorithm. The device can synchronize its clock during the Discovery Window (DW). The length of the DW is 16 TUs. During the DW, one or more NAN terminals may transmit Synchronization Beacon frames to help all NAN terminals in the NAN cluster synchronize their clocks. As noted above, the NAN terminal may be a non- - Transition between states such as sink, non-master sync, master state, etc. The state transition can be performed according to the result of the comparison of the RSSI, AMR, hop counter, etc. of the synchronous beacon frame.

9 is a block diagram illustrating a configuration of a wireless device according to an embodiment of the present invention. A wireless device 100 according to an embodiment of the present invention may include a processor 110, a transceiver 120, a user interface 140, a display unit 150, and a memory 160.

First, the transceiver unit 120 transmits and receives a wireless signal such as a WLAN physical layer frame, and may be embedded in the wireless device 100 or externally. According to the embodiment, the transceiver 120 may include at least one transceiver module using different frequency bands. For example, the transceiver 120 may include transmit and receive modules of different frequency bands such as 2.4 GHz, 5 GHz, and 60 GHz. According to one embodiment, the station 100 may include a transmission / reception module using a frequency band of 6 GHz or more and a transmission / reception module using a frequency band of 6 GHz or less. Each of the transmission / reception modules can perform communication with another wireless device according to a wireless LAN standard of a frequency band supported by the transmission / reception module. The transceiver unit 120 may operate only one transceiver module at a time or may operate a plurality of transceiver modules at the same time according to the performance and requirements of the station 100. [ When the station 100 includes a plurality of transmission / reception modules, each of the transmission / reception modules may be provided in an independent form, or a plurality of modules may be integrated into one chip.

The user interface unit 140 includes various types of input / output means provided in the wireless device 100. That is, the user interface unit 140 can receive user input using various input means, and the processor 110 can control the wireless device 100 based on the received user input. Also, the user interface unit 140 may perform output based on the instruction of the processor 110 using various output means.

The display unit 150 outputs an image on the display screen. The display unit 150 may output various display objects such as a content executed by the processor 110 or a user interface based on a control command of the processor 110. [

The memory 160 also stores a control program used in the wireless device 100 and various types of data. Such a control program may include an access program required for the wireless device 100 to make a connection with another wireless device.

The processor 110 may execute various instructions or programs and may process data within the wireless device 100. In addition, the processor 110 controls each unit of the wireless device 100 described above, and can control data transmission / reception between the units. According to an embodiment of the present invention, the processor 110 may execute a program for accessing another wireless device stored in the memory 160, and may receive a communication setup message transmitted by another wireless device. Specifically, the processor 110 may be configured to perform one or more operations of an application, a service, an ASP layer according to various embodiments of the present invention described above. In addition, processor 110 may be configured to perform operations related to devices operating as APs / stations. The processor 110 also reads the information on the preference condition of the wireless device 100 included in the communication setup message and requests the connection to the other wireless device based on the information on the preference condition of the wireless device 100 . The processor 110 of the present invention may refer to a main control unit of the wireless device 100 and may be configured to control some components of the wireless device 100 such as the control unit for individually controlling the transceiver 120, You can also point to a unit. That is, the processor 110 may be a modulator and / or a demodulator for modulating a radio signal transmitted / received from the transceiver 120. The processor 110 controls various operations of wireless signal transmission and reception of the wireless device 100 according to the embodiment of the present invention. Specific embodiments thereof will be described later.

The wireless device 100 shown in FIG. 9 is a block diagram according to an embodiment of the present invention, in which the blocks that are separately displayed are logically distinguished from the elements of the device. Thus, the elements of the device described above can be mounted as one chip or as a plurality of chips depending on the design of the device. For example, the processor 110 and the transceiver 120 may be integrated into one chip or may be implemented as a separate chip. In some embodiments of the present invention, some components of the station 100, such as the user interface 140 and the display unit 150, may be optionally provided in the station 100.

Hereinafter, a method of transmitting and receiving signals of a NAN apparatus according to various embodiments of the present invention will be described with reference to the above description.

Description of invention

10 shows a ranging operation of a NAN terminal participating in a NAN cluster. NAN Ranging Functionality supports distance information between two NAN terminals to be obtained by using simplified FTM (Fine Timing Measurement: ref. IEEE 802.11REVmc_D8.0) method.

FIG. 11 is an example of the FTM protocol supported for NAN ranging functionality. Among the FTM methods of IEEE802.11, the case of Single Burst and ASAP mode is used.

In order to perform NAN ranging, the following processes are required.

1. NAN Ranging capability exchange

2. NAN Ranging session setup, update, and termination

3. NAN Ranging report

4. FTM Protocol and Procedure

For the first NAN ranging capability exchange, a Ranging Info attribute and one or a plurality of NAN Availability attributes should be included in a service discovery frame for performing NAN publication / subscription. Ranging Information Attribute is as follows.

Ranging Information Attribute

The Ranging Info attribute is used for a NAN Ranging device to indicate its Ranging Information. The Ranging Info attribute can be included in the Service Discovery frame, the Ranging Request frame and the Ranging Response frame. The format of the Ranging Info attribute is defined in Table 10-75.

Table 10-75: Ranging Information Attribute Format

The Ranging Information Attribute may be included in the service discovery frame to notify the same NAN cluster terminals that it has a ranging capability. In addition, the attribute defines the Location Info Availability field. This function informs the NAN Ranging device about its availability. It is possible to display the availability of the location information according to the supportable configuration information of the corresponding field. The terminal receiving the information can request the other terminal for the supportable location information and acquire the corresponding information. However, in the related art, only the FTM request frame can be used to request a NAN ranging device. There is no detailed method, and using the FTM request frame means that the FTM initiator requests and acquires only the corresponding location information to the FTM responder, and there is no way for the FTM responder to request and obtain the location information of the FTM initiator. Accordingly, in the present invention, a method of acquiring Location Information at the time of NAN Ranging and an interface between the NAN Ranging Engine / NAN Engine / NAN Discovery Engine and the service / application are defined.

NAN Ranging Session setup can be started in two ways. The first may be initiated from one of the NAN services. The second can be started as part of the process of service discovery.

The first method based on FIG. 12 will be described first. A terminal supporting NAN Ranging performs a service discovery process including a Ranging Info and NAN Availability attribute in a service discovery frame, and the service / application performs a Range_Request () method to perform ranging with the target terminal based on the acquired information When the call is made, the Ranging request frame is transmitted to the target terminal. The target terminal receives the frame, accepts the ranging request if several pre-conditions are satisfied, and responds by using a ranging response frame. The FTM protocol is performed in the negotiated resource section. If Ranging Report Required bit of Ranging Setup Attribute included in Ranging Response Frame is set to 1, Ranging Responder shall be informed of the result by using Ranging Report Frame. The NAN terminal transmitting the ranging request frame is called an FTM initiator, and the NAN terminal receiving and responding to the frame is called an FTM responder. In order to solve the technical problem of the present invention, a method for requesting the information indicated in the Location Information availability field in the Ranging Request Frame is needed.

First, the information for requesting the above information is required in the Range_request () method. For example, LCI Local Coordinate, Geospatial LCI WGS84, and Civic Location defined in the Location Information availability field can be added. The FTM initiator flags only the necessary information based on the Location Information availability of the FTM responder, and transmits the flag to the FTM responder in the Ranging Request Frame. At this time, the information may be included in a ranging setup attribute.

Example 1 Method: Range_Request (MAC_Address, range_id, configuration_parameters): Add location_info_paramters to the conventionally defined Range_request () method and place the flag underneath. Information on the target terminal can be requested by the sub-configuration information of this parameter. It may be added as a new parameter to a conventional method or as a subset of a parameter defined in a conventional method. The added information can be included in the Ranging Setup Attribute.

● location_info_parameters:

  ■ LCI Local Coordinate flag

    ◆ Set to 1 indicating LCI Local Coordinate Info is required. Otherwise, set to 0

  ■ Geospatial LCI WGS84 flag

    ◆ Set to 1 indicating Geospatial LCI WGS84 Info is required. Otherwise, set to 0

  ■ Civic Location flag

    ◆ Set to 1 indicating Civic Location Info is required. Otherwise, set to 0

When the FTM responder satisfies the condition for the Ranging and sends the response, it sends the requested location information to the Ranging Response Frame. The frame includes position information corresponding to the combination of the LCI report attribute (Location configuration information report) of the embodiment 3-1, the Location Civic report attribute of the embodiment 3-2, and the Geospatial LCI WGS84 report attribute of the embodiment 3-3 .

The NAN Engine / NAN Ranging Engine / NAN Discovery Engine of the terminal receiving the Ranging Response Frame informs the service / application of the corresponding information. Use the Range_Result () event or let us know the event separately for location information transfer.

Example 1-1: The parameters including LCI Local Coordinate, Geospatial LCI WGS84, and Civic Location are defined in Event: Range_Result (MAC_Address, range_id, range_measurement, event_type) Service / application.

Embodiment 1-2: A new event is generated in the form of Event: Location_Info_Result (MAC_Address, ,,, Location_Info_parameters), and the Ranging Response Frame is operated in the same manner as in Embodiment 1-1.

Embodiment 1-3: When the Range_result () event is called after performing the FTM protocol without raising the location information immediately after receiving the ranging response frame as shown in FIG. 12, the distance information and the position information are increased .

The FTM responder also adds the corresponding flag to the Range_Response () method to request the location information of the FTM initiator so that information can be constructed and transmitted in the ranging response frame.

Example 2-Method: Range_Response (response_control_parameters, matching_filter_for_response, range_id, configuration_parameters) - In the same manner as the first embodiment, information can be configured and used in the same functional sense. To request the corresponding information. The added information can be included in the Ranging Setup Attribute.

The FTM initiator transmits the requested information to the FTM responder using a Ranging Report frame or a separate frame for the location information component requested in the frame. The FTM Responder that receives this information informs the service / application through the event. At this time, the Range_result () event is used to inform the user in the same manner as the embodiment 1-1. Alternatively, a method similar to the embodiment 1-2 in which an event for only location information is formed and notified is also possible. This is applicable to cases in which the Ranging distance information is not requested and the FTM initiator only receives the location information. Alternatively, the event method can be applied by a separate designation. Based on the Ranging Report Required bit, the LCI Local Coordinate flag, the Geospatial LCI WGS84 flag, and the Civic Location flag included in the Ranging setup frame of the Ranging response frame, the FTM responder determines whether or not the Ranging Report Frame is transmitted, In case of transmission, the requested contents are transmitted according to the configuration of the requested information. When requesting location information, please include NAN Ranging result regardless of whether Ranging Report Required bit is set or not. Preferably, a ranging report value and location information are included in a conventionally defined Ranging Report Frame and transmitted to an FTM responder. Or if it wants to receive location information from the FTM initiator, it sets the Ranging report required bit to true and requests it through Ranging report frame. Always set the Ranging report required bit to true to always receive location information. At this time, the requested individual position information and the ranging result information can also be acquired.

The Raging report frame includes the following previously defined FTM Range Report attributes and the new LCI report Attribute, Location Civic report, etc. May be included.

Fine Timing Measurement (FTM) Range Report Attribute

The FTM Range Report attribute is used for the Initiator to transmit FTM Range Report to the Responder. The FTM Range Report attribute is included in the Ranging Report frame.

Table 10-78: FTM Range Report Attribute

In addition, the reporting format configuration for location information conforms to the frame format: Draft IEEE802.11REVmc.D8.0 §9.4.2.22.10 LCI report (Location configuration information report), §9.4.2.22.13 Location civic report, etc Or some modification is applicable. For example, you can configure it as different.

Example 3-1: LCI report attribute (Location configuration information report)

The LCI Report attribute is used for the Initiator to transmit LCI Report to the Responder. The LCI Report attribute is included in the Ranging Report frame

Table xx: LCI Report Attribute

Example 3-2: Location Civic report attribute

The Location Civic Report attribute is used for the Initiator to transmit Location Civic Report to the Responder. The Location Civic Report attribute is included in the Ranging Report frame

Table xx: Location Civic Report Attribute

Example 3-3: Geospatial LCI WGS84 report attribute

The Geospatial LCI WGS84 Report attribute is used for the initiator to transmit Geospatial LCI WGS84 Report to the Responder. The Geospatial LCI WGS84 attribute is included in the Ranging Report frame

Table xx: Geospatial LCI WGS84 Report Attribute

Hereinafter, a method for configuring the second Ranging session setup based on FIG. 13 will be described. solicited publishing service Discovery-based, subscriber initiated in the order that the FTM protocol is requested to start. The publisher receiving the subscription (including Ranging Info and NAN Availability attribute) responds with a solicited Publish SDF (Ranging Required bit is true). The subscriber sends a Ranging Request Frame (Ranging Info Attribute, Ranging Setup Attribute, and NAN Availability attribute) to the publisher, and the corresponding UE receives the Ranging Response Frame (same attribute as the request frame, but details are different) do. A similar concept described in the first Ranging Session setup based on FIG. 12 is applied. Subscribe and solicited Location information Availability field of the Ranging Info attribute included in the solicited publish after the publishing process Information about the selection of all information that the subscriber (FTM initiator) can support, or one or more combinations of the information, Engine / NAN Ranging Engine / NAN Service Discovery Engine can decide internally or can be configured by receiving as input value of Subscribe or Publish method. The FTM Responder (Publisher) receiving this information includes the requested location information when transmitting the ranging responder frame. Also, the FTM Responder displays information to be requested by the same method and requests it to the FTM initiator by including it in Ranging Response Frame. Inform the FTM responder with the relevant information in the Ranging Report frame. At this time, the FTM responder informs the service / application by adding the location information parameter to the Receive () event, and the FTM initiator adds it to the DiscoveryResult () event. Detailed parameter setting, information request, and information transfer method can be extended and applied as in the above-described method in FIG. Also, as described with reference to FIG. 12, a new position information reporting frame can be constructed and used for transmission, and it is also possible to transmit the frame including the relative distance information. You can include the required information attribute as shown above.

It is possible to add a process of determining whether to perform the FTM protocol to acquire the absolute position information between the two terminals based on the above two methods and then determine the relative position. Therefore, the FTM protocol may not be performed. For example, in FIG. 12, if the FTM initiator supports the location civic method among the location information availability and the relative FTM responder also supports the location civic, the FTM initiator requests the Ranging request frame for the corresponding information and the FTM responder When the corresponding information is obtained in response, the FTM initiator can obtain the distance using its own absolute position information and the absolute position information of the other terminal. Therefore, the distance measurement procedure can be omitted using the FTM protocol. To accomplish this, it is necessary to exchange information for canceling the FTM protocol as a result of distance estimation using an absolute position such as Ranging confirm frame / Ranging report frame / FTM cancel fame, and informing the absolute position of the FTM initiator and the estimated distance information Can be added. If the NAN Engine / NAN Service Discovery Engine / NAN Ranging Engine satisfies the above conditions, it can be transmitted. Ranging confirm frame / Ranging report frame / FTM cancel fame may include information such as FTM initiator's MAC address, FTM responder's MAC address, Status (cancel FTM protocol ,,), location information of FTM initiator, distance, When acquiring the absolute position information of the two terminals and the absolute position information of the other terminal before performing the NAN ranging, the counterpart terminal shares its absolute position information and relative distance information with the intention to cancel the NAN ranging. 13 can also be expanded.

In the above-mentioned invention, a method of acquiring location information of a terminal has been proposed as a part of NAN ranging operation. Next, the proposal is a method of acquiring location information by soliciting and responding. The location information availability field of the Ranging Information Attribute is informed in the service discovery process, and the terminal that obtained the information requests the corresponding information to the other terminal, and the terminal that accepted the information transmits the information to the requesting terminal. For this operation, it defines the interface with the service / application and the NAN Engine / NAN Ranging Engine / NAN Discovery Engine, and the frame for transmitting it and the frame format. The transmission frame may include the information of the embodiments 3-1, 3-2, and 3-3 described above. Location request frame / location response frame / location The report frame method / event consists of the following elements. More detailed information can be added. The resources for transmitting the three frames can be established in a common resource section that is previously negotiated through the NAN availability attribute / Further availability map attribute in the service discovery process.

Example 4-1

Method1: location_request (MAC_address, location_type);

  -MAC_address: MAC address of the partner terminal that wants to know the location information

  -location type: type of request information according to location info availability

Method2: location _response (requestor_MAC_address, ,, status,)

  -requestor_MAC_address: MAC address of the location information requestor

  -status: accept or reject with a reason code

Event 1: location_indication (requestor_MAC_address, location_type, ..);

  Location_confirm (status, responder_MAC_address, requestor_MAC_address, ..);

  location_result (MAC_address, location_info);

  -MAC_address: MAC address of the other terminal

  -location_info: Location information according to type (conforms to predefined information configuration format,

  Information of the above Examples 3-1, 3-2, and 3-3 can be used. )

In addition, if the NAN Ranging session setup is invoked during the service discovery process, the Publish function must be able to manage the Publish function in addition to the publish trigger condition.

solicited publish and the Ranging_required bit in the Service Descriptor Extension Attribute (SDEA) is true, the prerequisite that the subscribe SDF must have a ranging info attribute and / or NAN availability attribute should be additionally specified in the publish trigger condition. At this time, if the subscribe SDF information is not included, the NAN discovery engine judges that the frame filtering is not performed and does not transmit the solicited publish frame to the corresponding subscriber.

While the present invention has been described by taking the wireless LAN communication as an example, the present invention is not limited thereto and can be applied to other communication systems such as cellular communication. Also, while the method, apparatus, and system of the present invention have been described in connection with specific embodiments thereof, some or all of the elements, acts or operations of the present invention may be implemented using a computer system having a general purpose hardware architecture.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. Therefore, the above-described embodiments are to be interpreted in all aspects as illustrative and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

Claims (1)

NAN (Neighbor Awareness Networking) device in a wireless communication system.

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