KR20080041531A - Communication method for wireless network and wireless network system - Google Patents

Abstract

A communication method in a wireless network and a wireless network system are provided to simplify the following presence processes by providing presence capability or location data in a step of preparing or setting a presence, thereby enabling station users to quickly use a presence service at a desired time. One station(12) transmits data including a location descriptor, including geographic coordinates and civic location, through a wireless network. The other station(14) receives the data including the location descriptor through the wireless network. The data including the location descriptor is included in allowed or supported one or more among a beacon or probe request, a probe response, a presence request, a present response, a presence configuration request, a presence configuration response, an association request, an association response, a reassociation request and a reassociation response.

Description

Communication method and wireless network system in wireless network {Communication Method for Wireless Network and Wireless Network System}

1A and 1B are conceptual diagrams of wireless network systems according to embodiments of the present invention.

FIG. 2 is a flowchart illustrating a coupling process for data transmission in the WLAN system of FIG. 1A.

3 is a flowchart of a communication method in a wireless network according to an embodiment of the present invention.

4 is a flowchart of a communication method in a wireless network according to another embodiment of the present invention.

5 through 15 are diagrams illustrating fields included in presence parameters included in the connection or reconnection request frame of FIG. 4.

16 is a flowchart of a communication method in a wireless network according to another embodiment of the present invention.

17 is a flowchart illustrating a communication method of a beacon frame in a wireless network according to another embodiment of the present invention.

18 is a flowchart illustrating a method of communicating probe request and response frames in a wireless network according to another embodiment of the present invention.

19 is a flowchart illustrating a method of communicating a presence preparation request and response frame in a wireless network according to another embodiment of the present invention.

FIG. 20 illustrates the format of the presence preparation request frame of FIG.

FIG. 21 shows the format of the presence preparation response frame of FIG.

22 shows the format of the presence response frame of FIG.

23 is a flowchart of a method for communicating a presence request and response frame in a wireless network according to another embodiment of the present invention.

Fig. 24 shows the format of the presence request frame.

25 is a system configuration diagram of a wireless network explaining the relationship between presence information providers according to another embodiment of the present invention.

* Description of the main parts of the drawings

10: WLAN system

12: station

14: access point

16: distribution system

The present invention relates to a communication method for transmitting and receiving various information or data related to presence service in a wireless network, and a wireless network system thereof.

Recently, as a personal communication tool, a presence service between terminals is rapidly spreading.

The presence information used for this presence service is information indicating the availability of communication. In more detail, the presence information refers to a means for communicating between users who want to use the presence service, a willingness to communicate, an ability and specificity in communication, and the like.

In addition, as the wireless network environment has recently spread rapidly, presence services have been provided in wireless networks.

An object of the present invention is to transmit and receive various information or data related to presence service in a wireless network.

Accordingly, the present invention provides a method for transmitting a data including a location descriptor, including a geographic coordinates and a civic location, by one station to transmit data through a wireless network. And, another station, receiving, over the wireless network, data comprising a location descriptor.

In another aspect, the present invention provides a station for transmitting data via a wireless network including a location descriptor including both geographic coordinates and civic location. Provided is a wireless network system including another station for receiving data including a descriptor over a wireless network.

Hereinafter, with reference to the drawings will be described embodiments of the present invention; Hereinafter, embodiments of the present invention will be described using a wireless LAN system as an example of a wireless network system. However, embodiments of the present invention will be substantially the same in the same or allowable range as the WLAN system in the range allowed or supported in various wireless network systems other than the WLAN system. In addition, the terms or words used in the embodiments of the present invention may be used as other terms or words in various wireless network systems, but the present invention may be used when the actual meaning is the same or similar despite the differences between the terms or words. It is included in the scope of the invention.

Wireless Network System

1A and 1B are conceptual diagrams of wireless network systems according to embodiments of the present invention. Like elements in FIGS. 1A and 1B use the same reference numbers.

Referring to FIG. 1A, a wireless network system, for example, a wireless LAN system 10 may include a plurality of stations or stations 12, an access point or a wireless base station 14, a backbone network or a distribution system ( 16).

The plurality of stations 12 are equipped with a wireless LAN network interface card (Network Interface Card) to perform the operation of the physical layer and MAC layer based on the IEEE 802.11 standard. In the WLAN system 10 shown in FIG. 1A, a plurality of stations 12 are coupled to an access point 14 to transmit data frames.

The access point 14 performs a wired / wireless interworking bridge function of relaying a frame transmitted from one station to another station. This access point 14 performs the same function as a bridge or switch of Ethernet.

In addition, since the access point 14 includes a physical layer and a MAC layer that are basically the same as the station 12 described above, the access point 14 basically performs the same operation as the station 12. Can be. Thus, the access point 14 may be considered the same as the station 14 as needed.

The distribution system 16 is a backbone network connecting several access points 14. The distribution system 16 is generally Ethernet, but can also connect several access points 14 wirelessly. Broadly speaking, the distribution system 16 may include routers or switches connected to Ethernet and servers connected to wired and wireless Internet networks.

Referring to FIG. 1B, a wireless network system, for example, a wireless LAN system 10 includes a plurality of stations or terminals 12. The WLAN system 10 is directly connected point-to-point between a plurality of stations 12. Thus, unlike FIG. 1A, in the WLAN system 10 illustrated in FIG. 1B, a separate access point 14 or a distribution system 16 does not exist, and a plurality of stations 12 may replace their role or some of them. Roles or functions may be omitted.

Although the WLAN system 10 has been described with reference to FIGS. 1A and 1B, a wireless network system including a WLAN system 10 according to an exemplary embodiment of the present invention is not limited thereto, and a combination or a completely different one thereof. It can be implemented as a system. In addition, the wireless network system according to an embodiment of the present invention may exist alone, but may interwork with another wireless network system, a mobile communication network, or a wired / wireless internet network.

For example, the WLAN system may provide roaming service by interworking with a mobile communication network, for example, Wideband Code Division Multiple Access (WCDMA). Specifically, when the WLAN system provides a voice service, a dual band dual mode (DBDM) terminal supporting both WLAN and WCDMA performs a voice call using a mobile communication network, and then supports the WLAN system. In the WLAN system can be automatically roaming seamlessly.

Whether the wireless LAN system 10 shown in FIG. 1A or the wireless LAN system 10 shown in FIG. 1B is transmitted between stations 12 or via a coupling process between the station 12 and the access point 14 to transmit data. Can be.

Connection Procedure

FIG. 2 is a flowchart illustrating a coupling process for data transmission in the WLAN system of FIG. 1A. Although the WLAN system of FIG. 1B and the various wireless network systems described above are partially different from those of FIG. 2, detailed descriptions are omitted since they include a coupling process for transmitting substantially the same data.

1A and 2, the combining process 20 for data transmission between the station 12 and the access point 14 in the WLAN system 10 includes a scanning process (S10) and an authentication process (Authenticaion). , S12), and association (S14). The station 12 and the access point 14 perform a data transmission process S16 via the above processes S10, S12, S14.

Scanning (S10) is a process of finding a neighboring access point 14 using a beacon or probe message.

The discovery process S10 may include passive scanning to find the access point 14 from a beacon message broadcast by the access point 14 periodically, and the station 12 requests a probe for each channel. Broadcasts a message or frame (Probe Request), receives the received probe response message (Probe Response) such as its SSID (Service Set ID) and operation speed from the access point 14 to select the corresponding access point (14) It includes an active search process. The beacon message stores various capabilities (speed, encryption, etc.) that the access point 14 can support, and an SSID (Service Set ID) which is a service group name to which the access point 14 belongs.

The authentication process (Authenticaion, S12) is a process for the station 12 that has selected the appropriate access point 14 by the discovery process (S10) to prove that it is a valid terminal for the access point (14). That is, the authentication process (Authenticaion, S12) is a process of negotiating the authentication procedure and encryption method with the access point (14). In most cases, since the Open System authentication method is used, the access point 14 authenticates the authentication request from the station unconditionally. Enhanced authentication methods include IEEE 802.1x-based EAP-TLS, EAP-TTLS, EAP-FAST, and PEAP.

Association (S14) is a process in which the station 12 accesses the access point 14 after successful authentication. The connection process S14 means establishing an identifiable connection between the station 12 and the access point 14. When the connection process S14 is completed, the station 12 may communicate with another station 14 via the access point 14.

The association process S14 stores an AID (Association ID) that allows the access point 14 to be distinguished from other stations when the station 12 sends an association request message or frame to the access point 14. This is done by sending an Association Response message.

The station 12 and the access point 14 perform a data transmission process S16 via the above processes S10, S12, S14.

Reassociation

Similar to the association process (S14) is a reassociation process (Reassociation). The reconnection process is a process in which the station 12 connects with the access point 14 connected to another access point. The reconnection process is a process of establishing a new association with another new access point 14 when the signal weakens from the access point 14 to which the station 12 is connected.

In the reconnection process, the frame stored in the existing access point 14 is also transmitted through the newly connected access point 14. Specifically, when the station 12 sends a reassociation request message in which the address of the existing access point 14 is stored in the Current AP item, the access point 14 stores an AID that can be distinguished from other stations. An Association Response message is sent to the station 14. In addition, the newly connected access point 14 requests the Inter-AP Protocol (IAPP) to relay the frames stored in the existing access point 14 to itself.

Presence service during connection or reconnection

A communication method in a wireless network according to an embodiment of the present invention is a wireless network, for example, in the wireless LAN system shown in Figs. 1A and 1B, a station supporting a presence capability (Presense Capability), its location A method of transmitting an association request or association request frame including location information and location capability is provided.

In addition, the communication method in a wireless network according to an embodiment of the present invention, the station that supports the presence capability (Presense Capability), including the location information (location information) and location capability (location capability) An association response or reassociation response frame may be sent. However, since the association response or reassociation response frame is substantially the same as the method described above, a detailed description thereof will be omitted.

Here, the station supporting the presence capability may be a plurality of stations 12 shown in FIGS. 1A and 1B, and basically includes an access point including the same physical layer and MAC layer as the station 12. 14) may be used. Accordingly, the term "station" is used herein to mean not only the plurality of stations 12 shown in FIGS. 1A, 1B and 2 but also the access point 14. Use them only if you need to distinguish them.

In a communication method in a wireless network according to an embodiment of the present invention, Table 1 and Table 2 (Table 1 and Table 2) in a request frame or a message of the association or reassociation process shown in FIG. Add presence parameters, such as using English commonly used in the world, and the same in the following tables). The response frame or message of the concatenation process or the reassociation process may further include presence parameters such as Tables 1 and 2.

Order Information Notes 10 Wireless Network Management Capability Wireless Network Management Capability is present if dot11WirelessManagementImplemented is true. 11 Supported Regulatory Classes Supported Regulatory Classes Capability is present if dot11WirelessManagementImplemented is true. 12 Presence Parameters The Presence Parameters element is present if dot11WirelessManagementImplemented is true and the non-AP is capable of Presence Reporting.

Order Information Notes 12 Wireless Network Management Capability Wireless Network Management Capability is present if dot11WirelessManagementImplemented is true. 13 FBMS Request FBMS Request may be present if dot11WirelessManagementImplemented is true and FBMS bit in the Wireless Network Management Capability is set to 1. 14 Supported Regulatory Classes Supported Regulatory Classes Capability is present if dot11WirelessManagementImplemented is true. 15 Presence Parameters The Presence Parameters element is present if dot11WirelessManagementImplemented is true and the non-AP is capable of Presence Reporting ..

In this case, the order of the presence parameters in Table 1 and Table 2 may be arbitrarily determined and may be changed according to circumstances, and other information other than the presence parameters may be included in the connection or reconnection request or response frame or message. May or may not be included.

3 is a flowchart of a communication method in a wireless network according to an embodiment of the present invention.

As shown in FIG. 3, in the wireless network according to an embodiment of the present invention, the communication method 30 may include a request for connection and / or retransmission among frames transmitted from the station 12 to the access point 14. Add presence parameters in the reassociation request to be described in detail below, and use the presence descriptor in the presence parameters to determine the presence of the station 12. Or transmit capability information related to location tracking to the access point 14. In the case of a WLAN, this may be regarded as one procedure belonging to a presence request procedure, which will be described later, to be defined in IEEE 802.11v.

Accordingly, according to the communication method 30 according to an embodiment of the present invention, in a wireless network, for example, a WLAN, a presence response according to the presence request or the presence request for the presence service. Together with the presence capability associated with the presence of the station 12 or the location capability associated with the location information to the access point 14 in the connection or reconnection process. When the connection or reconnection request is made, the presence capability related to the presence of the station 12 or the location capability related to the location information may be delivered. Accordingly, the access pointer 14 can communicate the location information of the station 12 to the station 12 without the presence request from the station 12. As a result, the presence service can be simplified and the presence service can be provided quickly.

On the contrary, in the connection or reconnection response during the connection or reconnection, the access point 14 may also transmit the presence capability associated with its presence or the location capability associated with the location information. Can be. Accordingly, the station 12 may know in advance the location capability associated with the presence capability or the location information of the access pointer 14.

4 is a flowchart of a communication method in a wireless network according to another embodiment of the present invention.

As shown in FIG. 4, in the wireless network according to an embodiment of the present invention, the communication method 40 is an association request and / or re-transmission among frames transmitted from the station 12 to the access point 14. In the reassociation request, the presence parameters, which will be described in detail below, are added, and the location data of the station 12 is used by using the location data in the presence parameters. To pass. In this case, when the location data is transmitted, the format of the information indicating the location data that is actually delivered is transmitted using a location descriptor.

In the case of WLAN, this is regarded as one procedure belonging to a presence request procedure and a presence advertising procedure, which will be described later in IEEE 802.11v.

By a communication method 30 according to another embodiment of the present invention, in a wireless network, for example, a WLAN, a procedure for tracking a location of a station (Presence Request) or a preparation procedure for location tracking are performed. After performing the Presence Configuration Request and before performing the Presence Configuration Request, if the station 12 knows its location data, it connects or reconnects the location data of the station 12. In the process, the connection or reconnection request may be delivered to the access point 14.

As a result, since the access point 14 already knows the location data of the station 12, the access point 14 may provide a presence service that is suitable for the station 12, and the station 12 may be provided with various presence services that are suitable for itself. . Accordingly, the presence service can be quickly provided by simplifying the procedure for providing the presence service.

In this case, the method for the station 12 to calculate or obtain its location data may vary. For example, the station 12 may allow the access point 14 to calculate its location and receive the calculated location through a beacon or probe response message, or receive the location of the access pointer and use it as its location information. have. Alternatively, the station 12 may calculate its own location directly from the timing information provided from the access point 14.

As another example, when the station 12 includes a Global Positioning System Receiver (GPS), location data of the station 12 may be calculated by receiving satellite signals from GPS satellites.

As another example, if the station 12 is, for example, dual-band dual mode (DBDM) capable of using WCDMA with a WLAN system or interworking WLAN in 3GPP and 3GPP2 is supported, The location information or location data of the station 12 may be provided from the radio base station.

Conversely, in the connection or reconnection response in the connection or reconnection process, the access point 14 may also transmit its location data to the station 12. Accordingly, the station 12 may use the location information of the access pointer 14. For example, as described above, when the station 12 calculates its location data, the location data or location information of the access point acquired in the connection or reconnection process may be used.

At this time, the presence parameter information element added in the connection and reconnection request and / or response is shown in Table 3.

Identifier Field name One Presence Indication Parameters 2 Presence Indication Channels 3 Presence Request Options 4 Presence Status 5 Location Service Parameters 6 Radio information 7 Timing Measurements 8 Motion 9 Location Descriptor 10 Location data 11 Location ID 12-254 Reserved 255 Vendor Specific

Each field of the presence parameter information element added in the connection and reconnection request described in Table 3 will be described in detail below.

1.Presence Indicaion Parameters field

This Presence Indicaion Parameters field indicates STA presence reporting characteristics and includes a report period and the like. The format of this presence indication parameter field is as shown in FIG.

5, 1) The Normal Report Interval is the time in seconds that stations 12, 14 wish to report or report their presence when the stations 12, 14 are fixed. Interval. 2) Normal Number of Frames per Channel (Normal Numer of Framses per Channel) is the number of presence request frames per channel to be sent or expected to be sent by stations 12 and 14, respectively, at a fixed report interval.

3) In-Motion Report Interval is the time interval in seconds that station 12, 14 expects to report or report its presence when station 12, 14 is in operation. to be. If motion search is not supported, this field is set to "0". The definition of motion and the means for determining the motion are outside the scope of this specification. 4) In-Motion Number of Frames per Channel is the number of presence report frames per channel to be sent or expected to be sent by stations 12 and 14 at each in-motion report interval. If motion search is not supported, this field is set to "0". 5) Inter-frame Interval is the time interval in milliseconds between each fixed transmission and in-motion frame per channel.

2. Presence Indicaion Channels field

The Presence Indicaion Channels field indicates presence reporting channel information. The format of the presence indication channels field is as shown in FIG.

3. Presence Request Options

The presence request options field indicates a field to be included in the presence response frame next time. The format of the presence request option element is shown in FIG.

The option field (Option) shown in FIG. 7 is a bit field used to distinguish a desired presence parameter field to be included in the presence response frame next. A value of "1" for a given bit specifies that the field is included, and a value of "0" specifies that the field does not need to be included. All reserved values are set to "0". Table 4 shows the available options.

Bit Included Field 0 Timing Measurements One Radio information 2 Motion 3-15 Reserved

4.Presence Status field

The presence status field indicates a result of the requested presence information. The presence status field indicates whether or not the status is successful in the status field and transmits the result. The format of this presence status field is shown in FIG.

The data field (Status) shown in FIG. 8 indicates the result of the presence request, and among the values shown in Table 5, is one of success, failure, reject, and incapable.

Status Value Description 0 Success One Fail 2 Refuse 3 Incapable 4-255 Reserved

5. Location Services Parameters

The Location Services Parameters field indicates a service capability that the stations 12 and 14 intend to use. That is, the Location Services Parameters field indicates the start or end, period, etc. related to the location service. The format of the location service parameters is as shown in FIG.

The Location Service State field shown in FIG. 9 defines whether the station 12, 14 requests to start or end location services. The Location Service State field is shown in Table 6. 2) Location Service Interval is a time interval that requests that stations 12 and 14 receive location data.

State value Description 0 Stop One Start

6. Radio Information field

The Radio Information field includes radio information. That is, the radio information field is a field indicating the actual radio situation such as antenna information, received RSNI, and the like. The format of the Radio Information field is as shown in FIG.

10, 1) transmit power is a transmit power of a radio for transmitting a presence frame, the length is octet and is an integer value reported in dBm units. A value of -127 indicates that the trace power is unknown. 2) Antenna ID is an identification number for an antenna used to transmit a presence frame. 3) The antenna gain is the gain of the antenna to which the presence frame is transmitted, and the length is an octet and is an integer value reported in dBi units. 4) The Received RSNI field includes the RSNI value (dBm) measured for the most recently received presence request frame. 5) The RCPI field contains the RCPI value measured for the most recently received presence request frame. A value of -127 indicates that the RCPI value is unknown.

7. Timing Measurement field

The timing measurement field indicates a measured timing value. The format of the timing measurement field is shown in FIG.

The timing difference unit shown in Fig. 11 is shown in Table 7.

Timing Difference Units Description 0 Microseconds One Hundreds of Nanoseconds 2 Tens of nanoseconds 3 Nanoseconds 4 Tenths of Nanoseconds 5-255 Reserved

8. Motion field

The motion field indicates information related to the actual motion and may transmit a character and a speed value of the motion. The format of the motion field is shown in FIG.

The motion indication field shown in FIG. 12 is defined as shown in Table 8.

Motion Indicator Value Description 0 Stationary One Start of motion 2 In motion 3 End of motion 4 Unknown 5-255 Reserved

9. Location Descriptor field

The Location Descriptor field is used to transmit the Location Capability of the stations 12 and 14. At this time, the format of the Location Descriptor field is shown in FIG.

In order to indicate the location capability of the stations 12 and 14 among the location descriptor fields shown in FIG. 13, a location descriptor (Bits 4-7) or a location resolution descriptor ( Location Resolution Descriptor).

An example of the values of the location descriptor (bits 4-7) is shown in Table 9.

Format Description 0 CIVIC One GEO 2 Vendor Specific 3-15 Reserved

As described in Table 9, the location descriptor (Location Descriptor, Bits 4-7) specifies the format of the location data included in the connection or reconnection request frame to be described later.

That is, "GEO" represents the actual position coordinate value in the location data, and "CIVIC" means displaying the administrative address and the building in the location data (for example, the 3rd floor of the LG Research Institute, Umyeon-dong, Seocho-gu, Seoul).

GEO and CIVIC formats and rules of use are defined in the Internet Engineering Task Force (IETF) Request For Comments (RFC) 4119. The rules of use for location information recipients are defined by RFCs 4119 and 3693.

Other examples of values of the location descriptor (bits 4-7) are shown in Table 10.

Format Description 0 CIVIC One GEO 2 CIVIC and GEO 3 Vendor Specific 4-15 Reserved

"GEO" and "CIVIC" described in Table 10 are the same as described with reference to Table 9. "CIVIC and GEO" means support both "CIVIC" and "GEO".

Another example of values of the location descriptor (bits 4-7) is shown in Table 11.

Format Description 0 CIVIC One GEO 2 CIVIC Preferred 3 GEO Preferred 4 Not Supported 5 Vendor Specific 6-15 Reserved

"GEO" and "CIVIC" described in Table 11 are the same as described with reference to Table 9. Meanwhile, "CIVIC preferred" supports both "CIVIC" and "GEO" but prefers "CIVIC", while "GEO Preferred" supports both "CIVIC" and "GEO" but prefers "GEO". to be. "Not supported" means that we do not support presence (location tracking).

By adding new "CIVIC preferred" and "GEO Preferred" shown in Table 11, it is possible to provide a variety of location services by supporting the designation of both "CIVIC" and "GEO". That is, even if the stations 12 and 14 support both "CIVIC" and "GEO", it is possible to designate a preferred location service, thereby improving the quality of the presence service.

As described in Tables 9 to 11, when including a location descriptor indicating location capability in a connection or reconnection request or response message or frame, the location descriptor according to the situation of the wireless network system or the needs of the presence service. The value of can be defined as shown in Tables 9 to 11. Of course, the location descriptor included in the connection or reconnection request or response message or the presence parameters of the frame is not limited to Tables 9 to 11, and various modifications are possible. For example, a location descriptor may define only one of "GEO" and "CIVIC".

The Location Resolution Descriptor (0-3 Bits) of the Location Descriptor field shown in Fig. 13 is shown in Table 12 and Table 13, which specify the Location Resolution (4 Bits) and the Accuracy. It has a subfield. The Location Resolution Descriptor of Table 12 allows the stations 12 and 14 to select and send the maximum resolution that can be supported.

Resolution Description 0 Highest possible One Building resolution 2 AP resolution 3 XY resolution 4-15 Reserved

Accuracy Description 0 No accuracy estimate One Include accuracy estimate

The encoding descriptor field indicates the location data encoding as shown in Table 14.

Encoding Value Description 0 LCI One Text 2 ASN.1 3-255 Reserved

Here, 1) "0" value indicates that the location data object is defined in the binary format shown in RFC 3825. 2) A value of "1" indicates that the location data object is defined by plain-text XML (XML) defined by the schema in RFC 4119. 3) A value of "2" indicates that a location data object is defined as ASN.1 per X.694.

10. Location Data field

The Location Data field provides location data. The format of this Location Data field is shown in FIG.

1) Location Accuracy Estimate shown in FIG. 14 may or may not be included depending on the options requested or supported by the station 12, 14 that sent the location data field. Location Accuracy Estimates increase in 0.1-meter increments and can be expressed in a range that can be expressed in 32 bits. 2) Location Value includes Location Data that matches the format defined by the Location Descriptor.

In this case, the location descriptor field described above and the location source ID (described above) to indicate when the actual location value included in the location data field is expressed and in what format and accuracy are measured. Location Source Identifier).

11.Location ID field or Location Source Identifier field

The Location ID field indicates when the actual location value included in the Location Data field has been measured. The format of the Location ID field is as shown in FIG.

1) Timezone Offset shown in FIG. 15 represents a Time Zone. Here, the default timezone offset is "0", which means UTC. The location timestamp indicates the time at which the location value included in the location data field is measured. The location timestamp can represent hours, minutes, seconds, and hundredths of seconds expressed in UTC as shown in Table 15. have.

Octet Description 0-2 Milliseconds (0-999) 3 Seconds (0-59) 4 Minutes (0-59) 5 Hours (0-23)

In this case, when the stations 12 and 14 cannot display and transmit time information, the time zone and timestamp values are displayed as 0 to be transmitted. The public identifier link, the id of the link (for example, an IP address or similar actual link information) to check whether the location data or location value received is correct or not incorrect, is a string. The value complies with RFC 3693. In other words, a Public Identifier Link is used to allow an external agent (an external client that uses actual location data over an access point, which is a kind of application) to confirm the validity of the location value measured by the station. do.

The communication method in the wireless network providing the presence information in the connection or reconnection process has been described above. Providing the presence information in the connection or reconnection process described above, in the case of WLAN, falls within the presence request procedure and presence advertising procedure to be defined in IEEE 802.11v. It can be considered as a procedure.

Hereinafter, a presence procedure for providing a presence service will be described. In this case, the presence procedure may include the same or similar procedures and contents, parameters, formats, and elements for providing the presence information in the connection or reconnection described above. Accordingly, the following description of the presence procedure refers to procedures and contents, parameters, formats, elements, and the like for providing the presence information in the linking or reconnecting process described above, but does not mean that they are exactly the same.

Presence Precedure

As shown in Fig. 16, the presence procedure 50 for providing the presence service includes a presence preparation step S50 and a presence step S52. The presence preparation step S50 is further divided into a presence preparation request step S54 and a presence preparation response step S56. In addition, the presence step S52 is also divided into a presence request step S58 and a presence response step S60.

Through this presence procedure, the means for communicating between users to the station 12 and the access point 14 of FIGS. 1A and 1B (eg, the communication means is an instant message, a mobile phone, an e-mail, etc.), Presence services, such as the willingness to communicate (e.g., only when urgent, away, busy), and the ability to communicate (e.g. voicemail, voice or video, mobile or fixed, multilingual) Can be provided.

1.Presence Configuration Precedure

In order to support the Presence Capability or Presence facility, the first preparation required is to exchange frames periodically for the purpose of collecting the data needed for location determination. The second preparatory action is to establish a location service that periodically provides location estimates (calculations) to adjacent stations 12 or access points 14.

First, the stations 12 and 14 may present presence parameter information elements in a beacon, a probe request, and a probe response of the stations 12 and 14 described with reference to FIG. 2. Element) or a presence parameter information element (Presence Capability or Presence facility) in the presence configuration request or response frame (Presence Configuration Request or Response frame) Location data validation can be implemented.

That is, referring to FIGS. 17 and 18, the beacon or probe request and the probe response shown in FIG. 2 also include a presence parameter information element. The presence preparation procedure may be performed in the same manner as the request or preparation response frame. Performing the presence preparation procedure in the beacon or probe request and probe response is the same as the presence preparation procedure described below, and thus will be replaced with the description of the presence preparation procedure.

1) Presence Configuration Request

The presence configuration request frame may be broadcaster or unicast similar to the probe request frame. The stations 12 and 14 that have received the unicast presence preparation request frame have a presence response frame including a presence parameter information element indicating a result of the request in a presence status field. Will respond with a Presence Response frame. The stations 12 and 14 that have received the broadcast presence request frame will not be able to send a presence preparation response frame.

That is, a station 12, 14 that wants to implement another adjacent station 12, 14 to periodically transmit the presence preparation request frames for the purpose of collecting data on the client location is a beacon or probe response, presence preparation. The presence parameter information element is sent to the neighboring stations 12, 14 in the request frame, so that the purpose can be achieved. The presence parameter information element may include the presence indication parameters of FIG. 5 representing the desired behavior and the presence indication channel fields shown in FIG. 6.

This presence parameter information element may include the location service information sub-elements shown in Figures 9 and 6 that illustrate the desired behavior. In addition, this presence parameter information element may include the presence request options and vendor specific information shown in FIGS. 7 and 4.

If the presence preparation request frame sent to the stations 12 and 14 is a unicast presence preparation request frame, the other adjacent stations 12 and 14 include a presence status field indicating whether the request is successful or not. Respond with a presence preparation response frame. Receiving this presence preparation response frame, the stations 12 and 14 can start or stop the service using the state fields shown in Figs. 8 and 5 in the location parameter information element.

In addition, referring to FIG. 19, in a method 60 for communicating with a wireless network according to another embodiment of the present invention, one station 12 and 14 has its own presence capability and / or Transmitting a presence configuration request including a presence parameter including location data to another station 12 and 14 through a wireless network system, for example, a wireless LAN system. And other stations 12 and 14 receive the presence preparation request over the wireless network.

The latter station 12, 14 described above receives the presence preparation request described above and then sends a Presence Configuration Response of the ACK for this presence preparation request.

Conversely, irrespective of the operation of the former station 12, 14, the latter station 12, 14 described above also has its own presence capability as well as the former station 12, 14 described above. ) And / or a presence configuration request including a presence parameter including location data may be transmitted through a wireless network system, for example, a wireless LAN system.

At this time, the presence preparation request or response transmitted or received by the stations 12 and 14 of the front and rear includes their own presence capability or their own presence capability. Location Data may be included together with Presence Capability.

When the presence preparation request includes location data together with its presence capability, the format of the presence preparation request frame is shown in FIG. 20.

20) 1) The Category field is set to a value that specifies a Wireless Network Management category. 2) The Action field is set to a value that specifies the presence preparation request. 3) The dialog token field is a "nonzero" value that distinguishes the presence preparation request / response negotiation. This dialog token is unique for each presence preparation request frame sent to a given destination MAC address. 4) The presence parameter element field includes a presence parameter element.

Allowed presence parameter element fields for the presence parameter element included in the presence preparation request frame include the presence indication parameters of FIG. 5 representing the desired behavior and the presence indie shown in FIG. Presence Indicaion Channels field, Presence Request Options shown in FIGS. 7 and 4, Location Descriptor field shown in FIG. 13 and Tables 10-14. A location data field shown in 14, a location ID shown in Fig. 15, and vendor specific information are included.

2) Presence Configuration Response

When the presence preparation response includes Location Data together with its presence capability, the format of the presence preparation response frame is shown in FIG. 21.

1) The Category field is set to a value that specifies a Wireless Network Management category. 2) The Action field is set to a value that specifies the presence preparation response. 3) The dialog token field is set to a "nonzero" value received in the presence preparation request frame to distinguish the presence preparation request / response negotiation. 4) The presence parameter element field includes a presence parameter element.

Allowed presence parameter element fields for the presence parameter element included in the presence preparation response frame include the presence indication parameters shown in FIG. 5 and the presence indication channel shown in FIG. Presence Indicaion Channels, the presence status shown in Figs. 8 and 5, the Location Descriptor field shown in Figs. 13 and 10 and 14, and the location data shown in Fig. 14 A field includes a location data field, a location ID shown in Fig. 15, and vendor specific information.

In particular, the presence parameters included in the presence preparation request or response frame include the location descriptor field of the various schemes shown in Figs. Presence Capability may be provided to other stations 12 and 14.

Furthermore, the presence parameter included in the presence preparation request and response frame includes a location data field, and the location data field may be provided to another station by including the location information of the rotation and its location data.

 As a result, in the presence preparation request step, that is, preparing or setting the presence, the presence capability or location data is provided in advance, thereby simplifying the presence procedure to be followed. In addition, since the location is provided in advance, the load of the stations 12 and 14 can be reduced or adjusted. Accordingly, the users of the stations 12 and 14 may be provided with the quick presence service when the presence service is desired.

In particular, since the descriptor field is included in the presence preparation request and response frame but the other fields remain the same, the presence preparation frame of the presence preparation request and response frame may be used in advance. Location data may be provided in advance.

2. Presence Precedure

17 and 18, the presentation described below also includes a presence parameter information element in the beacon or probe request and probe response shown in FIG. The presence procedure may be performed in the same manner as the request or response frame.

That is, in the wireless network system shown in FIG. 1A, for example, a wireless LAN system (BSS), the stations 12 and 14 may beacon or probe requests, response frame presence parameter information elements (beacon or Probe Request, Rresponse frame presence). parameter information element) to send a presence request or response frame to be described later. For example, stations 12 and 14 may move from one Extended Service Set (ESS) (an extended group of multiple access points to a distribution network using Ethernet, allowing interconnection between stations). When the stations 12 and 14 are described in the beacon or probe request, probe response frames of the new ESS, they may send a presence request or response frame.

Performing the presence procedure in the beacon or probe request, probe response is the same as the presence procedure described below, and thus will be replaced by the description of the presence procedure.

1.Presence Request

First, a Presence Request frame can be sent for various purposes, including providing location information to adjacent stations or exchanging frames for location calculation purposes.

Stations 12 and 14 send presence request frames and thus periodically advertise their presence. The presence request frame may be broadcast or unicast similarly to a probe request frame. When not associated with AP, presence request frame may be sent by station 12.

In the wireless network system shown in Fig. 1A, for example, a wireless LAN system (BSS), a presence request frame can be sent to one access point 14 (when sending by unicast), and other access points ( 14) (when sending by broadcast). The presence request frame is not sent in the wireless LAN system (IBSS) shown in FIG. 1B.

For example, the station 12 requests its location information from an adjacent station 12 or access point 14 supporting location services. To request a location, station 12 sends a presence request frame with a presence parameter information element that includes a Location Descriptor. In the presence request frame, the location descriptor specifies "local".

The station 12 specifies a format descriptor, a resolution descriptor, and an encoding descriptor to be received in a presence response. The allowed presence parameter element fields for the presence parameter element included in the presence request frame are shown in FIG. 10 along with the location descriptor shown in FIGS. 13 and 9 to 14 described above. Radio information), motion shown in FIG. 12, presence request options shown in FIGS. 7 and 4, vendor specific information, and the like.

The stations 12 and 14 may request remote location information from the neighboring station 12 or the access point 14 supporting the location service. To request a location, send a presence response frame with a presence parameter information including a Location Descriptor element in the presence response frame. In the presence response, the location descriptor specifies "Remote". The stations 12 and 14 specify a format descriptor, a resolution descriptor and an encoding descriptor to be received. The STA may define a vendor descriptor (Vendor Descrptor).

Stations 12 and 14 that support presence capability may send a presence request frame for the purpose of providing data for the station's presence. Stations 12 and 14 may be used at requested intervals on the requested channel, which may be defined by the beacon or probe response, the presence parameter information element requested in the presence configuration request frame. A presence request frame can be sent.

Stations 12 and 14 include radio infomation and a motion element in the corresponding requested presence parameter information element as requested by the presence request options element. do. Stations 12 and 14 that have sent a presence response frame may present a presence request option element to indicate whether radio information, timing measurement, and motion elements are required for the corresponding presence response frame. Include. If the presence request option element is not included, the presence response frame is not sent.

The presence response frame is sent in response to the received presence request frame, and provides a presence reporting parameter to the station. The presence response frame is sent by the station in response to the received presence request frame with a response request bit of "1". The presence response frame, beacon and probe response frame provide the presence reporting parameters to the station.

2. Presence Response

Stations 12 and 14 that support the presence capability and receive the presence request frame including the presence parameter information element or the data description element containing the presence service parameter element indicate the result of the request. It may respond with a presence response frame including a location descriptor and a location data element requested for the presence request option element and the presence status.

Depending on the options defined in the location descriptor of the response frame, the stations 12 and 14 may include a location ID element in the response frame. Stations 12 and 14 also set the format, resolution, and encoding descriptors in the location descriptor, matching the location data element content. If the responding station 12, 14 can respond with a value that matches a response that is not defined in the location description element, the station 12, 14 will send a response with a presence status element indicating "Failed". Can be.

The format of the presence response frame is shown in FIG.

22, 1) The Category field is set to a value that specifies a Wireless Network Management category. 2) The Action field is set to a value that specifies the presence preparation response. 3) The dialog token field is set to a "nonzero" value received in the presence preparation request frame to distinguish the presence preparation request / response negotiation.

4) Management Action Pending is set to "0" if the management action is not pending at the destination station and is set to "1" if there is a management action being padded at the destination station. A value of "255" in the management action pending field indicates that the station has stopped sending the presence request frame. 5) The presence parameter element field contains a presence parameter element.

The allowed presence parameter element fields for the presence parameter element included in the presence response frame are described in Radio Information, Timing Measurement, Motion, Location Data, The location descriptor may include a location descriptor, a presence status, a location ID, and vendor specific information.

23 is a flowchart of a communication method in a wireless network according to another embodiment of the present invention.

Referring to FIG. 23, in a wireless network according to another embodiment of the present invention, a communication method 70 includes one location 12 and 14 having location data together with its presence capability. And transmits a presence request including a presence parameter to the other stations 12 and 14 through a wireless network system, for example, a wireless LAN system. 14) provides a method for receiving this presence request over a wireless network.

The latter station 12, 14 described above receives the presence request described above and then transmits a presence response of an ACK for the presence request (ACK).

The format of the presence request frame is as shown in FIG. 24 when the presence request includes Location Data with its Presence Capability.

1) The Category field shown in Fig. 24 is set to a value that specifies a Wireless Network Management category. 2) The Action field is set to a value that specifies the presence request. 3) The dialog token field is a "nonzero" value that distinguishes the presence preparation request / response negotiation. This dialog token is unique for each presence request frame sent to a given destination MAC address. 4) The presence parameter element field includes a presence parameter element.

Allowed presence parameter element fields for the presence parameter element included in the presence request frame are: Radio Information shown in FIG. 10, Motion shown in FIG. 12, FIG. 13 and Tables 9 to Table. The location data field shown in Fig. 14 together with the location descriptor shown in Fig. 14, the presence request options shown in Figs. 7 and 4, the vendor specific information, and the like. Data field) and a location ID shown in Fig. 15.

That is, the presence parameter included in the presence request frame includes a location data field, and the location data field may be provided to another station by including the location information of the rotation and its own location data.

 As a result, since the presence request step, that is, providing its own presence capability to other stations in advance, provides its own location information, thereby simplifying the presence procedure to be followed. In addition, since the location is provided in advance, the load of the stations 12 and 14 can be reduced or adjusted. Accordingly, the users of the stations 12 and 14 may be provided with the quick presence service when the presence service is desired.

In particular, since the descriptor field is included in the presence preparation request and response frame but the other fields remain the same, the presence preparation frame of the presence preparation request and response frame may be used in advance. Location data may be provided in advance.

Who provided the presence information and the order of progress

The presence of stations required for presence services by adding or adding new presence parameters including location descriptor fields and location data in the beacon or probe request, probe response, presence preparation request, presence request, and presence response. The provision of the capability or location data in advance has been described.

In this case, the subject that includes the presence capability or location data in the presence parameter and provides it to another station or access point may be the station 12 shown in FIGS. 1A and 1B or may be the access point 14. . 25 shows an example in which the provider may be the station 12 or the access point 14.

FIG. 25 shows that when the first station 12a and the second station 12b can transmit data via the access point 14 as shown in FIG. The case where it is desired to know the presence capability of 12b) in advance is demonstrated, for example.

Referring to FIG. 25, the first station 12a transmits a presence preparation request frame including a location descriptor field in the presence parameters to the access point 14, and the access point 14 sends the request to the access point 14. This presence preparation request frame is transmitted to the second station 12b. Accordingly, the access point 14 and the second station 12b know in advance the presence capability of the first station 12a before the presence service.

In contrast, the second station 12b may also include its presence capability in the presence preparation response frame and provide the first station 12a to the first station 12a via the access point 14 in advance.

Of course, the presence preparation request and response frame may include location data as well as the presence capability of the station. Accordingly, the two stations 12a and 12b and the access point 14 know the presence capability and location data of the two stations 12a and 12b in advance.

The access point 14 may also provide its presence capability and location data in advance to the two stations 12a and 12b using the presence preparation request or response frame. The two stations 12a and 12b may calculate their location data using the location data of the access point 14.

In addition, the presence request frame and the presence capability and location data of the two stations 12a and 12b and the access point 14 may be provided in advance in addition to the presence preparation request and / or response frame. .

In addition, when the two stations 12a and 12b and the access point 14 are before the joining process, their presence capacities are previously displayed by using beacons, probe requests, and probe response frames shown in FIGS. 17 and 18. And location data can be provided in advance.

As described above with reference to FIG. 25, a communication method in a wireless network according to another embodiment of the present invention includes location information of a station even if one station does not receive a request for location data of a station required for presence service. And transmitting the presence parameter via a wireless network, and another station receiving the presence parameter through the wireless network.

That is, the presence parameter is included in one or more allowed or supported among beacon or probe responses, presence requests, presence preparation requests, connection requests, and reconnection requests between stations in a wireless network, and the presence parameters are transmitted. The performing may include the beacon or probe response, the presence request, the presence configuration request, the connection request, and the reconnection request step.

Priority of presence information

The presence of stations required for presence services by adding or adding new presence parameters including location descriptor fields and location data in the beacon or probe request, probe response, presence preparation request, presence request, and presence response. The provision of the capability or location data in advance has been described.

In this case, when the presence capability or location data of different stations is provided through the various frames described above, the priority or progress of the presence information may be represented by a presence response frame, a presence request frame, and a presence preparation response frame. , Presence preparation request frame, beacon and probu request and response frame. When the stations 12, 14 receive a new presence related frame of higher priority than before, they cancel the preparation before and start using the new preparation.

In addition, when the presence-related frame is transmitted by unicaster and broadcast, the priority-related frame transmitted to the unicaster may be high. For example, when the presence related information is received through the unicast presence preparation response frame and the broadcast presence preparation request frame, the priority of the unicaster presence preparation response frame may be high.

Embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited thereto.

The present invention has the effect of transmitting and receiving various information or data related to the presence service in a wireless network.

Claims (26)

One station transmitting, via a wireless network, data including a location descriptor, including both geographic coordinates and civic location; Receiving, by the other station, via the wireless network, data containing the location descriptor. The method of claim 1, And the location descriptor may indicate a preference among the geographic coordinates and the civic location. The method of claim 1, The data including the location descriptor may include a beacon or a probe request, a probe response, a presence request, a presence response, and a presence of the wireless network. Allowed during Presense Configuration Request, Presense Configuration Response, Association Request, Association Response, Reasssociation Request, and Reassociation Response Communication method in a wireless network, characterized in that included in one or more than one supported. Transmitting over a wireless network data including a location descriptor, including both geographic coordinates and civic location; Receiving via the wireless network data including location related information from another station. The method of claim 4, wherein And the location descriptor can indicate a preferred one of the geographic coordinates and the civic location. The method of claim 4, wherein Data including the location descriptor may be a beacon or probe request, a probe response, a presence request, a presence response, a presence preparation of the wireless network. Allowed or supported during Request Configuration Request, Presense Configuration Response, Association Request, Association Response, Reasssociation Request, and Reassociation Response Method of communication of a station in a wireless network, characterized in that included in one or more than one. The method of claim 4, wherein Wherein the location related information indicates one or more of a location descriptor or location data. The method of claim 4, wherein And the location related information received from the other station is location data that matches a format of location data defined in the location descriptor. Receiving, via a wireless network, data including a location descriptor that includes both geographic coordinates and a civic location; And transmitting data including location related information to at least one station via the wireless network. The method of claim 9, And the location descriptor can indicate a preference of the geographic coordinates and the civic location. The method of claim 9, Data including the location descriptor may include a beacon or probe response, a presence request, a presence response, a presence configuration request, and a presence configuration request of the wireless network. A method of communication of an access point in a wireless network, characterized in that it is included in one or more of allowed or supported among presence configuration response, association response, and reassociation response. The method of claim 9, And the location related information indicates one or more of a location descriptor or location data. The method of claim 11, And the location related information received from the station is location data that matches a format of location data defined in the location descriptor. A station for transmitting data, including a location descriptor, including a location descriptor, including both geographic coordinates and a civic location, through a wireless network; And another station receiving over the wireless network data including the location descriptor. The method of claim 14, The location descriptor may indicate a preference among the geographic coordinates and the civic location. The method of claim 14, The data including the location descriptor may include a beacon or a probe request, a probe response, a presence request, a presence response, and a presence of the wireless network. Allow of Presense Configuration Request, Presense Configuration Response, Association Request, Association Response, Reasssociation Request, and Reassociation Response Wireless network system, characterized in that included in one or more than one or supported. Transmits data over a wireless network, including location descriptors, including both geographic coordinates and civic location. A station of a wireless network system for receiving data, including location related information, from another station via the wireless network. The method of claim 17, The location descriptor may indicate a preference among the geographic coordinates and the civic location. The method of claim 17, Data including the location descriptor may be a beacon or probe request, a probe response, a presence request, a presence response, a presence preparation of the wireless network. Allowed or supported during Request Configuration Request, Presense Configuration Response, Association Request, Association Response, Reasssociation Request, and Reassociation Response Station of a wireless network system, characterized in that included in one or more than one. The method of claim 17, Wherein the location related information indicates one or more of a location descriptor or location data. The method of claim 17, And the location related information received from the other station is location data that matches a format of location data defined in the location descriptor. Receive data over a wireless network, including a location descriptor, including both geographic coordinates and civic location. An access point of a wireless network system for transmitting data including location related information to at least one station to the station via the wireless network. The method of claim 22, The location descriptor may indicate a preference among the geographic coordinates and the civic location. The method of claim 22, Data including the location descriptor may include a beacon or probe response, a presence request, a presence response, a presence configuration request, and a presence configuration request of the wireless network. Access point of a wireless network system, characterized in that included in one or more of the allowed or supported of the presence configuration response, association response, reassociation response. The method of claim 22, And the location related information represents one or more of a location descriptor or location data. The method of claim 22, And the location related information received from the station is location data that matches a format of location data defined in the location descriptor.

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