TWI445358B - Access to a wireless local area network - Google Patents

Description

Provides access to wireless local area networks, computer program components, and mobile stations

The present invention relates to a method of providing access to a wireless local area network, a method of providing information to a mobile station, a corresponding computer program elements, a mobile station, and an access service unit (access serving) Unit).

The Global System for Mobile Communications (GSM) Short Message Service (SMS) text message has become a method of exchanging GSM exchange short text messages between mobile communication devices. SMS is similar to the email storage and forwarding mechanism. However, when it uses a control channel as a data transfer, it will be limited to a 160-bit message. Being able to provide email to mobile users without the capacity limitations imposed on the SMS will make the user more appreciated.

E-mail services have been provided to mobile users related to the so-called 2.5-generation wireless communication mechanism, such as integrated packet radio communication service (GPRS) or code division multiple access (CDMA). The GPRS system is a method in which a mobile network, such as a GSM channel, can be used by multiple users to transmit IP (Internet Protocol) traffic. However, capacity is limited by the fact that IP traffic is carried over the GSM link. GPRS generally provides a total of 170 kbit/s per GSM cell, and this total is shared by all users in between. As the number of users increases, the amount of bandwidth available to each user decreases and the access time increases.

Wireless Local Area Network (WLAN) is an Ethernet-like network technology that allows customers to communicate with a high-bandwidth data within a limited range. In the United States, standardization is performed under the heading IEEE 802.11, and the currently deployed wireless local area network 802.11b provides 11 Mbit/s in the range of 100 m.

However, wireless local area networks only work with stationary or near-stationary devices. When the device speed exceeds 30km/hr, communication becomes impossible. The Doppler effect may result in a poor signal to noise ratio.

Each wireless local area network has a limited range, and a user must be authenticated and authenticated each time they enter a new wireless local area network. The access procedure includes at least the following steps:

1) Frequency discovery,

2) Password key exchange,

3) IP access configuration (allocation).

This access program may take a minute or more to execute. This is not a problem for users who can expect to be stationary at a certain location for a relatively long period of time, such as a user sitting in a coffee shop. However, for a user who has a very limited time at a certain place, such as a user sitting in the car in front of the traffic sign, the continuation of this access procedure is prohibited.

For the above reasons, the use of a wireless local area network other than a GSM or GPRS system allows the operator to provide a third generation service without the need to deploy expensive equipment and without the need to handle license issues. However, wireless local area networks may not be accessible by mobile or fast-moving users due to physical limitations. The mobile user must use a break to represent the stationary or near-stationary state of the mobile station to establish a connection and communication.

Therefore, it is necessary to improve the way to access a wireless local area network and to limit the time required to access a regional network.

Conventional techniques address the first category of wireless local area networks, where access points to different regional networks are coupled in some manner.

EP 0 851 633 A2 employs a backbone having one or more central server forms that communicate with access points via a hardwired connection. Each access point contains a transceiver to communicate with the mobile station. Each mobile station searches for an available access point by scanning an ISM band to establish a communication link with an access point. As long as a reliable connection is established, the mobile station interacts with other mobile stations, a server, or both. In the event that the mobile station is aware that the communication with the current access point is unacceptably weak, the mobile station begins a hand-over, which interrupts the communication with the current access point and establishes a communication. Communication with other access points. Such a handover procedure communicates to the first access point. The first access point then transmits a handover procedure preparation message to the next access point across the backbone, so that the next access point begins to accept and buffer the message scheduled to be the mobile station. The first access point is switched to the next access point.

In US 6,061,563, when a mobile station moves from a region that covers one of the first access points to an area that covers other access points, the mobile station needs this first access point to cancel the real link. This mobile station needs additional access points to connect with it. The other access point then registers the mobile station with a connection station list in the storage. The mobile station transmits link information about the first access point to the second access point to inform the second access point that the mobile station has moved from the area covered by the first access point.

According to EP 0 589 552 A2, the mobile station communicates an indication to the first access point in order to deliver a request to the second access point, ie the second access point receives a first access point The handover procedure of the coming action station. In response, the second access point transmits its operational parameters to the mobile station via the first access point, and the mobile station adjusts its own parameters in response to establishing communication with the second access point.

WO 02/09458 A2 provides a gateway server to a plurality of wireless local area networks, so that after disconnection, after reconnecting to a wireless local area network, an IP address is reassigned to the mobile station. Therefore, it provides seamless roaming of mobile stations from wireless local area networks to wireless local area networks.

According to WO 02/058324 A2, a routing map is maintained in a central wireless access communication system. The routing map maintains a list of mobile station locations that are operable to communicate with radio transceivers located within areas covered by different access points. This location can be updated as needed.

In EP 1 271 852 A2, an access point of a wireless local area network has a logical identities assigned to it, which is defined as the channel used by the mobile station. This allows roaming in a transparent manner.

According to other types of prior art, improvements have been made in establishing a connection from a mobile station to a wireless local area network. US 6,345,043 B1 shows an access structure that shortens the time interval of beacon transmissions when a mobile station power is turned on. In addition, this traditional certification aspect has been eliminated. Instead, it is retained for a period of time in each channel. Therefore, the mobile station can use this period to exchange control frames with the access points without competing with other stations to access the wireless medium.

The third type of conventional technology handles the operational mobile station, which is connected to a wireless local area network in a mobile environment.

Jatinder Pal Singh et al., "Wireless LAN Performance Under Varied Stress Condition in Vehicular Traffic Scenarios", published at IEEE Vehicular Technology Conference, Fall 2002, vol. 2, pp. 743-747, Vancouver, illustrating total throughput. And the signal-to-noise ratio is strongly dependent on the speed of the mobile station. The higher the speed of the mobile station, the worse the total throughput and the signal-to-noise ratio become.

According to Ryo Kimura's "3G and WLAN Data Communication Success in Japan" was published on the Internet on May 27, 2002 at http://www.3g.co.uk/PR/May2002/3449.htm in 2003 2 Accessible on the 14th of the month, it is a seamless data communication between different wireless communication technologies in a mobile car. When a 3G mobile phone system is switched between a wireless local area network, data communication continues seamlessly. However, it does not provide information on the speed at which mobile vehicles operate.

According to one aspect of the invention, a method of accessing a wireless local area network is provided. It provides a motion value that represents the motion state of the mobile station that will be connected to a wireless local area network. Depending on the value of the motion, establish a link between the mobile station and the wireless local area network.

In accordance with other aspects of the present invention, a method of providing access to a wireless local area network is provided. A mobile station will be connected to a wireless local area network, providing access to a motion value representative of the motion state of one of the mobile stations. Depending on the value of this motion, this mobile station accesses this local area network.

This motion value can be transmitted by the mobile station itself, as long as the mobile station can detect its own motion by an appropriate means, such as a sensor. In a preferred alternative, the motion value will be transmitted from outside the mobile station such that the mobile station will provide the motion value by obtaining the motion value from an external unit, and such that the mobile station can have a separate The function builds a link depending on the value of this motion.

By monitoring a motion value, if the actual location of the mobile station is covered by a wireless local area network, the mobile station can know that one of the mobile stations that are allowed to access the wireless local area network is stationary or nearly stationary. Therefore, access is only initiated or provided to the user when the opportunity to establish access is not limited by the physical limitations of the action. The proposed method provides an autonomic procedure to establish a connection to a wireless local area network as long as a speed interruption or near-inactivity condition is detected. In other specific examples, the user of the action is requested to agree before the link is established.

According to the invention, the term "wireless area network" is not limited to the type of technology standardized under IEEE 802.11, however, it preferably includes the technology specified in the standardization. Wireless local area network generally means a network that provides data communication with a wireless capability ranging from a few meters to several kilometers depending on the technology of the individual network.

A mobile station is preferably a device that provides at least limited computing power. Generally speaking, it is a device that can be carried by mobile users, including but not limited to a laptop computer, a PDA, a mobile phone or other mobile computing unit. (mobile computing unit).

In a preferred embodiment, the wireless local area network is accessible when the motion value is below a threshold value. Such a simple comparison allows for a quick and convenient assessment of an exercise value if the motion value is an integer or floating point number. However, this motion value can also be presented to the mobile station in a form that makes the evaluation easier, such as representing a value of content such as "OK for access" or "not OK for access". )". These values may have been prepared by the unit of the transmitted motion value.

Preferably, the motion value is a velocity value. Such a value represents a linear speed value of the mobile station suitable for evaluating whether any access to a wireless local area network is possible or impossible under current operational conditions. If the motion value is a velocity value and the velocity value is compared with a threshold value, the threshold value is preferably set to 30 km/h in the first specific example and 5 km/h in the second specific example. .

This motion value can be provided from a service unit that moves with one of the mobile stations of the mobile station. Such a transport mechanism can be a car that moves with the mobile user. The corresponding service unit can be, for example, a car's speedometer or a driver information system that collects car action information from a speedometer or tire rotation speed. These values are generally available in the car and may be transmitted to the mobile station via a suitable interface. This transport agency may also be a train and is equipped with a service unit similar to the information system, which presents the true speed of the train. Such a service system can be equipped with a communication system such as Bluetooth. The mobile station may also be equipped with a Bluetooth receiver, so it is possible to accept information on the movement of the transport agency, which represents the movement of the mobile station moving with the transport agency.

A less direct way of expressing the state of motion of the transporter, and the result of the mobile station moving with the transporter (preferably not associated with the transport agency, but of course), indicating a sport via a time value . This must be explained in this way, the transport agency is likely to display this movement for a specified period of time, or when the time arrives. For trains or buses with a schedule of approximately stationary arrivals and departures, and thus stationary stations can be used to access the wireless local area network, this value of motion represented by a time value may be considered an appropriate method. .

In another preferred embodiment of the present invention, it provides a look-up table that maps access parameters to a wireless local area network. This helps to improve the access time of the wireless local area network, such as when the frequency band cannot be scanned to find a matching frequency. This frequency and/or other access parameters such as authentication parameters or password parameters may already be stored in the lookup table, which is preferably part of the mobile station and may be used directly from the table on an access procedure. The time required to access/link the program is improved.

In addition to establishing a link to the wireless local area network depending on the actual action of the mobile station, the access function is preferably performed depending on the actual location of the mobile station. An access routine is redundant when no wireless zone unit covers the location of the current mobile station configuration.

In another embodiment, one of the locations of the mobile station is detected. This may be achieved by a Global Positioning System (GPS), which may be part of a mobile station or may be part of a transportation mechanism. When the transportation agency is a car, the car's navigation system can provide such information.

When the transport agency is a train, the train can also provide such information. Alternatively, a software may be installed at the mobile station to provide location information depending on the path and time entered by the user. Or the mobile station may be linked to a timetable URL to obtain this routing information, which is necessary to determine the location of the transportation agency at a certain time once the destination and routing are known. However, since the GPS receiver is expected to be a part of the mobile station, a GPS or an equal position detection system that is part of the mobile station may be a suitable method for determining the actual location.

In another preferred embodiment of the invention, the connected wireless local area network is derived from the lookup table and is dependent on the location of the mobile station. In general, this lookup table contains information about the areas covered by a wireless local area network. This coverage information may also be included in the network description itself. Whenever a link may be established, the location of the mobile station matches the area of the wireless local area network listed in the lookup table. Preferably, only when the actual location matches the area covered by the wireless local area network listed in one of the lookup tables, it is decided to establish a link to the dedicated wireless local area network because it is generally from the actual location. It seems to be accessible. If there is more than one match, a function may select a dedicated wireless local area network from several options to establish a link.

As long as a wireless local area network is selected for linking, for example, according to one of the above methods, the access parameters stored in the lookup table are preferably used to establish the link. In an access procedure, all relevant data with available network access is saved relative to relying on scanning or attempting error steps, saving time.

Another preferred embodiment relates to the procedure for updating this lookup table. Because there is a very large number of accessible wireless local area networks today, and the emergence or disappearance of wireless local area networks is a dynamic process, it provides all the wireless local area networks that are actually available and the individual memory they contain. Taking the parameter lookup table is an impossible task. However, maintaining a look-up table with information that is at least covered in the actual location, and/or at least the information of the wireless local area network covering the adjacent area is up-to-date, is highly valued. Therefore, the mobile station transmits a request to an access serving unit to receive such information. This requirement contains the actual location of the mobile station. Upon receipt of these messages, the access service unit can select a wireless local area network that is in the vicinity of the actual device location, or that covers the actual device location, and transmits corresponding access data for such a network to the mobile station. This mobile station receives this information and therefore updates this lookup table.

In particular, when this requirement includes the motion value of the mobile station, the access service unit can more accurately determine which wireless local area network may be suitable for the mobile station. If the transportation agency is a train, the mobile station may transmit the route and the station at the same time when transmitting the request. An access service unit may then be able to select all of the wireless local area networks that cover the location of the train stop, since the mobile station is in a stationary state where passengers of the train can access a wireless local area network. This access service unit may then transfer access parameters for all of these pre-selected networks to this mobile station.

This update routine may be executed regularly at all x seconds. This position detection unit can be triggered to detect this actual position every x seconds. The requirement to include the actual location may then be transmitted to this access service unit. As soon as the mobile station receives a response from the access service unit, the mobile station updates the lookup table with the transmitted information.

In the above paragraphs, the recipient of this requirement is called the access service unit. The access service unit can be one of a plurality of wireless local area network information servers and can be addressed via a URL. The operator of such a server can be an independent service provider.

The service provider can also be a service provider of a GSM or GPRS wireless network. This means that the mobile phone service provider maintains the services as described above and transmits the access parameters to the mobile station as required. This service provider must then maintain the tables and manifests covered by the wireless LAN and must keep them up to date. These lists are preferably stored in this access service unit 7. The communication required to update the lookup table of a mobile station is preferably performed on a GSM or GPRS or UMTS communication channel, such as SMS or other data communication service.

Thus, in accordance with another aspect of the present invention, a method of providing information from an access service unit to a mobile station is provided. The access service unit receives the requirements for wireless local area network parameters from a mobile station. This requirement contains the actual location of this mobile station. In response to this request, depending on the location of the mobile station, the access service unit transmits the access parameters of the wireless local area network to the mobile station, including a wireless local area network that does not cover the actual location of the mobile station but is a neighboring area. Access parameters.

In a preferred embodiment of this aspect of the invention, the access parameters of which wireless local area network to transmit are determined by the actual location of the mobile station.

Due to the current lack of a centralized wireless local area network data pool, it is preferred that the requirements and corresponding responses are transmitted via techniques other than wireless local area network wireless communication networks.

According to another aspect of the present invention, an access service unit is provided, comprising a control unit designed to perform the steps of the above method.

According to another aspect of the present invention, a mobile station is provided. The mobile station includes an interface for receiving a motion value representative of one of the motion states of the mobile station, an interface to a wireless local area network, and an access control unit, the design being dependent on the motion value to correspond thereto Interface to establish a link to the wireless local area network.

The interface for receiving the motion value may be an interface for connecting to one of the external service units of one of the transport mechanisms that moves with the mobile station, or may be an interface for connecting the mobile station with a motion detector.

Preferably, the mobile station includes a lookup table in which access parameters can be mapped to the wireless local area network.

Preferably, the mobile station includes a position detector to determine the actual location of the mobile station.

Preferably, the access control unit of the mobile station is designed to determine a wireless local area network to establish a link depending on the actual location of the mobile station and the items depending on the lookup table, and in particular by using Store the access parameters in the lookup table and establish a link to the wireless local area network.

The mobile station preferably includes a lookup table update unit to update the query by transmitting a pair of wireless local area network parameters to an access service unit and receiving wireless local area network parameters from the access service unit table.

According to other aspects of the present invention, a computer program component comprising a computer readable program code is provided. When the digital processing unit executes the code, one of the above methods is performed. It is possible to provide a computer program component to be loaded and executed on the access service unit. Other computer program components can be provided for loading and executing in the access service unit.

It will be appreciated that, in general, when the features are specifically described herein, and the features are described herein as a reference, the corresponding features may also be provided by the apparatus embodied in the invention, and vice versa.

In accordance with a preferred embodiment of the present invention, a mobile station tells its network operator unit/access service unit the current location, and at least the actual approximate speed of the mobile station. The network operator unit tells the mobile station about the characteristics of the wireless local area network, which is where the mobile station/action user may be located shortly after the location index. This mobile station/action user (when stationary and within range of a wireless local area network) uses this information to avoid frequency lookup steps and IP address configuration, and to use an operator defined as a secret. Authenticate itself.

Communication of this control information can occur on GSM or GPRS.

This location information is preferably obtained from a GPS receiver and is obtained from communication with certain electronic devices of the transportation facility. If the user is in a car, we can assume that this feature may be part of the car's service. When the user is using a public transportation facility, and is sitting on a train, the transportation mechanism can then inform the user of its location and speed via other means, such as Bluetooth.

The method by which the network operator unit determines where the user may be may be as simple as passing parameters of all wireless local area networks in the adjacent mobile station to the mobile station. Or, it may be more complicated when information must be extracted from the map and/or current traffic conditions. This mobile station may assist this operator unit, for example by telling the unit its possible stopping point.

The operator unit may decide (or be informed) that a user is on a train and then provide a full set of characteristics of the wireless local area network of the station where the train will be parked.

An operator unit may attempt to further reduce the transmission time by caching information on the wireless local area network that the user may stop. For example, if the user indicates that they are about to stop at a given service station and then after arrival, any current email may be accessed and may be transmitted.

When outside the range of a wireless local area network, the transport mechanism can store the user's emails and only transmit them when they are within range.

In a preferred embodiment, a mobile station includes a GPS receiver, a GPRS, and an IEEE 802.11 interface. Such a mobile station 1 is shown as part of a communication system as shown in FIG. The mobile station 1 is embodied as a mobile phone, and particularly includes a display 11, an interface 12 including an IEE802.11 interface for accessing a WLAN, an interface 13 for receiving a motion value, a GPRS interface 14, A location detector 15 includes a GPS receiver, and an access control unit 16 is designed to establish a connection to the WLAN via a corresponding interface 12, and a lookup table 17.

This mobile station 1 is currently in a state of motion, represented by a motion value mv (which is actually a speed value) because it is moved with the user on the transport mechanism 2 (actually a train). The transport mechanism 2 includes a service unit 21 having an interface 13 that can be coupled to the mobile station 1. This service unit 21 determines a motion value mv which is the actual speed of the transport mechanism for this purpose. Interfaces 22 and 13 may be embodied as a Bluetooth interface, for example. This exercise value mv is transmitted from the service unit 21 of the transport mechanism 2 to the mobile station 1.

In the vicinity of the path of the transport agency, the coverage of three different wireless local area networks 3, 4 and 5 is shown. The WLAN interface 12 of the mobile station 1 can theoretically establish a connection with all three WLANs 3, 4 and 5. Since WLANs 3, 4, and 5 may be operated by different service providers and under different physical conditions, mobile station 1 must use different frequencies, different authentication parameters, and different ID parameters. However, at the current location L of the mobile station, it is not possible to access any of the WLANs because the location L is not covered by any of the WLANs 3, 4 and 5.

However, WLAN 5 covers at least one future location L' of this mobile station 1, which is determined by the trajectory of the transport mechanism 2. The WLAN 5 is installed close to the train station 6, which is the next stop of the train.

The user of the mobile station 1 wants to access a WLAN as soon as possible and check the email in his account. Since he and his mobile phone 1 are stopped at the next train station 6 and are not enough to do a very time-consuming frequency check or authentication procedure, the mobile station provides a look-up table 17 with different WLAN access parameters. This mobile station automatically requests access parameters for the most recent WLAN from an access service unit 7. Thus, for example, in conjunction with a GPS satellite system 8, the actual position L is first detected by the position detector 15 of the mobile station 1. The location L is appended to the request rq to assist in accessing the service unit 7 to select the WLANs closest to the actual location L. This requirement is transmitted via the GPRS interface 14. The operator accessing the service unit may be a network operator of the GPRS network, or a WLAN operator, or other service provider.

This requirement rq can be transmitted in a periodic manner so that the lookup table 17 is updated as often as needed. The update frequency may depend on the motion value mv. The faster the mobile station 1 moves, the more the rq needs to be transmitted to the access service unit 7.

In one case, the access service unit 7 with the control unit 71 may transmit the access parameters of the WLANs 3, 4 and 5 to the mobile station 1 as the response rp after receiving the request rq. However, the mobile station may indicate in the request rq that the user is moving on a given path and may add a train number tn to the required rq. Based on the actual location L and the train number tn of the train, the access service unit 7 may only select WLAN 5 as a dedicated WLAN, which will cover the future location of the mobile station on its path. The response rp therefore only contains the access parameter ap of WLAN 5.

When the response rp is received, the lookup table 7 facilitates updating with the access parameters of the WLAN 5, and the access parameters of other WLANs that may be of interest on the past journey of the mobile station 1 may be eliminated from the lookup table 17.

According to Figure 2, the transport mechanism 2 is now close to the train station 6. When the interface 13 of the mobile station 1 periodically receives the actual motion value mv from the service unit, the access control unit 16 detects that the mobile station 1 is now in a stationary or near stationary state. This information causes the access control unit 16 to attempt to establish a link to the WLAN 5. However, before any access mechanism is initiated, the mobile station 1 determines the actual location L' via GPS and checks if the location L' matches the coverage of one of the WLANs stored on the lookup table 17.

In this example, location L' matches the coverage area of WLAN 5, which is the only WLAN that is currently stored in lookup table 17 in the lookup table. In short, depending on the actual motion value mv, and then on the actual location L', the WLAN according to lookup table 17 is selected to establish a link. Here, the WLAN access parameter ap is read from the lookup table 17 and used to establish a connection to the WLAN 5. In a simplified overview, the access requirements to WLAN 5 are denoted by ar, and the acknowledgments of the links are denoted by ack. Email information is indicated by email.

The following description of the pseudo-code program is preferably performed when the mobile station is in motion, and the user wants to establish a connection to the wireless local area network (in the following example, WLAN) Access their email:

UPDATE-THE-LOOK-UP-TABLE

WHILE(TRUE)

SLEEP-FOR-NSECONDS()

Location=GET-GPS()

Velocity=GET-VELOCITY()

Look-Up-Table=

GET-LOOK-UP-TABLE-WLAN (Location, Velocity)

It is worth noting that this sleep step is determined by speed. This "Velocity=GET-VELOCITY()" requires the car's internal computer to get the current speed. This "Location=GET-GPS()" requires a GPS receiver.

CHECK-WLAN-CONNECTIVITY

Location=GET-GPS()

IF IN-RANGE(Look-Up-Table, Location)

ControlInfo=Look-Up-Table.getControlAt(Location)

CONNECT-TO-WLAN (ControlInfo)

The above is only performed when the transport mechanism is, for example, at rest.

MAIN-LOOP

WHILE(TRUE)

Velocity=GET-VELOCITY()

IF Velocity=0

THEN IF CHECK-WLAN-CONNECTIVITY

GET-EMAILS

In addition to the loop, it is also preferred that the car informs the computer whenever the car is stationary.

The purpose of this fake code is to enhance the general understanding of this specific example. This fake code can be embodied in a computer program component of a mobile station. This mode of operation of the mobile station can be set by the user before starting the trip.

1. . . Mobile station

11. . . monitor

12. . . Access WLAN interface

13. . . Receive an interface of motion values

14. . . GPRS interface

15. . . Position detector

16. . . Access control unit

17. . . Query list

2. . . Transport agency

twenty one. . . Service unit

twenty two. . . interface

3. . . Wireless local area network

4. . . Wireless local area network

5. . . Wireless local area network

6. . . train station

7. . . Access service unit

71. . . control unit

8. . . GPS satellite system

The invention and its specific examples will be more fully understood from the following detailed description of the embodiments of the invention.

The diagram is as follows:

1 shows a first embodiment of a mobile station and a method of providing access to a wireless local area network in accordance with the present invention;

2 shows a second embodiment of a mobile station and a method of providing access to a wireless local area network in accordance with the present invention.

Different figures may contain the same reference, representing that the elements have similar or consistent content.

1. . . Mobile station

11. . . monitor

12. . . Access WLAN interface

13. . . Receive an interface of motion values

14. . . GPRS interface

15. . . Position detector

16. . . Access control unit

17. . . Query list

2. . . Transport agency

twenty one. . . Service unit

twenty two. . . interface

3. . . Wireless local area network

4. . . Wireless local area network

5. . . Wireless local area network

6. . . train station

7. . . Access service unit

71. . . control unit

8. . . GPS satellite system

Claims (5)

A method for providing information to a mobile station, comprising: performing, by an access service unit, a mobile station (1) detecting an actual location (L, L') of the mobile station (1); The mobile station (1) receives a request for one of the wireless local area network parameters, the request (rq) containing the actual location (L, L') of the mobile station (1); and the response request (rq), transmitting one or Access parameters (ap) of a plurality of wireless local area networks (3, 4, 5) to the mobile station (1), the access parameter (ac) containing the actual location (L) not covering the mobile station (1) , L'), but access parameters (ac) of the wireless local area network (3, 4, 5) in one of the adjacent areas. The method of claim 1, wherein the local area (3, 4, 5) in which the access parameter is to be transmitted is selected depending on the actual location (L, L') of the mobile station (1). . The method of claim 1 or 2, wherein the request (rq) and the response (rp) are one of different technologies of the technology that is directed to the wireless local area network to which the request is directed. Road to send. A computer program component comprising a computer readable program code for execution by a digital processing unit for performing the method of any one of claims 1 to 3. An access service unit comprising a control unit (71) designed to perform the steps of the method of any one of claims 1 to 3.