Method and apparatus for providing access for a limited set of mobile stations to a restricted local access point

• US 9,420,520 B2
• Filed: 05/30/2006
• Issued: 08/16/2016
• Est. Priority Date: 02/21/2006
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Bckstrm, Martin, Larsson, Anders, Walldeen, Thomas
• Primary Examiner(s): Zele, Krista
• Assistant Examiner(s): FABBRI, ANTHONY E
• Application Number:
  US12/280,287
• Publication Number:
  US 20100228859A1
• Time in Patent Office: 3,731 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 12/1845 broadcast or multicast in a specific location, e.g. geocast protocols for adapting network applications to user terminal location H04L67/52; services specially adapted for wireless communication networks making use of the location of users or terminals H04W4/02
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 48/04 based on user or terminal location or mobility data, e.g. moving direction, speed
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 60/06 De-registration or detaching

Abstract

The invention concerns methods, a device and computer program products for simplifying handover back to a restricted local access point from an unrestricted global access point as well as to a device implementing a restricted local access point for provision in a wireless network and a wireless network. In the network a restricted local access point hands over a mobile station to an unrestricted global access point and provides data enabling the restricted local access point to be identified as a candidate access point. A device for simplifying handover back determines that the restricted local access point is a candidate for further handover based on this data and informs the mobile station about the restricted local access point via the unrestricted glob access point. Thereby hand over may be considered also to the restricted local access point in addition to other surrounding access points.

Claims

1. Method of providing access for a limited registered set of mobile stations to a restricted local access point in a wireless network, comprising the steps of:

attracting mobile stations in an area covered by the restricted local access point, for each mobile station that is attracted;

determining, by the restricted local access point, whether the mobile station belongs to the limited registered set,

based on the determination that the mobile station belongs to the limited registered set, allowing the mobile station access to the restricted local access point, and

based on the determination that the mobile station does not belong to the limited registered set, rejecting access for the mobile station to the restricted local access point;

wherein the step of attracting comprises sending by the restricted local access point a minimum link quality value level to all mobile stations in the covered area, where a link quality value that is determined for the restricted local access point by one of the mobile stations has to exceed the minimum link quality value level for the one mobile station to be attracted; and

,

wherein the step of attracting further comprises sending by the restricted local access point, to all mobile stations in the covered area, a network identity associated with the restricted local access point and other restricted local access points in the wireless network, wherein the network identity is different than a second identity of unrestricted global access points in the wireless network.

2. Method according to claim 1, wherein the step of attracting comprises sending an offset to all mobile stations in the covered area, where the offset is added to a link quality value determined for the restricted local access point by a mobile station when comparing link quality values of different access points in the network and the link quality value with added offset has to be higher than or equal to link quality values of other access points for the mobile station to be attracted.

3. Method according to claim 1, wherein the step of determining whether the mobile station belongs to the set comprises receiving an identifier of the mobile station, comparing the identifier with identifiers associated with mobile stations of the set and performing the steps of allowing or rejecting access in dependence of the result of the test.

4. Method according to claim 3, wherein the network is divided into different sectors, the local restricted access point is associated with another sector from that of neighbouring access points of the network, and the step of attracting comprises informing all mobile stations in the covered area of this sector and the step of rejecting comprises disallowing roaming into the sector.

5. Method according to claim 4, wherein there is more than one restricted local access point in the network, each being associated with a separate sector.

6. Method according to claim 5, wherein the mobile stations of the set may only access the sector of a corresponding restricted local access point.

7. Method according to claim 4, wherein there is more than one restricted local access point in the network, all being associated with the same sector.

8. Method according to claim 7, wherein all mobile stations of the set may access any restricted local access point of the sector.

9. Method according to claim 1, further comprising the step of receiving, at the restricted local access point, mobile station identifying information from the user of the access point and sending said information to a service device of the wireless network.

10. Method according to claim 1, further comprising steps of:

receiving input from a user at the restricted local access point;

in response to receiving the input, initiating a registration procedure at the restricted local access point;

detecting that a mobile station has been turned on in the covered area while the registration procedure is underway by receiving an International Mobile Subscriber Identity (IMSI) attach request from the mobile station; and

,

in response to detecting that the mobile station has been turned on while the registration procedure is underway, registering the mobile station in the limited registered set.

11. Method according to claim 10, wherein receiving input from the user comprises detecting the user has pressed a button associated with the restricted local access point.

12. Method according to claim 11, further comprising detecting that the mobile station has been turned on while the registration procedure is underway by detecting that the mobile station has been turned on while the user is pressing the button.

13. Method according to claim 10, further comprising detecting that a mobile station has been turned on in the area while the registration procedure is underway comprises detecting that only one mobile station has been turned on in the area while the registration procedure is underway and further comprising:

detecting that more than one mobile station has been turned on in the area while the registration procedure is underway; and

in response to detecting that more than one mobile station has been turned on in the area while the registration procedure is underway, declining to register any of the mobile devices turned on while the registration is underway.

14. Method according to claim 13, wherein declining to register any of the mobile stations turned on while the registration is underway comprises sending an indication to the mobile stations to try registration again.

15. Control device for a restricted local access point for provision in a wireless network, said restricted local access point being implemented by a device comprising:

a radio communication unit, and,

said control device being arranged to;

order the radio communication unit to attract mobile stations in an area covered by the restricted local access point, and

for each mobile station that is attracted;

determine whether the mobile station belongs to a limited registered set of mobile stations,

based on the determination that the mobile station belongs to the limited registered set of mobile stations, allow the mobile station access to the restricted local access point, and

based on the determination that the mobile station does not belong to the limited registered set of mobile stations, reject access for the mobile station to the restricted local access point;

wherein the control device is further arranged to provide the radio communication unit with a minimum link quality value level to be sent all mobile stations in the covered area for attracting them, where a link quality value that is determined for the restricted local access point by one of the mobile stations has to exceed the minimum link quality value level for the one mobile station to be attracted; and

,

wherein the control device further arranged to attract mobile stations by providing the radio communication unit with a network identity to be sent to all mobile stations in the covered area, wherein the network identity is associated with the restricted local access point and other restricted local access points in the wireless network, and wherein the network identity is different than a second identity of unrestricted global access points in the wireless network.

16. Control device according to claim 15, being further arranged to provide the radio communication unit with an offset to be to be sent all mobile stations in the covered area for attracting them, where the offset is added to a link quality value determined for the restricted local access point by a mobile station when comparing link quality values of different access points in the network and the link quality value with added offset has to be higher than or equal to link quality values of other access points for the mobile station to be attracted.

17. Control device according to claim 15, which when being arranged to determine whether the station belongs to the set is further arranged to receive an identifier of the mobile station, compare the identifier with identifiers associated with mobile stations of the set and allow or reject access in dependence of the result of the test.

18. Control device according to claim 17, wherein the network is divided into different sectors, the local restricted access point is associated with another sector than neighbouring access points of the network and the control device being further arranged to ordered the radio communication unit to inform all mobile stations in the covered area of this sector and when performing rejection is arranged to disallow roaming into the sector.

19. Control device according to claim 18, wherein there is more than one restricted local access point in the network, each being associated with a separate sector.

20. Control device according to claim 19, wherein the mobile stations of the set may only access the sector of the restricted local access point.

21. Control device according to claim 18, where there is more than one restricted local access point in the network, all being associated with the same sector.

22. Control device according to claim 21, wherein all mobile stations of the set may access any restricted local access point of the sector.

23. Control device according to claim 15 wherein at least a part of the control device is provided in association with a traffic control unit provided in the network.

24. Control device according to claim 15, wherein at least a part of the control device is provided as a control unit in the device implementing the restricted local access point.

25. Control device according to claim 15, wherein said control device being further arranged to:

receive an input from a user at the restricted local access point;

in response to receiving the input, initiate a registration procedure at the restricted local access point;

detect that a mobile station has been turned on in the covered area while the registration procedure is underway by receiving an International Mobile Subscriber Identity (IMSI) attach request from the mobile station; and

,

in response to detecting that the mobile station has been turned on while the registration procedure is underway, register the mobile station in the limited registered set.

26. Wireless network comprising:

a number of unrestricted global access points, and

at least one device implementing a restricted local access point that comprises;

a radio communication unit, and

a control device for the restricted local access point being arranged to;

attract mobile stations in an area covered by the restricted local access point,

for each mobile station that is attracted;

determine whether the mobile station belongs to a limited registered set of mobile stations,

based on the determination that the mobile station belongs to the limited registered set of mobile stations, allow the mobile station access to the restricted local access point, and

based on the determination that the mobile station does not belong to the limited registered set of mobile stations, reject access for the mobile station to the restricted local access point;

wherein the control device is further arranged to provide the radio communication unit with a minimum link quality value level to be sent all mobile stations in the covered area for attracting them, where a link quality value that is determined for the restricted local access point by one of the mobile stations has to exceed the minimum link quality value level for the one mobile station to be attracted; and

,

wherein the control device is further arranged to attract mobile stations by providing the radio communication unit with a network identity to be sent to all mobile stations in the covered area, wherein the network identity is associated with the restricted local access point and other restricted local access points in the wireless network, and wherein the network identity is different than a second identity of unrestricted global access points in the wireless network.

27. A restricted local access point in a wireless network for providing wireless service in a covered area to a limited registered set of mobile stations, the restricted local access point comprising:

a radio communication unit, and

a control device configured to;

attract mobile stations by broadcasting to all mobile stations in the covered area at least the following;

(1) a minimum link quality value level, where a link quality value that is determined for the restricted local access point by one of the mobile stations has to exceed the minimum link quality value level for the one mobile station to be attracted; and

(2) a network identity associated with the restricted local access point and other restricted local access points within the wireless network, wherein the network identity is different than a second identity of unrestricted global access points in the wireless network;

receive a location update from an attracted mobile station, wherein the location update comprises an identifier of the attracted mobile station;

forward the location update received from attracted mobile station to a traffic control unit in the wireless network; and

,

receive a message from the traffic control unit, wherein the message indicates one of following;

(1) the attracted mobile station is allowed to access the restricted local access point;

or (2) the attracted mobile station is not allowed to access the restricted local access point.

28. The restricted local access point of claim 27, wherein the attracted mobile station has determined that a measure link quality value for the restricted local access point exceeds the minimum link quality value level.