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

Patent metadata

Field	Value
Publication number	US-9420520-B2
Application number	US-28028706-A
Country	US
Kind code	B2
Filing date	May 30, 2006
Priority date	Feb 21, 2006
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

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.

First claim

The invention claimed is:

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 loc

Assignees

• Bäckström Martin
• Larsson Anders
• Walldeen Thomas
• ERICSSON TELEFON AB L M (publ)

Inventors

• Bäckström Martin
• Larsson Anders
• Walldeen Thomas

Classifications

• H04L12/1845

  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 title

• H04W48/04 Primary

  based on user or terminal location or mobility data, e.g. moving direction, speed · CPC title

• H04W4/02

  Services making use of location information · CPC title

• H04W60/06

  De-registration or detaching · CPC title

• H04W48/20

  Selecting an access point · CPC title