Mobile intelligent roaming using multi-modal access point devices
First Claim
1. A system comprising:
- a plurality of wireless local area network access points configured to provide wireless communication in a first wireless network with wireless client devices including dual-mode wireless client devices that are configured to communicate with the first wireless local area network and with at least one other network; and
a central controller configured to communicate with the access points, wherein the central controller is configured to receive information defining a coverage domain that is associated with the plurality of access points, information related to locations of at least one handover point where a dual-mode wireless client device may roam between the first wireless local area network and the other network during a communication session, and information about locations of the plurality of access points, wherein the central controller is configured to assign a plurality of different types of measurement and reporting roles to the plurality of access points based on their radio frequency locations with respect to the handover points, the access points which are assigned different types of measurement and reporting roles providing information that is utilized by the central controller to determine a location of at least one wireless client device in relation to a handover point, and at least one access point assigned one type of measurement and reporting role that provides information at a greater frequency than at least one other access point that provides information based upon another assigned type of measurement and reporting role.
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Accused Products
Abstract
A system and method are provided in which access point (AP) devices in a wireless local area network (WLAN) are typed or configured into one of three measurement and reporting roles: Monitor-Mode AP (MMAP), Portal AP (PAP), a Border AP (BAP) or an Interior AP (IAP). APs are assigned specific link measurement requirements according to their assigned type or role. In general, MMAPs and PAPs have the greatest measurement and reporting responsibilities, BAPs have less measurement and reporting responsibilities than PAPs and IAPs have the least measurement and reporting responsibilities. The APs generate measurements that are supplied to appropriate equipment to facilitate handover decisions with respect to a dual-mode wireless client device that roams between the WLAN and another network or vice versa. As a result, link measurements are only performed by APs in locations where such measurements are necessary for handover service, thus reducing the overall processing load on the WLAN infrastructure.
90 Citations
33 Claims
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1. A system comprising:
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a plurality of wireless local area network access points configured to provide wireless communication in a first wireless network with wireless client devices including dual-mode wireless client devices that are configured to communicate with the first wireless local area network and with at least one other network; and a central controller configured to communicate with the access points, wherein the central controller is configured to receive information defining a coverage domain that is associated with the plurality of access points, information related to locations of at least one handover point where a dual-mode wireless client device may roam between the first wireless local area network and the other network during a communication session, and information about locations of the plurality of access points, wherein the central controller is configured to assign a plurality of different types of measurement and reporting roles to the plurality of access points based on their radio frequency locations with respect to the handover points, the access points which are assigned different types of measurement and reporting roles providing information that is utilized by the central controller to determine a location of at least one wireless client device in relation to a handover point, and at least one access point assigned one type of measurement and reporting role that provides information at a greater frequency than at least one other access point that provides information based upon another assigned type of measurement and reporting role. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method comprising:
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at a plurality of wireless local area network access points that are part of a first wireless local area network; receiving signals from dual-mode wireless client devices that are configured to communicate with the first wireless local area network and at least one other network; and measuring characteristics of signals received from dual-mode wireless client devices according to different types of measurement and reporting roles assigned based on access point location relative to at least one handover point in a coverage area of the first wireless local area network where dual-mode wireless client devices may roam to the other network; at a controller; receiving measurement reports from the plurality of access points assigned different types of measurement and reporting roles, wherein at least one access point assigned one type of measurement and reporting role provides information at a greater frequency than at least one other access point that provides information based upon another assigned type of measurement and reporting role; and analyzing data in the measurement reports to determine whether to generate a handover trigger to enable a dual-mode wireless client device to roam between the first wireless local area network and the other network. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A system comprising:
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a plurality of wireless local area network access points configured to provide wireless communication in a first wireless network with wireless client devices including dual-mode wireless client devices that are configured to communicate with the first wireless local area network and with at least one other network, wherein each of the plurality of access points is configured according to one of several different types of measurement and reporting roles to make measurements of signals associated with dual-mode wireless client devices based on RF locations of each access point with respect to at least one handover point where a dual-mode wireless client device may roam between the first wireless local network and the other network; and a controller configured to communicate with the access points, wherein the controller is configured to receive and analyze data received from the plurality of access points having different types of measurement and reporting roles in order to determine when to generate a handover trigger for the communication session of the dual-mode wireless client device, wherein at least one access point having one type of measurement and reporting role providing information at a greater frequency than at least one other access point that provides information based upon another type of measurement and reporting role. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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Specification