Ricoh Company, Ltd.

Linju Yang

Wei Wang

Bin Da

Haihua Yu

Ke Liao

Yan Sun

Tian Ji Yang

Yi Sun

Chaofeng Li

Yindong Zhang

Xiaomei Lu

A load balancing method, an access controller and a load balancing system are provided. The method includes receiving load status association information from a plurality of APs in a wireless local area network, respectively, the load status association information including load information and connectivity information, and the connectivity information being information for indicating one or more UEs that can be connected to an AP corresponding to the load status association information; determining, based on the load status association information, load statuses of the APs, and obtaining, using the load status association information, a load balancing connection scheme for balancing loads of the APs, when the load statuses satisfy a predetermined condition; and determining, based on the load balancing connection scheme, a correspondence relation between a specific UE and one of the plurality of APs to connect a UE and a corresponding AP.

Load balancing system with an access controller in the field of communication technology

An area restricted access system, method, and non-transitory computer-readable storage medium are provided. The system includes an access device and a first service device located in a service area, wherein the access device locates a user device via a first type of wireless signals and obtains a first location parameter. The first service device monitors and locates the user device via a second type of wireless signals and obtains a second location parameter. The area restricted access system generates a modified location parameter based on the first and the second location parameters and determines whether the user device is within or out of the service area based on the modified location parameter. The first service device allows the user device to access the first service device when the user device is within the service area, and forbids the user device to access the first service device when the user device is out of the service area.

Area restricted access system, method and non-transitory computer-readable storage medium

Disclosed is a method of estimating the distance between two nodes. The method includes obtaining an original real-time strength sequence, its elements being strengths of signals between the two nodes at respective time slots of a first time period; conducting multi-scale transform with respect to the original real-time strength sequence so as to acquire plural real-time strength component sequences which are results of the original real-time strength sequence projected onto plural scales; removing at least one burst noise element in each real-time strength component sequence so as to get plural updated real-time strength component sequences; estimating, based on the plural updated real-time strength component sequences and a multi-scale empirical mapping relationship, an empirical real-time distance, the multi-scale empirical mapping relationship being used for expressing correspondence relations between strength components and distance components; and determining, based on at least the empirical real-time distance, a real-time distance between the two nodes.

Distance estimation method and device as well as node localization method and apparatus

Disclosed is an access control method of an area restricted network system including a central control device and at least one area restricted network. Each area restricted network includes at least a master node. The method comprises a detection step of detecting that an access device has entered into an area restricted network in the area restricted network system; a receipt step of receiving, by a master node in the area restricted network, an authentication information request sent by the access device; a sending step of, in response to the authentication information request, generating and sending the authentication information for the access device by the master node in the area restricted network; and a request step of, by the access device, receiving the authentication information, and then utilizing the authentication information so as to send an authentication request to the central control device.

Access control method, authentication method, and authentication device

Disclosed is a channel power adjustment method and system based on positional information of plural self-organizing subnets in a restricted area. The method includes a first setting step of setting, based on the positional information of the plural self-organizing subnets, a positional priority for each of the plural self-organizing subnets; and a first adjustment step of adjusting, at least partially based on the positional priorities of the plural self-organizing subnets, a power of a first device in a first self-organizing subnet working in a first channel, satisfying a predetermined rule to a first power of the first channel.

Channel power adjustment based on positional information of area restricted self-organizing subnets

Disclosed are a wireless network area limiting method and a wireless network area limiting system based on NFC. The wireless network area limiting method includes a step of adopting a plurality of first NFC hot spot sensors to seamlessly define a limited area having any shape; a step of periodically generating and transmitting an area secret key by a first central control part respectively connected to the plurality of first NFC hot spot sensors; and a step of conducting handshake with the first central control part by a WLAN user equipment, which has a NFC function and is located in the limited area, based on the area secret key received by the WLAN user equipment, so that the first central control part establishes area-limited network communications in the limited area.

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Beijing, China

Linju Yang