Abstract: Provided is a method of reducing power consumption of a base station. A method of operating a base station with low power consumption in a mobile communication system includes: reporting status information about a level of traffic being served by a base station in an active mode to an apparatus for managing power consumption of the base station; and switching from the active mode to an inactive mode in response to a mode change command from the apparatus.

Abstract: A technology for inter-cell interference control is provided. In one general aspect, the inter-cell interference may be controlled by resource allocation scheduling or power management. A cell may be divided into a plurality of regions. A constant available resource band and a selectively available band are allocated to each region. Each of the allocated resource bands is assigned with an interference characteristic. The resource allocation scheduling and the power management are performed according to the resources allocated to the respective regions and the interference characteristics assigned to the respective resources.

Abstract: Disclosed are an apparatus and a method for managing radio resources, capable of effectively managing radio resources. When a normal call and a handover call are attempted, radio resources are allocated and it is determined whether or not to perform an overload control based on received load related information and then it is determined whether or not to admit the call depending on an availability of a bandwidth for radio resources, a priority of real time traffic or a locking probability of data. The quality and efficiency of a mobile communication service is enhanced by pertaining an effective allocation on radio resources and controlling the load of radio resources in the mobile communication system. The radio resource managing apparatus and method using the same are applied to IMT (International Mobile Telecommunications)-Advanced system base station, thereby optimizing the efficiency of radio resources.

Abstract: A method and apparatus for controlling interference between cells for non-real time data transfer in a mobile communication network is provided. The method of controlling interference between cells in a mobile communication system including a plurality of cells includes: dividing each cell into at least one segment based on density of terminals within each cell and distance from the center of each cell; allocating rise over thermal (RoT) with respect to each segment based on the distance from the center of each cell, an attenuation ratio according to the distance, and a shadowing factor; and providing data services to terminals within each segment according to the allocated RoT. Accordingly, it is possible to improve system throughput.

Abstract: In a QoS information controller and method, the QoS information controller is used in a multi-cell environment to determine the traffic characteristic, the mobile communication system characteristic, the traffic processing capacity, and the radio resource, and to control the QoS information. In addition, a QoS requested by a user may be achieved since the traffic characteristic, the mobile communication system characteristic, the traffic processing capacity, and the radio resource are determined and the QoS information is controlled to efficiently process the QoS information for the multimedia traffic in the multi-cell environment.

Abstract: A handover method and apparatus for a mobile terminal using location information in a network of heterogeneous systems are provided. The handover method uses service area map information provided by a location service server in a mobile communication network in which at least one or more heterogeneous wireless network systems are connected through a predetermined network and, includes: receiving service area map information transmitted from the location service server; the mobile terminal determining whether or not the location of the mobile terminal is within the service area map; and if it is determined that the mobile terminal is within the service area map, the wireless terminal selecting an accessible wireless network system and then activating a unit for communicating with a base station of the selected wireless network system.

Abstract: The present invention is a method of controlling call setup, which accepts a request for setting a call when a first ratio of free resource blocks for uplink during a first monitoring unit time just before receiving the request is more than or equal to a first call acceptance threshold for uplink and a second ratio of free resource blocks for downlink during the first monitoring unit time is more than or equal to a second call acceptance threshold for downlink. When the first ratio is less than the first call acceptance threshold or the second ratio is less than the second call acceptance threshold, the call is queued for a queuing unit time. The call is accepted when a ratio of free resource blocks for uplink during a second monitoring unit time just before terminating the queuing unit time is more than or equal to the first call acceptance threshold and a ratio of free resource blocks for downlink during the second monitoring unit time is more than or equal to the second call acceptance threshold.

Abstract: The present invention relates to a service mode switching method based on a software communication architecture (SCA) of a reconfigurable base station system. In an exemplary embodiment of the present invention, first and second service mode software component files are stored and managed by separating the first and second service mode software component files into a common component file used for first and second modes in common and first and second mode individual component files individually used for the first and second modes. When the first mode is established according to an applied request, the first mode individual component file is operated, and the base station in the first mode is operated. When the second mode is established according to another applied request, the operation of the first mode individual component file is stopped.

Abstract: Provided is a method of causing a mobile terminal to access an optimal access network using an access gateway. By searching for neighboring access network nodes periodically to select an optimal access network node when the mobile terminal accesses a serving access network node or when the mobile terminal performs handover, and accessing the selected optimal access network node through the access gateway to communicate with the optimal access network, it is possible to reduce communication costs and provide high-quality communication services to users without installing any additional apparatus require for heterogeneous networking. Furthermore, by performing authentication, registration, and QoS control in advance before accessing the optimal access network node, it is possible to reduce a time consumed to access the optimal access network node.

Abstract: There is provided a method for deciding a transmission priority of non-realtime data, the method including: receiving a user requested data transfer rate; confirming an average data transfer rate allocated previously to a user terminal; and deciding a transmission priority using the received user requested data transfer rate and the previously allocated average data transfer rate.

Abstract: The present invention relates to a method of transmitting data in a handover between base stations. When a mobile terminal performs a handover between base stations in a wireless communication system, a gateway transmits data traffic to be transmitted to a mobile terminal by using an IGMP (Internet Group Management Protocol) to a serving base station being serviced to the mobile terminal and a target base station to which a handover of the mobile terminal is made in a bi-casting method. Accordingly, when the mobile terminal performs the handover between the base stations, the gateway transmits the data traffic in the bi-casting method. As a result, it is possible to efficiently use a resource of a user plane connection interval between the gateway and the base station, thereby minimizing the loss of data traffic transmitted in a downlink, that is, data.

Abstract: Provided is a method for managing a cross-layer handover. The method includes the steps of: managing a predetermined number of neighbor cells as a handover candidate set based on signal strength and route estimation; transmitting a Measurement Report message having the handover candidate set information to a source base station according to a reporting event; and performing a handover according to a Handover Command message received from the source base station.

Abstract: An apparatus and method for managing QoS in an integrated network system are provided. The apparatus includes: an information provider for providing policy information based on a network equipment control algorithm, a user profile and network information; a condition calculator for calculating conditions that are used for selecting a policy based on the user profile and the network information received from the information provider; a policy deciding unit for deciding a network equipment control algorithm according to the conditions, receiving the policy information corresponding to the decided network equipment control algorithm from the information provider, and requesting resource allocation; and a resource allocator for receiving the request of resource allocation from the policy deciding unit and allocating resources.

Abstract: Provided is a method for allocating an Internet protocol (IP) address to a mobile station in a mobile communication system. The method includes the steps of: a) receiving an “Activate Packet Data Protocol (PDP) request” message including router solicitation from the mobile station; b) acquiring a global IP address of the mobile station by performing the router solicitation and a router advertisement procedure instead of the mobile station; and c) loading the acquired global IP address in an “Activate PDP context Accept” message and transferring the “Activate PDP context Accept” message to the mobile station.

Abstract: The present invention relates to a system and method for transmitting interworking information of a mobile communication system and a broadband wireless access system. In the method, a cell broadcasting service message or system information including interworking information of the broadband wireless access system is received, and a communication connection between a mobile terminal and the broadband wireless access system is established based on the cell broadcasting service message or the system information. In addition, an interworking system of the mobile communication system and the broadband wireless access system transmits, by using a cell broadcasting service or system information broadcasted by the mobile communication system, broadband wireless access system information to a mobile terminal used in the two systems.

Abstract: The present invention relates to a QoS information controller in a multi-cell environment and a method thereof. According to an exemplary embodiment of the present invention, the QoS information controller is used in the multi-cell environment to determine the traffic characteristic, the mobile communication system characteristic, the traffic processing capacity, and the radio resource, and to control the QoS information. In addition, a QoS requested by a user may be achieved since the traffic characteristic, the mobile communication system characteristic, the traffic processing capacity, and the radio resource are determined and the QoS information is controlled to efficiently process the QoS information for the multimedia traffic in the multi-cell environment.

Abstract: The present invention relates to a bandwidth allocation apparatus and a method thereof. The present invention provides a method for adaptively allocating and controlling radio channels to multimedia traffic having various characteristics. Particularly, the present invention proposes a method for maximizing a system resource use rate while satisfying a communication QoS requirement for individual video traffic. Therefore, the adaptive bandwidth allocation method according to the present invention guarantees system performance and user-required communication QoS.

Abstract: The present invention relates to a vertical handoff method. According to the present invention, a serving network of a mobile station is determined. Herein, the mobile station that can access a first network having relatively wide service coverage and a second network having relatively narrow service coverage in an area where service coverages of heterogeneous networks are overlapped. When accessing the serving network of the first network, it is determined whether a received signal strength received from the second network is greater than a first threshold value. In addition, a first vertical handoff is decided by using a result of prediction of a transition pattern of the received signal strength that is greater than the first threshold value. When the serving network is the second network, it is determined whether the received signal strength received from the second network is less than a second threshold value.

Abstract: In a wireless network discovery method according to an exemplary embodiment of the present invention, a) a propagation environment information message generated by using signal information received from the heterogeneous wireless networks is transmitted to the common core network, b) a wireless network discovery range generated by using the propagation environment information message is received from the common core network, c) it is determined if signal information received from a serving wireless network at a current location corresponds to the wireless network discovery range, and d) when the signal information corresponds to the wireless network discovery range in c), a network within the wireless network discovery range is discovered, when the signal information does not correspond to the wireless network discovery range in c), c) is periodically performed.

Abstract: The present invention relates to a device for providing a quality of service (QoS) of a hand-off between heterogeneous networks, and a method thereof. According to the present invention, the device includes a device for performing a QoS management function for each access system and a device for performing a QoS management function between heterogeneous access systems in a network including a plurality of interlocked access systems. The device for performing the QoS management function for each access system manages a user service session, a local QoS of the access system, and a QoS context of the service session. The device for performing the QoS management function between the heterogeneous access systems negotiates the QoS of the service session and manages the QoS context when the hand-off is performed between the heterogeneous access systems, and performs a QoS mapping operation.