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. By using a result of prediction of a transition pattern of the received signal strength that is less than the second threshold value, a second vertical handoff is decided. Herein, the first threshold value is greater than the second threshold value.
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:
Provided is a method of admission control for a hybrid femtocell in a wireless communication system, in which the method is applied to a wireless communication system including a hybrid femto base station and a core network performing admission control of a mobile station terminal in a femtocell of the hybrid femto base station. The method of admission control for a hybrid femtocell performed by a core network according to an exemplary embodiment of the present invention includes determining whether a mobile station terminal has membership; determining whether speed information of the mobile station terminal exists; and assigning a probability value to the mobile station terminal depending on the membership and the speed information of the mobile station terminal.
Abstract:
A feedback generation method for uplink Transmit Power Control (TPC) in a mobile communication system is provided. A feedback generation system for uplink TPC includes an uplink information receiver to receive uplink information from a terminal, to measure a Signal-to-Interference Noise Ratio (SINR) value with respect to the received uplink information, and to measure a movement speed of the terminal, a transmission power adjustment value setting unit to set a transmission power adjustment value based on the movement speed of the terminal; an adjusted SINR calculator to calculate an adjusted SINR value, based on an expected SINR value and the measured SINR value; and a feedback information regenerator to regenerate feedback information based on the transmission power adjustment value and the adjusted SINR value, and to transmit the regenerated feedback information to the terminal.
Abstract:
Disclosed is a mobility management method for use in a cellular mobile communication system. The mobility management method is configured to save radio resources and provide a stable service by detecting a cell in which a dwell time of user equipment (UE) is short as an island cell and performing a direct handover (HO) to an appropriate cell without handing over the UE to the island cell. There are provided three methods including a base station-based method, a UE measurement-based method, and a UE history-based method according to how to measure a dwell time in which the UE stays in a cell, a component in which obtained information is received within a network, and how to process an HO using the information.
Abstract:
There are provided a control channel managing apparatus of a base station, a control channel searching apparatus of a user equipment (UE) and a control channel allocating method in a mobile communication system. When an aggregation level is high and a plurality of UEs having the same starting address of a control channel search space are scheduled in a corresponding subframe, control information with respect to conflicting UEs which have lower priorities in terms of allocation of control information can be transmitted through the conflicting UE space. Hence, more control information can be transmitted and the number of available UEs corresponding to the control information increases, and thus an improvement in the performance of the entire network can be achieved.
Abstract:
When a call is attempted from a terminal that can transmit/receive data by connecting to different plurality of networks, a radio routing agent that is positioned at a core network selects an optimum wireless route from a plurality of wireless routes and provides the optimum wireless route based on an entire radio resource and a route state. Therefore, when a normal response is received by attempting a call to a call receiving terminal through the optimum wireless route that is selected by the radio routing agent, a call processing apparatus transmits the optimum wireless route to a terminal in which a call is attempted through a base station.
Abstract:
An apparatus and method for managing QoS in an integrated network system are provided. The apparatus includes: an information provider, a condition calculator, a policy deciding unit, and a resource allocator. The information provider is for providing policy information based on a network equipment control algorithm, a user profile and network information. The condition calculator is for calculating conditions that are used for selecting a policy based on the user profile and the network information received from the information provider. The policy deciding unit is for deciding a network equipment control algorithm in accordance with the conditions, receiving the policy information corresponding to the decided network equipment control algorithm from the information provider, and requesting resource allocation. The resource allocator is for receiving the request of resource allocation from the policy deciding unit and allocating resources.
Abstract:
Provided are a resource allocation mapping apparatus and method for transmitting CSRS, the resource allocation mapping method includes calculating subcarrier indexes to allocate same subcarrier index to base stations that have same remainder when a base-station index, which classifies the base stations, is divided by a constant; and mapping a resource allocation of the CSRS for the each base station using the calculated subcarrier indexes.
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.