Abstract:
[Object] To improve communication of a communication node that utilizes a radio resource (frequency channel) under an environment in which there is an interference from communication involving a communication node that is not control target, with less calculation amount.[Solution] Provided is a communication control device including: an acquisition unit configured to acquire first interference information indicating a first interference from communication involving a communication node that is not control target and second interference information indicating a second interference from communication involving another communication node of control target, with respect to each of communication nodes of control target; and a classifying unit configured to classify the communication nodes into groups related to a decision of a radio resource that a communication node is able to utilize, on the basis of the first interference information and the second interference information with respect to the communication nodes.
Abstract:
There is provided a communication control device that controls wireless communication in compliance with a time division duplex (TDD) scheme, the communication control device including: a selection unit configured to select a link direction configuration for the wireless communication among a plurality of candidates for the link direction configuration which indicates a link direction in units of sub-frames of a radio frame which includes a plurality of sub-frames; and an application unit configured to apply the selected link direction configuration to the wireless communication. The plurality of candidates include at least one of a link direction configuration dedicated to a downlink and a link direction configuration dedicated to an uplink.
Abstract:
Provided is a communication control apparatus including: an information acquisition unit that acquires channel arrangement information for a first frequency channel on which an interference signal is transmitted and a second frequency channel on which a desired signal to be interfered from the interference signal is transmitted, the first frequency channel and the second frequency channel being a combination of frequency channels that can be partially overlapped with each other; and an interference control unit that determines overlapping on a frequency axis between the first frequency channel and the second frequency channel on the basis of the channel arrangement information, and calculates a protection ratio for protecting the second frequency channel from interference according to the determined overlapping.
Abstract:
There is provided a communication control apparatus including a parameter acquisition unit that acquires parameters to calculate coverage of secondary systems from a secondary usage node operating the secondary systems on a frequency channel allocated to a primary system, a calculation unit that calculates the coverage of the secondary systems using the parameters acquired by the parameter acquisition unit, and an interference control unit that notifies a detection node that detects neighboring secondary systems of the secondary systems, of coverage information representing the coverage of the secondary systems calculated by the calculation unit.
Abstract:
A wireless communication system, using wireless base stations, and other devices, such as a relay node, interoperate with using spectrum aggregation and MIMO. Traffic usage is detected and based on channel utilization relative to capacity, spectrum aggregation is chosen over MIMO under certain conditions. On the other hand, under higher channel utilization system components switch to MIMO modes of operation to reduce demand on channel use, while providing good throughput for communications stations.
Abstract:
A wireless communication system, using wireless base stations, and other devices, such as a relay node, interoperate with using spectrum aggregation and MIMO. Traffic usage is detected and based on channel utilization relative to capacity, spectrum aggregation is chosen over MIMO under certain conditions. On the other hand, under higher channel utilization system components switch to MIMO modes of operation to reduce demand on channel use, while providing good throughput for communications stations.
Abstract:
Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded.
Abstract:
[Object] To adaptively adjust a symbol interval in accordance with a communication environment. [Solution] An apparatus including: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information for adjusting a symbol interval in a complex symbol sequence into which a bit sequence is converted is transmitted from the communication unit to a terminal, the control information being set on a basis of a predetermined condition.
Abstract:
[Object] To be able to perform management involved with wireless communication without routing via a base station. [Solution] Provided is an apparatus including: a generation unit configured to generate information related to data wirelessly transmitted or received without being routed via a base station; and a control unit configured to control transmission of the information to a node which is not involved in the transmission or reception of the data.
Abstract:
Provided is a method for performing a handover from a first base station to a second base station by a user equipment that is performing a radio communication over a communication channel formed by aggregating a plurality of component carriers. The method includes a step of transmitting a handover command for a component carrier for which a handover has been approved by the second base station among the plurality of component carriers from the first base station to the user equipment and a step of trying to make an access from the user equipment to the second base station for each component carrier in response to the handover command.