摘要:
A reception unit receives data from communication apparatuses. A transmission unit transmits data to the communication apparatuses. A control unit determines, in an adaptive way, which modulation and coding schemes to use to transmit and receive data. At a first stage, a modulation and coding scheme with a low transmission rate or a modulation and coding scheme that minimizes power requirements is selected from among a plurality of candidates therefor. At a second stage, the modulation and coding scheme of at least one of the communication apparatuses is changed to another scheme having a higher transmission rate, when it is impossible to allocate sufficient resources for the modulation and coding schemes selected at the first stage.
摘要:
A communication system includes a transmitter that transmits a data flow through a single link or a parallel links, and a receiver that receives packets of the data flow, when the data flow of the received packets is transmitted through the parallel links, the received packets are aligned in order and output, and when the data flow of the received packets is transmitted through the single link, the received packets are output in a received sequence.
摘要:
A radio communication system for preventing transmission and receiving data from colliding with each other in radio relay communication. The radio communication system includes a plurality of radio base stations each having a scheduler for arranging a schedule of assignment of a slot into which data is to be inserted in a radio frame, a terminal for performing communication with at least one of the radio base stations through a connection, and a relay station for performing relay forwarding of the radio frame exchanged through the connection, the relay station including a scheduler control section for giving an instruction of the schedule to the scheduler. The scheduler control section gives the instruction to the scheduler so as not to generate duplicate slot assignment, in which the whole or a part of data is assigned to the same slot in radio frames sent at the same timing.
摘要:
An IP connection processing device and, more particularly, an IP connection processing device that, upon completion of user authentication, initiates a connection to an IP network in a designated area constructed by a wireless LAN or the like. The IP connection processing device, which processes the connection to the IP network that requires user authentication for connection to the network, includes components for: detecting authentication completion; acquiring an authentication result; and initiating or resuming the IP connection processing upon detection of the authentication completion. The IP connection processing device, upon detection of the authentication completion, requests IP address information from the IP network, and acquires an IP address of its own based on the information returned by the IP network.
摘要:
A monitoring unit monitors a quality of a radio channel established between a master station and a terminal device. An identification unit identifies attribute information representing an attribute of the terminal device or an attribute of a connection designated in a communication between the master station and the terminal device. On the basis of both a result of monitoring the quality of the radio channel by the monitoring unit and a result of identifying the attribute information by the identification unit, a control unit determines a reporting cycle in which management information is cyclically reported to a communication partner in order to manage the quality of the radio channel.
摘要:
A QoS setup method comprises the steps of a mobile node MN recognizing a first QoS setup request when an opposite correspondent node CN makes the first QoS setup request for its route to the home address HoA of the mobile node MN, the mobile node MN making a second QoS setup request, and establishing the second QoS setup for a route between the home address HoA and Care-of Address CoA of the mobile node MN. This method makes it possible to carry out QoS setup for a section to a moved-to place of a mobile node MN in response to a QoS setup request from an opposite correspondent node CN, even if the correspondent node CN and mobile node do not have a function of route optimization.
摘要:
The present invention provides a mobile communication network system comprising a first mobile communication network having a plurality of routers, a second mobile communication network having a plurality of routers, and a mobile communication terminal. A router located in an end section of a communication area of the first mobile communication network sends an end message indicating that it is located in the end section, to the mobile communication terminal. The terminal initiates communications with a router of the second mobile communication network, whilst the terminal is communicating with the router located in the end section, upon receiving the end message sent by the router located in the end section.
摘要:
In a communication system a base station maps paging information the destinations of which are a plurality of mobile stations to a specific frame of frames and transmits the specific frame to a relay station. The relay station for relaying communication between the base station and the plurality of mobile stations receives the specific frame, maps the paging information the destination of which are the plurality of mobile stations and which is mapped to the specific frame, to the remaining frames of the frames on the basis of a determined rule, and transmits the remaining frames to the plurality of mobile stations. When the plurality of mobile stations are under the control of the relay station, the plurality of mobile stations receive the remaining frames and acquire the paging information on the basis of the determined rule.
摘要:
A method for allocating uplink radio resources to a radio communication device includes transmitting a polling signal; allocating radio resources for data transmission based on a response signal to the polling signal; suspending transmission of the polling signal when it is determined that a condition to omit the transmission of the polling signal is satisfied; and allocating radio resources for data transmission while the transmission of the polling signal is suspended.
摘要:
A reception unit receives data from communication apparatuses. A transmission unit transmits data to the communication apparatuses. A control unit determines, in an adaptive way, which modulation and coding schemes to use to transmit and receive data. At a first stage, a modulation and coding scheme with a low transmission rate or a modulation and coding scheme that minimizes power requirements is selected from among a plurality of candidates therefor. At a second stage, the modulation and coding scheme of at least one of the communication apparatuses is changed to another scheme having a higher transmission rate, when it is impossible to allocate sufficient resources for the modulation and coding schemes selected at the first stage.