Relay station, relay method, radio communication system, and radio communication apparatus

摘要

A relay node in a mobile communication network for relaying communications between a base station and a mobile terminal The relay node includes a first communication unit that communicates with the base station via a backhaul link using at least one of a first modulation method and a first multiplexing method, and a second communication unit that communicates with the mobile terminal via an access link using at least one of a second modulation method and a second multiplexing method. The relay node also includes a communication control unit that selects the at least one of the first modulation method and the first multiplexing method, or selects the at least one of the second modulation method and the second multiplexing method based on a characteristic of a link, a type of link or a type of data included in a communication signal.

主权项

1. A relay node in a mobile communication network for relaying communications between a base station and a mobile terminal, the relay node comprising:
circuitry configured to:
communicate with the base station via a backhaul link using a first combination of a first modulation method and a first multiplexing method;communicate with the mobile terminal via an access link using a second combination of a second modulation method and a second multiplexing method; andselect either Single Carrier-Frequency Division Multiple Access (SC-FDMA) or Orthogonal Frequency Division Multiple Access (OFDMA) as the first combination and the second combination based on whether the communication is via the backhaul link with the base station or the access link with the mobile terminal, and whether the communication is an uplink connection or a downlink connection, wherein
the circuitry is configured to select the OFDMA as the first combination when the circuitry determines a high transmission power is available for the communication via the backhaul link with the base station, or select the OFDMA as the second combination when the circuitry determines the high transmission power is available for the communication via the access link with the mobile terminal,the circuitry is configured to select the SC-FDMA as the first combination when the circuitry determines the high transmission power is not available for the communication via the backhaul link with the base station, or select the SC-FDMA as the second combination when the circuitry determines the high transmission power is not available for the communication via the access link with the mobile terminal, andthe circuitry is configured to select either the SC-FDMA or the OFDMA for both of the uplink connection and the downlink connection when the circuitry determines data included in the communications is for a real-time application.