RADIO BASE STATION, MASTER STATION APPARATUS, SLAVE STATION APPARATUS, AND CONTROL METHOD

摘要

A master station apparatus modulates downlink digital control data that includes at least a synchronization signal and a control signal, adds resource element information to the modulated control data, and composites downlink digital frequency-domain user data that has not been modulated and data originating from the modulated control data to which the resource element information has been added. A slave station apparatus converts a received optical signal into an electrical signal, separates, from the electrical signal, the frequency-domain user data and the data originating from the modulated control data, modulates the frequency-domain user data, adds resource element information to the modulated user data, and transmits time-domain composite data including a component originating from the modulated user data and a component originating from the modulated control data by radio waves.

主权项

1. A radio base station comprising:
a master station apparatus; a slave station apparatus that performs radio communication with user equipment; and an optical communication channel that connects the slave station apparatus and the master station apparatus, wherein the master station apparatus includes:
a modulated control data generation unit that modulates downlink digital control data that includes at least a synchronization signal and a control signal to generate modulated control data;a resource element mapping unit that adds, to the modulated control data, resource element information indicating a resource element for radio-transmitting the control data in the slave station apparatus;a combining unit that combines downlink digital frequency-domain user data that has not been modulated and data originating from the modulated control data to which the resource element information has been added; andan output conversion unit that converts output data of the combining unit into an optical signal transmittable over the optical communication channel, and wherein the slave station apparatus includes:
an optical-electrical conversion unit that converts the optical signal received via the optical communication channel into an electrical signal;a separation unit that separates, from the electrical signal, the frequency-domain user data and the data originating from the modulated control data;a modulated user data generation unit that modulates the frequency-domain user data to generate modulated user data;a resource element mapping unit that adds, to the modulated user data, resource element information indicating a resource element for radio-transmitting the user data; anda radio transmission unit that transmits, by radio waves, time-domain composite data including a component originating from the modulated user data to which the resource element information has been added and a component originating from the modulated control data to which the resource element information has been added.