US 5,687,015 A · Radio apparatus

Abstract

Disclosed is a radio apparatus in a synchronous digital hierarchy (SDH) network in which a radio transmission line having a plurality of radio lines is installed between optical transmission lines each having a plurality of optical lines. The radio apparatus includes a plurality of channel boards, each of which is provided between an optical line and a radio line, for transmitting an optical signal received from the optical line to the radio line and transmitting a signal received from the radio line to the optical line, a setting unit, which is provided to be shared by each channel board, for attaching, per channel board, priority value to clock contained in each signal sent in via an optical line and a radio line, and for setting, per channel board, whether the clock of each priority value is to be outputted or not, and an equipment-clock decision unit for deciding a clock shared by the entire apparatus. Each channel board enters a clock, whose output has been designated by the setting unit, as well as the priority value and quality value of the clock, into the equipment-clock decision unit. On the basis of the quality value and priority value of each clock entered from each channel board, the equipment-clock decision unit decides the equipment clock and enters the equipment clock into each channel board.

Claims17

Dependent claims

A radio apparatus in a synchronous digital hierarchy network in which a radio transmission line having a plurality of radio lines is installed between optical transmission lines each having a plurality of optical lines, said radio apparatus comprising:

a plurality of channel boards, each of which is provided between an optical line and a radio line, for transmitting an optical signal received from the optical line to the radio line and transmitting a signal received from the radio line to the optical line;
a setting unit, which is provided to be shared by each channel board, for attaching, per channel board, priority value to clock contained in each signal sent in via an optical line and a radio line, and for setting, per channel board, whether the clock of each priority value is to be outputted or not;
an equipment-clock decision unit for deciding a clock shared by the entire apparatus as an equipment clock;
and
a clock supply line, which is provided for each priority value, for connecting a clock output terminal for a prescribed priority value in each channel board and a clock input terminal for said priority value in the equipment-clock decision unit, and for entering a clock having this priority value into said equipment-clock decision unit from a prescribed channel board;
wherein a channel board that has outputted a clock of prescribed priority value via said clock supply line extracts quality value data from a signal containing this clock and enters the quality value into said equipment-clock decision unit, and said equipment-clock decision unit decides an equipment clock based upon a quality value and a priority value of each entered clock and enters the equipment clock into each channel board.

3 more elements

a plurality of channel boards, each of which is provided between an optical line and a radio line, for transmitting an optical signal received from the optical line to the radio line and transmitting a signal received from the radio line to the optical line;
a setting unit, which is provided to correspond to each channel board, for attaching priority value to clock contained in each signal sent in via an optical line and a radio line of the corresponding channel board, and for setting whether the clock of each priority value is to be outputted from the channel board or not;
an equipment-clock decision unit for deciding a clock shared by the entire apparatus as an equipment clock;
and
a clock supply line, which is provided for each priority value, for connecting a clock output terminal for a prescribed priority value in each channel board and a clock input terminal for said priority value in the equipment-clock decision unit, and for entering a clock having this priority value into said equipment-clock decision unit from a prescribed channel board;
and
a busy-signal line, which is provided for each priority value, for sending a busy signal by which a channel board notifies other channel boards of the fact that output of a clock having a prescribed priority value has been commanded;
wherein said channel board includes:
a clock output controller which, when output of a clock having a prescribed priority value has been commanded from said setting unit, outputs said clock when a busy signal corresponding to said priority value is not entering and inhibits output of said clock when the busy signal corresponding to said priority value is entering;
and
a busy-signal transmitter which, if a clock having a prescribed priority value is outputted to said clock supply line, sends the busy signal corresponding to said priority value to said busy signal line;
wherein a channel board that outputs a clock of a prescribed priority value via said clock supply line extracts quality value data from a signal containing this clock and enters the quality value into said equipment-clock decision unit;
and
said equipment-clock decision unit decides the equipment clock based upon the quality value and priority value of each entered clock and enters the equipment clock into each channel board.

11 more elements

Dependencies are inferred from the claim text.

Radio apparatus

Life of this patent

Radio apparatus

Life of this patent

Abstract

Claims17