Transmitting apparatus and signal transmitting method
A transmitting apparatus includes a frame dividing circuit that maps frame data of each of a plurality of frames whose period is different from each other into one or a plurality of internal frames having a fixed frame period and a fixed transmission rate, based on a predetermined internal clock; a cross-connect circuit that cross-connects the frame data of each in a time division multiplexing system based on the internal clock in units of the internal frames; and a frame combining circuit that demaps, into any of the plurality of frames, or multiplexes, data of one or a plurality of internal frames cross-connected by the cross-connect circuit.
1. A transmitting apparatus comprising:
a frame dividing circuit that maps frame data of each of a plurality of frames having a different period into one or a plurality of internal frames having a fixed frame period and a fixed transmission rate, based on a predetermined internal clock;
a cross-connect circuit that cross-connects the frame data of the plurality of frames in a time division multiplexing system based on the predetermined internal clock in units of the internal frames; and
a frame combining circuit that demaps, into any of the plurality of frames, or multiplexes, data of one or the plurality of internal frames cross-connected by the cross-connect circuit.
2. The transmitting apparatus according to claim 1 , wherein
the frame data of each is mapped into a payload of the internal frame; and
when mapping a first frame of the plurality of frames into m units of internal frames, a transmission rate of the internal frame is larger than a value obtained by dividing a transmission rate of the first frame by said m.
3. The transmitting apparatus according to claim 2 , wherein
an overhead of any internal frame among the m units of internal frames includes information identifying a location at which data of the first frame is mapped in a payload of each internal frame.
4. The transmitting apparatus according to claim 2 , wherein
among the m units of internal frames, an overhead of the (n−1)th internal frame includes information identifying a location at which data of the first frame is mapped in the payload of the n-th internal frame.
5. The transmitting apparatus according to claim 2 , wherein
mapping at the frame dividing circuit is performed in GMP (Generic Mapping Procedure) system, and
the frame combining circuit demaps, or multiplexes, in units of bytes, data of a payload of each of one or a plurality of internal frames.
6. A signal transmitting method comprising: mapping, using a transmitting apparatus, frame data of each of a plurality of frames having a different period into one or a plurality of internal frames having a fixed frame period and a fixed transmission rate, based on a predetermined internal clock of the transmitting apparatus; cross-connecting the frame data of the plurality of frames in a time division multiplexing system in units of the internal frames based on the predetermined internal clock; and demapping, into any of the plurality of frames, or multiplexing, data of said cross-connected one or the plurality of internal frames.
7. The signal transmitting method according to claim 6 , wherein
the frame data of each is mapped into a payload of the internal frame; and
when mapping a first frame of the plurality of frames into m units of internal frames, a transmission rate of the internal frame is larger than a value obtained by dividing a transmission rate of the first frame by said m.
8. The signal transmitting method according to claim 7 , wherein
an overhead of any internal frame among the m units of internal frames includes information identifying a location at which data of the first frame is mapped in a payload of each internal frame.
9. The signal transmitting method according to claim 7 , wherein
among the m units of internal frames, an overhead of the (n−1)th internal frame includes information identifying a location at which data of the first frame is mapped in the payload of the n-th internal frame.
10. The signal transmitting method according to claim 7 , wherein
the mapping into the internal frame is performed in GMP (Generic Mapping Procedure) system, and
data of a payload of each of one or a plurality of internal frames is demapped, or multiplexed, in units of bytes.
11. A non-transitory computer-readable medium which when executed on a transmitting apparatus having a processor causes the transmitting apparatus to perform a process comprising:
mapping frame data of each of a plurality of frames having a different period into one or a plurality of internal frames having a fixed frame period and a fixed transmission rate, based on a predetermined internal clock;
cross-connecting the frame data of the plurality of frames in a time division multiplexing system in units of the internal frames based on the predetermined internal clock; and
demapping, into any of the plurality of frames, or multiplexing, data of said cross-connected one or the plurality of internal frames.