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Aisawa
Shigeki Aisawa, Kanagawa JP
| Patent application number | Description | Published |
|---|---|---|
| 20100177785 | MULTIPLEXING TRANSMISSION SYSTEM AND MULTIPLEXING TRANSMISSION METHOD - A multiplexing transmission system for adding a management overhead to a client signal, and transparently accommodating or multiplexing the client signal to transmit it is provided. The multiplexing transmission system: accommodates a plurality of client signals of different bit rates including a client signal of a bit rate that is not an integral multiple or an integral submultiple of a bit rate of other client signal, and performs rate adjustment for a part or the whole of the plurality of client signals such that the bit rate of each client signal becomes an integral multiple or integral submultiple of the bit rate of other client signal. | 07-15-2010 |
Shigeki Aisawa, Tokyo JP
| Patent application number | Description | Published |
|---|---|---|
| 20100080245 | DIGITAL TRANSMISSION SYSTEM AND DIGITAL TRANSMISSION METHOD - A digital transmission system includes at least a client device and a transmission device, and rate-adjusts the client signal transmitted from the client device to the transmission device before accommodating/multiplexing the signal in a frame. The transmission device includes a rate adjusting unit and a frame processing unit. The rate adjusting unit encapsulates the client signal by using a predetermined frame structure, inserts an idle pattern if necessary, and performs rate adjustment into the bit rate which can be contained in the frame. The frame processing unit accommodates/multiplexes the signal after the rate adjustment. The digital transmission system inserts a bit string of the client signal directly in a payload area of the digital frame, or accommodates and multiplexes it. Alternatively, a specific pattern is accommodated in the payload area, or accommodated and multiplexed after performing a reversible digital signal processing. | 04-01-2010 |
Shigeki Aisawa, Kanagawa-Ken JP
| Patent application number | Description | Published |
|---|---|---|
| 20090162061 | OPTICAL TRANSMISSION SYSTEM AND METHOD - An optical transmission system for performing frequency synchronization even with a client signal with low frequency accuracy, and for transmitting thereof by accommodating/multiplexing without causing a bit slip. A new overhead is added to the entire client signal, and the signal including the new overhead being stuffed is transmitted in conjunction with a plurality of stuffing bits as an optical signal wherein a data storing bit for a negative stuffing, a stuffing information notification bit, and a stuff bits inserting bit for a positive stuffing in the payload are defined in plurality as stuffing bits for adjusting clock frequencies of the client signal in this new overhead. | 06-25-2009 |
Shigeki Aisawa, Yokosuka-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20110262136 | OPTICAL DIGITAL TRANSMISSION SYSTEM - An optical digital transmission system of the present invention newly defines one second negative stuff byte in an overhead area for accommodation of the client signals with multiplexing into the OTU frame, newly defines one third positive stuff byte in a corresponding tributary slot in a payload area for accommodation of client signals with multiplexing, newly defines stuff control bits that is used for decision of the use of the second negative stuff byte and the third positive stuff byte in three different places in the overhead area for client signal accommodation with multiplexing, performs control by using the newly defined stuff control bits when accommodation of the client signal with the third positive stuff byte or the second negative stuff byte is required, and performs stuff control without using the newly defined stuff control bits when accommodation of the client signal by the third positive stuff byte and the second negative stuff byte is not required. | 10-27-2011 |
Syuji Aisawa, Miyagi JP
| Patent application number | Description | Published |
|---|---|---|
| 20100039718 | LENS MODULE - In order to provide a lens module having a simply structured lens drive mechanism that is capable of stabilizing the moving speed of an optical lens system, the lens module has a structure wherein a lens holder (to which no illustrated optical lens system is mounted) ( | 02-18-2010 |