Pointer processor and pointer processing scheme for SDH/SONET transmission system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5751720
SERIAL NO

08671244

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A pointer processor for use in an SDH/SONET transmission system, realizing a proper VC path management. A pointer interpreter constantly monitors 3X pairs of H1 and H2 bytes to contain a prescribed maximum size pointer AU-4-Xc that can possibly be received by the pointer processor, to obtain and hold an inside AU-size map indicating an occupation state of AU pointers on 3X pairs of H1 and H2 bytes, while generating and holding an assigned AU-size map indicating an assigned state of AU pointers on 3X pairs of H1 and H2 bytes according to an externally set AU pointer size, and compares these two AU-size maps. For a part of map where the inside AU-size map coincides with the assigned AU-size map, the pointer interpreter carries out size-fixed pointer interpretations in pointer sizes specified by the assigned AU-size map, and the pointer generator generates transmission pointers in forms of normal pointers or AISs in the pointer sizes specified by the assigned AU-size map according to the size-fixed pointer interpretations. For a part of map where the inside AU-size map does not coincide with the assigned AU-size map, the pointer generator generates AISs in the pointer sizes specified by the assigned AU-size map as the transmission pointers.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NIPPON TELEGRAPH AND TELEPHONE CORPORATIONTOKYO1354

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsuoka, Shinji Kanagawaken, JP 16 233
Uematsu, Yoshihiko Tokyo, JP 6 188

Cited Art Landscape

Patent Info (Count) # Cites Year
 
TTI INVENTIONS A LLC (1)
* 5461622 Method and apparatus for using SONET overheat to align multiple inverse multiplexed data streams 61 1994
 
TRANSWITCH CORPORATION (3)
* 5473611 Apparatus and method for limiting jitter caused by pointer movement while mapping one telecommunications signal into another such signal 6 1994
* 5528598 Apparatus and method for limiting jitter in a telecommunications signal 5 1994
* 5535218 Apparatus and method for limiting jitter in a telecommunications signal which is being mapped in another such signal by temporarily suspending measurement of available data 3 1995
 
NEC CORPORATION (1)
* 5331630 Renewal method and apparatus for AU-4 and TU-3 pointers of synchronous digital hierarchy 11 1992
 
SUMMIT TECHNOLOGY SYSTEMS, LP (1)
* 5390180 SONET DS-N desynchronizer 27 1994
 
TEKTRONIX, INC. (1)
* 5572515 Sonet/SDH signal recognition and selection 35 1994
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
ANRITSU CORPORATION (2)
* 6834059 SDH signal channel pointer analyzing apparatus and method 3 2001
* 2001/0008,536 SDH signal channel pointer analyzing apparatus and method 0 2001
 
Telsima Inc. (3)
6920113 Transport of iscochronous and bursty data on a sonet ring 19 2000
7085293 Scaleable transport of TDM channels in a synchronous frame 5 2001
* 2002/0059,408 Dynamic traffic management on a shared medium 48 2001
 
CISCO TECHNOLOGY, INC. (1)
* 6973041 Path AIS insertion for concatenated payloads across multiple processors 8 2000
 
CIENA CORPORATION (5)
* 6738395 Pointer processing and path BIP-8 computation for large concatenated payloads 4 2000
* 7046699 Pointer processing and path BIP-8 computation for large concatenated payloads 0 2004
* 2004/0187,128 Pointer processing and path BIP8 computation for large concatenated payloads 0 2004
* 7428249 Pointer processing and path BIP-8 computation for large concatenated payloads 1 2006
* 2006/0159,089 Pointer processing and path BIP-8 computation for large concatenated payloads 0 2006
 
FUJITSU LIMITED (8)
* 6157658 Pointer processing apparatus, POH terminating process apparatus, method of POH terminating process and pointer/POH terminating process apparatus in SDH transmission system 19 1997
* 6118795 Reception pointer processing apparatus in SDH transmission system 19 1997
* 6714531 Method and device for avoiding error of pointer process in SDH radio communication 3 1998
* 6763038 Light transmission equipment 1 2000
* 6912201 Pointer processing apparatus, POH terminating process apparatus, method of POH terminating process and pointer/POH terminating process apparatus in SDH transmission system 13 2000
* 7359316 Reception pointer processing apparatus in SDH transmission system 1 2000
* 2002/0122,441 Synchronous digital multiplex transmission method and transmission apparatus 2 2001
* 7522533 Optical transmission apparatus having path trace function 0 2005
* Cited By Examiner