US Patent No: 7,095,742

Number of patents in Portfolio can not be more than 2000

Packet processing unit

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ALSO PUBLISHED AS: 20030012198
ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

A packet receiving circuit splits the packet received from a transmission channel into a fixed length of cells and outputs the cells, a search key extracting circuit extracts a predetermined search key from the above-mentioned cells, a CAM performs retrieval based on the above-mentioned search key and outputs a memory address corresponding to the search key, a matching entry address receiving and associative data address transmitting circuit calculates the memory address of an associative data memory based on the above-mentioned memory address and outputs the information stored in the associative data memory as associative data, a search result (associative data) receiving circuit receives the above-mentioned associative data and performs header updating and destination address of the above-mentioned cells, and a packet transmitting circuit outputs the above-mentioned cells in the form of a packet to a transmission channel.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NEC CORPORATIONTOKYO17429

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ikegai, Yasuyuki Tokyo, JP 2 13
Kaganoi, Teruo Tokyo, JP 29 67
Shizume, Dai Tokyo, JP 4 9

Cited Art

Patent Info (Count) # Cites Year
 
CISCO TECHNOLOGY, INC. (2)
6,374,326 Multiple bank CAM architecture and method for performing concurrent lookup operations 98 1999
6,606,681 Optimized content addressable memory (CAM) 51 2001
 
ALCATEL INTERNETWORKING, INC. (1)
6,549,519 Network switching device with pipelined search engines 41 1998
 
FUJITSU LIMITED (1)
6,411,620 Connectionless communication system 10 1997
 
HITACHI, LTD. (1)
6,553,031 Communication node apparatus with routing tables in cache memories 62 1999
 
MATSUSHITA ELECTRIC CORPORATION OF AMERICA (1)
5,438,535 Content addressable memory system 39 1994
 
RAKUTEN, INC. (1)
6,741,596 Pipeline type processor for asynchronous transfer mode (ATM) cells 3 1999
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
6,181,698 Network routing table using content addressable memory 86 1997

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
HITACHI, LTD. (3)
7,286,535 Device for flow classifying and packet forwarding device with flow classify function 8 2002
7,653,062 Packet forwarding apparatus with packet controlling functions 1 2006
7,773,600 Device for flow classifying and packet forwarding device with flow classify function 0 2007
 
BROADCOM CORPORATION (2)
7,983,291 Flexible packet modification engine for a network device 0 2005
7,813,337 Network packet processing using multi-stage classification 0 2007
 
BROCADE COMMUNICATIONS SYSTEMS, INC. (1)
8,090,901 TCAM management approach that minimize movements 3 2009
 
NETLOGIC MICROSYSTEMS, INC. (1)
7,251,707 Content based content addressable memory block enabling using search key 7 2004

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
7.5 Year Payment $3600.00 $1800.00 $900.00 Feb 22, 2014
11.5 Year Payment $7400.00 $3700.00 $1850.00 Feb 22, 2018
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Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00