US20020143969A1 - System with multiple network protocol support - Google Patents
System with multiple network protocol support Download PDFInfo
- Publication number
- US20020143969A1 US20020143969A1 US09/821,923 US82192301A US2002143969A1 US 20020143969 A1 US20020143969 A1 US 20020143969A1 US 82192301 A US82192301 A US 82192301A US 2002143969 A1 US2002143969 A1 US 2002143969A1
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- Prior art keywords
- memory
- network protocol
- processor
- program instructions
- data
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/12—Protocol engines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
Definitions
- the present invention relates to networks, and more particularly to multiple protocol support in networks.
- FIG. 1 illustrates a conventional network.
- the network includes a plurality of nodes 102 , 104 , and 106 .
- Each of the nodes 102 - 106 can be functioning using different protocols.
- the packet when a packet is to be exchanged between nodes, the packet must be packed according to the protocol understood by the receiving node, or the receiving node must understand the protocol used by the sending node.
- hardware designed specifically for this protocol is used by a processor in the sending or the receiving node to properly pack or unpack the data.
- the hardware must be redesigned. This is inflexible.
- several hardware units, one for each possible protocol used by a node may be used. Conventionally, this approach requires the hardware units to be external to the processor of the node. This is costly.
- the present invention provides a system with multiple network protocol support.
- the system includes: a first memory, the first memory comprising program instructions for processing upper and lower layers of the network protocol; a first processor, where the first processor processes the upper layers of the network protocol for a data packet according to the program instructions in the first memory; and a second processor, where the second processor processes lower layers of the network protocol for the data packet according to the program instructions in the first memory.
- the network protocol is changed, instructions for the new protocol is fetched from a second memory and placed in the first memory.
- the hardware of the system need not be redesigned when changing protocols, and the same on-system unit is used to implement each protocol. This increases flexibility, provides cost effectiveness, and increases the reliability of the system.
- FIG. 1 illustrates a conventional network
- FIG. 2 illustrates a preferred embodiment of a system with multiple network protocol support in accordance with the present invention.
- FIG. 3 is a flow chart illustrating the receiving of a data packet by the system with multiple network protocol support in accordance with the present invention.
- FIG. 4 is a flow chart illustrating the sending of data by the system with multiple network protocol support in accordance with the present invention.
- the present invention provides an improved system with multiple network protocol support.
- the following description is presented to enable one of ordinary skill in the art to make and use the invention and is provided in the context of a patent application and its requirements.
- Various modifications to the preferred embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments.
- the present invention is not intended to be limited to the embodiment shown but is to be accorded the widest scope consistent with the principles and features described herein.
- FIGS. 2 through 4 in conjunction with the discussion below.
- FIG. 2 illustrates a preferred embodiment of a system with multiple network protocol support in accordance with the present invention.
- the system 200 comprises a first processor 202 , a dual port memory 204 , a second processor 204 , an analog-to-digital converter (ADC) 208 , and a digital-to-analog converter (DAC) 210 .
- the dual port memory 204 comprises an instruction memory 204 a and a data memory 204 b .
- the system 200 may also comprise a master bus 212 through which the elements of the system 200 may communicate.
- An external bus interface 214 provides communication between the system 200 and external elements, such as an external memory 218 .
- the system 200 may also communicate with a network, such as an Ethernet 216 .
- the system in accordance with the present invention may be used in any network in which data packets are exchanged between nodes.
- the nodes may include gateways, sensors, actuators, or any other similar-typed device.
- the first processor 202 processes the upper layers of a network protocol for a data packet.
- the upper layers includes layers three through seven of a conventional seven-layer protocol.
- the seven-layer protocol is well known in the art and will not be further described here.
- the processor 202 unpacks layers three through seven of the network protocol from an interim data stored in the data memory 204 b .
- the processor 202 packs layers seven through three of the network protocol and stores the interim data in the data memory 204 b.
- the instruction memory 204 a of the dual port memory 204 stores the instructions for a particular network protocol. Incoming and outgoing data packets and data are processed according to the instructions stored here.
- the data memory 204 b of the dual port memory 204 stores interim data in the process of being packed or unpacked.
- the second processor 206 processes the lower layers of the network protocol for a data packet.
- the lower layers includes layers one (physical layer) and two (link layer) of a conventional 7 -layer protocol.
- the processor 206 unpacks layers one and two of the network protocol for the packet and stores the interim data in the data memory 204 b .
- the processor 206 fetches an interim data from the data memory 204 b and packs layers one and two of the network protocol for the data.
- the ADC 208 receives an incoming data packet from a media, converts it into a digital signal, and forwards this digital signal to the second processor 206 .
- the DAC 210 receives an outgoing data packet from the second processor 206 , converts the packet into an analog signal, and sends the packet along the media.
- An important feature of the system 200 in accordance with the present invention is the fact that the first processor 202 is used to process the upper layers of the network protocol while a second and separate processor 206 is used to process the lower layers of the network protocol.
- the upper layers are processed using software.
- conventional systems use hardware specifically designed for the particular protocol. This is necessary because layer one and two of the protocol stack typically require tight timing parameters and the processing of analog signals. This hardware must be redesigned whenever the protocol is changed. Otherwise, several hardware units external to the system, one for each possible protocol, is used. But with the system 200 in accordance with the present invention, the lower protocol layers are processed using digital signal processing techniques implemented in software.
- the software instructions for a particular protocol is stored in the instruction memory 204 a .
- the first processor 202 fetches the instructions for the new protocol from a source, such as an external memory 218 , and places these instructions in the instruction memory 204 a .
- the first 202 and the second 206 processors implement the instructions in the instruction memory 204 a .
- the hardware of the system need not be redesigned when changing protocols.
- the same on-system unit is used to implement each protocol, eliminating the need for external hardware units. This increases the flexibility of the system 200 , is more cost effective, and increases the reliability of the system 200 .
- FIG. 3 is a flow chart illustrating the receiving of a data packet by the system with multiple network protocol support in accordance with the present invention.
- the first processor 202 fetches instructions for a protocol from the memory 218 and stores them in the instruction memory 204 a .
- the first processor 202 fetches the instructions for the new protocol from the memory 218 and stores them in the instruction memory 204 a , via step 304 .
- the ADC 208 receives a data packet from the media and converts the packet into a digital signal, via step 306 .
- the second processor 206 unpacks layers one and two of the network protocol for the packet according to the instructions in the instruction memory 204 a , and places the interim data into the data memory 204 b , via step 308 .
- the second processor 206 then sends an interrupt to the first processor 202 , informing the first processor 202 that an interim data has been stored in the data memory 204 b .
- the first processor 202 receives the interrupt and fetches the interim data from the data memory 204 b , via step 312 .
- the first processor 202 then unpacks layers three through seven of the network protocol for the interim data according to the instructions in the instruction memory 204 a , via step 314 .
- the first processor 202 then forwards the unpacked data, via step 316 .
- the unpacked data could be forwarded to a memory, such as memory 218 , or to an Ethernet 216 .
- FIG. 4 is a flow chart illustrating the sending of data by the system with multiple network protocol support in accordance with the present invention.
- the first processor 202 fetches the instructions for the new protocol from the memory 218 and stores them in the instruction memory 204 a , via step 404 .
- the first processor 202 obtains the outgoing data and packs layers three through seven of the network protocol for the data according to the instructions in the instruction memory 204 a , via step 406 .
- the first processor 202 then stores the interim data in the data memory 204 b , via step 408 .
- the second processor 206 fetches the interim data from the data memory 204 b and packs layers one and two of the network protocol for the interim data according to the instructions in the instruction memory 204 a , via step 410 .
- the DAC 210 then converts the data packet into an analog signal and sends the packet onto the media, via step 412 .
- the system comprises a first processor which processes the upper layers and a second and separate processor which processes the lower layers of a network protocol.
- the first processor fetches the instructions for the new protocol from a source and places these instructions in an instruction memory.
- the first and the second processors implement the instructions in the instruction memory. In this manner, the hardware of the system need not be redesigned when changing protocols, and the same on-system unit is used to implement each protocol. This increases flexibility, provides cost effectiveness, and increases the reliability of the system.
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Communication Control (AREA)
Abstract
Description
- The present invention relates to networks, and more particularly to multiple protocol support in networks.
- FIG. 1 illustrates a conventional network. The network includes a plurality of
nodes - Accordingly, there exists a need for an improved system with multiple network protocol support. The system should not require hardware redesign when a protocol is changed and should be cost effective to implement. The present invention addresses such a need.
- The present invention provides a system with multiple network protocol support. The system includes: a first memory, the first memory comprising program instructions for processing upper and lower layers of the network protocol; a first processor, where the first processor processes the upper layers of the network protocol for a data packet according to the program instructions in the first memory; and a second processor, where the second processor processes lower layers of the network protocol for the data packet according to the program instructions in the first memory. When the network protocol is changed, instructions for the new protocol is fetched from a second memory and placed in the first memory. Thus, the hardware of the system need not be redesigned when changing protocols, and the same on-system unit is used to implement each protocol. This increases flexibility, provides cost effectiveness, and increases the reliability of the system.
- FIG. 1 illustrates a conventional network.
- FIG. 2 illustrates a preferred embodiment of a system with multiple network protocol support in accordance with the present invention.
- FIG. 3 is a flow chart illustrating the receiving of a data packet by the system with multiple network protocol support in accordance with the present invention.
- FIG. 4 is a flow chart illustrating the sending of data by the system with multiple network protocol support in accordance with the present invention.
- The present invention provides an improved system with multiple network protocol support. The following description is presented to enable one of ordinary skill in the art to make and use the invention and is provided in the context of a patent application and its requirements. Various modifications to the preferred embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. Thus, the present invention is not intended to be limited to the embodiment shown but is to be accorded the widest scope consistent with the principles and features described herein.
- To more particularly describe the features of the present invention, please refer to FIGS. 2 through 4 in conjunction with the discussion below.
- FIG. 2 illustrates a preferred embodiment of a system with multiple network protocol support in accordance with the present invention. The system200 comprises a
first processor 202, adual port memory 204, asecond processor 204, an analog-to-digital converter (ADC) 208, and a digital-to-analog converter (DAC) 210. Thedual port memory 204 comprises aninstruction memory 204 a and adata memory 204 b. The system 200 may also comprise amaster bus 212 through which the elements of the system 200 may communicate. Anexternal bus interface 214 provides communication between the system 200 and external elements, such as anexternal memory 218. The system 200 may also communicate with a network, such as an Ethernet 216. The system in accordance with the present invention may be used in any network in which data packets are exchanged between nodes. The nodes may include gateways, sensors, actuators, or any other similar-typed device. - The
first processor 202 processes the upper layers of a network protocol for a data packet. Typically, the upper layers includes layers three through seven of a conventional seven-layer protocol. The seven-layer protocol is well known in the art and will not be further described here. In the case of an incoming data packet, theprocessor 202 unpacks layers three through seven of the network protocol from an interim data stored in thedata memory 204 b. In the case of an outgoing data, theprocessor 202 packs layers seven through three of the network protocol and stores the interim data in thedata memory 204 b. - The
instruction memory 204 a of thedual port memory 204 stores the instructions for a particular network protocol. Incoming and outgoing data packets and data are processed according to the instructions stored here. Thedata memory 204 b of thedual port memory 204 stores interim data in the process of being packed or unpacked. - The
second processor 206 processes the lower layers of the network protocol for a data packet. Typically, the lower layers includes layers one (physical layer) and two (link layer) of a conventional 7-layer protocol. In the case of an incoming data packet, theprocessor 206 unpacks layers one and two of the network protocol for the packet and stores the interim data in thedata memory 204 b. In the case of an outgoing data, theprocessor 206 fetches an interim data from thedata memory 204 b and packs layers one and two of the network protocol for the data. - The ADC208 receives an incoming data packet from a media, converts it into a digital signal, and forwards this digital signal to the
second processor 206. The DAC 210 receives an outgoing data packet from thesecond processor 206, converts the packet into an analog signal, and sends the packet along the media. - An important feature of the system200 in accordance with the present invention is the fact that the
first processor 202 is used to process the upper layers of the network protocol while a second andseparate processor 206 is used to process the lower layers of the network protocol. In conventional systems, the upper layers are processed using software. However, to process the lower layers, conventional systems use hardware specifically designed for the particular protocol. This is necessary because layer one and two of the protocol stack typically require tight timing parameters and the processing of analog signals. This hardware must be redesigned whenever the protocol is changed. Otherwise, several hardware units external to the system, one for each possible protocol, is used. But with the system 200 in accordance with the present invention, the lower protocol layers are processed using digital signal processing techniques implemented in software. The software instructions for a particular protocol is stored in theinstruction memory 204 a. Whenever the protocol is to be changed, thefirst processor 202 fetches the instructions for the new protocol from a source, such as anexternal memory 218, and places these instructions in theinstruction memory 204 a. During the processing of data packets, the first 202 and the second 206 processors implement the instructions in theinstruction memory 204 a. In this manner, the hardware of the system need not be redesigned when changing protocols. In addition, the same on-system unit is used to implement each protocol, eliminating the need for external hardware units. This increases the flexibility of the system 200, is more cost effective, and increases the reliability of the system 200. - FIG. 3 is a flow chart illustrating the receiving of a data packet by the system with multiple network protocol support in accordance with the present invention. In the preferred embodiment, upon power up of the system200, the
first processor 202 fetches instructions for a protocol from thememory 218 and stores them in theinstruction memory 204 a. Whenever the network protocol needs to be changed, viastep 302, then thefirst processor 202 fetches the instructions for the new protocol from thememory 218 and stores them in theinstruction memory 204 a, viastep 304. TheADC 208 receives a data packet from the media and converts the packet into a digital signal, viastep 306. Thesecond processor 206 unpacks layers one and two of the network protocol for the packet according to the instructions in theinstruction memory 204 a, and places the interim data into thedata memory 204 b, viastep 308. Thesecond processor 206 then sends an interrupt to thefirst processor 202, informing thefirst processor 202 that an interim data has been stored in thedata memory 204 b. Thefirst processor 202 receives the interrupt and fetches the interim data from thedata memory 204 b, viastep 312. Thefirst processor 202 then unpacks layers three through seven of the network protocol for the interim data according to the instructions in theinstruction memory 204 a, viastep 314. Thefirst processor 202 then forwards the unpacked data, viastep 316. The unpacked data could be forwarded to a memory, such asmemory 218, or to anEthernet 216. - FIG. 4 is a flow chart illustrating the sending of data by the system with multiple network protocol support in accordance with the present invention. Whenever the network protocol needs to be changed, via
step 402, thefirst processor 202 fetches the instructions for the new protocol from thememory 218 and stores them in theinstruction memory 204 a, viastep 404. Thefirst processor 202 obtains the outgoing data and packs layers three through seven of the network protocol for the data according to the instructions in theinstruction memory 204 a, viastep 406. Thefirst processor 202 then stores the interim data in thedata memory 204 b, viastep 408. Next, thesecond processor 206 fetches the interim data from thedata memory 204 b and packs layers one and two of the network protocol for the interim data according to the instructions in theinstruction memory 204 a, viastep 410. TheDAC 210 then converts the data packet into an analog signal and sends the packet onto the media, viastep 412. - An improved system with multiple network protocol support has been disclosed. The system comprises a first processor which processes the upper layers and a second and separate processor which processes the lower layers of a network protocol. When the protocol is changed, the first processor fetches the instructions for the new protocol from a source and places these instructions in an instruction memory. During the processing of data packets, the first and the second processors implement the instructions in the instruction memory. In this manner, the hardware of the system need not be redesigned when changing protocols, and the same on-system unit is used to implement each protocol. This increases flexibility, provides cost effectiveness, and increases the reliability of the system.
- Although the present invention has been described in accordance with the embodiments shown, one of ordinary skill in the art will readily recognize that there could be variations to the embodiments and those variations would be within the spirit and scope of the present invention. Accordingly, many modifications may be made by one of ordinary skill in the art without departing from the spirit and scope of the appended claims.
Claims (14)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US09/821,923 US20020143969A1 (en) | 2001-03-30 | 2001-03-30 | System with multiple network protocol support |
US11/051,286 US20050129065A1 (en) | 2001-03-30 | 2005-02-04 | System with multiple network protocol support |
US12/414,001 US8001256B2 (en) | 2001-03-30 | 2009-03-30 | System with multiple network protocol support |
US13/210,426 US9037741B2 (en) | 2001-03-30 | 2011-08-16 | System with multiple network protocol support |
Applications Claiming Priority (1)
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US09/821,923 US20020143969A1 (en) | 2001-03-30 | 2001-03-30 | System with multiple network protocol support |
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US11/051,286 Continuation US20050129065A1 (en) | 2001-03-30 | 2005-02-04 | System with multiple network protocol support |
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US11/051,286 Abandoned US20050129065A1 (en) | 2001-03-30 | 2005-02-04 | System with multiple network protocol support |
US12/414,001 Expired - Fee Related US8001256B2 (en) | 2001-03-30 | 2009-03-30 | System with multiple network protocol support |
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US12/414,001 Expired - Fee Related US8001256B2 (en) | 2001-03-30 | 2009-03-30 | System with multiple network protocol support |
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Cited By (5)
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US20050129065A1 (en) * | 2001-03-30 | 2005-06-16 | Dietmar Loy | System with multiple network protocol support |
US20070208894A1 (en) * | 2006-03-02 | 2007-09-06 | Curry David S | Modification of a layered protocol communication apparatus |
KR100982630B1 (en) | 2003-01-02 | 2010-09-15 | 톰슨 라이센싱 | Device and process for adjusting the bit rate of a stream of contents and associated products |
WO2010130741A1 (en) * | 2009-05-11 | 2010-11-18 | Continental Teves Ag & Co. Ohg | Control device for vehicles in bidirectional ad hoc network radio communication |
US9237599B2 (en) | 2009-05-11 | 2016-01-12 | Continental Teves Ag & Co. Ohg | Controller in bidirectional adhoc network radio communication |
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US20050025315A1 (en) * | 2003-07-31 | 2005-02-03 | Kreitzer Stuart S. | Method and apparatus for secure communications among portable communication devices |
US7596224B2 (en) * | 2004-12-07 | 2009-09-29 | Motorola, Inc. | Method and system for secure call alert |
US9326135B2 (en) | 2008-02-21 | 2016-04-26 | Google Technology Holdings LLC | Method and apparatus for secure communication in a digital two way radio protocol |
US11863320B2 (en) | 2021-02-26 | 2024-01-02 | Dialog Semiconductor US Inc. | Communication media sharing among devices having dissimilar physical layer waveforms |
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-
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-
2009
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Cited By (6)
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US20050129065A1 (en) * | 2001-03-30 | 2005-06-16 | Dietmar Loy | System with multiple network protocol support |
KR100982630B1 (en) | 2003-01-02 | 2010-09-15 | 톰슨 라이센싱 | Device and process for adjusting the bit rate of a stream of contents and associated products |
US20070208894A1 (en) * | 2006-03-02 | 2007-09-06 | Curry David S | Modification of a layered protocol communication apparatus |
WO2010130741A1 (en) * | 2009-05-11 | 2010-11-18 | Continental Teves Ag & Co. Ohg | Control device for vehicles in bidirectional ad hoc network radio communication |
CN102461080A (en) * | 2009-05-11 | 2012-05-16 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Controller in bidirectional adhoc network radio communication |
US9237599B2 (en) | 2009-05-11 | 2016-01-12 | Continental Teves Ag & Co. Ohg | Controller in bidirectional adhoc network radio communication |
Also Published As
Publication number | Publication date |
---|---|
US8001256B2 (en) | 2011-08-16 |
US20100036961A1 (en) | 2010-02-11 |
US20050129065A1 (en) | 2005-06-16 |
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