IES80918B2 - An atm cell processor - Google Patents
An atm cell processorInfo
- Publication number
- IES80918B2 IES80918B2 IES980712A IES80918B2 IE S80918 B2 IES80918 B2 IE S80918B2 IE S980712 A IES980712 A IE S980712A IE S80918 B2 IES80918 B2 IE S80918B2
- Authority
- IE
- Ireland
- Prior art keywords
- processor
- cell
- function
- cells
- memory
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/25—Routing or path finding in a switch fabric
- H04L49/253—Routing or path finding in a switch fabric using establishment or release of connections between ports
- H04L49/255—Control mechanisms for ATM switching fabrics
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/30—Peripheral units, e.g. input or output ports
- H04L49/3081—ATM peripheral units, e.g. policing, insertion or extraction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
- H04Q11/0478—Provisions for broadband connections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5638—Services, e.g. multimedia, GOS, QOS
- H04L2012/5646—Cell characteristics, e.g. loss, delay, jitter, sequence integrity
- H04L2012/5652—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly
- H04L2012/5653—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly using the ATM adaptation layer [AAL]
- H04L2012/5658—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly using the ATM adaptation layer [AAL] using the AAL5
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5678—Traffic aspects, e.g. arbitration, load balancing, smoothing, buffer management
- H04L2012/5681—Buffer or queue management
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
An ATM cell processor (10) has a backplane interface (11), a line interface (15), and various processing functions between the interfaces. Cells directed to the line interface (15) are controlled by a queueing function (12) which uses external cell memory via a controller (13) and external control memory via a controller (14). Cells from the backplane are identified and routed by a mapping function (16).
Description
The invention relates to a processor for handling asynchronous transfer mode (ATM) cells. An object of the invention is to provide for efficient handling of cells by a processor. Another object is that the processor has flexibility in the manner in which it operates so that it may be used in different environments with relatively simple configuration.
A still further object is to provide a cell processor which may be controlled in a 10 comprehensive manner with relatively simple control circuits.
According to the invention, there is provided an ATM cell processor comprising at least two interfaces, and a queueing function between the interfaces for controlling transfer of cells. The queueing function allows cell traffic management in a very effective manner.
The interfaces are preferably bi-directional.
Preferably, the queueing function uses a cell memory for storage of cell queues, and a control memory for storing queueing control settings. This is a very effective way of achieving the necessary control in a flexible manner.
In one embodiment, the memory is at least partly external to the processor and is accessed via a controller. This allows easy expansion and flexibility for different applications generally.
In another embodiment, the processor further comprises a mapping function for mapping received cells from a line according to the VPI/VCI. This allows integration of the processor into a system having multiple internal destinations for received cells.
Preferably, the mapping function comprises means for adding an additional header for internal control signalling. This further enhances effectiveness of internal routing of signals.
Claims (5)
1. An ATM cell processor comprising at least two interfaces, and a queuing function between the interfaces for controlling transfer of cells.
2. A cell processor as claimed in claim 1, wherein the interfaces are bi-directional, and wherein the queuing function uses a cell memory for storage of cell queues, and a control memory for storing queueing control settings, and wherein the memory is at least partly external to the processor and is accessed via a controller, and wherein the processor further comprises a mapping function for mapping received cells from a line according to the VPI/VCl, and wherein the mapping function comprises means for adding an additional header for internal control signalling.
3. A cell processor as claimed in claims 1 or 2, further comprising a policing function for monitoring traffic characteristics of cells received from the line.
4. A cell processor as claimed in any preceding claim, further comprising a segmentation and reassembly (SAR) interface for handling ATM cell control signals, and wherein the SAR interface is connected to the queueing function, and wherein the processor further comprises a control processor interface connected to a memory controller to allow initial setup configuration and on-going monitoring.
5. A cell processor substantially as described with reference to the drawings. 1/3 ίο LINE MICROPROCESSOR SRAM «5 Fig.l
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE980712A IES980712A2 (en) | 1997-12-15 | 1998-08-31 | An ATM cell processor |
AU16804/99A AU1680499A (en) | 1997-12-15 | 1998-12-15 | An atm cell processor |
CA002315052A CA2315052A1 (en) | 1997-12-15 | 1998-12-15 | An atm cell processor |
IE981056A IE981056A1 (en) | 1997-12-15 | 1998-12-15 | An ATM Cell Processor |
JP2000539674A JP2002509412A (en) | 1997-12-15 | 1998-12-15 | ATM cell processor |
PCT/IE1998/000106 WO1999031928A2 (en) | 1997-12-15 | 1998-12-15 | An atm cell processor |
EP98961336A EP1040707A2 (en) | 1997-12-15 | 1998-12-15 | An atm cell processor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE970888 | 1997-12-15 | ||
IE980712A IES980712A2 (en) | 1997-12-15 | 1998-08-31 | An ATM cell processor |
Publications (2)
Publication Number | Publication Date |
---|---|
IES80918B2 true IES80918B2 (en) | 1999-06-30 |
IES980712A2 IES980712A2 (en) | 1999-06-30 |
Family
ID=26320137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE980712A IES980712A2 (en) | 1997-12-15 | 1998-08-31 | An ATM cell processor |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1040707A2 (en) |
JP (1) | JP2002509412A (en) |
AU (1) | AU1680499A (en) |
CA (1) | CA2315052A1 (en) |
IE (1) | IES980712A2 (en) |
WO (1) | WO1999031928A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030067874A1 (en) * | 2001-10-10 | 2003-04-10 | See Michael B. | Central policy based traffic management |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3599392B2 (en) * | 1994-12-15 | 2004-12-08 | 富士通株式会社 | switch |
EP0719065A1 (en) * | 1994-12-20 | 1996-06-26 | International Business Machines Corporation | Multipurpose packet switching node for a data communication network |
US5664116A (en) * | 1995-07-07 | 1997-09-02 | Sun Microsystems, Inc. | Buffering of data for transmission in a computer communication system interface |
US6128303A (en) * | 1996-05-09 | 2000-10-03 | Maker Communications, Inc. | Asynchronous transfer mode cell processing system with scoreboard scheduling |
-
1998
- 1998-08-31 IE IE980712A patent/IES980712A2/en not_active IP Right Cessation
- 1998-12-15 JP JP2000539674A patent/JP2002509412A/en active Pending
- 1998-12-15 WO PCT/IE1998/000106 patent/WO1999031928A2/en not_active Application Discontinuation
- 1998-12-15 CA CA002315052A patent/CA2315052A1/en not_active Abandoned
- 1998-12-15 AU AU16804/99A patent/AU1680499A/en not_active Abandoned
- 1998-12-15 EP EP98961336A patent/EP1040707A2/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO1999031928A3 (en) | 1999-10-28 |
JP2002509412A (en) | 2002-03-26 |
WO1999031928A2 (en) | 1999-06-24 |
IES980712A2 (en) | 1999-06-30 |
EP1040707A2 (en) | 2000-10-04 |
CA2315052A1 (en) | 1999-06-24 |
AU1680499A (en) | 1999-07-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Patent lapsed |