Electronic Device and Method for Flow Control

• US 20090122703A1
• Filed: 04/03/2006
• Published: 05/14/2009
• Est. Priority Date: 04/13/2005
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Radulescu, Andrei, Gangwal, Om Prakash
• Application Number:
  US11/911,034
• Publication Number:
  US 20090122703A1
• Time in Patent Office: Days
• US Class Current: 370/235
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/29 using a combination of thresholds
• CPC Class Codes: H04L 47/35 by embedding flow control information in regular packets, e.g. piggybacking
• CPC Class Codes: H04L 47/39 Credit based

Abstract

An electronic device is provided comprising a plurality of processing units (IP; MIP, SIP); an interconnect means (NOC) for coupling the plurality of processing units (IP; MIP, SIP); and a plurality of interia.ee means (NI; MNI, SNI) arranged between one of the processing units (IP; MIP, SIP) and the interconnect means (NOC), for enabling a communication between the processing units (IP; MIP, SIP) and the interconnect means. The communication between the processing units (IP; MIP, SIP) is a packet-based communication via the interface means (NI; MNI, SNI) and the interconnect means (NOC). Each packet first comprises a first header (H) followed by a pay load (P). Said interface means comprise (NI; MNI, SNI) a flow control means (FCM) for controlling the communication flow between two processing units (IP; MIP, SIP) based on flow control credit information (C), for inserting the first header (H) in each packet, and for additionally inserting a second header (H) into a packet according to an amount of required flow control credit information (C).

Claims

1. Electronic device, comprising

a plurality of processing units (IP;

MIP, SIP);

an interconnect means (NOC) for coupling the plurality of processing units (IP;

MIP, SIP);

a plurality of interface means (NI;

MNI, SNI) arranged between one of the processing units (IP;

MIP, SIP) and the interconnect means (NOC), for enabling a communication between the processing units (IP;

MIP, SIP) and the interconnect means;

wherein the communication between the processing units (IP;

MIP, SIP) is a packet-based communication via the interface means (NI;

MNI, SNI) and the interconnect means (NOC);

wherein each packet first comprises a first header (H) followed by a payload (P);

wherein said interface means comprise (NI;

MNI, SNI) a flow control means (FCM) for controlling the communication flow between two processing units (IP;

MIP, SIP) based on flow control credit information (C), for inserting the first header (H) in each packet, and for additionally inserting a second header (H) into a packet according to an amount of required flow control credit information (C).

2. Electronic device according to claim 1, wherein the flow control means (FCM) is adapted to insert the second header (H) at pre-defined positions.

3. Electronic device according to claim 1, wherein the interface means (NI;

MNI, SNI) comprises a slot table (ST) with flow control information, wherein the flow control means (FCM) is adapted to insert the second header (H) according to the flow control information stored in the slot table (ST).

4. Electronic device according to claim 1, wherein the flow control means (FCM) is adapted to insert the second header (H) if the flow control credit information exceed a pre-defined value (CT;

PLT).

5. Electronic device according to claim 1, wherein the flow control means (FCM) is adapted to insert the second header (H) at pre-defined positions;

to insert the second header (H) according to the flow control information stored in a slot table (ST) which is arranged in the interface means; and

/or to insert the second header (H) if the flow control credit information exceed a pre-defined value (CT;

PLT).

6. Method for flow control in an electronic device having a plurality of processing units (IP;

MIP, SIP);

an interconnect means (NOC) for coupling the plurality of processing units (IP;

MIP, SIP); and

a plurality of interface means (NI;

MNI, SNI) arranged between one of the processing units (IP;

MIP, SIP) and the interconnect means (NOC), for enabling a communication between the processing units (IP;

MIP, SIP) and the interconnect means;

wherein the communication between the processing units (IP;

MIP, SIP) is a packet-based communication via the interface means (NI;

MNI, SNI) and the interconnect means (NOC);

wherein each packet first comprises a first header (H) followed by a payload (P);

said method comprising the steps of;

controlling the communication flow between two processing units (IP;

MIP, SIP) based on flow control credit information (C);

inserting the first header (H) in each packet, and

additionally inserting a second header (H) into a packet according to an amount of required flow control credit information (C).