公开(公告)号：US11621913B2

公开(公告)日：2023-04-04

申请号：US16469455

申请日：2018-06-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Pranjal Dutta

IPC: H04L45/00 ,  H04L45/50

Abstract: Various example embodiments relate generally to supporting path compression in routing of source routed packets in communication networks. Various example embodiments for supporting path compression in routing of source routed packets may be configured to support path compression in routing of source routed packets based on use of various source routing protocols which may be based on various underlying communication protocols. Various example embodiments for supporting path compression in routing of source routed packets may be configured to support path compression in routing of source routed packets based on encoding of a set of hops within a header of a source routed packet using a path identifier (e.g., a path label, a path address, or the like) representing the set of hops (e.g., a set of hops providing a segment of the path, a set of hops providing a protection path configured to protect a portion of the path, or the like).

公开(公告)号：US20210320861A1

公开(公告)日：2021-10-14

申请号：US16469455

申请日：2018-06-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Pranjal Dutta

IPC: H04L12/721 ,  H04L12/723 ,  H04L12/707

Abstract: Various example embodiments relate generally to supporting path compression in routing of source routed packets in communication networks. Various example embodiments for supporting path compression in routing of source routed packets may be configured to support path compression in routing of source routed packets based on use of various source routing protocols which may be based on various underlying communication protocols. Various example embodiments for supporting path compression in routing of source routed packets may be configured to support path compression in routing of source routed packets based on encoding of a set of hops within a header of a source routed packet using a path identifier (e.g., a path label, a path address, or the like) representing the set of hops (e.g., a set of hops providing a segment of the path, a set of hops providing a protection path configured to protect a portion of the path, or the like).

公开(公告)号：US11095555B2

公开(公告)日：2021-08-17

申请号：US16469415

申请日：2018-06-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Pranjal Dutta

IPC: G06F15/16 ,  H04L12/723 ,  H04L12/733 ,  H04L12/707 ,  H04L12/703

Abstract: Various example embodiments for supporting packet forwarding in communication networks are described. Various example embodiments for supporting packet forwarding in communication networks may be configured to support packet forwarding in label switched packet networks. Various example embodiments for supporting packet forwarding in label switched packet networks may utilize a variable-sized label value field to encode label values within a header of a label switched packet. Various example embodiments for supporting packet forwarding in label switched packet networks may utilize a variable-sized label value field to encode label values within a label stack in a header of a label switched packet. Various example embodiments for supporting packet forwarding in label switched packet networks may encode a label value within a label stack in a header of a label switched packet using a variable-sized label value field having a size that is based on the label value.

公开(公告)号：US11469995B2

公开(公告)日：2022-10-11

申请号：US16469427

申请日：2018-06-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Pranjal Dutta

IPC: H04L45/00 ,  H04L45/50 ,  H04L45/741 ,  H04L45/64

Abstract: Various example embodiments relate generally to supporting flow-specific fast rerouting of source routed packets in communication networks. Various example embodiments for supporting flow-specific fast rerouting of source routed packets may be configured to support flow-specific fast rerouting of source routed packets based on use of various source routing protocols which may be based on various underlying communication protocols. Various example embodiments for supporting flow-specific fast rerouting of source routed packets in communication networks may be configured to support flow-specific fast rerouting of source routed packets by supporting use of a source routed packet including a payload and a header where the header encodes a set of hops of a primary path for the source routed packet and where the header also encodes a set of hops of a protection path configured to protect one of the hops of the primary path for the source routed packet.

公开(公告)号：US20200287824A1

公开(公告)日：2020-09-10

申请号：US16469415

申请日：2018-06-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Pranjal Dutta

IPC: H04L12/723 ,  H04L12/703 ,  H04L12/707 ,  H04L12/733

Abstract: Various example embodiments for supporting packet forwarding in communication networks are described. Various example embodiments for supporting packet forwarding in communication networks may be configured to support packet forwarding in label switched packet networks. Various example embodiments for supporting packet forwarding in label switched packet networks may utilize a variable-sized label value field to encode label values within a header of a label switched packet. Various example embodiments for supporting packet forwarding in label switched packet networks may utilize a variable-sized label value field to encode label values within a label stack in a header of a label switched packet. Various example embodiments for supporting packet forwarding in label switched packet networks may encode a label value within a label stack in a header of a label switched packet using a variable-sized label value field having a size that is based on the label value.

公开(公告)号：US20190386881A1

公开(公告)日：2019-12-19

申请号：US16008204

申请日：2018-06-14

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Pranjal Dutta

IPC: H04L12/24 ,  H04L12/759 ,  H04L12/18

Abstract: Various example embodiments for supporting leaf node discovery for multicast trees in packet switched communication networks are described. Various example embodiments for supporting leaf node discovery for multicast trees may be configured to enable the root node of a multicast tree to be informed explicitly whenever a leaf router joins or leaves the multicast tree, thereby supporting efficient and reliable leaf node discovery. Various example embodiments for supporting leaf node discovery for a multicast tree may support discovery of leaf nodes of the multicast tree based on a process in which a transit node sends a membership change message for the multicast tree to a root node of the multicast tree based on detection of a condition and in which the root node of the multicast tree, based on the membership change message, initiates a leaf node discovery process for discovering the leaf nodes of the multicast tree.

公开(公告)号：US20210306257A1

公开(公告)日：2021-09-30

申请号：US16469427

申请日：2018-06-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Pranjal Dutta

IPC: H04L12/721 ,  H04L12/723 ,  H04L12/749 ,  H04L12/707 ,  H04L12/715 ,  H04L12/733

Abstract: Various example embodiments relate generally to supporting flow-specific fast rerouting of source routed packets in communication networks. Various example embodiments for supporting flow-specific fast rerouting of source routed packets may be configured to support flow-specific fast rerouting of source routed packets based on use of various source routing protocols which may be based on various underlying communication protocols. Various example embodiments for supporting flow-specific fast rerouting of source routed packets in communication networks may be configured to support flow-specific fast rerouting of source routed packets by supporting use of a source routed packet including a payload and a header where the header encodes a set of hops of a primary path for the source routed packet and where the header also encodes a set of hops of a protection path configured to protect one of the hops of the primary path for the source routed packet.

公开(公告)号：US10587495B2

公开(公告)日：2020-03-10

申请号：US15927781

申请日：2018-03-21

Applicant: Nokia Solutions and Networks Oy

Inventor： Pranjal Dutta

IPC: H04L12/751 ,  H04L12/715 ,  H04L12/761 ,  H04L29/06

Abstract: A hierarchical domain includes egress routers, an ingress router, set gateway routers, and subdomain gateway routers. The ingress router receives a multicast packet in a flow associated with the egress routers. The ingress router is in a first set of egress routers in a first subdomain of the hierarchical domain. The set gateway routers provide gateways to second sets of the plurality of egress routers in the first subdomain. The subdomain gateway routers provide gateways to second subdomains that includes sets of the plurality of egress routers. The ingress router generates a first copy of the multicast packet for transmission to the first set of egress routers based on a first bitstring, a second copy of the multicast packet for transmission to the set gateway routers based on a second bitstring, and a third copy of the multicast packet to the subdomain gateway routers based on a third bitstring.

公开(公告)号：US20190296999A1

公开(公告)日：2019-09-26

申请号：US15927760

申请日：2018-03-21

Applicant: Nokia Solutions and Networks Oy

Inventor： Pranjal Dutta

IPC: H04L12/715 ,  H04L29/12 ,  H04L12/761

Abstract: A hierarchical domain includes egress routers, an ingress router, set gateway routers, and subdomain gateway routers. The ingress router receives a multicast packet in a flow associated with the egress routers. The ingress router is in a first set of egress routers in a first subdomain of the hierarchical domain. The set gateway routers provide gateways to second sets of the plurality of egress routers in the first subdomain. The subdomain gateway routers provide gateways to second subdomains that includes sets of the plurality of egress routers. The ingress router generates a first copy of the multicast packet for transmission to the first set of egress routers based on a first bitstring, a second copy of the multicast packet for transmission to the set gateway routers based on a second bitstring, and a third copy of the multicast packet to the subdomain gateway routers based on a third bitstring.

公开(公告)号：US20190296922A1

公开(公告)日：2019-09-26

申请号：US15927770

申请日：2018-03-21

Applicant: Nokia Solutions and Networks Oy

Inventor： Pranjal Dutta

IPC: H04L12/18 ,  H04L12/741

Abstract: A hierarchical domain includes egress routers, an ingress router, set gateway routers, and subdomain gateway routers. The ingress router receives a multicast packet in a flow associated with the egress routers. The ingress router is in a first set of egress routers in a first subdomain of the hierarchical domain. The set gateway routers provide gateways to second sets of the plurality of egress routers in the first subdomain. The subdomain gateway routers provide gateways to second subdomains that includes sets of the plurality of egress routers. The ingress router generates a first copy of the multicast packet for transmission to the first set of egress routers based on a first bitstring, a second copy of the multicast packet for transmission to the set gateway routers based on a second bitstring, and a third copy of the multicast packet to the subdomain gateway routers based on a third bitstring.