Reliable transport protocol and hardware architecture for datacenter networking

Patent metadata

Field	Value
Publication number	US-12132800-B2
Application number	US-202318367679-A
Country	US
Kind code	B2
Filing date	Sep 13, 2023
Priority date	Dec 12, 2019
Publication date	Oct 29, 2024
Grant date	Oct 29, 2024

Abstract

A communication technology that provides for handling of failed packet transmissions to reduce retransmission attempts and uses resynchronization to prevent tearing down of connections. Thereby, providing for more resilient connections. In an implementation, an initiator entity may determine that a negative acknowledgment indicates that an operation for a particular packet is completed in error by a target entity, and transmit to the target entity a resynchronization packet without tearing down the connection.

First claim

The invention claimed is:

1. A method, comprising:
transmitting, by an initiator entity to a target entity over a connection, a plurality of packets;
determining, by the initiator entity, that neither an acknowledgment nor a negative acknowledgment has been received in response to a particular packet of the plurality of packets within a predetermined period of time;
retransmitting, by the initiator entity to the target entity based on the determination, the particular packet;
receiving, by the initiator entity from the target entity in response to the retransmission, a negative acknowledgement;
determining, by the initiator entity based on the negative acknowledgment, whether to wait for an acknowledgment for the particular packet or to resynchronize;
determining, by the initiator entity, that the negative acknowledgment indicates that operation for the particular packet is completed in error by the target entity; and
transmitting, by the initiator entity to the target entity, a resynchronization packet without tearing down the connection.

2. The method of claim 1 , further comprising:
receiving, by the initiator entity from the target entity, an acknowledgment in response to the resynchronization packet;
transmitting, by the initiator entity, a next plurality of packets in response to the acknowledgment to the resynchronization packet.

3. The method of claim 1 , wherein the plurality of packets are transmitted according to requests from an upper layer protocol of the initiator entity, and the retransmission of the particular packet is performed by a reliable transport protocol layer of the initiator entity.

Assignees

• Google Llc

Inventors

• Wang Weihuang
• Chandra Prashant
• Vaduvatha Srinivas

Classifications

• H04L67/55 Primary

  Push-based network services · CPC title

• H04L1/1832

  Details of sliding window management · CPC title

• H04L67/025 Primary

  for remote control or remote monitoring of applications · CPC title

• H04L67/14

  Session management (for real-time applications in data packet communications networks H04L65/1066) · CPC title

• H04L67/1095

  Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes · CPC title