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QUICK WIRELESS LOSS DETECTION AND RECOVERY IN INFORMATION-CENTRIC NETWORKS WITHOUT EXPLICIT SIGNALING

IP.com Disclosure Number: IPCOM000248355D
Publication Date: 2016-Nov-17
Document File: 4 page(s) / 221K

Publishing Venue

The IP.com Prior Art Database

Related People

Giovanna Carofiglio: AUTHOR [+2]

Abstract

Described herein is a mechanism for quick wireless loss detection and recovery on the last hop without introducing an additional signal, such as an acknowledgment or a negative-acknowledgment. The mechanism benefits from information-centric network (ICN) architectural features.

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QUICK WIRELESS LOSS DETECTION AND RECOVERY IN INFORMATION- CENTRIC NETWORKS WITHOUT EXPLICIT SIGNALING

AUTHORS:

Giovanna Carofiglio
Natalya Rozhnova

CISCO SYSTEMS, INC.

ABSTRACT

    Described herein is a mechanism for quick wireless loss detection and recovery on the last hop without introducing an additional signal, such as an acknowledgment or a negative-acknowledgment. The mechanism benefits from information-centric network (ICN) architectural features.

DETAILED DESCRIPTION

    A wireless networking environment can experience a high packet loss probability due to different channel conditions. Channel losses may be detected on the media access control (MAC) layer of a wireless device or at higher layers. Detection at the MAC layer is performed through acknowledgments, which create additional traffic and unnecessary bandwidth consumption. These acknowledgments may significantly degrade performance, particularly in cases involving low-quality channel conditions.

    At higher layers, all packet losses are detected by default for network congestion and immediately impact the window or sending rate. Moreover, if the losses occur on the last-hop wireless link, it may take a significant amount of time to detect them at the endpoint and perform the necessary retransmissions. This leads to inefficient network resource utilization. In particular, the losses are crucial for inelastic or real-time applications because, in these applications, the packets cannot be recovered. Thus, it is important to quickly detect and recover packet losses in order to improve the quality of service offered to the end users.

Copyright 2016 Cisco Systems, Inc.

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    The mechanism described herein is designed for the last-hop wireless link and configured in a base station (BS) or an access point (AP). Although the term "BS" is used herein for simplicity, the mechanism may be applied to any wireless technology.

    The packet exchange process is illustrated in Figure 1, below. Because one Interest packet corresponds to one Data packet, a consumer should send exactly N Interests in order to download a content containing N Data packets. Accordingly, a producer P cannot send a Data packet before it receives the corresponding Interest. Further, for Data packets transmitted along the link between a BS and P, there is a large probability that the Data packets arrive at the BS in the same order as the previously sent Interests. The BS maintains the order of Interests sent to P, and the Data packet corresponding to the first sent Interest is expected to be received first. Also, any disordering may be easily managed with a special flag.

Figure 1

The normal data reception case is presented in Figure 2, below.

Copyright 2016 Cisco Systems, Inc.

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