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Packet loss

About: Packet loss is a research topic. Over the lifetime, 21235 publications have been published within this topic receiving 302453 citations.


Papers
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Proceedings ArticleDOI
21 Oct 2019
TL;DR: An overview of grant-free random access in 5G New Radio is provided, and two reliability-enhancing solutions are presented that result in significant performance gains, in terms of reliability as well as resource efficiency.
Abstract: Ultra-reliable low latency communication requires innovative resource management solutions that can guarantee high reliability at low latency. Grant-free random access, where channel resources are accessed without undergoing assignment through a handshake process, is proposed in 5G New Radio as an important latency reducing solution. However, this comes at an increased likelihood of collisions resulting from uncoordinated channel access. Novel reliability enhancement techniques are therefore needed. This article provides an overview of grant-free random access in 5G New Radio focusing on the ultra-reliable low latency communication service class, and presents two reliability-enhancing solutions. The first proposes retransmissions over shared resources, whereas the second proposal incorporates grant-free transmission with non-orthogonal multiple access where overlapping transmissions are resolved through the use of advanced receivers. Both proposed solutions result in significant performance gains, in terms of reliability as well as resource efficiency. For example, the proposed non-orthogonal multiple access scheme can support a normalized load of more than 1.5 users/slot at packet loss rates of ~ 10−5 a significant improvement over conventional grant-free schemes like slotted-ALOHA.

95 citations

Journal ArticleDOI
TL;DR: A novel energy-efficient adaptive power control (APC) algorithm is proposed that adaptively adjusts transmission power (TP) level based on the feedback from base station that achieves significant higher energy savings than Monte Carlo simulations in MATLAB.
Abstract: An important constraint in wireless body area network (WBAN) is to maximise the energy-efficiency of wearable devices due to their limited size and light weight. Two experimental scenarios; ‘right wrist to right hip’ and ‘chest to right hip’ with body posture of walking are considered. It is analyzed through extensive real-time data sets that due to large temporal variations in the wireless channel, a constant transmission power and a typical conventional transmission power control (TPC) methods are not suitable choices for WBAN. To overcome these problems a novel energy-efficient adaptive power control (APC) algorithm is proposed that adaptively adjusts transmission power (TP) level based on the feedback from base station. The main advantages of the proposed algorithm are saving more energy with acceptable packet loss ratio (PLR) and lower complexity in implementation of desired tradeoff between energy savings and link reliability. We adapt, optimise and theoretically analyse the required parameters to enhance the system performance. The proposed algorithm sequentially achieves significant higher energy savings of 40.9%, which is demonstrated by Monte Carlo simulations in MATLAB. However, the only limitation of proposed algorithm is a slightly higher PLR in comparison to conventional TPC such as Gao's and Xiao's methods.

95 citations

Journal ArticleDOI
28 Aug 2000
TL;DR: In writing networking code, one is often faced with the task of interpreting a raw buffer according to a standardized packet format, for example, when monitoring network traffic for specific kinds of packets, or when unmarshaling an incoming packet for protocol processing.
Abstract: In writing networking code, one is often faced with the task of interpreting a raw buffer according to a standardized packet format. This is needed, for example, when monitoring network traffic for specific kinds of packets, or when unmarshaling an incoming packet for protocol processing. In such cases, a programmer typically writes C code that understands the grammar of a packet and that also performs any necessary byte-order and alignment adjustments. Because of the complexity of certain protocol formats, and because of the low-level of programming involved, writing such code is usually a cumbersome and error-prone process. Furthermore, code written in this style loses the domain-specific information, viz. the packet format, in its details, making it difficult to maintain.

94 citations

Proceedings ArticleDOI
07 May 1996
TL;DR: It is shown that it is only required to keep one copy of the coded data at its highest possible quality and the transcoder is also capable of fast response to network demands to prevent packet loss.
Abstract: It is expected that most of the video services will be based on the MPEG2 standard and many of them using recorded streams. When compressed video is recorded, the characteristics of the channel through which it will be transmitted are assumed to be known beforehand. Therefore a great lack of flexibility arises in transmission of these streams when channels of diverse characteristics are used. If the same video programme is to be simultaneously distributed to several users through channels with different capacities, the service provider needs to keep several copies of that programme, each one encoded according to the corresponding channel characteristics. We show that it is only required to keep one copy of the coded data at its highest possible quality. Transcoding the main stream to lower rates is achieved with minimum delay. Therefore the transcoder is also capable of fast response to network demands to prevent packet loss.

94 citations

Patent
14 Mar 1995
TL;DR: In this paper, a method and apparatus for transmitting data in a packet radio communication system having data sources, destinations and intermediate repeaters is described, where a repeat count in the protocol is decremented each time a packet is retransmitted, until the repeat count reaches zero, at which time the packet is discarded.
Abstract: A method and apparatus for transmitting data in a packet radio communication system having data sources, destinations and intermediate repeaters. According to a packet protocol, a repeat count in the protocol is decremented each time a packet is retransmitted, until the repeat count reaches zero, at which time the packet is discarded. According to another packet protocol, a sequence index is used to prevent duplicate packets from being received by requiring that the sequence number fall within a sequence number window at each device, which is incremented each time a packet is received. The sequence number is also used to cause the retransmission of packets which are lost, at which time the sequence number windows in the devices which are affected are reset to allow transmission of the lost packet.

94 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023133
2022325
2021694
2020846
20191,033
2018993