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Communications system and method

A communication system and algorithm technology, applied in the field of communication systems, can solve problems such as must be resent, the packet is lost, etc.

Inactive Publication Date: 2009-08-12
ITI SCOTLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In existing communication systems, an incoming data packet is rejected if it contains any errors, so that the packet is lost and must be resent

Method used

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  • Communications system and method
  • Communications system and method
  • Communications system and method

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Embodiment Construction

[0026] Note that the preferred embodiments described below relate to ultra-wideband communication systems. However, the invention can also be used in other packet-based communication systems.

[0027] As described above, figure 2 An exemplary communication system for transmitting data packets from transmitter 22 to receiver 24 over channels 26 and 27 is shown.

[0028] In the context of UWB systems, physical layer service data units (ie PHY Service Data Units - PSDUs) are encoded and sent on a physical channel between devices. Media Access Controller Service Data Units (ie MAC Service Data Units - MDSUs) are transferred between MAC entities in PSDUs. Each MSDU has a delivery identification (Id) in the frame control field of the MSDU header. The delivery Id is used to define user priority (for asynchronous data transfer using PCA scheme) or flow index (for synchronous data transfer using DRP scheme).

[0029] If one considers the OSI layer model and the entity known as the...

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Abstract

A method for transmitting data using data packets includes dividing a data portion of the data packet into two or more data segments, each having a corresponding check portion. The data packet may also be communicated over two or more logical communication channels. The order of data portions in one communication channel may differ from the order of data portions in a second communication channel. Identical or different check portions may be assigned to respective data portions.

Description

technical field [0001] The present application relates to communication systems and methods, and more particularly, to packet-based communication systems and methods, such as ultra-wideband communication systems and methods. Background technique [0002] UWB is a radio technology that transmits digital data across a very wide frequency range of 3.1GHz-10.6GHz. By spreading the RF energy across a wide bandwidth, the transmitted signal is virtually undetectable by conventional frequency-selective RF techniques. However, low transmission energy typically limits communication distances to less than 10 to 15 meters. [0003] There are two schemes for implementing UWB: a time-domain scheme, which constructs signals with pulse waveforms characteristic of UWB; and a frequency-domain modulation scheme, which uses traditional FFT-based Orthogonal Frequency Division Multiplexing (OFDM) over multiple (frequency) bands , giving MB-OFDM. Both UWB schemes produce spectral components cov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/02H04B1/69H04B1/713
CPCH04L1/22H04L1/08H04L1/0084H04L1/0061H04L25/14H04L12/28H04L1/00H04B1/69
Inventor 亚历山大·韦尔马克·诺里斯
Owner ITI SCOTLAND