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Cooperation rate self-adaptive transmission method suitable for an orthogonal frequency division multiplexing-ultra-wide bandwidth (OFDM-UWB) system

An OFDM-UWB, rate self-adaptive technology, applied in network traffic/resource management, electrical components, wireless communication, etc., can solve problems such as inapplicable DRP access protocol, and achieve the effect of increasing service rate requirements

Inactive Publication Date: 2014-04-16
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current research mainly focuses on the rate adaptation scheme under the contention-based channel access scheme, which is not applicable to the reservation-based DRP access protocol in the ECMA standard

Method used

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  • Cooperation rate self-adaptive transmission method suitable for an orthogonal frequency division multiplexing-ultra-wide bandwidth (OFDM-UWB) system
  • Cooperation rate self-adaptive transmission method suitable for an orthogonal frequency division multiplexing-ultra-wide bandwidth (OFDM-UWB) system
  • Cooperation rate self-adaptive transmission method suitable for an orthogonal frequency division multiplexing-ultra-wide bandwidth (OFDM-UWB) system

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Embodiment 1

[0029] Embodiment 1: as image 3, there are four devices Dev1, Dev2, Dev3, Dev4 in the simulation scene of the embodiment, and the coordinates are respectively: (1.5,-1,5), (0,0), (1,2), (3,0), The coordinate unit is meters, where Dev1 is the source device, Dev4 is the destination device, Dev2 and Dev3 are neighbor devices, the source device Dev1 moves horizontally to the left at a speed of 1m / s, and each superframe Dev1 can reserve 50 MAS digits, the upper layer The transmission rate required by the business is 200Mb / s, and the frame error rate is not higher than 8%.

[0030] In the simulation, the CM1 model of ultra-wideband is used, and the noise power is -80dBm. The model of channel gain and path loss in the ultra-wideband system is H=H 0 / D γ , D is the distance between two points, γ is the power attenuation index, γ=4.3 is taken in the CM1 model, Indicates the reference power gain when the distance D=1m, A 0 =20lg(4πf c / c)(dB) represents the reference path loss wh...

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Abstract

The invention provides a cooperation rate self-adaptive transmission method suitable for an orthogonal frequency division multiplexing-ultra-wide bandwidth (OFDM-UWB) system. The cooperation rate self-adaptive transmission method comprises the following steps: 1) source equipment sends an own beacon frame at a beacon period of each superframe and monitors beacons of neighbors, so as to obtain channel information with the neighbors; 2) according to the requirements for the data rate and the frame error rate of an upper-layer business type, the source equipment calculates whether the requirements can be satisfied or not, and if the requirements can be satisfied, direct transmission is selected, otherwise the source equipment asks neighbor equipment for cooperation; 3) after the source equipment asks for cooperation, the neighbor equipment calculates the throughput capable of being obtained if the neighbor equipment participates in the cooperation, and if the throughput capable of being obtained is larger than the throughput of direct transmission, the neighbor equipment publishes cooperation information in the self beacon frame; and 4) each equipment monitors the cooperation information of other equipment and the equipment obtaining the maximum throughput becomes cooperation equipment, and if no equipment satisfy the condition, direct transmission is still used. The cooperation rate self-adaptive transmission method has the characteristic that the transmission rate is dynamically adjusted, resources of neighbor equipment are dynamically utilized and the system performance is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication resource management, relates to ultra-wideband UWB communication technology, and is a cooperative rate adaptive transmission method suitable for OFDM-UWB systems. Background technique [0002] Ultra-wideband UWB is a short-distance wireless communication technology, which has the characteristics of high data rate, low power spectral density, strong anti-multipath ability and high positioning accuracy. The European ECMA standardization organization has formulated the MAC standard ECMA368 for the physical layer and media access layer of high-speed ultra-wideband, in which the MAC layer is responsible for coordinating multiple users accessing the same wireless medium. ECMA368 standard specifies two channel access protocols, Distributed Reservation Protocol DRP and Priority Competitive Access PCA. The invention is a cooperative rate adaptation scheme under the DRP protocol. [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/22
Inventor 王捷曹凯蒋良成杜永强韩乔乔许斌徐铭宋建永陈佰儒
Owner SOUTHEAST UNIV
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