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Wireless media access control method in ultra-narrow-band communication mode

A communication mode and wireless media technology, applied in the field of wireless communication, to achieve high spectral efficiency, reduce inter-symbol interference, and improve burst communication capabilities

Inactive Publication Date: 2013-09-25
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to multiple iterations of the WSA algorithm, the optimal SO / BO value and GTS allocation scheme can be determined, but it is only applicable to periodic data and the time delay requirement has been given quantitatively. The algorithm needs multiple iterations, and the complexity is relatively high. high

Method used

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  • Wireless media access control method in ultra-narrow-band communication mode
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Embodiment 1

[0095] The performance improvement simulation of the present invention in the CAP stage is realized by adopting OPNET network simulation software. The simulation parameters of the original standard and the present invention are almost the same, and both use a star network topology, including a coordinator and 15 nodes. The specific parameters are shown in Table 8.

[0096]

[0097] In this embodiment, the rate of the physical layer is only doubled, which is set to 500 kbps. Of course, at a higher rate, the performance improvement is more obvious. The simulation results are shown in Figure 7. Indicate the change of network load with packet sending interval, and measure the CAP delay times, average energy consumption, throughput and end-to-end delay performance of network nodes. The main reasons that limit the performance of the CAP stage are the contention access delay and the number of CAP sending delays. Figure 7(a) shows how the number of delays sent by a node in the C...

Embodiment 2

[0099] The OPNET network simulation software is used to realize the performance improvement simulation of the present invention in the CFP stage. literature[ 15 ] Carried out the throughput and delay performance simulation of the original standard GTS mechanism, and came to the conclusion that the best throughput and delay performance can be provided when SO=BO=2, so when simulating the performance of the original standard CFP stage, the table 9 is used parameters to maximize the original standard performance. In addition, in order to reflect that the present invention has good dynamic adaptive transmission capability for both periodic data and bursty data, the MSDU packet size is set to be evenly distributed within 1~912bit, where 912bit is the maximum MSDU value specified by the standard; The number of nodes applying for GTS at the same time is set to 15 to reflect that the present invention breaks through the limitation of 7 GTSs and improves the performance of network thr...

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Abstract

The invention discloses a wireless media access control method in an ultra-narrow-band communication mode. The method including the steps of adding an ultra-narrow-band efficient modulation mode on a physical layer according to an existing wireless personal area network standard, providing four different speeds, effectively improving spectral efficiency, dividing a media access control layer into a CAP stage and a CFP stage, and channel access control methods are adopted respectively at the CAP stage and the CFP stage. According to a GTS distribution scheduling protocol based on EBPSK, the GTS can be distributed and scheduled according to needs by using a method based on speed priority, flexibility of the GTS mechanism is greatly improved, the network throughput and delayed performance at the CFP stage are greatly improved, and energy consumption at the CFP stage is reduced. A simulation result shows that the wireless media access control method can support application scenarios with high energy efficiency, high capacity and low time delay on the condition that node intensive deployment is supported.

Description

field of invention [0001] The invention relates to the field of wireless communication, in particular to a wireless medium access control method in an ultra-narrowband communication mode. Background of the invention [0002] The Low-Rate Wireless Personal Area Network (LR-WPAN) standard specification developed by the IEEE 802.15.4 working group aims to provide a low-speed, low-complexity, low-power consumption and short-distance transmission characteristics Wireless personal communication solutions for low-speed data transmission between fixed, portable or mobile devices. Due to its low implementation cost, low complexity, and low power consumption (battery life of several months to years), it has become the mainstream standard for Wireless Sensor Networks (WSNs). [0003] The latest version of the IEEE Std 802.15.4-2011 standard document "Low-Rate Wireless Personal Area Networks (LR-WPANs) [S]. IEEE Std 802.15.4-2011 (Revision of IEEE Std 802.15.4-2006) released in 2011 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04W84/18H04L27/18
CPCY02D30/70
Inventor 徐平平程梦莉苏德荣聂晴吴琼
Owner SOUTHEAST UNIV
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