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Statistical priority multiple access method for a high time-sensitive service

A technology of access method and priority, applied in transmission systems, transmission monitoring, electrical components, etc., can solve the problem of not being able to know technical details further

Inactive Publication Date: 2019-05-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Due to the secrecy of military technology, although researchers can learn some characteristics and performance indicators of TTNT from public documents, they cannot further know its complete technical details

Method used

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  • Statistical priority multiple access method for a high time-sensitive service
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  • Statistical priority multiple access method for a high time-sensitive service

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Embodiment Construction

[0019] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0020] In the following description, this specification abbreviates the statistical priority multiple access method for high time-sensitive services proposed by the present invention as RT-MAC (Real-time Medium Access Control). RT-MAC first set the following network operating conditions:

[0021] 1. The MAC layer adopts data frame fragmentation technology, and a single data frame is divided into q subframes and sent on q pulses respectively;

[0022] 2. The physical layer provides frequency and time hopping capabilities. Frequency hopping and time hopping patterns have been designed for network nodes in advance. The number of pulses in each sequence in the pattern is q, and the sending frequency of each pulse can be from Nq carrier frequencies Randomly selected among

[0023] 3. The network node works in half-duplex mode, that is, at the same time, the node can onl...

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Abstract

The invention discloses a statistical priority multiple access method for a high time-sensitive service. According to the method, it is assumed that a physical layer adopts frequency hopping and timehopping communication technologies, and frequency hopping and time hopping patterns are distributed to nodes firstly according to the network scale and service transmission requirements; The service load value of the logic channel corresponding to the frequency hopping and time hopping pattern is obtained by detecting the occupation condition of the pulse time slot, and the transmission thresholdvalues of various priority services are calculated by adopting a filling test method. And at the beginning of each network time frame, the sending node sequentially checks whether to-be-sent data packets exist in the network layer queue according to the priority order, and compares the service load values of the frequency hopping and time hopping patterns of the receiving nodes of the data packetswith the sending threshold value of the priority service. And if the service load value is smaller than the sending threshold value, the node can send the data packet with the priority according to the frequency hopping and time hopping pattern of the receiving node. A simulation result in an EXata network simulation environment proves that the method can reliably support transmission of the high-time-sensitivity service.

Description

Technical field [0001] The invention belongs to the field of wireless networks, and particularly relates to a statistical priority multiple access method for high time-sensitive services. Background technique [0002] The Tactical Targeting Network Technology (TTNT) system, as an advanced tactical data link system of the US military, can perform precise strikes on short-lived moving targets and truly realize the "discover and destroy" capability. The single-hop distance of the TTNT network is about 185.2 kilometers. The burst transmission delay requirement of 2ms is equivalent to that of the developing 5G communication technology. The high-speed broadband and IP-based ad hoc networking mode can give full play to distributed network operations. efficacy. In fact, TTNT not only includes the physical layer and data link layer design, it already has the all-IP adhoc networking capability, which can be called a low-latency, instant self-organizing IP network. [0003] The Medium Acces...

Claims

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Application Information

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IPC IPC(8): H04W24/02H04W24/06H04B1/713H04B17/309H04B17/382
Inventor 李志林雷磊沈高青毕研涛蔡圣所张莉涓袁代数赵楠葛以震
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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