Parallel RTS (remote terminal system) processing multiple access method supporting MIMO (multiple input multiple output) in ad hoc network

An access method and network technology, applied in the directions of network traffic/resource management, error prevention/detection using return channels, electrical components, etc. Throughput, avoid conflict, increase the effect of processing and calculation

Inactive Publication Date: 2012-12-05
西安电子科技大学昆山创新研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is, for the technology "PRP-MAC", under the condition that the network scale and the number of nodes sending at the same time increase, that is, under the condition that the number of simultaneously transmitted data streams increases, the CTS grouping and DATA grouping in the network may A conflict occurs and cannot work effectively. An improved parallel RTS processing multiple access protocol is proposed, which is defined as Improved Parallel RTS Processing-MAC, namely IPRP-MAC

Method used

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  • Parallel RTS (remote terminal system) processing multiple access method supporting MIMO (multiple input multiple output) in ad hoc network
  • Parallel RTS (remote terminal system) processing multiple access method supporting MIMO (multiple input multiple output) in ad hoc network
  • Parallel RTS (remote terminal system) processing multiple access method supporting MIMO (multiple input multiple output) in ad hoc network

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Embodiment 1

[0043] see figure 1 , the present invention is a parallel RTS processing multiple access method supporting MIMO in an ad hoc network, which retains the time structure of PRP-MAC, control grouping RTS grouping and ACK grouping, and defines a control grouping time slot as a basic time unit, each control packet is in the minimum backoff slot, which is also called the minimum backoff slot, and randomly accesses the channel on the basis of CSMA / CA. The control packet CTS of the present invention is also of two types, specifically the following two types: one is non-collision CTS-N, namely "CTS-Non collision", and the other is conflict-free CTS-C, namely "CTS-Collision" After the modification of the CTS grouping in the present invention, the carrier sense result can be effectively used to determine the maximum number of data streams that can be transmitted without conflict, and the number of data streams that can be simultaneously transmitted on the network exceeds 2 without calcula...

Embodiment 2

[0046] The parallel RTS processing multiple access method supporting MIMO in the ad hoc network is the same as that in Embodiment 1. All 1-hop adjacent nodes in the network are within the communication range and the 2-hop adjacent nodes are within the range of carrier sensing. Refer to Figure 4 . In the present invention, the CTS-N group is used in the following situation: a node only receives 1 or 2 RTS packets sent to the node, and there is no carrier sense to detect the RTS packets transmitted between other nodes, in this case Next, the CTS-N packet indicates to the sending node that all the number of antennas can be used for data transmission at this time; the CTS-C packet is used in the following situation: if a node not only receives the RTS packet whose destination node is itself, but also receives the RTS packet sent to RTS packets sent by other destination nodes, or only receive RTS packets whose destination node is itself but at the same time the carrier senses RTS ...

Embodiment 3

[0052] The parallel RTS processing multiple access method supporting MIMO in an ad hoc network is the same as that in Embodiment 2, see Figure 10 ,

[0053] The specific signal flow of the present invention is as follows:

[0054] (1) If the sending node U has business to send, it first senses the channel on the carrier, sends an RTS packet to the receiving node V for channel reservation, and waits for the feedback from the receiving node V;

[0055] (2) If the receiving node V only receives one or two RTS packets sent to this node, and at the same time, no carrier senses the RTS packets transmitted between other nodes, in this case, the receiving node V sends Node U replies with a CTS-N packet, indicating that the sending node U can use all the antennas for data transmission at this time;

[0056] (3) If the receiving node V not only receives the RTS packet whose destination node is itself, but also receives the RTS packet sent to other destination nodes, or only receives ...

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Abstract

The invention relates to a parallel RTS (remote terminal system) processing multiple access method supporting MIMO (multiple input multiple output) in an ad hoc network. A PRP-MAC time structure is reserved, two types of a control packet CTS are interference-free CTS-N and interference CTS-C, the maximum quantity of tolerable transmission data streams can be calculated without any algorithm, and when the quantity of the simultaneous transmission data streams exceeds 2 in the network, a carrier sensing result is utilized to judge the maximum quantity of the transmission data streams under the premise of not generating the interference in a period of waiting for the RTS packet. During the practical application, the invention is simpler and easier to operate than the PRP-MAC protocol, and solves the technical problems that the quantity of transmitting nodes is increased and the nodes can not normally receive the data streams because a CTS packet collides with a DATA packet when the quantity of the simultaneous transmission data streams exceeds 2 so as to cause the throughout of the network is lowered and further the system performance is reduced. The invention can better work in the network under various conditions. With the increase of the network size, the transmission efficiency of the IPRP-MAC protocol is further improved.

Description

technical field [0001] The invention belongs to the technical field of network communication, and mainly relates to the field of multiple-input multiple-output (MIMO) technology and wireless multi-hop self-organizing network multiple-access access, specifically a parallel RTS processing multiple-access access in a new ad hoc network supporting MIMO input method. Background technique [0002] With the rapid development of wireless communication technology, mobile ad hoc network (Mobile Ad hoc NETwork, MANET) is considered to be one of the most critical technologies. Because of its node-based distributed control and does not require any infrastructure, MANET has received great attention and application. In addition, in order to achieve the purpose of high-speed communication in the MANET network, MIMO technology has also received more and more attention and applications, and many multiple access protocols suitable for MIMO have also appeared, see IEEE Globecom 2004, vol.5, pp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/06H04W74/08H04L1/16
Inventor 李长乐王夏冰蔡雪莲李建东张阳陈婷陈丹
Owner 西安电子科技大学昆山创新研究院
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