H-ARQI type link transmission method based on bitmap feedback

A technology for link transmission and frame transmission, which is applied in transmission systems, digital transmission systems, and error prevention/detection using return channels. The effect of improving system throughput and reducing the number of frame retransmissions

Inactive Publication Date: 2014-01-08
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the technical solution disclosed in this patent document is that no channel coding is added to the communication system, and when the signal-to-noise ratio is low, the frame retransmission rate is high and the throughput is limited
In addition, its adaptive variable speed threshold is determined by the amount of data in the temporary storage area at the receiving end, ignoring the limitation of the transmission rate caused by meteor burst channel deterioration, which can easily lead to an increase in the number of retransmissions in the case of poor channels

Method used

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  • H-ARQI type link transmission method based on bitmap feedback
  • H-ARQI type link transmission method based on bitmap feedback
  • H-ARQI type link transmission method based on bitmap feedback

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Such as image 3 As shown, an H-ARQI link transmission method based on bitmap feedback, on the link layer, the sending end includes a ring buffer, a parallel sending buffer and a framing module; the receiving end includes a receiving temporary storage area and a parallel receive buffer;

[0065] The sending end injects the information output by the upper-layer network port into the ring buffer, and the ring buffer flattens the data in the L pipelines of the parallel sending buffer in the format of data packets. There are L transmission frames in the framing module, and the parallel sending buffer The pipes in the area correspond to the transmission frames in the framing module one by one, and each pipe and the corresponding transmission frame are numbered with the same number;

[0066] In the framing module, each transmission frame determines the coding rate and coding method at this time according to the feedback information of the feedback frame received in the tempo...

Embodiment 2

[0105] Step 1, the sender initializes.

[0106] Define 3 structures, define an array in each structure to open up a section of data space, respectively for the ring buffer, L=16 pipelines in the parallel sending buffer, and 16 frames in the framing module . And the 16 pipes are respectively numbered as 1, 2...16. The 16 frames in the framing module are also numbered 1, 2...16 accordingly. .

[0107] Step 2, the ring buffer receives the upper layer network port data.

[0108] There are three pointers in this area: Buf points to the first address of the buffer, p1 is used to put data into the ring buffer, and p2 is used to fetch data from the ring buffer, such as Figure 5 shown.

[0109] Step 3, flatten the data in L=16 pipelines in the parallel sending buffer in units of packets.

[0110] Set each packet to num_byte=20 bytes (the value of this parameter is shown in Table 1), and the ring buffer will flatten the packets to the 16 pipelines of the parallel sending buffer i...

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Abstract

The invention discloses an H-ARQI type link transmission method based on bitmap feedback. On a link layer, a sending end comprises a circular buffer area, a parallel sending buffer area and a framing module; a receiving end comprises a reception temporary storage area and a parallel reception buffer area, the sending end injects information output out of an upper-layer internet access into the circular buffer area, and the circular buffer area horizontally lays data into L pipelines of the parallel sending buffer area in a data package mode; the reception temporary storage area of the receiving end is also composed of L pipelines; at the receiving end, if information in a transmission frame is verified correct through channel decoding and CRC, data are transmitted upwards to the corresponding pipelines of the parallel reception buffer area, and if not, the transmission frame is transmitted again. The parallel reception buffer area transmits the data to the upper-layer internet access. The H-ARQI type link transmission method based on bitmap feedback can improve throughput rate of a system and meet the requirement that a burst channel is used for achieving efficient communication.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to an H-ARQI link transmission method based on bitmap feedback. Background technique [0002] Meteor trail communication (MBC) uses meteor ionization trails to reflect and scatter VHF radio waves for communication. This communication method has the advantages of good confidentiality, strong anti-interference ability, large coverage, good communication stability, low equipment cost and maintenance cost. However, burst communication is intermittent and non-real-time, and the data throughput rate of meteor trail communication is not high under burst communication. [0003] At present, the link layer of the burst communication system mainly adopts hybrid automatic retransmission technology (H-ARQI type). The H-ARQI type is a combination of forward error control (FEC) and automatic retransmission request (ARQ), which can achieve much higher reliability than pure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/00
Inventor 毛杰高延河李文辉孙艳宋培任超
Owner STATE GRID CORP OF CHINA
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