Intelligent Random Access Method in Satellite Internet of Things
A random access and Internet of Things technology, applied in the field of communication, can solve problems such as inability to adapt to large delays in satellite networks, and achieve the effects of improving system throughput, improving utilization, and eliminating randomness
Active Publication Date: 2021-06-25
XIDIAN UNIV
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The purpose of the present invention is to propose an intelligent random access method in the satellite Internet of Things, so as to solve the problem of large time delay that the existing technology cannot adapt to the satellite network, and further improve the system throughput
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0048] Attached below figure 1 The present invention is further described.
[0049] refer to figure 1 , the implementation steps of the present invention are as follows:
[0050] Step 1, perform parity framing on the data frame, and the user selects a time slot to send two copies of itself:
[0051] (1a) Divide the data frame into an odd frame and an even frame according to the sequence number, and the satellite end broadcasts the sequence number information of the data frame to each user;
[0052] Depend on figure 2 It can be seen from the delay diagram of the satellite network given, assuming that the transmission delay of each frame is T F , the satellite forwards the signal to the gateway after receiving the signal, the gateway processes the signal and feeds back the receiving situation to the satellite, and then the satellite broadcasts the transmission result to the accessing users through the broadcast channel. Assume that the uplink propagation delay from the bas...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an intelligent random access method in the satellite internet of things, which mainly solves the problems of low throughput and low time slot utilization rate in the prior art under large-capacity load. The implementation plan is: 1. Divide the data frame into odd-even frames, and the user selects a time slot to send two copies of itself to the satellite, and the satellite broadcasts the transmission result back to the user; 2. The user updates the Q evaluation value of each time slot according to the feedback result , all users choose the time slot transmission copy with a large Q evaluation value; 3. Determine whether the system can converge through load estimation: if it converges, then iterate 1 and 2 until all users transmit copies in the dedicated time slot; access control based on the access probability. The invention reduces the probability of data packet collision, improves the utilization rate of time slots, adapts to the large time delay of the satellite network, improves the system throughput, and can In the satellite network of the Internet of Things business.
Description
technical field [0001] The invention belongs to the field of communication technology, and further relates to an intelligent random access method, which can be used in a satellite network with Internet of Things services, so that an Internet of Things terminal on the ground can form a connection with the satellite network. Background technique [0002] With the rapid development of satellite communication, satellite Internet of Things communication technology has become a research hotspot in recent years. In the satellite network with Internet of Things business, the number of nodes is massive, generally above 10K, and the satellite network has a large transmission delay, which cannot feedback information in time, which makes the matching between the satellite network and the Internet of Things business wireless random Access system research is extremely challenging. [0003] High-throughput medium access control (MAC) layer random access protocol is an effective way to imp...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04B7/185
CPCH04B7/1851H04W74/085
Inventor 任光亮李洋余砚文
Owner XIDIAN UNIV