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Alarm information transmission method for conflict-free random access

A technology of information transmission and random access, applied in wireless communication, advanced technology, climate sustainability, etc., can solve the problem of long delay in the transmission of alarm information, and achieve fast connection, avoid reconnection, and reduce transmission delay. Effect

Pending Publication Date: 2022-06-03
SUN YAT SEN UNIV SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defect of large transmission delay caused by conflicts between alarm information when multiple user terminals simultaneously transmit alarm information in the prior art, the present invention provides a conflict-free random access alarm information transmission method to realize low-latency alarm , to quickly respond to emergencies

Method used

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  • Alarm information transmission method for conflict-free random access
  • Alarm information transmission method for conflict-free random access
  • Alarm information transmission method for conflict-free random access

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0043] This embodiment provides a conflict-free random access alarm information transmission method, such as figure 2 shown, including:

[0044] S1: The cellular system uses the preamble to construct a preamble sequence with a length of X; the cellular system includes M preambles, N detectors and a base station; the number of alarm event levels of each detector is T;

[0045] S2: Establish the mapping relationship between the detector serial number and its alarm event level and the preamble sequence, and transmit the mapping relationship to each detector;

[0046] S3: When the detector detects an alarm event, it records the alarm event level, and randomly selects a preamble to send to the base station;

[0047] S4: After receiving the preamble, the base station sends the first response information to the detector, and authorizes the first uplink time-frequency resource block in the first response information;

[0048] S5: After receiving the first response information, the ...

Embodiment 2

[0054] This embodiment provides a conflict-free random access alarm information transmission method, including:

[0055] S1: The cellular system uses the preamble to construct a preamble sequence with a length of X; the cellular system includes M preambles, N detectors and a base station; the number of alarm event levels of each detector is T;

[0056] The M preambles are orthogonal to each other. Since the preambles are orthogonal to each other, different preamble sequences will not collide, so that collisions can be avoided, and further data collisions will not occur in step S7.

[0057] There is a constraint relationship between the detector, the preamble, the alarm event level and the length of the preamble sequence, and the constraint relationship is:

[0058] M X ≥NT

[0059] In the formula, M represents the number of preambles, X represents the length of the preamble sequence, N represents the number of detectors, and T represents the number of alarm event levels of t...

Embodiment 3

[0075] This embodiment uses specific data to explain an alarm information transmission method for random access without conflict. There is a base station in a cellular system, two orthogonal preambles m 1 , m 2 , 4 detectors, the number of alarm event levels of each detector is 2, and the length of the constructed preamble sequence is 3, that is, M=2, X=3, N=4, T=2; using two orthogonal The preamble constructs a preamble sequence of length 3, then there are 2 3 There are 4 detectors, the number of alarm event levels of each detector is 2, there are 4*2 alarm information, and the preamble sequence and the alarm information are in one-to-one correspondence, the corresponding relationship is as follows Figure 5 As shown, taking the emergency situation of detector 1 and 1 as an example: f(1,1)={m 1 , m 2 , m 3 }, at this time m 1 , m 2 , m 3 both m 1 , then f(1, 1)={m 1 , m 1 , m 1 }.

[0076] In the specific implementation process, the detector detects the alarm even...

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Abstract

The invention discloses an alarm information transmission method for conflict-free random access, which relates to the technical field of wireless communication, and comprises the following steps of: establishing a cellular system comprising M lead codes, N detectors and a base station, and constructing a lead code sequence with the length of X by using the lead codes; establishing a mapping relationship between the detector serial number and the alarm event level thereof and the lead code sequence; a detector detects an alarm event, records the level of the alarm event, randomly selects a lead code and sends the lead code to a base station, and the base station responds for the first time and authorizes a first uplink time-frequency resource block; the detector sends a request signal to the base station through the first uplink time-frequency resource block, and the base station responds for the second time and authorizes the second uplink time-frequency resource block; and the detector sends the lead code sequence to the base station through the second uplink time-frequency resource block, and the base station replies to send alarm event receiving confirmation information. According to the invention, the transmission time delay of the alarm information can be greatly reduced, low-delay alarm is realized, and a response can be quickly made to an emergency situation.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more particularly, to a method for transmitting alarm information for random access without conflict. Background technique [0002] Alarm systems, such as earthquake early warning and fire early warning, are sensitive to information transmission delays. The remote server needs to quickly know whether an emergency occurs or not, as well as the level of the emergency. secondary damage. Therefore, low-latency alarm information transmission is a must for alarm systems. Because of its wide coverage, cellular networks have become the primary means of supporting communications for alarm systems. However, the cellular network adopts a connection-based random access method, that is, the user terminal can transmit data only after completing the random access procedure and establishing a connection with the base station. like figure 1 As shown, the connection-based random acce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/90H04W72/04H04W74/08
CPCH04W4/90H04W72/0446H04W72/0453H04W74/085H04W72/21Y02D30/70
Inventor 詹文梁译文孙兴华
Owner SUN YAT SEN UNIV SHENZHEN