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Self-adaptive random access method and system of machine type communication terminal

A machine-type communication and random access technology, applied in wireless communication, electrical components, etc., can solve the problems of collision and low probability of successful access.

Active Publication Date: 2014-07-16
嘉兴格盛智能科技有限公司
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is: in the prior art, when a machine type communication terminal randomly accesses and falls back, a large number of terminals will collide when they re-access, so the probability of successful access is very low

Method used

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  • Self-adaptive random access method and system of machine type communication terminal
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  • Self-adaptive random access method and system of machine type communication terminal

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Embodiment Construction

[0030] Random access is a basic function in wireless communication. Its purpose is to establish a connection between the terminal and the network. There are two modes of random access: contention-based mode and non-contention-based mode. These two modes are applied to different scenarios. The contention-based mode scenarios are: initial access in RRC (Radio Resource Control Protocol) idle state; initial access after wireless link error; and access when there is uplink data transmission in RRC connection state. Non-contention-based initial access application scenarios: in the RRC_CONNECTED state, when there is data transmission; the random access process of the terminal during the handover process. The process of initial random access based on contention system is as follows: figure 1 As shown, there are several steps as follows:

[0031]Step 1: The UE sends a random access preamble (Preamble) request, and the UE selects a preamble with a medium probability from the available ...

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Abstract

The invention discloses a self-adaptive random access method and system of a machine type communication terminal and belongs to the field of mobile communication. According to the method and system, a lead code is mainly sent through the machine type communication terminal, a base station sends a random access response message and makes judgment according to the connected terminal, a BO value is set adaptively based on the number of collision terminals, the collision rate of random re-access is reduced, and the access success rate is increased.

Description

technical field [0001] The invention relates to a machine type communication adaptive random access method and system, belonging to the field of mobile communication. Background technique [0002] The Internet of Things (Internet of Things) is to connect any object with the Internet through radio frequency identification (RFID), infrared sensors, global positioning systems, laser scanners and other information sensing devices according to agreed protocols for information exchange and communication. , to realize a network of intelligent identification, positioning, tracking, monitoring and management of objects. IoT-related technologies have been applied in current mobile communications. The direct result of the development of mobile communication technology is the emergence of a communication system with a more complex structure and more powerful functions. In addition to traditional human-to-human communication, device-to-device communication (M2M) will also develop rapidl...

Claims

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Application Information

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IPC IPC(8): H04W74/08
Inventor 徐静李永忠姚志垒徐森孙莉吴素芹许秋艳
Owner 嘉兴格盛智能科技有限公司
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