A method for mtc equipment to randomly access cellular networks

Abstract

The invention discloses a method for MTC devices to have access to a cellular network at random. The problem of network congestion caused by random accessing of the multiple MTC devices in a current cellular system is solved. The method includes the steps that the MTC devices in a cell are grouped, the random accessing process is divided into a local area competition sub-process and a wide area accessing sub-process, each MTC device can send signals in two power levels, only local areas can be reached under low-power-level signals, a base station can be reached under high-power-level signals, the MTC devices firstly send precursor signals with low power in the local areas, namely the local area competition sub-process is executed, and if MTC devices win in the local area competition, the precursor signals are sent in a wide area to the base station with the high power level to build RRC connection with the base station. By means of the technical scheme, accessing delay for the MTC devices to have access to the cellular network can be shortened, and the using rate of radio resources in the cellular system is improved.

Description

technical field [0001] The invention belongs to the communication field, and relates to a method for MTC equipment to randomly access a cellular network. Background technique [0002] MTC (Machine-Type Communications, machine communication) refers to a machine device sending data to another machine device. MTC can connect all devices capable of communication to the network, and it will have a wide range of applications in the future Internet of Things. Unlike H2H communication, MTC communication requires fewer people to participate, and most tasks are automated by the machine itself. Finish. For example, a smart meter can automatically report the user's electricity consumption, and in intelligent transportation, it can observe the vehicle flow in real time. With the deployment of 4G network, it will provide higher bandwidth, which makes it possible for MTC to transmit data through cellular network. In the future, MTC equipment will be favored by more and more communication...

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The present invention provides a method to solve the problem of wireless access network and core network congestion caused by a large number of equipment accessing the base station at the same time in cellular machine communication, which reduces the collision rate when equipment randomly accesses the base station, and improves cellular The resource utilization in the system enables the MTC device to obtain more wireless resources far away from itself during local area competition. The method for the MTC device to randomly access the cellular network

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