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A random access method and a system for realizing random access

A technology of random access and media access layer, which is applied in the field of communication and can solve the problems of inability to feedback random access back-off time from MTC devices, inability to obtain back-off time, and inability to solve network congestion of MTC devices.

Inactive Publication Date: 2011-12-21
ZTE CORP
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  • Claims
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AI Technical Summary

Problems solved by technology

The backoff time carried in the same RAR MAC PDU for random access responses sent by different terminals is also the same, and H2H terminals and MTC devices cannot obtain different backoff times
Therefore, in the prior art, it is impossible to feed back different random access back-off times for H2H terminals and MTC devices, so that it is impossible to solve the network congestion caused by MTC devices during the random access process

Method used

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  • A random access method and a system for realizing random access
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  • A random access method and a system for realizing random access

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Embodiment Construction

[0058] When a machine-type communication device (ME) randomly accesses the network, if network congestion causes the ME to fail to access, the ME needs to re-connect to the network. At this time, the ME needs a longer backoff than the H2H terminal (ordinary terminal). time. However, when the ME needs to quickly access the network, or when the access priority of the ME is higher than that of the H2H terminal, the ME needs a shorter backoff time than the H2H terminal. It can be seen that in practical applications, the ME needs to have a random access backoff time different from that of the H2H terminal. However, the current base station does not distinguish between terminal types, and does not provide differentiated backoff times for different types of terminals. H2H terminals and MTC devices cannot obtain different backoff times, which often leads to network congestion.

[0059] This embodiment proposes to use the fallback sub-header in the existing Random Access Response Medi...

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Abstract

The technical problem to be resolved by the present invention is to provide a random access method and a system for realizing random access, in order to realize the return of a dedicated back-off time, which is different from the one of a Human to Human (H2H) terminal, for a Machine Type Communication (MTC) equipment. Said method includes the following steps: a base station transmits a random access response media access control layer packet data unit to a Machine type communication Equipment (ME), a back-off sub-header of said random access response media access control layer packet data unit includes the dedicated back-off time which is used when said ME reinitiates a random access. The present invention resolves the problem of network congestion, which is caused when the H2H terminal and the MTC equipment can not obtain different back-off times.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a random access method and a system for realizing random access. Background technique [0002] M2M (Machine to Machine) is a concept proposed in the 1990s and is an important driving force for the development of communication technology. Simply put, M2M is the Internet of machines, and the means of realization include various networking technologies. The goal of M2M technology is to enable all machines and equipment to have networking and communication capabilities, and its core concept is Network Everything. The communication objects of M2M are machine-to-machine or human-to-machine. Data communication between one or more machines is defined as MTC (Machine Type Communication, Machine Type Communication), in which less human-computer interaction is required. A machine participating in MTC is defined as an MTC device (MTC UE, ME). An MTC device is a terminal of...

Claims

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Application Information

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IPC IPC(8): H04W74/08
CPCH04W28/10H04W74/002H04W74/0833
Inventor 李兰兰戴谦艾建勋
Owner ZTE CORP
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