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Method and system for notifying random access backoff time of MTC equipment

A technology of random access and back-off time, applied in the field of communication, can solve the problems of unable to realize base station, unable to obtain back-off time, etc., and achieve the effect of avoiding network congestion

Active Publication Date: 2011-12-21
盐城大数据资产经营管理有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The RACH RAR sent for different terminals is in the same random access response message MAC PDU, and the BO time carried in it is also the same, and ordinary terminals and MTC devices cannot obtain different fallback times
For MTC devices that implement different services, different random access back-off times are also required, but the existing technology cannot realize that the base station feeds back different BO times for different services

Method used

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  • Method and system for notifying random access backoff time of MTC equipment
  • Method and system for notifying random access backoff time of MTC equipment
  • Method and system for notifying random access backoff time of MTC equipment

Examples

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no. 1 example

[0114] This embodiment adopts the above-mentioned method 1, and presets a set of random access preambles specially for ME, and these random access preambles may be a part divided from the existing 64 preambles, or may be a newly added set of preambles.

[0115] Figure 5 In step 1, the ME sends a random access request carrying a dedicated preamble set for the ME; the base station receives the random access request sent by the ME, according to the information of the preset preamble set and the preamble carried in the random access request It can be determined that the random access request is sent by the ME.

[0116] Figure 5 In step 3, the base station carries the ME-specific BO time or adjustment factor in the random access response message. Since each field in the MAC RAR in the prior art has specific meanings, it is inconvenient to expand. In order to carry the BO time or adjustment factor through the RAR, it is necessary to add a corresponding MAC RAR for the RAP ID, a...

no. 2 example

[0126] In this embodiment, using the second method above, in order to carry the ME fallback time in the MAC RAR, a dedicated random access preamble is specially preset, and the dedicated random access preamble can be divided from the existing 64 preamble sets The part that is out can also be a newly added leader. The preset random access preamble may correspond to all MEs, or a certain group of MEs (grouped according to subscription information or region), or MEs implementing a certain service, or MEs of a certain access priority. The random access response MAC RAR carrying the dedicated BO time or the adjustment factor corresponds to the preset dedicated random access preamble, and the terminal does not select the preset random access preamble when randomly accessing the network. In the MAC PDU of the random access response message, the base station carries the dedicated RAPID corresponding to the dedicated random access preamble, the corresponding dedicated MAC subheader and...

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Abstract

The invention discloses a method and a system for notifying an MTC device of a random access back-off time, which notifies an ME to access a network using a random access back-off time different from that of an ordinary UE. The method includes: allocating one or more dedicated random access preambles for machine type communication equipment (ME) in advance; during the random access process, when the base station is overloaded, the random access response media access sent by the base station to the terminal The inbound packet data unit (MAC PDU) carries a dedicated random access response corresponding to the dedicated random access preamble, and the dedicated random access response includes ME-specific random access back-off time information; when the ME receives After receiving the dedicated random access response, read the random access back-off time information therein. By adopting the method of the present invention, different random access back-off times can be fed back for ordinary terminals and MTC equipment, and network congestion caused by MTC equipment during random access can be avoided.

Description

technical field [0001] The present invention relates to the communication field, and mainly relates to the fallback (Back Off, BO for short) of an MTC device in an MTC (Machine Type Communication, Machine Type Communication) network architecture based on LTE (Long Term Evolution, Long Term Evolution) when randomly accessing a network. ) time notification method and system. Background technique [0002] M2M (Machine to Machine (Communication), machine-to-machine communication) 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. The data communication between on...

Claims

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Application Information

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IPC IPC(8): H04W68/00H04W74/08
Inventor 李兰兰戴谦艾建勋
Owner 盐城大数据资产经营管理有限公司
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