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Enhanced rach design for machine-type communications

A technology of random access channel, machine type communication, applied in the direction of machine to machine/machine type communication service, access restriction, wireless communication, etc., can solve the problem of usage, inefficient radio resources, insufficient support for concurrent data transmission, etc. question

Inactive Publication Date: 2012-05-30
MEDIATEK INC +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this maximum RACH access rate can be regarded as high speed, in some MTC applications, this maximum RACH access rate may still be insufficient to support a large number of concurrent data transmissions
While allocating additional RACH resources may lead to inefficient radio resource usage

Method used

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  • Enhanced rach design for machine-type communications

Examples

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Embodiment Construction

[0026] Reference will now be made to some embodiments of the invention, examples of which are illustrated in the accompanying drawings.

[0027] image 3 is a schematic diagram of a 3GPP network 300 supporting MTC according to one novel aspect. The 3GPP network 300 includes an MTC server 311, and the server 311 communicates with a plurality of MTC devices (such as image 3 An MTC device 314 is shown communicating to provide various MTC services to the MTC user 312 . exist image 3 In the example of , the MTC server 311 , the MTC user 312 and the PDN GW 313 belong to a part of the core network 310 . The MTC device 314 and its serving BS (eNB) 315 belong to a radio access network (radio access network, RAN) 320 . The MTC server 311 communicates with the MTC device 314 through the PDN GW 313 , the S-GW 316 and the eNB 315 . In addition, a mobility management entity (MME) 317 communicates with the eNB 315 , the Serving GW 316 and the PDN GW 313 to perform mobility management ...

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Abstract

An adaptive RACH operation is proposed for machine-type communications (MTC) in a 3GPP wireless network. The adaptive RACH operation is based on context information to reduce RACH collision probability, to control network overload, and to enhance system performance. The context information includes device related information and network related information. Device related information includes device type and service or application type. Network related information includes network load information and historical statistics information. Based on the context information, an MTC device adjusts various network access and RACH parameters by applying adaptive RACH operation in different levels. For example, in the application level and the network level, the MTC device adjusts its access probability or RACH backoff time for RACH access. In the radio access network (RAN) level, the MTC device adjusts its access probability or RACH backoff time, or transmits RACH preambles using adjusted RACH radio resources and preambles.

Description

[0001] Cross References to Related Applications [0002] The claims to this application claim priority under 35 U.S.C. §119 to the following application: 61 / 370,555, filed August 4, 2010, entitled "Protocol Design to Reduce RACH Collision in Machine-Type Communications" in the United States Temporary case. This application is hereby incorporated by reference in its entirety. technical field [0003] The embodiments disclosed in the present invention are related to Machine-Type Communications (MTC), and more specifically, related to the design of enhanced Random Access Channel (RACH) of MTC. Background technique [0004] Machine-Type Communications (MTC) is a type of data communication involving one or more entities without human interaction. A service that optimizes MTC is different from a service that optimizes human-to-human (H2H) communication. In general, MTC services are different from existing mobile networks because they involve different usage scenarios, pure dat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/00H04W8/08H04W24/02H04W4/70
CPCH04W74/006H04W74/085H04W48/06H04W84/04H04W4/70H04W74/0833
Inventor 林冠宇魏宏宇陈义升徐家俊
Owner MEDIATEK INC
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