Method for increasing random access success rate under competition mode, system and device thereof

A random access and random access response technology, which is applied in the access network field of mobile communication technology, can solve the problem of low random access request success rate, etc., to ensure random access success rate, improve performance, and reduce service delay. Effect

Active Publication Date: 2010-04-14
POTEVIO INFORMATION TECH
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Problems solved by technology

It can be seen that when the load of the cell is large, the success rate of the random access request is relatively low

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  • Method for increasing random access success rate under competition mode, system and device thereof
  • Method for increasing random access success rate under competition mode, system and device thereof
  • Method for increasing random access success rate under competition mode, system and device thereof

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0034] In order to improve the success rate of random access, those skilled in the art usually think of increasing the number of random access preambles first, because the more the number of random access preambles, the lower the probability that the UE selects the same random access preamble. However, in the LTE protocol, it has been clearly stipulated that the maximum number of random access preambles used by a cell is 64, so the idea of ​​increasing the random access success rate by increasing the number of random access preambles is not feasible.

[0035] Another solution usually thought of by those skilled in the art is to reduce the number of simultaneous random access requests. However, the number of random access requests is related to the load ...

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Abstract

The invention discloses a method for increasing the random access success rate under a competition mode, a system and a device thereof. A UE in an LTE system can be randomly connected under the competition mode, wherein after UE transmits an MSG3 message to a base station e Node B according to UL- Grant distributed by a random access response message, the equiprobability random selection of the UE could be retransmission or waiting if the UE receives NACK feedback, if selecting the retransmission, the MSG3 message can be retransmitted in a current retransmission subframe, if selecting the waiting, the coming of a next retransmission subframe could be waited for. The invention can be applied for guaranteeing the random access success rate when the load of a district is overlarge, reducing the delay of services, and improving the performance of the LTE system.

Description

technical field [0001] The invention relates to the field of access network of mobile communication technology, in particular to a method, system and device for improving the success rate of random access in a contention mode. Background technique [0002] Random access technology is an important technology of media access control in communication systems. In the long-term evolution (LTE) system, random access is the access process of UE before starting to communicate with the network. It is mainly used for the initial access of users. Incoming, radio resource connection (RRC) connection re-establishment, handover, and uplink and downlink data transmission in the "asynchronous" state, etc. After more than two years of proposals and discussions, the random access process, the allocation and selection of the random access preamble, and the design and configuration of the random access channel have formed standards and are uniformly defined in the protocol. [0003] According ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04L1/18H04L1/16
Inventor 吴永东韦玮白炜
Owner POTEVIO INFORMATION TECH
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