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Signal processing method in mobile terminal random access process

A random access process and mobile terminal technology, applied in wireless communication, electrical components, transmission systems, etc., can solve the problems of access failure, collision of mobile terminals, inability to correctly combine multipath signals, etc., to avoid access failure, Improve the connection rate and make accurate and reasonable judgments

Inactive Publication Date: 2008-05-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] To sum up, the disadvantage of the signal processing method in the random access process of mobile terminals in the prior art is: when multiple mobile terminals initiate random access, if their access prefixes are the same, the system performs signal processing on the access signals At this time, the multipath signals from different mobile terminals cannot be correctly combined, resulting in the access failure of mobile terminals due to access collisions

Method used

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  • Signal processing method in mobile terminal random access process
  • Signal processing method in mobile terminal random access process
  • Signal processing method in mobile terminal random access process

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Embodiment Construction

[0027] The method for signal processing in the mobile terminal random access process described in the present invention is aimed at the prior art. When multiple mobile terminals initiate random access, if their prefix signature codes are the same, the system cannot distinguish between multiple mobile terminals. The access collision phenomenon initiated by the terminal is also raised by the multipath effect caused by the random access initiated by a single mobile terminal passing through the multipath propagation environment.

[0028] When using the method of the present invention to process the access signal randomly accessed by the mobile terminal, first obtain the different arrival times of the multipath signal according to the pre-configured prefix signature code of the cell; then according to the maximum range value of the multipath distribution The access signals of the mobile terminals are combined.

[0029] The core of the present invention is to select different maximu...

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Abstract

The invention discloses a signal processing method in mobile terminal random access process, which comprises: first, catching arrival time of different access signal according to configured prefix feature code of subzone; combining the said access signal according to maximal range value of multidimensional distribution determined by base station. This invention avoids access failure, and improves system access rate.

Description

technical field [0001] The present invention relates to a random access process of a mobile terminal in the field of wireless communication, in particular to a signal processing method in the random access process of a mobile terminal, and in particular to a processing method for access signals before multipath combining in the random access process . Background technique [0002] The random access method of the mobile terminal in the WCDMA system is based on the slotted ALOHA (random access collision method) with fast acquisition indication. A mobile terminal can start transmission in a predefined access slot. The structure of the information transmitted by the mobile terminal during the random access process is as follows: figure 1 As shown, it includes one or more prefix signatures with a length of 4096 chips and a message part with a length of 10ms or 20ms. The mobile terminal first initiates an access request carrying a prefix feature code. The base station captures ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04B7/02H04W74/08H04B1/707
Inventor 吕武
Owner HUAWEI TECH CO LTD
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