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Method and device for carrying cryptic information accessed asynchronous random

A technology of random access and information carrying, which is applied in the direction of selection device, communication between multiple stations, radio/inductive link selection arrangement, etc., and can solve problems such as limitation, limitation on the number of preamble sequences, and limitation on the number of information

Active Publication Date: 2008-06-18
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the terminal uses UpPTS to send preambles, since the number of preambles is proportional to the length of the sending slot, the length of UpPTS will limit the number of preambles
Due to the limited length of the UpPTS, the number of preambles allocated by the system to each cell is also limited, resulting in a limited amount of information carried by the preamble

Method used

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  • Method and device for carrying cryptic information accessed asynchronous random
  • Method and device for carrying cryptic information accessed asynchronous random
  • Method and device for carrying cryptic information accessed asynchronous random

Examples

Experimental program
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Embodiment Construction

[0040] Through the analysis of the one-step random access method, it can be seen that the terminal always carries information through the preamble sequence to notify the base station of necessary information. Due to the limitation of the length of the UpPTS in the structure of the existing radio subframe, the number of preamble sequences allocated to the cell by the system is also limited. In order to send more information when the number of preamble sequences is limited, the present invention proposes a method for carrying implicit information to increase the information carried by the preamble sequences.

[0041] Next, the principle of the method proposed by the present invention will be described in detail.

[0042] For the TD-SCDMA system, the preamble sequence can be sent through the UpPTS in every 5ms wireless subframe. When the number of preamble sequences allocated by the system to a cell is N, the terminal can use the N preamble sequences to send N types of correspon...

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PUM

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Abstract

The invention discloses a method for carrying the implicit information of an asynchronous random access, which includes allocating the arrangement information for a wireless subframe group. When a terminal is accessed asynchronously, at least two wireless subframes are arranged as the wireless subframe group according to the arrangement information and each wireless subframe in the wireless subframe group is marked; when the information to be transmitted includes the information expressed by the marks of the wireless subframes and other informations, the other informations are carried through a leader sequence and the leader sequence is transmitted to a network side through the wireless subframes provided with corresponding marks. The invention simultaneously discloses a device for the implicit information of an asynchronous random access. Compared with the information carried by the leader sequence, the information carried by the marks of the wireless subframe can be called as implicit information. The invention carries information by marking the wireless subframes and utilizing the marks of the wireless subframes, thereby realizing carrying more information under a situation that the lead sequences of the wireless subframes are limited.

Description

technical field [0001] The invention relates to an asynchronous random access technology in a mobile communication system, in particular to a method and device for carrying implicit information of asynchronous random access. Background technique [0002] Time-division synchronous code-division multiple access (TD-SCDMA) system is the only one among the three major international standards of the third-generation mobile communication system that adopts time-division duplex mode. Great flexibility. The system comprehensively uses advanced technologies in wireless communication such as smart antenna, uplink synchronization, joint detection and software radio, so that the system has high performance and spectrum utilization. [0003] The frame structure of the TD-SCMDA system consists of a 10ms wireless frame, and each wireless frame is divided into two 5ms wireless subframes. The structure of the radio subframe is as follows figure 1 shown. figure 1 Among them, each wireless...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04Q7/38
Inventor 孙韶辉王映民索士强
Owner DATANG MOBILE COMM EQUIP CO LTD
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