Reliable communication method for terminal moving in large range

A communication method, wide-ranging technology, applied in the direction of communication between multiple stations, radio/induction link selection arrangement, selection device, etc., can solve the problem of not being user-oriented, etc.

Inactive Publication Date: 2008-09-24
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fundamental problem is: Cells under the current cellular system are divided according to geographical location, not user-oriented
Switching issues still exist during user movement

Method used

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  • Reliable communication method for terminal moving in large range
  • Reliable communication method for terminal moving in large range

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Experimental program
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Embodiment Construction

[0016] The distributed antenna system of the present invention includes N distributed antennas (A1, A2, ..., AN), does not use a cell structure, and adjusts the number of antennas and the placement density according to the coverage, user density, communication demand, etc., which can facilitate coverage Area expansion and density adjustment. The mobile terminal can communicate with N antennas at the same time, and multiple users use frequency division or time division multiplexing to avoid interference. As the mobile station moves, the signals received by each antenna change accordingly. In the physical layer, signal processing is used to select n channels (1≤n≤N) from the N received signals of N antennas for combination and signal demodulation. It avoids the process of power comparison triggering switching in the cellular system, and reduces the overhead between the physical layer and the high layer. figure 1 The signal processing method of the traditional cell structure and...

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Abstract

The invention relates to a reliable communication method under the condition of movement of a terminal in a large range, in particular to a reliable communication method under the condition of movement of a mobile terminal in a large range by adopting a distributed antenna; the method is characterized in that: when the mobile terminal is moved in the large range, N antennas are adopted for covering and arranged in a distributed way to jointly receive uplink signals; one or more center processing nodes are used for jointly processing and demodulating signals. The center processing node consists of a signal selecting module and a multi-signal joint detecting module; wherein, according to set threshold, the signal selecting module selects n paths (n is more than or equal to 1 and less than or equal to N) in N paths of signals obtained from N antennas and sends the signals to the multi-signal joint detecting module to demodulate original signals at last.

Description

technical field [0001] The invention belongs to the field of wireless communication. When a mobile terminal moves in a large range, a distributed antenna is used to carry out a mobile communication uplink receiving method, and a central processing node performs joint selection and processing of multiple signals, so as to achieve the purpose of coverage and reliable communication. Background technique [0002] In a wireless communication system, spectrum resources are limited, and users' demands for high-speed data communication are increasing rapidly. On the one hand, due to the large path loss of signals at high frequencies, coverage has become a prominent problem in the development of mobile communications to higher frequency bands. On the other hand, with the development of signal processing and coding technology, the space for improving spectral efficiency is getting smaller and smaller. It is difficult to make a breakthrough in the capacity of the cellular communicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04B7/26
Inventor 丁宗睿张秀军朱正航许希斌肖立民高群毅丁国鹏赵熠飞
Owner TSINGHUA UNIV
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