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Uplink receiving method for distributed antenna system

A technology of distributed antenna and receiving method, applied in the field of communication, can solve problems such as interference, inability to adjust UE timing advance value, inability to guarantee multi-user data synchronization, etc., to achieve the effect of improving reception performance and avoiding interference

Active Publication Date: 2015-04-29
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the LTE system where distributed antennas are used, the distance between the terminal and each RRU is different, and the timing advance value (TA) of the UE cannot be adjusted, so it is impossible to ensure that the multi-user data received on the RRU can be synchronized, resulting in the uplink between multiple terminals. interference

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  • Uplink receiving method for distributed antenna system
  • Uplink receiving method for distributed antenna system
  • Uplink receiving method for distributed antenna system

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] In the embodiment of the present invention, each RRU calculates the peak value of the channel impulse response in the time domain and the delay corresponding to the peak value according to the uplink signal sent by the terminal UE; the reference RRU is determined according to the peak value and the delay of each RRU , the reference RRU is the RRU closest to the UE, and the valid RRU and the TA for the UE to send uplink data are determined according to the delay of the reference RRU, and then the service data received by the valid RRU is combined. It ensures that multi-user data received on the RRU can be synchronized, avoids interference between uplink multi-terminals, and improves receiving performance.

[0028] See attached ...

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Abstract

An uplink receiving method for a distributed antenna system includes: each RRU (radio remote unit) calculates uplink signals transmitted by UE (user equipment) to obtain peak value of time domain channel impact response and time delay corresponding to the peak value; reference RRUs are determined according to the peak value and time delay obtained by each RRU, and TA (time advance) of uplink data transmitted by the effective RRUs and the UE are determined according to the time delay of the reference RRUs; and service data received by the effective RRUs are combined. By the use of the method, uplink inter-terminal interference is avoided and receiving performance is improved.

Description

technical field [0001] The present invention relates to the technical field of communications, and more specifically, to an uplink receiving method of a distributed antenna system. Background technique [0002] Distributed antennas need to be applied in communication systems. For example, in order to solve the problem of frequent switching in high-speed rail systems, distributed antennas are used to expand the range of cells. The distributed antenna system adopts the network structure of baseband processing unit (BBU) + remote radio unit (RRU) to realize multi-cell combination. A BBU can send data to a terminal (UE) or receive data sent by a terminal through multiple RRUs. [0003] In a distributed antenna system, due to the different distances from the UE to multiple RRUs, the propagation time of electromagnetic waves in the process of transmitting data from the UE to the RRU is different, and the time for each RRU to receive the signal is also different, and the uplink de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08
Inventor 于小红
Owner POTEVIO INFORMATION TECH CO LTD