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Method for frame synchronization of distributed base station

A distributed base station and frame synchronization technology, applied in the field of communication, can solve problems such as large errors, uncertain relationships, and low accuracy

Inactive Publication Date: 2009-07-01
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in this frame synchronization scheme, since there are a total of 32 supergroups in the downlink direction of the C&M channel, and a total of 30 supergroups in the uplink direction, only the synchronization headers of the 4 supergroups received consecutively are detected, and these 4 supergroups cannot be determined. The relationship between the supergroup and the entire C&M channel makes it impossible to determine the frame header of the next 5ms subframe, the accuracy of frame synchronization is low, and when the supergroup offset occurs, the error will be greater

Method used

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  • Method for frame synchronization of distributed base station
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  • Method for frame synchronization of distributed base station

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Embodiment 1

[0102] In this embodiment, synchronization header information with the same structure is set in each supergroup of the C&M channel and the IQ channel, and the synchronization header information includes a synchronization word and a supergroup number at the same time. In the specific setting, the first byte in the first group of each supergroup of the C&M channel and the IQ channel can store the synchronization word, and the second byte can store the supergroup number. The synchronization word and the supergroup number are composed of Sync header information. Among them, the synchronization word may be K28.5, or may be other synchronization words.

[0103] Corresponding to the supergroup in the prior art, the content of the SGN can be added in the first group of the IQ channel supergroup, the SGN can be stored in the second byte in the first group, and the SGN can be stored in the second byte of the C&M channel supergroup. The K28.7 synchronization word is removed from the fir...

Embodiment 2

[0151] In this embodiment, synchronization header information including the first synchronization word is set in each supergroup of the IQ channel; synchronization header information including the first synchronization word, the second synchronization word and the supergroup number is set in each supergroup of the C&M channel information, that is, the synchronization header information with different structures is set in the supergroup of the C&M channel and the IQ channel. The synchronization header information in the supergroup of the IQ channel only includes the first synchronization word, and the synchronization header information in the supergroup of the C&M channel includes both. The first sync word, the second sync word, and the supergroup number. In specific settings, the first byte in the first group of each supergroup of the IQ channel can be stored in the first synchronization word; the first byte in the first group of each supergroup of the C&M channel can be stored...

Embodiment 3

[0217]In this embodiment, the synchronization header information including the first synchronization word is set in each supergroup of the IQ channel; the synchronization header information including the first synchronization word and the second synchronization word is set in each supergroup of the C&M channel, that is, in the The synchronization header information with different structures is set in the supergroup of the C&M channel and the IQ channel. The synchronization header information in the supergroup of the IQ channel may only include the first synchronization word, and the synchronization header information in the supergroup of the C&M channel may include the first synchronization word at the same time. sync word and second sync word. In specific settings, the first byte in the first group of each supergroup of the IQ channel can be stored in the first synchronization word; the first byte in the first group of each supergroup of the C&M channel can be stored The firs...

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Abstract

The invention discloses a method for synchronizing frames in a distributed base station. The method comprises the following steps: setting a synchronization state machine with an initial state, a super-group synchronization state and a frame synchronization state; setting the synchronization head information with the first synchronization word in each super-group of operation maintenance data channel, and setting the synchronization head information with the first synchronization word in each super-group of user data channel; when the synchronization state machine is in the initial state, continuously detecting the first synchronization words in the synchronization head information of the received data and determining whether the synchronization state machine comes into the super-group synchronization state according to the detection result; when the synchronization state machine is in the super-group synchronization state, continuously detecting the remaining information in the synchronization head information of the received super-group and determining whether the synchronization state machine comes into the frame synchronization state; and when the synchronization state machine is in the frame synchronization state, determining the frame header of the next frame. The technical proposal of the frame-synchronizing method can increase the accuracy in frame synchronization.

Description

technical field [0001] The present invention relates to communication technology, in particular to a frame synchronization method in a distributed base station. Background technique [0002] A distributed base station is a combination of base stations that can be installed flexibly and distributed. It includes baseband unit equipment (BBU) and radio frequency remote equipment (RRU), and the BBU and RRU are connected through the Ir interface. The BBU is also called the internal base station. The Radio Equipment Control Center (REC for short), RRU is also called the radio equipment inside the base station (RE for short). [0003] The types of data exchanged between the REC and the RE include: user data (when the user data is transmitted in plural form, the complex data is called IQ data) and operation and maintenance data (C&M data). Among them, the C&M data is used to transmit the information of the operation management and maintenance of the interface and the RE equipment, ...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04J3/06
Inventor 金文华卿敏沈春胜王涛卢山李蓉
Owner TD TECH COMM TECH LTD