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Method and system for air interface time synchronization, radio equipment and radio equipment control

A time synchronization, wireless device technology, applied in the field of communication, can solve the problems of asynchronous RE air interface processing time, differences in transmission methods and processing methods, transmission delay and delay jitter, etc., to achieve the effect of air interface time synchronization

Active Publication Date: 2014-01-22
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] However, when the Ethernet switching network or bearer transmission network implements data transmission between REC and RE, due to the large number of devices on the Ethernet switching network or bearer transmission network, data needs to pass through multi-stage transmission equipment from REC to RE, and the transmission of each equipment There is also a big difference in the method and processing method, which will lead to transmission delay and delay jitter, so that the RE air interface processing time is not synchronized, and cannot meet the air interface time synchronization requirements of the wireless communication protocol.

Method used

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  • Method and system for air interface time synchronization, radio equipment and radio equipment control
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  • Method and system for air interface time synchronization, radio equipment and radio equipment control

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Embodiment Construction

[0037] Embodiments of the present invention provide an air interface time synchronization method and system, a wireless device, and a wireless device controller for implementing air interface time synchronization between REs.

[0038] In the embodiment of the present invention, the CPRI interface and the OBSAI interface use time-division data stream transmission to transmit data, and the packetized transmission of the base station performs packet mode data transmission through the bearer transmission network or the Ethernet switching network, wherein the interface form of the packetized data transmission of the base station It can be Fast Ethernet (FE) or Gigabit Ethernet (GE) or 10Gigabit Ethernet (10GE) with optical or electrical ports. There are two typical application scenarios , see figure 1 , which is an architectural diagram of the connection between REC and RE through an Ethernet switch. By utilizing the high availability of Ethernet interfaces (such as FE / GE / 10GE, etc...

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Abstract

The embodiment of the invention discloses a method and system for air interface time synchronization, radio equipment (RE) and a radio equipment control (REC), thereby realizing air interface synchronization at an RE side. According to the embodiment of the invention, the method comprises the following steps that: the RE receives a data frame sent by the REC, wherein the data frame carries time information; and according to the time information, data carried by the data frame are sent. Therefore, air interface time synchronization of the RE side can be effectively realized.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an air interface time synchronization method and system, a wireless device, and a wireless device controller. Background technique [0002] Currently, the two most used baseband radio frequency interface protocols in the world are the Common Public Radio Interface (CPRI) interface and the Open Base Station Architecture Initiative (OBSAI) interface. The CPRI interface and OB SAI interface system adopt time-division data flow transmission mode, and the interface form can be electrical port or optical port. The traditional base station system topology based on these two interfaces includes star structure, chain structure, tree structure, and ring structure. structure etc. [0003] Both the CPRI interface and the OBSAI interface define the standards for the maximum round-trip transmission delay (Round-Trip Time, RTT) and delay jitter, where the maximum round-trip transmission...

Claims

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Application Information

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IPC IPC(8): H04W56/00
Inventor 张瑜
Owner HUAWEI TECH CO LTD
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