用户信息包举例中英对照翻译文件

7　用户信息包举例 Examples of Consumer Information Packet

7.1　应答器链接【ETCS-5】 The linkage between balises 【ETCS-5】
如图 24所示，以区间B1应答器为例，该应答器应与B2和B3应答器建立链接关系。并且，当B2或B3应答器链接失败时，如果地面提供的数据能保证正常控车时，则B2应答器和B3应答器链接失败时ATP采取的措施项分别为“没有反应”，当与B2和B3应答器组链接均失败时，ATP车载设备根据已有的数据选择相应的模式控制列车。
As is shown in fig.24 Take B1 balise in the section as example, this balise should be linked with B2 and B3 balises. In addition, when B2 or B3 balise linkage is failed, if the data provided by the ground can guarantee the normal controlling of train, measures adopt by ATP are “without reaction”; if the linkage of B2 and B2 balise group are all failed, ATP trainborne facilities will choose corresponding mode to control the train according to the existed data.

7.2　线路坡度【ETCS-21】 The gradient of line【ETCS-21】
以B1应答器为例，在既有线应答器报文编制中应答器提供的线路坡度信息宜于该应答器提供的轨道区段信息起始点一致，因此第一个D_GRADIENT=15；终点宜于该应答器描述的轨道区段的终端一致，如图 24所示。
Take B1 balise as example, in the message compilation of the existed line balise, the line gradient information provided by the balise should be consistent with the information initial point of tract section provided by the balise. Therefore the first one D_GRADIENT=15; the end point should be consistent with the end of track section described by the balise, as shown in fig.24.

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7.3　线路速度【ETCS-27】 Line Speed 【ETCS-27】
以B1应答器为例，在既有线应答器报文编制中应答器提供的线路速度信息宜于该应答器提供的轨道区段信息起始点一致，因此第一个D_STATIC =15，终点宜于该应答器描述的轨道区段的终端一致，如图 24所示。
Take B1 balise as example, in the message compilation of the existed line balise, the line speed information provided by the balise should be consistent with the information initial point of tract section provided by the balise. Therefore the first one D_STATIC =15; the end point should be consistent with the end of track section described by the balise, as shown in fig.24.

7.4　轨道区段【CTCS-1】 Track Section 【CTCS-1】
临时限速信息包作为用户自定义的CTCS数据包，因此应该镶嵌在ETCS-44信息包中。如图 24所示，以B1应答器为例其轨道区段信息包如下：
Temporary limited speed information includes CTCS data packet which is defined by user, so it should be inlaid in ETCS-44 information packet. As is shown in fig. 24 take B1 balise as example, its track section information are as follows:

7.5　等级转换【ETCS-41】 Grade transition 【ETCS-41】
B1应答器为出站口处应答器，当系统由CTCS-0/1转至CTCS-2时，B2应答器为预告点，B3应答器为执行点；当系统由CTCS-2转至CTCS-0/1时，B4应答器为预告点，B3应答器为执行点，一般情况下，L1=L2=240m。
B1 balise is exit balise. During the system is transformed from CTCS-0/1 to CTCS-2, B2 balise is the warning point while B3 balise is the execution point; during the system is transformed from CTCS-2 to CTCS-0/1, B4 balise is the warning point while B3 balise is the execution point, generally, L1=L2=240m.

7.5.1　CTCS-0/1转至CTCS-2时：CTCS-0/1 transformed to CTCS-2:
7.5.1.1　B2应答器级间转换信息包举例如下：
Examples of B2 balise interclass transformation information packet are as follows:

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