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15 Multi-AP control messaging reliability
All Multi-AP control messages sent using the CMDU unicast transmission procedure rely on a paired transaction to provide reliability. Many Multi-AP control messages are request and response message pairs e.g. Client Capability Query message and Client Capability Report message. For Multi-AP control messages that are sent as unicast notifications without an expected information response, a generic 1905 Ack message is sent per section 17.1.32. The generic 1905 Ack message shall contain the same MID that was received in the Multi-AP control message that this Ack message is acknowledging.
使用CMDU单播传输过程发送的所有Multi-AP控制消息都依赖于成对事务来提供可靠性。许多Multi-AP控制消息都是一对请求和响应消息，例如客户端能力查询消息和客户端能力报告消息。对于作为单播通知发送而没有预期信息响应的Multi-AP控制消息，根据第17.1.32节发送通用1905 Ack消息。通用1905 Ack消息应包含在Multi-AP控制消息中接收到的与该Ack消息确认的相同的MID。
To improve reliability, if the request message and/or the response message is lost, the sender may send another request message (using a new MID value). Similarly, if the notification message and/or the 1905 Ack message is lost, the sender may send another notification message (using a new MID value).
为了提高可靠性，如果请求消息和/或响应消息丢失，发送方可以发送另一个请求消息（使用新的中间值）。类似地，如果通知消息和/或1905 Ack消息丢失，发送方可以发送另一个通知消息（使用新的MID值）。
A new transmission type and the corresponding procedures are defined in section 15.1 to increase the reliability of a message defined in [2] sent using the CMDU relayed multicast transmission procedure. Its applicability to each message is described in Table 9.
第15.1节定义了一种新的传输类型和相应的程序，以提高使用CMDU中继多播传输过程发送的[2]中定义的消息的可靠性。表9描述了它对每条消息的适用性。
15.1 CMDU reliable multicast transmission
Since the messages sent by the CMDU relayed multicast transmission procedure do not return an acknowledgement, in some extreme poor link condition (e.g. very high packet error probability condition) the CMDU might be lost. To increase the probability of receiving the CMDUs, a Multi-AP device sends the CMDU as relayed multicast and also sends the same CMDU (with the same MID) using the unicast procedure to other discovered Multi-AP devices. A receiver discards any duplicated received CMDU based on the MID.
由于CMDU中继多播传输过程发送的消息不会返回确认，因此在某些极端恶劣的链路条件下（例如，非常高的数据包错误概率条件），CMDU可能会丢失。为了增加接收CMDU的概率，Multi-AP设备将CMDU作为中继多播发送，也发送相同CMDU（具有与多播CMDU相同的MID）使用单播发送给其它已知的Multi-AP设备。接收方基于MID丢弃重复接收到的CMDU。
15.1.1 CMDU reliable multicast transmission procedures
In the CMDU reliable multicast transmission procedures,
在CMDU可靠多播传输过程中:
• the Multi-AP device shall transmit the CMDU as a relayed multicast transmission per section 7.3 of [2] (i.e. with the relay Indicator field in the CMDU set to one).
•Multi-AP设备应根据[2]第7.3节（即CMDU中的中继指示符字段设置为1）将CMDU作为中继多播传输进行传输。
• the Multi-AP device shall transmit the same CMDU as a unicast transmission (using the same MID but with the relay Indicator field in the CMDU set to zero) per section 7.4 of [2] to other discovered Multi-AP devices on the Multi-AP network.
•根据[2]第7.4节，Multi-AP设备应以单播传输的方式传输相同的CMDU（使用相同的MID，但CMDU中的relay Indicator字段设置为零）传输到Multi-AP网络上已发现的其它Multi-AP设备。
15.1.2 CMDU reliable multicast reception procedures
In the CMDU reliable multicast reception procedures,
在CMDU可靠多播接收过程中：
• the Multi-AP device shall process a received CMDU with the relay Indicator set to one per section 7.6 of [2].
•根据[2]第7.6节，Multi-AP设备应处理接收到的CMDU（CMDU报文内中继指示符设置为1）。
• the Multi-AP device shall process a received CMDU with the relay Indicator set to zero per section 7.7 of [2].
•根据[2]第7.7节，Multi-AP设备应处理接收到的CMDU（CMDU报文内中继指示符设置为0）。
16 Higher layer data payload over 1905（1905上的高层数据负载）
Multi-AP control messages are defined to provide a generic mechanism to carry higher layer data as opaque payload over the 1905 abstraction layer. This generic mechanism can be used to transport higher layer protocol messages over 1905 on a Multi-AP device, e.g. transport higher layer messages to access and manipulate TR-181 data objects (see [4]).
Multi-AP控制消息被定义为提供一种通用机制，在1905抽象层上以不透明有效负载的形式携带更高层的数据。这种通用机制可用于在Multi-AP设备上传输1905以上的高层协议消息，例如传输高层消息以访问和操作TR-181数据对象（见[4]）。
If triggered by an HLE, a Multi-AP Controller or a Multi-AP Agent shall send a Higher Layer Data message per section 17.1.31. A Multi-AP Controller or a Multi-AP Agent shall include a Higher Layer Data TLV received from the HLE in the Higher Layer Data message.
如果由HLE触发，Multi-AP控制器或Multi-AP代理应根据第17.1.31节发送高层数据消息。Multi-AP控制器或Multi-AP代理应在较高层数据消息中包括从HLE接收的更高层数据TLV。
If a Multi-AP Controller or a Multi-AP Agent receives a Higher Layer Data message, then it shall respond within one second with a 1905 Ack message per section 17.1.32. The 1905 Ack message shall contain the same MID that was received in the Higher Layer Data message.
如果Multi-AP控制器或Multi-AP代理接收到更高层的数据消息，则其应在1秒内按照第17.1.32节的规定用1905 Ack消息进行响应。1905 Ack消息应包含在高层数据消息中接收到的相同的MID。