一旦设备响应一个UnsubscribeResponse，那么订阅端点将不可用。
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope"
xmlns:wsa="http://www.w3.org/2005/08/addressing"
xmlns:wsnt="http://docs.oasis-open.org/wsn/b-2">
<SOAP-ENV:Header>
<wsa:Action>
http://docs.oasis-open.org/wsn/bw-2/SubscriptionManager/UnsubscribeResponse
</wsa:Action>
</SOAP-ENV:Header>
<SOAP-ENV:Body>
<wsnt:UnsubscribeResponse/>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>