客户端可以显示的使用UnsubscribeRequest来终止订阅，那么设备可以立即释放资源。该请求被定向到在CreatePullPointSubscriptionResponse中返回的订阅端点。
<?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/UnsubscribeRequest
</wsa:Action>
<wsa:To>
http://160.10.64.10/Subscription?Idx=0
</wsa:To>
</SOAP-ENV:Header>
<SOAP-ENV:Body>
<wsnt:Unsubscribe/>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>