Search International and National Patent Collections
|1. (WO2017040940) IMPROVED BLOCK TRANSFER OPERATION IN COAP PROTOCOL|
|Applicants:||CONVIDA WIRELESS, LLC
RAHMAN, Shamim, Akbar
|Title:||IMPROVED BLOCK TRANSFER OPERATION IN COAP PROTOCOL|
Modifications are made to the existing CoAP block transfer mechanism to minimize waste associated with excess load and congestion and excess message and block transfers during transfers of resources that are dynamically changing. In one aspect, a retransmission budget is introduced to limit the number of attempted message retransmissions. In another aspect, a retransmission time function is introduced to determine when to retransmit a message. In yet another aspect, two new Block Options are introduced to coordinate retransmission operations between the client and the server. Additionally, in an aspect, two new Block Options are introduced to indicate which range of blocks of a requested resource have changed since last retrieval. In another aspect, each block of a resource will have an associated ETag, and three new Block Options are introduced to indicate which specific blocks have changed since last retrieval.