The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2018
Filed:
Sep. 22, 2015
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Youngyong Kim, Suwon-si, KR;
Taiho Yoon, Yongin-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A method for performing robust header compression (ROHC) of request for comments (RFC) 3095 over a packet data convergence protocol (PDCP) layer to compress and decompress voice over long term evolution (VoLTE) packets is provided. In the voice call operation, an evolved node B (eNB) receives an initialization and refresh (IR) packet transmitted by a user equipment (UE) and performs ROHC compression/decompression on the voice packet with a compressed header based on the information contained in the received IR packet. If the IR packet is lost, the eNB cannot establish the context for the voice packet, resulting in ROHC operation failure and a call drop problem. In order to maintain the voice call, the eNB sends the UE a static negative acknowledgement (SNACK) when a voice packet is received in the state where no context exists.