公开(公告)号：EP1337927A1

公开(公告)日：2003-08-27

申请号：EP01983149.4

申请日：2001-10-17

Applicant: Broadcloud Communications, Inc.

Inventor： THOMPSON, David ,  SUBRAMANIAN, Siddarth ,  PARKER, David

IPC: G06F15/16

Abstract: A communications service provider provides wireless access to a packetized data network, such as the Internet (12). The service provider includes a server computer (14). The server computer is connected to the network, which is at least in part a wired network. The wired network is connected to a cellular wireless communications system. The server computer communicates with an e-mail server of the network according to standard network protocols. E-mail messages are served by the e-mail server to the server computer. The e-mail messages are manipulated and maintained at the server computer until requested by an e-mail application of a client device, such as a wireless device (20). An interface resident at the client device communicates with the e-mail application and the server computer. The interface serves to translate from and into optimized protocols for communications between the interface and the server computer.

公开(公告)号：EP1258104A1

公开(公告)日：2002-11-20

申请号：EP01905003.8

申请日：2001-01-22

Applicant: Broadcloud Communications, Inc.

Inventor： ACOSTA, Edward

IPC: H04L12/26

CPC classification number: H04L67/322 ,  H04L1/1642 ,  H04L1/18 ,  H04L1/1809 ,  H04L1/1848 ,  H04L1/188 ,  H04L29/06 ,  H04L67/04 ,  H04L67/327 ,  H04L69/04 ,  H04L69/16 ,  H04L69/161 ,  H04L69/162 ,  H04L69/163 ,  H04L69/22 ,  H04L69/32 ,  H04L69/326 ,  H04L69/329

Abstract: A method of communications over a network is specially adapted for improved transmission performance with reduced bandwidth requirements in communications networks which are low quality or have widely varied physical channel performance, for example, wireless networks (2). The method includes the steps of packetizing the payload (30) into a series of data packets (42), inserting header packets (41) at the beginning, middle, and towards the end of the series, transmitting the series, together with the header packets (41), receiving at least some of the packets (42) of the series and at least one of the header packets (41), and sending an acknowledgement (60). The acknowledgement (60) is either that all data packets and at least one header packet was received; that not all data packets were received and at least one header packet was received; or that some data packets were received, but no header packet was received. Retransmissions of data packets and the header packets, when such packets are not received, is minimized in order to limit the number of communications necessary to deliver an entire data payload.