Open TCP connection with web server (three-way handshake). Do a table lookup to determine where to forward the request. Parse the stream to find the URL being requested. Buffer incoming TCP data stream (TCP/IP protocol). Accept incoming TCP connection (three-way handshake). Here is a simplified web switch algorithm: For instance, all secure HTTP requests could be forwarded to a special web server with cryptographic hardware to accelerate those requests. A web switch can direct incoming HTTP requests to different servers based on a variety of networking parameters, including the URL itself. They address the problem of trying to increase the responsiveness of a popular Web site by using more than one web server. Web switches, by contrast, are a new type of network device. Send or drop packet (if link is congested). Determine link layer address of the next hop. Do a table lookup to determine the IP address of the next hop. Find the destination IP address in the IP header. Here is a simplified version of the IP routing algorithm: Packets may traverse a dozen or more routers as they make their way across the Internet. A router accepts packets from one of several network interfaces, and either drops them or sends them out through one or more of its other interfaces. Routers are the workhorses of the Internet. These core, time-critical duties are also called data plane tasks. As an example, I will roughly describe the packet processing duties of a router and a web switch. Not all network devices have the same processing requirements. In this article, I will describe the processing requirements of network devices, how traditional designs meet those requirements, how network processors aim to meet those requirements, and the architecture of a few network processors in detail. Network devices are a growing class of embedded system and include traditional Internet equipment like routers, switches, and firewalls newer devices like Voice over IP (VoIP) bridges, virtual private network (VPN) gateways, and quality of service (QOS) enforcers and web-specific devices like caching engines, load balancers, and SSL accelerators. But what are they good for and how do they work? Network processors are programmable chips like general purpose microprocessors, but are optimized for the packet processing required in network devices. The filing date of the first application is called the "priority date" and, for the purposes of determining the relevant prior art, is considered to be the filing date of the subsequent application(s).įor more information, please see " Guide for applicants I".Major semiconductor manufacturers are starting to sell a new type of integrated circuit, the network processor. For up to 12 months as from that first filing, the applicant can then file, in one or more countries, subsequent applications for the same invention claiming that priority right. accorded a filing date), creates what is known as a "priority right". The first patent application for a specific invention, once validly filed (i.e. 
on request CZ, DE, GB, HR, HU, RO, RS, SK, TR automatic AT, BG, DK, EE, ES, FI, IS, NO, PL, PT, SE w ith search BE, IT, FR, NL, LU (searches done by the EPO) CY, GR, IE without search AL, LT, LV, MC, MK, MT, SI, SM
Ip fast path registration#
Please note that IP offices operate either a registration system or an examination system: However, the national route generally leads to national rights which confer protection of differing extent.įurther information is available on the websites of the IP offices in the member states. Patent law in the EPO member states has been extensively harmonised with the European Patent Convention (EPC) in terms of patentability requirements. If you intend to apply for a patent in just a few European countries, it may be better to choose the national route and file your application at the IP offices in the countries for which you are seeking protection.
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