Method and apparatus for web caching
US6990526B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 2001 |
| Grant date | Jan 24, 2006 |
| Priority date | — |
| Expiry date | Oct 21, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/288
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for web caching is disclosed. The method and apparatus may be implemented in hardware, software or firmware. Complementary cache management modules, a coherency module and a cache module(s) are installed complementary gateways for data and for clients respectively. The coherency management module monitors data access requests and or response and determines for each: the uniform resource locator (URL) of the requested web page, the URL of the requestor and a signature. The signature is computed using cryptographic techniques and in particular a hash function for which the input is the corresponding web page for which a signature is to be generated. The coherency management module caches these signatures and the corresponding URL and uses the signatures to determine when a page has been updated. When, on the basis of signature comparisons it is determined that a page has been updated the coherency management module sends a notification to all complementary cache modules. Each cache module caches web pages requested by the associated client(s) to which it is coupled. The notification from the cache management module results in the cache module(s) which are the r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.