Solution : https://service.sap.com/sap/support/notes/80475 (SAP Service marketplace login required)
Key words : 
/3 kernel patch level rfc api version sapgui version saprouter version, tools ==> abap workbench ==> utilities ==> maintenance ==> patches, similar platform release restrictions apply, component xx-ser-swrel -, component xx-ser-swrel, /general/misc/saprouter/readme, large extent downward compatible, rfc api version, sap supported network products, existing operating system services
Related Notes : 
       
| 664679 | Installing 6.40 kernel in SAP WEB AS 6.10/6.20 | 
| 318846 | Installing the 4.6D kernel in 4.6A/B/C SAP systems | 
| 209501 | Current SAP Patient Management releases | 
| 158709 | Installation SAP R/3 64 bit kernel ReliantUNIX | 
| 155355 | Installation SAP R/3 4.5B-64bit kernel | 
| 146248 | Installation SAP R/3 4.0B-64bit kernel | 
| 138704 | Provision of patches for kernel releases | 
| 97660 | OCS: Further Information Needed | 
| 33525 | Important information about SAP patches (< 3.1H) | 
| 19466 | Downloading SAP kernel patches |