Onboard control of demand assigned multiple access protocol for satellite ATM networks
US6381228B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1999 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jan 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5608
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An onboard DAMA protocol for use in connection with a processing satellite communications network, where multiple users are assigned to a common transmission resource as part of a sharing set. A media access controller (30) on the satellite maintains a reservation log which identifies the frequencies and number of uplink time slots in the resource that are currently reserved by one or more members of the sharing set. To reserve a time-frequency slot on the transmission resource for a non-contentious transmission of data, a user of the sharing set will transmit a reservation request to the satellite on a contentious uplink resource. If a return message is not received, the user knows that the reservation request collided with another reservation request, and a retransmission strategy of the reservation request is employed. When the media access controller (30) receives the reservation request, it decides whether to grant, deny or delay the request based on the service and price class of the user, the amount of data already sent by the user, the number and type of other users with reservation requests in the queue, and the congestion state of the destination downlink port and subsequ…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.