Aloha optimization

• US 5,625,628 A
• Filed: 03/15/1995
• Issued: 04/29/1997
• Est. Priority Date: 03/15/1995
• Status: Expired due to Term

• Current Assignee: Hughes Network Systems LLC (Echostar Corporation)
• Original Assignee: Hughes Electronics Corporation (Rtx Corporation)
• Inventors: Heath, Robert G.
• Primary Examiner(s): OLMS, DOUGLAS W
• Application Number:
  US08/404,707
• Time in Patent Office: 776 Days
• Field of Search: 370/79, 370/85.7, 370/95.1, 370/95.3, 370/97
• US Class Current: 370/321
• CPC Class Codes: H04B 7/18582 Arrangements for data linking, i.e. for data framing, for error recovery, for multiple access
• CPC Class Codes: H04J 3/247 ATM or packet multiplexing

Abstract

An method of Aloha optimization involves designating a time period as an inroute frame. Such designating includes designating a first portion of the inroute frame as a Transaction Reservation portion, and designating a second portion of the inroute frame as an Aloha portion. A request is transmitted from a first remote terminal to the host terminal that the host terminal allocate one or more slots of the Transaction Reservation portion to the first remote terminal. One or more unallocated slots within the Transaction Reservation portion are then redesignated as extra Aloha slots. A target slot is then randomly selected by a second remote terminal from the slots within the Aloha portion and the extra Aloha slots.

Claims

1. A method of Aloha optimization in an integrated satellite network comprising the steps of:

designating a time period as an inroute frame during which information can be communicated via an earth orbit satellite from one or more of a plurality of remote terminals to a host terminal, the designating step further comprising the steps of;

designating a first portion of the inroute frame as a Transaction Reservation portion; and

designating a second portion of the inroute frame as an Aloha portion;

requesting, in the event a Transaction Reservation portion is to be communicated from a first of the plurality of remote terminals, that the host terminal allocate one or more slots of the Transaction Reservation portion to the first of the plurality of remote terminals;

redesignating one or more unallocated slots within the Transaction Reservation portion as extra Aloha slots; and

selecting at least one target slot, in the event an Aloha packet is to be communicated from a second of the plurality of remote terminals, from a group of slots comprising slots within the Aloha portion and the extra Aloha slots.

2. The method of claim 1 further comprising:

transmitting said Aloha packet of information in said target slot.

3. The method of claim 2 wherein said step of selecting from said group of slots comprises the step of:

selecting said target slot randomly from said group of slots.

4. The method of claim 3 wherein said step of designating of said second portion of said inroute frame as said Aloha portion comprises the step of:

designating said second portion of said inroute frame as a User Aloha portion.

5. The method of claim 3, wherein said step of designating of said second portion of said inroute frame as said Aloha portion comprises the step of:

designating said second portion of said inroute frame as a Control Aloha portion.