Browse Prior Art Database

Communications System with Procedure for Handling Emergency Message

IP.com Disclosure Number: IPCOM000088504D
Original Publication Date: 1977-Jun-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Dellheim, JL: AUTHOR

Abstract

The drawing shows a system that includes a central station 2 and a large number of remote stations represented by stations 3 and 4. A common communications channel 5 carries a message from the central station to a remote station, and a common communications channel 6 carries a message from a remote station to the central station. The communications channels can be wired or wireless. Remote stations do not receive on the outgoing channel 5 from the central station, and they have no indication of whether this channel is being used by another remote station.

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Communications System with Procedure for Handling Emergency Message

The drawing shows a system that includes a central station 2 and a large number of remote stations represented by stations 3 and 4. A common communications channel 5 carries a message from the central station to a remote station, and a common communications channel 6 carries a message from a remote station to the central station. The communications channels can be wired or wireless. Remote stations do not receive on the outgoing channel 5 from the central station, and they have no indication of whether this channel is being used by another remote station.

The resouces of channel 6 are allocated to the remote stations in a way that provides optimum access by the remote stations to the central station. For example, the central station can poll the remote stations by a polling technique that reduces the amount of polling overhead and gives fast access to priority messages and adequate access to routine messages. Additionally, the central station may conduct a special poll to which a remote station may respond only if it has a priority message.

When an emergency message originates at one of the remote stations, the usual techniques for allocating the resources of channel 6 may not provide sufficiently rapid access by the remote station having the remote message. In this system, a remote station with an emergency message begins transmission immediately without waiting for a poll from the central station. If n...