Browse Prior Art Database

Data Dependent Channel Access Method

IP.com Disclosure Number: IPCOM000052586D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Alspaugh, GR: AUTHOR [+3]

Abstract

Improved means to control a shared communication channel is suggested based on means for controlling channel access by data priority.

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This is the abbreviated version, containing approximately 70% of the total text.

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Data Dependent Channel Access Method

Improved means to control a shared communication channel is suggested based on means for controlling channel access by data priority.

It is desirable to operate many types of communication channels at, or near, the capacity of the channel. However, in many systems, the offered traffic is random in nature and exhibits significant peaks during certain periods. If the channel capacity is provided to handle these peaks with little impact on response time, then the average channel utilization will be low. If the channel capacity provided matches the average traffic demand, then the response time will increase significantly during high traffic periods.

The method of controlling a communication channel can be improved so as to maximize channel utilization and better manage response time.

The proposed method can be used in conjunction with full or half duplex, contention or polled protocols. The method involves the assignment of multiple priority codes to data by type, length, source, etc. Whenever a terminal requests access to the channel, it forwards with the request a predetermined priority code. If channel traffic is light, all data, regardless of priority, is provided channel time. If offered traffic exceeds the channel capacity, then only data of the higher priorities is allowed. In a tightly controlled polled system, the polls can also specify the priority of data it will accept negating response from terminals which have only...