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 Title: |
US5561666:
Apparatus and method for determining operational mode for a station entering a network
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Christensen, Kenneth J.; Apex, NC
Chorpenning, Jack S.; Cary, NC
Siegel, Michael S.; Raleigh, NC
Stammely, Thomas E.; Cary, NC
Strole, Norman C.; Raleigh, NC
Wilson, Kenneth T.; Raleigh, NC
Zeisz, Jr., Raymond L.; Raleigh, NC
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| Assignee: |
International Business Machines Corporation, Armonk, NY
other patents from INTERNATIONAL BUSINESS MACHINES CORPORATION (280070) (approx. 44,393)
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| Published / Filed: |
1996-10-01
/ 1995-03-06
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| Application Number: |
US1995000399267
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| IPC Code: |
Advanced:
H04L 5/14;
H04L 12/24;
H04L 12/28;
H04L 12/40;
H04L 12/433;
H04L 12/44;
H04L 12/46;
H04L 29/06;
Core:
H04L 12/427;
more...
IPC-7:
H04B 1/56;
H04L 5/14;
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| ECLA Code: |
H04L12/40; H04L12/24F4; H04L12/28; H04L12/40R; T04L12/417;
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| U.S. Class: |
Current:
370/276;
370/296;
370/434;
Original:
370/024;
270/031;
270/056;
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| Field of Search: |
370/024,31,85.4,85.5,85.12,85.13,85.14,85.15,60,60.1,94.1,56
375/222
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| Priority Number: |
| 1995-03-06 |
US1995000399267 |
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| Abstract: |
A station in a communications network determines the mode (full-duplex or half-duplex) in which it communicates with a concentrator port by establishing a Registration routine between the station and the concentrator port. The station and concentrator port exchange frames which disclose the capabilities of the concentrator port. If the concentrator port has duplex capabilities, the station enters as a duplex station. Otherwise, the station enters in a half-duplex (token ring) mode.
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| Attorney, Agent or Firm: |
Cockburn, Joscelyn G. ;
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| Primary / Asst. Examiners: |
Safourek, Benedict V.; Patel, Ajit
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| Maintenance Status: |
E3 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
DE FR GB
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| Family: |
Show 8 known family members
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First Claim:
Show all 42 claims |
What is claimed is:
1. A method for establishing and sustaining full-duplex mode of operation between a station and a port in a dedicated bandwidth concentrator to which the station is connected, said method comprising the steps of:
- generating and transmitting to the port in the dedicated bandwidth concentrator a Registration Request Medium Access Control MAC frame having request sub-fields requesting permission to operate in the full-duplex mode of operation;
- receiving in said station a Registration (REG) Response MAC frame with response sub-fields carrying predetermined frame type response codes;
- examining the response sub-fields in the Registration Response MAC frame to determine settings of the predetermined frame type response codes;
- if the predetermined frame type response codes are set to a first value indicating permission to operate in the full-duplex mode thereafter operating said station in the full-duplex mode, if the predetermined type response codes are set to a second value indicating permission denied deactivating said station if the station can only operate in the full-duplex mode.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 31 U.S. patent(s) that reference this one
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