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Patent Agency Ranking
公开(公告)号：CA2425934A1
公开(公告)日：2000-01-14
申请号：CA2425934
申请日：1998-07-14
Applicant: IBM CANADA
Inventor： MCKAY DANNY N , BAKER MURRAY C , SINHA RUPAM
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公开(公告)号：CA2243218C
公开(公告)日：2002-04-02
申请号：CA2243218
申请日：1998-07-14
Applicant: IBM CANADA
Inventor： WONG DANIEL Y , JEAN NELSON , MCKAY DANNY N , SINHA RUPAM , BAKER MURRAY C
IPC: H04L47/765 , H04W80/02 , H04L29/06 , H04L12/18
Abstract: The invention provides a method for communication between a plurality of stations in a communication network using media access protocol, in which medium access is granted to stations obtaining a successful reservation of the medium and in which data transmission verification is performed by the protocol within the reservatio n. In the method a station sends a request message on the communication medium for a reservation of the medium to a recipient station in the network. The recipie nt station sends a reservation confirmation message back to the sending station which receives it and responds to the reservation confirmation message by sending an ordered sequence of data frames to the recipient station. After sending the ordered sequence of data frames the sending station sends an end of transmission message to the recipient station, which replies by sending back an end of transmission confirmation identifying the number of frames received in their original sequence. If the number is n ot correct remedial action can be taken by the sending station to resend missing data. Address conflict resolution is also provided by another aspect of the invention. The invention has embodiments which handle unicast and groupcasting transmissions.
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公开(公告)号：CA2243218A1
公开(公告)日：2000-01-14
申请号：CA2243218
申请日：1998-07-14
Applicant: IBM CANADA
Inventor： JEAN NELSON , SINHA RUPAM , WONG DANIEL Y , BAKER MURRAY C , MCKAY DANNY N
IPC: H04L47/765 , H04W80/02 , H04L29/06 , H04L12/18
Abstract: The invention provides a method for communication between a plurality of stations in a communication network using media access protocol, in which medium access is granted to stations obtaining a successful reservation of the medium and in which data transmission verification is performed by the protocol within the reservation. In the method a station sends a request message on the communication medium for a reservation of the medium to a recipient station in the network. The recipient station sends a reservation confirmation message back to the sending station which receives it and responds to the reservation confirmation message by sending an ordered sequence of data frames to the recipient station. After sending the ordered sequence of data frames the sending station sends an end of transmission message to the recipient station, which replies by sending back an end of transmission confirmation identifying the number of frames received in their original sequence. If the number is not correct remedial action can be taken by the sending station to resend missing data. Address conflict resolution is also provided by another aspect of the invention. The invention has embodiments which handle unicast and groupcasting transmissions.
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公开(公告)号：CA2425934C
公开(公告)日：2004-04-20
申请号：CA2425934
申请日：1998-07-14
Applicant: IBM CANADA
Inventor： MCKAY DANNY N , BAKER MURRAY C , SINHA RUPAM
Abstract: One aspect of the invention provides a method of communication in a medium, for a communication network having a number of stations, using Medium Access Contr ol protocol that incorporates quality of service capabilities wherein at least one of th e stations is capable of generating a (repetitive) beacon for assigning priority levels for each priority station on the network, wherein a station, before transmitting information on the network, attempts to detect the presence of a beacon for the network, and if the presence of a beacon is not detected, adopts the status of a beacon and transmits a beacon message to other stations in the network. In another aspect of the invention interference is reduced in communication in a medium using carrier modulation, for a communication network having a plurality of stations, usin g access control protocol wherein at least one of the stations is capable of generating a control message (SOD) that can be transmitted to other stations on the network to change the metho d of modulation being used, wherein communication between stations in the network is being performed using a first modulation method, by initiating a change in the modulation method bei ng used by sending a control message containing identification of a second modulation method to other stations toinform them of the second modulation method; allowing the o ther stations to change the modulation method used to the second modulation method. The control message further includes a direction to thaw other stations not charging modulation to the second modulation method to instruct them not to transmit using the first modulation method.
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公开(公告)号：CA2242985A1
公开(公告)日：2000-01-14
申请号：CA2242985
申请日：1998-07-14
Applicant: IBM CANADA
Inventor： BAKER MURRAY C , SINHA RUPAM , MCKAY DANNY N
Abstract: One aspect of the invention provides a method of communication in a medium, for a communication network having a number of stations, using Medium Access Control protocol that incorporates quality of service capabilities wherein at least one of the stations is capable of generating a (repetitive) beacon for assigning priority levels for each priority station on the network, wherein a station, before transmitting information on the network, attempts to detect the presence of a beacon for the network, and if the presence of a beacon is not detected, adopts the status of a beacon and transmits a beacon message to other stations in the network. In another aspect of the invention interference is reduced in communication in a medium using carrier modulation, for a communication network having a plurality of stations, using access control protocol wherein at least one of the stations is capable of generating a control message (SOD) that can be transmitted to other stations on the network to change the method of modulation being used, wherein communication between stations in the network is being performed using a first modulation method, by initiating a change in the modulation method being used by sending a control message containing identification of a second modulation method to other stations to inform them of the second modulation method; allowing the other stations to change the modulation method used to the second modulation method. The control message further includes a direction to those other stations not changing modulation to the second modulation method to instruct them not to transmit using the first modulation method.
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