公开(公告)号：EP0813800A1

公开(公告)日：1997-12-29

申请号：EP96900961

申请日：1996-01-16

Applicant: IBM

Inventor： AHMADI HAMID ,  BAUCHOT FREDERIC JACQUES ,  BONNET ROSELYNE ,  KESSLER ILAN ,  KRISHNA ARVIND ,  LANNE FABIEN P ,  NAGHSHINEH MAHMOUD ,  SOLER CATHERINE ,  WETTERWALD MICHELLE MARIE

IPC: G06F13/00 ,  H04B7/26 ,  H04L12/56 ,  H04L29/06 ,  H04L29/12 ,  H04W8/26 ,  H04W40/24 ,  H04W40/26 ,  H04W40/36 ,  H04W80/04 ,  H04W92/02 ,  H04Q7/24

CPC classification number: H04W92/02 ,  H04L29/12009 ,  H04L45/02 ,  H04L61/00 ,  H04W8/26 ,  H04W40/248 ,  H04W40/26 ,  H04W40/36 ,  H04W80/04

Abstract: A communications network having a number of routers, a number of base stations and a number of mobile units maintains communications with the mobile units by assigning a unique address known to the routing entities of the network to each mobile unit. By including the mobile units unique address in topology updates of the network, the location of the mobile unit at any time is made known to all routers of the network. That is, once a mobile unit moves into a domain of a new access point and establishes a new link with the new access point, it uses the topology update mechanism of the network to make its new location known to all routers. Once a router of the network receives topology update information specific to the mobile unit's new location, it updates its routing table such that packets destined to the mobile unit are routed in a path which terminates at the mobile unit and contains its new access point.

公开(公告)号：CZ292628B6

公开(公告)日：2003-11-12

申请号：CZ265697

申请日：1996-01-16

Applicant: IBM

Inventor： AHMADI HAMID ,  BAUCHOT FREDERIC JACQUES ,  BONNET ROSELYNE ,  KESSLER ILAN ,  KRISHNA ARVIND ,  LANNE FABIEN P ,  NAGHSHINEH MAHMOUD ,  SOLER CATHERINE ,  WETTERWALD MICHELLE MARIE

IPC: G06F13/00 ,  H04B7/26 ,  H04L12/56 ,  H04L29/06 ,  H04L29/12 ,  H04W8/26 ,  H04W40/24 ,  H04W40/26 ,  H04W40/36 ,  H04W80/04 ,  H04W92/02 ,  H04Q7/24

Abstract: A communications network (C100) having a number of routers (R101, R102), a number of base stations (B103, B104, B105) and a certain number of mobile units maintains communications with the mobile units by assigning a unique address known to the routing entities of the network (C100) to each mobile unit. By including the mobile units unique address in topology updates of the network, the location of the mobile unit at any time is made known to all routers (R101, R102) of the network. That is, once a mobile unit moves into a domain of a new access point and establishes a new link with the new access point, it uses the topology update mechanism of the network to make its new location known to all routers (R101, R102). Once a router (R101, R102) of the network receives topology update information specific to the mobile unit's new location, it updates its routing table such that packets destined to the mobile unit are routed in a path which terminates at the mobile unit and contains its new access point.

公开(公告)号：HU9802235A2

公开(公告)日：1999-01-28

申请号：HU9802235

申请日：1996-01-16

Applicant: IBM

Inventor： AHMADI HAMID ,  BAUCHOT FREDERIC JACQUES ,  BONNET ROSELYNE ,  KESSLER ILAN ,  KRISHNA ARVIND ,  LANNE FABIEN P ,  NAGHSHINEH MAHMOUD ,  SOLER CATHERINE ,  WETTERWALD MICHELLE MARIE

IPC: H04B7/26 ,  G06F13/00 ,  H04L12/56 ,  H04L29/06 ,  H04L29/12 ,  H04W8/26 ,  H04W40/24 ,  H04W40/26 ,  H04W40/36 ,  H04W80/04 ,  H04W92/02 ,  H04Q7/24

Abstract: A communications network having a number of routers, a number of base stations and a number of mobile units maintains communications with the mobile units by assigning a unique address known to the routing entities of the network to each mobile unit. By including the mobile units unique address in topology updates of the network, the location of the mobile unit at any time is made known to all routers of the network. That is, once a mobile unit moves into a domain of a new access point and establishes a new link with the new access point, it uses the topology update mechanism of the network to make its new location known to all routers. Once a router of the network receives topology update information specific to the mobile unit's new location, it updates its routing table such that packets destined to the mobile unit are routed in a path which terminates at the mobile unit and contains its new access point.

公开(公告)号：CZ265697A3

公开(公告)日：1998-05-13

申请号：CZ265697

申请日：1996-01-16

Applicant: IBM

Inventor： AHMADI HAMID ,  BAUCHOT FREDERIC JACQUES ,  BONNET ROSELYNE ,  KESSLER ILAN ,  KRISHNA ARVIND ,  LANNE FABIEN P ,  NAGHSHINEH MAHMOUD ,  SOLER CATHERINE ,  WETTERWALD MICHELLE MARIE

IPC: G06F13/00 ,  H04B7/26 ,  H04L12/56 ,  H04L29/06 ,  H04L29/12 ,  H04W8/26 ,  H04W40/24 ,  H04W40/26 ,  H04W40/36 ,  H04W80/04 ,  H04W92/02 ,  H04Q7/24

Abstract: A communications network having a number of routers, a number of base stations and a number of mobile units maintains communications with the mobile units by assigning a unique address known to the routing entities of the network to each mobile unit. By including the mobile units unique address in topology updates of the network, the location of the mobile unit at any time is made known to all routers of the network. That is, once a mobile unit moves into a domain of a new access point and establishes a new link with the new access point, it uses the topology update mechanism of the network to make its new location known to all routers. Once a router of the network receives topology update information specific to the mobile unit's new location, it updates its routing table such that packets destined to the mobile unit are routed in a path which terminates at the mobile unit and contains its new access point.

公开(公告)号：AT199617T

公开(公告)日：2001-03-15

申请号：AT94105696

申请日：1994-04-13

Applicant: IBM

Inventor： AHMADI HAMID ,  BANTZ DAVID FREDERICK ,  BAUCHOT FREDERIC JACQUES ,  KRISHNA ARVIND ,  LA MAIRE RICHARD ORVILLE ,  NATARAJAN KADATHUR S

IPC: H04J3/00 ,  H04B7/24 ,  H04J3/16 ,  H04L12/28 ,  H04L12/56 ,  H04B7/204

Abstract: A Medium Access (MAC) Protocol is utilized for wireless radio access for a plurality of remote stations to a base station on a LAN. The MAC protocol is based on a reservation scheme for user data traffic and a random access technique for control and signalling traffic. There is a time division fixed frame structure in which time is slotted, and time slots are grouped into fixed frames consisting of data and control subframes or periods. The fixed frame structure consists of three periods (A, B, and C) along with their respective headers. The first period, the A period, is the outbound channel which is used exclusively for data transfer from the base station to the remote stations. The following period, the B period, is the inbound channel that is used for contention-free data transfer from the remote stations to the base station. The allocation of the data slots in the A and B periods is performed by the base station. The last period of the frame, designated as the C period, is the control channel used for the transmission of reservation requests and data from the remote stations to the base station in a random-access contention mode using a slotted Aloha protocol. The duration of the three periods may be varied using a movable boundary technique. The base station estimates the number of actively transmitting remote stations utilizing feedback information from the remote stations. This estimate is broadcast to the remote stations as control indicia to control their transmission attempts in the C period, thus yielding high transmission efficiency.

公开(公告)号：AT197216T

公开(公告)日：2000-11-15

申请号：AT96900961

申请日：1996-01-16

Applicant: IBM

Inventor： AHMADI HAMID ,  BAUCHOT FREDERIC JACQUES ,  BONNET ROSELYNE ,  KESSLER ILAN ,  KRISHNA ARVIND ,  LANNE FABIEN P ,  NAGHSHINEH MAHMOUD ,  SOLER CATHERINE ,  WETTERWALD MICHELLE MARIE

IPC: G06F13/00 ,  H04B7/26 ,  H04L12/56 ,  H04L29/06 ,  H04L29/12 ,  H04W8/26 ,  H04W40/24 ,  H04W40/26 ,  H04W40/36 ,  H04W80/04 ,  H04W92/02 ,  H04Q7/24

Abstract: A communications network having a number of routers, a number of base stations and a number of mobile units maintains communications with the mobile units by assigning a unique address known to the routing entities of the network to each mobile unit. By including the mobile units unique address in topology updates of the network, the location of the mobile unit at any time is made known to all routers of the network. That is, once a mobile unit moves into a domain of a new access point and establishes a new link with the new access point, it uses the topology update mechanism of the network to make its new location known to all routers. Once a router of the network receives topology update information specific to the mobile unit's new location, it updates its routing table such that packets destined to the mobile unit are routed in a path which terminates at the mobile unit and contains its new access point.

公开(公告)号：CZ9702656A3

公开(公告)日：1998-05-13

申请号：CZ265697

申请日：1996-01-16

Applicant: IBM

Inventor： AHMADI HAMID ,  BAUCHOT FREDERIC JACQUES ,  BONNET ROSELYNE ,  KESSLER ILAN ,  KRISHNA ARVIND ,  LANNE FABIEN P ,  NAGHSHINEH MAHMOUD ,  SOLER CATHERINE ,  WETTERWALD MICHELLE MARIE

IPC: G06F13/00 ,  H04B7/26 ,  H04L12/56 ,  H04L29/06 ,  H04L29/12 ,  H04W8/26 ,  H04W40/24 ,  H04W40/26 ,  H04W40/36 ,  H04W80/04 ,  H04W92/02 ,  H04Q7/24

CPC classification number: H04W92/02 ,  H04L29/12009 ,  H04L45/02 ,  H04L61/00 ,  H04W8/26 ,  H04W40/248 ,  H04W40/26 ,  H04W40/36 ,  H04W80/04

公开(公告)号：DE69426788T2

公开(公告)日：2001-08-02

申请号：DE69426788

申请日：1994-04-13

Applicant: IBM

Inventor： AHMADI HAMID ,  BANTZ DAVID FREDERICK ,  BAUCHOT FREDERIC JACQUES ,  KRISHNA ARVIND ,  LA MAIRE RICHARD ORVILLE ,  NATARAJAN KADATHUR S

IPC: H04J3/00 ,  H04B7/24 ,  H04J3/16 ,  H04L12/28 ,  H04L12/56 ,  H04B7/204

Abstract: A Medium Access (MAC) Protocol is utilized for wireless radio access for a plurality of remote stations to a base station on a LAN. The MAC protocol is based on a reservation scheme for user data traffic and a random access technique for control and signalling traffic. There is a time division fixed frame structure in which time is slotted, and time slots are grouped into fixed frames consisting of data and control subframes or periods. The fixed frame structure consists of three periods (A, B, and C) along with their respective headers. The first period, the A period, is the outbound channel which is used exclusively for data transfer from the base station to the remote stations. The following period, the B period, is the inbound channel that is used for contention-free data transfer from the remote stations to the base station. The allocation of the data slots in the A and B periods is performed by the base station. The last period of the frame, designated as the C period, is the control channel used for the transmission of reservation requests and data from the remote stations to the base station in a random-access contention mode using a slotted Aloha protocol. The duration of the three periods may be varied using a movable boundary technique. The base station estimates the number of actively transmitting remote stations utilizing feedback information from the remote stations. This estimate is broadcast to the remote stations as control indicia to control their transmission attempts in the C period, thus yielding high transmission efficiency.

公开(公告)号：CA2170786C

公开(公告)日：2001-07-03

申请号：CA2170786

申请日：1996-03-01

Applicant: IBM

Inventor： NAGHSHINEH MAHMOUD ,  SOLER CATHERINE ,  KRISHNA ARVIND ,  LANNE FABIEN P ,  AHMADI HAMID ,  BAUCHOT FREDERIC JACQUES ,  BONNET ROSELYNE ,  KESSLER ILAN ,  WETTERWALD MICHELLE MARIE

IPC: G06F13/00 ,  H04B7/26 ,  H04L12/56 ,  H04L29/06 ,  H04L29/12 ,  H04W8/26 ,  H04W40/24 ,  H04W40/26 ,  H04W40/36 ,  H04W80/04 ,  H04W92/02 ,  H04L12/46

Abstract: A communications network having a number of routers, a number of base statio ns and a number of mobile units maintains communications with the mobile units by assigning a unique address known to the routing entities of the network to e ach mobile unit. By including the mobile units unique address in topology update s of the network, the location of the mobile unit at any time is made known to all ro uters of the network. That is, once a mobile unit moves into a domain of a new access point and establishes a new link with the new access point, it uses the topology u pdate mechanism of the network to make its new location known to all routers. Once a router of the network receives topology update information specific to the m obile unit's new location, it updates its routing table such that packets destined to the mobile unit are routed in a path which terminates at the mobile unit and con tains its new access point.

公开(公告)号：DE69426788D1

公开(公告)日：2001-04-12

申请号：DE69426788

申请日：1994-04-13

Applicant: IBM

Inventor： AHMADI HAMID ,  BANTZ DAVID FREDERICK ,  BAUCHOT FREDERIC JACQUES ,  KRISHNA ARVIND ,  LA MAIRE RICHARD ORVILLE ,  NATARAJAN KADATHUR S

IPC: H04J3/00 ,  H04B7/24 ,  H04J3/16 ,  H04L12/28 ,  H04L12/56 ,  H04B7/204

Abstract: A Medium Access (MAC) Protocol is utilized for wireless radio access for a plurality of remote stations to a base station on a LAN. The MAC protocol is based on a reservation scheme for user data traffic and a random access technique for control and signalling traffic. There is a time division fixed frame structure in which time is slotted, and time slots are grouped into fixed frames consisting of data and control subframes or periods. The fixed frame structure consists of three periods (A, B, and C) along with their respective headers. The first period, the A period, is the outbound channel which is used exclusively for data transfer from the base station to the remote stations. The following period, the B period, is the inbound channel that is used for contention-free data transfer from the remote stations to the base station. The allocation of the data slots in the A and B periods is performed by the base station. The last period of the frame, designated as the C period, is the control channel used for the transmission of reservation requests and data from the remote stations to the base station in a random-access contention mode using a slotted Aloha protocol. The duration of the three periods may be varied using a movable boundary technique. The base station estimates the number of actively transmitting remote stations utilizing feedback information from the remote stations. This estimate is broadcast to the remote stations as control indicia to control their transmission attempts in the C period, thus yielding high transmission efficiency.