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：DE69427404T2

公开(公告)日：2001-11-08

申请号：DE69427404

申请日：1994-10-26

Applicant: IBM

Inventor： KRISHNA ARVIND ,  MARTINEZ JOSE LOUIS ,  NATARAJAN KADATHUR ,  WETTERWALD MICHELLE ,  AHMADI HAMID ,  BANTZ DAVID ,  BAUCHOT FREDERIC ,  HARRISON COLIN

IPC: H04B1/713 ,  H04B1/715 ,  H04L12/28 ,  H04L12/56 ,  H04W16/12 ,  H04W28/26 ,  H04W72/00 ,  H04W84/12 ,  H04W88/08 ,  H04Q7/36

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：SG33353A1

公开(公告)日：1996-10-18

申请号：SG1995000359

申请日：1995-04-28

Applicant: IBM

Inventor： KRISHNA ARVIND ,  KANDLUR DILIP DINKAR ,  HEINRICH HARLEY KENT ,  CHAN SHUN SHING

IPC: H04Q7/12

公开(公告)号：CA2113750A1

公开(公告)日：1994-10-31

申请号：CA2113750

申请日：1994-01-19

Applicant: IBM

Inventor： AHAMDI HAMID ,  BAR-NOY AMOTZ ,  KESSLER ILAN ,  KRISHNA ARVIND

IPC: H04L12/28 ,  H04W4/06 ,  H04W16/02 ,  H04W16/10 ,  H04W16/14 ,  H04W72/08 ,  H04W72/12 ,  H04W74/00 ,  H04W84/04 ,  H04W84/12 ,  H04B7/26

Abstract: A method of dynamically allocating bandwidth of channels to cells in a communications cellular network according to user demand. Disjoint groups of cells are formed so as to minimize interference within each group, and a particular channel is assigned to each of the groups. The bandwidth of each channel then dynamically allocated by time division to each of the cells in a group according to user demand in each of the cells.

公开(公告)号：DE69427611T2

公开(公告)日：2002-05-29

申请号：DE69427611

申请日：1994-04-15

Applicant: IBM

Inventor： AHMADI HAMID ,  BAR-NOY AMOTZ ,  KESSLER ILAN ,  KRISHNA ARVIND

IPC: H04L12/28 ,  H04W4/06 ,  H04W16/02 ,  H04W16/10 ,  H04W16/14 ,  H04W72/08 ,  H04W72/12 ,  H04W74/00 ,  H04W84/04 ,  H04W84/12 ,  H04Q7/38

Abstract: A method of dynamically allocating bandwidth of channels to cells in a communications cellular network according to user demand. Disjoint groups of cells are formed so as to minimize interference within each group, and a particular channel is assigned to each of the groups. The bandwidth of each channel then dynamically allocated by time division to each of the cells in a group according to user demand in each of the cells.

公开(公告)号：DE69427611D1

公开(公告)日：2001-08-09

申请号：DE69427611

申请日：1994-04-15

Applicant: IBM

Inventor： AHMADI HAMID ,  BAR-NOY AMOTZ ,  KESSLER ILAN ,  KRISHNA ARVIND

IPC: H04L12/28 ,  H04W4/06 ,  H04W16/02 ,  H04W16/10 ,  H04W16/14 ,  H04W72/08 ,  H04W72/12 ,  H04W74/00 ,  H04W84/04 ,  H04W84/12 ,  H04Q7/38

Abstract: A method of dynamically allocating bandwidth of channels to cells in a communications cellular network according to user demand. Disjoint groups of cells are formed so as to minimize interference within each group, and a particular channel is assigned to each of the groups. The bandwidth of each channel then dynamically allocated by time division to each of the cells in a group according to user demand in each of the cells.

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.