公开(公告)号：DE69231533T2

公开(公告)日：2001-05-31

申请号：DE69231533

申请日：1992-08-13

Applicant: IBM

Inventor： AMES RICHARD NORMAN ,  MOORE VICTOR STUART

IPC: H04Q7/22 ,  H04B7/26 ,  H04L12/28 ,  H04Q7/28 ,  H04L12/56

Abstract: Methods and apparatus are set forth which enable a data communications network (1) to perform decentralised uplink network control functions (decentralised away from the centralised general communications controller (GCC) level of the network hierarchy); (2) to minimise, or in some cases eliminate, the overhead expended in making power lever (signal strength) determinations and assessments at both the GCC and base station levels of the network hierarchy (for the purpose of managing uplink communications); and (3) to allow individual subscriber radios (terminals) to dynamically determine the most desirable base station to communicate with when exchanging information a host computer via a shared RF communication channel (the link between a terminal and the base station). Additionally, an illustrative radio frequency data communication network, built in accordance with the teachings of the invention as a modified version of an existing network, is described where the modified network incorporates the aforementioned methods and apparatus.

公开(公告)号：DE69231533D1

公开(公告)日：2000-11-30

申请号：DE69231533

申请日：1992-08-13

Applicant: IBM

Inventor： AMES RICHARD NORMAN ,  MOORE VICTOR STUART

IPC: H04Q7/22 ,  H04B7/26 ,  H04L12/28 ,  H04Q7/28 ,  H04L12/56

Abstract: Methods and apparatus are set forth which enable a data communications network (1) to perform decentralised uplink network control functions (decentralised away from the centralised general communications controller (GCC) level of the network hierarchy); (2) to minimise, or in some cases eliminate, the overhead expended in making power lever (signal strength) determinations and assessments at both the GCC and base station levels of the network hierarchy (for the purpose of managing uplink communications); and (3) to allow individual subscriber radios (terminals) to dynamically determine the most desirable base station to communicate with when exchanging information a host computer via a shared RF communication channel (the link between a terminal and the base station). Additionally, an illustrative radio frequency data communication network, built in accordance with the teachings of the invention as a modified version of an existing network, is described where the modified network incorporates the aforementioned methods and apparatus.

公开(公告)号：AU3392778A

公开(公告)日：1979-09-13

申请号：AU3392778

申请日：1978-03-07

Applicant: IBM

Inventor： AMES RICHARD NORMAN ,  HARDIN DICK KAYLOR ,  LEININGER JOEL CALVIN ,  TAYLOR GEORGE PHILLIPS

IPC: G06F13/12 ,  G06F7/00 ,  G06F9/38 ,  G06F13/38 ,  G06F15/16 ,  G06F15/17 ,  G06F15/177 ,  G06F3/00 ,  G06F9/16

Abstract: An interface comprising normal asynchronous I/O interface hardware in combination with certain additional synchronizing connections is provided between a microcoded central processing unit (CPU) and a microcoded secondary processor (such as a floating point processor) for enabling these processors to function conjointly under common timing control as though they were natively attached to each other insofar as the execution of their respective microcodes is concerned. The secondary processor shares the normal I/O interface with the I/O devices for data transfer purposes in such fashion that data can be transferred between any of the I/O devices and the CPU in cycle steal mode when the secondary processor is internally occupied with executing an operation delegated to it by the central processor, and when the secondary processor is ready to store data which it has produced, I/O data transfers in cycle steal mode can be made concurrently with data transfers between the secondary processor and the CPU on a demand multiplex basis. Coordinating signals are passed between the processors at certain steps during the execution of their respective microcodes to maintain these microcodes in proper timed relationship with each other.

公开(公告)号：DE2817183A1

公开(公告)日：1978-11-09

申请号：DE2817183

申请日：1978-04-20

Applicant: IBM

Inventor： AMES RICHARD NORMAN ,  HARDIN DICK KAYLOR ,  LEININGER JOEL CALVIN ,  TAYLOR GEORGE PHILLIPS

IPC: G06F13/12 ,  G06F7/00 ,  G06F9/38 ,  G06F13/38 ,  G06F15/16 ,  G06F15/17 ,  G06F15/177 ,  G06F9/18 ,  G06F13/06

Abstract: An interface comprising normal asynchronous I/O interface hardware in combination with certain additional synchronizing connections is provided between a microcoded central processing unit (CPU) and a microcoded secondary processor (such as a floating point processor) for enabling these processors to function conjointly under common timing control as though they were natively attached to each other insofar as the execution of their respective microcodes is concerned. The secondary processor shares the normal I/O interface with the I/O devices for data transfer purposes in such fashion that data can be transferred between any of the I/O devices and the CPU in cycle steal mode when the secondary processor is internally occupied with executing an operation delegated to it by the central processor, and when the secondary processor is ready to store data which it has produced, I/O data transfers in cycle steal mode can be made concurrently with data transfers between the secondary processor and the CPU on a demand multiplex basis. Coordinating signals are passed between the processors at certain steps during the execution of their respective microcodes to maintain these microcodes in proper timed relationship with each other.

公开(公告)号：DE69224451T2

公开(公告)日：1998-09-24

申请号：DE69224451

申请日：1992-06-25

Applicant: IBM

Inventor： AMES RICHARD NORMAN ,  KLUDT THOMAS WARREN ,  MOORE VICTOR STUART

IPC: H04B7/26 ,  H04L12/28 ,  H04W84/16

Abstract: A digital communication network has a plurality of remote terminals (RTs) which communicate with a plurality of base stations (BSs) by radio links operating at a single frequency. Each RT monitors the signal strengths of outbound messages and keeps an ordered table indicating which BSs produce the highest strength signals. At sign-on, an RT sends a message to the BS at the top of the list. The message includes the first predetermined number of entries at the top of the list. Each BS monitors the number of RTs it can hear and the number of users attached to each BS. The BS to which the sign-on message is sent then decides on the basis of signal strength, number of users attached, and BS coverage which BS should be attached to the particular RT and then notifies a communications controller. Such decision thus levels the workload. Each RT monitors errors and requests re-evaluation of attachment when the error rate for the BS to which it is attached exceeds a predetermined value.

公开(公告)号：CA2068009C

公开(公告)日：1998-05-19

申请号：CA2068009

申请日：1992-05-05

Applicant: IBM

Inventor： AMES RICHARD NORMAN ,  MOORE VICTOR STUART

IPC: H04Q7/22 ,  H04B7/26 ,  H04L12/28 ,  H04Q7/28 ,  H04L12/56 ,  H04B7/10 ,  H04L5/16 ,  H04B7/185 ,  H04Q7/20 ,  H04L12/52

Abstract: Methods and apparatus are set forth which enable a radio frequency data communications network (1) to perform decentralized uplink network control functions (decentralized away from the centralized general communications contro ller (GCC) level of the network hierarchy); (2) to minimize, or in some cases elimina te, the overhead expended in making power lever (signal strength) determinations and assessments at both the GCC and base station levels of the network hierarchy (fo r the purpose of managing uplink communications); and (3) to allow individual subscrib er radios (terminals) to dynamically determine the most desirable base station to communicate with when exchanging information a host computer via a shared RF communication channel (the link between a terminal and the base station). Additionally, an illustrative radio frequency data communication network, built in accordance with the teachings of the invention as a modified version of an exist ing network, is described where the modified network incorporates the aforementioned methods and apparatus.

公开(公告)号：DE69224451D1

公开(公告)日：1998-03-26

申请号：DE69224451

申请日：1992-06-25

Applicant: IBM

Inventor： AMES RICHARD NORMAN ,  KLUDT THOMAS WARREN ,  MOORE VICTOR STUART

IPC: H04B7/26 ,  H04L12/28 ,  H04W84/16

Abstract: A digital communication network has a plurality of remote terminals (RTs) which communicate with a plurality of base stations (BSs) by radio links operating at a single frequency. Each RT monitors the signal strengths of outbound messages and keeps an ordered table indicating which BSs produce the highest strength signals. At sign-on, an RT sends a message to the BS at the top of the list. The message includes the first predetermined number of entries at the top of the list. Each BS monitors the number of RTs it can hear and the number of users attached to each BS. The BS to which the sign-on message is sent then decides on the basis of signal strength, number of users attached, and BS coverage which BS should be attached to the particular RT and then notifies a communications controller. Such decision thus levels the workload. Each RT monitors errors and requests re-evaluation of attachment when the error rate for the BS to which it is attached exceeds a predetermined value.