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1. WO1996004725 - UPLINK/DOWNLINK COLLISION AVOIDANCE

Publication Number WO/1996/004725
Publication Date 15.02.1996
International Application No. PCT/US1995/005950
International Filing Date 15.05.1995
IPC
H04L 12/28 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
28characterised by path configuration, e.g. LAN or WAN
CPC
H04W 24/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
24Supervisory, monitoring or testing arrangements
H04W 72/12
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
12Dynamic; Wireless traffic scheduling ; ; Dynamically scheduled allocation on shared channel
H04W 74/0816
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
08Non-scheduled ; or contention based; access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
0808using carrier sensing, e.g. as in CSMA
0816carrier sensing with collision avoidance
H04W 88/08
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
88Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
08Access point devices
Applicants
  • MOTOROLA INC. [US/US]; 1303 East Algonquin Road Schaumburg, IL 60196, US
Inventors
  • TRAN, Phieu, Moc; US
  • SMOLINSKE, Jeffrey, C.; US
  • SCHEIBEL, Robert, C., Jr.; US
  • CLANTON, Christopher, L.; US
Agents
  • STOCKLEY, Darleen, J. ; Motorola Inc. Intellectual Property Dept. 1303 East Algonquin Road Schaumburg, IL 60196, US
Priority Data
08/282,83329.07.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) UPLINK/DOWNLINK COLLISION AVOIDANCE
(FR) PARADE AUX COLLISIONS ENTRE LIAISON MONTANTE ET LIAISON DESCENDANTE
Abstract
(EN)
Collision avoidance is maximized by placing collision avoidance scheduling in a central access manager. The central access manager coordinates downlink transmissions of a base site with the uplink transmissions by subscriber units, virtually avoiding collisions of the two types of transmissions. The subscriber units utilize a waiting period (204, 206) prior to transmission of packets to permit the central access manager to maintain the scheduling.
(FR)
Système permettant d'éviter au maximum les collisions grâce à l'introduction, dans le système central de gestion d'accès, d'un planning d'évitement des collisions. Le système central de gestion d'accès coordonne les émissions descendantes provenant de la station de base et les émissions montantes provenant des unités d'abonnés, évitant essentiellement les collisions entre les deux types d'émission. Les unités d'abonnés utilisent un délai d'attente (204, 206) avant d'émettre les paquets, pour permettre au système central de gestion d'accès de maintenir le planning.
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