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1. WO1996039749 - TIMING ADJUSTMENT CONTROL FOR EFFICIENT TIME DIVISION DUPLEX COMMUNICATION

Publication Number WO/1996/039749
Publication Date 12.12.1996
International Application No. PCT/US1996/007905
International Filing Date 28.05.1996
Chapter 2 Demand Filed 02.01.1997
IPC
H04B 1/707 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
707using direct sequence modulation
H04B 7/26 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
24for communication between two or more posts
26at least one of which is mobile
H04J 13/00 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
13Code division multiplex systems
H04J 3/06 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
3Time-division multiplex systems
02Details
06Synchronising arrangements
H04W 56/00 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
56Synchronisation arrangements
CPC
H04B 1/7093
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
707using direct sequence modulation
709Correlator structure
7093Matched filter type
H04B 7/2681
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
24for communication between two or more posts
26at least one of which is mobile
2662Arrangements for Wireless System Synchronisation
2671Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
2678Time synchronisation
2681Synchronisation of a mobile station with one base station
H04J 2013/0037
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
13Code division multiplex systems
0007Code type
0037Multilevel codes
H04J 3/0682
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
3Time-division multiplex systems
02Details
06Synchronising arrangements
0635Clock or time synchronisation in a network
0682by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
H04W 56/0045
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
56Synchronisation arrangements
004compensating for timing error of reception due to propagation delay
0045compensating for timing error by altering transmission time
H04W 56/0055
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
56Synchronisation arrangements
0055determining timing error of reception due to propagation delay
Applicants
  • OMNIPOINT CORPORATION [US]/[US] (AllExceptUS)
  • SCOTT, Logan [US]/[US] (UsOnly)
Inventors
  • SCOTT, Logan
Agents
  • HEMMINGER, Steven, D.
Priority Data
08/463,22005.06.1995US
08/464,28505.06.1995US
08/465,13705.06.1995US
08/465,55505.06.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) TIMING ADJUSTMENT CONTROL FOR EFFICIENT TIME DIVISION DUPLEX COMMUNICATION
(FR) COMMANDE DE REGLAGE DE SYNCHRONISATION SERVANT A REALISER DES TELECOMMUNICATIONS EN DUPLEX A REPARTITION DANS LE TEMPS
Abstract
(EN)
A system for time division duplex communication over a single frequency band wherein guard time overhead is reduced by active adjustment of reverse link transmission timing as a function of round trip propagation delay. Responding to a polling message from the base station, a user station seeking to establish communication transmits a reply message. The base station using a propagation delay calculator (812) calculates the distance of the user station by measuring the propagation delay with respect to receipt of the reply message and a timing control unit (806) and transmitter (807) for sending a timing adjustment command to the user station instructing it to advance or retard its timing. Thereafter, the base station monitors the user station transmissions and periodically commands it to adjust its timing in a like manner. The user station transmits a control preamble at the start of each time slot to allow the base station to perform round trip timing calculations and adjustment of the user station's power or antenna selection.
(FR)
Système servant à réaliser des télécommunications en duplex à répartition dans le temps sur une seule bande de fréquence, ce qui permet de diminuer le dépassement du temps de protection par réglage actif de la synchronisation de la transmission à liaison inverse en fonction du temps de propagation aller-retour. En réaction à un message d'interrogation émis par la station de base, une station usager cherchant à établir une communication, émet un message de réponse. La station de base, au moyen d'un calculateur de temps de propagation (812), calcule la distance à laquelle se trouve la station usager par mesure du temps de propagation par rapport à la réception du message de réponse et en utilisant un ensemble de commande de synchronisation (806), ainsi qu'un émetteur (807), pour envoyer une instruction de réglage de synchronisation à la station usager, en lui donnant l'ordre d'avancer ou de retarder sa synchronisation. La station de base contrôle ensuite les émissions de la station usager et lui donne l'ordre périodiquement de régler sa synchronisation de façon similaire. La station usager émet un préambule de commande au départ de chaque tranche de temps, afin de permettre à la station de base d'effectuer des calculs de synchronisation aller-retour, ainsi que des réglages de la puissance ou de la sélection d'antenne de la station usager.
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