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1. WO1996042158 - SYNCHRONIZING THE TRANSMISSION OF DATA VIA A TWO-WAY LINK

Publication Number WO/1996/042158
Publication Date 27.12.1996
International Application No. PCT/SE1996/000773
International Filing Date 13.06.1996
Chapter 2 Demand Filed 10.01.1997
IPC
H04L 7/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
7Arrangements for synchronising receiver with transmitter
H04J 3/06 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
3Time-division multiplex systems
02Details
06Synchronising arrangements
H04J 3/24 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
3Time-division multiplex systems
24in which the allocation is indicated by an address
H04L 12/935 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
70Packet switching systems
931Switch fabric architecture
935Switch interfaces, e.g. port details
H04L 12/937 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
70Packet switching systems
931Switch fabric architecture
937Switch control, e.g. arbitration
H04L 7/10 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
7Arrangements for synchronising receiver with transmitter
04Speed or phase control by synchronisation signals
10Arrangements for initial synchronisation
CPC
H04J 3/0608
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
3Time-division multiplex systems
02Details
06Synchronising arrangements
0602Systems characterised by the synchronising information used
0605Special codes used as synchronising signal
0608Detectors therefor, e.g. correlators, state machines
H04J 3/0697
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
3Time-division multiplex systems
02Details
06Synchronising arrangements
0635Clock or time synchronisation in a network
0685Clock or time synchronisation in a node; Intranode synchronisation
0697Synchronisation in a packet node
H04J 3/247
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
3Time-division multiplex systems
24in which the allocation is indicated by an address ; the different channels being transmitted sequentially
247ATM or packet multiplexing
H04L 2012/5674
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
54Store-and-forward switching systems
56Packet switching systems
5601Transfer mode dependent, e.g. ATM
5672Multiplexing, e.g. coding, scrambling
5674Synchronisation, timing recovery or alignment
H04L 49/254
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
49Packet switching elements
25Routing or path finding through a switch fabric
253Connections establishment or release between ports
254Centralized controller, i.e. arbitration or scheduling
H04L 49/30
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
49Packet switching elements
30Peripheral units, e.g. input or output ports
Applicants
  • TELEFONAKTIEBOLAGET LM ERICSSON [SE]/[SE] (AllExceptUS)
  • PETERSEN, Lars, Göran [SE]/[SE] (UsOnly)
  • KUNDEL, Mikael [SE]/[SE] (UsOnly)
Inventors
  • PETERSEN, Lars, Göran
  • KUNDEL, Mikael
Agents
  • ROSENQUIST, P., O.
Priority Data
9502142-413.06.1995SE
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SYNCHRONIZING THE TRANSMISSION OF DATA VIA A TWO-WAY LINK
(FR) SYNCHRONISATION DE LA TRANSMISSION DE DONNEES VIA UNE LIAISON BIDIRECTIONNELLE
Abstract
(EN)
Transmission in a cell based switch of user cells which can include different numbers of data bits is synchronized. The transmission is performed via a two-way link between functional entities which each includes a link control function containing functions for starting and controlling transmission of data on the link by means of sync cells which are exchanged between the link control functions. The exchange of sync cells is controlled by a sync state machine having three states (304, 308, 312). In a HUNT state (312) the link control function investigates a sync cell coming in from the link for establishing whether it agrees with a predetermined pattern for sync cells. In a PRESYNC state (304), that starts after a sync cell containing the predetermined pattern has been found in the HUNT state, the link control function investigates a predetermined number thereafter incoming consecutive sync cells for establishing whether they contain the predetermined pattern. If this is not the case the control process returns to the HUNT state. In a SYNC state (308), that starts after the predetermined number of sync cells containing the predetermined pattern has been found in the PRESYNC state, transmission of data on the link is admitted while supervising data with respect to faults. If faults are found the control process starts again in the HUNT state.
(FR)
La présente invention concerne la synchronisation de la transmission par un commutateur cellulaire où les cellules utilisateurs peuvent comporter des nombres différents de bits de données. La transmission se fait par une liaison bidirectionnelle entre des entités fonctionnelles qui sont dotées chacune d'un module de gestion de liaison comportant notamment des fonctions de lancement et de régulation de la transmission des données sur la liaison mettant en ÷uvre des cellules de synchronisation échangées entre les modules de gestion de liaison. L'échange des cellules de synchronisation est commandé par un automate fini de synchronisation pouvant prendre trois états (304, 308, 312). A l'état HUNT (312), le module de gestion de liaison vérifie dans une cellule de synchronisation à l'arrivée en provenance de la liaison si elle respecte une configuration prédéfinie des cellules de synchronisation. A l'état PRESYNC (304), qui débute une fois qu'il a été déterminé qu'une cellule de synchronisation contenant la configuration prédéfinie est à l'état HUNT, le module de gestion de liaison vérifie dans une autre quantité prédéfinie de cellules de synchronisation consécutives à l'arrivée si elles contiennent la configuration prédéfinie. Si ce n'est pas le cas, le module de commande repasse à l'état HUNT. A l'état SYNC (308), qui débute après constatation qu'un nombre prédéfini de cellules de synchronisation contenant la configuration prédéfinie se trouve à l'état PRESYNC, la transmission des données sur la liaison est admise, mais avec recherche des données contenant des erreurs. En cas de découverte d'erreurs, le module de commande repasse de nouveau à l'état HUNT.
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