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1. (WO2003096598) METHOD TO CHECK COMMUNICATION LINK RELIABILITY
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2003/096598 International Application No.: PCT/US2003/015198
Publication Date: 20.11.2003 International Filing Date: 13.05.2003
Chapter 2 Demand Filed: 10.12.2003
IPC:
H04L 1/00 (2006.01) ,H04L 1/16 (2006.01) ,H04L 1/18 (2006.01) ,H04L 1/24 (2006.01) ,H04L 5/14 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
12
by using return channel
16
in which the return channel carries supervisory signals, e.g. repetition request signals
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
12
by using return channel
16
in which the return channel carries supervisory signals, e.g. repetition request signals
18
Automatic repetition systems, e.g. van Duuren system
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
24
Testing correct operation
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
5
Arrangements affording multiple use of the transmission path
14
Two-way operation using the same type of signal, i.e. duplex
Applicants:
QUALCOMM, INCORPORATED [US/US]; 5775 Morehouse Drive San Diego, CA 92121, US
Inventors:
MALLADI, Durga, P.; US
VAYANOS, Alkinoos, Hector; US
Agent:
WADSWORTH, Philip, R. ; 5775 Morehouse Drive San Diego, CA 92121, US
Priority Data:
10/145,43013.05.2002US
Title (EN) METHOD TO CHECK COMMUNICATION LINK RELIABILITY
(FR) PROCEDE PERMETTANT DE CONTROLER LA FIABILITE DE LIAISONS DE COMMUNICATIONS
Abstract:
(EN) Techniques to mitigate the effects of link imbalance for the uplink between a terminal (or UE) and multiple base stations (or Node Bs). In one aspect, the serving base station (i.e., the one designated to transmit packet data to the terminal) monitors the uplink received SNR for each terminal designated to receive packet data transmission. The serving base station then determines, based on the uplink received SNR and an SNR threshold, whether or not link imbalance potentially exists for each such terminal. In another aspect, if it is determined that link imbalance potentially exists, then a 3-way handshake is performed to check the reliability of a feedback mechanism used for packet data transmission. Appropriate responsive actions may then be performed based on the result of the check.
(FR) L'invention concerne des techniques permettant d'atténuer les effets d'un déséquilibre de liaison pour la liaison montante entre un terminal (ou UE) et plusieurs stations de base (ou station de base Noeud). Dans un aspect, la station de base de desserte (c'est-à-dire, la station de base conçue pour transmettre au terminal les données en paquet) surveille le rapport signal/bruit (SNR) d'une liaison montante reçue pour chaque terminal destiné à recevoir la transmission de données en paquet. La station de base de desserte détermine ensuite, en fonction du SNR d'une liaison montante reçue et d'un seuil de SNR, si un déséquilibre de liaison existe potentiellement pour chaque terminal. Dans un autre aspect, s'il a été déterminé qu'un déséquilibre de liaison existe potentiellement, une liaison triangulaire est établie afin de contrôler la fiabilité d'un mécanisme de rétroaction utilisé pour la transmission de données en paquet. Des actions de réponse appropriées peuvent ensuite être entreprises en fonction du résultat du contrôle.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NI, NO, NZ, OM, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
KR1020040106541KR1020100023052EP1504556JP2005525744JP4422608CN1669260
AU2003229082