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WO2008046822A1 - Procédé de contrôle de retransmissions de données multi-diffusion extensibles - Google Patents

Procédé de contrôle de retransmissions de données multi-diffusion extensibles Download PDF

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Publication number
WO2008046822A1
WO2008046822A1 PCT/EP2007/061017 EP2007061017W WO2008046822A1 WO 2008046822 A1 WO2008046822 A1 WO 2008046822A1 EP 2007061017 W EP2007061017 W EP 2007061017W WO 2008046822 A1 WO2008046822 A1 WO 2008046822A1
Authority
WO
WIPO (PCT)
Prior art keywords
information
uts
multicast
retransmissions
group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2007/061017
Other languages
English (en)
Inventor
Elena Costa
Matthias Lott
Jijun Luo
Egon Schulz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks GmbH and Co KG
Original Assignee
Nokia Siemens Networks GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Siemens Networks GmbH and Co KG filed Critical Nokia Siemens Networks GmbH and Co KG
Priority to EP07821383A priority Critical patent/EP2076991A1/fr
Publication of WO2008046822A1 publication Critical patent/WO2008046822A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1874—Buffer management
    • H04L1/1877—Buffer management for semi-reliable protocols, e.g. for less sensitive applications like streaming video
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1835—Buffer management
    • H04L1/1838—Buffer management for semi-reliable protocols, e.g. for less sensitive applications such as streaming video
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0098—Unequal error protection

Definitions

  • the present invention relates to a method for controlling retransmissions of scalable data of multicast services in a radio communications system.
  • Multicast and broadcast services are currently envisaged to play an important role in future operators' service offerings. Nevertheless, the application of frequency-adaptive transmission in the form of link adaptation or adaptive resource allocation is not suitable for such services.
  • MBMS Multicast and broadcast services
  • For broadcasting services by definition the individual receivers are unknown to the transmitting entity, while for multicast services, some of the multicast gain may be lost due to overhead caused by the feedback signalling from all involved users and a degradation of the spectral efficiency due to adap- tation to the worst user channel conditions.
  • the transmit information is composed of "basic information”, which should be correctly received by all users addressed by the multicast services, and "additional” or “nice to have” information, which completes the basis information and enhances its quality.
  • European patent application No. EP06013395.6 filed 28 June, 2006, by Siemens AG, which content is herewith included in its entirety, discloses a transmission method for multicast services with scalable data. It is suggested there to adopt different transmission parameters for the basic information and the additional information, in such a way to guarantee that all UTs receive the basic information, while it is accepted that additional information is received only by UTs experiencing more favorable propagation conditions. No strategy is proposed, however, for the implementation of retransmissions in case of failure of the first transmission.
  • a first aspect of the invention it is proposed to apply retransmission strategies to each of the different levels of transmit information in scalable data service transmissions.
  • different levels of information are prioritised and, hence, have different transmission quality requirements.
  • NACK/ACK channels independent shared return channels, e.g. NACK/ACK channels, for each level of information for transmission of feedback information on for example the transmission quality.
  • different return channels are assigned different levels of capacity, for example the capacity of a return channel for basic information should be larger than for return channels of additional levels of information.
  • a return channel is assigned for a number of levels of information, only, for example to the basic information level or to a small number of levels of information.
  • the access to each return channel is contention based.
  • forward channels i.e. multicast channels, for retransmissions of different level information are assigned different amounts of capacity.
  • a seventh aspect of the invention in case the network determines that no retransmission of basic information is required, also no retransmission of further level information is effected.
  • the network when receiving a negative acknowledgement on a return channel, the network retransmits only information level data corresponding to the return channel.
  • retransmissions of data assigned to different information levels are scheduled. For example, basic information is retransmitted first, followed by retransmission of additional data, if necessary.
  • transmission of feedback information for different information levels in return channels is scheduled.
  • only feedback in- formation relating to received basic information may be transmitted in the return channel.
  • feedback information relating to additional information may be transmitted in the return channel by the receiving UTs.
  • individual timer may be realised for each information level.
  • the group of UTs addressed by multicast transmissions are divided into at least two groups.
  • a first group 0 comprises of UTs for which the network cannot acquire any knowledge about the downlink propagation conditions these UTs experience
  • a second group 1 comprises of UTs for which the network, for example the base station, may acquire such information either indirectly from uplink data transmissions, or directly from the UTs via a feedback channel.
  • the access to a return channel for transmission of basic information is restricted to users of the first group 0, as it can be assumed that parameters for the transmission of basic information are chosen by taking worst propagation conditions of UTs of the second group 1 into account.
  • the network upon receipt of a negative acknowledge on the return channel of the basic information, assigns specific resources on an "ad-hoc" basis for retransmissions to UTs of the first group 0, only.
  • the channel capacity assigned to the groups may be chosen in that first group 0 UTs are assigned a larger capacity than secondn group 1 UTs, wherein, in addition, the individual number of UTs in each of the groups is taken into account when defining the logical channel capacity.
  • the second group's 1 UTs hereafter denoted as gl
  • Transmission parameters of the first level of additional information are chosen so that it is received at least by all UTs in group 1 (and possibly also by UTs of group 0) .
  • the second level of additional information is meant to be received at least by UTs in group gll, the third at least by UTs in gl2 etc.
  • NACK negative acknowlegement
  • the access to the return channel of information level x is re- stricted to users in the user-group glx, only.
  • the message is retransmitted to one UT only via a unicast or dedicated channel.
  • retransmissions will be carried out via multicast to all requiring UTs.
  • the return channel is ac- Switchd by the UTs in contention based mode and a partial collision prevents the identification of the user ID, such that individual user IDs of the UTs cannot be extracted, the retransmission addresses all users via multicast.
  • a nineteenth aspect of the invention it is furthermore proposed to transmit a sequence number of a missing or wrongly received data packet in the NACK message via the return channel.
  • an identical NACK message is chosen for all those terminals.
  • selective-repeat ARQ is efficiently realised.
  • all data packets are retransmitted in- stead, i.e. a so called Go-back-N approach is applied.
  • a twentieth aspect of the invention it is furthermore proposed to combine the aspect of a NACK message comprising a user ID with the aspect of the message compris ⁇ ing the sequence number.
  • the amount of information re- dundancy and return signaling overhead can be adapted to the different QoS (Quality of Service) requirements of the different levels and to their different level of importance in building up the scalable data service. This allows avoiding waste of resources and hence unnecessary degradation of the spectral efficiency.
  • QoS Quality of Service
  • the access to the return channels on a contention base enables a significant reduction of the bandwidth assigned to this. Furthermore, this is particularly suitable for scalable data service transmissions, for which a prioritisation of ad- dressed users/user-groups can be identified in correspondence to the different levels of information, based on their different receiving capabilities. In this way, e.g. as soon as a NACK is received on a return channel from one user, a failure of transmission can be assumed for all users/user-groups with less receiving capability.
  • the BS can, e.g., decide to enhance/reduce the level of redundancy of the first transmission, thus enhancing the reliability and the spectral efficiency of the first transmis- sion.
  • the proposed idea may be applied e.g. for scalable video coding services.
  • a pictorial representation of multicast transmission of scalable data may be found in the older European application No. EP06013395.6.
  • enhancement packet for group glN etc.
  • the retransmission of enhancement packet can be controlled by the sequence of basis information. For instance, if more basic packets need to be retransmitted, to be synchronised in content, more enhancement packets can be retransmitted.
  • SVC Scalable video coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

L'invention concerne un procédé de contrôle de retransmissions de données multi-diffusion extensibles dans un système de communications radio, sachant que les retransmissions de données de différents niveaux d'information sont réalisées différemment.
PCT/EP2007/061017 2006-10-16 2007-10-16 Procédé de contrôle de retransmissions de données multi-diffusion extensibles Ceased WO2008046822A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07821383A EP2076991A1 (fr) 2006-10-16 2007-10-16 Procédé de contrôle de retransmissions de données multi-diffusion extensibles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06021658.7 2006-10-16
EP06021658 2006-10-16

Publications (1)

Publication Number Publication Date
WO2008046822A1 true WO2008046822A1 (fr) 2008-04-24

Family

ID=38963207

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/061017 Ceased WO2008046822A1 (fr) 2006-10-16 2007-10-16 Procédé de contrôle de retransmissions de données multi-diffusion extensibles

Country Status (2)

Country Link
EP (1) EP2076991A1 (fr)
WO (1) WO2008046822A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103238289A (zh) * 2010-12-03 2013-08-07 诺基亚公司 具有即时链路适配和自适应重传器数目的群集内d2d重传

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1301041A1 (fr) * 2001-10-05 2003-04-09 Matsushita Electric Industrial Co., Ltd. Appareil et procédé pour la transmission de données vidéo
WO2003088554A1 (fr) * 2002-04-16 2003-10-23 Koninklijke Philips Electronics N.V. Systeme de transmission a gestion d'encombrements a la reception pour decider de l'eventualite de demandes de retransmission
US6771659B1 (en) * 2000-01-21 2004-08-03 Nokia Mobile Phones Ltd. Method and apparatus for a selective acknowledgement scheme in a modified unacknowledge mode for use over a communications link
US20050129058A1 (en) * 2003-10-08 2005-06-16 Lorenzo Casaccia Method and apparatus for feedback reporting in a wireless communications system
EP1633064A2 (fr) * 1997-02-14 2006-03-08 Robert Bosch Gmbh Méthode pour la transmission des données multimédia.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1633064A2 (fr) * 1997-02-14 2006-03-08 Robert Bosch Gmbh Méthode pour la transmission des données multimédia.
US6771659B1 (en) * 2000-01-21 2004-08-03 Nokia Mobile Phones Ltd. Method and apparatus for a selective acknowledgement scheme in a modified unacknowledge mode for use over a communications link
EP1301041A1 (fr) * 2001-10-05 2003-04-09 Matsushita Electric Industrial Co., Ltd. Appareil et procédé pour la transmission de données vidéo
WO2003088554A1 (fr) * 2002-04-16 2003-10-23 Koninklijke Philips Electronics N.V. Systeme de transmission a gestion d'encombrements a la reception pour decider de l'eventualite de demandes de retransmission
US20050129058A1 (en) * 2003-10-08 2005-06-16 Lorenzo Casaccia Method and apparatus for feedback reporting in a wireless communications system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MAO S ET AL: "RELIABLE TRANSMISSION OF VIDEO OVER AD-HOC NETWORKS USING AUTOMATIC REPEAT REQUEST AND MULTI-PATH TRANSPORT", VTC FALL 2001. IEEE 54TH. VEHICULAR TECHNOLOGY CONFERENCE. PROCEEDINGS. ATLANTIC CITY, NEW JERSEY, OCT. 7 - 11, 2001, IEEE VEHICULAR TECHNOLGY CONFERENCE, NEW YORK, NY : IEEE, US, vol. VOL. 2 OF 4. CONF. 54, 7 October 2001 (2001-10-07), pages 615 - 619, XP001124218, ISBN: 0-7803-7005-8 *
ZHENG H ET AL: "QoS aware mobile video communications", MILITARY COMMUNICATIONS CONFERENCE PROCEEDINGS, 1999. MILCOM 1999. IEEE ATLANTIC CITY, NJ, USA 31 OCT.-3 NOV. 1999, PISCATAWAY, NJ, USA,IEEE, US, 31 October 1999 (1999-10-31), pages 1231 - 1235, XP010369821, ISBN: 0-7803-5538-5 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103238289A (zh) * 2010-12-03 2013-08-07 诺基亚公司 具有即时链路适配和自适应重传器数目的群集内d2d重传
US20130250843A1 (en) * 2010-12-03 2013-09-26 Nokia Corporation Intra-cluster d2d retransmission with instantaneous link adaptation and adaptive number of re-transmitter
US9717069B2 (en) * 2010-12-03 2017-07-25 Nokia Technologies Oy Intra-cluster D2D retransmission with instantaneous link adaptation and adaptive number of re-transmitter

Also Published As

Publication number Publication date
EP2076991A1 (fr) 2009-07-08

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