WO2009156930A1 - Procédé d'attribution de ressources de transmission dans un système de télécommunication - Google Patents

Procédé d'attribution de ressources de transmission dans un système de télécommunication Download PDF

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Publication number
WO2009156930A1
WO2009156930A1 PCT/IB2009/052649 IB2009052649W WO2009156930A1 WO 2009156930 A1 WO2009156930 A1 WO 2009156930A1 IB 2009052649 W IB2009052649 W IB 2009052649W WO 2009156930 A1 WO2009156930 A1 WO 2009156930A1
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WO
WIPO (PCT)
Prior art keywords
carrier frequency
transmission
signalling channel
transmitted
cell
Prior art date
Application number
PCT/IB2009/052649
Other languages
English (en)
Inventor
Matthew P.J. Baker
Timothy J. Moulsley
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2009156930A1 publication Critical patent/WO2009156930A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present invention relates to a method for allocating transmission resources in a telecommunication system, a system of telecommunication using this method, a primary station and a secondary station using the same method.
  • This invention is, for example, relevant for Multiple-cell or multiple-carrier transmission systems such as dual-cell High-Speed Downlink Packet Access HSDPA for Universal Mobile Telecommunications System UMTS.
  • a dual-carrier (otherwise known as dual-cell) packet transmission system transmits data packets from a primary station to a secondary station using two different carrier frequencies. Data packets may be transmitted to the secondary station on both carrier frequencies simultaneously, or on each carrier frequency at different times.
  • Each data packet is carried on a data packet channel called High-Speed Downlink Shared Channel HS-DSCH on one or other carrier frequency.
  • Signalling information corresponding to each packet to enable the secondary station to decode the packet is carried on a separate signalling channel called High Speed Shared Control CHannel HS-SCCH.
  • the signalling information for each data packet is carried on a separate HS-SCCH, conventionally using the same carrier frequency as the corresponding data packet.
  • a separate HS-SCCH conventionally using the same carrier frequency as the corresponding data packet.
  • each carrier frequency must be able to transmit as many HS-SCCHs as the maximum number of packets that will be simultaneously transmitted to the secondary stations.
  • each HS-SCCH is assigned a dedicated transmission resource (e.g. in time, sub-carrier frequency or channelisation code), and any such transmission resource allocated to HS-SCCHs cannot be used for data transmission.
  • the maximum data transmission rate on a carrier frequency is constrained by the number of HS-SCCHs allocated on the carrier frequency. This is particularly problematic in cases where the channels are separated by codes allocated from a tree with different spreading factors (corresponding to different data rates) at different levels of the tree.
  • spreading factor 16 codes are used for HS-DSCH transmission, while spreading factor SF 128 codes are used for HS- SCCHs.
  • a spreading factor SF 16 code cannot be used for HS-DSCH transmission if any of the leaf-node spreading factor 128 codes descended from it are allocated to an HS-SCCH, as illustrated in Figure 1.
  • a method for allocating resources for transmissions from a secondary station to a primary station comprising a step of configuring a control signalling channel to relate to the transmission of a data packet transmitted either on the same carrier frequency as that on which the control signalling channel is transmitted or on a different carrier frequency.
  • the invention is based on the recognition that, due to unequal numbers of channels being configured on different carrier frequencies, one carrier frequency may suffer a substantial reduction in data transmission capacity as a result of configuring an additional signalling channel, whereas another carrier frequency may be able to accommodate an additional signalling channel without any impact on data transmission capacity.
  • each signalling channel is configured to indicate data packets being transmitted on one of a plurality of carrier frequencies.
  • a second carrier frequency can carry the signalling channel on behalf of the first carrier frequency, the signalling channel being configured to indicate the data transmission on the first carrier frequency (e.g. by configuring a mapping between the channelisation code used for the signalling channel and the carrier frequency to be used for the data transmission).
  • the configuration of the signalling channel is fixed for a plurality of data packets, for example by configuring using higher- layer signalling at the time the signalling channel is set up the carrier frequency to which the signalling channel relates.
  • the configuration of the signalling channel is dynamic, in that the signalling channel itself carries an indication of the carrier frequency to which it relates for each data packet independently.
  • the indication of the carrier frequency may be determined according to the ordering of the signalling channels according to some attribute of the signalling channels. For example, if two signalling channels are received, the one with the lowest channelisation code number relates to a transmission on the first carrier frequency, while the one with the higher channelisation code number indicates the second carrier frequency.
  • the different carrier frequencies may instead be different scrambling codes.
  • Fig. 1 illustrates a code allocation scheme
  • Fig.2 is a block diagram of a system comprising a primary station and a secondary in accordance with the invention; - Fig. 3 shows Offset CQI reporting patterns;
  • Fig. 4 shows delayed ACK/NACK transmission
  • Fig. 5 shows CQI reporting in conjunction with staggered ACK/NACK.
  • the present invention relates to a system of communication 300 as depicted in Figure 2, comprising a primary station 100, like a base station, and at least one secondary station 200 like a mobile station.
  • the radio system 300 may comprise a plurality of the primary stations 100 and/or a plurality of secondary stations 200 (also noted UE for User Equipment).
  • the primary station 100 comprises a transmitter means 110 and a receiving means 120.
  • An output of the transmitter means 110 and an input of the receiving means 120 are coupled to an antenna 130 by a coupling means 140, which may be for example a circulator or a changeover switch.
  • Coupled to the transmitter means 110 and receiving means 120 is a control means 150, which may be for example a processor.
  • the secondary station 200 comprises a transmitter means 210 and a receiving means 220.
  • An output of the transmitter means 210 and an input of the receiving means 220 are coupled to an antenna 230 by a coupling means 240, which may be for example a circulator or a changeover switch.
  • the present invention provides a means of configuring a control signalling channel to relate to the transmission of a data packet transmitted either on the same carrier frequency as that on which the control signalling channel is transmitted or on a different carrier frequency. This enables the allocation of transmission resources on each carrier frequency to be optimally allocated between control signalling channels and data transmission channels.
  • the DL Orthogonal Variable Spreading Factor OVSF code space is more than doubled by the provision of a second carrier which does not have to carry all the channels which have to be carried in a normal cell. Therefore the need to avoid doubling the number of HS-SCCH codes is not so critical as it was in the MIMO case. If a single HS-SCCH approach were to be chosen, the HS-SCCH set for each UE could be semi- statically configured to be on in either one cell or the other.
  • the total number of SF 16 codes available for data transmission could be maximised: if one cell would lose another SF 16 code for HS-DSCH transmission by allocating another HS-SCCH, the HS- SCCH could instead be carried by the other cell, thus optimising the usage of the code trees in the two cells.
  • the anchor cell which has to provide other channels is likely to risk blocking SF 16 codes from HS-DSCH usage if too many HS-SCCH codes have to be provided.
  • each HS-SCCH in the monitored set of a UE would be configured by Radio Resource Control RRC signalling to relate to one cell or the other.
  • the monitored set size could be reduced by means of one bit in the HS-SCCH part 1 to indicate which cell it related to.
  • the solution selected for the HS-DPCCH depends on the solution selected for the HS- SCCH. If a single combined HS-SCCH is selected, the Rel-7 MIMO design of HS-DPCCH can be almost completely re-used for dual-cell operation, with the exception that the PCI bits are not needed. This would avoid concerns regarding cubic metric arising from the transmission of multiple codes.
  • the joint ACK/NACK (Acknowledgment / Non-acknowledgment) signalling of the MIMO HS-DPCCH does not allow the possibility that only one of the HS-SCCHs was detected. This suggests that two HS-DPCCHs should be used to allow fully independent ACK/NACK signalling.
  • Channel Quality Indication CQI does not need to be transmitted in every subframe. If a reporting periodicity greater than one subframe is configured, a sub frame offset could be applied to the CQI reporting pattern for one of the cells so that the CQI reports for the two cells never occur in the same sub frames.
  • Making the subframe offset configurable by RRC signalling on a UE- specific basis would allow a cell-edge UE to benefit from the reduced peak power, while UEs closer to the centre of the cell could transmit their CQIs simultaneously and benefit from longer DTX periods. This is illustrated in Figure 3.
  • each HS-SCCH in the monitored set of a UE should be able to relate to an HS-DSCH in the other cell, either semi-statically by RRC configuration of the HS-SCCH, or dymamically by means of one bit in the HS-SCCH part 1 to indicate which cell it relates to.
  • HS-DPCCH for HS-DPCCH:
  • the ACK/NACK field for one cell should be able to be delayed by one slot to avoid simultaneous ACK/NACK transmission for the two cells.
  • CQI is coded using a 10,4 code and transmitted for each cell alternately. o
  • This configuration could be UE-specific, for example for cell-edge UEs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un moyen permettant de configurer un canal de signalisation de commande en fonction de la transmission d'un paquet de données qui est transmis soit sur la même fréquence porteuse que celle sur laquelle est transmis le canal de signalisation de commande, soit sur une fréquence porteuse différente. Il est ainsi possible d'optimiser l'attribution de ressources de transmission sur chaque fréquence porteuse entre des canaux de signalisation de commande et des canaux de transmission de données.
PCT/IB2009/052649 2008-06-26 2009-06-19 Procédé d'attribution de ressources de transmission dans un système de télécommunication WO2009156930A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08305332.2 2008-06-26
EP08305332 2008-06-26

Publications (1)

Publication Number Publication Date
WO2009156930A1 true WO2009156930A1 (fr) 2009-12-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/052649 WO2009156930A1 (fr) 2008-06-26 2009-06-19 Procédé d'attribution de ressources de transmission dans un système de télécommunication

Country Status (1)

Country Link
WO (1) WO2009156930A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011120237A1 (fr) * 2010-04-02 2011-10-06 上海贝尔股份有限公司 Procédé et dispositif permettant de synchroniser un ordre de transmission d'informations d'indication d'allocation de ressources dans des réseaux sans fil

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
HUAWEI: "Analysis of HS-DPCCH design for DC-HSDPA", 3GPP DRAFT; R1-083075, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, no. Jeju; 20080813, 13 August 2008 (2008-08-13), XP050316518 *
QUALCOMM EUROPE: "Cubic Metric Study of HS-DPCCH for DC-HSDPA", 3GPP DRAFT; R4-081015, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG4, no. Kansas City, USA; 20080430, 30 April 2008 (2008-04-30), XP050179628 *
QUALCOMM EUROPE: "Dual Carrier HSDPA assumptions and standards impact", 3GPP DRAFT; R1-082048, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Kansas City, USA; 20080514, 14 May 2008 (2008-05-14), XP050110386 *
QUALCOMM EUROPE: "Further description of WCDMA based E-UTRA", 3GPP DRAFT; R1-051109, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. San Diego, USA; 20051004, 4 October 2005 (2005-10-04), XP050100724 *
SAMSUNG: "Control channel structure for dual-cell HSDPA", 3GPP DRAFT; R1-081751_CH_DUALCELL, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Kansas City, USA; 20080514, 14 May 2008 (2008-05-14), XP050110141 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011120237A1 (fr) * 2010-04-02 2011-10-06 上海贝尔股份有限公司 Procédé et dispositif permettant de synchroniser un ordre de transmission d'informations d'indication d'allocation de ressources dans des réseaux sans fil
CN102835164A (zh) * 2010-04-02 2012-12-19 上海贝尔股份有限公司 无线网络中用于同步资源分配指示信息次序的方法和装置

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