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WO2010051769A1 - Procédé d'allocation de ressources, système et équipement utilisateur permettant une signalisation de rétroaction en liaison montante dans un système lte-a - Google Patents

Procédé d'allocation de ressources, système et équipement utilisateur permettant une signalisation de rétroaction en liaison montante dans un système lte-a Download PDF

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Publication number
WO2010051769A1
WO2010051769A1 PCT/CN2009/074841 CN2009074841W WO2010051769A1 WO 2010051769 A1 WO2010051769 A1 WO 2010051769A1 CN 2009074841 W CN2009074841 W CN 2009074841W WO 2010051769 A1 WO2010051769 A1 WO 2010051769A1
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WO
WIPO (PCT)
Prior art keywords
uplink feedback
signaling
feedback signaling
resource
sequence number
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Ceased
Application number
PCT/CN2009/074841
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English (en)
Chinese (zh)
Inventor
林亚男
潘学明
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Filing date
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Application filed by Datang Mobile Communications Equipment Co Ltd filed Critical Datang Mobile Communications Equipment Co Ltd
Publication of WO2010051769A1 publication Critical patent/WO2010051769A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the present invention relates to the field of wireless communications, and more particularly to a method, system and terminal device for allocating resources for an uplink feedback signal in an LTE-A system. Background of the invention
  • LTE Long Term Evolution
  • OFDM Orthogonal Frequency Division Multiplexing
  • MIMO Multiple Input Multiple Output
  • LTE has the following technical features: increased communication rate; improved spectrum efficiency; packet-oriented service as the main target, system based on packet switching on the overall architecture; through system design and strict QoS mechanism, Guarantee the quality of service for real-time services; Flexible system deployment; Reduced wireless network delay; Increased cell boundary bit rate; Emphasizes backward compatibility, supports collaborative operation of existing 3G systems and non-3GPP specification systems. Therefore, LTE has a technical advantage over 3G.
  • the LTE-A system is an improvement to the LTE system, using spectrum aggregation technology.
  • the LTE-A system supports a wider system bandwidth than the LTE system, and supports the case where the number of uplink and downlink carriers is different, and the downlink bandwidth is greater than or equal to the uplink bandwidth or the number of downlink frequency bands is greater than the number of uplink frequency bands.
  • the system bandwidth is 100 MHz, which may be a spectrum that directly allocates 100 MHz bandwidth. As shown in Figure 1, the lower half of the 100 MHz bandwidth comes from the upper half.
  • Part of a continuous spectrum (where f represents frequency); another case may be to use the spectrum aggregation technique adopted by the LTE-A system to aggregate multiple discontinuous spectrums allocated to existing systems.
  • the large bandwidth is used by the LTE-A system.
  • the upper half of the figure is a plurality of dispersed spectrums, and the lower half is the bandwidth obtained after aggregation.
  • the physical layer there is no need to distinguish between the two cases.
  • the basic transmission schemes namely, the frequency band allocation diagrams of the frequency division duplex (FDD) system and the time division duplex (TDD) system are shown in Figs. 3 and 4, respectively.
  • FDD frequency division duplex
  • TDD time division duplex
  • the uplink channel and the downlink channel occupy different frequency bands, and there is only one working carrier in the uplink and downlink transmission, and each subframe contains a control signaling region and a data region.
  • the uplink channel and the downlink channel occupy different periods of the same frequency band.
  • there is only one working carrier in the uplink and downlink transmission and each subframe contains a control signal. Let the area and a data area.
  • the UE when the base station performs downlink control signaling, the UE allocates dedicated resources for each UE. However, for the transmission of the uplink feedback signaling, the UE does not know the resources used by other users, and the base station cannot be limited by scheduling. The problem of feedback timing of each UE. Therefore, in order to avoid resource conflicts when the UE sends uplink feedback signaling, it is necessary to specifically allocate resources for uplink feedback signaling.
  • each uplink feedback signaling is feedback signaling corresponding to the downlink data
  • the downlink control signaling and the downlink data are in one-to-one correspondence
  • the downlink control signaling also have a one-to-one correspondence
  • the downlink control signaling may be used for resource allocation of the uplink feedback signaling.
  • the main purpose of the present invention is to provide a resource allocation method for uplink feedback signaling in an LTE-A system, so that the LTE-A system can indirectly schedule uplink feedback signaling transmission when performing uplink feedback signaling transmission.
  • Another object of the present invention is to provide a resource allocation system and a terminal device for uplink feedback signaling in an LTE-A system, so that the LTE-A system can schedule an uplink feedback signaling transmission when performing uplink feedback signaling transmission. Band resources used.
  • a resource allocation method for uplink feedback signaling in an LTE-A system includes:
  • the terminal device acquires the number information of the downlink carrier that is currently occupied by the UE;
  • the UE receives downlink control signaling, and obtains a starting location of resources used by the downlink control signaling of the UE;
  • step C Calculate the sequence number of the resource used by the uplink feedback signaling of the UE according to the information obtained in step A and step B.
  • the UE in step A obtains the number information of the downlink carrier that is currently occupied by the UE through the broadcast signaling.
  • ⁇ indicates the sequence number of the resource used for uplink feedback signaling
  • ⁇ indicates the downlink control.
  • the starting position of the resource used for signaling, and L indicates the number information of the downlink carrier currently occupied by the UE .
  • the step of calculating the sequence number of the resource used by the uplink feedback signaling of the UE includes: determining, according to the starting position of the resource used by the downlink control signaling, and the number information of the downlink carrier currently occupied by the UE, determining an uplink feedback. The sequence number of the resource used for signaling.
  • the method for calculating the sequence number of the resource used by the uplink feedback signaling of the UE includes: a method for calculating a sequence number of the resource used for the uplink feedback signaling in the LTE system, and a number information of the downlink carrier currently occupied by the UE, and calculating The sequence number of the resource used by the UE for uplink feedback signaling in the LTE-A system.
  • the sequence number of the resource used for calculating the uplink feedback signaling of the UE is as follows: number;
  • ( ⁇ ) indicates the number of resources used by the uplink feedback signaling corresponding to the first downlink carrier.
  • the sequence number of the resource used for calculating the uplink feedback signaling of the UE is as follows:
  • t(l) represents the resource used for the uplink feedback signaling corresponding to the Lth downlink carrier
  • the quantity is the number of resources used by all uplink feedback signaling corresponding to the first L-1 downlink carriers.
  • the sequence number of the resource used by the uplink feedback signaling has a continuous positive integer value space.
  • the step C further includes: transmitting the uplink feedback signaling on the resource corresponding to the sequence number.
  • the uplink feedback signaling is: a channel quality indicator CQI, a precoding matrix indication PMI, a channel rank indication RI, or an ACK/NACK feedback signaling for hybrid automatic retransmission HARQ.
  • a resource allocation system for uplink feedback signaling in an LTE-A system comprising: a base station and a terminal device UE;
  • a base station configured to send downlink control signaling and number information of a downlink carrier occupied by each UE
  • the UE is configured to calculate, according to the starting position of the resource used by the received downlink control signaling, and the number information of the downlink carrier that is currently occupied by the UE, the sequence number of the resource used by the uplink feedback signaling, and the uplink feedback signaling
  • the bearer is sent on the resource corresponding to the sequence number.
  • the UE includes:
  • a receiving module configured to receive downlink control signaling, obtain a starting position of a resource used by the downlink control signaling of the UE, and receive number information of a downlink carrier occupied by the UE; and a calculating module, configured to perform downlink according to the UE Controlling the starting position of the resource used by the signaling and the number information of the downlink carrier occupied by the UE, and calculating the sequence number of the resource used for the uplink feedback signaling;
  • the sending module is configured to send the uplink feedback signaling to be sent on the resource corresponding to the calculated sequence number.
  • a terminal device UE for uplink feedback signaling resource allocation in an LTE-A system the UE includes:
  • a receiving module configured to receive downlink control signaling, obtain a starting position of a resource used by the downlink control signaling of the UE, and receive number information of a downlink carrier occupied by the UE; and a calculating module, configured to perform downlink according to the UE Controlling the starting position of the resource used by the signaling and the number information of the downlink carrier occupied by the UE, and calculating the sequence number of the resource used for the uplink feedback signaling;
  • a sending module configured to send the uplink feedback signaling to be sent on the resource corresponding to the calculated sequence number.
  • the solution of the present invention is that, in the LTE-A system, the terminal device obtains the number information of the downlink carrier that is currently occupied by the terminal device, and receives the downlink control signaling to obtain the downlink control signaling device that belongs to itself. Using the starting position of the resource, the number of the resource used for the uplink feedback signaling is calculated, thereby effectively realizing the allocation of the frequency band resource for the uplink signaling in the LTE-A system, and avoiding the terminal device transmitting the uplink. A resource conflict occurs during feedback signaling. BRIEF DESCRIPTION OF THE DRAWINGS
  • Figure 1 is a schematic diagram of an LTE-A single spectrum system
  • FIG. 2 is a schematic diagram of an LTE-A spectrum aggregation system
  • Figure 3 is a schematic diagram of bandwidth allocation of FDD system in LTE-A
  • FIG. 4 is a schematic diagram of resource allocation of a TDD system band in LTE-A;
  • FIG. 5 is a flow chart of a method for calculating a sequence number of resources used by an uplink feedback signal in LTE-A;
  • FIG. 6 is a schematic structural diagram of a UE in LTE-A
  • FIG. 7 is a diagram showing downlink control signaling of each carrier independently carrying the UE on the carrier in LTE-A Intention
  • Figure 8 (a) and (b) are schematic diagrams of downlink control signaling of all UEs on only one carrier in LTE-A;
  • FIG. 9 is a schematic diagram of downlink control signaling that all carriers in LTE-A jointly carry all UEs. Mode for carrying out the invention
  • each UE In the LTE-A system, there is the same situation as the LTE system, that is, when the base station performs downlink control signaling transmission, each UE is allocated a dedicated physical resource, but for uplink feedback signaling, each UE cannot learn other UEs. For resource usage, in order to avoid resource conflicts when each UE performs feedback, each UE may be configured to calculate a resource number used for uplink feedback signaling transmission according to the resource start position of the downlink control signaling received by each UE. In the LTE-A system, there are multiple downlink carrier configurations. For a UE that uses a single carrier for uplink transmission or only supports a small number of uplink carriers, there are cases where the number of uplink and downlink carriers is inconsistent.
  • the uplink feedback signaling on the uplink will be multiplexed and transmitted in one uplink carrier.
  • a user who transmits a quantity will simultaneously occupy multiple carriers for downlink transmission, and one user may need to feed back information on multiple downlink carriers in one uplink carrier at the same time. In this way, to calculate the resource number used for the uplink feedback signaling, only the start address L of the downlink control signaling is insufficient, and the carrier number of the carrier where the downlink data corresponding to the uplink feedback signaling is located is also known.
  • the resource number L of the uplink feedback signaling can be determined by acquiring two independent variables of the starting position of the resource used for the downlink control signaling and the carrier number of the carrier where the downlink data is located.
  • each downlink carrier has independent downlink control signaling, that is, the downlink control signaling of the UE and the downlink data are transmitted on the same carrier, and each downlink carrier can be regarded as an independent LTE version. 8 system, as shown in Figure 7; the other is that there is downlink control signaling on only one downlink carrier in the system, that is, the UEs on each carrier are controlled by downlink control signaling on one downlink carrier, wherein the downlink control signal
  • the order may be independent of each other as shown in FIG. 8( a ), or may be a hybrid distribution as shown in FIG.
  • the last one is downlink control signaling that all downlink carriers jointly carry all UEs in the system, That is, the downlink control signaling and downlink data of the UE may not be transmitted on one carrier, as shown in FIG. 9.
  • there are two resource allocation methods for uplink feedback signaling see Embodiment 1 and Embodiment 2).
  • the method of the present invention is specifically as follows, as shown in FIG. 5:
  • Step 501 The UE acquires a downlink carrier number that is currently occupied by the UE.
  • the downlink carrier number currently occupied by the UE itself can be obtained from the base station through a broadcast signal.
  • the base station calculates the downlink carrier number currently occupied by each UE according to the current system status, and sends the downlink carrier number to the UE through broadcast signaling.
  • Step 502 The UE receives the downlink control signaling, and obtains a starting location of the resource used by the downlink control signaling that belongs to itself.
  • Step 503 Calculate, according to the downlink carrier number obtained in step 501 and the resource start location obtained in step 502, a resource number used by the UE for uplink feedback signaling.
  • the structure of the UE provided by the present invention is as shown in FIG. 6, and includes: a receiving module, a calculating module, and a sending module. among them:
  • a receiving module configured to receive downlink control signaling, obtain a starting location of a resource used by the downlink control signaling corresponding to the UE, and receive number information of a downlink carrier occupied by the UE;
  • a calculation module configured to calculate, according to the starting location of the used resource of the received downlink control signaling, and the number information of the downlink carrier occupied by the UE, the resource number used by the uplink feedback signaling of the UE;
  • the sending module is configured to send the uplink feedback signaling to the corresponding resource according to the calculated resource number used by the uplink signaling.
  • the present invention further provides a system for performing uplink feedback signaling resource allocation in an LTE-A system, including a base station and a UE, where
  • a base station a start position of a resource used for transmitting downlink control signaling, and a number information of a downlink carrier occupied by each UE;
  • the UE is configured to calculate the resource number used by the uplink feedback signaling according to the starting position of the resource used by the received downlink control signaling and the number information of the downlink carrier that is currently occupied by the UE, and carry the uplink feedback signaling in the The calculated resource corresponding to the resource number used for the uplink feedback signaling is sent.
  • the LTE-A system there are multiple uplink feedback signalings having different roles, such as channel quality indication (CQI), precoding matrix indication (PMI), channel rank indication (RI), and for hybrid automatic Retransmission (HARQ ) ACK/NACK signaling, etc.
  • CQI channel quality indication
  • PMI precoding matrix indication
  • RI channel rank indication
  • HARQ hybrid automatic Retransmission
  • ACK/NACK is taken as an example to describe the resource allocation method of the uplink feedback signaling in the LTE-A system.
  • the UE when the HARQ function is enabled in the downlink transmission, after completing the downlink data reception, the UE needs to feed back to the base station whether the signaling needs to be retransmitted, that is, ACK/NACK, where ACK indicates that no retransmission is required, and NACK indicates that retransmission is required.
  • control signaling on one downlink carrier may be used to control data on multiple downlink carriers, and the UE performs uplink.
  • the resource used by the ACK/NACK feedback (the resource number is ⁇ ) is related not only to the start position of the resource used for the downlink control signaling, but also to the carrier number L of the downlink carrier occupied by the UE, so as to ensure the ACK.
  • the uniqueness of the sequence number of the resources used by the /NACK feedback signaling thereby ensuring that no collision occurs when multiple UEs send ACK/NACK.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • each downlink carrier When there is independent downlink control signaling on each downlink carrier, that is, when downlink control signaling and downlink data of the UE are transmitted on the same carrier, each downlink carrier can be regarded as an independent LTE version 8 system.
  • the following scheme can be used to allocate resources for uplink ACK/NACK.
  • the sequence number of the resource used for ACK/NACK feedback signaling can be calculated as follows:
  • nUL f ( n DL ) + N ' ( 1 )
  • the high-level configuration parameter indicates the starting position of the resource area used for the feedback information.
  • ( ⁇ ) is the ACK/NACK feedback signal corresponding to the Zth downlink carrier.
  • the UE learns through broadcast signaling, it is on each downlink carrier.
  • SL refers to the starting position of the resource region used by the ACK/NACK feedback signaling on the Lth carrier.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the UEs on each carrier are controlled by control signaling on one carrier, or when each carrier in the system jointly carries downlink control signaling of all UEs, That is, the downlink control signaling and downlink data of the UE may not be transmitted on one carrier.
  • the same scheme may be used to allocate resources for each uplink ACK/NACK feedback signaling.
  • this scheme is also an improvement of the uplink ACK/NACK resource allocation scheme in the LTE system.
  • ( /( "D L ) MOD ) represents the remainder of / L)
  • t (D is the number of resources used for the ACK/NACK feedback signaling corresponding to the Lth downlink carrier, ⁇ t(l)
  • the UE learns through broadcast signaling, it corresponds to each downlink carrier.
  • the foregoing two embodiments are allocation schemes for resources used in uplink ACK/NACK feedback designed according to different manners of different downlink control signalings on the carrier in the LTE-A system, and the foregoing resource allocation scheme may also be
  • the mapping function performs resource allocation, but the following conditions must be met: (1) no other independent variables are introduced; (2) one-to-one correspondence is satisfied, that is: "UL is different using different ⁇ and L mappings; (3) The value space of ⁇ is a continuous positive integer.
  • uplink feedback signalings there are more than four uplink feedback signalings. Similar to the uplink ACK/NACK, these uplink signalings can be regarded as uplink feedback signaling of a certain downlink control signaling. Therefore, when performing resource allocation of other uplink feedback signaling, the same uplink can be used.
  • the same resource allocation scheme as ACK/NACK is only calculated according to the corresponding downlink control signaling.
  • the solution of the present invention is that, in the LTE-A system, the downlink control signaling is received by the UE, and the starting position of the physical resource used by the downlink control signaling and the downlink carrier occupied by the UE are acquired. The number information is used to calculate the resource number used for the uplink feedback signaling, and resource allocation is performed accordingly.
  • the solution can allocate resources to the uplink feedback signaling in the LTE-A system reasonably and effectively, and avoids resource conflicts when the UE sends uplink feedback signaling.

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

Abstract

La présente invention concerne un procédé d'allocation de ressources, un procédé et un équipement utilisateur (UE) permettant la signalisation de rétroaction en liaison montante dans un système LTE-A. L'UE obtient les informations de numérotation de la porteuse de liaison descendante qu’il occupe actuellement, reçoit la signalisation de commande de liaison descendante, obtient l'emplacement de départ de la ressource utilisée par la signalisation de commande de liaison descendante qui lui appartient, et calcule le numéro de série de la ressource utilisée par la signalisation de rétroaction en liaison montante de telle sorte que l'allocation de ressources correctes pour la signalisation de rétroaction en liaison montante puisse être mise en œuvre de manière efficace dans le système LTE-A et que la collision de ressource puisse être évitée lorsque l'UE transmet la signalisation de rétroaction en liaison montante.
PCT/CN2009/074841 2008-11-06 2009-11-06 Procédé d'allocation de ressources, système et équipement utilisateur permettant une signalisation de rétroaction en liaison montante dans un système lte-a Ceased WO2010051769A1 (fr)

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CN200810225592.1 2008-11-06
CN200810225592A CN101742657A (zh) 2008-11-06 2008-11-06 一种lte-a系统中上行反馈信令资源分配方法、系统及装置

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US11595991B2 (en) * 2015-09-25 2023-02-28 Sony Corporation Method for indicating the allocated resources for a HARQ message in a random access procedure for a low-complexity, narrowband terminal

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CN106612557B (zh) * 2015-10-26 2020-02-18 中国移动通信集团公司 下行ack/nack信息的传输方法、基站及用户设备
JP6618633B2 (ja) * 2016-04-07 2019-12-11 テレフオンアクチーボラゲット エルエム エリクソン（パブル） 無線ネットワークノード、無線デバイス、および、それらにおいて実行される方法

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WO2008021573A2 (fr) * 2006-08-18 2008-02-21 Interdigital Technology Corporation Envoi et réduction d'une signalisation de rétroaction en liaison montante dans la transmission de données de services multidestination et de diffusion multimédia
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