WO2013007144A1 - Procédé, dispositif et système de transmission et de réception de données - Google Patents

Procédé, dispositif et système de transmission et de réception de données Download PDF

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Publication number
WO2013007144A1
WO2013007144A1 PCT/CN2012/077312 CN2012077312W WO2013007144A1 WO 2013007144 A1 WO2013007144 A1 WO 2013007144A1 CN 2012077312 W CN2012077312 W CN 2012077312W WO 2013007144 A1 WO2013007144 A1 WO 2013007144A1
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WO
WIPO (PCT)
Prior art keywords
resource
data
sub
resource block
pdcch
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Application number
PCT/CN2012/077312
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English (en)
Chinese (zh)
Inventor
张然然
苏昕
荆梅芳
林亚男
肖国军
Original Assignee
电信科学技术研究院
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Publication of WO2013007144A1 publication Critical patent/WO2013007144A1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path

Definitions

  • the present invention relates to communication technologies, and in particular, to a data transmission and reception method, apparatus, and system. Background technique
  • a physical downlink control channel (PDCCH) is transmitted in each radio subframe and formed with a physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • TDM time division multiplexing
  • the multiplexing relationship of time division multiplexing (TDM), as shown in FIG. 1, is used to transmit a PDCCH, and a data area is used to transmit a PDSCH.
  • OFDM orthogonal frequency division multiplexing
  • the control region for transmitting the PDCCH in the LTE system is composed of a logically divided control channel element (CCE), wherein the mapping of CCE to RE (resource element) uses a completely interleaved manner.
  • the downlink control information (DCI) transmission is also based on the CCE.
  • a DCI for a user equipment (UE) can be transmitted in N consecutive CCEs. In the LTE system, the N is possible. The value is 1, 2, 4 or 8, and is called the CCE aggregation level.
  • the UE performs a PDCCH blind check in the control area to search whether there is a PDCCH for the PDCCH.
  • the blind detection is specifically: using the radio network temporary identifier (RNTI) of the UE for different DCI formats and CCEs.
  • the aggregation level is subjected to a decoding attempt, and if the decoding is correct, it is determined to be the DCI for the UE, and is received.
  • RNTI radio network temporary identifier
  • each downlink subframe of the UE in the discontinuous reception (DRX) state needs to perform blind detection on its control region to search for the PDCCH.
  • Multi-user multiple input multiple output MU-MIMO
  • CoMP cooperative multiple points
  • ID wireless identification of the same cell identifier
  • LTE-A long term evolution-advanced
  • the capacity and transmission efficiency of the physical downlink shared channel are greatly improved in the introduction of the configuration of the remote radio head (RRH) and the eight antennas.
  • RRH remote radio head
  • RRH remote radio head
  • the LTE-A system The performance of the physical downlink control channel has not improved.
  • the application of the above new technology enables the PDSCH to simultaneously provide data transmission for more users, which will greatly increase the demand for the PDCCH channel capacity;
  • the user-specific reference applied in the PDSCH New technologies such as user-specific reference signal (UTS) and relay-PDCCH (R-PDCCH) applied in relay backhaul provide the following techniques and experience for PDCCH enhancement.
  • UTS user-specific reference signal
  • R-PDCCH relay-PDCCH
  • one solution is to: transmit the enhanced PDCCH in the PDSCH domain in the downlink subframe while retaining the original PDCCH domain.
  • the original PDCCH region still uses the existing transmission and reception technologies, and uses the original PDCCH resources to occupy the first N OFDM symbols.
  • the possible values of N are 1, 2, 3, and 4.
  • This part of the PDCCH domain is called the legacy PDCCH (Least PDCCH) domain, such as transmitting diversity when transmitting, and based on the cell-level reference signal when receiving (cell) -specific reference signal, CRS ) blind detection of DCI in public search space and user-specific search space using blind detection techniques.
  • the enhanced PDCCH domain can use more advanced transmission and reception technologies, such as precoding when transmitting, detecting based on UERS during reception, and transmitting time-frequency resources outside the legacy PDCCH domain, using some resources of the original PDSCH, and
  • the PDSCH implements multiplexing by means of frequency division.
  • This part of the PDCCH domain is called an enhanced PDCCH (E-PDCCH) domain.
  • the scheme in which the Enhanced PDCCH and the PDSCH are multiplexed by the frequency division method is called frequency division multiplexing (FDM) E-PDCCH.
  • each piece of data in the Enhanced PDCCH region occupies at least one resource of a physical resource block pair (PRB pair).
  • PRB pair physical resource block pair
  • DCI format 1C DCI format 1C
  • 2/2C a larger DCI format such as 2/2C does not exceed 60.
  • the number of resources in each PRB pair is large, as shown in Table 1. Therefore, when DCI transmission is performed according to the existing FDM E-PDCCH scheme, the frequency efficiency is too low, resulting in waste of resources.
  • Embodiments of the present invention provide a data transmission and reception method, apparatus, and system to improve data transmission efficiency.
  • a data transmission method includes:
  • a data receiving method includes:
  • a data transmission device includes:
  • a resource allocation unit configured to divide each resource block pair into at least two sub-resource block pairs according to a frequency domain; and use a sub-resource block pair as a minimum resource allocation unit to allocate data in an E-PDCCH region of the enhanced physical downlink control channel Resource; a transport unit that is used to transfer data on allocated resources.
  • a data receiving device includes:
  • a determining unit configured to determine a resource location of the data corresponding to the device, where the resource includes at least one sub-resource block pair, where the sub-resource block pair is specifically: each resource block pair is divided into M parts according to a frequency domain After that, each share is a sub-resource block pair, and the M ⁇ 2;
  • a receiving unit configured to receive the data on the resource.
  • a data transmission system comprising:
  • a transmitting end configured to divide each resource block pair into at least two sub-resource block pairs according to a frequency domain; use a sub-resource block pair as a minimum resource allocation unit, and allocate resources for each data in the enhanced physical downlink control channel E-PDCCH region ; transfer data on the allocated resources;
  • the receiving end is configured to determine a resource location of the corresponding data, and receive the data on the resource.
  • An embodiment of the present invention provides a data transmission and reception method, apparatus, and system, which are configured to divide a resource block pair into at least two sub-resource block pairs, and perform resource allocation of the E-PDCCH domain in units of sub-resource block pairs, according to the data. And the size of the sub-resource block pair, each data is transmitted by one or more sub-resource block pairs, thereby improving the data transmission efficiency.
  • FIG. 1 is a schematic diagram of multiplexing relationship between a control area and a data area in a downlink subframe in the prior art
  • FIG. 2 is a schematic structural diagram of an enhanced PDCCH in the prior art
  • FIG. 3 is a flowchart of a data transmission method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of partitioning of sub-resource block pairs according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a data receiving method according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a data receiving apparatus according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention. detailed description
  • An embodiment of the present invention provides a data transmission and reception method, apparatus, and system, which are configured to divide a resource block pair into at least two sub-resource block pairs, and perform resource allocation of the E-PDCCH domain in units of sub-resource block pairs, according to the data. And the size of the sub-resource block pair, each data is transmitted by one or more sub-resource block pairs, thereby improving the data transmission efficiency.
  • An embodiment of the present invention provides a data transmission method. As shown in FIG. 3, the method includes:
  • Step S301 Divide each resource block pair into at least two sub-resource block pairs according to a frequency domain
  • Step S302 The sub-resource block pair is a minimum resource allocation unit, and allocate resources for each data in the E-PDCCH domain of the enhanced physical downlink control channel;
  • the sub-resource block pair is the minimum resource allocation unit, and allocates resources for each data in the E-PDCCH domain, where the sub-resource block pair is specifically: after each resource block pair is divided into M shares, each resource block pair is a sub-resource block pair, M>2;
  • Step S303 Transmitting data on the allocated resources.
  • each PRB pair is divided into multiple sub-resource pairs (subRB pairs) according to the frequency domain.
  • the subRB pair can be used as the smallest resource allocation unit, so that the transmission is short.
  • the entire PRB pair is not required to implement the data transmission, and only one subRB pair is needed to implement the data transmission, and for longer data, multiple subRB pairs can also be used for transmission, due to the minimum resources.
  • the allocation unit is smaller, so the resources occupied by the data are still reduced, and the data transmission efficiency is improved.
  • the slash portion is Legacy PDCCH RE (original PDCCH resource unit)
  • the grid portion is UERS RE (user-specific reference) Signal resource unit).
  • DCI when the data is DCI, since the number of bits included in the DCI is small, when the subRB pair is used as the smallest resource allocation unit, DCI can be transmitted through fewer resources, thereby improving the transmission efficiency of the DCI.
  • the data is described as DCI, and the application can be replaced by other types of data for application by a person skilled in the art.
  • the other subRB pair can also be allocated to the DCI of other users, or allocated to the PDSCH.
  • the receiving end needs to perform blind detection with the subRB pair as the minimum resource unit, thereby obtaining the corresponding DCI.
  • the sender may also allocate the resource to each data in the E-PDCCH domain by using the sub-resource block pair as the minimum resource allocation unit, and then notify the receiving end of the location information of the corresponding E-PDCCH resource, so that the receiving end is Root According to the received location information, the resource location of the data corresponding to the received location information is not blindly detected or the number of blind detections is reduced, thereby reducing the complexity of the processing at the receiving end.
  • the transmitting end allocates the resource
  • the sending sub-RB pair identifier of the data corresponding to each receiving end is directly sent to each receiving end, and each receiving end directly determines the resource corresponding to the data according to the subRB pair identifier.
  • Location no blind inspection is required.
  • the transmitting end allocates the resource
  • the PRB pair identifier of the data corresponding to each receiving end is sent to each receiving end, and each receiving end directly determines the PRB pair of the corresponding data according to the PRB pair identifier.
  • a blind check can be performed within the PRB pair range.
  • each resource block pair can be equally divided into M shares according to the frequency domain.
  • channel measurement can be performed by CSI-RS (channel state information reference signal) or CRS, and demodulation based on UERS or CRS, if necessary, solution based on UERS Tones, each subRB pair includes UERS RE, which facilitates the receiver to demodulate according to UERS.
  • CSI-RS channel state information reference signal
  • CRS channel state information reference signal
  • each PRB pair includes 12 UERS REs, every 4 UERS
  • each subRB pair includes 4 UERS REs
  • the subRB pair may be precoded in a minimum unit, that is, the minimum unit of precoding granularity is subRB pair. For example, if only one subRB pair is allocated for the transmitted DCI, the pre-coded granularity of the transmitted data and UERS in the E-PDCCH is one subRB pair; if more than one subRB pair is allocated for the transmitted DCI, the E-PDCCH The pre-coded granularity of the transmitted data and the UERS may be one subRB pair or multiple subRB pairs, but no more than the number of allocated subRB pairs.
  • the precoding granularity of the data signal in the E-PDCCH domain may be different from the precoding granularity of the UERS, for example,
  • the minimum unit of precoding granularity of the data signal in the E-PDCCH domain is a sub-resource block pair
  • the minimum unit of the pre-coded granularity of the UERS RE is a resource block pair
  • the UERS between different users in the same resource block pair is multi-user Input multi-output MU-MIMO mode for differentiation.
  • the precoding of the DCI transmission in the PRB pair is performed.
  • the granularity is 1 subRB pair
  • the precoding granularity of the UERS in the PRB pair is 1 PRB pair. If the UERS of each user overlaps on the time-frequency resources, the MU-MIMO method is used for distinguishing.
  • the embodiment of the invention further provides a data receiving method. As shown in FIG. 5, the method includes:
  • Step S501 Determine a resource location of the data corresponding to the data receiving end, where the resource includes at least one sub-resource block pair, where the sub-resource block pair is specifically: after each resource block pair is divided into M parts according to the frequency domain , each resource block pair is a sub-resource block pair, M ⁇ 2;
  • Step S502 Receive data on the determined resource.
  • step S501 different resource arrangements are used to determine the resource location of the corresponding data, including the following three types:
  • the embodiment of the present invention further provides a data transmission device, which may be specifically used as a transmitting end for transmitting data.
  • the device includes:
  • the resource allocation unit 601 is configured to divide each resource block pair into at least two sub-resource block pairs according to a frequency domain; the sub-resource block pair is a minimum resource allocation unit, and is an enhanced physical downlink control channel in the E-PDCCH domain. resource allocation;
  • the transmitting unit 602 is configured to transmit data on the allocated resources.
  • the data transmission device further includes:
  • the notification unit notifies the receiving end of the location information of the corresponding E-PDCCH resource.
  • the embodiment of the present invention further provides a data receiving device, which may be specifically a receiving end for receiving data. As shown in FIG. 7, the device includes:
  • the determining unit 701 is configured to determine a resource location of the data corresponding to the device, where the resource includes at least one sub-resource block pair, where the sub-resource block pair is specifically: each resource block pair is divided into M according to a frequency domain. After the share, each resource block pair is a sub-resource block pair, M ⁇ 2;
  • the receiving unit 702 is configured to receive data on the determined resource.
  • the determining unit 701 is specifically configured to: according to a preset sub-resource block-to-position determining manner of the corresponding data: Receiving location information of the corresponding E-PDCCH resource sent by the sending end, and determining a location of the sub-resource block pair of the corresponding data according to the location information; or
  • the embodiment of the invention further provides a data transmission system. As shown in FIG. 8, the system includes:
  • the transmitting end 801 is configured to divide each resource block pair into at least two sub-resource block pairs according to a frequency domain, and use a sub-resource block pair as a minimum resource allocation unit to allocate data in the E-PDCCH domain of the enhanced physical downlink control channel. Resource; transfer data on the allocated resources;
  • the receiving end 802 is configured to determine a resource location of the corresponding data, and receive data on the determined resource.
  • An embodiment of the present invention provides a data transmission and reception method, apparatus, and system, which are configured to divide a resource block pair into at least two sub-resource block pairs, and perform resource allocation of the E-PDCCH domain in units of sub-resource block pairs, according to the data. And the size of the sub-resource block pair, each data is transmitted by one or more sub-resource block pairs, thereby improving the data transmission efficiency.

Abstract

L'invention porte sur un procédé, un dispositif et un système de transmission et de réception de données, concernant la technologie des communications. Par division d'une paire de blocs de ressource en au moins deux paires de sous-blocs de ressource, et attribution de ressources à un domaine E-PDCCH en prenant comme unité une paire de sous-blocs de ressource, chaque élément de données est transmis par une ou plusieurs paires de sous-blocs de ressource en fonction de la taille des données et des paires de sous-blocs de ressource, ce qui améliore l'efficacité de transmission de données.
PCT/CN2012/077312 2011-07-08 2012-06-21 Procédé, dispositif et système de transmission et de réception de données WO2013007144A1 (fr)

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CN2011101911997A CN102256358B (zh) 2011-07-08 2011-07-08 一种数据传输和接收方法、装置及系统

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