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WO2013064043A1 - Procédé pour la mise en œuvre d'un pdcch amélioré et dispositif associé - Google Patents

Procédé pour la mise en œuvre d'un pdcch amélioré et dispositif associé Download PDF

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Publication number
WO2013064043A1
WO2013064043A1 PCT/CN2012/083654 CN2012083654W WO2013064043A1 WO 2013064043 A1 WO2013064043 A1 WO 2013064043A1 CN 2012083654 W CN2012083654 W CN 2012083654W WO 2013064043 A1 WO2013064043 A1 WO 2013064043A1
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WIPO (PCT)
Prior art keywords
pdcch
frequency resource
available
ofdm symbol
information
Prior art date
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Ceased
Application number
PCT/CN2012/083654
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English (en)
Chinese (zh)
Inventor
史志华
沈晓冬
刘建军
潘成康
王启星
刘光毅
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.)
China Mobile Communications Group Co Ltd
Original Assignee
China Mobile Communications Corp
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 China Mobile Communications Corp filed Critical China Mobile Communications Corp
Publication of WO2013064043A1 publication Critical patent/WO2013064043A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to an enhanced PDCCH implementation method and related device.
  • LTE Long Time Evolution
  • TTI Transmission Time Internal
  • OFDM Orthogonal Frequency Division Multiplexing
  • the PDCCH may occupy 1-3 OFMD symbols;
  • the system (the downlink system is less than or equal to 10 PRBs) occupies 2-4 OFDM symbols, because the number of subcarriers per OFDM symbol is small, so more symbols are needed to carry the control information in the PDCCH, and pass
  • the Physical Control Format Indicator Channel indicates how many OFDM symbols the PDCCH is occupied by the User Equipment (UE). By detecting the PCFICH channel information, the UE can know that the PDCCH occupies several OFDM symbols in the current time transmission, and the data transmission starts from the OFDM symbol.
  • a PDCCH and a data channel OFDM symbol occupation diagram is shown, wherein the abscissa represents an OFDM symbol value, and the ordinate represents a frequency domain resource.
  • the PDCCH occupies 3 OFDM symbols.
  • MIMO Multiple-Input Multiple-Out-put
  • MU-MIMO multi-user multiple input multiple output
  • MU-MIMO multi-user multiple input multiple output
  • the embodiments of the present invention provide an enhanced PDCCH implementation method and related equipment, which are used to increase the capacity of a PDCCH system of a legacy LTE system.
  • An embodiment of the present invention provides an enhanced PDCCH implementation method, including:
  • the resource allocation indication information is transmitted to the user terminal UE, where the resource allocation indication information includes available OFDM symbol values and frequency resource information of the enhanced physical downlink control channel E-PDCCH for transmitting control signaling.
  • An embodiment of the present invention provides another enhanced PDCCH implementation method, including:
  • the user terminal UE receives the resource allocation indication information sent by the base station, where the resource allocation indication information includes the available orthogonal frequency division multiplexing OFDM symbol value and the frequency resource of the enhanced physical downlink control channel E-PDCCH for transmitting control signaling.
  • the resource allocation indication information includes the available orthogonal frequency division multiplexing OFDM symbol value and the frequency resource of the enhanced physical downlink control channel E-PDCCH for transmitting control signaling.
  • the UE performs E-PDCCH detection on the available OFDM symbol value of the E-PDCCH and the time-frequency resource corresponding to the frequency resource information.
  • An embodiment of the present invention provides a base station, including:
  • a sending unit configured to send resource allocation indication information to the user terminal UE, where the resource allocation indication information includes an available orthogonal frequency division multiplexing OFDM symbol value of the enhanced physical downlink control channel E-PDCCH for transmitting control signaling And frequency resource information.
  • the embodiment of the invention provides a mobile terminal, including:
  • a receiving unit configured to receive resource allocation indication information sent by the base station, where the resource allocation indication information includes an OFDM symbol value and an OFDM symbol of an enhanced physical downlink control channel E-PDCCH for transmitting control signaling Frequency resource information;
  • a detecting unit configured to perform E-PDCCH detection on a time-frequency resource corresponding to the available OFDM symbol value and the frequency resource information of the E-PDCCH.
  • the base station sends the resource allocation indication information to the user terminal, where the resource allocation indication information includes the available OFDM symbol value and frequency of the E-PDCCH for transmitting control signaling.
  • the resource information is such that the mobile terminal performs the E-PDCCH detection according to the available OFDM symbol value and the frequency resource information of the E-PDCCH, thereby implementing the E-PDCCH and increasing the capacity of the PDCCH of the legacy LTE system.
  • FIG. 1 is a schematic diagram of OFDM symbol occupation of a PDCCH and a data channel in a conventional LTE
  • FIG. 2 is a schematic diagram of a possible E-PDCCH resource occupation according to an embodiment of the present invention
  • 2b is a schematic diagram of another possible E-PDCCH resource occupation in the embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an implementation process of an enhanced PDCCH implementation method on a base station side according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of resource occupation when an OFDM and an E-PDCCH are available in an OFDM collision according to an embodiment of the present invention
  • the base station determines an implementation flow diagram of the frequency resource allocated to the UE.
  • FIG. 6 is a schematic flowchart of an implementation process of the enhanced PDCCH implementation method on the UE side according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
  • an enhanced PDCCH implementation method and related devices are provided in an embodiment of the present invention.
  • An embodiment of the present invention provides an enhanced PDCCH (E-PDCCH).
  • E-PDCCH places the information of the control channel on the physical downlink shared channel of the LTE R8/R9/R10 system (PDSCH, Physical Downlink Shared Channel). Transfer on.
  • FIG. 2a it is a schematic diagram of a possible E-PDCCH resource occupation, where the abscissa represents the OFDM symbol value, and the ordinate represents the frequency domain resource.
  • the E-PDCCH occupies the (k+3) ⁇ (k+13) part of the frequency resource on the OFDM symbol; as shown in FIG.
  • E-PDCCH occupies part of the frequency resources on the (k+3th (k+13)th OFDM symbol, where different areas of the shaded part respectively represent E-PDCCHs of different UEs.
  • an embodiment of the present invention provides an enhanced PDCCH implementation method and related equipment, which are used to increase the capacity of a legacy LTE system PDCCH.
  • FIG. 3 it is a schematic flowchart of an implementation process of a PDCCH implementation method according to an embodiment of the present invention, which includes:
  • the S30K sends resource allocation indication information to the UE (user terminal), where the resource allocation indication information includes an available OFDM symbol value and available frequency resource information of the E-PDCCH for transmitting control signaling;
  • the resource allocation indication information sent by the base station to the mobile terminal may include two parts, one part.
  • the sub-content is used to indicate the available OFDM symbol value of the E-PDCCH of the UE, that is, the E-PDCCH of the UE may occupy those OFDM symbols in one TTI.
  • the available OFDM symbol values of the E-PDCCH of the UE are correspondingly below.
  • the OFDM symbol is denoted as Oset; the partial content is used to indicate the available frequency resource of the UE's E-PDCCH, that is, the carrier/carrier group/PRB (physical resource block) that the E-PDCCH of the UE may occupy, etc., where one PRB It can be divided into multiple carrier groups.
  • the frequency resource corresponding to the available frequency resource information of the E-PDCCH of the UE is denoted as Fset, and the carrier is taken as an example for description.
  • Oset ⁇ ( k+3 ), ( k+4 ), ... ( k+13 ) ⁇
  • Fset ⁇ carrier f 8 , carrier f 15 , carrier f 16 , carrier f 17 ⁇ .
  • the enhanced PDCCH implementation method provided by the embodiment of the present invention may further include the following steps: S302: Instruct the UE to perform E-PDCCH on the time-frequency resource corresponding to the available OFDM symbol value of the E-PDCCH and the available frequency resource information. Detection.
  • the UE is instructed to perform E-PDCCH detection on time-frequency resources determined by Oset and Fset.
  • the OFDM symbol and the frequency resource that the PDCCH of the UE may occupy by the PDCCH of the UE, as shown in FIG. 4, is the value of k, k+1, k+2, as shown in FIG.
  • the frequency resource that may be occupied is the carrier carrier f 17
  • the OFDM symbol value that the E-PDCCH of the UE may occupy is k+2, k+3, k+4, ..., k+13, UE E
  • the frequency resource that the PDCCH may occupy is the carrier f 15 to the carrier f 17 , and thus, it can be seen that the OFDM symbol that the PDCCH of the UE may occupy conflicts with the OFDM symbol that the E-PDCCH of the UE may occupy.
  • the solution may be solved as follows:
  • the base station ensures that there is no collision between the PDCCH of all UEs and the OFDM symbols that the E-PDCCH may occupy by scheduling. This is because the subframes that the PDCCH can occupy are variable (subframes, that is, the time-frequency positions determined by each OFDM symbol and each carrier, which can be understood as each square in FIG. 4), so the base station is determining When the PDCCH and the E-PDCCH of each UE are set, the ODFM symbol value and the occupied carrier may be set differently, so that there is no conflict between the two.
  • the enhanced PDCCH implementation method provided by the embodiment of the present invention may further include the following steps:
  • the base station When the base station determines that there is a collision between the E-PDCCH and the available OFDM symbols of the PDCCH, the base station transmits the E-PDCCH on the OFDM symbol that is not occupied by the PDCCH. For example, in the scenario where the collision occurs in the scenario, the base station has a symbol value (k+). 3) The carrier f 15 to the carrier f 17 on the OFDM symbol of ⁇ ( k+13 ) transmit the E-PDCCH, and at the same time, indicate that the UE only needs to be on the OFDM symbol with the symbol value of ( k+3 ) ⁇ ( k+13 ) The E-PDCCH detection is performed on the carrier f 15 to the carrier f 17 . Based on the foregoing analysis, the enhanced PDCCH implementation method provided by the embodiment of the present invention may further include the following steps:
  • the E-PDCCH is transmitted by using an OFDM symbol other than the available OFDM symbols of the PDCCH. That is, if the available OFDM symbol set of the PDCCH is A, the available OFDM symbol set of the E-PDCCH is B, and the intersection of A and B is C, and the set C is the conflicting part of the available OFDM symbols of the E-PDCCH and the PDCCH.
  • the OFDM symbol transmission E-PDCCH is selected in the set (BC).
  • the base station determines that there is a collision between the E-PDCCH and the available OFDM symbols of the PDCCH, the base station does not transmit the E-PDCCH to the UE.
  • the enhanced PDCCH implementation method provided by the embodiment of the present invention may further include the following steps: When determining that the E-PDCCH has a conflict with the available OFDM symbols of the PDCCH, the E-PDCCH is not transmitted.
  • the E-PDCCH may be transmitted on the available OFDM symbols of the E-PDCCH without considering the collision. That is, if the available OFDM symbol set of the PDCCH is A, the available OFDM symbol set of the E-PDCCH is B, and the intersection of A and B is C, and the set C is the conflicting part of the available OFDM symbols of the E-PDCCH and the PDCCH. In the example, the OFDM symbol transmission E-PDCCH is selected in the set B.
  • the frequency resource allocated to the E-PDCCH is determined from the frequency resources corresponding to the available frequency resource information. For example, as shown in FIG. 4, the time-frequency resource that can be used to transmit the E-PDCCH is determined by the OFDM symbol corresponding to the symbol value (k+2) ⁇ (k+13) and the carrier f 15 to the carrier f 17 Frequency position. For each UE, the base station needs to determine to transmit the E-PDCCH for the UE specifically at those time-frequency locations.
  • the base station determines a flow chart of the implementation of the frequency resource allocated to the UE, and includes the following steps:
  • the frequency resource corresponding to the available frequency resource information is divided into multiple frequency resource sets according to a preset rule.
  • S502 Select, according to system information, and/or CQI (channel shield quantity indication) information fed back by the UE, a frequency resource set from the determined frequency resource set;
  • CQI channel shield quantity indication
  • the base station may select a frequency resource set from the set of the determined frequency resources according to the CQI information or the system information fed back by the UE, where the system information may be the scheduling of the base station. Information, occupancy of other UEs on frequency resources, etc.
  • the basic unit of the frequency resource may be a carrier, may be a carrier group, or may be a PRB or the like.
  • the basic unit of the frequency resource is taken as an example for description.
  • the Fset includes the carriers ft, f 2 , f 3 , f 4 , f 5 fi 8 , selecting a frequency resource subset of the E-PDCCH consisting of K carriers from the Fset, denoted as S_K_1,
  • the base station may select a frequency resource subset from Lset_3_6 for transmission according to information such as CQI fed back by the UE. For example, S_3_1 is selected, that is, the E-PDCCH is transmitted to the UE at the carriers ft, f 2 , and f 3 .
  • the base station determines the frequency resource that can transmit the E-PDCCH for the UE, and the base station can transmit the available OFDM symbols of the E-PDCCH to the UE, so that the time-frequency resource of the E-PDCCH can be transmitted to the UE.
  • control signaling may be transmitted on the determined time-frequency resource according to the following principles:
  • Step 1 In the first OFDM symbol in Oset (sorted in chronological order), control signaling is sequentially allocated in the determined frequency domain position;
  • control signaling is sequentially allocated on the carriers ft, f 2 , and f 3 .
  • Step 2 In the second OFDM symbol in Oset (sorted in chronological order), the remaining control signaling is sequentially allocated in the determined frequency domain position;
  • control signaling is sequentially allocated on the carriers ft, f 2 , and f 3 .
  • the remaining control signaling is sequentially allocated in the determined frequency domain position on each available OFDM symbol in turn until the allocation is completed.
  • the enhanced PDCCH implementation method provided by the embodiment of the present invention may further include the steps of: sequentially selecting one OFDM symbol in chronological order;
  • control signaling is allocated at a position corresponding to the frequency resource included in the selected frequency resource set.
  • the RE location does not allocate control signaling.
  • another enhanced PDCCH implementation method and related device are provided in the embodiment of the present invention.
  • the method for solving the problem between the method and the related device is similar to the enhanced PDCCH implementation method, and the method and related device are For the implementation, refer to the implementation of the enhanced PDCCH implementation method described above, and the repeated description is not repeated.
  • FIG. 6 the implementation flow of the enhanced PDCCH implementation method on the UE side of the embodiment of the present invention is shown in FIG.
  • the diagram includes the following steps:
  • the UE receives the resource allocation indication information sent by the base station, where the resource allocation indication information includes an OFDM symbol value and frequency resource information of an E-PDCCH for transmitting control signaling.
  • the UE performs E-PDCCH detection on the available OFDM symbol value of the E-PDCCH and the time-frequency resource corresponding to the frequency resource information.
  • the UE may further include the following steps before detecting the E-PDCCH by using the OFDM symbol value of the E-PDCCH and the location corresponding to the frequency resource information:
  • the UE determines that there is no collision between the E-PDCCH and the available OFDM symbols of the PDCCH.
  • the UE may process the following manner:
  • the UE determines that the available OFDM symbols of the E-PDCCH indicated in the resource allocation indication information collide with the available OFDM symbols of the PDCCH indicated by the PCFICH, the detection error is considered, and the E-PDCCH detection is not performed.
  • the implementation process of the enhanced PDCCH implementation method on the UE side may further include the following steps: When the UE determines that the E-PDCCH has a collision with the available OFDM symbols of the PDCCH, the E-PDCCH detection is not performed.
  • E-PDCCH detection is performed at the corresponding time-frequency position.
  • the implementation process of the enhanced PDCCH implementation method on the UE side may further include the following steps:
  • the E-PDCCH is detected according to the resource allocation indication information.
  • a schematic structural diagram of a base station according to an embodiment of the present invention includes:
  • the sending unit 701 is configured to send, to the UE, resource allocation indication information, where the resource allocation indication information includes an Orthogonal Frequency Division Multiplexing (OFDM) symbol value and frequency resource information of an E-PDCCH for transmitting control signaling.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the base station provided by the embodiment of the present invention may further include:
  • the indicating unit 702 is configured to instruct the UE to perform E-PDCCH detection on the time-frequency resource corresponding to the available OFDM symbol value of the E-PDCCH and the available frequency resource information.
  • the base station provided by the embodiment of the present invention may further include:
  • the first determining unit is configured to determine, according to the frequency resource corresponding to the available frequency resource information, the frequency resource allocated for the E-PDCCH, before sending the resource allocation indication information to the UE.
  • the first determining unit may include:
  • a sub-unit configured to divide the frequency resource corresponding to the available frequency resource information into multiple frequencies according to a preset rule Rate resource collection
  • Selecting a subunit configured to select a frequency resource set from the frequency resource set according to the system information, and/or the channel shield quantity CQI information fed back by the UE;
  • a determining subunit configured to determine a frequency resource included in the frequency resource set selected by the selecting subunit as a frequency resource allocated by the E-PDCCH.
  • the base station provided by the embodiment of the present invention may further include:
  • a selecting unit configured to sequentially select one OFDM symbol in chronological order
  • an allocating unit configured to allocate control signaling at a location corresponding to the frequency resource included in the selected frequency resource set on the selected OFDM symbol.
  • the base station provided by the embodiment of the present invention may further include:
  • a second determining unit configured to determine, before sending the resource allocation indication information to the UE, that there is no conflict between the E-PDCCH and the available OFDM symbols of the PDCCH and the frequency resources allocated for the E-PDCCH and the PDCCH.
  • the base station provided by the embodiment of the present invention may further include:
  • a processing unit configured to determine, when the E-PDCCH has a collision with an available OFDM symbol of the PDCCH, select an OFDM symbol other than the available OFDM symbol of the PDCCH to transmit the E-PDCCH in the available OFDM symbols of the E-PDCCH; or determine the E-PDCCH When the PDCCH has a collision with the available OFDM symbols of the PDCCH, the E-PDCCH is not transmitted; or when the E-PDCCH is determined to collide with the available OFDM symbols of the PDCCH, the E-PDCCH is transmitted on the available OFDM symbols of the E-PDCCH.
  • a schematic structural diagram of a mobile terminal according to an embodiment of the present invention includes:
  • the receiving unit 801 is configured to receive resource allocation indication information that is sent by the base station, where the resource allocation indication information includes an OFDM symbol value and an available frequency resource information of an E-PDCCH for transmitting control signaling.
  • the detecting unit 802 is configured to perform E-PDCCH detection on the available OFDM symbol value of the E-PDCCH and the time-frequency resource corresponding to the available frequency resource information.
  • the mobile terminal provided by the embodiment of the present invention may further include:
  • a determining unit configured to determine that the E-PDCCH does not collide with the available OFDM symbols of the PDCCH before performing E-PDCCH detection on the available OFDM symbol value of the E-PDCCH and the time-frequency resource corresponding to the available frequency resource information.
  • the mobile terminal provided by the embodiment of the present invention may further include:
  • a processing unit configured to: when determining that there is a conflict between the E-PDCCH and the available OFDM symbols of the PDCCH,
  • E-PDCCH detection or used to perform E-PDCCH detection according to resource allocation indication information when determining that there is a collision between the E-PDCCH and the available OFDM symbols of the PDCCH.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be applied to one or more computers in which computer usable program code is included. A form of computer program product embodied on a storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.).
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the base station sends the resource allocation indication information to the user terminal, where the resource allocation indication information includes the available OFDM symbol value and frequency of the E-PDCCH for transmitting control signaling.
  • the resource information is such that the mobile terminal performs the E-PDCCH detection according to the available OFDM symbol value and the frequency resource information of the E-PDCCH, thereby implementing the E-PDCCH and increasing the capacity of the PDCCH of the legacy LTE system.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

L'invention se rapporte à un procédé pour la mise en œuvre d'un canal de commande de liaison descendante physique amélioré (E-PDCCH) et à un dispositif associé, qui permettent d'accroître la capacité d'un système à PDCCH dans un système LTE classique. Le procédé pour la mise en œuvre d'un PDCCH amélioré consiste à attribuer des informations d'indication d'attribution de ressources à un équipement utilisateur (UE), ces informations d'indication d'attribution de ressources comprenant une valeur de symbole de multiplexage par répartition orthogonale de la fréquence (OFDM) disponible et des informations de ressources de fréquences disponibles qui concernent un E-PDCCH utilisé lors de la transmission d'une signalisation de commande.
PCT/CN2012/083654 2011-10-31 2012-10-29 Procédé pour la mise en œuvre d'un pdcch amélioré et dispositif associé Ceased WO2013064043A1 (fr)

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CN105722229B (zh) * 2016-02-05 2019-08-27 北京佰才邦技术有限公司 信道的选择方法和装置
CN110199553B (zh) 2017-01-05 2020-10-30 Oppo广东移动通信有限公司 用于传输信息的方法、终端设备和网络设备
CN108811052B (zh) 2017-04-28 2021-05-14 电信科学技术研究院 一种下行控制信道检测接收方法、终端和网络侧设备
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CN116472774A (zh) * 2023-02-17 2023-07-21 北京小米移动软件有限公司 资源确定方法、装置及存储介质

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