WO2014067350A1 - Procédé et dispositif permettant de configurer un ensemble de ressources de canal de commande de liaison descendante physique amélioré - Google Patents

Procédé et dispositif permettant de configurer un ensemble de ressources de canal de commande de liaison descendante physique amélioré Download PDF

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Publication number
WO2014067350A1
WO2014067350A1 PCT/CN2013/083265 CN2013083265W WO2014067350A1 WO 2014067350 A1 WO2014067350 A1 WO 2014067350A1 CN 2013083265 W CN2013083265 W CN 2013083265W WO 2014067350 A1 WO2014067350 A1 WO 2014067350A1
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WO
WIPO (PCT)
Prior art keywords
elements
resource set
resource
prb
prb pairs
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PCT/CN2013/083265
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English (en)
Chinese (zh)
Inventor
陈艺戬
戴博
左志松
石靖
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中兴通讯股份有限公司
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Publication of WO2014067350A1 publication Critical patent/WO2014067350A1/fr

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    • 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
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

Definitions

  • the embodiments of the present invention relate to the field of communications, and specifically relate to a method and apparatus for configuring a set of enhanced physical downlink control channel resources.
  • the downlink physical layer control signaling in the LTE (Long Term Evolution) system and the LTE-Advance (LTE) system includes downlink grant related downlink grant (DL Grant) information that the terminal needs to know and the UE needs to know.
  • DL Grant downlink grant related downlink grant
  • UL Grant Uplink transmission related uplink grant
  • the physical layer control signaling is performed on the PDCCH (Physical Downlink Control Channel), where the physical layer control signaling mainly refers to user-specific control signaling of the physical layer.
  • the physical layer control channel for transmitting physical layer control signaling is generally configured in the first N OFDM (Orthogonal Frequency Division Multiplexing) , Orthogonal Frequency Division Multiplexing (OFDM) is transmitted on the symbol. Generally, these N symbols are called control signaling transmission areas.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the available transmission resources of the control signaling transmission area (referred to as the first control signaling transmission area or the first control signaling area) are divided into multiple CCE (Control Channel Element) resource units, and control
  • the information occupied resources are allocated in units of CCE, and the resource unit CCE here can be further subdivided into multiple REGs (Resource Element Group).
  • a CCE consists of multiple discrete REGs, typically 9 REGs form a CCE. Further, each REG consists of multiple basic resource units.
  • the proprietary and public control signaling is transmitted in CCE as a resource unit, and then mapped to the corresponding REG resource, and further mapped to multiple PRB pairs (Physical Resource Block Pairs, sometimes referred to as PRBs). On the RE (Resource Element, the smallest resource unit).
  • the terminal generally performs blind detection in the following manner: Calculate the starting position of the proprietary control signaling and the public control signaling. The relationship between the aggregation level of blind signaling detection and the number of blind detections is shown in Table 1. Table 1
  • control signaling transmission resources allocated by the user are not continuous, which brings many difficulties to the implementation of the closed-loop precoding technology in the multi-antenna system, so that the control signaling region can only use the diversity technology and it is difficult to use the closed-loop precoding. technology.
  • the main reason is that the demodulation pilot design and channel state information feedback of the first control signaling area are very difficult to design. Therefore, the control signals in the existing version only support the discontinuous resource transmission and diversity techniques.
  • the design consideration opens up a new control channel region (referred to as a second control signaling transmission region or a second control signaling region).
  • the control signaling transmission resource of the same UE may be a continuous time-frequency resource, so that the closed-loop pre-coding technology can be supported, and the transmission performance of the control information is improved.
  • the area of control signaling is shown in Figure 1. This method allocates part of the transmission resources in the original R8/9/10 Physical Downlink Shared Channel (PDSCH) transmission area for the new control signaling transmission area, which can make the control signal
  • PDSCH Physical Downlink Shared Channel
  • the closed-loop precoding technology is supported during transmission, and the control signaling capacity is increased to support more user control signaling.
  • the control channel transmitted by the second control signaling area may be referred to as a second control channel or an enhanced PDCCH (ePDCCH).
  • ePDCCH enhanced PDCCH
  • the base station first informs the terminal of the number of resources occupied by the ePDCCH resource set (ePDCCH resource set) and the occupied resources, since there is no additional information to inform the terminal how much transmission resource will be occupied by the coded modulated control information.
  • the location for example, 4 PRB pairs, such as shown in Figure 1, is 4 of all PRB pairs of the entire bandwidth, or the terminal is determined according to the UE ID or other UE specific parameters.
  • the ePDCCH resource set actually limits the control information transmitted on all ePDCCHs of the terminal to be included in the set. Of course, the set is not necessarily full.
  • the base station and the terminal also stipulate a basic resource allocation unit as the minimum allocation granularity, and then further stipulates the size of several occupied resources, generally an aggregation of one or more resource allocation units, and aggregation of N resource allocation units is called an aggregation level. N.
  • the base station may send the coded modulated control information in one of the sizes, and the terminal may blindly detect the re-agreed resource sizes, which may also be referred to as several aggregation levels of the detection convention.
  • a basic resource unit eCCE is defined. The eCCE is similar to the previous CCE. In the second control area, eCCE can borrow the definition of the old version of CCE or modify it slightly. It can also be newly defined. It can be a fixed size or Variable size.
  • the eCCE can contain both distributed (distributed) eCCEs and Localized (concentrated) eCCEs, as defined in Figure 2 and Figure 3, respectively.
  • the control signaling can define different aggregation levels based on the eCCE.
  • the localized aggregation level set is ⁇ 1, 2, 4, 8 ⁇ or ⁇ 1, 2, 4, 8, 16 ⁇ , then different aggregation levels represent Different resource sizes.
  • the aggregation aggregation level set is ⁇ 1, 2, 4, 8, 16 ⁇ .
  • the base station may configure multiple ePDCCH resource sets for the terminal, and each ePDCCH resource set may uniquely correspond to one Localized type (which may be simply referred to as L type). Or the type of Distributed (may be referred to as D type).
  • the type of the ePDCCH resource set is the same as the ePDCCH transmission type.
  • the type of the ePDCCH resource set and the ePDCCH transmission type may be Localized or Distributed.
  • the type refers to: If configured as a distributed type, only the transmission or only the ePDCCH resource set is transmitted. The distributed ePDCCH is detected. If the localized type is configured, only the Localized ePDCCH is transmitted or only detected in the ePDCCH resource set.
  • the Localized ePDCCH is a plurality of Localized eCCEs, and the distributed ePDCCH is aggregated by multiple distributed eCCEs.
  • the ePDCCH resource set can occupy M PRB pairs, and the M does not exceed the maximum number of PRBs supported by the downlink system bandwidth, and the related technologies have the same set restriction on the configurable PRB pair of the localized set and the distributed set. For example, the relationship between the number of configurable PRB pairs and the value of the configurable PRB pair is shown in Table 2.
  • the ePDCCH resource set contains too many PRB pairs, and the utilization of the distributed ePDCCH is low.
  • the distributed ePDCCH transmission causes the resource waste to be very serious.
  • the embodiments of the present invention provide a method and apparatus for configuring a set of enhanced physical downlink control channel resources, and differently limit the number of PRB pairs that can be configured for localized and distributed sets.
  • an embodiment of the present invention provides a method for configuring a set of enhanced physical downlink control channel resources, where a base station configures an ePDCCH Resource Set to enhance a number of PRB physical resource blocks included in a physical downlink control channel resource set, The base station configures the resource set of the localized centralized type to include the number of PRB pairs, and the base station configures the resource set of the distributed distribution type to include the number of PRB pairs as the element of the set Y; wherein, when the system bandwidth is supported When the maximum number of PRBs is preset Threshold Xthresh, Y is not equal to X.
  • ⁇ is equal to ⁇ .
  • Y is a true subset of X.
  • ⁇ Xthresh the maximum value of the elements in Y is smaller than the maximum value of the elements in X.
  • the relationship with X and ⁇ is as follows:
  • the value of Xthresh is 16, 24, 32 or 40.
  • the embodiment of the present invention further provides an apparatus for configuring a set of enhanced physical downlink control channel resources, where the ePDCCH Resource Set is configured to enhance the number of PRB physical resource blocks included in the physical downlink control channel resource set, where the apparatus includes :
  • the first configuration unit is configured to: configure the resource set of the localized centralized type to include the number of PRB pairs of the set X,
  • a second configuration unit configured to: configure a resource set of the distributed distribution type to include an element of the set of PRB pairs;
  • the determining unit is further configured to: when Xthresh, set ⁇ equal to ⁇ .
  • the determining unit is further configured to: set a true subset in which Y is X.
  • the determining unit is further configured to: when ⁇ ⁇ 811, set the element in Y The maximum value is less than the maximum value of the elements in X.
  • the determining unit is further configured to: set the relationship between ⁇ ⁇ and X and Y as shown in the following table:
  • the base station configures the resource set of the localized type to include the number of PRB pairs, and sets the number of PRB pairs included in the resource set of the distributed type to the element of the set Y; and when Xthresh, Y is not equal to X, which limits the number of configurable PRB pairs for localized and distributed set.
  • 1 is a schematic diagram of an area of control signaling
  • FIG. 2 is a schematic diagram of the definition of a distributed eCCE
  • Figure 3 is a schematic diagram of the definition of Localized eCCE
  • FIG. 4 is a schematic structural diagram of an apparatus for configuring a set of enhanced physical downlink control channel resources according to an embodiment of the present invention.
  • Preferred embodiment of the invention Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.
  • the embodiment of the present invention provides a method for configuring a set of enhanced physical downlink control channel resources.
  • the base station configures the number of PRBs included in the ePDCCH Resource Set by using the high layer signaling, and the number of PRB pairs included in the resource set of the localized type is set by the base station.
  • the elements of the set X are configured to allocate the number of PRB pairs included in the resource set of the distributed type to the elements of the set Y; wherein, when the maximum number of PRBs supported by the system bandwidth is a preset threshold Xthresh, Y is not equal to X.
  • ⁇ is equal to ⁇ .
  • Y is a true subset of X.
  • the maximum value of the elements in Y is smaller than the maximum value of the elements in X.
  • the relationship with X and Y is as follows:
  • the value of Xthresh is 16, 24, 32 or 40.
  • the maximum number of PRB in the system bandwidth supported ⁇ ⁇ is 6-7, distributed resource set comprises only two PRB pairs, localized in the resource set may comprise two or four PRB pairs, flexible configuration selected by the base station.
  • the distributed resource set can only contain 2 or 4 PRB pairs.
  • the localized resource set can contain 2 or 4 or 8 PRB pairs, which can be flexibly selected by the base station configuration.
  • the distributed resource set and the localized resource set can contain 2 or 4 or 8 PRB pairs, which can be flexibly selected by the base station configuration.
  • the distributed resource set can only contain 2 PRB pairs.
  • the localized resource set can contain 2 or 4 PRB pairs, which can be flexibly selected by the base station.
  • the distributed resource set can only contain 2 or 4 PRB pairs.
  • the localized resource set can contain 4 or 8 PRB pairs, which can be flexibly selected by the base station configuration.
  • Supported in system bandwidth is From 16 to 110, the distributed resource set and the localized resource set clause can contain 4 or 8 PRB pairs, which can be flexibly selected by the base station configuration.
  • the maximum number of PRB in the system bandwidth supported ⁇ ⁇ is 6-7, distributed resource set comprises only two PRB pairs, localized in the resource set may comprise two or four PRB pairs, flexible configuration selected by the base station.
  • the system bandwidth support is 8 - 11
  • the distributed resource set is only allowed to contain 2, and the localized resource set can contain 2, 4 or 8 PRB pairs, which can be flexibly selected by the base station configuration.
  • the system bandwidth support is 12-23, the distributed resource set can only contain 2 or 4 PRB pairs.
  • the localized resource set can contain 2, 4 or 8 PRB pairs, which can be flexibly selected by the base station configuration.
  • the N ⁇ of the system bandwidth is 24-110, the distributed resource set and the localized resource set can contain 2, 4 or 8 PRB pairs, which can be flexibly selected by the base station configuration.
  • the maximum number of PRB in the system bandwidth supported ⁇ ⁇ is 6-7, distributed resource set comprises only two PRB pairs, localized in the resource set may comprise two or four PRB pairs, flexible configuration selected by the base station.
  • the distributed resource set can only contain two.
  • the localized resource set can contain four or eight PRB pairs, which can be flexibly selected by the base station.
  • the distributed resource set can only contain 2 or 4 PRB pairs.
  • the localized resource set can contain 4 or 8 PRB pairs, which can be flexibly selected by the base station.
  • the distributed resource set and the localized resource set can contain 4 or 8 PRB pairs, which can be flexibly selected by the base station configuration.
  • the elements in Y that is, the number of PRB pairs allowed in the distributed resource set
  • the elements in X That is, the relationship between the number of PRB pairs that can be included in the localized resource set is as shown in the above table, and will not be described here.
  • the relationship with X and Y is shown in Table 10:
  • the elements in Y that is, the number of PRB pairs allowed in the distributed resource set
  • the elements in X That is, the relationship between the number of PRB pairs that can be included in the localized resource set is as shown in the above table, and will not be described here.
  • the elements in Y that is, the number of PRB pairs allowed in the distributed resource set
  • the elements in X That is, the relationship between the number of PRB pairs that can be included in the localized resource set is as shown in the above table, and will not be described here.
  • the elements in Y that is, the number of PRB pairs allowed in the distributed resource set
  • the elements in X That is, the relationship between the number of PRB pairs that can be included in the localized resource set is as shown in the above table, and will not be described here.
  • the elements in Y that is, the number of PRB pairs allowed in the distributed resource set
  • the elements in X That is, the relationship between the number of PRB pairs that can be included in the localized resource set is as shown in the above table, and will not be described here.
  • the elements in Y that is, the number of PRB pairs allowed in the distributed resource set
  • the elements in X That is, the relationship between the number of PRB pairs that can be included in the localized resource set is as shown in the above table, and will not be described here.
  • the embodiment of the present invention further provides an apparatus for configuring a set of enhanced physical downlink control channel resources, and configuring an ePDCCH Resource Set to enhance the number of PRB physical resource blocks included in the physical downlink control channel resource set by using high-layer signaling, as shown in FIG. 4
  • the device includes:
  • the first configuration unit 41 is configured to configure a resource set of the localized centralized type to include an element of the set X of the PRB Pair,
  • the second configuration unit 42 is configured to configure, by the resource set of the distributed distribution type, the number of the PRB Pairs that are the elements of the set Y;
  • the determining unit 43 is configured to determine a relationship between X and Y, wherein Y is not equal to X when the maximum PRB number supported by the system bandwidth is ⁇ preset threshold Xthresh.
  • the determining unit 43 is further configured to: when w ⁇ xthr es h, set ⁇ equal to ⁇ .
  • the determining unit 43 is further configured to: set a true subset where Y is X.
  • the determining unit 43 is further configured to: when ⁇ Xthresh, set the maximum value of the elements in Y to be smaller than the maximum value of the elements in X.
  • the determining unit 43 is further configured to: set a relationship between ⁇ ⁇ and X and ⁇ as shown in the following table: or,
  • the device configured to enhance the physical downlink control channel resource set may be a function module in the base station or the base station.
  • the base station configures the resource set of the localized type to include the number of PRB pairs, and sets the number of PRB pairs included in the resource set of the distributed type to the element of the set Y; and when ⁇ Xthresh Y is not equal to X, which limits the number of configurable PRB pairs for localized and distributed set.

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

Abstract

L'invention concerne un procédé et un dispositif permettant de configurer un ensemble de ressources de canal de commande de liaison descendante physique amélioré (ensemble de ressources ePDCCH). Au cours dudit procédé, une station de base configure grâce à une signalisation de haut niveau le nombre de blocs de ressources physiques (PRB) compris dans l'ensemble de ressources ePDCCH. Ce procédé est caractérisé en ce que le nombre de paires de PRB comprises dans un ensemble de ressources du type localisé qui est configuré par la station de base est un élément d'un ensemble X, tandis que le nombre de paires de PRB comprises dans un ensemble de ressources du type distribué qui est configuré par la station de base est un élément d'un ensemble Y. Lorsque le nombre maximal de PRB acceptés par la bande passante du système, NDL RB, est inférieur à une valeur seuil prédéfinie, Xthresh, Y n'est pas égal à X.
PCT/CN2013/083265 2012-11-01 2013-09-11 Procédé et dispositif permettant de configurer un ensemble de ressources de canal de commande de liaison descendante physique amélioré WO2014067350A1 (fr)

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CN201210430543.8A CN103796313B (zh) 2012-11-01 2012-11-01 配置增强物理下行控制信道资源集合的方法和装置
CN201210430543.8 2012-11-01

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Citations (1)

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US8073062B2 (en) * 2007-02-08 2011-12-06 Motorola Mobility, Inc. Method and apparatus for downlink resource allocation in an orthogonal frequency division multiplexing communication system
JP5441932B2 (ja) * 2009-01-30 2014-03-12 パナソニック株式会社 無線通信基地局装置、無線通信端末装置およびｃｃｅ割当方法

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