WO2012171395A1 - Procédé, système et dispositif d'attribution et de détermination de pdcch - Google Patents

Procédé, système et dispositif d'attribution et de détermination de pdcch Download PDF

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Publication number
WO2012171395A1
WO2012171395A1 PCT/CN2012/073456 CN2012073456W WO2012171395A1 WO 2012171395 A1 WO2012171395 A1 WO 2012171395A1 CN 2012073456 W CN2012073456 W CN 2012073456W WO 2012171395 A1 WO2012171395 A1 WO 2012171395A1
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Prior art keywords
user equipment
pdcch
transmission mode
pdsch
crs
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PCT/CN2012/073456
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English (en)
Chinese (zh)
Inventor
张然然
苏昕
沈祖康
赵锐
潘学明
丁昱
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电信科学技术研究院
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Publication of WO2012171395A1 publication Critical patent/WO2012171395A1/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

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, system, and device for allocating and determining a PDCCH. Background technique
  • a Physical Downlink Control Channel (PDCCH) is transmitted in each radio subframe and shared with a physical downlink (Physical Downlink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • TDM Time Division Multiple
  • the PDCCH is transmitted through the first N Orthogonal Frequency Division Multiplexing (OFDM) symbols of one downlink subframe.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the control region for transmitting the PDCCH in the LTE system is composed of logically divided Control Channel Elements (CCEs).
  • the downlink control information (DCI) is also based on the CCE.
  • a DCI for a User Equipment (UE) can be sent in N consecutive CCEs. In the LTE system, the N is possible. The value is 1, 2, 4, and 8 and is called the CCE aggregation level.
  • the UE performs PDCCH blind detection in the control region to search whether there is a PDCCH for the PDCCH.
  • the blind detection uses the UE's Radio Network Temporary Identifier (RNTI) to decode different DCI formats and CCE aggregation levels. Attempt, if the decoding is correct, the DCI for the UE is received.
  • the LTE UE needs to perform blind detection on the control region for each downlink subframe in the non-DRX (Discontinuous Reception) state to search for the PDCCH.
  • RNTI Radio Network Temporary Ident
  • the control area in one subframe of the LTE system is composed of two spaces, namely, a Common Search Space (CSS) and a UE-specific Search Space (UESS).
  • the common search space is mainly used for transmitting the DCI of the scheduling cell-specific control information (such as system information, paging message, multicast power control information, etc.) of the user equipment, and the user equipment exclusive search space is mainly used for transmitting the scheduling for each UE resource. DCI.
  • the common search space in each downlink subframe includes the first 16 CCEs, and the CCE aggregation level in the common search space only supports 4, 8; the starting CCE of the UE search space exclusive to each user equipment in each downlink subframe The location is related to the subframe number, the RNTI of the UE, etc., and the CCE aggregation level 1 , 2, 4, 8 is supported in the user equipment exclusive search space.
  • blind detection of each aggregation level corresponds to one search space, that is, UEs blindly check different aggregation levels are different
  • the search space is carried out within.
  • the PDCCH is enhanced.
  • the current scheme is to transmit the enhanced PDCCH in the PDSCH domain in the downlink subframe while retaining the original PDCCH domain.
  • the original PDCCH domain still uses the existing transmission and reception technologies, and uses the original PDCCH resources, such as transmit diversity when transmitting, and uses cell-specific reference signal (CRS) for blind detection when receiving.
  • CRS cell-specific reference signal
  • this part of the PDCCH domain is called a legacy PDCCH domain.
  • the enhanced PDCCH domain can use more advanced transmission and reception technologies, and use some resources of the original PDSCH, such as precoding during transmission, and based on UE-Specific Reference Signal (UE-RS). That is, the Demodulation Reference Symbol (DMRS) is used for detection, and the time-frequency resource transmission outside the Legacy PDCCH domain is occupied.
  • UE-RS UE-Specific Reference Signal
  • DMRS Demodulation Reference Symbol
  • This part of the PDCCH domain is called an Enhanced PDCCH domain.
  • the PDCCH resources of the Long Term Evolution-Advanced (LTE-A) system after the PDCCH is enhanced will include the legacy PDCCH domain (legacy PDCCH) and the enhanced PDCCH domain (Enhanced PDCCH).
  • the existing version of the user equipment for example, Rel-8/9/lO
  • the DCI of all the old user equipments is still allocated in the Legacy PDCCH domain, and the new version of the user equipment (for example, Rel- The DCI of 11 or / and other higher versions can be transmitted either in the Legacy PDCCH domain or in the Enhanced PDCCH domain.
  • a method, system and device for allocating and determining a PDCCH according to an embodiment of the present invention are used to allocate a PDCCH resource under a PDCCH enhancement scheme.
  • the network side notifies the transmission mode of the PDSCH corresponding to the user equipment
  • the network side allocates a corresponding PDCCH resource to the user equipment according to a transmission mode of the PDSCH corresponding to the user equipment;
  • the PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.
  • the PDCCH resource includes a legacy PDCCH domain and an enhanced PDCCH domain.
  • a network side device for allocating a PDCCH according to an embodiment of the present invention includes:
  • a notification module configured to notify a user of a PDSCH transmission mode corresponding to the device
  • An allocating module configured to allocate a corresponding PDCCH resource to the user equipment according to a transmission mode of a PDSCH corresponding to the user equipment;
  • the PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.
  • a transmission mode determining module configured to determine a transmission mode of the corresponding PDSCH that is notified by the network side
  • a resource determining module configured to determine a PDCCH resource according to a transmission mode of the corresponding PDSCH, where the PDCCH resource includes a Legacy PDCCH region and an Enhanced PDCCH region.
  • a network side device configured to notify a transmission mode of the PDSCH corresponding to the user equipment, and allocate a corresponding PDCCH resource to the user equipment according to a transmission mode of the PDSCH corresponding to the user equipment;
  • a user equipment configured to determine a transmission mode of the corresponding PDSCH that is notified by the network side, and determine a PDCCH resource according to the corresponding transmission mode of the PDSCH;
  • the PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.
  • the PDCCH resources can be allocated under the PDCCH enhancement scheme, so that the effective transmission and reception of the PDCCH can be ensured;
  • FIG. 1 is a schematic structural diagram of a system for determining a PDCCH according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a network side device for allocating a PDCCH according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of a user equipment for determining a PDCCH according to an embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of a method for allocating a PDCCH according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of a method for determining a PDCCH according to an embodiment of the present invention. detailed description
  • the network side notifies the transmission mode of the PDSCH corresponding to the user equipment, and allocates a corresponding PDCCH resource to the user equipment according to the transmission mode of the PDSCH corresponding to the user equipment; where the PDCCH resource includes a legacy PDCCH domain and an enhanced PDCCH domain. Since PDCCH resources can be allocated under the PDCCH enhancement scheme, efficient transmission and reception of the PDCCH can be ensured.
  • the CRS is used for channel measurement and demodulation, and the part of the PDCCH region for DCI transmission in single port or transmit diversity mode is used.
  • the Enhanced PDCCH field is: Used in subsequent LTE-A standards (eg, Rel-11 or/and other higher versions), as defined in existing LTE/LTE-A standards (eg, Rel-8/9/lO) The portion of the PDCCH region in which the DCI transmission is performed by some resources in the data region (eg, other OFDM symbols outside the control region).
  • the system for determining a PDCCH includes: a network side device 10 and a user equipment 20.
  • the network side device 10 is configured to notify the user equipment 20 of the PDSCH transmission mode, according to the user equipment.
  • the transmission mode of the corresponding PDSCH is 20, and the corresponding PDCCH resource is allocated to the user equipment 20;
  • the user equipment 20 is configured to determine a transmission mode of the corresponding PDSCH that is notified by the network side, according to the corresponding
  • a transmission mode of the PDSCH determining a PDCCH resource
  • the PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.
  • the network side device 10 notifies the transmission mode of the PDSCH corresponding to the user equipment 20 by high layer signaling. For example, use the transmissionMode in the high-level signaling AntennalnfoDedicated field to indicate.
  • DCI grid C-RNTI corresponds to double layer transmission, ports 7 and 8; or 2B UESS single layer transmission, port 7 or 8
  • PBCH is a single port
  • the single port the end
  • the network side allocates corresponding PDCCH resources to the user equipment according to the PDSCH transmission mode corresponding to the user equipment.
  • PDSCH transmission mode corresponding to the user equipment.
  • the network side device 10 allocates the CSS and the UESS corresponding to the user equipment to the legacy PDCCH domain;
  • the user equipment 20 determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.
  • the transmission mode of the PDSCH based on CRS for channel measurement and signal demodulation is transmission mode 1 ⁇ 6, see Table 1.
  • the user equipment 20 determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.
  • the transmission mode of the PDSCH based on the CRS for channel measurement and based on the UE-RS port 5 or CRS is the transmission mode 1 ⁇ 7, see Table 1.
  • Manner 3 If the transmission mode of the PDSCH corresponding to the user equipment 20 is based on the CRS for channel measurement, the network side device 10 allocates the CSS and the UESS corresponding to the user equipment 20 to the legacy PDCCH domain; correspondingly, if corresponding The transmission mode of the PDSCH is based on CRS for channel measurement, and the user equipment 20 determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.
  • the transmission mode of the PDSCH based on CRS for channel measurement is the transmission mode 1 ⁇ 8, see Table 1.
  • Mode 4 If the transmission mode of the PDSCH corresponding to the user equipment 20 is not based on the CRS for channel measurement and signal demodulation, the network side device 10 allocates the CSS corresponding to the user equipment 20 to the legacy PDCCH domain, and allocates the UESS. To the Enhanced PDCCH field;
  • the user equipment 20 determines that the corresponding CSS is in the Legacy PDCCH domain, and the UESS is in the Enhanced PDCCH region.
  • the CSS and the UESS corresponding to the user equipment 20 are allocated to the Enhanced PDCCH domain;
  • the CSS is in the Enhanced PDCCH domain and the UESS is in the legacy PDCCH domain.
  • Manner 5 If the transmission mode of the PDSCH corresponding to the user equipment 20 is not based on CRS for channel measurement and is not demodulated based on the port 5 or CRS of the UE-RS, the network side device 10 sets the CSS corresponding to the user equipment 20. Assigned to the legacy PDCCH domain, the UESS is assigned to the Enhanced PDCCH domain; Correspondingly, if the transmission mode of the corresponding PDSCH is not based on CRS for channel measurement and is not demodulated based on the UE-RS port 5 or CRS, the user equipment 20 determines that the corresponding CSS is in the Legacy PDCCH domain, UESS In the Enhanced PDCCH field.
  • the CSS and the UESS corresponding to the user equipment 20 are allocated to the Enhanced PDCCH domain;
  • the CSS is in the Enhanced PDCCH domain and the UESS is in the legacy PDCCH domain.
  • Mode 6 If the transmission mode of the PDSCH corresponding to the user equipment 20 is not based on the CRS for channel measurement, the network side device 10 allocates the CSS corresponding to the user equipment 20 to the legacy PDCCH domain, and allocates the UESS to the Enhanced PDCCH domain.
  • the user equipment 20 determines that the corresponding CSS is in the Legacy PDCCH domain, and the UESS is in the Enhanced PDCCH domain.
  • the CSS and the UESS corresponding to the user equipment 20 are allocated to the Enhanced PDCCH domain;
  • the CSS is in the Enhanced PDCCH domain and the UESS is in the legacy PDCCH domain.
  • the allocation may be performed in any of the above manners; and the foregoing may be performed in multiple ways without conflict.
  • the network side device in the embodiment of the present invention may be a station (such as a macro base station, a home base station, etc.), or may be an RN (Relay Node) device having an independent cell identifier (cell ID). It can also be other network side devices.
  • a station such as a macro base station, a home base station, etc.
  • RN Relay Node
  • cell ID independent cell identifier
  • a network side device a user equipment, a method for allocating a PDCCH, and a method for determining a PDCCH are further provided in the embodiment of the present invention.
  • the principles for solving the problem are similar to the system for determining a PDCCH.
  • the implementation of the device and method can be referred to the implementation of the system, and the details are not repeated here.
  • the network side device that allocates the PDCCH in the embodiment of the present invention includes: a notification module 200 and a distribution module 210.
  • the notification module 200 is configured to notify a transmission mode of the PDSCH corresponding to the user equipment
  • the allocating module 210 is configured to allocate a corresponding PDCCH resource to the user equipment according to the transmission mode of the PDSCH corresponding to the user equipment;
  • the PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.
  • the allocation module 210 allocates the CSS and the UESS corresponding to the user equipment to the Legacy PDCCH domain.
  • the channel measurement is based on
  • the allocation module 210 allocates the CSS and the UESS corresponding to the user equipment to the legacy PDCCH domain. Preferably, if the transmission mode of the PDSCH corresponding to the user equipment is based on the CRS for channel measurement, the allocation module 210 allocates the CSS and the UESS corresponding to the user equipment to the legacy PDCCH domain.
  • the user equipment that determines the PDCCH in the embodiment of the present invention includes: a transmission mode determining module 300 and a resource determining module 310.
  • the transmission mode determining module 300 is configured to determine a transmission mode of the corresponding PDSCH that is notified by the network side, and the resource determining module 310 is configured to determine a PDCCH resource according to the corresponding transmission mode of the PDSCH, where the PDCCH resource includes a legacy PDCCH domain and Enhanced PDCCH domain.
  • the resource determining module 310 determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.
  • the resource determining module 310 determines that the corresponding CSS and UESS are in Legacy.
  • the resource determining module 310 determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.
  • the method for allocating a PDCCH in the embodiment of the present invention includes the following steps:
  • Step 401 The network side notifies the transmission mode of the physical downlink shared channel PDSCH corresponding to the user equipment.
  • Step 402 The network side allocates a corresponding PDCCH resource to the user equipment according to the PDSCH transmission mode corresponding to the user equipment.
  • the PDCCH resource includes a Legacy PDCCH domain and an Enhanced PDCCH domain.
  • the network side notifies the transmission mode of the PDSCH corresponding to the user equipment 20 through high layer signaling.
  • the network side allocates corresponding PDCCH resources to the user equipment according to the PDSCH transmission mode corresponding to the user equipment. Several types are listed below.
  • the transmission mode of the PDSCH based on CRS for channel measurement and signal demodulation is transmission mode 1 ⁇ 6, see Table 1.
  • the transmission mode of PDSCH is transmission mode 1 ⁇ 7, see Table 1.
  • Manner 3 If the transmission mode of the PDSCH corresponding to the user equipment is based on the CRS for channel measurement, the network side allocates the CSS and the UESS corresponding to the user equipment to the legacy PDCCH domain.
  • the transmission mode of the PDSCH based on CRS for channel measurement is the transmission mode 1 ⁇ 8, see Table 1.
  • the CSS and the UESS corresponding to the user equipment are allocated to the Enhanced PDCCH domain; and the CSS corresponding to the user equipment is In the Enhanced PDCCH region, the UESS is in the legacy PDCCH domain.
  • Manner 5 If the transmission mode of the PDSCH corresponding to the user equipment is not based on CRS for channel measurement and is not demodulated based on the port 5 or CRS of the UE-RS, the network side allocates the CSS corresponding to the user equipment 20 to the Legacy. In the PDCCH domain, the UESS is allocated to the Enhanced PDCCH domain.
  • the CSS and the UESS corresponding to the user equipment are allocated to the Enhanced PDCCH domain; and the CSS corresponding to the user equipment is In the Enhanced PDCCH region, the UESS is in the legacy PDCCH domain.
  • the CSS and the UESS corresponding to the user equipment are allocated to the Enhanced PDCCH domain; and the CSS corresponding to the user equipment is In the Enhanced PDCCH region, the UESS is in the legacy PDCCH domain.
  • the allocation may be performed in any of the above manners; and the foregoing may be performed in multiple ways without conflict.
  • the method for determining a PDCCH in the embodiment of the present invention includes the following steps:
  • Step 501 The user equipment determines a transmission mode of the corresponding PDSCH that is notified by the network side.
  • Step 502 The user equipment determines, according to the transmission mode of the corresponding PDSCH, the PDCCH resource, where the PDCCH resource includes a legacy PDCCH region and an enhanced PDCCH region.
  • step 502 the user equipment determines that the corresponding CSS and UESS are in the Legacy PDCCH domain.
  • the user equipment determines that the corresponding CSS and UESS are in the Legacy PDCCH domain. If the transmission mode of the corresponding PDSCH is based on the CRS for channel measurement, in step 502, the user equipment determines that the corresponding CSS and UESS are in the legacy PDCCH domain.
  • a process may be synthesized to form another method for determining a PDCCH, that is, step 401 and step 402 are performed first, and then step 501 and step 502 are performed; or step 401 and step 501 are performed first, and then step 402 is performed. And step 502.
  • Example 1 On the transmitting end, if the transmission mode of the user equipment is based on CRS for channel measurement and signal demodulation, the transmitting end allocates the CSS and UESS corresponding to the user equipment in the legacy PDCCH domain, otherwise the transmitting end will use the user equipment.
  • the corresponding CSS is allocated in the Legacy PDCCH domain
  • the UESS is allocated in the Enhanced PDCCH domain, or the allocation of CSS and UESS of such users is implemented according to other rules.
  • the transmission mode of the user equipment is one of modes 1 to 6 (mode 1 to 6 based on CRS measurement and demodulation, see Table 1), and the CSS and UESS corresponding to the user are allocated.
  • Legacy PDCCH domain In the LTE-A system, the transmission mode of the user equipment is one of modes 1 to 6 (mode 1 to 6 based on CRS measurement and demodulation, see Table 1), and the CSS and UESS corresponding to the user are allocated.
  • Legacy PDCCH domain In the LTE-A system, the transmission mode of the user equipment is one
  • Example 2 At the transmitting end, if the transmission mode of the user equipment is based on CRS for channel measurement, the transmitting end allocates the CSS and UESS corresponding to the user equipment in the legacy PDCCH domain, otherwise the transmitting end allocates the CSS corresponding to the user equipment.
  • the UESS In the Legacy PDCCH domain, the UESS is allocated in the Enhanced PDCCH field, or the allocation of CSS and UESS of such users is implemented according to other rules.
  • the transmission mode of the user equipment is one of modes 1 to 8 (mode 1 to 8 is based on CRS measurement, see Table 1), and the CSS and UESS corresponding to the user equipment are allocated in the legacy PDCCH. area.
  • Embodiment 3 On the transmitting end, if the transmission mode of the user equipment is channel measurement based on CRS and demodulated based on UE-RS port 5 or CRS, the transmitting end allocates the CSS and UESS corresponding to the user equipment to Legacy.
  • the PDCCH field otherwise, the transmitting end allocates the CSS corresponding to the user equipment in the legacy PDCCH domain, the UESS allocates in the Enhanced PDCCH domain, or implements the allocation of CSS and UESS of such users according to other rules.
  • the transmission mode of the user equipment is mode 1 to 7 (modes 1 to 7 are channel measurement based on CRS and demodulated based on UE-RS port 5 or CRS, see Table 1).
  • the CSS and UESS corresponding to the user equipment are allocated in the Legacy PDCCH domain.
  • 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 present invention is directed to a flowchart of a method, apparatus (system), and computer program product according to an embodiment of the present invention. And / or block diagram to describe. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • 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 PDCCH resources can be allocated under the PDCCH enhancement scheme, so that the effective transmission and reception of the PDCCH can be ensured;

Abstract

Des modes de réalisation de la présente demande concernent le domaine technique des communications sans fil, et portent spécifiquement sur un procédé, un système et un dispositif d'attribution et de détermination d'un canal de commande de liaison descendante physique (PDCCH), applicables dans l'attribution de ressources PDCCH dans un système à PDCCH amélioré. Selon les modes de réalisation de la présente invention, le procédé d'attribution du PDCCH comprend les opérations suivantes : un côté réseau notifie à un équipement utilisateur un mode d'émission d'un canal partagé de liaison descendante physique (PDSCH) qui lui correspond ; le côté réseau attribue des ressources PDCCH correspondantes à l'équipement utilisateur sur la base du mode d'émission du PDSCH correspondant à l'équipement utilisateur, les ressources PDCCH comprenant un domaine de PDCCH patrimonial et un domaine de PDCCH amélioré. Etant donné que l'attribution des ressources PDCCH est permise dans le système à PDCCH amélioré, une émission et une réception efficace du PDCCH sont ainsi assurées.
PCT/CN2012/073456 2011-06-17 2012-04-01 Procédé, système et dispositif d'attribution et de détermination de pdcch WO2012171395A1 (fr)

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