WO2013159676A1 - 一种e-pdcch传输及盲检的方法及装置 - Google Patents

一种e-pdcch传输及盲检的方法及装置 Download PDF

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Publication number
WO2013159676A1
WO2013159676A1 PCT/CN2013/074417 CN2013074417W WO2013159676A1 WO 2013159676 A1 WO2013159676 A1 WO 2013159676A1 CN 2013074417 W CN2013074417 W CN 2013074417W WO 2013159676 A1 WO2013159676 A1 WO 2013159676A1
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Prior art keywords
aggregation level
subframe
pdcch
network side
subframes
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PCT/CN2013/074417
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English (en)
French (fr)
Inventor
赵锐
潘学明
拉·盖施
张然然
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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
Priority to JP2015507351A priority Critical patent/JP6105716B2/ja
Priority to US14/396,637 priority patent/US9661622B2/en
Priority to KR1020147032247A priority patent/KR101663149B1/ko
Priority to EP13782398.5A priority patent/EP2843986B1/en
Publication of WO2013159676A1 publication Critical patent/WO2013159676A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603Arrangements for wireless physical layer control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2612Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058Allocation criteria
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038Blind format detection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072Error control for data other than payload data, e.g. control data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and an apparatus for E-PDCCH transmission and blind detection.
  • LTE Long Term Evolution
  • a PDCCH Physical Downlink Control Channel Physical Downlink Control Channel
  • PDCCH Physical Downlink Control Channel
  • the first N OFDM symbols are referred to herein as "traditional PDCCH regions", also referred to as control regions.
  • the control region for transmitting the PDCCH in the LTE Rel-8/9/10 system is composed of a logically divided CCE (Control Channel Element), wherein one CCE is composed of 9 REGs (Resource Element Groups).
  • the composition, CCE to REG mapping, is mapped to the full bandwidth range using the REG interleaving method.
  • An REG is composed of four REs (Resource Element) that are adjacent in the frequency domain and adjacent to each other in the frequency domain.
  • the REs constituting the REG do not include REs for transmitting common reference symbols, and the specific REGs are defined as follows.
  • Figure 2 shows. The definition of specific REG and the mapping method of CCE and REG are described in the standard 36.211.
  • the DCI (downlink control information) is also transmitted in units of CCEs.
  • One DCI for one UE can be transmitted in M logically consecutive CCEs.
  • the possible values of M in the LTE system are 1, 2, 4, 8 is called CCE aggregation level.
  • the Aggregation LeveL UE performs PDCCH blind detection in the control region to search whether there is PDCCH signaling for the UE.
  • the blind detection uses the RNTK Radio Network Temporary Identity of the UE.
  • the wireless network temporary identifier attempts to decode different DCI formats and CCE aggregation levels, and if the decoding is correct, receives DCI for the UE.
  • 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.
  • the PDCCH for the Relay (Relay) system is defined in the LTE Rel-10 system, which is denoted as R-PDCCH, which occupies the PDSCH region, and the R-PDCCH and PDSCH resource structure diagrams are specifically shown in FIG. 3, where R- The PDCCH is used by the base station to transmit control signaling to the Relay, and the Legacy PDCCH, that is, the legacy PDCCH region defined in LTE Rel-8/9/10, is also called a control region.
  • the resources occupied by the R-PDCCH are configured through high layer signaling.
  • the PRB pair (physical resource block pair) resources that are occupied may be continuous or non-contiguous.
  • PRB which is a resource unit consisting of one slot (time slot) in the time domain and one RB (Radio Bearer) in the frequency domain; one of the slots is a continuous 7 OFDM symbols in the case of normal CP (common cyclic prefix) Or, in the case of extended CP (extended cyclic prefix), consecutive 6 OFDM symbols.
  • normal CP common cyclic prefix
  • extended CP extended cyclic prefix
  • the PRB pair is a resource unit consisting of two slots in one subframe in the time domain and one RB in the frequency domain.
  • the R-PDCCH does not include a common search space. Only the relay-specific R-PDCCH search space. Its DL grant (downlink scheduling) signaling and UL grant (uplink scheduling signaling) are transmitted by means of TDM (Time Division Multiplex and Multiplexer):
  • the DL grant is transmitted in the first time slot.
  • the relay detects DCI format 1 A and a DCI format associated with the downlink transmission mode.
  • the UL grant is transmitted in the second time slot.
  • the relay detects DCI format 0 and a DCI format associated with the upstream transmission mode.
  • R-PDCCH two transmission modes are defined in the transmission of R-PDCCH, which are interleaved mode and non-interleaved mode:
  • the unit of the aggregation level is PRB, where the resources occupied by the candidate channels in the search space are
  • the order of PRBs has a fixed mapping relationship.
  • FIG. 4 shows a CSI-RS (Channel State Information Reference Signal) configuration diagram in an LTE Rel-10 system, where the RE position marked with a number may be configured with CSI.
  • the transmission mode of the CSI-RS is divided into a multiplexing mode of 2 ports, a multiplexing mode of 4 ports, and a multiplexing mode of 8 ports.
  • Each terminal separately configures the number of ports and resource locations of the CSI-RS, which may result in different resource locations occupied by different terminals.
  • each terminal can also be configured with ZeroPowerCSI-RS (ie, zero-power CSI-RS), and its configuration relationship is performed by referring to the multiplexing mode under the 4-port, and no signal is sent on the resource location corresponding to the ZeroPowerCSI-RS, for example, if some When the 4-port CSI-RS pattern is configured as a ZeroPower CSI-RS, the terminal considers that the RE location does not transmit PDSCH (Physical Downlink Shared Channel) data. It can be seen from FIG. 4 that the resources that can be used to carry the PDCCH transmission are different in a PRB pair according to the configuration of the CSI-RS/Zero Power CSI-RS.
  • PDSCH Physical Downlink Shared Channel
  • the E-PDCCH has two modes of frequency domain continuous transmission (localized) and frequency domain discontinuous transmission (distributed), which are applied to different scenarios.
  • the localized transmission mode is used for the base station to obtain the more accurate channel information that the terminal feedbacks, and the neighboring cell interference is not very severe with the subframe change.
  • the base station selects according to the CSI (Channel State Information) fed back by the terminal.
  • the continuous frequency resource with better shield capacity transmits the E-PDCCH to the terminal, and performs precoding/beamforming processing to improve transmission performance.
  • the E-PDCCH needs to be transmitted in the distributed transmission mode, that is, the frequency resource is discontinuously transmitted, thereby obtaining the frequency.
  • Diversity gain, Figure 5 and Figure 6 show examples of E-PDCCH transmission in localized transmission mode and distributed transmission mode. In the example, one DCI transmission occupies resources in four PRB pairs.
  • E-PDCCH resources There are several possible definitions of E-PDCCH resources:
  • a PRB pair is divided into fixed N E-REG/E-CCEs, and the size of E-REG/E-CCE may be different.
  • a PRB pair is divided into an integer number of E-REG/E-CCEs according to the configuration of the system (eg, legacy PDCCH region, CRS, DMRS, CSI-RS/Zero Power CSI-RS, etc.), where E-REG/ The number of E-CCEs is determined according to the configuration of the system and can be different in each subframe.
  • the RE resources available in a PRB pair are divided into an integer number of E-REGs.
  • Each E-REG contains the same number of REs, and a fixed number of E-REGs form an E-CCE.
  • the E-PDCCH of the same aggregation level has different demodulation performance in different subframes, for example.
  • a PRBpair is fixed to include 4 E-CCEs, if there are more REs for the bearer system reference signal transmission in the subframe 1, the number of available REs carrying the PDCCH transmission is less. Otherwise, if the subframe 2 carries the system reference signal If the number of available REs for the E-PDCCH transmission is large, the two subframes are configured separately if the two subframes have the same fixed N E-REGs for the E-PDCCH transmission configuration.
  • Embodiments of the present invention provide a method and apparatus for E-PDCCH transmission and blind detection, which are used to improve E-PDCHH performance.
  • a method for E-PDCCH transmission including: Determining, according to the network side configuration information, an E-PDCCH transmission mode used by the time-frequency resource occupied by the E-PDCCH transmission in each subframe;
  • the corresponding time-frequency resource E-PDCCH transmission mode is used in each subframe to perform E-PDDCH transmission to the terminal side.
  • a method for blind detection of E-PDCCH including:
  • the E-PDDCH blind detection is performed in each subframe by using the corresponding E-PDCCH transmission mode time-frequency resource.
  • An apparatus for transmitting E-PDCCH includes:
  • a processing unit configured to determine, according to the network side configuration information, time-frequency resources occupied by performing E-PDCCH transmission in each subframe, respectively;
  • the communication unit is configured to perform E-PDDCH transmission to the terminal side by using corresponding time-frequency resources in each subframe according to the determination result.
  • a device for blind detection of E-PDCCH comprising:
  • control unit configured to determine, according to the network side indication, time-frequency resources occupied by performing E-PDCCH blind detection in each subframe, respectively;
  • the blind detection unit is configured to perform E-PDDCH blind detection by using corresponding time-frequency resources in each subframe according to the determination result.
  • FIG. 1 is a schematic diagram showing a multiplexing relationship between a control area and a data area in a downlink subframe in the prior art
  • FIG. 2 is a schematic diagram of a REG in the prior art
  • FIG. 3 is a schematic diagram of R-PDCCH and PDSCH resources in the prior art
  • FIG. 4 is a schematic diagram of a CSI-RS configuration in the prior art
  • FIG. 5 is a schematic diagram of continuous E-PDCCH transmission in a frequency domain in the prior art
  • FIG. 6 is a schematic diagram of transmission of E-PDCCH in a frequency domain discontinuous state in the prior art
  • FIG. 7 is a flowchart of performing E-PDCCH transmission by a base station according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of partitioning candidate E-PDCCHs according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of performing a blind check of an E-PDCCH by a terminal according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of an E-REG configuration according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a configuration of a RE that can be used for carrying E-PDCCH transmission in a PRB pari according to an embodiment of the present invention
  • FIG. 12 is a schematic structural diagram of a function of a base station according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a terminal function according to an embodiment of the present invention.
  • a fixed K resource does not overlap E-REG
  • the E-CCE is composed of one or more E-REGs
  • the terminal is configured in a PRB pair.
  • the resource granularity of the single aggregation level used in the E-PDCCH detection according to a predefined principle eg, E-CCE
  • the number of E-REGs included in the ), and/or the set of minimum aggregation levels and aggregation levels for determining the E-PDCCH blind detection may also be referred to as the number of candidate E-PDCCHs per aggregation level).
  • Step 700 The base station separately determines a time frequency occupied by performing E-PDCCH transmission in each subframe according to network side configuration information. Resources.
  • one or a combination of the following two modes may be selected (only for example, and is not limited thereto):
  • the first mode is (hereinafter referred to as mode A): the base station determines the number of E-REGs included in the resource granularity (for example, E-CCE) in a single aggregation level in each subframe according to the network preset configuration information.
  • E-CCE resource granularity
  • the base station can determine how many E-Cs are included in the next E-CCE in a single aggregation level in each sub-frame according to the preset configuration information on the network side. In this way, the number of REs used for carrying the E-PDCCH transmission in each subframe can be kept similar, thereby ensuring the consistency of the E-PDCCH transmission performance of each subframe.
  • the second mode is (hereinafter referred to as mode B):
  • the base station determines the aggregation level set and the minimum aggregation level corresponding to each subframe according to preset configuration information of the network side.
  • each subframe When the mode B is used, a fixed number of E-CCEs and E-REGs are set in each subframe, and the base station can set the aggregation level set corresponding to each subframe according to the preset configuration information of the network side, so that each When E-PDCCH transmission is performed by using a corresponding aggregation level set in one subframe, respectively, each sub-frame may be used for carrying The number of REs transmitted by the E-PDCCH remains approximately, thereby ensuring the consistency of the transmission performance of each subframe E-PDCCH.
  • the two methods will be described in detail separately.
  • Step 710 The base station performs E-PDDCH transmission to the terminal side by using corresponding time-frequency resources in each subframe according to the determination result.
  • the base station will perform E-PDCCH transmission in each subframe by using a corresponding number of E-REGs included in the E-CCE in a single aggregation level.
  • the base station uses B to configure each subframe, the base station will use the corresponding aggregation level set for E-PDCCH transmission in each subframe.
  • the base station sets the number of E-REGs included in the E-CCE in a single aggregation level in each subframe, and sets the aggregation level corresponding to each subframe.
  • the set and the minimum aggregation level so that the number of REs used to carry the E-PDCCH transmission in each subframe can be controlled more precisely.
  • the base station may determine the number of E-REGs included in the E-CCE in a single aggregation level in each sub-frame based on the network-side preset configuration information, specifically (in any case, for example):
  • the base station determines, according to the network side preset configuration information, the number of REs transmitted by the bearer reference signals in any one of the foregoing subframes, such as legacy PDCCH region, CRS, DMRS, CSI-RS/Zero Power CSI-RS, and is recorded as N. .
  • the base station determines, based on N, the number of REs that can be used to carry the E-PDCCH transmission in one E-REG in any one of the above subframes, denoted as R.
  • the base station compares R with the set threshold, and determines the number of E-REGs included in the E-CCE at a single aggregation level in any one of the above subframes according to the comparison result.
  • R ⁇ sets the threshold, then set one E-CCE to include two E-REGs (may also contain more than two REGs, as the case may be); if R> set the threshold , set an E-CCE to include an E-REG. In this way, the E-PDCCH transmission performance of each subframe can be well balanced.
  • the available REs carrying the E-PDCCH transmission are less, for example, an E-REG contains 15 REs, and conversely, if the subframe 2 carries the RE The RE of the system reference signal transmission is less, and the number of available REs carrying the E-PDCCH is more. For example, if an E-REG contains 30 REs, then the two subframes are configured for the E-PDCCH transmission. If the same E-CCE is fixed in an E-CCE, the total number of REs that can be used to carry the E-PDCCH transmission is 30. Similarly, the subframe is set.
  • E-PDCCH Within an E-CCE country containing an E-REG, then it can be used for The total number of REs transmitted by the E-PDCCH is also 30. Obviously, the E-PDCCH transmission performance of subframe 1 and subframe 2 is balanced to some extent.
  • the number of E-REGs included in the resource granularity (ie E-CCE) at a single aggregation level is variable.
  • This method does not change the aggregation level set ⁇ 1,2,4,8 ⁇ defined in the Legacy PDCCH by adjusting the number of E-REGs included in the E-CCE, so that in different system configurations, each subframe is There are approximately similar numbers of REs when using the same aggregation level, so that the E-PDCCH of the same aggregation level has roughly equivalent transmission performance.
  • the base station directly indicates the number of E-REGs included in the E-CCE in a single aggregation level corresponding to each subframe to the terminal, or Notifying the terminal of the network side preset configuration information, the terminal uses the same preset rule to determine the number of E-REGs included in the E-CCE in a single aggregation level in each subframe.
  • the base station may determine the aggregation level set and the minimum aggregation level corresponding to each subframe according to preset configuration information of the network side, and specifically determine (in any one of the subframes as an example):
  • the base station determines, according to the network side preset configuration information, the number of REs transmitted by the bearer reference signals in any one of the foregoing subframes, such as legacy PDCCH region, CRS, DMRS, CSI-RS/Zero Power CSI-RS, and is recorded as N. .
  • the base station determines, based on N, the number of REs that can be used to carry the E-PDCCH transmission in one E-REG in any one of the above subframes, denoted as R.
  • the base station compares R with the set threshold, and determines an aggregation level set and a minimum aggregation level corresponding to any one of the subframes according to the comparison result.
  • the aggregation level set corresponding to any one of the above subframes is set to ⁇ 2, 4, 8, 16 ⁇ , and the minimum aggregation level is 2; if 1 > set threshold, Then, the aggregation level corresponding to any one of the foregoing subframes is set to ⁇ 1, 2, 4, 8 ⁇ , and the minimum aggregation level is 2, so that the E-PDCCH transmission performance of each subframe can be well balanced.
  • E-CCE For example, if a fixed E-CCE is set in each subframe and a fixed E-REG is included in an E-CCE, it is assumed that one E-REG in the subframe 1 contains 15 REs, and the subframe If an E-REG contains 2 REs, then the aggregation level set corresponding to subframe 1 is set to ⁇ 2, 4, 8, 16 ⁇ , and the minimum aggregation level is set to 2, then subframe 1 can be used for bearer.
  • the set of REs transmitted by the E-PDCCH is ⁇ 30, 60, 120, 240 ⁇ .
  • the aggregation level set corresponding to the subframe 2 is set to ⁇ 1, 2, 4, 8 ⁇ , and the minimum aggregation level is set to 1, then the sub- The set of REs that can be used to carry the E-PDCCH transmission in the frame 2 is ⁇ 30, 60, 120, 240 ⁇ . Obviously, the E-PDCCH transmission performance of the subframe 1 and the subframe 2 is balanced to some extent.
  • E-CCE resource granularity
  • the number of E-REGs included in the E-CCE is fixed to L. For example: When the reference signal overhead currently configured by the system in the subframe is relatively small, the set of aggregation levels defined in the original legacy PDCCH is still used ⁇ 1, 2, 4, 8 ⁇ ; when the system is currently configured in the subframe When the overhead is large, set the aggregation level to ⁇ 2, 4, 8, 16 ⁇ . This is also equivalent to configuring the candidate E-PDCCH for different aggregation levels.
  • the number of candidate E-PDCCHs configured at aggregation level 1 is usually 0, and the candidate E-PDCCH is added under aggregation level 16, and the candidate E-PDCCH is divided. See Figure 8 for details. In this way, in different system configurations, each subframe has a similar number of REs when using the same aggregation level, so that the E-PDCCH of the same aggregation level has roughly equivalent transmission performance.
  • the base station after performing step 700, notifies the terminal of the aggregation level set and the minimum aggregation level corresponding to each subframe by using the high layer signaling, or notifies the terminal of the configuration information preset by the network side.
  • the terminal uses the same preset rule as the network to determine the aggregation level set and the minimum aggregation level corresponding to each subframe.
  • the specific notification mode used by the base station includes but is not limited to the following three types:
  • the base station notifies the terminal of the minimum aggregation level, and causes the terminal to determine the corresponding aggregation level set according to the obtained minimum aggregation level, for example, notifying the terminal of the minimum aggregation level 1, and letting the terminal infer that the aggregation level set is ⁇ 1, 2, 4,8 ⁇ .
  • the base station notifies the terminal of the aggregation level set, and causes the terminal to determine the corresponding minimum aggregation level according to the obtained aggregation level set, for example, notifying the terminal of the aggregation level set ⁇ 1, 2, 4, 8 ⁇ , so that the terminal infers the minimum.
  • the aggregation level is 1.
  • the base station notifies the terminal of the candidate E-PDDCH channel set, and causes the terminal to infer the aggregation level set and the minimum aggregation level according to the candidate E-PDCCH channel set.
  • the set of candidate E-PDCCHs that the base station configures to the terminal E-PDCCH in the aggregation level set ⁇ 1, 2, 4, 8 ⁇ for blind detection is ⁇ 6, 6, 2, 2 ⁇
  • the minimum aggregation level is 1, and the candidate E-PDCCH set that can be used for blind detection corresponding to the terminal in the aggregation level set ⁇ 1, 2, 4, 8, 16 ⁇ is ⁇ 0, 6, 6, 2 , 2 ⁇
  • the minimum aggregation level of the blind detection is 2, and the aggregation level set of the actual blind detection is ⁇ 2, 4, 8, 16 ⁇ ; then, if the candidate E-PDCCH set notified by the base station is ⁇ 6 , 6, 2, 2 ⁇ , the terminal determines that the corresponding aggregation level set is ⁇ 1, 2, 4, 8 ⁇ , and the minimum aggregation level is 1, if the candidate E-PDCCH set notified by the base station is ⁇ 0, 6, 6 2, 2 ⁇ , the terminal determines that the corresponding
  • the base station may also use the high layer signaling to notify the number of E-REGs included in the E-CCE in a single aggregation level in each subframe.
  • the terminal, and the terminal side configuration information is notified to the terminal side, so that the terminal side determines the aggregation level set and the minimum aggregation level corresponding to each subframe by using the same preset rule as the network side.
  • the overview process of the E-PDCCH blind detection by the terminal according to the time-frequency resources indicated by the base station is as follows:
  • Step 900 The terminal determines, according to the indication of the network side, the time-frequency resources occupied by the E-PDCCH blind detection in each subframe.
  • the terminal when performing step 900, may use one or a combination of the following two modes (only For example, it is not limited to this):
  • Method C The terminal determines, according to the high layer signaling sent by the network side, or based on the obtained network side preset configuration information, the same preset rule as the network side, and determines the resource granularity of each aggregation level in each subframe.
  • the terminal may be based on the network side preset when determining the number of E-REGs included in the resource granularity of a single aggregation level in any one of the sub-frames based on the obtained network-side preset configuration information. Determining, by the configuration information, the number of resource unit REs carrying the reference signal transmission in the any one of the subframes, and determining, according to the number of REs transmitted by the bearer reference signal, an E-PDCCH for carrying in the R-REG in any one of the subframes The number of REs transmitted, and the number of REs that are transmitted by the bearer E-PDCCH are compared with a set threshold, and the number of E-REGs included in the resource granularity of a single aggregation level in any one of the subframes is determined according to the comparison result. .
  • the number of E-REGs included in the resource granularity (ie E-CCE) at a single aggregation level is variable.
  • This method does not change the aggregation level set ⁇ 1,2,4,8 ⁇ defined in the Legacy PDCCH by adjusting the number of E-REGs included in the E-CCE, so that in different system configurations, each subframe is There are approximately similar numbers of REs when using the same aggregation level, so that the E-PDCCH of the same aggregation level has roughly equivalent transmission performance.
  • Mode D The terminal determines the aggregation level set and the minimum aggregation corresponding to each subframe according to the high-level signaling sent by the network side, or based on the obtained network-side preset configuration information, using the same preset rule as the network side. grade.
  • the terminal may determine the aggregation level set and the minimum aggregation level corresponding to any one of the subframes based on the obtained network-side preset configuration information, and may determine the network-side preset configuration information based on the obtained network-side preset configuration information.
  • the number of resource units RE that carry the reference signal transmission in any one of the subframes and determines the number of REs used to carry the PDCCH transmission in one R-REG in any one of the foregoing one subframes, based on the number of REs transmitted by the bearer reference signal, and
  • the number of REs carrying the PDCCH transmission is compared with a set threshold, and the aggregation level set and the minimum aggregation level corresponding to the any one subframe are determined according to the comparison result.
  • the terminal determines the aggregation level set and the minimum aggregation level corresponding to any one subframe according to the high layer signaling sent by the network side, and may be used in the following three modes:
  • the terminal obtains a minimum aggregation level corresponding to any one of the foregoing subframes according to the high layer signaling sent by the network side, and determines a corresponding aggregation level set according to the minimum aggregation level; or
  • the terminal obtains an aggregation level set corresponding to any one of the foregoing subframes according to the high layer signaling sent by the network side, and determines a corresponding minimum aggregation level according to the aggregation level set; or
  • the terminal obtains the E-PDDCH channel set corresponding to any one of the foregoing subframes according to the high layer signaling sent by the network side, and determines a corresponding aggregation level set and a minimum aggregation level according to the candidate E-PDCCH channel set.
  • E-CCE resource granularity
  • the terminal can obtain the required information in the corresponding combination mode C and mode D, that is, the terminal can obtain the high layer signaling sent by the network side.
  • Step 910 The terminal performs E-PDDCH blind detection by using corresponding time-frequency resources in each subframe according to the determination result.
  • the terminal will perform E-PDCCH blind detection in each subframe according to the corresponding number of E-REGs included in the E-CCE in the corresponding single aggregation level.
  • the terminal will perform E-PDCCH blind detection in each subframe according to the corresponding aggregation level set and the minimum aggregation level.
  • the terminal combines the number of E-REGs included in the E-CCE in a single aggregation level in each subframe, and the aggregation level set and minimum aggregation corresponding to each subframe. Level, E-PDCCH blind detection, so that better E-PDCCH performance can be obtained.
  • DwPTS downlink pilot time slots
  • DwPTS downlink pilot time slots
  • the base station may further increase the number of E-REGs included in the E-CCE in a single aggregation level in the DwPTS, or further the aggregation level of the DwPTS; or , can also be limited to this DwPTS configuration, does not support E-PDCCH transmission.
  • step 900-step 910 The specific implementation manner of the terminal in the foregoing step 900-step 910 is the same as that of the base station. For details, refer to related descriptions on the base station side, and details are not described herein.
  • the number of E-REGs included in one E-CCE may be 1. If the system configuration 2 is used, one E-CCE includes E. The number of -REGs can be 2.
  • an E-CCE is composed of one E-REG, and if the system configuration 1 is used, the size of one E-CCE is approximately 30 REs, and the configuration is used for E-
  • the aggregation level set of the PDCCH blind detection may be the same as the legacy PDCCH, which is ⁇ 1, 2, 4, 8 ⁇ , and the minimum aggregation level is 1; if the above system configuration 2 is used, the size of one E-CCE is approximately With 19 REs, the minimum aggregation level configured for E-PDCCH blind detection is 2, and the corresponding aggregation level set may be ⁇ 2, 4, 8, 16 ⁇ .
  • the base station may also indicate an aggregation level set for the E-PDCCH blind detection and a minimum aggregation level by configuring a candidate E-PDCCH set under each aggregation level.
  • An E-CCE consists of one E-REG as described above. Then, if the above system configuration 1 is used, the base station configures the candidate for blind detection under the aggregation level set ⁇ 1, 2, 4, 8 ⁇ for the terminal.
  • the E-PDCCH set is ⁇ 6, 6, 2, 2 ⁇ , and the minimum aggregation level of the blind detection is 1, and the aggregate level set used by the terminal for the E-PDCCH blind check is ⁇ 1, 2, 4, 8 If the size of an E-CCE is approximately 19 REs, the base station configures the candidate E- for blind detection under the aggregation level set ⁇ 1, 2, 4, 8 ⁇ for the terminal.
  • the PDCCH set is ⁇ 0, 8, 4, 4 ⁇ .
  • the minimum aggregation level actually used for blind detection is 2, and the aggregation level set actually used for blind detection is ⁇ 2, 4, 8 ⁇ , or
  • the base station may also configure the candidate E-PDCCH set for blind detection under the aggregation level set ⁇ 1, 2, 4, 8, 16 ⁇ as ⁇ 0, 6, 6, 2, 2 ⁇ for the terminal, and it can be seen that the actual The minimum aggregation level used for blind detection is 2, and the aggregation level set actually used for blind detection is ⁇ 2, 4, 8, 16 ⁇ .
  • the base station includes a processing unit 120 and a communication unit 121, where
  • the processing unit 120 is configured to determine, according to the network side configuration information, time-frequency resources occupied by performing E-PDCCH transmission in each subframe, respectively.
  • a communication unit configured to perform corresponding time-frequency resources in each subframe to the terminal side according to the determination result
  • the terminal includes a control unit 130 and a blind detection unit 131, wherein
  • the control unit 130 is configured to separately determine, when the E-PDCCH is blindly detected in each subframe, according to the network side indication Time-frequency resources used;
  • the blind detection unit 131 is configured to perform E-PDDCH blind detection by using corresponding time-frequency resources in each subframe according to the determination result.
  • a method for configuring resources for transmitting E-PDCCH according to a system configuration where the network side allocates corresponding E-PDCCH transmission resources for each subframe allocation, where the terminal is E-PDCCH blind detection is performed in different manners in each frame, so that E-PDCCH transmission can achieve better link adaptation, thereby ensuring equalization of E-PDCCH transmission in each subframe, thereby The E-PDCCH blind detection effect of the terminal is improved, and the E-PDCCH demodulation performance is improved.
  • 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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Abstract

本发明涉及通信领域,提供一种E-PDCCH传输及盲检的方法及装置,该方法为:网络侧针对每一个子帧分配进行相应的E-PDCCH传输资源配置,终端在每一个帧中分别采用不同的方式进行E-PDCCH盲检,这样,可以令E-PDCCH传输实现更好的链路自适应,从而保证了各个子帧中E-PDCCH传输的均衡性,从而提高了终端的E-PDCCH盲检效果,进而提升了E-PDCCH解调性能。

Description

一种 E-PDCCH传输及盲检的方法及装置 本申请要求在 2012年 04月 23日提交中国专利局、 申请号为 201210120735.9、发明名称为
"一种 E-PDCCH传输及盲检的方法及装置"的中国专利申请的优先权, 其全部内容通过引用结 合在本申请中。 技术领域 本发明涉及通信领域, 特别涉及一种 E-PDCCH传输及盲检的方法及装置。 背景技术 在 LTE ( Long Term Evolution,长期演进)Rel-8/9/10系统中, PDCCH Physical Downlink Control Channel,物理下行控制信道)在每个无线子帧中进行发送,参阅图 1所示, PDCCH 通常占用一个子帧的前 N个 OFDM ( Orthogonal Frequency Division Multiplexing, 正交频 分复用)符号传输,其中 N可能的取值为 1,2,3,4,而 N=4仅允许出现在系统带宽为 1.4MHz 的系统中, 这里称前 N个 OFDM符号为 "传统的 PDCCH区域", 也称为控制区域。
LTE Rel-8/9/lO系统中传输 PDCCH的控制区域是由逻辑划分的 CCE ( Control Channel Element,控制信道单元)构成的,其中,一个 CCE是由 9个 REG( Resource Element Group, 资源单元组)组成, CCE到 REG的映射釆用基于 REG交织的方法映射到全带宽范围内。 一个 REG是由时域上相同, 频域上相邻的 4个 RE ( Resource Element, 资源单元 )组成, 其中, 组成 REG的 RE不包括用于传输公共参考符号的 RE, 具体的 REG的定义如图 2所 示。 具体的 REG的定义以及 CCE与 REG的映射方法参见标准 36.211中的描述,
DCI ( Downlink Control Information, 下行控制信息)的传输也 ^&于 CCE为单位的, 针对一个 UE的一个 DCI可以在 M个逻辑上连续的 CCE中进行发送,在 LTE系统中 M的 可能取值为 1,2,4,8 ,称为 CCE聚合等级( Aggregation LeveL UE在控制区域中进行 PDCCH 盲检,搜索是否存在针对其发送的 PDCCH信令,盲检即使用该 UE的 RNTK Radio Network Temporary Identity,无线网络临时标识)对不同的 DCI格式以及 CCE聚合等级进行解码尝 试,如果解码正确,则接收到针对该 UE的 DCI。LTE UE在非 DRX( Discontinuous Reception, 非连续传输)状态中的每一个下行子帧都需要对控制区域进行盲检, 搜索 PDCCH。
在 LTE Rel-10系统中定义了用于 Relay (中继) 系统的 PDCCH, 记为 R-PDCCH, 其 占用 PDSCH区域, R-PDCCH和 PDSCH资源结构图具体参阅图 3所示, 其中, R-PDCCH 用于基站向 Relay传输控制信令, Legacy PDCCH,即 LTE Rel-8/9/10中定义的传统 PDCCH 区域, 也称控制区域。 R-PDCCH占用的资源通过高层信令配置。 其占用的 PRB pair ( physical resource block pair , 频率资源块对) 资源可以是连续的也可以是非连续的。
PRB, 是由时域上一个 slot (时隙), 频域上一个 RB ( Radio Bearer, 无线 载)构成 的资源单位; 其中一个 slot为 normal CP (普通循环前缀)情况下连续的 7个 OFDM符号, 或者, 为 extended CP (扩展循环前缀)情况下连续的 6个 OFDM符号。 以 normal CP为 例, 一个 RB由频域上连续的 12个子载波构成。 相应的, PRB pair, 由时域上一个子帧内 的两个 slot, 频域上一个 RB构成的资源单位, 在 R-PDCCH的搜索空间的相关定义中, R-PDCCH不包括公共搜索空间, 只有 relay专用的 R-PDCCH搜索空间。 其 DL grant (下 行调度)信令和 UL grant (上行调度信令 ) 通过 TDM ( Time Division Multiplex and Multiplexer, 时分复用 ) 的方式进行传输:
DL grant在第一个时隙内传输, 在第一个时隙内, relay检测 DCI format 1 A和一个与 下行传输模式相关的 DCI format
UL grant在第二个时隙内传输。 在第二个时隙内, relay检测 DCI format 0和一个与上 行传输模式相关的 DCI format。
同时, 在 R-PDCCH的传输中定义了两种传输方式, 分别是交织的模式和非交织的模 式:
交织的模式, 其中沿用 LTE Rel-8/9/lO系统中的 PDCCH的定义, 聚合等级以及 CCE 为单位, 其中每个 CCE由 9个 REG组成, 其中 CCE和 REG之间的映射沿用 PDCCH中 定义的交织的方式;
非交织的方式, 其聚合等级的单位是 PRB, 其中搜索空间中的候选信道占用的资源与
PRB的顺序有着固定的映射关系。
参阅图 4所示, 图 4展示了 LTE Rel-10系统中的 CSI-RS ( Channel State Information reference signal, 信道状态信息测量参考信号)配置图, 其中标注有数字的 RE位置为系统 可能配置有 CSI-RS传输的资源位置, CSI-RS的传输模式分为 2端口下的复用模式、 4端 口下复用模式和 8端口下的复用方式。 每个终端均单独配置 CSI-RS的端口数以及资源位 置, 这样有可能导致不同的终端占用的资源位置不同。 而且每个终端还可以配置 ZeroPowerCSI-RS (即零功率 CSI-RS ), 其配置关系参照 4 端口下的复用模式进行, ZeroPowerCSI-RS对应的资源位置上不发送任何信号,如,若某个 4端口 CSI-RS图样被配 置为 ZeroPower CSI-RS, 则表示终端认为该 RE位置不发送 PDSCH ( Physical Downlink Shared Channel )数据。由图 4可以看出,在一个 PRB pair内根据 CSI-RS/Zero Power CSI-RS 的配置不同, 可用于承载 PDCCH传输的资源大小也不同。
在 LTE Rel-11的 E-PDCCH (增强 PDCCH )讨论中已确定 E-PDCCH要频域连续传输 ( localized )和频域不连续传输(distributed )两种模式, 应用于不同的场景。 通常情况下, localized传输模式多用于基站能够获得终端反馈的较为精确的信道信息, 且邻小区千扰随 子帧变化不是非常剧烈的场景, 此时基站根据终端反馈的 CSI ( Channel State Information; 信道状态信息)选择盾量较好的连续频率资源为该终端传输 E-PDCCH, 并进行预编码 /波 束赋形处理提高传输性能。 在信道信息不能准确获得, 或者邻小区千扰随子帧变化剧烈且 不可预知的情况下, 需要釆用 distributed传输模式传输 E-PDCCH, 即使用频率上不连续的 频率资源进行传输, 从而获得频率分集增益, 图 5和图 6分别给出了 localized传输模式和 distributed传输模式下的 E-PDCCH传输示例,示例中一条 DCI的传输占用了四个 PRB pair 中的资源。
其中有如下几种可能的 E-PDCCH资源的定义:
A、 一个 PRB pair中划分为固定的 N个 E-REG/E-CCE, E-REG/E-CCE的大小有可能 不同。
B、一个 PRB pair中依据系统的配置(如, legacy PDCCH区域、 CRS、 DMRS、 CSI-RS/Zero Power CSI-RS等配置)划分为整数个 E-REG/E-CCE, 其中 E-REG/E-CCE的个数是根据系 统的配置确定的, 在每个子帧中可以不同。
C、 一个 PRB pair中可用的 RE资源划分为整数个 E-REG, 每个 E-REG包含的 RE个 数相同, 固定个数的 E-REG构成一个 E-CCE。
在上述配置前提下, 对于一个 PRB pair中划分为固定 N个 E-REG/E-CCE的情况, 会 导致相同聚合等级的 E-PDCCH在不同的子帧中具有有不同的解调性能, 例如: 当一个 PRBpair中固定包含 4个 E-CCE时, 若子帧 1内承载系统参考信号传输的 RE开销较多, 则承载 PDCCH传输的可用 RE则较少,反之, 若子帧 2内承载系统参考信号传输的 RE开 销较少,则能够承载 E-PDCCH传输的可用 RE则较多,那么,若上述两种子帧针对 E-PDCCH 传输配置有相同的固定 N个 E-REG, 则两个子帧分别配置的 E-CCE包含的 RE数目相差 过于悬殊, 如, 若子帧 1内用于承载 E-PDCCH传输的可用 RE数目为 15 , 子帧 2内用于 承载 E-PDCCH传输的可用 RE数目为 30, 则假设 N = 1 , 那么, 子帧 1 内一个 E-REG内 包含 15个 RE, 子帧 2内一个 E-REG包含 30个 RE, 显然, 这种 E-PDCCH传输模式将会 严重影响 E-PDCCH的性能。 发明内容 本发明实施例提供一种 E-PDCCH传输及盲检的方法及装置, 用以提高 E-PDCHH性 能。
本发明实施例提供的具体技术方案如下:
一种 E-PDCCH传输的方法, 包括: 根据网络侧配置信息分别确定每一个子帧中进行 E-PDCCH传输时所占用的时频资源 釆用的 E-PDCCH传输模式;
根据确定结果分别在每个子帧中釆用相应的时频资源 E-PDCCH传输模式向终端侧进 行 E-PDDCH传输。
—种 E-PDCCH盲检的方法, 包括:
根据网络侧指示分别确定每一个子帧中进行 E-PDCCH盲检时釆用占用的 E-PDCCH 传输模式时频资源;
根据确定结果分别在每个子帧中釆用相应的 E-PDCCH 传输模式时频资源进行 E-PDDCH盲检。
一种 E-PDCCH传输的装置, 包括:
处理单元, 用于根据网络侧配置信息分别确定每一个子帧中进行 E-PDCCH传输时所 占用的时频资源;
通信单元, 用于根据确定结果分别在每个子帧中釆用相应的时频资源向终端侧进行 E-PDDCH传输。
一种 E-PDCCH盲检的装置, 包括:
控制单元, 用于根据网络侧指示分别确定每一个子帧中进行 E-PDCCH盲检时占用的 时频资源;
盲检单元, 用于根据确定结果分别在每个子帧中釆用相应的时频资源进行 E-PDDCH 盲检。
本发明实施例中,提供了一种根据系统配置对 E-PDCCH传输的资源进行配置的方法, 网络侧针对每一个子帧分配进行相应的 E-PDCCH传输资源配置, 终端在每一个帧中分别 釆用不同的方式进行 E-PDCCH盲检, 这样, 可以令 E-PDCCH传输实现更好的链路自适 应, 从而保证了各个子帧中 E-PDCCH传输的均衡性, 从而提高了终端的 E-PDCCH盲检 效果, 进而提升了 E-PDCCH解调性能。 附图说明 图 1为现有技术下一个下行子帧中控制区域与数据区域的复用关系示意图; 图 2为现有技术下 REG示意图;
图 3为现有技术下 R-PDCCH和 PDSCH资源示意图;
图 4为现有技术下 CSI-RS配置示意图;
图 5为现有技术下频域连续的 E-PDCCH传输示意图;
图 6为现有技术下频域不连续的 E-PDCCH传输示意图; 图 7为本发明实施例中基站进行 E-PDCCH传输流程图;
图 8为本发明实施例中候选 E-PDCCH划分示意图;
图 9为本发明实施例中终端进行 E-PDCCH盲检流程图;
图 10为本发明实施例中一种 E-REG配置示意图;
图 11为本发明实施例中 1个 PRB pari中可用于承载 E-PDCCH传输的 RE配置示意图; 图 12为本发明实施例中基站功能结构示意图;
图 13为本发明实施例中终端功能结构示意图。 具体实施方式 为了提高 E-PDCHH性能, 本发明实施例中, 在一个 PRB pair中设置固定的 K个资源 不重叠的 E-REG, E-CCE是由一个或者多个 E-REG组成, 而终端在检测 E-PDCCH时, 根据高层信令指示或 /和基于网络侧通知的预设配置信息按照预定义的原则, 确定 E-PDCCH检测时使用的单个聚合等级的资源粒度 (如, E-CCE )中包含的 E-REG的个数, 和 /或, 确定 E-PDCCH盲检的最小聚合等级以及聚合等级的集合, 也可称为每个聚合等级 下的候选 E-PDCCH的个数)。
下面结合附图对本发明优选的实施方式进行详细说明。
参阅图 7所示, 本发明实施例中, 基站侧进行 E-PDCCH传输的概述流程如下: 步骤 700: 基站根据网络侧配置信息分别确定每一个子帧中进行 E-PDCCH传输时占 用的时频资源。
本发明实施例中, 在执行步骤 700时, 可以选择以下两种方式中的一种或组合(仅为 举例, 并不局限于此):
第一种方式为(以下称为方式 A ):基站根据网络预设配置信息分别确定每一个子帧内 单个聚合等级下资源粒度(如, E-CCE ) 中包含的 E-REG数目。
釆用方式 A时,每一个子帧中设置了固定数目的 E-CCE,基站可以根据网络侧预设配 置信息, 确定每一个子帧内单个聚合等级下一个 E-CCE中包含多少个 E-REG, 这样, 可 以令各子帧内分别用于承载 E-PDCCH传输的 RE 数目保持近似, 从而保证了各子帧 E-PDCCH传输性能的一致性。
第二种方式为(以下称为方式 B ): 基站基于网络侧预设配置信息, 釆用预设规则分别 确定每一个子帧对应的聚合等级集合及最小聚合等级。
釆用方式 B时, 每一个子帧中设置了固定数目的 E-CCE和 E-REG, 基站可以根据网 络侧预设配置信息, 分别设置每一个子帧对应的聚合等级集合, 这样, 在每一个子帧内分 别使用相应聚合等级集合进行 E-PDCCH 传输时, 也可以令各子帧内分别用于承载 E-PDCCH传输的 RE数目保持近似, 从而保证了各子帧 E-PDCCH传输性能的一致性。 后续实施例中, 将对这两种方式分别进行详细说明。
步骤 710: 基站根据确定结果分别在每个子帧中釆用相应的时频资源向终端侧进行 E-PDDCH传输。
具体为:
若基站釆用方式 A配置各个子帧,则基站将分别在每一个子帧中釆用单个聚合等级下 E-CCE中包含的相应数目的 E-REG进行 E-PDCCH传输。
若基站釆用 B配置各个子帧, 则基站将分别在每一个子帧中釆用相应的聚合等级集合 进行 E-PDCCH传输。
当然, 上述方式 A和方式 B也可以同时使用, 即是指, 基站既设置每一个子帧内单个 聚合等级下 E-CCE中包含的 E-REG数目, 又设置每一个子帧对应的聚合等级集合及最小 聚合等级, 这样, 可以更精确地控制各子帧内分别用于承载 E-PDCCH传输的 RE数目。
基于上述实施例, 下面对方式 A和方式 B的具体实施进行详细介绍。
方式 A:
基站可以基于网络侧预设配置信息, 釆用预设规则分别确定每一个子帧内单个聚合等 级下 E-CCE包含的 E-REG数目, 具体为 (以任意一个子帧为例):
首先, 基站基于网络侧预设配置信息, 确定上述任意一个子帧内承载参考信号, 如, legacy PDCCH区域、 CRS、 DMRS、 CSI-RS/Zero Power CSI-RS )传输的 RE数目, 记为 N。
其次,基站基于 N确定上述任意一个子帧内一个 E-REG中能够用于承载 E-PDCCH传 输的 RE数目, 记为 R。
具体为:釆用公式1 =【 /^」计算一个子帧内能够用于承载 E-PDCCH传输的 RE数目, 其中, K为预设的一个 PRB pair中包含的固定 REG数目。
最后, 基站将 R与设定门限值进行比较, 根据比较结果确定上述任意一个子帧内单个 聚合等级下 E-CCE中包含的 E-REG数目。
具体为: 若 R <设定门限值, 则设置一个 E-CCE中包含两个 E-REG (也可以包含两 个以上的 REG, 视具体情况而定); 若 R>设定门限值, 则设置一个 E-CCE 中包含一个 E-REG。 这样, 可以很好的平衡各子帧的 E-PDCCH传输性能。
例如, 若子帧 1 内承载系统参考信号传输的 RE开销较多, 则承载 E-PDCCH传输的 可用 RE则较少, 如, 一个 E-REG内包含有 15个 RE, 反之, 若子帧 2内承载系统参考信 号传输的 RE开销较少, 则承载 E-PDCCH传输的可用 RE则较多, 如, 一个 E-REG内包 含有 30个 RE,那么,假设上述两种子帧针对 E-PDCCH传输配置有相同的固定 1个 E-CCE, 则设置子帧 1 内一个 E-CCE中包含两个 E-REG, 那么其能够用于承载 E-PDCCH传输的 RE总数目为 30, 同理, 设置子帧 2内一个 E-CCE国包含一个 E-REG, 那么其能够用于承 载 E-PDCCH传输的 RE总数目亦为 30, 显然, 子帧 1和子帧 2的 E-PDCCH传输性能得 到了一定程度的均衡。
釆用这种方法, 令单个聚合等级下资源粒度 (即 E-CCE ) 中包含 E-REG的个数是可 变的。 这种方法不会改变 Legacy PDCCH 中定义的聚合等级集合 { 1,2,4,8} , 是通过调整 E-CCE中包含的 E-REG数目, 使得在不同系统配置情况下, 各子帧之间在使用相同聚合 等级时有着大致相似的 RE的个数, 从而使得相同聚合等级的 E-PDCCH有着大致相当的 传输性能。
另一方面, 基站在执行步骤 700之后, 在执行步骤 710之前, 将各个子帧对应的单个 聚合等级下 E-CCE包含的 E-REG数目, 通过高层信令直接指示给终端, 或者, 也可以将 网络侧预设配置信息通知终端, 令终端釆用相同的预设规则分别确定每一个子帧内单个聚 合等级下 E-CCE中包含的 E-REG数目。
方式 B:
基站可以基于网络侧预设配置信息, 釆用预设规则分别确定每一个子帧对应的聚合等 级集合及最小聚合等级, 具体为 (以任意一个子帧为例):
首先, 基站基于网络侧预设配置信息, 确定上述任意一个子帧内承载参考信号, 如, legacy PDCCH区域、 CRS、 DMRS、 CSI-RS/Zero Power CSI-RS )传输的 RE数目, 记为 N。
其次,基站基于 N确定上述任意一个子帧内一个 E-REG中能够用于承载 E-PDCCH传 输的 RE数目, 记为 R。
具体为:釆用公式1 = /^」计算一个子帧内能够用于承载 E-PDCCH传输的 RE数目, 其中, K为预设的一个 PRB pair中包含的固定 REG数目。
最后, 基站将 R与设定门限值进行比较, 根据比较结果确定上述任意一个子帧对应的 聚合等级集合及最小聚合等级。
具体为: 若 R <设定门限值, 则设置上述任意一个子帧对应的聚合等级集合为 {2,4,8, 16} , 最小聚合等级为 2; 若1 >设定门限值, 则设置上述任意一个子帧对应的聚合等 级为 { 1,2,4,8} , 最小聚合等级为 2, 这样, 可以很好的平衡各子帧的 E-PDCCH传输性能。
例如, 若各子帧内分别设置有固定的一个 E-CCE, 且一个 E-CCE 内包含有固定的一 个 E-REG, 则假设子帧 1 内一个 E-REG包含 15个 RE, 而子帧 2内一个 E-REG包含 30 个 RE, 那么, 将子帧 1对应的聚合等级集合设置为 { 2、 4、 8、 16 }, 最小聚合等级设置 为 2, 则子帧 1中能够用于承载 E-PDCCH传输的 RE数目集合为 {30,60, 120,240} , 同理, 将子帧 2对应的聚合等级集合设置为 { 1、 2、 4、 8 }, 最小聚合等级设置为 1 , 则子帧 2内 能够用于承载 E-PDCCH传输的 RE数目集合为 {30,60, 120,240} , 显然, 子帧 1和子帧 2的 E-PDCCH传输性能得到了一定程度的均衡。
釆用这种方法, 单个聚合等级资源粒度 ( E-CCE ) 中包含的 E-REG的数目是不变的, 其中 E-CCE包含的 E- REG的个数固定为 L个。 例如: 当子帧中系统当前配置的参考信号 开销比较小的时候,仍然沿用原有的 legacy PDCCH中定义的聚合等级的集合 { 1,2,4,8}; 当 子帧中系统当前配置的开销比较大的时候, 将聚合等级的集合设置为 {2,4,8,16}。 这也相当 于为不同的聚合等级配置候选 E-PDCCH, 在聚合等级 1下配置的候选 E-PDCCH数目通 常为 0, 在聚合等级 16下增加了候选 E-PDCCH的, 关于候选 E-PDCCH划分方式具体参 阅图 8所示。 这样, 使得在不同系统配置情况下, 各子帧之间在使用相同聚合等级时有着 大致相似的 RE的个数, 从而使得相同聚合等级的 E-PDCCH有着大致相当的传输性能。
另一方面, 基站在执行步骤 700之后, 在执行步骤 710之前, 釆用高层信令将各个子 帧对应的聚合等级集合及最小聚合等级通知终端, 或者, 将网络侧预设的配置信息通知终 端, 令终端釆用与网络则相同的预设规则确定各个子帧对应的聚合等级集合及最小聚合等 级; 其中, 针对前一种情况, 基站釆用的具体通知方式包含但不限于以下三种:
1、 基站将最小聚合等级通知终端, 令终端根据获得的最小聚合等级确定出相应的聚 合等级集合,如,向终端通知最小聚合等级 1 ,令终端自行推断出聚合等级集合为 { 1,2,4,8}。
2、 基站将聚合等级集合通知终端, 令终端根据获得的聚合等级集合确定出相应的最 小聚合等级,如,向终端通知聚合等级集合 { 1,2,4,8} ,令终端自行推断出最小聚合等级为 1。
3、 基站将候选 E-PDDCH信道集合通知终端, 令终端根据候选 E-PDCCH信道集合推 断出聚合等级集合及最小聚合等级。
如, 通常情况下, 基站配置给终端 E-PDCCH在聚合等级集合 { 1,2,4,8}中对应的可用 于盲检的候选 E-PDCCH 集合为 {6,6,2,2} , 可以看出其最小聚合等级为 1 , 配置给终端在 聚合等级集合 { 1,2,4,8,16}中对应的可用于盲检的候选 E-PDCCH集合为 {0,6,6,2,2} ,可以看 出其盲检的最小的聚合等级为 2, 实际盲检的聚合等级集合为 {2,4,8,16}; 那么, 若基站通 知的候选 E-PDCCH集合为 {6,6,2,2} , 则终端确定相应的聚合等级集合为 { 1,2,4,8} , 最小聚 合等级为 1 , 若基站通知的候选 E-PDCCH集合为 {0,6,6,2,2} , 则终端确定相应的聚合等级 集合为 {2,4,8,16} , 最小聚合等级为 2。
另一方面, 本发明实施例中, 若基站同时使用了方式 A和方式 B, 则基站还可以釆用 高层信令将每一个子帧内单个聚合等级下 E-CCE包含的 E-REG数目通知终端, 以及将网 络侧预设配置信息通知终端侧, 令终端侧釆用与网络侧相同的预设规则确定每一个子帧对 应的聚合等级集合以及最小聚合等级。
与上述实施例相应的, 参阅图 9所示, 本发明实施例中, 终端根据基站指示的时频资 源, 进行 E-PDCCH盲检的概述流程如下:
步骤 900: 终端根据网络侧指示分别确定每一个子帧中进行 E-PDCCH盲检时占用的 时频资源。
本发明实施例中,在执行步骤 900时,终端可以釆用以下两种方式中的一种或组合(仅 为举例, 并不局限于此):
方式 C: 终端根据网络侧发送的高层信令, 或者, 基于获得的网络侧预设配置信息, 釆用与网络侧相同的预设规则, 分别确定每一个子帧中单个聚合等级下资源粒度包含的
E-REG数目。
其中, 终端基于获得的网络侧预设配置信息, 釆用与网络侧相同的预设规则确定任意 一个子帧内单个聚合等级下资源粒度中包含的 E-REG数目时,可以基于网络侧预设配置信 息确定所述任意一个子帧内承载参考信号传输的资源单元 RE数目, 并基于所述承载参考 信号传输的 RE数目确定所述任意一个子帧内一个 R-REG中用于承载 E-PDCCH传输的 RE 数目, 以及将所述承载 E-PDCCH传输的 RE数目与设定门限值进行比较, 根据比较结果 确定所述任意一个子帧内单个聚合等级下资源粒度中包含的 E-REG数目。
釆用这种方法, 令单个聚合等级下资源粒度 (即 E-CCE ) 中包含 E-REG的个数是可 变的。 这种方法不会改变 Legacy PDCCH 中定义的聚合等级集合 { 1,2,4,8} , 是通过调整 E-CCE中包含的 E-REG数目, 使得在不同系统配置情况下, 各子帧之间在使用相同聚合 等级时有着大致相似的 RE的个数, 从而使得相同聚合等级的 E-PDCCH有着大致相当的 传输性能。
方式 D: 终端根据网络侧发送的高层信令, 或者, 基于获得的网络侧预设配置信息, 釆用与网络侧相同的预设规则, 分别确定每一个子帧对应的聚合等级集合及最小聚合等 级。
其中, 终端基于获得的网络侧预设配置信息, 釆用与网络侧相同的预设规则确定任意 一个子帧对应的聚合等级集合及最小聚合等级时, 可以基于获得的网络侧预设配置信息确 定所述任意一个子帧内承载参考信号传输的资源单元 RE数目, 并基于所述承载参考信号 传输的 RE数目确定上述任意一个子帧内一个 R-REG中用于承载 PDCCH传输的 RE数目, 以及将所述承载 PDCCH传输的 RE数目与设定门限值进行比较, 根据比较结果确定所述 任意一个子帧对应的聚合等级集合及最小聚合等级。
进一步地, 终端根据网络侧发送的高层信令确定任意一个子帧对应的聚合等级集合及 最小聚合等级, 可以釆用但不限于以下三种方式:
1、 终端根据网络侧发送的高层信令获得上述任意一个子帧对应的最小聚合等级, 并 根据所述最小聚合等级确定出相应的聚合等级集合; 或者,
2、 终端根据网络侧发送的高层信令获得上述任意一个子帧对应的聚合等级集合, 并 根据所述聚合等级集合确定出相应的最小聚合等级; 或者,
3、 终端根据网络侧发送的高层信令获得上述任意一个子帧对应的 E-PDDCH信道集 合, 并根据该候选 E-PDCCH信道集合确定出相应的聚合等级集合及最小聚合等级。
釆用这种方法, 单个聚合等级资源粒度 ( E-CCE ) 中包含的 E-REG的数目是不变的, 其中 E-CCE 包含的 E-REG 的个数固定为 L 个, 相当于为不同的聚合等级配置候选 E-PDCCH, 在聚合等级 1下配置的候选 E-PDCCH数目通常为 0, 在聚合等级 16下增加 了候选 E-PDCCH的, 关于候选 E-PDCCH划分方式具体参阅图 8所示。 这样, 使得在不 同系统配置情况下, 各子帧之间在使用相同聚合等级时有着大致相似的 RE的个数, 从而 使得相同聚合等级的 E-PDCCH有着大致相当的传输性能。
另一方面, 本发明实施例中, 若基站同时使用了方式 A和方式 B, 则终端可以对应的 结合方式 C和方式 D获得所需的信息,即终端可以根据网络侧发送的高层信令获得每一个 子帧内单个聚合等级下 E-CCE包含的 E-REG数目,以及基于获得的网络侧预设配置信息, 釆用与网络侧相同的预设规则确定每一个子帧对应的聚合等级集合以及最小聚合等级。
步骤 910: 终端根据确定结果分别在每个子帧中釆用相应的时频资源进行 E-PDDCH 盲检。
具体为:
若基站釆用方式 A配置各个子帧,则终端将分别在每一个子帧中按照相应的单个聚合 等级下 E-CCE中包含的相应数目的 E-REG进行 E-PDCCH盲检。
若基站釆用 B配置各个子帧, 则终端将分别在每一个子帧中按照相应的聚合等级集合 及最小聚合等级进行 E-PDCCH盲检。
当然, 上述方式 A和方式 B也可以同时使用, 那么, 终端结合每一个子帧内单个聚合 等级下 E-CCE中包含的 E-REG数目,和每一个子帧对应的聚合等级集合及最小聚合等级, 进行 E-PDCCH盲检, 这样, 可以获得更佳的 E-PDCCH性能。
当然, 上述各方法在 MBSFN ( Multimedia Broadcast multicast service Single Frequency
Network, 多媒体广播多播业务单频网络)子帧和 DwPTS (下行导频时隙) 中均可适用, 其中, 对于 DwPTS配置为 0和 5的两种情况, 由于此时 DwPTS只占用 3个 OFDM符号, 因此, 在这种 DwPTS配置下, 若 DwPTS中支持 E-PDCCH传输, 则基站可以进一步提高 DwPTS中单个聚合等级下 E-CCE包含的 E-REG数目,或者,进一步 DwPTS的聚合等级; 或者, 也可以限制在这种 DwPTS配置下, 不支持 E-PDCCH传输。
上述步骤 900 -步骤 910中终端的具体执行方式与基站侧保持一致, 具体参阅基站侧 相关描述, 在此不再赘述。
下面通过几个具体的应用场景, 对上述实施例作出进一步说明。
参阅图 10所示, 假设一个 PRB pair中包含资源不重叠的四个 E-REG, 以及参阅图 11 所示, 支设存在以下两种系统配置:
系统配置 1 :
Normal CP类型, 2 CRS端口 (16个 RE ), 4 DMRS端口 ( 24个 RE ), legacy PDCCH 控制区域占用 1个 OFDM符号(去除 CRS之后占用 8个 RE ),没有配置 CSI-RS/Zero Power CSI-RS端口,那么 1个 PRB pair中可用的 RE个数为 168-( 16+24+8 )=120,那么每个 E-REG 有大致 120/4=30个 RE。 如图 11中子图 A )所示。
系统配置 2:
Normal CP类型, 2 CRS端口 (16个1^ ), 4 DMRS端口 ( 24个 RE ), legacy PDCCH 控制区域占用 2个 OFDM符号 (去除 CRS之后占用 20个 RE ), 8端口的 CSI-RS ( 8个 RE ) 以及所有可能的 Zero Power CSI-RS端口 ( 24个 RE )。 那么 1个 PRB pair中可用的 RE个数为 168- ( 16+24+20 ) -(8+24)=76, 那么每个 E-REG有大致 76/4=19个 RE, 具体如 图 11中子图 B )所示。
在第一种应用场景下, 若釆用上述系统配置 1 , 则 1个 E-CCE包含的 E-REG的个数 可以为 1 , 若釆用上述系统配置 2, 则 1个 E-CCE包含 E-REG的个数可以为 2。
在第二种应用场景下, 一个 E-CCE由上述的一个 E-REG组成, 那么若釆用上述系统 配置 1 , 则 1个 E-CCE的大小大致为 30个 RE, 配置的用于 E-PDCCH盲检的聚合等级集 合可以与 legacy PDCCH的相同, 为 { 1,2,4,8} , 其最小聚合等级为 1 ; 若釆用上述系统配置 2,则 1个 E-CCE的大小大致为 19个 RE,配置的用于 E-PDCCH盲检的最小聚合等级为 2, 相应的聚合等级集合可以为 {2,4,8,16}。
或者, 在上述第二种应用场景下, 基站也可以通过配置每种聚合等级下的候选 E-PDCCH 集合的方法来指示用于 E-PDCCH盲检的聚合等级集合以及最小聚合等级。 例 如: 一个 E-CCE由上述的一个 E-REG组成, 那么, 若釆用上述系统配置 1 , 则基站为终 端配置在聚合等级集合 { 1,2,4,8}下用于盲检的候选 E-PDCCH集合为 {6,6,2,2} ,其盲检的最 小聚合等级为 1 , 则终端实际使用的用于 E-PDCCH盲检的聚合等级集合为 { 1,2,4, 8}; 若 釆用上述系统配置 2, 1个 E-CCE的大小大致为 19个 RE, 则基站为终端配置在聚合等级 集合 { 1,2,4,8}下用于盲检的候选 E-PDCCH 集合为 {0,8,4,4} , 可以看出,其实际用于盲检的 最小聚合等级为 2, 实际用于盲检的聚合等级集合为 {2,4, 8} , 或者, 基站也可以为终端配 置在聚合等级集合 { 1,2,4,8,16}下用于盲检的候选 E-PDCCH 集合为 {0,6,6,2,2} ,可以看出其 实际用于盲检的最小聚合等级为 2, 实际用于盲检的聚合等级集合为 {2,4, 8,16}。
基于上述各实施例,参阅图 12和图 13所示,本发明实施例中,基站包括处理单元 120 和通信单元 121 , 其中,
处理单元 120, 用于根据网络侧配置信息分别确定每一个子帧中进行 E-PDCCH传输 时所占用的时频资源;
通信单元, 用于根据确定结果分别在每个子帧中釆用相应的时频资源向终端侧进行
E-PDDCH传输。
终端包括控制单元 130和盲检单元 131 , 其中,
控制单元 130, 用于根据网络侧指示分别确定每一个子帧中进行 E-PDCCH盲检时占 用的时频资源;
盲检单元 131 , 用于根据确定结果分别在每个子帧中釆用相应的时频资源进行 E-PDDCH盲检。
综上所述, 本发明实施例中, 提供了一种根据系统配置对 E-PDCCH传输的资源进行 配置的方法, 网络侧针对每一个子帧分配进行相应的 E-PDCCH传输资源配置, 终端在每 一个帧中分别釆用不同的方式进行 E-PDCCH盲检, 这样, 可以令 E-PDCCH传输实现更 好的链路自适应, 从而保证了各个子帧中 E-PDCCH传输的均衡性, 从而提高了终端的 E-PDCCH盲检效果, 进而提升了 E-PDCCH解调性能。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实 施例的精神和范围。 这样, 倘若本发明实施例的这些修改和变型属于本发明权利要求及其 等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种增强物理下行控制信道 E-PDCCH传输的方法, 其特征在于, 包括: 根据网络侧配置信息分别确定每一个子帧中进行 E-PDCCH传输时所占用的时频资 源;
根据确定结果分别在每个子帧中釆用相应的时频资源向终端侧进行 E-PDDCH传输。
2、 如权利要求 1 所述的方法, 其特征在于, 根据网络侧配置信息分别确定每一个子 帧中进行 E-PDCCH传输时占用的时频资源, 包括:
根据网络侧预设配置信息, 釆用预设规则分别确定每一个子帧内单个聚合等级下资源 粒度中包含的增强资源单元组 E-REG数目;
或 /和
基于网络侧预设配置信息, 釆用预设规则分别确定每一个子帧对应的聚合等级集合及 最小聚合等级。
3、 如权利要求 2 所述的方法, 其特征在于, 基于网络侧预设配置信息, 釆用预设规 则确定任意一个子帧内单个聚合等级下资源粒度中包含的 E-REG数目, 包括:
基于网络侧预设配置信息确定所述任意一个子帧内承载参考信号传输的资源单元 RE 数目,并基于所述承载参考信号传输的 RE数目确定所述任意一个子帧内一个 R-REG中用 于承载 E-PDCCH传输的 RE数目, 以及将所述承载 E-PDCCH传输的 RE数目与设定门限 值进行比较, 根据比较结果确定所述任意一个子帧内单个聚合等级下资源粒度中包含的 E-REG数目。
4、 如权利要求 2 所述的方法, 其特征在于, 基于网络侧预设配置信息, 釆用预设规 则确定任意一个子帧对应的聚合等级集合及最小聚合等级, 包括:
基于网络侧预设配置信息确定所述任意一个子帧内承载参考信号传输的资源单元 RE 数目,并基于所述承载参考信号传输的 RE数目确定所述任意一个子帧内一个 R-REG中用 于承载 PDCCH传输的 RE数目, 以及将所述承载 PDCCH传输的 RE数目与设定门限值进 行比较, 根据比较结果确定所述任意一个子帧对应的聚合等级集合及最小聚合等级。
5、 如权利要求 2、 3或 4所述的方法, 其特征在于, 在根据网络侧预设配置信息, 釆 用预设规则分别确定每一个子帧内单个聚合等级下资源粒度中包含的增强资源单元组 E-REG数目后, 在进行 E-PDCCH传输之前, 包括:
釆用高层信令将每一个子帧中单个聚合等级下资源粒度包含的 E-REG数目通知终端 侧; 或者, 将网络侧预设配置信息通知终端侧, 令终端侧釆用与网络侧相同的预设规则分 别确定每一子帧中单个聚合等级下资源粒度包含的 E-REG数目;
在基于网络侧预设配置信息, 釆用预设规则分别确定每一个子帧对应的聚合等级集合 及最小聚合等级后, 在进行 E-PDCCH传输之前, 包括:
釆用高层信令向终端侧指示每一个子帧对应的聚合等级集合及最小聚合等级, 或者, 将网络侧预设的配置信息通知终端, 令终端釆用与网络则相同的预设规则确定每一个子帧 对应的聚合等级集合及最小聚合等级。
6、 如权利要求 5 所述的方法, 其特征在于, 釆用高层信令向终端侧指示任意一个子 帧对应的聚合等级集合及最小聚合等级, 包括:
釆用高层信令将所述任意一个子帧对应的最小聚合等级通知终端侧, 令终端侧根据获 得的最小聚合等级确定出相应的聚合等级集合; 或者,
釆用高层信令将所述任意一个子帧对应的聚合等级集合通知终端侧, 令终端侧根据获 得的聚合等级集合确定出相应的最小聚合等级; 或者,
釆用高层信令将所述任意一个子帧对应的候选 E-PDDCH信道集合通知终端侧, 令终 端侧根据候选 E-PDCCH信道集合确定出相应的聚合等级集合及最小聚合等级。
7、 一种增强物理下行控制信道 E-PDCCH盲检的方法, 其特征在于, 包括: 根据网络侧指示分别确定每一个子帧中进行 E-PDCCH盲检时占用的时频资源; 根据确定结果分别在每个子帧中釆用相应的时频资源进行 E-PDDCH盲检。
8、 如权利根据 7 所述的方法, 其特征在于, 所述根据网络侧指示分别确定每一个子 帧中进行 E-PDCCH传输时占用的时频资源, 包括:
根据网络侧发送的高层信令, 或者, 基于获得的网络侧预设配置信息, 釆用与网络侧 相同的预设规则, 分别确定每一个子帧中单个聚合等级下资源粒度包含的 E-REG数目; 或 /和
根据网络侧发送的高层信令, 或者, 基于获得的网络侧预设配置信息, 釆用与网络侧 相同的预设规则, 分别确定每一个子帧对应的聚合等级集合及最小聚合等级。
9、 如权利要求 8 所述的方法, 其特征在于, 根据网络侧发送的高层信令确定任意一 个子帧对应的聚合等级集合及最小聚合等级, 包括:
根据网络侧发送的高层信令获得所述任意一个子帧对应的最小聚合等级, 并根据所述 最小聚合等级确定出相应的聚合等级集合; 或者,
根据网络侧发送的高层信令获得所述任意一个子帧对应的聚合等级集合, 并根据所述 聚合等级集合确定出相应的最小聚合等级; 或者,
根据网络侧发送的高层信令获得所述任意一个子帧对应的 E-PDDCH信道集合, 并根 据所述候选 E-PDCCH信道集合确定出相应的聚合等级集合及最小聚合等级。
10、 如权利要求 8或 9所述的方法, 其特征在于, 基于获得的网络侧预设配置信息, 釆用与网络侧相同的预设规则, 确定任意一个子帧内单个聚合等级下资源粒度中包含的 E-REG数目, 包括: 基于网络侧预设配置信息确定所述任意一个子帧内承载参考信号传输的资源单元 RE 数目,并基于所述承载参考信号传输的 RE数目确定所述任意一个子帧内一个 R-REG中用 于承载 E-PDCCH传输的 RE数目, 以及将所述承载 E-PDCCH传输的 RE数目与设定门限 值进行比较, 根据比较结果确定所述任意一个子帧内单个聚合等级下资源粒度中包含的 E-REG数目。
11、 如权利要求 8或 9所述的方法, 其特征在于, 基于获得的网络侧预设配置信息, 釆用与网络侧相同的预设规则确定任意一个子帧对应的聚合等级集合及最小聚合等级, 包 括:
基于网络侧预设配置信息确定所述任意一个子帧内承载参考信号传输的资源单元 RE 数目,并基于所述承载参考信号传输的 RE数目确定所述任意一个子帧内一个 R-REG中用 于承载 PDCCH传输的 RE数目, 以及将所述承载 PDCCH传输的 RE数目与设定门限值进 行比较, 根据比较结果确定所述任意一个子帧对应的聚合等级集合及最小聚合等级。
12、 一种增强物理下行控制信道 E-PDCCH传输的装置, 其特征在于, 包括: 处理单元, 用于根据网络侧配置信息分别确定每一个子帧中进行 E-PDCCH传输时所 占用的时频资源;
通信单元, 用于根据确定结果分别在每个子帧中釆用相应的时频资源向终端侧进行 E-PDDCH传输。
13、 如权利要求 12 所述的装置, 其特征在于, 所述处理单元根据网络侧配置信息分 别确定每一个子帧中进行 E-PDCCH传输时占用的时频资源时,根据网络侧预设配置信息, 釆用预设规则分别确定每一个子帧内单个聚合等级下资源粒度中包含的增强资源单元组 E-REG数目; 或 /和, 所述处理单元根据网络侧配置信息分别确定每一个子帧中进行 E-PDCCH传输时占用的时频资源时, 基于网络侧预设配置信息, 釆用预设规则分别确定 每一个子帧对应的聚合等级集合及最小聚合等级。
14、 如权利要求 13 所述的装置, 其特征在于, 所述处理单元基于网络侧预设配置信 息, 釆用预设规则确定任意一个子帧内单个聚合等级下资源粒度中包含的 E-REG数目时, 基于网络侧预设配置信息确定所述任意一个子帧内承载参考信号传输的资源单元 RE数 目,并基于所述承载参考信号传输的 RE数目确定所述任意一个子帧内一个 R-REG中用于 承载 E-PDCCH传输的 RE数目, 以及将所述承载 E-PDCCH传输的 RE数目与设定门限值 进行比较, 根据比较结果确定所述任意一个子帧内单个聚合等级下资源粒度中包含的 E-REG数目。
15、 如权利要求 13 所述的装置, 其特征在于, 所述处理单元基于网络侧预设配置信 息, 釆用预设规则确定任意一个子帧对应的聚合等级集合及最小聚合等级时, 基于网络侧 预设配置信息确定所述任意一个子帧内承载参考信号传输的资源单元 RE数目, 并基于所 述承载参考信号传输的 RE数目确定所述任意一个子帧内一个 R-REG中用于承载 PDCCH 传输的 RE数目, 以及将所述承载 PDCCH传输的 RE数目与设定门限值进行比较,根据比 较结果确定所述任意一个子帧对应的聚合等级集合及最小聚合等级。
16、 如权利要求 13、 14或 15所述的装置, 其特征在于, 所述处理单元根据网络侧预 设配置信息, 釆用预设规则分别确定每一个子帧内单个聚合等级下资源粒度中包含的增强 资源单元组 E-REG数目后, 所述通信单元在进行 E-PDCCH传输之前, 所述通信单元釆用 高层信令将每一个子帧中单个聚合等级下资源粒度包含的 E-REG数目通知终端侧; 或者, 将网络侧预设配置信息通知终端侧, 令终端侧釆用与网络侧相同的预设规则分别确定每一 子帧中单个聚合等级下资源粒度包含的 E-REG数目;
所述处理单元基于网络侧预设配置信息, 釆用预设规则分别确定每一个子帧对应的聚 合等级集合及最小聚合等级后, 所述通信单元在进行 E-PDCCH传输之前, 所述通信单元 釆用高层信令向终端侧指示每一个子帧对应的聚合等级集合及最小聚合等级, 或者, 将网 络侧预设的配置信息通知终端, 令终端釆用与网络则相同的预设规则确定每一个子帧对应 的聚合等级集合及最小聚合等级。
17、 如权利要求 16 所述的装置, 其特征在于, 所述通信单元釆用高层信令向终端侧 指示任意一个子帧对应的聚合等级集合及最小聚合等级时, 釆用高层信令将所述任意一个 子帧对应的最小聚合等级通知终端侧, 令终端侧根据获得的最小聚合等级确定出相应的聚 合等级集合; 或者, 釆用高层信令将所述任意一个子帧对应的聚合等级集合通知终端侧, 令终端侧根据获得的聚合等级集合确定出相应的最小聚合等级; 或者, 釆用高层信令将所 述任意一个子帧对应的候选 E-PDDCH信道集合通知终端侧,令终端侧才 居候选 E-PDCCH 信道集合确定出相应的聚合等级集合及最小聚合等级。
18、 一种增强物理下行控制信道 E-PDCCH盲检的装置, 其特征在于, 包括: 控制单元, 用于根据网络侧指示分别确定每一个子帧中进行 E-PDCCH盲检时占用的 时频资源;
盲检单元, 用于根据确定结果分别在每个子帧中釆用相应的时频资源进行 E-PDDCH 盲检。
19、 如权利根据 18 所述的装置, 其特征在于, 所述控制单元根据网络侧指示分别确 定每一个子帧中进行 E-PDCCH传输时占用的时频资源时,
根据网络侧发送的高层信令, 或者, 基于获得的网络侧预设配置信息, 釆用与网络侧 相同的预设规则, 分别确定每一个子帧中单个聚合等级下资源粒度包含的 E-REG数目; 或 /和
根据网络侧发送的高层信令, 或者, 基于获得的网络侧预设配置信息, 釆用与网络侧 相同的预设规则, 分别确定每一个子帧对应的聚合等级集合及最小聚合等级。
20、 如权利要求 19 所述的装置, 其特征在于, 所述控制单元根据网络侧发送的高层 信令确定任意一个子帧对应的聚合等级集合及最小聚合等级时, 根据网络侧发送的高层信 令获得所述任意一个子帧对应的最小聚合等级, 并根据所述最小聚合等级确定出相应的聚 合等级集合; 或者, 根据网络侧发送的高层信令获得所述任意一个子帧对应的聚合等级集 合, 并根据所述聚合等级集合确定出相应的最小聚合等级; 或者, 根据网络侧发送的高层 信令获得所述任意一个子帧对应的 E-PDDCH信道集合, 并根据所述候选 E-PDCCH信道 集合确定出相应的聚合等级集合及最小聚合等级。
21、 如权利要求 19或 20所述的装置, 其特征在于, 所述控制单元基于获得的网络侧 预设配置信息, 釆用与网络侧相同的预设规则, 确定任意一个子帧内单个聚合等级下资源 粒度中包含的 E-REG数目时,基于网络侧预设配置信息确定所述任意一个子帧内承载参考 信号传输的资源单元 RE数目, 并基于所述承载参考信号传输的 RE数目确定所述任意一 个子帧内一个 R-REG中用于承载 E-PDCCH传输的 RE数目, 以及将所述承载 E-PDCCH 传输的 RE数目与设定门限值进行比较, 根据比较结果确定所述任意一个子帧内单个聚合 等级下资源粒度中包含的 E-REG数目。
22、 如权利要求 19或 20所述的装置, 其特征在于, 所述控制单元基于获得的网络侧 预设配置信息, 釆用与网络侧相同的预设规则确定任意一个子帧对应的聚合等级集合及最 小聚合等级时, 基于网络侧预设配置信息确定所述任意一个子帧内承载参考信号传输的资 源单元 RE数目, 并基于所述承载参考信号传输的 RE数目确定所述任意一个子帧内一个 R-REG中用于承载 PDCCH传输的 RE数目,以及将所述承载 PDCCH传输的 RE数目与设 定门限值进行比较, 根据比较结果确定所述任意一个子帧对应的聚合等级集合及最小聚合 等级。
PCT/CN2013/074417 2012-04-23 2013-04-19 一种e-pdcch传输及盲检的方法及装置 WO2013159676A1 (zh)

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