WO2013139012A1 - Procédé de transmission de canal de commande sur la liaison descendante amélioré, procédé de détection, et dispositif correspondant - Google Patents

Procédé de transmission de canal de commande sur la liaison descendante amélioré, procédé de détection, et dispositif correspondant Download PDF

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Publication number
WO2013139012A1
WO2013139012A1 PCT/CN2012/072729 CN2012072729W WO2013139012A1 WO 2013139012 A1 WO2013139012 A1 WO 2013139012A1 CN 2012072729 W CN2012072729 W CN 2012072729W WO 2013139012 A1 WO2013139012 A1 WO 2013139012A1
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WO
WIPO (PCT)
Prior art keywords
ecce
mobile station
antenna port
index
aggregation level
Prior art date
Application number
PCT/CN2012/072729
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English (en)
Chinese (zh)
Inventor
张元涛
张健
王轶
周华
Original Assignee
富士通株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士通株式会社 filed Critical 富士通株式会社
Priority to PCT/CN2012/072729 priority Critical patent/WO2013139012A1/fr
Priority to CN201280061629.6A priority patent/CN103988562B/zh
Publication of WO2013139012A1 publication Critical patent/WO2013139012A1/fr

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Classifications

    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • the present invention relates to a wireless communication technology, and more particularly to a method, a detection method, and an enhanced downlink control channel for an LTE (Long Term Evolution)/LTE-A (LTE-Advanced, Enhanced Long Term Evolution) system.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced, Enhanced Long Term Evolution
  • the base station uses the physical downlink control channel (PDCCH) to transmit control information, such as downlink scheduling information.
  • PDCCH physical downlink control channel
  • ePDCCH enhanced downlink control channel
  • the ePDCCH is transmitted in the data area, and is used in a frequency division multiplexing manner with a PDSCH (Physical Downlink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • a minimum unit constituting an ePDCCH is an eCCE (enhanced control channel element), and a physical resource block (PRB) may include multiple eCCEs, as shown in FIG. 2, one physical resource block.
  • the (PRB pair) includes four eCCEs, one eCCE includes three subcarriers in the frequency domain (f), and all OFDM symbols except the PDCCH are included in the time domain (t).
  • the eCCE in a PRB pair may carry the ePDCCH of different mobile stations. If the aggregation level of the mobile station 1 is 1, the base station may send the ePDCCH to the eCCEl, and the aggregation level of the mobile station 2 is 2.
  • eCCE2 and eCCE3 send ePDCCH and the like for them.
  • the ePDCCH uses channel demodulation reference symbols (DM-RS, DeModulation Reference Symbol) for channel estimation.
  • DM-RS channel demodulation reference symbols
  • the available DM-RS antenna ports are ports 7-10.
  • One question is how does the mobile station know which antenna port is used?
  • One solution to this problem is that the base station is explicitly configured for each mobile station with an antenna port, either in a semi-static or dynamic manner.
  • Another solution is that there is a predetermined correspondence between the eCCE and the antenna port. As shown in FIG. 3, if the search space of the aggregation level 1 of the mobile station 1 includes the eCCEl in FIG. 3(a), the corresponding , this mobile station will use port 7 for channel estimation. If the mobile station's aggregation level 2 search space contains eCCE3 and eCCE4 in the right picture of Figure 3 (b), then the mobile station will use antenna port 9 for channel estimation.
  • Solution 1 will increase the signaling overhead.
  • Solution 2 uses different antenna ports for different aggregation levels. Therefore, different antenna ports are needed for channel estimation, which increases the complexity of the mobile station receiver.
  • An object of the embodiments of the present invention is to provide a method, a method, and a device for transmitting an enhanced downlink control channel, so as to reduce the complexity of channel estimation by a mobile station.
  • a method for transmitting an enhanced downlink control channel includes:
  • the base station selects, according to the determined aggregation level of the mobile station, a candidate location corresponding to the aggregation level in the search space allocated to the mobile station, and sends an enhanced downlink control channel to the mobile station at the selected candidate location.
  • ePDCCH enhanced downlink control channel
  • the base station determines the pilot reference according to the index of the resident eCCE on the lowest resource block in the frequency domain in the search space allocated according to the preset aggregation level of 1, and the correspondence between the preset eCCE and the antenna port. Symbolic antenna port;
  • the base station transmits the pilot reference symbol to the mobile station on the resource corresponding to the determined antenna port.
  • a method for detecting an enhanced downlink control channel is provided, where the method includes:
  • the mobile station detects the ePDCCH on the search space corresponding to each determined aggregation level
  • the mobile station determines the pilot according to the index of the resident eCCE on the lowest resource block in the frequency domain in the search space allocated according to the preset aggregation level of 1, and the correspondence between the preset eCCE and the antenna port.
  • the mobile station performs channel estimation according to the antenna port of the pilot reference symbol, and demodulates the ePDCCH according to the result of the channel estimation.
  • a base station includes: a first sending unit, configured to select, in a search space allocated for the mobile station, according to a determined aggregation level of the mobile station, a candidate location of the aggregation level, sent to the mobile station at the selected candidate location Sending an enhanced downlink control channel (ePDCCH);
  • ePDCCH enhanced downlink control channel
  • a determining unit which is determined according to an index of the resident eCCE on the lowest resource block in the frequency domain in the search space allocated according to the preset aggregation level of 1, and a correspondence between the preset eCCE and the antenna port.
  • a second sending unit that sends the pilot reference symbol to the mobile station on a resource corresponding to the antenna port determined by the determining unit.
  • a mobile station includes: a detecting unit that detects an ePDCCH on a search space corresponding to each determined aggregation level; a determining unit, according to The pre-set aggregation level is an index of the resident eCCE on the lowest resource block in the frequency domain, and a correspondence between the preset eCCE and the antenna port, and the antenna port of the pilot reference symbol is determined;
  • a processing unit configured to perform channel estimation according to an antenna port of the pilot reference symbol determined by the determining unit, and demodulate the ePDCCH according to a result of the channel estimation.
  • a computer readable program wherein, when the program is executed in a terminal device, the program causes the computer to perform the cooperative multipoint transmission mode in the terminal device Information feedback method.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform an information feedback method in the cooperative multipoint transmission mode described above in a terminal device .
  • a computer readable program wherein, when the program is executed in a base station, the program causes a computer to execute information in the cooperative base station in the cooperative multipoint transmission mode in the base station Feedback configuration method.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform an information feedback configuration method in a cooperative multipoint transmission mode in a base station .
  • the embodiment of the present invention have the following advantages: the embodiment of the present invention reduces the complexity of the channel estimation of the mobile station by using the same antenna port for all decoding candidate locations based on the correspondence between the preset eCCE and the antenna port. .
  • FIG. 1 is a schematic diagram of a current location of an ePDCCH
  • FIG. 2 is a schematic structural view of an eCCE
  • 3 is a schematic diagram of correspondence between an eCCE and an antenna port
  • FIG. 4 is a flowchart of a method for transmitting an ePDCCH according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a method for detecting an ePDCCH according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of an embodiment of a search space of an ePDCCH
  • FIG. 7 is a schematic diagram of another embodiment of a search space of an ePDCCH
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram showing the composition of a mobile station according to an embodiment of the present invention. detailed description
  • an embodiment of the present invention uses an ePDCCH transmission and detection method.
  • the embodiments of the present invention are not limited thereto, and are applicable to other systems involving control channel transmission.
  • base station and “mobile station” are used as entities for implementing the ePDCCH transmission and detection method of the embodiments of the present invention, however, the term is merely exemplary, and in the art, other An entity having a function of transmitting/detecting an ePDCCH is used to replace a base station/mobile station, or an entity having the same function is represented by other terms, and the embodiment is not limited thereto.
  • FIG. 4 is a flow chart of the method. Referring to Figure 4, the method includes:
  • Step 401 The base station selects, according to the determined aggregation level of the mobile station, a candidate location corresponding to the aggregation level in the search space allocated to the mobile station, and sends an enhanced type to the mobile station in the selected candidate location.
  • Downlink control channel ePDCCH
  • Step 402 The base station determines the pilot reference according to the index of the resident eCCE on the lowest resource block in the frequency domain in the search space according to the preset aggregation level of 1, and the correspondence between the preset eCCE and the antenna port. Symbolic antenna port;
  • Step 403 The base station sends the pilot reference symbol to the mobile station on the resource corresponding to the determined antenna port.
  • the eNodeB first determines the aggregation level for the mobile station, and corresponds to different aggregation levels, and the ePDCCH included in the ePDCCH is different.
  • the aggregation level is 1, the PDCCH includes one CCE, and the CCE can be sent in six possible locations.
  • the aggregation level is 2, the PDCCH includes two CCEs, and the two CCEs. It can be sent in 6 possible locations; when the aggregation level is 4, the PDCCH contains four CCEs, which can be sent in 2 possible locations.
  • the base station may select, according to the determined aggregation level, a candidate location corresponding to the aggregation level in the search space allocated to the mobile station, where the candidate location is selected.
  • the ePDCCH (one or more eCCEs) is sent for the mobile station.
  • a resident eCCE may be set in advance in the lowest resource block in the frequency domain in the search space allocated when the aggregation level is 1, and the index of the resident eCCE and the preset eCCE and the antenna are used.
  • the correspondence between the ports determines the antenna port of the pilot reference symbol.
  • the eCCE with the index of 0, 1, 2, or 3 on the lowest resource block in the frequency domain in the search space allocated when the aggregation level is 1 may be set as the resident.
  • the eCCE is reserved.
  • the eCCE with the index of 1 or 2 on the lowest resource block in the frequency domain in the search space allocated at the aggregation level of 1 can be set as the resident eCCE.
  • the preset resident eCCEs may be the same or different for different mobile stations.
  • the corresponding relationship between the eCCE and the antenna port is also preset.
  • the corresponding relationship shown in FIG. 3 may be used, that is, the eCCE with the index 0 corresponds to the antenna port 7; the eCCE with the index 1 corresponds to the antenna port 8; The eCCE of 2 corresponds to the antenna port 9; the eCCE with index 3 corresponds to the antenna port 10.
  • the antenna port of the pilot reference symbol is determined to be the antenna port 9 according to the correspondence between the eCCE and the antenna port. .
  • the base station may send a pilot reference symbol to the mobile station on the resource corresponding to the antenna port, so that the mobile station demodulates the channel according to the pilot reference symbol.
  • the ePDCCH obtained by blind detection.
  • the resident eCCE is preset on the lowest resource block in the frequency domain of the search space allocated when the aggregation level is 1, and the pilot reference symbol is sent on the antenna port corresponding to the resident eCCE. Therefore, the mobile station only needs to know the resident eCCE. Regardless of the aggregation level, the antenna port corresponding to the resident eCCE can be used for channel estimation, which reduces the complexity of the channel estimation by the mobile station.
  • the embodiment of the invention further provides a method for detecting an enhanced downlink control channel.
  • Figure 5 is a flow chart of the method. Referring to Figure 5, the method includes:
  • Step 501 The mobile station detects its ePDCCH on the search space corresponding to each determined aggregation level.
  • Step 502 The mobile station indexes the eCCE on the lowest resource block in the frequency domain according to the preset aggregation level. And determining a correspondence between the eCCE and the antenna port, and determining an antenna port of the pilot reference symbol;
  • Step 503 The mobile station performs channel estimation according to the antenna port of the pilot reference symbol, and demodulates the ePDCCH according to the result of the channel estimation.
  • the step 501 corresponds to the step 401 of the embodiment 1, when the base station selects a candidate location in the search space allocated for the mobile station, and sends the ePDCCH of the mobile station, Only the search space of its ePDCCH is known, and it is not known at which candidate location its ePDCCH is sent, and its own aggregation level is not known. Therefore, the mobile station first determines the search space of each aggregation level, and then detects in the search space. Its ePDCCH.
  • the specific detection method can be implemented by using existing methods, and details are not described herein again.
  • the mobile station after determining the location of the ePDCCH, the mobile station needs to perform channel estimation by using the antenna port of the pilot reference symbol in order to correctly demodulate the detected ePDCCH.
  • the foregoing The corresponding resident eCCE and the correspondence between the eCCE and the antenna port are also known by the mobile station in a parameter configuration manner. Therefore, in this embodiment, the mobile station also uses the index of the resident eCCE and the eCCE and the antenna port. Correspondence relationship, the antenna port of the pilot reference symbol is determined.
  • the base station transmits the ePDCCH to the mobile station through one antenna port
  • the preset aggregation level is 1
  • the eCCE on the lowest resource block in the frequency domain in the search space allocated is The index is 0, 1, 2 or 3.
  • the eCCE with index 0 corresponds to antenna port 7; the eCCE with antenna 1 is corresponding to antenna port 8; the eCCE with index 2 corresponds to antenna port 9; the eCCE with index 3 corresponds to antenna terminal P 10.
  • the base station transmits the ePDCCH to the mobile station through two antenna ports
  • the eCCE on the lowest resource block in the frequency domain in the search space allocated when the preset aggregation level is 1.
  • the index is 1 or 2.
  • the eCCE with index 1 or 2 corresponds to antenna port 8 and antenna port 9.
  • the mobile station determines the antenna port of the pilot reference symbol, and then uses the antenna port to perform channel estimation, thereby solving the detected ePDCCH.
  • the same antenna port is used for different aggregation levels, and the same antenna port is used for channel estimation regardless of the aggregation level in which the mobile station detects the ePDCCH in the aggregation level, which reduces the channel estimation of the mobile station. the complexity.
  • FIG. 6 is a schematic diagram of one embodiment of a search space of a mobile station.
  • the base station sends an ePDCCH to the mobile station through an antenna port, and the base station configures a search space of four PRB pairs for the mobile station.
  • Each PRB pair contains 4 eCCEs.
  • the first PRB pair is the lowest resource block in the frequency domain.
  • the first PRB pair (the lowest resource block in the frequency domain) when the aggregation level is 1 is used in advance.
  • the eCCE with the index of 2 is set to reside in the eCCE. According to the correspondence between the eCCE and the antenna port shown in FIG. 3, the resident eCCE corresponds to the antenna port 9.
  • the ePDCCH when the aggregation level is 1, the ePDCCH includes one eCCE, and the indexes of the four eCCEs in each PRB pair are assumed to be 0, 1, 2, and 3 respectively; when the aggregation level is 2, the ePDCCH includes For two eCCEs, it can be assumed that index 4 corresponds to eCCEO and eCCEl, assuming that index 5 corresponds to eCCE2 and eCCE3; when the aggregation level is 4, the ePDCCH contains four eCCEs, and it can be assumed that index 6 corresponds to eCCEO-eCCE3. It can be seen that index 4 is the upper index of index 0, 1, index 5 is the upper index of index 2, 3, and index 6 is the upper index of index 1, 2, 3, 4.
  • the base station sends an ePDCCH to the mobile station by using the method in this embodiment, and selects an antenna port (port 9) corresponding to the eCCE (eCCE2) to transmit a pilot reference symbol to the mobile station.
  • the mobile station obtains the location of its ePDCCH by blind detection.
  • the parameter configuration that is, pre-set
  • the mobile station can also know that the index of the eCCE included in the search space of the aggregation level 1 is the eCCE with the index of 2 in the PRB pair, and the inside of the first PRB pair
  • the eCCE with index 2 is the eCCE for which it resides.
  • the eCCE included in the aggregation level 2 of the mobile station must be the upper index of the eCCE where the aggregation level 1 is located.
  • aggregation level 1 contains index 2, and its upper index is 5, which contains eCCE2 and eCCE3 of the first PRB pair.
  • the corresponding index 6 in aggregation level 4 contains all eCCEs in the first PRB pair.
  • the mobile station can use the index of the antenna port corresponding to the eCCE to perform channel estimation, regardless of the aggregation level in which the base station sends the control signaling to the mobile station.
  • the example is that the base station sends the ePDCCH to the mobile station through one antenna port.
  • the base station sends the ePDCCH to the mobile station through the two antenna ports, only the search space allocated when the aggregation level is 1 can be selected.
  • the eCCE with the index of 1 or 2 in the lowest resource block in the frequency domain is the eCCE for which it resides.
  • the corresponding antenna port is port 8 and port 9.
  • the reason for the above configuration is mainly to consider the following factors.
  • port 8 and port 9 can be corresponding
  • port 9 and port 10 can also be corresponding.
  • the eCCEl of the corresponding antenna port 8 can be allocated to other UEs, for example. It is allocated as another UE that has an eCCE index of 0 and an aggregation level of 2, which reduces resource waste. If the corresponding antenna ports 9 and 10, then the corresponding port 10 index is 3 eCCE, That is, eCCE3 is vacated. Since there is no corresponding antenna port, the resources of this eCCE3 are wasted.
  • index 1 is selected, although it can correspond to port 7 and port 8, it can also correspond to port 8 and port 9, but when corresponding to port 7 and port 8, the resource of eCCEl is wasted, so it is better to correspond to port 8. And port 9.
  • the eCCE with an index of 0 or 3 is not selected as its resident eCCE, and the problem of waste of resources is also considered.
  • the eCCE with the index of 0 is selected as the eCCE, it can only correspond to the ports 7 and 8, which will cause the waste of the eCCEl of the corresponding port 8.
  • the eCCE with the index of 3 is elected as the e CCE. Ports 9 and 10 will waste resources of eCCE2 corresponding to port 9 previously.
  • FIG. 7 is a schematic diagram of another embodiment of a search space of a mobile station.
  • the ePDCCH of the mobile station has a different location on each PRB pair of the allocated search space.
  • the location of the ePDCCH of the mobile station on each PRB pair of the allocated search space is eCCE2.
  • the location of the ePDCCH of the mobile station on each PRB pair of the allocated search space is eCCE2, eCCE3, eCCE0, eCCEl, respectively. .
  • the base station sends the ePDCCH and the pilot reference symbol to the mobile station according to the method of Embodiment 1, and the mobile station detects its ePDCCH according to the method of Embodiment 2, regardless of whether the aggregation level is 1, 2, 4 or 8, using the antenna port 7 Channel estimation, thereby reducing the complexity of mobile station channel estimation.
  • the resident eCCE is preset, and the base station and the mobile station can be preset by parameter configuration, and the embodiment is not limited thereto.
  • the embodiment of the present invention further provides a base station, as described in the following Embodiment 3.
  • the principle of the base station is similar to that of the ePDCCH in the first embodiment. Therefore, the implementation of the base station can be implemented by referring to the method. It will not be repeated here.
  • FIG. 8 is a schematic diagram of the composition of the base station.
  • the base Station includes:
  • a first sending unit 81 according to the determined aggregation level of the mobile station, selecting a candidate location corresponding to the aggregation level in the search space allocated for the mobile station, and moving to the mobile station at the selected candidate location Transmitting an enhanced downlink control channel (ePDCCH);
  • ePDCCH enhanced downlink control channel
  • a determining unit 82 which is based on an index of the resident eCCE on the lowest resource block in the frequency domain in the search space allocated according to the preset aggregation level of 1, and a correspondence between the preset eCCE and the antenna port, Determining an antenna port of a pilot reference symbol;
  • the second transmitting unit 83 transmits the pilot reference symbol to the mobile station on a resource corresponding to the antenna port determined by the determining unit 82.
  • the corresponding relationship between the eCCE and the antenna port may be: an eCCE with an index of 0 corresponding to the antenna port 7; an eCCE with an index of 1 corresponding to the antenna port 8; an eCCE with an index of 2 corresponding to the antenna port 9; an eCCE with an index of 3 corresponding to the antenna port 10.
  • the first transmitting unit 81 sends the ePDCCH to the mobile station through two antenna ports, when the preset aggregation level is 1, the station on the lowest resource block in the frequency domain allocated in the search space is allocated. Leave the index of eCCE as 1 or 2.
  • the correspondence between the eCCE and the antenna port may be that the eCCE with the index of 1 or 2 corresponds to the antenna port 8 and the antenna port 9.
  • the base station determines the antenna port of the pilot reference symbol according to the preset index of the resident eCCE, so that the mobile station uses the antenna port for channel estimation, which reduces the complexity of the channel estimation by the mobile station.
  • the embodiment of the present invention further provides a mobile station, as described in Embodiment 4 below. Since the principle of the mobile station solving the problem is similar to the method for detecting the ePDCCH of Embodiment 2, the implementation of the mobile station can refer to the method. Implementation, repetition will not be repeated.
  • FIG. 9 is a schematic diagram of the composition of the mobile station.
  • the mobile station includes: a detecting unit 91, which detects an ePDCCH on a search space corresponding to each determined aggregation level; and a determining unit 92, which is configured on the lowest resource block in the frequency domain in the search space allocated according to a preset aggregation level of 1.
  • the processing unit 93 performs channel estimation according to the antenna port of the pilot reference symbol determined by the determining unit 92, and demodulates the ePDCCH according to the result of the channel estimation.
  • the index of the eCCE on the lowest resource block in the frequency domain in the search space allocated by the preset aggregation level is 1, 1, 2 or 3.
  • the corresponding relationship between the eCCE and the antenna port may be: an eCCE with an index of 0 corresponding to the antenna port 7; an eCCE with an index of 1 corresponding to the antenna port 8; an eCCE with an index of 2 corresponding to the antenna port 9; an eCCE with an index of 3 corresponding to the antenna port 10.
  • the index of the eCCE on the lowest resource block in the frequency domain in the search space allocated when the preset aggregation level is 1 is 1 Or 2.
  • the correspondence between the eCCE and the antenna port may be that the eCCE with index 1 or 2 corresponds to antenna port 8 and antenna port 9.
  • the same antenna port can be used for channel estimation regardless of the aggregation level, which reduces the complexity of the mobile station channel estimation.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes the computer to execute the method for transmitting the ePDCCH according to Embodiment 1 in the base station.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the method for transmitting the ePDCCH according to Embodiment 1 in a base station.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a mobile station, the program causes the computer to execute the detection method of the ePDCCH described in Embodiment 2 in the mobile station.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the detection method of the ePDCCH described in Embodiment 2 in the mobile station.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the invention also relates to A storage medium for storing the above programs, such as a hard disk, a magnetic disk, a compact disk, a DVD, a flash memory, or the like.

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Abstract

Dans ses modes de réalisation, la présente invention se rapporte à un procédé de transmission de canal de commande sur la liaison descendante amélioré, à un procédé de détection et à un dispositif correspondant. Le procédé selon l'invention comprend les étapes suivantes : sur la base d'un niveau d'agrégation déterminé d'une station mobile, une station de base sélectionne une position candidate correspondant au niveau d'agrégation dans un espace de recherche alloué à la station mobile, et elle transmet un canal de commande physique sur la liaison descendante amélioré (ePDCCH), à la station mobile, à la position candidate sélectionnée (401) ; la station de base détermine un port d'antenne d'un symbole de référence pilote, sur la base d'un indice prédéfini d'un élément de canal de commande amélioré (eCCE) résidant sur un bloc de ressource inférieur d'un domaine fréquentiel dans un espace de recherche alloué quand le niveau d'agrégation est égal à 1, et sur la base d'une relation correspondante prédéfinie entre le eCCE et le port d'antenne (402) ; enfin, la station de base envoie le symbole de référence pilote à la station mobile sur une ressource correspondant au port d'antenne déterminé (403). Selon le procédé et le dispositif décrits dans les modes de réalisation de la présente invention, la complexité de l'estimation de voie exécutée par la station mobile peut être réduite.
PCT/CN2012/072729 2012-03-21 2012-03-21 Procédé de transmission de canal de commande sur la liaison descendante amélioré, procédé de détection, et dispositif correspondant WO2013139012A1 (fr)

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PCT/CN2012/072729 WO2013139012A1 (fr) 2012-03-21 2012-03-21 Procédé de transmission de canal de commande sur la liaison descendante amélioré, procédé de détection, et dispositif correspondant
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