WO2019227432A1 - 一种下行控制信息的传输方法及装置 - Google Patents

一种下行控制信息的传输方法及装置 Download PDF

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Publication number
WO2019227432A1
WO2019227432A1 PCT/CN2018/089365 CN2018089365W WO2019227432A1 WO 2019227432 A1 WO2019227432 A1 WO 2019227432A1 CN 2018089365 W CN2018089365 W CN 2018089365W WO 2019227432 A1 WO2019227432 A1 WO 2019227432A1
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Prior art keywords
reg
regs
groups
group
dci
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PCT/CN2018/089365
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English (en)
French (fr)
Inventor
张瑞齐
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华为技术有限公司
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Priority to CN201880093454.4A priority Critical patent/CN112136351A/zh
Priority to PCT/CN2018/089365 priority patent/WO2019227432A1/zh
Publication of WO2019227432A1 publication Critical patent/WO2019227432A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a method and device for transmitting downlink control information (DCI).
  • DCI downlink control information
  • a base station before a base station sends data to a terminal device on a physical downlink shared channel (PDSCH), the base station usually uses a physical downlink control channel (PDCCH).
  • the DCI is sent to the terminal device to indicate the time-frequency resource occupied by the PDSCH allocated to the terminal device in the PDSCH area, the modulation and coding mode of the data, and the like.
  • the base station allocates the PDCCH, it usually uses resource group (resource element group, REG) as the minimum resource unit for allocation.
  • REG includes an orthogonal frequency division multiplexing (OFDM) symbol.
  • OFDM orthogonal frequency division multiplexing
  • the terminal device Because terminal equipment usually does not know the specific time-frequency position of the PDCCH and the number of CCEs allocated by the base station when receiving the DCI, the terminal device generally uses the protocol to blindly detect the PDCCH time-frequency position and the number of CCEs. Tune the DCI carried on the PDCCH. In order to detect the PDCCH, the CRS needs to be used for channel estimation. The CRS and the PDCCH have a wide coverage area, that is, the entire cell is covered. Since the DCI carries parameters for demodulating and decoding downlink data, there is a high requirement for accuracy, for example, the bit error rate cannot exceed 0.1%. When a terminal device is located at the edge of a cell, it will be subject to strong neighboring cell interference.
  • the base station needs to allocate more CCEs (such as 4 CCEs or 8 CCEs) to carry the DCI of the terminal device.
  • CCEs such as 4 CCEs or 8 CCEs
  • this approach will reduce the number of users that the PDCCH region can support.
  • a DCI of a terminal device is transmitted by using a beamforming weight specific to the terminal device.
  • a resource element (resource element, RE) of each REG allocated by the base station carries a demodulation reference signal (DMRS) dedicated to a terminal device.
  • DMRS demodulation reference signal
  • the terminal Enables the terminal to perform channel estimation based on DMRS, thereby demodulating DCI.
  • the DMRS and DCI are weighted and transmitted by a specific beamforming weight of the terminal device, the energy of the DCI and DMRS is more concentrated at the receiving end, thereby improving the received DCI and DMRS signal quality.
  • the REGs allocated by the base station are currently distributed in the frequency domain in a discrete state. Therefore, the terminal can only perform channel estimation and signal demodulation on individual REGs with one DMRS carried on each REG, so the accuracy of channel estimation is low. .
  • the present application provides a DCI transmission method and device, which can improve the accuracy of channel estimation.
  • the present application provides a DCI transmission method, which includes: allocating P resource groups REGs to a terminal device, the P REGs including M REG groups, and each REG group in the M REG groups includes K REGs, the resources occupied by the K REGs in the frequency domain are continuous, M ⁇ 1, K ⁇ 2, P ⁇ MK, M and K are integers; DCI and dedicated pilot signals are sent on the P REGs , The dedicated pilot signal is carried on at least one resource unit RE of each REG in the P REGs.
  • a network device includes at least M REG groups among the P REGs allocated to the terminal device, and the K REGs included in each REG group occupy the resources in the frequency domain continuously.
  • the terminal device can perform channel estimation on the corresponding REG group according to the dedicated pilot signal carried on each REG group, thereby improving the accuracy of the channel estimation, thereby improving the accuracy of demodulation of the DCI carried on each REG group.
  • the present application provides a DCI transmission method.
  • the method includes: receiving dedicated pilot signals and DCIs sent by network equipment on P resource groups REGs, and the dedicated pilot signals are carried in each of the P REGs.
  • the P REGs include M REG groups, each REG group in the M REG groups includes K REGs, and the resources occupied by the K REGs in the frequency domain are continuous, M ⁇ 1, K ⁇ 2, P ⁇ MK, M and K are integers; the dedicated pilot signals carried on each REG group are used to perform channel estimation on the corresponding REG group, and the channel estimation results of M REG groups are obtained;
  • the DCIs carried on the M REG groups are processed according to the channel estimation results of the M REG groups.
  • the terminal device can perform channel estimation on the corresponding REG group according to the dedicated pilot signal carried on each REG group, and improve the accuracy of the channel estimation, thereby improving the accuracy of demodulation of the DCI carried on each REG group.
  • a network device includes: an allocation unit for allocating P resource groups REG to a terminal device, the P REGs include M REG groups, and each REG group in the M REG groups includes K REG, the resources occupied by the K REGs in the frequency domain are continuous, M ⁇ 1, K ⁇ 2, P ⁇ MK, M and K are integers; the sending unit is used to send on the P REGs allocated by the allocation unit
  • the downlink control information DCI and a dedicated pilot signal are carried on at least one RE of each REG of the P REGs.
  • the present application provides a terminal device, including: a receiving unit, configured to receive dedicated pilot signals and downlink control signals DCI sent by network equipment on P resource groups REGs, and the dedicated pilot signals are carried on the P
  • the P REGs include M REG groups, each REG group in the M REG groups includes K REGs, and the resources occupied by the K REGs in the frequency domain Continuous, M ⁇ 1, K ⁇ 2, P ⁇ MK, M and K are integers
  • the processing unit is used to use the dedicated pilot signal carried on each REG group to perform channel estimation on the corresponding REG group to obtain M Channel estimation results of the REG groups; the processing unit is further configured to process the DCIs carried on the M REG groups according to the channel estimation results of the M REG groups.
  • the value of K is indicated by the radio resource control RRC signaling or the media access control unit MAC-CER.
  • the resources occupied by the K REGs in the frequency domain are continuous and include: in addition to REs carrying a physical control channel format indication channel PCFICH, a physical hybrid adaptive retransmission indication channel PHICH, and a cell-specific reference signal CRS, K There are no REs carrying other channels between the REGs.
  • PCFICH physical control channel format indication channel
  • PHICH physical hybrid adaptive retransmission indication channel
  • CRS cell-specific reference signal
  • the sequence number of each REG in the mth REG group of the M REG groups is ⁇ i m , i m + N, ..., i m + (K-1) N ⁇
  • i m represents the mth Sequence number of the first REG in each REG group
  • N represents the number of interleaver columns that interleave the P REGs, i m ⁇ 0, 1 ⁇ m ⁇ M, and m and i are positive integers.
  • the P REGs also include the M + 1th REG group
  • the M + 1th REG group includes the P-MK REGs
  • the sequence number of each REG in the M + 1th REG group In order: ⁇ i M + 1 , i M + 1 + N, ..., i M + 1 + (P-MK-1) N ⁇ , P-MK ⁇ K.
  • the M REG groups include B control channel elements CCE, and each CCE in the B CCEs includes L such REG groups, where M ⁇ BL, L ⁇ 1, B ⁇ 1, and B and L are integers. .
  • the M REG groups include B control channel elements CCE, and the K REGs in each REG group belong to the K CCEs in the B CCEs, respectively.
  • the method further includes: for K REGs in each REG group, assuming network equipment The same beamforming weights are used to send dedicated pilot signals and DCI on the K REGs.
  • the network device sends a dedicated pilot signal and DCI with different beamforming weights on the M REG groups.
  • a network device in a fifth aspect, is provided, and the communication device has a function of implementing the network device in the method design of the first aspect.
  • These functions can be implemented by hardware, or they can be implemented by hardware to execute corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • a terminal device is provided, and the communication device has a function of implementing the terminal device in the method design of the second aspect.
  • These functions can be implemented by hardware, or they can be implemented by hardware to execute corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • a communication device including a processor and a memory.
  • the memory is used to store a program or instruction
  • the processor is used to call and run the program or instruction from the memory, so that the communication device executes the method in the first aspect.
  • the communication device may further include a transceiver, which is used to support the communication device to perform data transmission, signaling, or information transmission in the method of the first aspect, for example, sending a DCI and a dedicated pilot signal.
  • a transceiver which is used to support the communication device to perform data transmission, signaling, or information transmission in the method of the first aspect, for example, sending a DCI and a dedicated pilot signal.
  • the communication device may be a network device or a part of the network device, such as a chip system in the network device.
  • the chip system is configured to support a network device to implement the functions involved in the foregoing aspects, for example, allocating, sending, or processing data and / or information involved in the foregoing methods.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the network device.
  • the chip system, including the chip may also include other discrete devices or circuit structures.
  • a communication device including a processor and a memory.
  • the memory is used to store a program or instruction
  • the processor is used to call and run the program or instruction from the memory, so that the communication device executes the method in the second aspect.
  • the communication device may further include a transceiver for supporting the communication device to perform data receiving, data receiving, signaling, or information receiving in the method of the second aspect, for example, receiving a DCI and a dedicated pilot signal.
  • a transceiver for supporting the communication device to perform data receiving, data receiving, signaling, or information receiving in the method of the second aspect, for example, receiving a DCI and a dedicated pilot signal.
  • the communication device may be a terminal device or a part of the terminal device, such as a chip system in the terminal device.
  • the chip system is configured to support a terminal device to implement the functions involved in the foregoing aspects, for example, to receive or process data and / or information involved in the foregoing methods.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the terminal device.
  • the chip system, including the chip may also include other discrete devices or circuit structures.
  • the present application provides a computer storage medium.
  • the computer storage medium stores instructions.
  • the computer is implemented as in the first aspect, the optional manner of the first aspect, the second aspect, or the first aspect.
  • the present application provides a computer program product containing instructions, which when run on a computer, causes the computer to implement the first aspect, the optional manner of the first aspect, the second aspect, or the optional aspect of the second aspect.
  • the DCI transmission method described in the above method is not limited to:
  • the present application provides a communication system including the network device according to the third aspect or any optional aspect of the third aspect, and the fourth aspect or any optional aspect of the fourth aspect. Or a terminal device according to the fifth aspect, and a terminal device according to the sixth aspect; or a communication device according to the seventh aspect or any optional aspect of the seventh aspect And the communication device according to the eighth aspect or any optional aspect of the eighth aspect.
  • FIG. 1 is a block diagram of a communication system provided by the present application.
  • FIG. 2 is a schematic diagram of an allocation method of REGs in the prior art
  • FIG. 5A is a first schematic diagram of interleaving of a REG provided by this application.
  • 5B is a second schematic diagram of interleaving of a REG provided in this application.
  • FIG. 6A is a first schematic diagram of interleaving of CCEs provided by the present application.
  • FIG. 6B is a second schematic diagram of interleaving of CCEs provided by the present application.
  • FIG. 7 is a schematic diagram of a bearer situation of a DCI and a DMRS provided in this application in a REG;
  • FIG. 8 is a schematic structural diagram of a network device provided by this application.
  • FIG. 9 is a schematic structural diagram of a terminal device provided by this application.
  • FIG. 10 is a schematic structural diagram of a communication device provided by the present application.
  • the DCI transmission method provided in this application can be applied to any system that needs to transmit DCI, including long term evolution (LTE) systems, advanced long term evolution (LTE-Avanced, LTE-A), or other methods
  • LTE long term evolution
  • LTE-Avanced LTE-Avanced
  • a wireless communication system of a wireless access technology such as a system using access technologies such as code division multiple access, frequency division multiple access, time division multiple access, orthogonal frequency division multiple access, and carrier aggregation (CA).
  • CA carrier aggregation
  • it can also be applied to the use of subsequent evolved systems, such as the fifth generation 5G system.
  • the DCI transmission method provided in this application may be applied to a communication system including at least one network device and at least one terminal device.
  • the network device may be a device deployed in a wireless access network to provide wireless communication functions for terminal devices, such as a base station (BS) or a base transceiver station (BTS).
  • BS base station
  • BTS base transceiver station
  • the names of equipment with base station functions may be different.
  • eNB evolved NodeB
  • 3G communication network
  • the above-mentioned devices having a base station function are collectively referred to as network devices.
  • the terminal devices involved in this application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, smart phones, smart watches, tablet computers, and various forms of user equipment (user equipment) , UE) and so on.
  • UE user equipment
  • a network device When a network device assigns a REG to a terminal device, it usually assigns them in order according to the sequence number of the REG. For example, if the sequence number of the first REG assigned by the network device to the terminal device is j, and the total number of assigned REGs is p, then the sequence numbers of the p REGs are j, j + 1, j + 2, ... , J + p-1. Assume that the total number of REGs in the PDCCH region in one subframe is J. As shown in FIG. 2, the p REGs are arranged according to the sequence number.
  • the network device inputs the p REGs into the interleaver, and the number of columns of the interleaver is N and the number of rows is ,among them Represents a round-up operation.
  • the interleaver maps the p REGs in rows as In a matrix with rows and N columns, the matrix is then exchanged with rows and columns according to a preset rule, and then an interleaver is output in the order of the columns of the matrix to complete the mapping to the frequency domain. Then in the frequency domain, the p REGs are distributed in the PDCCH region in a discrete state.
  • the p REGs are divided into one CCE every 9 numbers in sequence. Therefore, each REG in each CCE is also discrete in the frequency domain.
  • 3 REGs allocated by the network device to the terminal device constitute one REG
  • the 4 REs circled by the coil constitute one REG
  • All are discrete state distributions. This results in that when a terminal device performs channel estimation, it can only use the DMRS carried on each REG to perform channel estimation on an individual REG, so the accuracy of the channel estimation is low, which affects the demodulation of the DCI carried on the REG. .
  • the P REGs allocated by the network device to the terminal device include at least M REG groups, and the K REGs included in each REG group occupy the frequency domain.
  • the resources are continuous, so that the terminal device can perform channel estimation on the corresponding REG group according to the dedicated pilot signal carried on each REG group, and improve the accuracy of the channel estimation, thereby improving the demodulation of the DCI carried on each REG group. Correct rate.
  • FIG. 4 it is a schematic flowchart of an embodiment of a DCI transmission method provided by the present application.
  • the method includes:
  • Step 401 The network device allocates P REGs to the terminal device.
  • the P REGs include M REG groups.
  • Each REG group in the M REG groups includes K REGs.
  • the K REGs occupy the frequency domain. Resources are continuous, M ⁇ 1, K ⁇ 2, P ⁇ MK, M and K are integers.
  • one REG includes one orthogonal frequency division multiplexing (OFDM) symbol.
  • OFDM orthogonal frequency division multiplexing
  • REs carrying cell-specific reference signals (CRS) n consecutive Resource element (RE), n> 1, n integer.
  • the P REGs constituting the PDCCH allocated by the network device to the terminal device include at least M REG groups, and each REG group includes K consecutive REGs occupying resources in the frequency domain.
  • the resources occupied by the K REGs contained in each REG group in the frequency domain are continuous, meaning that in addition to carrying the physical control channel format indication channel (PCFICH), the physical hybrid adaptive retransmission indication channel ( Physical HARQ (indication channel, PHICH) and CRS REs, there are no REs carrying other channels between the K REGs. That is, the K REGs in each REG group may be adjacent in sequence, or may be adjacent in sequence through REs carrying PCFICH, PHICH, and / or CRS.
  • PCFICH physical control channel format indication channel
  • Physical HARQ indication channel
  • CRS REs there are no REs carrying other channels between the K REGs. That is, the K REGs in each REG group may be adjacent in sequence, or may be adjacent in sequence through REs carrying PCFICH, PHICH, and / or CRS.
  • the network device may allocate P REGs according to a preset sequence number rule.
  • the sequence number of each REG in the mth REG group of the M REG groups is ⁇ i m , i m + N, ..., i m + (K-1) N ⁇
  • i m represents the mth REG Sequence number of the first REG in the group
  • N represents the number of interleaver columns that interleave the P REGs
  • i m ⁇ 0, 1 ⁇ m ⁇ M and m and i are positive integers.
  • a total number of the sub-frame PDCCH region is J-REG.
  • the interleaver maps the three REGs to the interleaver row by row. Row, 32 column matrix. As shown in FIG. 5A, the three REGs are Rows, 32 columns of matrices are adjacent on one column. Therefore, according to the column output, when mapped to the frequency domain, the three REGs are continuous.
  • i 1 2
  • the serial numbers of the three REGs of the first REG group are 2,34,66 in sequence.
  • Maps to After the matrix of rows and 32 columns, the three REGs of the first REG group are also adjacent on one column. Therefore, according to the column output, when mapping to the frequency domain, the three REGs of the first REG group are also continuous.
  • the P REGs when P> MK, the P REGs also include the M + 1th REG group, the M + 1th REG group includes the P-MK REGs, and each REG in the M + 1th REG group
  • the serial numbers are ⁇ i M + 1 , i M + 1 + N, ..., i M + 1 + (P-MK-1) N ⁇ , and P-MK ⁇ K.
  • the P REGs can be divided into at least B (B ⁇ 1, B is an integer) CCEs.
  • the M REG groups may include at least B CCEs, and each CCE is composed of L (L ⁇ 1, L is an integer) REG groups, instead of being composed of multiple REGs with consecutive numbers, M ⁇ BL.
  • L L is an integer
  • the network device allocates 21 REGs to the terminal device, a total of 7 REG groups, and each REG group includes 3 REGs with continuous resources occupied in the frequency domain.
  • the distribution of the 30 REGs after being mapped by the interleaver can be shown in FIG. 6A.
  • the first to third REG groups constitute a CCE (assuming CCE1)
  • the fourth to sixth groups constitute a CCE (assuming CCE2).
  • the resources occupied by each K REG in the frequency domain in each CCE are continuous.
  • the K REGs in each REG group may belong to the K CCEs, respectively.
  • the distribution of the 18 REGs after being mapped by the interleaver can be shown in FIG. 6B.
  • two of the nine REGs belong to CCE3 and CCE4, respectively.
  • each REG in each CCE is in the frequency domain with a REG in another CCE Is continuous.
  • the value of K may be a preset fixed value, or may be indicated by high-level signaling.
  • it is indicated by radio resource control (radio resource control (RRC)) signaling or a multimedia access control unit (media access control-control element (MAC-CE)).
  • RRC radio resource control
  • MAC-CE multimedia access control unit
  • Step 402 The network device sends DCI and a dedicated pilot signal on the P REGs, and the dedicated pilot signal is carried on at least one RE of each REG in the P REGs.
  • each REG uses a designated RE to carry the dedicated pilot signal of the terminal device, and the remaining remaining REs are used to carry the DCI of the terminal device.
  • the dedicated pilot signal of the terminal device is the DMRS of the terminal device.
  • One REG contains four consecutive REs, one of which carries the DMRS, and the remaining three REs respectively carry Part of the terminal device is DCI.
  • the network device When the network device sends the DCI and the dedicated pilot signal on the P REGs, it may use the specific beamforming weights of the terminal device to send.
  • the beamforming weight value is a multiplication factor used by the network device when transmitting dedicated pilot signals and DCI on A (A ⁇ 1, A is an integer) antenna ports.
  • Network equipment sends DCI and dedicated pilot signals through specific beamforming weights of the terminal equipment, so that the energy of DCI and DMRS can be concentrated at the location of the terminal equipment, and the signal quality of the DCI and DMRS signals received by the terminal equipment can be improved.
  • the network device may use the same beamforming weights on the K REGs to send dedicated pilot signals and DCI.
  • the network device may use the same or different beamforming weights on M REG groups or M + 1 REG groups.
  • the specific value of the beamforming weights used by the network equipment may be different for different terminal equipment.
  • the beamforming weights used for a certain terminal equipment are generally specific to the terminal equipment.
  • the terminal device has a better performance weight.
  • the terminal device before receiving the DCI and the dedicated pilot signals on the P REGs, the terminal device needs to assume the network device adopts beamforming weighting according to the transmission rule corresponding to the network device.
  • the network device uses the same beamforming weights on the K REGs to send dedicated pilot signals and DCI.
  • the network equipment sends dedicated pilot signals and DCI using different or the same beamforming weights on the M REG groups.
  • Step 403 The terminal device uses the K dedicated pilot signals carried on each REG group to perform channel estimation on the corresponding REG group, and obtains the channel estimation results of the M REG groups.
  • the network device allocates at least M REG groups in a grouping manner when assigning the PDCCH to the terminal device, and the K REGs included in each REG group occupy consecutive resources in the frequency domain. Therefore, when the terminal device performs channel estimation, it can perform channel estimation for each REG group. For each REG group in the M group, since the resources occupied by the K REGs in the frequency domain are continuous, the terminal device can use the dedicated pilot signals carried on the REG group to perform channel estimation on the REG group to obtain the REG. Group channel estimation results, instead of performing channel estimation on a single REG, improves the accuracy of the channel estimation results.
  • Step 404 The terminal device processes the DCIs carried on the M REG groups according to the channel estimation results of the M REG groups.
  • the terminal device When the terminal device obtains the channel estimation results of the M REG groups, it can use the corresponding channel estimation results to separately process the DCIs carried on the M REG groups, including demodulation processing and decoding processing.
  • the terminal device can also perform channel estimation on the M + 1th REG group. And use the channel estimation results to process part of the DCI carried on the M + 1th REG group.
  • the terminal device can perform channel estimation on the corresponding REG group according to the K dedicated pilot signals carried on each REG group to improve the accuracy of the channel estimation, thereby improving the accuracy of the demodulation of the DCI carried on each REG group.
  • the terminal device and the network device include a hardware structure and / or a software module corresponding to each function.
  • this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is performed by hardware or computer software-driven hardware depends on the specific application and design constraints of the technical solution. A professional technician can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.
  • a possible structure diagram of a network device includes:
  • An allocation unit 801 is configured to allocate P REGs to the terminal device, the P REGs include M REG groups, each REG group in the M REG groups includes K REGs, and the K REGs are in a frequency domain
  • the resources occupied on the network are continuous, M ⁇ 1, K ⁇ 2, P ⁇ MK, M and K are integers.
  • the sending unit 802 is configured to send a DCI and a dedicated pilot signal on the P REGs allocated by the allocating unit 801, where the dedicated pilot signal is carried on one RE of each REG in the P REGs.
  • the resources occupied by the K REGs in the frequency domain are continuous and include: Except for REs carrying PCFICH, PHICH, and cell-specific reference signals CRS, there are no other bearers between the K REGs carrying other channels. RE.
  • the sequence number of each REG in the mth REG group of the M REG groups is ⁇ i m , i m + N, ..., i m + (K-1) N ⁇
  • i m represents Sequence number of the first REG in the mth REG group
  • N represents the number of interleaver columns that interleave the P REGs, i m ⁇ 0, 1 ⁇ m ⁇ M, both m and i are Positive integer.
  • the P REGs further include an M + 1th REG group, the M + 1th REG group includes P-MK REGs, and the M + 1th REG group
  • the serial numbers of each REG in the sequence are ⁇ i M + 1 , i M + 1 + N, ..., i M + 1 + (P-MK-1) N ⁇ , and P-MK ⁇ K.
  • the value of K is indicated by radio resource control RRC signaling.
  • the M REG groups include B control channel element CCEs, and each CCE in the B CCEs includes L REG groups, M ⁇ BL, L ⁇ 1, B ⁇ 1, B and L is an integer.
  • the M REG groups include B control channel elements CCE, and the K REGs belong to the K CCEs in the B CCEs, respectively.
  • a possible structure diagram of a terminal device includes:
  • a receiving unit 901 is configured to receive a dedicated pilot signal and DCI sent by a network device on P REGs, where the dedicated pilot signal is carried on one RE of each REG in the P REGs, and the P
  • the REG includes M REG groups, each REG group of the M REG groups includes K REGs, and the resources occupied by the K REGs in the frequency domain are continuous, M ⁇ 1, K ⁇ 2, and P ⁇ MK , M and K are integers;
  • a processing unit 902 configured to use the K dedicated pilots carried on each REG group to perform joint channel estimation on corresponding REG groups, and obtain channel estimation results of the M REG groups;
  • the processing unit 902 is further configured to process the DCIs carried on the M REG groups according to a channel estimation result of the M REG groups.
  • the processing unit 902 is further configured to: before the receiving unit 901 receives dedicated pilot signals and DCIs sent by network equipment on P REGs, for the K REGs in each REG group, It is assumed that the network device sends the dedicated pilot signal and the DCI with the same beamforming weights on the K REGs.
  • the processing unit 901 is further configured to, for the M REG groups, assuming that the network device sends the dedicated pilot signal and the dedicated pilot signals with different beamforming weights on the M REG groups.
  • the DCI is further configured to, for the M REG groups, assuming that the network device sends the dedicated pilot signal and the dedicated pilot signals with different beamforming weights on the M REG groups.
  • the resources occupied by the K REGs in the frequency domain are continuous, including: except for the REs of PCFICH, PHICH, and CRS, there are no REs carrying other channels between the K REGs.
  • the sequence number of each REG in the mth REG group of the M REG groups is ⁇ i m , i m + N, ..., i m + (K-1) N ⁇
  • i m represents Sequence number of the first REG in the mth REG group
  • N represents the number of interleaver columns that interleave the P REGs, i m ⁇ 0, 1 ⁇ m ⁇ M, both m and i are Positive integer.
  • the P REGs further include an M + 1th REG group, the M + 1th REG group includes P-MK REGs, and the M + 1th REG group
  • the serial numbers of each REG in the sequence are ⁇ i M + 1 , i M + 1 + N, ..., i M + 1 + (P-MK-1) N ⁇ , and P-MK ⁇ K.
  • the value of K is indicated by radio resource control RRC signaling.
  • the M REG groups include B control channel element CCEs, and each CCE in the B CCEs includes L REG groups, M ⁇ BL, L ⁇ 1, B ⁇ 1, B and L is an integer.
  • the M REG groups include B control channel elements CCE, and the K REGs belong to the K CCEs in the B CCEs, respectively.
  • FIG. 10 it is a schematic structural diagram of a communication device provided in the present application, including a processor 1001 and a memory 1002.
  • the processor 1001 may be a central processing unit (CPU), a general-purpose processor 1001, a digital signal processor (DSP), and an application-specific integrated circuit (ASIC).
  • the processor 1001 may also be a combination that realizes computing functions, for example, it includes a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the communication device may further include a transceiver 1003 for supporting the communication device to perform data transmission, signaling, or information transmission in the data transmission method, for example, receiving or sending DCI and a dedicated pilot signal.
  • a transceiver 1003 for supporting the communication device to perform data transmission, signaling, or information transmission in the data transmission method, for example, receiving or sending DCI and a dedicated pilot signal.
  • the processor 1001, the transceiver 1003, and the memory 1002 are connected to each other through a bus 1004.
  • the bus 1004 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA). ) Bus and so on.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus 1004 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • the communication device may be a network device or a part of the network device, such as a chip system in the network device.
  • the chip system is configured to support a network device to implement the functions involved in the foregoing aspects, for example, allocating, sending, or processing data and / or information involved in the foregoing methods.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the network device.
  • the chip system, including the chip may also include other discrete devices or circuit structures.
  • the processor 1001 is configured to be coupled to the memory 1002, and read and execute instructions in the memory 1002 to implement the steps performed by the network device in the method embodiment shown in FIG. 4. For details, refer to the related description in the method embodiment shown in FIG. 4, and details are not described herein again.
  • the communication device may be a terminal device or a part of the terminal device, such as a chip system in the terminal device.
  • the chip system is configured to support a terminal device to implement the functions involved in the foregoing aspects, for example, to receive or process data and / or information involved in the foregoing methods.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the terminal device.
  • the chip system, including the chip may also include other discrete devices or circuit structures.
  • the processor 1001 is configured to be coupled to the memory 1002, and read and execute the instructions in the memory 1002 to implement the method shown in FIG. 4 Steps performed by the terminal device in the method embodiment.
  • the processor 1001 is configured to be coupled to the memory 1002, and read and execute the instructions in the memory 1002 to implement the method shown in FIG. 4 Steps performed by the terminal device in the method embodiment.
  • the steps of the method or algorithm described in connection with the disclosure of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), erasable programmable read-only memory (erasable (programmable ROM, EPROM), electrically erasable programmable read-only memory (EPROM), registers, hard disks, mobile hard disks, read-only optical disks (CD-ROMs), or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC can be located in a core network interface device.
  • the processor and the storage medium can also exist as discrete components in the core network interface device.
  • the present application also provides a computer storage medium, where the computer storage medium may store a program, and when executed, the program may include some or all of the steps in the embodiments of the DCI transmission method provided by the application.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (English: ROM) or a random access memory (English: random access memory (RAM)).
  • the present application also provides a computer program product containing instructions, which when executed on a computer, causes the computer to perform some or all of the steps in the embodiments of the data transmission method provided by the present application.

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Abstract

本申请提供一种下行控制信息的传输方法及装置，涉及通信技术领域，能够提高信道估计的准确率。该方法包括：为终端设备分配P个资源组REG，该P个REG包括M个REG组，该M个REG组中的每个REG组包括K个REG，该K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数；在该P个REG上发送DCI和专用导频信号，专用导频信号承载在该P个REG中每一个REG的至少一个RE上。

Description

一种下行控制信息的传输方法及装置 技术领域
本申请涉及通信技术领域，尤其涉及一种下行控制信息(downlink control information，DCI)的传输方法及装置。
背景技术
在长期演进(long term evolution，LTE)***中，基站在物理下行共享信道(physical downlink shared channel，PDSCH)上向终端设备发送数据之前，通常会在物理下行控制信道(physical downlink control channel，PDCCH)上向终端设备发送DCI，以指示在PDSCH区域内分配给终端设备的PDSCH所占时频资源、数据的调制编码方式等。基站在分配PDCCH时，通常以资源组(resource element group，REG)为最小资源单位进行分配。一个REG包括一个正交频分复用(orthogonal frequency division multiplexing，OFDM)符号上，除了承载小区专用参考信号(cell-specific reference signals,CRS)的RE之外，连续的4个资源元素(resource element，RE)，9个REG构成一个控制信道单元(control channel element，CCE)。
由于终端设备在接收DCI时，通常不知道基站分配的PDCCH的具体时频位置以及CCE的个数，因此终端设备一般会采用协议规定的方式来盲检PDCCH时频位置以及CCE的数，从而解调PDCCH上承载的DCI。为了检测PDCCH，需要采用CRS做信道估计，CRS和PDCCH具有较宽的覆盖区域，即覆盖整个小区。由于DCI承载的是下行数据解调和解码所述的参数，有较高的正确率要求，比如误码率不能超过0.1％。当终端设备处于小区边缘时，会受到较强的邻小区干扰，为了保证检测正确率的要求，基站需要分配较多的CCE(例如4个CCE或者8个CCE)来承载该终端设备的DCI，以降低DCI的编码速率，提高解码性能。但是，由于PDCCH区域的资源有限，这种方式会减少PDCCH区域能够支持的用户个数。
目前提出一种采用终端设备特有的波束赋形权值，发送终端设备的DCI。在这种方式中，基站在分配的每个REG的一个资源元素(resource element，RE)承载一个终端设备专用的解调参考信号(demodulation reference signal，DMRS)。使得终端能够基于DMRS来进行信道估计，从而解调DCI。由于DMRS和DCI是通过该终端设备特定的波束赋形权值加权后发送，使得DCI和DMRS的能量在接收端更加集中，从而提高了接收的DCI和DMRS信号质量。
然而，目前基站分配的REG在频域上都是呈离散状态分布，因此终端只能每个REG上承载的一个DMRS对单独的REG进行信道估计和信号解调，因此信道估计的准确率较低。
发明内容
本申请提供一种DCI的传输方法及装置，能够提高信道估计的准确率。
第一方面，本申请提供一种DCI的传输方法，该方法包括：为终端设备分配P个资源组REG，该P个REG包括M个REG组，该M个REG组中的每个REG组包括K个REG，该K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数；在该P个REG上 发送DCI和专用导频信号，专用导频信号承载在该P个REG中每一个REG的至少一个资源单元RE上。
采用本申请提供的方法，网络设备在为终端设备分配的P个REG中，至少包括了M个REG组，且每个REG组中包括的K个REG在频域上所占的资源连续，以使得终端设备可以根据每个REG组上承载的专用导频信号对相应的REG组进行信道估计，提高信道估计的准确率，从而提高对每个REG组上承载的DCI的解调的正确率。
第二方面，本申请提供一种DCI的传输方法，该方法包括：在P个资源组REG上接收网络设备发送的专用导频信号和DCI，专用导频信号承载在P个REG中的每个REG的至少一个资源单元RE上，该P个REG包括M个REG组，该M个REG组中的每个REG组包括K个REG，该K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数；采用每个REG组上承载的专用导频信号，对相应的REG组进行信道估计，获取M个REG组的信道估计结果；根据M个REG组的信道估计结果，对M个REG组上承载的DCI进行处理。
采用本申请提供的方法，由于网络设备为终端设备分配的P个REG中，至少包括M个REG组，且每个REG组中包括的K个REG在频域上所占的资源连续，因此终端设备可以根据每个REG组上承载的专用导频信号对相应的REG组进行信道估计，提高信道估计的准确率，从而提高对每个REG组上承载的DCI的解调的正确率。
第三方面，一种网络设备，包括：分配单元，用于为终端设备分配P个资源组REG，该P个REG包括M个REG组，该M个REG组中的每个REG组包括K个REG，该K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数；发送单元，用于在分配单元分配的P个REG上发送下行控制信息DCI和专用导频信号，专用导频信号承载在该P个REG中每一个REG的至少一个RE上。
第四方面，本申请提供一种终端设备，包括：接收单元，用于在P个资源组REG上接收网络设备发送的专用导频信号和下行控制信号DCI，专用导频信号承载在该P个REG中的每个REG的至少一个RE上，该P个REG包括M个REG组，该M个REG组中的每个REG组包括K个REG，该K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数；处理单元，用于采用每个REG组上承载的专用导频信号，对相应的REG组进行信道估计，获取M个REG组的信道估计结果；处理单元，还用于根据M个REG组的信道估计结果，对M个REG组上承载的DCI进行处理。
对于第一方面至第四方面，可选的，K的取值由无线资源控制RRC信令或者媒体接入控制单元MAC-CER指示。
可选的，K个REG在频域上所占的资源连续，包括：除了承载物理控制信道格式指示信道PCFICH、物理混合自适应重传指示信道PHICH以及小区专用参考信号CRS的RE之外，K个REG之间不存在承载其他信道的RE。
可选的，M个REG组中第m个REG组中的各个REG的序号依次为{i m，i m+N，……，i m+(K-1)N},i m表示第m个REG组中的第一个REG的序号，N表示对P个REG进行交织处理的交织器的列数，i m≥0，1≤m≤M，m和i均为正整数。
可选的，第m个REG组中第一个REG的序号i m满足：i m＝i 1+m-1，i 1表示第1个REG组中的第一个REG的序号。
可选的，当P＞MK时，P个REG还包括第M+1个REG组，第M+1个REG组包括P-MK个 REG，第M+1个REG组中的各个REG的序号依次为{i M+1，i M+1+N，……，i M+1+(P-MK-1)N}，P-MK＜K。
可选的，M个REG组包括B个控制信道单元CCE，该B个CCE中的每个CCE包括L个该REG组，M≥BL，L≥1，B≥1，B和L均为整数。
可选的，M个REG组包括B个控制信道单元CCE，每个REG组中的K个REG分别属于该B个CCE中的K个CCE。
基于第二方面或第四方面，可选的，在P个REG上接收网络设备发送的专用导频信号和DCI之前，该方法还包括：对于每个REG组中的K个REG，假设网络设备在K个REG上采用相同的波束赋形权值发送专用导频信号和DCI。
可选的，对于M个REG组，假设网络设备在M个REG组上采用不同的波束赋形权值发送专用导频信号和DCI。
第五方面，提供了一种网络设备，所述通信装置具有实现上述第一方面的方法设计中的网络设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第六方面，提供了一种终端设备，所述通信装置具有实现上述第二方面的方法设计中的终端设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第七方面，提供了一种通信装置，包括处理器和存储器。该存储器用于存储程序或指令，该处理器用于从存储器中调用并运行该程序或指令，使得该通信装置执行上述第一方面中的方法。
可选的，所述通信装置还可以包括收发器，用于支持所述通信装置执行上述第一方面方法中收发数据、信令或信息，例如，发送DCI和专用导频信号。
可选的，该通信装置可以是一种网络设备，也可是网络设备中的一部分装置，例如网络设备中的芯片***。可选的，所述芯片***，用于支持网络设备实现上述方面中所涉及的功能，例如，分配，发送，或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，所述芯片***还包括存储器，所述存储器，用于保存网络设备必要的程序指令和数据。该芯片***，包括芯片，也可以包括其他分立器件或电路结构。
第八方面，提供了一种通信装置，包括处理器和存储器。该存储器用于存储程序或指令，该处理器用于从存储器中调用并运行该程序或指令，使得该通信装置执行上述第二方面中的方法。
可选的，所述通信装置还可以包括收发器，用于支持所述通信装置执行上述第二方面方法中收发数据、信令或信息，例如，接收DCI和专用导频信号。
可选的，该通信装置可以是一种终端设备，也可是终端设备中的一部分装置，例如终端设备中的芯片***。可选的，所述芯片***，用于支持终端设备实现上述方面中所涉及的功能，例如，接收，或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，所述芯片***还包括存储器，所述存储器，用于保存终端设备必要的程序指令和数据。该芯片***，包括芯片，也可以包括其他分立器件或电路结构。
第九方面，本申请提供一种计算机存储介质，计算机存储介质中存储有指令，当指令在计算机上运行时，使得计算机实现如第一方面、第一方面的可选方式、第二方面或第二 方面的可选方式所述的DCI的传输方法。
第十方面，本申请提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机实现如第一方面、第一方面的可选方式、第二方面或第二方面的可选方式所述的DCI的传输方法。
第十一方面，本申请提供一种通信***，包括如第三方面或第三方面的任一可选方式所述的网络设备，和如第四方面或第四方面的任意可选方式所述的终端设备；或者，包括如第五方面所述的网络设备，和如第六方面所述的终端设备；或者，包括如第七方面或第七方面的任一可选方式所述的通信装置，和如第八方面或第八方面的任意可选方式所述的通信装置。
附图说明
图1为本申请提供的一种通信***框图；
图2为现有技术中REG的分配方式示意图；
图3为现有技术中REG的分布情况示意图；
图4为本申请提供的一种DCI的传输方法的一个实施例的流程示意图；
图5A为本申请提供的一种REG的交织示意图一；
图5B为本申请提供的一种REG的交织示意图二；
图6A为本申请提供的一种CCE的交织示意图一；
图6B为本申请提供的一种CCE的交织示意图二；
图7为本申请提供的一种DCI和DMRS在一个REG中的承载情况示意图；
图8为本申请提供的一种网络设备的结构示意图；
图9为本申请提供的一种终端设备的结构示意图；
图10为本申请提供的一种通信装置的结构示意图。
具体实施方式
首先，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。
其次，本申请提供的DCI的传输方法可以适用于任何需要传输DCI的***中，包括长期演进(long term evolution,简称LTE)***，高级长期演进(LTE advanced，LTE-A)，或其他采用各种无线接入技术的无线通信***，例如采用码分多址，频分多址，时分多址，正交频分多址、载波聚合(carrier aggregation，CA)等接入技术的***。此外，还可以适用于使用后续的演进***，如第五代5G***等。
示例性的，如图1所示，本申请提供的DCI的传输方法可以应用于包括至少一个网络设备和至少一个终端设备的通信***中。其中，网络设备可以是一种部署在无线接入网中用以为终端设备提供无线通信功能的装置，例如基站(base station,BS)或者基站发送设备(base transceiver station，BTS)。在采用不同的无线接入技术的***中，具备基站功能的设备的名称可能会有所不同，例如在LTE网络中，称为演进的节点B(evolved NodeB，eNB或者eNodeB),在第三代通信(3G)网络中，称为节点B(Node B),或者应用于第五代通信***中具备基站功能的设备等等。为方便描述，本申请中，上面提到的具备 基站功能的设备统称为网络设备。
本申请所涉及到的终端设备可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备、智能手机、智能手表、平板电脑等,以及各种形式的用户设备(user equipment，UE)等等。为方便描述，本申请中，上面提到的设备统称为终端设备。
网络设备在为终端设备分配REG时，通常按照REG的序号依次分配。例如，网络设备为该终端设备分配的第一个REG的序号为j，分配的REG的总个数为p，那么该p个REG的序号依次为j，j+1，j+2，……，j+p-1。假设一个子帧中PDCCH区域内REG的总个数为J个，如图2所示，该p个REG按照所序号顺序排列。
网络设备将该p个REG输入交织器中，该交织器的列数为N，行数为
Figure PCTCN2018089365-appb-000001
，其中
Figure PCTCN2018089365-appb-000002
表示上取整操作。交织器将该p个REG按行映射为
Figure PCTCN2018089365-appb-000003
行，N列的矩阵中，然后将该矩阵按照预设规则进行行列交换，然后按照矩阵的列的顺序输出交织器，完成到频域的映射。那么在频域上，该p个REG呈离散的状态分布在PDCCH区域中。而该p个REG按照序号顺序每9个划分为一个CCE，因此，每个CCE中的各个REG在频域上也是离散的。
示例性的，如图3所示，在一个子帧中，网络设备分配给终端设备的3个REG(如图3所示线圈圈出的4个RE构成一个REG)在频域上和时域上都是离散状态分布。这就导致终端设备在进行信道估计时，只能采用每个REG上承载的DMRS对单独的REG进行信道估计，因此信道估计的准确率较低，进而影响对该REG上承载的DCI的解调。
为此，本申请提供一种DCI的传输方法，网络设备为终端设备分配的P个REG中，至少包括M个REG组，且每个REG组中包括的K个REG在频域上所占的资源连续，以使得终端设备可以根据每个REG组上承载的专用导频信号对相应的REG组进行信道估计，提高信道估计的准确率，从而提高对每个REG组上承载的DCI的解调的正确率。
如图4所示，为本申请提供的一种DCI的传输方法的一个实施例的流程示意图，该方法包括：
步骤401，网络设备为终端设备分配P个REG，该P个REG包括M个REG组，该M个REG组中的每个REG组包括K个REG，该K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数。
在本申请中，一个REG包括一个正交频分复用(orthogonal frequency division multiplexing，OFDM)符号上，除了承载小区专用参考信号(cell-specific reference signals,CRS)的RE之外，连续的n个资源元素(resource element，RE)，n＞1，n整数。
网络设备在为终端设备分配PDCCH时，可以采用分组的方式为终端设备分配REG。即网络设备为终端设备分配的构成PDCCH的P个REG中至少包括M个REG组，且每个REG组包括在频域上所占的资源连续的K个REG。
其中，每个REG组包含的K个REG在频域上所占的资源连续，是指除了承载物理控制信道格式指示信道(physical control format indication channel，PCFICH)、物理混合自适应重传指示信道(physical HARQ indication channel，PHICH)以及CRS的RE之外，K个REG之间不存在承载其他信道的RE。也就是说，每个REG组中的K个REG可以是依次相邻的，也可以个隔着承载PCFICH、PHICH和/或CRS的RE依次相邻的。
示例性的，网络设备可以按照预设的序号规则来分配P个REG。例如，M个REG组中 第m个REG组中的各个REG的序号依次为{i m，i m+N，……，i m+(K-1)N},i m表示第m个REG组中的第一个REG的序号，N表示对P个REG进行交织处理的交织器的列数，i m≥0，1≤m≤M，m和i均为正整数。
示例性的，假设m＝2，i m＝3，N＝32，K＝3，一个子帧中PDCCH区域内REG的总个数为J个。网络设备将第2个REG组中的3个REG(序号依次为3,35,67)输入交织器后，交织器将该3个REG按行映射到
Figure PCTCN2018089365-appb-000004
行，32列的矩阵中。如图5A所示，该3个REG在
Figure PCTCN2018089365-appb-000005
行，32列的矩阵，在一列上是相邻的。因此按照列输出，映射到频域上时，该3个REG则是连续的。
可选的，第m个REG组中第一个REG的序号i m满足：i m＝i 1+m-1，i 1表示第1个REG组中的第一个REG的序号。也就是说，M个REG组中的第一个REG的序号是连续的。
示例性的，基于如图5A所示的示例，如图5B所示，i 1＝2，第1个REG组的3个REG的序号依次为2,34,66。映射到
Figure PCTCN2018089365-appb-000006
行，32列的矩阵中后，第1个REG组的3个REG在一列上是也是相邻的。因此按照列输出，映射到频域上时，第1个REG组的3个REG也是连续的。
可以理解的是，每个REG组中的第一个REG的序号也可以是没有规律的，例如i 1＝1，i 2＝5，i 3＝6……。只要保证该M个REG组中的每个REG组中的K个REG的序号依次相差N即可。
在一个示例中，当P＞MK时，P个REG还包括第M+1个REG组，第M+1个REG组包括P-MK个REG，第M+1个REG组中的各个REG的序号依次为{i M+1，i M+1+N，……，i M+1+(P-MK-1)N}，P-MK＜K。
在本申请中，该P个REG可以至少被划分为B(B≥1，B为整数)个CCE。
在一个示例中，M个REG组可以包括至少B个CCE，每一个CCE由L(L≥1，L为整数)个REG组构成，而不是由序号连续的多个REG构成，M≥BL。假设以一个CCE包括9个REG为例，那么当K＝3时，L＝3，即一个CCE包括3个REG组。示例性的，网络设备为终端设备分配了21个REG，共7个REG组，每个REG组包括3个在频域上所占的资源连续的REG。该30个REG通过交织器映射后的分布可以如图6A所示，第1-3个REG组构成一个CCE(假设为CCE1)，第4-6组构成一个CCE(假设为CCE2)。在该示例中，每个CCE中的REG，每K个REG在频域上所占的资源连续。
可选的，每个REG组中的K个REG可以分别属于K个CCE中。示例性的，一个CCE包括9个REG为例，假设P＝18，M＝9，K＝2。该18个REG通过交织器映射后的分布可以如图6B所示。其中，该9个REG中的2个REG都分别属于CCE3和CCE4。在该示例中，每个CCE中的REG虽然在频域上所占的资源不连续，但每个CCE中的每个REG都与另一CCE中的一个REG在在频域上所占的资源是连续的。
在本申请中，K的取值可以是预设的固定值，也可以由高层信令指示。例如，由无线资源控制(radio resource control，RRC)信令或者多媒体接入控制单元(media access control-control element，MAC-CE)指示。
步骤402，网络设备在P个REG上发送DCI和专用导频信号，专用导频信号承载在P个REG中每一个REG的至少一个RE上。
可以理解的是，每个REG上通过一个指定的RE用来承载终端设备的专用导频信号， 剩余的剩余的RE上用来承载终端设备的DCI。
示例性的，如图7所示，假设该终端设备的专用导频信号为该终端设备的DMRS，一个REG包含连续的4个RE，其中一个RE承载了DMRS，剩余的三个RE分别承载了该终端设备的一部分DCI。
网络设备在该P个REG上发送DCI和专用导频信号时，可以采用该终端设备特定的波束赋形权值来发送。其中，波束赋形权值为网络设备在A(A≥1，A为整数)个天线端口上发送专用导频信号和DCI时所采用的乘积因子。网络设备通过终端设备特定的波束赋形权值发送DCI和专用导频信号，可以使得DCI和DMRS的能量集中该终端设备所在位置，提高终端设备接收的DCI和DMRS的信号质量。
示例性的，对于每个REG组中的K个REG，网络设备可以在K个REG上采用相同的波束赋形权值发送专用导频信号和DCI。而对于M个REG组或者M+1个REG组之间，网络设备可以在M个REG组或者M+1个REG组上采用相同或者不同的波束赋形权值。
需要说明的是，网络设备采用的波束赋形权值的具体数值针对不同的终端设备可能是不同的，为某个终端设备所采用的波束赋形权值一般都是该终端设备特定的，对该终端设备来说性能较好的权值。
相应的，终端设备在该P个REG上接收DCI和专用导频信号之前，需要根据与网络设备相对应的发送规则，假设网络设备采用波束赋形权值。
例如，对于每个REG组中的K个REG，假设网络设备在该K个REG上采用相同的波束赋形权值发送专用导频信号和DCI。对于M个REG组，假设网络设备在M个REG组上采用不同或者相同的波束赋形权值发送专用导频信号和DCI。
步骤403，终端设备采用每个REG组上承载的K个专用导频信号，对相应的REG组进行信道估计，获取M个REG组的信道估计结果。
由于网络设备在为终端设备分配PDCCH时，是以分组的方式分配至少M个REG组，且每个REG组中包括的K个REG在频域上所占的资源连续。因此，终端设备在进行信道估计时，可以对每个REG组进行信道估计。对于该M组中的每个REG组，由于K个REG在频域上所占的资源连续，因此终端设备可以采用该REG组上承载专用导频信号对该REG组进行信道估计，获取该REG组的信道估计结果，而不是对单独的一个REG进行信道估计，提高了信道估计结果的正确率。
步骤404，终端设备根据M个REG组的信道估计结果，对该M个REG组上承载的DCI进行处理。
当终端设备获取到该M个REG组的信道估计结果时，即可利用相应的信道估计结果分别对该M个REG组上承载的DCI进行处理，包括解调处理，译码处理等。
可以理解的是，当P＞MK时，对于第M+1个REG组中的P-MK个REG，若P-MK＞1，终端设备同样可以对第M+1个REG组进行信道估计，并利用信道估计结果对第M+1个REG组上承载的部分DCI进行处理。
采用本申请提供的方法，由于网络设备为终端设备分配的P个REG中，至少包括M个REG组，且每个REG组中包括的K个REG在频域上所占的资源连续，因此，终端设备可以根据每个REG组上承载的K个专用导频信号对相应的REG组进行信道估计，提高信道估计的准确率，从而提高对每个REG组上承载的DCI的解调的正确率。
上述主要从各个网元之间交互的角度对本申请提供的方案进行了介绍。可以理解的是，终端设备以及网络设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
如图8所示，为本申请提供的一种网络设备一种可能的结构示意图，该网络设备包括：
分配单元801，用于为终端设备分配P个REG，所述P个REG包括M个REG组，所述M个REG组中的每个REG组包括K个REG，所述K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数。
发送单元802，用于在所述分配单元801分配的所述P个REG上发送DCI和专用导频信号，所述专用导频信号承载在所述P个REG中每一个REG的一个RE上。
可选的，所述K个REG在频域上所占的资源连续，包括：除了承载PCFICH、PHICH以及小区专用参考信号CRS的RE之外，所述K个REG之间不存在承载其他信道的RE。
可选的，所述M个REG组中第m个REG组中的各个REG的序号依次为{i m，i m+N，……，i m+(K-1)N},i m表示所述第m个REG组中的第一个REG的序号，N表示对所述P个REG进行交织处理的交织器的列数，i m≥0，1≤m≤M，m和i均为正整数。
可选的，第m个REG组中第一个REG的序号i m满足：i m＝i 1+m-1，i 1表示第1个REG组中的第一个REG的序号。
可选的，当P＞MK时，所述P个REG还包括第M+1个REG组，所述第M+1个REG组包括P-MK个REG，所述第M+1个REG组中的各个REG的序号依次为{i M+1，i M+1+N，……，i M+1+(P-MK-1)N}，P-MK＜K。
可选的，所述K的取值由无线资源控制RRC信令指示。
可选的，所述M个REG组包括B个控制信道单元CCE，所述B个CCE中的每个CCE包括L个所述REG组，M≥BL，L≥1，B≥1，B和L均为整数。
可选的，所述M个REG组包括B个控制信道单元CCE，所述K个REG分别属于所述B个CCE中的K个CCE。
如图9所示，为本申请提供的一种终端设备一种可能的结构示意图，该终端设备包括：
接收单元901，用于在P个REG上接收网络设备发送的专用导频信号和DCI，所述专用导频信号承载在所述P个REG中的每个REG的一个RE上，所述P个REG包括M个REG组，所述M个REG组中的每个REG组包括K个REG，所述K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数；
处理单元902，用于采用所述每个REG组上承载的K个所述专用导频，对相应的REG组进行联合信道估计，获取所述M个REG组的信道估计结果；
所述处理单元902，还用于根据所述M个REG组的信道估计结果，对所述M个REG组上承载的所述DCI进行处理。
可选的，所述处理单元902，还用于在所述接收单元901在P个REG上接收网络设备发送的专用导频信号和DCI之前，对于所述每个REG组中的K个REG，假设所述网络设备 在所述K个REG上采用相同的波束赋形权值发送所述专用导频信号和所述DCI。
可选的，所述处理单元901，还用于对于所述M个REG组，假设所述网络设备在所述M个REG组上采用不同的波束赋形权值发送所述专用导频信号和所述DCI。
可选的，所述K个REG在频域上所占的资源连续，包括：除了PCFICH、PHICH以及CRS的RE之外，所述K个REG之间不存在承载其他信道的RE。
可选的，所述M个REG组中第m个REG组中的各个REG的序号依次为{i m，i m+N，……，i m+(K-1)N},i m表示所述第m个REG组中的第一个REG的序号，N表示对所述P个REG进行交织处理的交织器的列数，i m≥0，1≤m≤M，m和i均为正整数。
可选的，第m个REG组中第一个REG的序号i m满足：i m＝i 1+m-1，i 1表示第1个REG组中的第一个REG的序号。
可选的，当P＞MK时，所述P个REG还包括第M+1个REG组，所述第M+1个REG组包括P-MK个REG，所述第M+1个REG组中的各个REG的序号依次为{i M+1，i M+1+N，……，i M+1+(P-MK-1)N}，P-MK＜K。
可选的，所述K的取值由无线资源控制RRC信令指示。
可选的，所述M个REG组包括B个控制信道单元CCE，所述B个CCE中的每个CCE包括L个所述REG组，M≥BL，L≥1，B≥1，B和L均为整数。
可选的，所述M个REG组包括B个控制信道单元CCE，所述K个REG分别属于所述B个CCE中的K个CCE。
如图10所示，为本申请提供的一种通信装置的结构示意图，包括处理器1001和存储器1002。
其中，处理器1001可以是中央处理器(central processing unit，CPU)，通用处理器1001，数字信号处理器(digital signal processor，DSP)，专用集成电路(application-Specific integrated circuit，ASIC)，现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器1001也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。
可选的，所述通信装置还可以包括收发器1003，用于支持所述通信装置执行上述数据传输方法中收发数据、信令或信息，例如，接收或者发送DCI和专用导频信号。
所述处理器1001、收发器1003和存储器1002之间通过总线1004相互连接；总线1004可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述总线1004可以分为地址总线、数据总线、控制总线等。为便于表示，图10中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
可选的，该通信装置可以是一种网络设备，也可是网络设备中的一部分装置，例如网络设备中的芯片***。可选的，所述芯片***，用于支持网络设备实现上述方面中所涉及的功能，例如，分配，发送，或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，所述芯片***还包括存储器，所述存储器，用于保存网络设备必要的程序指令和数据。该芯片***，包括芯片，也可以包括其他分立器件或电路结构。
所述处理器1001用于与存储器1002耦合，读取并执行所述存储器1002中的指令，以实现如图4所示方法实施例中网络设备所执行的步骤。具体可以参见上述如图4所示方法实施例中相关的描述，此处不再赘述。
可选的，该通信装置可以是一种终端设备，也可是终端设备中的一部分装置，例如终端设备中的芯片***。可选的，所述芯片***，用于支持终端设备实现上述方面中所涉及的功能，例如，接收，或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，所述芯片***还包括存储器，所述存储器，用于保存终端设备必要的程序指令和数据。该芯片***，包括芯片，也可以包括其他分立器件或电路结构。
当该通信装置是一种终端设备，或者终端设备中的一部分装置时，所述处理器1001用于与存储器1002耦合，读取并执行所述存储器1002中的指令，以实现如图4所示方法实施例中终端设备所执行的步骤。具体可以参见上述如图4所示方法实施例中相关的描述，此处不再赘述。
在一个示例中，结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(random access memory，RAM)、闪存、只读存储器(read only memory，ROM)、可擦除可编程只读存储器(erasable programmable ROM，EPROM)、电可擦可编程只读存储器(electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于核心网接口设备中。当然，处理器和存储介质也可以作为分立组件存在于核心网接口设备中。
具体实现中，本申请还提供一种计算机存储介质，其中，该计算机存储介质可存储有程序，该程序执行时可包括本申请提供的DCI的传输方法的各实施例中的部分或全部步骤。所述的存储介质可为磁碟、光盘、只读存储记忆体(英文：read-only memory，简称：ROM)或随机存储记忆体(英文：random access memory，简称：RAM)等。
本申请还提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述本申请提供的数据传输方法的各实施例中的部分或全部步骤。
本领域的技术人员可以清楚地了解到本申请中的技术可借助软件加必需的通用硬件平台的方式来实现。基于这样的理解，本申请中的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品可以存储在存储介质中，如ROM/RAM、磁碟、光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者VPN网关等)执行本发明各个实施例或者实施例的某些部分所述的方法。
以上所述的本发明实施方式并不构成对本发明保护范围的限定。

Claims (38)

  1. 一种下行控制信号DCI的传输方法，其特征在于，所述方法包括：
    为终端设备分配P个资源组REG，所述P个REG包括M个REG组，所述M个REG组中的每个REG组包括K个REG，所述K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数；
    在所述P个REG上发送DCI和专用导频信号，所述专用导频信号承载在所述P个REG中每一个REG的至少一个资源单元RE上。
  2. 根据权利要求1所述的方法，其特征在于，所述K个REG在频域上所占的资源连续，包括：
    除了承载物理控制信道格式指示信道PCFICH、物理混合自适应重传指示信道PHICH以及小区专用参考信号CRS的RE之外，所述K个REG之间不存在承载其他信道的RE。
  3. 根据权利要求1或2所述的方法，其特征在于，所述M个REG组中第m个REG组中的各个REG的序号依次为{i m，i m+N，……，i m+(K-1)N},i m表示所述第m个REG组中的第一个REG的序号，N表示对所述P个REG进行交织处理的交织器的列数，i m≥0，1≤m≤M，m和i均为正整数。
  4. 根据权利要求3所述的方法，其特征在于，第m个REG组中第一个REG的序号i m满足：i m＝i 1+m-1，i 1表示第1个REG组中的第一个REG的序号。
  5. 根据权利要求3或4所述的方法，其特征在于，当P＞MK时，所述P个REG还包括第M+1个REG组，所述第M+1个REG组包括P-MK个REG，所述第M+1个REG组中的各个REG的序号依次为{i M+1，i M+1+N，……，i M+1+(P-MK-1)N}，P-MK＜K。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述K的取值由无线资源控制RRC信令或者媒体接入控制单元MAC-CE指示。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述M个REG组包括B个控制信道单元CCE，所述B个CCE中的每个CCE包括L个所述REG组，M≥BL，L≥1，B≥1，B和L均为整数。
  8. 根据权利要求1-6任一项所述的方法，其特征在于，所述M个REG组包括B个控制信道单元CCE，所述K个REG分别属于所述B个CCE中的K个CCE。
  9. 一种下行控制信号DCI的传输方法，其特征在于，所述方法包括：
    在P个资源组REG上接收网络设备发送的专用导频信号和DCI，所述专用导频信号承载在所述P个REG中的每个REG的至少一个资源单元RE上，所述P个REG包括M个REG组，所述M个REG组中的每个REG组包括K个REG，所述K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数；
    采用所述每个REG组上承载的所述专用导频信号，对相应的REG组进行信道估计，获取所述M个REG组的信道估计结果；
    根据所述M个REG组的信道估计结果，对所述M个REG组上承载的所述DCI进行处理。
  10. 根据权利要求9所述的方法，其特征在于，所述在P个REG上接收网络设备发送的专用导频信号和DCI之前，所述方法还包括：
    对于所述每个REG组中的K个REG，假设所述网络设备在所述K个REG上采用相同的波束赋形权值发送所述专用导频信号和所述DCI。
  11. 根据权利要求10所述的方法，其特征在于，
    对于所述M个REG组，假设所述网络设备在所述M个REG组上采用不同的波束赋形权值发送所述专用导频信号和所述DCI。
  12. 根据权利要求9-11任一项所述的方法，其特征在于，所述K个REG在频域上所占的资源连续，包括：
    除了承载物理控制信道格式指示信道PCFICH、物理混合自适应重传指示信道PHICH以及小区专用参考信号CRS的RE之外，所述K个REG之间不存在承载其他信道的RE。
  13. 根据权利要求9-12任一项所述的方法，其特征在于，所述M个REG组中第m个REG组中的各个REG的序号依次为{i m，i m+N，……，i m+(K-1)N},i m表示所述第m个REG组中的第一个REG的序号，N表示对所述P个REG进行交织处理的交织器的列数，i m≥0，1≤m≤M，m和i均为正整数。
  14. 根据权利要求13所述的方法，其特征在于，第m个REG组中第一个REG的序号i m满足：i m＝i 1+m-1，i 1表示第1个REG组中的第一个REG的序号。
  15. 根据权利要求11或12所述的方法，其特征在于，当P＞MK时，所述P个REG还包括第M+1个REG组，所述第M+1个REG组包括P-MK个REG，所述第M+1个REG组中的各个REG的序号依次为{i M+1，i M+1+N，……，i M+1+(P-MK-1)N}，P-MK＜K。
  16. 根据权利要求9-15任一项所述的方法，其特征在于，所述K的取值由无线资源控制RRC信令或者媒体接入控制单元MAC-CE指示。
  17. 根据权利要求9-16任一项所述的方法，其特征在于，所述M个REG组包括B个控制信道单元CCE，所述B个CCE中的每个CCE包括L个所述REG组，M≥BL，L≥1，B≥1，B和L均为整数。
  18. 根据权利要求9-16任一项所述的方法，其特征在于，所述M个REG组包括B个控制信道单元CCE，所述K个REG分别属于所述B个CCE中的K个CCE。
  19. 一种网络设备，其特征在于，包括：
    分配单元，用于为终端设备分配P个资源组REG，所述P个REG包括M个REG组，所述M个REG组中的每个REG组包括K个REG，所述K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数；
    发送单元，用于在所述分配单元分配的所述P个REG上发送下行控制信息DCI和专用导频信号，所述专用导频信号承载在所述P个REG中每一个REG的至少一个资源单元RE上。
  20. 根据权利要求19所述的网络设备，其特征在于，所述K个REG在频域上所占的资源连续，包括：
    除了承载物理控制信道格式指示信道PCFICH、物理混合自适应重传指示信道PHICH以及小区专用参考信号CRS的RE之外，所述K个REG之间不存在承载其他信道的RE。
  21. 根据权利要求19或20所述的网络设备，其特征在于，所述M个REG组中第 m个REG组中的各个REG的序号依次为{i m，i m+N，……，i m+(K-1)N},i m表示所述第m个REG组中的第一个REG的序号，N表示对所述P个REG进行交织处理的交织器的列数，i m≥0，1≤m≤M，m和i均为正整数。
  22. 根据权利要求21所述的网络设备，其特征在于，第m个REG组中第一个REG的序号i m满足：i m＝i 1+m-1，i 1表示第1个REG组中的第一个REG的序号。
  23. 根据权利要求21或22所述的网络设备，其特征在于，当P＞MK时，所述P个REG还包括第M+1个REG组，所述第M+1个REG组包括P-MK个REG，所述第M+1个REG组中的各个REG的序号依次为{i M+1，i M+1+N，……，i M+1+(P-MK-1)N}，P-MK＜K。
  24. 根据权利要求19-23任一项所述的网络设备，其特征在于，所述K的取值由无线资源控制RRC信令或者媒体接入控制单元MAC-CE指示。
  25. 根据权利要求19-24任一项所述的网络设备，其特征在于，所述M个REG组包括B个控制信道单元CCE，所述B个CCE中的每个CCE包括L个所述REG组，M≥BL，L≥1，B≥1，B和L均为整数。
  26. 根据权利要求19-24任一项所述的网络设备，其特征在于，所述M个REG组包括B个控制信道单元CCE，所述K个REG分别属于所述B个CCE中的K个CCE。
  27. 一种终端设备，其特征在于，包括：
    接收单元，用于在P个资源组REG上接收网络设备发送的专用导频信号和下行控制信号DCI，所述专用导频信号承载在所述P个REG中的每个REG的至少一个资源单元RE上，所述P个REG包括M个REG组，所述M个REG组中的每个REG组包括K个REG，所述K个REG在频域上所占的资源连续，M≥1，K≥2，P≥MK，M和K均为整数；
    处理单元，用于采用所述每个REG组上承载的所述专用导频信号，对相应的REG组进行信道估计，获取所述M个REG组的信道估计结果；
    所述处理单元，还用于根据所述M个REG组的信道估计结果，对所述M个REG组上承载的所述DCI进行处理。
  28. 根据权利要求27所述的终端设备，其特征在于，
    所述处理单元，还用于在所述接收单元在P个REG上接收网络设备发送的专用导频信号和DCI之前，对于所述每个REG组中的K个REG，假设所述网络设备在所述K个REG上采用相同的波束赋形权值发送所述专用导频信号和所述DCI。
  29. 根据权利要求28所述的终端设备，其特征在于，
    所述处理单元，还用于对于所述M个REG组，假设所述网络设备在所述M个REG组上采用不同的波束赋形权值发送所述专用导频信号和所述DCI。
  30. 根据权利要求27-29任一项所述的终端设备，其特征在于，所述K个REG在频域上所占的资源连续，包括：
    除了承载物理控制信道格式指示信道PCFICH、物理混合自适应重传指示信道PHICH以及小区专用参考信号CRS的RE之外，所述K个REG之间不存在承载其他信道的RE。
  31. 根据权利要求27-30任一项所述的终端设备，其特征在于，所述M个REG组中第m个REG组中的各个REG的序号依次为{i m，i m+N，……，i m+(K-1)N},i m表示 所述第m个REG组中的第一个REG的序号，N表示对所述P个REG进行交织处理的交织器的列数，i m≥0，1≤m≤M，m和i均为正整数。
  32. 根据权利要求31所述的终端设备，其特征在于，第m个REG组中第一个REG的序号i m满足：i m＝i 1+m-1，i 1表示第1个REG组中的第一个REG的序号。
  33. 根据权利要求31或32所述的终端设备，其特征在于，当P＞MK时，所述P个REG还包括第M+1个REG组，所述第M+1个REG组包括P-MK个REG，所述第M+1个REG组中的各个REG的序号依次为{i M+1，i M+1+N，……，i M+1+(P-MK-1)N}，P-MK＜K。
  34. 根据权利要求27-33任一项所述的终端设备，其特征在于，所述K的取值由无线资源控制RRC信令或者媒体接入控制单元MAC-CE指示。
  35. 根据权利要求27-34任一项所述的终端设备，其特征在于，所述M个REG组包括B个控制信道单元CCE，所述B个CCE中的每个CCE包括L个所述REG组，M≥BL，L≥1，B≥1，B和L均为整数。
  36. 根据权利要求27-34任一项所述的终端设备，其特征在于，所述M个REG组包括B个控制信道单元CCE，所述K个REG分别属于所述B个CCE中的K个CCE。
  37. 一种计算机存储介质，其特征在于，所述计算机存储介质中存储有指令，当所述指令在计算机上运行时，使得计算机实现如权利要求1-8任一项所述的下行控制信息DCI的传输方法。
  38. 一种计算机存储介质，其特征在于，所述计算机存储介质中存储有指令，当所述指令在计算机上运行时，使得计算机实现如权利要求9-18任一项所述的下行控制信息DCI的传输方法。
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