WO2017173961A1 - 一种确定dmrs的端口映射的方法、基站和终端 - Google Patents

一种确定dmrs的端口映射的方法、基站和终端 Download PDF

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Publication number
WO2017173961A1
WO2017173961A1 PCT/CN2017/079127 CN2017079127W WO2017173961A1 WO 2017173961 A1 WO2017173961 A1 WO 2017173961A1 CN 2017079127 W CN2017079127 W CN 2017079127W WO 2017173961 A1 WO2017173961 A1 WO 2017173961A1
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Prior art keywords
terminal
mapping
dmrs
port
dmrs port
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PCT/CN2017/079127
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English (en)
French (fr)
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刘建琴
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, a base station, and a terminal for determining a port mapping of a demodulation reference signal (English: Demodulation Reference Signal, DMRS for short).
  • a demodulation reference signal English: Demodulation Reference Signal, DMRS for short.
  • the base station can beamform the enhanced control channel to improve coverage and performance of the enhanced control channel transmission.
  • Beamforming technology enhances the signal at a specific angle and attenuates the signal at another specific angle, enabling spatial selectivity at both the transmitting and receiving ends.
  • the transmission of the enhanced control channel can be performed based on a plurality of analog beams, wherein each analog beam corresponds to one virtual cell of the enhanced control channel, and each virtual cell corresponds to a spatial beam.
  • Different analog beams correspond to different virtual cells, that is, different analog beams correspond to different spatial beams. Therefore, when terminal pairs with different analog beams are used, the beam discrimination is higher, and the interference between the paired terminals is smaller.
  • the transmission of the enhanced control channel under the analog beam 1 is based on the spatial beam corresponding to the analog beam 1
  • the transmission of the enhanced control channel under the analog beam 2 is based on the spatial beam corresponding to the analog beam 2.
  • terminal 1 and terminal 2 use different beamlets under analog beam 1
  • terminal 3 uses beamlets under analog beam 2. Because the direction of the beamlets used by the terminal 1 and the terminal 2 are similar, it is easy to cause interference when performing multi-terminal transmission of the enhanced control channel. Therefore, the terminal pairing composed of the terminal 1 and the terminal 2 is worse than the terminal 1 and the terminal 3. Terminal pairing.
  • the port mapping method of the DMRS corresponding to the enhanced control channel can be expressed as follows:
  • n' represents the mapping number of the DMRS port of the terminal
  • n ECCE, low is the lowest enhanced control channel unit corresponding to the enhanced physical downlink control channel (English: Enhanced-Physical Downlink Control Channel, EPDCCH).
  • Enhanced Control Channel Element (ECCE) number, n RNTI is the radio network temporary identifier of the terminal (English: Radio Network Temporary Identity, RNTI for short).
  • the number of ECCEs included in each physical resource block (English: Physical Resource Block, PRB for short).
  • two terminals corresponding to different analog beams are likely to be mapped to the same DMRS port.
  • the present application provides a method, a base station, and a terminal for determining a port mapping of a DMRS.
  • a first aspect of the present application provides a method for determining a port mapping of a DMRS, including:
  • the base station determines an index of a beam corresponding to the terminal
  • the base station sends a DMRS to the terminal according to the port mapping of the DMRS.
  • a second aspect of the present application provides a method for determining a port mapping of a DMRS, including:
  • the terminal receives the DMRS sent by the base station according to the port mapping of the DMRS.
  • a base station having a function of implementing the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules or units corresponding to the functions described above.
  • the base station includes a processing unit and a sending unit;
  • the processing unit is configured to determine an index of a beam corresponding to the terminal, and determine a mapping number of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port; Determining a mapping number of the DMRS port of the terminal, and determining a port mapping of the DMRS of the terminal;
  • the sending unit is configured to send a DMRS to the terminal according to the port mapping of the DMRS.
  • the base station includes a processor and a transmitter, and the transmitter and the processor are connected to each other through a bus system;
  • the processor is configured to determine an index of a beam corresponding to the terminal, and determine a mapping number of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port; Determining a mapping number of the DMRS port of the terminal, and determining a port mapping of the DMRS of the terminal;
  • the transmitter is configured to send a DMRS to the terminal according to the port mapping of the DMRS.
  • a terminal having a function of implementing the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules or units corresponding to the functions described above.
  • the terminal includes a processing unit and a receiving unit;
  • the processing unit is configured to determine an index of a beam corresponding to the terminal, and determine a mapping number of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port. Determining, according to the determined mapping number of the DMRS port of the terminal, a port mapping of the DMRS of the terminal;
  • the receiving unit is configured to receive, according to the port mapping of the DMRS, a DMRS sent by a base station.
  • the terminal includes a processor and a receiver, and the receiver and the processor are connected to each other through a bus system;
  • the processor is configured to determine an index of a beam corresponding to the terminal, and determine a mapping number of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port. Determining, according to the determined mapping number of the DMRS port of the terminal, a port mapping of the DMRS of the terminal;
  • the receiver is configured to receive, according to the port mapping of the DMRS, a DMRS sent by a base station.
  • mapping number of the DMRS port of the terminal satisfies the following formula:
  • the RNTI is an RNTI of the terminal; The number of ECCEs used for EPDCCH transmission of the terminal; The number of ECCEs included for each PRB; C is a positive integer.
  • the base station determines the mapping number of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port, including:
  • the base station determines a mapping number of the DMRS port of the terminal according to an index of a beam corresponding to the terminal and a total number of candidate beams of the terminal.
  • mapping number of the DMRS port of the terminal satisfies the following formula:
  • n ' is the terminal DMRS port number mapping; n BI index a beam corresponding to the terminal, n BI ⁇ 0; candidate total number of beams N BI to the terminal, N BI ⁇ n BI; n ECCE,low is the lowest ECCE number corresponding to the EPDCCH transmission of the terminal; n RNTI is the RNTI of the terminal; The number of ECCEs used for EPDCCH transmission of the terminal; The number of ECCEs included for each PRB.
  • the port mapping of the DMRS is performed in combination with the beam information corresponding to the terminal, thereby improving the possibility that the terminals corresponding to different beams are mapped to different DMDRS ports, and the success of the enhanced control channel for multi-user transmission is also improved. rate.
  • 1 is a schematic diagram of transmission of an enhanced control channel to which beamforming is applied in the prior art
  • FIG. 2 is a schematic diagram of a system for determining a method for determining port mapping of a DMRS according to the present application
  • FIG. 3 is a flowchart of determining, by a base station, a port mapping of a DMRS according to the present application
  • FIG. 4 is a flowchart of determining, by a terminal, a port mapping of a DMRS according to the present application
  • FIG. 5 is a schematic structural diagram of a base station provided by the present application.
  • FIG. 6 is a schematic structural diagram of a terminal provided by the present application.
  • FIG. 7 is a schematic structural diagram of another base station provided by the present application.
  • FIG. 8 is a schematic structural diagram of another terminal provided by the present application.
  • Terminal pairing refers to a base station transmitting data of two terminals simultaneously on the same time-frequency resource, so that multiple single-antenna terminals can form a terminal group to form a virtual multiple input with a multi-antenna base station in the same time-frequency resource block.
  • Multiple output system (English: Multiple-Input Multiple-Output, MIMO for short).
  • Analog beam refers to a beam formed by applying a complex-valued weighting coefficient on a R (R > 1) antenna element according to a phase shifter.
  • the total number of candidate beams of the terminal refers to the total number of all candidate beams of the terminal.
  • the total number of candidate beams of all the terminals in a cell is the same.
  • each wide beam in the figure corresponds to one candidate beam, and the total number of candidate beams in the figure is 2.
  • the lower limit of the total number of candidate beams of the terminal is 1.
  • the two terminals that make up the terminal pairing correspond to different beams
  • the two terminals need to be mapped to different DMRS ports.
  • the DMRS of terminal 1 If the port mapping is DMRS port 7, the port mapping of the DMRS of terminal 3 needs to be different from other DMRS ports of DMRS port 7, such as DMRS port 8.
  • the port mapping method of the current DMRS is only related to the lowest ECCE number of the terminal, the RNTI of the terminal, the aggregation level of the terminal, and the like, and is independent of the beam information corresponding to the terminal. Therefore, according to the current port mapping method of DMRS, it is random to make terminals corresponding to different beams mapped to different DMRS ports, and two terminals corresponding to different beams are likely to be mapped to the same DMRS port.
  • the present application proposes a method for determining a port mapping of a DMRS, a base station, and a terminal, and performs port mapping of the DMRS in combination with beam information corresponding to the terminal, thereby improving the possibility that terminals corresponding to different beams are mapped to different DMDRS ports.
  • Sexuality also increases the success rate of enhanced control channels for multi-user transmission.
  • the method for determining the port mapping of the DMRS provided by the present application is applicable to the wireless communication system shown in FIG. 2, including the base station 201 and the terminal 202.
  • the wireless communication system may be, but not limited to, a Wide-Band Code Division Multiple Access (WCDMA) system, a Long Term Evolution (LTE) system, and a long-term evolution.
  • WCDMA Wide-Band Code Division Multiple Access
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • 5G 5rd Generation Cellular Communication Standard
  • the base station 201 may be a macro base station (English: Macro eNodeB, abbreviated as: Macro eNB), a small base station (English: Small eNB), a micro base station (English: Micro eNB), a pico base station (English: Pico eNB), and a femto base station ( English: Femto eNB), etc., the implementation form of the base station is not limited.
  • the base station 201 is configured to determine, according to beam information corresponding to the terminal, a port mapping of the DMRS of the terminal 202, and according to the end of the DMRS. The port mapping sends a DMRS to the terminal 202.
  • the terminal 202 may also be referred to as a user equipment (English: User Equipment, UE for short), and the terminal 202 may be a mobile phone, a notebook, a tablet computer, or a car mobile device.
  • the terminal 202 is configured to determine a port mapping of the DMRS of the terminal 202 according to the beam information corresponding to the terminal 202, and receive the DMRS sent by the base station 201 according to the port mapping of the DMRS.
  • the technical solution of the present invention does not limit the transmission mode of the EPDCCH, and may be a centralized transmission mode or a discrete transmission mode.
  • the technical solution of the present invention does not limit the form of the beam, such as an analog beam, a digital beam, a hybrid beam, and the like.
  • the formula mentioned in the technical solution of the present invention is mainly based on the scenario derivation of the centralized transmission mode. To apply the technical solution of the present invention to the scenario of the discrete transmission mode, it is necessary to correlate the formula in the technical solution of the present invention. transform. Moreover, all the formulas mentioned in the technical solutions of the present invention may have more logical variants.
  • the process of determining the port mapping of the DMRS by the base station is as follows:
  • Step 301 The base station determines an index of a beam corresponding to the terminal.
  • different beams correspond to different indexes.
  • Step 302 The base station determines a mapping number of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port.
  • the base station may be implemented by using a mapping table that stores a correspondence between an index of a beam corresponding to the terminal and a mapping number of the DMRS port, or may be performed by indicating a beam corresponding to the terminal.
  • the mapping formula of the association relationship between the index and the mapping number of the DMRS port is implemented.
  • mapping number of the DMRS port of the terminal by using the mapping formula.
  • mapping formula there are three ways:
  • Manner 1 Determine the DMRS port of the terminal according to the index of the beam corresponding to the terminal, the lowest ECCE number corresponding to the EPDCCH transmission of the terminal, the number of ECCEs transmitted by the EPDCCH of the terminal, and the number of ECCEs included in each PRB. The map number.
  • Equation (2) establishes an association between the beam index of the terminal and the mapping number of the DMRS port of the terminal. With this association, the probability that the EPDCCH of the terminal corresponding to the different beam is mapped to a different DMRS port can be improved.
  • Manner 2 the index of the beam corresponding to the terminal, the RNTI of the terminal, the lowest ECCE number corresponding to the EPDCCH transmission of the terminal, the number of ECCEs transmitted by the EPDCCH of the terminal, and the number of ECCEs included in each PRB Determine the mapping number of the DMRS port of the terminal.
  • n RNTI is the RNTI of the terminal, and C is a positive integer.
  • C is a positive integer.
  • Equation (3) establishes an association relationship between the RNTI of the terminal and the mapping index of the DMRS port of the terminal, and the association relationship may be performed according to the RNTI of the terminal if the beam index corresponding to the terminal is the same.
  • the further mapping of the DMRS port improves the probability that the EPDCCHs of the terminals corresponding to different beams are mapped to different DMRS ports compared to the formula (2).
  • Manner 3 Depending on the index of the beam corresponding to the terminal, the total number of candidate beams of the terminal, the RNTI of the terminal, the lowest ECCE number corresponding to the EPDCCH transmission of the terminal, and the number of ECCEs transmitted by the EPDCCH of the terminal And the number of ECCEs included in each PRB, and the mapping number of the DMRS port of the terminal is determined.
  • N BI is the total number of candidate beams of the terminal, and the meanings of the remaining parameters can be found in formula (2) and formula (3).
  • n BI when the beam index n BI corresponding to the terminal is greater than or equal to n RNTI mod N BI , the mapping number of the DMRS port is distinguished according to n BI .
  • n BI is smaller than n RNTI mod N BI , the mapping number of the DMRS port is distinguished according to n RNTI mod N BI . Therefore, when n BI is large, the mapping of the DMRS port is performed according to n BI with a large probability.
  • N BI is the total number of candidate beams of the terminal, and the meanings of the remaining parameters can be found in formula (2) and formula (3).
  • the mapping number of the DMRS port is distinguished according to n BI .
  • n BI is greater than n RNTI mod N BI
  • the mapping number of the DMRS port is distinguished according to n RNTI mod N BI . Therefore, it can be realized that when n BI is small, the mapping of the DMRS port is performed according to n BI with a large probability.
  • the scrambling code of the beam can also be used instead of the index of the beam.
  • Step 303 The base station determines, according to the determined mapping number of the DMRS port of the terminal, a port mapping of the DMRS of the terminal.
  • mapping number of the DMRS port may be stored in advance, as shown in Table 1 below.
  • Step 304 The base station sends a DMRS to the terminal according to the port mapping of the DMRS.
  • the terminal side also needs to determine the port mapping of the corresponding DMRS, and receive the DMRS sent by the base station according to the determined port mapping of the DMRS.
  • the process of determining the port mapping of the DMRS by the terminal is as follows:
  • Step 401 The terminal determines an index of a beam corresponding to the terminal.
  • Step 402 The terminal determines the mapping number of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port.
  • Step 403 The terminal determines a port mapping of the DMRS of the terminal according to the determined mapping number of the DMRS port of the terminal.
  • Step 404 The terminal receives the DMRS sent by the base station according to the port mapping of the DMRS.
  • step 402-step 403 For the specific implementation process of step 402-step 403, refer to step 302-step 303. For brevity, details are not described herein again.
  • the present application provides a base station 500.
  • the base station 500 includes a processing unit 501 and a sending unit 502:
  • the processing unit 501 is configured to determine an index of a beam corresponding to the terminal, and determine a mapping number of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port. And determining, according to the determined mapping number of the DMRS port of the terminal, a port mapping of the DMRS of the terminal.
  • the sending unit 502 is configured to send a DMRS to the terminal according to the port mapping of the DMRS.
  • mapping number of the DMRS port of the terminal determined by the processing unit 501 meets the following formula requirements:
  • the RNTI is an RNTI of the terminal; The number of ECCEs used for EPDCCH transmission of the terminal; The number of ECCEs included for each PRB; C is a positive integer.
  • the processing unit 501 is configured to determine, according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port, the mapping number of the DMRS port of the terminal, specifically: The index of the beam corresponding to the terminal, the total number of candidate beams of the terminal, and the mapping number of the DMRS port of the terminal.
  • mapping number of the DMRS port of the terminal determined by the processing unit 501 meets the following formula requirements:
  • n ' is the terminal DMRS port number mapping; n BI index a beam corresponding to the terminal, n BI ⁇ 0; candidate total number of beams N BI to the terminal, N BI ⁇ n BI; n ECCE,low is the lowest ECCE number corresponding to the EPDCCH transmission of the terminal; n RNTI is the RNTI of the terminal; The number of ECCEs used for EPDCCH transmission of the terminal; The number of ECCEs included for each PRB.
  • the division of the unit in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • the functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the hardware of the entity corresponding to the processing unit 501 may be a processor, such as the processor 601 of FIG. 6, and the hardware of the entity corresponding to the sending unit 502 may be a transmitter.
  • the present application further provides a base station 600.
  • the base station 600 includes a processor 601 and a transmitter 602, for example, the processor 601 and the transmitter.
  • the 602 are connected to each other through a bus 603.
  • the processor 601 is configured to determine an index of a beam corresponding to the terminal, and determine a mapping number of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port; And determining, according to the determined mapping number of the DMRS port of the terminal, a port mapping of the DMRS of the terminal.
  • the transmitter 602 is configured to send a DMRS to the terminal according to the port mapping of the DMRS.
  • the processor 601 may be a general-purpose processor, including a central processing unit (English: central processing unit, CPU for short), a network processor (English: network processor, abbreviated as: NP), and the like; English: figital signal processor (referred to as: DSP), application-specific integrated circuit (English: application-specific integrated circuit, referred to as: ASIC), field-programmable gate array (English: field-programmable gate array, Abbreviation: FPGA) or other programmable logic devices.
  • a central processing unit English: central processing unit, CPU for short
  • a network processor English: network processor, abbreviated as: NP
  • figital signal processor referred to as: DSP
  • application-specific integrated circuit English: application-specific integrated circuit, referred to as: ASIC
  • field-programmable gate array International Field-programmable gate array, Abbreviation: FPGA
  • the base station 600 may further include: a memory for storing a program.
  • the program can include program code, the program code including computer operating instructions.
  • the memory may include random access memory (English: random access memory, RAM for short), and may also include non-volatile memory (English: non-volatile memory), such as at least one disk storage.
  • the processor 601 executes program code stored in the memory to implement the above functions.
  • the present application provides a terminal 700.
  • the terminal 700 includes a processing unit 701 and a receiving unit 702:
  • the processing unit 701 is configured to determine an index of a beam corresponding to the terminal, and determine a mapping of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port. No.
  • the port mapping of the DMRS of the terminal is determined according to the determined mapping number of the DMRS port of the terminal.
  • the receiving unit 702 is configured to receive, according to the port mapping of the DMRS, a DMRS sent by the base station.
  • mapping number of the DMRS port of the terminal determined by the processing unit 701 meets the following formula requirements:
  • the processing unit 701 is specifically configured to: when determining a mapping number of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port.
  • mapping number of the DMRS port of the terminal determined by the processing unit 701 meets the following formula requirements:
  • n ' is the terminal DMRS port number mapping; n BI index a beam corresponding to the terminal, n BI ⁇ 0; candidate total number of beams N BI to the terminal, N BI ⁇ n BI; n ECCE,low is the lowest ECCE number corresponding to the EPDCCH transmission of the terminal; n RNTI is the RNTI of the terminal; The number of ECCEs used for EPDCCH transmission of the terminal; The number of ECCEs included for each PRB.
  • the division of the unit in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • the functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the hardware of the entity corresponding to the processing unit 701 may be a processor, such as the processor 801 of FIG. 8, and the hardware of the entity corresponding to the receiving unit 702 may be a transmitter.
  • the hardware of the entity corresponding to the receiving unit 702 may be a transmitter.
  • the present application further provides a terminal 800.
  • the terminal 800 includes a processor 801 and a receiver 802, for example, the processor 801 and the receiver.
  • the 802s are connected to each other through a bus 803.
  • the processor 801 is configured to determine an index of a beam corresponding to the terminal, and determine a mapping of the DMRS port of the terminal according to the correspondence between the index of the beam corresponding to the terminal and the mapping number of the DMRS port. No.
  • the port mapping of the DMRS of the terminal is determined according to the determined mapping number of the DMRS port of the terminal.
  • the receiver 802 is configured to receive, according to the port mapping of the DMRS, a DMRS sent by a base station.
  • the processor 801 can be a general purpose processor, including a central processing unit, a network processor, etc.; can also be a digital signal processor, an application specific integrated circuit), a field programmable gate array, or other programmable logic device.
  • the terminal 800 may further include: a memory for storing a program.
  • the program can include program code, the program code including computer operating instructions.
  • the memory may include random access memory and may also include non-volatile memory, such as at least one disk storage.
  • the processor 801 executes program code stored in the memory to implement the above functions.
  • the DMRS port mapping is performed according to the beam information corresponding to the terminal, so that the possibility that the terminals corresponding to different beams are mapped to different DMDRS ports is improved, and the enhanced type is also improved.
  • the success rate of the control channel for multi-user transmission 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 invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media 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 include instructions.
  • the instruction means implements the functions specified in a block or blocks of a flow or a flow and/or a 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.

Abstract

一种确定DMRS的端口映射的方法、基站和终端，基站侧的方法为：基站确定终端对应的波束的索引；所述基站根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；所述基站根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；所述基站根据所述DMRS的端口映射向所述终端发送DMRS。上述方法通过建立波束信息与DMRS的端口映射之间的关联关系，使得对应不同波束的两个终端有很大的可能性被映射到不同的DMRS端口。

Description

一种确定DMRS的端口映射的方法、基站和终端
本申请要求在2016年04月08日提交中国专利局、申请号为201610216574.1、申请名称为“一种确定DMRS的端口映射的方法、基站和终端”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
本发明涉及通信技术领域，尤其涉及一种确定解调参考信号(英文：Demodulation Reference Signal，简称：DMRS)的端口映射的方法、基站和终端。
背景技术
基站可以对增强型控制信道进行波束赋形，以提高增强型控制信道传输的覆盖和性能。波束赋形技术能够在某个特定角度增强信号，在另一个特定角度减弱信号，从而能够同时在发送端和接收端实现空间的选择性。
增强型控制信道的传输可以基于多个模拟波束进行，其中，每个模拟波束对应了增强型控制信道的一个虚拟小区，每个虚拟小区对应了一个空间波束。不同的模拟波束对应了不同的虚拟小区，即，不同的模拟波束对应了不同的空间波束，因此使用了不同模拟波束的终端配对时，波束区分度更高，配对终端之间的干扰更小。
例如，图1中，模拟波束1下的增强控制信道的传输基于模拟波束1对应的空间波束，模拟波束2下的增强型控制信道的传输基于模拟波束2对应的空间波束。每个模拟波束下还可以有不同的粒度更细的细波束，图1中，终端1和终端2使用了模拟波束1下的不同细波束，终端3使用了模拟波束2下的细波束。因为终端1和终端2使用的细波束的方向相近，在进行增强型控制信道的多终端传输时容易造成干扰，因此由终端1和终端2组成的终端配对，要差于终端1和终端3组成的终端配对。
组成终端配对的两个终端需要被映射到不同的DMRS端口。集中式传输模式下，增强型控制信道对应的DMRS的端口映射方法可表示如下：
Figure PCTCN2017079127-appb-000001
其中，n'表示终端的DMRS端口的映射编号，nECCE,low为终端的增强物理下行控制信道(英文：Enhanced-Physical Downlink Control Channel，简称：EPDCCH)传输对应的最低增强控制信道单元(英文：Enhanced Control Channel Element，简称：ECCE)编号，nRNTI为终端的无线网络临时标识符(英文：Radio Network Temporary Identity，简称：RNTI)，
Figure PCTCN2017079127-appb-000002
为用于终端的EPDCCH传输的ECCE个数(即聚合级别)，
Figure PCTCN2017079127-appb-000003
为每个物理资源块(英文：Physical Resource Block，简称：PRB)包含的ECCE个数。
按照上述DMRS的端口映射方法，对应了不同模拟波束的两个终端很可能被映射到相同的DMRS端口。
发明内容
本申请提供一种确定DMRS的端口映射的方法、基站和终端，通过建立波束信息与DMRS的端口映射之间的关联关系，使得对应不同波束的两个终端有很大的可能性被映射到不同的DMRS端口。
本申请第一方面，提供了一种确定DMRS的端口映射的方法，包括：
基站确定终端对应的波束的索引；
所述基站根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；
所述基站根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
所述基站根据所述DMRS的端口映射向所述终端发送DMRS。
本申请第二方面，提供了一种确定DMRS的端口映射的方法，包括：
终端确定所述终端对应的波束的索引；
所述终端根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；
所述终端根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
所述终端根据所述DMRS的端口映射接收基站发送的DMRS。
本申请第三方面，提供了一种基站，所述基站具有实现上述方法的功能。所述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模块或单元。
一种可能的实现方式中，所述基站包括处理单元和发送单元；
所述处理单元，用于确定终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
所述发送单元，用于根据所述DMRS的端口映射向所述终端发送DMRS。
另一种可能的实现方式中，所述基站包括处理器和发送器，所述发送器和所述处理器之间通过总线系统相互连接；
所述处理器，用于确定终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
所述发送器，用于根据所述DMRS的端口映射向所述终端发送DMRS。
本申请第四方面，提供了一种终端，所述终端具有实现上述方法的功能。所述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模块或单元。
一种可能的实现方式中，所述终端包括处理单元和接收单元；
所述处理单元，用于确定所述终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
所述接收单元，用于根据所述DMRS的端口映射接收基站发送的DMRS。
另一种可能的实现方式中，所述终端包括处理器和接收器，所述接收器和所述处理器之间通过总线系统相互连接；
所述处理器，用于确定所述终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
所述接收器，用于根据所述DMRS的端口映射接收基站发送的DMRS。
基于第一方面，第二方面，第三方面或第四方面的任一方面：
在一个可能的设计中，所述终端的DMRS端口的映射编号满足下述公式要求：
Figure PCTCN2017079127-appb-000004
或
Figure PCTCN2017079127-appb-000005
其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；nECCE,low为所述终端的EPDCCH传输对应的最低ECCE编号；nRNTI为所述终端的RNTI；
Figure PCTCN2017079127-appb-000006
为用于所述终端的EPDCCH传输的ECCE个数；
Figure PCTCN2017079127-appb-000007
为每个PRB包含的ECCE个数；C为正整数。
在一个可能的设计中，所述基站根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号，包括：
所述基站根据所述终端对应的波束的索引、所述终端的候选波束总数目，确定所述终端的DMRS端口的映射编号。
在一个可能的设计中，所述终端的DMRS端口的映射编号满足下述公式要求：
Figure PCTCN2017079127-appb-000008
或
Figure PCTCN2017079127-appb-000009
其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；NBI为所述终端的候选波束总数目，NBI≥nBI；nECCE,low为所述终端的EPDCCH传输对应的最低ECCE编号；nRNTI为所述终端的RNTI；
Figure PCTCN2017079127-appb-000010
为用于所述终端的EPDCCH传输的ECCE个数；
Figure PCTCN2017079127-appb-000011
为每个PRB包含的ECCE个数。
利用本申请提供的方案，结合终端对应的波束信息进行DMRS的端口映射，从而提高对应了不同波束的终端被映射到不同的DMDRS端口的可能性，也提高增强型控制信道进行多用户传输的成功率。
附图说明
图1为现有技术下应用了波束赋形的增强控制信道的传输示意图；
图2为本申请提供的一种确定DMRS的端口映射的方法应用的系统示意图；
图3为本申请提供的一种基站确定DMRS的端口映射的流程图；
图4为本申请提供的一种终端确定DMRS的端口映射的流程图；
图5为本申请提供的一种基站的结构示意图；
图6为本申请提供的一种终端的结构示意图；
图7为本申请提供的另一种基站的结构示意图；
图8为本申请提供的另一种终端的结构示意图。
具体实施方式
以下，对本申请中的部分用语进行解释说明。
“终端配对”，指的是基站在相同的时频资源上同时发送两个终端的数据，从而多个单天线终端可以组成终端组在同一时频资源块中与多天线基站形成虚拟的多输入多输出系统(英文：Multiple-Input Multiple-Output，简称：MIMO)信道。
“模拟波束”，指的是根据移相器在R(R>＝1)个天线阵子上作用复值加权系数形成的波束。
终端的候选波束总数目，指的是终端的所有候选波束的总数。可选地，一个小区内的所有终端的候选波束总数目是相同的，以图1为例，图中的每个宽波束对应了一个候选波束，而图中的候选波束总数目为2.一般终端的候选波束总数目的下限为1。
组成终端配对的两个终端如果对应了不同的波束，则所述两个终端需要被映射到不同的DMRS端口，例如，图1中的终端1和终端3若组成终端配对，终端1的DMRS的端口映射如果为DMRS端口7，终端3的DMRS的端口映射需为不同于DMRS端口7的其它DMRS端口，如DMRS端口8。但从公式(1)可以看出，当前的DMRS的端口映射方法只跟终端的最低ECCE编号，终端的RNTI，终端的聚合级别等参数有关，与终端对应的波束信息无关。因此按照当前的DMRS的端口映射方法，要使对应了不同波束的终端被映射到不同的DMRS端口是带有随机性的，对应了不同波束的两个终端很可能被映射到相同的DMRS端口。
为此，本申请提出了一种确定DMRS的端口映射的方法、基站和终端，结合终端对应的波束信息进行DMRS的端口映射，从而提高对应了不同波束的终端被映射到不同的DMDRS端口的可能性，也提高增强型控制信道进行多用户传输的成功率。
下面结合说明书附图和各实施例对本发明技术方案进行说明。
本申请提供的确定DMRS的端口映射的方法，可应用于图2所示的无线通信系统中，包括基站201和终端202。所述无线通信系统可以但不限于是宽带码分多址接入(英文：Wide-band Code Division Multiple Access，简称：WCDMA)系统、长期演进系统后续演进(Long Term Evolution，LTE)系统、长期演进系统后续演进高级系统(Long Term Evolution-Advanced，LTE-A)、第五代蜂窝通信(The 5rd Generation Cellular Communication Standard，5G)等。
基站201，可以是宏基站(英文：Macro eNodeB，简称：Macro eNB)、小基站(英文：Small eNB)、微基站(英文：Micro eNB)、微微基站(英文：Pico eNB)、毫微微基站(英文：Femto eNB)等，本申请对基站的实现形式并不作限制。本申请中，基站201用于根据终端对应的波束信息，确定出终端202的DMRS的端口映射，并根据所述DMRS的端 口映射向终端202发送DMRS。
终端202，也可称之为用户设备(英文：User Equipment，简称：UE)，终端202可以是移动电话、笔记本、平板电脑或者车载移动装置等。本申请中，终端202用于根据终端202对应的波束信息，确定出终端202的DMRS的端口映射，并根据所述DMRS的端口映射接收基站201发送的DMRS。
本发明技术方案不限制EPDCCH的传输模式，如可以是集中式传输模式，也可以是离散式传输模式。下文主要以集中式传输模式为例进行说明。
此外，本发明技术方案也不限制波束的形式，如可以是模拟波束、数字波束、混合波束等。
需要说明的是，本发明技术方案提及的公式主要基于集中式传输模式的场景推导得到，若要将本发明技术方案应用于离散式传输模式的场景，需要对本发明技术方案中的公式进行相关变型。并且，本发明技术方案提及的所有公式可以有更多符合逻辑的变型。
如图3所示，基站确定DMRS的端口映射的流程如下：
步骤301：基站确定终端对应的波束的索引。
其中，不同的波束对应了不同的索引。
步骤302：所述基站根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号。
可选的，步骤302中，基站可以通过存储有所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系的映射表来实现，也可以通过指示了所述终端对应的波束的索引与DMRS端口的映射编号之间的关联关系的映射公式来实现。
下面介绍如何通过映射公式确定终端的DMRS端口的映射编号。可选的，可以有以下三种方式：
方式一：根据所述终端对应的波束的索引、所述终端的EPDCCH传输对应的最低ECCE编号、所述终端的EPDCCH传输的ECCE个数和每个PRB包含的ECCE个数，确定终端的DMRS端口的映射编号。
一种可能的映射公式如公式(2)所示：
Figure PCTCN2017079127-appb-000012
其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；nECCE,low为所述终端的EPDCCH传输对应的最低ECCE编号；
Figure PCTCN2017079127-appb-000013
为用于所述终端的EPDCCH传输的ECCE个数；
Figure PCTCN2017079127-appb-000014
为每个PRB包含的ECCE个数。
公式(2)建立了终端的波束索引与该终端的DMRS端口的映射编号之间的关联关系，通过这种关联关系，可以提高对应不同波束的终端的EPDCCH被映射到不同的DMRS端口的概率。
方式二：根据所述终端对应的波束的索引、所述终端的RNTI、所述终端的EPDCCH传输对应的最低ECCE编号、所述终端的EPDCCH传输的ECCE个数和每个PRB包含的ECCE个数，确定终端的DMRS端口的映射编号。
一种可能的映射公式如公式(3)所示：
Figure PCTCN2017079127-appb-000015
其中，nRNTI为所述终端的RNTI，C为正整数，其余参数的含义可参见公式(2)。
公式(3)中“C”的引入是为了保证公式(3)中的(nBI+C)不为0，在其它可能的示例中，也可以将公式(3)中的(nBI+C)中的“+C”替换为其它对nBI作运算后结果非0的运算方式，如对nBI求平方值等。
公式(3)建立了终端的RNTI和波束索引与该终端的DMRS端口的映射编号之间的关联关系，通过这种关联关系，在终端对应的波束索引相同的情况下还可以根据终端的RNTI进行DMRS端口的进一步映射，相比公式(2)更加提高了对应不同波束的终端的EPDCCH被映射到不同的DMRS端口的概率。
方式三：根据所述终端对应的波束的索引、所述终端的候选波束总数目，所述终端的RNTI、所述终端的EPDCCH传输对应的最低ECCE编号、所述终端的EPDCCH传输的ECCE个数和每个PRB包含的ECCE个数，确定终端的DMRS端口的映射编号。
一种可能的映射公式如公式(4)所示：
Figure PCTCN2017079127-appb-000016
其中，NBI为所述终端的候选波束总数目，其余参数的含义可参见公式(2)和公式(3)。
根据公式(4)，当终端对应的波束索引nBI大于或者等于nRNTImod NBI时，DMRS端口的映射编号根据nBI进行区分。而当nBI小于nRNTImod NBI时，DMRS端口的映射编号根据nRNTImod NBI进行区分。从而可实现，当nBI较大时，以较大的概率根据nBI进行DMRS端口的映射。
另一种可能的映射公式如公式(5)所示：
Figure PCTCN2017079127-appb-000017
其中，NBI为所述终端的候选波束总数目，其余参数的含义可参见公式(2)和公式(3)。
根据公式(5)，当终端对应的波束索引nBI小于等于nRNTImod NBI时，DMRS端口的映射编号根据nBI进行区分。而当nBI大于nRNTImod NBI时，DMRS端口的映射编号根据nRNTImod NBI进行区分。从而可实现，当nBI较小时，以较大的概率根据nBI进行DMRS端口的映射。
在另一种可能的示例中，也可以使用波束的扰码来代替波束的索引。
步骤303：所述基站根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射。
其中，可以预先存储DMRS端口的映射编号与DMRS的端口映射的对应关系，如下表1所示。
表1
Figure PCTCN2017079127-appb-000018
步骤304：所述基站根据所述DMRS的端口映射向所述终端发送DMRS。
相对应的，终端侧也需要确定对应的DMRS的端口映射，并根据确定出的DMRS的端口映射接收基站发送的DMRS。
如图4所示，终端确定DMRS的端口映射的流程如下：
步骤401：终端确定所述终端对应的波束的索引。
步骤402：所述终端根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号。
步骤403：所述终端根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射。
步骤404：所述终端根据所述DMRS的端口映射接收基站发送的DMRS。
其中，步骤402-步骤403的具体实现过程可以参考步骤302-步骤303，为了简便，此处不再赘述。
基于本申请上述提供的确定DMRS的端口映射的方法，本申请提供一种基站500，如图5所示，所述基站500包括处理单元501和发送单元502：
所述处理单元501，用于确定终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射。
所述发送单元502，用于根据所述DMRS的端口映射向所述终端发送DMRS。
可选的，所述处理单元501确定的所述终端的DMRS端口的映射编号满足下述公式要求：
Figure PCTCN2017079127-appb-000019
或
Figure PCTCN2017079127-appb-000020
其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引， nBI≥0；nECCE,low为所述终端的EPDCCH传输对应的最低ECCE编号；nRNTI为所述终端的RNTI；
Figure PCTCN2017079127-appb-000021
为用于所述终端的EPDCCH传输的ECCE个数；
Figure PCTCN2017079127-appb-000022
为每个PRB包含的ECCE个数；C为正整数。
可选的，所述处理单元501在根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号时，具体用于：根据所述终端对应的波束的索引、所述终端的候选波束总数目，确定所述终端的DMRS端口的映射编号。
可选的，所述处理单元501确定的所述终端的DMRS端口的映射编号满足下述公式要求：
Figure PCTCN2017079127-appb-000023
或
Figure PCTCN2017079127-appb-000024
其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；NBI为所述终端的候选波束总数目，NBI≥nBI；nECCE,low为所述终端的EPDCCH传输对应的最低ECCE编号；nRNTI为所述终端的RNTI；
Figure PCTCN2017079127-appb-000025
为用于所述终端的EPDCCH传输的ECCE个数；
Figure PCTCN2017079127-appb-000026
为每个PRB包含的ECCE个数。
本实施例中未尽之细节可参考上述图2所示方法中对基站的描述，在此不再赘述。
需要说明的是，本发明实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。在本申请的实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
其中，集成的单元采用硬件的形式实现时，所述处理单元501对应的实体的硬件可以为处理器，例如图6的处理器601，所述发送单元502对应的实体的硬件可以是发送器，例如图6的发送器602。
基于上述提供的确定DMRS的端口映射的方法，本申请还提供一种基站600，如图6所示，基站600包括处理器601和发送器602，例如，所述处理器601和所述发送器602通过总线603相互连接。
所述处理器601，用于确定终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射。
所述发送器602，用于根据所述DMRS的端口映射向所述终端发送DMRS。
所述处理器601可以是通用处理器，包括中央处理器(英文：central processing unit，简称：CPU)、网络处理器(英文：network processor，简称：NP)等；还可以是数字信号处理器(英文：figital signal processor，简称：DSP)、专用集成电路(英文：application-specific integrated circuit，简称：ASIC)、现场可编程门阵列(英文：field－programmable gate array， 简称：FPGA)或者其他可编程逻辑器件等。
所述处理器601为CPU时，所述基站600还可以包括：存储器，用于存储程序。具体地，程序可以包括程序代码，所述程序代码包括计算机操作指令。存储器可能包含随机存取存储器(英文：random access memory，简称：RAM)，也可能还包括非易失性存储器(英文：non-volatile memory)，例如至少一个磁盘存储器。所述处理器601执行所述存储器中存储的程序代码，实现上述功能。
基于本申请上述提供的确定DMRS的端口映射的方法，本申请提供一种终端700，如图7所示，所述终端700包括处理单元701和接收单元702：
所述处理单元701，用于确定所述终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射。
所述接收单元702，用于根据所述DMRS的端口映射接收基站发送的DMRS。
可选的，所述处理单元701确定的所述终端的DMRS端口的映射编号满足下述公式要求：
Figure PCTCN2017079127-appb-000027
或
Figure PCTCN2017079127-appb-000028
其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；nECCE,low为所述终端的增强物理下行控制信道EPDCCH传输对应的最低增强控制信道单元ECCE编号；nRNTI为所述终端的无线网络临时标识符RNTI；
Figure PCTCN2017079127-appb-000029
为用于所述终端的EPDCCH传输的ECCE个数；
Figure PCTCN2017079127-appb-000030
为每个物理资源块PRB包含的ECCE个数；C为正整数。
可选的，所述处理单元701在根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号时，具体用于：
根据所述终端对应的波束的索引、所述终端的候选波束总数目，确定所述终端的DMRS端口的映射编号。
可选的，所述处理单元701确定的所述终端的DMRS端口的映射编号满足下述公式要求：
Figure PCTCN2017079127-appb-000031
或
Figure PCTCN2017079127-appb-000032
其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；NBI为所述终端的候选波束总数目，NBI≥nBI；nECCE,low为所述终端的EPDCCH传输对应的最低ECCE编号；nRNTI为所述终端的RNTI；
Figure PCTCN2017079127-appb-000033
为用于所述终端的 EPDCCH传输的ECCE个数；
Figure PCTCN2017079127-appb-000034
为每个PRB包含的ECCE个数。
需要说明的是，本发明实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。在本申请的实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
其中，集成的单元采用硬件的形式实现时，所述处理单元701对应的实体的硬件可以为处理器，例如图8的处理器801，所述接收单元702对应的实体的硬件可以是发送器，例如图8的接收器802。
基于上述提供的确定DMRS的端口映射的方法，本申请还提供一种终端800，如图8所示，终端800包括处理器801和接收器802，例如，所述处理器801和所述接收器802通过总线803相互连接。
所述处理器801，用于确定所述终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射。
所述接收器802，用于根据所述DMRS的端口映射接收基站发送的DMRS。
所述处理器801可以是通用处理器，包括中央处理器、网络处理器等；还可以是数字信号处理器、专用集成电路)、现场可编程门阵列或者其他可编程逻辑器件等。
所述处理器801为CPU时，所述终端800还可以包括：存储器，用于存储程序。具体地，程序可以包括程序代码，所述程序代码包括计算机操作指令。存储器可能包含随机存取存储器，也可能还包括非易失性存储器，例如至少一个磁盘存储器。所述处理器801执行所述存储器中存储的程序代码，实现上述功能。
综上所述，利用本发明实施例提供的技术方案，根据终端对应的波束信息进行DMRS的端口映射，从而提高对应了不同波束的终端被映射到不同的DMDRS端口的可能性，也提高增强型控制信道进行多用户传输的成功率。
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，本发明可采用完全硬件实施例、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，本发明可采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质(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，使得根据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。

Claims (18)

  1. 一种确定解调参考信号DMRS的端口映射的方法，其特征在于，包括：
    基站确定终端对应的波束的索引；
    所述基站根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；
    所述基站根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
    所述基站根据所述DMRS的端口映射向所述终端发送DMRS。
  2. 如权利要求1所述的方法，其特征在于，所述终端的DMRS端口的映射编号满足下述公式要求：
    Figure PCTCN2017079127-appb-100001
    或
    Figure PCTCN2017079127-appb-100002
    其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；nECCE,low为所述终端的增强物理下行控制信道EPDCCH传输对应的最低增强控制信道单元ECCE编号；nRNTI为所述终端的无线网络临时标识符RNTI；
    Figure PCTCN2017079127-appb-100003
    为用于所述终端的EPDCCH传输的ECCE个数；
    Figure PCTCN2017079127-appb-100004
    为每个物理资源块PRB包含的ECCE个数；C为正整数。
  3. 如权利要求1所述的方法，其特征在于，所述基站根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号，包括：
    所述基站根据所述终端对应的波束的索引、所述终端的候选波束总数目，确定所述终端的DMRS端口的映射编号。
  4. 如权利要求3所述的方法，其特征在于，所述终端的DMRS端口的映射编号满足下述公式要求：
    Figure PCTCN2017079127-appb-100005
    或
    Figure PCTCN2017079127-appb-100006
    其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；NBI为所述终端的候选波束总数目，NBI≥nBI；nECCE,low为所述终端的EPDCCH传输对应的最低ECCE编号；nRNTI为所述终端的RNTI；
    Figure PCTCN2017079127-appb-100007
    为用于所述终端的EPDCCH传输的ECCE个数；
    Figure PCTCN2017079127-appb-100008
    为每个PRB包含的ECCE个数。
  5. 一种确定解调参考信号DMRS的端口映射的方法，其特征在于，包括：
    终端确定所述终端对应的波束的索引；
    所述终端根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；
    所述终端根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
    所述终端根据所述DMRS的端口映射接收基站发送的DMRS。
  6. 如权利要求5所述的方法，其特征在于，所述终端的DMRS端口的映射编号满足下述公式要求：
    Figure PCTCN2017079127-appb-100009
    或
    Figure PCTCN2017079127-appb-100010
    其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；nECCE,low为所述终端的增强物理下行控制信道EPDCCH传输对应的最低增强控制信道单元ECCE编号；nRNTI为所述终端的无线网络临时标识符RNTI；
    Figure PCTCN2017079127-appb-100011
    为用于所述终端的EPDCCH传输的ECCE个数；
    Figure PCTCN2017079127-appb-100012
    为每个物理资源块PRB包含的ECCE个数；C为正整数。
  7. 如权利要求5所述的方法，其特征在于，所述终端根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号，包括：
    所述终端根据所述终端对应的波束的索引、所述终端的候选波束总数目，确定所述终端的DMRS端口的映射编号。
  8. 如权利要求7所述的方法，其特征在于，所述终端的DMRS端口的映射编号满足下述公式要求：
    Figure PCTCN2017079127-appb-100013
    或
    Figure PCTCN2017079127-appb-100014
    其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；NBI为所述终端的候选波束总数目，NBI≥nBI；nECCE,low为所述终端的EPDCCH传输对应的最低ECCE编号；nRNTI为所述终端的RNTI；
    Figure PCTCN2017079127-appb-100015
    为用于所述终端的 EPDCCH传输的ECCE个数；
    Figure PCTCN2017079127-appb-100016
    为每个PRB包含的ECCE个数。
  9. 一种基站，其特征在于，包括：
    处理单元，用于确定终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
    发送单元，用于根据所述DMRS的端口映射向所述终端发送DMRS。
  10. 如权利要求9所述的基站，其特征在于，所述处理单元确定的所述终端的DMRS端口的映射编号满足下述公式要求：
    Figure PCTCN2017079127-appb-100017
    或
    Figure PCTCN2017079127-appb-100018
    其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；nECCE,low为所述终端的增强物理下行控制信道EPDCCH传输对应的最低增强控制信道单元ECCE编号；nRNTI为所述终端的无线网络临时标识符RNTI；
    Figure PCTCN2017079127-appb-100019
    为用于所述终端的EPDCCH传输的ECCE个数；
    Figure PCTCN2017079127-appb-100020
    为每个物理资源块PRB包含的ECCE个数；C为正整数。
  11. 如权利要求9所述的基站，其特征在于，所述处理单元在根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号时，具体用于：
    根据所述终端对应的波束的索引、所述终端的候选波束总数目，确定所述终端的DMRS端口的映射编号。
  12. 如权利要求11所述的基站，其特征在于，所述处理单元确定的所述终端的DMRS端口的映射编号满足下述公式要求：
    Figure PCTCN2017079127-appb-100021
    或
    Figure PCTCN2017079127-appb-100022
    其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；NBI为所述终端的候选波束总数目，NBI≥nBI；nECCE,low为所述终端的EPDCCH传输对应的最低ECCE编号；nRNTI为所述终端的RNTI；
    Figure PCTCN2017079127-appb-100023
    为用于所述终端的 EPDCCH传输的ECCE个数；
    Figure PCTCN2017079127-appb-100024
    为每个PRB包含的ECCE个数。
  13. 一种终端，其特征在于，包括：
    处理单元，用于确定所述终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
    接收单元，用于根据所述DMRS的端口映射接收基站发送的DMRS。
  14. 如权利要求13所述的终端，其特征在于，所述处理单元确定的所述终端的DMRS端口的映射编号满足下述公式要求：
    Figure PCTCN2017079127-appb-100025
    或
    Figure PCTCN2017079127-appb-100026
    其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；nECCE,low为所述终端的增强物理下行控制信道EPDCCH传输对应的最低增强控制信道单元ECCE编号；nRNTI为所述终端的无线网络临时标识符RNTI；
    Figure PCTCN2017079127-appb-100027
    为用于所述终端的EPDCCH传输的ECCE个数；
    Figure PCTCN2017079127-appb-100028
    为每个物理资源块PRB包含的ECCE个数；C为正整数。
  15. 如权利要求13所述的终端，其特征在于，所述处理单元在根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号时，具体用于：
    根据所述终端对应的波束的索引、所述终端的候选波束总数目，确定所述终端的DMRS端口的映射编号。
  16. 如权利要求15所述的终端，其特征在于，所述处理单元确定的所述终端的DMRS端口的映射编号满足下述公式要求：
    Figure PCTCN2017079127-appb-100029
    或
    Figure PCTCN2017079127-appb-100030
    其中，n'为所述终端的DMRS端口的映射编号；nBI为所述终端对应的波束的索引，nBI≥0；NBI为所述终端的候选波束总数目，NBI≥nBI；nECCE,low为所述终端的EPDCCH传输对应的最低ECCE编号；nRNTI为所述终端的RNTI；
    Figure PCTCN2017079127-appb-100031
    为用于所述终端的 EPDCCH传输的ECCE个数；
    Figure PCTCN2017079127-appb-100032
    为每个PRB包含的ECCE个数。
  17. 一种基站，其特征在于，包括：
    处理器，用于确定终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
    发送器，用于根据所述DMRS的端口映射向所述终端发送DMRS。
  18. 一种终端，其特征在于，包括：
    处理器，用于确定所述终端对应的波束的索引；根据设置的所述终端对应的波束的索引与DMRS端口的映射编号之间的对应关系，确定所述终端的DMRS端口的映射编号；根据确定的所述终端的DMRS端口的映射编号，确定所述终端的DMRS的端口映射；
    接收器，用于根据所述DMRS的端口映射接收基站发送的DMRS。
PCT/CN2017/079127 2016-04-08 2017-03-31 一种确定dmrs的端口映射的方法、基站和终端 WO2017173961A1 (zh)

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