WO2018058988A1 - 一种导频映射方法及装置 - Google Patents
一种导频映射方法及装置 Download PDFInfo
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- WO2018058988A1 WO2018058988A1 PCT/CN2017/086291 CN2017086291W WO2018058988A1 WO 2018058988 A1 WO2018058988 A1 WO 2018058988A1 CN 2017086291 W CN2017086291 W CN 2017086291W WO 2018058988 A1 WO2018058988 A1 WO 2018058988A1
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- 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
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- 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
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- the present invention relates to the field of communications technologies, and in particular, to a pilot mapping method and apparatus.
- TTI transmission time interval
- sTTI Short Transmission Time Interval
- each radio frame is composed of a subframe.
- each subframe has two slots.
- Each slot is composed of a fixed number of Orthogonal Frequency Division Multiplexing (OFDM) symbols.
- OFDM Orthogonal Frequency Division Multiplexing
- the length of the sTTI is 7 OFDM symbols, occupying one slot of the subframe.
- a control region and a data region exist in an sTTI having a length of 7 OFDM symbols.
- the resources of the control region are mainly used for transmitting a control channel, and the resources of the data region are mainly used for transmitting a data channel.
- the resources in the control area that are not used to transmit the control channel may be used to transmit a data channel.
- the control channel and data channel of the control region need to be demodulated based on Demodulation Reference Symbol (DMRS).
- DMRS Demodulation Reference Symbol
- the shortened physical downlink control channel (shortened PDCCH) carrying the downlink control information is demodulated based on the cell-specific reference signals (CRS).
- CRS cell-specific reference signals
- Embodiments of the present invention provide a pilot mapping method and apparatus for allocating independent DMRSs for control channels and data channels of a control region to implement DMRS-based demodulation of control region control channels and data channels.
- a pilot mapping method comprising:
- DMRS for data channel demodulation and DMRS for control channel demodulation are avoided.
- Resource conflicts which in turn enable independent demodulation of control region control channels and data channels based on DMRS.
- mapping the DMRS to the control channel and the first data channel in the control area respectively includes:
- the first DMRS and the second DMRS are respectively mapped in the resource units belonging to the control area.
- mapping the DMRS to the control channel and the first data channel in the control area respectively includes:
- mapping in the resource unit belonging to the control region, the first DMRS; and using the DMRS of the second data channel in the data region as the second DMRS.
- the resource unit of the first DMRS mapping is different from the resource unit of the second DMRS mapping.
- the first DMRS mapped resource unit and the second DMRS mapped resource unit are evenly distributed among all resource units in the short transmission time interval.
- the port number corresponding to the first DMRS is different from the port number of the second DMRS. Resource conflicts between the DMRS for data channel demodulation and the DMRS for control channel demodulation are avoided.
- a pilot mapping apparatus has a function of implementing the pilot mapping method involved above, and the function may be implemented by hardware or by executing corresponding software by hardware.
- the hardware or software includes one or more modules corresponding to the functions described above.
- the modules can be software and/or hardware.
- the apparatus comprises:
- a determining unit configured to determine a control channel to be demodulated and a first data channel, where the resource unit transmitting the control channel and the resource unit transmitting the first data channel are all control areas within a short transmission time interval ;
- a processing unit configured to determine, by the determining unit, the control channel and the first data channel to be demodulated in the control region, respectively mapping a demodulation reference signal DMRS, where the control channel is The DMRS is a first DMRS, the DMRS of the first data channel is a second DMRS, and the first DMRS and the second DMRS are independent of each other.
- the processing unit specifically maps the DMRS to the control channel and the first data channel in the control area by using:
- the first DMRS and the second DMRS are respectively mapped in the resource units belonging to the control area.
- the processing unit specifically maps the DMRS to the control channel and the first data channel in the control area by using:
- mapping is performed in the resource unit belonging to the control area a DMRS; and the DMRS of the second data channel in the data area is used as the second DMRS.
- the processing unit is different from the first DMRS mapped resource unit and the second DMRS mapped resource unit respectively mapped by the control channel and the first data channel.
- the processing unit is configured by the first DMRS mapped resource unit and the second DMRS mapped resource unit that are respectively mapped by the control channel and the first data channel, where Uniform distribution among all resource units in a short transmission time interval.
- the processing unit is different from the port number of the first DMRS and the second DMRS respectively mapped by the control channel and the first data channel. Resource conflicts between the DMRS for data channel demodulation and the DMRS for control channel demodulation are avoided.
- the pilot mapping apparatus may be implemented in a hardware form.
- the pilot mapping apparatus includes a processor and a memory, and the processor is configured to support the pilot mapping apparatus to perform the foregoing.
- the pilot mapping apparatus can also include a memory for coupling with a processor that holds the necessary program instructions and data.
- the control channel to be demodulated and the first data channel are determined, wherein the resource unit transmitting the control channel and the resource unit transmitting the first data channel are all controlled within a short transmission time interval.
- a demodulation reference signal DMRS is respectively mapped to the control channel and the first data channel in the control region, where a DMRS of the control channel is a first DMRS, and a DMRS of the first data channel It is a second DMRS, and the first DMRS and the second DMRS are independent of each other.
- independent DMRS is allocated for the control channel and the data channel of the control region, thereby implementing DMRS-based demodulation of the control region control channel and the data channel.
- FIG. 1 is a flowchart of a pilot mapping method according to an embodiment of the present invention
- FIG. 2 is a flowchart of an implementation process for mapping a DMRS to the control channel and the first data channel in the control area according to an embodiment of the present disclosure
- FIG. 4 is a flowchart of another implementation process for mapping a DMRS to the control channel and the first data channel in the control area according to an embodiment of the present disclosure
- FIG. 7 is a schematic structural diagram of a pilot mapping apparatus according to an embodiment of the present disclosure.
- FIG. 8 is a schematic structural diagram of still another pilot mapping apparatus according to an embodiment of the present invention.
- An embodiment of the present invention provides a pilot mapping method, which allocates independent DMRSs for control channels and data channels of a control region to implement DMRS-based demodulation of control region control channels and data channels.
- the pilot mapping method described in this embodiment of the present invention can be applied to an LTE system, or other wireless communication system adopting various radio access technologies, and can also be applied to a subsequent evolution system using an LTE system, such as a fifth generation 5G system. Wait.
- LTE system or other wireless communication system adopting various radio access technologies
- a subsequent evolution system using an LTE system such as a fifth generation 5G system. Wait.
- LTE system such as a fifth generation 5G system.
- Figure 1 is a flowchart of a pilot mapping method according to an embodiment of the present invention. As shown in Figure 1, the method includes:
- S101 Determine a control channel to be demodulated and a first data channel.
- the length of the short transmission time interval sTTI is 7 OFDM symbols in the LTE system, and the control region and the data region exist in an sTTI having a length of 7 OFDM symbols, and the resources of the control region are mainly used for transmission control.
- Channels, resources of the data area are mainly used to transmit data channels. Resources that are not used to transmit control channels in the control region can be used to transport data channels.
- the control channel and the data channel of the control region need to be demodulated based on the demodulation reference signal DMRS.
- a network device eg, a base station
- a control channel to be demodulated and a first data channel
- a resource unit transmitting the control channel and a resource unit transmitting the first data channel are each a short transmission time interval
- the control region within the sTTI, in the LTE system, the resource unit may be an OFDM symbol.
- the network device after determining that the control channel and the first data channel need to be demodulated, the network device (for example, the base station) separately maps the control channel and the first data channel in the control region. Adjust the reference signal DMRS.
- the DMRS of the control channel is recorded as a first DMRS
- the DMRS of the first data channel is recorded as a second DMRS
- the first DMRS and the first The two DMRSs are independent of each other.
- the mapping of the content of the control channel sPDCCH in the control region may be continuously distributed in the control region, or may be discontinuously distributed in the control region.
- the resources of the remaining unmapped control channels in the control region are available for mapping of data channels.
- Embodiments of the present invention will be described in detail below with respect to the implementation process of separately mapping DMRSs for the control channel and the first data channel in the control area according to the foregoing embodiments.
- FIG. 2 is a flowchart of an implementation process for mapping a DMRS to the control channel and the first data channel in the control area according to an embodiment of the present invention. As shown in FIG. 2, the method includes:
- the short transmission time interval sTTI includes 7 OFDM symbols, and the 7 OFDM symbols may be partially allocated to the control region, or may be partially allocated to the control region.
- all resource elements in the short transmission time interval sTTI belong to the control area.
- all 7 OFDM symbols are given to the control region, that is, 7 OFDM symbols in the sTTI belong to the control region at this time.
- S202 Map, in the resource unit belonging to the control area, the first DMRS and the second DMRS respectively.
- the network device after all the 7 OFDM symbols in the sTTI are given to the control region, the network device respectively maps the first DMRS and the second DMRS in the resource unit, thereby implementing the control region control channel and data.
- the channel is based on DMRS demodulation.
- mapping the DMRS for the control channel and the first data channel in the control area is described in detail in conjunction with the resource mapping diagram.
- the LTE system is taken as an example, the sTTI length is 7 OFDM symbols, and 12 subcarriers are used as a unit in the frequency domain.
- the legacy downlink control region occupies the first two resource units of the subframe, except for the resource elements occupied by the traditional downlink control region and the pilot, the first n resource units are used for transmitting the control channel, and the later resource units are used for data. Channel transmission.
- the second DMRS for data channel demodulation occupies the sixth and seventh OFDM symbols in the sTTI time domain, occupying the 2nd, 7th, and 12th subcarriers in the frequency domain.
- the first DMRS for control channel demodulation occupies the 3rd and 4th OFDM symbols in the sTTI time domain, occupying the 2nd, 7th, and 12th subcarriers in the frequency domain, and the first DMRS and the second DMRS use completely different DMRSs. Port number.
- FIG. 4 is a flowchart of an implementation process for mapping a DMRS to the control channel and the first data channel in the control area according to an embodiment of the present invention. As shown in FIG. 4, the method includes:
- a resource unit belonging to the data area and a resource unit belonging to the control area are stored in the short transmission time interval, and the DMRS of the second data channel is mapped in the data area.
- the LTE system is taken as an example.
- the short transmission time interval sTTI includes 7 OFDM symbols, and the 7 OFDM symbols may be partially allocated to the control region, or may be partially allocated to the control region.
- the resource unit belonging to the data area and the resource unit belonging to the control area exist in the short transmission time interval sTTI, and the data channel is recorded as the second data channel, and the second data channel is mapped in the data area.
- DMRS For the LTE system, the 7 OFDM symbol parts are allocated to the control area, and the second OFDM symbol is partially allocated to the second data area, that is, 7 OFDM symbols in the sTTI belong to the control area at this time, and a part belongs to the second data area.
- S402 Map the first DMRS in a resource unit belonging to the control area.
- the first DMRS is mapped in a resource unit OFDM symbol belonging to a control region in an sTTI.
- S403 Use the DMRS of the second data channel in the data area as the second DMRS.
- the embodiment of the present invention further provides an implementation process for mapping the DMRS to the control channel and the first data channel in the control area, and the resource mapping diagram is used for detailed description.
- the sTTI is 7 OFDM symbols in length, and 12 subcarriers are used as a unit in the frequency domain.
- the traditional downlink control region is assumed.
- PDCCH occupies the first two OFDM symbols of the subframe, assuming that the control region of the sTTI occupies the first four OFDM symbols, the data region occupies the next three OFDM symbols in the sTTI, and the DMRS for the demodulation of the data region occupies the sTTI time domain.
- the sixth and seventh OFDM symbols occupy the 2nd, 7th, and 12th subcarriers in the frequency domain.
- the first n resource elements of the control region are used to transmit a control channel, and there is no resource unit in the control region for transmitting a control channel for transmitting a data channel.
- the second DMRS for data channel demodulation occupies the sixth and seventh OFDM symbols in the sTTI time domain, occupying the 2nd, 7th, and 12th subcarriers in the frequency domain.
- the first DMRS for control channel demodulation occupies the 3rd and 4th OFDM symbols in the sTTI time domain, occupying the 2nd, 7th, and 12th subcarriers in the frequency domain, and the first DMRS and the second DMRS use completely different DMRSs. Port number.
- demodulating the DMRS in the second DMRS reuse data area of the data channel transmitted in the control region.
- the second DMRS for data channel demodulation occupies the 3rd and 4th OFDM symbols in the sTTI time domain, occupying the 2nd, 7th, and 12th subcarriers in the frequency domain.
- the first DMRS used for control channel demodulation occupies the 3rd and 4th OFDM symbols in the sTTI time domain, occupying the 2nd, 6th, and 12th subcarriers in the frequency domain.
- the first DMRS and the second DMRS are used The port number of the completely different DMRS.
- demodulating the DMRS in the second DMRS reuse data area of the data channel transmitted in the control region.
- the resource unit of the first DMRS mapping is different from the resource unit of the second DMRS mapping.
- the first DMRS mapped resource unit and the second DMRS mapped resource unit are evenly distributed among all resource units in the short transmission time interval.
- the embodiment of the present invention further provides a pilot mapping apparatus.
- the principle of solving the problem is similar to the function method performed by the network device in the pilot mapping method shown in FIG. 1 to FIG. Therefore, the implementation of the device can be referred to the implementation of the method, and the repeated description will not be repeated.
- a pilot mapping apparatus comprising: a determining unit 101 and a processing unit 102.
- a determining unit 101 configured to determine a control channel to be demodulated and a first data channel, where the resource unit transmitting the control channel and the resource unit transmitting the first data channel are all controlled within a short transmission time interval region.
- a processing unit 102 configured to determine, by the determining unit 101, the control channel and the first data channel to be demodulated in the control region, respectively, to demodulate a reference signal DMRS, where the control
- the DMRS of the channel is a first DMRS
- the DMRS of the first data channel is a second DMRS
- the first DMRS and the second DMRS are independent of each other.
- the processing unit 102 specifically maps the DMRS to the control channel and the first data channel in the control area in the following manner:
- the first DMRS and the second DMRS are respectively mapped in the resource units belonging to the control area.
- the processing unit 102 specifically maps the DMRS to the control channel and the first data channel in the control area in the following manner:
- mapping is performed in the resource unit belonging to the control area a DMRS; and the DMRS of the second data channel in the data area is used as the second DMRS.
- the processing unit 102 is different from the first DMRS mapped resource unit and the second DMRS mapped resource unit respectively mapped by the control channel and the first data channel.
- the processing unit 102 is configured by using the first DMRS mapped resource unit and the second DMRS mapped resource unit that are respectively mapped by the control channel and the first data channel. It is evenly distributed among all resource units in the short transmission time interval.
- the processing unit 102 separates the control channel and the first data channel respectively.
- the mapped first DMRS is different from the port number of the second DMRS.
- the pilot mapping device may be a network device
- the hardware structure and processing of the pilot mapping device provided by the embodiment of the present invention are taken as an example of the following by using the pilot mapping device as a network device. The way to explain.
- the pilot mapping apparatus includes a processor 1001 and a memory 1002.
- the memory 1002 is configured to store program code executed by the processor 1001.
- the processor 1001 is configured to read the program code stored in the memory 1002 and perform the following process:
- a DMRS of the control channel is a first DMRS
- a DMRS of the first data channel is a Two DMRSs
- the first DMRS and the second DMRS are independent of each other.
- the processor 1001 specifically maps the DMRS to the control channel and the first data channel in the control area in the following manner:
- the first DMRS and the second DMRS are respectively mapped in the resource units belonging to the control area.
- the processor 1001 specifically maps the DMRS to the control channel and the first data channel in the control area in the following manner:
- mapping is performed in the resource unit belonging to the control area a DMRS; and the DMRS of the second data channel in the data area is used as the second DMRS.
- the processor 1001 is different from the first DMRS mapped resource unit and the second DMRS mapped resource unit respectively mapped by the control channel and the first data channel.
- the processor 1001 is configured by using the first DMRS mapped resource unit and the second DMRS mapped resource unit that are respectively mapped by the control channel and the first data channel. It is evenly distributed among all resource units in the short transmission time interval.
- the processor 1001 is different from the port number of the first DMRS and the second DMRS respectively mapped by the control channel and the first data channel. Resource conflicts between the DMRS for data channel demodulation and the DMRS for control channel demodulation are avoided.
- the control channel to be demodulated and the first data channel are determined, wherein the resource unit transmitting the control channel and the resource unit transmitting the first data channel are all controlled within a short transmission time interval.
- a demodulation reference signal DMRS is respectively mapped to the control channel and the first data channel in the control region, where a DMRS of the control channel is a first DMRS, and a DMRS of the first data channel For the first Two DMRSs, and the first DMRS and the second DMRS are independent of each other.
- independent DMRS is allocated for the control channel and the data channel of the control region, thereby implementing DMRS-based demodulation of the control region control channel and the data channel.
- 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 produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Claims (13)
- 一种导频映射方法,其特征在于,包括:确定待进行解调的控制信道和第一数据信道,其中,传输所述控制信道的资源单元和传输所述第一数据信道的资源单元均属于短传输时间间隔内的控制区域;为所述控制区域内的所述控制信道和所述第一数据信道,分别映射解调参考信号DMRS;其中,所述控制信道的DMRS为第一DMRS,所述第一数据信道的DMRS为第二DMRS,且所述第一DMRS与所述第二DMRS彼此独立。
- 如权利要求1所述的方法,其特征在于,为所述控制区域内的所述控制信道和所述第一数据信道,分别映射DMRS,包括:若短传输时间间隔内的资源单元全部属于控制区域,则在属于控制区域的资源单元中,分别映射所述第一DMRS和所述第二DMRS。
- 如权利要求1所述的方法,其特征在于,为所述控制区域内的所述控制信道和所述第一数据信道,分别映射DMRS,包括:若短传输时间间隔内存在属于数据区域的资源单元和属于控制区域的资源单元,且所述数据区域内映射有第二数据信道的DMRS,则在属于控制区域的资源单元中,映射所述第一DMRS;并将所述数据区域内第二数据信道的DMRS,作为所述第二DMRS。
- 如权利要求1至3任一项所述的方法,其特征在于,所述第一DMRS映射的资源单元和所述第二DMRS映射的资源单元不同。
- 如权利要求4所述的方法,其特征在于,所述第一DMRS映射的资源单元和所述第二DMRS映射的资源单元,在所述短传输时间间隔内的全部资源单元中均匀分布。
- 如权利要求5所述的方法,其特征在于,所述第一DMRS对应的端口号,与所述第二DMRS的端口号不同。
- 一种导频映射装置,其特征在于,包括:确定单元,用于确定待进行解调的控制信道和第一数据信道,其中,传输所述控制信道的资源单元和传输所述第一数据信道的资源单元均属于短传输时间间隔内的控制区域;处理单元,用于为所述确定单元确定的,所述控制区域内待进行解调的所述控制信道和所述第一数据信道,分别映射解调参考信号DMRS,其中,所述控制信道的DMRS为第一DMRS,所述第一数据信道的DMRS为第二DMRS,且所述第一DMRS与所述第二DMRS彼此独立。
- 如权利要求7所述的装置,其特征在于,所述处理单元具体采用如下方式为所述 控制区域内的所述控制信道和所述第一数据信道,分别映射DMRS:若短传输时间间隔内的资源单元全部属于控制区域,则在属于控制区域的资源单元中,分别映射所述第一DMRS和所述第二DMRS。
- 如权利要求7所述的装置,其特征在于,所述处理单元具体采用如下方式为所述控制区域内的所述控制信道和所述第一数据信道,分别映射DMRS:若短传输时间间隔内存在属于数据区域的资源单元和属于控制区域的资源单元,且所述数据区域内映射有第二数据信道的DMRS,则在属于控制区域的资源单元中,映射所述第一DMRS;并将所述数据区域内第二数据信道的DMRS,作为所述第二DMRS。
- 如权利要求7至9任一项所述的装置,其特征在于,所述处理单元为所述控制信道和所述第一数据信道分别映射的所述第一DMRS映射的资源单元和所述第二DMRS映射的资源单元不同。
- 如权利要求10所述的装置,其特征在于,所述处理单元为所述控制信道和所述第一数据信道分别映射的所述第一DMRS映射的资源单元和所述第二DMRS映射的资源单元,在所述短传输时间间隔内的全部资源单元中均匀分布。
- 如权利要求11所述的装置,其特征在于,所述处理单元为所述控制信道和所述第一数据信道分别映射的所述第一DMRS与所述第二DMRS的端口号不同。
- 一种导频映射装置,其特征在于,所述导频映射装置包括:处理器和存储器;存储器,用于存储处理器执行的程序代码;处理器,用于确定待进行解调的控制信道和第一数据信道,其中,传输所述控制信道的资源单元和传输所述第一数据信道的资源单元均属于短传输时间间隔内的控制区域;为所述控制区域内的所述控制信道和所述第一数据信道,分别映射解调参考信号DMRS;其中,所述控制信道的DMRS为第一DMRS,所述第一数据信道的DMRS为第二DMRS,且所述第一DMRS与所述第二DMRS彼此独立。
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