WO2018024193A1 - 短tti中基于dmrs解调的控制信道资源配置的方法及装置 - Google Patents

短tti中基于dmrs解调的控制信道资源配置的方法及装置 Download PDF

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WO2018024193A1
WO2018024193A1 PCT/CN2017/095433 CN2017095433W WO2018024193A1 WO 2018024193 A1 WO2018024193 A1 WO 2018024193A1 CN 2017095433 W CN2017095433 W CN 2017095433W WO 2018024193 A1 WO2018024193 A1 WO 2018024193A1
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resource
short
resource element
short tti
time domain
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French (fr)
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王磊
高雪娟
潘学明
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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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
    • 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
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a method and apparatus for configuring a control channel resource based on a DMRS (Demodulation Reference Signal) demodulation in a short TTI (Transmission Time Interval).
  • DMRS Demodulation Reference Signal
  • the mobile Internet is subverting the traditional mobile communication business model, providing users with an unprecedented experience, which has a profound impact on all aspects of people's work and life.
  • the mobile Internet will promote the further upgrade of human social information interaction methods, providing users with a richer business experience such as augmented reality, virtual reality, ultra high definition (3D) video, mobile cloud and so on.
  • the further development of the mobile Internet will bring about a thousand times increase in mobile traffic in the future, and promote a new round of changes in mobile communication technologies and industries.
  • the Internet of Things has expanded the range of services for mobile communications, from human-to-human communication to the intelligent interconnection of people and things, things and things, making mobile communication technology penetrate into a wider range of industries and fields.
  • the PDCCH (physical downlink control channel) of the LTE system is used to carry scheduling information and other control information.
  • the transmission of one control channel occupies one CCE (control channel element) or multiple consecutive CCEs, each CCE is composed of 9 REGs (resource element group), and the REG included in the CCE of the PDCCH It is a REG that is not used to carry PCFICH and PHICH (Physical Hybrid Automatic Repeat Indicator Channel).
  • an EPDCCH Enhanced Physical Downlink Control Channel
  • the EPDCCH is transmitted in a data area in a subframe, and cannot occupy the transmission space of the PDCCH. Similar to the PDCCH, the concept of an EREG (enhanced resource element group) and an ECCE (enhanced control channel element) is introduced.
  • the TTI length is fixed to 1 ms, and the EREG and ECCE carrying the EPDCCH are defined in units of PRB pairs.
  • a PRB pair includes 12 subcarriers and 14 (normal CP) or 12 (extended CP) OFDM (Orthogonal Frequency Division Multiplexing) symbols.
  • the EREG removes the DMRS RE (resource element) from the PRB pair. Resource element) composition. The shorter the TTI length, the less RE resources are contained in the 12 subcarriers in the frequency domain of the TTI.
  • the embodiments of the present disclosure provide a method and apparatus for configuring a control channel resource based on DMRS demodulation in a short TTI, and implementing resources of a control channel based on DMRS demodulation in a control region, so that a short TTI can be used.
  • Downlink control channel based on DMRS demodulation Downlink control channel based on DMRS demodulation.
  • a DMRS demodulation based on a short TTI is provided. a method of controlling channel resource configuration,
  • all resource elements in the resource unit group are cyclically numbered according to the order of the pre-frequency domain or the first-time domain and the post-frequency domain;
  • a resource element with the same number is grouped into a short resource element group.
  • the resource unit group is N resource units that are consecutive or dispersed in a frequency domain within a short TTI, and N is a positive integer greater than 1.
  • the resource unit occupies all OFDM symbols in a short TTI in the time domain, occupies consecutive X1 subcarriers in the frequency domain, or occupies consecutive X2 resource blocks, where X1 and X2 are greater than or equal to 1 Positive integer.
  • the short TTI is composed of Y consecutive OFDM symbols in the time domain, Y is a positive integer greater than or equal to 1, and the length of the short TTI is less than 1 ms.
  • the Y is equal to 2 or Y is equal to 7.
  • each resource element group includes M short resource element groups, M is a positive integer greater than or equal to 1, and the short resource element group is numbered from 0 to M-1.
  • the resource elements in each resource unit group are numbered from 0 to M-1 in the order of the pre-frequency domain post-time domain or the pre-time domain post-frequency domain.
  • the determining the number of short resource element groups corresponding to one resource unit group includes:
  • the time domain after the frequency domain is numbered, if the number resource element is the highest resource element in the frequency domain within the resource unit group on one OFDM symbol P, the next number resource element is the next OFDM symbol P+ 1 is the lowest resource element in the frequency domain group, P is an integer greater than or equal to 0, and OFDM symbol P+1 is an OFDM symbol in the short TTI; or
  • the number resource element is a resource element corresponding to the last OFDM symbol in the short TTI on one subcarrier Z
  • the next number resource element is A resource element corresponding to the first OFDM symbol in the short TTI on the subcarrier Z+1
  • Z is an integer greater than or equal to 0
  • the subcarrier Z+1 is a subcarrier within the resource unit group.
  • an apparatus for configuring a control channel resource based on DMRS demodulation in a short TTI including:
  • a determining module configured to determine a number of short resource element groups corresponding to one resource unit group in the short TTI control region
  • a numbering module configured to cyclically number all the resource elements RE in the resource unit group according to the number of short resource element groups according to the order of the first frequency domain or the first time domain;
  • a processing module for grouping resource elements having the same number into a short resource element group
  • the resource unit group is N resource units that are consecutive or dispersed in a frequency domain within a short TTI, and N is a positive integer greater than 1.
  • the resource unit occupies all OFDM symbols in a short TTI in the time domain, occupies consecutive X1 subcarriers in the frequency domain, or occupies consecutive X2 RBs, where X1 and X2 are greater than or equal to 1.
  • the short TTI is composed of Y consecutive OFDM symbols in the time domain, Y is a positive integer greater than or equal to 1, and the length of the short TTI is less than 1 ms.
  • the Y is equal to 2 or Y is equal to 7.
  • each resource element group includes M short resource element groups, M is a positive integer greater than or equal to 1, and the short resource element group is numbered from 0 to M-1.
  • the resource elements in each resource unit group are numbered from 0 to M-1 in the order of the pre-frequency domain post-time domain or the pre-time domain post-frequency domain.
  • the determining module is further configured to: determine, according to the quantity of resource elements in the resource unit group, the number of short resource element groups, where
  • the numbering module is further configured to:
  • the time domain is numbered in the time domain, if the numbered resource element is on an OFDM symbol P
  • the highest resource element in the frequency domain of the resource unit group, the next number resource element is the lowest resource element in the frequency domain of the resource unit group on the next OFDM symbol P+1, and P is an integer greater than or equal to 0, OFDM
  • the symbol P+1 is an OFDM symbol within the short TTI; or
  • the numbered resource element is a resource element corresponding to the last OFDM symbol in the short TTI on one subcarrier Z
  • the next numbered resource element is a short TTI on the subcarrier Z+1.
  • a resource element corresponding to the first OFDM symbol, Z is an integer greater than or equal to 0, and subcarrier Z+1 is a subcarrier within the resource unit group.
  • an apparatus for configuring a control channel resource based on DMRS demodulation in a short TTI including:
  • transceiver for receiving and transmitting data under the control of the processor
  • the processor is configured to do the following:
  • all resource elements in the resource unit group are cyclically numbered according to the order of the first frequency domain or the first time domain;
  • a resource element with the same number is grouped into a short resource element group.
  • a non-transitory computer readable storage medium storing computer readable instructions executable by a processor, When a read instruction is executed by a processor, the processor performs the following operations:
  • all resource elements in the resource unit group are cyclically numbered according to the order of the first frequency domain or the first time domain;
  • a resource element with the same number is grouped into a short resource element group.
  • One technical solution in the foregoing technical solution has the following advantages or advantages: first, determining the number of SREGs corresponding to one RUG in the short TTI control region; and then, according to the number of SREGs, according to the first frequency domain after all REs in the RUG The sequential cyclic number of the domain or the time domain of the first time domain; the REs with the same number are combined into one SREG, and the resources of the control channel based on DMRS demodulation are configured in the control region, so that the short TTI can use the downlink based on DMRS demodulation Control channel.
  • FIG. 1 is a schematic diagram of a frame structure used by an existing LTE FDD system
  • FIG. 2 is a schematic diagram of a frame structure used by an existing LTE TDD system
  • 3 is a schematic diagram of an existing downlink resource grid
  • FIG. 4 is a flowchart of a method for configuring a control channel resource in a short TTI according to an embodiment of the present disclosure
  • 5A-5C are schematic diagrams of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure
  • 6A-6B are schematic diagrams of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure
  • 9A-9C are schematic diagrams of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure.
  • 10A-10C are schematic diagrams of mapping of resource elements in a short TTI control region according to an embodiment of the present disclosure
  • 11 is a block diagram of an apparatus for configuring control channel resources in a short TTI in an embodiment of the present disclosure.
  • embodiments of the present disclosure may be implemented as a system, apparatus, device, method, or computer program product.
  • embodiments of the present disclosure may be embodied in the form of full hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.
  • the existing LTE FDD (Frequency Division Duplex) system uses a frame structure (frame structure type 1, FS1 for short), and its structure is as shown in FIG. 1.
  • frame structure type 1, FS1 for short the uplink and downlink transmissions use different carrier frequencies, and both the uplink and downlink transmissions use the same frame structure.
  • a 10ms length radio frame contains 10 1ms subframes within each subframe. It is divided into two time slots of 0.5 ms long.
  • the TTI duration of uplink and downlink data transmission is 1 ms.
  • the existing LTE TDD (Time Division Duplex) system uses a frame structure type 2 (FS2), as shown in FIG. 2 .
  • FS2 frame structure type 2
  • uplink and downlink transmissions use different subframes or different time slots on the same frequency.
  • Each 10 ms radio frame in FS2 consists of two 5 ms half frames, each of which contains five subframes of 1 ms length.
  • the sub-frames in FS2 are classified into three types: downlink sub-frames, uplink sub-frames, and special sub-frames.
  • Each special sub-frame consists of a Downlink Pilot Time Slot (DwPTS) and a Guard Period (GP).
  • Uplink Pilot Time Slot (UpPTS) is composed of three parts.
  • the DwPTS can transmit the downlink pilot, the downlink service data and the downlink control signaling; the GP does not transmit any signal; the UpPTS only transmits the random access and sounding reference symbol (SRS), and cannot transmit the uplink service or the uplink control information.
  • Each field includes at least one downlink subframe and at least one uplink subframe, and at most one special subframe. Table 7 lists the seven uplink and downlink subframe configurations supported by FS2.
  • the minimum resource granularity in the time domain is one OFDM symbol
  • the minimum resource granularity in the frequency domain is one subcarrier.
  • (k, l) is the number of a basic resource element (RE).
  • PRB physical resource element
  • RE composition is a PRB pair in a subframe.
  • the PRB pair is the basic unit of data resource allocation. See Figure 3.
  • Step 401 determining the number of short resource element groups corresponding to a resource unit group in the short TTI control area, and then proceeds to step 402;
  • step 401 is: determining the number of SREGs according to the number of resource elements in the resource unit group.
  • the number of SREGs can also be determined in other manners in this embodiment.
  • Step 402 According to the number of SREGs, all resource elements in the resource unit group are cyclically numbered according to the order of the first frequency domain or the first time domain and then the frequency domain, and then enter 403;
  • Step 403 grouping resource elements having the same number into one SREG.
  • the resource unit group (RU group) is a continuous or distributed N resource unit (RE unit) in a short TTI internal frequency domain, and N is a positive integer greater than 1.
  • the resource unit occupies all OFDM symbols in a short TTI in the time domain, occupies consecutive X1 subcarriers in the frequency domain, or occupies consecutive X2 RBs, where X1 and X2 are positive integers greater than or equal to 1.
  • the size of the resource unit group is related to the time domain length of the short TTI.
  • the short resource element group (Shoreened Resource Element Group, SREG for short) is a mapping resource unit of the control channel in the control region on the short TTI.
  • one SREG is composed of multiple resource elements (REs) in the same resource unit group, each resource unit group contains M SREGs, and M is a positive integer greater than or equal to 1, for example, M equals 4 or M. Equal to 16, each SREG is numbered from 0 to M-1.
  • REs resource elements
  • the resource elements in each resource unit group are numbered according to 0 to M-1, and the loop number may be: the first frequency domain back time domain, or the first time domain post-frequency domain.
  • the number starts from the lowest resource element in the frequency domain of the first OFDM symbol of the short TTI and spans different resource elements within the resource unit group. When the number reaches M-1, the number is restarted from 0.
  • the numbered resource element is the highest resource element in the frequency domain within the resource unit group on an OFDM symbol P (P is an integer greater than or equal to 0), the next number resource element The lowest one resource element in the frequency domain within the resource unit group on the next OFDM symbol P+1 (OFDM symbol P+1 is the OFDM symbol in the short TTI).
  • the numbered resource element is a resource element corresponding to the last OFDM symbol in the short TTI on one subcarrier Z (Z is an integer greater than or equal to 0)
  • the next number resource element is a resource element corresponding to the first OFDM symbol in the short TTI on the subcarrier Z+1 (subcarrier Z+1 is a subcarrier in the resource unit group).
  • the value of the foregoing M is related to the total number of resource elements in the resource unit group, and the more the number of resource elements in the resource unit group, the more the number of short resource element groups; the resource elements in the resource unit group The smaller the number, the smaller the number of short resource element groups.
  • the short TTI is composed of Y consecutive OFDM symbols in the time domain, for example, Y is equal to 2 or Y is equal to 7, and the short TTI is less than 1 ms. It is to be understood that Y is not limited in this embodiment. The specific value.
  • RU group consists of 3 RUs and 4 RUGs in one RU group, all resource elements in the RU group (RE) ), according to the order of the first frequency domain or the time domain of the first time domain, the number range is 0, 1, 2, 3.
  • REs with the same number form an SREG.
  • SREG0 consists of all REs numbered
  • SREG1 consists of all REs numbered 1, and so on.
  • each RU group consists of three RUs and one RU group contains six SREGs
  • all RE elements in the RU group are numbered in the order of the pre-frequency domain or the time domain and the frequency domain.
  • the range is 0, 1, 2, 3, 4, 5.
  • SREG0 consists of all REs numbered
  • SREG1 consists of all REs numbered 1, and so on.
  • each RU group consists of 4 RUs and 11 RUGs are included in one RU group
  • all REs in the RU group are numbered in the order of the pre-frequency domain or the first-time domain and the post-frequency domain. It is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
  • SREG0 consists of all REs numbered
  • SREG1 consists of all REs numbered 1, and so on.
  • the numbering may start from the lowest one RE in the frequency domain of the first OFDM symbol of the short TTI and span different RUs in the RU group. When the number reaches M-1, the number is restarted from 0.
  • the time domain of the pre-frequency domain is numbered, if the number RE is an OFDM symbol P (P is An integer greater than or equal to 0) The highest RE in the inner frequency domain of the RU group, and the next number RE is the next OFDM symbol P+1 (the OFDM symbol P+1 is the OFDM symbol in the short TTI) The lowest RE in the inner frequency domain.
  • P is An integer greater than or equal to 0
  • the next number RE is a subcarrier.
  • Z+1 subcarrier Z+1 is a subcarrier in the RU group
  • each RU group consists of 2 RUs and 16 RUGs are included in one RU group
  • all RE elements in the RU group are cyclically numbered according to the order of the time domain and the time domain.
  • Cycle number, number range 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15.
  • REs with the same number form an SREG.
  • SREG0 consists of all REs numbered
  • SREG1 consists of all REs numbered 1, and so on.
  • mapping process of the RE in the SREG is the same as the short TTI in which the time domain length includes two OFDM symbols, and is not described here.
  • a short TTI time domain includes 2 OFDM symbols
  • the SREG resource mapping is as shown in FIGS. 5A to 5C.
  • the RE included in the SREG does not include the RE occupied by the DMRS for control channel demodulation.
  • each RU group includes four SREGs, and each SREG is composed of REs having the same label in the RU group.
  • FIG. 5A shows that the short TTI includes only the DMRS for the control channel demodulation in the short TTI, and does not include the CRS AP or the CSI-RS AP;
  • FIG. 5B shows that the short TTI includes the DMRS for the control channel demodulation in the short TTI and One CRS AP;
  • FIG. 5C shows that the short TTI includes a DMRS for control channel demodulation in a short TTI and a CRS AP and a CSI-RS AP.
  • the location of the DMRS is assumed to be within a short TTI of other locations and density distributions. For example, SREG0 consists of all REs whose RE number is 0 in the RU group.
  • the REs that make up the SREG may be CRS or CSI-RS is occupied. As shown in FIGS. 5B and 5C, the REs occupied by the CRS AP and the CSI-RS AP can still serve as the RE of the SREG.
  • the RE of the SREG is excluded from the RE that may be occupied by the DMRS.
  • the SREG may include the RE occupied by the DMRS.
  • the RE included in the SREG does not include the RE occupied by the DMRS for control channel demodulation.
  • each RU group includes 16 SREGs, and each SREG is composed of REs having the same label in the RU group.
  • FIG. 6A shows a control region including a legacy (legacy) LTE system in a short TTI (assuming 2 OFDM symbols), including a DMRS for control channel demodulation in a short TTI, including 4 CRS ports and 8 CSI-RSs. Port; Figure 6B shows the DMRS and the four CRS ports for the control channel demodulation in the short TTI within the short TTI.
  • SREG0 consists of all REs whose RE number is 0 in the RU group.
  • the REs that make up the SREG may be occupied by CRS or CSI-RS.
  • the REs occupied by the CRS or CSI-RS ports are still calculated into the REs contained in the SREG.
  • SREG0, FIGS. 6A to 6B each contain 10 REs.
  • the number of REs contained in different SREGs may be different.
  • the RE of the SREG is excluded from the RE that may be occupied by the DMRS.
  • the SREG may include the RE occupied by the DMRS.
  • the resource mapping method of the SREG first time domain post-frequency domain is applicable to this embodiment.
  • the short TTI time domain includes 2 OFDM symbols
  • the SREG resource mapping is shown in Figure 7.
  • the bandwidth allocated to the short TTI is 10 RUs
  • the RU number is from 0 to 9.
  • the RU group is composed of RU0, RU4, and RU8. As shown in FIG.
  • each RU group includes 4 SREGs, and each SREG is composed of REs having the same label in the RU group, and the REs included in the SREG do not include REs occupied by DMRSs for control channel demodulation.
  • (a) indicates that the short TTI includes only the DMRS for control channel demodulation in the short TTI, and does not include the CRS AP or the CSI-RS AP;
  • (b) indicates that the short TTI includes the control channel demodulation for the short TTI.
  • table The short TTI includes a DMRS for control channel demodulation in a short TTI and a CRS AP and a CSI-RS AP.
  • SREG0 consists of all REs whose RE number is 0 in the RU group.
  • the REs that make up the SREG may be occupied by CRS or CSI-RS.
  • the REs occupied by the CRS AP and the CSI-RS AP can still serve as the RE of the SREG.
  • the RE of the SREG is excluded from the RE that may be occupied by the DMRS.
  • the SREG may include the RE occupied by the DMRS.
  • the resource mapping method of the SREG first time domain post-frequency domain is applicable to this embodiment.
  • the short TTI time domain includes 7 OFDM symbols
  • the RE included in the SREG does not include the RE occupied by the DMRS for control channel demodulation.
  • each RU group includes 16 SREGs, and each SREG is composed of REs having the same label in the RU group.
  • SREG0 consists of all REs whose RE number is 0 in the RU group.
  • the REs that make up the SREG may be occupied by CRS or CSI-RS.
  • the REs occupied by the CRS or CSI-RS ports are still calculated into the REs contained in the SREG.
  • SREG0, (a) and (b) each contain 10 REs. The number of REs contained in different SREGs may be different.
  • the RE of the SREG is excluded from the RE that may be occupied by the DMRS.
  • the SREG may include the RE occupied by the DMRS.
  • the resource mapping method of the SREG first time domain post-frequency domain is applicable to this embodiment.
  • the short TTI time domain includes 2 OFDM symbols
  • the SREG resource mapping is as shown in FIG. 9A to FIG. 9C.
  • the RE included in the SREG does not include the RE occupied by the DMRS for control channel demodulation.
  • each RU group includes 11 SREGs, and each SREG is included in the RU group.
  • the same number of REs are composed.
  • FIG. 9A shows that the short TTI includes only the DMRS for the control channel demodulation in the short TTI, and does not include the CRS AP or the CSI-RS AP;
  • FIG. 9B shows that the short TTI includes the DMRS for the control channel demodulation in the short TTI and One CRS AP;
  • FIG. 9C shows that the short TTI includes a DMRS for control channel demodulation in a short TTI and a CRS AP and a CSI-RS AP.
  • the location of the DMRS is assumed to be within a short TTI of other locations and density distributions. For example, SREG0 consists of all REs whose RE number is 0 in the RU group.
  • the REs that make up the SREG may be occupied by CRS or CSI-RS. As shown in FIG. 9B and FIG. 9C, the REs occupied by the CRS AP and the CSI-RS AP can still serve as the RE of the SREG.
  • the RE of the SREG is excluded from the RE that may be occupied by the DMRS.
  • the SREG may include the RE occupied by the DMRS.
  • the resource mapping method of the SREG first time domain post-frequency domain is applicable to this embodiment.
  • the mapping of the SREG is preceded by the time domain and the subsequent frequency domain.
  • the RE included in the SREG does not include the RE occupied by the DMRS for control channel demodulation.
  • each RU group includes seven SREGs, and each SREG is composed of REs having the same label in the RU group.
  • FIG. 10A shows that the short TTI includes only the DMRS for the control channel demodulation in the short TTI, and does not include the CRS AP or the CSI-RS AP;
  • FIG. 10B shows that the short TTI includes the DMRS for the control channel demodulation in the short TTI and One CRS AP;
  • FIG. 10C shows that the short TTI includes a DMRS for control channel demodulation in a short TTI and a CRS AP and a CSI-RS AP.
  • the location of the DMRS is assumed to be within a short TTI of other locations and density distributions. For example, SREG0 consists of all REs whose RE number is 0 in the RU group.
  • the REs that make up the SREG may be occupied by CRS or CSI-RS. As shown in FIGS. 10B and 10C, the REs occupied by the CRS AP and the CSI-RS AP can still serve as the RE of the SREG.
  • the RE of the SREG is excluded from the RE that may be occupied by the DMRS.
  • the SREG may include the RE occupied by the DMRS.
  • an apparatus for configuring a control channel resource based on DMRS demodulation in a short TTI comprising:
  • a determining module 1101 configured to determine a quantity of short resource element groups SREG corresponding to one resource unit group RUG in the short TTI control region;
  • the numbering module 1102 is configured to cyclically number all the resource elements RE in the resource unit group according to the number of short resource element groups SREG according to the order of the first frequency domain or the first time domain.
  • the processing module 1103 is configured to group the resource elements RE having the same number into a short resource element group SREG.
  • the resource unit group RUG is N consecutive resource elements RU in a frequency domain within a short TTI, and N is a positive integer greater than 1.
  • the resource unit RU occupies all OFDM symbols in a short TTI in the time domain, occupies consecutive X1 subcarriers in the frequency domain, or occupies consecutive X2 RBs, where X1 and X2 are greater than or equal to 1 Positive integer.
  • the short TTI is composed of Y consecutive OFDM symbols in the time domain, Y is a positive integer greater than or equal to 1, and the length of the short TTI is less than 1 ms.
  • the Y is equal to 2 or Y is equal to 7.
  • each resource element group includes M short resource element groups, M is a positive integer greater than or equal to 1, and the short resource element group is numbered from 0 to M-1.
  • the resource elements in each resource unit group are numbered from 0 to M-1 in the order of the pre-frequency domain post-time domain or the pre-time domain post-frequency domain.
  • the value of the M is related to the total number of resource elements in the resource unit group.
  • the determining module is further configured to: determine, according to the quantity of resource elements RE in the resource unit group RUG, the number of short resource element groups SREG, where the number of resource elements RE in the resource unit group RUG The more the number of short resource element groups SREG, the smaller the number of resource elements RE in the resource unit group RUG, and the smaller the number of short resource element groups SREG.
  • the numbering module is further configured to: when the first frequency domain is numbered, if the numbered resource element is the highest resource element in the frequency domain of the resource unit group on one OFDM symbol P, the next number resource The element is in the inner frequency domain of the resource unit group on the next OFDM symbol P+1
  • the lowest one resource element, P is an integer greater than or equal to 0, and the OFDM symbol P+1 is an OFDM symbol within the short TTI; or
  • the numbered resource element is a resource element corresponding to the last OFDM symbol in the short TTI on one subcarrier Z
  • the next numbered resource element is a short TTI on the subcarrier Z+1.
  • a resource element corresponding to the first OFDM symbol, Z is an integer greater than or equal to 0, and subcarrier Z+1 is a subcarrier within the resource unit group.
  • the resources of the control channel based on the DMRS demodulation are configured in the control region, so that the short TTI can use the downlink control channel based on DMRS demodulation.
  • system and “network” are used interchangeably herein.
  • B corresponding to A means that B is associated with A, and B can be determined from A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the disclosed method and apparatus may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • a direct coupling or communication connection may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be physically included 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 hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network side device, etc.) to perform part of the steps of the transceiving method of the various embodiments of the present disclosure.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.

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Abstract

本公开实施例提供了一种短TTI中基于DMRS解调的控制信道资源配置的方法及装置，该方法包括：确定短TTI控制区域中一个资源单元组对应的短的资源元素组的数量；根据短的资源元素组的数量，对资源单元组内所有资源元素，按照先频域后时域或者先时域后频域的顺序循环编号；将具有相同编号的资源元素组成一个短的资源元素组。

Description

短TTI中基于DMRS解调的控制信道资源配置的方法及装置
相关申请的交叉引用
本申请主张在2016年8月5日在中国国家知识产权局提交的第201610638664.X号中国专利申请的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种短TTI(Transmission Time Interval，传输时间间隔)中基于DMRS(Demodulation Reference Signal，解调参考信号)解调的控制信道资源配置的方法及装置。
背景技术
移动互联网正在颠覆传统移动通信业务模式，为用户提供前所未有的使用体验，深刻影响着人们工作生活的方方面面。移动互联网将推动人类社会信息交互方式的进一步升级，为用户提供增强现实、虚拟现实、超高清(3D)视频、移动云等更加丰富的业务体验。移动互联网的进一步发展将带来未来移动流量超千倍增长，推动移动通信技术和产业的新一轮变革。而物联网则扩展了移动通信的服务范围，从人与人通信延伸到人与物、物与物智能互联，使移动通信技术渗透至更加广阔的行业和领域。未来，移动医疗、车联网、智能家居、工业控制、环境监测等将会推动物联网应用爆发式增长，数以千亿的设备将接入网络，实现真正的“万物互联”。同时，海量的设备连接和多样化的物联网业务也会给移动通信带来新的技术挑战。
随着新的业务需求的持续出现和丰富，对未来移动通信系统提出了更高的性能需求，例如更高的峰值速率、更好的用户体验速率、更小的时延、更高的可靠性、更高的频谱效率和更高的能耗效率等，并需要支持更多的用户接入以及使用各种业务类型。为了支持数量巨大的各类终端连接以及不同的业务类型，上下行资源的灵活配置成为技术发展的一大趋势。未来的系统资源可以根据业务的不同，划分成不同的子带，并在子带上划分长度不同的TTI，以满足多种业务需求。
现有LTE(Long Term Evolution，长期演进)下行控制信道
LTE系统的PDCCH(physical downlink control channel，物理下行控制信道)用于承载调度信息以及其他控制信息。每个下行子帧的控制区域内可以有多个PDCCH，控制区域的大小由PCFICH(Physical Control Format Indicator Channel，物理控制格式指示信道)决定，占1～4个OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)符号。一个控制信道的传输占用一个CCE(control channel element，控制信道单元)或者多个连续的CCE，每个CCE由9个REG(resource element group，资源单元组)组成，且PDCCH的CCE所包含的REG为没有用于承载PCFICH和PHICH(物理混合自动重传指示信道)的REG。
为了扩展PDCCH的容量，在Rel-11引入了EPDCCH(Enhanced Physical Downlink Control Channel，增强物理下行控制信道)。EPDCCH在子帧中的数据区域进行传输，不能占用PDCCH的传输空间。与PDCCH类似，引入了EREG(enhanced resource element group，增强的资源单元组)与ECCE(enhanced control channel element，增强的控制信道单元)的概念。
在现有LTE系统中，TTI长度固定为1ms，承载EPDCCH的EREG和ECCE是以PRB pair为单位进行定义的。一个PRB pair中包含12个子载波以及14(normal CP)或者12(extended CP)个OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)符号，EREG由PRB pair内除去DMRS的RE(resource element，资源元素)组成。TTI长度越短，TTI内频域上12个子载波所包含的RE资源越少。
但是在LTE系统的现有标准中，并没有提出短TTI中基于DMRS解调的控制信道的资源在控制区域中如何配置的具体方案。
发明内容
鉴于上述技术问题，本公开实施例提供一种短TTI中基于DMRS解调的控制信道资源配置的方法及装置，实现基于DMRS解调的控制信道的资源在控制区域中配置，使短TTI能够使用基于DMRS解调的下行控制信道。
依据本公开实施例的第一方面，提供了一种短TTI中基于DMRS解调的 控制信道资源配置的方法，
确定短TTI控制区域中一个资源单元组对应的短的资源元素组的数量；
根据短的资源元素组的数量，对资源单元组内所有资源元素，按照先频域后时域或者先时域后频域的顺序循环编号；
将具有相同编号的资源元素组成一个短的资源元素组。
可选地，所述资源单元组为短TTI内频域上连续的或者分散的N个资源单元，N为大于1的正整数。
可选地，所述资源单元，在时域上占据短TTI内的所有OFDM符号，频域上占据连续的X1个子载波，或者占据连续的X2个资源块，其中，X1、X2为大于等于1的正整数。
可选地，所述短TTI的时域长度越长，则N的取值越小；短TTI的时域长度越短，则N的取值越大。
可选地，所述短TTI在时域上由Y个连续的OFDM符号组成，Y为大于等于1的正整数，所述短TTI的长度小于1ms。
可选地，所述Y等于2或Y等于7。
可选地，每个资源单元组内包含M个短的资源元素组，M为大于等于1的正整数，短的资源元素组的编号从0到M-1。
可选地，所述每个资源单元组内的资源元素，按照先频域后时域或者先时域后频域的顺序，从0到M-1循环编号。
可选地，所述确定一个资源单元组对应的短的资源元素组的数量，包括：
根据资源单元组内资源元素的数量，确定短的资源元素组的数量，
其中，所述资源单元组内资源元素的数量越多，短的资源元素组的数量越多；所述资源单元组内资源元素的数量越少，短的资源元素组的数量越少。
可选地，当先频域后时域进行编号时，如果编号资源元素为一个OFDM符号P上资源单元组内频域上最高的一个资源元素，则下一个编号资源元素为下一个OFDM符号P+1上资源单元组内频域上最低的一个资源元素，P为大于等于0的整数，OFDM符号P+1为所述短TTI内的OFDM符号；或者
当先时域后频域进行编号时，如果编号资源元素为一个子载波Z上的所述短TTI内最后一个OFDM符号对应的资源元素，则下一个编号资源元素为 子载波Z+1上短TTI中第一个OFDM符号对应的资源元素，Z为大于等于0的整数，子载波Z+1为资源单元组内的子载波。
依据本公开实施例的第二方面，还提供了一种短TTI中基于DMRS解调的控制信道资源配置的装置，包括：
确定模块，用于确定短TTI控制区域中一个资源单元组对应的短的资源元素组的数量；
编号模块，用于根据短的资源元素组的数量，对资源单元组内所有资源元素RE，按照先频域后时域或者先时域后频域的顺序循环编号；
处理模块，用于将具有相同编号的资源元素组成一个短的资源元素组。
可选地，所述资源单元组为短TTI内频域上连续的或者分散的N个资源单元，N为大于1的正整数。
可选地，所述资源单元，在时域上占据短TTI内的所有OFDM符号，频域上占据连续的X1个子载波，或者占据连续的X2个RB，其中，X1、X2为大于等于1的正整数。
可选地，所述短TTI的时域长度越长，则N的取值越小；短TTI的时域长度越短，则N的取值越大。
可选地，所述短TTI在时域上由Y个连续的OFDM符号组成，Y为大于等于1的正整数，所述短TTI的长度小于1ms。
可选地，所述Y等于2或Y等于7。
可选地，每个资源单元组内包含M个短的资源元素组，M为大于等于1的正整数，短的资源元素组的编号从0到M-1。
可选地，所述每个资源单元组内的资源元素，按照先频域后时域或者先时域后频域的顺序，从0到M-1循环编号。
可选地，所述确定模块进一步用于：根据资源单元组内资源元素的数量，确定短的资源元素组的数量，其中，
其中，所述资源单元组内资源元素的数量越多，短的资源元素组的数量越多；所述资源单元组内资源元素的数量越少，短的资源元素组的数量越少。
可选地，所述编号模块进一步用于：
当先频域后时域进行编号时，如果编号资源元素为一个OFDM符号P上 资源单元组内频域上最高的一个资源元素，则下一个编号资源元素为下一个OFDM符号P+1上资源单元组内频域上最低的一个资源元素，P为大于等于0的整数，OFDM符号P+1为所述短TTI内的OFDM符号；或者
当先时域后频域进行编号时，如果编号资源元素为一个子载波Z上的所述短TTI内最后一个OFDM符号对应的资源元素，则下一个编号资源元素为子载波Z+1上短TTI中第一个OFDM符号对应的资源元素，Z为大于等于0的整数，子载波Z+1为资源单元组内的子载波。
依据本公开实施例的第三方面，还提供了一种短TTI中基于DMRS解调的控制信道资源配置的装置，包括：
处理器；以及
收发机，用于在所述处理器的控制下接收和发送数据，
所述处理器配置为执行以下操作：
确定短TTI控制区域中一个资源单元组对应的短的资源元素组的数量；
根据短的资源元素组的数量，对资源单元组内所有资源元素，按照先频域后时域或者先时域后频域的顺序循环编号；以及
将具有相同编号的资源元素组成一个短的资源元素组。
依据本公开实施例的第四方面，还提供了一种非易失性计算机可读存储媒介，所述计算机可读存储媒介存储有能够被处理器执行的计算机可读指令，当所述计算机可读指令被处理器执行时，所述处理器执行以下操作：
确定短TTI控制区域中一个资源单元组对应的短的资源元素组的数量；
根据短的资源元素组的数量，对资源单元组内所有资源元素，按照先频域后时域或者先时域后频域的顺序循环编号；以及
将具有相同编号的资源元素组成一个短的资源元素组。
上述技术方案中的一个技术方案具有如下优点或有益效果：首先，确定短TTI控制区域中一个RUG对应的SREG的数量；然后，根据SREG的数量，对RUG内所有RE，按照先频域后时域或者先时域后频域的顺序循环编号；将具有相同编号的RE组成一个SREG，实现基于DMRS解调的控制信道的资源在控制区域中配置，使短TTI能够使用基于DMRS解调的下行控制 信道。
附图说明
图1为现有的LTE FDD系统使用帧结构示意图；
图2为现有的LTE TDD系统使用帧结构示意图；
图3为现有的下行资源网格示意图；
图4为本公开实施例中短TTI中控制信道资源配置的方法的流程图；
图5A～图5C为本公开实施例中短TTI控制区域资源单元的映射示意图；
图6A～图6B为本公开实施例中短TTI控制区域资源单元的映射示意图；
图7为本公开实施例中短TTI控制区域资源单元的映射示意图；
图8为本公开实施例中短TTI控制区域资源单元的映射示意图；
图9A～图9C为本公开实施例中短TTI控制区域资源单元的映射示意图；
图10A～图10C为本公开实施例中短TTI控制区域资源单元的映射示意图；
图11为本公开实施例中短TTI中控制信道资源配置的装置的框图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
本领域技术人员知道，本公开的实施方式可以实现为一种系统、装置、设备、方法或计算机程序产品。因此，本公开的实施例可以具体实现为以下形式：完全的硬件、完全的软件(包括固件、驻留软件、微代码等)，或者硬件和软件结合的形式。
现有LTE FDD(Frequency Division Duplex，频分双工)系统使用帧结构(frame structure type 1，简称FS1)，其结构如图1所示。在FDD系统中，上行和下行传输使用不同的载波频率，上行和下行传输均使用相同的帧结构。在每个载波上，一个10ms长度的无线帧包含有10个1ms子帧，每个子帧内 由分为两个0.5ms长的时隙。上行和下行数据发送的TTI时长为1ms。
现有LTE TDD(Time Division Duplex，时分双工)系统使用帧结构(frame structure type 2，简称FS2)，如图2所示。在TDD系统中，上行和下行传输使用相同的频率上的不同子帧或不同时隙。FS2中每个10ms无线帧由两个5ms半帧构成，每个半帧中包含5个1ms长度的子帧。FS2中的子帧分为三类：下行子帧、上行子帧和特殊子帧，每个特殊子帧由下行传输时隙(Downlink Pilot Time Slot，简称DwPTS)、保护间隔(Guard Period，简称GP)和上行传输时隙(Uplink Pilot Time Slot，简称UpPTS)三部分构成。其中DwPTS可以传输下行导频，下行业务数据和下行控制信令；GP不传输任何信号；UpPTS仅传输随机接入和探测参考信号(Sounding Reference Symbol，简称SRS)，不能传输上行业务或上行控制信息。每个半帧中包含至少1个下行子帧和至少1个上行子帧，以及至多1个特殊子帧。FS2中支持的7种上下行子帧配置方式如表1所示。
表1：Uplink-downlink configurations
Figure PCTCN2017095433-appb-000001
现有LTE下行资源粒度：
在现有LTE中，时域上最小资源粒度为一个OFDM符号，频域上最小资源粒度为一个子载波。(k，l)为一个基本资源元素(resource element，简称RE)的编号。其中
Figure PCTCN2017095433-appb-000002
PRB(physical resource element，物理资源单元)是更大维度的资源单元，由
Figure PCTCN2017095433-appb-000003
个RE组成。一个subframe中有一个PRB pair，PRB pair是数据资源分配的基本单位，参见图3。
参见图4，图中示出了一种短TTI中控制信道资源配置的方法，具体步骤如下：
步骤401、确定短TTI控制区域中一个资源单元组对应的短的资源元素组的数量，然后进入步骤402；
可选地，步骤401的实现方式为：根据资源单元组内资源元素的数量，确定SREG的数量。当然可以理解的是，在本实施例中还可以通过其他方式确定SREG的数量。
步骤402、根据SREG的数量，对资源单元组内所有资源元素，按照先频域后时域或者先时域后频域的顺序循环编号，然后进入403；
步骤403、将具有相同编号的资源元素组成一个SREG。
上述资源单元组(RU group，简称RUG)为短TTI内频域上连续的或分散的N个资源单元(resource unit，简称RU)，N为大于1的正整数。
上述资源单元，在时域上占据短TTI内的所有OFDM符号，频域上占据连续的X1个子载波，或者占据连续的X2个RB，其中，X1、X2为大于等于1的正整数。
可选地，在本实施例中，资源单元组的大小与短TTI的时域长度相关，例如，短TTI的时域长度越长，则N的取值越小；短TTI的时域长度越短，则N的取值越大。
上述短的资源元素组(Shortened Resource Element Group，简称SREG)为短TTI上控制区域内控制信道的映射资源单位。
需要说明的是，一个SREG由同一个资源单元组内的多个资源元素(RE)组成，每个资源单元组内包含M个SREG，M为大于等于1的正整数，例如M等于4或M等于16，每个SREG的编号从0至M-1。
需要说明的是，每个资源单元组内的资源元素，按照0至M-1循环编号，循环编号的方式可以是：先频域后时域，或者先时域后频域。编号从短TTI的第一个OFDM符号频域上最低的一个资源元素开始，并跨越资源单元组内的不同资源单元。当编号达到M-1时，则从0重新开始编号。
例如：当先频域后时域进行编号时，如果编号资源元素为一个OFDM符号P(P为大于等于0的整数)上资源单元组内频域上最高的一个资源元素，则下一个编号资源元素为下一个OFDM符号P+1(OFDM符号P+1为所述短TTI内的OFDM符号)上资源单元组内频域上最低的一个资源元素。
当先时域后频域进行编号时，如果编号资源元素为一个子载波Z(Z为大于等于0的整数)上的所述短TTI内最后一个OFDM符号对应的资源元素， 则下一个编号资源元素为子载波Z+1(子载波Z+1为资源单元组内的子载波)上短TTI中第一个OFDM符号对应的资源元素。
在本实施例中，上述M的取值与资源单元组内资源元素的总数相关，资源单元组内资源元素的数量越多，短的资源元素组的数量越多；资源单元组内资源元素的数量越少，短的资源元素组的数量越少。
可选地，上述短TTI在时域上由Y个连续的OFDM符号组成，例如Y等于2或者Y等于7，短TTI长度小于1ms，当然可以理解的是，在本实施例中并不限定Y的具体值。
例如：对于时域长度包含2个OFDM符号的短TTI
资源单元组(RU group)由频域上连续的或者分散的N个资源单元(RU)组成，N为大于等于1的正整数，例如N＝3或4；每个RU group内包含M个SREG，M为大于等于1的正整数，例如M＝4或者6或者11，当每个RU group由3个RU组成，且一个RU group内包含4个SREG时，RU group内的所有资源元素(RE)，按照先频域后时域或者先时域后频域的顺序循环编号，编号范围为0，1，2，3。具有相同编号的RE组成一个SREG。例如，SREG0由所有编号为0的RE组成，SREG1由所有编号为1的RE组成，以此类推。
当每个RU group由3个RU组成，且一个RU group内包含6个SREG时，RU group内的所有RE元素，按照先频域后时域或者先时域后频域的顺序循环编号，编号范围为0，1，2，3，4，5。例如，SREG0由所有编号为0的RE组成，SREG1由所有编号为1的RE组成，以此类推。
当每个RU group由4个RU组成，且一个RU group内包含11个SREG时，RU group内的所有RE，按照先频域后时域或者先时域后频域的顺序循环编号，编号范围为0，1，2，3，4，5，6，7，8，9，10。例如，SREG0由所有编号为0的RE组成，SREG1由所有编号为1的RE组成，以此类推。
需要说明的是，编号可以从短TTI的第一个OFDM符号频域上最低的一个RE开始，并跨越RU group内的不同RU。当编号达到M-1时，则从0重新开始编号。
当先频域后时域进行编号时，如果编号RE为一个OFDM符号P(P为 大于等于0的整数)上RU group内频域上最高的一个RE，则下一个编号RE为下一个OFDM符号P+1(OFDM符号P+1为所述短TTI内的OFDM符号)上RU group内频域上最低的一个RE。
当先时域后频域进行编号时，如果编号RE为一个子载波Z(Z为大于等于0的整数)上的所述短TTI内最后一个OFDM符号对应的RE，则下一个编号RE为子载波Z+1(子载波Z+1为RU group内的子载波)上短TTI中第一个OFDM符号对应的RE。
又例如：对于时域长度包含7个OFDM符号的短TTI
RU group由频域上连续的或者分散的N个RU组成，N为大于等于1的正整数，例如N＝2；每个RU group内包含M个SREG，M为大于等于1的正整数，例如M＝16；
当每个RU group由2个RU组成，且一个RU group内包含16个SREG时，RU group内的所有RE元素，按照先频域后时域的顺序循环编号或者先时域后频域的顺序循环编号，编号范围为0，1，2，3，4，5，6，7，8，9，10，11，12，13，14，15。具有相同编号的RE组成一个SREG。例如，SREG0由所有编号为0的RE组成，SREG1由所有编号为1的RE组成，以此类推。
需要说明的是，SREG中RE的映射过程与时域长度包含2个OFDM符号的短TTI相同，在此不在敷述。
在本公开实施例中，假设短TTI时域上包括2个OFDM符号，一个SREG定义的RU group内包含连续的N＝3个RU(RU N-1、RU N、RU N+1)，每个RU group内包含M＝4个SREG，则SREG资源映射如图5A～5C所示。SREG包含的RE不包括用于控制信道解调的DMRS占用的RE。如图5A～5C所示，每个RU group中包含4个SREG，每个SREG由RU group内标号相同的RE组成。其中图5A表示短TTI内只包含用于短TTI内控制信道解调的DMRS，不包含CRS AP或者CSI-RS AP；图5B表示短TTI内包含用于短TTI内控制信道解调的DMRS以及一个CRS AP；图5C表示短TTI内包含用于短TTI内控制信道解调的DMRS以及一个CRS AP和一个CSI-RS AP。DMRS的位置是假设的情况，可能以其他位置和密度分布短TTI内。例如SREG0由RU group内RE编号为0的所有RE组成。组成SREG的RE可能被CRS或者 CSI-RS占据。如图5B和5C所示，CRS AP和CSI-RS AP占据的RE仍然可以作为SREG的RE。
需要注意的是，本实施例中SREG的RE刨除了可能被DMRS占据的RE，在实际的应用当中，SREG可以包含DMRS占据的RE。
在本公开实施例中，假设短TTI时域上包括7个OFDM符号，一个SREG定义的RU group内包含连续的N＝2个RU(RU N、RU N+1)，每个RU group内包含M＝16个SREG，则SREG资源映射如图6A～6B所示。SREG包含的RE不包括用于控制信道解调的DMRS占用的RE。如图6A～6B所示，每个RU group中包含16个SREG，每个SREG由RU group内标号相同的RE组成。其中图6A表示短TTI内包含legacy(传统)LTE系统的控制区域(假设占2个OFDM符号)、包含用于短TTI内控制信道解调的DMRS，包含4个CRS端口和8个CSI-RS端口；图6B表示短TTI内包含用于短TTI内控制信道解调的DMRS以及4个CRS端口。例如SREG0由RU group内RE编号为0的所有RE组成。组成SREG的RE可能被CRS或者CSI-RS占据。被CRS或者CSI-RS端口占据的RE仍然计算到SREG包含的RE里。如图6A～6B所示的SREG0，图6A～6B均包含10个RE。不同的SREG内包含的RE数目可能不同。
需要注意的是，本实施例中SREG的RE刨除了可能被DMRS占据的RE，在实际的应用当中，SREG可以包含DMRS占据的RE。另外，SREG先时域后频域的资源映射方法适用于本实施例。
在本公开实施例中，假设短TTI时域上包括2个OFDM符号，一个SREG定义的RU group内包含不连续的N＝3个RU(RU0、RU4和RU8)，每个RU group内包含M＝4个SREG，则SREG资源映射如图7所示。在本实施例中，假设分配给短TTI的带宽为10个RU，RU编号从0到9。其中RU group由RU0、RU4、RU8组成。如图7所示，每个RU group中包含4个SREG，每个SREG由RU group内标号相同的RE组成，SREG包含的RE不包括用于控制信道解调的DMRS占用的RE。其中(a)表示短TTI内只包含用于短TTI内控制信道解调的DMRS，不包含CRS AP或者CSI-RS AP；(b)表示短TTI内包含用于短TTI内控制信道解调的DMRS以及一个CRS AP；(c)表 示短TTI内包含用于短TTI内控制信道解调的DMRS以及一个CRS AP和一个CSI-RS AP。DMRS的位置是假设的情况，可能以其他位置和密度分布短TTI内。例如SREG0由RU group内RE编号为0的所有RE组成。组成SREG的RE可能被CRS或者CSI-RS占据。如(b)(c)所示，CRS AP和CSI-RS AP占据的RE仍然可以作为SREG的RE。
需要注意的是，本实施例中SREG的RE刨除了可能被DMRS占据的RE，在实际的应用当中，SREG可以包含DMRS占据的RE。另外，SREG先时域后频域的资源映射方法适用于本实施例。
在本公开实施例中，假设短TTI时域上包括7个OFDM符号，一个SREG定义的RU group内包含分散的N＝2个RU(RU0和RU8)，例如分配带宽内的RU0和RU8。每个RU group内包含M＝16个SREG，则SREG资源映射如图8所示。SREG包含的RE不包括用于控制信道解调的DMRS占用的RE。如图8所示，每个RU group中包含16个SREG，每个SREG由RU group内标号相同的RE组成。其中(a)表示短TTI内包含legacy LTE系统的控制区域(假设占2个OFDM符号)、包含用于短TTI内控制信道解调的DMRS，包含4个CRS端口和8个CSI-RS端口；(b)表示短TTI内包含用于短TTI内控制信道解调的DMRS以及4个CRS端口。例如SREG0由RU group内RE编号为0的所有RE组成。组成SREG的RE可能被CRS或者CSI-RS占据。被CRS或者CSI-RS端口占据的RE仍然计算到SREG包含的RE里。如图所示的SREG0，(a)和(b)均包含10个RE。不同的SREG内包含的RE数目可能不同。
需要注意的是，本实施例中SREG的RE刨除了可能被DMRS占据的RE，在实际的应用当中，SREG可以包含DMRS占据的RE。另外，SREG先时域后频域的资源映射方法适用于本实施例。
在本公开实施例中，假设短TTI时域上包括2个OFDM符号，一个SREG定义的RU group内包含连续的N＝4个RU(RU N-2、RU N-1、RU N、RU N+1)，每个RU group内包含M＝11个SREG，则SREG资源映射如图9A～图9C所示。SREG包含的RE不包括用于控制信道解调的DMRS占用的RE。如图9A～图9C所示，每个RU group中包含11个SREG，每个SREG由RU group内 标号相同的RE组成。其中图9A表示短TTI内只包含用于短TTI内控制信道解调的DMRS，不包含CRS AP或者CSI-RS AP；图9B表示短TTI内包含用于短TTI内控制信道解调的DMRS以及一个CRS AP；图9C表示短TTI内包含用于短TTI内控制信道解调的DMRS以及一个CRS AP和一个CSI-RS AP。DMRS的位置是假设的情况，可能以其他位置和密度分布短TTI内。例如SREG0由RU group内RE编号为0的所有RE组成。组成SREG的RE可能被CRS或者CSI-RS占据。如图9B和图9C所示，CRS AP和CSI-RS AP占据的RE仍然可以作为SREG的RE。
需要说明的是，本实施例中SREG的RE刨除了可能被DMRS占据的RE，在实际的应用当中，SREG可以包含DMRS占据的RE。另外，SREG先时域后频域的资源映射方法适用于本实施例。
在本公开实施例中，假设短TTI时域上包括2个OFDM符号，一个SREG定义的RU group内包含连续的N＝3个RU(RU N-1、RU N、RU N+1)，每个RU group内包含M＝7个SREG，则SREG资源映射如图10A～图10C所示。在本实施例中，SREG的映射先时域后频域。SREG包含的RE不包括用于控制信道解调的DMRS占用的RE。如图10A～图10C所示，每个RU group中包含7个SREG，每个SREG由RU group内标号相同的RE组成。其中图10A表示短TTI内只包含用于短TTI内控制信道解调的DMRS，不包含CRS AP或者CSI-RS AP；图10B表示短TTI内包含用于短TTI内控制信道解调的DMRS以及一个CRS AP；图10C表示短TTI内包含用于短TTI内控制信道解调的DMRS以及一个CRS AP和一个CSI-RS AP。DMRS的位置是假设的情况，可能以其他位置和密度分布短TTI内。例如SREG0由RU group内RE编号为0的所有RE组成。组成SREG的RE可能被CRS或者CSI-RS占据。如图10B和10C所示，CRS AP和CSI-RS AP占据的RE仍然可以作为SREG的RE。
需要注意的是，本实施例中SREG的RE刨除了可能被DMRS占据的RE，在实际的应用当中，SREG可以包含DMRS占据的RE。
参见图11，图中示出了一种短TTI中基于DMRS解调的控制信道资源配置的装置，该装置1100包括：
确定模块1101，用于确定短TTI控制区域中一个资源单元组RUG对应的短的资源元素组SREG的数量；
编号模块1102，用于根据短的资源元素组SREG的数量，对资源单元组内所有资源元素RE，按照先频域后时域或者先时域后频域的顺序循环编号；
处理模块1103，用于将具有相同编号的资源元素RE组成一个短的资源元素组SREG。
可选地，所述资源单元组RUG为短TTI内频域上连续的或者分散的N个资源单元RU，N为大于1的正整数。
可选地，所述资源单元RU，在时域上占据短TTI内的所有OFDM符号，频域上占据连续的X1个子载波，或者占据连续的X2个RB，其中，X1、X2为大于等于1的正整数。
可选地，所述短TTI的时域长度越长，则N的取值越小；短TTI的时域长度越短，则N的取值越大。
可选地，所述短TTI在时域上由Y个连续的OFDM符号组成，Y为大于等于1的正整数，所述短TTI的长度小于1ms。例如，所述Y等于2或Y等于7。
可选地，每个资源单元组内包含M个短的资源元素组，M为大于等于1的正整数，短的资源元素组的编号从0到M-1。
可选地，所述每个资源单元组内的资源元素，按照先频域后时域或者先时域后频域的顺序，从0到M-1循环编号。
可选地，所述M的值与资源单元组内资源元素的总数相关。
可选地，所述确定模块进一步用于：根据资源单元组RUG内资源元素RE的数量，确定短的资源元素组SREG的数量，其中，其中，所述资源单元组RUG内资源元素RE的数量越多，短的资源元素组SREG的数量越多；所述资源单元组RUG内资源元素RE的数量越少，短的资源元素组SREG的数量越少。
可选地，所述编号模块进一步用于：当先频域后时域进行编号时，如果编号资源元素为一个OFDM符号P上资源单元组内频域上最高的一个资源元素，则下一个编号资源元素为下一个OFDM符号P+1上资源单元组内频域上 最低的一个资源元素，P为大于等于0的整数，OFDM符号P+1为所述短TTI内的OFDM符号；或者
当先时域后频域进行编号时，如果编号资源元素为一个子载波Z上的所述短TTI内最后一个OFDM符号对应的资源元素，则下一个编号资源元素为子载波Z+1上短TTI中第一个OFDM符号对应的资源元素，Z为大于等于0的整数，子载波Z+1为资源单元组内的子载波。
在本实施例中，实现基于DMRS解调的控制信道的资源在控制区域中配置，使短TTI能够使用基于DMRS解调的下行控制信道。
应理解，说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本公开的至少一个实施例中。因此，在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。
在本公开的各种实施例中，应理解，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本公开实施例的实施过程构成任何限定。
另外，本文中术语“系统”和“网络”在本文中常可互换使用。
应理解，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/或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。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请所提供的实施例中，应理解，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
在本申请所提供的几个实施例中，应该理解到，所揭露方法和装置，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，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，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或 直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
另外，在本公开各个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包括，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，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，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，或者网络侧设备等)执行本公开各个实施例所述收发方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述的是本公开的可选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本公开的原理前提下还可以做出若干改进和润饰，这些改进和润饰也在本公开的保护范围内。

Claims (22)

  1. 一种短TTI中基于DMRS解调的控制信道资源配置的方法，包括：
    确定短TTI控制区域中一个资源单元组对应的短的资源元素组的数量；
    根据短的资源元素组的数量，对资源单元组内所有资源元素，按照先频域后时域或者先时域后频域的顺序循环编号；
    将具有相同编号的资源元素组成一个短的资源元素组。
  2. 根据权利要求1所述的方法，其中，所述资源单元组为短TTI内频域上连续的或者分散的N个资源单元，N为大于1的正整数。
  3. 根据权利要求2所述的方法，其中，所述资源单元，在时域上占据短TTI内的所有OFDM符号，频域上占据连续的X1个子载波，或者占据连续的X2个资源块，其中，X1、X2为大于等于1的正整数。
  4. 根据权利要求2所述的方法，其中，所述短TTI的时域长度越长，则N的取值越小；短TTI的时域长度越短，则N的取值越大。
  5. 根据权利要求1所述的方法，其中，所述短TTI在时域上由Y个连续的OFDM符号组成，Y为大于等于1的正整数，所述短TTI的长度小于1ms。
  6. 根据权利要求5所述的方法，其中，所述Y等于2或Y等于7。
  7. 根据权利要求1所述的方法，其中，每个资源单元组内包含M个短的资源元素组，M为大于等于1的正整数，短的资源元素组的编号从0到M-1。
  8. 根据权利要求1所述的方法，其中，所述每个资源单元组内的资源元素，按照先频域后时域或者先时域后频域的顺序，从0到M-1循环编号。
  9. 根据权利要求1所述的方法，其中，所述确定一个资源单元组对应的短的资源元素组的数量，包括：
    根据资源单元组内资源元素的数量，确定短的资源元素组的数量，
    其中，所述资源单元组内资源元素的数量越多，短的资源元素组的数量越多；所述资源单元组内资源元素的数量越少，短的资源元素组的数量越少。
  10. 根据权利要求1所述的方法，其中，
    当先频域后时域进行编号时，如果编号资源元素为一个OFDM符号P上 资源单元组内频域上最高的一个资源元素，则下一个编号资源元素为下一个OFDM符号P+1上资源单元组内频域上最低的一个资源元素，P为大于等于0的整数，OFDM符号P+1为所述短TTI内的OFDM符号；或者
    当先时域后频域进行编号时，如果编号资源元素为一个子载波Z上的所述短TTI内最后一个OFDM符号对应的资源元素，则下一个编号资源元素为子载波Z+1上短TTI中第一个OFDM符号对应的资源元素，Z为大于等于0的整数，子载波Z+1为资源单元组内的子载波。
  11. 一种短TTI中基于DMRS解调的控制信道资源配置的装置，包括：
    确定模块，用于确定短TTI控制区域中一个资源单元组对应的短的资源元素组的数量；
    编号模块，用于根据短的资源元素组的数量，对资源单元组内所有资源元素RE，按照先频域后时域或者先时域后频域的顺序循环编号；
    处理模块，用于将具有相同编号的资源元素组成一个短的资源元素组。
  12. 根据权利要求11所述的装置，其中，所述资源单元组为短TTI内频域上连续的或者分散的N个资源单元，N为大于1的正整数。
  13. 根据权利要求12所述的装置，其中，所述资源单元，在时域上占据短TTI内的所有OFDM符号，频域上占据连续的X1个子载波，或者占据连续的X2个RB，其中，X1、X2为大于等于1的正整数。
  14. 根据权利要求11所述的装置，其中，所述短TTI的时域长度越长，则N的取值越小；短TTI的时域长度越短，则N的取值越大。
  15. 根据权利要求14所述的装置，其中，所述短TTI在时域上由Y个连续的OFDM符号组成，Y为大于等于1的正整数，所述短TTI的长度小于1ms。
  16. 根据权利要求15所述的装置，其中，所述Y等于2或Y等于7。
  17. 根据权利要求11所述的装置，其中，每个资源单元组内包含M个短的资源元素组，M为大于等于1的正整数，短的资源元素组的编号从0到M-1。
  18. 根据权利要求17所述的装置，其中，所述每个资源单元组内的资源元素，按照先频域后时域或者先时域后频域的顺序，从0到M-1循环编号。
  19. 根据权利要求11所述的装置，其中，所述确定模块进一步用于：根 据资源单元组内资源元素的数量，确定短的资源元素组的数量，其中，
    其中，所述资源单元组内资源元素的数量越多，短的资源元素组的数量越多；所述资源单元组内资源元素的数量越少，短的资源元素组的数量越少。
  20. 根据权利要求11所述的装置，其中，所述编号模块进一步用于：
    当先频域后时域进行编号时，如果编号资源元素为一个OFDM符号P上资源单元组内频域上最高的一个资源元素，则下一个编号资源元素为下一个OFDM符号P+1上资源单元组内频域上最低的一个资源元素，P为大于等于0的整数，OFDM符号P+1为所述短TTI内的OFDM符号；或者
    当先时域后频域进行编号时，如果编号资源元素为一个子载波Z上的所述短TTI内最后一个OFDM符号对应的资源元素，则下一个编号资源元素为子载波Z+1上短TTI中第一个OFDM符号对应的资源元素，Z为大于等于0的整数，子载波Z+1为资源单元组内的子载波。
  21. 一种短TTI中基于DMRS解调的控制信道资源配置的装置，包括：
    处理器；以及
    收发机，用于在所述处理器的控制下接收和发送数据，
    所述处理器配置为执行以下操作：
    确定短TTI控制区域中一个资源单元组对应的短的资源元素组的数量；
    根据短的资源元素组的数量，对资源单元组内所有资源元素，按照先频域后时域或者先时域后频域的顺序循环编号；以及
    将具有相同编号的资源元素组成一个短的资源元素组。
  22. 一种非易失性计算机可读存储媒介，所述计算机可读存储媒介存储有能够被处理器执行的计算机可读指令，当所述计算机可读指令被处理器执行时，所述处理器执行以下操作：
    确定短TTI控制区域中一个资源单元组对应的短的资源元素组的数量；
    根据短的资源元素组的数量，对资源单元组内所有资源元素，按照先频域后时域或者先时域后频域的顺序循环编号；以及
    将具有相同编号的资源元素组成一个短的资源元素组。
PCT/CN2017/095433 2016-08-05 2017-08-01 短tti中基于dmrs解调的控制信道资源配置的方法及装置 Ceased WO2018024193A1 (zh)

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