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WO2017114349A1 - 解调参考信令的资源配置方法、基站和用户设备 - Google Patents

解调参考信令的资源配置方法、基站和用户设备 Download PDF

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Publication number
WO2017114349A1
WO2017114349A1 PCT/CN2016/112063 CN2016112063W WO2017114349A1 WO 2017114349 A1 WO2017114349 A1 WO 2017114349A1 CN 2016112063 W CN2016112063 W CN 2016112063W WO 2017114349 A1 WO2017114349 A1 WO 2017114349A1
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WIPO (PCT)
Prior art keywords
reference signaling
unit group
resource unit
resource
physical downlink
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Ceased
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PCT/CN2016/112063
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English (en)
French (fr)
Inventor
刘仁茂
肖芳英
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Sharp Corp
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Sharp Corp
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Priority to US16/064,430 priority Critical patent/US20190058559A1/en
Priority to EP16881138.8A priority patent/EP3399814A4/en
Publication of WO2017114349A1 publication Critical patent/WO2017114349A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0806—Configuration setting for initial configuration or provisioning, e.g. plug-and-play
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • 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
    • 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
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present disclosure relates to the field of wireless communication technologies, and more particularly, to a configuration method, a base station, and a user equipment of a reference signaling resource unit for physical channel demodulation.
  • MTC Machine Type Communication
  • LTE Long Term Evolution Project
  • MTC Machine Type Communication
  • MTC is a data communication service that does not require human involvement.
  • Large-scale deployment of MTC user equipment can be used in security, tracking, billing, measurement, and consumer electronics.
  • Applications include video surveillance, supply chain tracking, smart meters, and remote monitoring.
  • MTC requires lower power consumption, supports lower data transmission rates and lower mobility.
  • the current LTE system is mainly aimed at human-to-human communication services.
  • the key to achieving the scale competitive advantage and application prospect of MTC services lies in the fact that LTE networks support low-cost MTC devices.
  • MTC equipment needs to be installed in the basement of the residential building or protected by insulated foil, metal window or thick wall of traditional buildings, compared to conventional equipment terminals (such as mobile phones, tablets, etc.) in LTE networks.
  • the air interface will obviously suffer from more severe penetration losses.
  • 3GPP decided to study the design and performance evaluation of MTC devices with additional 20dB coverage enhancement. It is worth noting that MTC devices located in poor network coverage areas have the following characteristics: very low data transmission rate, very loose latency requirements and limited Mobility.
  • the LTE network can further optimize some signaling and/or channels to better support the MTC service.
  • Non-Patent Document RP-140990 New Work Item.
  • the LTE Rel-13 system needs to support the uplink and downlink 1.4MHz RF bandwidth of the MTC user equipment to work in any system bandwidth (for example, 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz, etc.).
  • the standardization of this work item will be completed by the end of 2015.
  • NB-IoT Narrowband Internet of Thing
  • the User Equipment (UE) of the NB-IoT will support the uplink and downlink 180KHz radio frequency bandwidth.
  • the downlink transmission of LTE is based on Orthogonal Frequency Division Multiplexing (OFDM).
  • OFDM Orthogonal Frequency Division Multiplexing
  • one radio frame is divided into 10 subframes (#0 to #9).
  • Each subframe may include, for example, 2 equal-sized time slots of length 0.5 ms in the time domain, and may include, for example, 12 sub-carriers in the frequency domain.
  • Each slot includes 7 orthogonal frequency division multiplexing (OFDM) symbols.
  • the resource unit (RE) may be defined by the OFDM symbol in time and the subcarriers on the frequency, such as the time-frequency grid as shown in FIG. Wherein each RE corresponds to one subcarrier during one OFDM symbol interval.
  • a Physical Reource Block (PRB) is also defined in LTE, where each PRB consists of 12 consecutive subcarriers during one slot.
  • one subframe includes a pair of physical resource blocks, also referred to as physical resource block pairs.
  • the minimum granularity of the resource allocation of the UE is one physical resource block or a physical resource block pair, that is, multiple physical downlink shared channels of the existing LTE system in the same subframe (Physical Downlink)
  • the multiplexing between the Shared Channel, PDSCH), or the multiplexing between the PDSCH and the Enhanced Physical Downlink Control Channel (EPDCCH) is based on the PRB (or PRB pair).
  • the NB-IoT UE only supports the uplink and downlink 180 kHz RF bandwidth, which is equivalent to a PRB (or PRB pair) size of the RF bandwidth. Therefore, a PRB (or PRB pair) based multiplexing mechanism is not applicable in NB-IoT. Therefore, a new downlink channel design suitable for NB-IoT is needed. Accordingly, there is a need for a new configuration mechanism for demodulation reference signaling (DMRS) resource elements (REs) for NB-IoT.
  • DMRS demodulation reference signaling
  • Embodiments of the present disclosure provide a method for configuring a reference signaling resource unit for NB-IoT physical downlink channel demodulation, and a corresponding base station and user equipment for performing the method.
  • a base station comprising: a configuration unit configured to configure a group number of a reference signaling resource unit group for narrowband IoT physical downlink channel demodulation, wherein at least two groups are predefined a resource unit group for demodulating reference signaling of a narrowband IoT physical downlink channel; and a transmitting unit configured to send a group indicating a configured reference signaling resource unit group for demodulating a narrowband IoT physical downlink channel The indication of the number.
  • a method performed in a base station comprising: configuring a group number of a reference signaling resource unit group for narrowband IoT physical downlink channel demodulation, wherein at least two groups are predefined a resource element group for demodulating reference signaling of the narrowband IoT physical downlink channel; and transmitting indication information indicating a configured group number of the reference signaling resource unit group for demodulating the narrowband IoT physical downlink channel.
  • a user equipment including: a receiving unit, configured to receive physical downlink signaling; and an extracting unit, configured to extract, from the received physical downlink signaling, the configured usage And indication information for demodulating a group number of a reference signaling resource unit group of the narrowband IoT physical downlink channel, wherein at least two resource element groups for demodulating reference signaling of the narrowband IoT physical downlink channel are predefined in the system .
  • a method for performing in a user equipment comprising:
  • the indication information indicating the configured group number of the reference signaling resource unit group for demodulating the narrowband IoT physical downlink channel is carried in one of the following signaling: downlink control information, Media access control layer signaling, radio resource control signaling, or system information block.
  • the predefined reference signaling resource element group for demodulating the narrowband IoT physical downlink channel includes a first reference signaling resource unit group and a second reference signaling resource unit group, and A reference signaling resource unit group is a subset of the second reference signaling resource unit group.
  • the first reference signaling resource unit group is composed of 12 resource units of one physical resource block pair
  • the second reference signaling resource unit group is composed of 24 of the physical resource block pairs. Resource unit composition.
  • the first reference signaling resource unit group is located on the fifth, sixth, twelfth, and thirteenth orthogonal frequency division multiplexing on the first, sixth, and eleventh subcarriers in the physical resource block pair.
  • 12 resource units on the OFDM symbol the second reference signaling resource unit group is located at the 5th, 0th, 1st, 5th, 6th, and 11th subcarriers in the physical resource block pair.
  • the corresponding 14 OFDM symbols are numbered 0, 1, ..., 13 in chronological order.
  • the second reference signaling resource unit group is more than the first reference signaling resource unit group. It is redefined for narrowband IoT physical downlink channel transmission.
  • the predefined reference signaling resource element group for demodulating the narrowband IoT physical downlink channel comprises a first reference signaling resource unit group and a second reference signaling resource unit group, the first The reference signaling resource unit group is configured to transmit cell-specific reference signaling, the second reference signaling resource unit group is configured to transmit user equipment-specific reference signaling, and the first reference signaling resource unit group and the The intersection of the second reference signaling resource unit group is empty.
  • FIG. 1 shows a block diagram of a base station in accordance with an embodiment of the present disclosure.
  • FIG. 2 shows a block diagram of a user equipment in accordance with an embodiment of the present disclosure.
  • 3a and 3b show schematic diagrams of predefined two sets of demodulation reference signaling resource units (DMRS REs) in accordance with an embodiment of the disclosure.
  • DMRS REs demodulation reference signaling resource units
  • FIG. 4 shows a schematic diagram of a downlink subframe in an embodiment in which a downlink physical channel is multiplexed based on EREG and 24 DMRS REs are employed.
  • FIG. 5 shows a schematic diagram of a downlink subframe in an embodiment based on FDM multiplexing downlink physical channels and employing 24 DMRS REs.
  • FIG. 6 shows a schematic diagram of a downlink subframe in an embodiment in which a physical channel is multiplexed based on TDM and 24 DMRS REs are employed.
  • FIG. 7 shows a schematic diagram of a downlink subframe in an embodiment in which a physical channel is multiplexed based on EREG and 12 DMRS REs are employed.
  • FIG 8 shows a schematic diagram of a downlink subframe in an embodiment in which a physical channel is multiplexed based on FDM and 12 DMRS REs are employed.
  • FIG. 9 shows a schematic diagram of a downlink subframe in an embodiment in which a physical channel is multiplexed based on TDM and 12 DMRS REs are employed.
  • FIG. 10 shows a schematic diagram of a downlink subframe of the prior art LTE.
  • FIG. 11 shows a flow diagram of a method performed in a base station in accordance with an embodiment of the disclosure.
  • FIG. 12 illustrates a flow diagram of a method performed in a user device in accordance with an embodiment of the present disclosure.
  • both the base station and the user equipment mentioned refer to the base station and user equipment of the narrowband Internet of Things (NB-IoT).
  • NB-IoT narrowband Internet of Things
  • these NB-IoT user equipments support uplink and downlink 180KHz RF bandwidth.
  • a narrowband IoT physical downlink shared channel is simply referred to as NB-PDSCH
  • a narrowband IoT physical downlink control channel is referred to simply as NB-PDCCH.
  • the physical Internet downlink channel with the Internet of Things may be NB-PDSCH and/or NB-PDCCH.
  • the reference signaling used to demodulate the narrowband IoT physical downlink channel is called DMRS.
  • the resource unit used to transmit the DMRS is called a DMRS RE.
  • FIG. 1 shows a block diagram of a base station 100 in accordance with an embodiment of the present disclosure.
  • the base station 100 includes a transmitting unit 110 and a configuration unit 120.
  • the base station 100 may also include other functional units necessary for implementing its functions, such as various processors, memories, radio frequency receiving units, baseband signal extracting units, physical uplink channel receiving processing units, and other physical downlink channels. Transmit processing unit and so on.
  • a detailed description of these well-known elements has been omitted for the sake of brevity.
  • the configuration unit 120 configures a group number of a resource element group for reference signaling of a narrowband IoT physical downlink channel (eg, NB-PDSCH and/or NB-PDCCH) demodulation.
  • a narrowband IoT physical downlink channel eg, NB-PDSCH and/or NB-PDCCH
  • At least two sets of resource elements for demodulating reference signaling of the NB-PDSCH, such as the first group of resource elements and the second group of resource elements, may be predefined in the system.
  • the first set of reference signaling resource elements is a subset of the second set of reference signaling resource elements.
  • the first group of reference signaling resource units and the second group of reference signaling resource units may be two sets of resource units with an empty intersection.
  • the first set of reference signaling resource elements is a subset of the second set of reference signaling resource elements
  • the first set of reference signaling resource elements may be composed of 12 resource elements of one physical resource block pair
  • the second reference signaling resource unit group is composed of 12 resource units constituting the first group of reference signaling resource units and another 12 resource units in the same physical resource block pair, and includes a total of 24 resource units.
  • the first set of demodulation reference signaling resource units may be used by 12 resource elements in existing LTE for transmitting user equipment specific reference signaling on antenna ports 7 and 8. (ie, 12 resource elements located on OFDM symbols Nos.
  • the resource unit may be from the resource elements of the existing LTE for transmitting user equipment-specific reference signaling on antenna ports 7, 8, 9 and 10 (ie, 0, 1, 5 of a physical resource block pair) And 24 resource elements on the 5th, 6th, 12th, and 13th OFDM symbols on subcarriers 6, 10, and 11).
  • 12 subcarriers in a physical resource block pair are numbered 0, 1...11 from low to high in frequency
  • 14 OFDM symbols are numbered 0, 1, ... 13 in chronological order. This will be described in detail below with reference to Figures 3a and 3b.
  • the first group and the second group of demodulation reference signaling resource units may occupy resource units at other locations.
  • the first group of demodulation reference signaling resource units may be composed of 12 resource elements located on the 3rd, 4th, 10th and 11th OFDM symbols on the 3rd, 8th and 11th subcarriers in one physical resource block pair.
  • the second group of reference signaling resource units may be located on the 3rd, 4th, 10th, and 11th OFDM symbols on the 2nd, 3rd, 7th, 8th, 10th, and 11th subcarriers in one physical resource block pair. Consists of resource units. The present disclosure is not limited in this regard.
  • the first group and the second group of demodulation reference signaling resource units may include a greater or lesser number of resource units, for example, the first group may include 4 resource units, and the second group may Includes 8 resource units.
  • the disclosure is not limited in this respect.
  • the second reference The resource unit of the signaling resource unit group more than the first reference signaling resource unit group may be redefined for transmission of the NB-PDSCH.
  • the second set of reference signaling The resource unit is more than the first group of reference signaling resource units, that is, the 12th, 6th, 12th, and 13th OFDM symbols on the 0th, 5th, and 10th subcarriers in one physical resource block pair. Resource units that can be redefined for NB-PDSCH transmission.
  • the first group of reference signaling resource units and the second group of reference signaling resource units are two sets of resource elements that are empty
  • the first group of reference signaling resource units may be defined for transmitting cell-specific reference signals.
  • the second set of reference signaling resource unit groups can be defined for transmitting user equipment specific reference signaling.
  • the configuration unit 120 may be based on the multiplexing condition of the NB-IoT physical downlink channel (for example, whether the NB-PDCCH and the NB-PDSCH are simultaneously multiplexed in the same subframe; and/or the number of multiplexed physical downlink channels; etc.) And determining a number of resource units or reference signaling resource unit groups for reference signaling for physical downlink channel demodulation. This will be described in detail below with reference to FIGS. 4-9.
  • the transmitting unit 110 is configured to send indication information indicating a configured resource configuration of reference signaling for narrowband IoT physical downlink channel (eg, NB-PDSCH and/or NB-PDCCH) demodulation.
  • the indication information may include indication for demodulation of a narrowband Internet of Things physical downlink channel The number of resource elements of the reference signaling or the group number of the reference signaling resource unit group.
  • the transmitting unit 110 may embed the indication information in physical downlink signaling for transmission.
  • the indication information may be embedded in any of the following signaling: Downlink Control Information (DCI), Medium Access Control (MAC) layer signaling, Radio Resource Control (RRC) signaling, or System Information Block (SIB).
  • DCI Downlink Control Information
  • MAC Medium Access Control
  • RRC Radio Resource Control
  • SIB System Information Block
  • FIG. 2 shows a block diagram of a User Equipment UE 200 in accordance with the present disclosure.
  • the UE 200 includes a receiving unit 210 and an extracting unit 220.
  • the UE 200 also includes other functional units necessary for implementing its functions, such as various processors, memories, radio frequency transmitting units, baseband signal generating units, physical uplink channel transmission processing units, and other physical downlink channel reception. Processing unit and so on.
  • various processors, memories, radio frequency transmitting units, baseband signal generating units, physical uplink channel transmission processing units, and other physical downlink channel reception. Processing unit and so on has been omitted for the sake of brevity.
  • the receiving unit 210 receives the physical downlink signaling of the NB-IoT.
  • the processing unit 220 extracts, from the received physical downlink signaling of the NB-IoT, a resource configuration indicating the configured reference signaling for the narrowband IoT physical downlink channel (eg, NB-PDSCH and/or NB-PDCCH) demodulation.
  • the indication information such as the number of resource units indicating the reference signaling for the narrowband Internet of Things physical downlink channel demodulation or the indication information of the group number of the reference signaling resource unit group.
  • the user equipment may extract the number information of the reference signaling resource unit for the physical downlink channel demodulation or the group number of the reference signaling resource unit group or the like through DCI or MAC layer signaling or RRC signaling or system information block.
  • 3a and 3b show schematic diagrams of two sets of reference signaling resource element groups for physical downlink channel demodulation predefined in the system, in accordance with an embodiment of the present disclosure.
  • 3a is a layout of a first group of reference signaling resource unit groups in a subframe, which is composed of 12 reference signaling resource units;
  • FIG. 3b is a layout of a second group of reference signaling resource unit groups in a subframe, It consists of 24 reference signaling resource units.
  • the 12 reference signaling resource units of the first set of reference signaling resource unit groups correspond to 12 resource elements in the existing LTE for transmitting user equipment specific reference signaling on antenna ports 7 and 8; the second group of reference signals
  • the 24 reference signaling resource units of the resource unit group are made to correspond to the 24 resource elements in the existing LTE for transmitting user equipment specific reference signaling on antenna ports 7, 8, 9 and 10.
  • the configuration unit can be based on the multiplexing of the NB-IoT physical downlink channel.
  • the number of resource elements or reference signaling resource unit groups of reference signaling that are used for physical downlink channel demodulation This is exemplified below with reference to the case where two sets of reference signaling resource unit groups as shown in Figures 3a and 3b are predetermined in the system.
  • 24 reference signaling resource units may be used for NB-IoT NB-PDCCH. And demodulation of NB-PDSCH.
  • 24 reference signaling resource units may be used ( Or a resource unit group consisting of 24 resource units) for demodulation of the NB-PDSCH.
  • 12 reference signaling resource units may be used (or A resource unit group consisting of 12 resource units) is used for demodulation of the NB-PDSCH.
  • multiplexing between NB-PDCCH and NB-PDSCH may be based on Enhanced Resource Element Group (EREG) or frequency division multiplexing. (Frequency Division Multiplexing, FDM) or Time Division Multiplexing (TDM).
  • EREG Enhanced Resource Element Group
  • FDM Frequency Division Multiplexing
  • TDM Time Division Multiplexing
  • multiplexing between multiple NB-PDCCHs may be based on Enhanced Resource Element Group (EREG) or Frequency Division Multiplexing (Frequency Division Multiplexing, FDM) or Time Division Multiplexing (TDM).
  • EREG Enhanced Resource Element Group
  • FDM Frequency Division Multiplexing
  • TDM Time Division Multiplexing
  • FIG. 4 is a schematic diagram of a downlink subframe in which a physical channel is multiplexed based on EREG and 24 DMRS REs are employed, according to an embodiment of the present disclosure.
  • the EREG is used to define a mapping between NB-PDCCH and/or NB-PDSCH to resource elements.
  • a downlink subframe (or a physical resource block pair) of an NB-IoT there are 16 EREGs, numbered 0 to 15, and each EREG is composed of 9 resource units.
  • the frequency domain is followed by the time domain, and the sequence is 0 to 15 ascending.
  • the method is to remove all resource units except the resource unit that carries the 24 demodulation reference signaling, and the resource units with the same number belong to the same EREG group. For example, all resource elements numbered 0 constitute EREG No. 0; all resource units numbered 1 constitute EREG No. 1; and so on.
  • An NB-PDCCH consists of one or more enhanced resource element groups (EREGs).
  • EREGs enhanced resource element groups
  • An NB-PDSCH consists of one or more EREGs.
  • EREG is not limited to the above definition manner, and may be any combination of resource units based on time domain and frequency domain 2-dimensional distribution in the same subframe. Even, the EREG may be any combination of resource units that are 2-dimensionally distributed in the time domain and the frequency domain in multiple subframes. For example, in a downlink subframe of an NB-IoT, all the resource elements except the resource unit carrying the 24 demodulation reference signals may be cyclically numbered in a 0 to 15 ascending order in a time domain of the first time domain. And then group the resource units with the same number into the same EREG group. The present disclosure is not limited in this regard.
  • FIG. 5 illustrates a schematic diagram of a downlink subframe in which a physical channel is multiplexed based on FDM and 24 DMRS REs are employed, according to another embodiment of the present disclosure. That is, in one subframe, the NB-PDCCH and/or the NB-PDSCH are multiplexed in units of one or more subcarriers. When the NB-PDCCH or the NB-PDSCH is composed of multiple subcarriers, the multiple subcarriers may be consecutively distributed subcarriers or non-continuously distributed subcarriers.
  • NB-PDCCH and/or NB-PDSCH are multiplexed in units of one or more orthogonal frequency division multiplexing (OFDM) symbols.
  • OFDM orthogonal frequency division multiplexing
  • the number of reference signaling resource units for NB-PDSCH (and/or NB-PDCCH) demodulation is 12 (or reference letter for NB-PDSCH (and/or NB-PDCCH) demodulation
  • the resource unit group is composed of 12 resource units
  • the 12 resource units that are more than the 24 resource units can redefine the transmission for the NB-PDSCH (and/or NB-PDCCH).
  • FIG. 7 illustrates a schematic diagram of a downlink subframe in which a physical channel is multiplexed based on EREG and 12 DMRS REs are employed, according to another embodiment of the present disclosure.
  • EREGs are used to define the mapping between NB-PDSCH and resource elements.
  • a downlink subframe (or a physical resource block pair) of an NB-IoT there are 16 EREGs, which are numbered from 0 to 15. There are two ways to generate an EREG.
  • Manner 1 As shown in FIG. 7, in a downlink subframe of an NB-IoT, the resource unit and the redefinition of the bearer 12 demodulation reference signaling are removed in a 0 to 15 ascending order according to the pre-frequency domain back time domain. All resource elements except for resource elements for transmitting NB-PDSCH (and/or NB-PDCCH) are cyclically numbered, and resource elements having the same number belong to the same EREG group. For example, all resource elements numbered 0 constitute EREG No. 0; all resource units numbered 1 constitute EREG No. 1; and so on. For the 12 additional resource units, 12 EREGs in 16 EREGs can be re-incorporated. There are a variety of arrangement methods, as shown in Figure 7, which is a layout mode, 12 resource units are programmed into the EREG 0 to 12 as shown in Figure 7.
  • Manner 2 In a downlink subframe of an NB-IoT, cyclically numbering all resource elements except for resource elements carrying 12 demodulation reference signals in a 0 to 15 ascending order according to a pre-frequency domain back time domain
  • the resource units with the same number belong to the same EREG group. For example, all resource elements numbered 0 constitute EREG No. 0; all resource units numbered 1 constitute EREG No. 1; and so on.
  • FIG. 8 shows a schematic diagram of a downlink subframe according to another embodiment of the present disclosure, in which a physical channel is multiplexed based on FDM and a schematic diagram of 12 DMRS REs is employed. It can be seen from the figure that the extra 12 reference signaling resource units are respectively classified into the subcarriers in which they are located. Only one extra 12 reference signaling resource unit redefinition or allocation manner is shown in FIG. 8, but other redefinition or allocation methods are not excluded. The present disclosure is not limited in this regard.
  • FIG. 9 shows a schematic diagram of a downlink subframe according to another embodiment of the present disclosure, in which a physical channel is multiplexed based on TDM and a schematic diagram of 12 DMRS REs is employed. It can be seen from FIG. 9 that the extra 12 reference signaling resource units are respectively classified into the OFDM symbol in which they are located. Only one extra 12 reference signaling resource unit redefinition or allocation manner is shown in FIG. 9, and other redefinition or allocation manners are not excluded. The present disclosure is not limited in this regard.
  • FIG. 11 shows a flow diagram of a method 1100 performed in a base station in accordance with an embodiment of the disclosure.
  • a group number of a reference signaling resource unit group for demodulation of a narrowband IoT physical downlink channel (eg, NB-PDSCH and/or NB-PDCCH) is configured.
  • a narrowband IoT physical downlink channel eg, NB-PDSCH and/or NB-PDCCH
  • at least two sets of resources for demodulating reference signaling of the narrowband IoT physical downlink channel are predefined Source unit group.
  • step S1120 indication information indicating the configured group number of the reference signaling resource unit group for demodulating the narrowband IoT physical downlink channel is transmitted.
  • the indication information may be sent in any of the following downlink signaling: downlink control information (DCI), medium access control (MAC) layer signaling, radio resource control (RRC) signaling, or system information block (SIB).
  • DCI downlink control information
  • MAC medium access control
  • RRC radio resource control
  • SIB system information block
  • FIG. 12 shows a flow diagram of a method 1200 performed in a user device in accordance with an embodiment of the present disclosure.
  • step S1210 physical downlink signaling is received.
  • step S1220 indication information indicating the configured group number of the reference signaling resource unit group for demodulating the narrowband IoT physical downlink channel is extracted from the received physical downlink signaling.
  • At least two sets of resource element groups for demodulating reference signaling of the narrowband IoT physical downlink channel are predefined in the system.
  • the downlink signaling may be any of the following signaling: Downlink Control Information (DCI), Medium Access Control (MAC) layer signaling, Radio Resource Control (RRC) signaling, or System Information Block (SIB).
  • DCI Downlink Control Information
  • MAC Medium Access Control
  • RRC Radio Resource Control
  • SIB System Information Block
  • the methods 1100 and 1200 according to the present disclosure may be performed by a base station and a user equipment according to an embodiment of the present disclosure, respectively, and the operations of the base station and the user equipment according to the embodiments of the present disclosure have been described in detail above, and are not based on The details of the method of the embodiments of the present disclosure are described in detail.
  • the methods and apparatus of the present disclosure have been described above in connection with the preferred embodiments. Those skilled in the art will appreciate that the methods shown above are merely exemplary. The methods of the present disclosure are not limited to the steps and sequences shown above.
  • the network nodes and user equipment shown above may include more modules, for example, may also include modules that may be developed or developed in the future for base stations, or UEs, and the like.
  • the various logos shown above are merely exemplary and not limiting, and the disclosure is not limited to the specific cells as examples of such identifications. Many variations and modifications can be made by those skilled in the art in light of the teachings of the illustrated embodiments.
  • the above-described embodiments of the present disclosure may be implemented by software, hardware, or a combination of both software and hardware.
  • the base station and various components within the user equipment in the above embodiments may be implemented by various devices including, but not limited to, analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, and programmable processing. , application specific integrated circuit (ASIC), field programmable gate array (FPGA), programmable logic device (CPLD), and many more.
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • CPLD programmable logic device
  • base station refers to a mobile communication data and control switching center having a large transmission power and a relatively large coverage area, including resource allocation scheduling, data reception and transmission, and the like.
  • User equipment refers to a user mobile terminal, for example, a terminal device including a mobile phone, a notebook, etc., which can perform wireless communication with a base station or a micro base station.
  • embodiments of the present disclosure disclosed herein can be implemented on a computer program product.
  • the computer program product is a product having a computer readable medium encoded with computer program logic that, when executed on a computing device, provides related operations to implement The above technical solution of the present disclosure.
  • the computer program logic When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present disclosure.
  • Such an arrangement of the present disclosure is typically provided as software, code, and/or other data structures, such as one or more, that are arranged or encoded on a computer readable medium such as an optical medium (eg, CD-ROM), floppy disk, or hard disk.
  • Software or firmware or such a configuration may be installed on the computing device such that one or more processors in the computing device perform the technical solutions described in the embodiments of the present disclosure.
  • each functional module or individual feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by circuitry, typically one or more integrated circuits.
  • Circuitry designed to perform the various functions described in this specification can include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs) or general purpose integrated circuits, field programmable gate arrays (FPGAs), or others.
  • a general purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine.
  • the above general purpose processor or each circuit may be configured by a digital circuit or may be configured by a logic circuit.
  • the present disclosure may also use integrated circuits obtained using the advanced technology.

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Abstract

本公开实施例提供了一种用于NB-IoT物理下行信道解调的参考信令资源单元的配置方法，以及执行所述方法的相应的基站和用户设备。根据本公开实施例的基站，包括：配置单元，用于配置用于窄带物联网物理下行信道解调的参考信令资源单元组的组号，其中，预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资源单元组；以及，发送单元，用于发送指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息。

Description

解调参考信令的资源配置方法、基站和用户设备 技术领域
本公开涉及无线通信技术领域，更具体地，本公开涉及用于物理信道解调的参考信令资源单元的配置方法、基站和用户设备。
背景技术
随着移动通信的快速增长和技术的巨大进步，世界将走向一个完全互联互通的网络社会，即任何人或任何东西在任何时间和任何地方都可以获得信息和共享数据。预计到2020年，互联设备的数量将达到500亿部，其中仅有100亿部左右可能是手机和平板电脑，其它的则不是与人对话的机器，而是彼此对话的机器。因此，如何设计系统以更好地支持万物互联是一项需要深入研究的课题。
在第三代合作伙伴计划(3GPP)的长期演进项目(LTE)的标准中，将机器对机器的通信称为机器类型通信(Machine Type Communication，MTC)。MTC是一种不需要人为参与的数据通信服务。大规模的MTC用户设备部署，可以用于安全、跟踪、付账、测量以及消费电子等领域，具体涉及的应用包括视频监控、供货链跟踪、智能电表，远程监控等。MTC要求较低的功率消耗，支持较低的数据传输速率和较低的移动性。目前的LTE系统主要是针对人与人的通信服务。而实现MTC服务的规模竞争优势及应用前景的关键在于LTE网络支持低成本的MTC设备。
另外，一些MTC设备需要安装在居民楼地下室或者由绝缘箔片、金属护窗或者传统建筑物的厚墙保护的位置，相比较LTE网络中常规设备终端(如手机，平板电脑等)，这些设备的空中接口将明显遭受更严重的穿透损失。3GPP决定研究附加20dB覆盖增强的MTC设备的方案设计与性能评估，值得注意的是，位于糟糕网络覆盖区域的MTC设备具有以下特点：非常低的数据传输速率、非常宽松的延时要求以及有限的移动性。针对以上MTC特点，LTE网络可以进一步优化一些信令和/或信道用以更好地支持MTC业务。
为此，在2014年6月举行的3GPP RAN#64次全会上，提出了一个新的面向Rel-13的低复杂性和覆盖增强的MTC的工作项目(参见非专利文献：RP-140990New Work Item on Even Lower Complexity and Enhanced Coverage LTE UE for MTC，Ericsson，NSN)。在该工作项目的描述中，LTE Rel-13系统需要支持上下行1.4MHz射频带宽的MTC用户设备工作在任意的系统带宽(例如1.4MHz、3MHz、5MHz、10MHz、15MHz、20MHz等等)下。该工作项目标准化将于2015年底结束。
另外，为了更好地实现万物互联，在2015年9月举行的3GPP RAN#69此次全会上，又提出了一个新的工作项目(参见非专利文献：RP-151621New Work Item：NarrowBand IoT(NB-IoT))，我们称之为窄带物联网(Narrowband Internet of Thing，NB-IoT)。在该项目的描述中，NB-IoT的用户设备(User Equipment，UE)将支持上下行180KHz的射频带宽。
LTE的下行链路传输基于正交频分复用(OFDM)。在LTE系统中，一个无线电帧被划分为10个子帧(#0到#9)。每个子帧在时域中可以包括例如长度为0.5ms的2个等大小的时隙，且在频域中可以例如包括12个子载波。每个时隙包括7个正交频分复用(OFDM)符号。可以由时间上的OFDM符号和频率上的子载波一起定义资源单元(RE)，如图10中所示的时间-频率栅格。其中，每个RE对应于一个OFDM符号间隔期间的一个子载波。在LTE中也定义了物理资源块(Physical Reource Block，简称PRB)，其中，每个PRB由一个时隙期间的12个连续的子载波组成。于是，一个子帧包括一对物理资源块，也称为物理资源块对。
在现有的LTE系统中，UE的资源分配的最小粒度为一个物理资源块或物理资源块对，也就是说，在同一子帧中，现有LTE系统的多个物理下行共享信道(Physical Downlink Shared Channel，PDSCH)之间的复用，或PDSCH与增强的物理下行控制信道(Enhanced Physical Downlink Control Channel，EPDCCH)之间的复用是基于PRB(或PRB对)的。而NB-IoT的UE只支持上下行180kHz的射频带宽，即相当于一个PRB(或PRB对)大小的射频带宽。因此，在NB-IoT中不适用基于PRB(或PRB对)的复用机制。因此，需要新的适用于NB-IoT的下行信道设计。 相应地，需要一种新的适用于NB-IoT的解调参考信令(DMRS)资源单元(RE)的配置机制。
发明内容
本公开实施例提供了一种解决NB-IoT物理下行信道解调的参考信令资源单元的配置方法，以及执行所述方法的相应的基站和用户设备。
根据本公开的第一方面，提供了一种基站，包括：配置单元，用于配置用于窄带物联网物理下行信道解调的参考信令资源单元组的组号，其中，预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资源单元组；以及，发送单元，用于发送指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息。
根据本公开的第二方面，提供了一种在基站中执行的方法，包括：配置用于窄带物联网物理下行信道解调的参考信令资源单元组的组号，其中，预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资源单元组；以及，发送指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息。
根据本公开的第三方面，提供了一种用户设备，包括：接收单元，用于接收物理下行信令；以及，提取单元，用于从所接收的物理下行信令中提取指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息，其中，系统中预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资源单元组。
根据本公开的第四方面，提供了一种在用户设备中执行的方法，包括：
接收物理下行信令；以及，从所接收的物理下行信令中提取指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息，其中，系统中预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资源单元组。
在本公开的一些实施例中，指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息被承载在下述信令之一中：下行控制信息，媒体接入控制层信令，无线资源控制信令，或系统信息块。
在本公开的一些实施例中，预定义的用于解调窄带物联网物理下行信道的参考信令资源单元组包括第一参考信令资源单元组和第二参考信令资源单元组，并且第一参考信令资源单元组是第二参考信令资源单元组的子集。
可选地，所述第一参考信令资源单元组由一个物理资源块对中的12个资源单元构成，所述第二个参考信令资源单元组由所述物理资源块对中的24个资源单元构成。
可选地，所述第一参考信令资源单元组由所述物理资源块对中的第1、6和11号子载波上位于第5、6、12和13号正交频分复用“OFDM”符号上的12个资源单元构成，所述第二参考信令资源单元组由所述物理资源块对中的第0、1、5、6、10和11号子载波上位于第5、6、12和13号OFDM符号上的24个资源单元所组成，其中所述物理资源块对对应的12个子载波按频率从低到高编号为0、1……11，所述物理资源块对对应的14个OFDM符号按时间顺序编号为0、1……13。
可选地，当第一参考信令资源单元组被配置用于窄带物联网物理下行信道的解调时，第二参考信令资源单元组比第一参考信令资源单元组多出的资源单元被重定义用于窄带物联网物理下行信道传输。
在另一些实施例中，预定义的用于解调窄带物联网物理下行信道的参考信令资源单元组包括第一参考信令资源单元组和第二参考信令资源单元组，所述第一参考信令资源单元组用于传输小区特定的参考信令，所述第二参考信令资源单元组用于传输用户设备特定的参考信令，并且所述第一参考信令资源单元组和所述第二参考信令资源单元组的交集为空。
附图说明
通过下文结合附图的详细描述，本公开的上述和其它特征将会变得更加明显，其中：
图1示出了根据本公开实施例的基站的框图。
图2示出了根据本公开实施例的用户设备的框图。
图3a和图3b示出了根据本公开实施例的预定义的两组解调参考信令资源单元(DMRS REs)的示意图。
图4示出了在基于EREG复用下行物理信道且采用24个DMRS REs的实施例中的下行子帧示意图。
图5示出了在基于基于FDM复用下行物理信道且采用24个DMRS REs的实施例中的下行子帧示意图。
图6示出了在基于TDM复用物理信道且采用24个DMRS REs的实施例中的下行子帧示意图。
图7示出了在基于EREG复用物理信道且采用12个DMRS REs的实施例中的下行子帧示意图。
图8示出了在基于FDM复用物理信道且采用12个DMRS REs的实施例中的下行子帧示意图。
图9示出了在基于TDM复用物理信道且采用12个DMRS REs的实施例中的下行子帧示意图。
图10示出了现有技术的LTE的下行子帧的示意图。
图11示出了根据本公开实施例的在基站中执行的方法的流程图。
图12示出了根据本公开实施例的在用户设备中执行的方法的流程图。
具体实施方式
下面结合附图和具体实施方式对本公开进行详细阐述。应当注意，本公开不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本公开没有直接关联的公知技术的详细描述，以防止对本公开的理解造成混淆。
下文以LTE移动通信系统及其后续的演进版本作为示例应用环境，具体描述了根据本公开的多个实施方式。然而，需要指出的是，本公开不限于以下实施方式，而是可适用于更多其它的无线通信系统，例如今后的5G蜂窝通信系统。
在本公开的下述实施例中，所提到的基站和用户设备均指代窄带物联网(NB-IoT)的基站和用户设备。如前所述，这些NB-IoT的用户设备支持上下行180KHz的射频带宽。
如本文所使用的，窄带物联网物理下行共享信道被简称为NB-PDSCH，窄带物联网物理下行控制信道被简称为NB-PDCCH。窄 带物联网物理下行信道可以是NB-PDSCH和/或NB-PDCCH。用于解调窄带物联网物理下行信道的参考信令称为DMRS。用于传输DMRS的资源单元称为DMRS RE。
图1示出了根据本公开实施例的基站100的框图。如图所示，基站100包括：发送单元110和配置单元120。本领域技术人员应理解，基站100还可以包括实现其功能所必需的其他功能单元，如各种处理器、存储器、射频接收单元、基带信号提取单元、物理上行信道接收处理单元和其它物理下行信道发射处理单元等等。然而为了简便，省略了这些公知元件的详细描述。
配置单元120配置用于窄带物联网物理下行信道(例如NB-PDSCH和/或NB-PDCCH)解调的参考信令的资源单元组的组号。在系统中可以预定义至少两组用于解调NB-PDSCH的参考信令的资源单元，如第一组资源单元和第二组资源单元。
在一些实例中，第一组参考信令资源单元是第二组参考信令资源单元的子集。而在另一些实例中，第一组参考信令资源单元和第二组参考信令资源单元可以是交集为空的两组资源单元。
在第一组参考信令资源单元是第二组参考信令资源单元的子集的情形下，例如第一组参考信令资源单元可以由一个物理资源块对中的12个资源单元构成，而第二个参考信令资源单元组由构成第一组参考信令资源单元的12个资源单元和同一物理资源块对中的另外12个资源单元构成，共包括24个资源单元。可选地，为了便于与现有LTE标准兼容，第一组解调参考信令资源单元可以由现有LTE中用于天线端口7和8上传输用户设备特定的参考信令的12个资源单元(也即，一个物理资源块对中的第1、6和11号子载波上位于第5、6、12和13号OFDM符号上的12个资源单元)所组成，而第二组参考信令资源单元可以由现有LTE中用于天线端口7、8、9和10上传输用户设备特定的参考信令的24个资源单元(也即，一个物理资源块对中的第0、1、5、6、10和11号子载波上位于第5、6、12和13号OFDM符号上的24个资源单元)所组成。在该实例中，一个物理资源块对中的12个子载波按频率从低到高编号为0、1……11，14个OFDM符号按时间顺序编号为0、1……13。下文中将参考图3a和图3b对此进行详细说明。
应该理解，在本公开实施例中，第一组和第二组解调参考信令资源单元可以占用其他位置的资源单元。例如第一组解调参考信令资源单元可以由一个物理资源块对中的第3、8和11号子载波上位于第3、4、10和11号OFDM符号上的12个资源单元所组成，而第二组参考信令资源单元可以由一个物理资源块对中的第2、3、7、8、10和11号子载波上位于第3、4、10和11号OFDM符号上的24个资源单元所组成。本公开在这方面不作限制。
还应该理解，在本公开中，第一组和第二组解调参考信令资源单元可以包括更多或者更少数目的资源单元，例如第一组可以包括4个资源单元，而第二组可以包括8个资源单元。本公开在这方面也不作限制。
在第一组参考信令资源单元是第二组参考信令资源单元的子集的情形下，当第一组参考信令资源单元被配置用于窄带下行链路的解调时，第二参考信令资源单元组比第一参考信令资源单元组多出的资源单元可被重定义用于NB-PDSCH的传输。参考上面的例子，当使用由现有LTE中用于天线端口7和8上传输用户设备特定的参考信令的12个资源单元的第一组参考信令资源单元时，第二组参考信令资源单元比第一组参考信令资源单元多处的资源单元，即一个物理资源块对中的第0、5和10号子载波上位于第5、6、12和13号OFDM符号上的12个资源单元，可被重定义用于NB-PDSCH的传输。
在第一组参考信令资源单元和第二组参考信令资源单元是交集为空的两组资源单元的情形下，第一组参考信令资源单元可被定义用于传输小区特定的参考信令，第二组参考信令资源单元组可被定义用于传输用户设备特定的参考信令。
配置单元120可以根据NB-IoT物理下行信道的复用情况(例如，在同一子帧中，是否同时复用NB-PDCCH和NB-PDSCH；和/或复用的物理下行信道的个数；等等)确定用于物理下行信道解调的参考信令的资源单元的个数或参考信令资源单元组。下文中将参考图4-图9对此进行详细说明。
发射单元110用于发送指示所配置的用于窄带物联网物理下行信道(例如NB-PDSCH和/或NB-PDCCH)解调的参考信令的资源配置的指示信息。该指示信息可以包括指示用于窄带物联网物理下行信道解调的 参考信令的资源单元的个数或参考信令资源单元组的组号。
发射单元110可以将该指示信息嵌入在物理下行信令中进行发送。例如，可以将该指示信息嵌入下述任一信令中：下行控制信息(DCI)、媒体接入控制(MAC)层信令、无线资源控制(RRC)信令或系统信息块(SIB)。
图2示出了根据本公开的用户设备UE 200的框图。如图所示，UE200包括：接收单元210和提取单元220。本领域技术人员应理解，UE 200还包括实现其功能所必需的其他功能单元，如各种处理器、存储器、射频发射单元、基带信号生成单元、物理上行信道发射处理单元和其它物理下行信道接收处理单元等等。然而为了简便，省略了这些公知元件的详细描述。
接收单元210接收NB-IoT的物理下行信令。
处理单元220从所接收的NB-IoT的物理下行信令中提取指示所配置的用于窄带物联网物理下行信道(例如NB-PDSCH和/或NB-PDCCH)解调的参考信令的资源配置的指示信息，如指示用于窄带物联网物理下行信道解调的参考信令的资源单元的个数或参考信令资源单元组的组号的指示信息。
例如，用户设备可以通过DCI或MAC层信令或RRC信令或系统信息块提取用于物理下行信道解调的参考信令资源单元的个数信息或参考信令资源单元组的组号等。
如图3a和图3b示出了根据本公开的一个具体实施例的在系统中预定义的两组用于物理下行信道解调的参考信令资源单元组的示意图。图3a为第一组参考信令资源单元组在子帧中的布局，其由12个参考信令资源单元组成；图3b为第二组参考信令资源单元组在子帧中的布局，其由24个参考信令资源单元组成。
第一组参考信令资源单元组的12个参考信令资源单元对应于现有LTE中用于天线端口7和8上传输用户设备特定的参考信令的12个资源单元；第二组参考信令资源单元组的24个参考信令资源单元对应于现有LTE中用于天线端口7、8、9和10上传输用户设备特定的参考信令的24个资源单元。
如前所述，配置单元可以根据NB-IoT物理下行信道的复用情况确 定用于物理下行信道解调的参考信令的资源单元的个数或参考信令资源单元组。下面参考系统中预定了如图3a和图3b所示的两组参考信令资源单元组的情形对此进行示例说明。
例如，当在同一子帧中同时复用NB-PDCCH和NB-PDSCH时，可以采用24个参考信令资源单元(或由24个资源单元组成的资源单元组)用于NB-IoT NB-PDCCH和NB-PDSCH的解调。
当在同一子帧中只复用了NB-PDSCH而且复用的NB-PDSCH的个数大于4(或复用的NB-IoT UE数大于4)时，可以采用24个参考信令资源单元(或由24个资源单元组成的资源单元组)用于NB-PDSCH的解调。
当在同一子帧中只复用了NB-PDSCH而且复用的NB-PDSCH的个数(或复用的NB-IoT UE数)小于等于4时，可以采用12个参考信令资源单元(或由12个资源单元组成的资源单元组)用于NB-PDSCH的解调。
如果在同一子帧中同时复用了NB-PDCCH和NB-PDSCH，NB-PDCCH和NB-PDSCH之间的复用可以基于增强的资源单元组(Enhanced Resource Element Group，EREG)或频分复用(Frequency Division Multiplexing，FDM)或时分复用(Time Division Multiplexing，TDM)。
如果在同一子帧中只复用了NB-PDSCH，则多个NB-PDCCH之间的复用可以基于增强的资源单元组(Enhanced Resource Element Group，EREG)或频分复用(Frequency Division Multiplexing，FDM)或时分复用(Time Division Multiplexing，TDM)。
下面参考图4-图9示出根据本公开各个实施例的下行信道设计进行示例说明。
图4出了根据本公开一个实施例的下行子帧示意图，其中基于EREG复用物理信道并且采用24个DMRS REs。
EREG用于定义NB-PDCCH和/或NB-PDSCH到资源单元之间的映射。在一个NB-IoT的下行子帧(或一个物理资源块对)中，有16个EREGs，其编号为0至15，每个EREG由9个资源单元组成。如图4所示，在一个NB-IoT的下行子帧中，按先频域后时域，以0至15升序的 方式为去除承载24个解调参考信令的资源单元以外的所有资源单元进行循环编号，号码相同的资源单元属于同一EREG组。例如，所有编号为0的资源单元组成0号EREG；所有编号为1的资源单元组成1号EREG；等等。
一个NB-PDCCH由一个或多个增强的资源单元组(EREG)组成。
一个NB-PDSCH由一个或多个EREGs组成。
应该理解，EREG的定义不局限于上述的定义方式，也可以是在同一子帧中，任何基于时域和频域2维分布的资源单元的组合。甚至，EREG还可以是在多个子帧中，任何基于时域和频域2维分布的资源单元的组合。例如，在一个NB-IoT的下行子帧中，可以按先时域后频域，以0至15升序的方式为去除承载24个解调参考信令的资源单元以外的所有资源单元进行循环编号，然后将号码相同的资源单元归到同一EREG组。本公开在这方面不作限制。
图5示出了根据本公开另一实施例的下行子帧示意图，其中基于FDM复用物理信道并且采用24个DMRS REs。即在一个子帧中，以一个或多个子载波为单位复用NB-PDCCH和/或NB-PDSCH。当NB-PDCCH或NB-PDSCH由多个子载波组成时，其多个子载波可以是连续分布的子载波，也可以是非连续分布的子载波。
图6示出了根据本公开另一实施例的下行子帧示意图，其中基于TDM复用物理信道并且采用24个DMRS REs。即在一个子帧中，以一个或多个正交频分复用(Othogonal Frequency Division Multiplexing，OFDM)符号为单位复用NB-PDCCH和/或NB-PDSCH。当NB-PDCCH或NB-PDSCH由多个OFDM符号组成时，其多个OFDM符号可以是连续分布的OFDM符号，也可以是非连续分布的OFDM符号。
如前所述，当用于NB-PDSCH(和/或NB-PDCCH)解调的参考信令资源单元数为12(或用于NB-PDSCH(和/或NB-PDCCH)解调的参考信令资源单元组由12个资源单元组成)时，与24个资源单元相比多出的12资源单元可以重新定义用于NB-PDSCH(和/或NB-PDCCH)的传输。下面参考图7-图9进行示例说明。
图7示出了根据本公开另一实施例的下行子帧示意图，其中基于EREG复用物理信道并且采用12个DMRS REs。
EREGs用于定义NB-PDSCH到资源单元之间的映射。在一个NB-IoT的下行子帧(或一个物理资源块对)中，有16个EREGs，其编号为0至15。有以下2种方式生成EREG。
方式1：如图7所示，在一个NB-IoT的下行子帧中，按先频域后时域，以0至15升序的方式为去除承载12解调参考信令的资源单元和重定义用于传输NB-PDSCH(和/或NB-PDCCH)的资源单元以外的所有资源单元进行循环编号，号码相同的资源单元属于同一EREG组。例如，所有编号为0的资源单元组成0号EREG；所有编号为1的资源单元组成1号EREG；等等。而对多出来的12个资源单元可以重新编入16个EREGs中的12EREGs。有多种编排方式，如图7所示即为一种编排方式，将12个资源单元按图7所示编入0至12号EREG。
方式2：在一个NB-IoT的下行子帧中，按先频域后时域，以0至15升序的方式为去除承载12个解调参考信令的资源单元以外的所有资源单元进行循环编号，号码相同的资源单元属于同一EREG组。例如，所有编号为0的资源单元组成0号EREG；所有编号为1的资源单元组成1号EREG；等等。
图8示出了本公开另一实施例的下行子帧示意图，其中基于FDM复用物理信道并且采用12个DMRS REs的示意图。由图可以看出，多出的12个参考信令资源单元分别归入其所在的子载波中。图8中只示出一种多出的12个参考信令资源单元重定义或分配方式，但是并不排除其它的重定义或分配方式。本公开在这方面不作限制。
图9示出了本公开另一实施例的下行子帧示意图，其中基于TDM复用物理信道并且采用12个DMRS REs的示意图。由图可9以看出，多出的12个参考信令资源单元分别归入其所在的OFDM符号中。图9中只示出一种多出的12个参考信令资源单元重定义或分配方式，并不排除其它的重定义或分配方式。本公开在这方面不作限制。
图11示出了根据本公开实施例的在基站中执行的方法1100的流程图。
在步骤S1110中，配置用于窄带物联网物理下行信道(例如NB-PDSCH和/或NB-PDCCH)解调的参考信令资源单元组的组号。其中，预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资 源单元组。
在步骤S1120中，发送指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息。该指示信息可被嵌入下述任一下行信令中发送：下行控制信息(DCI)、媒体接入控制(MAC)层信令、无线资源控制(RRC)信令或系统信息块(SIB)。
图12示出了根据本公开实施例的在用户设备中执行的方法1200的流程图。
在步骤S1210中，接收物理下行信令。
在步骤S1220中，从所接收的物理下行信令中提取指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息。
其中，系统中至少预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资源单元组。
该下行信令可以是下述任一信令：下行控制信息(DCI)、媒体接入控制(MAC)层信令、无线资源控制(RRC)信令或系统信息块(SIB)。
根据本公开的方法1100和1200可以分别由根据本公开实施例的基站和用户设备来执行，在前文已经对根据本公开实施例的基站和用户设备的操作进行了详细描述，在此不在对根据本公开实施例的方法的细节进行赘述。
上文已经结合优选实施例对本公开的方法和涉及的设备进行了描述。本领域技术人员可以理解，上面示出的方法仅是示例性的。本公开的方法并不局限于上面示出的步骤和顺序。上面示出的网络节点和用户设备可以包括更多的模块，例如还可以包括可以开发的或者将来开发的可用于基站、或UE的模块等等。上文中示出的各种标识仅是示例性的而不是限制性的，本公开并不局限于作为这些标识的示例的具体信元。本领域技术人员根据所示实施例的教导可以进行许多变化和修改。
应该理解，本公开的上述实施例可以通过软件、硬件或者软件和硬件两者的结合米实现。例如，上述实施例中的基站和用户设备内部的各种组件可以通过多种器件来实现，这些器件包括但不限于：模拟电路器件、数字电路器件、数字信号处理(DSP)电路、可编程处理器、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、可编程逻辑器件(CPLD)， 等等。
在本申请中，“基站”是指具有较大发射功率和较广覆盖面积的移动通信数据和控制交换中心，包括资源分配调度、数据接收发送等功能。“用户设备”是指用户移动终端，例如包括移动电话、笔记本等可以与基站或者微基站进行无线通信的终端设备。
此外，这里所公开的本公开的实施例可以在计算机程序产品上实现。更具体地，该计算机程序产品是如下的一种产品：具有计算机可读介质，计算机可读介质上编码有计算机程序逻辑，当在计算设备上执行时，该计算机程序逻辑提供相关的操作以实现本公开的上述技术方案。当在计算系统的至少一个处理器上执行时，计算机程序逻辑使得处理器执行本公开实施例所述的操作(方法)。本公开的这种设置典型地提供为设置或编码在例如光介质(例如CD-ROM)、软盘或硬盘等的计算机可读介质上的软件、代码和/或其他数据结构、或者诸如一个或多个ROM或RAM或PROM芯片上的固件或微代码的其他介质、或一个或多个模块中的可下载的软件图像、共享数据库等。软件或固件或这种配置可安装在计算设备上，以使得计算设备中的一个或多个处理器执行本公开实施例所描述的技术方案。
此外，上述每个实施例中所使用的基站设备和终端设备的每个功能模块或各个特征可以由电路实现或执行，所述电路通常为一个或多个集成电路。设计用于执行本说明书中所描述的各个功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)或通用集成电路、现场可编程门阵列(FPGA)或其他可编程逻辑器件、分立的门或晶体管逻辑、或分立的硬件组件、或以上器件的任意组合。通用处理器可以是微处理器，或者所述处理器可以是现有的处理器、控制器、微控制器或状态机。上述通用处理器或每个电路可以由数字电路配置，或者可以由逻辑电路配置。此外，当由于半导体技术的进步，出现了能够替代目前的集成电路的先进技术时，本公开也可以使用利用该先进技术得到的集成电路。
尽管以上已经结合本公开的优选实施例示出了本公开，但是本领域的技术人员将会理解，在不脱离本公开的精神和范围的情况下，可以对本公开进行各种修改、替换和改变。因此，本公开不应由上述实施例来 限定，而应由所附权利要求及其等价物来限定。

Claims (28)

  1. 一种基站，包括：
    配置单元，用于配置用于窄带物联网物理下行信道解调的参考信令资源单元组的组号，其中，预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资源单元组；以及
    发送单元，用于发送指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息。
  2. 根据权利要求1所述的基站，其中，
    所述发送单元将所述指示信息包含在下述物理下行信令之一中发送：下行控制信息，媒体接入控制层信令，无线资源控制信令，或系统信息块。
  3. 根据权利要求1所述的基站，其中，
    预定义的用于解调窄带物联网物理下行信道的参考信令资源单元组包括第一参考信令资源单元组和第二参考信令资源单元组，并且第一参考信令资源单元组是第二参考信令资源单元组的子集。
  4. 根据权利要求3所述的基站，其中，
    所述第一参考信令资源单元组由一个物理资源块对中的12个资源单元构成，所述第二个参考信令资源单元组由所述物理资源块对中的24个资源单元构成。
  5. 根据权利要求4所述的基站，其中，
    所述第一参考信令资源单元组由所述物理资源块对中的第1、6和11号子载波上位于第5、6、12和13号正交频分复用“OFDM”符号上的12个资源单元构成，所述第二参考信令资源单元组由所述物理资源块对中的第0、1、5、6、10和11号子载波上位于第5、6、12和13号OFDM符号上的24个资源单元所组成，其中所述物理资源块对对应的12个子载波按频率从低到高编号为0、1……11，所述物理资源块对对应的14个OFDM符号按时间顺序编号为0、1……13。
  6. 根据权利要求3～5中任一项所述的基站，其中，
    当第一参考信令资源单元组被配置用于窄带物联网物理下行信道的解调时，第二参考信令资源单元组比第一参考信令资源单元组多出的资 源单元被重定义用于窄带物联网物理下行信道传输。
  7. 根据权利要求1所述的基站，其中，
    预定义的用于解调窄带物联网物理下行信道的参考信令资源单元组包括第一参考信令资源单元组和第二参考信令资源单元组，所述第一参考信令资源单元组用于传输小区特定的参考信令，所述第二参考信令资源单元组用于传输用户设备特定的参考信令，并且所述第一参考信令资源单元组和所述第二参考信令资源单元组的交集为空。
  8. 一种在基站中执行的方法，包括：
    配置用于窄带物联网物理下行信道解调的参考信令资源单元组的组号，其中，预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资源单元组；以及
    发送指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息。
  9. 根据权利要求8所述的方法，其中，
    所述发送单元将所述指示信息包含在下述物理下行信令之一中发送：下行控制信息，媒体接入控制层信令，无线资源控制信令，或系统信息块。
  10. 根据权利要求8所述的方法，其中，
    预定义的用于解调窄带物联网物理下行信道的参考信令资源单元组包括第一参考信令资源单元组和第二参考信令资源单元组，并且第一参考信令资源单元组是第二参考信令资源单元组的子集。
  11. 根据权利要求10所述的方法，其中，
    所述第一参考信令资源单元组由一个物理资源块对中的12个资源单元构成，所述第二个参考信令资源单元组由所述物理资源块对中的24个资源单元构成。
  12. 根据权利要求11所述的方法，其中，
    所述第一参考信令资源单元组由所述物理资源块对中的第1、6和11号子载波上位于第5、6、12和13号正交频分复用“OFDM”符号上的12个资源单元构成，所述第二参考信令资源单元组由所述物理资源块对中的第0、1、5、6、10和11号子载波上位于第5、6、12和13号OFDM符号上的24个资源单元所组成，其中所述物理资源块对对应的12个子 载波按频率从低到高编号为0、1……11，所述物理资源块对对应的14个OFDM符号按时间顺序编号为0、1……13。
  13. 根据权利要求10～12中任一项所述的方法，其中，
    当第一参考信令资源单元组被配置用于窄带物联网物理下行信道的解调时，第二参考信令资源单元组比第一参考信令资源单元组多出的资源单元被重定义用于窄带物联网物理下行信道传输。
  14. 根据权利要求8所述的方法，其中，
    预定义的用于解调窄带物联网物理下行信道的参考信令资源单元组包括第一参考信令资源单元组和第二参考信令资源单元组，所述第一参考信令资源单元组用于传输小区特定的参考信令，所述第二参考信令资源单元组用于传输用户设备特定的参考信令，并且所述第一参考信令资源单元组和所述第二参考信令资源单元组的交集为空。
  15. 一种用户设备，包括：
    接收单元，用于接收物理下行信令；以及
    提取单元，用于从所接收的物理下行信令中提取指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息，
    其中，预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资源单元组。
  16. 根据权利要求15所述的用户设备，其中，
    所述物理下行信令是下述之一：下行控制信息，媒体接入控制层信令，无线资源控制信令，或系统信息块。
  17. 根据权利要求15所述的用户设备，其中，
    预定义的用于解调窄带物联网物理下行信道的参考信令资源单元组包括第一参考信令资源单元组和第二参考信令资源单元组，并且第一参考信令资源单元组是第二参考信令资源单元组的子集。
  18. 根据权利要求17所述的用户设备，其中，
    所述第一参考信令资源单元组由一个物理资源块对中的12个资源单元构成，所述第二个参考信令资源单元组由所述物理资源块对中的24个资源单元构成。
  19. 根据权利要求18所述的用户设备，其中，
    所述第一参考信令资源单元组由所述物理资源块对中的第1、6和11号子载波上位于第5、6、12和13号正交频分复用“OFDM”符号上的12个资源单元构成，所述第二参考信令资源单元组由所述物理资源块对中的第0、1、5、6、10和11号子载波上位于第5、6、12和13号OFDM符号上的24个资源单元所组成，其中所述物理资源块对对应的12个子载波按频率从低到高编号为0、1……11，所述物理资源块对对应的14个OFDM符号按时间顺序编号为0、1……13。
  20. 根据权利要求17～19中任一项所述的用户设备，其中，
    当第一参考信令资源单元组被配置用于窄带物联网物理下行信道的解调时，第二参考信令资源单元组比第一参考信令资源单元组多出的资源单元被重定义用于窄带物联网物理下行信道传输。
  21. 根据权利要求15所述的用户设备，其中，
    预定义的用于解调窄带物联网物理下行信道的参考信令资源单元组包括第一参考信令资源单元组和第二参考信令资源单元组，所述第一参考信令资源单元组用于传输小区特定的参考信令，所述第二参考信令资源单元组用于传输用户设备特定的参考信令，并且所述第一参考信令资源单元组和所述第二参考信令资源单元组的交集为空。
  22. 一种在用户设备中执行的方法，包括：
    用于接收物理下行信令；以及
    从所接收的物理下行信令中提取指示所配置的用于解调窄带物联网物理下行信道的参考信令资源单元组的组号的指示信息，
    其中，预定义至少两组用于解调窄带物联网物理下行信道的参考信令的资源单元组。
  23. 根据权利要求22所述的方法，其中，
    所述物理下行信令是下述之一：下行控制信息，媒体接入控制层信令，无线资源控制信令，或系统信息块。
  24. 根据权利要求22所述的方法，其中，
    预定义的用于解调窄带物联网物理下行信道的参考信令资源单元组包括第一参考信令资源单元组和第二参考信令资源单元组，并且第一参考信令资源单元组是第二参考信令资源单元组的子集。
  25. 根据权利要求24所述的方法，其中，
    所述第一参考信令资源单元组由一个物理资源块对中的12个资源单元构成，所述第二个参考信令资源单元组由所述物理资源块对中的24个资源单元构成。
  26. 根据权利要求25所述的方法，其中，
    所述第一参考信令资源单元组由所述物理资源块对中的第1、6和11号子载波上位于第5、6、12和13号正交频分复用“OFDM”符号上的12个资源单元构成，所述第二参考信令资源单元组由所述物理资源块对中的第0、1、5、6、10和11号子载波上位于第5、6、12和13号OFDM符号上的24个资源单元所组成，其中所述物理资源块对对应的12个子载波按频率从低到高编号为0、1……11，所述物理资源块对对应的14个OFDM符号按时间顺序编号为0、1……13。
  27. 根据权利要求24～26中任一项所述的方法，其中，
    当第一参考信令资源单元组被配置用于窄带物联网物理下行信道的解调时，第二参考信令资源单元组比第一参考信令资源单元组多出的资源单元被重定义用于窄带物联网物理下行信道传输。
  28. 根据权利要求22所述的方法，其中，
    预定义的用于解调窄带物联网物理下行信道的参考信令资源单元组包括第一参考信令资源单元组和第二参考信令资源单元组，所述第一参考信令资源单元组用于传输小区特定的参考信令，所述第二参考信令资源单元组用于传输用户设备特定的参考信令，并且所述第一参考信令资源单元组和所述第二参考信令资源单元组的交集为空。
PCT/CN2016/112063 2015-12-28 2016-12-26 解调参考信令的资源配置方法、基站和用户设备 Ceased WO2017114349A1 (zh)

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