WO2016070430A1 - Dm-rs的资源配置方法、装置以及通信*** - Google Patents

Dm-rs的资源配置方法、装置以及通信*** Download PDF

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Publication number
WO2016070430A1
WO2016070430A1 PCT/CN2014/090648 CN2014090648W WO2016070430A1 WO 2016070430 A1 WO2016070430 A1 WO 2016070430A1 CN 2014090648 W CN2014090648 W CN 2014090648W WO 2016070430 A1 WO2016070430 A1 WO 2016070430A1
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Prior art keywords
resource particles
resource
particles
user equipment
subcarrier
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PCT/CN2014/090648
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English (en)
French (fr)
Inventor
张翼
周华
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富士通株式会社
张翼
周华
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Application filed by 富士通株式会社, 张翼, 周华 filed Critical 富士通株式会社
Priority to EP14905396.9A priority Critical patent/EP3217585A4/en
Priority to KR1020177012423A priority patent/KR20170067837A/ko
Priority to JP2017523835A priority patent/JP2017539143A/ja
Priority to CN201480082508.9A priority patent/CN106797279A/zh
Priority to PCT/CN2014/090648 priority patent/WO2016070430A1/zh
Publication of WO2016070430A1 publication Critical patent/WO2016070430A1/zh
Priority to US15/586,671 priority patent/US20170237590A1/en

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    • 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
    • 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
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • H04L27/2602—Signal structure
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a resource configuration method for a Demodulation Reference Signal (DM-RS) in a 3D MIMO (3D Multiple Input Multiple Output) system. , devices and communication systems.
  • DM-RS Demodulation Reference Signal
  • 3D MIMO 3D Multiple Input Multiple Output
  • a two-dimensional active antenna array can be placed at the transmitting end, which forms a three-dimensional beam by flexible weighting of antenna coefficients.
  • the three-dimensional multi-antenna technology can improve the antenna gain, reduce the beam width, and reduce the interference; on the other hand, by multiplexing more users in space, the multiplexing efficiency of the system can be improved. Therefore, the three-dimensional multi-antenna technology can significantly improve the transmission efficiency and reliability of the system, and is a popular candidate technology for future mobile communication systems.
  • FIG. 1 is a schematic diagram of multi-user MIMO (MU-MIMO) in 3D MIMO. As shown in FIG. 1, the vertical dimension is added to the 3D multi-antenna system, and the dimension of the system capable of supporting MU-MIMO can be further increased.
  • MU-MIMO multi-user MIMO
  • the system supports MU-MIMO dimension is limited, each user supports a maximum rank (rank) of 2 transmission, MU-MIMO maximum And the rank rank is 4.
  • rank the rank of 2 transmission
  • MU-MIMO maximum the rank rank is 4.
  • DM-RS related information needs to be enhanced to ensure reliable demodulation of data.
  • the inventors have found that the density of DM-RSs can be different for central user equipment and edge user equipment.
  • the density of the DM-RS of each user equipment is not distinguished, and the resource utilization cannot be further improved.
  • Embodiments of the present invention provide a method, an apparatus, and a communication system for indicating DM-RS information. Not only can the user equipment support high-dimensional MU-MIMO, but also the DM-RS density of the central user equipment can be reduced to improve resource utilization.
  • a resource allocation method for a DM-RS is provided, which is applied to a 3D MIMO system, where the method includes:
  • the base station configures, for a plurality of user equipments that perform MU-MIMO, resources for transmitting the DM-RS;
  • the resource particles that transmit the DM-RS in one subframe are divided into multiple groups, so that the density of the resource particles for the at least one user equipment or the streaming DM-RS is reduced.
  • a resource configuration apparatus for a DM-RS is provided, which is applied to a 3D MIMO system, where the apparatus includes:
  • a resource configuration unit configured to configure, for a plurality of user equipments that perform MU-MIMO, resources for transmitting DM-RSs; and grouping resource particles for transmitting DM-RSs in one subframe into multiple groups, so that at least one user equipment or streaming DM- The density of resource particles of RS is reduced.
  • a communication system comprising:
  • the base station configures, for the MU-MIMO multiple user equipments, the resources for transmitting the DM-RS; wherein, the resource particles for transmitting the DM-RS in one subframe are divided into multiple groups, so that the at least one user equipment or the streaming DM- The density of resource particles of RS is reduced.
  • a computer readable program wherein when the program is executed in a base station, the program causes a computer to perform resource configuration of the DM-RS as described above in the base station method.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a resource configuration method of a DM-RS as described above in a base station.
  • An embodiment of the present invention provides that a base station configures, for a plurality of user equipments that perform MU-MIMO, resources for transmitting DM-RSs, where the resource particles for transmitting DM-RSs in one subframe are divided into multiple groups, so that at least The density of resource particles of a user equipment or streaming DM-RS is reduced.
  • a base station configures, for a plurality of user equipments that perform MU-MIMO, resources for transmitting DM-RSs, where the resource particles for transmitting DM-RSs in one subframe are divided into multiple groups, so that at least The density of resource particles of a user equipment or streaming DM-RS is reduced.
  • 1 is a schematic diagram of multi-user MIMO in 3D MIMO
  • FIG. 2 is a schematic diagram of DM-RS resources in the current standard
  • 3 is a mapping diagram of codewords to layers in an LTE-A system
  • FIG. 4 is a schematic flowchart of a resource configuration method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a DM-RS packet according to an embodiment of the present invention.
  • FIG. 6 is another schematic diagram of a DM-RS packet according to an embodiment of the present invention.
  • FIG. 7 is another schematic diagram of a DM-RS packet according to an embodiment of the present invention.
  • FIG. 8 is another schematic diagram of a DM-RS packet according to an embodiment of the present invention.
  • FIG. 9 is another schematic diagram of a DM-RS packet according to an embodiment of the present invention.
  • FIG. 10 is another schematic diagram of a DM-RS packet according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of port and RE mapping according to an embodiment of the present invention.
  • FIG. 12 is another schematic diagram of port and RE mapping according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of an information indication method according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a resource configuration apparatus according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • Figure 16 is a block diagram showing the configuration of a communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of DM-RS resources in the current standard. As shown in FIG. 2, ports 7, 8, 11, 13 and ports 9, 10, 12, and 14 are multiplexed by code division, respectively. Multiplexing is performed by means of frequency division. In the case of multi-user transmission, each user only uses port 7,8 at most, and only uses the dotted box in Figure 2. Resource particles.
  • FIG. 3 is a diagram showing a mapping relationship of codewords to layers in an LTE-A system. As shown in Figure 3, the system has a maximum of 2 code words (CW, Code Word) and 8 layers (Layer), and each code word corresponds to at most four layers.
  • CW code word
  • Layer layers
  • Table 1 shows the indications of the antenna port, the scrambling identity, and the number of layers in the existing standard.
  • the base station can send the port, the scrambling identifier, and the layer number to the user equipment through a 3-bit dynamic signaling, so that the user equipment performs DM-RS related channel estimation and demodulation.
  • the information shown in Table 1 does not meet the requirements of the system, and the information related to the DM-RS needs to be enhanced to ensure reliable demodulation of the data.
  • the embodiments of the present invention are described in detail below.
  • FIG. 4 is a schematic flowchart of a resource configuration method according to an embodiment of the present invention. As shown in FIG. 4, the method includes:
  • Step 401 The base station configures, for a plurality of user equipments that perform MU-MIMO, resources for transmitting the DM-RS, where the resource particles that transmit the DM-RS in one subframe are divided into multiple groups, so that the at least one user equipment or the stream is transmitted. The density of resource particles of the DM-RS is reduced.
  • the density of DM-RSs required by the edge user equipment and the central user equipment may be different.
  • a typical MU-MIMO scenario is performed for user equipment (central user equipment) with good channel quality.
  • the density of the DM-RS can be reduced.
  • the embodiment of the present invention compares the RE density specified in LTE Rel. 10-12, that is, the RE of the DM-RS is transmitted in the embodiment of the present invention. The density is lowered relative to the RE density specified in LTE Rel. 10-12.
  • the user equipment is a central user equipment.
  • the resource particles of the transport DM-RS may be, for example, 12 resource particles in a time-frequency resource of one subframe, and the 12 resource particles are divided into 2 or 3 groups.
  • the 12 REs may be 12 REs with OFDM symbols 5, 6, 12, and 13 and subcarrier numbers 1, 6, and 11; or OFDM symbols 5, 6, 12, and 13 The 12 REs whose subcarrier numbers are 0, 5, and 10.
  • the above-mentioned 12RE in the subframe (that is, 12 REs in the dotted line frame described in FIG. 2, corresponding ports 7, 8 in the current standard) are taken as an example for description.
  • 12RE 12 REs located in a specific position (ie, a broken line frame) as shown in FIG. 2 in the subframe
  • the subframe is located at a specific position as shown in FIG. 2 (ie, a dotted frame and The 24 REs of the solid line frame are simply referred to as 24RE.
  • each group can adopt 6RE/4RE, and the previous 12RE (corresponding to ports 7, 8) can be divided into 2/3 groups to serve two/three user equipments, which is equivalent to using frequency division multiplexing (FDM, Frequency Division Multiplexing).
  • FDM Frequency Division Multiplexing
  • TDM time division multiplexing
  • the principle of grouping the DM-RSs may be that the channel estimation performance of each group of DM-RSs is as similar as possible; the channel estimation capability of each group of DM-RSs is as good as possible.
  • the density of resource particles for transmitting the DM-RS for at least one user equipment is reduced, or is at least one stream (for example, the same user equipment has several The density of resource particles that transmit DM-RS is reduced.
  • FIG. 5 is a schematic diagram of a DM-RS packet according to an embodiment of the present invention. For 24 resource particles, it is divided into two groups (respectively used separately) Express).
  • the RE of group 1 can be used for DM-RS transmission of UE1
  • the RE of group 2 can be used for DM-RS transmission of UE2.
  • FIG. 6 is another schematic diagram of a DM-RS packet according to an embodiment of the present invention, which is divided into two groups for 24 REs (respectively used separately Express).
  • the RE of group 1 can be used for DM-RS transmission of UE1
  • the RE of group 2 can be used for DM-RS transmission of UE2.
  • FIG. 7 is another schematic diagram of a DM-RS packet according to an embodiment of the present invention, which is divided into two groups for 24 REs (respectively used separately Express).
  • the RE of group 1 can be used for DM-RS transmission of UE1
  • the RE of group 2 can be used for DM-RS transmission of UE2.
  • FIG. 8 is another schematic diagram of a DM-RS packet according to an embodiment of the present invention, which is divided into two groups for 24 REs (respectively used separately Express).
  • the RE of group 1 can be used for DM-RS transmission of UE1
  • the RE of group 2 can be used for DM-RS transmission of UE2.
  • FIG. 9 is another schematic diagram of a DM-RS packet according to an embodiment of the present invention, which is divided into three groups for 24 REs (respectively used separately Express).
  • the RE of group 1 can be used for DM-RS transmission of UE1
  • the RE of group 2 can be used for DM-RS transmission of UE2
  • the RE of group 3 can be used for DM-RS transmission of UE3.
  • FIG. 10 is another schematic diagram of a DM-RS packet according to an embodiment of the present invention, which is divided into three groups for 24 REs (respectively used separately Express).
  • the RE of group 1 can be used for DM-RS transmission of UE1
  • the RE of group 2 can be used for DM-RS transmission of UE2
  • the RE of group 3 can be used for DM-RS transmission of UE3.
  • the DM-RS packet is only schematically illustrated in FIG. 5 to FIG. 10, but the present invention Not limited to this, it is also possible to determine the specific grouping method according to the actual situation. For example, only the normal subframe is described above, and the REs used by the DM-RS in the extended subframe may also be grouped.
  • the base station configures resources for transmitting DM-RSs for multiple user equipments that perform MU-MIMO; wherein the resource particles for transmitting the DM-RS are divided into multiple groups.
  • the user equipment can support high-dimensional MU-MIMO, but also the DM-RS density of the central user equipment can be reduced to improve resource utilization.
  • Embodiment 1 On the basis of Embodiment 1, the embodiment of the present invention describes a port-to-physical resource mapping of a DM-RS. The same content as that of Embodiment 1 will not be described again.
  • a group of resource particles in multiple groups may be mapped to ports 7 and 8 of a certain user equipment or stream, and another group of resource particles may be mapped to ports 7, 8 of another user equipment or stream; And/or, mapping a set of resource particles to ports 9, 10 of a certain user equipment or stream, and mapping another set of resource particles to ports 9, 10 of another user equipment or stream.
  • the port of the DM-RS when performing a rank 1-4 transmission, may be mapped onto the resource particle such that the density of resource particles used by the DM-RS is reduced; the rank is 5-8.
  • mapping the ports of the DM-RS to the resource particles makes the density of the resource particles used by the DM-RS unchanged.
  • FIG. 11 is a schematic diagram of port and RE mapping according to an embodiment of the present invention. As shown in FIG. 11, when the low-density DM-RS is used for the rank1-4 transmission of the user equipment, the DM-RS sequence of the ports 7, 8 is mapped to the RE in the dotted frame, and the DM-RS sequence mapping of the ports 9, 10. Go to the RE in the solid box.
  • the ports 7, 8 are distinguished by means of an orthogonal overlay code (OCC), and the ports 9, 10 are distinguished by an OCC.
  • OCC orthogonal overlay code
  • the existing transmission method is still used (that is, the DM-RS ports 7, 8, 11, 13 are mapped to 12 REs, and the DM-RS ports 9, 10, 12, 14 are mapped to 24). RE)).
  • the two groups of DM-RSs can be used by different user equipments, thereby increasing the number of users supported by the DM-RS or improving the transmission efficiency; that is, the location where the DM-RS is not mapped can transmit the Physical Downlink Shared CHannel (PDSCH). , thereby improving the transmission efficiency of the system.
  • PDSCH Physical Downlink Shared CHannel
  • the density of the RE transmitting the DM-RS is halved, and at the rank 5-8, the density of the RE transmitting the DM-RS is unchanged, and the previous mapping method is maintained.
  • FIG. 11 only takes the grouping shown in FIG. 5 as an example, and schematically illustrates how ports and resources are mapped.
  • the present invention is not limited thereto.
  • a specific mapping manner may be determined according to actual conditions.
  • one set of resource particles in multiple groups can be mapped to port 7, another set of resource particles mapped to port 8, another set of resource particles mapped to port 9, and another set of resource particles mapped Go to port 10.
  • FIG. 12 is another schematic diagram of port and RE mapping according to an embodiment of the present invention.
  • the base station transmits a low-density DM-RS to a certain user equipment
  • the DM-RS sequence of the port 7 is mapped to the RE in the dotted box of the first group of DM-RS resources
  • the RS sequence is mapped to the RE in the dashed box of the second group of DM-RS resources
  • the DM-RS sequence of port 9 is mapped to the RE in the solid box of the third group of DM-RS resources
  • the DM-RS sequence of port 10 is Maps to the REs in the solid box of the fourth set of DM-RS resources.
  • mapping the ports of the DM-RS to the resource particles reduces the density of resource particles used by the DM-RS; During transmission, mapping the ports of the DM-RS to the resource particles makes the density of the resource particles used by the DM-RS unchanged.
  • mapping of the DM-RS ports 7, 8, 9, 10 corresponding to the rank 1-4 transmission adopts a new method as shown in FIG.
  • Ports 7 and 8 are distinguished by TDM, ports 9 and 10 are differentiated by TDM, and ports 7, 8, and 9, 10 are distinguished by FDM.
  • the existing transmission method is still used (that is, the DM-RS ports 7, 8, 11, 13 are mapped to 12 REs, and the DM-RS ports 9, 10, 12, 14 maps to 24 REs).
  • the RE density of the transmission DMRS corresponding to rank1 is halved, the RE density of the transmission DM-RS of rank2 remains unchanged, and the change from CDM to TDM enhances the orthogonality of the user equipment.
  • the mapping method in the existing standard can be used. When performing MU-MIMO on multiple low Rank user equipments, the resource density of the transmission DM-RS is reduced, thereby accommodating more DM-RSs or improving the transmission efficiency of the system.
  • the port and RE mapping employs the scheme shown in FIG.
  • the port and RE mapping adopt the prior art, as shown in FIG. 2.
  • the DM-RS density is halved in the Rank1 transmission, and the mapping method in other cases is the same as the existing standard, that is, the rank 2-8 and the existing DM-RS density and mapping methods are the same.
  • the mapping method of rank1 is reduced, thereby accommodating more DM-RSs or improving the transmission efficiency of the system. Since only the mapping method of rank1 is changed, the impact of the standard is small.
  • the port and RE mapping employs the scheme shown in FIG.
  • the rank3-8 transmission uses the mapping method in the standard.
  • the introduction of TDM multiplexing port 7 and port 8 reduces the spatial orthogonality requirement of MU-MIMO user pairing, and enhances the flexibility of system MU-MIMO pairing.
  • REs corresponding to port 7 and port 8 are grouped, and therefore, for at least one stream corresponding to port 7 or port 8, the RE density of the transmission DM-RS is lowered.
  • the base station configures resources for transmitting DM-RSs for multiple user equipments that perform MU-MIMO; wherein resource particles for transmitting DM-RSs in one frame are divided into multiple groups.
  • the DM-RS that reduces the transmission resource density performs port-to-resource mapping. Therefore, not only the user equipment can support high-dimensional MU-MIMO, but also the DM-RS density of the central user equipment can be reduced to improve resource utilization, and the number of users supported by the DM-RS can be increased or the transmission efficiency can be improved.
  • the embodiment of the present invention describes the indication of the base station to the user equipment.
  • the same content as Embodiment 1 and/or Embodiment 2 will not be described again.
  • the base station in order to support the demodulation of the DM-RS, the base station needs to indicate the port, the number of layers, and the scrambling identifier of the DM-RS by the user equipment. For this part, reference may be made to the existing standard, and in this embodiment, Let me repeat. In addition, the base station also needs to indicate to the user equipment the following information: DM-RS resource information used by the user equipment and DM-RS resource information used by MU-MIMO in total; this part is described in detail below.
  • FIG. 13 is a schematic diagram of an information indication method according to an embodiment of the present invention. As shown in FIG. 13, the method includes:
  • Step 1301 The base station sends signaling to the user equipment to indicate information of resource particles used by the DM-RS, where the information indicates the location and/or number of the resource particles in the subframe.
  • the information indicated by the signaling includes: a resource particle density used by the DM-RS of the user equipment, and a total number of resource particles used by the DM-RS when performing MU-MIMO; or: the user equipment Resource particle density used by the DM-RS, corresponding to the resource used by the DM-RS of the user equipment Group information, and the number of resource particles used in total for DM-RS when performing MU-MIMO.
  • the signaling may be high-level signaling, that is, semi-static signaling, or may be dynamic signaling.
  • resource mapping in Embodiment 2 if dynamic signaling is used, it is required to indicate whether the user equipment uses 6RE or 12RE (if 12RE is used, the previous port-to-resource mapping method can be used); the user equipment uses Group 1 is also a resource of group 2; and indicates whether the total DM-RS resource of MU-MIMO uses 12RE or 24RE.
  • eight states can be indicated by three pieces of bit information.
  • the user equipment uses the 12RE, there are only two states of 12 and 24RE.
  • the user equipment uses the 6RE, it needs to indicate: group 1 resources.
  • the DM-RS occupies a total of 6RE, 12RE, and 24RE. Status; group 2 resources.
  • the DM-RS occupies three states of 6RE, 12RE, and 24RE. A total of 8 states, using 3 bits of information.
  • semi-static signaling and dynamic information can be used for indication. If semi-static signaling is used to indicate the resource density of the transmitted DM-RS, the dynamic signaling indicates that only one bit of information is required for the case of a density of 12 RE; for the case of a density of 6 RE, one bit of information is required to indicate that the user equipment is used.
  • Group 1 is also a resource of group 2, and uses 2-bit information to indicate the total number of resources occupied by the DM-RS when performing MU-MIMO, for example, two 6REs indicating whether a group in two groups is occupied and frequency division (single-user Port7- 8 Is the RE corresponding to Port 9-10 occupied?
  • the resource mapping in Embodiment 2 if dynamic signaling is used, it is required to indicate whether the user equipment uses 6RE or 12RE (1 bit), and the total number of resources occupied by the DM-RS when performing MU-MIMO is 6RE. 12RE, 18RE, 24RE, a total of 3 bits of information (or the total number of resources occupied by the DM-RS when performing MU-MIMO is 12RE or 24RE, for a total of 2 bits).
  • semi-static signaling and dynamic information can be used for indication. If the base station semi-statically configures the DM-RS density of the user equipment according to the location of the user equipment, the dynamic information indicates that the total number of resources occupied by the DM-RS when performing MU-MIMO is 6RE, 12RE, 18RE, 24RE, for a total of 2 bits. Information; or indication: the total number of resources occupied by the DM-RS when performing MU-MIMO is 12RE or 24RE, for a total of 1 bit.
  • the possible resources for transmitting the DM-RS can be indicated most flexibly, including 6RE (rank1 SU), 12RE (the MU of two Rank1 user equipments or one user equipment 12RE) Rank1 or rank2 SU), 18RE (for example, one user device uses portRE with a density of 12RE, another user device uses port9 with 6RE), 24RE (4 users with 6RE) The device uses port7, 8, 9, 10).
  • 6RE rank1 SU
  • 12RE the MU of two Rank1 user equipments or one user equipment 12RE
  • 18RE for example, one user device uses portRE with a density of 12RE, another user device uses port9 with 6RE
  • 24RE (4 users with 6RE)
  • the device uses port7, 8, 9, 10).
  • there may be some restrictions on the use of DM-RS that is, when using 6RE density, it is necessary to use paired transmission of two user equipments; otherwise, it is configured to be 12RE density.
  • the base station can indicate the density of the DM-RS resource of the user equipment by using the foregoing method.
  • the benefit of the dynamic signaling indicating the DM-RS resource density is: the scheduling flexibility is increased, and when there is no paired user, the user can effectively utilize the DM-RS resource.
  • the semi-static signaling is used to indicate the DM-RS resource density, and the base station can be determined by the location of the user equipment, which saves dynamic signaling overhead.
  • the above signaling may be used to indicate the number of resources used by the DM-RS, and may also be a method for indicating rate matching on the DM-RS (for example, rate matching for 12RE or 24 REs). Further, the above signaling is described on the basis that the density of resource particles for transmitting the DM-RS is changed. However, the present invention is not limited thereto. In the case that the density of the resource particles transmitting the DM-RS is not changed, the base station may also indicate the density of the resource particles used by the DM-RS by the signaling, so that the user equipment performs, for example, the rate. Match related processing.
  • the base station configures resources for transmitting DM-RSs for multiple user equipments that perform MU-MIMO.
  • the resource particles for transmitting DM-RSs are divided into multiple groups, and the resource particles of different groups correspond to different ones.
  • the base station indicates to the user equipment the density of the resource particles used by the DM-RS by signaling.
  • the embodiment of the invention provides a resource configuration device for a DM-RS, which is applied to a 3D MIMO system.
  • the resource configuration device of the DM-RS may be configured with a resource configuration method of the DM-RS corresponding to the embodiments 1 to 3 in the embodiment of the present invention, and the same content is not described herein again.
  • FIG. 14 is a schematic structural diagram of a resource configuration apparatus of a DM-RS according to an embodiment of the present invention.
  • the resource configuration apparatus 1400 of the DM-RS includes:
  • the resource configuration unit 1401 is configured to configure, for a plurality of user equipments that perform MU-MIMO, resources for transmitting the DM-RS, where the resource particles that transmit the DM-RS in one subframe are divided into multiple groups, so that the at least one user equipment or stream The density of resource particles that transmit DM-RS is reduced.
  • a set of resource particles in the plurality of groups can be mapped to a certain user equipment or stream Ports 7, 8, mapping another set of resource particles to port 7, 8 of another user device or stream; and/or mapping a set of resource particles to a user device or port 9 of 10, will be another A set of resource particles is mapped to port 9, 10 of another user device or stream.
  • the DM-RS ports 7, 8 are mapped to two resource particles having an OFDM symbol of 5, 6 and a subcarrier number of 1, two resource particles having an OFDM symbol of 12, 13 and a subcarrier number of 6, and OFDM.
  • the two resource particles whose symbols are 5, 6 and whose subcarrier number is 11; or DM-RS ports 7, 8 are mapped to two resource particles whose OFDM symbols are 5, 6 and the subcarrier number is 6, OFDM symbols
  • the DM-RS port 9, 10 is mapped to two resource particles having an OFDM symbol of 5, 6 and a subcarrier number of 0, two resource particles having an OFDM symbol of 12, 13 and a subcarrier number of 5, and an OFDM symbol of 5, 6 and two resource particles with a subcarrier number of 10; or, DM-RS ports 9, 10 are mapped to two resource particles with an OFDM symbol of 5, 6 and a subcarrier number of 5, and the OFDM symbol is 12. And 13 resource particles having a subcarrier number of 0, and two resource particles having an OFDM symbol of 12 and 13 and a subcarrier number of 10.
  • mapping the port of the DM-RS to the resource particle reduces the density of the resource particle used by the DM-RS; performing rank 5-8 During transmission, mapping the ports of the DM-RS to the resource particles makes the density of the resource particles used by the DM-RS unchanged.
  • the distinction between ports 7, 8 or between ports 9, 10 is made by orthogonal superposition code division.
  • one set of resource particles in the plurality of groups can be mapped to port 7, another set of resource particles mapped to port 8, another set of resource particles mapped to port 9, and another set The resource particles are mapped to port 10.
  • the DM-RS port 7 is mapped to two resource particles having an OFDM symbol of 5, 6 and a subcarrier number of 1, two resource particles having an OFDM symbol of 12, 13 and a subcarrier number of 6, and an OFDM symbol of 5, 6 and two resource particles with a subcarrier number of 11;
  • the DM-RS port 8 is mapped to two resource particles having an OFDM symbol of 5, 6 and a subcarrier number of 6, two resource particles having an OFDM symbol of 12, 13 and a subcarrier number of 1, and an OFDM symbol of 12. 13 and two resource particles with a subcarrier number of 11;
  • the DM-RS port 9 is mapped to two resource particles having an OFDM symbol of 5, 6 and a subcarrier number of 0. Two resource particles having an OFDM symbol of 12, 13 and a subcarrier number of 5, and two resource particles having an OFDM symbol of 5, 6 and a subcarrier number of 10;
  • the DM-RS port 10 is mapped to two resource particles having an OFDM symbol of 5, 6 and a subcarrier number of 5, two resource particles having an OFDM symbol of 12, 13 and a subcarrier number of 0, and an OFDM symbol of 12. 13 and two resource particles with a subcarrier number of 10.
  • mapping the port of the DM-RS to the resource particle reduces the density of the resource particle used by the DM-RS; performing rank 5-8 During transmission, mapping the ports of the DM-RS to the resource particles makes the density of the resource particles used by the DM-RS unchanged.
  • mapping the ports of the DM-RS to the resource particles makes the density of the resource particles used by the DM-RS unchanged. For example, when performing a rank 1-4 transmission, between ports 7, 8 or between ports 9, 10 are distinguished by time division multiplexing; between ports 7, 8 and ports 9, 10 are performed by frequency division multiplexing. distinguish.
  • mapping the ports of the DM-RS to the resource particles reduces the density of resource particles used by the DM-RS; when performing the rank 2-8 transmission, the DM- Mapping the ports of the RS to the resource particles makes the density of the resource particles used by the DM-RS unchanged.
  • mapping the port of the DM-RS to the resource particle reduces the density of resource particles used by the DM-RS; when performing the transmission of rank 3-8, Mapping the ports of the DM-RS to the resource particles makes the density of the resource particles used by the DM-RS unchanged.
  • the resource configuration apparatus 1400 of the DM-RS may further include:
  • the signaling sending unit 1402 sends signaling to the user equipment to indicate information of resource particles used by the DM-RS, wherein the information indicates a location and/or a number of the resource particles in the subframe.
  • the information indicated by the signaling includes: a resource particle density used by the DM-RS of the user equipment, group information corresponding to the user equipment, and a total number of resource particles used by the MU-MIMO DM-RS; or The resource particle density used by the DM-RS of the user equipment, and the total number of resource particles used by the MU-MIMO DM-RS.
  • the signaling may also be used to indicate information for rate matching of the DM-RS.
  • the embodiment further provides a base station, which is configured with the resource configuration apparatus 1400 of the DM-RS as described above.
  • FIG. 15 is a schematic diagram of a structure of a base station according to an embodiment of the present invention.
  • base station 1500 can include a central processing unit (CPU) 200 and memory 210; and memory 210 is coupled to central processing unit 200.
  • the memory 210 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 200 to receive various information sent by the user equipment and sent to the user equipment. Request information.
  • the central processing unit 200 can be configured to implement the functions of the resource configuration apparatus 1400 of the DM-RS.
  • the base station 1500 can implement the resource configuration method of the DM-RS as described in Embodiments 1 to 3.
  • the base station 1500 may further include: a transceiver 220, an antenna 230, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It is to be noted that the base station 1500 does not have to include all of the components shown in FIG. 15; in addition, the base station 1500 may also include components not shown in FIG. 15, and reference may be made to the prior art.
  • the base station configures resources for transmitting DM-RSs for multiple user equipments that perform MU-MIMO.
  • the resource particles for transmitting DM-RSs are divided into multiple groups, and the resource particles of different groups correspond to different ones.
  • User equipment thereby, not only the user equipment can support high-dimensional MU-MIMO, but also the DM-RS density of the central user equipment can be reduced to improve resource utilization.
  • FIG. 16 is a schematic diagram of a configuration of a communication system according to an embodiment of the present invention.
  • the communication system 1600 includes a base station 1601 and a user equipment 1602.
  • the resource allocation device 1400 of the DM-RS according to the fourth embodiment is disposed in the base station 1601.
  • the embodiment of the present invention further provides a computer readable program, wherein the program causes a computer to perform a resource configuration method of the DM-RSs described in Embodiments 1 to 3 in the base station when the program is executed in a base station .
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the resource configuration method of the DM-RS described in Embodiments 1 to 3 in a base station.
  • the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described in the figures and/or one or more combinations of the functional blocks may also be implemented as a combination of computing devices. For example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

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Abstract

一种DM-RS的资源配置方法、装置以及通信***，应用于3D MIMO***，所述方法包括：基站为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；其中，将一个子帧中传输DM-RS的资源粒子分为多组，使得为至少一个用户设备或流传输DM-RS的资源粒子的密度被降低。由此，不仅可以使得用户设备支持高维MU-MIMO，而且可以减少中心用户设备的DM-RS密度以提高资源利用率。

Description

DM-RS的资源配置方法、装置以及通信*** 技术领域
本发明涉及一种通信技术领域，特别涉及一种三维多输入多输出(3D MIMO，3D Multiple Input Multiple Output)***中的解调参考信号(DM-RS，De-Modulation Reference Signal)的资源配置方法、装置以及通信***。
背景技术
随着天线技术的发展，二维活动天线阵列可以放置在发射端，它通过天线系数的灵活加权来形成三维波束。三维多天线技术一方面能够提高天线增益，减少波束宽度，减少干扰；另一方面通过空间复用更多的用户，可以提高***的复用效率。因此三维多天线技术能显著提高***的传输效率和可靠性，是未来移动通信***的热门候选技术。
相对二维多天线技术，三维多天线技术具有更好的空间分离性，能够支持更多用户复用传输。图1是3D MIMO中多用户MIMO(MU-MIMO)的一示意图，如图1所示，3D多天线***增加了垂直维，***能够支持MU-MIMO的维数可以进一步增大。
应该注意，上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
目前，在现有LTE***中，考虑到***性能增益和参考信号开销的折中，***支持MU-MIMO的维度受到限制，每用户支持最大秩(rank)为2的传输，MU-MIMO的最大和秩(sum rank)为4。为了支持高维MU-MIMO的传输，DM-RS相关的信息需要增强来保证数据的可靠解调。
此外，发明人发现对于中心用户设备和边缘用户设备，DM-RS的密度可以不同。而目前的标准中对于各个用户设备的DM-RS的密度并没有进行区分，不能进一步提高资源的利用率。
本发明实施例提供一种DM-RS信息的指示方法、装置以及通信***。不仅可以使得用户设备支持高维MU-MIMO，而且可以减少中心用户设备的DM-RS密度以提高资源利用率。
根据本发明实施例的第一个方面，提供一种DM-RS的资源配置方法，应用于3D MIMO***中，所述方法包括：
基站为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；
其中，将一个子帧中传输DM-RS的资源粒子分为多组，使得为至少一个用户设备或流传输DM-RS的资源粒子的密度被降低。
根据本发明实施例的第二个方面，提供一种DM-RS的资源配置装置，应用于3D MIMO***中，所述装置包括：
资源配置单元，为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；将一个子帧中传输DM-RS的资源粒子分为多组，使得为至少一个用户设备或流传输DM-RS的资源粒子的密度被降低。
根据本发明实施例的第三个方面，提供一种通信***，所述通信***包括：
基站，为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；其中，将一个子帧中传输DM-RS的资源粒子分为多组，使得为至少一个用户设备或流传输DM-RS的资源粒子的密度被降低。
根据本发明实施例的又一个方面，提供一种计算机可读程序，其中当在基站中执行所述程序时，所述程序使得计算机在所述基站中执行如上所述的DM-RS的资源配置方法。
根据本发明实施例的又一个方面，提供一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在基站中执行如上所述的DM-RS的资源配置方法。
本发明实施例的有益效果在于，基站为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；其中，将一个子帧中传输DM-RS的资源粒子分为多组，使得为至少一个用户设备或流传输DM-RS的资源粒子的密度被降低。由此，不仅可以使得用户设备支持高维MU-MIMO，而且可以减少中心用户设备的DM-RS密度以提高资源利用率。
参照后文的说明和附图，详细公开了本发明的特定实施方式，指明了本发明的原 理可以被采用的方式。应该理解，本发明的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
参照以下的附图可以更好地理解本发明的很多方面。附图中的部件不是成比例绘制的，而只是为了示出本发明的原理。为了便于示出和描述本发明的一些部分，附图中对应部分可能被放大或缩小。
在本发明的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
图1是3D MIMO中多用户MIMO的一示意图；
图2是目前标准中的DM-RS资源的一示意图；
图3是LTE-A***中码字到层的映射关系图；
图4是本发明实施例的资源配置方法的一流程示意图；
图5是本发明实施例的DM-RS分组的一示意图；
图6是本发明实施例的DM-RS分组的另一示意图；
图7是本发明实施例的DM-RS分组的另一示意图；
图8是本发明实施例的DM-RS分组的另一示意图；
图9是本发明实施例的DM-RS分组的另一示意图；
图10是本发明实施例的DM-RS分组的另一示意图；
图11是本发明实施例的端口与RE映射的一示意图；
图12是本发明实施例的端口与RE映射的另一示意图；
图13是本发明实施例的信息指示方法的一示意图；
图14是本发明实施例的资源配置装置的一构成示意图；
图15是本发明实施例的基站的一构成示意图；
图16是本发明实施例的通信***的一构成示意图。
具体实施方式
参照附图，通过下面的说明书，本发明的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本发明的特定实施方式，其表明了其中可以采用本发明的原则的部分实施方式，应了解的是，本发明不限于所描述的实施方式，相反，本发明包括落入所附权利要求的范围内的全部修改、变型以及等同物。
图2是目前标准中的DM-RS资源的一示意图，如图2所示，端口7，8，11，13和端口9，10，12，14分别通过码分的方式进行复用，它们之间通过频分的方式进行复用。在进行多用户传输时，每个用户最多仅使用端口7，8，也就仅使用图2中虚线框中的
Figure PCTCN2014090648-appb-000001
的资源粒子。
图3是LTE-A***中码字到层的映射关系图。如图3所示，***最多有2个码字(CW，Code Word)、8个层(Layer)，每个码字最多对应四个层。
在控制信道DCI 2C/2D中，有关端口、加扰序列、层数目的指示如下表1所示。表1示出了现有标准中天线端口(antenna port)、加扰标识(scrambling identity)以及层数的指示信息。
表1
Figure PCTCN2014090648-appb-000002
如表1所示，基站可以通过一个3比特的动态信令将端口、加扰标识以及层数发送给用户设备，使得用户设备进行DM-RS相关的信道估计以及解调。
但是，为了支持高维MU-MIMO的传输，例如表1所示的信息并不能满足***的需求，DM-RS相关的信息需要增强来保证数据的可靠解调。以下对本发明实施例进行详细说明。
实施例1
本发明实施例提供一种DM-RS的资源配置方法，应用于3D MIMO***中。图4是本发明实施例的资源配置方法的一流程示意图，如图4所示，所述方法包括：
步骤401，基站为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；其中，将一个子帧中传输DM-RS的资源粒子分为多组，使得为至少一个用户设备或流传输DM-RS的资源粒子的密度被降低。
在本实施例中，边缘用户用户设备和中心用户设备所需的DM-RS的密度可以是不同的。典型的MU-MIMO场景是针对信道质量好的用户设备(中心用户设备)进行的。对于中心用户设备，可以减少DM-RS的密度。关于传输DM-RS的资源粒子(RE，Resource Element)的密度，本发明实施例以LTE Rel.10-12中规定的RE密度为基准进行比较，即本发明实施例中传输DM-RS的RE密度相对于LTE Rel.10-12中规定的RE密度被降低。
在本实施例中，所述用户设备为中心用户设备。其中，所述传输DM-RS的资源粒子例如可以为一个子帧的时频资源中的12个资源粒子，所述12个资源粒子被分为2或3组。如图2所示，该12个RE可以是OFDM符号为5、6、12、13，子载波序号为1、6、11的12个RE；也可以是OFDM符号为5、6、12、13，子载波序号为0、5、10的12个RE。
在如下的实施例中，均以上述的在子帧中的12RE(即图2中所述的虚线框中的12个RE，目前标准中对应端口7，8)为例进行说明。以下为了方便说明，仅将子帧中位于如图2所示的特定位置(即虚线框)的12个RE简称为12RE，将子帧中位于如图2所示的特定位置(即虚线框和实线框)的24个RE简称为24RE。
例如，每组可以采用6RE/4RE，以前的12RE(对应端口7，8)可分成2/3组，服务两/三个用户设备，这等效于采用频分复用(FDM，Frequency Division Multiplexing) 加上时分复用(TDM，Time Division Multiplexing)的方式对用户设备的DM-RS进行区分。
在本实施例中，对DM-RS进行分组的原则可以是每组DM-RS的信道估计性能尽可能相似；每组DM-RS的信道估计能力尽可能好。在一个子帧中传输DM-RS的资源粒子被分为多组后，为至少一个用户设备传输DM-RS的资源粒子的密度被降低，或者为至少一个流(例如同一个用户设备具有几个流)传输DM-RS的资源粒子的密度被降低。
以下通过几个实例对如何分组进行详细说明。
图5是本发明实施例的DM-RS分组的一示意图，对于24个资源粒子，被分成2组(分别用
Figure PCTCN2014090648-appb-000003
表示)。其中，组1的RE可以用于UE1的DM-RS传输，组2的RE可以用于UE2的DM-RS传输。
图6是本发明实施例的DM-RS分组的另一示意图，对于24个RE被分成2组(分别用
Figure PCTCN2014090648-appb-000004
表示)。其中，组1的RE可以用于UE1的DM-RS传输，组2的RE可以用于UE2的DM-RS传输。
图7是本发明实施例的DM-RS分组的另一示意图，对于24个RE被分成2组(分别用
Figure PCTCN2014090648-appb-000005
表示)。其中，组1的RE可以用于UE1的DM-RS传输，组2的RE可以用于UE2的DM-RS传输。
图8是本发明实施例的DM-RS分组的另一示意图，对于24个RE被分成2组(分别用
Figure PCTCN2014090648-appb-000006
表示)。其中，组1的RE可以用于UE1的DM-RS传输，组2的RE可以用于UE2的DM-RS传输。
图9是本发明实施例的DM-RS分组的另一示意图，对于24个RE被分成3组(分别用
Figure PCTCN2014090648-appb-000007
表示)。其中，组1的RE可以用于UE1的DM-RS传输，组2的RE可以用于UE2的DM-RS传输，组3的RE可以用于UE3的DM-RS传输。
图10是本发明实施例的DM-RS分组的另一示意图，对于24个RE被分成3组(分别用
Figure PCTCN2014090648-appb-000008
表示)。其中，组1的RE可以用于UE1的DM-RS传输，组2的RE可以用于UE2的DM-RS传输，组3的RE可以用于UE3的DM-RS传输。
值得注意的是，图5至图10中对于DM-RS分组仅进行了示意性说明，但本发明 不限于此，还可以根据实际情况确定具体的分组方式。例如以上仅对常规子帧(Normal subframe)进行了说明，还可以对扩展子帧(extended subframe)中DM-RS使用的RE进行分组。
由上述实施例可知，基站为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；其中，将传输DM-RS的资源粒子分为多组。由此，不仅可以使得用户设备支持高维MU-MIMO，而且可以减少中心用户设备的DM-RS密度以提高资源利用率。
实施例2
在实施例1的基础上，本发明实施例对于DM-RS的端口到物理资源的映射进行说明。其中，与实施例1相同的内容不再赘述。
在本实施例中，可以将多组中的一组资源粒子映射到某一用户设备或流的端口7，8，将另一组资源粒子映射到另一用户设备或流的端口7，8；和/或，将一组资源粒子映射到某一用户设备或流的端口9，10，将另一组资源粒子映射到另一用户设备或流的端口9，10。
在一个实施方式中，在进行秩为1-4的传输时，可以将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度被减少；在进行秩为5-8的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度不变。
图11是本发明实施例的端口与RE映射的一示意图。如图11所示，当使用低密度DM-RS对于用户设备进行rank1-4传输时，端口7，8的DM-RS序列映射到虚线框中的RE，端口9，10的DM-RS序列映射到实线框中的RE。
其中，端口7，8通过正交叠加码分(OCC，Orthogonal Cover Code)的方式进行区分，端口9，10通过OCC的方式进行区分。对于rank5-8传输时，仍采用现有的传输方法(也就是DM-RS端口7，8，11，13映射到12个RE上，DM-RS端口9，10，12，14映射到24个RE上)。两组DM-RS可以为不同用户设备使用，由此可以提高DM-RS支持的用户数目或者提高传输效率；即没有映射DM-RS的位置可以传输物理下行共享信道(PDSCH，Physical Downlink Shared CHannel)，从而提高***的传输效率。
在本实施方式中，相当于rank1-4传输时，传输DM-RS的RE的密度减半，rank5-8时，传输DM-RS的RE的密度不变，维持以前的映射方法。通过增加了一个DM-RS 分组，可以容纳更多的用户设备。
值得注意的是，附图11仅以图5所示的分组为例，对端口与资源如何映射进行了示意性说明。但本发明不限于此，例如在采用其他分组方式(例如图6至10所示的分组)时，可以根据实际情况确定具体的映射方式。
在本实施例中，可以将多组中的一组资源粒子映射到端口7，将另一组资源粒子映射到端口8，将另一组资源粒子映射到端口9，将另一组资源粒子映射到端口10。
图12是本发明实施例的端口与RE映射的另一示意图。如图12所示，当基站使用低密度DM-RS对于某一用户设备进行传输时，端口7的DM-RS序列映射到第一组DM-RS资源的虚线框中的RE，端口8的DM-RS序列映射到第二组DM-RS资源的虚线框中的RE，端口9的DM-RS序列映射到第三组DM-RS资源的实线框中的RE，端口10的DM-RS序列映射到第四组DM-RS资源的实线框中的RE。
在一个实施方式中，在进行秩为1-4的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度被减少；在进行秩为5-8的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度不变。
也就是说，在本实施方式中，对应rank1-4传输，DM-RS端口7，8，9，10的映射都采用如图12所示的新方法。
其中，端口7，8通过TDM方式进行区分，端口9，10通过TDM方式进行区分，端口7，8和9，10之间通过FDM的方式进行区分。对于rank5-8，对于rank5-8传输时，仍采用现有的传输方法(也就是DM-RS端口7，8，11，13映射到12个RE上，DM-RS端口9，10，12，14映射到24个RE上)。
在本实施方式中，对应rank1的传输DMRS的RE密度减半，rank2的传输DM-RS的RE密度保持不变；并且从CDM变成了TDM，增强用户设备的正交性。对于rank5-8，可以沿用现有标准中的映射方法。对于多个低Rank用户设备进行MU-MIMO时，减少传输DM-RS的资源密度，从而容纳更多的DM-RS或者提高了***的传输效率。
在图12所示的方案中，考虑到MU-MIMO每个用户设备仅最大支持4个流，所以DM-RS资源映射时仅对port 7，8，9，10的映射进行优化，而port 11-14和现有标准保持一致，所以图12仅给出port 7-10的映射方法。
在另一个实施方式中，对于rank1传输时，端口与RE映射采用如图12所示的方案。而对于rank2-8传输时，端口与RE映射采用现有技术，如图2所示。
在本实施方式中，Rank1传输时DM-RS密度减半，其它情况的映射方法和现有标准相同，也就是rank2-8和现有DM-RS密度和映射方法都相同。这样对于多个Rank1用户设备进行MU-MIMO时，减少传输DM-RS的资源密度，从而容纳更多的DM-RS或者提高了***的传输效率。由于仅rank1的映射方法进行改动，标准的影响较小。
在另一个实施方式中，对于rank1-2传输，端口与RE映射采用如图12所示的方案。rank3-8传输时采用标准中的映射方法。本实施方式引入TDM复用port 7和port 8，降低了MU-MIMO用户配对时对空间正交性的要求，增强了***MU-MIMO配对的灵活性。
在本实施方式中，例如port 7和port 8对应的RE被分组，因此对于port7或port8对应的至少一个流，传输DM-RS的RE密度被降低。
由上述实施例可知，基站为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；其中，将一帧中传输DM-RS的资源粒子分为多组。此外，将减少了传输资源密度的DM-RS进行端口到资源的映射。由此，不仅可以使得用户设备支持高维MU-MIMO，而且可以减少中心用户设备的DM-RS密度以提高资源利用率，还可以提高DM-RS支持的用户数目或者提高传输效率。
实施例3
在实施例1和/或实施例2的基础上，本发明实施例对于基站向用户设备的指示进行说明。其中，与实施例1和/或实施例2相同的内容不再赘述。
在本实施例中，为了支持DM-RS的解调，基站需要指示用户设备使用DM-RS的端口、层数以及加扰标识，关于这部分内容可以参考现有标准，在本实施例中不再赘述。此外，基站还需要指示用户设备如下信息：该用户设备所使用的DM-RS资源信息和MU-MIMO总共使用的DM-RS资源信息；以下对这部分内容进行详细说明。
图13是本发明实施例的信息指示方法的一示意图，如图13所示，该方法包括：
步骤1301，基站向用户设备发送信令来指示DM-RS所使用的资源粒子的信息，所述信息指示所述资源粒子在子帧中的位置和/或数目。
其中，所述信令指示的信息包括：所述用户设备的DM-RS所使用的资源粒子密度，以及进行MU-MIMO时DM-RS总共使用的资源粒子数目；或者包括：所述用户设备的DM-RS所使用的资源粒子密度，所述用户设备的DM-RS所使用的资源对应 的组信息，以及进行MU-MIMO时DM-RS总共使用的资源粒子数目。
在本实施例中，所述信令可以为高层信令即半静态信令，或者也可以为动态信令。
对于实施例2中资源映射的一个实施方式，如果使用动态信令，则需要指示：该用户设备使用6RE还是12RE(如果使用12RE，可沿用以前的端口到资源的映射方法)；该用户设备使用组1还是组2的资源；以及指示MU-MIMO总共的DM-RS资源使用12RE还是24RE。在本实施方式中，可以通过3个比特信息指示8个状态。
例如，对于该用户设备使用12RE时，仅12和24RE两个状态；对于该用户设备使用6RE时，需要指示：组1资源，进行MU-MIMO时DM-RS总共占用6RE、12RE、24RE三个状态；组2资源，进行MU-MIMO时DM-RS总共占用6RE、12RE、24RE三个状态。总共8个状态，使用3比特信息。
在另一个实施方式中，可以使用半静态信令和动态信息来进行指示。如果使用半静态信令指示传输DM-RS的资源密度，则动态信令指示：对于密度为12RE的情况，仅需1比特信息；对于密度为6RE的情况，需要1比特信息指示该用户设备使用组1还是组2的资源，使用2比特信息指示进行MU-MIMO时DM-RS总共占用的资源数目，例如表示两组中的某组是否被占用以及频分的两个6RE(单用户Port7-8和Port9-10对应的RE)是否被占用。
对于实施例2中资源映射的另一个实施方式，如果使用动态信令，则需要指示：该用户设备使用6RE还是12RE(1比特)，进行MU-MIMO时DM-RS总共占据的资源数目是6RE、12RE、18RE、24RE，总计3比特信息(或者，进行MU-MIMO时DM-RS总共占据的资源数目是12RE或24RE，共计2比特)。
在另一个实施方式中，可以使用半静态信令和动态信息来进行指示。如果基站根据用户设备的位置来半静态地配置用户设备的DM-RS密度，则动态信息指示：进行MU-MIMO时DM-RS总共占用的资源数目为6RE、12RE、18RE、24RE，总计2比特信息；或者指示：进行MU-MIMO时DM-RS总共占用的资源数目为12RE或24RE，共计1比特。
对于使用2比特来指示传输DM-RS的资源信息的方案，可以最灵活地指示传输DM-RS可能的资源，包括6RE(rank1 SU)，12RE(两个Rank1用户设备的MU或者一个用户设备12RE的rank1或rank2的SU)，18RE(例如一个用户设备使用密度为12RE的port7，另一个用户设备使用6RE的port9)，24RE(使用6RE的4个用户 设备使用port7，8，9，10)。对于使用1比特进行指示的方案，可能对使用DM-RS进行了某些限制，也就是说当使用6RE密度时，一定要使用两个用户设备的配对传输；否则就要配置成12RE的密度。
基站可以通过上述方法指示用户设备DM-RS资源的密度，动态信令指示DM-RS资源密度的好处是：增加了调度的灵活性，当没有配对用户时，用户可以有效地利用DM-RS资源；采用半静态信令指示DM-RS资源密度，基站可以通过用户设备的位置来确定，节省动态信令开销。
值得注意的是，上述信令的涵义可以是指示DM-RS使用的资源数，此外也可以是指示对DM-RS进行速率匹配的方法(例如，对12RE还是24个RE进行速率匹配)。并且，以上在传输DM-RS的资源粒子的密度被改变的基础上，对该信令进行了说明。但本发明不限于此，在传输DM-RS的资源粒子的密度没有被改变的情况下，基站也可以通过该信令指示DM-RS所使用的资源粒子的密度，使得用户设备进行例如与速率匹配相关的处理。
由上述实施例可知，基站为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；其中，将传输DM-RS的资源粒子分为多组，不同组的所述资源粒子对应不同的用户设备。此外，基站通过信令向用户设备指示DM-RS所使用的资源粒子的密度。由此，不仅可以使得用户设备支持高维MU-MIMO，而且可以减少中心用户设备的DM-RS密度以提高资源利用率。
实施例4
本发明实施例提供一种DM-RS的资源配置装置，应用于3D MIMO***中。该DM-RS的资源配置装置可以配置与基站中，本发明实施例对应于实施例1至3的DM-RS的资源配置方法，相同的内容不再赘述。
图14是本发明实施例的DM-RS的资源配置装置的一构成示意图，如图14所示，该DM-RS的资源配置装置1400包括：
资源配置单元1401，为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；其中，将一个子帧中传输DM-RS的资源粒子分为多组，使得为至少一个用户设备或流传输DM-RS的资源粒子的密度被降低。
在一个实施方式中，可以将所述多组中的一组资源粒子映射到某一用户设备或流 的端口7，8，将另一组资源粒子映射到另一用户设备或流的端口7，8；和/或将一组资源粒子映射到某一用户设备或流的端口9，10，将另一组资源粒子映射到另一用户设备或流的端口9，10。
例如，DM-RS端口7，8被映射到OFDM符号为5、6且子载波序号为1的两个资源粒子，OFDM符号为12、13且子载波序号为6的两个资源粒子，以及OFDM符号为5、6且子载波序号为11的两个资源粒子上；或者，DM-RS端口7，8被映射到OFDM符号为5、6且子载波序号为6的两个资源粒子，OFDM符号为12、13且子载波序号为1的两个资源粒子，以及OFDM符号为12、13且子载波序号为11的两个资源粒子上；
DM-RS端口9，10被映射到OFDM符号为5、6且子载波序号为0的两个资源粒子，OFDM符号为12、13且子载波序号为5的两个资源粒子，以及OFDM符号为5、6且子载波序号为10的两个资源粒子上；或者，DM-RS端口9，10被映射到OFDM符号为5、6且子载波序号为5的两个资源粒子，OFDM符号为12、13且子载波序号为0的两个资源粒子，以及OFDM符号为12、13且子载波序号为10的两个资源粒子上。
在本实施方式中，在进行秩为1-4的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度被减少；在进行秩为5-8的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度不变。例如，在进行秩为1-4的传输时，端口7，8之间或者端口9，10之间通过正交叠加码分进行区分。
在另一个实施方式中，可以将所述多组中的一组资源粒子映射到端口7，将另一组资源粒子映射到端口8，将另一组资源粒子映射到端口9，将另一组资源粒子映射到端口10。
例如，DM-RS端口7被映射到OFDM符号为5、6且子载波序号为1的两个资源粒子，OFDM符号为12、13且子载波序号为6的两个资源粒子，以及OFDM符号为5、6且子载波序号为11的两个资源粒子上；
DM-RS端口8被映射到OFDM符号为5、6且子载波序号为6的两个资源粒子，OFDM符号为12、13且子载波序号为1的两个资源粒子，以及OFDM符号为12、13且子载波序号为11的两个资源粒子上；
DM-RS端口9被映射到OFDM符号为5、6且子载波序号为0的两个资源粒子， OFDM符号为12、13且子载波序号为5的两个资源粒子，以及OFDM符号为5、6且子载波序号为10的两个资源粒子上；
DM-RS端口10被映射到OFDM符号为5、6且子载波序号为5的两个资源粒子，OFDM符号为12、13且子载波序号为0的两个资源粒子，以及OFDM符号为12、13且子载波序号为10的两个资源粒子上。
在本实施方式中，在进行秩为1-4的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度被减少；在进行秩为5-8的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度不变。例如，在进行秩为1-4的传输时，端口7，8之间或者端口9，10之间通过时分复用进行区分；端口7，8和端口9，10之间通过频分复用进行区分。
或者，在进行秩为1的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度被减少；在进行秩为2-8的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度不变。
或者，在进行秩为1-2的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度被减少；在进行秩为3-8的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度不变。
如图14所示，该DM-RS的资源配置装置1400还可以包括：
信令发送单元1402，向所述用户设备发送信令来指示DM-RS所使用的资源粒子的信息，其中所述信息指示所述资源粒子在所述子帧中的位置和/或数目。
其中，所述信令指示的信息包括：所述用户设备的DM-RS所使用的资源粒子密度、所述用户设备对应的组信息以及MU-MIMO的DM-RS总共使用的资源粒子数目；或者包括：所述用户设备的DM-RS所使用的资源粒子密度，以及MU-MIMO的DM-RS总共使用的资源粒子数目。
此外，所述信令还可以用于指示对DM-RS进行速率匹配的信息。
本实施例还提供一种基站，配置有如上所述的DM-RS的资源配置装置1400。
图15是本发明实施例的基站的一构成示意图。如图15所示，基站1500可以包括：中央处理器(CPU)200和存储器210；存储器210耦合到中央处理器200。其中该存储器210可存储各种数据；此外还存储信息处理的程序，并且在中央处理器200的控制下执行该程序，以接收该用户设备发送的各种信息、并且向用户设备发送 请求信息。
其中，中央处理器200可以被配置为实现DM-RS的资源配置装置1400的功能。基站1500可以实现如实施例1至3所述的DM-RS的资源配置方法。
此外，如图15所示，基站1500还可以包括：收发机220和天线230等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，基站1500也并不是必须要包括图15中所示的所有部件；此外，基站1500还可以包括图15中没有示出的部件，可以参考现有技术。
由上述实施例可知，基站为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；其中，将传输DM-RS的资源粒子分为多组，不同组的所述资源粒子对应不同的用户设备。由此，不仅可以使得用户设备支持高维MU-MIMO，而且可以减少中心用户设备的DM-RS密度以提高资源利用率。
实施例5
本发明实施例提供一种通信***，图16是本发明实施例的通信***的一构成示意图。如图16所示，该通信***1600包括基站1601以及用户设备1602。其中基站1601中配置有如实施例4所述的DM-RS的资源配置装置1400。
本发明实施例还提供一种计算机可读程序，其中当在基站中执行所述程序时，所述程序使得计算机在所述基站中执行实施例1至3所述的DM-RS的资源配置方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在基站中执行实施例1至3所述的DM-RS的资源配置方法。
本发明以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本发明涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。本发明还涉及用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，还可以实现为计算设备的组合， 例如，DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本发明进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本发明保护范围的限制。本领域技术人员可以根据本发明的精神和原理对本发明做出各种变型和修改，这些变型和修改也在本发明的范围内。

Claims (20)

  1. 一种DM-RS的资源配置方法，应用于3D MIMO***中，所述方法包括：
    基站为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；
    其中，将一个子帧中传输DM-RS的资源粒子分为多组，使得为至少一个用户设备或流传输DM-RS的资源粒子的密度被降低。
  2. 根据权利要求1所述的方法，其中，所述传输DM-RS的资源粒子为一个子帧的时频资源中的OFDM符号为5、6、12、13且子载波序号为1、6、11的12个资源粒子，和/或，OFDM符号为5、6、12、13且子载波序号为0、5、10的12个资源粒子；所述资源粒子被分为多组。
  3. 根据权利要求2所述的方法，其中，OFDM符号为5、6且子载波序号为0、1、10、11的8个资源粒子以及OFDM符号为12、13且子载波序号为5、6的4个资源粒子被分为一组，OFDM符号为12、13且子载波序号为0、1、10、11的8个资源粒子以及OFDM符号为5、6且子载波序号为5、6的4个资源粒子被分为另一组；
    或者，OFDM符号为5、6且子载波序号为0、1、5、6、10、11的12个资源粒子被分为一组，OFDM符号为12、13且子载波序号为0、1、5、6、10、11的12个资源粒子被分为另一组；
    或者，OFDM符号为5、6且子载波序号为5、6、10、11的8个资源粒子以及OFDM符号为12、13且子载波序号为0、1的4个资源粒子被分为一组，OFDM符号为12、13且子载波序号为5、6、10、11的8个资源粒子以及OFDM符号为5、6且子载波序号为0、1的4个资源粒子被分为另一组；
    或者，OFDM符号为5、6且子载波序号为0、1、5、6的8个资源粒子以及OFDM符号为12、13且子载波序号为10、11的4个资源粒子被分为一组，OFDM符号为12、13且子载波序号为0、1、5、6的8个资源粒子以及OFDM符号为5、6且子载波序号为10、11的4个资源粒子被分为另一组；
    或者，OFDM符号为5、6且子载波序号为10、11的4个资源粒子以及OFDM符号为12、13且子载波序号为10、11的4个资源粒子被分为一组，OFDM符号为5、6且子载波序号为5、6的4个资源粒子以及OFDM符号为12、13且子载波序号为5、6的4个资源粒子被分为另一组，OFDM符号为5、6且子载波序号为0、1的4个资 源粒子以及OFDM符号为12、13且子载波序号为0、1的4个资源粒子被分为另一组；
    或者，OFDM符号为5、6且子载波序号为10、11的4个资源粒子以及OFDM符号为12、13且子载波序号为5、6的4个资源粒子被分为一组，OFDM符号为5、6且子载波序号为5、6的4个资源粒子以及OFDM符号为12、13且子载波序号为0、1的4个资源粒子被分为另一组，OFDM符号为5、6且子载波序号为0、1的4个资源粒子以及OFDM符号为12、13且子载波序号为10、11的4个资源粒子被分为另一组。
  4. 根据权利要求1所述的方法，其中，将所述多组中的一组资源粒子映射到某一用户设备或流的端口7，8，将另一组资源粒子映射到另一用户设备或流的端口7，8；和/或将一组资源粒子映射到某一用户设备或流的端口9，10，将另一组资源粒子映射到另一用户设备或流的端口9，10。
  5. 根据权利要求4所述的方法，其中，
    端口7，8被映射到OFDM符号为5、6且子载波序号为1的两个资源粒子，OFDM符号为12、13且子载波序号为6的两个资源粒子，以及OFDM符号为5、6且子载波序号为11的两个资源粒子上；或者，端口7，8被映射到OFDM符号为5、6且子载波序号为6的两个资源粒子，OFDM符号为12、13且子载波序号为1的两个资源粒子，以及OFDM符号为12、13且子载波序号为11的两个资源粒子上；
    端口9，10被映射到OFDM符号为5、6且子载波序号为0的两个资源粒子，OFDM符号为12、13且子载波序号为5的两个资源粒子，以及OFDM符号为5、6且子载波序号为10的两个资源粒子上；或者，端口9，10被映射到OFDM符号为5、6且子载波序号为5的两个资源粒子，OFDM符号为12、13且子载波序号为0的两个资源粒子，以及OFDM符号为12、13且子载波序号为10的两个资源粒子上。
  6. 根据权利要求4所述的方法，其中，在进行秩为1-4的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度被减少；在进行秩为5-8的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度不变。
  7. 根据权利要求1所述的方法，其中，将所述多组中的一组资源粒子映射到端口7，将另一组资源粒子映射到端口8，将另一组资源粒子映射到端口9，将另一组 资源粒子映射到端口10。
  8. 根据权利要求7所述的方法，其中，
    端口7被映射到OFDM符号为5、6且子载波序号为1的两个资源粒子，OFDM符号为12、13且子载波序号为6的两个资源粒子，以及OFDM符号为5、6且子载波序号为11的两个资源粒子上；
    端口8被映射到OFDM符号为5、6且子载波序号为6的两个资源粒子，OFDM符号为12、13且子载波序号为1的两个资源粒子，以及OFDM符号为12、13且子载波序号为11的两个资源粒子上；
    端口9被映射到OFDM符号为5、6且子载波序号为0的两个资源粒子，OFDM符号为12、13且子载波序号为5的两个资源粒子，以及OFDM符号为5、6且子载波序号为10的两个资源粒子上；
    端口10被映射到OFDM符号为5、6且子载波序号为5的两个资源粒子，OFDM符号为12、13且子载波序号为0的两个资源粒子，以及OFDM符号为12、13且子载波序号为10的两个资源粒子上。
  9. 根据权利要求7所述的方法，其中，在进行秩为1-4的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度被减少；在进行秩为5-8的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度不变；
    或者，在进行秩为1的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度被减少；在进行秩为2-8的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度不变；
    或者，在进行秩为1-2的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度被减少；在进行秩为3-8的传输时，将DM-RS的端口映射到资源粒子上使得DM-RS所使用的资源粒子的密度不变。
  10. 根据权利要求9所述的方法，其中，端口7，8之间或者端口9，10之间通过时分复用或码分复用进行区分；端口7，8和端口9，10之间通过频分复用进行区分。
  11. 根据权利要求1所述的方法，其中，所述方法还包括：
    所述基站向所述用户设备发送信令来指示DM-RS所使用的资源粒子的信息，其中所述信息指示所述资源粒子在所述子帧中的位置和/或数目。
  12. 根据权利要求11所述的方法，其中，所述信令指示的信息包括：所述用户设备的DM-RS所使用的资源粒子密度、所述用户设备的DMRS所使用的资源对应的组信息以及MU-MIMO时DM-RS总共使用的资源粒子数目；
    或者包括：所述用户设备的DM-RS所使用的资源粒子密度，以及DM-RS总共使用的资源粒子数目。
  13. 根据权利要求12所述的方法，其中，所述信令为动态信令，所述动态信令包括3比特信息；所述3比特信息指示如下8个状态：
    对于所述用户设备的DM-RS使用12个资源粒子时，MU-MIMO时DM-RS总共使用的资源粒子数目为12和24的两个状态；
    对于所述用户设备的DM-RS使用6个资源粒子时，使用第一组DM-RS资源，MU-MIMO时DM-RS总共使用的资源粒子数目为6、12和24的三个状态；
    对于所述用户设备的DM-RS使用6个资源粒子时，使用第二组DM-RS资源，MU-MIMO时DM-RS总共使用的资源粒子数目为6、12和24的三个状态。
  14. 根据权利要求12所述的方法，其中，所述信令为动态信令，
    所述动态信令包括3比特信息；其中1比特信息指示所述用户设备的DM-RS使用6资源粒子还是12资源粒子，另2比特信息指示MU-MIMO时DM-RS总共使用的资源粒子数目为6、12、18、24；
    或者，所述动态信令包括2比特信息；其中1比特信息指示所述用户设备的DM-RS使用6资源粒子还是12资源粒子，另1比特信息指示MU-MIMO时DM-RS总共使用的资源粒子数目为12、24。
  15. 根据权利要求12所述的方法，其中，所述信令为高层信令和动态信令，所述高层信令指示：该用户设备的DM-RS使用6个资源粒子还是12个资源粒子；
    所述动态信令包括3比特信息，其中1比特信息指示所述用户设备的DM-RS使用第一组还是第二组的资源，另1比特信息指示没有被所述用户设备使用的组的资源是否被使用，另1比特信息指示DM-RS所使用的总共24个资源粒子是否都被占用。
  16. 根据权利要求12所述的方法，其中，所述信令为高层信令和动态信令，所述高层信令指示：该用户设备的DM-RS使用6个资源粒子还是12个资源粒子；
    所述动态信令指示：进行MU-MIMO时DM-RS总共占用的资源数目为6RE还是12RE、18RE、24RE；或者，所述动态信令指示：进行MU-MIMO时DM-RS总共 占用的资源数目为12RE还是24RE。
  17. 根据权利要求13所述的方法，其中，所述信令还用于指示对DM-RS进行速率匹配的信息。
  18. 一种DM-RS的资源配置装置，应用于3D MIMO***中，所述装置包括：
    资源配置单元，为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；
    其中，将一个子帧中传输DM-RS的资源粒子分为多组，使得为至少一个用户设备或流传输DM-RS的资源粒子的密度被降低。
  19. 根据权利要求18所述的装置，其中，所述装置还包括：
    信令发送单元，向所述用户设备发送信令来指示DM-RS所使用的资源粒子的信息，其中所述信息指示所述资源粒子在所述子帧中的位置和/或数目。
  20. 一种通信***，所述通信***包括：
    基站，为进行MU-MIMO的多个用户设备配置传输DM-RS的资源；其中，将一个子帧中传输DM-RS的资源粒子分为多组，使得为至少一个用户设备或流传输DM-RS的资源粒子的密度被降低。
PCT/CN2014/090648 2014-11-07 2014-11-07 Dm-rs的资源配置方法、装置以及通信*** WO2016070430A1 (zh)

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