WO2017050212A1 - 一种导频分配的方法及装置 - Google Patents

一种导频分配的方法及装置 Download PDF

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Publication number
WO2017050212A1
WO2017050212A1 PCT/CN2016/099464 CN2016099464W WO2017050212A1 WO 2017050212 A1 WO2017050212 A1 WO 2017050212A1 CN 2016099464 W CN2016099464 W CN 2016099464W WO 2017050212 A1 WO2017050212 A1 WO 2017050212A1
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Prior art keywords
port
allocated
ues
ports
assigned
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PCT/CN2016/099464
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English (en)
French (fr)
Inventor
黄晖
钱丰勇
詹奇聪
方冬梅
胥恒
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华为技术有限公司
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Priority to EP16848093.7A priority Critical patent/EP3346653A4/en
Publication of WO2017050212A1 publication Critical patent/WO2017050212A1/zh
Priority to US15/934,357 priority patent/US20180212730A1/en

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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
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/0026—Interference mitigation or co-ordination of multi-user interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/18—Allocation of orthogonal codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for pilot allocation.
  • MIMO Multi-input Multi-output
  • MUBF Multi-User Beam Forming
  • the pilot is divided into orthogonal pilot and pseudo-orthogonal pilot.
  • the orthogonal pilot transmits the pilot signal by using different ports
  • the pseudo-orthogonal pilot transmits the pilot signal by using different pseudo-random sequences of the same port.
  • the prior art adopts the spatial division multiplexing technology of DRS pilots.
  • the same pilot signal is used for users with higher spatial dimension discrimination, thereby achieving MUBF pairing of more than four streams.
  • Embodiments of the present invention provide a method and apparatus for pilot allocation, which can solve the problem of generating large pilot interference between MUBF paired users.
  • an embodiment of the present invention provides a method for pilot allocation, including:
  • the base station sets the number of superimposed orthogonal codes OCC according to the number of ports to be allocated;
  • the base station determines a pilot allocation result according to the number of the to-be-assigned ports, the number of the OCCs, and the number of the UEs.
  • the base station includes downlink control information DCI, where the DCI includes a first field for carrying an N SCID , and is configured to carry at least two bits to be allocated. a second field of port number information, the N SCID generating a seed for a pseudo-random sequence of the port to be allocated;
  • the method further includes:
  • the base station sets the N SCID in the first field of the DCI according to the result of the pilot allocation, sets the to-be-assigned port number information in the second field of the DCI, and sends the information to the UE.
  • the base station is configured according to the number of ports to be allocated, the number of the OCCs, and the number of the UEs. Determine the pilot allocation results, including:
  • the base station allocates a resource element RE resource to the to-be-assigned port according to the number of the OCCs and the number of the to-be-assigned ports, where the number of the OCCs is the number of ports to be allocated that can occupy the RE resources of the same location;
  • the base station determines that the pilot allocation result is that each UE corresponds to one to be allocated port, and the value of the N SCID corresponding to each to-be-assigned port is the same. ;
  • the base station determines that the pilot allocation result is one or two UEs corresponding to each to-be-assigned port;
  • the value of the N SCID of each port to be allocated is the same;
  • the values of the N SCIDs of the same to-be-assigned port corresponding to the two UEs are different.
  • the number of OCCs is 4, the number of ports to be allocated is 4; and the base station is configured according to the number of ports to be allocated. Determining the pilot allocation result by the number of the OCCs and the number of the UEs, including:
  • the base station determines that the pilot allocation result is that each UE corresponds to one to be allocated port, and the value of the N SCID corresponding to each of the to-be-assigned ports is 1 or All are 0;
  • the base station determines that the pilot allocation result is one or two UEs corresponding to each to-be-assigned port;
  • the value of the N SCID of each port to be allocated is 1 or both;
  • the values of the N SCIDs of the same to-be-assigned port corresponding to the two UEs are 0 and 1, respectively.
  • the number of the OCC is 4, the number of ports to be allocated is 8; and the base station is configured according to the newly added port to be allocated.
  • the base station allocates a first bit to each of the four to-be-assigned ports according to the OCC.
  • the RE resource is allocated, and the other four ports to be allocated are allocated the RE resource of the second location;
  • the base station determines that the pilot allocation result is that each UE corresponds to one to be allocated port, and the value of the N SCID corresponding to each of the to-be-assigned ports is 1 or All are 0;
  • the base station determines that the pilot allocation result is one or two UEs corresponding to each to-be-assigned port;
  • the value of the N SCID of each port to be allocated is 1 or both;
  • the values of the N SCIDs of the same to-be-assigned port corresponding to the two UEs are 0 and 1, respectively.
  • an embodiment of the present invention provides a device for pilot allocation, where the device includes:
  • a determining unit configured to determine a UE that needs to perform MUBF pairing, and a to-be-assigned port, where the to-be-assigned port includes two original pilot ports for MUBF pairing and at least one newly added pilot port for MUBF pairing ;
  • a setting unit configured to set a quantity of the superposed orthogonal code OCC according to the number of the ports to be allocated
  • the determining unit is further configured to determine a pilot allocation result according to the number of the to-be-assigned ports, the number of the OCCs, and the number of the UEs.
  • the base station includes downlink control information DCI, where the DCI includes a first field for carrying an N SCID , and is configured to carry at least two bits to be allocated. a second field of port number information, wherein the N SCID generates a seed for a pseudo-random sequence of the port to be allocated; the apparatus further includes: a sending unit;
  • the sending unit is configured to set the N SCID in the first field of the DCI according to the pilot allocation result, set the to-be-assigned port number information in the second field of the DCI, and send the information to the UE.
  • the determining unit is further configured to: according to the number of the OCCs and the number of ports to be allocated Determining the allocated port allocation resource element RE resource, the number of the OCC being the number of ports to be allocated that can occupy the RE resource of the same location; determining the pilot allocation when the number of the UE is less than or equal to the first preset value The result is that each UE corresponds to a port to be allocated, and the value of the N SCID corresponding to each port to be allocated is the same; when the number of the UE is greater than the first preset value and less than or equal to the second preset value, Determining the result of the pilot allocation is one or two UEs corresponding to each port to be allocated; when there is one UE corresponding to each port to be allocated, the value of the N SCID of each port to be allocated is the same; When the allocation port corresponds to two UEs, the value of the N SCID corresponding to the same
  • the number of OCCs is 4, and the number of ports to be allocated is 4;
  • the determining unit is further configured to allocate, according to the OCC, the RE resource of the first location to the to-be-assigned port; when the number of the UE is less than or equal to 4, determine that the pilot allocation result is one for each UE a port to be allocated, and the value of the N SCID corresponding to each of the to-be-assigned ports is 1 or both; when the number of UEs is greater than 4 and less than or equal to 8, the pilot allocation result is determined to be
  • the number of the to-be-assigned ports corresponds to one or two UEs; when there is one UE to be allocated, the value of the N SCID of each port to be allocated is 1 or both; In the case of two UEs, the values of the N SCIDs of the same to-be-assigned port corresponding to the two UEs are 0 and 1, respectively.
  • the number of OCCs is 4, and the number of ports to be allocated is 8;
  • the determining unit is further configured to allocate, according to the OCC, the RE resources of the first location to the four to-be-assigned ports, and allocate the RE resources of the second location to the other four to-be-assigned ports; when the number of the UEs is less than or equal to 8 And determining that the pilot allocation result is that each UE corresponds to one port to be allocated, and the value of the N SCID corresponding to each of the to-be-assigned ports is 1 or both; when the number of UEs is greater than 8 And when the value is less than or equal to 16, the pilot allocation result is determined to be one or two UEs corresponding to each to-be-assigned port; and when there is one UE corresponding to each to-be-assigned port, the value of the N SCID of each to-be-assigned port is determined. All of them are 1 or both. When there are two UEs corresponding to each port to be allocated, the values of N SCIDs of the same to-be-assigned port corresponding
  • a base station determines a UE that needs to perform MUBF pairing, and a port to be allocated, the port to be allocated may include a newly added pilot port, and then sets the number of OCC according to the number of ports to be allocated, and further The pilot allocation result is determined according to the number of ports to be allocated, the number of OCCs, and the number of UEs.
  • the number of OCCs can be set, so that the newly added port can also be used.
  • the RE resources for pilot allocation are occupied, so that the number of pilot ports that can be allocated to the UE is increased, so that different users can use different pilot ports, which reduces pilot interference between UEs.
  • FIG. 1 is a flowchart of a method for pilot allocation according to an embodiment of the present invention
  • FIG. 3 is a flowchart of another method for pilot allocation according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of allocation of a RE resource in a method for pilot allocation according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of another RE resource allocation in a method for pilot allocation according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a logical structure of a device for pilot allocation according to an embodiment of the present invention. schematic diagram;
  • FIG. 7 is a schematic diagram of a logical structure of another apparatus for pilot allocation according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of a logical structure of a base station in a method for pilot allocation according to an embodiment of the present invention.
  • an embodiment of the present invention provides a method for pilot allocation, which is applied to a Massive MIMO system, where a Massive MIMO system includes a base station, and MUBF pairing is required.
  • the UE, the original two are used for the MUBF paired pilot port, and at least one new pilot port for MUBF pairing, as shown in FIG. 1, the method includes:
  • the base station determines a UE that needs to perform MUBF pairing and a port to be allocated.
  • the port to be allocated includes at least two original pilot ports for MUBF pairing, and may also include a new pilot port for MUBF pairing.
  • MUBF pairing is to pair at least two UEs, so that at least two UEs multiplex the same time-frequency resource
  • the 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) protocol stipulates that TM (Transmission Mode) 8/TM9 can only use Port (port) when performing MUBF pairing. 7 and Port8 are two pilot ports.
  • the UEs that do not perform MUBF pairing can use the ports of port 9 to port 13.
  • ports 9 to 13 can also be used when performing MUBF pairing.
  • the base station sets an OCC (Orthogonal Cover Code) quantity according to the number of ports to be allocated.
  • OCC Orthogonal Cover Code
  • the RE resource ports occupying the same location are distinguished by different OCC codes. For example, if both port 7 and port 8 occupy the RE resources of the first location, the OCC code corresponding to port 7 is different from the OCC code corresponding to port 8.
  • the number of OCCs is the same as the number of ports to be allocated.
  • the number of OCCs can be set to 4, and the ports to be allocated are set differently.
  • the OCC code causes the four ports to be allocated to occupy the RE resources of the same location.
  • the number of OCCs does not exceed 4, and when the number of ports to be allocated exceeds 4, at least one set of available RE (Resource Element) resources can be newly added to the ports to be allocated, so that up to 4 ports to be allocated are added. Own RE resources in the same location.
  • RE Resource Element
  • the number of OCCs when the number of OCCs is 2, the RE resources in the same location can be occupied by two different ports. When the number of OCCs is 4, the RE resources in the same location can be occupied by four different ports, because In the prior art, the number of OCCs is fixed to 2, so the RE resources in the same location can be used by only two ports. In the embodiment of the present invention, the number of OCCs can be set, so that the RE resources in the same location can be used by more ports, so that the new The pilot port can also be used for MUBF pairing between UEs.
  • the base station determines a pilot allocation result according to the number of ports to be allocated, the number of OCCs, and the number of UEs.
  • the base station determines the UE that needs to perform MUBF pairing, and the port to be allocated, the port to be allocated may include a newly added pilot port, and then sets the number of OCC according to the number of ports to be allocated, and then according to the The number of allocated ports, the number of OCCs, and the number of UEs determine the pilot allocation result.
  • the number of OCCs can be set, so that the newly added port can also be used. Occupy RE resources for pilot allocation
  • the source, and thus the number of pilot ports that can be allocated to the UE, is increased, so that different users can use different pilot ports, reducing pilot interference between UEs.
  • the base station After determining the pilot allocation result, the base station further needs to inform the UE of the pilot allocation result, so that the UE performs channel estimation.
  • the base station includes DCI (Downlink Control). Information, downlink control information), the DCI includes a first field for carrying the N SCID , and a second field for carrying at least two bits of the port number to be allocated, and the N SCID generates a seed for the pseudo-random sequence of the port to be allocated.
  • step 104 is further included.
  • the base station sets the N SCID in the first field of the DCI according to the pilot allocation result, sets the to-be-assigned port number information in the second field of the DCI, and sends the information to the UE.
  • the bit used for sending the port number in the second field of the DCI is determined according to the number of ports to be allocated. For example, when the number of ports to be allocated is 8, 3 bits can be used, and 000, 001, ..., 111 respectively Represents 8 ports to be assigned.
  • the first field is 0, and the second field is 100, so that the UE reads the DCI. Determine which port is assigned and the N SCID .
  • step 103 the base station determines a pilot allocation result according to the number of ports to be allocated, the number of OCCs, and the number of UEs, which may be implemented as steps. 301 to step 303.
  • the base station allocates RE resources to the to-be-assigned port according to the number of OCCs and the number of ports to be allocated.
  • the number of OCCs is the number of ports to be allocated that can occupy the RE resources of the same location.
  • the ports to be allocated are allocated with the RE resources of the same location, and the ports to be allocated occupying the same location RE resources are distinguished by different OCCs;
  • the RE resources of the first location are allocated for the number of OCC ports to be allocated. If the number of remaining ports to be allocated is less than or equal to the number of OCCs at this time, the RE resources of the second location are allocated to the remaining ports to be allocated.
  • the port to be allocated can be allocated to the UE after the RE resource is allocated to the port to be allocated.
  • the base station determines that the pilot allocation result is that each UE corresponds to one to be allocated port, and the value of the N SCID corresponding to each to-be-assigned port is the same.
  • the base station determines that the pilot allocation result is one or two UEs corresponding to each to-be-assigned port.
  • the value of the N SCID of each port to be allocated is the same;
  • the values of the N SCIDs of the same to-be-assigned port corresponding to the two UEs are different.
  • the embodiments of the present invention include at least the following two implementation manners.
  • the number of OCCs is 4, and the number of ports to be allocated is 4.
  • the ports to be allocated include ports 7 and port 8 to be allocated, and ports 11 and 13 to be newly added.
  • the four ports to be allocated occupy REs in 12 DRSs in one time slot, as shown in FIG. 4, and FIG. 4 takes the TDD ratio as 1 or 2 or 6 or 7 as an example, and the shaded portion represents the occupied port to be allocated.
  • the RE resources, port 7, port 8, port 11, and port 13 occupy the RE resources of the same location, and the ports to be allocated occupying the same location RE resources are distinguished by different OCC mapping sequences, and the OCC mapping sequence corresponding to each port to be allocated is as shown in Table 1.
  • the base station determines that the pilot allocation result is that each UE corresponds to one port to be allocated, and the value of the N SCID corresponding to each port to be allocated is 1 or both.
  • the base station determines that the pilot allocation result is one or two UEs corresponding to each to-be-assigned port.
  • the value of the N SCID of each port to be allocated is 1 or both;
  • the values of the N SCIDs of the same to-be-assigned port corresponding to the two UEs are 0 and 1, respectively.
  • the number of ports to be allocated is increased, and the DRS orthogonal pilot allocation of the MUBF4 stream and the DRS pseudo-orthogonal pilot allocation of the 8 streams are supported, and no space division is needed.
  • the multiplexing reduces the pilot interference between the UEs, and the number of REs to be allocated by the port to be allocated in one slot is still 12, which does not occupy additional RE resources compared with the prior art.
  • the number of OCCs is 4, and the number of ports to be allocated is 8.
  • the ports to be allocated include the ports to be allocated port 7 and port 8, and the ports to be allocated port 11 to port 14.
  • Each of the four ports shares a group of RE resources in the same location. For example, as shown in FIG. 5, port 7, port 8, port 11, and port 13 share the RE resource of the first location, and port 9, port 10, port 12, and port 14 share the second location. RE resources.
  • the OCC mapping sequence corresponding to each port to be allocated is distinguished by a different OCC mapping sequence to distinguish the ports to be allocated that occupy the same location RE resources. As shown in Table 6.
  • OCC mapping sequence 7 [+1+1+1+1] 8 [+1-1+1-1] 9 [+1+1+1] 10 [+1-1+1-1] 11 [+1+1-1-1] 12 [-1-1+1+1] 13 [+1-1-1+1] 14 [-1+1+1-1]
  • the base station determines that the pilot allocation result is that each UE corresponds to one port to be allocated, and the value of the N SCID corresponding to each port to be allocated is 1 or both.
  • the UABF pairing of the UE does not need to use pseudo-orthogonal pilots, and the number of UEs is 8 as an example, and two The results of the pilot allocation are shown in Tables 7 and 8.
  • the base station determines that the pilot allocation result is one or two UEs corresponding to each to-be-assigned port.
  • the value of the N SCID of each port to be allocated is 1 or both;
  • the values of the N SCIDs of the same to-be-assigned port corresponding to the two UEs are 0 and 1, respectively.
  • the DRS orthogonal pilot allocation of the MUBF8 stream and the DRS pseudo-orthogonal pilot allocation of the 16 streams can be supported due to the increase of the number of ports to be allocated, and no space division is needed. Multiplexing reduces pilot interference between UEs.
  • an embodiment of the present invention provides a device for pilot allocation, which is applied to a base station.
  • the device includes: a determining unit. 601, setting unit 602.
  • a determining unit 601 configured to determine a UE that needs to perform MUBF pairing, and a port to be allocated, where the to-be-assigned port includes two original pilot ports for MUBF pairing and at least one newly added pilot port for MUBF pairing, MUBF pairing is to pair at least two UEs, so that at least two UEs multiplex the same time-frequency resource;
  • the setting unit 602 is configured to set the number of superimposed orthogonal codes OCC according to the number of ports to be allocated;
  • the determining unit 601 is further configured to determine a pilot allocation result according to the number of ports to be allocated, the number of OCCs, and the number of UEs.
  • the base station includes downlink control information DCI, where the DCI includes a first field for carrying the N SCID , and a second field for carrying at least two bits of the port number to be allocated, N SCID Generating a seed for the pseudo-random sequence of the port to be allocated; as shown in FIG. 7, the apparatus further includes: a sending unit 603;
  • the sending unit 603 is configured to set the N SCID in the first field of the DCI according to the pilot allocation result, set the to-be-assigned port number information in the second field of the DCI, and send the information to the UE.
  • the determining unit 601 is further configured to allocate a resource element RE resource to the to-be-assigned port according to the number of OCCs and the number of ports to be allocated, where the number of OCCs is the number of ports to be allocated that can occupy the RE resources of the same location.
  • the number of UEs is less than or equal to the first preset value, determining that the pilot allocation result is that each UE corresponds to one port to be allocated, and the value of the N SCID corresponding to each port to be allocated is the same; a preset value, and less than or equal to the second preset value, determining that the pilot allocation result is one or two UEs corresponding to each port to be allocated; and when there is one UE corresponding to each to-be-assigned port, each to be allocated
  • the values of the N SCIDs of the ports are the same. When there are two UEs corresponding to the ports to be allocated, the values of the N SCIDs of the same to-be-assigned ports of the two UEs are different.
  • the number of OCCs is 4, and the number of ports to be allocated is 4;
  • the determining unit 601 is further configured to allocate, according to the OCC, the RE resource of the first location to the to-be-assigned port; when the number of the UE is less than or equal to 4, determine that the pilot allocation result is that each UE corresponds to one to-be-assigned port, and each to be allocated The value of the N SCID corresponding to the port is 1 or both.
  • the pilot allocation result is determined to be one or two UEs corresponding to each port to be allocated;
  • the value of the N SCID of each port to be allocated is 1 or both; when there are two UEs corresponding to each port to be allocated, the same port to be allocated corresponding to the two UEs
  • the values of N SCID are 0 and 1, respectively.
  • the number of OCCs is 4, and the number of ports to be allocated is 8.
  • the determining unit 601 is further configured to allocate, according to the OCC, the RE resource of the first location to the four ports to be allocated, and allocate the RE resource of the second location to the other four to-be-assigned ports; and determine the pilot when the number of the UE is less than or equal to 8.
  • the result of the allocation is that each UE corresponds to one port to be allocated, and the value of the N SCID corresponding to each port to be allocated is 1 or both; when the number of UEs is greater than 8 and less than or equal to 16, the pilot allocation is determined.
  • each port to be allocated corresponds to one or two UEs; when there is one UE corresponding to each port to be allocated, the value of the N SCID of each port to be allocated is 1 or both; When the allocation port corresponds to two UEs, the values of the N SCIDs of the same to-be-assigned port corresponding to the two UEs are 0 and 1, respectively.
  • the determining unit determines the UE that needs to perform MUBF pairing, and the port to be allocated, the port to be allocated may include a newly added pilot port, and then the setting unit sets the number of OCC according to the number of ports to be allocated. Further, the determining unit determines a pilot allocation result according to the number of ports to be allocated, the number of OCCs, and the number of UEs.
  • the number of OCCs can be set, so that the newly added port can also be used.
  • the RE resources for pilot allocation are occupied, so that the number of pilot ports that can be allocated to the UE is increased, so that different users can use different pilot ports, which reduces pilot interference between UEs.
  • FIG. 8 is a schematic structural diagram of a hardware structure of the base station depicted in FIG.
  • the base station may include a memory 801, a transmitter 802, a processor 803, and a bus 804.
  • the memory 801, the transmitter 802, and the processor 803 are communicably connected by a bus 804.
  • the memory 801 may be a read only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM).
  • the memory 801 can store an operating system and other applications.
  • the program code for implementing the technical solution provided by the embodiment of the present invention is stored in the memory 801 and executed by the processor 803.
  • the transmitter 802 is used for communication between the device and other devices or communication networks such as, but not limited to, Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), and the like.
  • RAN Radio Access Network
  • WLAN Wireless Local Area Network
  • the processor 803 can be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for executing.
  • the related program is implemented to implement the technical solution provided by the embodiment of the present invention.
  • Bus 804 can include a path for communicating information between various components of the device, such as memory 801, transmitter 802, and processor 803.
  • FIG. 8 only shows the memory 801, the transmitter 802 and the processor 803, and the bus 804, in a specific implementation process, those skilled in the art should understand that the base station also includes normal operation. Other devices necessary. At the same time, those skilled in the art will appreciate that hardware devices that implement other functions may also be included, depending on the particular needs.
  • the processor 803 in the apparatus is coupled to the memory 801 and the transmitter 802 for controlling execution of program instructions. Specifically, it is used to determine a UE that needs to perform MUBF pairing and a port to be allocated.
  • the to-be-assigned port includes two original pilot ports for MUBF pairing and at least one new pilot port for MUBF pairing, and the MUBF pairing is Pairing at least two UEs, so that at least two UEs multiplex the same time-frequency resource; setting the number of superimposed orthogonal codes OCC according to the number of ports to be allocated; determining the number according to the number of ports to be allocated, the number of OCCs, and the number of UEs Frequency allocation results.
  • the memory 801 is configured to store downlink control information DCI, where the DCI includes a first field for carrying the N SCID , and a second field for carrying at least two bits of the port number to be allocated, where the N SCID is a pseudo of the port to be allocated. Random sequences generate seeds.
  • the transmitter 802 is configured to set the N SCID in the first field of the DCI according to the pilot allocation result, set the to-be-assigned port number information in the second field of the DCI, and send the message to the UE.
  • the processor 803 is further configured to allocate a resource element RE resource to the to-be-assigned port according to the number of OCCs and the number of ports to be allocated, where the number of OCCs is the number of ports to be allocated that can occupy the RE resources of the same location; when the number of UEs is less than or equal to the first When the preset value is determined, the pilot allocation result is that each UE corresponds to one port to be allocated, and the value of the N SCID corresponding to each port to be allocated is the same; when the number of UEs is greater than the first preset value, and is less than or equal to When the second preset value is determined, the result of the pilot allocation is determined to be one or two UEs corresponding to each port to be allocated; when there is one UE corresponding to each port to be allocated, the value of the N SCID of each port to be allocated is the same; When there are two UEs corresponding to each port to be allocated, the values of the N SCIDs of the same to-be-assigned port
  • the processor 803 is further configured to allocate a RE resource of the first location to the to-be-assigned port according to the OCC; and when the number of UEs is less than or equal to 4, determine a pilot allocation result.
  • Each of the UEs corresponds to a port to be allocated, and the value of the N SCID corresponding to each port to be allocated is 1 or both.
  • the pilot allocation result is determined to be each.
  • the port to be allocated corresponds to one or two UEs; when there is one UE corresponding to each port to be allocated, the value of the N SCID of each port to be allocated is 1 or both; For each UE, the values of the N SCIDs of the same to-be-assigned port corresponding to the two UEs are 0 and 1, respectively.
  • the processor 803 is further configured to allocate, according to the OCC, the RE resources of the first location to the 4 to-be-assigned ports, and allocate the second location to the other 4 to-be-assigned ports.
  • the pilot allocation result is determined to be one for each UE, and the value of the N SCID corresponding to each port to be allocated is 1 or both;
  • the determined pilot allocation result is one or two UEs corresponding to each to-be-assigned port; when there is one UE corresponding to each to-be-assigned port, the N SCID of each to-be-assigned port is taken.
  • the values are all 1 or both.
  • the values of the N SCIDs of the same to-be-assigned port corresponding to the two UEs are 0 and 1, respectively.
  • the processor determines the UE that needs to perform MUBF pairing, and the port to be allocated, the port to be allocated may include a newly added pilot port, and then sets the number of OCC according to the number of ports to be allocated, and then according to The number of ports to be allocated, the number of OCCs, and the number of UEs determine the pilot allocation result.
  • the method of space division multiplexing is used to make different pilots use the same signal, which leads to a large pilot interference.
  • the newly added ports can also occupy the RE resources for the pilot allocation, so that the number of pilot ports that can be allocated to the UE is increased, so that different users can use different pilot ports, which reduces the UEs. Pilot interference.
  • the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. .
  • the technical solution of the present invention which is essential or contributes to the prior art, can be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
  • a hard disk or optical disk, etc. includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

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Abstract

本发明公开一种导频分配的方法及装置，涉及无线通信技术领域，可以解决MUBF配对用户之间产生较大导频干扰的问题。本发明实施例通过基站确定需要进行多用户波束赋形MUBF配对的用户设备UE以及待分配端口，根据待分配端口的数量设置叠加正交码OCC数量；进而根据待分配端口的数量、OCC数量以及UE的数量，确定导频分配结果。本发明实施例提供的方案适于分配导频时采用。

Description

一种导频分配的方法及装置
本申请要求于2015年09月25日提交中国专利局、申请号为201510624070.9、发明名称为“一种导频分配的方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域，尤其涉及一种导频分配的方法及装置。
背景技术
MIMO(Multi-input Multi-output，多入多出)技术被认为是未来无线通信系统的关键技术之一，MIMO正在向天线数更多的Massive MIMO演进。为了提高网络容量和小区吞吐量，可在Massive MIMO系统中利用MUBF(Multi-User Beam Forming，多用户波束赋形)将多个下行用户数据复用到相同的时频资源上，因为多个用户需共用相同的时频资源，所以配对用户需通过不同的导频进行信道估计。导频分为正交导频和伪正交导频，正交导频为采用不同端口发送导频信号，伪正交导频为采用相同端口不同伪随机序列发送导频信号。
目前，在Massive MIMO系统中，在MUBF配对时只能使用两个导频端口，即最多只支持四个用户MUBF的DRS(UE-specific Reference Signal,用户专用解调参考信号)导频分配，但是随着天线数目的不断增多，最大四流的MUBF配对限制了无线网络容量的进一步提高，为解决更多流MUBF配对导频分配不足的问题，现有技术通过DRS导频的空分复用技术，对空间维度区分度较高的用户使用相同的导频信号，从而实现了最大四流以上的MUBF配对。
然而，由于MUBF的配对用户数超过4个时，部分用户就必须复用相同的导频信号，使得小区内用户之间产生较大的导频干 扰。
发明内容
本发明的实施例提供一种导频分配的方法及装置，可以解决MUBF配对用户之间产生较大导频干扰的问题。
为达到上述目的，本发明的实施例采用如下技术方案：
第一方面，本发明实施例提供一种导频分配的方法，包括：
基站确定需要进行MUBF配对的UE以及待分配端口，所述待分配端口包括原有的两个用于MUBF配对的导频端口以及至少一个新增的用于MUBF配对的导频端口；
所述基站根据所述待分配端口的数量设置叠加正交码OCC数量；
所述基站根据所述待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果。
在第一种可能的实施例中，结合第一方面，所述基站中包括下行控制信息DCI，所述DCI中包括用于携带NSCID的第一字段，以及用于携带至少两比特的待分配端口号信息的第二字段，所述NSCID为待分配端口的伪随机序列生成种子；
在所述基站根据所述待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果之后，所述方法还包括：
所述基站根据所述导频分配结果，将NSCID设置于DCI的第一字段中，将待分配端口号信息设置于DCI的第二字段中，并发送给所述UE。
在第二种可能的实施例中，结合第一方面或第一方面中第一种可能的实施例，所述基站根据所述待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果，包括：
所述基站根据所述OCC数量以及所述待分配端口数量为所述待分配端口分配资源元素RE资源，所述OCC数量为可占用同一位置的RE资源的待分配端口的数量；
当所述UE数量小于或等于第一预设值时，所述基站确定所 述导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值相同；
当所述UE数量大于第一预设值，且小于或等于第二预设值时，所述基站确定所述导频分配结果为每个待分配端口对应一个或两个UE；
当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值相同；
当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值不同。
在第三种可能的实施例中，结合第一方面中第二中可能的实施例，所述OCC数量为4，所述待分配端口数量为4；所述基站根据所述待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果，包括：
所述基站根据所述OCC为所述待分配端口分配第一位置的RE资源；
当所述UE数量小于等于4时，所述基站确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个所述待分配端口对应的NSCID的取值均为1或者均为0；
当所述UE数量大于4且小于或等于8时，所述基站确定所述导频分配结果为每个待分配端口对应一个或两个UE；
当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；
当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
在第四种可能的实施例中，结合第一方面中第二种可能的实施例，所述OCC数量为4，所述待分配端口数量为8；所述基站根据所述新增待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果，包括：
所述基站根据所述OCC为其中4个待分配端口分配第一位 置的RE资源，为另外4个待分配端口分配第二位置的RE资源；
当所述UE数量小于等于8时，所述基站确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个所述待分配端口对应的NSCID的取值均为1或者均为0；
当所述UE数量大于8且小于或等于16时，所述基站确定所述导频分配结果为每个待分配端口对应一个或两个UE；
当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；
当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
第二方面，本发明实施例提供了一种导频分配的装置，所述装置包括：
确定单元，用于确定需要进行MUBF配对的UE以及待分配端口，所述待分配端口包括原有的两个用于MUBF配对的导频端口以及至少一个新增的用于MUBF配对的导频端口；
设置单元，用于根据所述待分配端口的数量设置叠加正交码OCC数量；
所述确定单元，还用于根据所述待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果。
在第一种可能的实施例中，结合第二方面，所述基站中包括下行控制信息DCI，所述DCI中包括用于携带NSCID的第一字段，以及用于携带至少两比特的待分配端口号信息的第二字段，所述NSCID为待分配端口的伪随机序列生成种子；所述装置还包括：发送单元；
所述发送单元，用于根据所述导频分配结果，将NSCID设置于DCI的第一字段中，将待分配端口号信息设置于DCI的第二字段中，并发送给所述UE。
在第二种可能的实施例中，结合第二方面或第二方面中的第一种可能的实施例，所述确定单元，还用于根据所述OCC数量 以及所述待分配端口数量为所述待分配端口分配资源元素RE资源，所述OCC数量为可占用同一位置的RE资源的待分配端口的数量；当所述UE数量小于或等于第一预设值时，确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值相同；当所述UE数量大于第一预设值，且小于或等于第二预设值时，确定所述导频分配结果为每个待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值相同；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值不同。
在第三种可能的实施例中，结合第二方面中第二种可能的实施例，所述OCC数量为4，所述待分配端口数量为4；
所述确定单元，还用于根据所述OCC为所述待分配端口分配第一位置的RE资源；当所述UE数量小于等于4时，确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个所述待分配端口对应的NSCID的取值均为1或者均为0；当所述UE数量大于4且小于或等于8时，确定所述导频分配结果为每个待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
在第四种可能的实施例中，结合第二方面中第二种可能的实施例，所述OCC数量为4，所述待分配端口数量为8；
所述确定单元，还用于根据所述OCC为其中4个待分配端口分配第一位置的RE资源，为另外4个待分配端口分配第二位置的RE资源；当所述UE数量小于等于8时，确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个所述待分配端口对应的NSCID的取值均为1或者均为0；当所述UE数量大于8且小于或等于16时，确定所述导频分配结果为每个待分配端口 对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
本发明实施例提供的导频分配的方法及装置，基站确定需要进行MUBF配对的UE以及待分配端口，待分配端口可以包括新增的导频端口，然后根据待分配端口数量设置OCC数量，进而根据待分配端口的数量、OCC数量以及UE的数量，确定导频分配结果。与现有技术中当用户数超过4个时，采用空分复用的方式使不同用户使用相同信号而导致导频干扰大相比，本发明实施例通过设置OCC数量，使新增端口也可以占用用于导频分配的RE资源，从而可分配给UE的导频端口数量增加，使得不同用户可以使用不同的导频端口，减小了UE之间的导频干扰。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种导频分配的方法的流程图；
图2为本发明实施例提供的另一种导频分配的方法的流程图；
图3为本发明实施例提供的另一种导频分配的方法的流程图；
图4为本发明实施例提供的导频分配的方法中一种RE资源的分配示意图；
图5为本发明实施例提供的导频分配的方法中另一种RE资源的分配示意图；
图6为本发明实施例提供的一种导频分配的装置的逻辑结构 示意图；
图7为本发明实施例提供的另一种导频分配的装置的逻辑结构示意图；
图8为本发明实施例提供的导频分配的方法中基站的逻辑结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
为了减小UE(User Equipment，用户设备)之间的导频干扰，本发明实施例提供一种导频分配的方法，该方法应用于Massive MIMO系统中，Massive MIMO系统包括基站，需要进行MUBF配对的UE，原有的两个用于MUBF配对导频端口，以及至少一个新增的用于MUBF配对的导频端口，如图1所示，该方法包括：
101、基站确定需要进行MUBF配对的UE以及待分配端口。
其中，待分配端口至少包括原有的两个用于MUBF配对的导频端口，还可包括新增的用于MUBF配对的导频端口。MUBF配对为对至少两个UE进行配对，使至少两个UE复用同一时频资源
例如，3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)LTE(Long Term Evolution，长期演进)协议规定TM(Transmission Mode，传输模式)8/TM9在进行MUBF配对时只能使用Port(端口)7和Port8这两个导频端口。通常，不进行MUBF配对的UE可以使用port9至port13这8个端口，而在本发明实施例中，进行MUBF配对时也可以使用port9至port13这些端口。
102、基站根据待分配端口的数量设置OCC(Orthogonal Cover Code，叠加正交码)数量。
需要说明的是，占用相同位置的RE资源端口是通过不同的OCC码进行区分的，例如，port7和port8均占用第一位置的RE资源，则port7对应的OCC码与port8对应的OCC码不同。
此外，当待分配端口的数量小于4时，OCC数量与待分配端口数量相同，例如，当待分配端口的数量为4时，可将OCC数量设置为4，为4个待分配端口分别设置不同的OCC码，使这4个待分配端口占用同一位置的RE资源。
一般情况下，OCC的数量不超过4，当待分配端口的数量超过4个时，可以为待分配端口新增加至少一组可用RE(Resource Element，资源元素)资源，使最多4个待分配端口占用同一位置的RE资源。
可以理解的是，当OCC数量为2时，则同一位置的RE资源可以供两个不同的端口占用，当OCC数量为4时，则同一位置的RE资源可以供四个不同的端口占用，由于现有技术中OCC数量固定为2，所以同一位置的RE资源只能供两个端口使用，本发明实施例通过设置OCC数量，使得同一位置的RE资源可以供更多端口使用，使得新增的导频端口也可以用于UE间的MUBF配对。
103、基站根据待分配端口的数量、OCC数量以及UE的数量，确定导频分配结果。
本发明实施例提供的导频分配的方法，基站确定需要进行MUBF配对的UE以及待分配端口，待分配端口可以包括新增的导频端口，然后根据待分配端口数量设置OCC数量，进而根据待分配端口的数量、OCC数量以及UE的数量，确定导频分配结果。与现有技术中当用户数超过4个时，采用空分复用的方式使不同用户使用相同信号而导致导频干扰大相比，本发明实施例通过设置OCC数量，使新增端口也可以占用用于导频分配的RE资 源，从而可分配给UE的导频端口数量增加，使得不同用户可以使用不同的导频端口，减小了UE之间的导频干扰。
在确定导频分配结果后，基站还需将导频分配结果告知UE，以使得UE进行信道估计，基于此，在本发明实施例提供的另一种实现方式中，基站中包括DCI(Downlink Control Information，下行控制信息)，DCI中包括用于携带NSCID的第一字段，以及用于携带至少两比特的待分配端口号信息的第二字段，NSCID为待分配端口的伪随机序列生成种子，如图2所示，在上述步骤103之后，还包括步骤104。
104、基站根据导频分配结果，将NSCID设置于DCI的第一字段中，将待分配端口号信息设置于DCI的第二字段中，并发送给UE。
其中，DCI的第二字段中用于发送端口号的比特位是根据待分配端口数量确定的，例如，当待分配端口数量为8时，则可采用3比特，用000,001,……,111分别代表8个待分配端口。
可以理解的是，当导频分配结果中为UE1分配端口11，且NSCID＝0时，则发送给UE1的DCI中，第一字段为0，第二字段为100，使得UE通过读取DCI确定被分配到的端口以及NSCID。
在本发明实施例提供的另一种实现方式中，如图3所示，上述步骤103、基站根据待分配端口的数量、OCC数量以及UE的数量，确定导频分配结果，具体可以实现为步骤301至步骤303。
301、基站根据OCC数量以及待分配端口数量为待分配端口分配RE资源。
其中，OCC数量为可占用同一位置的RE资源的待分配端口的数量。
需要说明的是，当待分配端口数量小于或等于OCC数量时，可为待分配端口分配同一位置的RE资源，用不同的OCC区分占用同一位置RE资源的待分配端口；当待分配端口数量大于OCC数量时，则为OCC数量的待分配端口分配第一位置的RE资源， 若此时剩余待分配端口数量小于或等于OCC数量，则为剩余待分配端口分配第二位置的RE资源。
进一步需要说明的是，为待分配端口分配RE资源之后，才能够将待分配端口分配给UE使用。
302、当UE数量小于或等于第一预设值时，基站确定导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值相同。
303、当UE数量大于第一预设值，且小于或等于第二预设值时，基站确定导频分配结果为每个待分配端口对应一个或两个UE。
当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值相同；
当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值不同。
以天线16T 16R为例，现有技术中，LTE下行TM8在进行MUBF配对时只能使用port7和port8这两个导频端口，OCC数量为2，则最多可支持port7NSCID＝0,port8NSCID＝0,port7NSCID＝1,port8NSCID＝1这四组导频。
而本发明实施例至少包括以下两种实现方式。
在第一种实现方式中，OCC数量为4，待分配端口数量为4。
其中，待分配端口包括原待分配端口port7和port8，以及新增待分配端口port11和port13。这四个待分配端口在一个时隙中占12个DRS中的RE，如图4所示，图4以TDD配比为1或2或6或7为例，阴影部分代表待分配端口占用的RE资源，port7、port8、port11和port13占用相同位置的RE资源，通过不同的OCC映射序列区分占用相同位置RE资源的待分配端口，每个待分配端口对应的OCC映射序列如表1所示。
表1
待分配端口号 OCC映射序列
7 [+1+1+1+1]
8 [+1-1+1-1]
11 [+1+1-1-1]
13 [+1-1-1+1]
当UE数量小于等于4时，基站确定导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值均为1或者均为0。
需要说明的是，由于待分配端口数量与UE数量相同，或者待分配端口数量大于UE数量，所以对UE进行MUBF配对时无需采用伪正交导频，以UE数量为4为例，可以确定两种导频分配结果，如表2和表3所示。
表2
Figure PCTCN2016099464-appb-000001
表3
Figure PCTCN2016099464-appb-000002
当UE数量大于4且小于或等于8时，基站确定导频分配结果为每个待分配端口对应一个或两个UE。
其中，当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；
当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
需要说明的是，由于待分配端口数量小于UE数量，所以对UE进行MUBF配对时需采用伪正交导频，以UE数量为8为例，可以确定两种导频分配结果，如表4和表5所示。
表4
Figure PCTCN2016099464-appb-000003
表5
Figure PCTCN2016099464-appb-000004
对于本发明实施例，采用第一种实现方式时，由于待分配端口数量增加，最多可支持MUBF4流的DRS正交导频分配，以及8流的DRS伪正交导频分配，无需进行空分复用，减小了UE间的导频干扰，且待分配端口在一个时隙内占用的RE数量仍为12，与现有技术相比没有占用额外的RE资源。
在第二种实现方式中，OCC数量为4，待分配端口数量为8。
其中，待分配端口包括原待分配端口port7和port8，以及新增待分配端口port11至port14。其中，每4个端口共用相同位置的一组RE资源，例如，如图5所示，port7、port8、port11和port13共用第一位置的RE资源，port9、port10、port12和port14共用第二位置的RE资源。通过不同的OCC映射序列区分占用相同位置RE资源的待分配端口，每个待分配端口对应的OCC映射序列 如表6所示。
表6
待分配端口号 OCC映射序列
7 [+1+1+1+1]
8 [+1-1+1-1]
9 [+1+1+1+1]
10 [+1-1+1-1]
11 [+1+1-1-1]
12 [-1-1+1+1]
13 [+1-1-1+1]
14 [-1+1+1-1]
当UE数量小于等于8时，基站确定导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值均为1或者均为0。
需要说明的是，由于待分配端口数量与UE数量相同，或者待分配端口数量大于UE数量，所以对UE进行MUBF配对时无需采用伪正交导频，以UE数量为8为例，可以确定两种导频分配结果，如表7和表8所示。
表7
Figure PCTCN2016099464-appb-000005
表8
Figure PCTCN2016099464-appb-000006
当UE数量大于8且小于或等于16时，基站确定导频分配结果为每个待分配端口对应一个或两个UE。
其中，当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；
当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
需要说明的是，由于待分配端口数量小于UE数量，所以对UE进行MUBF配对时需采用伪正交导频，以UE数量为16为例，可以确定两种导频分配结果，如表9和表10所示。
表9
Figure PCTCN2016099464-appb-000007
表10
Figure PCTCN2016099464-appb-000008
Figure PCTCN2016099464-appb-000009
对于本发明实施例，采用第二种实现方式时，由于待分配端口数量增加，最多可支持MUBF8流的DRS正交导频分配，以及16流的DRS伪正交导频分配，无需进行空分复用，减小了UE间的导频干扰。
为了减小UE(User Equipment，用户设备)之间的导频干扰，本发明实施例提供一种导频分配的装置，该装置应用于基站中，如图6所示，该装置包括：确定单元601，设置单元602。
确定单元601，用于确定需要进行MUBF配对的UE以及待分配端口，待分配端口包括原有的两个用于MUBF配对的导频端口以及至少一个新增的用于MUBF配对的导频端口，MUBF配对为对至少两个UE进行配对，使至少两个UE复用同一时频资源；
设置单元602，用于根据待分配端口的数量设置叠加正交码OCC数量；
确定单元601，还用于根据待分配端口的数量、OCC数量以及UE的数量，确定导频分配结果。
在本发明另一实施例中，基站中包括下行控制信息DCI，DCI中包括用于携带NSCID的第一字段，以及用于携带至少两比特的待分配端口号信息的第二字段，NSCID为待分配端口的伪随机序列生成种子；如图7所示，该装置还包括：发送单元603；
发送单元603，用于根据导频分配结果，将NSCID设置于DCI的第一字段中，将待分配端口号信息设置于DCI的第二字段中，并发送给UE。
在本发明另一实施例中，确定单元601，还用于根据OCC数量以及待分配端口数量为待分配端口分配资源元素RE资源，OCC数量为可占用同一位置的RE资源的待分配端口的数量；当UE数量小于或等于第一预设值时，确定导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值相同；当UE数量大于第一预设值，且小于或等于第二预设值时，确定导频分配结果为每个待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值相同；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值不同。
在本发明另一实施例中，OCC数量为4，待分配端口数量为4；
确定单元601，还用于根据OCC为待分配端口分配第一位置的RE资源；当UE数量小于等于4时，确定导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值均为1或者均为0；当UE数量大于4且小于或等于8时，确定导频分配结果为每个待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
在本发明另一实施例中，OCC数量为4，待分配端口数量为8；
确定单元601，还用于根据OCC为其中4个待分配端口分配第一位置的RE资源，为另外4个待分配端口分配第二位置的RE资源；当UE数量小于等于8时，确定导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值均为1或者均为0；当UE数量大于8且小于或等于16时，确定导频分配结果为每个待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取 值均为1或者均为0；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
本发明实施例提供的导频分配的装置，确定单元确定需要进行MUBF配对的UE以及待分配端口，待分配端口可以包括新增的导频端口，然后设置单元根据待分配端口数量设置OCC数量，进而确定单元根据待分配端口的数量、OCC数量以及UE的数量，确定导频分配结果。与现有技术中当用户数超过4个时，采用空分复用的方式使不同用户使用相同信号而导致导频干扰大相比，本发明实施例通过设置OCC数量，使新增端口也可以占用用于导频分配的RE资源，从而可分配给UE的导频端口数量增加，使得不同用户可以使用不同的导频端口，减小了UE之间的导频干扰。
本发明实施例还提供一种导频分配的装置，如图8所示，图8为图6描述的基站的硬件结构示意图。其中，该基站可包括存储器801、发送器802、处理器803和总线804，其中，存储器801、发送器802、处理器803通过总线804通信连接。
存储器801可以是只读存储器(Read Only Memory，ROM)，静态存储设备，动态存储设备或者随机存取存储器(Random Access Memory，RAM)。存储器801可以存储操作系统和其他应用程序。在通过软件或者固件来实现本发明实施例提供的技术方案时，用于实现本发明实施例提供的技术方案的程序代码保存在存储器801中，并由处理器803来执行。
发送器802用于装置与其他设备或通信网络(例如但不限于以太网，无线接入网(Radio Access Network，RAN)，无线局域网(Wireless Local Area Network，WLAN)等)之间的通信。
处理器803可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行 相关程序，以实现本发明实施例所提供的技术方案。
总线804可包括一通路，在装置各个部件(例如存储器801、发送器802和处理器803)之间传送信息。
应注意，尽管图8所示的硬件仅仅示出了存储器801、发送器802和处理器803以及总线804，但是在具体实现过程中，本领域的技术人员应当明白，该基站还包含实现正常运行所必须的其他器件。同时，根据具体需要，本领域的技术人员应当明白，还可包含实现其他功能的硬件器件。
具体的，图8所示的基站用于实现图6-图7实施例所示的装置时，该装置中的处理器803，与存储器801和发送器802耦合，用于控制程序指令的执行，具体用于确定需要进行MUBF配对的UE以及待分配端口，待分配端口包括原有的两个用于MUBF配对的导频端口以及至少一个新增的用于MUBF配对的导频端口，MUBF配对为对至少两个UE进行配对，使至少两个UE复用同一时频资源；根据待分配端口的数量设置叠加正交码OCC数量；根据待分配端口的数量、OCC数量以及UE的数量，确定导频分配结果。
存储器801，用于存储下行控制信息DCI，DCI中包括用于携带NSCID的第一字段，以及用于携带至少两比特的待分配端口号信息的第二字段，NSCID为待分配端口的伪随机序列生成种子。
发送器802，用于根据导频分配结果，将NSCID设置于DCI的第一字段中，将待分配端口号信息设置于DCI的第二字段中，并发送给UE。
处理器803，还用于根据OCC数量以及待分配端口数量为待分配端口分配资源元素RE资源，OCC数量为可占用同一位置的RE资源的待分配端口的数量；当UE数量小于或等于第一预设值时，确定导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值相同；当UE数量大于第一预设值，且小于或等于第二预设值时，确定导频分配结果为每个 待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值相同；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值不同。
当OCC数量为4，待分配端口数量为4时，处理器803，还用于根据OCC为待分配端口分配第一位置的RE资源；当UE数量小于等于4时，确定导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值均为1或者均为0；当UE数量大于4且小于或等于8时，确定导频分配结果为每个待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
当OCC数量为4，待分配端口数量为4时，处理器803，还用于根据OCC为其中4个待分配端口分配第一位置的RE资源，为另外4个待分配端口分配第二位置的RE资源；当UE数量小于等于8时，确定导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值均为1或者均为0；当UE数量大于8且小于或等于16时，确定导频分配结果为每个待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
本发明实施例提供的导频分配的装置，处理器确定需要进行MUBF配对的UE以及待分配端口，待分配端口可以包括新增的导频端口，然后根据待分配端口数量设置OCC数量，进而根据待分配端口的数量、OCC数量以及UE的数量，确定导频分配结果。与现有技术中当用户数超过4个时，采用空分复用的方式使不同用户使用相同信号而导致导频干扰大相比，本发明实施例通 过设置OCC数量，使新增端口也可以占用用于导频分配的RE资源，从而可分配给UE的导频端口数量增加，使得不同用户可以使用不同的导频端口，减小了UE之间的导频干扰。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到本发明可借助软件加必需的通用硬件的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在可读取的存储介质中，如计算机的软盘，硬盘或光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (10)

  1. 一种导频分配的方法，其特征在于，包括：
    基站确定需要进行MUBF配对的UE以及待分配端口，所述待分配端口包括原有的两个用于MUBF配对的导频端口以及至少一个新增的用于MUBF配对的导频端口；
    所述基站根据所述待分配端口的数量设置叠加正交码OCC数量；
    所述基站根据所述待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果。
  2. 根据权利要求1所述的导频分配的方法，其特征在于，所述基站中包括下行控制信息DCI，所述DCI中包括用于携带NSCID的第一字段，以及用于携带至少两比特的待分配端口号信息的第二字段，所述NSCID为待分配端口的伪随机序列生成种子；
    在所述基站根据所述待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果之后，所述方法还包括：
    所述基站根据所述导频分配结果，将NSCID设置于DCI的第一字段中，将待分配端口号信息设置于DCI的第二字段中，并发送给所述UE。
  3. 根据权利要求1或2所述的导频分配的方法，其特征在于，所述基站根据所述待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果，包括：
    所述基站根据所述OCC数量以及所述待分配端口数量为所述待分配端口分配资源元素RE资源，所述OCC数量为可占用同一位置的RE资源的待分配端口的数量；
    当所述UE数量小于或等于第一预设值时，所述基站确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值相同；
    当所述UE数量大于第一预设值，且小于或等于第二预设值时，所述基站确定所述导频分配结果为每个待分配端口对应一个 或两个UE；
    当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值相同；
    当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值不同。
  4. 根据权利要求3所述的导频分配的方法，其特征在于，所述OCC数量为4，所述待分配端口数量为4；所述基站根据所述待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果，包括：
    所述基站根据所述OCC为所述待分配端口分配第一位置的RE资源；
    当所述UE数量小于等于4时，所述基站确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个所述待分配端口对应的NSCID的取值均为1或者均为0；
    当所述UE数量大于4且小于或等于8时，所述基站确定所述导频分配结果为每个待分配端口对应一个或两个UE；
    当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；
    当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
  5. 根据权利要求3所述的导频分配的方法，其特征在于，所述OCC数量为4，所述待分配端口数量为8；所述基站根据所述新增待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果，包括：
    所述基站根据所述OCC为其中4个待分配端口分配第一位置的RE资源，为另外4个待分配端口分配第二位置的RE资源；
    当所述UE数量小于等于8时，所述基站确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个所述待分配端口对应的NSCID的取值均为1或者均为0；
    当所述UE数量大于8且小于或等于16时，所述基站确定所述导频分配结果为每个待分配端口对应一个或两个UE；
    当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；
    当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
  6. 一种导频分配的装置，其特征在于，所述装置应用于基站中，所述装置包括：
    确定单元，用于确定需要进行MUBF配对的UE以及待分配端口，所述待分配端口包括原有的两个用于MUBF配对的导频端口以及至少一个新增的用于MUBF配对的导频端口；
    设置单元，用于根据所述待分配端口的数量设置叠加正交码OCC数量；
    所述确定单元，还用于根据所述待分配端口的数量、所述OCC数量以及所述UE的数量，确定导频分配结果。
  7. 根据权利要求6所述的导频分配的装置，其特征在于，所述基站中包括下行控制信息DCI，所述DCI中包括用于携带NSCID的第一字段，以及用于携带至少两比特的待分配端口号信息的第二字段，所述NSCID为待分配端口的伪随机序列生成种子；所述装置还包括：发送单元；
    所述发送单元，用于根据所述导频分配结果，将NSCID设置于DCI的第一字段中，将待分配端口号信息设置于DCI的第二字段中，并发送给所述UE。
  8. 根据权利要求6或7所述的导频分配的装置，其特征在于，
    所述确定单元，还用于根据所述OCC数量以及所述待分配端口数量为所述待分配端口分配资源元素RE资源，所述OCC数量为可占用同一位置的RE资源的待分配端口的数量；当所述UE数量小于或等于第一预设值时，确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个待分配端口对应的NSCID的取值相 同；当所述UE数量大于第一预设值，且小于或等于第二预设值时，确定所述导频分配结果为每个待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值相同；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值不同。
  9. 根据权利要求8所述的导频分配的装置，其特征在于，所述OCC数量为4，所述待分配端口数量为4；
    所述确定单元，还用于根据所述OCC为所述待分配端口分配第一位置的RE资源；当所述UE数量小于等于4时，确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个所述待分配端口对应的NSCID的取值均为1或者均为0；当所述UE数量大于4且小于或等于8时，确定所述导频分配结果为每个待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
  10. 根据权利要求8所述的导频分配的装置，其特征在于，所述OCC数量为4，所述待分配端口数量为8；
    所述确定单元，还用于根据所述OCC为其中4个待分配端口分配第一位置的RE资源，为另外4个待分配端口分配第二位置的RE资源；当所述UE数量小于等于8时，确定所述导频分配结果为每个UE分别对应一个待分配端口，且每个所述待分配端口对应的NSCID的取值均为1或者均为0；当所述UE数量大于8且小于或等于16时，确定所述导频分配结果为每个待分配端口对应一个或两个UE；当存在每个待分配端口对应一个UE时，每个待分配端口的NSCID的取值均为1或者均为0；当存在每个待分配端口对应两个UE时，对应于两个UE的同一待分配端口的NSCID的取值分别为0和1。
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