WO2019062540A1 - 扩频序列选择方法、发射功率的调整方法和通信装置 - Google Patents

扩频序列选择方法、发射功率的调整方法和通信装置 Download PDF

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Publication number
WO2019062540A1
WO2019062540A1 PCT/CN2018/105027 CN2018105027W WO2019062540A1 WO 2019062540 A1 WO2019062540 A1 WO 2019062540A1 CN 2018105027 W CN2018105027 W CN 2018105027W WO 2019062540 A1 WO2019062540 A1 WO 2019062540A1
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Prior art keywords
mobile station
user
packet
power
received power
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PCT/CN2018/105027
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English (en)
French (fr)
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刘文佳
侯晓林
牟勤
刘柳
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株式会社Ntt都科摩
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Priority to CN201880062141.2A priority Critical patent/CN111295910B/zh
Priority to US16/650,820 priority patent/US11296746B2/en
Publication of WO2019062540A1 publication Critical patent/WO2019062540A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/11—Monitoring; Testing of transmitters for calibration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/0062—Avoidance of ingress interference, e.g. ham radio channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • 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
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss

Definitions

  • the present invention relates to the field of wireless communications, and in particular to a method for selecting a spread spectrum sequence, a method for adjusting transmit power, and a communication device.
  • Non-Orthogonal Multiple Access is a wireless access technology proposed in the LTE (Long Term Evolution) release 13 studied by the 3GPP (3rd Generation Partnership Project).
  • LTE Long Term Evolution
  • 3GPP 3rd Generation Partnership Project
  • the received information is decoded at the receiving end in a manner of serial interference cancellation (SIC).
  • SIC serial interference cancellation
  • the receiving end first decodes the information with the highest received power when demodulating the signal, and deletes the part of the information after decoding the information with the highest received power, and then decodes the information of the received power second. analogy. That is to say, the receiving end performs decoding based on the received power of the received information.
  • the power difference at the transmitting end is not equal to the power difference at the receiving end, and thus may result in The performance of the receiving end is poor.
  • a spreading sequence selection method comprising: obtaining received power of a plurality of user packets at a receiving end; determining a spreading sequence for a user packet in a set of spreading sequences according to obtaining received power; Grouping.
  • a method for adjusting transmit power is provided, which is applied to a mobile station, including: determining a user packet to which the mobile station belongs according to a reference signal received power of the mobile station; and grouping according to the determined user The received power at the receiving end adjusts the transmit power of the mobile station.
  • a communication apparatus comprising: an obtaining unit configured to obtain received power of a plurality of user packets at a receiving end; and a determining unit configured to determine in a set of spreading sequences according to obtaining received power Spreading sequence grouping for user grouping.
  • a communication apparatus comprising: a packet determining unit configured to determine a user packet to which the mobile station belongs according to a reference signal received power of the mobile station; and an adjustment unit configured to The received power of the determined user packet at the receiving end adjusts the transmit power of the mobile station.
  • FIG. 1 is a flow chart showing a method of selecting a spread spectrum sequence in accordance with one embodiment of the present invention.
  • FIG. 2 is a flow chart showing a method of adjusting transmission power according to an embodiment of the present invention.
  • FIG. 3 is a diagram showing the received power that each user packet is set to receive at the receiving end according to an example of the present invention.
  • FIG. 4 is a diagram showing transmission power that a mobile station in a corresponding packet should implement for the received power that should be achieved at the receiving end for each user packet shown in FIG. 3, according to an example of the present invention.
  • FIG. 5 is a block diagram showing a communication device in accordance with one embodiment of the present invention.
  • FIG. 6 is a block diagram showing a communication device in accordance with another embodiment of the present invention.
  • FIG. 7 is a diagram showing an example of a hardware configuration of a communication device according to an embodiment of the present invention.
  • a spread spectrum sequence selection method, a transmission power adjustment method, and a communication apparatus will be described below with reference to the accompanying drawings.
  • the same reference numerals are used to refer to the same elements. It is understood that the embodiments described herein are illustrative only and are not to be construed as limiting the scope of the invention.
  • the UEs described herein may include various types of user terminals, such as mobile terminals (or mobile stations) or fixed terminals, however, for convenience, the UE and the mobile station may sometimes be used interchangeably.
  • FIG. 1 is a flow chart showing a method of spreading sequence selection 100 in accordance with one embodiment of the present invention.
  • the spread spectrum sequence selection method 100 can be used in a communication device in a communication system that performs reception by a serial interference cancellation (SIC) method or other means, for example, a communication device in a NOMA system.
  • SIC serial interference cancellation
  • step S101 the received power of a plurality of user packets at the receiving end is obtained.
  • the mobile station is grouped by the received power of the information transmitted by the mobile station at the receiving end.
  • the same time and/or frequency resources can be used to transmit data from mobile stations of different packets.
  • the received power of the user packet at the receiving end may be a preset received power that the user packet should reach at the receiving end.
  • parameters such as the number of user packets, and/or the number of mobile stations included in each user packet may also be set in advance.
  • a spreading sequence packet for the user packet may be determined in the set of spreading sequences in accordance with obtaining the received power in step S102.
  • a set of spreading sequences can be set in advance.
  • the extended sequence set used to determine the extended sequence may also be referred to as a code base of the extended sequence matrix or the extended sequence.
  • the set of extended sequences used to determine the extended sequence may also be referred to as a codebook of the extended sequence or a Codebook or extended sequence pool or Sequence Pool.
  • the extended sequence determined from the set of extended sequences may also be referred to as a codeword or a Codeword or Spreading sequence.
  • a spreading sequence packet for a user packet may be determined in a set of spreading sequences according to a difference between received powers of respective user packets. Specifically, when the difference between the received powers of the respective user packets at the receiving end is greater than or equal to a predetermined value, in step S102, the interference caused to the users in a user group may be respectively according to each sequence in the set of spreading sequence.
  • a spreading sequence packet for the user packet is selected in the set of spreading sequences. That is to say, a specific user in a user group can be set to transmit using a specific spreading sequence in the set of spreading sequences, which can be performed according to each sequence except the specific spreading sequence in the set of spreading sequences.
  • the interference caused by the user in the specific user packet is selected from the set of spreading sequences for the spreading sequence for the user packet.
  • a spreading sequence with less interference to the particular user may be selected along with a spreading sequence used by the particular user as a spreading sequence in the spreading sequence packet of the user packet.
  • a correlation between the other sequences in the set of spreading sequences and the particular sequence can be obtained, and a less relevant sequence with the particular sequence is selected.
  • the particular sequence constitutes a spreading sequence packet for a user packet.
  • the receiving end can ignore the signal transmitted by the mobile station in the user packet having the smaller received power when performing decoding, and extract the user with the larger receiving power.
  • the signal sent by the mobile station in the packet Therefore, when selecting a spreading sequence, only the correlation between the spreading sequences included in the spreading sequence packet for one user group is considered to be low, and the inclusion of the spreading sequence packets from other user packets can be ignored. The effect of the spreading sequence.
  • the receiving end cannot ignore the received power when performing decoding.
  • a signal sent by a mobile station in a small user group Therefore, when selecting a spreading sequence, the influence of the spreading sequence contained in the spreading sequence packet for other user packets cannot be ignored.
  • step S102 when the difference between the received powers of the respective user packets at the receiving end is less than or equal to a predetermined value, in step S102, the sum of the interferences caused by the users in the user group according to the plurality of sequences in the set of spreading sequences, A spreading sequence in the spreading sequence packet for the user packet is selected from the set of spreading sequences. That is to say, a specific user in a user group can be set to transmit using a specific spreading sequence in the set of spreading sequences, which can be performed according to each sequence except the specific spreading sequence in the set of spreading sequences. At the time of transmission, the sum of the interference caused by the user in the particular user packet is selected from the set of spreading sequences for the spreading sequence for the user packet.
  • the sum of interferences of other sequences in the set of spreading sequences to the spreading sequence may be obtained for each spreading sequence in the set of spreading sequences, and the received power at the receiving end and the interference according to the user packet. And determining a spreading sequence in the spreading sequence packet of the user packet. For example, a spreading sequence in which the sum of interferences of other sequences to the spreading sequence is small can be assigned to a user packet having a large received power at the receiving end.
  • a specific user in a user group set here uses a specific spreading sequence in the set of spreading sequences, and may exclude a user group having a higher receiving power than the user packet from the set of spreading sequences.
  • the selected spreading sequence in the spreading sequence obtained after the spreading sequence. That is to say, preferably, in this example, the spreading sequence of the user packets is sequentially selected in accordance with the received power from large to small. For any user grouping, a selection may be made in a spreading sequence other than a spreading sequence packet of a user packet having a higher received power of the user packet in the spreading sequence.
  • the sum of interference caused by a plurality of sequences in a set of spreading sequences to users in a user packet preferably, only the spreading sequence packets other than the user packets having higher received power of the user packet may be determined.
  • the sum of the interference of the spreading sequence for a particular sequence preferably, only the spreading sequence packets other than the user packets having higher received power of the user packet may be determined.
  • the set of spreading sequences S can be as shown in the following formula 1:
  • each column in the array of Equation 1 is a spreading sequence
  • Dnor is a diagonal matrix
  • the correlation between the second to fifth spreading sequences and the first spreading sequence is 0.5000, 0.1291, 0.5701, 0.2500, and 0.2887, respectively, wherein the third spreading sequence and the first spreading sequence are The correlation between the two is the smallest, being 0.1291. Therefore, the first spreading sequence and the third spreading sequence are selected as the spreading sequence in the first spreading sequence packet. Furthermore, the correlation between the second spreading sequence and the sixth spreading sequence is minimal, being 0.1291. Therefore, the second spreading sequence and the sixth spreading sequence are selected as the spreading sequence in the second spreading sequence packet. Furthermore, the correlation between the fourth spreading sequence and the fifth spreading sequence is minimal, being 0.1118. Therefore, the fourth spreading sequence and the fifth spreading sequence are selected as the spreading sequence in the third spreading sequence packet.
  • One of the first to third spreading sequence packets can be assigned to each user packet.
  • the difference between the received powers of the individual user packets is not sufficiently large, as described above, for each of the spreading sequences in the set of spreading sequences, other sequences in the set of spreading sequences may be obtained for the spreading sequence, respectively.
  • the sum of the interferences, and a spreading sequence in which the sum of the interferences of the other sequences to the spreading sequence is small can be allocated to the user packets having a large received power at the receiving end. Further, as described above, when determining a spreading sequence packet of a user packet having a small received power, a spreading sequence that has been selected as a user packet for receiving a large power can be excluded from the set of spreading sequences.
  • the sum of the interferences of the other sequences subjected to the first spreading sequence is the sum of the elements other than the first element 1.0000 in the first line of the formula of Equation 2.
  • the sum of the interferences of the other sequences received by the fifth spreading sequence and the sixth spreading sequence is small. It is assumed that the received power of the first user packet in the three user packets is large at the receiving end, the receiving power of the second user packet at the receiving end is second, and the receiving power of the third user packet at the receiving end is small.
  • a spreading sequence packet including a spreading sequence having a smaller sum of interferences of other sequences received that is, determining to include the fifth spreading sequence And a spreading sequence grouping of the sixth spreading sequence.
  • the fifth spreading sequence and the sixth spreading sequence are deleted from the set of spreading sequences, and according to the above formula 2, in the first to fourth spreading sequences, the third spreading sequence and the fourth spreading sequence
  • the spreading sequence packet including the third spreading sequence and the fourth spreading sequence can be determined for the second user packet that is secondarily received at the receiving end.
  • a spreading sequence grouping including the first spreading sequence and the second spreading sequence is determined for the third user packet having a small received power at the receiving end.
  • the user group having a lower received power at the receiving end may include more mobile stations than the number of mobile stations included in the user group having higher receiving power at the receiving end, and accordingly, A spreading sequence packet for a user packet of a lower received power may include a spreading sequence that is larger than a spreading sequence packet for receiving a higher power user packet.
  • the mobile station is grouped by the received power at the receiving end, so that when the received information is decoded at the receiving end, the power difference between the user packets can be utilized more effectively, Thereby improving the reception performance.
  • the transmission power of the mobile station can also be adjusted to control the received power of the information transmitted by the mobile station at the receiving end, thereby further improving the performance of the receiver.
  • the transmission power adjustment method 200 can be used for a communication device in a communication system that receives by means of serial interference cancellation (SIC), maximum likelihood, information transfer algorithm (MPA), etc., for example, a NOMA system Communication device in the middle.
  • SIC serial interference cancellation
  • MPA information transfer algorithm
  • step S201 the user group to which the mobile station belongs is determined according to the reference signal received power of the mobile station.
  • the path loss of the mobile station can be determined based on the reference signal received power (RSRP) of the mobile station. Then, the user group to which the mobile station belongs is determined based on the path loss.
  • RSRP reference signal received power
  • the reception power at the receiving end of each user packet may be disregarded, and the reception power at the receiving end of each user packet may be considered.
  • the received power of the user packet at the receiving end may be a preset received power that the information transmitted by the mobile station in the user packet should reach at the receiving end.
  • the mobile station determines that the received power at the receiving end of a particular one of the plurality of user packets can be reached according to the RSRP, in step S201, it may be determined that the mobile station belongs to the specific user packet.
  • step S201 when the mobile station determines that the received power at the receiving end of the two or more user packets of the plurality of user packets can be reached according to the RSRP, in step S201, one of the two or more user groups may be selected.
  • the user grouping belongs to the particular user group as a mobile station.
  • the transmit power of the mobile station is adjusted according to the determined received power of the user packet at the receiving end.
  • the method shown in FIG. 2 can be used for a base station, that is, a base station controls transmission power of respective mobile stations connected to the base station.
  • the base station may receive power according to a reference signal of a UE, or determine a user group to which the UE belongs according to a reference signal received power of a UE and received power of other mobile stations connected to the base station, and according to the determined
  • the user packet generates power adjustment information for indicating adjustment of the transmission power of the mobile station.
  • the mobile station receives the power adjustment information from the base station and adjusts its transmit power according to the received power adjustment information.
  • the method shown in Fig. 2 can be used for a mobile station, i.e., the mobile station controls its own transmit power according to its reference signal received power (RSRP).
  • RSRP reference signal received power
  • the UE may determine a user packet to which the UE belongs according to its reference signal received power, and adjust its transmit power according to the determined user packet.
  • the transmit power of the mobile station may be performed by one or more parameters such as packet adjustment power, mobile station adjustment power, path loss compensation factor, correction factor, power adjustment information, and the like. Adjustment.
  • Fig. 3 is a diagram showing the received power that each user packet set at the receiving end is set in advance according to an example of the present invention.
  • PL1-PL3 are the maximum path loss of the user group 1-3
  • the solid line segments corresponding to Pr1-Pr3 are the received power of the user group 1-3.
  • Pmax is the maximum transmission power.
  • 4 is a diagram showing transmission power that a mobile station in a corresponding packet should implement for the received power that should be achieved at the receiving end for each user packet shown in FIG. 3, according to an example of the present invention.
  • Pt1-Pt3 are corresponding solid line segments for the transmission power that the user group 1-3 should have at different path loss in order to reach the received power Pr1-Pr3.
  • the packet adjustment power P 0_Group can be determined according to the determined user group. Then, the transmit power of the mobile station is adjusted according to the packet adjustment power P 0_Group .
  • the packet adjustment power P 0_Group for a particular packet n can be determined by Equation 3 below :
  • P max is the maximum transmission power and P n is the received power of the packet n at the receiving end.
  • the value range of P 0_Group can be set to [-126, 24] dBm.
  • the value range of P 0_Group can be set to [-126, 24]-(n-1)*P gap dBm, where P gap is the power difference between adjacent user packets.
  • the transmit power of the mobile station can be further adjusted by the mobile station adjusting the power based on the path loss of the mobile station itself.
  • the method illustrated in FIG. 2 may include determining a mobile station to adjust power based on a path loss of the mobile station, and then adjusting a transmit power of the mobile station based on the mobile station adjusting power.
  • the mobile station adjustment power P 0_UE can be determined by Equation 4 below :
  • ⁇ is the path loss compensation factor
  • 0 ⁇ ⁇ ⁇ 1 PL is the path loss of the mobile station.
  • the transmission power of the mobile station may be adjusted according to a path loss compensation factor in step S202.
  • the path loss compensation factor of the mobile station may be determined according to the received power at the receiving end and the path loss of the mobile station of the user group to which the mobile station belongs.
  • the transmit power of the mobile station is then adjusted according to the path loss compensation factor.
  • the path loss compensation factor ⁇ can be determined by Equation 5 below:
  • the nominal power can be preset.
  • the path loss compensation factor ⁇ can be determined based on a given nominal power and path loss adjustment of the UE. Further, according to an example of the present invention, ⁇ may continuously vary within the range of [0, 1]. Alternatively, the set of values of ⁇ may also be set in advance. In step S202, a selection may be made according to the determined value set of ⁇ (for example, by Equation 5) to obtain the final value of ⁇ .
  • the same set of values of ⁇ can be set for all users, for example, ⁇ 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 ⁇ .
  • different sets of values of a can also be set for different user groups.
  • the value set of ⁇ can be set ⁇ 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 ⁇
  • the value set of ⁇ can be set ⁇ 0, 0.1, 0.2, 0.3 , 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 ⁇ , for the remaining users, set the set of values of ⁇ ⁇ 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 ⁇ .
  • the method illustrated in FIG. 2 may further include obtaining a received power at a receiving end of a user packet adjacent to a user packet to which the mobile station belongs.
  • the transmit power of the mobile station may be adjusted according to the determined received power of the user packet at the receiving end and the path loss of the mobile station. For example, for a given nominal power, path loss compensation factor, a correction factor can be determined based on the determined received power of the user packet at the receiving end, and the path loss of the mobile station to adjust the transmit power of the mobile station.
  • the base station may also transmit power adjustment information to the UE according to the condition of the UE to further adjust its transmission power.
  • the method shown in FIG. 2 may further include receiving power adjustment information transmitted by the base station. And adjusting the transmit power of the mobile station according to the power adjustment information.
  • the transmit power of the mobile station is adjusted according to the received power of the user group at the receiving end, thereby making it more effective when the receiving end decodes the received information.
  • the power difference between user packets is utilized to improve reception performance.
  • FIG. 5 is a block diagram showing a communication device 500 in accordance with one embodiment of the present invention.
  • the communication device 500 includes an acquisition unit 510 and a determination unit 520.
  • the communication device 500 may include other components in addition to these two units, however, since these components are not related to the content of the embodiment of the present invention, the illustration and description thereof are omitted herein. Further, since the specific details of the following operations performed by the communication apparatus 500 according to the embodiment of the present invention are the same as those described above with reference to FIG. 1 and the formulas 1 and 2, the repetition of the same details is omitted here to avoid repetition. description.
  • the acquisition unit 510 obtains the received power of a plurality of user packets at the receiving end.
  • the mobile station is grouped by the received power of the information transmitted by the mobile station at the receiving end.
  • the same time and/or frequency resources can be used to transmit data from mobile stations of different packets.
  • the received power of the user packet at the receiving end may be a preset received power that the user packet should reach at the receiving end.
  • parameters such as the number of user packets, and/or the number of mobile stations included in each user packet may also be set in advance.
  • the determining unit 520 can determine a spreading sequence packet for the user packet in the set of spreading sequences based on the received received power.
  • a set of spreading sequences can be set in advance.
  • the extended sequence set used to determine the extended sequence may also be referred to as a code base of the extended sequence matrix or the extended sequence.
  • the set of extended sequences used to determine the extended sequence may also be referred to as a codebook of the extended sequence or a Codebook or extended sequence pool or Sequence Pool.
  • the extended sequence determined from the set of extended sequences may also be referred to as a codeword or a Codeword or Spreading sequence.
  • the determining unit 520 may determine a spreading sequence packet for the user packet in the set of spreading sequences based on the difference between the received powers of the respective user packets. Specifically, when the difference between the received powers of the respective user groups at the receiving end is greater than or equal to a predetermined value, the determining unit 520 may respectively perform interference on the users in a user group according to each sequence in the set of spreading sequences, from spreading. A spreading sequence packet for the user packet is selected in the sequence set. That is to say, a specific user in a user group can be set to transmit using a specific spreading sequence in the set of spreading sequences, which can be performed according to each sequence except the specific spreading sequence in the set of spreading sequences.
  • the interference caused by the user in the specific user packet is selected from the set of spreading sequences for the spreading sequence for the user packet.
  • a spreading sequence with less interference to the particular user may be selected along with a spreading sequence used by the particular user as a spreading sequence in the spreading sequence packet of the user packet.
  • a correlation between the other sequences in the set of spreading sequences and the particular sequence can be obtained, and a less relevant sequence with the particular sequence is selected.
  • the particular sequence constitutes a spreading sequence packet for a user packet.
  • the receiving end can ignore the signal transmitted by the mobile station in the user packet with less received power when performing decoding, and extract the received power with a large amount.
  • the signal sent by the mobile station in the user packet Therefore, when selecting a spreading sequence, only the correlation between the spreading sequences included in the spreading sequence packet for one user group is considered to be low, and the inclusion of the spreading sequence packets from other user packets can be ignored. The effect of the spreading sequence.
  • the receiving end cannot ignore the received power when performing decoding.
  • a signal sent by a mobile station in a small user group Therefore, when selecting a spreading sequence, the influence of the spreading sequence contained in the spreading sequence packet for other user packets cannot be ignored.
  • the determining unit 520 may extract the interference caused by the users in the user group according to the plurality of sequences in the set of the spreading sequence.
  • a spreading sequence in the set of spreading sequences for the user packet is selected in the set of spreading sequences. That is to say, a specific user in a user group can be set to transmit using a specific spreading sequence in the set of spreading sequences, which can be performed according to each sequence except the specific spreading sequence in the set of spreading sequences.
  • the sum of the interference caused by the user in the particular user packet is selected from the set of spreading sequences for the spreading sequence for the user packet.
  • the sum of interferences of other sequences in the set of spreading sequences to the spreading sequence may be obtained for each spreading sequence in the set of spreading sequences, and the received power at the receiving end and the interference according to the user packet. And determining a spreading sequence in the spreading sequence packet of the user packet. For example, a spreading sequence in which the sum of interferences of other sequences to the spreading sequence is small can be assigned to a user packet having a large received power at the receiving end.
  • a specific user in a user group set here uses a specific spreading sequence in the set of spreading sequences, and may exclude a user group having a higher receiving power than the user packet from the set of spreading sequences.
  • the selected spreading sequence in the spreading sequence obtained after the spreading sequence. That is to say, preferably, in this example, the spreading sequence of the user packets is sequentially selected in accordance with the received power from large to small. For any user grouping, a selection may be made in a spreading sequence other than a spreading sequence packet of a user packet having a higher received power of the user packet in the spreading sequence.
  • the sum of interference caused by a plurality of sequences in a set of spreading sequences to users in a user packet preferably, only the spreading sequence packets other than the user packets having higher received power of the user packet may be determined.
  • the sum of the interference of the spreading sequence for a particular sequence preferably, only the spreading sequence packets other than the user packets having higher received power of the user packet may be determined.
  • the number of mobile stations included in each user packet is the same, and the number of spreading sequences included in each spreading sequence packet is the same.
  • the user group having a lower received power at the receiving end may include more mobile stations than the number of mobile stations included in the user group having higher receiving power at the receiving end, and accordingly, A spreading sequence packet for a user packet of a lower received power may include a spreading sequence that is larger than a spreading sequence packet for receiving a higher power user packet.
  • the mobile station is grouped by the received power at the receiving end, so that when the received information is decoded at the receiving end, the power difference between the user packets can be utilized more effectively, Thereby improving the reception performance.
  • the transmission power of the mobile station can also be adjusted to control the received power of the information transmitted by the mobile station at the receiving end, thereby further improving the performance of the receiver.
  • FIG. 6 is a block diagram showing a communication device 600 in accordance with another embodiment of the present invention.
  • the communication device 600 includes a packet determining unit 610 and an adjusting unit 620.
  • the communication device 600 may include other components in addition to these two units, however, since these components are not related to the content of the embodiment of the present invention, the illustration and description thereof are omitted herein. Further, since the specific details of the following operations performed by the communication apparatus 600 according to the embodiment of the present invention are the same as those described above with reference to FIGS. 2 to 4 and Equations 3-6, the same details are omitted here to avoid repetition. Repeated description.
  • the packet determining unit 610 can determine the user packet to which the mobile station belongs according to the reference signal received power of the mobile station.
  • the path loss of the mobile station can be determined based on the reference signal received power (RSRP) of the mobile station. Then, the user group to which the mobile station belongs is determined according to the path loss.
  • RSRP reference signal received power
  • the packet determining unit 610 may not consider the received power of the respective user packets at the receiving end, and may also consider the received power of the respective user packets at the receiving end.
  • the received power of the user packet at the receiving end may be a preset received power that the information transmitted by the mobile station in the user packet should reach at the receiving end. For example, when the mobile station determines that the received power at the receiving end of a particular one of the plurality of user packets can be reached according to the RSRP, the packet determining unit 610 can determine that the mobile station belongs to the particular user packet.
  • the packet determining unit 610 can select one user from the two or more user packets.
  • the packet belongs to the particular user group as a mobile station.
  • the adjusting unit 620 can adjust the transmit power of the mobile station according to the determined received power of the user group at the receiving end.
  • the method shown in FIG. 2 can be used for a base station, that is, a base station controls transmission power of respective mobile stations connected to the base station.
  • the base station may receive power according to a reference signal of a UE, or determine a user group to which the UE belongs according to a reference signal received power of a UE and received power of other mobile stations connected to the base station, and according to the determined
  • the user packet generates power adjustment information for indicating adjustment of the transmission power of the mobile station.
  • the mobile station receives the power adjustment information from the base station and adjusts its transmit power according to the received power adjustment information.
  • the method shown in Fig. 2 can be used for a mobile station, i.e., the mobile station controls its own transmit power according to its reference signal received power (RSRP).
  • RSRP reference signal received power
  • the UE may determine a user packet to which the UE belongs according to its reference signal received power, and adjust its transmit power according to the determined user packet.
  • the adjustment unit 620 can adjust the transmit power of the mobile station by one or more parameters such as packet adjustment power, mobile station adjustment power, path loss compensation factor, correction factor, power adjustment information, and the like. For example, to achieve the received power that each user packet should reach at the receiving end, adjustment unit 620 can determine the packet adjustment power for each user packet to adjust the transmit power of the mobile station in the user packet.
  • the example of determining the packet adjustment power P 0_Group for a specific packet n has been described above with reference to FIGS. 3-4 and 3, and therefore will not be described herein.
  • the transmit power of the mobile station can be further adjusted by the mobile station adjusting the power based on the path loss of the mobile station itself.
  • the adjusting unit 620 may determine the mobile station to adjust the power according to the path loss of the mobile station, and then adjust the transmit power of the mobile station according to the mobile station adjusting power.
  • the mobile station adjustment power P 0 — UE can be determined by Equation 4 above.
  • the adjustment unit 620 can adjust the transmit power of the mobile station according to a path loss compensation factor.
  • the adjusting unit 620 may determine the path loss compensation factor of the mobile station according to the received power at the receiving end and the path loss of the mobile station of the user group to which the mobile station belongs. The transmit power of the mobile station is then adjusted according to the path loss compensation factor.
  • the path loss compensation factor ⁇ can be determined by the above formula 5.
  • ⁇ may continuously vary within the range of [0, 1].
  • the set of values of ⁇ may also be set in advance.
  • the adjusting unit 620 can select according to the determined set of values of ⁇ (for example, by Equation 5) to obtain the final value of ⁇ .
  • the same set of values of a can be set for all users, for example, ⁇ 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 ⁇ .
  • different sets of values of a can also be set for different user groups.
  • the value set of ⁇ can be set ⁇ 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 ⁇
  • the value set of ⁇ can be set ⁇ 0, 0.1, 0.2, 0.3 , 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 ⁇ , for the remaining users, set the set of values of ⁇ ⁇ 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 ⁇ .
  • the communication device 600 may further include an acquisition unit.
  • the obtaining unit may obtain the received power at the receiving end of the user packet adjacent to the user packet to which the mobile station belongs.
  • the adjusting unit 620 can adjust the transmit power of the mobile station according to the determined received power of the user packet at the receiving end and the path loss of the mobile station. For example, for a given nominal power, path loss compensation factor, a correction factor can be determined based on the determined received power of the user packet at the receiving end, and the path loss of the mobile station to adjust the transmit power of the mobile station.
  • the base station may also transmit power adjustment information to the UE according to the condition of the UE to further adjust its transmission power.
  • the communication device is a mobile station, it may further include a receiving unit to receive power adjustment information transmitted by the base station.
  • the adjusting unit 620 can adjust the transmit power of the mobile station according to the power adjustment information.
  • the transmission power of the mobile station is adjusted according to the received power of the user group at the receiving end, thereby performing serial interference cancellation (SIC), maximum likelihood, and information transmission at the receiving end.
  • SIC serial interference cancellation
  • MPA algorithm
  • the power difference between the user packets can be utilized more effectively, thereby improving the reception performance.
  • the radio base station, the user terminal, and the like in one embodiment of the present invention can function as a computer that performs processing of the radio communication method of the present invention.
  • FIG. 7 is a diagram showing an example of a hardware configuration of a communication device according to an embodiment of the present invention. Any of the above-described communication devices 500, 600 may be configured as a computer device that physically includes a processor 710, a memory 720, a memory 730, a communication device 740, an input device 750, an output device 760, a bus 770, and the like.
  • any of the above-described communication devices 500, 600 may include one or more of the devices shown in the figure, or may not include some devices.
  • processor 710 is only illustrated as one, but may be multiple processors.
  • the processing may be performed by one processor, or may be performed by one or more processors simultaneously, sequentially, or by other methods.
  • the processor 710 can be installed by more than one chip.
  • Each of the above-described communication devices 500 and 600 is realized, for example, by reading a predetermined software (program) into hardware such as the processor 710 or the memory 720, thereby causing the processor 710 to perform an operation.
  • the communication by the communication device 740 is controlled, and the reading and/or writing of data in the memory 720 and the memory 730 is controlled.
  • the processor 710 causes the operating system to operate to control the computer as a whole.
  • the processor 710 may be constituted by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the above-mentioned obtaining unit 510, determining unit 520, group determining unit 610, adjusting unit 620, and the like may be implemented by the processor 710.
  • the processor 710 reads out programs (program codes), software modules, data, and the like from the memory 730 and/or the communication device 740 to the memory 720, and executes various processes in accordance therewith.
  • programs program codes
  • software modules software modules
  • data data, and the like
  • the program a program for causing a computer to execute at least a part of the operations described in the above embodiments can be employed.
  • the memory 720 is a computer readable recording medium, and may be, for example, a read only memory (ROM), an EEPROM (Erasable Programmable ROM), an electrically programmable read only memory (EEPROM), or an electrically programmable read only memory (EEPROM). At least one of a random access memory (RAM) and other suitable storage medium is used.
  • the memory 720 can also be referred to as a register, a cache, a main memory (primary storage device), or the like.
  • the memory 720 can store an executable program (program code), a software module, and the like for implementing the wireless communication method according to the embodiment of the present invention.
  • the memory 730 is a computer readable recording medium, and may be, for example, a flexible disk, a soft (registered trademark) disk (floppy disk), a magneto-optical disk (for example, a CD-ROM (Compact Disc ROM), etc.). Digital Versatile Disc, Blu-ray (registered trademark) disc, removable disk, hard drive, smart card, flash device (eg card, stick, key driver), magnetic stripe, database At least one of a server, a server, and other suitable storage medium. Memory 730 may also be referred to as an auxiliary storage device.
  • the communication device 740 is hardware (transmission and reception device) for performing communication between computers through a wired and/or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, and the like, for example.
  • the communication device 740 may include a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to implement, for example, Frequency Division Duplex (FDD) and/or Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the above-described transmitting unit 710, receiving unit 810, and the like can be implemented by the communication device 740.
  • the input device 750 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
  • the output device 760 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that performs an output to the outside.
  • the input device 750 and the output device 760 may also be an integrated structure (for example, a touch panel).
  • each device such as the processor 710, the memory 720, and the like are connected by a bus 770 for communicating information.
  • the bus 770 may be composed of a single bus or a different bus between devices.
  • any one of the communication devices 500 and 600 may include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a programmable logic device (PLD).
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • Hardware such as Programmable Logic Device, Field Programmable Gate Array (FPGA), etc., can realize some or all of each functional block by this hardware.
  • processor 710 can be installed by at least one of these hardware.
  • the channel and/or symbol can also be a signal (signaling).
  • the signal can also be a message.
  • the reference signal may also be simply referred to as an RS (Reference Signal), and may also be referred to as a pilot (Pilot), a pilot signal, or the like according to applicable standards.
  • a component carrier may also be referred to as a cell, a frequency carrier, a carrier frequency, or the like.
  • the radio frame may be composed of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe.
  • a subframe may be composed of one or more time slots in the time domain.
  • the subframe may be a fixed length of time (eg, 1 ms) that is independent of the numerology.
  • the time slot may have one or more symbols in the time domain (Orthogonal Frequency Division Multiplexing (OFDM), Single Carrier Frequency Division Multiple Access (SC-FDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA) Symbols, etc.).
  • the time slot can also be a time unit based on parameter configuration.
  • the time slot may also include a plurality of minislots. Each minislot may be composed of one or more symbols in the time domain.
  • a minislot can also be referred to as a subslot.
  • Radio frames, subframes, time slots, mini-slots, and symbols all represent time units when signals are transmitted. Radio frames, subframes, time slots, mini-slots, and symbols can also use other names that correspond to each other.
  • one subframe may be referred to as a Transmission Time Interval (TTI), and a plurality of consecutive subframes may also be referred to as a TTI.
  • TTI Transmission Time Interval
  • One slot or one minislot may also be referred to as a TTI. That is to say, the subframe and/or the TTI may be a subframe (1 ms) in the existing LTE, or may be a period shorter than 1 ms (for example, 1 to 13 symbols), or may be a period longer than 1 ms.
  • a unit indicating a TTI may also be referred to as a slot, a minislot, or the like instead of a subframe.
  • TTI refers to, for example, a minimum time unit scheduled in wireless communication.
  • the radio base station performs scheduling for all user terminals to allocate radio resources (bandwidth, transmission power, etc. usable in each user terminal) in units of TTIs.
  • the definition of TTI is not limited to this.
  • the TTI may be a channel-coded data packet (transport block), a code block, and/or a codeword transmission time unit, or may be a processing unit such as scheduling, link adaptation, or the like.
  • the time interval e.g., the number of symbols
  • actually mapped to the transport block, code block, and/or codeword may also be shorter than the TTI.
  • TTI time slot or one mini time slot
  • more than one TTI ie, more than one time slot or more than one micro time slot
  • the number of slots (the number of microslots) constituting the minimum time unit of the scheduling can be controlled.
  • a TTI having a length of 1 ms may also be referred to as a regular TTI (TTI in LTE Rel. 8-12), a standard TTI, a long TTI, a regular subframe, a standard subframe, or a long subframe.
  • TTI shorter than a conventional TTI may also be referred to as a compressed TTI, a short TTI, a partial TTI (partial or fractional TTI), a compressed subframe, a short subframe, a minislot, or a subslot.
  • a long TTI (eg, a regular TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
  • a short TTI eg, a compressed TTI, etc.
  • TTI length of the TTI may be replaced with 1 ms.
  • a resource block is a resource allocation unit of a time domain and a frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain.
  • the RB may include one or more symbols in the time domain, and may also be one slot, one minislot, one subframe, or one TTI.
  • a TTI and a subframe may each be composed of one or more resource blocks.
  • one or more RBs may also be referred to as a physical resource block (PRB, Physical RB), a sub-carrier group (SCG), a resource element group (REG, a resource element group), a PRG pair, an RB pair, and the like. .
  • the resource block may also be composed of one or more resource elements (REs, Resource Elements).
  • REs resource elements
  • Resource Elements For example, one RE can be a subcarrier and a symbol of a radio resource area.
  • radio frames, subframes, time slots, mini-slots, symbols, and the like are merely examples.
  • the number of subframes included in the radio frame, the number of slots of each subframe or radio frame, the number of microslots included in the slot, the number of symbols and RBs included in the slot or minislot, and the number of RBs included in the RB The number of subcarriers, the number of symbols in the TTI, the symbol length, and the length of the cyclic prefix (CP, Cyclic Prefix) can be variously changed.
  • the information, parameters, and the like described in the present specification may be expressed by absolute values, may be represented by relative values with predetermined values, or may be represented by other corresponding information.
  • wireless resources can be indicated by a specified index.
  • the formula or the like using these parameters may be different from those explicitly disclosed in the present specification.
  • the information, signals, and the like described in this specification can be expressed using any of a variety of different techniques.
  • data, commands, instructions, information, signals, bits, symbols, chips, etc. which may be mentioned in all of the above description, may pass voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of them. Combined to represent.
  • information, signals, and the like may be output from the upper layer to the lower layer, and/or from the lower layer to the upper layer.
  • Information, signals, etc. can be input or output via a plurality of network nodes.
  • Information or signals input or output can be stored in a specific place (such as memory) or managed by a management table. Information or signals input or output may be overwritten, updated or supplemented. The output information, signals, etc. can be deleted. The input information, signals, etc. can be sent to other devices.
  • the notification of the information is not limited to the mode/embodiment described in the specification, and may be performed by other methods.
  • the notification of the information may be through physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and upper layer signaling (for example, radio resource control).
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Media Access Control
  • the physical layer signaling may be referred to as L1/L2 (Layer 1/Layer 2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like.
  • the RRC signaling may also be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.
  • the MAC signaling can be notified, for example, by a MAC Control Unit (MAC CE).
  • MAC CE MAC Control Unit
  • the notification of the predetermined information is not limited to being explicitly performed, and may be performed implicitly (for example, by not notifying the predetermined information or by notifying the other information).
  • the determination can be performed by a value (0 or 1) represented by 1 bit, or by a true or false value (boolean value) represented by true (true) or false (false), and can also be compared by numerical values ( For example, comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, should be interpreted broadly to mean commands, command sets, code, code segments, program code, programs, sub- Programs, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, steps, functions, and the like.
  • software, commands, information, and the like may be transmitted or received via a transmission medium.
  • a transmission medium For example, when using wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) from a website, server, or other remote source
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • radio base station (BS, Base Station)
  • radio base station radio base station
  • eNB radio base station
  • gNB gNodeB
  • cell a cell
  • cell group a carrier
  • component carrier a fixed station
  • NodeB a NodeB
  • eNodeB eNodeB
  • access point a transmission point
  • reception point a reception point
  • femto cell a small cell
  • a wireless base station can accommodate one or more (eg, three) cells (also referred to as sectors). When a wireless base station accommodates multiple cells, the entire coverage area of the wireless base station can be divided into multiple smaller areas, and each smaller area can also pass through a wireless base station subsystem (for example, a small indoor wireless base station (radio-radio) Head (RRH, Remote Radio Head))) to provide communication services.
  • a wireless base station subsystem for example, a small indoor wireless base station (radio-radio) Head (RRH, Remote Radio Head)
  • RRH small indoor wireless base station
  • the term "cell” or “sector” refers to a part or the whole of the coverage area of a radio base station and/or a radio base station subsystem that performs communication services in the coverage.
  • the radio base station is sometimes referred to by a fixed station, a NodeB, an eNodeB (eNB), an access point, a transmission point, a reception point, a femto cell, a small cell, and the like.
  • Mobile stations are also sometimes used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless Terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms are used.
  • the wireless base station in this specification can also be replaced with a user terminal.
  • each mode/embodiment of the present invention can be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between a plurality of user-to-device (D2D) devices.
  • the user terminal in this specification can also be replaced with a wireless base station.
  • a specific operation performed by the radio base station may be performed by an upper node depending on the situation.
  • various actions performed for communication with the terminal may pass through the wireless base station and one other than the wireless base station.
  • the above network node may be considered, for example, a Mobility Management Entity (MME), a Serving-Gateway (S-GW, etc.), but not limited thereto), or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • LTE-B Long-Term Evolution
  • LTE-Beyond Long-Term Evolution
  • Super 3rd generation mobile communication system SUPER 3G
  • IMT-Advanced advanced international mobile communication
  • 4th generation mobile communication system (4G, 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • future radio access FAA
  • new radio access technology New-RAT, Radio Access Technology
  • NR New Radio Access Technology
  • NX new radio access
  • FX Next Generation Wireless Access
  • GSM Registered trademark
  • GSM Global System for Mobile Communications
  • CDMA2000 Code Division Multiple Access 2000
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • IEEE 802.20 Ultra Wideband
  • any reference to a unit using the names "first”, “second”, etc., as used in this specification, does not fully limit the number or order of the units. These names can be used in this specification as a convenient method of distinguishing between two or more units. Thus, reference to a first element and a second element does not mean that only two elements may be employed or that the first element must prevail in the form of the second unit.
  • determination used in the present specification sometimes includes various actions. For example, regarding “judgment (determination)", calculation, calculation, processing, deriving, investigating, looking up (eg, table, database, or other) may be performed. Search in the data structure, ascertaining, etc. are considered to be “judgment (determination)”. Further, regarding “judgment (determination)”, reception (for example, receiving information), transmission (for example, transmission of information), input (input), output (output), and access (for example) may also be performed (for example, Accessing data in memory, etc. is considered to be “judgment (determination)”.
  • judgment (determination) it is also possible to consider “resolving”, “selecting”, selecting (choosing), establishing (comparing), comparing (comparing), etc. as “judging (determining)”. That is to say, regarding "judgment (determination)", several actions can be regarded as performing "judgment (determination)".
  • connection means any direct or indirect connection or combination between two or more units, This includes the case where there is one or more intermediate units between two units that are “connected” or “coupled” to each other.
  • the combination or connection between the units may be physical, logical, or a combination of the two.
  • connection can also be replaced with "access”.
  • two units may be considered to be electrically connected by using one or more wires, cables, and/or printed, and as a non-limiting and non-exhaustive example by using a radio frequency region.
  • the electromagnetic energy of the wavelength of the region, the microwave region, and/or the light is "connected” or "bonded” to each other.

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Abstract

本发明的实施例提供了扩频序列选择方法、发射功率的调整方法和通信装置。根据本发明实施例的扩频序列选择方法包括：获得多个用户分组在接收端的接收功率；根据获得接收功率，在扩频序列集合中确定用于用户分组的扩频序列分组。

Description

扩频序列选择方法、发射功率的调整方法和通信装置 技术领域
本发明涉及无线通信领域，并且具体涉及扩频序列选择方法、发射功率的调整方法和通信装置。
背景技术
非正交多址(NOMA)是在3GPP(第三代合作伙伴计划)研究的LTE(长期演进)release 13中提出的无线接入技术。在目前的NOMA系统中，可以通过发射功率对多个移动台进行区分，以便在传输上行链路数据时，将不同移动台的数据复用到相同的子频带上进行发送。从而增加了无线基站可支持同时调度的移动台的数目。
另一方面，在NOMA系统中，在接收端以串行干扰消除(SIC)的方式对所接收到的信息进行解码。根据SIC的方式，接收端在对信号进行解调时首先解码接收功率最高的信息，并且在解码出接收功率最高的信息后将这一部分信息删除，然后解码出接收功率次之的信息，以此类推。也就是说，在接收端根据接收到的信息的接收功率进行解码。然而，在目前的NOMA系统中对多个移动台进行区分时仅考虑其发射功率之间的差异，而由于路径损耗的差异等因素，发射端的功率差异并不等于接收端的功率差异，因此可能导致接收端的性能较差。
发明内容
根据本发明的一个方面，提供了一种扩频序列选择方法，包括：获得多个用户分组在接收端的接收功率；根据获得接收功率，在扩频序列集合中确定用于用户分组的扩频序列分组。
根据本发明的另一方面，提供了一种发射功率的调整方法，应用于移动台，包括：根据移动台的参考信号接收功率，确定所述移动台所属的用户分组；根据所确定的用户分组在接收端的接收功率对所述移动台的发射功率进行调整。
根据本发明的另一方面，提供了一种通信装置，包括：获取单元， 配置来获得多个用户分组在接收端的接收功率；确定单元，配置来根据获得接收功率，在扩频序列集合中确定用于用户分组的扩频序列分组。
根据本发明的另一方面，提供了一种通信装置，包括：分组确定单元，配置来根据移动台的参考信号接收功率，确定所述移动台所属的用户分组；以及调整单元，配置来根据所确定的用户分组在接收端的接收功率对所述移动台的发射功率进行调整。
附图说明
通过结合附图对本发明的实施例进行详细描述，本发明的上述和其它目的、特征、优点将会变得更加清楚。
图1是示出了根据本发明的一个实施例的扩频序列选择方法的流程图。
图2是示出了根据本发明的一个实施例的发射功率的调整方法的流程图。
图3是示出了根据本发明的一个示例，预先设置的各个用户分组在接收端应达到的接收功率的示意图。
图4是示出了根据本发明的一个示例，为了图3中所示的各个用户分组在接收端应达到的接收功率，相应分组中的移动台应实现的发送功率的示意图。
图5是示出了根据本发明一个实施例的通信装置的框图。
图6是示出了根据本发明另一实施例的通信装置的框图。
图7是示出本发明的一实施方式所涉及的通信装置的硬件结构的一例的图。
具体实施方式
下面将参照附图来描述根据本发明实施例的扩频序列选择方法、发射功率的调整方法和通信装置。在附图中，相同的参考标号自始至终表示相同的元件。应当理解：这里描述的实施例仅仅是说明性的， 而不应被解释为限制本发明的范围。此外，这里所述的UE可以包括各种类型的用户终端，例如移动终端(或称为移动台)或者固定终端，然而，为方便起见，在下文中有时候可互换地使用UE和移动台。
以下，参照图1描述根据本发明一个实施例的扩频序列选择方法。图1是示出了根据本发明的一个实施例的扩频序列选择方法100的流程图。根据本发明的一个示例，扩频序列选择方法100可用于通过串行干扰消除(SIC)方式或者其他方式进行接收的通信系统中的通信装置，例如，NOMA系统中的通信装置。
如图1所示，在步骤S101中，获得多个用户分组在接收端的接收功率。在根据本发明的实施例中，通过移动台发送的信息在接收端的接收功率对移动台进行分组。例如，可使用相同的时间和/或频率资源来发送来自不同分组的移动台的数据。
这里，用户分组在接收端的接收功率可以是预先设置的该用户分组在接收端应达到的接收功率。此外，根据本发明的一个示例，还可预先设置用户分组的数量、和/或每个用户分组中所包含的移动台的数量等参数。
在步骤S102中可根据获得接收功率，在扩频序列集合中确定用于用户分组的扩频序列分组。例如，可以预先设置扩频序列集合。本实施例中，用于确定扩展序列的扩展序列集合也可以称为扩展序列矩阵或扩展序列的码本。可替换地，用于确定扩展序列的扩展序列集合还可以称为扩展序列的码书或者Codebook或者扩展序列池或Sequence Pool。相应地，根据扩展序列集合确定的扩展序列也可以称为码字或Codeword或Spreading sequence。
根据本发明的一个示例，在步骤S102中，可根据各个用户分组的接收功率之间的差异，在扩频序列集合中确定用于用户分组的扩频序列分组。具体地，当各个用户分组在接收端的接收功率之间的差异大于或等于预定值时，在步骤S102中，可根据扩频序列集合中各个序列分别对一用户分组中的用户造成的干扰，从扩频序列集合中选择用于该用户分组的扩频序列分组。也就是说，可设定一用户分组中的特定用户使用扩频序列集合中的一特定扩频序列进行传输，可根据当 使用扩频序列集合中除了该特定扩频序列以外的其他各个序列进行传输时，分别对该特定用户分组中的用户造成的干扰，从扩频序列集合中选择用于该用户分组的扩频序列。根据本发明的一个示例，可选择对所述特定用户造成的干扰较小的扩频序列和该特定用户所使用的扩频序列一起，作为该用户分组的扩频序列分组中的扩频序列。
例如，对于扩频序列集合中的一特定序列，可获得扩频序列集合中的其他序列分别与该特定序列之间的相关性，并且选择与该特定序列之间的相关性较低的序列与该特定序列一起，构成针对一用户分组的扩频序列分组。
在上述示例中，由于各个用户分组的接收功率之间的差异足够大，接收端在进行解码时可忽略接收功率较小的用户分组中的移动台发送的信号，并且提取接收功率较大的用户分组中的移动台发送的信号。因此在选择扩频序列时，只考虑针对一个用户分组的扩频序列分组所包含的扩频序列之间的相关性低即可，并且可忽略来自针对其他用户分组的扩频序列分组所包含的扩频序列的影响。
另一方面，当各个用户分组在接收端的接收功率之间的差异小于或等于预定值时，由于各个用户分组的接收功率之间的差异可能不够大，接收端在进行解码时不能忽略接收功率较小的用户分组中的移动台发送的信号。因此在选择扩频序列时，不能忽略来自针对其他用户分组的扩频序列分组所包含的扩频序列的影响。
具体地，当各个用户分组在接收端的接收功率之间的差异小于或等于预定值时，在步骤S102中，根据扩频序列集合中多个序列对一用户分组中的用户造成的干扰之和，从扩频序列集合中选择用于该用户分组的扩频序列分组中的扩频序列。也就是说，可设定一用户分组中的特定用户使用扩频序列集合中的一特定扩频序列进行传输，可根据当使用扩频序列集合中除了该特定扩频序列以外的其他各个序列进行传输时，对该特定用户分组中的用户造成的干扰之和，从扩频序列集合中选择用于该用户分组的扩频序列。
例如，可对于扩频序列集合中的各个扩频序列，分别获得扩频序列集合中的其他序列对该扩频序列的干扰之和，并且根据用户分组的 在接收端的接收功率和所述干扰之和来确定该用户分组的扩频序列分组中的扩频序列。例如，可对在接收端的接收功率大的用户分组分配其他序列对该扩频序列的干扰之和小的扩频序列。
根据本发明的一个示例，这里设定的一用户分组中的特定用户使用扩频序列集合中的特定扩频序列，可以是从扩频序列集合中排除比该用户分组接收功率高的用户分组的扩频序列之后获得的扩频序列中选择的扩频序列。也就是说，优选地，在本示例中按照接收功率由大到小，依次对用户分组的扩频序列进行选择。对任一个用户分组，可在扩频序列中，除了比该用户分组接收功率高的用户分组的扩频序列分组以外的扩频序列中进行选择。此外，在确定扩频序列集合中多个序列对一用户分组中的用户造成的干扰之和时，优选地，可只确定除了比该用户分组接收功率高的用户分组的扩频序列分组以外的扩频序列对一特定序列的干扰之和。
以下，将结合一具体的扩频序列集合的示例，来分别对在各个用户分组的接收功率之间的差异足够大的情况下选择用于用户分组的扩频序列的情形和在各个用户分组的接收功率之间的差异不够大的情况下选择用于用户分组的扩频序列的情形进行描述。
例如，扩频序列集合S可如以下公式1所示：
Figure PCTCN2018105027-appb-000001
其中，公式1的阵列中的每一列为一个扩频序列，D nor为对角矩阵，对角元素分别左侧矩阵每一列向量的范数的倒数。
可计算扩频序列集合S中各个扩频序列之间的相关性，如以下公式(2)所示：
Figure PCTCN2018105027-appb-000002
在本示例中，假设有3个用户分组，并且每个用户分组中有2个 移动台。在各个用户分组的接收功率之间的差异足够大的情况下，如上所述，对于扩频序列集合中的一特定序列，可获得扩频序列集合中的其他序列分别与该特定序列之间的相关性，并且选择与该特定序列之间的相关性较低的序列与该特定序列一起，构成针对一用户分组的扩频序列分组。
根据以上公式2可知，第二至第五扩频序列与第一扩频序列之间的相关性分别为0.5000、0.1291、0.5701、0.2500、0.2887，其中第三扩频序列与第一扩频序列之间的相关性最小，为0.1291。因此，选择第一扩频序列和第三扩频序列作为第一扩频序列分组中的扩频序列。此外，第二扩频序列与第六扩频序列之间的相关性最小，为0.1291。因此，选择第二扩频序列和第六扩频序列作为第二扩频序列分组中的扩频序列。此外，第四扩频序列与第五扩频序列之间的相关性最小，为0.1118。因此，选择第四扩频序列和第五扩频序列作为第三扩频序列分组中的扩频序列。可对每个用户分组分配第一至第三扩频序列分组中的一个分组。
在各个用户分组的接收功率之间的差异不够大的情况下，如上所述，可对于扩频序列集合中的各个扩频序列，分别获得扩频序列集合中的其他序列对该扩频序列的干扰之和，并且可对在接收端的接收功率大的用户分组分配其他序列对该扩频序列的干扰之和小的扩频序列。此外，如上所述，在确定接收功率较小的用户分组的扩频序列分组时，可从扩频序列集合中排除已被选择为用于接收功率较大的用户分组的扩频序列。
例如，在以上公式2中，第一扩频序列受到的其他序列的干扰之和为公式2的公式中的第一行除了第一个元素1.0000以外的其他元素之和。根据以上公式2可知，在第一至第六扩频序列中，第五扩频序列、第六扩频序列受到的其他序列的干扰之和较小。假设3个用户分组中第一用户分组的在接收端的接收功率较大，第二用户分组的在接收端的接收功率次之，第三用户分组的在接收端的接收功率较小。如上所述，首选可对于在接收端的接收功率较大的第一用户分组确定包括受到的其他序列的干扰之和较小的扩频序列的扩频序列分组，即， 确定包括第五扩频序列、第六扩频序列的扩频序列分组。然后，从扩频序列集合中删除第五扩频序列、第六扩频序列，并且根据以上公式2可知，在第一至第四扩频序列中，第三扩频序列、第四扩频序列受到的除了第五扩频序列、第六扩频序列以外的集合中的其他三个序列的干扰之和较小。因此可对于在接收端的接收功率次之的第二用户分组确定包括第三扩频序列、第四扩频序列的扩频序列分组。最后，对在接收端的接收功率较小的第三用户分组确定包括第一扩频序列、第二扩频序列的扩频序列分组。
以上以每个用户分组中包括的移动台的数量相同，并且每个扩频序列分组中包括的扩频序列的数量相同为例进行了描述。可替换地，根据本发明的另一示例，接收端的接收功率较低的用户分组包括的移动台的数量可以比接收端的接收功率较高的用户分组包括的移动台的数量多，相应地，用于接收功率较低的用户分组的扩频序列分组中可包含比用于接收功率较高的用户分组的扩频序列分组多的扩频序列。
在以上结合图1描述的示例中，通过在接收端的接收功率对移动台进行分组，从而，在接收端对所接收到的信息进行解码时，可更有效地利用用户分组之间的功率差异，从而改善了接收性能。
此外，根据本发明的另一实施例，还可对移动台的发射功率进行调整，以控制移动台发送的信息在接收端的接收功率，从而进一步改善接收机的性能。
以下，参照图2描述根据本发明一个实施例的发射功率的调整方法。图2是示出了根据本发明的一个实施例的发射功率的调整方法200的流程图。根据本发明的一个示例，发射功率的调整方法200可用于通过串行干扰消除(SIC)、最大似然、信息传递算法(MPA)等方式进行接收的通信系统中的通信装置，例如，NOMA系统中的通信装置。
如图2所示，在步骤S201中，根据移动台的参考信号接收功率，确定所述移动台所属的用户分组。根据本发明的一个示例，可根据移动台的参考信号接收功率(RSRP)确定移动台的路径损耗。然后，根 据路径损耗确定移动台所属的用户分组。
此外，在步骤S201中确定移动台所属的用户分组时，可不考虑各个用户分组的在接收端的接收功率，也可考虑各个用户分组的在接收端的接收功率。在此，用户分组在接收端的接收功率可以是预先设置的、该用户分组中的移动台所发射的信息在接收端应达到的接收功率。例如，当移动台根据RSRP确定能够到达多个用户分组中一特定用户分组的在接收端的接收功率时，在步骤S201中，可确定移动台属于该特定用户分组。又例如，当移动台根据RSRP确定能够到达多个用户分组中两个或更多用户分组的在接收端的接收功率时，在步骤S201中，可从所述两个或更多用户分组中选择一个用户分组作为移动台属于该特定用户分组。
然后，在步骤S202中，根据所确定的用户分组在接收端的接收功率，对移动台的发射功率进行调整。根据本发明的一个示例，图2中所示的方法可用于基站，即，由基站控制连接到该基站的各个移动台的发射功率。如图2所述，基站可根据一UE的参考信号接收功率，或者根据一UE的参考信号接收功率以及连接到该基站的其他移动台的接收功率来确定UE所属的用户分组，并且根据所确定的用户分组生成用于指示对移动台的发射功率进行调整的功率调整信息。移动台从基站接收该功率调整信息，并根据所接收的功率调整信息对其发射功率进行调整。
根据本发明的另一示例，图2中所示的方法可用于移动台，即，由移动台根据其参考信号接收功率(RSRP)来控制其自身的发射功率。如图2所述，UE可根据其参考信号接收功率来确定该UE所属的用户分组，并且根据所确定的用户分组来对其发射功率进行调整。
此外，根据本发明的另一示例，在步骤S202中，可通过分组调整功率、移动台调整功率、路径损耗补偿因子、校正因子、功率调整信息等一个或多个参数对移动台的发射功率进行调整。
例如，为了实现各个用户分组在接收端应达到的接收功率，可对每个用户分组确定该分组调整功率，以调整该用户分组中的移动台的发射功率。图3是示出了根据本发明的一个示例，预先设置的各个用 户分组在接收端应达到的接收功率的示意图。在图3所示的示例中，存在3个用户分组，PL1-PL3分别为用户分组1-3的最大路径损耗，Pr1-Pr3所对应的实线线段为用户分组1-3的接收功率。Pmax为最大传输功率。图4是示出了根据本发明的一个示例，为了图3中所示的各个用户分组在接收端应达到的接收功率，相应分组中的移动台应实现的发送功率的示意图。具体地，在图4中，Pt1-Pt3为所对应的实线线段为用户分组1-3为了到达接收功率Pr1-Pr3，在不同的路径损耗下应具有的发送功率。
在图3和图4所示的示例中，根据步骤S202，可根据所确定的用户分组，确定分组调整功率P 0_Group。然后，根据分组调整功率P 0_Group对所述移动台的发射功率进行调整。
例如，可通过以下公式3来确定对于特定分组n的分组调整功率P 0_Group：
P 0_Group＝P n≤P max……(3)
其中，P max为最大传输功率，P n为分组n在接收端的接收功率。
此外，根据本发明的一个示例，对于包括小区中心用户的用户分组，可设定P 0_Group的取值范围为[-126,24]dBm。对于其他的用户分组，可设定P 0_Group的取值范围为[-126,24]-(n-1)*P gapdBm，其中，P gap为相邻用户分组之间的功率差。
除了基于上述分组调整功率对移动台的发射功率进行调整以外，还可基于该移动台自身的路径损耗，通过移动台调整功率来进一步调整移动台的发射功率。根据本发明的一个示例，图2中所示的方法可包括根据移动台的路径损耗确定移动台调整功率，然后根据移动台调整功率对所述移动台的发射功率进行调整。例如，可通过以下公式4来确定移动台调整功率P 0_UE：
P 0_UE＝(1-α)·PL……(4)
其中，α为路径损耗补偿因子，0≤α≤1，PL为移动台的路径损耗。根据本发明的一个示例，对于以上分组调整功率P 0_Group，可默认路径损耗补偿因子α＝1。因此，当α<1时，可通过P 0_UE来补偿相邻用户分组之间的功率差。
此外，根据本发明的另一示例，在步骤S202中可根据路径损耗补偿因子对所述移动台的发射功率进行调整。具体地，在步骤S202中，可根据移动台所属的用户分组的在接收端的接收功率和移动台的路径损耗，确定移动台的路径损耗补偿因子。然后根据路径损耗补偿因子对移动台的发射功率进行调整。例如，可通过以下公式5来确定路径损耗补偿因子α：
Figure PCTCN2018105027-appb-000003
其中P 0为标称功率，可预先设置该标称功率。如以上公式5所示，可根据给定的标称功率和UE的路径损耗调整来确定路径损耗补偿因子α。此外，根据本发明的一个示例，α可以在[0,1]的范围内连续变化。可替换地，也可预先设置α的取值集合。在步骤S202中，可根据所确定α(例如通过公式5)的取值集合中进行选择，以获得α的最终取值。根据本发明的一个示例，可对于所有用户设置同样的α的取值集合，例如，{0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1}。可替换地，也可对于不同用户分组设置不同的α的取值集合。例如，对于中心用户分组，可设置α的取值集合{0,0.1,0.2,0.3,0.4,0.5,0.6}，对于边缘用户分组，可设置α的取值集合{0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1}，对于剩余用户，设置α的取值集合{0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8}。
此外，根据本发明的另一示例，图2中所示的方法还可包括获得与移动台所属的用户分组相邻的用户分组的在接收端的接收功率。在步骤S202中，可根据所确定的用户分组在接收端的接收功率和移动台的路径损耗，对所述移动台的发射功率进行调整。例如，对于给定的标称功率、路径损耗补偿因子，可根据所确定的用户分组在接收端的接收功率、以及移动台的路径损耗来确定校正因子，以对移动台的发射功率进行调整。
此外，根据本发明的另一示例，基站也可根据UE的情况对该UE发送功率调整信息以进一步调整其发射功率。具体地，图2中所示的方法还可包括接收基站发送的功率调整信息。并且根据所述功率调整 信息对所述移动台的发射功率进行调整。
在以上结合图2-4描述的示例中，通过根据用户分组在接收端的接收功率对所述移动台的发射功率进行调整，从而，在接收端对所接收到的信息进行解码时，可更有效地利用用户分组之间的功率差异，从而改善了接收性能。
下面，参照图5来描述根据本发明一个实施例的通信装置。在根据本发明的实施例中，通信装置可以是移动台、或基站等。图5是示出了根据本发明一个实施例的通信装置500的框图。如图5所示，通信装置500包括获取单元510和确定单元520。除了这两个单元以外，通信装置500还可以包括其他部件，然而，由于这些部件与本发明实施例的内容无关，因此在这里省略其图示和描述。此外，由于根据本发明实施例的通信装置500执行的下述操作的具体细节与在上文中参照图1以及公式1和2描述的细节相同，因此在这里为了避免重复而省略对相同细节的重复描述。
如图5所示，获取单元510获得多个用户分组在接收端的接收功率。在根据本发明的实施例中，通过移动台发送的信息在接收端的接收功率对移动台进行分组。例如，可使用相同的时间和/或频率资源来发送来自不同分组的移动台的数据。
这里，用户分组在接收端的接收功率可以是预先设置的该用户分组在接收端应达到的接收功率。此外，根据本发明的一个示例，还可预先设置用户分组的数量、和/或每个用户分组中所包含的移动台的数量等参数。
确定单元520可根据获得接收功率，在扩频序列集合中确定用于用户分组的扩频序列分组。例如，可以预先设置扩频序列集合。本实施例中，用于确定扩展序列的扩展序列集合也可以称为扩展序列矩阵或扩展序列的码本。可替换地，用于确定扩展序列的扩展序列集合还可以称为扩展序列的码书或者Codebook或者扩展序列池或Sequence Pool。相应地，根据扩展序列集合确定的扩展序列也可以称为码字或Codeword或Spreading sequence。
根据本发明的一个示例，确定单元520可根据各个用户分组的 接收功率之间的差异，在扩频序列集合中确定用于用户分组的扩频序列分组。具体地，当各个用户分组在接收端的接收功率之间的差异大于或等于预定值时，确定单元520可根据扩频序列集合中各个序列分别对一用户分组中的用户造成的干扰，从扩频序列集合中选择用于该用户分组的扩频序列分组。也就是说，可设定一用户分组中的特定用户使用扩频序列集合中的一特定扩频序列进行传输，可根据当使用扩频序列集合中除了该特定扩频序列以外的其他各个序列进行传输时，分别对该特定用户分组中的用户造成的干扰，从扩频序列集合中选择用于该用户分组的扩频序列。根据本发明的一个示例，可选择对所述特定用户造成的干扰较小的扩频序列和该特定用户所使用的扩频序列一起，作为该用户分组的扩频序列分组中的扩频序列。
例如，对于扩频序列集合中的一特定序列，可获得扩频序列集合中的其他序列分别与该特定序列之间的相关性，并且选择与该特定序列之间的相关性较低的序列与该特定序列一起，构成针对一用户分组的扩频序列分组。
在上述示例中，由于各个用户分组的接收功率之间的差异足够大，接收端在进行解码时可忽略接收功率较小的用户分组中的移动台发送的信号，并且而提取接收功率较大的用户分组中的移动台发送的信号。因此在选择扩频序列时，只考虑针对一个用户分组的扩频序列分组所包含的扩频序列之间的相关性低即可，并且可忽略来自针对其他用户分组的扩频序列分组所包含的扩频序列的影响。
另一方面，当各个用户分组在接收端的接收功率之间的差异小于或等于预定值时，由于各个用户分组的接收功率之间的差异可能不够大，接收端在进行解码时不能忽略接收功率较小的用户分组中的移动台发送的信号。因此在选择扩频序列时，不能忽略来自针对其他用户分组的扩频序列分组所包含的扩频序列的影响。
具体地，当各个用户分组在接收端的接收功率之间的差异小于或等于预定值时，确定单元520可根据扩频序列集合中多个序列对一用户分组中的用户造成的干扰之和，从扩频序列集合中选择用于该用户分组的扩频序列分组中的扩频序列。也就是说，可设定一用户分组中 的特定用户使用扩频序列集合中的一特定扩频序列进行传输，可根据当使用扩频序列集合中除了该特定扩频序列以外的其他各个序列进行传输时，对该特定用户分组中的用户造成的干扰之和，从扩频序列集合中选择用于该用户分组的扩频序列。
例如，可对于扩频序列集合中的各个扩频序列，分别获得扩频序列集合中的其他序列对该扩频序列的干扰之和，并且根据用户分组的在接收端的接收功率和所述干扰之和来确定该用户分组的扩频序列分组中的扩频序列。例如，可对在接收端的接收功率大的用户分组分配其他序列对该扩频序列的干扰之和小的扩频序列。
根据本发明的一个示例，这里设定的一用户分组中的特定用户使用扩频序列集合中的特定扩频序列，可以是从扩频序列集合中排除比该用户分组接收功率高的用户分组的扩频序列之后获得的扩频序列中选择的扩频序列。也就是说，优选地，在本示例中按照接收功率由大到小，依次对用户分组的扩频序列进行选择。对任一个用户分组，可在扩频序列中，除了比该用户分组接收功率高的用户分组的扩频序列分组以外的扩频序列中进行选择。此外，在确定扩频序列集合中多个序列对一用户分组中的用户造成的干扰之和时，优选地，可只确定除了比该用户分组接收功率高的用户分组的扩频序列分组以外的扩频序列对一特定序列的干扰之和。
根据本发明的一个示例，每个用户分组中包括的移动台的数量相同，并且每个扩频序列分组中包括的扩频序列的数量相同。可替换地，根据本发明的另一示例，接收端的接收功率较低的用户分组包括的移动台的数量可以比接收端的接收功率较高的用户分组包括的移动台的数量多，相应地，用于接收功率较低的用户分组的扩频序列分组中可包含比用于接收功率较高的用户分组的扩频序列分组多的扩频序列。
在以上结合图5描述的示例中，通过在接收端的接收功率对移动台进行分组，从而，在接收端对所接收到的信息进行解码时，可更有效地利用用户分组之间的功率差异，从而改善了接收性能。
此外，根据本发明的另一实施例，还可对移动台的发射功率进行 调整，以控制移动台发送的信息在接收端的接收功率，从而进一步改善接收机的性能。
下面，参照图6来描述根据本发明另一实施例的通信装置。在根据本发明的实施例中，通信装置可以是移动台、或基站等。图6是示出了根据本发明另一实施例的通信装置600的框图。如图6所示，通信装置600包括分组确定单元610和调整单元620。除了这两个单元以外，通信装置600还可以包括其他部件，然而，由于这些部件与本发明实施例的内容无关，因此在这里省略其图示和描述。此外，由于根据本发明实施例的通信装置600执行的下述操作的具体细节与在上文中参照图2至4以及公式3-6描述的细节相同，因此在这里为了避免重复而省略对相同细节的重复描述。
如图6所示，分组确定单元610可根据移动台的参考信号接收功率，确定所述移动台所属的用户分组。根据本发明的一个示例，可根据移动台的参考信号接收功率(RSRP)确定移动台的路径损耗。然后，根据路径损耗确定移动台所属的用户分组。
此外，分组确定单元610在确定移动台所属的用户分组时，可不考虑各个用户分组的在接收端的接收功率，也可考虑各个用户分组的在接收端的接收功率。在此，用户分组在接收端的接收功率可以是预先设置的、该用户分组中的移动台所发射的信息在接收端应达到的接收功率。例如，当移动台根据RSRP确定能够到达多个用户分组中一特定用户分组的在接收端的接收功率时，分组确定单元610可确定移动台属于该特定用户分组。又例如，当移动台根据RSRP确定能够到达多个用户分组中两个或更多用户分组的在接收端的接收功率时，分组确定单元610可从所述两个或更多用户分组中选择一个用户分组作为移动台属于该特定用户分组。
然后，调整单元620可根据所确定的用户分组在接收端的接收功率，对移动台的发射功率进行调整。根据本发明的一个示例，图2中所示的方法可用于基站，即，由基站控制连接到该基站的各个移动台的发射功率。如图2所述，基站可根据一UE的参考信号接收功率，或者根据一UE的参考信号接收功率以及连接到该基站的其他移动台 的接收功率来确定UE所属的用户分组，并且根据所确定的用户分组生成用于指示对移动台的发射功率进行调整的功率调整信息。移动台从基站接收该功率调整信息，并根据所接收的功率调整信息对其发射功率进行调整。
根据本发明的另一示例，图2中所示的方法可用于移动台，即，由移动台根据其参考信号接收功率(RSRP)来控制其自身的发射功率。如图2所述，UE可根据其参考信号接收功率来确定该UE所属的用户分组，并且根据所确定的用户分组来对其发射功率进行调整。
此外，根据本发明的另一示例，调整单元620可通过分组调整功率、移动台调整功率、路径损耗补偿因子、校正因子、功率调整信息等一个或多个参数对移动台的发射功率进行调整。例如，为了实现各个用户分组在接收端应达到的接收功率，调整单元620可对每个用户分组确定该分组调整功率，以调整该用户分组中的移动台的发射功率。以上已结合图3-4以及公式3对确定对于特定分组n的分组调整功率P 0_Group的示例进行了说明，故在此不再赘述。
除了基于上述分组调整功率对移动台的发射功率进行调整以外，还可基于该移动台自身的路径损耗，通过移动台调整功率来进一步调整移动台的发射功率。根据本发明的一个示例，调整单元620可根据移动台的路径损耗确定移动台调整功率，然后根据移动台调整功率对所述移动台的发射功率进行调整。例如，可通过以上公式4来确定移动台调整功率P 0_UE。
此外，根据本发明的另一示例，调整单元620可根据路径损耗补偿因子对所述移动台的发射功率进行调整。具体地，调整单元620可根据移动台所属的用户分组的在接收端的接收功率和移动台的路径损耗，确定移动台的路径损耗补偿因子。然后根据路径损耗补偿因子对移动台的发射功率进行调整。例如，可通过以上公式5来确定路径损耗补偿因子α。此外，根据本发明的一个示例，α可以在[0,1]的范围内连续变化。可替换地，也可预先设置α的取值集合。调整单元620可根据所确定α(例如通过公式5)的取值集合中进行选择，以获得α的最终取值。根据本发明的一个示例，可对于所有用户设置同样的α 的取值集合，例如，{0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1}。可替换地，也可对于不同用户分组设置不同的α的取值集合。例如，对于中心用户分组，可设置α的取值集合{0,0.1,0.2,0.3,0.4,0.5,0.6}，对于边缘用户分组，可设置α的取值集合{0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1}，对于剩余用户，设置α的取值集合{0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8}。
此外，根据本发明的另一示例，通信装置600还可包括获取单元。获取单元可获得与移动台所属的用户分组相邻的用户分组的在接收端的接收功率。调整单元620可根据所确定的用户分组在接收端的接收功率和移动台的路径损耗，对所述移动台的发射功率进行调整。例如，对于给定的标称功率、路径损耗补偿因子，可根据所确定的用户分组在接收端的接收功率、以及移动台的路径损耗来确定校正因子，以对移动台的发射功率进行调整。
此外，根据本发明的另一示例，基站也可根据UE的情况对该UE发送功率调整信息以进一步调整其发射功率。具体地，在通信装置为移动台的情况下，其还可包括接收单元，以接收基站发送的功率调整信息。调整单元620可根据所述功率调整信息对所述移动台的发射功率进行调整。
在以上结合图6描述的示例中，通过根据用户分组在接收端的接收功率对所述移动台的发射功率进行调整，从而，在接收端以串行干扰消除(SIC)、最大似然、信息传递算法(MPA)等方式对所接收到的信息进行解码时，可更有效地利用用户分组之间的功率差异，从而改善了接收性能。
<硬件结构>
本发明的一实施方式中的无线基站、用户终端等可以作为执行本发明的无线通信方法的处理的计算机来发挥功能。图7是示出本发明的一实施方式所涉及的通信装置的硬件结构的一例的图。上述的通信装置500、600中的任意一个可以作为在物理上包括处理器710、内存720、存储器730、通信装置740、输入装置750、输出装置760、总线770等的计算机装置来构成。
另外，在以下的说明中，“装置”这样的文字也可替换为电路、设备、单元等。上述的通信装置500、600中的任意一个的硬件结构可以包括一个或多个图中所示的各装置，也可以不包括部分装置。
例如，处理器710仅图示出一个，但也可以为多个处理器。此外，可以通过一个处理器来执行处理，也可以通过一个以上的处理器同时、依次、或采用其它方法来执行处理。另外，处理器710可以通过一个以上的芯片来安装。
上述的通信装置500、600中的任意一个中的各功能例如通过如下方式实现：通过将规定的软件(程序)读入到处理器710、内存720等硬件上，从而使处理器710进行运算，对由通信装置740进行的通信进行控制，并对内存720和存储器730中的数据的读出和/或写入进行控制。
处理器710例如使操作系统进行工作从而对计算机整体进行控制。处理器710可以由包括与周边装置的接口、控制装置、运算装置、寄存器等的中央处理器(CPU，Central Processing Unit)构成。例如，上述的获取单元510、确定单元520、分组确定单元610、调整单元620等可以通过处理器710实现。
此外，处理器710将程序(程序代码)、软件模块、数据等从存储器730和/或通信装置740读出到内存720，并根据它们执行各种处理。作为程序，可以采用使计算机执行在上述实施方式中说明的动作中的至少一部分的程序。
内存720是计算机可读取记录介质，例如可以由只读存储器(ROM，Read Only Memory)、可编程只读存储器(EPROM，Erasable Programmable ROM)、电可编程只读存储器(EEPROM，Electrically EPROM)、随机存取存储器(RAM，Random Access Memory)、其它适当的存储介质中的至少一个来构成。内存720也可以称为寄存器、高速缓存、主存储器(主存储装置)等。内存720可以保存用于实施本发明的一实施方式所涉及的无线通信方法的可执行程序(程序代码)、软件模块等。
存储器730是计算机可读取记录介质，例如可以由软磁盘 (flexible disk)、软(注册商标)盘(floppy disk)、磁光盘(例如，只读光盘(CD-ROM(Compact Disc ROM)等)、数字通用光盘、蓝光(Blu-ray，注册商标)光盘)、可移动磁盘、硬盘驱动器、智能卡、闪存设备(例如，卡、棒(stick)、密钥驱动器(key driver))、磁条、数据库、服务器、其它适当的存储介质中的至少一个来构成。存储器730也可以称为辅助存储装置。
通信装置740是用于通过有线和/或无线网络进行计算机间的通信的硬件(发送接收设备)，例如也称为网络设备、网络控制器、网卡、通信模块等。通信装置740为了实现例如频分双工(FDD，Frequency Division Duplex)和/或时分双工(TDD，Time Division Duplex)，可以包括高频开关、双工器、滤波器、频率合成器等。例如，上述的发送单元710、接收单元810等可以通过通信装置740来实现。
输入装置750是接受来自外部的输入的输入设备(例如，键盘、鼠标、麦克风、开关、按钮、传感器等)。输出装置760是实施向外部的输出的输出设备(例如，显示器、扬声器、发光二极管(LED，Light Emitting Diode)灯等)。另外，输入装置750和输出装置760也可以为一体的结构(例如触控面板)。
此外，处理器710、内存720等各装置通过用于对信息进行通信的总线770连接。总线770可以由单一的总线构成，也可以由装置间不同的总线构成。
此外，上述的通信装置500、600中的任意一个可以包括微处理器、数字信号处理器(DSP，Digital Signal Processor)、专用集成电路(ASIC，Application Specific Integrated Circuit)、可编程逻辑器件(PLD，Programmable Logic Device)、现场可编程门阵列(FPGA，Field Programmable Gate Array)等硬件，可以通过该硬件来实现各功能块的部分或全部。例如，处理器710可以通过这些硬件中的至少一个来安装。
(变形例)
另外，关于本说明书中说明的用语和/或对本说明书进行理解所需的用语，可以与具有相同或类似含义的用语进行互换。例如，信道 和/或符号也可以为信号(信令)。此外，信号也可以为消息。参考信号也可以简称为RS(Reference Signal)，根据所适用的标准，也可以称为导频(Pilot)、导频信号等。此外，分量载波(CC，Component Carrier)也可以称为小区、频率载波、载波频率等。
此外，无线帧在时域中可以由一个或多个期间(帧)构成。构成无线帧的该一个或多个期间(帧)中的每一个也可以称为子帧。进而，子帧在时域中可以由一个或多个时隙构成。子帧可以是不依赖于参数配置(numerology)的固定的时间长度(例如1ms)。
进而，时隙在时域中可以由一个或多个符号(正交频分复用(OFDM，Orthogonal Frequency Division Multiplexing)符号、单载波频分多址(SC-FDMA，Single Carrier Frequency Division Multiple Access)符号等)构成。此外，时隙也可以是基于参数配置的时间单元。此外，时隙还可以包括多个微时隙。各微时隙在时域中可以由一个或多个符号构成。此外，微时隙也可以称为子时隙。
无线帧、子帧、时隙、微时隙以及符号均表示传输信号时的时间单元。无线帧、子帧、时隙、微时隙以及符号也可以使用各自对应的其它名称。例如，一个子帧可以被称为传输时间间隔(TTI，Transmission Time Interval)，多个连续的子帧也可以被称为TTI，一个时隙或一个微时隙也可以被称为TTI。也就是说，子帧和/或TTI可以是现有的LTE中的子帧(1ms)，也可以是短于1ms的期间(例如1～13个符号)，还可以是长于1ms的期间。另外，表示TTI的单元也可以称为时隙、微时隙等而非子帧。
在此，TTI例如是指无线通信中调度的最小时间单元。例如，在LTE系统中，无线基站对各用户终端进行以TTI为单位分配无线资源(在各用户终端中能够使用的频带宽度、发射功率等)的调度。另外，TTI的定义不限于此。
TTI可以是经过信道编码的数据包(传输块)、码块、和/或码字的发送时间单元，也可以是调度、链路适配等的处理单元。另外，在给出TTI时，实际上与传输块、码块、和/或码字映射的时间区间(例如符号数)也可以短于该TTI。
另外，一个时隙或一个微时隙被称为TTI时，一个以上的TTI(即一个以上的时隙或一个以上的微时隙)也可以成为调度的最小时间单元。此外，构成该调度的最小时间单元的时隙数(微时隙数)可以受到控制。
具有1ms时间长度的TTI也可以称为常规TTI(LTE Rel.8-12中的TTI)、标准TTI、长TTI、常规子帧、标准子帧、或长子帧等。短于常规TTI的TTI也可以称为压缩TTI、短TTI、部分TTI(partial或fractional TTI)、压缩子帧、短子帧、微时隙、或子时隙等。
另外，长TTI(例如常规TTI、子帧等)也可以用具有超过1ms的时间长度的TTI来替换，短TTI(例如压缩TTI等)也可以用具有比长TTI的TTI长度短且1ms以上的TTI长度的TTI来替换。
资源块(RB，Resource Block)是时域和频域的资源分配单元，在频域中，可以包括一个或多个连续的副载波(子载波(subcarrier))。此外，RB在时域中可以包括一个或多个符号，也可以为一个时隙、一个微时隙、一个子帧或一个TTI的长度。一个TTI、一个子帧可以分别由一个或多个资源块构成。另外，一个或多个RB也可以称为物理资源块(PRB，Physical RB)、子载波组(SCG，Sub-Carrier Group)、资源单元组(REG，Resource Element Group)、PRG对、RB对等。
此外，资源块也可以由一个或多个资源单元(RE，Resource Element)构成。例如，一个RE可以是一个子载波和一个符号的无线资源区域。
另外，上述的无线帧、子帧、时隙、微时隙以及符号等的结构仅仅为示例。例如，无线帧中包括的子帧数、每个子帧或无线帧的时隙数、时隙内包括的微时隙数、时隙或微时隙中包括的符号和RB的数目、RB中包括的子载波数、以及TTI内的符号数、符号长度、循环前缀(CP，Cyclic Prefix)长度等的结构可以进行各种各样的变更。
此外，本说明书中说明的信息、参数等可以用绝对值来表示，也可以用与规定值的相对值来表示，还可以用对应的其它信息来表示。例如，无线资源可以通过规定的索引来指示。进一步地，使用这些参数的公式等也可以与本说明书中明确公开的不同。
在本说明书中用于参数等的名称在任何方面都并非限定性的。例如，各种各样的信道(物理上行链路控制信道(PUCCH，Physical Uplink Control Channel)、物理下行链路控制信道(PDCCH，Physical Downlink Control Channel)等)和信息单元可以通过任何适当的名称来识别，因此为这些各种各样的信道和信息单元所分配的各种各样的名称在任何方面都并非限定性的。
本说明书中说明的信息、信号等可以使用各种各样不同技术中的任意一种来表示。例如，在上述的全部说明中可能提及的数据、命令、指令、信息、信号、比特、符号、芯片等可以通过电压、电流、电磁波、磁场或磁性粒子、光场或光子、或者它们的任意组合来表示。
此外，信息、信号等可以从上层向下层、和/或从下层向上层输出。信息、信号等可以经由多个网络节点进行输入或输出。
输入或输出的信息、信号等可以保存在特定的场所(例如内存)，也可以通过管理表进行管理。输入或输出的信息、信号等可以被覆盖、更新或补充。输出的信息、信号等可以被删除。输入的信息、信号等可以被发往其它装置。
信息的通知并不限于本说明书中说明的方式/实施方式，也可以通过其它方法进行。例如，信息的通知可以通过物理层信令(例如，下行链路控制信息(DCI，Downlink Control Information)、上行链路控制信息(UCI，Uplink Control Information))、上层信令(例如，无线资源控制(RRC，Radio Resource Control)信令、广播信息(主信息块(MIB，Master Information Block)、系统信息块(SIB，System Information Block)等)、媒体存取控制(MAC，Medium Access Control)信令)、其它信号或者它们的组合来实施。
另外，物理层信令也可以称为L1/L2(第1层/第2层)控制信息(L1/L2控制信号)、L1控制信息(L1控制信号)等。此外，RRC信令也可以称为RRC消息，例如可以为RRC连接建立(RRC Connection Setup)消息、RRC连接重配置(RRC Connection Reconfiguration)消息等。此外，MAC信令例如可以通过MAC控制单元(MAC CE(Control Element))来通知。
此外，规定信息的通知(例如，“为X”的通知)并不限于显式地进行，也可以隐式地(例如，通过不进行该规定信息的通知，或者通过其它信息的通知)进行。
关于判定，可以通过由1比特表示的值(0或1)来进行，也可以通过由真(true)或假(false)表示的真假值(布尔值)来进行，还可以通过数值的比较(例如与规定值的比较)来进行。
软件无论被称为软件、固件、中间件、微代码、硬件描述语言，还是以其它名称来称呼，都应宽泛地解释为是指命令、命令集、代码、代码段、程序代码、程序、子程序、软件模块、应用程序、软件应用程序、软件包、例程、子例程、对象、可执行文件、执行线程、步骤、功能等。
此外，软件、命令、信息等可以经由传输介质被发送或接收。例如，当使用有线技术(同轴电缆、光缆、双绞线、数字用户线路(DSL，Digital Subscriber Line)等)和/或无线技术(红外线、微波等)从网站、服务器、或其它远程资源发送软件时，这些有线技术和/或无线技术包括在传输介质的定义内。
本说明书中使用的“系统”和“网络”这样的用语可以互换使用。
在本说明书中，“无线基站(BS，Base Station)”、“无线基站”、“eNB”、“gNB”、“小区”、“扇区”、“小区组”、“载波”以及“分量载波”这样的用语可以互换使用。无线基站有时也以固定台(fixed station)、NodeB、eNodeB(eNB)、接入点(access point)、发送点、接收点、毫微微小区、小小区等用语来称呼。
无线基站可以容纳一个或多个(例如三个)小区(也称为扇区)。当无线基站容纳多个小区时，无线基站的整个覆盖区域可以划分为多个更小的区域，每个更小的区域也可以通过无线基站子系统(例如，室内用小型无线基站(射频拉远头(RRH，Remote Radio Head)))来提供通信服务。“小区”或“扇区”这样的用语是指在该覆盖中进行通信服务的无线基站和/或无线基站子系统的覆盖区域的一部分或整体。
在本说明书中，“移动台(MS，Mobile Station)”、“用户终端(user terminal)”、“用户装置(UE，User Equipment)”以及“终端”这样的用 语可以互换使用。无线基站有时也以固定台(fixed station)、NodeB、eNodeB(eNB)、接入点(access point)、发送点、接收点、毫微微小区、小小区等用语来称呼。
移动台有时也被本领域技术人员以用户台、移动单元、用户单元、无线单元、远程单元、移动设备、无线设备、无线通信设备、远程设备、移动用户台、接入终端、移动终端、无线终端、远程终端、手持机、用户代理、移动客户端、客户端或者若干其它适当的用语来称呼。
此外，本说明书中的无线基站也可以用用户终端来替换。例如，对于将无线基站和用户终端间的通信替换为多个用户终端间(D2D，Device-to-Device)的通信的结构，也可以应用本发明的各方式/实施方式。同样，本说明书中的用户终端也可以用无线基站来替换。
在本说明书中，设为通过无线基站进行的特定动作根据情况有时也通过其上级节点(upper node)来进行。显然，在具有无线基站的由一个或多个网络节点(network nodes)构成的网络中，为了与终端间的通信而进行的各种各样的动作可以通过无线基站、除无线基站之外的一个以上的网络节点(可以考虑例如移动管理实体(MME，Mobility Management Entity)、服务网关(S-GW，Serving-Gateway)等，但不限于此)、或者它们的组合来进行。
本说明书中说明的各方式/实施方式可以单独使用，也可以组合使用，还可以在执行过程中进行切换来使用。此外，本说明书中说明的各方式/实施方式的处理步骤、序列、流程图等只要没有矛盾，就可以更换顺序。例如，关于本说明书中说明的方法，以示例性的顺序给出了各种各样的步骤单元，而并不限定于给出的特定顺序。
本说明书中说明的各方式/实施方式可以应用于利用长期演进(LTE，Long Term Evolution)、高级长期演进(LTE-A，LTE-Advanced)、超越长期演进(LTE-B，LTE-Beyond)、超级第3代移动通信系统(SUPER 3G)、高级国际移动通信(IMT-Advanced)、第4代移动通信系统(4G，4th generation mobile communication system)、第5代移动通信系统(5G，5th generation mobile communication system)、未来无线接入(FRA，Future Radio Access)、新无线接入技术(New-RAT， Radio Access Technology)、新无线(NR，New Radio)、新无线接入(NX，New radio access)、新一代无线接入(FX，Future generation radio access)、全球移动通信系统(GSM(注册商标)，Global System for Mobile communications)、码分多址接入2000(CDMA2000)、超级移动宽带(UMB，Ultra Mobile Broadband)、IEEE 802.11(Wi-Fi(注册商标))、IEEE 802.16(WiMAX(注册商标))、IEEE 802.20、超宽带(UWB，Ultra-WideBand)、蓝牙(Bluetooth(注册商标))、其它适当的无线通信方法的系统和/或基于它们而扩展的下一代系统。
本说明书中使用的“根据”这样的记载，只要未在其它段落中明确记载，则并不意味着“仅根据”。换言之，“根据”这样的记载是指“仅根据”和“至少根据”这两者。
本说明书中使用的对使用“第一”、“第二”等名称的单元的任何参照，均非全面限定这些单元的数量或顺序。这些名称可以作为区别两个以上单元的便利方法而在本说明书中使用。因此，第一单元和第二单元的参照并不意味着仅可采用两个单元或者第一单元必须以若干形式占先于第二单元。
本说明书中使用的“判断(确定)(determining)”这样的用语有时包含多种多样的动作。例如，关于“判断(确定)”，可以将计算(calculating)、推算(computing)、处理(processing)、推导(deriving)、调查(investigating)、搜索(looking up)(例如表、数据库、或其它数据结构中的搜索)、确认(ascertaining)等视为是进行“判断(确定)”。此外，关于“判断(确定)”，也可以将接收(receiving)(例如接收信息)、发送(transmitting)(例如发送信息)、输入(input)、输出(output)、存取(accessing)(例如存取内存中的数据)等视为是进行“判断(确定)”。此外，关于“判断(确定)”，还可以将解决(resolving)、选择(selecting)、选定(choosing)、建立(establishing)、比较(comparing)等视为是进行“判断(确定)”。也就是说，关于“判断(确定)”，可以将若干动作视为是进行“判断(确定)”。
本说明书中使用的“连接的(connected)”、“结合的(coupled)”这样的用语或者它们的任何变形是指两个或两个以上单元间的直接 的或间接的任何连接或结合，可以包括以下情况：在相互“连接”或“结合”的两个单元间，存在一个或一个以上的中间单元。单元间的结合或连接可以是物理上的，也可以是逻辑上的，或者还可以是两者的组合。例如，“连接”也可以替换为“接入”。在本说明书中使用时，可以认为两个单元是通过使用一个或一个以上的电线、线缆、和/或印刷电气连接，以及作为若干非限定性且非穷尽性的示例，通过使用具有射频区域、微波区域、和/或光(可见光及不可见光这两者)区域的波长的电磁能等，被相互“连接”或“结合”。
在本说明书或权利要求书中使用“包括(including)”、“包含(comprising)”、以及它们的变形时，这些用语与用语“具备”同样是开放式的。进一步地，在本说明书或权利要求书中使用的用语“或(or)”并非是异或。
以上对本发明进行了详细说明，但对于本领域技术人员而言，显然，本发明并非限定于本说明书中说明的实施方式。本发明在不脱离由权利要求书的记载所确定的本发明的宗旨和范围的前提下，可以作为修改和变更方式来实施。因此，本说明书的记载是以示例说明为目的，对本发明而言并非具有任何限制性的意义。

Claims (13)

  1. 一种扩频序列选择方法，包括：
    获得多个用户分组在接收端的接收功率；
    根据获得接收功率，在扩频序列集合中确定用于用户分组的扩频序列分组。
  2. 如权利要求1所述的方法，其中根据获得接收功率，在扩频序列集合中确定用于用户分组的扩频序列分组包括：
    当各个用户分组在接收端的接收功率之间的差异大于或等于预定值时，根据所述扩频序列集合中各个序列分别对一用户分组中的用户造成的干扰，从所述扩频序列集合中选择用于该用户分组的扩频序列分组。
  3. 如权利要求1所述的方法，其中根据获得接收功率，在扩频序列集合中确定用于用户分组的扩频序列分组包括：
    当各个用户分组在接收端的接收功率之间的差异小于或等于预定值时，根据所述扩频序列集合中多个序列对一用户分组中的用户造成的干扰之和，从所述扩频序列集合中选择用于该用户分组的扩频序列分组。
  4. 一种发射功率的调整方法，包括：
    根据移动台的参考信号接收功率，确定所述移动台所属的用户分组；
    根据所确定的用户分组在接收端的接收功率对所述移动台的发射功率进行调整。
  5. 如权利要求4所述的方法，其中根据移动台的参考信号接收功率，确定所述移动台所属的用户分组包括：
    根据所述移动台的参考信号接收功率确定所述移动台的路径损耗，以及
    根据所述路径损耗确定所述移动台所属的用户分组。
  6. 如权利要求4或5所述的方法，其中根据所确定的用户分组在接收端的接收功率对所述移动台的发射功率进行调整包括：
    根据所确定的用户分组，确定分组调整功率；
    根据所述分组调整功率对所述移动台的发射功率进行调整。
  7. 如权利要求6所述的方法，还包括：
    根据所述移动台的路径损耗确定移动台调整功率；
    根据所述移动台调整功率对所述移动台的发射功率进行调整。
  8. 如权利要求4或5所述的方法，其中所述根据所确定的用户分组在接收端的接收功率对所述移动台的发射功率进行调整包括：
    根据移动台所属的用户分组的在接收端的接收功率和所述移动台的路径损耗，确定所述移动台的路径损耗补偿因子，
    根据所述路径损耗补偿因子对所述移动台的发射功率进行调整。
  9. 如权利要求4或5所述的方法，其中所述根据所确定的用户分组在接收端的接收功率对所述移动台的发射功率进行调整包括：
    根据所确定的用户分组在接收端的接收功率和所述移动台的路径损耗，对所述移动台的发射功率进行调整。
  10. 如权利要求4或5所述的方法，还包括：
    接收基站发送的功率调整信息；以及
    根据所述功率调整信息对所述移动台的发射功率进行调整。
  11. 一种通信装置，包括：
    获取单元，配置来获得多个用户分组在接收端的接收功率；
    确定单元，配置来根据获得接收功率，在扩频序列集合中确定用于用户分组的扩频序列分组。
  12. 一种通信装置，包括：
    分组确定单元，配置来根据移动台的参考信号接收功率，确定所述移动台所属的用户分组；以及
    调整单元，配置来根据所确定的用户分组在接收端的接收功率对所述移动台的发射功率进行调整。
  13. 如权利要求12所述的通信装置，其中
    所述分组确定单元根据所述移动台的参考信号接收功率确定所述移动台的路径损耗，以及根据所述路径损耗确定所述移动台所属的用户分组。
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