WO2016011651A1 - 一种信息传输方法、装置、基站及用户设备 - Google Patents

一种信息传输方法、装置、基站及用户设备 Download PDF

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Publication number
WO2016011651A1
WO2016011651A1 PCT/CN2014/082979 CN2014082979W WO2016011651A1 WO 2016011651 A1 WO2016011651 A1 WO 2016011651A1 CN 2014082979 W CN2014082979 W CN 2014082979W WO 2016011651 A1 WO2016011651 A1 WO 2016011651A1
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WO
WIPO (PCT)
Prior art keywords
cell
channel
common signal
precoding
base station
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PCT/CN2014/082979
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English (en)
French (fr)
Inventor
唐小勇
邱晶
李铕
王晓娜
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/082979 priority Critical patent/WO2016011651A1/zh
Publication of WO2016011651A1 publication Critical patent/WO2016011651A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an information transmission method, apparatus, base station, and user equipment. Background technique
  • Massive MIM0 Massive Multiple-Input Multiple-Output
  • its high gain, low data transmission power, etc. significantly improve system capacity and reduce power consumption. Wide attention;
  • the number of antennas of base stations has also increased, and the number of TRX channels has also multiplied, resulting in high cost and difficulty in achieving RF front-end.
  • the hardware cost In order to simplify the complexity of the RF front-end design in the Massive MIMO system and reduce the hardware cost, only reduce the channel's power amplifier level, reduce the channel's hardware performance requirements, and remove or use the graded device to achieve low cost and high reliability.
  • RF front-end design In order to simplify the complexity of the RF front-end design in the Massive MIMO system and reduce the hardware cost, only reduce the channel's power amplifier level, reduce the channel's hardware performance requirements, and remove or use the graded device to achieve low cost and high reliability.
  • the TRX channel power should be reduced while satisfying the link budget of the cell coverage, that is, the link budget is satisfied. Reduce the transmit power level of the antenna TRX channel on the premise of the condition. In order to reduce the transmission power of the base station, it is necessary to use the UE-Specific precoding technique to weight all downlink transmission channels (including the common control channel and the data transmission channel) to obtain the Precoding gain.
  • the inventors of the present invention found that in implementing the UE-Specific Precoding algorithm, the base station needs to acquire downlink channel information, and before the user equipment (UE) establishes a connection with the base station.
  • the base station cannot acquire any channel state information (CSI) related to the UE. Therefore, the UE-Specific precoding technique cannot be used to reduce the transmission power of the common control channel.
  • CSI channel state information
  • An embodiment of the present invention provides an information transmission method, apparatus, base station, and user equipment, to solve the technical problem in the prior art that the UE-Specific technology cannot be used to reduce the transmission power of a common control channel.
  • the first aspect provides an information transmission apparatus, including: [08] a first weighting processing unit, configured to perform precoding weighting processing on the common signal of the cell by using the set codebook;
  • a first sending unit configured to send the cell common signal after the precoding weighting process to the user equipment UE;
  • a receiving unit configured to receive channel state information CSI of an uplink channel sent by the UE;
  • a determining unit configured to determine, according to the CSI, a precoding weight of the downlink channel;
  • a second weighting processing unit configured to perform precoding weighting processing on the downlink signal by using the precoding weight
  • the second sending unit is configured to send the downlink signal after the precoding weighting process to the UE.
  • the first sending unit is configured to periodically send, by using one of a frequency division method, a time division manner, a code division manner, and a space division manner, the common signal of the cell after the precoding weighting process to one or more modes of the frequency division method, The UE.
  • the first weight processing unit is specifically configured to use multiple configured
  • the codebook performs precoding weighting processing on the common signal of the cell, and in the precoding weighting process, the equivalent beam direction formed by each codebook is for a user equipment of a specific channel; the specific channel is a channel for each codebook pair a channel corresponding to the quantized information; [17] wherein different codebooks in the plurality of codebooks use one or more of frequency division multiple access, time division multiple access, spatial division multiple access, and code division multiple access
  • the combination of multiple access methods performs precoding weighting on the cell common signal.
  • the second aspect provides an information transmission device, including:
  • a receiving unit configured to receive a cell common signal sent by the base station, where the cell common signal is a signal that is performed by the base station by using a set codebook to perform precoding weighting processing;
  • a detecting unit configured to perform random After accessing the base station, performing channel quality detection on the uplink channel to obtain channel state information CSI of the uplink channel;
  • a sending unit configured to send the CSI to the base station.
  • the third aspect provides a base station, including:
  • a processor configured to perform a precoding weighting process on the common signal of the cell by using the set codebook
  • a transceiver configured to send the common signal of the cell after the precoding weighting process to the user equipment UE; And receiving channel state information CSI of the uplink channel sent by the UE;
  • the processor is further configured to determine a precoding weight of the downlink channel according to the CSI, and use the pre Encoding weights precoding weighting processing on the downlink signal;
  • the transceiver is further configured to send the downlink signal that is precoded and weighted to the UE.
  • the transceiver sends the pre-coding weighted cell common signal to the user equipment UE, where the method includes: The public signal is periodically sent to the above by one or more of a frequency division method, a time division method, a code division method, and a space division method.
  • the processor performing precoding weighting processing on the common cell signal by using the set codebook includes: Performing precoding weighting processing on the common signal of the cell by using the set multiple codebooks, and in the precoding weighting processing, the equivalent beam direction formed by each codebook is directed to the user equipment of the specific channel; the specific channel is a channel corresponding to each channelbook that quantizes channel information;
  • different codebooks in the plurality of codebooks use one or more multiple access methods of frequency division multiple access, time division multiple access, spatial division multiple access, and code division multiple access to perform cell common signals. Precoding weighting processing.
  • the fourth aspect provides a user equipment, including: [31] a transceiver, configured to receive a cell common signal sent by a base station, where the common signal of the cell is pre-coded by the base station by using a set codebook. Processed signal;
  • a processor configured to perform channel quality detection on the uplink channel after obtaining the random access to the base station, to obtain channel state information CSI of the uplink channel;
  • the transceiver is further configured to send the CSI to the base station.
  • the fifth aspect provides an information transmission method, including:
  • the cell that is subjected to precoding weighting processing The public signal is sent to the user equipment UE, including:
  • the common signal of the cell after the precoding weighting process is periodically sent to the UE in one or more manners of a frequency division manner, a time division manner, a code division, and a spatial division manner.
  • the performing, by using the set codebook, the precoding weighting process on the common signal of the cell specifically includes: Performing precoding weighting processing on the common signal of the cell by using the set multiple codebooks, and in the precoding weighting processing, the equivalent beam direction formed by each codebook is directed to the user equipment of the specific channel; the specific channel is a channel corresponding to each channelbook that quantizes channel information;
  • different codebooks in the plurality of codebooks use one or more multiple access methods of frequency division multiple access, time division multiple access, spatial division multiple access, and code division multiple access to perform cell common signals. Precoding weighting processing.
  • the sixth aspect provides an information transmission method, including:
  • the base station before the UE accesses the network, the base station performs precoding weighting processing on the common signal of the cell by using the set codebook, and after the UE accesses the network, the base station The precoding weights of the downlink channel are calculated according to the CSI that receives the UE feedback uplink channel, and precoding weighting processing is performed on all the downlink signals that are transmitted by using the precoding weights. That is, before the UE accesses, the base station uses the coding gain to reduce the transmission power of the common control channel of the base station.
  • FIG. 1 is a schematic structural diagram of an information transmission apparatus according to an embodiment of the present disclosure
  • 2A is a schematic diagram of periodically transmitting a cell common signal weighted by multiple codebooks by using a frequency division method according to an embodiment of the present invention
  • FIG. 2B is a schematic diagram of cell coverage of a cell common signal for performing precoding weighting processing using multiple codebooks according to a frequency division manner according to an embodiment of the present invention
  • FIG. 3A is a schematic diagram of periodically transmitting a cell common signal weighted by multiple codebooks by using a time division method according to an embodiment of the present invention
  • FIG. 3B is a schematic diagram of cell coverage of a cell common signal transmitted by using a plurality of codebooks for precoding weighting according to an embodiment of the present invention
  • 4A is a schematic diagram of periodically transmitting a cell common signal weighted by multiple codebooks by using a code division/space division method according to an embodiment of the present invention
  • 4B is a schematic diagram of cell coverage of a cell common signal transmitted by using a plurality of codebooks for precoding weighting according to a code division/space division method according to an embodiment of the present invention
  • FIG. 5 is another schematic structural diagram of an information transmission apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 8 is a flowchart of a method for transmitting information according to an embodiment of the present invention.
  • FIG. 9 is another flowchart of a method for transmitting information according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of an application example of an information transmission method according to an embodiment of the present invention. detailed description
  • the CSI can only be obtained during the process of the UE sending the SRS, therefore, therefore, The station cannot implement the UE-Specific precoding technique, that is, the UE-Specific precoding technique cannot be utilized to reduce the transmission power of the common control channel.
  • an embodiment of the present invention provides an information transmission method and apparatus, before the user equipment (UE) accesses the network side, Performing precoding (precoding) weighting processing on the transmitted uplink common signal by using the set codebook; and determining the precoding weight of the downlink channel according to channel state information (CSI) of the uplink channel fed back by the UE after the UE accesses the network And performing precoding (Precoding) weighting processing on the transmitted downlink signal by using the precoding weight.
  • CSI channel state information
  • Precoding precoding
  • the apparatus includes: a first weighting processing unit 11, a first sending unit 12, a receiving unit 13, and a determining unit. 14.
  • the first weighting processing unit 11 is configured to perform precoding weighting processing on the common channel of the cell by using the set codebook; [69] In this embodiment, the first weighting processing unit 11 first utilizes the user.
  • the method of spatial channel information quantization is used to design a codebook. The specific process of designing the codebook is well known to those skilled in the art and will not be described herein.
  • the first weighting processing unit 11 performs precoding weighting processing on the cell common signal to be transmitted by the codebook.
  • the precoding weighting process in this embodiment performs precoding weighting processing in a UE-Specific manner.
  • the codebook is the quantization of the channel information.
  • the codebook is used for precoding weighting on the common signal of the cell, the equivalent beam direction formed by each codebook can only be directed to the user of the specific channel.
  • the specific channel is a channel corresponding to the channel information quantized by each codebook.
  • the embodiment of the present invention provides one or more of using multiple different codebooks using frequency division multiple access, time division multiple access, space division multiple access, and code division multiple access.
  • the combination of multiple access methods performs precoding weighting on the common signal of the cell to realize user access and measurement.
  • the first sending unit 12 is configured to send the common signal of the cell after the precoding weighting process to the user equipment UE;
  • the first sending unit 12 pre-codes the weighted processed cell common signal by the first weighting processing unit 11. The number is sent to the UE through the cell common channel.
  • the common signal of the cell after performing the precoding weighting process by using the codebook may be sent to the UE by using multiple types.
  • the following sending manners are used as an example, but are not limited thereto;
  • the first transmission mode is: periodically transmitting a cell common signal that is precoded by using multiple codebooks to the UE by using frequency division;
  • FIG. 2A is a schematic diagram of periodically transmitting a cell common signal weighted by using multiple codebooks by using a frequency division method according to an embodiment of the present invention.
  • the coverage of the entire cell is specifically: sending, on the carrier frequency fl, a cell common signal that is subjected to precoding weighting processing by using the codebook 1, and the coverage area is the first area in FIG. 2B (ie, the area corresponding to fl);
  • the cell common signal for performing precoding weighting processing by using the codebook 2 is transmitted on the frequency of 2, and the coverage area is the second area in FIG.
  • the cell common signal of the weighting process is a third area in FIG. 2A (ie, a region corresponding to ⁇ ); a cell common signal for performing precoding weighting processing using the codebook 4 is transmitted at the carrier frequency f4, and the coverage area thereof is FIG. 2B.
  • the fourth area ie, the area corresponding to f4, and so on, to implement different basic codebooks on different carrier frequencies or RBGs to implement the entire cell Cover, thereby achieving user's access request.
  • the second transmission mode is: periodically transmitting a cell common signal using a plurality of codebooks to the UE in a time division manner;
  • FIG. 3A is a schematic diagram of periodically transmitting a common signal of a cell weighted by using multiple codebooks by using a time division method according to an embodiment of the present invention. .
  • the coverage of the entire cell is implemented by using a beam scanning method formed by the codebook.
  • the cell common signal that performs precoding weighting processing by using the codebook 1 is sent at time t1, and the coverage area is the first area in FIG. 3B (ie, corresponding to tl).
  • the cell common signal for performing precoding weighting processing by using codebook 2 is transmitted, and the coverage area is the second area in FIG.
  • the processed cell common signal whose coverage area is the third area in FIG. 3B (ie, the area corresponding to t3); the time t4 transmits the cell common signal that is precoded by the codebook 4, and the coverage area is the fourth in FIG. 3B.
  • the area that is, the area corresponding to t4), and so on, is used to implement the coverage of the entire cell by transmitting different codebooks at different times, thereby realizing the access requirements of the user.
  • the third transmission mode is: the cell common signal that performs coding weighting processing by using multiple codebooks is periodically sent to the UE by using a code division or a space division manner;
  • FIG. 4A is a schematic diagram of using a code division/space division method to periodically transmit and use multiple codebook weights according to an embodiment of the present invention. Schematic diagram of the community common signal.
  • a cell coverage diagram of a cell common signal for performing precoding weighting processing using multiple codebooks based on a code division/space division method As shown in FIG. 4B, in FIG. 4B, the degree of freedom of spatial domain resources may also be utilized.
  • the common signal of the precoding weighted cell is simultaneously sent to the cell with different coverage area characteristics, so as to achieve coverage of the entire cell, specifically: simultaneously transmitting the codebook 1, the codebook 2, the codebook 3, and the codebook 4 a common cell signal of the precoding weighting process, wherein the codebook 1 coverage area is the first area in FIG. 4B; the codebook 2 coverage area is the second area in FIG. 4B; and the codebook 3 coverage area is the third area in FIG. 4B;
  • the coverage area of the codebook 4 is the fourth area in FIG. 4B, and so on, different codebooks are transmitted at different times to achieve coverage of the entire cell, thereby realizing the access requirements of the user.
  • the manner of transmitting the common signal of the cell may also be a combination of the foregoing manners, which is not limited in this embodiment.
  • the receiving unit 13 is configured to receive channel state information CSI of an uplink channel sent by the UE;
  • the first sending unit 12 sends the cell common signal that is pre-coded and weighted by the first weighting processing unit 11 to the UE through the cell common channel, so that the UE performs the channel quality detection, and the detected The common signal of the cell, and when the detection result satisfies the access condition, the UE randomly accesses the network, and then the UE performs data interaction with the base station on the network side. During the interaction, the UE acquires the channel state information of the uplink channel. After the CSI, the UE sends the CSI of the uplink channel to the base station periodically or periodically, that is, the receiving unit 13 in the base station receives the channel state information CSI of the uplink channel sent by the UE.
  • the determining unit 14 is configured to determine a precoding weight of the downlink channel according to the CSI
  • the precoding weight of the downlink channel is calculated according to the CSI, and the calculation method is well known to those skilled in the art, and is no longer used herein. Narration.
  • the second weighting processing unit 15 is configured to perform precoding and weighting processing on the downlink signal by using the precoding weight
  • the second sending unit 16 configured to send the downlink signal after the precoding weighting process to the
  • the transmission mode of the downlink signal sent by the precoding weighting process to the UE may be one or more of a frequency division method, a time division method, a space division method, and a code division method. It may be other multiple access methods or a combination thereof, and the embodiment is not limited.
  • the base station before the UE accesses the network, the base station performs precoding weighting processing on the common signal of the cell by using the set codebook, and after receiving the uplink CSI of the uplink channel by the UE after the UE accesses the network.
  • the precoding weights of the downlink channel are calculated, and precoding weighting processing is performed on all downlink signals by using precoding weights.
  • the base station uses the coding gain to reduce the transmission power of the common control channel, thereby reducing the overall power consumption of the base station.
  • the information transmission apparatus includes: a receiving unit 51, a detecting unit 52, and a transmitting unit 53, wherein
  • the receiving unit 51 is configured to receive a cell common signal sent by the base station, where the cell common signal is a pre-coded weighting process using the set codebook;
  • the detecting unit 52 is configured to: after randomly accessing the base station, perform channel quality detection on the uplink channel, to obtain channel state information CSI of the uplink channel;
  • the sending unit 53 is configured to send the CSI to the base station, so that the base station determines a precoding weight of a downlink channel.
  • the device when detecting the common signal of the cell sent by the base station when performing channel quality detection, if the common signal of the cell satisfies the access condition, the device initiates a random access process. After the device is connected to the network, the device performs information exchange with the base station on the network side. During the interaction, the device acquires the CSI of the uplink channel, and then the device acquires the periodic or periodic period. The CSI of the uplink channel is sent to the base station, so that the base station calculates the precoding weight of the downlink channel according to the CSI of the received uplink channel.
  • the base station 6 includes a processor 61 and a transceiver 62, where
  • the processor 61 is configured to perform precoding weighting processing on the cell common signal by using the set codebook
  • the transceiver 62 is configured to send the cell common signal of the precoding weighting process to the user equipment UE; and receive channel state information CSI of the uplink channel sent by the UE;
  • the processor 61 is further configured to determine a precoding weight of the downlink channel according to the CSI, and perform precoding weighting processing on the downlink signal by using the precoding weight;
  • the transceiver 62 is further configured to send the downlink signal after the precoding weighting process to the UE.
  • the transceiver sends the pre-coding weighted cell common signal to the user equipment UE, where the method includes: using the frequency division method of the common signal of the cell after precoding weighting processing
  • the time division mode, the code division method, or the space division mode is periodically sent to the UE.
  • any combination of the frequency division mode, the time division mode, the code division mode, and the space division mode may be periodically sent to the UE.
  • the processor performs precoding weighting processing on the cell common signal by using the set codebook, and: performing precoding weighting processing on the cell common signal by using the set multiple codebooks, and
  • the equivalent beam direction formed by each codebook is for a user equipment of a specific channel; the specific channel is a channel corresponding to the channel information quantized by each codebook;
  • the different codebooks in the codebooks perform precoding weighting processing on the cell common signals using one or more of the frequency division multiple access, time division multiple access, spatial division multiple access, and code division multiple access.
  • the base station before the UE accesses the network, the base station performs precoding weighting processing on the common signal of the cell by using the set codebook, and after the UE accesses the network, the base station feeds back the uplink channel according to the received UE.
  • CSI The precoding weights of the downlink channel are calculated, and the precoding weighting process is performed on all downlink signals passing the downlink channel by using the precoding weights. In order to reduce the transmission power of the base station by coding gain, thereby reducing the overall power consumption of the base station.
  • the user equipment 7 includes: a transceiver 71 and a processor 72.
  • the transceiver 71 is configured to receive a cell common signal sent by the base station, where the cell common signal is a signal that is performed by the base station by using a preset codebook to perform precoding weighting processing;
  • the processor 72 is configured to perform channel quality detection on the uplink channel after obtaining the random access to the base station, to obtain channel state information CSI of the uplink channel, and [114] the transceiver 71, And sending the CSI to the base station, so that the base station determines a precoding weight of the downlink channel.
  • the user equipment before the UE accesses the network, receives the common signal of the cell after performing precoding weighting processing by using the set codebook sent by the base station, and after the UE accesses the network,
  • the CSI of the uplink channel is fed back to the base station, so that the base station calculates the precoding weight of the downlink channel according to the CSI that receives the UE feedback uplink channel, and uses the precoding weight to precode all the downlink signals that pass the downlink channel. Weighted processing.
  • the overall power consumption of the base station is reduced.
  • an embodiment of the present invention further provides an information transmission method, and a flowchart thereof is shown in FIG. 8.
  • the method includes:
  • Step 801 Perform precoding weighting processing on the common signal of the cell by using the set codebook; [118] Before the step, the base station first uses the method of user space channel information quantization to design the codebook, and the process of designing the codebook It is well known to those skilled in the art and will not be described herein.
  • Step 802 The precoding weighting process of the cell common signal is sent to the user equipment UE;
  • the base station may send the public signal of the cell in multiple manners.
  • the base station may send the last name to the UE by using a frequency division manner, a time division manner, a code division or a space division manner; Any combination of the methods, etc., of course, other multiple access methods can also be used.
  • the process of transmitting the common signal of the cell by means of frequency division, time division, code division or space division is described in detail above, and details are not described herein again.
  • the UE After detecting the common signal of the cell sent by the base station, if the UE meets the access condition, the UE initiates a random access procedure, and after the UE randomly accesses, the UE and the base station may perform information transmission, and then, The UE performs channel quality detection on the uplink channel, and sends the CSI of the uplink channel to the base station, so that the base station calculates the precoding weight of the downlink channel according to the CSI of the uplink channel, thereby facilitating transmission of the downlink signal.
  • Step 803 Receive channel state information CSI of the uplink channel sent by the UE;
  • Step 804 Determine a precoding weight of the downlink channel according to the CSI
  • Step 805 Perform precoding weighting processing on the downlink signal by using the precoding weight
  • the base station may perform precoding weighting processing on all or part of the downlink signals by using a precoding weight in a UE-Specific manner, and the specific precoding weighting processing procedure is well known to those skilled in the art. Technology, no longer repeat here.
  • Step 806 Send the downlink signal after the precoding weighting process to the UE.
  • the downlink signal sent by the base station after the precoding weighting process may adopt multiple multiple access methods such as frequency division mode, time division mode, code division and/or space division mode.
  • the base station before the UE accesses the network, performs precoding weighting processing on the common signal of the cell by using the set codebook, and after receiving the uplink CSI of the uplink channel by the UE after the UE accesses the network.
  • the precoding weights of the downlink channel are calculated, and precoding weighting processing is performed on all downlink signals by using precoding weights.
  • the base station uses the coding gain to reduce the transmission power of the common control channel, thereby reducing the overall power consumption of the base station.
  • An embodiment of the present invention further provides an information transmission method, and a flowchart thereof is shown in FIG. 9.
  • the method includes:
  • Step 901 Receive a cell common signal sent by the base station, where the cell common signal is a signal that the base station performs precoding weighting processing by using the set codebook;
  • the UE performs channel quality detection when receiving the common cell signal sent by the base station, and the UE performs a random access procedure when the detection result satisfies the access condition.
  • Step 902 After randomly accessing the base station, perform channel quality detection on the uplink channel, and obtain a solution.
  • the UE After the UE randomly accesses the network, the UE performs information exchange with the base station on the network side. During the interaction, the UE acquires the CSI of the uplink channel.
  • Step 903 Send the CSI to the base station, so that the base station determines a precoding weight of the downlink channel.
  • the UE sends the acquired CSI of the uplink channel to the base station periodically or periodically, so that the base station calculates the precoding weight of the downlink channel according to the CSI of the received uplink channel, and uses the precoding weight pair to transmit.
  • the downlink signal is subjected to precoding weighting processing.
  • the UE before the UE accesses the network, the UE receives the common signal of the cell that performs precoding weighting processing by using the set codebook, and then the UE obtains the uplink after randomly accessing the network.
  • the CSI of the channel is sent to the base station, so that the base station calculates the precoding weight of the downlink channel according to the CSI that receives the UE feedback uplink channel, and performs precoding weighting processing on all downlink signals that pass the downlink channel by using the precoding weight.
  • the overall power consumption of the base station is reduced.
  • FIG. 10 is a flowchart of an application example of an information transmission method according to an embodiment of the present disclosure, which specifically includes:
  • Step 101 The base station designs a codebook codebook by using a method for quantifying user space channel information
  • Step 102 The base station performs precoding weighting processing on the common signal of the cell by using the codebook
  • the codebook is the quantization of the channel information
  • the codebook performs precoding weighting on the common channel/signal of the cell
  • the equivalent beam direction formed by each codebook can only be directed to the user of the specific channel.
  • users can access and measure by using a combination of frequency division, time division, space division, code division or arbitrary multiple access methods.
  • Step 103 The base station sends the cell common signal after the precoding weighting process by using a downlink common control channel.
  • the cell common signal is periodically transmitted in a time division manner, a code division manner, or a spatial division manner.
  • the foregoing manner may also be combined to transmit.
  • Step 104 The UE performs channel quality measurement when receiving the common signal of the cell sent by the base station.
  • Step 105 The UE completes the random access procedure;
  • step 102 and step 105 in the process of accessing the network or accessing the network, all downlink common signals passing through the downlink transmission channel are precoded and weighted by the codebook.
  • Step 106 After the UE accesses the base station, the UE acquires the CSI of the uplink channel. [151] That is, after the UE accesses the base station, the UE can perform information interaction with the base station; and during the interaction, The UE acquires the CSI of the uplink channel.
  • Step 107 The UE sends the CSI of the uplink channel to the base station;
  • Step 108 The base station calculates a precoding weight of the downlink channel according to the CSI; [154] wherein the calculation method is in the field The skilled person is already well-known in the art and will not be described here.
  • Step 109 The base station performs precoding authentication processing on the downlink signal by using a precoding weight;
  • Step 110 The base station sends the downlink signal of the precoding authentication process to the UE by using a downlink channel.
  • the downlink information includes the control channel and the data transmission channel. Of course, other downlink channels may be included, which is not limited in this embodiment.
  • step 109 and step 110 after the UR accesses the network, all downlink signals passing through the downlink channel are precoded and authenticated using precoding weights.
  • the base station before the UE accesses the network, the base station performs precoding weighting processing on the cell common signal of the common channel of the cell by using the set codebook, and then, after the UE randomly accesses the network, and Transmitting the CSI of the obtained uplink channel to the base station, the base station calculates the precoding weight of the downlink channel according to the CSI of the uplink channel, and performs precoding weighting on all the downlink signals that pass the downlink channel by using the precoding weight. deal with.
  • the coding power is reduced to reduce the base station's transmit power, thereby reducing the overall power consumption of the base station.
  • first, second, third, etc. may be used to describe various information in the embodiments of the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • first information may also be referred to as the second information without departing from the scope of the embodiments of the present invention.
  • second information may also be referred to as first information.
  • word "if” as used herein may be interpreted as "when” or "when” or "in response to certainty.”
  • the UE may be any one of the following, and may be static or mobile.
  • the static UE may specifically be a terminal (mobile station) user unit ( Subscriber unit or station, etc.
  • the mobile UE may specifically include a cellular phone, a personal digital assistant (PDA), a modem, a wireless communication device, a handheld device, a laptop computer ( The laptop computer ), the cordless phone, or the wireless local loop (WLL) station, etc., may be distributed throughout the wireless network.
  • PDA personal digital assistant
  • WLL wireless local loop
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. , an 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 or portions of the embodiments.
  • a computer device which may be a personal computer, server, or network device, etc.

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Abstract

本发明实施例提供提出一种信息传输方法、装置、基站及用户设备,所述传输方法包括:利用设定的码本对小区公共信号进行预编码加权处理;将预编码加权处理后的所述小区公共信号发送给用户设备UE;接收所述UE发送的上行信道的信道状态信息CSI;根据所述CSI确定下行信道的预编码权值;利用所述预编码权值对下行信号进行预编码加权处理;将预编码加权处理后的所述下行信号发送给所述UE。本发明实施例以解决现有技术中,由于无法利用UE-Specific技术降低公共控制信道的发射功率的技术问题。

Description

一种信息传输方法、 装置、 基站及用户设备 技术领域
[01] 本发明涉及通信技术领域, 特别涉及一种信息传输方法、 装置、 基站及用户设 备。 背景技术
[02] 随着大规模多输入输出 ( Massive MIM0, Massive Multiple-Input Multiple-Output ) 技术被广泛研究, 其带来的高增益、 低数据传输功率等显著提升 系统容量、 降低功耗等特点被广泛关注; 但随着 Massive MIM0的应用, 基站的天线 数目也随着增多, TRX通道数也成倍增加, 导致射频前端成本高、 难以实现。 [03] 为了简化 Massive MIMO系统中射频前端设计的复杂度、 降低硬件成本, 只有通 过减少通道的功放等级, 降低通道对硬件性能的需求, 去掉或者利用 ΠΜ级的器件以 实现低成本、 高可靠的射频前端设计。在降低 TRX通道功率的同时, 为了满足公共信 道的覆盖范围,保证小区边缘用户正常接入, 因此在减少 TRX通道功率的同时应满足 小区覆盖的链路预算, 也就是说,在满足链路预算条件的前提下降低天线 TRX通道的 发送功率等级。而为了降低基站的发送功率, 需要利用 UE-Specific预编码技术加权 所有下行传输信道 (包括公共控制信道与数据传输信道) 以获取 Precoding增益。
[04] 在对现有技术的研究和实践过程中,本发明的发明人发现,在实现 UE-Specific Precoding算法中, 基站需要获取下行信道信息, 而在用户设备 (UE ) 与基站建立连 接之前, 基站无法获取和 UE 相关的任何信道状态信息(CSI, channel state information ) , 因此,无法利用 UE-Specific预编码技术降低公共控制信道的发射功 率。 发明内容
[05] 本发明实施例中提供了一种信息传输方法、 装置、 基站及用户设备, 以解决现 有技术中,由于无法利用 UE-Specific技术来降低公共控制信道的发射功率的技术问 题。
[06] 为了解决上述技术问题, 本发明实施例公开了如下技术方案: [07] 第一方面提供了一种信息传输装置, 包括: [08] 第一加权处理单元,用于利用设定的码本对小区公共信号进行预编码加权处理;
[09] 第一发送单元, 用于将预编码加权处理后的所述小区公共信号发送给用户设备 UE;
[10] 接收单元, 用于接收所述 UE发送的上行信道的信道状态信息 CSI; [11] 确定单元, 用于根据所述 CSI确定下行信道的预编码权值;
[12] 第二加权处理单元,用于利用所述预编码权值对下行信号进行预编码加权处理;
[13] 第二发送单元, 用于将预编码加权处理后的所述下行信号发送给所述 UE。
[14] 结合第一方面或第一方面第一种可能的实现方式,在第二种可能的实现方式中,
[15] , 第一发送单元, 具体用于将预编码加权处理后的所述小区公共信号采用频分 方式、 时分方式、 码分方式和空分方式的一种或多种方式周期性发送给所述 UE。
[16] 结合第一方面或第一方面第一种或第二种可能的实现方式, 在第三种可能的实 现方式中,所述第一加权处理单元, 具体用于利用设定的多个码本对小区公共信号进 行预编码加权处理, 并在所述预编码加权处理时, 每个码本形成的等效波束方向针对 特定信道的用户设备; 所述特定信道为每个码本对信道信息进行量化后对应的信道; [17] 其中, 所述多个码本中的不同码本使用频分多址、 时分多址、 空分多址和码分 多址中的一种或多种多址方式的组合对小区公共信号进行预编码加权处理。
[18] 第二方面提供了一种信息传输装置, 包括:
[19] 接收单元, 用于接收基站发送的小区公共信号, 所述小区公共信号是所述基站 利用设定的码本进行预编码加权处理后的信号; [20] 检测单元, 用于在随机接入到所述基站后, 对上行信道进行信道质量检测, 得 到所述上行信道的信道状态信息 CSI;
[21] 发送单元, 用于将所述 CSI发送给所述基站。
[22] 第三方面提供了一种基站, 包括:
[23] 处理器, 用于利用设定的码本对小区公共信号进行预编码加权处理; [24] 收发器, 用于将预编码加权处理后的所述小区公共信号发送给用户设备 UE; 并 接收所述 UE发送的上行信道的信道状态信息 CSI;
[25] 所述处理器, 还用于根据所述 CSI确定下行信道的预编码权值, 并利用所述预 编码权值对下行信号进行预编码加权处理;
[26] 所述收发器, 还用于将预编码加权处理后的所述下行信号发送给所述 UE。
[27] 在第三方面的第一种可能的实现方式中, 所述收发器将预编码加权处理后的小 区公共信号发送给用户设备 UE, 具体包括: 将预编码加权处理后的所述小区公共信 号采用频分方式、 时分方式、 码分和空分方式的一种或多种方式周期性发送给所述
[28] 结合第一方面或第一方面第一种可能的实现方式,在第二种可能的实现方式中, 所述处理器利用设定的码本对小区公共信号进行预编码加权处理包括:利用设定的多 个码本对小区公共信号进行预编码加权处理, 并在所述预编码加权处理时, 每个码本 形成的等效波束方向针对特定信道的用户设备;所述特定信道为每个码本对信道信息 进行量化后对应的信道;
[29] 其中, 所述多个码本中的不同码本使用频分多址、 时分多址、 空分多址和码分 多址中的一种或多种多址方式对小区公共信号进行预编码加权处理。
[30] 第四方面提供了一种用户设备, 包括: [31] 收发器, 用于接收基站发送的小区公共信号, 所述小区公共信号是所述基站利 用设定的码本进行预编码加权处理后的信号;
[32] 处理器, 用于在随机接入到所述基站后, 对上行信道进行信道质量检测, 得到 所述上行信道的信道状态信息 CSI;
[33] 所述收发器, 还用于将所述 CSI发送给所述基站。
[34] 第五方面提供了一种信息传输方法, 包括:
[35] 利用设定的码本对小区公共信号进行预编码加权处理;
[36] 将预编码加权处理后的所述小区公共信号发送给用户设备 UE;
[37] 接收所述 UE发送的上行信道的信道状态信息 CSI;
[38] 根据所述 CSI确定下行信道的预编码权值;
[39] 利用所述预编码权值对下行信号进行预编码加权处理;
[40] 将预编码加权处理后的所述下行信号发送给所述 UE。
[41] 在第五方面的第一种可能的实现方式中, 所述将预编码加权处理后的所述小区 公共信号发送给用户设备 UE, 包括:
[42] 将预编码加权处理后的所述小区公共信号采用频分方式、 时分方式、 码分和空 分方式的一种或多种方式周期性发送给所述 UE。
[43] 结合第五方面或第五方面第一种可能的实现方式,在第二种可能的实现方式中, 所述利用设定的码本对小区公共信号进行预编码加权处理, 具体包括: 利用设定的多 个码本对小区公共信号进行预编码加权处理, 并在所述预编码加权处理时, 每个码本 形成的等效波束方向针对特定信道的用户设备;所述特定信道为每个码本对信道信息 进行量化后对应的信道;
[44] 其中, 所述多个码本中的不同码本使用频分多址、 时分多址、 空分多址和码分 多址中的一种或多种多址方式对小区公共信号进行预编码加权处理。
[45] 第六方面提供了一种信息传输方法, 包括:
[46] 接收基站发送的小区公共信号, 所述小区公共信号是所述基站利用设定的码本 进行预编码加权处理后的信号;
[47] 在随机接入到所述基站后, 对上行信道进行信道质量检测, 得到所述上行信道 的信道状态信息 CSI;
[48] 将所述 CSI发送给所述基站。
[49] 由上述公开的技术方案可知, 本发明实施例中, 在 UE接入网络前, 基站利用 设定的码本对小区公共信号进行预编码加权处理, 以及在 UE接入网络后, 基站按照 接收到 UE反馈上行信道的 CSI来计算下行信道的预编码权值,并利用预编码权值对 发送的所有下行信号进行预编码加权处理。 也就是说, 在 UE接入前, 基站利用编码 增益来减低基站的公共控制信道的发射功率, 在 UE接入后, 基站通过 UE反馈上行 信道的 CSI计算出下行信道的预编码权值,并利用预编码权值对所有下行信号进行预 编码加权处理, 降低基站的下行信道的功率, 从而降低了基站的整体功耗。 附图说明 [50] 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性的 前提下, 还可以根据这些附图获得其他的附图。 [51] 图 1为本发明实施例提供的一种信息传输装置的结构示意图;
[52] 图 2A为本发明实施例提供的一种采用频分的方式周期发送利用多个码本加权 的小区公共信号的示意图;
[53] 图 2B 为本发明实施例提供的一种基于频分方式发送利用多个码本进行预编码 加权处理的小区公共信号的小区覆盖示意图;
[54] 图 3A为本发明实施例提供的一种采用时分的方式周期发送利用多个码本加权 的小区公共信号的示意图;
[55] 图 3B 为本发明实施例提供的一种基于时分方式发送利用多个码本进行预编码 加权处理的小区公共信号的小区覆盖示意图;
[56] 图 4A为本发明实施例提供的一种采用码分 /空分的方式周期发送利用多个码本 加权的小区公共信号的示意图;
[57] 图 4B为本发明实施例提供的一种基于码分 /空分方式发送利用多个码本进行预 编码加权处理的小区公共信号的小区覆盖示意图;
[58] 图 5为本发明实施例提供的 -种信息传输装置的另一结构示意图;
[59] 图 6为本发明实施例提供的 -种基站的结构示意图;
[60] 图 7为本发明实施例提供的 -种用户设备的结构示意图;
[61] 图 8为本发明实施例提供的 -种信息传输方法的流程图;
[62] 图 9为本发明实施例提供的 -种信息传输方法的另一流程图;
[63] 图 10为本发明实施例提供的-一种信息传输方法的应用实例的流程图。 具体实施方式
[64] 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、 完整的描述, 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。 [65] 在现有实现 UE-Specific Precoding算法中, 基站侧需要获取准确的下行信道信 息, 而对于 UE在与基站建立连接之前, 基站无法获取与 UE相关的任何信道状态信 息 (CSI), 这是应为, 只有在 UE发送 SRS的过程中才能获取 CSI, 因此, 因此, 基 站无法实现 UE-Specific预编码技术,即不能利用 UE-Specific预编码技术来降低公共 控制信道的发射功率。
[66] 基于此, 本发明实施例为了实现利用 UE-Specific预编码技术来降低公共控制信 道的发射功率, 提供了一种信息传输方法及装置, 在用户设备 (UE)接入网络侧前, 利用设定的码本对发射的上行公共信号进行预编码 (Precoding) 加权处理; 并在 UE 接入网络后, 依据 UE反馈的上行信道的信道状态信息 (CSI) 确定下行信道的预编 码权值,并利用所述预编码权值对发射的下行信号进行预编码(Precoding)加权处理。 解决了现有技术方案, 在 UE接入网络前, 无法利用 UE-Specific预编码技术降低公 共控制信道的发射功率的技术问题。 [67] 请参阅图 1, 图 1为本发明实施例提供的一种信息传输装置的结构示意图;所述 装置包括: 第一加权处理单元 11, 第一发送单元 12, 接收单元 13, 确定单元 14, 第 二加权处理单元 15和第二发送单元 16, 其中,
[68] 所述第一加权处理单元 11, 用于利用设定的码本 (codebook) 对小区公共信道 进行预编码加权处理; [69] 该实施例中, 第一加权处理单元 11先利用用户空间信道信息量化的方法来设计 码本, 其设计码本的具体过程对于本领域技术人员来说, 已是熟知技术, 在此不再赘 述。
[70] 然后, 在 UE接入网络前, 第一加权处理单元 11利用该码本对待发射的小区公 共信号进行预编码加权处理。其中,本实施例中的预编码加权处理为采用 UE-Specific 方式进行预编码 (precoding) 加权处理。
[71] 其中, 码本 (codebook) 是对信道信息的量化, 用 codebook对小区公共信号进 行 precoding加权处理时, 每个码本形成的等效波束方向只能针对特定信道的用户。 所述特定信道为每个码本对信道信息进行量化后对应的信道。
[72] 为了让尽可能多的用户接入系统, 本发明实施例提供了采用多个不同码本使用 频分多址、 时分多址、 空分多址、码分多址的一种或多种多址方式的组合对小区公共 信号进行预编码加权处理, 实现用户的接入和测量。
[73] 所述第一发送单元 12, 用于将预编码加权处理后的所述小区公共信号发送给用 户设备 UE;
[74] 第一发送单元 12将所述第一加权处理单元 11预编码加权处理后的小区公共信 号通过小区公共信道发送给 UE。
[75] 可选的, 本实施例中, 利用码本进行预编码加权处理后的小区公共信号可以通 过多种发送给 UE, 下面以下述几种发送方式为例, 但并不限于此;
[76] 第一种发送方式为: 将利用多个码本进行预编码加权的小区公共信号采用频分 的方式周期性发送给 UE;
[77] 也就是说,采用不用的码本对不同频率上的小区公共信号进行预编码加权处理, 然后采用频分方式周期性发射所述小区公共信号, 也就是说,在同一时间的不同的频 率上周期性发射预编码加权处理的小区公共信号, 具体如图 2A所示, 图 2A为本发 明实施例提供的一种采用频分的方式周期发送利用多个码本加权的小区公共信号的 示意图。
[78] 基于频分方式发送利用多个码本进行预编码加权处理的小区公共信号的小区覆 盖示意图, 如图 2B所示, 在图 2B中, 是利用 OFDM系统频域资源提供的自由度, 实现对整个小区的覆盖, 具体为: 在载频 fl上发送利用码本 1进行预编码加权处理 的小区公共信号, 其覆盖区域为图 2B中第一区域(即 fl对应的区域); 在载频 £2上 发送利用码本 2进行预编码加权处理的小区公共信号, 其覆盖区域为图 2B中第二区 域 (即 £2对应的区域); 在载频 β发送利用码本 3进行预编码加权处理的小区公共 信号, 其覆盖区域为图 2Β中第三区域(即 β对应的区域); 在载频 f4发送利用码本 4进行预编码加权处理的小区公共信号, 其覆盖区域为图 2B中第四区域(即 f4对应 的区域),依此类推, 以实现利用在不同的载频或者 RBG上发送不同的码本以实现对 整个小区的覆盖, 从而实现用户的接入请求。
[79] 第二种发送方式为: 将利用多个码本进行编码加权处理的小区公共信号采用时 分的方式周期性发送给 UE;
[80] 该方式中,采用不用的码本对不同时域上的小区公共信号进行预编码加权处理, 然后采用时分方式周期性发射所述小区公共信号, 也就是说,在同一时间的不同的频 率上周期性发射预编码加权处理的小区公共信号, 具体如图 3A所示, 图 3A为本发 明实施例提供的一种采用时分的方式周期发送利用多个码本加权的小区公共信号的 示意图。
[81] 基于时分方式发送利用多个码本进行预编码加权处理的小区公共信号的小区覆 盖示意图, 如图 3B所示, 在图 3B中, 同样可以利用用户接入时间不同的自由度, 通过码本形成的波束扫描方式实现对整个小区的覆盖, 具体为: 在时刻 tl 发送利用 码本 1进行预编码加权处理的小区公共信号, 其覆盖区域为图 3B中第一区域 (即 tl 对应的区域); 时刻 t2发送利用码本 2进行预编码加权处理的小区公共信号, 其覆盖 区域为图 3B中第二区域 (即 t2对应的区域); 时刻 t3发送利用码本 3进行预编码加 权处理的小区公共信号, 其覆盖区域为图 3B中第三区域 (即 t3对应的区域); 时刻 t4发送利用码本 4进行预编码加权处理的小区公共信号, 其覆盖区域为图 3B中第四 区域(即 t4对应的区域), 依此类推, 以实现利用在不同的时刻发送不同的码本以实 现对整个小区的覆盖, 从而实现用户的接入需求。
[82] 第三种发送方式为: 将利用多个码本进行编码加权处理的小区公共信号采用码 分或空分方式周期性发送给 UE;
[83] 该方式中,采用不用的码本对码域 /空域上的小区公共信号进行预编码加权处理, 然后采用码分 /空分方式周期性发射所述小区公共信号, 也就是说, 同时不同码域周 期性发射预编码加权处理的小区公共信号, 具体如图 4A所示, 图 4A为本发明实施 例提供的一种采用码分 /空分的方式周期发送利用多个码本加权的小区公共信号的示 意图。
[84] 基于码分 /空分方式发送利用多个码本进行预编码加权处理的小区公共信号的小 区覆盖示意图, 如图 4B所示, 在图 4B中, 同样可以利用空域资源的自由度, 将预 编码加权处理的小区公共信号同时发送到具有不同覆盖区域特性的小区上,从而实现 对整个小区的覆盖, 具体为: 同时发送利用码本 1、 码本 2、 码本 3、 码本 4进行预 编码加权处理的小区公共信号, 其中码本 1覆盖区域为图 4B中第一区域; 码本 2覆 盖区域为图 4B中第二区域; 码本 3覆盖区域为图 4B中第三区域; 码本 4覆盖区域 为图 4B中第四区域, 依此类推, 实现了在不同时刻发送不同码本, 以实现对整个小 区的覆盖, 从而实现了用户的接入需求。
[85] 当然, 发送小区公共信号的方式还可以上述几种方式的组合, 本实施例不作限 制。
[86] 所述接收单元 13, 用于接收所述 UE发送的上行信道的信道状态信息 CSI;
[87] 其中, 第一发送单元 12将所述第一加权处理单元 11预编码加权处理后的小区 公共信号通过小区公共信道发送给 UE后, 以便于 UE在进行信道质量检测, 检测到 所述小区公共信号, 并在检测结果满足接入条件时, UE随机接入到网络, 之后, UE 与网路侧的基站进行数据交互, 在交互的过程中, UE获取到上行信道的信道状态信 息 CSI, 之后, UE定期或周期将上行信道的 CSI发送给基站, 即基站中的接收单元 13接收 UE发送的上行信道的信道状态信息 CSI。
[88] 所述确定单元 14, 用于根据所述 CSI确定下行信道的预编码权值;
[89] 其中, 在接收单元 13接收到上行信道的 CSI后, 根据所述 CSI计算下行信道的 预编码权值, 其计算方法对于本领域技术人员来说, 已是熟知技术, 在此不再赘述。
[90] 所述第二加权处理单元 15, 用于利用所述预编码权值对下行信号进行预编码加 权处理;
[91] 其中, 利用所述预编码权值对下行信号进行预编码加权处理的过程, 对于本领 域技术人员来说也是熟知技术, 在此不再赘述。
[92] 所述第二发送单元 16, 用于将预编码加权处理后的所述下行信号发送给所述
[93] 该实施例中, 将预编码加权处理后的下行信号发送给 UE 的发送方式, 可以通 过频分方式、 时分方式、 空分方式和码分方式的一种或多种, 当然, 还可以是其它多 址方式或其组合, 本实施例不作限制。 [94] 本发明实施例中, 在 UE接入网络前, 基站利用设定的码本对小区公共信号进 行预编码加权处理, 以及在 UE接入网络后, 按照接收到 UE反馈上行信道的 CSI来 计算下行信道的预编码权值, 并利用预编码权值对所有下行信号进行预编码加权处 理。 子 UE接入网络前, 基站利用编码增益来减低公共控制信道的发射功率, 从而降 低基站的整体功耗。 [95] 相应的, 本发明实施例还提供的一种信息传输装置, 其结构示意图如图 5所示, 所述信息传输装置包括: 接收单元 51, 检测单元 52和发送单元 53, 其中,
[96] 所述接收单元 51, 用于接收基站发送的小区公共信号, 所述小区公共信号是利 用设定的码本进行预编码加权处理后的信号;
[97] 其中, 利用设定的码本对小区公共信号进行预编码加权处理的过程, 详见上述, 在此不再赘述。
[98] 所述检测单元 52, 用于在随机接入到所述基站后, 对上行信道进行信道质量检 测, 得到所述上行信道的信道状态信息 CSI;
[99] 其中对上行信道进行信道质量检测的过程, 对于本领域已是熟知技术, 在此不 再赘述。
[100]所述发送单元 53, 用于将所述 CSI发送给所述基站, 以便于所述基站确定下行 信道的预编码权值。
[101]也即是说, 本发明实施例中, 在进行信道质量检测时, 检测到基站发送的所述 小区公共信号时, 如果小区公共信号满足接入条件, 所述装置发起随机接入过程, 并 在接入到网络后, 所述装置与网路侧的基站进行信息交互, 在交互的过程中, 所述装 置获取到上行信道的 CSI, 之后, 所述装置定期或周期将获取到的上行信道的 CSI发 送给基站, 以便于基站根据接收到的上行信道的 CSI计算下行信道的预编码权值。
[102]相应的, 本发明实施例还提供的一种基站, 其结构示意图如图 6所示, 所述基 站 6包括处理器 61和收发器 62, 其中,
[103]所述处理器 61, 用于利用设定的码本对小区公共信号进行预编码加权处理;
[104]所述收发器 62, 用于将预编码加权处理后的所述小区公共信号发送给用户设备 UE; 并接收所述 UE发送的上行信道的信道状态信息 CSI;
[105]所述处理器 61, 还用于根据所述 CSI确定下行信道的预编码权值, 并利用所述 预编码权值对下行信号进行预编码加权处理;
[106]所述收发器 62, 还用于将预编码加权处理后的所述下行信号发送给所述 UE。
[107]可选的, 可选的, 所述收发器将预编码加权处理后的小区公共信号发送给用户 设备 UE, 具体包括: 将预编码加权处理后的所述小区公共信号采用频分方式、 时分 方式、码分或空分方式周期性发送给所述 UE, 当然, 还可以是频分方式、 时分方式、 码分方式、 空分方式的任一组合周期性发送给所述 UE。
[108]可选的,所述处理器利用设定的码本对小区公共信号进行预编码加权处理包括: 利用设定的多个码本对小区公共信号进行预编码加权处理,并在所述预编码加权处理 时, 每个码本形成的等效波束方向针对特定信道的用户设备; 所述特定信道为每个码 本对信道信息进行量化后对应的信道; [109]其中, 所述多个码本中的不同码本使用频分多址、 时分多址、 空分多址和码分 多址中的一种或多种多址方式对小区公共信号进行预编码加权处理。
[110]本发明实施例中, 在 UE接入网络前, 基站利用设定的码本对小区公共信号进 行预编码加权处理,以及在 UE接入网络后,基站按照接收到 UE反馈上行信道的 CSI 来计算下行信道的预编码权值,并利用该预编码权值对所有通过下行信道的下行信号 进行预编码加权处理。 以实现通过编码增益来降低基站的发射功率, 从而降低基站的 整体功耗。
[111]相应的, 本发明实施例还提供的一种用户设备, 其结构示意图如图 7所示, 所 述用户设备 7包括: 收发器 71和处理器 72,
[112]所述收发器 71, 用于接收基站发送的小区公共信号, 所述小区公共信号是所述 基站利用设定的码本进行预编码加权处理后的信号;
[113]所述处理器 72,用于在随机接入到所述基站后,对上行信道进行信道质量检测, 得到所述上行信道的信道状态信息 CSI; [114]所述收发器 71, 还用于将所述 CSI发送给所述基站, 以便于所述基站确定下行 信道的预编码权值。
[115]本发明实施例中, 在 UE接入网络前, 用户设备接收基站发送的利用设定的码 本进行预编码加权处理后的对小区公共信号, 以及在 UE接入网络后, 将获取到的上 行信道的 CSI反馈给基站,以便于基站按照接收到 UE反馈上行信道的 CSI来计算下 行信道的预编码权值,并利用该预编码权值对所有通过下行信道的下行信号进行预编 码加权处理。以实现通过编码增益来降低基站的发射功率,从而降低基站的整体功耗。
[116]基于上述实施例, 本发明实施例还提供一种信息传输方法, 其流程图如图 8所 示, 所述方法包括:
[117]步骤 801 : 利用设定的码本对小区公共信号进行预编码加权处理; [118]在步骤之前, 基站先利用用户空间信道信息量化的方法来设计码本, 其设计码 本的过程对于本领域技术人员来说, 已是熟知技术, 在此不再赘述。
[119]之后, 在 UE接入网络之前, 基站利用码本对待通过小区公共控制信道发射的 小区公共信号进行预编码加权处理,其利用码本对小区公共信号进行预编码加权处理 的过程详见上述, 在此不再赘述。 [120]步骤 802: 将预编码加权处理后的所述小区公共信号发送给用户设备 UE;
[121]该步骤中, 基站发送所述小区公共信号的方式有多种, 比如, 基站可以采用频 分的方式、 时分的方式、 码分或空分方式周期姓发送给 UE; 还可以采用上述方式的 任一组合等, 当然, 还可以此采用其他的多址方式。 [122]其采用频分的方式、 时分的方式、 码分或空分方式发送所述小区公共信号的过 程详见上述, 在此不再赘述。
[123] UE在检测到基站发送的所述小区公共信号后, 如果满足接入条件, 则发起随机 接入过程, 并在 UE随机接入后, UE和基站之间可以进行信息传输, 之后, UE对上 行信道进行信道质量检测, 并将获得上行信道的 CSI发送给基站, 以便于基站根据上 行信道的 CSI计算下行信道的预编码权值, 从而便于发射下行信号。
[124]步骤 803 : 接收所述 UE发送的上行信道的信道状态信息 CSI;
[125]步骤 804: 根据所述 CSI确定下行信道的预编码权值;
[126]其中, 基站根据 CSI计算下行信道的预编码权值的过程, 对于本领域技术人员 来说, 已是熟知技术, 在此不再赘述。
[127]步骤 805: 利用所述预编码权值对下行信号进行预编码加权处理;
[128]该步骤中, 基站可以利用预编码权值采用 UE-Specific方式对所有或部分下行信 号进行预编码加权处理,其具体的预编码加权处理过程对于本领域技术人员来说, 已 是熟知技术, 在此不再赘述。 [129]步骤 806: 将预编码加权处理后的所述下行信号发送给所述 UE。
[130]该步骤中, 基站发送预编码加权处理后的所述下行信号可以采用频分方式、 时 分方式、 码分和 /或空分方式等多种多址方式。
[131]本发明实施例中, 在 UE接入网络前, 基站利用设定的码本对小区公共信号进 行预编码加权处理, 以及在 UE接入网络后, 按照接收到 UE反馈上行信道的 CSI来 计算下行信道的预编码权值, 并利用预编码权值对所有下行信号进行预编码加权处 理。 子 UE接入网络前, 基站利用编码增益来减低公共控制信道的发射功率, 从而降 低基站的整体功耗。
[132]本发明实施例还提供一种信息传输方法, 其流程图如图 9所示, 所述方法包括:
[133]步骤 901 :接收基站发送的小区公共信号,所述小区公共信号是所述基站利用设 定的码本进行预编码加权处理后的信号;
[134]该步骤中, UE在接收到基站发送的小区公共信号时, 进行信道质量检测, 并在 检测结果满足接入条件, 所述 UE发起随机接入过程。
[135]步骤 902: 在随机接入到所述基站后, 并对上行信道进行信道质量检测, 得到所 述上行信道的信道状态信息 CSI;
[136]在 UE随机接入到网络后,所述 UE与网路侧的基站进行信息交互,在交互的过 程中, 所述 UE获取到上行信道的 CSI。
[137]步骤 903 : 将所述 CSI发送给所述基站, 以便于所述基站确定下行信道的预编 码权值。
[138]所述 UE定期或周期将获取到的上行信道的 CSI发送给基站, 以便于基站根据 接收到的上行信道的 CSI计算下行信道的预编码权值,并利用预编码权值对发送的下 行信号进行预编码加权处理。
[139]本发明实施例中, 在 UE接入网络前, 接收到基站利用设定的码本进行预编码 加权处理的小区公共信号,之后, UE在随机接入网络后,并将获得的上行信道的 CSI 发送给基站, 以便于基站按照接收到 UE反馈上行信道的 CSI来计算下行信道的预编 码权值, 并利用该预编码权值对所有通过下行信道的下行信号进行预编码加权处理。 以实现通过编码增益来降低基站的发射功率, 从而降低了基站的整体功耗。
[140]还请参阅图 10,为本发明实施例提供的一种信息传输方法的应用实例的流程图, 具体包括:
[141]步骤 101 : 基站利用对用户空间信道信息量化的方法设计码本 codebook;
[142]其设计码本过程对于本领域技术人员来说, 已是熟知技术, 在此不再赘述。
[143]步骤 102: 基站利用码本对小区公共信号进行预编码加权处理;
[144]其中, 码本 (codebook) 是对信道信息的量化, 用 codebook对小区公共信道 / 信号进行 precoding加权时,每个码本形成的等效波束方向只能针对特定信道的用户。 为了让尽可能多的用户接入系统, 通过采用多个不同码本使用频分、 时分、 空分、 码 分或任意多址方式的组合, 实现用户的接入和测量;
[145]步骤 103 :基站通过下行公共控制信道发送所述预编码加权处理后的小区公共信 号;
[146]该步骤中, 发送的方式有多种, 可以通过频分方式。 时分方式、 码分方式或空 分方式周期性发送所述小区公共信号, 当然, 还可以组合上述方式来发送。
[147]步骤 104: UE在接收到所述基站发送的所述小区公共信号时, 进行信道质量测 [148]步骤 105: UE完成随机接入过程;
[149]步骤 102和步骤 105中, 是 UE在接入网络或接入网络的过程中, 所有通过下 行发射信道的下行公共信号均采用码本进行预编码加权处理。
[150]步骤 106: 在 UE接入基站后, UE获取上行信道的 CSI; [151]也就是说, 在 UE接入基站后, UE与基站之间可以进行信息交互; 并在交互过 程中, UE获取上行信道的 CSI。
[152]步骤 107: UE将所述上行信道的 CSI发送给所述基站; [153]步骤 108: 基站根据所述 CSI计算下行信道的预编码权值; [154]其中, 计算方法对于本领域技术人员来说, 已是熟知技术, 在此不再赘述。 [155]步骤 109: 基站利用预编码权值对下行信号进行预编码鉴权处理;
[156]步骤 110: 基站将预编码鉴权处理的下行信号通过下行信道发送给所述 UE。
[157]其中, 下行信到包括控制信道和数据传输信道, 当然, 还可以包括其他下行信 道, 本实施例不作限制。
[158]在步骤 109和步骤 110中, UR接入网络后, 所有通过下行信道的下行信号均采 用预编码权值进行预编码鉴权处理。
[159]本发明实施例中, 在 UE接入网络前, 基站利用设定的码本对通过小区公共信 道的小区公共信号进行预编码加权处理, 之后, 在 UE随机接入到网络后, 并将获得 的上行信道的 CSI发送给基站,基站按照接收到所述上行信道的 CSI来计算下行信道 的预编码权值,并利用该预编码权值对所有通过下行信道的下行信号进行预编码加权 处理。 实现了通过编码增益来降低基站的发射功率, 从而降低了基站的整体功耗。
[160]在本发明实施例中使用的术语是仅仅出于描述特定实施例的目的, 而非旨在限 制本发明。在本发明实施例和所附权利要求书中所使用的单数形式的"一种"、"所述" 和 "该"也旨在包括多数形式, 除非上下文清楚地表示其他含义。 还应当理解, 本文 中使用的术语 "和 /或"是指并包含一个或多个相关联的列出项目的任何或所有可能 组合。
[161]应当理解, 尽管在本发明实施例中可能采用术语第一、 第二、 第三等来描述各 种信息,但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分 开。 例如, 在不脱离本发明实施例范围的情况下, 第一信息也可以被称为第二信息, 类似地,第二信息也可以被称为第一信息。取决于语境,如在此所使用的词语"如果" 可以被解释成为 "在……时"或 "当……时"或 "响应于确定"。
[162]在本发明实施例中, UE可以为以下任意一种,可以是静态的,也可以是移动的, 静止的 UE 具体可以包括为终端 (terminal )、 移动台 (mobile station ) 用户单元 ( subscriber unit) 或站台 (station) 等, 移动的 UE具体可以包括蜂窝电话 (cellular phone ) 个人数字助理 (PDA, personal digital assistant ) 调制解调器 (modem), 无线通信设备、手持设备( handheld)、笔记本电脑( laptop computer )、无绳电话( cordless phone)或无线本地环路(WLL, wireless local loop) 台等, 上述 UE可以分布于整个 无线网络中。 [163]通过以上的实施方式的描述, 本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平台的方式来实现, 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,该计算机软件产品可以存储在存储 介质中, 如 ROM/RAM、 磁碟、 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或者实施例的某 些部分所述的方法。
[164]以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域的普通技术 人员来说, 在不脱离本发明原理的前提下, 还可以作出若干改进和润饰, 这些改进和 润饰也应视为本发明的保护范围。

Claims

权 利 要 求
1、 一种信息传输装置, 其特征在于, 包括:
第一加权处理单元,用于利用设定的码本对小区公共信号进行预编码加权处 理;
第一发送单元,用于将预编码加权处理后的所述小区公共信号发送给用户设 备 UE;
接收单元, 用于接收所述 UE发送的上行信道的信道状态信息 CSI;
确定单元, 用于根据所述 CSI确定下行信道的预编码权值;
第二加权处理单元,用于利用所述预编码权值对下行信号进行预编码加权处 理;
第二发送单元, 用于将预编码加权处理后的所述下行信号发送给所述 UE。
2、 根据权利要求 1所述的装置, 其特征在于, 第一发送单元, 具体用于将 预编码加权处理后的所述小区公共信号采用频分方式、时分方式、码分方式和空 分方式的一种或多种方式周期性发送给所述 UE。
3、根据权利要求 1或 2所述的装置, 其特征在于, 所述第一加权处理单元, 具体用于利用设定的多个码本对小区公共信号进行预编码加权处理,并在所述预 编码加权处理时, 每个码本形成的等效波束方向针对特定信道的用户设备; 所述 特定信道为每个码本对信道信息进行量化后对应的信道;
其中, 所述多个码本中的不同码本使用频分多址、 时分多址、 空分多址和码 分多址中的一种或多种多址方式对小区公共信号进行预编码加权处理。
4、 一种信息传输装置, 其特征在于, 包括:
接收单元, 用于接收基站发送的小区公共信号, 所述小区公共信号是所述基 站利用设定的码本进行预编码加权处理后的信号;
检测单元, 用于在随机接入到所述基站后, 对上行信道进行信道质量检测, 得到所述上行信道的信道状态信息 CSI;
发送单元, 用于将所述 CSI发送给所述基站。
5、 一种基站, 其特征在于, 包括:
处理器, 用于利用设定的码本对小区公共信号进行预编码加权处理; 收发器,用于将预编码加权处理后的所述小区公共信号发送给用户设备 UE; 并接收所述 UE发送的上行信道的信道状态信息 CSI;
所述处理器,还用于根据所述 CSI确定下行信道的预编码权值, 并利用所述 预编码权值对下行信号进行预编码加权处理;
所述收发器, 还用于将预编码加权处理后的所述下行信号发送给所述 UE。
6、 根据权利要求 5所述的基站, 其特征在于, 所述收发器将预编码加权处 理后的小区公共信号发送给用户设备 UE, 具体包括: 将预编码加权处理后的所 述小区公共信号采用频分方式、时分方式、码分和空分方式的一种或多种方式周 期性发送给所述 UE。
7、 根据权利要求 5或 6所述的基站, 其特征在于, 所述处理器利用设定的 码本对小区公共信号进行预编码加权处理包括:利用设定的多个码本对小区公共 信号进行预编码加权处理, 并在所述预编码加权处理时, 每个码本形成的等效波 束方向针对特定信道的用户设备;所述特定信道为每个码本对信道信息进行量化 后对应的信道;
其中, 所述多个码本中的不同码本使用频分多址、 时分多址、 空分多址和码 分多址中的一种或多种多址方式对小区公共信号进行预编码加权处理。
8、 一种用户设备, 其特征在于, 包括:
收发器, 用于接收基站发送的小区公共信号, 所述小区公共信号是所述基站 利用设定的码本进行预编码加权处理后的信号;
处理器, 用于在随机接入到所述基站后, 对上行信道进行信道质量检测, 得 到所述上行信道的信道状态信息 CSI;
所述收发器, 还用于将所述 CSI发送给所述基站。
9、 一种信息传输方法, 其特征在于, 包括: 利用设定的码本对小区公共信号进行预编码加权处理;
将预编码加权处理后的所述小区公共信号发送给用户设备 UE;
接收所述 UE发送的上行信道的信道状态信息 CSI;
根据所述 CSI确定下行信道的预编码权值;
利用所述预编码权值对下行信号进行预编码加权处理;
将预编码加权处理后的所述下行信号发送给所述 UE。
10、根据权利要求 9所述的方法, 其特征在于, 所述将预编码加权处理后的 所述小区公共信号发送给用户设备 UE, 包括:
将预编码加权处理后的所述小区公共信号采用频分方式、时分方式、码分和 空分方式的一种或多种方式周期性发送给所述 UE。
11、 根据权利要求 9或 10所述的方法, 其特征在于, 所述利用设定的码本 对小区公共信号进行预编码加权处理, 具体包括: 利用设定的多个码本对小区公 共信号进行预编码加权处理, 并在所述预编码加权处理时, 每个码本形成的等效 波束方向针对特定信道的用户设备;所述特定信道为每个码本对信道信息进行量 化后对应的信道;
其中, 所述多个码本中的不同码本使用频分多址、 时分多址、 空分多址和码 分多址中的一种或多种多址方式对小区公共信号进行预编码加权处理。
12、 一种信息传输方法, 其特征在于, 包括:
接收基站发送的小区公共信号,所述小区公共信号是所述基站利用设定的码 本进行预编码加权处理后的信号;
在随机接入到所述基站后, 对上行信道进行信道质量检测, 得到所述上行信 道的信道状态信息 CSI;
将所述 CSI发送给所述基站。
PCT/CN2014/082979 2014-07-25 2014-07-25 一种信息传输方法、装置、基站及用户设备 WO2016011651A1 (zh)

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