WO2014187194A1 - 异构网络中下行发射方法和控制设备、基站和异构*** - Google Patents

异构网络中下行发射方法和控制设备、基站和异构*** Download PDF

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Publication number
WO2014187194A1
WO2014187194A1 PCT/CN2014/074239 CN2014074239W WO2014187194A1 WO 2014187194 A1 WO2014187194 A1 WO 2014187194A1 CN 2014074239 W CN2014074239 W CN 2014074239W WO 2014187194 A1 WO2014187194 A1 WO 2014187194A1
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WIPO (PCT)
Prior art keywords
station
micro
macro
edge
edge user
Prior art date
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PCT/CN2014/074239
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English (en)
French (fr)
Inventor
董伟
戴葵
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华为技术有限公司
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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 KR1020157035734A priority Critical patent/KR101818832B1/ko
Priority to JP2016514254A priority patent/JP6296575B2/ja
Priority to EP14801668.6A priority patent/EP2993938B1/en
Publication of WO2014187194A1 publication Critical patent/WO2014187194A1/zh
Priority to US14/947,889 priority patent/US9949287B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • 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
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies

Definitions

  • Downlink transmitting method and control device, base station and heterogeneous system in heterogeneous network This application claims to be submitted to the Chinese Patent Office on May 22, 2013, the application number is 201310196445.7, and the invention name is "downstream transmission method and control device in heterogeneous network" Priority of Chinese Patent Application for "Base Stations and Heterogeneous Systems", the entire contents of which are incorporated herein by reference.
  • TECHNICAL FIELD The present invention relates to communication technologies, and in particular, to a downlink transmission method and control device, a base station, and a heterogeneous system in a heterogeneous network.
  • a typical wireless cellular network consists of base stations of the same level of transmit power and coverage, and can be classified as a homogeneous network.
  • the same level of transmit power and coverage means that the transmit power and coverage are basically the same, or The difference between the transmit power and the coverage is within the set range.
  • LPNs Low Power Nodes
  • Heterogeneous networks and low-power sites will be formed by stations of different powers. It can also be called a micro station.
  • the purpose of deploying a microstation can be divided into two aspects: improving coverage performance and increasing network capacity.
  • the microstation When the microstation is used to improve coverage performance, the microstation can be deployed in the weak coverage area of the macro station. When the microstation is used to increase network capacity, the microstation can be deployed in the traffic hotspot area. Since the traffic hotspot area may be located at a near midpoint of the macro station signal, when the micro station is deployed at the near midpoint of the macro station, in order to allow the micro station to absorb as many user equipment as possible (User Equipment, UE), increasing the coverage of the micro-station, introduces the Cell Range Expansion (CRE) function.
  • CRE Cell Range Expansion
  • the principle of the CRE function is not to change the transmit power of the micro station, but to configure the switching parameters. Add another configuration to the corresponding threshold, which makes it easier for the UE to switch to the micro station and harder to cut out the micro station.
  • the coverage of the micro-station becomes larger, but the edge users of the micro-station will be closer to the macro station, which increases the uplink and downlink interference between the macro station and the micro-station.
  • an enhanced Inter-Cell Interference Coordination (elCIC) technology is introduced, and the elCIC sets an Almost Blank Subframe (ABS) through the macro station, and the micro station sets it.
  • ABS Almost Blank Subframe
  • the edge users are scheduled on the ABS, and the macro station does not schedule the users of the macro station, thereby reducing the interference of the macro station to the users of the micro station edge, but wasting the macro station resources.
  • the embodiments of the present invention provide a downlink transmission method and a control device, a base station, and a heterogeneous system in a heterogeneous network, to solve the problem of waste of macro station resources existing in the prior art.
  • a downlink transmission method in a heterogeneous network including:
  • the control device determines from the one or more micro stations that at least one needs to jointly transmit information to the edge user in association with the macro station.
  • the control device instructs the macro station and the microstation that need to communicate with the macro station to transmit information to the edge user, transmitting information to the edge user on the ABS.
  • the control device determines, from the one or more micro stations, at least one that needs to jointly transmit information to the edge user with the macro station.
  • Micro station including:
  • a microstation that transmits information to the edge user includes:
  • each resource block (RBG) on the AB S determining, according to whether each micro station transmits information to the edge user in association with the macro station on the RGB, determining a plurality of combination styles;
  • a microstation that needs to be associated with the macro station to transmit information to the edge user is determined based on the combined style with the largest utility function value.
  • the transmitting according to the edge user scheduled by the micro station on the RBG, Rate, determine the utility function value for each combination style:
  • the utility function value representing the i-th combination style ⁇ represents the proportional fair PF parameter of the edge user scheduled by the jth micro-station in the i-th combination style, and N is the scheduling of the edge user on the ABS
  • the number of micro stations, ⁇ is calculated as: ] (R_avg) ]
  • ( ⁇ - ⁇ ); represents an instantaneous rate of the edge user scheduled by the jth micro station in the ith comma
  • ( ? - av g represents the ith type of combination pattern
  • each of the micro stations is a microstation that each needs to transmit information to the edge user in conjunction with the macro station.
  • the determining, by the macro station, the first weight and the second weight corresponding to each micro station Includes:
  • Estimating a first channel matrix between the edge user and the macro station, and the edge user and the need when the micro station that needs to transmit information to the edge user in conjunction with the macro station is one a macro channel jointly performs a second channel matrix between the micro stations transmitting information to the edge user; performing a Singular Value Decomposition (SVD) decomposition on the transposition of the first channel matrix to obtain a corresponding number of the macro station a weight value, and performing SVD decomposition on the transposition of the second channel matrix to obtain a second weight corresponding to the micro station that needs to jointly transmit information to the edge user in association with the macro station; or
  • SVD Singular Value Decomposition
  • the each of the micro-station scheduling is estimated a channel matrix between the edge users and the macro station, obtaining a first channel matrix corresponding to each micro station, and estimating each of the edge users and each of the micro stations scheduled by each of the micro stations a second channel matrix; performing SVD decomposition on the transposition of the first channel matrix corresponding to each micro station to obtain a plurality of first weights, and orthogonalizing the plurality of first weights to obtain a first weight corresponding to the macro station, where the first weight includes a first weight corresponding to each micro station, And performing SVD decomposition on the transposition of the second channel matrix to obtain a second weight corresponding to each of the micro stations.
  • a control device including:
  • the control device determines, from the one or more micro stations, that at least one needs to be associated with the macro station a micro-station where the edge user transmits information;
  • an indication module configured to instruct the macro station and the micro station that needs to jointly transmit information to the edge user with the macro station, and send information to the edge user on the ABS.
  • the determining module is specifically configured to:
  • the micro-station, the combined pattern is used to indicate whether each micro-station cooperates with the macro station to transmit information to the edge user.
  • the determining module is specifically configured to:
  • each resource block RBG on the ABS determining, according to whether each micro station transmits information to the edge user in association with the macro station on the RGB, determining a plurality of combination styles;
  • a microstation that needs to be associated with the macro station to transmit information to the edge user is determined based on the combined style with the largest utility function value.
  • the utility function value determined by the determining module is:
  • ⁇ represents the utility function value of the i-th combination pattern
  • ⁇ represents the proportional fair PF parameter of the edge user scheduled by the jth micro-station in the i-th combination style
  • N is the scheduling of the edge user on the ABS
  • ⁇ is calculated as: ] (R _avg) ]
  • ( ⁇ - ⁇ ); represents an instantaneous rate of the edge user scheduled by the jth micro station in the ith comma
  • ( ? - av g represents the ith type of combination pattern The average rate of edge users scheduled by the j stations on the RBG.
  • the determining module is further configured to: determine a first weight corresponding to the macro station and a second weight corresponding to each micro station, where each micro station needs to jointly transmit information to the edge user in association with the macro station Micro station
  • the indication module is further configured to: send a first weight corresponding to the macro station to the macro station, and send a second weight corresponding to each micro station to each micro station, so that the The macro station and each of the micro stations jointly transmit information to the edge user according to the first weight and the second weight corresponding to each of the micro stations.
  • the determining module is specifically configured to:
  • Estimating a first channel matrix between the edge user and the macro station, and the edge user and the need when the micro station that needs to transmit information to the edge user in conjunction with the macro station is one a macro channel jointly combining a second channel matrix between the micro stations transmitting information to the edge user; performing singular value SVD decomposition on the transposition of the first channel matrix to obtain a first corresponding to the macro station Weighting, and performing SVD decomposition on the transposition of the second channel matrix to obtain a second weight corresponding to the micro station that needs to jointly transmit information to the edge user in conjunction with the macro station; or
  • the each of the micro-station scheduling is estimated a channel matrix between the edge users and the macro station, obtaining a first channel matrix corresponding to each micro station, and estimating each of the edge users and each of the micro stations scheduled by each of the micro stations a second channel matrix; performing SVD decomposition on the transposition of the first channel matrix corresponding to each micro station to obtain a plurality of first weights, and orthogonalizing the plurality of first weights to obtain a first weight corresponding to the macro station, the first weight includes a first weight corresponding to each micro station, and performing SVD decomposition on the transposition of the second channel matrix to obtain each micro The second weight corresponding to the station.
  • a downlink transmission method in a heterogeneous network including:
  • the base station acquires the indication information generated by the control device, where the indication information is generated by the control device after determining that the macro station needs to jointly transmit the information to the edge user scheduled by the micro station, and the indication information is used to indicate the silencer.
  • a micro station on the frame ABS transmitting information to the edge user by a macro station and the micro station that needs to transmit information to the edge station scheduled by the micro station in conjunction with the macro station;
  • the base station transmits information to the edge user on the ABS according to the indication information.
  • the method before the transmitting, by the base station, the information on the ABS to the edge user, the method further includes:
  • Transmitting information to the edge user on the ABS includes:
  • the second possible aspect of the third aspect In an implementation manner, when the base station is a macro station, and at the same time, the micro station that needs to transmit information to the edge user in conjunction with the macro station is at least two, the weights obtained by the macro station include orthogonal to each other. The weight corresponding to each micro station.
  • a base station including:
  • An obtaining module configured to acquire, by the control device, the indication information, where the indication information is generated by the control device, and the micro-station that needs to transmit information to the edge station scheduled by the micro-station to be coordinated with the macro station, where the indication information is used. Demonstrating, on the silent subframe ABS, a macro station transmitting information by the macro station and the edge user that needs to be associated with the macro station to the edge station to transmit information to the edge user; the processing module, configured to, according to the indication information, Information is transmitted to the edge user on the ABS.
  • the obtaining module is further configured to: obtain a weight obtained by the control device, where the weight is a singular value of the transposition of a channel matrix between the base station and the edge user by the control device
  • the processing module is specifically configured to: according to the indication information, send information to the edge user according to the weight value on the ABS.
  • the weights acquired by the acquiring module include mutually corresponding weights corresponding to each of the stations.
  • a heterogeneous system comprising:
  • the macro station is configured to send information to the edge user of the micro station on the silent subframe ABS according to the indication information generated by the control device;
  • the micro station is configured to send information to the edge user on the ABS according to the indication information generated by the control device;
  • the indication information is generated by the control device after determining that the macro station needs to jointly transmit information to the edge user scheduled by the micro station, and the indication information is used to indicate that the macro station and the macro station are on the silent subframe ABS.
  • a micro-station that needs to transmit information to the edge station scheduled by the micro-station in conjunction with the macro station transmits information to the edge user.
  • the macro station is further configured to acquire a first weight obtained by the control device, where the first weight is a transposition of a first channel matrix between the edge user and the macro station by the control device. And performing singular value SVD decomposition, so as to use the first weight to transmit information to the edge user on the ABS according to the indication information;
  • the micro station is further configured to acquire a second weight sent by the control device, where the second weight is a transposition of a second channel matrix between the edge user and the micro station by the control device. get on
  • the SVD is decomposed to transmit information to the edge user by using the second weight on the ABS according to the indication information.
  • the first weight obtained by the macro station includes weights corresponding to mutually opposite micro stations corresponding to each macro station and transmitting information to the edge user.
  • a control device including:
  • the control device determines, from the one or more micro stations, that at least one needs to be associated with the macro station a micro-station where the edge user transmits information;
  • a transmitter configured to instruct the macro station and the micro station that needs to jointly transmit information to the edge user in association with the macro station, and transmit information to the edge user on the ABS.
  • the processor is specifically configured to:
  • a micro station that schedules an edge user on the ABS is a micro station that needs to jointly transmit information to the edge user with the macro station;
  • the micro-station, the combined pattern is used to indicate whether each micro-station cooperates with the macro station to transmit information to the edge user.
  • the processor is specifically configured to:
  • each resource block RBG on the ABS determining, according to whether each micro station transmits information to the edge user in association with the macro station on the RGB, determining a plurality of combination styles;
  • a microstation that needs to be associated with the macro station to transmit information to the edge user is determined based on the combined style with the largest utility function value.
  • the utility function value determined by the processor is:
  • ⁇ represents the utility function value of the i-th combination pattern
  • ⁇ represents the proportional fair PF parameter of the edge user scheduled by the jth micro-station in the i-th combination style
  • N is the scheduling of the edge user on the ABS
  • ⁇ is calculated as: ] (R _avg) ]
  • ( ⁇ - ⁇ ); represents an instantaneous rate of the edge user scheduled by the jth micro station in the ith comma
  • ( ? - av g represents the ith type of combination pattern The average rate of edge users scheduled by the j stations on the RBG.
  • the processor is further configured to: determine a first weight corresponding to the macro station and a second weight corresponding to each micro station;
  • the transmitter is further configured to: send a first weight corresponding to the macro station to the macro station, and send a second weight corresponding to each micro station to each micro station, so that the And the macro station and each of the micro stations jointly transmit information to the edge user according to the first weight and the second weight corresponding to each micro station, where each micro station is required for each A macro station unites a microstation that transmits information to the edge user.
  • the processor is specifically configured to:
  • Estimating a first channel matrix between the edge user and the macro station, and the edge user and the need when the micro station that needs to transmit information to the edge user in conjunction with the macro station is one a macro channel jointly performs a second channel matrix between the micro stations transmitting information to the edge user; performing singular value SVD decomposition on the transposition of the first channel matrix to obtain a first weight corresponding to the macro station, and Performing SVD decomposition on the transposition of the second channel matrix to obtain a second weight corresponding to the micro station that needs to jointly transmit information to the edge user in combination with the macro station; or
  • a base station including:
  • a receiver configured to acquire indication information generated by the control device, where the indication information is generated by the control device after determining that the macro station needs to jointly transmit information to the edge user scheduled by the micro station, and the indication information is used. Instructing, on the silent subframe ABS, the macro station and the micro-station that needs to transmit information to the edge station scheduled by the macro station in conjunction with the macro station to transmit information to the edge user;
  • a processor configured to send information to the edge user on the ABS according to the indication information.
  • the receiver is further configured to: obtain a weight obtained by the control device, where the weight is after the singular value SVD decomposition of the transposition of the channel matrix between the base station and the edge user by the control device owned;
  • the processor is specifically configured to: according to the indication information, send information to the edge user according to the weight on the ABS.
  • the weights acquired by the receiver include weights respectively corresponding to each micro-station that are orthogonal to each other.
  • the embodiment of the present invention can perform the macro-micro joint transmission on the edge users of the micro-station, can avoid the waste of resources caused by the macro station not transmitting data on the ABS, and reduce the resource loss of the macro station, and further, through the macro micro Joint transmission can further improve the performance of edge users and enhance the performance of enhanced inter-Cell Interference Coordination (elCIC).
  • elCIC enhanced inter-Cell Interference Coordination
  • Figure la is a schematic flowchart of a downlink transmission method in a heterogeneous network according to an embodiment of the present invention.
  • Figure lb is a schematic structural diagram of a heterogeneous network corresponding to Figure la;
  • FIG. 2 is a schematic flowchart of determining a micro-station that needs to be jointly transmitted with a macro station according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a macro-micro joint transmission according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a downlink transmission method in another heterogeneous network according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a heterogeneous network corresponding to FIG. 4;
  • FIG. 6 is a schematic structural diagram of a control device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another control device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic flowchart of another downlink transmission method in a heterogeneous network according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a heterogeneous system according to an embodiment of the present invention.
  • FIG. 1 is a schematic flowchart of a downlink transmission method in a heterogeneous network according to an embodiment of the present invention
  • Figure lb is a schematic structural diagram of a heterogeneous network corresponding to Figure la.
  • an embodiment of the present invention provides a heterogeneous network including a macro station, a micro station, and a control device.
  • a macro station is a station that transmits more power than the transmitting power of the micro station.
  • the macro station can be a Macro eNB and the micro station can be a Pico or Femto.
  • the edge user of the micro station refers to the difference between the path loss of the user to the micro station and the path loss of the user to the macro station within a set range, for example, less than 10 dB.
  • the control device refers to a device that can centrally control the micro station and the macro station.
  • the control device can be located in a baseband unit (BBU), and the control device can communicate with the macro station and the micro station through an interface such as an optical fiber.
  • BBU baseband unit
  • the process of this embodiment may include:
  • control device determines, from the one or more micro stations, at least one micro that needs to jointly transmit information to the edge user in association with the macro station.
  • the control device may be a device that controls the macro station and the micro station, and the control device may be set independently of the macro station and the micro station, or may be located in the macro station or the micro station.
  • the control device is, for example, located in a Base Band Unit (BBU), and the macro station and the micro station can share a BBU.
  • BBU Base Band Unit
  • a microstation that needs to jointly transmit information to an edge user in conjunction with a macro station may be simply referred to as a micro station that needs to be jointly transmitted with the macro station.
  • the number of micro-stations for user scheduling on the configured ABS may be one or at least two, and one or more of these micro-stations may be micro-stations that need to be jointly transmitted with the macro station.
  • joint transmission may mean that the macro station and the micro station jointly transmit information to the edge users of the micro station.
  • the macro station and the micro station can use different weights.
  • the weight corresponding to the macro station is wl
  • the weight corresponding to the station is w2
  • the information to be transmitted jointly by the macro station and the micro station is X.
  • the information transmitted by the macro station to the edge user is wl ⁇
  • the information transmitted by the micro station to the edge user is w2 x.
  • control device determines, from the one or more micro stations, at least one micro station that needs to jointly transmit information to the edge user in association with the macro station, and may include:
  • the micro-station, the combined pattern is used to indicate whether each micro-station cooperates with the macro station to transmit information to the edge user.
  • the number of micro-stationes that schedule edge users on the ABS can be detected by the control device.
  • the combination pattern described above may be determined according to a combination of at least two micro stations and a macro station for joint transmission. For example, whether each micro station is jointly transmitted with a macro station is two types, that is, no joint transmission and joint transmission, and then A combination of each of the multiple micro-station can result in a variety of combinations.
  • the first micro station does not transmit jointly with the macro station and the second micro station does not jointly transmit with the macro station
  • the first micro station Combined with the macro station and the second micro station does not jointly transmit with the macro station
  • the first micro station does not jointly transmit with the macro station and the second micro station and the macro station jointly transmit
  • the first micro station and the macro station jointly transmit
  • the second microstation is also transmitted in conjunction with the macro station, so there are four combinations at this time.
  • j denotes the jth base station
  • uj is used to indicate whether the jth microstation is jointly transmitted with the macro station
  • Q may indicate that the jth microstation does not need to be jointly transmitted with the macro station, that is, the jth
  • each micro station has two cases (ie, it can be associated with a macro). Station joint transmission, or can not be combined with the macro station to transmit), then these N micro stations can form two combinations of styles.
  • the control device can determine the utility function value of each of the two combined styles, and determine the micro-station that needs to be jointly transmitted with the macro station according to the combined style with the largest utility function value.
  • determining a combined style, and determining, according to the utility function value of the combined style, a micro station that needs to jointly transmit information to the edge user in association with the macro station may include:
  • each resource block (RBG) on the ABS corresponding to each resource block (RBG) on the ABS, according to whether each micro station transmits information to the edge user in association with the macro station on the RBG, and determines a plurality of combination styles;
  • the various combined styles can form a combined style set.
  • RBG is the basic resource unit for micro-station scheduling users. On each RBG, one micro-station can usually only schedule one user.
  • the number of combined styles included in the combined style set is: 2 N .
  • the formula for calculating the utility function value of the combined style can be:
  • ⁇ represents the value of the utility function of the i-th combination style
  • ⁇ represents the Proportional Fair (PF) parameter of the edge user scheduled by the jth micro-station in the i-th combination style
  • N is the edge user for the ABS
  • PF Proportional Fair
  • (R- ⁇ ) represents the instantaneous rate of the edge user scheduled by the jth microstation in the first combination pattern
  • ( ? - av g represents the jth micro station in the i-th combination style RBG The average rate of scheduled edge users.
  • the above instantaneous rate and average rate may refer to the downlink rate, i.e., the rate at which the base station transmits information to the edge user.
  • the instantaneous rate of each edge user can be calculated according to the Channel Quality Indicator (CQI) of the user equipment (UE) of the edge user.
  • CQI Channel Quality Indicator
  • UE user equipment
  • the instantaneous rate of the edge user can be calculated according to the Channel Quality Indicator (CQI) of the user equipment (UE) of the edge user.
  • the average rate of edge users refers to the average rate obtained by the edge users scheduled on the RBG averaging the instantaneous rates over a set period of time.
  • the instantaneous rate of the edge user can be obtained according to the Transmission Time Interval (TTI), that is, the amount of downlink data in each TTI can be counted, and each TTI is obtained according to the amount of downlink data in the ⁇ and the time occupied by the TTI.
  • TTI Transmission Time Interval
  • the control device instructs the macro station and the micro station that needs to jointly transmit information to the edge user with a macro station, and transmits information to the edge user on the ABS.
  • the control device may send indication information to the macro station and the micro station to instruct the macro station and the micro station to perform the joint transmission described above.
  • the control device may send indication information to the base station (macro station or micro station) not located in the same device, to the base station located in the same device. (Micro station or macro station) transmits indication information through the internal interface, so that the macro station and the micro station perform the above joint transmission.
  • the process of joint transmission may include:
  • the first weight is a coefficient used by the macro station in the joint transmission
  • the second weight is a coefficient used by the micro station in the joint transmission.
  • the original signals generated by the macro station and the micro station are the same, denoted by X, the first weight is represented by wl, and the second weight is represented by w2, then when the joint transmission is performed, the macro station transmits The signal is wl XX and the signal transmitted by the micro station is w2 x.
  • determining the first weight and the second weight may include:
  • a first channel matrix between the edge user and the macro station of each micro station is calculated separately, and a second channel matrix between the edge user of each micro station and the micro station is calculated.
  • the micro-station refers to a micro-station that needs to be jointly transmitted with a macro station, and an edge user of the micro-station can transmit a Sounding Reference Signal (SRS) signal, and the macro station can estimate the first channel according to the received SRS signal.
  • SRS Sounding Reference Signal
  • the matrix, the micro station can estimate the second channel matrix according to the received SRS signal; obtaining the above-mentioned first channel matrix and the second channel matrix according to the SRS signal can use an existing universal channel estimation algorithm.
  • Singular Value Decomposition (SVD) decomposition is performed on the transposition of the first channel matrix to obtain a first weight, and the transposition of the second channel matrix is subjected to SVD decomposition to obtain a second weight.
  • U, S, and V matrices can be obtained, and the conjugate transpose of the V matrix can be determined as the above-described weight.
  • the first weight is obtained when the transposition of the first channel matrix is performed by SVD decomposition
  • the second weight is obtained when the transposition of the second channel matrix is performed by SVD decomposition.
  • orthogonal processing may be performed on each micro station corresponding to the first weight, so that different first weights corresponding to different micro stations are orthogonal to each other.
  • the macro station may estimate the first channel matrix corresponding to each micro station according to the SRS signal transmitted by the edge user of each micro station. Then, the transposition of the first channel matrix corresponding to each micro station is subjected to SVD decomposition to obtain: a first weight corresponding to the first micro station and a first weight corresponding to the second micro station.
  • the macro station may estimate the first channel matrix between the edge user and the macro station scheduled by the first micro station according to the SRS signal transmitted by the edge user scheduled by the first micro station, and the macro station according to the edge of the second micro station scheduling
  • the SRS signal transmitted by the user is estimated to obtain a first channel matrix between the edge user and the macro station scheduled by the second micro station, and the transposition of the first channel matrix between the edge user and the macro station scheduled by the first micro station is performed.
  • the first weight corresponding to the first micro station is obtained, and the transposition of the first channel matrix between the edge user and the macro station scheduled by the second micro station is subjected to SVD decomposition to obtain the first corresponding to the second micro station.
  • the weights may be orthogonalized to the two first weights, so that the first weights of the macro station using the orthogonalization process are jointly transmitted with the first micro station and the second micro station, respectively.
  • determining a first weight corresponding to the macro station and a second weight corresponding to each micro station including:
  • Estimating a first channel matrix between the edge user and the macro station, and the edge user and the need when the micro station that needs to transmit information to the edge user in conjunction with the macro station is one a macro channel jointly performs a second channel matrix between the micro stations transmitting information to the edge user; performing singular value SVD decomposition on the transposition of the first channel matrix to obtain a first weight corresponding to the macro station, and Performing SVD decomposition on the transposition of the second channel matrix to obtain a second weight corresponding to the micro station that needs to jointly transmit information to the edge user in combination with the macro station; or
  • the each of the micro-station scheduling is estimated The channel matrix between the edge users and the macro station, and the corresponding number of each micro station is obtained.
  • a channel matrix and estimating a second channel matrix between each of the edge users scheduled by each of the micro stations and each of the micro stations; and transposing the first channel matrix corresponding to each of the micro stations Performing SVD decomposition to obtain a plurality of first weights, performing orthogonalization processing on the plurality of first weights to obtain a first weight corresponding to the macro station, where the first weight includes each micro The first weight of the station, and the SVD decomposition of the transposition of the second channel matrix to obtain a second weight corresponding to each of the micro stations.
  • the micro station that needs to transmit information to the edge user in conjunction with the macro station can determine each RBG corresponding to the ABS, and therefore, when the need to cooperate with the macro station to transmit information to the edge user.
  • the edge user mentioned above refers to the edge user scheduled to be transmitted on the RBG by the micro-station that needs to transmit information to the edge user in conjunction with the macro station.
  • the number of micro stations that need to be combined with the macro station to transmit information to the edge user is at least two
  • each of the edge users scheduled by each of the micro stations refers to each RBG corresponding to each RBG
  • the micro-station is an edge user scheduled on the RBG.
  • the foregoing notification may be that when the control device is independently set with the macro station and the micro station, the control device sends the first weight and the second weight to the macro station and the micro station respectively, where the control device is located in the same device as one of the base stations.
  • the above notification may be notified through the internal interface of the device.
  • the above joint transmission may mean that the macro station and the micro station weight the original identical signals according to the weights received by each and send them to the edge users of the micro station.
  • the control device may send the first weight to the macro station, the first weight is represented by w1, and the control device sends the second weight to the first micro.
  • the second weight is represented by w2. It is assumed that the same signal originally generated by the macro station and the micro station is represented by X, and the signal transmitted by the macro station to the edge user of the first micro station is wl ⁇ ⁇ , the first micro station The edge user of the first microstation transmits a signal of w2 xx.
  • the macro station can be avoided by performing macro-micro joint transmission on the edge users of the micro station.
  • the problem of resource waste caused by not transmitting data on the ABS subframe reduces the loss of macro station resources.
  • the macro-micro joint transmission can further improve the performance of the edge user and enhance the performance of the elCIC.
  • FIG. 4 is a schematic flowchart of a downlink transmission method in another heterogeneous network according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a heterogeneous network corresponding to FIG. 4, in this embodiment, scheduling micro-edge users on an ABS
  • the station includes a first micro station and a second micro station, and the scheduled edge users are the first UE and the second UE, respectively.
  • the macro station of this embodiment may be marco, and the micro station may be micro, pico or Femto.
  • this embodiment includes:
  • the users scheduled by the micro station can be determined according to the priority of the user on each RBG of the ABS. For example, the user with the highest priority is determined as the user scheduled by the micro station, and the priority of the user can be determined according to the PF, Signal to Interference plus Noise Ratio (SINR), and the like.
  • SINR Signal to Interference plus Noise Ratio
  • the path loss between the user and the micro station scheduled on each RBG and the path loss between the user and the macro station scheduled on each RGB may be determined on the RGB.
  • the scheduled user is an edge user, for example, when the difference between the two path losses is within the set range, the user may be determined to be an edge user, otherwise it is a non-edge user.
  • the edge user scheduled by the first micro station is the first UE
  • the edge user scheduled by the second micro station is the second UE.
  • the possible combination styles include: P(0,0), ⁇ (0,1), ⁇ (1,0), and P(l,l), where ⁇ (0 , 0) means that both micro stations are independently transmitted, ⁇ (0,1) indicates that the first micro station transmits independently, the second micro station and the macro station jointly transmit, ⁇ (1,0) indicates the first micro station and macro Station joint Shot, the second micro station transmits independently, P(l,l) indicates that both micro stations are jointly transmitted with the macro station.
  • the macro station and the micro station jointly transmit to the user of the micro station edge, which can improve the performance of the user of the micro station edge, compensate for the loss of the macro station ABS, and enhance the performance of the static elCIC.
  • FIG. 6 is a schematic structural diagram of a control device according to an embodiment of the present invention.
  • the device may be a control device for controlling a macro station and a micro station.
  • the device 60 includes a determining module 61 and an indicating module 62.
  • the determining module 61 is used to be a When the plurality of micro stations need to schedule the edge users on the ABS, the control device determines, from the one or more micro stations, at least one micro station that needs to jointly transmit information to the edge user with the macro station; 62 for indicating the macro station and the micro station that needs to jointly transmit information to the edge user with the macro station, and transmitting information to the edge user on the ABS.
  • the determining module is specifically configured to:
  • the micro-station, the combined pattern is used to indicate whether each micro-station cooperates with the macro station to transmit information to the edge user.
  • the determining module is specifically configured to:
  • each RBG on the ABS corresponds to whether each micro station is on the RGB and the macro
  • the station jointly transmits information to the edge user to determine a plurality of combination styles
  • a microstation that needs to be associated with the macro station to transmit information to the edge user is determined based on the combined style with the largest utility function value.
  • the utility function value determined by the determining module is:
  • ⁇ represents the utility function value of the i-th combination pattern
  • ⁇ represents the proportional fair PF parameter of the edge user scheduled by the jth micro-station in the i-th combination style
  • N is the scheduling of the edge user on the ABS
  • ⁇ is calculated as: 1 (R_avg) ]
  • ( ⁇ _ ⁇ ); represents the instantaneous rate of the j-th micro-station in the i-th combination style
  • ( ? - av g represents the j-th in the i-th combination style
  • the determining module is further configured to: determine a first weight corresponding to the macro station and a second weight corresponding to each micro station, where each micro station needs to associate with the macro station The micro-station that the edge user transmits the information; the indication module is further configured to: send the first weight corresponding to the macro station to the macro station, and send the second weight corresponding to each micro station to each a micro station, such that the macro station and each of the micro stations jointly transmit information to the edge user according to the first weight and the second weight corresponding to each of the micro stations.
  • the determining module is specifically configured to:
  • Estimating a first channel matrix between the edge user and the macro station, and the first edge user and the when the micro station that needs to transmit information to the edge user in conjunction with the macro station is one A second channel moment between the microstation that needs to be associated with the macro station to transmit information to the edge user Performing SVD decomposition on the transposition of the first channel matrix to obtain a first weight corresponding to the macro station, and performing SVD decomposition on the transposition of the second channel matrix to obtain the requirement to be associated with the macro station a second weight corresponding to the micro station transmitting information to the edge user; or
  • the each of the micro-station scheduling is estimated a channel matrix between the edge users and the macro station, obtaining a first channel matrix corresponding to each micro station, and estimating each of the edge users and each of the micro stations scheduled by each of the micro stations a second channel matrix; performing SVD decomposition on the transposition of the first channel matrix corresponding to each micro station to obtain a plurality of first weights, and orthogonalizing the plurality of first weights to obtain a first weight corresponding to the macro station, the first weight includes a first weight corresponding to each micro station, and performing SVD decomposition on the transposition of the second channel matrix to obtain each micro The second weight corresponding to the station.
  • the device 70 includes a processor 71 and a transmitter 72.
  • the processor 71 is configured to control when one or more micro stations need to schedule edge users on the ABS. Determining, from the one or more micro-station, at least one micro-station that needs to cooperate with the macro station to transmit information to the edge user; the transmitter 72 is configured to indicate the macro station and the need to cooperate with the macro station.
  • the micro-station that the edge user transmits information transmits information to the edge user on the ABS.
  • the processor is specifically configured to:
  • the processor is specifically configured to:
  • each RBG on the ABS determining, according to whether each micro station transmits information to the edge user in association with the macro station on the RGB, determining a plurality of combination styles
  • a microstation that needs to be associated with the macro station to transmit information to the edge user is determined based on the combined style with the largest utility function value.
  • the utility function value determined by the processor is:
  • ⁇ represents the utility function value of the i-th combination pattern
  • ⁇ represents the proportional fair PF parameter of the edge user scheduled by the jth micro-station in the i-th combination style
  • N is the scheduling of the edge user on the ABS
  • the calculation formula for ⁇ is:
  • ( ⁇ _ ⁇ ); represents an instantaneous rate of the edge user scheduled by the jth micro station in the i-th combination pattern
  • ( ? - av g represents the i-th combination style The average rate of edge users scheduled by the j stations on the RBG.
  • the processor is further configured to: determine a first weight corresponding to the macro station and a second weight corresponding to each micro station, where each micro station needs to associate with the macro station for each a micro-station that transmits information to the edge user; the transmitter is further configured to: send a first weight corresponding to the macro station to the macro station, and send a second weight corresponding to each micro station to each a micro station, such that the macro station and each of the micro stations jointly transmit information to the edge user according to the first weight and the second weight corresponding to each of the micro stations.
  • the processor is specifically configured to:
  • the micro-station that needs to jointly transmit information to the edge user in conjunction with the macro station is one, estimate And a second channel matrix between the edge user and the macro station, and a second channel matrix between the edge user and the micro station that needs to transmit information to the edge user in conjunction with the macro station; Transmitting the first channel matrix to perform SVD decomposition to obtain a first weight corresponding to the macro station, and performing SVD decomposition on the transposition of the second channel matrix to obtain the need to cooperate with the macro station to the a second weight corresponding to the micro-station that the edge user transmits the information; or
  • the each of the micro-station scheduling is estimated a channel matrix between the edge users and the macro station, obtaining a first channel matrix corresponding to each micro station, and estimating each of the edge users and each of the micro stations scheduled by each of the micro stations a second channel matrix; performing SVD decomposition on the transposition of the first channel matrix corresponding to each micro station to obtain a plurality of first weights, and orthogonalizing the plurality of first weights to obtain a first weight corresponding to the macro station, the first weight includes a first weight corresponding to each micro station, and performing SVD decomposition on the transposition of the second channel matrix to obtain each micro The second weight corresponding to the station.
  • the device may also include general purpose components such as receivers, memories, input and output devices, and the like.
  • the problem of resource waste caused by the macro station not transmitting data on the ABS subframe can be avoided, and the macro station resource loss is reduced. Further, the macro-micro joint transmission can further improve the performance of edge users and enhance the performance of elCIC.
  • the base station side can perform:
  • the base station acquires the indication information generated by the control device, where the indication information is generated by the control device, after determining that the macro station needs to jointly transmit the information to the edge user scheduled by the micro station, the indication information is used to indicate that A micro station on the ABS transmitting information to the edge user by a macro station and the micro station that needs to transmit information to the edge station scheduled by the micro station in conjunction with the macro station;
  • control device when the control device and the base station are located in different devices, the control device may indicate The information is sent to the base station; when the control device and the base station are located in the same device, the control device may transmit the indication information through the internal interface.
  • control device determines to be jointly transmitted with the macro station.
  • the base station sends information to the edge user on the ABS according to the indication information.
  • the method before the transmitting, by the base station, the information on the ABS to the edge user according to the indication information, the method further includes:
  • Transmitting information to the edge user on the ABS includes: transmitting, on the ABS, information to the edge user according to the weight.
  • the received weight may be a first weight.
  • the received weight may be a second weight, and the first weight and the second weight are specific.
  • the calculation method can be referred to the description of the above control device.
  • the weights obtained by the macro station include orthogonal to each other.
  • the control device orthogonalizes the plurality of first weights obtained after the SVD is decomposed to obtain the first weights after orthogonalization and sends the first weights to the macro station. For details, see the description of the control device.
  • the embodiment of the present invention further provides a base station.
  • the base station 90 includes an obtaining module 91 and a processing module 92.
  • the obtaining module 91 is configured to acquire indication information generated by the control device, where the indication information is
  • the control device determines that the micro-station needs to be associated with the macro station to transmit information to the edge user scheduled by the micro-station, and the indication information is used to indicate that the macro station and the macro station are combined with the macro station on the silent sub-frame ABS.
  • the micro-station that the station-scheduled edge user transmits information transmits information to the edge user;
  • the processing module 92 is configured to: according to the indication information, in the ABS
  • the acquiring module is further configured to: obtain a weight obtained by the control device, where the weight is that the control device performs a singularity on a transposition of a channel matrix between the base station and the edge user. The value obtained after the SVD is decomposed;
  • the processing module is specifically configured to: according to the indication information, send information to the edge user according to the weight value on the ABS.
  • the weights acquired by the acquiring module include mutually orthogonal The weight corresponding to each micro station.
  • the foregoing obtaining module may be specifically a receiver or a transceiver, and the foregoing processing module may be specifically a processor.
  • the base station may further include general components such as a memory, an antenna, a baseband processing unit, a medium RF processing unit, and an input/output device.
  • the base station may include a receiver and a processor, where the receiver is configured to acquire indication information generated by the control device, where the indication information is a micro station that the control device determines that the macro station needs to jointly transmit information to the edge user scheduled by the micro station. And the indication information is used to indicate that the micro station that transmits information on the silent subframe ABS by the macro station and the edge user that needs to cooperate with the macro station to schedule the micro station to transmit information to the edge user; And transmitting information to the edge user on the ABS according to the indication information.
  • the indication information is a micro station that the control device determines that the macro station needs to jointly transmit information to the edge user scheduled by the micro station.
  • the indication information is used to indicate that the micro station that transmits information on the silent subframe ABS by the macro station and the edge user that needs to cooperate with the macro station to schedule the micro station to transmit information to the edge user; And transmitting information to the edge user on the ABS according to the indication information.
  • the receiver is further configured to: obtain a weight obtained by the control device, where the weight is that the control device performs a singularity on a transposition of a channel matrix between the base station and the edge user.
  • the processor is specifically configured to: according to the indication information, send information to the edge user according to the weight on the ABS.
  • the weights obtained by the receiver include orthogonal to each other. The weight corresponding to each micro station.
  • the macro station can be avoided by performing macro-micro joint transmission on the edge users of the micro station.
  • the resource waste caused by not transmitting data on the ABS subframe reduces the macro station resource loss.
  • the macro-micro joint transmission can further improve the performance of the edge user and enhance the performance of the elCIC.
  • an embodiment of the present invention further provides a heterogeneous system, where the system 100 includes a macro station 101 and a micro station 102.
  • the macro station 101 is configured to: according to the indication information generated by the control device, on the ABS.
  • An edge user of the micro station transmits information; and the micro station 102 is configured to send information to the edge user on the ABS according to the indication information generated by the control device; the indication information is determined by the control device.
  • the macro station is generated after the micro station that transmits the information to the edge user scheduled by the micro station, and the indication information is used to indicate that the macro station and the edge user that needs to be jointly coordinated with the macro station to the micro station are configured on the silent subframe ABS.
  • a microstation transmitting information transmits information to the edge user.
  • the macro station 101 is further configured to acquire a first weight obtained by the control device, where the first weight is the first between the edge device and the macro station by the control device.
  • the transposition of the channel matrix is performed after SVD decomposition, so as to transmit information to the edge user by using the first weight on the ABS according to the indication information;
  • the micro station 102 is also used to acquire a second weight value sent by the control device, where the second weight is obtained by the control device performing SVD decomposition on the transposition of the second channel matrix between the edge user and the micro station, so as to be
  • the indication information is used to transmit information to the edge user by using the second weight on the ABS.
  • the first weights obtained by the macro station include mutually orthogonal and respectively A weight corresponding to the microstation that transmits information to the edge user in conjunction with the macro station.
  • the problem of resource waste caused by the macro station not transmitting data on the ABS subframe can be avoided, and the macro station resource loss is reduced. Further, the macro-micro joint transmission can further improve the performance of the edge user and enhance the performance of the elCIC.
  • the internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • a computer readable storage medium including a number of instructions to make a computer device (can be an individual)
  • a computer, server, or control device, or the like, or a processor performs all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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Abstract

本发明提供一种异构网络中下行发射方法和控制设备、基站和异构***，该方法包括当一个或多个微站需要在静默子帧ABS上对边缘用户进行调度时，控制设备从所述一个或多个微站中确定出至少一个需要与宏站联合向所述边缘用户发射信息的微站；所述控制设备指示所述宏站和所述需要与宏站联合向所述边缘用户发射信息的微站，在所述ABS上向所述边缘用户发射信息。本发明实施例可以提升微站边缘用户的性能，弥补宏站的资源浪费，增强***性能。

Description

异构网络中下行发射方法和控制设备、 基站和异构*** 本申请要求于 2013 年 05 月 22 日提交中国专利局、 申请号为 201310196445.7、 发明名称为"异构网络中下行发射方法和控制设备、 基站 和异构***"的中国专利申请的优先权， 其全部内容通过引用结合在本申请 中。 技术领域 本发明涉及通信技术， 尤其涉及一种异构网络中下行发射方法和控制 设备、 基站和异构***。
背景技术 典型的无线蜂窝网络由相同等级发射功率和覆盖范围的基站组成， 可 以归类为同构网络（ Homogeneous network ) ,相同等级发射功率和覆盖范围 是指发射功率和覆盖范围基本相同， 或者说发射功率的差值和覆盖范围的 差值在设定范围内。 为了进一步提高容量及覆盖性能， 会在宏站 （Macro eNB ) 的部署范围内增加一些小功率站点 （Low Power Node, LPN ), 由不 同功率的站点构成异构网络 ( Heterogeneous network ), 小功率站点也可以 称为微站。 部署微站的目的可以分为提升覆盖性能和提高网络容量两个方 面。 在微站用于提升覆盖性能时， 微站可以部署在宏站的弱覆盖区域。 在 微站用于提高网络容量时， 微站可以部署在话务量热点区域。 由于话务量 热点区域有可能位于宏站信号较好的近中点位置， 当微站部署在宏站的近 中点位置时， 为了让微站尽可能吸收比较多的用户设备 ( User Equipment, UE ), 增加微站的覆盖范围， 引入了小区范围扩展（Cell Range Expansion, CRE ) 功能。
CRE功能的原理是不改变微站的发射功率， 而是通过配置切换参数， 在相应的门限上再加入一个配置，切换时使 UE更容易切换到微站以及更难 切出微站。 通过上述的操作， 使得微站的覆盖范围变大， 但微站的边缘用 户将更靠近宏站， 增大了宏站和微站之间的上下行干扰。
针对宏站对微站的下行干扰， 引入了增强的小区间干扰协调（enhanced Inter-Cell Interference Coordination, elCIC )技术， elCIC通过宏站设置静默 子帧 （Almost Blank Subframe, ABS ), 微站将其边缘用户在 ABS上调度， 而宏站在 ABS不对宏站的用户进行调度， 由此可以减小宏站对微站边缘用 户的干扰， 但是浪费了宏站资源。
发明内容 有鉴于此， 本发明实施例提供了一种异构网络中下行发射方法和控制 设备、 基站和异构***， 用以解决现有技术中存在的宏站资源浪费的问题。
第一方面， 提供了一种异构网络中下行发射方法， 包括：
当一个或多个微站需要在静默子帧 ABS上对边缘用户进行调度时， 控 制设备从所述一个或多个微站中确定出至少一个需要与宏站联合向所述边 缘用户发射信息的微站；
所述控制设备指示所述宏站和所述需要与宏站联合向所述边缘用户发 射信息的微站， 在所述 ABS上向所述边缘用户发射信息。
结合第一方面， 在第一方面的第一种可能的实现方式中， 所述控制设 备从所述一个或多个微站中确定出至少一个需要与宏站联合向所述边缘用 户发射信息的微站， 包括：
当所述 ABS上对边缘用户进行调度的微站的个数为一个时， 确定所述 在所述 ABS上对边缘用户进行调度的微站为需要与宏站联合向所述边缘用 户发射信息的微站； 或者，
当所述 ABS上对边缘用户进行调度的微站的个数为至少两个时， 确定 组合样式， 并根据所述组合样式的效用函数值， 确定需要与宏站联合向所 述边缘用户发射信息的微站， 所述组合样式用于指示每个微站是否与宏站 联合向所述边缘用户发射信息。
结合第一方面的第一种可能的实现方式， 在第一方面的第二种可能的 实现方式中， 所述确定组合样式， 并根据所述组合样式的效用函数值， 确 定需要与宏站联合向所述边缘用户发射信息的微站， 包括：
对应所述 AB S上的每个资源块（ Resource Block Grou , RBG ) , 根据 每个微站是否在所述 RGB上与宏站联合向所述边缘用户发射信息， 确定多 种组合样式；
根据所述 RBG 上每个微站向所述微站调度的边缘用户发射信息的速 率， 确定每种组合样式的效用函数值；
根据效用函数值最大的组合样式确定需要与宏站联合向所述边缘用户 发射信息的微站。
结合第一方面的第二种可能的实现方式， 在第一方面的第三种可能的 实现方式中， 所述根据所述 RBG上每个微站向所述微站调度的边缘用户发 射信息的速率， 确定每种组合样式的效用函数值为：
Figure imgf000005_0001
其中， 表示第 i种组合样式的效用函数值， ^表示所述第 i种组合 样式中第 j个微站调度的边缘用户的比例公平 PF参数， N为所述 ABS上对 边缘用户进行调度的微站的个数， Ρ 的计算公式为： ] (R_avg)]
其中， （^-^);表示所述第 i种组合样式中第 j个微站在所述 RBG上调 度的边缘用户的瞬时速率， （? - avg 表示所述第 i种组合样式中第 j个微站 在所述 RBG上调度的边缘用户的平均速率。 结合第一方面或第一方面的第一种至第三种任一种可能的实现方式， 在第一方面的第四种可能的实现方式中， 所述指示所述宏站和所述需要与 宏站联合向所述边缘用户发射信息的微站， 在所述 ABS上向所述边缘用户 发射信息， 包括：
确定宏站对应的第一权值和每个微站对应的第二权值， 将所述宏站对 应的第一权值发送给所述宏站， 将所述每个微站对应的第二权值发送给每 个微站， 以使所述宏站和所述每个微站分别根据所述第一权值和所述每个 微站对应的第二权值向所述边缘用户联合发射信息， 所述每个微站为每个 需要与宏站联合向所述边缘用户发射信息的微站。
结合第一方面的第四种可能的实现方式， 在第一方面的第五种可能的 实现方式中， 所述确定宏站对应的第一权值和每个微站对应的第二权值， 包括：
当所述需要与宏站联合向所述边缘用户发射信息的微站为一个时， 估 计所述边缘用户和所述宏站之间的第一信道矩阵， 以及所述边缘用户和所 述需要与宏站联合向所述边缘用户发射信息的微站之间的第二信道矩阵； 对所述第一信道矩阵的转置进行奇异值 ( Singular Value Decomposition , SVD )分解得到所述宏站对应的第一权值， 以及， 对所述第二信道矩阵的 转置进行 SVD分解得到所述需要与宏站联合向所述边缘用户发射信息的微 站对应的第二权值； 或者，
当同时需要与宏站联合向所述边缘用户发射信息的微站为至少两个 时， 对应所述每个微站以及调度的每个边缘用户， 估计所述每个微站调度 的所述每个边缘用户和所述宏站之间的信道矩阵， 得到对应每个微站的第 一信道矩阵， 以及估计所述每个微站调度的所述每个边缘用户和所述每个 微站之间的第二信道矩阵； 对所述对应每个微站的第一信道矩阵的转置进 行 SVD分解得到多个第一权值， 对所述多个第一权值进行正交化处理， 得 到所述宏站对应的第一权值， 所述第一权值包括对应每个微站的第一权值 , 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述每个微站对应的 第二权值。
第二方面， 提供了一种控制设备， 包括：
确定模块， 用于当一个或多个微站需要在静默子帧 ABS上对边缘用户 进行调度时， 控制设备从所述一个或多个微站中确定出至少一个需要与宏 站联合向所述边缘用户发射信息的微站；
指示模块， 用于指示所述宏站和所述需要与宏站联合向所述边缘用户 发射信息的微站， 在所述 ABS上向所述边缘用户发射信息。
结合第二方面， 在第二方面的第一种可能的实现方式中， 所述确定模 块具体用于：
当所述 ABS上对边缘用户进行调度的微站的个数为一个时， 确定所述 在所述 ABS上对边缘用户进行调度的微站为需要与宏站联合向所述边缘用 户发射信息的微站； 或者，
当所述 ABS上对边缘用户进行调度的微站的个数为至少两个时， 确定 组合样式， 并根据所述组合样式的效用函数值， 确定需要与宏站联合向所 述边缘用户发射信息的微站， 所述组合样式用于指示每个微站是否与宏站 联合向所述边缘用户发射信息。
结合第二方面的第一种可能的实现方式， 在第二方面的第二种可能的 实现方式中， 所述确定模块具体用于：
对应所述 ABS上的每个资源块 RBG, 根据每个微站是否在所述 RGB 上与宏站联合向所述边缘用户发射信息， 确定多种组合样式；
根据所述 RBG 上每个微站向所述微站调度的边缘用户发射信息的速 率， 确定每种组合样式的效用函数值；
根据效用函数值最大的组合样式确定需要与宏站联合向所述边缘用户 发射信息的微站。
结合第二方面的第二种可能的实现方式， 在第二方面的第三种可能的 实现方式中， 所述确定模块确定的所述效用函数值为：
Figure imgf000008_0001
其中， ^表示第 i种组合样式的效用函数值， Ρ 表示所述第 i种组合 样式中第 j个微站调度的边缘用户的比例公平 PF参数， N为所述 ABS上对 边缘用户进行调度的微站的个数， Ρ 的计算公式为： ] (R _avg)]
其中， （^-^);表示所述第 i种组合样式中第 j个微站在所述 RBG上调 度的边缘用户的瞬时速率， （?-avg 表示所述第 i种组合样式中第 j个微站 在所述 RBG上调度的边缘用户的平均速率。
结合第二方面或第二方面的第一种至第三种任一种可能的实现方式， 在第二方面的第四种可能的实现方式中，
所述确定模块还用于： 确定宏站对应的第一权值和每个微站对应的第 二权值， 所述每个微站为每个需要与宏站联合向所述边缘用户发射信息的 微站；
所述指示模块还用于： 将所述宏站对应的第一权值发送给所述宏站， 将所述每个微站对应的第二权值发送给每个微站 , 以使所述宏站和所述每 个微站分别根据所述第一权值和所述每个微站对应的第二权值向所述边缘 用户联合发射信息。
结合第二方面的第四种可能的实现方式， 在第二方面的第五种可能的 实现方式中， 所述确定模块具体用于：
当所述需要与宏站联合向所述边缘用户发射信息的微站为一个时， 估 计所述边缘用户和所述宏站之间的第一信道矩阵， 以及所述边缘用户和所 述需要与宏站联合向所述边缘用户发射信息的微站之间的第二信道矩阵； 对所述第一信道矩阵的转置进行奇异值 SVD分解得到所述宏站对应的第一 权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述需要与宏 站联合向所述边缘用户发射信息的微站对应的第二权值； 或者，
当同时需要与宏站联合向所述边缘用户发射信息的微站为至少两个 时， 对应所述每个微站以及调度的每个边缘用户， 估计所述每个微站调度 的所述每个边缘用户和所述宏站之间的信道矩阵， 得到对应每个微站的第 一信道矩阵， 以及估计所述每个微站调度的所述每个边缘用户和所述每个 微站之间的第二信道矩阵； 对所述对应每个微站的第一信道矩阵的转置进 行 SVD分解得到多个第一权值， 对所述多个第一权值进行正交化处理， 得 到所述宏站对应的第一权值， 所述第一权值包括对应每个微站的第一权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述每个微站对应的 第二权值。
第三方面， 提供了一种异构网络中下行发射方法， 包括：
基站获取控制设备生成的指示信息， 所述指示信息是所述控制设备确 定需要与宏站联合向微站调度的边缘用户发射信息的微站后生成的， 所述 指示信息用于指示在静默子帧 ABS上由宏站和所述需要与宏站联合向微站 调度的边缘用户发射信息的微站向所述边缘用户发射信息；
所述基站根据所述指示信息，在所述 ABS上向所述边缘用户发射信息。 结合第三方面， 在第三方面的第一种可能的实现方式中， 所述基站根 据所述指示信息， 在所述 ABS上向所述边缘用户发射信息之前， 所述方法 还包括：
所述基站获取所述控制设备得到的权值， 所述权值是所述控制设备对 所述基站与所述边缘用户之间的信道矩阵的转置进行奇异值 SVD分解后得 到的；
所述在所述 ABS上向所述边缘用户发射信息， 包括：
在所述 ABS上， 根据所述权值向所述边缘用户发射信息。
结合第三方面的第一种可能的实现方式， 在第三方面的第二种可能的 实现方式中， 当所述基站为宏站， 且同时需要与宏站联合向所述边缘用户 发射信息的微站为至少两个时， 所述宏站获取的所述权值包括相互正交的 分别与每个微站对应的权值。
第四方面， 提供了一种基站， 包括：
获取模块， 用于获取控制设备生成的指示信息， 所述指示信息是所述 控制设备确定需要与宏站联合向微站调度的边缘用户发射信息的微站后生 成的， 所述指示信息用于指示在静默子帧 ABS上由宏站和所述需要与宏站 联合向微站调度的边缘用户发射信息的微站向所述边缘用户发射信息； 处理模块， 用于根据所述指示信息， 在所述 ABS上向所述边缘用户发 射信息。
结合第四方面， 在第四方面的第一种可能的实现方式中，
所述获取模块还用于： 获取所述控制设备得到的权值， 所述权值是所 述控制设备对所述基站与所述边缘用户之间的信道矩阵的转置进行奇异值
SVD分解后得到的；
所述处理模块具体用于： 根据所述指示信息， 在所述 ABS上， 根据所 述权值向所述边缘用户发射信息。
结合第四方面的第一种可能的实现方式， 在第四方面的第二种可能的 实现方式中， 当所述基站为宏站， 且同时需要与宏站联合向所述边缘用户 发射信息的微站为至少两个时， 所述获取模块获取的所述权值包括相互正 交的分别与每个 ϋ站对应的权值。
第五方面， 提供了一种异构***， 包括：
宏站和 ϋ站；
所述宏站用于根据控制设备生成的指示信息， 在静默子帧 ABS上向所 述微站的边缘用户发射信息； 以及，
所述微站用于根据控制设备生成的指示信息， 在所述 ABS上向所述边 缘用户发射信息； 所述指示信息是所述控制设备确定需要与宏站联合向微站调度的边缘 用户发射信息的微站后生成的， 所述指示信息用于指示在静默子帧 ABS上 由宏站和所述需要与宏站联合向微站调度的边缘用户发射信息的微站向所 述边缘用户发射信息。
结合第五方面， 在第五方面的第一种可能的实现方式中，
所述宏站还用于获取所述控制设备得到的第一权值， 所述第一权值是 所述控制设备对所述边缘用户和所述宏站之间的第一信道矩阵的转置进行 奇异值 SVD分解后得到的， 以便根据所述指示信息， 在所述 ABS上釆用 所述第一权值向所述边缘用户发射信息；
所述微站还用于获取所述控制设备发送的第二权值， 所述第二权值是 所述控制设备对所述边缘用户和所述微站之间的第二信道矩阵的转置进行
SVD分解后得到的， 以便根据所述指示信息， 在所述 ABS上釆用所述第二 权值向所述边缘用户发射信息。
结合第五方面的第一种可能的实现方式， 在第五方面的第二种可能的 实现方式中， 当同时需要与宏站联合向所述边缘用户发射信息的微站为至 少两个时， 所述宏站获取的所述第一权值包括相互正交的分别与每个同时 需要与宏站联合向所述边缘用户发射信息的微站对应的权值。
第六方面， 提供了一种控制设备， 包括：
处理器， 用于当一个或多个微站需要在静默子帧 ABS上对边缘用户进 行调度时， 控制设备从所述一个或多个微站中确定出至少一个需要与宏站 联合向所述边缘用户发射信息的微站；
发送器， 用于指示所述宏站和所述需要与宏站联合向所述边缘用户发 射信息的微站， 在所述 ABS上向所述边缘用户发射信息。
结合第六方面， 在第六方面的第一种可能的实现方式中， 所述处理器 具体用于：
当所述 ABS上对边缘用户进行调度的微站的个数为一个时， 确定所述 在所述 ABS上对边缘用户进行调度的微站为需要与宏站联合向所述边缘用 户发射信息的微站； 或者，
当所述 ABS上对边缘用户进行调度的微站的个数为至少两个时， 确定 组合样式， 并根据所述组合样式的效用函数值， 确定需要与宏站联合向所 述边缘用户发射信息的微站， 所述组合样式用于指示每个微站是否与宏站 联合向所述边缘用户发射信息。
结合第六方面的第一种可能的实现方式， 在第六方面的第二种可能的 实现方式中， 处理器具体用于：
对应所述 ABS上的每个资源块 RBG, 根据每个微站是否在所述 RGB 上与宏站联合向所述边缘用户发射信息， 确定多种组合样式；
根据所述 RBG 上每个微站向所述微站调度的边缘用户发射信息的速 率， 确定每种组合样式的效用函数值；
根据效用函数值最大的组合样式确定需要与宏站联合向所述边缘用户 发射信息的微站。
结合第六方面的第二种可能的实现方式， 在第六方面的第三种可能的 实现方式中， 所述处理器确定的所述效用函数值为：
Figure imgf000012_0001
其中， ^表示第 i种组合样式的效用函数值， Ρ 表示所述第 i种组合 样式中第 j个微站调度的边缘用户的比例公平 PF参数， N为所述 ABS上对 边缘用户进行调度的微站的个数， Ρ 的计算公式为： ] (R _avg)]
其中， （^-^);表示所述第 i种组合样式中第 j个微站在所述 RBG上调 度的边缘用户的瞬时速率， （?-avg 表示所述第 i种组合样式中第 j个微站 在所述 RBG上调度的边缘用户的平均速率。 结合第六方面或第六方面的第一种至第三种任一种可能的实现方式， 在第六方面的第四种可能的实现方式中，
所述处理器还用于： 确定宏站对应的第一权值和每个微站对应的第二 权值；
所述发送器还用于： 将所述宏站对应的第一权值发送给所述宏站， 将 所述每个微站对应的第二权值发送给每个微站 , 以使所述宏站和所述每个 微站分别根据所述第一权值和所述每个微站对应的第二权值向所述边缘用 户联合发射信息， 所述每个微站为每个需要与宏站联合向所述边缘用户发 射信息的微站。
结合第六方面的第四种可能的实现方式， 在第六方面的第五种可能的 实现方式中， 所述处理器具体用于：
当所述需要与宏站联合向所述边缘用户发射信息的微站为一个时， 估 计所述边缘用户和所述宏站之间的第一信道矩阵， 以及所述边缘用户和所 述需要与宏站联合向所述边缘用户发射信息的微站之间的第二信道矩阵； 对所述第一信道矩阵的转置进行奇异值 SVD分解得到所述宏站对应的第一 权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述需要与宏 站联合向所述边缘用户发射信息的微站对应的第二权值； 或者，
当同时需要与宏站联合向所述边缘用户发射信息的微站为至少两个 时， 对应所述每个微站以及调度的每个边缘用户， 估计所述每个微站调度 的所述每个边缘用户和所述宏站之间的信道矩阵， 得到对应每个微站的第 一信道矩阵， 以及估计所述每个微站调度的所述每个边缘用户和所述每个 微站之间的第二信道矩阵； 对所述对应每个微站的第一信道矩阵的转置进 行 SVD分解得到多个第一权值， 对所述多个第一权值进行正交化处理， 得 到所述宏站对应的第一权值， 所述第一权值包括对应每个微站的第一权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述每个微站对应的 第二权值。 第七方面， 提供了一种基站， 包括：
接收器， 用于获取控制设备生成的指示信息， 所述指示信息是所述控 制设备确定需要与宏站联合向微站调度的边缘用户发射信息的微站后生成 的， 所述指示信息用于指示在静默子帧 ABS上由宏站和所述需要与宏站联 合向微站调度的边缘用户发射信息的微站向所述边缘用户发射信息；
处理器， 用于根据所述指示信息， 在所述 ABS上向所述边缘用户发射 信息。
结合第七方面， 在第七方面的第一种可能的实现方式中，
所述接收器还用于： 获取所述控制设备得到的权值， 所述权值是所述 控制设备对所述基站与所述边缘用户之间的信道矩阵的转置进行奇异值 SVD分解后得到的；
所述处理器具体用于： 根据所述指示信息， 在所述 ABS上， 根据所述 权值向所述边缘用户发射信息。
结合第七方面的第一种可能的实现方式， 在第七方面的第二种可能的 实现方式中， 当所述基站为宏站， 且同时需要与宏站联合向所述边缘用户 发射信息的微站为至少两个时， 所述接收器获取的所述权值包括相互正交 的分别与每个微站对应的权值。
通过上述技术方案， 本发明实施例由于对微站的边缘用户进行了宏微 联合发射， 可以避免宏站在 ABS上不发送数据引起的资源浪费问题， 降低 宏站资源损失， 另外， 通过宏微联合发射可以进一步提升边缘用户的性能， 增强 elCIC ( Enhanced Inter-Cell Interference Coordination, 增强的小区间干 扰协调） 的性能。
附图说明 为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例描述 中所需要使用的附图作一简单地介绍， 显而易见地， 下面描述中的附图是 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。
图 la为本发明实施例提供的一种异构网络中下行发射方法的流程示意 图；
图 lb为图 la对应的异构网络的结构示意图；
图 2为本发明实施例中确定需要与宏站联合发射的微站的流程示意图； 图 3为本发明实施例中宏微联合发射的流程示意图；
图 4为本发明实施例提供的另一种异构网络中下行发射方法的流程示 意图；
图 5为图 4对应的异构网络的结构示意图；
图 6为本发明实施例提供的一种控制设备的结构示意图；
图 7为本发明实施例提供的另一种控制设备的结构示意图；
图 8为本发明实施例提供的另一种异构网络中下行发射方法的流程示 意图；
图 9为本发明实施例提供的一种基站的结构示意图；
图 10为本发明实施例提供的一种异构***的结构示意图。
具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本 发明实施例中的附图， 对本发明实施例中的技术方案进行清楚、 完整地描 述， 显然， 所描述的实施例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做出创造性劳动前提 下所获得的所有其他实施例， 都属于本发明保护的范围。
图 la为本发明实施例提供的一种异构网络中下行发射方法的流程示意 图， 图 lb为图 la对应的异构网络的结构示意图。
参见图 lb, 本发明实施例给出一种异构网络， 该异构网络包括宏站、 微站以及控制设备。 宏站是指发射功率大于微站的发射功率的站点。 例如， 宏站可以为 Macro eNB , 微站可以为 Pico或者 Femto。 微站的边缘用户是 指该用户到微站的路损 ( pathloss )与该用户到宏站的路损之间的差值在设 定范围内， 例如小于 10dB。 控制设备是指可以对微站和宏站进行集中控制 的设备， 例如， 控制设备可以位于基带处理单元（Base Band Unit, BBU ) 中， 控制设备可以通过光纤等接口与宏站和微站进行通信。
参见图 la, 本实施例的流程可以包括：
11 : 当一个或多个微站需要在 ABS上对边缘用户进行调度时， 控制设 备从所述一个或多个微站中确定出至少一个需要与宏站联合向所述边缘用 户发射信息的微站；
其中， 该控制设备可以是对宏站和微站进行控制的设备， 该控制设备 可以独立于宏站和微站设置， 也可以位于宏站或微站中。 控制设备例如位 于基带处理单元（Base Band Unit, BBU ) 中， 且宏站和微站可以共 BBU。
本发明实施例中， 需要与宏站联合向边缘用户发射信息的微站可以简 称为需要与宏站联合发射的微站。 在异构网络中， 配置的 ABS上进行用户 调度的微站可以为一个或者至少两个， 这些微站中的一个或多个可以为需 要与宏站联合发射的微站。
可以理解的是， 本发明实施例中， "联合发射" 可以是指宏站和微站共 同向该微站的边缘用户发射信息。 在具体发射时， 宏站和微站可以釆用不 同的权值， 例如， 宏站对应的权值为 wl , 站对应的权值为 w2, 宏站和 微站共同要发射的信息为 X , 则宏站向该边缘用户发射的信息为 wl χ χ , 微 站向该边缘用户发射的信息为 w2 x。
可以理解的是，本发明实施例中， "发射信息"也可以称为 "发射信号"、 或者 "发射数据" 等。 可选的， 控制设备从所述一个或多个微站中确定出至少一个需要与宏 站联合向所述边缘用户发射信息的微站， 可以包括：
当所述 ABS上对边缘用户进行调度的微站的个数为一个时， 确定所述 在所述 ABS上对边缘用户进行调度的微站为需要与宏站联合向所述边缘用 户发射信息的微站； 或者，
当所述 ABS上对边缘用户进行调度的微站的个数为至少两个时， 确定 组合样式， 并根据所述组合样式的效用函数值， 确定需要与宏站联合向所 述边缘用户发射信息的微站， 所述组合样式用于指示每个微站是否与宏站 联合向所述边缘用户发射信息。
上述的在 ABS上对边缘用户进行调度的微站的个数可以由控制设备检 测得到。
上述的组合样式可以根据至少两个微站与宏站是否联合发射的组合情 况确定， 例如， 每个微站是否与宏站联合发射的情况就是两种， 即不联合 发射和联合发射， 再将多个微站对应的每种情况进行组合， 就可以得到多 种组合样式。 例如， 上述的微站个数为两个时， 存在四种组合情况， 即第 一个微站不与宏站联合发射且第二个微站也不与宏站联合发射， 第一个微 站与宏站联合发射且第二个微站不与宏站联合发射， 第一个微站不与宏站 联合发射且第二个微站与宏站联合发射， 第一个微站与宏站联合发射且第 二个微站也与宏站联合发射， 因此， 此时的组合样式为四种。
具体如， 当在 ABS上对边缘用户进行调度的微站的个数为 Ν个时， 组 合样式可以表示为： Ρ 2 > , " {0，1}，' = 1，2，'"，N , 其中， j表示第 j个 基站， uj用于表示第 j个微站是否与宏站联合发射， 例如， = Q可以表示 第 j个微站不需要与宏站联合发射， 也就是第 j个微站单独为其边缘用户发 射下行数据； = 1可以表示第 j个微站需要与宏站联合发射。
假设上述微站的个数为 N, 由于每个微站都有两种情况（即可以与宏 站联合发射， 也可以不与宏站联合发射）， 那么这 N个微站可以形成 2 种 组合样式。
控制设备可以确定上述 2 种组合样式中每种组合样式的效用函数值， 根据效用函数值最大的组合样式确定需要与宏站联合发射的微站。
可选的，参见图 2,确定组合样式，并根据所述组合样式的效用函数值， 确定需要与宏站联合向所述边缘用户发射信息的微站， 可以包括：
21 : 对应 ABS上每个资源块（Resource Block Group, RBG ), 根据每 个微站是否在所述 RBG上与宏站联合向所述边缘用户发射信息， 确定多种 组合样式；
该多种组合样式可以组成组合样式集。
RBG是微站调度用户的基本资源单位，在每个 RBG上，一个微站通常 只能调度一个用户。
当微站个数为 N时， 在每个 RBG上， 该组合样式集包括的组合样式的 个数为： 2N 。
22: 根据所述 RBG上每个微站向所述微站调度的边缘用户发射信息的 速率， 确定每种组合样式的效用函数值。
组合样式的效用函数值的计算公式可以为：
Figure imgf000018_0001
其中， ^表示第 i种组合样式的效用函数值， ^ 表示第 i种组合样式 中第 j个微站调度的边缘用户的比例公平 （ Proportional Fair, PF )参数， N 为 ABS上对边缘用户进行调度的微站的个数， PF]的计算公式为： 1 (R_avg)]
其中， （R-^);表示第 种组合样式中第 j个微站在该 RBG上调度的边 缘用户的瞬时速率，（?-avg 表示第 i种组合样式中第 j个微站在该 RBG上 调度的边缘用户的平均速率。
上述的瞬时速率和平均速率可以是指下行速率， 即基站向该边缘用户 发射信息时的速率。
每个边缘用户的瞬时速率可以根据该边缘用户的用户设备 ( User Equipment, UE )上 4艮的信道质量指示（ Channel Quality Indicator, CQI )计 算得到， 例如， 可以釆用现有技术中根据 CQI得到边缘用户的瞬时速率。
边缘用户的平均速率是指该 RBG上调度的边缘用户在设定时间段内对 瞬时速率进行平均后得到的平均速率。
边缘用户的瞬时速率可以根据传输时间间隔 （ Transmission Time Interval, TTI )得到， 即可以统计每个 TTI 内的下行数据量， 根据该 ΤΉ 内的下行数据量以及该 TTI占用的时间， 得到每个 TTI对应的瞬时速率， 在该 RBG上调度的边缘用户的瞬时速率，将设定个数的 TTI对应的瞬时速 率进行平均后得到上述的第 j个微站在该 RBG上调度的边缘用户的平均速 率。
23: 根据效用函数值最大的组合样式确定需要与宏站联合向所述边缘 用户发射信息的微站。
具体可以是指将效用函数值最大的组合样式中表明需要与宏站联合发 射的微站确定为最终的需要与宏站联合发射的微站。 例如， ^ 1，… ）的效用函数值最大， 则将 = 1的微站， 也就是该组合 样式中表明需要与宏站联合发射的微站， 例如， 第二个微站为需要与宏站 联合发射的微站。 可以理解的是， 组合样式可以用于表明一个或多个微站 需要与宏站进行联合发射， 例如， 当效用函数值最大的组合样式中存在多 个"' = 1的微站， 那么需要与宏站联合发射的微站包括该多个"' = 1的微站。
12: 所述控制设备指示所述宏站和所述需要与宏站联合向所述边缘用 户发射信息的微站， 在所述 ABS上向所述边缘用户发射信息。 其中， 当控制设备与宏站和微站都不位于同一设备中时， 可以是控制 设备向宏站和微站发送指示信息， 以指示所述宏站和微站进行上述的联合 发射。 或者， 当控制设备与宏站和微站中的一个位于同一设备中时， 可以 是控制设备向不位于同一设备中的基站 （宏站或微站）发送指示信息， 向 位于同一设备中的基站 （微站或宏站）通过内部接口传输指示信息， 以便 宏站和微站进行上述的联合发射。
参见图 3 , 进行联合发射的流程可以包括：
31 : 确定第一权值和第二权值， 第一权值为宏站在联合发射时釆用的 系数， 第二权值为微站在联合发射时釆用的系数。
例如， 在联合发射时， 宏站和微站生成的原始信号是相同的， 用 X表 示， 第一权值用 wl表示， 第二权值用 w2表示， 那么在联合发射时， 宏站 发射的信号为 wl X X , 微站发射的信号为 w2 x。
可选的， 确定第一权值和第二权值， 可以包括：
分别计算每个微站的边缘用户和宏站之间的第一信道矩阵， 以及计算 每个微站的边缘用户和该微站之间的第二信道矩阵。 其中， 该微站是指需 要与宏站联合发射的微站， 该微站的边缘用户可以发射测量参考信号 ( Sounding Reference Signal, SRS )信号， 宏站根据接收的 SRS信号可以 估计出第一信道矩阵，微站根据接收的 SRS信号可以估计出第二信道矩阵； 根据 SRS信号得到上述的第一信道矩阵和第二信道矩阵可以釆用现有通用 的信道估计算法。
对第一信道矩阵的转置进行奇异值 ( Singular Value Decomposition, SVD )分解， 得到第一权值， 对第二信道矩阵的转置进行 SVD分解， 得到 第二权值。
例如， 在 SVD分解时， 可以得到 U、 S和 V矩阵， 可以将 V矩阵的共 轭转置确定为上述的权值。 其中， 对第一信道矩阵的转置进行 SVD分解时 得到第一权值， 对第二信道矩阵的转置进行 SVD分解时得到第二权值。 进一步的， 当宏站同时与至少两个微站进行联合发射时， 可以对每个 微站对应第一权值进行正交处理， 使得不同微站对应的不同的第一权值相 互正交。 例如， 当宏站同时与第一微站和第二微站联合发射时， 宏站可以 根据每个微站的边缘用户发射的 SRS信号进行估计得到与每个微站对应的 第一信道矩阵， 然后将与每个微站对应的第一信道矩阵的转置进行 SVD分 解后可以得到： 与第一微站对应的第一权值以及与第二微站对应的第一权 值。 即， 宏站可以根据第一微站调度的边缘用户发射的 SRS信号进行估计 得到第一微站调度的边缘用户与宏站之间的第一信道矩阵， 宏站根据第二 微站调度的边缘用户发射的 SRS信号进行估计得到第二微站调度的边缘用 户与宏站之间的第一信道矩阵， 对第一微站调度的边缘用户与宏站之间的 第一信道矩阵的转置进行 SVD分解后得到第一微站对应的第一权值， 对第 二微站调度的边缘用户与宏站之间的第一信道矩阵的转置进行 SVD分解后 得到第二微站对应的第一权值， 之后可以对这两个第一权值进行正交化处 理， 以使宏站釆用正交化处理后的第一权值分别与第一微站和第二微站进 行联合发射。
即， 可选的， 确定宏站对应的第一权值和每个微站对应的第二权值 , 包括：
当所述需要与宏站联合向所述边缘用户发射信息的微站为一个时， 估 计所述边缘用户和所述宏站之间的第一信道矩阵， 以及所述边缘用户和所 述需要与宏站联合向所述边缘用户发射信息的微站之间的第二信道矩阵； 对所述第一信道矩阵的转置进行奇异值 SVD分解得到所述宏站对应的第一 权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述需要与宏 站联合向所述边缘用户发射信息的微站对应的第二权值； 或者，
当同时需要与宏站联合向所述边缘用户发射信息的微站为至少两个 时， 对应所述每个微站以及调度的每个边缘用户， 估计所述每个微站调度 的所述每个边缘用户和所述宏站之间的信道矩阵， 得到对应每个微站的第 一信道矩阵， 以及估计所述每个微站调度的所述每个边缘用户和所述每个 微站之间的第二信道矩阵； 对所述对应每个微站的第一信道矩阵的转置进 行 SVD分解得到多个第一权值， 对所述多个第一权值进行正交化处理， 得 到所述宏站对应的第一权值， 所述第一权值包括对应每个微站的第一权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述每个微站对应的 第二权值。
可以理解的是， 由于所述需要与宏站联合向所述边缘用户发射信息的 微站可以对应 ABS的每个 RBG确定， 因此， 当所述需要与宏站联合向所 述边缘用户发射信息的微站为一个时， 上述的边缘用户是指该需要与宏站 联合向所述边缘用户发射信息的微站在该 RBG上调度的边缘用户。 当所述 需要与宏站联合向所述边缘用户发射信息的微站为至少两个时， 上述的每 个微站调度的所述每个边缘用户是指每个微站对应每个 RBG, 该微站在该 RBG上调度的边缘用户。
32: 将所述第一权值通知给所述宏站， 将所述第二权值通知给所述微 站， 使得所述宏站釆用所述第一权值， 以及所述微站釆用所述第二权值， 对所述微站的边缘用户进行联合发射。
其中， 上述的通知可以是当控制设备与宏站和微站独立设置时， 控制 设备将第一权值和第二权重分别发送给宏站和微站， 当控制设备与其中一 个基站位于同一设备时， 上述的通知可以是通过设备内部接口进行通知。
上述的联合发射可以是指宏站和微站根据各自收到的权值对原始的相 同信号进行加权后发送给微站的边缘用户。 例如， 与宏站联合发射的微站 为第一微站，则控制设备可以将第一权值发送给宏站，第一权值用 wl表示， 控制设备将第二权值发送给第一微站， 第二权值用 w2表示，假设宏站和微 站原始生成的相同的信号用 X表示， 则宏站向第一微站的边缘用户发射的 信号为 wl χ χ , 第一微站向该第一微站的边缘用户发射的信号为 w2 x x。
本实施例通过对微站的边缘用户进行了宏微联合发射， 可以避免宏站 在 ABS子帧上不发送数据引起的资源浪费问题， 降低宏站资源损失。 进一 步地， 通过宏微联合发射可以进一步提升边缘用户的性能， 增强 elCIC 的 性能。
图 4为本发明实施例提供的另一种异构网络中下行发射方法的流程示 意图， 图 5为图 4对应的异构网络的结构示意图， 本实施例中， 在 ABS上 调度边缘用户的微站包括第一微站和第二微站， 调度的边缘用户分别为第 一 UE和第二 UE。 本实施例的宏站可以是 marco, 微站可以是 micro、 pico 或者 Femto„
参见图 4, 本实施例包括：
41 : 对应每个 RBG, 确定每个微站调度的边缘用户。
在 ABS 的每个 RBG上可以根据用户的优先级确定被微站调度的用 户。， 例如， 将优先级最高的用户确定为被微站调度的用户， 用户的优先级 可以根据 PF、 信干噪比 （Signal to Interference plus Noise Ratio, SINR )等 确定。 确定微站在每个 RBG上调度的用户后， 可以根据每个 RBG上调度 的用户与微站之间的路损以及每个 RGB上调度的用户与宏站之间的路损确 定该 RGB上调度的用户是否为边缘用户， 例如， 当两个路损的差值在设定 范围内时可以确定该用户为边缘用户， 否则为非边缘用户。 通过此方法， 可以确定每个 RBG调度的用户是否为边缘用户。 一旦清楚每个 RBG对应 的用户是否为边缘用户后， 每个微站调度的边缘用户也就确定了。
如图 5所示， 第一微站调度的边缘用户为第一 UE, 第二微站调度的边 缘用户为第二 UE。
42: 对应该 RBG, 根据是否需要与宏站联合发射的微站的可能的组合 方式， 生成组合样式。
例如， 当微站为两个时， 该可能的组合样式包括： P(0,0), Ρ(0,1)、 Ρ(1,0) 和 P(l,l), 其中， Ρ(0,0)表示两个微站均独立发射， Ρ(0,1)表示第一个微站独 立发射， 第二个微站和宏站联合发射， Ρ(1,0)表示第一个微站和宏站联合发 射， 第二个微站独立发射， P(l,l)表示两个微站均与宏站联合发射。
43: 根据边缘用户的速率， 计算每种组合样式的效用函数值。
例如， 可以根据瞬时速率和平均速率计算， 或者根据瞬时速率计算， 具体计算公式可以参见 22所示的内容。
44: 根据效用函数值最大的组合样式， 进行宏微联合发射。
例如， P(0,1)的效用函数值最大， 则在该 RBG上只对图 5 的第二 UE 进行宏微联合发射， 第一 UE由第一微站单独发射， 宏站不对其发射。
本实施例在 ABS子帧， 宏站和微站对微站边缘用户联合发射， 可以提 升微站边缘用户的性能， 弥补宏站 ABS的损失， 增强静态 elCIC的性能。
图 6为本发明实施例提供的一种控制设备的结构示意图， 该设备可以 为控制宏站和微站的控制设备，该设备 60包括确定模块 61和指示模块 62; 确定模块 61用于当一个或多个微站需要在 ABS上对边缘用户进行调度时， 控制设备从所述一个或多个微站中确定出至少一个需要与宏站联合向所述 边缘用户发射信息的微站； 指示模块 62用于指示所述宏站和所述需要与宏 站联合向所述边缘用户发射信息的微站， 在所述 ABS上向所述边缘用户发 射信息。
可选的， 所述确定模块具体用于：
当所述 ABS上对边缘用户进行调度的微站的个数为一个时， 确定所述 在所述 ABS上对边缘用户进行调度的微站为需要与宏站联合向所述边缘用 户发射信息的微站； 或者，
当所述 ABS上对边缘用户进行调度的微站的个数为至少两个时， 确定 组合样式， 并根据所述组合样式的效用函数值， 确定需要与宏站联合向所 述边缘用户发射信息的微站， 所述组合样式用于指示每个微站是否与宏站 联合向所述边缘用户发射信息。
可选的， 所述确定模块具体用于：
对应所述 ABS上的每个 RBG, 根据每个微站是否在所述 RGB上与宏 站联合向所述边缘用户发射信息， 确定多种组合样式；
根据所述 RBG 上每个微站向所述微站调度的边缘用户发射信息的速 率， 确定每种组合样式的效用函数值；
根据效用函数值最大的组合样式确定需要与宏站联合向所述边缘用户 发射信息的微站。
可选的， 所述确定模块确定的所述效用函数值为：
Figure imgf000025_0001
其中， ^表示第 i种组合样式的效用函数值， Ρ 表示所述第 i种组合 样式中第 j个微站调度的边缘用户的比例公平 PF参数， N为所述 ABS上对 边缘用户进行调度的微站的个数， Ρ 的计算公式为： 1 (R_avg)]
其中， （^_^)；表示所述第 i种组合样式中第 j个微站在所述 上调 度的边缘用户的瞬时速率， （?-avg 表示所述第 i种组合样式中第 j个微站 在所述 RBG上调度的边缘用户的平均速率。
可选的， 所述确定模块还用于： 确定宏站对应的第一权值和每个微站 对应的第二权值， 所述每个微站为每个需要与宏站联合向所述边缘用户发 射信息的微站； 所述指示模块还用于： 将所述宏站对应的第一权值发送给 所述宏站， 将所述每个微站对应的第二权值发送给每个微站， 以使所述宏 站和所述每个微站分别根据所述第一权值和所述每个微站对应的第二权值 向所述边缘用户联合发射信息。
可选的， 所述确定模块具体用于：
当所述需要与宏站联合向所述边缘用户发射信息的微站为一个时， 估 计所述边缘用户和所述宏站之间的第一信道矩阵， 以及所述第一边缘用户 和所述需要与宏站联合向所述边缘用户发射信息的微站之间的第二信道矩 阵； 对所述第一信道矩阵的转置进行 SVD分解得到所述宏站对应的第一权 值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述需要与宏站 联合向所述边缘用户发射信息的微站对应的第二权值； 或者，
当同时需要与宏站联合向所述边缘用户发射信息的微站为至少两个 时， 对应所述每个微站以及调度的每个边缘用户， 估计所述每个微站调度 的所述每个边缘用户和所述宏站之间的信道矩阵， 得到对应每个微站的第 一信道矩阵， 以及估计所述每个微站调度的所述每个边缘用户和所述每个 微站之间的第二信道矩阵； 对所述对应每个微站的第一信道矩阵的转置进 行 SVD分解得到多个第一权值， 对所述多个第一权值进行正交化处理， 得 到所述宏站对应的第一权值， 所述第一权值包括对应每个微站的第一权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述每个微站对应的 第二权值。
如图 7所示， 提供了另一种控制设备， 该设备 70包括处理器 71和发 送器 72, 处理器 71用于当一个或多个微站需要在 ABS上对边缘用户进行 调度时， 控制设备从所述一个或多个微站中确定出至少一个需要与宏站联 合向所述边缘用户发射信息的微站； 发送器 72用于指示所述宏站和所述需 要与宏站联合向所述边缘用户发射信息的微站， 在所述 ABS上向所述边缘 用户发射信息。
可选的， 处理器具体用于：
当所述 ABS上对边缘用户进行调度的微站的个数为一个时， 确定所述 在所述 ABS上对边缘用户进行调度的微站为需要与宏站联合向所述边缘用 户发射信息的微站； 或者，
当所述 ABS上对边缘用户进行调度的微站的个数为至少两个时， 确定 组合样式， 并根据所述组合样式的效用函数值， 确定需要与宏站联合向所 述边缘用户发射信息的微站， 所述组合样式用于指示每个微站是否与宏站 联合向所述边缘用户发射信息。 可选的， 处理器具体用于：
对应所述 ABS上的每个 RBG, 根据每个微站是否在所述 RGB上与宏 站联合向所述边缘用户发射信息， 确定多种组合样式；
根据所述 RBG 上每个微站向所述微站调度的边缘用户发射信息的速 率， 确定每种组合样式的效用函数值；
根据效用函数值最大的组合样式确定需要与宏站联合向所述边缘用户 发射信息的微站。
可选的， 处理器确定的所述效用函数值为：
Figure imgf000027_0001
其中， ^表示第 i种组合样式的效用函数值， Ρ 表示所述第 i种组合 样式中第 j个微站调度的边缘用户的比例公平 PF参数， N为所述 ABS上对 边缘用户进行调度的微站的个数， Ρ 的计算公式为：
其中， （^_^)；表示所述第 i种组合样式中第 j个微站在所述 RBG上调 度的边缘用户的瞬时速率， （?-avg 表示所述第 i种组合样式中第 j个微站 在所述 RBG上调度的边缘用户的平均速率。
可选的， 所述处理器还用于： 确定宏站对应的第一权值和每个微站对 应的第二权值， 所述每个微站为每个需要与宏站联合向所述边缘用户发射 信息的微站； 所述发送器还用于： 将所述宏站对应的第一权值发送给所述 宏站， 将所述每个微站对应的第二权值发送给每个微站， 以使所述宏站和 所述每个微站分别根据所述第一权值和所述每个微站对应的第二权值向所 述边缘用户联合发射信息。
可选的， 处理器具体用于：
当所述需要与宏站联合向所述边缘用户发射信息的微站为一个时， 估 计所述边缘用户和所述宏站之间的第一信道矩阵， 以及所述边缘用户和所 述需要与宏站联合向所述边缘用户发射信息的微站之间的第二信道矩阵； 对所述第一信道矩阵的转置进行 SVD分解得到所述宏站对应的第一权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述需要与宏站联合 向所述边缘用户发射信息的微站对应的第二权值； 或者，
当同时需要与宏站联合向所述边缘用户发射信息的微站为至少两个 时， 对应所述每个微站以及调度的每个边缘用户， 估计所述每个微站调度 的所述每个边缘用户和所述宏站之间的信道矩阵， 得到对应每个微站的第 一信道矩阵， 以及估计所述每个微站调度的所述每个边缘用户和所述每个 微站之间的第二信道矩阵； 对所述对应每个微站的第一信道矩阵的转置进 行 SVD分解得到多个第一权值， 对所述多个第一权值进行正交化处理， 得 到所述宏站对应的第一权值， 所述第一权值包括对应每个微站的第一权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述每个微站对应的 第二权值。
可以理解的是， 该设备还可以包括接收器、 存储器、 输入输出装置等 通用部件。
本实施例通过对微站的边缘用户进行了宏微联合发射， 可以避免宏站 在 ABS子帧上不发送数据引起的资源浪费问题， 降低宏站资源损失。 进一 步地， 通过宏微联合发射可以进一步提升边缘用户的性能， 增强 elCIC 的 性能。
上面描述了控制设备侧的流程， 参见图 8, 基站侧可以执行：
81 : 基站获取控制设备生成的指示信息， 所述指示信息是所述控制设 备确定需要与宏站联合向微站调度的边缘用户发射信息的微站后生成的， 所述指示信息用于指示在 ABS上由宏站和所述需要与宏站联合向微站调度 的边缘用户发射信息的微站向所述边缘用户发射信息；
其中， 当控制设备和基站位于不同设备中时， 可以是控制设备将指示 信息发送给基站； 当控制设备和基站位于同一设备中时， 可以是控制设备 通过内部接口传输指示信息。
控制设备确定需要与宏站联合发射的微站的具体内容可以参见上述对 控制设备的描述。
82: 所述基站根据所述指示信息， 在所述 ABS上向所述边缘用户发射 信息。
可选的， 所述基站根据所述指示信息， 在所述 ABS上向所述边缘用户 发射信息之前， 所述方法还包括：
所述基站获取所述控制设备得到的权值， 所述权值是所述控制设备对 所述基站与所述边缘用户之间的信道矩阵的转置进行奇异值 SVD分解后得 到的； 所述在所述 ABS 上向所述边缘用户发射信息， 包括： 在所述 ABS 上， 根据所述权值向所述边缘用户发射信息。
其中， 当该基站为宏站时， 接收的权值可以为第一权重， 当该基站为 微站时， 接收的权值可以为第二权值， 第一权值和第二权值的具体计算方 法可以参见上述控制设备的描述。
可选的， 当所述基站为宏站， 且同时需要与宏站联合向所述边缘用户 发射信息的微站为至少两个时， 所述宏站获取的所述权值包括相互正交的 分别与每个微站对应的权值。 例如， 控制设备对 SVD分解后得到的多个第 一权值进行正交化得到正交化后的第一权值并发送给宏站。 具体内容可以 参见控制设备的描述。
相应的， 本发明实施例还提供了一种基站， 参见图 9, 该基站 90包括 获取模块 91和处理模块 92; 获取模块 91用于获取控制设备生成的指示信 息， 所述指示信息是所述控制设备确定需要与宏站联合向微站调度的边缘 用户发射信息的微站后生成的， 所述指示信息用于指示在静默子帧 ABS上 由宏站和所述需要与宏站联合向微站调度的边缘用户发射信息的微站向所 述边缘用户发射信息； 处理模块 92 用于根据所述指示信息， 在所述 ABS 可选的， 所述获取模块还用于： 获取所述控制设备得到的权值， 所述 权值是所述控制设备对所述基站与所述边缘用户之间的信道矩阵的转置进 行奇异值 SVD分解后得到的；
所述处理模块具体用于： 根据所述指示信息， 在所述 ABS上， 根据所 述权值向所述边缘用户发射信息。
可选的， 当所述基站为宏站， 且同时需要与宏站联合向所述边缘用户 发射信息的微站为至少两个时， 所述获取模块获取的所述权值包括相互正 交的分别与每个微站对应的权值。
在硬件实现上， 上述的获取模块可以具体为接收器或收发器， 上述的 处理模块可以具体为处理器。 另外， 该基站还可以包括存储器、 天线、 基 带处理部件、 中射频处理部件、 输入输出装置等通用部件。
即， 该基站可以包括接收器和处理器， 接收器用于获取控制设备生成 的指示信息， 所述指示信息是所述控制设备确定需要与宏站联合向微站调 度的边缘用户发射信息的微站后生成的， 所述指示信息用于指示在静默子 帧 ABS上由宏站和所述需要与宏站联合向微站调度的边缘用户发射信息的 微站向所述边缘用户发射信息；处理器用于根据所述指示信息，在所述 ABS 上向所述边缘用户发射信息。
可选的， 所述接收器还用于： 获取所述控制设备得到的权值， 所述权 值是所述控制设备对所述基站与所述边缘用户之间的信道矩阵的转置进行 奇异值 SVD分解后得到的； 所述处理器具体用于： 根据所述指示信息， 在 所述 ABS上， 根据所述权值向所述边缘用户发射信息。
可选的， 当所述基站为宏站， 且同时需要与宏站联合向所述边缘用户 发射信息的微站为至少两个时， 所述接收器获取的所述权值包括相互正交 的分别与每个微站对应的权值。
本实施例通过对微站的边缘用户进行了宏微联合发射， 可以避免宏站 在 ABS子帧上不发送数据引起的资源浪费问题， 降低宏站资源损失， 进一 步地， 通过宏微联合发射可以进一步提升边缘用户的性能， 增强 elCIC 的 性能。
参见图 10, 本发明实施例还提供了一种异构***， 该*** 100包括宏 站 101和微站 102; 所述宏站 101用于根据控制设备生成的指示信息， 在 ABS上向所述微站的边缘用户发射信息； 以及， 所述微站 102用于根据控 制设备生成的指示信息， 在所述 ABS上向所述边缘用户发射信息； 所述指 示信息是所述控制设备确定需要与宏站联合向微站调度的边缘用户发射信 息的微站后生成的， 所述指示信息用于指示在静默子帧 ABS上由宏站和所 述需要与宏站联合向微站调度的边缘用户发射信息的微站向所述边缘用户 发射信息。
可选的， 所述宏站 101 还用于获取所述控制设备得到的第一权值， 所 述第一权值是所述控制设备对所述边缘用户和所述宏站之间的第一信道矩 阵的转置进行 SVD 分解后得到的， 以便根据所述指示信息， 在所述 ABS 上釆用所述第一权值向所述边缘用户发射信息； 所述微站 102还用于获取 所述控制设备发送的第二权值， 所述第二权值是所述控制设备对所述边缘 用户和所述微站之间的第二信道矩阵的转置进行 SVD分解后得到的， 以便 根据所述指示信息， 在所述 ABS上釆用所述第二权值向所述边缘用户发射 信息。
可选的， 当同时需要与宏站联合向所述边缘用户发射信息的微站为至 少两个时， 所述宏站获取的所述第一权值包括相互正交的分别与每个同时 需要与宏站联合向所述边缘用户发射信息的微站对应的权值。
本实施例通过对微站的边缘用户进行了宏微联合发射， 可以避免宏站 在 ABS子帧上不发送数据引起的资源浪费问题， 降低宏站资源损失。 进一 步地， 通过宏微联合发射可以进一步提升边缘用户的性能， 增强 elCIC 的 性能。 所属领域的技术人员可以清楚地了解到， 为描述的方便和简洁， 仅以 上述各功能模块的划分进行举例说明， 实际应用中， 可以根据需要而将上 述功能分配由不同的功能模块完成， 即将装置的内部结构划分成不同的功 能模块， 以完成以上描述的全部或者部分功能。 上述描述的***， 装置和 单元的具体工作过程， 可以参考前述方法实施例中的对应过程， 在此不再 赘述。
在本申请所提供的几个实施例中， 应该理解到， 所揭露的***， 装置 和方法， 可以通过其它的方式实现。 例如， 以上所描述的装置实施例仅仅 是示意性的， 例如， 所述模块或单元的划分， 仅仅为一种逻辑功能划分， 实际实现时可以有另外的划分方式， 例如多个单元或组件可以结合或者可 以集成到另一个***， 或一些特征可以忽略， 或不执行。 另一点， 所显示 或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口， 装 置或单元的间接耦合或通信连接， 可以是电性， 机械或其它的形式。 作为单元显示的部件可以是或者也可以不是物理单元， 即可以位于一个地 方， 或者也可以分布到多个网络单元上。 可以根据实际的需要选择其中的 部分或者全部单元来实现本实施例方案的目的。
另外， 在本申请各个实施例中的各功能单元可以集成在一个处理单元 中， 也可以是各个单元单独物理存在， 也可以两个或两个以上单元集成在 一个单元中。 上述集成的单元既可以釆用硬件的形式实现， 也可以釆用软 件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销 售或使用时， 可以存储在一个计算机可读取存储介质中。 基于这样的理解， 本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方 案的全部或部分可以以软件产品的形式体现出来， 该计算机软件产品存储 在一个存储介质中， 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， 或者控制设备等）或处理器（processor )执行本申请各个 实施例所述方法的全部或部分步骤。 而前述的存储介质包括： U盘、 移动 硬盘、 只读存储器（ROM, Read-Only Memory ), 随机存取存储器（RAM, Random Access Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。
以上所述， 以上实施例仅用以说明本申请的技术方案， 而非对其限制； 尽管参照前述实施例对本申请进行了详细的说明， 本领域的普通技术人员 应当理解： 其依然可以对前述各实施例所记载的技术方案进行修改， 或者 对其中部分技术特征进行等同替换； 而这些修改或者替换， 并不使相应技 术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims

权利要求
1、 一种异构网络中下行发射方法， 其特征在于， 包括：
当一个或多个微站需要在静默子帧 ABS上对边缘用户进行调度时， 控 制设备从所述一个或多个微站中确定出至少一个需要与宏站联合向所述边 缘用户发射信息的微站；
所述控制设备指示所述宏站和所述需要与宏站联合向所述边缘用户发 射信息的微站， 在所述 ABS上向所述边缘用户发射信息。
2、 根据权利要求 1所述的方法， 其特征在于， 所述控制设备从所述一 个或多个微站中确定出至少一个需要与宏站联合向所述边缘用户发射信息 的微站， 包括：
当所述 ABS上对边缘用户进行调度的微站的个数为一个时， 确定所述 在所述 ABS上对边缘用户进行调度的微站为需要与宏站联合向所述边缘用 户发射信息的微站； 或者，
当所述 ABS上对边缘用户进行调度的微站的个数为至少两个时， 确定 组合样式， 并根据所述组合样式的效用函数值， 确定需要与宏站联合向所 述边缘用户发射信息的微站， 所述组合样式用于指示每个微站是否与宏站 联合向所述边缘用户发射信息。
3、 根据权利要求 2所述的方法， 其特征在于， 所述确定组合样式， 并 根据所述组合样式的效用函数值， 确定需要与宏站联合向所述边缘用户发 射信息的微站， 包括：
对应所述 ABS上的每个资源块 RBG, 根据每个微站是否在所述 RGB 上与宏站联合向所述边缘用户发射信息， 确定多种组合样式；
根据所述 RBG 上每个微站向所述微站调度的边缘用户发射信息的速 率， 确定每种组合样式的效用函数值；
根据效用函数值最大的组合样式确定需要与宏站联合向所述边缘用户 发射信息的微站。
4、 根据权利要求 3所述的方法， 其特征在于， 所述根据所述 RBG上 每个微站向所述微站调度的边缘用户发射信息的速率， 确定每种组合样式 的效用函数值为：
Figure imgf000035_0001
其中， ^表示第 i种组合样式的效用函数值， Ρ 表示所述第 i种组合 样式中第 j个微站调度的边缘用户的比例公平 PF参数， N为所述 ABS上对 边缘用户进行调度的微站的个数， Ρ 的计算公式为：
其中， （^_^)；表示所述第 i种组合样式中第 j个微站在所述 RBG上调 度的边缘用户的瞬时速率， （?-avg 表示所述第 i种组合样式中第 j个微站 在所述 RBG上调度的边缘用户的平均速率。
5、 根据权利要求 1-4任一项所述的方法， 其特征在于， 所述指示所述 宏站和所述需要与宏站联合向所述边缘用户发射信息的微站， 在所述 ABS 上向所述边缘用户发射信息， 包括：
确定宏站对应的第一权值和每个微站对应的第二权值， 将所述宏站对 应的第一权值发送给所述宏站， 将所述每个微站对应的第二权值发送给每 个微站， 以使所述宏站和所述每个微站分别根据所述第一权值和所述每个 微站对应的第二权值向所述边缘用户联合发射信息， 所述每个微站为每个 需要与宏站联合向所述边缘用户发射信息的微站。
6、 根据权利要求 5所述的方法， 其特征在于， 所述确定宏站对应的第 一权值和每个微站对应的第二权值， 包括：
当所述需要与宏站联合向所述边缘用户发射信息的微站为一个时， 估 计所述边缘用户和所述宏站之间的第一信道矩阵， 以及所述边缘用户和所 述需要与宏站联合向所述边缘用户发射信息的微站之间的第二信道矩阵； 对所述第一信道矩阵的转置进行奇异值 SVD分解得到所述宏站对应的第一 权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述需要与宏 站联合向所述边缘用户发射信息的微站对应的第二权值； 或者，
当同时需要与宏站联合向所述边缘用户发射信息的微站为至少两个 时， 对应所述每个微站以及调度的每个边缘用户， 估计所述每个微站调度 的所述每个边缘用户和所述宏站之间的信道矩阵， 得到对应每个微站的第 一信道矩阵， 以及估计所述每个微站调度的所述每个边缘用户和所述每个 微站之间的第二信道矩阵； 对所述对应每个微站的第一信道矩阵的转置进 行 SVD分解得到多个第一权值， 对所述多个第一权值进行正交化处理， 得 到所述宏站对应的第一权值， 所述第一权值包括对应每个微站的第一权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述每个微站对应的 第二权值。
7、 一种异构网络中下行发射方法， 其特征在于， 包括：
基站获取控制设备生成的指示信息， 所述指示信息是所述控制设备确 定需要与宏站联合向微站调度的边缘用户发射信息的微站后生成的， 所述 指示信息用于指示在静默子帧 ABS上由宏站和所述需要与宏站联合向微站 调度的边缘用户发射信息的微站向所述边缘用户发射信息；
所述基站根据所述指示信息，在所述 ABS上向所述边缘用户发射信息。
8、 根据权利要求 7所述的方法， 其特征在于， 所述基站根据所述指示 信息， 在所述 ABS上向所述边缘用户发射信息之前， 所述方法还包括： 所述基站获取所述控制设备得到的权值， 所述权值是所述控制设备对 所述基站与所述边缘用户之间的信道矩阵的转置进行奇异值 SVD分解后得 到的；
所述在所述 ABS上向所述边缘用户发射信息， 包括：
在所述 ABS上， 根据所述权值向所述边缘用户发射信息。
9、 根据权利要求 8所述的方法， 其特征在于， 当所述基站为宏站， 且 同时需要与宏站联合向所述边缘用户发射信息的微站为至少两个时， 所述 宏站获取的所述权值包括相互正交的分别与每个微站对应的权值。
10、 一种控制设备， 其特征在于， 包括：
确定模块， 用于当一个或多个微站需要在静默子帧 ABS上对边缘用户 进行调度时， 控制设备从所述一个或多个微站中确定出至少一个需要与宏 站联合向所述边缘用户发射信息的微站；
指示模块， 用于指示所述宏站和所述需要与宏站联合向所述边缘用户 发射信息的微站， 在所述 ABS上向所述边缘用户发射信息。
11、 根据权利要求 10所述的设备， 其特征在于， 所述确定模块具体用 于：
当所述 ABS上对边缘用户进行调度的微站的个数为一个时， 确定所述 在所述 ABS上对边缘用户进行调度的微站为需要与宏站联合向所述边缘用 户发射信息的微站； 或者，
当所述 ABS上对边缘用户进行调度的微站的个数为至少两个时， 确定 组合样式， 并根据所述组合样式的效用函数值， 确定需要与宏站联合向所 述边缘用户发射信息的微站， 所述组合样式用于指示每个微站是否与宏站 联合向所述边缘用户发射信息。
12、 根据权利要求 11所述的设备， 其特征在于， 所述确定模块具体用 于：
对应所述 ABS上的每个资源块 RBG, 根据每个微站是否在所述 RGB 上与宏站联合向所述边缘用户发射信息， 确定多种组合样式；
根据所述 RBG 上每个微站向所述微站调度的边缘用户发射信息的速 率， 确定每种组合样式的效用函数值；
根据效用函数值最大的组合样式确定需要与宏站联合向所述边缘用户 发射信息的微站。
13、 根据权利要求 12所述的设备， 其特征在于， 所述确定模块确定的 所述效用函数值为：
Figure imgf000038_0001
其中， ^表示第 i种组合样式的效用函数值， Ρ 表示所述第 i种组合 样式中第 j个微站调度的边缘用户的比例公平 PF参数， N为所述 ABS上对 边缘用户进行调度的微站的个数， Ρ 的计算公式为： ] (R _avg)]
其中， （^-^);表示所述第 i种组合样式中第 j个微站在所述 RBG上调 度的边缘用户的瞬时速率， （?-avg 表示所述第 i种组合样式中第 j个微站 在所述 RBG上调度的边缘用户的平均速率。
14、 根据权利要求 10-13任一项所述的设备， 其特征在于，
所述确定模块还用于： 确定宏站对应的第一权值和每个微站对应的第 二权值， 所述每个微站为每个需要与宏站联合向所述边缘用户发射信息的 微站；
所述指示模块还用于： 将所述宏站对应的第一权值发送给所述宏站， 将所述每个微站对应的第二权值发送给每个微站 , 以使所述宏站和所述每 个微站分别根据所述第一权值和所述每个微站对应的第二权值向所述边缘 用户联合发射信息。
15、 根据权利要求 14所述的设备， 其特征在于， 所述确定模块具体用 于：
当所述需要与宏站联合向所述边缘用户发射信息的微站为一个时， 估 计所述边缘用户和所述宏站之间的第一信道矩阵， 以及所述所述边缘用户 和所述需要与宏站联合向所述边缘用户发射信息的微站之间的第二信道矩 阵； 对所述第一信道矩阵的转置进行奇异值 SVD分解得到所述宏站对应的 第一权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述需要 与宏站联合向所述边缘用户发射信息的微站对应的第二权值； 或者， 当同时需要与宏站联合向所述边缘用户发射信息的微站为至少两个 时， 对应所述每个微站以及调度的每个边缘用户， 估计所述每个微站调度 的所述每个边缘用户和所述宏站之间的信道矩阵， 得到对应每个微站的第 一信道矩阵， 以及估计所述每个微站调度的所述每个边缘用户和所述每个 微站之间的第二信道矩阵； 对所述对应每个微站的第一信道矩阵的转置进 行 SVD分解得到多个第一权值， 对所述多个第一权值进行正交化处理， 得 到所述宏站对应的第一权值， 所述第一权值包括对应每个微站的第一权值， 以及， 对所述第二信道矩阵的转置进行 SVD分解得到所述每个微站对应的 第二权值。
16、 一种基站， 其特征在于， 包括：
获取模块， 用于获取控制设备生成的指示信息， 所述指示信息是所述 控制设备确定需要与宏站联合向微站调度的边缘用户发射信息的微站后生 成的， 所述指示信息用于指示在静默子帧 ABS上由宏站和所述需要与宏站 联合向微站调度的边缘用户发射信息的微站向所述边缘用户发射信息； 处理模块， 用于根据所述指示信息， 在所述 ABS上向所述边缘用户发 射信息。
17、 根据权利要求 16所述的基站， 其特征在于，
所述获取模块还用于： 获取所述控制设备得到的权值， 所述权值是所 述控制设备对所述基站与所述边缘用户之间的信道矩阵的转置进行奇异值 SVD分解后得到的；
所述处理模块具体用于： 根据所述指示信息， 在所述 ABS上， 根据所 述权值向所述边缘用户发射信息。
18、 根据权利要求 17所述的基站， 其特征在于， 当所述基站为宏站， 且同时需要与宏站联合向所述边缘用户发射信息的微站为至少两个时， 所 述获取模块获取的所述权值包括相互正交的分别与每个微站对应的权值。
19、 一种异构***， 其特征在于， 包括：
宏站和 ϋ站；
所述宏站用于根据控制设备生成的指示信息， 在静默子帧 ABS上向所 述微站的边缘用户发射信息； 以及，
所述微站用于根据控制设备生成的指示信息， 在所述 ABS上向所述边 缘用户发射信息；
所述指示信息是所述控制设备确定需要与宏站联合向微站调度的边缘 用户发射信息的微站后生成的， 所述指示信息用于指示在静默子帧 ABS上 由宏站和所述需要与宏站联合向微站调度的边缘用户发射信息的微站向所 述边缘用户发射信息。
20、 根据权利要求 19所述的***， 其特征在于，
所述宏站还用于获取所述控制设备得到的第一权值， 所述第一权值是 所述控制设备对所述边缘用户和所述宏站之间的第一信道矩阵的转置进行 奇异值 SVD分解后得到的， 以便根据所述指示信息， 在所述 ABS上釆用 所述第一权值向所述边缘用户发射信息；
所述微站还用于获取所述控制设备发送的第二权值， 所述第二权值是 所述控制设备对所述边缘用户和所述微站之间的第二信道矩阵的转置进行 SVD分解后得到的， 以便根据所述指示信息， 在所述 ABS上釆用所述第二 权值向所述边缘用户发射信息。
21、 根据权利要求 20所述的***， 其特征在于， 当同时需要与宏站联 合向所述边缘用户发射信息的微站为至少两个时， 所述宏站获取的所述第 一权值包括相互正交的分别与每个同时需要与宏站联合向所述边缘用户发 射信息的微站对应的权值。
PCT/CN2014/074239 2013-05-22 2014-03-28 异构网络中下行发射方法和控制设备、基站和异构*** WO2014187194A1 (zh)

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EP2993938B1 (en) 2018-07-18
EP2993938A4 (en) 2016-04-20
JP2016524391A (ja) 2016-08-12
JP6296575B2 (ja) 2018-03-20
KR101818832B1 (ko) 2018-01-15
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US9949287B2 (en) 2018-04-17
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US20160081112A1 (en) 2016-03-17

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