WO2013134935A1 - Procédé et appareil pour la transmission de données dans un système de communication - Google Patents

Procédé et appareil pour la transmission de données dans un système de communication Download PDF

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Publication number
WO2013134935A1
WO2013134935A1 PCT/CN2012/072305 CN2012072305W WO2013134935A1 WO 2013134935 A1 WO2013134935 A1 WO 2013134935A1 CN 2012072305 W CN2012072305 W CN 2012072305W WO 2013134935 A1 WO2013134935 A1 WO 2013134935A1
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WIPO (PCT)
Prior art keywords
cqi
subframe
type
measuring
bss
Prior art date
Application number
PCT/CN2012/072305
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English (en)
Inventor
Lei Jiang
Ming Lei
Original Assignee
Nec (China) Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nec (China) Co., Ltd. filed Critical Nec (China) Co., Ltd.
Priority to PCT/CN2012/072305 priority Critical patent/WO2013134935A1/fr
Priority to CN201280045004.0A priority patent/CN103828415A/zh
Publication of WO2013134935A1 publication Critical patent/WO2013134935A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss

Definitions

  • Embodiments of the present invention generally relate to communication techniques. More particularly, embodiments of the present invention relate to a method and apparatus for data transmission in a communication system.
  • HetNet heterogeneous network
  • LPNs low power nodes
  • BS small cell base station
  • One of the interfering cases is the interference from a macrocell BS (e.g., Macro eNB) to a user equipment (UE) served by a small cell BS (“SUE” hereafter), especially when Cell Range Extension (CRE) is applied.
  • a macrocell BS e.g., Macro eNB
  • UE user equipment
  • SUE small cell BS
  • CRE Cell Range Extension
  • elCIC Enhanced Inter-Cell Interference Coordination
  • the macrocell BS will stop transmission in almost blank subframes (ABSs), and the SUE experience no interference from Macro eNB during these ABSs. Therefore, the interference levels for the SUE in normal subframes and in ABSs are different.
  • Another one the interfering cases is the interference from a small cell
  • the small cell BS e.g., pico eNB
  • MUE macrocell BS
  • ABSs almost blank subframes
  • a Channel Quality Indicator is the indicator of the channel quality, which is usually measured by the signal to interference plus noise ratio (SINR). Due to the different interference levels in the elCIC scheme, there is a need for the CQI feedback scheme to distinguish the different interference levels.
  • One of the existing solutions is to feed back multiple CQIs from the UE to its serving BS.
  • the UE makes multiple CQI measurements for both the normal subframes and ABSs, and feeds back the multiple CQI measurements to the serving BS.
  • communication traffic is increased in such solution, which may have negative effect on the throughput of the communication system.
  • the present invention proposes a solution which distinguishes the different interference levels without making multiple CQI measurement. Specifically, the present invention provides a method and apparatus for data transmission in a HetNet elCIC communication system.
  • inventions of the invention provide a method for data transmission in a communication system.
  • the communication system may comprises a user equipment (UE), a serving base station (BS) which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the method may comprise steps of: receiving a Channel Quality Indicator (CQI) corresponding to a CQI-measuring subframe from the UE; and obtaining a target CQI corresponding to a CQI-using subframe based on the received CQI, to transmit data to the UE according to the target CQI.
  • CQI Channel Quality Indicator
  • inventions of the invention provide a method for data transmission in a communication system.
  • the communication system may comprises a UE, a serving BS which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the method may comprise steps of: measuring a CQI corresponding to a CQI-measuring subframe; and sending the measured CQI to the serving BS, so that the serving BS obtains a target CQI corresponding to a CQI-using subframe based on the measured CQI to transmit data to the UE according to the target CQI.
  • inventions of the invention provide an apparatus for data transmission in a communication system.
  • the communication system may comprises a UE, a serving BS which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the apparatus may comprise: receiving unit configured to receive a CQI corresponding to a CQI-measuring subframe from the UE; and obtaining unit configured to obtain a target CQI corresponding to a CQI-using subframe based on the received CQI, to transmit data to the UE according to the target CQI.
  • inventions of the invention provide an apparatus for data transmission in a communication system.
  • the communication system may comprises a UE, a serving BS which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the apparatus may comprise: measuring unit configured to measure a CQI corresponding to a CQI-measuring subframe; and sending unit configured to send the measured CQI to the serving base station, so that the serving base station determines a target CQI corresponding to a CQI-using subframe based on the measured CQI to transmit data to the UE according to the target CQI.
  • the BS can adjust the CQI received from the UE according to a subframe bitmap of the ABS pattern of its neighboring BSs, and therefore improve both edge UE throughput and the cell throughput. Meanwhile, the multiple CQI measurements are no longer compulsory.
  • FIG. 1 illustrates a schematic diagram of a communication system applicable to embodiments of the present invention
  • FIG. 2 illustrates a flow chart of a method for data transmission in a communication system according to embodiments of the invention
  • FIG. 3 illustrates a flow chart of a method for data transmission in a communication system according to further embodiments of the invention
  • FIG. 4 illustrates a flow chart of a method for data transmission in a communication system according to further embodiments of the invention
  • FIG. 5 illustrates a flow chart of a method for data transmission in a communication system according to embodiments of the invention
  • FIG. 6 illustrates a flow chart of a method for data transmission in a communication system according to further embodiments of the invention
  • FIG. 7 illustrates a flow chart of a method for data transmission in a communication system according to further embodiments of the invention.
  • FIG. 8 illustrates a block diagram of an apparatus for data transmission in a communication system according to embodiments of the invention
  • FIG. 9 illustrates a block diagram of an apparatus for data transmission in a communication system according to further embodiments of the invention.
  • FIG. 10 illustrates schematic diagram of a subframe bitmap according to embodiments of the invention.
  • each block in the flowcharts or block may represent a module, a program, or a part of code, which contains one or more executable instructions for performing specified logic functions.
  • functions indicated in blocks may occur in an order differing from the order as illustrated in the figures. For example, two blocks illustrated consecutively may be actually performed in parallel substantially or in an inverse order, which depends on related functions.
  • block diagrams and/or each block in the flowcharts and a combination of thereof may be implemented by a dedicated hardware-based system for performing specified functions/operations or by a combination of dedicated hardware and computer instructions.
  • a user equipment may refer to a terminal, a Mobile Terminal (MT), a Subscriber Station (SS), a Portable Subscriber Station (PSS), Mobile Station (MS), or an Access Terminal (AT), and some or all of the functions of the UE, the terminal, the MT, the SS, the PSS, the MS, or the AT may be included.
  • MT Mobile Terminal
  • PSS Portable Subscriber Station
  • MS Mobile Station
  • AT Access Terminal
  • a base station may refer to a node B (NodeB or
  • a base station may be a macrocell BS or a small cell BS.
  • a macrocell BS may be a base station which manages a macrocell, for example, a macro eNB
  • a small cell BS may be a base station which manages a small cell, for example, a pico eNB, a femto eNB, and some other suitable low power nodes.
  • a subframe may have different types, such as blank and normal.
  • a subframe of an interfering BS e.g., a macro eNB
  • this subframe may be a protected subframe at the serving BS, e.g., a pico eNB
  • a subframe of an interfering BS e.g., a pico eNB
  • this subframe may be a protected subframe at the serving BS, e.g., a macro eNB.
  • the subframe may be called as a normal-type subframe (sometimes also called as an unprotected subframe).
  • a CQI-measuring subframe may refers to a subframe in which a CQI is measured by a UE and a CQI-using subframe may refers to a subframe in which a CQI is used by a BS.
  • FIG. 1 illustrates a schematic diagram of a communication system applicable to embodiments of the present invention.
  • the communication environment of FIG. 1 illustrates a LTE system.
  • the system illustratively comprises a macrocell BS (e.g., a macro eNB) 110, a small cell BS (e.g., a pico eNB) 120, a MUE (a user equipment managed by the macrocell BS 110) 130 and a SUE (a user equipment managed by the small cell BS 120) 140.
  • the macrocell BS 110 manages a macrocell
  • the small cell base station may be a low power node which manages a femtocell, a picocell, etc..
  • the SUE 140 is served by the small cell BS 120, and interfered by the macrocell BS 110.
  • the SUE 140 may be also interfered by other neighboring BSs, including macrocell BSs and small cell BSs.
  • the interfering BSs may be one or more.
  • FIG. 1 shows one BS (macrocell BS 110) interferes with the UE (SUE 140), those skilled in the art will appreciate that it is only for illustration rather than limitation.
  • the MUE 130 may be served by the macrocell BS 110 interfered by the small cell BS 120.
  • the MUE 130 may be also interfered by other neighboring BSs, including macrocell BSs and small cell BSs.
  • the present invention is applicable for both the scenario where the SUE 140 is interfered by the macrocell BS 110 and the scenario where the MUE 130 is interfered by the small cell BS 120.
  • the macrocell BS 110 and the small cell BS 120 coexist in a communication system.
  • the SUE 140 is served by the small cell BS 120 and interfered by at least one neighboring BS, such as the macrocell BS 110.
  • the SUE 140 measures the CQ1 in a CQI-measuring subframe and feeds back the CQI to the small cell BS 120.
  • the small cell BS 120 determines a target CQI corresponding to a CQI-using subframe based on the received CQI, so as to transmit data to the SUE 140 by using the target CQI.
  • FIG. 2 illustrates a flow chart of a method 200 for data transmission in a communication system according to embodiments of the invention.
  • the communication system may comprise a UE, a serving BS which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the method as illustrated in FIG. 2 may be performed at a serving BS, which may be either a macrocell BS or a small cell BS.
  • the UE may measure the CQI within a subframe (either a blank-type subframe or a normal-type subframe) arbitrarily or based on the received resource partitioning information sent by eNB.
  • the UE may either feed back to the serving BS this CQI only (if the measurement is constrained to a certain subframe), or the CQI information and the CQI measurement subframe information to the BS.
  • the serving BS may determine whether the received CQI is applicable to the CQI-using subframe, for example, the serving BS may determine whether the received CQI corresponds to the CQI-using subframe based on a subframe bitmap of the at least one interfering BS which is configured with a blank-type subframe. If no CQI adjustment is needed, the serving BS sends data to the UE based on the received CQI; and if CQI adjustment is required, the serving BS may adjust the received CQI in several ways, for example, obtaining a target CQI by estimating interference level based on the received CQI, adjusting the received CQI with a predetermined adjustment value, or any other suitable means.
  • the at least one interfering BS may be configured with at least one blanli-type subframe, that is, a interfering BS may be configured with one or more blank-type subframes.
  • a interfering BS may be configured with one or more blank-type subframes.
  • the at least one interfering BS which is configured with a blank-type subframe may be configured with one or more blank-type subframes in practice.
  • a CQI corresponding to a CQI-measuring subframe is received from the UE.
  • the type of the CQI-measuring subframe may be designated by the serving BS, only the CQI may be received from the UE for obtaining the target CQI at step S201.
  • CQI-measuring subframe may be not designated by the serving BS, and the CQI may be received from the UE together with CQI measurement subframe information which indicates the type of the CQI-measuring subframe, for obtaining the target CQI.
  • a target CQI corresponding to a CQI-using subframe is obtained based on the received CQI, to transmit data to the UE according to the target CQI.
  • target CQI may be obtained by various means.
  • whether the received CQI corresponds to the CQI-using subframe may be determined based on a subframe bitmap of the at least one interfering BS which is configured with a blank-type subframe; and the target CQI may be obtained in response to that the received CQI does not correspond to the CQI-using subframe.
  • the received CQI may be determined directly as the target CQI in response to that the received CQI corresponds to the CQI-using subframe.
  • the type of the CQI-measuring subframe may be designated by the serving BS, and whether the received CQI corresponds to the CQI-using subframe may be determined by obtaining the type of the CQI-using subframe based on the subframe bitmap and judging whether the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe.
  • the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe, it may be determined that the received CQI corresponds to the CQI-using subframe; and if the type of the CQI-measuring subframe is not the same as the type of the CQI-using subframe, it may be determined that the received CQI does not correspond to the CQI-using subframe.
  • the type of the CQI-measuring subframe is not designated by the serving BS, and whether the received CQI corresponds to the CQI-using subframe may be determined by obtaining the type of the CQI-measuring subframe based on CQI measurement subframe information from the UE; obtaining the type of the CQI-using subframe based on the subframe bitmap; and judging whether the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe.
  • the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe, it may be determined that the received CQI corresponds to the CQI-using subframe; and if the type of the CQI-measuring subframe is not the same as the type of the CQI-using subframe, it may be determined that the received CQI does not correspond to the CQI-using subframe.
  • the communication system is a TDD system.
  • the target CQI may be obtained by calculating a signal to interference plus noise ratio (SINR) based on an interference in the CQI-using subframe and receiving power at the UE; and determining the target CQI based on the calculated SINR.
  • SINR signal to interference plus noise ratio
  • the communication system is a FDD system.
  • the target CQI may be obtained by calculating a SINR based on an interference in the CQI-measuring subframe, an interference in the CQI-using subframe and a measured SINR which is obtained from the received CQI; and determining the target CQI based on the calculated SINR.
  • the communication system may be either a FDD system or a TDD system.
  • the target CQI may be obtained by obtaining a CQI adjustment value to adjust the received CQI; and calculating the target CQI based on the received CQI and the CQI adjustment value.
  • the CQI adjustment value may be obtained by several ways, for example, by obtaining a CQI adjustment maximum and a CQI adjustment minimum based on historical CQI information; and selecting a value from a range from the CQI adjustment minimum to the CQI adjustment maximum as the CQI adjustment value.
  • the method as illustrated in FIG. 2 may further comprise a step of sending to the UE resource partitioning information designating the type of the CQI-measuring subframe before receive the CQI from the UE.
  • the type of the CQI-measuring subframe is designated by the serving BS, thereafter, the UE measures a CQI on the designated type of subframe and sends the measured CQI to its serving BS.
  • the serving BS may not judge which type of subframe the CQI corresponds to, because the type has been designated by itself.
  • the method as illustrated in FIG. 2 may further comprise a step of transmitting data based on the target CQI to the UE.
  • FIG. 3 illustrates a flow chart of a method 300 for data transmission in a communication system according to further embodiments of the invention.
  • the communication system may comprise a UE, a serving BS which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the method as illustrated in FIG. 3 may be performed at a serving BS.
  • the type of the CQI-measuring subframe may be designated by the serving BS.
  • the serving BS may send, to the UE, resource partitioning information designating the type of the CQI-measuring subframe.
  • the UE may measure the CQI in the type of subframe designated by the serving BS, and when the serving BS receives the CQI from the UE, it has already known the type of the CQI-measuring subframe.
  • step S301 resource partitioning information designating the type of the CQI-measuring subframe is sent to the UE.
  • the resource partitioning information may comprise an indication which indicates the type of the CQI-measuring subframe designated by the serving BS.
  • the resource partitioning information may be set as "0" to indicate that the CQI-measuring subframe is blank (i.e, an ABS of an interfering BS); and the resource partitioning information may be set as "1 " to indicate that the CQI-measuring subframe is normal.
  • the resource partitioning information may be alternatively set as "1 " to indicate the type of blank and set as "0” to indicate the type of normal.
  • the resource partitioning information may be implemented in several other ways, for example, the resource partitioning information may be alternatively set as "TRUE" to indicate the type of blank and set as "FALSE" to indicate the type of normal.
  • the UE and its serving BS may cooperatively predefine the type of the CQI-measuring subframe.
  • the serving BS has already known the type of the subframe in which the UE measures the CQI.
  • step S302 only the CQI is received from the UE for obtaining a target CQI.
  • only the CQI refers to that is unnecessary for the serving BS to receive any other indication about what type of subframe the CQI corresponds to.
  • step S303 whether the received CQI corresponds to the CQI-using subframe is determined.
  • the type of the CQI-measuring subframe is designated by the serving BS, for example, via the resource partitioning information sent at step S301.
  • the serving BS may obtain the type of the CQI-using subframe based on the subframe bitmap of at least one interfering BS which is configured with a blank-type subframe.
  • the at least one interfering BS is configured with at least one blank-type subframe, e.g., one or more ABSs.
  • the serving BS may obtain the type of the CQI-using subframe based on the subframe bitmap of at least one interfering BS which is configured with the one or more ABSs.
  • a pico eNB gets this information from one of the macrocell eNBs, not from other interfering pico eNBs.
  • the serving BS may judge whether the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe. If yes, the flow goes to step S307, where the serving BS may determine the received CQI corresponds to the CQI-using subframe and there is no necessity for the serving BS to adjust the received CQI.
  • step S304 the serving BS determines the received CQI does not correspond to the CQI-using subframe and obtains a target CQI which corresponds to the CQI-using subframe based on the received CQI.
  • the serving BS may obtain the type of the CQI-measuring subframe based on CQI measurement subframe information from the UE, obtain the type of the CQI-using subframe based on the subframe bitmap, and judge whether the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe. If yes, the serving BS may determine the received CQI corresponds to the CQI-using subframe and there is no necessity for the serving BS to adjust the received CQI.
  • the sewing BS may determine the received CQI does not correspond to the CQI-using subframe and obtain a target CQI which corresponds to the CQI-using subframe based on the received CQI, Details for these embodiments will be discussed in view of FIG. 4 as below.
  • the type of the CQI-using subframe may be obtained based on the subframe bitmap of at least one interfering BS which is configured with a blank-type subframe, thus whether the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe may be judged by the serving BS.
  • a subframe bitmap may be designed at each of the at least one interfering BS, and whether the received CQI corresponds to the CQI-using subframe may be determined based on a subframe bitmap of the at least one interfering BS which is configured with a blank-type subframe.
  • FIG. 10 illustrates schematic diagram of a subframe bitmap according to embodiments of the invention, hi these embodiments, it is assumed that the communication is a TDD system.
  • the subframe bitmap comprises 10 bits, as indicated by 1001-1010, each bit indicating the type of a subframe, e.g., a bit of value "0" may indicate the corresponding subframe is a blank-type subframe (1005, 1010), a bit of value "1” may indicate the corresponding subframe is a normal-type subframe (1001, 1006), and a bit of value "2" or "x” may indicate that it is unsuitable to using the CQI in the corresponding subframe (1002, 1003, 1004, 1007, 1008 and 1009).
  • the subframe bitmap as shown in FIG. 10 illustrates the types of 10 subframes. In FIG.
  • the channel type indicates the channel corresponds to a subframe is downlink (denoted as “D"), uplink (denoted as “U”) or some other type (denoted as “S (special)”).
  • the channel type of a "S" subframe may be considered as "downlink”.
  • the bits 1001 , 1005, 1006, 1010 correspond to a channel type of "D", respectively. Since under the TDD system, the serving BS will using the CQI in downlink, thus a target CQI may be obtained in the subframes corresponding to the channel type "D". That is to say, the serving BS may judge whether the received CQI corresponds to the CQI-using subframe, which is indicated by the bit 1001, 1005, 1006 or 1010.
  • the serving BS designate the CQI-measuring subframe is a normal-type subframe, and it is assumed that the a bit of value "0" indicates the CQI-using subframe is a blank-type frame and a bit of value "1" indicates the CQI-using subframe is a normal-type frame.
  • the serving BS may determine that the CQI-using subframe is normal and thereafter determine that the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe.
  • the serving BS may determine that the received CQI corresponds to the CQI-using subframe at step S303 and the flow may go to S307.
  • the serving BS may determine that the CQI-using subframe is blank and thereafter determine that the type of the CQI-measuring subframe is different with the type of the CQI-using subframe. In this way, the serving BS may determine that the received CQI fails to correspond to the CQI-using subframe at step S303 and the flow may go to S304.
  • the serving BS designate the CQI-measuring subf ame is a blank-type subframe, and it is assumed that the a bit of value "0" indicates the CQI-using subframe is a blank-type frame and a bit of value "1" indicates the CQI-using subframe is a normal-type frame.
  • the serving BS may determine that the CQI-using subframe is normal and thereafter determine that the type of the CQI-measuring subframe is different with the type of the CQI-using subframe.
  • the serving BS may determine that the received CQI fails to correspond to the CQI-using subframe at step S303 and the flow may go to S304.
  • the serving BS may determine that the CQI-using subframe is blank and thereafter determine that the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe. In this way, the serving BS may determine that the received CQI corresponds to the CQI-using subframe at step S303 and the flow may go to S307.
  • the subframe bitmap (not shown) no longer comprises bits of value "2" or "x", which will be replaced with value "0" or "1". Except for this, the details discussed with respect to the TDD system are also applied for the FDD system.
  • a SINR is calculated based on an interference in the CQI-using subframe and receiving power at the UE.
  • the communication system may be either a TDD system or a FDD system.
  • the communication system is a TDD system.
  • the target CQI may be obtained from a SINR calculated based on the received CQI, or may be obtained based on the received CQI in view of a CQI adjustment value.
  • the target CQI may be determined according to a SINR, which is calculated based on an interference in the CQI-using subframe and receiving power at the UE, as shown in steps S304 and S305.
  • the serving BS may be a small cell BS and the at least one interfering BS may include one or more macrocell BSs and/or one or more small cell BSs.
  • the interference in the CQI-using subframe may include interferences from the one or more small cell BSs.
  • the SF R (denoted as "SINRa dj " may be calculated as follows:
  • the P int / mnx may be calculated based on path losses from the UE to the one or more small cell BSs, shadowing factors from the UE to the one or more small cell BSs, transmitting powers of the one or more small cell BSs, and channel information between the UE and the one or more small cell BSs.
  • Ind _ CQIUseIntf is an indication which indicates whether the j th interfering
  • the serving BS may be a small cell BS and if the CQI-measuring subframe is a normal-type subframe, it may be each of the one or more small cell BSs; hence, Ind _ CQIUseIntf . for each small cell interfering BS may be set as "1" and Ind _ CQIUselntf ' . for each macrocell interfering
  • BS may be set as "0");
  • PL - indicates the path loss from the HE to the j th interfering BS;
  • SF j indicates the shadowing factor from the UE to the j th interfering BS
  • Pt ⁇ indicates the power of the j h interfering BS
  • H . indicates the channel information between the UE and the j th interfering BS
  • denotes the Frobenius norm.
  • the interference in the CQI-using subframe may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs.
  • the SINR (denoted as "SrNR a( ]j") may be calculated as follows:
  • the P mi/ max may be calculated based on path losses from the UE to the one or more macrocell BSs, shadowing factors from the UE to the one or more macrocell BSs, transmitting powers of the one or more macrocell BSs, and channel information between the UE and the one or more macrocell BSs.
  • the ⁇ / max ma y be calculated according to equation (2).
  • the P inl f mcn5 may be derived from the received CQI.
  • the serving BS may be a macrocell BS and the at least one interfering BS may include one or more macrocell BSs and/or one or more small cell BSs.
  • the interference in the CQI-using subframe may include interferences from the one or more macrocell BSs.
  • the SINR may be calculated according to equation (1), but it is note that in this case the P- nX f max is the interference from the one or more macrocell BSs which interfere with the UE.
  • the P- ntf max may be calculated in accordance with equation (2).
  • the serving BS may be a macrocell BS
  • the interference in the CQI-using subframe may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs.
  • the SINR (denoted as "SINR ad j") may be calculated in accordance with equation (3).
  • another way to adjust CQI is to increase or decrease the CQI by a certain value.
  • the target CQI may be determined by obtaining a CQI adjustment value (e.g., denoted as " ACQ/ ") to adjust the received
  • CQI adjustment value may be obtained in various ways. For example, a CQI adjustment maximum and a CQI adjustment minimum may be obtained based on historical CQI information; and then the CQI adjustment value may be selected from the range from the CQI adjustment minimum to the CQI adjustment maximum.
  • the historical CQI information may comprise previously obtained CQIs corresponding to blank-type subframes or those corresponding to normal-type subframes. Based on these CQIs, the difference between each pair of temporally neighboring CQIs may be calculated.
  • the maximum difference may be determined as the CQI adjustment maximum (e.g., denoted as " is Ql _ max ")
  • the minimum difference may be determined as the CQI adjustment minimum (e.g., denoted as " ACQI _ in ").
  • the CQI adjustment value ACQI may be randomly selected from the range between ACQI _ min and ACQI _ max , that is,
  • ACQI may be any value in the range from CQI min to ACQI ⁇ m&x .
  • the ACQI may be equal to the middle value between CQI _ min and ACQI _ max .
  • the ACQI may be selected according to the distribution of all values between CQI _ min and ACQI _ max . Those skilled in the art will understand these examples are only for illustration rather limitation, and any other suitable value may be selected from the range from CO/ _ min to ACQI _ max
  • the target CQI (denoted as " CQI a(IJ ") may be obtained as follows:
  • CQI adJ CQI m + ACQI (5)
  • CQI m denotes the CQI measured by the UE and received by the serving BS.
  • the target CQI (also denoted as " CQI adj ") may be obtained as follows:
  • CQI ndj CQI m - ACQI (6)
  • CQI m denotes the CQI measured by the UE and received by the serving BS.
  • the target CQI is determined based on the calculated SINR.
  • a CQI may be determined based on a SINR by several existing means. For example, a skilled person may obtain the target CQI by looking up a CQI-SINR conversion table in view of the calculated SINR.
  • step S306 data is transmitted based on the target CQI to the UE.
  • the received CQI is determined as the target CQI.
  • FIG. 4 illustrates a flow chart of a method 400 for data transmission in a communication system according to further embodiments of the invention.
  • the communication system may comprise a UE, a sewing BS which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the method as illustrated in FIG. 4 may be performed at a serving BS.
  • step S401 the CQI and CQI measurement subframe information which indicates the type of the CQI-measuring subframe are received from the UE, for obtaining a target CQI.
  • the serving BS may not designate the type of the CQI-measuring subframe.
  • the serving BS will not send the resource partitioning information to the UE, and the UE may measure a CQI arbitrarily.
  • the UE may send CQI measurement subframe information together with the measured CQI to the serving BS.
  • the CQI measurement subframe information may comprise an indication which indicates the type of the CQI-measuring subframe designated by the serving BS.
  • the CQI measurement subframe information may be set as "0" to indicate that the CQI-measuring subframe is blank (i.e, an ABS of an interfering BS); and the CQI measurement subframe information may be set as "1 " to indicate that the CQI-measuring subframe is normal.
  • the CQI measurement subframe information may be alternatively set as "1 " to indicate the type of blank and set as "0" to indicate the type of normal.
  • the CQI measurement subframe information may be implemented in several other ways, for example, the CQI measurement subframe information may be alternatively set as "TRUE” to indicate the type of blank and set as "FALSE” to indicate the type of normal.
  • step S402 whether the received CQI corresponds to the CQI-using subframe is determined.
  • whether the received CQI corresponds to the CQI-using subframe may be determined based on a subframe bitmap of the at least one interfering BS which is configured with a blank-type subframe.
  • the UE measures a CQI arbitrarily. Referring to FIG. 10, it is assumed that the a bit of value "0" indicates the CQI-using subframe is a blank-type frame and a bit of value "1" indicates the CQI-using subframe is a normal-type frame.
  • the serving BS may receive the CQI measurement subframe information which comprises a value of "1", and by comparing the two values, it may determine that both of the CQI-using subframe is normal and thereafter determine that the type of the CQI-measuring subframe and the CQI-measuring subframe are normal-type subframes. In this way, the serving BS may determine that the received CQI corresponds to the CQI-using subframe at step S402 and the flow may go to S406. Referring again to FIG. 10, with respect to the bit 1005 whose value is "0", the serving BS may determine that the CQI-using subframe is blank.
  • the serving BS When the serving BS receives the CQI measurement subframe information which comprises a value of "1", it may compare the two values and thereafter determine that the type of the CQI-measuring subframe is different with the type of the CQI-using subframe. In this way, the serving BS may determine that the received CQI fails to correspond to the CQI-using subframe at step S402 and the flow may go to S403.
  • a SINR is calculated based on an interference in the CQI-measuring subframe, an interference in the CQI-using subframe and a measured SINR which is obtained from the received CQI (FDD system).
  • the communication system may be either a TDD system or a FDD system.
  • the communication system is a FDD system.
  • the target CQI may be obtained from a SINR calculated based on the received CQI, or may be obtained based on the received CQI in view of a CQI adjustment value.
  • the target CQI may be determined according to a SINR, which may be calculated based on an interference in the CQI-measuring subframe, an interference in the CQI-using subframe and a measured SINR which may be obtained from the received CQI.
  • SINR (denoted as "SINR a dj") may be calculated as follows:
  • P ivtfl mx is the interference in the CQI-measuring subframe
  • P f2 max is the interference in the CQI-using subframe
  • SINR meas is the measured which may be obtained from the received CQI.
  • the serving BS may be a small cell BS and the at least one interfering BS may include one or more macrocell BSs and/or one or more small cell BSs.
  • the interference in the CQI-measuring subframe ( P mf max ) may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs
  • the interference in the CQI-using subframe ( P in(f2 niax ) may include interferences from the one or more small cell BSs.
  • the serving BS may be a small cell BS
  • the interference in the CQI-measuring subframe ( P i f] may include interferences from the one or more small cell BSs
  • the interference in the CQI-using subframe ( P m xf i max ) ma y include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs.
  • the serving BS may be a macrocell BS and the at least one interfering BS may include one or more macrocell BSs and/or one or more small cell BSs.
  • the interference in the CQI-measuring subframe may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs
  • the interference in the CQI-using subframe may include interferences from the one or more macrocell BSs.
  • the serving BS may be a macrocell BS
  • the interference in the CQI-measuring subframe may include interferences from the one or more macrocell BSs
  • the interference in the CQI-using subframe may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs.
  • the interferences from the one or more macrocell BSs may be calculated based on path losses from the UE to the one or more macrocell BSs, shadowing factors from the UE to the one or more macrocell BSs, transmitting powers of the one or more macrocell BSs, and channel information between the UE and the one or more macrocell BSs
  • the interferences from the one or more small cell BSs may be calculated based on path losses from the UE to the one or more small cell BSs, shadowing factors from the UE to the one or more small cell BSs, transmitting powers of the one or more small cell BSs, and channel information between the UE and the one or more small cell BSs.
  • either the interference in the CQI-measuring subframe ( P ml /] , im ) or the CQI-using subframe ( /? ll/2 _ nm ) may be calculated according to equation (2).
  • another way to adjust CQI is to increase or decrease the CQI by a certain value.
  • the target CQI may be determined by obtaining a CQI adjustment value (e.g., denoted as " ACO/ ") to adjust the received CQI and calculating the target CQI based on the received CQI and the CQI adjustment value. Details of such embodiments have been described in Step S304.
  • the target CQI is determined based on the calculated SINR.
  • step S305 This step is similar as step S305, and all details are also applicable.
  • step S405 data is transmitted based on the target CQI to the UE.
  • the received CQI is determined as the target CQI.
  • FIG. 5 illustrates a flow chart of a method 500 for data transmission in a communication system according to embodiments of the invention.
  • the communication system may comprise a UE, a serving BS which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the method as illustrated in FIG. 5 may be performed at the UE.
  • step S501 a CQI corresponding to a CQI-measuring subframe is measured.
  • CQI-measuring subframe may be designated by the serving BS.
  • the CQI may be measured by receiving from the serving BS resource partitioning infomiation designating the type of the CQI-measuring subframe; and measuring the CQI corresponding to a CQI-measuring subframe which is of the designated type.
  • the type of the CQI-measuring subframe may be not designated by the serving BS.
  • the UE measure a CQI arbitrarily, that is to say, the CQI-measuring subframe may be blank or normal.
  • the measured CQI is sent to the serving BS, so that the serving BS obtains a target CQI corresponding to a CQI-using subframe based on the measured CQI to transmit data to the UE according to the target CQI.
  • CQI-measuring subframe may be designated by the serving BS.
  • the UE may send only the CQI to the serving BS.
  • CQI-measuring subframe may be not designated by the serving BS.
  • the UE may send CQI measurement subfi-ame information which indicates the type of the
  • the method illustrated in FIG. 4 may further comprise a step of receiving data transmitted based on a target CQI from the serving BS.
  • the target CQI may be obtained by the methods of the invention, such as methods exemplarily described in FIGs. 2-4.
  • FIG. 6 illustrates a flow chart of a method 600 for data transmission in a communication system according to further embodiments of the invention.
  • the communication system may comprise a UE, a serving BS which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the method as illustrated in FIG. 6 may be performed at the UE.
  • the type of the CQI-measuring subframe may be designated by the serving BS.
  • the serving BS may send, to the UE, resource partitioning information designating the type of the CQI-measuring subframe.
  • the UE may measure the CQI in the type of subframe designated by the serving BS, and when the serving BS receives the CQI from the UE, it has already known the type of the CQI-measuring subframe.
  • step S601 resource partitioning information designating the type of the CQI-measuring subframe is received from the serving BS.
  • the resource partitioning information may comprise an indication which indicates the type of the CQI-measuring subframe designated by the serving BS.
  • the resource partitioning information may be set as "0" to indicate that the CQI-measuring subframe is blank (i,e, an ABS of an interfering BS); and the resource partitioning information may be set as "1" to indicate that the CQI-measuring subframe is normal.
  • the resource partitioning information may be alternatively set as "1", "TRUE", or some other suitable value to indicate the type of blank and set as "0", "FALSE", or some other suitable value to indicate the type of normal.
  • step S602 the CQI corresponding to a CQI-measuring subframe which is of the designated type is measured.
  • step S603 only the CQI is sent to the serving BS.
  • only the CQI refers to that is unnecessary for the UE to receive any other indication about what type of subframe the CQI corresponds to.
  • step S604 data transmitted based on the target CQI is received from the serving BS.
  • the serving BS may obtain a target CQI corresponding to a CQI-using subframe based on the measured CQI, to transmit data to the UE according to the target CQI.
  • the target CQI may be obtained by the methods of the invention, such as methods exemplarily described in FIGs. 2-4.
  • FIG. 7 illustrates a flow chart of a method 700 for data transmission in a communication system according to further embodiments of the invention.
  • the communication system may comprise a UE, a serving BS which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the method as illustrated in FIG. 7 may be performed at the UE.
  • the serving BS may not designate the type of the CQI-measuring subframe.
  • the serving BS will not send the resource partitioning information to the UE, and the UE may measure a CQI arbitrarily.
  • the UE may send CQI measurement subframe information together with the measured CQI to the serving BS.
  • step S701 a CQI corresponding to a CQI-measuring subframe is measured.
  • the UE may arbitrarily measure a CQI which corresponds to a blank-type subframe or a CQI which corresponds to a normal-type subframe. That is to say, the type of the CQI-measuring subframe may be blank or normal, which depends on the measurement of the UE.
  • the CQI and CQI measurement subframe information which indicates the type of the CQI-measuring subframe are sent to the serving BS.
  • the CQI measurement subframe information may comprise an indication which indicates the type of the CQI-measuring subframe designated by the serving BS.
  • the CQI measurement subframe information may be set as "0" to indicate that the CQI-measuring subframe is blank (i.e, an ABS of an interfering BS); and the CQI measurement subframe information may be set as "1" to indicate that the CQI-measuring subframe is normal. More details of the CQI measurement subframe information discussed in step S401 are all applicable for step S702.
  • step S703 data transmitted based on the target CQI from the serving
  • the serving BS may obtain a target CQI corresponding to a CQI-using subframe based on the measured CQI, to transmit data to the UE according to the target CQI.
  • the target CQI may be obtained by the methods of the invention, such as methods exemplarily described in FIGs. 2-4.
  • FIG. 8 illustrates a block diagram of an apparatus 800 for data transmission in a communication system according to embodiments of the invention.
  • the communication system may comprise a UE, a serving BS which serves for the UE, and at least one interfering BS which interferes with the UE.
  • the apparatus 800 may comprise a receiving unit 810 and an obtaining unit 820.
  • the receiving unit 810 may be configured to receive a Channel Quality Indicator (CQI) corresponding to a CQI-measuring subframe from the UE; and the obtaining unit 820 may be configured to obtain a target CQI corresponding to a CQI-using subframe based on the received CQI, to transmit data to the UE according to the target CQI.
  • CQI Channel Quality Indicator
  • the type of the CQI-measuring subframe may be designated by the serving BS, and the receiving unit 810 may comprise: means configured to receive only the CQI from the UE for obtaining the target CQI.
  • the type of the CQI-measuring subframe may be not designated by the serving BS, and the receiving unit 810 may comprise: means configured to receive, from the UE, the CQI and CQI measurement subframe information which indicates the type of the CQI-measuring subframe, for obtaining the target CQI.
  • the obtaining unit 820 may comprise: determining means configured to determine whether the received CQI corresponds to the CQI-using subframe based on a subframe bitmap of the at least one interfering BS which is configured with a blank-type subframe; and obtaining means configured to obtain the target CQI in response to that the received CQI does not correspond to the CQI-using subframe.
  • the type of the CQI-measuring subframe may be designated by the serving BS, and the determining means may comprise: means configured to obtain the type of the CQI-using subframe based on the subframe bitmap; means configured to judge whether the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe; means configured to determine, if the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe, the received CQI corresponds to the CQI-using subframe; and means configured to determine, if the type of the CQI-measuring subframe is not the same as the type of the CQI-using subframe, the received CQI does not correspond to the CQI-using subframe,
  • the type of the CQI-measuring subframe may be not designated by the serving BS, and the determining means may comprise: means configured to obtain the type of the CQI-measuring subframe based on CQI measurement subframe information from the UE; means configured to obtain the type of the CQI-using subframe based on the subframe bitmap; means configured to judge whether the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe; means configured to determine,if the type of the CQI-measuring subframe is the same as the type of the CQI-using subframe, the received CQI corresponds to the CQI-using subframe; and means configured to determine,if the type of the CQI-measuring subframe is not the same as the type of the CQI-using subframe, the received CQI does not correspond to the CQI-using subframe.
  • the communication system may be a TDD system
  • the obtaining means may comprise: means configured to calculate a signal to interference plus noise ratio (SINR) based on an interference in the CQI-using subframe and receiving power at the UE; and means configured to determine the target CQI based on the calculated SINR.
  • SINR signal to interference plus noise ratio
  • the serving BS may be a small cell BS and the at least one interfering BS may include one or more macrocell BSs and/or one or more small cell BSs.
  • the interference in the CQI-using subframe may include interferences from the one or more small cell BSs; and if the CQI-measuring subframe is a blank-type subframe, the interference in the CQI-using subframe may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs.
  • the serving BS may be a macrocell BS and the at least one interfering BS may include one or more macrocell BSs and/or one or more small cell BSs.
  • the interference in the CQI-using subframe may include interferences from the one or more macrocell BSs; and wherein if the CQI-measuring subframe is a blank-type subframe, the interference in the CQI-using subframe may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs.
  • the communication system may be a FDD system
  • the obtaining means may comprise: means configured to calculate a signal to interference plus noise ratio (SINR) based on an interference in the CQI-measuring subframe, an interference in the CQI-using subframe and a measured SINR which is obtained from the received CQI; and means configured to determine the target CQI based on the calculated SINR.
  • SINR signal to interference plus noise ratio
  • the serving BS may be a small cell BS and the at least one interfering BS may include one or more macrocell BSs and/or one or more small cell BSs.
  • the interference in the CQI-measuring subframe may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs, and the interference in the CQI-using subframe may include interferences from the one or more small cell BSs; and if the CQI-measuring subframe is a blank-type subframe, the interference in the CQI-measuring subframe may include interferences from the one or more small cell BSs, and the interference in the CQI-using subframe may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs.
  • the serving BS may be a macrocell BS and the at least one interfering BS may include one or more macrocell BSs and/or one or more small cell BSs.
  • the interference in the CQI-measuring subframe may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs, and the interference in the CQI-using subframe may include interferences from the one or more macrocell BSs; and if the CQI-measuring subframe is a blank-type subframe, the interference in the CQI-measuring subframe may include interferences from the one or more macrocell BSs, and the interference in the CQI-using subframe may include interferences from the one or more small cell BSs and interferences from the one or more macrocell BSs.
  • the interferences from the one or more macrocell BSs may be calculated based on path losses from the UE to the one or more macrocell BSs, shadowing factors from the UE to the one or more macrocell BSs, transmitting powers of the one or more macrocell BSs, and channel information between the UE and the one or more macrocell BSs.
  • the interferences from the one or more small cell BSs may be calculated based on path losses from the UE to the one or more small cell BSs, shadowing factors from the UE to the one or more small cell BSs, transmitting powers of the one or more small cell BSs, and channel information between the UE and the one or more small cell BSs.
  • the obtaining means may comprise: means configured to obtain a CQI adjustment value to adjust the received CQI; and means configured to calculate the target CQI based on the received CQI and the CQI adjustment value.
  • the means configured to obtain a CQI adjustment value to adjust the received CQI may comprise: means configured to obtain a CQI adjustment maximum and a CQI adjustment minimum based on historical CQI information; and means configured to select a value from a range from the CQI adjustment minimum to the CQI adjustment maximum as the CQI adjustment value.
  • the obtaining unit 820 may further comprise: means configured to determine, in response to that the received CQI corresponds to the CQI-using subframe, the received CQI as the target CQI.
  • the apparatus 800 may further comprise: a sending unit configured to send to the UE resource partitioning information designating the type of the CQI-measuring subframe.
  • the apparatus 800 may further comprise: a transmitting unit configured to transmit data based on the target CQI to the UE.
  • the apparatus 800 may be configured to implement unctionalities as described with reference to FIGs. 2-4. Therefore, the features discussed with respect to any of methods 200, 300 and 400 may apply to the corresponding components of the apparatus 800. It is further noted that the components of the apparatus 800 may be embodied in hardware, software, firmware, and/or any combination thereof. For example, the components of the apparatus 800 may be respectively implemented by a circuit, a processor or any other appropriate selection device. Those skilled in the art will appreciate that the aforesaid examples are only for illustration not limitation.
  • the apparatus 800 comprises at least one processor.
  • the at least one processor suitable for use with embodiments of the present disclosure may include, by way of example, both general and special purpose processors already known or developed in the future.
  • the apparatus 800 further comprises at least one memory.
  • the at least one memory may include, for example, semiconductor memory devices, e.g., RAM, ROM, EPROM, EEPROM, and flash memory devices.
  • the at least one memory may be used to store program of computer executable instructions.
  • the program can be written in any high-level and/or low-level compilable or interpretable programming languages.
  • the computer executable instructions may be configured, with the at least one processor, to cause the apparatus 800 to at least perform according to any of methods 200, 300 and 400 as discussed above.
  • FIG. 9 illustrates a block diagram of an apparatus 900 for data transmission in a communication system according to further embodiments of the invention.
  • the communication system may comprise a UE, a serving BS which serves for the UE ; and at least one interfering BS which interferes with the UE.
  • the apparatus 900 may comprise: a measuring unit 910 configured to measure a Channel Quality Indicator (CQI) corresponding to a CQI-measuring subframe; and a sending unit 920 configured to send the measured CQI to the serving base station, so that the serving base station determines a target CQI corresponding to a CQI-using subframe based on the measured CQI to transmit data to the UE according to the target CQI.
  • CQI Channel Quality Indicator
  • 910 may comprise: means configured to receive from the serving BS resource partitioning information designating the type of the CQI-measuring subframe; and means configured to measure the CQI corresponding to a CQI-measuring subframe which is of the designated type.
  • the CQI-measuring subframe may be designated by the serving BS, and the sending unit 920 may comprise: sending means configured to send only the CQI to the serving BS.
  • the type of the CQI-measuring subframe may be not designated by the serving BS, and the sending unit 920 may comprise: sending means configured to send to the serving BS the CQI and CQI measurement subframe information which indicates the type of the CQI-measuring subframe.
  • the apparatus 900 may further comprises: a receiving unit configured to receive data transmitted based on the target CQI from the serving BS.
  • the apparatus 900 may be configured to implement functionalities as described with reference to FIGs. 5-7. Therefore, the features discussed with respect to any of methods 500, 600 and 700 may apply to the corresponding components of the apparatus 900. It is further noted that the components of the apparatus 900 may be embodied in hardware, software, firmware, and/or any combination thereof. For example, the components of the apparatus 900 may be respectively implemented by a circuit, a processor or any other appropriate selection device. Those skilled in the art will appreciate that the aforesaid examples are only for illustration not limitation.
  • the apparatus 900 comprises at least one processor.
  • the at least one processor suitable for use with embodiments of the present disclosure may include, by way of example, both general and special purpose processors already known or developed in the future.
  • the apparatus 900 further comprises at least one memory.
  • the at least one memory may include, for example, semiconductor memory devices, e.g., RAM, ROM, EPROM, EEPROM, and flash memory devices.
  • the at least one memory may be used to store program of computer executable instructions.
  • the program can be written in any high-level and/or low-level compilable or interpretable programming languages.
  • the computer executable instructions may be configured, with the at least one processor, to cause the apparatus 900 to at least perform according to any of methods 500, 600 and 700 as discussed above.
  • the present disclosure may be embodied in an apparatus, a method, or a computer program product.
  • the various exemplary embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the disclosure is not limited thereto.
  • FIGS. 2-7 may be viewed as method steps, and/or as operations that result from operation of computer program code, and/or as a plurality of coupled logic circuit elements constructed to carry out the associated function(s).
  • At least some aspects of the exemplary embodiments of the disclosures may be practiced in various components such as integrated circuit chips and modules, and that the exemplary embodiments of this disclosure may be realized in an apparatus that is embodied as an integrated circuit, FPGA or ASIC that is configurable to operate in accordance with the exemplary embodiments of the present disclosure.

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Abstract

Dans ses modes de réalisation, la présente invention se rapporte à des procédés et à des appareils adaptés pour transmettre des données dans un système de communication. Le système selon l'invention comprend : un équipement d'utilisateur (UE); une station de base de desserte (BS), qui dessert l'UE; et au moins une station de base brouilleuse qui provoque un brouillage par rapport à l'UE. Un procédé selon l'invention peut comprendre les étapes consistant : à recevoir, de l'UE, un indicateur de qualité de voie (CQI) correspondant à une sous-trame de mesure de CQI; et, sur la base du CQI reçu, à obtenir un CQI cible correspondant à une sous-trame d'utilisation de CQI, dans le but de transmettre des données à l'UE sur la base du CQI cible. Un autre procédé selon l'invention peut comprendre les étapes consistant : à mesurer un indicateur de qualité de voie (CQI) correspondant à une sous-trame de mesure de CQI; et à transmettre le CQI mesuré, à la BS de desserte, de sorte à permettre à la BS de desserte d'obtenir un CQI cible correspondant à une sous-trame d'utilisation de CQI, sur la base du CQI mesuré, dans le but de transmettre des données à l'UE sur la base du CQI cible.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10924206B2 (en) 2016-09-13 2021-02-16 Huawei Technologies Co., Ltd. Adaptive modulation and coding method and base station

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101242566A (zh) * 2007-02-08 2008-08-13 鼎桥通信技术有限公司 多媒体广播多播业务传输方法、系统及基站
CN101986586A (zh) * 2010-11-09 2011-03-16 中兴通讯股份有限公司 一种信道质量测量反馈方法及用户设备
WO2011047496A1 (fr) * 2009-10-19 2011-04-28 Telefonaktiebolaget L M Ericsson (Publ) Procédé et disposition dans un système de communication sans fil
CN102122977A (zh) * 2010-01-11 2011-07-13 电信科学技术研究院 反馈cqi信息及信道质量估计的方法、用户终端及基站
CN102265696A (zh) * 2011-06-03 2011-11-30 华为技术有限公司 传输资源调度方法、装置和系统

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102238611B (zh) * 2010-04-30 2016-04-27 中国移动通信集团公司 控制区域信道质量上报方法、控制信道配置方法及其装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101242566A (zh) * 2007-02-08 2008-08-13 鼎桥通信技术有限公司 多媒体广播多播业务传输方法、系统及基站
WO2011047496A1 (fr) * 2009-10-19 2011-04-28 Telefonaktiebolaget L M Ericsson (Publ) Procédé et disposition dans un système de communication sans fil
CN102122977A (zh) * 2010-01-11 2011-07-13 电信科学技术研究院 反馈cqi信息及信道质量估计的方法、用户终端及基站
CN101986586A (zh) * 2010-11-09 2011-03-16 中兴通讯股份有限公司 一种信道质量测量反馈方法及用户设备
CN102265696A (zh) * 2011-06-03 2011-11-30 华为技术有限公司 传输资源调度方法、装置和系统

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10924206B2 (en) 2016-09-13 2021-02-16 Huawei Technologies Co., Ltd. Adaptive modulation and coding method and base station

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