WO2014019182A1 - Downlink transmission control method, user equipment, and network device - Google Patents

Downlink transmission control method, user equipment, and network device Download PDF

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Publication number
WO2014019182A1
WO2014019182A1 PCT/CN2012/079528 CN2012079528W WO2014019182A1 WO 2014019182 A1 WO2014019182 A1 WO 2014019182A1 CN 2012079528 W CN2012079528 W CN 2012079528W WO 2014019182 A1 WO2014019182 A1 WO 2014019182A1
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WO
WIPO (PCT)
Prior art keywords
information
reference signal
used
demodulation
ue
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PCT/CN2012/079528
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French (fr)
Chinese (zh)
Inventor
周明宇
马瑞泽大卫
任晓涛
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华为技术有限公司
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Priority to PCT/CN2012/079528 priority Critical patent/WO2014019182A1/en
Publication of WO2014019182A1 publication Critical patent/WO2014019182A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0094Indication of how sub-channels of the path are allocated
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035Resource allocation in a cooperative multipoint environment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports

Abstract

Embodiments of the present invention relate to a downlink transmission control method, a user equipment, and a network device. The downlink transmission control method comprises: receiving at least two reference signals sent by a network device for measurement; acquiring at least two groups of channel statistics information according to the at least two reference signals for measurement; receiving control signaling sent by the network device, the control signal carrying information for indicating a reference signal for demodulation; and determining, from the at least two groups of channel statistics information, a group of channel statistics information corresponding to the information that is carried in the control signaling and is used for indicating the reference signal for demodulation. According to the embodiments of the present invention, channel statistics information used when a downlink signal is demodulated is notified to the UE through the information indicating the reference signal for demodulation, thereby saving signaling overhead.

Description

 Downlink transmission control method, user equipment and network equipment

 Embodiments of the present invention relate to the field of wireless communications, and more particularly, to a downlink transmission control method, a user equipment, and a network device. Background technique

 In the current network communication, heterogeneous network technology and CoMP (Coordinated Multiple Point Transmission/Reception) technology are adopted, so that UE (User Equipment, User Equipment) may communicate with different network devices. For example, in a heterogeneous network, network device 1 and network device 2 have different transmission powers, and thus correspond to different coverage areas, and the coverage of network device 1 covers the coverage of network device 2. If UE2 is served by network device 2, when network device 2 sends a signal to UE2, if network device 1 uses the same resource (for example, the same physical resource block) to send a signal to UE1, since UE2 is also in the coverage of network device 1 Within the network, the signal transmitted by the network device 1 causes strong interference to the signal that the UE2 receives the network device 2. When the network device 2 sends a signal to the UE2, if the network device 1 does not send a signal, it will not cause strong interference to the UE2 receiving the signal of the network device 2. Therefore, for UE2, there is a case where there is strong interference of the network device 1 and there is no such strong interference. Since the interference of the two cases is different, the two channel statistics are respectively corresponding.

 Another example is that in the CoMP scenario, network device 1 and network device 2 have different transmission powers, and thus correspond to different coverage areas, and the coverage of network device 1 covers the coverage of network device 2. If at the first moment, the network device 1 transmits a downlink signal to the UE and the network device 2 does not transmit. At the second moment, the network device 2 sends a downlink signal to the UE and the network device 1 does not transmit; or, the network device 1 and the network device 2 simultaneously send a downlink signal to the UE. For these cases, since the downlink signals received by the UE correspond to different transmission sources, they also correspond to different channel statistics.

In these application scenarios, the party that determines the scheduling scheme is a network device, and the network device does not need to notify the UE of the scenario in which the UE is located, so the UE does not know what channel statistics information should be used to demodulate the received downlink signal. Summary of the invention The embodiment of the present invention provides a downlink transmission control method, which uses the reference signal for demodulation to indicate channel statistics used by the UE, which can greatly save signaling overhead.

 In a first aspect, the embodiment of the present invention provides a downlink transmission control method, where the method includes: receiving at least two reference signals for measurement sent by a network device;

 Obtaining at least two sets of channel statistical information according to the at least two reference signals for measurement; receiving control signaling sent by the network device, where the control signaling carries information indicating a reference signal used for demodulation ;

 And determining, from the at least two channel statistics, a set of channel statistical information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.

 With reference to the first aspect, in a first possible implementation, the determining, from the at least two channel statistics, the reference signal that is carried in the control signaling and is used for demodulation Before the channel statistics information corresponding to the information, the method includes:

 Obtaining a correspondence between the information indicating the reference signal used for demodulation and the channel statistical information;

 Determining, from the at least two sets of channel statistics information, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling, specifically: according to the corresponding And determining, from the at least two sets of channel statistics, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.

 With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the acquiring, according to the at least two reference signals for measurement, acquiring at least two sets of channel statistics, including :

 And receiving the first signaling sent by the network device, where the first signaling carries the first indication information, where the first indication information is used to indicate that the user equipment UE acquires at least two according to all or part of the reference signals used for measurement. Group channel statistics.

 With reference to the first aspect or the first and second possible implementation manners of the first aspect, in a third possible implementation, the first indication information is used to indicate that the UE is used to obtain the channel statistics information. The number of reference signals used for measurement used.

With reference to the first aspect or the first to third possible implementation manners of the first aspect, in a fourth possible implementation, the reference signal for measurement is numbered by a signal identifier, the first signaling Carrying the second indication information, where the second indication information includes the signal identifier, and is used to indicate The UE acquires the channel statistical information according to the reference signal used for measurement according to the signal identifier in the second indication information.

 With reference to the first aspect, or the first to fourth possible implementation manners of the first aspect, in a fifth possible implementation, the acquiring, by the information, the information indicating the reference signal for demodulation Correspondences of reference signals used for measurement, including:

 And receiving, by the network device, second signaling, where the second signaling carries information used to indicate the correspondence.

 With reference to the first aspect or the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation, the acquiring information for indicating a reference signal for demodulation and the Correspondences of reference signals used for measurement, including:

 Obtaining, in the UE, the correspondence between the information indicating the reference signal used for demodulation and the channel statistical information.

 With reference to the first aspect or the first to sixth possible implementation manners of the first aspect, in the seventh possible implementation manner, in the Before the indication carried in the command is used for the set of channel statistics corresponding to the information of the demodulated reference signal, the method further includes:

 Receiving, by the network device, the third signaling, where the third signaling includes the enabling indication information, where the enabling indication information is used to indicate that the UE determines, by using the at least two sets of channel statistics information, And the set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.

 In a second aspect, the embodiment of the present invention provides a downlink transmission control method, where the method includes: transmitting, to a user equipment UE, at least two reference signals for measurement, so that the UE is used for measurement according to the at least two The reference signal acquires at least two sets of channel statistics;

 Transmitting control signaling to the UE, wherein the control signaling carries information indicating a reference signal for demodulation, wherein the information indicating a reference signal for demodulation is used to indicate that the UE is from the at least And determining, by the two sets of channel statistics, a set of channel statistical information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.

 With reference to the second aspect, in a first possible implementation manner, before the sending the control signaling to the UE, the method further includes:

Sending the first signaling to the UE, where the first signaling carries the first indication information, where the first indication information is used to indicate that the UE uses the reference signal for measurement according to all or part of the Obtain at least two sets of channel statistics.

 With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation, the first indication information is used to indicate that the UE is used to obtain the channel statistics information. The number of reference signals used for the measurement.

 With reference to the second aspect or the first and second possible implementation manners of the second aspect, in a third possible implementation manner, the method further includes:

 Transmitting the second signaling to the UE, where the second signaling carries the third information, where the third information is used to indicate a correspondence between the information of the reference signal used for demodulation and the channel statistical information.

 With the second aspect or the first to third possible implementation manners of the second aspect, in a fourth possible implementation, before the sending the second signaling to the UE, the method further includes: Transmitting the third signaling to the UE, where the third signaling includes an enabling indication information, where the enabling indication information is used to indicate that the UE receives the second signaling and according to the second signaling The carried third information is used to obtain the channel statistics.

 In a third aspect, the embodiment of the present invention provides a user equipment, where the user equipment includes: a receiving unit, configured to receive at least two reference signals for measurement sent by the network device, and an acquiring unit, configured to Two reference signals for measurement acquire at least two sets of channel statistics;

 The receiving unit is further configured to receive control signaling sent by the network device, where the control signaling carries information for indicating a reference signal used for demodulation;

 And a determining unit, configured to determine, from the at least two channel statistics, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.

 With reference to the third aspect, in a first possible implementation, the acquiring unit is further configured to acquire, by using the information indicating the reference signal used for demodulation, the corresponding relationship between the information and the channel statistics information,

 The determining unit is further configured to determine, according to the correspondence, a group corresponding to the information indicating the reference signal used for demodulation carried in the control signaling, from the at least two sets of channel statistics information. Channel statistics.

In a fourth aspect, the embodiment of the present invention provides a network device, where the network device includes: a sending unit, configured to send, to the user equipment UE, at least a reference signal for measurement, so that the UE is used according to the at least two Acquiring at least two sets of channel statistics information on the measured reference signal; the sending unit is further configured to send control signaling to the UE, where the control signaling carries information indicating a reference signal used for demodulation, where Information indicating a reference signal for demodulation And determining, by the UE, the set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling, from the at least two sets of channel statistics information;

 a processing unit, configured to determine a correspondence between information indicating a reference signal used for demodulation and the channel statistics,

 The sending unit is further configured to send the second signaling to the UE, where the second signaling carries third information, where the third information is used to indicate information and information about the reference signal used for demodulation. The correspondence between channel statistics information.

 According to the embodiment of the present invention, by indicating the information of the reference signal used for demodulation, the UE is notified of the channel statistical information used when demodulating the downlink signal, which saves signaling overhead. DRAWINGS

 In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art without departing from the drawings.

 1 is a schematic flow chart of a downlink transmission control method according to an embodiment of the present invention;

 2 is a schematic flow chart of a method in accordance with an embodiment of the present invention;

 FIG. 3 is a schematic structural diagram of a user equipment according to an embodiment of the present invention; FIG.

 4 is a schematic structural diagram of a network device according to an embodiment of the present invention. detailed description

 The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative labor are within the scope of the present invention.

In the embodiment of the present invention, the network device that sends the downlink signal to the UE may be implemented as a base station (base station), an access point (AP), and a remote radio equipment (remote radio equipment, The cartridge is called RRE, the remote radio head (RRH), the remote radio unit (RRU), and the relay node. The relationship between the network device and the cell is not limited, and may be one network device corresponding to one or more cells, or one cell corresponding to one or more network devices. FIG. 1 is a schematic flow chart of a downlink transmission control method according to an embodiment of the present invention. As shown in FIG. 1, the method 100 includes:

 110: Receive at least two reference signals for measurement sent by the network device;

 120: Acquire at least two sets of channel statistics according to the at least two reference signals used for measurement;

 130: Receive control signaling sent by the network device, where the control signaling carries information for indicating a reference signal used for demodulation;

 140: Determine, from the at least two sets of channel statistics, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling. In the signal demodulation process, the UE needs to obtain channel statistics according to the reference signal for measurement sent by the network device.

 The reference signal for measurement described herein includes, for example, a CSI-RS (Channel Status Information Reference Signal), a CRS (Common Reference Signal), and the like, and the embodiment of the present invention is not used for measurement. The reference signal is limited. In the following description, the CSI-RS will be described as an example.

 The channel statistics information described herein may include delay spread information of the channel, Doppler spread information, timing offset information, frequency offset information, signal to interference and noise ratio information, interference covariance information, and power language information. In the demodulation process of the downlink signal, at least one of these channel statistics information may be used as needed. Those skilled in the art will appreciate that a set of channel statistics may be obtained based on a measurement reference signal, and the set of channel statistics may include at least one of the channel statistics described above.

 The reference signal for demodulation described herein includes, for example, a DMRS (Demodulation Reference Signal), a CRS (Common Reference Signal), and the like, and the present invention does not limit the reference signal used for demodulation. . In the following description, the DMRS is taken as an example for explanation.

 After receiving multiple CSI-RSs, the UE may measure all or part of the CSI-RSs to obtain multiple sets of channel statistics.

Optionally, the UE may measure the CSI-RS according to the indication of the network device to obtain multiple sets of channel statistics. For example, the step 120 may be specifically implemented as follows: the UE receives the first signaling sent by the network device, where the first signaling carries the first indication information, where the first indication information is used to indicate the root of the UE. At least two sets of channel statistics are obtained from all or part of the reference signals used for measurement. For example, the UE receives the three CSI-RSs sent by the network device, and then the UE receives the first signaling sent by the network device, where the first indication information in the first signaling indicates that the UE measures all three CSI-RSs to obtain 3 Group channel statistics; or instruct the UE to measure 2 CSI-RSs to obtain 2 sets of channel statistics.

 Optionally, in an application scenario, the reference signal received by the UE for measurement is numbered by using a signal identifier, for example, the UE receives four CSI-RSs, and uses 00, 01, 10, and 11 as signal identifiers respectively. Represents these four CSI-RSs. In this case, the first signaling may include second indication information, where the second indication information includes the signal identifier, and is used to indicate that the UE corresponds to the signal identifier in the second indication information. The reference signal for measurement is used to obtain the channel statistics. For example, the second indication information may include signal identifiers 00, 11 indicating that the network device instructs the UE to obtain channel statistics by measuring the first and fourth CSI-RSs.

 Thereafter, when it is required to demodulate the downlink signal, in step 130, the UE receives control signaling sent by the network device, where the control signaling carries information indicating a reference signal for demodulation, such as the control signal. Let the information carrying the indication DMRS be carried. According to the embodiment of the present invention, the information indicating the DMRS may be a value of a DMRS bit included in a PDCCH (Physical Downlink Control Channel) sent by the network device to the UE. The value of the bit can be used, for example, to indicate an initial value of the sequence according to the preset for calculating the DMRS or a parameter for determining the initialization value. The UE may calculate the DMRS by using a preset sequence according to the value of the DMRS bit.

 In the embodiment of the present invention, the information for indicating the reference signal used for demodulation is also used for notification.

The channel statistics information that the UE should use when demodulating the downlink signal. For example, the UE may determine, according to another preset formula, information according to the reference signal used for demodulation, for example, according to the value of the DMRS bit in the PDCCH, from the at least two sets of channel statistics. The set of channel statistics information corresponding to the information of the reference signal used for demodulation carried in the control signaling, for example, determining a set of channel statistics information corresponding to the value of the DMRS bit.

Optionally, the correspondence between the information of the reference signal used for demodulation and the channel statistics information may be preset in the network device and the UE, for example, the correspondence between the value of the DMRS bit and the CSI-RS is pre-predetermined. Provided in the network device, the correspondence between the information for indicating the reference signal for demodulation and the reference signal for measurement is known, and the indication carried in the control signaling is used for Channel statistics corresponding to the information of the demodulated reference signal. For example, when the value of the DMRS bit is 0, it means that the first CSI-RS is used to obtain channel statistics, and A value of 1 for the DMRS bit indicates that the channel statistics are acquired using the second CSI-RS.

 Optionally, the network device may notify the UE of the correspondence by using signaling. In this case, before step 140, the UE may receive the second signaling sent by the network device, where the second signaling carries information indicating the correspondence. For example, the information indicating the corresponding relationship may be a value of one indication bit, for example, the indication bit takes a value of 0, and when the DMRS bit value is 0, the channel information is obtained by using the first CSI-RS. When the DMRS bit value is 1, the second CSI-RS is used to obtain channel statistics information; and the indication bit has a value of 1, indicating that the DMRS bit value is 0, and the second CSI-RS is used to acquire the channel. Statistical information, and when the DMRS bit value is 1, the channel information is acquired using the first CSI-RS.

 According to the embodiment of the present invention, since the change of the network structure is not frequent, the correspondence between the information indicating the DMRS and the CSI-RS, or the channel statistical information corresponding to the value of the DMRS bit does not need to be changed frequently, that is, The foregoing first and second signalings do not need to be frequently transmitted, but the DMRS bits in the PDCCH are multiplexed to determine channel statistics used for demodulating the downlink signals, which significantly saves signaling overhead.

 Optionally, the network device may notify the UE by using the method 100 of the embodiment of the present invention, or may not adopt the method. The method 100 may include the following steps: the UE receives the third signaling sent by the network device, where the third signaling includes the enabling indication information, where the enabling indication information is used to indicate that the UE is from the at least two groups of channels In the statistical information, channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling is determined.

For example, in a specific application scenario, for a heterogeneous network as described in the background section, the network device 2 may send two sets of CSI-RSs to the UE, where the first group corresponds to a strong interference of the network device 1 (Transmission) Time Interval, transmission time interval (network device 1 also transmits signals in these ports); Group 2 corresponds to ΤΉ that is not strongly interfered by network device 1 (network device 1 does not transmit signals in these ports). According to the two sets of CSI-RSs, the UE can separately acquire two sets of channel statistical information in a scenario that is subject to strong interference and is not subject to strong interference. In this way, the network device 2 sends a PDCCH to the UE, and when the DMRS information is indicated for the UE, the information indicating the DMRS may be used to indicate that the UE uses the channel statistics information corresponding to the first or second group of CSI-RSs, for example, if the network device 2 is The nth TTI sends a PDCCH to the UE. In the TTI, the network device 1 also sends a signal. Therefore, the network device 2 can indicate, in the DMRS information included in the PDCCH, the channel statistics information that the UE uses the first group of CSI-RSs. That is, the channel statistical information in the case of strong interference; if the network device 2 transmits the PDCCH to the UE in the n+1th to the UE, in the network, the network The device 1 does not send a signal, so the network device 2 can indicate, in the DMRS indication information included in the PDCCH, the channel statistics information corresponding to the second group of CSI-RSs used by the UE, that is, the channel statistical information in the case where there is no strong interference. Therefore, the method of the embodiment of the present invention ensures that the UE uses the appropriate channel statistics to demodulate the PDSCH (Physical Downlink Shared Channel) sent by the network device 2, thereby ensuring demodulation performance.

 For example, for the CoMP scenario exemplified in the background art, the network device may send two sets of CSI-RSs to the UE, where the first group is sent by the network device 1 to the UE, and the second group is sent by the network device 2 to the UE. If the network device 1 transmits the PDSCH to the UE in the nth, the DMRS information may be used in the PDCCH to indicate that the UE uses the channel statistics information corresponding to the first group of CSI-RSs; if the network device 2 sends the information to the UE in the nth The PDSCH can therefore use the DMRS information in the PDCCH to instruct the UE to use the channel statistics information corresponding to the second group of CSI-RSs. Therefore, the method of the embodiment of the present invention ensures that the UE uses the appropriate channel statistics to demodulate the PDSCH transmitted by the network device, thereby ensuring demodulation performance. Alternatively, the network device may send two groups of CSI-RSs to the UE, where the first group is sent by the network device 1 to the UE, and the second group is jointly sent by the network device 1 and the network device 2 to the UE. If the network device 1 transmits the PDSCH to the UE in the nth, the DMRS information may be used in the PDCCH to indicate that the UE uses the channel statistics information corresponding to the first group of CSI-RSs; if the network device 1 and the network device 2 are in the nth TTI The PDSCH is transmitted to the UE, so that the DMRS information can be used in the PDCCH to instruct the UE to use the channel statistics information corresponding to the second group of CSI-RSs. Thus, by this method, the UE is guaranteed to use the appropriate channel state information to demodulate the PDSCH transmitted by the network device, thereby ensuring demodulation performance.

 The above is a specific implementation process of the method of the embodiment of the present invention from the perspective of the UE. The specific implementation process of the method of the embodiment of the present invention is further illustrated from the perspective of the network device.

 2 is a schematic flow diagram of a method in accordance with an embodiment of the present invention. As shown in FIG. 2, method 200 includes:

 210: Send, to the user equipment UE, at least two reference signals for measurement, so that the UE acquires at least two sets of channel statistics according to the at least two reference signals used for measurement;

220: Send control signaling to the UE, where the control signaling carries information indicating a reference signal used for demodulation, where the information indicating a reference signal used for demodulation is used to indicate that the UE is Determining, from the at least two sets of channel statistics, a set of channel statistical information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling. According to the embodiment of the present invention, before the sending the control signaling to the UE, the method 200 further includes:

 Sending the first signaling to the UE, where the first signaling carries the first indication information, where the first indication information is used to indicate that the UE acquires at least two according to all or part of the reference signals used for measurement. Group channel statistics.

 According to the embodiment of the present invention, the first indication information is used to indicate the number of the reference signals used for measurement used by the UE to acquire the channel statistics.

 According to an embodiment of the present invention, the reference signal for measurement is numbered by a signal identifier, the first signaling carries second indication information, and the second indication information includes the signal identifier, and is used to indicate the UE And obtaining, according to the signal in the second indication information, the corresponding reference signal for measurement to obtain the channel statistical information.

 According to an embodiment of the invention, the method 200 further includes:

 Transmitting the second signaling to the UE, where the second signaling carries the third information, where the third information is used to indicate a correspondence between the information of the reference signal used for demodulation and the channel statistical information.

 According to the embodiment of the present invention, before the sending the second signaling to the UE, the method 200 further includes:

 Transmitting the third signaling to the UE, where the third signaling includes an enable indication information, where the enable indication information is used to indicate that the UE receives the second signaling and according to the second The third information carried by the signaling is used to obtain the channel statistics.

 According to an embodiment of the invention, the reference signal for measurement comprises a channel state information reference signal CSI-RS or a common reference signal CRS.

 According to an embodiment of the invention, the reference signal for demodulation comprises a demodulation reference signal DMRS or a common reference signal CRS.

 According to an embodiment of the present invention, the information for indicating a reference signal for demodulation includes generating, according to an embodiment of the present invention, the channel statistics information includes at least one of the following: delay spread information of a channel, Doppler spread. Information, timing deviation information, frequency deviation information, signal to interference and noise ratio information, interference covariance information, and power language information.

 According to the embodiment of the present invention, by indicating the information of the reference signal used for demodulation, the UE is notified of the channel statistical information used when demodulating the downlink signal, which saves signaling overhead.

The user equipment and network for implementing the method embodiment of the present invention are also proposed in the embodiment of the present invention. Equipment.

 FIG. 3 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 3, the user equipment 300 includes:

 The receiving unit 310 is configured to receive at least two reference signals for measurement sent by the network device, where the acquiring unit 320 is configured to acquire, according to the at least two reference signals for measurement, at least two sets of channel statistics information;

 The receiving unit 310 is further configured to receive control signaling sent by the network device, where the control signaling carries information used to indicate a reference signal used for demodulation;

 The determining unit 330 is configured to determine, from the at least two channel statistics, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.

 According to the embodiment of the present invention, the acquiring unit 320 is further configured to acquire a correspondence between the information indicating the reference signal used for demodulation and the channel statistical information,

 The determining unit 330 is further configured to determine, according to the correspondence, a one corresponding to the information indicating the reference signal used for demodulation carried in the control signaling, from the at least two sets of channel statistics information. Group channel statistics.

 According to the embodiment of the present invention, the acquiring unit 320 is further configured to receive the first signaling sent by the network device, where the first signaling carries the first indication information, where the first indication information is used to indicate that the user equipment UE is All or part of the reference signals for measurement acquire at least two sets of channel statistics.

 According to the embodiment of the present invention, the first indication information is used to indicate the number of the reference signals used for measurement used by the UE to acquire the channel statistics.

 According to an embodiment of the present invention, the reference signal for measurement is numbered by a signal identifier, the first signaling carries second indication information, and the second indication information includes the signal identifier, and is used to indicate the UE And obtaining, according to the signal in the second indication information, the corresponding reference signal for measurement to obtain the channel statistical information.

 According to the embodiment of the present invention, the acquiring unit 320 is further configured to receive the second signaling sent by the network device, where the second signaling carries information used to indicate the correspondence.

 According to the embodiment of the present invention, the acquiring unit 320 is further configured to acquire a correspondence between the information indicating the reference signal used for demodulation and the channel statistical information preset in the UE.

The determining unit 330 is further configured to receive the third sent by the network device, according to an embodiment of the present invention. Signaling, where the third signaling includes an enable indication information, where the enable indication information is used to indicate that the UE determines, from the at least two sets of channel statistics information, that is carried in the control signaling The set of channel statistics information corresponding to the information of the reference signal used for demodulation.

 4 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown in Figure 4, network device 400 includes:

 The sending unit 410 is configured to send, to the user equipment UE, at least a reference signal for measurement, so that the UE acquires at least two sets of channel statistics according to the at least two reference signals for measurement;

 The sending unit 410 is further configured to send control signaling to the UE, where the control signaling carries information indicating a reference signal used for demodulation, where the information indicating a reference signal used for demodulation is used for Instructing the UE to determine, from the at least two sets of channel statistics, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling; the processing unit 420, Determining a correspondence between information indicating a reference signal for demodulation and the channel statistical information,

 The sending unit 410 is further configured to send the second signaling to the UE, where the second signaling carries third information, where the third information is used to indicate information about the reference signal used for demodulation Correspondence relationship of the channel statistics information. The corresponding relationship in .

 According to an embodiment of the present invention, the sending unit 410 is further configured to send the first signaling to the UE, where the first signaling carries first indication information, where the first indication information is used to indicate that the UE is All or part of the reference signals for measurement acquire at least two sets of channel statistics.

 According to an embodiment of the present invention, the sending unit 410 is further configured to send the third signaling to the UE, where the third signaling includes an enable indication information, where the enable indication information is used to indicate the UE Receiving the second signaling and acquiring the channel statistics according to the third information carried by the second signaling.

FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown, user device 500 generally includes at least one processor 510, such as a CPU, at least one port 520, memory 530, and at least one communication bus 540. Communication bus 540 is used to implement connection communication between these devices. The processor 510 is configured to execute an executable module, such as a computer program, stored in the memory 530; the user device optionally includes a user interface 550, including but not limited to a display, a key Disk and pointing devices, such as a mouse, trackball, touchpad, or tactile display. The memory 530 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory. The communication connection of the user equipment to the at least one network device is implemented by at least one port 520.

 In some embodiments, memory 530 stores the following elements, executable modules or data structures, or a subset thereof, or their extension set:

 Operating system 532, which contains various system programs for implementing various basic services and processing hardware-based tasks;

 Application module 534, which contains various applications for implementing various application services.

 The application module 534 includes, but is not limited to, a receiving unit (310), an obtaining unit (320), and a determining unit (330).

 For the specific implementation of each unit in the application module 532, refer to the corresponding unit in the embodiment shown in FIG. 3, and details are not described herein.

 FIG. 6 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown, network device 600 generally includes at least one processor 610, such as a CPU, at least one port 620, memory 630, and at least one communication bus 640. Communication bus 640 is used to implement the computer program of these devices; the user device optionally includes a user interface 650, including but not limited to a display, a keyboard and a pointing device, such as a mouse, trackball, touchpad or tactile display. Memory 630 may include high speed RAM memory and may also include non-volatile memory

(non-volatile memory), such as at least one disk saver. The communication connection of the network device to the at least one user device is implemented by at least one port 620.

 In some embodiments, memory 630 stores the following elements, executable modules or data structures, or a subset thereof, or their extension set:

 Operating system 632, which contains various system programs for implementing various basic services and processing hardware-based tasks;

 Application Module 634 includes a variety of applications for implementing various application services.

 The application module 634 includes, but is not limited to, a transmitting unit (410) and a processing unit (420). For the specific implementation of each unit in the application module 632, refer to the corresponding unit in the embodiment shown in FIG. 4, and details are not described herein.

One of ordinary skill in the art will recognize that each of the embodiments described herein in connection with the embodiments disclosed herein The exemplary unit and algorithm steps can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

 It will be apparent to those skilled in the art that, for the convenience of the description and the cleaning process, the specific operation of the system, the device and the unit described above may be referred to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

 In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, 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 units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

 In addition, each functional unit in each embodiment of the present invention 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 functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile 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. .

The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited. In this regard, any person skilled in the art can easily conceive changes or substitutions within the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request
 A downlink transmission control method, the method comprising:
 Receiving at least two reference signals for measurement sent by the network device;
 Obtaining at least two sets of channel statistical information according to the at least two reference signals for measurement; receiving control signaling sent by the network device, where the control signaling carries information indicating a reference signal used for demodulation ;
 And determining, from the at least two channel statistics, a set of channel statistical information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.
 2. The method according to claim 1, wherein, in the from the at least two channel statistics, determining, with the reference signal carried in the control signaling, a reference signal for demodulation Before the channel statistics information corresponding to the information, the method includes:
 Obtaining a correspondence between the information indicating the reference signal used for demodulation and the channel statistical information;
 Determining, from the at least two sets of channel statistics information, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling, specifically: according to the corresponding And determining, from the at least two sets of channel statistics, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.
 3. The method of claim 1 or 2, wherein
 And obtaining, according to the at least two reference signals for measurement, at least two sets of channel statistics, including:
 And receiving the first signaling sent by the network device, where the first signaling carries the first indication information, where the first indication information is used to indicate that the user equipment UE acquires at least two according to all or part of the reference signals used for measurement. Group channel statistics.
 4. The method of claim 3, wherein
 The first indication information is used to indicate the number of the reference signals used by the UE for acquiring the channel statistics.
 5. The method of claim 3, wherein
The reference signal for the measurement is numbered by the signal identifier, the first signaling carries the second indication information, and the second indication information includes the signal identifier, and is used to indicate that the UE is according to the second indication. The signal in the information identifies the corresponding reference signal for measurement to obtain The channel statistics information.
 6. The method of claim 2, wherein
 And obtaining the correspondence between the information used to indicate the reference signal for demodulation and the reference signal used for measurement, including:
 And receiving, by the network device, second signaling, where the second signaling carries information used to indicate the correspondence.
 7. The method of claim 2, wherein
 And the acquiring the correspondence between the information indicating the reference signal used for demodulation and the channel statistics information, including:
 Obtaining, in the UE, the correspondence between the information indicating the reference signal used for demodulation and the channel statistical information.
 The method according to any one of claims 1 to 5, characterized in that
 Before the determining, from the at least two sets of channel statistics information, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling, the method further includes: :
 Receiving, by the network device, the third signaling, where the third signaling includes the enabling indication information, where the enabling indication information is used to indicate that the UE determines, by using the at least two sets of channel statistics information, And the set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.
 9. A method according to any one of claims 1 to 8, characterized in that
 The reference signal for measurement includes a channel state information reference signal CSI-RS or a common reference signal CRS.
 10. A method according to any one of claims 1 to 9, characterized in that
 The reference signal for demodulation includes a demodulation reference signal DMRS or a common reference signal CRS.
 11. The method of claim 10, wherein
 The information for indicating a reference signal for demodulation includes an initialization value for generating a sequence used by the DMRS or a parameter for determining the initialization value.
The method according to any one of claims 1 to 11, wherein the channel statistical information comprises at least one of the following: delay spread information of a channel, Doppler spread information, timing offset information, frequency deviation Information, signal to interference and noise ratio information, interference covariance information, and power language information.
A downlink transmission control method, the method comprising: transmitting, to a user equipment UE, at least two reference signals for measurement, so that the UE acquires according to the at least two reference signals for measurement At least two sets of channel statistics;
 Transmitting control signaling to the UE, wherein the control signaling carries information indicating a reference signal for demodulation, wherein the information indicating a reference signal for demodulation is used to indicate that the UE is from the at least And determining, by the two sets of channel statistics, a set of channel statistical information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.
 14. The method of claim 13 wherein:
 Before the sending the control signaling to the UE, the method further includes:
 Sending the first signaling to the UE, where the first signaling carries the first indication information, where the first indication information is used to indicate that the UE acquires at least two according to all or part of the reference signals used for measurement. Group channel statistics.
 15. The method of claim 14 wherein:
 The first indication information is used to indicate the number of the reference signals used by the UE for acquiring the channel statistics.
 16. The method of claim 14 wherein:
 The reference signal for the measurement is numbered by the signal identifier, the first signaling carries the second indication information, and the second indication information includes the signal identifier, and is used to indicate that the UE is according to the second indication. The signal in the information identifies the corresponding reference signal for measurement to obtain the channel statistical information.
 The method according to claim 13 or 14, wherein the method further comprises: sending a second signaling to the UE, where the second signaling carries third information, the third information Corresponding relationship between the information of the reference signal used for demodulation and the channel statistical information.
 18. The method of claim 17 wherein:
 Before the sending the second signaling to the UE, the method further includes:
 Transmitting the third signaling to the UE, where the third signaling includes an enabling indication information, where the enabling indication information is used to indicate that the UE receives the second signaling and according to the second signaling The carried third information is used to obtain the channel statistics.
 19. The method of any of claims 13 to 18, wherein
The reference signal for measurement includes a channel state information reference signal CSI-RS or a common reference signal CRS.
20. A method according to any one of claims 13 to 19, characterized in that
 The reference signal for demodulation includes a demodulation reference signal DMRS or a common reference signal CRS.
 21. The method of claim 20, wherein
 The information indicating the reference signal for demodulation includes an initialization value of a sequence used to generate the DMRS or a parameter determining the initialization value.
 The method according to any one of claims 13 to 21, wherein the channel statistical information comprises at least one of the following: delay spread information of a channel, Doppler spread information, timing offset information, frequency deviation Information, signal to interference and noise ratio information, interference covariance information, and power language information.
 A user equipment, the user equipment comprising:
 a receiving unit, configured to receive at least two reference signals for measurement sent by the network device, and an acquiring unit, configured to acquire, according to the at least two reference signals for measurement, at least two sets of channel statistical information;
 The receiving unit is further configured to receive control signaling sent by the network device, where the control signaling carries information for indicating a reference signal used for demodulation;
 And a determining unit, configured to determine, from the at least two sets of channel statistics, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling.
 24. The user equipment of claim 20, wherein
 The acquiring unit is further configured to acquire a correspondence between the information indicating the reference signal used for demodulation and the channel statistical information,
 The determining unit is further configured to determine, according to the correspondence, a group corresponding to the information indicating the reference signal used for demodulation carried in the control signaling, from the at least two sets of channel statistics information. Channel statistics.
 25. A network device, the network device comprising:
a sending unit, configured to send, to the user equipment UE, at least a reference signal for measurement, so that the UE acquires at least two sets of channel statistics according to the at least two reference signals for measurement; the sending unit is further configured to Transmitting, by the UE, control signaling, where the control signaling carries information indicating a reference signal used for demodulation, wherein the information indicating a reference signal used for demodulation is used to indicate that the UE is from the at least two And determining, by the group channel information, a set of channel statistics information corresponding to the information indicating the reference signal used for demodulation carried in the control signaling; and a processing unit, configured to determine a reference signal that is used for demodulation Information and the channel statistics Correspondence relationship
 The sending unit is further configured to send the second signaling to the UE, where the second signaling carries third information, where the third information is used to indicate information and information about the reference signal used for demodulation. The correspondence between channel statistics information.
PCT/CN2012/079528 2012-08-01 2012-08-01 Downlink transmission control method, user equipment, and network device WO2014019182A1 (en)

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