WO2013123848A1 - 传输数据的方法、用户设备和基站 - Google Patents
传输数据的方法、用户设备和基站 Download PDFInfo
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- WO2013123848A1 WO2013123848A1 PCT/CN2013/071212 CN2013071212W WO2013123848A1 WO 2013123848 A1 WO2013123848 A1 WO 2013123848A1 CN 2013071212 W CN2013071212 W CN 2013071212W WO 2013123848 A1 WO2013123848 A1 WO 2013123848A1
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- configuration
- csi
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000005540 biological transmission Effects 0.000 title abstract description 7
- 238000013507 mapping Methods 0.000 claims abstract description 21
- 230000011664 signaling Effects 0.000 claims description 153
- 238000005259 measurement Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 17
- 230000006870 function Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
- H04L5/0094—Indication of how sub-channels of the path are allocated
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
Definitions
- the present invention relates to the field of communications and, more particularly, to a method of transmitting data, a user equipment, and a base station. Background technique
- the base station in order to enable the UE (User Equipment) to measure the downlink channel and obtain the downlink CSI (Channel State Information), the base station needs to send an RS (Reference Signal) to the coverage area.
- RS Reference Signal
- the base station needs to transmit a non-zero power CSI-RS (Channel State Information Reference). Signal, channel status information reference signal) to the UE in the coverage area for the UE to perform downlink channel measurement.
- the base station can also transmit zero-power CSI-RS to avoid interference with non-zero-power CSI-RSs of neighboring cells.
- a base station transmits a non-zero power CSI-RS and a zero-power CSI-RS to a UE on a RE (Resource Element).
- RE Resource Element
- the embodiments of the present invention provide a method for transmitting data, a user equipment, and a base station, which can improve the utilization efficiency of the RE.
- a method for transmitting data including: acquiring a resource element RE configuration, where the RE indicated by the RE configuration is a subset of REs that can be used to transmit a channel state information reference signal CSI-RS and can map data a symbol; according to the RE configuration, the receiving base station is instructed by the RE configuration The data symbol sent on the RE.
- the acquiring the RE configuration includes: obtaining, according to the dynamic signaling sent by the base station, an index corresponding to the second RE configuration in the currently transmitted subframe;
- RE is an RE for transmitting a CSI-RS, but the RE indicated by the second RE configuration cannot map data symbols;
- the RE according to the second RE configuration acquisition indication in the currently transmitted subframe is the RE configuration capable of mapping the data symbol.
- the receiving, by the receiving base station, the data symbol sent by the RE indicated by the RE configuration Includes:
- the method further includes:
- the base station Receiving, by the base station, the CSI-RS sent by the at least one second AP on the RE indicated by the RE configuration, where the at least one first AP and the at least one second AP are coordinated multi-point transceiver systems Multiple APs participating in collaboration;
- the acquiring the RE configuration includes:
- the acquiring the RE configuration includes:
- the acquiring the RE configuration includes:
- the dynamic signaling that carries the first index corresponding to the RE configuration; according to the first index, from the RE configuration set including the at least one first RE configuration and the at least one second RE configuration Obtaining the RE configuration, wherein the at least one second RE configuration and corresponding index are predefined.
- the acquiring the RE configuration includes:
- the method further includes:
- the data symbols are demodulated and channel decoded as useful data symbols or useless data symbols.
- the data symbol is demodulated and channel decoded as a useful data symbol or a useless data symbol, including: Demodulating and channel decoding the data symbol as a useful data symbol or a useless data symbol according to the dynamic signaling sent by the base station, where the dynamic signaling is used to indicate that the data symbol is a useful data symbol. Or useless data symbols.
- the high layer signaling includes a bitmap encoding, where a bit and a bit in the bitmap encoding Corresponding to the pilot pattern of the CSI-RS, the number of antenna ports corresponding to the pilot pattern of the CSI-RS is 1, 2, 4 or 8.
- the CSI-RS is a zero power CSI-RS or a non-zero power CSI-RS.
- the RE configuration includes a period and a subframe offset.
- a method for transmitting data including: notifying a user equipment UE of a resource element RE configuration, the RE indicated by the RE configuration being a subset of REs that can be used to transmit a channel state information reference signal CSI-RS And capable of mapping data symbols; according to the RE configuration, transmitting the data symbols to the UE on the RE indicated by the RE configuration.
- the notifying the UE of the RE configuration includes: sending dynamic signaling to the UE to notify the UE of the RE configuration, where the dynamic signaling is used by And causing the UE to learn the corresponding index of the second RE configuration in the currently transmitted subframe, and know that the RE indicated by the second RE configuration corresponding to the index in the currently transmitted subframe is used to send the CSI.
- An RE of the RS but the RE indicated by the second RE configuration cannot map data symbols, and causes the UE to obtain the RE according to the second RE configuration in the currently transmitted subframe.
- the RE configuration of the data symbols can be mapped.
- the sending, by the RE configuration, the data symbol to the UE including:
- the method further includes:
- the notifying the UE of the RE configuration includes:
- the higher layer signaling carrying the RE configuration is sent to the UE.
- the notifying the UE of the RE configuration includes:
- the notifying the UE of the RE configuration includes:
- the notifying the UE of the RE configuration includes:
- the sending, by the RE configuration, the data symbol to the UE including: Mapping the data symbol on the RE indicated by each RE configuration in the RE configuration set; deleting the RE configuration indicated by each RE configuration according to the transmission requirement of the CSI-RS The data symbols mapped on the remaining REs other than the indicated RE.
- the high layer signaling includes a bitmap encoding, where a bit and a bit in the bitmap encoding Corresponding to the pilot pattern of the CSI-RS, the number of antenna ports corresponding to the pilot pattern of the CSI-RS is 1, 2, 4 or 8.
- the CSI-RS is a zero power CSI-RS or a non-zero power CSI-RS.
- the RE configuration includes a period and a subframe offset.
- a user equipment including: an acquiring unit, configured to acquire a resource element RE configuration, where the RE indicated by the RE configuration is a subset of REs that can be used to send a channel state information reference signal CSI-RS and The data symbol can be mapped; the receiving unit is configured to receive, according to the RE configuration, the data symbol sent by the base station on the RE indicated by the RE configuration.
- the acquiring unit is specifically configured to obtain the RE configuration as follows:
- RE is an RE for transmitting a CSI-RS, but the RE indicated by the second RE configuration cannot map data symbols;
- the RE according to the second RE configuration acquisition indication in the currently transmitted subframe is the RE configuration capable of mapping the data symbol.
- the user equipment further includes a measurement unit, The receiving unit is specifically configured to receive, by the base station, the data symbol sent by the at least one first access point AP on the RE indicated by the RE configuration;
- the receiving unit is further configured to receive, by the base station, the CSI-RS sent by the at least one second AP on the RE indicated by the RE configuration, where the at least one first AP and the at least one second
- the AP is a plurality of APs participating in cooperation in the coordinated multi-point transceiver system
- the measuring unit is specifically configured to measure interference of the at least one first AP to the at least one second AP according to the CSI-RS.
- the acquiring unit is specifically configured to receive, by the base station, a high-layer letter that carries the RE configuration And obtaining the RE configuration according to the high layer signaling; or
- the acquiring unit is specifically configured to receive, by the base station, multiple RE configurations and corresponding High-level signaling of the index; receiving the dynamic signaling that is sent by the base station and carrying the first index corresponding to the RE configuration; and acquiring, according to the first index, the RE configuration set that includes the multiple RE configurations RE configuration.
- the acquiring unit is specifically configured to receive, by the base station, the at least one first RE configuration and High-level signaling of the corresponding index; receiving dynamic signaling sent by the base station to carry a first index corresponding to the RE configuration; according to the first index, including the at least one first RE configuration and at least one The RE configuration is obtained in a RE configuration set of the two REs, where the at least one second RE configuration and the corresponding index are predefined.
- the acquiring unit is specifically configured to receive, by the base station, a corresponding part that carries the RE configuration Dynamic signaling of an index; obtaining, according to the first index, the RE configuration from a set of RE configurations including at least one RE configuration, wherein the at least one RE configuration and a corresponding index are predefined.
- the user equipment further includes a processing unit, configured to use the data symbol as a useful data symbol Or useless data symbols for demodulation and channel decoding.
- the processing unit is specifically configured to: according to dynamic signaling sent by the base station, The symbol acts as a useful data symbol or a useless data symbol for demodulation and channel decoding, the dynamic signaling being used to indicate that the data symbol is a useful data symbol or a useless data symbol.
- the high layer signaling includes a bitmap encoding, where a bit and a bit in the bitmap encoding Corresponding to the pilot pattern of the CSI-RS, the number of antenna ports corresponding to the pilot pattern of the CSI-RS is 1, 2, 4 or 8.
- the CSI-RS is a zero-power CSI-RS or a non-zero-power CSI-RS.
- the RE configuration includes a period and a subframe offset.
- a base station including: a notification unit, configured to notify a user equipment UE of a resource element RE configuration, where the RE indicated by the RE configuration is an RE that can be used to send a channel state information reference signal CSI-RS a subset and capable of mapping data symbols; a sending unit, configured to send the data symbol to the UE on the RE indicated by the RE configuration according to the RE configuration.
- a notification unit configured to notify a user equipment UE of a resource element RE configuration, where the RE indicated by the RE configuration is an RE that can be used to send a channel state information reference signal CSI-RS a subset and capable of mapping data symbols
- CSI-RS channel state information reference signal
- the notification unit is specifically configured to notify the UE of the RE configuration as follows:
- the sending unit is specifically configured to pass at least one of the REs indicated by the RE configuration An access point AP sends the data symbol to the UE;
- the sending unit is further configured to send the CSI-RS to the UE by using at least one second AP on the RE indicated by the RE configuration, where the at least one first AP and the at least one second AP It is a plurality of APs participating in collaboration in a coordinated multi-point transceiver system.
- the notification unit is configured to send, to the UE, a high layer signaling that carries the RE configuration. .
- the notification unit is specifically configured to send, by the UE, multiple RE configurations and corresponding indexes.
- High-level signaling sending, to the UE, dynamic signaling that carries a first index corresponding to the RE configuration, where the RE configuration belongs to an RE configuration set including the multiple RE configurations.
- the notification unit is configured to send, by the UE, at least one first RE configuration and corresponding High-level signaling of the index; transmitting, to the UE, dynamic signaling carrying a first index corresponding to the RE configuration, the RE configuration belonging to an RE including the at least one first RE configuration and at least one second RE configuration A configuration set, wherein the at least one second RE configuration and corresponding index are predefined.
- the notification unit is specifically configured to send, to the UE, a first one that carries the RE configuration Dynamic signaling of the index, the RE configuration belongs to an RE configuration set including at least one RE configuration, wherein the at least one RE configuration and the corresponding index are predefined.
- the sending unit is specifically configured to be used by each RE configuration in the RE configuration set Mapping the data symbols on the RE; deleting the remaining REs in the RE indicated by each RE configuration except the RE indicated by the RE configuration according to the transmission requirement of the CSI-RS The data symbol shot.
- the high layer signaling includes a bitmap encoding, where the bit and the bitmap in the bitmap encoding Description
- the number of antenna ports corresponding to the pilot pattern of the CSI-RS is 1, 2, 4 or 8.
- the CSI-RS is a zero-power CSI-RS or a non-zero-power CSI-RS.
- the RE configuration includes a period and a subframe offset.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- FIG. 1 is a schematic diagram of an example of a scenario in which an embodiment of the present invention is applicable.
- FIG. 2 is a schematic flow chart of a method of transmitting data according to an embodiment of the present invention.
- FIG. 3 is a schematic flowchart of a method of transmitting data according to another embodiment of the present invention.
- FIG. 4 is a schematic flow chart of a process of a method of transmitting data according to another embodiment of the present invention.
- 5a and 5b are schematic diagrams of examples of CSI-RS pilot patterns according to another embodiment of the present invention.
- 6a and 6b are schematic diagrams showing an example of a CSI-RS pilot pattern according to another embodiment of the present invention.
- FIG. 7a and 7b are schematic illustrations of examples of CSI-RS pilot patterns in accordance with another embodiment of the present invention. Figure.
- Figure 8 is a block diagram of a user equipment in accordance with one embodiment of the present invention.
- FIG. 9 is a block diagram of a base station in accordance with one embodiment of the present invention. detailed description
- GSM Global System of Mobile communication
- CDMA Code Division Multiple Access
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access Wireless
- GPRS General Packet Radio Service
- LTE Long Term Evolution
- UE User Equipment
- MT Mobile Terminal
- RAN Radio Access Network
- the user device can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a mobile device that can be portable, pocket, handheld, computer built, or in-vehicle. They exchange language and/or data with the wireless access network.
- a mobile terminal such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a mobile device that can be portable, pocket, handheld, computer built, or in-vehicle. They exchange language and/or data with the wireless access network.
- the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (eNB or e-NodeB, evolved Node B) in LTE.
- BTS Base Transceiver Station
- NodeB base station
- eNB evolved base station
- e-NodeB evolved Node B
- FIG. 1 is a schematic diagram of an example of a scenario in which an embodiment of the present invention is applicable.
- the application scenario of Figure 1 may be a distributed antenna system using Coordinated Multiple Point Transmission and Reception (CoMP) technology (Serial Antenna) System, DAS).
- CoMP Coordinated Multiple Point Transmission and Reception
- DAS Serial Antenna
- APs access points
- UEs can provide data services for one or more UEs simultaneously.
- the application scenario includes one macro base station 101 and six dispersed APs, namely, API, AP2, AP3, AP4, AP5, and AP6.
- the API to AP6 has one or more antennas and share the same Cell Identification (Cell ID).
- Cell ID Cell ID
- the API to AP6 can cooperate to provide data services for one or more UEs.
- API and AP2 can provide data services for both UE1 and UE2.
- FIG. 1 only describes that the API and the AP2 can provide data services for the UE1 and the UE2 at the same time, for the convenience of description, the scope of the embodiments of the present invention is not limited.
- the AP that provides data services for UE1 and UE2 at the same time may be at least two of API to AP6.
- the AP and the UE are not limited to such a number, and the number of APs may be one or more.
- the number of UEs may be one or more.
- the AP may be a cell corresponding to the cell or the cell, and may be a remote radio head (RRH) or a radio remote unit (RRU), or may be The Antenna Unit (AU) is not limited in this embodiment of the present invention.
- RRH remote radio head
- RRU radio remote unit
- AU The Antenna Unit
- the description manner of the AP is used in the embodiment of the present invention, but the scope of the embodiment of the present invention is not limited.
- FIG. 2 is a schematic flow chart of a method of transmitting data according to an embodiment of the present invention.
- the method of Figure 2 is performed by a UE, such as UE1 or UE2 in Figure 1.
- the RE indicated by the RE configuration is a subset of REs that can be used to send CSI-RSs and can map data symbols.
- the RE configuration that can be obtained by the UE may be one or more, which is not limited in the embodiment of the present invention.
- the RE indicated by the RE configuration is a subset of REs that can be used to transmit CSI-RS, and the subset described herein may be a generalized subset, that is, the RE indicated by the RE configuration may be an RE that can be used to transmit CSI-RS. A part of the REs may also be an RE that can be used to transmit the CSI-RS, which is not limited by the embodiment of the present invention. 220.
- multiple APs can provide data services for one or more UEs at the same time.
- API and AP2 in Figure 1 can provide data services for UE1 or UE2 at the same time.
- the UE receiving the CoMP service may perform measurement of the downlink channel with the AP according to the CSI-RS.
- the UE also needs to perform interference measurement according to the CSI-RS.
- the UE cannot measure the interference between the APs according to the CSI-RS, which causes the interference measurement to be inaccurate, affects the channel quality indicator (CQI) accuracy, and thus affects the user's service quality and the system. Throughput.
- CQI channel quality indicator
- the UE may receive the data symbol sent by the base station by using the at least one first AP on the RE indicated by the RE configuration.
- the UE may further receive, by the base station, the CSI-RS sent by the at least one second AP on the RE indicated by the RE configuration, where the at least one first AP and the at least one second AP are involved in cooperation in the CoMP system.
- the APs may measure interference of the at least one first AP to the at least one second AP according to the CSI-RS.
- the UE may compare the expected received value of the CSI-RS with the actual value of the received CSI-RS interfered by the data symbol to obtain interference of the at least one first AP to the at least one second AP.
- the UE receives the CSI-RS and the data symbols sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can measure different access points according to the received CSI-RS. Interference between them can improve CQI accuracy and improve user service quality and system throughput.
- the CSI-RS may be a zero-power CSI-RS or a non-zero-power CSI-RS.
- the CSI-RS may be used to measure a downlink channel, and may also be used to measure interference.
- the CSI-RS measuring the downlink channel may be a non-zero power CSI-RS, and the CSI-RS used to measure the interference may be a zero power CSI-RS or a non-zero power CSI-RS.
- the UE may receive the high layer signaling that carries the RE configuration sent by the base station, and obtain the RE configuration according to the high layer signaling.
- the UE may acquire a predefined RE configuration.
- the UE may receive one or more high-level signaling that is sent by the base station semi-statically, which is not limited by the embodiment of the present invention.
- the RE configuration may also be predefined by the UE and the base station. For example, the UE may pre-define the RE configuration as the RE indicated by the RE configuration is a subset of REs that have been notified by the base station to the UE for transmitting CSI-RS.
- the RE indicated by the RE configuration may be all of the REs used by the base station to transmit the CSI-RS, or all of the REs corresponding to the CSI-RS for measuring the interference, or an empty set.
- the subset herein may be a generalized subset including an empty set, all or part of an RE that can be used to transmit a CSI-RS. Since the RE configuration is predefined, that is, the base station and the UE are well known, the base station is not required to notify the UE through additional high layer signaling, thereby saving signaling overhead.
- the UE may receive, by the base station, high-layer signaling that carries multiple RE configurations and corresponding indexes, and may receive dynamics of the first index corresponding to the RE configuration that is sent by the base station. Signaling, according to the first index, acquiring an RE configuration from a RE configuration set including multiple RE configurations. Since the AP providing data services for the UE can be dynamically transformed in multiple APs in Dynamic Point Selection (DPS), the RE configuration can also be dynamically transformed. Therefore, the UE can obtain the RE configuration set by using one or more high-level signalings that are sent by the base station semi-statically, and dynamically obtain the RE configuration in the currently transmitted subframe according to the dynamic signaling sent by the base station.
- DPS Dynamic Point Selection
- the UE may receive high layer signaling that is sent by the base station and carries at least one first RE configuration and a corresponding index.
- the dynamic signaling that is sent by the base station and carries the first index corresponding to the RE configuration may be received.
- the at least one first RE configuration and the at least one second RE configuration are different from each other. Since in the DPS, the AP providing data services for the UE can be dynamically transformed in multiple APs, the RE configuration can also be dynamically transformed.
- the UE may acquire at least one first RE configuration by using one or more high-level signaling that is sent by the base station semi-statically, and pre-define at least one second RE configuration, so as to obtain at least one first RE configuration and at least one second RE. Configured RE configuration collection. According to the dynamic signaling sent by the base station, the RE allocation in the currently transmitted subframe can be dynamically obtained. Set. In addition, since at least one second RE configuration is predefined, that is, the base station and the UE are well-known, the base station is not required to notify the UE by using additional high layer signaling, and signaling overhead can be saved.
- the UE may receive dynamic signaling that is sent by the base station and carries a corresponding first index of the RE configuration.
- a RE configuration is obtained from a RE configuration set including at least one RE configuration, wherein at least one RE configuration and a corresponding index may be predefined.
- the RE configuration can also be dynamically transformed. Therefore, the UE can dynamically obtain the RE configuration in the currently transmitted subframe by pre-defining the RE configuration set including at least one RE configuration, and according to the dynamic signaling sent by the base station.
- the RE configuration set is predefined, that is, the base station and the UE are well known, the base station is not required to notify the UE through additional high layer signaling, thereby saving signaling overhead.
- the UE may perform demodulation and channel decoding on the data symbol as a useful data symbol or a useless data symbol. For example, when the data symbol is used as a useless data symbol, the UE can set the data symbol to a fixed value (for example, set to 0), or set the confidence corresponding to the data symbol to 0 or infinity.
- a fixed value for example, set to 0
- the UE may perform demodulation and channel decoding on the data symbol as a useful data symbol or a useless data symbol according to dynamic signaling sent by the base station, where dynamic signaling may be used to indicate the data symbol.
- Useful data symbols or useless data symbols may be used to indicate the data symbol.
- the high layer signaling may include bitmap coding, where a bit in the bitmap coding corresponds to a pilot pattern of the CSI-RS, and an antenna corresponding to the pilot pattern of the CSI-RS
- the number of ports can be 1, 2, 4 or 8.
- the value of the bit in the bitmap encoding is 1, it can indicate that the corresponding RE can map the data symbol.
- the value of the bit in the bitmap encoding is 0, it can indicate that the corresponding RE cannot map the data symbol.
- the RE configuration may include a period and a subframe offset.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- the UE receiving the base station is used to transmit the CSI-RS on the RE.
- the CSI-RS and data symbols sent by different access points enable the UE to measure the interference between different access points according to the received CSI-RS, which can improve the channel quality indication accuracy, thereby improving the UE's service quality and system. Throughput.
- FIG. 3 is a schematic flowchart of a method of transmitting data according to another embodiment of the present invention.
- the method of Figure 3 is performed by a base station, such as macro base station 101 in the application scenario of Figure 1.
- the RE indicated by the RE configuration is a subset of the REs that can be used to transmit the CSI-RS and can map the data symbols.
- the base station may notify the UE of one or more RE configurations, which is not limited in this embodiment of the present invention.
- the RE indicated by the RE configuration is a subset of REs that can be used to transmit CSI-RS, and the subset described herein may be a generalized subset, that is, the RE indicated by the RE configuration may be an RE that can be used to transmit CSI-RS. A part of the REs may also be an RE that can be used to transmit the CSI-RS, which is not limited by the embodiment of the present invention.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- multiple APs can provide data services for one or more UEs at the same time.
- API and AP2 in Figure 1 can provide data services for UE1 or UE2 at the same time.
- the UE receiving the CoMP service may perform measurement of the downlink channel with the AP according to the CSI-RS.
- the UE also needs to perform interference measurement according to the CSI-RS.
- the UE cannot measure the interference between the APs according to the CSI-RS, which leads to inaccurate interference measurement, affects the accuracy of the CQI, and thus affects the service quality of the user and the throughput of the system.
- the base station may send the data symbol to the UE by using the at least one first AP on the RE indicated by the RE configuration.
- the CSI-RS may also be sent to the UE by using the at least one second AP on the RE indicated by the RE configuration, where the at least one first AP and the at least one second AP are multiple APs participating in the cooperation in the CoMP system.
- the UE may measure interference of the at least one first AP to the at least one second AP according to the CSI-RS. For example, the UE may compare the expected received value of the CSI-RS with the actual value of the CSI-RS after being interfered by the data symbol, and obtain at least one first AP pair. Interference from a second AP.
- the UE receives the CSI-RS and the data symbols sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can measure different access points according to the received CSI-RS. Interference between them can improve CQI accuracy and improve UE's quality of service and system throughput.
- the base station may send high layer signaling carrying the RE configuration to the UE.
- the high-layer signaling may be sent by the base station in a semi-static manner, and the number of the high-layer signaling may be one or more, which is not limited by the embodiment of the present invention.
- the base station may send, to the UE, high layer signaling that carries multiple RE configurations and corresponding indexes, and sends dynamic signaling that carries the first index corresponding to the RE configuration to the UE.
- the RE configuration belongs to a RE configuration set including multiple RE configurations.
- the higher layer signaling may be sent by the base station semi-statically.
- the number of the high layer signaling may be one or more, which is not limited by the embodiment of the present invention.
- the base station can send one or more high layer signaling to the UE semi-statically, so that the UE acquires the RE configuration set. Then, by sending dynamic signaling to the UE, the UE can dynamically acquire the RE configuration in the currently transmitted subframe.
- the base station may send, to the UE, high layer signaling that carries at least one first RE configuration and a corresponding index, and send a dynamic message that carries the first index corresponding to the RE configuration to the UE.
- the RE configuration belongs to an RE configuration set including at least one first RE configuration and at least one second RE configuration, wherein the at least one second RE configuration and the corresponding index may be predefined.
- the at least one first RE configuration and the at least one second RE configuration are different from each other.
- the base station can send the one or more high-level signaling to the UE in a semi-static manner, so that the UE can acquire at least one first RE configuration, and pre-define at least one second RE configuration that is well-known to the UE, so that the UE can acquire at least A set of RE configurations of a first RE configuration and at least one second RE configuration. And then by sending dynamic signaling to the UE, The UE may dynamically acquire the RE configuration in the currently transmitted subframe.
- at least one second RE configuration is predefined, that is, the base station and the UE are well known, the UE does not need to be notified by additional high layer signaling, and signaling overhead can be saved.
- the base station may send, to the UE, dynamic signaling that carries a first index corresponding to the RE configuration, where the RE configuration belongs to an RE configuration set including at least one RE configuration, where at least one RE
- the configuration and corresponding indexes can be predefined.
- the base station can dynamically indicate that the UE dynamically acquires the RE configuration in the currently transmitted subframe by dynamically defining a RE configuration set including at least one RE configuration.
- the RE configuration set is predefined, that is, the base station and the UE are well known, the base station is not required to notify the UE through additional high layer signaling, thereby saving signaling overhead.
- the base station may map data symbols on the RE indicated by each RE configuration in the RE configuration set, and delete each RE configuration device according to the transmission requirement of the CSI-RS. The data symbols mapped on the remaining REs other than the RE indicated by the RE configuration.
- the high layer signaling may include bitmap coding, where a bit in the bitmap coding corresponds to a pilot pattern of the CSI-RS, and the number of antenna ports corresponding to the pilot pattern of the CSI-RS is 1, 2, 4 or 8.
- bitmap coding when the value of the bit in the bitmap encoding is 1, it can indicate that the corresponding RE can map the data symbol.
- the value of the bit in the bitmap encoding is 0, it can indicate that the corresponding RE cannot map the data symbol.
- the CSI-RS may be a zero power CSI-RS or a non-zero power CSI-RS.
- the RE configuration may include a period and a subframe offset.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- the UE receives the CSI-RS and the data symbol sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can receive according to the received
- the CSI-RS measures interference between different access points, thereby improving CQI accuracy and improving the quality of service of the UE and the throughput of the system.
- FIG. 4 is a schematic flow chart of a process of a method of transmitting data according to another embodiment of the present invention.
- two APs and two UEs are taken as an example for description.
- the API and AP2 are two APs participating in the CoMP system, and UE1 and UE2 are in the CoMP system.
- UE1 and UE2 acquire a RE configuration from a base station, where the RE indicated by the RE configuration is a subset of REs that can be used to transmit CSI-RS and can map data symbols.
- the CSI-RS may include CSI-RS1 transmitted through the API and CSI-RS2 transmitted through the AP2. Therefore, the RE for transmitting the CSI-RS includes an RE for transmitting CSI-RS1 and an RE for transmitting CSI-RS2.
- the RE configuration may include a period and a subframe offset.
- UE1 and UE2 may receive one or more high layer signaling that is sent by the base station semi-statically, and acquire the RE configuration according to the high layer signaling.
- the RE indicated by the RE configuration may be the RE used to transmit the CSI-RS2.
- an AP that provides data services for UE1 and UE2 can dynamically change between API and AP2, so the RE configuration can also be dynamically transformed.
- UE1 and UE2 may receive one or more high layer signaling that is sent by the base station semi-statically, where the high layer signaling carries a RE configuration set including multiple RE configurations and a corresponding index of multiple RE configurations.
- UE1 and UE2 may receive dynamic signaling sent by the base station and carry an index corresponding to the RE configuration in the currently transmitted subframe, and obtain an RE configuration from the RE configuration set.
- UE1 and UE2 may receive one or more higher layer signalings that are semi-statically transmitted by the base station and carry at least one first RE configuration and a corresponding index. And obtaining, according to the dynamic signaling that is sent by the base station and carrying the corresponding index of the RE configuration in the currently transmitted subframe, acquiring the RE configuration from the RE configuration set including the at least one first RE configuration and the at least one second RE configuration, where at least one The second RE configuration and the corresponding index may be pre-defined by UE1 and UE2, and are also known by the base station, so that the base station can notify the UE semi-statically without high-level signaling, which can save signaling overhead.
- UE1 and UE2 may receive dynamic signaling that is sent by the base station and that carries a first index corresponding to the RE configuration, and obtains an RE configuration, at least one RE configuration, and corresponding from the RE configuration set that includes the at least one RE configuration according to the first index.
- the index may be predefined by UE1 and UE2 and the base station. Therefore, the base station can notify the UE semi-statically without high-level signaling, which can save signaling overhead.
- the RE indicated by the RE configuration is an example of a RE for transmitting CSI-RS2 and capable of mapping data symbols.
- UE1 and UE2 receive data symbols sent by the base station through the API on the RE for transmitting CSI-RS2.
- CSI-RS2 may be zero power CSI-RS2 or non-zero power CSI-RS2.
- UE1 and UE2 perform demodulation and channel coding on the received data symbols.
- UE1 and UE2 may demodulate and channel encode the received data symbols as useful data symbols or useless data symbols.
- the base station may indicate, by dynamic signaling, that UE1 and UE2 use the data symbols as useful data symbols or useless data symbols.
- the UE2 measures the interference of the API on the AP2 according to the CSI-RS2. Since the UE2 receives the data symbol and the CSI-RS2 on the RE transmitting the CSI-RS2, the received CSI-RS2 is the CSI-RS2 after the data symbol interference transmitted by the API, and the expected reception value and interference to the CSI-RS2 After comparing the actual values of CSI-RS2, it can measure the API to dry AP2. Disturb. In the prior art, UE2 cannot measure the interference of the API to AP2.
- FIG. 4 is only intended to provide a better understanding of the embodiments of the present invention, and not to limit the scope of the embodiments of the present invention.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- the UE receives the CSI-RS and the data symbols sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can measure different access points according to the received CSI-RS. Interference between them can improve CQI accuracy and improve user service quality and system throughput.
- 5a and 5b are schematic diagrams of examples of CSI-RS pilot patterns according to another embodiment of the present invention.
- Each AP has four antenna ports, and the Cyclic Prefix (CP) is used as an example.
- CP Cyclic Prefix
- the embodiments of the present invention are also applicable to other numbers of APs, for example, two or more APs, and the number of antenna ports of each AP is not limited. 4, can also be 8, and so on.
- the embodiment of the present invention is also applicable to the extended CP (Extended CP), which is not limited by the embodiment of the present invention.
- FIG. 5a is a schematic diagram of an example of a CSI-RS pilot pattern corresponding to the API.
- Fig. 5b is a schematic diagram showing an example of a CSI-RS pilot pattern corresponding to AP2.
- API and AP2 For example, API and AP2, UE1 and UE2 in the application scenario of FIG. In Figures 5a and 5b, it is assumed that the API provides data services for UE1 and AP2 provides data services for UE2.
- the UE may obtain the RE configuration according to the high layer signaling sent by the base station, and the RE of the RE configuration indication is the RE for the CSI-RS2 and can map the symbols. Therefore, the base station can transmit the data symbols to the UE1 through the API on the RE for transmitting the CSI-RS2, and both the UE1 and the UE2 can receive the data symbols sent by the base station through the API on the RE for transmitting the CSI-RS2.
- UEl can use data symbols as useful data symbols or useless data symbols. Line demodulation and channel coding.
- the UE2 can also receive the CSI-RS2 sent by the base station to the UE2 through the AP2 on the RE for transmitting the CSI-RS2, and then the UE2 can measure the interference of the API to the AP2 according to the received CSI-RS2 interfered by the data symbol.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- the UE receives the CSI-RS and the data symbols sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can measure different access points according to the received CSI-RS. Interference between them can improve CQI accuracy and improve user service quality and system throughput.
- FIGS. 6a and 6b are schematic diagrams showing an example of a CSI-RS pilot pattern according to another embodiment of the present invention.
- Each AP has four antenna ports, and the common CP is used as an example.
- the embodiments of the present invention are also applicable to other numbers of APs, for example, two or more APs, and the number of antenna ports of each AP is not limited. 4, can also be 8, and so on.
- the embodiment of the present invention can also be used to extend the CP (Extended CP), which is not limited by the embodiment of the present invention.
- FIG. 6a is a schematic diagram of an example of a CSI-RS pilot pattern corresponding to the API.
- Fig. 6b is a schematic diagram showing an example of a CSI-RS pilot pattern corresponding to AP2.
- API and AP2 For example, API and AP2, UE1 and UE2 in the application scenario of FIG. It is assumed in Fig. 6 that the API provides data services for UE1 and AP2 provides data services for UE2.
- the UE1 can learn, according to the dynamic signaling sent by the base station, the index of the RE configuration in the currently transmitted subframe as the index of the second RE configuration, so as to know the current RE configuration.
- the indicated RE is an RE for transmitting CSI-RS2 and is capable of mapping data symbols. Therefore, the base station can transmit the data symbols to the UE1 through the API on the RE for transmitting the CSI-RS2, and then both UE1 and UE2 can receive the data symbols transmitted by the base station through the API on the RE for transmitting the CSI-RS2.
- UE1 may demodulate and channel encode data symbols as useful data symbols or useless data symbols.
- the UE2 may also receive the CSI-RS2 sent by the base station to the UE2 through the AP2 on the RE for transmitting the CSI-RS2, and then the UE2 may measure the interference between the API and the AP2 according to the received CSI-RS2 interfered by the data symbol. .
- the UE2 can learn, according to the dynamic signaling sent by the base station, the index of the RE configuration in the currently transmitted subframe as the index of the first RE configuration, so as to know the current RE configuration.
- the indicated RE is an RE for transmitting CSI-RS1 and is capable of mapping data symbols. Therefore, the base station can transmit data symbols to the UE2 through the AP2 on the RE for transmitting the CSI-RS1, and then both UE1 and UE2 can receive the data symbols transmitted by the base station through the AP2 on the RE for transmitting the CSI-RS1.
- UE2 may demodulate and channel encode the data symbols as useful data symbols or useless data symbols.
- the UE1 may also receive the CSI-RS1 sent by the base station to the UE1 through the API on the RE for transmitting the CSI-RS1, and then the UE1 may measure the interference of the AP2 to the API according to the received CSI-RS1 interfered by the data symbol.
- the UE receives the CSI-RS and the data symbols sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can measure different access points according to the received CSI-RS. Interference between them can improve CQI accuracy and improve user service quality and system throughput.
- 7a and 7b are schematic diagrams of examples of CSI-RS pilot patterns in accordance with another embodiment of the present invention.
- two APs are taken as an example, and each AP has four antenna ports, and an ordinary CP is taken as an example for description.
- an ordinary CP is taken as an example for description.
- these are only for convenience of description, and are not intended to limit the scope of the embodiments of the present invention.
- the embodiments of the present invention may also be applied to other numbers of APs, for example, two or more APs, and the number of antenna ports of each AP is not Limited to 4, it can be 8 or so.
- the embodiment of the present invention is also applicable to the extended CP (Extended CP), which is not limited by the embodiment of the present invention.
- FIG. 7a is a schematic diagram of an example of a CSI-RS pilot pattern corresponding to the API.
- Fig. 7b is a schematic diagram showing an example of a CSI-RS pilot pattern corresponding to AP2.
- the RE configuration can also be dynamically transformed. Therefore, the UE may acquire at least one first RE configuration by using one or more high-level signaling that is sent by the base station semi-statically, and the at least one second RE configuration and the corresponding index may be predefined by the UE and the base station, so that the acquisition includes at least one A set of RE configurations of the first RE configuration and the at least one second RE configuration. Then, according to the dynamic signaling sent by the base station, the RE configuration in the currently transmitted subframe is dynamically obtained. In addition, since at least one second RE configuration is predefined by the UE and the base station, the base station is not required to notify the UE by high layer signaling, and signaling overhead can be saved.
- UE1 and UE2 may receive a high-level signaling that the base station transmits semi-statically and carries the first RE configuration and the corresponding index, assuming that the RE indicated by the first RE configuration is an RE for transmitting CSI-RS2.
- the second RE configuration and the corresponding index are defined in advance.
- the RE of the second RE configuration indication is an RE for transmitting CSI-RS1 and an RE for transmitting CSI-RS2, but cannot map data symbols.
- the second RE configuration is well known to UE1, UE2, and the base station.
- API and AP2 For example, API and AP2, UE1 and UE2 in the application scenario of FIG. It is assumed in Fig. 7 that the API provides data services for UE1 and AP2 provides data services for UE2.
- the UE1 can learn, according to the dynamic signaling sent by the base station, that the index of the RE configuration in the currently transmitted subframe is the index of the first RE configuration, so as to know the current RE configuration.
- the RE is an RE for transmitting CSI-RS2 and is capable of mapping data symbols. Therefore, the base station can transmit the data symbol to the UE1 through the API on the RE for transmitting the CSI-RS2, and then both the UE1 and the UE2 can receive the base station on the RE for transmitting the CSI-RS2.
- Data symbols sent via the API. UE1 may demodulate and channel encode data symbols as useful data symbols or useless data symbols.
- the UE2 may also receive the CSI-RS2 sent by the base station to the UE2 through the AP2 on the RE for transmitting the CSI-RS2, and then the UE2 may measure the interference between the API and the AP2 according to the received CSI-RS2 interfered by the data symbol. .
- the UE2 can learn, according to the dynamic signaling sent by the base station, that the index of the RE configuration in the currently transmitted subframe is the index of the second RE configuration, so as to obtain the indication of the current RE configuration.
- the RE is an RE for transmitting CSI-RS1 and an RE for transmitting CSI-RS2, but cannot map data symbols. Since UE1 does not need to measure the interference of AP2 to the API at this time, the base station will not send data symbols to UE2 through AP2 on the RE for transmitting CSI-RS1 and the RE for transmitting CSI-RS2.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- the UE receives the CSI-RS and the data symbols sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can measure different access points according to the received CSI-RS. Interference between them can improve CQI accuracy and improve user service quality and system throughput.
- FIG. 8 is a block diagram of a user equipment in accordance with one embodiment of the present invention.
- An example of the user equipment of FIG. 8 may be UE1 or UE2 in FIG.
- the user equipment 800 includes an acquisition unit 810 and a reception unit 820.
- the obtaining unit 810 acquires the RE configuration, and the RE indicated by the RE configuration is a subset of the REs that can be used to transmit the CSI-RS and is capable of mapping data symbols.
- the receiving unit 820 receives the data symbols transmitted by the base station on the RE indicated by the RE configuration according to the RE configuration.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- the user equipment 800 may further include a measurement unit 830.
- Receiving order The element 820 can receive the data symbol transmitted by the base station through the at least one first AP on the RE indicated by the RE configuration.
- the receiving unit 820 may further receive a CSI-RS sent by the base station by using the at least one second AP on the RE indicated by the RE configuration, where the at least one first AP and the at least one second AP are multiple APs participating in the cooperation in the CoMP system.
- the measuring unit 830 may measure interference of the at least one first AP with the at least one second AP according to the CSI-RS.
- the UE receives the CSI-RS and the data symbols sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can measure different access points according to the received CSI-RS. Interference between them can improve CQI accuracy and improve user service quality and system throughput.
- the acquiring unit 810 may receive, by the base station, high-layer signaling that carries multiple RE configurations and corresponding indexes, and receive dynamic signaling that is sent by the base station and carries a first index corresponding to the RE configuration, according to The first index obtains the RE configuration from a set of RE configurations including multiple RE configurations.
- the acquiring unit 810 may receive, by the base station, the high layer signaling that carries the at least one first RE configuration and the corresponding index, and receive the dynamic signaling that is sent by the base station and carries the first index corresponding to the RE configuration. And obtaining, according to the first index, an RE configuration from a set of RE configurations including at least one first RE configuration and at least one second RE configuration, wherein the at least one second RE configuration and the corresponding index are predefined. Since at least one second RE configuration is predefined, that is, a well-known RE configuration of the base station and the UE, the base station is not required to notify the UE through high layer signaling, and signaling overhead can be saved.
- the acquiring unit 810 may receive dynamic signaling that is sent by the base station and that is corresponding to the first index of the RE configuration, and obtain, according to the first index, the RE configuration from the RE configuration set that includes the at least one RE configuration. , wherein at least one RE configuration and corresponding index may be predefined. Since the RE configuration set is predefined, that is, the base station and the UE are well known, no base station is needed. The UE is notified by higher layer signaling, which can save signaling overhead.
- the user equipment 800 may further include a processing unit 840 for demodulating and channel decoding the data symbols as useful data symbols or useless data symbols.
- the processing unit 840 may perform demodulation and channel decoding on the data symbol as a useful data symbol or a useless data symbol according to dynamic signaling sent by the base station, where the dynamic signaling is used to indicate Data symbols are useful data symbols or useless data symbols.
- the foregoing high layer signaling may include bitmap coding, where a bit in the bitmap coding corresponds to a pilot pattern of a CSI-RS, and a number of antenna ports corresponding to a pilot pattern of the CSI-RS Is 1, 2, 4 or 8.
- the foregoing CSI-RS may be a zero power CSI-RS or a non-zero power CSI-RS.
- the foregoing RE configuration may include a period and a subframe offset.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- the UE receives the CSI-RS and the data symbols sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can measure different access points according to the received CSI-RS. Interference between them can improve CQI accuracy and improve user service quality and system throughput.
- FIG. 9 is a block diagram of a base station in accordance with one embodiment of the present invention.
- An example of the base station 900 of Fig. 9 may be the macro base station 101 of Fig. 1.
- the base station 900 includes a notification unit 910 and a transmitting unit 920.
- the notifying unit 910 notifies the UE of the RE configuration, and the RE indicated by the RE configuration is a subset of the REs that can be used to transmit the CSI-RS and is capable of mapping data symbols.
- the transmitting unit 920 transmits a data symbol to the UE on the RE indicated by the RE configuration according to the RE configuration.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- FIG. 3 For other functions and operations of the base station 900, reference may be made to FIG. 3, FIG. 4, FIG. 5, FIG. 6 and FIG.
- the process involved in the base station in the method embodiment is not repeated here to avoid repetition.
- the sending unit 910 may send the data symbol to the UE by using the at least one first AP on the RE indicated by the RE configuration.
- the sending unit 910 may also send the CSI-RS to the UE by using the at least one second AP on the RE indicated by the RE configuration, where the at least one first AP and the at least one second AP are multiple APs participating in the cooperation in the CoMP system.
- the UE may measure interference of the at least one first AP to the at least one second AP according to the CSI-RS.
- the UE receives the CSI-RS and the data symbols sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can measure different access points according to the received CSI-RS. Interference between them can improve CQI accuracy and improve user service quality and system throughput.
- the notification unit 910 may send the high layer signaling carrying the RE configuration to the UE.
- the notification unit 910 may send, to the UE, high layer signaling that carries multiple RE configurations and corresponding indexes, and send dynamic signaling that carries the first index corresponding to the RE configuration to the UE, where the RE configuration belongs to A set of RE configurations including multiple RE configurations.
- the notification unit 910 may send, to the UE, high layer signaling that carries the at least one first RE configuration and the corresponding index, and send, to the UE, dynamic signaling that carries the first index corresponding to the RE configuration, RE
- the configuration belongs to an RE configuration set including at least one first RE configuration and at least one second RE configuration, wherein at least one second RE configuration and a corresponding index are predefined. Since at least one second RE configuration is predefined, that is, a well-known RE configuration of the base station and the UE, the base station is not required to notify the UE through high layer signaling, and signaling overhead can be saved.
- the notification unit 910 may send, to the UE, dynamic signaling that carries a first index corresponding to the RE configuration, where the RE configuration belongs to an RE configuration set including at least one RE configuration, where at least one RE configuration and corresponding The index can be pre-defined. Since the RE configuration set is predefined, that is, the base station and the UE are well known, the base station is not required to notify the UE through high layer signaling, and the signaling overhead can be saved.
- the sending unit 920 may be in each RE in the RE configuration set. And mapping the data symbols on the indicated REs, and deleting the data symbols mapped on the remaining REs other than the RE indicated by the RE configuration in the RE indicated by each RE configuration according to the transmission requirement of the CSI-RS.
- the foregoing high layer signaling may include bitmap coding, where a bit in the bitmap coding corresponds to a pilot pattern of a CSI-RS, and a number of antenna ports corresponding to a pilot pattern of the CSI-RS Is 1, 2, 4 or 8.
- the foregoing CSI-RS may be a zero power CSI-RS or a non-zero power CSI-RS.
- the foregoing RE configuration may include a period and a subframe offset.
- the RE symbol for transmitting the CSI-RS in the embodiment of the present invention can map the data symbols, so that the UE can receive the data symbols on the RE for transmitting the CSI-RS, thereby improving the utilization efficiency of the RE.
- the UE receives the CSI-RS and the data symbols sent by the base station respectively through different access points on the RE for transmitting the CSI-RS, so that the UE can measure different access points according to the received CSI-RS. Interference between them can improve CQI accuracy and improve user service quality and system throughput.
- a communication system may include the above-described user equipment 800 or base station 900.
- user equipment 800 or base station 900 Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein 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 for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.
- the disclosed systems, devices, and methods may be implemented in other ways.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- 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.
- the mutual 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 in an electrical, mechanical or other form.
- the components displayed by the unit 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.
- 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.
- the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is 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 removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .
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JP2014556907A JP5981568B2 (ja) | 2012-02-20 | 2013-01-31 | データ伝送方法、ユーザ装置、及び基地局 |
US14/461,725 US9985765B2 (en) | 2012-02-20 | 2014-08-18 | Data transmission method, user equipment, and base station |
US15/978,513 US10615937B2 (en) | 2012-02-20 | 2018-05-14 | Data transmission method, user equipment, and base station |
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EP3114775B1 (en) | 2014-03-06 | 2019-07-31 | LG Electronics Inc. | Method for processing received signal of mimo receiver |
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