WO2017075809A1 - Procédé de transmission de signal de référence, équipement utilisateur, station de base et système - Google Patents

Procédé de transmission de signal de référence, équipement utilisateur, station de base et système Download PDF

Info

Publication number
WO2017075809A1
WO2017075809A1 PCT/CN2015/094007 CN2015094007W WO2017075809A1 WO 2017075809 A1 WO2017075809 A1 WO 2017075809A1 CN 2015094007 W CN2015094007 W CN 2015094007W WO 2017075809 A1 WO2017075809 A1 WO 2017075809A1
Authority
WO
WIPO (PCT)
Prior art keywords
crs
resource block
base station
antenna port
domain length
Prior art date
Application number
PCT/CN2015/094007
Other languages
English (en)
Chinese (zh)
Inventor
吴作敏
马莎
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/094007 priority Critical patent/WO2017075809A1/fr
Priority to CN201580082795.8A priority patent/CN107925534A/zh
Publication of WO2017075809A1 publication Critical patent/WO2017075809A1/fr

Links

Images

Classifications

    • 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

Definitions

  • the present invention relates to the field of LTE communications, and in particular, to a method for transmitting a reference signal, a user equipment, a base station, and a system.
  • KPI key performance indicator
  • the event triggering in the motion interaction game requires less than 25ms; the car-to-car communication in autonomous driving requires less than 30ms of delay; at the remote control
  • the Round-Trip Time (RTT) requires less than 50ms of delay; the demand for delay in smart grid power automation is less than 8ms; the requirement for delay in call setup in public security is less than 300ms, and end-to-end (E2E) media file transfer requires less than 150ms of latency.
  • the scheduling interval of the physical layer that has the most obvious impact on the delay in the air interface technology is 10 ms in the Wideband Code Division Multiple Access (WCDMA) to the high speed.
  • the High-Speed Packet Access (HSPA) is shortened to 2ms, and the Transmission Time Interval (TTI) of Long Term Evolution (LTE) or Long Term Evolution (LTE-A) is shortened. To 1ms.
  • the LTE physical layer needs to introduce a short transmission time interval Short-TTI frame structure to further shorten the scheduling interval.
  • the TTI can be shortened from 1 ms to 1 time domain symbol to 0.5 ms.
  • the time domain symbol mentioned above may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol in an LTE system.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the duration (1 ms) of one subframe includes 14 time domain symbols. If the base station transmits data to the user equipment in the time domain symbol 3 of the downlink, the user equipment (User Equipment, UE) will be in the time domain symbol of the uplink. 7 feedback, the base station will receive feedback on the time domain symbol 11, at this time from the base station The length of data to receive feedback is 8 time domain symbols, which is about 0.57ms. Compared with 1ms TTI transmission, the delay is greatly shortened.
  • the short TTI transmission can only use the CRS appearing before the scheduled symbol to perform channel estimation.
  • the channel information on the time domain symbol can only be obtained by extrapolation of the CRS, thereby failing to meet the demodulation requirements in high speed and high order modulation scenarios.
  • the embodiment of the present invention provides a method for transmitting a reference signal, a user equipment, a base station, and a system, which can enable some time domain symbols with poor performance when using the first CRS for channel estimation, thereby improving channel estimation accuracy by using the supplementary CRS, thereby It can improve the demodulation performance of short TTI transmission in high speed or high order modulation scenarios.
  • the first aspect of the embodiments of the present invention provides a method for transmitting a reference signal, which may include: first, a base station configures a first CRS for a resource block, where an antenna port of the first CRS is a cell-specific antenna port, and the resource block is For transmitting information transmitted between the base station and the UE, the information includes a data part and a reference signal part; wherein the antenna port of the first CRS refers to an antenna port that transmits the first CRS, for example, if the antenna port of the first CRS is transmitted For port 0 and port 1, for the base station, the first CRS is sent through port 0 and port 1, and for the UE, the first CRS is received through port 0 and port 1.
  • the base station reconfigures the supplemental CRS for the resource block, and supplements the antenna port of the CRS with the same or different antenna port of the antenna port of the first CRS; for the resource block, the layout of the CRS in the prior art (ie, the first CRS Layout)
  • the data portion of the resource block can be demodulated, since the short TTI mode is adopted, especially when the length of the short TTI is only one or two symbols, in order to reduce the influence of delay, for some of the resource blocks
  • Data on a resource unit, such as symbol 3 and symbol 10 can only obtain channel information on the symbol by extrapolation of the CRS, and since the distance from the symbol containing the CRS closest to symbol 3 may be three symbols or more,
  • the demodulation performance in high-speed, high-order modulation scenarios has an impact. Therefore, the CRS can be supplemented by the layout in the resource block so that the UE can demodulate such a symbol demodulated by the extrapolation of the CRS by supplementing the CRS.
  • the base station transmits resource blocks.
  • the reference signal part of the information carried by the resource block includes a first CRS and a supplementary CRS, and after receiving the resource block, the data part of the information carried on the resource block can be first carried by the resource block.
  • CRS and supplemental CRS demodulation to improve demodulation performance.
  • the supplementary CRS may include a second CRS, that is, in the case that the first CRS is insufficient, the same can be added in the resource block as the first CRS.
  • the second CRS base station of the antenna port supplements the CRS for the resource block configuration, including:
  • the base station configures a second CRS for the antenna port of the at least one first CRS within the resource block.
  • the antenna port of the first CRS has port 0 and port 1.
  • the second CRS can be configured only on port 0, regardless of port 1, or only on port 1 regardless of port 0. Or configure it on both ports.
  • the supplementary CRS further includes a third CRS, the supplementary CRS antenna port is a third CRS antenna port, and the third CRS antenna The port is different from the antenna port of the first CRS.
  • the UE has more antenna ports than the antenna ports of the first CRS, and the supplementary CRS may include a third CRS, which may be a UE.
  • the proprietary reference signal may be a cell-specific reference signal, or may be a certain group in the cell, for example, a reference signal that can be identified by all UEs supporting short TTI, and transmitting a third through an antenna port different from the first CRS. CRS to satisfy the demodulation of such UEs.
  • the base station supplementing the CRS for the resource block configuration further includes:
  • the base station determines a time domain length and/or a frequency domain length of the resource block
  • the base station determines a third CRS antenna port of the resource block
  • the base station configures a third CRS for the at least one third CRS antenna port according to the time domain length and/or the frequency domain length within the resource block.
  • Such a third CRS needs to take into account the time domain length and/or frequency domain of the resource block when configured in the resource block.
  • the length that is, the length of the time domain of the resource block needs to be several time domain symbols, and the number of PRBs in the frequency domain is long.
  • Each PRB includes 12 subcarriers, and then the antenna port corresponding to the third CRS is configured.
  • the supplementary CRS includes a third CRS
  • the supplementary CRS antenna port is a third CRS antenna port
  • the third CRS antenna port and the antenna port of the first CRS are Different antenna ports
  • the base station configures the supplemental CRS transmitted by the supplemental CRS antenna port for the resource block including:
  • the base station determines a time domain length and/or a frequency domain length of the resource block
  • the base station determines a CRS antenna port of the resource block, where the CRS antenna port includes an antenna port of the first CRS and a third CRS antenna port;
  • the base station configures a third CRS for the at least one third CRS antenna port within the resource block. For the reason why the specific third CRS needs to be configured and the configuration requirements, refer to the second possible implementation manner of the first aspect.
  • the base station determines the time domain length of the resource block and/or In the frequency domain length, the manner in which the base station determines the time domain length has at least the following two types;
  • the base station determines that the time domain length of the resource block is M time domain symbols, and M is an integer not less than 1 and not greater than 14; the length of the resource block is divided according to the number of time domain symbols.
  • the base station determines that the time domain length of the resource block is N subframes, and N is an integer that is not less than 1 and not greater than 10; the length of the resource block is divided according to an integer multiple of the subframe length.
  • the manner in which the base station determines the frequency domain length of the resource block has at least the following manner:
  • the base station determines that the frequency domain length of the resource block is P PRB or RBG or RE or REG, P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth. That is, the frequency domain length may be an integer multiple of the PRB, an integer multiple of the RBG, an integer multiple of the RE or an integer multiple of the REG, and the specific division may be defined in advance.
  • the base station determines that the time domain length of the resource block is M time domain symbols, where M is not less than 1 and not When the integer is greater than 3, the base station configures the third CRS for the at least one third CRS antenna port in the resource block, including:
  • the base station configures one RE for each third CRS antenna port of the at least one third CRS antenna port in each PRB in the resource block;
  • the base station configures the third CRS for the at least one third CRS antenna port in the resource block, including:
  • the base station configures 2 REs for each third CRS antenna port of the at least one third CRS antenna port in each PRB in the resource block;
  • the base station configures the third CRS for the at least one third CRS antenna port in the resource block, including:
  • the base station configures 4 REs for each of the antenna ports of the third CRS in each of the PRBs in each of the PRBs in the resource block.
  • each third CRS of the antenna ports of at least one third CRS in each PRB is different according to the length of the time domain.
  • the antenna port is configured with a different number of REs.
  • the method further includes:
  • the base station sends the number of antenna ports and/or power control parameters of the third CRS by using signaling, which is radio resource control RRC signaling or media access control MAC signaling or physical layer signaling.
  • signaling which is radio resource control RRC signaling or media access control MAC signaling or physical layer signaling.
  • the number of antenna ports of the third CRS and the power control parameters of the third CRS may be sent by the same type of signaling or different types of signaling. If the same type of signaling is used, the independent can be used.
  • the signaling indicates the number of antenna ports of the third CRS and the power control parameter of the third CRS, and may also include the number of antenna ports of the third CRS and the power control parameters of the third CRS in the same signaling.
  • the signaling can be implemented in a variety of different manners, such as radio resource control RRC signaling or media access control MAC signaling or physical layer signaling.
  • the second aspect of the embodiments of the present invention further provides a method for transmitting a reference signal, which may include: determining, by a base station, a time domain length and/or a frequency domain length of the resource block, where the resource block is used to carry information transmitted between the base station and the UE, where The information includes a data portion and a reference signal portion;
  • the base station configures, for the resource block, the first DM-RS transmitted through the first DM-RS antenna port, where the reference The test signal portion includes the first DM-RS;
  • the base station transmits the resource block, and the reference signal portion of the information carried on the resource block includes the first DM-RS.
  • the DMRS transmission can be performed in the case of short TTI transmission.
  • the determining, by the base station, the time domain length and/or the frequency domain length of the resource block, the determining, by the base station, the time domain length of the resource block includes:
  • the base station determines that the time domain length of the resource block is M orthogonal frequency division multiplexing time domain symbols, and M is an integer not less than 1 and not greater than 14;
  • the base station determines that the time domain length of the resource block is N subframes, and N is an integer not less than 1 and not greater than 10;
  • the base station determines the frequency domain length of the resource block, including:
  • the base station determines that the frequency domain length of the resource block is P PRB or RBG or RE or REG, P is an integer that is not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth. That is, the frequency domain length may be an integer multiple of the PRB, an integer multiple of the RBG, an integer multiple of the RE or an integer multiple of the REG, and the specific division may be defined in advance.
  • the base station determines that the time domain length and frequency domain length of the resource block are similar to the third possible implementation of the first aspect.
  • the base station configures Y REs for each antenna port of the first DM-RS of the antenna ports of the first DM-RS in each PRB in the resource block, where Y is the first The number of antenna ports that the DM-RS can support at most.
  • the first DM-RS of different antenna ports uses different reference signal sequences, and the first DM-RS of different antenna ports occupies the same time-frequency resource.
  • the base station configures a first CRS for the resource block, where the antenna port of the first CRS is a cell-specific antenna end Port, the reference signal portion includes the first CRS;
  • the base station transmits the resource block, where the reference signal portion of the resource block includes the first DM-RS, including:
  • the base station transmits a resource block, and the reference signal portion of the resource block includes a first DM-RS and a first CRS.
  • the first DM-RS and the first CRS are coexisting, that is, for data within one resource block, the first DM-RS and the first CRS are required for demodulation.
  • the method further includes:
  • the base station configures a second CRS for the resource block according to the antenna port of the at least one first CRS
  • the base station transmits a resource block, where the reference signal portion of the resource block includes the first DM-RS and the first CRS includes:
  • the base station transmits a resource block, and the reference signal portion of the resource block includes a first DM-RS, a first CRS, and a second CRS.
  • the layout of the first CRS results in poor demodulation performance of data on the resource blocks that should be demodulated by the first CRS, and therefore requires additional supplementation of the second CRS transmitted by the antenna port of the first CRS, which
  • the number of ports of the second CRS may be the same as the number of ports of the first CRS, or may be less than the number of ports of the first CRS.
  • a third aspect of the embodiments of the present invention further provides a method for transmitting a reference signal, where the method may include: receiving, by a UE, a resource block transmitted by a base station, where the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part. And a reference signal portion, the reference signal portion includes a first CRS and a supplementary CRS, the antenna port of the first CRS is a cell-specific antenna port, and the antenna port supplementing the CRS is the same as or different from the antenna port of the first CRS;
  • the UE demodulates the data portion of the information carried on the resource block according to the first CRS and the supplementary CRS.
  • the resource block carrying the first CRS and the supplementary CRS configured by the base station corresponding to the first aspect after receiving the resource block, the UE passes the data of the information on the resource block by using the first CRS and the supplementary CRS. Partially demodulated.
  • the supplementary CRS includes a second CRS and/or a third CRS
  • the antenna port of the second CRS is the same as the antenna port of the first CRS
  • the third CRS The antenna port is different from the antenna port of the first CRS.
  • the supplementary CRS has three different situations, that is, the supplementary CRS is the second CRS, the third CRS, or the second CRS and the third CRS.
  • the second CRS is similar to the first CRS.
  • the data portion of the corresponding information is demodulated, and the third CRS needs to combine the first CRS to demodulate the data portion of the corresponding information.
  • the method further includes
  • the UE determines a time domain length and/or a frequency domain length of the resource block, where the UE determines that the time domain length of the resource block includes:
  • the UE determines that the time domain length of the resource block is M time domain symbols, and M is an integer not less than 1 and not greater than 14;
  • the base station determines that the time domain length of the resource block is N subframes, and N is an integer not less than 1 and not greater than 10;
  • the UE determines the frequency domain length of the resource block to include:
  • the UE determines that the frequency domain length of the resource block is P PRBs or RBGs or REs or REGs, P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth.
  • the determination of the time domain length of the resource block and the determination of the frequency domain length are similar to the fourth possible implementation of the first aspect, and the first possible implementation of the second aspect.
  • the method further includes:
  • the UE determines an antenna port and/or power control parameter of the third CRS according to the signaling.
  • the UE learns the port information and/or the power control parameter of the antenna port of the third CRS by receiving the signaling of the base station, and can demodulate the data portion of the information in the resource block by using the port information and the power control parameter.
  • a fourth aspect of the present invention provides a method for transmitting a reference signal, where the method may include:
  • the UE receives the resource block transmitted by the base station, where the resource block is used to carry information transmitted between the base station and the UE, the information includes a data part and a reference signal part, and the reference signal part includes the first DM-RS, and the antenna of the first DM-RS
  • the port is a UE dedicated demodulation antenna port;
  • the UE demodulates the data portion of the information carried on the resource block according to the first DM-RS.
  • the UE after receiving the resource block, the UE performs the data part of the information on the resource block by using the first DM-RS. demodulation.
  • the method further includes
  • the UE determines a time domain length and/or a frequency domain length of the resource block, where the UE determines that the time domain length of the resource block includes:
  • the UE determines that the time domain length of the resource block is M time domain symbols, and M is an integer not less than 1 and not greater than 14;
  • the base station determines that the time domain length of the resource block is N subframes, and the N is an integer that is not less than 1 and not greater than 10.
  • the UE determines the frequency domain length of the resource block to include:
  • the UE determines that the frequency domain length of the resource block is P PRBs or RBGs or REs or REGs, P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth.
  • the method further includes:
  • the reference signal part further includes a first CRS, and the resource block also carries the first CRS;
  • Demodulating, by the UE, the data portion of the information carried on the resource block according to the first DM-RS includes:
  • the UE demodulates the data portion of the information carried on the resource block according to the first DM-RS and the first CRS.
  • the resource block that carries the first DM-RS and the first CRS is configured, and the UE uses the first DM-RS and the first CRS to the resource block.
  • the data portion of the information is demodulated.
  • the method further includes:
  • the reference signal portion further includes a first CRS and a second CRS, where the resource block further carries the first CRS and the second CRS,
  • the UE demodulates the information carried on the resource block according to the first DM-RS, including:
  • the UE demodulates the data portion of the information carried on the resource block according to the first DM-RS, the first CRS, and the second CRS.
  • the resource block carrying the first DM-RS, the first CRS, and the second CRS is configured, and the UE passes the first DM-RS, the first CRS, and the first The two CRS demodulates the data portion of the information on the resource block.
  • the fifth aspect of the embodiments of the present invention further provides a base station, which may include:
  • a first configuration module configured to configure a first CRS for the resource block, where the antenna port of the first CRS is a cell-specific antenna port, and the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal part;
  • the first configuration module is further configured to configure a supplementary CRS for the resource block, where the antenna port of the supplementary CRS is the same as or different from the antenna port of the first CRS;
  • the first transceiver module is configured to transmit a resource block, and the reference signal portion of the information carried by the resource block includes a first CRS and a supplementary CRS.
  • the base station can implement the transmission method of the reference signal provided by the first aspect.
  • the supplementary CRS includes a second CRS, and the antenna port of the supplementary CRS is the same as the antenna port of the first CRS;
  • the first configuration module is specifically used to:
  • a second CRS is configured within the resource block for the antenna port of the at least one first CRS.
  • the first configuration module in this implementation is used to implement the method involved in the first possible implementation of the first aspect.
  • the supplementary CRS further includes a third CRS, the antenna port of the supplementary CRS is an antenna port of the third CRS, and the third The antenna port of the CRS is different from the antenna port of the first CRS;
  • the first configuration module is specifically used to:
  • a third CRS is configured within the resource block for the antenna port of the at least one third CRS according to the time domain length and/or the frequency domain length.
  • first configuration module in the implementation manner can implement the method involved in the second possible implementation manner of the first aspect.
  • the supplementary CRS includes a third CRS
  • the antenna port of the supplemental CRS is an antenna port of the third CRS
  • the antenna port of the third CRS is coupled to the first CRS.
  • the antenna ports are not the same;
  • the first configuration module is specifically used to:
  • a third CRS is configured within the resource block for the antenna port of the at least one third CRS according to the time domain length and/or the frequency domain length.
  • the first configuration module in the implementation manner can implement the method involved in the third possible implementation manner of the first aspect.
  • the first configuration module is specifically configured to:
  • Determining the time domain length of the resource block is M time domain symbols, and M is an integer not less than 1 and not greater than 14;
  • N is an integer not less than 1 and not greater than 10;
  • the first configuration module is also specifically used to:
  • the frequency domain length of the resource block is determined to be P PRBs or RBGs or REs or REGs, P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth.
  • the first configuration module in the implementation manner can implement the method involved in the fourth possible implementation manner of the first aspect.
  • the time domain length of the resource block is M time domain symbols
  • the first configuration module is specifically configured to:
  • one RE is configured for each antenna port of each third CRS in the antenna port of the at least one third CRS in each PRB in the resource block;
  • M is an integer of not less than 4 and not more than 7, two REs are configured for each of the antenna ports of the third CRS in each of the PRBs in the resource block;
  • an antenna RE of each third CRS of the antenna ports of the at least one third CRS is configured with 4 REs in each PRB within the resource block.
  • the first configuration module in the implementation manner can implement the method involved in the fifth possible implementation manner of the first aspect.
  • the first transceiver module is further configured to:
  • the signaling is radio resource control RRC signaling or medium access control MAC signaling or physical layer signaling.
  • the first transceiver module in the implementation manner can implement the method involved in the sixth possible implementation manner of the first aspect.
  • a sixth aspect of the embodiments of the present invention provides a base station, which may include:
  • a second configuration module configured to determine a time domain length and/or a frequency domain length of the resource block, where the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal part;
  • the second configuration module is further configured to configure a first DM-RS for the resource block, where the antenna port of the first DM-RS is a UE dedicated demodulation antenna port;
  • the second transceiver module is configured to transmit a resource block, where the reference signal portion of the information carried by the resource block includes the first DM-RS.
  • the base station can implement the transmission method of the reference signal provided by the second aspect.
  • the second configuration module Body for:
  • Determining the time domain length of the resource block is M time domain symbols, and M is an integer not less than 1 and not greater than 14;
  • N is an integer not less than 1 and not greater than 10;
  • the second configuration module is also specifically used to:
  • the frequency domain length of the resource block is determined to be P PRBs or RBGs or REs or REGs, P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth.
  • the second configuration module can implement the method involved in the first possible implementation of the second aspect.
  • the second configuration module is specifically configured to:
  • Y REs for each of the antenna ports of the at least one first DM-RS in each PRB within the resource block, where Y is the maximum supported by the first DM-RS
  • the number of antenna ports, the first DM-RS of different antenna ports uses different reference signal sequences, and the first DM-RSs of different antenna ports occupy the same time-frequency resource.
  • the second configuration module can implement the method involved in the second possible implementation of the second aspect.
  • the second configuration module is further used to :
  • the second transceiver module is specifically configured to:
  • the resource block is transmitted, and the reference signal portion of the resource block includes the first DM-RS and the first CRS.
  • the second configuration module can implement the method involved in the third possible implementation of the second aspect.
  • the second configuration module is further configured to:
  • the second transceiver module is specifically configured to:
  • the resource block is transmitted, and the reference signal portion of the resource block includes a first DM-RS, a first CRS, and a second CRS.
  • the second configuration module can implement the method involved in the fourth possible implementation of the second aspect.
  • a seventh aspect of the present invention provides a user equipment, which may include: a third transceiver module, configured to receive a resource block that is transmitted by a base station and carries a first CRS and a supplementary CRS, where the resource block is used to carry between the base station and the UE.
  • the transmitted information includes a data portion and a reference signal portion, the reference signal portion includes a first CRS and a supplementary CRS, the antenna port of the first CRS is a cell-specific antenna port, and the antenna port supplementing the CRS is the same as the antenna port of the first CRS or different;
  • the first demodulation module is configured to demodulate the data portion of the information carried on the resource block according to the first CRS and the supplementary CRS.
  • the user equipment can implement the transmission method of the reference signal of the third aspect.
  • the supplementary CRS includes a second CRS and/or a third CRS
  • the antenna port of the second CRS is the same as the antenna port of the first CRS
  • the third CRS The antenna port is different from the antenna port of the first CRS.
  • the user equipment further includes:
  • a first determining module configured to determine that a time domain length of the resource block is M time domain symbols, where M is an integer not less than 1 and not greater than 14;
  • the time domain length used to determine the resource block is N subframes, and N is an integer not less than 1 and not greater than 10;
  • the first determining module is also used to:
  • the frequency domain length of the resource block is determined to be P PRBs or RBGs or REs or REGs, P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth.
  • the first determining module can implement the second possible implementation manner of the third aspect. The method involved.
  • the third transceiver module is further configured to:
  • the first determining module is also used to:
  • the antenna port and/or power control parameters of the third CRS are determined based on the signaling.
  • the third transceiver module and the first determining module in the implementation manner can implement the method involved in the third possible implementation manner of the third aspect.
  • An eighth aspect of the present invention provides a user equipment, which may include: a fourth transceiver module, configured to receive a resource block transmitted by a base station, where the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal portion, the reference signal portion includes a first DM-RS, and an antenna port of the first DM-RS is a UE-dedicated demodulation antenna port;
  • a second demodulation module configured to demodulate the data portion of the information carried on the resource block according to the first DM-RS.
  • the user equipment can implement the method for transmitting the reference signal of the fourth aspect.
  • the user equipment further includes:
  • a second determining module configured to determine that the time domain length of the resource block is M time domain symbols, and M is an integer that is not less than 1 and not greater than 14;
  • the time domain length used to determine the resource block is N subframes, and N is an integer not less than 1 and not greater than 10;
  • the second determining module is also used to:
  • the frequency domain length of the resource block is determined to be P PRBs or RBGs or REs or REGs, P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth.
  • the second determining module in the implementation manner can implement the method involved in the first possible implementation manner of the fourth aspect.
  • the reference signal part further includes a first CRS, where the resource block further carries the first CRS;
  • the second demodulation module is specifically configured to:
  • the data portion of the information carried on the resource block is demodulated according to the first DM-RS and the first CRS.
  • the second demodulation module in this implementation can implement the method involved in the second possible implementation manner of the fourth aspect.
  • the reference signal part further includes a first CRS and a second CRS
  • the resource block further carries the a CRS and a second CRS
  • the second demodulation module is specifically configured to:
  • the second demodulation module in this implementation can implement the method involved in the third possible implementation manner of the fourth aspect.
  • a ninth aspect of the present invention provides a communication system, which may include:
  • a base station configured to configure a first CRS for the resource block, where the antenna port of the first CRS is a cell-specific antenna port, and the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal part;
  • the antenna port of the supplementary CRS is the same as or different from the antenna port of the first CRS;
  • the reference signal portion of the information of the resource block includes a first CRS and a supplementary CRS;
  • a UE configured to receive a resource block transmitted by the base station
  • It is further configured to demodulate a data portion of information carried on the resource block according to the first CRS and the supplementary CRS.
  • the base station in the system can adopt the base station involved in the fifth aspect
  • the UE in the system can adopt the user equipment involved in the seventh aspect.
  • a tenth aspect of the present invention provides a communication system, which may include:
  • a base station configured to determine a time domain length and/or a frequency domain length of the resource block, where the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal part;
  • the antenna port of the first DM-RS is a UE dedicated demodulation antenna port
  • the reference signal portion of the information of the resource block includes a first DM-RS
  • a UE configured to receive a resource block
  • It is further configured to demodulate a data portion of information carried on the resource block according to the first DM-RS.
  • the base station in the system can adopt the base station involved in the sixth aspect
  • the UE in the system can adopt the user equipment involved in the eighth aspect.
  • the embodiments of the present invention have the following advantages: in the embodiment of the present invention, when the resource block is the first CRS and the supplementary CRS, the supplementary CRS includes three types, namely, the second CRS, the third CRS, and the The second CRS and the third CRS are supplemented with the second CRS because the mode of the short TTI makes the demodulation performance of the first CRS for some data poor, and the addition of the second CRS enables the data with poor demodulation performance by the first CRS to be The first CRS and the second CRS are jointly demodulated, and the third CRS is because the UE supporting the 4 antenna port and the DMRS has a large overhead, and the antenna node is newly configured by properly configuring the first CRS and the supplementary configuration with fewer antenna ports.
  • the third CRS can reduce the overhead of the reference signal in each subframe.
  • the embodiment of the present invention also designs the case that the number of DMRSs in the short TTI mode is insufficient, by first determining the time domain length and frequency of the resource block. The domain length is then configured to configure the first DM-RS according to the time domain length and the frequency domain length of the resource block, so that all the resource blocks have sufficient DMRS.
  • 1a is a round-trip time delay diagram of OFDM symbol data transmission in a prior art LTE system
  • FIG. 1b is a schematic diagram of interaction between a cell base station and a UE in a prior art LTE system
  • FIG. 2 is a schematic diagram of CRS mapping of different antenna ports in a normal subframe in the prior art
  • FIG. 3 is a diagram of an embodiment of a method for transmitting a reference signal according to an embodiment of the present invention
  • FIG. 4a is a diagram showing another embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • FIG. 4b is a diagram showing another embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • 4c is a diagram showing another embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • 4d is a diagram showing another embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • 4e is a diagram showing another embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • 4f is a diagram showing another embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • 4g is a diagram showing another embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • FIG. 5 is a diagram of another embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • FIG. 6 is a diagram showing another embodiment of a reference signal distribution in a signal transmission method according to an embodiment of the present invention.
  • FIG. 7 is a diagram showing an embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • FIG. 8 is a diagram showing an embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • FIG. 9 is a diagram showing an embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • FIG. 10 is a diagram showing an embodiment of a method for transmitting a reference signal according to an embodiment of the present invention.
  • FIG. 11 is a diagram showing an embodiment of a base station according to an embodiment of the present invention.
  • FIG. 12 is a diagram showing an embodiment of a base station according to an embodiment of the present invention.
  • FIG. 13 is a diagram of an embodiment of a user equipment according to an embodiment of the present invention.
  • FIG. 14 is a diagram of an embodiment of a user equipment according to an embodiment of the present invention.
  • Figure 15 is a diagram showing an embodiment of a communication system according to an embodiment of the present invention.
  • Figure 16 is a diagram showing an embodiment of a communication system according to an embodiment of the present invention.
  • FIG. 17 is a diagram showing an embodiment of a base station according to an embodiment of the present invention.
  • FIG. 18 is a diagram of an embodiment of a user equipment according to an embodiment of the present invention.
  • the embodiment of the present invention provides a method for transmitting a reference signal, which is used to enable time-domain symbols with poor performance when using the first CRS for channel estimation, thereby improving channel estimation accuracy through the supplementary CRS, thereby enabling high-speed or high-order Improve the demodulation performance of short TTI transmission in the modulation scenario.
  • the scheduling interval of the physical layer with the most obvious impact on the air interface technology is 10 milliseconds (Williband, Wideband Code Division Multiple Access (WCDMA)). Ms), shortened to 2ms for High-Speed Packet Access (HSPA) and 1ms for Long Term Evolution (LTE).
  • WCDMA Wideband Code Division Multiple Access
  • Ms Ms
  • HSPA High-Speed Packet Access
  • LTE Long Term Evolution
  • the LTE physical layer needs to introduce a Short Transmission Time Interval (TTI) to further shorten the scheduling interval. That is, the TTI can be shortened from the normal 1 ms to an integer number of symbols less than 1 ms.
  • the symbol mentioned above may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol in an LTE system, and may also be referred to as a time domain symbol.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the short TTI lengths of the above lines and downlinks are all 1 time domain symbols as an example. As shown in FIG. 1a, it is a Round-Trip Time (RTT) delay map for data transmission of 1 OFDM symbol.
  • RTT Round-Trip Time
  • HARQ Hybrid Automatic Repeat Request
  • ACK acknowledgement character
  • NACK Negative Acknowledgment
  • the RTT of the data transmission is 8 symbols, which is about 576 microseconds, and an LTT of 8 ms is required for transmission of 1 ms TTI, and the delay is greatly shortened.
  • a transmission mode based on CRS and DMRS demodulation can be supported.
  • the UE can only perform channel estimation and demodulation using the scheduled short TTI and the previously occurring CRS. If the length of the short TTI is only one or two time domain symbols, for some symbols, such as OFDM Symbol 3, OFDM symbol 10, etc., channel information on the symbol can only be obtained by extrapolation of the CRS, and the time distance of a symbol containing the CRS closest to the symbol may be 3 symbols for high-speed, high-order modulation.
  • the demodulation performance under the scenario has an impact.
  • the short TTI since the current demodulation reference signals are all designed based on 1ms TTI, if the short TTI also needs to support the transmission mode based on DMRS demodulation, it is necessary to redesign the DMRS for each scheduling unit of the short TTI. If the system has both a UE supporting a transmission mode of CRS demodulation based on 4-antenna port and a UE supporting a transmission mode based on DMRS demodulation, considering that it is necessary to simultaneously configure CRS and additional DMRS of 4 antenna ports, each The reference signal overhead of a sub-frame is large, and therefore, the overhead of the supplemental CRS needs to be properly controlled.
  • the reference signal overhead of each subframe is large, and the short TTI scheduling of the transmission mode using DMRS demodulation requires each scheduling unit to have Two problems with DMRS require redesigning the reference signal when there is a short TTI transmission in the system.
  • FIG. 1b is a schematic diagram of interaction between a cell base station and a UE in the LTE system in the prior art; wherein, the coverage of the cell base station 101 is within the coverage of the cell base station 101 and is performed with the cell base station 101.
  • the UE 102 and the UE 103 are in communication; the cell base station 101 is a base station of the LTE system, the UE 102 and the UE 103 are corresponding UEs in the LTE system, the cell base station 101 and the UE 102 are both devices supporting short TTI transmission, and the UE 103 does not support short TTI transmission. device of.
  • the cell base station 101 can communicate with the UE 102 using a short TTI or a normal 1 ms TTI; the cell base station 101 can communicate with the UE 103 using a normal 1 ms TTI.
  • the symbols mentioned in the technical solutions of the embodiments of the present invention may be OFDM symbols, and one OFDM symbol includes a Cyclic Prefix (CP) part and an information segment part, where the information section part includes one OFDM symbol. All information; CP is a repetition of a part of the information segment signal.
  • the symbol mentioned in the technical solution of the embodiment of the present invention may be one OFDM symbol in the LTE or LTE-A system, and may also be a symbol of other types of communication, which is not limited by the present invention.
  • the time length of one radio frame is 10 ms
  • the time length of one subframe is 1 ms
  • one radio frame includes 10 sub-times. frame.
  • NCP Normal Cyclic Prefix
  • ECP Extended Cyclic Prefix
  • one ECP subframe includes 12 OFDM symbols or 2 slots; the OFDM symbol is numbered from 0 to 11, and the 0th to the 5th The OFDM symbols are odd slots, and the sixth to eleventh OFDM symbols are even slots.
  • the smallest unit is the subcarrier. From the time-frequency two-dimensional joint view, the minimum unit is the resource element (Resource Element, RE) for the resource used for one antenna port transmission.
  • RE Resource Element
  • One RE includes one OFDM symbol in the time domain and one subcarrier in the frequency domain.
  • a Resource-Element Group may contain an integer number of REs, for example, one REG may contain 4 or 16 REs.
  • a physical resource block (PRB) includes one time slot in the time domain, 12 subcarriers in the frequency domain, and one PRB pair in one subframe.
  • a Resource Block Group (RBG) may contain an integer number of PRBs. For example, one RBG may contain one, two, three, four or other integer number of PRBs.
  • the time domain length of the resource block can be represented by the number of symbols
  • the frequency domain length of the resource block can be represented by the number of PRBs or RBGs or subcarriers or REs or REGs.
  • the system bandwidth can be represented by an integer number of PRBs or an integer number of subcarriers or an integer number of REs or an integer number of REGs.
  • a 10M system bandwidth can be represented by 50 PRBs or 600 subcarriers or 600 REs, or when one REG contains 4 REs, a 10M system bandwidth can be represented by 150 REGs. It should be noted that the system bandwidth can also be represented by an integer number of RBGs.
  • the system bandwidth is 10M or 50 PRBs, and 1 RBG includes 3 PRBs, the system bandwidth includes 17 RBGs, and the last RBG only contains 2 PRB.
  • the NCP subframe format is taken as an example, and the ECP subframe format can be derived.
  • the base station can configure a cell-specific antenna port for the cell user, and the number of the dedicated antenna ports of the cell can be 1, 2, or 4.
  • the base station configures port 0 for the cell user; when the number of cell-specific antenna ports is 2, the base station configures port 0 and port 1 for the cell user; When the number is 4, the base station configures port 0, port 1, and end for the cell user.
  • Port 2 and port 3. The base station configures the CRS on the resource block according to the configured cell-specific antenna port and the predefined cell-specific reference signal (CRS) pattern of the corresponding cell-specific antenna port, and transmits the resource block carrying the CRS to the cell user.
  • CRS cell-specific reference signal
  • the cell user can use the CRS for Automatic Gain Control (AGC) adjustment, time-frequency synchronization, Radio Resource Management (RRM) measurement, control channel demodulation, and channel state information.
  • AGC Automatic Gain Control
  • RRM Radio Resource Management
  • CSI Channel State Information
  • FIG. 2 shows the RE of the CRS mapping of different antenna ports in the normal subframe of the prior art.
  • the position of the PRB pair, where the symbol R p represents the RE of the reference signal of the cell-specific antenna port p, and the line in FIG. 2 in which the fill pattern is in the lower left or upper right direction indicates that the RE on which the fill pattern is located is an existing CRS. Since the corresponding signal transmissions on different antenna ports are distinguished by using different spatial resources, when the REs on one antenna port are used to transmit CRS, the REs on other antenna ports do not transmit any information, so CRS transmissions of different antenna ports are performed.
  • the resources are separated by time and frequency.
  • a physical downlink control channel (PDCCH) occupies the first two symbols of a subframe.
  • the other is a Multimedia Broadcast multicast service ingle frequency network (MBSFN) subframe.
  • MBSFN Multimedia Broadcast multicast service ingle frequency network
  • the CRS is transmitted only in the non-MBSFN area of the MBSFN subframe, where the non-MBSFN of the MBSFN subframe
  • the area may refer to the area occupied by the PDCCH, which is usually the first 1 to 2 symbols of the subframe.
  • the number of PDCCH symbols of one MBSFN subframe is 2, when the number of ports of the CRS is 1 or 2, CRS is transmitted only on the first symbol of the MBSFN subframe; when the number of ports of the CRS is 4, The CRS is transmitted only on the first two symbols of the MBSFN subframe.
  • the UE in all embodiments of the present invention can be wirelessly accessed by a mobile phone, a computer or a portable, pocket-sized, handheld, computer-integrated, in-vehicle mobile device capable of exchanging voice or data with a wireless access network.
  • RAN Radio Access Network
  • the base station in all the embodiments of the present invention may be an evolved base station (eNB), a macro base station, a micro base station, a pico base station, an access point (AP), a transmission point (TP), and a far destination (TP). Remote Radio Head (RRH), etc.
  • eNB evolved base station
  • AP access point
  • TP transmission point
  • TP far destination
  • RRH Remote Radio Head
  • FIG. 3 is a schematic diagram of a method for transmitting a reference signal according to an embodiment of the present invention. As shown in FIG. 3, a method for transmitting a reference signal according to an embodiment of the present invention may include the following steps:
  • the base station configures a first CRS for the resource block.
  • the antenna port of the first CRS is a cell-specific antenna port, and the resource block is used to carry information transmitted between the base station and the UE, and the information includes a data part and a reference signal part.
  • the data part of the information includes control information and/or data information, which is specifically carried on a physical channel
  • the physical channel includes one or a combination of the following: PDCCH, PDSCH, and enhanced physical downlink control channel (Enhanced) -Physical Downlink Control CHannel (EPDCCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid ARQ indicator channel (PHICH), or the same function in some new standards.
  • Enhanced physical -Physical Downlink Control CHannel EPDCCH
  • PCFICH Physical Control Format Indicator Channel
  • PHICH Physical Hybrid ARQ indicator channel
  • the channel with different name such as the control channel or data channel introduced in the short TTI transmission
  • the control information for scheduling the resource block may not be carried on the resource block.
  • the UE may determine the time domain length of the resource block by demodulating the control information of the resource block or a predefined manner.
  • the data part of the information does not contain any information, that is, the information carried by the resource block only includes the reference signal part
  • the antenna port information of the first CRS is generally determined by the base station.
  • the base station can obtain the antenna port information of the first CRS by using the UE in multiple manners.
  • the base station may notify the UE of the antenna port information of the first CRS by means of RRC signaling, MAC signaling, or physical layer signaling.
  • the base station may perform cyclic redundancy check on a physical broadcast channel (PBCH).
  • PBCH physical broadcast channel
  • CRC Cyclic Redundancy Check
  • the first CRS may be transmitted on multiple different subframes.
  • the first CRS may be a CRS transmitted on a normal subframe.
  • the first CRS is a CRS transmitted on an MBSFN subframe.
  • the antenna port of the first CRS changes according to the change of the number of antenna ports of the first CRS configured by the base station for the resource block. For example, if the base station is a resource block. The number of antenna ports of the first CRS is set to 1, and the antenna port of the first CRS is port 0 at this time. For another example, if the number of antenna ports of the first CRS configured by the base station for the resource block is 2, the antenna port of the first CRS is port 0 and port 1 at this time. For another example, if the number of antenna ports of the first CRS configured by the base station for the resource block is 4, the antenna ports of the first CRS are port 0, port 1, port 2, and port 3.
  • the size of the resource block may be configured according to actual conditions.
  • the resource block size may be all available resources of the system integer subframes, for example, the resource block time domain includes A sub-frame containing the entire system bandwidth in the frequency domain.
  • the resource block size can be a complete set of all available resources of the system.
  • the resource block size may be a subset of all available resources of the system, for example, the resource block size is determined by a scheduling manner of short TTI transmission, and the frequency domain includes an integer number of PRBs or an integer number of RBGs or an integer number of subcarriers, in time domain. Contains an integer number of symbols.
  • the size of the resource block can also be configured according to other rules as long as the short TTI transmission requirement is met.
  • the resource block may be a subset or a complete set of all available resources of the system. Therefore, the base station configures the first CRS for the resource block, and specifically, the base station is configured for all available resources of the system. First CRS. Alternatively, the base station configures the first CRS for the resource block, and may also configure the first CRS for the resource that includes the resource block. Alternatively, the base station configures the first CRS for the resource block, and specifically, the base station only configures the first CRS for the resource block.
  • the base station configures a supplementary CRS for the resource block configured with the first CRS.
  • the antenna port of the supplementary CRS is the same as or different from the antenna port of the first CRS, and the reference signal part includes the first CRS and the supplementary CRS.
  • the antenna port of the first CRS refers to an antenna port that transmits the first CRS, for example, for the case where only one port transmits the first CRS, to transmit the antenna of the first CRS. If the port is port 0 as an example, the first CRS is sent by the port 0 for the base station, and the first CRS is received by the port 0 for the UE; for example, the first CRS is transmitted for multiple ports. In the case where the antenna port transmitting the first CRS is port 0 and port 1, for the base station, the first CRS is sent through the port 0 and the port 1, and for the UE, the port 0 and the port 1 are received. The first CRS.
  • the antenna port of the second CRS and the antenna port of the third CRS appearing subsequently in the embodiment of the present invention are similar to this case.
  • the UE when performing short TTI transmission on the UE by using the CRS demodulation-based transmission mode, in order to reduce the delay, the UE can only use the scheduled short TTI and the previously appearing CRS. Perform channel estimation and demodulation. If the length of the short TTI is only one or two time domain symbols, for some symbols, such as OFDM symbol 3, OFDM symbol 10, etc., the channel information on the symbol can only be obtained by extrapolation of the CRS, and the symbol is closest to the symbol.
  • the time distance of a symbol containing CRS may be 3 symbols, which has an impact on the demodulation performance in high-speed and high-order modulation scenarios. Therefore, in this case, it is necessary to supplement the CRS on the basis of the first CRS. Improve the demodulation performance of short TTI.
  • step 302 there is no absolute order relationship between step 302 and step 301.
  • the antenna port information of the supplementary CRS may be determined in various manners.
  • the antenna port information supplementing the CRS is determined by the base station.
  • the antenna port information of the supplementary CRS is determined by the UE and the antenna port information of the supplementary CRS is reported to the base station by using signaling.
  • the antenna port information supplementing the CRS is predefined.
  • the supplementary CRS includes a second CRS, and the antenna port of the supplementary CRS is the same as the antenna port of the first CRS.
  • the base station configures a first CRS whose antenna port is port 0 and port 1 for the resource block, and the base station configures a second CRS for the resource block configured with the first CRS, where the antenna port of the second CRS is port 0 and port 1. It is the same as the antenna port of the first CRS.
  • the supplementary CRS includes a third CRS, and the antenna port of the supplementary CRS is different from the antenna port of the first CRS.
  • the base station configures a first CRS whose antenna port is port 0 and port 1 for the resource block, and the base station configures a third CRS for the resource block configured with the first CRS, where the antenna port of the third CRS is Port 2 and port 3 are different from the antenna ports of the first CRS.
  • the number of antenna ports of the first CRS may be 1, 2, 4, and up to four, and the corresponding four ports are port 0, port 1, port 2, and port 3, respectively.
  • the antenna port of a CRS is only port 0 and port 1.
  • the antenna port of the third CRS may be port I and port I+1, and the port I and port I+1 It can be port 2 and port 3, or the port I and port I+1 are other port numbers.
  • the antenna port of the first CRS is only port 0, the number of antenna ports of the third CRS is 1 or 3.
  • the antenna port of the third CRS may be a port.
  • the port I can be port 1 or other port numbers that are not port 2 and port 3; when the number of antenna ports of the third CRS is 3, the antenna port of the third CRS can be port I, port I +1 and port I+2, the port I, port I+1 and port I+2 may be port 1, port 2 and port 3, or the port I, port I+1 and port I+2 may be other ports
  • the antenna port of the third CRS is a virtual antenna port of the first CRS, and the UE needs to combine the first CRS and the third CRS to complete operations such as CSI measurement, data channel demodulation, and the like.
  • the supplementary CRS includes the foregoing second CRS and the third CRS, that is, the antenna port of the second CRS and the first CRS in the antenna port of the supplementary CRS.
  • the antenna ports are the same, and the antenna port of the third CRS is different from the antenna port of the first CRS.
  • the base station configures a first CRS whose antenna port is port 0 and port 1 for the resource block, and the base station configures a second CRS and a third CRS for the resource block configured with the first CRS, where the second CRS antenna
  • the port is port 0 and port 1.
  • the antenna port of the third CRS is port 2 and port 3. That is, some of the antenna ports of the supplementary CRS are the same as the antenna ports of the first CRS, and some antenna ports are the first.
  • the antenna ports of the CRS are different.
  • the supplementary CRS in the embodiment of the present invention may be specifically divided into three cases, the first case, the supplementary CRS includes only the second CRS, and the second case, the supplementary CRS includes only the third CRS; Both the second CRS and the third CRS are included; these three scenarios are described below.
  • the supplementary CRS only includes the second CRS.
  • the supplementary CRS includes only the second CRS.
  • the base station configures the supplementary CRS for the resource block, and the base station configures the second CRS for the antenna port of the at least one first CRS in the resource block.
  • the antenna port of the first CRS has port 0 and port 1.
  • the second CRS is configured, if the CRS that needs to be supplemented in the resource block involves only one port, it can be configured only on port 0, regardless of port 1. Or only configure on port 1 without considering port 0.
  • the CRS that needs to be supplemented in the resource block only involves two ports, and then it is configured on both ports. If there are four cases of the first CRS antenna port, Then, the second CRS is configured on 1 to 4 ports according to supplementary requirements.
  • the base station may determine, according to the location or density of the first CRS, a location of the second CRS corresponding to the antenna port of the first CRS in the resource block.
  • each filling pattern is expressed as follows: a line whose filling pattern is in the lower left or upper right direction indicates that the RE of the filling pattern is the first A CRS, the line in which the fill pattern is in the upper left or lower right direction indicates that the RE on the RE where the fill pattern is located is the second CRS, and the line in which the fill pattern is in the longitudinal direction indicates that the RE on which the fill pattern is located is the third CRS.
  • the first CRS is a position of a CRS-mapped RE of a cell-specific antenna port in a normal subframe in a PRB pair
  • a symbol Rp represents an RE of a reference signal of the antenna port p
  • a second CRS is located according to the first CRS.
  • There are 168 REs in a PRB pair where the density of the first CRS is 16/168, and the symbol of the first CRS is 0, 4, 7, and 11. Considering the time domain position, it can be in symbol 2 and symbol 9.
  • the second CRS is supplemented with one RE for each of port 0 and port 1 respectively; considering the frequency domain position, the reference signals of the supplemental port 0 and port 1 are equal in the frequency domain.
  • the density of the supplemental first CRS and second CRS within one PRB pair is 20/168.
  • the first CRS is the position of the RE of the CRS mapping of the four cell-specific antenna ports in the normal subframe in the PRB pair, and the symbol Rp represents the RE of the reference signal of the antenna port p.
  • the CRS density of port 2 and port 3 is smaller than the CRS density of port 0 and port 1, so the base station can refer to port 2 and port 3 on symbol 1 and symbol 8 in the first CRS on symbols 5 and 12
  • the signal pattern complements the second CRS corresponding to port 2 and port 3.
  • FIG. 4b is only a schematic diagram in which the positions of the reference signals of the second CRS corresponding to the port 2 and the port 3 are interchangeable.
  • the UE that uses the normal 1ms TTI transmission and the UE that uses the short TTI transmission may exist in the system.
  • the UE reports the CSI measurement information to the base station to the base station to use the CSI information to schedule the UE.
  • the time is shortened, and the gain of fast CSI feedback can be obtained in a high-speed scenario, so the CRS can be supplemented according to the length of the scheduled TTI.
  • the base station configures the supplementary CRS for the resource block, and the base station configures the supplementary CRS according to the time domain length and/or the frequency domain length of the resource block.
  • the base station may first determine the time domain length and/or the frequency domain length of the resource block scheduled to be sent to the UE.
  • the length of the TTI may be an integer number of time domain symbols less than 14, for example, the number of time domain symbols of each scheduled TTI is 1, 2, 3, 4, 5, 6, 7, etc.;
  • the scheduling length may be the same as the length of the 1ms TTI scheduling, or may be longer or shorter than the length of the 1ms TTI scheduling.
  • the base station configures, in the resource block, the second CRS for the antenna port of the at least one first CRS according to the time domain length and/or the frequency domain length of the resource block.
  • the base station may determine, according to the time domain length and/or the frequency domain length of the resource block and the location or density of the first CRS in the resource block, the second CRS corresponding to the antenna port of the first CRS. The location within the resource block.
  • the first CRS is the location of the CRS mapped RE of the four cell-specific antenna ports in the normal subframe in the PRB pair, and the symbol Rp represents the RE of the reference signal of the antenna port p. .
  • the subframe can be divided into four short TTIs, wherein the lengths of the first and third short TTIs are 4 symbols, and the lengths of the 2nd and 4th short TTIs are 3 symbols, which can be represented by FIG. 4b. It can be seen that the CRSs of port 2 and port 3 are not included in the scheduling resource blocks of the 2nd and 4th short TTIs.
  • the base station can base the symbols in the first CRS in the resource blocks of the second and fourth short TTIs.
  • the reference signal patterns of port 2 and port 3 on 1 and 8 complement the second CRS of port 2 and port 3.
  • one subframe may include multiple short TTIs of different lengths, or may only include one short TTI of length.
  • one subframe contains short TTIs of two symbols and four symbols. 4c, 4d, 4e, and 4f respectively show that when the number of antenna ports of the first CRS is 2, and the length of the TTI is 1, 2, 3, or 4 time domain symbols, the second is added according to the length of the TTI.
  • An example of a CRS in which the port of the second CRS is port 0 or port 1.
  • the second CRS is a cell-specific reference signal, that is, a reference signal that can be recognized by all UEs in the cell.
  • the second CRS is a group-specific reference signal, such as a reference signal that can be recognized by a UE that supports short TTI transmission of one or more lengths.
  • the second CRS is a UE-specific reference signal, and only the reference signal that is scheduled to be recognized by the UE that includes the resource block of the second CRS.
  • the second CRS is a UE-specific reference signal, and the base station indicates, by signaling, whether the second CRS exists in the UE and/or indicates a location of the second CRS in the resource block.
  • the transmit powers of the second CRS and the first CRS are the same or different.
  • the base station may notify the UE of the transmit power of the second CRS and the first CRS by using RRC signaling or MAC signaling, or physical layer signaling, or a predefined manner.
  • the specific notification manner is similar to the manner in which the antenna port information of the first CRS is notified to the UE in the description of the step 301 in the first embodiment, and details are not described herein again.
  • the second CRS and the first CRS are reference signals having the same feature, for example, the first CRS and the second CRS do not carry the precoding matrix information, or the first CRS and the second CRS both carry the precoding. Matrix information. Since the antenna port of the first CRS and the antenna port of the second CRS are the same, the UE may perform AGC adjustment, time-frequency synchronization, RRM measurement, control channel demodulation, CSI measurement, data channel demodulation, etc. in conjunction with the first CRS and the second CRS. operating.
  • the supplementary CRS only includes the third CRS.
  • the base station can provide services for multiple UEs in one cell, and therefore different scenarios in which different UEs have different requirements for the configured number of CRS antenna ports may occur.
  • the base station configures a first CRS for all UEs in a cell, and configures a first CRS and a supplementary CRS for the UE with the newly added antenna port requirement, where the supplementary CRS includes only the third CRS, the third CRS, and the first CRS.
  • the antenna ports are different.
  • the newly added antenna ports configured by the base station for different UEs may be the same or different.
  • the base station may configure a first CRS of 2 antenna ports for all UEs (eg, UEs transmitting using 1 ms and short TTI), and a third CRS configured with 2 new antenna ports for all UEs using short TTI transmissions.
  • the base station can configure the first of one antenna port for all UEs.
  • the CRS is a third CRS in which a part of the UE is configured with one new antenna port, and the other part of the UE is supplemented with a third CRS in which three new antenna ports are configured.
  • the base station configures the supplemental CRS for the resource block, and the base station configures the third CRS for the antenna port of the at least one third CRS in the resource block.
  • the first CRS is a position of a CRS-mapped RE of a cell-specific antenna port in a normal subframe in a PRB pair, and a symbol Rp represents an RE of a reference signal of the antenna port p.
  • the antenna ports of the first CRS are port 0 and port 1; the antenna ports of the third CRS are port 2 and port 3, and the CRS mapping RE of the third CRS corresponding CRS antenna port 2 and port 3 is given in PRB in FIG. The position of the center.
  • the base station supplements the third CRS of the corresponding port 2' and the port 3' according to the reference signal patterns of the port 2 and the port 3 in the first CRS on the symbols 1 and 8, and according to the symbol 1 and the symbols 1 and 12
  • the reference signal pattern on symbol 8 supplements the third CRS corresponding to port 2 and port 3.
  • the base station may configure, in the resource block, a third CRS for the antenna port of the at least one third CRS according to the time domain length and/or the frequency domain length of the resource block.
  • the base station may first determine the time domain length and/or the frequency domain length of the resource block scheduled to be sent to the UE.
  • the first CRS is a position of a CRS mapped RE of a 2 cell dedicated antenna port in a normal subframe, and a symbol Rp indicates a reference signal of the antenna port p. RE.
  • the subframe can be divided into four short TTIs, wherein the lengths of the first and third short TTIs are 4 symbols, and the lengths of the second and fourth short TTIs are 3 symbols.
  • the base station may supplement the third CRS corresponding to port 2 and port 3 respectively in the scheduling resource blocks of the short TTI.
  • the base station determines that the time domain length of the resource block is M time domain symbols, where M is an integer that is not less than 1 and not greater than 14; and/or, the base station determines the resource block.
  • the time domain length is N subframes, where N is an integer not less than 1 and not more than 10.
  • the base station determines that the frequency domain length of the resource block is P PRB or RBG or RE or REG, where P is an integer not less than 1 and not greater than Q, and Q is a PRB number or RBG number or RE corresponding to the system bandwidth. Number or REG number.
  • the base station configuration supplementing the CRS includes at least one of the following steps: when M is not less than 1 and not greater than 3 The number of times, the base station configures one RE for each antenna port of the third CRS in the antenna port of the at least one third CRS in each PRB in the resource block; when M is an integer not less than 4 and not more than 7 The base station configures 2 REs for each of the antenna ports of the third CRS in each of the PRBs in each of the PRBs; when M is an integer not less than 8 and not greater than 14 The base station configures 4 REs for each of the at least one third CRS antenna port in each PRB in the resource block.
  • one subframe may include multiple different short TTI lengths, or may only include one short TTI length.
  • 4c to 4g respectively show an example in which the port of the first CRS is port 0 and port 1, and the length of the TTI is 1, 2, 3, 4, and 7 symbols, and the third CRS is supplemented according to the above principle.
  • the port of the third CRS is port 2 and port 3.
  • the third CRS may be set to multiple types of reference signals, for example, the third CRS may be a cell-specific reference signal, ie, a reference signal that can be recognized by all UEs within the cell. As another example, the third CRS can be a group-specific reference signal, such as a reference signal that can be recognized by a UE that supports one or more lengths of short TTI transmission.
  • the third CRS may be set to multiple types of reference signals, for example, the third CRS may be a cell-specific reference signal, ie, a reference signal that can be recognized by all UEs within the cell.
  • the third CRS can be a group-specific reference signal, such as a reference signal that can be recognized by a UE that supports one or more lengths of short TTI transmission.
  • the third CRS is a UE-specific reference signal, and only the reference signal that is scheduled by the UE that is allocated to the resource block that includes the third CRS, or the UE only has the antenna port configured with the third CRS, the base station The UE is supplemented with a third CRS on the resource block on which the UE is scheduled.
  • the third CRS is a UE-specific reference signal, and the base station indicates, by signaling, whether the third CRS exists in the UE and/or indicates a location of the third CRS in the resource block.
  • the transmit powers of the third CRS and the first CRS are the same or different.
  • the base station may notify the UE of the transmit power of the third CRS and the first CRS by using RRC signaling or MAC signaling or physical layer signaling or a predefined manner. The relationship, or the relationship between the third CRS and the transmit power of the data, or the transmit power information of the third CRS.
  • the third CRS and the first CRS are reference signals having the same feature, for example, the first CRS and the third CRS do not carry precoding matrix information, or the first CRS and the third CRS both carry precoding matrix information. Since the antenna port of the first CRS and the antenna port of the third CRS are different, the antenna port of the third CRS can be regarded as the virtual antenna port of the first CRS, and the UE needs to determine the antenna port of the third CRS, so that the first CRS can be combined. And the third CRS performs operations such as AGC adjustment, time-frequency synchronization, RRM measurement, control channel demodulation, CSI measurement, and data channel demodulation.
  • the base station may enable the UE to determine an antenna port of the third CRS in multiple manners. For example, the base station may notify the UE of the port information used to determine the antenna port of the third CRS by means of RRC signaling or MAC signaling or physical layer signaling, etc.; the base station may perform the CRC on the PDCCH that schedules the UE.
  • the method of the scrambling code notifies the UE of the port information for determining the antenna port of the third CRS; the base station may notify the UE of the port information for determining the antenna port of the third CRS in a predefined manner; when the base station has multiple When the carrier is used, the base station may also notify the UE of the port information of the carrier port of the carrier that is used to determine the third CRS by using the signaling of the non-local carrier, and the method may be used to notify the UE to select according to the actual situation.
  • the port information used to determine the antenna port of the third CRS may be the number of antenna ports of the third CRS, the antenna port number of the third CRS, or the total number of CRS antenna ports.
  • the total number of the CRS antenna ports includes the number of antenna ports of the third CRS and the number of antenna ports of the first CRS. Since the UE can determine the number of antenna ports of the first CRS, the CRS antenna can be adopted. The total number of ports calculates the number of antenna ports of the third CRS. Correspondingly, the UE may determine the number of antenna ports of the third CRS or the antenna port number of the third CRS according to the port information of the antenna port for determining the third CRS.
  • the UE needs to demodulate the PDCCH before determining whether to receive a Physical Downlink Shared CHannel (PDSCH).
  • PDSCH Physical Downlink Shared CHannel
  • the UE demodulates the PDCCH using only the first CRS.
  • the UE demodulates the PDCCH using only the third CRS.
  • the UE needs to jointly use the first CRS and the third CRS to demodulate the PDCCH. It can be understood that the UE needs to determine the number of antenna ports of the third CRS or the antenna port number of the third CRS before using the third CRS.
  • the channel estimation can be made more accurate.
  • the base station can put the partial transmission power of the data on the symbol to the symbol.
  • the transmission power of the reference signal is increased to improve the performance of the channel estimation.
  • the UE needs to determine the power information of the reference signal and the data in order to correctly demodulate the data.
  • the base station notifies the UE of the power control parameter information of the reference signal and the data transmission, and the power control parameter information may include at least one of the following information: the pilot data power on the symbol of the first CRS and the supplementary CRS Ratio; pilot data power ratio on symbols without first CRS and supplemental CRS; data power on symbols with first CRS and supplemental CRS and no The ratio of the data power on the symbols of a CRS and the supplementary CRS; the number of antenna ports of the first CRS; the number of antenna ports of the third CRS; and the sum of the number of antenna ports of the first CRS and the third CRS.
  • the supplementary CRS includes a second CRS and a third CRS.
  • the base station may provide services for multiple UEs in one cell, and may also include situations in which the second CRS and the third CRS need to be supplemented, for example, the number of CRS antenna ports required by different UEs may be configured.
  • the number of CRS antenna ports required by a part of UEs is more than the number of CRS antenna ports required by other UEs, and for example, for all UEs in the cell, the number of first CRSs in the resource blocks is insufficient, resulting in Performance in various scenarios such as high speed or high-order modulation cannot be guaranteed.
  • the base station may configure the first CRS and the second CRS for the UEs in one cell, and further configure the third CRS and the second CRS antenna for the UEs with the newly added antenna port requirements in the UEs.
  • the port is the same as the antenna port of the first CRS, and the third CRS is different from the antenna port of the first CRS.
  • the method includes: a second CRS configuration step: the base station configures a second CRS for the antenna port of the at least one first CRS in the resource block; and a third CRS configuration step: the base station A third CRS is configured within the resource block for the antenna port of the at least one third CRS.
  • the specific second CRS configuration step is similar to the foregoing scenario 1.
  • the specific The three CRS configuration steps are similar to the above case 2.
  • the details are not described here.
  • the second CRS and the third CRS can be the same type of reference signals, for example, the second CRS and the third CRS are both cell-specific reference signals, or the second CRS and the third CRS are group-specific reference.
  • the signal, or the second CRS and the third CRS are UE-specific reference signals.
  • the second CRS and the third CRS may be different types of reference signals, for example, the second CRS is a group-specific reference signal, the third CRS is a UE-specific reference signal, or the second CRS is a UE-specific reference signal, and the third CRS Is a group-specific reference signal.
  • the second CRS and the third CRS are both cell-specific reference signals, or the second CRS and the third CRS are group-specific reference.
  • the signal, or the second CRS and the third CRS are UE-specific reference signals.
  • the second CRS and the third CRS may be different types of reference signals, for example, the second CRS is a group-specific reference signal, the third CRS is
  • the first CRS is a location of a CRS mapped RE of a two cell-specific antenna port in a normal subframe in a PRB pair, and a symbol Rp indicates a reference signal of the antenna port p.
  • the second CRS is a group-specific reference signal corresponding to CRS antenna port 0 and port 1, the second CRS can be identified by all UEs supporting short TTI transmission;
  • the third CRS is a UE-specific reference corresponding to CRS antenna port 2 and port 3.
  • the third CRS may be configured with a third CRS antenna port and scheduled to be identified by the UE carrying the resource block of the third CRS.
  • FIG. 4c to FIG. 4g respectively show that the number of antenna ports of the first CRS is 2, and the number of time domain symbols of the short TTI is 1, 2, 3, 4, respectively. Distribution of the first CRS, the second CRS, and the third CRS in the PRB pair.
  • the RE of the second CRS and the RE of the third CRS are not in the resource block.
  • the CRS of one antenna port is configured, of course, if it is configured in the second CRS and the third CRS step configured according to the above configuration of the second CRS step.
  • the three CRSs are configured in the same RE on the resource block, they can be configured according to the current requirements of the system. For example, if the current demand for the third CRS is large, the third CRS has a higher priority in configuration.
  • the third CRS may be preferentially configured on the RE in the case of the same RE overlap in the second CRS and the third CRS; for example, the current demand for the second CRS is large, that is, only a small part of the UE in the cell needs to use the first
  • the third CRS is used to complete the signal processing at the receiving end. More UEs need to use the second CRS to assist the channel estimation, so that the demodulation performance of the receiving end can be guaranteed in a high-speed or high-order scenario. At this time, for the second CRS and the third CRS.
  • the second CRS may be preferentially configured on the RE. It should be noted that the manner in which the system is configured according to the current requirements of the system requires the base station to notify the UE of the antenna port corresponding to the CRS on the RE.
  • the rule when there occurs an overlap between the second CRS and the third CRS on the RE of the resource block, the most efficient allocation is flexibly according to the current situation.
  • the rule when When the second CRS and the third CRS overlap on the RE of the resource block, the rule may be defined in advance, that is, when the overlap occurs, the second CRS or the third CRS is uniformly configured.
  • the first CRS and the second CRS have the same antenna virtualization mode
  • the first CRS and the third CRS may have the same antenna virtualization mode, or may have different antenna virtualization modes.
  • the number of antenna ports configured by the base station to the first CRS is 2
  • the number of antenna ports of the third CRS is also 2
  • the base station has 8 physical antennas.
  • the antenna port of each first CRS and the antenna port of each third CRS may correspond to two physical antennas, that is, Two physical antennas transmit information carried by the same antenna port; or, each antenna port of the first CRS corresponds to two physical antennas, and each antenna port of the third CRS corresponds to one physical antenna, that is, each first CRS antenna
  • the information carried by the port is sent by two physical antennas, and the information carried by each third CRS antenna port is sent by one physical antenna.
  • the base station transmits a resource block that carries the first CRS and the supplementary CRS.
  • the base station transmits the resource block.
  • the resource block carries only the first CRS and the supplementary CRS.
  • the resource block carries other information, such as control information and/or data information, in addition to the first CRS and the supplementary CRS. Wait.
  • the base station may notify the UE of the size of the resource block by means of a predefined or signaling indication.
  • the manner in which the base station notifies the time domain length and the frequency domain length of the resource block may be the same or different.
  • the base station may specify the length of the resource block in a predefined manner, and notify the frequency domain length of the resource block of the UE by means of signaling indication; the base station may also notify the time domain length and frequency of the resource block by means of signaling indication. Domain length.
  • the step 303 may specifically be: the base station transmits the first CRS and a resource block of the second CRS;
  • the step 303 may be specifically: the base station transmits the resource block carrying the first CRS and the third CRS;
  • the step 303 may specifically be: the base station transmits the resource block carrying the first CRS, the second CRS, and the third CRS.
  • the The density of the first CRS in the resource block enables the CRS to guarantee performance in various scenarios such as high-speed or high-order modulation; when the antenna port of the supplementary CRS is different from the antenna port of the first CRS, it can support different intra-cells.
  • the UE uses different CRS antenna ports for data transmission.
  • a method for transmitting a reference signal may include the following steps:
  • the base station determines a time domain length and/or a frequency domain length of the resource block.
  • the resource block is used to carry information transmitted between the base station and the UE, and the information includes a data part and a reference signal part.
  • the data part of the information includes control information and/or data information, which is specifically carried on a physical channel
  • the physical channel includes one or a combination of the following: PDCCH, PDSCH, and enhanced physical downlink control channel (Enhanced) -Physical Downlink Control CHannel (EPDCCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid ARQ indicator channel (PHICH), or the same function in some new standards.
  • Enhanced physical -Physical Downlink Control CHannel EPDCCH
  • PCFICH Physical Control Format Indicator Channel
  • PHICH Physical Hybrid ARQ indicator channel
  • the channel with different name such as the control channel or data channel introduced in the short TTI transmission
  • the control information for scheduling the resource block may not be carried on the resource block.
  • the UE may determine the time domain length of the resource block by demodulating the control information of the resource block or a predefined manner.
  • the data part of the information does not contain any information, that is, the information carried by the resource block only includes the reference signal part
  • the resource block is a resource block for signal transmission scheduled to the UE, and therefore the size of the resource block, that is, the time domain length and/or the frequency domain length of the resource block, needs to be determined.
  • the resource block size may be a subset of all available resources of the system, which is determined by the scheduling mode of the base station, that is, the frequency domain includes an integer number of PRBs or an integer number of RBGs or an integer number of subcarriers, and the time domain includes an integer number of symbols.
  • the default time domain length is 7 time domain symbols or 14 time domain symbols, that is, 1 time slot corresponding to the existing division mode. Or one subframe, if the length of the time domain is determined and the frequency domain length is not determined, the default division mode is adopted, that is, the frequency domain length is the frequency domain length of one PRB or one RBG.
  • the base station determines the time domain length and/or the frequency domain length of the resource block in multiple manners. Specifically, the base station determines the time domain length of the resource block, and at least one of the following manners may be adopted.
  • Manner 1 The base station determines that the time domain length of the resource block is M time domain symbols, and M is an integer not less than 1 and not greater than 14.
  • the base station determines that the time domain length of the resource block is N subframes, and N is an integer that is not less than 1 and not greater than 10.
  • the base station determines that one subframe includes an integer number of resource blocks, where each resource block may have the same time domain length, for example, one subframe includes seven resource blocks with a TTI length of 2 symbols, or one subframe includes Two resource blocks with a TTI length of 7 symbols; the time domain length of each resource block may also be different. For example, one subframe includes 4 resource blocks, and the corresponding TTI lengths are 4, 3, and 4 respectively. 3 symbols.
  • the base station determines that the frequency domain length of the resource block is P PRB or RBG or RE or REG, P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth.
  • the base station configures a first DM-RS for the resource block.
  • the antenna port of the first DM-RS is a UE-dedicated demodulation antenna port, and the reference signal portion includes the first DM-RS.
  • the configuration process of the first DM-RS can be performed. Specifically, the antenna port of the first DM-RS is first determined, and the port information of the antenna port can be determined by the base station; The antenna port of the first DM-RS may be reported to the base station by using the signaling. The antenna port of the first DM-RS may also be predefined, and the base station and the UE are defined according to the foregoing. The antenna port of the first DM-RS is determined.
  • the base station After determining the time domain length and/or the frequency domain length in step 701, the base station configures the first number of REs of the first DM-RS in each PRB according to the length of the time domain. DM-RS.
  • the base station determines that the time domain length of the resource block is M time domain symbols, and the base station configuring the first DM-RS includes the following steps according to the time domain length of the resource block. at least one:
  • the base station configures the first DM-RS according to the antenna port of the first DM-RS, and includes:
  • the base station configures one RE for each antenna port of the first DM-RS of the antenna ports of the at least one first DM-RS in each PRB in the resource block;
  • the allocation situation of the first DM-RS is similar to the case of the third CRS distribution in the second case in the embodiment shown in FIG. 3.
  • the base station configures the first DM-RS according to the antenna port of the first DM-RS, and includes:
  • the base station configures 2 REs for each antenna port of the first DM-RS of the antenna ports of the at least one first DM-RS in each PRB in the resource block;
  • the allocation situation of the first DM-RS is similar to the case of the third CRS distribution in the second case in the embodiment shown in FIG. 3.
  • the base station configures the first DM-RS according to the antenna port of the first DM-RS, and includes:
  • the base station configures 4 REs for each of the antenna ports of the first DM-RS of the at least one first DM-RS in each PRB within the resource block.
  • M may also adopt an alternate manner of 3 and 4 values, that is, the time domain length of the resource block is not a layer unchanged, but is composed of four time domain symbols and three The length of the time domain symbol is alternately composed.
  • the maximum number of antenna ports that can be supported by the first DM-RS is Y, and the corresponding port is port A to port (A+Y-1); when the base station determines the resource block
  • the domain length is M time domain symbols, and M is an integer not greater than 7.
  • the base station determines that the number of antenna ports of the first DM-RS of the UE is X, and the corresponding port is port A to port (A+X-1);
  • Configuring the first DM-RS includes at least one of the following:
  • the base station configures X REs for each antenna port of the first DM-RS in each PRB in the resource block; wherein the first DM-RSs of different antenna ports use different reference signal sequences, and different antenna ports
  • the first DM-RS occupies the same time-frequency resource.
  • the base station configures Z REs for each antenna port of the first DM-RS in each PRB in the resource block, where Z may be a predefined value or the number of antenna ports that the first DM-RS can support at most Y.
  • the first DM-RS of the different antenna ports uses different reference signal sequences. When X is greater than 1, the first DM-RS of some or all of the X antenna ports occupy the same time-frequency resource. For example, if Y is 4 and Z is 2, when X is equal to 2, the first DM-RS of port A and port (A+1) occupy the same time-frequency resource, specifically for each resource block.
  • the first DM-RS of port A and port (A+1) occupy the same time-frequency resource, specifically, each REB in the resource block occupies 2 REs, port (A+2) and The first DM-RS of the port (A+3) occupies the same time-frequency resource, and specifically takes another 2 REs in each PRB in the resource block.
  • the base station configures Z REs for each antenna port of the first DM-RS in each PRB in the resource block, where Z is a value determined by the number X of antenna ports of the first DM-RS; wherein, different antennas
  • the first DM-RS of the port uses a different sequence of reference signals. For example, as shown in FIG. 8 , a straight line in which the filling pattern is in the lower left or upper right direction indicates that the RE on which the filling pattern is located is the first CRS, and the straight line in which the filling pattern is laterally longitudinally intersects indicates the RE on which the filling pattern is located.
  • the reference signal is port A and port (A+1), and the padding pattern is an oblique cross line, indicating that the reference signal on the RE where the padding pattern is located is port A and port (A+1) when configuring two ports. When configuring four ports, it is port (A+2) and port (A+3).
  • the first DM-RS occupies the same time-frequency resource, specifically, 4 REs are occupied in each PRB in the resource block; when X is equal to 4, Z takes 2, port A and port (A+1)
  • the first DM-RS occupies the same time-frequency resource, specifically, each of the four PRs in the resource block occupies two of the above four REs, the port (A+2) and the port (A+3)
  • a DM-RS occupies the same time-frequency resource, and specifically, each of the four REs in the resource block occupies the other two REs of the above four REs.
  • the first DM-RS is configured on the first symbol or the first two symbols of the resource block, and the UE receives the first symbol or the first two of the resource block. After the symbol, the channel estimation and the like can be performed through the first DM-RS on the symbol, thereby reducing the delay of the UE demodulating the resource block.
  • the first DM-RS may be a reference signal used by the base station to transmit downlink control channel or data channel demodulation to the UE, or may be used by the UE to transmit to the base station for uplink control channel or data channel demodulation. Reference signal.
  • the first DM-RS is a UE-specific reference signal, and only the reference signal that is scheduled to be identified by the UE that includes the resource block of the first DM-RS, or the UE is configured only by the first DM-RS.
  • the antenna port, the base station transmits the first DM-RS for the UE on the resource block that the UE is scheduled.
  • the first DM-RS is a UE-specific reference signal, and the base station indicates, by signaling, the UE, the first DM-RS. Whether there is and/or indicates the location of the first DM-RS within the resource block.
  • the base station configures the first CRS for the resource block, and the antenna port of the first CRS is a cell-specific antenna port.
  • the base station configures the second CRS for the resource block according to the antenna port of the at least one first CRS.
  • the base station transmits a resource block that carries the first DM-RS.
  • the base station transmits the resource block.
  • the resource block carries only the reference signal.
  • the reference signal includes the first DM-RS, or the reference signal includes the first DM-RS and the first CRS, or the reference signal includes the first The DM-RS, the first CRS, and the second CRS; optionally, the resource block carries other information, such as control information and/or data information, in addition to the reference signal.
  • the resource block carries other information, such as control information and/or data information, in addition to the reference signal.
  • the content of the specific DM-RS is different, for example, the first DM-RS is configured for the resource block, and the step 703 is specifically: the base station transmits the first DM-RS.
  • the step 703 is specifically: the base station transmits the resource block carrying the first DM-RS and the first CRS;
  • the step 703 is specifically: the base station transmits the resource block carrying the first DM-RS, the first CRS, and the second CRS.
  • the embodiment of the present invention designs a dedicated DM-RS on each short TTI transmission resource block for short TTI transmissions of different lengths, so that the base station can use the transmission mode of short TTI transmission based on DMRS demodulation to UE. Communicate.
  • An embodiment of the present invention provides a method for transmitting a reference signal corresponding to Embodiment 1 of the present invention.
  • the method of outputting can be performed by a receiving device corresponding to the base station corresponding to Embodiment 1 of the present invention.
  • FIG. 9 is a schematic diagram of a method for transmitting a reference signal according to an embodiment of the present invention. As shown in FIG. 9 , an embodiment of the present invention provides a method for transmitting a reference signal, which may include the following steps:
  • the UE receives a resource block that is transmitted by the base station and carries the first CRS and the supplementary CRS.
  • the resource block is configured to carry information transmitted between the base station and the UE, where the information includes a data portion and a reference signal portion, and the reference signal portion includes the first CRS and the supplementary CRS,
  • the antenna port of the first CRS is a cell-specific antenna port, and the antenna port of the supplementary CRS is the same as or different from the antenna port of the first CRS.
  • the method for the UE to obtain the antenna port information of the first CRS is the same as the method for the base station in the first embodiment of the present invention to obtain the antenna port information of the first CRS. Let me repeat.
  • the first CRS may be a CRS transmitted on a normal subframe, or may be a CRS transmitted on an MBSFN subframe.
  • the configuration method of the resource block size is the same as the configuration method of the resource block size described in Embodiment 1 of the present invention, and details are not described herein again.
  • the method for the base station to configure the first CRS for the resource block is the same as the method for the base station to configure the first CRS for the resource block in the first embodiment of the present invention, and details are not described herein again.
  • the supplementary CRS may include a second CRS and an third CRS.
  • the antenna port of the second CRS is the same as the antenna port of the first CRS, and the antenna port of the third CRS is different from the antenna port of the second CRS.
  • the supplementary CRS includes only the second CRS, where the determining of the antenna port of the second CRS and the second CRS configuration process are the same as those described in the first step in step 302 of Embodiment 1 of the present invention, and details are not described herein again. .
  • the supplementary CRS includes only the third CRS, where the determining of the antenna port of the third CRS and the third CRS configuration process are the same as the method described in the second step in step 302 of Embodiment 1 of the present invention, and details are not described herein again. .
  • the supplementary CRS includes a second CRS and a third CRS, where the second CRS and the third CRS.
  • the determination of the antenna port and the configuration process of the second CRS and the third CRS are the same as those described in the third step in the step 302 of the embodiment 1 of the present invention, and details are not described herein again.
  • the UE when the supplementary CRS includes at least the third CRS, the UE obtains the antenna port information of the third CRS, and the base station described in Embodiment 1 of the present invention enables the UE to obtain the third CRS.
  • the method of the antenna port information is the same and will not be described here.
  • the method for the UE to determine the power information of the reference signal and the data is the same as the method for the base station described in Embodiment 1 of the present invention to notify the UE of the reference signal and the power control parameter information of the data transmission. I won't go into details here.
  • the UE determines the time domain length and the frequency domain length of the resource block, and the base station described in Embodiment 1 of the present invention causes the UE to determine the time domain length and the frequency domain length of the resource block.
  • the method is the same and will not be described here.
  • the supplementary CRS and the first CRS are reference signals having the same feature, for example, the first CRS and the supplementary CRS do not carry precoding matrix information, or both the first CRS and the supplementary CRS carry precoding matrix information.
  • the first CRS and the second CRS have the same antenna virtualization mode, and the first CRS and the third CRS may have the same antenna virtualization mode, or may have different antenna virtualization modes. the way.
  • the specific virtualization mode process is similar to the process of antenna virtualization in the description of step 302 in Embodiment 1 of FIG. 3, and details are not described herein again.
  • the UE demodulates the data portion of the information carried on the resource block according to the first CRS and the supplementary CRS.
  • the UE may perform at least one of the following operations according to the first CRS and the supplementary CRS: AGC adjustment, time-frequency synchronization, channel characteristic estimation, RRM measurement, CSI measurement, and the like.
  • the data part of the information includes control information and/or data information, which is specifically carried on a physical channel
  • the physical channel includes one or a combination of the following: PDCCH, PDSCH, EPDCCH, PCFICH, PHICH, or Some new standards have the same functions, but different names of channels, such as control channels or data channels introduced in short TTI transmissions.
  • the control information for scheduling the resource blocks may not be carried on the resource blocks.
  • the UE may determine the time domain length of the resource block by demodulating the control information of the resource block or a predefined manner.
  • the UE may jointly supplement the CRS and the first CRS to demodulate information carried on the resource block.
  • the data part of the information does not contain any information, that is, the information carried by the resource block only includes the reference signal part.
  • the UE may perform at least one of the following operations according to the first CRS and the supplementary CRS: AGC adjustment, time-frequency synchronization, channel characteristic estimation, RRM measurement, CSI measurement, and the like.
  • the UE needs to demodulate the PDCCH before determining whether to receive the PDSCH.
  • the UE demodulates the PDCCH using only the first CRS.
  • the UE demodulates the PDCCH using only the third CRS.
  • the UE needs to jointly use the first CRS and the third CRS to demodulate the PDCCH. It can be understood that the UE needs to determine the number of antenna ports of the third CRS or the antenna port number of the third CRS before using the third CRS.
  • the base station notifies the UE of the power control parameter and the number of antenna ports of the first CRS by using the high layer signaling, and the UE determines the number of antenna ports according to the power control parameter and the first CRS.
  • the base station There is a data power ratio on the symbol of the first CRS and a symbol on the symbol without the first CRS, thereby correctly demodulating the information carried on the resource block by using the channel estimation result obtained by the first CRS.
  • the UE receives signaling for determining a power control parameter sent by the base station, where the signaling may be RRC signaling or media access control MAC signaling or physical layer signaling, and the UE according to the signaling Determine the power control information on the resource block.
  • the power control information is specifically a ratio of data power on a symbol having a first CRS and a supplementary CRS and data power on a symbol without a first CRS and a supplementary CRS, and the UE correctly uses the power control information according to the power control information.
  • the channel estimation result obtained by a CRS and a supplementary CRS demodulates information carried on the resource block.
  • the embodiment of the present invention provides a method for transmitting a reference signal corresponding to Embodiment 2 of the present invention, and the illustrated method may be performed by a receiving device corresponding to a base station corresponding to Embodiment 2 of the present invention.
  • FIG. 10 is a schematic diagram of a method for transmitting a reference signal according to an embodiment of the present invention.
  • an embodiment of the present invention provides a method for transmitting a reference signal, which may include the following steps:
  • the UE receives a resource block that is transmitted by the base station and carries the first DM-RS.
  • the resource block is configured to carry information transmitted between the base station and the UE, where the information includes a data portion and a reference signal portion, the reference signal portion includes the first DM-RS, and the antenna port of the first DM-RS is dedicated to the UE. Demodulate the antenna port.
  • the data part of the information includes control information and/or data information, which is specifically carried on a physical channel
  • the physical channel includes one or a combination of the following: PDCCH, PDSCH, EPDCCH, PCFICH, PHICH, or Some new standards have the same functions, but different names of channels, such as control channels or data channels introduced in short TTI transmissions.
  • the control information for scheduling the resource blocks may not be carried on the resource blocks.
  • the UE may determine the time domain length of the resource block by demodulating the control information of the resource block or a predefined manner. The UE may demodulate the information carried on the resource block using the first DM-RS.
  • the data part of the information does not contain any information, that is, the information carried by the resource block only includes the reference signal part.
  • the UE may perform at least one of the following operations according to the first DM-RS: AGC adjustment, time-frequency synchronization, channel characteristic estimation, and the like.
  • the method for the UE to obtain the antenna port information of the first DM-RS is the same as the method for the base station in the second embodiment of the present invention to obtain the antenna port information of the first DM-RS. , will not repeat them here.
  • the UE determines the time domain length and the frequency domain length of the resource block, and the base station described in Embodiment 2 of the present invention causes the UE to determine the time domain length and the frequency domain length of the resource block.
  • the method is the same and will not be described here.
  • the method for the base station to configure the first DM-RS for the resource block is the same as the method for the base station configured in the second embodiment of the present invention to configure the first DM-RS for the resource block, where Let me repeat.
  • the base station may configure the first CRS for the resource block.
  • the method for the base station to configure the first CRS for the resource block is the same as the method for the base station to configure the first CRS for the resource block in the embodiment of the present invention, and details are not described herein again.
  • the base station may configure the first CRS and the second CRS for the resource block.
  • the method for the base station to configure the first CRS and the second CRS for the resource block is the same as the method for the base station to configure the first CRS and the second CRS for the resource block in the second embodiment of the present invention. Narration.
  • the first CRS may be a CRS transmitted on a normal subframe, or may be a CRS transmitted on an MBSFN subframe.
  • the UE demodulates the data portion of the information carried on the resource block according to the first DM-RS.
  • the UE may perform at least one of the following operations according to the first DM-RS: AGC adjustment, time-frequency synchronization, channel characteristic estimation, and the like.
  • the information carried on the resource block includes control information and/or data information
  • the UE may perform demodulation on the information carried on the resource block by using the first DM-RS.
  • the UE when the resource block further carries the first CRS and/or the second CRS, the UE may be configured to perform at least one of the following operations in conjunction with the first CRS and/or the second CRS: AGC adjustment, time-frequency synchronization, and channel Feature estimation, RRM measurement, CSI measurement, etc.
  • FIG. 11 is a block diagram of a base station according to an embodiment of the present invention, as shown in FIG.
  • the embodiment of the present invention provides a base station, which supports short TTI transmission, can serve multiple UEs that support short TTI transmission, and can also serve multiple UEs that do not support short TTI transmission.
  • the base station may include:
  • the first configuration module 1101 is configured to configure a first CRS for the resource block, where the antenna port of the first CRS is a cell-specific antenna port, and the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal part. ;
  • the information about the antenna port can be notified to the UE in a plurality of manners.
  • the specific notification manner is similar to the related content in the description of the step 301 in the embodiment shown in FIG. 3, and details are not described herein again.
  • the data part includes the control information and/or the data information, and the description of the control information and the data information is similar to the related part in the description of the step 301 in the embodiment 1 shown in FIG. 3, and details are not described herein again.
  • the size of the resource block can be configured according to the actual situation.
  • the specific configuration process is similar to the related part in the description of step 301 in the embodiment 1 shown in FIG. 3, and details are not described herein again.
  • the first configuration module 1101 is further configured to supplement the CRS for the resource block configuration, and supplement the CRS day.
  • the line port is the same as or different from the antenna port of the first CRS;
  • the supplementary CRS may include three different situations, that is, the supplementary CRS is the second CRS, the supplementary CRS is the third CRS, and the supplementary CRS is the second CRS and the third CRS, and the second CRS and the first CRS are used. Having the same antenna port, and the antenna port of the third CRS is different from the antenna ports of the first CRS and the second CRS.
  • the first configuration module 1101 may be at least one in the resource block.
  • the antenna port of the first CRS configures the second CRS; when the supplementary CRS is the third CRS, the first configuration module 1101 first determines the time domain length and/or the frequency domain length of the resource block, and determines the third CRS of the resource block.
  • the antenna port is then configured with a third CRS for the antenna port of the at least one third CRS according to the time domain length and/or the frequency domain length; the case where the supplementary CRS includes the second CRS and the third CRS is to combine the two cases.
  • the configuration process of the specific three scenarios is similar to the descriptions of the first scenario, the second scenario, and the third scenario in the description of the step 302 in the embodiment shown in FIG. 3, where the scenario 1 corresponds to the supplementary CRS as the second CRS. Case 2 corresponds to the supplementary CRS as the third CRS, and Case 3 corresponds to the supplementary CRS as the second CRS and the third CRS, and details are not described herein again.
  • the first configuration module 1101 may be further configured to determine a time domain length and a frequency domain length of the resource block, where determining the time domain length of the resource block may include determining that the time domain length of the resource block is M time domains. a symbol, M is an integer not less than 1 and not greater than 14; determining a time domain length of the resource block is N subframes, and N is an integer not less than 1 and not greater than 10; one or two of the two methods are used
  • the determination of the frequency domain length of the resource block may include: determining that the frequency domain length of the resource block is P PRBs or RBGs or REs or REGs, P is an integer not less than 1 and not greater than Q, and Q is a system.
  • the number of PRBs or RBGs or the number of REs or REGs corresponding to the bandwidth The specific determination process of the time domain length and the frequency domain length of the resource block and the determination of the time domain length and the frequency domain length of the resource block in the description of the second case in the description of the step 302 in the embodiment 1 shown in FIG. Similar, it will not be repeated here.
  • the first configuration module 1101 is further configured to: when determining the time domain length of the resource block by determining the time domain length of the resource block as the M time domain symbol, the first configuration module 1101 is further configured to:
  • one RE is configured for each antenna port of each third CRS in the antenna port of the at least one third CRS in each PRB in the resource block;
  • M is an integer of not less than 4 and not more than 7, two REs are configured for each of the antenna ports of the third CRS in each of the PRBs in the resource block;
  • an antenna RE of each third CRS of the antenna ports of the at least one third CRS is configured with 4 REs in each PRB within the resource block.
  • the first configuration module 1101 differently configures the number of REs configured for the antenna ports of each third CRS in the antenna ports of the at least one third CRS in each PRB. .
  • the base station further includes a first transceiver module 1102, configured to transmit a resource block, and the reference signal portion of the information carried by the resource block includes a first CRS and a supplementary CRS.
  • the first configuration module 1101 is used to implement the content involved in the step 301 and the step 302 in the embodiment 1 shown in FIG. 3, and the first transceiver module 1102 is used to implement the steps in the embodiment 1 shown in FIG. The content involved in 303.
  • the first configuration module 1101 first determines the antenna port information of the first CRS, and after the first CRS is configured by the first configuration module 1101, it is further a resource block.
  • the supplementary CRS is configured, and since the supplementary CRS includes three types, namely, the second CRS, the third CRS, and the second CRS and the third CRS, the second CRS is supplemented because the short TTI mode has to maintain a shorter delay.
  • a CRS has poor demodulation performance for certain data.
  • the third CRS is because the UE overhead of supporting 4 antenna ports and DMRS is large. By properly configuring the third CRS, the overhead of the reference signal in each subframe can be reduced.
  • the configured resource block is sent out by the first transceiver module 1102, so that the UE can receive the resource block, and combines the first CRS and the supplementary CRS to solve the data portion of the resource block information. Tune.
  • FIG. 12 is a diagram of an embodiment of a base station according to an embodiment of the present invention.
  • an embodiment of the present invention provides a base station that supports short TTI transmission, can serve multiple UEs that support short TTI transmission, and can also serve multiple UEs that do not support short TTI transmission.
  • a second configuration module 1201 configured to determine a time domain length and/or a frequency domain length of the resource block, where the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal part;
  • the second configuration module 1201 is further configured to determine a time domain length and a frequency domain length of the resource block, where determining the time domain length of the resource block may include determining that the time domain length of the resource block is M time domains. a symbol, M is an integer not less than 1 and not greater than 14; determining a time domain length of the resource block is N subframes, and N is an integer not less than 1 and not greater than 10; one or two of the two methods are used For the joint determination, the determination of the frequency domain length of the resource block may include: determining that the frequency domain length of the resource block is P PRBs or RBGs or REs or REGs, P is an integer not less than 1 and not greater than Q, and Q is a system.
  • the number of PRBs or RBGs or the number of REs or REGs corresponding to the bandwidth The specific determination process of the time domain length and the frequency domain length of the resource block and the determination of the time domain length and the frequency domain length of the resource block in the description of the second case in the description of the step 302 in the embodiment 1 shown in FIG. Similar, it will not be repeated here.
  • the second configuration module 1201 is further configured to configure a first DM-RS for the resource block, where the antenna port of the first DM-RS is a UE-dedicated demodulation antenna port;
  • the second configuration module 1201 may further configure Y REs for each antenna port of the first DM-RS in the antenna ports of the at least one first DM-RS in each PRB in the resource block, where Y is The number of antenna ports that the first DM-RS can support at most, the first DM-RS of different antenna ports uses different reference signal sequences, and the first DM-RSs of different antenna ports occupy the same time-frequency resource.
  • the base station further includes a second transceiver module 1202, configured to transmit a resource block, where the reference signal portion of the information carried by the resource block includes the first DM-RS.
  • the second configuration module 1201 may also configure a first CRS for the resource block configured with the first DM-RS, where the second transceiver module 1202 is specifically configured to transmit a resource block, where the reference signal portion of the resource block includes the first DM.
  • the second configuration module 1201 may further reconfigure the second CRS for the resource block configured with the first DM-RS and the first CRS, and the second transceiver module 1202 is specifically configured to transmit the resource block.
  • the reference signal portion of the resource block includes a first DM-RS, a first CRS, and a second CRS.
  • the configuration process of the specific first CRS and the second CRS is similar to the related configuration process in the description of the step 702 in the embodiment 2 shown in FIG. 7, and details are not described herein again.
  • the short TTI also affects the first CRS, that is, in order to keep a short delay, the demodulation performance of some data portions on the resource block through the demodulation of the first CRS is deteriorated, so it is necessary to
  • the first CRS layout (the layout of the existing CRS) is adjusted, and the second configuration module 1201 may supplement the second CRS in the resource block to improve the demodulation performance, so that the data portion with poor demodulation performance on the resource block can be combined.
  • the first CRS and the second CRS are demodulated. For details, refer to the related part in the description of the step 702 in the embodiment 2 shown in FIG. 7, and details are not described herein again.
  • the second configuration module 1201 is used to implement the content involved in step 701 and step 702 in the embodiment 2 shown in FIG. 7, and the first transceiver module 1202 is configured to implement the steps in the embodiment 2 shown in FIG. The content involved in 703.
  • the resource block is transmitted in the short TTI mode, if the data part on the resource block still adopts the layout of the original DMRS (that is, the existing DMRS layout), there may be some cases where the resource block has no DMRS, so it is required
  • the new DMRS is added to enable the DMRS on all the resource blocks, and the specific arrangement may be multiple, as long as all the resource blocks have the DMRS.
  • the second configuration module 1201 is configured for the resource block.
  • the time domain length and the frequency domain length of the resource block are first determined, and then the first DM-RS is configured according to the time domain length and the frequency domain length of the resource block, so that all the resource blocks are Both have enough DMRS.
  • FIG. 13 is a schematic diagram of an embodiment of the user equipment according to the embodiment of the present invention, as shown in FIG.
  • the embodiment of the present invention provides a user equipment, which may include:
  • the third transceiver module 1301 is configured to receive a resource block that is transmitted by the base station and that carries the first CRS and the supplementary CRS, where the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal part, and
  • the signal portion includes a first CRS and a supplementary CRS, the antenna port of the first CRS is a cell-specific antenna port, and the antenna port supplementing the CRS is the same as or different from the antenna port of the first CRS;
  • the supplementary CRS includes a second CRS and/or a third CRS.
  • the antenna port of the second CRS is the same as the antenna port of the first CRS, and the antenna port of the third CRS is different from the antenna port of the first CRS.
  • the type of the supplementary CRS in the resource block received by the third transceiver module 1301 can be divided into three cases, that is, the supplementary CRS is the second CRS, the supplementary CRS is the third CRS, or the supplementary CRS is the second CRS and
  • the third CRS, the configuration procedure of the CRS of the three scenarios may correspond to the three scenarios for supplementing the CRS in the description of step 302 in Embodiment 1 of FIG.
  • the user equipment further includes a first demodulation module 1302, configured to demodulate a data portion of information carried on the resource block according to the first CRS and the supplemental CRS.
  • the specific demodulation process is similar to the demodulation process of the data part in the description of step 902 in the embodiment shown in FIG. 9, and details are not described herein again.
  • the data part may include control information and data information, and the control information and the data information are similar to the related parts in the description of the step 301 in the embodiment 1 shown in FIG. 3, and details are not described herein again.
  • the user equipment may further include:
  • the first determining module 1303 is configured to determine that the time domain length of the resource block is M time domain symbols, and M is an integer that is not less than 1 and not greater than 14.
  • the time domain length used to determine the resource block is N subframes, and N is an integer not less than 1 and not greater than 10;
  • the first determining module 1303 is further configured to:
  • the frequency domain length of the resource block is determined to be P PRBs or RBGs or REs or REGs, P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth.
  • the first determining module 1303 can determine that the time domain length of the resource block is M time domain symbols, or determine that the time domain length of the resource block is N subframes, or when the two are combined with the resource block.
  • the length of the domain is determined.
  • the specific determination process is similar to the determination of the time domain length and the frequency domain length of the resource block in the description of the second case in the description of the step 302 in the embodiment 1 shown in FIG. Narration.
  • the third transceiver module 1301 is further configured to receive, by the base station, signaling for determining port information and/or power control parameters of an antenna port of the third CRS, where the signaling is RRC signaling or media access control. MAC signaling or physical layer signaling; at this time, the first determining module 1303 further An antenna port and/or power control parameter for determining a third CRS based on signaling.
  • the signaling received by the third transceiver module 1301 may be the same type of signaling or different types of signaling.
  • the signaling of the port information of the antenna port that includes the third CRS may be the same as or different from the signaling of the power control parameter. If the signaling of the same type is used, the third CRS may be separately indicated by independent signaling.
  • the number of antenna ports and the power control parameter of the third CRS may also include the number of antenna ports of the third CRS and the power control parameters of the third CRS in the same signaling.
  • the third transceiver module 1301 is used to implement the content involved in the step 901 in the embodiment 3 shown in FIG. 9.
  • the first demodulation module 1302 is used to implement the step 902 in the embodiment 3 shown in FIG. The content involved.
  • the third transceiver module 1301 after receiving the resource block including the first CRS and the supplementary CRS, the third transceiver module 1301 performs, by the first demodulation module 1302, the data portion of the information of the resource block by using the first CRS and the supplementary CRS.
  • Demodulation since the first CRS and the supplementary CRS are configured by the base station according to the time domain length and the frequency domain length of the resource block, the first CRS and the supplementary CRS can ensure that the data portion in the resource block can be supplemented by the first CRS and CRS demodulation and has better demodulation performance.
  • FIG. 14 is a diagram of an embodiment of a base station according to an embodiment of the present invention, as shown in FIG.
  • the embodiment of the invention provides a user equipment, which may include:
  • the fourth transceiver module 1401 is configured to receive a resource block transmitted by the base station, where the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal part, where the reference signal part includes the first DM-RS,
  • the antenna port of the first DM-RS is a UE dedicated demodulation antenna port;
  • the method for the fourth transceiver module 1401 to obtain the antenna port information of the first DM-RS is similar to the method for the base station in the second embodiment shown in FIG. 7 to obtain the antenna port information of the first DM-RS. Let me repeat.
  • the resource block received by the user equipment has a first CRS in addition to the first DM-RS, and the first CRS is configured by the base station, and the first CRS configuration process and the base station in the second embodiment shown in FIG.
  • the process of configuring the first CRS is similar, and is not described here.
  • the resource block received by the user equipment may include, in addition to the first DM-RS and the first CRS, a second CRS, where the first CRS and the second CRS included in the resource block are configured by the base station, the first CRS and
  • the process of configuring the first CRS and the second CRS for the resource block by the base station in the second embodiment shown in FIG. 7 is similar to that of the second CRS configuration process, and details are not described herein again.
  • the first CRS may be a CRS transmitted on a normal subframe, or may be a CRS transmitted on an MBSFN subframe.
  • the second demodulation module 1402 is configured to demodulate the data portion of the information carried on the resource block according to the first DM-RS.
  • the second demodulation module 1402 demodulates the data portion of the information carried on the resource block according to the first DM-RS, and includes the first DM in the resource block.
  • the second demodulation module 1402 demodulates the data portion of the information carried on the resource block according to the first DM-RS, and performs at least one of the following operations according to the first CRS: AGC adjustment, time-frequency synchronization
  • the second demodulation module 1402 carries the resource on the resource block according to the first DM-RS, when the first DM-RS, the first CRS, and the second CRS are included in the resource block.
  • the data portion of the information is demodulated, and the specific second demodulation module 1402 may perform at least one of the following operations in conjunction with the first CRS and/or the second CRS: AGC adjustment, time-frequency synchronization, channel characteristic estimation, RRM measurement, CSI Measurement, etc.
  • the information carried on the resource block includes control information and/or data information, and the information is specifically carried on a physical channel, where the physical channel includes one or a combination of the following: PDCCH, PDSCH, EPDCCH, PCFICH, PHICH,
  • the second demodulation module 1402 can demodulate the information carried on the resource block in conjunction with the first DM-RS.
  • the user equipment further includes:
  • the second determining module 1403 is configured to determine that the time domain length of the resource block is M time domain symbols, and M is an integer that is not less than 1 and not greater than 14.
  • the time domain length used to determine the resource block is N subframes, and N is an integer not less than 1 and not greater than 10;
  • the second determining module 1403 is further configured to:
  • the frequency domain length of the resource block is determined to be P PRBs or RBGs or REs or REGs, P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or RE numbers or REGs corresponding to the system bandwidth.
  • the second determining module 1403 can determine that the time domain length of the resource block is M time domain symbols, or determine that the time domain length of the resource block is N subframes, or when the two are combined with the resource block.
  • the length of the domain is determined.
  • the specific determination process is similar to the determination of the time domain length and the frequency domain length of the resource block in the description of the second case in the description of the step 702 in the embodiment 2 shown in FIG. Narration.
  • the fourth transceiver module 1401 is used to implement the content involved in the step 1001 in the embodiment 4 shown in FIG. 10
  • the second demodulation module 1402 is used to implement the step 1002 in the embodiment 4 shown in FIG. The content involved.
  • the fourth transceiver module 1401 demodulates the data portion of the information of the resource block by using the first DM-RS by the second demodulation module 1402. Since the first DM-RS is configured by the base station according to the time domain length and the frequency domain length of the resource block, the first DM-RS can ensure that the data portion in the resource block can be demodulated by the first DM-RS, and Has better demodulation performance.
  • FIG. 15 is a diagram of a communication system according to an embodiment of the present invention.
  • the communication system may include:
  • the base station 1501 is configured to configure a first CRS for the resource block, where the antenna port of the first CRS is a cell-specific antenna port, and the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal part;
  • the antenna port of the supplementary CRS is the same as or different from the antenna port of the first CRS;
  • the reference signal portion of the information of the resource block includes a first CRS and a supplementary CRS;
  • a UE 1502 configured to receive a resource block transmitted by the base station
  • It is further configured to demodulate a data portion of information carried on the resource block according to the first CRS and the supplementary CRS.
  • the base station 1501 in this embodiment is the same as the base station in the embodiment 5 shown in FIG. 11, that is, the base station 1501 can implement steps 301 to 303 in the embodiment 1 shown in FIG.
  • the UE 1502 is the same as the UE in the embodiment 7 shown in FIG. 13, that is, the UE can implement the steps 901 and 902 in the embodiment 3 shown in FIG. 9, that is, the base station 1501 also includes the embodiment 5 shown in FIG.
  • the process of the configuration of the resource block and the issuance of the resource block by the base station, the three scenarios included in the supplementary CRS part of the delivered resource block are similar to the three scenarios included in the base station in the embodiment 5 shown in FIG. 11, and the UE 1502 receives the resource.
  • the demodulation process performed by the block and the data portion of the information of the resource block according to the first CRS and the supplementary CRS in the resource block is similar to the received resource block and demodulation process of the UE in Embodiment 7 of FIG. No longer repeat them.
  • FIG. 16 is a communication according to an embodiment of the present invention.
  • An embodiment of the system, as shown in FIG. 16, the communication system can include:
  • the base station 1601 is configured to determine a time domain length and/or a frequency domain length of the resource block, where the resource block is used to carry information transmitted between the base station and the UE, where the information includes a data part and a reference signal part;
  • the antenna port of the first DM-RS is a UE dedicated demodulation antenna port
  • the reference signal portion of the information of the resource block includes a first DM-RS
  • a UE 1602 configured to receive a resource block
  • It is further configured to demodulate a data portion of information carried on the resource block according to the first DM-RS.
  • the base station 1601 in this embodiment is the same as the base station in the embodiment 6 shown in FIG. 12, and the UE 1602 in this embodiment is the same as the UE in the embodiment 8 shown in FIG. 10, step 1001 and step 1002 in the embodiment 4, the base station 1601 can implement steps 701 to 703 in the embodiment 2 shown in FIG. 7, that is, the base station 1601 also includes the embodiment shown in FIG.
  • the process of the configuration of the resource block and the delivery of the resource block by the base station in 6 is the same as the three scenarios included in the base station in the embodiment 6 shown in FIG.
  • the reference signal is the first DM-RS
  • the reference signal is the first DM-RS and the first CRS
  • the reference signal is the first DM-RS, the first CRS, and the second CRS
  • the UE 1602 receives the resource block and according to Demodulation process of the first DM-RS or the first DM-RS and the first CRS in the resource block, or the data portion of the information of the resource block by the first DM-RS, the first CRS, and the second CRS
  • the receiving resource block of the UE in the embodiment 7 shown in FIG. 13 is similar to the demodulation process, and details are not described herein again.
  • FIG. 17 is a diagram of an embodiment of a base station according to an embodiment of the present invention, where the base station 17 may include at least one processor 1701 each connected to a bus. At least one receiver 1702 and at least one transmitter 1703, the base station according to an embodiment of the present invention may have more or less components than those shown in FIG. 17, may combine two or more components, or may have different The components may be configured or arranged in a combination of hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.
  • the processor 1701 can implement the function of the first configuration module 1101 in the embodiment 5 shown in FIG. 11, and the receiver 1702 and the transmitter 1703 can be combined.
  • the processor 1701 can implement the function of the second configuration module 1201 in the embodiment 6 shown in FIG. 12, and the receiver 1702 and the transmitter 1703 can be combined to implement the embodiment shown in FIG. The function of the second transceiver module 1202.
  • FIG. 18 is a diagram of an embodiment of a user equipment according to an embodiment of the present invention, where the user equipment 18 may include at least one processing that is connected to the bus.
  • the base station according to the embodiment of the present invention may have more or less components than those shown in FIG. 18, and may combine two or more components, or There may be different component configurations or arrangements, each component being implemented in hardware, software or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.
  • the processor 1801 can implement the functions of the first demodulation module 1302 and the first determining module 1303 in the embodiment shown in FIG. 13, the receiver 1802.
  • the function of the third transceiver module 1301 in the embodiment shown in FIG. 13 can be implemented in combination with the transmitter 1803.
  • the processor 1801 can implement the functions of the second demodulation module 1402 and the second determining module 1403 in the embodiment shown in FIG. 14 , and the receiver 1802 and the transmitter 1803 can realize the implementation of FIG. 13 .
  • the function of the fourth transceiver module 1401 in the embodiment is shown.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • 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 units described as separate components may or may not be physically separated, 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 purpose 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 above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included 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. .

Abstract

L'invention concerne un procédé de transmission de signal de référence, un équipement utilisateur, une station de base et un système. Le procédé comprend les étapes suivantes dans lesquelles : une station de base configure un premier signal de référence spécifique à une cellule (CRS) pour un bloc de ressources, le premier CRS indiquant un port d'antenne spécifique à la cellule, le bloc de ressources étant configuré pour contenir des informations correspondant à une transmission entre une station de base et un équipement utilisateur (UE), et les informations comprenant une partie données et une partie signal de référence ; la station de base configure un CRS supplémentaire pour le bloc de ressources, le CRS supplémentaire indiquant un port d'antenne identique ou différent du port d'antenne indiqué par le premier CRS ; et la station de base transmet le bloc de ressources contenant les informations comprenant la partie signal de référence comprenant le premier CRS et le CRS supplémentaire. Lorsqu'un intervalle de temps de transmission (TTI) court est adopté, du fait qu'une partie de la partie données dans le bloc de ressources par rapport à une disposition du premier CRS ne peut être démodulée que par extrapolation du CRS, la performance de démodulation est pire. Les modes de réalisation de l'invention peuvent permettre à l'UE d'effectuer une démodulation à l'aide d'un CRS supplémentaire sur un symbole qui ne pouvait être démodulé que par extrapolation du CRS dans l'état de la technique, en fournissant le CRS supplémentaire dans le bloc de ressources, ce qui permet d'améliorer la performance de démodulation.
PCT/CN2015/094007 2015-11-06 2015-11-06 Procédé de transmission de signal de référence, équipement utilisateur, station de base et système WO2017075809A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2015/094007 WO2017075809A1 (fr) 2015-11-06 2015-11-06 Procédé de transmission de signal de référence, équipement utilisateur, station de base et système
CN201580082795.8A CN107925534A (zh) 2015-11-06 2015-11-06 一种参考信号的传输方法、用户设备、基站及系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/094007 WO2017075809A1 (fr) 2015-11-06 2015-11-06 Procédé de transmission de signal de référence, équipement utilisateur, station de base et système

Publications (1)

Publication Number Publication Date
WO2017075809A1 true WO2017075809A1 (fr) 2017-05-11

Family

ID=58661450

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/094007 WO2017075809A1 (fr) 2015-11-06 2015-11-06 Procédé de transmission de signal de référence, équipement utilisateur, station de base et système

Country Status (2)

Country Link
CN (1) CN107925534A (fr)
WO (1) WO2017075809A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113038416A (zh) * 2019-12-25 2021-06-25 维沃移动通信有限公司 一种信道测量参考信号传输方法及终端
CN113225170A (zh) * 2017-09-30 2021-08-06 中兴通讯股份有限公司 一种无线通信方法及装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102082705B1 (ko) 2018-04-27 2020-02-28 엘지전자 주식회사 참조 신호를 송수신하는 방법 및 이를 위한 장치
CN111245557A (zh) * 2018-11-28 2020-06-05 中国移动通信集团浙江有限公司 一种提高lte网络下行效率的方法、装置和设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101931896A (zh) * 2009-06-22 2010-12-29 大唐移动通信设备有限公司 数据发送的方法、系统和设备
CN102124691A (zh) * 2008-08-08 2011-07-13 摩托罗拉移动公司 多天线的公共基准码元的映射和信令
CN103427934A (zh) * 2012-05-16 2013-12-04 中兴通讯股份有限公司 公共参考信号crs信息处理方法及装置
US20130343300A1 (en) * 2012-06-21 2013-12-26 Lg Electronics Inc. Method and apparatus for transmitting and receiving data

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102308545B (zh) * 2009-02-08 2015-06-03 Lg电子株式会社 在无线移动通信系统中发送终端解调的参考信号的方法以及实现该方法的装置
JP2013507033A (ja) * 2009-10-02 2013-02-28 エルジー エレクトロニクス インコーポレイティド ダウンリンク参照信号の転送方法及び装置
US9219994B2 (en) * 2011-11-09 2015-12-22 Lg Electronics Inc. Methods for transmitting and receiving downlink data in MBSFN subframe and apparatuses thereof
WO2013129843A1 (fr) * 2012-02-28 2013-09-06 엘지전자 주식회사 Procédé de transmission de rapport d'informations d'état de canal, équipement utilisateur, procédé de réception de rapport d'informations d'état de canal et station de base
CN104938012B (zh) * 2012-09-28 2018-06-12 瑞典爱立信有限公司 为epdcch降低天线端口干扰的方法及有关的系统、装置和网络
WO2014047915A1 (fr) * 2012-09-29 2014-04-03 华为技术有限公司 Procédé et appareil permettant d'envoyer et de recevoir un signal de référence
US20140153471A1 (en) * 2012-11-30 2014-06-05 Qualcomm Incorporated Allowing unicast subframe structure for embms
CN104685941B (zh) * 2013-09-30 2019-04-19 华为技术有限公司 站间同步的方法及基站

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102124691A (zh) * 2008-08-08 2011-07-13 摩托罗拉移动公司 多天线的公共基准码元的映射和信令
CN101931896A (zh) * 2009-06-22 2010-12-29 大唐移动通信设备有限公司 数据发送的方法、系统和设备
CN103427934A (zh) * 2012-05-16 2013-12-04 中兴通讯股份有限公司 公共参考信号crs信息处理方法及装置
US20130343300A1 (en) * 2012-06-21 2013-12-26 Lg Electronics Inc. Method and apparatus for transmitting and receiving data

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113225170A (zh) * 2017-09-30 2021-08-06 中兴通讯股份有限公司 一种无线通信方法及装置
CN113038416A (zh) * 2019-12-25 2021-06-25 维沃移动通信有限公司 一种信道测量参考信号传输方法及终端
CN113038416B (zh) * 2019-12-25 2023-03-28 维沃移动通信有限公司 一种信道测量参考信号传输方法及终端

Also Published As

Publication number Publication date
CN107925534A (zh) 2018-04-17

Similar Documents

Publication Publication Date Title
CN115333710B (zh) 用于网络协调的下行链路控制信息设计的方法和装置
JP7163277B2 (ja) 無線通信システムにおいて上りリンク送信のための方法及びそのための装置
CN110268786B (zh) 无线蜂窝通信系统中发送控制和数据信息的方法和装置
JP6085351B2 (ja) 制御チャネルリソースを決定するための方法及びユーザ装置
JP6503563B2 (ja) 端末装置、基地局装置および通信方法
US9077569B2 (en) Reference signal for a control channel in wireless communication network
CN105723640B (zh) 用于配置csi测量的方法和布置
CN110741591B (zh) 用于下行链路控制物理结构的方法和设备
WO2017134954A1 (fr) Dispositif terminal, dispositif station de base, et procédé de communication
JP2020507271A (ja) 無線通信システムにおいて下りリンク信号を受信又は送信する方法及びそのための装置
US20120188955A1 (en) Methods and systems for transmitting sfbc signals with csi-rs transmission and related muting in lte-advance systems
WO2018000929A1 (fr) Procédé de configuration de sous-trames et dispositifs associés
JP7032418B2 (ja) データ伝送方法および装置
CN103828282A (zh) 为增强型物理混合自动重复请求指示符信道分配资源的方法和设备
KR20140142727A (ko) Tdd 시스템에서 특수 서브-프레임에서 신호를 송신하는 방법 및 디바이스
KR20160079134A (ko) 강화 물리 다운링크 제어 채널의 매핑
CN107196742B (zh) 集成电路
KR20190005988A (ko) 다운링크 송신들의 구성
JP6848056B2 (ja) 無線通信システムにおいて、複数の送信時間間隔、複数のサブキャリア間隔、又は複数のプロセッシング時間を支援するための方法及びそのための装置
JP6668482B2 (ja) 下りリンク送信方法、基地局及び端末
JPWO2017130500A1 (ja) 端末装置、基地局装置および通信方法
WO2017075809A1 (fr) Procédé de transmission de signal de référence, équipement utilisateur, station de base et système
WO2017167155A1 (fr) Procédé et appareil d'envoi de signal de référence de démodulation (dmrs) de liaison montante
CN115699659A (zh) 多个trp上基于单个coreset的pdcch分集
WO2014015699A1 (fr) Procédé et dispositif permettant l'émission et la réception du signal de référence d'une nouvelle porteuse

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15907651

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15907651

Country of ref document: EP

Kind code of ref document: A1