CN107925534A - A kind of transmission method of reference signal, user equipment, base station and system - Google Patents

Abstract

The present invention provides a reference signal transmission method, user equipment, base station and system. The method may include that the base station configures a first CRS for a 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 base station is The resource block is configured with a supplementary CRS, and the antenna port of the supplementary CRS is the same as or different from that of the first CRS; the base station transmits the resource block, and the reference signal part of the information carried by the resource block includes the first CRS and the supplementary CRS. Under the condition of short TTI transmission, because the first CRS layout can only demodulate some data parts on the resource block through CRS extrapolation, the demodulation performance is poor. The CRS enables the UE to demodulate such symbols demodulated through CRS extrapolation by supplementing the CRS, thereby improving demodulation performance.

Description

A reference signal transmission method, user equipment, base station and system technical field

The present invention relates to the field of LTE communication, in particular to a reference signal transmission method, user equipment, base station and system.

Background technique

Latency in mobile networks is a key performance indicator (Key Performance Indicator, KPI) of the network, which directly affects user experience. The emerging new services (such as Internet of Vehicles services) also put forward higher and higher requirements for delay. For example, some end-to-end services have the following delay requirements:

Event triggering in sports interactive games requires a delay of less than 25ms; communication between cars in autonomous driving (Car-to-car) requires a delay of less than 30ms; remote control The round-trip time (Round-Trip Time, RTT) requirement for delay is less than 50ms; the requirement for delay in smart grid power automation protection is less than 8ms; the requirement for call establishment in public safety is less than 300ms, while the end-to-end (End To End, E2E) media file transmission requires a delay of less than 150ms.

During the evolution of mobile communication standards, efforts are being made to reduce delays. The scheduling interval of the physical layer, which has the most obvious impact on delays in air interface technology, is 10 ms in wideband code division multiple access (WCDMA), to high-speed Packet access (High-Speed Packet Access, HSPA) is shortened to 2ms, and the transmission time interval (Transmission Time Interval, TTI) to long-term evolution (Long Term Evolution, LTE) or long-term evolution enhancement (LTE Advanced, LTE-A) is shortened to 1ms. The service requirement of small delay leads to the introduction of Short-TTI frame structure in the LTE physical layer to further shorten the scheduling interval. For example, the TTI can be shortened from 1 ms to 1 time domain symbol to 0.5 ms. Wherein, the time domain symbol mentioned above may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol in the LTE system.

The duration of 1 subframe (1ms) contains 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 transmit data in the time domain symbol 3 of the uplink 7 Feedback, the base station will receive the feedback on the time domain symbol 11, at this time the The time from data to receiving feedback is 8 time-domain symbols, which is about 0.57ms. Compared with 1ms TTI transmission, the delay is greatly shortened.

However, if the length of the short TTI is only 1 to 2 time-domain symbols, when the CRS demodulation transmission mode is used, in order to reduce the delay, the short TTI transmission can only use the CRS that appears before the scheduled symbol for channel estimation. For some time-domain symbols, such as time-domain symbols 3 and 6, the channel information on the time-domain symbols can only be obtained through CRS extrapolation, which cannot meet the demodulation requirements in high-speed and high-order modulation scenarios.

Contents of the invention

Embodiments of the present invention provide a reference signal transmission method, user equipment, base station and system, which can enable some time-domain symbols with poor performance when using the first CRS for channel estimation to improve channel estimation accuracy through the supplementary CRS, thereby It can improve the demodulation performance of short TTI transmission in high-speed or high-order modulation scenarios.

In view of this, the first aspect of the embodiments of the present invention provides a reference signal transmission method, which may include: first, the base station configures a first CRS for a resource block, the antenna port of the first CRS is a cell-specific antenna port, and the resource block Used to carry the information transmitted between the base station and the UE, the information includes a data part and a reference signal part; where the antenna port of the first CRS refers to the antenna port for transmitting the first CRS, for example, if the antenna port for transmitting the first CRS port 0 and port 1, the base station sends the first CRS through port 0 and port 1, and the UE receives the first CRS through port 0 and port 1.

Secondly, the base station reconfigures the supplementary CRS for the resource block, and the antenna port of the supplementary CRS is the same or different from the antenna port of the first CRS; Layout) can demodulate the data part on the resource block, but because the short TTI mode is adopted, especially when the length of the short TTI is only one to two symbols, in order to reduce the impact of delay, some The data on resource units, such as symbol 3 and symbol 10, can only obtain the channel information on this symbol through extrapolation of CRS, and since the distance from the symbol containing CRS closest to symbol 3 may be three symbols or more, in The demodulation performance in high-speed and high-order modulation scenarios is affected. Therefore, by arranging supplementary CRSs in resource blocks, the UE can demodulate symbols that are demodulated through CRS extrapolation through supplementary CRSs.

Finally, the base station transmits resource blocks. The reference signal part of the information carried by the resource block includes the first CRS and the supplementary CRS. After the UE receives the resource block, the data part of the information carried by the resource block can be replaced by the first CRS carried by the resource block. CRS and complementary CRS demodulation, thereby improving demodulation performance.

With reference to the first aspect, in the first possible implementation of the first aspect, the supplementary CRS may include a second CRS, that is, when the first CRS is insufficient, it can supplement a resource block with the same CRS as the first CRS. The second CRS base station of the antenna port configures the supplementary CRS for the resource block including:

The base station configures the second CRS for at least one antenna port of the first CRS in the resource block. For example, the antenna ports of the first CRS include port 0 and port 1. When configuring the second CRS, it can be configured only on port 0 without considering port 1, or only configured on port 1 without considering port 0. Or configure on both ports.

It can be seen that as a supplement when the first CRS is insufficient; in this case, only the antenna port of the first CRS is required as the transmission port for transmitting the first CRS and the second CRS, usually because the first CRS has a fixed method Arranged in the resource block, only a small amount of second CRS needs to be supplemented to realize that the data on the resource block that needs to be demodulated through CRS extrapolation can be jointly demodulated by the first CRS and the second CRS.

With reference to the first possible implementation of the first aspect, in the second possible implementation of the first aspect, 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 a different antenna port from the antenna port of the first CRS. After the second CRS is supplemented in the resource block, in some cases, the UE has more antenna ports than the antenna ports of the first CRS. At this time, the supplementary CRS may include a third CRS, and the third CRS may be the UE A dedicated reference signal, or it can be a cell-specific reference signal, or it can be a certain group in the cell, such as a reference signal that can be identified by all UEs that support short TTIs, and the third CRS is transmitted through an antenna port different from the first CRS. CRS, thereby satisfying the demodulation of such UEs.

Configuring the supplementary CRS for the resource block by the base station also includes:

The base station determines the time domain length and/or the frequency domain length of the resource block;

The base station determines the third CRS antenna port of the resource block;

The base station configures the third CRS for at least one third CRS antenna port according to the length of the time domain and/or the length of the frequency domain in the resource block.

When such a third CRS is configured in a resource block, the time domain length and/or frequency domain of the resource block need to be considered Length, that is, it is necessary to know how many time domain symbols the time domain length of the resource block is, how many PRBs the frequency domain length is, and each PRB includes 12 subcarriers, and then configure corresponding to the antenna port of the third CRS.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the supplementary CRS includes a third CRS, the supplementary CRS antenna port is the third CRS antenna port, and the third CRS antenna port and the first CRS antenna port are different antenna ports;

The base station configures the supplementary CRS transmitted through the supplementary CRS antenna port for the resource block, including:

The base station determines the time domain length and/or the frequency domain length of the resource block;

The base station determines the CRS antenna port of the resource block, and the CRS antenna port includes the first CRS antenna port and the third CRS antenna port;

The base station configures the third CRS for at least one third CRS antenna port in the resource block. For specific reasons why the third CRS needs to be configured and configuration requirements, refer to the second possible implementation manner of the first aspect.

With reference to the second possible implementation of the first aspect or the third possible implementation of the first aspect, in a fourth possible implementation of the first aspect, the base station determines the time-domain length and/or In the frequency domain length, the base station determines the time domain length in at least the following two ways;

One is that 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 other is that the base station determines that the time domain length of the resource block is N subframes, where N is an integer not less than 1 and not greater than 10; the length of the resource block is divided according to the integer multiple of the subframe length.

The base station determines the frequency domain length of the resource block at least in the following manner:

The base station determines the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth. That is, the frequency domain length can be an integer multiple of PRB, RBG, RE or REG, and the specific division can be defined in advance.

With reference to the fourth possible implementation of the first aspect, in the fifth possible implementation of the first aspect, the base station determines that the time-domain length of the resource block is M time-domain symbols, when M is not less than 1 and is not When an integer greater than 3, the base station configures the third CRS for at least one third CRS antenna port in the resource block, including:

The base station configures one RE for each third CRS antenna port in at least one third CRS antenna port in each PRB in the resource block;

or,

When M is an integer not less than 4 and not greater than 7, the base station configures a third CRS for at least one third CRS antenna port in the resource block, including:

The base station configures 2 REs for each third CRS antenna port in at least one third CRS antenna port in each PRB in the resource block;

or,

When M is an integer not less than 8 and not greater than 14, the base station configures a third CRS for at least one third CRS antenna port in the resource block, including:

The base station configures 4 REs for each antenna port of the third CRS among the antenna ports of at least one third CRS in each PRB in the resource block.

It can be seen that when the number of time-domain symbols is used as the time-domain length of the resource block, according to the difference in the time-domain length, for each third CRS in the antenna port of at least one third CRS in each PRB Antenna ports are configured with different numbers of REs.

In combination with the second possible implementation of the first aspect or the third possible implementation of the first aspect or the fourth possible implementation of the first aspect or the fifth possible implementation of the first aspect, in In a sixth possible implementation of the first aspect, the method further includes:

The base station sends the number of antenna ports and/or power control parameters of the third CRS through signaling, where the signaling is radio resource control RRC signaling or medium access control MAC signaling or physical layer signaling.

It should be noted that the number of antenna ports of the third CRS to be sent and the power control parameters of the third CRS can be sent by the same type of signaling or different types of signaling. If the same type of signaling is used for sending, independent The signaling respectively indicates the number of antenna ports of the third CRS and the power control parameters 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.

It can be seen that the signaling can be in many different ways, for example, radio resource control RRC signaling or medium access control MAC signaling or physical layer signaling.

The second aspect of the embodiment of the present invention also provides a reference signal transmission method, which may include: the base station determines the time domain length and/or the frequency domain length of the resource block, and the resource block is used to carry the information transmitted between the base station and the UE, so The above information includes a data part and a reference signal part;

The base station configures the first DM-RS transmitted through the first DM-RS antenna port for the resource block, and the parameter The test signal part includes the first DM-RS;

The base station transmits the resource block, and the reference signal part of the information carried on the resource block includes the first DM-RS.

By configuring the first DM-RS in this manner, it is possible to perform DMRS transmission under the condition of short TTI transmission.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the base station determines the time-domain length and/or the frequency-domain length of the resource block, and the base station determines 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;

and / or,

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 the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth. That is, the frequency domain length can be an integer multiple of PRB, RBG, RE or REG, and the specific division can be defined in advance.

The base station determines the time-domain length and the frequency-domain length of the resource block, which is similar to the third possible implementation manner of the first aspect.

In combination with the first possible implementation of the second aspect, in the second possible implementation of the second aspect,

Configuring the first DM-RS for the resource block by the base station includes:

The base station configures Y REs for each antenna port of the first DM-RS in at least one antenna port of the first DM-RS in each PRB in the resource block, where Y is the first The maximum number of antenna ports that a DM-RS can support, the first DM-RSs of different antenna ports use different reference signal sequences, and the first DM-RSs of different antenna ports occupy the same time-frequency resources. In combination with the second aspect or the first possible implementation of the second aspect or the second possible implementation of the second aspect, in the third possible implementation of the second aspect, the method further includes:

The base station configures a first CRS for the resource block, and the antenna port of the first CRS is a cell-specific antenna end 口, the reference signal part includes the first CRS;

The base station transmits the resource block, and the reference signal part of the resource block includes the first DM-RS includes:

The base station transmits the resource block, and the reference signal part of the resource block includes the first DM-RS and the first CRS.

It can be seen that, in some cases, the first DM-RS and the first CRS coexist, that is, for data in one resource block, the first DM-RS and the first CRS are required for demodulation.

In combination with the third possible implementation of the second aspect, in the fourth possible implementation of the second aspect, the method further includes:

The base station configures the second CRS for the resource block according to the antenna port of at least one first CRS;

The base station transmits a resource block, and the reference signal part of the resource block includes the first DM-RS and the first CRS include:

The base station transmits the resource block, and the reference signal part of the resource block includes the first DM-RS, the first CRS and the second CRS.

In some cases, the layout of the first CRS results in poor demodulation performance of the data that should be demodulated by the first CRS on some resource blocks. Therefore, it is necessary to additionally supplement the second CRS transmitted by the antenna port using the first CRS. The number of ports of the second CRS may be the same as that of the first CRS, or may be less than the number of ports of the first CRS.

The third aspect of the embodiment of the present invention also provides a reference signal transmission method, the method may include: the UE receives the resource block transmitted by the base station, wherein the resource block is used to carry the information transmitted between the base station and the UE, and the information includes a data part and a reference signal part, the reference signal part 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 of the supplementary CRS is the same as or different from the antenna port of the first CRS;

The UE demodulates the data part of the information carried on the resource block according to the first CRS and the supplementary CRS.

It can be seen that corresponding to the resource block configured by the base station in the first aspect to carry the first CRS and the supplementary CRS, after receiving the resource block, the UE will use the first CRS and the supplementary CRS to compare the data of the information on the resource block Partially demodulated.

With reference to the third aspect, in a first possible implementation manner 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 that of the first CRS, and the third CRS The antenna port of the CRS is different from the antenna port of the first CRS.

It can be seen that 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. In these three cases, the second CRS is similar to the first CRS, and can be The data part of the corresponding information is demodulated, and the third CRS needs to cooperate with the first CRS to demodulate the data part of the corresponding information.

In combination with the third aspect or the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect, the method further includes,

The UE determines the time domain length and/or the frequency domain length of the resource block, where the UE determines 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;

and / or,

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 including:

The UE determines that the frequency domain length of the resource block is P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth.

It can be seen that the determination of the length in the time domain and the length in the frequency domain of the resource block are similar to the fourth possible implementation of the first aspect and the first possible implementation of the second aspect.

In combination with the first possible implementation of the third aspect or the second possible implementation of the third aspect, in the third possible implementation of the third aspect, the method further includes:

The UE receives signaling sent by the base station for determining port information and/or power control parameters of the antenna port of the third CRS, where the signaling is radio resource control RRC signaling or medium access control MAC signaling or physical layer signaling;

The UE determines the antenna port and/or power control parameter of the third CRS according to the signaling.

The UE obtains the port information and/or power control parameters of the antenna ports of the third CRS by receiving signaling from the base station, and can use these port information and power control parameters to demodulate the data part of the information in the resource block.

The fourth aspect of the present invention also provides a reference signal transmission method, the method may include:

The UE receives the resource block transmitted by the base station, wherein 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, the antenna of the first DM-RS The port is a UE dedicated demodulation antenna port;

The UE demodulates the data part of the information carried on the resource block according to the first DM-RS.

It can be seen that corresponding to the resource block carrying the first DM-RS configured by the base station in the second aspect, after receiving the resource block, the UE will perform the data part of the information on the resource block through the first DM-RS demodulation.

In combination with the fourth aspect, in the first possible implementation manner of the fourth aspect, the method further includes,

The UE determines the time domain length and/or the frequency domain length of the resource block, where the UE determines 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;

and / or,

The base station determines that the time domain length of the resource block is N subframes, and the N is an integer not less than 1 and not greater than 10;

The UE determines the frequency domain length of the resource block including:

The UE determines that the frequency domain length of the resource block is P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth.

It can be seen that the determination of the length in the time domain and the length in the frequency domain of the resource block are similar to the second possible implementation manner of the third aspect.

In combination with the fourth aspect or the first possible implementation manner of the fourth aspect, in the second possible implementation manner of the fourth aspect, the method further includes:

The reference signal part also includes a first CRS, and the resource block also carries the first CRS;

Demodulating the data part of the information carried on the resource block by the UE according to the first DM-RS includes:

The UE demodulates the data part of the information carried on the resource block according to the first DM-RS and the first CRS.

It can be seen that, corresponding to the resource block carrying the first DM-RS and the first CRS configured in the third possible implementation manner of the second aspect, the UE uses the first DM-RS and the first CRS for the resource block The data portion of the information on the demodulation.

In combination with the first possible implementation of the fourth aspect or the second possible implementation of the fourth aspect, in the third possible implementation of the fourth aspect, the method further includes:

The reference signal part also includes a first CRS and a second CRS, and the resource block also carries the first CRS and the second CRS;

Demodulating the information carried on the resource block by the UE according to the first DM-RS includes:

The UE demodulates the data part of the information carried on the resource block according to the first DM-RS, the first CRS and the second CRS.

It can be seen that, corresponding to the resource block configured in the fourth possible implementation manner of the second aspect that bears the first DM-RS, the first CRS, and the second CRS, the UE uses the first DM-RS, the first CRS, and the second CRS The second CRS demodulates the data part of the information on the resource block.

The fifth aspect of the embodiment of the present invention also provides a base station, which may include:

The first configuration module is configured to configure 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 first configuration module is also used to configure a supplementary CRS for the resource block, and 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 resource blocks, and the reference signal part of the information carried by the resource blocks includes the first CRS and the supplementary CRS.

It can be understood that the base station can implement the reference signal transmission method provided in the first aspect.

With reference to the fifth aspect, in a first possible implementation manner of the fifth 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 for:

The second CRS is configured in the resource block for at least one antenna port of the first CRS.

It can be understood that the first configuration module in this implementation is used to implement the method involved in the first possible implementation of the first aspect.

With reference to the first possible implementation of the fifth aspect, in the second possible implementation of the fifth aspect, the supplementary CRS further includes a third CRS, the antenna port of the supplementary CRS is the 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 for:

determining the time domain length and/or the frequency domain length of the resource block;

determining the antenna port of the third CRS of the resource block;

Configure the third CRS for the antenna port of at least one third CRS according to the length of the time domain and/or the length of the frequency domain in the resource block.

It can be understood that the first configuration module in this implementation manner can implement the method involved in the second possible implementation manner of the first aspect.

With reference to the fifth aspect, in a third possible implementation manner of the fifth aspect, the supplementary CRS includes a third CRS, the antenna port of the supplementary CRS is the antenna port of the third CRS, and the antenna port of the third CRS is the same as that of the first CRS. The antenna ports are not the same;

The first configuration module is specifically used for:

determining the time domain length and/or the frequency domain length of the resource block;

determining the antenna port of the third CRS of the resource block;

Configure the third CRS for the antenna port of at least one third CRS according to the length of the time domain and/or the length of the frequency domain in the resource block.

It can be understood that the first configuration module in this implementation manner can implement the method involved in the third possible implementation manner of the first aspect.

In combination with the second possible implementation of the fifth aspect or the third possible implementation of the fifth aspect, in the fourth possible implementation of the fifth aspect, the first configuration module is specifically configured to:

Determine the time-domain length of the resource block as M time-domain symbols, where M is an integer not less than 1 and not greater than 14;

and / or,

Determine that the time domain length of the resource block is N subframes, where N is an integer not less than 1 and not greater than 10;

The first configuration module is also specifically used for:

Determine the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth.

It can be understood that the first configuration module in this implementation manner can implement the method involved in the fourth possible implementation manner of the first aspect.

In combination with the fourth possible implementation of the fifth aspect, in the fifth possible implementation of the fifth aspect, the time-domain length of the resource block is M time-domain symbols, and the first configuration module is specifically used for:

When M is an integer not less than 1 and not greater than 3, configure one RE for each antenna port of the third CRS among the antenna ports of at least one third CRS in each PRB in the resource block;

or,

When M is an integer not less than 4 and not greater than 7, configure 2 REs for each antenna port of at least one third CRS antenna port in each PRB in the resource block;

or,

When M is an integer not less than 8 and not more than 14, configure 4 REs for each antenna port of at least one third CRS antenna port in each PRB in the resource block.

It can be understood that the first configuration module in this implementation manner can implement the method involved in the fifth possible implementation manner of the first aspect.

In combination with the second possible implementation of the fifth aspect or the third possible implementation of the fifth aspect or the fourth possible implementation of the fifth aspect or the fifth possible implementation of the fifth aspect, in In a sixth possible implementation of the fifth aspect, the first transceiver module is also used for:

The port information and/or power control parameters used to determine the antenna port of the third CRS are sent by signaling, where the signaling is radio resource control RRC signaling or medium access control MAC signaling or physical layer signaling.

It can be understood that the first transceiver module in this 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 also provides a base station, which may include:

The second configuration module is configured to determine the time domain length and/or the frequency domain length of the resource block, the resource block is used to carry the information transmitted between the base station and the UE, and the information includes a data part and a reference signal part;

The second configuration module is also used to configure the first DM-RS for the resource block, and the antenna port of the first DM-RS is a UE-dedicated demodulation antenna port;

The second transceiver module is configured to transmit resource blocks, and the reference signal part of the information carried by the resource blocks includes the first DM-RS.

It can be understood that the base station can implement the reference signal transmission method provided in the second aspect.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the second configuration module has body for:

Determine the time-domain length of the resource block as M time-domain symbols, where M is an integer not less than 1 and not greater than 14;

and / or,

Determine that the time domain length of the resource block is N subframes, where N is an integer not less than 1 and not greater than 10;

The second configuration module is also specifically used for:

Determine the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth.

It can be understood that the second configuration module can implement the method involved in the first possible implementation manner of the second aspect.

With reference to the first possible implementation of the sixth aspect, in the second possible implementation of the sixth aspect, the second configuration module is specifically configured to:

In each PRB in the resource block, Y REs are configured for each antenna port of the first DM-RS in at least one antenna port of the first DM-RS, where Y is the maximum number of REs supported by the first DM-RS The number of antenna ports, the first DM-RSs of different antenna ports use different reference signal sequences, and the first DM-RSs of different antenna ports occupy the same time-frequency resources.

It can be understood that the second configuration module can implement the method involved in the second possible implementation manner of the second aspect.

In combination with the sixth aspect or the first possible implementation of the sixth aspect or the second possible implementation of the sixth aspect, in the third possible implementation of the sixth aspect, the second configuration module is further used to :

Configuring a first CRS for the resource block, where the antenna port of the first CRS is a cell-specific antenna port;

The second transceiver module is specifically used for:

The resource block is transmitted, and the reference signal part of the resource block includes the first DM-RS and the first CRS.

It can be understood that the second configuration module can implement the method involved in the third possible implementation manner of the second aspect.

With reference to the third possible implementation of the sixth aspect, in the fourth possible implementation of the sixth aspect, the second configuration module is further used for:

configuring the second CRS for the resource block according to the antenna port of at least one first CRS;

The second transceiver module is specifically used for:

The resource block is transmitted, and the reference signal part of the resource block includes the first DM-RS, the first CRS and the second CRS.

It can be understood that the second configuration module can implement the method involved in the fourth possible implementation manner of the second aspect.

The seventh aspect of the present invention also provides a user equipment, which may include: a third transceiver module, configured to receive a resource block transmitted by a base station and carrying a first CRS and a supplementary CRS, wherein the resource block is used to carry a CRS between the base station and the UE. The transmitted information includes a data part and a reference signal part, and the reference signal part 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 of the supplementary CRS is the same as the antenna port of the first CRS or different;

The first demodulation module is configured to demodulate the data part of the information carried on the resource block according to the first CRS and the supplementary CRS.

It can be understood that the user equipment can implement the reference signal transmission method of the third aspect.

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the supplementary CRS includes a second CRS and/or a third CRS, the antenna port of the second CRS is the same as that of the first CRS, and the third CRS The antenna port of the CRS is different from the antenna port of the first CRS.

With reference to the seventh aspect or the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, the user equipment further includes:

The first determining module is configured to determine 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;

and / or,

The length of the time domain 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 determination module is also used to:

Determine the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth.

It can be understood that the first determination module can implement the second possible implementation manner of the third aspect methods involved.

In combination with the first possible implementation of the seventh aspect or the second possible implementation of the seventh aspect, in a third possible implementation of the seventh aspect, the third transceiver module is further used for:

receiving signaling sent by the base station for determining port information and/or power control parameters of the antenna port of the third CRS, where the signaling is radio resource control RRC signaling or medium access control MAC signaling or physical layer signaling;

The first determination module is also used to:

Determine the antenna port and/or power control parameter of the third CRS according to the signaling.

It can be understood that the third transceiving module and the first determining module in this implementation manner can implement the method involved in the third possible implementation manner of the third aspect.

The eighth aspect of the present invention also provides a user equipment, which may include: a fourth transceiver module, configured to receive resource blocks transmitted by the base station, wherein the resource blocks are used to carry information transmitted between the base station and the UE, and the information includes a data part and A reference signal part, where the reference signal part includes a first DM-RS, and the antenna port of the first DM-RS is a UE-dedicated demodulation antenna port;

The second demodulation module is configured to demodulate the data part of the information carried on the resource block according to the first DM-RS.

It can be understood that the user equipment can implement the reference signal transmission method in the fourth aspect.

With reference to the eighth aspect, in a first possible implementation manner of the eighth aspect, the user equipment further includes:

The second determination module is used to determine 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;

and / or,

The length of the time domain 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 determination module is also used to:

Determine the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth.

It can be understood that the second determination module in this implementation manner can implement the method involved in the first possible implementation manner of the fourth aspect.

With reference to the eighth aspect or the first possible implementation of the eighth aspect, in the second possible implementation of the eighth aspect, the reference signal part further includes a first CRS, and the resource block also carries the first CRS;

The second demodulation module is specifically used for:

Demodulate the data part of the information carried on the resource block according to the first DM-RS and the first CRS.

It can be understood that the second demodulation module in this implementation manner can implement the method involved in the second possible implementation manner of the fourth aspect.

With reference to the eighth aspect or the first possible implementation of the eighth aspect, in the second possible implementation of the eighth aspect, the reference signal part further includes the first CRS and the second CRS, and the resource block also carries the first CRS a CRS and a second CRS;

The second demodulation module is specifically used for:

The data part of the information carried on the resource block is demodulated according to the first DM-RS, the first CRS and the second CRS.

It can be understood that the second demodulation module in this implementation manner can implement the method involved in the third possible implementation manner of the fourth aspect.

The ninth aspect of the present invention also provides a communication system, which may include:

The base station is configured to configure 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;

It is also used to configure a supplementary CRS for the resource block, and the antenna port of the supplementary CRS is the same as or different from the antenna port of the first CRS;

It is also used to transmit resource blocks, and the reference signal part of the resource block information includes the first CRS and the supplementary CRS;

UE, configured to receive resource blocks transmitted by the base station;

It is also used to demodulate the data part of the information carried on the resource block according to the first CRS and the supplementary CRS.

It can be understood that the base station in the system may use the base station involved in the fifth aspect, and the UE in the system may use the user equipment involved in the seventh aspect.

The tenth aspect of the present invention also provides a communication system, which may include:

The base station is used to determine the time domain length and/or the frequency domain length of the resource block, 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;

It is also used to configure the first DM-RS for the resource block, and the antenna port of the first DM-RS is a UE-dedicated demodulation antenna port;

It is also used to transmit resource blocks, and the reference signal part of the resource block information includes the first DM-RS;

UE, configured to receive resource blocks;

It is also used to demodulate the data part of the information carried on the resource block according to the first DM-RS.

It can be understood that the base station in the system may use the base station mentioned in the sixth aspect, and the UE in the system may use the user equipment mentioned in the eighth aspect.

It can be seen from the above technical solutions that the embodiment of the present invention has the following advantages: in the embodiment of the present invention, when the resource blocks are the first CRS and the supplementary CRS, the supplementary CRS includes three types, namely the second CRS, the third CRS and the second CRS. The second CRS and the third CRS, supplementing the second CRS is because the short TTI mode makes the demodulation performance of the first CRS poor for some data, and adding the second CRS can enable the demodulation performance of the data with poor performance through the first CRS. Combine the first CRS and the second CRS for demodulation. The third CRS is because the UE supporting 4 antenna ports and DMRS will have a large overhead. By rationally configuring the first CRS with a small number of antenna ports and supplementary configuration of new antenna ports The third CRS can reduce the overhead of the reference signal in each subframe. In addition, the embodiment of the present invention is also designed to address the situation that the number of DMRS in the short TTI mode is insufficient, by first determining the time domain length and frequency of the resource block. domain length, and then configure the first DM-RS correspondingly according to the time domain length and frequency domain length of the resource blocks, so that there are enough DMRSs in all the resource blocks.

Description of drawings

Fig. 1a is the round-trip time delay diagram of OFDM symbol data transmission in the prior art LTE system;

FIG. 1b is a schematic diagram of interaction between a cell base station and a UE in an LTE system in the prior art;

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 reference signal transmission method according to an embodiment of the present invention;

FIG. 4a is another embodiment diagram of the reference signal transmission method of the embodiment of the present invention;

FIG. 4b is a diagram of another embodiment of the reference signal transmission method of the embodiment of the present invention;

FIG. 4c is a diagram of another embodiment of a reference signal transmission method according to an embodiment of the present invention;

FIG. 4d is a diagram of another embodiment of a reference signal transmission method according to an embodiment of the present invention;

FIG. 4e is a diagram of another embodiment of a reference signal transmission method according to an embodiment of the present invention;

FIG. 4f is a diagram of another embodiment of a reference signal transmission method according to an embodiment of the present invention;

FIG. 4g is a diagram of another embodiment of a reference signal transmission method 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 another embodiment diagram of reference signal distribution in the signal transmission method of the embodiment of the present invention;

FIG. 7 is a diagram of an embodiment of a reference signal transmission method according to an embodiment of the present invention;

FIG. 8 is a diagram of an embodiment of a reference signal transmission method according to an embodiment of the present invention;

FIG. 9 is a diagram of an embodiment of a reference signal transmission method according to an embodiment of the present invention;

FIG. 10 is a diagram of an embodiment of a reference signal transmission method according to an embodiment of the present invention;

FIG. 11 is a diagram of an embodiment of a base station according to an embodiment of the present invention;

FIG. 12 is a diagram of 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;

Fig. 15 is an embodiment diagram of the communication system of the embodiment of the present invention;

Fig. 16 is an embodiment diagram of the communication system of the embodiment of the present invention;

FIG. 17 is a diagram of 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.

Detailed ways

An embodiment of the present invention provides a reference signal transmission method, which is used to enable some time-domain symbols with poor performance when using the first CRS for channel estimation to improve the accuracy of channel estimation through the supplementary CRS, so that the channel estimation accuracy can be improved in high-speed or high-order Improve the demodulation performance of short TTI transmission in modulation scenarios.

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments.

Each will be described in detail below.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily describe specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or modules is not necessarily limited to the expressly listed Instead, other steps or modules not explicitly listed or inherent to the process, method, product or apparatus may be included.

During the evolution of mobile communication standards, efforts are being made to reduce delays. In terms of air interface technology, the scheduling interval of the physical layer, which has the most obvious impact on delays, is 10 milliseconds (milliseconds) in Wideband Code Division Multiple Access (WCDMA). ms), shortened to 2ms for High-Speed Packet Access (HSPA), and shortened to 1ms for Long Term Evolution (LTE). The service requirement of small delay leads to the introduction of short transmission time interval (Transmission Time Interval, TTI) in the LTE physical layer to further shorten the scheduling interval, that is, the TTI can be shortened from the normal 1ms to an integer number of symbols less than 1ms. Wherein, the symbol mentioned above may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol in the LTE system, and may also be called a time domain symbol.

The short TTI length of both uplink and downlink is one time domain symbol as an example. As shown in Figure 1a, it is a round-trip time (Round-Trip Time, RTT) delay diagram of one OFDM symbol data transmission. Based on the Hybrid Automatic Repeat Request (HARQ) technology, if the base station transmits data to the user equipment in OFDM symbol 3, if the user equipment correctly demodulates and decodes the received data, it sends data to the base station in OFDM symbol 7 Feedback confirmation character (Acknowledgment, ACK), if the user equipment does not correctly demodulate and decode the received data, it will feed back a negative character (Negative Acknowledgment, NACK) to the base station in OFDM symbol 7, and the base station will confirm receipt in symbol 11 to ACK/NACK. Therefore, when data transmission is performed with 1-symbol TTI, the RTT of data transmission is 8 symbols, which is about 576 microseconds. Compared with the RTT of 8ms required for 1ms TTI transmission, the delay is greatly shortened.

In the normal 1ms scheduling, the transmission mode based on CRS and DMRS demodulation can be supported. However, when using the transmission mode based on CRS demodulation to perform short TTI transmission to the UE, in order to reduce the delay, the UE can only use the scheduled short TTI and the previous CRS to 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 For symbol 3, OFDM symbol 10, etc., the channel information on this symbol can only be obtained through CRS extrapolation, and the time distance of the nearest symbol containing CRS may be 3 symbols, for high-speed, high-order modulation The demodulation performance in the scene is affected, therefore, it is necessary to supplement the CRS to improve the demodulation performance of the short TTI. In addition, since the current demodulation reference signal is designed based on 1ms TTI, if the short TTI also needs to support the transmission mode based on DMRS demodulation, the DMRS needs to be redesigned for each scheduling unit of the short TTI. If there are both UEs in the system that support CRS demodulation based on 4 antenna ports and UEs that support DMRS demodulation based transmission mode, considering the need to configure CRS and additional DMRS for 4 antenna ports at the same time, each The reference signal overhead of a subframe will be very large, therefore, it is necessary to reasonably control the overhead of the supplementary CRS. Therefore, in order to solve the above-mentioned CRS and additional DMRS configured with 4 antenna ports at the same time, the reference signal overhead of each subframe will be very large, and when using the short TTI scheduling of the transmission mode of DMRS demodulation, each scheduling unit needs to have There are two problems in DMRS, and it is necessary to redesign the reference signal when there is a short TTI transmission in the system.

The following is a technical application scenario of the embodiment of the present invention: Please refer to Fig. 1b, Fig. 1b is a schematic diagram of the interaction between the cell base station and the UE in the prior art LTE system; UE102 and UE103 communicating; among them, cell base station 101 is a base station of the LTE system, UE102 and UE103 are UEs under the corresponding LTE system, cell base station 101 and UE102 are devices that support short TTI transmission, and UE103 does not support short TTI transmission device of. Cell base station 101 can use short TTI or normal 1ms TTI to communicate with UE102; cell base station 101 can use normal 1ms TTI to communicate with UE103.

It can be understood that the technical solutions of the embodiments of the present invention can be applied to LTE or LTE-A systems, and can also be applied to other communication systems that need to increase the density of reference signals.

It can be understood that 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 (Cyclic Prefix, CP) part and an information segment part, wherein the information segment part includes the information segment of an 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 an OFDM symbol in the LTE or LTE-A system, or a symbol of other types of communication, which is not limited in the present invention.

It can be understood that in the LTE or LTE-A system, from the time dimension, the time length of a radio frame is 10ms, the time length of a subframe is 1ms, and a radio frame contains 10 subframes. frame. Specifically, there are two subframe formats: one is the Normal Cyclic Prefix (NCP) subframe format, and one NCP subframe includes 14 OFDM symbols or 2 time slots; the OFDM symbols are numbered from 0 to 13, and the first OFDM symbols No. 0 to No. 6 are odd-numbered time slots, and No. 7 to No. 13 OFDM symbols are even-numbered time slots. The other is the extended cyclic prefix (Extended Cyclic Prefix, ECP) subframe format. An ECP subframe includes 12 OFDM symbols or 2 time slots; the OFDM symbols are numbered from 0 to 11, No. 0 to No. 5 The OFDM symbols are odd time slots, and the 6th to 11th OFDM symbols are even time slots.

From the perspective of the frequency dimension, the smallest unit is a subcarrier. From the perspective of time-frequency two-dimensional joint, for the resources used by an antenna port for transmission, the smallest unit is a Resource Element (RE). One RE contains one OFDM symbol in the time domain and one subcarrier in the frequency domain. A resource element group (Resource-Element Group, REG) may contain an integer number of REs, for example, a REG may contain 4 or 16 REs. A physical resource block (Physical Resource Block, PRB) includes a time slot in the time domain and 12 subcarriers in the frequency domain; a subframe includes a PRB pair (PRB pair). A resource block group (Resource Block Group, RBG) may include an integer number of PRBs, for example, an RBG may include 1, 2, 3, 4 or other integer number of PRBs.

It can be understood that in short TTI transmission, the time domain length of resource blocks can be represented by the number of symbols, and the frequency domain length of resource blocks can be represented by the number of PRBs or RBGs or subcarriers or REs or REGs. The system bandwidth may 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. For example, the 10M system bandwidth can be represented by 50 PRBs or 600 subcarriers or 600 REs, or when one REG includes 4 REs, the 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. For example, assuming that the system bandwidth is 10M or 50 PRBs, and one RBG contains 3 PRBs, the system bandwidth contains 17 RBGs, and the last RBG contains only 2 PRBs. In addition, unless otherwise specified, in the embodiments of the present invention, the NCP subframe format is taken as an example, and the ECP subframe format can be derived.

It can also be understood that in the LTE or LTE-A system, the base station can configure cell-specific antenna ports (Cell-specific antenna ports) for cell users, and the number of cell-specific antenna ports can be 1, 2, or 4. When the number of antenna ports dedicated to the cell is 1, the base station configures port 0 for the cell users; when the number of antenna ports dedicated to the cell is 2, the base station configures port 0 and port 1 for the cell users; when the number of antenna ports dedicated to the cell When the number is 4, the base station configures port 0, port 1, port port 2 and port 3. The base station configures a CRS on the resource block according to the configured cell-specific antenna port and the predefined common reference signal (Cell-specific Reference Signal, CRS) pattern corresponding to the cell-specific antenna port, and transmits the resource block carrying the CRS to the cell user. Since CRS can be identified by cell users, cell users can use CRS for automatic gain control (Automatic Gain Control, AGC) adjustment, time-frequency synchronization, radio resource management (Radio Resource Management, RRM) measurement, control channel demodulation, channel state information (Channel State Information, CSI) measurement, data channel demodulation and other operations.

It can also be understood that, depending on the format of the subframe transmission, there are two subframe transmission modes, one is a normal subframe, and FIG. The position in the PRB pair, where the symbol R _p indicates the RE where the reference signal of the cell-specific antenna port p is located, and the filling pattern in Figure 2 is a straight line in the lower left or upper right direction, indicating that the RE where the filling pattern is located is an existing CRS. Since the corresponding signal transmission on different antenna ports uses different space resources to distinguish, when the RE on one antenna port is used to transmit CRS, the RE on other antenna ports does not transmit any information, so the CRS transmission of different antenna ports The resources are time-frequency separated. In FIG. 2 , it is assumed that a physical downlink control channel (Physical Downlink Control Channel, PDCCH) occupies the first two symbols of a subframe. The other is the Multimedia Broadcast multicast service single frequency network (MBSFN) subframe. For the MBSFN subframe, the CRS is only transmitted in the non-MBSFN area of the MBSFN subframe, wherein the non-MBSFN subframe of the MBSFN subframe The area may refer to the area occupied by the PDCCH, usually the first 1 to 2 symbols of the subframe. For example, assuming that the number of PDCCH symbols in an MBSFN subframe is 2, when the number of CRS ports is 1 or 2, the CRS is only transmitted on the first symbol of the MBSFN subframe; when the number of CRS ports is 4, The CRS is only transmitted on the first two symbols of the MBSFN subframe.

In all the embodiments of the present invention, the UE can be a mobile phone, a computer or a portable, pocket-sized, hand-held, computer-built-in, vehicle-mounted mobile device capable of exchanging voice or data with the wireless access network, etc. Radio Access Network (RAN) is a terminal device that communicates with one or more core networks.

The base station in all embodiments of the present invention may be an evolved base station (Evolutional Node B, eNB), a macro base station, a micro base station, a pico base station, an access point (Access Point, AP), a transmission point (Transmission Point, TP), a remote Terminal wireless port (Remote Radio Head, RRH), etc., The present invention is not limited thereto. However, for the convenience of description, the following embodiments will be described by taking a base station and a UE as examples.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1

Please refer to FIG. 3, which is a diagram of an embodiment of a reference signal transmission method provided by an embodiment of the present invention. As shown in FIG. 3, a reference signal transmission method provided by an embodiment of the present invention may include the following steps:

301. The base station configures a first CRS for a resource block.

Wherein, 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.

It should be noted that the data part in the information includes control information and/or data information, and these information are specifically carried on a physical channel, and the physical channel includes one or a combination of the following: PDCCH, PDSCH, Enhanced Physical Downlink Control Channel (Enhanced Physical Downlink Control Channel) -Physical Downlink Control CHannel, EPDCCH), physical control format indicator channel (Physical Control Format Indicator Channel, PCFICH), physical hybrid retransmission indicator channel (Physical hybrid ARQ indicator channel, PHICH), or the same function in some new standards, However, for channels with different names, such as the control channel or data channel introduced in the short TTI transmission, of course, 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 for scheduling the resource block or in a predefined manner. In addition, a special case is that the data part in the information does not contain any information, that is, the information carried by the resource block only includes the reference signal part.

It should be noted that, in this embodiment of the present invention, usually, the base station determines the antenna port information of the first CRS. The base station can enable the UE to obtain the antenna port information of the first CRS in various ways. For example, the base station can notify the UE of the antenna port information of the first CRS through RRC signaling, MAC signaling, or physical layer signaling; (Cyclic Redundancy Check, CRC) to notify the UE of the antenna port information of the first CRS to the UE by scrambling; the base station can notify the UE of the antenna port information of the first CRS in a predefined way; when the base station can pass multiple carriers When communicating with the UE, the base station can also notify the UE of the antenna port information of the first CRS of the own carrier through signaling other than the own carrier, and the specific method of notifying the UE can be selected according to the actual situation. Correspondingly, the UE may determine the number of antenna ports of the first CRS according to the obtained antenna port information of the first CRS. number or the antenna port number of the first CRS.

It should be noted that, during the specific implementation of step 301, the first CRS may be transmitted on a variety of different subframes. As an option, for example, the first CRS may be a CRS transmitted on a normal subframe. For another example, the first CRS is a CRS transmitted on the MBSFN subframe.

It should be noted that during the specific implementation of step 301, the antenna port of the first CRS will change according to the change in 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 configured number of antenna ports of the first CRS is 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, then the antenna ports of the first CRS are 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, then the antenna ports of the first CRS are port 0, port 1, port 2, and port 3.

It should be noted that during the specific implementation of step 301, the size of the resource block can be configured according to the actual situation. For example, the size of the resource block can be all available resources of an integer number of subframes in the system. For example, the resource block in the time domain contains A subframe includes the entire system bandwidth in the frequency domain. For another example, the resource block size may be the full set of all available resources of the system. For another example, the resource block size can be a subset of all available resources in the system. For example, the resource block size is determined by the scheduling method of short TTI transmission. Contains an integer number of symbols. Of course, the size of the resource block can also be configured according to other rules, as long as the short TTI transmission requirement is satisfied.

It should be noted that, in the process of implementing step 301, since the resource block can be a subset or the whole set of all available resources of the system, the configuration of the first CRS by the base station for the resource block can be specifically configured by the base station for all available resources of the system First CRS. Alternatively, configuring the first CRS for the resource block by the base station may specifically be that the base station configures the first CRS for the resource including the resource block. Alternatively, the base station configuring the first CRS for the resource block may specifically configure the base station only for the resource block with the first CRS.

302. The base station configures a supplementary CRS for the resource block configured with the first CRS.

Wherein, 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.

It should be noted that the antenna port of the first CRS refers to the antenna port for transmitting the first CRS. For example, in the case of only one port transmitting the first CRS, the antenna for transmitting the first CRS The port is port 0 as an example, then for the base station, the first CRS is sent through port 0, and for the UE, the first CRS is received through port 0; for another example, the first CRS is transmitted for multiple ports In the case where the first CRS antenna port is transmitted as port 0 and port 1 as an example, then for the base station, the first CRS is sent through port 0 and port 1, and for the UE, it is received through port 0 and port 1 The first CRS. The antenna ports of the second CRS and the antenna ports of the third CRS that appear subsequently in the embodiment of the present invention are similar to this situation.

It should be noted that in the normal 1ms scheduling, when using the transmission mode based on CRS demodulation to transmit the short TTI to the UE, in order to reduce the delay, the UE can only use the scheduled short TTI and the CRS that appeared before. 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 through CRS extrapolation, and the 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, for this situation, it is necessary to supplement the supplementary CRS on the basis of the first CRS. Improved demodulation performance for short TTIs.

It should be noted that there is no absolute sequence relationship between step 302 and step 301 .

It should be noted that during the specific implementation of step 302, the antenna port information supplementing the CRS may be determined in various ways, for example, the antenna port information supplementing the CRS is determined by the base station. For another example, 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 through signaling. For another example, the antenna port information supplementing the CRS is predefined.

It should be noted that, during the specific implementation of step 302, as an option, the supplementary CRS includes a second CRS, and the antenna port of the supplementary CRS is the same as that of the first CRS.

For example, the base station configures a resource block with a first CRS whose antenna ports are port 0 and port 1, and the base station configures a second CRS for the resource block configured with the first CRS, and the antenna ports of the second CRS are port 0 and port 1. 1, the same as the antenna port of the first CRS.

It should be noted that, during the specific implementation of step 302, as an option, the supplementary CRS includes a third CRS, and the antenna port of the supplementary CRS is different from that of the first CRS.

For example, the base station configures a first CRS with antenna ports of port 0 and port 1 for a resource block, and the base station configures a third CRS for the resource block configured with the first CRS, and the antenna port of the third CRS is Port 2 and port 3 are different from the antenna ports of the first CRS. Further optionally, the value of the number of antenna ports of the first CRS can be 1, 2, 4, up to 4, and the corresponding four ports are respectively port 0, port 1, port 2, and port 3. When the first CRS The antenna ports of a CRS are only port 0 and port 1, and when the number of antenna ports of the third CRS is 2, the antenna ports of the third CRS may be port I and port I+1, and the port I and port I+1 It may be port 2 and port 3, or port 1 and port 1+1 may be other port numbers. When the antenna port of the first CRS is only port 0, the number of antenna ports of the third CRS is 1 or 3, and when the number of antenna ports of the third CRS is 1, the antenna port of the third CRS can be port I, the port 1 can be port 1 or other port numbers other than port 2 and port 3; when the number of the antenna ports of the third CRS is 3, the antenna ports of the third CRS can be port 1, port 1 +1 and port 1+2, the port 1, port 1+1 and port 1+2 can be port 1, port 2 and port 3, or the port 1, port 1+1 and port 1+2 can be other ports number, that is, the antenna port of the third CRS is the virtual antenna port of the first CRS, and the UE needs to cooperate with the first CRS and the third CRS to complete operations such as CSI measurement and data channel demodulation.

It should be noted that, during the specific implementation of step 302, as an option, the supplementary CRS includes the above-mentioned second CRS and third CRS, that is, the antenna port of the second CRS among the antenna ports of the supplementary CRS and the first CRS The antenna ports of the CRS are the same, and the antenna ports of the third CRS are different from the antenna ports of the first CRS.

For example, the base station configures a resource block with a first CRS whose antenna ports are port 0 and port 1, and the base station configures a second CRS and a third CRS for the resource block configured with the first CRS, wherein the antenna of the second CRS The ports are port 0 and port 1, and the antenna ports of the third CRS are 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 of the antenna ports are the same as the antenna ports of the first CRS. The antenna ports of the CRS are different.

It should be noted that, since the supplementary CRS in the embodiment of the present invention can be specifically divided into three situations, situation 1, the supplementary CRS only includes the second CRS; situation 2, the supplementary CRS only includes the third CRS; situation 3, the supplementary CRS Both the second CRS and the third CRS are included; the following three situations are introduced respectively.

Case 1: the supplementary CRS only includes the second CRS.

It can be understood that when there is no need to add antenna ports, it is only necessary to reasonably increase the number of second CRSs that are the same as the antenna ports of the first CRS in the resource block, so that the CRS can guarantee high-speed or The performance in various scenarios such as high-order modulation is sufficient, that is, the supplementary CRS only includes the second CRS.

It should be noted that, in the process of implementing step 302, as an option, configuring the supplementary CRS for the resource block by the base station includes configuring the second CRS for at least one antenna port of the first CRS in the resource block by the base station. For example, the antenna ports of the first CRS include port 0 and port 1. When configuring the second CRS, if the CRS that needs to be supplemented in the resource block only involves 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 configure on both ports. Correspondingly, if there are four antenna ports in the first CRS , the second CRS is configured on 1 to 4 ports according to supplementary requirements. Further optionally, the base station may determine the position in the resource block of at least one second CRS corresponding to the antenna port of the first CRS according to the position or density of the first CRS.

For example, please refer to Figure 4a. In Figures 4a to 4g, and Figures 5 and 6, each filling pattern is represented as follows: if the filling pattern is a straight line in the lower left or upper right direction, it means that the RE where the filling pattern is located is the first For a CRS, if the filling pattern is a straight line in the upper left or lower right direction, it means that the RE where the filling pattern is located is the second CRS, and if the filling pattern is a straight line in the vertical direction, it means that the RE where the filling pattern is located is the third CRS.

The first CRS is the position in the PRB pair of the RE mapped by the CRS configured with two cell-specific antenna ports in the normal subframe, and the symbol R _p indicates the RE where the reference signal of the antenna port p is located; the second CRS is based on the location of the first CRS. The positions and densities of the REs in the PRB pair determine the positions of the REs in the PRB pair mapped to the CRS of port 0 and port 1 corresponding to the CRS antenna ports. In one PRB pair, there are 168 REs in total. Among them, the density of the first CRS is 16/168, and the symbols of the first CRS are 0, 4, 7, and 11. Considering the position in the time domain, it can be in symbols 2 and 9 A second CRS of one RE is added to each of port 0 and port 1; considering the position in the frequency domain, the intervals of the supplemented reference signals of port 0 and port 1 in the frequency domain are equal. The density of the supplemented first CRS and second CRS within one PRB pair is 20/168.

For another example, please refer to Figure 4b. The first CRS is the position in the PRB pair of the RE mapped to the CRS configured with 4 cell-specific antenna ports in the normal subframe, and the symbol R _p indicates the RE where the reference signal of the antenna port p is located. . Among them, 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 use the reference of port 2 and port 3 on symbol 1 and symbol 8 in the first CRS on symbol 5 and symbol The signal pattern complements the second CRS corresponding to port 2 and port 3 . It should be noted that FIG. 4b is only a schematic diagram, where the positions of the reference signals of the second CRS corresponding to port 2 and port 3 can be exchanged.

Since UEs that use normal 1ms TTI transmission and UEs that use short TTI transmission may exist in the system at the same time, for UEs that use short TTI transmission, the time between when the UE reports the CSI measurement information to the base station and when the base station uses the CSI information to schedule the UE The time is shortened, and the gain of fast CSI feedback can be obtained in high-speed scenarios, so the CRS can be supplemented according to the length of the scheduled TTI. During the specific implementation of step 302, as an option, configuring the supplementary CRS for the resource block by the base station includes configuring the supplementary CRS by the base station according to the time domain length and/or the frequency domain length of the resource block. Before configuring the supplementary CRS for the resource block, the base station may first determine the length in the time domain and/or the length in the frequency domain of the resource block scheduled to the UE. In short TTI transmission, the length of TTI can 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.; frequency domain The scheduling length can be the same as the length of the 1ms TTI scheduling, or it can be longer or shorter than the length of the 1ms TTI scheduling. Optionally, the base station configures the second CRS for at least one antenna port of the first CRS in the resource block according to the time domain length and/or the frequency domain length of the resource block. Further optionally, the base station may determine at least one second CRS corresponding to the antenna port of the first CRS in the resource block according to the time domain length and/or frequency domain length of the resource block and the position or density of the first CRS in the resource block. The position within the resource block.

For example, please also refer to Figure 4b. The first CRS is the position in the PRB pair of the RE mapped to the CRS configured with 4 cell-specific antenna ports in the normal subframe, and the symbol R _p indicates the RE where the reference signal of the antenna port p is located. . Assume that the subframe can be divided into four short TTIs, where the length of the first and third short TTIs is 4 symbols, and the length of the second and fourth short TTIs is 3 symbols, as shown in Figure 4b It can be seen that the CRSs of port 2 and port 3 are not included in the scheduling resource blocks of the second and fourth short TTIs. Considering that the CRS density of port 2 and port 3 in a PRB pair is smaller than that of port 0 and port 1, the base station can use the symbols in the first CRS in the resource blocks of the second and fourth short TTIs The reference signal patterns of ports 2 and 3 on symbols 1 and 8 complement the second CRS corresponding to ports 2 and 3.

It should be noted that a subframe may include multiple short TTIs of different lengths, or may only include short TTIs of one length. In the above example, a subframe includes short TTIs of two lengths, 3 symbols and 4 symbols. Figure 4c, Figure 4d, Figure 4e and Figure 4f respectively show that the number of antenna ports of the first CRS is 2, and the TTI length is 1, 2, 3, and 4 time domain symbols to supplement the second according to the TTI length. An example of a CRS, wherein the port of the second CRS is port 0 or port 1.

In this embodiment of the present invention, optionally, the second CRS is a cell-specific reference signal, that is, a reference signal that can be identified by all UEs in the cell. Optionally, the second CRS is a group-specific reference signal, such as a reference signal that can be identified by a UE that supports short TTI transmission of one or more lengths. Optionally, the second CRS is a UE-specific reference signal, a reference signal that can be recognized only by UEs scheduled to resource blocks containing the second CRS. Optionally, the second CRS is a UE-specific reference signal, and the base station indicates to the UE whether the second CRS exists and/or indicates the location of the second CRS in the resource block through signaling.

Wherein, as an option, the transmission powers of the second CRS and the first CRS are the same or different. Optionally, when the transmit power of the second CRS and the first CRS are different, the base station may notify the UE of the transmit power of the second CRS and the first CRS through RRC signaling or MAC signaling or physical layer signaling or pre-defined or the relationship between the second CRS and the transmit power of the data, or the transmit power information of the second CRS. The specific notification method is similar to the method of notifying the UE of the antenna port information of the first CRS in the description of step 301 in Embodiment 1, and will not be repeated here.

Wherein, as an option, the second CRS and the first CRS are reference signals with the same characteristics, for example, neither the first CRS nor the second CRS carries precoding matrix information, or both the first CRS and the second CRS carry precoding matrix information. matrix information. Since the antenna port of the first CRS is the same as that of the second CRS, the UE can perform AGC adjustment, time-frequency synchronization, RRM measurement, control channel demodulation, CSI measurement, data channel demodulation, etc. jointly with the first CRS and the second CRS. operate.

In the second case, the supplementary CRS only includes the third CRS.

It can be understood that, in the system, the base station can provide services for multiple UEs in one cell, so there may be scenarios where different UEs have different requirements for the number of configured CRS antenna ports. Optionally, the base station configures the first CRS for all UEs in a cell, and configures the first CRS and supplementary CRS for UEs that require new antenna ports, where the supplementary CRS only includes the third CRS, the third CRS and the first CRS different antenna ports.

It should be noted that the newly added antenna ports configured by the base station for different UEs may be the same or different. For example, the base station can configure the first CRS of 2 antenna ports for all UEs (such as UEs using 1 ms and short TTI transmission), and supplementary configuration of the third CRS of 2 new antenna ports for all UEs using short TTI transmission . For another example, the base station can configure the first antenna port of one antenna port for all UEs. For the CRS, a third CRS with one newly added antenna port is additionally configured for some of the UEs, and a third CRS with three additional antenna ports is additionally configured for another part of the UEs.

During the specific implementation of step 302, optionally, configuring the supplementary CRS for the resource block by the base station includes configuring the third CRS for at least one antenna port of the third CRS in the resource block by the base station.

For example, please refer to Figure 5, the first CRS is the position of the RE mapped to the CRS of the two cell-specific antenna ports configured in the normal subframe in the PRB pair, and the symbol R _p indicates the RE where the reference signal of the antenna port p is located. 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. Figure 5 shows the RE mapped to the CRS corresponding to the CRS antenna port 2 and port 3 of the third CRS in the PRB centered position. Wherein, the base station supplements the third CRS corresponding to port 2' and port 3' on symbol 1 and symbol 8 according to the reference signal patterns of port 2 and port 3 in the first CRS; on symbol 5 and symbol 12 according to symbol 1 and The reference signal pattern on symbol 8 complements the third CRS corresponding to port 2 and port 3 .

During the specific implementation of step 302, optionally, the base station may configure the third CRS for the antenna port of at least one third CRS in the resource block according to the time domain length and/or the frequency domain length of the resource block. Before configuring the third CRS for the resource block, the base station may first determine the length in the time domain and/or the length in the frequency domain of the resource block scheduled to the UE.

In one embodiment, please refer to FIG. 5 , the first CRS is the position in the PRB pair of the RE mapped to the CRS configured with two cell-specific antenna ports in the normal subframe, and the symbol R _p indicates where the reference signal of the antenna port p is located. RE. It is assumed that the subframe can be divided into four short TTIs, wherein the length of the first and third short TTIs is 4 symbols, and the length of the second and fourth short TTIs is 3 symbols. Assuming that the base station determines that the supplementary CRS antenna ports of the subframe are port 2 and port 3, the base station may supplement the third CRS corresponding to port 2 and port 3 respectively in the scheduling resource block of the short TTI.

In another embodiment, optionally, the base station determines that the 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; and/or, the base station determines that the resource block The length of the time domain is N subframes, where N is an integer not less than 1 and not greater than 10. Optionally, the base station determines that the frequency domain length of the resource block is P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs corresponding to the system bandwidth number or REG number. Further optionally, when the base station determines that the time domain length of the resource block is M time domain symbols, configuring the supplementary CRS by the base station includes at least one of the following steps: when M is an integer not less than 1 and not greater than 3 When counting, the base station configures one RE for each antenna port of the third CRS in at least one antenna port of the third CRS in each PRB in the resource block; when M is an integer not less than 4 and not greater than 7 When , the base station configures 2 REs for each antenna port of at least one third CRS antenna port in each PRB in the resource block; when M is an integer not less than 8 and not greater than 14 , the base station configures 4 REs for each antenna port of the third CRS in at least one third CRS antenna port in each PRB in the resource block.

It should be noted that a subframe may include multiple different short TTI lengths, or may include only one short TTI length. Figures 4c to 4g respectively show examples of supplementing the third CRS according to the above principles when the ports of the first CRS are port 0 and port 1, and the TTI length is 1, 2, 3, 4, and 7 symbols. The ports of the third CRS are port 2 and port 3.

In the embodiment of the present invention, the third CRS may be set as multiple types of reference signals, for example, the third CRS may be a cell-specific reference signal, that is, a reference signal that can be identified by all UEs in the cell. For another example, the third CRS may be a group-specific reference signal, such as a reference signal that can be identified by a UE that supports short TTI transmission of one or more lengths. For another example, the third CRS is a UE-specific reference signal, a reference signal that can only be recognized by the UE scheduled to the resource block containing the third CRS, or the UE only has the antenna port configured with the third CRS, the base station will Supplement the third CRS for the UE on the resource block where the UE is scheduled. For another example, the third CRS is a UE-specific reference signal, and the base station indicates to the UE whether the third CRS exists and/or indicates the position of the third CRS in the resource block through signaling.

Optionally, the transmit power of the third CRS is the same as or different from that of the first CRS. Optionally, when the transmit power of the third CRS and the first CRS are different, the base station may notify the UE of the transmit power of the third CRS and the first CRS through RRC signaling or MAC signaling or physical layer signaling or pre-definition or the relationship between the third CRS and the transmit power of the data, or the transmit power information of the third CRS.

Optionally, the third CRS and the first CRS are reference signals having the same feature, for example, neither the first CRS nor the third CRS carries precoding matrix information, or both the first CRS and the third CRS carry precoding matrix information. Since the antenna port of the first CRS is different from the antenna port of the third CRS, 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 before it can combine with the first CRS Perform operations such as AGC adjustment, time-frequency synchronization, RRM measurement, control channel demodulation, CSI measurement, and data channel demodulation with the third CRS.

Optionally, the base station may enable the UE to determine the antenna port of the third CRS in various ways. For example, the base station may notify the UE of the port information used to determine the antenna port of the third CRS through RRC signaling, MAC signaling, or physical layer signaling; the base station may schedule the CRC of the UE's PDCCH Notify the UE of the port information of the antenna port used to determine the third CRS in a scrambling manner; the base station may notify the UE of the port information of the antenna port used to determine the third CRS in a predefined manner; when the base station has multiple carrier, the base station may also notify the UE of the port information of the carrier's antenna port used to determine the third CRS through signaling of a non-local carrier. The specific method of notifying the UE may be selected according to the actual situation. It should be noted that the port information used to determine the antenna ports of the third CRS may be the number of antenna ports of the third CRS, the number of antenna ports of the third CRS, or the total number of antenna ports of the CRS. The total number of antenna ports of the CRS 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, it can use the CRS antenna The total number of ports is used to calculate 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 used for determining the antenna ports of the third CRS.

It can be understood that, in the system, the UE needs to demodulate the PDCCH before determining whether to receive a Physical Downlink Shared CHannel (Physical Downlink Shared CHannel, PDSCH). For the UE configured with the third CRS, optionally, the UE only uses the first CRS to demodulate the PDCCH. Optionally, the UE only uses the third CRS to demodulate the PDCCH. Optionally, the UE needs to jointly use the first CRS and the third CRS to demodulate the PDCCH. It can be understood that before using the third CRS, the UE needs to determine the number of antenna ports of the third CRS or the number of antenna ports of the third CRS.

It can be understood that, considering that the higher transmission power of the reference signal can make channel estimation more accurate, when the reference signal and data are transmitted on the same symbol, the base station can put part of the transmission power of the data on the symbol into the symbol On the reference signal, the transmission power of the reference signal is increased to improve the performance of channel estimation. Correspondingly, the UE needs to determine the reference signal and the power information of the data in order to demodulate the data correctly. Therefore, optionally, the base station notifies the UE of reference signal and power control parameter information for data transmission, where the power control parameter information may include at least one of the following information: pilot data power on symbols with the first CRS and supplementary CRS Ratio; pilot data power ratio on symbols without first CRS and supplementary CRS; data power ratio on symbols with first CRS and supplementary CRS and without second CRS The ratio of the data power on the symbols of the first CRS and the complementary CRS; the number of antenna ports of the first CRS; the number of antenna ports of the third CRS; the sum of the numbers of the antenna ports of the first CRS and the third CRS.

Case 3: The supplementary CRS includes the second CRS and the third CRS.

It can be understood that in the system, the base station can provide services for multiple UEs in a cell, which may include situations where the second CRS and the third CRS need to be supplemented at the same time, for example, different UEs may have requirements for the number of CRS antenna ports configured In different scenarios, for example, the number of CRS antenna ports required by some UEs is more than the number of CRS antenna ports required by other UEs, and for all UEs in the cell, the number of first CRSs in the resource block is insufficient, resulting in Performance in various scenarios such as high-speed or high-order modulation cannot be guaranteed. At this time, as an option, the base station can configure the first CRS and the second CRS for the UEs in a cell, and additionally configure the third CRS and the second CRS antenna port for UEs that require new antenna ports. The port is the same as the antenna port of the first CRS, and the antenna port of the third CRS is different from that of the first CRS.

Wherein, in the process of implementing step 302, as an option, a second CRS configuration step is included: the base station configures a second CRS for at least one antenna port of the first CRS in the resource block; and a third CRS configuration step: the base station The third CRS is configured for the antenna port of at least one third CRS in the resource block.

It can be understood that there is no absolute sequence relationship between the second CRS configuration step and the third CRS configuration step, wherein the specific second CRS configuration step is similar to the above scenario 1, please refer to the above scenario 1, and the specific 1st CRS configuration step Three CRS configuration steps are similar to the above-mentioned scenario two, refer to the above-mentioned scenario two, and will not be repeated here.

It can be understood that the second CRS and the third CRS may be the same type of reference signal, for example, both the second CRS and the third CRS are cell-specific reference signals, or both the second CRS and the third CRS are group-specific reference signals. signal, or the second CRS and the third CRS are all 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 the group-specific reference signal. In one embodiment, please refer to FIG. 6 , the first CRS is the position of the RE mapped to the CRS configured with two cell-specific antenna ports in the normal subframe in the PRB pair, and the symbol R _p indicates where the reference signal of the antenna port p is located. RE. The second CRS is a group-specific reference signal corresponding to CRS antenna port 0 and port 1, and the second CRS can be identified by all UEs that support short TTI transmission; the third CRS is a UE-specific reference signal corresponding to CRS antenna port 2 and port 3 signal, the third CRS may be identified by the UE configured with the third CRS antenna port and scheduled to the resource block carrying the third CRS.

It can be understood that, also refer to Fig. 4c to Fig. 4g, 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 The distribution situation of the first CRS, the second CRS and the third CRS in the PRB pair when there are 1 and 7.

It should be noted that when the first CRS, the second CRS, and the third CRS are configured in the resource block according to the time domain symbol of the short TTI, in the resource block, the RE where the second CRS is located is different from the RE where the third CRS is located. The same, that is, for one RE in a resource block, it will only be configured as a CRS for one antenna port. Of course, if the second CRS configured in the second CRS configuration step and the first CRS configured in the third CRS step are configured When the three CRSs are configured on 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 priority of the configuration of the third CRS is higher. For example, assuming that most UEs in the cell need to use the third CRS to complete signal processing at the receiving end, at this time In the case where the second CRS and the third CRS overlap in the same RE, the third CRS can be preferentially configured on the RE; for another example, the current demand for the second CRS is large, that is, only a small part of UEs in the cell need to use the third CRS. Three CRSs are used to complete the signal processing at the receiving end, and more UEs need to use the second CRS to assist channel estimation, so that the demodulation performance of the receiving end can be guaranteed in high-speed or high-order scenarios. At this time, for the second CRS and the third CRS in If the same RE overlaps, the second CRS can be preferentially configured on the RE. It should be noted that, in this way of configuring according to the current system requirement, the base station needs to notify the UE of the antenna port corresponding to the CRS on the RE.

It can be seen that in this embodiment, when the second CRS and the third CRS overlap on the RE of the resource block, the most effective allocation will be flexibly performed according to the current situation. Of course, in some embodiments, when When the second CRS and the third CRS overlap on the RE of the resource block, a rule may also be defined in advance, that is, when the overlap occurs, they are all allocated to the second CRS or the third CRS.

Optionally, in this embodiment, 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. For example, assume that the base station configures the number of antenna ports of the first CRS to be 2, the number of antenna ports of the third CRS is also 2, and the base station has 8 physical antennas. In the process of antenna virtualization, each antenna port of the first CRS and each antenna port of the third CRS can correspond to two physical antennas, that is, Two physical antennas transmit the 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.

303. The base station transmits the resource block carrying the first CRS and the supplementary CRS.

It can be understood that after the base station configures the first CRS and the supplementary CRS on the resource block, the base station transmits the resource block. Wherein, optionally, the resource block only bears the first CRS and supplementary CRS; optionally, the resource block bears other information, such as control information and/or data information, in addition to the first CRS and supplementary CRS Wait.

It should be noted that, in this embodiment, optionally, the base station may notify the UE of the size of the resource block by means of predefinition or signaling indication. Optionally, the manners of the base station notifying the length in the time domain and the length in the frequency domain of the resource block may be the same or different. For example, the base station can specify the length of the resource block in a predefined way, and notify the UE of the frequency domain length of the resource block through signaling indication; the base station can also notify the time domain length and frequency domain length of the resource block through signaling indication. field length.

It should be noted that the content of step 303 is different for the above three situations. For example, for the above situation 1, when the supplementary CRS only includes the second CRS, step 303 can specifically be: the base station transmits the first CRS and A resource block of the second CRS;

For another example, for scenario 2, when the supplementary CRS only includes the third CRS, step 303 may specifically be: the base station transmits resource blocks carrying the first CRS and the third CRS;

For another example, in case three, when the supplementary CRS includes both the second CRS and the third CRS, step 303 may specifically be: the base station transmits resource blocks carrying the first CRS, the second CRS, and the third CRS.

It can be seen that by using the reference signal transmission method of the embodiment of the present invention, by configuring and transmitting the first CRS and the supplementary CRS in the resource block, when the antenna port of the supplementary CRS is the same as the antenna port of the first CRS, it can increase 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 that of the first CRS, it can support different The UE uses different CRS antenna ports for data transmission.

Example 2

Another reference signal transmission method according to the embodiment of the present invention is introduced below. Please refer to FIG. 7 , which is an embodiment diagram of the reference signal transmission method provided by the embodiment of the present invention. A method for transmitting a reference signal may include the following steps:

701. The base station determines the length in the time domain and/or the length in the frequency domain of a resource block.

Wherein, the resource block is used to bear the information transmitted between the base station and the UE, and the information includes a data part and a reference signal part.

It should be noted that the data part in the information includes control information and/or data information, and these information are specifically carried on a physical channel, and the physical channel includes one or a combination of the following: PDCCH, PDSCH, Enhanced Physical Downlink Control Channel (Enhanced Physical Downlink Control Channel) -Physical Downlink Control CHannel, EPDCCH), physical control format indicator channel (Physical Control Format Indicator Channel, PCFICH), physical hybrid retransmission indicator channel (Physical hybrid ARQ indicator channel, PHICH), or the same function in some new standards, However, for channels with different names, such as the control channel or data channel introduced in the short TTI transmission, of course, 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 for scheduling the resource block or in a predefined manner. In addition, a special case is that the data part in the information does not contain any information, that is, the information carried by the resource block only includes the reference signal part.

It should be noted that the resource block is a resource block scheduled for UE for signal transmission, so the size of the resource block needs to be determined, that is, the time domain length and/or the frequency domain length of the resource block. Usually, the resource block size can be a subset of all available resources in the system, which is determined by the scheduling method of the base station, that is, the frequency domain includes an integer number of PRBs or integer number of RBGs or an integer number of subcarriers, and the time domain includes an integer number of symbols.

It should be noted that if only the frequency domain length is determined but the time domain length is not determined, the default time domain length is 7 time domain symbols or 14 time domain symbols, which is equivalent to 1 time slot in the existing division method Or 1 subframe, if the length of the time domain is determined but the length of the frequency domain is not determined, the existing division method is used by default, that is, the length of the frequency domain is the frequency domain length of 1 PRB or 1 RBG.

As an option, there are multiple ways for the base station to determine the time-domain length and/or frequency-domain length of the resource block in step 701. Specifically, for the base station to determine the time-domain length of the resource block, at least one of the following ways may be used,

Mode 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.

Mode 2: The base station determines that the time domain length of the resource block is N subframes, where N is an integer not less than 1 and not greater than 10.

Method 3: The base station determines that a subframe contains an integer number of resource blocks, where the time domain length of each resource block can be the same, for example, a subframe contains 7 resource blocks with a TTI length of 2 symbols, or a subframe contains Two resource blocks with a TTI length of 7 symbols; the time domain length of each resource block can also be different, for example, a subframe contains 4 resource blocks, and the corresponding TTI lengths are 4, 3, 4, 3 symbols.

For the base station to determine the frequency domain length of the resource block, the following methods can be adopted:

The base station determines the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth.

702. The base station configures a first DM-RS for a resource block.

Wherein, the antenna port of the first DM-RS is a UE-dedicated demodulation antenna port, and the reference signal part includes the first DM-RS.

It can be understood that after the resource block is determined, the configuration process of the first DM-RS can be performed. Specifically, the antenna port of the first DM-RS is determined first, and the port information of the antenna port can be determined by the base station; It can also be determined by the UE, and report the antenna port information of the first DM-RS to the base station through signaling; the antenna port of the first DM-RS can also be pre-defined, and both the base station and the UE follow the pre-defined Determine the antenna port of the first DM-RS.

Wherein, after determining the time-domain length and/or frequency-domain length in step 701, the base station configures the first DM-RS antenna ports with different numbers of REs in each PRB according to the difference in the time-domain length. DM-RS.

In the process of implementing step 702, optionally, the base station determines that the time domain length of the resource block is M time domain symbols, and according to the difference in the time domain length of the resource block, configuring the first DM-RS by the base station includes the following steps at least one:

1. When M is an integer not less than 1 and not more than 3, the base station configures the first DM-RS for the resource block according to the antenna port of the first DM-RS, including:

The base station configures one RE for each antenna port of the first DM-RS among the antenna ports of at least one first DM-RS in each PRB in the resource block;

Specifically, when M is not less than 1 and not greater than 3, the allocation situation of the first DM-RS is similar to the situation for the distribution of the third CRS in the second situation in the embodiment shown in FIG. 3 .

2. When M is an integer not less than 4 and not greater than 7, the base station configures the first DM-RS for the resource block according to the antenna port of the first DM-RS, including:

The base station configures 2 REs for each antenna port of the first DM-RS in at least one antenna port of the first DM-RS in each PRB in the resource block;

Specifically, when M is not less than 4 and not greater than 7, the allocation situation of the first DM-RS is similar to the situation for the distribution of the third CRS in the second situation in the embodiment shown in FIG. 3 .

3. When M is an integer not less than 8 and not greater than 14, the base station configures the first DM-RS for the resource block according to the antenna port of the first DM-RS, including:

The base station configures 4 REs for each antenna port of the first DM-RS in at least one antenna port of the first DM-RS in each PRB in the resource block.

It should be noted that, in addition to the above situation, M can also take two alternate values of 3 and 4, that is, the time-domain length of the resource block is not constant for one layer, but consists of four time-domain symbols and three The time-domain symbol lengths alternate.

In the process of implementing step 702, optionally, the maximum number of antenna ports supported by the first DM-RS is Y, and the corresponding ports are 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 ports are port A to port (A+X-1); the base station Configuring the first DM-RS includes at least one of the following methods:

1. 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 the first DM-RSs of different antenna ports use different reference signal sequences. The first DM-RS occupies the same time-frequency resource.

2. The base station configures Z REs for each antenna port of the first DM-RS in each PRB in the resource block. Z can be a predefined value or the maximum number of antenna ports that the first DM-RS can support Y ; where the first DM-RSs of different antenna ports use different reference signal sequences, and when X is greater than 1, the first DM-RSs of some or all of the X antenna ports occupy the same time-frequency resource. For example, assuming that the value of Y is 4 and the value of 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, each DM-RS in the resource block 2 REs are occupied in a PRB; When X is equal to 4, the first DM-RS of port A and port (A+1) occupy the same time-frequency resources, specifically, each PRB in the resource block occupies 2 REs, and port (A+2) and The first DM-RS of the port (A+3) occupies the same time-frequency resource, specifically, each PRB in the resource block occupies another 2 REs.

3. The base station configures Z REs for each antenna port of the first DM-RS in each PRB in the resource block, and Z is a value determined by the number X of antenna ports of the first DM-RS; where different antennas The first DM-RS of the port uses a different reference signal sequence. For example, as shown in Figure 8, if the filling pattern is a straight line in the lower left or upper right direction, it means that the RE where the filling pattern is located is the first CRS, and if the filling pattern is a horizontal and vertical crossing straight line, it means that the RE where the filling pattern is located The reference signals of the two ports are port A and port (A+1), and the fill pattern is a diagonal cross line, which means that the reference signal on the RE where the fill pattern is located is port A and port (A+1) when two ports are configured. When configuring four ports, it is port (A+2) and port (A+3). Specifically, assuming that the value of Y is 4, when X is equal to 2, the value of Z is 4, and port A and port (A+ 1) The first DM-RS occupies the same time-frequency resource, specifically, each PRB in the resource block occupies 4 REs; when X is equal to 4, the value of Z is 2, port A and port (A+1 ) occupy the same time-frequency resource, specifically, each PRB in the resource block occupies 2 of the above 4 REs, and the first DM-RS of port (A+2) and port (A+3) A DM-RS occupies the same time-frequency resource, specifically, each PRB in the resource block occupies the other 2 REs among the above 4 REs.

In the process of implementing step 702, optionally, 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 symbols of the resource block After a symbol, operations such as channel estimation can be performed through the first DM-RS on the symbol, thereby reducing the time delay for the UE to demodulate the resource block.

It should be noted that the first DM-RS may be a reference signal transmitted by the base station to the UE for demodulation of the downlink control channel or data channel, or may be a reference signal transmitted by the UE to the base station for demodulation of the uplink control channel or data channel. reference signal.

Optionally, the first DM-RS is a UE-specific reference signal, a reference signal that can only be recognized by UEs scheduled to resource blocks containing the first DM-RS, or only UEs configured with the first DM-RS An antenna port, the base station will transmit the first DM-RS for the UE on the resource block to which the UE is scheduled. Optionally, the first DM-RS is a UE-specific reference signal, and the base station indicates to the UE that the first DM-RS Whether it exists and/or indicates the position of the first DM-RS in the resource block.

In addition to configuring the first DM-RS for the resource block, as an option, 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. Optionally, when configuring the first CRS in the resource block, the base station configures the second CRS for the resource block according to at least one antenna port of the first CRS.

Wherein, for the specific configuration method of the first CRS, refer to the step 301 in the embodiment shown in FIG. Neither will repeat them.

703. The base station transmits the resource block carrying the first DM-RS.

It can be understood that after the base station configures the first DM-RS in the resource block, the base station transmits the resource block. Wherein, optionally, only the reference signal is carried on the resource block, specifically, 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 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. It should be noted that when the first DM-RS and at least one of control information and data information exist in the resource block at the same time, optionally, the first DM-RS and at least one of the control information and data information One carries the same precoding information.

It can be understood that, for the above three situations, the specific execution content of step 703 is different. For example, for the situation where the resource block is configured with the first DM-RS, step 703 is specifically: the base station transmits the resource block carrying the first DM-RS resource block;

For the situation where the resource block is configured with the first DM-RS and the first CRS, step 703 is specifically: the base station transmits the resource block carrying the first DM-RS and the first CRS;

For the situation where the resource block is configured with the first DM-RS, the first CRS and the second CRS, step 703 specifically includes: the base station transmits the resource block carrying the first DM-RS, the first CRS and the second CRS.

It can be seen that 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 communicate with the UE using the transmission mode of short TTI transmission based on DMRS demodulation. to communicate.

Example 3

This embodiment of the present invention proposes a reference signal transmission method corresponding to Embodiment 1 of the present invention, as shown in The above method can be executed by the receiving device corresponding to the base station in Embodiment 1 of the present invention.

Please refer to FIG. 9. FIG. 9 is a diagram of an embodiment of a reference signal transmission method provided by an embodiment of the present invention. As shown in FIG. 9, an embodiment of the present invention provides a reference signal transmission method, which may include the following steps:

901. The UE receives a resource block transmitted by a base station and carrying a first CRS and a supplementary CRS.

Wherein, 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, the reference signal part includes the first CRS and the supplementary CRS, the 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.

It can be understood that, in this embodiment of the present invention, 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 to enable the UE to obtain the antenna port information of the first CRS described in Embodiment 1 of the present invention. Let me repeat.

It can be understood that, in this embodiment of the present invention, the first CRS may be a CRS transmitted on a normal subframe, or may be a CRS transmitted on an MBSFN subframe.

It can be understood that, in the embodiment of the present invention, the method for configuring the size of the resource block is the same as the method for configuring the size of the resource block described in Embodiment 1 of the present invention, and will not be repeated here.

It can be understood that, in the embodiment of the present invention, 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 described in Embodiment 1 of the present invention, and will not be repeated here.

It should be noted that the supplementary CRS may include a second CRS and/or a third CRS, the antenna port of the second CRS is the same as that of the first CRS, and the antenna port of the third CRS is different from that of the second CRS.

Optionally, the supplementary CRS only includes the second CRS, wherein the determination of the antenna port of the second CRS and the second CRS configuration process are the same as the method described in the first case in step 302 of Embodiment 1 of the present invention, and will not be repeated here .

Optionally, the supplementary CRS only includes the third CRS, wherein the determination of the antenna port of the third CRS and the third CRS configuration process are the same as the method described in the second case in step 302 of Embodiment 1 of the present invention, and will not be repeated here .

Optionally, the supplementary CRS includes a second CRS and a third CRS, wherein 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 the method described in the third case in step 302 of Embodiment 1 of the present invention, and will not be repeated here.

It can be understood that, in this embodiment of the present invention, when the supplementary CRS includes at least the third CRS, the method for the UE to obtain the antenna port information of the third CRS is the same as the method for the base station to enable the UE to obtain the third CRS described in Embodiment 1 of the present invention. The method for the antenna port information is the same, and will not be repeated here.

It can be understood that, in this embodiment of the present invention, the method for the UE to determine the power information of the reference signal and data is the same as the method for the base station to notify the UE of the power control parameter information of the reference signal and data transmission described in Embodiment 1 of the present invention. I won't repeat them here.

It can be understood that, in this embodiment of the present invention, the method for the UE to determine the time-domain length and the frequency-domain length of the resource block is the same as that described in Embodiment 1 of the present invention for 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 repeated here.

It should be noted that the supplementary CRS and the first CRS are reference signals with the same characteristics, for example, neither the first CRS nor the supplementary CRS carries precoding matrix information, or both the first CRS and the supplementary CRS carry precoding matrix information.

Optionally, in this embodiment of the present invention, the first CRS and the second CRS have the same antenna virtualization method, and the first CRS and the third CRS may have the same antenna virtualization method or different antenna virtualization methods Way. The specific virtualization process is similar to the antenna virtualization process in the description of step 302 in Embodiment 1 shown in FIG. 3 , and will not be repeated here.

902. The UE demodulates the data part of the information carried on the resource block according to the first CRS and the supplementary CRS.

In a specific implementation process, the UE may also 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.

It should be noted that the data part in the information includes control information and/or data information, and the information is specifically carried on a physical channel, and the physical channel includes one or a combination of the following: PDCCH, PDSCH, EPDCCH, PCFICH, PHICH, or Channels with the same function but different names in some new standards, such as control channels or data channels introduced in short TTI transmission, of course, 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 for scheduling the resource block or in a predefined manner. due to supplemental CRS The first CRS is a reference signal having the same characteristics, and the UE can jointly supplement the CRS and the first CRS to demodulate the information carried on the resource block. In addition, a special case is that the data part in the information does not contain any information, that is, the information carried by the resource block only includes the reference signal part. In this case, 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.

It can be understood that, in the system, the UE needs to demodulate the PDCCH before determining whether to receive the PDSCH. For the UE configured with the third CRS, optionally, the UE only uses the first CRS to demodulate the PDCCH. Optionally, the UE only uses the third CRS to demodulate the PDCCH. Optionally, the UE needs to jointly use the first CRS and the third CRS to demodulate the PDCCH. It can be understood that before using the third CRS, the UE needs to determine the number of antenna ports of the third CRS or the number of antenna ports of the third CRS.

It should be noted that, in the case of no supplementary CRS, the base station will notify the UE of the power control parameters and the number of antenna ports of the first CRS through high-level signaling, and the UE determines the power control parameters and the number of antenna ports of the first CRS. The ratio of the data power on the symbol with the first CRS to the data power on the symbol without the first CRS, so as to correctly use the channel estimation result obtained by the first CRS to demodulate the information carried on the resource block. Therefore, optionally, the UE receives the signaling sent by the base station for determining the power control parameter, the signaling may be radio resource control RRC signaling or medium access control MAC signaling or physical layer signaling, and the UE receives the signaling according to the signaling Power control information on resource blocks is determined. Optionally, the power control information is specifically the ratio of data power on symbols with the first CRS and supplementary CRS to data power on symbols without the first CRS and supplementary CRS, and the UE correctly uses the first CRS according to the power control information. The channel estimation results obtained by the first CRS and the supplementary CRS demodulate the information carried on the resource blocks.

Example 4

The embodiment of the present invention proposes a method for transmitting a reference signal corresponding to Embodiment 2 of the present invention, and the shown method may be executed by a receiving device corresponding to the base station corresponding to Embodiment 2 of the present invention.

Please refer to FIG. 10. FIG. 10 is a diagram of an embodiment of a reference signal transmission method provided by an embodiment of the present invention. As shown in FIG. 10, an embodiment of the present invention provides a reference signal transmission method, which may include the following steps:

1001. The UE receives a resource block carrying a first DM-RS transmitted by a base station.

Wherein, the resource block is used to carry the information transmitted between the base station and the UE, the information includes a data part and a reference signal part, the reference signal part includes the first DM-RS, and the antenna port of the first DM-RS is dedicated to the UE Demodulates the antenna port.

It should be noted that the data part in the information includes control information and/or data information, and the information is specifically carried on a physical channel, and the physical channel includes one or a combination of the following: PDCCH, PDSCH, EPDCCH, PCFICH, PHICH, or Channels with the same function but different names in some new standards, such as control channels or data channels introduced in short TTI transmission, of course, 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 for scheduling the resource block or in a predefined manner. The UE may use the first DM-RS to demodulate the information carried on the resource block. In addition, a special case is that the data part in the information does not contain any information, that is, the information carried by the resource block only includes the reference signal part. In this case, 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.

It can be understood that, in this embodiment of the present invention, 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 to enable the UE to obtain the antenna port information of the first DM-RS described in Embodiment 2 of the present invention , which will not be repeated here.

It can be understood that, in this embodiment of the present invention, the method for the UE to determine the time-domain length and the frequency-domain length of the resource block is the same as that described in Embodiment 2 of the present invention for 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 repeated here.

It can be understood that, in this embodiment of the present invention, 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 to configure the first DM-RS for the resource block described in Embodiment 2 of the present invention. Let me repeat.

Optionally, the base station may configure the first CRS for the resource block. In the embodiment of the present invention, 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 described in Embodiment 2 of the present invention, and will not be repeated here.

Optionally, the base station may configure the first CRS and the second CRS for the resource block. In this embodiment of the present invention, 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 described in Embodiment 2 of the present invention. repeat.

It can be understood that, in this embodiment of the present invention, the first CRS may be a CRS transmitted on a normal subframe, or may be a CRS transmitted on an MBSFN subframe.

1002. The UE demodulates the data part of the information carried on the resource block according to the first DM-RS.

In a specific implementation process, the UE may also 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.

Optionally, during the specific implementation of step 1002, the information carried on the resource block includes control information and/or data information, and the UE may cooperate with the first DM-RS to demodulate the information carried on the resource block.

Optionally, when the resource block also carries the first CRS and/or the second CRS, the UE 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.

Example 5

The reference signal transmission method of the embodiment of the present invention is introduced above, and the base station of the embodiment of the present invention is introduced below, please refer to FIG. 11 . FIG. 11 is a diagram of an embodiment of the base station of the embodiment of the present invention, as shown in FIG. 11 , an embodiment of the present invention provides a base station, the base station 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, and the base station may include:

The first configuration module 1101 is configured to configure a first CRS for a 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 antenna port information may be notified to the UE in various ways, and the specific notification method is similar to the related content in the description of step 301 in the embodiment shown in FIG. 3 , and will not be repeated here.

Wherein, the data part includes control information and/or data information, and the description of the control information and data information is similar to the relevant part in the description of step 301 in Embodiment 1 shown in FIG. 3 , and will not be repeated here.

Wherein, the size of the resource block can be configured according to the actual situation, and the specific configuration process is similar to the relevant part in the description of step 301 in Embodiment 1 shown in FIG. 3 , and will not be repeated here.

In addition, the first configuration module 1101 is also configured to configure a supplementary CRS for the resource block, and the days of the supplementary CRS The line port is the same as or different from the antenna port of the first CRS;

Among them, the supplementary CRS can 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. There are three situations in which the second CRS and the first CRS have the same antenna port, but the antenna port of the third CRS is different from the antenna port of the first CRS and the second CRS, when the supplementary CRS is the second CRS, the first configuration module 1101 can 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 will first determine the time domain length and/or frequency domain length of the resource block, and determine the third CRS of the resource block An antenna port, and then configure a third CRS for the antenna port of at least one third CRS according to the time domain length and/or frequency domain length; the case where the supplementary CRS includes the second CRS and the third CRS is to combine the two cases.

Among them, the specific configuration process of the three situations is similar to the description for the first, second and third situations in the description of step 302 in the embodiment shown in FIG. , Case 2 corresponds to the supplementary CRS being the third CRS, and Case 3 corresponds to the supplementary CRS being the second CRS and the third CRS, which will not be repeated here.

In addition, the first configuration module 1101 can also be used to determine the time-domain length and the frequency-domain length of the resource block, wherein the determination of the time-domain length of the resource block can include: determining that the time-domain length of the resource block is M time-domain Symbol, M is an integer not less than 1 and not greater than 14; determine the time domain length of the resource block as N subframes, and N is an integer not less than 1 and not greater than 10; one or both of these two methods are used Joint determination is acceptable, and the determination of the frequency domain length of the resource block may include: determining the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the system The number of PRBs or RBGs or REs or REGs corresponding to the bandwidth. The specific process of determining the time-domain length and the frequency-domain length of the resource block is the same as the determination of the time-domain length and the frequency-domain length of the resource block in the description of the second embodiment in the description of step 302 in the first embodiment shown in FIG. 3 Similar and will not be repeated here.

Wherein, when determining the time domain length of the resource block by determining the time domain length of the resource block as M time domain symbols, the first configuration module 1101 is also specifically used for:

When M is an integer not less than 1 and not greater than 3, configure one RE for each antenna port of the third CRS among the antenna ports of at least one third CRS in each PRB in the resource block;

or,

When M is an integer not less than 4 and not greater than 7, configure 2 REs for each antenna port of at least one third CRS antenna port in each PRB in the resource block;

or,

When M is an integer not less than 8 and not more than 14, configure 4 REs for each antenna port of at least one third CRS antenna port in each PRB in the resource block.

It can be seen that when the time domain lengths of resource blocks are different, the number of REs configured by the first configuration module 1101 for each antenna port of at least one third CRS antenna port in each PRB is different .

The base station also includes a first transceiver module 1102, configured to transmit resource blocks, and the reference signal part of the information carried by the resource blocks includes a first CRS and a supplementary CRS.

It should be noted that the first configuration module 1101 is used to realize the content involved in step 301 and step 302 in the first embodiment shown in FIG. 3 , and the first transceiver module 1102 is used to realize the steps in the first embodiment shown in FIG. 3 The content involved in 303.

It can be understood that when the first configuration module 1101 configures the first CRS for the resource block, it will first determine the antenna port information of the first CRS. After the first configuration module 1101 configures the first CRS, it will further configure the resource block. Configure the supplementary CRS, 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 needs to keep a short delay so that the second CRS The first CRS has poor demodulation performance for some data, and the third CRS is because the UE supporting 4 antenna ports and DMRS will have a large overhead. By properly configuring the third CRS, the overhead of reference signals in each subframe can be reduced. After the supplementary CRS is configured, the configured resource block will be sent out through the first transceiver module 1102, so that the UE can receive the resource block, and combine the first CRS and the supplementary CRS to decode the data part of the resource block information. Tune.

Example 6

The reference signal transmission method of the embodiment of the present invention is introduced above, and another implementation mode of the base station of the embodiment of the present invention is introduced below, please refer to FIG. 12 , which is a diagram of an embodiment of the base station of the embodiment of the present invention , as shown in FIG. 12 , an embodiment of the present invention provides a base station, the base station 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 second configuration module 1201 is configured to determine the time domain length and/or the frequency domain length of the resource block, the resource block is used to carry the information transmitted between the base station and the UE, and the information includes a data part and a reference signal part;

Wherein, the second configuration module 1201 can also be used to determine the time-domain length and the frequency-domain length of the resource block, wherein the determination of the time-domain length of the resource block can include: determining that the time-domain length of the resource block is M time-domain Symbol, M is an integer not less than 1 and not greater than 14; determine the time domain length of the resource block as N subframes, and N is an integer not less than 1 and not greater than 10; one or both of these two methods are used Joint determination is acceptable, and the determination of the frequency domain length of the resource block may include: determining the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the system The number of PRBs or RBGs or REs or REGs corresponding to the bandwidth. The specific process of determining the time-domain length and the frequency-domain length of the resource block is the same as the determination of the time-domain length and the frequency-domain length of the resource block in the description of the second embodiment in the description of step 302 in the first embodiment shown in FIG. 3 Similar and will not be repeated here.

In addition, the second configuration module 1201 is also used to configure the first DM-RS for the resource block, and the antenna port of the first DM-RS is a UE-dedicated demodulation antenna port;

Wherein, the second configuration module 1201 can also configure Y REs for each antenna port of the first DM-RS in at least one antenna port of the first DM-RS in each PRB in the resource block, where Y is The maximum number of antenna ports that the first DM-RS can support, the first DM-RSs of different antenna ports use different reference signal sequences, and the first DM-RSs of different antenna ports occupy the same time-frequency resources.

It should be noted that the specific determination process of the time-domain length and the frequency-domain length of the resource block is similar to the relevant part of the description for step 701 in the embodiment shown in FIG. 7 , and will not be repeated here.

The base station further includes a second transceiver module 1202, configured to transmit resource blocks, and the reference signal part of the information carried by the resource blocks includes the first DM-RS.

In addition, the second configuration module 1201 can also configure the first CRS for the resource block configured with the first DM-RS. At this time, the second transceiver module 1202 is specifically used to transmit the resource block, and the reference signal part of the resource block includes the first DM-RS -RS and the first CRS; the second configuration module 1201 can also reconfigure the second CRS for the resource block configured with the first DM-RS and the first CRS. At this time, the second transceiver module 1202 is specifically used to transmit the resource block, the The reference signal portion of the resource block includes a first DM-RS, a first CRS, and a second CRS. The specific configuration process of the first CRS and the second CRS is similar to the relevant configuration process in the description of step 702 in Embodiment 2 shown in FIG. 7 , and will not be repeated here.

It can be understood that because the short TTI will also affect the first CRS at the same time, that is, in order to keep a short delay, the demodulation performance of some data parts on the resource block through the demodulation of the first CRS will be deteriorated, so it is necessary to The first CRS layout (the layout of the existing CRS) is adjusted, and the second configuration module 1201 can supplement the second CRS in the resource block to improve the demodulation performance, so that the data part with poor demodulation performance on the resource block can be combined For details about the demodulation of the first CRS and the second CRS, refer to the relevant part in the description of step 702 in Embodiment 2 shown in FIG. 7 , which will not be repeated here.

It should be noted that the second configuration module 1201 is used to realize the content involved in step 701 and step 702 in the second embodiment shown in FIG. 7 , and the first transceiver module 1202 is used to realize the steps in the second embodiment shown in FIG. 7 The content covered in 703.

It can be understood that since 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), some resource blocks will have no DMRS. Therefore, it is necessary to Adding a new DMRS so that all resource blocks have DMRS, the specific arrangement can be in many ways, as long as all resource blocks have DMRS; in the embodiment of the present invention, the second configuration module 1201 configures the resource blocks Before the first DM-RS, the time domain length and frequency domain length of the resource block will be determined first, and then the first DM-RS will be configured according to the time domain length and frequency domain length of the resource block, so that all resource blocks Both have adequate DMRS.

Example 7

The reference signal transmission method of the embodiment of the present invention is introduced above, and the base station of the embodiment of the present invention is introduced below, please refer to FIG. 13. FIG. 13 is a diagram of an embodiment of the user equipment of the embodiment of the present invention, as shown in FIG. 13 As shown, an embodiment of the present invention provides a user equipment, which may include:

The third transceiver module 1301 is configured to receive the resource block carrying the first CRS and the supplementary CRS transmitted by the base station, where the resource block is used to carry the information transmitted between the base station and the UE, and the information includes a data part and a reference signal part, refer to The signal part 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 of the supplementary CRS is the same as or different from the antenna port of the first CRS;

Wherein, the supplementary CRS includes a second CRS and/or a third CRS, the antenna port of the second CRS is the same as that of the first CRS, and the antenna port of the third CRS is different from that of the first CRS.

It can be understood that the type of the supplementary CRS in the resource block received by the third transceiver module 1301 can be divided into three situations, 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 process of the CRS in these three situations may correspond to the three situations for the supplementary CRS in the description of step 302 in Embodiment 1 shown in FIG. 3 .

The user equipment also includes a first demodulation module 1302, configured to demodulate the data part of the information carried on the resource block according to the first CRS and the supplementary CRS. Wherein, 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 will not be repeated here.

Understandably,

Wherein, the data part may include control information and data information, and the control information and data information are similar to the relevant parts in the description of step 301 in Embodiment 1 shown in FIG. 3 , and will not be repeated here.

As an option, in this embodiment, the user equipment may further include:

The first determination module 1303 is configured to determine that the 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;

and / or,

The length of the time domain 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 also used for:

Determine the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth.

It can be seen that the first determination module 1303 can determine the time domain length of the resource block as M time domain symbols, or determine the time domain length of the resource block as N subframes, or a combination of the two. 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 embodiment in the description of step 302 in the first embodiment shown in FIG. repeat.

In addition, the third transceiver module 1301 is also configured to receive signaling sent by the base station for determining port information and/or power control parameters of the antenna port of the third CRS, where the signaling is radio resource control RRC signaling or media access control MAC signaling or physical layer signaling; at this time, the first determining module 1303 also Used to determine the antenna port and/or power control parameter of the third CRS according to the signaling. Wherein, when the third transceiver module 1301 receives the port information and/or power control parameters of the antenna port of the third CRS, the signaling received by the third transceiver module 1301 may be the same type of signaling or a different type of signaling , that is, the signaling containing the port information of the antenna port of the third CRS and the signaling containing the power control parameters may be the same or different, and if they are the same type of signaling, independent signaling may be used to indicate the third CRS respectively The number of antenna ports of the third CRS and the power control parameters of the third CRS may also be included in the same signaling at the same time as the number of antenna ports of the third CRS and the power control parameters of the third CRS. The specific processing procedure of the port information and/or power control parameters of the antenna ports of the third CRS is the same as the port information and/or power control of the antenna ports of the third CRS in the description of step 901 in Embodiment 3 shown in FIG. 9 The parameters are similar and will not be repeated here.

It should be noted that the third transceiver module 1301 is used to implement the content involved in step 901 in the third embodiment shown in FIG. the content involved.

It can be understood that, after the third transceiver module 1301 receives the resource block including the first CRS and the supplementary CRS, the first demodulation module 1302 will use the first CRS and the supplementary CRS to process the data part of the information of the resource block For demodulation, since the first CRS and supplementary CRS are configured by the base station according to the time domain length and frequency domain length of the resource block, the first CRS and supplementary CRS can ensure that the data part in the resource block can be used by the first CRS and supplementary CRS CRS demodulation, and has better demodulation performance.

Example 8

The reference signal transmission method of the embodiment of the present invention has been introduced above, and the base station of the embodiment of the present invention will be introduced below, please refer to FIG. 14. FIG. 14 is a diagram of an embodiment of the base station of the embodiment of the present invention, as shown in FIG. 14 , an embodiment of the present invention provides a user equipment, which may include:

The fourth transceiver module 1401 is configured to receive resource blocks transmitted by the base station, where the resource blocks are 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 a first DM-RS, The antenna port of the first DM-RS is a UE-dedicated demodulation antenna port;

Wherein, 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 to enable the UE to obtain the antenna port information of the first DM-RS described in Embodiment 2 shown in FIG. 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. The process of configuring the first CRS is similar and will not be repeated here.

Wherein, in addition to the first DM-RS and the first CRS, the resource block received by the user equipment may also include the second CRS, the first CRS and the second CRS included in the resource block are configured by the base station, and the first CRS and The process of configuring the second CRS is similar to the process of configuring the first CRS and the second CRS for the resource block by the base station in Embodiment 2 shown in FIG. 7 , and will not be repeated here. In addition, the first CRS may be a CRS transmitted on a normal subframe, or a CRS transmitted on an MBSFN subframe.

The second demodulation module 1402 is configured to demodulate the data part of the information carried on the resource block according to the first DM-RS.

Wherein, when the resource block contains only the first DM-RS, the second demodulation module 1402 demodulates the data part of the information carried on the resource block according to the first DM-RS; RS and the first CRS, the second demodulation module 1402 demodulates the data part 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 , channel characteristic estimation, RRM measurement, CSI measurement, etc.; when the resource block contains the first DM-RS, the first CRS, and the second CRS at the same time, the second demodulation module 1402 carries on the resource block according to the first DM-RS Demodulate the data part of the information, and the specific second demodulation module 1402 can 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.

It should be noted that the information carried on the resource block includes control information and/or data information, and the information is specifically carried on a physical channel, and the physical channel includes one or a combination of the following: PDCCH, PDSCH, EPDCCH, PCFICH, PHICH, The second demodulation module 1402 may jointly demodulate the information carried on the resource block in conjunction with the first DM-RS.

Optionally, the user equipment also includes:

The second determination module 1403 is configured to determine that the 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;

and / or,

The length of the time domain 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 also used for:

Determine the frequency domain length of the resource block as P PRBs or RBGs or REs or REGs, where P is an integer not less than 1 and not greater than Q, and Q is the number of PRBs or RBGs or REs or REGs corresponding to the system bandwidth.

It can be seen that the second determining module 1403 can determine the time domain length of the resource block as M time domain symbols, or determine the time domain length of the resource block as N subframes, or a combination of the two to determine the time domain length of the resource block. 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 embodiment in the description of step 702 in the second embodiment shown in FIG. repeat.

It should be noted that the fourth transceiver module 1401 is used to implement the content involved in step 1001 in the fourth embodiment shown in FIG. the content involved.

It can be understood that after the fourth transceiver module 1401 receives the resource block containing the first DM-RS, the second demodulation module 1402 will demodulate the data part of the resource block information through the first DM-RS , 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 part in the resource block can be demodulated by the first DM-RS, and It has better demodulation performance.

Example 9

The base station and the user equipment in the embodiment of the present invention are introduced above, and the communication system using the base station and the user equipment in the embodiment of the present invention is introduced below. Please refer to FIG. 15 , which is a communication system in the embodiment of the present invention. Embodiment figure, as shown in Figure 15, the communication system may include:

The base station 1501 is configured to configure 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;

It is also used to configure a supplementary CRS for the resource block, and the antenna port of the supplementary CRS is the same as or different from the antenna port of the first CRS;

It is also used to transmit resource blocks, and the reference signal part of the resource block information includes the first CRS and the supplementary CRS;

UE1502, configured to receive resource blocks transmitted by the base station;

It is also used to demodulate the data part of the information carried on the resource block according to the first CRS and the supplementary CRS.

It can be understood that the base station 1501 in this embodiment is the same as the base station in Embodiment 5 shown in FIG. 11, that is, the base station 1501 can implement steps 301 to 303 in Embodiment 1 shown in FIG. The UE1502 is the same as the UE in Embodiment 7 shown in FIG. 13, that is, the UE can implement steps 901 and 902 in Embodiment 3 shown in FIG. The base station distributes the process of configuring resource blocks and delivering resource blocks. The three situations included in the supplementary CRS part of the delivered resource blocks are similar to the three situations included in the base station in Embodiment 5 shown in FIG. 11 . UE1502 receives resource block and the demodulation process of the data part of the resource block information according to the first CRS and the supplementary CRS in the resource block is similar to the receiving resource block and demodulation process of the UE in Embodiment 7 shown in FIG. 13 , where Neither will repeat them.

Example 10

The base station and user equipment in the embodiment of the present invention are introduced above, and another communication system using the base station and user equipment in the embodiment of the present invention is introduced below, please refer to FIG. 16 , which shows the communication system of the embodiment of the present invention An embodiment diagram of the system, as shown in Figure 16, the communication system may include:

The base station 1601 is configured to determine the length in the time domain and/or the length in the frequency domain of the resource block, where 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;

It is also used to configure the first DM-RS for the resource block, and the antenna port of the first DM-RS is a UE-dedicated demodulation antenna port;

It is also used to transmit resource blocks, and the reference signal part of the resource block information includes the first DM-RS;

UE1602, configured to receive resource blocks;

It is also used to demodulate the data part of the information carried on the resource block according to the first DM-RS.

It can be understood that the base station 1601 in this embodiment is the same as the base station in the sixth embodiment shown in FIG. 12, and the UE 1602 in this embodiment is the same as the UE in the eighth embodiment shown in FIG. Step 1001 and step 1002 in Embodiment 4 shown in Figure 10, the base station 1601 can implement steps 701 to 703 in Embodiment 2 shown in Figure 7, that is, the base station 1601 also includes the embodiment shown in Figure 12 The process of the base station in 6 to issue configuration resource blocks and deliver resource blocks, that is, the three situations of the reference signal in the delivered resource blocks are similar to the three situations included in the base station in embodiment 6 shown in FIG. 12 . The first situation is that the reference signal is the first DM-RS, the reference signal is the first DM-RS and the first CRS, and the reference signal is the first DM-RS, the first CRS and the second CRS, UE1602 receives the resource block and according to The first DM-RS in the resource block or the first DM-RS and the first CRS, or the demodulation process performed by the first DM-RS, the first CRS and the second CRS on the data part of the resource block information, and The receiving resource block and the demodulation process of the UE in Embodiment 7 shown in FIG. 13 are similar, and will not be repeated here.

The structure of the base station in the embodiment of the present invention is described below. Please refer to FIG. 17. FIG. 17 is a diagram of an embodiment of the base station in the embodiment of the present invention. At least one receiver 1702 and at least one transmitter 1703. The base station involved in this embodiment of the present invention may have more or fewer components than those shown in FIG. 17, may combine two or more components, or may have different Each component can be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application-specific integrated circuits.

Specifically, for Embodiment 5 shown in FIG. 11, the processor 1701 can realize the function of the first configuration module 1101 in Embodiment 5 shown in FIG. 11, and the combination of the receiver 1702 and the transmitter 1703 can realize The functions of the first transceiver module 1102 in Embodiment 5 shown in FIG. 11 ;

For Figure 12, the processor 1701 can realize the function of the second configuration module 1201 in Embodiment 6 shown in Figure 12, and the receiver 1702 and the transmitter 1703 can realize the function of the embodiment shown in Figure 12 Functions of the second transceiver module 1202 .

The following describes the structure of the user equipment in the embodiment of the present invention. Please refer to FIG. 18. FIG. 18 is a diagram of an embodiment of the user equipment in the embodiment of the present invention. 1801, at least one receiver 1802, and at least one transmitter 1803, the base station involved in this embodiment of the present invention may have more or fewer components than those shown in Figure 18, and two or more components may be combined, or There may be different configurations or arrangements of components, and various components may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.

Specifically, for the embodiment shown in FIG. 13 , the processor 1801 can implement the functions of the first demodulation module 1302 and the first determination module 1303 in the embodiment shown in FIG. 13 , and the receiver 1802 Combining with the transmitter 1803 can realize the function of the third transceiver module 1301 in the embodiment shown in FIG. 13 .

For FIG. 14, the processor 1801 can realize the functions of the second demodulation module 1402 and the second determination module 1403 in the embodiment shown in FIG. 14, and the combination of the receiver 1802 and the transmitter 1803 can realize the Functions of the fourth transceiver module 1401 in the embodiment are shown. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand Solution: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. spirit and scope.

Claims (42)

1. A kind of transmission method of reference signal, it is characterized in that, include: base station be resource block configure the first public reference signal CRS, the antenna port of first CRS is cell-specific antenna port, for the resource block for carrying the information transmitted between the base station and user equipment (UE), the information includes data portion and reference signal part；

   The base station is resource block configuration supplement CRS, and the antenna port of the antenna port and the first CRS of the supplement CRS is identical or different；

   The resource block is transmitted in the base station, and the reference signal part of the information of the resource block carrying includes the first CRS and supplement CRS.
2. The method according to claim 1, wherein the supplement CRS includes the 2nd CRS, the antenna port of the supplement CRS is identical as the antenna port of the first CRS；

   The base station is that resource block configuration supplement CRS includes:

   The base station configures the 2nd CRS in the resource block for the antenna port of at least one the first CRS.
3. According to the method described in claim 2, it is characterized in that, the supplement CRS further includes the 3rd CRS, the antenna port that the antenna port of the supplement CRS is the 3rd CRS, the antenna port of the 3rd CRS is identical as the antenna port of the first CRS；

   The base station is resource block configuration supplement CRS further include:

   The base station determines the time domain length and/or frequency domain length of the resource block；

   The base station determines the antenna port of the 3rd CRS of the resource block；

   The base station configures the 3rd CRS according to the antenna port that time domain length and/or frequency domain length are at least one the 3rd CRS in the resource block.
4. The method according to claim 1, wherein the supplement CRS includes the 3rd CRS, the antenna port that the antenna port of the supplement CRS is the 3rd CRS, the antenna port of the 3rd CRS is identical as the antenna port of the first CRS；

   The base station is that resource block configuration supplement CRS includes:

   The base station determines the time domain length and/or frequency domain length of the resource block；

   The base station determines the antenna port of the 3rd CRS of the resource block；

   The base station in the resource block according to time domain length and/or frequency domain length be at least one described the The antenna port of three CRS configures the 3rd CRS.
5. The method according to claim 3 or 4, which is characterized in that the base station determines in the time domain length and/or frequency domain length of the resource block that the base station determines that the time domain length of the resource block includes:

   The base station determines that the time domain length of the resource block is M time-domain symbol, and the M is the integer not less than 1 and no more than 14；

   And/or

   The base station determines that the time domain length of the resource block is N number of subframe, and the N is the integer not less than 1 and no more than 10；

   The base station determines that the frequency domain length of the resource block includes:

   The base station determines that the frequency domain length of the resource block is P Physical Resource Block PRB or resource block group RBG or resource unit RE or resource unit group REG, the P is the integer not less than 1 and no more than Q, and the Q is the corresponding PRB number of system bandwidth or RBG number or RE number or REG number.
6. According to the method for claim 5, it is characterized in that, the base station determines that the time domain length of the resource block is M time-domain symbol, when the M is the integer not less than 1 and no more than 3, the base station configures the 3rd CRS according to the antenna port that time domain length and/or frequency domain length are at least one the 3rd CRS in the resource block, comprising:

   The base station is that the antenna port of the 3rd CRS of each of the antenna port of at least one the 3rd CRS configures 1 RE in each PRB in the resource block；

   Or,

   When the M is the integer not less than 4 and no more than 7, the base station configures the 3rd CRS according to the antenna port that time domain length and/or frequency domain length are at least one the 3rd CRS in the resource block, comprising:

   The base station is that the antenna port of the 3rd CRS of each of the antenna port of at least one the 3rd CRS configures 2 RE in each PRB in the resource block；

   Or,

   When the M is the integer not less than 8 and no more than 14, the base station configures the 3rd CRS according to the antenna port that time domain length and/or frequency domain length are at least one the 3rd CRS in the resource block, comprising:

   The base station is at least one described described 3rd CRS in each PRB in the resource block The antenna port of the 3rd CRS of each of antenna port configures 4 RE.
7. Method according to any one of claim 3 to 6, which is characterized in that the method also includes:

   The base station sends the port information and/or power contorl parameters for determining the antenna port of the 3rd CRS by signaling, and the signaling is radio resource control RRC signaling or media access control MAC signaling or physical layer signaling.
8. A kind of transmission method of reference signal characterized by comprising

   Base station determines the time domain length and/or frequency domain length of resource block, and for the resource block for carrying the information transmitted between the base station and user equipment (UE), the information includes data portion and reference signal part；

   The base station is that the antenna port that the resource block configures the first demodulated reference signal DM-RS, the first DM-RS is UE special demodulating antenna port；

   The resource block is transmitted in the base station, and the reference signal part of the information of the resource block carrying includes the first DM-RS.
9. According to the method described in claim 8, the base station determines that the time domain length of resource block includes: it is characterized in that, the base station determines in the time domain length and/or frequency domain length of resource block

   The base station determines that the time domain length of resource block is M time-domain symbol, and the M is the integer not less than 1 and no more than 14；

   And/or

   The base station determines that the time domain length of resource block is N number of subframe, and the N is the integer not less than 1 and no more than 10；

   The base station determines that the frequency domain length of resource block includes:

   The base station determines that the frequency domain length of resource block is P Physical Resource Block PRB or resource block group RBG or resource unit RE or resource unit group REG, the P is not less than 1 and to be not more than the integer of Q, and the Q is the corresponding PRB number of system bandwidth or RBG number or RE number or REG number.
10. Method according to claim 8 or claim 9, which is characterized in that the base station is that the resource block configures the first DM-RS, comprising:

    The base station configures Y RE in each PRB in the resource block for the antenna port of the first DM-RS of each of the antenna port of at least one the first DM-RS, wherein, Y is the at most supported antenna port number of the first DM-RS, and the first DM-RS of different antennae port is believed using different references First DM-RS of number sequence, different antennae port occupies identical running time-frequency resource.
11. The method according to any one of claim 8 to 10, which is characterized in that the method also includes:

    The base station is that the antenna port that the resource block configures the first public reference signal CRS, the first CRS is cell-specific antenna port；

    The resource block is transmitted in the base station, and the reference signal part of the resource block includes that the first DM-RS includes:

    The resource block is transmitted in the base station, and the reference signal part of the resource block includes the first DM-RS and the first CRS.
12. According to the method for claim 11, which is characterized in that the method also includes:

    The base station is that the resource block configures the 2nd CRS according to the antenna port of the first CRS described at least one；

    The resource block is transmitted in the base station, and the reference signal part of the resource block includes the first DM-RS and the first CRS includes:

    The resource block is transmitted in the base station, and the reference signal part of the resource block includes the first DM-RS, the first CRS and the 2nd CRS.
13. A kind of transmission method of reference signal characterized by comprising

    User equipment (UE) receives the resource block for carrying the first public reference signal CRS and supplementing CRS of base station transmission, wherein, the resource block is for carrying the information transmitted between the base station and user equipment (UE), the information includes data portion and reference signal part, the reference signal part includes the first CRS and supplement CRS, the antenna port of first CRS is cell-specific antenna port, and the antenna port of the antenna port and the first CRS of the supplement CRS is identical or different；

    The UE demodulates the data portion of the information carried on the resource block according to the first CRS and the supplement CRS.
14. According to the method for claim 13, it is characterized by: the supplement CRS includes the 2nd CRS and/or the 3rd CRS, the antenna port of 2nd CRS is identical as the antenna port of the first CRS, and the antenna port of the 3rd CRS is not identical as the antenna port of the first CRS.
15. Method described in 3 or 14 according to claim 1, which is characterized in that the method also includes,

    The UE determines the time domain length and/or frequency domain length of the resource block, wherein the UE is determined 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 symbol, and the M is the integer not less than 1 and no more than 14；

    And/or

    The base station determines that the time domain length of resource block is N number of subframe, and the N is the integer not less than 1 and no more than 10；

    The UE determines that the frequency domain length of the resource block includes:

    The UE determines that the frequency domain length of the resource block is P Physical Resource Block PRB or resource block group RBG or resource unit RE or resource unit group REG, the P is the integer not less than 1 and no more than Q, and the Q is the corresponding PRB number of system bandwidth or RBG number or RE number or REG number.
16. Method according to claim 14 or 15, which is characterized in that the method also includes:

    It is radio resource control RRC signaling or media access control MAC signaling or physical layer signaling that the UE, which receives the port information for the antenna port for determining the 3rd CRS that the base station is sent and/or the signaling of power contorl parameters, the signaling,；

    The UE determines the antenna port and/or the power contorl parameters of the 3rd CRS according to the signaling.
17. A kind of transmission method of reference signal characterized by comprising

    User equipment (UE) receives the resource block of base station transmission, wherein, the resource block is for carrying the information transmitted between the base station and user equipment (UE), the information includes data portion and reference signal part, the reference signal part includes the first DM-RS, and the antenna port of the first DM-RS is UE special demodulating antenna port；

    The UE demodulates the data portion of the information carried on the resource block according to the first DM-RS.
18. According to the method for claim 17, which is characterized in that the method also includes the UE determines the time domain length and/or frequency domain length of the resource block, wherein 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 symbol, and the M is the integer not less than 1 and no more than 14；

    And/or

    The base station determines that the time domain length of resource block is N number of subframe, and the N is the integer not less than 1 and no more than 10；

    The UE determines that the frequency domain length of the resource block includes:

    The UE determines that the frequency domain length of the resource block is P Physical Resource Block PRB or resource block group RBG or resource unit RE or resource unit group REG, the P is the integer not less than 1 and no more than Q, and the Q is the corresponding PRB number of system bandwidth or RBG number or RE number or REG number.
19. Method described in 7 or 18 according to claim 1, which is characterized in that the method also includes:

    The reference signal part further includes the first CRS, also carries the first CRS on the resource block；

    The UE carries out demodulation to the data portion of the information carried on the resource block according to the first DM-RS

    The UE demodulates the data portion of the information carried on the resource block according to the first DM-RS and the first CRS.
20. Method described in 7 or 18 according to claim 1, which is characterized in that the method also includes:

    The reference signal part further includes the first CRS and the 2nd CRS, also carries the first CRS and the 2nd CRS on the resource block；

    The UE carries out demodulation to the information carried on the resource block according to the first DM-RS

    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 2nd CRS.
21. A kind of base station characterized by comprising

    First configuration module, for configuring the first public reference signal CRS for resource block, the antenna port of first CRS is cell-specific antenna port, and for the resource block for carrying the information transmitted between the base station and user equipment (UE), the information includes data portion and reference signal part；

    First configuration module is also used to configure supplement CRS for the resource block, and the antenna port of the antenna port and the first CRS of the supplement CRS is identical or different；

    First transceiver module is used for transmission the resource block, and the reference signal part of the information of the resource block carrying includes the first CRS and supplement CRS.
22. Base station according to claim 21, which is characterized in that the supplement CRS includes the 2nd CRS, and the antenna port of the supplement CRS is identical as the antenna port of the first CRS；

    First configuration module is specifically used for:

    The 2nd CRS is configured in the resource block for the antenna port of at least one the first CRS.
23. Base station according to claim 22, which is characterized in that the supplement CRS further includes the 3rd CRS, the antenna port that the antenna port of the supplement CRS is the 3rd CRS, and the antenna port of the 3rd CRS is not identical as the antenna port of the first CRS；

    First configuration module is specifically used for:

    Determine the time domain length and/or frequency domain length of the resource block；

    Determine the antenna port of the 3rd CRS of the resource block；

    The 3rd CRS is configured according to the antenna port that time domain length and/or frequency domain length are at least one the 3rd CRS in the resource block.
24. Base station according to claim 21, which is characterized in that the supplement CRS includes the 3rd CRS, the antenna port that the antenna port of the supplement CRS is the 3rd CRS, and the antenna port of the 3rd CRS is not identical as the antenna port of the first CRS；

    First configuration module is specifically used for:

    Determine the time domain length and/or frequency domain length of the resource block；

    Determine the antenna port of the 3rd CRS of the resource block；

    The 3rd CRS is configured according to the antenna port that time domain length and/or frequency domain length are at least one the 3rd CRS in the resource block.
25. The base station according to claim 23 or 24, which is characterized in that first configuration module is specifically used for:

    The time domain length for determining the resource block is M time-domain symbol, and the M is the integer not less than 1 and no more than 14；

    And/or

    The time domain length for determining the resource block is N number of subframe, and the N is the integer not less than 1 and no more than 10；

    First configuration module also particularly useful for:

    The frequency domain length for determining the resource block is P Physical Resource Block PRB or resource block group RBG or resource unit RE or resource unit group REG, the P are the integer not less than 1 and no more than Q, and the Q is the corresponding PRB number of system bandwidth or RBG number or RE number or REG number.
26. Base station according to claim 25, which is characterized in that the time domain length of the resource block For M time-domain symbol, first configuration module is specifically used for:

    The antenna port for being the 3rd CRS of each of the antenna port of at least one the 3rd CRS when the M is the integer not less than 1 and no more than 3, in each PRB in the resource block configures 1 RE；

    Or,

    The antenna port for being the 3rd CRS of each of the antenna port of at least one the 3rd CRS when the M is the integer not less than 4 and no more than 7, in each PRB in the resource block configures 2 RE；

    Or,

    The antenna port for being the 3rd CRS of each of the antenna port of at least one the 3rd CRS when the M is the integer not less than 8 and no more than 14, in each PRB in the resource block configures 4 RE.
27. The method according to any one of claim 23 to 26, which is characterized in that first transceiver module is also used to:

    The port information and/or power contorl parameters for determining the antenna port of the 3rd CRS are sent by signaling, the signaling is radio resource control RRC signaling or media access control MAC signaling or physical layer signaling.
28. A kind of base station characterized by comprising

    Second configuration module, for determining the time domain length and/or frequency domain length of resource block, for the resource block for carrying the information transmitted between the base station and user equipment (UE), the information includes data portion and reference signal part；

    It is UE special demodulating antenna port that second configuration module, which is also used to configure the antenna port of the first demodulated reference signal DM-RS, the first DM-RS for the resource block,；

    Second transceiver module is used for transmission the resource block, and the reference signal part of the information of the resource block carrying includes the first DM-RS.
29. Base station according to claim 28, which is characterized in that second configuration module is specifically used for:

    The time domain length for determining the resource block is M time-domain symbol, and the M is the integer not less than 1 and no more than 14；

    And/or

    The time domain length for determining the resource block is N number of subframe, and the N is the integer not less than 1 and no more than 10；

    Second configuration module also particularly useful for:

    The frequency domain length for determining the resource block is P Physical Resource Block PRB or resource block group RBG or resource unit RE or resource unit group REG, the P are the integer not less than 1 and no more than Q, and the Q is the corresponding PRB number of system bandwidth or RBG number or RE number or REG number.
30. The base station according to claim 28 or 29, which is characterized in that the configuration module is specifically used for:

    Antenna port in each PRB in the resource block for the first DM-RS of each of the antenna port of at least one the first DM-RS configures Y RE, wherein, Y is the at most supported antenna port number of the first DM-RS, first DM-RS of different antennae port uses different reference signal sequences, and the first DM-RS of different antennae port occupies identical running time-frequency resource.
31. The base station according to any one of claim 28 to 30, which is characterized in that second configuration module is also used to:

    The antenna port that the first public reference signal CRS, the first CRS is configured for the resource block is cell-specific antenna port；

    Second configuration module is specifically used for:

    The resource block is transmitted, the reference signal part of the resource block includes the first DM-RS and the first CRS.
32. Base station according to claim 31, which is characterized in that second configuration module is also used to:

    It is that the resource block configures the 2nd CRS according to the antenna port of the first CRS described at least one；

    Second configuration module is specifically used for:

    The resource block is transmitted, the reference signal part of the resource block includes the first DM-RS, the first CRS and the 2nd CRS.
33. A kind of user equipment characterized by comprising

    Third transceiver module, for receiving the resource block for carrying the first public reference signal CRS and supplementing CRS of base station transmission, wherein the resource block is for carrying between the base station and user equipment (UE) The information of transmission, the information includes data portion and reference signal part, the reference signal part includes the first CRS and supplement CRS, the antenna port of first CRS is cell-specific antenna port, and the antenna port of the antenna port and the first CRS of the supplement CRS is identical or different；

    First demodulation module, for being demodulated according to the first CRS and the supplement CRS to the data portion of the information carried on the resource block.
34. User equipment according to claim 33, it is characterized by: the supplement CRS includes the 2nd CRS and/or the 3rd CRS, the antenna port of 2nd CRS is identical as the antenna port of the first CRS, and the antenna port of the 3rd CRS is not identical as the antenna port of the first CRS.
35. The user equipment according to claim 33 or 34, which is characterized in that the user equipment further include:

    First determining module, for determining that the time domain length of the resource block is M time-domain symbol, the M is the integer not less than 1 and no more than 14；

    And/or

    For determining that the time domain length of resource block is N number of subframe, the N is the integer not less than 1 and no more than 10；

    First determining module is also used to:

    The frequency domain length for determining the resource block is P Physical Resource Block PRB or resource block group RBG or resource unit RE or resource unit group REG, the P are the integer not less than 1 and no more than Q, and the Q is the corresponding PRB number of system bandwidth or RBG number or RE number or REG number.
36. The user equipment according to claim 34 or 35, which is characterized in that the third transceiver module is also used to:

    Receiving the port information for the antenna port for determining the 3rd CRS that the base station is sent and/or the signaling of power contorl parameters, the signaling is radio resource control RRC signaling or media access control MAC signaling or physical layer signaling；

    First determining module is also used to:

    The antenna port and/or the power contorl parameters of the 3rd CRS are determined according to the signaling.
37. A kind of user equipment characterized by comprising

    4th transceiver module, for receiving the resource block of base station transmission, wherein for the resource block for carrying the information transmitted between the base station and user equipment (UE), the information includes data portion and reference signal Part, the reference signal part include the first DM-RS, and the antenna port of the first DM-RS is UE special demodulating antenna port；

    Second demodulation module, for being demodulated according to the first DM-RS to the data portion of the information carried on the resource block.
38. The base station according to claim 37, which is characterized in that the user equipment further include:

    Second determining module, for determining that the time domain length of the resource block is M time-domain symbol, the M is the integer not less than 1 and no more than 14；

    And/or

    For determining that the time domain length of resource block is N number of subframe, the N is the integer not less than 1 and no more than 10；

    Second determining module is also used to:

    The frequency domain length for determining the resource block is P Physical Resource Block PRB or resource block group RBG or resource unit RE or resource unit group REG, the P are the integer not less than 1 and no more than Q, and the Q is the corresponding PRB number of system bandwidth or RBG number or RE number or REG number.
39. The user equipment according to claim 37 or 38, which is characterized in that the reference signal part further includes the first CRS, also carries the first CRS on the resource block；

    Second demodulation module is specifically used for:

    The data portion of the information carried on the resource block is demodulated according to the first DM-RS and the first CRS.
40. The user equipment according to claim 37 or 38, which is characterized in that the reference signal part further includes the first CRS and the 2nd CRS, also carries the first CRS and the 2nd CRS on the resource block；

    Second demodulation module is specifically used for:

    The data portion of the information carried on the resource block is demodulated according to the first DM-RS, the first CRS and the 2nd CRS.
41. A kind of communication system, which is characterized in that the system comprises:

    Base station, for configuring the first public reference signal CRS for resource block, the antenna port of first CRS is cell-specific antenna port, and for the resource block for carrying the information transmitted between the base station and user equipment (UE), the information includes data portion and reference signal part；

    It is also used to configure supplement CRS for the resource block, the antenna port of the antenna port and the first CRS of the supplement CRS is identical or different；

    It is also used to transmit the resource block, the reference signal part of the information of the resource block includes the first CRS and supplement CRS；

    UE, for receiving the resource block of the base station transmission；

    It is also used to demodulate the data portion of the information carried on the resource block according to the first CRS and the supplement CRS.
42. A kind of communication system, which is characterized in that the system comprises:

    Base station, for determining the time domain length and/or frequency domain length of resource block, for the resource block for carrying the information transmitted between the base station and user equipment (UE), the information includes data portion and reference signal part；

    Being also used to configure the antenna port of the first demodulated reference signal DM-RS, the first DM-RS for the resource block is UE special demodulating antenna port；

    It is also used to transmit the resource block, the reference signal part of the information of the resource block includes the first DM-RS；

    UE, for receiving the resource block；

    It is also used to demodulate the data portion of the information carried on the resource block according to the first DM-RS.