CN111585626A

CN111585626A - Method and device used in UE (user equipment) and base station for multi-antenna transmission

Info

Publication number: CN111585626A
Application number: CN202010390380.XA
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2016-11-27
Filing date: 2016-11-27
Publication date: 2020-08-25
Also published as: CN108123739A; CN108123739B; CN111585625B; CN111585625A

Abstract

The invention provides a UE for multi-antenna transmission, a method and a device in a base station. The UE firstly receives Q second-type wireless signals; and then transmits the third information. The Q second-type wireless signals are respectively sent by Q antenna port groups, and the antenna port groups comprise positive integer antenna ports. The third information is used to determine a first antenna port. The first antenna port corresponds to a first channel quality, the first channel quality not being lower than a sum of a reference channel quality plus a target threshold. The invention effectively improves the beam scanning efficiency under the condition of limited radio frequency link resources.

Description

Method and device used in UE (user equipment) and base station for multi-antenna transmission

The present application is a divisional application of the following original applications:

application date of the original application: 2016.11.27

- -application number of the original application: 201611058134.4

The invention of the original application is named: method and device used in UE (user equipment) and base station for multi-antenna transmission

Technical Field

The present invention relates to a scheme for multi-antenna transmission in a wireless communication system.

Background

Massive MIMO becomes a research hotspot of next generation mobile communication. In massive MIMO, multiple antennas form a narrow beam pointing in a specific direction by beamforming to improve communication quality.

Hybrid beamforming combining analog beamforming and digital precoding has become an important research direction for NR (New radio technology) systems, as discussed in 3GPP (3rd Generation Partner Project) RAN1(radio access Network).

Since analog beamforming is a wideband operation, beam scanning (beam sweeping) is used for beam selection and channel state information reporting, i.e., using different analog beamforming vectors for reference signals for beam selection at different time units. How to effectively improve the efficiency of beam scanning under the condition of limited radio frequency link resources is an urgent problem to be solved.

Disclosure of Invention

The present invention discloses a solution to the above problems. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE of the present application may be applied to the base station, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.

The invention discloses a method used in UE (User Equipment) of multi-antenna transmission, which comprises the following steps:

-a. receiving Q second type radio signals;

-step b.

The Q second-type wireless signals are respectively sent by Q antenna port groups, and the antenna port groups comprise positive integer antenna ports. And Q is a positive integer. The third information is used to determine a first antenna port. The first antenna port is one of a first antenna port group, which is one of the Q antenna port groups. The first antenna port group includes P2 of the antenna ports, the P2 being a positive integer greater than 1. The second wireless signal is one of the Q second-type wireless signals. The second wireless signal is transmitted by the first antenna port group. The first antenna port corresponds to a first channel quality, the first channel quality not being lower than a sum of a reference channel quality plus a target threshold.

As one embodiment, the target threshold is a default.

For one embodiment, the target threshold is configurable.

As an embodiment, the target threshold is informed by the base station.

As an embodiment, the target threshold is calculated by the UE.

As an embodiment, the target threshold is equal to the first channel quality minus the reference channel quality.

As one example, the unit of the channel quality is dBm and the unit of the target threshold is dB.

As an example, the unit of the channel quality is dB, and the unit of the target threshold is dB.

As one embodiment, the unit of the channel quality is milliwatts and the unit of the target threshold is milliwatts.

As one embodiment, the target threshold is in dB.

As one embodiment, the target threshold is 0.

As an embodiment, the reference channel quality is a maximum value of channel qualities corresponding to antenna ports other than the first antenna port in the first antenna port group.

As an embodiment, the reference channel quality is an average value of channel qualities corresponding to antenna ports other than the first antenna port in the first antenna port group.

As an embodiment, the reference channel quality is a maximum value of channel qualities corresponding to antenna ports other than the first antenna port in the Q antenna port groups.

As an embodiment, the reference channel quality is an average value of channel qualities corresponding to antenna ports other than the first antenna port in the Q antenna port groups.

As an embodiment, the target threshold ensures that the channel quality corresponding to the first antenna port is significantly better than the channel quality corresponding to the other antenna ports in the first antenna port group, i.e. the other antenna ports in the first antenna port group are approximately orthogonal to the UE.

As an embodiment, the reference channel quality is notified by a base station.

As one embodiment, the wireless signal is a multicarrier symbol.

As one embodiment, the wireless signal is a single carrier symbol.

As an embodiment, the wireless signal adopts an OFDM (Orthogonal Frequency division multiplexing) modulation scheme.

As one example, the wireless signal employs FBMC (Filter Bank MultiCarrier) symbols.

As an embodiment, the wireless signal adopts a modulation scheme of SC-FDMA (Single-carrier Frequency-Division Multiple Access).

As an embodiment, one of the antenna ports is formed by superimposing a plurality of physical antennas through antenna Virtualization (Virtualization), and mapping coefficients of the plurality of physical antennas to the antenna port form a beamforming vector.

As one embodiment, one of the antenna ports corresponds to and only one beamforming vector.

As an example, the beamforming vectors corresponding to any two different antenna ports cannot be assumed to be the same.

As an example, the small scale characteristics of the wireless channel experienced by a signal transmitted by one antenna port cannot be used to infer the small scale characteristics of the wireless channel experienced by a signal transmitted by another antenna port.

As an embodiment, the P2 antenna ports respectively correspond to P2 beamforming vectors, the P2 antenna ports are respectively used for transmitting P2 wireless sub-signals, and the P2 wireless sub-signals constitute the second wireless signal.

As an embodiment, the wireless sub-signal is a reference signal.

As an example, one antenna port is associated with one reference signal.

As one embodiment, one antenna port corresponds to and only one reference signal.

As one embodiment, one reference signal corresponds to and only one beamforming vector.

As an embodiment, the first reference signal and the second reference signal are any two reference signals, and the first reference signal and the second reference signal correspond to mutually orthogonal air interface resources. The air interface resource comprises at least one of { time domain resource, frequency domain resource and code domain resource }.

As an embodiment, the pattern of the reference signals within one subframe reuses the pattern of CSI-RS within one subframe.

As one embodiment, the reference signal is a CSI-RS.

As one embodiment, the code domain resource is an Orthogonal Cover Code (OCC).

As an embodiment, the code domain resource is one of { Zadoff-Chu sequence, pseudo random sequence }.

As an embodiment, the Q antenna port groups are respectively used for transmitting Q reference signal groups, and the reference signal group includes a positive integer number of reference signals.

As one embodiment, the first reference signal group is one of the Q reference signal groups, and the second reference signal group is another one of the Q reference signal groups. The first reference signal is one reference signal of the first reference signal group. The second reference signal is one reference signal of the second reference signal group. The first reference signal is transmitted at a first time unit. The second reference signal is transmitted in a second time unit. The resource mapping pattern corresponding to the first reference signal in the first time unit is the same as the resource mapping pattern corresponding to the second reference signal in the second time unit.

As an embodiment, the number of antenna ports included in any two antenna port groups of the Q antenna port groups is the same.

As an embodiment, any one of the Q antenna port groups includes P2 antenna ports.

As an embodiment, any one of the Q antenna port groups corresponds to P2 reference signals.

As an embodiment, the number of antenna ports included in a plurality of antenna port groups in the Q antenna port groups is different.

As an embodiment, time domain resources occupied by any two antenna port groups of the Q antenna port groups are orthogonal.

As an embodiment, time domain resources occupied by any two antenna ports in one antenna port group of the Q antenna port groups are orthogonal.

As an embodiment, time domain resources occupied by the Q antenna port groups are overlapped.

As an embodiment, there is at least one given moment occupied by Q antenna ports, said Q antenna ports belonging to said Q antenna port groups, respectively.

As one embodiment, Q is greater than 1.

As an example, Q is equal to 1.

As an embodiment, the third information is transmitted on a physical layer control channel.

As an embodiment, the third information is transmitted on a physical layer data channel.

As an embodiment, the way in which the third information is used to determine the first antenna port is: the third information indicates air interface resources of the second wireless signal.

As an embodiment, the way in which the third information is used to determine the first antenna port is: the third information indicates time domain resources of the second wireless signal

As an embodiment, the way in which the third information is used to determine the first antenna port is: the third information includes an index of the second wireless signal.

As an embodiment, the way in which the third information is used to determine the first antenna port is: the third information includes an index of the first antenna port group, and the first antenna port group includes only the first antenna port.

As an embodiment, the way in which the third information is used to determine the first antenna port is: the third information includes an index of the first antenna port group and an index of the first antenna port in the first antenna port group.

As an embodiment, the way in which the third information is used to determine the first antenna port is: the third information includes an index of the first antenna port.

As an embodiment, the channel Quality includes at least one of { RSRP (Reference Signal Receiving power), RSRQ (Reference Signal Receiving Quality), SINR (Signal Interference Noise Ratio) }.

As an embodiment, a manner of the first antenna port corresponding to the first channel quality is: the first reference signal is the reference signal corresponding to the first antenna port, and is used for determining the first channel quality, which is a result of channel measurement performed by the UE according to the first reference signal.

As an embodiment, the first channel quality is a maximum value of channel qualities corresponding to all antenna ports in the Q antenna port groups.

As an embodiment, the first channel quality is one of several better channel quality values among the channel quality values corresponding to all antenna ports in the Q antenna port groups.

As an embodiment, the first channel quality is a maximum value of channel qualities corresponding to all antenna ports in the first antenna port group.

As an embodiment, the first channel quality is one of several better channel quality values among the channel quality values corresponding to all antenna ports in the first antenna port group.

As an example, the target threshold value is related to the P2.

Specifically, according to one aspect of the present invention, the method further comprises the following steps:

-step c. receiving L first type radio signals;

-step d.

Wherein, the L first-type wireless signals are respectively transmitted by L antenna port groups. The target first type of wireless signal is one of the L first type of wireless signals. The target antenna port group is the antenna port group of the L antenna port groups for transmitting the target first type of wireless signal. The second information is used to determine the target antenna port group from the L antenna port groups. The L antenna port groups are associated with at least one of { the first antenna port group, the first antenna port }.

As an embodiment, the L antenna port groups respectively transmit L reference signal groups.

As an embodiment, the pattern of the reference signal groups within one subframe reuses the pattern of CSI-RS within one subframe.

As one embodiment, the reference signal group is composed of CSI-RSs.

In one embodiment, the sequence corresponding to the reference signal includes at least one of a { Zadoff-Chu sequence, a pseudo-random sequence }.

As an embodiment, the number of antenna ports included in any two antenna port groups of the L antenna port groups is the same.

As an embodiment, the number of antenna ports included in a plurality of antenna port groups in the L antenna port groups is different.

As an embodiment, the time domain resources allocated to any two antenna port groups in the L antenna port groups are orthogonal.

As an embodiment, time domain resources occupied by any two antenna ports in one antenna port group of the L antenna port groups are orthogonal.

As an embodiment, time domain resources occupied by the L antenna port groups are overlapped.

As an embodiment, there is at least one given time occupied by L antenna ports, which belong to the L antenna port groups, respectively.

As an embodiment, the target antenna port group is one antenna port group with the best channel quality among the L antenna port groups.

As an embodiment, the target antenna port group is one antenna port group of a plurality of antenna port groups with better channel quality among the L antenna port groups.

As an embodiment, the target antenna port group is one of the antenna port groups of the L antenna port groups whose channel quality is higher than a first threshold.

For one embodiment, the first threshold is configurable.

As an embodiment, the first threshold is notified by the base station.

As an embodiment, the first threshold is a default.

As an embodiment, measurements for one reference signal group are used to determine the channel quality of the corresponding antenna port group.

As an embodiment, the second information is used to determine the target antenna port group from the L antenna port groups by: the second information indicates air interface resources of the first wireless signal.

As an embodiment, the second information is used to determine the target antenna port group from the L antenna port groups by: the second information indicates time domain information of the first wireless signal.

As an embodiment, the second information is used to determine the target antenna port group from the L antenna port groups by: the second information includes a number of the first wireless signal.

As an embodiment, the second information is used to determine the target antenna port group from the L antenna port groups by: the second information includes a number of the target antenna port group.

As an embodiment, the second information is used to determine the target antenna port group from the L antenna port groups by: the second information includes the number of antenna ports within the target antenna port group.

For one embodiment, the second information is transmitted on a physical layer control channel.

For one embodiment, the second information is transmitted on a physical layer data channel.

As an embodiment, the L antenna port groups are implicitly determined by the first antenna port.

As an embodiment, the beam direction corresponding to the L antenna port groups is associated with a beam direction corresponding to one of { the first antenna port group, the first antenna port }.

As an embodiment, one beam direction corresponding to at least one antenna port in any one of the L antenna port groups is one of beam directions corresponding to one of { the first antenna port group, the first antenna port }.

As an embodiment, one analog beam direction corresponding to at least one antenna port in any one of the L antenna port groups is one of beam directions corresponding to one of { the first antenna port group, the first antenna port }.

As an embodiment, a beam direction corresponding to at least one antenna port in any one of the L antenna port groups is within a coverage area of a beam corresponding to one of { the first antenna port group, the first antenna port }.

As an embodiment, one beam direction is the direction of one line of sight (boresight) of the antenna array.

As an embodiment, the antenna array corresponds to one line of sight.

As one embodiment, the antenna array corresponds to a plurality of lines of sight.

As an embodiment, a line of sight refers to a direction corresponding to a maximum antenna gain of the antenna array.

As an embodiment, the number of directions corresponding to the maximum antenna gain of the antenna array is greater than 1.

As an embodiment, one beam direction is the central direction of one main lobe of the antenna array.

As an embodiment, the antenna array corresponds to a plurality of main lobes.

As an embodiment, the time domain resource occupied by at least one antenna port in any one of the L antenna port groups is implicitly determined by the time domain resource occupied by the first antenna port group.

As an embodiment, the time domain resource occupied by at least one antenna port in any one of the L antenna port groups and the time domain resource occupied by the first antenna port group are continuous.

As an embodiment, the frequency domain resource occupied by at least one antenna port in any one of the L antenna port groups is implicitly determined by the frequency domain resource occupied by one of { the first antenna port group, the first antenna port }.

As an embodiment, a frequency domain unit occupied by at least one antenna port in any one of the L antenna port groups is the same as a frequency domain unit occupied by one of the { the first antenna port group, the first antenna port }, and the frequency domain unit is composed of Z consecutive subcarriers. As an example, Z is 12.

As an embodiment, the second information and the third information are for a same CSI Process (Process).

Specifically, according to an aspect of the present invention, the step D further includes the steps of:

-d1. sending the first information.

Wherein the first information is used to determine at least one of { first modulation scheme, first coding rate, first channel quality indication }. Measurements for a first wireless signal transmitted by P1 antenna ports are used to determine the first information, the P1 being a positive integer. The calculation of the first information assumes that the transmission power of the antenna port is increased by a first ratio. The P1 antenna ports are associated with at least one of the first antenna port group, the first antenna port. The first wireless signal is the target first type wireless signal, and the P1 antenna ports form the target antenna port group; or the first wireless signal is part of the target first type of wireless signal, the P1 antenna ports being a subset of the target set of antenna ports.

As an embodiment, the first information and the second information belong to one Uplink Control Indication (UCI).

As an embodiment, the first information and the third information are for a same CSI Process (Process).

As an embodiment, the first wireless signal is the target first type wireless signal, the P1 antenna ports form the target antenna port group, and the UE performs channel measurement for all antenna ports in the target antenna port group, where the channel measurement is used to determine the first information.

As an embodiment, the first wireless signal is part of the target first type of wireless signal, the P1 antenna ports are a subset of the target antenna port group, the UE makes channel measurements for the P1 antenna ports within the target antenna port group, the channel measurements are used to determine the first information.

As an embodiment, the antenna ports of the target antenna port group other than the P1 antenna ports are used by other UEs to determine channel quality indications associated with the other UEs.

For one embodiment, the antenna ports of the target antenna port group other than the P1 antenna ports are used for transmitting data.

As an embodiment, the P1 antenna ports respectively correspond to P1 transmit beamforming vectors.

For one embodiment, each of the P1 antenna ports corresponds to one beam direction.

For one embodiment, one of the P1 antenna ports corresponds to a plurality of beam directions.

As an embodiment, one antenna port of the P1 antenna ports corresponds to N1 beam directions, the first antenna port corresponds to P1 beam directions, one beam direction of the N1 beam directions is one beam direction of the P1 beam directions, and the P1 antenna ports corresponds to the P1 beam directions of the first antenna port.

As one example, the N1 is equal to the P2.

The above-mentioned embodiments save the air interface resources occupied by the reference signals sent by the P1 antenna ports, or improve the efficiency of beam scanning. Further, the base station determines a useful beam direction for the UE among the P2 beam directions according to the third information.

As an embodiment, at least one of the P1 antenna ports corresponds to a transmission beamforming vector generated by superimposing a plurality of first type transmission beamforming vectors.

As an embodiment, one first type transmit beamforming vector is used to form one beam direction, and a superposition of a plurality of first type transmit beamforming vectors may be used to form a plurality of beam directions.

As one embodiment, the first type of transmit beamforming vector is a Discrete Fourier (DFT) vector.

As an example, the first type of transmit beamforming vector is a Kronecker product of two DFT vectors.

As an embodiment, the two DFT vectors correspond to a horizontal direction and a vertical direction, respectively.

As an embodiment, the first type of transmit beamforming vector is used to form a beam direction pair. The pair of beam directions corresponds to two beam directions.

As an embodiment, the first type of transmit beamforming vector is a concatenation of two second type of transmit beamforming vectors.

As an embodiment, the two second-type transmit beamforming vectors correspond to two antenna polarization directions, respectively.

As an embodiment, one of the two second type transmission beamforming vectors is a result of phase shifting of the other second type transmission beamforming vector.

As an embodiment, the second type of transmit beamforming vector is a Kronecker product of two DFT vectors.

As an embodiment, the first type of transmit beamforming vector is a concatenation of a second type of transmit beamforming vector and N zero vectors, where N is a positive integer. All elements of the second type of transmit beamforming vector are non-zero.

As an embodiment, the P1 antenna ports are implicitly determined by the first antenna port indicated by the third information.

As an embodiment, a subset of the beam directions corresponding to the P1 antenna ports is associated with the beam direction corresponding to one of { the first antenna port group, the first antenna port }.

As an embodiment, the subset of beam directions corresponding to the P1 antenna ports is a subset of beam directions corresponding to one of the { the first antenna port group, the first antenna port }.

As an embodiment, one analog beam direction corresponding to the P1 antenna ports is a beam direction corresponding to one of { the first antenna port group, the first antenna port }.

As an embodiment, a beam direction corresponding to the P1 antenna ports is within a coverage area of a beam corresponding to one of { the first antenna port group, the first antenna port }.

As an embodiment, the time domain resources occupied by the P1 antenna ports are implicitly determined by the time domain resources occupied by the first antenna port group.

As an embodiment, the time domain resources occupied by the P1 antenna ports and the time domain resources occupied by the first antenna port group are continuous.

As an embodiment, the frequency domain resources occupied by the P1 antenna ports are implicitly determined by the frequency domain resources occupied by one of the { the first antenna port group, the first antenna port }.

As an embodiment, the frequency domain unit occupied by the P1 antenna ports is the same as the frequency domain unit occupied by one of the { the first antenna port group, the first antenna port }, and the frequency domain unit consists of Z consecutive subcarriers.

As an embodiment, the P1 antenna ports correspond to T1 RF chains, and the T1 is a positive integer greater than or equal to 1

For one embodiment, a plurality of the P1 antenna ports correspond to one same RF chain.

As an example, the T1 is equal to 1.

For one embodiment, the T1 is equal to P1, and the P1 antenna ports correspond to the T1 RF chains, respectively.

As an example, the T1 RF chains correspond to T1 analog beam directions, respectively.

As an example, a plurality of the T1 RF chains correspond to different analog beam directions.

As an example, multiple RF chains of the T1 RF chains correspond to the same analog beam direction.

As an example, one of the T1 RF chains corresponds to a plurality of analog beam directions.

As an embodiment, an analog beam direction is the direction of a line of sight of the antenna array without digital precoding.

As an embodiment, an analog beam direction is the center direction of a main lobe of the antenna array without digital precoding.

As an example, one analog beam direction corresponds to one analog beamforming vector of the first type.

As an example, one RF chain corresponds to one analog beamforming vector. The analog beamforming vector maps the output of the RF chain onto the antenna array. For a physical antenna to which the RF chain is not connected, the analog beamforming vector corresponds to a coefficient of 0.

As an example, the way one RF chain corresponds to multiple analog beam directions is: the outputs of the RF chains are mapped onto an antenna array by the analog beamforming vectors formed from a plurality of analog beamforming vectors of a first type.

As an embodiment, the analog beamforming vector is formed by a plurality of analog beamforming vectors of a first type by: the analog beamforming vector is a result of a superposition of a plurality of analog beamforming vectors of a first type.

As an embodiment, the analog beamforming vector is formed by a plurality of analog beamforming vectors of a first type by: the analog beamforming vector is a result of a concatenation of a plurality of analog beamforming vectors of a first type.

As an embodiment, the analog beamforming vector is formed by a plurality of analog beamforming vectors of a first type by: the analog beamforming vector is a result of multiplication of a plurality of analog beamforming vectors of a first type.

As an embodiment, the first type of analog beamforming vector is implemented by an array of phase shifters.

For one embodiment, the first type of analog beamforming vector is a DFT vector.

As an embodiment, one antenna port corresponds to one transmit beamforming vector formed by one digital precoding vector and one analog beamforming matrix. The digital precoding vector is a vector that maps the reference signal or radio resource block corresponding to the antenna port to its associated RF chain. The analog beamforming matrix is a matrix that maps the outputs of the RF chains associated with the antenna ports onto an antenna array.

As one embodiment, the analog beamforming matrix is comprised of analog beamforming vectors. One dimension of the analog beamforming matrix is the number of RF chains connected to the antenna array.

As an embodiment, the manner in which the transmit beamforming vector is formed from the digital precoding vector and the analog beamforming matrix is: the transmit beamforming vector is a product of the digital precoding vector and the analog beamforming matrix.

As an embodiment, the time domain resources occupied by the P1 antenna ports are overlapped.

As one embodiment, the time domain resource is a radio symbol.

As one embodiment, the time domain resource is a time slot.

As one embodiment, the time domain resource is a subframe.

As an example, the P1 is equal to 1.

As one example, the P1 is greater than 1.

As an embodiment, the first modulation scheme is one of { QPSK, 16QAM, 64QAM, 256QAM }.

As an embodiment, the first coding rate is a ratio of one information bit before the channel coding carried by one coded bit after the channel coding.

For one embodiment, the first coding rate is greater than 0 and less than 1.

As an embodiment, the first channel quality indicator is associated with { channel measurement result, the UE processing capability }, and the channel measurement result is obtained by performing channel estimation based on the reference signals associated with the P1 antenna ports.

As an embodiment, the first channel quality indication is used to determine at least one of { coding scheme, modulation scheme, coding rate, number of HARQ retransmissions }.

As an embodiment, the first information is a channel quality indication.

As an embodiment, the first information is transmitted on a physical layer control channel (i.e. a physical layer channel that can only carry physical layer signaling).

As an embodiment, the Physical layer control channel is a PUCCH (Physical Uplink control channel).

As an embodiment, the physical layer control channel is sPUCCH (short PUCCH, short physical uplink control channel).

As an embodiment, the first information is transmitted on a physical layer data channel (i.e., a physical layer channel capable of carrying physical layer data).

As an embodiment, the Physical layer data channel is a PUSCH (Physical Uplink shared channel).

As an embodiment, the physical layer data channel is a short PUSCH (short physical uplink shared channel).

As an embodiment, the first information is used to determine at least one of { the first modulation scheme, the first coding rate, the first channel quality indication } by: the first information indicates the first modulation scheme.

As an embodiment, the first information is used to determine at least one of { the first modulation scheme, the first coding rate, the first channel quality indication } by: the first information indicates the first coding rate.

As an embodiment, the first information is used to determine at least one of { the first modulation scheme, the first coding rate, the first channel quality indication } by: the first information comprises the first channel quality indication.

As one embodiment, the first information indicates: if the transmission power of the P1 antenna ports is increased by the first ratio, a bit block transmitted on the air interface resource associated with the P1 antenna ports in the first modulation mode and the first coding rate can be received at a block error rate not higher than 0.1.

As an embodiment, the bit Block is a Transport Block (TB).

As an embodiment, the length of the bit block is 1024 bits.

As one embodiment, the first ratio is a positive real number.

As an example, the first ratio is a positive integer.

As one example, the first ratio is associated with the P1.

As an embodiment, the first ratio is associated with the number of corresponding beam directions in the P1 antenna ports.

As an embodiment, the first ratio increases as the number of corresponding beam directions in the P1 antenna ports increases.

As an embodiment, the way in which the measurements for the first wireless signal are used to determine the first information is: the reference signals associated with the P1 antenna ports are used for measuring wireless channels associated with the antenna ports, and the measurement is used for determining at least one of { first modulation scheme, first coding rate, first channel quality indication }.

As an embodiment, the way in which the measurements for the first wireless signal are used to determine the first information is: the measurement results in a first SINR set, which is used to determine at least one of { first modulation, first coding rate, first channel quality indication }.

As an embodiment, the calculation of the first information assumes that the transmit power of the antenna port is increased by the first ratio in a manner that: the second SINR set is a result of increasing the SINR value included in the first SINR set by the first ratio, and the first information is used to determine at least one of { the first modulation scheme, the first coding rate, and the first channel quality indicator } corresponding to the second SINR set.

As an embodiment, the first SINR set includes only one SINR value.

As an embodiment, the first wireless signal is a multicarrier symbol, and the first SINR set includes a set of multicarrier SINR values.

As an embodiment, the UE maps the second SINR group to a first SINR value by means of Equivalent Exponential SNR Mapping (EESM), and the UE uses a channel quality indication corresponding to the first SINR value as a first channel quality indication.

In an embodiment, the UE sets a modulation scheme corresponding to the first SINR value as the first modulation scheme.

In an embodiment, the UE uses the coding rate corresponding to the first SINR value as the first coding rate.

As an example, the target threshold value is related to the P1.

Specifically, according to an aspect of the present invention, the step C further includes the steps of:

step C0. receives the first signaling.

Wherein the first signaling is used to determine at least one of { the air interface resources occupied by the L first type of wireless signals, the L, the air interface resources occupied by the first wireless signals, the P1, and the first ratio }, and the air interface resources include at least one of { time domain resources, frequency domain resources, and code domain resources }.

As an embodiment, the first signaling is higher layer signaling.

As an embodiment, the first signaling is physical layer signaling.

As an embodiment, the first signaling is cell-common.

As one embodiment, the first signaling is for the UE.

As an embodiment, the first signaling is for a terminal group, the terminal group includes a plurality of terminals, and the UE is one of the terminals in the terminal group.

As an embodiment, the first signaling is sent by the first antenna port.

As one embodiment, a receive beamforming vector for the first antenna port is used to determine a receive beamforming vector for the first signaling.

As an embodiment, the first signaling is sent by the first antenna port group.

As one embodiment, the receive beamforming vector for the first antenna port group is used to determine a receive beamforming vector for the first antenna port group.

As an embodiment, the first signaling is used to determine at least one of { the air interface resources occupied by the L first type wireless signals, the L, the air interface resources occupied by the first wireless signal, the P1, and the first ratio } in a manner that: the first signaling explicitly indicates at least one of { the air interface resources occupied by the L first type wireless signals, the L, the air interface resources occupied by the first wireless signals, the P1, the first ratio }.

As an embodiment, the first signaling is used to determine at least one of { the air interface resources occupied by the L first type wireless signals, the L, the air interface resources occupied by the first wireless signal, the P1, and the first ratio } in a manner that: the implicit indication of the first signaling { at least one of an air interface resource occupied by the L first type of wireless signals, the L, an air interface resource occupied by the first wireless signal, the P1, and the first ratio }.

Specifically, according to an aspect of the present invention, the step a further includes the steps of:

step A0. receives the second signaling.

Wherein the second signaling is used to determine at least one of { the air interface resources occupied by the Q second-type wireless signals, the Q, the air interface resources occupied by the second wireless signals, the P2, the target threshold, and the reference channel quality }.

As an embodiment, the second signaling is higher layer signaling.

As an embodiment, the second signaling is physical layer signaling.

As an embodiment, the second signaling is cell-common.

As an embodiment, the second signaling is used for air interface resources occupied by the Q second-type wireless signals, and at least one of the Q, the air interface resources occupied by the second wireless signals, the P2, the target threshold, and the reference channel quality } is implemented by: the second signaling explicitly indicates at least one of the air interface resources occupied by the Q second-type wireless signals, the Q, the air interface resources occupied by the second wireless signals, the P2, the target threshold, and the reference channel quality.

As an embodiment, the second signaling is used to determine air interface resources occupied by the Q second-type wireless signals, where the manner of at least one of the Q, the air interface resources occupied by the second wireless signals, the P2, the target threshold, and the reference channel quality } is: the second signaling implicitly indicates at least one of air interface resources occupied by the Q second-type wireless signals, the Q, air interface resources occupied by the second wireless signals, the P2, the target threshold, and the reference channel quality }.

In particular, according to one aspect of the invention, it is characterized in that said third information is used for determining at least one of { said target threshold, said first channel quality }.

As an embodiment, the third information is used to determine at least one of { the target threshold, the first channel quality }' by: the third information includes the target threshold.

As an embodiment, the third information is used to determine at least one of { the target threshold, the first channel quality }' by: the third information includes the first channel quality.

As an embodiment, the target threshold is used to determine the first ratio.

As an embodiment, the method by which the target threshold is used to determine the first ratio is: one of the P1 antenna ports corresponds to N1 beam directions, the N1 being greater than 1. M1 beam directions of the N1 beam directions are associated with at least one of { first antenna port group, first antenna port }. Beam directions of the N1 beam directions other than the M1 beam directions constitute a first beam direction group. The first beam direction group is associated with Q2 antenna ports of the Q antenna port groups. The first channel quality group consists of Q2 channel qualities corresponding to the Q2 antenna ports. The difference value of the first channel quality minus any one of the channel qualities in the first channel quality group is greater than or equal to a second threshold value, and the second threshold value is less than or equal to the target threshold value. The first ratio is equal to (N1-M1)/M1. The second threshold is determined by the base station. According to the embodiment, the (N1-M1) is associated with the target threshold, thus, the first ratio is associated with the target threshold.

As an example, the M1 is equal to 1.

As one example, the M1 is greater than 1.

As an embodiment, the method by which the target threshold is used to determine the first ratio is: the number of antenna ports in the target antenna port group is N1, the N1 being greater than P1. The P1 antenna ports are ones of the N1 antenna ports associated with at least one of { first antenna port group, first antenna port }. (N1-P1) antenna ports of the target antenna port group, excluding the P1 antenna ports, constitute a second antenna port group. The second antenna port group is associated with Q3 antenna ports of the Q antenna port groups. The first channel quality group consists of Q3 channel qualities corresponding to the Q3 antenna ports. The difference value of the first channel quality minus any one of the channel qualities in the first channel quality group is greater than or equal to a second threshold value, and the second threshold value is less than or equal to the target threshold value. The first ratio is equal to (N1-P1)/P1. The second threshold is determined by the base station. According to the embodiment, the (N1-P1) is associated with the target threshold, thus, the first ratio is associated with the target threshold.

As an embodiment, the first channel quality is used to determine the P1 antenna ports.

As an embodiment, the first channel quality is used to determine transmit beamforming vectors corresponding to the P1 antenna ports, respectively.

As an embodiment, the way that the first channel quality is used to determine the P1 antenna ports is: the first channel quality corresponding to the P1 antenna ports is greater than or equal to a first channel quality threshold. The first channel quality threshold is a threshold set by the base station.

-step e.

Wherein { at least one of the first information, the second information, the third information } is used to generate the third wireless signal.

As one embodiment, the third wireless signal is transmitted on a PDSCH.

As an embodiment, the third radio signal is transmitted over the sPDSCH.

As an embodiment, the transmit beamforming vectors corresponding to the P1 antenna ports are used for transmit beamforming of the third wireless signal.

As an embodiment, the received power of the third wireless signal is increased by a first ratio.

As an embodiment, the transmission power for transmitting the third wireless signal is increased by a first ratio.

As an embodiment, the beam directions of the P1 antenna ports for the UE are used to determine the beam direction of the third wireless signal.

As an embodiment, the beam direction of the third wireless signal consists of the beam directions of the P1 antenna ports for the UE.

As an embodiment, the number of antenna ports for transmitting the third wireless signal is P1.

The invention discloses a method used in a base station of multi-antenna transmission, which comprises the following steps:

-a. transmitting Q second type radio signals;

-step b.

As an embodiment, the second type of radio signal is cell common.

As one embodiment, the second type of wireless signal is for a plurality of UEs.

As an embodiment, the second type of radio signal is for one UE.

As an embodiment, the second type of wireless signals respectively correspond to different UE groups.

As an embodiment, the second type of radio signal corresponds to a same UE group.

As an embodiment, all antenna ports in the first antenna port group correspond to one UE.

As an embodiment, the antenna ports in the first antenna port group correspond to a plurality of UEs.

-step c. transmitting L first type radio signals;

-step d.

As an embodiment, the first type of radio signal is cell-common.

As one embodiment, the first type of wireless signals is for a plurality of UEs.

As an embodiment, the first type of radio signal is for one UE.

As an embodiment, the first type of wireless signals respectively correspond to different UE groups.

As an embodiment, the first type of wireless signals correspond to a same UE group.

As an embodiment, all antenna ports in the target antenna port group correspond to one UE.

As an embodiment, the antenna ports in the target antenna port group correspond to a plurality of UEs.

-d1. receiving the first information.

As an embodiment, the P1 wireless ports are for one target UE.

As an embodiment, the first wireless signal is for a target UE, and the first information is used to determine at least one of { first modulation scheme, first coding rate, first channel quality indication } associated with the target UE.

As an embodiment, the calculation of the first information by the target UE assumes that the transmission power of the antenna port is increased by a first ratio.

As an embodiment, the P1 wireless ports are for multiple UEs.

As an embodiment, the first wireless signal is for a plurality of UEs, and the first information is used to determine at least one of { a first modulation scheme, a first coding rate, a first channel quality indication } associated with the plurality of UEs.

As an embodiment, the calculation of the first information by each UE of the plurality of UEs assumes that the transmission power of the antenna port is increased by a first ratio.

step C0. sends the first signaling.

As an embodiment, the first signaling is for one target UE.

As an embodiment, the first signaling is for a terminal group, the terminal group includes a plurality of terminals, and the target UE is one terminal in the terminal group.

As one embodiment, a transmit beamforming vector for the first antenna port is used to determine a transmit beamforming vector for the first signaling.

As one embodiment, a transmit beamforming vector for the first antenna port group is used to determine a transmit beamforming vector for the first signaling.

step A0. sends the second signaling.

-step c.

The invention discloses user equipment used for multi-antenna transmission, which comprises the following modules:

-a first receiving module: for receiving Q second type wireless signals;

-a first sending module: for transmitting the third information.

As an embodiment, the ue is characterized in that the first receiving module is further configured to receive L first-type wireless signals; the first sending module is further configured to send second information. Wherein, the L first-type wireless signals are respectively transmitted by L antenna port groups. The target first type of wireless signal is one of the L first type of wireless signals. The target antenna port group is the antenna port group of the L antenna port groups for transmitting the target first type of wireless signal. The second information is used to determine the target antenna port group from the L antenna port groups. The L antenna port groups are associated with at least one of { the first antenna port group, the first antenna port }.

As an embodiment, the above user equipment is characterized in that the first sending module is further configured to send the first information. Wherein the first information is used to determine at least one of { first modulation scheme, first coding rate, first channel quality indication }. Measurements for a first wireless signal transmitted by P1 antenna ports are used to determine the first information, the P1 being a positive integer. The calculation of the first information assumes that the transmission power of the antenna port is increased by a first ratio. The P1 antenna ports are associated with at least one of the first antenna port group, the first antenna port. The first wireless signal is the target first type wireless signal, and the P1 antenna ports form the target antenna port group; or the first wireless signal is part of the target first type of wireless signal, the P1 antenna ports being a subset of the target set of antenna ports.

As an embodiment, the above user equipment is characterized in that the first receiving module is further configured to receive a first signaling. Wherein the first signaling is used to determine at least one of { the air interface resources occupied by the L first type of wireless signals, the L, the air interface resources occupied by the first wireless signals, the P1, and the first ratio }, and the air interface resources include at least one of { time domain resources, frequency domain resources, and code domain resources }.

As an embodiment, the above user equipment is characterized in that the first receiving module is further configured to receive a second signaling. Wherein the second signaling is used to determine at least one of { the air interface resources occupied by the Q second-type wireless signals, the Q, the air interface resources occupied by the second wireless signals, the P2, the target threshold, and the reference channel quality }.

As an embodiment, the user equipment is characterized by further comprising a third receiving module: for receiving the third wireless signal. Wherein { at least one of the first information, the second information, the third information } is used to generate the third wireless signal.

The invention discloses a base station device used for multi-antenna transmission, which comprises the following modules:

-a second sending module: transmitting Q second-type wireless signals;

-a second receiving module: for receiving the third information.

As an embodiment, the base station device is characterized in that the second sending module is further configured to send L first-type wireless signals; the second receiving module is further configured to receive second information. Wherein, the L first-type wireless signals are respectively transmitted by L antenna port groups. The target first type of wireless signal is one of the L first type of wireless signals. The target antenna port group is the antenna port group of the L antenna port groups for transmitting the target first type of wireless signal. The second information is used to determine the target antenna port group from the L antenna port groups. The L antenna port groups are associated with at least one of { the first antenna port group, the first antenna port }.

As an embodiment, the base station device is characterized in that the second receiving module is further configured to receive the first information. Wherein the first information is used to determine at least one of { first modulation scheme, first coding rate, first channel quality indication }. Measurements for a first wireless signal transmitted by P1 antenna ports are used to determine the first information, the P1 being a positive integer. The calculation of the first information assumes that the transmission power of the antenna port is increased by a first ratio. The P1 antenna ports are associated with at least one of the first antenna port group, the first antenna port. The first wireless signal is the target first type wireless signal, and the P1 antenna ports form the target antenna port group; or the first wireless signal is part of the target first type of wireless signal, the P1 antenna ports being a subset of the target set of antenna ports.

As an embodiment, the base station device is characterized in that the second sending module is further configured to send the first signaling. Wherein the first signaling is used to determine at least one of { the air interface resources occupied by the L first type of wireless signals, the L, the air interface resources occupied by the first wireless signals, the P1, and the first ratio }, and the air interface resources include at least one of { time domain resources, frequency domain resources, and code domain resources }.

As an embodiment, the base station device is characterized in that the second sending module is further configured to send a second signaling. Wherein the second signaling is used to determine at least one of { the air interface resources occupied by the Q second-type wireless signals, the Q, the air interface resources occupied by the second wireless signals, the P2, the target threshold, and the reference channel quality }.

As an embodiment, the base station device is characterized in that the third transmitting module is further configured to transmit a third wireless signal. Wherein { at least one of the first information, the second information, the third information } is used to generate the third wireless signal.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 shows a flow diagram of multi-antenna transmission according to an embodiment of the invention;

fig. 2 shows a schematic diagram of { first signaling, second signaling, first information, second information, third information, first wireless signal, second wireless signal, third wireless signal } resource mapping in the time domain according to an embodiment of the present invention;

fig. 3 shows a schematic diagram of { first antenna port group, first antenna port } according to an embodiment of the invention;

fig. 4 shows a schematic diagram of P1 antenna ports associated with a first antenna port, according to an embodiment of the invention;

fig. 5 shows a schematic diagram of L antenna port groups associated with a first antenna port and a third wireless signal associated with a target antenna port group according to one embodiment of the invention;

fig. 6 shows a block diagram of a processing device used in a UE according to an embodiment of the invention;

fig. 7 shows a block diagram of a processing device used in a base station according to an embodiment of the present invention.

Example 1

Embodiment 1 illustrates a flow chart of multi-antenna transmission, as shown in fig. 1. In fig. 1, base station N1 is the serving cell maintenance base station for UE U2. In FIG. 1, the steps in block F1, block F2, block F3, block F4, and block F5, respectively, are optional. Wherein, when block F4 is selected, the first wireless signal is a target first type wireless signal of the L first type wireless signals; alternatively, the first wireless signal is part of a target first type of wireless signal.

For N1, send second signaling in step S11; transmitting Q second-type wireless signals in step S12; receiving third information in step S13; transmitting a first signaling in step S14; transmitting L first type wireless signals in step S16; receiving second information in step S17; receiving the first information in step S18; a third wireless signal is transmitted in step S19.

For U2, receiving second signaling in step S21; receiving Q second type wireless signals in step 22; transmitting third information in step 23; receiving a first signaling in step S24; receiving L first type wireless signals in step S26; transmitting the second information in step S27; transmitting the first information in step S28; the third wireless signal is received in step S29.

In embodiment 1, the first wireless signal is transmitted by base station N1 using P1 antenna ports, which UE U2 uses for its measurements of the first wireless signal to determine the first information, the P1 being a positive integer. The first information is used by the base station N1 to determine at least one of { first modulation scheme, first coding rate, first channel quality indication }. The calculation of the first information by the UE U2 assumes that the transmit power of the antenna port is increased by a first ratio. The P1 antenna ports are associated with the first antenna port. The L first type wireless signals are respectively transmitted by the base station N1 using L antenna port groups, where the antenna port groups include a positive integer number of antenna ports. The target first type of wireless signal is one of the L first type of wireless signals. The target antenna port group is the antenna port group of the L antenna port groups used by base station N1 to transmit the target first type of wireless signal. The second information is used by base station N1 to determine the target antenna port group from the L antenna port groups. The Q second-type wireless signals are respectively transmitted by the base station N1 using Q antenna port groups, where the antenna port groups include a positive integer number of antenna ports. And Q is a positive integer. The third information is used by the base station N1 to determine at least one of the first antenna port group, the first antenna port. The first antenna port is one of a first antenna port group, which is one of the Q antenna port groups. The first antenna port group includes P2 of the antenna ports, the P2 being a positive integer greater than 1. The second wireless signal is one of the Q second-type wireless signals. The second wireless signal is transmitted by the first antenna port group. The first antenna port corresponds to a first channel quality, the first channel quality not being lower than a sum of a reference channel quality plus a target threshold. The first signaling is used by the UE U2 to determine at least one of { an air interface resource occupied by the L first type of wireless signals, the L, an air interface resource occupied by the first wireless signal, the P1, the first ratio }, where the air interface resource includes at least one of { a time domain resource, a frequency domain resource, and a code domain resource }. The second signaling is used by the UE U2 to determine at least one of { the air interface resources occupied by the Q second-type wireless signals, the Q, the air interface resources occupied by the second wireless signals, the P2, the target threshold, and the reference channel quality }. The third information is used by base station N1 to determine at least one of { the target threshold, the first channel quality }. { the first information, the second information, the third information } is used by base station N1 for generating the third wireless signal.

As sub-embodiment 1 of embodiment 1, the first wireless signal is the target first type wireless signal, and the P1 antenna ports form the target antenna port group.

As sub-embodiment 2 of embodiment 1, the first wireless signal is part of the target first type of wireless signal, and the P1 antenna ports are a subset of the target antenna port group.

As sub-embodiment 3 of embodiment 1, the P1 antenna ports are associated with the first antenna port.

As sub-embodiment 4 of embodiment 1, the L antenna port groups are associated with the first antenna port.

As sub-embodiment 5 of embodiment 1, the first information is used by the base station N1 to determine { first modulation scheme, first coding rate }.

As sub-embodiment 6 of embodiment 1, the third information is used by base station N1 to determine { first antenna port group, first antenna port }.

As sub-embodiment 7 of embodiment 1, the first signaling is used by the UE U2 to determine an air interface resource occupied by the L first-type wireless signals, where the L, the P1, and the first ratio are { the air interface resource includes a time domain resource, a frequency domain resource, and a code domain resource }.

As sub-embodiment 8 of embodiment 1, the second signaling is used by the UE U2 to determine { air interface resources occupied by the Q second-type wireless signals, the Q, the P2 }.

As sub-embodiment 9 of embodiment 1, the third information is used by the base station N1 to determine the target threshold.

As sub-embodiment 10 of embodiment 1, the { the first information, the second information } is used by a base station N1 to generate the third wireless signal.

As a sub-embodiment 11 of embodiment 1, one antenna port corresponds to and closely corresponds to one reference signal, and a sequence corresponding to the reference signal is a pseudo-random sequence.

As a sub-embodiment 12 of embodiment 1, the time domain resource occupied by the second information is associated with the time domain resource occupied by the target antenna port group, and the time domain resource occupied by the third information is associated with the time domain resource occupied by the antenna port group.

Example 2

Embodiment 2 illustrates a schematic diagram of { first signaling, second signaling, first information, second information, third information, first wireless signal, second wireless signal, third wireless signal } resource mapping in the time domain according to an embodiment of the present invention, as shown in fig. 2. In fig. 2, one square is a time resource.

In embodiment 2, the first information and the second information occupy one time resource and are transmitted on the same time resource. The time resource occupied by the second signaling precedes the time resource occupied by the second wireless signal. The time resource occupied by the second wireless signal is prior to the time resource occupied by the third information. The time resource occupied by the third information is before the time resource occupied by the first signaling. The time resource occupied by the first signaling is prior to the time resource occupied by the first wireless signal. The time resource occupied by the first wireless signal is prior to the time resource occupied by { the first information, the second information }. The time resource occupied by the third wireless signal is after the time resource occupied by { the first information, the second information }.

As sub-embodiment 1 of embodiment 2, the first signaling is used to determine a time resource occupied by the first wireless signal. The second signaling is used to determine a time resource occupied by the second wireless signal. The first wireless signal is used to determine time resources occupied by { the first information, the second information }. The second wireless signal is used to determine a time resource occupied by the third information.

As sub-embodiment 2 of embodiment 2, the first signaling and the second signaling are higher layer signaling.

As sub-embodiment 3 of embodiment 2, the first signaling and the second signaling are physical layer signaling.

As sub-embodiment 4 of embodiment 2, the { the first information, the second information } and the third information are transmitted on a physical layer control channel.

As a sub-embodiment 5 of embodiment 2, { the first information, the second information } and the third information are for the same CSI Process (Process).

As sub-embodiment 6 of embodiment 2, the first information and the second information belong to one Uplink Control Indication (UCI).

As sub embodiment 7 of embodiment 2, the { the first information, the second information } and the third information are transmitted on a physical layer data channel.

As a sub-embodiment 8 of embodiment 2, { the first signaling, the second signaling, the first information, the second information, the third information, the first wireless signal, the second wireless signal, the third wireless signal } are orthogonal in time.

As sub-embodiment 9 of embodiment 2, the first wireless signal occupies the entire system bandwidth in the frequency domain.

As sub-embodiment 10 of embodiment 2, the first wireless signal occupies a portion of the entire system bandwidth in the frequency domain.

As sub-embodiment 11 of embodiment 2, the first wireless signal occupies the entire system bandwidth in the frequency domain.

As a sub-embodiment 12 of embodiment 2, the first wireless signal occupies a portion of the entire system bandwidth in the frequency domain.

Example 3

Embodiment 3 shows a schematic diagram of a first antenna port group, a first antenna port according to an embodiment of the present invention, as shown in fig. 3.

In embodiment 3, the Q air interface resources are respectively used to send Q second-type wireless signals, where the Q second-type wireless signals respectively correspond to Q antenna port groups. One port in the Q antenna port groups corresponds to one beamforming vector. The Q antenna port groups correspond to Q beamforming vector groups. The first antenna port group is one of the Q antenna port groups. The first antenna port group consists of P2 antenna ports. The P2 antenna ports correspond to P2 beamforming vectors. The first antenna port is one of the P2 antenna ports. The second wireless signal is one of the Q second-type wireless signals. The second wireless signal is transmitted by the first antenna port group. The first antenna port corresponds to a first channel quality, the first channel quality not being lower than a sum of a reference channel quality plus a target threshold.

As sub-example 1 of example 3, the P2 is greater than 1.

As sub-example 2 of example 3, the P2 is equal to 1.

As sub-embodiment 3 of embodiment 3, any one of the Q antenna port groups includes P2 antenna ports.

As sub-example 4 of example 3, the Q is greater than 1.

As sub-embodiment 5 of embodiment 3, Q is equal to 1.

As sub-embodiment 6 of embodiment 3, the first antenna port corresponds to a plurality of beam directions.

Example 4

Embodiment 4 shows a schematic diagram of P1 antenna ports associated with a first antenna port according to an embodiment of the present invention, as shown in fig. 4.

In embodiment 4, a subset of the beam directions corresponding to the P1 antenna ports is associated with the beam direction corresponding to the first antenna port.

As sub-embodiment 1 of embodiment 4, one subset of the beam directions corresponding to the P1 antenna ports is the beam direction corresponding to the first antenna port, as shown in fig. 4 (a). The first antenna port corresponds to P1 beam directions. Each of the P1 antenna ports corresponds to N1 beam directions. One of the N1 beam directions is one of the P1 beam directions.

As sub-embodiment 2 of embodiment 4, one analog beam direction corresponding to the P1 antenna ports is a beam direction corresponding to the first antenna port, as shown in fig. 4 (b). The first antenna port corresponds to one beam direction, and each of the P1 antenna ports corresponds to N1 analog beam directions. The beam direction corresponding to the first antenna port is one of the N1 analog beam directions. The P1 antenna ports respectively correspond to different digital precoding vectors.

As sub-embodiment 3 of embodiment 4, a beam direction corresponding to the P1 antenna ports is within a coverage area of a beam corresponding to the first antenna port, as shown in fig. 4 (c). The first antenna port corresponds to a wide beam, and each of the P1 antenna ports corresponds to N1 beam directions. One of the N1 beam directions is within a coverage area of a wide beam corresponding to the first antenna port.

As a sub-embodiment 4 of the embodiment 4, the beam direction, which is unrelated to the first antenna port, of the beam directions associated with the P1 antenna ports is associated with other UEs except the UE.

As sub-embodiment 5 of embodiment 4, one antenna port of the P1 antenna ports corresponds to N1 beam directions, and N1 is greater than 1. N2 beam directions of the N1 beam directions are associated with a first antenna port. A first set of beam directions consists of beam directions of the N1 beam directions other than the N2 beam directions. The first beam direction group is associated with M1 antenna ports of the Q antenna port groups. The first channel quality group is composed of M1 channel qualities corresponding to the M1 antenna ports. The first antenna port corresponds to a first channel quality. The difference of the first channel quality minus any one of the channel qualities in the first channel quality group is greater than or equal to a second threshold. The second threshold is less than or equal to a target threshold. The second threshold is set by the base station. The target threshold is a difference between the first channel quality and a reference channel quality. The reference channel quality is the best channel quality corresponding to the other antenna ports except the first antenna port, which is obtained by measuring the Q antenna port groups by the UE. The UE calculates a first ratio from N1 and N2. The first ratio is equal to (N1-N2)/N1. The UE's calculation of { first modulation, first coding rate } assumes that the transmit power of the P1 antenna ports is increased by the first ratio.

As sub-example 6 of example 4, the N2 is equal to 1.

As sub-example 7 of example 4, the N2 is greater than 1.

As sub-example 8 of example 4, the P1 is equal to 1.

As sub-example 9 of example 4, the P1 is greater than 1.

As sub-embodiment 10 of embodiment 4, one antenna port corresponding to multiple beam directions can be implemented by designing corresponding digital precoding vectors and analog beamforming matrices.

Example 5

Embodiment 5 shows a schematic diagram of L antenna port groups associated with a first antenna port and a third wireless signal associated with a target antenna port group according to an embodiment of the present invention, as shown in fig. 5.

In embodiment 5, the first antenna port is the first antenna port illustrated in fig. 3. The first antenna port corresponds to a wide beam. The wide beam corresponds to L oversubsampled beam directions. Any one of the L antenna port groups corresponds to P2 analog beam directions. One of the P2 analog beam directions is one of the L oversubscription beam directions. The P2 analog beam directions correspond to P2 first-type analog beamforming vectors, respectively. The other ones of the P2 first-type analog beamforming vectors correspond to other ones of the antenna ports of the first antenna port set of fig. 3 except for the first antenna port. The target antenna port group corresponds to a first analog beamforming matrix. The first analog beamforming matrix is formed by the P2 first-type analog beamforming vectors. The target antenna port group comprises P1 antenna ports, and the P1 antenna ports respectively correspond to P1 digital precoding vectors. The second antenna port is one of the P1 antenna ports. The first digital precoding vector is a digital precoding vector corresponding to the second antenna port. And the beam forming vector corresponding to the second antenna port is the product of the first digital precoding vector and the first analog beam forming matrix. The first analog beam direction is the analog beam direction corresponding to the target antenna port group among the L oversubsampled beam directions. The second analog beamforming vector is a first type of analog beamforming vector corresponding to the first analog beam direction. The base station uses the analog beamforming matrix formed by the second analog beamforming vector for transmitting the third wireless signal. The { first modulation scheme, first coding rate } included in the first information is used to determine a modulation scheme and a coding rate of the third wireless signal. The UE's calculation of { first modulation scheme, first coding rate } assumes that the transmit power of the target antenna port group is increased by a first ratio.

As sub-embodiment 1 of embodiment 5, a beam direction unrelated to the first antenna port among beam directions associated with one antenna port group of the L antenna port groups is associated with other UEs than the UE.

As sub-example 2 of example 5, the L is equal to 1.

As sub-example 3 of example 5, the L is greater than 1.

As sub-embodiment 4 of embodiment 5, the transmission power of the third signal is increased by the base station by the first ratio.

Example 6

Embodiment 6 illustrates a block diagram of a processing apparatus used in a UE, as shown in fig. 6.

In fig. 6, the UE apparatus 200 mainly includes a first receiving module 201, a first transmitting module 202, and a third receiving module 203.

In embodiment 6, the first receiving module 201 is used to receive a first wireless signal; the first sending module 202 is configured to send first information; the third receiving module 203 is used for receiving a third wireless signal.

In embodiment 6, the first wireless signal is transmitted by a base station using P1 antenna ports, measurements for the first wireless signal are used by UEs to determine the first information, the P1 is greater than 1. The first information is used by the base station to determine { a first modulation scheme, a first coding rate }. The UE's calculation of the first information assumes that the transmit power of the antenna ports is increased by a first ratio. The P1 antenna ports are associated with the first antenna port.

As sub-embodiment 1 of embodiment 6, the first receiving module 201 is further configured to receive L first-type wireless signals, and the first sending module 202 is further configured to send second information. The second information is used by a base station to determine the P1 antenna ports. The UE determines the second information from measurements on the L first type wireless signals.

As sub-embodiment 2 of embodiment 6, the first receiving module 201 is further configured to receive Q second-type wireless signals, and the first sending module 202 is further configured to send third information. The third information is used by the base station to determine a first antenna port group, a first antenna port. The first antenna port corresponds to a first channel quality, the first channel quality not being lower than a sum of a reference channel quality plus a target threshold. The UE determines the third information from measurements on the Q second type radio signals.

As sub-embodiment 3 of embodiment 6, the first receiving module 201 is further configured to receive the first signaling. The first signaling is used by the UE to determine { air interface resources occupied by the L first type wireless signals, the L, the P1, the first ratio }.

As sub-embodiment 4 of embodiment 6, the first receiving module 201 is further configured to receive a second signaling. The second signaling is used to determine { air interface resources occupied by the Q second-type wireless signals, the Q, the P2 }.

As sub-embodiment 5 of embodiment 6, the { the first information, the second information } is used by a base station to generate the third radio signal.

Example 7

Embodiment 7 illustrates a block diagram of a processing apparatus used in a base station, as shown in fig. 7.

In fig. 7, the base station apparatus 300 mainly includes a second transmitting module 301, a second receiving module 302, and a third transmitting module 303.

In embodiment 7, the second transmitting module 301 is configured to transmit a first wireless signal; the second receiving module 302 is used for receiving the first information; the third sending module 303 is configured to send a third wireless signal.

In embodiment 7, the first wireless signal is transmitted by a base station using P1 antenna ports, measurements for the first wireless signal are used by UEs to determine the first information, the P1 is greater than 1. The first information is used by the base station to determine { a first modulation scheme, a first coding rate }. The UE's calculation of the first information assumes that the transmit power of the antenna ports is increased by a first ratio. The P1 antenna ports are associated with the first antenna port.

As sub-embodiment 1 of embodiment 7, the second sending module 301 is further configured to send L first-type wireless signals, and the second receiving module 302 is further configured to receive second information. The second information is used by a base station to determine the P1 antenna ports. The UE determines the second information from measurements on the L first type wireless signals.

As sub-embodiment 2 of embodiment 7, the second sending module 301 is further configured to send Q second-type wireless signals, and the second receiving module 302 is further configured to receive third information. The third information is used by the base station to determine a first antenna port group, a first antenna port. The first antenna port corresponds to a first channel quality, the first channel quality not being lower than a sum of a reference channel quality plus a target threshold. The UE determines the third information from measurements on the Q second type radio signals.

As sub-embodiment 3 of embodiment 7, the second sending module 301 is further configured to send the first signaling. The first signaling is used by the UE to determine { air interface resources occupied by the L first type wireless signals, the L, the P1, the first ratio }.

As sub-embodiment 4 of embodiment 7, the second sending module 301 is further configured to send second signaling. The second signaling is used by the UE to determine { air interface resources occupied by the Q second-type wireless signals, the Q, the P2 }.

As sub-embodiment 5 of embodiment 7, the { the first information, the second information } is used by a base station to generate the third radio signal.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE or the terminal in the invention includes but is not limited to wireless communication equipment such as a mobile phone, a tablet computer, a notebook, a network card, an NB-IOT terminal, an eMTC terminal and the like. The base station or system device in the present invention includes but is not limited to a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method in a UE used for multi-antenna transmission, comprising the steps of:

-a. receiving Q second type radio signals;

-step b. sending a third information;

the Q second-type wireless signals are respectively sent by Q antenna port groups, and the antenna port groups comprise a positive integer number of antenna ports; q is a positive integer; the third information is used to determine a first antenna port; the third information is transmitted on a physical layer control channel, or the third information is transmitted on a physical layer data channel; the first antenna port is one of a first antenna port group, the first antenna port group being one of the Q antenna port groups; the first antenna port group comprises P2 of the antenna ports, the P2 being a positive integer greater than 1; the second wireless signal is one of the Q second-type wireless signals; the second wireless signal is transmitted by the first antenna port group; the first antenna port corresponds to a first channel quality, the first channel quality not being lower than a sum of a reference channel quality plus a target threshold.

2. The method of claim 1, further comprising the steps of:

-step c. receiving L first type radio signals;

-step d. sending the second information;

the L first-type wireless signals are respectively transmitted by L antenna port groups; the target first type wireless signal is one of the L first type wireless signals; the target antenna port group is the antenna port group in the L antenna port groups for transmitting the target first type wireless signals; the second information is used to determine the target antenna port group from the L antenna port groups; the L antenna port groups and the first antenna port group, at least one of the first antenna ports being associated.

3. The method of claim 2, wherein said step D further comprises the steps of:

-d1. sending the first information;

wherein the first information is used for determining at least one of a first modulation mode, a first coding rate and a first channel quality indication; measurements for a first wireless signal are used to determine the first information, the first wireless signal being transmitted by P1 antenna ports, the P1 being a positive integer; the calculation of the first information assumes that the transmission power of the antenna port is increased by a first ratio; the P1 antenna ports being associated with the first set of antenna ports, at least one of the first antenna ports being associated with; the first wireless signal is the target first type wireless signal, and the P1 antenna ports form the target antenna port group; or the first wireless signal is part of the target first type of wireless signal, the P1 antenna ports being a subset of the target set of antenna ports.

4. The method of claim 3, wherein step C further comprises the steps of:

-step C0. receiving the first signaling;

the first signaling is used to determine an air interface resource occupied by the L first-type wireless signals, where the L, the air interface resource occupied by the first wireless signal, the P1, and at least one of the fifth first proportion, and the air interface resource includes at least one of a time domain resource, a frequency domain resource, and a code domain resource.

5. The method according to any one of claims 1 to 4, wherein the step A further comprises the steps of:

-step A0. receiving the second signaling;

the second signaling is used to determine at least one of an air interface resource occupied by the Q second-type wireless signals, the Q, an air interface resource occupied by the second wireless signal, the P2, the target threshold, and the reference channel quality.

6. The method according to any of claims 1 to 4, wherein said third information is used for determining at least one of said target threshold, said first channel quality.

7. The method according to claim 3 or 4, further comprising the steps of:

-step e. receiving a third wireless signal;

wherein at least one of the first information, the second information, and the third information is used to generate the third wireless signal.

8. A method in a base station used for multi-antenna transmission, comprising the steps of:

-a. transmitting Q second type radio signals;

-step b. receiving third information;

9. A user equipment for multi-antenna transmission, comprising the following modules:

-a first receiving module: for receiving Q second type wireless signals;

-a first sending module: for transmitting the third information;

10. A base station device used for multi-antenna transmission, comprising the following modules:

-a second sending module: transmitting Q second-type wireless signals;

-a second receiving module: for receiving third information;