CN105471559B

CN105471559B - Quasi-co-location configuration and determination method and device

Info

Publication number: CN105471559B
Application number: CN201410452074.9A
Authority: CN
Inventors: 孙云锋; 郝鹏; 张淑娟
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2014-09-05
Filing date: 2014-09-05
Publication date: 2020-01-14
Anticipated expiration: 2034-09-05
Also published as: WO2016033978A1; CN105471559A

Abstract

The invention discloses a method and a device for configuring and determining a quasi-co-location, wherein in the method, all CSI-RSs configured currently are obtained; and respectively configuring corresponding QCL-CSI-RSs for each set of CSI-RSs in all the CSI-RSs, wherein the QCL-CSI-RSs are used for jointly estimating large-scale characteristic parameters of the channel with the CSI-RSs, and configuring all the CSI-RSs and the QCL-CSI-RSs corresponding to all the sets of CSI-RSs to the terminal. According to the technical scheme provided by the invention, the noise influence on the CSI-RS when the CSI-RS is used for frequency offset and frequency extension estimation can be avoided, and the CSI-RS can be directly used as a cell discovery signal.

Description

Quasi-co-location configuration and determination method and device

Technical Field

The invention relates to the field of communication, in particular to a method and a device for configuring and determining a quasi-co-location.

Background

With the recent widespread use of devices such as smart mobile terminals, higher and higher demands have been made on the throughput of the system. Under the condition that the spectrum resources are increasingly tense, synchronously deploying a large number of small cells to obtain a large cell splitting gain is an effective way to improve the system efficiency. In this context, the concept of Ultra Dense Networks (UDN) has come into force.

However, mobility and interference problems arise, and in order to solve the mobility and interference problems in UDNs, an effective approach is based on virtualized cells (also called closed cells), i.e. individual cells are not visible to the User Equipment (UE), and different cells resemble distributed transmit antennas with respect to the UE. When receiving a signal, a terminal only needs to detect channel information estimated according to a reference signal configured on a network side, and does not need to know from which small cell (small cell or Pico) a corresponding signal comes. Based on the concept of cell virtualization, the mobility problem in the UDN can be effectively solved, and meanwhile, the network side can flexibly configure cells for cooperatively transmitting signals according to the interference environment, so that the interference between small cells is avoided, and even the macro diversity gain effect is obtained through combined transmission.

One way to implement cell virtualization is based on the idea of separation of the control plane and the user plane, i.e. information of the control plane is transmitted by the macro station or a specific carrier, while data of the user plane is transmitted by the small cell; meanwhile, the terminal is prevented from mistakenly accessing the small cell and establishing connection with the small cell, so that the mobility is prevented from being influenced. In a small cell, a main/auxiliary synchronization Signal, a Common Reference Signal (CRS), a broadcast Signal, and the like are not often transmitted.

Based on the above manner, the mobility and interference problems in the UDN can be effectively alleviated, but another problem to be considered therewith is that the terminal estimates downlink large-scale parameters (for example, time/frequency offset, delay spread, frequency spread, etc.). Since the terminal cannot identify different small cells and the small cells do not transmit common reference signals, the terminal cannot perform time-frequency offset estimation based on the CRS.

In Long Term Evolution (LTE) R10, in addition to the above mentioned CRS, a Channel State Information Reference Signal (CSI-RS) is introduced, but the CSI-RS pattern design in the current system is not favorable for frequency offset estimation. Fig. 1 is a diagram illustrating patterns of different port REs in a set of CSI-RS according to the related art. As shown in fig. 1, in the figure

The pattern of different port Resource Elements (REs) in a given set of CSI-RS is illustrated. As can be seen from the figure, the REs corresponding to each CSI-RS set are on two adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols, and therefore, this configuration limits the performance of Frequency offset estimation (the capability of suppressing noise is very poor). It should be noted that in LTE, the CSI-RS ports 0-7 in FIG. 1 correspond to ports 15-22, respectively, in the protocol. Wherein the figure shows the configuration mode of one set of CSI-RSSchematically, in LTE, different cells may configure CSI-RS at different time-frequency resource locations, but the basic pattern is consistent. Specifically, the CSI-RS mapping method under different configurations is shown as follows:

wherein,

l"＝0,1

wherein, possible values of (k ', l') in normal cp (normal cp) and extended cp (extended cp) are shown in table 1 and table 2 below, where k ', l' respectively represent subcarrier relative index and OFDM symbol relative index of each PRB in one slot.

Table 1 is (k ', l') corresponding to CSI-RS resource mapping under extended CP. As shown in Table 1, w_l"denotes spreading weight values on the ports.

TABLE 1

Table 2 shows (k ', l') corresponding to the CSI-RS resource mapping under the normal CP. As shown in the table 2 below, the following examples,

TABLE 2

In LTE R11, for the problem of poor CSI-RS frequency offset estimation capability, a CRS for satisfying a Quasi-Co-Location (QCL) relationship is configured for each set of CSI-RS, and a terminal may estimate large-scale characteristic parameters (e.g., time/frequency offset, delay spread, and frequency spread) according to the CRS, and may assume that the large-scale characteristic parameters on the CRS are the same as those of the CSI-RS, where the QCL is used to represent a large-scale characteristic relationship between antenna ports, and when it is said that a QCL relationship is satisfied between two antenna ports a and B, it means that the channel large-scale characteristic parameters estimated on the antenna port a are also suitable for the antenna port B. Therefore, when CRS of QCL is configured for CSI-RS in R11, it means that the CSI-RS port and the CRS port to terminal channel have the same large scale characteristic.

However, in the UDN scenario, since the small cell does not transmit the CRS of the cell specific, it cannot be realized by configuring the CRS satisfying the QCL relationship for the CSI-RS.

In summary, a solution for large-scale feature parameter estimation by cooperating UEs in the UDN is lacking in the related art.

Disclosure of Invention

The invention provides a method and a device for configuring and determining a quasi-co-location, which are used for at least solving the problem that a solution for estimating large-scale characteristic parameters by cooperating UE in a UDN is lacked in the related technology.

According to one aspect of the invention, a method of configuring quasi-co-locations is provided.

The configuration method of the quasi-co-location comprises the following steps: acquiring all currently configured channel state information reference signals (CSI-RS); respectively configuring corresponding quasi co-location channel state information reference signals QCL-CSI-RS for each set of CSI-RS in all the CSI-RSs, wherein the QCL-CSI-RS is used for jointly estimating large-scale characteristic parameters of a channel with the CSI-RSs; and configuring all the CSI-RSs and QCL-CSI-RSs corresponding to all sets of CSI-RSs to the terminal.

Preferably, the channel large-scale characteristic parameters include at least one of: frequency offset parameters and frequency extension parameters.

Preferably, after configuring the corresponding QCL-CSI-RS for the CSI-RS, the method further includes: and transmitting the corresponding QCL-CSI-RS on part or all of the ports used by the CSI-RS.

Preferably, transmitting the corresponding QCL-CSI-RS on part or all of the ports used by the CSI-RS comprises one of: the QCL-CSI-RS only supports 1 port by default, and a reference signal of a port 0 of the QCL-CSI-RS is transmitted on a port 0 of the CSI-RS; the QCL-CSI-RS supports 2 ports at maximum by default, and when the number of the QCL-CSI-RS ports is 1, a reference signal of a QCL-CSI-RS port 0 is transmitted on a port 0 of the CSI-RS; when the number of the QCL-CSI-RS ports is 2, reference signals of a QCL-CSI-RS port 0 and a QCL-CSI-RS port 1 are respectively transmitted on a CSI-RS port 0 and a CSI-RS port 1; or, the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RS

An uplink transmission, where N is the number of ports of the CSI-RS and N is a positive integer,

represents rounding up x; the QCL-CSI-RS only supports 2 ports by default, and reference signals of a port 0 and a port 1 of the QCL-CSI-RS are respectively transmitted on the port 0 and the port 1 of the CSI-RS; or, the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RSAn uplink transmission, where N is the number of ports of the CSI-RS and N is a positive integer,

indicating rounding up x.

Preferably, after configuring the corresponding QCL-CSI-RS for the CSI-RS, the method further includes: indicating parameter configuration information of the QCL-CSI-RS to the terminal, wherein the parameter configuration information comprises at least one of the following: resource configuration indication information, QCL-CSI-RS port number information, scrambling code Identification (ID) information, subframe configuration information, relative subframe configuration information and mapping frequency band indication information; the relative subframe configuration information includes at least one of: the subframe offset or the time slot offset of the QCL-CSI-RS relative to the CSI-RS and the period of the QCL-CSI-RS relative to the CSI-RS.

Preferably, after configuring the corresponding QCL-CSI-RS for the CSI-RS, the method further includes: and sending configuration indication information of the QCL-CSI-RS to a terminal, wherein the configuration indication information carries port number information of the QCL-CSI-RS, the port number information is used for implicitly indicating QCL grouping information in the CSI-RS and is determined by the QCL grouping quantity of the CSI-RS, and the QCL grouping information is used for grouping the ports when all the ports in the CSI-RS cannot meet QCL characteristics, and dividing the ports meeting the QCL characteristics into the same group.

Preferably, the transmitting the corresponding QCL-CSI-RS on part or all of the ports used by the CSI-RS comprises: and transmitting a reference signal on a QCL-CSI-RS port k on a port with the smallest CSI-RS port index in the kth packet, wherein k is a natural number.

Preferably, the configuration indication information also carries correspondence information between each port of the QCL-CSI-RS and each port of the CSI-RS.

Preferably, the correspondence information is one of: each CSI-RS port corresponds to each QCL-CSI-RS port; and grouping the CSI-RS ports corresponding to each port of the QCL-CSI-RS.

Preferably, the QCL-CSI-RS is transmitted on different orthogonal frequency division multiplexing symbols or on different time slots or on subframes or time slots separated from the CSI-RS by more than a first predetermined threshold.

Preferably, the time interval between transmitting the QCL-CSI-RS and transmitting the CSI-RS is less than a second preset threshold.

Preferably, subframe offset of the CSI-RS and the QCL-CSI-RS is agreed with the terminal in advance, and the K ports with the smallest indexes of the QCL-CSI-RS and the CSI-RS occupy the same resource position by default, wherein the subframe offset is not 0 and K is a positive integer.

Preferably, the transmission period of the QCL-CSI-RS is CSI-X times the transmission period of the RS, wherein X ═ 2ⁿAnd n is a natural number.

Preferably, the QCL-CSI-RS and the CSI-RS use the same sequence.

Preferably, the method further comprises: and enabling the ZP CSI-RS to cover the resource elements RE corresponding to the QCL-CSI-RS by configuring a zero-power ZP CSI-RS, or enabling at least one set of NZP CSI-RS to cover the RE corresponding to the QCL-CSI-RS by configuring a non-zero-power NZP CSI-RS.

Preferably, the QCL-CSI-RS is sent on part of the available bandwidth, and carries the transmission band indication information of the QCL-CSI-RS in the configuration indication information.

Preferably, after configuring the corresponding QCL-CSI-RS for the CSI-RS, the method further includes: receiving frequency offset information fed back by a terminal; and performing re-phase-locking processing on the crystal oscillator based on the frequency offset information, or performing frequency offset pre-calibration when CSI-RS and/or DMRS are transmitted.

According to another aspect of the present invention, a method of determining a quasi-co-location is provided.

The method for determining the quasi-co-location comprises the following steps: receiving CSI-RS information configured by network side equipment and QCL-CSI-RS configuration information configured for each set of CSI-RS; determining resource positions of the CSI-RS and the QCL-CSI-RS according to the CSI-RS information and the QCL-CSI-RS configuration information; and jointly estimating the large-scale characteristic parameters of the channel by using the CSI-RS reference signals received at the CSI-RS resource positions and the QCL-CSI-RS reference signals received at the QCL-CSI-RS resource positions.

Preferably, before performing the joint estimation of the large-scale characteristic parameters of the channel, the method further includes: reference signals of the default QCL-CSI-RS port are transmitted on part or all of the ports used by the CSI-RS.

Preferably, the default QCL-CSI-RS transmitting on part or all of the ports used by the CSI-RS comprises one of: when the number of the ports of the QCL-CSI-RS is 1, a reference signal of a default QCL-CSI-RS port 0 is transmitted on a port 0 of the CSI-RS; when QCL-CSI-RS portWhen the number is 2, the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively transmitted on the CSI-RS port 0 and the CSI-RS port 1; or, the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RS

And transmitting, wherein N is the port number of the CSI-RS and N is a positive integer.

Preferably, the receiving the CSI-RS information and the QCL-CSI-RS configuration information comprises: acquiring port number information of the QCL-CSI-RS from the QCL-CSI-RS configuration indication information, wherein the port number information is used for implicitly indicating QCL grouping information in the CSI-RS and is determined by the QCL grouping quantity of the CSI-RS; and determining the QCL grouping mode of the CSI-RS according to the configuration indication information.

Preferably, the determining the QCL grouping mode of the CSI-RS according to the configuration indication information includes one of: when the number of the ports of the QCL-CSI-RS is 1, all the ports of the default CSI-RS meet the QCL relationship; defaulting a port group of all ports of the CSI-RS when the number of ports of the QCL-CSI-RS is 2

All satisfy QCL relationship, port group

The reference signals of the QCL-CSI-RS port 0 are sent on the port 0 of the CSI-RS by default, and the reference signals of the QCL-CSI-RS port 1 are sent on the port 0 of the CSI-RS by default

And c, wherein N is a positive integer.

Preferably, the default QCL-CSI-RS has a number of ports less than or equal to 2.

Preferably, the receiving the CSI-RS information and the QCL-CSI-RS configuration information comprises: acquiring port number information of the QCL-CSI-RS and corresponding relation information of each port of the QCL-CSI-RS and each port of the CSI-RS from the QCL-CSI-RS configuration indication information; and determining the QCL grouping condition of the CSI-RS and the ports of the CSI-RS corresponding to the reference signal transmission of each port of the QCL-CSI-RS according to the port number information and the corresponding relation information.

Preferably, determining the QCL grouping condition of the CSI-RS and the ports of the CSI-RS corresponding to the reference signal transmission of each port of the QCL-CSI-RS according to the port number information and the correspondence information includes one of: when the corresponding relation information indicates that the CSI-RS ports carrying the reference signals of the QCL-CSI-RS ports are available, the CSI-RS ports meeting QCL characteristics in the CSI-RS are defaulted to be continuous-index CSI-RS ports, and the determining method of the k-th group of CSI-RS ports meeting the QCL characteristics is as follows: determining a CSI-RS port P corresponding to a QCL-CSI-RS port k_kAnd determining the CSI-RS port P corresponding to the QCL-CSI-RS port k +1_k+1And the k-th group of CSI-RS meeting QCL characteristics has P as port_k～P_k+1-1; when the k of the QCL-CSI-RS port is the maximum port index of the QCL-CSI-RS, the k-th group of CSI-RS ports meeting the QCL characteristics is P_kN, wherein N is the port number of the CSI-RS, k is a natural number, and N is a positive integer; and when the corresponding relation information indicates the port grouping information of each CSI-RS meeting the QCL characteristics, the reference signal on the default QCL-CSI-RS port k is transmitted on the port with the minimum CSI-RS port index in the kth grouping.

Preferably, the method further comprises: resource elements RE corresponding to QCL-CSI-RS for default transmission are covered by Zero Power (ZP) CSI-RS.

Preferably, the determining of the QCL-CSI-RS configuration information in a pre-agreed manner or by means of signaling resolution includes at least one of: resource configuration indication information, QCL-CSI-RS port number information, scrambling code ID information, subframe configuration information, relative subframe configuration information and mapping frequency band indication information; the relative subframe configuration information includes at least one of: the subframe offset or the time slot offset of the QCL-CSI-RS relative to the CSI-RS and the period of the QCL-CSI-RS relative to the CSI-RS.

Preferably, after jointly estimating the large-scale feature parameter information, the method further includes: after the frequency offset is jointly estimated according to the QCL-CSI-RS reference signals and the CSI-RS reference signals, the frequency offset estimation result is fed back to the network side equipment.

According to one aspect of the invention, a quasi co-located configuration device is provided.

The quasi-co-location configuration device comprises the following components: the acquisition module is used for acquiring all currently configured CSI-RSs; the first configuration module is used for configuring corresponding QCL-CSI-RSs for each set of CSI-RSs in all the CSI-RSs respectively, and configuring all the CSI-RSs and the QCL-CSI-RSs corresponding to the sets of CSI-RSs to the terminal, wherein the QCL-CSI-RSs are used for jointly estimating large-scale characteristic parameters of a channel with the CSI-RSs.

Preferably, the above apparatus further comprises: and the sending module is used for sending the corresponding QCL-CSI-RS on part or all of the ports used by the CSI-RS.

Preferably, the sending module is configured to perform sending operation according to one of the following manners: the QCL-CSI-RS only supports 1 port by default, and a reference signal of a port 0 of the QCL-CSI-RS is transmitted on a port 0 of the CSI-RS; the QCL-CSI-RS supports 2 ports at maximum by default, and when the number of the QCL-CSI-RS ports is 1, a reference signal of a QCL-CSI-RS port 0 is transmitted on a port 0 of the CSI-RS; when the number of the QCL-CSI-RS ports is 2, reference signals of a QCL-CSI-RS port 0 and a QCL-CSI-RS port 1 are respectively transmitted on a CSI-RS port 0 and a CSI-RS port 1; or, the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RSAn uplink transmission, where N is the number of ports of the CSI-RS and N is a positive integer,

represents rounding up x; the QCL-CSI-RS only supports 2 ports by default, and reference signals of a port 0 and a port 1 of the QCL-CSI-RS are respectively transmitted on the port 0 and the port 1 of the CSI-RS; or, the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RS

indicating rounding up x.

Preferably, the above apparatus further comprises: a first indication module, configured to indicate parameter configuration information of the QCL-CSI-RS to the terminal, where the parameter configuration information includes at least one of: resource configuration indication information, QCL-CSI-RS port number information, scrambling code ID information, subframe configuration information, relative subframe configuration information and mapping frequency band indication information; the relative subframe configuration information includes at least one of: the subframe offset or the time slot offset of the QCL-CSI-RS relative to the CSI-RS and the period of the QCL-CSI-RS relative to the CSI-RS.

Preferably, the above apparatus further comprises: and the second indicating module is used for sending configuration indicating information of the QCL-CSI-RS to the terminal, wherein the configuration indicating information carries port number information of the QCL-CSI-RS, the port number information is used for implicitly indicating QCL grouping information in the CSI-RS and is determined by the QCL grouping quantity of the CSI-RS, and the QCL grouping information is used for grouping the ports when all the ports in the CSI-RS cannot meet QCL characteristics, and dividing the ports meeting the QCL characteristics into the same group.

Preferably, the transmitting module is further configured to transmit the reference signal on the QCL-CSI-RS port k on the port with the smallest CSI-RS port index in the kth packet, where k is a natural number.

Preferably, the above apparatus further comprises: the first processing module is used for presetting subframe offset of the CSI-RS and the QCL-CSI-RS with the terminal and defaulting that K ports with the smallest indexes of the QCL-CSI-RS and the CSI-RS occupy the same resource position, wherein the subframe offset is not 0 and K is a positive integer.

Preferably, the transmission period of the QCL-CSI-RS is X times the transmission period of the CSI-RS, where X is 2ⁿAnd n is a natural number.

Preferably, the QCL-CSI-RS and the CSI-RS use the same sequence.

Preferably, the above apparatus further comprises: a second configuration module to configure a Zero Power (ZP) CSI-RS such that the ZP CSI-RS covers resource elements REs corresponding to the QCL-CSI-RS, or to configure a non-zero power (NZP) CSI-RS such that at least one set of the NZP CSI-RSs covers REs corresponding to the QCL-CSI-RS.

Preferably, the above apparatus further comprises: the receiving module is used for receiving frequency offset information fed back by the terminal; and the second processing module is used for performing re-phase-locking processing on the crystal oscillator based on the frequency offset information or performing frequency offset pre-calibration when CSI-RS and/or DMRS are transmitted.

According to another aspect of the invention, a quasi co-location determination apparatus is provided.

The quasi-co-location determination device according to the embodiment of the invention comprises: the receiving module is used for receiving the CSI-RS information configured by the network side equipment and the QCL-CSI-RS configuration information configured for each set of CSI-RS; the first determining module is used for determining resource positions of the CSI-RS and the QCL-CSI-RS according to the CSI-RS information and the QCL-CSI-RS configuration information; and the estimation module is used for jointly estimating the large-scale characteristic parameter information of the channel by using the CSI-RS reference signals received at the CSI-RS resource positions and the QCL-CSI-RS reference signals received at the QCL-CSI-RS resource positions.

Preferably, the above apparatus further comprises: and the second determining module is used for transmitting the reference signals of the default QCL-CSI-RS port on part or all of the ports used by the CSI-RS.

Preferably, the second determining module is configured to perform one of the following operations: when the number of the ports of the QCL-CSI-RS is 1, a reference signal of a default QCL-CSI-RS port 0 is transmitted on a port 0 of the CSI-RS; when the number of the ports of the QCL-CSI-RS is 2, reference signals of the port 0 and the port 1 of the QCL-CSI-RS are respectively transmitted on the port 0 and the port 1 of the CSI-RS; or, the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RS

Preferably, the receiving module includes: the first obtaining unit is used for obtaining port number information of the QCL-CSI-RS from the QCL-CSI-RS configuration indication information, wherein the port number information is used for implicitly indicating QCL grouping information in the CSI-RS and is determined by the QCL grouping quantity of the CSI-RS; and the first determining unit is used for determining the QCL grouping mode of the CSI-RS according to the configuration indication information.

Preferably, the third determining module is configured to perform one of the following operations: when the number of the ports of the QCL-CSI-RS is 1, all the ports of the default CSI-RS meet the QCL relationship; defaulting a port group of all ports of the CSI-RS when the number of ports of the QCL-CSI-RS is 2

All satisfy QCL relationship, port group

And c, wherein N is a positive integer.

Preferably, the receiving module includes: the second acquisition unit is used for acquiring the port number information of the QCL-CSI-RS and the corresponding relation information of each port of the QCL-CSI-RS and each port of the CSI-RS; and the second determining unit is used for determining the QCL grouping condition of the CSI-RS and the ports of the CSI-RS corresponding to the reference signals of all the ports of the QCL-CSI-RS according to the port number information and the corresponding relation information.

Preferably, the fourth determining module is configured to perform one of the following operations: when the corresponding relation information indicates that the CSI-RS ports carrying the reference signals of the QCL-CSI-RS ports are available, the CSI-RS ports meeting QCL characteristics in the CSI-RS are defaulted to be continuous-index CSI-RS ports, and the determining method of the k-th group of CSI-RS ports meeting the QCL characteristics is as follows: determining a CSI-RS port P corresponding to a QCL-CSI-RS port k_kAnd determining the CSI-RS port P corresponding to the QCL-CSI-RS port k +1_k+1And the k-th group of CSI-RS meeting QCL characteristics has P as port_k～P_k+1-1; when the k of the QCL-CSI-RS port is the maximum port index of the QCL-CSI-RS, the k-th group of CSI-RS ports meeting the QCL characteristics is P_kN, wherein N is the port number of the CSI-RS, k is a natural number, and N is a positive integer; and when the corresponding relation information indicates the port grouping information of each CSI-RS meeting the QCL characteristics, the reference signal on the default QCL-CSI-RS port k is transmitted on the port with the minimum CSI-RS port index in the kth grouping.

Preferably, the above apparatus further comprises: and a fifth determining module, configured to cover the resource elements RE corresponding to the QCL-CSI-RS for default transmission by the ZP CSI-RS.

Preferably, the first determining module, configured to determine, according to a pre-agreed manner or through a signaling parsing manner, the QCL-CSI-RS configuration information includes at least one of: resource configuration indication information, QCL-CSI-RS port number information, scrambling code ID information, subframe configuration information, relative subframe configuration information and mapping frequency band indication information; the relative subframe configuration information includes at least one of: the subframe offset or the time slot offset of the QCL-CSI-RS relative to the CSI-RS and the period of the QCL-CSI-RS relative to the CSI-RS.

Preferably, the above apparatus further comprises: and the feedback module is used for feeding back the frequency offset estimation result to the network side equipment after jointly estimating the frequency offset according to the QCL-CSI-RS reference signal and the CSI-RS reference signal.

According to the embodiment of the invention, all the currently configured CSI-RSs are obtained; respectively configuring corresponding QCL-CSI-RSs for each set of CSI-RSs in all the CSI-RSs, wherein the QCL-CSI-RSs are used for jointly estimating large-scale characteristic parameters of the channel with the CSI-RSs; all the CSI-RSs and QCL-CSI-RSs corresponding to all sets of CSI-RSs are configured to the terminal, so that the problem that a solution for large-scale characteristic parameter estimation of cooperation UE in UDN is lacked in the related technology is solved, noise influence on the CSI-RSs when the CSI-RSs are used for frequency offset and frequency extension estimation can be avoided, and the CSI-RSs can be directly used as cell discovery signals.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic diagram of different port REs in a set of CSI-RS according to the related art;

FIG. 2 is a flow chart of a method of configuring quasi-co-location according to an embodiment of the invention;

FIG. 3 is a flow chart of a method of determining quasi-co-location according to an embodiment of the invention;

fig. 4 is a schematic diagram of performing QCL-CSI-RS configuration according to a preferred embodiment of the present invention;

FIG. 5 is a block diagram of a quasi-co-located configuration device according to an embodiment of the invention;

FIG. 6 is a block diagram of a quasi co-located configuration device in accordance with a preferred embodiment of the present invention;

FIG. 7 is a block diagram of a quasi-co-location determination apparatus according to an embodiment of the present invention;

FIG. 8 is a block diagram of a quasi-co-location determination apparatus in accordance with a preferred embodiment of the present invention;

fig. 9 is a schematic structural diagram of a system for QCL enhancement in cell virtualization according to a preferred embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Fig. 2 is a flow chart of a configuration method of quasi-co-location according to an embodiment of the invention. As shown in fig. 2, the method may include the following process steps:

step S202: acquiring all currently configured CSI-RSs;

step S204: and respectively configuring corresponding QCL-CSI-RSs for each set of CSI-RSs in all the CSI-RSs, wherein the QCL-CSI-RSs are used for jointly estimating large-scale characteristic parameters of the channel with the CSI-RSs.

Step S206: and configuring all the CSI-RSs and QCL-CSI-RSs corresponding to all sets of CSI-RSs to the terminal.

A solution for large-scale characteristic parameter estimation by cooperating UE in the UDN is lacked in the related technology. With the method shown in fig. 2, in order to solve the mobility problem in the UDN, the cell virtualization-based idea considers the estimation problem of the downlink large-scale parameters, especially the estimation problem of the frequency offset and the frequency extension parameters. By configuring paired QCL-CSI-RS information for each set of CSI-RS, the terminal can jointly estimate downlink large-scale parameter information, particularly frequency offset and frequency extension parameters in downlink large-scale parameters according to the CSI-RS and the QCL-CSI-RS.

It should be noted that the QCL-CSI-RS may also be referred to as joint parameter estimation CSI-RS, reference CSI-RS, and other equivalent names, which should not be construed as a limitation to the present invention.

In a preferred implementation, the channel large-scale characteristic parameter may include, but is not limited to, at least one of the following: frequency offset parameters and frequency extension parameters.

Preferably, after configuring the corresponding QCL-CSI-RS for the CSI-RS in step S204, the following operations may be further included:

step S1: and transmitting the corresponding QCL-CSI-RS on part or all of the ports used by the CSI-RS.

Preferably, in step S1, transmitting the corresponding QCL-CSI-RS on at least part or all of the ports used by the CSI-RS may include at least one of:

in the first mode, only 1 port is supported by QCL-CSI-RS by default, and the reference signal of a port 0 of the QCL-CSI-RS is transmitted on a port 0 of the CSI-RS.

And in the second mode, the QCL-CSI-RS supports 2 ports at maximum by default, and when the number of the QCL-CSI-RS ports is 1, a reference signal of a QCL-CSI-RS port 0 is transmitted on a CSI-RS port 0.

When the number of the QCL-CSI-RS ports is 2, reference signals of a QCL-CSI-RS port 0 and a QCL-CSI-RS port 1 are respectively transmitted on a CSI-RS port 0 and a CSI-RS port 1; or the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RS

An uplink transmission, where N is the number of ports of the CSI-RS and N is a positive integer, preferably N is an even number, and N is greater than or equal to 2,

indicating rounding up x.

The third method comprises the following steps: when the number of the ports of the CSI-RS is more than or equal to 2, the QCL-CSI-RS defaults to 2 ports, and reference signals of a port 0 and a port 1 of the default QCL-CSI-RS are respectively transmitted on the port 0 and the port 1 of the CSI-RS; or the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RS

An uplink transmission, where N is the number of ports of the CSI-RS and N is a positive integer, preferably N is an even number, and N is greater than or equal to 2,indicating rounding up.

The method is as follows: and the network side configures the corresponding relation between the number information of the ports of the QCL-CSI-RS and/or the reference signal transmission of each port of the QCL-CSI-RS and each port of the CSI-RS, and determines the CSI-RS port for transmitting the reference signal sequence of the QCL-CSI-RS port according to the corresponding relation.

Preferably, after configuring the corresponding QCL-CSI-RS for the CSI-RS in step S204, the following steps may be further included:

step S2: indicating parameter configuration information of the QCL-CSI-RS to the terminal, wherein the parameter configuration information comprises at least one of the following: resource configuration indication information, QCL-CSI-RS port number information, scrambling code Identification (ID) information, subframe configuration information, relative subframe configuration information and mapping frequency band indication information; the relative subframe configuration information includes at least one of: the subframe offset or the time slot offset of the QCL-CSI-RS relative to the CSI-RS and the period of the QCL-CSI-RS relative to the CSI-RS.

step S3: and sending configuration indication information of the QCL-CSI-RS to a terminal, wherein the configuration indication information carries port number information of the QCL-CSI-RS, the port number information is used for implicitly indicating QCL grouping information in the CSI-RS and is determined by the QCL grouping quantity of the CSI-RS, and the QCL grouping information is used for grouping the ports when all the ports in the CSI-RS cannot meet QCL characteristics, and dividing the ports meeting the QCL characteristics into the same group.

Preferably, in step S1, transmitting the corresponding QCL-CSI-RS on some or all of the ports used by the CSI-RS may further include: and transmitting a reference signal on a QCL-CSI-RS port k on a port with the smallest CSI-RS port index in the kth packet, wherein k is a natural number.

Preferably, the configuration indication information may also carry correspondence information between each port of the QCL-CSI-RS and each port of the CSI-RS.

Preferably, the correspondence information may be one of:

(1) each CSI-RS port corresponds to each QCL-CSI-RS port;

(2) and grouping the CSI-RS ports corresponding to each port of the QCL-CSI-RS.

Preferably, the QCL-CSI-RS and the CSI-RS are transmitted on different orthogonal frequency division multiplexing symbols or on different time slots or are greater than the first predetermined threshold.

Preferably, the transmission period of the QCL-CSI-RS is X times the transmission period of the CSI-RS, where X is 2ⁿAnd n is a natural number. For example:

the transmission period of the QCL-CSI-RS is 1 time of that of the CSI-RS; or,

the transmission period of the QCL-CSI-RS is 2 times of that of the CSI-RS; or,

the transmission period of the QCL-CSI-RS is 4 times that of the CSI-RS; or,

the transmission period of the QCL-CSI-RS is 8 times that of the CSI-RS.

In a preferred implementation, the QCL-CSI-RS and the CSI-RS use the same sequence.

Preferably, the above method may further comprise the operations of:

step S4: the ZP CSI-RS is configured to cover the RE corresponding to the QCL-CSI-RS, or the NZP CSI-RS is configured to cover the RE corresponding to the QCL-CSI-RS by at least one set of the NZP CSI-RSs.

Preferably, the QCL-CSI-RS may be transmitted on a part of available bandwidth, and the transmission band indication information of the QCL-CSI-RS is carried in the configuration indication information.

step S5: receiving frequency offset information fed back by a terminal;

step S6: and performing re-phase-locking processing on the crystal oscillator based on the frequency offset information, or performing frequency offset pre-calibration when the CSI-RS and/or the demodulation reference signal DMRS are transmitted.

Fig. 3 is a flow chart of a method of determining quasi-co-location according to an embodiment of the invention. As shown in fig. 3, the method may include the following process steps:

step S302: receiving CSI-RS information configured by network side equipment and QCL-CSI-RS configuration information configured for each set of CSI-RS;

step S304: determining resource positions of the CSI-RS and the QCL-CSI-RS according to the CSI-RS information and the QCL-CSI-RS configuration information;

step S306: and jointly estimating large-scale characteristic parameter information by using the CSI-RS reference signals received at the CSI-RS resource positions and the QCL-CSI-RS reference signals received at the QCL-CSI-RS resource positions.

In a preferred implementation, the channel large-scale characteristic parameter may include, but is not limited to, at least one of the following:

frequency offset parameters and frequency extension parameters.

Preferably, before determining the resource locations of the CSI-RS and the QCL-CSI-RS in step S302, the following operations may be further included:

step S7: the default QCL-CSI-RS transmits on some or all of the ports used by the CSI-RS.

Preferably, in step S7, the default QCL-CSI-RS transmitting on part or all of the ports used by the CSI-RS may include one of the following ways:

in the first mode, under the condition that the QCL-CSI-RS only supports 1 port by default, the reference signal of the QCL-CSI-RS port 0 is transmitted on the CSI-RS port 0.

In the second mode, under the condition that the default QCL-CSI-RS supports 2 ports at most, and under the condition that the number of QCL-CSI-RS ports is 1, a reference signal of a QCL-CSI-RS port 0 is transmitted on a CSI-RS port 0; when the number of QCL-CSI-RS ports is 2, reference signals of a default QCL-CSI-RS port 0 and a port 1 are setRespectively transmitting on a port 0 and a port 1 of the CSI-RS; or the reference signals of the default QCL-CSI-RS port 0 and the default QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RSAn uplink transmission, where N is the number of ports of the CSI-RS and N is a positive integer, preferably N is an even number, and N is greater than or equal to 2,

indicating rounding up.

In a third mode, when the default QCL-CSI-RS is 2 ports, reference signals of a port 0 and a port 1 of the default QCL-CSI-RS are respectively transmitted on the port 0 and the port 1 of the CSI-RS; or the reference signals of the default QCL-CSI-RS port 0 and the default QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RS

indicating rounding up.

The method is as follows: the terminal receives the corresponding relation between the number information of the ports of the QCL-CSI-RS configured by the network side and/or the reference signal transmission of each port of the QCL-CSI-RS and each port of the CSI-RS, and determines the CSI-RS port corresponding to the reference signal transmission of the QCL-CSI-RS according to the number information of the ports of the QCL-CSI-RS and/or the corresponding relation information of each port of the CSI-RS.

When the number of the QCL-CSI-RS ports is larger than or equal to 2, the number of the terminal default CSI-RS ports must not be smaller than the number of the QCL-CSI-RS ports.

Preferably, the receiving the CSI-RS information and the QCL-CSI-RS configuration information at step S302 may include the steps of:

step S8: acquiring port number information of the QCL-CSI-RS from configuration indication information of the QCL-CSI-RS, wherein the port number information is used for implicitly indicating QCL grouping information in the CSI-RS and is determined by the QCL grouping quantity of the CSI-RS;

step S9: and determining the QCL grouping mode of the CSI-RS according to the configuration indication information.

Preferably, in step S9, determining the QCL grouping manner of the CSI-RS according to the configuration indication information may include one of the following manners:

in the first mode, when the number of the ports of the QCL-CSI-RS is 1, all the ports of the default CSI-RS meet the QCL relationship;

and secondly, when the number of the ports of the QCL-CSI-RS is 2, all port groups 0-N/2-1 in all the ports of the default CSI-RS meet the QCL relationship, all the port groups N/2-N-1 meet the QCL relationship, the two port groups do not meet the QCL relationship, meanwhile, a reference signal of the port 0 of the default QCL-CSI-RS is sent on the port 0 of the CSI-RS, and a reference signal of the port 1 of the QCL-CSI-RS is sent on the port N/2 of the CSI-RS, wherein N is a positive integer.

Preferably, in step S302, receiving the CSI-RS information and the QCL-CSI-RS configuration information may include the following operations:

step S10: acquiring port number information of the QCL-CSI-RS and corresponding relation information of each port of the QCL-CSI-RS and each port of the CSI-RS from the QCL-CSI-RS configuration indication information;

step S11: and determining the QCL grouping condition of the CSI-RS and the ports of the CSI-RS corresponding to the reference signal transmission of each port of the QCL-CSI-RS according to the port number information and the corresponding relation information.

Preferably, in step S11, determining the QCL grouping condition of the CSI-RS and the ports of the CSI-RS corresponding to the reference signals of the ports of the QCL-CSI-RS according to the port number information and the correspondence information may include one of the following manners:

in the first mode, when the corresponding relation information indicates that the CSI-RS ports bear reference signals of all QCL-CSI-RS ports, the CSI-RS ports meeting QCL characteristics in the CSI-RS are defaulted to be CSI-RS ports with continuous indexes, wherein the k-th group of CSI-RS ports meeting the QCL characteristics is determined by the following method: determining a CSI-RS port P corresponding to a QCL-CSI-RS port k_kAnd determining the CSI-RS port P corresponding to the QCL-CSI-RS port k +1_k+1And the k-th group of CSI-RS meeting QCL characteristics has P as port_k～P_k+1-1; when the k of the QCL-CSI-RS port is the maximum port index of the QCL-CSI-RS, the k-th group of CSI-RS ports meeting the QCL characteristics is P_kN, wherein N is the port number of the CSI-RS, k is a natural number, and N is a positive integer.

And secondly, when the corresponding relation information indicates the port grouping information of each CSI-RS meeting the QCL characteristics, the reference signal on the default QCL-CSI-RS port k is transmitted on the port with the minimum CSI-RS port index in the kth grouping.

Preferably, the above method may further comprise the steps of:

step S12: resource elements RE corresponding to QCL-CSI-RS which are transmitted by default are covered by ZP CSI-RS with zero power.

Preferably, in step S302, it may be determined that the QCL configuration information includes at least one of the following in a pre-agreed manner or by means of signaling resolution:

(1) resource configuration indication information;

(2) QCL-CSI-RS port number information;

(3) scrambling code identification ID information;

(4) subframe configuration information;

(5) relative subframe configuration information;

(6) mapping band indication information;

the relative subframe configuration information may include, but is not limited to, at least one of the following: the subframe offset or the time slot offset of the QCL-CSI-RS relative to the CSI-RS and the period of the QCL-CSI-RS relative to the CSI-RS.

Preferably, in step S304, after jointly estimating the large-scale feature parameter information, the following operations may be further included:

step S13: after the frequency offset is jointly estimated according to the QCL-CSI-RS reference signals and the CSI-RS reference signals, the frequency offset estimation result is fed back to the network side equipment.

The above preferred embodiment will be further described with reference to the first to eighth preferred embodiments.

Preferred embodiment 1

In order to enable the terminal to make full use of the CSI-RS to effectively estimate the large-scale characteristic parameters of the channel, the preferred embodiment provides a method for configuring QCL-CSI-RS for each set of CSI-RS. Based on the method, the network side equipment configures corresponding QCL-CSI-RS for each set of configured CSI-RS, and configures the relevant information of the QCL-CSI-RS to the terminal.

When configuring the QCL-CSI-RS for the CSI-RS, in an embodiment, the network side device may determine the resource location, the subframe/slot location, and the period information of the QCL-CSI-RS with reference to the CSI-RS usage of the surrounding cells. For example: fig. 4 is a schematic diagram of performing QCL-CSI-RS configuration according to a preferred embodiment of the present invention. As shown in fig. 4, the resource location corresponding to the CSI-RS of the target cell is

The indicated CSI-RS configurations of RE, neighbor cell #1 and neighbor cell #2 are

And

corresponding position, QCL-CSI-RS may be configured at the position where no collision occurs with the neighboring cell #1 or the neighboring cell #2, as shown in the figure

The position shown. In some application scenarios, for example, in the UDN, a target cell may have a plurality of neighboring cells, and at this time, the QCL-CSI-RS may be configured to other subframes according to the CSI-RS usage of the neighboring cells; or when the number of CSI-RS ports between Macro cells and small cells is different, or when the number of CSI-RS ports between small cells is different, the problem of the misalignment of the reuse factors of the CSI-RS can be caused, and at the moment, the resources which are difficult to be directly used as the NZP CSI-RS configuration can be selected as the QCL-CSI-RS configuration.

However, it should be noted that the location of the QCL-CSI-RS needs to satisfy, but is not limited to, at least one of the following conditions:

the first condition is that the QCL-CSI-RS and the CSI-RS are not transmitted on the same OFDM symbol or the same time slot at least, or the time interval between the QCL-CSI-RS and the corresponding CSI-RS is larger than or equal to a first preset threshold value. The benefits of this are: the influence of noise can be suppressed better.

And in the second condition, the time interval between the QCL-CSI-RS and the corresponding CSI-RS is less than or equal to a second preset threshold value. The benefits of this are: a larger range of frequency offset estimation can be supported.

In another preferred embodiment, when configuring the QCL-CSI-RS, the network side device may further determine the relative position relationship of the QCL-CSI-RS according to the speed of the terminal or the potential frequency offset range estimation. For example: when the terminal has a high moving speed and/or the current receiving and transmitting double-transmission has a large frequency offset, the network side equipment should configure the QCL-CSI-RS on the same subframe or similar subframes as the CSI-RS as much as possible when configuring the QCL-CSI-RS; when the terminal has a low moving speed and/or the current receiving and transmitting dual-transmission has a low frequency offset, the network side device should configure the QCL-CSI-RS on a subframe different from or a subframe far away from the QCL-CSI-RS as much as possible when configuring the QCL-CSI-RS;

when the network side device sends the QCL-CSI-RS, the QCL-CSI-RS may be sent on a part or all of the same ports as the CSI-RS, and the terminal may be instructed to send the CSI-RS port used by the QCL-CSI-RS in a predetermined manner or in a signaling manner.

In order to enable the terminal to determine the specific configuration information of the QCL-CSI-RS, the QCL-CSI-RS configured by the network side device for the terminal should include at least one of the following information:

(1) resource configuration indication information;

(2) QCL-CSI-RS port number information;

(3) scrambling code ID information;

(4) subframe configuration information;

(5) relative subframe configuration information;

wherein the relative subframe configuration information should at least include at least one of the following configuration information of the QCL-CSI-RS with respect to the CSI-RS: subframe offset or slot offset relative to the CSI-RS, periodicity relative to the CSI-RS. Preferably, the period of the QCL-CSI-RS is greater than or equal to the period of the CSI-RS, and the relative period multiple relation value is preferably one or more of 1/2/4/8/16/32.

And the network side equipment configures the configuration information of the QCL-CSI-RS corresponding to each set of CSI-RS to the terminal. Then, the terminal can jointly perform channel large-scale characteristic parameter estimation at least with frequency offset and frequency expansion according to the received CSI-RS and QCL-CSI-RS information corresponding to the CSI-RS.

Based on the preferred embodiment, the terminal can estimate the large-scale parameters of the channel according to the CSI-RS and the QCL-CSI-RS corresponding to the CSI-RS, so that the problem that the existing CSI-RS pattern design is greatly influenced by noise when used for frequency offset and frequency extension estimation is solved. Meanwhile, the network side equipment can determine parameters such as resource positions, time slot or subframe configurations, period configurations and the like of the QCL-CSI-RS according to the CSI-RS configuration of surrounding cells and potential frequency offset conditions, so that collision between the configuration of the QCL-CSI-RS and the CSI-RS configuration of other surrounding cells is avoided as much as possible, and interference on the CSI-RS of the adjacent cells is reduced.

Preferred embodiment two

In the first preferred embodiment, the parameters of the relevant QCL-CSI-RS are notified to the terminal in a configuration manner, and certainly, the configuration of part of the parameters may also be performed by using a pre-agreed manner between the network side device and the terminal.

In the preferred embodiment, in a preferred embodiment, the reference signal sequence corresponding to each port of the QCL-CSI-RS and the reference signal sequence corresponding to each port of the CSI-RS are generated by the network side device and/or the terminal by default based on the same scrambling code ID. Based on the mode, when the QCL-CSI-RS parameters are configured for the terminal, the signaling cost for configuring the scrambling ID of the QCL-CSI-RS reference signal sequence can be saved.

In another preferred embodiment, the network side device and the terminal may default that the QCL-CSI-RS supports only 1 port, and default that the reference signal sequence of the QCL-CSI-RS is transmitted at port 0 of the CSI-RS (the first port of the CSI-RS, which corresponds to port 15 in LTE). The terminal can jointly estimate at least frequency offset and frequency expansion channel large-scale characteristic parameters according to the RE corresponding to the QCL-CSI-RS mapping and the RE corresponding to the CSI-RS port 0 mapping. At this time, the terminal defaults that all ports in the CSI-RS satisfy the QCL characteristics.

Or, the network side device and the terminal may default that the QCL-RS supports 2 ports at maximum, and carry port number information in the configuration information. When the number of the QCL-CSI-RS ports is 1, a reference signal of a default QCL-CSI-RS is transmitted on a port 0 of the CSI-RS; when the number of QCL-CSI-RS ports is 2, reference signals of port 0 and port 1 of the default QCL-CSI-RS are transmitted on port 0 and port 1 of the CSI-RS, respectively, or at port 0 of the CSI-RS,an uplink transmission, where N is the number of ports of the CSI-RS and N is a positive integer, preferably N is an even number, and N is greater than or equal to 2,

indicating rounding up. . At this time, the terminal may default that all ports in the CSI-RS satisfy the QCL characteristic; when the number of QCL-CSI-RS ports is 2, the estimation accuracy can also be improved by averaging the estimated characteristics on the two ports.

Or, the network side device and the terminal may fix the default QCL-RS as 2 ports, and the reference signals of the port 0 and the port 1 of the default QCL-CSI-RS are respectively transmitted on the port 0 and the port 1 of the CSI-RS, or at the port 0 of the CSI-RS,

indicating rounding up.

In another preferred embodiment, a subframe position relationship between the CSI-RS and the corresponding QCL-CSI-RS may be agreed in advance between the base station and the terminal, and the QCL-CSI-RS and K ports with the smallest CSI-RS index occupy the same resource position by default, where the subframe position relationship may include at least one of: and the QCL-CSI-RS is in subframe offset or time slot offset relative to the CSI-RS and in a periodic multiple relation relative to the CSI-RS. Preferably, the QCL-CSI-RS has a period greater than or equal to the period of the CSI-RS. And in an optimal mode, the CSI-RS and the corresponding QCL-CSI-RS are not at least positioned on the same time slot, wherein K represents the port number of the QCL-CSI-RS, and the value of K is 1 under the default condition.

In the preferred embodiment, the network side device may reduce the overhead of QCL-CSI-RS related parameter configuration signaling.

Preferred embodiment three

In the preferred embodiment, after the network side device has configured the QCL-CSI-RS for the terminal, the network side device needs to avoid REs occupied by the QCL-CSI-RS when performing data mapping. In order to avoid processing errors when the terminal de-maps the data resources or avoid complexity caused by determining the de-mapping of the data resources based on multiple signaling, in an embodiment, the network side device may configure the ZP CSI-RS (zero power CSI-RS) so that the ZP CSI-RS covers REs corresponding to the QCL-CSI-RS. Meanwhile, the RE of the QCL-CSI-RS is transmitted by the terminal by default and is covered by the ZP-CSI-RS. And the resource demapping problem does not need to be repeatedly considered based on the QCL-CSI-RS information.

In another preferred embodiment, the network side device configures a ZP CSI-RS (zero power CSI-RS), and the ZP CSI-RS does not cover the QCL-CSI-RS, but when configuring the NZP CSI-RS, one set of NZP CSI-RS (non-zero power CSI-RS) is made to contain REs corresponding to the QCL-CSI-RS. When the terminal de-maps data, the rate matching of the de-mapping data can be considered according to the NZP CSI-RS, and the resource de-mapping problem does not need to be considered repeatedly based on QCL-CSI-RS information.

In another preferred embodiment, when the network side device configures the ZP CSI-RS and the NZP CSI-RS, coverage of the QCL-CSI-RS does not need to be considered. And after receiving the QCL-CSI-RS configuration information number corresponding to the CSI-RS, the terminal additionally considers rate matching for de-mapping data aiming at the QCL-CSI-RS.

Preferred embodiment four

In the preferred embodiment, in order to reduce the influence of the configuration of the QCL-CSI-RS on the reuse factor and reduce the overhead problem caused by the configuration of the QCL-CSI-RS, the QCL-CSI-RS may be allowed to transmit on a part of bandwidth, and meanwhile, the configuration indication information of the QCL-CSI-RS carries the transmission band indication information of the QCL-CSI-RS.

Preferred embodiment five

Considering that when the cell virtualization configuration is performed in the UDN, since different small cells (or Pico, or transmission nodes (TPs) are transparent to the terminal), the network side device may flexibly select one or more small cells to jointly transmit data to the terminal. At this time, different CSI-RS ports in each set of CSI-RS are transmitted on different small cells. Therefore, different ports of the same set of CSI-RS no longer all satisfy the QCL relationship.

In the preferred embodiment, when the QCL-CSI-RS corresponding to the CSI-RS is configured, the information of the number of QCL-CSI-RS ports is required to be carried, and whether all the ports of the CSI-RS meet the QCL relationship is implicitly indicated through the number of the QCL-CSI-RS ports.

When the number of the QCL-CSI-RS ports is 1, all the ports of the CSI-RS are defaulted by the terminal to meet the QCL relation. And when the number of the QCL-CSI-RS ports is more than 1, the terminal cannot default that all the ports of the CSI-RS meet the QCL relationship.

In the preferred embodiment, the number of the network-side device and the default terminal QCL-CSI-RS port is at most 2, and when the number of the QCL-CSI-RS ports is 1, all the ports of the default terminal CSI-RS satisfy the QCL relationship. And when the number of the QCL-CSI-RS ports is 2, the reference signals of the

ports

0 and 1 of the default QCL-CSI-RS are respectively at the

ports

0 and 1 of the CSI-RSAnd sending, wherein N is the port number of the CSI-RS.

When the number of QCL-CSI-RS ports is 2, the terminal defaults the CSI-RS ports

The QCL relationship is satisfied and,CSI-RS port

QCL relationships are satisfied and are not satisfied between the two groups by default.

Based on the preferred embodiment, when the network side equipment is sent to the terminal based on the combination of 2 small cells, the method can support that at least frequency offset and frequency expansion parameters in the large-scale parameters of the channel corresponding to the CSI-RS and QCL-CSI-RS are estimated based on the CSI-RS and QCL-CSI-RS, thereby improving the channel estimation and detection performance under the condition of combined transmission.

Preferred embodiment six

In the fifth preferred embodiment, when only 2 small cell combinations are maximally supported to be sent to the terminal, at least the frequency offset and the frequency spreading parameter in the channel large-scale parameters corresponding to the CSI-RS and QCL-CSI-RS estimation are estimated based on the frequency offset and the frequency spreading parameter.

In the preferred embodiment, the QCL-CSI-RS configuration indication information carries port number information, and the port number implicitly indicates QCL grouping information in the CSI-RS and is determined by the QCL grouping number of the CSI-RS, wherein the QCL grouping information in the CSI-RS means that when all ports in the CSI-RS cannot meet the QCL characteristics, the ports can be grouped, so that the ports meeting the QCL characteristics are located in the same group.

In the preferred embodiment, a plurality of QCL-CSI-RS ports may be supported, and port correspondence information between each of the QCL-CSI-RS ports and the CSI-RS is included in the QCL-CSI-RS configuration indication information, where the port correspondence between each of the QCL-CSI-RS ports and the CSI-RS indicates a CSI-RS port corresponding to each of the QCL-CSI-RS ports.

In order to be able to describe this preferred embodiment more clearly, the following will be exemplified:

assuming that the number of the CSI-RS ports is 8 and 2 ports are configured in the QCL-CSI-RS, it means that two groups of ports in the CSI-RS satisfy the QCL relationship. And when the QCL-CSI-RS configuration indication is carried out, indicating which port of the CSI-RS each port of the QCL-CSI-RS respectively transmits. If the corresponding relation between each QCL-CSI-RS port and each CSI-RS port is as follows: the QCL-CSI-RS port 0 corresponds to the CSI-RS port 0, the QCL-CSI-RS port 1 corresponds to the CSI-RS port 4, and therefore the CSI-RS ports 0-3 meet the QCL relation, and the CSI-RS ports 4-7 meet the QCL relation; the two groups do not satisfy QCL relationship, and a reference signal of a terminal default QCL-CSI-RS port 0 is sent at the CSI-RS port 0; QCL-CSI-RS port 1 transmits on CSI-RS port 4.

If 3 ports are configured in the QCL-CSI-RS, 3 groups of ports in the CSI-RS satisfy a QCL relationship, and when the QCL-CSI-RS configuration indication is carried out, if the corresponding relationship between each indicated QCL-CSI-RS port and the CSI-RS port is as follows: the QCL-CSI-RS port 0 corresponds to the CSI-RS port 0, the QCL-CSI-RS port 1 corresponds to the CSI-RS port 4, the QCL-CSI-RS port 2 corresponds to the CSI-RS port 6, it means that the CSI-RS ports 0-3 meet QCL relations, the CSI-RS ports 4-5 meet QCL relations, the CSI-RS ports 6-7 meet the QCL relations, the QCL relations are not met among the 3 groups, and a reference signal of the QCL-CSI-RS port 0 is sent at the CSI-RS port 0 by default at the terminal; QCL-CSI-RS port 1 transmits on CSI-RS port 4 and QCL-CSI-RS port 2 transmits on CSI-RS port 6.

Based on the preferred embodiment, the terminal defaults the CSI-RS port meeting QCL in the CSI-RS to be the CSI-RS port with continuous indexes. The method for determining the k-th group of CSI-RS meeting QCL comprises the following steps: determining CSI-RS port P corresponding to QCL-CSI-RS port k_kDetermining the CSI-RS port P corresponding to the QCL-CSI-RS port k +1_k+1If the k-th set of CSI-RS satisfying QCL is P_k～P_k+1-1, wherein when port k is the largest port index of QCL-CSI-RS, the k-th set of CSI-RS satisfying QCL is P_kN, wherein N is the port number of the CSI-RS.

Compared with the fifth preferred embodiment, the preferred embodiment provided by the preferred embodiment can more flexibly support the network side device to perform joint transmission based on multiple small cells. Flexibility is provided for adjusting the network side equipment according to the actual situation.

Preferred embodiment seven

In the fifth preferred embodiment, when only 2 small cell combinations are maximally supported to be sent to the terminal, at least the frequency offset and the frequency spreading parameter in the channel large-scale parameters corresponding to the CSI-RS and QCL-CSI-RS estimation are estimated based on the frequency offset and the frequency spreading parameter. In the sixth preferred embodiment, joint transmission of multiple small cells can be supported, but the terminal is required to assume that the CSI-RS port satisfying the QCL in the CSI-RS is the CSI-RS port with continuous index.

In the preferred embodiment, the QCL-CSI-RS configuration indication information carries port number information, and the port number implicitly indicates QCL grouping information in the CSI-RS and is determined by the QCL grouping information of the CSI-RS, where the QCL grouping information in the CSI-RS means that when all ports in the CSI-RS cannot meet QCL characteristics, the ports are grouped so that the ports meeting the QCL characteristics are located in the same group.

In the preferred embodiment, multiple QCL-CSI-RS ports may be supported and the corresponding CSI-RS port groups for each port of the QCL-CSI-RS are indicated. At this time, when the network side sends the QCL-CSI-RS, a reference signal on a QCL-CSI-RS port k is sent on a port with the smallest CSI-RS port index in the kth QCL group, and the QCL-CSI-RS configuration indication information comprises information of corresponding relations between ports of the QCL-CSI-RS and ports of the CSI-RS. For example:

still assume the number of CSI-RS ports is 8; the QCL-CSI-RS is configured with 2 ports, namely two groups of ports in the CSI-RS meet the QCL relationship, and when the configuration indicates the corresponding relationship between each port of the QCL-CSI-RS and the port of the CSI-RS, the CSI-RS port group corresponding to each QCL-CSI-RS port is explicitly indicated; for example: the QCL-CSI-RS port 0 corresponds to a port {0123} of the CSI-RS, and the QCL-CSI-RS port 1 corresponds to a port {4567} of the CSI-RS, so that the two groups of ports of the CSI-RS respectively meet the QCL relationship, and a reference signal on the QCL-CSI-RS port is transmitted on a port with the smallest CSI-RS port index in the kth QCL group, namely the reference signal on the port 0 is transmitted on the CSI-RS port 0, and the reference signal on the QCL-CSI-RS port 1 is transmitted on the CSI-RS port 4.

Based on the preferred embodiment, different port grouping relations of the terminal CSI-RS can be indicated through clear signaling, and the flexibility of QCL port configuration in the CSI-RS is further improved at the cost of partial additional signaling.

Preferred embodiment eight

In the QCL-CSI-RS configured in the preferred embodiment, the terminal measures at least one of frequency offset and frequency expansion large-scale parameters on one or more QCL-CSI-RS ports by combining the QCL-CSI-RS and the corresponding CSI-RS, and feeds back the measured frequency offset parameter to the network side device. And the network side equipment performs frequency offset calibration on the small cell or performs frequency offset and correction when sending a signal based on the feedback of the terminal.

In a preferred embodiment, when the terminal performs frequency offset parameter feedback, the terminal directly feeds back to a node established by Radio Resource Control (RRC) connection, and the node sends frequency offset calibration information to other nodes to be corrected.

In another preferred embodiment, the RRC connection establishing node or the centralized control node notifies the relevant smallcell to receive the feedback information of the terminal, and performs respective correction based on the frequency offset calibration information fed back by the terminal.

When the terminal performs frequency offset information feedback, the terminal may perform feedback periodically through a Physical Uplink Control Channel (PUCCH), or perform feedback aperiodically or event-triggered feedback based on a Physical Uplink Shared Channel (PUSCH).

Fig. 5 is a block diagram of a quasi-co-located configuration device according to an embodiment of the invention. As shown in fig. 5, the quasi-co-located configuration means may include: an obtaining module 100, configured to obtain all currently configured CSI-RSs; the first configuration module 102 is configured to configure corresponding QCL-CSI-RSs for each set of CSI-RS in all CSI-RSs, and configure all CSI-RSs and the QCL-CSI-RSs corresponding to each set of CSI-RSs to the terminal, where the QCL-CSI-RSs are used to jointly estimate large-scale characteristic parameters of a channel with the CSI-RSs.

By adopting the device shown in fig. 5, the problem that a solution for large-scale characteristic parameter estimation by cooperating with the UE in the UDN is lacking in the related art is solved, so that the noise influence on the CSI-RS when used for frequency offset and frequency extension estimation is avoided, and the CSI-RS can be directly used as a cell discovery signal.

frequency offset parameters and frequency extension parameters.

Preferably, as shown in fig. 6, the apparatus may further include: a sending module 104, configured to send the corresponding QCL-CSI-RS on some or all ports used by the CSI-RS.

Preferably, the sending module 104 is configured to perform a sending operation according to one of the following manners: the first method is as follows: the QCL-CSI-RS only supports 1 port by default, and a reference signal of a port 0 of the QCL-CSI-RS is transmitted on a port 0 of the CSI-RS at the moment; the second method comprises the following steps: when the number of the CSI-RS ports is larger than or equal to 2, the QCL-CSI-RS defaults to support 2 ports at the maximum and indicates the information of the number of the QCL-CSI-RS ports, and at the moment, when the number of the QCL-CSI-RS ports is 1, a reference signal of a QCL-CSI-RS port 0 is sent on a CSI-RS port 0; when the number of the QCL-CSI-RS ports is 2, transmitting a reference signal of a QCL-CSI-RS port 0 and a reference signal of a QCL-CSI-RS port 1 on a port 0 and a port 1 of a CSI-RS respectively; or the reference signal of the QCL-CSI-RS port 0 and the reference signal of the QCL-CSI-RS port 1 are respectively arranged at the port 0 and the port 1 of the CSI-RS

The uplink transmission is performed, wherein N is the port number of the CSI-RS and is a positive integer; the third method comprises the following steps: the QCL-CSI-RS only supports 2 ports by default, and reference signals of a QCL-CSI-RS port 0 and reference signals of a QCL-CSI-RS port 1 are respectively arranged at a port 0 and a port 1 of the CSI-RS

Sending the data upwards; the method is as follows: and the network side configures the number information of the ports of the QCL-CSI-RS and/or the corresponding relation between each port of the QCL-CSI-RS and each port of the CSI-RS, and determines the CSI-RS port for transmitting the reference signal sequence of the QCL-CSI-RS port according to the corresponding relation.

Preferably, as shown in fig. 6, the apparatus may further include: a first indication module 106, configured to indicate, to the terminal, the QCL-CSI-RS parameter configuration information and the CSI-RS parameter configuration information, where the QCL-CSI-RS parameter configuration information includes at least one of: resource configuration indication information, QCL-CSI-RS port number information, scrambling code ID information, subframe configuration information, relative subframe configuration information and mapping frequency band indication information; the relative subframe configuration information includes at least one of: the subframe offset or the time slot offset of the QCL-CSI-RS relative to the CSI-RS and the period of the QCL-CSI-RS relative to the CSI-RS.

Preferably, as shown in fig. 6, the apparatus may further include: the second indication module 108 is configured to send configuration indication information of the QCL-CSI-RS to the terminal, where the configuration indication information carries port number information of the QCL-CSI-RS, the port number information is used to implicitly indicate QCL grouping information in the CSI-RS and is determined by a QCL grouping number of the CSI-RS, and the QCL grouping information is used to indicate that when all ports in the CSI-RS cannot meet QCL characteristics, the ports are grouped, and the ports meeting the QCL characteristics are divided into the same group.

Preferably, the transmitting module 104 is further configured to transmit the reference signal on QCL-CSI-RS port k on the port with the smallest CSI-RS port index in the kth packet, where k is a natural number.

In a preferred implementation process, the correspondence information may be one of the following:

(1) each CSI-RS port corresponds to each QCL-CSI-RS port;

(2) and grouping the CSI-RS ports corresponding to each port of the QCL-CSI-RS.

Preferably, the QCL-CSI-RS is transmitted on different orthogonal frequency division multiplexing symbols or on different time slots than the CSI-RS.

Preferably, the time interval between transmitting the QCL-CSI-RS and transmitting the CSI-RS is less than a preset threshold.

Preferably, as shown in fig. 6, the apparatus may further include: the first processing module 110 is configured to pre-agree subframe offsets of the CSI-RS and the QCL-CSI-RS with the terminal, and default that K ports with the smallest QCL-CSI-RS and CSI-RS indexes occupy the same resource location, where the subframe offset is not 0 and K is a positive integer.

Preferably, the transmission period of the QCL-CSI-RS is X times the transmission period of the CSI-RS, where X is 2n and n is a natural number.

Preferably, the QCL-CSI-RS and the CSI-RS use the same sequence.

Preferably, as shown in fig. 6, the apparatus may further include: a second configuration module 112, configured to configure the ZP CSI-RS such that the ZP CSI-RS covers REs corresponding to the QCL-CSI-RS, or configure the NZP CSI-RS such that at least one set of the NZP CSI-RS covers REs corresponding to the QCL-CSI-RS.

Preferably, as shown in fig. 6, the apparatus may further include: a receiving module 114, configured to receive frequency offset information fed back by a terminal; and the second processing module 116 is configured to perform phase-lock-anew processing on the crystal oscillator based on the frequency offset information, or perform frequency offset pre-calibration when the CSI-RS and/or the DMRS is transmitted.

Fig. 7 is a block diagram of a quasi-co-location determining apparatus according to an embodiment of the present invention. As shown in fig. 7, the quasi-co-location determination means may include: a receiving module 200, configured to receive CSI-RS information configured by a network side device and QCL-CSI-RS configuration information configured for each set of CSI-RS; the first determining module 202 is configured to determine resource positions of the CSI-RS and the QCL-CSI-RS and reference signal sequence configuration information according to CSI-RS information configured by the network side device and QCL-CSI-RS configuration information corresponding to the CSI-RS; an estimating module 204, configured to jointly estimate the channel large-scale characteristic parameter information by using the CSI-RS reference signals received at the CSI-RS resource locations and the QCL-CSI-RS reference signals received at the QCL-CSI-RS resource locations.

(1) a frequency offset parameter;

(2) a frequency spreading parameter.

Preferably, as shown in fig. 8, the apparatus may further include: a second determining module 206, configured to transmit the reference signal of the default QCL-CSI-RS port on some or all of the ports used by the CSI-RS.

Preferably, the second determining module 206 is configured to perform one of the following operations:

under the condition that the QCL-CSI-RS only supports 1 port by default, a reference signal of a QCL-CSI-RS port 0 is transmitted on a CSI-RS port 0;

when the number of CSI-RS ports is larger than or equal to 2, the QCL-CSI-RS supports 2 ports by default. When the number of the QCL-CSI-RS ports is 1, transmitting a reference signal of a QCL-CSI-RS port 0 on a CSI-RS port 0; when the number of QCL-CSI-RS ports is 2, a reference signal of a QCL-CSI-RS port 0 and a reference signal of a QCL-CSI-RS port 1 are respectively transmitted on a port 0 and a port 1 of a CSI-RS, or the reference signal of the QCL-CSI-RS port 0 and the reference signal of the QCL-CSI-RS port 1 are respectively transmitted on a port 0 and a port 1 of the CSI-RS

When the number of the CSI-RS ports is more than or equal to 2 and the QCL-CSI-RS only supports 2 ports, the reference signal of the QCL-CSI-RS port 0 and the reference signal of the QCL-CSI-RS port 1 are respectively sent on the port 0 and the port 1 of the CSI-RS by default, or the reference signal of the QCL-CSI-RS port 0 and the reference signal of the QCL-CSI-RS port 1 are respectively sent on the port 0 and the port 1 of the CSI-RSAnd (4) sending.

And when the number of the QCL-CSI-RS ports is indicated by network side configuration and/or the network side informs the corresponding relation between each port of the QCL-CSI-RS and each port of the CSI-RS, the terminal determines the CSI-RS port for sending a reference signal sequence of the QCL-CSI-RS port according to the corresponding relation.

Preferably, the receiving module 200 may include: a first obtaining unit (not shown in the figure), configured to receive configuration indication information of the QCL-CSI-RS from the network side device, where the configuration indication information carries port number information of the QCL-CSI-RS, and the port number information is used to implicitly indicate QCL grouping information in the CSI-RS and is determined by a QCL grouping quantity of the CSI-RS; a first determining unit (not shown in the figure) configured to determine the QCL grouping mode of the CSI-RS according to the configuration indication information.

Preferably, the first determining unit is configured to perform one of the following operations:

when the number of the ports of the QCL-CSI-RS is 1, all the ports of the default CSI-RS meet the QCL relationship;

defaulting a port group of all ports of the CSI-RS when the number of ports of the QCL-CSI-RS is 2All satisfy QCL relationship, port group

And c, wherein N is a positive integer.

Preferably, the receiving module 200 may include: a second obtaining unit (not shown in the figure), configured to obtain port number information of the QCL-CSI-RS and correspondence information between each port of the QCL-CSI-RS and each port of the CSI-RS; and a second determining unit (not shown in the figure) configured to determine, according to the port number information and the correspondence information, a QCL grouping condition of the CSI-RS and ports of the CSI-RS corresponding to the reference signals of the ports of the QCL-CSI-RS.

Preferably, the second determining unit is configured to perform one of the following operations:

when the corresponding relation information indicates that the CSI-RS ports carrying the reference signals of the QCL-CSI-RS ports are available, the CSI-RS ports meeting QCL characteristics in the CSI-RS are defaulted to be continuous-index CSI-RS ports, and the determining method of the k-th group of CSI-RS ports meeting the QCL characteristics is as follows: determining a CSI-RS port P corresponding to a QCL-CSI-RS port k_kAnd determining that QCL-CSI-RS port k +1 correspondsCSI-RS port P_k+1And the k-th group of CSI-RS meeting QCL characteristics has P as port_k～P_k+1-1; when the k of the QCL-CSI-RS port is the maximum port index of the QCL-CSI-RS, the k-th group of CSI-RS ports meeting the QCL characteristics is P_kN, wherein N is the port number of the CSI-RS, k is a natural number, and N is a positive integer;

and when the corresponding relation information indicates the port grouping information of each CSI-RS meeting the QCL characteristics, the reference signal on the default QCL-CSI-RS port k is transmitted on the port with the minimum CSI-RS port index in the kth grouping.

Preferably, as shown in fig. 8, the apparatus may further include: a third determining module 208, configured to cover the resource elements RE corresponding to the QCL-CSI-RS for default transmission with zero power ZP CSI-RS.

Preferably, the first determining module 202 is configured to determine the QCL configuration information according to a pre-agreed manner or by a signaling parsing manner, and includes but is not limited to at least one of the following:

(1) resource configuration indication information;

(2) QCL-CSI-RS port number information;

(3) scrambling code identification ID information;

(4) subframe configuration information;

(5) relative subframe configuration information;

(6) mapping band indication information;

the relative subframe configuration information may include at least one of: the subframe offset or the time slot offset of the QCL-CSI-RS relative to the CSI-RS and the period of the QCL-CSI-RS relative to the CSI-RS.

Preferably, as shown in fig. 8, the apparatus may further include: and the feedback module 210 is configured to feed back a frequency offset estimation result to the network side device after jointly estimating a frequency offset according to the QCL-CSI-RS reference signal and the CSI-RS reference signal.

Fig. 9 is a schematic structural diagram of a system for QCL enhancement in cell virtualization according to a preferred embodiment of the present invention. As shown in fig. 9, the system may include, but is not limited to: the terminal and the base station, wherein the base station may include: QCL-CSI-RS generating unit and signaling configuration unit. Optionally, a frequency offset calibration or pre-correction unit may be further included. The specific functions of the interaction between the units are described below:

and the QCL-CSI-RS generation unit is responsible for generating QCL-CSI-RS for each set of CSI-RS, wherein the QCL-CSI-RS is used for jointly estimating channel large-scale characteristic parameters with the CSI-RS, and the channel large-scale characteristic parameters can include but are not limited to: frequency offset parameters and frequency extension parameters.

When transmitting the QCL-CSI-RS, the QCL-CSI-RS is transmitted on the same part or all ports as the CSI-RS.

When transmitting the QCL-CSI-RS, the QCL-CSI-RS is transmitted on the same part or all of the ports as the CSI-RS, and may further include at least one of the following ways:

in the first mode, only 1 port is supported by QCL-CSI-RS by default, and a reference signal of a QCL-CSI-RS port 0 is transmitted on a CSI-RS port 0.

And in the second mode, the QCL-CSI-RS supports 2 ports by default, and when the number of the QCL-CSI-RS ports is 1, a reference signal of the QCL-CSI-RS port 0 is transmitted on the CSI-RS port 0. When the number of the QCL-CSI-RS ports is 2, reference signals of

ports

0 and 1 of the QCL-CSI-RS are respectively transmitted on

ports

0 and 1 of the CSI-RS; or at port 0 of the CSI-RS,and sending, wherein N is the port number of the CSI-RS.

In the third mode, the QCL-CSI-RS only supports 2 ports by default, and reference signals of the

ports

0 and 1 of the QCL-CSI-RS are respectively transmitted on the

ports

0 and 1 of the CSI-RS; or at port 0 of the CSI-RS,

and sending, wherein N is the port number of the CSI-RS.

The base station configures QCL-CSI-RS parameter indication information for the terminal, and the QCL-CSI-RS parameter indication information may include at least one of the following configuration information:

(1) resource configuration indication information;

(2) QCL-CSI-RS port number information;

(3) scrambling code ID information;

(4) subframe configuration information;

(5) relative subframe configuration information.

The QCL-CSI-RS parameter indication information may also carry port number information. The number of the ports implicitly indicates QCL grouping information in the CSI-RS and is determined by the QCL grouping information of the CSI-RS; the grouping information of the QCL in the CSI-RS refers to grouping the ports when all the ports in the CSI-RS cannot meet the QCL characteristics, and enabling the ports meeting the QCL characteristics to be located in the same group.

The QCL-CSI-RS configuration indication information can also comprise corresponding relationship information of each port of the QCL-CSI-RS and the CSI-RS port.

When transmitting the QCL-CSI-RS, it is transmitted on the same part or all of the ports as the CSI-RS, which may further include: the reference signal on QCL-CSI-RS port k is sent on the port with the smallest CSI-RS port index in the kth packet.

The QCL-CSI-RS configuration indication information may further include: the corresponding relation information between each port of the QCL-CSI-RS and the port of the CSI-RS is any one of the following modes:

1) each CSI-RS port corresponds to each QCL-CSI-RS port;

2) grouping CSI-RS ports corresponding to each port of the QCL-CSI-RS;

the QCL-CSI-RS and the CSI-RS are not transmitted on the same OFDM symbol or the same time slot at least, and the time interval between the preferential QCL-CSI-RS and the corresponding CSI-RS is larger than or equal to a first preset threshold value. The time interval between the QCL-CSI-RS and the corresponding CSI-RS is less than or equal to a second preset threshold value.

Subframe offset and/or period of the CSI-RS and the QCL-CSI-RS can be predetermined between the base station and the terminal, the same resource positions occupied by the K ports with the smallest indexes of the QCL-CSI-RS and the CSI-RS are defaulted, wherein the subframe offset is not 0, and the sending period of the QCL-CSI-RS is 1/2/4/8 times of the sending period of the CSI-RS.

The QCL-CSI-RS and the corresponding CSI-RS may use the same sequence.

And when the base station configures the ZP CSI-RS, the ZP CSI-RS covers the RE corresponding to the QCL-CSI-RS. Or when the base station configures the NZP CSI-RS, at least one set of the NZP CSI-RSs covers the QCL-CSI-RS.

And the QCL-CSI-RS is sent on part of bandwidth, and the configuration indication information carries transmission band indication information of the QCL-CSI-RS.

And the signaling configuration unit is responsible for configuring the QCL-CSI-RS parameter information generated for each set of CSI-RS to the terminal.

Optionally, the frequency offset calibration or pre-calibration unit is responsible for performing re-phase locking of the crystal oscillator according to the frequency offset information fed back by the terminal or performing frequency offset pre-calibration when the CSI-RS and/or the DMRS are transmitted.

The terminal may include: the device comprises a signaling receiving and analyzing unit, a parameter estimation unit and a correction and parameter generation unit. Optionally, the method may further include: and a parameter feedback unit.

And the signaling receiving and analyzing unit is responsible for receiving the CSI-RS information configured by the network side equipment and the QCL-CSI-RS configuration information configured for each set of CSI-RS.

The terminal can default to QCL-CSI-RS to transmit on the same part or all ports of CSI-RS according to the convention between the terminal and the network side equipment.

And when no configuration information of the number of the QCL-CSI-RS ports and the CSI-RS port relation exists, the terminal defaults that the number of the QCL-CSI-RS ports does not exceed 2 at most.

When the QCL-CSI-RS supports only 1 port, the terminal defaults to transmit a QCL-CSI-RS reference signal on CSI-RS port 0. When the QCL-CSI-RS supports 2 ports, if the number of the QCL-CSI-RS ports is 1, the terminal defaults that a reference signal of the QCL-CSI-RS port 0 is transmitted on the CSI-RS port 0. If the number of the QCL-CSI-RS ports is 2, the terminal defaults that reference signals of the

ports

0 and 1 of the QCL-CSI-RS are respectively sent on the

ports

0 and 1 of the CSI-RS; or on ports 0, N/2 of the CSI-RS, wherein N is the port number of the CSI-RS.

The terminal acquires the number information of the ports of the QCL-CSI-RS, and the terminal determines the QCL grouping mode of the CSI-RS according to the number information of the ports of the QCL-CSI-RS.

When the number of the QCL-CSI-RS ports is 1, all ports of the CSI-RS are defaulted by the terminal to meet a QCL relationship; when the number of QCL-CSI-RS ports is 2, the terminal defaults to a port group in all ports of the CSI-RS

Satisfy QCL relationships, port groups

The QCL relationship is met, the QCL relationship is not met between the two groups, and meanwhile, a reference signal of a default QCL-CSI-RS port 0 is sent on the CSI-RS port 0; reference signals of QCL-CSI-RS port 1 are arranged at the CSI-RS port

And (4) sending.

Or the terminal receives the number information of the ports of the QCL-CSI-RS and the corresponding relation information of the ports of the QCL-CSI-RS and the ports of the CSI-RS, and the terminal can determine the QCL grouping condition of the CSI-RS and the ports of the CSI-RS corresponding to the reference signals of the ports of the QCL-CSI-RS according to the number information of the ports of the QCL-CSI-RS and the corresponding relation information of the ports of the QCL-CSI-RS and the ports of the CSI-RS. Specifically, the method comprises the following steps:

and when the configuration information of the corresponding relation between each port of the QCL-CSI-RS and the port of the CSI-RS indicates that the CSI-RS port carrying the reference signal of each QCL-CSI-RS port is used, the CSI-RS port meeting the QCL in the CSI-RS is defaulted by the terminal to be the CSI-RS port with continuous index. The method for determining the k-th group of CSI-RS meeting QCL comprises the following steps: determining CSI-RS port P corresponding to QCL-CSI-RS port k_kDetermining the CSI-RS port P corresponding to the QCL-CSI-RS port k +1_k+1And the k-th group of ports satisfying the CSI-RS satisfying the QCL is P_k～P_k+1-1, wherein when port k is the largest port index of QCL-CSI-RS, the k-th set of CSI-RS satisfying QCL is P_kN, wherein N is the port number of the CSI-RS.

And when the configuration information of the corresponding relation between each port of the QCL-CSI-RS and the port of the CSI-RS indicates the port grouping information of each CSI-RS meeting the QCL, the terminal defaults that a reference signal on a QCL-CSI-RS port k is sent on the port with the minimum CSI-RS port index in the kth grouping.

The RE of the QCL-CSI-RS is transmitted by the terminal by default and is covered by the ZP-CSI-RS; or the default QCL-CSI-RS of the terminal is covered by at least one set of the configured NZP CSI-RSs.

The terminal determines at least one of the following parameters of the QCL-CSI-RS according to a pre-promised mode or a signaling analysis mode: sending period, subframe offset, resource configuration and reference signal initialization parameters.

And the parameter estimation unit is responsible for estimating at least one of frequency offset and frequency spread large-scale parameters by using the CSI-RS and the corresponding QCL-CSI-RS jointly according to the received configuration information.

And the correction and parameter generation unit is responsible for carrying out frequency offset correction according to the frequency offset parameters estimated by the parameter estimation unit and/or generating filter coefficients during channel estimation according to the frequency expansion parameters estimated by the parameter estimation unit.

Optionally, the feedback unit is responsible for feeding back the frequency offset parameter to the base station.

It should be noted that, in a specific scenario, the frequency offset correction function in the terminal correction and parameter generation unit and the function of the feedback unit for feeding back the frequency offset parameter to the base station may be selected from one of them.

From the above description, it can be seen that the above embodiments achieve the following technical effects (it is to be noted that these effects are those that certain preferred embodiments can achieve): by adopting the technical scheme provided by the embodiment of the invention, the problem of poor performance caused by serious noise influence when the CSI-RS is used for frequency offset and frequency extension estimation can be solved, and the problem that different CSI-RS ports do not meet QCL (quality control limit) during JT (joint test) transmission among cells in the cell virtualization process can be solved, so that the CSI-RS can be directly used as a cell discovery signal, namely, on one hand, the CSI-RS can support the frequency offset and frequency extension estimation in the cell discovery process by configuring the QCL-CSI-RS; on the other hand, since the QCL-CSI-RS and the CSI-RS are transmitted at the same port, the density of part or all of the port CSI-RS is increased. In addition, the resource configuration of the QCL-CSI-RS can be flexibly selected according to the use condition of the CSI-RS in the network. When the DMRS channel estimation is carried out, DMRS channel estimation parameters (such as time delay parameters and frequency extension parameters) can be generated according to time delay, frequency offset, time delay extension and frequency extension which are obtained by the estimation of different ports of the QCL-CSI-RS.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for configuring quasi-co-location, comprising:

acquiring all currently configured channel state information reference signals (CSI-RS);

configuring corresponding quasi co-location channel state information reference signals QCL-CSI-RS for each set of CSI-RS in all the CSI-RSs respectively, wherein the QCL-CSI-RS is used for jointly estimating large-scale characteristic parameters of a channel with the CSI-RSs;

and configuring all the CSI-RSs and QCL-CSI-RSs corresponding to all sets of CSI-RSs to a terminal.

2. The method of claim 1, wherein the channel large-scale characteristic parameter comprises at least one of:

frequency offset parameters and frequency extension parameters.

3. The method of claim 1, further comprising, after configuring the corresponding QCL-CSI-RS for the CSI-RS:

and transmitting the corresponding QCL-CSI-RS on part or all of the ports used by the CSI-RS.

4. The method of claim 3, wherein sending the corresponding QCL-CSI-RS on some or all ports used by the CSI-RS comprises one of:

the QCL-CSI-RS only supports 1 port by default, and a reference signal of a QCL-CSI-RS port 0 is transmitted on a port 0 of the CSI-RS;

the QCL-CSI-RS defaults to support 2 ports at maximum, and when the number of the QCL-CSI-RS ports is 1, a reference signal of a port 0 of the QCL-CSI-RS is transmitted on a port 0 of the CSI-RS; when the number of the QCL-CSI-RS ports is 2, the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively transmitted on the port 0 and the port 1 of the CSI-RS; or, the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively at the port 0 and the port 1 of the CSI-RS

An uplink transmission, wherein N is the number of ports of the CSI-RS and N is a positive integer,

represents rounding up x;

the QCL-CSI-RS only supports 2 ports by default, and reference signals of a port 0 and a port 1 of the QCL-CSI-RS are respectively transmitted on the port 0 and the port 1 of the CSI-RS; or, the reference signals of the QCL-CSI-RS port 0 and the QCL-CSI-RS port 1 are respectively at the port 0 and the port 1 of the CSI-RS

indicating rounding up x.

5. The method of claim 1, further comprising, after configuring the corresponding QCL-CSI-RS for the CSI-RS:

indicating parameter configuration information of the QCL-CSI-RS to a terminal, wherein the parameter configuration information comprises at least one of the following: resource configuration indication information, QCL-CSI-RS port number information, scrambling code Identification (ID) information, subframe configuration information, relative subframe configuration information and mapping frequency band indication information; the relative subframe configuration information includes at least one of: the QCL-CSI-RS is offset relative to a subframe or a time slot of the CSI-RS, and the periodicity of the QCL-CSI-RS relative to the CSI-RS.

6. The method of claim 1, further comprising, after configuring the corresponding QCL-CSI-RS for the CSI-RS:

and sending configuration indication information of the QCL-CSI-RS to a terminal, wherein the configuration indication information carries port number information of the QCL-CSI-RS, the port number information is used for implicitly indicating QCL grouping information in the CSI-RS and is determined by the QCL grouping quantity of the CSI-RS, the QCL grouping information is used for grouping ports when all the ports in the CSI-RS cannot meet QCL characteristics, and the ports meeting the QCL characteristics are divided into the same group.

7. The method of claim 3 or 6, wherein transmitting the corresponding QCL-CSI-RS on some or all ports used by the CSI-RS comprises:

and transmitting a reference signal on a QCL-CSI-RS port k on a port with the smallest CSI-RS port index in the kth packet, wherein k is a natural number.

8. The method according to claim 6, wherein the configuration indication information further carries correspondence information between each port of the QCL-CSI-RS and each port of the CSI-RS.

9. The method according to claim 8, wherein the correspondence information is one of:

each QCL-CSI-RS port corresponds to a CSI-RS port;

and the CSI-RS port group corresponding to each port of the QCL-CSI-RS is formed.

10. The method of claim 1, wherein the QCL-CSI-RS is transmitted on different orthogonal frequency division multiplexing symbols or on different time slots or on subframes or time slots separated from CSI-RS by more than a first predetermined threshold.

11. The method of claim 1 or 10, wherein a time interval between transmitting the QCL-CSI-RS and transmitting the CSI-RS is less than a second preset threshold.

12. The method of claim 11, wherein subframe offsets of the CSI-RS and the QCL-CSI-RS are pre-agreed with a terminal, and wherein the QCL-CSI-RS and K ports with smallest CSI-RS index occupy the same resource location by default, wherein the subframe offset is not 0 and K is a positive integer.

13. The method of claim 1, wherein the QCL-CSI-RS has a transmission period X times the transmission period of the CSI-RS, and wherein X is 2ⁿAnd n is a natural number.

14. The method of claim 11, wherein the QCL-CSI-RS transmission period is the CSI-RS transmissionX times of period, wherein X is 2ⁿAnd n is a natural number.

15. The method of claim 1, wherein the QCL-CSI-RS and the CSI-RS employ the same sequence.

16. The method of claim 1, further comprising:

the ZP CSI-RS is configured to cover Resource Elements (REs) corresponding to the QCL-CSI-RS by configuring a zero-power ZP CSI-RS, or at least one set of the NZP CSI-RSs is configured to cover REs corresponding to the QCL-CSI-RS by configuring a non-zero-power NZP CSI-RS.

17. The method of claim 6, wherein the QCL-CSI-RS is sent over a portion of available bandwidth and carries transmission band indication information for the QCL-CSI-RS in the configuration indication information.

18. The method of claim 1, further comprising, after configuring the corresponding QCL-CSI-RS for the CSI-RS:

receiving frequency offset information fed back by a terminal;

and performing re-phase-locking processing on the crystal oscillator based on the frequency offset information, or performing frequency offset pre-calibration when the CSI-RS and/or the demodulation reference signal DMRS are transmitted.

19. A method for determining quasi-co-location, comprising:

receiving channel state information reference signal (CSI-RS) information configured by network side equipment and quasi co-location channel state reference signal (QCL-CSI-RS) configuration information configured for each set of CSI-RS;

determining resource positions of the CSI-RS and the QCL-CSI-RS according to the CSI-RS information and the QCL-CSI-RS configuration information;

and jointly estimating large-scale characteristic parameters of the channel by using the CSI-RS reference signals received at the CSI-RS resource positions and the QCL-CSI-RS reference signals received at the QCL-CSI-RS resource positions.

20. The method of claim 19, wherein the channel large-scale characteristic parameter comprises at least one of:

frequency offset parameters and frequency extension parameters.

21. The method of claim 19, further comprising, before performing the joint estimation of the large-scale characteristic parameters of the channel:

and defaulting the reference signals of the QCL-CSI-RS port to be transmitted on part or all ports used by the CSI-RS.

22. The method of claim 21, wherein defaulting the QCL-CSI-RS to transmit on some or all ports used by the CSI-RS comprises one of:

when the number of the ports of the QCL-CSI-RS is 1, a reference signal of a default QCL-CSI-RS port 0 is transmitted on a port 0 of the CSI-RS;

when the number of the ports of the QCL-CSI-RS is 2, the reference signals of the port 0 and the port 1 of the QCL-CSI-RS are respectively transmitted on the port 0 and the port 1 of the CSI-RS; or, the reference signals of the QCL-CSI-RS port 0 and port 1 are respectively at port 0 and port 1 of the CSI-RS

And transmitting, wherein N is the number of ports of the CSI-RS and N is a positive integer.

23. The method of claim 19, wherein receiving the CSI-RS information and the QCL-CSI-RS configuration information comprises:

acquiring port number information of the QCL-CSI-RS from the QCL-CSI-RS configuration indication information, wherein the port number information is used for implicitly indicating QCL grouping information in the CSI-RS and is determined by the QCL grouping quantity of the CSI-RS;

and determining the QCL grouping mode of the CSI-RS according to the configuration indication information.

24. The method of claim 23, wherein determining the QCL grouping for the CSI-RS according to the configuration indication information comprises one of:

when the number of the ports of the QCL-CSI-RS is 1, defaulting that all the ports of the CSI-RS meet a QCL relationship;

defaulting a port group of all ports of the CSI-RS when the number of ports of the QCL-CSI-RS is 2

All satisfy QCL relationship, port group

And c, wherein N is a positive integer.

25. The method of claim 24, wherein the QCL-CSI-RS has a port number less than or equal to 2 by default.

26. The method of claim 19, wherein receiving the CSI-RS information and the QCL-CSI-RS configuration information comprises:

acquiring port number information of the QCL-CSI-RS and corresponding relation information of each port of the QCL-CSI-RS and each port of the CSI-RS from the QCL-CSI-RS configuration indication information;

and determining the QCL grouping condition of the CSI-RS and the ports for sending the corresponding CSI-RS by the reference signals of the ports of the QCL-CSI-RS according to the port number information and the corresponding relation information.

27. The method of claim 26, wherein determining the QCL grouping status of the CSI-RS and the ports for transmitting the reference signals of the respective ports of the QCL-CSI-RS according to the port number information and the correspondence information comprises one of:

when the corresponding relation information indicates that the CSI-RS ports bear reference signals of all QCL-CSI-RS ports, defaulting the CSI-RS ports meeting QCL characteristics in the CSI-RS ports to be CSI-RS ports with continuous indexes, wherein a k-th group of the CSI-RS ports meeting the QCL characteristics is determined by the following method: determining a CSI-RS port P corresponding to a QCL-CSI-RS port k_kAnd determining the CSI-RS port P corresponding to the QCL-CSI-RS port k +1_k+1The k-th set of ports of the CSI-RS satisfying the QCL characteristics is P_k～P_k+1-1; when the QCL-CSI-RS port k is the maximum port index of the QCL-CSI-RS, the k-th group of ports of the CSI-RS meeting the QCL characteristics is P_kN, wherein N is the number of ports of the CSI-RS, k is a natural number, and N is a positive integer;

and when the corresponding relation information indicates the port grouping information of each CSI-RS meeting the QCL characteristics, defaulting that a reference signal on the QCL-CSI-RS port k is transmitted on a port with the smallest CSI-RS port index in the kth grouping.

28. The method of claim 19, further comprising:

resource elements RE corresponding to the QCL-CSI-RS for default transmission are covered by a zero-power ZP CSI-RS.

29. The method of claim 19, wherein determining the QCL-CSI-RS configuration information in a pre-agreed manner or by means of signaling resolution comprises at least one of: resource configuration indication information, QCL-CSI-RS port number information, scrambling code Identification (ID) information, subframe configuration information, relative subframe configuration information and mapping frequency band indication information; the relative subframe configuration information includes at least one of: the QCL-CSI-RS is offset relative to a subframe or a time slot of the CSI-RS, and the periodicity of the QCL-CSI-RS relative to the CSI-RS.

30. The method of claim 19, further comprising, after jointly estimating the large-scale feature parameter information:

after frequency offset is jointly estimated according to the QCL-CSI-RS reference signals and the CSI-RS reference signals, frequency offset estimation results are fed back to the network side equipment.

31. A quasi-co-located deployment device, comprising:

the acquisition module is used for acquiring all currently configured channel state information reference signals (CSI-RS);

the first configuration module is used for configuring corresponding QCL-CSI-RSs for each set of CSI-RS in all the CSI-RSs respectively, and configuring the QCL-CSI-RSs corresponding to all the CSI-RSs and each set of CSI-RSs to a terminal, wherein the QCL-CSI-RSs are used for jointly estimating large-scale characteristic parameters of a channel with the CSI-RSs.

32. The apparatus of claim 31, wherein the channel large-scale characteristic parameter comprises at least one of:

frequency offset parameters and frequency extension parameters.

33. The apparatus of claim 31, further comprising:

a sending module, configured to send the corresponding QCL-CSI-RS on some or all ports used by the CSI-RS.

34. The apparatus of claim 33, wherein the sending module is configured to perform sending operations in one of the following manners:

An uplink transmission, wherein N is the number of ports of the CSI-RS and N is a positive integer,represents rounding up x;

An uplink transmission, wherein N is the number of ports of the CSI-RS and N is a positive integer,indicating rounding up x.

35. The apparatus of claim 31, further comprising:

a first indicating module, configured to indicate parameter configuration information of the QCL-CSI-RS to a terminal, where the parameter configuration information includes at least one of: resource configuration indication information, QCL-CSI-RS port number information, scrambling code Identification (ID) information, subframe configuration information, relative subframe configuration information and mapping frequency band indication information; the relative subframe configuration information includes at least one of: the QCL-CSI-RS is offset relative to a subframe or a time slot of the CSI-RS, and the periodicity of the QCL-CSI-RS relative to the CSI-RS.

36. The apparatus of claim 31, further comprising:

and the second indicating module is used for sending configuration indicating information of the QCL-CSI-RS to a terminal, wherein the configuration indicating information carries port number information of the QCL-CSI-RS, the port number information is used for implicitly indicating QCL grouping information in the CSI-RS and is determined by the QCL grouping quantity of the CSI-RS, and the QCL grouping information is used for grouping ports when all the ports in the CSI-RS cannot meet QCL characteristics, and dividing the ports meeting the QCL characteristics into the same group.

37. The apparatus of claim 33, wherein the transmitting module is further configured to transmit the reference signal on QCL-CSI-RS port k on a port with a smallest CSI-RS port index in the kth packet, where k is a natural number.

38. The apparatus of claim 36, wherein the configuration indication information further carries information about correspondence between each port of the QCL-CSI-RS and each port of the CSI-RS.

39. The apparatus of claim 38, wherein the correspondence information is one of:

each QCL-CSI-RS port corresponds to a CSI-RS port;

40. The apparatus of claim 31, wherein the QCL-CSI-RS is sent on different orthogonal frequency division multiplexing symbols or on different time slots or on subframes or time slots separated from CSI-RS by more than a first predetermined threshold.

41. The apparatus of claim 31 or 40, wherein a time interval between transmitting the QCL-CSI-RS and transmitting the CSI-RS is less than a second preset threshold.

42. The apparatus of claim 31, further comprising:

the first processing module is used for presetting subframe offset of the CSI-RS and the QCL-CSI-RS with a terminal, and defaulting that K ports with the smallest indexes of the QCL-CSI-RS and the CSI-RS occupy the same resource position, wherein the subframe offset is not 0 and K is a positive integer.

43. The apparatus of claim 31, wherein the QCL-CSI-RS has a transmission period X times the transmission period of the CSI-RS, wherein X2ⁿAnd n is a natural number.

44. The apparatus of claim 41, wherein the QCL-CSI-RS has a transmission period that is X times the transmission period of the CSI-RS, and wherein X is 2ⁿAnd n is a natural number.

45. The apparatus of claim 31, wherein the QCL-CSI-RS employs the same sequence as the CSI-RS.

46. The apparatus of claim 31, further comprising:

a second configuration module, configured to configure a zero-power ZP CSI-RS such that the ZP CSI-RS covers Resource Elements (REs) corresponding to the QCL-CSI-RS, or configure a non-zero-power NZP CSI-RS such that at least one set of the NZP CSI-RSs covers REs corresponding to the QCL-CSI-RS.

47. The apparatus of claim 36, wherein the QCL-CSI-RS is sent over a portion of available bandwidth, and wherein transmission band indication information for the QCL-CSI-RS is carried in the configuration indication information.

48. The apparatus of claim 31, further comprising:

the receiving module is used for receiving frequency offset information fed back by the terminal;

and the second processing module is used for performing phase-lock-again processing on the crystal oscillator based on the frequency offset information, or performing frequency offset pre-calibration when the CSI-RS and/or the demodulation reference signal DMRS are transmitted.

49. A quasi-co-location determination apparatus, comprising:

the receiving module is used for receiving channel state information reference signal (CSI-RS) information configured by network side equipment and quasi co-location channel state reference signal (QCL-CSI-RS) configuration information configured for each set of CSI-RS;

a first determining module, configured to determine resource locations of the CSI-RS and the QCL-CSI-RS according to the CSI-RS information and the QCL-CSI-RS configuration information;

and the estimation module is used for jointly estimating the large-scale characteristic parameter information of the channel by using the CSI-RS reference signals received at the CSI-RS resource positions and the QCL-CSI-RS reference signals received at the QCL-CSI-RS resource positions.

50. The apparatus of claim 49, wherein the channel large-scale characteristic parameter comprises at least one of:

frequency offset parameters and frequency extension parameters.

51. The apparatus of claim 49, further comprising:

a second determining module, configured to default that the reference signals of the QCL-CSI-RS port are transmitted on some or all ports used by the CSI-RS.

52. The apparatus of claim 51, wherein the second determining module is configured to perform one of the following operations:

53. The apparatus of claim 49, wherein the receiving module comprises:

a first obtaining unit, configured to obtain port number information of the QCL-CSI-RS from the QCL-CSI-RS configuration indication information, where the port number information is used to implicitly indicate QCL packet information in the CSI-RS and is determined by a QCL packet quantity of the CSI-RS;

a first determining unit, configured to determine a QCL grouping manner of the CSI-RS according to the configuration indication information.

54. The apparatus of claim 53, wherein the first determining unit is configured to perform one of the following operations:

All satisfy QCL relationship, port group

And c, wherein N is a positive integer.

55. The apparatus of claim 54, wherein by default the number of ports of QCL-CSI-RS is less than or equal to 2.

56. The apparatus of claim 49, wherein the receiving module comprises:

a second obtaining unit, configured to obtain port number information of the QCL-CSI-RS and correspondence information between each port of the QCL-CSI-RS and each port of the CSI-RS;

and a second determining unit, configured to determine, according to the port number information and the correspondence information, a QCL grouping condition of the CSI-RS and ports of the CSI-RS corresponding to reference signals of the ports of the QCL-CSI-RS.

57. The apparatus according to claim 56, wherein the second determining unit is configured to perform one of the following operations:

58. The apparatus of claim 49, further comprising:

a fifth determining module, configured to cover Resource Elements (REs) corresponding to the QCL-CSI-RS for default transmission with a zero-power zpccsi-RS.

59. The apparatus of claim 49, wherein said first determining module for determining said QCL-CSI-RS configuration information in a pre-agreed manner or by signaling resolution comprises at least one of: resource configuration indication information, QCL-CSI-RS port number information, scrambling code Identification (ID) information, subframe configuration information, relative subframe configuration information and mapping frequency band indication information; the relative subframe configuration information includes at least one of: the QCL-CSI-RS is offset relative to a subframe or a time slot of the CSI-RS, and the periodicity of the QCL-CSI-RS relative to the CSI-RS.

60. The apparatus of claim 49, further comprising:

and the feedback module is used for feeding back a frequency offset estimation result to the network side equipment after jointly estimating the frequency offset according to the QCL-CSI-RS reference signal and the CSI-RS reference signal.