CN103945447B - A method and user equipment for measuring downlink channel characteristic parameters - Google Patents

Abstract

The present application proposes a method for measuring downlink channel characteristic parameters using virtual co-located multiple reference signal resources. The combination of multiple reference signal resources and their corresponding configuration information; the user equipment measures downlink channel characteristic parameters on the multiple reference signal resources satisfying the virtual co-location relationship, and reports the corresponding downlink channel characteristic parameters according to the measurement configuration. The present application also proposes a user equipment. In the present application, by reasonably configuring multiple reference signal resources to satisfy the virtual co-location relationship, the UE can effectively improve the measurement accuracy of the downlink channel characteristic parameters by the UE on the premise of maintaining reasonable complexity and power consumption.

Description

A method and user equipment for measuring downlink channel characteristic parameters

technical field

The present application relates to the field of wireless communication technologies, and in particular, the present application relates to a method and user equipment for measuring downlink channel characteristic parameters.

Background technique

For the LTE Rel8/9/10 system, the cell common reference signal, CSI-RS, user-specific reference signal resource and downlink data channel are all sent from the same transmission point, that is, these signals are co-located. Due to co-location, these signals have the same channel characteristics. User equipment (UE) usually estimates channel characteristics based on the cell common reference signal (CRS), such as Doppler spread, delay spread, frequency synchronization and time synchronization. In addition, the CRS is also used to support the measurement of the measurement quantity of the radio resource management, for example, to support the measurement of the received power of the reference signal, the received quality of the reference symbol, and the like.

Cooperative Multipoint Operation (CoMP) is an important feature of the LTE system, and CoMP can effectively improve the peak rate of the system and the throughput of users at the cell edge.

In CoMP, since transmission points (TPs) for transmitting downlink data are dynamically changed, different reference signal resources, downlink control channels and downlink data channels may come from different transmission points. In this case, the downlink reference signal and the downlink data channel are no longer co-located, so that the original measurement of channel characteristics based on the cell common reference signal no longer works.

For the transmission of the Physical Downlink Shared Channel (PDSCH), in the current standardization, multiple virtual co-location (QCL) parameter sets are defined through system signaling, and different sets correspond to different virtual co-location assumptions. Each virtual co-location set includes a channel state indication reference signal (CSI-RS) resource, which is used for the measurement of channel characteristic parameters. At the same time, the system indicates the virtual co-location set corresponding to the current downlink data channel through downlink control signaling. The UE measures channel characteristic parameters (including: delay spread, average gain, frequency offset, Doppler spread, average delay, etc.) based on a single CSI-RS resource in each virtual co-location set.

Using reference signal resources to measure channel characteristics, the measurement accuracy largely depends on the number of resource elements available in a resource block and the distribution of reference signal resource samples in the time-frequency domain. As shown in Figure 1, a CRS has 8 resource samples in a time-frequency resource block, while a CSI-RS has only 2 resource elements in a time-frequency resource block (in the case of 2 antenna ports), which The number of sample points is small, resulting in poor accuracy of the measured channel characteristic parameters. For some channel characteristic parameters, the range that can be estimated and measured is very small, which cannot meet the needs of the system.

In the current standardization, it is proposed to use the user-dedicated reference signal (DMRS) of PDSCH to assist in estimating channel characteristic parameters, but the number of samples of the user-dedicated reference signal is limited by the number of resource blocks occupied by the currently deployed user-dedicated reference signal. When the number of downlink user resources is small, the estimation accuracy is poor, and the channel characteristics cannot be effectively tracked. At the same time, since the user-specific reference signal is sent together with the downlink data, and it comes from different transmission points in different subframes, the user equipment cannot predict the channel characteristic parameters in advance, and needs to be estimated in each downlink data subframe, which increases the realization of complexity.

Therefore, it is necessary to propose an effective technical solution to solve the technical problems of insufficient accuracy for channel characteristic measurement based on a single channel reference resource in the virtual co-location set, and for some channel characteristic parameters, the range that can be estimated is very small , technical problems that cannot meet the needs of the system.

SUMMARY OF THE INVENTION

The purpose of this application is to solve at least one of the above technical problems, so that the UE can accurately measure various downlink channel characteristic parameters while maintaining low power consumption and complexity.

On the one hand, an embodiment of the present application proposes a method for measuring downlink channel characteristic parameters, including the following steps:

The user equipment receives the signaling, and obtains, from the signaling, a combination of multiple reference signal resources that satisfy the virtual co-location relationship and configuration information thereof;

The user equipment measures downlink channel characteristic parameters on the multiple reference signal resources that satisfy the virtual co-location relationship;

The user equipment reports the downlink channel characteristic parameters obtained by measurement according to the measurement configuration.

On the other hand, the embodiment of the present application also proposes a user equipment, including a receiving module, a measuring module, and a sending module, wherein:

The receiving module is configured to receive the signaling sent by the base station, and obtain from the signaling a combination of multiple reference signal resources that satisfy the virtual co-location relationship and configuration information thereof;

the measurement module, configured to measure downlink channel characteristic parameters on the multiple reference signal resources satisfying the virtual co-location relationship;

The sending module is configured to report the measured downlink channel characteristic parameters to the base station according to the measurement configuration.

The above solution proposed in the present application provides a way to reasonably select and configure multiple reference signal resources in each virtual co-location set, so that the UE can perform estimation and calculation of various channel characteristic parameters based on the virtual co-located multiple reference signal resources. measurement plan. The multiple reference signal resources in the virtual co-location set may be configured multiple CSI-RS resources, may be the demodulation reference signal resources (DMRS) corresponding to multiple enhanced control channel sets (ePDCCH), or may be single or multiple CSI-RS resources - Combination of RS resources and demodulation reference signal resources (DMRS) for single or multiple ePDCCH sets. By configuring multiple reference signal resources in each virtual co-location set, the scheme increases the granularity of the reference signal resource elements used to measure the channel characteristic parameters in the time-frequency domain. The accuracy of measuring the channel characteristic parameters by the UE is improved, and the estimation range of the channel characteristic parameters that can be estimated by the UE is also improved. In addition, the above solution proposed in the present application has little modification to the existing system, does not affect the compatibility of the system, and is simple and efficient to implement.

Description of drawings

FIG. 1 is a schematic diagram of resources of a cell common reference signal (port0) and a single CSI-RS (port15) under the existing single-antenna port;

FIG. 2 is a schematic diagram of the mapping pattern of CSI-RS resources under the existing 2 antenna ports (port15/port16);

3 is a flowchart of a method for measuring channel characteristic parameters based on virtual co-located multiple reference signal resources according to an embodiment of the present application;

4 is a schematic diagram of combining multiple reference signal resource virtual co-locations by selecting different CSI-RS resource configurations in the present application;

5 is a schematic diagram of combining multiple CSI-RS resource virtual co-locations by selecting different CSI-RS subframe configurations in the present application;

6 is a schematic diagram of combining and configuring virtual co-location of multiple reference signal resources by selecting a single CSI-RS resource and a demodulation reference channel resource of an ePDCCH set;

7 is a schematic diagram of combining and configuring virtual co-location of multiple reference signal resources by selecting a plurality of CSI-RS resources and demodulation reference signal resources of an ePDCCH set;

FIG. 8 is a schematic structural diagram of a user equipment UE according to an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and examples.

The present application proposes a method for configuring multiple reference signal resources in a virtual co-location set, thereby improving the measurement accuracy of downlink channel characteristic parameters.

In this application, the combination of "multiple" reference signal resources includes two meanings: on the one hand, it can be a combination of multiple reference signal resources of the same type; on the other hand, it can be one or more of a variety of different types. The reference signal resources are combined.

Specifically, the main idea of this application is: first, the base station configures multiple reference signal resources to be delivered in the same TP, so that these reference signal resources satisfy the virtual co-location relationship, forming a virtual co-location set, and then the base station assigns the same The combination of multiple reference signal resources in the virtual co-location set and its configuration information are sent to the UE through high-layer signaling, so that the UE can know the combination of multiple reference signal resources that satisfy the virtual co-location relationship and its configuration information, and is described in the Measuring downlink channel characteristic parameters on multiple reference signal resources increases the measurement accuracy and increases the range of downlink channel characteristic parameters that can be estimated by the UE due to the increase in the number of samples.

The configured multiple reference signal resources that satisfy the virtual co-location relationship can be multiple CSI-RS resources, multiple demodulation reference signal (DMRS) resources of multiple ePDCCH sets, or multiple or single CSI-RS resources and multiple or single CSI-RS resources. The combination of DMRS resources of the ePDCCH set. FIG. 2 shows a schematic diagram of the existing CSI-RS resource mapping pattern in a subframe under 2 ports. It can be seen from the figures in the figure that there are 20 different CSI-RS resource configurations, and each CSI-RS resource has only 2 resource elements in one resource block.

In order to achieve the purpose of the present application, an embodiment of the present application proposes a method for measuring downlink channel characteristic parameters using virtual co-located multiple reference signal resources, including the following steps: a user equipment receives multiple reference signals configured to satisfy the virtual co-location relationship Resource signaling; the user equipment obtains, according to the signaling, the combination of virtual co-located reference signal resources corresponding to the measurement downlink channel characteristic parameter and its corresponding configuration information; the user equipment adopts the multiple reference signals that satisfy the virtual co-location relationship Signal resources are used to measure downlink channel characteristic parameters; the user equipment receives downlink control information and downlink data sent by the base station according to the measured downlink channel characteristic parameters, and reports the measured downlink channel characteristic parameters according to the configuration of the base station.

As shown in FIG. 3 , it is a flowchart of a method for measuring downlink channel characteristic parameters using virtual co-located multiple reference signal resources according to an embodiment of the present application, including the following steps:

S110: The user equipment receives a signaling, the signaling indicates a combination of multiple reference signal resources corresponding to the measurement channel characteristic parameter that satisfies the virtual co-location relationship and its corresponding configuration information. Hereinafter, "multiple reference signal resource combinations satisfying the virtual co-location relationship" may also be referred to as "multiple reference signal resources in a virtual co-location set".

In this step, the base station may send the signaling to the user equipment through a radio resource configuration message or control information.

In this step, the combination mode of the multiple reference signal resource combination that satisfies the virtual co-location relationship can be adopted in any one or more of the following modes at the same time:

Combination mode 1 is to use frequency domain combination to configure multiple channel reference resources to satisfy the virtual co-location (QCL) relationship, that is, to select multiple CSI-RS resources for combination through CSI-RS resource configuration (CSI-RS configuration). For example, in the example shown in FIG. 4 , the CSI-RS resources whose reference signal resource configurations are 0 and 2 are selected to be combined.

Combination mode 2: In the time domain combination mode, multiple CSI-RS resources are configured to satisfy the QCL relationship, that is, reference signal resources of different subframes are selected for combination through CSI-RS subframe configuration (CSI-RS subframe configuration). For example, in the example shown in FIG. 5 , the reference signal subframes in different subframes are configured to be 15, 16, and 17 reference signal resources to be combined.

Combination mode 3: The configuration of the CSI-RS resources and the DMRS resources of the ePDCCH set satisfies the QCL relationship. Compared with the method of enhancing the QCL measurement accuracy by dynamically scheduling the DMRS of the PDSCH, in this combination mode, the configuration of the ePDCCH set (eg, the index of the occupied PRB pair) is semi-statically configured through high-layer signaling. The UE may know that there must be a DMRS channel that can be used to enhance the measurement accuracy of the QCL channel characteristics at some time-frequency positions of the radio frame, thereby ensuring the robustness of the QCL measurement. Here, the ePDCCH set used to enhance the measurement accuracy of the QCL channel characteristics is generally a distributed ePDCCH set. The DMRS of the distributed ePDCCH set is shared by multiple UEs, and its transmit power is usually constant on each PRB pair, and should be set according to the UE with the worst channel quality, which is beneficial to improve the QCL measurement accuracy.

The distributed ePDCCH set introduced here can only be used to enhance the accuracy of QCL channel characteristic measurement by using its DMRS, and it is not required that the UE must use this ePDCCH set to detect the ePDCCH scheduled for uplink and downlink transmission at the same time. The existing standard supports up to 4 kinds of QCL assumptions for PDSCH, but the UE only detects two ePDCCH sets at most. Therefore, according to the combination mode 3 of this application, there must be such a distributed ePDCCH set, which can be used to enhance the UE's understanding of the QCL channel. The accuracy of the characteristic measurement, but the UE is not configured to detect ePDCCH on this distributed ePDCCH set. In fact, the four distributed ePDCCH sets configured to enhance the accuracy of QCL channel characteristic measurement may be completely different from the ePDCCH sets used by the UE to detect the ePDCCH. That is, in fact, there are at most 6 ePDCCH sets for a UE. In 4 of the distributed ePDCCH sets, the UE only needs to measure its DMRS to obtain the QCL channel characteristics, and the other two ePDCCH sets need to detect both DMRS and alternative ePDCCH channels. . For a QCL parameter set, the distributed ePDCCH set that enhances the measurement accuracy of the QCL channel characteristics may also be an ePDCCH set configured by the UE to detect the ePDCCH. In this way, the number of ePDCCH sets actually detected by the UE is correspondingly reduced.

Two examples are given below to illustrate the combination mode 3.

As shown in Figure 6, let one CSI-RS resource (resource configuration is 0) and the DMRS resource corresponding to the distributed ePDCCH set satisfy the QCL relationship, and further suppose that the distributed ePDCCH set contains 4 PRB pairs, then the essence is to use the distributed ePDCCH set DMRS ports 107 and 109 on the 4 PRB pairs of the ePDCCH set to enhance the accuracy of QCL channel characteristics measured using CSI-RS resources (resource configuration is 0).

As shown in Figure 7, let 2 CSI-RS resources (resource configuration 0 and 2) and the DMRS resources of the distributed ePDCCH set satisfy the QCL relationship, and further assume that the distributed ePDCCH set contains 4 PRB pairs, then the essence is to use DMRS ports 107 and 109 on the 4 PRB pairs of the distributed ePDCCH set to enhance the accuracy of QCL channel characteristics measured with CSI-RS resources (resource configuration 0 and 2).

In step S110 of the present application, when selecting multiple CSI-RS resource combinations that satisfy the virtual co-location relationship, the selection method can be any of the following:

The first selection method is to arbitrarily select and combine CSI-RS resources from optional CSI-RS resources.

The second selection method is to select CSI-RS resources with strong correlation characteristics and in different time domain symbols for combination according to the requirements for measuring channel characteristic parameters and the correlation characteristics of the channel in the time-frequency domain.

As shown in FIG. 4 , if the time-frequency domain correlation is considered, resources in different time domains and adjacent in frequency are selected for combination in the same subframe, for example, CSI-RS resources with reference signal resource configurations of 0 and 2 are combined.

As shown in Figure 5, if the correlation in the time-frequency domain is considered, by selecting the CSI-RS subframe configuration between different subframes, select CSI-RS resources with the same period and adjacent in the time domain, such as selecting reference signal subframes The reference signal resources configured as 15, 16, and 17 are combined, so that the reference signal resources in the combination are in adjacent subframes 0, 1, and 2.

In step S110 of this application, the user equipment may assume that the obtained multiple reference signal resources in the virtual co-location set are consistent with one or more of the following channel characteristic parameters:

delay extension;

average gain;

frequency offset;

Doppler spread;

average delay.

The signaling in step S110 of this application should include one or more of the following information:

1) The number of CSI-RSs in the combination, that is, the size of the combination of multiple CSI-RS resources.

2) Resource configuration of CSI-RS within the combination. The signaling can give a specific configuration combination. For example, in the signaling, {0,2} is used to represent the combination of CSI-RS resources with selected resource configurations of 0 and 2; from the perspective of saving signaling overhead, all feasible Resource configurations are grouped, numbered, and the corresponding numbered numbers are indicated. For the case of 1 antenna port or 2 antenna ports (referred to as 1/2 antenna port for short), when the combination size is 2, considering traversing all combinations will have a combination that can Each combination is numbered, or a subset of them is selected for numbering according to channel correlation and measurement requirements. Table 1 is used for illustration below.

Table 1 lists a list of subsets of partial resource combinations with a combination size of 2 at 1/2 antenna port.

Table 1

According to Table 1, assuming that the user equipment receives a combination number of 0, it can know that the resource configuration combination in the current combination is {0,1}.

3) Subframe configuration of channel reference resources within the combination. The signaling can give a specific configuration combination, such as {15, 16, 17} representing the selection of subframes configured as {15, 16, 17} resources for combination, or give the combination size and the starting subframe of the resources in the combination Configuration, for example: the combination size is 3, the starting subframe configuration is 15, and the subframe configuration set is {15, 16, 17}.

4) Indication information of the virtual co-located ePDCCH set, including the index of the PRB pair included in the ePDCCH set, the initialization value of the DMRS sequence, and the like.

S120: The user equipment obtains, according to the received signaling, a combination of reference signal resources corresponding to the measured downlink channel characteristic parameter that satisfies the virtual co-location relationship and its corresponding configuration information.

In this step, the manner in which the user equipment obtains the combination and its corresponding configuration information depends on the manner in which the signaling carries the corresponding information in step S110. Specifically, the combination of multiple reference signal resources and their corresponding configuration information can be obtained in the following ways.

Obtaining method 1: a table is defined in a specification, the signaling gives the combination size and the pre-defined resource combination number, and the user equipment searches the pre-defined table according to the signaling to obtain the specific configuration information of the multiple reference signal resources in the combination. For example, according to Table 1, when the user equipment receives a combination number of 2 and a combination size of 2, it can know that the resource configuration combination in the current combination is {0,2}.

Obtaining method 2: The specific combination is given by signaling, and the user equipment obtains the configuration of multiple reference signal resources in the combination after receiving the signaling.

S130: The user equipment measures downlink channel characteristic parameters according to multiple reference signal resources using virtual co-location.

In this step, the user equipment may measure the downlink channel characteristic parameter by using multiple reference signal resources that satisfy the virtual co-location relationship. The channel characteristic parameters that can be measured include one or more of the following:

delay extension;

average gain;

frequency offset;

Doppler spread;

average delay;

channel quality information;

reference signal received power;

Reference signal reception quality.

S140: Receive downlink control information and downlink data sent by the base station according to the measured downlink channel characteristic parameters, and report the measured downlink channel characteristic parameters according to the configuration of the base station.

Corresponding to the above method, an embodiment of the present application further proposes a user equipment as shown in FIG. 8 , the user equipment includes a receiving module 110, a measuring module 120, and a sending module 130, wherein:

A receiving module 110, configured to receive a signaling sent by a base station, and obtain a combination of multiple reference signal resources that satisfy the virtual co-location relationship and corresponding configuration information from the signaling;

a measurement module 120, configured to measure downlink channel characteristic parameters on the multiple reference signal resources satisfying the virtual co-location relationship;

The sending module 130 is configured to report the measured downlink channel characteristic parameter to the base station according to the measurement configuration.

Preferably, the multiple reference signal resources satisfying the virtual co-location relationship refer to: the multiple reference signal resources are consistent with one or more of the following channel characteristic parameters: delay spread, average gain, frequency offset , Doppler spread, average delay;

The measurement module is used to measure one or more of the following downlink channel characteristic parameters: delay spread, average gain, frequency offset, Doppler spread, average delay, channel quality information, reference signal received power, Reference signal reception quality.

Wherein, the combination of multiple reference signal resource combinations that satisfy the virtual co-location relationship obtained by the receiving module can be combined according to the aforementioned three combination methods, and when selecting multiple CSI-RS resources for combination, it can be combined according to The selection is performed in the two selection manners as described above, which will not be repeated here.

The above-mentioned method or device proposed in the present application provides a way of reasonably selecting and configuring multiple reference signal resources in each virtual co-location set, so that the UE can perform multiple channel characteristic parameters based on the virtual co-located multiple reference signal resources. Estimation and measurement scenarios. At the same time, by configuring multiple reference signal resources, the range of channel characteristic parameters that can be handled by the user equipment is increased, and sufficient measurement accuracy can be ensured even when the measurement bandwidth is small, so as to prevent the UE from measuring in an excessively large measurement bandwidth and performing downlink channels for a long time. The measurement of characteristic parameters effectively guarantees the complexity of the system and the power consumption of the user equipment. In addition, the above solution proposed in the present application has little modification to the existing system, does not affect the compatibility of the system, and is simple and efficient to implement.

In order to facilitate the understanding of the present application, the following further description is given with reference to the accompanying drawings and specific application scenarios.

Application scenario 1: The multiple reference signal resources configured by the virtual co-location set are: multiple CSI-RS resources, and multiple CSI-RS resources are configured under the same subframe configuration.

As shown in Figure 2 and Figure 4, this application scenario describes that the combination of multiple reference signal resources configured by the base station that satisfies the virtual co-location relationship is realized by selecting different CSI-RS resources in the same subframe.

Step 1: The base station informs the UE of the configuration of the multiple reference signal resource combination in the currently configured virtual co-location set through system information. The specific signaling content is as follows:

Number of CSI-RS resources in the combination: 2;

CSI-RS resource configuration in a combination: specific configurations 0 and 2 can be given, or a list number of the combination, such as number 2 in Table 1, can be given.

Step 2: The UE receives the configuration information about the multiple channel reference channel resource combination, and learns that the current multiple CSI-RS resource configuration is {0, 2} according to the system information.

Step 3: The UE operates the resource elements on the corresponding resource positions according to the obtained resource configuration of the multiple reference signals, and measures the downlink channel characteristic parameters, including: delay spread, average gain, frequency offset, Doppler spread , average delay, channel quality information, CSI-RS received power, CSI-RS received quality.

Step 4: The UE reports the measurement results of downlink channel characteristic parameters within the measurement time, including: channel quality information, CSI-RS received power, and CSI-RS received quality.

Application scenario 2: The configured multiple reference signal resources satisfying the virtual co-location relationship are combined into a single CSI-RS resource and the demodulation reference signal resources of the ePDCCH set, as shown in FIG. 7 .

This application scenario describes that the base station configures multiple types of reference signal resources for combined virtual co-location, and combines a single CSI-RS resource with an ePDCCH set.

Step 1: The information of the multiple reference signal resource combination in the virtual co-location set currently configured by the base station is notified to the UE through the system information. The specific signaling content is as follows:

CSI-RS configuration information in the virtual co-location set:

Resource configuration of CSI-RS combination: 0;

The indication information of the virtual co-located ePDCCH set includes the index of the PRB pair included in the ePDCCH set, the initialization value of the DMRS sequence, and the like.

Step 2: The UE receives the configuration information about the virtual co-located multiple reference channel resource combination, learns that the current virtual co-located CSI-RS resource configuration is 0 according to the system information, and obtains the current virtual co-located ePDCCH set according to the indication of the virtual co-located ePDCCH set. Configuration information of the demodulation reference signal resources of the virtual co-located ePDCCH set.

Step 3: The UE operates the resource elements on the corresponding resource positions according to the obtained resource configuration of the multiple reference signals, and measures the downlink channel characteristic parameters, including: delay spread, average gain, frequency offset, Doppler spread , average delay, channel quality information, CSI-RS received power, CSI-RS received quality.

Step 4: The UE reports the measurement result of the downlink channel characteristic parameter according to the measurement configuration within the measurement time.

Application scenario 3: Multiple reference signal resources satisfying the virtual co-location set are combined into multiple reference signal resources in different subframes, as shown in FIG. 6 . This application scenario describes that the base station chooses to combine multiple reference signal resources in adjacent subframes. The corresponding signaling combination is: indicating that the size of the combination is a resource subframe configuration set corresponding to the combination, so as to inform the user of the configuration information of the current multiple reference signal resource combination.

Step 1: The information of the virtual co-located multiple reference signal resource combination currently configured by the base station is notified to the UE through the system information. The specific signaling content is as follows:

Number of antenna ports: 2;

Number of CSI-RS resources in the combination: 3;

Combined CSI-RS resource configuration: 0;

Combined CSI-RS resource subframe configuration set: {15, 16, 17}.

Step 2: The UE receives the configuration information about the resource combination of multiple reference signals in the virtual co-location set, and according to the system information, learns that the current resource configuration of multiple CSI-RS is 0, and the corresponding subframe is {0,1,2}, The transmission period is 20ms.

Step 3: The UE operates the resource elements on the corresponding resource positions according to the obtained resource configuration of the multiple reference signals, and measures the downlink channel characteristic parameters, including: delay spread, average gain, frequency offset, Doppler spread , average delay, channel quality information, CSI-RS received power, CSI-RS received quality.

Step 4: The UE reports the measurement result of the channel characteristic parameter within the measurement time.

Those skilled in the art can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, and the program can be stored in a computer-readable storage medium. When executed, one or a combination of the steps of the method embodiment is included.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing module, or each unit may exist physically alone, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, and the like.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the present application. within the scope of protection.

Claims (16)

1. a kind of method for carrying out downlink channel characteristics parameter measurement, which comprises the following steps:

User equipment receives signaling, obtained from the signaling combination for meeting the Multiple reference signal resource of empty co-located relationship and Its configuration information；The Multiple reference signal resource for meeting empty co-located relationship refers to: the Multiple reference signal resource is to such as Under one or more kinds of characteristic of channel parameters be consistent: it is delay spread, average gain, frequency shift (FS), doppler spread, flat Equal time delay；

User equipment carries out the measurement of downlink channel characteristics parameter in the Multiple reference signal resource for meeting empty co-located relationship；

User equipment is according to measuring configuration, downlink channel characteristics parameter that reporting measurement obtains.

2. the method as described in claim 1, it is characterised in that:

It is described to be measured as measuring one or more of following downlink channel characteristics parameter: delay spread, average gain, frequency Offset, doppler spread, average delay, channel quality information, Reference Signal Received Power, Reference Signal Received Quality.

3. the method as described in claim 1, it is characterised in that:

The combination of the Multiple reference signal resource include: same type of multiple reference signal resources are combined, or Person is combined different types of one or more reference signal resources；

The type of the reference signal resource includes: channel status instruction reference signal CSI-RS resource, enhancing physical down control The corresponding demodulated reference signal DMRS resource of channel ePDCCH collection processed.

4. method as claimed in claim 3, which is characterized in that the combination of Multiple reference signal resource combination includes Following one or more mode uses simultaneously:

By selecting different CRI-RS resource distributions, multiple CRI-RS resources in the same subframe are combined；

By selecting the sub-frame configuration of different CRI-RS resources, the CRI-RS resource of different subframes is combined；

Single or multiple CRI-RS resources and the DMRS resource of single or multiple ePDCCH collection are combined.

5. method as claimed in claim 4, which is characterized in that when being combined to CSI-RS resource, it then follows following principle:

It is randomly choosed in currently available CSI-RS resource；

It is related to time-frequency domain channel special according to downlink channel characteristics parameter to be measured in currently available CSI-RS resource Property, it selects channel correlation properties by force and the reference signal resource on different time domain symbol is combined.

6. method as claimed in claim 5, which is characterized in that the mode packet of the strong CSI-RS resource of selection channel correlation properties It includes:

The CSI-RS resource that on different time domain symbol and frequency domain is adjacent is selected to be combined in the same subframe；

The CSI-RS resource for selecting sub-frame configuration adjacent in different subframes is combined.

7. method as claimed in claim 3, it is characterised in that:

The ePDCCH collection is distributed ePDCCH collection；

The ePDCCH collection is an ePDCCH collection for configuring UE detection ePDCCH；Alternatively, the ePDCCH collection is not configuration UE Detect an ePDCCH collection of ePDCCH.

8. method as claimed in claim 3, which is characterized in that include one or more of information in the signaling:

The size of multiple CSI-RS resource combination；

The corresponding number of multiple CSI-RS resource combination；

Multiple CSI-RS resource combines corresponding CSI-RS resource configuration set；

Multiple CSI-RS resource combines corresponding CSI-RS sub-frame configuration set；

The instruction information of empty co-located ePDCCH collection.

9. a kind of user equipment characterized by comprising receiving module, measurement module and sending module, in which:

The receiving module obtains from the signaling for receiving the signaling of base station transmission and meets the multiple of empty co-located relationship The combination of reference signal resource and its configuration information；The Multiple reference signal resource for meeting empty co-located relationship refers to: described Multiple reference signal resource is consistent following one or more kinds of characteristic of channel parameters: delay spread, average gain, frequency Rate offset, doppler spread, average delay；

The measurement module, for carrying out downlink channel characteristics ginseng in the Multiple reference signal resource for meeting empty co-located relationship Several measurements；

The sending module, the downlink channel characteristics reporting parameters for being obtained measurement according to measuring configuration are to base station.

10. user equipment as claimed in claim 9, it is characterised in that:

The measurement module, for measuring one or more of following downlink channel characteristics parameter: delay spread, average increasing Benefit, frequency shift (FS), doppler spread, average delay, channel quality information, Reference Signal Received Power, reference signal receive matter Amount.

11. user equipment as claimed in claim 9, it is characterised in that:

The combination of the Multiple reference signal resource include: same type of multiple reference signal resources are combined, or Person is combined different types of one or more reference signal resources；

The type of the reference signal resource includes: channel status instruction reference signal CSI-RS resource, enhancing physical down control The corresponding demodulated reference signal DMRS resource of channel ePDCCH collection processed.

12. user equipment as claimed in claim 11, which is characterized in that the combination side of the Multiple reference signal resource combination Formula includes following one or more kinds of modes while using:

By selecting different CRI-RS resource distributions, multiple CRI-RS resources in the same subframe are combined；

By selecting the sub-frame configuration of different CRI-RS resources, the CRI-RS resource of different subframes is combined；

Single or multiple CRI-RS resources and the DMRS resource of single or multiple ePDCCH collection are combined.

13. user equipment as claimed in claim 12, which is characterized in that when being combined to CSI-RS resource, it then follows with Lower principle:

It is randomly choosed in currently available CSI-RS resource；

It is related to time-frequency domain channel special according to downlink channel characteristics parameter to be measured in currently available CSI-RS resource Property, it selects channel correlation properties by force and the reference signal resource on different time domain symbol is combined.

14. user equipment as claimed in claim 13, which is characterized in that the strong CSI-RS resource of selection channel correlation properties Mode includes:

The CSI-RS resource that on different time domain symbol and frequency domain is adjacent is selected to be combined in the same subframe；

The CSI-RS resource for selecting sub-frame configuration adjacent in different subframes is combined.

15. user equipment as claimed in claim 11, it is characterised in that:

The ePDCCH collection is distributed ePDCCH collection；

The ePDCCH collection is an ePDCCH collection for configuring UE detection ePDCCH；Alternatively, the ePDCCH collection is not configuration UE Detect an ePDCCH collection of ePDCCH.

16. user equipment as claimed in claim 11, which is characterized in that include that one or more of is believed in the signaling Breath:

The size of multiple CSI-RS resource combination；

The corresponding number of multiple CSI-RS resource combination；

Multiple CSI-RS resource combines corresponding CSI-RS resource configuration set；

Multiple CSI-RS resource combines corresponding CSI-RS sub-frame configuration set；

The instruction information of empty co-located ePDCCH collection.