Method and apparatus for configuring channel state information- reference signal

Abstract

Disclosed are a method and an apparatus for configuring a channel state information-reference signal (CSI-RS). The method comprises: a base station determines configuration information of a CSI-RS; the base station generates signaling comprising the configuration information of the CSI-RS; and the base station transmits the signaling comprising the configuration information of the CSI-RS. The configuration information comprises: a port quantity, pilot resource pattern information, and a multiplex mode between CSI-RS ports, when the port quantity is greater than 1, the CSI-RS has M candidate pilot resource patterns, where M is an integer greater than 1. The method and apparatus for configuring a CSI-RS disclosed in embodiments of the present invention can support transmission of a CSI-RS of which the port quantity is greater than 8.

Claims

1. A method for configuring a Channel State Information-Reference Signal (CSI-RS), comprising: determining, by a base station, configuration information of the CSI-RS; generating, by the base station, signaling comprising the configuration information of the CSI-RS; and transmitting, by the base station, the signaling comprising the configuration information of the CSI-RS, wherein the configuration information comprises: a number of CSI-RS ports, RS resource pattern information and an inter-CSI-RS-port multiplexing scheme, and the RS resource pattern information and the inter-CSI-RS-port multiplexing scheme are jointly-coded in the signaling comprising the configuration information of the CSI-RS; wherein when the number of the CSI-RS ports is larger than 1, the CSI-RS has M candidate RS resource patterns, where M is an integer greater than 1; wherein the M candidate RS resource patterns are divided into a first pattern set and a second pattern set, each of the first pattern set and the second pattern set comprises one or more candidate RS resource patterns, a first multiplexing scheme is used for CSI-RS ports in each candidate RS resource pattern of the first pattern set, a second multiplexing scheme is used for CSI-RS ports in each candidate RS resource pattern of the second pattern set, and the first multiplexing scheme is different from the second multiplexing scheme; and wherein the first multiplexing scheme is a first code division multiplexing with an orthogonal code length of 2, the second multiplexing scheme is a second code division multiplexing with an orthogonal code length of 4.

2. The method according to claim 1, wherein when the number of the CSI-RS ports is larger than a first threshold value, at least two inter-CSI-RS-port multiplexing schemes are used for the M candidate RS resource patterns.

3. The method according to claim 1, wherein when the number of the CSI-RS ports is larger than a second threshold value, at least two types of RS densities are used for the M candidate RS resource patterns.

4. The method according to claim 1, wherein the M candidate RS resource patterns are divided into two sets, a first type of RS density is used for a first set, a second type of RS density is used for a second set, and the first type of RS density is different from the second type of RS density.

5. The method according to claim 1, wherein in an RS resource pattern set, the inter-CSI-RS-port multiplexing scheme uses a code division multiplexing length of 4, and four Resource Elements (REs), to which each group of code division multiplexed RS symbols are mapped, are located on two continuous subcarriers.

6. The method according to claim 1, wherein the M candidate RS resource patterns are divided into two sets; in a first set, code division multiplexed RS symbols in a same group are mapped to REs in a first mapping manner; in a second set, code division multiplexed RS symbols in a same group are mapped to REs in a second mapping manner, and the first mapping manner is different from the second mapping manner.

7. The method according to claim 1, wherein the M candidate RS resource patterns are divided into two sets, a first port grouping manner is used for CSI-RS ports of a first set, a second port grouping manner is used for CSI-RS ports of the second set, and the first port grouping manner is different from the second port grouping manner.

8. An apparatus for configuring a Channel State Information-Reference Signal (CSI-RS), comprising: a processor; and a memory storing codes, which, when executed by the processor, cause the processor to perform a method for configuring the CSI-RS, the method comprising: determining configuration information of the CSI-RS; generating signaling comprising the configuration information of the CSI-RS; and transmitting the signaling comprising the configuration information of the CSI-RS, wherein the configuration information comprises: a number of CSI-RS ports, RS resource pattern information and an inter-CSI-RS-port multiplexing scheme, and the RS resource pattern information and the inter-CSI-RS-port multiplexing scheme are jointly-coded in the signaling comprising the configuration information of the CSI-RS; wherein when the number of the CSI-RS ports is larger than 1, the CSI-RS has M candidate RS resource patterns, where M is an integer greater than 1; wherein the M candidate RS resource patterns are divided into a first pattern set and a second pattern set, each of the first pattern set and the second pattern set comprises one or more candidate RS resource patterns, a first multiplexing scheme is used for CSI-RS ports in each candidate RS resource pattern of the first pattern set, a second multiplexing scheme is used for CSI-RS ports in each candidate RS resource pattern of the second pattern set, and the first multiplexing scheme is different from the second multiplexing scheme; and wherein the first multiplexing scheme is a first code division multiplexing with an orthogonal code length of 2, the second multiplexing scheme is a second code division multiplexing with an orthogonal code length of 4.

9. The apparatus according to claim 8, wherein when the number of the CSI-RS ports is larger than a first threshold value, at least two inter-CSI-RS-port multiplexing schemes are used for the M candidate RS resource patterns.

10. The apparatus according to claim 8, wherein the M candidate RS resource patterns comprise that: when the number of the CSI-RS ports is larger than a second threshold value, at least two types of RS densities are used for the M candidate RS resource patterns.

11. The apparatus according to claim 8, wherein in an RS resource pattern set, the inter-CSI-RS-port multiplexing scheme uses a code division multiplexing length of 4, and four Resource Elements (REs), to which each group of code division multiplexed RS symbols are mapped, are located on two continuous subcarriers.

12. The apparatus according to claim 8, wherein the M candidate RS resource patterns are divided into two sets, in a first set, code division multiplexed RS symbols in a same group are mapped to REs in a first mapping manner; in a second set, code division multiplexed RS symbols in a same group are mapped to REs in a second mapping manner, and the first mapping manner is different from the second mapping manner.

13. The apparatus according to claim 8, wherein the M candidate RS resource patterns are divided into two sets, a first port grouping manner is used for CSI-RS ports of a first set, a second port grouping manner is used for CSI-RS ports of a second set, and the first port grouping manner is different from the second port grouping manner.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a schematic diagram of a frame structure type 1.

(2) FIG. 2 is a schematic diagram of a frame structure type 2.

(3) FIG. 3 is a schematic diagram of a downlink resource grid.

(4) FIG. 4 is a resource pattern of a 4-port CSI-RS on an RB pair.

(5) FIG. 5 is a resource pattern of an 8-port CSI-RS 8 on an RB pair.

(6) FIG. 6 is a flowchart of a method for configuring a CSI-RS according to an embodiment of the disclosure.

(7) FIG. 7 is a schematic diagram of a device for configuring a CSI-RS according to an embodiment of the disclosure.

(8) FIG. 8 is a schematic diagram of code division multiplexing of each group of CSI-RSs to four REs of continuous subcarriers in the case of 16 ports.

(9) FIG. 9 is a schematic diagram of code division multiplexing of each group of CSI-RSs to four REs of continuous subcarriers in the case of 12 ports.

(10) FIG. 10 is a pattern with a maximum frequency interval that is smaller than 9 on a PRB pair in the case that an RS density is one RE in each PRB pair for each port.

(11) FIG. 11 is a pattern with a maximum time-domain interval that is smaller than 6.

(12) FIG. 12 is a pattern with a maximum time-domain interval that is smaller than 5.

(13) FIG. 13 is a pattern with an RS density of two REs in every three PRB pairs for each port in the case of 12 ports.

(14) FIG. 14 is a pattern with an RS density of one RE in every two PRB pairs for each port in the case of 12 ports.

(15) FIG. 15 is a pattern combined by a pattern with 8 ports and two patterns with 2 ports in the case that the number of ports of 12.

(16) FIG. 16 is mapping of each group of code division multiplexed RS symbols onto REs of a PRB pair in a 4-port resource pattern.

DETAILED DESCRIPTION

(17) The embodiments of the disclosure will be described below in combination with the drawings in detail. It is to be understood that the embodiments described below are used to describe and explain the disclosure and not intended to limit the disclosure.

(18) FIG. 6 is a flowchart of a method for configuring a CSI-RS according to an embodiment of the disclosure. As shown in FIG. 6, the method for configuring the CSI-RS provided by the embodiment includes the following operations.

(19) In S11, a base station determines configuration information of a CSI-RS.

(20) In S12, the base station generates signaling including the configuration information of the CSI-RS.

(21) In S13, the base station transmits the signaling including the configuration information of the CSI-RS.

(22) Here, the configuration information includes: a number of ports, RS resource pattern information and an inter-CSI-RS-port multiplexing scheme. When the number of the ports is larger than 1, there are M candidate RS resource patterns for the CSI-RS, where M is an integer greater than 1.

(23) Preferably, the M candidate RS resource patterns include that: when the number of the ports is larger than a first threshold value (TH1), at least two inter-CSI-RS-port multiplexing schemes are used for the M candidate RS resource patterns.

(24) Specifically, an RS symbol of a port is transmitted by one port, and data symbols on a PDSCH are transmitted by multiple ports. If an RS symbol of one port is transmitted on an RE, all power on the RE may be used for transmission of the port, and is equivalent to a sum of powers for all ports transmitting data symbols on an RE; and if the power for transmitting an RS symbol by a port is excessively higher than power for transmitting data symbols by the same port, transmission accuracy of the RS symbol may be influenced. A code division multiplexing scheme is used for RS symbols of multiple ports, so that power may be fully utilized, and RS symbol transmission power of each port may be reduced. In the case that the number of the ports is smaller, a smaller code division multiplexing length may be used; in the case that the number of the ports is increased, a larger code division multiplexing length may be used; and in the case that the number of the ports is larger, the number of the ports is split into several groups of a smaller number of ports sometimes, and a smaller code division multiplexing length is used for their RSs. Sometimes for changing a port multiplexing number, a number of time-domain multiplexing OFDM symbols is increased; or, the number of the time-domain multiplexing OFDM symbols is decreased; or, a frequency-domain multiplexing interval is increased; or, the frequency-domain multiplexing interval is decreased.

(25) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into two sets, a first multiplexing scheme is used for CSI-RS ports in the first pattern set, a second multiplexing scheme is used for CSI-RS ports in the second pattern set, and the first multiplexing scheme is different from the second multiplexing scheme.

(26) Specifically, in the case that a total number of provided ports is kept unchanged, a number of ports in a group is large sometimes, a larger number of REs are occupied for their multiplexing, a large number of REs are required to be occupied, and then a multiplexing scheme with a larger number of OFDM symbols is required to be used or a multiplexing scheme with a decreased frequency-domain interval is used; and a number of ports in a group is small sometimes, a smaller number of REs are occupied for their multiplexing, a smaller number of REs are required to be occupied, and then a multiplexing scheme with a smaller number of OFDM symbols is required to be used or a multiplexing scheme with an increased frequency-domain interval is used.

(27) Specifically, on the other aspect, in the case that the number of the ports is large, an RS resource pattern corresponding to a large code division multiplexing length may be used; and in the case that the number of the ports is large, the RS is split into several RSs with fewer ports sometimes, and an RS resource pattern corresponding to a smaller code division multiplexing length is used for their RSs.

(28) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into two sets, a first multiplexing scheme is used for CSI-RS ports in the first pattern set, the first multiplexing scheme or a second multiplexing scheme is used for CSI-RS ports in the second pattern set, the first multiplexing scheme is different from the second multiplexing scheme, and the multiplexing scheme used for the CSI-RS ports of the second pattern set is configured via signaling of the base station.

(29) Specifically, in the case that a total number of provided ports is kept unchanged, a number of ports in a group is large sometimes, a larger number of REs are occupied for multiplexing of the ports, a larger number of REs are required to be occupied, and then a multiplexing scheme with a larger number of OFDM symbols is required to be used or a multiplexing scheme with a decreased frequency-domain interval is used; and a number of ports in a group is small sometimes, a smaller number of REs are occupied for multiplexing of the ports, a smaller number of REs are required to be occupied, and then a multiplexing scheme with a smaller number of OFDM symbols is required to be used or a multiplexing scheme with an increased frequency-domain interval is used. For making part of patterns applicable to the condition that the number of the ports in the group is large and also applicable to the condition that the number of the ports in the group is small, the first multiplexing scheme is used for the CSI-RS ports of the first pattern set, and the first multiplexing scheme or the second multiplexing scheme is used for the CSI-RS ports of the second pattern set.

(30) Specifically, on the other aspect, in the case that the number of the ports is large, an RS resource pattern corresponding to a larger code division multiplexing length may be used; and in the case that the number of the ports is large, the RS is split into several RSs with fewer ports sometimes, and an RS resource pattern corresponding to a smaller code division multiplexing length is used. For making part of patterns applicable to the condition that the number of the ports is large and also applicable to the condition of splitting into RSs with the fewer ports, the first multiplexing scheme is used for the CSI-RS ports of the first pattern set, and the first multiplexing scheme or the second multiplexing scheme is used for the CSI-RS ports of the second pattern set.

(31) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into three sets, a first multiplexing scheme is used for CSI-RS ports of the first pattern set, a second multiplexing scheme is used for CSI-RS ports of the second pattern set, the first multiplexing scheme or the second multiplexing scheme is used for CSI-RS ports of the third pattern set, the first multiplexing scheme is different from the second multiplexing scheme, and the multiplexing scheme used for the CSI-RS ports of the third pattern set is configured via signaling of the base station.

(32) Specifically, in the case that a total number of provided ports is kept unchanged, the number of ports in a group is large sometimes, a larger number of REs are occupied for multiplexing of the ports, a larger number of REs are required to be occupied, and then a multiplexing scheme with a larger number of OFDM symbols is required to be used or a multiplexing scheme with a decreased frequency-domain interval is used; and the number of ports in a group is small sometimes, a smaller number of REs are occupied for multiplexing of the ports, a smaller number of REs are required to be occupied, and then a multiplexing scheme with a smaller number of OFDM symbols is required to be used or a multiplexing scheme with an increased frequency-domain interval is used. For making part of patterns applicable to the condition that the number of the ports in the group is larger and also applicable to the condition that the number of the ports in the group is smaller, the first multiplexing scheme is used for the CSI-RS ports of the first pattern set, the first multiplexing scheme or the second multiplexing scheme is used for the CSI-RS ports of the second pattern set, and the first multiplexing scheme or the second multiplexing scheme is used for the CSI-RS ports of the third pattern set.

(33) Specifically, in the case that the number of the ports is small, a smaller code division multiplexing length may be used; in the case that the number of the ports is increased, a larger code division multiplexing length may be used; and the in the case that the number of the port is larger, the RS is split into several RSs with fewer ports, and a smaller code division multiplexing length is used. Part of patterns are applied to the condition of splitting into several RSs with fewer ports, part of patterns are applied to the condition that the number of the ports is large, and part of patterns are not only applied to the condition of splitting into several RSs with fewer ports but also applied to the condition that the number of the ports is large.

(34) Preferably, the multiplexing scheme is a code division multiplexing scheme.

(35) Preferably, the first code division multiplexing scheme is code division multiplexing with an orthogonal code length of 2, and the second code division multiplexing scheme is code division multiplexing with an orthogonal code length of 4.

(36) Preferably, the M candidate RS resource patterns include that: when the number of the ports is larger than a second threshold value, at least two types of RS densities are used for the M candidate RS resource patterns.

(37) Specifically, there are certain limits made to REs which may be configured to transmit CSI-RSs in a PRB pair. For example, under an NCP condition, the number of REs configured for CSI-RS transmission of a frame structure type 1 and a frame structure type 2 is 40. In the case that the number of the ports is increased and an RS density of each port is kept unchanged, available RS resource patterns are reduced. For example, there are 5 RS resource patterns for 8-port CSI-RSs under a density of one RE in each PRB pair for each port, while there may be merely two RS resource patterns for 16-port CSI-RSs under a density of one RE in each PRB pair for each port. For providing more RS patterns in the case that the number of the ports is larger, a manner of reducing the RS density of the ports may be used. However, under the condition of low channel relevance and frequency-domain relevance, reducing the RS density may influence channel estimation performance, and it may be necessary to reserve resource patterns under higher RS density. Therefore, in the case that the number of the ports is larger, using multiple types of RS densities may not only provide more RS patterns but also ensure channel estimation performance under a complex condition.

(38) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into two sets, a first type of RS density is used for the first pattern set, a second type of RS density is used for the second pattern set, and the first type of RS density is different from the second type of RS density.

(39) Here, the two pattern sets correspond to two types of RS densities respectively, and may be selected for use according to a practical condition.

(40) Preferably, the M candidate RS resource patterns include that: in an RS resource pattern set, the inter-CSI-RS-port multiplexing scheme uses a code division multiplexing length of 4, and four REs for mapping of each group of code division multiplexed RS symbols are located on two continuous subcarriers.

(41) Specifically, an RS on each port is transmitted by the single port, and for fully utilizing power, power higher than data transmission power on a single port is used to transmit the RS. Since power may still not be fully utilized to transmit an RS under a limit of a peak-to-average ratio of a power device, a code division multiplexing scheme is used. If channel coefficients between REs for code division multiplexing are greatly different, greater interference may be introduced. There are substantially no difference between channel coefficients of adjacent subcarriers, so that REs for code division multiplexing mapping on continuous subcarriers may be selected to solve the problem.

(42) Preferably, the M candidate RS resource patterns include that: a maximum frequency interval of REs on a PRB pair in a pattern of which an RS density is one RE in each PRB pair for each port is less than or equal to the number, which is a third threshold value (TH3), of subcarriers, and the maximum frequency interval is a difference between a highest frequency and a lowest frequency of frequency bands in which the REs are located.

(43) Alternatively, the third threshold value is 9.

(44) Specifically, channel estimation with a CSI-RS requires comparison between channel coefficients of each port, and an excessive frequency interval of REs of the same pattern on the same PRB pair may introduce a phase comparison error between different ports due to a frequency change of a channel. The third threshold value TH3 is 9, so that the REs may be prevented from being simultaneously distributed in the vicinity of a lowest frequency and in the vicinity of a highest frequency of the same RB.

(45) Preferably, the M candidate RS resource patterns include that: a maximum time-domain interval of REs on each RS resource pattern is smaller than a fourth threshold value (TH4), where the maximum time-domain interval is a difference value between a last one and a first one of OFDM symbols in which the REs are located.

(46) Alternatively, the fourth threshold value is 6.

(47) Alternatively, the fourth threshold value is 5.

(48) Specifically, channel estimation with a CSI-RS requires comparison between channel coefficients of each port, and an excessive time interval of REs of the same pattern may introduce a phase comparison error between different ports due to a time change of a channel. The fourth threshold value is 5, so that CSI-RSs of the same pattern may be controlled to use five OFDM symbols at a smallest interval in OFDM symbols for conventional CSI-RS mapping. The fourth threshold value is 6, so that the CSI-RSs of the same pattern may be controlled to use OFDM symbols at largest intervals in the OFDM symbols for conventional CSI-RS mapping.

(49) Preferably, the M candidate RS resource patterns include that: when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to an RS resource pattern under a number of ports of 8, moreover, an RS density is two REs in every three PRB pairs for each port, and different RS resource patterns correspond to different 8-port RS resource patterns.

(50) Specifically, when the number of the ports is 12, an RS resource pattern uses an 8-port RS resource pattern, meanwhile, the RS density is decreased, and a larger number of RS resource patterns may be provided compared with adoption of the RS density of one RE in each PRB pair for each port. In addition, for avoiding waste of REs, the RS density of two REs in every three PRB pairs for each port is used.

(51) Preferably, the M candidate RS resource patterns include that: when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to an RS resource pattern under a number of ports of 4 and an RS resource pattern under a number of ports of 2 and is on the same two OFDM symbols, an RS density is one RE in every two PRB pairs for each port, and different RS resource patterns correspond to combinations of different RS resource patterns under the number of the ports of 4 and RS resource patterns under the number of the ports of 2.

(52) Specifically, when the number of the ports is 12, an RS resource pattern uses a combination of a 4-port RS resource pattern and a 2-port RS resource pattern, meanwhile, the RS density is decreased, and a larger number of RS resource patterns may be provided compared with adoption of the RS density of one RE in each PRB pair for each port. Using the same two OFDM symbols rather than more OFDM symbols may avoid introduction of a channel estimation error due to an excessive distribution of the RS patterns on the time domain.

(53) Preferably, the M candidate RS resource patterns include that: when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to an 8-port RS resource pattern and two 2-port RS resource patterns, moreover, the two RS resource patterns under the two port numbers are located on the same two OFDM symbols and adjacent in frequency domain, an RS density is one RE in each PRB pair for each port, and different RS resource patterns correspond to combinations of different 8-port RS resource patterns and 2-port RS resource patterns.

(54) Specifically, when the number of the ports is 12, an RS resource pattern uses a combination of an 8-port RS resource pattern and two 2-port RS resource patterns, where the two 2-port RS resource patterns may flexibly form multiple combinations to implement multiple port multiplexing schemes.

(55) Preferably, the M candidate RS resource patterns include that: when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to two groups of ports, a first code division multiplexing scheme is used for the first group of ports, a second code division multiplexing scheme is used for the second group of ports, and the first code division multiplexing scheme is different from the second code division multiplexing scheme.

(56) Here, different multiplexing schemes are used for the two groups of ports respectively, and the same pattern meets two different multiplexing schemes.

(57) Preferably, the M candidate RS resource patterns include that: in an RS resource pattern set, each RS resource pattern corresponds to two groups of ports, a first code division multiplexing scheme is used for the first group of ports, the first code division multiplexing scheme or a second code division multiplexing scheme is used for the second group of ports, the first code division multiplexing scheme is different from the second code division multiplexing scheme, and the code division multiplexing scheme used for the second group of ports is configured via signaling of the base station.

(58) Specifically, there may be two corresponding code division multiplexing schemes in the same RS pattern, the first code division multiplexing scheme is used for the first group of ports, and the first code division multiplexing scheme or the second code division multiplexing scheme may be used for the second group of ports, so that compatibility of the second group of ports is improved.

(59) Preferably, the M candidate RS resource patterns include that: in an RS resource pattern set, each RS resource pattern corresponds to two groups of ports, a first code division multiplexing scheme or a second code division multiplexing scheme is used for the first group of ports, the first code division multiplexing scheme or the second code division multiplexing scheme is used for the second group of ports, the first code division multiplexing scheme is different from the second code division multiplexing scheme, the code division multiplexing scheme used for the first group of ports is configured via signaling of the base station, and the code division multiplexing scheme used for the second group of ports is configured by the signaling of the base station.

(60) Specifically, there may be two corresponding code division multiplexing schemes in the same RS pattern, the first code division multiplexing scheme or the second code division multiplexing scheme is used for the first group of ports, and the first code division multiplexing scheme or the second code division multiplexing scheme may be used for the second group of ports, so that compatibility of the first group of ports and the second group of ports is improved.

(61) Preferably, the M candidate RS resource patterns include that: in an RS resource pattern set, the inter-CSI-RS-port multiplexing scheme uses a code division multiplexing length of 4, and code division multiplexed RS symbols of each group are mapped to REs on a PRB pair in a 4-port resource pattern.

(62) Specifically, a manner of mapping code division multiplexed RS symbols in a same group to REs is added to map 4 ports in a same group to a 4-port resource pattern to achieve compatibility with a conventional 4-port RS resource pattern.

(63) Preferably, the operation that the base station determines the configuration information of the CSI-RS includes that: when the code division multiplexing length is 4, a first mapping manner or a second mapping manner is used to map at least one group of code division multiplexed RS symbols to REs. The first mapping manner is mapping the code division multiplexed RS symbols onto continuous subcarriers, the second mapping manner is mapping the code division multiplexed RS symbols onto discontinuous subcarriers and the manner of mapping the group of the code division multiplexed RS symbols to the REs is configured via signaling of the base station.

(64) Specifically, the first mapping manner may achieve a channel estimation performance gain for code division multiplexing, and the second mapping manner does not require continuity of the subcarriers, has higher mapping flexibility, and may be compatible with a conventional 4-port RS pattern. The manner of mapping the code division multiplexed RS symbols in a same group to the REs is notified via the signaling to meet a requirement of a practical scenario.

(65) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into two sets, in a first pattern set, a first mapping manner is used to map code division multiplexed RS symbols in a same group to REs, and in a second pattern set, a second mapping manner is used to map code division multiplexed RS symbols in a same group to REs, and the first mapping manner is different from the second mapping manner.

(66) The two sets correspond to different manners of mapping the RS symbols to the REs respectively to meet different requirements.

(67) Preferably, the operation that the base station determines the configuration information of the CSI-RS includes that: when the inter-CSI-RS-port multiplexing scheme uses the code division multiplexing length of 4 and the ports are grouped for code division multiplexing, a port grouping manner is configured via signaling of the base station, the port grouping manner including two port grouping manners.

(68) Specifically, there are two port grouping manners for the ports to meet different grouping requirements, and notification with the signaling may facilitate use of different port grouping manners according to the requirement of the practical scenario.

(69) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into two sets, a first port grouping manner is used for CSI-RS ports in the first pattern set, a second port grouping manner is used for CSI-RS ports in the second pattern set, and the first port grouping manner is different from the second port grouping manner.

(70) The two sets correspond to different port grouping manners respectively to meet different requirements.

(71) FIG. 7 is a schematic diagram of a device for configuring a CSI-RS according to an embodiment of the disclosure. As shown in FIG. 7, the device for configuring the CSI-RS provided by the embodiment is arranged at a base station, and includes: a determination module 1101, a generation module 1102 and a transmission module 1103, wherein the determination module 1101 is arranged to determine configuration information of a CSI-RS; the generation module 1102 is configured to generate signaling including the configuration information of the CSI-RS; and the transmission module 1103 is configured to transmit the signaling including the configuration information of the CSI-RS, wherein the configuration information includes: a number of ports, RS resource pattern information and an inter-CSI-RS-port multiplexing scheme; and when the number of the ports is larger than 1, there exist M candidate RS resource patterns for the CSI-RS, where M is an integer greater than 1.

(72) Preferably, the M candidate RS resource patterns include that: when the number of the ports is larger than a first threshold value, at least two inter-CSI-RS-port multiplexing schemes are used for the M candidate RS resource patterns.

(73) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into two sets, a first multiplexing scheme is used for CSI-RS ports of the first pattern set, a second multiplexing scheme is used for CSI-RS ports of the second pattern set, and the first multiplexing scheme is different from the second multiplexing scheme.

(74) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into two sets, a first multiplexing scheme is used for CSI-RS ports of the first pattern set, the first multiplexing scheme or a second multiplexing scheme is used for CSI-RS ports of the second pattern set, the first multiplexing scheme is different from the second multiplexing scheme, and the multiplexing scheme used for the CSI-RS ports of the second pattern set is configured via signaling of a base station.

(75) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into three sets, a first multiplexing scheme is used for CSI-RS ports of the first pattern set, a second multiplexing scheme is used for CSI-RS ports of the second pattern set, the first multiplexing scheme or the second multiplexing scheme is used for CSI-RS ports of the third pattern set, the first multiplexing scheme is different from the second multiplexing scheme, and the multiplexing scheme used for the CSI-RS ports of the third pattern set is configured via signaling of the base station.

(76) Preferably, the multiplexing scheme is a code division multiplexing scheme.

(77) Preferably, the first code division multiplexing scheme is code division multiplexing with an orthogonal code length of 2, and the second code division multiplexing scheme is code division multiplexing with an orthogonal code length of 4.

(78) Preferably, the M candidate RS resource patterns include that: when the number of the ports is larger than a second threshold value, at least two types of RS densities are used for the M candidate RS resource patterns.

(79) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into two sets, a first type of RS density is used for the first pattern set, a second type of RS density is used for the second pattern set, and the first type of RS density is different from the second type of RS density.

(80) Preferably, the M candidate RS resource patterns include that: in an RS resource pattern set, the inter-CSI-RS-port multiplexing scheme uses a code division multiplexing length of 4, and four REs for mapping of code division multiplexed RS symbols of each group are located on two continuous subcarriers.

(81) Preferably, the M candidate RS resource patterns include that: a maximum frequency interval of REs on a PRB pair in a pattern of which an RS density is one RE in each PRB pair for each port is less than or equal to the number, which is a third threshold value, of subcarriers, and the maximum frequency interval is a difference between a highest frequency and a lowest frequency of frequency bands in which the REs are located.

(82) Alternatively, the third threshold value is 9.

(83) Preferably, the M candidate RS resource patterns include that: a maximum time-domain interval of REs on each RS resource pattern is smaller than a fourth threshold value, wherein the maximum time-domain interval is a difference value between a last one and a first one of OFDM symbols in which the REs are located.

(84) Alternatively, the fourth threshold value is 6.

(85) Alternatively, the fourth threshold value is 5.

(86) Preferably, the M candidate RS resource patterns include that: when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to an RS resource pattern under a number of ports of 8, moreover, an RS density is two REs in every three PRB pairs for each port, and different RS resource patterns correspond to different RS resource patterns under the number of the ports of 8.

(87) Preferably, the M candidate RS resource patterns include that: when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to an RS resource pattern under a number of ports of 4 and an RS resource pattern under a number of ports of 2 and is on the same two OFDM symbols, an RS density is one RE in every two PRB pairs for each port, and different RS resource patterns correspond to combinations of different RS resource patterns under the number of the ports of 4 and RS resource patterns under the number of the ports of 2.

(88) Preferably, the M candidate RS resource patterns include that: when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to an RS resource pattern under a number of ports of 8 and two RS resource patterns under a number of ports of 2, moreover, the two RS resource patterns under the two port numbers are located on the same two OFDM symbols and adjacent on a frequency domain, an RS density is one RE in each PRB pair for each port, and different RS resource patterns correspond to combinations of different RS resource patterns under the number of the ports of 8 and RS resource patterns under the number of the ports of 2.

(89) Preferably, the M candidate RS resource patterns include that: when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to two groups of ports, a first code division multiplexing scheme is used for the first group of ports, a second code division multiplexing scheme is used for the second group of ports, and the first code division multiplexing scheme is different from the second code division multiplexing scheme.

(90) Preferably, the M candidate RS resource patterns include that: in an RS resource pattern set, each RS resource pattern corresponds to two groups of ports, a first code division multiplexing scheme is used for the first group of ports, the first code division multiplexing scheme or a second code division multiplexing scheme is used for the second group of ports, the first code division multiplexing scheme is different from the second code division multiplexing scheme, and the code division multiplexing scheme used for the second group of ports is configured via signaling of the base station.

(91) Preferably, the M candidate RS resource patterns include that: in an RS resource pattern set, each RS resource pattern corresponds to two groups of ports, a first code division multiplexing scheme or a second code division multiplexing scheme is used for the first group of ports, the first code division multiplexing scheme or the second code division multiplexing scheme is used for the second group of ports, the first code division multiplexing scheme is different from the second code division multiplexing scheme, the code division multiplexing scheme used for the first group of ports is configured via signaling of the base station, and the code division multiplexing scheme used for the second group of ports is configured by the signaling of the base station.

(92) Preferably, the M candidate RS resource patterns include that: in an RS resource pattern set, the inter-CSI-RS-port multiplexing scheme uses a code division multiplexing length of 4, and code division multiplexed RS symbols of each group are mapped to REs on a PRB pair in a resource pattern under the number of the ports of 4.

(93) Preferably, that the determination module is configured to determine the configuration information of the CSI-RS includes that: when the code division multiplexing length is 4, a first mapping manner or a second mapping manner is used to map at least one group of code division multiplexed RS symbols to REs, the first mapping manner being mapping the code division multiplexed RS symbols onto continuous subcarriers, the second mapping manner being mapping the code division multiplexed RS symbols onto discontinuous subcarriers and the manner for mapping the code division multiplexed RS symbols of the group to the REs being configured via signaling of the base station.

(94) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into two sets, in a first pattern set, a first mapping manner is used to map code division multiplexed RS symbols in a same group to REs, and in a second pattern set, a second mapping manner is used to map code division multiplexed RS symbols in a same group to REs, and the first mapping manner is different from the second mapping manner.

(95) Preferably, that the determination module is configured to determine the configuration information of the CSI-RS includes that: when the inter-CSI-RS-port multiplexing scheme uses the code division multiplexing length of 4 and the ports are grouped for code division multiplexing, a port grouping manner is configured via signaling of the base station, the port grouping manner including two types.

(96) Preferably, the M candidate RS resource patterns include that: the M candidate RS resource patterns are divided into two sets, a first port grouping manner is used for CSI-RS ports of the first pattern set, a second port grouping manner is used for CSI-RS ports of the second pattern set, and the first port grouping manner is different from the second port grouping manner.

(97) During a practical application, the transmission module is a communication component with an information transmission capability, for example, a transmitter, and the determination module and the generation module are components with an information processing capability, for example, a processor. However, there are no limits made in the disclosure. The modules may be, for example, combinations of software and/or hardware capable of realizing certain functions.

(98) The disclosure will be described below with multiple specific embodiments.

Embodiment 1

(99) In the embodiment, a base station determines configuration information of a CSI-RS at first, then generates signaling including the configuration information of the CSI-RS and finally transmits the signaling including the configuration information of the CSI-RS. For example, a bits are used to represent port number information, b bits are used to represent RS resource pattern information, and c bits are used to represent an inter-CSI-RS-port multiplexing scheme, where a+b+c=X.

(100) Or, a bits may be used to represent the port number information, and b bits are used to represent a joint code of the RS resource pattern information and the inter-CSI-RS-port multiplexing scheme, where a+b=X.

(101) Or, X bits may be used to represent joint coding of the port number information, the RS resource pattern information and the inter-CSI-RS-port multiplexing scheme.

(102) Or, a bits may be used to represent the port number information, b bits are used to represent the RS resource pattern information, and meanwhile, the RS resource pattern information prompts the inter-CSI-RS-port multiplexing scheme.

(103) Herein, the number of ports may be selected from {1, 2, 4, 8, 12, 16}.

(104) When the number of the ports is larger than 1, there may be M candidate RS resource patterns for the CSI-RS, where M is an integer greater than 1.

Embodiment 2

(105) In the embodiment, when the number of the ports is larger than a first threshold value (TH1), the M candidate RS resource patterns adopt at least two inter-CSI-RS-port code division multiplexing schemes, where M is an integer greater than 1. TH1 may be selected from {4, 8, 12}. The inter-CSI-RS-port code division multiplexing schemes include code division multiplexing with a length of 2, code division multiplexing with a length of 4, code division multiplexing in time domain, code division multiplexing in frequency domain, code division multiplexing in both the time domain and the frequency domain and a combination of the manners.

Embodiment 3

(106) In the embodiment, the M candidate RS resource patterns are divided into two sets, a first multiplexing scheme is used for CSI-RS ports of the first pattern set, a second multiplexing scheme is used for CSI-RS ports of the second pattern ports, and the first multiplexing scheme is different from the second multiplexing scheme, wherein M is an integer greater than 1.

(107) For example, the first code division multiplexing scheme used for the CSI-RS ports of the first pattern sets uses a code division multiplexing length of 2, and the second code division multiplexing scheme used for the CSI-RS ports of the second pattern set uses a code division multiplexing length of 4; or the first code division multiplexing scheme used for the CSI-RS ports of the first pattern set uses the code division multiplexing length of 4, and the second code division multiplexing scheme used for the CSI-RS ports of the second pattern set uses the code division multiplexing length of 2.

Embodiment 4

(108) In the embodiment, the M candidate RS resource patterns are divided into two sets, a first multiplexing scheme is used for CSI-RS ports of the first pattern set, the first multiplexing scheme or a second multiplexing scheme is used for CSI-RS ports of the second pattern set, and the first multiplexing scheme is different from the second multiplexing scheme, where M is an integer greater than 1. The multiplexing scheme used for the CSI-RS ports of the second pattern set is configured via signaling of the base station.

(109) For example, the first code division multiplexing scheme used for the CSI-RS ports of the first pattern sets uses a code division multiplexing length of 2, and the code division multiplexing scheme used for the CSI-RS ports of the second pattern set uses a code division multiplexing length of 2 or 4; or the first code division multiplexing scheme used for the CSI-RS ports of the first pattern set uses the code division multiplexing length of 4, and the code division multiplexing scheme used for the CSI-RS ports of the second pattern set uses the code division multiplexing length of 2 or 4, where the code division multiplexing length used for the CSI-RS ports of the second pattern set is configured via signaling of the base station.

Embodiment 5

(110) In the embodiment, the M candidate RS resource patterns are divided into three sets, a first multiplexing scheme is used for CSI-RS ports of the first pattern set, a second multiplexing scheme is used for CSI-RS ports of the second pattern set, the first multiplexing scheme or the second multiplexing scheme is used for CSI-RS ports of the third pattern set, and the first multiplexing scheme is different from the second multiplexing scheme, where M is an integer greater than 1. The multiplexing scheme used for the CSI-RS ports of the third pattern set is configured via signaling of the base station.

(111) For example, the first code division multiplexing scheme used for the CSI-RS ports of the first pattern sets uses a code division multiplexing length of 2, the second code division multiplexing scheme used for the CSI-RS ports of the second pattern set uses a code division multiplexing length of 4, and the code division multiplexing scheme used for the CSI-RS ports of the third pattern set uses the code division multiplexing length of 2 or 4; or the first code division multiplexing scheme used for the CSI-RS ports of the first pattern set uses the code division multiplexing length of 4, the second code division multiplexing scheme used for the CSI-RS ports of the second pattern set uses the code division multiplexing length of 2, and the code division multiplexing scheme used for the CSI-RS ports of the third pattern set uses the code division multiplexing length of 2 or 4, where the code division multiplexing length used for the CSI-RS ports of the third pattern set is configured via signaling of the base station.

Embodiment 6

(112) In the embodiment, when the number of the ports is larger than a second threshold value (TH2), at least two types of RS densities are used for the M candidate RS resource patterns, where M is an integer greater than 1.

(113) For example, when TH2 is 8 and the number of the ports is 12, there are the following three types of RS densities: one RE in each PRB pair for each port, one RE in every two PRB pairs for each port and two REs in every three PRB pairs for each port; and when TH2 is 8 and the number of the ports is 16, there are the following two types of RS densities: one RE in each PRB pair for each port and one RE in every two PRB pairs for each port.

Embodiment 7

(114) In the embodiment, the M candidate RS resource patterns are divided into two sets, a first type of RS density is used for the first pattern set, a second type of RS density is used for the second pattern set, and the first type of RS density is different from the second type of RS density, where M is an integer greater than 1.

(115) For example, the RS density used for the first pattern set is one RE in each PRB pair for each port, and the RS density used for the second pattern set is one RE in every two PRB pairs for each port; or, the RS density used for the first pattern set is one RE in every two PRB pairs for each port, and the RS density used for the second pattern set is one RE in each PRB pair for each port.

Embodiment 8

(116) In the embodiment, in an RS resource pattern set, the inter-CSI-RS-port multiplexing scheme uses a code division multiplexing length of 4, and four REs for mapping of each group of code division multiplexed RS symbols are located on two continuous subcarriers.

(117) As shown in FIG. 8, in the case that the number of the ports is 16, CSI-RSs of each group are code division multiplexed to four REs of continuous subcarriers, there are two RS resource patterns in FIG. 8: CSI-RS RE for config #0 and CSI-RS RE for config #1, and in each RS resource pattern, the 16 ports are divided into four groups: {15, 16, 17, 18}, {19, 20, 21, 22}, {23, 24, 25, 26} and {27, 28, 29, 30}, and the four REs for code division multiplexing mapping of the ports of each group are located on two continuous subcarriers.

(118) As shown in FIG. 9, in the case that the number of the ports is 12, each group of the CSI-RSs are code division multiplexed to four REs of continuous subcarriers, there are three RS resource patterns in FIG. 9, i.e., CSI-RS RE for config #0, CSI-RS RE for config #1 and CSI-RS RE for config #2, and in each RS resource pattern, the 12 ports are divided into three groups: {15, 16, 17, 18}, {19, 20, 21, 22} and {23, 24, 25, 26}, and the four REs for code division multiplexing mapping of the ports of each group are located on two continuous subcarriers.

Embodiment 9

(119) In the embodiment, a maximum frequency interval of REs on a PRB pair in a pattern of which an RS density is one RE in each PRB pair for each port is not larger than (namely, less than or equal to) the number, which is a third threshold value (TH3), of subcarriers, that is, the maximum frequency interval is a difference between a highest frequency and a lowest frequency of frequency bands in which the REs are located.

(120) Alternatively, the third threshold value is 9.

(121) FIG. 10 is a pattern with a maximum frequency interval of not larger than 9 on a PRB pair in the case that an RS density is one RE in each PRB pair for each port. In FIG. 10, there are totally two patterns: CSI-RS RE for config #0 and CSI-RS RE for config #1, where a maximum frequency interval on a PRB pair in the pattern 0 is 7 subcarriers, and a maximum frequency interval on a PRB pair in the pattern 1 is 9 subcarriers.

Embodiment 10

(122) In the embodiment, a maximum time-domain interval of REs on each RS resource pattern is smaller than a fourth threshold value (TH4), and the maximum time-domain interval is a difference value between a last one and a first one of OFDM symbols in which the REs are located.

(123) Alternatively, the fourth threshold value is 6.

(124) FIG. 11 is a pattern with a maximum time-domain interval smaller than 6. In FIG. 11, there are totally two patterns: CSI-RS RE for config #0 and CSI-RS RE for config #1, a maximum time-domain interval of the pattern 0 is 5, and a maximum time-domain interval of the pattern 1 is 4.

(125) Alternatively, the fourth threshold value is 5.

(126) FIG. 12 is a pattern with a maximum time-domain interval smaller than 5. In FIG. 12, there are totally two patterns: CSI-RS RE for config #0 and CSI-RS RE for config #1, a maximum time-domain interval of the pattern 0 is 1, and a maximum time-domain interval of the pattern 1 is 4.

Embodiment 11

(127) In the embodiment, when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to an 8-port RS resource pattern, an RS density is two REs in every three PRB pairs for each port, and different RS resource patterns correspond to different RS resource patterns under the number of the ports of 8.

(128) FIG. 13 is a pattern with an RS density of two REs in every three PRB pairs for each port in the case of 12 ports. In FIG. 13, there are totally five patterns: CSI-RS RE for config #0, CSI-RS RE for config #1, CSI-RS RE for config #0=2. CSI-RS RE for config #3 and CSI-RS RE for config #4.

Embodiment 12

(129) In the embodiment, when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to a 4-port RS resource pattern and a 2-port RS resource pattern and is on the same two OFDM symbols, an RS density is one RE in every two PRB pairs for each port, and different RS resource patterns correspond to different combinations of 4-port RS resource patterns and 2-port RS resource patterns.

(130) FIG. 14 is a pattern with an RS density of one RE in every two PRB pairs for each port in the case of 12 ports. In FIG. 14, there are totally five patterns: CSI-RS RE for config #0, CSI-RS RE for config #1, CSI-RS RE for config #0=2. CSI-RS RE for config #3 and CSI-RS RE for config #4.

Embodiment 13

(131) In the embodiment, when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to an 8-port RS resource pattern and two 2-port RS resource patterns, moreover, the RS resource patterns with the two numbers of ports are located on the same two OFDM symbols and adjacent in frequency domain, an RS density is one RE in each PRB pair for each port, and different RS resource patterns correspond to different combinations of 8-port RS resource patterns and 2-port RS resource patterns.

(132) FIG. 15 is a pattern formed by a combination of an 8-port pattern and two 2-port patterns in the case that the number of the ports of 12. In FIG. 15, the RS density of the pattern is one RE in each PRB pair for each port.

Embodiment 14

(133) In the embodiment, when the number of the ports is 12, in an RS resource pattern set, each RS resource pattern corresponds to two groups of ports, a first code division multiplexing scheme is used for the first group of ports, a second code division multiplexing scheme is used for the second group of ports, and the first code division multiplexing scheme is different from the second code division multiplexing scheme.

(134) For example, ports {15, 16, 17, 18, 19, 20, 21, 22} form the first group and adopt the first code division multiplexing scheme, and ports {23, 24, 25, 26} form the second group and adopt the second code division multiplexing scheme; or, the ports {15, 16, 17, 18, 19, 20, 21, 22} form the first group and adopt the second code division multiplexing scheme, and the ports {23, 24, 25, 26} form the second group and adopt the first code division multiplexing scheme.

Embodiment 15

(135) In the embodiment, in an RS resource pattern set, each RS resource pattern corresponds to two groups of ports, a first code division multiplexing scheme is used for the first group of ports, the first code division multiplexing scheme or a second code division multiplexing scheme is used for the second group of ports, and the first code division multiplexing scheme is different from the second code division multiplexing scheme. The code division multiplexing scheme used for the second group of ports is configured via signaling of the base station.

(136) For example, a code division multiplexing scheme with a length of 2 is used for the first group of ports, a code division multiplexing scheme with a length of 2 or 4 is used for the second group of ports, and the code division multiplexing scheme used for the second group of ports is configured via signaling of the base station; or, the code division multiplexing scheme with the length of 4 is used for the first group of ports, the code division multiplexing scheme with the length of 4 is used for the second group of ports, and the code division multiplexing scheme used for the second group of ports is configured via signaling of the base station.

Embodiment 16

(137) In the embodiment, in an RS resource pattern set, each RS resource pattern corresponds to two groups of ports, a first code division multiplexing scheme or a second code division multiplexing scheme is used for the first group of ports, the first code division multiplexing scheme or the second code division multiplexing scheme is used for the second group of ports, and the first code division multiplexing scheme is different from the second code division multiplexing scheme. The code division multiplexing scheme used for the first group of ports is configured via signaling of the base station, and the code division multiplexing scheme used for the second group of ports is configured by the signaling of the base station.

(138) For example, a code division multiplexing scheme with a length of 2 or 4 may be used for the first group of ports, the code division multiplexing scheme with the length of 2 or 4 may be used for the second group of ports, and the code division multiplexing schemes used for the first group of ports and the second group of ports are configured via signaling of the base station.

Embodiment 17

(139) In the embodiment, in an RS resource pattern set, the inter-CSI-RS-port multiplexing scheme uses a code division multiplexing length of 4, and each group of code division multiplexed RS symbols are mapped to REs on a PRB pair in a 4-port resource pattern.

(140) FIG. 4 is a pattern in the case of 4 ports. There are totally 10 patterns in FIG. 4: CSI-RS RE for config #0, CSI-RS RE for config #1, CSI-RS RE for config #2, CSI-RS RE for config #3, CSI-RS RE for config #4, CSI-RS RE for config #5, CSI-RS RE for config #6. CSI-RS RE for config #7, CSI-RS RE for config #8 and CSI-RS RE for config #9.

(141) FIG. 16 is mapping of each group of code division multiplexed RS symbols onto REs of a PRB pair in a 4-port resource pattern. In FIG. 16, the ports are grouped as follows: {15, 16, 19, 20}, {17, 18, 21, 22}, {23, 24, 27, 28} and {25, 26, 29, 30}, and the code division multiplexed RS symbols of each group are mapped to REs of a PRB pair in a 4-port resource pattern.

Embodiment 18

(142) In the embodiment, in the case that the code division multiplexing length is 4, a manner for mapping at least one group of code division multiplexed RS symbols to REs is configured via signaling of the base station. There are two types of mapping manners, the first mapping manner is mapping the code division multiplexed RS symbols onto continuous subcarriers, and the second mapping manner is mapping the code division multiplexed RS symbols onto discontinuous subcarriers.

(143) For example, the first mapping manner is mapping the code division multiplexed RS symbols onto two continuous subcarriers, and the second mapping manner is mapping the code division multiplexed RS symbols onto two subcarriers having a frequency-domain difference value of 6 subcarriers.

Embodiment 19

(144) In the embodiment, the M candidate RS resource patterns are divided into two sets. In a first pattern set, code division multiplexed RS symbols in a same group are mapped to REs in a first mapping manner; and in a second pattern set, a second mapping manner is used to map code division multiplexed RS symbols in a same group to REs, and the first mapping manner is different from the second mapping manner, wherein M is an integer greater than 1.

(145) For example, a continuous subcarrier mapping type manner is used for the first pattern set, and a discontinuous subcarrier mapping type manner is used for the second pattern set.

Embodiment 20

(146) In the embodiment, in the case that the code division multiplexing length is 4 and the ports are grouped for code division multiplexing, a type of a port grouping manner is configured via signaling of the base station, and there are two types of port grouping manners.

(147) For example, the first port grouping manner is as follows: {15, 16, 17, 18}, {19, 20, 21, 22}, {23, 24, 25, 26} and {27, 28, 29, 30}; and the second port grouping manner is as follows: {15, 16, 19, 20}, {17, 18, 21, 22}, {23, 24, 27, 28} and {25, 26, 29, 30}.

Embodiment 21

(148) In the embodiment, the M candidate RS resource patterns are divided into two sets, a first port grouping manner is used for CSI-RS ports of the first pattern set, a second port grouping manner is used for CSI-RS ports of the second pattern set, and the first port grouping manner is different from the second port grouping manner, where M is an integer greater than 1.

(149) For example, the first port grouping manner is used for the CSI-RS ports of the first pattern set, and the second port grouping manner is used for the CSI-RS ports of the second pattern set.

(150) The first port grouping manner is as follows: {15, 16, 17, 18}. {19, 20, 21, 22}, {23, 24, 25, 26} and {27, 28, 29, 30}; and

(151) the second port grouping manner is as follows: {15, 16, 19, 20}, {17, 18, 21, 22}, {23, 24, 27, 28} and {25, 26, 29, 30}.

(152) A basic principle and main characteristics of the disclosure and advantages of the disclosure are displayed and described above. The disclosure is not limited to the embodiments, the principle of the disclosure is illustrated in the embodiments and the specification, various variations and improvements may further be made to the disclosure without departing from the spirit and scope of the disclosure, and these variations and improvements shall fall within the scope of the disclosure applying for protection.

(153) An embodiment of the disclosure further provides a storage medium. Alternatively, in the embodiment, the storage medium may be configured to store program codes configured to execute the following operations.

(154) In S1, configuration information of a CSI-RS is determined.

(155) In S2, signaling including the configuration information of the CSI-RS is generated.

(156) In S3, the signaling including the configuration information of the CSI-RS is transmitted.

(157) Here, the configuration information may include: a number of ports, RS resource pattern information and an inter-CSI-RS-port multiplexing scheme; and when the number of the ports is larger than 1, there are M candidate RS resource patterns for the CSI-RS, where M is an integer greater than 1.

(158) Alternatively, in the embodiment, the storage medium may include, but not limited to: various media capable of storing program codes, such as a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

(159) Alternatively, specific examples in the embodiment may refer to examples described in the abovementioned embodiments and optional implementation modes and will not be elaborated in the embodiment.

(160) Obviously, those skilled in the art should know that each module or each step of the disclosure may be implemented by a universal computing device, and the modules or steps may be concentrated on a single computing device or distributed on a network formed by a plurality of computing devices, and may alternatively be implemented by program codes executable by the computing devices, so that the modules or steps may be stored in a storage device for execution with the computing devices, the shown or described steps may be executed in sequences different from those described here in some circumstances, or may form each integrated circuit module respectively, or multiple modules or steps therein may form a single integrated circuit module for implementation. As a consequence, the disclosure is not limited to any specific hardware and software combination.

(161) The above is merely the preferred embodiment of the disclosure and not intended to limit the scope of protection of the disclosure. For those skilled in the art, the disclosure may have various modifications and variations. Any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the disclosure shall fall within the scope of protection of the disclosure.

INDUSTRIAL APPLICABILITY

(162) By the embodiments of the disclosure, under the condition of providing a larger RS multiplexing factor, an overhead is reduced, channel estimation quality is improved, transmission and receiving complexity is lowered, and meanwhile, 12 or 16-port CSI-RS transmission can be supported.