WO2018059424A1 - Reference signal mapping method and device - Google Patents

Abstract

Disclosed are a reference signal mapping method and device, used for realizing a CSI-RS mapping of 16 or more ports, so as to realize a CSI-RS transmission of 16 or more ports. The method comprises: according to an N port reference signal pattern, determining that a channel state information reference signal (CSI-RS) is mapped on a resource unit RE, N being an integer greater than 16, wherein, an RE position, having one N port CSI-RS of the N port reference signal pattern mapped thereto, is determined according to an RE position having a CSI-RS in a plurality of groups of 8 port reference signal patterns mapped thereto, each S port in the N port is multiplexed with S code words of 8 code words using an 8-bit orthogonal spreading code, and the 8 port reference signal pattern is an 8 port CSI-RS pattern defined by 3GPP Rel-13; and performing resource mapping on the CSI-RS according to the determined RE.

Description

Reference signal mapping method and device

This application is required to be submitted to the Chinese Patent Office on September 30, 2016, the application number is 201610877424.5, the Chinese patent application titled "a reference signal mapping method and device", and the Chinese Patent Office submitted to the Chinese Patent Office on September 26, 2017. The priority of the Chinese Patent Application No. 201710882643.7, the entire disclosure of which is incorporated herein by reference.

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a reference signal mapping method and apparatus.

Background technique

In the Rel-10 version of the Long Term Evolution (LTE) system, multiple reference signals are defined in the downlink, including: Cell-specific Reference Signal (C-RS) and user-specific reference signal (UE). A specific reference signal (referred to as a UE-RS, also known as a DM-RS, a Demodulation-Reference Signal in English), and a Channel State Indication Reference Signal (CSI-RS). Among them, CSI-RS is used for downlink channel measurement and estimation.

1a, 1b, and 1c respectively show reference signal patterns supporting CSI-RS in an LTE system. The reference signal pattern shows the resource locations of the different reference signals, ie the locations of the REs to which the different reference signals are mapped are located in the Physical Resource Block (PRB).

A reference signal is transmitted on each of the downstream antenna ports. The CSI-RS can be configured as a 2-port, 4-port or 8-port, and there are 20 2-port CSI-RSs in one PRB (as shown in Figure 1a, one 2-port CSI-RS is mapped to a set of identifiers as 0). ~1 RE on), or 10 groups of 4-port CSI-RS (as shown in Figure 1b, one 4-port CSI-RS is mapped to a set of REs with IDs 0-3), or five 8-port CSIs -RS (As shown in Figure 1c, one 8-port CSI-RS is mapped to a set of REs identified as 0-7). The numbers in the boxes in Figures 1a, 1b and 1c represent the port numbers. Each of the two ports uses code division multiplexing on two adjacent REs. For example, in Figure 1a, a group of two REs identified as 0 to 1 are multiplexed with port 0 and port 1, using (1 1) and ( 1 -1) are multiplexed together. This multiplexing mode is expressed as an orthogonal spreading code OCC=2.

On this basis, the 12-port CSI-RS and the 16-port CSI-RS are introduced in the Rel-13 version. The 12-port CSI-RS and the 16-port CSI-RS are all generated by port aggregation. At the same time, in order to obtain better power utilization, based on the orthogonal spreading code OCC=2 of Rel-10, the method of OCC=4 is introduced. Thus, the 12-port CSI-RS is aggregated by three 4-port CSI-RSs (OCC=2 or OCC=4), as shown in Figure 2a, where the labels are A, B, and C. The three 4-port CSI-RSs form a 12-port CSI-RS; the 16-port CSI-RS is aggregated by two 8-port CSI-RSs (OCC=2 or OCC=4), as shown in Figure 2b, where One 8-port CSI-RS of A and B and one 8-port CSI-RS identified as C and D constitute one 16-port CSI-RS. The same letter parts in Figures 2a and 2b form a packet with OCC=4, each packet adopts Time Division Multiplexing (TDM) combined with Frequency Division Multiplexing (FDM), and 4 ports of CSI-RS are multiplexed in each. 4 groups of 4 REs.

Currently, the LTE system cannot support more CSI-RSs of antenna ports, such as CSI-RS transmissions of more than 16 ports.

Summary of the invention

The embodiments of the present invention provide a reference signal mapping method and device, which are used to implement CSI-RS mapping above 16 ports, thereby implementing CSI-RS transmission over 16 ports.

The specific technical solutions provided by the embodiments of the present invention are as follows:

In a first aspect, an embodiment of the present invention provides a reference signal mapping method, including:

Determining, according to the N-port reference signal pattern, the resource unit RE to which the channel state information reference signal CSI-RS is mapped, N being an integer greater than 16; wherein an N-port CSI-RS in the N-port reference signal pattern is mapped to The RE position is determined according to the RE position to which the CSI-RS is mapped in the plurality of 8-port reference signal patterns, and each of the N ports uses an S of 8 code words of an 8-bit orthogonal spreading code. Multiple codewords are multiplexed, and the 8-port reference signal pattern is an 8-port CSI-RS pattern defined by 3GPP Rel-13;

Resource mapping is performed on the CSI-RS according to the determined RE.

In a possible implementation, the N is equal to 20, 24, 28 or 32.

In a possible implementation manner, when the N is equal to 32, 28, 24 or 20, an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and 4 groups in the 8-port reference signal pattern. The RE locations to which the 8-port CSI-RSs are mapped are the same; wherein, when the N is equal to 32, every 8 ports of the N ports are multiplexed with 8 codewords of an 8-bit orthogonal spreading code, Or, when the N is equal to 28, every 7 ports in the N port are multiplexed with 7 code words of an 8-bit orthogonal spreading code, or, when the N is equal to 24, the N Each of the six ports in the port is multiplexed with six codewords of an 8-bit orthogonal spreading code, or, when the N is equal to 20, each of the five ports uses an 8-bit orthogonal expansion. The five codewords of the frequency code are multiplexed;

or,

When the N is equal to 24, the RE position to which one N-port CSI-RS in the N-port reference signal pattern is mapped is the same as the RE position to which the three 8-port CSI-RSs in the 8-port reference signal pattern are mapped Each of the N ports is multiplexed with 8 code words of an 8-bit orthogonal spreading code.

In a possible implementation manner, in a normal cyclic prefix subframe including 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a normal cyclic prefix subframe The third OFDM symbol of slot 1 in the defined 8-port reference signal pattern and the RE position to which the three groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the 8-port defined in the normal cyclic prefix subframe The RE positions of the sixth OFDM symbol of slot 0 or slot 1 in the reference signal pattern and the RE locations to which the group of 8-port CSI-RSs on the seventh OFDM symbol are mapped are the same.

In a possible implementation manner, in a normal cyclic prefix subframe including 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a normal cyclic prefix subframe The third OFDM symbol of slot 1 in the defined 8-port reference signal pattern and the RE position to which the 2 groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the 8 ports defined in the normal cyclic prefix subframe When the sixth OFDM symbol of slot 0 in the reference signal pattern and the RE position of the group of 8-port CSI-RSs of the seventh OFDM symbol are mapped, and the 8-port reference signal pattern defined in the normal cyclic prefix subframe The RE position of the sixth OFDM symbol of the slot 1 and the RE position to which the one group of 8-port CSI-RSs of the seventh OFDM symbol are mapped is the same.

In a possible implementation manner, when N is equal to 24, and an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and the 3-group 8-port CSI-RS in the 8-port reference signal pattern is mapped to When the RE locations are the same,

In a normal cyclic prefix subframe containing 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE location, and an 8-port reference signal defined in a normal cyclic prefix subframe The third OFDM symbol of slot 1 and the three sets of 8-port CSI-RS of the fourth OFDM symbol, the sixth OFDM symbol of slot 1, and the one set of 8-port CSI-RS of the seventh OFDM symbol The RE position at which the sixth OFDM symbol of slot 0 and any three groups of 8-port CSI-RSs of the seventh OFDM symbol are mapped are the same.

In a possible implementation, in a normal cyclic subframe including 14 OFDM symbols, each group of S port CSI-RSs is on the sixth OFDM symbol and the seventh OFDM symbol of the slot 0 or slot 1. a packet, and a third OFDM symbol of the slot 1 and a packet on the fourth OFDM symbol are multiplexed on 8 REs using an 8-bit orthogonal spreading code;

Wherein the sixth OFDM symbol of the slot 0 or slot 1 and one packet on the seventh OFDM symbol are the sixth OFDM symbol and the seventh OFDM for the slot 0 or slot 1 A group of 8-port CSI-RSs on a symbol is divided into four packets of two packets occupying two REs according to subcarriers;

The third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are three groups of 8-port CSI-RSs on the third OFDM symbol of the slot 1 and the fourth OFDM symbol. Divided into 4 according to subcarriers One of the packets occupying 6 REs respectively.

In a possible implementation, in a normal cyclic subframe including 14 OFDM symbols, each group of S port CSI-RSs is a packet on a sixth OFDM symbol and a seventh OFDM symbol of the slot 0, And a sixth OFDM symbol of the slot 1 and a packet on the seventh OFDM symbol, and a third OFDM symbol of the slot 1 and a packet of the fourth OFDM symbol, using 8-bit orthogonal expansion The frequency code is multiplexed on 8 REs;

The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are a sixth OFDM symbol of the slot 0 and a group of 8-port CSI on the seventh OFDM symbol. -RS is divided into four packets of two packets occupying two REs respectively according to subcarriers;

The sixth OFDM symbol of the slot 1 and one packet on the seventh OFDM symbol are a set of 8-port CSI-RSs on the sixth OFDM symbol of the slot 1 and the seventh OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

The third OFDM symbol of the slot 1 and one packet of the fourth OFDM symbol are in accordance with the third OFDM symbol of the slot 1 and the two groups of 8-port CSI-RSs on the fourth OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.

In a possible implementation, in a DwPTS including 11 or 12 OFDM symbols, an N-port reference signal pattern is mapped to an RE position of an N-port CSI-RS, and an 8-port reference defined in the DwPTS The position of the RE of the sixth OFDM symbol of slot 0 and the three sets of 8-port CSI-RSs on the seventh OFDM symbol to which the signal is mapped, and the slot 0 of the 8-port reference signal pattern defined in the DwPTS The RE position of the third OFDM symbol of slot 1 and the RE position to which one group of 8-port CSI-RSs on the fourth OFDM symbol are mapped is the same.

In a possible implementation, in a DwPTS including 11 or 12 OFDM symbols, an N-port reference signal pattern is mapped to an RE position of an N-port CSI-RS, and an 8-port reference defined in the DwPTS The sixth OFDM symbol of slot 0 in the signal pattern and the RE position to which the two sets of 8-port CSI-RSs on the seventh OFDM symbol are mapped, and the slot 0 of the 8-port reference signal pattern defined in the DwPTS The third OFDM symbol and the RE position of the group of 8-port CSI-RSs of the fourth OFDM symbol are mapped, and the third OFDM symbol and the fourth OFDM of slot 1 in the 8-port reference signal pattern defined in the DwPTS The RE positions formed by the RE positions to which the set of 8-port CSI-RSs of the symbol are mapped are the same.

In a possible implementation manner, when N is equal to 24, and an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and the 3-group 8-port CSI-RS in the 8-port reference signal pattern is mapped to When the RE locations are the same,

In a DwPTS including 11 or 12 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a slot 0 in an 8-port reference signal pattern defined in the DwPTS The sixth OFDM symbol and the third set of 8-port CSI-RS of the seventh OFDM symbol, the third OFDM symbol of slot 0, and the first set of 8-port CSI-RS of the fourth OFDM symbol and the first of slot 1 The RE positions at which any three groups of 8-port CSI-RSs of the three OFDM symbols and the fourth group of 8-port CSI-RSs of the fourth OFDM symbol are mapped are the same.

In a possible implementation, in a DwPTS including 11 or 12 OFDM symbols, each group of S port CSI-RSs is on the third OFDM symbol and the fourth OFDM symbol of the slot 0 or slot 1. a packet, and a sixth OFDM symbol of the slot 0 and a packet on the seventh OFDM symbol are multiplexed on 8 REs using an 8-bit orthogonal spreading code;

The third OFDM symbol of the slot 0 or slot 1 and the last packet of the fourth OFDM symbol are the third OFDM symbol and the fourth OFDM symbol for the slot 0 or slot 1. The upper group of 8-port CSI-RSs is divided into four packets of two groups respectively occupying 2 REs according to subcarriers;

The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are three groups of 8-port CSI-RSs on the sixth OFDM symbol of the slot 0 and the seventh OFDM symbol. According to the subcarrier, the packet is divided into four packets each occupying 6 REs.

In a possible implementation, in a DwPTS comprising 11 or 12 OFDM symbols, each group of S-port CSI-RSs is in a packet on a third OFDM symbol and a fourth OFDM symbol of the slot 0, And a third OFDM symbol of the slot 1 and a packet on the fourth OFDM symbol, and a packet of the sixth OFDM symbol and the seventh OFDM symbol of the slot 0, using 8-bit orthogonal expansion The frequency code is multiplexed on 8 REs;

Wherein the third OFDM symbol of the slot 0 and one packet on the fourth OFDM symbol are a group of 8-port CSIs on the third OFDM symbol of the slot 0 and the fourth OFDM symbol. -RS is divided into four packets of two packets occupying two REs respectively according to subcarriers;

The third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are a group of 8-port CSI-RSs on the third OFDM symbol of the slot 1 and the fourth OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

The sixth OFDM symbol of the slot 0 and one packet of the seventh OFDM symbol are in accordance with the sixth OFDM symbol of the slot 0 and the two groups of 8-port CSI-RS on the seventh OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.

In a second aspect, an embodiment of the present invention provides a reference signal mapping apparatus, including:

a processing module, configured to determine, according to the N port reference signal pattern, a channel state information reference signal CSI-RS is mapped The resource unit RE, N is an integer greater than 16; wherein the RE position to which an N-port CSI-RS is mapped in the N-port reference signal pattern is according to the CSI-RS in the multi-group 8-port reference signal pattern Determined by the mapped RE location, each S port of the N port is multiplexed with S codewords of 8 code words of an 8-bit orthogonal spreading code, and the 8-port reference signal pattern is 3GPP Rel 8-port CSI-RS pattern defined by -13;

And a mapping module, configured to perform resource mapping on the CSI-RS according to the RE determined by the processing module.

In a possible implementation, the N is equal to 20, 24, 28 or 32.

In a possible implementation manner, when the N is equal to 32, 28, 24 or 20, an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and 4 groups in the 8-port reference signal pattern. The RE locations to which the 8-port CSI-RSs are mapped are the same; wherein, when the N is equal to 32, every 8 ports of the N ports are multiplexed with 8 codewords of an 8-bit orthogonal spreading code, Or, when the N is equal to 28, every 7 ports in the N port are multiplexed with 7 code words of an 8-bit orthogonal spreading code, or, when the N is equal to 24, the N Each of the six ports in the port is multiplexed with six codewords of an 8-bit orthogonal spreading code, or, when the N is equal to 20, each of the five ports uses an 8-bit orthogonal expansion. The five codewords of the frequency code are multiplexed;

or,

When the N is equal to 24, the RE position to which one N-port CSI-RS in the N-port reference signal pattern is mapped is the same as the RE position to which the three 8-port CSI-RSs in the 8-port reference signal pattern are mapped Each of the N ports is multiplexed with 8 code words of an 8-bit orthogonal spreading code.

In a possible implementation manner, in a normal cyclic prefix subframe including 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a normal cyclic prefix subframe The third OFDM symbol of slot 1 in the defined 8-port reference signal pattern and the RE position to which the three groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the 8-port defined in the normal cyclic prefix subframe The RE positions of the sixth OFDM symbol of slot 0 or slot 1 in the reference signal pattern and the RE locations to which the group of 8-port CSI-RSs on the seventh OFDM symbol are mapped are the same.

In a possible implementation manner, in a normal cyclic prefix subframe including 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a normal cyclic prefix subframe The third OFDM symbol of slot 1 in the defined 8-port reference signal pattern and the RE position to which the 2 groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the 8 ports defined in the normal cyclic prefix subframe When the sixth OFDM symbol of slot 0 in the reference signal pattern and the RE position of the group of 8-port CSI-RSs of the seventh OFDM symbol are mapped, and the 8-port reference signal pattern defined in the normal cyclic prefix subframe The RE position of the sixth OFDM symbol of the slot 1 and the RE position to which the one group of 8-port CSI-RSs of the seventh OFDM symbol are mapped is the same.

In a possible implementation, when N is equal to 24, and one N-port CSI-RS in the N-port reference signal pattern When the RE position to be mapped is the same as the RE position to which the three 8-port CSI-RSs in the 8-port reference signal pattern are mapped,

In a normal cyclic prefix subframe containing 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE location, and an 8-port reference signal defined in a normal cyclic prefix subframe The third OFDM symbol of slot 1 and the three sets of 8-port CSI-RS of the fourth OFDM symbol, the sixth OFDM symbol of slot 1, and the one set of 8-port CSI-RS of the seventh OFDM symbol The RE position at which the sixth OFDM symbol of slot 0 and any three groups of 8-port CSI-RSs of the seventh OFDM symbol are mapped are the same.

In a possible implementation, in a normal cyclic subframe including 14 OFDM symbols, each group of S port CSI-RSs is on the sixth OFDM symbol and the seventh OFDM symbol of the slot 0 or slot 1. a packet, and a third OFDM symbol of the slot 1 and a packet on the fourth OFDM symbol are multiplexed on 8 REs using an 8-bit orthogonal spreading code;

Wherein the sixth OFDM symbol of the slot 0 or slot 1 and one packet on the seventh OFDM symbol are the sixth OFDM symbol and the seventh OFDM for the slot 0 or slot 1 A group of 8-port CSI-RSs on a symbol is divided into four packets of two packets occupying two REs according to subcarriers;

The third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are three groups of 8-port CSI-RSs on the third OFDM symbol of the slot 1 and the fourth OFDM symbol. According to the subcarrier, the packet is divided into four packets each occupying 6 REs.

In a possible implementation, in a normal cyclic subframe including 14 OFDM symbols, each group of S port CSI-RSs is a packet on a sixth OFDM symbol and a seventh OFDM symbol of the slot 0, And a sixth OFDM symbol of the slot 1 and a packet on the seventh OFDM symbol, and a third OFDM symbol of the slot 1 and a packet of the fourth OFDM symbol, using 8-bit orthogonal expansion The frequency code is multiplexed on 8 REs;

The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are a sixth OFDM symbol of the slot 0 and a group of 8-port CSI on the seventh OFDM symbol. -RS is divided into four packets of two packets occupying two REs respectively according to subcarriers;

The sixth OFDM symbol of the slot 1 and one packet on the seventh OFDM symbol are a set of 8-port CSI-RSs on the sixth OFDM symbol of the slot 1 and the seventh OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

The third OFDM symbol of the slot 1 and one packet of the fourth OFDM symbol are in accordance with the third OFDM symbol of the slot 1 and the two groups of 8-port CSI-RSs on the fourth OFDM symbol. Subcarrier equalization is divided into 4 One of the packets occupying 4 REs respectively.

In a possible implementation, in a DwPTS including 11 or 12 OFDM symbols, an N-port reference signal pattern is mapped to an RE position of an N-port CSI-RS, and an 8-port reference defined in the DwPTS The position of the RE of the sixth OFDM symbol of slot 0 and the three sets of 8-port CSI-RSs on the seventh OFDM symbol to which the signal is mapped, and the slot 0 of the 8-port reference signal pattern defined in the DwPTS The RE position of the third OFDM symbol of slot 1 and the RE position to which one group of 8-port CSI-RSs on the fourth OFDM symbol are mapped is the same.

In a possible implementation, in a DwPTS including 11 or 12 OFDM symbols, an N-port reference signal pattern is mapped to an RE position of an N-port CSI-RS, and an 8-port reference defined in the DwPTS The sixth OFDM symbol of slot 0 in the signal pattern and the RE position to which the two sets of 8-port CSI-RSs on the seventh OFDM symbol are mapped, and the slot 0 of the 8-port reference signal pattern defined in the DwPTS The third OFDM symbol and the RE position of the group of 8-port CSI-RSs of the fourth OFDM symbol are mapped, and the third OFDM symbol and the fourth OFDM of slot 1 in the 8-port reference signal pattern defined in the DwPTS The RE positions formed by the RE positions to which the set of 8-port CSI-RSs of the symbol are mapped are the same.

In a possible implementation manner, when N is equal to 24, and an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and the 3-group 8-port CSI-RS in the 8-port reference signal pattern is mapped to When the RE locations are the same,

In a DwPTS including 11 or 12 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a slot 0 in an 8-port reference signal pattern defined in the DwPTS The sixth OFDM symbol and the third set of 8-port CSI-RS of the seventh OFDM symbol, the third OFDM symbol of slot 0, and the first set of 8-port CSI-RS of the fourth OFDM symbol and the first of slot 1 The RE positions at which any three groups of 8-port CSI-RSs of the three OFDM symbols and the fourth group of 8-port CSI-RSs of the fourth OFDM symbol are mapped are the same.

In a possible implementation, in a DwPTS including 11 or 12 OFDM symbols, each group of S port CSI-RSs is on the third OFDM symbol and the fourth OFDM symbol of the slot 0 or slot 1. a packet, and a sixth OFDM symbol of the slot 0 and a packet on the seventh OFDM symbol are multiplexed on 8 REs using an 8-bit orthogonal spreading code;

The third OFDM symbol of the slot 0 or slot 1 and the last packet of the fourth OFDM symbol are the third OFDM symbol and the fourth OFDM symbol for the slot 0 or slot 1. The upper group of 8-port CSI-RSs is divided into four packets of two groups respectively occupying 2 REs according to subcarriers;

The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are three groups of 8-port CSI-RSs on the sixth OFDM symbol of the slot 0 and the seventh OFDM symbol. Divided into 4 according to subcarriers One of the packets occupying 6 REs respectively.

In a possible implementation, in a DwPTS comprising 11 or 12 OFDM symbols, each group of S-port CSI-RSs is in a packet on a third OFDM symbol and a fourth OFDM symbol of the slot 0, And a third OFDM symbol of the slot 1 and a packet on the fourth OFDM symbol, and a packet of the sixth OFDM symbol and the seventh OFDM symbol of the slot 0, using 8-bit orthogonal expansion The frequency code is multiplexed on 8 REs;

Wherein the third OFDM symbol of the slot 0 and one packet on the fourth OFDM symbol are a group of 8-port CSIs on the third OFDM symbol of the slot 0 and the fourth OFDM symbol. -RS is divided into four packets of two packets occupying two REs respectively according to subcarriers;

The third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are a group of 8-port CSI-RSs on the third OFDM symbol of the slot 1 and the fourth OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

The sixth OFDM symbol of the slot 0 and one packet of the seventh OFDM symbol are in accordance with the sixth OFDM symbol of the slot 0 and the two groups of 8-port CSI-RS on the seventh OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.

In a third aspect, an embodiment of the present invention provides a base station, including: a processor, a memory, a transceiver, and a bus interface;

The processor is configured to read a program in the memory and perform the following process:

Determining, according to the N-port reference signal pattern, the resource unit RE to which the channel state information reference signal CSI-RS is mapped, N being an integer greater than 16; wherein an N-port CSI-RS in the N-port reference signal pattern is mapped to The RE position is determined according to the RE position to which the CSI-RS is mapped in the plurality of 8-port reference signal patterns, and each of the N ports uses an S of 8 code words of an 8-bit orthogonal spreading code. Multiple codewords are multiplexed, and the 8-port reference signal pattern is an 8-port CSI-RS pattern defined by 3GPP Rel-13;

Resource mapping is performed on the CSI-RS according to the determined RE.

In the foregoing embodiment of the present invention, the reference signal pattern of the N port is obtained according to the 8-port CSI-RS pattern defined by 3GPP Rel-13, and when the reference signal mapping is performed, the CSI is determined according to the reference signal pattern of the N port. The RE location to which the RS is mapped, and resource mapping of the CSI-RS according to the RE location. Since N is an integer greater than 16, the CSI-RS mapping of 16 ports or more is realized, and the transmission of CSI-RS of 16 ports or more is realized.

DRAWINGS

1a, 1b, and 1c are respectively a 2-port, 4-port, and 8-port reference signal pattern in the prior art;

2a and 2b are respectively 12-port and 16-port reference signal patterns in the existing LTE Rel-13;

3 is a schematic flowchart of a detailed method for reference signal mapping in an embodiment of the present invention;

4 is a schematic diagram of a 32-port reference signal pattern according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another 32-port reference signal according to an embodiment of the present invention; FIG.

6 is a schematic diagram of another 32-port reference signal pattern according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of another 24-port reference signal pattern according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic structural diagram of a reference signal mapping apparatus according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division. Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) System, Universal Mobile Telecommunication System (UMTS), etc.

It should be understood that, in the embodiment of the present invention, the user equipment (User Equipment, UE) includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular" The telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.

In an embodiment of the invention, a base station (e.g., an access point) may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited set.

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Currently, the LTE standard supports 1, 2, 4, 8, 12, and 16 port CSI-RS transmissions, and does not support CSI-RS transmission of more than 16 ports such as 20, 24, 28, or 32 ports. In response to this problem, embodiments of the present invention provide a reference signal mapping method and apparatus capable of supporting 16-port or more CSI-RS transmissions such as 20, 24, 28, or 32 ports.

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

A reference signal is transmitted on each of the downstream antenna ports. An antenna port is a logical port used for transmission, which can correspond to one or more actual physical antennas. The definition of the antenna port is defined from the perspective of the receiver, that is, if the receiver needs to distinguish the spatial difference of resources, it is necessary to define multiple antenna ports. For the terminal, the reference signal corresponding to an antenna port received by the terminal defines a corresponding antenna port, although the reference signal may be a composite of signals transmitted by multiple physical antennas.

In the embodiment of the present invention, a detailed method flow of reference signal mapping is shown in FIG. 3, and the flow may be performed by a base station, as follows:

Step 301: Determine, according to the N-port reference signal pattern, a resource unit RE to which the channel state information reference signal CSI-RS is mapped, where N is an integer greater than 16, wherein an N-port CSI-RS in the N-port reference signal pattern The RE position to be mapped is determined according to the RE position to which the CSI-RS is mapped in the multi-group 8-port reference signal pattern, and each of the N ports uses 8 code words of an 8-bit orthogonal spreading code. S codewords are multiplexed, and the 8-port reference signal pattern is an 8-port CSI-RS pattern defined by 3GPP Rel-13;

Step 302: Perform resource mapping on the CSI-RS according to the determined RE.

Specifically, N is equal to 20, 24, 28 or 32.

Through the above procedure, when the number of base station antenna ports is N, the base station can configure the terminal N-port CSI-RS. The terminal measures the channel on the configured CSI-RS port and feeds back the channel information.

According to the 8-port CSI-RS pattern defined by 3GPP Rel-13, a reference signal pattern of the N port (N=20, 24, 28 or 32) is obtained, and when the reference signal is mapped, it is determined according to the reference signal pattern of the N port. The RE location to which the CSI-RS is mapped is used to perform resource mapping on the CSI-RS according to the RE location, thereby implementing CSI-RS mapping of the N port, thereby implementing transmission of the N-port CSI-RS.

The following takes an example where N is equal to 20, 24, 28 or 32. According to the above procedure, the 8-port CSI-RS pattern defined by the 3GPP Rel-13 is used to determine the RE location to which the N-port CSI-RS is mapped, which may include the following Situation:

Case 1, for the 32-port, the RE position to which one 32-port CSI-RS in the 32-port reference signal pattern is mapped is the same as the RE position to which the 4-group 8-port CSI-RS in the 8-port reference signal pattern is mapped. 32 port Each of the 8 ports is multiplexed with 8 code words of an 8-bit orthogonal spreading code.

Case 2, for one of the 28-port, 28-port reference signal patterns, the RE position to which the 28-port CSI-RS is mapped is the same as the RE position to which the 4-group 8-port CSI-RS in the 8-port reference signal pattern is mapped . Each of the 28 ports is multiplexed with 7 code words of an 8-bit orthogonal spreading code.

Case 3, for one of the 24-port, 24-port reference signal patterns, the RE position to which the 24-port CSI-RS is mapped is the same as the RE position to which the four 8-port CSI-RSs in the 8-port reference signal pattern are mapped . Each of the 24 ports is multiplexed with 6 code words of an 8-bit orthogonal spreading code.

Case 4, for one of the 20-port, 20-port reference signal patterns, the RE position to which the 20-port CSI-RS is mapped is the same as the RE position to which the 4-group 8-port CSI-RS in the 8-port reference signal pattern is mapped . Each of the 20 ports is multiplexed with 5 code words of an 8-bit orthogonal spreading code.

Case 5, for 24 o'clock, the RE position to which a 24-port CSI-RS in the 24-port reference signal pattern is mapped is the same as the RE position to which the 3 groups of 8-port CSI-RSs in the 8-port reference signal pattern are mapped, Each of the 24 ports is multiplexed with 8 code words of an 8-bit orthogonal spreading code.

For the above cases 1 to 4, according to the number of symbols included in one subframe, in the 8-port reference signal pattern, the symbol position of the RE to which the CSI-RS is mapped is also different, and specifically includes the following cases:

Case a, in a normal cyclic prefix subframe including 14 orthogonal frequency division multiplexing (OFDM) symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to RE position, the third OFDM symbol of slot 1 in the 8-port reference signal pattern defined in the normal cyclic prefix subframe and the RE locations to which the 3 groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and The sixth OFDM symbol of slot 0 or slot 1 in the 8-port reference signal pattern defined in the normal cyclic prefix subframe and the RE location to which the group of 8-port CSI-RSs on the seventh OFDM symbol are mapped are common The RE positions are the same.

In case a, in a normal cyclic subframe comprising 14 OFDM symbols, each group of S-port CSI-RSs is on the sixth OFDM symbol and the seventh OFDM symbol of the slot 0 or slot 1 And on the third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol, multiplexed on 8 REs using an 8-bit orthogonal spreading code.

In case a, the sixth OFDM symbol of the slot 0 or slot 1 and one packet on the seventh OFDM symbol are the sixth OFDM symbol and the slot 0 or slot 1 A group of 8-port CSI-RSs on the seventh OFDM symbol are equally divided into four packets of two REs respectively occupying 2 REs according to subcarriers; a third OFDM symbol and a fourth OFDM of the slot 1 a packet on the symbol, which is divided into four packets occupying 6 REs according to subcarriers for the third OFDM symbol of the slot 1 and the three groups of 8-port CSI-RSs of the fourth OFDM symbol. a grouping.

In case a, when N is 32, S is equal to 8; when N is 28, S is equal to 7; when N is 24, S is equal to 6; when N is 20, S is equal to 5.

Case b, in a normal cyclic prefix subframe containing 14 OFDM symbols, an RE position to which an N-port CSI-RS in the N-port reference signal pattern is mapped, and 8 defined in a normal cyclic prefix subframe The third OFDM symbol of slot 1 in the port reference signal pattern and the RE position to which the two groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the 8-port reference signal pattern defined in the normal cyclic prefix sub-frame The RE position of the sixth OFDM symbol of the slot 0 and the group of 8-port CSI-RS of the seventh OFDM symbol are mapped, and the slot 1 of the 8-port reference signal pattern defined in the normal cyclic prefix subframe The RE positions of the sixth OFDM symbol and the RE position to which the one set of 8-port CSI-RSs of the seventh OFDM symbol are mapped are the same.

In case b in a normal cyclic subframe comprising 14 OFDM symbols, a group of S-port CSI-RSs on a sixth OFDM symbol and a seventh OFDM symbol of the slot 0, and the A sixth OFDM symbol of slot 1 and a packet on a seventh OFDM symbol, and a third OFDM symbol of slot 1 and a packet of a fourth OFDM symbol, using an 8-bit orthogonal spreading code Multiple reuse on 8 REs.

In case b, the sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are a sixth OFDM symbol for the slot 0 and a group 8 for the seventh OFDM symbol. The port CSI-RS is divided into four packets of two groups each occupying 2 REs according to subcarriers;

The sixth OFDM symbol of the slot 1 and one packet on the seventh OFDM symbol are a set of 8-port CSI-RSs on the sixth OFDM symbol of the slot 1 and the seventh OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

The third OFDM symbol of the slot 1 and one packet of the fourth OFDM symbol are in accordance with the third OFDM symbol of the slot 1 and the two groups of 8-port CSI-RSs on the fourth OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.

In case b, when N is 32, S is equal to 8; when N is 28, S is equal to 7; when N is 24, S is equal to 6; when N is 20, S is equal to 5.

Case c, in a Downlink Pilot Time Slot (DwPTS) containing 11 or 12 OFDM symbols, an RE position to which an N-port CSI-RS in the N-port reference signal pattern is mapped , the location of the RE of the sixth OFDM symbol of slot 0 in the 8-port reference signal pattern defined in the DwPTS and the 3-group 8-port CSI-RS on the seventh OFDM symbol, and the 8 defined in the DwPTS The RE position of the third OFDM symbol of slot 0 or slot 1 in the port reference signal pattern and the RE position to which the group of 8-port CSI-RSs on the fourth OFDM symbol are mapped are the same.

In case c, in a DwPTS comprising 11 or 12 OFDM symbols, each group of S-port CSI-RSs is on the third OFDM symbol and the fourth OFDM symbol of the slot 0 or slot 1 And a sixth OFDM symbol of the slot 0 and a packet on the seventh OFDM symbol are multiplexed on 8 REs using an 8-bit orthogonal spreading code.

In case c, the third OFDM symbol of the time slot 0 or time slot 1 and the first OFDM symbol of the fourth OFDM symbol The group is divided into four groups occupying 2 REs according to subcarriers for the third OFDM symbol of the slot 0 or slot 1 and the group of 8-port CSI-RSs of the fourth OFDM symbol. a grouping;

The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are three groups of 8-port CSI-RSs on the sixth OFDM symbol of the slot 0 and the seventh OFDM symbol. According to the subcarrier, the packet is divided into four packets each occupying 6 REs.

In case c, when N is 32, S is equal to 8; when N is 28, S is equal to 7; when N is 24, S is equal to 6; when N is 20, S is equal to 5.

Case d, in a DwPTS including 11 or 12 OFDM symbols, an RE position to which an N-port CSI-RS in the N-port reference signal pattern is mapped, and an 8-port reference signal pattern defined in the DwPTS The sixth OFDM symbol of slot 0 and the RE position to which the two groups of 8-port CSI-RSs on the seventh OFDM symbol are mapped, and the third OFDM of slot 0 in the 8-port reference signal pattern defined in the DwPTS a symbol and an RE position to which a group of 8-port CSI-RSs of the fourth OFDM symbol are mapped, and a third OFDM symbol of the slot 1 and a fourth OFDM symbol of the 8-port reference signal pattern defined in the DwPTS The RE locations formed by the RE locations to which the group 8-port CSI-RSs are mapped are the same.

In case d, in a DwPTS comprising 11 or 12 OFDM symbols, a group of S-port CSI-RSs on the third OFDM symbol and the fourth OFDM symbol of the slot 0, and The third OFDM symbol of slot 1 and one packet on the fourth OFDM symbol, and one packet of the sixth OFDM symbol and the seventh OFDM symbol of slot 0, using an 8-bit orthogonal spreading code Multiplexing on 8 REs.

In case d, the third OFDM symbol of the slot 0 and one packet on the fourth OFDM symbol are a third OFDM symbol for the slot 0 and a group 8 for the fourth OFDM symbol. The port CSI-RS is divided into four ones of the packets occupying 2 REs respectively according to the subcarriers; the third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are The third OFDM symbol of slot 1 and the one group of 8-port CSI-RSs on the fourth OFDM symbol are equally divided into one of four packets occupying 2 REs respectively according to subcarriers;

The sixth OFDM symbol of the slot 0 and one packet of the seventh OFDM symbol are in accordance with the sixth OFDM symbol of the slot 0 and the two groups of 8-port CSI-RS on the seventh OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.

In case d, when N is 32, S is equal to 8; when N is 28, S is equal to 7; when N is 24, S is equal to 6; when N is 20, S is equal to 5.

For the above case 5, according to the number of symbols included in one subframe, the symbol position of the RE to which the CSI-RS is mapped in the 8-port reference signal pattern includes the following cases:

Case e, in a normal cyclic prefix subframe containing 14 OFDM symbols, an RE position to which an N-port CSI-RS in the N-port reference signal pattern is mapped, and 8 defined in a normal cyclic prefix subframe The third OFDM symbol of slot 1 and the three groups of 8-port CSI-RS of the fourth OFDM symbol in the port reference signal pattern, Any of a sixth OFDM symbol of slot 1 and a group of 8-port CSI-RSs of a seventh OFDM symbol and a sixth OFDM symbol of slot 0 and a group of 8-port CSI-RSs of a seventh OFDM symbol The three groups of 8-port CSI-RSs are mapped to the same RE location. Where N is 24.

Case f, in a DwPTS including 11 or 12 OFDM symbols, an RE position to which an N-port CSI-RS in the N-port reference signal pattern is mapped, and an 8-port reference signal pattern defined in the DwPTS 6th OFDM symbol of slot 0 and 3 sets of 8-port CSI-RS of seventh OFDM symbol, third OFDM symbol of slot 0, and 1 set of 8-port CSI-RS and slot of fourth OFDM symbol The third OFDM symbol of 1 and the RE position of any three groups of 8-port CSI-RSs of the first group of 8-port CSI-RSs of the fourth OFDM symbol are mapped to the same. Where N is 24.

For the 32-port CSI-RS, if the port with OCC=2 in Figure 1a, Figure 1b or Figure 1c is used for aggregation, for example, 16 groups of 2-port CSI-RS aggregation, 8 groups of 4-port CSI-RS aggregation, or 4 groups are used. For 8-port CSI-RS aggregation, the power of each port cannot be fully utilized, resulting in the pilot power being only one-fourth of the data power. If the port with OCC=4 in Figure 2a and Figure 2b is used for aggregation, If 8 groups of 4-port aggregation or 4 groups of 8-port aggregation are used, the pilot power in OFDM symbol 5, OFDM symbol 6 and OFDM symbol 2, OFDM symbol 3 may be inconsistent (OFDM symbol 5, pilot frequency of OFDM symbol 6) It is one quarter of the data power, and the pilot power of OFDM symbol 2 and OFDM symbol 3 is one-half of the data power). This will affect the coverage of the pilot. Similarly, the same pilot power inconsistency problem exists for 18, 20, 24 or 28 port pilots. On the basis of the embodiment of the present invention, the 8-bit orthogonal spreading code (ie, OCC=8) is used for aggregation, and the equal power transmission of the CSI-RS is implemented without adding additional pilot resources and without reducing the pilot density. The full power utilization of the pilot is achieved when extended to OCC=8.

The following describes a 32-port CSI-RS and a 24-port CSI-RS CSI-RS as examples.

(1) 32-port reference signal pattern

In the 32-port reference signal pattern, the 32 RE locations to which a group of 32-port CSI-RSs are mapped are the same as the positions of 32 REs to which the four 8-port CSI-RSs in the 8-port reference signal pattern are mapped, and Each group of 8-port CSI-RSs is multiplexed on 8 REs using 8-bit orthogonal spreading codes.

Figure 4 exemplarily shows a 32 port reference signal pattern in which each square represents an RE. In the RE to which the 32-port CSI-RS is mapped, the square corresponding to each RE is identified by a letter. The 32-port reference signal pattern shown in FIG. 4 includes four groups of 8-port CSI-RSs, and the REs to which the four groups of 8-port CSI-RSs are mapped are respectively identified as A to D.

Specifically, the four groups of 8-port CSI-RSs shown in FIG. 4 include OFDM symbol 2 in slot 1 and three groups of 8-port CSI-RSs on OFDM symbol 3, and slot 0 (or slot 1) OFDM symbol 5 and a set of 8-port CSI-RS on OFDM symbol 6. When OCC=8 multiplexing is performed, OFDM symbol 5 in slot 0 or slot 1 and 1 group 8-port CSI-RS on OFDM symbol 6 are divided into 4 packets by subcarrier (each packet occupies 2 REs) ), simultaneously OFDM symbol 2 in slot 1 and 3 groups of 8-port CSI-RS on OFDM symbol 3 by subcarrier Divided into 4 packets (6 REs per packet). Thus, one OCC=8 packet is formed by combining OFDM symbol 5 of slot 0 or slot 1 and one packet on OFDM symbol 6 with one packet on OFDM symbol 2 and OFDM symbol 3 of slot 1. The same letter portion indicates a packet with an OCC=8. Each 8-port CSIRS is code-multiplexed on 8 REs of an OCC=8 packet, using an orthogonal spreading code of length 8.

FIG. 5 exemplarily shows another 32-port reference signal pattern. Each of these squares represents an RE. In the RE to which the 32-port CSI-RS is mapped, the square corresponding to each RE is identified by a letter. The 32-port reference signal pattern shown in FIG. 4 includes four groups of 8-port CSI-RSs, and the REs mapped to the four groups of 8-port CSI-RSs are respectively identified as A to D, and the REs and 8-port references identified as A The RE positions mapped to a group of 8-port CSI-RSs in the signal pattern are the same. Similarly, the REs identified as B, C, and D are mapped to a group of 8-port CSI-RSs in the 8-port reference signal pattern, respectively. The RE location is the same.

Specifically, the four groups of 8-port CSI-RSs shown in FIG. 5 include OFDM symbol 2 in slot 1 and two groups of 8-port CSI-RSs on OFDM symbol 3, OFDM symbol 5 and OFDM symbols in slot 0. 1 set of 8-port CSI-RSs on 6 and OFDM symbols 5 in slot 1 and 1 set of 8-port CSI-RSs on OFDM symbols 6. When OCC=8 multiplexing is performed, OFDM symbol 5 in slot 0 and slot 1 and a group of 8-port CSI-RS on OFDM symbol 6 are divided into four groups by subcarrier (two REs per packet) At the same time, OFDM symbol 2 in slot 1 and 2 groups of 8-port CSI-RSs on OFDM symbol 3 are divided into 4 packets (4 REs per packet) by subcarrier. Thus, one OCC=8 packet consists of OFDM symbol 5 of slot 0 and one packet on OFDM symbol 6, OFDM symbol 5 of slot 1 and one packet on OFDM symbol 6, and OFDM symbol 2 and OFDM symbol of slot 1. A grouping on 3 is combined. The same letter portion indicates a packet with an OCC=8. Each 8-port CSIRS is code-multiplexed on 8 REs of an OCC=8 packet, using an orthogonal spreading code of length 8.

It should be noted that FIG. 4 and FIG. 5 respectively show only one possible 32-port reference signal pattern. Based on the distribution rule of the foregoing 32-port reference signal pattern, other 32-port reference signal patterns can also be obtained, and List one by one.

In the embodiment of the present invention, the 32-port reference signal pattern in the DwPTS region of the TDD subframe may also be obtained based on the same principle, except that the time shift is only used. Figure 6 shows an example of a 32-port reference signal pattern in the DwPTS region of a TDD subframe.

The CSI-RS corresponding to the same letter in FIGS. 4 to 6 constitutes a packet having an OCC=8, and is multiplexed using a set of 8-bit orthogonal spreading codes. For example, it can be multiplexed according to the method shown in Table 1.

Table 1

(2) 24-port reference signal pattern

In the 24-port reference signal pattern, the 24 RE locations to which a group of 24-port CSI-RSs are mapped are the same as the positions of the 24 REs to which the three 8-port CSI-RSs in the 8-port reference signal pattern are mapped.

A group of 8-port CSI-RSs may be included in one PRB. In the embodiment of the present invention, three groups of 8-port CSI-RSs may be configured to form a 24-port CSI-RS.

Figure 7 exemplarily shows a 24-port reference signal pattern. Each of these squares represents an RE. In the RE to which the 24-port CSI-RS is mapped, the square corresponding to each RE is identified by a letter. The 24-port reference signal pattern shown in FIG. 7 includes three groups of 8-port CSI-RSs, and the REs mapped to the three groups of 8-port CSI-RSs are respectively identified as A to C, and the REs and 8-port references identified as A The RE positions mapped to a group of 8-port CSI-RSs in the signal pattern are the same. Similarly, the REs identified as B and C are mapped to a group of 8-port CSI-RSs in the 8-port reference signal pattern, respectively. The RE position is the same.

Specifically, the three groups of 8-port CSI-RSs shown in FIG. 7 include OFDM symbol 2 of slot 1 and three groups of 8-port CSI-RSs on OFDM symbol 3. The same letter portion indicates a packet with an OCC=8. Each of the 8 CSI-RS ports performs code division multiplexing on 8 REs of one OCC=8 packet, using an orthogonal spreading code of length 8.

It should be noted that for the 28-port, 24-port, and 20-port reference signal patterns, the same aggregation mode as the 32-port reference signal pattern and the same OCC=8 packet configuration method can be used, the difference is: for 28 ports, each 7 CSI-RS ports are code-multiplexed on 8 REs of an OCC=8 packet, using an orthogonal spreading code of length 8; for 24 ports, one OCC=8 for every 6 CSI-RS ports Code division multiplexing is performed on 8 REs of the packet, and orthogonal spreading code of length 8 is used; for 20 ports, code division multiplexing is performed on 8 REs of each CIC-RS port of one OCC=8 packet An orthogonal spreading code of length 8 is used.

Based on the same inventive concept, the embodiment of the present invention provides a reference signal mapping device. For the specific implementation of the device, refer to the description of the method, and the repeated description is not repeated. As shown in FIG. 8, the device mainly includes:

The processing module 801 is configured to determine, according to the N port reference signal pattern, the resource unit RE to which the channel state information reference signal CSI-RS is mapped, where N is an integer greater than 16, wherein an N port in the N port reference signal pattern The RE location to which the CSI-RS is mapped is determined according to the RE location to which the CSI-RS is mapped in the multiple sets of 8-port reference signal patterns, and each of the N ports uses an 8-bit orthogonal spreading code of 8 S codewords in the codewords are multiplexed, and the 8-port reference signal pattern is an 8-port CSI-RS pattern defined by 3GPP Rel-13;

The mapping module 802 is configured to perform resource mapping on the CSI-RS according to the RE determined by the processing module.

In a possible implementation, the N is equal to 20, 24, 28 or 32.

In a possible implementation manner, when the N is equal to 32, 28, 24 or 20, an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and 4 groups in the 8-port reference signal pattern. The RE locations to which the 8-port CSI-RSs are mapped are the same; wherein, when the N is equal to 32, every 8 ports of the N ports are multiplexed with 8 codewords of an 8-bit orthogonal spreading code, Or, when the N is equal to 28, every 7 ports in the N port are multiplexed with 7 code words of an 8-bit orthogonal spreading code, or, when the N is equal to 24, the N Each of the six ports in the port is multiplexed with six codewords of an 8-bit orthogonal spreading code, or, when the N is equal to 20, each of the five ports uses an 8-bit orthogonal expansion. The five codewords of the frequency code are multiplexed;

or,

When the N is equal to 24, the RE position to which one N-port CSI-RS in the N-port reference signal pattern is mapped is the same as the RE position to which the three 8-port CSI-RSs in the 8-port reference signal pattern are mapped Each of the N ports is multiplexed with 8 code words of an 8-bit orthogonal spreading code.

In a possible implementation manner, in a normal cyclic prefix subframe including 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a normal cyclic prefix subframe The third OFDM symbol of slot 1 in the defined 8-port reference signal pattern and the RE position to which the three groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the 8-port defined in the normal cyclic prefix subframe The RE positions of the sixth OFDM symbol of slot 0 or slot 1 in the reference signal pattern and the RE locations to which the group of 8-port CSI-RSs on the seventh OFDM symbol are mapped are the same.

In a possible implementation manner, in a normal cyclic prefix subframe including 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a normal cyclic prefix subframe The third OFDM symbol of slot 1 in the defined 8-port reference signal pattern and the RE position to which the 2 groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the 8 ports defined in the normal cyclic prefix subframe When the sixth OFDM symbol of slot 0 in the reference signal pattern and the RE position of the group of 8-port CSI-RSs of the seventh OFDM symbol are mapped, and the 8-port reference signal pattern defined in the normal cyclic prefix subframe The RE position of the sixth OFDM symbol of the slot 1 and the RE position to which the one group of 8-port CSI-RSs of the seventh OFDM symbol are mapped is the same.

In a possible implementation manner, when N is equal to 24, and an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and the 3-group 8-port CSI-RS in the 8-port reference signal pattern is mapped to When the RE locations are the same,

In a normal cyclic prefix subframe containing 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE location, and an 8-port reference signal defined in a normal cyclic prefix subframe The third OFDM symbol of slot 1 and the three sets of 8-port CSI-RS of the fourth OFDM symbol, the sixth OFDM symbol of slot 1, and the one set of 8-port CSI-RS of the seventh OFDM symbol The RE position at which the sixth OFDM symbol of slot 0 and any three groups of 8-port CSI-RSs of the seventh OFDM symbol are mapped are the same.

In a possible implementation, in a normal cyclic subframe including 14 OFDM symbols, each group of S port CSI-RSs is on the sixth OFDM symbol and the seventh OFDM symbol of the slot 0 or slot 1. a packet, and a third OFDM symbol of the slot 1 and a packet on the fourth OFDM symbol are multiplexed on 8 REs using an 8-bit orthogonal spreading code;

Wherein the sixth OFDM symbol of the slot 0 or slot 1 and one packet on the seventh OFDM symbol are the sixth OFDM symbol and the seventh OFDM for the slot 0 or slot 1 A group of 8-port CSI-RSs on a symbol is divided into four packets of two packets occupying two REs according to subcarriers;

The third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are three groups of 8-port CSI-RSs on the third OFDM symbol of the slot 1 and the fourth OFDM symbol. According to the subcarrier, the packet is divided into four packets each occupying 6 REs.

In a possible implementation, in a normal cyclic subframe including 14 OFDM symbols, each group of S port CSI-RSs is a packet on a sixth OFDM symbol and a seventh OFDM symbol of the slot 0, And a sixth OFDM symbol of the slot 1 and a packet on the seventh OFDM symbol, and a third OFDM symbol of the slot 1 and a packet of the fourth OFDM symbol, using 8-bit orthogonal expansion The frequency code is multiplexed on 8 REs;

The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are a sixth OFDM symbol of the slot 0 and a group of 8-port CSI on the seventh OFDM symbol. -RS is divided into four packets of two packets occupying two REs respectively according to subcarriers;

The sixth OFDM symbol of the slot 1 and one packet on the seventh OFDM symbol are a set of 8-port CSI-RSs on the sixth OFDM symbol of the slot 1 and the seventh OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

The third OFDM symbol of the slot 1 and one packet of the fourth OFDM symbol are in accordance with the third OFDM symbol of the slot 1 and the two groups of 8-port CSI-RSs on the fourth OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.

In a possible implementation, in a DwPTS including 11 or 12 OFDM symbols, an N-port reference signal pattern is mapped to an RE position of an N-port CSI-RS, and an 8-port reference defined in the DwPTS The position of the RE of the sixth OFDM symbol of slot 0 and the three sets of 8-port CSI-RSs on the seventh OFDM symbol to which the signal is mapped, and the slot 0 of the 8-port reference signal pattern defined in the DwPTS The RE position of the third OFDM symbol of slot 1 and the RE position to which one group of 8-port CSI-RSs on the fourth OFDM symbol are mapped is the same.

In a possible implementation, in a DwPTS including 11 or 12 OFDM symbols, an N-port reference signal pattern is mapped to an RE position of an N-port CSI-RS, and an 8-port reference defined in the DwPTS The sixth OFDM symbol of slot 0 in the signal pattern and the RE position to which the two sets of 8-port CSI-RSs on the seventh OFDM symbol are mapped, and the slot 0 of the 8-port reference signal pattern defined in the DwPTS The third OFDM symbol and the RE position of the group of 8-port CSI-RSs of the fourth OFDM symbol are mapped, and the third OFDM symbol and the fourth OFDM of slot 1 in the 8-port reference signal pattern defined in the DwPTS The RE positions formed by the RE positions to which the set of 8-port CSI-RSs of the symbol are mapped are the same.

In a possible implementation manner, when N is equal to 24, and an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and the 3-group 8-port CSI-RS in the 8-port reference signal pattern is mapped to When the RE locations are the same,

In a DwPTS including 11 or 12 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a slot 0 in an 8-port reference signal pattern defined in the DwPTS The sixth OFDM symbol and the third set of 8-port CSI-RS of the seventh OFDM symbol, the third OFDM symbol of slot 0, and the first set of 8-port CSI-RS of the fourth OFDM symbol and the first of slot 1 The RE positions at which any three groups of 8-port CSI-RSs of the three OFDM symbols and the fourth group of 8-port CSI-RSs of the fourth OFDM symbol are mapped are the same.

In a possible implementation, in a DwPTS including 11 or 12 OFDM symbols, each group of S port CSI-RSs is on the third OFDM symbol and the fourth OFDM symbol of the slot 0 or slot 1. a packet, and a sixth OFDM symbol of the slot 0 and a packet on the seventh OFDM symbol are multiplexed on 8 REs using an 8-bit orthogonal spreading code;

The third OFDM symbol of the slot 0 or slot 1 and the last packet of the fourth OFDM symbol are the third OFDM symbol and the fourth OFDM symbol for the slot 0 or slot 1. The upper group of 8-port CSI-RSs is divided into four packets of two groups respectively occupying 2 REs according to subcarriers;

The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are three groups of 8-port CSI-RSs on the sixth OFDM symbol of the slot 0 and the seventh OFDM symbol. According to the subcarrier, the packet is divided into four packets each occupying 6 REs.

In a possible implementation, in a DwPTS comprising 11 or 12 OFDM symbols, each group of S-port CSI-RSs is in a packet on a third OFDM symbol and a fourth OFDM symbol of the slot 0, And the stated The third OFDM symbol of slot 1 and one packet on the fourth OFDM symbol, and one packet of the sixth OFDM symbol and the seventh OFDM symbol of slot 0, using an 8-bit orthogonal spreading code Multiplexing on 8 REs;

Wherein the third OFDM symbol of the slot 0 and one packet on the fourth OFDM symbol are a group of 8-port CSIs on the third OFDM symbol of the slot 0 and the fourth OFDM symbol. -RS is divided into four packets of two packets occupying two REs respectively according to subcarriers;

The third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are a group of 8-port CSI-RSs on the third OFDM symbol of the slot 1 and the fourth OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

The sixth OFDM symbol of the slot 0 and one packet of the seventh OFDM symbol are in accordance with the sixth OFDM symbol of the slot 0 and the two groups of 8-port CSI-RS on the seventh OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.

Based on the same inventive concept, an embodiment of the present invention further provides a base station, where the base station can implement the reference signal mapping process.

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention. The base station may include: a processor 901, a memory 902, a transceiver 903, and a bus interface.

The processor 901 is responsible for managing the bus architecture and general processing, and the memory 902 can store data used by the processor 901 in performing operations. The transceiver 903 is configured to receive and transmit data under the control of the processor 901.

The bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 901 and various circuits of memory represented by memory 902. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 903 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. The processor 901 is responsible for managing the bus architecture and general processing, and the memory 902 can store data used by the processor 901 in performing operations.

The flow disclosed in the embodiment of the present invention may be applied to the processor 901 or implemented by the processor 901. In the implementation process, each step of the data transmission process may be completed by an integrated logic circuit of hardware in the processor 901 or an instruction in a form of software. The processor 901 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or perform the embodiments of the present invention. Various methods, steps, and logic blocks of the disclosure. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software module can be located in random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registered And other storage media that are mature in the field. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and combines its hardware to complete the steps of the processing method of the control plane.

Specifically, the processor 901 is configured to read a program in the memory 902 and perform the following process:

Determining, according to the N-port reference signal pattern, the resource unit RE to which the channel state information reference signal CSI-RS is mapped, N being an integer greater than 16; wherein an N-port CSI-RS in the N-port reference signal pattern is mapped to The RE position is determined according to the RE position to which the CSI-RS is mapped in the plurality of 8-port reference signal patterns, and each of the N ports uses an S of 8 code words of an 8-bit orthogonal spreading code. Multiple codewords are multiplexed, and the 8-port reference signal pattern is an 8-port CSI-RS pattern defined by 3GPP Rel-13;

Resource mapping is performed on the CSI-RS according to the determined RE.

Preferably, the N is equal to 20, 24, 28 or 32.

The method for determining, by the processor 901, the RE to which the channel state information reference signal CSI-RS is mapped according to the N port reference signal pattern, and the form of the 8-port CSI-RS pattern defined by 3GPP Rel-13, refer to the foregoing implementation. For example, it will not be repeated here.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims (26)

1. A reference signal mapping method, comprising:

   Determining, according to the N-port reference signal pattern, the resource unit RE to which the channel state information reference signal CSI-RS is mapped, N being an integer greater than 16; wherein an N-port CSI-RS in the N-port reference signal pattern is mapped to The RE position is determined according to the RE position to which the CSI-RS is mapped in the plurality of 8-port reference signal patterns, and each of the N ports uses an S of 8 code words of an 8-bit orthogonal spreading code. Multiple codewords are multiplexed, and the 8-port reference signal pattern is an 8-port CSI-RS pattern defined by 3GPP Rel-13;

   Resource mapping is performed on the CSI-RS according to the determined RE.
2. The method of claim 1 wherein said N is equal to 20, 24, 28 or 32.
3. The method according to claim 1 or 2, wherein when the N is equal to 32, 28, 24 or 20, an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and The RE positions of the four groups of 8-port CSI-RSs mapped in the 8-port reference signal pattern are the same; wherein, when the N is equal to 32, each of the N ports uses an 8-bit orthogonal spreading code. 8 codewords are multiplexed, or, when the N is equal to 28, every 7 ports in the N port are multiplexed with 7 codewords of an 8-bit orthogonal spreading code, or When N is equal to 24, every 6 ports in the N port are multiplexed with 6 code words of an 8-bit orthogonal spreading code, or, when the N is equal to 20, each of the N ports 5 ports are multiplexed with 5 code words of 8-bit orthogonal spreading code;

   or,

   When the N is equal to 24, the RE position to which one N-port CSI-RS in the N-port reference signal pattern is mapped is the same as the RE position to which the three 8-port CSI-RSs in the 8-port reference signal pattern are mapped Each of the N ports is multiplexed with 8 code words of an 8-bit orthogonal spreading code.
4. The method according to claim 3, wherein in a normal cyclic prefix subframe of 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, The third OFDM symbol of slot 1 in the 8-port reference signal pattern defined in the normal cyclic prefix subframe and the RE position to which the 3 groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the normal cyclic prefix RE of the sixth OFDM symbol of slot 0 or slot 1 in the 8-port reference signal pattern defined in the subframe and the RE position to which the group of 8-port CSI-RSs on the seventh OFDM symbol are mapped The location is the same.
5. The method according to claim 3, wherein in a normal cyclic prefix subframe of 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, The third OFDM symbol of slot 1 in the 8-port reference signal pattern defined in the normal cyclic prefix subframe and the RE position to which the 2 groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the normal cyclic prefix Defined in a sub-frame The eighth OFDM symbol of slot 0 in the 8-port reference signal pattern and the RE position to which the 1-group 8-port CSI-RS of the seventh OFDM symbol is mapped, and the 8-port reference signal defined in the normal cyclic prefix subframe The RE positions of the sixth OFDM symbol of the slot 1 and the RE position to which the 1-group 8-port CSI-RS of the seventh OFDM symbol are mapped are the same.
6. The method according to claim 3, wherein N is equal to 24, and an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and the 8-port 8 in the 8-port reference signal pattern When the port CSI-RS is mapped to the same RE location,

   In a normal cyclic prefix subframe containing 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE location, and an 8-port reference signal defined in a normal cyclic prefix subframe The third OFDM symbol of slot 1 and the three sets of 8-port CSI-RS of the fourth OFDM symbol, the sixth OFDM symbol of slot 1, and the one set of 8-port CSI-RS of the seventh OFDM symbol The RE position at which the sixth OFDM symbol of slot 0 and any three groups of 8-port CSI-RSs of the seventh OFDM symbol are mapped are the same.
7. The method according to claim 4, wherein in the normal cyclic subframe comprising 14 OFDM symbols, each group of S-port CSI-RSs is in the sixth OFDM symbol of the slot 0 or slot 1. And multiplexing a packet on the seventh OFDM symbol, and a third OFDM symbol of the slot 1 and a packet on the fourth OFDM symbol, using an 8-bit orthogonal spreading code on 8 REs ;

   Wherein the sixth OFDM symbol of the slot 0 or slot 1 and one packet on the seventh OFDM symbol are the sixth OFDM symbol and the seventh OFDM for the slot 0 or slot 1 A group of 8-port CSI-RSs on a symbol is divided into four packets of two packets occupying two REs according to subcarriers;

   The third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are three groups of 8-port CSI-RSs on the third OFDM symbol of the slot 1 and the fourth OFDM symbol. According to the subcarrier, the packet is divided into four packets each occupying 6 REs.
8. The method of claim 5, wherein in a normal cyclic subframe comprising 14 OFDM symbols, each set of S-port CSI-RSs is in a sixth OFDM symbol and a seventh of said slot 0 a packet on the OFDM symbol, and a packet on the sixth OFDM symbol and the seventh OFDM symbol of the slot 1, and a packet on the third OFDM symbol and the fourth OFDM symbol of slot 1. , using 8 bit orthogonal spreading codes to multiplex on 8 REs;

   The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are a sixth OFDM symbol of the slot 0 and a group of 8-port CSI on the seventh OFDM symbol. -RS is divided into four packets of two packets occupying two REs respectively according to subcarriers;

   The sixth OFDM symbol of the slot 1 and one packet on the seventh OFDM symbol are a set of 8-port CSI-RSs on the sixth OFDM symbol of the slot 1 and the seventh OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

   The third OFDM symbol of the slot 1 and one packet of the fourth OFDM symbol are in accordance with the third OFDM symbol of the slot 1 and the two groups of 8-port CSI-RSs on the fourth OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.
9. The method according to claim 3, wherein in an downlink pilot time slot DwPTS comprising 11 or 12 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to RE position, with the sixth OFDM symbol of slot 0 in the 8-port reference signal pattern defined in the DwPTS and the location of the RE to which the 3 groups of 8-port CSI-RSs on the seventh OFDM symbol are mapped, and in the DwPTS The RE position of the third OFDM symbol of slot 0 or slot 1 in the defined 8-port reference signal pattern and the RE position to which the group of 8-port CSI-RSs on the fourth OFDM symbol are mapped are the same.
10. The method according to claim 3, wherein in a DwPTS comprising 11 or 12 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and The sixth OFDM symbol of slot 0 in the 8-port reference signal pattern defined in the DwPTS and the RE position to which the two groups of 8-port CSI-RSs on the seventh OFDM symbol are mapped, and the 8-port reference signal defined in the DwPTS The third OFDM symbol of slot 0 in the pattern and the RE position to which a group of 8-port CSI-RSs of the fourth OFDM symbol are mapped, and the third slot of slot 1 in the 8-port reference signal pattern defined in the DwPTS The RE position formed by the OFDM symbol and the RE position to which the one set of 8-port CSI-RSs of the fourth OFDM symbol are mapped is the same.
11. The method according to claim 3, wherein N is equal to 24, and an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and the 8-port 8 in the 8-port reference signal pattern When the port CSI-RS is mapped to the same RE location,

    In a DwPTS including 11 or 12 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a slot 0 in an 8-port reference signal pattern defined in the DwPTS The sixth OFDM symbol and the third set of 8-port CSI-RS of the seventh OFDM symbol, the third OFDM symbol of slot 0, and the first set of 8-port CSI-RS of the fourth OFDM symbol and the first of slot 1 The RE positions at which any three groups of 8-port CSI-RSs of the three OFDM symbols and the fourth group of 8-port CSI-RSs of the fourth OFDM symbol are mapped are the same.
12. The method according to claim 9, wherein in a DwPTS comprising 11 or 12 OFDM symbols, each group of S-port CSI-RSs is in the third OFDM symbol of the slot 0 or slot 1. And a packet on the fourth OFDM symbol, and a packet on the sixth OFDM symbol and the seventh OFDM symbol of the slot 0, multiplexed on 8 REs using an 8-bit orthogonal spreading code ;

    The third OFDM symbol of the slot 0 or slot 1 and the last packet of the fourth OFDM symbol are the third OFDM symbol and the fourth OFDM symbol for the slot 0 or slot 1. The upper group of 8-port CSI-RSs is divided into four packets of two groups respectively occupying 2 REs according to subcarriers;

    The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are three groups of 8-port CSI-RSs on the sixth OFDM symbol of the slot 0 and the seventh OFDM symbol. According to the subcarrier, the packet is divided into four packets each occupying 6 REs.
13. The method of claim 10, wherein in a DwPTS comprising 11 or 12 OFDM symbols, each set of S-port CSI-RSs is at the third OFDM symbol and the fourth of the time slot 0 a packet on the OFDM symbol, and a third OFDM symbol of the slot 1 and a packet on the fourth OFDM symbol, and a packet of the sixth OFDM symbol and the seventh OFDM symbol of slot 0 , using 8 bit orthogonal spreading codes to multiplex on 8 REs;

    Wherein the third OFDM symbol of the slot 0 and one packet on the fourth OFDM symbol are a group of 8-port CSIs on the third OFDM symbol of the slot 0 and the fourth OFDM symbol. -RS is divided into four packets of two packets occupying two REs respectively according to subcarriers;

    The third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are a group of 8-port CSI-RSs on the third OFDM symbol of the slot 1 and the fourth OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

    The sixth OFDM symbol of the slot 0 and one packet of the seventh OFDM symbol are in accordance with the sixth OFDM symbol of the slot 0 and the two groups of 8-port CSI-RS on the seventh OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.
14. A reference signal mapping device, comprising:

    a processing module, configured to determine, according to the N-port reference signal pattern, a resource unit RE to which the channel state information reference signal CSI-RS is mapped, where N is an integer greater than 16, wherein an N-port CSI in the N-port reference signal pattern - The RE position to which the RS is mapped is determined according to the RE position to which the CSI-RS is mapped in the plurality of sets of 8-port reference signal patterns, and each of the N ports uses 8 bits of 8-bit orthogonal spreading code S codewords in the codeword are multiplexed, and the 8-port reference signal pattern is an 8-port CSI-RS pattern defined by 3GPP Rel-13;

    And a mapping module, configured to perform resource mapping on the CSI-RS according to the RE determined by the processing module.
15. The apparatus of claim 14 wherein said N is equal to 20, 24, 28 or 32.
16. The apparatus according to claim 14 or 15, wherein when said N is equal to 32, 28, 24 or 20, an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and The RE positions of the four groups of 8-port CSI-RSs mapped in the 8-port reference signal pattern are the same; wherein, when the N is equal to 32, Each of the eight ports in the N port is multiplexed with 8 code words of an 8-bit orthogonal spreading code, or, when the N is equal to 28, each of the N ports is 8-bit positive. The seven codewords of the cross-spreading code are multiplexed, or, when the N is equal to 24, each of the six ports of the N-port is multiplexed with six codewords of an 8-bit orthogonal spreading code. Or, when the N is equal to 20, each of the five ports of the N port is multiplexed by using five codewords of an 8-bit orthogonal spreading code;

    or,

    When the N is equal to 24, the RE position to which one N-port CSI-RS in the N-port reference signal pattern is mapped is the same as the RE position to which the three 8-port CSI-RSs in the 8-port reference signal pattern are mapped Each of the N ports is multiplexed with 8 code words of an 8-bit orthogonal spreading code.
17. The apparatus according to claim 16, wherein in a normal cyclic prefix subframe of 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, The third OFDM symbol of slot 1 in the 8-port reference signal pattern defined in the normal cyclic prefix subframe and the RE position to which the 3 groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the normal cyclic prefix RE of the sixth OFDM symbol of slot 0 or slot 1 in the 8-port reference signal pattern defined in the subframe and the RE position to which the group of 8-port CSI-RSs on the seventh OFDM symbol are mapped The location is the same.
18. The apparatus according to claim 16, wherein in a normal cyclic prefix subframe of 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, The third OFDM symbol of slot 1 in the 8-port reference signal pattern defined in the normal cyclic prefix subframe and the RE position to which the 2 groups of 8-port CSI-RSs on the fourth OFDM symbol are mapped, and the normal cyclic prefix The RE position of the sixth OFDM symbol of slot 0 in the 8-port reference signal pattern defined in the subframe and the 1-group 8-port CSI-RS of the seventh OFDM symbol are mapped, and defined in the normal cyclic prefix subframe The RE position of the sixth OFDM symbol of the slot 1 in the 8-port reference signal pattern and the RE position to which the 1-group 8-port CSI-RS of the seventh OFDM symbol is mapped is the same.
19. The apparatus according to claim 16, wherein N is equal to 24, and an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and the 8-port 8 in the 8-port reference signal pattern When the port CSI-RS is mapped to the same RE location,

    In a normal cyclic prefix subframe containing 14 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE location, and an 8-port reference signal defined in a normal cyclic prefix subframe The third OFDM symbol of slot 1 and the three sets of 8-port CSI-RS of the fourth OFDM symbol, the sixth OFDM symbol of slot 1, and the one set of 8-port CSI-RS of the seventh OFDM symbol The third OFDM symbol of slot 0 and any three groups of 8-port CSI-RSs of the seventh OFDM symbol are mapped to The RE position is the same.
20. The apparatus according to claim 17, wherein in a normal cyclic subframe including 14 OFDM symbols, a sixth OFDM symbol of each group of S port CSI-RSs in said slot 0 or slot 1 And multiplexing a packet on the seventh OFDM symbol, and a third OFDM symbol of the slot 1 and a packet on the fourth OFDM symbol, using an 8-bit orthogonal spreading code on 8 REs ;

    Wherein the sixth OFDM symbol of the slot 0 or slot 1 and one packet on the seventh OFDM symbol are the sixth OFDM symbol and the seventh OFDM for the slot 0 or slot 1 A group of 8-port CSI-RSs on a symbol is divided into four packets of two packets occupying two REs according to subcarriers;

    The third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are three groups of 8-port CSI-RSs on the third OFDM symbol of the slot 1 and the fourth OFDM symbol. According to the subcarrier, the packet is divided into four packets each occupying 6 REs.
21. The apparatus according to claim 18, wherein in a normal cyclic subframe comprising 14 OFDM symbols, a sixth OFDM symbol and a seventh of each set of S-port CSI-RSs in said slot 0 a packet on the OFDM symbol, and a packet on the sixth OFDM symbol and the seventh OFDM symbol of the slot 1, and a packet on the third OFDM symbol and the fourth OFDM symbol of slot 1. , using 8 bit orthogonal spreading codes to multiplex on 8 REs;

    The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are a sixth OFDM symbol of the slot 0 and a group of 8-port CSI on the seventh OFDM symbol. -RS is divided into four packets of two packets occupying two REs respectively according to subcarriers;

    The sixth OFDM symbol of the slot 1 and one packet on the seventh OFDM symbol are a set of 8-port CSI-RSs on the sixth OFDM symbol of the slot 1 and the seventh OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

    The third OFDM symbol of the slot 1 and one packet of the fourth OFDM symbol are in accordance with the third OFDM symbol of the slot 1 and the two groups of 8-port CSI-RSs on the fourth OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.
22. The apparatus according to claim 16, wherein in a DwPTS including 11 or 12 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and The position of the RE of the sixth OFDM symbol of slot 0 in the 8-port reference signal pattern defined in the DwPTS and the 3-group 8-port CSI-RS on the seventh OFDM symbol, and the 8-port reference defined in the DwPTS The RE position of the third OFDM symbol of slot 0 or slot 1 in the signal pattern and the RE position to which the group of 8-port CSI-RSs on the fourth OFDM symbol are mapped are the same.
23. The apparatus according to claim 16, wherein in a DwPTS including 11 or 12 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and The sixth OFDM symbol of slot 0 in the 8-port reference signal pattern defined in the DwPTS and the RE position to which the two groups of 8-port CSI-RSs on the seventh OFDM symbol are mapped, and the 8-port reference signal defined in the DwPTS The third OFDM symbol of slot 0 in the pattern and the RE position to which a group of 8-port CSI-RSs of the fourth OFDM symbol are mapped, and the third slot of slot 1 in the 8-port reference signal pattern defined in the DwPTS The RE position formed by the OFDM symbol and the RE position to which the one set of 8-port CSI-RSs of the fourth OFDM symbol are mapped is the same.
24. The apparatus according to claim 16, wherein N is equal to 24, and an N-port CSI-RS in the N-port reference signal pattern is mapped to the RE position, and the 8-port 8 in the 8-port reference signal pattern When the port CSI-RS is mapped to the same RE location,

    In a DwPTS including 11 or 12 OFDM symbols, an N-port CSI-RS in the N-port reference signal pattern is mapped to an RE position, and a slot 0 in an 8-port reference signal pattern defined in the DwPTS The sixth OFDM symbol and the third set of 8-port CSI-RS of the seventh OFDM symbol, the third OFDM symbol of slot 0, and the first set of 8-port CSI-RS of the fourth OFDM symbol and the first of slot 1 The RE positions at which any three groups of 8-port CSI-RSs of the three OFDM symbols and the fourth group of 8-port CSI-RSs of the fourth OFDM symbol are mapped are the same.
25. The apparatus according to claim 22, wherein in a DwPTS comprising 11 or 12 OFDM symbols, each group of S port CSI-RSs is in said slot 0 or slot 3 of the third OFDM symbol And a packet on the fourth OFDM symbol, and a packet on the sixth OFDM symbol and the seventh OFDM symbol of the slot 0, multiplexed on 8 REs using an 8-bit orthogonal spreading code ;

    The third OFDM symbol of the slot 0 or slot 1 and the last packet of the fourth OFDM symbol are the third OFDM symbol and the fourth OFDM symbol for the slot 0 or slot 1. The upper group of 8-port CSI-RSs is divided into four packets of two groups respectively occupying 2 REs according to subcarriers;

    The sixth OFDM symbol of the slot 0 and one packet on the seventh OFDM symbol are three groups of 8-port CSI-RSs on the sixth OFDM symbol of the slot 0 and the seventh OFDM symbol. According to the subcarrier, the packet is divided into four packets each occupying 6 REs.
26. The apparatus according to claim 23, wherein in a DwPTS comprising 11 or 12 OFDM symbols, a third OFDM symbol and a fourth of each set of S-port CSI-RSs in said slot 0 a packet on the OFDM symbol, and a third OFDM symbol of the slot 1 and a packet on the fourth OFDM symbol, and a packet of the sixth OFDM symbol and the seventh OFDM symbol of slot 0 , using 8 bit orthogonal spreading codes to multiplex on 8 REs;

    Wherein the third OFDM symbol of the slot 0 and one packet on the fourth OFDM symbol are The third OFDM symbol of slot 0 and the group of 8-port CSI-RSs on the fourth OFDM symbol are equally divided into four packets of two REs respectively occupying two REs according to subcarriers;

    The third OFDM symbol of the slot 1 and one packet on the fourth OFDM symbol are a group of 8-port CSI-RSs on the third OFDM symbol of the slot 1 and the fourth OFDM symbol. Dividing into one of four packets occupying 2 REs respectively according to subcarriers;

    The sixth OFDM symbol of the slot 0 and one packet of the seventh OFDM symbol are in accordance with the sixth OFDM symbol of the slot 0 and the two groups of 8-port CSI-RS on the seventh OFDM symbol. The subcarrier is equally divided into one of four packets occupying 4 REs each.

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