CN108809494B

CN108809494B - Sending method, receiving method, related equipment and system of CSI-RS sequence

Info

Publication number: CN108809494B
Application number: CN201710312474.3A
Authority: CN
Inventors: 李建军
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2017-05-05
Filing date: 2017-05-05
Publication date: 2021-03-23
Anticipated expiration: 2037-05-05
Also published as: CN108809494A

Abstract

The invention provides a sending method, a receiving method, related equipment and a system of a CSI-RS sequence, wherein the method comprises the following steps: generating CSI-RS sequences corresponding to each bandwidth segment in the carrier; and transmitting the CSI-RS sequence to a user terminal. The invention configures the corresponding CSI-RS sequence for each bandwidth segment, solves the CSI-RS configuration problem when different subcarrier intervals exist in the carrier, and improves the performance of the CSI-RS sequence and the flexibility of system transmission.

Description

Sending method, receiving method, related equipment and system of CSI-RS sequence

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a sending method, a receiving method, a related device, and a system for a CSI-RS sequence.

Background

In the current communication system, a Channel State Information Reference Signal (CSI-RS) sequence is configured in the whole carrier, wherein the length of the CSI-RS is determined by the number of Resource Blocks (RBs) contained in the maximum bandwidth that can be supported by the communication system.

In future communication systems (e.g., 5G systems), different subcarrier spacings may exist within the same carrier, and Orthogonal Frequency Division Multiplexing (OFDM) symbol lengths may differ. Since one RB includes 12 subcarriers, the bandwidth of the RB is different at different subcarrier intervals, and the CSI-RS sequence is difficult to span different subcarrier intervals, the CSI-RS sequence cannot be configured in the carrier according to the prior art.

Disclosure of Invention

The embodiment of the invention provides a sending method, a receiving method, related equipment and a system of a CSI-RS sequence, and aims to solve the problem that the prior art cannot be suitable for different subcarrier intervals in carriers.

In a first aspect, an embodiment of the present invention provides a method for sending a CSI-RS sequence, including:

generating CSI-RS sequences corresponding to each bandwidth segment in the carrier;

and transmitting the CSI-RS sequence to a user terminal.

In a second aspect, an embodiment of the present invention provides a method for receiving a CSI-RS sequence, including:

receiving CSI-RS sequences which are sent by network side equipment and correspond to each bandwidth segment in a carrier wave;

and performing channel estimation according to the CSI-RS sequence.

In a third aspect, an embodiment of the present invention provides a network side device, including:

a generating module, configured to generate CSI-RS sequences corresponding to respective bandwidth segments within a carrier;

and the first sending module is used for sending the CSI-RS sequence to the user terminal.

In a fourth aspect, an embodiment of the present invention provides a user terminal, including:

the first receiving module is used for receiving CSI-RS sequences which are sent by network side equipment and correspond to each bandwidth segment in a carrier;

and the estimation module is used for carrying out channel estimation according to the CSI-RS sequence.

In a fifth aspect, an embodiment of the present invention provides a CSI-RS sequence transmission system, including a network side device and a user terminal provided by the embodiments of the present invention.

In this way, in the embodiment of the present invention, CSI-RS sequences corresponding to each bandwidth segment in a carrier are generated; and transmitting the CSI-RS sequence to a user terminal. The embodiment of the invention configures the corresponding CSI-RS sequence for each bandwidth segment, solves the CSI-RS configuration problem when different subcarrier intervals exist in the carrier, and improves the performance of the CSI-RS sequence and the flexibility of system transmission.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a block diagram of a transmission system for CSI-RS sequences to which embodiments of the present invention are applicable;

fig. 2 is a flowchart of a method for transmitting a CSI-RS sequence according to an embodiment of the present invention;

fig. 3 is a flowchart of another method for transmitting a CSI-RS sequence according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for receiving a CSI-RS sequence according to an embodiment of the present invention;

fig. 5 is a flowchart of another receiving method of CSI-RS sequences according to an embodiment of the present invention;

fig. 6 is a structural diagram of a network side device according to an embodiment of the present invention;

fig. 7 is a block diagram of another network-side device according to an embodiment of the present invention;

fig. 8 is a block diagram of another network-side device according to an embodiment of the present invention;

fig. 9 is a structural diagram of a user equipment according to an embodiment of the present invention;

fig. 10 is a block diagram of another user terminal according to an embodiment of the present invention;

fig. 11 is a structural diagram of another network-side device according to an embodiment of the present invention;

fig. 12 is a block diagram of another ue 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 below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a structural diagram of a CSI-RS sequence transmission system applicable in the embodiment of the present invention, and as shown in fig. 1, the system includes a user terminal 11 and a network side device 12, where the user terminal 11 may be a ue (user equipment), for example: the terminal side Device may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that the specific type of the user terminal 11 is not limited in the embodiments of the present invention. The ue 11 may establish communication with the network-side device 12, where the network in the drawing may indicate that the ue 11 wirelessly establishes communication with the network-side device 12, and the network-side device 12 may be a Transmission Reception Point (TRP), or may be a base station, and the base station may be a macro station, such as an LTE eNB, a 5G NR NB, or the like; the network side device 12 may also be an Access Point (AP).

It should be noted that, in the embodiment of the present invention, the specific type of the network-side device 12 is not limited, and the specific functions of the user terminal 11 and the network-side device 12 will be described in detail through a plurality of embodiments below.

Referring to fig. 2, fig. 2 is a flowchart of a method for transmitting a CSI-RS sequence according to an embodiment of the present invention, as shown in fig. 2, including the following steps:

step 201, generating a CSI-RS sequence corresponding to each bandwidth fragment (bandwidth part) in the carrier.

In this step, corresponding CSI-RS sequences may be generated for each bandwidth segment in the carrier, and the CSI-RS sequences corresponding to different bandwidth segments may be different, or CSI-RS sequences corresponding to a part of bandwidth segments are the same, and CSI-RS sequences corresponding to another part of bandwidth segments are different, which is not limited in this embodiment of the present invention.

In addition, in the embodiment of the present invention, the bandwidth segment may be a resource segment within a carrier, and the carrier may include a plurality of bandwidth segments.

It should be noted that, in the embodiment of the present invention, the type of the carrier is not limited, for example: may be a Pcell or Scell carrier.

Step 202, sending the CSI-RS sequence to a user terminal.

After generating corresponding CSI-RS sequences for each bandwidth segment in step 201, step 202 may send these CSI-RS sequences to the user terminal, so that the user terminal performs channel estimation using the received CSI-RS sequences. When performing channel estimation, the user terminal may estimate respective channels by using CSI-RS sequences corresponding to each bandwidth segment, for example: the CSI-RS sequence corresponding to the bandwidth segment 1 is a CSI-RS sequence 1, the CSI-RS sequence corresponding to the bandwidth segment 2 is a CSI-RS sequence 2, and the user terminal uses the CSI-RS sequence 1 to perform channel estimation on the channel of the bandwidth segment 1 and uses the CSI-RS sequence 2 to perform channel estimation on the channel of the bandwidth segment 2.

In the embodiment of the invention, the CSI-RS sequences corresponding to the bandwidth segments in the carrier are generated and sent to the user terminal, so that the problem of CSI-RS configuration when different subcarrier intervals exist in the carrier is solved, and the performance of the CSI-RS sequences and the flexibility of system transmission are improved.

Referring to fig. 3, fig. 3 is a flowchart of another method for transmitting a CSI-RS sequence according to an embodiment of the present invention, and in this embodiment, compared with the embodiment shown in fig. 2, a main difference is that a step of transmitting configuration information of each bandwidth segment to the ue is added, and as shown in fig. 3, the method includes the following steps:

step 301, generating CSI-RS sequences corresponding to each bandwidth segment within a carrier.

Optionally, the carrier includes multiple bandwidth segments, where the bandwidth segments are bandwidth resources obtained by dividing the carrier, and different bandwidth segments correspond to different CSI-RS sequences.

In the embodiment, the carrier wave can be divided into a plurality of bandwidth segments, and different bandwidth segments correspond to different CSI-RS sequences, so that the user terminal can use different CSI-RS sequences in different bandwidth segments to perform channel estimation, thereby improving the channel estimation performance of the CSI-RS sequences.

Optionally, each bandwidth segment within the carrier has a uniform subcarrier spacing.

The uniform subcarrier spacing of each bandwidth segment may be that only one subcarrier spacing exists in each bandwidth segment, that is, for any bandwidth segment, the subcarrier spacing in the bandwidth segment is the same, and the subcarrier spacing of different bandwidth segments may be different, or the subcarrier spacing of adjacent bandwidth segments is different. Since each bandwidth segment within a carrier has a uniform subcarrier spacing, the CSI-RS sequence generated for each bandwidth segment is more accurate.

Optionally, the resource blocks in each bandwidth segment in the carrier are consecutive.

In this embodiment, the resource blocks in each bandwidth segment can be continuous, so that discrete resource blocks are avoided, and the resource utilization rate is improved.

Optionally, the number of multiple RBs that can be supported at most by downlink may be predefined for different subcarrier intervals, and different subcarrier intervals in the same carrier correspond to different numbers of RBs that can be supported at most by downlink;

accordingly, the generating CSI-RS sequences corresponding to respective bandwidth segments within a carrier includes:

and respectively generating CSI-RS sequences corresponding to the bandwidth segments according to the number of RBs which can be supported by the downlink at most and correspond to the subcarrier intervals of the bandwidth segments.

In this embodiment, the CSI-RS sequence corresponding to each bandwidth segment is generated according to the number of RBs that can be supported by the downlink at most corresponding to the subcarrier spacing, so as to improve the channel estimation performance of the CSI-RS sequence corresponding to each bandwidth segment. In addition, the actual number of RBs contained in the bandwidth segment may be smaller than, based on being much smaller than, the number of RBs that can be supported at most in the corresponding downlink, so that the CSI-RS sequence may be only a part of the segment that is actually sent out, for example: the actually transmitted CSI-RS sequence segment is

Where RB0 is the sequence number of the starting RB corresponding to the subcarrier spacing used by the bandwidth segment,

the number of RBs included for a bandwidth segment, i.e., the number of RBs actually included.

The CSI-RS sequences corresponding to the bandwidth segments are respectively generated according to the number of RBs which can be supported at most by downlink and are corresponding to the subcarrier spacing of each bandwidth segment, where the CSI-RS sequences corresponding to each bandwidth segment are generated according to a pre-obtained correspondence relationship between the number of RBs which can be supported at most by downlink and the CSI-RS sequences.

Preferably, the generating CSI-RS sequences corresponding to each bandwidth segment according to the number of RBs that can be supported by the downlink at most corresponding to the subcarrier spacing of each bandwidth segment includes:

and aiming at each bandwidth segment, generating a pseudo-random sequence by using the number of the RBs which can be supported by the downlink at most and correspond to the subcarrier interval of the bandwidth segment, calculating the pseudo-random sequence, and taking the calculation result as the CSI-RS sequence corresponding to the bandwidth segment.

For example, the CSI-RS sequences corresponding to each bandwidth segment are generated by the following formula:

wherein,

indicates the CSI-RS sequence corresponding to the bandwidth segment n, c (i) is a pseudo-random sequence,

and the number of the RBs which can be supported at most by the downlink corresponding to the bandwidth segment n.

Optionally, the number of RBs which can be supported at most by downlink and corresponding to the subcarrier interval of each bandwidth segment is, the number of RBs which can be supported at most by downlink in the preset carrier is divided by 2^kThe obtained operation result, wherein, 2^kThe operation result is obtained by dividing the subcarrier interval of the bandwidth segment by the preset lowest subcarrier interval in the carriers.

In this embodiment, the number of RBs which can be supported at most in downlink in a plurality of the carriers may be predefined according to different subcarrier spacings, for example, the number of RBs which can be supported at most in downlink corresponding to the bandwidth segment of the subcarrier spacing f0 is the number of RBs which can be supported at most in downlink

Setting the number of the RBs which can be supported at most in the downlink in the preset carrier, and the number of the RBs which can be supported at most in the downlink corresponding to the bandwidth segment of the subcarrier spacing f1 as

The number of the RBs which can be supported at most by the downlink and correspond to the bandwidth segments of the subcarrier spacing fn is

Wherein fn is 2ⁿXf 0, such that

That is, the number of RBs supported by the downlink at most corresponding to the bandwidth segment with the subcarrier spacing fk

By determining the number of the RBs which can be supported by the downlink at most and correspond to the bandwidth segments, the CSI-RS sequence corresponding to each bandwidth segment can be ensured, and the user terminal can estimate the channel condition of each bandwidth segment by using the CSI-RS sequences in different bandwidth segments, so that the channel estimation performance of the CSI-RS sequences is improved.

Optionally, the generating CSI-RS sequences corresponding to each bandwidth segment in a carrier includes:

and respectively generating CSI-RS sequences corresponding to the bandwidth fragments according to the number of RBs included in each bandwidth fragment.

Wherein, the number of RBs included in each bandwidth segment can be understood as the number of RBs actually included in each bandwidth segment. In this way, according to the number of RBs included in each bandwidth segment, the respective corresponding CSI-RS sequences are generated, so that excessive generation of CSI-RS sequence segments can be avoided, and overhead can be reduced.

The CSI-RS sequences corresponding to the bandwidth segments are respectively generated according to the number of RBs included in each bandwidth segment, where the CSI-RS sequences corresponding to the bandwidth segments are generated according to a relationship between the number of RBs included in the bandwidth segment and the CSI-RS sequences, which are obtained in advance. Preferably, the generating CSI-RS sequences corresponding to the bandwidth segments according to the number of RBs included in each bandwidth segment includes:

and aiming at each bandwidth segment, generating a pseudo-random sequence by using the number of RBs included in the bandwidth segment, calculating the pseudo-random sequence, and taking the calculation result as a CSI-RS sequence corresponding to the bandwidth segment.

For example, the CSI-RS sequence corresponding to the bandwidth segment is generated by the following formula:

wherein,

the number of RBs included for bandwidth segment n.

Optionally, each bandwidth segment includes a plurality of OFDM symbols;

the generating the CSI-RS sequences corresponding to the bandwidth segments according to the number of RBs included in each bandwidth segment includes:

and aiming at each OFDM symbol of each bandwidth segment, generating a pseudo-random sequence by using the product of the number of RBs included in the bandwidth segment and the serial number of the OFDM symbol in the bandwidth segment, calculating the pseudo-random sequence, and taking the calculation result as a CSI-RS sequence corresponding to the OFDM symbol in the bandwidth segment.

Each bandwidth segment may include a plurality of OFDM symbols, and the antenna port corresponding to the bandwidth segment may have a plurality of OFDM symbols for transmission. In this embodiment, generation of a corresponding CSI-RS sequence for each OFDM symbol may be achieved, thereby further increasing the channel estimation performance of the CSI-RS sequence. For example: obtaining a CSI-RS sequence through the following formula:

wherein,

a corresponding CSI-RS sequence representing a bandwidth segment n, c (i) a pseudo-random sequence,

the number of RBs included for bandwidth segment n. In addition, the sequence segment corresponding to the first OFDM symbol in the bandwidth segment is

The obtained sequence segment is the sequence segment corresponding to the second OFDM symbol

The obtained sequence segment is … … sequence segment corresponding to k-th OFDM symbol

The resulting sequence fragment.

Step 302, sending the configuration information of each bandwidth segment to the user terminal.

Optionally, the configuration information includes at least one of:

frequency location, bandwidth, subcarrier spacing, and configuration parameters of the CSI-RS sequence.

For example: as shown in table 1:

TABLE 1 configuration information field of Bandwidth fragment

The relevant configuration of the bandwidth segment can be accurately notified to the user terminal through table 1, so that the user terminal can accurately receive the CSI-RS sequence corresponding to the bandwidth segment.

Optionally, the configuration parameter of the CSI-RS sequence includes at least one of:

the number of antenna ports of the CSI-RS sequence, the sending power of the CSI-RS sequence, frequency resources occupied by the CSI-RS sequence, a subframe for sending the CSI-RS sequence, a CSI-RS sequence identifier and a protection band of the CSI-RS sequence.

The CSI-RS sequence identifier may be an ID value required for generating a pseudo-random sequence corresponding to the CSI-RS sequence, that is, the ID value may be used to generate the pseudo-random sequence corresponding to the CSI-RS sequence, so as to generate the CSI-RS sequence.

In this embodiment, the user terminal can accurately receive the CSI-RS sequences corresponding to each bandwidth segment by configuring the parameters, thereby performing channel estimation.

Optionally, the guard band of the CSI-RS sequence includes RBs at two ends of the bandwidth segment corresponding to the CSI-RS sequence.

The RBs at two ends of the bandwidth segment may be boundary RBs at two ends of the bandwidth segment, and of course, one or more RBs consecutive to the boundary RB may also be provided. In addition, the guard band may be an RB at both ends of the bandwidth segment that does not transmit the CSI-RS sequence, for example: the boundary RB at both ends of the bandwidth segment does not transmit the CSI-RS sequence. Since at least one RB at both ends of the bandwidth segment does not transmit a CSI-RS sequence, interference existing between different bandwidth segments can be avoided, for example: interference that exists between bandwidth segments of different subcarrier spacings.

Preferably, the configuration parameters of the CSI-RS sequence are shown in table 2.

TABLE 2 configuration parameter fields of CSI-RS sequences

Through the configuration parameters of the CSI-RS sequence shown in table 2, the user terminal can accurately receive the CSI-RS sequence, avoid interference between bandwidth segments, and improve the channel estimation performance of the CSI-RS sequence.

It should be noted that, in this embodiment, step 302 may be optional, for example: the configuration information of each bandwidth segment may be pre-configured to the user terminal or pre-negotiated with the user terminal.

Optionally, before generating the CSI-RS sequences corresponding to each bandwidth segment in the carrier, the method further includes:

configuring a plurality of bandwidth segments for the carrier.

The configuring of the multiple bandwidth segments for the carrier may be configured according to a subcarrier interval, and certainly, in some scenarios, the multiple bandwidth segments may also be configured according to the number of subcarriers, which is not limited in this embodiment of the present invention.

Preferably, the configuring a plurality of bandwidth segments for the carrier includes:

and dividing continuous bandwidth resources with the same subcarrier interval in the carrier into the same bandwidth segment to obtain a plurality of bandwidth segments.

In this embodiment, it may be implemented that continuous bandwidth resources having the same subcarrier spacing are divided into the same bandwidth segment, so that the subcarrier spacing in any one of the obtained multiple bandwidth segments is the same, and the bandwidth resources are continuous, so as to improve the transmission performance of the bandwidth segment.

And step 303, sending the CSI-RS sequence to the user terminal.

The CSI-RS sequence sent in step 303 may be a CSI-RS sequence corresponding to each bandwidth segment in the carrier, so that the user terminal may receive the CSI-RS sequence corresponding to each bandwidth segment, and perform channel estimation on each bandwidth segment by using the CSI-RS sequence corresponding to each bandwidth segment.

In this embodiment, the configuration information of each bandwidth segment to the user terminal can be implemented through the above steps, so that the user terminal can accurately and quickly receive the CSI-RS sequence corresponding to each bandwidth segment to perform channel estimation on each bandwidth segment.

Referring to fig. 4, fig. 4 is a flowchart of a method for receiving a CSI-RS sequence according to an embodiment of the present invention, as shown in fig. 4, including the following steps:

step 401, receiving CSI-RS sequences corresponding to each bandwidth segment in a carrier, which are sent by a network side device.

Each bandwidth segment and the corresponding CSI-RS sequence may refer to corresponding descriptions of the embodiments shown in fig. 2 and fig. 3, which are not described herein again and may achieve the same beneficial effects.

And step 402, performing channel estimation according to the CSI-RS sequence.

When the user terminal receives the CSI-RS sequence, the CSI-RS sequence corresponding to each bandwidth segment can be used for carrying out channel estimation on each bandwidth segment so as to improve the channel estimation performance of the CSI-RS sequence.

In the embodiment, the corresponding CSI-RS sequence is configured for each bandwidth segment, so that the CSI-RS configuration problem when different subcarrier intervals exist in the carrier is solved, and the performance of the CSI-RS sequence and the flexibility of system transmission are improved.

Referring to fig. 5, fig. 5 is a flowchart of a method for receiving a CSI-RS sequence according to an embodiment of the present invention, where the main difference between this embodiment and the embodiment shown in fig. 4 is that a step of receiving configuration information of each bandwidth segment sent by the network side device is added, and as shown in fig. 5, the method includes the following steps:

step 501, receiving configuration information of each bandwidth segment sent by the network side device;

optionally, the configuration information includes at least one of:

The configuration information may refer to the corresponding description of the embodiment shown in fig. 3, which is not described herein again, and the same beneficial effects may be achieved.

The configuration parameters of the CSI-RS sequence may refer to the corresponding description of the embodiment shown in fig. 3, which is not described herein again, and the same beneficial effects may be achieved.

The protection band packet of the CSI-RS sequence may refer to the corresponding description of the embodiment shown in fig. 3, which is not described herein again, and may achieve the same beneficial effects.

It should be noted that, in this embodiment, step 501 may be optional, for example: the configuration information of each bandwidth segment may be configured by the network side device in advance, or negotiated with the network side device in advance.

Step 502, receiving a CSI-RS sequence corresponding to each bandwidth segment according to the configuration information of each bandwidth segment.

In this step, after receiving the configuration information of each bandwidth segment, the user terminal may determine the relevant configuration of each bandwidth segment, and thus the user terminal may receive the CSI-RS sequence corresponding to each bandwidth segment according to the configurations.

Each bandwidth segment, the corresponding CSI-RS sequence, and the like may refer to corresponding descriptions of the embodiments shown in fig. 2 and fig. 3, which are not described herein again and may achieve the same beneficial effects.

The above carriers, each bandwidth segment, and the corresponding CSI-RS sequence may refer to the corresponding descriptions of the embodiments shown in fig. 2 and fig. 3, which are not described herein again and may achieve the same beneficial effects.

Each bandwidth segment in the carrier may refer to the corresponding description of the embodiments shown in fig. 2 and fig. 3, which is not described herein again, and the same beneficial effects may be achieved.

Optionally, the CSI-RS sequence corresponding to each bandwidth segment includes:

and respectively generating CSI-RS sequences corresponding to the bandwidth segments according to the number of the RBs which can be supported at most in the downlink and correspond to the subcarrier intervals of the bandwidth segments, wherein different subcarrier intervals in the same carrier correspond to different numbers of the RBs which can be supported at most in the downlink.

The CSI-RS sequences corresponding to each bandwidth segment may refer to the corresponding description of the embodiment shown in fig. 3, which is not described herein again, and may achieve the same beneficial effects.

Optionally, the CSI-RS corresponding to each bandwidth segment is an operation result obtained by generating a pseudo-random sequence by using the number of RBs that can be supported by the downlink at most and corresponding to the subcarrier interval of the bandwidth segment, and performing operation on the pseudo-random sequence.

Optionally, the number of RBs that can be supported at most by downlink corresponding to the subcarrier spacing of each bandwidth segmentDividing the number of RBs which can be supported at most by 2 in the carrier wave^kThe obtained operation result, wherein, 2^kThe operation result is obtained by dividing the subcarrier interval of the bandwidth segment by the preset lowest subcarrier interval in the carriers.

The number of RBs that can be supported by the downlink most corresponding to the bandwidth segment may refer to the corresponding description of the embodiment shown in fig. 3, which is not described herein again, and the same beneficial effects may be achieved.

Optionally, the CSI-RS sequence corresponding to each wide segment includes:

and according to the number of RBs included in each bandwidth segment, respectively generating CSI-RS sequences corresponding to each bandwidth segment.

The CSI-RS sequence corresponding to each bandwidth segment may refer to the corresponding description of the embodiment shown in fig. 3, which is not described herein again, and may achieve the same beneficial effects.

Optionally, for each bandwidth segment, the CSI-RS sequence corresponding to the bandwidth segment is an operation result obtained by generating a pseudo-random sequence by using the number of RBs included in the bandwidth segment and performing operation on the pseudo-random sequence.

The CSI-RS sequence corresponding to the bandwidth segment may refer to the corresponding description of the embodiment shown in fig. 3, which is not described herein again, and may achieve the same beneficial effects.

Optionally, each bandwidth segment includes a plurality of OFDM symbols;

and the CSI-RS sequence corresponding to each OFDM symbol of each bandwidth segment is an operation result obtained by generating a pseudorandom sequence by using the product of the number of RBs included in the bandwidth segment and the serial number of the OFDM symbol in the bandwidth segment and operating the pseudorandom sequence.

The CSI-RS sequence corresponding to the OFDM symbol may refer to the corresponding description of the embodiment shown in fig. 3, which is not described herein again, and may achieve the same beneficial effects.

And step 503, performing channel estimation according to the CSI-RS sequence.

In this embodiment, the configuration information of each bandwidth segment can be received through the above steps, so that the user terminal can accurately and quickly receive the CSI-RS sequence corresponding to each bandwidth segment, so as to perform channel estimation on each bandwidth segment.

Referring to fig. 6, fig. 6 is a structural diagram of a network side device according to an embodiment of the present invention, which can implement details of the methods for transmitting CSI-RS sequences according to the embodiments shown in fig. 2 to fig. 3, and achieve the same effects. As shown in fig. 6, the network-side device 600 includes:

a generating module 601, configured to generate CSI-RS sequences corresponding to each bandwidth segment in a carrier;

a first sending module 602, configured to send the CSI-RS sequence to a user terminal.

Optionally, as shown in fig. 7, the network-side device 600 further includes:

a second sending module 603, configured to send configuration information of each bandwidth segment to the user equipment.

Optionally, the configuration information includes at least one of:

Optionally, the guard band of the CSI-RS sequence is located at RBs at two ends of the CSI-RS sequence including the corresponding bandwidth segment.

Optionally, as shown in fig. 8, the network-side device 600 further includes:

a configuring module 604, configured to configure a plurality of bandwidth segments for the carrier.

Optionally, the configuring module 604 is specifically configured to divide continuous bandwidth resources having the same subcarrier interval in the carrier into the same bandwidth segment, so as to obtain multiple bandwidth segments.

Optionally, the generating module 601 is specifically configured to generate CSI-RS sequences corresponding to each bandwidth segment according to the number of RBs which can be supported at most by downlink and correspond to subcarrier intervals of each bandwidth segment, where different subcarrier intervals in the same carrier correspond to different numbers of RBs which can be supported at most by downlink.

Optionally, the generating module 601 is specifically configured to, for each bandwidth segment, generate a pseudo-random sequence by using the number of RBs that can be supported by the downlink at most and corresponding to the subcarrier interval of the bandwidth segment, perform an operation on the pseudo-random sequence, and use an operation result as a CSI-RS sequence corresponding to the bandwidth segment.

Optionally, the generating module 601 is specifically configured to generate CSI-RS sequences corresponding to each bandwidth segment according to the number of RBs included in each bandwidth segment.

Optionally, the generating module 601 is specifically configured to, for each bandwidth segment, generate a pseudo-random sequence by using the number of RBs included in the bandwidth segment, perform an operation on the pseudo-random sequence, and use an operation result as a CSI-RS sequence corresponding to the bandwidth segment.

Optionally, each bandwidth segment includes a plurality of OFDM symbols;

the generating module 601 is specifically configured to, for each OFDM symbol of each bandwidth segment, generate a pseudo-random sequence by using a product of the number of RBs included in the bandwidth segment and a sequence number of the OFDM symbol in the bandwidth segment, perform an operation on the pseudo-random sequence, and use an operation result as a CSI-RS sequence corresponding to the OFDM symbol in the bandwidth segment.

It should be noted that, in this embodiment, the network-side device 600 may be a network-side device according to any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device 600 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Referring to fig. 9, fig. 9 is a structural diagram of a user equipment according to an embodiment of the present invention, which can implement details of the receiving method of the CSI-RS sequence shown in fig. 3 to fig. 4, and achieve the same effect. As shown in fig. 9, the user terminal 900 includes:

a first receiving module 901, configured to receive CSI-RS sequences sent by a network side device and corresponding to each bandwidth segment in a carrier;

and an estimating module 902, configured to perform channel estimation according to the CSI-RS sequence.

Optionally, as shown in fig. 10, the user terminal 900 further includes:

a second receiving module 903, configured to receive configuration information of each bandwidth segment sent by the network side device;

the first receiving module 901 is specifically configured to receive, according to the configuration information of each bandwidth segment, a CSI-RS sequence corresponding to each bandwidth segment.

Optionally, the configuration information includes at least one of:

Optionally, each bandwidth segment includes a plurality of OFDM symbols;

It should be noted that, in this embodiment, the user terminal 900 may be a user terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the user terminal in the method embodiment of the present invention may be implemented by the user terminal 900 in this embodiment, and the same beneficial effects are achieved, and details are not described here.

Referring to fig. 11, fig. 11 is a structural diagram of a network side device to which the embodiment of the present invention is applied, which can implement details of the CSI-RS sequence transmission methods in the embodiments shown in fig. 2 to fig. 3, and achieve the same effects. As shown in fig. 11, the network-side device 1100 includes: a processor 1101, a transceiver 1102, a memory 1103, a user interface 1104, and a bus interface, wherein:

a processor 1101 for reading the program in the memory 1103 and executing the following processes:

and transmitting the CSI-RS sequence to a user terminal.

Wherein the transceiver 1102 is configured to receive and transmit data under the control of the processor 1101, and the transceiver 1102 includes at least two antenna ports.

In fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1101, and various circuits, represented by memory 1103, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1102 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 1104 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 may store data used by the processor 1101 in performing operations.

Optionally, before sending the CSI-RS sequence to the user terminal, the processor 1101 is further configured to:

and sending the configuration information of each bandwidth segment to the user terminal.

Optionally, the configuration information includes at least one of:

Optionally, before generating the CSI-RS sequences corresponding to the respective bandwidth segments within the carrier, the processor 1101 is further configured to:

configuring a plurality of bandwidth segments for the carrier.

Optionally, the configuring, by the processor 1101, a plurality of bandwidth segments for the carrier includes:

Optionally, the generating, by the processor 1101, CSI-RS sequences corresponding to each bandwidth segment according to the maximum number of RBs that can be supported by downlink and corresponding to the subcarrier spacing of each bandwidth segment includes:

Optionally, the generating, by the processor 1101, CSI-RS sequences corresponding to respective bandwidth segments in a carrier includes:

Optionally, the generating, by the processor 1101, CSI-RS sequences corresponding to the respective bandwidth segments according to the number of RBs included in the respective bandwidth segments includes:

Optionally, each bandwidth segment includes a plurality of OFDM symbols;

processor 1101 generates CSI-RS sequences corresponding to each bandwidth segment according to the number of RBs included in each bandwidth segment, respectively, including:

It should be noted that, in this embodiment, the network-side device 1100 may be a network-side device in any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device 1100 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Referring to fig. 12, fig. 12 is a structural diagram of a user equipment to which an embodiment of the present invention is applied, which can implement details of the methods for receiving CSI-RS sequences shown in fig. 3 to 4, and achieve the same effect. As shown in fig. 12, the user terminal 1200 includes: at least one processor 1201, memory 1202, at least one network interface 1204, and a user interface 1203. The various components in terminal 1200 are coupled together by a bus system 1205. It is understood that bus system 1205 is used to enable connected communication between these components. Bus system 1205 includes, in addition to a data bus, a power bus, a control bus, and a status signal bus. But for clarity of illustration the various buses are labeled as bus system 1205 in figure 12.

The user interface 1203 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, track ball, touch pad, or touch screen, etc.

It is to be understood that the memory 1202 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1202 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 1202 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 12021 and application programs 12022.

The operating system 12021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 12022 contains various applications such as a Media Player (Media Player), a Browser (Browser), and the like, and is used to implement various application services. A program implementing a method according to an embodiment of the present invention may be included in the application 12022.

In the embodiment of the present invention, by calling a program or an instruction stored in the memory 1202, specifically, a program or an instruction stored in the application program 12022, the processor 1201 is configured to:

and performing channel estimation according to the CSI-RS sequence.

The method disclosed by the embodiment of the invention can be applied to the processor 1201 or implemented by the processor 1201. The processor 1201 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1201. The Processor 1201 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1202, and the processor 1201 reads information in the memory 1202 and completes the steps of the above method in combination with hardware thereof.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

Optionally, before receiving the CSI-RS sequences corresponding to each bandwidth segment in the carrier and sent by the network side device, the processor 1201 is further configured to:

receiving configuration information of each bandwidth segment sent by the network side equipment;

the CSI-RS sequences, which are sent by the network side device and correspond to each bandwidth segment in the carrier, are received by the processor 1201, where the receiving includes:

and receiving CSI-RS sequences corresponding to the bandwidth segments according to the configuration information of the bandwidth segments.

Optionally, the configuration information includes at least one of:

Optionally, each bandwidth segment includes a plurality of OFDM symbols;

It should be noted that, in this embodiment, the user terminal 1200 may be a user terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the user terminal in the method embodiment of the present invention may be implemented by the user terminal 1200 in this embodiment, and the same beneficial effects are achieved, and details are not described here.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for transmitting a CSI-RS sequence, comprising:

generating CSI-RS sequences corresponding to each bandwidth segment in a carrier, wherein different bandwidth segments correspond to different CSI-RS sequences, and the carrier is a primary cell Pcell carrier or a secondary cell Scell carrier;

transmitting the CSI-RS sequence to a user terminal;

before the sending the CSI-RS sequence to the user terminal, the method further includes:

sending the configuration information of each bandwidth segment to the user terminal;

wherein the configuration information comprises:

CSI-RS sequence identification.

2. The method of claim 1, wherein the carrier comprises a plurality of bandwidth segments, the bandwidth segments are bandwidth resources obtained by dividing the carrier, and different bandwidth segments correspond to different CSI-RS sequences.

3. The method of claim 1, wherein each bandwidth segment within the carrier has a uniform subcarrier spacing.

4. The method of claim 1, wherein resource blocks within each bandwidth segment within the carrier are contiguous.

5. The method of claim 1, wherein the configuration information comprises at least one of:

6. The method of claim 5, wherein the configuration parameters of the CSI-RS sequence comprise at least one of:

the number of antenna ports of the CSI-RS sequence, the sending power of the CSI-RS sequence, frequency resources occupied by the CSI-RS sequence, subframes for sending the CSI-RS sequence and a protection band of the CSI-RS sequence.

7. The method of claim 6, wherein the guard bands of the CSI-RS sequences comprise Resource Blocks (RBs) located at both ends of a bandwidth segment to which the CSI-RS sequences correspond.

8. The method of claim 1, wherein prior to generating the CSI-RS sequences corresponding to respective bandwidth segments within a carrier, further comprising:

configuring a plurality of bandwidth segments for the carrier.

9. The method of claim 8, wherein the configuring the plurality of bandwidth segments for the carrier comprises:

10. The method of claim 1, wherein the generating the CSI-RS sequences corresponding to respective bandwidth segments within a carrier comprises:

11. The method of claim 10, wherein the generating the CSI-RS sequences corresponding to each bandwidth segment according to the maximum number of RBs supported by downlink corresponding to the subcarrier spacing of each bandwidth segment comprises:

12. The method of claim 10,

the number of the RBs which can be supported at most in the downlink and correspond to the subcarrier interval of each bandwidth segment is that the number of the RBs which can be supported at most in the downlink in the preset carrier is divided by 2^kThe obtained operation result, wherein, 2^kThe operation result is obtained by dividing the subcarrier interval of the bandwidth segment by the preset lowest subcarrier interval in the carriers.

13. The method of claim 1, wherein the generating the CSI-RS sequences corresponding to respective bandwidth segments within a carrier comprises:

14. The method of claim 13, wherein the generating the CSI-RS sequences corresponding to the respective bandwidth segments according to the number of RBs included by the respective bandwidth segments, respectively, comprises:

15. The method of claim 13, wherein each bandwidth segment comprises a plurality of orthogonal frequency division multiplexing, OFDM, symbols;

16. A method for receiving a CSI-RS sequence, comprising:

receiving CSI-RS sequences which are sent by network side equipment and correspond to all bandwidth segments in a carrier, wherein different bandwidth segments correspond to different CSI-RS sequences, and the carrier is a primary cell Pcell carrier or a secondary cell Scell carrier;

performing channel estimation according to the CSI-RS sequence;

before the receiving the CSI-RS sequences corresponding to each bandwidth segment in the carrier sent by the network side device, the method further includes:

the receiving of the CSI-RS sequences corresponding to each bandwidth segment in the carrier sent by the network side device includes:

receiving a CSI-RS sequence corresponding to each bandwidth segment according to the configuration information of each bandwidth segment;

wherein the configuration information comprises:

CSI-RS sequence identification.

17. The method of claim 16, wherein the carrier comprises a plurality of bandwidth segments, the bandwidth segments are bandwidth resources obtained by dividing the carrier, and different bandwidth segments correspond to different CSI-RS sequences.

18. The method of claim 16, wherein each bandwidth segment within the carrier has a uniform subcarrier spacing.

19. The method of claim 16, wherein resource blocks within each bandwidth segment within the carrier are contiguous.

20. The method of claim 16, wherein the configuration information comprises at least one of:

21. The method of claim 20, wherein the configuration parameters of the CSI-RS sequence comprise at least one of:

22. The method of claim 21, wherein the guard bands of the CSI-RS sequence comprise RBs located at both ends of a bandwidth segment to which the CSI-RS sequence corresponds.

23. The method of claim 16, wherein the CSI-RS sequence for each bandwidth segment comprises:

24. The method of claim 23, wherein the CSI-RS corresponding to each bandwidth segment is an operation result obtained by generating a pseudo-random sequence using the maximum number of RBs that can be supported by a downlink corresponding to a subcarrier spacing of the bandwidth segment and performing an operation on the pseudo-random sequence.

25. The method of claim 24,

26. The method of claim 16, wherein the CSI-RS sequence for each bandwidth segment comprises:

27. The method of claim 26,

and aiming at each bandwidth segment, generating a pseudo-random sequence by using the number of RBs included in the bandwidth segment according to the CSI-RS sequence corresponding to the bandwidth segment, and calculating the pseudo-random sequence to obtain a calculation result.

28. The method of claim 26, wherein each bandwidth segment comprises a plurality of OFDM symbols;

29. A network-side device, comprising:

the generating module is used for generating CSI-RS sequences corresponding to each bandwidth segment in a carrier, wherein different bandwidth segments correspond to different CSI-RS sequences, and the carrier is a primary cell Pcell or a secondary cell Scell carrier;

a first sending module, configured to send the CSI-RS sequence to a user equipment;

the network side device further includes:

a second sending module, configured to send configuration information of each bandwidth segment to the user terminal;

wherein the configuration information comprises:

CSI-RS sequence identification.

30. The network-side device of claim 29, wherein the carrier includes multiple bandwidth segments, the bandwidth segments are bandwidth resources obtained by dividing the carrier, and different bandwidth segments correspond to different CSI-RS sequences.

31. The network-side device of claim 29, wherein each bandwidth segment within the carrier has a uniform subcarrier spacing.

32. The network-side device of claim 29, wherein resource blocks within each bandwidth segment within the carrier are contiguous.

33. The network-side device of claim 29, wherein the configuration information comprises at least one of:

34. The network-side device of claim 33, wherein the configuration parameters of the CSI-RS sequence comprise at least one of:

35. The network-side device of claim 34, wherein guard bands of the CSI-RS sequence are located at RBs at both ends of the CSI-RS sequence including the corresponding bandwidth segment.

36. The network-side device of claim 29, further comprising:

a configuration module configured to configure a plurality of bandwidth segments for the carrier.

37. The network-side device of claim 36, wherein the configuration module is specifically configured to divide continuous bandwidth resources having the same subcarrier spacing in the carriers into the same bandwidth segment, so as to obtain multiple bandwidth segments.

38. The network-side device of claim 29, wherein the generating module is specifically configured to generate CSI-RS sequences corresponding to each bandwidth segment according to the number of RBs which can be supported at most in downlink and correspond to subcarrier intervals of each bandwidth segment, respectively, where different subcarrier intervals in a same carrier correspond to different numbers of RBs which can be supported at most in downlink.

39. The network-side device of claim 38, wherein the generating module is specifically configured to, for each bandwidth segment, generate a pseudo-random sequence by using a number of RBs that can be supported by the downlink at most corresponding to a subcarrier interval of the bandwidth segment, perform an operation on the pseudo-random sequence, and use an operation result as the CSI-RS sequence corresponding to the bandwidth segment.

40. The network-side device of claim 38,

41. The network-side device of claim 29, wherein the generating module is specifically configured to generate CSI-RS sequences corresponding to each bandwidth segment according to the number of RBs included in each bandwidth segment.

42. The network-side device of claim 41, wherein the generating module is specifically configured to, for each bandwidth segment, generate a pseudo-random sequence using the number of RBs included in the bandwidth segment, perform an operation on the pseudo-random sequence, and use a result of the operation as the CSI-RS sequence corresponding to the bandwidth segment.

43. The network-side device of claim 41, wherein each bandwidth segment includes a plurality of OFDM symbols;

the generating module is specifically configured to, for each OFDM symbol of each bandwidth segment, generate a pseudorandom sequence by using a product of the number of RBs included in the bandwidth segment and a sequence number of the OFDM symbol in the bandwidth segment, perform an operation on the pseudorandom sequence, and use an operation result as a CSI-RS sequence corresponding to the OFDM symbol in the bandwidth segment.

44. A user terminal, comprising:

the first receiving module is used for receiving CSI-RS sequences which are sent by network side equipment and correspond to each bandwidth segment in a carrier, wherein different bandwidth segments correspond to different CSI-RS sequences, and the carrier is a primary cell Pcell carrier or a secondary cell Scell carrier;

the estimation module is used for carrying out channel estimation according to the CSI-RS sequence;

the user terminal further comprises:

a second receiving module, configured to receive configuration information of each bandwidth segment sent by the network side device;

the first receiving module is specifically configured to receive, according to the configuration information of each bandwidth segment, a CSI-RS sequence corresponding to each bandwidth segment;

wherein the configuration information comprises:

CSI-RS sequence identification.

45. The UE of claim 44, wherein the carrier comprises multiple bandwidth segments, the bandwidth segments are bandwidth resources obtained by dividing the carrier, and different bandwidth segments correspond to different CSI-RS sequences.

46. The user terminal of claim 44, wherein each bandwidth segment within the carrier has a uniform subcarrier spacing.

47. The user terminal of claim 44, wherein resource blocks within each bandwidth segment within the carrier are contiguous.

48. The user terminal of claim 47, wherein the configuration information comprises at least one of:

49. The user terminal of claim 48, wherein the configuration parameters of the CSI-RS sequence comprise at least one of:

50. The user terminal of claim 49, wherein the guard band of the CSI-RS sequence comprises at least one Resource Block (RB) located at both ends of a bandwidth segment to which the CSI-RS sequence corresponds.

51. The ue of claim 44, wherein the CSI-RS sequences for each bandwidth segment comprise:

52. The UE of claim 51, wherein the CSI-RS corresponding to each bandwidth segment is an operation result obtained by generating a pseudo-random sequence using the number of RBs that can be supported by the downlink at most corresponding to the subcarrier spacing of the bandwidth segment, and performing an operation on the pseudo-random sequence.

53. The user terminal of claim 52,

54. The ue of claim 44, wherein the CSI-RS sequences for each bandwidth segment comprise:

55. The user terminal of claim 54,

56. The user terminal of claim 54, wherein each bandwidth segment includes a plurality of OFDM symbols;

57. A transmission system of CSI-RS sequence, characterized in that, it comprises the network side device of any claim 29 to 43 and the user terminal of any claim 44 to 56.