WO2012130148A1

WO2012130148A1 - Pilot sequence processing method and equipment

Info

Publication number: WO2012130148A1
Application number: PCT/CN2012/073250
Authority: WO
Inventors: 陈文洪; 高秋彬; 彭莹
Original assignee: 电信科学技术研究院
Priority date: 2011-03-29
Filing date: 2012-03-29
Publication date: 2012-10-04
Also published as: CN102142918B; CN102142918A

Abstract

Disclosed in the present invention is a pilot sequence processing method and equipment, comprising: a base station either instructs a user equipment (UE) or a UE group to generate a pilot ID to be used by the pilot sequence, or determines, according to preset rules agreed upon by the base station and the UE, a pilot ID to be used when generating the pilot sequence, and subsequently generates the pilot sequence according to the pilot ID. The UE determines the pilot ID to be used when generating a pilot sequence according to the instructions of the base station or according to the preset rules agreed upon by the base station and the UE, and subsequently generates a pilot signal according to said pilot ID. The method of the invention can use different pilot sequence configurations to guarantee orthogonality of pilot sequences between UEs, thereby improving channel estimation.

Description

The invention relates to a method and a device for processing a pilot sequence. The application is filed on March 29, 2011, the Chinese Patent Office, the application number is 201110076780.4, and the invention is entitled "A Method and Apparatus for Processing a Pilot Sequence". Priority is hereby incorporated by reference in its entirety. Technical field

The present invention relates to wireless communication technologies, and in particular, to a method and a device for processing a pilot sequence. Background technique

In the uplink transmission of the LTE-A (Long Term Evolution-Advanced) system, various RS (reference signal/reference signal) sequences are initialized according to the Cdl_ID (cell identifier) of the serving cell. RS initialization in different cells is generally different. In a CoMP (Cooperative Multiple Point Transmission) system, MU-MIMO (Multi-User MIMO, Multiple Input Multiple Output) processing can be performed to improve spectrum efficiency. That is, the base stations of multiple cells transmit data to multiple UEs (User Equipments) at the same time, or receive data of multiple UEs at the same time, and these UEs occupy the same physical resources for multiplexing. If the multiplexed UE belongs to the same cell, the orthogonality of the RS signals between different UEs can be ensured by the configuration of the RS (such as port, cyclic shift, etc.).

However, the shortcomings of the prior art are: The generation of the RS sequence in the prior art is always obtained according to the cell ID of the serving cell, and in many scenarios, the resource multiplexing between different cell UEs cannot be supported, and the orthogonality between the RSs cannot be guaranteed. Sex. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and a device for processing a pilot sequence, which are used to ensure the orthogonality between RSs when supporting resource multiplexing between UEs in different cells.

In the embodiment of the present invention, a method for processing a pilot sequence is provided, which includes the following steps. Step:

Determining, by the base station, a pilot identifier used by the pilot sequence of the UE or UE group of the user equipment;

The base station indicates the pilot identity of the UE or the UE group.

A method for processing a pilot sequence is provided in the embodiment of the present invention, including the following steps:

Receiving, by the UE, an indication of the base station, where the indication includes a pilot identifier used by the pilot sequence determined by the base station to generate a pilot sequence of the UE or the UE group;

The UE generates a pilot sequence according to the pilot identifier.

Determining, according to a preset rule, a pilot identifier used in generating a pilot sequence;

A pilot sequence is generated based on the pilot identification.

A base station is provided in the embodiment of the present invention, including:

a determining module, configured to determine a pilot identifier used by the pilot sequence of the UE or the UE group when generating;

And an indication module, configured to indicate the pilot identifier of the UE or the UE group.

A user equipment is provided in the embodiment of the present invention, including:

a receiving module, configured to receive an indication of a base station, where the indication includes a pilot identifier used by a base station or a UE group determined by a base station to generate a pilot sequence;

And a generating module, configured to generate a pilot sequence according to the pilot identifier.

The embodiment of the present invention provides a processing device for a pilot sequence, including: a determining module, configured to determine, according to a preset rule, a pilot identifier used when generating a pilot sequence;

The beneficial effects of the present invention are as follows:

In the technical solution provided by the embodiment of the present invention, since the pilot identifier used by the UE to generate the pilot sequence is the base station indicating the UE/UE group, or is agreed with the base station, the UE that can be scheduled for resource multiplexing adopts the same The RS-based sequence, so that different RS configurations can be utilized to ensure RS orthogonality between UEs. And further improve the channel estimation can. Further, mutual interference of RSs between UEs performing resource multiplexing can also be reduced. DRAWINGS

1 is a schematic diagram of a single user JT according to an embodiment of the present invention;

2 is a schematic diagram of a multi-user JT according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart of a method for processing a base station side pilot sequence in an embodiment of the present invention;

Figure

5 is a schematic flowchart of a method for processing a pilot sequence in an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a processing device of a pilot sequence in an embodiment of the present invention. detailed description

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

The inventor noticed during the invention:

In the current LTE-A system, a downlink DMRS (demodulation reference signal) can be transmitted from multiple ports, and the terminal performs channel detection according to the channel estimation obtained by the DMRS. The DMRS scrambling sequence is generated by the following equation:

O. '42A^ ^DL - 1 normal cyclic prefix

0 ^16A^ ^DL - 1 exteiKled cyclic prefix

3⁄4rma3⁄4DL

The ^RB is the maximum number of RBs (resource blocks) in the downlink _{: the} pseudo-random sequence is initialized by the following formula:

^ _t =(L" _s /2"+l)'(2J +l)'2 ¹⁶ + " Where ^s is the slot number,

The serving cell ID (identification) for the UE,

"^ ¹⁰ is the ID of the scrambling sequence and takes a value of 0 or 1.

In the same cell MU-MIMO transmission, the UE can have two different DMRS port configurations and two different scrambling sequence IDs (SCID: Scrambling ID) configurations, so it can support up to 4 users based on DMRS. Multiplexed transmission. At this time, different users have up to four DMRS configurations, which are:

1, DMRS configuration 1 antenna port = 7, SCID = 0;

2. DMRS configuration 2 antenna port = 8, SCID = 0;

3. DMRS configuration 3 antenna port = 7, SCID=1;

44. DMRS configuration is straight 44: Antenna port = 8, SCID=1.

In a CoMP system, a set of transmission points for joint transmission of a certain UE or group of UEs is generally called a cooperative cluster, and each cooperative cluster may have its own group ID (group identifier) to identify different cooperative clusters. Multiple transmission points (cells) in a cooperative cluster can simultaneously transmit data to one or more UEs to obtain joint processing and MU-MIMO gain.

Figure 1 is a schematic diagram of single-user JT (Joint Transmission). Figure 2 is a schematic diagram of multi-user JT. If the same resource only transmits data to one UE, it is called single-user JT, as shown in Figure 1. If the same The resource transmits data to multiple UEs at the same time, which is called multi-user JT, as shown in Figure 2. In the case of multi-user JT, if the multiplexed UE belongs to a different serving cell, for example, UE1 belongs to Cdll and UE3 belongs to Cell3 in FIG. 2, when one base station simultaneously sends DMRS to multiple multiplexed UEs, different UEs The DMRS sequences are initialized differently and cannot be orthogonalized by ports or scrambling sequences. At this time, the mutual interference between the multiplexed UEs is large, which greatly affects the demodulation performance of the data, thereby reducing the transmission rate. Therefore, it is necessary to make the multiplexed UEs performing MU-JT (multi-user JT) transmission adopt the same DMRS base sequence, that is, the pseudo-random sequence initialization uses the same Cell_ID regardless of whether it belongs to the same cell.

In addition, in the uplink transmission, the DMR base sequence is obtained by the following equation:

Group hopping pattern

0 if group hopping is allowed

/gh diimod 30 if group hopping is turned off base ^{0d 30} columns in each

Wireless

Initialize, for the service of the UE

Service cell ID.

Sequence hopping pattern:

c (« _s ) if the sequence length is greater than or equal to 6PRB and the group hopping is turned off and sequence hopping is turned on

V

0 Other situations

The pseudo-random sequence is used at the beginning of each radio frame.

Initialize.

It can be seen that the UL (Up-Link, Uplink) DMRS base sequence generation is related to the cell ID.

The closely related DMRS base sequences obtained by different cell IDs are also different. Even

The UL DMRS base sequence of the two cells is the same, and the DMRS sequence is followed in different time slots.

The ring shift and the Cell ID are also related, and the cyclic shift calculation formula is as follows:

a = 27m"Yl

PDCCH (physical downlink control channel) signaling indication, ^{3⁄4 W =} ∑- ^C ^ - ^ ^{+ i)} - ^{2! is} called a cyclic shift skip sample, ^ is a time-series sequence-specific, it is at the beginning of each radio frame

2 ⁵ + strict ss ^CH

use

Initialize.

It can be seen that for different cell IDs, the cyclic shift hopping sequence generation is also different, so that the cyclic shift hopping between the two time slots is different for different cells, and thus the OCC (Orthogonal Cover Code, The orthogonality code based on the time slot is used to obtain orthogonality between the two cell DMRS sequences.

In uplink transmission, MU-MIMO multiplexing transmission between UEs mainly relies on cyclic shift of sequence or OCC to obtain orthogonality. If the UE belongs to a different cell, the cell IDs are different, and the generated DMRS base sequences are also different. At this time, orthogonality cannot be guaranteed by different cyclic shifts. At the same time, since the cyclic shift hopping between the slots is different for different Cell IDs, the OCC cannot be used to obtain orthogonality, which greatly limits the flexibility of resource multiplexing between UEs. In many cases, especially in a CoMP scenario, it is difficult to ensure the orthogonality of DMRS between UEs in different cells, and this will cause large interference in the DMRS of adjacent cells in the system.

That is, if the multiplexed UEs belong to the same cell, the orthogonality of the RS signals between different UEs can be ensured by the configuration of the RS (such as port, cyclic shift, etc.). However, if the multiplexed UEs belong to different cells, their RS-based sequences are different, and the orthogonality cannot be guaranteed by different RS configurations. In view of this, in the embodiment of the present invention, a method and a device for generating a pilot sequence and a pilot sequence are provided. In the solution, the base station notifies the UE of the pilot sequence generation parameter by using some signaling, and the UE performs the parameter according to the parameter. The generation of the RS-based sequence ensures that the UEs performing the multiplexed transmission use the same base sequence, and different RS configurations can be utilized to reduce mutual interference.

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

In the description process, the implementation from the UE and the base station side will be described separately, and the cooperation implementation of the two will be described at the same time, but this does not mean that the two must be implemented together. In fact, when the UE is implemented separately from the base station , which also solves on the UE side and the base station side, respectively. The problem with the above is that when the two are combined, they will get better technical effects.

In the technical solution provided by the embodiment of the present invention, the base station may indicate or specify the parameter RS ID used by the UE/UE group for generating the uplink and downlink pilot sequences by using certain signaling, that is, adopting a new pilot identifier (ID). It replaces the cell ID used in the generation of the pilot sequence in the prior art, thereby reducing the mutual interference of the RS between the UEs performing resource multiplexing. The scheme mainly has two modes of indication and agreement, which are respectively described below.

1. The manner in which the base station indicates the UE.

FIG. 3 is a schematic flowchart of a method for processing a base station side pilot sequence. As shown in the figure, when the indication is performed on the base station side, the following steps may be included:

Step 301: The base station determines a pilot identifier used by the pilot sequence of the user equipment UE or the UE group when generating.

Step 302: The base station indicates the pilot identifier of the UE or the UE group.

4 is a schematic flowchart of a method for processing a UE-side pilot sequence. As shown in the figure, correspondingly, when generating a pilot sequence on the UE side, the following steps may be included:

Step 401: The UE receives an indication of the base station, where the indication includes a pilot identifier used by the UE or the pilot sequence determined by the base station to generate the pilot sequence.

Step 402: The UE generates a pilot sequence according to the pilot identifier.

Specifically, the generating, by the UE, the pilot sequence according to the pilot identifier may include: when the pilot sequence is a downlink DMRS, CRS, or CSIRS, using the pilot flag instead of the serving cell ID or the scrambling sequence initialization value to generate a pilot. The scrambling sequence; the sequence identifier generates a pilot base sequence pattern and/or a frequency hopping pattern instead of the serving cell ID or the pattern initialization value.

The hopping pattern may include one of a sequence hopping pattern, a sequence group hopping pattern, a cyclic shift hopping pattern, or any combination.

In particular, the base sequence pattern, the sequence group hopping pattern, the sequence hopping pattern and the cyclic shift hopping pattern may be obtained by using the same pilot identifier, or may be obtained by the base station indicating different pilot identifiers. For example, a pilot sequence is used to obtain a base sequence pattern, a sequence group hopping pattern and a sequence hopping pattern, and another pilot flag is used to obtain a cyclic shift hopping pattern. After the sending, the base station uses the same sequence to receive, and may also be used after the base station generates the downlink pilot sequence to send, and the UE generates the same pilot sequence according to the pilot identifier to receive. The pilot identifier described in the embodiment may be an N_RS ID similar to a Cell ID, or may be an initialization value of a pilot sequence pattern or a hopping pattern.

It can be seen from the foregoing analysis that the reason why there is no orthogonality is because the Cell IDs used in generating the pilot sequences are different, resulting in different base sequences. Therefore, for UEs that are multiplexed, if orthogonality is to be guaranteed, they need to set their RS IDs (pilot flags) to be the same, generate the same base sequence, and then use different ports or cyclic shifts.

In the implementation, when the base station determines the pilot identifier used by the pilot sequence of the UE or the UE group, the base station may include:

The base station determines the pilot identifier used by the UE or the UE group when generating the pilot sequence; or, after performing joint scheduling of resources with the other base stations, the base station negotiates to determine the pilot identifier used by the UE or the UE group when generating the pilot sequence. .

Specifically, the base station may determine the RS ID parameter used by the UE to generate the pilot sequence, and may include at least the following methods:

1. The base station determines the RS ID parameter used by the UE to generate the pilot sequence.

2. After the base station and the base stations of other cells exchange information, determine the connection of the resources.

The RS ID parameter may be the pilot identifier itself used to generate the pilot sequence, or may be a mapping index that enables the UE or the UE group to obtain the pilot identifier used to generate the pilot sequence, and uses the RS ID parameter. This designation is to facilitate understanding by those skilled in the art and to make the full text clear.

It should also be noted that the existing RS ID can be replaced by the new RS ID (pilot ID), but the RS ID itself may not be the cell ID, and the cell ID is only a typical value.

Embodiments: It is assumed that the base stations of two cells interact with each other through the channel information, and determine that two UEs respectively belong to the two cells, occupy the same downlink physical resource for downlink transmission. In order to obtain the orthogonality of the downlink DMRS sequences between them, their RS IDs may be set to be the same, and the base station notifies the respective UEs, instead of the serving cell IDs for the DMRSs. The sequence is generated to obtain the same DMRS scrambling sequence. Then, through the information exchange between the two cell base stations, the two UEs are transmitted by using different DMRS ports, thereby obtaining orthogonality.

In an implementation, the pilot sequence may include one or a combination of the following pilot sequences: DMRS, SRS (Sounding Reference Signal), CSI-RS (channel state information reference signal), CRS (Common Reference Signal, Common Reference Signal).

Specifically, the pilot sequence in the implementation may include an uplink pilot sequence and/or a downlink pilot sequence, where:

1. The uplink pilot sequence may include one or more of the following: DMRS, SRS;

2. The downlink pilot sequence may include one or more of the following: CSI-RS, DMRS, CRS.

The following describes the specific indication mode on the base station side and the corresponding UE side processing mode. That is, the base station indicates, by using the high layer signaling or the PDCCH signaling, the processing manner of the RS ID parameter used by the UE or the UE group to generate the RS sequence.

The base station indicates the pilot identifier of the UE or the UE group, and may include:

1) The base station may indicate, by using the high layer signaling, a pilot identifier used by the UE or the UE group when generating the pilot sequence.

Correspondingly, when the indication is indicated by the base station by using the high layer signaling, the indication includes the pilot identifier used by the UE when generating the pilot sequence, and the UE may generate the pilot sequence according to the pilot identifier.

2) The base station may indicate, by using the high layer signaling, the UE or the UE group to obtain a mapping index of the pilot identifier used to generate the pilot sequence.

Correspondingly, when the indication is that the base station indicates by using the high layer signaling, the indication includes a mapping index of the pilot identifier used by the UE to generate the pilot sequence, and the UE may obtain the pilot identifier according to the mapping index, and generate a pilot. sequence.

3) The base station may indicate, by using the PDCCH signaling, the UE or the UE group to obtain a mapping index of the pilot identifier used to generate the pilot sequence.

Correspondingly, when the indication is that the base station indicates by using the PDCCH signaling, the indication includes a mapping index of the pilot identifier used by the UE to generate the pilot sequence, where the UE may A pilot sequence is generated after the pilot identifier is obtained according to the mapping index.

For the foregoing manners 2) and 3), when the base station indicates that the UE or the UE group obtains the mapping index of the pilot identifier used to generate the pilot sequence, the method further includes:

The base station and the UE or the UE group pre-arrange the mapping relationship between the mapping index and the pilot identifier, or notify the mapping relationship between the mapping index and the pilot identifier of the UE or the UE group through the high layer signaling, so that the UE or the UE group can be configured according to the UE or the UE group. The mapping index obtains a pilot identifier used to generate a pilot sequence.

For the foregoing mode 3), the base station, by using the PDCCH signaling, to indicate that the UE or the UE group obtains the mapping index of the pilot identifier used to generate the pilot sequence, may further include: the base station independently instructing the UE or the UE group to acquire the pilot sequence by using the PDCCH. The mapping index of the used pilot identifier is used; or the base station jointly encodes the mapping index of the pilot identifier used by the UE or the UE group to generate the pilot sequence and other indication information in the PDCCH, and then indicates to the UE or the UE group.

Correspondingly, the acquiring, by the UE, the pilot identifier according to the mapping index may include: determining, according to a mapping relationship between the mapping index and the pilot identifier pre-agreed by the base station and the UE or the UE group, the used pilot identifier;

Or, determining the pilot identifier used according to the mapping relationship between the mapping index and the pilot identifier notified by the base station through the high layer signaling.

Correspondingly, the UE receiving the indication that the base station performs the PDCCH signaling may further include:

The UE acquires a mapping index of a pilot identifier used by the base station to generate a pilot sequence independently indicated by the PDCCH; ^, , , , , ' I , , , , , , , , , ,

The indication information of the other indication information in the PDCCH is jointly encoded, and the mapping index of the pilot identifier used to generate the pilot sequence is obtained therefrom.

In the foregoing manner, the base station indicates, by using the high layer signaling, the RS ID or the RS ID configuration used by the UE/UE group to generate the RS sequence. The base station can directly indicate the RS ID of the UE through the high layer signaling, and can also indicate the RS through the high layer signaling. ID configuration. The RS IDs of different configurations can be pre-agreed or the UE can be notified through other high-level signaling.

The base station may also indicate, by using PDCCH signaling, the UE/UE group to use its RS sequence generation. RS ID configuration. The RS IDs corresponding to different configurations may be pre-agreed or notified to the UE by other higher layer signaling.

The RS ID is also the pilot identification itself used, and the RS ID configuration refers to the mapping index. Second, the way the base station and the UE agree.

In this mode, the UE obtains the RS ID used for the RS sequence generation according to the rules agreed with the base station.

FIG. 5 is a schematic diagram of a process implementation process of a pilot sequence, as shown in the figure, on the UE side and

/ or the base station side can generate the pilot sequence can include the following steps:

Step 501: Determine, according to a preset rule, a pilot identifier used when generating a pilot sequence. Step 502: Generate a pilot sequence according to the pilot identifier.

Specifically, generating the pilot sequence according to the pilot identifier may include:

When the pilot sequence is a downlink DMRS, a CRS, or a CSIRS, the pilot flag is used instead of the serving cell ID or the scrambling sequence initialization value to generate a pilot scrambling sequence; when the pilot replaces the serving cell ID or the pattern initialization value to generate a pilot Base sequence pattern and / or hopping pattern.

In implementation, the solution can be implemented on the base station or on the UE. As described above, the pilot sequence under implementation may include one of the following pilot sequences or a combination thereof: DMRS, SRS, CSI-RS, CRS.

In an implementation, the preset rule may include:

Calculating a pilot identifier used in generating a pilot sequence according to an agreed formula according to a cell ID of a serving cell and/or a coordinated cell of the UE;

Or, the pilot identifier used in generating the pilot sequence is obtained according to the group ID of the cooperative cluster where the UE is located.

Specifically, the base station can agree with the UE to have a fixed rule, and the UE obtains the RS ID used for generating the RS sequence according to the rule, and the base station does not need an additional signaling indication. The rules here can include:

According to the agreed formula, the cell ID of the serving cell and/or the coordinated cell of the UE Calculate the RSID used;

The RS ID is obtained according to the group ID of the collaboration cluster where the UE is located.

The following is an example to illustrate.

Example 1:

The base station directly indicates the RS ID used by the UE for generating the pilot sequence through the high layer signaling, or indicates the multiple RS IDs through the high layer signaling to select one of the RS ID values through the PDCCH signaling. When the UE generates the UL DMRS sequence, the base sequence and the cyclic shift value are obtained by using the ID instead of the cell ID. The specific sequence generation formula is as follows:

rPUSCH( _m . S _+fi ) _{= f} ( _? ) _W ^ where

Group number ^W= ^ ^{+ /s} J ^mC)d3() and

If group hopping is allowed + i) - 2') mod30 if group hopping is turned off

/ _S [ ^USCH = (N^ mod30 + A _ss ) mod30 where. ^Ε ^'υ^ is configured by the higher layer or the UE and the base station agree on a fixed s=0, and the pseudo-random sequence ^C (') is used at the beginning of each radio frame.

Initialization is performed to indicate the RSID of the UE to the UE.

Number within the group:

₌ ί ₅ ) If the sequence length is greater than or equal to 6PRB and the group hopping is turned off and the sequence hopping is turned on v = [0 other cases c(i)

Where a pseudo-random sequence is used at the beginning of each radio frame

Initialize ₍

In addition, its cyclic shift value: = 2^ _cs /l2

DMR3 卞^fi DMR3 + w _PN (n _s ) )modl2

Random sequence

Initialize at the beginning of each radio frame.

The RS ID indicated to the UE for the base station, instead of the location of the original Cell ID.

The base station may indicate that one ID is used for all the above formulas, and may also indicate that multiple IDs are used for different expressions, and the UE side calculates different expressions by using corresponding IDs. For example, the UE may obtain a base sequence pattern, a sequence group hopping pattern, and a sequence hopping pattern by using an RS ID indicated by the base station, and then obtain a cyclic shift hopping pattern by using another RS ID indicated by the base station.

Example 2:

The base station indicates, by using the PDCCH signaling, the RS ID configuration used by the UE to generate the pilot sequence, that is, the mapping relationship of the cell identifier used to generate the pilot sequence, which may be jointly encoded with other PDCCH signaling; Signaling its possible RS ID, the instructions are as follows:

The base station indicates, by means of the 1/2-bit high-layer signaling, the RS ID configuration used by the UE for generating the pilot sequence, that is, the mapping relationship of the cell identifier used to generate the pilot sequence, and the other possible high-level signaling to notify the possible RS. ID, the instructions are as follows: Finger bow 1 indication content

00 Use the cell m of the serving cell as Π

01 RS ID1 indicated by higher layer signaling

10 RS ID2 indicated by higher layer signaling

11 RS H« or indicator indication indicated by higher layer signaling

00 Use the cell of the service cell Π) as RS Π)

01 Use θΜΐφ Π) as Π)

10 RS ID1 indicated by higher layer signaling

11 Indicated by high-level signaling or

0 Use the cell of the serving cell Π) as the RS ID

I calculate its RS ID based on the cell count of its serving cell and/or cooperating cell

After receiving the indication index, the UE obtains the RS ID according to the indication index and then generates the pilot sequence. If the content is an RS ID indicated by the high layer signaling, the UE replaces the cell ID in the current generation scheme with the RS ID indicated by the high layer signaling to generate the pilot sequence. For example, when generating a downlink DMRS sequence with an RS ID, the formula is as follows: , r(m) = (l - 2 · c(2m + 1)1

O . , _f L2A^ ^DL - 1 normal cyclic p'efix

O .46A^ ^DL - 1 exteiKled cyclic prefix where RB is the maximum number of RBs in the downlink, pseudo-random sequence, initialized with the following formula:

3⁄4 = « 2" ₊ 1)·(2 ₊ 1)·2 ^1ΰ _{+ 3⁄4Ιϋ} s is the slot number and the ^ID is the RSID of the UE.

Example 3:

The base station indicates the RSID configuration used by the UE for its pilot sequence generation through 1/2-bit PDCCH signaling, and can notify the RSID corresponding to its possible different configurations through other high-layer signaling, as follows:

Or Means? Prime bow 1 indication content

0 Use the cell ID of the serving cell as the RSID

1 Calculate its RSID based on the cell ID of its serving cell and/or cooperating cell

After receiving the indication index, the UE obtains the RS ID according to the indication index and then generates the pilot sequence. If the indication content is that the cell ID of the serving cell is used as the RS ID, the method for generating the pilot sequence of the ij is the same as the current scheme. If only the content is the RS ID indicated by the high layer signaling, the UE replaces the cell ID in the current generation scheme with the RS ID indicated by the higher layer signaling to generate the pilot sequence.

Example 4:

The UE and the base station agree to calculate the used RS ID according to the predetermined formula according to the cell ID of the serving cell and the coordinated cell of the UE, and assume that the cell included in the cooperative cluster where the UE is located

The IDs are Cell_ID_l, Cell_ID_2 and Cell_ID_3, respectively, and the UE calculates the RS ID used according to the three cell IDs, as follows:

= {Celi_lD _\* Cell _ID _2* Cell _ID _3 + Cell _ID_\ + Cell _ID_2 + Cell_ID where N is the largest Cdl_ID and is 504 in the current standard.

Based on the same inventive concept, the base station and the user equipment are also provided in the embodiment of the present invention. Since the principle of solving the problem is similar to the processing method of a pilot sequence, the implementation of these devices can be referred to the implementation of the method, and the repetition is performed. No longer.

FIG. 6 is a schematic structural diagram of a base station, as shown in the figure, the base station may include:

a determining module 601, configured to determine a pilot identifier used by the pilot sequence of the UE or the UE group when generating;

The indication module 602 is configured to indicate the pilot identifier of the UE or the UE group.

In an implementation, the determining module may include: a first determining unit and/or a second determining unit, where:

a first determining unit, configured to determine a pilot identifier used by the UE or the UE group when generating the pilot sequence;

And a second determining unit, configured to determine, by the other base stations, the pilot identifier used by the UE or the UE group when generating the pilot sequence, after determining the joint scheduling of the resources. In an implementation, the determining module may be further configured to determine a pilot sequence including one or a combination of the following pilot sequences: DMRS, SRS, CSI-RS, CRS.

In an implementation, the indication module may include one or a combination of the following units: a first indication unit, configured to indicate, by using the high layer signaling, a pilot identifier used by the UE or the UE group when generating the pilot sequence;

a second indication unit, configured to indicate, by using the high layer signaling, that the UE or the UE group obtains a mapping index of a pilot identifier used to generate the pilot sequence;

And a third indication unit, configured to indicate, by using the PDCCH signaling, the mapping index of the pilot identifier used by the UE or the UE group to generate the pilot sequence.

In an implementation, the indication module may be further configured to pre-arrange the mapping relationship between the mapping index and the pilot identifier with the UE or the UE group when instructing the UE or the UE group to obtain the mapping index of the pilot identifier used to generate the pilot sequence, The mapping relationship between the mapping index and the pilot identifier of the UE or the UE group is notified by the high layer signaling, so that the UE or the UE group can obtain the pilot identifier used for generating the pilot sequence according to the mapping.

The third indicating unit is further configured to:

Determining, by the PDCCH, the mapping index of the pilot identifier used by the UE or the UE group to generate the pilot sequence; or

The other indication information in the PDCCH is jointly encoded and indicated to the UE or the UE group.

7 is a schematic structural diagram of a user equipment. As shown in the figure, the UE may include: a receiving module 701, configured to receive an indication of a base station, where the indication includes a pilot sequence of a UE or a UE group determined by a base station, used in generating Pilot identification;

The generating module 702 is configured to generate a pilot sequence according to the pilot identifier.

In an implementation, the generating module may be further configured to generate a pilot sequence including one or a combination of the following pilot sequences: DMRS, SRS, CSI-RS, CRS.

In an implementation, the generating module may include one or a combination of the following units: The first generating unit is configured to: when the indication is that the base station indicates by using high layer signaling, where the indication includes a guide used by the UE when generating the pilot sequence. When the frequency is identified, a pilot sequence is generated according to the pilot identifier;

a second generating unit, configured to: when the indication is that the base station performs indication by using high layer signaling When the indication includes the mapping index of the pilot identifier used by the UE to generate the pilot sequence, the pilot sequence is obtained according to the mapping, and the pilot sequence is generated.

a third generating unit, configured to: when the indication is that the base station indicates by using the PDCCH signaling, where the indication includes the mapping index of the pilot identifier used by the UE to generate the pilot sequence, after acquiring the pilot identifier according to the mapping index, Generate a pilot sequence.

In an implementation, the generating module may be further configured to determine, according to a mapping relationship between the mapping index and the pilot identifier pre-agreed by the base station and the UE or the UE group, the pilot identifier used when acquiring the pilot identifier according to the mapping index; or The pilot identifier used is determined according to the mapping relationship between the mapping index and the pilot identifier notified by the base station through the high layer signaling.

The third generating unit is further configured to:

Obtaining a mapping index of a pilot identifier used by the base station to generate a pilot sequence independently indicated by the PDCCH; or

The receiving base station combines the mapping index of the pilot identifier used for generating the pilot sequence with the other indication information in the PDCCH, and obtains a mapping index of the pilot identifier used to generate the pilot sequence.

Generate modules, further used to:

When the pilot sequence is a downlink DMRS, a CRS, or a CSIRS, the pilot flag is used instead of the serving cell ID or the scrambling sequence initialization value to generate a pilot scrambling sequence; the sequence identifier generates a pilot instead of the serving cell ID or the pattern initialization value. Base sequence pattern and / or hopping pattern.

The frequency hopping pattern includes one or any combination of the following:

Sequence hopping pattern;

Sequence group hopping pattern;

Cyclic shift hopping pattern.

FIG. 8 is a schematic structural diagram of a processing device of a pilot sequence. As shown in the figure, the device may include:

a determining module 801, configured to determine, according to a preset rule, a pilot identifier used when generating a pilot sequence;

The generating module 802 is configured to generate a pilot sequence according to the pilot identifier. In an implementation, the processing device of the pilot sequence may be located at the base station or at the UE. In an implementation, the generating module may be further configured to generate a pilot sequence including one or a combination of the following pilot sequences: DMRS, SRS, CSI-RS, CRS.

In an implementation, the determining module may be further configured to determine a pilot identifier used in generating the pilot sequence according to the following preset rules:

Calculating a pilot identifier used when generating a pilot sequence according to an agreed formula according to a cell ID of a serving cell and/or a coordinated cell of the UE; or obtaining a guide used when generating a pilot sequence according to a group ID of a cooperative cluster where the UE is located; Frequency identification.

The generating module is further configured to:

The frequency hopping pattern includes one of the following hopping patterns or a combination thereof:

Sequence hopping pattern;

Sequence group hopping pattern;

Cyclic shift hopping pattern.

For convenience of description, the various parts of the above described devices are described in terms of functions divided into various modules or units. Of course, the functions of the various modules or units may be implemented in one or more software or hardware in the practice of the invention.

It can be seen that, in the technical solution provided by the embodiment of the present invention, the base station indicates the parameter RS ID used by the UE/UE group to generate the pilot sequence, which is used to replace the cell ID used in the sequence generation in the prior art. The mutual interference of the inter-UE RSs for resource multiplexing is reduced. specific:

The base station may indicate the RS ID or RS ID configuration used by the RS sequence generation through high layer signaling;

The base station may indicate the RS ID configuration used by the RS sequence generation by using the PDCCH signaling; the UE may obtain the RS used for the RS sequence generation according to the rules agreed with the base station.

ID. Obviously, the technical solution provided by the embodiment of the present invention can be scheduled for resource multiplexing.

The UE adopts the same RS-based sequence, so that different RS configurations are used to ensure RS orthogonality between UEs, thereby improving channel estimation performance; and signaling overhead is small and configuration is flexible.

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 flowcharts and/or block diagrams, and combinations of flow and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device to produce a machine for generating 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.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the art that, Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and It is within the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

A method for processing a pilot sequence, comprising the steps of: determining, by a base station, a pilot identifier used by a pilot sequence of a user equipment UE or a group of UEs when generating;

The base station indicates the pilot identity of the UE or the UE group.

The method according to claim 1, wherein the base station determines the pilot identifier used by the pilot sequence of the UE or the UE group to generate, including:

3. The method according to claim 1, wherein the pilot sequence comprises one or a combination of the following pilot sequences: a demodulation reference signal DMRS, a channel sounding reference signal SRS, a channel state information reference signal CSI-RS, Common reference signal CRS.

The method according to any one of claims 1 to 3, wherein the base station indicates the pilot identifier of the UE or the UE group, including:

The base station indicates, by using the high layer signaling, a pilot identifier used by the UE or the UE group when generating the pilot sequence;

The base station indicates, by using the high layer signaling, the UE or the UE group to obtain a mapping index of the pilot identifier used to generate the pilot sequence;

The base station indicates, by using the physical downlink control channel PDCCH signaling, the mapping index of the pilot identifier used by the UE or the UE group to generate the pilot sequence.

The method according to claim 4, wherein the base station instructs the UE or the base station to pre-agreed the mapping relationship between the mapping index and the pilot identifier with the UE or the UE group, or notifies the UE or the UE group by using high layer signaling. The mapping relationship between the mapping index and the pilot identifier, so that the UE or the UE group can obtain the pilot identifier used to generate the pilot sequence according to the mapping index.

6. The method of claim 4, wherein the base station passes the PDCCH signal Further includes:

The eNB independently indicates that the UE or the UE group obtains the mapping index of the pilot identifier used to generate the pilot sequence, or the UE and the UE group are jointly coded with other indication information in the PDCCH.

A method for processing a pilot sequence, comprising the steps of: receiving, by an UE, an indication of a base station, where the indication includes a pilot identifier used by a base station to determine a pilot sequence of a UE or a UE group;

The UE generates a pilot sequence according to the pilot identifier.

8. The method according to claim 7, wherein the pilot sequence comprises one or a combination of the following pilot sequences: DMRS, SRS, CSI-RS, CRS.

9. The method of claim 7 or 8, wherein

The indication is that the base station indicates by using the high layer signaling, where the indication includes a pilot identifier used by the UE when generating the pilot sequence, and the UE generates a pilot sequence according to the pilot identifier; the indication is that the base station passes the upper layer. The signaling indicates that the indication includes a mapping index of the pilot identifier used by the UE to generate a pilot sequence, and the UE generates a pilot sequence according to the mapping index to generate a pilot sequence.

The indication is that the base station indicates by using the PDCCH signaling, and the indication includes the mapping index of the pilot identifier used by the UE to generate the pilot sequence, and the UE generates the pilot sequence according to the mapping index to generate the pilot sequence.

The method according to claim 9, wherein the UE obtains the pilot identifier according to the mapping index, and the method includes:

Determining, according to a mapping relationship between the mapping index and the pilot identifier pre-agreed by the base station and the UE or the UE group, the used pilot identifier;

11. The method according to claim 9, wherein the UE receives the base station and passes The indication performed by the PDCCH signaling further includes:

Obtaining, by the UE, a mapping index of a pilot identifier used by the base station to generate a pilot sequence independently indicated by the PDCCH; or

The method according to claim 7, wherein the UE generates a pilot sequence according to the pilot identifier, which specifically includes:

13. The method according to claim 12, wherein the frequency hopping pattern comprises one or any combination of the following:

Sequence hopping pattern;

Sequence group hopping pattern;

Cyclic shift hopping pattern.

A method for processing a pilot sequence, comprising the steps of: determining, according to a preset rule, a pilot identifier used when generating a pilot sequence;

A pilot sequence is generated based on the pilot identification.

15. The method of claim 14, wherein the pilot sequence comprises one or a combination of the following pilot sequences: DMRS, SRS, CSI-RS, CRS.

The method according to claim 14 or 15, wherein the preset rule comprises:

Calculating a pilot identifier used in generating a pilot sequence according to an agreed formula according to a cell identifier of the serving cell and/or the coordinated cell of the UE;

Or, the pilot identifier used in generating the pilot sequence is obtained according to the group identifier group ID of the cooperative cluster where the UE is located.

The method of claim 14, the generating the pilot sequence according to the pilot identifier, specifically:

18. The method of claim 17, the hopping pattern comprising one or a combination of the following hopping patterns:

Sequence hopping pattern;

Sequence group hopping pattern;

Cyclic shift hopping pattern.

19. A base station, comprising:

The base station according to claim 19, wherein the determining module comprises: a first determining unit and/or a second determining unit, wherein:

The second determining unit is configured to, after performing joint scheduling of resources with other base stations, negotiate to determine a pilot identifier used by the UE or the UE group to generate a pilot sequence.

The base station according to claim 19 or 20, wherein the indication module comprises one or a combination of the following units:

a first indication unit, configured to indicate, by using the high layer signaling, a pilot identifier used by the UE or the UE group when generating the pilot sequence;

a third indication unit, configured to indicate, by using PDCCH signaling, that the UE or the UE group acquires a The mapping index of the pilot identifier used by the pilot sequence.

The base station according to claim 21, wherein the indication module is further configured to pre-agreed with the UE or the UE group when instructing the UE or the UE group to obtain a mapping index of the pilot identifier used to generate the pilot sequence. The mapping relationship between the mapping index and the pilot identifier, or the mapping relationship between the mapping index and the pilot identifier of the UE or the UE group is notified by the high layer signaling, so that the UE or the UE group can obtain the pilot sequence generated according to the mapping index. Pilot ID.

The base station according to claim 21, wherein the third indicating unit is further used to:

24. A user equipment, comprising:

The user equipment according to claim 24, wherein the generating module comprises one or a combination of the following units:

a first generating unit, configured to: when the indication is that the base station indicates by using the high layer signaling, where the indication includes a pilot identifier used by the UE when generating the pilot sequence, generating a pilot sequence according to the pilot identifier;

a second generating unit, configured to: when the indication is that the base station indicates by using the high layer signaling, obtain a pilot sequence according to the mapping, and generate a pilot sequence;

26. The user equipment according to claim 25, wherein the generating module enters The step of determining, according to the mapping relationship between the mapping index and the pilot identifier pre-agreed by the base station and the UE or the UE group, determining the used pilot identifier when acquiring the pilot identifier according to the mapping index; or The mapping relationship between the mapping index and the pilot identifier determines the pilot identifier used.

27. The method of claim 25, wherein the third generating unit is further used to:

28. The method of claim 24, wherein the generating module is further used to:

The method according to claim 28, wherein the frequency hopping pattern comprises one or any combination of the following:

Sequence hopping pattern;

Sequence group hopping pattern;

Cyclic shift hopping pattern.

30. A processing device for a pilot sequence, comprising:

a determining module, configured to determine, according to a preset rule, a pilot identifier used in generating a pilot sequence;

31. The device according to claim 30, wherein the determining module is further configured to determine a pilot identifier used when generating the pilot sequence according to the following preset rule: Calculating a pilot identifier used when generating a pilot sequence according to an agreed formula according to a cell ID of a serving cell and/or a coordinated cell of the UE; or obtaining a guide used when generating a pilot sequence according to a group ID of a cooperative cluster where the UE is located; Frequency identification.

The method of claim 30, the generating module, further configured to: when the pilot sequence is a downlink DMRS, a CRS, or a CSIRS, replace the serving cell ID or the scrambling sequence initialization value with the pilot flag Generating a pilot scrambling sequence; the sequence identifier generates a pilot base sequence pattern and/or a frequency hopping pattern instead of the serving cell ID or the pattern initialization value.

33. The method of claim 32, the hopping pattern comprising one or a combination of the following hopping patterns:

Sequence hopping pattern;

Sequence group hopping pattern;

Cyclic shift hopping pattern.