WO2012155506A1

WO2012155506A1 - Method and base station for interacting the information of uplink demodulation reference signal among cells

Info

Publication number: WO2012155506A1
Application number: PCT/CN2011/084123
Authority: WO
Inventors: 王瑜新; 夏树强
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-08-15
Filing date: 2011-12-16
Publication date: 2012-11-22
Also published as: CN102427396A

Abstract

The present invention provides a method and a base station for interacting the information of uplink demodulation reference signal among cells. The method comprises: the base station sending the message to the base station of the neighboring cell, wherein the message containing the resource occupation information and/or parameter configuration information of the uplink demodulation reference signal (DMRS). Said method of interacting the information in the present invention enables indicating the parameter of the demodulation reference signal, so as to achieve the transmission demand of the uplink CoMP. The problem that the uplink data of CoMP user equipment (UE) can not be received correctly by the base station in the coordinated cell in the related technique can thus be resolved, and the performance of the uplink CoMP system can be improved.

Description

Information interaction method and base station for inter-cell uplink demodulation reference signal

Technical field

The present invention relates to the field of communications, and in particular, to an information exchange method and a base station for inter-cell uplink demodulation reference signals.

Background technique

In the Long Term Evolution (LTE) system of the 3rd generation partner, the 3rd Generation Partnership Project (3GPP), the user equipment is controlled by centralized scheduling of the base station (User Equipment). , referred to as UE), the Physical Uplink Shared Channel (PUSCH) transmission.

The uplink scheduling information (UPlink Scheduling Information) of the PUSCH is sent by the base station to the target UE through a Physical Downlink Control Channel (PDCCH). The uplink scheduling information includes: resource allocation related to the physical uplink shared channel, modulation and coding scheme, and cyclic shift (Cyclic Shift) of the Demodulation Reference Signal (DMRS).

In the LTE system, the physical uplink shared channel is transmitted by a single antenna port. A system frame (frame) contains 10 subframes, each of which contains 2 slots. Figure 1 is a schematic illustration of a cyclic prefix in a time slot according to the associated technique. As shown in Figure 1, for a normal cyclic prefix (Normal CP), each time slot consists of 6 data symbols and 1 demodulation reference signal; for extended cyclic prefix (referred to as extended cyclic prefix) For Extended CP), each time slot consists of 5 data symbols and 1 demodulation reference signal.

The demodulation reference signal DM RS consists of a sequence in the frequency domain which is a cyclic shift of the reference signal sequence. In order to randomize the inter-cell interference, the reference signal sequence of the demodulation reference signal may implement a sequence-based sequence hopping or a group hopping according to the configuration of the base station, which is also called a slot hopping. Turn the SGH way. That is, according to the configuration of the base station, the demodulation reference signals of one user equipment in two time slots in one subframe are different, and vary with the time slot in one system frame according to a certain jump pattern. In the time slot „, the cyclic shift amount of the demodulation reference signal is: α = 1πη"1 , where " _∞ = ("S« _s + L _s + " _PRS (" _s )) mod l2. Within a radio frame, " _x = 0, 1, ..., 19;" _s is configured by the higher layer parameters, and _s is configured by the uplink scheduling information. Generated by a pseudo-random generator, specifically expressed as "PRS (n _s ) = ^. ₌₀ c(8N _s 3⁄4 · ^ + 0 · 2''. The uplink scheduling information is carried on the physical downlink control channel with certain downlink control. Information format

(Downlink Control Information Format, DCI format for short) is sent by the base station to the target user equipment. In the LTE system, the downlink control information format is divided into the following types: DCI format O, 1, 1A, 1B, 1C, 1D, 2, 2A, 3, 3A, etc., where DCI format 0 contains uplink scheduling information, and is used for Indicates the scheduling of the physical uplink shared channel PUSCH.

The LTE-Advanced system (referred to as LTE-A system) is a next-generation evolution system of the LTE system. In the LTE-A system, the physical uplink shared channel can be transmitted using a single antenna port or multi-antenna port. 2 is a schematic diagram of a baseband signal processing of a physical uplink shared channel transmitted by a multi-antenna port according to the related art in an LTE-A system. As shown in FIG. 2, when multi-antenna port transmission is performed, LTE-A system support is based on One or two codewords (CW) are spatially multiplexed, and each codeword corresponds to one transport block (Transport Block, TB for short). Codewords To further map to layers, each codeword is mapped to one or two layers of data.

FIG. 3 is a schematic diagram of precoding of an LTE-A system according to the related art, as shown in FIG.

LTE-A uses a precoding technique based on a codebook (codebook), which is a type of channel status information (CSI). Techniques for performing pre-processing to improve the performance of multi-antenna systems. One way for the transmitter to acquire CSI is through feedback from the receiver. In order to reduce the feedback overhead, the general method is to save the same codebook at the receiving end and the transmitting end. The receiving end selects a suitable precoding matrix in the codebook according to the current channel condition, and feeds back its index value (PMI) in the set back to the transmitting end, and the transmitting end finds according to the feedback precoding matrix index. Precoding the matrix and precoding the transmitted signal. The mathematical model of data precoding is y = H^ + " , where y is the received signal vector, H is the channel coefficient matrix, W is the precoding matrix, s is the signal vector, and n is the noise vector.

In the LTE-A system, when the physical uplink shared channel is transmitted by using multiple antenna ports, the demodulation reference signals of each layer of data are precoded in the same manner as the data of each layer. Demodulation reference signals for different layer data, Includes demodulation reference signals for multi-layer data of the same user equipment for single-user multiple-input multiple-output system (SU-MIMO), and multi-user multiple-input multiple-output system (MU-MIMO) solution for multi-layer data of multiple user equipments To adjust the reference signal by orthogonalization using different demodulation reference signal cyclic shift (CS) and/or Orthogonal Cover Code (OCC) to distinguish different layer data of user space multiplexing or Differentiate between different users. The orthogonal mask OCC is [+1, +1] and [+1, -1], and acts on the demodulation reference signal on two slots (Slot) in one subframe (Subframe).

Currently, in the standard version developed by 3GPP, the LTE standard version is Release 8 and Release 9 and the LTE-A standard is Release 10 (Release 10), respectively abbreviated as Rel -8, Rel-9 and Rel-10, LTE-A standards may also include subsequent versions, such as Rel-l. In the current Rel-10 version, the base station can indicate the cyclic shift/OCC information of the demodulation reference signal for the scheduled PUSCH through DCI format 0 and DCI format 4, as shown in Table 1. Upward correlation DCI format cyclic shift region sum W - , ""

When the orthogonal reference mask is used to orthogonalize the demodulation reference signal, the base station needs to jointly detect the demodulation reference signals on the two slots in one subframe, thus requiring one user equipment to be in two subframes. The demodulation reference signal on the slot must be the same. In this case, the SGH method of slot jump in the LTE system cannot be used. However, in order to randomize inter-cell interference as much as possible, a SGH method of sub-frame jump is proposed in the related art. That is, according to the configuration of the base station, the demodulation reference signals of one user equipment in two slots in one subframe are the same, and the demodulation reference signals on each subframe in a system frame are different, according to a certain The jump pattern changes with the sub-frame within one system frame.

Coordinated Multi-Point (CoMP) transmission technology utilizes multiple small The transmit antennas of the area are cooperatively transmitted to achieve higher capacity and reliable transmission of the wireless link at the cell edge, which can effectively solve the problem of cell edge interference. 4 is a schematic diagram of downlink coordinated multi-point transmission according to the related art. As shown in FIG. 4, downlink CoMP can be classified into two types: Joint Processing/Joint Transmission (JP/JT for short) and cooperative scheduling. /Coordinated Scheduling/Beamforming (CS/CB for short). In JT, data is simultaneously transmitted from multiple cells, and the transmission data, scheduling, and channel state information are only exchanged between multiple transmission points in the cooperation set; in CS/CB, only the serving cell sends data to the UE, Scheduling and Beamforming information interact in a CoMP collaboration set. Different cells participating in the transmission or cooperation form a cooperation set. For a certain UE, one cell in the cooperation set is a serving cell, and the remaining cells are coordinated cells.

5 is a schematic diagram of uplink cooperative multi-point transmission according to the related art. As shown in FIG. 5, UE1 sends data to a base station of a serving cell and a coordinated cell, and the base station of the coordinated cell sends the received data to the UE1 through the X2 interface. The base station of the associated serving cell performs combined reception processing. In order to enable the base station of the coordinated cell to correctly receive the data of the UE1, the base station of the coordinated cell needs to know the configuration parameter information of the uplink DMRS sent by the UE1, so that the base station of the coordinated cell can perform channel estimation on the DMRS, thereby correctly receiving the sent by the UE. data.

For the related art, how to make the base station of the coordinated cell perform channel estimation on the DMRS of the uplink CoMP UE, so that the base station of the coordinated cell can correctly receive the data of the UE, has not yet provided an effective solution.

Summary of the invention

A main object of the present invention is to provide an interaction method and a base station for information of an inter-cell uplink measurement reference signal, so as to at least solve the problem that a base station of a coordinated cell in the related art fails to correctly receive uplink CoMP UE data.

In order to solve the above problem, the present invention provides an information interaction method for an inter-cell uplink demodulation reference signal, including:

The base station sends a message to the neighboring cell base station, where the message includes resource occupation information and/or parameter configuration information of the uplink demodulation reference signal (DMRS). The message is a load information message or a message for interactive coordinated multi-point (CoMP) information. The resource occupation information and/or parameter configuration information of the uplink DMRS includes at least one of the following information: cyclic shift region information of an uplink related downlink control information format (DCI format), cyclic shift information of a high layer signaling configuration, and physical uplink Shared channel (PUSCH) group allocation information A _ss , group hopping enable indication, sequence hopping enable indication, sequence group hopping non-enable indication, orthogonal mask (OCC) enable indication of DMRS, frequency domain Start position, DMRS sequence length, frequency domain resource occupancy indication, and DMRS spatial multiplexing layer.

The resource occupation information and/or parameter configuration information of the uplink DMRS is represented by an information element of the X2 interface.

In the information element, the bit character is used to indicate the DMRS frequency domain resource occupation information on each physical resource block (PRB), and each bit corresponds to whether there is an uplink DMRS on one PRB.

In the information element, the OTC occupation information of the DMRS on each PRB is represented by a bit character, and each bit corresponds to the OCC occupation information of the DMRS on one PRB; or, the DMRS of each user is represented by an enumeration character or an integer character. OCC occupancy information, different enumeration values or integer values indicate the use of different OCCs.

In the information element, an enumerated character or an integer character is used to indicate designation information of each user, and different enumeration values or integer values indicate that the specified information is different;

The specified information is cyclic shift region information of an uplink related DCI format of the DMRS, or cyclic shift information of a high layer signaling configuration of the DMRS, or group allocation information A _ss of the PUSCH of the DMRS, or a DMRS spatial multiplexing layer, Or the DMRS frequency domain start position of each user, or the DMRS sequence length, or the group hopping enable indication or the sequence hopping enable indication or the sequence group hopping non-enable indication.

The base station is any base station in the cooperative set, and the neighboring cell base station is another base station except the base station in the cooperation set; or the base station is a base station of the serving cell in the cooperation set, the phase The neighboring cell base station is a base station that cooperates with the coordinated cell.

The invention also provides a base station, comprising:

Setting module: configured to generate a message including resource occupancy information and/or parameter configuration information of an uplink demodulation reference signal (DMRS);

Transmitting module: It is arranged to send the message to a neighboring cell base station of the base station. The message is a load information message or a message for interactive coordinated multi-point (CoMP) information. The resource occupation information and/or parameter configuration information of the uplink DMRS includes at least one of the following information: cyclic shift region information of an uplink related downlink control information format (DCI format), cyclic shift information of a high layer signaling configuration, and physical uplink Shared channel (PUSCH) group allocation information A _ss , group hopping enable indication, sequence hopping enable indication, sequence group hopping non-enable indication, orthogonal mask (OCC) enable indication of DMRS, frequency domain Start position, DMRS sequence length, frequency domain resource occupancy indication, and DMRS spatial multiplexing layer.

The setting module is further configured to use the information element of the X2 interface to represent resource occupation information and/or parameter configuration information of the uplink DMRS.

The setting module is configured to represent resource occupation information and/or parameter configuration information of the uplink DMRS by: in the information element, using bit characters to represent each physical resource block.

DMRS frequency domain resource occupation information on (PRB), and each bit corresponds to whether there is an uplink DMRS on one PRB.

The setting module is configured to indicate resource occupation information and/or parameter configuration information of the uplink DMRS by: in the information element, using bit characters to represent OCC occupancy information of each DMRS on each PRB, each bit Corresponding to the OCC occupation information of the DMRS on one PRB; or, the enumeration character or integer character is used to indicate the OCC occupation information of each user's DMRS, and different enumeration values or integer values indicate that different OCCs are used.

The setting module is configured to represent resource occupation information and/or parameter configuration information of the uplink DMRS by using: an enumerated character or an integer character to represent specified information of each user, different An enumeration value or an integer value indicates that the specified information is different;

The base station is any base station in the cooperation set, or the base station is a base station of the service cell in the cooperation set.

An information interaction method for inter-cell uplink demodulation reference signals in the CoMP system of the present invention, The parameters of the demodulation reference signal can be instructed to meet the requirements of the uplink CoMP transmission, and the problem that the base station of the coordinated cell in the related art fails to correctly receive the uplink CoMP UE data is solved, and the performance of the uplink CoMP system is improved. BRIEF abstract

The drawings are intended to provide a further understanding of the invention, and are intended to be illustrative of the invention. In the drawing:

1 is a schematic diagram of a cyclic prefix in one slot according to the related art;

2 is a schematic diagram of a baseband signal processing of a transmitting end of a physical uplink shared channel transmitted by a multi-antenna port in an LTE-A system according to the related art;

3 is a schematic diagram of precoding of an LTE-A system according to the related art;

4 is a schematic diagram of downlink coordinated multipoint transmission according to the related art;

FIG. 5 is a schematic diagram of uplink coordinated multipoint transmission according to the related art; FIG.

6 is a flowchart of an information interaction method for an inter-cell uplink demodulation reference signal according to an embodiment of the present invention; and FIG. 7 is a block diagram of a base station according to an embodiment of the present invention. Preferred embodiment of the invention

In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be arbitrarily combined with each other.

In order to achieve the above object, according to an aspect of the present invention, a method for interacting information of an inter-cell uplink measurement reference signal is provided, including the following steps: The base station sends a message to a base station of a neighboring cell, where the message includes an uplink. Resource occupancy information and/or parameter configuration information of the DMRS.

Preferably, the above message is a load information message or a message for interacting with CoMP information.

Preferably, the resource occupation information and/or parameter configuration information of the uplink DMRS is resource occupation information and/or parameter configuration information of the uplink CoMP DMRS. That is, the DMRS that interacts between base stations at this time The information is the DMRS information of the user of the uplink CoMP transmission.

Preferably, the resource occupation information and/or parameter configuration information of the uplink DMRS includes at least one of the following information: cyclic shift region information of the uplink related DCI format, cyclic shift information of the high layer signaling configuration, and group allocation information of the PUSCH A _ss , group frequency hopping enable indication, sequence frequency hopping enable indication, sequence group hopping failure enable indication, OCRS OCC enable indication, frequency domain start position, DMRS sequence length, frequency domain resource occupation indication, and DMRS space The number of layers to be multiplexed.

Preferably, the method further includes: before the base station sends a message to the base station of the neighboring cell, the information element of the uplink DMRS is set by the message of the X2 interface to indicate resource occupation information and/or parameter configuration information of the uplink DMRS.

Preferably, setting the information element of the uplink DMRS by using the message of the X2 interface to indicate the resource occupation information and/or the parameter configuration information of the uplink DMRS includes at least one of the following ways:

(1) Use BIT STRING to indicate DMRS frequency domain resource occupation information on each PRB (Physical Resource Block), where each bit corresponds to one PRB, and each bit is 0. And 1 respectively indicate whether there is an uplink CoMP DMRS on this PRB.

(2) The OTC occupation information of the DMRS on each PRB is represented by a bit character, wherein each bit corresponds to one PRB, and each bit represents 0 and 1 respectively using different OCCs; or, The ENUMERATE or integer character (INTEGER) indicates the OCC occupancy information of each user's DMRS, where different enumeration values or integer values indicate that different OCCs are used.

(3) using an enumerated character or an integer character to represent the cyclic shift region information of the uplink related DCI format of each user's DMRS, wherein different enumeration values or integer values represent loops using different uplink related DCI formats. Shift area information.

(4) using an enumerated character or an integer character to represent cyclic shift information of a high-level signaling configuration of each user's DMRS, wherein different enumeration values or integer values represent cyclic shifts using different higher layer signaling configurations Bit information.

(5) using the enumerated character or integer character to represent the group allocation information A _ss of the PUSCH of each user's DMRS, wherein different enumeration values or integer values indicate components using different PUSCHs With the information A _ss .

(6) The number of DMRS spatial multiplexing layers for each user is represented by an enumerated character or an integer character, wherein different enumeration values or integer values indicate that different DMRS spatial multiplexing layers are used.

(7) The enumeration character or integer character is used to indicate the start position of the DMRS frequency domain of each user, wherein different enumeration values or integer values indicate that different DMRS frequency domain start positions are used.

(8) The length of each user's DMRS sequence is represented by an enumerated character or an integer character, wherein different enumeration values or integer values indicate that different DMRS sequence lengths are used.

(9) using an enumerated character or an integer character or a bit character to indicate a group hopping enable indication or a sequence hopping enable indication or a sequence group hopping unactivating indication for each user, wherein different enumeration values Or an integer value indicates whether the group hopping is enabled or the sequence hopping is enabled or the sequence group hopping is not enabled.

Preferably, the base station is a base station of any cell in the cooperation set, and the neighboring cell base station is a coordinated cell base station in cooperation; or the base station is a base station of a serving cell, and the neighboring cell is a coordinated set. Base stations of other cells.

According to the present invention, the base station transmits a message including resource occupation information and/or parameter configuration information of the uplink DMRS to the base station of the neighboring cell, and the base station receiving the message according to the resource occupation information and/or parameter configuration information of the uplink DMRS. Channel estimation is performed on the DMRS of the uplink CoMP UE, so that correct data reception is performed, and the problem that the base station of the coordinated cell in the related art fails to correctly receive the uplink CoMP UE data is solved, and the system performance is improved.

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

Embodiment 1

The embodiment provides an interaction method for the information of the inter-cell uplink measurement reference signal. The resource occupation information and/or parameter configuration information of the uplink CoMP DMRS is exchanged, and the base station that receives the message according to the resource occupation information of the uplink DMRS and/or Or the parameter configuration information performs channel estimation on the DMRS of the uplink CoMP UE, thereby performing correct data reception, and solving the small cooperation in the related art. The problem that the base station of the area fails to correctly receive the uplink CoMP UE data improves the transmission performance of the uplink CoMP system.

As shown in FIG. 6, the information interaction method of the inter-cell uplink demodulation reference signal in the CoMP system of this embodiment includes:

Step 602: The base station sends a message to the base station of the neighboring cell, where the message includes the uplink CoMP.

Resource occupancy information and/or parameter configuration information of the DMRS;

The above message may be a LOAD INFORMATION message or a message for interworking CoMP information.

Step 604: The base station that receives the message determines the scheduling policy of the current cell according to the received resource occupation information and/or parameter configuration information of the uplink DMRS, and/or performs channel estimation on the DMRS of the uplink CoMP UE, so as to perform correct Data reception.

The scheduling policy includes: when the base station receives the resource occupation information of the uplink DMRS, try to avoid scheduling users at the cell edge on the corresponding PRB.

Taking the CoMP system as an example, the above information interaction method may include the following steps:

Step 1 In the CoMP system, the base stations of each cell in the cooperation set send resource occupation information and/or parameter configuration information of the uplink CoMP DMRS to the base station of the coordinated cell.

Preferably, a new IE item on the X2 interface is defined: an uplink DMRS Indication (indication), the new IE item is used to indicate resource occupation information and/or parameter configuration information of the uplink CoMP DMRS. The LOAD INFORMATION message or the message for interchanging CoMP information uses the uplink DMRS indication IE item to indicate resource occupation information and/or parameter configuration information of the DMRS of each uplink CoMP user.

Step 2: Each base station determines a scheduling policy of the local cell according to the received resource occupation information and/or parameter configuration information (that is, when the base station receives the uplink CoMP resource occupation information, try to avoid the corresponding PRB. The user at the cell edge is scheduled to be) and/or the DMRS of the uplink CoMP UE is channel estimated to perform correct data reception.

The IE format used by the foregoing uplink DMRS indication IE item may be the following preferred implementation manner: Preferred embodiment one:

Byte STRING indicates the DMRS frequency domain resource occupation information on each PRB, where each bit corresponds to one PRB. On each bit, 0 and 1 respectively indicate whether there is an uplink CoMP DMRS on the PRB. For example, 1 indicates that there is an uplink CoMP DMRS, and 0 indicates that there is no uplink CoMP DMRS. Of course, 0 indicates that there is an uplink CoMP DMRS, and 1 indicates that there is no uplink CoMP DMRS, as shown in Table 2 below.

Frequency domain resource occupation information indication of uplink DMRS 1

Preferred Embodiment 2:

Each bit in the bit character corresponds to the OCC occupation information of the DMRS on one PRB, that is, the first bit corresponds to PRB0, the second bit corresponds to PRB 1, and so on. If each bit in the bit character has a value of "1", it means use OCC [1 -1], a value of "0" means use OCC [1 1], or a value of "0", which means use OCC [1 -1] ], a value of "1" indicates the use of OCC [1 1] as shown in Table 3 below.

Table 3 OCC physical resource block occupation indication of uplink DMRS 1

Indicates the value of using OCC [1 -1]

"0" means use OCC [1 1] or to indicate that this user does not occupy the PRB; the maximum number of physical resource blocks is

110.

Alternatively, use an enumerated character (ENUMERATE) or an integer character (INTEGER) to indicate the OCC occupancy information of each user's DMRS, where different enumeration values or integer values indicate the use of different OCCs.

OCC physical resource block occupation indication of uplink DMRS 2

Preferred Embodiment 3:

枚Use the enumerated character (ENUMERATE) or the integer character (INTEGER) to represent the cyclic shift region information of the uplink related DCI format of each user's DMRS, wherein different enumeration values or integer values indicate different uplink related DCIs are used. The cyclic shift region information of the format.

Uplink DMRS uplink related DCI format cyclic shift region information

The above (0, 1 , 2, 3, 4, 5, 6, 7 ) represents the range of values of the cyclic shift. Preferred Embodiment 4:

The enumeration character or integer character is used to represent the cyclic shift information of the high layer signaling configuration of each user's DMRS, wherein different enumeration values or integer values represent cyclic shift information configured using different higher layer signaling.

Table 6: Cyclic shift information of the upper layer signaling configuration of the uplink DMRS

Preferred Embodiment 5:

The group allocation information A _ss of the PUSCH of each user's DMRS is represented by an enumerated character or an integer character, wherein different enumeration values or integer values represent group allocation information using different PUSCHs.

Table 7 Group allocation information of the PUSCH of the uplink DMRS

Preferred embodiment six

枚 Enumeration characters or integer characters are used to represent the number of DMRS spatial multiplexing layers for each user, where different enumeration values or integer values indicate the use of different DMRS spatial multiplexing layers.

Table 8 Number of spatial multiplexing layers of uplink DMRS

Name ) description )

Enumeration character of DMRS

( ENUMERATE ) or an integer

Spatial multiplexing M or 0

Character (INTEGER)

Number of layers ( 1 , 2, 3 , 4 )

Preferred Embodiment 7:

枚 Enumerate characters or integer characters are used to indicate the starting position of each user's DMRS frequency domain, where different enumeration values or integer values indicate that different DMRS frequency domain start positions are used.

Table 9 Upstream DMRS frequency domain start position

Preferred Embodiment 8:

枚 Enumerate characters or integer characters are used to indicate the length of each user's DMRS sequence, where different enumeration values or integer values indicate the use of different DMRS sequence lengths.

Table 10 Sequence length of uplink DMRS

Preferred Embodiment 9:

枚 use enumerated characters or integer characters or bit characters to indicate each user's group hopping enable indication or sequence hopping enable indication or sequence group hopping unenabled indication, where different enumeration values or integers The value indicates whether the group hopping is enabled or the sequence hopping is enabled or the sequence group hopping is not enabled. Table 11 Group hopping enable indication or sequence hopping enable indication or sequence group hopping disable indication of the uplink DMRS

An embodiment of an IE item carrying resource occupancy information and/or parameter configuration information is shown below, as shown in Table 12.

The embodiment of the present invention further provides a base station, as shown in FIG. 7, including:

Transmitting module: It is arranged to send the message to a neighboring cell base station of the base station.

The message is a load information message or a message for interactive coordinated multi-point (CoMP) information.

The resource occupation information and/or parameter configuration information of the uplink DMRS in the message generated by the setting module includes at least one of the following information: cyclic shift region information of the uplink related downlink control information format (DCI format), and high layer signaling. The configured cyclic shift information, the group allocation information A _{ss of the} physical uplink shared channel (PUSCH), the group hopping enable indication, the sequence hopping enable indication, the sequence group hopping non-enable indication, and the orthogonal mask of the DMRS (OCC) enable indication, frequency domain start position, DMRS sequence length, frequency domain resource occupancy indication, and DMRS spatial multiplexing layer.

The setting module is further configured to use the information element of the X2 interface to represent resource occupation information and/or parameter configuration information of the uplink DMRS. The specific representation method refers to the method embodiment.

In summary, the information exchange method of the inter-cell uplink demodulation reference signal in the CoMP system of the embodiment of the present invention can indicate the parameters of the demodulation reference signal to meet the requirements of the uplink CoMP transmission, and solve the related art. The problem that the base station of the coordinated cell fails to correctly receive the uplink CoMP UE data improves the performance of the uplink CoMP system.

Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Industrial applicability

Compared with the prior art, the present invention can indicate the parameters of the demodulation reference signal to meet the requirements of the uplink CoMP transmission, and solve the problem that the base station of the coordinated cell in the related art fails to correctly receive the uplink CoMP UE data, and improve the problem. The performance of the uplink CoMP system.

Claims

Claim

1. An information interaction method for an uplink demodulation reference signal between cells, comprising:

The base station sends a message to the neighboring cell base station, where the message includes resource occupation information and/or parameter configuration information of the uplink demodulation reference signal (DMRS).

2. The method of claim 1, wherein the message is a load information message or a message for Cooperative Multipoint (CoMP) information.

3. The method according to claim 1, wherein the resource occupation information and/or parameter configuration information of the uplink DMRS includes at least one of the following information: cyclic shift region information of an uplink related downlink control information format (DCI format) The cyclic shift information of the high-level signaling configuration, the group allocation information A _{ss of the} physical uplink shared channel (PUSCH), the group hopping enable indication, the sequence hopping enable indication, the sequence group hopping non-enable indication, the DMRS The orthogonal mask (OCC) enable indication, the frequency domain start position, the DMRS sequence length, the frequency domain resource occupancy indication, and the DMRS spatial multiplexing layer.

4. The method according to claim 1, wherein the resource occupation information and/or parameter configuration information of the uplink DMRS is represented by an information element of the X2 interface.

5. The method according to claim 4, wherein, in the information element, a bit character is used to indicate DMRS frequency domain resource occupation information on each physical resource block (PRB), and each bit corresponds to whether there is an uplink DMRS on one PRB. .

The method according to claim 4, wherein, in the information element, the OTC occupation information of the DMRS on each PRB is represented by a bit character, and each bit corresponds to the OCC occupation information of the DMRS on one PRB; or, Representing each user's DMRS with an enumerated character or an integer character

OCC occupancy information, different enumeration values or integer values indicate the use of different occ.

7. The method according to claim 4, wherein, in the information element, an enumerated character or an integer character is used to indicate designation information of each user, and different enumeration values or integer values indicate that the specified information is different;

The specified information is cyclic shift region information of an uplink related DCI format of the DMRS, or

The cyclic shift information of the high-level signaling configuration of the DMRS, or the group allocation information A _ss of the PUSCH of the DMRS, or the DMRS spatial multiplexing layer, or the DMRS frequency domain starting position of each user, or the DMRS sequence length, or the group hopping The frequency enable indication or sequence hopping enable indication or sequence group hopping is not enabled.

The method according to any one of claims 1 to 7, wherein the base station is any base station in a cooperative set, and the neighboring cell base station is another base station except the base station in the cooperative set; or The base station is a base station of a serving cell in the cooperation set, and the neighboring cell base station is a base station of a coordinated centralized coordinated cell.

9. A base station comprising:

10. The base station according to claim 9, wherein the message is a load information message or a message for interactive coordinated multi-point (CoMP) information.

The base station according to claim 9, wherein the resource occupation information and/or parameter configuration information of the uplink DMRS in the message includes at least one of the following information: a cyclic shift of an uplink related downlink control information format (DCI format) Bit area information, cyclic shift information of high layer signaling configuration, group allocation information A _{ss of} physical uplink shared channel (PUSCH), group frequency hopping enable indication, sequence frequency hopping enable indication, sequence group frequency hopping disable indication Orthogonal mask (OCC) enable indication, frequency domain start position, DMRS sequence length, frequency domain resource occupancy indication, and DMRS spatial multiplexing layer of the DMRS.

The base station according to claim 9, wherein the setting module is further configured to use the information element of the X2 interface to represent resource occupation information and/or parameter configuration information of the uplink DMRS.

The base station according to claim 12, wherein the setting module is configured to represent resource occupation information and/or parameter configuration information of the uplink DMRS by: using bit characters in the information element to indicate each DMRS frequency domain resource occupation information on a physical resource block (PRB), and whether each bit corresponds to an uplink DMRS on a PRB.

The base station according to claim 12, wherein the setting module is configured to represent resource occupation information and/or parameter configuration information of the uplink DMRS by using a bit character representation in the information element. OCC occupation information of the DMRS on each PRB, each bit corresponding to the OCC occupation information of the DMRS on one PRB; or, an enumeration character or an integer character indicating the OCC occupation information of each user's DMRS, different enumeration values or Integer values indicate different uses Occ.

The base station according to claim 12, wherein the setting module is configured to represent resource occupation information and/or parameter configuration information of the uplink DMRS by using an enumerated type in the information element. A character or an integer character indicates designation information of each user, and different enumeration values or integer values indicate that the specified information is different;