WO2017012090A1

WO2017012090A1 - Method and device for configuring downlink demodulation reference signal (dmrs) port

Info

Publication number: WO2017012090A1
Application number: PCT/CN2015/084776
Authority: WO
Inventors: 吴强; 孙昊; 张旭
Original assignee: 华为技术有限公司
Priority date: 2015-07-22
Filing date: 2015-07-22
Publication date: 2017-01-26
Also published as: CN106664695A; CN106664695B

Abstract

A method and device for configuring a downlink DMRS port. The method in the solution comprises: determining a terminal identifier (ID) of a terminal and a cell ID of a cell in which the terminal is located currently; calculating a random sequence corresponding to the terminal according to the terminal ID and the cell ID; and for any one subframe, determining a port number corresponding to a downlink DMRS port when the terminal is under any one subframe according to the random sequence, and taking the downlink DMRS port corresponding to the port number as a downlink DMRS port which can be used when the terminal is under any one subframe. In the solution, since ports corresponding to terminals under different subframes may also be different, the probability that all the ports corresponding to different terminals within a period of time are the same is small. Thus, the probability that a base station enables the MU-MIMO technology is improved, thereby improving the system throughput.

Description

Method and device for configuring downlink demodulation reference signal DMRS port

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for configuring a downlink DMRS (De Modulation Reference Signal) port.

Background technique

With the development of communication technology, the total number of devices connected to the global mobile communication network will reach 100 billion. It is estimated that by 2020, the number of global mobile terminals (excluding IoT devices) will exceed 10 billion, of which China will exceed 2 billion. Currently, in the LTE (Long Term Evolution) system, the downlink data scheduling is performed by a PDCCH (Physical Downlink Control Channel)/ePDCCH (Enhanced Physical Downlink Control Channel). It is implemented that one PDCCH/ePDCCH signaling can only schedule one downlink data transmission. The large number of user connections in future communications, and the potential number of concurrent access users pose a challenge to the capacity of the control channel. In order to reduce the control channel overhead, a packet-based downlink transmission scheme emerges. In this scheme, once Scheduling can trigger multiple downlink data transmissions.

In order to improve system ^{throughput, 3GPP (3 rd Generation Partnership Project} , Third Generation Partnership Project) proposed MU-MIMO (Multi-User Multiple -Input Multiple-Output, multi-user multiple input multiple output) technology, the MU-MIMO In the technology, the base station dynamically allocates DMRS ports to the terminal through PDCCH/ePDCCH signaling, and the base station uses different downlink DMRS ports to simultaneously transmit downlink data to multiple terminals. However, in the packet-triggered downlink transmission mode, the downlink DMRS port of the terminal is semi-statically configured by the base station, that is, the downlink DMRS port of the terminal is fixed for a period of time. In this case, the downlink DMRS ports of some terminals are the same. In this case, the base station cannot enable the MU-MIMO technology to transmit downlink data to such terminals, thereby reducing system throughput.

In summary, the current method of configuring the downlink DMRS port may be because the different terminals may correspond to the same downlink DMRS port, and the base station cannot enable the MU-MIMO technology to cause the system to swallow. Defects with reduced throughput.

Summary of the invention

The embodiment of the invention provides a method and a device for configuring a downlink DMRS port, which are used to prevent different terminals from corresponding to the same downlink DMRS port, so as to implement the effect that the base station can enable the MU-MIMO technology to improve the system throughput.

The first aspect provides a method for configuring a downlink DMRS port, including:

Determining a terminal identification ID of the terminal, and a cell ID of a cell in which the terminal is currently located;

Calculating a random sequence corresponding to the terminal according to the terminal ID and the cell ID;

Determining, according to the random sequence, a port number of a downlink demodulation reference signal DMRS port corresponding to the terminal in the any one subframe, and using the downlink DMRS port corresponding to the port number as the A downlink DMRS port that the terminal can adopt in any one of the subframes.

With reference to the first aspect, in a first possible implementation manner, the terminal ID is a globally unique identifier or a wireless network temporary identifier RNTI.

With reference to the first aspect, and the first possible implementation manner of the first aspect, in a second possible implementation, the calculating the random sequence corresponding to the terminal according to the terminal ID and the cell ID, including:

Calculating an initial value according to the terminal ID and the cell ID;

Calculating a random sequence corresponding to the terminal according to the initial value.

With reference to the second possible implementation of the first aspect, in a third possible implementation, the initial value is calculated according to the terminal ID and the cell ID, including:

The initial value is calculated according to the terminal ID and the cell ID by using the following rules:

c _init =ID1*2 ^A +ID2

Where c _init is the initial value, ID1 is the terminal ID, ID2 is the cell ID, and A is a constant.

With reference to the third possible implementation manner of the foregoing aspect, in a fourth possible implementation, the calculating the random sequence corresponding to the terminal according to the initial value includes:

Converting the initial value to an initial value expressed in binary;

Determining the first sequence according to the initial value expressed in binary;

Determining the second sequence;

And calculating, according to the first sequence and the second sequence, a random sequence corresponding to the terminal.

In conjunction with the fourth possible implementation of the first aspect, in a fifth possible implementation, converting the initial value to an initial value expressed in binary includes:

The initial value is converted to an initial value expressed in binary as follows:

Where i denotes the number of the bit; the value of m is equal to the length of the initial value expressed in binary minus one;

Determining the first sequence according to the initial value expressed in binary, comprising:

The bit weight in the initial value expressed in binary is taken as the first sequence.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, when i is greater than m, x ₁ (i) is determined as follows:

x ₁ (i)=(x ₁ (i-m+3)+x ₁ (i-m+2)+x ₁ (i-m+1)+x ₁ (im)) mod2.

In conjunction with the fourth possible implementation of the first aspect, in a seventh possible implementation, determining the second sequence includes:

The second sequence is determined using the following rules:

With reference to the fourth to seventh possible implementation manners of the first aspect, in the eighth possible implementation, the calculating the random sequence corresponding to the terminal according to the first sequence and the second sequence includes:

The random sequence is calculated using the following rules:

C = (x ₁ (i) + x ₂ (i)) mod2, where C is the random sequence.

With reference to the first aspect, or the first to the eighth possible implementation manners of the first aspect, in the ninth possible implementation, determining, by the random sequence, the terminal in the any one of the subframes The port number of the corresponding downlink DMRS port, including:

Determining, from the random sequence, a value in a specified bit corresponding to the any one of the subframes, using a port number corresponding to the determined value as a port number of the downlink DMRS port, or determining a value and And combining the values in the bits in which the specified bit matches the preset relationship, and the port number corresponding to the combined value is used as the port number of the downlink DMRS port.

With reference to the ninth possible implementation manner of the foregoing aspect, in a tenth possible implementation manner, before determining a value in a specified bit corresponding to the any one of the random sequences, :

The specified bit corresponding to the any one of the subframes is determined by using the following rules:

P=N*R*L+n _f *L+n _s

Wherein, P is the specified bits, N being the number of cycles of the cycle of the radio frame number, R is the number of radio frames included in the cycle, n _f of the subframe is located at any of a radio frame number of a radio frame L is the number of wireless subframes included in the radio frame, and n _s is the subframe number of any one of the subframes.

A second aspect provides an apparatus for configuring a downlink DMRS port, including:

a determining unit, configured to determine a terminal identifier ID of the terminal, and a cell ID of a cell where the terminal is currently located;

a calculating unit, configured to calculate a random sequence corresponding to the terminal according to the terminal ID and the cell ID;

The determining unit is further configured to, according to the random sequence, determine, according to the random sequence, a port number of a downlink demodulation reference signal DMRS port corresponding to the terminal in the any one subframe, and the port number The corresponding downlink DMRS port is used as a downlink DMRS port that the terminal can adopt in any one of the subframes.

With reference to the second aspect, in a first possible implementation manner, the terminal ID is a globally unique identifier or a wireless network temporary identifier RNTI.

With reference to the second aspect, and the first possible implementation manner of the second aspect, in a second possible implementation manner, the calculating unit calculates the terminal according to the terminal ID and the cell ID Corresponding random sequence, specifically:

Calculating an initial value according to the terminal ID and the cell ID;

With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner, when the calculating unit calculates an initial value according to the terminal ID and the cell ID, the calculating unit is specifically:

c _init =ID1*2 ^A +ID2

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation, the computing unit, when calculating the random sequence corresponding to the terminal according to the initial value, is specifically:

Converting the initial value to an initial value expressed in binary;

Determining the second sequence;

With reference to the fourth possible implementation of the second aspect, in a fifth possible implementation, the computing unit, when converting the initial value into an initial value expressed in binary, is specifically:

When the calculating unit determines the first sequence according to the initial value expressed in binary, the calculating unit is specifically:

With reference to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner, when i is greater than m, x ₁ (i) is determined as follows:

x ₁ (i)=(x ₁ (i-m+3)+x ₁ (i-m+2)+x ₁ (i-m+1)+x ₁ (im)) mod2.

With reference to the fourth possible implementation of the second aspect, in a seventh possible implementation manner, when the calculating unit determines the second sequence, specifically:

The second sequence is determined using the following rules:

With reference to the fourth to seventh possible implementations of the second aspect, in an eighth possible implementation, the calculating unit calculates, according to the first sequence, the second sequence, a random corresponding to the terminal When the sequence is specific, it is:

The random sequence is calculated using the following rules:

C = (x ₁ (i) + x ₂ (i)) mod2, where C is the random sequence.

With reference to the second aspect, or the first to the eighth possible implementation manners of the second aspect, in a ninth possible implementation manner, the determining unit determines, according to the random sequence, that the terminal is in any one of the foregoing When the port number of the downlink DMRS port corresponding to the subframe is specified as follows:

In conjunction with the ninth possible implementation of the second aspect, in a tenth possible implementation, the determining unit is further configured to:

P=N*R*L+n _f *L+n _s

In the embodiment of the present invention, a method for configuring a downlink DMRS port is provided: determining a terminal identifier ID of a terminal, and a cell ID of a cell where the terminal is currently located; and according to the terminal ID and the cell The ID calculates a random sequence corresponding to the terminal, and determines, according to the random sequence, a port number of the downlink DMRS port corresponding to the terminal in any one subframe, and uses the downlink DMRS port corresponding to the port number as The downlink DMRS port that the terminal can adopt in any one of the subframes. In this solution, the ports corresponding to the terminals in different subframes may also be different, and the ports corresponding to different terminals in a certain period of time. The probability of being the same is small, so the probability of the base station enabling the MU-MIMO technology is increased, thereby improving the system throughput.

DRAWINGS

FIG. 1 is a flowchart of configuring a downlink DMRS port according to an embodiment of the present invention;

2 is an embodiment of configuring a downlink DMRS port according to an embodiment of the present invention;

3A is a schematic diagram of an apparatus for configuring a downlink DMRS port according to an embodiment of the present invention;

FIG. 3B is another schematic diagram of an apparatus for configuring a downlink DMRS port according to an embodiment of the present invention.

detailed description

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

Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the letter "/" in this article generally indicates that the contextual object is an "or" relationship.

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, and the preferred embodiments of the present invention are intended to illustrate and explain the invention, and not to limit the invention, and The embodiments in the application and the features in the embodiments may be combined with each other.

As shown in FIG. 1 , a method for configuring a downlink DMRS port is provided in the embodiment of the present invention, and the specific process is as follows:

Step 100: Determine a terminal ID of the terminal, and a cell ID of a cell where the terminal is currently located;

Step 110: Calculate a random sequence corresponding to the terminal according to the terminal ID and the cell ID.

Step 120: Determine, for any one subframe, a port number of the downlink DMRS port corresponding to the terminal in any one subframe according to the random sequence, and use the downlink DMRS port corresponding to the port number as the downlink DMRS that the terminal can adopt in any one subframe. port.

In the embodiment of the present invention, optionally, the terminal ID may be a globally unique identifier. The first N bits of the globally unique identifier of different terminals in the same cell may be the same. In this case, the first N bits of the calculated random sequence are It may be the same. If the port number of the corresponding downlink DMRS port corresponding to the terminal in any one subframe is determined according to the random sequence in step 120, the port number is determined according to the first N bits of the random sequence, then different The downlink DMRS port determined by the terminal may be the same. Therefore, the terminal ID may also be an RNTI (Radio Network Tempory Identity) in order to avoid determining the same downlink DMRS port sequence for different terminals.

Optionally, the value of the cell ID may be [0, 503], and when the terminal ID is RNTI, the value of the terminal ID may be [0, 65535]. It should be noted that, with the development of the communication technology, the value range of the cell ID and the value range of the terminal ID may be changed, and are not limited to the above-mentioned value range, and will not be described in detail herein.

In the embodiment of the present invention, when the random sequence corresponding to the terminal is calculated according to the terminal ID and the cell ID, optionally, the following manner may be adopted:

Calculating an initial value according to the terminal ID and the cell ID;

Then, the random sequence corresponding to the terminal is calculated according to the initial value.

Wherein, when the initial value is calculated according to the terminal ID and the cell ID, the following may also be adopted:

The initial value is calculated based on the terminal ID and the cell ID using the following rules:

c _init =ID1*2 ^A +ID2 (Formula 1)

Where c _init is the initial value, ID1 is the terminal ID, ID2 is the cell ID, A is a constant, and optionally, A is 14.

Of course, the above is only a specific way of calculating the initial value, but the actual application is not limited to this, and will not be described in detail here.

In the embodiment of the present invention, when calculating the random sequence corresponding to the terminal according to the initial value, optionally, the following manner may be adopted:

Converting the initial value to an initial value expressed in binary;

Determining the first sequence according to an initial value expressed in binary;

Determining the second sequence;

The random sequence corresponding to the terminal is calculated according to the first sequence and the second sequence.

Wherein, when converting the initial value to the initial value expressed in binary, optionally, the following manner may be adopted:

(Formula 2)

At this time, when determining the first sequence according to the initial value expressed in binary, optionally, the following manner may be adopted:

For example, using the formula a calculated c _init is 56, then c after _init converted into binary _{^{to: c init = 1 * 2 5}} + 1 * 2 4 + 1 * 2 3 + 0 * 2 2 + 0 * 2 1 + 0*2 ⁰ , it can be inferred that x ₁ (0), x ₁ (1) and x ₁ (2) are all 0, x ₁ (3), x ₁ (4) and x ₁ (5) Is 1.

As another example, using the formula a calculated c _init is 57, then c after _init converted into binary _{^{to: c init = 1 * 2 5}} + 1 * 2 4 + 1 * 2 3 + 0 * 2 2 + 0 * 2 1 +1*2 ⁰ , at this point it can be inferred that x ₁ (1) and x ₁ (2) are both 0, x ₁ (0), x ₁ (3), x ₁ (4), and x ₁ (5) Both are 1.

The above describes the value of x ₁ (i) when i is less than or equal to m. When calculating a random sequence, i may be greater than m. In this case, x ₁ (i) is determined as follows:

x ₁ (i)=(x ₁ (i-m+3)+x ₁ (i-m+2)+x ₁ (i-m+1)+x ₁ (im))mod2 (Equation 3)

That is to say, when i is less than or equal to m, the calculation of x ₁ (i) can be calculated by formula 2. When i is greater than m, the calculation of x ₁ (i) can be calculated by formula 3.

For example, using the formula a calculated c _init is 57, then c after _init converted into binary _{^{to: c init = 1 * 2 5}} + 1 * 2 4 + 1 * 2 3 + 0 * 2 2 + 0 * 2 1 + 1*2 ⁰ , at this time, x ₁ (1) and x ₁ (2) are both 0, x ₁ (0), x ₁ (3), x ₁ (4), and x ₁ (5) are both 1, When calculating x ₁ (6), formula 3 can be used, which can be as follows:

As another example, using the formula a calculated c _init is 56, then c after _init converted into binary _{^{to: c init = 1 * 2 5}} + 1 * 2 4 + 1 * 2 3 + 0 * 2 2 + 0 * 2 1 +0*2 ⁰ , at this time, x ₁ (0), x ₁ (1), and x ₁ (2) are all 0, and x ₁ (3), x ₁ (4), and x ₁ (5) are both 1 For the calculation of x ₁ (6), Equation 3 can be used, which can be as follows: x ₁ (6) = (x ₁ (4) + x ₁ (3) + x ₁ (2) + x ₁ (1)) Mod2=1.

The above is exemplified by taking m as an example. In practical applications, m may also be other values, but the calculation process is similar, and no further description is given here.

In the embodiment of the present invention, when determining the second sequence, optionally, the following manner may be adopted:

(Formula 4)

When m is 5, x ₁ (0) is _{1, x 1 (1),} x 1 (3), x 1 (4) and x ₁ (5) 0 are calculated x _₁ x ₁ (2), (6) can be used as follows: x ₂ (6) = (x ₂ (6-5+3) + x ₂ (6-5)) mod2 = (x ₂ (4) + x ₂ (1)) mod2 = 0.

In the embodiment of the present invention, when the random sequence corresponding to the terminal is calculated according to the first sequence and the second sequence, optionally, the following manner may be adopted:

Calculate the random sequence using the following rules:

C=(x ₁ (i)+x ₂ (i)) mod2 (formula 5)

Where C is a random sequence.

In the embodiment of the present invention, further, in order to improve the random sequence calculated by different terminals, With the same probability, Equation 5 can be further optimized as follows:

C=(x ₁ (i+1600)+x ₂ (i+1600)) mod2 (Formula 6)

When the port number of the downlink DMRS port corresponding to the terminal in any one subframe is determined according to the random sequence, the following may be adopted:

Determining a value in a specified bit corresponding to any one of the subframes from the random sequence, using the port number corresponding to the determined value as the port number of the downlink DMRS port, or matching the determined value with the specified bit The values in the bits of the relationship are combined, and the port number corresponding to the combined value is used as the port number of the downlink DMRS port.

For example, port 8 corresponds to 1 and port 7 corresponds to 0. The specified bit is the 5th bit in the random sequence. If the value 1 in the 5th bit is 1, the port 8 is used as the downlink DMRS port; if the 5th If the value bit in the bit is 0, then port 7 is used as the downstream DMRS port.

For example, port 8 corresponds to 11, 00, port 7 corresponds to 10, 01, and the designated bit is the fifth bit in the random sequence, and the bit that matches the specified bit with the preset bit is the third bit. The value in the 5th bit is 1, and the value in the 3rd bit is 1, then port8 is used as the downlink DMRS port; if the value in the 5th bit is 0, if in the 3rd bit If the value is 0, port8 is used as the downlink DMRS port; if the value in the 5th bit is 0, if the value in the 3rd bit is 1, port7 is used as the downlink DMRS port; if the 5th bit is used The value in the value is 1, and if the value in the third bit is 0, port 7 is used as the downstream DMRS port.

The bit described above in accordance with the preset relationship with the specified bit is a bit that is non-contiguous with the specified bit. Of course, the bit that conforms to the preset bit with the specified bit may also be a bit that is continuous with the specified bit.

For example, port 8 corresponds to 11, 00, port 7 corresponds to 10, 01, and the designated bit is the fifth bit in the random sequence, and the bit that matches the specified bit with the preset bit is the fourth bit. The value in the 5th bit is 1, and the value in the 4th bit is 1, then port8 is used as the downlink DMRS port; if the value in the 5th bit is 0, if in the 4th bit If the value is 0, port8 is used as the downlink DMRS port; if the value in the 5th bit is 0, if the value in the 4th bit is 1, port7 is used as the downlink DMRS port; if the 5th bit is used The value in is 1 and if the value in the 4th bit is 0, port 7 is used as the downstream DMRS port. Before determining the value in the specified bit corresponding to any sub-frame from the random sequence, it also includes:

The specified bit corresponding to any subframe is determined by the following rules:

P=N*R*L+n _f *L+n _s (Equation 7)

Where P is the designated bit, N is the number of cycles of the cyclic period of the radio frame number, R is the number of radio frames included in the cycle, n _{f is} the radio frame number of the radio frame in which any sub-frame is located, and L is the radio frame The number of wireless subframes included, n _s is the subframe number of any subframe.

It should be noted that the cycle period of one radio frame number refers to the change of the radio frame number from 0 to the maximum value of the radio frame number. For example, the radio frame number ranges from [0, 1, 2, ..., 1023], when the radio frame number starts to change from 0 to 1023, the cycle period of the first radio frame number ends, and the cycle period of the second radio frame number starts, and the radio frame number changes from 0 to change. At 1023, the cycle period of the second radio frame number ends, and the third radio frame number period is started, and the loop is repeated until the end.

For a better understanding of the embodiments of the present invention, a specific application scenario is given below, and a process for configuring a downlink DMRS port is further described in detail, as shown in FIG. 2:

Step 200: Determine an RNTI used by the terminal 1 in the current cell, and a cell ID of the current cell.

Step 210: Calculate an initial value of 121 according to the RNTI and the cell ID by using Equation 1.

Step 220: Display 121 in binary

It can be concluded that x ₁ (0), x ₁ (3), x ₁ (4), x ₁ (5), and x ₁ (6) are all 1, x ₁ (1), and x ₁ (2) are 0. ;

Step 230: Calculate x ₁ (i) when i is greater than 6 by using formula 3;

Step 240: Calculate x ₂ (i) using Equation 4;

Step 250: Calculate the random sequence C according to the calculated x ₁ (i) and x ₂ (i) using Equation 5;

Step 260: For any subframe, select one from the random sequence according to formula seven The specified bit corresponding to the subframe;

Step 270: Determine a port number of a downlink DMRS port corresponding to the value in the specified bit.

Step 280: The terminal 1 transmits or receives data by using a downlink DMRS port corresponding to the determined port number.

Based on the technical solution of the foregoing corresponding method, referring to FIG. 3A, an embodiment of the present invention provides an apparatus for configuring a downlink DMRS port, where the apparatus includes a determining unit 30 and a calculating unit 31, where:

a determining unit 30, configured to determine a terminal identifier ID of the terminal, and a cell ID of a cell where the terminal is currently located;

The calculating unit 31 is configured to calculate a random sequence corresponding to the terminal according to the terminal ID and the cell ID;

The determining unit 30 is further configured to: determine, according to the random sequence, the port number of the downlink demodulation reference signal DMRS port corresponding to the terminal in any one subframe according to the random sequence, and use the downlink DMRS port corresponding to the port number as the terminal. A downlink DMRS port that can be used in one subframe.

In the embodiment of the present invention, optionally, the terminal ID is a globally unique identifier or a wireless network temporary identifier RNTI.

In the embodiment of the present invention, optionally, when calculating the random sequence corresponding to the terminal according to the terminal ID and the cell ID, the calculating unit 31 is specifically:

Calculating an initial value according to the terminal ID and the cell ID;

The random sequence corresponding to the terminal is calculated according to the initial value.

In the embodiment of the present invention, optionally, when calculating the initial value according to the terminal ID and the cell ID, the calculating unit 31 is specifically:

c _init =ID1*2 ^A +ID2

In the embodiment of the present invention, optionally, when calculating the random sequence corresponding to the terminal according to the initial value, the calculating unit 31 is specifically:

Converting the initial value to an initial value expressed in binary;

Determining the second sequence;

In the embodiment of the present invention, optionally, when the initial value is converted into an initial value expressed in binary, the calculating unit 31 is specifically:

The calculating unit 31, when determining the first sequence according to the initial value expressed in binary, is specifically:

In the embodiment of the present invention, optionally, when i is greater than m, x ₁ (i) is determined as follows:

x ₁ (i)=(x ₁ (i-m+3)+x ₁ (i-m+2)+x ₁ (i-m+1)+x ₁ (im)) mod2.

In the embodiment of the present invention, optionally, when the calculating unit 31 determines the second sequence, specifically:

The second sequence is determined using the following rules:

In the embodiment of the present invention, optionally, when the calculating unit 31 calculates the random sequence corresponding to the terminal according to the first sequence and the second sequence, the specific:

Calculate the random sequence using the following rules:

C = (x ₁ (i) + x ₂ (i)) mod2, where C is a random sequence.

In the embodiment of the present invention, the determining unit 30 determines, according to the random sequence, the port number of the downlink DMRS port corresponding to the terminal in any one subframe, specifically:

Determining a value in a specified bit corresponding to any one of the subframes from the random sequence, using the port number corresponding to the determined value as the port number of the downlink DMRS port, or determining the value And combining the values in the bits that match the specified bit with the preset bit, and the port number corresponding to the combined value is used as the port number of the downlink DMRS port.

In the embodiment of the present invention, further, the determining unit 30 is further configured to:

P=N*R*L+n _f *L+n _s

The device of the present invention provides an apparatus for configuring a downlink DMRS port, including at least one processor 301, a communication bus 302, a memory 303, and at least one communication interface 304.

The communication bus 302 is used to implement the connection and communication between the above components, and the communication interface 304 is used to connect and communicate with external devices.

The memory 303 is configured to store executable program code, and the processor 301 executes the program code for:

For any subframe, the port number of the downlink demodulation reference signal DMRS port corresponding to the terminal in any one subframe is determined according to the random sequence, and the downlink DMRS port corresponding to the port number is used as the downlink that the terminal can adopt in any subframe. DMRS port.

It should be noted that the processor 301 can also perform other operations performed by the determining unit 30 and the calculating unit 31 in FIG. 3A, and details are not described herein again.

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 present invention may employ computer-usable storage media (including but not limited to disks) in one or more of the computer-usable program code embodied therein. The form of a computer program product implemented on a memory, CD-ROM, optical memory, or the like.

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

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

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

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

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

Claims

A method for configuring a downlink DMRS port, comprising:

Determining a terminal identification ID of the terminal, and a cell ID of a cell in which the terminal is currently located;

Calculating a random sequence corresponding to the terminal according to the terminal ID and the cell ID;

Determining, according to the random sequence, a port number of a downlink demodulation reference signal DMRS port corresponding to the terminal in the any one subframe, and using the downlink DMRS port corresponding to the port number as the A downlink DMRS port that the terminal can adopt in any one of the subframes.
The method according to claim 1, wherein the terminal ID is a globally unique identifier or a wireless network temporary identifier RNTI.
The method according to claim 1 or 2, wherein calculating the random sequence corresponding to the terminal according to the terminal ID and the cell ID comprises:

Calculating an initial value according to the terminal ID and the cell ID;

Calculating a random sequence corresponding to the terminal according to the initial value.
The method according to claim 3, wherein calculating an initial value according to the terminal ID and the cell ID comprises:

The initial value is calculated according to the terminal ID and the cell ID by using the following rules:

c init =ID1*2 A +ID2

Where c init is the initial value, ID1 is the terminal ID, ID2 is the cell ID, and A is a constant.
The method according to claim 4, wherein calculating the random sequence corresponding to the terminal according to the initial value comprises:

Converting the initial value to an initial value expressed in binary;

Determining the first sequence according to the initial value expressed in binary;

Determining the second sequence;

And calculating, according to the first sequence and the second sequence, a random sequence corresponding to the terminal.
The method of claim 5 wherein converting the initial value to an initial value expressed in binary comprises:

The initial value is converted to an initial value expressed in binary as follows:

Where i denotes the number of the bit; the value of m is equal to the length of the initial value expressed in binary minus one;

Determining the first sequence according to the initial value expressed in binary, comprising:

The bit weight in the initial value expressed in binary is taken as the first sequence.
The method of claim 6 wherein when i is greater than m, x 1 (i) is determined in the following manner:

x 1 (i)=(x 1 (i-m+3)+x 1 (i-m+2)+x 1 (i-m+1)+x 1 (im)) mod2.
The method of claim 5 wherein determining the second sequence comprises:

The second sequence is determined using the following rules:
The method according to any one of claims 5-8, wherein calculating the random sequence corresponding to the terminal according to the first sequence and the second sequence comprises:

The random sequence is calculated using the following rules:

C = (x 1 (i) + x 2 (i)) mod2, where C is the random sequence.
The method according to any one of claims 1 to 9, wherein determining, according to the random sequence, a port number of a downlink DMRS port corresponding to the terminal in the any one of the subframes, including:

Determining, from the random sequence, a value in a specified bit corresponding to the any one of the subframes, using a port number corresponding to the determined value as a port number of the downlink DMRS port, or determining a value and And combining the values in the bits in which the specified bit matches the preset relationship, and the port number corresponding to the combined value is used as the port number of the downlink DMRS port.
The method according to claim 10, wherein before determining the value in the specified bit corresponding to the any one of the subframes from the random sequence, the method further includes:

The specified bit corresponding to the any one of the subframes is determined by using the following rules:

P=N*R*L+n f *L+n s

Wherein, P is the specified bits, N being the number of cycles of the cycle of the radio frame number, R is the number of radio frames included in the cycle, n f of the subframe is located at any of a radio frame number of a radio frame L is the number of wireless subframes included in the radio frame, and n s is the subframe number of any one of the subframes.
An apparatus for configuring a downlink DMRS port, including:

a determining unit, configured to determine a terminal identifier ID of the terminal, and a cell ID of a cell where the terminal is currently located;

a calculating unit, configured to calculate a random sequence corresponding to the terminal according to the terminal ID and the cell ID;

The determining unit is further configured to, according to the random sequence, determine, according to the random sequence, a port number of a downlink demodulation reference signal DMRS port corresponding to the terminal in the any one subframe, and the port number The corresponding downlink DMRS port is used as a downlink DMRS port that the terminal can adopt in any one of the subframes.
The apparatus according to claim 12, wherein the terminal ID is a globally unique identifier or a wireless network temporary identifier RNTI.
The device according to claim 12 or 13, wherein the calculating unit calculates the random sequence corresponding to the terminal according to the terminal ID and the cell ID, specifically:

Calculating an initial value according to the terminal ID and the cell ID;

Calculating a random sequence corresponding to the terminal according to the initial value.
The device according to claim 14, wherein the calculating unit calculates an initial value according to the terminal ID and the cell ID, specifically:

The initial value is calculated according to the terminal ID and the cell ID by using the following rules:

c init =ID1*2 A +ID2

Where c init is the initial value, ID1 is the terminal ID, ID2 is the cell ID, and A is a constant.
The device according to claim 15, wherein the calculating unit, when calculating the random sequence corresponding to the terminal according to the initial value, is specifically:

Converting the initial value to an initial value expressed in binary;

Determining the first sequence according to the initial value expressed in binary;

Determining the second sequence;

And calculating, according to the first sequence and the second sequence, a random sequence corresponding to the terminal.
The apparatus according to claim 16, wherein said calculating unit converts said initial value into an initial value expressed in binary, specifically:

The initial value is converted to an initial value expressed in binary as follows:

Where i denotes the number of the bit; the value of m is equal to the length of the initial value expressed in binary minus one;

When the calculating unit determines the first sequence according to the initial value expressed in binary, the calculating unit is specifically:

The bit weight in the initial value expressed in binary is taken as the first sequence.
The apparatus according to claim 17, wherein when i is greater than m, x 1 (i) is determined in the following manner:

x 1 (i)=(x 1 (i-m+3)+x 1 (i-m+2)+x 1 (i-m+1)+x 1 (im)) mod2.
The device according to claim 16, wherein when the calculating unit determines the second sequence, it is specifically:

The second sequence is determined using the following rules:
The device according to any one of claims 16 to 19, wherein the calculating unit calculates a random sequence corresponding to the terminal according to the first sequence and the second sequence, specifically:

The random sequence is calculated using the following rules:

C = (x 1 (i) + x 2 (i)) mod2, where C is the random sequence.
Apparatus according to any one of claims 12 to 20, wherein said determining unit root And determining, according to the random sequence, a port number of the downlink DMRS port corresponding to the terminal in the any one of the subframes, specifically:

Determining, from the random sequence, a value in a specified bit corresponding to the any one of the subframes, using a port number corresponding to the determined value as a port number of the downlink DMRS port, or determining a value and And combining the values in the bits in which the specified bit matches the preset relationship, and the port number corresponding to the combined value is used as the port number of the downlink DMRS port.
The apparatus according to claim 21, wherein said determining unit is further configured to:

The specified bit corresponding to the any one of the subframes is determined by using the following rules:

P=N*R*L+n f *L+n s

Wherein, P is the specified bits, N being the number of cycles of the cycle of the radio frame number, R is the number of radio frames included in the cycle, n f of the subframe is located at any of a radio frame number of a radio frame L is the number of wireless subframes included in the radio frame, and n s is the subframe number of any one of the subframes.