CN108809562B - DMRS sequence determination method, terminal and network side equipment - Google Patents

DMRS sequence determination method, terminal and network side equipment Download PDF

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CN108809562B
CN108809562B CN201710301746.XA CN201710301746A CN108809562B CN 108809562 B CN108809562 B CN 108809562B CN 201710301746 A CN201710301746 A CN 201710301746A CN 108809562 B CN108809562 B CN 108809562B
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terminal
dmrs
sequence
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network side
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CN108809562A (en
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王磊
李辉
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/0008—Wavelet-division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

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Abstract

The invention provides a DMRS sequence determination method, a terminal and network side equipment, wherein the method comprises the following steps: a terminal acquires a DMRS sequence receiving parameter associated with the terminal; and the terminal acquires the DMRS sequence corresponding to the DMRS sequence receiving parameter sent by the network side equipment. The embodiment of the invention can improve the accuracy of distinguishing the DMRS sequences used by self demodulation.

Description

DMRS sequence determination method, terminal and network side equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a demodulation reference Signal (DMRS) sequence determining method, a terminal, and a network side device.
Background
In Long Term Evolution (LTE), a Multi-user Multiple-Input Multiple-Output (MU-MIMO) technology can be applied to an Enhanced Physical Downlink Control Channel (EPDCCH). When the EPDCCH is transmitted by MU-MIMO, different terminals distinguish DMRS sequences required by self demodulation according to different antenna ports (antenna ports) used by DMRS transmission. However, in a future wireless mobile communication system, the structural design of the downlink control channel may be different from that of the EPDCCH, so that the terminal distinguishes DMRS sequences used for self-demodulation according to different antenna ports (antenna ports) used for DMRS transmission, thereby causing a problem of poor accuracy for distinguishing the DMRS sequences used for self-demodulation.
Disclosure of Invention
The invention aims to provide a DMRS sequence determination method, a terminal and network side equipment, so as to solve the problem of poor accuracy of distinguishing DMRS sequences used by self demodulation.
In order to achieve the above object, an embodiment of the present invention provides a method for determining a DMRS sequence, including:
a terminal acquires a DMRS sequence receiving parameter associated with the terminal;
and the terminal acquires the DMRS sequence corresponding to the DMRS sequence receiving parameter sent by the network side equipment.
Optionally, the DMRS receiving parameters include DMRS initialization parameters, and the obtaining, by the terminal, a DMRS sequence corresponding to the DMRS sequence receiving parameters sent by the network side device includes:
and the terminal generates a DMRS prediction sequence by using the initialization parameter, and receives the DMRS sequence matched with the DMRS prediction sequence in the DMRS sequence sent by the network side equipment.
Optionally, the initialization parameter is associated with an identifier of the terminal.
Optionally, the DMRS receiving parameters include Orthogonal Cover Code (OCC) sequences, and the obtaining, by the terminal, the DMRS sequence receiving parameters corresponding to the DMRS sequences sent by the network side device includes:
and the terminal descrambles the scrambled signal sent by the network side equipment by using the OCC sequence associated with the terminal to obtain a descrambled DMRS sequence.
Optionally, the OCC sequence associated with the terminal includes:
and the OCC sequence associated with the identifier of the terminal or the OCC sequence pre-configured for the terminal by the network side equipment.
Optionally, the DMRS receiving parameters include Resource Element Group (REG) parameters, and the obtaining, by the terminal, the DMRS sequence corresponding to the DMRS sequence receiving parameters sent by the network side device includes:
and the terminal determines the REG corresponding to the terminal according to the REG parameter associated with the terminal, and acquires the DMRS sequence sent to the terminal by the network side equipment in the REG.
Optionally, the REG associated with the terminal includes:
the REG associated with the identifier of the terminal or the REG configured for the terminal in advance by the network side equipment; and/or
The REGs include frequency domain REGs and/or time domain REGs.
The embodiment of the invention also provides a method for determining the DMRS sequence, which comprises the following steps:
the method comprises the steps that network side equipment generates a DMRS sequence of a terminal;
and the network side equipment transmits the DMRS sequence of the terminal so that the terminal can use the associated DMRS sequence to receive the parameters and acquire the own DMRS sequence.
Optionally, the DMRS sequence of each terminal is generated using the associated initialization parameter.
Optionally, the initialization parameter associated with each terminal is associated with a respective identifier.
Optionally, the sending, by the network side device, the DMRS sequence of the terminal includes:
and the network side equipment transmits the DMRS sequences of at least one terminal by using the same antenna port.
Optionally, the sending, by the network side device, the DMRS sequence of the terminal includes:
and the network side equipment scrambles the DMRS sequences of the plurality of terminals by using different OCC sequences and sends the scrambled DMRS sequences.
Optionally, the DMRS sequences of the multiple terminals are scrambled in units of REG groups, where each REG group includes at least one REG.
Optionally, the scrambling sequence in one REG group is time domain first and frequency domain second or frequency domain first and time domain second.
Optionally, the scrambling DMRS sequences of multiple terminals by the network side device using different OCC sequences, and sending the scrambled DMRS sequences, includes:
and the network side equipment scrambles the respective DMRS sequences by using the OCC sequences associated with each terminal and sends the scrambled DMRS sequences.
Optionally, the OCC sequence associated with each terminal includes:
an OCC sequence associated with the identifier of the network side device or an OCC sequence pre-configured for the network side device.
Optionally, the DMRS sequences of the multiple terminals are scrambled in a time domain, a frequency domain, or a time-frequency domain.
Optionally, the sending, by the network side device, the DMRS sequence of the terminal includes:
and the network side equipment transmits the corresponding DMRS sequences in the REG associated with the terminal.
Optionally, the REG associated with each terminal includes:
the REG associated with the identifier of the network side device or the REG pre-configured for the network side device; and/or
The REGs include frequency domain REGs and/or time domain REGs.
An embodiment of the present invention further provides a terminal, including:
a first obtaining module, configured to obtain a DMRS sequence receiving parameter associated with the terminal;
and the second acquisition module is used for acquiring the DMRS sequence corresponding to the DMRS sequence receiving parameter sent by the network side equipment.
Optionally, the DMRS receiving parameters include an initialization parameter of the DMRS, and the second obtaining module is configured to generate a DMRS prediction sequence using the initialization parameter, and receive, from the DMRS sequence sent by the network side device, the DMRS sequence matched with the DMRS prediction sequence.
Optionally, the initialization parameter is associated with an identifier of the terminal.
Optionally, the DMRS receiving parameter includes an OCC sequence, and the second obtaining module is configured to descramble, by using the OCC sequence associated with the terminal, the scrambled signal sent by the network side device, and obtain the DMRS sequence after descrambling.
Optionally, the OCC sequence associated with the terminal includes:
and the OCC sequence associated with the identifier of the terminal or the OCC sequence pre-configured for the terminal by the network side equipment.
Optionally, the DMRS receiving parameters include REG parameters, and the second obtaining module is configured to determine, according to the REG parameters associated with the terminal, a REG corresponding to the terminal, and obtain, in the REG, a DMRS sequence sent by the network side device to the terminal.
Optionally, the REG associated with the terminal includes:
the REG associated with the identifier of the terminal or the REG configured for the terminal in advance by the network side equipment; and/or
The REGs include frequency domain REGs and/or time domain REGs.
An embodiment of the present invention further provides a network side device, including:
the generating module is used for generating a DMRS sequence of the terminal;
and the transmitting module is used for transmitting the DMRS sequence of the terminal so that the terminal can use the associated DMRS sequence to receive the parameters and acquire the own DMRS sequence.
Optionally, the DMRS sequence of each terminal is generated using the associated initialization parameter.
Optionally, the initialization parameter associated with each terminal is associated with a respective identifier.
Optionally, the sending module is configured to send the DMRS sequence of at least one terminal using the same antenna port.
Optionally, the sending module is configured to scramble DMRS sequences of multiple terminals using different OCC sequences, and send the scrambled DMRS sequences.
Optionally, the DMRS sequences of the multiple terminals are scrambled in units of REG groups, where each REG group includes at least one REG.
Optionally, the scrambling sequence in one REG group is time domain first and frequency domain second or frequency domain first and time domain second.
Optionally, the sending module is configured to scramble the DMRS sequences by using the OCC sequence associated with each terminal, and send the scrambled DMRS sequences.
Optionally, the OCC sequence associated with each terminal includes:
an OCC sequence associated with the identifier of the network side device or an OCC sequence pre-configured for the network side device.
Optionally, the DMRS sequences of the multiple terminals are scrambled in a time domain, a frequency domain, or a time-frequency domain.
Optionally, the sending module is configured to send a corresponding RMRS sequence in the REG associated with the terminal.
Optionally, the REG associated with each terminal includes:
the REG associated with the identifier of the network side device or the REG pre-configured for the network side device; and/or
The REGs include frequency domain REGs and/or time domain REGs.
The technical scheme of the invention at least has the following beneficial effects:
in the embodiment of the invention, a terminal acquires a DMRS sequence receiving parameter associated with the terminal; and the terminal acquires the DMRS sequence corresponding to the DMRS sequence receiving parameter sent by the network side equipment. Compared with the prior art that the DMRS sequences used by the demodulation of the user equipment are obtained according to different antenna ports, the accuracy of distinguishing the DMRS sequences used by the demodulation of the user equipment can be improved.
Drawings
FIG. 1 is a schematic diagram of a network architecture to which embodiments of the present invention may be applied;
fig. 2 is a flowchart of a DMRS sequence determination method according to an embodiment of the present invention;
fig. 3 is a schematic transmission diagram of a DMRS sequence according to an embodiment of the present invention;
fig. 4 is a schematic transmission diagram of another DMRS sequence according to an embodiment of the present invention;
fig. 5 is a schematic transmission diagram of another DMRS sequence according to an embodiment of the present invention;
fig. 6 is a schematic transmission diagram of another DMRS sequence according to an embodiment of the present invention;
fig. 7 is a schematic transmission diagram of another DMRS sequence according to an embodiment of the present invention;
fig. 8 is a schematic transmission diagram of another DMRS sequence according to an embodiment of the present invention;
fig. 9 is a schematic transmission diagram of another DMRS sequence according to an embodiment of the present invention;
fig. 10 is a flowchart of another DMRS sequence determination method according to an embodiment of the present invention;
fig. 11 is a structural diagram of a terminal according to an embodiment of the present invention;
fig. 12 is a structural diagram of a network-side device according to an embodiment of the present invention;
fig. 13 is a block diagram of another terminal according to an embodiment of the present invention;
fig. 14 is a block diagram of another network-side device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic diagram of a network structure applicable to the embodiment of the present invention, and as shown in fig. 1, the network structure includes a terminal 11 and a network-side Device 12, where the terminal 11 may be a terminal-side Device such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that a specific type of the terminal 11 is not limited in the embodiment of the present invention, and the terminal may also be understood as a User Equipment (UE). The terminal 11 may establish communication with the network-side device 12, where the network in the drawing may indicate that the terminal 11 establishes communication with the network-side device 12 wirelessly, and the network-side device 12 may be an evolved Node B (eNB) or another base station, or may be a network-side device such as an access point device, and it should be noted that a specific type of the network-side device 12 is not limited in this embodiment of the present invention.
Referring to fig. 2, fig. 2 is a flowchart of a DMRS sequence determination method according to an embodiment of the present invention, as shown in fig. 2, including the following steps:
201. a terminal acquires a DMRS sequence receiving parameter associated with the terminal;
202. and the terminal acquires the DMRS sequence corresponding to the DMRS sequence receiving parameter sent by the network side equipment.
The DMRS sequence receiving parameter associated with the terminal may be a DMRS sequence receiving parameter associated with an identifier (e.g., UEID) of the terminal, or may be a DMRS sequence receiving parameter configured in advance for the terminal by the network side device. The DMRS sequence reception parameter may be a parameter used for the terminal to receive a DMRS sequence used for demodulation, and may be, for example: initialization parameters for DMRS sequences, OCC sequences, identities of OCC sequences, and/or parameters for REGs, among others. The DMRS sequence receiving parameter may be pre-stored, that is, obtained locally in step 201, or the DMRS sequence receiving parameter may be generated temporarily by the terminal, and the like, which is not limited in this embodiment of the present invention.
After the terminal acquires the DMRS sequence receiving parameters, the terminal may acquire a corresponding DMRS sequence from the DMRS sequence transmitted by the network side device, that is, acquire the DMRS sequence used by the terminal for demodulation. Then, the terminal may demodulate a signal of the downlink control channel using the DMRS sequence.
It should be noted that the terminal may be any terminal in a communication system, that is, each terminal may acquire the DMRS sequence used for self-demodulation by using the method, and each terminal may accurately acquire the DMRS sequence used for self-demodulation.
Optionally, the DMRS receiving parameters include DMRS initialization parameters, and the obtaining, by the terminal, a DMRS sequence corresponding to the DMRS sequence receiving parameters sent by the network side device includes:
and the terminal generates a DMRS prediction sequence by using the initialization parameter, and selects a DMRS sequence matched with the DMRS prediction sequence from the DMRS sequences transmitted by the network side equipment.
The initialization parameter associated with the terminal may be an initialization parameter associated with the identifier of the terminal, or the initialization parameter associated with the terminal may be an initialization parameter negotiated by the terminal and the network side device in advance, or configured by the network side device for the terminal in advance.
The selection of the DMRS sequence matched with the DMRS prediction sequence may be that the terminal generates an estimated DMRS sequence by using the correspondence between the initialization parameter and the DMRS sequence acquired in advance, and selects a DMRS with the highest matching degree or the same matching degree from the DMRS sequences transmitted by the network side device. For example: for MU-MIMO transmission, a DMRS sequence that matches the DMRS prediction sequence may be selected from among a plurality of DMRS sequences transmitted by a network device, and the selected DMRS sequence may be used as a DMRS sequence used by the terminal to demodulate the downlink control channel. In this embodiment, the terminal can acquire the DMRS sequence for demodulating the downlink control channel by using the initialization parameter associated with the terminal, so that when the DMRS sequences of multiple terminals are transmitted by the network side device, each terminal can select the DMRS sequence for demodulating the downlink control channel by itself, because each terminal selects the DMRS sequence matched with the prediction sequence generated by itself.
In addition, it should be noted that the network side device may generate DMRS sequences of multiple terminals, and the DMRS sequence of each terminal is generated by using the associated initialization parameter, so that the DMRS sequence of each terminal generated by the network side device and the associated initialization parameter may be guaranteed, where the DMRS sequence may be generated according to a correspondence between the initialization parameter and the DMRS sequence, or the DMRS sequence may be obtained by performing a preset operation on the initialization parameter, and the embodiment of the present invention is not limited thereto. For example: and generating the DMRS sequence of the terminal A by using the initialization parameter associated with the terminal A, and generating the DMRS sequence of the terminal B by using the initialization parameter associated with the terminal B, so that the terminal A and the terminal B can accurately acquire the DMRS sequence used by the self-demodulation downlink control channel. The DMRS sequence may be generated according to a correspondence between the initialization parameter and the DMRS sequence, or may be obtained by performing a preset operation on the initialization parameter, and the embodiment of the present invention is not limited thereto.
For example: one REG consists of 12 consecutive subcarriers on one OFDM symbol, and each REG includes 4 Resource Elements (REs) REs of one antenna port (antenna port). When multiple terminals perform MU-MIMO transmission, DMRSs of different terminals are transmitted on the same port. When generating the DMRS sequence corresponding to each terminal, the network side device may scramble the DMRS sequences using the UE ID of the terminal, so that the DMRS sequences of different terminals are quasi-orthogonal to each other. When receiving the downlink control channel, the terminal can acquire the DMRS sequence related to itself according to its UE ID. Suppose two terminal pairs (pair) are together performing MU-MIMO transmission, with UE ID1 and UE ID2 for both. When the base station generates the DMRSs of the UE1 and the UE2, the base station scrambles the DMRS sequences by using the UE IDs of the UE1 and the UE2, as follows:
DMRS sequence for UE 1:
Figure BDA0001284380460000081
initialization parameters associated with the UE 1:
Figure BDA0001284380460000083
DMRS sequence for UE 1:
Figure BDA0001284380460000082
initialization parameters associated with the UE 1:
Figure BDA0001284380460000084
wherein n isIDID, n indicating a network-side devicesIndicating slot number, IDue2Is ID, ID of UE2ue1Is the ID of the UE 1.
Thus UE1 and UE2 are at the same nIDReceiving DMRS on the antenna port (antenna port) and distinguishing DMRS sequences according to the difference of the initial values of the two to obtain the DMRS sequences used by the respective demodulation downlink control channels
It should be noted that, in the embodiment of the present invention, no limitation is made on the type of the DMRS sequence, and the DMRS sequence may be generated by a base sequence of another type, which is not limited to the embodiment of the present invention.
Optionally, the DMRS receiving parameter includes an OCC sequence, and the obtaining, by the terminal, a DMRS sequence corresponding to the DMRS sequence receiving parameter sent by the network side device includes:
and the terminal descrambles the scrambled signal sent by the network side equipment by using the OCC sequence associated with the terminal to obtain a descrambled DMRS sequence.
In this embodiment, the terminal may descramble the scrambled signal sent by the network side device by using the associated OOC sequence to obtain a DMRS sequence after descrambling, that is, the DMRS sequence that is successfully descrambled is the DMRS sequence used by the terminal to demodulate the downlink control channel. Therefore, each terminal can descramble the scrambled signal sent by the network side equipment by using the OCC sequence associated with the terminal to obtain the DMRS sequence used by the terminal to demodulate the downlink control channel. For example: the network side device may scramble DMRS sequences of multiple terminals using different OCC sequences, and transmit the scrambled DMRS sequences. For example: the network side equipment scrambles respective DMRS sequences by using the OCC sequence associated with each terminal, and sends the scrambled DMRS sequences, for example, the terminal A associated OCC sequence is used for scrambling the DMRS sequence of the terminal A, so that the DMRS sequence can only be descrambled by the terminal A; and scrambling the DMRS sequence of the terminal B by using the OCC sequence associated with the terminal B, so that the DMRS sequence can only be descrambled by the terminal B.
Optionally, the OCC sequence associated with the terminal includes:
and the OCC sequence associated with the identifier of the terminal or the OCC sequence pre-configured for the terminal by the network side equipment.
The OCC sequence associated with the identifier of the terminal may be implicitly determined according to the UE id, for example, the OCC corresponding to the terminal is determined by a formula mod (UE id, N). For example, a total of N ═ 4 OCC sequences, each numbered { OCC0OCC1OCC2OCC3 }. The terminal determines the corresponding OCC number by mod (UE id, 4). For example, if UE id is 13, the corresponding OCC is numbered 1, i.e., OCC 1. The OCC sequence pre-configured for the terminal by the network side device may be configured through a high-level signaling, for example: the embodiment of the present invention is not limited by RCC signaling or UE-specific signaling.
Optionally, when the network side device scrambles the DMRS sequences, the DMRS sequences of the terminal may be scrambled in units of REG groups, where each REG group includes at least one REG, and for MU-MIMO transmission, the DMRS sequences of the multiple terminals may be scrambled in units of REG groups.
In addition, the order of scrambling within one REG group may be time domain first and frequency domain second or frequency domain first and time domain second. Therefore, the flexibility of the system can be improved to meet the requirements of various services. And when the network side device scrambles the DMRS sequences, the network side device may scramble the DMRS sequences of the multiple terminals in a time domain, a frequency domain, or a time-frequency domain. That is, in the embodiment of the present invention, the OCC may be applied to a time domain, a frequency domain, or a time-frequency domain. For example: each REG is assumed to consist of 12 consecutive subcarriers on one OFDM symbol, and each REG contains 4 DMRS REs, where the 4 DMRS REs are REs of one antenna port. As shown in fig. 3, OCCs (1 or more REGs) may be superimposed on each frequency domain, or superimposed on the time domain, where fig. 3 exemplifies two REGs consecutive in the time domain; or, the OCC is superimposed on the time domain and the frequency domain, where here, the OCC may be a time domain first or a frequency domain first, and two consecutive REGs in the time domain are taken as an example in fig. 3.
Optionally, the DMRS receiving parameters include REG parameters, and the obtaining, by the terminal, the DMRS sequence corresponding to the DMRS sequence receiving parameters sent by the network side device includes:
and the terminal determines the REG corresponding to the terminal according to the REG parameter associated with the terminal, and acquires the DMRS sequence sent to the terminal by the network side equipment in the REG.
In this embodiment, the terminal may receive, according to its associated REG parameter, the DMRS sequence sent by the network side device to the terminal on the corresponding REG. Thus, each terminal can receive the DMRS sequence sent by the network side device on the respective corresponding REG, for example: the network side device may send respective RMRS sequences in the REGs associated with each terminal. In the network side device, the network side device may map DMRS sequences used by downlink control channels of different terminals to different REGs in a frequency domain. Assume that there is only one antenna port, each antenna port containing 4 REs within one REG. The one REG is 12 subcarriers consecutive on one OFDM symbol. DMRS sequences used by downlink control channels of different terminals are mapped on different REGs according to the UE ID.
Optionally, the REG associated with the terminal includes:
the REG associated with the identifier of the terminal or the REG configured for the terminal in advance by the network side equipment; and/or
The REGs include frequency domain REGs and/or time domain REGs.
For example, according to the number N of terminals performing MU-MIMO transmission by pairing, the number M of REGs in the downlink control channel resource, and the UE ID, the REG number where the DMRS sequence used by the downlink control channel of the terminal is transmitted is determined as: REG index is mod (mod (UE ID + O, N), M), where O is 0, N,2N, … M. For example, if N is 2, M is 8, UE ID of terminal 1 is 1, and UE ID of terminal 2 is 2, DMRS of terminal 1 is transmitted on REG { 1357 } and DMRS of terminal 2 is transmitted on REG { 2468 }. In addition, the REG pre-configured for the terminal by the network side device may be a REG location where the terminal transmits the DMRS through a higher layer signaling by the network side, or may be a signaling or a message sent to the terminal by another network side device, which is not limited in this embodiment of the present invention.
Fig. 4 shows that the DMRS sequence of UE1 is transmitted on REG n, and the DMRS sequence of UE2 is transmitted on REG n + 1.
In addition, in this embodiment, the REGs corresponding to the terminal may include frequency-domain REGs and/or time-domain REGs. In this way, the DMRS sequences used by the downlink control channels of different terminals may be mapped on different REGs in the frequency domain, or in the frequency domain and the time domain. Assume that there is only one antenna port, each antenna port containing 4 REs within one REG. The one REG is 12 subcarriers consecutive on one OFDM symbol. DMRS sequences used by downlink control channels of different terminals are mapped on different REGs according to the UE ID. The transmission position of the DMRS used for downlink control channel demodulation is determined by a predefined rule, for example, as described above, a function related to the UE ID or a notification from the network side device. Assuming that a downlink control channel transmission resource region has 6 REGs and the downlink control channels of two terminals perform MU-MIMO transmission in the resource region, an example can be shown in fig. 5. The DMRS of UE1 is transmitted at REG { 135 } and the DMRS of UE2 is transmitted at REG { 246 }.
It should be noted that, in the embodiment of the present invention, the above-described manners of DMRS sequences for multiple transmission terminals may be implemented by combining with each other or by themselves, for example: the DMRS sequences transmitted on different REGs may be DMRS sequences generated by the network side device according to initialization parameters associated with each terminal.
The following are illustrated by several specific examples:
example 1: assume that one REG consists of 12 consecutive REs on one OFDM symbol, and each REG contains 4 AP REs of one antenna port. When network side equipment pairs a plurality of terminals together for MU-MIMO transmission, different OCC sequences are used for scrambling by DMRS sequences used by different terminals. When the DMRS sequence is scrambled, REGgroup is used as a unit. In this embodiment, it is assumed that one REG group contains only one REG. The type of OCC sequence may be a frequency domain OCC, a time domain OCC, or a time-frequency domain OCC. Taking the above assumption as an example, when the frequency domain OCC is used, the OCC sequence length is 4, and thus there are 4 OCC sequences at maximum. If the time domain OCC is adopted and two REGs are used as the time domain OCC in the time domain, the length of the OCC sequence is 2 and at most 2 mutually orthogonal OCC sequences exist; if the OCC sequence scrambles the DMRS sequence in the time-frequency domain, it is related to the number of DMRS REs existing in REGgroup, for example, two REGs are included in one REGgroup, and 4 DMRS REs are included in each REG, the length of the OCC sequence is 8, and at most 8 mutually orthogonal OCC sequences exist. A schematic diagram of this example can be seen in fig. 6.
And the terminal can determine through which OCC sequence the own DMRS sequence is scrambled according to different modes. For example: and the terminal determines an OCC sequence used by DMRS scrambling according to the UE ID of the terminal. For example, if the number of OCC sequences whose OCCs are orthogonal to each other is N and the number is {0,1,2, …, N-1}, the number of OCC sequences used for DMRS scrambling of the terminal is mod (UEID, N); or, the network side device configures the OCC sequence number corresponding to the terminal through a higher layer signaling, for example, through an RRC signaling. It should be noted that, in the embodiment of the present invention, the length, the number, and the scrambling order of the OCC sequence are not limited in any way.
Example 2: assume that one REG consists of 12 consecutive REs on one OFDM symbol, and each REG contains 4 AP REs of one antenna port. When network side equipment pairs a plurality of terminals together for MU-MIMO transmission, different OCC sequences are used for scrambling by DMRS sequences used by different terminals. When the DMRS sequence is scrambled, REGgroup is used as a unit. In this embodiment, it is assumed that one REG group contains only 2 REGs. Since 8 DMRS REs are contained in one REG group, the length of the OCC sequence is 8, and there are at most 8 mutually orthogonal OCC sequences. An example of a frequency domain OCC is shown in fig. 7. In addition, when the OCC sequence is used to scramble the DMRS, the DMRS may be scrambled before the time domain and then the frequency domain or after the frequency domain and then the time domain. Further, in the embodiment of the present invention, no limitation is made on the size of the REG group.
Example 3: it is assumed that one REG consists of 12 consecutive subcarriers on one OFDM symbol, and each REG contains 4 REs of one antenna port. When multiple terminals perform MU-MIMO transmission, DMRSs of different terminals are transmitted on the same port. In specific transmission, DMRSs corresponding to different terminals are transmitted on different REGs. For example, assume that a downlink control channel resource set contains 3 OFDM symbols in the time domain and 6 REGs. And assume that two terminals are paired for MU-MIMO transmission. The 6 REGs are numbered sequentially as { 012345 }. And the terminal determines that the own DMRS is transmitted in the REGs according to the UE ID of the terminal, the UE number transmitted by the pair, the REG number in the control channel resource set and the like. Specifically, for example, by the formula REG index mod (mod (UE ID + O, N), M), where O is 0,2, 4. For example, N ═ 2, M ═ 6, UE ID1 ═ 0, UE ID2 ═ 1, UE1 determines that its corresponding DMRS sequence is transmitted in REG { 024 }, and UE2 determines that its corresponding DMRS sequence is transmitted in REG { 135 }. A specific example is shown in fig. 8. Of course, in the embodiment of the present invention, the REG numbering principle in the channel resource set under downlink control is not limited at all. Optionally, the terminal may determine the REG number where the DMRS is transmitted according to a higher layer signaling sent by the network side device. Taking the above example as an example, the network side device notifies the UE1 through higher layer signaling that the DMRS corresponding to the downlink control channel is transmitted in REG { 024 }, and the network side device notifies the UE2 through higher layer signaling that the DMRS corresponding to the downlink control channel is transmitted in REG { 135 }.
As another example, when multiple terminals are paired for MU-MIMO transmission, DMRSs of different terminals are transmitted in REGs that are different in frequency domain position. As a specific example, for example, if the downlink control channel is transmitted on one OFDM symbol and only two terminals are paired for MU-MIMO transmission, DMRSs corresponding to the UE1 and the UE2 are transmitted on different REGs. The specific method for determining the REG number for transmitting the DMRS may be determined by the above formula or by higher layer signaling sent by the base station. This may be particularly shown in figure 9.
In the embodiment of the invention, a terminal acquires a DMRS sequence receiving parameter associated with the terminal; and the terminal acquires the DMRS sequence corresponding to the DMRS sequence receiving parameter sent by the network side equipment. Compared with the prior art that the DMRS sequences used by the demodulation of the user equipment are obtained according to different antenna ports, the accuracy of distinguishing the DMRS sequences used by the demodulation of the user equipment can be improved.
Referring to fig. 10, fig. 10 is a flowchart of another DMRS sequence determination method according to an embodiment of the present invention, as shown in fig. 10, including:
1001. the method comprises the steps that network side equipment generates a DMRS sequence of a terminal;
1002. and the network side equipment transmits the DMRS sequence of the terminal so that the terminal can use the associated DMRS sequence to receive the parameters and acquire the own DMRS sequence.
It should be noted that, in this embodiment, the network side device may generate DMRS sequences of one or more terminals and transmit the DMRS sequences of one or more terminals. That is, in the present embodiment, the present invention may be applied to an MU-MIMO scenario or a non-MU-MIMO scenario. When there are multiple terminals, the implementation for each terminal may be the same.
Optionally, the DMRS sequence of each terminal is generated using the associated initialization parameter.
Optionally, the initialization parameter associated with each terminal is associated with a respective identifier.
Optionally, the sending, by the network side device, the DMRS sequence of the terminal includes:
and the network side equipment transmits the DMRS sequence of at least one terminal by using the same antenna port.
Here, at least one terminal includes the terminal in step 1001.
Optionally, the sending, by the network side device, the DMRS sequence of the terminal includes:
and the network side equipment scrambles the DMRS sequences of the plurality of terminals by using different OCC sequences and sends the scrambled DMRS sequences.
Here, the multi-terminal includes the terminal in step 1001.
Optionally, the DMRS sequences of the multiple terminals are scrambled in units of REG groups, where each REG group includes at least one REG.
Optionally, the scrambling sequence in one REG group is time domain first and frequency domain second or frequency domain first and time domain second.
Optionally, the scrambling DMRS sequences of multiple terminals by the network side device using different OCC sequences, and sending the scrambled DMRS sequences, includes:
and the network side equipment scrambles the respective DMRS sequences by using the OCC sequences associated with each terminal and sends the scrambled DMRS sequences.
Optionally, the OCC sequence associated with each terminal includes:
an OCC sequence associated with the identifier of the network side device or an OCC sequence pre-configured for the network side device.
Optionally, the DMRS sequences of the multiple terminals are scrambled in a time domain, a frequency domain, or a time-frequency domain.
Optionally, the sending, by the network side device, the DMRS sequence of the terminal includes:
and the network side equipment transmits the corresponding DMRS sequences in the REG associated with the terminal.
Optionally, the REG associated with each terminal includes:
the REG associated with the identifier of the network side device or the REG pre-configured for the network side device; and/or
The REGs include frequency domain REGs and/or time domain REGs.
It should be noted that, this embodiment is used as an implementation of the network side device corresponding to the embodiment shown in fig. 2, and specific implementation thereof may refer to the relevant description of the embodiment shown in fig. 2, so that, in order to avoid repeated description, the embodiment is not described again, and the same beneficial effects may also be achieved.
Referring to fig. 11, fig. 11 is a structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 9, a terminal 1100 includes:
a first obtaining module 1101, configured to obtain a DMRS sequence reception parameter associated with the terminal;
a second obtaining module 1102, configured to obtain a DMRS sequence corresponding to the DMRS sequence receiving parameter sent by the network side device.
Optionally, the DMRS receiving parameters include an initialization parameter of a DMRS, and the second obtaining module 1102 is configured to generate a DMRS prediction sequence by using the initialization parameter, and receive, from the DMRS sequence sent by the network side device, a DMRS sequence matched with the DMRS prediction sequence.
Optionally, the initialization parameter is associated with an identifier of the terminal.
Optionally, the DMRS receiving parameter includes an OCC sequence, and the second obtaining module 1102 is configured to descramble, by using the OCC sequence associated with the terminal, the scrambled signal sent by the network side device, and obtain the DMRS sequence after descrambling.
Optionally, the OCC sequence associated with the terminal includes:
and the OCC sequence associated with the identifier of the terminal or the OCC sequence pre-configured for the terminal by the network side equipment.
Optionally, the DMRS receiving parameters include REG parameters, and the second obtaining module 1102 is configured to determine, according to the REG parameters associated with the terminal, a REG corresponding to the terminal, and obtain, in the REG, a DMRS sequence sent by the network side device to the terminal.
Optionally, the REG associated with the terminal includes:
the REG associated with the identifier of the terminal or the REG configured for the terminal in advance by the network side equipment; and/or
The REGs include frequency domain REGs and/or time domain REGs.
It should be noted that, in this embodiment, the terminal 1100 may be a terminal of any implementation manner in the method embodiment of the present invention, and any implementation manner of the terminal in the method embodiment of the present invention may be implemented by the terminal 1100 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.
Referring to fig. 12, fig. 12 is a structural diagram of another network-side device according to an embodiment of the present invention, and as shown in fig. 12, a network-side device 1200 includes:
a generating module 1201, configured to generate a DMRS sequence for a terminal;
a sending module 1202, configured to send the DMRS sequence of the terminal, so that the terminal obtains the DMRS sequence of the terminal by using the DMRS sequence receiving parameter associated with the terminal.
Optionally, the DMRS sequence of each terminal is generated using the associated initialization parameter.
Optionally, the initialization parameter associated with each terminal is associated with a respective identifier.
Optionally, the sending module 1202 is configured to send the DMRS sequence of at least one terminal using the same antenna port.
Optionally, the sending module 1202 is configured to scramble DMRS sequences of multiple terminals by using different OCC sequences, and send the scrambled DMRS sequences.
Optionally, the DMRS sequences of the multiple terminals are scrambled in units of REG groups, where each REG group includes at least one REG.
Optionally, the scrambling sequence in one REG group is time domain first and frequency domain second or frequency domain first and time domain second.
Optionally, the sending module 1202 is configured to scramble the DMRS sequences by using the OCC sequence associated with each terminal, and send the scrambled DMRS sequences.
Optionally, the OCC sequence associated with each terminal includes:
an OCC sequence associated with the identifier of the network side device or an OCC sequence pre-configured for the network side device.
Optionally, the DMRS sequences of the multiple terminals are scrambled in a time domain, a frequency domain, or a time-frequency domain.
Optionally, the sending module 1202 is configured to send a corresponding RMRS sequence in the REG associated with the terminal.
Optionally, the REG associated with each terminal includes:
the REG associated with the identifier of the network side device or the REG pre-configured for the network side device; and/or
The REGs include frequency domain REGs and/or time domain REGs.
It should be noted that, in this embodiment, the network-side device 1200 may be a network-side device according to any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device 1200 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.
Referring to fig. 13, fig. 13 is a structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 13, the terminal includes: a processor 1300, a transceiver 1310, a memory 1320, a user interface 1330, and a bus interface, wherein:
a processor 1300, for reading the program in the memory 1320, for executing the following processes:
acquiring DMRS sequence receiving parameters associated with the terminal;
and acquiring the DMRS sequence corresponding to the DMRS sequence receiving parameter sent by the network side equipment.
Among other things, the transceiver 1310 is used for receiving and transmitting data under the control of the processor 1300.
In fig. 13, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1300 and various circuits of memory represented by memory 1320 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1310 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. User interface 1330 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1320 may store data used by the processor 1300 in performing operations.
Optionally, the obtaining the DMRS sequence receiving parameter sent by the network side device and corresponding to the DMRS sequence includes:
and generating a DMRS prediction sequence by using the initialization parameter, and receiving the DMRS sequence matched with the DMRS prediction sequence in the DMRS sequences transmitted by the network side equipment.
Optionally, the initialization parameter is associated with an identifier of the terminal.
Optionally, the obtaining of the DMRS sequence receiving parameter sent by the network side device corresponds to a DMRS sequence, where the DMRS receiving parameter includes an OCC sequence, and the obtaining includes:
and descrambling the scrambled signal sent by the network side equipment by using the OCC sequence associated with the terminal to obtain a descrambled DMRS sequence.
Optionally, the OCC sequence associated with the terminal includes:
and the OCC sequence associated with the identifier of the terminal or the OCC sequence pre-configured for the terminal by the network side equipment.
Optionally, the obtaining of the DMRS sequence receiving parameter sent by the network side device corresponds to a DMRS sequence includes:
and determining the REG corresponding to the terminal according to the REG parameters associated with the terminal, and acquiring the DMRS sequence sent by the network side equipment to the terminal in the REG.
Optionally, the REG associated with the terminal includes:
the REG associated with the identifier of the terminal or the REG configured for the terminal in advance by the network side equipment; and/or
The REGs include frequency domain REGs and/or time domain REGs.
It should be noted that, the terminal in this embodiment may be the terminal in the embodiment shown in fig. 1 to 10, and any implementation of the terminal in the embodiment shown in fig. 1 to 10 may be implemented by the terminal in this embodiment to achieve the same beneficial effects, which is not described herein again.
Referring to fig. 14, fig. 14 is a structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 14, the network device includes: a processor 1400, a transceiver 1410, a memory 1420, a user interface 1430, and a bus interface, wherein:
the processor 1400 is used for reading the program in the memory 1420 and executing the following processes:
generating a DMRS sequence of a terminal;
and transmitting the DMRS sequence of the terminal through a transceiver 1410, so that the terminal receives the parameters by using the associated DMRS sequence to acquire the own DMRS sequence.
Among other things, the transceiver 1410 is used for receiving and transmitting data under the control of the processor 1400.
In fig. 14, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1400 and various circuits of memory represented by memory 1420 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1410 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 1430 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 1400 is responsible for managing the bus architecture and general processing, and the memory 1420 may store data used by the processor 1400 in performing operations.
Optionally, the DMRS sequence of each terminal is generated using the associated initialization parameter.
Optionally, the initialization parameter associated with each terminal is associated with a respective identifier.
Optionally, the DMRS sequence of the transmitting terminal includes:
the DMRS sequences of at least one terminal are transmitted using the same antenna port.
Optionally, the sending the DMRS sequence for the terminal includes:
and scrambling DMRS sequences of a plurality of terminals by using different OCC sequences, and transmitting the scrambled DMRS sequences.
Optionally, the DMRS sequences of the multiple terminals are scrambled in units of REG groups, where each REG group includes at least one REG.
Optionally, the scrambling sequence in one REG group is time domain first and frequency domain second or frequency domain first and time domain second.
Optionally, the scrambling DMRS sequences of multiple terminals using different OCC sequences, and sending the scrambled DMRS sequences include:
and scrambling respective DMRS sequences by using the OCC sequence associated with each terminal, and transmitting the scrambled DMRS sequences.
Optionally, the OCC sequence associated with each terminal includes:
an OCC sequence associated with the identifier of the network side device or an OCC sequence pre-configured for the network side device.
Optionally, the DMRS sequences of the multiple terminals are scrambled in a time domain, a frequency domain, or a time-frequency domain.
Optionally, the sending the DMRS sequence for the terminal includes:
and transmitting the corresponding DMRS sequence in the REG associated with the terminal.
Optionally, the REG associated with each terminal includes:
the REG associated with the identifier of the network side device or the REG pre-configured for the network side device; and/or
The REGs include frequency domain REGs and/or time domain REGs.
It should be noted that, in this embodiment, the network-side device may be the network-side device in the embodiments shown in fig. 1 to 10, and any implementation of the network-side device in the embodiments shown in fig. 1 to 10 may be implemented by the network-side device in this embodiment to achieve the same beneficial effects, and details are not repeated here.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (22)

1. A method for determining a demodulation reference signal (DMRS) sequence is characterized by comprising the following steps:
a terminal acquires a DMRS sequence receiving parameter associated with the terminal;
the terminal acquires a DMRS sequence sent by network side equipment, wherein the DMRS sequence is a DMRS sequence corresponding to the DMRS sequence receiving parameter;
the method for acquiring the DMRS sequence transmitted by the network side equipment by the terminal comprises the following steps:
under the condition that the DMRS receiving parameters comprise initialization parameters of the DMRS, the terminal generates a DMRS prediction sequence by using the initialization parameters, and receives the DMRS sequence matched with the DMRS prediction sequence in the DMRS sequence transmitted by the network side equipment, wherein the initialization parameters are associated with the identification of the terminal; or
Under the condition that the DMRS receiving parameters comprise Orthogonal Cover Code (OCC) sequences, the terminal uses the OCC sequences associated with the terminal to descramble scrambled signals sent by the network side equipment, and the descrambled DMRS sequences are obtained; or
And under the condition that the DMRS receiving parameters comprise Resource Element Group (REG) parameters, the terminal determines the REG corresponding to the terminal according to the REG parameters associated with the terminal, and acquires the DMRS sequence sent to the terminal by the network side equipment in the REG.
2. The method of claim 1, wherein the OCC sequence associated with the terminal comprises:
and the OCC sequence associated with the identifier of the terminal or the OCC sequence pre-configured for the terminal by the network side equipment.
3. The method of claim 1, wherein the terminal-associated REG comprises:
the REG associated with the identifier of the terminal or the REG configured for the terminal in advance by the network side equipment; and/or
The REGs include frequency domain REGs and/or time domain REGs.
4. A method for determining a DMRS sequence, comprising:
the method comprises the steps that network side equipment generates a DMRS sequence of a terminal;
the network side equipment sends the DMRS sequence of the terminal so that the terminal can use the associated DMRS sequence to receive the parameters and obtain the own DMRS sequence;
the DMRS sequence of each terminal is generated by using the associated initialization parameter, and the associated initialization parameter of each terminal is associated with the identifier of each terminal;
or, the sending, by the network side device, the DMRS sequence of the terminal includes: the network side equipment scrambles respective DMRS sequences by using OCC sequences associated with each terminal and sends the scrambled DMRS sequences;
or, scrambling the DMRS sequences of the plurality of terminals in units of REG groups, the REG groups including at least one REG.
5. The method of claim 4, wherein the network side device transmitting the DMRS sequence of the terminal comprises:
and the network side equipment transmits the DMRS sequence of at least one terminal by using the same antenna port.
6. The method of claim 4, wherein an order of scrambling within one REG group is time domain first followed by frequency domain or frequency domain first followed by time domain.
7. The method of claim 4, wherein the OCC sequence associated with each terminal comprises:
an OCC sequence associated with the identifier of the network side device or an OCC sequence pre-configured for the network side device.
8. The method of claim 4, wherein the DMRS sequences for the plurality of terminals are scrambled in a time domain, a frequency domain, or a time-frequency domain.
9. The method of claim 4, wherein the network side device transmitting the DMRS sequence of the terminal comprises:
and the network side equipment transmits the corresponding DMRS sequences in the REG associated with the terminal.
10. The method of claim 9, wherein each terminal-associated REG comprises:
the REG associated with the identifier of the network side device or the REG pre-configured for the network side device; and/or
The REGs include frequency domain REGs and/or time domain REGs.
11. A terminal, comprising:
a first obtaining module, configured to obtain a DMRS sequence receiving parameter associated with the terminal;
the second acquisition module is used for acquiring a DMRS sequence sent by network side equipment, wherein the DMRS sequence is a DMRS sequence corresponding to the DMRS sequence receiving parameter;
the DMRS receiving parameters comprise initialization parameters of the DMRS, the second obtaining module is used for generating a DMRS prediction sequence by using the initialization parameters, receiving the DMRS sequence matched with the DMRS prediction sequence in the DMRS sequence sent by the network side equipment, and the initialization parameters are associated with the identifier of the terminal; or
The DMRS receiving parameter includes an OCC sequence, and the second obtaining module is configured to descramble a scrambled signal sent by the network side device by using the OCC sequence associated with the terminal, to obtain a descrambled DMRS sequence; or
The DMRS receiving parameters include REG parameters, and the second obtaining module is configured to determine, according to the REG parameters associated with the terminal, a REG corresponding to the terminal, and obtain, in the REG, a DMRS sequence sent by the network side device to the terminal.
12. The terminal of claim 11, wherein the OCC sequence associated with the terminal comprises:
and the OCC sequence associated with the identifier of the terminal or the OCC sequence pre-configured for the terminal by the network side equipment.
13. The terminal of claim 11, wherein the terminal-associated REG comprises:
the REG associated with the identifier of the terminal or the REG configured for the terminal in advance by the network side equipment; and/or
The REGs include frequency domain REGs and/or time domain REGs.
14. A network-side device, comprising:
the generating module is used for generating a DMRS sequence of the terminal;
the transmitting module is used for transmitting the DMRS sequence of the terminal so that the terminal can use the associated DMRS sequence to receive the parameters and obtain the own DMRS sequence;
the DMRS sequence of each terminal is generated by using the associated initialization parameter, and the associated initialization parameter of each terminal is associated with the identifier of each terminal; or
Or, the transmitting module is configured to scramble respective DMRS sequences using the OCC sequence associated with each terminal, and transmit the scrambled DMRS sequences; or
Scrambling DMRS sequences of the plurality of terminals in units of REG groups, the REG groups including at least one REG.
15. The network-side device of claim 14, wherein the DMRS sequence for each terminal is generated using respective associated initialization parameters.
16. The network-side device of claim 15, wherein each terminal-associated initialization parameter is associated with a respective identity.
17. The network-side device of claim 14, wherein the transmitting module is configured to transmit the DMRS sequence for at least one terminal using a same antenna port.
18. The network-side device of claim 14, wherein an order of scrambling within one REG group is either time domain first and frequency domain second or frequency domain first and time domain second.
19. The network-side device of claim 14, wherein the OCC sequence associated with each terminal comprises:
an OCC sequence associated with the identifier of the network side device or an OCC sequence pre-configured for the network side device.
20. The network-side device of claim 14, wherein the DMRS sequences for the plurality of terminals are scrambled in a time domain, a frequency domain, or a time-frequency domain.
21. The network-side device of claim 14, wherein the means for transmitting is configured to transmit a corresponding RMRS sequence in the terminal-associated REG.
22. The network-side device of claim 21, wherein each terminal-associated REG comprises:
the REG associated with the identifier of the network side device or the REG pre-configured for the network side device; and/or
The REGs include frequency domain REGs and/or time domain REGs.
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"DMRS sequences for ePDCCH";Huawei 等;《3GPP TSG RAN WG1 meeting #68 R1-120045》;20120210;全文 *
"E-PDCCH design aspects related to reference signals";NEC Group;《3GPP TSG RAN WG1 Meeting #68，R1-120254》;20120131;全文 *
"Way Forward on E-PDCCH Reference Signals ";LG Electronics 等;《3GPP TSG RAN WG1 #68 R1-120905》;20120210;全文 *

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