WO2015100960A1

WO2015100960A1 - Method and device for sending and receiving network auxiliary signalling

Info

Publication number: WO2015100960A1
Application number: PCT/CN2014/080195
Authority: WO
Inventors: 王瑜新; 孙云锋; 弓宇宏; 李儒岳; 鲁照华; 邬华明
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-12-30
Filing date: 2014-06-18
Publication date: 2015-07-09
Also published as: CN104754537B; CN104754537A

Abstract

A method and device for sending and receiving network auxiliary signalling. The method comprises: sending, by a first base station, downlink control signalling through a physical downlink control channel or an enhanced physical downlink control channel, wherein information carried by the downlink control signalling at least comprises: information indicating whether a scheduling user exists and/or information indicating a downlink transmission parameter of the scheduling user. In the embodiments of the present invention, a downlink control signalling is directly sent to a user terminal by a first base station without being sent by a base station of a cell where the user terminal is located, thereby reducing the signalling overhead of an X2 interface.

Description

Method and device for transmitting and receiving network auxiliary signaling

Technical field

The present invention relates to mobile communication technologies, and more particularly to a method and apparatus for transmitting and receiving network assisted signaling. Background technique

Inter-cell interference is an inherent problem in cellular mobile communication systems. The traditional solution is to use frequency reuse to avoid interference between adjacent cells by letting neighboring cells use different carrier frequencies. In the Orthogonal Frequency Division Multiplexing (OFDM) system, the frequency reuse coefficient is 1, that is, the neighboring cells use the same carrier frequency, and the inter-cell interference problem is also more than the traditional frequency reuse. The system is complicated. Long Term Evolution (LTE) is a system based on OFDM technology. It mainly uses inter-cell interference randomization, interference avoidance and coordination techniques to solve the interference problem. It is transmitted on the transmitting side through network-side precoding and cooperative scheduling. Avoid interference avoidance. However, the interference coordination based on the sender largely depends on the accuracy of the channel state information (CSI) of the feedback. Due to the limitation of feedback signaling overhead and the delay of feedback processing, the delay of the backhaul link also greatly affects the effect of inter-cell cooperation. Currently, the LTE system based on the method of interference coordination at the transmitting end cannot completely solve the interference problem. How to effectively eliminate and suppress interference between cells and between users is an important direction for further effective improvement of spectrum efficiency. In the LTE system, the common reference signal (CRS, Common Reference Signal) is used for pilot measurement and data demodulation, that is, all users use CRS for channel estimation. In the CRS-based precoding processing mode, the transmitting end needs to additionally notify the receiving end of the specific precoding matrix (also referred to as precoding weight) information used for data transmission, and the overhead of the pilot is large. In addition, in a multi-user multi-input multi-output (MU-MIMO) system, since multiple terminals use the same CRS, pilot orthogonality cannot be achieved, and therefore, Estimated interference.

In an Enhanced Long Term Evolution (LTE-A) system, in order to reduce pilot overhead and improve channel estimation accuracy, pilot measurement and data demodulation functions are separated. Two types of reference signals, namely, a Demodulation Reference Signal (DMRS) and a Channel State Information Reference Signal (CSI-RS, Channel State Information Referenced Signal), are defined. The CSI-RS is mainly used for channel measurement to obtain channel quality information (CQI, Channel Quality Information) and feedback, so that the base station side can use the information to complete user scheduling and implement modulation coding mode (MCS, Modulation and Coding Scheme). For the allocation of the CSI-RS, the pre-coding information is not carried in the transmission of the CSI-RS; and the DMRS is mainly used for the Physical Downlink Shared Channel (PDSCH) and the Enhanced Physical Downlink Control Channel (ePDCCH). Channel estimation to complete demodulation of the data/control channel, the transmission of the DMRS carries precoding information of the corresponding PDSCH/ePDCCH. LTE and LTE-A systems can be classified into Frequency Division Duplex (FDD) and Time Division Duplex (TDD) systems according to the uplink and downlink duplex modes. CSI-RS and FDD and TDD systems are used. The pattern of the DMRS will vary.

In the advanced receiver research at the receiving end, advanced receivers can be mainly divided into several types: Minimum Mean Square Error-Interference Rejection Combining (MMSE-IRC, Minimum Mean Square Error-Interference Rejection Combining) Receiver, Interference Cancellation (IC, Interference Cancellation) Receiver, Maximum Likelihood (ML) receiver. When the receiver performs cell interference cancellation, the network side needs to provide relevant information of the interference source to the receiver. For example, for the MMSE-IRC receiver, the network side needs to provide the target UE with the demodulation reference signal (DMRS, Demodulation Reference Signal) port information used by the UE, and the initialization parameters of the DMRS (including the scrambling code ID, the virtual cell ID, and the physical Cell ID, etc.) For IC and ML receivers, the network side needs to provide the above-mentioned information required by the MMSE-IRC, and also needs to provide the modulation mode or MCS information of the interference source.

The method for transmitting the information of the interference source to the UE in the existing network is: the base station of the interfering cell sends the control signaling to the base station of the cell where the UE is located through the X2 interface, and the base station of the cell where the UE is located forwards the control signaling to the UE through the air interface. . This method consumes a large amount of X2 interface signaling overhead and air interface signaling overhead, and causes a large delay, which eventually makes advanced receiver technology difficult to apply to the actual system. Especially under the network conditions of Non-ideal backhaul, the transmission delay between nodes is relatively large, and dynamic parameters like DMRS port information, modulation mode or MCS are not suitable for non-ideal. The backhaul case is transmitted in the X2 interface. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method and a device for transmitting and receiving network auxiliary signaling, which can reduce the signaling overhead of the X2 interface.

In order to solve the above technical problem, the following technical solution is adopted: A method for transmitting network assisted signaling, the method comprising:

The first base station sends the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel. The information carried by the downlink control signaling includes: information indicating whether there is a scheduled user, and/or indicating a downlink transmission parameter of the scheduling user. Information.

Optionally, before the step of the first base station transmitting the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel, the method further includes:

The first base station scrambles the cyclic redundancy check CRC of the downlink control signaling by using a public radio network temporary identifier RNTI.

Optionally, the information indicating whether there is a scheduled user is: indicating that the first base station is located

Optionally, the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:

And indicating a downlink transmission mode, a modulation mode, a modulation and coding mode MCS, a precoding information, a joint indication antenna port, a scrambling code ID, and a layer number information corresponding to each subband or physical resource block in a cell system bandwidth of the first base station, Carrier indication information.

Optionally, the information indicating the downlink transmission parameter of the scheduling user includes a downlink transmission mode corresponding to each sub-band or physical resource block in the bandwidth of the cell system where the first base station is located;

The downlink transmission mode is a transmission mode based on a common reference signal CRS or a transmission mode based on a demodulation reference signal DMRS.

Optionally, the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located; The precoding information includes one or more of the following information:

And the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the number of layers used by the scheduling user, and the precoding matrix index, which are used to indicate the information of the precoding matrix index used by the scheduling user. And information about the number of CRS ports, jointly indicating the number of layers used by the scheduling user, the precoding matrix index range, and the number of CRS ports, indicating that the scheduling user sends a single antenna based on one CRS port or based on two/four Information sent by the diversity of CRS ports.

Optionally, the format of the downlink control signaling is downlink control information DCI format format IX or format 2X or format Y or format 3Z, where X represents E or F or G or H, and Y represents 5 or 6 or 7 or 8 , Z means B or C or 0 or £.

The first base station receives the request information sent by the second base station from the requesting network for performing interference cancellation or suppression through the inter-base station or the inter-node interface, or the user terminal of the cell where the second base station is located, through the inter-base station or the inter-node interface, and then passes the base station. Inter- or inter-node interface feeding back network assistance information to the second base station;

The inter-base station or inter-node interface includes: an X2 interface or a fiber interface.

Optionally, the request information includes:

Indicates whether network assisted interference cancellation or suppression is required; indicates whether the cell in which the second base station is located has information that the user terminal is to use an advanced receiver for interference cancellation or suppression; and indicates a physical that needs network-assisted interference cancellation or suppression Information of a resource block or subframe; and/or information indicating a carrier.

Optionally, the network assistance information includes one or more of the following information:

And indicating the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and the configuration set 1 or the configuration set 2 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located The information of the domain resource and/or the frequency domain resource, the public RNTL indicates the information of the subframe requiring network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the information indicating the range of the DMR S antenna port. Optionally, the range information indicating that the C-RNTI of the user scheduled by the first base station is located is two different values of the C-RNTI or the absolute value and the relative value of the C-RNTI.

Optionally, the method further includes:

The first base station or the second base station configures, by the high layer radio resource control RRC signaling, that the user terminal or the scheduling user is in a transmission mode M, M is any one of integers 11-15.

Optionally, the second base station sends subframe configuration information that needs to be interference-cancelled or suppressed to the scheduling user by using high-layer RRC signaling.

A method for receiving network assisted signaling, the method comprising:

The user terminal receives the downlink control signaling from the first base station through the physical downlink control channel or the enhanced physical downlink control channel; the information carried in the downlink control signaling includes: information indicating whether there is a scheduled user, and/or indicating the scheduling user Information about the downstream transmission parameters.

Optionally, the information indicating whether the scheduling user exists is: indicating that the first base station is located. Optionally, the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:

Optionally, the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;

The precoding information includes one or more of the following information:

Information indicating a precoding matrix index used by the scheduling user, jointly indicating the scheduling The number of layers used by the user, the information of the precoding matrix index, the information indicating the number of layers used by the scheduling user, the precoding matrix index, and the number of CRS ports, jointly indicating the number of layers used by the scheduling user, The information of the coding matrix index range and the number of CRS ports indicates that the scheduling user transmits information based on single antenna transmission of one CRS port or based on diversity of two/four CRS ports.

Optionally, before the step of the user terminal receiving the downlink control signaling sent by the first base station by using the physical downlink control channel or the enhanced physical downlink control channel, the method further includes:

The second base station requesting network assistance for interference cancellation or suppression sends request information to the first base station through an inter-base station or inter-node interface;

Receiving network auxiliary information from the first base station through inter-base station or node indirect port feedback through an inter-base station or inter-node interface;

Optionally, the request information includes:

And indicating the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and the configuration set 1 or the configuration set 2 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located The information of the domain resource and/or the frequency domain resource, the public RNTL indicates the information of the subframe requiring network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the information indicating the range of the DMR S antenna port.

Optionally, the range information indicating that the C-RNTI of the user scheduled by the first base station is located is two different values of the C-RNTI or the absolute value and the relative value of the C-RNTI.

Optionally, the method further includes:

Transmitting the network auxiliary information to the user terminal by using the physical control channel or the enhanced physical control channel or the high layer RRC signaling, where the user terminal is configured according to the received network The information is blindly detected by the downlink control signaling sent by the first base station.

An apparatus for transmitting network assisted signaling, including a sending module,

The sending module is configured to send downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel; the information carried by the downlink control signaling includes: information indicating whether there is a scheduled user, and/or indicating scheduling Information about the downlink transmission parameters of the user.

Optionally, the device for sending network auxiliary signaling further includes a scrambling module,

The scrambling module is configured to scramble the cyclic redundancy check CRC of the downlink control signaling by using a public radio network temporary identifier RNTI;

The sending module is specifically configured to send the scrambled downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel.

The precoding information includes one or more of the following information:

Optionally, the apparatus for sending network auxiliary signaling further includes a receiving module, The receiving module is configured to receive, by using an inter-base station or an inter-node interface, request information sent by a second base station from the requesting network for performing interference cancellation or suppression, by using an inter-base station or inter-node interface, or a user terminal of a cell where the second base station is located;

The transmitting module is further configured to feed back network assistance information to the second base station through an inter-base station or inter-node interface.

Optionally, the request information includes:

Optionally, the device for sending network auxiliary signaling further includes a configuration module, where

The configuration module is configured to configure, by the high layer radio resource control RRC signaling, that the user terminal or the scheduling user is in a transmission mode M, where M is an integer of 11 to 15.

An apparatus for receiving network auxiliary signaling, comprising a receiving module,

The receiving module is configured to receive, by the first base station, the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel; the information carried by the downlink control signaling includes: information indicating whether there is a scheduled user, And/or information indicating a downlink transmission parameter of the scheduling user.

Optionally, the information indicating whether the scheduling user exists is: indicating that the first base station is located optionally, the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information: And indicating a downlink transmission mode, a modulation mode, a modulation and coding mode MCS, a precoding information, a joint indication antenna port, a scrambling code ID, and a layer number information corresponding to each subband or physical resource block in a cell system bandwidth of the first base station, Carrier indication information.

The precoding information includes one or more of the following information:

Optionally, the apparatus for receiving network auxiliary signaling further includes: a sending module, where the sending module is configured to send request information to the first base station by using an inter-base station or an inter-node interface;

The receiving module is further configured to receive network auxiliary information from the first base station through inter-base station or inter-node interface feedback through an inter-base station or an inter-node interface;

Optionally, the request information includes:

Optionally, the network assistance information includes one or more of the following information: And indicating the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and the configuration set 1 or the configuration set 2 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located The information of the domain resource and/or the frequency domain resource, the public RNTL indicates the information of the subframe requiring network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the information indicating the range of the DMRS antenna port.

Optionally, the apparatus for receiving network auxiliary signaling further includes a descrambling module, where the descrambling module is configured to perform blind detection on downlink control signaling sent by the first base station according to the received network auxiliary information. .

Compared with the related art, the embodiment of the present invention includes: the first base station sends the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel; the information carried by the downlink control signaling includes at least: indicating whether there is a scheduled user Information, and/or information indicating the downlink transmission parameters of the scheduling user. With the technical solution of the present invention, the first base station directly sends the downlink control signaling to the user terminal, and does not need to be sent by the base station of the cell where the user terminal is located, thereby reducing the signaling overhead of the X2 interface. DRAWINGS

The drawings in the following description of the embodiments of the present invention are intended to provide a further understanding of the invention, and are not intended to limit the scope of the invention. In the figure:

1 is a flowchart of a method for transmitting network assisted signaling according to an embodiment of the present invention;

2 is a flowchart of a method for receiving network assisted signaling according to an embodiment of the present invention;

FIG. 3 is a structural diagram of an apparatus for transmitting network auxiliary signaling according to an embodiment of the present invention; FIG. 4 is a structural composition diagram of an apparatus for receiving network auxiliary signaling according to an embodiment of the present invention. detailed description

In order to facilitate the understanding of those skilled in the art, the embodiments of the present invention are further described below with reference to the accompanying drawings, but this is not intended to limit the scope of the present invention.

Referring to FIG. 1, an embodiment of the present invention provides a method for transmitting network assisted signaling, including: Step 100: The first base station sends downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel. The information carried by the downlink control signaling includes: at least: indicating whether there is information about scheduling users, and/or indicating downlink of the scheduling user. Information about the transmission parameters.

In this step, the format of the downlink control signaling is the downlink control information (DCI, Downlink Control Information) format format IX or DCI format 2X or DCI format Y or DCI format 3Z, where X represents E or F or G or H, and Y represents 5 or 6 or 7 or 8, Z represents B or C or in this step, the information indicating whether there is a scheduled user is: indicating the cell system in which the first base station is located

In this step, the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:

Indicates a downlink transmission mode, a modulation mode, a modulation and coding mode MCS, a precoding information, a joint indication antenna port, a scrambling code ID, a layer number information, and a carrier indication corresponding to each subband or physical resource block in a cell system bandwidth of the first base station. information.

In this step, the information indicating the downlink transmission parameter of the scheduling user includes a downlink transmission mode corresponding to each sub-band or physical resource block in the bandwidth of the cell system where the first base station is located; the downlink transmission mode is a CRS-based transmission mode or a DMRS-based transmission mode. mode.

The modulation mode may be Quadrature Phase Shift Keying (QPSK) modulation, or Quadrature Amplitude Modulation (QAM) modulation, or 64QAM modulation, or 256QAM modulation.

In this step, the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located; the precoding information includes one or more of the following information:

The information indicating the precoding matrix index used by the scheduling user, the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the information indicating the number of layers used by the scheduling user, the precoding matrix index, and the number of CRS ports. And jointly indicating information about the number of layers used by the scheduling user, the precoding matrix index range, and the number of CRS ports, indicating that the scheduling user transmits information based on single antenna transmission of one CRS port or based on diversity of two/four CRS ports. Wherein, the information indicating the joint indication antenna port, the scrambling code ID, and the number of layers may be represented by 3 bits or 4 bits, such as Table 1 or Table 2 or Table 3.

0100 1 code word, 2 layers, DMRS port 7-8

0101 1 code word, 3 layers, DMRS port 7-9

0110 1 code word, 4 layers, DMRS port 7-10

0111 reserved

1000 reserved

1001 2 code words, 2 layers, DMRS port 7-8, 4 special code ID = 1

1010 2 code words, 3 layers, DMRS port 7-9

1011 2 code words, 4 layers, DMRS port 7-10

1100 2 code words, 5 layers, DMRS port 7-11

1101 2 code words, 6 layers, DMRS port 7-12

1110 2 code words, 7 layers, DMRS port 7-13

1111 2 code words, 8 layers, DMRS port 7-14

Table 2

Bit information Meaning

000 1 layer, DMRS port 7 , scrambling code ID = 0

001 1st floor, DMRS port 7, 4 yd ID = 1

010 layer 1, DMRS port 8, scrambling code ID = 0 on 1 layer, DMRS port 8, scrambling code ID = 1

100 2 layers, DMRS port 7-8

101 3 layers, DMRS port 7-9

110 4 layers, DMRS port 7-10

111 Reserved

table 3

Wherein, 4 bits can be used to indicate the single-antenna transmission of the scheduling user based on one CRS port or the diversity transmission based on two/four CRS ports, the number of layers used by the scheduling user, and the CRS port. The number and precoding matrix index range, as shown in Table 4 or Table 5.

Bit information Meaning

0000 interference based on 1 CRS port transmission

0001 interference based on diversity transmission of 2 CRS ports

0010 Interference is based on diversity transmission of 4 CRS ports

0011 1 layer, PMI 0-PMI 3, 2 CRS ports

0100 2 layers, PMI 0-PMI 3, 2 CRS ports

0101 1st floor, PMI 0-PMI 7 , 4 CRS ports

0110 1 layer, PMI 8-PMI1 5 , 4 CRS ports

0111 2 layers, PMI 0-PMI 7 , 4 CRS ports

1000 2 layers, PMI 8-PMI 15 , 4 CRS ports

1001 3 layers, PMI 0-PMI 7 , 4 CRS ports

1010 3 layers, PMI 8-PMI 15 , 4 CRS ports

1011 4 layers, PMI 0-PMI 7 , 4 CRS ports

1100 4 layers, PMI 8-PMI 15 , 4 CRS ports

1101 Reserved

1110 Reserved

1111 Reserved

Table 4

Bit information Meaning

0000 interference based on 1 CRS port transmission

0001 interference based on diversity transmission of 2 CRS ports

0010 Interference is based on diversity transmission of 4 CRS ports

0011 1 layer, PMI 0-PMI 3, 2 CRS ports

0100 2 layers, PMI 0-PMI 3, 2 CRS ports 0101 1st floor, PMI 0-PMI 3, 4 CRS ports

0110 1st floor, PMI 4-PMI 7 , 4 CRS ports

0111 1st floor, PMI 8-PMI 11 , 4 CRS ports

1000 1 layer, PMI 12-PMI 15 , 4 CRS ports

1001 2 layers, PMI 0-PMI 3, 4 CRS ports

1010 2 layers, PMI 4-PMI 7 , 4 CRS ports

1011 2 layers, PMI 8-PMI 11 , 4 CRS ports

1100 2 layers, PMI 12-PMI 15 , 4 CRS ports

1101 3 layers, PMI 0-PMI 7 , 4 CRS ports

1110 3 layers, PMI 8-PMI 15 , 4 CRS ports

1111 4 layers, PMI 0-PMI 15 , 4 CRS ports Table 5

Wherein, 4 bits can be used to indicate the diversity transmission range of the single antenna of the scheduling user based on one CRS port to the two/four CRS ports, as shown in Table 6.

Bit information Meaning

0000 interference based on 1 CRS port for single antenna transmission

0001 Diversity transmission based on two/four CRS ports

0010 PMI 0

0011 PMI 1

0100 PMI 2

0101 PMI 3

0110 PMI 4

0111 PMI 5

1000 PMI 6

1001 PMI 7 1010 PMI8

1011 PMI9

1100 PMI 10

1101 PMI 11

1110 PMI 12

1111 PMI 13 - PMI 15

Table 6

Among them, 4 bits can be used to represent the precoding matrix index range, as shown in Table 7.

Bit information Meaning

0000 PMI0

0001 PMI 1

0010 PMI2

0011 PMI3

0100 PMI4

0101 PMI5

0110 PMI6

0111 PMI7

1000 PMI8

1001 PMI9

1010 PMI 10

1011 PMI 11

1100 PMI 12

1101 PMI 13

1110 PMI 14

1111 PMI 15 Table 7

Among them, 3 bits can be used to represent the precoding matrix index range, as shown in Table 8.

Table 8

Wherein, 4 bits can be used to indicate the number of layers used by the scheduling user, the antenna port, the scrambling code ID, the number of layers used by the scheduling user, and the precoding matrix index range, as shown in Table 9 or Table 10.

1010 PMI 6 ~ PMI 7

1011 PMI 8 ~ PMI 9

1100 PMI 10 - PMI 11

1101 PMI 12 - PMI 13

1110 PMI 14 - PMI 15

1111 Reserved

Table 9

Bit information Meaning

0000 layer 1, DMRS port 7, scrambling code ID = 0

0001 1st floor, DMRS port 7, 4 yards ID = 1

0010 layer 1, DMRS port 8, scrambling code ID = 0

0011 Layer 1, DMRS port 8, scrambling code ID = 1

0100 2 layers, DMRS port 7-8

0101 Layer 3, DMRS port 7-9

0110 4 layers, DMRS port 7-10

0111 Single antenna transmission based on 1 CRS port

1000 based on two/four CRS ports for diversity transmission

1001 PMI 0 ~ PMI 1

1010 PMI 2 ~ PMI 3

1011 PMI 4 ~ PMI 5

1100 PMI 6 ~ PMI 7

1101 PMI 8 ~ PMI 9

1110 PMI 10 - PMI 11

1111 PMI 12 - PMI 15

Table 10 In the method for transmitting network auxiliary signaling in the embodiment of the present invention, the method further includes: Step 101: The first base station uses a public wireless network temporary identifier to perform scrambling on a cyclic redundancy check CRC of the downlink control signaling.

In the method for transmitting network assisted signaling in the embodiment of the present invention, the method further includes: Step 102: The first base station receives, by the inter-base station or the inter-node interface, the second base station that assists the network to assist in performing interference cancellation or suppression, or After the inter-node interface, or the request information sent by the user terminal of the cell where the second base station is located, the network auxiliary information is fed back to the second base station through the inter-base station or the inter-node interface. The inter-base station or inter-node interface includes: an X2 interface or a fiber interface.

In this step, the request information includes:

Indicates whether network assisted interference cancellation or suppression is required; indicates whether the cell in which the second base station is located has information that the user terminal is to use an advanced receiver for interference cancellation or suppression; and indicates a physical resource block that needs network-assisted interference cancellation or suppression Or information of a subframe; and/or information indicating a carrier.

In this step, the network auxiliary information includes one or more of the following information:

And indicating the range information of the C-RNTI of the user scheduled by the first base station, the configuration set 1 of the ePDCCH indicating the cell where the first base station is located, or the time domain resource and/or the frequency domain resource of the configuration set 2, the public RNTI, Information indicating a subframe in which network-assisted interference cancellation or suppression is required, information indicating a precoding matrix index range, and information indicating a DMRS antenna port range.

The range information indicating the C-RNTI of the user scheduled by the first base station is two different values of the C-RNTI or the absolute value and the relative value of the C-RNTI.

In the method for transmitting network assisted signaling in the embodiment of the present invention, the method further includes:

Step 103: The first base station or the second base station configures, by using high layer radio resource control (RRC) signaling, that the user terminal is in the transmission mode M, and M is any one of 11 to 15 integers (including 11 and 15).

In this step, when the user terminal is in the transmission mode M, the downlink control signaling may be sent to the user terminal by using the newly defined DCI formatlX or DCI format 2X or DCI format Y or DCI format 3Z format.

In the method for transmitting network assisted signaling in the embodiment of the present invention, the method further includes: The second base station sends subframe configuration information that needs interference cancellation or suppression to the scheduling user by using the high layer RRC signaling.

Referring to FIG. 2, an embodiment of the present invention further provides a method for receiving network auxiliary signaling, including: Step 200: A user terminal receives a downlink control signaling from a first base station by using a physical downlink control channel or an enhanced physical downlink control channel. The information carried by the downlink control signaling includes at least: information indicating whether there is a scheduling user, and/or information indicating a downlink transmission parameter of the scheduling user.

In this step, the information indicating whether there is a scheduled user is: indicating the cell system in which the first base station is located

In this step, the information indicating the downlink transmission parameter of the scheduling user includes a downlink transmission mode corresponding to each sub-band or physical resource block in the bandwidth of the cell system in which the first base station is located;

In this step, the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;

The precoding information includes one or more of the following information:

The information indicating the precoding matrix index used by the scheduling user, the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the information indicating the number of layers used by the scheduling user, the precoding matrix index, and the number of CRS ports. And jointly indicating information about the number of layers used by the scheduling user, the precoding matrix index range, and the number of CRS ports, indicating that the scheduling user transmits information based on single antenna transmission of one CRS port or based on diversity of two/four CRS ports.

In the method for receiving the network auxiliary signaling according to the embodiment of the present invention, the method further includes: Step 201: The second base station requesting the network to assist the interference cancellation or suppression sends the request information to the first base station by using an inter-base station or an inter-node interface. . In this step, the inter-base station or inter-node interface includes: an X2 interface or a fiber interface. In this step, the request information includes:

Step 202: Receive network auxiliary information fed back from the first base station through an inter-base station or an inter-node interface by using an inter-base station or an inter-node interface.

In this step, the inter-base station or inter-node interface includes: an X2 interface or a fiber interface.

In this step, network auxiliary signaling may be sent through high layer RRC signaling.

And indicating the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and the configuration set 1 or the configuration set 2 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located The information of the domain resource and/or the frequency domain resource, the public RNTL indicates the information of the subframe requiring network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the information indicating the range of the DMRS antenna port.

In the method for receiving network assisted signaling in the embodiment of the present invention, the method further includes: Step 203: The second base station passes the physical control channel or the enhanced physical control channel or the upper layer

The RRC signaling sends the network auxiliary information to the user terminal, and the user terminal performs blind detection on the downlink control signaling sent by the first base station according to the received network auxiliary information.

Referring to FIG. 3, an embodiment of the present invention further provides an apparatus for sending network auxiliary signaling, which at least includes:

a sending module, configured to send downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel; the information carried by the downlink control signaling includes at least: information indicating whether there is a scheduled user, and/or indicating a scheduling user Information about the downstream transmission parameters. The device for sending network auxiliary signaling in the embodiment of the present invention further includes:

a scrambling module configured to scramble the cyclic redundancy check CRC of the downlink control signaling using a public wireless network temporary identifier RNTI;

And a sending module, configured to: send the scrambled downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel.

The device for transmitting the network auxiliary signaling in the embodiment of the present invention indicates whether the information of the scheduling user is: indicating whether there is information about the scheduling user on each sub-band or each physical resource block in the bandwidth of the cell system in which the first base station is located.

The apparatus for transmitting network auxiliary signaling in the embodiment of the present invention, the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:

The apparatus for transmitting the network auxiliary signaling in the embodiment of the present invention, the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;

The precoding information includes one or more of the following information:

The device for sending network auxiliary signaling in the embodiment of the present invention further includes:

a receiving module, configured to receive, by the inter-base station or the inter-node interface, request information sent by the second base station from the requesting network for interference cancellation or suppression, or between the inter-base station or inter-node interface, or the user terminal of the cell in which the second base station is located;

a sending module, which is also configured to:

The network auxiliary information is fed back to the second base station through an inter-base station or inter-node interface. The apparatus for transmitting network auxiliary signaling according to the embodiment of the present invention, the request information includes: information indicating whether network assisted interference cancellation or suppression is required; indicating whether a cell of the second base station has a user terminal to use an advanced receiver for interference cancellation or suppression Information; information indicating physical resource blocks or subframes that require network-assisted interference cancellation or suppression; and/or information indicating the carrier.

The apparatus for transmitting network assisted signaling in the embodiment of the present invention, the network auxiliary information includes one or more of the following information:

Indicates the range information of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, the configuration set 1 of the enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located, or the time domain resource of the configuration set 2 Or information of a frequency domain resource, a public RNTI, information indicating a subframe that needs network-assisted interference cancellation or suppression, information indicating a range of a precoding matrix index, and information indicating a range of a DMRS antenna port.

And a configuration module configured to configure the user terminal or the scheduled user to be in the transmission mode Μ, Μ to any one of 11 to 15 integers (including 11 and 15) by the high layer radio resource control RRC signaling.

The embodiment of the present invention further provides an apparatus for receiving network auxiliary signaling, which at least includes: a receiving module, configured to receive, by the first base station, downlink control signaling by using a physical downlink control channel or an enhanced physical downlink control channel; The information carried in the downlink control signaling includes at least: information indicating whether there is a scheduling user, and/or information indicating a downlink transmission parameter of the scheduling user.

The apparatus for receiving the network auxiliary signaling in the embodiment of the present invention indicates whether the information of the scheduling user is: indicating whether there is information about the scheduling user on each sub-band or each physical resource block in the bandwidth of the cell system in which the first base station is located.

The apparatus for receiving network auxiliary signaling in the embodiment of the present invention, the information indicating the downlink transmission parameter of the scheduling user includes one or more of the following information:

Indicates a downlink transmission mode, a modulation mode, a modulation and coding mode MCS, a precoding information, a joint indication antenna port, a scrambling code ID, a layer number information, and a carrier indication corresponding to each subband or physical resource block in a cell system bandwidth of the first base station. information. The apparatus for receiving the network auxiliary signaling in the embodiment of the present invention, the information indicating the downlink transmission parameter of the scheduling user includes a downlink transmission mode corresponding to each sub-band or physical resource block in the bandwidth of the cell system in which the first base station is located;

The apparatus for receiving the network auxiliary signaling in the embodiment of the present invention, the information indicating the downlink transmission parameter of the scheduling user includes precoding information corresponding to each subband or physical resource block in the bandwidth of the cell system where the first base station is located;

The precoding information includes one or more of the following information:

The information indicating the precoding matrix index used by the scheduling user, the information indicating the number of layers used by the scheduling user, the information of the precoding matrix index, the information indicating the number of layers used by the scheduling user, the precoding matrix index, and the number of CRS ports. And jointly indicating the number of layers used by the scheduling user, the precoding matrix index range, and the number of CRS ports, indicating that the scheduling user transmits based on a single antenna of one CRS port or based on diversity of two/four CRS ports. .

The apparatus for receiving network auxiliary signaling in the embodiment of the present invention further includes:

a sending module, configured to send request information to the first base station by using an inter-base station or inter-node interface; the receiving module is further configured to receive, by using an inter-base station or an inter-node interface, network auxiliary information that is fed back from the first base station through the inter-base station or inter-node interface;

Inter-base station or inter-node interfaces include: X2 interface or fiber interface.

The apparatus for receiving network auxiliary signaling in the embodiment of the present invention, the request information includes:

The apparatus for receiving network assisted signaling in the embodiment of the present invention, the network auxiliary information includes one or more of the following information:

a range information indicating a cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and a configuration set indicating an enhanced physical downlink control channel ePDCCH of the cell where the first base station is located Combining 1 or configuring the information of the time domain resource and/or the frequency domain resource of the set 2, the public RNTI, the information indicating the subframe to be subjected to network-assisted interference cancellation or suppression, the information indicating the range of the precoding matrix index, and the indication DMRS Information on the antenna port range.

And a descrambling module, configured to perform blind detection on the downlink control signaling sent by the first base station according to the received network auxiliary information.

In the embodiment of the present invention, the downlink control signaling is directly sent to the user terminal by the first base station, and is not required to be sent by the base station of the cell where the user terminal is located, thereby reducing the signaling overhead of the X2 interface.

It should be noted that the above-mentioned embodiments are only for the purpose of facilitating the understanding of those skilled in the art, and are not intended to limit the scope of the present invention, and those skilled in the art will Any obvious substitutions and improvements made by the invention are within the scope of the invention.

Industrial applicability

The embodiment of the present invention includes: the first base station sends the downlink control signaling by using the physical downlink control channel or the enhanced physical downlink control channel; the information carried by the downlink control signaling includes at least: information indicating whether there is a scheduled user, and/or Information indicating the downlink transmission parameters of the scheduling user. With the technical solution of the present invention, the first base station directly sends the downlink control signaling to the user terminal, and does not need to be sent by the base station of the cell where the user terminal is located, thereby reducing the signaling overhead of the X2 interface, so the present invention has a strong Industrial applicability.

Claims

claims

1. A method for sending network auxiliary signaling. The method includes:

The first base station sends downlink control signaling through the physical downlink control channel or the enhanced physical downlink control channel; the information carried by the downlink control signaling includes: information indicating whether there is a scheduled user, and/or downlink transmission parameters indicating whether the scheduled user exists. Information.

2. The method for sending network-assisted signaling according to claim 1, wherein before the first base station sends the downlink control signaling through the physical downlink control channel or the enhanced physical downlink control channel, the method further includes:

The first base station uses the public wireless network temporary identifier RNTI to scramble the cyclic redundancy check CRC of the downlink control signaling.

3. The method for sending network-assisted signaling according to claim 1 or 2, wherein the information indicating whether there is a scheduled user is: indicating each user within the system bandwidth of the cell where the first base station is located.

4. The method for sending network-assisted signaling according to claim 1 or 2, wherein the information indicating the downlink transmission parameters of the scheduled user includes one or more of the following information:

Information indicating the downlink transmission mode, modulation method, modulation coding method MCS, precoding information, joint indication antenna port, scrambling code ID, and number of layers corresponding to each subband or physical resource block within the cell system bandwidth where the first base station is located, Carrier indication information.

5. The method for sending network-assisted signaling according to claim 1 or 2, wherein the information indicating the downlink transmission parameters of the scheduled user includes indicating each subband or physical resource within the system bandwidth of the cell where the first base station is located. The downstream transmission mode corresponding to the block;

The downlink transmission mode is a transmission mode based on the common reference signal CRS or a transmission mode based on the demodulation reference signal DMRS.

6. The method for sending network-assisted signaling according to claim 1 or 2, wherein the information indicating the downlink transmission parameters of the scheduled user includes indicating each subband or physical resource within the system bandwidth of the cell where the first base station is located. Precoding information corresponding to the block;

The precoding information includes one or more of the following information: Information indicating the precoding matrix index used by the scheduled user, information that jointly indicates the number of layers and precoding matrix index used by the scheduled user, jointly indicating the number of layers and precoding matrix index used by the scheduled user , information on the number of CRS ports, jointly indicating the number of layers used by the scheduled user, the precoding matrix index range, and the information on the number of CRS ports, indicating that the scheduled user is based on single antenna transmission of one CRS port or based on two/four Information sent by diversity of CRS ports.

7. The method for sending network-assisted signaling according to claim 1 or 2, wherein the format of the downlink control signaling is the downlink control information DCI format format IX or format 2X or format Y or format 3Z, where X represents E or F or G or H, Y means 5 or 6 or 7 or 8, Z means B or C or 0 or £.

8. The method for sending network-assisted signaling according to claim 1 or 2, wherein before the step of sending the downlink control signaling by the first base station through the physical downlink control channel or the enhanced physical downlink control channel, the method further includes :

After the first base station receives the request information sent by the second base station through the inter-base station or inter-node interface through the inter-base station or inter-node interface, which requests network assistance for interference cancellation or suppression, or the user terminal in the cell where the second base station is located, the first base station passes the base station The inter-node interface feeds back network assistance information to the second base station;

Wherein, the interfaces between base stations or nodes include: X2 interface or optical fiber interface.

9. The method for sending network-assisted signaling according to claim 8, wherein the request information includes:

Information indicating whether network assistance is required for interference cancellation or suppression; Information indicating whether a user terminal in the cell where the second base station is located needs to use an advanced receiver for interference cancellation or suppression; Information indicating the need for network-assisted interference cancellation or suppression. Information on resource blocks or subframes; and/or information indicating carriers.

10. The method for sending network assistance signaling according to claim 8, wherein the network assistance information includes one or more of the following information:

Range information indicating the location of the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station, and enhanced physical downlink control channel ePDCCH indicating the cell where the first base station is located. Information about time domain resources and/or frequency domain resources of configuration set 1 or configuration set 2, public RNTL information indicating subframes that require network-assisted interference cancellation or suppression, information indicating the precoding matrix index range, indication DMR S antenna port range information.

11. The method for sending network-assisted signaling according to claim 10, wherein the range information indicating the C-RNTI of the user scheduled by the first base station is two different values of C-RNTI or the C -Absolute and relative values of RNTI.

12. The method for sending network-assisted signaling according to claim 8, further comprising: the first base station or the second base station configuring the user terminal or the scheduling through high-layer radio resource control RRC signaling. The user is in transmission mode M, and M is any integer from 11 to 15.

13. The method for sending network-assisted signaling according to claim 8, wherein the second base station sends the subframe configuration information that requires interference cancellation or suppression to the scheduled user through high-layer RRC signaling.

14. A method for receiving network auxiliary signaling, the method includes:

The user terminal receives downlink control signaling sent from the first base station through the physical downlink control channel or the enhanced physical downlink control channel; the information carried by the downlink control signaling includes: information indicating whether there is a scheduled user, and/or indicating a scheduled user Information about the downlink transmission parameters.

15. The method for receiving network-assisted signaling according to claim 14, wherein the information indicating whether there is a scheduled user is: indicating each subband or each physical resource block within the cell system bandwidth where the first base station is located. Whether there is scheduling user information.

16. The method for receiving network-assisted signaling according to claim 14, wherein the information indicating the downlink transmission parameters of the scheduled user includes one or more of the following information:

17. The method for receiving network-assisted signaling according to claim 14, wherein the information indicating the downlink transmission parameters of the scheduled user includes indicating the corresponding subbands or physical resource blocks within the system bandwidth of the cell where the first base station is located. Downlink transmission mode; The downlink transmission mode is a transmission mode based on a common reference signal CRS or a transmission mode based on a demodulation reference signal DMRS.

18. The method for receiving network-assisted signaling according to claim 14, wherein the information indicating the downlink transmission parameters of the scheduled user includes indicating the corresponding subbands or physical resource blocks within the system bandwidth of the cell where the first base station is located. precoding information;

The precoding information includes one or more of the following information:

Information indicating the precoding matrix index used by the scheduled user, information that jointly indicates the number of layers and precoding matrix index used by the scheduled user, jointly indicating the number of layers and precoding matrix index used by the scheduled user , information on the number of CRS ports, jointly indicating the number of layers used by the scheduled user, the precoding matrix index range, and the information on the number of CRS ports, indicating that the scheduled user is based on single antenna transmission of one CRS port or based on two/four Information sent by diversity of CRS ports.

19. The method for receiving network-assisted signaling according to claim 14, wherein before the user terminal receives the step of sending downlink control signaling from the first base station through the physical downlink control channel or the enhanced physical downlink control channel, the method further include:

The second base station that requests network assistance for interference cancellation or suppression sends request information to the first base station through the inter-base station or inter-node interface;

Receive network assistance information fed back from the first base station through an inter-base station or inter-node interface;

20. The method for receiving network-assisted signaling according to claim 19, wherein the request information includes:

21. The method of receiving network assistance signaling according to claim 19, wherein the network assistance information includes one or more of the following information: When indicating the range information where the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station is located, and indicating the configuration set 1 or configuration set 2 of the enhanced physical downlink control channel ePDCCH of the cell where the first base station is located Domain resource and/or frequency domain resource information, public RNTL information indicating subframes that require network-assisted interference cancellation or suppression, information indicating the precoding matrix index range, and information indicating the DMRS antenna port range.

22. The method for receiving network-assisted signaling according to claim 21, wherein the range information indicating the C-RNTI of the user scheduled by the first base station is two different values of C-RNTI or the C -Absolute and relative values of RNTI.

23. The method for receiving network assistance signaling according to claim 14, the method further comprising: the second base station sends the network assistance information to the second base station through a physical control channel or an enhanced physical control channel or high-level RRC signaling. User terminal, the user terminal performs blind detection on the downlink control signaling sent by the first base station according to the received network assistance information.

24. A device for sending network-assisted signaling, including a sending module,

Wherein, the sending module is configured to send downlink control signaling through a physical downlink control channel or an enhanced physical downlink control channel; the information carried by the downlink control signaling includes: information indicating whether there is a scheduled user, and/or indicating scheduling Information about the user’s downlink transmission parameters.

25. The device for sending network-assisted signaling according to claim 24, further comprising a scrambling module, wherein the scrambling module is configured to use a public wireless network temporary identifier RNTI to perform cyclic redundancy of the downlink control signaling. The residual check CRC is scrambled;

The sending module is specifically configured to send scrambled downlink control signaling through a physical downlink control channel or an enhanced physical downlink control channel.

26. The device for sending network-assisted signaling according to claim 24, wherein the information indicating whether there is a scheduled user is: indicating each subband or each physical resource block within the cell system bandwidth where the first base station is located. Whether there is scheduling user information.

27. The device for sending network-assisted signaling according to claim 24, wherein the information indicating the downlink transmission parameters of the scheduled user includes one or more of the following information:

Indicate the downlink transmission mode, modulation mode, modulation and coding mode MCS, precoding information, and joint indication antenna terminal corresponding to each subband or physical resource block within the system bandwidth of the cell where the first base station is located. port, scrambling code ID, layer number information, carrier indication information.

28. The device for sending network-assisted signaling according to claim 24, wherein the information indicating the downlink transmission parameters of the scheduled user includes indicating the corresponding subbands or physical resource blocks within the system bandwidth of the cell where the first base station is located. precoding information;

The precoding information includes one or more of the following information:

29. The device for sending network-assisted signaling according to claim 24, further comprising a receiving module, wherein the receiving module is configured to receive a second request for network assistance for interference cancellation or suppression through an inter-base station or inter-node interface. Request information sent by the base station through the inter-base station or inter-node interface, or the user terminal in the cell where the second base station is located;

The sending module is further configured to feed back network assistance information to the second base station through an inter-base station or inter-node interface.

30. The device for sending network-assisted signaling according to claim 29, wherein the request information includes:

31. The device for sending network assistance signaling according to claim 29, wherein the network assistance information includes one or more of the following information:

When indicating the range information where the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station is located, and indicating the configuration set 1 or configuration set 2 of the enhanced physical downlink control channel ePDCCH of the cell where the first base station is located domain resources and/or frequency domain resource information, public RNTL indicates the information of subframes requiring network-assisted interference cancellation or suppression, information indicating the precoding matrix index range, and information indicating the DMR S antenna port range.

32. The device for sending network-assisted signaling according to claim 24 or 29, further comprising a configuration module,

Wherein, the configuration module is configured to configure the user terminal or the scheduled user to be in transmission mode M through high-layer radio resource control RRC signaling, where M is any one of an integer from 11 to 15.

33. A device for receiving network auxiliary signaling, including a receiving module,

Wherein, the receiving module is configured to receive downlink control signaling sent from the first base station through a physical downlink control channel or an enhanced physical downlink control channel; the information carried by the downlink control signaling includes: information indicating whether there is a scheduled user, and/or information indicating the downlink transmission parameters of the scheduled user.

34. The device for receiving network-assisted signaling according to claim 33, wherein the information indicating whether there is a scheduled user is: indicating each subband or each physical resource block within the cell system bandwidth where the first base station is located. Whether there is scheduling user information.

35. The device for receiving network-assisted signaling according to claim 34, wherein the information indicating the downlink transmission parameters of the scheduled user includes one or more of the following information:

36. The device for receiving network-assisted signaling according to claim 34, wherein the information indicating the downlink transmission parameters of the scheduled user includes indicating the corresponding subbands or physical resource blocks within the system bandwidth of the cell where the first base station is located. Downlink transmission mode;

37. The device for receiving network-assisted signaling according to claim 34, wherein the information indicating the downlink transmission parameters of the scheduled user includes indicating the corresponding subbands or physical resource blocks within the system bandwidth of the cell where the first base station is located. precoding information;

38. The device for receiving network-assisted signaling according to claim 33, further comprising a sending module, wherein,

The sending module is configured to send request information to the first base station through an inter-base station or inter-node interface;

The receiving module is further configured to receive network assistance information fed back from the first base station through an inter-base station or inter-node interface;

39. The device for receiving network-assisted signaling according to claim 38, wherein the request information includes:

40. The device for receiving network assistance signaling according to claim 38, wherein the network assistance information includes one or more of the following information:

When indicating the range information where the cell radio network temporary identifier C-RNTI of the user scheduled by the first base station is located, and indicating the configuration set 1 or configuration set 2 of the enhanced physical downlink control channel ePDCCH of the cell where the first base station is located Domain resource and/or frequency domain resource information, public RNTL information indicating subframes that require network-assisted interference cancellation or suppression, information indicating the precoding matrix index range, and information indicating the DMR S antenna port range.

41. The device for receiving network assistance signaling according to claim 33, further comprising a descrambling module, wherein the descrambling module is configured to perform downlink control signaling sent by the first base station according to the received network assistance information. Make a blind test.