CN115150035B - Information transmission method and system and base station - Google Patents
Information transmission method and system and base station Download PDFInfo
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- CN115150035B CN115150035B CN202110331613.3A CN202110331613A CN115150035B CN 115150035 B CN115150035 B CN 115150035B CN 202110331613 A CN202110331613 A CN 202110331613A CN 115150035 B CN115150035 B CN 115150035B
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000013468 resource allocation Methods 0.000 claims abstract description 28
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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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- 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
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- 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 disclosure provides an information transmission method and system and a base station, and relates to the field of wireless communication. The method comprises the steps that a first base station obtains resource allocation information of reference signals of all cells of a second base station; determining that the first cell and the second cell are the pairing relationship of the dynamic spectrum sharing cell according to the transmission association relationship of the first cell of the first base station and the second cell of the second base station; the PDSCH data of the first cell is mapped to the time-frequency resource of the reference signal allocated to the second cell; and adding the interference indication information of whether the time-frequency resources are multiplexed to the resource configuration information of the PDSCH data of the first cell and transmitting the information to the terminal of the first cell, so that the terminal demodulates the multiplexed time-frequency resources by using a serial interference elimination technology based on the indication of the interference indication information. The frequency spectrum efficiency is improved through multiplexing, and interference indication information whether time-frequency resources are multiplexed or not is sent to the terminal, so that the terminal can perform accurate interference elimination according to the indication.
Description
Technical Field
The present disclosure relates to the field of wireless communications, and in particular, to an information transmission method and system, and a base station.
Background
The 5G (5 th, 5th generation) wireless communication technology is a main technology of the next generation wireless network, and has the technical characteristics of supporting ultra wideband, large connection and the like. The frequency point of the current 4G (4 th, 4 th generation) wireless communication technology is generally lower than the 5G commercial frequency point, and the 4G spectrum utilization rate is still insufficient, so that an operator and a device manufacturer propose a dynamic spectrum sharing technology. Based on this technique, the 5G user can receive and transmit the 5G physical layer signal on the original 4G spectrum, and in order to improve spectrum utilization efficiency, the 4G user and the 5G user can share the same spectrum. However, the 4G user and the 5G user share the same spectrum, resulting in a large interference ratio between the 4G user and the 5G user.
Disclosure of Invention
According to the embodiment of the disclosure, PDSCH data of the first cell of the first base station is mapped onto time-frequency resources of the reference signal of the second cell of the second base station in a multiplexing mode, so that the spectrum efficiency is improved, and the first base station sends interference indication information whether the time-frequency resources are multiplexed or not to a terminal of the first cell, so that the terminal can perform accurate interference elimination according to the indication.
Some embodiments of the present disclosure provide an information transmission method, including:
The method comprises the steps that a first base station obtains resource allocation information of reference signals of all cells of a second base station;
The first base station determines that the first cell and the second cell are the pairing relationship of the dynamic spectrum sharing cell according to the transmission association relationship of the first cell of the first base station and the second cell of the second base station;
the first base station re-maps the physical downlink shared channel PDSCH data of the first cell to the time-frequency resource of the reference signal allocated to the second cell;
The first base station adds interference indication information whether the time-frequency resources are multiplexed to resource allocation information of PDSCH data of the first cell and sends the information to a terminal of the first cell, so that the terminal demodulates the multiplexed time-frequency resources by using a serial interference elimination technology based on the indication of the interference indication information.
In some embodiments, the reference signal of the second cell is mapped onto the corresponding time-frequency resource by the second base station, and the PDSCH data of the first cell is remapped onto the time-frequency resource allocated to the reference signal of the second cell by the first base station, wherein the transmission power of the PDSCH data of the first cell is different from the transmission power of the reference signal of the second cell.
In some embodiments, the first base station transmitting resource configuration information of PDSCH data of the first cell to the terminal of the first cell includes:
The first base station sends resource allocation information of PDSCH data of a first cell added with the interference indication information to an idle state terminal in the first cell through a broadcast message; or alternatively, the first and second heat exchangers may be,
And the first base station sends the resource configuration information of the PDSCH data of the first cell added with the interference indication information to the terminal in the connection state in the first cell through RRC signaling.
In some embodiments, the resource configuration information of PDSCH data of the first cell transmitted by the first base station to the terminal includes interference indication information whether time-frequency resources are multiplexed, and includes one or more of:
The identity of the first cell is determined,
Downlink frequency point information of PDSCH data of the first cell,
The periodic configuration of PDSCH data of the first cell includes: time domain occupancy information for indicating a time domain symbol occupied by PDSCH data of the first cell and frequency domain occupancy information for indicating a frequency domain subcarrier occupied by PDSCH data of the first cell,
Transmission power of PDSCH data of the first cell.
In some embodiments, further comprising: the first base station receives resource allocation information of a reference signal of a second cell sent by the second base station, wherein the resource allocation information comprises interference indication information whether time-frequency resources are multiplexed or not, and comprises one or more of the following:
the identity of the second cell is determined,
The reference signal of the second cell occupies the carrier frequency,
The reference signal of the second cell occupies the carrier bandwidth,
The reference signal of the second cell occupies the antenna port,
A periodic configuration of reference signals of a second cell, comprising: time domain occupancy information for indicating a time domain symbol occupied by a reference signal of the second cell and frequency domain occupancy information for indicating a frequency domain subcarrier occupied by the reference signal of the second cell,
The transmit power of the reference signal of the second cell.
In some embodiments, the first base station obtains resource allocation information of reference signals of all cells of the second base station through an interface between the first base station and the second base station, wherein the first base station and the second base station adopt different air interface systems.
In some embodiments, the resource configuration information of the reference signals of all cells of the second base station acquired by the first base station includes:
The identity of the cell(s),
The downlink frequency point information of the cell,
A periodic configuration of reference signals, comprising: time domain occupancy information for indicating time domain symbols occupied by the reference signal and frequency domain occupancy information for indicating frequency domain subcarriers occupied by the reference signal,
Transmit power information of the reference signal.
In some embodiments, the first base station determines, according to the preconfiguration information configured by the network management, that a transmission association relationship exists between a first cell of the first base station and a second cell of the second base station, where the existence of the transmission association relationship indicates that the first cell and the second cell perform data transceiving operation through the same remote radio unit RRU and the same antenna at the same time and same frequency.
In some embodiments, demodulating the multiplexed time-frequency resources by the terminal using a serial interference cancellation technique based on the indication of the interference indication information comprises:
When the terminal determines that the time-frequency resources are multiplexed based on the indication of the interference indication information, firstly, a signal with the maximum intensity is detected from the received original signals through a pre-equalization detection algorithm, demodulation and reconstruction are carried out, then whether the reconstructed signal is the required PDSCH data of the first cell is judged, if yes, the detection is stopped, if no, the reconstructed signal serving as the interference is subtracted from the original signals, the next detection is started, and the cycle is carried out until the required PDSCH data of the first cell is detected.
In some embodiments, the pre-equalization detection algorithm includes a zero-breaking algorithm or a minimum mean square error algorithm.
Some embodiments of the present disclosure provide a base station, including: a memory; and a processor coupled to the memory, the processor configured to perform an information transmission method based on instructions stored in the memory.
Some embodiments of the present disclosure provide a base station, including:
the receiving module is configured to acquire resource configuration information of reference signals of all cells of the second base station;
The determining module is configured to determine that the first cell and the second cell are the pairing relationship of the dynamic spectrum sharing cell according to the transmission association relationship of the first cell of the first base station and the second cell of the second base station;
A complex mapping module configured to complex-map physical downlink shared channel PDSCH data of the first cell onto time-frequency resources allocated to the reference signal of the second cell;
And the sending module is configured to add the interference indication information of whether the time-frequency resources are multiplexed to the resource configuration information of the PDSCH data of the first cell and send the information to the terminal of the first cell, so that the terminal demodulates the multiplexed time-frequency resources by using a serial interference elimination technology based on the indication of the interference indication information.
Some embodiments of the present disclosure provide an information transmission system, including: the base station comprises a first base station, a second base station and a terminal, wherein:
the first base station is the aforementioned base station,
The second base station is configured to send the resource allocation information of the reference signals of all cells of the second base station to the first base station, and to send the resource allocation information of the reference signals of the second cell of the second base station having a transmission association relation with the first cell of the first base station to the first base station after adding interference indication information whether the time-frequency resources are multiplexed,
The terminal is configured to demodulate the multiplexed time-frequency resources using a serial interference cancellation technique based on an indication of interference indication information whether the time-frequency resources transmitted by the first base station are multiplexed.
Some embodiments of the present disclosure propose a non-transitory computer readable storage medium, on which a computer program is stored, which program when being executed by a processor implements the steps of the information transmission method of any one of claims 1 to 10.
Drawings
The drawings that are required for use in the description of the embodiments or the related art will be briefly described below. The present disclosure will be more clearly understood from the following detailed description with reference to the accompanying drawings.
It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without inventive faculty.
Fig. 1 illustrates a flow diagram of an information transmission method according to some embodiments of the present disclosure.
Fig. 2 shows a flow chart of an information transmission method according to other embodiments of the present disclosure.
Fig. 3a and 3b illustrate diagrams of co-channel interference and time-frequency resource multiplexing according to some embodiments of the present disclosure.
Fig. 4 illustrates a schematic diagram of an information transfer system of some embodiments of the present disclosure.
Fig. 5 illustrates a schematic diagram of a first base station of some embodiments of the present disclosure.
Fig. 6 shows a schematic diagram of a first base station of other embodiments of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure.
Unless specifically stated otherwise, the descriptions of "first," "second," and the like in this disclosure are used for distinguishing between different objects and are not used for indicating a meaning of size or timing, etc.
Fig. 1 illustrates a flow diagram of an information transmission method according to some embodiments of the present disclosure.
As shown in fig. 1, the information transmission method of this embodiment includes: steps 110-160.
Step 110: the first base station acquires resource allocation information of reference signals of all cells of the second base station.
The first base station acquires resource allocation information of reference signals of all cells in the second base station through interfaces between the first base station and the second base station. The first base station and the second base station adopt different air interface modes.
The resource configuration information of the reference signal of each cell of the second base station includes, but is not limited to, the following information:
Cell identity, such as cell PCI (PHYSICAL CELL IDENTIFIER, physical cell identity) obtained through PSS (Primary Synchronization Signal ) and SSS (Secondary Synchronization Signal, secondary synchronization signal);
downlink frequency point information of a cell;
the periodic configuration of the reference signal includes, for example: time domain occupancy information: indicating the number of time domain symbols occupied by the reference signal, and frequency domain occupation information: indicating frequency domain subcarriers occupied by reference signals;
transmit power information of reference signal: indicating the transmit power allocated to the reference signal.
Step 120: and the first base station determines that the first cell and the second cell are the pairing relationship of the dynamic spectrum sharing cell according to the transmission association relationship of the first cell of the first base station and the second cell of the second base station.
The first base station determines that a transmission association relationship exists between a first cell of the first base station and a second cell of the second base station according to the pre-configuration information, wherein the existence of the transmission association relationship indicates that the first cell and the second cell perform data receiving and transmitting operations through the same radio remote unit (Remote Radio Unit, RRU) and an antenna at the same time and same frequency. The pre-configuration information can be configured by a network manager.
Step 130: the second base station obtains the pairing relation of the dynamic spectrum sharing cell existing between the first cell and the second cell through a direct interface between the second base station and the first base station, maps the reference signal of the second cell with the pairing relation to corresponding time-frequency resources, and sends the resource configuration information of the reference signal of the second cell to the first base station.
The resource allocation information of the reference signal of the second cell includes interference indication information whether the time-frequency resources are multiplexed, for example, 1 indicates that the time-frequency resources are multiplexed and 0 indicates that the time-frequency resources are not multiplexed. The resource configuration information of the reference signal of the second cell further comprises one or more of:
identification of the second cell: such as cell PCI acquired through PSS and SSS,
Downlink carrier frequency: the reference signal of the second cell occupies the carrier frequency,
Downlink carrier bandwidth: the reference signal of the second cell occupies a carrier bandwidth, in PRB (physical resource block ) units,
Number of antenna ports: the reference signal of the second cell occupies the antenna port,
A periodic configuration of reference signals of a second cell, comprising: time domain occupancy information for indicating a time domain symbol occupied by a reference signal of the second cell and frequency domain occupancy information for indicating a frequency domain subcarrier occupied by the reference signal of the second cell,
The transmit power of the reference signal of the second cell.
Step 140: the first base station receives resource allocation information of a reference signal of a second cell sent by the second base station, and when the interference indication information indicates time-frequency resource multiplexing, the first base station maps PDSCH (Physical Downlink SHARE CHANNEL, physical downlink shared channel) data of the first cell associated with the second cell to time-frequency resources allocated to the reference signal of the second cell. Wherein, the transmission power of the PDSCH data of the first cell is different from the transmission power of the reference signal of the second cell.
The resource allocation information of the PDSCH data of the first cell includes interference indication information indicating whether or not the time-frequency resources are multiplexed, for example, 1 indicates that the time-frequency resources are multiplexed and 0 indicates that the time-frequency resources are not multiplexed. The resource configuration information of PDSCH data of the first cell further includes one or more of:
The identity of the first cell, such as the cell PCI obtained through PSS and SSS,
Downlink frequency point information of PDSCH data of the first cell,
The periodic configuration of PDSCH data of the first cell includes: time domain occupancy information for indicating a time domain symbol occupied by PDSCH data of the first cell and frequency domain occupancy information for indicating a frequency domain subcarrier occupied by PDSCH data of the first cell,
Transmission power of PDSCH data of the first cell.
Step 150: the first base station adds the interference indication information of whether the time-frequency resource is multiplexed to the resource allocation information of the PDSCH data of the first cell and sends the information to the terminal of the first cell.
The first base station transmits resource configuration information of PDSCH data of the first cell added with the interference indication information to idle-state terminals in the first cell through a broadcast message.
The first base station transmits resource allocation information of PDSCH data of the first cell to which the interference indication information is added to the terminal in a connected state in the first cell through RRC (Radio Resource Control ) signaling.
The resource allocation information of the PDSCH data of the first cell includes interference indication information indicating whether or not the time-frequency resources are multiplexed, for example, 1 indicates that the time-frequency resources are multiplexed and 0 indicates that the time-frequency resources are not multiplexed. The resource configuration information of the PDSCH data of the transmitted first cell further includes one or more of:
The identity of the first cell, such as the cell PCI obtained through PSS and SSS,
Downlink frequency point information of PDSCH data of the first cell,
The periodic configuration of PDSCH data of the first cell includes: time domain occupancy information for indicating a time domain symbol occupied by PDSCH data of the first cell and frequency domain occupancy information for indicating a frequency domain subcarrier occupied by PDSCH data of the first cell,
The transmit power of PDSCH data of the first cell,
Frame structure configuration of the first cell: in the case of TDD (Time Division Duplexing), time division duplex) mode, this term needs to be given.
Step 160: after receiving the resource allocation information of the PDSCH data of the first cell, the terminal of the first cell demodulates the multiplexed time-frequency resources by using a serial interference cancellation (Successive Interference Cancellation, SIC) technique based on the indication of the interference indication information therein, or demodulates the non-multiplexed time-frequency resources, for example, a certain resource block is only allocated to the first cell for PDSCH data transmission, and performs conventional demodulation according to the PDCCH (Physical Downlink Control Channel ) indication message based on the indication of the interference indication information therein.
The terminal demodulating the multiplexed time-frequency resource using the serial interference cancellation technique based on the indication of the interference indication information includes, for example: when the terminal determines that the time-frequency resources are multiplexed based on the indication of the interference indication information, firstly, a signal with the maximum intensity is detected from the received original signal through a pre-equalization detection algorithm, such as a zero-breaking algorithm or a minimum mean square error algorithm, and the like, and is demodulated and reconstructed, then whether the reconstructed signal is the required PDSCH data of the first cell is judged, if so, the detection is stopped, if not, the reconstructed signal serving as the interference is subtracted from the original signal, and the next detection is started, and the cycle is performed until the required PDSCH data of the first cell is detected.
In the above embodiment, the PDSCH data of the first cell of the first base station is remapped to the time-frequency resource of the reference signal of the second cell of the second base station, so that the spectrum efficiency is improved, and the first base station sends the interference indication information whether the time-frequency resource is multiplexed to the terminal of the first cell, so that the terminal performs accurate interference cancellation according to the indication. The method has small influence on the terminal and good backward compatibility and deployment feasibility. The scheme is to enhance the existing protocol, has small protocol modification, does not introduce a new protocol process, and has lower implementation difficulty.
Based on the foregoing embodiments, an application example is described below in conjunction with fig. 2, mainly describing time-frequency resource multiplexing and interference cancellation between two dynamic spectrum sharing base stations. The spectrum sharing base station is a first base station and a second base station. The first base station is, for example, a 5G base station, that is, NR (New Radio) gNB, and is set to gNB1, and a first cell of the first base station is set to cell 1. The second base station 4G, i.e., LTE (Long Term Evolution ) eNB, is referred to as eNB1, and the second cell of the second base station is referred to as cell 2. The shared frequency band of the two base stations is 2.1 GHz FDD (Frequency Division Duplexing, frequency division duplex) frequency band. The two base stations are connected by optical fibers. A schematic diagram of co-channel interference and a schematic diagram of time-frequency resource multiplexing of two base stations are shown in fig. 3a and 3b, respectively.
Fig. 2 shows a flow chart of an information transmission method according to other embodiments of the present disclosure.
As shown in fig. 2, the information transmission method of this embodiment includes: steps 210-260.
Step 210: gNB1 obtains CRS (CELL REFERENCE SIGNAL ) resource configuration information of a cell 2 in eNB1 through an interface between the gNB1 and the eNB1, wherein gNB1 and eNB1 adopt different air interface modes, and the CRS configuration information of the cell 2 comprises the following information:
Cell 2 identity: PCI information
Cell 2 downlink frequency point information 2.1GHz
Single antenna port number: 0
A resource configuration of a reference signal, comprising: time domain occupancy information: 1 st and 4 th OFDM (Orthogonal Frequency Division Multiplexing th, orthogonal frequency division multiplexing) symbols, frequency domain occupancy information: two subcarriers spaced apart by 6 subcarriers within each OFDM symbol,
Transmit power information: assume that the CRS power of configured cell 2 is 18.2dBm
Step 220: and determining that the cell 1 of the gNB1 and the cell 2 of the eNB1 have a transmission association relationship and a pairing relationship of the dynamic spectrum sharing cells according to the pre-configuration information.
Step 230: the eNB1 obtains a pairing relation between the cell 1 and the cell 2 through a direct interface with the gNB1, and the eNB1 maps the CRS of the cell 2 onto a corresponding RE (Resource Element) according to the pairing relation, for example, based on NOMA (non-orthogonal multiple-access) technology. The eNB1 sends CRS configuration information of a cell 2 to the gNB1, where the CRS configuration information of the cell 2 includes:
Cell 2 identity: PCI information
Cell 2 downlink frequency point information 2.1GHz
Single antenna port number: 0
A resource configuration of a reference signal, comprising: time domain occupancy information: OFDM symbols 1 and 4, and frequency domain occupancy information: two subcarriers spaced apart by 6 subcarriers within each OFDM symbol,
Interference indication information: set to 1, indicating that the time-frequency resource is multiplexed
Transmit power information: assume that the power configured for the CRS of cell 2 is 18.2dBm.
Step 240: the gNB1 remaps PDSCH data of the cell 1 to time-frequency resources allocated to the CRS of the cell 2 according to the transmission association relation with the eNB1 and the configuration information of the CRS of the cell 2, for example, based on NOMA technology. On REs employing NOMA technology, PDSCH data of cell 1 is allocated with different transmission power from CRS of cell 2.
A schematic diagram of co-channel interference and a schematic diagram of time-frequency resource multiplexing of two base stations are shown in fig. 3a and 3b, respectively. In fig. 3b, R represents CRS, and D represents PDSCH data.
Configuration information (RE configuration information) of PDSCH data of cell 1 includes, but is not limited to, the following information:
cell 1 identity: PCI information
Cell 1 downlink frequency point information 2.1GHz
PDSCH resource configuration, including: time domain occupancy information: OFDM symbols 1 and 4, and frequency domain occupancy information: two subcarriers spaced apart by 6 subcarriers within each OFDM symbol
Interference indication information: set to 1, indicating that the time-frequency resource is multiplexed
Transmit power information: assume that the power configured for PDSCH is 15.2dBm.
Step 250: the gNB1 transmits configuration information of PDSCH data traffic of the cell 1, which adopts NOMA technology, to the terminal.
The gNB1 transmits configuration information of PDSCH data traffic of the cell 1, which adopts NOMA technology, to idle state terminals in the cell 1 through a broadcast message.
GNB1 transmits configuration information of PDSCH data service of cell 1 using NOMA technology to a terminal in a connection state in cell 1 through RRC signaling
Configuration information (RE configuration information) of PDSCH data of cell 1 transmitted by the gNB1 includes, but is not limited to, the following information:
cell 1 identity: PCI information
Cell 1 downlink frequency point information 2.1GHz
PDSCH resource configuration, including: time domain occupancy information: OFDM symbols 1 and 4, and frequency domain occupancy information: two subcarriers spaced apart by 6 subcarriers within each OFDM symbol
Interference indication information: set to 1, indicating that the time-frequency resource is multiplexed
Transmit power information: assume that the power configured for PDSCH is 15.2dBm.
Step 260: after receiving the resource allocation information of the PDSCH data of the cell 1, the terminal of the cell 1 demodulates the RE adopting the NOMA technology by a Serial Interference Cancellation (SIC) technology; for the time-frequency resource block which is allocated to the PDSCH data and does not adopt NOMA technology, the resource block is only allocated to the first cell for PDSCH data transmission, so the terminal can perform conventional demodulation according to the PDCCH indication message after receiving the message.
Demodulation by the Serial Interference Cancellation (SIC) technique specifically includes: after receiving the configuration information of the time-frequency resource block, the terminal firstly detects the signal with the maximum intensity through a pre-equalization detection algorithm such as zero breaking or minimum mean square error and the like based on a step-by-step interference elimination strategy, demodulates and reconstructs the signal, then judges whether the reconstructed signal is a required signal (namely the PDSCH data of the cell 1), if not, subtracts the reconstructed signal from the original signal, and starts the next detection, and the cycle is performed until the required PDSCH data signal is detected.
In the above embodiment, PDSCH data of the 5G base station cell is remapped to the time-frequency resource of the reference signal of the 4G base station cell, so as to improve spectrum efficiency, and the 5G base station sends the interference indication information about whether the time-frequency resource is multiplexed to the terminal of its cell, so that the terminal performs accurate interference cancellation according to the indication. The method has small influence on the terminal and good backward compatibility and deployment feasibility. The scheme is to enhance the existing protocol, has small protocol modification, does not introduce a new protocol process, and has lower implementation difficulty.
Fig. 4 illustrates a schematic diagram of an information transfer system of some embodiments of the present disclosure.
As shown in fig. 4, the information transmission system 40 of this embodiment includes: a first base station 410, a second base station 420, and a terminal 430.
The first base station 410 is configured to obtain resource configuration information of reference signals of all cells of the second base station, determine that the first cell and the second cell are a pairing relationship of dynamic spectrum sharing cells according to a transmission association relationship of the first cell of the first base station and the second cell of the second base station, remap physical downlink shared channel PDSCH data of the first cell onto time-frequency resources allocated to the reference signals of the second cell, add interference indication information whether the time-frequency resources are multiplexed to the resource configuration information of the PDSCH data of the first cell, and send the interference indication information to a terminal of the first cell.
The second base station 420 is configured to send the resource configuration information of the reference signals of all cells of the second base station to the first base station, and send the resource configuration information of the reference signals of the second cell of the second base station having a transmission association relationship with the first cell of the first base station to the first base station after adding interference indication information whether the time-frequency resources are multiplexed.
The terminal 430 is configured to demodulate the multiplexed time-frequency resources using a serial interference cancellation technique based on an indication of interference indication information whether the time-frequency resources transmitted by the first base station are multiplexed.
Fig. 5 illustrates a schematic diagram of a first base station of some embodiments of the present disclosure.
As shown in fig. 5, the first base station 410 of this embodiment includes:
A receiving module 411 configured to obtain resource configuration information of reference signals of all cells of the second base station;
a determining module 412, configured to determine, according to a transmission association relationship between a first cell of the first base station and a second cell of the second base station, that the first cell and the second cell are a pairing relationship of dynamic spectrum sharing cells;
A complex mapping module 413 configured to complex-map the physical downlink shared channel PDSCH data of the first cell onto the time-frequency resources allocated to the reference signal of the second cell;
And a transmitting module 414 configured to add the interference indication information of whether the time-frequency resource is multiplexed to the resource configuration information of the PDSCH data of the first cell and transmit the information to the terminal of the first cell, so that the terminal demodulates the multiplexed time-frequency resource by using the serial interference cancellation technology based on the indication of the interference indication information.
A transmitting module 414 configured to transmit resource configuration information of PDSCH data of the first cell to which the interference indication information is added to an idle state terminal in the first cell through a broadcast message; or, transmitting the resource configuration information of the PDSCH data of the first cell added with the interference indication information to the terminal in the connection state in the first cell through RRC signaling.
The reference signal of the second cell is mapped onto corresponding time-frequency resource by the second base station, the PDSCH data of the first cell is mapped onto the time-frequency resource allocated to the reference signal of the second cell by the first base station, wherein the transmission power of the PDSCH data of the first cell is different from the transmission power of the reference signal of the second cell.
Fig. 6 shows a schematic diagram of a first base station of other embodiments of the present disclosure.
As shown in fig. 6, the first base station 410 of this embodiment includes: a memory 415 and a processor 416 coupled to the memory 415, the processor 416 being configured to perform the information transmission method of any of the foregoing embodiments based on instructions stored in the memory 415.
For example, the first base station acquires resource configuration information of reference signals of all cells of the second base station; the first base station determines that the first cell and the second cell are the pairing relationship of the dynamic spectrum sharing cell according to the transmission association relationship of the first cell of the first base station and the second cell of the second base station; the first base station re-maps the physical downlink shared channel PDSCH data of the first cell to the time-frequency resource of the reference signal allocated to the second cell; the first base station adds interference indication information whether the time-frequency resources are multiplexed to resource allocation information of PDSCH data of the first cell and sends the information to a terminal of the first cell, so that the terminal demodulates the multiplexed time-frequency resources by using a serial interference elimination technology based on the indication of the interference indication information.
The memory 415 may include, for example, system memory, fixed nonvolatile storage media, and the like. The system memory stores, for example, an operating system, application programs, boot Loader (Boot Loader), and other programs.
Some embodiments of the present disclosure propose a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor implements steps of an information transmission method.
It will be appreciated by those skilled in the art that embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more non-transitory computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flowchart and/or block of the flowchart illustrations and/or block diagrams, and combinations of flowcharts and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing description of the preferred embodiments of the present disclosure is not intended to limit the disclosure, but rather to enable any modification, equivalent replacement, improvement or the like, which fall within the spirit and principles of the present disclosure.
Claims (14)
1. An information transmission method, comprising:
The method comprises the steps that a first base station obtains resource allocation information of reference signals of all cells of a second base station;
The first base station determines that the first cell and the second cell are the pairing relationship of the dynamic spectrum sharing cell according to the transmission association relationship of the first cell of the first base station and the second cell of the second base station;
The first base station re-maps the PDSCH data of the physical downlink shared channel of the first cell to the time-frequency resource of the reference signal allocated to the second cell, and allocates the transmission power different from the reference signal of the second cell to the PDSCH data of the first cell on the multiplexed time-frequency resource so as to perform interference elimination;
The first base station adds interference indication information of whether the time-frequency resource is multiplexed to resource allocation information of PDSCH data of the first cell and sends the information to a terminal of the first cell, so that the terminal demodulates the multiplexed time-frequency resource by using a serial interference elimination technology based on the indication of the interference indication information, and the method comprises the following steps: when the terminal determines that the time-frequency resources are multiplexed based on the indication of the interference indication information, firstly, a signal with the maximum intensity is detected from the received original signals through a pre-equalization detection algorithm, demodulation and reconstruction are carried out, then whether the reconstructed signal is the required PDSCH data of the first cell is judged, if yes, the detection is stopped, if no, the reconstructed signal serving as the interference is subtracted from the original signal, the next detection is started, and the cycle is carried out until the required PDSCH data of the first cell is detected.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The reference signals of the second cell are mapped by the second base station onto corresponding time-frequency resources,
PDSCH data of the first cell is remapped by the first base station to time-frequency resources allocated to the reference signal of the second cell,
Wherein, the transmission power of the PDSCH data of the first cell is different from the transmission power of the reference signal of the second cell.
3. The method of claim 1, wherein the first base station transmitting the resource configuration information of the PDSCH data of the first cell to the terminal of the first cell comprises:
The first base station sends resource allocation information of PDSCH data of a first cell added with the interference indication information to an idle state terminal in the first cell through a broadcast message; or alternatively, the first and second heat exchangers may be,
And the first base station sends the resource configuration information of the PDSCH data of the first cell added with the interference indication information to the terminal in the connection state in the first cell through RRC signaling.
4. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The resource configuration information of PDSCH data of the first cell, which is transmitted to the terminal by the first base station, includes interference indication information whether time-frequency resources are multiplexed, and includes one or more of the following:
The identity of the first cell is determined,
Downlink frequency point information of PDSCH data of the first cell,
The periodic configuration of PDSCH data of the first cell includes: time domain occupancy information for indicating a time domain symbol occupied by PDSCH data of the first cell and frequency domain occupancy information for indicating a frequency domain subcarrier occupied by PDSCH data of the first cell,
Transmission power of PDSCH data of the first cell.
5. The method as recited in claim 1, further comprising:
The first base station receives resource allocation information of a reference signal of a second cell sent by the second base station, wherein the resource allocation information comprises interference indication information whether time-frequency resources are multiplexed or not, and comprises one or more of the following:
the identity of the second cell is determined,
The reference signal of the second cell occupies the carrier frequency,
The reference signal of the second cell occupies the carrier bandwidth,
The reference signal of the second cell occupies the antenna port,
A periodic configuration of reference signals of a second cell, comprising: time domain occupancy information for indicating a time domain symbol occupied by a reference signal of the second cell and frequency domain occupancy information for indicating a frequency domain subcarrier occupied by the reference signal of the second cell,
The transmit power of the reference signal of the second cell.
6. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The method comprises the steps that a first base station obtains resource allocation information of reference signals of all cells of a second base station through an interface between the first base station and the second base station, wherein the first base station and the second base station adopt different air interface systems.
7. The method of claim 1, wherein the resource configuration information of the reference signals of all cells of the second base station acquired by the first base station comprises:
The identity of the cell(s),
The downlink frequency point information of the cell,
A periodic configuration of reference signals, comprising: time domain occupancy information for indicating time domain symbols occupied by the reference signal and frequency domain occupancy information for indicating frequency domain subcarriers occupied by the reference signal,
Transmit power information of the reference signal.
8. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The first base station determines that a transmission association relationship exists between a first cell of the first base station and a second cell of the second base station according to preconfiguration information configured by a network management, wherein the existence of the transmission association relationship indicates that the first cell and the second cell perform data receiving and transmitting operations through the same RRU and an antenna at the same time and same frequency.
9. The method of claim 1, wherein the terminal demodulating the multiplexed time-frequency resources using a serial interference cancellation technique based on the indication of the interference indication information comprises:
When the terminal determines that the time-frequency resources are multiplexed based on the indication of the interference indication information, firstly, a signal with the maximum intensity is detected from the received original signals through a pre-equalization detection algorithm, demodulation and reconstruction are carried out, then whether the reconstructed signal is the required PDSCH data of the first cell is judged, if yes, the detection is stopped, if no, the reconstructed signal serving as the interference is subtracted from the original signals, the next detection is started, and the cycle is carried out until the required PDSCH data of the first cell is detected.
10. The method of claim 9, wherein the step of determining the position of the substrate comprises,
The pre-equalization detection algorithm includes a zero-breaking algorithm or a minimum mean square error algorithm.
11. A base station, comprising:
A memory; and
A processor coupled to the memory, the processor configured to perform the information transmission method of any of claims 1-8 based on instructions stored in the memory.
12. A base station, comprising:
the receiving module is configured to acquire resource configuration information of reference signals of all cells of the second base station;
The determining module is configured to determine that the first cell and the second cell are the pairing relationship of the dynamic spectrum sharing cell according to the transmission association relationship of the first cell of the first base station and the second cell of the second base station;
A complex mapping module configured to complex-map the PDSCH data of the physical downlink shared channel of the first cell onto the time-frequency resources allocated to the reference signal of the second cell, and allocate different transmission power for the PDSCH data of the first cell from the reference signal of the second cell on the multiplexed time-frequency resources, so as to perform interference cancellation;
A transmitting module configured to add interference indication information whether time-frequency resources are multiplexed to resource configuration information of PDSCH data of a first cell and transmit the information to a terminal of the first cell, so that the terminal demodulates the multiplexed time-frequency resources by using a serial interference cancellation technique based on an indication of the interference indication information, including: when the terminal determines that the time-frequency resources are multiplexed based on the indication of the interference indication information, firstly, a signal with the maximum intensity is detected from the received original signals through a pre-equalization detection algorithm, demodulation and reconstruction are carried out, then whether the reconstructed signal is the required PDSCH data of the first cell is judged, if yes, the detection is stopped, if no, the reconstructed signal serving as the interference is subtracted from the original signal, the next detection is started, and the cycle is carried out until the required PDSCH data of the first cell is detected.
13. An information transmission system, comprising:
A first base station, a second base station and a terminal,
Wherein:
the first base station is a base station according to claim 11 or 12,
The second base station is configured to send the resource allocation information of the reference signals of all cells of the second base station to the first base station, and to send the resource allocation information of the reference signals of the second cell of the second base station having a transmission association relation with the first cell of the first base station to the first base station after adding interference indication information whether the time-frequency resources are multiplexed,
The terminal is configured to demodulate the multiplexed time-frequency resources using a serial interference cancellation technique based on an indication of interference indication information whether the time-frequency resources are multiplexed, which is transmitted by the first base station, comprising: when the terminal determines that the time-frequency resources are multiplexed based on the indication of the interference indication information, firstly, a signal with the maximum intensity is detected from the received original signals through a pre-equalization detection algorithm, demodulation and reconstruction are carried out, then whether the reconstructed signal is the required PDSCH data of the first cell is judged, if yes, the detection is stopped, if no, the reconstructed signal serving as the interference is subtracted from the original signal, the next detection is started, and the cycle is carried out until the required PDSCH data of the first cell is detected.
14. A non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the information transmission method of any of claims 1-10.
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| CN110290532A (en) * | 2013-12-30 | 2019-09-27 | 华为技术有限公司 | A kind of disturbance coordination method, apparatus and system |
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| WO2017207614A1 (en) * | 2016-05-31 | 2017-12-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatuses for providing parameter coordination for base stations and wireless devices |
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