CN115150035A - Information transmission method and system and base station - Google Patents
Information transmission method and system and base station Download PDFInfo
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- CN115150035A CN115150035A CN202110331613.3A CN202110331613A CN115150035A CN 115150035 A CN115150035 A CN 115150035A CN 202110331613 A CN202110331613 A CN 202110331613A CN 115150035 A CN115150035 A CN 115150035A
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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
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Abstract
The disclosure provides an information transmission method, an information transmission system and a base station, and relates to the field of wireless communication. The method comprises the steps that a first base station acquires resource configuration information of reference signals of all cells of a second base station; determining that a first cell and a second cell are a pairing relation of a dynamic spectrum sharing cell according to a transmission incidence relation of the first cell of a first base station and the second cell of a 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 into the resource configuration information of the PDSCH data of the first cell and sending the resource configuration information to the terminal of the first cell, so that the terminal demodulates the multiplexed time-frequency resources by utilizing a serial interference elimination technology based on the indication of the interference indication information. The frequency spectrum efficiency is improved through multiplexing, and the interference indication information of whether the time frequency resources are multiplexed is sent to the terminal, so that the terminal can accurately eliminate the interference 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 technical features of supporting ultra wide band, large connection and the like. Current 4G (4) th And 4 th generation) wireless communication technology is generally lower than 5G commercial frequency points, and the utilization rate of 4G spectrum is still insufficient, so operators and equipment manufacturers propose a dynamic spectrum sharing technology. Based on this technique, 5G users can receive and transmit 5G physical layer signals over the original 4G spectrum, and 4G users and 5G users can share the same spectrum in order to improve spectrum utilization efficiency. However, the 4G users and the 5G users share the same frequency spectrum, which causes relatively large interference between the 4G users and the 5G users.
Disclosure of Invention
According to the embodiment of the disclosure, 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 indicating whether the time-frequency resource is multiplexed to the 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:
a first base station acquires resource configuration information of reference signals of all cells of a second base station;
the first base station determines that a first cell and a second cell are a pairing relation of a dynamic spectrum sharing cell according to the transmission incidence relation of the first cell of the first base station and the second cell of the second base station;
the first base station remaps 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 of whether the time-frequency resources are multiplexed to resource configuration information of PDSCH data of the first cell and sends the resource configuration 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 signals of the second cell are mapped by the second base station onto corresponding time-frequency resources, and the PDSCH data of the first cell is re-mapped by the first base station onto the time-frequency resources allocated to the reference signals 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 signals of the second cell.
In some embodiments, the transmitting, by the first base station, the resource configuration information of the PDSCH data of the first cell to the terminal of the first cell includes:
the first base station sends the resource configuration information of the PDSCH data of the first cell added with the interference indication information to an idle terminal in the first cell through a broadcast message; or the like, or, alternatively,
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 a connected terminal 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 following:
the identity of the first cell is determined,
downlink frequency point information of PDSCH data of the first cell,
the periodic configuration of the PDSCH data of the first cell comprises the following steps: time domain occupancy information indicating time domain symbols occupied by the PDSCH data of the first cell and frequency domain occupancy information indicating frequency domain subcarriers occupied by the PDSCH data of the first cell,
transmit power of PDSCH data of the first cell.
In some embodiments, further comprising: the first base station receives resource configuration information of a reference signal of a second cell sent by a second base station, wherein the resource configuration information comprises interference indication information whether time-frequency resources are multiplexed or not, and the interference indication information 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 an antenna port,
the periodic configuration of the reference signal of the second cell comprises: time domain occupancy information for a time domain symbol indicating occupancy of a reference signal by the second cell and frequency domain occupancy information for frequency domain subcarriers indicating occupancy of the reference signal by the second cell,
a transmit power of a reference signal of the second cell.
In some embodiments, the first base station acquires resource configuration information of reference signals of all cells of the second base station through an interface with the second base station, where the first base station and the second base station use 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 or cells is determined,
the information of the downlink frequency point of the cell,
a periodic configuration of a reference signal, comprising: time domain occupancy information indicating time domain symbols occupied by the reference signal and frequency domain occupancy information indicating frequency domain subcarriers occupied by the reference signal,
transmission power information of the reference signal.
In some embodiments, the first base station determines, according to the preconfigured information configured by the network manager, that a transmission association relationship exists between a first cell of the first base station and a second cell of the second base station, and the existence of the transmission association relationship indicates that the first cell and the second cell perform data transceiving operation through the same radio remote unit RRU and antenna at the same time and in the same frequency.
In some embodiments, the terminal demodulating the multiplexed time-frequency resources using the successive interference cancellation technique based on the indication of the interference indication information comprises:
and the terminal detects a signal with the maximum intensity from the received original signal through a pre-equalization detection algorithm under the condition that the time-frequency resource is determined to be multiplexed based on the indication of the interference indication information, demodulates and reconstructs the signal, judges whether the reconstructed signal is the PDSCH data of the required first cell or not, stops detection if the reconstructed signal is the PDSCH data of the required first cell, subtracts the reconstructed signal serving as interference from the original signal and starts the next detection if the reconstructed signal is not the PDSCH data of the required first cell, and circulates in such a way until the PDSCH data of the required first cell is detected.
In some embodiments, the pre-equalization detection algorithm comprises 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 transfer method based on instructions stored in the memory.
Some embodiments of the present disclosure provide a base station, including:
a receiving module configured to acquire resource configuration information of reference signals of all cells of a second base station;
a determining module configured to determine that a first cell of a first base station and a second cell of a second base station are a pairing relation of dynamic spectrum sharing cells according to a transmission association relation of the first cell and the second cell;
a remapping module configured to remap Physical Downlink Shared Channel (PDSCH) data of a first cell to time-frequency resources of a reference signal allocated to a 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 resource configuration 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: 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 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 which has a transmission incidence relation with the first cell of the first base station to the first base station after adding interference indication information whether time-frequency resources are multiplexed or not,
the terminal is configured to demodulate the multiplexed time-frequency resources using a successive interference cancellation technique based on an indication of interference indication information whether the time-frequency resources are multiplexed or not transmitted by the first base station.
Some embodiments of the present disclosure propose 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 one of claims 1-10.
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The drawings that will be used 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, which proceeds with reference to the accompanying drawings.
It should be apparent that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived by those of ordinary skill in the art without inventive exercise.
Fig. 1 shows a flow diagram of an information transmission method of some embodiments of the present disclosure.
Fig. 2 is a flow chart illustrating an information transmission method according to further embodiments of the present disclosure.
Fig. 3a and 3b show diagrams of co-channel interference and time-frequency resource multiplexing according to some embodiments of the disclosure.
Fig. 4 shows a schematic diagram of an information transmission system of some embodiments of the present disclosure.
Fig. 5 shows 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 further 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", etc. in this disclosure are used to distinguish different objects, and are not used to indicate the meaning of size or timing, etc.
Fig. 1 shows a flow diagram of an information transmission method of 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 configuration information of reference signals of all cells of the second base station.
The first base station acquires resource configuration information of reference signals of all cells in the second base station through an interface 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:
an identity of a Cell, such as a Cell PCI (Physical Cell Identifier) acquired by PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal);
downlink frequency point information of the 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;
transmission power information of reference signal: indicating the transmit power allocated to the reference signal.
Step 120: the first base station determines that the first cell and the second cell are a pairing relation of a dynamic spectrum sharing cell according to the transmission association relation 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 first cell of the first base station and a second cell of the second base station have a transmission association relationship according to the pre-configuration information, and the existence of the transmission association relationship indicates that the first cell and the second cell perform data receiving and transmitting operations with the same frequency through the same Radio Remote Unit (RRU) and antenna. Wherein, the pre-configuration information can be configured by the network manager.
Step 130: the second base station obtains the pairing relation of the dynamic spectrum sharing cells 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 signals of the second cell with the pairing relation to corresponding time frequency resources, and sends resource configuration information of the reference signals of the second cell to the first base station.
The resource configuration information of the reference signal of the second cell includes interference indication information whether the time-frequency resource is multiplexed, for example, a value of 1 indicates that the time-frequency resource is multiplexed, and a value of 0 indicates that the time-frequency resource is not multiplexed. The resource configuration information of the reference signal of the second cell further includes one or more of:
identification of the second cell: such as cell PCI acquired by 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 the carrier bandwidth, taking Physical Resource Block (PRB) as a unit,
number of antenna ports: the reference signal of the second cell occupies an antenna port,
the periodic configuration of the reference signal of the second cell comprises: time domain occupancy information for a time domain symbol indicating occupancy of a reference signal by the second cell and frequency domain occupancy information for frequency domain subcarriers indicating occupancy of a reference signal by the second cell,
a transmit power of a reference signal of the second cell.
Step 140: the first base station receives resource configuration 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 remaps PDSCH (Physical Downlink shared Channel) data of the first cell associated with the second cell to the time-frequency resource allocated to the reference signal of the second cell. And transmitting the PDSCH data of the first cell with different transmission power from the reference signal of the second cell.
The configured resource configuration information of the PDSCH data of the first cell includes interference indication information whether the time-frequency resources are multiplexed, for example, a value of 1 indicates that the time-frequency resources are multiplexed, and a value of 0 indicates that the time-frequency resources are not multiplexed. The resource configuration information of the PDSCH data of the first cell further includes one or more of:
the identity of the first cell, such as the cell PCI acquired by PSS and SSS,
downlink frequency point information of PDSCH data of the first cell,
the periodic configuration of the PDSCH data of the first cell comprises the following steps: time domain occupancy information indicating time domain symbols occupied by the PDSCH data of the first cell and frequency domain occupancy information indicating frequency domain subcarriers occupied by the PDSCH data of the first cell,
transmit power of PDSCH data of the first cell.
Step 150: and the first base station adds 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 sends the resource configuration information to the terminal of the first cell.
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 an idle terminal in the first cell through a broadcast message.
The first base station sends the Resource configuration information of the PDSCH data of the first cell added with the interference indication information to a connected terminal in the first cell through an RRC (Radio Resource Control) signaling.
The resource configuration information of the PDSCH data of the first cell includes interference indication information whether the time-frequency resources are multiplexed, for example, a value of 1 indicates that the time-frequency resources are multiplexed, and a value of 0 indicates that the time-frequency resources are not multiplexed. The resource configuration information of the transmitted PDSCH data of the first cell further includes one or more of:
the identity of the first cell, such as the cell PCI acquired by PSS and SSS,
downlink frequency point information of PDSCH data of the first cell,
the periodic configuration of PDSCH data of a first cell comprises: time domain occupancy information indicating time domain symbols occupied by the PDSCH data of the first cell and frequency domain occupancy information indicating frequency domain subcarriers occupied by the PDSCH data of the first cell,
the transmit power of the PDSCH data of the first cell,
frame structure configuration of the first cell: this entry needs to be given in case of TDD (Time Division duplex) mode.
Step 160: after receiving the resource configuration information of the PDSCH data of the first cell, the terminal of the first cell demodulates the multiplexed time-frequency resources by using a Successive Interference Cancellation (SIC) technique based on the indication of the Interference indication information therein, or demodulates the time-frequency resources that are not multiplexed, for example, a certain resource block is allocated only to the first cell for PDSCH data transmission based on the indication of the Interference indication information therein, and performs conventional demodulation according to a PDCCH (Physical Downlink Control Channel) indication message.
The terminal demodulates the multiplexed time-frequency resources by using the successive interference cancellation technique based on the indication of the interference indication information, for example, including: the terminal detects a signal with the maximum intensity from a received original signal through a pre-equalization detection algorithm, such as a zero-breaking algorithm or a minimum mean square error algorithm, and performs demodulation and reconstruction under the condition that the time-frequency resource is determined to be multiplexed based on the indication of the interference indication information, then judges whether the reconstructed signal is the PDSCH data of the required first cell or not, stops the detection if the reconstructed signal is the PDSCH data of the required first cell, subtracts the reconstructed signal serving as the interference from the original signal if the reconstructed signal is not the PDSCH data of the required first cell, and starts the next detection, and the process is circulated until the PDSCH data of the required 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 as to improve the spectrum efficiency, and the first base station sends the interference indication information indicating 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 has good backward compatibility and deployment feasibility. The scheme is enhanced on the existing protocol, the protocol change is small, a new protocol process is not introduced, and the realization difficulty is low.
Based on the foregoing embodiment, an application example is described below with reference to fig. 2, which mainly describes 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. For example, the first base station is a 5G base station, that is, NR (New Radio, new air interface) gbb, which is set as gbb 1, and a first cell of the first base station is set as cell 1. The second base station 4G base station, 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 Frequency band shared by the two base stations is 2.1GHz FDD (Frequency Division duplex). The two base stations are connected by optical fibers. The schematic diagram of co-channel interference and the schematic diagram of time-frequency resource multiplexing of two base stations are shown in fig. 3a and 3b, respectively.
Fig. 2 is a flow chart illustrating an information transmission method according to further embodiments of the present disclosure.
As shown in fig. 2, the information transmission method of this embodiment includes: steps 210-260.
Step 210: the gNB1 acquires, through an interface with the eNB1, CRS (Cell reference signal) resource configuration information of a Cell 2 in the eNB1, wherein the gNB1 and the eNB1 use different air interface systems, and the CRS configuration information of the Cell 2 includes the following information:
2.1GHz downlink frequency point information of cell 2
Single antenna port number: 0
Resource allocation of reference signals, comprising: time domain occupancy information: 1 st and 4 th OFDM (Orthogonal Frequency Division Multiplexing) symbols, frequency domain occupancy information: two subcarriers spaced apart by 6 subcarriers within each OFDM symbol,
transmission power information: assume CRS power of configured cell 2 is 18.2dBm
Step 220: and the gNB1 determines 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 cell according to the pre-configuration information.
Step 230: the eNB1 obtains a pairing relationship 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 to a corresponding RE (Resource Element) according to the pairing relationship, for example, based on a non-orthogonal multiple-access (NOMA) technique. The eNB1 sends CRS configuration information of the cell 2 to the gNB1, where the CRS configuration information of the cell 2 includes:
2.1GHz downlink frequency point information of cell 2
Single antenna port number: 0
Resource allocation of reference signals, comprising: time domain occupancy information: 1 st and 4 th OFDM symbols, and frequency domain occupancy information: two subcarriers spaced apart by 6 subcarriers within each OFDM symbol,
interference indication information: setting to 1 indicates that the time frequency resource is multiplexed
Transmission power information: assume that the power configured for CRS of cell 2 is 18.2dBm.
Step 240: the gNB1, according to the transmission association relationship with the eNB1 and the configuration information of the CRS of the cell 2, for example, based on the NOMA technology, re-maps the PDSCH data of the cell 1 to the time-frequency resources of the CRS allocated to the cell 2. On REs that employ NOMA technique, PDSCH data of cell 1 is allocated a different transmit power than CRS of cell 2.
The schematic diagram of co-channel interference and the schematic diagram of time-frequency resource multiplexing of two base stations are shown in fig. 3a and 3b, respectively. In fig. 3b, R denotes CRS and D denotes PDSCH data.
The configuration information (RE configuration information) of PDSCH data of cell 1 includes, but is not limited to, the following information:
PDSCH resource allocation, comprising: time domain occupancy information: 1 st and 4 th OFDM symbols, and frequency domain occupancy information: two subcarriers spaced by 6 subcarriers within each OFDM symbol
Interference indication information: setting to 1 indicates that the time frequency resource is multiplexed
Transmission power information: assume that the power configured for PDSCH is 15.2dBm.
Step 250: and the gNB1 transmits the configuration information of the PDSCH data traffic of the cell 1, which adopts the NOMA technology, to the terminal.
The gNB1 transmits configuration information of the PDSCH data traffic of the cell 1, which adopts the NOMA technology, to the idle terminal in the cell 1 through a broadcast message.
The gNB1 sends configuration information of PDSCH data traffic of the cell 1, which adopts the NOMA technology, to the connected terminal in the cell 1 through RRC signaling
The configuration information (RE configuration information) of PDSCH data of cell 1 transmitted by the gNB1 includes, but is not limited to, the following information:
PDSCH resource allocation, comprising: time domain occupancy information: 1 st and 4 th OFDM symbols, and frequency domain occupancy information: two subcarriers spaced by 6 subcarriers within each OFDM symbol
Interference indication information: setting to 1 indicates that the time frequency resource is multiplexed
Transmission power information: assume that the power configured for PDSCH is 15.2dBm.
Step 260: after receiving the resource configuration information of the PDSCH data of the cell 1, the terminal of the cell 1 demodulates the RE adopting the NOMA technology through a Serial Interference Cancellation (SIC) technology; for the time-frequency resource block which is allocated to the PDSCH data and does not adopt the NOMA technology, the resource block is only allocated to the first cell for PDSCH data transmission, so that the terminal can perform conventional demodulation according to the PDCCH indication message after receiving the message.
The demodulation by the Successive Interference Cancellation (SIC) technique specifically includes: after receiving the configuration information of the time-frequency resource block, the terminal 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, judges whether the reconstructed signal is a required signal (namely PDSCH data of the cell 1), subtracts the reconstructed signal from an original signal if the reconstructed signal is not the required signal, starts the next detection, and circulates the steps until the required PDSCH data signal is detected.
In the above embodiment, the PDSCH data of the cell of the 5G base station is remapped to the time-frequency resources of the reference signals of the cell of the 4G base station, so as to improve the spectrum efficiency, and the 5G base station sends the interference indication information indicating whether the time-frequency resources are multiplexed to the terminal of the cell, so that the terminal performs accurate interference cancellation according to the indication. The method has small influence on the terminal, and has good backward compatibility and deployment feasibility. The scheme is enhanced on the existing protocol, the protocol is changed little, a new protocol process is not introduced, and the realization difficulty is low.
Fig. 4 shows a schematic diagram of an information transmission 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 a dynamic spectrum sharing cell according to a transmission association relationship between the first cell of the first base station and the second cell of the second base station, re-map PDSCH data of a physical downlink shared channel of the first cell to time-frequency resources allocated to reference signals of the second cell, add interference indication information on whether the time-frequency resources are multiplexed to resource configuration information of PDSCH data of the first cell, and transmit the resource configuration 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, which has a transmission association relationship with the first cell of the first base station, to the first base station after adding interference indication information on whether time-frequency resources are multiplexed.
The terminal 430 is configured to demodulate the multiplexed time-frequency resources using a successive interference cancellation technique based on the indication of the interference indication information whether the time-frequency resources transmitted by the first base station are multiplexed or not.
Fig. 5 shows 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 acquire resource configuration information of reference signals of all cells of the second base station;
a determining module 412 configured to determine that a first cell of the first base station and a second cell of the second base station are a pairing relationship of dynamic spectrum sharing cells according to a transmission association relationship of the first cell and the second cell;
a remapping module 413 configured to remap PDSCH data of the first cell to time-frequency resources of a reference signal allocated to the second cell;
a sending module 414, 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 resource configuration information to the terminal of the first cell, so that the terminal demodulates the multiplexed time-frequency resources by using the successive interference cancellation technique 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 terminal in the first cell through a broadcast message; or, the resource configuration information of the PDSCH data of the first cell added with the interference indication information is sent to a connected terminal in the first cell through RRC signaling.
And the reference signals of the second cell are mapped to corresponding time-frequency resources by the second base station, and the PDSCH data of the first cell are re-mapped to the time-frequency resources of the reference signals allocated to the second cell by the first base station, wherein the transmission power of the PDSCH data of the first cell is different from that of the reference signals of the second cell.
Fig. 6 shows a schematic diagram of a first base station of further 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 in any of the embodiments described above based on instructions stored in the memory 415.
For example, a first base station acquires resource configuration information of reference signals of all cells of a second base station; the first base station determines that a first cell and a second cell are a pairing relation of a dynamic spectrum sharing cell according to the transmission incidence relation of the first cell of the first base station and the second cell of the second base station; the first base station remaps 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 of whether the time-frequency resources are multiplexed to resource configuration information of PDSCH data of the first cell and sends the resource configuration 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, a system memory, a fixed nonvolatile storage medium, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), and other programs.
Some embodiments of the present disclosure propose 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.
As will be appreciated by one skilled in the art, 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 flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (14)
1. An information transmission method, comprising:
the method comprises the steps that a first base station acquires resource configuration information of reference signals of all cells of a second base station;
the first base station determines that a first cell and a second cell are a pairing relation of a dynamic spectrum sharing cell according to the transmission incidence relation of the first cell of the first base station and the second cell of the second base station;
the first base station remaps 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 of whether the time-frequency resources are multiplexed to resource configuration information of PDSCH data of the first cell and sends the resource configuration 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.
2. The method of claim 1,
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 of reference signals allocated to 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 resource configuration information of PDSCH data of the first cell to the terminal of the first cell comprises:
the first base station sends the resource configuration information of the PDSCH data of the first cell added with the interference indication information to an idle terminal in the first cell through a broadcast message; or the like, or, alternatively,
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 a connected terminal in the first cell through RRC signaling.
4. The method of claim 1,
the resource configuration information of the PDSCH data of the first cell, which is sent 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 following:
the identity of the first cell is determined,
downlink frequency point information of PDSCH data of the first cell,
the periodic configuration of the PDSCH data of the first cell comprises the following steps: time domain occupancy information indicating time domain symbols occupied by the PDSCH data of the first cell and frequency domain occupancy information indicating frequency domain subcarriers occupied by the PDSCH data of the first cell,
transmit power of PDSCH data of the first cell.
5. The method of claim 1, further comprising:
the first base station receives resource configuration information of a reference signal of a second cell sent by a second base station, wherein the resource configuration information comprises interference indication information whether time-frequency resources are multiplexed or not, and the interference indication information 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 an antenna port,
the periodic configuration of the reference signal of the second cell comprises: time domain occupancy information for a time domain symbol indicating occupancy of a reference signal by the second cell and frequency domain occupancy information for frequency domain subcarriers indicating occupancy of a reference signal by the second cell,
a transmit power of a reference signal of the second cell.
6. The method of claim 1,
the first base station acquires resource configuration 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 modes.
7. The method of claim 1, wherein the resource configuration information of the reference signals of all the cells of the second base station, acquired by the first base station, comprises:
the identity of the cell or cells is/are,
the information of the downlink frequency point of the cell,
a periodic configuration of a reference signal, comprising: time domain occupancy information indicating time domain symbols occupied by the reference signal and frequency domain occupancy information indicating frequency domain subcarriers occupied by the reference signal,
transmission power information of the reference signal.
8. The method of claim 1,
the first base station determines that a first cell of the first base station and a second cell of the second base station have a transmission incidence relation according to the pre-configuration information configured by the network management, and the existence of the transmission incidence relation indicates that the first cell and the second cell perform data receiving and sending operations through the same Radio Remote Unit (RRU) and the same antenna at the same time and in the same frequency.
9. The method of claim 1, wherein the terminal demodulating the multiplexed time-frequency resources by using a successive interference cancellation technique based on the indication of the interference indication information comprises:
and the terminal detects a signal with the maximum intensity from the received original signal through a pre-equalization detection algorithm under the condition that the time-frequency resource is determined to be multiplexed based on the indication of the interference indication information, demodulates and reconstructs the signal, judges whether the reconstructed signal is the PDSCH data of the required first cell or not, stops detection if the reconstructed signal is the PDSCH data of the required first cell, subtracts the reconstructed signal serving as interference from the original signal and starts the next detection if the reconstructed signal is not the PDSCH data of the required first cell, and circulates in such a way until the PDSCH data of the required first cell is detected.
10. The method of claim 9,
the pre-equalization detection algorithm comprises 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 transfer method of any of claims 1-8 based on instructions stored in the memory.
12. A base station, comprising:
a receiving module configured to acquire resource configuration information of reference signals of all cells of a second base station;
a determining module configured to determine that a first cell of a first base station and a second cell of a second base station are a pairing relation of dynamic spectrum sharing cells according to a transmission association relation of the first cell and the second cell;
a remapping module configured to remap Physical Downlink Shared Channel (PDSCH) data of a first cell to time-frequency resources of a reference signal allocated to a 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 resource configuration 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.
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 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 which has a transmission incidence relation with the first cell of the first base station to the first base station after adding interference indication information whether time-frequency resources are multiplexed or not,
the terminal is configured to demodulate the multiplexed time-frequency resources using a successive interference cancellation technique based on an indication of interference indication information whether the time-frequency resources are multiplexed or not transmitted by the first base station.
14. A non-transitory computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps of the information transmission method of any one of claims 1 to 10.
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