A communication method and base station

Abstract

The application provides a communication method and a base station, and belongs to the technical field of wireless communication, and the method comprises the following steps: performing at least one of the following according to resources and / or parameters associated with downlink scheduling of a second base station in a cross-interference time slot: uplink scheduling in the cross-interference time slot; uplink demodulation in the cross-interference time slot; and configuring an uplink demodulation reference signal. The application provides an interference cancellation method without a channel calibration process between a disturbing base station and a disturbed base station in a full-duplex system or other systems with cross-interference time slots, and the interference cancellation method also does not require the disturbing base station to exchange downlink data of the disturbing base station in the cross-interference time slot with the disturbed base station.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, and in particular to a communication method and a base station. BACKGROUND

[0002] In the existing Long Term Evolution (LTE) and 5G systems, uplink and downlink adopt a Time Division Duplexing (TDD) or a Frequency Division Duplexing (FDD) working mode. In some special deployment scenarios, such as in a time division working mode, different base stations adopt different frame structure configurations, and there may be a situation as shown in the following table, in which some base stations perform downlink transmission in some time slots, and adjacent base stations perform uplink reception. These time slots are referred to as cross-interference time slots. In these time slots, although each base station is in a state of either transmission or reception, the system is in a full-duplex working mode of simultaneous transmission and reception. In this scenario, for a base station that is in a receiving state, the uplink reception signal of the base station contains the interference signal of the downlink transmission of the adjacent base station, and therefore, the interference cancellation method needs to be considered for the base station that is in a receiving state. Figure 1 SUMMARY

[0003] Therefore, the present application provides a communication method and a base station to solve the problem that in some time slots, the downlink transmission signal of a downlink transmission base station interferes with the uplink reception of an uplink reception base station.

[0004] To solve the above technical problem, in a first aspect, the present application provides a communication method applied to a first base station, comprising:

[0005] According to the resources and / or parameters associated with the downlink scheduling of the second base station in the cross-interference time slots, at least one of the following is performed:

[0006] uplink scheduling in the cross-interference time slots;

[0007] uplink demodulation in the cross-interference time slots;

[0008] configuring an uplink demodulation reference signal.

[0009] Optionally, the parameters include generation parameters of a demodulation reference signal used by the second base station for downlink scheduling in the cross-interference time slots.

[0010] ​The method comprises: determining, according to resources and / or parameters associated with downlink scheduling of the second base station in the cross interference time slot, at least one of the following: uplink scheduling in the cross interference time slot; uplink demodulation in the cross interference time slot; configuring uplink demodulation reference signals, comprising:

[0011] configuring uplink demodulation reference signals for all terminals accessing the first base station, the configured uplink demodulation reference signals being orthogonal to downlink demodulation reference signals of the second base station, the downlink demodulation reference signals being determined according to the generated parameters.

[0012] Optionally, the method comprises: determining, according to resources and / or parameters associated with downlink scheduling of the second base station in the cross interference time slot, at least one of the following: uplink scheduling in the cross interference time slot; uplink demodulation in the cross interference time slot; configuring uplink demodulation reference signals, comprising:

[0013] determining, according to downlink scheduling resources of the second base station in the cross interference time slot, uplink scheduling terminals and / or uplink scheduling resources of the uplink scheduling terminals in the cross interference time slot.

[0014] Optionally, the method further comprises, before the step of determining, according to downlink scheduling resources of the second base station in the cross interference time slot, uplink scheduling terminals and / or uplink scheduling resources of the uplink scheduling terminals in the cross interference time slot:

[0015] obtaining, through an interface between the first base station and the second base station, information about the downlink scheduling resources of the second base station in the cross interference time slot.

[0016] Optionally, the step of determining, according to downlink scheduling resources of the second base station in the cross interference time slot, uplink scheduling terminals and / or uplink scheduling resources of the uplink scheduling terminals in the cross interference time slot comprises:

[0017] selecting uplink scheduling resources that are orthogonal to the downlink scheduling resources in the frequency domain as the uplink scheduling resources in the cross interference time slot.

[0018] Optionally, the step of determining, according to downlink scheduling resources of the second base station in the cross interference time slot, uplink scheduling terminals and / or uplink scheduling resources of the uplink scheduling terminals in the cross interference time slot further comprises:

[0019] selecting uplink scheduling resources that are the same as the downlink scheduling resources in the frequency domain as the uplink scheduling resources in the cross interference time slot.

[0020] selecting a first terminal as an uplink scheduling terminal for uplink scheduling in the cross interference time slot, wherein a correlation between an uplink channel of the first terminal and an equivalent channel from the second base station to the first base station is lower than a preset threshold, or the correlation between the uplink channel of the first terminal and the equivalent channel from the second base station to the first base station is the lowest among uplink terminals to be scheduled, and the equivalent channel from the second base station to the first base station is a channel from the second base station to the first base station detected by the first base station.

[0021] Optionally, the at least one of the following is performed according to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot: uplink scheduling in the cross interference time slot; uplink demodulation in the cross interference time slot; configuring an uplink demodulation reference signal, including:

[0022] uplink channel estimation using the uplink demodulation reference signal on the uplink scheduling resource, and demodulating a useful uplink received signal of the first base station.

[0023] Optionally, the at least one of the following is performed according to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot: uplink scheduling in the cross interference time slot; uplink demodulation in the cross interference time slot; configuring an uplink demodulation reference signal, including:

[0024] channel estimation of the equivalent channel from the second base station to the first base station using the downlink demodulation reference signal and channel estimation of the uplink channel of the first base station using the uplink demodulation reference signal on the same uplink scheduling resource as the downlink scheduling resource;

[0025] demodulating a downlink transmitted signal of the second base station and a useful uplink received signal of the first base station according to the equivalent channel from the second base station to the first base station and the uplink channel of the first base station using a joint detection algorithm.

[0026] In a second aspect, the present application further provides a communication method applied to a second base station, comprising:

[0027] sending, to a first base station, a resource and / or parameter associated with downlink scheduling of the second base station in a cross interference time slot.

[0028] In a third aspect, the present application further provides a first base station, comprising:

[0029] a communication module configured to perform at least one of the following according to a resource and / or parameter associated with downlink scheduling of a second base station in a cross interference time slot:

[0030] uplink scheduling in the cross interference time slot;

[0031] uplink demodulation in the cross interference time slot;

[0032] configuring uplink demodulation reference signals.

[0033] Optionally, the parameters comprise generation parameters of a demodulation reference signal used by the second base station for downlink scheduling in the cross interference time slot.

[0034] The communication module comprises:

[0035] a configuring unit, configured to configure all terminals accessing the first base station with uplink demodulation reference signals, the configured uplink demodulation reference signals being orthogonal to downlink demodulation reference signals of the second base station, the downlink demodulation reference signals being determined according to the generation parameters.

[0036] Optionally, the communication module comprises:

[0037] an uplink scheduling unit, configured to determine uplink scheduling terminals and / or uplink scheduling resources of the uplink scheduling terminals for uplink scheduling in the cross interference time slot according to downlink scheduling resources of the second base station in the cross interference time slot.

[0038] Optionally, the communication module further comprises:

[0039] an information interaction unit, configured to acquire information of downlink scheduling resources of the second base station in the cross interference time slot through an interface between the first base station and the second base station.

[0040] Optionally, the uplink scheduling unit is configured to select uplink scheduling resources orthogonal to the downlink scheduling resources in the frequency domain as the uplink scheduling resources in the cross interference time slot.

[0041] Optionally, the uplink scheduling unit is configured to select uplink scheduling resources identical to the downlink scheduling resources in the frequency domain as the uplink scheduling resources in the cross interference time slot; and select a first terminal as an uplink scheduling terminal for uplink scheduling in the cross interference time slot, the first terminal having an uplink channel with a correlation to an equivalent channel of the second base station to the first base station lower than a preset threshold, or having an uplink channel with a correlation to the equivalent channel of the second base station to the first base station lowest among uplink terminals to be scheduled, the equivalent channel of the second base station to the first base station being a channel of the second base station to the first base station detected by the first base station.

[0042] Optionally, the communication module comprises:

[0043] The first demodulation unit is configured to demodulate the useful uplink receiving signal of the first base station by using the uplink demodulation reference signal for uplink channel estimation on the uplink scheduling resource.

[0044] Optionally, the communication module comprises:

[0045] The channel estimation unit is configured to perform channel estimation on the equivalent channel from the second base station to the first base station by using the downlink demodulation reference signal and perform channel estimation on the uplink channel of the first base station by using the uplink demodulation reference signal on the same uplink scheduling resource as the downlink scheduling resource.

[0046] The second demodulation unit is configured to demodulate the downlink transmitting signal of the second base station and the useful uplink receiving signal of the first base station by using a joint detection algorithm according to the equivalent channel from the second base station to the first base station and the uplink channel of the first base station.

[0047] In a fourth aspect, the present application provides a second base station, comprising:

[0048] The sending module is configured to send the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot to the first base station.

[0049] In a fifth aspect, the present application provides a first base station, comprising a transceiver and a processor.

[0050] The transceiver is configured to perform at least one of the following according to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot:

[0051] The uplink scheduling in the cross interference time slot;

[0052] The uplink demodulation in the cross interference time slot;

[0053] The configuration of the uplink demodulation reference signal.

[0054] Optionally, the parameter comprises a generation parameter of the demodulation reference signal used by the second base station for the downlink scheduling in the cross interference time slot.

[0055] The transceiver is configured to configure the uplink demodulation reference signal for all terminals accessing the first base station, wherein the configured uplink demodulation reference signal is orthogonal to the downlink demodulation reference signal of the second base station, and the downlink demodulation reference signal is determined according to the generation parameter.

[0056] Optionally, the transceiver is configured to determine the uplink scheduling terminal and / or the uplink scheduling resource of the uplink scheduling terminal for the uplink scheduling in the cross interference time slot according to the downlink scheduling resource of the second base station in the cross interference time slot.

[0057] Optionally, the transceiver is configured to acquire information of downlink scheduling resources of the second base station in the cross interference time slot through an interface between the first base station and the second base station.

[0058] Optionally, the transceiver is configured to select uplink scheduling resources orthogonal to the downlink scheduling resources in the frequency domain as the uplink scheduling resources in the cross interference time slot.

[0059] Optionally, the transceiver is configured to select uplink scheduling resources identical to the downlink scheduling resources in the frequency domain as the uplink scheduling resources in the cross interference time slot; and select a first terminal as an uplink scheduling terminal for uplink scheduling in the cross interference time slot, wherein a correlation between an uplink channel of the first terminal and an equivalent channel of the second base station to the first base station is lower than a preset threshold, or the correlation between the uplink channel of the first terminal and the equivalent channel of the second base station to the first base station is the lowest among uplink terminals to be scheduled, and the equivalent channel of the second base station to the first base station is a channel of the second base station to the first base station detected by the first base station.

[0060] Optionally, the transceiver is configured to perform uplink channel estimation using the uplink demodulation reference signal on the uplink scheduling resources, and demodulate a useful uplink received signal of the first base station.

[0061] Optionally, the transceiver is configured to perform channel estimation of the equivalent channel of the second base station to the first base station using the downlink demodulation reference signal and channel estimation of the uplink channel of the first base station using the uplink demodulation reference signal on the uplink scheduling resources identical to the downlink scheduling resources in the frequency domain; and demodulate a downlink transmitted signal of the second base station and a useful uplink received signal of the first base station using a joint detection algorithm according to the equivalent channel of the second base station to the first base station and the uplink channel of the first base station.

[0062] In a sixth aspect, the present application provides a second base station, comprising a transceiver and a processor.

[0063] The transceiver is configured to send resources and / or parameters associated with downlink scheduling of the second base station in a cross interference time slot to a first base station.

[0064] In a seventh aspect, the present application provides a base station, comprising a memory, a processor, and a program stored in the memory and executable on the processor; and the processor implements the steps of any one of the above communication methods when executing the program.

[0065] In an eighth aspect, the present application provides a readable storage medium, which stores a program, and the program is executed by a processor to implement the steps of any one of the communication methods.

[0066] The beneficial effects of the above technical solutions of the present application are as follows:

[0067] The embodiments of the present application provide an interference cancellation method without channel calibration process between a disturbing base station and a disturbed base station in a full duplex system or other system with cross interference time slots, by scheduling uplink and / or demodulating uplink and / or configuring uplink demodulation reference signals according to the resources and / or parameters related to downlink scheduling of the second base station (i.e. the disturbing base station) in the cross interference time slots, so that the first base station can eliminate the interference caused by the downlink transmission signal of the second base station and demodulate the useful uplink signal. Moreover, the interference cancellation method provided by the embodiments of the present application also does not require the disturbing base station to interact with the disturbed base station the downlink transmission data of the disturbing base station in the cross interference time slots. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 A schematic diagram of cross interference between base stations;

[0069] Figure 2 A flowchart of a communication method in the first embodiment of the present application;

[0070] Figure 3 A flowchart of a communication method in the second embodiment of the present application;

[0071] Figure 4 A structural diagram of a first base station in the third embodiment of the present application;

[0072] Figure 5 A structural diagram of a second base station in the fourth embodiment of the present application;

[0073] Figure 6 A structural diagram of a first base station in the fifth embodiment of the present application;

[0074] Figure 7 A structural diagram of a second base station in the sixth embodiment of the present application;

[0075] Figure 8 A structural diagram of a first base station in the seventh embodiment of the present application;

[0076] Figure 9 A structural diagram of a second base station in the eighth embodiment of the present application. DETAILED DESCRIPTION

[0077] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0078] The interference cancellation method available in the full duplex system at present is that each base station transmits a calibration sequence known by each base station in a specific time slot (calibration time slot), and other base stations receive, and each base station obtains the channel information of the downlink interference signal of the adjacent station through the method:

[0079] (1) When a base station i receives the calibration sequence transmitted by a base station j in the calibration time slot at a receiving level higher than a certain level, the base station i can obtain the channel information Hij (i is the receiving base station and j is the transmitting base station); otherwise, it is considered that the base station j has no downlink transmission interference to the base station i.

[0080] (2) In the calibration time slot, different base stations transmit the calibration sequence in a predetermined order, and all other base stations receive, detect and estimate the channel. According to the channel measurement result in the calibration time slot, each base station maintains a list of Hij and continuously updates it according to the calibration result.

[0081] (3) In the cross interference time slot, the base station receiving the uplink signal removes Hij*Sj from the received signal according to Hij and the downlink signal Sj of the adjacent interfering base station, and obtains the useful signal of the uplink reception.

[0082] However, the interference cancellation method at present has the following problems:

[0083] (1) To complete one round of calibration, all base stations need to experience a process of "transmitting the calibration sequence in the calibration time slot and receiving multiple times", and the calibration time slot is generally arranged at a specific time of the 5ms frame structure, so that one round of Hij update needs N(N-1)*5ms / 2, N is the number of base stations involved in the cross time slot interference, and the longer the time for one round of calibration is, the larger the number of deployed sites is.

[0084] (2) When the calibration time is too long, the Hij used in the interference signal cancellation in the cross interference time slot is obtained at the last calibration time, which may have changed at present, resulting in inaccurate and incomplete interference cancellation.

[0085] (3) The calibration time slot occupies the normal transmission and reception time of the system, to a certain extent, reduces the data transmission time, and causes the loss of the uplink and downlink throughput of the system.

[0086] (4) In order to remove interference in the uplink received signal, different base stations need to exchange downlink transmit bits, and even exchange downlink in-phase / quadrature (IQ) data symbols Sj. This places very high demands on the transmission bandwidth of the Xn interface between base stations, which is difficult to implement in the industry. Therefore, this solution is mainly used between different radio units (RRUs) in the same baseband (Building Baseband Unit, BBU), and its application scenarios are somewhat limited.

[0087] Please see Figure 2 , Figure 2 This is a flowchart illustrating a communication method provided in Embodiment 1 of the present invention. The method is applied to a first base station and includes the following steps:

[0088] Step 21: Based on the resources and / or parameters associated with the downlink scheduling of the second base station within the cross-interference time slot, perform at least one of the following:

[0089] Uplink scheduling within the cross-interference time slot;

[0090] Uplink demodulation within the cross-interference time slot;

[0091] Configure the uplink demodulation reference signal (DMRS).

[0092] In this embodiment of the invention, by scheduling uplink and / or demodulating uplink and / or configuring uplink demodulation reference signals based on the resources and / or parameters related to downlink scheduling of the second base station (i.e., the interfering base station) within the cross-interference time slot, the first base station can eliminate the interference caused by the downlink transmission signal of the second base station and demodulate the useful uplink signal.

[0093] In other words, embodiments of the present invention provide an interference cancellation method in full-duplex systems or other systems with cross-interference time slots that does not require a channel calibration process between the interfering base station and the interfered base station. This overcomes the following problems of interference cancellation methods that require an inter-base station calibration process:

[0094] (1) The extremely high interface bandwidth requirements and equipment implementation complexity caused by the need to transmit downlink transmission bits and even IQ data symbols between the harassing base station and the harassed base station;

[0095] (2) The dedicated calibration time occupies part of the uplink and downlink service transmission time, resulting in a decrease in network service performance;

[0096] (3) The time interval between calibration and actual interference cancellation is too long, and the channel changes during the period, which leads to a decrease in the accuracy of interference cancellation.

[0097] The above communication method is illustrated below.

[0098] Optionally, the parameter comprises a generation parameter of a demodulation reference signal used by the second base station for downlink scheduling in the cross interference time slot.

[0099] The at least one of the following is performed according to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot: uplink scheduling in the cross interference time slot; uplink demodulation in the cross interference time slot; configuring an uplink demodulation reference signal, comprising:

[0100] The uplink demodulation reference signal is configured for all terminals accessing the first base station, and the configured uplink demodulation reference signal is orthogonal to the downlink demodulation reference signal of the second base station, which is determined according to the generation parameter.

[0101] Embodiments of the present application need to configure, according to the generation parameter of the demodulation reference signal used by the second base station (i.e. the interfering base station) for downlink scheduling in the cross interference time slot, an uplink demodulation reference signal orthogonal to the downlink demodulation reference signal determined according to the generation parameter for all terminals accessing the first base station (i.e. the interfered base station), to facilitate subsequent channel estimation of the interference channel (the equivalent channel from the second base station to the first base station) and / or the uplink receiving channel when demodulating the uplink receiving signal.

[0102] Specifically, the base station performing downlink transmission in the cross interference time slot, i.e. the second base station, transmits the generation parameter of the demodulation reference signal pilot used by the second base station for downlink scheduling in the cross interference time slot to the first base station when establishing the Xn connection between the base stations. That is, the first base station receives the generation parameter of the demodulation reference signal pilot used by the second base station for downlink scheduling in the cross interference time slot transmitted by the second base station through the Xn interface when starting up. Thus, the first base station can configure, according to the generation parameter, an uplink demodulation reference signal orthogonal to the downlink demodulation reference signal generated according to the generation parameter for all terminals accessing the first base station. Of course, if the generation parameter of the demodulation reference signal pilot used by the second base station for downlink scheduling in the cross interference time slot is updated subsequently, the second base station needs to transmit the updated generation parameter of the demodulation reference signal pilot used for downlink scheduling to the first base station through the Xn interface, and the first base station needs to reconfigure the uplink demodulation reference signal for all terminals accessing the first base station according to the updated generation parameter.

[0103] In addition, after receiving the generation parameter of the demodulation reference signal pilot used by the second base station for downlink scheduling, the first base station configures the uplink demodulation reference signal parameter for all terminals (UE) accessing the first base station through the radio resource control (RRC) signaling. That is, the first base station (the interfered base station) should configure the uplink demodulation reference signal parameter of the cell according to the demodulation reference signal pilot parameter used by the second base station (the interfering base station) for downlink scheduling. For example, the first base station can configure the uplink demodulation reference signal in the same symbol of the same time slot as the downlink demodulation reference signal of the second base station, and the first base station issues a different scrambling ID through signaling to ensure the orthogonality of the uplink demodulation reference signal of the first base station and the downlink demodulation reference signal of the second base station.

[0104] Optionally, the at least one of the following is performed according to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross-interference time slot: uplink scheduling in the cross-interference time slot; uplink demodulation in the cross-interference time slot; and configuration of an uplink demodulation reference signal, including:

[0105] The uplink scheduling terminal (or uplink scheduling user) and / or the uplink scheduling resource of the uplink scheduling terminal in the cross-interference time slot are determined according to the downlink scheduling resource of the second base station in the cross-interference time slot.

[0106] In addition, the first base station also needs to determine the uplink scheduling terminal and / or the uplink scheduling resource in the cross-interference time slot according to the to-be-transmitted data amount and / or uplink channel information (including uplink channel quality) of the uplink to-be-scheduled terminal.

[0107] The uplink channel information (including uplink channel quality) of each uplink to-be-scheduled terminal is obtained through the uplink channel sounding reference signal (SRS) sent by the terminal accessing the first base station.

[0108] Further optionally, before the uplink scheduling terminal and / or the uplink scheduling resource of the uplink scheduling terminal in the cross-interference time slot are determined according to the downlink scheduling resource of the second base station in the cross-interference time slot, the method further includes:

[0109] The information of the downlink scheduling resource of the second base station in the cross-interference time slot is obtained through the interface between the first base station and the second base station. The interface between the first base station and the second base station can be an Xn interface.

[0110] Specifically, if the first base station and the second base station are not co-baseband, the second base station sends the position index of the downlink scheduling resource (i.e. physical resource block (PRB)) used by the second base station for downlink scheduling in the cross interference time slot to the first base station through the Xn interface at an early preset time of the cross interference time slot. That is, the first base station receives the position index of the downlink scheduling resource used by the second base station for downlink scheduling in the cross interference time slot sent by the second base station at the early preset time of the cross interference time slot.

[0111] Unlike the interference cancellation method in the related art which brings about excessive interface bandwidth requirement and / or device implementation complexity due to the need to transmit downlink sending bits or even IQ data symbols, in the embodiment of the present application, only the information of the downlink scheduling resource of the second base station in the cross interference time slot (for example, the position index of the PRB resource used by the second base station for downlink in the cross interference time slot) needs to be exchanged between the base stations, which can be given in a bit map manner, or even fewer bits than the bit map manner, so the Xn interface bandwidth requirement is very low.

[0112] Of course, if the first base station and the second base station are co-baseband, the process of exchanging the information of the downlink scheduling resource of the second base station in the cross interference time slot through the Xn interface is not needed.

[0113] In one optional embodiment, the determining the uplink scheduling terminal and / or the uplink scheduling resource of the uplink scheduling terminal for uplink scheduling in the cross interference time slot according to the downlink scheduling resource of the second base station in the cross interference time slot comprises:

[0114] selecting the uplink scheduling resource orthogonal to the downlink scheduling resource in the frequency domain as the uplink scheduling resource in the cross interference time slot. That is, the uplink scheduling PRB resource orthogonal to the downlink scheduling PRB resource of the second base station (the interfering base station) in the frequency domain is selected for scheduling in the cross interference time slot.

[0115] In the embodiment of the present application, the uplink resource scheduling is performed in the cross interference time slot in a frequency division manner with the downlink scheduling resource, so that the downlink sending signal of the second base station and the (useful) uplink receiving signal of the first base station can be demodulated respectively.

[0116] In another optional embodiment, the determining the uplink scheduling terminal and / or the uplink scheduling resource of the uplink scheduling terminal for uplink scheduling in the cross interference time slot according to the downlink scheduling resource of the second base station in the cross interference time slot further comprises:

[0117] selecting an uplink scheduling resource same as the downlink scheduling resource in frequency domain as the uplink scheduling resource in the cross interference time slot; that is, selecting an uplink scheduling PRB resource same as the downlink scheduling PRB resource of the second base station (interfering base station) in frequency domain for scheduling in the cross interference time slot.

[0118] selecting a first terminal as an uplink scheduling terminal in the cross interference time slot, the uplink channel of the first terminal having a correlation with an equivalent channel from the second base station to the first base station lower than a preset threshold or being the lowest among the uplink channels of the uplink scheduling terminals, the equivalent channel from the second base station to the first base station being a channel from the second base station to the first base station detected by the first base station. The equivalent channel is not necessarily the actual channel from the second base station to the first base station.

[0119] In the embodiment of the present application, the uplink terminals to be scheduled are scheduled in the cross interference time slot in a manner of spatial division from the second base station, so that the useful uplink receiving signal of the first base station can be demodulated by using a demodulation mode related to spatial division scheduling.

[0120] Specifically, if the first base station has previously obtained the information of the equivalent channel from the second base station to the first base station, for example, has completed transmission in the previous cross interference time slot, the terminal whose uplink channel has a correlation with the equivalent channel from the second base station to the first base station lower than a certain threshold is selected for uplink scheduling in the cross interference time slot, or the terminal whose uplink channel has the lowest correlation with the equivalent channel from the second base station to the first base station among the uplink terminals to be scheduled is selected for uplink scheduling in the cross interference time slot. If the first base station has not previously obtained the information of the equivalent channel from the second base station to the first base station, any uplink terminal to be scheduled is selected for uplink scheduling in the cross interference time slot.

[0121] In addition, the above-mentioned manner of selecting the uplink scheduling resource orthogonal to the frequency domain of the downlink scheduling resource and the manner of selecting the uplink scheduling resource identical to the frequency domain of the downlink scheduling resource can exist simultaneously. Specifically, first, the uplink channel information of each uplink terminal to be scheduled is acquired, then the correlation of the uplink channel of each uplink terminal to be scheduled to the first base station and the equivalent channel of the second base station to the first base station is calculated respectively, and finally, the terminal with high correlation of the uplink channel to the equivalent channel of the second base station to the first base station is selected from the uplink terminals to be scheduled for frequency division scheduling until the frequency domain resources in the cross interference time slot are occupied, and the terminal with low correlation of the uplink channel to the equivalent channel of the second base station to the first base station is selected from the remaining uplink terminals to be scheduled for spatial division scheduling. For example, after the correlation of the uplink channel of each uplink terminal to be scheduled to the first base station and the equivalent channel of the second base station to the first base station is calculated, the uplink terminals to be scheduled are sorted in order from high to low according to the channel correlation, and the uplink terminals to be scheduled are selected in order for frequency division scheduling with the second base station in the cross interference time slot until the frequency domain resources in the cross interference time slot are fully occupied, and then the uplink terminals to be scheduled are selected in order from low to high according to the channel correlation for spatial division scheduling with the second base station.

[0122] The first base station will configure the uplink demodulation reference signal of all terminals accessing the first base station according to the resources and / or parameters related to the downlink scheduling of the second base station in the cross interference time slot before the cross interference time slot, and select the terminals and / or resources for uplink scheduling in the cross interference time slot. Then, in the cross interference time slot, the second base station (i.e. the interfering base station) performs downlink scheduling according to the downlink scheduling resources in the cross interference time slot and the demodulation reference signal generated according to the generated parameters; the terminals selected for uplink scheduling in the cross interference time slot perform uplink scheduling according to the uplink demodulation reference signal and the uplink scheduling resources configured by the first base station; and the first base station performs uplink reception in the cross interference time slot.

[0123] Optionally, the at least one of the following is performed according to the resources and / or parameters associated with the downlink scheduling of the second base station in the cross interference time slot: uplink scheduling in the cross interference time slot; uplink demodulation in the cross interference time slot; and configuration of the uplink demodulation reference signal, including:

[0124] The uplink channel estimation is performed on the uplink scheduling resource using the uplink demodulation reference signal, and the useful uplink reception signal of the first base station is demodulated.

[0125] If the first base station selects the uplink scheduling resource orthogonal to the downlink scheduling resource of the second base station as the uplink scheduling resource in the cross interference time slot, the first base station can use the downlink demodulation reference signal of the second base station on the downlink scheduling resource to perform the equivalent channel estimation from the second base station to the first base station, use the uplink demodulation reference signal on the uplink scheduling resource to perform the uplink channel estimation from the terminal to the first base station, and demodulate the downlink sending signal S1 (interference signal) of the second base station and the uplink receiving signal S2 (useful signal) of the first base station after equalization. Of course, the first base station can also use the uplink demodulation reference signal on the uplink scheduling resource to perform the uplink channel estimation from the terminal to the first base station, and demodulate the uplink receiving signal S2 (useful signal) of the first base station.

[0126] Optionally, the uplink scheduling in the cross interference time slot is performed according to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot; the uplink demodulation in the cross interference time slot is performed according to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot; and the uplink demodulation reference signal is configured according to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot, including:

[0127] The channel estimation of the equivalent channel from the second base station to the first base station is performed on the same uplink scheduling resource as the downlink scheduling resource using the downlink demodulation reference signal, and the channel estimation of the uplink channel of the first base station is performed using the uplink demodulation reference signal.

[0128] The downlink sending signal of the second base station and the useful uplink receiving signal of the first base station are demodulated according to the equivalent channel from the second base station to the first base station and the uplink channel of the first base station using a joint detection algorithm.

[0129] If the first base station selects the uplink scheduling resource same as the downlink scheduling resource of the second base station as the uplink scheduling resource in the cross interference time slot, the first base station can use the downlink demodulation reference signal of the second base station and the uplink receiving demodulation reference signal of the first base station on the same PRB to perform channel estimation, and obtain the equivalent channel H1' from the second base station to the first base station and the channel H2 experienced by the uplink receiving of the first base station.

[0130] After obtaining the equivalent channel H1' from the second base station to the first base station and the channel H2 experienced by the uplink receiving of the first base station, the first base station can demodulate the downlink sending signal S1 (interference signal) of the second base station and the uplink receiving signal S2 (useful signal) of the first base station using a joint detection algorithm.

[0131] Specifically, the first base station uses the receiver G to perform uplink receiving and interference cancellation on the uplink signal y received by the first base station in the cross interference time slot:

[0132] Gy=G(H1'S1+H2S2+n);

[0133] wherein,

[0134] G=(H H H) -1 H H .

[0135] In the embodiment of the present application, when the first base station demodulates the uplink received signal S2 (useful signal), the receiver G can demodulate the downlink transmitted signal S1 (interference signal) of the second base station and the uplink received signal S2 (useful signal) of the first base station at the same time. Moreover, the lower the correlation between the uplink scheduling terminal uplink channel H2 and the equivalent channel H1' from the second base station to the first base station, that is, the better the orthogonality between H1' and H2, the better the effect of demodulating S1 and S2 through the receiver G (that is, the higher the post-SINR).

[0136] The specific joint detection algorithm can refer to the joint detection algorithm used in the space division multiplexing demodulation in the related art, which will not be described in detail here.

[0137] Please refer to Figure 3 , Figure 3 A flowchart of a communication method provided by the second embodiment of the present application is shown in the figure. The method is applied to the second base station and includes the following steps:

[0138] Step 31: sending the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot to the first base station.

[0139] In the embodiment of the present application, the second base station is a base station that has cross interference with the first base station, and the downlink signal of the second base station interferes with the uplink reception of the first base station. Therefore, the second base station sends the resource and / or parameter associated with the downlink scheduling in the cross interference time slot to the first base station, so that the first base station can eliminate the interference caused by the downlink transmitted signal of the second base station according to the resource and / or parameter and demodulate the useful uplink signal.

[0140] Optionally, the parameters comprise generation parameters of demodulation reference signals used by the second base station for downlink scheduling in the cross interference time slot. Specifically, the second base station, when establishing the Xn connection between the first base station, sends the generation parameters of the demodulation reference signal pilots used by the second base station for downlink scheduling in the cross interference time slot to the first base station. Thus, the first base station can configure the uplink demodulation reference signals orthogonal to the downlink demodulation reference signals generated according to the generation parameters for all terminals accessing the first base station. Of course, if the generation parameters of the demodulation reference signal pilots used by the second base station for downlink scheduling in the cross interference time slot are updated subsequently, the second base station needs to send the updated generation parameters of the demodulation reference signal pilots used by the second base station for downlink scheduling in the cross interference time slot to the first base station through the Xn interface, and the first base station needs to reconfigure the uplink demodulation reference signals for all terminals accessing the first base station according to the updated generation parameters.

[0141] In other words, the sending, to the first base station, of the resources and / or parameters associated with the downlink scheduling of the second base station in the cross interference time slot comprises:

[0142] sending, to the first base station, generation parameters of demodulation reference signals used by the second base station for downlink scheduling in the cross interference time slot.

[0143] Optionally, if the first base station and the second base station do not share a baseband, the second base station sends, to the first base station through the Xn interface, a position index of downlink scheduling resources (i.e. physical resource blocks) used by the second base station for downlink scheduling in the cross interference time slot at a preset time in advance of the cross interference time slot.

[0144] Please refer to Figure 4 , Figure 4 is a structural schematic diagram of a first base station provided by Embodiment Three of the present application, and the first base station 40 comprises:

[0145] a communication module 41, configured to perform at least one of the following according to resources and / or parameters associated with the downlink scheduling of the second base station in the cross interference time slot:

[0146] uplink scheduling in the cross interference time slot;

[0147] uplink demodulation in the cross interference time slot;

[0148] configuring uplink demodulation reference signals.

[0149] Optionally, the parameters comprise generation parameters of demodulation reference signals used by the second base station for downlink scheduling in the cross interference time slot;

[0150] the communication module 41 comprises:

[0151] The configuration unit is configured to configure uplink demodulation reference signals for all terminals accessing the first base station, and the configured uplink demodulation reference signals are orthogonal to downlink demodulation reference signals of the second base station, and the downlink demodulation reference signals are determined according to the generated parameters.

[0152] Optionally, the communication module 41 comprises:

[0153] The uplink scheduling unit is configured to determine uplink scheduling terminals and / or uplink scheduling resources of the uplink scheduling terminals in the cross interference time slot according to downlink scheduling resources of the second base station in the cross interference time slot.

[0154] Optionally, the communication module 41 further comprises:

[0155] The information interaction unit is configured to acquire information of the downlink scheduling resources of the second base station in the cross interference time slot through an interface between the first base station and the second base station.

[0156] Optionally, the uplink scheduling unit is configured to select uplink scheduling resources orthogonal to the downlink scheduling resources in the frequency domain as the uplink scheduling resources in the cross interference time slot.

[0157] Optionally, the uplink scheduling unit is configured to select uplink scheduling resources identical to the downlink scheduling resources in the frequency domain as the uplink scheduling resources in the cross interference time slot, and select a first terminal as an uplink scheduling terminal in the cross interference time slot, wherein a correlation between an uplink channel of the first terminal and an equivalent channel of the second base station to the first base station is lower than a preset threshold, or the correlation between the uplink channel of the first terminal and the equivalent channel of the second base station to the first base station is the lowest among uplink terminals to be scheduled, and the equivalent channel of the second base station to the first base station is a channel of the second base station to the first base station detected by the first base station.

[0158] Optionally, the communication module 41 comprises:

[0159] The first demodulation unit is configured to demodulate useful uplink received signals of the first base station by utilizing the uplink demodulation reference signals for uplink channel estimation on the uplink scheduling resources.

[0160] Optionally, the communication module 41 comprises:

[0161] The channel estimation unit is configured to utilize the downlink demodulation reference signals for channel estimation of the equivalent channel of the second base station to the first base station, and utilize the uplink demodulation reference signals for channel estimation of the uplink channel of the first base station on the uplink scheduling resources identical to the downlink scheduling resources.

[0162] The second demodulation unit is configured to demodulate the downlink transmission signal of the second base station and the useful uplink reception signal of the first base station according to the equivalent channel from the second base station to the first base station and the uplink channel of the first base station by using a joint detection algorithm.

[0163] The product embodiment of the present application corresponds to the method embodiment I, and thus will not be described here again. For details, please refer to the above embodiment I.

[0164] Please refer to Figure 5 , Figure 5 is a structural schematic diagram of a second base station provided by the embodiment four of the present application. The second base station 50 comprises:

[0165] The sending module 51 is configured to send, to a first base station, resources and / or parameters associated with downlink scheduling of the second base station in a cross-interference time slot.

[0166] The product embodiment of the present application corresponds to the method embodiment II, and thus will not be described here again. For details, please refer to the above embodiment II.

[0167] Please refer to Figure 6 , Figure 6 is a structural schematic diagram of a first base station provided by the embodiment five of the present application. The first base station 60 comprises a transceiver 61 and a processor 62.

[0168] The transceiver 61 is configured to perform at least one of the following according to resources and / or parameters associated with downlink scheduling of a second base station in a cross-interference time slot:

[0169] uplink scheduling in the cross-interference time slot;

[0170] uplink demodulation in the cross-interference time slot;

[0171] configuring uplink demodulation reference signals.

[0172] Optionally, the parameters comprise generation parameters of demodulation reference signals used by the second base station for downlink scheduling in the cross-interference time slot.

[0173] The transceiver 61 is configured to configure uplink demodulation reference signals for all terminals accessing the first base station. The configured uplink demodulation reference signals are orthogonal to downlink demodulation reference signals of the second base station, and the downlink demodulation reference signals are determined according to the generation parameters.

[0174] Optionally, the transceiver 61 is configured to determine uplink scheduling terminals and / or uplink scheduling resources of the uplink scheduling terminals for uplink scheduling in the cross-interference time slot according to downlink scheduling resources of the second base station in the cross-interference time slot.

[0175] Optionally, the transceiver 61 is configured to acquire information of downlink scheduling resources of the second base station in the cross interference time slot through an interface between the first base station and the second base station.

[0176] Optionally, the transceiver 61 is configured to select uplink scheduling resources orthogonal to the downlink scheduling resources in the frequency domain as the uplink scheduling resources in the cross interference time slot.

[0177] Optionally, the transceiver 61 is configured to select uplink scheduling resources identical to the downlink scheduling resources in the frequency domain as the uplink scheduling resources in the cross interference time slot, and select a first terminal as an uplink scheduling terminal for uplink scheduling in the cross interference time slot, where a correlation between an uplink channel of the first terminal and an equivalent channel from the second base station to the first base station is lower than a preset threshold, or the correlation between the uplink channel of the first terminal and the equivalent channel from the second base station to the first base station is the lowest among uplink terminals to be scheduled, and the equivalent channel from the second base station to the first base station is a channel from the second base station to the first base station detected by the first base station.

[0178] Optionally, the transceiver 61 is configured to perform uplink channel estimation on the uplink scheduling resources by using the uplink demodulation reference signal, and demodulate a useful uplink received signal of the first base station.

[0179] Optionally, the transceiver 61 is configured to perform channel estimation on the equivalent channel from the second base station to the first base station by using the downlink demodulation reference signal, and perform channel estimation on the uplink channel of the first base station by using the uplink demodulation reference signal on the uplink scheduling resources identical to the downlink scheduling resources in the frequency domain, and demodulate a downlink transmitted signal of the second base station and a useful uplink received signal of the first base station by using a joint detection algorithm according to the equivalent channel from the second base station to the first base station and the uplink channel of the first base station.

[0180] The embodiment of the application is a product corresponding to the above-mentioned method embodiment, and thus will not be described here again. For details, please refer to the above-mentioned embodiment one.

[0181] Please refer to Figure 7 , Figure 7 is a structural schematic diagram of a second base station provided in the embodiment six, and the second base station 70 comprises a transceiver 71 and a processor 72.

[0182] The transceiver 71 is configured to send resources and / or parameters associated with downlink scheduling of the second base station in a cross interference time slot to a first base station.

[0183] The embodiment of the present application is the product corresponding to the method embodiment two, and thus will not be described here again. Please refer to the embodiment two.

[0184] Please refer to Figure 8 , Figure 8 is a structural schematic diagram of a first base station provided by the embodiment seven of the present application. The first base station 80 comprises a processor 81, a memory 82, and a program stored in the memory 82 and capable of running on the processor 81; the processor 81 implements the following steps when executing the program:

[0185] According to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot, at least one of the following is performed:

[0186] uplink scheduling in the cross interference time slot;

[0187] uplink demodulation in the cross interference time slot;

[0188] configuring uplink demodulation reference signals.

[0189] Optionally, the parameter comprises a generation parameter of a demodulation reference signal used by the second base station for downlink scheduling in the cross interference time slot; the processor 81 can further implement the following steps when executing the program:

[0190] According to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot, at least one of the following is performed: uplink scheduling in the cross interference time slot; uplink demodulation in the cross interference time slot; configuring uplink demodulation reference signals, comprising:

[0191] configuring uplink demodulation reference signals for all terminals accessing the first base station, the configured uplink demodulation reference signals being orthogonal to downlink demodulation reference signals of the second base station, the downlink demodulation reference signals being determined according to the generation parameter.

[0192] Optionally, the processor 81 can further implement the following steps when executing the program:

[0193] According to the resource and / or parameter associated with the downlink scheduling of the second base station in the cross interference time slot, at least one of the following is performed: uplink scheduling in the cross interference time slot; uplink demodulation in the cross interference time slot; configuring uplink demodulation reference signals, comprising:

[0194] determining, according to the downlink scheduling resource of the second base station in the cross interference time slot, an uplink scheduling terminal and / or an uplink scheduling resource of the uplink scheduling terminal for uplink scheduling in the cross interference time slot.

[0195] Optionally, the processor 81, when executing the program, can further implement the following steps:

[0196] Before determining the uplink scheduling terminal and / or the uplink scheduling resource of the uplink scheduling terminal for uplink scheduling in the cross interference time slot according to the downlink scheduling resource of the second base station in the cross interference time slot, the method further comprises:

[0197] Obtaining information of the downlink scheduling resource of the second base station in the cross interference time slot through an interface between the first base station and the second base station.

[0198] Optionally, the processor 81, when executing the program, can further implement the following steps:

[0199] The step of determining the uplink scheduling terminal and / or the uplink scheduling resource of the uplink scheduling terminal for uplink scheduling in the cross interference time slot according to the downlink scheduling resource of the second base station in the cross interference time slot comprises:

[0200] Selecting an uplink scheduling resource orthogonal to the downlink scheduling resource in the frequency domain as the uplink scheduling resource in the cross interference time slot.

[0201] Optionally, the processor 81, when executing the program, can further implement the following steps:

[0202] The step of determining the uplink scheduling terminal and / or the uplink scheduling resource of the uplink scheduling terminal for uplink scheduling in the cross interference time slot according to the downlink scheduling resource of the second base station in the cross interference time slot further comprises:

[0203] Selecting an uplink scheduling resource identical to the downlink scheduling resource in the frequency domain as the uplink scheduling resource in the cross interference time slot.

[0204] Selecting a first terminal as the uplink scheduling terminal for uplink scheduling in the cross interference time slot, the uplink channel of the first terminal having a correlation with an equivalent channel of the second base station to the first base station lower than a preset threshold, or the uplink channel of the first terminal having a correlation with the equivalent channel of the second base station to the first base station being the lowest among uplink terminals to be scheduled, the equivalent channel of the second base station to the first base station being a channel of the second base station to the first base station detected by the first base station.

[0205] Optionally, the processor 81, when executing the program, can further implement the following steps:

[0206] The processor 81, when executing the program, implements the following steps:

[0207] The uplink channel estimation is performed on the uplink scheduling resource by using the uplink demodulation reference signal, and the useful uplink receiving signal of the first base station is demodulated.

[0208] Optionally, the processor 81, when executing the program, can also implement the following steps:

[0209] The processor 81, when executing the program, implements the following steps:

[0210] The channel estimation of the equivalent channel from the second base station to the first base station is performed on the same uplink scheduling resource as the downlink scheduling resource by using the downlink demodulation reference signal, and the channel estimation of the uplink channel of the first base station is performed by using the uplink demodulation reference signal;

[0211] The demodulation of the downlink sending signal of the second base station and the useful uplink receiving signal of the first base station is performed according to the equivalent channel from the second base station to the first base station and the uplink channel of the first base station by using a joint detection algorithm.

[0212] The specific working process of the embodiment of the application is consistent with that of the above-mentioned method embodiment one, and thus will not be described here again. For details, please refer to the description of the method steps in the above-mentioned embodiment one.

[0213] Please refer to Figure 9 , Figure 9 The second base station 90 provided by the embodiment eight of the application comprises a processor 91, a memory 92, and a program stored in the memory 92 and executable on the processor 91; the processor 91, when executing the program, implements the following steps:

[0214] The processor 91, when executing the program, implements the following steps:

[0215] The specific working process of the embodiment of the application is consistent with that of the above-mentioned method embodiment two, and thus will not be described here again. For details, please refer to the description of the method steps in the above-mentioned embodiment two.

[0216] Embodiment nine of the present application provides a readable storage medium, which stores a program, and the program is executed by a processor to implement the steps of the communication method in any one of the above-mentioned embodiment one or embodiment two. For details, please refer to the above description of the method steps in the corresponding embodiment.

[0217] The base station in the embodiment of the present application can be a base station (BTS) in a Global System of Mobile communication (GSM) or a Code Division Multiple Access (CDMA), can also be a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA), can also be an evolved base station (eNB or eNodeB) in LTE, or a relay station or an access point, or a base station in a future 5G network, etc., which is not limited here.

[0218] The terminal in the embodiments of the present application can be a wireless terminal or a wired terminal. The wireless terminal can be a device that provides voice and / or other service data connectivity to a user, a hand-held device having wireless connection function, or other processing device connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (RAN). The wireless terminal can be a mobile terminal, such as a mobile telephone (also known as a "cellular" phone) and a computer with a mobile termination, for example, a portable, pocket, hand-held, computer-embedded or car-mounted mobile apparatus that exchanges language and / or data with a radio access network. For example, the wireless terminal can be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and the like. The wireless terminal can also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, an access terminal, a user terminal, a user agent, a terminal, or a user equipment, without limitation.

[0219] The readable storage medium described above includes a computer readable storage medium. The computer readable storage medium includes permanent and non-permanent, removable and non-removable media, which can store information by any method or technology. The information can be computer readable instructions, data structures, program modules or other data. Examples of storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage device, or any other non-transmission medium that can be used to store information accessible by a computing device.

[0220] The above is the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles described in the present application, can also be made several improvements and refinements, these improvements and refinements should also be considered the scope of protection of the present application.

Claims

1. A communication method applied to a first base station, characterized in that, include: Based on the resources and / or parameters associated with the downlink scheduling of the second base station within the cross-interference time slot, perform at least one of the following: Uplink scheduling within the cross-interference time slot; Uplink demodulation within the cross-interference time slot; Configure the uplink demodulation reference signal; The parameters include the generation parameters of the demodulation reference signal used by the second base station for downlink scheduling in the cross-interference time slot; Based on the resources and / or parameters associated with the downlink scheduling of the second base station within the cross-interference time slot, perform at least one of the following: uplink scheduling within the cross-interference time slot; uplink demodulation within the cross-interference time slot; Configure the uplink demodulation reference signal, including: An uplink demodulation reference signal is configured for all terminals accessing the first base station. The configured uplink demodulation reference signal is orthogonal to the downlink demodulation reference signal of the second base station. The downlink demodulation reference signal is determined based on the generated parameters. The step of performing at least one of the following based on the resources and / or parameters associated with the downlink scheduling of the second base station within the cross-interference time slot: uplink scheduling within the cross-interference time slot; uplink demodulation within the cross-interference time slot; and configuring an uplink demodulation reference signal, including: Based on the downlink scheduling resources of the second base station in the cross-interference time slot, determine the uplink scheduling terminal and / or the uplink scheduling resources of the uplink scheduling terminal that perform uplink scheduling in the cross-interference time slot.

2. The method according to claim 1, characterized in that, Before determining the uplink scheduling terminal and / or the uplink scheduling resources of the uplink scheduling terminal in the cross-interference time slot based on the downlink scheduling resources of the second base station in the cross-interference time slot, the method further includes: Information on downlink scheduling resources of the second base station in the cross-interference time slot is obtained through the interface between the first base station and the second base station.

3. The method according to claim 1, characterized in that, The step of determining the uplink scheduling terminal and / or the uplink scheduling resources of the uplink scheduling terminal to perform uplink scheduling in the cross-interference time slot based on the downlink scheduling resources of the second base station in the cross-interference time slot includes: Select an uplink scheduling resource that is orthogonal to the frequency domain of the downlink scheduling resource as the uplink scheduling resource within the cross-interference time slot.

4. The method according to claim 1, characterized in that, The step of determining the uplink scheduling terminal and / or the uplink scheduling resources of the uplink scheduling terminal to perform uplink scheduling in the cross-interference time slot based on the downlink scheduling resources of the second base station in the cross-interference time slot further includes: Select an uplink scheduling resource with the same frequency domain as the downlink scheduling resource as the uplink scheduling resource in the cross-interference time slot; The first terminal is selected as the uplink scheduling terminal for uplink scheduling within the cross-interference time slot. The correlation between the uplink channel of the first terminal and the equivalent channel from the second base station to the first base station is lower than a preset threshold, or the correlation between the uplink channel of the first terminal and the equivalent channel from the second base station to the first base station is the lowest among the uplink scheduling terminals. The equivalent channel from the second base station to the first base station is the channel from the second base station to the first base station detected by the first base station.

5. The method according to claim 3, characterized in that, Based on the resources and / or parameters associated with the downlink scheduling of the second base station within the cross-interference time slot, perform at least one of the following: uplink scheduling within the cross-interference time slot; uplink demodulation within the cross-interference time slot; Configure the uplink demodulation reference signal, including: Uplink channel estimation is performed using the uplink demodulation reference signal on the uplink scheduling resources to demodulate the useful uplink received signal of the first base station.

6. The method according to claim 4, characterized in that, Based on the resources and / or parameters associated with the downlink scheduling of the second base station within the cross-interference time slot, perform at least one of the following: uplink scheduling within the cross-interference time slot; uplink demodulation within the cross-interference time slot; Configure the uplink demodulation reference signal, including: On the uplink scheduling resources that are the same as the downlink scheduling resources, channel estimation of the equivalent channel from the second base station to the first base station is performed using the downlink demodulation reference signal, and channel estimation of the uplink channel of the first base station is performed using the uplink demodulation reference signal. A joint detection algorithm is used to demodulate the downlink transmission signal of the second base station and the useful uplink reception signal of the first base station based on the equivalent channel from the second base station to the first base station and the uplink channel of the first base station.

7. A communication method applied to a second base station, characterized in that, include: Send to the first base station according to any one of claims 1 to 6 the resources and / or parameters associated with the downlink scheduling of the second base station in the cross-interference time slot.

8. A first base station, characterized in that, include: The communication module is configured to perform at least one of the following based on resources and / or parameters associated with downlink scheduling with the second base station within a cross-interference time slot: Uplink scheduling within the cross-interference time slot; Uplink demodulation within the cross-interference time slot; Configure the uplink demodulation reference signal; The parameters include the generation parameters of the demodulation reference signal used by the second base station for downlink scheduling in the cross-interference time slot; Based on the resources and / or parameters associated with the downlink scheduling of the second base station within the cross-interference time slot, perform at least one of the following: uplink scheduling within the cross-interference time slot; uplink demodulation within the cross-interference time slot; Configure the uplink demodulation reference signal, including: An uplink demodulation reference signal is configured for all terminals accessing the first base station. The configured uplink demodulation reference signal is orthogonal to the downlink demodulation reference signal of the second base station. The downlink demodulation reference signal is determined based on the generated parameters. The step of performing at least one of the following based on the resources and / or parameters associated with the downlink scheduling of the second base station within the cross-interference time slot: uplink scheduling within the cross-interference time slot; uplink demodulation within the cross-interference time slot; and configuring an uplink demodulation reference signal, including: Based on the downlink scheduling resources of the second base station in the cross-interference time slot, determine the uplink scheduling terminal and / or the uplink scheduling resources of the uplink scheduling terminal that perform uplink scheduling in the cross-interference time slot.

9. A second base station, characterized in that, include: The transmitting module is configured to transmit to the first base station according to any one of claims 1 to 6 the resources and / or parameters associated with the downlink scheduling of the second base station in the cross-interference time slot.

10. A first base station, characterized in that, include: Transceiver and processor; The transceiver is configured to perform at least one of the following based on resources and / or parameters associated with downlink scheduling of the second base station within cross-interference time slots: Uplink scheduling within the cross-interference time slot; Uplink demodulation within the cross-interference time slot; Configure the uplink demodulation reference signal; The parameters include the generation parameters of the demodulation reference signal used by the second base station for downlink scheduling in the cross-interference time slot; Based on the resources and / or parameters associated with the downlink scheduling of the second base station within the cross-interference time slot, perform at least one of the following: uplink scheduling within the cross-interference time slot; uplink demodulation within the cross-interference time slot; Configure the uplink demodulation reference signal, including: An uplink demodulation reference signal is configured for all terminals accessing the first base station. The configured uplink demodulation reference signal is orthogonal to the downlink demodulation reference signal of the second base station. The downlink demodulation reference signal is determined based on the generated parameters. The step of performing at least one of the following based on the resources and / or parameters associated with the downlink scheduling of the second base station within the cross-interference time slot: uplink scheduling within the cross-interference time slot; uplink demodulation within the cross-interference time slot; and configuring an uplink demodulation reference signal, including: Based on the downlink scheduling resources of the second base station in the cross-interference time slot, determine the uplink scheduling terminal and / or the uplink scheduling resources of the uplink scheduling terminal that perform uplink scheduling in the cross-interference time slot.

11. A second base station, characterized in that, include: Transceiver and processor; The transceiver is configured to send to the first base station according to any one of claims 1 to 6 resources and / or parameters associated with the downlink scheduling of the second base station in the cross-interference time slot.

12. A base station, comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that, When the processor executes the program, it implements the steps of the communication method as described in any one of claims 1 to 7.

13. A readable storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the communication method as described in any one of claims 1 to 7.

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