Method and apparatus for mitigating inter-cell interference in wireless communication system

Abstract

A method of operating an electronic device and an electronic device are provided. The method comprises: receiving data blank information from a serving cell; identifying at least one first subframe in which resource allocations between the serving cell and the interfering cell overlap and at least one second subframe in which resource allocations do not overlap based on the timing deviation and the data blank information; increasing a first weight for a first log-likelihood ratio (LLR) corresponding to the at least one first subframe; reducing a second weight for a second LLR corresponding to the at least one second subframe; and calculating a third LLR based on the first LLR and the second LLR.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on and claims the benefit of priority from Korean Patent Application No. 10-2024-0017541, filed on February 5, 2024, and Korean Patent Application No. 10-2024-0094608, filed on July 17, 2024, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein in their entirety by reference. Technical Field

[0003] The present inventive concept relates to a wireless communication system, and more particularly, to a method and apparatus for mitigating inter-cell interference in a wireless communication system. Background Art

[0004] As a next-generation mobile communication system, satellite communication systems are being researched and developed to overcome the coverage limitations of existing terrestrial networks. Satellite communication systems are expected to provide users with lower-capacity data, voice, and video streaming services via satellite in areas where service provision via existing terrestrial networks is difficult.

[0005] While satellite communication systems offer wider coverage, they are also susceptible to interference signals due to their weaker signal strength. Specifically, when terrestrial network (TN) cells and non-terrestrial network (NTN) cells overlap, more interference occurs between the NTN and TN cells because the NTN cell's coverage is greater than the TN cell's.

[0006] To address this challenge, various interference cancellation techniques, including inter-cell interference coordination (ICIC), advanced ICIC (eICIC), and further eICIC (FeICIC), can be considered to reduce inter-cell interference in existing standards. However, considering the different propagation delays between TN and NTN cells, it is difficult to synchronize the time of satellites corresponding to NTN cells because satellites are always moving. In addition, the system bandwidths of TN and NTN cells are different, making it difficult to apply these various interference cancellation techniques. Summary of the Invention

[0007] The present inventive concept provides a method and apparatus for mitigating inter-cell interference based on data blanking information and cell-specific reference signal (CRS) blanking information of neighboring cells.

[0008] According to an aspect of the inventive concept, a method for operating an electronic device is provided, the method comprising: receiving data blanking information from a serving cell; identifying at least one first subframe and at least one second subframe based on a timing offset and the data blanking information, wherein resource allocation between the serving cell and the interfering cell overlaps in the at least one first subframe and resource allocation does not overlap in the at least one second subframe; increasing a first weight for a first log-likelihood ratio (LLR) corresponding to the at least one first subframe; decreasing a second weight for a second LLR corresponding to the at least one second subframe; and calculating a third LLR based on the first LLR and the second LLR.

[0009] According to one aspect of the present invention, a method for operating an electronic device is provided, the method comprising: sending user equipment (UE) capability information to a serving cell; receiving cell-specific reference signal (CRS) blank information for an interfering cell from the serving cell; detecting a timing difference between the serving cell and the interfering cell; identifying a CRS blank subframe based on the timing difference and the CRS blank information; and mitigating interference based on the CRS blank subframe.

[0010] According to one aspect of the present invention, an electronic device is provided, comprising: a processing circuit configured to send user equipment (UE) capability information to a serving cell; receive cell-specific reference signal (CRS) blank information for an interfering cell from the serving cell; detect a timing difference between the serving cell and the interfering cell; identify a CRS blank subframe based on the timing difference and the CRS blank information; and mitigate interference based on the CRS blank subframe. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The embodiments will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0012] Figure 1A A wireless communication system in which inter-cell interference occurs according to an embodiment is shown;

[0013] Figure 1B A wireless communication system in which inter-cell interference occurs according to an embodiment is shown;

[0014] Figure 2 is a block diagram of a base station according to an embodiment;

[0015] Figure 3 is a block diagram of an electronic device according to an embodiment;

[0016] Figure 4 shows scheduling of a serving cell and neighboring cells according to a comparative example;

[0017] Figure 5 is a flowchart of a method of operating a serving cell according to an embodiment;

[0018] Figure 6A shows resource allocation in performing scheduling operations according to an embodiment;

[0019] Figure 6B shows resource allocation in performing scheduling operations according to an embodiment;

[0020] Figure 7 is a flowchart of a method of operating an electronic device according to an embodiment;

[0021] Figure 8 is a flowchart of a method of operating a serving cell according to an embodiment;

[0022] Figure 9 is a flowchart of a method of operating an electronic device according to an embodiment;

[0023] Figure 10 shows scheduling of a serving cell and neighboring cells according to an embodiment; and

[0024] Figure 11 is a block diagram of a wireless communication device according to an embodiment. DETAILED DESCRIPTION

[0025] Hereinafter, embodiments are described in detail with reference to the accompanying drawings.

[0026] Figure 1A and Figure 1B Each shows a wireless communication system in which inter-cell interference occurs according to an embodiment.

[0027] Reference Figure 1A , the wireless communication system 10 may include a serving cell 110 , a neighboring cell 120 and / or an electronic device 130 .

[0028] According to an embodiment, the serving cell 110 and the neighboring cell 120 are network infrastructure that provides wireless access to the electronic device 130. The serving cell 110 and the neighboring cell 120 may each have a coverage area defined as a specific geographic area based on the distance at which a signal can be transmitted. For example, the coverage area of the serving cell 110 corresponding to a non-terrestrial network (NTN) cell may be much larger than the coverage area of the neighboring cell 120 corresponding to a terrestrial network (TN) cell. In addition to base stations, the serving cell 110 and / or the neighboring cell 120 may also be replaced by (e.g., implemented using) access points (APs), eNodeBs (eNBs), fifth generation (5G) nodes, wireless points, or other terms having equivalent technical meanings.

[0029] According to an embodiment, the serving cell 110 may correspond to an NTN cell providing NTN. For example, the serving cell 110 may include a communication satellite. The communication satellite may include a geostationary earth orbit (GEO) satellite or a low earth orbit (LEO) satellite. A GEO satellite maintains a fixed position in altitude and direction relative to a position (e.g., a random position) at an altitude of approximately 35,000 km on the earth. Therefore, in the case of a GEO satellite, the electronic device 130 can observe the GEO satellite floating at a fixed position at any time. A LEO satellite orbits the earth at an altitude of approximately 300 km to approximately 1,500 km. Therefore, in the case of a LEO satellite, the electronic device 130 can communicate with the LEO satellite only during a specific time period corresponding to line of sight (LoS).

[0030] The neighboring cell 120 may correspond to a TN cell that provides a TN. For example, the neighboring cell 120 may correspond to a base station device at a fixed position on the ground. The neighboring cell 120 may transmit a wireless signal to the electronic device 130 located at the edge of the coverage of the neighboring cell 120. For example, the neighboring cell 120 may transmit a reference signal including a cell-specific reference signal (CRS), a channel state information-reference signal (CSI-RS) and / or a demodulation reference signal (DMRS) and / or a downlink signal including user data (e.g., a physical downlink shared channel (PDSCH)) to the electronic device 130.

[0031] According to an embodiment, the electronic device 130 used by the user can communicate with the serving cell 110 through a wireless channel and receive wireless signals (e.g., PDSCH channels, reference signals, etc.) from the neighboring cell 120. In addition to the terminal, the electronic device 130 can also be replaced by (e.g., implemented by) user equipment (UE), mobile station, subscriber station, customer premises equipment (CPE), remote terminal, wireless terminal, user device, or other terms with equivalent technical meanings.

[0032] According to an embodiment, the electronic device 130 may not only be located in the coverage of the serving cell 110, but also be located in the coverage of the neighboring cell 120 at the same time (or during the same period). Figure 1A , the electronic device 130 may be located at a position where the coverage edge of the serving cell 110 and the coverage edge of the neighboring cell 120 overlap. In this case, inter-cell interference may occur between the serving cell 110 and the neighboring cell 120. For another example, referring to Figure 1BAlthough the electronic device 130 is not located at the coverage edge of the serving cell 110, the electronic device 130 may be located within the coverage of the serving cell 110 and simultaneously (or concurrently) at the coverage edge of the neighboring cell 120. This is because the serving cell 110 transmits signals at a higher altitude via a satellite and has a larger coverage size, so the coverage of the neighboring cell 120 may be included (e.g., completely included) in the coverage of the serving cell 110.

[0033] In the above example, the serving cell 110 is shown as a communication satellite corresponding to an NTN cell, and the neighboring cell 120 is shown as a base station device corresponding to a TN cell, but the present invention is not limited thereto. Depending on the embodiment, the present invention may include all examples in which interference occurs when the electronic device 130 receives signals from the NTN cell and the TN cell simultaneously (or contemporaneously). For example, the serving cell 110 may correspond to a TN cell, and the neighboring cell 120 may correspond to an NTN cell.

[0034] Figure 2 is a block diagram of a base station 200 according to an embodiment.

[0035] According to an embodiment, the base station 200 may correspond to Figure 1A and Figure 1B The serving cell 110 or the neighboring cell 120 is shown. Figure 2 , the base station 200 may include a wireless communication circuit 210 , a backhaul communication circuit 220 , a memory 230 and / or a control circuit 240 .

[0036] The wireless communication circuit 210 can perform the function of sending and receiving signals through a wireless channel. According to an embodiment, the wireless communication circuit 210 can perform the conversion function between the baseband signal and the bit string according to the physical layer specification of the system. For example, when sending data, the wireless communication circuit 210 can generate complex symbols by encoding and modulating the transmitted bit string, and when receiving data, the wireless communication circuit 210 can restore the received bit string by demodulating and decoding the baseband signal. In addition, the wireless communication circuit 210 can up-convert the baseband signal into a radio frequency (RF) band signal and send it through the antenna, or can down-convert the RF band signal received through the antenna into a baseband signal. In this way, the wireless communication circuit 210 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC) and / or an analog-to-digital converter (ADC).

[0037] Wireless communication circuitry 210 can transmit and receive signals. For example, wireless communication circuitry 210 can transmit synchronization signals, reference signals, system information, messages, control information, and / or data. Furthermore, wireless communication circuitry 210 can perform beamforming. To provide directionality to transmitted and received signals, wireless communication circuitry 210 can apply beamforming weights to the signals. Wireless communication circuitry 210 can repeatedly transmit signals by changing the formed beam.

[0038] The backhaul communication circuit 220 provides an interface for communicating with other nodes in the network. That is, the backhaul communication circuit 220 can convert a bit string sent from the base station 200 to another node (e.g., another access node, another base station, an upper node, and / or a core network) into a physical signal, and can convert a physical signal received from another node into a bit string. According to an embodiment, data blank information and / or CRS blank information can be provided to the backhaul communication circuit 220 by a neighboring cell (e.g., a TN cell) or shared with the backhaul communication circuit 220.

[0039] The memory 230 stores data used for the operation of the base station 200, such as basic programs, applications, and / or setting information. The memory 230 may include volatile memory, non-volatile memory, or a combination of volatile memory and non-volatile memory. For example, the memory 230 may store data blanking information and / or CRS blanking information shared by neighboring cells (e.g., TN cells).

[0040] The control circuit 240 may control the operation of the base station 200. In this way, the control circuit 240 may include at least one processor. The control circuit 240 may control the wireless communication circuit 210 and / or the backhaul communication circuit 220 to send and receive signals. For example, the control circuit 240 may receive data blank information and / or CRS blank information of a neighboring cell through the backhaul communication circuit 220, and may send the data blank information and / or CRS blank information of the base station 200 to a neighboring cell (e.g., a TN cell). For another example, the control circuit 240 may exchange data signals and / or reference signals with a terminal (e.g., an electronic device 130) through the wireless communication circuit 210. In addition, the control circuit 240 may read and write data to the memory 230. For example, the control circuit 240 may store data blank information and / or CRS blank information shared by or received from a neighboring cell (e.g., a TN cell) in the memory 230. In addition, the control circuit 240 may perform scheduling for sending and receiving signals. For example, the control circuit 240 may schedule resources based on data blanking information shared by or received from a neighboring cell (e.g., a TN cell) so that a downlink signal (e.g., a PDSCH) to be transmitted to the electronic device 130 does not overlap with a signal of the neighboring cell in the time domain and the frequency domain. For another example, the control circuit 240 may schedule resources based on CRS blanking information shared by or received from a neighboring cell (e.g., a TN cell) so that a reference signal (e.g., a CRS, a CSI-RS, and / or a DMRS) to be transmitted to the electronic device 130 does not overlap with a signal of the neighboring cell in the time domain and the frequency domain.

[0041] Figure 3 is a block diagram of an electronic device 300 according to an embodiment.

[0042] Figure 3 The electronic device 300 may correspond to Figure 1A and Figure 1B The electronic device 130. Figure 3 , the electronic device 300 may include a communication circuit 310 , a memory 320 and / or a control circuit 330 .

[0043] The communication circuit 310 performs the function of sending and receiving signals through a wireless channel. For example, the communication circuit 310 performs a conversion function between a baseband signal and a bit string according to the physical layer specifications of the system. For example, when transmitting data, the communication circuit 310 can generate complex symbols by encoding and modulating the transmitted bit string, and when receiving data, the communication circuit 310 can recover the received bit string by demodulating and decoding the baseband signal. In addition, the communication circuit 310 can up-convert the baseband signal to an RF band signal and transmit it via an antenna, or can down-convert the RF band signal received via the antenna to a baseband signal. For example, the communication circuit 310 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a DAC and / or an ADC. The communication circuit 310 can perform beamforming. In order to provide directionality to the signals to be transmitted and received, the communication circuit 310 can apply beamforming weights to the signals.

[0044] The communication circuit 310 can transmit and receive signals. The communication circuit 310 can receive downlink signals. The downlink signals may include synchronization signals (SS), reference signals (RS), system information, configuration messages, control information, and / or downlink data. In addition, the communication circuit 310 can transmit uplink signals. The uplink signals may include random access-related signals and / or reference signals (e.g., sounding reference signals (SRS) and / or DMRS) and / or uplink data.

[0045] The memory 320 may store data used for the operation of the electronic device 300, such as basic programs, applications, and / or setting information. The memory 320 may include a volatile memory, a non-volatile memory, or a combination of a volatile memory and a non-volatile memory. In addition, the memory 320 may provide stored data according to a request of the control circuit 330. For example, the memory 320 may store data blanking information and / or CRS blanking information of a neighboring cell (e.g., a NT cell) signaled by a serving cell (e.g., a TNT cell) via radio resource control (RRC).

[0046] According to an embodiment, the memory 320 may further include blank information 325. The blank information 325 may include information stored by receiving signaling from a serving cell (e.g., a TNT cell) via RRC. For example, the blank information 325 may include data blank information and CRS blank information of a neighboring cell (e.g., a TN cell) that causes inter-cell interference relative to the serving cell. The data blank information may refer to information about an area to which resources are not allocated for a downlink signal (e.g., a PDSCH) transmitted by a neighboring cell. The CRS blank information may refer to information about an area to which resources are not allocated for a reference signal transmitted by a neighboring cell. According to an embodiment, the electronic device 300 may calculate an improved log-likelihood ratio (LLR) based on the data blank information and the CRS blank information. The calculation of the improved LLR may be described below. According to an embodiment, the area of the downlink signal and / or the reference signal may refer to the time resources (e.g., time slots) and / or frequency resources (e.g., subcarriers) of the downlink signal and / or the reference signal.

[0047] The control circuit 330 can control the operation of the electronic device 300. For example, the control circuit 330 can send and receive signals through the communication circuit 310. In addition, the control circuit 330 can read and write data to the memory 320. Thus, the control circuit 330 may include at least one processor or microprocessor, or may be part of a processor. When the control circuit 330 is part of a processor, the communication circuit 310 and a portion of the control circuit 330 may be referred to as a communication processor (CP).

[0048] According to an embodiment, the control circuit 330 may further include an interference control circuit 335. The interference control circuit 335 may perform comprehensive operations to eliminate (or reduce) interference. For example, when CRS blanking information is not signaled from a serving cell (e.g., a TNT cell), the interference control circuit 335 may perform CRS channel estimation of a neighboring cell to determine whether CRS transmitted from a neighboring cell (e.g., a TN cell) causes interference. For another example, when the serving cell and the neighboring cell symbol boundaries are not synchronized, the interference control circuit 335 may perform data-assisted interference whitening (DA-IW) to determine whether CRS transmitted to a neighboring cell (e.g., a TN cell) exists. For another example, the interference control circuit 335 may perform LLR adjustment. LLR adjustment may refer to calculating an improved LLR by assigning a higher weight to LLRs detected in areas where downlink signals or CRSs do not overlap between the neighboring cell and the serving cell, and assigning a lower weight to LLRs detected in areas where downlink signals or CRSs overlap between the neighboring cell and the serving cell. The electronic device 300 may improve decoding capability through hybrid automatic repeat request (HARQ) combining based on the improved LLR.

[0049] Figure 4 Scheduling of a serving cell and neighboring cells according to a comparative example is shown.

[0050] Reference Figure 4 , the serving cell and the neighboring cell may transmit signals simultaneously (or contemporaneously).According to an embodiment, the serving cell may correspond to an NTN cell, and the neighboring cell may correspond to a TN cell.

[0051] To mitigate inter-cell interference, the neighboring cell may share an almost blank subframe (ABS) pattern with the serving cell based on eICIC and may not allocate resources (e.g., radio frequency (RF) resources and / or RF energy) to the subframes corresponding to the ABS pattern. Figure 4 , the neighboring cell may allocate resources to the two subframes and may not allocate resources to the two following subframes. In the neighboring cell, the two subframes to which resources are allocated and the two subframes corresponding to the ABS pattern may be repeated alternately.

[0052] The serving cell may receive information about the ABS pattern from a neighboring cell and allocate resources only to subframes corresponding to the ABS pattern. For example, based on the ABS pattern, the serving cell may identify whether the neighboring cell has allocated resources to the first and second subframes and whether the neighboring cell has not allocated resources to the third and fourth subframes. The serving cell may not allocate resources to the first and second subframes to which resources were allocated by the neighboring cell. The serving cell may allocate downlink resources to the third and fourth subframes to which resources were not allocated by the neighboring cell. Since the remaining subframes starting from the fifth subframe repeat the pattern of the first to fourth subframes, their description is omitted.

[0053] According to an embodiment, there may be a timing offset between the serving cell and the adjacent cell. Since the TN cell is in a fixed position and the NTN cell is continuously moving, the timing offset may be caused by the propagation delay difference between the NTN cell and the TN cell and the difficulty of synchronization. For example, the first subframe of the serving cell may be sent with a timing offset delay compared to the first subframe of the adjacent cell. However, when there is a timing offset, the effect of avoiding (or reducing) interference by allocating resources at different times based on the ABS pattern can be minimized (or smaller). For example, even with a timing offset, the third subframe of the serving cell spans the third and fourth subframes of the adjacent cell, thereby resulting in the effect of avoiding (or reducing) interference. However, the fourth subframe of the serving cell spans the fourth and fifth subframes of the adjacent cell, thereby resulting in interference between the adjacent cell and the serving cell.

[0054] Figure 5 is a flowchart of a method of operating the serving cell 110 according to an embodiment.

[0055] Reference Figure 5 In operation S510, the serving cell 110 may share data blanking information with the neighboring cell 120. The data blanking information may refer to information about an area to which the neighboring cell 120 does not allocate resources for transmitting user data. According to an embodiment, the serving cell 110 and the neighboring cell 120 may share data blanking information with each other. Figure 2 The backhaul communication circuit 220 in the data whitespace information is shared. For example, the data whitespace information may include frequency domain information and time domain information, and may be as shown in Table 1 below.

[0056] [Table 1]

[0057]

[0058]

[0059] According to an embodiment, the frequency domain information may include information about the position of the starting resource block (RB) of the blank area (e.g., subcarrier) to which no resources are allocated in the frequency domain and the length of the RB in the frequency domain. The data blanking information includes the frequency domain information because the system bandwidths of the TN cell and the NTN cell may be different. Figure 4 As shown, blanking the entire RB area with ABS subframes is not efficient. For example, when a TN cell provides services of 100 RBs and an NTN cell only provides services of 6 RBs, it may be more efficient for the TN cell to blank only the 6 RBs that overlap with the NTN cell for resource utilization.

[0060] According to an embodiment, the time domain information may include information about subframe bursts in the time domain of blank areas to which no resources are allocated. A subframe burst may include a frame having 10 subframes, but is not limited thereto. According to an embodiment, a subframe burst may be shorter than a frame or longer than a frame. For example, a subframe burst may have 5 subframes as a burst unit, or may have 2 frames, 4 frames, or 5 frames instead of 1 frame as a burst unit. In addition, the burst unit is not limited to the number of subframes or frames mentioned above, but may include different numbers of subframes or frames. According to an embodiment, the resources of resource allocation and scheduling discussed herein may refer to time resources (e.g., time slots) and / or frequency resources (e.g., subcarriers) based on which signals (e.g., communication signals) may be transmitted. According to an embodiment, overlap between resource allocations may refer to signal transmission by the serving cell 110 and the adjacent cell 120 based on the same (or similar) time and / or frequency resources, thereby causing interference between signal transmissions.

[0061] In operation S520, serving cell 110 may determine whether a timing difference is identified with neighboring cell 120. For example, serving cell 110 may share not only data blanking information but also information regarding transmission timing with neighboring cell 120. When serving cell 110 has information regarding the transmission timing of neighboring cell 120, serving cell 110 may determine whether a timing difference exists between serving cell 110 and the subframe to be transmitted to electronic device 130.

[0062] In operation S530, the serving cell 110 may perform scheduling other than the blank transition segment identified based on the timing difference. When the timing difference with the neighboring cell 120 is identified in operation S520, the serving cell 110 may identify the blank transition segment. The blank transition segment may refer to a segment where the resource allocation of the serving cell 110 and the neighboring cell 120 overlaps due to the timing difference, even if the serving cell 110 has allocated resources to a subframe to which the neighboring cell 120 has not allocated resources. For example, even if resources are allocated to avoid overlapping between the serving cell 110 and the neighboring cell 120, the resource allocation may overlap in the last subframe of the subframe burst due to a timing difference of a certain size. The serving cell 110 may calculate the blank transition segment using the identified timing difference, and may prevent (or reduce) inter-cell interference in advance by allocating resources other than the subframe corresponding to the blank transition segment.

[0063] In operation S540, serving cell 110 may perform scheduling based on the shared data blanking information. Although serving cell 110 cannot identify timing differences with neighboring cell 120 in operation S520, serving cell 110 may perform scheduling based on the data blanking information of neighboring cell 120 to allocate resources to subframes to which neighboring cell 120 does not allocate resources. For example, when the transmission timing of neighboring cell 120 and serving cell 110 is the same (or similar), resources may be allocated at different times, thereby preventing (or reducing) interference in advance. For another example, even if the transmission timing of neighboring cell 120 and serving cell 110 is different, inter-cell interference may only occur in some subframes in the second half of a subframe burst. In this case, compared to a case where inter-cell interference occurs in every subframe of a specific segment, as in the case of the conventional ABS pattern described below, the number of interference events (e.g., the number of subframes in which inter-cell interference occurs) can be reduced, thereby mitigating inter-cell interference. According to an embodiment, scheduling of allocating resources to subframes to which the neighboring cell 120 does not allocate resources may include: scheduling, by the serving cell 110, transmission using different time and / or frequency resources than those used by the neighboring cell 120 to prevent or reduce interference between signal transmissions.

[0064] In operation S550, the serving cell 110 may signal data blanking information of the neighboring cell 120 to the electronic device 130. For example, the serving cell 110 may provide the data blanking information to the electronic device 130 via RRC signaling, and may provide the data blanking information to the electronic device 130 via a medium access control-control element (MAC-CE) or downlink control information (DCI). The data blanking information provided by the serving cell 110 to the electronic device 130 may be as shown in Table 2 below.

[0065] [Table 2]

[0066]

[0067]

[0068] According to an embodiment, the electronic device 130 may calculate the improved LLR based on data blank information described below.

[0069] Figure 6A Resource allocation in operation S540 according to an embodiment is shown.

[0070] Reference Figure 6A The transmission timing of the serving cell 110 may be different from the transmission timing of the neighboring cell 120. For example, the serving cell 110 may start transmitting after the neighboring cell 120 by a timing offset.

[0071] The neighboring cell 120 may provide data blanking information to the serving cell 110, wherein Figure 6A The data blanking information may include time domain information indicating that the subframe burst is one frame. In addition, although not shown, when the frequency bandwidth is different, the data blanking information may also have frequency domain information including a starting RB and an RB length.

[0072] According to an embodiment, the serving cell 110 may not recognize the timing difference with the neighboring cell 120, and may perform scheduling based on the data blank information of the neighboring cell 120, so that the resource allocation of the serving cell 110 does not overlap with the resource allocation of the neighboring cell 120. Therefore, the serving cell 110 may not allocate resources to the first frame (the initial 10 subframes) but allocate resources to the second frame (the next 10 subframes). If there is no timing difference between the neighboring cell 120 and the serving cell 110, the resource allocation of the neighboring cell 120 and the serving cell 110 may not overlap. In this example, due to the presence of the timing deviation, the electronic device 130 may sense inter-cell interference in segment 610. However, according to the conventional ABS pattern, the inter-cell interference caused by the resource allocation overlapping every two subframes is not as good as that caused by the conventional ABS pattern. Figure 4In contrast, when using data blanking based on subframe bursts, inter-cell interference occurs only to the extent of the timing difference in the last subframe of the subframe burst. In other words, the time and frequency of resource allocation overlap is reduced, thereby mitigating inter-cell interference.

[0073] Figure 6B Resource allocation in operation S530 according to an embodiment is shown.

[0074] Reference Figure 6B The transmission timing of the serving cell 110 may be different from the transmission timing of the neighboring cell 120. For example, the serving cell 110 may start transmitting after the neighboring cell 120 by a timing offset.

[0075] The neighboring cell 120 may provide data blanking information to the serving cell 110, wherein Figure 6B The data blanking information may include time domain information indicating that the subframe burst is one frame. In addition, although not shown, when the frequency bandwidth is different, the data blanking information may also have frequency domain information including the starting RB and the RB length.

[0076] According to an embodiment, serving cell 110 may identify blank transition section 620 because it recognizes a timing difference with neighboring cell 120. For example, while scheduling is performed based on data blanking information of neighboring cell 120 so that resource allocation of serving cell 110 does not overlap with resource allocation of neighboring cell 120, serving cell 110 may calculate that resource allocation of serving cell 110 will overlap with resource allocation of neighboring cell 120 in the last subframe of a subframe burst. Therefore, serving cell 110 may allocate resources to the second frame (the next 10 subframes), but may not allocate resources to the last subframe corresponding to blank transition section 620 to avoid (or reduce) inter-cell interference.

[0077] Figure 7 is a flowchart of a method of operating the electronic device 130 according to an embodiment.

[0078] Reference Figure 7 In operation S710, the electronic device 130 may receive data blanking information (eg, CRS blanking information) from the serving cell 110. The data blanking information may be received through RRC signaling, or may be received through MAC-CE or DCI.

[0079] In operation S720, the electronic device 130 may identify subframes in which resource allocations overlap based on the timing deviation. The electronic device 130 may identify areas in which resource allocations of the serving cell 110 and the neighboring cell 120 overlap based on the timing deviation and the data blank information received from the serving cell 110. For example, the electronic device 130 may detect a timing difference between the serving cell 110 and the neighboring cell 120. Then, the electronic device 130 may identify in which subframes resource allocations overlap and in which subframes resource allocations do not overlap based on the data blank information and the detected timing difference. For example, referring to Figure 6A , based on the detected timing difference, when the signal of the serving cell 110 is received at a time that is the same as the timing deviation, the electronic device 130 can identify subframes in which resource allocations do not overlap (for example, at least one CRS blank subframe) and subframes in which resource allocations overlap. For example, when the timing deviation is less than one subframe, the electronic device 130 can identify that resource allocations overlap only in the last subframe of the 10 subframes constituting the subframe burst. For another example, when the timing deviation is greater than one subframe and less than two subframes, the electronic device 130 can identify that resource allocations overlap in the last two subframes of the 10 subframes constituting the subframe burst. That is, the electronic device 130 can identify subframes in which resource allocations overlap between the serving cell 110 and the neighboring cell 120 based on the size of the timing deviation.

[0080] In operation S730, the electronic device 130 may increase the first weight corresponding to the first LLR of the subframe in which the resource allocation does not overlap. The first weight may include a HARQ combining weight value indicating how much the first LLR is reflected when generating a new LLR. For example, referring to Figure 6A For the first to ninth subframes where resource allocations of subframe bursts (e.g., the second frame) do not overlap, inter-cell interference does not occur because there is no resource allocation from the neighboring cell 120. Therefore, to increase the ratio reflecting the first LLRs corresponding to the first to ninth subframes, the first weight corresponding to the first LLR may be increased.

[0081] In operation S740, the electronic device 130 may reduce the second weight corresponding to the second LLR of the subframe in which the resource allocation overlaps. The second weight may include a HARQ combining weight value indicating how much the second LLR is reflected when generating a new LLR. For example, referring to Figure 6A In the tenth subframe where the resource allocation of a subframe burst (e.g., the second frame) overlaps, resource allocation of a neighboring cell 120 exists, causing inter-cell interference. Therefore, to reduce the ratio reflecting the second LLR corresponding to the tenth subframe, the second weight corresponding to the second LLR may be reduced.

[0082] In operation S750, the electronic device 130 may calculate a third LLR based on the first LLR and the second LLR. The electronic device 130 may calculate an improved LLR using the data blank information. The improved LLR may correspond to the third LLR. The electronic device 130 may calculate the third LLR according to the following equation.

[0083] [Equation 1]

[0084] LLR combining

[0085] =Concatenate(w noBlank LLR noBlank ,w Blank LLR Blank ),w noBlank <w Blank LLR Blank may include subframes corresponding to which resource allocations do not overlap (e.g., Figure 6A The first LLR of the subframe burst (the first subframe to the ninth subframe in the subframe burst), and w Blank A first weight for the first LLR may be included. noBlank may include subframes corresponding to where resource allocations overlap (e.g., Figure 6A The second LLR of the tenth subframe of the subframe burst in noBlank A second weight for the second LLR may be included. combining A third LLR corresponding to the improved LLR may be included. Therefore, the electronic device 130 can improve decoding capability by setting the weight of the LLR higher in the area where the resource allocation of the serving cell 110 and the neighboring cell 120 does not overlap based on the data blanking information of the neighboring cell 120 signaled from the serving cell 110.

[0086] Figure 8 is a flowchart of a method of operating the serving cell 110 according to an embodiment.

[0087] Reference Figure 8 In operation S810, the serving cell 110 may receive UE capability information from the electronic device 130. The UE capability information may include TD (time domain) granularity information of the electronic device 130. The UE capability information may be as shown in Table 3 below.

[0088] [Table 3]

[0089]

[0090] TD granularity information may include subframe units or the entire time domain. Depending on the timing difference compensation capability of the electronic device 130, the TD granularity information may include subframe units or the entire time domain. For example, when the electronic device 130 cannot compensate for the timing difference for the subframe unit (such as when the electronic device 130 is running at a lower power), the TD granularity information may correspond to the entire time domain. For another example, when the electronic device 130 can compensate for the timing difference for the subframe unit, the TD granularity information may correspond to the subframe unit. However, the TD granularity information may correspond not only to one subframe or the entire time domain, but may correspond to various numbers of subframes. According to an embodiment, the UE capability information may include information about the time domain unit (e.g., TD granularity information). The time domain unit may represent one of a subframe, a frame, and a subframe burst.

[0091] In operation S820, the serving cell 110 may share CRS blanking information with the neighboring cell 120 based on the UE capability information. The CRS blanking information may refer to information about an area where the neighboring cell 120 does not allocate resources for transmitting CRS. According to an embodiment, the serving cell 110 and the neighboring cell 120 may share CRS blanking information with each other. Figure 2 The backhaul communication circuit 220 in the serving cell 110 may share CRS blanking information. According to an embodiment, the serving cell 110 and the neighboring cell 120 may share CRS blanking information based on a request / response process initiated by one or both of the serving cell 110 and the neighboring cell 120, but the embodiment is not limited thereto. According to an embodiment, one or both of the serving cell 110 and / or the neighboring cell 120 may periodically provide CRS blanking information to the other of the serving cell 110 and / or the neighboring cell 120 in response to a trigger condition or in other manners. For example, the CRS blanking information may include frequency domain information and time domain information, and may be as shown in Table 4 below.

[0092] [Table 4]

[0093]

[0094] According to an embodiment, the frequency domain information may include information about the position of the starting RB of the blank area to which no resources are allocated in the frequency domain and the length of the RB in the frequency domain. The CRS blank information may include frequency domain information because the system bandwidths of the TN cell and the NTN cell may be different. Figure 4 It is inefficient to blank the entire RB area with ABS subframes. For example, when the TN cell provides a service of 100 RBs and the NTN cell only provides a service of 6 RBs, it may be more efficient for the TN cell to blank only the 6 RBs that overlap with the NTN cell for resource utilization.

[0095] According to an embodiment, the time domain information may include information about a subframe bitmap in the time domain of a blank area to which no resources are allocated. The subframe bitmap may indicate subframes to which no resources are allocated for the reference signal neighboring cell 120. According to an embodiment, the CRS blanking information may include a subframe bitmap based on a time domain unit corresponding to a subframe (also referred to herein as subframe bitmap information).

[0096] In addition, according to an embodiment, the time domain information may not include information about the subframe bitmap. That is, because the timing difference is not compensated for in subframe units, the electronic device 130 may send UE capability information including TD granularity information corresponding to the entire time domain to the serving cell 110. In this case, although the time domain information including the subframe bitmap notifies the electronic device 130 of a specific subframe to which resources are not allocated, it is not necessary to specify the specific subframe because it is difficult for the electronic device 130 to adjust the timing for the specific subframe. Therefore, when the UE capability information of the electronic device 130 includes the entire time domain, the time domain information may not include information about the subframe bitmap.

[0097] In operation S830, the serving cell 110 may perform scheduling based on the shared CRS blank information. The serving cell 110 may perform scheduling based on the CRS blank information of the neighboring cell 120 to allocate resources to subframes to which the neighboring cell 120 does not allocate resources. For example, when the transmission timing of the neighboring cell 120 and the serving cell 110 is the same (or similar), resources may be allocated at different times, thereby preventing (or reducing) interference in advance. For another example, when the transmission timing of the neighboring cell 120 and the serving cell 110 is different, even if the timing deviation is large, the serving cell 110 may perform scheduling to prevent (or reduce) CRS interference by setting a guard subframe for the interval in the CRS blank transition segment.

[0098] In operation S840, the serving cell 110 may signal the CRS blanking information of the neighboring cell 120 to the electronic device 130. For example, the serving cell 110 may provide the CRS blanking information to the electronic device 130 through RRC signaling, or may provide the CRS blanking information to the electronic device 130 through MAC-CE or DCI. The CRS blanking information provided to the electronic device 130 by the serving cell 110 may be shown in Table 5 below.

[0099] [Table 5]

[0100]

[0101]

[0102] According to an embodiment, the time domain information of the CRS blanking information signaled to the electronic device 130 may be omitted. For example, when the TD granularity information of the UE capability information sent to the serving cell 110 by the electronic device 130 corresponds to the entire time domain, the serving cell 110 may explicitly indicate that the time domain information is the entire time domain, or may signal the CRS blanking information without including the time domain information to the electronic device 130.

[0103] Figure 9 is a flowchart of a method of operating the electronic device 130 according to an embodiment.

[0104] Reference Figure 9 In operation S910, the electronic device 130 may determine whether CRS blanking information of the neighboring cell 120 is received from the serving cell 110. The signaling of the CRS blanking information depends on the serving cell 110, and the serving cell 110 may not signal the CRS blanking information to the electronic device 130. When the CRS blanking information is not obtained, the electronic device 130 may directly detect the blank area and remove interference based on the detection result. When the CRS blanking information is obtained, the electronic device 130 may remove interference based on the CRS blanking information.

[0105] In operation S920, the electronic device 130 may mitigate CRS interference (e.g., by performing at least operations similar to the above-described operations S720-S750) based on the CRS blanking information of the neighboring cell 120. Mitigation of interference may refer to the execution of various techniques for mitigating inter-cell interference, such as CRS interference cancellation (CRS-IC) and / or LLR adjustment.

[0106] According to an embodiment, the electronic device 130 may detect a timing deviation between the neighboring cell 120 and the serving cell 110, and detect a CRS blanking area based on the detected timing deviation and CRS blanking information. Figure 10 , the timing difference between the neighboring cell 120 and the serving cell 110 may be as much as 4 subframes. The transmission timing of the serving cell 110 may be earlier than the transmission timing of the neighboring cell 120. That is, the size of the timing deviation may be 4 subframes. In addition, the CRS blank information received by the electronic device 130 may include time domain information indicating the second subframe, the third subframe, the seventh subframe and the eighth subframe. The electronic device 130 may identify the CRS blank area of the serving cell 110 based on the CRS blank information and the timing deviation. The electronic device 130 may delay the neighboring cell 120 by 4 subframes and identify the subframe of the serving cell 110 corresponding to the CRS blank information. For example, the electronic device 130 may identify that the serving cell 110 has allocated resources to the first subframe, the second subframe, the sixth subframe and the seventh subframe.

[0107] According to an embodiment, the electronic device 130 may perform HARQ combining based on the improved LLRs. For example, the electronic device 130 may set higher weights for the LLRs corresponding to the first subframe, the second subframe, the sixth subframe, and the seventh subframe identified as resources allocated only to the serving cell 110, and may set lower weights for the LLRs of the remaining subframes.

[0108] According to an embodiment, the electronic device 130 may perform HARQ combining using only the LLRs corresponding to the blank area. For example, the electronic device 130 may perform HARQ combining by utilizing only the LLRs corresponding to the first subframe, the second subframe, the sixth subframe, and the seventh subframe identified as resources allocated only to the serving cell 110 and discarding the LLRs for the remaining subframes (e.g., setting the weights for the remaining subframes to zero).

[0109] In operation S930, the electronic device 130 may detect a CRS blank area. Since the electronic device 130 does not receive the CRS blank information of the neighboring cell 120 from the serving cell 110, the electronic device 130 may not know the subframes in which the resources of the neighboring cell 120 are not allocated. Therefore, the electronic device 130 may determine whether the CRS of the neighboring cell 120 exists based on channel estimation. For example, the electronic device 130 may perform channel estimation for each of the serving cell 110 and the neighboring cell 120. The electronic device 130 may obtain the channel power of the serving cell 110 and the channel power of the neighboring cell 120 based on the channel estimation. The electronic device 130 may determine whether to allocate the resources of the neighboring cell 120 according to the following equation.

[0110] [Equation 2]

[0111] P ITF <γ(P SERV )

[0112] P ITF It can represent the channel power of the neighboring cell 120, P SERV may represent the channel power of serving cell 110, and γ may represent an adjustable threshold. When the channel power of neighboring cell 120 and the channel power of serving cell 110 satisfy the relationship of Equation 2, electronic device 130 may determine that resources for the reference signal of neighboring cell 120 are not allocated. When the channel power of neighboring cell 120 and the channel power of serving cell 110 do not satisfy the relationship of Equation 2, electronic device 130 may determine that resources of neighboring cell 120 are allocated. Depending on the embodiment, the adjustable threshold may be a design parameter determined through empirical research.

[0113] According to an embodiment, when the symbol boundaries of the neighboring cell 120 and the serving cell 110 do not match, the electronic device 130 may calculate the channel covariance of the neighboring cell 120 based on the DA-IW. The electronic device 130 may determine whether to allocate resources of the neighboring cell 120 based on the following equation.

[0114] [Equation 3]

[0115] R=E{HH H}

[0116] In operation S940, the electronic device 130 may mitigate interference based on the detected CRS white space (e.g., by performing operations at least similar to the above-described operations S720-S750). Mitigation of interference may refer to performing various techniques to mitigate inter-cell interference, such as CRS-IC and LLR adjustment. According to an embodiment, after mitigating interference in operation S920 or S940 (or operation S750), the electronic device 130 may perform communication with the serving cell 110. For example, the electronic device 130 may (e.g., using the control circuit 330) generate a first signal; (e.g., using the communication circuit 310) process the first signal to perform one or more of modulation, up-conversion, filtering, amplification, and / or encryption on the first signal; and transmit the processed first signal to the serving cell 110 via one or more antennas of the electronic device 130. Additionally or alternatively, the electronic device 130 may receive a second signal from the serving cell 110 via one or more antennas of the electronic device 130; process the second signal (e.g., using the communication circuit 310) to perform one or more of demodulation, down-conversion, filtering, amplification, and / or decryption on the second signal; and perform further operation(s) based on the processed second signal (e.g., using the control circuit 330). For example, the further operation(s) may include providing the processed second signal to a corresponding application executed on the electronic device 130; storing the processed second signal; sending a response signal to the serving cell 110 (e.g., based on the processing results of the corresponding application executed on the electronic device 130), etc.

[0117] Figure 11 is a block diagram of a wireless communication device according to an embodiment.

[0118] Reference Figure 11 , the wireless communication device 1100 may include a modem (not shown) and a radio frequency integrated circuit (RFIC) 1160, wherein the modem may include an application-specific integrated circuit (ASIC) 1110, an application-specific instruction set processor (ASIP) 1130, a memory 1150, a main processor 1170, and / or a main memory 1190. Figure 11 The wireless communication device 1100 may include the wireless communication device 10 according to the embodiment.

[0119] RFIC 1160, connected to antenna Ant, can receive signals from the outside or transmit signals to the outside using a wireless communication network. ASIP 1130, an integrated circuit customized for a specific purpose, can support a dedicated instruction set for a specific application and execute the instructions included in the instruction set. Memory 1150 can communicate with ASIP 1130 and, as a non-transitory storage device, can store multiple instructions executed by ASIP 1130. For example, memory 1150, as a non-limiting example, can include any type of memory accessible to ASIP 1130, such as, but not limited to, random access memory (RAM), read-only memory (ROM), magnetic tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and combinations thereof.

[0120] The main processor 1170 may control the wireless communication device 1100 by executing a plurality of instructions. For example, the main processor 1170 may control the ASIC 1110 and / or the ASIP 1130 to process data received through the wireless communication network and / or process user input of the wireless communication device 1100.

[0121] The main memory 1190 can communicate with the main processor 1170 and, as a non-transitory storage device, can store a plurality of instructions executed by the main processor 1170. For example, the main memory 1190 can include any type of memory accessible to the main processor 1170, such as, but not limited to, RAM, ROM, tapes, magnetic disks, optical disks, volatile memory, non-volatile memory, and combinations thereof.

[0122] Conventional devices and methods for communicating via non-terrestrial networks attempt to reduce inter-cell interference using various interference cancellation techniques, such as inter-cell interference coordination (ICIC), advanced ICIC (eICIC), and further eICIC (FeICIC). However, these conventional devices and methods are unable to apply these techniques with sufficient efficiency, at least due to the relative difference in propagation delay between non-terrestrial network cells and terrestrial network cells. Consequently, these conventional devices and methods suffer from excessive inter-cell interference.

[0123] However, according to embodiments, improved apparatuses and methods are provided for performing communications via non-terrestrial networks. For example, the improved apparatuses and methods can utilize data whitespace information and / or timing offset information of non-terrestrial network cells and terrestrial network cells to mitigate inter-cell interference (e.g., by utilizing scheduling using different time / frequency resources than those used by terrestrial network cells and / or performing communications via the non-terrestrial network). Thus, the improved apparatuses and methods overcome the shortcomings of conventional apparatuses and methods, thereby reducing inter-cell interference.

[0124] According to an embodiment, the operations described herein performed by the wireless communication system 10, serving cell 110, neighboring cell 120, electronic device 130, base station 200, wireless communication circuit 210, backhaul communication circuit 220, control circuit 240, electronic device 300, communication circuit 310, control circuit 330, interference control circuit 335, wireless communication device 1100, RFIC 1160, ASIC 1110, ASIP 1130, and / or main processor 1170 may be performed by processing circuitry. As used in this disclosure, the term "processing circuitry" may refer to, for example, hardware including logic circuitry; a hardware / software combination such as a processor that executes software; or a combination thereof. For example, the processing circuitry may more specifically include (but is not limited to) a central processing unit (CPU), an arithmetic logic unit (ALU), a graphics processing unit (GPU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), a system-on-chip (SoC), a programmable logic unit, a microprocessor, an application-specific integrated circuit (ASIC), and the like.

[0125] The various operations of the above methods may be performed by any suitable device capable of performing the operations (such as the processing circuits discussed above). For example, as discussed above, the operations of the above methods may be performed by various hardware and / or software implemented in accordance with some form of hardware (e.g., a processor, an ASIC, etc.).

[0126] Software may include an ordered listing of executable instructions for implementing logical functions and may be implemented in any "processor-readable medium" for use by or in conjunction with a command execution system, device, or apparatus (e.g., a single-core or multi-core processor or a system containing a processor).

[0127] The blocks or operations of the methods or algorithms and / or functions described in conjunction with the embodiments disclosed herein may be implemented directly in hardware, in software modules executed by a processor, or in a combination of the two. If implemented in software, these functions may be stored as one or more instructions or codes on or transmitted through a tangible, non-transitory computer-readable medium (e.g., memory 230, memory 320, memory 1150, and / or main memory 1190). The software module may be present in random access memory (RAM), flash memory, read-only memory (ROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, removable disk, CD ROM, or any other form of storage medium known in the art.

[0128] The embodiments may be described with reference to acts and symbolic representations (e.g., in the form of flow charts, flowcharts, data flow diagrams, structure diagrams, block diagrams, etc.) of operations that may be implemented in conjunction with the units and / or devices discussed in greater detail herein. Although discussed in a particular manner, the functions or operations specified in a particular block may be performed differently than the processes specified in the flow charts, flowcharts, etc. For example, functions or operations shown as being performed consecutively in two consecutive blocks may actually be performed simultaneously, contemporaneously, or in some cases in the reverse order.

[0129] Although the terms "first" or "second" may be used to explain various components, components are not limited by these terms. These terms should only be used to distinguish one component from another. For example, a "first" component may be referred to as a "second" component, or similarly, a "second" component may be referred to as a "first" component. When an expression such as "at least one of..." follows a list of elements, it modifies the entire list of elements without modifying the individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or any variation of the foregoing examples. As used herein, the term "and / or" includes any and all combinations of one or more of the relevant listed items.

[0130] Any arrows or lines connecting components in a diagram may represent physical data paths, logical data paths, or both. For example, a physical data path may include a data bus or transmission line. A logical data path may represent communications or data messages between software programs, software modules, subroutines, or other software components or elements.

[0131] While the inventive concept has been particularly shown and described with reference to embodiments thereof, it will be understood that various changes in form and details may be made therein without departing from the spirit and scope of the appended claims.

Claims

1. A method for operating an electronic device, the method comprising: receiving data blank information from a serving cell; identifying at least one first subframe and at least one second subframe based on the timing offset and the data blanking information, wherein resource allocation between the serving cell and the interfering cell overlaps in the at least one first subframe, and the resource allocation does not overlap in the at least one second subframe; increasing a first weight for a first log-likelihood ratio corresponding to the at least one first subframe; reducing a second weight for a second log-likelihood ratio corresponding to the at least one second subframe; as well as A third log-likelihood ratio is calculated based on the first log-likelihood ratio and the second log-likelihood ratio.

2. The method according to claim 1, wherein The serving cell corresponds to a non-terrestrial network cell; and The interfering cell corresponds to a terrestrial network cell.

3. The method according to claim 1, wherein The data blanking information is shared between the serving cell and the interfering cell based on backhaul communication; and A downlink channel transmitted from the serving cell to the electronic device is scheduled in the area indicated by the data blanking information.

4. The method according to claim 1, wherein The data blanking information includes information about a region of a downlink channel transmitted by the interfering cell, in which no resources are allocated.

5. The method according to claim 1, wherein The data blank information includes: time domain information indicating subframe bursts to which the interfering cell has not allocated resources in the time domain; and Frequency domain information, which indicates: The location of the starting resource block, and The length of the resource block of the area to which the interfering cell does not allocate resources in the frequency domain.

6. The method according to claim 1, wherein The step of receiving the data whitespace information is based on radio resource control signaling, a downlink control indicator, or a medium access control control element.

7. A method of operating an electronic device, the method comprising: Sending user equipment capability information to the serving cell; receiving cell-specific reference signal blanking information for an interfering cell from the serving cell; detecting a timing difference between the serving cell and the interfering cell; identifying a cell-specific reference signal blank subframe based on the timing difference and the cell-specific reference signal blank information; as well as Interference is mitigated based on the cell-specific reference signal blank subframe.

8. The method according to claim 7, wherein: The serving cell corresponds to a non-terrestrial network cell; and The interfering cell corresponds to a terrestrial network cell.

9. The method according to claim 7, wherein: The cell-specific reference signal blanking information is shared between the serving cell and the interfering cell based on backhaul communication; and A cell-specific reference signal transmitted from the serving cell to the electronic device is scheduled in a region indicated by the cell-specific reference signal blanking information.

10. The method according to claim 7, wherein: The user equipment capability information includes information about a time domain unit, where the time domain unit represents one of a subframe, a frame, and a subframe burst.

11. The method according to claim 10, wherein: The cell-specific reference signal blanking information includes subframe bitmap information indicating at least one subframe to which no resources are allocated based on a time domain unit corresponding to the subframe.

12. The method according to claim 7, wherein: The step of receiving the cell-specific reference signal blanking information is based on radio resource control signaling, a downlink control indicator, or a medium access control control element.

13. The method according to claim 7, wherein: The cell-specific reference signal blank information includes: time domain information indicating subframes to which the interfering cell does not allocate cell-specific reference signal resources in the time domain; and Frequency domain information indicating resource blocks in a region to which the interfering cell does not allocate cell-specific reference signal resources in the frequency domain.

14. An electronic device comprising: processing circuitry configured to: Sending user equipment capability information to the serving cell, receiving cell-specific reference signal blanking information for an interfering cell from the serving cell, detecting a timing difference between the serving cell and the interfering cell, identifying a cell-specific reference signal blank subframe based on the timing difference and the cell-specific reference signal blank information, and Interference is mitigated based on the cell-specific reference signal blank subframe.

15. The electronic device according to claim 14, wherein: The serving cell corresponds to a non-terrestrial network cell; and The interfering cell corresponds to a terrestrial network cell.

16. The electronic device according to claim 14, wherein: The serving cell is configured as: sharing the cell-specific reference signal blanking information with the interfering cell based on backhaul communication; as well as Scheduling of a cell-specific reference signal transmitted from the serving cell to the electronic device is performed in a region indicated by the cell-specific reference signal blanking information.

17. The electronic device according to claim 14, wherein: The user equipment capability information includes information about a time domain unit, where the time domain unit represents one of a subframe, a frame, and a subframe burst.

18. The electronic device according to claim 17, wherein: The cell-specific reference signal blanking information includes subframe bitmap information indicating at least one subframe to which no resources are allocated based on a time domain unit corresponding to the subframe.

19. The electronic device according to claim 14, wherein: The step of receiving the cell-specific reference signal blanking information is based on radio resource control signaling, a downlink control indicator, or a medium access control control element.

20. The electronic device according to claim 14, wherein The cell-specific reference signal blank information includes: time domain information indicating subframes to which the interfering cell does not allocate cell-specific reference signal resources in the time domain; and Frequency domain information indicating resource blocks in a region to which the interfering cell does not allocate cell-specific reference signal resources in the frequency domain.

Images