System and method for MTC and NR coexistence

Abstract

Disclosed herein are systems and methods for facilitating coexistence between LTE-MTC (and / or NB-IoT) and NR systems. In one embodiment, an exemplary wireless communication method includes a first wireless communication device identifying a plurality of frequency domain resources allocated to the first wireless communication device. The method also includes the first wireless communication device determining whether one or more irrelevant subcarriers are located at a lower edge or an upper edge of the plurality of frequency domain resources, and the first wireless communication device processing data carried in the one or more irrelevant subcarriers based on the determination.

Description

Technical Field

[0001] The present disclosure generally relates to facilitating the coexistence of Machine Type Communication (MTC) systems (and / or Narrowband Internet of Things (NB-IoT) systems) with New Radio (NR) systems. Specifically, the present disclosure relates to reducing mutual interference when LTE-MTC carriers are deployed within NR carriers by using novel resource reservation techniques. Background Art

[0002] Machine-type communication (MTC), also known as machine-to-machine (M2M) and narrowband Internet of Things (NB-IoT), is a key application of the Internet of Things. Because LTE / LTE-A-based MTC and NB-IoT terminals have a lifespan of at least ten years, LTE / LTE-A-based MTC systems (referred to as LTE-MTC systems) or NB-IoT systems and new radio frequency (NR) systems are likely to coexist for many years. In situations where the coexisting systems have limited bandwidth, LTE-MTC / NB-IoT and NR systems cannot be allocated separate frequency domain regions within the coexisting system bandwidth. In this case, LTE-MTC carriers are deployed within NR carriers, meaning that the same frequency and / or time domain resources may need to be shared between LTE-MTC and NR systems. To ensure system performance when LTE-MTC / NB-IoT and NR systems coexist, mutual interference between the different systems must be reduced. To reduce coexistence interference, new resource reservation techniques, such as resource elements (REs) and symbols, are needed for shared resources in the frequency domain. Summary of the Invention

[0003] The exemplary embodiments disclosed herein are intended to solve problems associated with one or more of the problems presented in the prior art, as well as to provide additional features that will become apparent by reference to the following detailed description in conjunction with the accompanying drawings. According to various embodiments, example systems, methods, devices, and computer program products are disclosed herein. However, it should be understood that these embodiments are presented by way of example and not limitation, and it will be apparent to those skilled in the art who read this disclosure that various modifications may be made to the disclosed embodiments while remaining within the scope of this disclosure.

[0004] In one embodiment, an exemplary wireless communication method includes a first wireless communication device identifying a plurality of frequency domain resources allocated to the first wireless communication device, the method further including the first wireless communication device determining whether one or more outlying subcarriers are located at a lower edge or an upper edge of the plurality of frequency domain resources, and processing, by the first wireless communication device, data carried in the one or more outlying subcarriers based on the determination.

[0005] In another embodiment, a wireless communication method includes a wireless communication node determining, by a wireless communication node, that one or more irrelevant subcarriers are located at a lower edge or an upper edge of a frequency domain resource range allocated to a first wireless communication device, wherein the first wireless communication device determines, based on the determination, to puncture data carried on the one or more irrelevant subcarriers. The method also includes the wireless communication node transmitting, to the first wireless communication device, signaling information indicating the configuration of one or two irrelevant subcarriers and a control signal indicating resource allocation, wherein the resource allocation includes a range of frequency domain resources for the first wireless communication device.

[0006] In yet another embodiment, a wireless communication method includes configuring, by a wireless communication node, a first plurality of frequency domain resources including a lower edge and an upper edge for a first wireless communication system. The method also includes reserving, by the wireless communication node, a second plurality of frequency domain resources, wherein the second plurality of frequency domain resources are located at a lower edge, an upper edge, or both the lower edge and the upper edge of the first plurality of frequency domain resources of the first wireless communication system, and the second plurality of frequency domain resources are contiguous at the lower edge or the upper edge.

[0007] In one embodiment, a wireless communication method includes configuring, by a wireless communication node, a plurality of resource reservations having different granularities for a plurality of wireless communication devices. The method also includes the wireless communication node sending a control signal to a first one of the plurality of wireless communication devices, the control signal indicating whether the resource reservation for the first wireless communication device is valid.

[0008] In another embodiment, a wireless communication method includes receiving, by a first wireless communication device, a control signal indicating a plurality of resource reservations having different granularities. The method also includes the first wireless communication device identifying, based on the control signal, whether the resource reservation for the first wireless communication device is valid.

[0009] In yet another embodiment, a wireless communication method includes configuring, by a wireless communication node, a plurality of time-domain resource reservations having different granularities for a first wireless communication device. The method also includes selecting, by the wireless communication node, one of the time-domain resource reservations for the first wireless communication device in response to identifying an overlap between the time-domain resource reservations having different granularities based on a predefined rule.

[0010] In one embodiment, a wireless communication method includes receiving, by a wireless communication device, a reservation from a plurality of time-domain resource reservations having different granularities for a first wireless communication device, and in response to identifying an overlap between the time-domain resource reservations having different granularities for the first wireless communication device, the wireless communication device identifying, based on a predefined rule, a selection of one of the time-domain resource reservations.

[0011] In another embodiment, a wireless communication method includes a wireless communication node configuring each bit of a given bitmap to indicate a reservation of a plurality of symbols for a first wireless communication device, and the wireless communication node transmitting the positioning map to the first wireless communication device.

[0012] In yet another embodiment, a wireless communication method includes receiving a given bitmap by a first wireless communication device. The method also includes identifying, by the first wireless communication device, each bit of the given bitmap to correspond to a plurality of symbols reserved for a second wireless communication device.

[0013] These and other aspects and embodiments thereof are described in more detail in the drawings, the description, and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Various example embodiments of the present disclosure are described in detail below with reference to the following figures or accompanying drawings. The accompanying drawings are provided for illustrative purposes only and depict only example embodiments of the present disclosure to facilitate the reader's understanding of the present disclosure. Therefore, the accompanying drawings should not be construed as limiting the breadth, scope, or applicability of the present disclosure. It should be noted that for the sake of clarity and ease of illustration, these drawings are not necessarily drawn to scale.

[0015] Figure 1A An example of MTC and NR coexistence scenario according to an embodiment of the present disclosure is shown, where processing of irrelevant carriers is skipped by the MTC UE.

[0016] Figure 1B An example of MTC and NR coexistence scenario according to an embodiment of the present disclosure is shown, where irrelevant carriers are decoded by the MTC UE (i.e., not skipped).

[0017] Figure 2A Exemplary frequency domain resources reserved for an NR system according to some embodiments of the present disclosure are shown, where the NR system is at the lower edge of the frequency domain resources of an MTC system.

[0018] Figure 2B Exemplary frequency domain resources reserved for an NR system according to some embodiments of the present disclosure are shown, where the NR system is at the upper edge of the frequency domain resources of an MTC system.

[0019] Figure 2C Exemplary frequency domain resources reserved for an NR system at both the lower and upper edges of the frequency domain resources of an MTC system according to some embodiments of the present disclosure are shown.

[0020] Figure 3 Exemplary scenarios of different granularity levels of time domain resources allocated to MTC UEs are depicted.

[0021] Figure 4AExemplary predefined rules for determining resource allocation for an MTC UE in case of more than one granularity of time domain resources allocated to the MTC UE are shown.

[0022] Figure 4B Yet another exemplary predefined rule for determining resource allocation for an MTC UE in case of more than one granularity of time domain resources allocated to the MTC UE is shown.

[0023] Figure 5A An exemplary scenario for optimizing indication of downlink (DL) time domain resources allocated to an MTC UE is described.

[0024] Figure 5B An exemplary scenario for optimizing indication of uplink (UL) time domain resources allocated to an MTC UE is described.

[0025] Figure 6A Example embodiments for handling conflict avoidance between DMRS resource reservation and symbol-level resource reservation for UL NB-IoT are described.

[0026] Figure 6B Example embodiments for handling resource reservation for different subcarrier spacings are described.

[0027] Figure 6C Example embodiments for avoiding resource reservation conflicts for different subcarrier spacings are described. DETAILED DESCRIPTION

[0028] Various example embodiments of the present disclosure are described below with reference to the accompanying drawings to enable one of ordinary skill in the art to make and use the present disclosure. It will be apparent to one of ordinary skill in the art that, after reading this disclosure, various changes or modifications may be made to the examples described herein without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the example embodiments and applications described and illustrated herein. In addition, the specific order and / or hierarchy of steps in the methods disclosed herein are merely example methods. Based on design preferences, the specific order or hierarchy of steps of the disclosed methods or processes may be rearranged while remaining within the scope of the present disclosure. Therefore, one of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or actions in a sample order and, unless expressly stated otherwise, the present disclosure is not limited to the specific order or hierarchy presented.

[0029] It should be understood that the terms LTE-MTC and NB-IoT may be used interchangeably throughout the following disclosure.

[0030] Resource reservation in the frequency domain

[0031] Solution 1:

[0032] When LTE-MTC and NR systems coexist, the transmission of M subcarrier positions at each narrowband or every N narrowband edges of the LTE-MTC system is punctured, that is, the data transmission of M subcarrier positions is discarded. Depending on the configuration, M = 1 or 2. The edge of the narrowband can be the upper edge or lower edge of the narrowband, which is configured by signaling. When the position of the punctured subcarrier is at the edge of the LTE-MTC resource allocation, the LTE MTC UE does not decode the data at the punctured subcarrier position.

[0033] For LTE-MTC and NR coexistence, M=1 or 2 irrelevant subcarriers can be configured to be punctured according to narrowband or according to narrowband group or system bandwidth. If the irrelevant subcarrier is located at the edge of the allocated resources, the system (i.e., for the base station of the LTE-MTC system, not shown) will discard the data transmission in the irrelevant subcarrier (i.e., the transmission in the irrelevant subcarrier is punctured).

[0034] refer to Figure 1A , the DC subcarrier 105 is required in the LTE-MTC system, but not in the NR system. Due to the DC subcarrier 105, the narrowband 110 of the LTE-MTC system may be misaligned with the corresponding narrowband of the NR system. In different embodiments, the number of irrelevant subcarriers to be punctured in the primary resource blocks (PRBs) allocated by LTE-MTC in different frequency band sides may be different. The PRBs allocated in one frequency band side may have one more irrelevant subcarrier than the other side. In one embodiment, the number of irrelevant subcarriers below the DC subcarrier may be two, while the number of irrelevant subcarriers above the DC subcarrier may be one. In another embodiment, the number of irrelevant subcarriers below the DC subcarrier may be one, while the number of irrelevant subcarriers above the DC subcarrier may be two. In one embodiment, if the maximum number of irrelevant subcarriers to be punctured and the position with the maximum number of irrelevant subcarriers (above or below the DC subcarrier) are configured, the UE determines the number of subcarriers to be punctured based on the allocated PRBs (i.e., PRB indexes). In one embodiment, the LTE-MTC system transmits synchronization signals for downlink synchronization of UEs and transmits broadcast channels to indicate the system bandwidth to MTC UEs. In such an embodiment, the LTE-MTC UE calculates the position of the DC subcarrier by decoding the synchronization signal and the broadcast channel, and determines the lower edge and the upper edge based on the bandwidth.

[0035] Return Reference Figure 1A, system 100 allocates primary resource block (PRB) resources of PRBs 16, 17, and 18 to an LTE-MTC UE. According to the present disclosure, an LTE-MTC user equipment (UE) considers irrelevant subcarriers 125 on PRB 18 (reference numeral 120) to be punctured. Therefore, in one embodiment, LTE-MTC skips decoding data for punctured subcarriers at the edge, i.e., irrelevant subcarriers 125 of PRB 18 are not decoded. In an exemplary embodiment, irrelevant subcarriers 135 are also skipped from being decoded.

[0036] refer to Figure 1B In another embodiment, the location of the punctured subcarrier is in the middle of the LTE-MTC resource allocation. The location of the narrowband 160 and DC subcarrier 155 is in the middle of the LTE-MTC resource allocation. Figure 1B Zhongyu Figure 1A In a specific exemplary embodiment, the system 150 allocates PRB resources of PRBs 16, 17, 18, 19, and 20 to the LTE-MTC UE. Based on the configuration information, the LTE-MTC UE considers that the edge subcarriers on PRB 18 (reference numeral 170) in the figure are not punctured, and therefore decodes the data of the punctured subcarrier 175. Based on the LTE-MTC UE calculating from the configuration information that PRB 24 (reference numeral 180) is not in the middle of the PRBs allocated to the LTE-MTC UE, the LTE-MTC UE skips decoding the PRB 24 (reference numeral 180). Figure 1B Processing of the irrelevant subcarrier 185 in.

[0037] Solution 2:

[0038] To maximize resource utilization when deploying LTE-MTC within an NR carrier, according to the present disclosure, some contiguous frequency domain resources of the LTE-MTC system are reserved for NR use. The frequency domain resources reserved for the NR carrier are located at the lower edge, upper edge, or both the lower and upper edges of the LTE-MTC system, while LTE-MTC UEs can be scheduled in the middle frequency domain resources (the PRBs reserved for the LTE-MTC system are contiguous).

[0039] refer to Figure 2A , by allocating consecutive PRBs 210 to the LTE-MTC system (the consecutive PRBs 210 are different in the frequency domain from the PRBs 220 allocated to the NR system), conflicts between the frequency domain resources allocated to the LTE-MTC system and the NR system are avoided. The block of PRBs 215 (i.e., PRBs 0-9) is a subset of the PRBs 220 allocated to the NR system. The PRBs 220 allocated to the NR system are on the lower edge of the PRBs 210 allocated to the LTE-MTC system, thereby ensuring that there is no overlap or conflict in the frequency domain resources between the LTE-MTC system and the NR system.

[0040] Therefore, according to an embodiment of the present disclosure, the frequency domain resources 220 for the NR system can be configured as multiple PRBs at the lower edge of the frequency domain resources of the LTE-MTC system. This embodiment has the following advantages: by sending the number of LTE PRBs 215 at the edge of the LTE-MTC carrier configured for the NR UE in the signaling message, the overhead of the resources reserved for the NR system when communicating with the LTE-MTC system is reduced.

[0041] refer to Figure 2B In another embodiment of the present disclosure, conflicts between the frequency domain resources allocated to the LTE-MTC system and the NR system are avoided by allocating consecutive PRBs 230 to the LTE-MTC system (the consecutive PRBs 230 are different in the frequency domain from the PRBs 240 allocated to the NR system). The block of PRBs 245 (i.e., PRBs 39-49) is a subset of the PRBs 240 allocated to the NR system. The PRBs 240 allocated to the NR system are on the upper edge of the PRBs 230 allocated to the LTE-MTC system, thereby ensuring that there is no overlap or conflict in the frequency domain resources between the LTE-MTC system and the NR system.

[0042] Now refer to Figure 2C In yet another embodiment of the present disclosure, conflicts between frequency domain resources allocated to the LTE-MTC system and the NR system are avoided by allocating consecutive PRBs 270 to the LTE-MTC UE (the PRBs 270 being different in frequency domain from the PRBs 260 and 280 allocated to the NR system). Blocks of PRBs 277 (i.e., PRBs 0-9) and 279 (i.e., PRBs 39-49) are subsets of the PRBs 260 and 280 allocated to the NR system, respectively. The PRBs 260 allocated to the NR system are located at the lower edge of the PRBs 270 allocated to the LTE-MTC system, while the PRBs 280 allocated to the NR system are located at the upper edge of the PRBs 270 allocated to the LTE-MTC system, thereby ensuring that there is no overlap or conflict in frequency domain resources between the LTE-MTC system and the NR system.

[0043] The allocation unit of the frequency domain resources may be different from the PRB used as the frequency domain resource unit in the above embodiment. Figure 2A 、 2B and 2C, in some other embodiments, the frequency domain resource unit may be different from the PRB. For example, in some other embodiments, the frequency domain resource unit may be an MTC narrowband, and Figure 2A 、 2B The multiple MTC narrowbands 225, 245 and 275 in 2C can respectively indicate the units reserved for frequency domain resources for both LTE-MTC and NR systems in the signaling message.

[0044] Resource reservation in the time domain

[0045] Solution 3:

[0046] Semi-statically reserved LTE-MTC / NB-IoT resources are at the slot / symbol / subframe level in the time domain, and resource reservations with different granularity may overlap. According to the present disclosure, once semi-statically reserved LTE-MTC / NB-IoT resources are configured, the reserved resources may not be used by NR.

[0047] refer to Figure 3 In one embodiment, a subframe level 310 allocation may be semi-statically reserved for LTE-MTC UEs. In another embodiment, a slot level 320 allocation may be semi-statically reserved for LTE-MTC UEs. In yet another embodiment, a symbol level 330 allocation may be semi-statically reserved for LTE-MTC UEs.

[0048] To improve resource utilization in LTE-MTC / NB-IoT systems and address potential overlap between resource reservations of varying granularity, two bits in a DCI control signal can be used to dynamically indicate whether resource reservation should be applied and the granularity of resource reservation to be applied for scheduled LTE-MTC / NB-IoT transmissions. In one embodiment, the DCI control signal indicates whether resource reservation by a first wireless communication device is valid. The control signal then further indicates, if resource reservation is valid, which of multiple resource reservations of varying granularity should be applied to data transmissions by the first wireless communication device.

[0049] In one embodiment, the configuration of irrelevant subcarriers is carried in the system information by adding a new field. Symbol-level resource reservation and slot-level resource reservation can be indicated by system information or UE-specific RRC signaling. For example, in an exemplary embodiment, the DCI carries the signaling by adding a new 2-bit field to DCI format 6-0A or by using a reserved bit (if available). In another embodiment, the 2-bit information in the DCI is carried by reusing an existing (or unused) field in DCI format 6-0A.

[0050] Solution 4:

[0051] When the LTE-MTC system is semi-statically configured with resource reservation mode 1, resource reservation mode 2, ... resource reservation mode N, where N>=1, different resource reservation modes have different resource reservation granularities, such as subframe level, time slot level, or symbol level.

[0052] When resource reservations of different granularities overlap within the same resource, resource reservation is determined by predefined rules. For example, when slot-level resource reservations overlap with subframe-level resource reservations, slot-level resource reservations are applied. Another predefined rule could be: when symbol-level resource reservations overlap with subframe-level resource reservations, symbol-level resource reservations are applied. Yet another predefined rule could be: when symbol-level resource reservations overlap with slot-level resource reservations, symbol-level resource reservations are applied.

[0053] In one embodiment, when resource reservation patterns with different resource reservation granularities overlap on the same resource zone, resource reservation on the resource zone is determined according to one of the following predefined rules:

[0054] Rule 1: When resource reservation modes with different resource reservation granularities overlap on the same resource zone, the resource zone uses the resource reservation mode with the smaller resource reservation granularity. Figure 4A , depicting subframe level 410 reservation and slot level 420 reservation. In one exemplary embodiment, the final reservation selected by LTE-MTC is a slot level 430 reservation by applying the above-described rules.

[0055] Rule 2: When resource reservation modes with different resource reservation granularities overlap on the same resource zone, the resource zone uses the resource reservation mode with the larger resource reservation granularity. Figure 4B , depicting slot level 460 reservation and symbol level 470 reservation. In an exemplary embodiment, the final reservation selected by LTE-MTC is slot level 480 reservation to account for resource reservations of different granularities by applying the above rules.

[0056] Solution 5:

[0057] In order to reduce the indication overhead of resource reservation, for symbol-level resource reservation, one bit in a given bitmap may be used to indicate resource reservation for multiple consecutive symbols.

[0058] refer to Figure 5A For symbol-level resource reservation 510 for downlink (DL) LTE-MTC or NB-IoT, a 2-bit bitmap may be used to indicate resource reservation in a time slot 530, excluding the NRS symbol 520 that cannot be reserved. For example, the first bit in the bitmap indicates whether the first and second symbols are reserved, and the second bit in the bitmap indicates whether the third, fourth, and fifth symbols are reserved. Alternatively, the first bit in the bitmap indicates whether the first, second, and third symbols are reserved, and the second bit in the bitmap indicates whether the fourth and fifth symbols are reserved.

[0059] Now refer to Figure 5BFor symbol-level resource reservation in uplink (UL) LTE-MTC, a 2-bit bitmap may be used to indicate resource reservation in a time slot 580, excluding the DMRS symbol 570 that cannot be reserved. For example, the first bit in the bitmap indicates whether the first, second, and third symbols (symbols #0, #1, and #2) are reserved, and the second bit in the bitmap indicates whether the fifth, sixth, and seventh symbols (symbols #4, #5, and #6) are reserved. A 4-bit bitmap may be used to indicate resource reservation in a subframe 590. For example, the first bit in the bitmap indicates whether the first symbol, the second symbol, and the third symbol (symbols #0, #1, and #2) are reserved, and the second bit in the bitmap indicates whether the fifth symbol, the sixth symbol, and the seventh symbol (symbols #4, #5, and #6) are reserved, while the third bit in the bitmap indicates whether the eighth symbol, the ninth symbol, and the tenth symbol (symbols #7, #8, and #9) are reserved, and the second bit in the bitmap indicates whether the twelfth symbol, the thirteenth symbol, and the fourteenth symbol (symbols #11, #12, and #13) are reserved.

[0060] refer to Figure 5B According to another embodiment, for symbol-level resource reservation of uplink (UL) LTE-MTC, if a reserved UL symbol (e.g., 560) collides with a symbol 595 for a sounding transmission (if present, it is always located at the last symbol 595 of the subframe), the sounding transmission will have a higher priority. In such an embodiment, if the corresponding symbol is configured as a reserved symbol, the sounding signal will be transmitted.

[0061] In another embodiment, for uplink (UL) LTE-MTC symbol / slot / subframe level resource reservation, if the UL reserved resources conflict with the aperiodic sounding transmission, the aperiodic sounding transmission will have a higher priority. This means that if the corresponding symbol is configured as a UL reserved resource, the aperiodic sounding signal will be sent.

[0062] In yet another embodiment, for uplink (UL) LTE-MTC symbol / slot / subframe level resource reservation, if the UL reserved resource (e.g., 560) collides with the symbol 595 used for periodic sounding transmission, the periodic sounding transmission will have a lower priority. This means that if the corresponding symbol is configured as a UL reserved resource, the periodic sounding signal will be discarded.

[0063] Now refer to Figure 6A, for UL NB-IoT, in one embodiment of conflict handling and resource reservation for DMRS, for 15kHz subcarrier spacing, DMRS is located in the 4th symbol 610 of every 7 symbols, while for single-tone 3.75kHz subcarrier spacing, the DMRS symbol is the 5th symbol 620 of every 7 symbols in a 2ms NB-slot. For UL NB-IoT, the eNB cannot correctly decode data transmissions in time slots without DMRS. For symbol-level resource reservation, a DMRS symbol cannot be reserved if other symbols in the corresponding time slot are not reserved. For time slot-level reservation in UL NB-IoT, if a DMRS transmission is reserved for a timing slot, the DMRS transmission in that time slot is discarded.

[0064] In another embodiment, if the reserved symbols / time slots configured for 15 kHz subcarrier spacing overlap with DMRS transmissions with 3.75 kHz subcarrier spacing, the overlapping symbols are assumed to be unreserved. In another embodiment, if the reserved symbols / time slots configured for 15 kHz subcarrier spacing overlap with DMRS transmissions with 3.75 kHz subcarrier spacing, the 2 ms time slots where the DMRS with 3.75 kHz subcarrier spacing is located will be discarded.

[0065] refer to Figure 6B According to an exemplary embodiment for handling resource reservation for different subcarrier spacings, if the symbol-level / time slot resource reservation for the 15 kHz subcarrier spacing case and the symbol-level / time slot resource reservation for the 3.75 kHz subcarrier spacing case overlap, the symbol / time slot can be regarded as a reserved symbol / time slot only when the corresponding time regions 660 and 670 are reserved for the 15 kHz subcarrier spacing and the 3.75 kHz subcarrier spacing.

[0066] Now refer to Figure 6C In one embodiment of the present disclosure for avoiding resource reservation conflicts for different subcarrier spacings, if the resource reservation 685 at the reserved slot / subframe level for the 15 kHz subcarrier spacing case overlaps with the data transmission in the symbol 690 (non-DMRS symbol) for the 3.75 kHz subcarrier spacing case, it is assumed that the transmission in the overlapping symbol 690 for the 3.75 kHz subcarrier spacing is discarded.

[0067] In another embodiment, if the subframe-level resource reservation 685 configured for 15 kHz subcarrier spacing overlaps with the transmission in the symbol 690 (non-DMRS symbol) for 3.75 kHz subcarrier spacing, the transmission in the 2 ms time slot (NB-time slot, narrowband time slot, the length of such time slot is 2 ms) for the 3.75 kHz subcarrier corresponding to the overlapping symbol 690 is discarded.

[0068] Although various embodiments of the present disclosure have been described above, it should be understood that they are presented by way of example only and not by way of limitation. Similarly, various figures may depict example architectures or configurations, which are provided to enable those of ordinary skill in the art to understand the example features and functions of the present disclosure. However, these personnel will understand that the present disclosure is not limited to the example architectures or configurations described, but may be implemented using a variety of alternative architectures and configurations. In addition, as will be understood by those of ordinary skill in the art, one or more features of an embodiment may be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of the present disclosure should not be limited by any of the above-described illustrative embodiments.

[0069] It should also be understood that any reference to an element herein using designations such as "first," "second," etc., does not generally limit the quantity or order of those elements. Rather, these designations may be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to a first and a second element does not mean that only two elements are employed, or that the first element must precede the second element in some manner.

[0070] In addition, those skilled in the art will understand that any of a variety of different technologies and techniques may be used to represent information and signals. For example, references to data, instructions, commands, information, signals, bits, and symbols in the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0071] Those of ordinary skill in the art will also understand that any of the various illustrative logical blocks, modules, processors, devices, circuits, methods, and functions described in conjunction with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination thereof), firmware, various forms of program or design code incorporating instructions (for convenience, referred to herein as "software" or "software modules"), or any combination of these technologies. To clearly illustrate this interchangeability of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps have been generally described above in terms of their functionality. Whether such functionality is implemented as hardware, firmware, software, or a combination of these technologies depends on the specific application and the design constraints imposed on the overall system. A skilled person may implement the described functionality in various ways for each specific application, but such implementation decisions do not result in a departure from the scope of this disclosure.

[0072] In addition, it will be understood by those of ordinary skill in the art that the various illustrative logic blocks, modules, devices, components, and circuits described herein may be implemented within or performed by an integrated circuit (IC) including a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, or any combination thereof. The logic blocks, modules, and circuits may also include antennas and / or transceivers for communicating with various components within a network or within a device. The general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, or state machine. The processor may also be implemented as a combination of computing devices for performing the functions described herein, for example, a combination of a DSP and a microprocessor, a combination of multiple microprocessors, a combination of one or more microprocessors in conjunction with a DSP core, or a combination of any other suitable configuration.

[0073] If implemented in software, the functionality may be stored as one or more instructions or codes on a computer-readable medium. Thus, the steps of the methods or algorithms disclosed herein may be implemented as software stored on a computer-readable medium. Computer-readable media include both computer storage media and communication media, including any medium that enables a computer program or code to be transferred from one place to another. The storage medium may be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include: RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage device, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.

[0074] In addition, memory or other storage devices and communication components may be used in embodiments of the present disclosure. It will be understood that, for clarity, the above description has described embodiments of the present disclosure with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without departing from the present disclosure. For example, functionality described as being performed by a separate processing logic element or controller may be performed by the same processing logic element or controller. Therefore, reference to a specific functional unit is only a reference to a suitable device for providing the functionality, rather than an indication of a strict logical or physical structure or organization.

[0075] Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of this disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments shown herein, but should be accorded the widest scope consistent with the novel features and principles disclosed herein, as set forth in the claims below.

Claims

1. A wireless communication method, comprising: The wireless communication node determines the number of irrelevant subcarriers according to the relationship between the irrelevant subcarriers and the DC subcarrier in the frequency domain resources and sends the configuration of the relationship between the irrelevant subcarriers and the DC subcarrier in the frequency domain resources, wherein The relationship between the irrelevant subcarrier and the DC subcarrier in the frequency domain resource includes one of the following: The irrelevant subcarriers below the DC subcarrier in the frequency domain resource are 2, and the irrelevant subcarriers above the DC subcarrier are 1, or The irrelevant subcarrier below the DC subcarrier in the frequency domain resource is 1, and the irrelevant subcarrier above the DC subcarrier is 2; and wherein The configuration of the relationship between the irrelevant subcarrier and the DC subcarrier in the frequency domain resource is carried by system information, and The wireless communication node sends data according to the determined number of irrelevant subcarriers. 2 . The wireless communication method according to claim 1 , wherein when the irrelevant subcarrier is located at an edge of a frequency domain resource, data on the irrelevant subcarrier is punctured.

3. A wireless communication method, comprising: The wireless communication device determines the number of irrelevant subcarriers according to the configuration of the relationship between the received irrelevant subcarriers and the DC subcarrier in the frequency domain resources and the allocated frequency domain resources, wherein The relationship between the irrelevant subcarrier and the DC subcarrier in the frequency domain resource includes one of the following: The irrelevant subcarriers below the DC subcarrier in the frequency domain resource are 2, and the irrelevant subcarriers above the DC subcarrier are 1, or The irrelevant subcarrier below the DC subcarrier in the frequency domain resource is 1, and the irrelevant subcarrier above the DC subcarrier is 2; and wherein The configuration of the relationship between the irrelevant subcarrier and the DC subcarrier in the frequency domain resource is carried by system information, and The wireless communication device receives data according to the determined number of irrelevant subcarriers. 4 . The wireless communication method according to claim 3 , wherein when the irrelevant subcarrier is located at an edge of a frequency domain resource, data on the irrelevant subcarrier is punctured.

5. A wireless communication device, comprising: processor; and A memory storing executable instructions, which, when executed by the processor, cause the processor to perform the method according to any one of claims 1 to 4. 6 . A computer-readable storage medium storing instructions thereon, which, when executed by a processor, cause the processor to perform the method according to claim 1 .

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