Spectrum utilization for wireless communications

Abstract

Wireless communications may include improving the flexibility of spectrum utilization. Spectrum utilization may be improved by obtaining a flexible frequency band or a soft frequency band from a combination of multiple frequency bands. The combination may have frequency bands with the same or different types of duplex modes. Flexible or soft bands may be used in a single band operation, or by a single cell, although it is a combination of bands.

Description

Technical Field

[0001] This document generally relates to wireless communication. More specifically, in a mobile device communication system, there may be increased flexibility in spectrum utilization. Background Art

[0002] Wireless communication technologies are driving the world towards an increasingly interconnected and networked society. Wireless communication relies on efficient network resource management and allocation between user mobile stations and wireless access network nodes (including but not limited to wireless base stations). The new generation of networks is expected to provide high-speed, low-latency, and ultra-reliable communication capabilities and meet the requirements from different industries and users. User mobile stations or user equipment (UE) are becoming increasingly complex, and the amount of data transmitted is continuously increasing. Communication improvements should be made to improve communication, meet the reliability requirements of vertical industries, and support new generation network services. Summary of the Invention

[0003] This document relates to methods, systems, and devices for improving the flexibility of spectrum utilization. By obtaining a flexible band or a soft band from a combination of multiple bands, spectrum utilization can be improved. The combination can be bands with the same or different types of duplex modes. The flexible band or the soft band can be used for single-band operation or by a single cell, although it is a combination of bands. The combination of bands can refer to a combination of different frequencies.

[0004] In one embodiment, a method for wireless communication includes: obtaining soft frequency bands for wireless communication including a plurality of frequency bands; and operating the soft frequency bands according to single-frequency band operation. Each of the plurality of frequency bands includes one frequency band, and the soft frequency bands include a combination of frequency bands. The single-frequency band operation includes operation on the combination of frequency bands. The plurality of frequency bands includes a combination of different frequency bands. The combination includes a combination of a Time Division Duplex (TDD) frequency band and a Supplementary Uplink (SUL) frequency band. A single cell having an uplink (UL) carrier and a downlink (DL) carrier is configured based on the combination, and wherein the UL carrier is on the SUL frequency band and the DL carrier is on the TDD frequency band. A UL sub-band is supported in the cell, wherein the bandwidth of the UL sub-band is equal to the DL carrier, and wherein the UL sub-band is on the TDD frequency band. The combination includes a combination of a Time Division Duplex (TDD) frequency band and a Supplementary Downlink (SDL) frequency band. A single cell having a downlink (DL) carrier and an uplink (UL) carrier is configured based on the combination, and wherein the DL carrier is on the SDL frequency band and the UL carrier is on the TDD frequency band. A DL sub-band is supported in the cell, wherein the bandwidth of the DL sub-band is equal to the UL carrier, and wherein the DL sub-band is on the TDD frequency band. The combination includes a combination of a Frequency Division Duplex (FDD) frequency band and a Supplementary Uplink (SUL) frequency band. A single cell having an uplink (UL) carrier and a downlink (DL) carrier is configured based on the combination, and wherein the UL carrier includes discontinuous spectra from both the FDD frequency band and the SUL frequency band. The combination includes a combination of a Frequency Division Duplex (FDD) frequency band and a Supplementary Downlink (SDL) frequency band. A single cell having a downlink (DL) carrier and an uplink (UL) carrier is configured based on the combination, and wherein the DL carrier includes discontinuous spectra from both the FDD frequency band and the SDL frequency band. The combination includes a combination of a Time Division Duplex (TDD) frequency band and a Frequency Division Duplex (FDD) frequency band. A single cell having an uplink (UL) carrier and a downlink (DL) carrier is configured based on the combination, and a DL sub-band is supported in the UL carrier, and wherein the UL carrier is on both the FDD frequency band and the TDD frequency band, the DL carrier is on the FDD frequency band, and the DL sub-band is on the TDD frequency band. A single cell having a downlink (DL) carrier and an uplink (UL) carrier is configured based on the combination, and a UL sub-band is supported in the DL carrier, wherein the DL carrier is on both the FDD frequency band and the TDD frequency band, the UL carrier is on the FDD frequency band, and the UL sub-band is on the TDD frequency band. A single cell having one downlink (DL) carrier and two uplink (UL) carriers is configured based on the combination, and a DL sub-band is supported in one of the two UL carriers, wherein the bandwidth of the DL sub-band is equal to one of the two UL carriers, or the DL sub-band is supported in one of the two UL carriers having larger spectral resources.A single cell with two downlink (DL) carriers and one uplink (UL) carrier is based on this combined configuration, and the UL sub-band is supported in one of the two DL carriers, where the bandwidth of the UL sub-band is equal to one of the two DL carriers, or the UL sub-band is supported in one of the two DL carriers with larger spectral resources. The method includes using the gap between the FDD UL operating band and the FDD DL operating band as the TDD band; or using the overlap of multiple bands through sub-bands. The combination includes the combination of two time division duplex (TDD) bands. A single cell with an uplink (UL) carrier and a downlink (DL) carrier is based on this combined configuration, where the UL carrier is on one of the two bands, and the DL carrier is on the other of the two bands, or both the UL carrier and the DL carrier are on these two bands. At least one of the UL sub-band and the DL sub-band is supported in the cell, where the UL sub-band is supported on the DL carrier and the DL sub-band is supported on the UL carrier. A single cell with an uplink (UL) carrier and a downlink (DL) carrier is based on this combined configuration, where both the UL carrier and the DL carrier are on one of the two bands, and the other of the two bands is configured as a sub-band of at least one of the UL carrier and the DL carrier.

[0005] In one embodiment, a wireless communication device includes a processor and a memory, and the processor is configured to read code from the memory and implement any of the above embodiments.

[0006] In one embodiment, a computer program product includes computer-readable program medium code stored thereon, which, when executed by a processor, causes the processor to implement any of the above embodiments.

[0007] In some embodiments, there is a wireless communication device including a processor and a memory, where the processor is configured to read code from the memory and implement any method described in any of the embodiments. In some embodiments, a computer program product includes computer-readable program medium code stored thereon, which, when executed by a processor, causes the processor to implement any method described in any of the embodiments. The above and other aspects and their implementations are described in more detail in the drawings, the specification, and the claims. Description of the Drawings

[0008] Figure 1 An example base station is shown.

[0009] Figure 2 An example random access (RA) messaging environment is shown.

[0010] Figure 3 A block diagram showing an example configuration of a transceiver and an antenna is shown.

[0011] Figure 4 Shows a block diagram illustrating the relationship between carriers, frequency bands, and cells.

[0012] Figure 5 Shows the symbol / slot structure.

[0013] Figure 6 Shows a frequency band combination having a time division duplex (TDD) frequency band and a supplementary uplink (SUL) frequency band.

[0014] Figure 7 Shows a frequency band combination having a time division duplex (TDD) frequency band and a supplementary downlink (SDL) frequency band.

[0015] Figure 8 Shows a frequency band combination having a frequency division duplex (FDD) frequency band and a supplementary uplink (SUL) frequency band.

[0016] Figure 9 Shows a frequency band combination having a frequency division duplex (FDD) frequency band and a supplementary downlink (SDL) frequency band.

[0017] Figure 10a Shows an embodiment of a frequency band combination of a time division duplex (TDD) frequency band and a frequency division duplex (FDD) frequency band when the spectrum of the TDD frequency band is higher than the FDD DL operating frequency band.

[0018] Figure 10b Shows an embodiment of a frequency band combination of a time division duplex (TDD) frequency band and a frequency division duplex (FDD) frequency band when the spectrum of the TDD frequency band is lower than the FDD UL operating frequency band.

[0019] Figure 10c Shows an embodiment of a frequency band combination of a time division duplex (TDD) frequency band and a frequency division duplex (FDD) frequency band when the spectrum of the TDD frequency band is in the gap between the FDD UL operating frequency band and the FDD DL operating frequency band.

[0020] Figure 10d Shows an embodiment of a frequency band combination of a time division duplex (TDD) frequency band and a frequency division duplex (FDD) frequency band when the spectrum of the TDD frequency band includes the FDD UL or DL operating frequency band.

[0021] Figure 11 Shows a frequency band combination having two time division duplex (TDD) frequency bands.

[0022] Figure 12 Shows an embodiment of sub-band full duplex (SBFD) on two frequency bands. Detailed Description

[0023] The present disclosure will now be described in detail below with reference to the accompanying drawings, which form a part of the present disclosure and illustrate specific examples of embodiments in a schematic manner. However, it should be noted that the present disclosure can be embodied in various different forms, and thus, the subject matter covered or claimed is intended to be construed as not limited to any of the embodiments set forth below.

[0024] Throughout the specification and claims, terms may have nuances of meaning that are indicated or implied in the context beyond their explicitly expressed meaning. Similarly, the phrases "in one embodiment" or "in certain embodiments" used herein do not necessarily refer to the same embodiment, and the phrases "in another embodiment" or "in other embodiments" used herein do not necessarily refer to different embodiments. The phrases "in one implementation" or "in certain implementations" used herein do not necessarily refer to the same implementation, and the phrases "in another implementation" or "in other implementations" used herein do not necessarily refer to different implementations. For example, the claimed subject matter includes all or part of the combinations of the exemplary embodiments or implementations.

[0025] Generally speaking, terms can be at least partially understood from their use in the context. For example, terms such as "and", "or", "and / or" used herein can include various meanings, which may at least partially depend on the context in which such terms are used. Generally, "or" if used to relate a list such as A, B, or C is intended to mean A, B, and C, used in an inclusive sense herein, as well as A, B, or C, used in an exclusive sense herein. In addition, the term "one or more" or "at least one" used herein can be used to describe any feature, structure, or property in a singular sense or can be used to describe a combination of features, structures, or properties in a plural sense, at least partially depending on the context. Similarly, terms such as "a", "an", or "the" can also be understood to convey a singular usage or convey a plural usage at least partially depending on the context. In addition, the term "based on" or "determined by" can also be understood to not necessarily convey a set of exclusive factors, and instead, can allow for additional factors that are not necessarily explicitly described, at least partially depending on the context.

[0026] Radio Resource Control (RRC) is a protocol layer between the UE and the base station at the IP layer (network layer). There can be various Radio Resource Control (RRC) states, such as the RRC Connected (RRC_CONNECTED) state, the RRC Inactive (RRC_INACTIVE) state, and the RRC Idle (RRC_IDLE) state. RRC messages are transmitted via the Packet Data Convergence Protocol (PDCP). As described above, the UE can send data through the Random Access Channel (RACH) protocol scheme or the Configured Grant (CG) scheme. CG can be used to reduce the waste of periodically allocated resources by enabling multiple devices to share periodic resources. The base station or node can allocate CG resources to eliminate packet transmission delays and improve the utilization of the allocated periodic radio resources. The CG scheme may be just one example of communication protocol schemes and other examples include, but are not limited to, RACH. The wireless communication described herein can be via wireless access.

[0027] Improvements in wireless or mobile communication technologies have led to increased demands. Based on current development trends, systems are being developed to support the functions of enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communication (mMTC). Full duplex may be a requirement for 5G and subsequent communication systems. In wireless communication, a network device such as a User Equipment (UE) can perform uplink (UL) transmitter (Tx) switching between frequency bands. For multi-carrier operation, a network device that transmits using two transmitters (also known as a 2Tx user equipment) can transmit in two UL frequency bands. Which two frequency bands are used can be changed through radio resource control (RRC) reconfiguration.

[0028] Carrier Aggregation (CA) can be used in both 4G and 5G, as well as future communication systems. Multiple carriers or cells from one or more frequency bands can be configured to improve capabilities through user equipment (UE) capability sharing. UE capabilities are shared within a carrier / band / cell. Uplink (UL) transmission (Tx) switching is an example of UE capabilities shared between two frequency bands from one transmitter. If a carrier or a frequency band is not working at a certain moment or for a period / duration, sharing UE capabilities is allowed to improve communication. In another example, if some hardware or software can be shared between frequency bands or carriers, higher UE capabilities can be achieved for some UEs with less cost constraints. UE capability sharing is further described in the following embodiments.

[0029] In some wireless communication embodiments, uplink (UL) symbols or time slots can be configured / scheduled to send data or control information from a user equipment to a base station; and downlink (DL) symbols or time slots can be configured / scheduled to send data or control information from the base station to the UE. In one example, for a Time Division Duplex (TDD) carrier, DL symbols (or time slots) and UL symbols (or time slots) can be configured in a time division manner.

[0030] Operating frequency bands can be defined for network operators. The definition of a frequency band can include a frequency region and a duplex mode. The duplex mode can include Frequency Division Duplex (FDD), Time Division Duplex (TDD), Supplementary Downlink (SDL), and / or Supplementary Uplink (SUL). In some embodiments, there can be variable duplex FDD, and an FDD frequency band can be generated by a combination of an SUL frequency band and an SDL frequency band. For full duplex, non-overlapping sub-band full duplex can be considered, and at least one UL sub-band can be supported or configured within a TDD carrier. These combinations are described in the following embodiments to improve the flexibility of spectrum utilization. This can achieve the advantages of partial or all types of duplex modes, such as low latency, high peak rate, better coverage, and high reliability.

[0031] Figure 1 An example base station 102 is shown. A base station can also be referred to as a network device or a radio network node. In a mobile telecommunications environment, the base station 102 can also be identified as Node B (NB, such as eNB or gNB). An example base station can include wireless Tx / Rx circuitry 113 to receive and transmit with a user equipment (UE) 104. The base station can also include a network interface circuit 116 to couple the base station to a core network 110, such as an optical or wired interconnect, Ethernet, and / or other data transmission media / protocols.

[0032] The base station may further include system circuitry 122. The system circuitry 122 may include one or more processors 124 and / or a memory 126. The memory 126 may include operations 128 and control parameters 130. The operations 128 may include instructions for execution on one or more processors 124 to support the operation of the base station. For example, these operations may process random access transmission requests from multiple UEs. The control parameters 130 may include parameters or support the execution of the operations 128. For example, the control parameters may include network protocol settings, random access messaging format rules, bandwidth parameters, radio frequency mapping assignments, and / or other parameters.

[0033] In addition, signals transmitted between communication nodes in the system 100 may be characterized or defined as data signals or control signals. Generally, a data signal is a signal that includes or carries data (e.g., multimedia data (e.g., voice and / or image data)), and a control signal is a signal that carries control information that configures communication nodes in a particular manner to communicate with each other, or otherwise controls how communication nodes communicate data signals with each other. In addition, certain signals may be defined or characterized by a combination of data / control and uplink / downlink / sidelink, including uplink control signals, uplink data signals, downlink control signals, downlink data signals, sidelink control signals, and sidelink data signals. In addition, a particular signal may be characterized or defined as an uplink (UL) signal, a downlink (DL) signal, or a sidelink (SL) signal. An uplink signal is a signal transmitted from the UE 104 to the base station 102. A downlink signal is a signal transmitted from the base station 102 to the UE 104. A sidelink signal is a signal transmitted from one UE 104 to another UE.

[0034] For at least some specifications, such as 5G New Radio (NR), data and control signals are sent and / or carried on physical channels. Generally, a physical channel corresponds to a set of time-frequency resources for the transmission of signals. Different types of physical channels can be used to send different types of signals. For example, a physical data channel (or just data channel) (also referred to herein as a traffic channel) is used to send data signals, and a physical control channel (or just control channel) is used to send control signals. Example types of traffic channels (or physical data channels) include, but are not limited to, the physical downlink shared channel (PDSCH) for transmitting downlink data signals, the physical uplink shared channel (PUSCH) for transmitting uplink data signals, and the physical sidelink shared channel (PSSCH) for transmitting sidelink data signals. In addition, example types of physical control channels include, but are not limited to, the physical downlink control channel (PDCCH) for transmitting downlink control signals, the physical uplink control channel (PUCCH) for transmitting uplink control signals, and the physical sidelink control channel (PSCCH) for transmitting sidelink control signals. For simplicity, as used herein, unless otherwise specified, a particular type of physical channel is also used to refer to the signals sent on that particular type of physical channel and / or the transmissions on a particular type of transmission. By way of illustration, PDSCH refers to the physical downlink shared channel itself, the downlink data signals sent on the PDSCH, or downlink data transmissions. Thus, a communication node that sends or receives a PDSCH means that the communication node is sending or receiving signals on the PDSCH.

[0035] In addition, for at least some specifications (such as 5G NR) and / or for at least some types of control signals, the control signals sent by a communication node may include control information that includes information required to enable the transmission of one or more data signals between communication nodes and / or to schedule one or more data channels (or one or more transmissions on a data channel). For example, such control information may include information required for the correct reception, decoding, and demodulation of data signals received on a physical data channel during data transmission, and / or information required for uplink scheduling authorization that notifies a user equipment of resources and a transmission format for uplink data transmission. In some embodiments, the control information includes downlink control information (DCI) sent from base station 102 to UE 104 in the downlink direction. In other embodiments, the control information includes uplink control information (UCI) sent from UE 104 to base station 102 in the uplink direction, or sidelink control information (SCI) sent from one UE 104 to another UE 104 in the sidelink direction.

[0036] In addition, in some embodiments, UE 104 may be configured to support at least one UL parallel transmission mode across a pair of frequency bands for UL transmission. In a first UL parallel transmission mode (also referred to as a switched UL mode), UE 104 does not support UL parallel transmission across a frequency band pair. Thus, when UE 104 sends a UL transmission in the first UL parallel transmission mode, UE 104 sends the UL transmission without sending it in parallel across the frequency band pair. In addition, in a second UL parallel transmission mode (also referred to as a dual UL mode), UE 104 supports UL parallel transmission across a frequency band pair. Thus, when UE 104 sends a UL transmission in the second UL parallel transmission mode, UE 104 may send the UL transmission by sending it in parallel across the frequency band pair.

[0037] In addition, in some embodiments, the UE 104 may report to the base station 102 one or more UL parallel transmission modes. That is, the UE 104 may report to the base station 102 that it supports UL parallel transmission for cross-band pairs, that it does not support UL parallel transmission for cross-band pairs, or that it both supports and does not support UL parallel transmission for cross-band pairs. In particular, in these embodiments, the UE 104 may report whether it supports UL parallel transmission for cross-band pairs for each band combination (BC). In addition, the base station 102 may configure the UL parallel transmission mode (e.g., switched UL or dual UL) for each cell group, which may be considered per BC or per band pair in embodiments where the 2Tx user equipment supports only two bands. That is, one available band pair in the band combination may support one UL parallel transmission mode.

[0038] In addition, generally as used herein, a band combination may include multiple bands (e.g., five bands). In addition, as used herein, a band group may include up to three or four bands. A given band group may be included in or be part of a band combination. In addition, the band combination and / or the band group may include at least one band pair, where a band pair includes two bands.

[0039] Figure 2 An example random access messaging environment 200 is shown. In the random access messaging environment, the UE 104 may communicate with the base station 102 via a random access channel 252. In this example, the UE 104 supports one or more Subscriber Identity Modules (SIMs), such as SIM1 202. The electrical and physical interface 206 connects the SIM1 202 to the rest of the user equipment hardware, for example, via a system bus 210.

[0040] The mobile device 200 includes a communication interface 212, system logic 214, and a user interface 218. The system logic 214 can include any combination of hardware, software, firmware, or other logic. The system logic 214 can be implemented, for example, using one or more system on a chip (SoC), application specific integrated circuit (ASIC), discrete analog and digital circuits, and other circuits. The system logic 214 is part of the implementation of any desired functionality in the UE 104. In this regard, the system logic 214 can include, for example, logic to facilitate the following operations: decoding and playing music and videos, such as MP3, MP4, MPEG, AVI, FLAC, AC3, or WAV decoding and playback; running applications; accepting user input; saving and retrieving application data; establishing, maintaining, and terminating cellular phone calls or data connections (e.g., Internet connections); establishing, maintaining, and terminating wireless network connections, Bluetooth connections, or other connections; and displaying relevant information on the user interface 218. The user interface 218 and input 228 can include a graphical user interface, a touch-sensitive display, haptic feedback or other haptic output, voice or face recognition input, buttons, switches, speakers, and other user interface elements. Other examples of the input 228 include a microphone, video and still image cameras, temperature sensors, vibration sensors, rotation and orientation sensors, headphone and microphone input / output jacks, Universal Serial Bus (USB) connectors, memory card slots, radiation sensors (e.g., IR sensors), and other types of input.

[0041] The system logic 214 can include one or more processors 216 and a memory 220. The memory 220 stores control instructions 222 that are executed by the processor 216, for example, to implement the desired functionality of the UE 104. Control parameters 224 provide and specify configuration and operation options for the control instructions 222. The memory 220 can also store any BT, WiFi, 3G, 4G, 5G, or other data 226 that the UE 104 will send or has received via the communication interface 212. In various embodiments, system power can be provided by a power storage device such as a battery 282.

[0042] In communication interface 212, radio frequency (RF) transmit (Tx) and receive (Rx) circuitry 230 processes the transmission and reception of signals via one or more antennas 232. Communication interface 212 may include one or more transceivers. A transceiver may be a wireless transceiver that includes modulation / demodulation circuitry, digital to analog converter (DAC), shaping table, analog to digital converter (ADC), filters, waveform shapers, filters, preamplifiers, power amplifiers, and / or other logic for transmission and reception via one or more antennas or (for some devices) via a physical (e.g., wired) medium.

[0043] The signals transmitted and received may follow any one of a variety of formats, protocols, modulations (e.g., QPSK, 16-QAM, 64-QAM, or 256-QAM), frequency channels, bit rates, and coding arrays. As a specific example, communication interface 212 may include transceivers that support transmission and reception under 2G, 3G, BT, WiFi, Universal Mobile Telecommunications System (UMTS), High Speed Packet Access (HSPA)+, and 4G / Long Term Evolution (LTE) standards. However, the techniques described below are applicable to other wireless communication technologies, whether from the 3rd Generation Partnership Project (3GPP), GSM Association, 3GPP2, IEEE, or other partners or standards bodies.

[0044] Multiple RAN nodes (e.g., eNB, gNB) of the same or different radio access technologies (RATs) can be deployed in the same or different frequency carriers in certain geographical areas, and they can cooperate with each other via dual-connectivity operation to provide joint communication services for one or more same target UEs. The multi-RAT dual connectivity (MR-DC) architecture can have a non-collocated master node (MN) and a secondary node (SN). The Access Mobility Function (AMF) and the Session Management Function (SMF) can be control-plane entities, and the User Plane Function (UPF) is a user-plane entity in the New Radio (NR) or 5GC.

[0045] Figure 3 A block diagram showing an example configuration of the transceiver 212 and the antenna 232 is shown. Specifically, the transceiver 212 includes a first transmitter (Tx) (or transmitter circuit) 302(1) and a second transmitter (Tx) (or transmitter circuit) 302(2). In addition, the antenna 232 can include a first antenna assembly 304(1) and a second antenna assembly 304(2). Generally, the first transmitter 302(1) and the first antenna assembly 304(1) can form a first transmitter channel or chain, and the second transmitter 302(2) and the second antenna assembly 304(2) can form a second transmitter channel or chain. The UE 104 with Figure 2 the configuration in can be configured to use the first transmitter channel to send a first UL transmission (or the first part of the UL transmission), and can be configured to use the first transmitter channel to send a second UL transmission (or the second part of the UL transmission).

[0046] In some embodiments, UE 104 may transmit on one or two frequency bands or carriers using two transmitter channels. UE 104 may do so in any of a variety of ways. For example, UE 104 may transmit on a single carrier using both a first transmit channel and a second transmit channel. As another example, UE 104 may transmit on a first carrier using a first transmit channel and on a second carrier using a second transmit channel. As used herein, the terms "1Tx" and "1T" refer to transmitting on one carrier using one channel, and the terms "2Tx" and "2T" refer to transmitting on one carrier using two transmit channels. Additionally, as used herein, the phrase "UL transmission scenario" refers to a particular configuration of transmit channels for UL transmission on one or more carriers. Additionally, as described in further detail below, UE 104 may switch between UL transmission scenarios during a UL Tx switching operation.

[0047] Furthermore, in various embodiments, UE 104 may perform UL transmitter (Tx) switching to perform UL transmission. Generally, UE 104 may perform UL Tx switching by switching from one UL transmission scenario to another UL transmission scenario. In operation, UE 104 may transmit a UL transmission according to a first UL transmission scenario, and then may switch from the first UL transmission scenario to a second UL transmission scenario and transmit a UL transmission according to the second UL transmission scenario. Additionally, in various embodiments, the UL transmission scenario may also identify the number of antenna ports corresponding to a carrier. This identification may be in the form of a mapping between the carrier and the corresponding number of antenna ports. For at least some of these embodiments, the number of antennas may depend on whether UE 104 supports parallel transmission across a frequency band pair.

[0048] Figure 4 A block diagram showing the relationship between carriers, frequency bands, and cells is shown. The UE may be configured with two frequency bands for TX switching. The New Radio (NR) structure may be designed to operate in the operating frequency bands defined for FR1 and FR2. For example, several frequency bands in FR1 are as shown in Table 1 below, which has corresponding frequency regions and duplex modes.

[0049] Table 1 Operating Frequency Bands

[0050]

[0051] For sub-band full duplex (SBFD), the uplink (UL) sub-band can be supported or configured within the downlink time slot / symbol in a TDD carrier. Based on Rel-16 variable duplex, n91 can be generated by the combination of SUL n82 and SDL n76. As described herein, there can be soft bands or flexible bands, which are combinations of one or more bands with the same or different types of duplex modes. The combined embodiments can even be used in single-band operation.

[0052] Figure 5 The symbol / slot structure is shown. The example shown is DDDSU (501, 502, 503, 504, and 505). In this example, D represents a DL symbol / slot, U represents a UL symbol / slot, and S represents a flexible symbol / slot containing both DL and UL symbols. As shown, the UL time slots are fewer and discontinuous, and their characteristics affect the performance of UL transmission. In some embodiments, the full-duplex technology based on the UL sub-band can be implemented as sub-band full duplex (SBFD). Figure 5 A configuration mode of the UL sub-band is shown, where the UL sub-band 510 is configured within the DL symbol / slot. In some embodiments, the UL sub-band can be configured in some or all of the DL symbols / slots.

[0053] The embodiments described below show various combinations of bands as a single flexible band or soft band. For simplicity, the resulting band can be referred to as a soft band, but includes combinations of bands (including for single-band operation), and can also be referred to as a flexible band or combined band. As mentioned above, the reference to a combined band can include single-band operation.

[0054] Combination of TDD and SUL

[0055] Figure 6 A band combination with a time division duplex (TDD) band and a supplementary uplink (SUL) band is shown. In this embodiment, the combination of the TDD band and the SUL band is performed as single-band operation, rather than as two carriers on two bands. This combination results in a soft band or flexible band, where for the cell operating on this band, there is only one downlink (DL) carrier and one uplink (UL) carrier.

[0056] In some embodiments, a flexible / soft band can be operated by a single cell. A single cell can include a UL carrier and a UL sub-band. The bandwidth of the UL sub-band can be equal to the TDD DL carrier. There can be variable TDD bands where the UL sub-band is supported and the UL sub-band is equal to the DL carrier bandwidth. In some embodiments, a single cell can include a soft UL carrier, which includes discontinuous frequency resources from the SUL band and the TDD band, optionally represented by one or more bandwidth parts (BWPs).

[0057] The flexible / soft band includes both UL and DL operating bands. The DL operating band can be configured with UL time slots / symbols or UL sub-bands. The UL carrier can be located on the UL operating band, and the DL carrier and UL sub-band can be located on the DL operating band. The spectra of the UL operating band and DL operating band can be different.

[0058] In this embodiment, the flexible / soft band is obtained by a combination of a TDD band and an SUL band, which can provide higher system spectral efficiency compared to traditional TDD, where both UL coverage and capabilities can be improved.

[0059] Combination of TDD and SDL

[0060] Figure 7 Shows a band combination having a time division duplex (TDD) band and a supplementary downlink (SDL) band. In this embodiment, the combination of the TDD band and the SDL band is performed as a single-band operation rather than as two carriers on two bands. This combination obtains a soft band or a flexible band, where for a cell operating on this band, there is only one downlink (DL) carrier and one uplink (UL) carrier.

[0061] In some embodiments, the flexible / soft band can be operated by a single cell. The single cell can include a DL carrier and a DL sub-band. The bandwidth of the DL sub-band can be equal to the TDD UL carrier. There can be a variable TDD band where the DL sub-band is supported and the DL sub-band is equal to the UL carrier bandwidth. In some embodiments, the single cell can include a soft DL carrier, which includes non-contiguous frequency resources from the SDL band and the TDD band, optionally represented by one BWP or multiple BWPs.

[0062] The flexible / soft band includes both UL and DL operating bands. The UL operating band can be configured with DL time slots / symbols or DL sub-bands. The UL carrier and DL sub-band can be located on the UL operating band. The DL carrier can be located on the DL operating band. The spectra of the UL operating band and DL operating band can be different.

[0063] In this embodiment, the flexible / soft band is obtained by a combination of a TDD band and an SDL band, which can provide higher system spectral efficiency compared to a TDD system and can provide an advantage when DL traffic is heavy.

[0064] Combination of FDD and SUL

[0065] Figure 8Shows a band combination having a Frequency Division Duplex (FDD) band and a Supplementary Uplink (SUL) band. In this embodiment, the combination of the FDD band and the SUL band is performed according to single-band operation, rather than as two carriers on two bands. This combination obtains a soft band or a flexible band, where for a cell operating on this band, there is only one Downlink (DL) carrier and one Uplink (UL) carrier.

[0066] In some embodiments, the flexible / soft band can be operated by a single cell. The single cell can include a discontinuous UL operating band, or can be obtained by combining multiple UL operating bands. The UL carrier or UL BWP can be located on the UL operating band and can support discontinuous frequency resources. In some embodiments, there can be a variable FDD band having discontinuous frequency resources with UL BWP support. In some embodiments, the single cell can include a soft UL carrier that includes discontinuous frequency resources from the SUL band and the FDD band, optionally represented by one BWP or multiple BWPs.

[0067] The flexible / soft band includes both UL and DL operating bands. The UL operating band can be configured as a discontinuous UL operating band, or can be obtained by combining multiple UL operating bands. The UL carrier or UL BWP can be located on the UL operating band and can support discontinuous frequency resources. The spectra of the UL operating band and the DL operating band can be different.

[0068] In this embodiment, the flexible / soft band is obtained by the combination of the FDD band and the SUL band, which can provide higher system spectral efficiency compared to other FDDs, and can improve both UL coverage and capacity.

[0069] Combination of FDD and SDL

[0070] Figure 9 Shows a band combination having a Frequency Division Duplex (FDD) band and a Supplementary Downlink (SDL) band. In this embodiment, the combination of the FDD band and the SDL band is performed according to single-band operation, rather than as two carriers on two bands. This combination obtains a soft band or a flexible band, where for a cell operating on this band, there is only one Downlink (DL) carrier and one Uplink (UL) carrier.

[0071] In some embodiments, the flexible / soft band may be operated by one cell. A single cell may include a non-contiguous DL carrier, wherein the spectrum of the DL carrier includes a non-contiguous DL operating band or multiple DL operating bands. A DL carrier or DL ​​BWP may be located on a DL operating band and may support non-contiguous frequency resources. In some embodiments, a single cell may include a soft DL carrier, which includes non-contiguous frequency resources from an SDL band and an FDD band, optionally represented by one BWP or multiple BWPs.

[0072] Flexible / soft bands include both UL and DL operating bands. The DL operating band can be configured as a non-contiguous UL operating band or obtained by combining multiple DL operating bands. A DL carrier or DL ​​BWP can be located on a DL operating band and can support non-contiguous frequency resources. The spectrum of the UL operating band and the DL operating band can be different.

[0073] In this embodiment, the flexible / soft frequency band is obtained by combining the FDD frequency band and the SDL frequency band, which can provide higher system spectrum efficiency compared with the FDD system and can provide advantages when the DL traffic is busy.

[0074] Combination of FDD and TDD

[0075] The combination of FDD and TDD can still operate as a single cell.The embodiments described below include single cell operation with a combination of FDD and TDD frequency bands.

[0076] In one embodiment, there may be a combination of TDD bands and FDD UL operating bands. This may be similar to Figure 6 Operation of a combination of TDD bands and SUL bands as shown and described above. In this embodiment, the combination of TDD bands and FDD UL operating bands is performed as a single band operation, rather than as two carriers on two bands. The combination obtains a soft band or a flexible band, wherein, for a cell operating on the band, there is only one downlink (DL) carrier and one uplink (UL) carrier. A flexible / soft band can be operated by one cell. A single cell may include an UL carrier and an UL subband. The bandwidth of the UL subband may be equal to the TDD DL carrier. There may be a variable TDD band, wherein the UL subband is supported and the UL subband is equal to the DL carrier bandwidth. The UL carrier may be located on the UL operating band, and the DL carrier and the UL subband may be located on the DL operating band. The spectrum of the UL operating band and the DL operating band may be different. In this embodiment, the flexible / soft band is obtained by a combination of the TDD band and the FDD UL operating band, which can provide higher system spectrum efficiency compared to a TDD or FDD system, wherein both UL coverage and capacity are improved.

[0077] In another embodiment, a combination of a TDD band and an FDD DL operating band may exist. This may be similar to the operation of the combination of the TDD band and the SDL band as shown and described above. In this embodiment, the combination of the TDD band and the FDD DL operating band is performed as single-band operation, rather than as two carriers on two bands. This combination results in a soft band or a flexible band, where for a cell operating on this band, there is only one downlink (DL) carrier and one uplink (UL) carrier. The flexible / soft band may be operated by one cell. A single cell may include a DL carrier and a DL sub-band. The bandwidth of the DL sub-band may be equal to the TDD UL carrier. The flexible / soft band includes both UL and DL operating bands. The UL operating band may be configured with DL time slots / symbols or DL sub-bands. The UL carrier and the DL sub-band may be located on the UL operating band. The DL carrier may be located on the DL operating band. The spectra of the UL operating band and the DL operating band may be different. In this embodiment, the flexible / soft band is obtained by the combination of the TDD band and the FDD DL operating band, which may provide higher system spectral efficiency compared to TDD or FDD systems and may provide an advantage when DL traffic is heavy. Figure 7

[0078] Figures 10a - 10d Alternative embodiments showing a combination of a TDD band and an FDD band are shown. In these embodiments, the combination of the TDD band and the FDD band is performed as single-band operation, rather than as two carriers on two bands, or is performed only when the spectrum of the TDD band is higher than the FDD DL operating band. This combination results in a soft band or a flexible band, where for a cell operating on this band, there is only one downlink (DL) carrier and one uplink (UL) carrier.

[0079] Figure 10a An embodiment of the band combination of a time-division duplex (TDD) band and a frequency-division duplex (FDD) band is shown when the spectrum of the TDD band is higher than the FDD DL operating band.

[0080] In some embodiments, a single cell includes a DL carrier and a UL carrier, where a DL (or UL) sub-band is supported / configured in the UL (or DL) carrier. There may be a variable FDD band having a DL BWP and / or a UL BWP that supports discontinuous frequency resources. In some embodiments, a single cell may include a soft UL or DL carrier that includes discontinuous frequency resources from the TDD band and the FDD band, optionally represented by one BWP or multiple BWPs.

[0081] ​In some embodiments, a single cell includes one DL carrier and two UL carriers (or two DL carriers and one UL carrier), where the DL (or UL) sub-band is located in one of the two UL (or DL) carriers. The bandwidth of the DL (or UL) sub-band can be equal to the UL (or DL) carrier configured / supported with the DL (or UL) sub-band. There can be variable FDD bands with DL BWPs and / or UL BWPs that support discontinuous frequency resources. One BWP can be used with some or all of the frequency resources of two carriers.

[0082] Figure 10b An embodiment of the band combination of a time-division duplex (TDD) band and a frequency-division duplex (FDD) band is shown when the spectrum of the TDD band is lower than the FDD UL operating band.

[0083] In some embodiments, a single cell includes a DL carrier and a UL carrier, where the DL (or UL) sub-band is supported / configured in the UL (or DL) carrier. There can be variable FDD bands with DL BWPs and / or UL BWPs that support discontinuous frequency resources.

[0084] In some embodiments, a single cell includes one DL carrier and two UL carriers (or two DL carriers and one UL carrier), where the DL (or UL) sub-band is located in one of the two UL (or DL) carriers. The bandwidth of the DL (or UL) sub-band can be equal to the UL (or DL) carrier configured / supported with the DL (or UL) sub-band. There can be variable FDD bands with DL BWPs and / or UL BWPs that support discontinuous frequency resources. One BWP can be used with some or all of the frequency resources of two carriers.

[0085] Figure 10c An embodiment of the band combination of a time-division duplex (TDD) band and a frequency-division duplex (FDD) band is shown when the spectrum of the TDD band is in the gap between the FDD UL operating band and the FDD DL operating band.

[0086] In some embodiments, a single cell includes a DL carrier and a UL carrier, where the DL (or UL) sub-band is supported / configured in the UL (or DL) carrier. There can be variable FDD bands with DL BWPs and / or UL BWPs that support discontinuous frequency resources.

[0087] In some embodiments, a single cell includes one DL carrier and two UL carriers (or two DL carriers and one UL carrier), where the DL (or UL) sub-band is located in one of the two UL (or DL) carriers. The bandwidth of the DL (or UL) sub-band can be equal to the UL (or DL) carrier configured / supported with the DL (or UL) sub-band. There can be variable FDD bands with DL BWPs and / or UL BWPs that support discontinuous frequency resources. One BWP can be used with some or all of the frequency resources of two carriers.

[0088] In some embodiments, the gap between the FDD UL operating band and the DL operating band or the overlapping operating band of the SBFD can be used to achieve more flexible band utilization. The flexible / soft band can include UL and DL operating bands. The DL (or UL) operating band can be a discontinuous DL (or UL) operating band, or can be obtained by combining multiple DL (or UL) operating bands. The DL (or UL) carrier or DL (or UL) BWP can be located on the DL (or UL) operating band and can support discontinuous frequency resources. The spectra of the UL operating band and the DL operating band can be the same or different. By utilizing the gap of the FDD band or the overlapping DL / UL operating band, a flexible / soft band is obtained by the combination of the FDD band and the TDD band, which has a higher system spectral efficiency compared to the traditional combination.

[0089] Figure 10d Embodiments of a band combination with a time-division duplex (TDD) band and a frequency-division duplex (FDD) band are shown when the spectrum of the TDD band includes the FDD UL or DL operating band.

[0090] In some embodiments, the gap between the FDD UL operating band and the DL operating band or the overlapping operating band of the SBFD can be used to achieve more flexible band utilization. The flexible / soft band can include UL and DL operating bands. The DL (or UL) operating band can be a discontinuous DL (or UL) operating band, or can be obtained by combining multiple DL (or UL) operating bands. The DL (or UL) carrier or DL (or UL) BWP can be located on the DL (or UL) operating band and can support discontinuous frequency resources. The spectra of the UL operating band and the DL operating band can be the same or different. By utilizing the gap of the FDD band or the overlapping DL / UL operating band, a flexible / soft band is obtained by the combination of the FDD band and the TDD band, which has a higher system spectral efficiency compared to the traditional combination.

[0091] In some embodiments, a single cell includes two DL carriers and one UL carrier, where the UL sub-band is located in one of the DL carriers with larger spectral resources. There may be variable FDD bands with DL BWPs that support discontinuous frequency resources. One BWP can be used with partial or all of the frequency resources of two carriers.

[0092] Combination of TDD with TDD

[0093] Figure 11 A band combination with two time-division duplex (TDD) bands is shown. The combination of one TDD band with another TDD band can still operate according to single-cell operation. The embodiments described below include single-cell operation with a combination of two TDD bands, rather than being performed as two carriers on two bands. This combination obtains a soft band or a flexible band, where for a cell operating on this band, there is only one downlink (DL) carrier and one uplink (UL) carrier.

[0094] In some embodiments, a flexible / soft band can be operated by a cell that includes a DL carrier and a UL carrier, as well as a UL sub-band and a DL sub-band. The bandwidth of the DL sub-band can be equal to the UL carrier. The bandwidth of the UL sub-band can be equal to the DL carrier. There may be variable FDD bands where the DL sub-band is supported and equal to the UL carrier bandwidth, and the UL sub-band is supported and equal to the DL carrier bandwidth. In some embodiments, the flexible / soft band can be variable FDD and include UL and DL operating bands. The UL operating band can be configured with DL time slots / symbols or a DL sub-band, and the DL operating band can be configured with UL time slots / symbols or a UL sub-band. The UL carrier and the DL sub-band can be located on the UL operating band, and the DL carrier and the UL sub-band can be located on the DL operating band. The spectra of the UL operating band and the DL operating band can be different. The bandwidth of the DL sub-band can be equal to the UL carrier. The bandwidth of the UL sub-band can be equal to the DL carrier.

[0095] In some embodiments, a carrier / band can be configured as sub-band full duplex (SBFD) for another carrier / band. A single carrier in a flexible / soft band can include two TDD bands, where the second TDD band is configured as SBFD in the carrier of the first band. This can be achieved by BWP-based SBFD. This can be achieved through two BWP operations, and a single TDD carrier is an aggregated carrier of two bands, or can be achieved by a BWP configured for one TDD band and an SBFD correspondingly configured for another TDD band outside the BWP. The flexible / soft band can be a variable TDD that configures and supports both UL bands and DL sub-bands. The DL sub-band and the UL sub-band are configured outside the TDD carrier. The flexible / soft band is obtained by the combination of a TDD band and another TDD band. Compared with only TDD, higher system spectral efficiency can be obtained, and the latency of both DL traffic and UL traffic may be lower. In some embodiments, a single cell can include at least one of a soft UL carrier and a soft DL carrier, which includes discontinuous frequency resources from two TDD bands, optionally represented by one BWP or multiple BWPs.

[0096] In addition, the above embodiments can be used in the idle state, and cell management can be simplified by single cell operation.

[0097] There can be embodiments with a single band or multiple bands. To use the duplexer more effectively, duplexer sharing within a single band or multiple bands for sub-band full duplex (SBFD) can be supported. For SBFD in a TDD carrier supported by a base station, the UE can still operate according to TDD or HD-FDD, and the UE may not require a duplexer. When the UE supports SBFD in a TDD carrier, one duplexer can be shared between SBFD symbols and non-SBFD symbols. For example, within the sub-band portion or the duration of an SBFD symbol, the duplexer can be used as an FDD for the DL sub-band and the UL sub-band. In other duration portions or non-SBFD symbols, the duplexer can be used as a switch for a traditional TDD with D / U switching. Alternatively, in the case of multiple bands (where one or more bands have SBFD) configured / supported with inter-band CA, there can be duplexer sharing between the bands. Figure 12 Embodiments of sub-band full duplex (SBFD) on two bands are shown. This can include SBFD on two bands. For example, for complementary SBFD, there is an SBFD symbol or duration with a UL sub-band configured in a carrier on one band, which does not overlap in time domain with an SBFD symbol or duration with a UL sub-band configured in another carrier on another band. There can be a switch for each TDD carrier / band, and one duplexer shares the SBFD symbol duration between two bands, where there are complementary SBFD symbols on the two bands.

[0098] The above systems and processes can be encoded in a signal-bearing medium, a computer-readable medium (such as a memory), programmed within a device (such as one or more integrated circuits, one or more processors), or processed by a controller or computer. The data can be analyzed in a computer system and used to generate a spectrum. If these methods are executed by software, the software can reside in a memory that resides in or is connected to a non-volatile or volatile memory that stores devices, synchronizers, communication interfaces, or communicates with a transmitter. The circuit or electronic device is designed to send data to another location. The memory can include an ordered list of executable instructions for implementing logical functions. The described logical functions or any system elements can be implemented by optical circuits, digital circuits, source code, analog circuits, analog sources (such as analog electrical, audio, or video signals), or combinations thereof. The software can be embodied in any computer-readable or signal-bearing medium for use by or in connection with an instruction-executable system, apparatus, or device. Such a system can include a computer-based system, a system containing a processor, or another system that can selectively obtain instructions from an instruction-executable system, apparatus, or device that can also execute instructions.

[0099] "Computer-readable medium", "machine-readable medium", "propagation signal medium", and / or "signal-bearing medium" can include any device that contains, stores, transports, propagates, or transmits software for use by or in connection with an instruction-executable system, apparatus, or device. The machine-readable medium can optionally be, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. A non-exhaustive list of examples of machine-readable media includes: an electrical connection "electronic" with one or more wires, a portable disk or optical disk, volatile memory such as random access memory "RAM", read-only memory "ROM", erasable programmable read-only memory (EPROM or flash memory), or optical fiber. The machine-readable medium can also include a tangible medium when printing software, as the software can be electronically stored as an image or in another format (e.g., by optical scanning) and then compiled and / or interpreted or otherwise processed. The processed medium can then be stored in a computer and / or machine memory.

[0100] The illustrations of the embodiments described herein are intended to provide a general understanding of the structure of the various embodiments. These illustrations are not intended as a complete description of all elements and features of the devices and systems that utilize the structures or methods described herein. Many other embodiments may be apparent to those skilled in the art upon reading this disclosure. Other embodiments may be utilized and derived from this disclosure, such that structural and logical substitutions and changes may be made without departing from the scope of this disclosure. In addition, these illustrations are merely representative and may not be drawn to scale. Some of the ratios in the illustrations may be exaggerated while others may be minimized. Accordingly, this disclosure and the figures should be regarded as illustrative rather than restrictive.

[0101] One or more embodiments of this disclosure may, for convenience only, be individually and / or collectively referred to by the term "invention" and are not intended to voluntarily limit the scope of this application to any particular invention or inventive concept. Additionally, although specific embodiments have been shown and described herein, it should be understood that any subsequent arrangement designed to achieve the same or similar purpose may replace the specific embodiments shown. This disclosure is intended to cover any and all subsequent adaptations or variations of the various embodiments. Combinations of the above-described embodiments and other embodiments not specifically described herein will be apparent to those skilled in the art upon reading this disclosure.

[0102] The phrase "coupled to" is defined as being directly connected to or indirectly connected through one or more intermediate components. Such intermediate components may include both hardware-based components and software-based components. Variations in the arrangement and type of components may be made without departing from the spirit or scope of the claims described herein. Additional, different, or fewer components may be provided.

[0103] The subject matter disclosed above should be considered illustrative, not restrictive, and the appended claims are intended to cover all such modifications, enhancements, and other embodiments that fall within the true spirit and scope of this invention. Accordingly, to the fullest extent permitted by law, the scope of this invention will be determined by the broadest permissible interpretation of the appended claims and their equivalents, and shall not be limited or constrained by the foregoing detailed description. Although various embodiments of this invention have been described, it will be apparent to those of ordinary skill in the art that there may be more embodiments and implementations within the scope of this invention. Accordingly, this invention is not limited except as by the appended claims and their equivalents.

Claims

1. A method for wireless communication, comprising: Obtaining a soft frequency band for the wireless communication, the soft frequency band including a plurality of frequency bands; And Operating the soft frequency band according to single-frequency band operation.

2. The method according to claim 1, wherein each of the plurality of frequency bands includes a frequency band, and the soft frequency band includes a combination of frequency bands.

3. The method according to claim 2, wherein the single-frequency band operation includes an operation on the combination of frequency bands.

4. The method according to claim 1, wherein the plurality of frequency bands includes a combination of different frequency bands.

5. The method according to claim 4, wherein the combination includes a combination of a time division duplex (TDD) frequency band and a supplementary uplink (SUL) frequency band.

6. The method according to claim 5, wherein, A single cell having an uplink (UL) carrier and a downlink (DL) carrier is configured based on the combination, and wherein, the UL carrier is on the SUL frequency band, and the DL carrier is on the TDD frequency band.

7. The method according to claim 6, wherein a UL sub-band is supported in the cell, wherein the bandwidth of the UL sub-band is equal to the DL carrier, and wherein the UL sub-band is on the TDD frequency band.

8. The method according to claim 4, wherein the combination includes a combination of a time division duplex (TDD) frequency band and a supplementary downlink (SDL) frequency band.

9. The method according to claim 8, wherein, A single cell having a downlink (DL) carrier and an uplink (UL) carrier is configured based on the combination, and wherein, the DL carrier is on the SDL frequency band, and the UL carrier is on the TDD frequency band.

10. The method according to claim 9, wherein a DL sub-band is supported in the cell, wherein the bandwidth of the DL sub-band is equal to the UL carrier, and wherein the DL sub-band is on the TDD frequency band.

11. The method according to claim 4, wherein the combination includes a combination of a frequency division duplex (FDD) frequency band and a supplementary uplink (SUL) frequency band.

12. The method according to claim 11, wherein, A single cell having an uplink (UL) carrier and a downlink (DL) carrier is configured based on the combination, and wherein, the UL carrier includes discontinuous spectra from both the FDD frequency band and the SUL frequency band.

13. The method according to claim 4, wherein the combination includes a combination of a frequency division duplex (FDD) frequency band and a supplementary downlink (SDL) frequency band.

14. The method according to claim 13, wherein, A single cell having a downlink (DL) carrier and an uplink (UL) carrier is configured based on the combination, and wherein, the DL carrier includes discontinuous spectra from both the FDD frequency band and the SDL frequency band.

15. The method according to claim 4, wherein the combination includes a combination of a time division duplex (TDD) frequency band and a frequency division duplex (FDD) frequency band.

16. The method according to claim 15, wherein, A single cell having an uplink (UL) carrier and a downlink (DL) carrier is configured based on the combination, and a DL sub-band is supported in the UL carrier, and wherein, the UL carrier is on both the FDD frequency band and the TDD frequency band, the DL carrier is on the FDD frequency band, and the DL sub-band is on the TDD frequency band.

17. The method according to claim 15, wherein, A single cell having a downlink (DL) carrier and an uplink (UL) carrier is configured based on the combination, and a UL sub-band is supported in the DL carrier, and wherein the DL carrier is on both the FDD band and the TDD band, the UL carrier is on the FDD band, and the UL sub-band is on the TDD band.

18. The method according to claim 15, wherein, A single cell having one downlink (DL) carrier and two uplink (UL) carriers is configured based on the combination, and a DL sub-band is supported in one of the two UL carriers, and wherein the bandwidth of the DL sub-band is equal to one of the two UL carriers, or the DL sub-band is supported in one of the two UL carriers having larger spectral resources.

19. The method according to claim 15, wherein A single cell having two downlink (DL) carriers and one uplink (UL) carrier is configured based on the combination, and a UL sub-band is supported in one of the two DL carriers, and wherein the bandwidth of the UL sub-band is equal to one of the two DL carriers, or the UL sub-band is supported in one of the two DL carriers having larger spectral resources.

20. The method according to claim 15, further comprising: Using a gap between the FDD UL operating band and the FDD DL operating band as the TDD band; Or Utilizing overlapping of multiple bands through sub-bands.

21. The method according to claim 4, wherein the combination includes a combination of two time-division duplex (TDD) bands.

22. The method according to claim 21, wherein, A single cell having an uplink (UL) carrier and a downlink (DL) carrier is configured based on the combination, and wherein the UL carrier is on one of the two bands, and the DL carrier is on the other of the two bands, or both the UL carrier and the DL carrier are on the two bands.

23. The method according to claim 22, at least one of a UL sub-band and a DL sub-band is supported in the cell, wherein the UL sub-band is supported on the DL carrier, and the DL sub-band is supported on the UL carrier.

24. The method according to claim 21, wherein, A single cell having an uplink (UL) carrier and a downlink (DL) carrier is configured based on the combination, wherein both the UL carrier and the DL carrier are on one of the two bands, and the other of the two bands is configured as a sub-band of at least one of the UL carrier and the DL carrier.

25. A wireless communication device, comprising a processor and a memory, wherein the processor is configured to read code from the memory and implement the method according to any one of claims 1 to 24.

26. A computer program product, comprising computer-readable program medium code stored thereon, the code causing the processor to implement the method according to any one of claims 1 to 24 when executed by the processor.

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