Communication method, communication apparatus and communication system
Spectrum shifting techniques optimize frequency resource management in wireless communication systems, addressing interference and inefficiencies by reallocating signal components, enhancing data transmission efficiency across diverse networks.
Patent Information
- Application Number
- PCT/CN2024/104754
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-04-17
- Filing Date
- 2024-07-10
- Publication Date
- 2025-10-23
AI Technical Summary
Existing wireless communication systems face challenges in efficiently managing spectrum resources, particularly in overlapping frequency resources, leading to interference and inefficiencies in communication methods.
Implementing spectrum shifting techniques, such as direct or cyclic spectrum shifting, to reassign signal components from overlapping frequency resources to new frequency resources, while maintaining the order of mapping and utilizing frequency resource shift offsets to optimize communication.
Enhances communication efficiency by reducing interference and optimizing spectrum utilization, allowing for improved data transmission in various wireless networks, including 5G+, 5G, 4G, 3G, 2G, Wi-Fi, and non-terrestrial networks, with applications in smart factories, ports, delivery systems, and medical systems.
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Figure CN2024104754_23102025_PF_FP_ABST
Abstract
Description
COMMUNICATION METHOD, COMMUNICATION APPARATUS AND COMMUNICATION SYSTEM
[0001] CROSS-REFERENCE TO RELATED APPLICATIONS
[0002] This application claims priority to, U.S. Provisional Application No.: 63 / 635,350, filed April 17, 2024, which is incorporated herein by reference in its entirety.TECHNICAL FIELD
[0003] The present disclosure relates generally to wireless communication technology, and particularly to a communication method, a communication apparatus and a communication system.BACKGROUND
[0004] Wireless communication systems such as fourth generation (4G) system (for example, long-term evolution (LTE) system) , fifth generation (5G) system (e.g., new radio (NR) system) have been deployed to provide various types of applications, such as message, voice, video and other data.
[0005] The above background information is provided to reveal information considered by the applicant to be of possible relevance to the present disclosure. No admission is necessarily intended, nor should be construed, that any of the preceding information constitutes prior art against the present disclosure.SUMMARY
[0006] Embodiments of the present disclosure provide a communication method, a communication apparatus, a communication system, a computer-readable storage medium, a computer program product, and a computer program.
[0007] In a first aspect, the present disclosure provides a communication method, and the method may be performed by a base station (BS) or a chip of the BS. The method includes: transmitting first information for indicating one or more first parameters, where the one or more first parameters include a first frequency resource in a component carrier (CC) ; and transmitting first scheduling information indicating a second frequency resource in the CC for communication, where the communication includes performing a spectrum shifting on an overlapped frequency resource between the first frequency resource and the second frequency resource.
[0008] In a second aspect, the present disclosure provides a communication method, and the method may be performed by a user equipment (UE) or a chip of the UE. The method includes: receiving first information for indicating one or more first parameters, where the one or more first parameters include a first frequency resource in a CC; and receiving the first scheduling information indicating a second frequency resource in the CC for communication, where the communication includes performing a spectrum shifting on an overlapped frequency resource between the first frequency resource and the second frequency resource.
[0009] In some implementations, the spectrum shifting includes direct spectrum shifting or cyclic spectrum shifting.
[0010] In some implementations, the spectrum shifting is the cyclic spectrum shifting; and performing the spectrum shifting, includes: moving a mapping for signal components from the overlapped frequency resource to a third frequency resource, where the third frequency resource does not belong to the second frequency resource, and the mapping for remaining signal components to remaining frequency resource of the second frequency resource is kept unchanged.
[0011] In some implementations, an order of the mapping for the signal components on the third frequency resource is same as an order of the mapping for the signal components on the overlapped frequency resource, and the third frequency resource is located right at an end of the second frequency resource.
[0012] In some implementations, the cyclic spectrum shifting is applicable for Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) signal or Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) signal.
[0013] In some implementations, the spectrum shifting is the direct spectrum shifting; and performing the spectrum shifting, includes: moving a mapping for signal components from the second frequency resource to a fourth frequency resource in the CC, where the fourth frequency resource is not overlapped with the first frequency resource.
[0014] In some implementations, the direct spectrum shifting is to keep a frequency resource mapping order for signal components on the fourth frequency resource same as a resource mapping order for the signal components on the second frequency resource.
[0015] In some implementations, the direct spectrum shifting is applicable for Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) signal or Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) signal.
[0016] In some implementations, the direct spectrum shifting on the overlapped frequency resource between the first frequency resource and the second frequency resource is based on a frequency resource shift offset.
[0017] In some implementations, the frequency resource shift offset is determined based on a size of the overlapped frequency resource.
[0018] In some implementations, an absolute value of the frequency resource shift offset is equal to or greater than the size of the overlapped frequency resource.
[0019] In some implementations, an absolute value of the frequency resource shift offset is positively correlated with the size of the overlapped frequency resource.
[0020] In some implementations, the communication method further includes: transmitting second information for indicating one or more second parameters, where the one or more second parameters include at least one of the following parameters: channel bandwidth of the CC, frequency resource allocations, frequency resource index, numerology; and transmitting second scheduling information indicating a fifth frequency resource for the communication based on the second information, and the communication includes at least one of downlink (DL) transmission or uplink (UL) transmission. Accordingly, the communication method further includes: receiving, by the UE, the second information and the second scheduling information.
[0021] In some implementations, the first information or the second information is transmitted via radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, downlink control information (DCI) signaling, or a combination thereof.
[0022] In some implementations, the first frequency resource is shared with another CC, radio access technology (RAT) or carrier operator.
[0023] In some implementations, a number of subcarriers in the first frequency resource is configurable.
[0024] In some implementations, the one or more first parameters further include Fourier Transform (FT) size.
[0025] In some implementations, the FT may be any one of Fast Fourier Transform (FFT) , Inverse Fast Fourier Transform (IFFT) , Discrete Fourier Transform (DFT) , and Inverse Discrete Fourier Transform (IDFT) .
[0026] In some implementations, the one or more first parameters further include a guard band, and the guard band is at an edge of the first frequency resource or within the first frequency resource.
[0027] In some implementations, the guard band is configurable.
[0028] In some implementations, a minimum value of the guard band is zero.
[0029] In a third aspect, the present disclosure provides a communication apparatus. The communication apparatus includes a processor and a communication interface. The processor is connected to the communications interface. The processor is configured to execute one or more instructions, and the communications interface is configured to communicate with other network elements under the control of the processor. The processor is enabled to perform the method according to the first aspect or any one of the possible implementations of the first aspect, or the second aspect or any one of the possible implementations of the second aspect.
[0030] In a fourth aspect, the present disclosure provides a communication system including a communication apparatus performing the method according to the first aspect or any one of the possible implementations of the first aspect, or the second aspect or any one of the possible implementations of the second aspect.
[0031] In a fifth aspect, the present disclosure provides a computer-readable storage medium. The computer-readable storage medium stores program code, and the program code is used to execute one or more instructions for the method according to the first aspect or any one of the possible implementations of the first aspect, or the second aspect or any one of the possible implementations of the second aspect.
[0032] In a sixth aspect, the present disclosure provides a computer program product including one or more instructions, that when the computer program product is run on a computer, causing the computer to implement the method according to the first aspect or any one of the possible implementations of the first aspect, or the second aspect or any one of the possible implementations of the second aspect.BRIEF DESCRIPTION OF THE DRAWINGS
[0033] For ease of understanding the various described embodiments or implementations herein, reference is made to the detailed description below, in conjunction with the following drawings in which same / similar reference numerals refer to corresponding parts throughout the figures.
[0034] FIG. 1 illustrates a communication system in which embodiments or implementations of the present disclosure may be implemented;
[0035] FIG. 2 illustrates another communication system in which embodiments or implementations of the present disclosure may be implemented;
[0036] FIG. 3 illustrates an apparatus that wirelessly communicates with at least one apparatus in a communication system, in accordance with some embodiments or implementations of the present disclosure;
[0037] FIG. 4 illustrates a block diagram of an electronic device or apparatus, in accordance with some embodiments or implementations of the present disclosure;
[0038] FIG. 5 illustrates an example of guard band between adjacent carriers or operators, in accordance with some embodiments or implementations of the present disclosure;
[0039] FIG. 6 illustrates an example of guard band between adjacent carriers or RATs, in accordance with some embodiments or implementations of the present disclosure;
[0040] FIG. 7 illustrates an example of pre-defined or configured virtual CCs for different operators and shared single carrier, in accordance with some embodiments or implementations of the present disclosure;
[0041] FIG. 8 illustrates an example of adjustable / configurable virtual CCs for different operators / RATs, in accordance with some embodiments or implementations of the present disclosure;
[0042] FIG. 9 illustrates a flow chart of a communication method, in accordance with some embodiments or implementations of the present disclosure;
[0043] FIG. 10 illustrates a scenario in which the shared frequency resource in a CC is un-occupied, in accordance with some embodiments or implementations of the present disclosure;
[0044] FIG. 11 illustrates a scenario in which the shared frequency resource is occupied, in accordance with some embodiments or implementations of the present disclosure;
[0045] FIG. 12A illustrates an example of spectrum shifting in the scenario as illustrated in FIG. 11;
[0046] FIG. 12B illustrates another example of spectrum shifting in the scenario as illustrated in FIG. 11;
[0047] FIG. 13 illustrates an example of spectrum mirror-swapping, in accordance with some embodiments or implementations of the present disclosure;
[0048] FIG. 14 illustrates some examples of spectrum sharing between different CCs / RATs, in accordance with some embodiments or implementations of the present disclosure;
[0049] FIG. 15 illustrates a block diagram of a communication apparatus, in accordance with some embodiments or implementations of the present disclosure; and
[0050] FIG. 16 illustrates a block diagram of another communication apparatus, in accordance with some embodiments or implementations of the present disclosure.
[0051] FIG. 17 illustrates an example apparatus according to an implementation of the present disclosure.DETAILED DESCRIPTION
[0052] The technical solutions described in the present disclosure are applicable to a wide range of communication networks, such as a next generation (e.g., 5G+, or later) network, or a legacy (e.g., 5G, 4G, 3G or 2G) network. The solutions may also be implemented in wireless fidelity (Wi-Fi) , non-terrestrial network (NTN) , cloud and edge computing service, sensing services, or distributed or self-organized networks. In an example, the solutions may be applied to automated manufacturing systems in smart factories. In another example, the solutions may be applied to other intelligent vertical scenarios such as ports, delivery systems and medical systems.
[0053] For ease of understanding the embodiments or implementations of the present disclosure, a communication system shown in FIGS. 1 to 4 is used as an example to describe in detail a communication system to which embodiments or implementations of the present disclosure are applicable.
[0054] In the following specific example embodiments of the present disclosure will now be explained.
[0055] FIG. 1 illustrates a schematic diagram of an application scenario in accordance with an embodiment of the present disclosure.
[0056] Referring to FIG. 1, as an illustrative example without limitation, a simplified schematic illustration of a communication system is provided. The communication system 100 (which may be a wireless system) includes a radio access network 120. The radio access network (RAN) 120 may be a next generation radio access network, or a legacy (e.g., 5G, 4G, 3G or 2nd generation (2G) ) radio access network. One or more communication electronic devices (EDs) 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110j (generically referred to as 110) may be interconnected to one another or connected to one or more network nodes (170a, 170b, generically referred to as 170) in the radio access network 120. A core network 130 may be a part of the communication system and may be dependent or independent of the radio access technology used in the communication system 100. The communication system 100 may also include a public switched telephone network (PSTN) 140, Internet 150, and other networks 160.
[0057] In general, the communication system 100 enables multiple wireless or wired elements to communicate data and other content. The communication system 100 may provide content, such as voice, data, video, and / or text, via broadcast, multicast, groupcast, unicast, etc. And the communication system 100 may provide a wide range of communication services and applications (such as earth monitoring, remote sensing, passive sensing and positioning, navigation and tracking, and autonomous delivery and mobility) . The services and / or applications may be mobile broadband (MBB) services, ultra-reliable low-latency communication (URLLC) services, or machine type communication (MTC) services.
[0058] The communication system 100 may operate by sharing resources, such as carrier spectrum bandwidth, between its constituent elements.
[0059] FIG. 2 illustrates more detailed example for communication system 100.
[0060] The communication system 100 may include a terrestrial communication system and / or a non-terrestrial communication system. The communication system 100 may provide a high degree of availability and robustness through a joint operation of a terrestrial communication system and a non-terrestrial communication system. For example, integrating a non-terrestrial communication system (or components thereof) into a terrestrial communication system will result in what may be considered a heterogeneous network including multiple layers. The heterogeneous network may achieve better overall performance through efficient multi-link joint operation, more flexible functionality sharing, and faster physical layer link switching between terrestrial networks and non-terrestrial networks.
[0061] The terrestrial communication system and the non-terrestrial communication system may be considered sub-systems of the communication system.
[0062] Same as in the example shown in FIG. 1, in the example shown in FIG. 2, the communication system 100 may include EDs 110a, 110b, 110c, 110d (generically referred to as EDs 110) , and RANs 120a, 120b. In addition, the communication system 100 may also include a non-terrestrial communication network 120c. The communication system 100 may also include one or more of a core network 130, a public switched telephone network (PSTN) 140, Internet 150, and other networks 160. RANs 120a, 120b include respective RAN nodes such as base stations (BSs) 170a, 170b, which may be generically referred to as terrestrial transmit and receive points (T-TRPs) 170a, 170b. In one implementation, the non-terrestrial communication network 120c includes an RAN node such as an access node (or base station) 172, which may be generically referred to as a non-terrestrial transmit and receive point (NT-TRP) 172. As may be surmised on the basis of similarity in reference numerals, the non-terrestrial communication network 120c may be considered to be a radio access network, with operational aspects in common with the RANs 120a, 120b. In another implementations, the non-terrestrial communication network 120c may include at least one NTN device and at least one corresponding terrestrial network device, where the at least one non-terrestrial network device works as a transport layer device and the at least one corresponding terrestrial network device works as an RAN node, which communicates with the ED via the non-terrestrial network device. In addition, there may be an NTN gateway in the ground (i.e., referred as a terrestrial network device) also as a transport layer device to communication with both the NTN device, and the RAN node communicates with the ED via the NTN device and the NTN gateway. In some implementations, the NTN gateway and the RAN node may be located in the same device.
[0063] Any ED 110 may be alternatively or additionally configured to interface, access, or communicate with any T-TRPs 170a, 170b and NT-TRP 172, Internet 150, the core network 130, the PSTN 140, the other networks 160, or any combination of the preceding. In some examples, ED 110a may communicate an uplink (UL) and / or downlink (DL) transmission over a terrestrial air interface 190a with T-TRP 170a. In some examples, the EDs 110a, 110b, 110c, and 110d may also communicate directly with one another via one or more sidelink (SL) air interfaces 190b. In some examples, ED 110d may communicate an uplink and / or downlink transmission over a non-terrestrial air interface 190c with NT-TRP 172.
[0064] The air interfaces 190a and 190b may use similar communication technology, such as any suitable radio access technology. For example, the communication system 100 may implement one or more channel access methods, such as code division multiple access (CDMA) , space division multiple access (SDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal FDMA (OFDMA) , or single-carrier FDMA (SC-FDMA, also known as discrete Fourier transform spread OFDMA, DFT-s-OFDMA) in the air interfaces 190a and 190b. The air interfaces 190a and 190b may utilize other higher dimension signal spaces, which may involve a combination of orthogonal and / or non-orthogonal dimensions.
[0065] The non-terrestrial air interface 190c may enable communication between the ED 110d and one or more NT-TRPs 172 via a wireless link or simply a link. For some examples, the link is a dedicated connection for unicast transmission, a connection for broadcast transmission, or a connection between a group of EDs 110 and one or more NT-TRPs 172 for multicast transmission.
[0066] The RANs 120a and 120b are in communication with the core network 130 to provide the EDs 110a 110b, and 110c with various services such as voice, data, and other services. The RANs 120a and 120b and / or the core network 130 may be in direct or indirect communication with one or more other RANs (not shown) , which may or may not be directly served by core network 130, and may or may not employ the same radio access technology as RAN 120a, RAN 120b or both. The core network 130 may also serve as a gateway access between (i) the RANs 120a and 120b or EDs 110a 110b, and 110c or both, and (ii) other networks (such as the PSTN 140, Internet 150, and the other networks 160) . In addition, some or all of the EDs 110a 110b, and 110c may include functionality for communicating with different wireless networks over different wireless links using different wireless technologies and / or protocols. Instead of wireless communication (or in addition thereto) , the EDs 110a 110b, and 110c may communicate via wired communication channels to a service provider or switch (not shown) , and to Internet 150. PSTN 140 may include circuit switched telephone networks for providing plain old telephone service (POTS) . Internet 150 may include a network of computers and subnets (intranets) or both, and incorporate protocols, such as Internet Protocol (IP) , Transmission Control Protocol (TCP) , User Datagram Protocol (UDP) . EDs 110a 110b, and 110c may be multimode devices capable of operation according to multiple radio access technologies, and incorporate multiple transceivers necessary to support such.
[0067] In addition, the communication system 100 may include a sensing agent (not shown in the figure) to manage the sensed data from ED110 and or the T-TRP 170 and / or NT-TRP 172. In one implementation, the sensing agent is located in the T-TRP 170 and / or NT-TRP 172. In another implementation, the sensing agent is a separate node which has interface to communicate with the core network 130 and / or the RAN 120 (e.g., the T-TRP 170 and / or NT-TRP 172) .
[0068] FIG. 3 illustrates example of Apparatus 310 wirelessly communicating with at least one of two apparatuses (e.g., Apparatus 320a and Apparatus 320b, referred as Apparatus 320) in a communication system, e.g., the communication system 100, in accordance with one embodiment. Apparatus 310 may be a UE (e.g., ED 110 in FIG. 3) . Apparatus 320a may be a terrestrial network device (e.g., T-TRP 170 as shown in FIG. 3) , and Apparatus 320b may be a non-terrestrial network device (e.g., NT-TRP 172 as shown in FIG. 3) . However, this is not necessary. For example, Apparatus 320a may be an NT-TRP, and 320b may be a T-TRP, both Apparatus 320a and 320b may be T-TRPs or NT-TRPs, in accordance with present disclosure. In the following, the ED 110 as an example of the Apparatus 310 is described, and T-TRP 170 as an example of Apparatus 320a is described, and NT-TRP 172 as an example of Apparatus 320a is described. Although only one Apparatus 310, one Apparatus 320a and one Apparatus 320b, it will be noted that the number of Apparatus 310 (e.g., ED 110) may be one or more, and the number of Apparatus 320a and / or 320b may be one or more. For example, one ED110 may be served by only one T-TRP 170 (or one NT-TRP172) , by more than one T-TRP 170, by more than one NT-TRP 172, or by one or more T-TRP 170 and one or more NT-TRP172.
[0069] The ED 110 is used to connect persons, objects, machines, etc. The ED 110 may be widely used in various scenarios including, for example, cellular communication, device-to-device (D2D) , vehicle to everything (V2X) , peer-to-peer (P2P) , machine-to-machine (M2M) , MTC, internet of things (IoT) , virtual reality (VR) , augmented reality (AR) , mixed reality (MR) , metaverse, digital twin, industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery and mobility, etc.
[0070] Each ED 110 represents any suitable end user device for wireless operation and may include such devices (or may be referred to but not limited to) as a user equipment / terminal device (UE) , a wireless transmit / receive unit (WTRU) , a mobile station, a fixed or mobile subscriber unit, a cellular telephone, a station (STA) , an MTC device, a personal digital assistant (PDA) , a smartphone, a laptop, a computer, a tablet, a wireless sensor, a consumer electronics device, a smart book, a vehicle, a car, a truck, a bus, a train, or an IoT device, wearable devices (such as a watch, a pair of glasses, and head mounted equipment) , an industrial device, or an apparatus in (e.g., communication module, modem, or chip) or including the forgoing devices, among other possibilities. Future generation EDs 110 may be referred to using other terms. The base stations 170a and 170b each are a T-TRP and will hereafter be referred to as T-TRP 170. Also as shown in FIG. 3, a non-terrestrial (NT) device will hereafter be referred to as NT-TRP 172. Each ED 110 connected to T-TRP 170 and / or NT-TRP 172 may be dynamically or semi-statically turned-on (i.e., established, activated, or enabled) , turned-off (i.e., released, deactivated, or disabled) and / or configured in response to one of more of: connection availability and connection necessity.
[0071] As shown in FIG. 3, the ED 110 include at least one processor 210. Only one processor 210 is illustrated to avoid congestion in the drawing. The ED 110 may further include a transmitter 201 and a receiver 203 coupled to one or more antennas 204. Only one antenna 204 is illustrated to avoid congestion in the drawing. One, some, or all of the antennas 204 may alternatively be panels. The transmitter 201 and the receiver 203 may be integrated, e.g., as a transceiver. The transceiver is configured to modulate data or other content for transmission by at least one antenna 204 or network interface controller (NIC) . The transceiver is also configured to demodulate data or other content received by the at least one antenna 204. Each transceiver includes any suitable structure for generating signals for wireless or wired transmission and / or processing signals received wirelessly or by wire. Each antenna 204 includes any suitable structure for transmitting and / or receiving wireless or wired signals. The ED 110 may include at least one memory 208. Only the transmitter 201, receiver 203, processor 210, memory 208, and antenna 204 is illustrated for simplicity, but the ED 110 may include one or more other components.
[0072] The memory 208 stores instructions. The memory 208 may also store data used, generated, or collected by the ED 110. For example, the memory 208 may store software instructions or modules configured to implement some or all of the functionality and / or embodiments described herein and that are executed by one or more processing unit (s) (e.g., a processor 210) . Each memory 208 includes any suitable volatile and / or non-volatile storage and retrieval device (s) . Any suitable type of memory may be used, such as random access memory (RAM) , read only memory (ROM) , hard disk, optical disc, subscriber identity module (SIM) card, memory stick, secure digital (SD) memory card, and on-processor cache.
[0073] The ED 110 may further include one or more input / output devices (not shown) or interfaces (such as a wired interface to Internet 150 in FIG. 1) . The input / output devices or interfaces permit interaction with a user or other devices in the network. Each input / output device or interface includes any suitable structure for providing information to or receiving information from a user, and / or for network interface communication. Suitable structures include, for example, a speaker, microphone, keypad, keyboard, display, touch screen, etc.
[0074] The processor 210 performs (or controls the ED110 to perform) operations described herein as being performed by the ED110. As illustrated below and elsewhere in the present disclosure. For example, the processor 210 performs or controls the ED110 to perform receiving transport blocks (TBs) , using a resource for decoding of one of the received TBs, releasing the resource for decoding of another of the received TBs, and / or receiving configuration information configuring a resource. In details, the operation may include those operations related to preparing a transmission for uplink transmission to the NT-TRP 172 and / or the T-TRP 170; those operations related to processing downlink transmissions received from the NT-TRP 172 and / or the T-TRP 170; and those operations related to processing sidelink transmission to and from another ED 110. Processing operations related to preparing a transmission for uplink transmission may include operations such as encoding, modulating, transmit beamforming, and generating symbols for transmission. Processing operations related to processing downlink transmissions may include operations such as receive beamforming, demodulating and decoding received symbols. Processing operations related to processing sidelink transmissions may include operations such as transmit / receive beamforming, modulating / demodulating and encoding / decoding symbols. Depending upon the embodiment, a downlink transmission may be received by the receiver 203, possibly using receive beamforming, and the processor 210 may extract signaling from the downlink transmission (e.g., by detecting and / or decoding the signaling) . An example of signaling may be a reference signal transmitted by the NT-TRP 172 and / or by the T-TRP 170. In some embodiments, the processor 210 implements the transmit beamforming and / or the receive beamforming based on the indication of beam direction, e.g., beam angle information (BAI) , received from the T-TRP 170. In some embodiments, the processor 210 may perform operations relating to network access (e.g., initial access) and / or downlink synchronization, such as operations relating to detecting a synchronization sequence, and decoding and obtaining the system information. In some embodiments, the processor 210 may perform channel estimation, e.g., using a reference signal received from the NT-TRP 172 and / or from the T-TRP 170.
[0075] Although not illustrated, the processor 210 may form part of the transmitter 201 and / or part of the receiver 203. Although not illustrated, the memory 208 may form part of the processor 210.
[0076] The processor 210, the processing components of the transmitter 201, and the processing components of the receiver 203 may each be implemented by the same or different one or more processors that are configured to execute instructions stored in a memory (e.g., in the memory 208) . Alternatively, some or all of the processor 210, the processing components of the transmitter 201, and the processing components of the receiver 203 may each be implemented using dedicated circuitry, such as a programmed field-programmable gate array (FPGA) , an application-specific integrated circuit (ASIC) , or a hardware accelerator such as a graphics processing unit (GPU) or an artificial intelligence (AI) accelerator.
[0077] In some implementations, the ED 110 may be an apparatus (also called component) , for example, communication module, modem, chip, or chipset, which includes at least one processor 210, and an interface or at least one pin. In this scenario, the transmitter 201 and receiver 203 may be replaced by the interface or at least one pin, where the interface or at least one pin is to connect the apparatus (e.g., chip) and other apparatus (e.g., chip, memory, or bus) . Accordingly, the transmitting information to the NT-TRP 172 and / or the T-TRP 170 and / or another ED 110 may be referred as transmitting information to the interface or at least one pin, or as transmitting information to the NT-TRP 172 and / or the T-TRP 170 and / or another ED 110 via the interface or at least one pin, and receiving information from the NT-TRP 172 and / or the T-TRP 170 and / or another ED 110 may be referred as receiving information from the interface or at least one pin, or as receiving information from the NT-TRP 172 and / or the T-TRP 170 and / or another ED 110 via the interface or at least one pin. The information may include control signaling and / or data.
[0078] As shown in FIG. 3, the T-TRP 170 include at least one processor 260. Only one processor 260 is illustrated to avoid congestion in the drawing. The T-TRP 170 may further include at least one transmitter 252 and at least one receiver 254 coupled to one or more antennas 256. Only one antenna 256 is illustrated to avoid congestion in the drawing. One, some, or all of the antennas 256 may alternatively be panels. The transmitter 252 and the receiver 254 may be integrated as a transceiver. The T-TRP 170 may further include at least one memory 258. The T-TRP 170 may further include scheduler 253. Only the transmitter 252, receiver 254, processor 260, memory 258, antenna 256 and scheduler 253 are illustrated for simplicity, but the T-TRP may include one or more other components.
[0079] The T-TRP 170 may be known by other names in some implementations, such as a base station, a base transceiver station (BTS) , a radio base station, a network node, a network device, a device on the network side, a transmit / receive node, a Node B, an evolved NodeB (eNodeB or eNB) , a Home eNodeB, a next Generation NodeB (gNB) , a transmission point (TP) , a site controller, an access point (AP) , a wireless router, a relay station, a terrestrial node, a terrestrial network device, a terrestrial base station, a base band unit (BBU) , a remote radio unit (RRU) , an active antenna unit (AAU) , a remote radio head (RRH) , a central unit (CU) , a distributed unit (DU) , a positioning node, and other possibilities. The T-TRP 170 may be a macro base station (BS) , a pico-BS, a relay node, a donor node, or the like, or combinations thereof. The T-TRP 170 may refer to the forgoing devices or refer to the apparatus (e.g., a communication module, a modem, or a chip) in the forgoing devices.
[0080] In some embodiments, the parts of the T-TRP 170 may be distributed. For example, some of the modules of the T-TRP 170 may be located remote from the equipment that houses the antennas 256 for the T-TRP 170, and may be coupled to the equipment that houses the antennas 256 over a communication link (not shown) sometimes known as front haul, such as common public radio interface (CPRI) . Therefore, in some embodiments, the term T-TRP 170 may also refer to modules on the network side that perform processing operations, such as determining the location of the ED 110, resource allocation (scheduling) , message generation, and encoding / decoding, and that are not necessarily part of the equipment that houses the antennas 256 of the T-TRP 170. The modules may also be coupled to other T-TRPs. In some embodiments, the T-TRP 170 may actually be a plurality of T-TRPs that are operating together to serve the ED 110, e.g., through the use of coordinated multipoint transmissions.
[0081] The processor 260 performs operations including those related to: preparing a transmission for downlink transmission to the ED 110, processing an uplink transmission received from the ED 110, preparing a transmission for backhaul transmission to the T-TRP 170 and / or NT-TRP 172, and processing a transmission received over backhaul from the T-TRP 170 and / or NT-TRP 172. Processing operations related to preparing a transmission for downlink or backhaul transmission may include operations such as encoding, modulating, precoding (e.g., multiple input multiple output (MIMO) precoding) , transmit beamforming, and generating symbols for transmission. Processing operations related to processing received transmissions in the uplink or over backhaul may include operations such as receive beamforming, demodulating received symbols, and decoding received symbols. The processor 260 may also perform operations relating to network access (e.g., initial access) and / or downlink synchronization, such as generating the content of synchronization signal blocks (SSBs) , and generating the system information. In some embodiments, the processor 260 also generates an indication of beam direction, e.g., BAI, which may be scheduled for transmission by a scheduler 253. The processor 260 performs other network-side processing operations described herein, such as determining the location of the ED 110, and determining where to deploy the NT-TRP 172. In some embodiments, the processor 260 may generate signaling, e.g., to configure one or more parameters of the ED 110 and / or one or more parameters of the NT-TRP 172. Any signaling generated by the processor 260 is sent by the transmitter 252.
[0082] The scheduler 253 may be coupled to the processor 260 or integrated in the processor 260. The scheduler 253 may be included within or operated separately from the T-TRP 170. The scheduler 253 may schedule uplink, downlink, sidelink, and / or backhaul transmissions, including issuing scheduling grants and / or configuring scheduling-free (e.g., "configured grant" ) resources.
[0083] The memory 258 is configured to store information, and optionally data. The memory 258 stores instructions and data used, generated, or collected by the T-TRP 170. For example, the memory 258 may store software instructions or modules configured to implement some or all of the functionality and / or embodiments described herein and that are executed by the processor 260.
[0084] Although not illustrated, the processor 260 may form part of the transmitter 252 and / or part of the receiver 254. Also, although not illustrated, the processor 260 may implement the scheduler 253. Although not illustrated, the memory 258 may form part of the processor 260.
[0085] The processor 260, the scheduler 253, the processing components of the transmitter 252, and the processing components of the receiver 254 may each be implemented by the same or different one or more processors that are configured to execute instructions stored in a memory, e.g., in the memory 258. Alternatively, some or all of the processor 260, the scheduler 253, the processing components of the transmitter 252, and the processing components of the receiver 254 may be implemented using dedicated circuitry, such as a programmed FPGA, a hardware accelerator (e.g., a GPU or AI accelerator) , or an ASIC.
[0086] When the T-TRP 170 is an apparatus (also called as component) , for example, communication module, modem, chip, or chipset in a device, which includes at least one processor, and an interface or at least one pin. In this scenario, the transmitter 252 and receiver 254 may be replaced by the interface or at least one pin, where the interface or at least one pin is to connect the apparatus (e.g., chip) and other apparatus (e.g., chip, memory, or bus) . Accordingly, the transmitting information to the NT-TRP 172 and / or the T-TRP 170 and / or ED 110 may be referred as transmitting information to the interface or at least one pin, and receiving information from the NT-TRP 172 and / or the T-TRP 170 and / or ED 110 may be referred as receiving information from the interface or at least one pin. The information may include control signaling and / or data.
[0087] Although the NT-TRP 172 is illustrated as a drone only as an example, the NT-TRP 172 may be implemented in any suitable non-terrestrial form, such as satellites and high altitude platforms, including international mobile telecommunication base stations and unmanned aerial vehicles, for example. Also, the NT-TRP 172 may be known by other names in some implementations, such as a non-terrestrial node, a non-terrestrial network device, or a non-terrestrial base station.
[0088] As shown in FIG. 3, The T-TRP 170 may further include at least one transmitter 252 and at least one receiver 254 coupled to one or more antennas 256. Only one antenna 256 is illustrated to avoid congestion in the drawing. One, some, or all of the antennas 256 may alternatively be panels. The transmitter 252 and the receiver 254 may be integrated as a transceiver. The T-TRP 170 may further include at least one memory 258. The T-TRP 170 may further include scheduler 253. Only the transmitter 252, receiver 254, processor 260, memory 258, antenna 256 and scheduler 253 are illustrated for simplicity, but the T-TRP may include one or more other components.
[0089] As shown in FIG. 3, the NT-TRP 172 include at least one processor 276. Only one processor 276 is illustrated to avoid congestion in the drawing. The NT-TRP 172 may include a transmitter 272 and a receiver 274 coupled to one or more antennas 280. Only one antenna 280 is illustrated to avoid congestion in the drawing. One, some, or all of the antennas may alternatively be panels. The transmitter 272 and the receiver 274 may be integrated as a transceiver. The NT-TRP 172 may further include at least one memory 278. The NT-TRP 172 may further include a scheduler. Only the transmitter 272, receiver 274, processor 276, memory 278, antenna 280 are illustrated for simplicity, but the NT-TRP may include one or more other components.
[0090] The NT-TRP 172 include a processor 276 for performing operations including those related to: preparing a transmission for downlink transmission to the ED 110, processing an uplink transmission received from the ED 110, preparing a transmission for backhaul transmission to T-TRP 170 and / or another NT-TRP 172, and processing a transmission received over backhaul from the T-TRP 170 and / or another NT-TRP 172. Processing operations related to preparing a transmission for downlink or backhaul transmission may include operations such as encoding, modulating, precoding (e.g., MIMO precoding) , transmit beamforming, and generating symbols for transmission. Processing operations related to processing received transmissions in the uplink or over backhaul may include operations such as receive beamforming, demodulating received symbols, and decoding received symbols. In some embodiments, the processor 276 implements the transmit beamforming and / or receive beamforming based on beam direction information (e.g., BAI) received from the T-TRP 170. In some embodiments, the processor 276 may generate signaling, e.g., to configure one or more parameters of the ED 110. In some embodiments, the NT-TRP 172 implements physical layer processing, but does not implement higher layer functions such as functions at the medium access control (MAC) or radio link control (RLC) layer. As this is only an example, more generally, the NT-TRP 172 may implement higher layer functions in addition to physical layer processing.
[0091] The memory 278 is configured to store information and optionally data. The memory 258 stores instructions and data used, generated, or collected by the NT-TRP 172. For example, the memory 278 may store software instructions or modules configured to implement some or all of the functionality and / or embodiments described herein and that are executed by the processor 276.
[0092] Although not illustrated, the processor 276 may form part of the transmitter 272 and / or part of the receiver 274. Although not illustrated, the memory 278 may form part of the processor 276.
[0093] The processor 276, the processing components of the transmitter 272, and the processing components of the receiver 274 may each be implemented by the same or different one or more processors that are configured to execute instructions stored in a memory, e.g., in the memory 278. Alternatively, some or all of the processor 276, the processing components of the transmitter 272, and the processing components of the receiver 274 may be implemented using dedicated circuitry, such as a programmed FPGA, a hardware accelerator (e.g., a GPU or AI accelerator) , or an ASIC. In some embodiments, the NT-TRP 172 may actually be a plurality of NT-TRPs that are operating together to serve the ED 110, e.g., through coordinated multipoint transmissions.
[0094] When the NT-TRP 172 is an apparatus (e.g., communication module, modem, chip, or chipset) in a device, the NT-TRP 172 includes at least one processor, and an interface or at least one pin. In this scenario, the transmitter 272 and receiver 257 may be replaced by the interface or at least one pin, where the interface or at least one pin is to connect the apparatus (e.g., chip) and other apparatus (e.g., chip, memory, or bus) . Accordingly, the transmitting information to the T-TRP 170 and / or another NT-TRP 172 and / or ED 110 may be referred as transmitting information to the interface or at least one pin, and receiving information from the T-TRP 170 and / or another NT-TRP 172 and / or ED 110 may be referred as receiving information from the interface or at least one pin. The information may include control signaling and / or data.
[0095] Note that "transmit / receive point (TRP) " , as used herein, may refer to a T-TRP or an NT-TRP. A T-TRP may alternatively be called a terrestrial network TRP ( "TN TRP" ) , and an NT-TRP may alternatively be called a non-terrestrial network TRP ( "NTN TRP" ) . The T-TRP 170, the NT-TRP 172, and / or the ED 110 may include other components, but these have been omitted for the sake of clarity.
[0096] Note that "signaling" , as used herein, may alternatively be called control signaling, control message, control information, or message for simplicity. Signaling between a BS (e.g., the network node 170) and a terminal or sensing device (e.g., ED 110) , or signaling between different terminal or sensing device (e.g., between ED 110i and ED110j) may be carried in physical layer signaling (also called as dynamic signaling) , which is transmitted in a physical layer control channel. For downlink the physical layer signaling may be known as downlink control information (DCI) which is transmitted in a physical downlink control channel (PDCCH) . For uplink, the physical layer signaling may be known as uplink control information (UCI) which is transmitted in a physical uplink control channel (PUCCH) . For sidelink, signaling between different terminal or sensing device (e.g., between ED 110i and ED110j) may be known as sidelink control information (SCI) which is transmitted in a physical sidelink control channel (PSCCH) . Signaling may be carried in a higher-layer (e.g., higher than physical layer) signaling, which is transmitted in a physical layer data channel, e.g., in a physical downlink shared channel (PDSCH) for downlink signaling, in a physical uplink shared channel (PUSCH) for uplink signaling, and in a physical sidelink shared channel (PSSCH) for sidelink signaling. Higher-layer signaling may also called static signaling, or semi-static signaling. Higher-layer signaling may be radio resource control (RRC) protocol signaling or media access control -control element (MAC-CE) signaling. Signaling may be included in a combination of physical layer signaling and higher layer signaling.
[0097] It should be noted that in present disclosure, "information" , when different from "message" , may be carried in one single message, or be carried in more than one separate message.
[0098] One or more steps of the methods provided in the present disclosure herein may be performed by corresponding units or modules, according to FIG. 4. FIG. 4 illustrates units or modules in a device or apparatus, such as in the ED 110, in the T-TRP 170, or in the NT-TRP 172. For example, a signal may be transmitted by a transmitting unit or by a transmitting module. A signal may be received by a receiving unit or by a receiving module. A signal may be processed by a processing unit or a processing module. Other steps may be performed by an artificial intelligence (AI) or machine learning (ML) module. The respective units or modules may be implemented using hardware, one or more components or devices that execute software, or a combination thereof. For example, one or more of the units or modules may each be a circuit such as an integrated circuit. Examples of an integrated circuit include a programmed FPGA, a GPU, or an ASIC. For example, one or more of the units or modules may each be logical such as a logical function performed by a circuit, by a portion of an integrated circuit, or by software instructions executed by a processor. It will be appreciated that where the modules are implemented using software for execution by a processor for example, the modules may be retrieved by a processor, in whole or part as needed, individually or together for processing, in single or multiple instances, and that the modules themselves may include instructions for further deployment and instantiation.
[0099] Additional details regarding the EDs 110, the T-TRP 170, and the NT-TRP 172 are known to those of skill in the art. As such, these details are omitted here.
[0100] The present disclosure is aimed at devices such as UEs, IoT devices, and cars. The type of network scenarios envisioned may include terrestrial TRPs such as base-stations and / or non-terrestrial TRPs such as drones, balloons, high-altitude platform stations (HAPS) , satellites, and any such devices that support radio access technologies such as 5G NR, future 6G or other technologies.
[0101] For illustrative purposes, specific example embodiments will now be explained in greater detail in conjunction with the figures and above mentioned system, ED and TRP.
[0102] In wireless communication, spectrum resource is scarce and very expensive to use. Available spectrum may include multiple frequency bands from low frequency bands to high frequency bands. The spectrum used in long term evolution (LTE) and new radio (NR) includes various frequency bands or / and various carriers (or components carriers) in frequency band.
[0103] To avoid signal interference or leakage, guard bands are required between adjacent carriers used by different operators or radio access technologies (RATs) such as 4G, 5G, and 6G, or even within the same operators with same RAT.
[0104] The width of a guard band (also known as a guard frequency or guard channel) between two carriers depends on various factors, including the specific frequency band, subcarrier spacing (SCS) , and regulatory requirements. For example, an LTE channel having a total bandwidth of 20 MHz may have a guard band around 1 MHz on each side (approximately 5%of the total bandwidth) , and an NR channel may have a guard band associated with frequency band and numerology with reduced size of a guard band between carriers or between carrier components in frequency band.
[0105] The embodiments set forth herein represent information sufficient to practice the claimed subject matter and illustrate ways of practicing such subject matter. Upon reading the following description in light of the accompanying figures, those of skill in the art will understand the concepts of the claimed subject matter and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure and the accompanying claims.
[0106] In wireless communication, various frequency bands or / and various carrier in frequency band will be used. These frequency bands may include:
[0107] low frequency bands (sub-6 GHz) , also known as frequency range 1 (FR1) : primarily used for coverage and capacity;
[0108] high frequency bands (above 6 GHz) , also known as FR2, which includes frequency bands from 24.25 GHz to 71.0 GHz: suitable for high data rates but with limited coverage; and
[0109] upper mid-band from 7 GHz to 24 GHz, also known as FR3: balancing coverage and capacity. This is 6G intended frequency bands and these bands are expected to balance coverage, capacity, and deployment for typical scenarios, offering strong benefits when considering new trends such as non-terrestrial network (NTN) , reconfigurable intelligent surface (RIS) , and integrated sensing and communication (ISAC) .
[0110] In some implementations, a static or fixed spectrum allocation scheme among different operators and / or RATs may be used.
[0111] In addition, to avoid signal interference or leakage, guard bands are required between carriers. As shown in FIG. 5 (for carriers of different operators) and FIG. 6 (for carriers of different RATs) , three carriers (or carrier components, Carrier 1, Carrier 2 and Carrier 3) in one or more frequency bands may be allocated among three different operators or RATs, where the guard band 1 is provided between Carrier 1 and Carrier 2 and the guard band 2 is provided between Carrier 2 and Carrier 3 in frequency domain to avoid mutual signal interference or leakage between two neighboring carriers.
[0112] The width of a guard band (also known as a guard frequency or guard channel) between two carriers depends on various factors, including the specific frequency band, subcarrier spacing, and regulatory requirements. For example, an LTE channel having a total bandwidth of 20 MHz may have a guard band around 1 MHz on each side (approximately 5%of the total bandwidth) , and an NR channel may have a guard band associated with frequency band and numerology with reduced size of a guard band between carriers or between carrier components in frequency band. Therefore, guard bands between two neighbor carriers are non-negligible.
[0113] Given the spectrum allocation among different operators or RATs, if the spectrum (i.e., a carrier) for each operator or RAT is used without any spectrum sharing, the spectrum may lead to inefficient spectrum usage overall, as due to traffic in different operators or RATs may vary in loading or requirements, some operators / RATs may have un-occupied spectrum but another operator / RAT may not have enough spectrum to support its traffic. The above spectrum allocation scheme and usage may lead to low spectrum usage efficiency.
[0114] Accordingly, a communication method on spectrum sharing with virtual single carrier is provided in the present disclosure, to enhance spectrum usage efficiency. In the method, the spectrum allocation among different operators or RATs may be improved by dynamically or adaptively sharing spectrum among the different operators or RATs, in a way of virtual carrier or component carrier (CC) , described below. The method may also reduce the implementation complexity.
[0115] Available spectrum allocated to different operators or RATs may be considered with spectrum sharing upon traffic and service demand. The available spectrum may be pre-defined or configured into virtual carrier components (CCs) , one for each operator or RAT, where a bandwidth of each virtual CC (V-CC) may be adjusted adaptively based spectrum usage demand and spectrum sharing scenarios. As shown in FIG. 7, the available spectrum allocated to three operators or RATs in one or more frequency bands is considered in usage as virtual single carrier (that includes three V-CCs) . It will be noted that such a scheme may enhance the spectrum usage efficiency by removing or reducing size of the guard bands in FIG. 5 and FIG. 6, based on factors, e.g., center frequency of CC, frequency band, numerology, etc. In FIG. 7, the available spectrum is divided into equal portions for three operators or RATs, respectively, where each CC with its allocated (channel or transmission) bandwidth may support OFDM signal processing with (maximum) FFT or IFFT size based on a radio frequency (RF) bandwidth (e.g., for signal filtering and RF processing, that supports signals transmitted in its allocated bandwidth) .
[0116] To reduce cost and increase spectrum (usage) efficiency, operators or RATs may share spectrum, where un-occupied spectrum in one operator or RAT may be used by another operator or RAT; one scheme, for example, the un-occupied spectrum or a portion of spectrum in one CC (e.g., CC1) may be re-allocated or reconfigured to another CC (e.g., CC2, with a need of spectrum) for usage; this additional spectrum (e.g., the un-occupied spectrum) may be used (e.g., in CC2) by scheduling with a direct usage (e.g., spectrum in CC1) , multi-CC (e.g., CC1, CC2) carrier aggregation or dual connectivity.
[0117] A few carrier scenarios are considered. In one scenario, CC1, CC2 and CC3 are intra-band contiguous carriers, where CC1, CC2 and CC3 are within the same frequency band and are adjacent to each other. In another scenario, CC1, CC2 and CC3 are intra-band non-contiguous carriers, where CC1, CC2 and CC3 are within the same frequency band and there is a spectrum gap or guard band between two neighboring CCs among them. In other examples, CC1, CC2 and CC3 are inter-band non-contiguous carriers, where CC1, CC2 and CC3 are in different frequency bands and there is a spectrum gap or guard band between two neighboring CCs among them.
[0118] In the present disclosure, true single carrier like dynamical spectrum sharing is proposed. A bandwidth of a V-CC is adjustable or configurable upon demand, e.g., based on operation time (e.g., day time, night time, etc. ) , traffic loading, traffic type, service type, traffic balances among operators, or / and power saving mode, etc., which makes the spectrum usage and sharing very flexible. As shown in FIG. 8, the available spectrum is adjustable / configurable over V-CCs for spectrum sharing among different operators / RATs, which may be done adaptively on demand. Such a scheme is considered like dynamic spectrum sharing in a (true) single carrier, where a V-CC (e.g., V-CC2) may configure a maximum FFT size, that is large enough to support the single CC operation. A larger RF bandwidth (than RF bandwidth in support of equally divided spectrum in FIG. 7) may be configured or tuned to support larger FFT size and larger (channel or transmission) bandwidth, for example, for Operator2 or RAT2 in operation with V-CC2 in FIG. 8.
[0119] In some embodiments, spectrum sharing with V-CC reconfiguration or adjustment is addressed. In certain time period or scenario, one operator or RAT in an operator may have un-occupied or unused spectrum (e.g., due to less traffic loading or service activity) , which may be shared with or used by another operator or another RAT of the operator to make more efficient usage of the un-occupied / unused spectrum. Thus, a first V-CC (e.g., V-CC1 in FIG. 8) may be adjusted or reconfigured with smaller transmission or processing bandwidth, and a second V-CC (e.g., V-CC2 in FIG. 8) may be adjusted or reconfigured with larger transmission or processing bandwidth to allow for virtual single CC operation, where the virtual single CC operation, for example, is to perform single FFT operation with spectrum sharing over multiple CCs. In other embodiments, a (frequency) bandwidth for DL or UL in a V-CC may be different. DL bandwidth or UL bandwidth and its associated parameters such as supported maximum FFT size, numerology, etc., may be configured or indicated separately or independently.
[0120] Moreover, given an un-occupied / unused spectrum in the first V-CC, an amount of spectrum (up to the amount of the un-occupied / unused spectrum) in the first V-CC that is close to the spectrum of the second V-CC may be managed in use by the second V-CC (with some processing as needed, described below) . In this way, the operator or RAT in operation with the second V-CC may make use of the shared spectrum from the first V-CC and its own spectrum as one single resource block for flexible usage, such as resource scheduling, FFT operation or other control operation. As a result, this allows for virtual single CC operation with sharable spectrum in a cell of an operator or RAT.
[0121] After a (new or updated) bandwidth of a virtual CC (V-CC) is adjusted or configured, UEs in the V-CC cell may perform transmission and receptions accordingly based on the bandwidth and other associated parameters that may be also configured.
[0122] A flow of interaction between various network elements / devices in the above-mentioned communication system will be specifically described below by means of method embodiments or implementations. The method provided by the present disclosure may be applicable to the above-described communication system and specifically applied to various scenarios mentioned in the above-described communication system.
[0123] If un-occupied or unused frequency resources exist in first CC / RAT / carrier operator, while second CC / RAT / carrier operator does not have sufficient frequency resources, a portion of the un-occupied or unused frequency resources of the first CC / RAT / carrier operator may be shared with the second CC / RAT / carrier operator to improve the spectrum usage efficiency. In this case, a BS and a UE of the same CC / RAT / carrier operator may implement spectrum sharing by performing some interactive operations, such as updating one or more configuration parameters, and migrating spectrum.
[0124] FIG. 9 is a schematic flow chart of a communication method 900 in accordance with the present disclosure. The communication method 900 may be performed by a base station (BS) and a user equipment (UE) .
[0125] As shown in FIG. 9, the flow chart for the communication method 900 may include steps S901 and S902.
[0126] In step S901, the base station transmits first information for indicating one or more first parameters, where the one or more first parameters include a first frequency resource in a carrier component (CC for short, i.e., a first virtual CC) . Accordingly, the UE receives the first information.
[0127] The first information may be carried via any one of RRC / MAC / DCI signaling or any combination thereof.
[0128] The one or more first parameters of the first virtual CC further includes at least one of bandwidth information (for example the bandwidth and the starting / center frequency location) , bandwidth identity, Fourier Transform (FT) size, cyclic prefix, numerology, etc.
[0129] In some implementations, the FT may be any of Fast Fourier Transform (FFT) , Inverse Fast Fourier Transform (IFFT) , Discrete Fourier Transform (DFT) , and Inverse Discrete Fourier Transform (IDFT) .
[0130] In some implementations, the first frequency resource is shared with another CC, radio access technology (RAT) , carrier operator or BS.
[0131] In some implementations, the number of subcarriers in the first frequency resource is configurable.
[0132] In some implementations, as shown in FIGS. 10, 11 and 12, the first frequency resource may be a portion of frequency resources in the CC, which is partially or all already occupied or used, and need to be shared with another CC or component operator.
[0133] In some implementations, the one or more first parameters further include a guard band, and the guard band is at an edge of the first frequency resource or within the first frequency resource.
[0134] In some implementations, the guard band is configurable.
[0135] In some implementations, a minimum value of the guard band is zero.
[0136] For example, a size of a guard band between two adjacent virtual CCs in FIG. 7 and FIG. 8 may be less than a size of a guard band between two adjacent virtual CCs in FIG. 5 and FIG. 6 or even zero, depending RAT type, traffic, application, numerology, waveform type, etc., to further improve the spectrum usage efficiency.
[0137] In some other implementations, windowed Orthogonal Frequency Division Multiplexing (w-OFDM) or filtered-OFDM (f-OFDM) may be employed to further mitigate or remove inter CC interference.
[0138] In step S902, the BS transmits first scheduling information indicating a second frequency resource in the CC for communication, where the communication includes performing a spectrum shifting on an overlapped frequency resource between the first frequency resource and the second frequency resource. Accordingly, the UE receives the first scheduling information.
[0139] After receiving the first scheduling information, the UE communicates with the base station on the resources within the virtual CC according the first information.
[0140] In some implementations, the first scheduling information is transmitted via radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, downlink control information (DCI) signaling, or a combination thereof.
[0141] As shown in FIGS. 10 and 11, there are three V-CCs (V-CC1, V-CC2 and V-CC3) allocated for three operators or RATs, respectively. Here, Operator1 or RAT1 may use a first virtual CC to serve one or more UEs, Operator2 or RAT2 may use a second virtual CC to serve one or more UEs, and Operator3 or RAT3 may use a third virtual CC to serve one or more UEs. The operators or RATs may share the usage of spectrum mutually to enhance the spectrum usage efficiency or reduce implementation costs. In the present disclosure, as an example, the focus is on the first virtual CC used by Operator1 or RAT1, where its un-occupied spectrum may be used by another operator or RAT.
[0142] As shown in FIGS. 10 and 11, Operator1 or RAT1 with V-CC1 has un-occupied spectrum or un-used frequency resources (as shown in upper chart) . In this case, the un-occupied spectrum may be reused (with associated configurations and signal processing such as spectrum shifting in the Operator1 or RAT1) by Operator2 or RAT2 with V-CC2.
[0143] Accordingly, the base station shall inform the UEs in the V-CC1 cell about the adjustment of the first virtual CC.Thus, the first information may indicate one or more first parameters of first virtual CC, which may include at least one of updated bandwidth information (for example the bandwidth and the starting / center frequency location) , bandwidth identity, FFT size, cyclic prefix, numerology, spectrum adjustment information, or a grace period for the application of the adjusted first virtual CC, etc.
[0144] In one scenario, the un-occupied spectrum (the 1st frequency resource as shown in FIG. 10) in V-CC1 is directly adjacent to the spectrum of the V-CC2 which is shown in FIG. 10. In this scenario, the un-occupied spectrum of V-CC1 may be shared and configured to use by another operator or another RAT in operation with the second V-CC. As a result, the operator or RAT in operation with the second V-CC may consider the shared spectrum from the first V-CC and its own spectrum as one single resource block for flexible usage, such as resource scheduling, FFT operation or other control operation. As a result, this allows for virtual single CC operation with sharable spectrum in a cell of an operator or RAT; moreover, the operator or the RAT in operation with first V-CC may need to maintain its own normal operation for UEs (User equipment) in the first virtual CC cell.
[0145] As an example, in FIG. 10, there are three V-CCs (V-CC1, V-CC2 and V-CC3) allocated for three operators or RATs, respectively. Operator1 or RAT1 with V-CC1 has un-occupied spectrum (the 1st frequency resource as shown in upper chart) , which is directly adjacent to the spectrum of Operator2 or RAT2 with V-CC2. In this case, the un-occupied spectrum of V-CC1 may be shared the un-occupied spectrum readily with Operator2 or RAT2 with V-CC2 (as shown in lower chart) . Associated operations and / or configurations are given below.
[0146] Certain considerations may be taken into account for V-CC1 as follows.
[0147] In one possible implementation, there may be slow spectrum sharing among operators or a fast spectrum sharing among RATs within one operator.
[0148] A size of a guard band between two adjacent virtual CCs may be small or even zero, depending RAT type, traffic, application, numerology, waveform type, etc. In some other embodiments, windowed OFDM (w-OFDM) or filtered-OFDM (f-OFDM) may be employed to further mitigate or remove inter CC interference.
[0149] In another possible implementation, as the un-occupied spectrum in V-CC1 is shared with V-CC2, its own bandwidth size for transmission is reduced, thus an actual bandwidth may need to be adjusted accordingly.
[0150] Parameters associated with a (channel or transmission) bandwidth may be (re) configured or updated for UEs in the V-CC1 cell, where the parameters may include at least one updated bandwidth information (for example the bandwidth and the starting / center frequency location) , bandwidth identity, FFT size, cyclic prefix, numerology, spectrum adjustment information, or a grace period for the application of the adjusted first virtual CC, etc. ; moreover or alternatively, resource blocks for scheduling may optionally need to be re-indexed based on the bandwidth information, applied numerology, FFT size, etc. In one possible implementation, the other associated parameters in the V-CC1 cell may include a grace period, which is a time window between the bandwidth (re) configuration / update message and starting to apply transmissions with the bandwidth.
[0151] A signaling on (re) configuring a (frequency) bandwidth and other related parameters such as spectrum processing option and a grace period addressed above is sent to UEs in the V-CC1 cell, where the signaling may be made in a semi-static way via higher-layer signaling such as Radio Resource Control (RRC) , Medium Access Control-Control Element (MAC-CE) , or in a dynamic way such via downlink control information (DCI) .
[0152] The signaling is from a base station of V-CC1 cell and may be system information message (such as SSB, SIB1 or other SIBs) , cell-common signaling, group common signaling, or UE specific signaling.
[0153] Moreover or alternatively, the occupied spectrum and thus a frequency bandwidth in V-CC1 cell may be adjusted based on factors such as operation time (e.g., day time, night time, etc. ) , traffic loading, traffic type, service type, traffic balances among operators or RATs, or / and power saving mode.
[0154] It will be noted that in FIG. 10, same processing and operation for spectrum sharing described above can be performed between V-CC2 and V-CC3.
[0155] In another scenario, the un-occupied spectrum (the 3rd frequency resource shown in the figure) in V-CC1 is not directly adjacent or not close to the spectrum of the V-CC2 which is shown in FIG. 11, and the to be shared spectrum (1st frequency resource shown in the FIG. 11) is adjacent close to the spectrum of the V-CC2.
[0156] In this scenario, one possible implementation is that a portion or all of the un-occupied spectrum of V-CC1 may swap (i.e., exchanging of two spectrum portions (the 1st frequency resource and the 3rd frequency resource) for usage in the first V-CC) with an equivalent amount of spectrum (of V-CC1) that is adjacent to the spectrum of V-CC2 (as shown in middle chart in FIG. 11) , where the swapping parameters may indicate spectrum adjustment information, including one or more of frequency resources of the un-occupied spectrum, how much spectrum shared with the V-CC2, spectrum location to swap to, what OFDM wave form is used, etc.
[0157] As a result, the operator or RAT in operation with the second V-CC may consider the shared spectrum from the first V-CC and its own spectrum as one single resource block for flexible usage, such as resource scheduling, FFT operation or other control operation. As a result, this allows for virtual single CC operation with sharable spectrum in a cell of an operator or RAT; moreover, the operator or the RAT in operation with first V-CC may need to maintain its own normal operation for UEs in the first virtual CC cell.
[0158] Associated operations and / or configurations for swap are given below.
[0159] In V-CC1, the occupied spectrum (the first frequency resource as shown in upper chart) directly adjacent to the spectrum of V-CC2 may have the frequency resource for ongoing usage, e.g., periodic resources for DL or UL transmissions, etc. Thus, this portion of spectrum has to be maintained and managed when swapping with the un-occupied spectrum (the third frequency resource as shown in upper and middle charts) , with an associated processing to keep V-CC1 normal operation for UEs in the V-CC1 cell. Moreover or alternatively, associated considerations may be taken into account for V-CC1 as follows.
[0160] A minimum frequency bandwidth may be defined or configured for Operator1 or RAT1, e.g., important messages such as Synchronization Signal Block (SSB) , initial access, and control signaling / notification (such as DCI, and paging) .
[0161] In some implementations, there may be slow spectrum sharing among operators or a fast spectrum sharing among RATs within one operator.
[0162] A size of a guard band between two adjacent virtual CCs may be small or even zero, depending RAT type, traffic, application, numerology, waveform type, etc. In some other embodiments, windowed Orthogonal Frequency Division Multiplexing (w-OFDM) or filtered-OFDM (f-OFDM) may be employed to further mitigate or remove inter CC interference.
[0163] A (frequency) bandwidth and other associated parameters may be (re) configured or updated in V-CC1, where resource blocks for scheduling may optionally need to be re-indexed based on the bandwidth, and other associated parameters may optionally include FFT size. In some embodiments, the other associated parameters in the V-CC1 cell may include a grace period, which is a time window between the bandwidth (re) configuration / update message and starting to apply transmissions with the bandwidth.
[0164] A signaling on (re) configuring a (frequency) bandwidth and other related parameters such as spectrum processing option and a grace period addressed above is sent to UEs in the V-CC1 cell, where the signaling may be made in a semi-static way via higher-layer signaling such as Radio Resource Control (RRC) , Medium Access Control-Control Element (MAC-CE) , or in a dynamic way such via downlink control information (DCI) .
[0165] The signaling is from a base station of V-CC1 cell and may be system information message (such as SSB, SIB1 or other SIBs) , cell-common signaling, group common signaling, or UE specific signaling.
[0166] Another possible implementation of the sharing on un-occupied and non-adjacent spectrum is spectrum shifting: all or part of occupied spectrum in V-CC1 may be shifted toward left-hand side with an amount (up) to the un-occupied spectrum, leaving the amount of spectrum of V-CC1 that is adjacent to spectrum of V-CC2 available for use by V-CC2. Either shifting spectrum like this or swapping spectrum described above may be configurable (with configuration or indication scheme described below, e.g., by a signaling) .
[0167] Moreover or alternatively, the occupied spectrum and thus a frequency bandwidth in V-CC1 cell may be adjusted based on factors such as operation time (e.g., day time, night time, etc. ) , traffic loading, traffic type, service type, traffic balances among operators or RATs, or / and power saving mode.
[0168] It will be noted that in FIG. 11, same processing and operation for spectrum sharing described above may be performed between Operator2 and Operator3 or between RAT2 and RAT3 in operation with V-CC2 and V-CC3, respectively.
[0169] Please note the first information may indicate which of the swap and shift is used for the virtual adjustment of spectrum sharing, which is the configured / indicated parameter of spectrum adjustment information. The UE communicates with the base station on the resources within the updated virtual CC according to the first information.
[0170] After the UE receives the first scheduling information, the BS and the UE perform the spectrum shifting on the overlapped frequency resource, and communicate with each other on a fourth frequency resource.
[0171] In some implementations, the spectrum shifting includes direct spectrum shifting or cyclic spectrum shifting.
[0172] FIG. 12A illustrates an example of spectrum shifting. FIG. 12B illustrates another example of spectrum shifting. As shown in FIGS. 12A and 12B, the spectrum shifting is the cyclic spectrum shifting, and performing the spectrum shifting, includes:
[0173] moving a mapping for signal components from the overlapped frequency resource to a third frequency resource, where the third frequency resource does not belong to the second frequency resource, and the mapping for remaining signal components to remaining frequency resource of the second frequency resource is kept unchanged.
[0174] As shown in FIGS. 12A and 12B, the first frequency resource is directly adjacent to the second CC, and there is an overlapped frequency resource between the first frequency resource and the second frequency resource configured to the UE in first CC cells. In other words, at least a portion of the first frequency resource is occupied. In order to share the first frequency resource to the second CC, a mapping for signal components may be moved from the overlapped frequency resource to un-occupied frequency resource in the first CC, such as the third frequency resource by cyclic spectrum shifting, where the third frequency resource has an equal or equivalent amount of frequency resource to the overlapped frequency resource.
[0175] In some implementations, an order of the mapping for the signal components on the third frequency resource is the same as an order of the mapping for the signal components on the overlapped frequency resource, and the third frequency resource is located right at an end of the second frequency resource.
[0176] In other word, if the mapping for the signal components on the overlapped frequency resource is from low to high frequencies, then the mapping for the signal components on the third frequency resource is still from low to high frequencies, and vice versa.
[0177] In one case, as shown in FIG. 12A, the first frequency resource is located on right end of the second frequency resource, and thus the third frequency resource will be located at the left end of the second resource. In other words, the first frequency resource is the rightmost portion of the second frequency resource, and the third frequency resource is located at the left-side of the second resource and does not belong to the second resource.
[0178] In another case, as shown in FIG. 12B, the first frequency resource is located on left end of the second frequency resource, and thus the third frequency resource will be located at the right end of the second resource. In other words, the first frequency resource is the leftmost portion of the second frequency resource, and the third frequency resource is located at the right-side of the second resource and does not belong to the second resource. It is equivalent to a scenario in FIG. 12A that (the frequency resource in) 1st CC is located at the right-side of (the frequency resource in) 2nd CC, where a leftmost portion of the frequency resource in the 1st CC is to share (to its left side or lower frequency CC) with the 2nd CC.
[0179] In some implementations, the cyclic spectrum shifting is applicable for Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) or Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) signal, which is not limited by the present disclosure.
[0180] As shown in FIGS. 12A and 12B, the spectrum shifting is the direct spectrum shifting, and performing the spectrum shifting, includes:
[0181] moving a mapping for signal components from the second frequency resource to a fourth frequency resource in the CC, where the fourth frequency resource is not overlapped with the first frequency resource.
[0182] As shown in FIGS. 12A and 12B, the first frequency resource is adjacent to the second CC, and there is an overlapped frequency resource between the first frequency resource and the second frequency resource configured to the UE in the first CC cells. In other words, a portion of the first frequency resource is occupied. In order to share the first frequency resource to the second CC, the mapping for the signal components may be moved from the second frequency resource to the fourth frequency resource in the first CC by the direct spectrum shifting, where the fourth frequency resource has an equal or equivalent amount of frequency resource to the second frequency resource.
[0183] In some implementations, the overlapped frequency resource may be a portion of the first frequency resource. In this case, the first frequency resource and the second frequency resource are partially overlapped, as illustrated in FIGS. 12A and 12B.
[0184] In another implementations, the overlapped frequency resource may be all of the first frequency resource (not illustrated in FIGS. 12A and 12B) . In this case, the first frequency resource belongs to the second frequency resource, and the above mentioned direct spectrum shifting also applies.
[0185] In some implementations, the direct spectrum shifting is to keep a frequency resource mapping order for signal components on the fourth frequency resource same as a resource mapping order for the signal components on the second frequency resource, to reduce a peak-to-average ratio (PAPR) of OFDM signals generated by the signal components.
[0186] In other word, if the mapping for the signal components on the second frequency resource is from low to high frequencies, then the mapping for the signal components on the fourth frequency resource is still from low to high frequencies, and vice versa.
[0187] In some implementations, the direct spectrum shifting is applicable for Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) or Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) signal.
[0188] In some implementations, the direct spectrum shifting on the second frequency resource is based on a frequency resource shift offset, and frequency resource shift offset is configurable. Take FIG. 12A as an example, assuming the lowest frequency of the second frequency resource is FL and the highest frequency of the second frequency resource is FH, then after moving, the new lowest frequency will be FL + frequency resource shift offset and the highest frequency will be FH +frequency resource shift offset.
[0189] In some implementations, the frequency resource shift offset is determined based on a size of the overlapped frequency resource.
[0190] In some implementations, the absolute value of the frequency resource shift offset is equal to or greater than the size of the overlapped frequency resource.
[0191] In some implementations, an absolute value of the frequency resource shift offset is positively correlated with the size of the overlapped frequency resource. In other words, the greater the number of overlapped frequency resources, the greater the number of DIRECT moves.
[0192] It should be pointed out that FIGS. 12A and 12B illustrate mapping operation at a transmitting side only. Corresponding to the mapping operation at the transmitting side, an inverse mapping operation is made at a receiving side where frequency domain signal components after FT processing may perform a reverse mapping to recover to an original order of transmission-side signal components before the spectrum shifting.
[0193] In direct spectrum shifting scenario, the inverse mapping operation is to (directly) shift the frequency domain signal components back to its original frequency mapping locations (at transmit side) , and then perform signal detection such as demodulation, decoding, etc. ; in cyclic spectrum shifting scenario, the inverse mapping operation is to (cyclically) shift the frequency domain signal components back to its original frequency mapping locations (at transmit side) , and then perform inversion DFT to obtain transformed signal components for further signal detection such as demodulation, decoding, etc.
[0194] For example, in downlink transmission, the transmitting side may be a BS, and the receiving side may be a UE. In uplink transmission, the transmitting side may be a UE, and the receiving side may be a BS. In sidelink transmission, the transmitting side may be a UE, and the receiving side may be another UE.
[0195] FIG. 13 illustrates another example of moving a mapping of signal components on the first frequency resource to the third frequency resource. As shown in FIG. 13, assuming that the first CC contains 12 resource blocks (RBs) with RB indexes 0 to 11, 8 signal component groups with indexes 0 to 7 (each of which consists of 12 signal components) are mapped to RBs with RB indexes 4 to 11 from left to right, respectively; and RBs with RB indexes 0 to 3 are un-occupied. The first frequency resource includes 2 RBs with RB indexes of 10 and 11 (i.e., the first frequency resource is a subset of the second frequency resource, and the first frequency resource is the overlapped frequency resource) . The third frequency resource includes 2 RBs with RB indexes 0 and 1, then the spectrum mirror-swapping is performed between the third frequency resource and the first frequency resource. Here, a mapping order of signal component groups 6 and 7 on the first frequency resource is in mirror symmetry with a mapping order of the signal component groups 6 and 7 on the third frequency resource, and a mapping order of remaining signal component groups 0 to 5 is unchanged on the remaining frequency resources (i.e., RBs with RB indexes 4 to 9) in the second frequency resource.
[0196] In some implementations, spectrum sharing among radio access technologies over multiple virtual CCs described in previous paragraphs may be applied to 4G, 5G and other networks.
[0197] In upper chart of FIG. 14, there V-CCs are used an example for operations of 4G and other networks, where the multiple virtual CCs may be adaptively or dynamically shared by 4G and the other networks, with 4G network in operation with V-CC1 and the other network in operation with V-CC2 and V-CC3.
[0198] In middle chart of FIG. 14, there V-CCs are used an example for operations of 4G, 5G and other networks, where the multiple virtual CCs may be adaptively or dynamically shared by 4G, 5G and the other networks, with 4G network in operation with V-CC1, the other network in operation with V-CC2, and 5G network in operation with V-CC3. It is also possible (not shown in the figure) that 4G and 5G RATs may be in operation with two adjacent V-CCs to share the spectrum adaptively or dynamically.
[0199] In lower chart of FIG. 14, there V-CCs are used an example for operations of 5G and other networks, where the multiple virtual CCs may be adaptively or dynamically shared by 5G and the other networks, with 5G network in operation with V-CC1 and the other network in operation with V-CC2 and V-CC3.
[0200] It will be noted that radio access technologies and networks (e.g., 4G, 5G, etc. ) in the figure may be belong to one or different operators. Same RAT networks such as 6G may apply same spectrum sharing scheme over different virtual CCs, for example, V-CC2 / 6G and V-CC3 / 6G, as shown in FIG. 14.
[0201] It will be noted that in the above S901 and S902, the configured bandwidth information and FT size may be kept unchanged or not configured. In other words, although the first frequency resource has been shared to another CC or RAT or operator, the system bandwidth configured by the base station for the UE in the CC cell still includes the first frequency resource. In this case, the base station and UE in that CC cell may map signal components originally mapped on the first frequency resource on other frequency resources (such as the third frequency resource mentioned above) that are not occupied in the CC by spectrum shifting, and map 0-value signal components (which may also be referred to as dummy signal components) on the first frequency resource; and, alternatively, FT coefficients corresponding to the first frequency resource may be set to 0, i.e., the base station and UEs in the CC cell do not transmit valid data on the first frequency resource. Accordingly, a BS and a UE of another CC or RAT or operator may transmit data on the first frequency resource, such as by using the first frequency resource in any one of the following ways: combining the first frequency resource with own frequency resource of another CC or RAT or operator to form a larger frequency resource to support larger FT size, carrier aggregation (CA) , or dual connectivity (DC) , so as to share the first frequency resource to that another CC or RAT or operator, without introducing interference between that CC and that another CC or RAT or operator.
[0202] In some implementations, as shown in FIG. 9, the communication method 900 further includes steps S903 and S904:
[0203] In step S903, the base station transmits second information indicating adjustment of the first virtual CC, i.e., indicating one or more second parameters, where the one or more second parameters include at least one of the following parameters: channel bandwidth of the CC, frequency resource allocations, frequency resource index, numerology, etc. Accordingly, the UE receives the second information.
[0204] In some embodiments, the second information is transmitted via radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, downlink control information (DCI) signaling, or a combination thereof.
[0205] In step S904, the BS transmits second scheduling information indicating a fifth frequency resource for the communication based on the second information, where the communication includes at least one of downlink (DL) transmission or uplink (UL) transmission. Accordingly, the UE receives the second scheduling information.
[0206] In some embodiments, the second scheduling information is transmitted via radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, downlink control information (DCI) signaling, or a combination thereof.
[0207] It will be noted that if in S901, if the first information includes bandwidth information, the channel bandwidth of the CC in S903 may be regarded as an updated bandwidth information. In other words, after the spectrum shifting is performed to complete the sharing of the first frequency resource, the base station may configure a larger or smaller bandwidth, such as a bandwidth corresponding to the fifth frequency resource, for a UE in that CC cell via the second information.
[0208] After the UE receives the second scheduling information, the BS and the UE perform the second communication based on the second information spectrum shifting on the overlapped frequency resource for maintaining the communication with each other on a new frequency resource, where the new frequency resource includes the remaining frequency resource in the second frequency resource except for the first frequency resource.
[0209] Based on the communication method 900 addressed above, when the first frequency resource in a CC needs to be used for other purposes, e.g., when the first spectrum resource needs to be shared to other CCs or other operators or other RATs or other BSs, the second frequency resource may be configured for the UEs in that CC cell to maintain normal communication between the BS and the UE. When the first frequency resource has been partially or fully occupied and there is an overlapped frequency resource between the second frequency resource and the first frequency resource, a spectrum shifting may be performed on that overlapped frequency resource to migrate a UE from the first frequency resource to another idle frequency resource in that CC, in order to share the first frequency resource to other CCs or other operators or other BSs, which may ensure the BS communicates normally with the UEs in that CC cell, and improve the spectrum usage efficiency.
[0210] The present disclosure encompasses various embodiments, including not only method embodiments, but also other embodiments such as apparatus embodiments and embodiments related to non-transitory computer-readable storage media. Embodiments may incorporate, individually or in combinations, the features disclosed herein.
[0211] In some aspects of the present disclosure, there is provided a communication apparatus / chipset system including means (e.g., at least one processor) to implement a method implemented by (or at) a UE of the present disclosure. The communication apparatus / chipset system may be the UE (that is, a terminal device) or a module / component in the UE. In details, the at least one processor may execute instructions stored in a computer-readable storage medium to implement the method.
[0212] In some aspects of the present disclosure, there is provided a communication apparatus / chipset system including means (e.g., at least one processor) to implement the method implemented by (or at) a network device (e.g., base station) of the present disclosure. The communication apparatus / chipset system may be the network device or a module / component in the network device. In details, the at least one processor may execute instructions stored in a computer-readable storage medium to implement the method.
[0213] A communication apparatus 1500, as shown in FIG. 15, includes a processor 1501 and a communication interface 1502. The processor 1501 is connected to the communications interface 1502. The processor 1501 is configured to cause the communication apparatus 1500 to perform any of the methods described above, and the communications interface 1502, i.e., a transceiver, is configured to communicate with other network elements under the control of the processor 1501. In some examples, the communication apparatus 1500 may further include a memory 1503, which is configured to store apparatus program code (or instructions) and / or data.
[0214] In some examples, the communications interface 1502 is an interface circuit configured to communicate with another component. For example, the interface circuit may communicate a signal to other apparatus / system such as a radio frequency processing apparatus, or processor system.
[0215] In some embodiments, there is provided a communication apparatus to perform any of the methods in the embodiments of the present disclosure. The communication apparatus may include corresponding modules or units configured to implement methods and / or embodiments described herein. In some embodiments, as shown in FIG. 16, a communication apparatus 1600 includes a transmitting unit 1601, a receiving unit 1602 and a processing unit 1603. In some examples, the communication apparatus 1600 may further include a storage unit 1604 configured to store apparatus program code (or instructions) and / or data.
[0216] For the function and realization of the transmitting unit 1601, the receiving unit 1602, the processing unit 1603 and the storage unit 1604, reference may be made to the description of the relevant units or modules described above, which will not be repeated here.
[0217] FIG. 17 illustrates an example apparatus 410 according to an implementation of the present disclosure. The apparatus 410 may be a communication device or an apparatus implemented in a communication device such as the ED 110 or the TRPs 170a, 170b, 172. For example, the apparatus 410 implemented in an ED may be an integrated circuit, which in some instances may be referred to as a chip, a modem, a modem chip, a baseband chip, or a baseband processor. In some implementations, one or more integrated circuits can be packaged into a system-on-chip, a system-in-package, or a multi-chip module. The apparatus 410 can include one or more integrated circuits and other discrete components. In some implementations, the apparatus 410 may be a module within the ED 110, or within the apparatus 310. In some implementations, the apparatus 410 may be a module within one of the TRPs 170a, 170b, 172, or the apparatus 320a or 320b.
[0218] In an example, the apparatus 410 may include one or more processors 411, and an interface circuit 412. The apparatus 410 may further include a memory 413. The one or more processors 411 are configured to process signals and execute one or more communication protocols. The memory 413 is configured to store at least a part of corresponding computer program instructions and / or data. In an example, the one or more processors 411 execute the computer program instructions stored in the memory 413 to implement related operations (for example, inputting, outputting, receiving, and transmitting) in the method embodiments disclosed herein. In some implementations, the memory 413 being configured to store the corresponding computer program instructions and / or data may mean that the memory 413 is configured to store all of the corresponding computer program instructions and / or data for execution by the one or more processors 411. In some implementations, the memory 413 being configured to store the corresponding computer program instructions and / or data may mean that the memory 413 is configured to store a part of the corresponding computer program instructions and / or data. For example, the part of the corresponding computer program instructions and / or data may include computer program instructions and / or data that need to be currently executed by the one or more processors 411. Thus, the memory 413 may store different parts of computer program instructions and / or data for a plurality times for the one or more processors 411 to perform related operations in the method embodiments disclosed herein. As a communication interface, the interface circuit 412 is configured to implement communication with another component. For example, the interface circuit 412 may communicate a signal with other apparatus / system such as a radio frequency processing apparatus, or processor system. The communication includes transmitting signal (or data, information) to another component or device, or receives signal from another component or device. “transmitting” includes outputting the signal to a component or device that is directly or indirectly coupled to the interface circuit (transmitting unit) . “receiving” includes inputting or obtaining a signal from a component or device that is directly or indirectly coupled to the interface circuit (receiving unit) . Optionally, to reduce a load of the one or more processors, a baseband signal processing circuit 414 may be also disposed to implement processing of at least a part of baseband signals, including signal demodulation, modulation, encoding, decoding, or the like.
[0219] The apparatus 410 may be the processor 210 (or 260) within the apparatus 310 (or 320) , in some scenarios, or may be included within the processor 210 (or 260) within the apparatus 310 (or 320a or 320b) in some scenarios. The apparatus 410 may be a baseband chip or may include a baseband chip. In some implementations, the apparatus 410 may be independently packaged into a chip. In some implementations, the apparatus 310 (or 320a or 320b) includes different types of chips. The apparatus 410 may be packaged into a processor chip (for example, an SoC chip or an SIP chip) with the different types of chips. In some implementations, the apparatus 410 may be packaged into a chip with some or all of circuits of a radio frequency processing system that may further be included in the apparatus 310 (or 320a or 320b) .
[0220] In some aspects of the present disclosure, there is provided a communication system including at least one of an apparatus in (or at) a UE of the present disclosure, or an BS in (or at) a network device of the present disclosure, as described above.
[0221] In some aspects of the present disclosure, there is provided a communication method performed by a system including at least one of an apparatus in (or at) a UE of the present disclosure, and an apparatus in (or at) a network device of the present disclosure.
[0222] In some aspects of the present disclosure, there is provided a computer program including instructions. The instructions, when executed by a processor, may cause the processor to implement a communication method of the present disclosure.
[0223] In some aspects of the present disclosure, there is provided a non-transitory computer-readable storage medium storing instructions, the instructions, when executed by a processor, may cause the processor to implement a method of the present disclosure.
[0224] The solutions described in the present disclosure are applicable to a next generation network, or a legacy (e.g., 5G, 4G, 3G or 2G) network.
[0225] It will be appreciated that any module, component, or device disclosed herein that executes instructions may include, or otherwise have access to, a non-transitory computer / processor-readable storage medium or media for storage of information, such as computer / processor-readable instructions, data structures, program modules and / or other data. A non-exhaustive list of examples of non-transitory computer / processor readable storage media includes magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, optical disks such as compact disc read-only memory (CD-ROM) , digital video discs or digital versatile discs (i.e., DVDs) , Blu-ray DiscTM, or other optical storage, volatile and non-volatile, removable and non-removable media implemented in any method or technology, random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable read-only memory (EEPROM) , flash memory or other memory technology. Any such non-transitory computer / processor-readable storage media may be part of a device / apparatus or accessible or connectable thereto. Computer / processor-readable / executable instructions to implement a method, an application or a module described herein may be stored or otherwise held by such non-transitory computer / processor readable storage media.
[0226] It will be noted that the message in the present disclosure may be replaced with information, which may be carried in one single message, or be carried in more than one separate messages.
[0227] Without special noting, the terms "apparatus" and "device" are used exchangeable, and the terms "identity" and "identifier" are sued exchangeable.
[0228] In the present disclosure, the word "a" or "an" when used in conjunction with the term "comprising" or "including" in the claims and / or the specification may mean "one" , but it is also consistent with the meaning of "one or more" , "at least one" , and "one or more than one" unless the content clearly dictates otherwise. Similarly, the word "another" may mean at least a second one or more unless the content clearly dictates otherwise.
[0229] In the present disclosure, the words "first" , "second" , etc., when used before a same term (e.g., ED, or an operating step) does not mean an order or a sequence of the term. For example, the "first ED" and the "second ED" , means two different EDs without specially indicated, and similarly, the "first step" and the "second step" means two different operating steps without specially indicated, but does not mean the first step have to happen before the second step. The real order depends on the logic of the two steps.
[0230] The terms "coupled" , "coupling" or "connected" as used herein can have several different meanings depending on the context in which these terms are used. For example, as used herein, the terms "coupled" , "coupling" , or "connected" can indicate that two elements or devices are directly connected to one another or connected to one another through one or more intermediate elements or devices via a mechanical element depending on the particular context.
[0231] Note that the expression "at least one of A or B" , as used herein, is interchangeable with the expression "Aand / or B" . It refers to a list in which A, or B, or both A and B may be selected. Similarly, "at least one of A, B, or C" , as used herein, is interchangeable with "Aand / or B and / or C" or "A, B, and / or C" . It refers to a list in which A or B or C, or both A and B, or both A and C, or both B and C, or all of A, B and C, may be selected. The same principle applies for longer lists having a same format.
[0232] The term "receive" , "detect" and "decode" as used herein can have several different meanings depending on the context in which these terms are used. For example, without special note, the term "receive" may indicate that information (e.g., DCI, or MAC-CE, RRC signaling or TB) is received successfully by the receiving node, which means a receiving side correctly detect and decode it. In this scenario, "receive" may cover "detect" and "decode" or may indicates same thing, e.g., "receiving paging" means decoding paging correctly and obtaining the paging successfully, and accordingly, "the receiving side not receive paging" means the receiving side does not detect and / or decoding the paging. For example, "paging being not received" means the receiving side tries to detect and / or decoding the paging, but not obtain the paging successfully. The term "receive" may sometimes indicate that a signal arrives at the receiving side, but does not mean the information in the signal is detected and decoded correctly, then the receiving side need perform detecting and decoding on the signal to obtain the information carried in the signal. In this scenario, "receive" , "detect" and "decode" may indicate different procedure at receiving side to obtain the information.
[0233] Although the present disclosure refers to illustrative embodiments, this is not intended to be construed in a limiting sense. Various modifications and combinations of the illustrative embodiments, as well as other embodiments of the disclosure, will be apparent to persons skilled in the art upon reference to the description. When combining two or more embodiments, not all the features in the embodiments to be combined are necessary for the combination.
[0234] Features disclosed herein in the context of any particular embodiments may also or instead be implemented in other embodiments. Method embodiments, for example, may also or instead be implemented in apparatus, system, and / or computer program product embodiments. In addition, although embodiments are described primarily in the context of methods and apparatus, other implementations are also contemplated, as instructions stored on one or more non-transitory computer-readable media, for example. Such media could store programming or instructions to perform any of various methods consistent with the present disclosure.
Claims
1.A communication method, comprising:transmitting first information for indicating one or more first parameters, wherein the one or more first parameters comprise a first frequency resource in a component carrier (CC) ; andtransmitting first scheduling information indicating a second frequency resource in the CC for communication, wherein the communication comprises performing a spectrum shifting on an overlapped frequency resource between the first frequency resource and the second frequency resource.2.The method of claim 1, wherein the spectrum shifting comprises direct spectrum shifting or cyclic spectrum shifting.3.The method of claim 2, wherein the spectrum shifting is the cyclic spectrum shifting, and the performing the spectrum shifting comprises:moving a mapping for signal components from the overlapped frequency resource to a third frequency resource, wherein the third frequency resource does not belong to the second frequency resource, and the mapping for remaining signal components to remaining frequency resource of the second frequency resource is kept unchanged.4.The method of claim 3, wherein an order of the mapping for the signal components on the third frequency resource is same as an order of the mapping for the signal components on the overlapped frequency resource, and the third frequency resource is located right at an end of the second frequency resource.5.The method of any one of claims 2 to 4, wherein the cyclic spectrum shifting is applicable for discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) signal or cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) signal.6.The method of claim 2, wherein the spectrum shifting is the direct spectrum shifting, and the performing the spectrum shifting comprises:moving a mapping for signal components from the second frequency resource to a fourth frequency resource in the CC, wherein the fourth frequency resource is not overlapped with the first frequency resource.7.The method of claim 6, wherein the direct spectrum shifting is to keep a frequency resource mapping order for signal components on the fourth frequency resource same as a resource mapping order for the signal components on the second frequency resource.8.The method of any one of claims 2, 6 or 7, wherein the direct spectrum shifting is applicable for cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) signal or discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) signal.9.The method of any one of claims 2 to 8, wherein the direct spectrum shifting on the overlapped frequency resource between the first frequency resource and the second frequency resource is based on a frequency resource shift offset.10.The method of claim 9, wherein the frequency resource shift offset is determined based on a size of the overlapped frequency resource.11.The method of claim 10, wherein an absolute value of the frequency resource shift offset is equal to or greater than the size of the overlapped frequency resource.12.The method of claim 10, wherein an absolute value of the frequency resource shift offset is positively correlated with the size of the overlapped frequency resource.13.The method of any one of claims 1 to 12, further comprising:transmitting second information for indicating one or more second parameters, wherein the one or more second parameters comprise at least one of following parameters: channel bandwidth of the CC, frequency resource allocations, frequency resource index, numerology; andtransmitting second scheduling information indicating a fifth frequency resource for the communication based on the second information, wherein the communication comprises at least one of downlink (DL) transmission or uplink (UL) transmission.14.The method of claim 13, wherein the first information or the second information is transmitted via radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, downlink control information (DCI) signaling, or a combination thereof.15.The method of any one of claims 1 to 14, wherein the first frequency resource is shared with another CC, radio access technology (RAT) or carrier operator.16.The method of any one of claims 1 to 15, wherein a number of subcarriers in the first frequency resource is configurable.17.The method of any one of claims 1 to 16, wherein the one or more first parameters further comprise Fourier Transform (FT) size.18.The method of claim 17, wherein the FT is any one of Fast Fourier Transform (FFT) , Inverse Fast Fourier Transform (IFFT) , Discrete Fourier Transform (DFT) , and Inverse Discrete Fourier Transform (IDFT) .19.The method of any one of claims 1 to 18, wherein the one or more first parameters further comprise a guard band, and the guard band is at an edge of the first frequency resource or within the first frequency resource.20.The method of claim 19, wherein the guard band is configurable.21.The method of claim 19 or 20, wherein a minimum value of the guard band is zero.22.A communication method, comprising:receiving first information for indicating one or more first parameters, wherein the one or more first parameters comprise a first frequency resource in a carrier component (CC) ; andreceiving first scheduling information indicating a second frequency resource in the CC for communication, wherein the communication comprises performing a spectrum shifting on an overlapped frequency resource between the first frequency resource and the second frequency resource.23.The method of claim 22, wherein the spectrum shifting comprises direct spectrum shifting or cyclic spectrum shifting.24.The method of claim 23, wherein the spectrum shifting is the cyclic spectrum shifting, and the performing the spectrum shifting comprises:moving a mapping for signal components from the overlapped frequency resource to a third frequency resource, wherein the third frequency resource does not belong to the second frequency resource, and the mapping for remaining signal components to remaining frequency resource of the second frequency resource is kept unchanged.25.The method of claim 24, wherein an order of the mapping for the signal components on the third frequency resource is same as an order of the mapping for the signal components on the overlapped frequency resource, and the third frequency resource is located right at an end of the second frequency resource.26.The method of any one of claims 23 to 25, wherein the cyclic spectrum shifting is applicable for discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) signal or cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) signal.27.The method of claim 23, wherein the spectrum shifting is the direct spectrum shifting, and the performing the spectrum shifting comprises:moving a mapping for signal components from the second frequency resource to a fourth frequency resource in the CC, wherein the fourth frequency resource is not overlapped with the first frequency resource.28.The method of claim 27, wherein the direct spectrum shifting is to keep a frequency resource mapping order for signal components on the fourth frequency resource same as a resource mapping order for the signal components on the second frequency resource.29.The method of any one of claims 23, 27 or 28, wherein the direct spectrum shifting is applicable for cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) signal or discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) signal.30.The method of any one of claims 23 to 29, wherein the direct spectrum shifting on the overlapped frequency resource between the first frequency resource and the second frequency resource is based on a frequency resource shift offset.31.The method of claim 30, wherein the frequency resource shift offset is determined based on a size of the overlapped frequency resource.32.The method of claim 31, wherein an absolute value of the frequency resource shift offset is equal to or greater than the size of the overlapped frequency resource.33.The method of claim 31, wherein an absolute value of the frequency resource shift offset is positively correlated with the size of the overlapped frequency resource.34.The method of any one of claims 22 to 33, further comprising:receiving second information for indicating one or more second parameters, wherein the one or more second parameters comprise at least one of following parameters: channel bandwidth of the CC, frequency resource allocations, frequency resource index, numerology; andreceiving second scheduling information indicating the fifth frequency resource for the communication based on the second information, wherein the communication comprises at least one of downlink (DL) transmission or uplink (UL) transmission.35.The method of claim 34, wherein the first information or the second information is received via radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, downlink control information (DCI) signaling, or a combination thereof.36.The method of any one of claims 22 to 35, wherein the first frequency resource is shared with another CC, radio access technology (RAT) or carrier operator.37.The method of any one of claims 22 to 36, wherein a number of subcarriers in the first frequency resource is configurable.38.The method of any one of claims 22 to 37, wherein the one or more first parameters further comprise Fourier Transform (FT) size.39.The method of claim 38, wherein the FT is any one of Fast Fourier Transform (FFT) , Inverse Fast Fourier Transform (IFFT) , Discrete Fourier Transform (DFT) , and Inverse Discrete Fourier Transform (IDFT) .40.The method of any one of claims 22 to 39, wherein the one or more first parameters further comprise a guard band, and the guard band is at an edge of the first frequency resource or within the first frequency resource.41.The method of claim 40, wherein the guard band is configurable.42.The method of claim 40 or 41, wherein a minimum value of the guard band is zero.43.A communication apparatus, comprising:a communication interface configured to communicate with other network elements under a control of at least one processor; andthe at least one processor configured to cause the communication apparatus to implement the method of any one of claims 1 to 21, or the method of any one of claims 22 to 42.44.A computer-readable storage medium having stored thereon computer program instructions that, when executed by a processing circuit of a computer, cause the computer to implement the method of any one of claims 1 to 21, or the method of any one of claims 22 to 42.45.A computer program product having instructions that, when executed by a computer, cause the computer to implement the method of any one of claims 1 to 21, or the method of any one of claims 22 to 42.46.A communication system comprising:a first apparatus for implementing the method of any one of claims 1 to 21; anda second apparatus for implementing the method of any one of claims 22 to 42.
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