Communication method and communication apparatus
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2023-11-29
- Publication Date
- 2026-07-08
AI Technical Summary
Existing communication systems face challenges in ensuring robust and reliable performance of control signal transmissions, particularly in multiple-input multiple-output (MIMO) technologies, due to errors or mis-detection of control signals which can impact data transmission scheduling and system performance.
The proposed solution involves using multiple transmission layers for control signal transmissions, allowing for more time-frequency resources to be utilized. This includes determining information for two or more transmission layers and transmitting control signals on one or more of these layers, either alone or multiplexed with data, to improve resource utilization and performance.
By employing multiple transmission layers, the method enhances the robustness, reliability, and capacity of control signal transmissions, leading to improved system performance and reduced errors in scheduling and feedback processes.
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Figure CN2023134966_10042025_PF_FP_ABST
Abstract
Description
COMMUNICATION METHOD AND COMMUNICATION APPARATUS
[0001] This application claims priority to United States Patent Application No. 63 / 588,516, filed with the United States Patent and Trademark Office on October 6, 2023, and entitled “UPLINK CONTROL INFORMATION (UCI) TRANSMISSION FOR TERABIT MULTIPLE IN AND MULTIPLE OUT (T-MIMO) ” , which is incorporated herein by reference in its entirety.TECHNICAL FIELD
[0002] Embodiments of the present application relate to the field of communications, and more specifically, to a communication method and a communication apparatus. For example, the communication method and the communication apparatus could be used for an uplink transmission or a sidelink transmission.BACKGROUND
[0003] A control signal transmission (such as uplink control signal transmission, or sidelink control signal transmission) takes the role of scheduling a data transmission or feedback of a data transmission as well as other information such as channel measurements, service requests, etc. Any error or mis-detection of the control signal would lead to the mis-detection or mis-decoding of the data transmission. Errors in feedback would also lead to the wrong behavior, which may impact system performance. Therefore, more efforts are required for the control signal transmission to guarantee robust / reliable performance.SUMMARY
[0004] Embodiments of the present application provide a communication method and a communication apparatus. The technical solutions may improve robust and reliable performance of a control signal.
[0005] According to a first aspect, an embodiment of the present application provides a communication method, and the method may be performed by a communication device (for example, a user equipment (UE) ) , or be performed by a chip, a circuit, or a processing system configured in the communication device. The method includes: determining information of two or more transmission layers for a control signal transmission; and transmitting a control signal on one or more transmission layers out of the two or more transmission layers.
[0006] According to the above technical solution, multiple transmission layers (that is, two or more transmission layers) may be used to transmit the control signal, that is, one or more transmission layers are added on top of a single transmission layer of a time-frequency resource for the control signal transmission. Namely, more time-frequency resources may be utilized to transmit and / or receive the control signal. That could improve performance (e.g., robust performance and reliable performance) and capacity of the control signal transmission.
[0007] In a possible design, the transmitting a control signal on one or more transmission layers out of the two or more transmission layers includes: transmitting the control signal without being multiplexed with data on the one or more transmission layers out of the two or more transmission layers.
[0008] According to the above technical solution, if there is no data to transmit, the control signal may be transmitted on the two or more transmission layers, this achieves the control signal transmission with multiple transmission layers.
[0009] In a possible design, the transmitting a control signal on one or more transmission layers out of the two or more transmission layers includes: transmitting the control signal with data on the one or more transmission layers out of the two or more transmission layers.
[0010] According to the above technical solution, if there is data to transmit, the control signal may be transmitted with the data on the one or more transmission layers, this achieves the control signal transmission with multiple transmission layers and improves resource utilization.
[0011] In a possible design, a transmission layer used for carrying the data is the same as a transmission layer used for carrying the control signal; or, a transmission layer used for carrying the data is different from a transmission layer used for carrying the control signal; or, one or more of transmission layers used for carrying the data are the same as a transmission layer used for carrying the control signal.
[0012] According to the above technical solution, while the control signal and the data are transmitted on the one or more transmission layers, the transmission layer used for carrying the data and the control signal may be designed flexibly.
[0013] In a possible design, a transmission layer with higher channel quality is used for carrying the control signal, and a transmission layer with lower channel quality is used for carrying the data.
[0014] According to the above technical solution, as the control signal is usually related to system performance, the control information may be transmitted on the transmission layer with higher channel quality, therefore resulting in lower error rate and lower latency in control information transmission.
[0015] In a possible design, the control signal includes a first type of control signal and a second type of control signal, and the two or more transmission layers include a first transmission layer and a second transmission layer; the transmitting a control signal on one or more transmission layers out of the two or more transmission layers includes: transmitting the first type of control signal on the first transmission layer, and transmitting the second type of control signal on the second transmission layer.
[0016] According to the above technical solution, different types of control signals may be transmitted on different transmission layers. Thus, a certain type of control signal may be transmitted on a certain transmission layer according to the communication channel condition.
[0017] In a possible design, a transmission layer with higher channel quality is used for carrying the first type of control signal, and a transmission layer with lower channel quality is used for carrying the second type of control signal; the first type of control signal includes a service request and / or acknowledgement of a hybrid automatic repeat request process, and the second type of control signal is channel state information; or, the first type of control signal is acknowledgement of a hybrid automatic repeat request process, and the second type of control signal is a service request.
[0018] According to the above technical solution, among different types of control signals, the service request and the acknowledgement of a hybrid automatic repeat request process are considered as more important control signal than the channel state information, the transmissions of the service request and the acknowledgement of a hybrid automatic repeat request process require more reliable / robust performance to avoid the latency and waste of resources in a system, and using the transmission layers with higher channel quality may be an appropriate and straightforward choice.
[0019] In a possible design, the control signal includes a first type of control signal and a second type of control signal, and the first type of control signal and the second type of control signal are transmitted on the same transmission layer.
[0020] In a possible design, the control signal is repeatedly transmitted on the one or more transmission layers out of the two or more transmission layers.
[0021] According to the above technical solution, transmission diversity is realized. There are multiple transmission layers, thus more time-frequency resources may be used to carrying the control signal, and the control signal may be repeated and transmitted on different transmission layers, which could improve control signal transmission performance.
[0022] In a possible design, one or more encoded bits of the control signal are repeatedly transmitted on the one or more transmission layers out of the two or more transmission layers, and / or, the same or different redundancy version of the control signal is transmitted on the one or more transmission layers out of the two or more transmission layers.
[0023] In a possible design, the determining information of the two or more transmission layers includes: receiving downlink control information or sidelink control information, and / or radio resource control signaling indicating the information of the two or more transmission layers.
[0024] In a possible design, the downlink control information or sidelink control information, and / or radio resource control signaling includes one or more of the following information: a time domain resource, a frequency domain resource, the two or more transmission layers for the control signal transmission, a transmission layer used for carrying the control signal, information indicating the control signal is repeatedly transmitted, a transmission layer used for the repeatedly transmitted control signal, a transmission occasion, a transmission layer used for carrying different types of control signals, a transmission layer used for carrying data, a way of multiplexing the control signal and the data, a demodulation reference signal port used for the two or more transmission layers, a modulation and coding scheme for the control signal, or a type of the control signal on the two or more transmission layers.
[0025] In a possible design, the control signal includes an uplink control signal or a sidelink control signal.
[0026] According to a second aspect, an embodiment of the present application provides a communication method, and the method may be performed by a communication device (for example, a base station) , or be performed by a chip, a circuit, or a processing system configured in the communication device. The method includes: determining information of two or more transmission layers for a control signal transmission; and receiving a control signal on one or more transmission layers out of the two or more transmission layers.
[0027] For example, the determining information of two or more transmission layers for a control signal transmission includes: configuring (or generating) the information of the two or more transmission layers for the control signal transmission.
[0028] In a possible design, the receiving a control signal on one or more transmission layers out of the two or more transmission layers, includes: receiving the control signal without being multiplexed with data on the one or more transmission layers out of the two or more transmission layers.
[0029] In a possible design, the receiving a control signal on one or more transmission layers out of the two or more transmission layers includes: receiving the control signal with data on the one or more transmission layers out of the two or more transmission layers.
[0030] In a possible design, a transmission layer used for carrying the data is the same as a transmission layer used for carrying the control signal; or, a transmission layer used for carrying the data is different from a transmission layer used for carrying the control signal; or, one or more of transmission layers used for carrying the data are the same as a transmission layer used for carrying the control signal.
[0031] In a possible design, a transmission layer with higher channel quality is used for carrying the control signal, and a transmission layer with lower channel quality is used for carrying the data.
[0032] In a possible design, the control signal includes a first type of control signal and a second type of control signal, and the two or more transmission layers include a first transmission layer and a second transmission layer; the receiving a control signal on one or more transmission layers out of the two or more transmission layers includes: receiving the first type of control signal on the first transmission layer, and receiving the second type of control signal on the second transmission layer.
[0033] In a possible design, a transmission layer with higher channel quality is used for carrying the first type of control signal, and a transmission layer with lower channel quality is used for carrying the second type of control signal; the first type of control signal includes service request and / or acknowledgement of a hybrid automatic repeat request process, and the second type of control signal is channel state information; or, the first type of control signal is acknowledgement of a hybrid automatic repeat request process, and the second type of control signal is service request.
[0034] In a possible design, the control signal includes a first type of control signal and a second type of control signal, and the first type of control signal and the second type of control signal are received on the same transmission layer.
[0035] In a possible design, the control signal is repeatedly received on the one or more transmission layers out of the two or more transmission layers.
[0036] In a possible design, one or more bits of the control signal are repeatedly received on the one or more transmission layers out of the two or more transmission layers, and / or, the same or different redundancy version of the control signal is received on the one or more transmission layers out of the two or more transmission layers.
[0037] In a possible design, the method further includes: transmitting downlink control information or sidelink control information, and / or radio resource control signaling indicating the information of the two or more transmission layers.
[0038] In a possible design, the downlink control information or sidelink control information, and / or radio resource control signaling includes one or more of the following information: a time domain resource, a frequency domain resource, the two or more transmission layers for the control signal transmission, a transmission layer used for carrying the control signal, information indicating the control signal is repeatedly transmitted, a transmission layer used for the repeatedly transmitted control signal, a transmission occasion, a transmission layer used for carrying different types of control signals, a transmission layer used for carrying data, a way of multiplexing the control signal and the data, a demodulation reference signal port used for the two or more transmission layers, a modulation and coding scheme for the control signal, or a type of the control signal on the two or more transmission layers.
[0039] In a possible design, the control signal includes an uplink control signal or a sidelink control signal.
[0040] Various implementations of the second aspect correspond to various implementations of the first aspect. For the various implementations and the beneficial technical effects of the various implementations of the second aspect, reference may be made to the descriptions of the relevant implementations of the first aspect, which will not be repeated here.
[0041] According to a third aspect, a communication apparatus is provided, and configured to perform the method in any possible implementation of the foregoing aspects. Specifically, the apparatus includes a unit configured to perform the method in any possible implementation of the foregoing aspects.
[0042] According to a fourth aspect, another communication apparatus is provided, including a processor. The processor is coupled to a memory, and may be configured to execute one or more instructions in the memory, to implement the method in any possible implementation of the various aspects. The memory may be an on-chip storage unit inside the processor, or may be an off-chip storage unit that is coupled to the memory and located outside the processor. In a possible implementation, the apparatus further includes the memory. In a possible implementation, the apparatus further includes a communication interface, and the processor is coupled to the communication interface.
[0043] In a possible design, the communication apparatus may be a UE, may be a chip, a circuit, or a processing system configured in the UE, or may be a device including the UE.
[0044] In a possible design, the communication apparatus may be a base station, may be a chip, a circuit, or a processing system configured in the base station s, or may be a device including the base station.
[0045] According to a fifth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program, and when the computer program is executed by a communication apparatus, the communication apparatus is enabled to implement the method in any possible implementation of the foregoing aspects.
[0046] According to a sixth aspect, a computer program product including one or more instructions is provided. When the instructions are executed by a computer, a communication apparatus is enabled to implement the method in any possible implementation of the foregoing aspects.
[0047] According to a seventh aspect, a computer program is provided. When the computer program is executed by a computer, a communication apparatus is enabled to implement the method in any possible implementation of the foregoing aspects.
[0048] According to an eighth aspect, a communication system is provided. The communication system includes a first communication apparatus and / or a second communication apparatus, the first communication apparatus is configured to perform the method in any possible implementation of the first aspect, and the second communication apparatus is configured to perform the method in any possible implementation of the second aspect.
[0049] According to a ninth aspect, an apparatus for implementing the method in any possible implementation of the foregoing aspects is provided.DESCRIPTION OF DRAWINGS
[0050] FIG. 1 is a schematic diagram of an application scenario according to this application;
[0051] FIG. 2 illustrates an example communication system 100;
[0052] FIG. 3 illustrates another example of an ED 110 and a base station 170a, 170b and / or 170c;
[0053] FIG. 4 is an example of a channel model of a MIMO system;
[0054] FIG. 5 is an example of a channel model of a multiple-input multiple-output (MIMO) system;
[0055] FIG. 6 is a schematic flowchart of a communication method 600 according to an embodiment of this application;
[0056] FIG. 7 is an example that different types of control signals are transmitted on different transmission layers of this application;
[0057] FIG. 8 is an example that different types of control signals are transmitted on same transmission layer of this application;
[0058] FIG. 9 is an example that a control signal is repeatedly transmitted on transmission layers of this application;
[0059] FIG. 10 is an example that a control signal and data are transmitted on different transmission layers of this application;
[0060] FIG. 11 is an example that a control signal and data are transmitted on same transmission layer of this application;
[0061] FIG. 12 is an example of Manner#1 and Manner#2 combined of this application;
[0062] FIG. 13 is another example of Manner#1 and Manner#2 combined of this application;
[0063] FIG. 14 is an example of a repeated control signal and data on different transmission layers of this application;
[0064] FIG. 15 is an example of a control signal transmission in SU-MIMO manner of this application;
[0065] FIG. 16 is an example of a control signal transmission and a data transmission in MU-MIMO manner of this application;
[0066] FIG. 17 is an example of a control signal transmission and a data transmission in combined SU-MIMO and MU-MIMO manner of this application;
[0067] FIG. 18 is a schematic block diagram of a communication apparatus according to an embodiment of this application;
[0068] FIG. 19 is a schematic block diagram of another communication apparatus according to an embodiment of this application.DESCRIPTION OF EMBODIMENTS
[0069] The following describes technical solutions of the present application with reference to the accompanying drawings.
[0070] The technical solutions in embodiments of this application may be applied to multiple-input multiple-output (MIMO) technology. And the technical solutions in embodiments of this application may be applied to various communication systems, such as a fifth generation (5G) wireless communication system, a new ratio (NR) wireless communication system, a Long Term Evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a wireless local area network (WLAN) , a satellite communication system, or other evolving communication systems, such as a sixth generation (6G) wireless communication system.
[0071] For ease of understanding of the embodiments of this application, a communication system shown in FIG. 1-FIG. 4 is used as an example to describe in detail a communication system to which the embodiments of this application are applicable.
[0072] Referring to FIG. 1, as an illustrative example without limitation, a simplified schematic illustration of a communication system is provided. The communication system 100 includes a radio access network 120. The radio access network 120 may be a next generation (e.g. sixth generation (6G) or later) radio access network, or a legacy (e.g. 5G, 4G, 3G or 2G) radio access network. One or more communication electronic devices (ED) 110a-110j (generically referred to as ED 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. Also, the communication system 100 includes a public switched telephone network (PSTN) 140, the Internet 150, and other networks 160.
[0073] Referring to FIG. 2, an example communication system 100 is illustrated. In general, the communication system 100 enables multiple wireless or wired elements to communicate data and other content. The purpose of the communication system 100 may be to provide content, such as voice, data, video, and / or text, via broadcast, multicast and unicast, etc. The communication system 100 may operate by sharing resources, such as carrier spectrum bandwidth, between its constituent elements. The communication system 100 may include a terrestrial communication system and / or a non-terrestrial communication system. 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, autonomous delivery and mobility, etc. ) . The communication system 100 may provide a high degree of availability and robustness through a joint operation of the terrestrial communication system and the non-terrestrial communication system. For example, integrating a non-terrestrial communication system (or components thereof) into a terrestrial communication system can result in what may be considered a heterogeneous network including multiple layers. Compared to conventional communication networks, 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.
[0074] The terrestrial communication system and the non-terrestrial communication system could be considered sub-systems of the communication system. In the example shown, the communication system 100 includes electronic devices (ED) 110a-110d (generically referred to as ED 110) , radio access networks (RANs) 120a-120b, non-terrestrial communication network 120c, a core network 130, a public switched telephone network (PSTN) 140, the Internet 150, and other networks 160. The RANs 120a-120b include respective base stations (BSs) 170a-170b, which may be generically referred to as terrestrial transmit and receive points (T-TRPs) 170a-170b. The non-terrestrial communication network 120c includes an access node 120c, which may be generically referred to as a non-terrestrial transmit and receive point (NT-TRP) 172.
[0075] Any ED 110 may be alternatively or additionally configured to interface, access, or communicate with any other T-TRP 170a-170b and NT-TRP 172, the 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 and / or downlink transmission over an interface 190a with T-TRP 170a. In some examples, the EDs 110a, 110b and 110d may also communicate directly with one another via one or more sidelink air interfaces 190b. In some examples, ED 110d may communicate an uplink and / or downlink transmission over an interface 190c with NT-TRP 172.
[0076] 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) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal FDMA (OFDMA) , or single-carrier FDMA (SC-FDMA) 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.
[0077] The air interface 190c can enable communication between the ED 110d and one or multiple 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 and one or multiple NT-TRPs for multicast transmission.
[0078] 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, the 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 the 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) , and 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.
[0079] Referring to FIG. 3, an example of an ED 110 and a base station 170a, 170b and / or 170c is illustrated. The ED 110 is used to connect persons, objects, machines, etc. The ED 110 may be widely used in various scenarios, for example, cellular communications, device-to-device (D2D) , vehicle to everything (V2X) , peer-to-peer (P2P) , machine-to-machine (M2M) , machine-type communications (MTC) , internet of things (IOT) , virtual reality (VR) , augmented reality (AR) , 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.
[0080] Each ED 110 represents any suitable end user device for wireless operation and may include such devices (or may be referred to) as a user equipment / device (UE) , a wireless transmit / receive unit (WTRU) , a mobile station, a fixed or mobile subscriber unit, a cellular telephone, a station (STA) , a machine type communication (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, an industrial device, or an apparatus (e.g. a communication module, a modem, or a chip) in the forgoing devices, among other possibilities. Future generation EDs 110 may be referred to as other terms. The base station 170a and 170b is a T-TRP and will hereafter be referred to as T-TRP 170. Also, as shown in FIG. 3, an NT-TRP will hereafter be referred to as NT-TRP 172. Each ED 110 connected to T-TRP 170 and / or NT-TRP 172 can 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 or more of: connection availability and connection necessity.
[0081] The ED 110 includes a transmitter 201 and a receiver 203 coupled to one or more antennas 204. Only one antenna 204 is illustrated. One, some, or all of the antennas 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.
[0082] The ED 110 includes at least one memory 208. The memory 208 stores instructions and data used, generated, or collected by the ED 110. For example, the memory 208 could 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 processing unit (s) 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, on-processor cache, and the like.
[0083] The ED 110 may further include one or more input / output devices (not shown) or interfaces (such as a wired interface to the Internet 150 in FIG. 1) . The input / output devices permit interaction with a user or other devices in the network. Each input / output device includes any suitable structure for providing information to or receiving information from a user, such as a speaker, microphone, keypad, keyboard, display, or touch screen, including network interface communications.
[0084] The ED 110 further includes a processor 210 for performing operations including those related to preparing a transmission for uplink transmission to the NT-TRP 172 and / or T-TRP 170, those related to processing downlink transmissions received from the NT-TRP 172 and / or T-TRP 170, and those related to processing sidelink transmissions 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. 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 reference signals transmitted by NT-TRP 172 and / or T-TRP 170. In some embodiments, the processor 276 implements the transmit beamforming and / or receive beamforming based on the indication of beam direction, e.g. beam angle information (BAI) , received from T-TRP 170. In some embodiments, the processor 210 may perform operations related to network access (e.g. initial access) and / or downlink synchronization, such as operations related to detecting a synchronization sequence, decoding and obtaining the system information, etc. In some embodiments, the processor 210 may perform channel estimation, e.g. using reference signals received from the NT-TRP 172 and / or T-TRP 170.
[0085] Although not illustrated, the processor 210 may form part of the transmitter 201 and / or receiver 203. Although not illustrated, the memory 208 may form part of the processor 210.
[0086] The processor 210, and the processing components of the transmitter 201 and 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 memory 208) . Alternatively, some or all of the processor 210, and the processing components of the transmitter 201 and the receiver 203 may be implemented using dedicated circuitry, such as a programmed field-programmable gate array (FPGA) , a graphical processing unit (GPU) , or an application-specific integrated circuit (ASIC) .
[0087] 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) , or a wireless router, a relay station, a remote radio head, a terrestrial node, a terrestrial network device, or a terrestrial base station, base band unit (BBU) , remote radio unit (RRU) , radio unit (RU) , active antenna unit (AAU) , remote radio head (RRH) , central unit (CU) , distribute unit (DU) , positioning node, among other possibilities. The T-TRP 170 may be macro BSs, pico BSs, relay node, donor node, or the like, or combinations thereof. The T-TRP 170 may refer to the foregoing devices or apparatus (e.g. a communication module, a modem, or a chip) in the foregoing devices.
[0088] The CU (or CU-control plane (CP) and CU-user plane (UP) ) , DU or RU may be known by other names in some implementations. For example, in an open RAN (ORAN) system, the CU may also be referred to as open CU (O-CU) , DU may also be referred to as open DU (O-DU) , CU-CP may also be referred to open CU-CP (O-CU-CP) , CU-UP may also be referred to as open CU-UP (O-CU-CP) , and RU may also be referred to open RU (O-RU) . Any one of the CU (or CU-CP, CU-UP) , DU, or RU could be implemented through a software module, a hardware module, or a combination of software and hardware modules.
[0089] 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 remotely from the equipment housing the antennas of the T-TRP 170, and may be coupled to the equipment housing the antennas over a communication link (not shown) sometimes known as front haul, such as a 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 housing the antennas 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 coordinated multipoint transmissions.
[0090] The T-TRP 170 includes at least one transmitter 252 and at least one receiver 254 coupled to one or more antennas 256. Only one antenna 256 is illustrated. One, some, or all of the antennas may alternatively be panels. The transmitter 252 and the receiver 254 may be integrated as a transceiver. The T-TRP 170 further includes a processor 260 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 NT-TRP 172, and processing a transmission received over backhaul from the 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, and demodulating and decoding received symbols. The processor 260 may also perform operations related to network access (e.g. initial access) and / or downlink synchronization, such as generating the content of synchronization signal blocks (SSBs) , generating the system information, etc. In some embodiments, the processor 260 also generates the 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, determining where to deploy NT-TRP 172, etc. 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. Note that “signaling” , as used herein, may alternatively be called control signaling. Dynamic signaling may be transmitted in a control channel, e.g. a physical downlink control channel (PDCCH) , and static or semi-static higher layer signaling may be included in a packet transmitted in a data channel, e.g. in a physical downlink shared channel (PDSCH) .
[0091] The scheduler 253 may be coupled to the processor 260. The scheduler 253 may be included within or operated separately from the T-TRP 170, which may schedule uplink, downlink, and / or backhaul transmissions, including issuing scheduling grants and / or configuring scheduling-free ( “configured grant” ) resources. The T-TRP 170 further includes a memory 258 for storing information and data. The memory 258 stores instructions and data used, generated, or collected by the T-TRP 170. For example, the memory 258 could store software instructions or modules configured to implement some or all of the functionality and / or embodiments described herein and executed by the processor 260.
[0092] Although not illustrated, the processor 260 may form part of the transmitter 252 and / or 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.
[0093] The processor 260, the scheduler 253, and the processing components of the transmitter 252 and 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 memory 258. Alternatively, some or all of the processor 260, the scheduler 253, and the processing components of the transmitter 252 and the receiver 254 may be implemented using dedicated circuitry, such as an FPGA, a GPU, or an ASIC.
[0094] 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. 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. The NT-TRP 172 includes a transmitter 272 and a receiver 274 coupled to one or more antennas 280. Only one antenna 280 is illustrated. 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 further includes 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 processing a transmission received over backhaul from the T-TRP 170. 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, and demodulating 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 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.
[0095] The NT-TRP 172 further includes a memory 278 for storing information and data. Although not illustrated, the processor 276 may form part of the transmitter 272 and / or receiver 274. Although not illustrated, the memory 278 may form part of the processor 276.
[0096] The processor 276 and the processing components of the transmitter 272 and 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 memory 278. Alternatively, some or all of the processor 276 and the processing components of the transmitter 272 and the receiver 274 may be implemented using dedicated circuitry, such as a programmed FPGA, a GPU, 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.
[0097] 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.
[0098] One or more steps of the embodiment methods provided herein may be performed by corresponding units or modules, according to FIG. 4.
[0099] Referring to FIG. 4, as an illustrative example of units or modules in a device, 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 a transmitting module. For example, a signal may be transmitted by a transmitting unit or a transmitting module. A signal may be received by a receiving unit or 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 instance, one or more of the units or modules may be an integrated circuit, such as a programmed FPGA, a GPU, or an ASIC. It will be appreciated that where the modules are implemented using software for execution by a processor for example, they 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.
[0100] Additional details regarding the EDs 110, T-TRP 170, and NT-TRP 172 are known to those of skill in the art. As such, these details are omitted here.
[0101] For ease of understanding of the embodiments of this application, the following briefly describes MIMO.
[0102] MIMO technology allows an antenna array of multiple antennas to perform signal transmissions and receptions to meet high transmission rate requirements. The above ED110 and T-TRP 170, and / or NT-TRP use MIMO to communicate over wireless resource blocks. MIMO utilizes multiple antennas at the transmitting apparatus and / or receiving apparatus to transmit the wireless resource blocks over parallel wireless signals. MIMO may beamform parallel wireless signals for reliable multipath transmission of a wireless resource block. MIMO may bond parallel wireless signals that transport different data to increase the data rate of the wireless resource block.
[0103] In recent years, a MIMO (or a large-scale MIMO) wireless communication system with the above T-TRP 170, and / or NT-TRP 172 configured with a large number of antennas has gained wide attention from the academia and the industry. In the large-scale MIMO system, the T-TRP 170 and / or NT-TRP 172 is generally configured with more than ten antenna units (such as 128 or 256) , and serves for dozens of the EDs 110. A large number of antenna units of the T-TRP 170, and NT-TRP 172 can greatly increase the degree of spatial freedom of wireless communication, greatly improve the transmission rate, spectrum efficiency and power efficiency, and eliminate the interference between cells to a large extent. The increase in the number of antennas allows each antenna unit to be made smaller and at a lower cost. Using the degree of spatial freedom provided by the large-scale antenna units, the T-TRP 170 and NT-TRP 172 of each cell can communicate with many EDs 110 in the cell on the same time-frequency resource at the same time, thus greatly increasing the spectrum efficiency. A large number of antenna units of the T-TRP 170 and / or NT-TRP 172 also enable each user to have better spatial directivity for uplink and downlink transmission, so that the transmitting power of the T-TRP 170 and / or NT-TRP 172 and an ED 110 is reduced, and the power efficiency is greatly increased. When the number of antennas of the T-TRP 170 and / or NT-TRP 172 is sufficiently large, random channels between each ED 110 and the T-TRP 170 and / or NT-TRP 172 can be close to be orthogonal, and the interference between the cell and the users and the effect of noises can be eliminated. The plurality of advantages described above enable the large-scale MIMO to have a magnificent application prospect.
[0104] A MIMO system may include a receiving apparatus connected to a receive (Rx) antenna, a transmitting apparatus connected to a transmit (Tx) antenna, and a signal processor connected to the transmitting apparatus and the receiving apparatus. Each of the Rx antenna and the Tx antenna may include a plurality of antennas. For instance, the Rx antenna may have a ULA antenna array in which the plurality of antennas is arranged in a line at even intervals. When a radio frequency (RF) signal is transmitted through the Tx antenna, the Rx antenna may receive a signal reflected and returned from a forward target. The receiving apparatus could be an ED (i.e. ED110) and the transmitting apparatus could be a T-TRP or NT-TRP (i.e. T-TRP 170 or NT-TRP 172) , or the receiving apparatus could be a T-TRP or NT-TRP (i.e. T-TRP 170 or NT-TRP 172) and the transmitting apparatus could be an ED (i.e. ED110) .
[0105] Referring to FIG. 5, as an illustrative example without limitation, a simplified schematic illustration of a communication scenario is provided. A transmitting apparatus is connected to four Tx antennas, x1 to x4, a receiving apparatus is connected to four Rx antennas, y1 to y4, and a transmission channel may be formed between each Tx antenna and each Rx antenna. For example, an RF signal transmitted through x1 may be received by y2 through channel h21. The RF signal transmitted through x3 may be received by y1 through channel h13.
[0106] Hereafter, a base station is used as an example of T-TRP 170 or NT-TRP 172, and the UE is used as an example of ED 110. However, limitation is not made herein.
[0107] A 400 MHz system bandwidth in the 10~13GHz range is envisioned as a promising mid-band for wide-area coverage and capacity improvement in 6G systems. In 10~13GHz with 400MHz, it is possible to deploy a ~1000 transmit / receive (Tx / Rx) antenna array at a base station side and a ~30 Tx / Rx antenna array at a UE side, which is far larger than the 5G antenna array scale. The MIMO is a technology for 10~13GHz to improve single user-MIMO (SU-MIMO) peak rate with ~20 layers transmission and network peak throughput with ~300 layers multiple-user MIMO (MU-MIMO) layer transmission, and could reach a Tera-bits level system throughput, thus it could also be referred to as Tera-bits MIMO (T-MIMO) . Such super large scale of antennas at both the base station and UE side would result in rich multi-transmission layers. These multi-transmission layers would not only improve the performance of a data transmission but also be used to improve a control signal transmission in both the downlink and uplink directions between the base station and the UE. These multi-transmission layers could also be used in other links such as sidelink between a UE and another UE wherever applicable.
[0108] The control signal transmission takes a role of scheduling a data transmission or feedback the outcome of the data transmission as well other information such as channel measurements, service request etc. On the one hand, any error or miss-detection of the control signal would lead to mis-detection or miss-decoding of the data transmission it schedules. Error in feedback would also lead to a wrong behavior at a transmitter (e.g., base station, or UE) side which could impact a receiver (e.g., UE, or base station) and system performance. Therefore, low error rate is tolerable for a control signal transmission, much lower than that of the data transmission. For data channel, a hybrid automatic repeat request (HARQ) process is implemented to allow re-transmission and hybrid combining of original and re-transmission of the same data to counterattack the channel impairment and improve the robustness of the system performance. However, for control channel, there is no such mechanism in place to improve its performance. The other challenge for the control signal (or control channel) transmission is that the receiver does not know exactly when and where the control signal would be transmitted, thus, the receiver could only rely on searching for and blind decoding of the control signal, resulting in more complexity in detecting and decoding it. Therefore, more time-frequency resources and efforts are required for a control signal transmission to guarantee it has robust / reliable performance. On the other hand, the capacity of the control signal is related to overall capacity of a system as more capacity of the control signal is, the more data transmission could be scheduled and more feedback information could be conveyed, which will lead to improved overall system capacity. In summary, the reliability / robustness / capacity of the control signal is direct impact the whole system performance.
[0109] In prior arts, the control signal in physical (PHY) layer is transmitted on single transmission layer (or single spatial layer, or layer) over a time-frequency resources set (or blocks) in both downlink and uplink, and the time-frequency resource set could normally be shared by a number of UEs to balance performance and overhead. That could limit capacity and reliability of control signal transmission. For example, acknowledgement of a hybrid automatic repeat request process (HARQ-ACK) / service request (SR) indication could be carried by a number of orthogonal or pseudo-orthogonal sequences multiplexed on the same set of OFDM symbols. As number of such sequences that can be carried on the same symbol is limited, the capacity of UCI carried by the same time-frequency resource would be limited. To improve the performance, one option is to allocate more time-frequency resources for control signal transmission. However, this increase overhead and would impact the system performance.
[0110] In view of this, the embodiments of this application provide solutions that multiple transmission layers could be used for a UCI transmission. When the multiple transmission layers are used to transmit control signals (e.g., PUCCH, or sidelink control signal) , that adds one or more transmission layers on top of a single transmission layer of a time-frequency resource for a control signal transmission. Namely, more time-frequency resources could be utilized to transmit / receive the control signals. That could greatly improve the performance and capacity of the UCI transmission as compared with a single layer UCI transmission.
[0111] Specifically, in some scenarios (e.g., T-MIMO scenario) , as larger number of antennas will be used in both base station and UE side, more transmission layers with good channel quality could be available, that opens a new dimension (spatial) to improve system performance. A control signal transmission could also benefit from availability of multiple transmission layers. If the multiple transmission layers are used for the control signal transmission in uplink (e.g., UCI) between the base station and UE or in sidelink (SL) between two UEs, it will provide more time-frequency resources for the control signal as compared with single transmission layer. That would not only increase the reliability / robustness of the control signal transmission (e.g., by allocating more time-frequency resources and using lower coding rate) , but also increase the capacity of the control signal (more time-frequency resources could accommodate more UEs for control signals and with larger payloads) .
[0112] The following describes the embodiments of this application in detail with reference to the accompanying drawings.
[0113] In the embodiments of this application, a transmission layer may be referred to as a spatial layer that is used to carry information (control information or data) for transmission, or may be referred to as a layer for the same purpose. Information carried on a transmission layer could be mapped to a corresponding antenna port before being transmitted. Multiple transmission layers would allow multiple independent information streams (one stream on one layer) transmitted in the air simultaneously from a transmitter (e.g., a UE) to a receiver (e.g., a base station, or a UE) , and thus improve the throughput or reliability. However, limitation is not made herein. The transmission layer is only named for description and do not limit the scope of protection of the embodiments of this application.
[0114] In the embodiments of this application, a time-frequency resource may be referred to as any one of: a resource, a time-frequency domain resource, a time-frequency resource set, or a time-frequency resource block.
[0115] In the embodiments of this application, “and / or” describes an association relationship between associated objects and represents that three relationships may exist. For example, A and / or B may represent the following three cases: only A exists, both A and B exist, and only B exists. The character “ / ” generally indicates an “or” relationship between the associated objects. “At least one” means one or more. “At least one of A and B” , similar to “A and / or B” , describes an association relationship between associated objects and represents that three relationships may exist. For example, at least one of A and B may represent the following three cases: only A exists, both A and B exist, and only B exists.
[0116] Referring to FIG. 6, FIG. 6 is a schematic flowchart of a communication method 1000 according to an embodiment of this application. The communication method 600 may be performed by a communication device (for example, a base station or a UE) , or be performed by a chip, a circuit, or a processing system configured in the communication device. The following embodiments are described in combination with the communication method 600 is performed by the UE as an example.
[0117] At S610, a UE determines information of two or more transmission layers for a control signal transmission.
[0118] As an example, the two or more transmission layers are all layers involved in a schedule, or parts of all the layers involved in a schedule.
[0119] As an example, a control signal is a signal that could be used for scheduling a data transmission or feedback of a data transmission as well other information such as channel measurements, service request etc. The control signal could be a signal in uplink direction between the UE and a base station, for example, the control signal is an uplink control signal (e.g., UCI or PUCCH) , or the control signal could be a signal in sidelink direction between the UE and another UE, for example, the control signal is a sidelink control signal.
[0120] In some embodiments, at S610, the UE determines the information by receiving downlink control information (DCI) or sidelink control information (SCI) , and / or radio resource control (RRC) signaling indicating the information of the two or more transmission layers. The following is described in combination with two cases.
[0121] Case 1, the control signal is the uplink control signal. In this case, the control signal transmission is an uplink control signal transmission (e.g., a PUCCH transmission) transmitted by the UE, in other words, the two or more transmission layers are used for the uplink control signal transmission (e.g., PUCCH transmission) .
[0122] For an example, the UE receives the DCI, and the DCI indicates the information of the two or more transmission layers for the uplink control signal transmission. Correspondingly, a base station transmits the DCI. Further, for an example, the base station configures (or generates) the information of the two or more transmission layers for the control signal transmission, and the base station transmits the DCI to indicate the information.
[0123] For another example, the UE receives the DCI and the RRC signaling, the DCI indicates part of the information of the two or more transmission layers for the uplink control signal transmission, and the RRC signaling indicates the rest of the information. Correspondingly, the base station transmits the DCI and the RRC signaling.
[0124] For another example, the UE receives the RRC signaling, and the RRC signaling indicates the information of the two or more transmission layers for the uplink control signal transmission. Correspondingly, the base station transmits the RRC signaling.
[0125] Case 2, the control signal is the sidelink control signal. In this case, the control signal transmission is a sidelink control signal transmission (e.g., a physical sidelink feedback channel (PSFCH) transmission) transmitted by the UE, in other words, the information of the two or more transmission layers are used for the sidelink control signal transmission.
[0126] For an example, the UE receives the SCI, and the SCI indicates the information of the two or more transmission layers for the sidelink control signal transmission. Correspondingly, another UE transmits the SCI.
[0127] For another example, the UE receives the SCI and the RRC signaling, the SCI indicates part of the information of the two or more transmission layers for the sidelink control signal transmission, and the RRC signaling indicates the rest of the information. Correspondingly, another UE transmits the SCI and the RRC signaling.
[0128] For another example, the UE receives the RRC signaling, and the RRC signaling indicates the information of the two or more transmission layers for the sidelink control signal transmission. Correspondingly, another UE transmits the RRC signaling.
[0129] In some embodiments, the DCI or SCI, and / or RRC signaling includes one or more of the following information: a time domain resource, a frequency domain resource, the two or more transmission layers for the control signal transmission, a transmission layer used for carrying the control signal, information indicating the control signal is repeatedly transmitted, a transmission layer used for the repeatedly transmitted control signal, a transmission occasion, a transmission layer used for carrying different types of control signals, a transmission layer used for carrying data, a way of multiplexing the control signal and the data, a demodulation reference signal (DMRS) port used for the two or more transmission layers, a modulation and coding scheme (MCS) for the control signal, or a type of the control signal on the two or more transmission layers. These information will be explained in detail with different embodiments or examples.
[0130] At S620, the UE transmits a control signal on one or more transmission layers out of the two or more transmission layers.
[0131] If the control signal is the uplink control signal, correspondingly, the base station receives the uplink control signal on the one or more transmission layers. If the control signal is the sidelink control signal, correspondingly, another UE receives the sidelink control signal on the one or more transmission layers.
[0132] The following describes two ways that a control signal is transmitted on one or more transmission layers.
[0133] Manner#A: only a control signal transmission on one or more transmission layers.
[0134] Manner#B: a control signal transmission piggyback on a data transmission on one or more transmission layers.
[0135] Manner#A and Manner#B are described in detail below.
[0136] Manner#A: only a control signal transmission on one or more transmission layers.
[0137] According to Manner#A, at S620, the UE transmits the control signal without being multiplexed with data on the one or more transmission layers. For example, specifically, in uplink, if the UE only has the control signal (e.g., UCI or PUCCH) to feedback but has no data to transmit to the base station, it is called the control signal (e.g., UCI or PUCCH) only transmission on multiple transmission layers.
[0138] Different types of control signal are transmitted on different transmission layers or on the same transmission layer. Two implementations are described below.
[0139] In a possible implementation, the control signal includes a first type of control signal and a second type of control signal, and the two or more transmission layers include a first transmission layer and a second transmission layer, at S620, the UE transmits the first type of control signal on the first transmission layer, and transmits the second type of control signal on the second transmission layer. The first type of control signal is different from the second type of control signal, and the first transmission layer is different from the second transmission layer. According to this implementation, different types of control signals are transmitted on different transmission layers.
[0140] Further, a transmission layer with higher channel quality is used for carrying the first type of control signal, and a transmission layer with lower channel quality is used for carrying the second type of control signal. As an example, the channel quality (or called channel condition) could be reflected (or indicated) by one or more of a signal-to-noise ratio (SNR) , a channel quality indicator (CQI) , or a signal-to-interference ratio (SINR) .
[0141] For an example, the first type of control signal includes a service request (SR) and / or acknowledgement of a hybrid automatic repeat request process (HARQ-ACK) , and the second type of control signal is channel state information (CSI) . For another example, the first type of control signal is acknowledgement of a hybrid automatic repeat request process, and the second type of control signal is a service request.
[0142] Specifically, assuming that the control signal includes: SR, HARQ-ACK, and CSI, among different types of control signals, the SR and the HARQ-ACK are considered as more important control signals than the CSI. As for the CSI, the CSI normally has large amount of information to feedback and may be feedback in a more periodic manner. As for the HARQ-ACK, the HARQ-ACK is to feedback the success or failure of a downlink data transmission and whether a re-transmission is needed or not. As for the SR, the SR is from a UE to inform a base station that it has uplink data to be transmitted to the base station, and thus the base station may proceed with scheduling such uplink transmission. As for the CSI, the error rate or loss requirement of the CSI may not be as high as the other two types of the control signal (that is the HARQ-ACK and the SR) . Therefore, the transmissions of the SR and the HARQ-ACK require more reliable / robust performance to avoid the latency and waste of resources in a system, and using the transmission layers with higher channel quality may be an appropriate and straightforward choice.
[0143] Referring to FIG. 7, FIG. 7 is an example that different types of control signals are transmitted on different transmission layers of this application. As shown in FIG. 7, two transmission layers respectively called layer#0 and layer#1 are used for the control signal transmission. As an example, assuming transmission layers are numbered in ascending order from higher channel quality to lower channel quality. As shown in FIG. 7, channel quality of the layer#0 is higher than channel quality of the layer#1, so HARQ-ACK / SR is transmitted on the layer#0, and CSI is transmitted on the layer#1.
[0144] In another possible implementation, the first type of control signal and the second type of control signal are transmitted on the same transmission layer. This application does not limit the number of a transmission layer used to transmit the first type of control signal and the second type of control signal, in other words, the first type of control signal and the second type of control signal are transmitted on one or more identical transmission layers. According to this implementation, different types of control signals are transmitted on the same transmission layer.
[0145] For example, CSI may be transmitted on transmission layers with higher channel quality if there is no HARQ-ACK or SR needs to be feedback, or after carrying the HARQ-ACK or the SR, there are still time-frequency resources available on those transmission layers that may be used to carry the CSI. Thus, the CSI may also be transmitted on transmission layers with higher channel quality, therefore resulting in lower error rate and lower latency in CSI transmission.
[0146] Referring to FIG. 8, FIG. 8 is an example that different types of control signals are transmitted on same transmission layer of this application. As shown in FIG. 8, two transmission layers respectively called layer#0 and layer#1 are used for the control signal transmission. As an example, assuming transmission layers are numbered in ascending order from higher channel quality to lower channel quality. As shown in FIG. 8, channel quality of the layer#0 is higher than channel quality of the layer#1, HARQ-ACK / SR is transmitted on the layer#0, and CSI is transmitted on the layer#1. As shown in FIG. 8, there are still time-frequency resources available after carrying the HARQ-ACK / SR, so the CSI may also be transmitted on the layer#0.
[0147] In some embodiments, the control signal is repeatedly transmitted on the one or more transmission layers. For example, the same control signal is repeatedly transmitted on the one or more transmission layers. According to this embodiment, a control signal may be repeatedly transmitted on transmission layers, in other words, the control signal (or called the same control signal) may be repeated and transmitted on different transmission layers. For example, the sequences (e.g., pseudo-noise (PN) sequences) that are used to carry the control signal (such as HARQ-ACK / SR) may be repeatedly transmitted on different symbols on different transmission layers. Such control signal may be in the form of one or more PN sequences or computer-generated sequences (e.g., a sequence may be used to represent the HARQ-ACK / SR) , or they may be in the form of a channel encoder output (an encoder input is a string of bits for HARQ-ACK / SR / CSI) or its redundancy version (RV) . Such sequences or encoder output (or its RV) may be placed and transmitted on different layers.
[0148] In a possible implementation, one or more encoded bits of the control signal are repeatedly transmitted on the one or more transmission layers. For example, if the control signal is encoded by polar codes, the one or more encoded bits may be repeated on different transmission layers, thus improving reliability of the control signal. And the same or different redundancy version of the control signal may be transmitted on the one or more transmission layers.
[0149] Referring to FIG. 9, FIG. 9 is an example that a control signal repeatedly transmitted on transmission layers of this application. As shown in FIG. 9, two transmission layers respectively called layer#0 and layer#1 are used for the control signal transmission. The same control signal may be repeated and transmitted on different transmission layers. As shown in FIG. 9, the control signal and its repeated version (for example, called repeated control signal) are transmitted on the layer#0 and the layer#1 respectively, specifically, a sequence (e.g., a PN sequence) that is used to carry the control signal could be transmitted on the layer#0 and the layer#1 respectively. And if the control signal is encoded by polar codes, the one or more encoded bits (e.g., called encoded blocks) could be repeated on different transmission layers, for example, the one or more encoded bits is repeated on the layer#0 and the layer#1.
[0150] That the UE transmits the control signal without being multiplexed with data on the one or more transmission layers may be initiated by itself or dynamically triggered / scheduled by a base station. Two implementations are described below.
[0151] In a possible implementation, that the UE transmits the control signal without being multiplexed with data on the one or more transmission layers is initiated by itself, in other words, that the UE transmits the control signal without being multiplexed with data on the one or more transmission layers may be semi-statically configured. In this implementation, higher layer signaling such as RRC signaling may be used to configure such transmission. For example, the UE receives the RRC signaling, and the RRC signaling indicates the information of the two or more transmission layers for the control signal transmission.
[0152] Due to varying control signal payloads or even the absence of a certain type of control signal at each transmission occasion, some configured transmission layers may not be fully or partially used by the UE. On such occasions, another UE or the base station may conduct blind decoding to detect actual control signal transmission by the UE. For example, the base station may conduct blind detection of DMRS ports and UCI payloads on each transmission layer, and the base station may determine if UCI is actually transmitted or not at a particular transmission layer, or a particular type of UCI is transmitted or not.
[0153] In some embodiments, the RRC signaling includes one or more of the following information: a time domain resource, a frequency domain resource, the two or more transmission layers for the control signal transmission, a transmission occasion, a transmission layer used for carrying different types of control signals, information indicating the control signal is repeatedly transmitted, a DMRS port used for the two or more transmission layers, an MCS for the control signal, or a mapping manner for the control signal. These information is described in detail below.
[0154] 1) Time domain resource
[0155] Time dimension may be represented by a time domain unit, which may include but is not limited to a symbol, an OFDM symbol, a slot and a transmission time interval (TTI) . The time domain resources include one or more time domain units.
[0156] 2) Frequency domain resource
[0157] Frequency dimension may be represented by a frequency domain unit, which may include but is not limited to a subcarrier, a subband, a resource block (RB) , a resource block group (RBG) , etc. The frequency domain resources include one or more frequency domain units.
[0158] 3) Information of the two or more transmission layers
[0159] In a possible implementation, the information of the two or more transmission layers includes one or more of an index of the two or more transmission layers, or the number of the two or more transmission layers.
[0160] 4) A transmission occasion
[0161] The control signal transmission may be periodic or aperiodic.
[0162] If the control signal transmission is periodic, information of the transmission occasion may be a period of the transmission occasions and an offset slot (or symbols) .
[0163] If the control signal transmission is aperiodic, information of the transmission occasion may be an offset slot (or symbols) and the number of aperiodic slots (or symbols) .
[0164] 5) A transmission layer used for carrying different types of control signals
[0165] For example, the transmission layer used for carrying different types of control signals includes one or more of the following: a transmission layer used for carrying an HARQ-ACK (e.g., an index of the transmission layer used for carrying the HARQ-ACK) , a transmission layer used for carrying an SR (e.g., an index of the transmission layer used for carrying the SR) , a transmission layer used for carrying a CSI (e.g., an index of the transmission layer used for carrying the CSI) , or a transmission layer used for carrying mixed types of control signals (e.g., an index of the transmission layer used for carrying the mixed types of control signals) .
[0166] A way to multiplex different types of control signals may be one or more of: time division multiplexing (TDM) , frequency division multiplexing (FDM) , or coded division multiplexing (CDM) . For example, the different types of control signals may be multiplexed on different OFDM symbols (TDM) , or in different PRBs (FDM) or using different sequences (CDM) or a combined manner of them. The way to multiplex different types of control signals may be pre-defined or carried on the RRC signaling.
[0167] It may also be configured as a way of placement of the different types of control signals, for example, which type of control signal is placed close to DMRS symbols and which type of control signal is placed further to DMRS symbols. The way of placement of the different types of control signals may be pre-defined or carried on the RRC signaling.
[0168] 6) Information indicating the control signal is repeatedly transmitted
[0169] This information is to configure that the control signal is repeatedly transmitted on different transmission layers. For example, the RRC signaling may include a bit field, if the bit field is configured with ‘0’ , it indicates the control signal is repeatedly transmitted; and if the bit field is configured with ‘1’ , it indicates the control signal is not repeatedly transmitted.
[0170] Further, if the control signal is repeatedly transmitted, as an example, the RRC signaling may include information of one or more transmission layers used for repeatedly transmitting the control signal (e.g., an index of the transmission layer used for repeatedly transmitting the control signal) . Or, the one or more transmission layers used for repeatedly transmitting the control signal may be pre-defined, for example, the two or more transmission layers are used for repeatedly transmitting the control signal.
[0171] Further, if the control signal is repeatedly transmitted, as an example, a way for repeatedly transmitting the control signal may also be configured, such as a redundancy version of the control signal, or applying cyclic precoding on the same control signal at each transmission layer. The way for repeatedly transmitting the control signal could be pre-defined or carried on the RRC signaling.
[0172] 7) A DMRS port used for the two or more transmission layers
[0173] This information is to configure the DMRS port used for each of the two or more transmission layers. For example, the information of the DMRS port includes one or more of a DMRS port number, DMRS patterns, or DMRS sequences.
[0174] 8) An MCS for the control signal
[0175] This information is to configure MCS used for each of the two or more transmission layers.
[0176] For an example, if CQI on each transmission layer is different, the information of the MCS includes more MCSs used for each of the two or more transmission layers.
[0177] For another example, if CQI on each transmission layer is close to each other, the information of the MCS includes one MCS used for the two or more transmission layers. Alternatively, this may be one MCS plus a set of MCS offsets to indicate the MCS for different transmission layers.
[0178] 9) A mapping manner for the control signal
[0179] This information is to configure if it uses the time-first or frequency first manner to map the control signal onto time-frequency resources.
[0180] In another possible implementation, that the UE transmits the control signal without being multiplexed with data on the one or more transmission layers may be dynamically triggered / scheduled by other devices (e.g., a base station, or another UE) . In this implementation, DCI or SCI may be used to configure such transmission. For example, the UE receives the DCI, and the DCI indicates the information of the two or more transmission layers for the control signal transmission.
[0181] Taking DCI as an example, the DCI triggering the control signal (e.g., UCI or PUCCH) without being multiplexed with data on the one or more transmission layers enables the base station to provide more dynamic scheduling of the control signal transmission adapting to channel conditions and system needs. The indications carried by the DCI may inform the UE that the information of the two or more transmission layers for the control signal transmission and this information may be in effect for a duration until the next DCI containing similar indications is received by the UE. Alternatively, the DCI may trigger one or more shots of aperiodic UCI transmission (sporadic transmissions) .
[0182] In some embodiments, the DCI includes one or more of the following information: the time domain resource, the frequency domain resource, the two or more transmission layers for the control signal transmission, the transmission occasion, the transmission layer used for carrying different types of control signals, the information indicating the control signal is repeatedly transmitted, the DMRS port used for the two or more transmission layers, or the MCS for the control signal. This information may refer to the relevant part of the application above, and for brevity, details are not described herein again.
[0183] The above two implementations may be used together to achieve the control signal without being multiplexed with data on the one or more transmission layers. For example, some information may be semi-statically configured and some information may be dynamically indicated, thus reducing the DCI / SCI overhead.
[0184] To facilitate Manner#A, different control signal transmission modes may be specified depending on types of control signals being transmitted. A control signal transmission mode may be designed based on a type of a control signal. For example, the control signal transmission mode includes one or more of: a control signal transmission mode for HARQ-ACK, a control signal transmission mode for SR, a control signal transmission mode for CSI, a control signal transmission mode for HARQ-ACK and SR, a control signal transmission mode for HARQ-ACK and CSI, a control signal transmission mode for CSI and SR, or a control signal transmission mode for HARQ-ACK, CSI and SR. The control signal transmission mode for HARQ-ACK indicates transmission of the HARQ-ACK only. The control signal transmission mode for SR indicates transmission of the SR only. The control signal transmission mode for CSI indicates transmission of the CSI only. The control signal transmission mode for HARQ-ACK and SR indicates transmission of the HARQ-ACK and the SR together. The control signal transmission mode for HARQ-ACK and CSI indicates transmission of the HARQ-ACK and the CSI together. The control signal transmission mode for CSI and SR indicates transmission of the CSI and the SR together.
[0185] Further, the control signal transmission on multiple transmission layers may be specified / configured for different control signal transmission modes. The configuration for each control signal transmission mode may include one or more of the following: the time domain resource, the frequency domain resource, the two or more transmission layers for the control signal transmission, the transmission occasion, the information indicating the control signal is repeatedly transmitted, the DMRS port used for the two or more transmission layers, the MCS for the control signal, or the mapping manner for the control signal. These information may refer to the relevant part of the application above, and for brevity, details are not described herein again.
[0186] Followed by the description of Manner#Aabove, Manner#B is described in detail below.
[0187] Manner#B: a control signal transmission piggyback on a data transmission on one or more transmission layers.
[0188] According to Manner#B, at S620, the UE transmits the control signal with data on the one or more transmission layers, in other words, in one transmission occasion, the UE transmits the control signal with the data on the one or more transmission layers. For example, specifically, in uplink, when there is data (PUSCH) scheduled in the uplink, the control signal can be piggybacked on the PUSCH. The data may or may not be related to the control signal. For an example, the data may be scheduled by a control signal on one or more out of the two or more transmission layers. For another example, the data may be scheduled by other control signal (s) .
[0189] There are many ways to transmit the control signal with the data on the one or more transmission layers.
[0190] Manner#1, a transmission layer used for carrying the data is different from a transmission layer used for carrying the control signal. According to this manner, the control signal and the data are transmitted on different transmission layers. For example, specifically, in uplink, one or more transmission layers may be allocated / scheduled / configured to carry the control signal in PUSCH.
[0191] Referring to FIG. 10, FIG. 10 is an example of the control signal and the data are transmitted on different transmission layers of this application.
[0192] As shown in FIG. 10, taking uplink as an example, UCI and data are transmitted on different transmission layers, specifically, the UCI is transmitted on layer#0, and the data is transmitted on layer#1.
[0193] In a possible implementation, a transmission layer with higher channel quality is used for carrying the control signal, and a transmission layer with lower channel quality is used for carrying the data. As an example, assuming transmission layers are numbered in ascending order from higher channel quality to lower channel quality, as shown in FIG. 10, the channel quality of the layer#0 is higher than the channel quality of the layer#1, so the UCI is transmitted on layer#0, and the data is transmitted on layer#1.
[0194] Manner#2, the transmission layer used for carrying the data is the same as the transmission layer used for carrying the control signal. According to this manner, the control signal and the data may be multiplexed on the same transmission layer. As an example, the control signal and the data are multiplexed in one of TDM / FDM / CDM manner or combined of them.
[0195] Referring to FIG. 11, FIG. 11 is an example that a control signal and data are transmitted on the same transmission layer of this application. As shown in FIG. 11, taking uplink as an example, UCI and data are multiplexed in TDM manner, specifically, the UCI and the data are transmitted on both layer#0 and layer#1.
[0196] Further, as shown in FIG. 11, as an example, the UCI is transmitted close to DMRS symbols, therefore resulting in lower error rate and lower latency in UCI transmission.
[0197] Further, as shown in FIG. 11, as an example, HARQ-ACK / SR may be modulated by some sequences such as PN sequences and transmitted on multiple symbols close to the DMRS symbols to benefit from better channel condition, CSI may be encoded by polar codes and also be transmitted on symbols close to the DMRS symbols.
[0198] Further, as an example, a transmission layer with higher channel quality is used for carrying the first type of control signal and data, and a transmission layer with lower channel quality is used for carrying the second type of control signal. The first type of control signal and the second type of control signal may refer to the relevant part in the Manner#A. As an example, assuming transmission layers are numbered in ascending order from higher channel quality to lower channel quality, as shown in FIG. 11 the channel quality of the layer#0 is higher than the channel quality of the layer#1, so the HARQ-ACK / SR and the data are transmitted on the layer#0. For example, the data may be ultra-reliable low latency communications (URLLC) data or higher order modulation modulated data or other data with higher priority. The CSI and the data are transmitted on the layer#1, and the CSI is transmitted close to the DMRS symbols.
[0199] The Manner#1-Manner#2 are examples, limitation is not made herein. For example, the Manner#1 and Manner#2 may be combined. For an example, there are one or more transmission layers are used to transmit the control signal, wherein some one or more transmission layers are used to transmit the control signal and the data, and the rest are used to transmit the data. For another example, there are one or more transmission layers are used to transmit the control signal, and some one or more transmission layers are used to transmit the control signal, and the rest are used to transmit the control signal and the data.
[0200] Referring to FIG. 12, FIG. 12 is an example of Manner#1 and Manner#2 combined of this application. Some transmission layers are used to transmit the control signal and the data, and the rest are used to transmit the data. Specifically, as shown in FIG. 12, a control signal (e.g., HARQ-ACK / SR) and data are transmitted on layer#0, and the data is transmitted on layer#1.
[0201] Referring to FIG. 13, FIG. 13 is another example of Manner#1 and Manner#2 combined of this application. Some transmission layers are used to transmit the control signal, and the rest are used to transmit the data and the control signal. Specifically, as shown in in FIG. 13, a control signal (e.g., HARQ-ACK / SR, and CSI) is transmitted on layer#0, and a control signal (that is CSI) and the data are transmitted on layer#1.
[0202] In some embodiments, the control signal is repeatedly transmitted on one or more transmission layers. In other words, the same control signal may be repeated and transmitted on different transmission layers, and the remaining transmission layers may be used to carry data or other control signals.
[0203] Referring to FIG. 14, FIG. 14 is an example of a repeated control signal and data on different transmission layers of this application. As shown in FIG. 14, taking uplink as an example, the UCI and its repeated version (for example, called repeated UCI) are transmitted on layer#0 and layer#1, and the data are transmitted on layer#2. The UCI may be modulated / represented by PN sequences and such PN sequences span multiple PRBs, or it may be encoded by polar codes.
[0204] In a possible implementation, an MCS of the control signal on different transmission layers is different, or the MCS of the control signal on different transmission layers is the same. In other words, the same control signal may be repeatedly transmitted on different transmission layers using the same or different MCS.
[0205] In a possible implementation, an RV of the control signal on different transmission layers is different. Specifically, the same control signal with different RVs may be transmitted on different layers.
[0206] In another possible implementation, different cyclic precoding may be applied to the control signal repeated on different transmission layers.
[0207] In some embodiments, a transmission layer with higher channel quality (e.g., SNR, CQI, or SINR could be used to reflect a channel quality) is used for carrying the control signal, and a transmission layer with lower channel quality is used for carrying the data. As an example, assuming transmission layers are numbered in ascending order from higher channel quality to lower channel quality, as shown in FIG. 14, the channel quality of the layer#0 is higher than the channel quality of the layer#1, the channel quality of the layer#1 is higher than the channel quality of the layer#2, so the UCI is transmitted on layer#0 and layer#1, and the data is transmitted on layer#2.
[0208] In some embodiments, different types of the control signal are transmitted on different transmission layers or on the same transmission layer. This may refer to the relevant part in the Manner#A.
[0209] In some embodiments, other device (e.g., a base station, or another UE) transmits signaling to indicate information of the control signal transmission piggyback on a data transmission on multiple transmission layers, correspondingly, at S610, the UE determines the information by receiving the signaling.
[0210] Taking the control signal transmission being the uplink control signal transmission as an example, a base station transmits DCI and / or RRC signaling, correspondingly, the UE receives the DCI and / or the RRC signaling. In some embodiments, the DCI and / or the RRC signaling includes one or more of the following information: a transmission layer used for carrying the control signal, information indicating the control signal is repeatedly transmitted, a transmission layer used for carrying data, a way of multiplexing the control signal and the data, a DMRS port used for the two or more transmission layers, an MCS for the control signal. Some of the information is described in detail below, and the rest may refer to the above related description in the Manner#A.
[0211] 1) A transmission layer used for carrying the control signal
[0212] In a possible implementation, the information of the transmission layer used for carrying the control signal includes one or more of: an index of the transmission layer, and the number of the transmission layer.
[0213] 2) A way of multiplexing the control signal and the data
[0214] This information is to configure a transmission layer used for carrying both the control signal and the data. The way to multiplex the control signal and the data may be one or more of the following: TDM, FDM, or CDM. For examples, the control signal and the data may be multiplexed on different OFDM symbols (TDM) , or in different PRBs (FDM) or using different sequences (CDM) or combined manner of them. It may also be configured a way of placement of the control signal and the data, for example, the control signal is placed close to DMRS symbols and the data is placed further to DMRS symbols. The way of placement of the control signal and the data may be pre-defined or carried on the DCI or RRC signaling.
[0215] Manner#A and Manner#B are described above. Manner#A and Manner#B could be used in combination or separately without limitation. For example, in some scenarios Manner#Ais used, and in other scenarios Manner#B is used.
[0216] In some embodiments, the control signal and / or data is scheduled / transmitted on different transmission layers in SU-MIMO or MU-MIMO manner. For example, the base station may schedule the control signal transmission of one or more UEs in an SU-MIMO manner, or in a MU-MIMO manner, or in a combined SU-MIMO and MU-MIMO manner. The following are some implementation.
[0217] In a possible implementation, the control signal and / or the data is scheduled / transmitted on different transmission layers in an SU-MIMO manner. In this implementation, at S620, a single UE transmits the control signal on the one or more transmission layers, and correspondingly, another device (e.g., a base station, or another UE) receives the control signal on the one or more transmission layers.
[0218] Referring to FIG. 15, FIG. 15 is an example of the control signal transmission in the SU-MIMO manner of this application. As shown in FIG. 15, two transmission layers respectively called layer#0 and layer#1 are used for the control signal transmission and a data transmission. The control signal and the data are from a same UE (e.g., UE#1) . Specifically, UE#1 transmits the control signal on the layer#0, and transmits the data on the layer#1.
[0219] In another possible implementation, the control signal and / or the data is scheduled / transmitted on different transmission layers in the MU-MIMO manner. In this implementation, for example, at S620, a first UE (e.g., UE#1) transmits the control signal on one or more transmission layers, and a second UE (e.g., UE#2) transmits data on one or more transmission layers, correspondingly, other device (e.g., a base station, or a third UE) receives the control signal and the data.
[0220] Referring to FIG. 16, FIG. 16 is an example of the control signal transmission and data transmission in the MU-MIMO manner of this application. As shown in FIG. 16, two transmission layers respectively called layer#0 and layer#1 are used for the control signal transmission and data transmission. The control signal and the data from different UEs. Specifically, UE#1 transmits the control signal on the layer#0, and UE#2 transmits the data on the layer#1.
[0221] In another possible implementation, the control signal and / or the data is scheduled / transmitted on different transmission layers in combined SU-MIMO and MU-MIMO manner. In this implementation, for example, at S620, a first UE (e.g., UE#1) transmits a control signal and data on one or more transmission layers, and a second (e.g., UE#2) transmits another control signal or data on one or more transmission layers, and correspondingly, (e.g., a base station, or a third UE) receives the control signal and the data.
[0222] Referring to FIG. 17, FIG. 17 is an example of the control signal transmission and data transmission in the combined SU-MIMO and MU-MIMO manner of this application. As shown in FIG. 17, three transmission layers respectively called layer#0, layer#1, and layer#2 are used for the control signal transmission and data transmission. Specifically, UE#1 transmits a control signal on the layer#0, UE#1 transmits data on the layer#1, and UE#2 transmits another control signal on the layer#2.
[0223] Further, in FIGs 15-17, as an example, one or more transmission layers may be allocated / scheduled / configured to carry the control signal as Manner#A. This may refer to the relevant part in the Manner#A.
[0224] Further, in FIGs 15-17, as an example, one or more transmission layers may be allocated / scheduled / configured to carry data with or without the control signal in which the data and the control signal may be transmitted on different transmission layers respectively or multiplexed on the same transmission layer. This may refer to the relevant part in the Manner#B.
[0225] Further, in FIGs 15-17, as an example, orthogonal DMRS ports may be indicated / configured to a same UE (SU-MIMO) or different UEs (MU-MIMO) on different transmission layers. This may refer to the relevant part in the Manner#Aand the Manner#B.
[0226] In some of the above embodiments, such as FIGS. 7-17, layer#0, layer#1, and layer#2 are mainly used as examples, this application embodiments do not limit the number of a transmission layer configured for a control signal transmission, and this application embodiments do not limit the number of a transmission layer carrying a control signal. The transmission layer configured for the control signal transmission include the transmission layer actual carrying the control signal, that is the two or more transmission layers at S610 include the one or more transmission layers at S620, and taking FIGS. 7-17 as an example, the two or more transmission layers at S610 include layer#0, layer#1, and layer#2.
[0227] The methods according to embodiments of this application are described above in detail with reference to FIGS. 6-17. The apparatuses provided in embodiments of this application are described below in detail with reference to FIGS. 18-19.The description of apparatus embodiments corresponds to the description of the method embodiments. Therefore, for content that is not described in detail, refer to the foregoing method embodiments. For brevity, details are not described herein again.
[0228] Referring to FIG. 18, a schematic block diagram of a communication apparatus according to an embodiment of this application is shown. The communication apparatus 1800 includes a transceiver unit 1810 and a processing unit 1820. The transceiver unit 1810 may implement a corresponding communication function, and the processing unit 1810 is configured to perform data processing. The transceiver unit 1810 may also be referred to as a communication interface or a communication unit.
[0229] In some embodiments, the communication apparatus 1800 may further include a storage unit. The storage unit may be configured to store instructions and / or data. The processing unit 1820 may read instructions and / or data in the storage unit, to enable the communication apparatus to implement the foregoing method embodiments.
[0230] The communication apparatus 1800 may be configured to perform actions performed by the UE in the foregoing method embodiments. In this case, the communication apparatus 1800 may be the UE or a component that can be configured in the UE. The transceiver unit 1810 is configured to perform receiving / transmitting-related operations on the UE side in the foregoing method embodiments. The processing unit 1820 is configured to perform processing-related operations on the UE side in the foregoing method embodiments.
[0231] The communication apparatus 1800 may implement steps or procedures performed by the UE in FIGS. 6-17 according to embodiments of this application. The communication apparatus 1800 may include units configured to perform the method performed by the UE in FIGS. 6-17. In addition, the units in the communication apparatus 1800 and the foregoing other operations and / or functions are separately used to implement corresponding procedures in FIGS. 6-17.
[0232] Alternatively, the communication apparatus 1800 may be configured to perform actions performed by the base station in the foregoing method embodiments. In this case, the communication apparatus 1800 may be the base station or a component that can be configured in the base station. The transceiver unit 1810 is configured to perform receiving / transmitting-related operations on the base station side in the foregoing method embodiments. The processing unit 1820 is configured to perform processing-related operations on the base station side in the foregoing method embodiments.
[0233] The communication apparatus 1800 may implement steps or procedures performed by the base station in FIGS. 6-17 according to embodiments of this application. The communication apparatus 1800 may include units configured to perform the method performed by the base station in FIGS. 6-17. In addition, the units in the communication apparatus 1800 and the foregoing other operations and / or functions are separately used to implement corresponding procedures in FIGS. 6-17.
[0234] A specific process in which the units perform the foregoing corresponding steps is described in detail in the foregoing method embodiments. For brevity, details are not described herein again.
[0235] Referring to FIG. 19, a schematic block diagram of another communication apparatus according to an embodiment of this application is shown. The communication apparatus 1900 includes a processor 1910. The processor 1910 is coupled to a memory 1920. The memory 1920 is configured to store a computer program or instructions and / or data. The processor 1910 is configured to execute the computer program or instructions and / or data stored in the memory 1920, so that the methods in the foregoing method embodiments are executed.
[0236] In some embodiments, the communication apparatus 1900 includes one or more processors 1910.
[0237] In an example, as shown in FIG. 19, the communication apparatus 1900 may further include the memory 1920.
[0238] In some embodiments, the communication apparatus 1900 may include one or more memories 1920.
[0239] In an example, the memory 1920 may be integrated with the processor 1910, or disposed separately from the processor 1910.
[0240] In an example, as shown in FIG. 19, the communication apparatus 1900 may further include a transceiver 1930, where the transceiver 1930 is configured to receive and / or transmit a signal. For example, the processor 1910 may be configured to control the transceiver 1930 to receive and / or transmit a signal.
[0241] In some embodiments, the communication apparatus 1900 may be a UE or a component (e.g., a chip, a circuit, or a processing system) that can be configured in the UE; or the communication apparatus 1900 may be a base station or a component (e.g., a chip, a circuit, or a processing system) that can be configured in the base station.
[0242] In a solution, the communication apparatus 1900 is configured to perform the operations performed by the UE in the foregoing method embodiments.
[0243] For example, the processor 1910 may be configured to perform a processing-related operation performed by the UE in the foregoing method embodiments, and the transceiver 1930 may be configured to perform a receiving / transmitting-related operation performed by the UE in the foregoing method embodiments.
[0244] In another solution, the communication apparatus 1900 is configured to perform the operations performed by the base station in the foregoing method embodiments.
[0245] For example, the processor 1910 may be configured to perform a processing-related operation performed by the base station in the foregoing method embodiments, and the transceiver 1930 may be configured to perform a receiving / transmitting-related operation performed by the base station in the foregoing method embodiments.
[0246] An embodiment of this application further provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions used to implement the method performed by the UE or the method performed by the base station in the foregoing method embodiments.
[0247] For example, when the computer program is executed by a computer, the computer may be enabled to implement the method performed by the UE or the method performed by the base station in the foregoing method embodiments.
[0248] An embodiment of this application further provides a computer program product including instructions. When the instructions are executed by a computer, the computer is enabled to implement the method performed by the UE or the method performed by the base station in the foregoing method embodiments.
[0249] An embodiment of this application further provides a communication system. The communication system includes the UE and the base station in the foregoing embodiments.
[0250] For explanations and beneficial effects of related content of any communication apparatus provided above, refer to a corresponding method embodiment provided above. Details are not described herein again.
[0251] The processor mentioned in embodiments of this application may be a central processing unit (CPU) . The processor may further be another general-purpose processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field programmable gate array (FPGA) , or another programmable logic device, a discrete gate, a transistor logic device, a discrete hardware component, or the like. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor or the like.
[0252] The memory mentioned in embodiments of this application may be a volatile memory or a non-volatile memory, or may include a volatile memory and a non-volatile memory. The non-volatile memory may be a read-only memory (ROM) , a programmable read-only memory (programmable ROM, PROM) , an erasable programmable read-only memory (erasable PROM, EPROM) , an electrically erasable programmable read-only memory (electrically EPROM, EEPROM) , or a flash memory. The volatile memory may be a random access memory (RAM) . For example, the RAM may be used as an external cache. By way of example but not limitation, the RAM may include a plurality of forms such as the following: a static random access memory (static RAM, SRAM) , a dynamic random access memory (dynamic RAM, DRAM) , a synchronous dynamic random access memory (synchronous DRAM, SDRAM) , a double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM) , an enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM) , a synchlink dynamic random access memory (synchlink DRAM, SLDRAM) , and a direct rambus random access memory (direct rambus RAM, DR RAM) .
[0253] It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA, another programmable logic device, a discrete gate or a transistor logic device, or a discrete hardware component, the memory (storage module) may be integrated into the processor.
[0254] It should be further noted that the memory described in this specification is intended to include, but is not limited to, these memories and any other memory of a suitable type.
[0255] A person of ordinary skill in the art may be aware that, in combination with the examples described in embodiments disclosed in this specification, units and methods may be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed by hardware or software depends on particular applications and design constraints of the technical solutions. A person skilled in the art may use different methods to implement the described functions for each particular application, but it should not be considered that the implementation goes beyond the protection scope of this application.
[0256] It may be clearly understood by a person skilled in the art that, for the purpose of convenient and brief description, for a detailed working process of the foregoing apparatus and unit, refer to a corresponding process in the foregoing method embodiment. Details are not described herein again.
[0257] In the several embodiments provided in this application, the disclosed apparatuses and methods may be implemented in other manners. For example, the described apparatus embodiment is merely an example. For example, division into the units is merely logical function division and may be other division in an actual implementation. For example, a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not performed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces. The indirect couplings or communication connections between the apparatuses or units may be implemented in electronic forms, mechanical forms, or other forms.
[0258] The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units may be selected based on an actual requirement to implement the solutions provided in this application.
[0259] In addition, function units in embodiments of this application may be integrated into one unit, or each of the units may exist alone physically, or two or more units may be integrated into one unit.
[0260] All or some of the foregoing embodiments may be implemented by using software, hardware, firmware, or any combination thereof. When the software is used to implement embodiments, all or a part of embodiments may be implemented in a form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the procedures or functions according to embodiments of this application are all or partially generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or another programmable apparatus. For example, the computer may be a personal computer, a server, a network device, or the like. The computer instructions may be stored in a computer-readable storage medium or may be transmitted from a computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center to another website, computer, server, or data center in a wired (for example, a coaxial cable, an optical fiber, or a digital subscriber line (DSL) ) or wireless (for example, infrared, radio, and microwave, or the like) manner. The computer-readable storage medium may be any usable medium accessible by the computer, or a data storage device, for example, a server or a data center, integrating one or more usable media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape) , an optical medium (for example, a DVD) , a semiconductor medium (for example, an SSD) , or the like. For example, the usable medium may include but is not limited to any medium that can store program code, such as a USB flash drive, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disc.
[0261] The foregoing description is merely a specific implementation of this application, but is not intended to limit the protection scope of this application. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims and the specification.
Claims
1.A communication method, comprising:determining information of two or more transmission layers for a control signal transmission; andtransmitting a control signal on one or more transmission layers out of the two or more transmission layers.2.The method according to claim 1, wherein the transmitting a control signal on one or more transmission layers out of the two or more transmission layers comprises:transmitting the control signal without being multiplexed with data on the one or more transmission layers out of the two or more transmission layers.3.The method according to claim 1, wherein the transmitting a control signal on one or more transmission layers out of the two or more transmission layers comprises:transmitting the control signal with data on the one or more transmission layers out of the two or more transmission layers.4.The method according to claim 3, whereina transmission layer used for carrying the data is the same as a transmission layer used for carrying the control signal; ora transmission layer used for carrying the data is different from a transmission layer used for carrying the control signal; orone or more of transmission layers used for carrying the data are the same as a transmission layer used for carrying the control signal.5.The method according to claim 3 or 4, wherein a transmission layer with higher channel quality is used for carrying the control signal, and a transmission layer with lower channel quality is used for carrying the data.6.The method according to any one of claims 1-5, wherein the control signal comprises a first type of control signal and a second type of control signal, and the two or more transmission layers comprise a first transmission layer and a second transmission layer;the transmitting a control signal on one or more transmission layers out of the two or more transmission layers comprises:transmitting the first type of control signal on the first transmission layer, and transmitting the second type of control signal on the second transmission layer.7.The method according to claim 6, wherein a transmission layer with higher channel quality is used for carrying the first type of control signal, and a transmission layer with lower channel quality is used for carrying the second type of control signal;wherein the first type of control signal comprises a service request and / or acknowledgement of a hybrid automatic repeat request process, and the second type of control signal is channel state information; orwherein the first type of control signal is acknowledgement of a hybrid automatic repeat request process, and the second type of control signal is a service request.8.The method according to any one of claims 1-5, wherein the control signal comprises a first type of control signal and a second type of control signal, and the first type of control signal and the second type of control signal are transmitted on the same transmission layer.9.The method according to any one of claims 1-8, wherein the control signal is repeatedly transmitted on the one or more transmission layers out of the two or more transmission layers.10.The method according to claim 9, wherein one or more encoded bits of the control signal are repeatedly transmitted on the one or more transmission layers out of the two or more transmission layers, and / or, the same or different redundancy version of the control signal is transmitted on the one or more transmission layers out of the two or more transmission layers.11.The method according to any one of claims 1-10, wherein the determining information of the two or more transmission layers comprises:receiving downlink control information or sidelink control information, and / or radio resource control signaling indicating the information of the two or more transmission layers.12.The method according to claim 11, wherein the downlink control information or sidelink control information, and / or radio resource control signaling comprises one or more of the following information:a time domain resource, a frequency domain resource, the two or more transmission layers for the control signal transmission, a transmission layer used for carrying the control signal, information indicating the control signal is repeatedly transmitted, a transmission layer used for the repeatedly transmitted control signal, a transmission occasion, a transmission layer used for carrying different types of control signals, a transmission layer used for carrying data, a way of multiplexing the control signal and the data, a demodulation reference signal port used for the two or more transmission layers, a modulation and coding scheme for the control signal, or a type of the control signal on the two or more transmission layers.13.The method according to any one of claims 1-12, wherein the control signal comprises an uplink control signal or a sidelink control signal.14.A communication method, comprising:determining information of two or more transmission layers for a control signal transmission; andreceiving a control signal on one or more transmission layers out of the two or more transmission layers.15.The method according to claim 14, wherein the receiving a control signal on one or more transmission layers out of the two or more transmission layers, comprises:receiving the control signal without being multiplexed with data on the one or more transmission layers out of the two or more transmission layers.16.The method according to claim 14, the receiving a control signal on one or more transmission layers out of the two or more transmission layers comprises:receiving the control signal with data on the one or more transmission layers out of the two or more transmission layers.17.The method according to claim 16, whereina transmission layer used for carrying the data is the same as a transmission layer used for carrying the control signal; ora transmission layer used for carrying the data is different from a transmission layer used for carrying the control signal; orone or more of transmission layers used for carrying the data are the same as a transmission layer used for carrying the control signal.18.The method according to claim 16 or 17, wherein a transmission layer with higher channel quality is used for carrying the control signal, and a transmission layer with lower channel quality is used for carrying the data.19.The method according to any one of claims 14-17, wherein the control signal comprises a first type of control signal and a second type of control signal, and the two or more transmission layers comprise a first transmission layer and a second transmission layer;the receiving a control signal on one or more transmission layers out of the two or more transmission layers comprises:receiving the first type of control signal on the first transmission layer, and receiving the second type of control signal on the second transmission layer.20.The method according to claim 19, wherein a transmission layer with higher channel quality is used for carrying the first type of control signal, and a transmission layer with lower channel quality is used for carrying the second type of control signal;wherein the first type of control signal comprises a service request and / or acknowledgement of a hybrid automatic repeat request process, and the second type of control signal is channel state information; orwherein the first type of control signal is acknowledgement of a hybrid automatic repeat request process, and the second type of control signal is a service request.21.The method according to any one of claims 14-18, wherein the control signal comprises a first type of control signal and a second type of control signal, and the first type of control signal and the second type of control signal are received on the same transmission layer.22.The method according to any one of claims 14-21, wherein the control signal is repeatedly received on the one or more transmission layers out of the two or more transmission layers.23.The method according to claim 22, wherein one or more bits of the control signal are repeatedly received on the one or more transmission layers out of the two or more transmission layers, and / or, the same or different redundancy version of the control signal is received on the one or more transmission layers out of the two or more transmission layers.24.The method according to any one of claims 14-23, wherein the method further comprises:transmitting downlink control information or sidelink control information, and / or radio resource control signaling indicating the information of the two or more transmission layers.25.The method according to claim 24, wherein the downlink control information or sidelink control information, and / or radio resource control signaling comprises one or more of the following information:a time domain resource, a frequency domain resource, the two or more transmission layers for the control signal transmission, a transmission layer used for carrying the control signal, information indicating the control signal is repeatedly transmitted, a transmission layer used for the repeatedly transmitted control signal, a transmission occasion, a transmission layer used for carrying different types of control signals, a transmission layer used for carrying data, a way of multiplexing the control signal and the data, a demodulation reference signal port used for the two or more transmission layers, a modulation and coding scheme for the control signal, or a type of the control signal on the two or more transmission layers.26.The method according to any one of claims 14-25, wherein the control signal comprises an uplink control signal or a sidelink control signal.27.An apparatus, wherein the apparatus comprises a processor, wherein the processor is configured to execute one or more instructions stored in a memory, to enable the apparatus to implement the method according to any one of claims 1-13 or claims 14-26.28.The apparatus according to claim 27, wherein the apparatus comprises the memory.29.The apparatus according to claim 27 or 28, wherein the apparatus comprises a communication interface, configured to input and / or output information.30.The apparatus according to any one of claims 27-29, wherein the apparatus is a communication device, or a chip, or a circuit.31.An apparatus, wherein the apparatus comprises a function or unit to perform the method according to any one of claims 1-13 or perform the method according to any one of claims 14-26.32.A computer readable storage medium, comprising one or more instructions, wherein when the instructions are run on a computer, the computer performs the method according to any one of claims 1-13, or the method according to any one of claims 14-26.33.A computer program, wherein when the computer program is executed by a computer, a communication apparatus is enabled to implement the method according to any one of claims 1-13, or the method according to any one of claims 14-26.34.A computer program product, comprising one or more instructions, wherein when the instructions are executed by a computer, a communication apparatus is enabled to implement the method according to any one of claims 1-13, or the method according to any one of claims 14-26.35.A communication system, comprising: a first communication apparatus and a second communication apparatus, wherein the first communication apparatus is configured to perform the method according to any one of claims 1-13, and the second communication apparatus is configured to perform the method according to any one of claims 14-26.36.An apparatus for implementing the method according to any one of claims 1-13 or claims 14-26.