WO2025246736A1 - 一种通信方法及装置 - Google Patents
一种通信方法及装置Info
- Publication number
- WO2025246736A1 WO2025246736A1 PCT/CN2025/090363 CN2025090363W WO2025246736A1 WO 2025246736 A1 WO2025246736 A1 WO 2025246736A1 CN 2025090363 W CN2025090363 W CN 2025090363W WO 2025246736 A1 WO2025246736 A1 WO 2025246736A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reference signal
- demodulation reference
- pattern
- indication information
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
Definitions
- This application relates to the field of wireless technology, and more particularly to a communication method and apparatus.
- channel estimation can be performed to facilitate communication based on the estimation results.
- device A can send a demodulation reference signal (DMRS) to device B, and device B can then perform channel estimation using the DMRS sent by device A.
- DMRS demodulation reference signal
- device A can be a terminal device
- device B can be a network device.
- MIMO technology is a key technology in wireless communication, used to meet high-speed transmission requirements.
- multiple devices A may send DMRS to device B.
- Device B can then estimate the channel between itself and each of the individual devices A based on the DMRS sent by each device A.
- MU-MIMO multi-user MIMO
- multiple terminal devices can send DMRS to the network device, and the network device can then estimate the channel between itself and each terminal device based on the DMRS sent by each terminal device.
- This application provides a communication method that can improve the accuracy of channel estimation.
- this application provides a communication method, which can be applied, for example, to a first communication device, which is a terminal or a component (or device) within a terminal.
- the component in this application may include, for example, at least one of a chip, a chip system, a processor, a transceiver, a processing unit, a circuit, a functional module, or a transceiver unit.
- the first communication device can receive first indication information, which indicates a first demodulation reference signal and a second demodulation reference signal, wherein the second demodulation reference signal is a zero-power demodulation reference signal with zero power.
- a first physical uplink shared channel can be sent to a second communication device according to the first indication information.
- the first PUSCH carries the aforementioned first and second demodulation reference signals, which are used for channel estimation.
- the first PUSCH sent by the first communication device carries not only the first demodulation reference signal but also an additional second demodulation reference signal with zero power. This enables the second communication device to estimate interference from PUSCHs of other devices by combining the second PUSCH, thereby improving the accuracy of channel estimation by the second communication device.
- the pattern of the second demodulation reference signal may be related to the first signal waveform corresponding to the first PUSCH. Therefore, in one example, the first indication information may include the first signal waveform, through which the pattern of the second demodulation reference signal is indicated.
- the first communication device can determine the pattern of the second demodulation reference signal based on a first correspondence between the signal waveform and the pattern and the first signal waveform.
- the first correspondence mentioned here may be a correspondence between an identifier of a signal waveform and a pattern identifier (e.g., a pattern index).
- the first correspondence may include multiple correspondences, at least including the correspondence between the first signal waveform and the pattern of the second demodulation reference signal.
- the pattern of the second demodulation reference signal may be associated with a first sequence corresponding to the first demodulation reference signal (e.g., a pre-demodulation reference signal). Therefore, in one example, the first indication information may include the first sequence, through which the pattern of the second demodulation reference signal is indicated.
- the first communication device can determine the pattern of the second demodulation reference signal based on a second correspondence between the sequence and the pattern and the first sequence.
- the second correspondence mentioned herein can be a correspondence between a sequence identifier and a pattern identifier (e.g., a pattern index).
- the second correspondence can include multiple correspondences, at least including the correspondence between the first sequence and the pattern of the second demodulation reference signal.
- the pattern of the second demodulation reference signal may be related to both the aforementioned first signal waveform and the first sequence.
- the first indication information may include the first signal waveform and the first sequence
- the pattern of the second demodulation reference signal may be indicated by the first signal waveform and the first sequence.
- the first communication device can determine the pattern of the second demodulation reference signal based on a third correspondence between the signal waveform, the sequence, and the pattern, and the first signal waveform and the first sequence.
- the third correspondence mentioned herein can be a correspondence between the identifier of the signal waveform, the identifier of the sequence, and the identifier of the pattern.
- the third correspondence can include multiple correspondences, at least including the correspondence between the first signal waveform, the first sequence, and the pattern of the second demodulation reference signal.
- the pattern index of the second demodulated reference signal can be used to determine the pattern of the second demodulated reference signal. Therefore, in one example, the first indication information includes the pattern index of the second demodulated reference signal, which indicates the pattern of the second demodulated reference signal.
- the pattern of the second demodulated reference signal includes information on both time-domain and frequency-domain resources it occupies.
- the time-domain resources occupied by the second demodulated reference signal can be indicated by the first indication information.
- the time-domain resources occupied by the second demodulated reference signal can be indicated by the index of the orthogonal frequency division multiplexing (OFDM) symbols occupied by the second demodulated reference signal. Therefore, the first indication information can include the index of the OFDM symbols occupied by the second demodulated reference signal, which indicates the position of the OFDM symbols occupied by the second demodulated reference signal.
- OFDM orthogonal frequency division multiplexing
- the position of the OFDM symbols occupied by the second demodulated reference signal can be determined by the difference between the index of the OFDM symbols occupied by the first demodulated reference signal and the index of the OFDM symbols occupied by the second demodulated reference signal (referred to as the index difference). Therefore, the first indication information may include the index difference, which indicates the position of the OFDM symbol occupied by the second demodulation reference signal.
- the frequency domain resources occupied by the second demodulation reference signal can be indicated by the first indication information. Specifically: if the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth, the location may include the starting frequency resource location and the sparse density; if the frequency resources corresponding to the second demodulation reference signal occupy at least one resource block on the scheduling bandwidth, the location includes at least two of the following: the starting location, the ending location, and the resource block size for each of the at least one resource block.
- the frequency resources corresponding to the second demodulation reference signal are thinned out and mapped onto the scheduling bandwidth to maintain a low peak-to-average power ratio for the low-carrier waveform. If the first signal waveform is a multi-carrier waveform, the frequency resources corresponding to the second demodulation reference signal occupy at least one resource block on the scheduling bandwidth, or the frequency resources corresponding to the second demodulation reference signal are thinned out and mapped onto the scheduling bandwidth.
- the at least one resource block can correspond one-to-one with at least one precoded subband precoded by the network device. In this way, when the second communication device evaluates interference from other terminal devices based on the second demodulation reference, it can estimate the interference from other terminal devices on each precoded subband.
- the first demodulation reference signal includes: a pre-demodulation reference signal, or a pre-demodulation reference signal and an additional demodulation reference signal. That is, using this scheme, in addition to the pre-demodulation reference signal and the additional demodulation reference signal, a zero-power demodulation reference signal is introduced during channel estimation, thereby effectively improving the accuracy of signal estimation.
- the first demodulation reference signal and the second demodulation reference signal need to have a certain degree of isolation, so that the network device can assess interference from other terminal devices based on the second demodulation reference signal.
- the first demodulation reference signal and the second demodulation reference signal are time-division multiplexed.
- the non-demodulation reference signal carrier position on the OFDM symbol where the second demodulation reference signal is located is used to transmit user data, thereby effectively utilizing the resources of the first PUSCH.
- this application provides a communication method, which can be applied, for example, to a second communication device.
- the second communication device is a network device or a component (or apparatus) within a network device.
- the second communication device can send first indication information to a first communication device, the first indication information indicating a first demodulation reference signal and a second demodulation reference signal, wherein the second demodulation reference signal is a zero-power demodulation reference signal with zero power.
- the first communication device can be a terminal or a component within a terminal.
- the second communication device receives a first PUSCH sent by the first communication device according to the first indication information.
- the first PUSCH carries the aforementioned first and second demodulation reference signals, which are used for channel estimation.
- the first PUSCH sent by the first communication device carries not only the first demodulation reference signal but also an additional second demodulation reference signal with zero power, thereby enabling the second communication device to estimate interference from PUSCHs of other terminal devices by combining the second PUSCH, thus improving the accuracy of channel estimation performed by the second communication device.
- the first indication information includes: a first signal waveform corresponding to the first PUSCH and/or a first sequence corresponding to the first demodulation reference signal, wherein the first signal waveform and/or the first sequence are used to determine the pattern of the second demodulation reference signal.
- the first indication information includes: a pattern index of the second demodulation reference signal, the pattern index of the second demodulation reference signal being used to determine the pattern of the second demodulation reference signal.
- the first indication information includes: an index of the orthogonal frequency division multiplexing (OFDM) symbol occupied by the second demodulation reference signal; or, an index difference, the index difference being the difference between the index of the OFDM symbol occupied by the first demodulation reference signal and the index of the OFDM symbol occupied by the second demodulation reference signal, wherein the index of the OFDM symbol or the index difference is used to indicate the pattern of the second demodulation reference signal.
- OFDM orthogonal frequency division multiplexing
- the first indication information includes: the location of the frequency resource corresponding to the second demodulation reference signal, wherein: if the frequency resource corresponding to the second demodulation reference signal is sparsely mapped onto the scheduling bandwidth, the location includes: the starting frequency resource location and the sparse density; or, if the frequency resource corresponding to the second demodulation reference signal occupies at least one resource block on the scheduling bandwidth, the location includes: at least two of the following: the starting position, the ending position, and the size of each resource block in the at least one resource block.
- the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth; or, if the first signal waveform is a multi-carrier waveform, the frequency resources corresponding to the second demodulation reference signal occupy at least one resource block on the scheduling bandwidth, or the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth.
- the at least one resource block corresponds one-to-one with at least one precoded subband that is precoded.
- the first demodulation reference signal includes: a pre-demodulation reference signal, or a pre-demodulation reference signal and an additional demodulation reference signal.
- the first demodulation reference signal and the second demodulation reference signal are time-division multiplexed.
- the non-demodulation reference signal carrier position on the OFDM symbol where the second demodulation reference signal is located is used to transmit user data.
- the second communication device may further send second indication information to the third communication device.
- This second indication information indicates a third demodulation reference signal and a fourth demodulation reference signal, where the fourth demodulation reference signal is a zero-power demodulation reference signal with zero power.
- the port number used to send the third demodulation reference signal is the same as the port number used to send the first demodulation reference signal.
- the device receives a second PUSCH sent by the third communication device based on the second indication information. This second PUSCH carries the third and fourth demodulation reference signals, which are used for channel estimation.
- the third communication device is also a terminal or a component (or device) within a terminal. The first and third communication devices correspond to different terminal devices.
- the second demodulation reference signal indicated by the second communication device to the first communication device and the fourth demodulation reference signal indicated by the second communication device to the third communication device require different resources.
- the fourth demodulation reference signal and the second demodulation reference signal are time-division multiplexed, and/or the fourth demodulation reference signal and the second demodulation reference signal occupy different resource blocks in terms of frequency.
- this application provides a communication device applied to the first communication device described in the first aspect above.
- the device includes: a receiving unit configured to receive first indication information, the first indication information indicating a first demodulation reference signal and a second demodulation reference signal, the second demodulation reference signal being a zero-power demodulation reference signal with zero power; and a transmitting unit configured to transmit a first physical uplink shared channel (PUSCH) according to the first indication information, the first PUSCH carrying the first demodulation reference signal and the second demodulation reference signal, the first demodulation reference signal and the second demodulation reference signal being used for channel estimation.
- PUSCH physical uplink shared channel
- the first indication information includes: a first signal waveform corresponding to the first PUSCH and/or a first sequence corresponding to the first demodulation reference signal, the first signal waveform and/or the first sequence being used to determine the pattern of the second demodulation reference signal; the apparatus further includes: a processing unit, used to determine the pattern of the second demodulation reference signal based on the first signal waveform and/or the first sequence before transmitting the first PUSCH.
- the processing unit is configured to: determine the pattern of the second demodulation reference signal based on the first signal waveform and a first correspondence between the signal waveform and the pattern, wherein the first correspondence includes at least the correspondence between the first signal waveform and the pattern of the second demodulation reference signal; or, determine the pattern of the second demodulation reference signal based on the first sequence and a second correspondence between the sequence and the pattern, wherein the second correspondence includes at least the correspondence between the first sequence and the pattern of the second demodulation reference signal; or, determine the pattern of the second demodulation reference signal based on the first signal waveform, the first sequence, and a third correspondence between the signal waveform, the sequence, and the pattern, wherein the third correspondence includes at least the correspondence between the first signal waveform, the first sequence, and the pattern of the second demodulation reference signal.
- the first indication information includes: a pattern index of the second demodulation reference signal, the pattern index of the second demodulation reference signal being used to determine the pattern of the second demodulation reference signal.
- the first indication information includes: an index of the orthogonal frequency division multiplexing (OFDM) symbol occupied by the second demodulation reference signal; or, an index difference, wherein the index difference is the difference between the index of the OFDM symbol occupied by the first demodulation reference signal and the index of the OFDM symbol occupied by the second demodulation reference signal, and the index of the OFDM symbol or the index difference is used to indicate the pattern of the second demodulation reference signal.
- OFDM orthogonal frequency division multiplexing
- the first indication information includes: the location of the frequency resource corresponding to the second demodulation reference signal, wherein: if the frequency resource corresponding to the second demodulation reference signal is sparsely mapped onto the scheduling bandwidth, the location includes: the starting frequency resource location and the sparse density; or, if the frequency resource corresponding to the second demodulation reference signal occupies at least one resource block on the scheduling bandwidth, the location includes: at least two of the following: the starting position, the ending position, and the resource block size of each resource block in the at least one resource block.
- the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth; or, if the first signal waveform is a multi-carrier waveform, the frequency resources corresponding to the second demodulation reference signal occupy at least one resource block on the scheduling bandwidth, or the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth.
- the at least one resource block corresponds one-to-one with at least one precoded subband that is precoded.
- the first demodulation reference signal includes: a pre-demodulation reference signal, or a pre-demodulation reference signal and an additional demodulation reference signal.
- the first demodulation reference signal and the second demodulation reference signal are time-division multiplexed.
- the non-demodulation reference signal carrier position on the OFDM symbol where the second demodulation reference signal is located is used to transmit user data.
- inventions of this application provide a communication device applied to the second communication device described in the second aspect above.
- the device includes: a transmitting unit, configured to transmit first indication information, the first indication information being used to indicate a first demodulation reference signal and a second demodulation reference signal, the second demodulation reference signal being a zero-power demodulation reference signal with zero power; and a receiving unit, configured to receive a first physical uplink shared channel (PUSCH) transmitted based on the first indication information, the first PUSCH carrying the first demodulation reference signal and the second demodulation reference signal, the first demodulation reference signal and the second demodulation reference signal being used for channel estimation.
- PUSCH physical uplink shared channel
- the first indication information includes: a first signal waveform corresponding to the first PUSCH and/or a first sequence corresponding to the first demodulation reference signal, wherein the first signal waveform and/or the first sequence are used to determine the pattern of the second demodulation reference signal.
- the first indication information includes: a pattern index of the second demodulation reference signal, the pattern index of the second demodulation reference signal being used to determine the pattern of the second demodulation reference signal.
- the first indication information includes: an index of the orthogonal frequency division multiplexing (OFDM) symbol occupied by the second demodulation reference signal; or, an index difference, the index difference being the difference between the index of the OFDM symbol occupied by the first demodulation reference signal and the index of the OFDM symbol occupied by the second demodulation reference signal, wherein the index of the OFDM symbol or the index difference is used to indicate the pattern of the second demodulation reference signal.
- OFDM orthogonal frequency division multiplexing
- the first indication information includes: the location of the frequency resource corresponding to the second demodulation reference signal, wherein: if the frequency resource corresponding to the second demodulation reference signal is sparsely mapped onto the scheduling bandwidth, the location includes: the starting frequency resource location and the sparse density; or, if the frequency resource corresponding to the second demodulation reference signal occupies at least one resource block on the scheduling bandwidth, the location includes: at least two of the following: the starting position, the ending position, and the size of each resource block in the at least one resource block.
- the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth; or, if the first signal waveform is a multi-carrier waveform, the frequency resources corresponding to the second demodulation reference signal occupy at least one resource block on the scheduling bandwidth, or the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth.
- the at least one resource block corresponds one-to-one with at least one precoded subband that is precoded.
- the first demodulation reference signal includes: a pre-demodulation reference signal, or a pre-demodulation reference signal and an additional demodulation reference signal.
- the first demodulation reference signal and the second demodulation reference signal are time-division multiplexed.
- the non-demodulation reference signal carrier position on the OFDM symbol where the second demodulation reference signal is located is used to transmit user data.
- the transmitting unit is further configured to: transmit second indication information, the second indication information being used to indicate a third demodulation reference signal and a fourth demodulation reference signal, the fourth demodulation reference signal being a zero-power demodulation reference signal with zero power, wherein: the port number used to transmit the third demodulation reference signal is the same as the port number used to transmit the first demodulation reference signal; the receiving unit is further configured to receive a second PUSCH transmitted based on the second indication information, the second PUSCH carrying the third demodulation reference signal and the fourth demodulation reference signal, the third demodulation reference signal and the fourth demodulation reference signal being used for channel estimation; wherein: the fourth demodulation reference signal and the second demodulation reference signal are time-division multiplexed, and/or, the fourth demodulation reference signal and the second demodulation reference signal occupy different resource blocks in terms of frequency.
- this application provides a communication device including at least one processor coupled to a memory.
- the processor is configured to execute the method that implements the first aspect or any possible implementation of the first aspect.
- the memory is configured to store a program or instructions; the at least one processor is configured to execute the program or instructions to cause the apparatus to implement the method that implements the first aspect or any possible implementation of the first aspect.
- the processor is configured to execute the method that implements the second aspect or any possible implementation thereof.
- the memory is configured to store a program or instructions; the at least one processor is configured to execute the program or instructions to cause the apparatus to implement the method that implements the second aspect or any possible implementation thereof.
- this application provides a communication device including at least one logic circuit and an input/output interface.
- the logic circuit is used to perform the method described in the first aspect and any of its possible implementations as described above.
- logic circuit is used to perform the method described in the second aspect described above and any of its possible implementations.
- this application provides a computer-readable storage medium for storing one or more computer-executable instructions, which, when executed by a processor, perform the method as described in any of the possible implementations of any of the first to second aspects described above.
- this application provides a computer program product (or computer program) that, when executed by a processor, performs a method of any possible implementation of any one of the first to second aspects described above.
- this application provides a chip system including at least one processor for supporting a communication device in implementing the functions involved in any possible implementation of any of the first to second aspects described above.
- the chip system may further include a memory for storing program instructions and data necessary for the communication device.
- the chip system may be composed of chips or may include chips and other discrete devices.
- the chip system may also include interface circuitry that provides program instructions and/or data to the at least one processor.
- this application provides a communication system comprising: a first device for performing the method described in the first aspect and any one of the first aspects above, and a second device for performing the method described in the second aspect and any one of the second aspects above.
- Figure 1a is a schematic diagram of an exemplary application scenario provided by an embodiment of this application.
- Figure 1b is a schematic diagram of the architecture of the communication system 1000 used in the embodiments of this application.
- Figure 2a is a schematic diagram of a type 1 DMRS provided in an embodiment of this application.
- Figure 2b is a schematic diagram of a type 2 DMRS provided in an embodiment of this application.
- Figure 2c is a schematic diagram of a downlink MU-MIMO scenario provided in an embodiment of this application.
- Figure 2d is a schematic diagram of an uplink MU-MIMO scenario provided in an embodiment of this application.
- Figure 2e is a schematic diagram of a port corresponding to DMRS provided in an embodiment of this application.
- Figure 2f is a schematic diagram of the layout of an orthogonal port supported by DMRS provided in an embodiment of this application;
- FIG. 3 is a flowchart illustrating a communication method provided in an embodiment of this application.
- Figure 4a is a schematic diagram of a pattern of a first demodulation reference signal and a second demodulation reference signal provided in an embodiment of this application;
- Figure 4b is a schematic diagram of another pattern of a first demodulation reference signal and a second demodulation reference signal provided in an embodiment of this application;
- Figure 4c is a schematic diagram of the zero-power demodulation reference signal provided in an embodiment of this application.
- Figure 5 is a schematic diagram of the structure of a communication device provided in an embodiment of this application.
- FIG. 6 is a schematic diagram of another communication device provided in an embodiment of this application.
- FIG. 7 is a schematic diagram of another communication device provided in an embodiment of this application.
- Figure 8 is a schematic diagram of another communication device provided in an embodiment of this application.
- This application provides a communication method that can improve the accuracy of channel estimation.
- Figure 1a is a schematic diagram of an exemplary application scenario provided by an embodiment of this application
- the scenario shown in Figure 1a includes a network device and a terminal device.
- the scenario shown in Figure 1a involves communication between a network device and a terminal device
- the solution of this application can also be applied to scenarios where terminal devices communicate with each other. That is, the network device shown in Figure 1a can also be replaced by a terminal device.
- communication between a network device and a terminal device will be used as an example for illustration.
- the terminal device can send a PUSCH to the network device, and the network device performs channel estimation based on the DMRS grown in the PUSCH.
- the network device is a device deployed in a radio access network (RAN) to provide wireless communication functions for terminal devices.
- the network device may include various forms of macro base stations, micro base stations (also called small stations), relay stations, access points, etc.
- the name of the network device may differ in scenarios employing different wireless access technologies, for example:
- network equipment can be a base transceiver station (BTS).
- GSM Global System for Mobile Communication
- CDMA Code Division Multiple Access
- BTS base transceiver station
- network equipment can be a base station (BS) in a node.
- BS base station
- LTE long term evolution
- network equipment can be an evolved NodeB (eNodeB).
- eNodeB evolved NodeB
- the network device can be a wireless controller.
- Network equipment can also be base station equipment in 5G networks or future communication systems, or network equipment in future evolved public land mobile networks (PLMNs).
- Network equipment can also be wearable devices or vehicle-mounted devices.
- Network equipment can also be a transmission and reception point (TRP).
- TRP transmission and reception point
- network device can be understood as a collective term for all devices (including sites) on the network side; for example, multiple sites can be collectively referred to as network devices.
- a site refers to a transmission node located at a specific physical location.
- network devices can include sites.
- the terminal device involved may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem with wireless communication capabilities.
- the terminal may be a mobile station (MS), subscriber unit, cellular phone, smartphone, wireless data card, personal digital assistant (PDA) computer, tablet computer, wireless modem, handset, laptop computer, machine-type communication (MTC) terminal, etc.
- MS mobile station
- PDA personal digital assistant
- MTC machine-type communication
- FIG. 1b is a schematic diagram of the architecture of the communication system 1000 used in the embodiments of this application.
- the communication system 1000 includes a RAN 100 and a core network 200.
- the communication system 1000 may also include an Internet 300.
- the RAN 100 includes at least one RAN node (as shown in Figure 1b, 110a and 110b, collectively referred to as 110; the aforementioned network devices can correspond to RAN nodes), and may also include at least one terminal (as shown in Figure 1b, 120a-120j, collectively referred to as 120).
- the RAN 100 may also include other RAN nodes, such as wireless relay devices and/or wireless backhaul devices (not shown in Figure 1b).
- the terminal 120 is wirelessly connected to the RAN node 110, and the RAN node 110 is wirelessly or wiredly connected to the core network 200.
- the core network equipment in core network 200 and the RAN node 110 in RAN 100 can be independent physical devices, or they can be the same physical device that integrates the logical functions of the core network equipment and the logical functions of the RAN node.
- Terminals can be interconnected with each other, and RAN nodes can be interconnected with each other, via wired or wireless means.
- RAN100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, or a future radio access system as defined in the 3rd generation partnership project (3GPP).
- E-UTRA evolved universal terrestrial radio access
- NR new radio
- 3GPP 3rd generation partnership project
- RAN100 can also include two or more of the above-mentioned different radio access systems.
- RAN100 can also be an open RAN (O-RAN).
- RAN nodes also known as radio access network devices, RAN entities, or access nodes, are used to help terminals access communication systems wirelessly.
- an RAN node can be a base station, an evolved RAN base station, a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, a next-generation NodeB in a 6G mobile communication system, or a base station in a future mobile communication system.
- RAN nodes can be macro base stations (such as 110a in Figure 1b), micro base stations or indoor stations (such as 110b in Figure 1b), relay nodes, or donor nodes.
- a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU).
- the CU performs the functions of the base station's Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP), and can also perform the functions of the Service Data Adaptation Protocol (SDAP).
- RRC Radio Resource Control
- PDCP Packet Data Convergence Protocol
- SDAP Service Data Adaptation Protocol
- the DU performs the functions of the base station's Radio Link Control (RANC) and Medium Access Control (MAC) layers, and can also perform some or all of the physical layer functions.
- RRC Radio Resource Control
- PDCP Packet Data Convergence Protocol
- SDAP Service Data Adaptation Protocol
- the DU performs the functions of the base station's Radio Link Control (RANC) and Medium Access Control (MAC) layers, and can also perform some or all of the physical layer functions.
- RRC Radio Resource Control
- MAC Medium Access Control
- the RU can be used to implement radio frequency signal transmission and reception.
- the CU and DU can be two independent RAN nodes, or they can be integrated into the same RAN node, such as within a baseband unit (BBU).
- RUs can be included in radio frequency equipment, such as remote radio units (RRUs) or active antenna units (AAUs).
- RRUs remote radio units
- AAUs active antenna units
- CUs can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.
- RAN nodes may have different names.
- a CU can also be called an O-CU (open CU)
- a DU can also be called an O-DU
- a CU-CP can also be called an O-CU-CP
- a CU-UP can also be called an O-CU-UP
- a RU can also be called an O-RU.
- this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.
- This protocol layer may include a control plane protocol layer and a user plane protocol layer.
- the control plane protocol layer may include at least one of the following: radio resource control (RRC) layer, packet data convergence protocol (PDCP) layer, radio link control (RLC) layer, media access control (MAC) layer, or physical (PHY) layer, etc.
- the user plane protocol layer may include at least one of the following: service data adaptation protocol (SDAP) layer, PDCP layer, RLC layer, MAC layer, or physical layer, etc.
- SDAP service data adaptation protocol
- a terminal is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from a base station.
- Terminals can also be called terminal equipment, user equipment (UE), mobile station, mobile terminal, etc.
- Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc.
- Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technology or device form used in the terminal.
- Base stations and terminals can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminals.
- base stations and terminals can be relative.
- the helicopter or drone 120i in Figure 1 can be configured as a mobile base station.
- terminal 120i For terminals 120j that access the wireless access network 100 through 120i, terminal 120i is a base station; however, for base station 110a, 120i is a terminal, meaning that 110a and 120i communicate via a wireless air interface protocol.
- 110a and 120i can also communicate via a base station-to-base station interface protocol.
- relative to 110a, 120i is also a base station. Therefore, both base stations and terminals can be collectively referred to as communication devices.
- 110a and 110b in Figure 1 can be called communication devices with base station functions
- 120a-120j in Figure 1 can be called communication devices with terminal functions.
- Communication between base stations and terminals, between base stations, and between terminals can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously.
- the embodiments of this application do not limit the spectrum resources used for wireless communication.
- the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions.
- This control subsystem, including base station functions can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities.
- the functions of the terminal can be executed by modules (such as chips or modems) within the terminal, or by a device that includes terminal functions.
- MIMO technology as a key technology in wireless communication, can be used to meet the demand for high-speed transmission.
- the terminal device can send DMRS to the network device, and the network device can use the DMRS to perform channel estimation to facilitate subsequent communication with the terminal device.
- DMRS includes: DMRS based on the physical downlink shared channel (PDSCH), DMRS based on the physical downlink control channel (PDCCH), DMRS based on the physical uplink shared channel (PUSCH), and DMRS based on the physical uplink control channel (PUCCH).
- PDSCH physical downlink shared channel
- PDCCH physical downlink control channel
- PUSCH physical uplink shared channel
- PUCCH physical uplink control channel
- DMRS includes two types: type 1 and type 2.
- Figure 2a is a schematic diagram of a type 1 DMRS provided in an embodiment of this application.
- each small square represents a resource, where the horizontal axis represents time-domain resources and the vertical axis represents frequency-domain resources.
- Each small square corresponds to one OFDM symbol in the time domain and one frequency-domain resource element (RE) in the frequency domain.
- RE frequency-domain resource element
- the DMRS shown on the left in Figure 2a occupies a single orthogonal frequency division multiplexing (OFDM) symbol in the time domain, while the DMRS shown on the right in Figure 2a occupies two OFDM symbols in the time domain.
- OFDM orthogonal frequency division multiplexing
- Type 1 DMRS has a frequency domain density of 1/2.
- the corresponding antenna port numbers are 1000–1003; for the DMRS pattern on the right side of Figure 2a, the corresponding antenna port numbers are 1000–1007.
- the shaded squares in Figure 2a are used to distinguish different code division multiplexing (CDM) groups.
- CDM code division multiplexing
- One shade corresponds to one CDM group.
- different antenna ports are distinguished by orthogonal cover codes (OCC).
- OCC orthogonal cover codes
- the receiver e.g., network equipment
- OCC frequency domain orthogonal cover codes
- the receiver uses four frequency domain OCC codes [+1, +1, +1, +1], [+1, +1, -1, -1], [+1, -1, +1, -1], and [+1, -1, -1, +1] to distinguish different ports, respectively.
- frequency domain OCC codes [+1, +1, +1, +1], [+1, +1, -1, -1], [+1, -1, +1, -1], and [+1, -1, -1, +1] to distinguish different ports, respectively.
- ports belonging to different CDM groups they can be directly distinguished using frequency domain resources and/or time domain resources.
- Figure 2b is a schematic diagram of a type 2 DMRS provided in an embodiment of this application.
- the DMRS shown on the left in Figure 2b occupies a single OFDM symbol in the time domain, while the DMRS shown on the right in Figure 2b occupies two OFDM symbols in the time domain.
- Type 2 DMRS corresponds to 3 CDM groups. Similar to type 1 DMRS, within the same CDM group, different antenna ports are distinguished by OCC codes. For ports belonging to different CDM groups, they can be directly distinguished by frequency domain resources and/or time domain resources.
- DMRS for PUSCH can include front-loaded (FL) DMRS and additional DMRS.
- PUSCH can carry both front-loaded and additional DMRS.
- the front-loaded DMRS can be used for channel estimation. In some scenarios, if channel estimation using front-loaded DMRS is ineffective, both front-loaded and additional DMRS can be combined to improve the channel estimation performance.
- the port mentioned above refers to the antenna port.
- An antenna port can be understood as a transmitting antenna that is identified by the receiving end, or a spatially distinguishable transmitting antenna.
- An antenna port can be pre-configured for each virtual antenna.
- Each virtual antenna can be a weighted combination of multiple physical antennas, and each antenna port can correspond to a reference signal (RS). Therefore, each antenna port can be called a port of a reference signal.
- each antenna port can be called a DMRS port.
- an antenna port is a logical concept, and there is generally no direct correspondence between an antenna port and a physical antenna.
- An antenna port is typically associated with a reference signal, and its meaning can be understood as a transmit/receive interface on the channel through which the reference signal passes.
- an antenna port may correspond to one or more antenna elements that jointly transmit the reference signal; the receiver can treat them as a whole without distinguishing between individual elements.
- an antenna port may correspond to a beam; similarly, the receiver needs to treat this beam as an interface without distinguishing between individual elements.
- this figure is a schematic diagram of a downlink MU-MIMO scenario provided by an embodiment of this application.
- the network device is the BS and the terminal device is the UE.
- the BS estimates the downlink channel using the sounding reference signal (SRS) sent by the UE and the reciprocity of the uplink and downlink channels. It then performs transmit-end precoding to eliminate inter-user interference.
- SRS sounding reference signal
- the precoding granularity can be used to indicate the range of frequency resources covered by the precoding. See the description below for details.
- the transmitting end can process the signal to be transmitted using a precoding matrix that matches the channel, given the known channel conditions, thus ensuring the precoded signal is compatible with the channel.
- SINR signal-to-interference-plus-noise ratio
- Precoding technology also enables the transmitting end and multiple receivers to transmit on the same time-frequency resources, achieving MU-MIMO.
- the transmitting end can perform precoding at a specific granularity, measured in resource element groups (REGs).
- precoding can include sub-band precoding and full-band precoding.
- Subband precoding refers to precoding at a precoding granularity x, where x is less than the number of resource blocks (RBs) included in the scheduling bandwidth.
- RBs resource blocks
- One RB and one REG each contain 12 REs.
- Full-band precoding performs precoding once according to the number of RBs included in the scheduling bandwidth.
- the sending end can be a network device and the receiving end can be a terminal device; or, the sending end can be a terminal device and the receiving end can be a terminal device.
- MIMO Multiple Input Multiple Output
- y Hx + n
- y the received signal
- H the channel matrix of the MIMO channel
- x the transmitted signal
- n noise.
- precoding is used to reduce system overhead and maximize the system capacity of MIMO, while also reducing the complexity of eliminating inter-channel interference in the receiver.
- P can be selected from a predefined set of matrices (or vectors), called the codebook.
- This method is also known as a codebook-based transmission method. If the sending end can obtain all the information of H, then P can be obtained by the sending end itself. This method is also known as the non-codebook (NCB) sending method.
- NCB non-codebook
- the transmitting end may also perform precoding in other ways. For example, when channel information (e.g., but not limited to the channel matrix) is unknown, a pre-set precoding matrix or a weighted processing method may be used for precoding. For the sake of brevity, the specific details will not be elaborated upon here.
- FIG. 2d is a schematic diagram of an uplink MU-MIMO scenario provided by an embodiment of this application.
- the network device is again the BS (Browser/Server) and the terminal device is the UE (User Equipment).
- the BS Base Station
- the UE User Equipment
- the ports used by each UE to send DMRS can be controlled to maintain good orthogonality.
- the BS can use orthogonal ports to eliminate interference from other UEs.
- FIG. 2e is a schematic diagram of a port corresponding to a DMRS provided in an embodiment of this application.
- the shaded squares correspond to resources used to carry the DMRS, while the unshaded squares are used to carry user data.
- the resources occupied by the DMRS also increase, and correspondingly, the resources used to carry user data decrease, resulting in lower PUSCH resource utilization.
- the time domain orthogonal cover code (TD-OCC) refers to the number of OFDM symbols occupied by the DMRS in the time domain
- the circular shift (CS) refers to the number of frequency domain CDM ports.
- terminal devices can send different signals when sending PUSCH to network devices. For example, they can send cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) signals, or discrete fourier transformation spreading OFDM (DFT-s-OFDM) signals.
- CP-OFDM cyclic prefix orthogonal frequency division multiplexing
- DFT-s-OFDM discrete fourier transformation spreading OFDM
- the DMRS carried by the PUSCH is generated from a gold sequence.
- the DMRS carried by the PUSCH is generated from a ZC (Zadoff-Chu) sequence, or from a gold sequence mapped to a pi/2 binary phase shift keying (BPSK) sequence. Because different sequences are generated using different orthogonal basis functions, frequency-domain CDM and/or time-domain CDM cannot be performed between CP-OFDM signals and DFT-s-OFDM signals.
- orthogonal ports are required between different terminal devices transmitting a certain signal (e.g., CP-OFDM or DFT-s-OFDM).
- a certain signal e.g., CP-OFDM or DFT-s-OFDM.
- DMRS supports 8 quadrature ports for CP-OFDM signals and 8 quadrature ports for DFT-s-OFDM signals.
- the solid-lined area in the attached diagram "(a) Equalization Combination" represents 8 terminal devices. These 8 terminal devices can use the aforementioned 8 quadrature ports supporting CP-OFDM signals to send DMRS to the network device.
- the dashed-lined area in the left-hand attached diagram (a) of Figure 2f also represents 8 terminal devices. These 8 terminal devices can use the aforementioned 8 quadrature ports supporting DFT-s-OFDM to send DMRS to the network device.
- embodiments of this application provide a communication method that enables accurate channel estimation even without the need for the terminal device to transmit DMRS using orthogonal ports. Because the terminal device does not need to use orthogonal ports to transmit DMRS, the resource utilization of the PUSCH can be guaranteed even with an increasing number of users (meaning more PUSCH resources can be used to transmit user data).
- Figure 3 is a flowchart illustrating a communication method provided in an embodiment of this application. The method shown in Figure 3 includes the following steps S101-S104.
- the network device sends a first indication information to the first terminal device.
- the first indication information is used to indicate a first demodulation reference signal and a second demodulation reference signal.
- the second demodulation reference signal is a zero-power demodulation reference signal with zero power.
- the first demodulation reference signal may be a pre-demodulation reference signal.
- the first indication information can be used to indicate both the pre-demodulation reference signal and a zero-power demodulation reference signal with zero power.
- the zero-power demodulation reference signal with zero power can also be understood as a demodulation reference signal with an amplitude of zero.
- the first demodulation reference signal may include a pre-demodulation reference signal and an additional demodulation reference signal.
- the first indication information can be used to indicate the pre-demodulation reference signal, the additional demodulation reference signal, and a zero-power demodulation reference signal with zero power.
- the first indication information indicates the second demodulation reference signal, and may be a pattern indicating the second demodulation reference signal. This embodiment does not specifically limit the manner in which the first indication information indicates the pattern of the second demodulation reference signal; several possible methods are described below.
- the pattern of the second demodulated reference signal can be related to the first signal waveform corresponding to the first PUSCH. Therefore, in one example, the first indication information may include the first signal waveform, which indicates the pattern of the second demodulated reference signal.
- the first indication information includes the first signal waveform; for example, it may include an identifier of the first signal waveform. This application does not specifically limit the first signal waveform; the first signal waveform may be one of CP-OFDM, DFT-s-OFDM, and filter subcarrier quadrature amplitude modulation (Filter SC-QAM).
- the pattern of the second demodulated reference signal can be associated with a first sequence corresponding to the first demodulated reference signal (e.g., a pre-demodulation reference signal). Therefore, in one example, the first indication information may include the first sequence, which indicates the pattern of the second demodulated reference signal.
- the first indication information includes the first sequence, for example, it may include an identifier of the first sequence. This application does not specifically limit the first sequence; the first sequence can be determined according to actual conditions.
- the first sequence may be one of sequences such as ZC sequence, gold sequence, pi/2BPSK sequence, and golay.
- the pattern of the second demodulation reference signal may be related to both the aforementioned first signal waveform and the first sequence.
- the first indication information may include the first signal waveform and the first sequence
- the pattern of the second demodulation reference signal may be indicated by the first signal waveform and the first sequence.
- the pattern index of the second demodulated reference signal can be used to determine the pattern of the second demodulated reference signal. Therefore, in one example, the first indication information includes the pattern index of the second demodulated reference signal, which indicates the pattern of the second demodulated reference signal.
- the pattern index of the second demodulated reference signal may, for example, correspond to a number.
- the first indication information can be used to indicate the time-domain resources occupied by the second demodulated reference signal and/or the frequency-domain resources occupied by the second demodulated reference signal.
- the time-domain resources occupied by the second demodulation reference signal refer to the location of the OFDM symbol occupied by the second demodulation reference signal.
- the location of the OFDM symbol occupied by the second demodulation reference signal can be indicated by the index of the OFDM symbol occupied by the second demodulation reference signal. Therefore, the first indication information may include the index of the OFDM symbol occupied by the second demodulation reference signal, using this index to indicate the location of the OFDM symbol occupied by the second demodulation reference signal.
- the location of the OFDM symbol occupied by the second demodulation reference signal can be determined by the difference between the index of the OFDM symbol occupied by the first demodulation reference signal and the index of the OFDM symbol occupied by the second demodulation reference signal (referred to as the index difference). Therefore, the first indication information may include the index difference, using this index difference to indicate the location of the OFDM symbol occupied by the second demodulation reference signal.
- the first indication information may include the location of the frequency domain resources corresponding to the second demodulation reference signal, so as to indicate the location of the frequency domain resources occupied by the second demodulation reference signal.
- the frequency domain resources corresponding to the second demodulation reference signal can be sparsely mapped onto the scheduling bandwidth.
- This sparse mapping of frequency resources onto the scheduling bandwidth can be understood as uniform mapping of frequency resources onto the scheduling bandwidth.
- the aforementioned first signal waveform is a single-carrier waveform, such as a DFT-s-OFDM signal waveform
- PAPR peak-to-average power ratio
- the frequency domain resources corresponding to the second demodulation reference signal are preferably sparsely mapped onto the scheduling bandwidth.
- the frequency domain resources corresponding to the second demodulation reference signal can be sparsely mapped onto the scheduling bandwidth.
- the frequency domain resources corresponding to the second demodulation reference signal can also occupy at least one resource block on the scheduling bandwidth.
- the frequency domain resources corresponding to the second demodulation reference signal can also occupy at least one resource block on the scheduling bandwidth.
- the location of the frequency resource corresponding to the second demodulation reference signal can include the starting frequency resource location and sparse density of the frequency domain resource corresponding to the second demodulation reference signal. Based on the starting frequency resource location and sparse density, the location of the frequency domain resource corresponding to the second demodulation reference signal can be determined.
- the sparse density can be understood as the ratio of the frequency resource corresponding to the second demodulation reference signal to the frequency resources included in the entire scheduling bandwidth.
- a sparse density of 0.5 indicates that the frequency resource corresponding to the second demodulation reference signal accounts for half of the frequency resources included in the entire scheduling bandwidth; that is, in the frequency resource corresponding to the second demodulation reference signal, any two adjacent frequency resources are separated by one frequency resource.
- the location of the frequency domain resource corresponding to the second demodulation reference signal can be determined to include several frequency domain resources (e.g., resource elements) numbered 0, 2, 4...2n.
- the location of the frequency resource corresponding to the second demodulation reference signal may include the location of the at least one resource block. That is, the location of the frequency domain resource corresponding to the second demodulation reference signal is indicated by indicating the location of the at least one resource block.
- the location of the resource block may include at least two of the following: the start position of the resource block, the end position of the resource block, and the resource block size. For example, for any resource block, the location of the resource block may be the start position and the resource block size.
- the location of the resource block may be the start position and the end position of the resource block.
- the location of the resource block may be the resource block size and the end position.
- the resource block size may, for example, be the number of resource elements included in the resource block.
- the at least one resource block can correspond one-to-one with at least one precoding sub-band precoded by the network device. In this way, after the network device executes S104, when evaluating interference from other terminal devices based on the second demodulation reference, it can estimate the interference from other terminal devices on each precoding sub-band.
- the first demodulation reference signal and the second demodulation reference signal need to have a certain degree of isolation, so that the network device can assess interference from other terminal devices based on the second demodulation reference signal.
- the first demodulation reference signal and the second demodulation reference signal are time-division multiplexed, that is, the first demodulation reference signal and the second demodulation reference signal can occupy different OFDM symbols in the time domain.
- the second demodulation reference signal can occupy one OFDM symbol or multiple OFDM symbols in the time domain; this embodiment does not impose a specific limitation.
- the second demodulation reference signal is a newly introduced demodulation reference signal.
- the resources (time domain resources and frequency domain resources) occupied by the second demodulation reference signal were originally used to carry user data.
- the non-demodulation reference signal carrier positions on the OFDM symbol where the second demodulation reference signal is located are still used to transmit user data, thereby effectively utilizing the resources of the first PUSCH.
- the OFDM symbol where the second demodulation reference signal is located refers to the OFDM symbol occupied by the second demodulation reference signal.
- the OFDM symbol occupied by the second demodulation reference signal can also be described as the OFDM symbol corresponding to the second demodulation reference signal.
- Figure 4a is a schematic diagram of the patterns of the first demodulation reference signal and the second demodulation reference signal provided in an embodiment of this application.
- Figure 4b is a schematic diagram of the patterns of the first demodulation reference signal and the second demodulation reference signal provided in another embodiment of this application.
- the pattern of the pre-demodulation reference signal corresponds to 401 in the figure. In the time domain, it occupies the 3rd and 4th OFDM symbols, and its frequency RBs are numbered 1, 3, 5, ... 2n+1.
- the pattern of the zero-power demodulation reference signal corresponds to 402 in the figure.
- the zero-power demodulation reference signal occupies the first OFDM symbol in the time domain, and it is time-division multiplexed with the pre-demodulation reference signal 401.
- the pattern of the zero-power demodulation reference signal is sparsely mapped on the scheduling bandwidth. Specifically, its frequency RBs are numbered 0, 2, 4, ... 2n.
- the pattern of the pre-demodulation reference signal corresponds to 403 in the figure. In the time domain, it occupies the 3rd and 4th OFDM symbols, and its frequency RBs are numbered 1, 3, 5, ..., 2m+1.
- the pattern of the zero-power demodulation reference signal corresponds to 404 in the figure.
- the zero-power demodulation reference signal occupies the first OFDM symbol in the time domain, and it is time-division multiplexed with the pre-demodulation reference signal 403.
- the pattern of the zero-power demodulation reference signal occupies one resource block on the scheduling bandwidth. The size of this resource block is two frequency domain resource elements.
- the pre-demodulation reference signal and the zero-power demodulation reference signal occupy different OFDM symbols in the time domain.
- the pre-demodulation reference signal occupies two OFDM symbols in the time domain, while the zero-power demodulation reference signal occupies one OFDM symbol in the time domain.
- the aforementioned first indication information may further include the time-domain resources of the first demodulation reference signal, the frequency-domain resources of the first demodulation reference signal, and the port number corresponding to the first demodulation reference signal.
- the time-domain resources of the first demodulation reference signal include at least one of the following parameters: system frame number, transmission timeslot, OFDM symbol start position, and number of time-domain OFDM symbols.
- the network device may indicate the time-domain resources of the first demodulation reference signal through the start and length indicator value (SLIV) fields in the downlink control information (DCI).
- SIV start and length indicator value
- the frequency domain resources of the aforementioned first demodulation reference signal include at least one parameter such as: the number of physical resource blocks (PRBs), bandwidth part (BWP), frequency band, serving cell ID, center frequency, and subcarrier spacing (SCS).
- the network device can indicate the frequency domain resources of the first demodulation reference signal via DCI or radio resource control (RRC) signaling.
- RRC radio resource control
- the pattern of the demodulation reference signal carried by the PUSCH is similar to that carried by the PDSCH, and may also include type 1 and type 2. Therefore, the pattern of the first demodulation reference signal can be seen in Figures 2a and 2b, and it may also be type 1 or type 2.
- the port number corresponding to the first demodulation reference signal can be one of 1000, 1001, 1002 and 1003.
- the port number corresponding to the first demodulation reference signal can be one of 1000, 1001, 1002, 1003, 1004, 1005, 1006 and 1007.
- the port number corresponding to the first demodulation reference signal can be one of 1000, 1001, 1002, 1003, 1004, and 1005.
- the port number corresponding to the first demodulation reference signal can be one of 1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1009, 1010, and 1011.
- the pattern of the first demodulation reference signal preferably corresponds to type 1 to ensure the low PAPR characteristic of the single carrier.
- the network device can send the first indication information to the network device through one or more signaling messages.
- the network device can carry all the information in the aforementioned first indication information through a single signaling message, or it can divide the aforementioned information into several parts, with each part carried through a different signaling message.
- This embodiment of the application does not impose any specific limitations.
- the first terminal device receives the first instruction information sent by the network device.
- the first terminal device sends a first PUSCH to the network device according to the first instruction information.
- the first PUSCH carries the first demodulation reference signal and the second demodulation reference signal.
- the first terminal device can receive the first instruction information sent by the network device. After receiving the first instruction information, the first terminal device can determine the pattern of the first demodulation reference signal and the pattern of the second demodulation reference signal based on the first instruction information, and further generate the first demodulation reference signal and the second demodulation reference signal based on the patterns of the first demodulation reference signal and the second demodulation reference signal, so as to send the first PUSCH to the network device.
- the first terminal device can determine the pattern of the second demodulation reference signal based on a first correspondence between the signal waveform and the pattern, and the first signal waveform.
- the first correspondence mentioned herein can be a correspondence between an identifier of a signal waveform and a pattern identifier (e.g., a pattern index).
- the first correspondence can include multiple correspondences, at least including the correspondence between the first signal waveform and the pattern of the second demodulation reference signal.
- the pattern of the second demodulation reference signal can be determined to be Pattern 1.
- the pattern of the second demodulation reference signal can be determined to be Pattern 2.
- the pattern of the second demodulation reference signal can be determined to be Pattern 3.
- the first terminal device can determine the pattern of the second demodulation reference signal based on a second correspondence between the sequence and the pattern and the first sequence.
- the second correspondence mentioned herein can be a correspondence between a sequence identifier and a pattern identifier (e.g., a pattern index).
- the second correspondence can include multiple correspondences, at least including the correspondence between the first sequence and the pattern of the second demodulation reference signal.
- the pattern of the second demodulation reference signal can be determined to be pattern 1'.
- the pattern of the second demodulation reference signal can be determined to be pattern 2'.
- the pattern of the second demodulation reference signal can be determined to be pattern 3'.
- any pattern in Table 2 (e.g., pattern 1), it may be different from all the patterns shown in Table 3, or it may be the same as a certain pattern shown in Table 3 (e.g., pattern 1').
- This application does not make specific limitations in the embodiments.
- these two sequences can be of the same type, such as a gold sequence, a ZC sequence, a golay sequence, or a pi/2BPSK sequence, but with different specific sequence parameters. These two sequences can also be of different types; for example, one sequence may be a gold sequence and the other a ZC sequence, etc., which will not be listed here.
- the first terminal device can determine the pattern of the second demodulation reference signal based on a third correspondence between the signal waveform, the sequence, and the pattern, and the first signal waveform and the first sequence.
- the third correspondence mentioned here can be a correspondence between the identifier of the signal waveform, the identifier of the sequence, and the identifier of the pattern.
- the third correspondence can include multiple correspondences, at least including the correspondence between the first signal waveform, the first sequence, and the pattern of the second demodulation reference signal.
- the pattern of the second demodulation reference signal can be determined to be pattern 1.
- the pattern of the second demodulation reference signal can be determined to be pattern 2.
- the pattern of the second demodulation reference signal can be determined to be pattern 3.
- pattern 1 For any pattern in Table 2 (e.g., pattern 1), it may be different from all the patterns shown in Table 4, or it may be the same as a certain pattern shown in Table 4 (e.g., pattern 1”). This application embodiment does not make specific limitations.
- any pattern in Table 3 may be different from all the patterns shown in Table 4, or it may be the same as a certain pattern shown in Table 4 (e.g., pattern 1").
- This application embodiment does not make specific limitations.
- the first terminal device can determine the pattern of the first demodulation reference signal based on the port number of the aforementioned first demodulation reference signal.
- the first terminal device can generate the aforementioned first sequence. This sequence is then combined with the pattern of the first demodulation reference signal to generate a first demodulation reference signal. Based on the pattern of the second demodulation reference signal, the zero-power signal is mapped onto the resource indicated by the pattern of the second demodulation reference signal to obtain a second demodulation reference signal. This second demodulation reference signal is then sent to the network device via a first PUSCH carrying both the first and second demodulation reference signals. It should be noted that the first PUSCH carries user data in addition to the first and second demodulation reference signals.
- the embodiments of this application do not specifically limit the specific implementation of the first terminal device generating the first sequence.
- the generation method of the first sequence can, for example, follow traditional technology, and will not be described in detail here.
- the network device receives the first PUSCH sent by the first terminal device.
- the network device After receiving the first PUSCH sent by the first terminal device, the network device can perform channel estimation based on the first demodulation reference signal and the second demodulation reference signal. In a specific example, the network device can estimate interference from other network devices based on the second demodulation reference signal. Specifically, since the second demodulation reference signal is a zero-power demodulation reference signal, the signals received by the network device on the frequency domain resources corresponding to the second demodulation reference signal are all interference from other terminal devices. That is, the network device can evaluate the interference from other terminal devices based on the signals received on the frequency domain resources corresponding to the second demodulation reference signal. This can be understood in conjunction with the following formula (1):
- k represents the frequency domain resource location corresponding to the second demodulation reference signal
- B is a collection of other terminal devices
- r B [k] represents interference from other terminal devices.
- the network device After determining rB [k], the network device can further perform channel estimation based on rB [k] and the first demodulation reference signal. Since interference from other terminal devices has been confirmed during channel estimation, the network device can perform accurate channel estimation. That is, using this scheme, the accuracy of channel estimation can be guaranteed.
- the network device and any terminal device can interact in the manner shown in Figure 3 to perform channel estimation.
- the network device can also send second indication information to the second network device.
- This second indication information indicates a third demodulation reference signal and a fourth demodulation reference signal, where the fourth demodulation reference signal is a zero-power demodulation reference signal with zero power.
- the second terminal device can send a second PUSCH to the network device based on the second indication information. This second PUSCH carries the third and fourth demodulation reference signals.
- the third demodulation reference signal please refer to the previous section describing the first demodulation reference signal.
- the fourth demodulation reference signal please refer to the previous section describing the second demodulation reference signal; it will not be repeated here.
- the second demodulation reference signal indicated by the network device to each first terminal device and the fourth demodulation reference signal indicated by the network device to the second terminal device require different resources.
- the fourth demodulation reference signal and the second demodulation reference signal are time-division multiplexed.
- Figures (a) and (c) in Figure 4c which is a schematic diagram of a zero-power demodulation reference signal provided in an embodiment of this application.
- Figure (a) in Figure 4c shows pattern 405, which can be the pattern corresponding to the second demodulation reference signal. Pattern 405 occupies the first OFDM symbol in the time domain, and its frequency RBs are numbered 0, 2, 4, ... 2p.
- Figure (c) in Figure 4c shows pattern 407, which can be the pattern corresponding to the fourth demodulation reference signal. Pattern 407 occupies the second OFDM symbol in the time domain, and its frequency RBs are numbered 0, 2, 4, ... 2k.
- the fourth demodulation reference signal and the second demodulation reference signal occupy different resource blocks in terms of frequency.
- Figures (a) and (b) in Figure 4c show pattern 405, which can be the pattern corresponding to the second demodulation reference signal.
- Figure (b) in Figure 4c shows pattern 406, which can be the pattern corresponding to the fourth demodulation reference signal.
- Both patterns 405 and 406 occupy the first OFDM symbol in the time domain, but the RB numbers occupied by pattern 405 in terms of frequency are 0, 2, 4, ... 2p, while the RB numbers occupied by pattern 406 in terms of frequency are 1, 3, 5, ... 2p+1.
- the fourth demodulation reference signal and the second demodulation reference signal are not only time-division multiplexed, but also occupy different resource blocks in terms of frequency.
- pattern 406 shown in Figure 4c(b) can be the pattern of the second demodulation reference signal.
- Pattern 407 shown in Figure 4c(c) can be the pattern of the fourth demodulation reference signal.
- the port number used by the first terminal device to transmit the first demodulation reference signal and the port number used by the second terminal device to transmit the third demodulation reference signal can be the same.
- the port used by the first terminal device to transmit the first demodulation reference signal and the port used by the second terminal device to transmit the third demodulation reference signal can be non-orthogonal. That is, using the solution of this application embodiment, by introducing an additional zero-power demodulation reference signal to evaluate interference from other network devices, the ports used by different terminal devices to transmit the pre-demodulation reference signal do not need to be orthogonal.
- this application also provides a corresponding communication device, which will be described below with reference to the accompanying drawings.
- this application embodiment provides a communication device 500, which includes a processing unit 501 and a transceiver unit 502.
- the transceiver unit 502 includes a receiving unit for receiving data and a transmitting unit for sending data.
- the communication device 500 can realize the functions of the terminal device (or network device) in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments.
- the communication device 500 can be a terminal device (or network device), or it can be an integrated circuit or component inside the terminal device (or network device), such as a chip.
- the following embodiments use a terminal device or network device as an example for description.
- the apparatus 500 is used to perform the method executed by the terminal device (e.g., the first terminal device) in the foregoing embodiments.
- the terminal device e.g., the first terminal device
- the receiving unit is configured to receive first indication information, the first indication information being used to indicate a first demodulation reference signal and a second demodulation reference signal, the second demodulation reference signal being a zero-power demodulation reference signal with zero power;
- the transmitting unit is configured to transmit a first physical uplink shared channel (PUSCH) according to the first indication information.
- the first PUSCH carries the first demodulation reference signal and the second demodulation reference signal, which are used for channel estimation.
- the first indication information includes: a first signal waveform corresponding to the first PUSCH and/or a first sequence corresponding to the first demodulation reference signal, wherein the first signal waveform and/or the first sequence are used to determine the pattern of the second demodulation reference signal; the processing unit 501 is used to determine the pattern of the second demodulation reference signal based on the first signal waveform and/or the first sequence before transmitting the first PUSCH.
- the processing unit 501 is configured to:
- the pattern of the second demodulation reference signal is determined, wherein the first correspondence includes at least the correspondence between the first signal waveform and the pattern of the second demodulation reference signal; or,
- the pattern of the second demodulated reference signal is determined, wherein the second correspondence includes at least the correspondence between the first sequence and the pattern of the second demodulated reference signal; or,
- the pattern of the second demodulation reference signal is determined based on the first signal waveform, the first sequence, and the third correspondence between the signal waveform, the sequence, and the pattern.
- the third correspondence includes at least the correspondence between the first signal waveform, the first sequence, and the pattern of the second demodulation reference signal.
- the first indication information includes: a pattern index of the second demodulation reference signal, the pattern index of the second demodulation reference signal being used to determine the pattern of the second demodulation reference signal.
- the first indication information includes: an index of the orthogonal frequency division multiplexing (OFDM) symbol occupied by the second demodulation reference signal; or, an index difference, wherein the index difference is the difference between the index of the OFDM symbol occupied by the first demodulation reference signal and the index of the OFDM symbol occupied by the second demodulation reference signal, and the index of the OFDM symbol or the index difference is used to indicate the pattern of the second demodulation reference signal.
- OFDM orthogonal frequency division multiplexing
- the first indication information includes: the location of the frequency resource corresponding to the second demodulation reference signal, wherein: if the frequency resource corresponding to the second demodulation reference signal is sparsely mapped onto the scheduling bandwidth, the location includes: the starting frequency resource location and the sparse density; or, if the frequency resource corresponding to the second demodulation reference signal occupies at least one resource block on the scheduling bandwidth, the location includes: at least two of the following: the starting position, the ending position, and the resource block size of each resource block in the at least one resource block.
- the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth; or, if the first signal waveform is a multi-carrier waveform, the frequency resources corresponding to the second demodulation reference signal occupy at least one resource block on the scheduling bandwidth, or the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth.
- the at least one resource block corresponds one-to-one with at least one precoded subband that is precoded.
- the first demodulation reference signal includes: a pre-demodulation reference signal, or a pre-demodulation reference signal and an additional demodulation reference signal.
- the first demodulation reference signal and the second demodulation reference signal are time-division multiplexed.
- the non-demodulation reference signal carrier position on the OFDM symbol where the second demodulation reference signal is located is used to transmit user data.
- the device 500 is used to perform the methods executed by the network device in the foregoing embodiments, in which case:
- the transmitting unit is used to transmit first indication information, the first indication information being used to indicate a first demodulation reference signal and a second demodulation reference signal, the second demodulation reference signal being a zero-power demodulation reference signal with zero power;
- the receiving unit is configured to receive a first physical uplink shared channel (PUSCH) sent based on the first indication information.
- the first PUSCH carries the first demodulation reference signal and the second demodulation reference signal, which are used for channel estimation.
- the first indication information includes: a first signal waveform corresponding to the first PUSCH and/or a first sequence corresponding to the first demodulation reference signal, wherein the first signal waveform and/or the first sequence are used to determine the pattern of the second demodulation reference signal.
- the first indication information includes: a pattern index of the second demodulation reference signal, the pattern index of the second demodulation reference signal being used to determine the pattern of the second demodulation reference signal.
- the first indication information includes: an index of the orthogonal frequency division multiplexing (OFDM) symbol occupied by the second demodulation reference signal; or, an index difference, the index difference being the difference between the index of the OFDM symbol occupied by the first demodulation reference signal and the index of the OFDM symbol occupied by the second demodulation reference signal, wherein the index of the OFDM symbol or the index difference is used to indicate the pattern of the second demodulation reference signal.
- OFDM orthogonal frequency division multiplexing
- the first indication information includes: the location of the frequency resource corresponding to the second demodulation reference signal, wherein: if the frequency resource corresponding to the second demodulation reference signal is sparsely mapped onto the scheduling bandwidth, the location includes: the starting frequency resource location and the sparse density; or, if the frequency resource corresponding to the second demodulation reference signal occupies at least one resource block on the scheduling bandwidth, the location includes: at least two of the following: the starting position, the ending position, and the size of each resource block in the at least one resource block.
- the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth; or, if the first signal waveform is a multi-carrier waveform, the frequency resources corresponding to the second demodulation reference signal occupy at least one resource block on the scheduling bandwidth, or the frequency resources corresponding to the second demodulation reference signal are sparsely mapped onto the scheduling bandwidth.
- the at least one resource block corresponds one-to-one with at least one precoded subband that is precoded.
- the first demodulation reference signal includes: a pre-demodulation reference signal, or a pre-demodulation reference signal and an additional demodulation reference signal.
- the first demodulation reference signal and the second demodulation reference signal are time-division multiplexed.
- the non-demodulation reference signal carrier position on the OFDM symbol where the second demodulation reference signal is located is used to transmit user data.
- the transmitting unit is further configured to: transmit second indication information, the second indication information being used to indicate a third demodulation reference signal and a fourth demodulation reference signal, the fourth demodulation reference signal being a zero-power demodulation reference signal with zero power, wherein: the port number used to transmit the third demodulation reference signal is the same as the port number used to transmit the first demodulation reference signal; the receiving unit is further configured to receive a second PUSCH transmitted based on the second indication information, the second PUSCH carrying the third demodulation reference signal and the fourth demodulation reference signal, the third demodulation reference signal and the fourth demodulation reference signal being used for channel estimation; wherein: the fourth demodulation reference signal and the second demodulation reference signal are time-division multiplexed, and/or, the fourth demodulation reference signal and the second demodulation reference signal occupy different resource blocks in terms of frequency.
- the communication device 600 includes a logic circuit 601 and an input/output interface 602.
- the communication device 600 can be a chip or an integrated circuit.
- the communication device 600 can realize the functions of the terminal device (or network device) in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments.
- the communication device 600 can be a terminal device (or network device), or it can be an integrated circuit or component inside the terminal device (or network device), such as a chip.
- the following embodiments use a terminal device or network device as an example for description.
- the transceiver unit 502 can be a communication interface, which can be the input/output interface 602 in Figure 6, and the input/output interface 602 can include an input interface and an output interface.
- the communication interface can also be a transceiver circuit, which can include an input interface circuit and an output interface circuit.
- the input/output interface 602 is used to receive first indication information, the first indication information being used to indicate a first demodulation reference signal and a second demodulation reference signal, the second demodulation reference signal being a zero-power demodulation reference signal with zero power; according to the first indication information, a first physical uplink shared channel (PUSCH) is transmitted, the first PUSCH carrying the first demodulation reference signal and the second demodulation reference signal, the first demodulation reference signal and the second demodulation reference signal being used for channel estimation; in one example, the logic circuit 601 is used to determine the pattern of the second demodulation reference signal based on the first signal waveform and/or the first sequence before transmitting the first PUSCH.
- PUSCH physical uplink shared channel
- the logic circuit 601 and the input/output interface 602 can also perform other steps executed by the terminal device in the aforementioned embodiments and achieve corresponding beneficial effects, which will not be elaborated here.
- the input/output interface 602 is used to send first indication information, the first indication information being used to indicate a first demodulation reference signal and a second demodulation reference signal, the second demodulation reference signal being a zero-power demodulation reference signal with zero power; and to receive a first Physical Uplink Shared Channel (PUSCH) sent based on the first indication information, the first PUSCH carrying the first demodulation reference signal and the second demodulation reference signal, the first demodulation reference signal and the second demodulation reference signal being used for channel estimation.
- the logic circuit 601 is used to perform channel estimation based on the first demodulation reference signal and the second demodulation reference signal.
- the logic circuit 601 and the input/output interface 602 can also perform other steps executed by the network device in the aforementioned embodiments and achieve corresponding beneficial effects, which will not be elaborated here.
- the processing unit 501 shown in FIG5 can be the logic circuit 601 in FIG6.
- the logic circuit 601 can be a processing device, the functions of which can be partially or entirely implemented in software.
- the processing apparatus may include a memory and a processor, wherein the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform the corresponding processing and/or steps in any of the method embodiments.
- the processing device may consist of only a processor.
- a memory for storing computer programs is located outside the processing device, and the processor is connected to the memory via circuitry/wires to read and execute the computer programs stored in the memory.
- the memory and processor may be integrated together or physically independent of each other.
- the processing device may be one or more chips, or one or more integrated circuits.
- the processing device may be one or more field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), system-on-chips (SoCs), central processing units (CPUs), network processors (NPs), digital signal processors (DSPs), microcontroller units (MCUs), programmable logic devices (PLDs), or other integrated chips, or any combination of the above chips or processors.
- FPGAs field-programmable gate arrays
- ASICs application-specific integrated circuits
- SoCs system-on-chips
- CPUs central processing units
- NPs network processors
- DSPs digital signal processors
- MCUs microcontroller units
- PLDs programmable logic devices
- the communication device 700 may include, but is not limited to, at least one processor 701 and a communication port 702.
- the device may also include at least one of a memory 703 and a bus 704.
- the at least one processor 701 is used to control the operation of the communication device 700.
- the processor 701 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application.
- the processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, etc.
- the communication device 700 can implement the functions of the terminal device (or network device) in the above method embodiments.
- the communication device 700 can be a terminal device (or network device), or it can be an integrated circuit or component inside the terminal device (or network device), such as a chip.
- the specific implementation of the communication device shown in FIG7 can be referred to the description in the foregoing method embodiments, and will not be repeated here.
- Figure 8 is a schematic diagram of the structure of the communication device 800 involved in the above embodiments provided in this application.
- the communication device 800 can realize the functions of the terminal device (or network device) in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments.
- the communication device 800 can be a terminal device (or network device), or it can be an integrated circuit or component inside the terminal device (or network device), such as a chip.
- the communication device 800 includes at least one processor 811 and at least one network interface 814.
- the communication device further includes at least one memory 812, at least one transceiver 813, and one or more antennas 815.
- the processor 811, memory 812, transceiver 813, and network interface 814 are connected, for example, via a bus. In this embodiment, the connection may include various interfaces, transmission lines, or buses, etc., and this embodiment is not limited thereto.
- the antenna 815 is connected to the transceiver 813.
- the network interface 814 enables the communication device to communicate with other communication devices through a communication link.
- the network interface 814 may include a network interface between the communication device and core network equipment, such as an S1 interface, or a network interface between the communication device and other communication devices (e.g., other network devices or core network equipment), such as an X2 or Xn interface.
- core network equipment such as an S1 interface
- other communication devices e.g., other network devices or core network equipment
- the processor 811 is primarily used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data from these programs, for example, to support the actions described in the embodiments of the communication device.
- the communication device may include a baseband processor and a central processing unit (CPU).
- the baseband processor is primarily used to process communication protocols and communication data, while the CPU is primarily used to control the entire terminal device, execute software programs, and process data from these programs.
- the processor 811 in Figure 8 can integrate the functions of both a baseband processor and a CPU. Those skilled in the art will understand that the baseband processor and CPU can also be independent processors interconnected via technologies such as buses.
- a terminal device may include multiple baseband processors to adapt to different network standards, and multiple CPUs to enhance its processing capabilities.
- the various components of the terminal device can be connected via various buses.
- the baseband processor can also be described as a baseband processing circuit or a baseband processing chip.
- the CPU can also be described as a central processing circuit or a central processing chip.
- the function of processing communication protocols and communication data can be built into the processor or stored in memory as a software program, which is then executed by the processor to implement the baseband processing function.
- the memory is primarily used to store software programs and data.
- the memory 812 can exist independently or be connected to the processor 811.
- the memory 812 can be integrated with the processor 811, for example, integrated into a single chip.
- the memory 812 can store program code that executes the technical solutions of the embodiments of this application, and its execution is controlled by the processor 811.
- the various types of computer program code being executed can also be considered as drivers for the processor 811.
- Figure 8 shows only one memory and one processor. In actual terminal devices, there may be multiple processors and multiple memories. Memory can also be called storage medium or storage device, etc. Memory can be a storage element on the same chip as the processor, i.e., an on-chip storage element, or it can be a separate storage element; this application does not limit this.
- Transceiver 813 can be used to support the reception or transmission of radio frequency (RF) signals between a communication device and a terminal.
- Transceiver 813 can be connected to antenna 815.
- Transceiver 813 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 815 can receive RF signals.
- the receiver Rx of transceiver 813 receives the RF signals from the antennas, converts the RF signals into digital baseband signals or digital intermediate frequency (IF) signals, and provides the digital baseband signals or IF signals to processor 811 so that processor 811 can perform further processing on the digital baseband signals or IF signals, such as demodulation and decoding.
- IF intermediate frequency
- the transmitter Tx in transceiver 813 is also used to receive modulated digital baseband signals or IF signals from processor 811, convert the modulated digital baseband signals or IF signals into RF signals, and transmit the RF signals through one or more antennas 815.
- the receiver Rx can selectively perform one or more stages of downmixing and analog-to-digital conversion on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency (IF) signal.
- IF digital intermediate frequency
- the order of these downmixing and IF conversion processes is adjustable.
- the transmitter Tx can selectively perform one or more stages of upmixing and digital-to-analog conversion on the modulated digital baseband signal or digital IF signal to obtain a radio frequency signal.
- the order of these upmixing and IF conversion processes is also adjustable.
- the digital baseband signal and the digital IF signal can be collectively referred to as digital signals.
- the transceiver 813 can also be called a transceiver unit, transceiver, transceiver device, etc.
- the device in the transceiver unit that performs the receiving function can be regarded as the receiving unit
- the device in the transceiver unit that performs the transmitting function can be regarded as the transmitting unit. That is, the transceiver unit includes a receiving unit and a transmitting unit.
- the receiving unit can also be called a receiver, input port, receiving circuit, etc.
- the transmitting unit can be called a transmitter, transmitter, or transmitting circuit, etc.
- the communication device 800 shown in Figure 8 can be used to implement the steps implemented by the terminal device (or network device) in the aforementioned method embodiments, and to achieve the technical effects corresponding to the network device.
- the specific implementation of the communication device 800 shown in Figure 8 can be referred to the description in the aforementioned method embodiments, and will not be repeated here.
- This application also provides a computer-readable storage medium for storing one or more computer-executable instructions.
- the processor When the computer-executable instructions are executed by a processor, the processor performs the method described in the possible implementation of the communication device (e.g., a first terminal device or a network device) as described in the foregoing embodiments.
- This application also provides a computer program product (or computer program) that, when executed by a processor, allows the processor to execute a method that may implement the aforementioned communication device (e.g., a first terminal device or network device).
- This application also provides a chip system including at least one processor for supporting a communication device in implementing the functions involved in the possible implementations of the communication device described above.
- the chip system further includes an interface circuit that provides program instructions and/or data to the at least one processor.
- the chip system may also include a memory for storing the program instructions and data necessary for the communication device.
- the chip system may be composed of chips or may include chips and other discrete devices, wherein the communication device may specifically be a terminal device or a network device as described in the foregoing method embodiments.
- This application also provides a communication system, the network system architecture of which includes terminal devices (e.g., a first terminal device and/or a second terminal device) and network devices as described in any of the above embodiments.
- terminal devices e.g., a first terminal device and/or a second terminal device
- network devices as described in any of the above embodiments.
- the disclosed systems, apparatuses, and methods can be implemented in other ways.
- the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods.
- multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.
- the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.
- the units described as separate components may or may not be physically separate.
- the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
- the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
- the integrated unit can be implemented in hardware or as a software functional unit. If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
- This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.
- the aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
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Abstract
一种通信方法,应用于第一通信装置。第一通信装置可以接收第一指示信息,该第一指示信息用于指示第一解调参考信号和第二解调参考信号,第二解调参考信号为功率为0的零功率解调参考信号。接收第一指示信息之后,可以根据该第一指示信息,向第二通信装置发送第一PUSCH,第一PUSCH承载前述第一解调参考信号和第二解调参考信号,该第一解调参考信号和第二解调参考信号用于进行信道估计。在本申请中,第一通信装置发送的第一PUSCH除了承载第一解调参考信号之外,还承载了额外的功率为0的第二解调参考信号,从而使得第二通信装置能够结合该第二PUSCH估计来自其它设备的PUSCH的干扰,从而提升第二设备进行信道估计的精度。
Description
本申请要求于2024年5月31日提交国家知识产权局、申请号为2024107085697、发明名称为“一种通信方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及无线技术领域,尤其涉及一种通信方法及装置。
设备之间进行通信之前,可以先进行信道估计,以便于基于信道估计的结果进行通信。在一个示例中,设备A可以向设备B发送解调参考信号(demodulation reference signal,DMRS),相应的,设备B可以通过设备A发送的DMRS进行信道估计。在多输入多输出(multi-input multi-output,MIMO)技术中,前述设备A可以是终端设备,设备B可以是网络设备。其中,MIMO技术是无线通信的一项关键技术,可以用来满足高速率的传输需求。
在一些场景中,会存在多个设备A均向设备B发送DMRS的情况,相应的,设备B可以根据各个设备A发送的DMRS,分别对自身与各设备A之间的信道进行估计。例如,在多用户MIMO(multi-user,MU-MIMO)场景中,多个终端设备可以分别向网络设备发送DMRS,相应的,网络设备基于各个终端设备发送的DMRS分别对自身与各个终端之间的信道进行估计。
由于多个设备A发送的DMRS之间会互相干扰,从而导致设备B无法准确的对自身与各个设备A之间的信道进行估计。因此,亟需一种方案,能够解决上述问题。
本申请实施例提供了一种通信方法,能够提升信道估计的精度。
第一方面,本申请提供了一种通信方法,该方法例如可以应用于第一通信装置,第一通信装置为终端或终端中的组件(或称装置)。其中,本申请中的组件例如可包括芯片、芯片系统、处理器、收发器、处理单元、电路、功能模块、或收发单元中的至少一种。第一通信装置可以接收第一指示信息,该第一指示信息用于指示第一解调参考信号和第二解调参考信号,其中,第二解调参考信号为功率为0的零功率解调参考信号。接收所述第一指示信息之后,可以根据该第一指示信息,向第二通信装置发送第一物理上行共享信道(physical uplink shared channel,PUSCH),所述第一PUSCH承载前述第一解调参考信号和第二解调参考信号,该第一解调参考信号和第二解调参考信号用于进行信道估计。在本申请实施例中,第一通信装置发送的第一PUSCH除了承载第一解调参考信号之外,还承载了额外的功率为0的第二解调参考信号,从而使得第二通信装置能够结合该第二PUSCH估计来自其它设备的PUSCH的干扰,从而提升第二通信装置进行信道估计的精度。
在一种可能的实现方式中,第二解调参考信号的图案可以与第一PUSCH对应的第一信号波形相关,因此,在一个示例中,所述第一指示信息可以包括所述第一信号波形,通过所述第一信号波形来指示所述第二解调参考信号的图案。
在一种可能的实现方式中,若所述第一指示信息包括第一信号波形,该第一信号波形用于指示第二解调参考信号的图案,则所述第一通信装置可以基于信号波形和图案之间的第一对应关系和所述第一信号波形,确定所述第二解调参考信号的图案。此处提及的第一对应关系,可以是信号波形的标识和图案标识(例如图案索引)之间的对应关系。第一对应关系可以包括多个对应关系,该多个对应关系,至少包括所述第一信号波形和所述第二解调参考信号的图案之间的对应关系。
在一种可能的实现方式中,第二解调参考信号的图案可以与第一解调参考信号(例如前置解调参考信号)对应的第一序列相关。因此,在一个示例中,所述第一指示信息可以包括所述第一序列,通过所述第一序列来指示所述第二解调参考信号的图案。
在一种可能的实现方式中,若所述第一指示信息包括第一序列,该第一序列用于指示第二解调参考信号的图案,则所述第一通信装置可以基于序列和图案之间的第二对应关系和所述第一序列,确定所述第二解调参考信号的图案。此处提及的第二对应关系,可以是序列的标识和图案标识(例如图案索引)之间的对应关系。第二对应关系可以包括多个对应关系,该多个对应关系,至少包括所述第一序列和所述第二解调参考信号的图案之间的对应关系。
在一种可能的实现方式中,所述第二解调参考信号的图案可以与前述第一信号波形和第一序列均相关,对于这种情况,所述第一指示信息可以包括所述第一信号波形和第一序列,通过所述第一信号波形和所述第一序列来指示所述第二解调参考信号的图案。
在一种可能的实现方式中,若所述第一指示信息包括第一信号波形和第一序列,该第一信号波形和第一序列用于指示第二解调参考信号的图案,则所述第一通信装置可以基于信号波形、序列和图案三者之间的第三对应关系、以及所述第一信号波形和所述第一序列,确定所述第二解调参考信号的图案。此处提及的第三对应关系,可以是信号波形的标识、序列的标识和图案标识三者之间的对应关系。第三对应关系可以包括多个对应关系,该多个对应关系,至少包括所述第一信号波形、第一序列和所述第二解调参考信号的图案三者之间的对应关系。
在一种可能的实现方式中,考虑到第二解调参考信号的图案索引,能够用于确定所述第二解调参考信号的图案。因此,在一个示例中,所述第一指示信息包括所述第二解调参考信号的图案索引,通过该图案索引来指示所述第二解调参考信号的图案。
在一种可能的实现方式中,考虑到第二解调参考信号的图案包括其占用的时域资源和频域资源两个维度的信息。作为一个示例,可以通过所述第一指示信息来指示所述第二解调参考信号占用的时域资源。作为一个示例,第二解调参考信号所占用的时域资源,可以通过第二解调参考信号占用的正交频分复用(orthogonal frequency division multiplexing,OFDM)符号的索引来指示。因此,所述第一指示信息可以包括所述第二解调参考信号占用的OFDM符号的索引,通过该第二解调参考信号占用的OFDM符号的索引,来指示所述第二解调参考信号占用的OFDM符号的位置。作为又一个示例,第二解调参考信号所占用的OFDM符号的位置,可以通过所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值(简称索引差值)来确定。因此,因此,所述第一指示信息可以包括所述索引差值,通过该索引差值,来指示所述第二解调参考信号占用的OFDM符号的位置。
在一种可能的实现方式中,可以通过所述第一指示信息来指示所述第二解调参考信号占用的频域资源。其中:若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则所述位置可以包括起始频率资源位置和疏分密度;若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则所述位置包括:所述至少一个资源块中每个资源块的起始位置、结束位置以及资源块大小中的至少两项。
在一种可能的实现方式中,若所述第一信号波形为单载波波形,则所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,以保持低载波波形的低峰值平均功率比。若所述第一信号波形为多载波波形,则所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,或者,所述第二解调参考信号对应的频率资源疏分映射在调度带宽上。
在一种可能的实现方式中,若前述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则在一个示例中,所述至少一个资源块可以与网络设备进行预编码的至少一个预编码子带一一对应,这样一来,第二通信装置在基于第二解调参考进行来评估来自其它终端设备的干扰时,能够在每个预编码子带上都能估计来自其它终端设备的干扰。
在一种可能的实现方式中,所述第一解调参考信号,包括:前置解调参考信号,或者,前置解调参考信号以及附加解调参考信号。也就是说,利用本方案,在进行信道估计时,除了利用前置解调参考信号和附加解调参考信号之外,还引入了零功率解调参考信号,从而有效提升了信号估计的精度。
在一种可能的实现方式中,第一解调参考信号和第二解调参考信号需要有一定的隔离度,从而使得网络设备能够基于第二解调参考信号来评估来自其它终端设备的干扰。在一个具体的示例中,所述第一解调参考信号和所述第二解调参考信号是时分的。
在一种可能的实现方式中,所述第二解调参考信号所在的OFDM符号上的非解调参考信号载波位置,用于传递用户数据,从而有效利用第一PUSCH的资源。
第二方面,本申请提供了一种通信方法,该方法例如可以应用于第二通信装置。第二通信装置为网络设备或者网络设备中的组件(或称装置)。第二通信装置可以向第一通信装置发送第一指示信息,该第一指示信息用于指示第一解调参考信号和第二解调参考信号,其中,第二解调参考信号为功率为0的零功率解调参考信号。其中,第一通信装置可以为终端或终端中的组件。进一步地,第二通信装置接收第一通信装置根据该第一指示信息发送的第一PUSCH,所述第一PUSCH承载前述第一解调参考信号和第二解调参考信号,该第一解调参考信号和第二解调参考信号用于进行信道估计。在本申请实施例中,第一通信装置发送的第一PUSCH除了承载第一解调参考信号之外,还承载了额外的功率为0的第二解调参考信号,从而使得第二通信装置能够结合该第二PUSCH估计来自其它终端设备的PUSCH的干扰,从而提升第二通信装置进行信道估计的精度。
在一种可能的实现方式中,所述第一指示信息包括:所述第一PUSCH对应的第一信号波形和/或所述第一解调参考信号对应的第一序列,所述第一信号波形和/或所述第一序列,用于确定所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号的图案索引,所述第二解调参考信号的图案索引用于确定所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息,包括:所述第二解调参考信号所占用的正交频分复用OFDM符号的索引;或者,索引差值,所述索引差值为所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值,所述OFDM符号的索引或者所述索引差值用于指示所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号对应的频率资源的位置,其中:若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则所述位置包括:起始频率资源位置和疏分密度;或者,若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则所述位置包括:所述至少一个资源块中每个资源块的起始位置、结束位置以及资源块的大小中的至少两项。
在一种可能的实现方式中,若所述第一信号波形为单载波波形,则所述第二解调参考信号对应的频率资源疏分映射在调度带宽上;或者,若所述第一信号波形为多载波波形,则所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,或者,所述第二解调参考信号对应的频率资源疏分映射在调度带宽上。
在一种可能的实现方式中,所述至少一个资源块与进行预编码的至少一个预编码子带一一对应。
在一种可能的实现方式中,所述第一解调参考信号,包括:前置解调参考信号,或者,前置解调参考信号以及附加解调参考信号。
在一种可能的实现方式中,所述第一解调参考信号和所述第二解调参考信号是时分的。
在一种可能的实现方式中,所述第二解调参考信号所在的OFDM符号上的非解调参考信号载波位置,用于传递用户数据。
在一种可能的实现方式中,第二通信装置还可以向第三通信装置发送第二指示信息,所述第二指示信息用于指示第三解调参考信号和第四解调参考信号,所述第四解调参考信号为功率为0的零功率解调参考信号,其中:用于发送所述第三解调参考信号的端口号和用于发送所述第一解调参考信号的端口号相同;进一步地,接收第三通信装置基于所述第二指示信息发送的第二PUSCH,所述第二PUSCH承载所述第三解调参考信号和所述第四解调参考信号,所述第三解调参考信号和所述第四解调参考信号用于进行信道估计;其中,第三通信装置也为终端或终端中的组件(或称装置)。第一通信装置和第三通信装置对应不同的终端设备。为了准确的对网络设备和各终端设备之间的信道进行估计,第二通信装置向第一通信装置所指示的第二解调参考信号,与第二通信装置向第三通信装置所指示的第四解调参考信号,需占用不同的资源。作为一个示例,所述第四解调参考信号和所述第二解调参考信号是时分的,和/或,所述第四解调参考信号和所述第二解调参考信号在频率上占用不同的资源块。
第三方面,本申请提供了一种通信装置,应用于以上第一方面所述的第一通信装置,所述装置包括:接收单元,用于接收第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号;发送单元,用于根据所述第一指示信息,发送第一物理上行共享信道PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号,所述第一解调参考信号和所述第二解调参考信号用于进行信道估计。
在一种可能的实现方式中,所述第一指示信息包括:所述第一PUSCH对应的第一信号波形和/或所述第一解调参考信号对应的第一序列,所述第一信号波形和/或所述第一序列,用于确定所述第二解调参考信号的图案;所述装置还包括:处理单元,用于在发送所述第一PUSCH之前,根据所述第一信号波形和/或所述第一序列,确定所述第二解调参考信号的图案。
在一种可能的实现方式中,所述处理单元,用于:根据所述第一信号波形、以及信号波形和图案之间的第一对应关系,确定所述第二解调参考信号的图案,所述第一对应关系至少包括所述第一信号波形和所述第二解调参考信号的图案之间的对应关系;或者,根据所述第一序列、以及序列和图案之间的第二对应关系,确定所述第二解调参考信号的图案,所述第二对应关系至少包括所述第一序列和所述第二解调参考信号的图案之间的对应关系;或者,根据所述第一信号波形、所述第一序列、以及信号波形、序列和图案三者之间的第三对应关系,确定所述第二解调参考信号的图案,所述第三对应关系至少包括所述第一信号波形、所述第一序列和所述第二解调参考信号的图案之间的对应关系。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号的图案索引,所述第二解调参考信号的图案索引用于确定所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号所占用的正交频分复用OFDM符号的索引;或者,索引差值,所述索引差值为所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值,所述OFDM符号的索引或者所述索引差值用于指示所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号对应的频率资源的位置,其中:若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则所述位置包括:起始频率资源位置和疏分密度;或者,若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则所述位置包括:所述至少一个资源块中每个资源块的起始位置、结束位置以及资源块大小中的至少两项。
在一种可能的实现方式中,若所述第一信号波形为单载波波形,则所述第二解调参考信号对应的频率资源疏分映射在调度带宽上;或者,若所述第一信号波形为多载波波形,则所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,或者,所述第二解调参考信号对应的频率资源疏分映射在调度带宽上。
在一种可能的实现方式中,所述至少一个资源块与进行预编码的至少一个预编码子带一一对应。
在一种可能的实现方式中,所述第一解调参考信号,包括:前置解调参考信号,或者,前置解调参考信号以及附加解调参考信号。
在一种可能的实现方式中,所述第一解调参考信号和所述第二解调参考信号是时分的。
在一种可能的实现方式中,所述第二解调参考信号所在的OFDM符号上的非解调参考信号载波位置,用于传递用户数据。
第四方面,本申请实施例提供了一种通信装置,应用于以上第二方面所述的第二通信装置,所述装置包括:发送单元,用于发送第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号;接收单元,用于接收基于所述第一指示信息发送的第一物理上行共享信道PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号,所述第一解调参考信号和所述第二解调参考信号用于进行信道估计。
在一种可能的实现方式中,所述第一指示信息包括:所述第一PUSCH对应的第一信号波形和/或所述第一解调参考信号对应的第一序列,所述第一信号波形和/或所述第一序列,用于确定所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号的图案索引,所述第二解调参考信号的图案索引用于确定所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息,包括:所述第二解调参考信号所占用的正交频分复用OFDM符号的索引;或者,索引差值,所述索引差值为所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值,所述OFDM符号的索引或者所述索引差值用于指示所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号对应的频率资源的位置,其中:若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则所述位置包括:起始频率资源位置和疏分密度;或者,若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则所述位置包括:所述至少一个资源块中每个资源块的起始位置、结束位置以及资源块的大小中的至少两项。
在一种可能的实现方式中,若所述第一信号波形为单载波波形,则所述第二解调参考信号对应的频率资源疏分映射在调度带宽上;或者,若所述第一信号波形为多载波波形,则所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,或者,所述第二解调参考信号对应的频率资源疏分映射在调度带宽上。
在一种可能的实现方式中,所述至少一个资源块与进行预编码的至少一个预编码子带一一对应。
在一种可能的实现方式中,所述第一解调参考信号,包括:前置解调参考信号,或者,前置解调参考信号以及附加解调参考信号。
在一种可能的实现方式中,所述第一解调参考信号和所述第二解调参考信号是时分的。
在一种可能的实现方式中,所述第二解调参考信号所在的OFDM符号上的非解调参考信号载波位置,用于传递用户数据。
在一种可能的实现方式中,所述发送单元,还用于:发送第二指示信息,所述第二指示信息用于指示第三解调参考信号和第四解调参考信号,所述第四解调参考信号为功率为0的零功率解调参考信号,其中:用于发送所述第三解调参考信号的端口号和用于发送所述第一解调参考信号的端口号相同;所述接收单元,还用于接收基于所述第二指示信息发送的第二PUSCH,所述第二PUSCH承载所述第三解调参考信号和所述第四解调参考信号,所述第三解调参考信号和所述第四解调参考信号用于进行信道估计;其中:所述第四解调参考信号和所述第二解调参考信号是时分的,和/或,所述第四解调参考信号和所述第二解调参考信号在频率上占用不同的资源块。
第五方面,本申请提供了一种通信装置,包括至少一个处理器,该至少一个处理器与存储器耦合。
在一个示例中,该处理器用于执行实现前述第一方面或第一方面任意一种可能的实现方式所述的方法。例如,该存储器用于存储程序或指令;该至少一个处理器用于执行该程序或指令,以使该装置实现前述第一方面或第一方面任意一种可能的实现方式所述的方法。
在又一个示例中,该处理器用于执行实现前述第二方面或第二方面任意一种可能的实现方式所述的方法。例如,该存储器用于存储程序或指令;该至少一个处理器用于执行该程序或指令,以使该装置实现前述第二方面或第二方面任意一种可能的实现方式所述的方法。
第六方面,本申请提供了一种通信装置,包括至少一个逻辑电路和输入输出接口。
在一个示例中,该逻辑电路用于执行如前述第一方面及其任意一种可能的实现方式所述的方法。
在又一个示例中,该逻辑电路用于执行如前述第二方面及其任意一种可能的实现方式所述的方法。
第七方面,本申请提供一种计算机可读存储介质,该计算机可读存储介质用于存储一个或多个计算机执行指令,当计算机执行指令被处理器执行时,该处理器执行如上述第一方面至第二方面的任一方面中的任意一种可能的实现方式所述的方法。
第八方面,本申请提供了一种计算机程序产品(或称计算机程序),当计算机程序产品被该处理器执行时,该处理器执行上述第一方面至第二方面的任一方面中的任意一种可能实现方式的方法。
第九方面,本申请提供了一种芯片系统,该芯片系统包括至少一个处理器,用于支持通信装置实现上述第一方面至第二方面的任一方面中的任意一种可能的实现方式中所涉及的功能。
在一种可能的设计中,该芯片系统还可以包括存储器,存储器,用于保存该通信装置必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包含芯片和其他分立器件。可选的,该芯片系统还包括接口电路,该接口电路为该至少一个处理器提供程序指令和/或数据。
第十方面,本申请提供了一种通信系统,该通信系统包括:执行以上第一方面以及第一方面任意一项所述的方法的第一设备,以及执行以上第二方面以及第二方面任意一项所述的方法的第二设备。
其中,第三方面至第十方面中任一种设计方式所带来的技术效果可参见上述第一方面至第二方面及其不同设计方式所带来的技术效果,在此不再赘述。
图1a为本申请实施例提供的一种示例性应用场景示意图;
图1b为本申请的实施例应用的通信系统1000的架构示意图;
图2a为本申请实施例提供的一种type1的DMRS的图案示意图;
图2b为本申请实施例提供的一种type2的DMRS的图案示意图;
图2c为本申请实施例提供的一种下行MU-MIMO场景的示意图;
图2d为本申请实施例提供的一种上行MU-MIMO场景的示意图;
图2e为本申请实施例提供的一种DMRS对应的端口示意图;
图2f为本申请实施例提供的一种DMRS支持的正交端口的布局示意图;
图3为本申请实施例提供的一种通信方法的流程示意图;
图4a为本申请实施例提供的一种第一解调参考信号和第二解调参考信号的图案的示意图;
图4b为本申请实施例提供的又一种第一解调参考信号和第二解调参考信号的图案的示意图;
图4c为本申请实施例提供的零功率解调参考信号的示意图;
图5为本申请实施例提供的一种通信装置的结构示意图;
图6为本申请实施例提供的另一种通信装置的结构示意图;
图7为本申请实施例提供的又一种通信装置的结构示意图;
图8为本申请实施例提供的另一种通信装置的结构示意图。
本申请实施例提供了一种通信方法,能够提升信道估计的精度。
在介绍本申请实施例提供的方案之前,首先对本申请实施例的应用场景进行介绍。
参见图1a,该图为本申请实施例提供的一种示例性应用场景示意图,图1a所示的场景中包括:网络设备和终端设备。需要说明的是,虽然图1a示出的场景中是网络设备和终端设备通信,但是本申请的方案,也可以适用于终端设备与终端设备通信的场景。即:图1a所示的网络设备,也可以换成终端设备。在本申请的以下示例中,以网络设备和终端设备通信为例进行说明。
如图1a所示的,终端设备可以向网络设备发送PUSCH,网络设备基于该PUSCH中成长的DMRS进行信道估计。
本申请实施例中,网络设备是一种部署在无线接入网(radio access network,RAN)中为终端设备提供无线通信功能的装置。网络设备可以包括各种形式的宏基站,微基站(也称为小站),中继站,接入点等。在采用不同的无线接入技术的场景中,网络设备的名称可能会有所不同,例如:
在全球移动通信系统(global system for mobile communication,GSM)或者码分多址(code division multiple access,CDMA)网络中,网络设备可以是基站收发信台(base transceiver station,BTS)。
在宽带码分多址(wideband code division multiple access,WCDMA)网络中,网络设备可以是节点中的基站(base station,BS)。
在长期演进(long term evolution,LTE)网络中,网络设备可以是演进型基站(evolved NodeB,eNodeB)。
在云无线接入网络(cloud radio access network,CRAN)中,网络设备可以是无线控制器。
网络设备还可以是第五代移动通信技术(5th-generation mobile communication technology,5G)网络或者未来通信系统中的基站设备或者未来演进的公共陆地移动网(public land mobile network,PLMN)网络中的网络设备。网络设备还可以是可穿戴设备或车载设备。网络设备还可以是传输接收节点(transmission and reception point,TRP)。
在一些场景中,网络设备可以理解为网络侧所有设备(包括站点)的统称,例如多个站点可以统称为网络设备。站点是指具体位于一个物理位置的一个传输节点。换句话说,网络设备可以包括站点。
本申请实施例中,所涉及到的终端设备可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备。终端可以是移动站(mobile station,MS)、用户单元(subscriber unit)、蜂窝电话(cellular phone)、智能电话(smart phone)、无线数据卡、个人数字助理(personal digital assistant,PDA)电脑、平板型电脑、无线调制解调器(modem)、手持设备(handset)、膝上型电脑(laptop computer)、机器类型通信(machine type communication,MTC)终端等。
关于前述无线接入网,可以参考图1a所示的通信系统进行理解。图1b为本申请的实施例应用的通信系统1000的架构示意图。如图1b所示,该通信系统1000包括RAN 100和核心网200,可选的,通信系统1000还可以包括互联网300。其中,RAN100包括至少一个RAN节点(如图1b中的110a和110b,统称为110,前述网络设备可以对应RAN节点),还可以包括至少一个终端(如图1b中的120a-120j,统称为120)。RAN100还可以包括其它RAN节点,例如,无线中继设备和/或无线回传设备(图1b中未示出)。终端120通过无线的方式与RAN节点110相连,RAN节点110通过无线或有线方式与核心网200连接。核心网200中的核心网设备与RAN100中的RAN节点110可以是独立的不同的物理设备,也可以是集成了核心网设备的逻辑功能与RAN节点的逻辑功能的同一个物理设备。终端和终端之间以及RAN节点和RAN节点之间可以通过有线或无线的方式相互连接。
RAN100可以是第三代合作伙伴计划(3rd generation partnership project,3GPP)中定义的演进的通用陆地无线接入(evolved universal terrestrial radio access,E-UTRA)系统、新无线(new radio,NR)系统以及未来的无线接入系统。RAN100还可以包括上述两种或两种以上不同的无线接入系统。RAN100还可以是开放式RAN(open RAN,O-RAN)。
RAN节点,也称为无线接入网设备、RAN实体或接入节点,用以帮助终端通过无线方式接入到通信系统中。在一种应用场景中,RAN节点可以是基站、演进型基站、传输接收点(transmission reception point,TRP)、第五代(5th generation,5G)移动通信系统中的下一代基站(next generation NodeB,gNB)、第六代(6th generation,6G)移动通信系统中的下一代基站或未来移动通信系统中的基站。RAN节点可以是宏基站(如图1b中的110a),也可以是微基站或室内站(如图1b中的110b),还可以是中继节点或施主节点。
在另一种应用场景中,可以通过多个RAN节点的协作来帮助终端实现无线接入,不同的RAN节点分别实现基站的部分功能。例如,RAN节点可以是集中式单元(central unit,CU)、分布式单元(distributed unit,DU)或无线单元(radio unit,RU)。这里的CU完成基站的无线资源控制协议和分组数据汇聚层协议(packet data convergence protocol,PDCP)的功能,还可以完成业务数据适配协议(service data adaptation protocol,SDAP)的功能;DU完成基站的无线链路控制层和介质访问控制(medium access control,MAC)层的功能,还可以完成部分物理层或全部物理层的功能,有关上述各个协议层的具体描述,可以参考3GPP的相关技术规范。RU可以用于实现射频信号的收发功能。CU和DU可以是两个独立的RAN节点,也可以是集成在同一个RAN节点中,例如集成在基带单元(baseband unit,BBU)中。RU可以包括在射频设备中,例如包括在射频拉远单元(remote radio unit,RRU)或有源天线单元(active antenna unit,AAU)。CU可以进一步划分为CU-控制面和CU-用户面两种类型的RAN节点。
在不同的系统中,RAN节点可能有不同的名称,例如,在开放式接入网(open RAN,O-RAN或ORAN)系统中,CU也可以称为O-CU(开放式CU),DU也可以称为O-DU,CU-CP也可以称为O-CU-CP,CU-UP也可以称为O-CU-UP,RU也可以称为O-RU。为描述方便,本申请中以CU,CU-CP,CU-UP、DU和RU为例进行描述。本申请中的CU(或CU-CP、CU-UP)、DU和RU中的任一单元,可以是通过软件模块、硬件模块、或者软件模块与硬件模块结合来实现。
接入网设备和终端设备之间的通信遵循一定的协议层结构。该协议层可以包括控制面协议层和用户面协议层。控制面协议层可以包括以下至少一项:无线资源控制(radio resource control,RRC)层、分组数据汇聚层协议(packet data convergence protocol,PDCP)层、无线链路控制(radio link control,RLC)层、媒体接入控制(media access control,MAC)层、或物理(physical,PHY)层等。用户面协议层可以包括以下至少一项:业务数据适配协议(service data adaptation protocol,SDAP)层、PDCP层、RLC层、MAC层、或物理层等。
对于ORAN系统中的网元及其可实现的协议层功能对应关系,可参照下表1。
表1
为了便于描述,下文中以基站作为RAN节点的一个举例进行描述。
终端是具有无线收发功能的设备,可以向基站发送信号,或接收来自基站的信号。终端也可以称为终端设备、用户设备(user equipment,UE)、移动台、移动终端等。终端可以广泛应用于各种场景,例如,设备到设备(device-to-device,D2D)、车物(vehicle to everything,V2X)通信、机器类通信(machine-type communication,MTC)、物联网(internet of things,IOT)、虚拟现实、增强现实、工业控制、自动驾驶、远程医疗、智能电网、智能家具、智能办公、智能穿戴、智能交通、智慧城市等。终端可以是手机、平板电脑、带无线收发功能的电脑、可穿戴设备、车辆、飞机、轮船、机器人、机械臂、智能家居设备等。本申请的实施例对终端所采用的具体技术和具体设备形态不做限定。
基站和终端可以是固定位置的,也可以是可移动的。基站和终端可以部署在陆地上,包括室内或室外、手持或车载;也可以部署在水面上;还可以部署在飞机、气球和人造卫星上。本申请的实施例对基站和终端的应用场景不做限定。
基站和终端的角色可以是相对的,例如,图1中的直升机或无人机120i可以被配置成移动基站,对于那些通过120i接入到无线接入网100的终端120j来说,终端120i是基站;但对于基站110a来说,120i是终端,即110a与120i之间是通过无线空口协议进行通信的。当然,110a与120i之间也可以是通过基站与基站之间的接口协议进行通信的,此时,相对于110a来说,120i也是基站。因此,基站和终端都可以统一称为通信装置,图1中的110a和110b可以称为具有基站功能的通信装置,图1中的120a-120j可以称为具有终端功能的通信装置。
基站和终端之间、基站和基站之间、终端和终端之间可以通过授权频谱进行通信,也可以通过免授权频谱进行通信,也可以同时通过授权频谱和免授权频谱进行通信;可以通过6千兆赫(gigahertz,GHz)以下的频谱进行通信,也可以通过6GHz以上的频谱进行通信,还可以同时使用6GHz以下的频谱和6GHz以上的频谱进行通信。本申请的实施例对无线通信所使用的频谱资源不做限定。
在本申请的实施例中,基站的功能也可以由基站中的模块(如芯片)来执行,也可以由包含有基站功能的控制子系统来执行。这里的包含有基站功能的控制子系统可以是智能电网、工业控制、智能交通、智慧城市等上述应用场景中的控制中心。终端的功能也可以由终端中的模块(如芯片或调制解调器)来执行,也可以由包含有终端功能的装置来执行。
在无线通信系统(例如图1b所示通信系统1000)中,MIMO技术作为无线通信的一项关键技术,可以用来满足高速率的传输需求。以网络设备和终端设备之间的通信过程为例,终端设备可以向网络设备发送DMRS,网络设备可以通过该DMRS进行信道估计,以便于后续与终端设备进行通信。
解调参考信号主要用于信道估计。DMRS包括:基于物理下行共享信道(physical downlink shared channel,PDSCH)的DMRS,即:DMRS for PDSCH、基于物理下行控制信道(physical downlink control channel,PDCCH)的DMRS,即:DMRS for PDCCH、基于物理上行共享信道(physical uplink shared channel,PUSCH)的DMRS,即:DMRS for PUSCH、基于物理上行控制信道(physical uplink control channel,PUCCH)的DMRS,即:DMRS for PUCCH。
以DMRS for PDSCH为例,DMRS包括类型(type)1和type2两种类型。
如图2a所示,图2a为本申请实施例提供的一种type1的DMRS的图案示意图。在图2a中,每个小方格代表资源,其中,横轴表示时域资源,纵轴表示频域资源。其中,一个小方格在时域上对应一个OFDM符号,在频域上对应一个频域资源元素(resource element,RE)。
图2a左侧所示的DMRS在时域上占据单个正交频分复用(orthogonal frequency division multiplexing,OFDM)符号,图2a右侧所示的DMRS在时域上占据两个OFDM符号。
type1 DMRS在频域的密度为1/2。针对图2a左侧的DMRS图案,其对应的天线端口号为1000~1003;针对图2a右侧的DMRS图案,其对应的天线端口号为1000~1007。图2a中带有不同阴影的方块用于区分不同的码分复用(code division multiplexing,CDM)组。一种阴影对应一个CDM组。相同CDM组内,通过正交覆盖码(orthogonal cover code,OCC)码来区分不同的天线端口。例如,针对图2a所示的天线端口号1001和1001,接收机(例如网络设备)分别利用[+1,+1]和[+1,-1]两种频域正交覆盖码(orthogonal cover code,OCC)码来区分不同端口。类似的,针对图2a所示的天线端口号1000、1001、1004和1005,接收机分别利用[+1,+1,+1,+1]、[+1,+1,-1,-1]、[+1,-1,+1,-1]和[+1,-1,-1,+1]四种频域OCC码来区分不同端口。而对于属于不同CDM组的端口,可以直接通过频域资源和/或时域资源进行区分。
参见图2b,图2b为本申请实施例提供的一种type2的DMRS的图案示意图。
图2b左侧所示的DMRS在时域上占据单个OFDM符号,图2b右侧所示的DMRS在时域上占据两个OFDM符号。
type2 DMRS在频域的密度为1/3。针对图2b左侧的DMRS图案,其对应的天线端口号为1000~1005;针对图2b右侧的DMRS图案,其对应的天线端口号为1000~1011。对于type2 DMRS对应3个CDM组。与type 1DMRS类似,相同CDM组内,通过OCC码来区分不同的天线端口,而对于属于不同CDM组的端口,可以直接通过频域资源和/或时域资源进行区分。
在一个示例中,DMRS for PUSCH可以包括前置(front loaded,FL)DMRS和附加(additional)DMRS。换言之,PUSCH可以承载前置DMRS和附加DMRS。其中,前置DMRS可以用于信道估计。在一些场景中,若利用前置DMRS进行信道估计的效果不佳,也可以结合前置DMRS和附加DMRS进行信道估计,以提升信道估计的效果。
上文提及的端口,指的是天线端口。天线端口可以理解为被接收端所识别的发射天线,或者在空间上可以区分的发射天线。针对每个虚拟天线可以预配置一个天线端口,每个虚拟天线可以为多个物理天线的加权组合,每个天线端口可以与一个参考信号(reference signal,RS)对应,因此,每个天线端口可以称为一个参考信号的端口。例如,每个天线端口可以被称为DMRS端口。
其中,天线端口是一个逻辑概念,一个天线端口与一个物理天线一般没有直接对应关系。天线端口通常和参考信号关联,其意义可以理解为参考信号所经历的信道上的一个收发接口。对于低频,一个天线端口可能对应一个或多个天线阵元,这些阵元联合发送参考信号,接收端可以把它们当做一个整体,不需要区分这些阵元。对于高频系统,天线端口可能对应着一个波束,同样的,接收端需要将这个波束视为一个接口,不需要区分每个阵元。
参见图2c,该图为本申请实施例提供的一种下行MU-MIMO场景的示意图。
在图2c所示的场景中,以网络设备为BS,终端设备为UE为例说明。BS通过UE发送的探测参考信号(sounding reference signal,SRS)以及上下行信道的互易性来估计下行信道,随后再进行发端预编码以消除用户间干扰,但由于SRS非理想因素(例如干扰,路损)和预编码粒度,导致向多个UE发送的信号间仍存在残余干扰。但是由于预编码已经消除了主要能量干扰,对DMRS端口正交性需求较低。其中,预编码粒度可以用于指示预编码所覆盖的频率资源的范围。具体可参考下文的描述。
关于预编码技术,需要说明的是:
发送端可以在已知信道状态的情况下,借助与信道相匹配的预编码矩阵来对待发送信号进行处理后发送,使得经过预编码的发送信号与信道相适配。从而,相比于接收端接收未经过预编码的发送信号并消除信道间影响的处理过程,接收端接收经过预编码的发送信号并消除信道间影响的处理过程的复杂度降低。因此,通过对待发送信号的预编码处理,接收信号质量(例如信号与干扰加噪声比(signal to interference plus noise ratio,SINR)等)得以提升。采用预编码技术,还可以实现发送端与多个接收端在相同的时频资源上传输,也就是实现了MU-MIMO。其中,发送端可以基于一定的预编码粒度进行预编码,预编码粒度的单位是资源单元组(resource element group,REG),根据预编码粒度的不同,预编码可以包括子带预编码和全带预编码。其中,子带预编码是指按照预编码粒度x进行预编码,x小于调度带宽包括的资源块(resource block,RB)个数,其中,一个RB和一个REG均包括12个RE。全带预编码则按照调度带宽包括的RB个数进行一次预编码。
可选地,该发送端可以为网络设备,该接收端可以为终端设备;或,该发送端可以为终端设备,该接收端可以为终端设备。
一种实现方式中,采用多输入多输出(Multiple Input Multiple Output,MIMO)技术增加系统容量,提升吞吐率。数学表达式为y=Hx+n,其中y为接收信号,H为MIMO信道的信道矩阵,x为发送信号,n为噪声。在具有多天线的通信系统中,多个发送天线的信号会叠加到任意一个接收天线上,因此发送端发送信号的方法影响到系统的性能,而且在接收端恢复发送信号时,往往比较复杂。在这个背景下,预编码(Precoding)一方面用于减少系统开销,最大提升MIMO的系统容量,另一方面用于降低接收机消除信道间影响实现的复杂度。此时,数学表达为y=HPx+n,P为预编码矩阵(或向量)。为了简化实现复杂度,P为可以从一个预定义的矩阵(或向量)集合中选取,该集合被称为码本(Codebook),该方法也被称为基于码本的发送方法。如果发送端可以获知H的全部信息,则P可以在发送端自行获取,该方法也被称为非码本的发送方法(Non-codebook,NCB)。
应理解,有关预编码技术的相关描述仅为便于理解而示例,并非用于限制本申请实施例的保护范围。在具体实现过程中,发送端还可以通过其他方式进行预编码。例如,在无法获知信道信息(例如但不限于信道矩阵)的情况下,采用预先设置的预编码矩阵或者加权处理方式进行预编码等。为了简洁,其具体内容本文不再赘述。
参见图2d,该图为本申请实施例提供的一种上行MU-MIMO场景的示意图。
在图2d所示的场景中,同样以网络设备为BS,终端设备为UE为例说明。如图2d所示,由于UE之间无法进行干扰抑制,干扰抑制完全依赖于收端即BS处理。即:在多个UE均向BS发送DMRS的情况下,多个UE发送的DMRS之间会互相干扰,若要消除这种干扰,可以控制各UE发送DMRS的端口保持较好的正交性。换言之,BS可以使用正交的端口来消除其它UE的干扰。
随着用户数量(即UE数量)的增多,例如,在上6G(upper 6G,U6G)频段,UE的数量可以达到64。则端口设计可以参考图2e所示,图2e为本申请实施例提供的一种DMRS对应的端口示意图。在图2e中,带有阴影的方格对应的资源用于承载DMRS,无阴影的方格用于承载用户数据。则如图2e可知,随着端口数量的增多,DMRS所占用的资源也就越多,相应的,承载用户数据的资源相应的会减少,从而导致PUSCH的资源利用率变低。其中,在图2e中,其中时域正交覆盖码(time domain orthogonal cover code,TD-OCC)指的是DMRS在时域上占用的OFDM符号的个数,循环移位(circular shift,CS)指的是频域CDM端口数目。
另外,终端设备在向网络设备发送PUSCH时,可以发送不同的信号。例如,可以发送循环前缀正交频分复用(cyclic prefix orthogonal frequency division multiplexing,CP-OFDM)信号,又如,可以发送离散傅里叶转换-扩展正交频分复用(discrete fourier transformation spreading OFDM,DFT-s-OFDM)信号。其中:
当终端设备向网络设备发送的PUSCH承载CP-OFDM信号时,PUSCH承载的DMRS由黄金(gold)序列产生;当终端设备向网络设备发送的PUSCH承载DFT-s-OFDM信号时,PUSCH承载的DMRS由ZC(英文:Zadoff-Chu)序列生成,或者,由gold序列映射成pi/2二进制相移键控(binary phase shift keying,BPSK)序列产生。由于不同序列使用不同的正交基函数生成,所以CP-OFDM信号和DFT-s-OFDM信号间是无法进行频域CDM和/或时域CDM。
在一个示例中,针对发送某一信号(例如CP-OFDM或者DFT-s-OFDM)的不同终端设备间需使用正交端口。可结合图2f理解,图2f为本申请实施例提供的一种DMRS支持的正交端口的布局示意图。
如图2f所示,DMRS支持CP-OFDM信号的正交端口数8、DFT-s-OFDM信号的正交端口数8。其中,图2f左侧部分的附图“(a)均衡组合”中实线框框出来的部分代表8个终端设备,该8个终端设备可以利用前述8个支持CP-OFDM信号的正交端口数向网络设备发送DMRS。图2f左侧附图(a)中虚线框框出来的部分代表8个终端设备,该8个终端设备可以利用前述8个支持DFT-s-OFDM的正交端口数向网络设备发送DMRS。
在此场景中,当发送CP-OFDM信号的终端设备的数量与发送DFT-s-OFDM信号的终端设备的数量相同,例如均达到8时,前述16个端口的复用能力最大化(对应图2f左侧附图(a)示出的情况)。当发送CP-OFDM信号的终端设备的数量与发送DFT-s-OFDM信号的终端设备的数量不同时,前述16个端口的复用能力较差。例如,当发送CP-OFDM信号的终端设备的数量为12、发送DFT-s-OFDM信号的终端设备的数量为4时(对应图2f右侧部分的附图“(b)非均衡组合”示出的情况),虽然能够用于发送DFT-s-OFDM信号的正交端口还有4个端口空闲,但是该4个空闲端口也不适合用于发送CP-OFDM信号,因为若利用该4个空闲端口发送CP-OFDM信号,则会导致发送的CP-OFDM信号受其它终端设备发送的信号干扰,从而使得网络设备无法准确的进行信道估计。
有鉴于此,本申请实施例提供了一种通信方法,利用该方法,可以在终端设备无需采用正交端口发送DMRS的情况下,也能准确的进行信道估计。正是因为终端设备无需采用正交端口发送DMRS,因此,在用户数量增多的情况下,也能够保证PUSCH的资源利用率(即使得PUSCH的更多资源能够用于传输用户数据)。
接下来,结合图3,以网络设备和终端设备通信为例,介绍本申请实施例提供的通信方法。
图3为本申请实施例提供的一种通信方法的流程示意图。图3所示的方法,包括如下S101-S104。
S101:网络设备向第一终端设备发送第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号。
在一个示例中,所述第一解调参考信号可以是前置解调参考信号。在此场景中,所述第一指示信息可以用于指示前置解调参考信号和功率为0的零功率解调参考信号。其中,功率为0的零功率解调参考信号,也可以理解成幅值为0的解调参考信号。
在又一个示例中,所述第一解调参考信号可以包括前置解调参考信号和附加解调参考信号。在此场景中,所述第一指示信息可以用于指示前置解调参考信号、附加解调参考信号以及功率为0的零功率解调参考信号。
在本申请实施例中,第一指示信息指示第二解调参考信号,可以是指示所述第二解调参考信号的图案。本申请实施例不具体限定所述第一指示信息指示所述第二解调参考信号的图案的方式,以下介绍几种可能的方式。
作为一个具体的示例,第二解调参考信号的图案可以与第一PUSCH对应的第一信号波形相关,因此,在一个示例中,所述第一指示信息可以包括所述第一信号波形,通过所述第一信号波形来指示所述第二解调参考信号的图案。其中,第一指示信息包括所述第一信号波形,例如可以是第一指示信息中包括所述第一信号波形的标识。本申请实施例不具体限定所述第一信号波形,所述第一信号波形,可以是CP-OFDM,DFT-s-OFDM和过滤子载波正交振幅调制(filter subcarrier quadrature amplitude modulation,Filter SC-QAM)中的其中一种。
作为又一个具体的示例,第二解调参考信号的图案可以与第一解调参考信号(例如前置解调参考信号)对应的第一序列相关。因此,在一个示例中,所述第一指示信息可以包括所述第一序列,通过所述第一序列来指示所述第二解调参考信号的图案。其中,第一指示信息包括所述第一序列,例如可以是第一指示信息中包括所述第一序列的标识。本申请实施例不具体限定所述第一序列,所述第一序列可以根据实际情况确定。例如,所述第一序列可以是ZC序列、gold序列、pi/2BPSK序列和golay等序列中的其中一种。
作为另一个具体的示例,所述第二解调参考信号的图案可以与前述第一信号波形和第一序列均相关,对于这种情况,所述第一指示信息可以包括所述第一信号波形和第一序列,通过所述第一信号波形和所述第一序列来指示所述第二解调参考信号的图案。
作为又一个具体的示例,考虑到第二解调参考信号的图案索引,能够用于确定所述第二解调参考信号的图案。因此,在一个示例中,所述第一指示信息包括所述第二解调参考信号的图案索引,通过该图案索引来指示所述第二解调参考信号的图案。其中,第二解调参考信号的图案索引例如可以对应一个编号。
作为另一个具体的示例,考虑到第二解调参考信号的图案包括其占用的时域资源和频域资源两个维度的信息。因此,可以通过所述第一指示信息来指示所述第二解调参考信号占用的时域资源和/或所述第二解调参考信号占用的频域资源。
在一个示例中,第二解调参考信号占用的时域资源,指的是所述第二解调参考信号占用的OFDM符号的位置。作为一个示例,第二解调参考信号所占用的OFDM符号的位置,可以通过第二解调参考信号占用的OFDM符号的索引来指示。因此,所述第一指示信息可以包括所述第二解调参考信号占用的OFDM符号的索引,通过该第二解调参考信号占用的OFDM符号的索引,来指示所述第二解调参考信号占用的OFDM符号的位置。作为又一个示例,第二解调参考信号所占用的OFDM符号的位置,可以通过所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值(简称索引差值)来确定。因此,因此,所述第一指示信息可以包括所述索引差值,通过该索引差值,来指示所述第二解调参考信号占用的OFDM符号的位置。
在又一个示例中,所述第一指示信息可以包括所述第二解调参信号对应的频域资源的位置,以指示所述第二解调参考信号所占用的频域资源所处的位置。
在一个示例中,所述第二解调参考信号对应的频域资源可以疏分映射在调度带宽上。其中,频率资源疏分映射在调度带宽上,可以理解成频率资源均匀映射在调度带宽上。例如,当前述第一信号波形为单载波波形,例如DFT-s-OFDM信号波形时,为了保持低载波波形的低峰值平均功率比(peak to average power ratio,PAPR),所述第二解调参考信号对应的频域资源优选疏分映射在调度带宽上。当然,当前述第一信号波形为双载波波形,例如CP-OFDM信号波形时,所述第二解调参考信号对应的频域资源可以疏分映射在调度带宽上。
在又一个示例中,所述第二解调参考信号对应的频域资源,也可以占用调度带宽上的至少一个资源块。例如,当所述第一信号波形为单载波波形或者双载波波形时,所述第二解调参考信号对应的频域资源,也可以占用调度带宽上的至少一个资源块。
在本申请实施例中,若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则前述第二解调参考信号对应的频率资源的位置,可以包括所述第二解调参考信号对应的频域资源的起始频率资源位置和疏分密度,基于该起始频率资源位置和疏分密度,则可以确定所述第二解调参考信号对应的频域资源的位置。其中,疏分密度可以理解成第二解调参考信号对应的频率资源与整个调度带宽包括的频率资源的比值。例如,疏分密度为0.5,表示第二解调参考信号对应的频率资源占整个调度带宽包括的频率资源的一半,也就是说,第二解调参考信号对应的频率资源中,任意两个相邻的频率资源之间均间隔一个频率资源。假设前述起始频率资源位置为0,疏分密度为0.5,则可以确定所述第二解调参考信号对应的频域资源的位置包括编号为0、2、4…2n若干个频域资源(例如资源元素)。
在本申请实施例中,若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则前述第二解调参考信号对应的频率资源的位置,可以包括所述至少一个资源块的位置。即:通过指示所述至少一个资源块的位置的方式,指示所述第二解调参考信号对应的频域资源的位置。其中,针对所述至少一个资源块中的每个资源块,该资源块的位置,可以包括该资源块的起始位置、该资源块的结束位置以及资源块大小中的至少两项。例如,对于任一资源块而言,该资源块的位置,可以是该资源块的起始位置和资源块大小。又如,对于任一资源块而言,该资源块的位置,可以是该资源块的起始位置和该资源块的结束位置。再如,对于任一资源块而言,该资源块的位置,可以是该资源块的资源块大小和该资源块的结束位置。其中,资源块大小,例如可以是资源块包括的资源元素的数量。
在一个示例中,若前述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则在一个示例中,所述至少一个资源块可以与网络设备进行预编码的至少一个预编码子带一一对应,这样一来,网络设备在执行S104之后,在基于第二解调参考进行来评估来自其它终端设备的干扰时,能够在每个预编码子带上都能估计来自其它终端设备的干扰。
在本申请实施例中,第一解调参考信号和第二解调参考信号需要有一定的隔离度,从而使得网络设备能够基于第二解调参考信号来评估来自其它终端设备的干扰。在一个具体的示例中,所述第一解调参考信号和所述第二解调参考信号是时分的,也就是说,第一解调参考信号和第二解调参考信号在时域上,可以占用不同的OFDM符号。其中,所述第二解调参考信号在时域上可以占用一个OFDM符号,也可以占用多个OFDM符号,本申请实施例不做具体限定。
在本申请实施例中,第二解调参考信号是新引入的解调参考信号,所述第二解调参考信号所占用的资源(时域资源和频域资源)原本是用于承载用户数据的。在本申请实施例中,第二解调参考信号所在OFDM符号上的非解调参考信号载波位置,依然用于传递用户数据,从而有效利用第一PUSCH的资源。其中,此处提及的第二解调参考信号所在OFDM符号,指的是第二解调参考信号所占用的OFDM符号。第二解调参考信号所占用的OFDM符号,在一些场景中也可以描述成第二解调参考信号对应的OFDM符号。
关于所述第一解调参考信号和第二解调参考信号的图案,现以第一解调参考信号为前置解调参考信号为例,结合图4a和图4b进行说明。图4a为本申请实施例提供的一种第一解调参考信号和第二解调参考信号的图案的示意图。图4b为本申请实施例提供的又一种第一解调参考信号和第二解调参考信号的图案的示意图。
如图4a所示,前置解调参考信号的图案对应图中的401,其在时域上占用第3个以及第4个OFDM符号这两个OFDM符号,其在频率上占用的RB的编号为1,3,5,……2n+1。零功率解调参考信号的图案对应图中的402,在图4a中,零功率解调参考信号在时域上占用第一个OFDM符号,其和前置解调参考信号401是时分的;零功率解调参考信号的图案,疏分映射在调度带宽,具体的,其在频率上占用的RB的编号为0,2,4,……2n。
如图4b所示,前置解调参考信号的图案对应图中的403,其在时域上占用第3个以及第4个OFDM符号这两个OFDM符号,其在频率上占用的RB的编号为1,3,5,……2m+1。零功率解调参考信号的图案对应图中的404,在图4b中,零功率解调参考信号在时域上占用第一个OFDM符号,其和前置解调参考信号403是时分的;零功率解调参考信号的图案,占据所述调度带宽上的一个资源块。该资源块的大小为两个频域资源元素。
在图4a和图4b中,前置解调参考信号和零功率解调参考信号在时域上占用不同的OFDM符号,其中,前置解调参考信号在时域上占用两个OFDM符号,零功率解调参考信号在时域上占用一个OFDM符号。
在本申请实施例中,前述第一指示信息还可以包括第一解调参考信号的时域资源、第一解调参考信号的频域资源以及第一解调参考信号对应的端口号。其中:
第一解调参考信号的时域资源,包括:系统帧号,发送时隙,OFDM符号起始位置,时域OFDM个数中至少一种参数。在一个示例中,网络设备可以通过下行控制信息(downlink control information,DCI)中的起始和长度指示值(start and length indicator value,SLIV)字段来指示第一解调参考信号的时域资源。
上述第一解调参考信号的频域资源,包括:物理资源块(physical resource block,PRB)个数,部分带宽(bandwidth part,BWP),频段(band)、小区索引(serving cell ID),中心频点、子载波间隔(subcarrier spacing,SCS)等至少一种参数。在一个示例中,网络设备可以通过DCI或者无线资源控制(radio resource control,RRC)信令来指示第一解调参考信号的频域资源。
PUSCH承载的解调参考信号的图案与PDSCH承载的解调参考信号的图案类似,也可以包括type1和type2。因此,第一解调参考信号的图案可参考图2a和图2b,其也可以是type1或者type 2。
若第一解调参考信号的图案对应type 1,且其在时域上占用单个OFDM符号,则第一解调参考信号对应的端口号可以是1000、1001、1002以及1003中的其中一个。
若第一解调参考信号的图案对应type 1,且其在时域上占用两个OFDM符号,则第一解调参考信号对应的端口号可以是1000、1001、1002、1003、1004、1005、1006以及1007中的其中一个。
若第一解调参考信号的图案对应type 2,且其在时域上占用单个OFDM符号,则第一解调参考信号对应的端口号可以是1000、1001、1002、1003、1004、以及1005中的其中一个。
若第一解调参考信号的图案对应type 2,且其在时域上占用两个OFDM符号,则第一解调参考信号对应的端口号可以是1000、1001、1002、1003、1004、1005、1006、1007、1008、1009、1010以及1011中的其中一个。其中,若前述第一信号波形为单载波波形,则第一解调参考信号的图案优选对应type 1,来确保单载波的低PAPR特性。
需要说明的是,在本申请实施例中,网络设备可以通过一个或者多个信令,将第一指示信息发送给网络设备。例如,所述网络设备可以通过一条信令携带前述第一指示信息中的各项信息,也可以将前述各项信息分成几个部分,每个部分通过不同的信令来携带,本申请实施例不做具体限定。
S102:第一终端设备接收所述网络设备发送的第一指示信息。
S103:第一终端设备根据所述第一指示信息,向网络设备发送第一PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号。
网络设备向第一终端设备发送第一指示信息之后,第一终端设备可以接收网络设备发送的第一指示信息。第一终端设备接收第一指示信息之后,可以基于所述第一指示信息,确定第一解调参考信号的图案和第二解调参考信号的图案,并进一步地,基于所述第一解调参考信号的图案和第二解调参考信号的图案,生成第一解调参考信号和第二解调参考信号,以向网络设备发送第一PUSCH。
在一个示例中,若所述第一指示信息包括第一信号波形,该第一信号波形用于指示第二解调参考信号的图案,则所述第一终端设备可以基于信号波形和图案之间的第一对应关系和所述第一信号波形,确定所述第二解调参考信号的图案。此处提及的第一对应关系,可以是信号波形的标识和图案标识(例如图案索引)之间的对应关系。第一对应关系可以包括多个对应关系,该多个对应关系,至少包括所述第一信号波形和所述第二解调参考信号的图案之间的对应关系。
该第一对应关系可以结合下表2进行理解。表2中的一行表示第一对应关系中的一个对应关系。
表2
例如,所述第一指示信息中包括的第一信号波形为CP-OFDM,则基于表2所示的对应关系,可以确定第二解调参考信号的图案为图案1。又如,所述第一指示信息中包括的第一信号波形为DFT-s-OFDM,则基于表2所示的对应关系,可以确定第二解调参考信号的图案为图案2。再如,所述第一指示信息中包括的第一信号波形为Filter SC-QAM,则基于表2所示的对应关系,可以确定第二解调参考信号的图案为图案3。
在又一个示例中,若所述第一指示信息包括第一序列,该第一序列用于指示第二解调参考信号的图案,则所述第一终端设备可以基于序列和图案之间的第二对应关系和所述第一序列,确定所述第二解调参考信号的图案。此处提及的第二对应关系,可以是序列的标识和图案标识(例如图案索引)之间的对应关系。第二对应关系可以包括多个对应关系,该多个对应关系,至少包括所述第一序列和所述第二解调参考信号的图案之间的对应关系。
该第二对应关系可以结合下表3进行理解。表3中的一行表示第二对应关系中的一个对应关系。
表3
例如,所述第一指示信息中包括的第一序列为序列1,则基于表3所示的对应关系,可以确定第二解调参考信号的图案为图案1’。又如,所述第一指示信息中包括的第一序列为序列2,则基于表3所示的对应关系,可以确定第二解调参考信号的图案为图案2’。再如,所述第一指示信息中包括的第一序列为序列3,则基于表3所示的对应关系,可以确定第二解调参考信号的图案为图案3’。
关于表2和表3,需要说明的是:
对于表2中的任一图案(例如图案1),其可以和表3示出的各个图案均不相同,也可以和表3示出的某一图案(例如图案1’)相同,本申请实施例不做具体限定。
关于所述序列1至序列3中的任意两个序列,这两个序列可以是同一类序列,例如gold序列或者ZC序列或者golay序列或者pi/2BPSK序列,但是具体的序列参数不同。这两个序列也可以是不同类别的序列,例如,其中一个序列为gold序列,另外一个序列为ZC序列,等等,此处不一一列举说明。
在另一个示例中,若所述第一指示信息包括第一信号波形和第一序列,该第一信号波形和第一序列用于指示第二解调参考信号的图案,则所述第一终端设备可以基于信号波形、序列和图案三者之间的第三对应关系、以及所述第一信号波形和所述第一序列,确定所述第二解调参考信号的图案。此处提及的第三对应关系,可以是信号波形的标识、序列的标识和图案标识三者之间的对应关系。第三对应关系可以包括多个对应关系,该多个对应关系,至少包括所述第一信号波形、第一序列和所述第二解调参考信号的图案三者之间的对应关系。
该第三对应关系可以结合下表4进行理解。表4中的一行表示第三对应关系中的一个对应关系。
表4
例如,所述第一指示信息中包括的第一信号波形为CP-OFDM、第一序列为序列1,则基于表4所示的对应关系,可以确定第二解调参考信号的图案为图案1”。又如,所述第一指示信息中包括的第一信号波形为DFT-s-OFDM、第一序列为序列2,则基于表4所示的对应关系,可以确定第二解调参考信号的图案为图案2”。再如,所述第一指示信息中包括的第一信号波形为Filter SC-QAM、第一序列为序列3,则基于表4所示的对应关系,可以确定第二解调参考信号的图案为图案3”。
关于表2、表3和表4,需要说明的是:
对于表2中的任一图案(例如图案1),其可以和表4示出的各个图案均不相同,也可以和表4示出的某一图案(例如图案1”)相同,本申请实施例不做具体限定。
类似的,对于表3中的任一图案(例如图案1’),其可以和表4示出的各个图案均不相同,也可以和表4示出的某一图案(例如图案1”)相同,本申请实施例不做具体限定。
在一个示例中,所述第一终端设备可以根据前述第一解调参考信号的端口号,确定所述第一解调参考信号的图案。
另外,第一终端设备还可以生成前述第一序列。以进一步结合所述第一解调参考信号的图案和所述第一序列,生成第一解调参考信号。并基于第二解调参考信号的图案,将零功率信号映射到第二解调参考信号的图案所指示的资源上,从而获得第二解调参考信号,以进一步向网络设备发送承载所述第一解调参考信号和第二解调参考信号的第一PUSCH。此处需要说明的是,所述第一PUSCH中除了承载所述第一解调参考信号和第二解调参考信号之外,还承载了用户数据。
本申请实施例不具体限定第一终端设备生成第一序列的具体实现方式,第一序列的生成方式例如可以沿用传统技术,此处不做详细说明。
S104:网络设备接收第一终端设备发送的所述第一PUSCH。
网络设备接收第一终端设备发送的第一PUSCH之后,可以基于第一解调参考信号和第二解调参考信号进行信道估计。在一个具体的示例中,所述网络设备可以基于所述第二解调参考信号,估计来自其它网络设备的干扰。具体的,由于第二解调参考信号为零功率解调参考信号,因此,网络设备在第二解调参考信号对应的频域资源上接收的信号,均为来自其它终端设备的干扰。也就是说,网络设备可以基于在第二解调参考信号对应的频域资源上接收的信号,评估来自其它终端设备的干扰。可结合以下公式(1)理解:
rB[k]=∑m∈BHm[k]xm[k]+n[k] 公式(1)
在公式(1)中:
k表示第二解调参考信号对应的频域资源位置;
B是其它终端设备的集合;
rB[k]为来自其它终端设备的干扰。
确定rB[k]之后,网络设备可以进一步基于rB[k]和第一解调参考信号,进行信道估计。由于在进行信道估计时,已经确认了来自其它终端设备的干扰,因此,网络设备可以准确的进行信道估计,即:利用本方案,可以保证信道估计的精度。
在本申请实施例中,网络设备和任一终端设备之间,均可以采用图3所示的方式交互,以进行信道估计。换言之,网络设备还可以向第二网络设备发送第二指示信息,第二指示信息用于指示第三解调参考信号和第四解调参考信号,所述第四解调参考信号为功率为0的零功率解调参考信号。相应的,第二终端设备可以基于第二指示信息,向网络设备发送第二PUSCH,所述第二PUSCH承载所述第三解调参考信号和所述第四解调参考信号。
关于第三解调参考信号,可以参考前文对于第一解调参考信号的描述部分。关于第四解调参考信号,也可以参考前文对于第二解调参考信号的描述部分,此处不做重复描述。
此处需要说明的是,为了准确的对网络设备和各终端设备之间的信道进行估计,网络设备向各第一终端设备所指示的第二解调参考信号,与网络设备向第二终端设备所指示的第四解调参考信号,需占用不同的资源。
作为一个示例,所述第四解调参考信号和所述第二解调参考信号是时分的。可参考图4c中的(a)图和(c)图进行理解,图4c为本申请实施例提供的零功率解调参考信号的示意图。图4c中的(a)图,示出了图案405,图案405可以是第二解调参考信号对应的图案。图案405在时域上占用第1个OFDM符号,并且,其在频率上占用的RB的编号为0,2,4,……2p。图4c中的(c)图,示出了图案407,图案407可以是第四解调参考信号对应的图案。图案407在时域上占用第2个OFDM符号,并且,其在频率上占用的RB的编号为0,2,4,……2k。
作为又一个示例,所述第四解调参考信号和所述第二解调参考信号在频率上占用不同的资源块。可参考图4c中的(a)图和(b)图进行理解,图4c中的(a)图,示出了图案405,图案405可以是第二解调参考信号对应的图案。图4c中的(b)图,示出了图案406,图案406可以是第四解调参考信号对应的图案。图案405和图案406在时域上均占用第1个OFDM符号,但是图案405在频率上占用的RB的编号为0,2,4,……2p,图案406在频率上占用的RB的编号为1,3,5,……2p+1。
作为又一个示例,所述第四解调参考信号和所述第二解调参考信号,不仅是时分的,而且在频率上占用不同的资源块。可参考图4c中的(b)图和(c)图进行理解,在此场景中,作为一个示例,图4c中的(b)图示出的图案406,可以是第二解调参考信号的图案。图4c中的(c)图示出的图案407,可以是第四解调参考信号的图案,关于图案406和407,可以参考上文的相关描述,此处不做重复描述。
另外,第一终端设备用于发送所述第一解调参考信号的端口号和所述第二终端设备用于发送所述第三解调参考信号的端口号可以相同。换言之,第一终端设备用于发送所述第一解调参考信号的端口和所述第二终端设备用于发送所述第三解调参考信号的端口可以非正交。也就是说,利用本申请实施例的方案,通过引入额外的零功率解调参考信号来评估来自其它网络设备的干扰,从而使得不同终端设备发送前置解调参考信号的端口无需正交。
基于以上实施例提供的通信方法,本申请实施例还提供了对应的通信装置,以下结合附图介绍该装置。
请参阅图5,本申请实施例提供了一种通信装置500,该装置500包括处理单元501和收发单元502。其中,收发单元502,包括用于接收数据的接收单元和用于发送数据的发送单元。
该通信装置500可以实现上述方法实施例中终端设备(或网络设备)的功能,因此也能实现上述方法实施例所具备的有益效果。在本申请实施例中,该通信装置500可以是终端设备(或网络设备),也可以是终端设备(或网络设备)内部的集成电路或者元件等,例如芯片。下文实施例以该通信装置500为终端设备或网络设备为例进行说明。
在一些实施例中,该装置500为用于执行前述实施例中终端设备(例如第一终端设备)所执行的方法,对于这种情况:
所述接收单元,用于接收第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号;
所述发送单元,用于根据所述第一指示信息,发送第一物理上行共享信道PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号,所述第一解调参考信号和所述第二解调参考信号用于进行信道估计。
在一种可能的实现方式中,所述第一指示信息包括:所述第一PUSCH对应的第一信号波形和/或所述第一解调参考信号对应的第一序列,所述第一信号波形和/或所述第一序列,用于确定所述第二解调参考信号的图案;所述处理单元501,用于在发送所述第一PUSCH之前,根据所述第一信号波形和/或所述第一序列,确定所述第二解调参考信号的图案。
在一种可能的实现方式中,所述处理单元501,用于:
根据所述第一信号波形、以及信号波形和图案之间的第一对应关系,确定所述第二解调参考信号的图案,所述第一对应关系至少包括所述第一信号波形和所述第二解调参考信号的图案之间的对应关系;或者,
根据所述第一序列、以及序列和图案之间的第二对应关系,确定所述第二解调参考信号的图案,所述第二对应关系至少包括所述第一序列和所述第二解调参考信号的图案之间的对应关系;或者,
根据所述第一信号波形、所述第一序列、以及信号波形、序列和图案三者之间的第三对应关系,确定所述第二解调参考信号的图案,所述第三对应关系至少包括所述第一信号波形、所述第一序列和所述第二解调参考信号的图案之间的对应关系。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号的图案索引,所述第二解调参考信号的图案索引用于确定所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号所占用的正交频分复用OFDM符号的索引;或者,索引差值,所述索引差值为所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值,所述OFDM符号的索引或者所述索引差值用于指示所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号对应的频率资源的位置,其中:若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则所述位置包括:起始频率资源位置和疏分密度;或者,若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则所述位置包括:所述至少一个资源块中每个资源块的起始位置、结束位置以及资源块大小中的至少两项。
在一种可能的实现方式中,若所述第一信号波形为单载波波形,则所述第二解调参考信号对应的频率资源疏分映射在调度带宽上;或者,若所述第一信号波形为多载波波形,则所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,或者,所述第二解调参考信号对应的频率资源疏分映射在调度带宽上。
在一种可能的实现方式中,所述至少一个资源块与进行预编码的至少一个预编码子带一一对应。
在一种可能的实现方式中,所述第一解调参考信号,包括:前置解调参考信号,或者,前置解调参考信号以及附加解调参考信号。
在一种可能的实现方式中,所述第一解调参考信号和所述第二解调参考信号是时分的。
在一种可能的实现方式中,所述第二解调参考信号所在的OFDM符号上的非解调参考信号载波位置,用于传递用户数据。
在另一些实施例中,该装置500为用于执行前述实施例中网络设备所执行的方法,对于这种情况:
所述发送单元,用于发送第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号;
所述接收单元,用于接收基于所述第一指示信息发送的第一物理上行共享信道PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号,所述第一解调参考信号和所述第二解调参考信号用于进行信道估计。
在一种可能的实现方式中,所述第一指示信息包括:所述第一PUSCH对应的第一信号波形和/或所述第一解调参考信号对应的第一序列,所述第一信号波形和/或所述第一序列,用于确定所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号的图案索引,所述第二解调参考信号的图案索引用于确定所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息,包括:所述第二解调参考信号所占用的正交频分复用OFDM符号的索引;或者,索引差值,所述索引差值为所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值,所述OFDM符号的索引或者所述索引差值用于指示所述第二解调参考信号的图案。
在一种可能的实现方式中,所述第一指示信息包括:所述第二解调参考信号对应的频率资源的位置,其中:若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则所述位置包括:起始频率资源位置和疏分密度;或者,若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则所述位置包括:所述至少一个资源块中每个资源块的起始位置、结束位置以及资源块的大小中的至少两项。
在一种可能的实现方式中,若所述第一信号波形为单载波波形,则所述第二解调参考信号对应的频率资源疏分映射在调度带宽上;或者,若所述第一信号波形为多载波波形,则所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,或者,所述第二解调参考信号对应的频率资源疏分映射在调度带宽上。
在一种可能的实现方式中,所述至少一个资源块与进行预编码的至少一个预编码子带一一对应。
在一种可能的实现方式中,所述第一解调参考信号,包括:前置解调参考信号,或者,前置解调参考信号以及附加解调参考信号。
在一种可能的实现方式中,所述第一解调参考信号和所述第二解调参考信号是时分的。
在一种可能的实现方式中,所述第二解调参考信号所在的OFDM符号上的非解调参考信号载波位置,用于传递用户数据。
在一种可能的实现方式中,所述发送单元,还用于:发送第二指示信息,所述第二指示信息用于指示第三解调参考信号和第四解调参考信号,所述第四解调参考信号为功率为0的零功率解调参考信号,其中:用于发送所述第三解调参考信号的端口号和用于发送所述第一解调参考信号的端口号相同;所述接收单元,还用于接收基于所述第二指示信息发送的第二PUSCH,所述第二PUSCH承载所述第三解调参考信号和所述第四解调参考信号,所述第三解调参考信号和所述第四解调参考信号用于进行信道估计;其中:所述第四解调参考信号和所述第二解调参考信号是时分的,和/或,所述第四解调参考信号和所述第二解调参考信号在频率上占用不同的资源块。
需要说明的是,上述通信装置500的单元的信息执行过程等内容,具体可参见本申请前述所示的方法实施例中的叙述,此处不再赘述。
请参阅图6,为本申请提供的另一种通信装置的结构示意图,通信装置600包括逻辑电路601和输入输出接口602。其中,通信装置600可以为芯片或集成电路。
该通信装置600可以实现上述方法实施例中终端设备(或网络设备)的功能,因此也能实现上述方法实施例所具备的有益效果。在本申请实施例中,该通信装置600可以是终端设备(或网络设备),也可以是终端设备(或网络设备)内部的集成电路或者元件等,例如芯片。下文实施例以该通信装置600为终端设备或网络设备为例进行说明。
其中,图5所示收发单元502可以为通信接口,该通信接口可以是图6中的输入输出接口602,该输入输出接口602可以包括输入接口和输出接口。或者,该通信接口也可以是收发电路,该收发电路可以包括输入接口电路和输出接口电路。
一种可能的实现方式中,当该装置600为用于执行前述实施例中终端设备(例如第一终端设备)所执行的方法时:该输入输出接口602用于接收第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号;根据所述第一指示信息,发送第一物理上行共享信道PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号,所述第一解调参考信号和所述第二解调参考信号用于进行信道估计;在一个示例中,该逻辑电路601用于在发送所述第一PUSCH之前,根据所述第一信号波形和/或所述第一序列,确定所述第二解调参考信号的图案。
其中,逻辑电路601和输入输出接口602还可以执行前述实施例中终端设备执行的其他步骤并实现对应的有益效果,此处不再赘述。
一种可能的实现方式中,当该装置600为用于执行前述实施例中网络设备所执行的方法时:该输入输出接口602用于发送第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号;接收基于所述第一指示信息发送的第一物理上行共享信道PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号,所述第一解调参考信号和所述第二解调参考信号用于进行信道估计。在一个示例中,所述逻辑电路601用于基于所述第一解调参考信号和所述第二解调参考信号,进行信道估计。
其中,逻辑电路601和输入输出接口602还可以执行前述实施例中网络设备执行的其他步骤并实现对应的有益效果,此处不再赘述。
在一种可能的实现方式中,图5所示处理单元501可以为图6中的逻辑电路601。
可选的,逻辑电路601可以是一个处理装置,处理装置的功能可以部分或全部通过软件实现。其中,处理装置的功能可以部分或全部通过软件实现。
可选的,处理装置可以包括存储器和处理器,其中,存储器用于存储计算机程序,处理器读取并执行存储器中存储的计算机程序,以执行任意一个方法实施例中的相应处理和/或步骤。
可选地,处理装置可以仅包括处理器。用于存储计算机程序的存储器位于处理装置之外,处理器通过电路/电线与存储器连接,以读取并执行存储器中存储的计算机程序。其中,存储器和处理器可以集成在一起,或者也可以是物理上互相独立的。
可选地,该处理装置可以是一个或多个芯片,或一个或多个集成电路。例如,处理装置可以是一个或多个现场可编程门阵列(field-programmable gate array,FPGA)、专用集成芯片(application specific integrated circuit,ASIC)、系统芯片(system on chip,SoC)、中央处理器(central processor unit,CPU)、网络处理器(network processor,NP)、数字信号处理电路(digital signal processor,DSP)、微控制器(micro controller unit,MCU),可编程控制器(programmable logic device,PLD)或其它集成芯片,或者上述芯片或者处理器的任意组合等。
请参阅图7,为本申请的实施例提供的上述实施例中所涉及的通信装置700,该通信装置700可以包括但不限于至少一个处理器701以及通信端口702。
进一步可选的,该装置还可以包括存储器703、总线704中的至少一个,在本申请的实施例中,该至少一个处理器701用于对通信装置700的动作进行控制处理。
此外,处理器701可以是中央处理器单元,通用处理器,数字信号处理器,专用集成电路,现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框,模块和电路。该处理器也可以是实现计算功能的组合,例如包含一个或多个微处理器组合,数字信号处理器和微处理器的组合等等。所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统,装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
该通信装置700可以实现上述方法实施例中终端设备(或网络设备)的功能。在本申请实施例中,该通信装置700可以是终端设备(或网络设备),也可以是终端设备(或网络设备)内部的集成电路或者元件等,例如芯片。图7所示通信装置的具体实现方式,均可以参考前述方法实施例中的叙述,此处不再一一赘述。
请参阅图8,为本申请的实施例提供的上述实施例中所涉及的通信装置800的结构示意图。
该通信装置800可以实现上述方法实施例中终端设备(或网络设备)的功能,因此也能实现上述方法实施例所具备的有益效果。在本申请实施例中,该通信装置800可以是终端设备(或网络设备),也可以是终端设备(或网络设备)内部的集成电路或者元件等,例如芯片。
通信装置800包括至少一个处理器811以及至少一个网络接口814。进一步可选的,该通信装置还包括至少一个存储器812、至少一个收发器813和一个或多个天线815。处理器811、存储器812、收发器813和网络接口814相连,例如通过总线相连,在本申请实施例中,该连接可包括各类接口、传输线或总线等,本实施例对此不做限定。天线815与收发器813相连。网络接口814用于使得通信装置通过通信链路,与其它通信设备通信。例如网络接口814可以包括通信装置与核心网设备之间的网络接口,例如S1接口,网络接口可以包括通信装置和其他通信装置(例如其他网络设备或者核心网设备)之间的网络接口,例如X2或者Xn接口。
处理器811主要用于对通信协议以及通信数据进行处理,以及对整个通信装置进行控制,执行软件程序,处理软件程序的数据,例如用于支持通信装置执行实施例中所描述的动作。通信装置可以包括基带处理器和中央处理器,基带处理器主要用于对通信协议以及通信数据进行处理,中央处理器主要用于对整个终端设备进行控制,执行软件程序,处理软件程序的数据。图8中的处理器811可以集成基带处理器和中央处理器的功能,本领域技术人员可以理解,基带处理器和中央处理器也可以是各自独立的处理器,通过总线等技术互联。本领域技术人员可以理解,终端设备可以包括多个基带处理器以适应不同的网络制式,终端设备可以包括多个中央处理器以增强其处理能力,终端设备的各个部件可以通过各种总线连接。该基带处理器也可以表述为基带处理电路或者基带处理芯片。该中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中,也可以以软件程序的形式存储在存储器中,由处理器执行软件程序以实现基带处理功能。
存储器主要用于存储软件程序和数据。存储器812可以是独立存在,与处理器811相连。可选的,存储器812可以和处理器811集成在一起,例如集成在一个芯片之内。其中,存储器812能够存储执行本申请实施例的技术方案的程序代码,并由处理器811来控制执行,被执行的各类计算机程序代码也可被视为是处理器811的驱动程序。
图8仅示出了一个存储器和一个处理器。在实际的终端设备中,可以存在多个处理器和多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以为与处理器处于同一芯片上的存储元件,即片内存储元件,或者为独立的存储元件,本申请实施例对此不做限定。
收发器813可以用于支持通信装置与终端之间射频信号的接收或者发送,收发器813可以与天线815相连。收发器813包括发射机Tx和接收机Rx。具体地,一个或多个天线815可以接收射频信号,该收发器813的接收机Rx用于从天线接收该射频信号,并将射频信号转换为数字基带信号或数字中频信号,并将该数字基带信号或数字中频信号提供给该处理器811,以便处理器811对该数字基带信号或数字中频信号做进一步的处理,例如解调处理和译码处理。此外,收发器813中的发射机Tx还用于从处理器811接收经过调制的数字基带信号或数字中频信号,并将该经过调制的数字基带信号或数字中频信号转换为射频信号,并通过一个或多个天线815发送该射频信号。具体地,接收机Rx可以选择性地对射频信号进行一级或多级下混频处理和模数转换处理以得到数字基带信号或数字中频信号,该下混频处理和模数转换处理的先后顺序是可调整的。发射机Tx可以选择性地对经过调制的数字基带信号或数字中频信号时进行一级或多级上混频处理和数模转换处理以得到射频信号,该上混频处理和数模转换处理的先后顺序是可调整的。数字基带信号和数字中频信号可以统称为数字信号。
收发器813也可以称为收发单元、收发机、收发装置等。可选的,可以将收发单元中用于实现接收功能的器件视为接收单元,将收发单元中用于实现发送功能的器件视为发送单元,即收发单元包括接收单元和发送单元,接收单元也可以称为接收机、输入口、接收电路等,发送单元可以称为发射机、发射器或者发射电路等。
需要说明的是,图8所示通信装置800具体可以用于实现前述方法实施例中终端设备(或者网络设备)所实现的步骤,并实现网络设备对应的技术效果,图8所示通信装置800的具体实现方式,均可以参考前述方法实施例中的叙述,此处不再一一赘述。
本申请实施例还提供一种计算机可读存储介质,用于存储一个或多个计算机执行指令,当计算机执行指令被处理器执行时,该处理器执行如前述实施例中通信装置(例如第一终端设备或网络设备)可能的实现方式所述的方法。
本申请实施例还提供一种计算机程序产品(或称计算机程序),当计算机程序产品被该处理器执行时,该处理器执行上述通信装置(例如第一终端设备或网络设备)可能实现方式的方法。
本申请实施例还提供了一种芯片系统,该芯片系统包括至少一个处理器,用于支持通信装置实现上述通信装置可能的实现方式中所涉及的功能。可选的,所述芯片系统还包括接口电路,所述接口电路为所述至少一个处理器提供程序指令和/或数据。在一种可能的设计中,该芯片系统还可以包括存储器,存储器,用于保存该通信装置必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包含芯片和其他分立器件,其中,该通信装置具体可以为前述方法实施例中的终端设备或网络设备。
本申请实施例还提供了一种通信系统,该网络系统架构包括上述任一实施例中的终端设备(例如第一终端设备和/或第二终端设备)和网络设备。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统,装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
Claims (48)
- 一种通信方法,其特征在于,所述方法包括:接收第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号;根据所述第一指示信息,发送第一物理上行共享信道PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号,所述第一解调参考信号和所述第二解调参考信号用于进行信道估计。
- 根据权利要求1所述的方法,其特征在于,所述第一指示信息包括:所述第一PUSCH对应的第一信号波形和/或所述第一解调参考信号对应的第一序列,所述第一信号波形和/或所述第一序列,用于确定所述第二解调参考信号的图案;在发送所述第一PUSCH之前,所述方法还包括:根据所述第一信号波形和/或所述第一序列,确定所述第二解调参考信号的图案。
- 根据权利要求2所述的方法,其特征在于,所述根据所述第一信号波形和/或所述第一序列,确定所述第二解调参考信号的图案,包括:根据所述第一信号波形、以及信号波形和图案之间的第一对应关系,确定所述第二解调参考信号的图案,所述第一对应关系至少包括所述第一信号波形和所述第二解调参考信号的图案之间的对应关系;或者,根据所述第一序列、以及序列和图案之间的第二对应关系,确定所述第二解调参考信号的图案,所述第二对应关系至少包括所述第一序列和所述第二解调参考信号的图案之间的对应关系;或者,根据所述第一信号波形、所述第一序列、以及信号波形、序列和图案三者之间的第三对应关系,确定所述第二解调参考信号的图案,所述第三对应关系至少包括所述第一信号波形、所述第一序列和所述第二解调参考信号的图案之间的对应关系。
- 根据权利要求1所述的方法,其特征在于,所述第一指示信息包括:所述第二解调参考信号的图案索引,所述第二解调参考信号的图案索引用于确定所述第二解调参考信号的图案。
- 根据权利要求1所述的方法,其特征在于,所述第一指示信息包括:所述第二解调参考信号所占用的正交频分复用OFDM符号的索引;或者,索引差值,所述索引差值为所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值,所述OFDM符号的索引或者所述索引差值用于指示所述第二解调参考信号的图案。
- 根据权利要求1或5所述的方法,其特征在于,所述第一指示信息包括:所述第二解调参考信号对应的频率资源的位置,其中:若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则所述位置包括:起始频率资源位置和疏分密度;或者,若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则所述位置包括:所述至少一个资源块中每个资源块的起始位置、结束位置以及资源块大小中的至少两项。
- 根据权利要求6所述的方法,其特征在于,若所述第一信号波形为单载波波形,则所述第二解调参考信号对应的频率资源疏分映射在调度带宽上;或者,若所述第一信号波形为多载波波形,则所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,或者,所述第二解调参考信号对应的频率资源疏分映射在调度带宽上。
- 根据权利要求6或7所述的方法,其特征在于,所述至少一个资源块与进行预编码的至少一个预编码子带一一对应。
- 根据权利要求1-8任意一项所述的方法,其特征在于,所述第一解调参考信号,包括:前置解调参考信号,或者,前置解调参考信号以及附加解调参考信号。
- 根据权利要求1-9任意一项所述的方法,其特征在于,所述第一解调参考信号和所述第二解调参考信号是时分的。
- 根据权利要求1-10任意一项所述的方法,其特征在于,所述第二解调参考信号所在的OFDM符号上的非解调参考信号载波位置,用于传递用户数据。
- 一种通信方法,其特征在于,所述方法包括:发送第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号;接收基于所述第一指示信息发送的第一物理上行共享信道PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号,所述第一解调参考信号和所述第二解调参考信号用于进行信道估计。
- 根据权利要求12所述的方法,其特征在于,所述第一指示信息包括:所述第一PUSCH对应的第一信号波形和/或所述第一解调参考信号对应的第一序列,所述第一信号波形和/或所述第一序列,用于确定所述第二解调参考信号的图案。
- 根据权利要求12所述的方法,其特征在于,所述第一指示信息包括:所述第二解调参考信号的图案索引,所述第二解调参考信号的图案索引用于确定所述第二解调参考信号的图案。
- 根据权利要求12所述的方法,其特征在于,所述第一指示信息,包括:所述第二解调参考信号所占用的正交频分复用OFDM符号的索引;或者,索引差值,所述索引差值为所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值,所述OFDM符号的索引或者所述索引差值用于指示所述第二解调参考信号的图案。
- 根据权利要求12或15所述的方法,其特征在于,所述第一指示信息包括:所述第二解调参考信号对应的频率资源的位置,其中:若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则所述位置包括:起始频率资源位置和疏分密度;或者,若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则所述位置包括:所述至少一个资源块中每个资源块的起始位置、结束位置以及资源块的大小中的至少两项。
- 根据权利要求16所述的方法,其特征在于,若所述第一信号波形为单载波波形,则所述第二解调参考信号对应的频率资源疏分映射在调度带宽上;或者,若所述第一信号波形为多载波波形,则所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,或者,所述第二解调参考信号对应的频率资源疏分映射在调度带宽上。
- 根据权利要求16或17所述的方法,其特征在于,所述至少一个资源块与进行预编码的至少一个预编码子带一一对应。
- 根据权利要求12-18任意一项所述的方法,其特征在于,所述第一解调参考信号,包括:前置解调参考信号,或者,前置解调参考信号以及附加解调参考信号。
- 根据权利要求12-19任意一项所述的方法,其特征在于,所述第一解调参考信号和所述第二解调参考信号是时分的。
- 根据权利要求12-20任意一项所述的方法,其特征在于,所述第二解调参考信号所在的OFDM符号上的非解调参考信号载波位置,用于传递用户数据。
- 根据权利要求12-21任意一项所述的方法,其特征在于,所述方法还包括:发送第二指示信息,所述第二指示信息用于指示第三解调参考信号和第四解调参考信号,所述第四解调参考信号为功率为0的零功率解调参考信号,其中:用于发送所述第三解调参考信号的端口号和用于发送所述第一解调参考信号的端口号相同;接收基于所述第二指示信息发送的第二PUSCH,所述第二PUSCH承载所述第三解调参考信号和所述第四解调参考信号,所述第三解调参考信号和所述第四解调参考信号用于进行信道估计;其中:所述第四解调参考信号和所述第二解调参考信号是时分的,和/或,所述第四解调参考信号和所述第二解调参考信号在频率上占用不同的资源块。
- 一种通信装置,其特征在于,包括用于执行如权利要求1至22任一项所述的方法的模块。
- 一种通信装置,其特征在于,包括至少一个处理器,所述至少一个处理器与存储器耦合;所述至少一个处理器用于执行如权利要求1至22中任一项所述的方法。
- 一种可读存储介质,其特征在于,所述存储介质中存储有计算机程序或指令,当所述计算机程序或指令被通信装置执行时,使得所述通信装置实现如权利要求1至22中任一项所述的方法。
- 一种计算机程序产品,其特征在于,所述计算机程序产品包含指令或计算机程序,当所述计算机程序产品在计算机上运行时,使得计算机执行以上权利要求1-22任意一项所述的方法。
- 一种通信装置,其特征在于,所述装置包括:接收单元,用于接收第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号;发送单元,用于根据所述第一指示信息,发送第一物理上行共享信道PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号,所述第一解调参考信号和所述第二解调参考信号用于进行信道估计。
- 根据权利要求27所述的装置,其特征在于,所述第一指示信息包括:所述第一PUSCH对应的第一信号波形和/或所述第一解调参考信号对应的第一序列,所述第一信号波形和/或所述第一序列,用于确定所述第二解调参考信号的图案;所述装置还包括处理单元,用于在发送所述第一PUSCH之前,根据所述第一信号波形和/或所述第一序列,确定所述第二解调参考信号的图案。
- 根据权利要求28所述的装置,其特征在于,所述处理单元,用于:根据所述第一信号波形、以及信号波形和图案之间的第一对应关系,确定所述第二解调参考信号的图案,所述第一对应关系至少包括所述第一信号波形和所述第二解调参考信号的图案之间的对应关系;或者,根据所述第一序列、以及序列和图案之间的第二对应关系,确定所述第二解调参考信号的图案,所述第二对应关系至少包括所述第一序列和所述第二解调参考信号的图案之间的对应关系;或者,根据所述第一信号波形、所述第一序列、以及信号波形、序列和图案三者之间的第三对应关系,确定所述第二解调参考信号的图案,所述第三对应关系至少包括所述第一信号波形、所述第一序列和所述第二解调参考信号的图案之间的对应关系。
- 根据权利要求27所述的装置,其特征在于,所述第一指示信息包括:所述第二解调参考信号的图案索引,所述第二解调参考信号的图案索引用于确定所述第二解调参考信号的图案。
- 根据权利要求27所述的装置,其特征在于,所述第一指示信息包括:所述第二解调参考信号所占用的正交频分复用OFDM符号的索引;或者,索引差值,所述索引差值为所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值,所述OFDM符号的索引或者所述索引差值用于指示所述第二解调参考信号的图案。
- 根据权利要求27或31所述的装置,其特征在于,所述第一指示信息包括:所述第二解调参考信号对应的频率资源的位置,其中:若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则所述位置包括:起始频率资源位置和疏分密度;或者,若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则所述位置包括:所述至少一个资源块中每个资源块的起始位置、结束位置以及资源块大小中的至少两项。
- 根据权利要求32所述的装置,其特征在于,若所述第一信号波形为单载波波形,则所述第二解调参考信号对应的频率资源疏分映射在调度带宽上;或者,若所述第一信号波形为多载波波形,则所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,或者,所述第二解调参考信号对应的频率资源疏分映射在调度带宽上。
- 根据权利要求32或33所述的装置,其特征在于,所述至少一个资源块与进行预编码的至少一个预编码子带一一对应。
- 根据权利要求27-34任意一项所述的装置,其特征在于,所述第一解调参考信号,包括:前置解调参考信号,或者,前置解调参考信号以及附加解调参考信号。
- 根据权利要求27-35任意一项所述的装置,其特征在于,所述第一解调参考信号和所述第二解调参考信号是时分的。
- 根据权利要求27-36任意一项所述的装置,其特征在于,所述第二解调参考信号所在的OFDM符号上的非解调参考信号载波位置,用于传递用户数据。
- 一种通信装置,其特征在于,所述装置包括:发送单元,用于发送第一指示信息,所述第一指示信息用于指示第一解调参考信号和第二解调参考信号,所述第二解调参考信号为功率为0的零功率解调参考信号;接收单元,用于接收基于所述第一指示信息发送的第一物理上行共享信道PUSCH,所述第一PUSCH承载所述第一解调参考信号和所述第二解调参考信号,所述第一解调参考信号和所述第二解调参考信号用于进行信道估计。
- 根据权利要求38所述的装置,其特征在于,所述第一指示信息包括:所述第一PUSCH对应的第一信号波形和/或所述第一解调参考信号对应的第一序列,所述第一信号波形和/或所述第一序列,用于确定所述第二解调参考信号的图案。
- 根据权利要求38所述的装置,其特征在于,所述第一指示信息包括:所述第二解调参考信号的图案索引,所述第二解调参考信号的图案索引用于确定所述第二解调参考信号的图案。
- 根据权利要求38所述的装置,其特征在于,所述第一指示信息,包括:所述第二解调参考信号所占用的正交频分复用OFDM符号的索引;或者,索引差值,所述索引差值为所述第一解调参考信号占用的OFDM符号的索引和所述第二解调参考信号占用的OFDM符号的索引之间的差值,所述OFDM符号的索引或者所述索引差值用于指示所述第二解调参考信号的图案。
- 根据权利要求38或41所述的装置,其特征在于,所述第一指示信息包括:所述第二解调参考信号对应的频率资源的位置,其中:若所述第二解调参考信号对应的频率资源疏分映射在调度带宽上,则所述位置包括:起始频率资源位置和疏分密度;或者,若所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,则所述位置包括:所述至少一个资源块中每个资源块的起始位置、结束位置以及资源块的大小中的至少两项。
- 根据权利要求42所述的装置,其特征在于,若所述第一信号波形为单载波波形,则所述第二解调参考信号对应的频率资源疏分映射在调度带宽上;或者,若所述第一信号波形为多载波波形,则所述第二解调参考信号对应的频率资源占据所述调度带宽上的至少一个资源块,或者,所述第二解调参考信号对应的频率资源疏分映射在调度带宽上。
- 根据权利要求42或43所述的装置,其特征在于,所述至少一个资源块与进行预编码的至少一个预编码子带一一对应。
- 根据权利要求38-44任意一项所述的装置,其特征在于,所述第一解调参考信号,包括:前置解调参考信号,或者,前置解调参考信号以及附加解调参考信号。
- 根据权利要求38-45任意一项所述的装置,其特征在于,所述第一解调参考信号和所述第二解调参考信号是时分的。
- 根据权利要求38-46任意一项所述的装置,其特征在于,所述第二解调参考信号所在的OFDM符号上的非解调参考信号载波位置,用于传递用户数据。
- 根据权利要求38-47任意一项所述的装置,其特征在于,所述发送单元,还用于发送第二指示信息,所述第二指示信息用于指示第三解调参考信号和第四解调参考信号,所述第四解调参考信号为功率为0的零功率解调参考信号,其中:用于发送所述第三解调参考信号的端口号和用于发送所述第一解调参考信号的端口号相同;所述接收单元,还用于接收基于所述第二指示信息发送的第二PUSCH,所述第二PUSCH承载所述第三解调参考信号和所述第四解调参考信号,所述第三解调参考信号和所述第四解调参考信号用于进行信道估计;其中:所述第四解调参考信号和所述第二解调参考信号是时分的,和/或,所述第四解调参考信号和所述第二解调参考信号在频率上占用不同的资源块。
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| US20170257177A1 (en) * | 2014-10-17 | 2017-09-07 | Lg Electronics Inc. | Method for measuring inter-device interference in wireless communication system supporting fdr transmission, and apparatus therefor |
| WO2018214149A1 (zh) * | 2017-05-26 | 2018-11-29 | Oppo广东移动通信有限公司 | 上行信号的传输方法及终端、网络设备 |
| US20230107305A1 (en) * | 2020-05-13 | 2023-04-06 | Qualcomm Incorporated | Dynamically adding additional demodulation reference signal (a-dmrs) for pusch |
| US20230179362A1 (en) * | 2020-08-01 | 2023-06-08 | Huawei Technologies Co., Ltd. | Uplink transmission method and related apparatus |
| WO2024045102A1 (zh) * | 2022-08-31 | 2024-03-07 | 华为技术有限公司 | 通信方法及装置 |
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| US20170257177A1 (en) * | 2014-10-17 | 2017-09-07 | Lg Electronics Inc. | Method for measuring inter-device interference in wireless communication system supporting fdr transmission, and apparatus therefor |
| WO2018214149A1 (zh) * | 2017-05-26 | 2018-11-29 | Oppo广东移动通信有限公司 | 上行信号的传输方法及终端、网络设备 |
| US20230107305A1 (en) * | 2020-05-13 | 2023-04-06 | Qualcomm Incorporated | Dynamically adding additional demodulation reference signal (a-dmrs) for pusch |
| US20230179362A1 (en) * | 2020-08-01 | 2023-06-08 | Huawei Technologies Co., Ltd. | Uplink transmission method and related apparatus |
| WO2024045102A1 (zh) * | 2022-08-31 | 2024-03-07 | 华为技术有限公司 | 通信方法及装置 |
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