WO2020063464A1 - Procédé de traitement dmrs, appareil, système, dispositif, terminal et support d'informations - Google Patents

Procédé de traitement dmrs, appareil, système, dispositif, terminal et support d'informations Download PDF

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Publication number
WO2020063464A1
WO2020063464A1 PCT/CN2019/106894 CN2019106894W WO2020063464A1 WO 2020063464 A1 WO2020063464 A1 WO 2020063464A1 CN 2019106894 W CN2019106894 W CN 2019106894W WO 2020063464 A1 WO2020063464 A1 WO 2020063464A1
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Prior art keywords
reference signal
demodulation reference
port
ports
type
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PCT/CN2019/106894
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English (en)
Chinese (zh)
Inventor
梅猛
卢有雄
杨瑾
毕峰
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中兴通讯股份有限公司
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    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the present disclosure relates to the field of communication technologies, for example, to a method, a device, a system, a device, a terminal, and a storage medium for processing a demodulation reference signal (DMRS).
  • DMRS demodulation reference signal
  • V2X Vehicle to Everything
  • more demodulation reference signals are needed to demodulate the data channel during the high-speed movement of the vehicle, which requires a lot of Time-Frequency Resource Element (RE).
  • RE Time-Frequency Resource Element
  • Embodiments of the present invention provide a demodulation reference signal (Demodulation Reference Signal, DMRS) processing method, device, system, device, terminal, and storage medium.
  • DMRS Demodulation Reference Signal
  • An embodiment of the present invention provides a demodulation reference signal processing method, including:
  • the physical resources to be configured include channel resources of a first type and channel resources of a second type;
  • M first demodulation reference signal ports are configured for the first type of channel resources, and N second demodulation reference signal ports are configured for the second type of channel resources; the first demodulation reference signals are used for the first Demodulation of a channel-like resource, a second demodulation reference signal is used for demodulation of the channel resource of the second type, and at least one of the M first demodulation reference signal ports and the N second solution There is an association relationship between at least one of the tuning reference signal ports, and both M and N are positive integers.
  • An embodiment of the present invention further provides a demodulation reference signal processing method, including:
  • An embodiment of the present invention provides a demodulation reference signal processing method, including:
  • the first communication node acquires physical resources to be configured, where the physical resources to be configured include first-type channel resources and second-type channel resources;
  • the first communication node configures M first demodulation reference signal ports for the first type of channel resources, and configures N second demodulation reference signal ports for the second type of channel resources, the first demodulation A reference signal is used for demodulation of the first type of channel resources, a second demodulation reference signal is used for demodulation of the second type of channel resources, and at least one of the M first demodulation reference signal ports Has an association relationship with at least one of the N second demodulation reference signal ports, and both M and N are positive integers;
  • the first communication node forms a configured physical resource, and sends the configured physical resource to a second communication node;
  • the second communication node extracts each first demodulation reference signal and each second demodulation reference signal in the configured physical resources, and the first demodulation reference signal and the second demodulation reference signal Related relationship
  • An embodiment of the present invention further provides a demodulation reference signal processing apparatus, including:
  • An acquisition module configured to acquire physical resources to be configured, where the physical resources to be configured include channel resources of a first type and channel resources of a second type;
  • the configuration module is configured to configure M first demodulation reference signal ports for the first type of channel resources, and configure N second demodulation reference signal ports for the second type of channel resources, and the first demodulation reference signal Signals for demodulation of the first type of channel resources, second demodulation reference signals for demodulation of the second type of channel resources, and at least one of the M first demodulation reference signal ports and At least one of the N second demodulation reference signal ports has an association relationship, and both M and N are positive integers.
  • An embodiment of the present invention further provides a demodulation reference signal processing apparatus, including:
  • a receiving module configured to receive a configured physical resource sent by a first communication node
  • An extraction module configured to extract each first demodulation reference signal and each second demodulation reference signal in the configured physical resource, and connection relation;
  • a demodulation module configured to demodulate the first type of channel resources according to each of the first demodulation reference signals, demodulate the second type of channel resources according to each of the second demodulation reference signals, and An association relationship between the first demodulation reference signal and the second demodulation reference signal, and performing auxiliary demodulation on the first type of channel resource through the second demodulation reference signal.
  • An embodiment of the present invention further provides a demodulation reference signal processing system, including:
  • An embodiment of the present invention further provides a device, including:
  • a first processor a first memory, and a first communication bus
  • the first communication bus is configured to implement connection and communication between the first processor and the first memory
  • the first processor is configured to execute at least one computer program stored in the first memory to implement The demodulation reference signal processing method described above.
  • An embodiment of the present invention further provides a terminal, including:
  • a second processor a second memory, and a second communication bus
  • the second communication bus is configured to implement connection and communication between the second processor and the second memory, and the second processor is configured to execute at least one computer program stored in the second memory to implement The demodulation reference signal processing method described above.
  • An embodiment of the present invention further provides a storage medium, where the storage medium stores at least one computer program, and the at least one computer program can be executed by at least one processor, so as to implement the first type or the second type.
  • the demodulation reference signal processing method is not limited to:
  • the physical resources to be configured include first-type channel resources and second-type channel resources; Channel resources are configured with M first demodulation reference signal ports, and N second demodulation reference signal ports are configured for the second type of channel resources; the first demodulation reference signal is used for demodulation of the first type of channel resources, and the second solution
  • the modulation reference signal is used for demodulation of the second type of channel resources, and at least one of the M first demodulation reference signal ports is associated with at least one of the N second demodulation reference signal ports, and M and N Both are positive integers.
  • the second demodulation reference signal can be used to implement Demodulation of channel resources, which is equivalent to the second demodulation reference signal can be used to demodulate the second type of channel resources or demodulate the first type of channel resources without increasing the first type of channel resources
  • the accuracy of demodulation of the first type of channel resources is effectively improved.
  • the above technical effects including but not limited to the above can be achieved.
  • FIG. 1 is a schematic flowchart of a demodulation reference signal processing method according to the first embodiment
  • FIG. 2 is a schematic diagram of a demodulation reference signal configuration provided in the second embodiment
  • FIG. 3 is a schematic diagram of a demodulation reference signal configuration according to a third embodiment
  • FIG. 4 is a schematic diagram of a demodulation reference signal configuration according to a fourth embodiment
  • FIG. 5 is a schematic diagram of a demodulation reference signal configuration provided in Embodiment 5;
  • FIG. 6 is a schematic diagram of a demodulation reference signal configuration provided in Embodiment 6;
  • Embodiment 7 is a schematic diagram of a demodulation reference signal configuration provided in Embodiment 7;
  • FIG. 8 is a schematic diagram of a demodulation reference signal configuration according to the eighth embodiment.
  • FIG. 9 is a schematic diagram of a demodulation reference signal configuration according to a ninth embodiment.
  • FIG. 10 is a schematic flowchart of a demodulation reference signal processing method according to Embodiment 10;
  • FIG. 11 is a schematic flowchart of a demodulation reference signal processing method according to Embodiment 11;
  • FIG. 12 is a schematic structural diagram of a demodulation reference signal device according to a twelfth embodiment
  • FIG. 13 is a schematic structural diagram of a demodulation reference signal device according to Embodiment 13;
  • FIG. 14 is a schematic structural diagram of a demodulation reference signal system according to a fourteenth embodiment
  • Embodiment 15 is a schematic structural diagram of a device according to Embodiment 15;
  • FIG. 16 is a schematic structural diagram of a terminal according to Embodiment 16.
  • the configuration of demodulation reference signals is flexible, and the configuration of demodulation reference signals may be different in different scenarios.
  • the configuration of the demodulation reference signal in the data channel may be in a configuration of a transmission subframe or a non-subframe structure, and the number of time domain symbols occupied is less.
  • more time-domain symbols may be needed to send demodulation reference signals in the data channel to effectively reduce the problem of insufficient precision of demodulation due to high-speed movement, but this will cause demodulation reference Increased signal overhead.
  • an embodiment of the present invention provides a demodulation reference signal processing method, which improves the accuracy of channel demodulation while ensuring that the overhead of the demodulation reference signal is not increased.
  • the demodulation reference signal processing method mainly includes the following steps.
  • S102 Configure M first demodulation reference signal ports for the first type of channel resources, and configure N second demodulation reference signal ports for the second type of channel resources.
  • a first demodulation reference signal is used for demodulation of the first type of channel resources
  • a second demodulation reference signal is used for demodulation of the second type of channel resources
  • the M first demodulation reference signal ports At least one of them has an association relationship with at least one port in the N second demodulation reference signals, and both M and N are positive integers.
  • the physical resources to be configured include a resource block (RB) and an allocated bandwidth.
  • RB resource block
  • the first type of channel resources includes time-frequency domain resources where the data channel is located
  • the second type of channel resources includes time-frequency domain resources where the control channel is located.
  • the control channel includes a physical direct link control channel (Physical Sidelink Control Channel, PSCCH), a physical layer uplink control channel (PUCCH), a physical layer downlink control channel (Physical Downlink Control Channel, PDCCH), and the like.
  • the data channel includes a physical direct link shared channel (PSSCH), a physical uplink shared channel (PUSCH), and a physical downlink shared channel (PDSCH).
  • the first demodulation reference signal is used to demodulate the data channel.
  • the demodulation reference signal is a demodulation reference signal for demodulating the control channel.
  • M is greater than or equal to 0
  • N is greater than or equal to 0 and they are all integers.
  • M 1, 2, 3, ...
  • N 1, 2, 3, 4, ....
  • the configuration M is equal to N, that is, the number of the first demodulation reference signal port is equal to the number of the second demodulation reference signal port.
  • association relationship between the first demodulation reference signal port and the second demodulation reference signal port.
  • the association relationship includes at least one of the following: Quasi Co-Located (QCL), the same sequence, the same precoding matrix, and the same Orthogonal Cover Code (OCC).
  • QCL Quasi Co-Located
  • OCC Orthogonal Cover Code
  • the first demodulation reference signal port and the second demodulation reference signal port have a quasi-co-location, it means that the first demodulation reference signal port and the second demodulation reference signal port have an associated relationship; or the first demodulation reference signal port is configured;
  • the reference signal port has the same sequence as the second demodulation reference signal port.
  • the demodulation reference signal ports have the same precoding matrix, which can also indicate that the first demodulation reference signal port is related to the second demodulation reference signal port; or the first demodulation reference signal port and the second demodulation reference signal are configured.
  • the ports have the same OCC, which may also indicate that the first demodulation reference signal port and the second demodulation reference signal port have an associated relationship.
  • the same sequence of the first demodulation reference signal port and the second demodulation reference signal port may also be expressed as that the associated port sequence is intercepted or generated in the same way, or the base sequence is the same, or the first demodulation reference signal port is considered
  • the sequence is a continuation of the second demodulation reference signal on the subcarrier where the first demodulation reference signal is located.
  • the association relationship may be indicated by indication information, and the indication information includes at least one of the following: a quasi-co-location relationship between the first demodulation reference signal port and the second demodulation reference signal port, and a sounding reference signal resource identifier ( Sounding reference signal resource indicator (SRI), transmission precoding matrix identifier (Transmission precoding matrix indicator, TPMI).
  • SRI Sounding reference signal resource indicator
  • TPMI transmission precoding matrix indicator
  • first demodulation reference signal ports Take the configuration of two first demodulation reference signal ports and two second demodulation reference signal ports as an example.
  • the two first demodulation reference signal ports are port 1,0 and port 1,1 , respectively.
  • the second demodulation reference signal ports are port 2,0 and port 2,1 , respectively.
  • the first demodulation reference signal port port 1,0 and the second demodulation reference signal port port 2,0 have an associated relationship, and the two have a quasi-co-location relationship.
  • the first demodulation reference signal port port 1 can also be configured.
  • , 1 is associated with the second demodulation reference signal port port 2,1 , and the two have a quasi-co-location relationship.
  • the first demodulation reference signal port P 1, i and the second demodulation reference signal port P 2, j have an association relationship, that is, one of the demodulation reference signals (first The demodulation reference signal port P 1, i ) is associated with one of the demodulation reference signals (the second demodulation reference signal port P 2, j ) of the second type of channel resources.
  • the default configuration is that i is equal to the j, that is, two default demodulation reference signals (i.e., one of the first demodulation reference signal port and one of the second demodulation reference signal with the same port identifier (i and j)) are configured by default. Reference signal port).
  • multiple ports of the first demodulation reference signal are configured as frequency division multiplexing or code division multiplexing.
  • multiple ports of the second demodulation reference signal are configured as frequency division multiplexing or code division multiplexing.
  • the indication information is used to indicate that the enabling relationship between the first demodulation reference signal port and the second demodulation reference signal port is configured at a time domain symbol position, and the indication information includes at least one of the following: first demodulation The quasi-co-location relationship between the reference signal port and the second demodulation reference signal port, high-level signaling, and dynamic signaling.
  • the first demodulation reference signal and the second demodulation reference signal are identified using the same transmission precoding matrix.
  • the enabling relationship refers to the existence of whether to support the configuration of two DMRSs on the same time domain symbol.
  • OFDM Orthogonal Frequency Division Multiplexing
  • At least one first demodulation reference signal port is configured to be located in a second type of channel resource.
  • the vacant resources in the second type of channel resources are effectively used, the resource utilization rate is improved, and the demodulation accuracy of the first type of channel resources is improved.
  • At least one first demodulation reference signal port may be configured and located at a corresponding frequency domain position on a time domain symbol where the second demodulation reference signal is located in the second type of channel resource. Alignment of demodulation reference signals in the second type of frequency domain resources.
  • the first demodulation reference signal port in the second type of channel resource is selected based on the frequency domain bandwidth of the second type of channel resource.
  • the sequence generation method of the first demodulation reference signal port in the second type of channel resource is the same as the sequence generation method of the second demodulation reference signal port.
  • At least one first demodulation reference signal port configured in the first type of channel resource is configured, and the at least one first demodulation reference signal port located in the first type of channel resource is based on the first type of channel resource. Frequency-domain bandwidth to select at least one first demodulation reference signal port sequence.
  • the current movement rate of the second communication node is obtained, and it is determined that the current movement rate is greater than a preset movement rate.
  • the second communication node is also a communication node serving as a receiving end, including, but not limited to, a vehicle terminal, a user terminal, a roadside device, and a base station.
  • the configured physical resources are formed, and the configured physical resources are sent to the second communication node.
  • the control channel In the current physical layer structure of the NR, the control channel usually occupies only a part of the frequency domain position on the time-domain symbol bit.
  • the time-frequency domain resources of the scheduling data service that can be used by vehicle networking (V2X) are relatively more It is an effective method to improve the frequency domain efficiency of the system by supporting control channel and data channel frequency division multiplexing. At this time, in order to accurately demodulate the frequency division multiplexed data, it is used to demodulate the data channel solution. Tuning the reference signal requires a new configuration.
  • the sidelink communication mainly uses the uplink physical layer structure.
  • the control channel usually does not occupy the entire allocated bandwidth in the time domain symbol position.
  • flexible demodulation reference signal configuration is supported in the NR system. With this flexible demodulation reference signal configuration, in addition to meeting different mobile speed requirements, it can also maximize spectrum efficiency. .
  • the embodiments of the present invention mainly use vacant time-frequency resources for data service transmission, for example, use unused frequency-domain resources on the time-domain symbol bit of the control channel for data service transmission.
  • vacant time-frequency resources for data service transmission for example, use unused frequency-domain resources on the time-domain symbol bit of the control channel for data service transmission.
  • M is equal to 1
  • N is equal to 1
  • one port of the first demodulation reference signal and one port of the second demodulation reference signal are frequency division multiplexed
  • the port of the first demodulation reference signal and the second demodulation reference signal are The port for demodulating the reference signal has an associated relationship. That is, the DMRS of the data channel is configured as a single port, and the DMRS of the control channel is also configured as a single port.
  • the first communication node indicates the parameter configuration of the demodulation reference signal in the data channel through a Quasi Co-Located (QCL) relationship between the control channel and the data channel, where the parameters of the demodulation reference signal include at least one of the following: port Number, association with the control channel demodulation reference signal port, sequence, frequency domain resource location, and precoding mode.
  • QCL Quasi Co-Located
  • the control channel and the data channel have frequency division multiplexing, and a demodulation reference signal for data channel demodulation is configured on the vacant frequency domain resources of the time-domain symbol bit where the control channel is located.
  • the control channel occupies the 3rd, 4th, and 5th time-domain symbol bits at this time.
  • the control channel only occupies part of the frequency-domain position (the upper eight subcarriers on the ordinate in Figure 1). ), In order to improve resource utilization, other frequency domain locations are configured to transmit data services.
  • the first communication node configures demodulation reference signal information of the control channel, and indicates the related configuration of some or all demodulation reference signals in the data channel through a QCL relationship. If both the demodulation reference signal of the control channel and the data channel are configured with one port, as shown in Figure 2, at this time, the data channel is also configured on the time-domain symbol bit occupied by the control channel (3rd, 4th, and 5th). Four subcarriers below the ordinate of the time-domain symbol bit). For the accuracy of data channel demodulation, a demodulation reference signal for data demodulation is also configured.
  • the demodulation of the data service can be performed through the estimation result of the demodulation reference signal of the control channel. Then the precoding of the demodulation reference signal of the control channel and the precoding of the data channel are the same.
  • M is equal to 2
  • N is equal to 1
  • two ports of the first demodulation reference signal are frequency division multiplexed
  • one of the two ports of the first demodulation reference signal and the second demodulation reference signal There is an association relationship between one of the ports. That is, two ports of the data channel DRMS and a single port of the DMRS of the control channel.
  • the DMRS of the data channel is frequency division multiplexed.
  • the first communication node configures two demodulation reference signal ports in the first type of channel resources and one demodulation reference signal port in the second type of channel resources, where the two demodulation reference signal ports in the first type of channel resources and the One demodulation reference signal port in the second-type channel resource occupies the same time domain resource.
  • the control channel uses a single-port demodulation reference signal configuration, and the data channel uses a multi-port demodulation reference signal configuration. Taking the data channel in FIG. 3 as an example, two demodulation reference signal ports are configured. At this time, the control channel is configured with one demodulation reference signal port port 2,0 , and the data channel is configured with two ports port 1,0 and port 1,1 . Part of the bandwidth of the time-domain symbol position of the control channel is used to send data services. In order to ensure the accuracy of the data channel demodulation, according to the current user (including the receiving end) moving speed, On the domain symbol, a demodulation reference signal for data demodulation is configured. The default time domain position is the time domain position of the demodulation reference signal in the control channel.
  • the control channel DMRS and the data channel DMRS have a quasi co-location (QCL) relationship. Then, the DMRS in the control channel can be used to assist the demodulation of the data channel. This ensures the demodulation accuracy of the data channel. In this case, the overhead of the reference signal in the data channel can be reduced.
  • the DMRS port port 2,0 in the control channel needs to be associated with One DMRS port in the data channel, port 1,0 or port 1,1 . For example, by default, the control channel port port 2,0 and the lowest identified DMRS port port 1,0 in the data channel have an association relationship, and the two have the same precoding information.
  • the DMRS port port 1,1 of the data channel is not associated with the DMRS port in the control channel, and the data channel DMRS port port 1,1 can be sent on the scheduled bandwidth.
  • the control channel DMRS port port 2,0 and the associated The DMRS port port 1,0 of the data channel needs the same physical resource location configuration rule at the same time domain symbol position.
  • the rule mainly refers to the same multiplexing mode of the two DMRS port configurations and the configuration of occupied frequency domain resources.
  • the first communication node needs to be used to indicate that control channel related information and signals are not configured in the control channel, that is, unused physical resource locations.
  • the DMRS port 1,0 and port 1,1 in the data channel are frequency division multiplexed. If the control channel and the data channel have the same time-frequency domain resource configuration rules, the time of the DMRS port port 1,1 is Frequency domain resources can occupy the entire allocated bandwidth, including some frequency domain resources on the time domain symbol where the control channel is located. As shown in FIG. 3, the data channel DMRS port port 1,1 is also transmitted in the time domain symbol bit (the fourth time domain symbol) where the DMRS is located in the control channel.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the embodiment of the present invention is different from the above embodiment 3 in the pattern. Because the DMRS has a configurable time-frequency domain pattern, even for different DMRS patterns, if two DMRS ports of the data channel are frequency division multiplexed Yes, then the above method is also applicable. Take Figure 4 as an example. At this time, the DMRS pattern of the data channel is type 2 in NR. If the two DMRS ports are frequency division multiplexed, they can be configured as DMRS port port 1,0 and DMRS port port 1,2. Among them, the DMRS port port 1,0 and the control channel DMRS port port 2,0 are associated, and the data channel DMRS port port 1,2 occupies part of the time-frequency domain resources of the control channel.
  • the DMRS ports of the two data channels are frequency division, and the data channel DMRS ports that are not associated with the control channel DMRS port, that is, the DMRS port port 1 in Figure 3 1, and DMRS ports port 1,2 in FIG. 4, at this time, the DMRS sequences of both are generated within the entire allocated bandwidth.
  • the occupied bandwidth of the DMRS port port 1,0 of the data channel is different from the bandwidth of the above two ports, so the DMRS port port 1
  • the sequence of 0 is different from other DMRS ports in the same sign bit, that is, DMRS port port 1, 1 in FIG. 3 and DMRS port port 1,2 in FIG. 4.
  • the first communication node indicates that the enabling relationship between the first demodulation reference signal and the second demodulation reference signal is configured at a time-domain symbol position, and the indication information is at least one of the following: the first demodulation reference signal port and The quasi-co-location relationship of the second demodulation reference signal, high-level signaling, and dynamic signaling.
  • a demodulation reference signal for demodulating the data channel can be configured on the time-domain symbol of the frequency division multiplexing of the data channel and the control channel.
  • the first communication node can indicate whether it is in the same time domain through high-level signaling, such as radio resource control (RRC) signaling, media access control unit (MAC, CE) signaling.
  • RRC radio resource control
  • MAC media access control unit
  • CE media access control unit
  • the first communication node uses the quasi-co-location relationship between the control channel demodulation reference signal port and the data channel demodulation reference signal port to indicate that the data channel demodulation reference signal port is in the time domain of frequency division multiplexing with the control channel demodulation reference signal port. Enable relationship of symbol position. That is, if there is a QCL relationship between the two, a demodulation reference signal for demodulating the data channel can be configured on the time-domain symbol of the frequency division multiplexing of the data channel and the control channel.
  • the first communication node indicates the enabling relationship of the data channel demodulation reference signal port in the time domain symbol position of the frequency division multiplexing with the control channel through signaling.
  • the signaling may be high-level signaling or dynamic signaling, in which dynamic signaling Including Direct Link Control Information (SCI) and Downlink Control Information (DCI).
  • SCI Direct Link Control Information
  • DCI Downlink Control Information
  • the first communication node instructs the data channel demodulation reference signal port in the time-frequency domain resource where the control channel is located through signaling, that is, configures part or all of the demodulation reference at the time-frequency domain resource position occupied by the control channel. signal.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • M is equal to 2
  • N is equal to 1
  • two ports of the first demodulation reference signal are code division multiplexing, and one of the two ports of the first demodulation reference signal and the second demodulation reference signal
  • One port of is configured as code division multiplexing
  • the port of the second demodulation reference signal has an association relationship with the other port of the two ports of the first demodulation reference signal. That is, one port of the first demodulation reference signal is not associated with a port of the second demodulation reference signal.
  • It is equivalent to two ports of data channel DRMS and a single port of control channel DMRS.
  • the DMRS of the data channel is code division multiplexed.
  • the control channel is configured with one DMRS port, and the data channel is configured with multiple DMRS ports. And at this time, there is a frequency domain orthogonal cover code (OCC) between the DMRS ports of the data channel.
  • OCC orthogonal cover code
  • the DMRS port port 1,0 and the DMRS port port 1,1 of the data channel are present in the frequency domain OCC.
  • the port port 1,0 uses an orthogonal code [1,1]
  • port 1,1 is demodulated with [1, -1].
  • the control channel DMRS port port 2,0 and the data channel DMRS port port 1,0 have an association relationship, or they are associated by using the OCC.
  • One port of DMRS is configured in the control channel, but the DMRS port port port 2,0 also uses the frequency domain OCC of [1,1] for demodulation.
  • the DMRS port port 1,0 and port 1,1 of the data channel occupy the same time-frequency domain resources, and the mapping rules of the control channel DMRS and the data channel DMRS are the same, the DMRS port of the control channel and The association relationship of the DMRS ports of the data channel can also be indicated by the frequency domain OCC, that is, the DMRS port of the associated control channel and the DMRS port of the data channel have the same OCC.
  • the DMRS port port 1,0 in the data channel and the DMRS port port 2 and 0 in the control channel have a QCL relationship. The two are related.
  • the channel estimation result of the control channel can be used to assist in demodulating the DMRS port of the data channel. port 1,0 .
  • the data channel DMRS port port 1,1 needs to be configured in the frequency domain range where the time channel symbol position of the control channel is used to send data services (for example, the 3-5 time domain in Figure 5).
  • the lower 4 subcarriers of the symbol can also be configured into the control channel (for example, the upper 8 subcarriers of the 3-5th time domain symbol in FIG. 5).
  • the DMRS port 1,0 and port 1,1 of the data channel have the OCC function. Both occupy the same time-frequency resources, and the data channel demodulation reference signal port 1,0 and the control channel demodulation reference signal.
  • the physical resource mapping rules for port port 2,0 are the same.
  • the data channel DMRS port port 1,1 is mapped into the control channel, and the control channel port 2,0 and the data channel port 1,1 occupy the same time. Frequency resources, as shown in Figure 5.
  • the interference of the data channel DMRS port port 1,1 on the control channel must be completely removed during the control channel demodulation.
  • the DMRS port port 2,0 of the control channel uses OCC of [1,1]
  • the DMRS port port 1,1 of the data channel uses OCC of [1, -1].
  • the Adding the subcarriers demodulated by OCC can remove the influence of the data channel DMRS port port 1,1 on the control channel.
  • the control channel DMRS needs to be demodulated once. The effect of port 2,0 on the data channel ensures the demodulation effect of the data channel DMSR port port 1,1 .
  • the DMRS port port 1,0 and port 1,1 of the data channel are generated in the same sequence as the control channel DMRS port port 2,0 .
  • the DMRS of the frequency channel position of the data channel at the time-domain symbol position of the control channel (for example, the lower four subcarriers of the 3-5 time-domain symbol in Figure 5) is generated according to the DMRS sequence of the data channel, and the frequency domain of the control channel is located
  • the sequence of the DMRS port port 1,1 at the position (for example, the upper eight subcarriers of the 3-5th time-domain symbol in FIG. 5) is sequence generated according to the sequence generation rule of the control channel. That is, the DMRS port port port 1,1 in the fourth time domain symbol position in FIG. 5 is in the frequency domain position of the control channel (the eight subcarriers above the fourth time domain symbol) and the frequency domain position of the data channel (the fourth The sequence generation method of the lower 4 subcarriers of the time domain symbol is different.
  • the two sequence generation methods described above can be used when the system is configured as an OFDM waveform, which does not affect the use of OCC.
  • the data channel DMRS ports port 0,1 and port 1,1 are modulated using OCC, so the two ports need to be the same when generating the DMRS sequence.
  • the number of RBs in the frequency domain can ensure the characteristics of the OCC.
  • the DMRS port 1,0 and port 1,1 of the data channel occupy different frequency domain resource positions, in order to ensure the data channel between the two DMRS ports, OCC function, so in the single carrier waveform, only through the above method 2, can ensure that in the frequency domain of the data channel, two DMRS ports can use OCC for modulation and demodulation.
  • the sequence of DMRS port port 1,1 in the frequency domain of the control channel is the same as that of control channel port port 2,0 , so when demodulating the control channel, the data channel DMRS port port 1,1 can be eliminated by the characteristics of the OCC.
  • the control channel port 2,0 can be used to assist the demodulation of the data channel DMRS port 1,1 according to the OCC characteristics.
  • control channel DMRS port port 2,0 can be used to demodulate the data channel DMRS port port 1,0
  • the OCC feature can be used to assist the demodulation of the data channel DMRS port port 1,1 .
  • Embodiment 6 is a diagrammatic representation of Embodiment 6
  • M is equal to 6
  • N is equal to 1
  • the data channel DMRS is multi-port
  • the control channel DMRS is a single port.
  • the control channel DMRS port For the DMRS multi-port data channel, if there is a control channel for the corresponding port, then you can configure the association between the control channel DMRS port and each DMRS port of the data channel, that is, the channel estimation result of the control channel DMRS port can be used DMRS port to assist in demodulating the data channel.
  • the DMRS port 1,2 , port 1,3 , and ports port 1,4 , port 1,5 , and the control channel DMRS port port 2,0 is frequency division multiplexed, the ports of these data channels Configured to the frequency domain location where the control channel is located, the DMRS sequence and other time domain symbol locations are generated according to the entire allocated bandwidth.
  • the DMRS port 1,0 and port 1,1 of the data channel can also be configured in the same sequence for OCC multiplexing.
  • the bandwidth in the DMRS sequence generation of the data channel at the fourth time-domain symbol position The parameters are intercepted according to the data bandwidth scheduled by the current symbol, and the sequence generation and interception of the data channel DRMS port port 1, 1 in the symbol part of the time domain where the control channel is located is configured according to the sequence generation and interception of the control channel. Therefore, the sequence generation and interception method of the DMRS port of the data channel on the time-domain symbol of the frequency division multiplexing of the control channel and the data channel may be different. As shown in FIG.
  • the DMRS sequence, the sequence of port port 1,0 and port 1,1 are the same, the sequence generation and interception of port port 1,2 , port 1,3 and port 1,4 , port 1,5 are the same, But the sequence generation and interception rules of port port 1,0 , port 1,1 and other ports are different.
  • Embodiment 7 is a diagrammatic representation of Embodiment 7:
  • M is equal to 2
  • N is equal to 2
  • two ports of the first demodulation reference signal are frequency division multiplexing
  • two ports of the second demodulation reference signal are frequency division multiplexing
  • the first demodulation reference signal is One of the ports is associated with one of the ports of the second demodulation reference signal
  • the other port of the first demodulation reference signal is associated with the other port of the second demodulation reference signal.
  • the number of DMRS ports configured on the control channel and the data channel is usually different, so at this time, the estimation results of the DMRS in the control channel cannot be used to estimate each layer of the entire data channel.
  • Channel Take the DMRS two-port data channel as an example.
  • the control channel supports the design of the two-port demodulation reference signal.
  • the multiplexing method of the demodulation reference signals of the control channel and the data channel is the same between different ports.
  • the association relationship between the ports of the control channel and the data channel is also the same.
  • control 1,0 demodulation reference signal is a demodulation reference signal port pORT port port channel 2,0 and associated data channel
  • a control channel demodulation reference signal port pORT 2,1 data channel demodulation reference signal port port 1 , 1 is associated, as shown in Figure 7.
  • SRI sounding reference signal resource indicator
  • TRI transmission precoding matrix
  • TPMI transmission precoding matrix
  • the first communication node may also indicate the association relationship between the DMRS port of the control channel and the data channel through signaling, where the signaling includes at least one of the following: high-level signaling, dynamic signaling.
  • Embodiment 8 is a diagrammatic representation of Embodiment 8
  • M is equal to 2 and N is equal to 2.
  • the two ports of the first demodulation reference signal are code division multiplexing, and the two ports of the second demodulation reference signal are also code division multiplexing.
  • the first demodulation reference is One port of the signal is associated with one port of the second demodulation reference signal, and the other port of the first demodulation reference signal is associated with the other port of the second demodulation reference signal.
  • the data channel is configured with DMRS ports port 1,0 and port 1,1 , and these two ports occupy the same time-frequency resources, and are demodulated by orthogonal code OCC , As shown in Figure 8.
  • the two ports of the control channel and the data channel respectively have a QCL relationship, and the two ports of the control channel support frequency domain OCC.
  • port 2,0 of the control channel is associated with DMRS port port 1,0 of the data channel
  • DMRS port of port 2,1 of the control channel is associated with DMRS port of port 1,1 of the data channel.
  • the SRI or TPMI of each port is used to indicate the association between the DMRS port of the control channel and the DMRS port of the data channel.
  • M is equal to 2
  • N is equal to 2
  • the two ports of the first demodulation reference signal are code division multiplexed
  • the two ports of the second demodulation reference signal are configured as frequency division multiplexing
  • one second The load of the demodulation reference signal port is used to send information of the two ports of the second demodulation reference signal
  • one of the ports of the first demodulation reference signal is associated with one of the ports of the second demodulation reference signal.
  • Another port of the demodulation reference signal is associated with another port of the second demodulation reference signal.
  • Multi-port DMRS control channel is configured, and the load of the physical resource location is one DMRS physical resource.
  • Different DMRSs occupy different frequency domain resources for transmission. Taking the physical resource corresponding to a DMRS port as four subcarriers as an example, if two ports of the control channel DMRS are configured, the two DMRS ports share the four subcarrier resources.
  • one of the two DMRS ports corresponds to the first two subcarriers, and the other port corresponds to the last two subcarriers.
  • the physical resources are flexibly configured according to the information to be sent by the port, and the configuration is indicated by high-level signaling or dynamic signaling.
  • a two-port control channel DMRS is designed, and the frequency-domain resource position occupied on the same time-domain symbol bit is the resource position of port port 2,0 .
  • the data channel is two DMRS ports, and it can be seen from FIG. 9 that the two ports port 1,0 and port 1,1 adopt the frequency domain OCC multiplexing method.
  • two DMRS ports are also configured. Different DMRS ports in the control channel use frequency division multiplexing, and the load of its physical resources is the load of one port.
  • a DMRS port of the control channel is port 2,0 , which is originally configured. 4 subcarrier positions, then the load of the DMRS in the control channel is 4 subcarriers.
  • the time-frequency domain position configuration of its frequency domain position is compared with the physical resource configuration of the DMRS port port 1,0 in the data channel.
  • DMRS port configurations in the control channel If there are multiple DMRS port configurations in the control channel. DMRS of multiple ports are transmitted on one DMRS payload.
  • the DMRS port port 2 in the control channel occupies part of the time-frequency domain resources, and the DMRS port port 2,1 occupies part of the time-frequency domain resource locations.
  • the two ports perform "hop-port” sending with certain rules. .
  • the so-called "hop-port" transmission is to use the physical resources of one port, and select different ports for transmission in different time-frequency domain resource locations.
  • the DMRS port port 1,0 of the data channel is associated with port port 2,0 of the control channel
  • the DMRS port port 1,1 of the data channel is associated with the DMRS port port 2,1 of the control channel.
  • Information on whether there is configuration of sending two or more DMRS ports by using a payload of one DMRS port can be indicated by high-level signaling.
  • the code channel multiplexing between the DMRS ports of the data channel described above is an example. In the case of frequency division multiplexing, it can also be supported without affecting the configuration of the control channel DMRS port.
  • Embodiment 10 is a diagrammatic representation of Embodiment 10:
  • An embodiment of the present invention stands at a second communication device (receiving side), and correspondingly provides a demodulation reference signal processing method. Referring to FIG. 10, the method mainly includes the following steps.
  • the second communication device includes a user terminal, a vehicle-mounted terminal, a roadside device, and the like.
  • S10b Extract each first demodulation reference signal and each second demodulation reference signal in the configured physical resources, and an association relationship between the first demodulation reference signal and the second demodulation reference signal.
  • the association relationship includes, but is not limited to, a quasi-co-location, the same sequence, and the same precoding matrix.
  • S10c Demodulate the first type of channel resources according to each first demodulation reference signal, demodulate the second type of channel resources according to each second demodulation reference signal, and perform demodulation according to the first demodulation reference signal and the first demodulation reference signal. Association relationship of the second demodulation reference signal, and auxiliary demodulation of the first type of channel resource through the second demodulation reference signal.
  • Embodiment 11 is a diagrammatic representation of Embodiment 11:
  • the embodiment of the present invention stands on the system side (including the first communication device and the second communication device), and correspondingly provides a demodulation reference signal processing method.
  • the method mainly includes the following steps.
  • the first communication node acquires physical resources to be configured, and the physical resources to be configured include first-type channel resources and second-type channel resources; and configures M first demodulation reference signal ports for the first-type channel resources, and for the second type Channel resources are configured with N second demodulation reference signal ports.
  • the first demodulation reference signal is used for demodulation of the first type of channel resources
  • the second demodulation reference signal is used for demodulation of the second type of channel resources.
  • At least one of the first demodulation reference signal ports is associated with at least one of the N second demodulation reference signal ports, and M and N are positive integers.
  • the first communication node forms a configured physical resource and sends the configured physical resource to the second communication node.
  • the second communication device includes a user terminal, a vehicle-mounted terminal, a roadside device, and the like.
  • the second communication node receives the configured physical resources sent by the first communication node, and the second communication node extracts each first demodulation reference signal and each second demodulation reference signal in the configured physical resources, and the first solution. Correlation between the modulation reference signal and the second demodulation reference signal; the second communication node demodulates the first type of channel resources according to each first demodulation reference signal, and the second type according to each second demodulation reference signal Demodulate channel resources, and perform auxiliary demodulation on the first type of channel resources by using the second demodulation reference signal according to the correlation between the first demodulation reference signal and the second demodulation reference signal.
  • the association relationship includes, but is not limited to, a quasi-co-location, the same sequence, and the same precoding matrix.
  • Embodiment 12 is a diagrammatic representation of Embodiment 12
  • An embodiment of the present invention provides a demodulation reference signal processing device, which is used to implement the demodulation reference signal processing method described in any one of the first embodiment to the ninth embodiment.
  • the demodulation reference signal processing device 120 includes an acquisition module 121 and a configuration module 122.
  • the obtaining module 121 is configured to obtain physical resources to be configured, and the physical resources to be configured include channel resources of a first type and channel resources of a second type.
  • the configuration module 122 is configured to configure M first demodulation reference signal ports for the first type of channel resources, and configure N second demodulation reference signal ports for the second type of channel resources, and the first demodulation reference signal is used for the first Demodulation of channel-like resources, the second demodulation reference signal is used for demodulation of channel resources of the second type, and at least one of the M first demodulation reference signal ports and the N second demodulation reference signal ports At least one has an association relationship, and M and N are both positive integers.
  • the functions of the acquisition module 121 and the configuration module 122 may be implemented by a processor.
  • Embodiment 13 is a diagrammatic representation of Embodiment 13:
  • An embodiment of the present invention provides a demodulation reference signal processing device, which is configured to implement the demodulation reference signal processing method described in the tenth embodiment.
  • the demodulation reference signal processing apparatus 130 includes a receiving module 131, an extraction module 132, and a demodulation module 133.
  • the receiving module 131 is configured to receive a configured physical resource sent by a first communication node.
  • the extraction module 132 is configured to extract each first demodulation reference signal and each second demodulation reference signal in the configured physical resources, and an association relationship between the first demodulation reference signal and the second demodulation reference signal.
  • the demodulation module 133 is configured to demodulate the channel resources of the first type according to each first demodulation reference signal, demodulate the channel resources of the second type according to each second demodulation reference signal, and perform demodulation according to the first solution.
  • the correlation between the modulation reference signal and the second demodulation reference signal, and the auxiliary demodulation of the first type of channel resources is performed through the second demodulation reference signal.
  • the receiving module 131, the extracting module 132, and the demodulating module 133 may be implemented by a processor.
  • Embodiment 14 is a diagrammatic representation of Embodiment 14:
  • An embodiment of the present invention provides a demodulation reference signal processing system, which is used to implement the demodulation reference signal processing method described in any one of the first to ninth embodiments, and the demodulation reference signal processing described in the tenth embodiment. method.
  • the demodulation reference signal processing system 140 includes the demodulation reference signal processing device 120 according to the eleventh embodiment and the demodulation reference signal processing device 130 according to the twelfth embodiment.
  • An embodiment of the present invention provides a device.
  • the device includes a first processor 151, a first memory 152, and a first communication bus 153.
  • the first communication bus 153 is configured to implement connection and communication between the first processor 151 and the first memory 152.
  • the first processor 151 is configured to execute at least one computer program stored in the first memory 152 to implement the demodulation reference signal processing method according to any one of the first embodiment to the ninth embodiment.
  • An embodiment of the present invention provides a terminal.
  • the terminal includes a second processor 161, a second memory 162, and a second communication bus 163.
  • the second communication bus 163 is configured to implement connection and communication between the second processor 161 and the second memory 162.
  • the second processor 161 is configured to execute at least one computer program stored in the second memory 162 to implement the demodulation reference signal processing method as described in the tenth embodiment.
  • Embodiment 17 is a diagrammatic representation of Embodiment 17:
  • An embodiment of the present invention provides a storage medium including a volatile or non-volatile memory implemented in any method or technology for storing information such as computer-readable instructions, data structures, computer program modules, or other data. Volatile, removable or non-removable media.
  • Computer-readable storage media include, but are not limited to, Random Access Memory (RAM), Read-Only Memory (ROM), Electrically Erasable Programmable Readable Memory (EEPROM) ), Flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical disc storage, magnetic box, magnetic tape, disk storage or other A magnetic storage device, or any other medium that can be used to store desired information and can be accessed by a computer.
  • the computer-readable storage medium in the embodiment of the present invention may be used to store at least one computer program, and the stored at least one computer program may be executed by a processor to implement the demodulation reference signal processing method in the first embodiment to the ninth embodiment. At least one step, or at least one step of implementing the demodulation reference signal processing method in the tenth embodiment.
  • An embodiment of the present invention further provides a computer program (or computer software), which can be distributed on a computer-readable medium and executed by a computable device to implement the demodulation in the first to ninth embodiments.
  • a computer program or computer software
  • An embodiment of the present invention further provides a computer program product including a computer-readable device, where the computer-readable device stores the computer program as shown above.
  • the computer-readable device in this embodiment may include a storage medium as shown above.
  • a communication medium typically contains computer-readable instructions, data structures, computer program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. Therefore, the present disclosure is not limited to any particular combination of hardware and software.

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Abstract

La présente invention concerne un procédé de traitement de DMRS, un appareil, un système, un dispositif, un terminal et un support d'informations. Le procédé de traitement DMRS consiste : à acquérir des ressources physiques à configurer, les ressources physiques à configurer comprenant une première catégorie de ressources de canal et une seconde catégorie de ressources de canal ; à configurer M premiers ports de signal de référence de démodulation pour la première catégorie de ressources de canal et N seconds ports de signal de référence de démodulation pour la seconde catégorie de ressources de canal ; le premier signal de référence de démodulation est utilisé pour démoduler la première catégorie de ressources de canal, et le second signal de référence de démodulation est utilisé pour démoduler la seconde catégorie de ressources de canal ; une relation d'association existe entre au moins un élément parmi les M premiers ports de signal de référence de démodulation et au moins un élément parmi les N seconds ports de signal de référence de démodulation, et M et N étant des entiers positifs.
PCT/CN2019/106894 2018-09-29 2019-09-20 Procédé de traitement dmrs, appareil, système, dispositif, terminal et support d'informations WO2020063464A1 (fr)

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