WO2021088267A1 - Multi-transmission mechanism indication method and device - Google Patents

Abstract

The present application discloses a multi-transmission mechanism indication method and device. Said method comprises the following steps: high-layer signaling containing first indication information, the first indication information identifying a type of TDM transmission mechanism; the high-layer signaling containing second indication information, the second indication information identifying a type of FDM transmission mechanism; and downlink control signaling containing dynamic indication information, the dynamic indication information being used for distinguishing TDM, FDM, and SDM transmission mechanisms. The present application further comprises a terminal device, a network device, and a system using said method. The solution of the present application solves the problem of low efficiency during establishment of a transmission mechanism between a network device and a terminal device, satisfying the requirements of dynamically switching transmission mechanisms when a service changes, and reducing signaling overheads to the greatest extent.

Description

Indication method and equipment for multiple transmission mechanisms

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 201911087765.2, and the invention title is "a method and device for indicating multiple transmission mechanisms" on November 8, 2019. The entire content is incorporated into this application by reference.

Technical field

This application relates to the field of mobile communication technology, and in particular to a method for indicating multiple transmission mechanisms and a device using the same.

Background technique

With the introduction of large-scale antenna technology, multiple panels of a base station large-scale antenna can transmit at the same time, and multiple base stations can also transmit at the same time, which is called multi-TRP/multi-panel transmission technology. Using multiple TRP/multiple panels to send the same data using multiple beams can improve reliability and is used for scheduling low-latency and high-reliability services. Among them, the main feasible mechanisms for multi-panel, low-latency and high-reliability scheduling include space division multiplexing (SDM), frequency division multiplexing (FDM) and time division multiplexing (TDM) mechanisms. The space division multiplexing mechanism (SDM) method refers to the overlapping of time and frequency resources in a time slot. Each group of DM RS ports is associated with a beam of multiple panels, and different coded bits are mapped to different layers. . There are two mechanisms for frequency division multiplexing. One is that different coded bits of the same RV from multiple TRPs are mapped to different groups of RBs, similar to the frequency switching transmission diversity between multiple TRPs, but the diversity gain is limited. It is called FDMa; the second method is that different RVs from multiple TRPs are mapped to different groups of RBs and sent on different coded bits, called FDMb, to obtain higher reliability. Frequency multiplexing is compared with space division multiplexing. Because there is no interference between TRPs, there is better performance. The time division multiplexing mechanism includes two mechanisms: time division repetition (TDMa) in time slots and time division repetition between time slots (TDMb). Different coded bits of multiple TRPs correspond to different time resource allocations, and all transmission moments use a unified MCS , RV/TCI status is the same or different at the moment of sending. The time division multiplexing method is a combination of time domain and space domain repetition, which can be used in scenarios with higher reliability and resource utilization requirements.

When supporting the five transmission mechanisms of space division, frequency division and time division multiplexing, different transmission mechanisms must be configured according to different delay requirements, reliability requirements and channel conditions, and corresponding signaling needs to be designed. The signalling includes RRC layer signalling, MAC layer signal and physical layer control signalling, and the signalling overhead should be reduced as much as possible.

Summary of the invention

The embodiments of the present application provide a method and device for indicating multiple transmission mechanisms to solve the problem of low efficiency when establishing a transmission mechanism between a network device and a terminal device.

In the first aspect, an embodiment of the present application proposes a method for indicating multiple transmission mechanisms, which includes the following steps:

The high-layer signaling includes first indication information, and the first indication information identifies 1 TDM transmission mechanism;

The high-layer signaling includes second indication information, and the second indication information identifies 1 FDM transmission mechanism;

The downlink control signaling contains dynamic indication information, and the dynamic indication information is used to distinguish TDM, FDM, and SDM transmission mechanisms.

Preferably, the dynamic indication information includes third indication information, which is used to identify the SDM transmission mechanism.

Preferably, the dynamic indication information includes fourth indication information, which is used to distinguish TDM from FDM.

Preferably, the third indication information is the value of the number of DM RS CDM groups.

Preferably, the fourth indication information is a reserved word in any downlink control signaling. Alternatively, the fourth indication information is multiplexed with idle indication information in the downlink control signaling. Preferably, the idle indication information is one of the following indication information: modulation and coding scheme, new data indication, and redundancy version.

Preferably, the fourth indication information is 1 bit.

In the second aspect, an embodiment of the present application also proposes a terminal device, using the method of any one of the embodiments of the present application, and the terminal device is used to:

Receiving the high-level signaling, identifying the first indication information and the second indication information, and preliminarily determining 1 TDM transmission mechanism and 1 FDM transmission mechanism;

The downlink control signaling is received, the dynamic indication information is identified, and one transmission mechanism is selected among the SDM transmission mechanism, the 1 TDM transmission mechanism, and the 1 FDM transmission mechanism.

An embodiment of the present application also provides a terminal device, including: a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the computer program is executed by the processor. Apply for any step of the method described in the embodiment.

In the third aspect, the embodiments of the present application also propose a network device, using the method of any one of the embodiments of the present application, and the network device is used to:

Receiving the high-level signaling, identifying the first indication information and the second indication information, and preliminarily determining 1 TDM transmission mechanism and 1 FDM transmission mechanism;

Sending the downlink control signaling includes the dynamic indication information, and specifies one transmission mechanism among the SDM transmission mechanism, the one TDM transmission mechanism, and the one FDM transmission mechanism.

An embodiment of the present application also proposes a network device, including: a memory, a processor, and a computer program stored on the memory and capable of running on the processor. Apply for any step of the method described in the embodiment.

In a fourth aspect, this application proposes a mobile communication system, which is characterized in that it includes at least one terminal device as described in any of the embodiments of this application and at least one network device as described in any of the embodiments of this application. equipment.

In a fifth aspect, the present application also proposes a computer-readable medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the present application are implemented .

The foregoing at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

Taking into account the space division multiplexing, frequency division multiplexing and time division multiplexing methods, it is suitable for different low-latency and high-reliability services. In order to better adapt to service changes, the signaling indication method realizes each space division multiplexing Dynamic switching. The distinction between the two methods of frequency division multiplexing and the two methods of time division multiplexing can be distinguished by semi-static signaling. This signaling design method combines downlink control signaling and RRC signaling, which not only satisfies the need for dynamic switching of transmission mechanisms when services change, but also minimizes signaling overhead.

Description of the drawings

Figure 1 is a flowchart of an embodiment of the method of this application;

Figure 2 is a schematic diagram of an embodiment of a terminal device of this application;

Figure 3 is a schematic diagram of an embodiment of a network device of this application;

4 is a schematic structural diagram of a network device according to another embodiment of the present invention;

Fig. 5 is a block diagram of a terminal device according to another embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a flowchart of an embodiment of the method of this application.

The embodiment of the present application proposes a method for indicating multiple transmission mechanisms, which includes the following steps:

Step 101: Configure one TDM transmission mechanism and or one FDM transmission mechanism through high-level signaling.

The high-level signaling includes first indication information, and the first indication information identifies one type of TDM transmission mechanism; the high-level signaling includes second indication information, and the second indication information identifies one type of FDM transmission mechanism.

Taking into account the two mechanisms of time division multiplexing and the two mechanisms of frequency division multiplexing, different mechanisms do not need to be changed frequently, so RRC signaling is used to indicate the specific time division multiplexing mechanism and frequency division multiplexing mechanism. For example, RRC signaling is used to indicate the number of repetitions of URLLC transmission (i.e., the first indication information) to distinguish between time division multiplexing mechanism 1 and time division multiplexing mechanism 2, and the newly added RRC signaling (i.e., second indication information) is used to indicate frequency. Division multiplexing mechanism 1 and frequency division multiplexing mechanism 2.

For another example, when the URLLC transmission times (URLLCrepnumber) configured by RRC signaling is greater than 1, it indicates the TDM 2 mechanism; when the URLLC transmission times is less than 1, new RRC signaling is used to distinguish TDM1, FDM1, and FDM2.

Step 102: Determine one transmission mechanism among TDM, FDM and SDM mechanisms through the dynamic indication information in the downlink control signaling.

The downlink control signaling contains dynamic indication information, and the dynamic indication information is used to distinguish TDM, FDM, and SDM transmission mechanisms.

Preferably, the dynamic indication information includes third indication information, which is used to identify the SDM transmission mechanism. Further preferably, the third indication information is the number value of the DM RS CDM group.

For example, downlink control signaling DCI format 1_1 types of DM RS CDM groups indicate the number to distinguish SDM and FDM, because SDM is the entire resource, different layers use different TCI states, so the number of CDM groups is 2 to indicate that the transmission mechanism is SDM , And FDM/TDM uses different TCI states for different frequency resources and time resources, that is, the DM RSs of the first group of CDM groups use the first TCI state, and the DM RSs of the second group of CDM groups use the second TCI state. Since the coded bits of different layers of SDM are different, that is, the indicated beam directions are different, the DMRS port configuration in the downlink control signaling is different, so the physical layer control signaling can be used to distinguish SDM and FDM.

Table 1. Identify SDM by the number of DM RS CDM groups

(The data in the table is taken from 3GPP TS28.212 V15.5.0 Table 7.3.1.2.2-1)

Index value	DMRS CDM group quantity value	Number of DMRS ports
0	1	0

1	1	1
2	1	0,1
3	2	0
4	2	1
5	2	2
…	…	…
11	2	0,2
12-15	Keep	Keep

Preferably, the dynamic indication information includes fourth indication information, which is used to distinguish TDM from FDM. Preferably, the fourth indication information is a reserved word in any downlink control signaling. Alternatively, the fourth indication information is multiplexed with idle indication information in the downlink control signaling. Preferably, the idle indication information is one of the following indication information: modulation and coding scheme, new data indication, and redundancy version. Preferably, the fourth indication information is 1 bit.

For example, the DCI format 1_1 in the 3GPP TS 28.212 V15.5.0 version is used to schedule the PDSCH in one cell. For transport block 1, there are the following indication information: Modulation and coding scheme (Modulation and coding scheme), new data indication ( New data indicator) and redundancy version (Redundancy version), for transmission block 2 (existing only when maxNrofCodeWordsScheduledByDCI is equal to 2) also have these three indication information.

For example, the reserved bits or unused bits of the downlink control signaling DCI format 1_1 indicate TDM and FDM. For example, if there is an unenabled transport block, one bit indicating the new data indicator of the transport block is used to indicate TDM and FDM.

For another example, examples of dynamic indications of the three mechanisms are as follows:

When the number of TCI status indications is 1, it is a single TRP transmission.

When the number of TCI status indications is 2, and the number of DM RS CDMs indicated is 2, it is a multi-TRP space division multiplexing transmission mechanism.

When the number of TCI status indications is 2, the number of DM RS CDM indicated is 1, and the new data indication for the scheduled transmission block TB is 0, it is a multi-TRP time division multiplexing transmission mechanism.

Figure 2 is a schematic diagram of an embodiment of a terminal device of this application. Terminal equipment in this application refers to mobile terminal equipment.

The terminal device is configured to receive the high-level signaling, identify the first indication information and the second indication information, and preliminarily determine one TDM transmission mechanism and one FDM transmission mechanism.

The terminal equipment is also used for: receiving the downlink control signaling, identifying the dynamic indication information, and selecting one transmission among the SDM transmission mechanism, the 1 TDM transmission mechanism, and the 1 FDM transmission mechanism mechanism.

When the method embodiment of the present invention is applied to a terminal device, it works according to the following steps:

Step 301: The terminal device receives high-level signaling, recognizes the first indication information, and determines 1 TDM transmission mechanism; recognizes the second indication information, and determines 1 FDM transmission mechanism;

Step 302: The terminal device receives the downlink control signaling, and identifies dynamic indication information. The dynamic indication information is used to distinguish TDM, FDM, and SDM transmission mechanisms.

Preferably, the dynamic indication information includes third indication information, which is used to identify the SDM transmission mechanism; preferably, the third indication information is the number of DM RS CDM groups.

Preferably, the dynamic indication information includes fourth indication information, which is used to distinguish TDM from FDM. Preferably, the fourth indication information is a reserved word in any downlink control signaling, or the fourth indication information is multiplexed with idle indication information in the downlink control signaling. Preferably, the idle indication information is one of the following indication information: modulation and coding scheme, new data indication, and redundancy version.

To implement the above technical solution, a terminal device 500 proposed in this application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503. The terminal receiving module is configured to receive downlink data PDSCH, the higher layer signaling and or the downlink control signaling PDCCH, and identify the first indication information, the second indication information, the third indication information, and the fourth indication information. The terminal determining module is used to determine the 1 TDM transmission mechanism, 1 FDM transmission mechanism and or SDM transmission mechanism. The terminal sending module is used to send uplink control signaling PUCCH or uplink data PUSCH.

Fig. 3 is a schematic diagram of an embodiment of a network device of this application.

The embodiment of the application also proposes a network device, the network device is used to: receive the high-level signaling, identify the first indication information and the second indication information, and preliminarily determine 1 TDM transmission mechanism and 1 FDM transmission Mechanism; the network equipment is also used to: send the downlink control signaling, including the dynamic indication information, specify one of the SDM transmission mechanism, the 1 TDM transmission mechanism, and the 1 FDM transmission mechanism Transmission mechanism.

When the method embodiment of the present invention is applied to a network device, it works according to the following steps:

Step 301: The network device receives high-level signaling, recognizes the first indication information, and determines 1 TDM transmission mechanism; recognizes the second indication information, and determines 1 FDM transmission mechanism;

Step 302: The network device sends downlink control signaling, and the downlink control signaling includes dynamic indication information, and the dynamic indication information is used to distinguish TDM, FDM, and SDM transmission mechanisms.

Preferably, the dynamic indication information includes third indication information, which is used to identify the SDM transmission mechanism. Preferably, the third indication information is the number value of the DM RS CDM group.

Preferably, the dynamic indication information includes fourth indication information, which is used to distinguish TDM from FDM. Preferably, the fourth indication information is a reserved word in any downlink control signaling. Alternatively, the fourth indication information is multiplexed with idle indication information in the downlink control signaling. Preferably, the idle indication information is one of the following indication information: modulation and coding scheme, new data indication, and redundancy version.

In order to implement the above technical solution, a network device 400 proposed in this application includes a network sending module 401, a network determining module 402, and a network receiving module 403. The network receiving module is configured to receive uplink data PUSCH, the high-level signaling and or uplink control signaling, and identify the first indication information and the second indication information. The terminal determining module is used to determine the 1 TDM transmission mechanism, 1 FDM transmission mechanism and or SDM transmission mechanism. The terminal sending module is configured to generate dynamic indication information, including third indication information and or fourth indication information, and send downlink control signaling. The terminal invention module is also used to send downlink data PDSCH.

Fig. 4 shows a schematic structural diagram of a network device according to another embodiment of the present invention. As shown in FIG. 4, the network device 600 includes a processor 601, a wireless interface 602, and a memory 603. Wherein, the wireless interface may be multiple components, including a transmitter and a receiver, and provide a unit for communicating with various other devices on a transmission medium. The wireless interface realizes the communication function with the terminal device, and processes the wireless signal through the receiving and transmitting device, and the data carried by the signal communicates with the memory or the processor via an internal bus structure. The memory 603 contains a computer program for executing any one of the embodiments of the present application, and the computer program runs or changes on the processor 601. When the memory, processor, and wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which will not be repeated here.

Fig. 5 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 700 shown in FIG. 5 includes at least one processor 701, a memory 702, a user interface 703, and at least one network interface 704. The various components in the terminal device 700 are coupled together through a bus system. The bus system is used to realize the connection and communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.

The user interface 703 may include a display, a keyboard, or a pointing device, for example, a mouse, a trackball, a touch panel, or a touch screen.

The memory 702 stores executable modules or data structures. The operating system and application programs can be stored in the memory. Among them, the operating system contains various system programs, such as a framework layer, a core library layer, and a driver layer, which are used to implement various basic services and process hardware-based tasks. Application programs include various application programs, such as media players, browsers, etc., for implementing various application services.

In the embodiment of the present invention, the memory 702 contains a computer program for executing any one of the embodiments of the present application, and the computer program runs or changes on the processor 701.

The memory 702 contains a computer-readable storage medium, and the processor 701 reads information in the memory 702, and completes the steps of the foregoing method in combination with its hardware. Specifically, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 701, each step of the method embodiment described in any one of the embodiments of FIGS. 1 to 3 is implemented.

The processor 701 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the method of the present application can be completed by an integrated logic circuit of hardware in the processor 701 or instructions in the form of software. The processor 701 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present invention may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.

Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. In a typical configuration, the device of the present application includes one or more processors (CPU), input/output user interface, network interface, and memory.

In addition, the present invention may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

Therefore, the present application also proposes a computer-readable medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the present application are implemented. For example, the memory 603, 702 of the present invention may include non-permanent memory, random access memory (RAM) and/or non-volatile memory in a computer-readable medium, such as read-only memory (ROM) or flash memory ( flash RAM).

Computer-readable media include permanent and non-permanent, removable and non-removable media, and information storage can be realized by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical storage, Magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media can be used to store information that can be accessed by computing devices. According to the definition in this article, computer-readable media does not include transitory media, such as modulated data signals and carrier waves.

This application also proposes a mobile communication system, including at least one terminal device as described in any embodiment of this application and at least one network device as described in any embodiment of this application.

It should be noted that the ordinal numbers such as "first", "second", and "third" in this application document are used to distinguish the nouns they modify, and are not used as the meaning of comparing the magnitude and height of values understanding. For example, the first aspect, the first indication information, and the second indication information.

It should also be noted that the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or equipment including a series of elements not only includes those elements, but also includes Other elements that are not explicitly listed, or they also include elements inherent to such processes, methods, commodities, or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, commodity, or equipment that includes the element.

The foregoing descriptions are only examples of the present application, and are not used to limit the present application. For those skilled in the art, this application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the scope of the claims of this application.

Claims (18)

1. A method for indicating multiple transmission mechanisms is characterized in that it comprises the following steps:

   The high-layer signaling includes first indication information, and the first indication information identifies 1 TDM transmission mechanism;

   The high-layer signaling includes second indication information, and the second indication information identifies 1 FDM transmission mechanism;
2. The method of claim 1, wherein:

   The downlink control signaling contains dynamic indication information, and the dynamic indication information is used to distinguish TDM, FDM, and SDM transmission mechanisms.
3. The method of claim 1, wherein:

   The signaling that uses RRC signaling to indicate the number of repetitions of URLLC transmission is distinguished between TDM1 and TDM2.
4. The method according to any one of claims 1 to 3, wherein:

   Use new RRC signaling to indicate FDM1 and FDM2.
5. The method of claim 4, wherein:

   The new RRC signaling is used to distinguish TDM1, FDM1 and FDM2.
6. The method according to any one of claims 1 to 3, wherein:

   The dynamic indication information includes third indication information, which is used to identify the SDM transmission mechanism.
7. The method according to any one of claims 1 to 3, wherein:

   The dynamic indication information includes fourth indication information, which is used to distinguish TDM from FDM.
8. The method of claim 6, wherein:

   The third indication information is the number of DM RS CDM groups.
9. The method of claim 7, wherein:

   The fourth indication information is a reserved word in any downlink control signaling.
10. The method of claim 7, wherein:

    The fourth indication information is multiplexed with idle indication information in the downlink control signaling.
11. The method of claim 7, wherein:

    The fourth indication information is 1 bit.
12. The method of claim 10, wherein:

    The idle indication information is one of the following indication information:

    Modulation and coding scheme;

    New data indication;

    Redundant version.
13. A terminal device using the method of any one of claims 1-12, characterized in that the terminal device is used for:

    Receiving the high-level signaling, identifying the first indication information and the second indication information, and preliminarily determining 1 TDM transmission mechanism and 1 FDM transmission mechanism;

    The downlink control signaling is received, the dynamic indication information is identified, and one transmission mechanism is selected among the SDM transmission mechanism, the 1 TDM transmission mechanism, and the 1 FDM transmission mechanism.
14. A terminal device, which is characterized by comprising: a memory, a processor, and a computer program stored on the memory and capable of running on the processor, and the computer program is executed by the processor as claimed Step of the method described in any one of 1-12.
15. A network device using the method of any one of claims 1-12, characterized in that:

    The network device is configured to: receive the high-level signaling, identify the first indication information and the second indication information, and preliminarily determine 1 TDM transmission mechanism and 1 FDM transmission mechanism;

    Sending the downlink control signaling includes the dynamic indication information, and specifies one transmission mechanism among the SDM transmission mechanism, the one TDM transmission mechanism, and the one FDM transmission mechanism.
16. A network device, characterized by comprising: a memory, a processor, and a computer program stored on the memory and capable of running on the processor, and when the computer program is executed by the processor, the implementation is as claimed in the claims Steps of the method described in any one of 1-12.
17. A mobile communication system, characterized by comprising at least one terminal device according to any one of claims 13-14 and at least one network device according to any one of claims 15-16.
18. A computer-readable medium storing a computer program on the computer-readable medium, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 12 are realized.

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