CN112929126A - Network device, user terminal, communication method and communication system - Google Patents
Network device, user terminal, communication method and communication system Download PDFInfo
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- CN112929126A CN112929126A CN201911237738.9A CN201911237738A CN112929126A CN 112929126 A CN112929126 A CN 112929126A CN 201911237738 A CN201911237738 A CN 201911237738A CN 112929126 A CN112929126 A CN 112929126A
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- 238000004891 communication Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
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- 238000004590 computer program Methods 0.000 claims description 9
- 235000019527 sweetened beverage Nutrition 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 16
- 238000012545 processing Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
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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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
Abstract
The disclosure provides a network device, a user terminal, a communication method and a communication system, and relates to the field of wireless communication. The utility model discloses a TDD frame structure with shorter time domain period, the time interval between the uplink and downlink transmission resources is short, the communication between the network device and the user terminal is carried out according to the TDD frame structure, and the service time delay brought can be obviously reduced. In addition, according to the heavy degree of the uplink and downlink services, a TDD frame structure with more downlink or uplink transmission resources can be adaptively selected for communication, so that different service requirements are met.
Description
Technical Field
The present disclosure relates to the field of wireless communications, and in particular, to a network device, a user terminal, a communication method, and a communication system.
Background
In the NR (New Radio, New air interface) initial-stage eMBB (Enhanced Mobile Broadband) service, a TDD (Time Division duplex) frame structure period is 2ms, 2.5ms, or 5ms, and a data channel is mainly slot-based (slot-based) transmission.
URLLC (Ultra Reliable Low Latency Communications) service is sensitive to delay, requiring 1 ms. The current eMBB frame structure design is difficult to meet the time delay requirement of URLLC service.
Disclosure of Invention
The utility model discloses a TDD frame structure with shorter time domain period, the time interval between the uplink and downlink transmission resources is short, the communication between the network device and the user terminal is carried out according to the TDD frame structure, and the service time delay brought can be obviously reduced. In addition, according to the heavy degree of the uplink and downlink services, a TDD frame structure with more downlink or uplink transmission resources can be adaptively selected for communication, so that different service requirements are met.
Some embodiments of the present disclosure propose a communication method, comprising:
the network equipment and the user terminal communicate according to a Time Division Duplex (TDD) frame structure;
the TDD frame structure takes 1 time slot or 2 time slots as a period, and 1 time slot of the TDD frame structure comprises a downlink information part, a gap part and an uplink information part.
In some embodiments, the downlink information portion is configured to transmit downlink SSBs, PDCCHs, PDSCHs; the uplink information part is configured to transmit uplink SRS, PUCCH, PUSCH.
In some embodiments, in 1 timeslot, the first communication and/or the second communication is completed between the network device and the user terminal according to a TDD frame structure;
the first communication includes: the network equipment performs downlink scheduling based on the PDCCH and performs downlink transmission based on the PDSCH, and the user equipment performs uplink feedback based on the PUCCH;
the second communication includes: the network equipment performs uplink scheduling based on the PDCCH, and the user equipment performs uplink transmission based on the PUSCH.
In some embodiments, in a TDD frame structure with 1 timeslot as a period, a ratio of resources occupied by a downlink information portion, a gap portion, and an uplink information portion includes 10: 2: 2,8: 2: 4,6: 2: 6.
in some embodiments, in a TDD frame structure with a period of 2 slots:
if one of the time slots is a downlink time slot, the proportion of the resources occupied by the downlink information part, the gap part and the uplink information part in the other time slot comprises 6: 2: 6,4: 2: 8,2: 2: 10,0: 2: 12;
if one of the time slots is an uplink time slot, the proportion of the resources occupied by the downlink information part, the gap part and the uplink information part in the other time slot comprises 6: 2: 6,8: 2: 4,10: 2: 2,12: 2: 0.
in some embodiments, the downlink information portion and the uplink information portion have different resource proportions throughout the TDD frame structure;
under the condition that the downlink information is more than the uplink information, the network equipment and the user terminal communicate according to a TDD frame structure in which the proportion of partial resources of the downlink information is more than that of partial resources of the uplink information;
under the condition of the service that the downlink information is less than the uplink information, the network equipment and the user terminal communicate according to a TDD frame structure that the resource proportion of the downlink information part is less than that of the uplink information part.
Some embodiments of the present disclosure provide a network device, comprising: a memory; and a processor coupled to the memory, the processor configured to perform the communication method of any of the embodiments based on instructions stored in the memory.
Some embodiments of the present disclosure provide a user terminal, including: a memory; and a processor coupled to the memory, the processor configured to perform the communication method of any of the embodiments based on instructions stored in the memory.
Some embodiments of the present disclosure propose a communication system, including: a network device, and a user terminal.
Some embodiments of the disclosure propose a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the communication method of any of the embodiments.
Drawings
The drawings that will be used in the description of the embodiments or the related art will be briefly described below. The present disclosure will be more clearly understood from the following detailed description, which proceeds with reference to the accompanying drawings,
it is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without undue inventive faculty.
Fig. 1A, 1B, and 1C show some TDD frame structures with a period of 1 timeslot.
Fig. 2A, 2B, 2C, and 2D are schematic diagrams illustrating TDD frame structures with a period of 2 slots.
Fig. 3A, 3B, 3C, and 3D are schematic diagrams illustrating alternative TDD frame structures with a period of 2 slots.
Fig. 4 is a schematic diagram of some embodiments of the disclosed communication system.
Fig. 5 is a schematic diagram of some embodiments of a network device of the present disclosure.
Fig. 6 is a schematic diagram of some embodiments of a user terminal of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure.
As described above, the present disclosure designs a TDD frame structure with a shorter time domain period, the time interval between uplink and downlink transmission resources is short, and communication between a network device and a user terminal according to the TDD frame structure can significantly reduce the service delay caused by the communication, and can be applied to services with higher delay requirements such as URLLC.
In order to avoid TDD uplink and downlink interference, the URLLC service and the eMBB service may be deployed at different frequency points, or multiplexed in the same frequency point in an FDM (frequency division multiplexing) manner.
Transmission resources, resources for short, such as OFDM (Orthogonal Frequency Division Multiplexing) symbol resources.
The TDD frame structure with a shorter time domain period is described first.
The TDD frame structure has a period of 1 slot or 2 slots. The period is 1 time slot, i.e. the time domain period of the TDD frame structure is 0.5 ms. The period is 2 time slots, i.e. the time domain period of the TDD frame structure is 1 ms. Under the two cycle types, 1 time slot of the TDD frame structure includes a downlink information portion, a gap portion, and an uplink information portion. If the period is 2 time slots, 1 time slot includes downlink information part, gap part and uplink information part.
The Downlink information section is configured to transmit Downlink information such as a Downlink SSB (Synchronization Signal Block), a PDCCH (Physical Downlink Control Channel), and a PDSCH (Physical Downlink Shared Channel).
The Uplink information portion is configured to transmit Uplink information such as an Uplink SRS (Sounding Reference Signal), a Physical Uplink Control Channel (PUCCH), and a Physical Uplink Shared Channel (PUSCH).
For convenience of illustration, in the drawing, a downlink information portion is denoted by D, a gap portion is denoted by G, and an uplink information portion is denoted by U.
In a TDD frame structure with 1 timeslot as a cycle, the ratio of resources (i.e., transmission resources) occupied by a downlink information portion, a gap portion, and an uplink information portion includes 10: 2: 2,8: 2: 4,6: 2: FIG. 1A, FIG. 1B, and FIG. 1C show examples of the above-mentioned materials. The frame structure shown in FIG. 1A \1B \1C can transmit 1 SSB wide beam.
In the TDD frame structure with 2 time slots as a cycle, if one of the time slots is a downlink time slot (DS), the proportion of the resources occupied by the downlink information portion, the gap portion, and the uplink information portion in the other time slot includes 6: 2: 6,4: 2: 8,2: 2: 10,0: 2: 12, as shown in fig. 2A (which may include 3 SSBs), 2B (which may include 2 SSBs), 2C (which may include 2 SSBs), and 2D (which may include 2 SSBs), respectively.
In the TDD frame structure with 2 time slots as a cycle, if one of the time slots is an uplink time slot (US), the proportion of the resources occupied by the downlink information part, the gap part and the uplink information part in the other time slot includes 6: 2: 6,8: 2: 4,10: 2: 2,12: 2: 0, as shown in FIG. 3A (which may include 1 SSB), 3B (which may include 1 SSB), 3C (which may include 1 SSB), and 3D (which may include 2 SSBs), respectively.
It can be seen that the resource proportion of the downlink information part and the uplink information part in the whole TDD frame structure is different. In fig. 1A-1B and fig. 2A-2D, the resource occupation ratio of the downlink information part is greater than that of the uplink information part; in fig. 3A-3D, the resource occupation ratio of the downlink information part is less than that of the uplink information part.
In both cases of taking 1 timeslot or 2 timeslots as a periodic TDD frame structure, in 1 timeslot, the first communication and/or the second communication between the network device and the user terminal is completed according to the TDD frame structure.
The first communication includes: the network equipment performs downlink scheduling based on the PDCCH, performs downlink transmission based on the PDSCH, and the user equipment performs uplink feedback based on the PUCCH.
The second communication includes: the network equipment performs uplink scheduling based on the PDCCH, and the user equipment performs uplink transmission based on the PUSCH.
Therefore, the method and the device can complete downlink scheduling + downlink transmission + uplink feedback and/or uplink scheduling + uplink transmission in one slot (slot).
The TDD frame structure with 1 time slot as the period can achieve lower time delay.
The TDD frame structure takes 2 time slots as a period, the overhead of a Gap Part (GP) is lower, and the requirement on the processing time delay of a terminal is lower.
Based on the TDD frame structure, the present disclosure provides a communication method, including: and the network equipment and the user terminal communicate according to the TDD frame structure. The communication here includes the aforementioned first communication and/or second communication, and specific reference is made to the foregoing, and details are not described here.
In the case of services with more downlink information than uplink information, the network device and the ue communicate according to a TDD frame structure with a resource ratio of a downlink information part being greater than that of an uplink information part, such as the frame structures shown in fig. 1A-1B and fig. 2A-2D.
Under the condition of a service with less downlink information than uplink information, the network device and the user terminal communicate according to a TDD frame structure with a resource proportion of a downlink information part less than that of an uplink information part, as shown in fig. 3A-3D.
Fig. 4 is a schematic diagram of some embodiments of the disclosed communication system.
As shown in fig. 4, the system of this embodiment includes: a network device 41 and a user terminal 42. The network device 41 and the user terminal 42 communicate with each other in the TDD frame structure. Specific communication methods refer to the foregoing.
Fig. 5 is a schematic diagram of some embodiments of a network device of the present disclosure.
As shown in fig. 5, the network device 41 of this embodiment includes:
a memory 510; and
a processor 520 coupled to the memory, the processor configured to execute the communication method of any of the embodiments based on instructions stored in the memory, i.e., the network device and the user terminal communicate in the TDD frame structure described above.
Fig. 6 is a schematic diagram of some embodiments of a user terminal of the present disclosure.
As shown in fig. 6, the user terminal 42 of this embodiment includes:
a memory 610; and
a processor 620 coupled to the memory, the processor configured to execute the communication method of any of the embodiments based on instructions stored in the memory, i.e., the user terminal and the network device communicate in the TDD frame structure described above.
The memories 510,610 may include, for example, system memory, fixed non-volatile storage media, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), and other programs.
In addition, the devices 41 and 42 may further include input/ output interfaces 530 and 630, network interfaces 540 and 640, storage interfaces 550 and 650, and the like. These interfaces 530/630, 540/640, 550/650, as well as memory 510/610 and processor 520/620 may be connected via a bus 560/660, for example. The input/output interface 530/630 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 540/640 provides a connection interface for a variety of networking devices. The storage interface 550/650 provides a connection interface for external storage devices such as an SD card and a usb disk.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (10)
1. A method of communication, comprising:
the network equipment and the user terminal communicate according to a Time Division Duplex (TDD) frame structure;
the TDD frame structure takes 1 time slot or 2 time slots as a period, and 1 time slot of the TDD frame structure comprises a downlink information part, a gap part and an uplink information part.
2. The method of claim 1,
the downlink information part is configured to transmit downlink SSBs, PDCCHs and PDSCHs;
the uplink information part is configured to transmit uplink SRS, PUCCH, PUSCH.
3. The method of claim 2,
in 1 time slot, the network equipment and the user terminal complete the first communication and/or the second communication according to the TDD frame structure;
the first communication includes: the network equipment performs downlink scheduling based on the PDCCH and performs downlink transmission based on the PDSCH, and the user equipment performs uplink feedback based on the PUCCH;
the second communication includes: the network equipment performs uplink scheduling based on the PDCCH, and the user equipment performs uplink transmission based on the PUSCH.
4. The method of claim 1,
in a TDD frame structure with 1 timeslot as a cycle, the proportion of resources occupied by a downlink information portion, a gap portion, and an uplink information portion includes 10: 2: 2,8: 2: 4,6: 2: 6.
5. the method of claim 1,
in a TDD frame structure with a period of 2 slots:
if one of the time slots is a downlink time slot, the proportion of the resources occupied by the downlink information part, the gap part and the uplink information part in the other time slot comprises 6: 2: 6,4: 2: 8,2: 2: 10,0: 2: 12;
if one of the time slots is an uplink time slot, the proportion of the resources occupied by the downlink information part, the gap part and the uplink information part in the other time slot comprises 6: 2: 6,8: 2: 4,10: 2: 2,12: 2: 0.
6. the method of claim 1, wherein the downlink information portion and the uplink information portion have different resource ratios in the whole TDD frame structure;
under the condition that the downlink information is more than the uplink information, the network equipment and the user terminal communicate according to a TDD frame structure in which the proportion of partial resources of the downlink information is more than that of partial resources of the uplink information;
under the condition of the service that the downlink information is less than the uplink information, the network equipment and the user terminal communicate according to a TDD frame structure that the resource proportion of the downlink information part is less than that of the uplink information part.
7. A network device, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the communication method of any of claims 1-6 based on instructions stored in the memory.
8. A user terminal, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the communication method of any of claims 1-6 based on instructions stored in the memory.
9. A communication system, comprising:
the network device of claim 7, and the user terminal of claim 8.
10. A non-transitory computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the communication method according to any one of claims 1 to 6.
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| CN201911237738.9A CN112929126A (en) | 2019-12-06 | 2019-12-06 | Network device, user terminal, communication method and communication system |
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| CN201911237738.9A CN112929126A (en) | 2019-12-06 | 2019-12-06 | Network device, user terminal, communication method and communication system |
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2019
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Application publication date: 20210608 |