KR102588451B1 - Communication method and device based on frame structure - Google Patents

Abstract

The present disclosure relates to 5G ( ^5th generation) or pre-5G communication systems to support higher data rates after 4G ( ^4th generation) communication systems such as LTE (Long Term Evolution). A method for operating user equipment (UE) in a wireless communication system is provided. The method detects a synchronization signal block, performs a downlink synchronization process according to the detected synchronization signal block, and determines time-frequency resources of an anchor subband, the time-frequency resources of the anchor subband. Obtaining random access configuration information according to frequency resources, performing a random access process according to the random access configuration information, completing uplink synchronization, and obtaining control information in a control channel band, and Accordingly, it includes the process of performing data communication with the base station in the data transmission band.

Description

Communication method and device based on frame structure

This disclosure relates generally to wireless communication systems, and more specifically to communication methods and devices based on frame structures, methods and devices for determining random access preamble transmission power, user equipment (UE), base stations, and computer readouts associated therewith. It's about enabling media.

In order to meet the increasing demand for wireless data traffic following the commercialization of the 4G ( ^4th generation) communication system, efforts are being made to develop an improved 5G ( ^5th generation) communication system or a pre-5G communication system. For this reason, the 5G communication system or pre-5G communication system is called a Beyond 4G Network communication system or a Post LTE (Long Term Evolution) system.

To achieve high data rates, 5G communication systems are being considered for implementation in ultra-high frequency (mmWave) bands (such as the 60 GHz band). In order to alleviate the path loss of radio waves in the ultra-high frequency band and increase the transmission distance of radio waves, the 5G communication system uses beamforming, massive array multiple input/output (massive MIMO), and full dimension multiple input/output (FD-MIMO). ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed.

In addition, to improve the network of the system, the 5G communication system uses evolved small cells, advanced small cells, cloud radio access networks (cloud RAN), and ultra-dense networks. , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation. Technology development is underway. In addition, the 5G system uses FQAM (Hybrid Frequency Shift Keying and Quadrature Amplitude Modulation) and SWSC (Sliding Window Superposition Coding), which are advanced coding modulation (ACM) methods, and FBMC (Filter Bank Multi Carrier), which is an advanced access technology. ), NOMA (Non Orthogonal Multiple Access), and SCMA (Sparse Code Multiple Access) are being developed.

Embodiments of the present disclosure provide a communication method and device based on a frame structure.

Embodiments of the present disclosure provide a communication method and device based on a frame structure that can significantly increase scheduling flexibility and improve spectrum utilization while securing the advantages of existing time division duplex and frequency division duplex.

Embodiments of the present disclosure provide a method for determining random access preamble transmission power.

According to various embodiments of the present disclosure, a method of operating user equipment (UE) in a wireless communication system is provided. The method includes detecting a synchronization signal block, performing a downlink synchronization process according to the detected synchronization signal block, determining time-frequency resources of an anchor subband, and time of the anchor subband. - Obtaining random access configuration information according to frequency resources, performing a random access process according to the random access configuration information, completing uplink synchronization, and obtaining control information in a control channel band, and obtaining the control information It includes the process of performing data communication with the base station in the data transmission band.

According to various embodiments of the present disclosure, a method of operating a base station (BS) in a wireless communication system is provided. The method includes performing a random access process with the terminal according to random access configuration information transmitted by the terminal through an anchor subband, and performing data communication with the terminal in a data transmission band.

According to various embodiments of the present disclosure, a method of operating user equipment (UE) in a wireless communication system is provided. The method includes obtaining random access configuration information from a base station, wherein the random access configuration information includes a random access configuration index and random access preamble subcarrier interval indication information, Obtaining a random access preamble format based on the random access configuration index and the random access preamble subcarrier interval indication information, and determining a random access preamble transmission power offset corresponding to the obtained random access preamble format. do.

According to various embodiments of the present disclosure, a method of operating a base station (BS) in a wireless communication system is provided. The method includes generating random access configuration information, wherein the random access configuration information includes a random access configuration index and random access preamble subcarrier interval indication information, and the random access configuration information includes a random access configuration index and random access preamble subcarrier interval indication information. It includes the process of transmitting access configuration information to user equipment (UE).

According to various embodiments of the present disclosure, user equipment (UE) is provided, configured to implement a method of operating the user equipment (UE) in a wireless communication system.

According to various embodiments of the present disclosure, a base station (BS) is provided, configured to implement a method of operating a user equipment (base station, BS) in a wireless communication system.

Methods and devices according to various embodiments of the present disclosure can greatly increase scheduling flexibility and improve spectrum utilization while obtaining the advantages of existing time division duplex and frequency division duplex.

The method and device according to various embodiments of the present disclosure can be applied to all preamble formats in a future wireless communication system by determining the random access preamble transmission power proposed in the present disclosure, and can efficiently use the preamble transmission power in the random access process. When controlling interference, the success probability of random access of the UE can be improved, and the performance of future wireless communication systems can be significantly improved, resulting in lower access delay and better access experience for the UE. can be provided.

For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings.
1 illustrates a wireless communication system according to various embodiments of the present disclosure.
Figure 2 illustrates a BS in a wireless communication system according to various embodiments of the present disclosure.
Figure 3 illustrates a terminal in a wireless communication system according to various embodiments of the present disclosure.
FIG. 4 illustrates a communication interface in a wireless communication system according to various embodiments of the present disclosure.
Figure 5 shows a schematic diagram of the FDD frame structure in the prior art.
Figure 6 shows a schematic diagram of the TDD frame structure in the prior art.
Figure 7 illustrates a frame structure according to various embodiments of the present disclosure.
FIG. 8 is a flowchart of a communication method based on a frame structure on the terminal side according to various embodiments of the present disclosure.
Figure 9 is a flowchart of a communication method based on a frame structure on the base station side according to various embodiments.
Figure 10 shows a schematic diagram of the channel structure adopted in the first embodiment of the present disclosure.
FIG. 11A shows a schematic diagram of a transmission mode of a system information block according to various embodiments of the present disclosure.
FIG. 11B shows a schematic diagram of another transmission mode of a system information block according to various embodiments of the present disclosure.
Figure 12 shows a schematic diagram of a control channel according to various embodiments of the present disclosure.
Figure 13 shows a schematic diagram of an anchor subband structure according to various embodiments of the present disclosure.
Figure 14 shows a schematic flowchart of uplink data communication according to various embodiments of the present disclosure.
Figure 15 shows a schematic diagram of timing division in uplink and downlink data transmission according to various embodiments of the present disclosure.
Figure 16 shows a schematic diagram of a channel structure according to Embodiment 3 of the present disclosure.
Figure 17 shows a schematic diagram of another channel structure according to Embodiment 3 of the present disclosure.
Figure 18 shows a schematic diagram of the structure of a communication device based on a frame structure on the terminal side according to various embodiments of the present disclosure.
Figure 19 shows a schematic diagram of the structure of a communication device based on a frame structure on the base station side according to various embodiments of the present disclosure.
Figure 20 schematically depicts an example wireless communication system according to various embodiments of the present disclosure.
FIG. 21 is a schematic flowchart of a method for determining random access preamble transmission power performed at a base station according to various embodiments of the present disclosure.
Figure 22 schematically shows a structural schematic diagram of a base station according to various embodiments of the present disclosure.
FIG. 23 schematically illustrates a flowchart of a method for determining random access preamble transmission power performed in a UE according to various embodiments of the present disclosure.
Figure 24 schematically shows a structural schematic diagram of a UE according to various embodiments of the present disclosure.

The present disclosure provides a communication method and communication device based on a frame structure, and a frame structure. Hereinafter, specific embodiments of the present disclosure will be described in detail with reference to the attached drawings.

Hereinafter, embodiments of the present disclosure will be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein identical or similar reference numerals throughout the drawings refer to identical or similar elements or elements having identical or similar functions. The embodiments described with reference to the attached drawings are illustrative and are used only to explain the present disclosure, and the present disclosure should not be considered limited thereto.

Those skilled in the art will understand that singular forms may also include plural forms, unless explicitly stated otherwise. As used in this description, the term "comprising" refers to the presence of a feature, integer, step, operation, element, and/or component, but also refers to the presence of one or more other features, integers, steps, operations, elements, components, and/or thereof. It will also be understood that this does not exclude the presence or addition of combinations. It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it may be directly connected or coupled to the other element or there may be intervening elements. Additionally, “connection” or “coupling” as used herein may include being connected or coupled wirelessly. As used herein, the term “and/or” includes any and all combinations of one or more related listed items.

Unless otherwise defined, those skilled in the art should understand that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. . Additionally, terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless clearly defined herein. You must understand.

As used herein, “terminal” and “terminal device” refer to a wireless signal receiver device, which is a device having only a wireless signal receiver without transmission capabilities, as well as a device having receiving and transmitting hardware capable of performing two-way communication through a two-way communication link. A person skilled in the art will understand that the present invention includes a device with receiving and transmitting hardware. These devices may include cellular or other communication devices with a single line display, a multi-line display, or a cellular or other communication device without a multi-line display; Personal Communications Service (PCS), which may combine voice, data processing, fax and/or data communications functions; Personal Digital Assistants (PDAs), which may include radio frequency (RF) receivers, pagers, Internet/intranet access, web browsers, nodepads, calendars, and/or Global Positioning System (GPS) receivers; It may include a conventional laptop and/or palmtop computer or other device, which may be a conventional laptop and/or palmtop computer or other device having and/or including an RF receiver. As used herein, “terminal”, “terminal device” may be portable, transportable, vehicle (air, marine and/or land) mounted, or may be adapted and/or configured to operate locally and/or It may operate in a distributed form on Earth and/or elsewhere in space. As used herein, “terminal” and “terminal device” also include a communication terminal, an Internet terminal, a music/video playback terminal, such as a PDA, a mobile Internet device (MID), and/or a mobile phone with a music/video playback function, or This can include smart TVs, set-top boxes, and other devices. Additionally, “terminal” and “terminal device” may be replaced with “user” and “UE”.

Hereinafter, in various embodiments of the present disclosure, a hardware approach will be described as an example. However, various embodiments of the present disclosure include technologies using both hardware and software, and therefore, the various embodiments of the present disclosure may not exclude the software aspect.

Hereinafter, the present disclosure describes a technique for communicating based on a frame structure in a wireless communication system and a technique for determining random access preamble transmission power, user equipment (UE), a base station, and computer-readable media related thereto.

Terms referring to a synchronization signal block, terms referring to random access configuration information, terms referring to a random access process, terms referring to control information, terms referring to a signal, terms referring to a channel, terms referring to control information. , terms referring to network entities, and terms referring to elements of devices used in the following description are used only for convenience of description. Accordingly, the present disclosure is not limited to the following terms, and other terms having the same technical meaning may be used.

Additionally, although this disclosure will describe various embodiments based on terminology used in some communication standards (eg, 3rd Generation Partnership Project (3GPP)), these are merely examples for explanation. Various embodiments of the present disclosure may be easily modified and applied to other communication systems.

1 illustrates a wireless communication system according to various embodiments of the present disclosure. In Figure 1, a base station (BS) 110, a terminal 120, and a terminal 130 are shown as some of the nodes that use a wireless channel in a wireless communication system. Although FIG. 1 shows only one BS, other BSs identical or similar to the BS 110 may be further included.

BS 110 is a network infrastructure that provides wireless access to terminals 120 and 130. BS 110 has coverage defined as a certain geographic area based on the distance over which signals can be transmitted. BS 110 may be referred to as an “access point (AP)”, “eNodeB (eNB)”, “5th generation (5G) node”, “wireless point”, “transmit/receive point (TRP)”, and “base station”. It may be possible.

Each of the terminals 120 and 130 is a device used by a user and communicates with the BS 110 through a wireless channel. In some cases, at least one of the terminals 120 and 130 may operate without user intervention. That is, at least one of the terminals 120 and 130 is a device that performs MTC (Machine Type Communication) and may not be carried by the user. Terminals 120 and 130 may each be referred to as a “user equipment (UE),” “mobile station,” “subscriber station,” “remote terminal,” “wireless terminal,” or “user equipment” and “terminal.”

The BS 110, terminal 120, and terminal 130 may transmit and receive wireless signals in the millimeter wave (mmWave) band (eg, 28 GHz, 30 GHz, 38 GHz, and 60 GHz). At this time, in order to improve the channel gain, the BS 110, the terminal 120, and the terminal 130 may perform beamforming. Beamforming may include transmit beamforming and receive beamforming. That is, the BS 110, terminal 120, and terminal 130 may assign directionality to the transmitted signal and the received signal. To this end, the BS 110 and the terminals 120 and 130 may select the serving beams 112, 113, 121, and 131 through a beam search procedure or a beam management procedure. Thereafter, communication may be performed using resources that have a quasi co-located relationship with the resources carrying the serving beams 112, 113, 121, and 131.

If the large-scale characteristics of the channel on which the symbols on the first antenna port are transmitted can be inferred from the channel on which the symbols on the second antenna port are transmitted, the first antenna port and the second antenna port are quasi-colocated. is considered to be in Large-scale characteristics may include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters.

Figure 2 illustrates a BS of a wireless communication system according to various embodiments of the present disclosure. The structure illustrated in FIG. 2 may be understood as the structure of the BS 110. The terms "-module", "-unit" or "-unit" used below may refer to a unit for processing at least one function or operation and may be implemented as hardware, software, or a combination of hardware and software. You can.

Referring to FIG. 2, the BS may include a wireless communication interface 210, a backhaul communication interface 220, a storage unit 230, and a controller 240.

The wireless communication interface 210 performs a function of transmitting and receiving signals through a wireless channel. For example, the wireless communication interface 210 may perform a conversion function between baseband signals and bitstreams according to the physical layer standard of the system. For example, when transmitting data, wireless communication interface 210 generates complex symbols by encoding and modulating transmitted bitstreams. Additionally, upon receiving data, the wireless communication interface 210 demodulates and decodes the baseband signal to reconstruct the received bitstreams.

Additionally, the wireless communication interface 210 up-converts the baseband signal into an RF (Radio Frequency) band signal and transmits it through an antenna, and then down-converts the RF band signal received through the antenna into a baseband signal. To this end, the wireless communication interface 210 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter, etc. Additionally, the wireless communication interface 210 may include a plurality of transmission/reception paths. Additionally, the wireless communication interface 210 may include at least one antenna array comprised of a plurality of antenna elements.

In terms of hardware, the wireless communication interface 210 may include a digital unit and an analog unit, and the analog unit may include a plurality of sub-units according to operating power, operating frequency, etc. The digital unit may be implemented as at least one processor (eg, a digital signal processor (DSP)).

The wireless communication interface 210 transmits and receives signals as described above. Accordingly, wireless communication interface 210 may also be referred to as a “transmitter,” “receiver,” or “transceiver.” Additionally, in the following description, transmission and reception performed through a wireless channel may be used to mean processing performed by the wireless communication interface 210 as described above.

The backhaul communication interface 220 provides an interface for communicating with other nodes in the network. That is, the backhaul communication interface 220 converts bitstreams transmitted from the BS to other nodes, for example, other access nodes, other BSs, upper nodes, or core networks, into physical signals, and converts the physical signals received from other nodes into bits. Convert to streams.

The storage unit 230 stores data such as basic programs, applications, and setting information for operation of the BS 110. Storage unit 230 may include volatile memory, non-volatile memory, or a combination of volatile and non-volatile memory. Additionally, storage unit 230 provides stored data in response to requests from controller 240.

The controller 240 controls the overall operation of the BS. For example, the controller 240 transmits and receives signals through the wireless communication interface 210 or the backhaul communication interface 220. Additionally, the controller 240 writes data to the storage unit 230 and reads the written data. The controller 240 may perform protocol stack functions required by communication standards. According to another embodiment, a protocol stack may be included in the wireless communication interface 210. To this end, the controller 240 may include at least one processor. According to various embodiments, the controller 240 may include commands/codes that temporarily exist in the controller 240, a storage space for storing commands/codes, or a portion of a circuit of the controller 240.

According to an exemplary embodiment of the present disclosure, the controller 240 detects a synchronization signal block, performs a downlink synchronization process according to the detected synchronization signal block, determines the time-frequency resource of the anchor subband, and determines the anchor subband. Obtain random access configuration information according to the time-frequency resources of the subband, perform a random access process according to the random access configuration information, complete uplink synchronization, obtain control information in the control channel band, and also control Depending on the information, data communication with the base station can be performed in the data transmission band. For example, the controller 240 may control the base station to perform operations according to example embodiments of the present disclosure.

Figure 3 illustrates a terminal in a wireless communication system according to various embodiments of the present disclosure. The structure illustrated in FIG. 3 may be understood as the structure of the terminal 120 or the terminal 130. The terms "-module", "-unit" or "-unit" used below may refer to a unit that processes at least one function or operation, and may be implemented as hardware, software, or a combination of hardware and software. You can.

Referring to FIG. 3 , the terminal 120 includes a communication interface 310, a storage unit 320, and a controller 330.

The communication interface 310 performs a function of transmitting/receiving signals through a wireless channel. For example, the communication interface 310 performs a conversion function between baseband signals and bitstreams according to the system's physical layer standard. For example, when transmitting data, communication interface 310 generates complex symbols by encoding and modulating the transmitted bitstreams. Additionally, upon receiving data, communication interface 310 reconstructs the received bitstreams by demodulating and decoding the baseband signal. Additionally, the communication interface 310 up-converts the baseband signal into an RF band signal and transmits it through an antenna, and then down-converts the RF band signal received through the antenna into a baseband signal. For example, the communication interface 310 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a DAC, and an ADC.

Additionally, the communication interface 310 may include a plurality of transmission/reception paths. Additionally, the communication interface 310 may include at least one antenna array comprised of a plurality of antenna elements. In terms of hardware, the wireless communication interface 210 may include digital circuitry and analog circuitry (eg, radio frequency integrated circuit (RFIC)). The digital circuit and analog circuit may be implemented as one package. The digital circuit may be implemented as at least one processor (eg, DSP). Communication interface 310 may include multiple RF chains. The communication interface 310 may perform beamforming.

The communication interface 310 transmits and receives signals as described above. Accordingly, communication interface 310 may also be referred to as a “transmitter,” “receiver,” or “transceiver.” Additionally, in the following description, transmission and reception performed through a wireless channel are used to mean that they include processing performed by the communication interface 310 as described above.

The storage unit 320 stores data such as basic programs, applications, and setting information for operation of the terminal 120. Storage unit 320 may include volatile memory, non-volatile memory, or a combination of volatile and non-volatile memory. Additionally, storage unit 320 provides stored data in response to requests from controller 330.

The controller 330 controls the overall operation of the terminal 120. For example, the controller 330 transmits and receives signals through the communication interface 310. Additionally, the controller 330 writes data to the storage unit 320 and reads the written data. The controller 330 may perform protocol stack functions required by communication standards. According to another embodiment, a protocol stack may be included in the communication interface 310. To this end, the controller 330 may include at least one processor or microprocessor, or may perform part of a processor. Additionally, a portion of the communication interface 310 or the controller 330 may be referred to as a communication processor (CP). According to various embodiments, the controller 330 may include commands/codes that temporarily exist in the controller 330, a storage space for storing commands/codes, or a portion of a circuit of the controller 330.

According to exemplary embodiments of the present disclosure, the controller 330 detects a synchronization signal block, performs a downlink synchronization process according to the detected synchronization signal block, determines time-frequency resources of the anchor subband, and determines the anchor subband. Obtain random access configuration information according to the time-frequency resources of the subband, perform a random access process according to the random access configuration information, complete uplink synchronization, obtain control information in the control channel band, and control information. Accordingly, data communication with the base station can be performed in the data transmission band. For example, the controller 330 may control the terminal to perform operations according to example embodiments of the present disclosure.

Figure 4 illustrates a communication interface of a wireless communication system according to various embodiments of the present disclosure. FIG. 4 shows an example of the detailed configuration of the communication interface 210 of FIG. 2 or the communication interface 310 of FIG. 3. More specifically, FIG. 4 shows elements for performing beamforming as part of the communication interface 210 of FIG. 2 or the communication interface 310 of FIG. 3.

Referring to FIG. 4, the communication interface 210 or 310 includes encoding and circuitry 402, digital circuitry 404, a plurality of transmission paths 406-1 to 406-N, and analog circuitry 408. .

Encoding and circuitry 402 performs channel encoding. For channel encoding, at least one of a low-density parity check (LDPC) code, a convolutional code, and a polar code may be used. Encoding and circuitry 402 generates modulation symbols by performing constellation mapping.

Digital circuit 404 performs beamforming on digital signals (e.g., modulation symbols). To this end, digital circuit 404 multiplies the modulation symbols by beamforming the weights. Beamforming weights can be used to change the magnitude and phase of a signal and may be referred to as a “precoding matrix” or “precoder”. The digital circuit 404 outputs digitally beamformed modulation symbols to a plurality of transmission paths 406-1 to 406-N. At this time, depending on the Multiple Input Multiple Output (MIMO) transmission method, modulation symbols may be multiplexed or the same modulation symbols may be provided to a plurality of transmission paths 406-1 to 406-N.

A plurality of transmission paths 406-1 to 406-N convert digitally beamformed digital signals into analog signals. To this end, each of the plurality of transmission paths 406-1 to 406-N may include an inverse fast Fourier transform (IFFT) calculation unit, a Cyclic Prefix (CP) insertion unit, a DAC, and an upconversion unit. The CP insertion unit is for the OFDM (orthogonal frequency division multiplexing) method, and may be omitted when another physical layer method (eg, filter bank multiple carrier: FBMC) is applied. That is, the plurality of transmission paths 406-1 to 406-N provide independent signal processing processes for multiple streams generated through digital beamforming. However, depending on the embodiment, some of the elements of the plurality of transmission paths 406-1 to 406-N may be commonly used.

The analog circuit 408 performs beamforming on analog signals. To this end, the digital circuit 404 multiplies the analog signals by beamforming the weights. Beamformed weights are used to change the magnitude and phase of the signal. More specifically, depending on the connection structure between the plurality of transmission paths 406-1 to 406-N and the antennas, the analog circuit 408 may be configured in various ways. For example, each of the plurality of transmission paths 406-1 to 406-N may be connected to one antenna array. In another example, multiple transmission paths 406-1 through 406-N may be connected to one antenna array. In another example, a plurality of transmission paths 406-1 to 406-N may be adaptively connected to one antenna array, or may be connected to two or more antenna arrays.

Methods according to embodiments mentioned in the claims and/or detailed description of the present disclosure may be implemented in hardware, software, or a combination of hardware and software.

When the methods are implemented by software, a computer-readable storage medium may be provided for storing one or more programs (software modules). One or more programs stored in a computer-readable storage medium may be configured to be executed by one or more processors in an electronic device. At least one program may include instructions that cause the electronic device to perform methods according to various embodiments of the present disclosure as defined by the appended claims and/or disclosed herein.

Programs (software modules or software) may include random access memory and flash memory, read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disk storage, compact disc-ROM (CD-ROM), and DVD. It may be stored in non-volatile memories, including a digital versatile disc or other types of optical storage devices or magnetic cassettes. Alternatively, any combination of some or all may form the memory in which the program is stored. Additionally, a plurality of such memories may be included in an electronic device.

Additionally, programs may be stored on an attached storage device accessible through a communications network, such as the Internet, an intranet, a local area network (LAN), a wide area network (WAN), and a storage area network (SAN), or a combination thereof. These storage devices can be accessed by electronic devices through external ports. Additionally, a separate storage device on a communications network may access the portable electronic device.

In the above-described specific embodiments of the present disclosure, elements included in the present disclosure are expressed in singular or plural numbers depending on the specific embodiment presented. However, the singular or plural forms are selected for convenience of description appropriate to the presented situation, and the various embodiments of the present disclosure are not limited to a single element or multiple elements. Additionally, multiple elements expressed in this specification may be composed of one element, and a single element of this specification may be composed of multiple elements.

Although the present disclosure has been shown and described with reference to specific embodiments, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of the disclosure. Accordingly, the scope of the present disclosure should not be limited to the embodiments but should be defined by the appended claims and their equivalents.

Although the present disclosure has been described as an exemplary embodiment, various changes and modifications may occur to those skilled in the art. This disclosure is intended to cover such changes and modifications as fall within the scope of the appended claims.

The rapid development of the information industry, especially the increasing demand for mobile Internet and IoT (Internet of Things), is posing unprecedented challenges to future mobile communication technologies. For example, according to ITU-R M. published by the international telecommunication union (ITU), by 2020, mobile service traffic will increase nearly 1,000 times compared to the 4G era, and the number of user device connections will exceed 17 billion. It is expected that, as the vast number of IoT devices gradually expand into mobile communication networks, the number of connected devices will further increase. In response to these unprecedented challenges, the telecommunications industry and academia have conducted extensive research on fifth generation (5G) mobile communications technology. Currently, the framework and overall goals of future 5G are being discussed in the ITU's ITU-R M. report, which details 5G's demand outlook, application scenarios and various important performance indicators. In terms of the new demands of 5G, ITU-R M. of ITU provides information related to 5G technology trends, which include system throughput, consistency of user experience, IoT, delay, energy efficiency, cost, network flexibility, support for new services and It addresses important issues such as significant improvements in scalability, supporting flexible spectrum utilization, etc.

Dual mode in wireless communication, which is an important basis for designing air interfaces in wireless communication, refers to the processing mode of two-way data communication for uplink and downlink, and the development of 5G is no exception. Currently, frequency division duplex (FDD) and time division duplex (TDD) are the two main duplex modes, and E-UTRA (E-UTRA) established by the 3rd generation partnership project (3GPP) and IEEE802.11A/g wireless local area net (WLAN) It is widely applied in the fields of audio broadcast, video broadcast and civil communication systems, such as long term evolution (LTE) systems corresponding to the evolved universal terrestrial radio access (evolved universal terrestrial radio access) protocol.

In FDD mode, uplink and downlink perform communication using paired frequency resources that satisfy a specific duplex interval; In TDD mode, uplink and downlink share the same frequency resource, and uplink communication and downlink communication are divided into different time resources. Different duplex modes result in different designs of the physical layer of the wireless interface, such as the frame structure. Taking LTE as an example, two frame structures that can be applied to FDD mode and TDD mode are specified in LTE.

In the FDD mode frame structure as shown in FIG. 5, one 10-ms wireless frame consists of 10 1-ms subframes, each of which consists of two time slots of 0.5-ms. Uplink communication and downlink communication are performed on different frequency resources.

In the TDD mode frame structure as shown in FIG. 6, similar to the FDD mode frame structure, one 10-ms radio frame consists of 10 1-ms subframes; Unlike the FDD mode frame structure, uplink communication and downlink communication in TDD mode share the same frequency resources differentiated by time resources. For example, in the configuration of Figure 6, subframes 0 and 5 are used for downlink communication, and subframes 2, 3, 4, 7, 8, and 9 are used for uplink communication. In order to prevent downlink communication from affecting uplink communication, a specific subframe is introduced into the TDD mode frame structure, that is, subframes 1 and 6 in FIG. 6. A specific subframe consists of three domains: downlink pilot time slot (DwPTS), guard period (GP), and uplink pilot time slot (UpPTS). In the TDD mode frame structure, subframes 1 and 5 and DwPTS are always used for downlink transmission, and UpPTS and the subframes following UpPTS are always used for uplink transmission. GP is a guard interval between downlink communication and uplink communication, preventing uplink data communication from being affected by downlink communication. The TDD mode in LTE is flexibly configured and can therefore support asymmetric services between uplink and downlink data communication. Table 1 shows various TDD mode configurations in LTE, where D indicates that the subframe is used for downlink communication, U indicates that the subframe is used for uplink communication, and S indicates a specific subframe.

Table 1: Uplink-downlink configuration in TDD mode of LTE

Here, the two dual modes each have their own advantages. Specifically, in the case of FDD mode, uplink and downlink data communication must be performed in paired frequency bands, and pairing of uplink and downlink frequencies must satisfy a specific duplex interval, which is 5G's high frequency and large bandwidth. When developed, spectral fragments are easily generated in terms of spectrum division; In the case of TDD mode, uplink and downlink data communication is performed using the same frequency band, so TDD mode is advantageous in terms of flexibility in frequency resource utilization, can provide more support for asymmetric services, and has higher It has spectral efficiency. In the case of FDD, since it is a paired spectrum, there are always available resources in uplink and downlink resources, thus, for example, ACK/NACK (acknowledge/non-acknowledge) of HARQ (hybrid automatic retransmission request) Scheduling and terminal feedback of uplink control signaling, such as information and channel state information (CSI), can be more timely, thereby reducing the feedback delay of the wireless interface and improving scheduling efficiency; In the case of TDD, not only does the different uplink and downlink slot configurations lead to more complex related designs, but also because the TDD mode is advantageous in the channel reciprocity of uplink and downlink, the acquisition of CSI can be greatly simplified. .

Massive MIMO technology can be adopted in 5G to further improve spectral efficiency, many antennas are provided on the base station side, and many resources are required for downlink physical channel training and feedback of channel state information under FDD mode, while TDD Under this mode, channel reciprocity can be used to reduce the overhead of training and feedback, making TDD mode more attractive for massive MIMO technology. However, since low delay is required, the transmission time interval (TTI) of the wireless interface must be further shortened and control signaling must be more timely, making the design of TDD mode more complex.

As can be seen from the above analysis, FDD mode and TDD mode have unique advantages as 5G faces various application situations and the use of new frequency bands, and to ensure spectrum utilization and network performance in 5G, FDD mode There is a need to design a new dual mode that integrates the advantages of TDD and TDD modes.

Because the duplex mode in LTE is inflexible, the FDD mode requires paired spectrum, and the scheduling process and HARQ process in the TDD mode are quite complex, if the current duplex mode is continued to be used, the spectral efficiency of the system and performance cannot be improved any further.

The random access process is an important step in a wireless communication system, and is used to establish uplink synchronization between a terminal and a base station and to assign an ID to the base station to identify the terminal. The performance of random access directly affects the terminal experience. For existing wireless communication systems such as long term evolution (LTE) and long term evolution-advanced (LTE-A), the random access process involves initial link establishment, cell handover, uplink reconfiguration, and radio resource control (RRC) connection. It is applied to several scenarios such as reset, and is classified into contention-based random access and contention-free random access depending on whether the terminal fully occupies preamble resources. In contention-based random access, since terminals select respective preambles from the same preamble resources in the process of establishing uplink links, multiple terminals may select the same preamble to be transmitted to the base station. These collisions may lead to preamble transmission failure. How to design a random access preamble retransmission method to improve the success probability of random access preamble retransmission is a key factor affecting random access performance.

The contention-based random access process in LTE-A includes four steps: Before the random access process starts, the base station transmits configuration information of the random access process to the terminal, and the terminal performs the random access process according to the received configuration information.

In step 1, the terminal randomly selects a preamble from the preamble resource pool and transmits it to the base station; The base station performs correlation detection on the received signal to identify the preamble transmitted by the terminal.

In step 2, the base station transmits a random access response (RAR) to the terminal, which includes a random access preamble identifier, a timing advance command determined based on the delay estimate between the terminal and the base station, and a temporary TC-RNTI (TC-RNTI). cell-radio network temporary identifier) and time-frequency resources allocated for the terminal's next uplink transmission.

In step 3, the terminal transmits message 3 (abbreviated as MSg3) to the base station according to the information in the RAR. MSg3 includes information such as a terminal identifier and RRC link request to identify the terminal. The terminal identifier is a unique identifier for the terminal for resolving conflicts.

In step 4, the base station transmits a collision resolution identifier including the terminal identifier of the terminal that has undergone collision resolution to the terminal. After detecting its own identifier, the terminal upgrades the temporary cell-radio network temporary identifier to the cell-radio network temporary identifier (abbreviated as C-RNTI), and sends an acknowledgment (abbreviated as ACK) signal to the base station. After completing the random access process, it waits for scheduling by the base station; otherwise, the terminal starts a new random access process after a delay.

In the case of a contention-free random access process, since the base station knows the terminal identifier, it can assign a preamble to the terminal. Therefore, when the terminal wants to transmit a preamble, there is no need to randomly select the preamble, and this allocated preamble can be used. After detecting the assigned preamble, the base station may transmit a corresponding RAR containing information such as timing advance and uplink resource allocation. After receiving the RAR, the terminal considers uplink synchronization to be complete and waits for additional scheduling by the base station. Therefore, the process of initial access and contention-free random access includes only two steps: a first step of transmitting a preamble; and the second step of sending the RAR.

In the first step, the base station transmits a preamble, and the transmit power determination process includes the following steps:

1. Set the random process preamble power PREAMBLE_RECEIVED_TARGET_POWER expected to be received by the base station to preambleInitialReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_TRANSMISSION_COUNTER-1)*powerRampingStep, where preambleInitialReceivedTargetPower is the initial power configured by the upper layer, and DELTA_PREAMBLE is the preamble song is the new power offset , PREAMBLE_TRANSMISSION_COUNTER is the number of random process attempts (including initial attempt and subsequent retries), and powerRampingStep is the power ramping step configured by the upper layer.

2. The final random access preamble is min{ , PREAMBLE_RECEIVED_TARGET_POWER+ }, where is the maximum transmit power of the terminal (23 dBm in LTE/LTE-A), is the path loss value.

Specifically, the correspondence between the transmit power offset PREAMBLE_RECEIVED_TARGET_POWER and the random access preamble format is shown in Table 2:

Table 2 Correspondence table of preamble format and DELTA_PREAMBLE

The terminal obtains the DELTA_PREAMBLE value based on the preamble format indicated by prach-ConfigIndex in the random access configuration and the corresponding relationship in Table 2, and determines the final transmission power value based on this.

Future wireless communication systems can be roughly classified into two categories based on their carrier range: below 6 GHz and above 6 GHz. Additionally, in future wireless communication systems, the subcarrier spacing of the random process channel may be 1.25 kHz, 5 kHz, 15 kHz, 30 kHz, 60 kHz, or 120 kHz; The length of the preamble in the random access process may be L=839 or L=139. In this case, the number of preamble formats in the random access process of a future wireless communication system may be greater than 40. If transmit power offsets with only three different values as shown in Table 2 above are continuously used, the requirements of the random access process in future wireless communication networks cannot be met. Therefore, in future wireless communication systems, there is a need to design new transmission power offsets for new random access preamble formats designed based on new carrier ranges and subcarrier spacing sizes, and determine random access preamble transmission power.

In this disclosure, a communication method based on a frame structure is provided, including the following steps:

Step 1: Downlink synchronization: The terminal completes downlink synchronization through the downlink synchronization process, reads the downlink transmission part of the anchor subband to obtain the system bandwidth and bandwidth structure, and accordingly determines the location and bandwidth of the anchor subband. Determine information such as time structure, location of uplink control channel and downlink control channel, and bandwidth of guard band.

Step 2: Uplink random access: The terminal completes the random access process by transmitting a preamble sequence through the uplink transmission part in the anchor subband.

Step 3: After completing the access process, the terminal communicates with the base station in the corresponding band.

In the communication method, a frame structure as shown in Figure 7 is adopted, which consists of four frequency bands: a control channel band close to the band edge, an anchor subband at the center of the band, and data transmission It consists of a band and a guard band.

Here, the transmitted content in the band-centric anchor subband is fixed. This transmission content includes downlink transmission content required for an access system such as a downlink synchronization signal, a downlink broadcast channel, and uplink transmission content required for an access system such as a random access channel.

The control channel band transmits an uplink control channel and a downlink control channel in frequency division mode or time division mode.

The data transmission band transmits uplink/downlink data in frequency division mode, time division mode, or MDD (Multi-carrier Division Duplexing) mode.

At the same time, guard bands and/or guard times are inserted between adjacent bands to ensure low interference between adjacent bands and reliability of data transmission on the control channel and anchor subband.

The communication method based on the frame structure provided in the present disclosure, which is based on the above-described communication method and the frame structure of FIG. 7, will be described mainly based on the terminal side and the base station side, respectively.

As shown in Figure 8, the communication method based on the frame structure provided by the present disclosure includes the following steps:

Step 801: Detecting a synchronization signal block, performing downlink synchronization processing with the base station according to the detected synchronization signal block, and determining time-frequency resources of the anchor subband.

Step 802: Obtain random access configuration information according to the time-frequency resources of the anchor subband, perform a random access process according to this random access configuration information, and complete uplink synchronization.

In this step, the step of obtaining random access configuration information according to the time-frequency resources of the anchor subband is:

detecting a system information block in the anchor subband after detecting a first preset time interval of the synchronization signal block; and

and obtaining random access configuration information carried in the detected system information block.

Alternatively, the step of obtaining random access configuration information according to the time-frequency resources of the anchor subband is:

Determining the location of the anchor subband according to the result of downlink synchronization processing and obtaining a master information block carried by the broadcast channel in the synchronization signal block; and

The method may further include obtaining random access configuration information carried in the master information block.

Alternatively, the step of obtaining random access configuration information according to the time-frequency resources of the anchor subband is:

Determining the location of the anchor subband according to the result of downlink synchronization processing and obtaining a master information block carried by the broadcast channel in the synchronization signal block; and

The method may further include determining a system information block according to the master information block and obtaining random access configuration information returned in the system information block.

In the above step, the step of determining the system information block according to the master information block is,

Obtaining a time-domain index of the system information block indicated in the master information block;

determining the location of the time-frequency resource of the system information block according to the time-domain index; and

It may include determining a system information block in the anchor subband according to the location of the time-frequency resource.

Here, the system information block is transmitted in the anchor subband or data transmission band. In this step, performing a random access process according to the random access configuration information includes:

According to the random access configuration information, transmitting a random access preamble sequence to the base station through an uplink anchor subband;

When detecting a random access response, transmitting message 3 on the uplink anchor subband; and

and detecting contention resolution in the downlink anchor subband.

Alternatively, performing a random access process according to the random access configuration information includes:

According to the random access configuration information, transmitting a random access preamble sequence to the base station through an uplink anchor subband;

Detecting control information of an uplink anchor subband used to transmit a random access preamble sequence in a downlink control channel, and detecting and decoding a random access response in the downlink data transmission band indicated by the control information;

When a random access response including a preamble sequence identifier matching the transmitted random access preamble sequence is detected, transmitting message 3 in the uplink data transmission band; and

and detecting contention resolution in the downlink data transmission band.

Step 803: Obtaining control information in the control channel band and performing data communication with the base station in the data transmission frequency band.

In this step, the step of obtaining control information in the control channel band and performing data communication with the base station in the data transmission frequency band according to this control information includes two parts: uplink data communication and downlink data communication; ;

Here, detecting in the downlink control channel, when detecting downlink control information transmitted to the self, receiving downlink data in the corresponding downlink data transmission band according to the resource allocation indication transmitted in the downlink control information. ; and

When transmitting a scheduling request in the uplink control channel, detecting in the downlink control channel after a second preset time interval, and detecting the downlink control information sent to it, the uplink resource returned in the downlink control information Allocating uplink data in the corresponding uplink data transmission band according to the allocation indication.

This method:

It further includes obtaining a configuration index of the guard band and/or guard time transmitted by the base station, and setting according to the configuration index to provide protection when performing data communication with the base station.

The present disclosure further provides a communication method based on a frame structure. As shown in Figure 9, this method includes:

Step 901: Performing a random access process with the terminal according to the random access configuration information transmitted by the terminal through the anchor subband.

Here, the steps of performing a random access process with the terminal according to the random access configuration information transmitted by the terminal through the anchor subband include:

Receiving random access configuration information carrying a random access preamble sequence transmitted by the terminal on an uplink anchor subband;

performing a random access process according to the random access preamble sequence and transmitting a random access response;

detecting message 3 in the uplink anchor subband; and

and transmitting contention resolution on a downlink anchor subband.

Alternatively, performing a random access process with the terminal according to the random access configuration information transmitted by the terminal through the anchor subband includes:

Receiving random access configuration information carrying a random access preamble sequence transmitted by the terminal on an uplink anchor subband;

Performing a random access process according to the random access preamble sequence, transmitting control information of the uplink anchor subband used by the random access preamble sequence in the downlink control channel, and transmitting a random access response in the downlink data transmission band. step;

Detecting message 3 in the uplink data transmission band; and

and transmitting contention resolution in the downlink data transmission band.

Step 902: Performing data communication with the terminal in the data transmission band.

In this step, performing data communication with the terminal in the data transmission band includes two parts: uplink data communication and downlink data communication; here

Transmitting downlink control information in the downlink control channel so that the terminal detects the downlink control information in the downlink control channel;

Receiving a scheduling request on an uplink control channel and transmitting downlink control information on the downlink control channel, so that the terminal detects downlink control information on the downlink control channel.

Here, this method:

It further includes transmitting a configuration index of the guard band and/or guard time, so as to provide protection according to the configuration index when the terminal performs data communication.

The present disclosure further provides a frame structure applied to a communication method based on the above-described frame structure, wherein the frame structure includes three bands, namely a control channel band, an anchor subband and a data transmission band;

Here, downlink transmission contents carrying synchronization information blocks and/or uplink transmission contents carrying random access configuration information are included in the anchor subband;

The control channel band is used to transmit an uplink control channel and/or a downlink control channel; also

The data transmission band is used to transmit uplink data and/or downlink data.

Preferably, the frame structure further includes a guard band and/or guard time provided between the bands to separate adjacent bands to provide protection during data communication.

With respect to the communication method based on the frame structure provided by the present disclosure, the communication method is specifically described in the following three specific embodiments.

Example 1

In this embodiment, a communication method based on a frame structure is introduced in combination with a specific system. The channel frame structure adopted in this embodiment is as shown in FIG. 10, which is the configuration of one radio frame. In this embodiment, one radio frame consists of a plurality of subframes, each subframe consists of a plurality of symbols, one symbol includes a plurality of subcarriers, and the subcarriers have functions. It is divided into different subbands accordingly. In Figure 10, these subbands are: Control Channel 1 and Control Channel 2 located at the band edge, representing, depending on their functions, an uplink control channel and a downlink control channel, or a downlink control channel and an uplink control channel, respectively; an anchor subband located in the center of the band, used to transmit uplink and downlink data required for system access; a data channel located between the control channel and the anchor subband, used to transmit uplink data and downlink data; and a guard band located between the subbands.

Here, the anchor subband performs switching between the downlink channel and the uplink channel on a subframe or subframe group basis consisting of a plurality of subframes. The downlink channel within the anchor subband is used to transmit a synchronization signal block consisting of a broadcast channel, a synchronization signal, etc., for example, a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a broadcast channel. The uplink channel within the anchor subband is used to transmit a random access channel, etc. One possible method is that the anchor subbands of some fixed subframes are dedicated to transmitting downlink synchronization signal blocks. Taking a radio frame containing 7 subframes (each subframe named subframe 0 to subframe 6 respectively), subframe 0 is fixed to transmit the downlink anchor subband, or subframe 0 and 4 is fixed for transmitting the downlink anchor subband, and the anchor subbands of other subframes are determined according to the configuration. A simple example is that the transmission directions of different subframes are known in a broadcast channel.

The control channel is located at the band edge, one side is a downlink control channel, and the other side is an uplink control channel. Using frequency hopping, downlink/uplink control channels alternate at the band edges. For example, the downlink control channel in even index subframes is at the upper edge of the band, and the uplink control channel is at the lower edge of the band; The downlink control channel of odd index subframes exists at the lower edge of the band, and the uplink control channel exists at the upper edge of the band. The frequency hopping mode, that is, the location where the uplink/downlink control channel is located, is configured by higher layer signaling or notified by the downlink control channel.

The data channel is located between the anchor subband and the control channel, and transmits uplink data and downlink data by adopting time division or subband frequency division to divide the uplink and downlink, or by adopting division at the subcarrier level. This is distinguished.

To prevent inter-band interference or uplink-downlink crosstalk, guard bands are added between different channels. While switching between uplink and downlink in the same subband, a guard time is added to protect the transition between uplink and downlink.

The terminal's processes for network and data communication are as follows:

1. The terminal performs downlink synchronization. That is, the terminal detects the synchronization signal block by blind detection. After detecting the synchronization signal block, the terminal can complete time and frequency domain synchronization to determine the location of the anchor subband. The terminal reads the master information block from the broadcast channel. Information read from the master information block should include the system bandwidth and the locations of the time-frequency resources of the system information block. The terminal has a master information block, including the transmission time location of the uplink portion on the anchor subband, random access channel configuration information, configuration information of the random access preamble resource pool, and the bandwidth of each subband, that is, time-frequency resource location. Other information required for access is read from the system information block indicated by .

It should be noted that the above-described system information block indicated by the master information block may be located on the downlink anchor subband, for example, at a time delayed by a fixed time sequence than the synchronization signal block. In this case, the master information block does not need to indicate the time-frequency position of the system information block, and after detecting the synchronization signal block, the terminal detects the system information block in the downlink anchor subband after a fixed or preset time or ; Alternatively, the master information block only notifies the delay of the system information block with respect to the synchronization signal block or time-domain index, and the terminal determines the position of the system information block according to the delay or time-domain index.

In another scheme, the system information block indicated by the master information block is located on the data channel, and the master information block should indicate the time-frequency resource location of the system information block. After reading the master information block, the terminal reads the time-frequency resource location of the system information block, and reads the system information block from the time-frequency resource location. The above two methods are shown in Figures 11A and 11B.

The terminal determines the location and bandwidth of each subband and the bandwidth of the guard band through the contents of the system information block. One possible method is to notify, in the system information block, the control channel bandwidth at the band edge and the switch points of the downlink/uplink control channel in the radio frame/subframe. For example, the terminal learns the number of physical resource blocks in the system through the system bandwidth in the master information block. Then, the terminal learns the number of physical resource blocks required for the downlink/uplink control channel according to the bandwidth of the downlink control channel/uplink control channel, and the time of the control subband located in the band through the switch point information - Obtain the frequency structure.

A simple example is as follows: a downlink control channel is transmitted in the control subband, in the first subframe of a radio frame located at the upper edge of the band; An uplink control channel is transmitted in the control subband, in the first subframe of the radio frame located at the lower edge of the band; It is assumed that one radio frame consists of 7 subframes, each consisting of 14 symbols. And it is assumed that a switch time of one symbol is required during switching between downlink and uplink. Through the information in the system information block, it can be seen that the number of physical resource blocks occupied by the control subband is 3, and the number of switch points of the downlink/uplink control channel in the radio frame is 1. The control channel of the band edge is as shown in FIG. 12. Another possible method is to pre-configure several possible uplink and downlink configurations of the control channel in the form of an index table, and the corresponding uplink and downlink configurations of the control channel are notified in the system information block.

Similarly, the terminal determines the distribution of uplink and downlink subbands for the anchor subband through the contents of the system information block. For example, it is configured by announcing a radio frame or switch point in a subframe, or by prefixing the uplink and downlink to announce the index. Another possible way is that the uplink and downlink configurations in the anchor subband are the same as those in the control subbands at the upper edge of the band or those in the control subbands at the lower edge of the band. In this case, only the uplink and downlink configurations of the control subband need to be notified.

2. The terminal performs a random access process. The terminal determines the frame structure, reads the random access channel configuration information and preamble sequence resource pool information, and then performs the random access process.

There are two ways to perform the random access process:

a. The random access process is performed only in the anchor subband. Specifically, the terminal transmits a preamble sequence through a random access channel located in the uplink anchor subband. Then, detection of the random access response is performed at a designated location on the downlink anchor subband. If the random access response is successfully detected, message 3 is transmitted at the designated location on the uplink anchor subband, and finally detection of the contention resolution message is performed at the designated location on the downlink anchor subband.

Specifically, the anchor subband structure consists of two parts, an uplink slot and a downlink slot, as shown in FIG. 13. Here, the downlink slot includes a synchronization signal block and a downlink data transmission portion; The uplink slot includes a random access channel and an uplink data transmission portion. Each downlink slot may be composed of a plurality of synchronization signal blocks and a plurality of downlink data transmission parts for transmitting a random access response and contention resolution message. Each uplink slot may include a plurality of random access channels for transmitting message 3 and a plurality of uplink data transmission portions.

In order to facilitate detection of the random access response, a common downlink control channel is added to the downlink data transmission portion to indicate whether there is a random access response corresponding to the subsequent downlink data transmission portion. One possible method is for a common downlink control channel to be transmitted at a fixed location (e.g., the first one to three symbols) by each subframe of the downlink data transmission portion.

b. The random access process may be performed in subbands other than anchor subbands. In this configuration, the random access preamble is still transmitted in the uplink anchor subband, but other steps may be performed in subbands other than the anchor subband.

Specifically, after transmission of the preamble sequence is completed, the terminal detects a random access response in a fixed or predetermined/configured slot. When control information scrambled by the Routing Area-Radio Network Temporary Identity (RA-RNTI) of the random access channel used to transmit the preamble sequence is detected on the downlink control channel, a random access response is detected and the downlink signal indicated by the control information is detected. Decoded in the link data transmission band. When a random access response containing a preamble sequence identifier matching the transmitted preamble sequence is detected, message 3 is transmitted in the corresponding uplink data transmission band according to the uplink resource allocation information indicated in the random access response. Finally, transmission of a contention resolution message is detected in the downlink data channel.

In this way, both the control subband and the data transmission band will be used while completing the random access process. Considering the random access response, Message 3 and contention resolution information are transmitted based on the scheduled data, so the spectrum utilization efficiency in this way is rather high in terms of initial access.

The downlink data communication process is as follows:

The terminal performs blind detection on the downlink control channel, and when detecting downlink control information transmitted to the terminal, downlink data is transmitted in the corresponding downlink data transmission band according to the resource allocation indication included in the downlink control information. Receive.

The uplink data communication process is as follows:

The terminal transmits scheduling request information through an uplink control channel. After transmitting the scheduling request, the terminal detects whether there is downlink control information transmitted to the terminal in the downlink control channel after a fixed time or a predetermined time. When the corresponding downlink control information is detected, uplink data is allocated to the corresponding uplink data transmission band according to the uplink resource allocation information included therein, and a schematic flowchart of the uplink data communication process is shown in Figure 14. As shown.

It should be noted that subframes are used as time units in this embodiment. However, in an actual system, the subframes in the above description may be replaced with slots, mini-slots or symbols as time units of the frame structure and data communication flow in this embodiment.

Additionally, it should be noted that in the data transmission band, control subband, and anchor subband for transmitting uplink data and downlink data, a reference signal needs to be inserted to estimate an effective channel.

Example 2

In this embodiment, a communication method based on a frame structure is introduced in combination with a specific system. The channel frame structure adopted in this embodiment is as shown in FIG. 10.

In this embodiment, when subband-level frequency division multiplexing is combined with time division multiplexing, the data subband is divided into a plurality of transmission occasions for transmission of downlink and uplink data.

A simple example is as shown in Figure 15, where different transmission occasions consist of time unit groups consisting of a plurality of subframes/slots/mini-slots/symbols in the time domain and a plurality of physical resource blocks in the frequency domain. They are used to transmit uplink or downlink data. In the frequency domain, a guard interval must be reserved between different transmission directions; In the time domain, a guard time must be reserved between different transmission directions, thereby ensuring that the residual interference and inter-symbol interference between adjacent bands are smaller in the frequency domain and time frequency.

When resource scheduling is performed, resource allocation is performed in the following way: Resource allocation on the frequency domain is completed by notifying the index of the physical resource block on the frequency domain. For example, one possible method is to allocate frequency-domain resources using a bitmap. Allocation of resources in the time domain is completed by notifying the allocated time unit index. For example, allocation of time-domain resources is completed by advertising the subframe index.

With the solution provided by this embodiment, there is switching in the uplink and downlink transmission directions in both the time domain and the frequency domain. To avoid interference between links, a guard band must be inserted when the transmission direction of uplink data and downlink data are switched in the frequency domain, and the transmission direction of uplink data and downlink data in the time domain. When switching, a guard time must be inserted. Insertion of the guard band and guard time into the frame structure provided in this embodiment can be completed by scheduling methods. Using a physical resource block as a basic unit, that is, using a guard band as one or multiple physical resource blocks, the base station can make unscheduled physical resource blocks into a guard band by not scheduling specific physical resource blocks. Similarly, for time-domain resources, these unscheduled time units can also cause guard time by not scheduling a particular subframe/slot/minislot/symbol.

Another way to insert the guard band and guard time is to insert the guard band and guard time by methods of configuration. For example, for a guard band, the number of subcarriers used for the guard band at the band edge location of the allocated time-frequency resources is defined in a predetermined manner. Alternatively, pre-configuration of multiple types of edge physical resource blocks is required to reserve the number of subcarriers used as a guard band, and the terminal provides notification in the form of an index through a downlink control channel or higher layer signaling configuration. Receive. A simple example is configuring the number of guard band subcarriers through the configuration table shown in Table 3.

Table 3: Configuration of the number of subcarriers reserved in the guard band

According to the configuration table shown in Table 3, the base station allocates resources and simultaneously notifies the index corresponding to the number of subcarriers for the guard band at the band edge. The terminal performs rate adaptation and data transmission according to the number of reserved subcarriers.

In the case of guard time, a predetermined number of symbols/slots/mini-slots reserved at the cutoff of allocated time resources can also be fixed as the guard time in a preset manner. Another possible method is to notify the guard time in the form of an index through a pre-configured index table containing several types of reserved time units. Possible methods are shown in Table 4.

Table 4: Configuration of the number of time units reserved for guard time

In the example shown in Table 4, the time unit may be a symbol/slot/mini-slot, etc. The terminal is notified of the index along with resource configuration information in a semi-static manner through a downlink control channel or through high-level signaling configuration. After obtaining information about the number of reserved time units, the terminal performs rate adaptation on the transmitted information according to this information and transmits information on the designated time-frequency resource.

Example 3

In this embodiment, a communication method based on a frame structure is introduced in combination with a specific system. In this embodiment, the location of the anchor subband may not be limited to the center of the entire band. In contrast, the anchor subband may be located near the control subband at the band edge.

One possible channel structure is as shown in Figure 16. In this example, the control subband is still located at the edge of the band, the anchor subband is located near the control subband on one side, and the downlink anchor subband is guaranteed to be adjacent to the downlink control channel. At the same time, the uplink anchor subband is adjacent to the uplink control channel. The remaining time-frequency resources are used to transmit data transmission band. The example shown in Figure 16 is an extreme example.

In other possible configurations, the anchored band is not located in the middle of the band, as shown in Figure 17.

For the channel structure shown in this embodiment, the communication flow between the terminal and the base station also needs to be adjusted correspondingly. Specifically, in the initial access process, the terminal initially accesses through the synchronization signal block in the downlink anchor subband, completes the downlink synchronization process, and receives system bandwidth information from the master information block in the broadcast channel of the corresponding synchronization signal block. and read the position where the anchor subband is located within the system band from the master information block or the system information block indicated by the master information block.

One possible method is to transmit an offset of the anchor subband center with respect to the center frequency in the master information block or in the system information block indicated by the master information block, where this offset value can be characterized by the number of physical resource blocks. there is. At the same time, the sign (positive or negative) of the offset value indicates the offset direction of the anchor subband with respect to the center frequency. This notification can be performed through the index table.

Another possible method is to indicate the position of the anchor subband in the overall system bandwidth by transmitting the index of the first physical resource block of the anchor subband in the master information block or the system information block indicated by the master information block.

The terminal obtains the frequency domain location of the anchor subband through downlink synchronization, and reads the offset value of the anchor subband with respect to the center frequency from the master information block or the system information block indicated by the master information block to determine the location of the overall system bandwidth. Decide. The structure of the overall system bandwidth is determined with notification of the system bandwidth structure in the master information block or system information block.

In the solution provided in this embodiment, the remaining communication flows including the random access process and uplink/downlink data communication steps can adopt the solutions provided in the above-described Embodiment 1 and Embodiment 2, and therefore, herein, the specific is not explained by

Based on the communication method based on the frame structure provided by the present disclosure, the present disclosure further provides a communication device based on the frame structure. As shown in Figure 18, the device includes:

a downlink processing unit 1801 configured to detect a synchronization signal block, perform downlink synchronization processing with the base station according to the detected synchronization signal block, and determine time-frequency resources of the anchor subband;

an uplink processing unit 1802, configured to obtain random access configuration information according to the time-frequency resources of the anchor subband, perform a random access process according to the random access configuration information, and complete uplink synchronization; and

A communication unit 1803 configured to obtain control information in the control channel band and perform data communication with the base station in the data transmission band.

Preferably, the uplink processing unit 1802 is configured to detect a system information block in the anchor subband after a first preset time interval, and obtain random access configuration information carried in the detected system information block. or,

The uplink processing unit 1802 determines the position of the anchor subband according to the result of downlink synchronization processing, and obtains the master information block carried by the broadcast channel in the synchronization signal block; It is further configured to obtain random access configuration information carried in the master information block. or,

The uplink processing unit 1802 determines the position of the anchor subband according to the result of downlink synchronization processing, and obtains the master information block carried by the broadcast channel in the synchronization signal block; It is further configured to determine a system information block according to the master information block, and obtain random access configuration information carried in the system information block.

Preferably, the uplink processing unit 1802 specifically obtains the time-domain index of the system information block indicated in the master information block, and determines the location of the time-frequency resource of the system information block according to the time-domain index; , It is configured to determine the system information block in the anchor subband according to the location of the time-frequency resource.

Here, the system information block is transmitted in the anchor subband or data transmission band.

Preferably, the uplink processing unit 1802 transmits a random access preamble sequence to the base station through the uplink anchor subband according to the random access configuration information, detects a random access response in the downlink anchor subband, and performs random access. When detecting a response, message 3 is transmitted in the uplink anchor subband and is configured to detect contention resolution in the downlink anchor subband.

The uplink processing unit 1802 transmits a random access preamble sequence to the base station through the uplink anchor subband according to the random access configuration information; detecting control information in an uplink anchor subband used to transmit a random access preamble sequence in a downlink control channel, and detecting and decoding a random access response in a downlink data transmission band indicated by the control information; If a random access response containing a preamble sequence identifier matching the transmitted random access preamble sequence is detected, message 3 is transmitted in the uplink data transmission band; and configured to detect contention resolution in a downlink data transmission band.

Preferably, the communication unit 1803 detects in the downlink control channel, and when detecting downlink control information transmitted to it, in the corresponding downlink data transmission band according to the resource allocation indication carried in the downlink control information. It is configured to receive downlink data, and also transmits a scheduling request on the uplink control channel, detects on the downlink control channel after a second preset time interval, and controls downlink when detecting downlink control information sent to itself. It is configured to allocate uplink data to a corresponding uplink data transmission band according to the uplink resource allocation indication carried in the information.

The configuration unit 1804 is configured to obtain a configuration index of the guard band and/or guard time transmitted by the base station, and is set to provide protection when performing data communication with the base station according to the configuration index.

The present disclosure further provides a communication device based on a frame structure. As shown in Figure 19, the device includes:

an uplink processing unit 1901 configured to perform a random access process with the terminal according to the random access configuration information transmitted by the terminal through the anchor subband; and

A communication unit 1902 configured to perform data communication with a terminal in a data transmission band.

Preferably,

The uplink processing unit 1901 receives random access configuration information, carrying a random access preamble sequence, transmitted by the terminal on the uplink anchor subband; Perform random access according to the random access preamble sequence and transmit a random access response; detect message 3 in the uplink anchor subband; It is configured to transmit contention resolution in the downlink anchor subband.

Alternatively, the uplink processing unit 1901 receives random access configuration information, carrying a random access preamble sequence, transmitted by the terminal on the uplink anchor subband; Perform random access according to the random access preamble sequence, transmit control information of the uplink anchor subband used by the random access preamble sequence in the downlink control channel, and transmit a random access response in the downlink data transmission band; Detect message 3 in the uplink data transmission band; It is also configured to transmit contention resolution in the downlink data transmission band.

Preferably, the communication unit 1902 is configured to transmit downlink control information in the downlink control channel, so that the terminal detects the downlink control information in the downlink control channel; Additionally, the terminal is configured to receive a scheduling request in the uplink control channel, transmit downlink control information in the downlink control channel, and detect the downlink control information in the downlink control channel.

The transmitting unit 1903 is configured to transmit the configuration index of the guard band and guard time, so that the terminal provides protection according to this configuration index when performing data communication.

The present disclosure provides a frame structure based on a new duplex mode. By adopting a frame structure based on the new duplex mode provided by the present disclosure, the advantages of traditional time division duplex and frequency division duplex can be obtained simultaneously, and scheduling flexibility is greatly increased. Specifically, since the control channel is always present, the HARQ process will be greatly simplified and scheduling delays will be reduced. Additionally, because paired spectrum is not required, the method provided by this disclosure improves the utilization ratio of spectrum for frequency division duplex.

The solution provided by this disclosure is also more suitable for the implementation of a large-scale MIMO system because downlink channel state information can be obtained by time-divided data transmission band portion in the time domain.

In conclusion, the scheme provided by the present disclosure provides more sufficient frequency spectrum utilization than traditional frequency division duplex and time division duplex, while combining the advantages of both types of duplex modes.

Hereinafter, embodiments of the present disclosure will be described in detail, examples of which are shown in the accompanying drawings, where identical or similar reference numerals represent identical or similar elements or elements having identical or similar functions. Embodiments described below with reference to the drawings are merely examples for explaining the present disclosure and should not be construed as limiting the present disclosure.

Those skilled in the art will understand that as used herein, the singular forms “a,” “an,” and “the” may also include plural forms unless specifically stated otherwise. As used in the description of this disclosure, the word "comprising" refers to the presence of a feature, integer, step, operation, element, and/or component, but may also include one or more other features, integers, steps, operations, elements, components, and/or It should be understood that the presence or addition of combinations thereof is not excluded. It should be understood that when an element is referred to as being “connected” or “coupled” to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. Additionally, “connection” or “coupling” as used herein may include wireless connection or wireless coupling. As used herein, the phrase “and/or” includes any or all of one or more associated listed items, and any combinations thereof.

Unless otherwise defined, a person skilled in the art will understand that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. there is. Additionally, terms as defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and it should be understood that they will not be described in an idealized or overly formal sense unless specifically defined herein. .

As used herein, “terminal” and “terminal device” refer to a wireless signal receiver device, which is a device having only a wireless signal receiver without transmission capabilities, as well as a device having receiving and transmitting hardware capable of performing two-way communication through a two-way communication link. A person skilled in the art will understand that the present invention includes a device with receiving and transmitting hardware. These devices may include cellular or other communication devices with a single line display, a multi-line display, or a cellular or other communication device without a multi-line display; Personal Communications Service (PCS), which may combine voice, data processing, fax and/or data communications functions; Personal Digital Assistants (PDAs), which may include radio frequency (RF) receivers, pagers, Internet/intranet access, web browsers, nodepads, calendars, and/or Global Positioning System (GPS) receivers; It may include a conventional laptop and/or palmtop computer or other device, which may be a conventional laptop and/or palmtop computer or other device having and/or including an RF receiver. As used herein, “terminal”, “terminal device” may be portable, transportable, vehicle (air, marine and/or land) mounted, or may be adapted and/or configured to operate locally and/or It can operate in a distributed form on Earth and/or elsewhere in space. As used herein, “terminal” and “terminal device” also include a communication terminal, an Internet terminal, a music/video playback terminal, such as a PDA, a mobile Internet device (MID), and/or a mobile phone with a music/video playback function, or This can include smart TVs, set-top boxes, and other devices. Additionally, “terminal” and “terminal device” may be replaced with “user” and “UE”.

FIG. 20 illustrates an example wireless communication system 2004 to which example embodiments of the present disclosure are applied. In Figure 20, the UE detects indication information. Wireless communication system 2000 includes one or more fixed infrastructure base units that form a distributed network over a geographic area. Base unit is also referred to as access point (AP), access terminal (AT), base station (BS), Node-B and evolved Node B (eNB), next-generation BS (gNB), or other terms used in the art. It could be. In embodiments of the present disclosure, access point may be replaced with any of the above terms. As shown in Figure 20, one or more base stations 2001 and 2002 provide services for several mobile stations (MS) or UEs or terminal devices or terminals 2003 and 2004 in a service area. For example, a service area may be a cell or section of a cell. In some systems, one or more BSs may be communicatively coupled to a controller forming an access network, and the controller may be communicatively coupled to one or more core networks. Examples of this disclosure are not limited to any particular wireless communication system.

In the time and/or frequency domain, base stations 2001 and 2002 transmit downlink (DL) communication signals 2012 and 2013 to UEs 2003 and 2004, respectively. UEs 2003 and 2004 communicate with one or more base units 2001 and 2002 via uplink (UL) communication signals 2011 and 2014, respectively. In one embodiment, the mobile communication system 2000 is an Orthogonal Frequency Division Multiplexing (OFDM)/Orthogonal Frequency Division Multiple Access (OFDMA) system including a plurality of base stations and a plurality of UEs. The plurality of base stations include base station 2001 and base station 2002, and the plurality of UEs include UE 2003 and UE 2004. The base station 2001 communicates with the UE 2003 through a UL communication signal 2011 and a DL communication signal 2012. When the base station has DL packets to be transmitted to UEs, each UE can get a DL allocation (resource), such as a set of radio resources in a Physical Downlink Shared Channel (PDSCH) or a Narrowband Downlink Shared Channel (NPDSCH). When the terminal needs to transmit a packet from the UL to the base station, the UE obtains from the base station the authority to allocate a Physical Uplink Shared Channel (PUSCH) or Narrowband Uplink Shared Channel (NPUSCH) containing a UL radio resource set. The UE obtains DL or UL scheduling information from a Physical Downlink Control Channel (PDCCH), or MPDCCH, or EPDCCH, or NPDCCH, dedicated to the UE. DL or UL scheduling information and other control information carried through the DL control channel are referred to as Downlink Control Information (DCI). Figure 20 also shows the different physical channels in DL (2012) and UL (2011). DL (2012) is PDCCH or EPDCCH or NPDCCH or MPDCCH (2021), PDSCH or NPDSCH (2022), PCFICH (Physical Control Formation Indicator Channel) (2023), PMCH (Physical Multicast Channel) (2024), PBCH (Physical Broadcast Channel) ) or Narrowband Physical Broadcast Channel (NPBCH) (2025), and Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), or Narrowband Primary Synchronization Signal (NPSS)/Secondary Synchronization Signal (NSSS) 12x. The DL control channel 2021 transmits a DL control signal to the terminal. DCI (2020) is carried over the DL control channel (2021). PDSCH (2022) transmits data information to the UE. The PCFICH (2023) transmits information for decoding the PDCCH, for example, information dynamically indicating the number of symbols used by the PDCCH (2021). PMCH (2024) carries broadcast/multicast information. PBCH or NPBCH (2025) carries a Master Information Block (MIB) for early UE discovery and cell-wide coverage. PHICH carries HARQ (Hybrid Automatic Repeat reQuest) information indicating whether the base station correctly received the UL transmission signal. The UL (2011) includes a Physical Uplink Control Channel (PUCCH) (2031), a PUSCH (2032), and a Physical Random Access Channel (PRACH) (2033) that carries random access information.

In one embodiment, wireless communications network 2000 uses OFDMA or multi-carrier architectures, including next-generation single-carrier FDMA architectures or multi-carrier OFDMA architectures for UL transmission and adaptive modulation and coding (AMC) on the DL. FDMA-based single carrier architectures include Interleaved Frequency Division Multiple Access (IFDMA), Localized FDMA (LFDMA), Discrete Fourier Transform-Spread Orthogonal Frequency Division Multiplexing (DFT-SOFDM) of IFDMA or LFDMA, and also various enhanced NOMA of OFDMA systems. (Non-Orthogonal Multiple Access) architectures, such as Pattern Division Multiple Access (PDMA), Sparse Code Multiple Access (SCMA), Multi-User Shared Access (MUSA), Low Code Rate Spreading Frequency Domain Spreading (LCRS FDS), Non-Orthogonal Coded Multiple Access (NCMA), Resource Spreading Multiple Access (RSMA), Interleave-Grid Multiple Access (IGMA), Low Density Spreading with Signature Vector Extension (LDS-SVE), Low code rate and Signature based Shared Access (LSSA) ), Non-Orthogonal Coded Access (NOCA), Interleave Division Multiple Access (IDMA), Repetition Division Multiple Access (RDMA), Group Orthogonal Coded Access (GOCA), and Welch-bound equality based Spread MA (WSMA).

In an OFDMA system, a remote unit is typically provided by allocating DL or UL radio resources containing a set of subcarriers for one or more OFDM symbols. Exemplary OFDMA protocols include the LTE and IEEE 802.16 standards developed from the 3GPP UMTS standards. Additionally, the architecture supports transmission technologies such as Multi-Carrier CDMA (MC-CDMA), Multi-Carrier Direct Sequence CDMA (MC-DS-CDMA), and Orthogonal Frequency and Code Division Multiplexing (OFCDM) in one-dimensional or two-dimensional transmission. It may involve the use of simpler time and/or frequency division multiplexing/multiple access techniques, or it may be based on a combination of these different techniques. In alternative embodiments, the communication system may use other cellular communication system protocols, including but not limited to TDMA or direct sequence CDMA.

The random access preamble format in future wireless communication systems can be expressed as Table 5 below. For preamble formats of numbers A1, A2, A3, B1, B2, B3, B4, C0, C2, the value of μ can be 0, 1, 2, 3, =T _s /(1/30720) is the ratio of the actual sampling interval to the reference sampling interval (where T s is the actual sampling interval (ms)).

Table 5 Random access preamble format

Random access preamble formats are predefined for future wireless communication systems. In the formats defined above, the actually used random access preamble formats (or combinations thereof) include a total of 14 formats: 0, 1, 2, 3, A1, A2, A3, B1, B4, A1/ B1, A2/B2, A3/B3, C0 and C2. Among these formats, format A1/B1 represents a combination of several A1 and several B1 in a specific order as a format for use, and format A2/B2 represents a combination of several A2 and several B2 in a specific order as a format for use. The format A3/B3 is a format for use and represents a combination of several A3s and several B3s in a specific order. It should be noted that formats A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0, and C2 each have subformats with different subcarrier spacing sizes. Specifically, when the values of μ are different (μ=0, 1, 2, 3), A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0 and C2 are additionally 4. It has different subformats. In this case, 0, 1, 2, 3, A1 (15/30/60/120 kHz), A2 (15/30/60/120 kHz), A3 (15/30/60/120 kHz), B1 (15 /30/60/120 kHz), B4 (15/30/60/120 kHz), A1/B1 (15/30/60/120 kHz), A2/B2 (15/30/60/120 kHz, A3/ There are a total of 44 random access preamble formats: B3 (15/30/60/120 kHz), C0 (15/30/60/120 kHz), and C2 (15/30/60/120 kHz), where 15/30/60/120 kHz indicates a random access preamble subcarrier spacing of 15 kHz or 30 kHz or 60 kHz or 120 kHz, respectively.

Hereinafter, a flowchart of a method for determining random access preamble transmission power performed in a base station according to an exemplary embodiment of the present disclosure will be described in detail with reference to FIG. 21.

FIG. 21 schematically illustrates a flowchart of a method 200 for determining random access preamble transmission power performed in a base station according to an exemplary embodiment of the present disclosure. As shown in FIG. 21 , method 200 may include steps 2101 and 202.

At step 2101, the base station may generate random access configuration information. The random access configuration information includes a random access configuration index and random access preamble subcarrier interval indication information.

The length of random access configuration information is 9 bits, of which 8 bits are prach-ConfigIndex numbered from 0 to 255, which represents most of the random access configuration information including the random access preamble format (denoted as prach-ConfigIndex) It should be noted that the preamble format indicated by prach-ConfigIndex may include subcarrier spacing information of the preamble or may not include subcarrier spacing information of the preamble. The preamble format indicated by prach-ConfigIndex is A1, A2, A3, B1, B4. , A1/B1, A2/B2, A3/B3, C0 or C2, the preamble format does not include subcarrier interval information, and the preamble format indicated by prach-ConfigIndex is 0, 1, 2 or 3. , the preamble format includes subcarrier interval information); 1 bit is prach-Msg1SubcarrierSpacing, which indicates random access preamble subcarrier spacing information when the preamble format is A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0 or C2.

At step 2102, the base station may transmit random access configuration information to the UE.

In an example embodiment, the random access configuration information is included in a broadcast message transmitted to the UE over a Physical Broadcast Channel (PBCH) or a New Radio-Physical Broadcast Channel (NR-PBCH). The broadcast message includes the system's carrier range information (above 6 GHz or below 6 GHz) and RMSI (Remaining System Information) indication information. Specifically, random access configuration information is included in RMSI indication information.

In one embodiment, the UE may detect a broadcast message, obtain carrier range information and RMSI indication information from the broadcast message, and determine whether the carrier range of the system is above 6 GHz or below 6 GHz. The UE may also read the RMSI based on the obtained RMSI indication information to obtain random access configuration information.

The UE may use the random access preamble subcarrier spacing indication information prach-Msg1SubcarrierSpacing in the obtained random access configuration information to determine the random access preamble transmit power offset DELTA_PREAMBLE corresponding to the obtained random access preamble format, as described in detail below. The random access preamble format can be obtained based on the random access configuration index prach-ConfigIndex.

Hereinafter, the structure of a base station according to an exemplary embodiment of the present disclosure will be described with reference to FIG. 22. FIG. 22 schematically shows a structural block diagram of a base station 2200 according to an exemplary embodiment of the present disclosure. Base station 2200 may be used to perform method 200 described with reference to FIG. 21. For the sake of brevity, only the schematic structure of a base station according to an exemplary embodiment of the present disclosure will be described herein, and details described in method 200 with reference to FIG. 21 will be omitted.

As shown in Figure 22, the base station 2200 includes a communication interface 2201 for external communication, a processing unit or processor 2203, which may be a single unit or a combination of multiple units to perform the different steps of the method. ; When executed by the processor 2203, cause the processor 2203 to generate random access configuration information (this random access configuration information includes a random access configuration index and random access preamble subcarrier interval indication information) and also cause the processor 2203 to generate random access configuration information. and a memory 2205 that stores computer-executable instructions that allow information to be transmitted to the UE.

As described above, the random access configuration index and random access preamble subcarrier interval indication information may be used by the UE to obtain the random access preamble format.

Hereinafter, a flowchart of a method for determining a random access preamble sequence transmission power performed in a UE according to an exemplary embodiment of the present disclosure will be described with reference to FIG. 23.

FIG. 23 schematically illustrates a flowchart of a method 2300 for determining random access preamble transmission power performed in a UE according to an exemplary embodiment of the present disclosure. As shown in FIG. 23 , method 2300 may include steps 2301, 2302, and 2303.

In step 2301, the UE may obtain random access configuration information from the base station. The random access configuration information includes a random access configuration index and random access preamble sequence subcarrier interval indication information.

The length of random access configuration information is 9 bits, of which 8 bits are prach-ConfigIndex numbered from 0 to 255, which represents most of the random access configuration information including the random access preamble format (denoted as prach-ConfigIndex) It should be noted that the preamble format indicated by prach-ConfigIndex may include subcarrier spacing information of the preamble or may not include subcarrier spacing information of the preamble. The preamble format indicated by prach-ConfigIndex is A1, A2, A3, B1, B4. , A1/B1, A2/B2, A3/B3, C0 or C2, the preamble format does not include subcarrier interval information, and the preamble format indicated by prach-ConfigIndex is 0, 1, 2 or 3. , the preamble format includes subcarrier interval information); 1 bit is prach-Msg1SubcarrierSpacing, which indicates random access preamble subcarrier spacing information when the preamble format is A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0 or C2.

In an example embodiment, the UE receives a broadcast message transmitted on a physical broadcast channel (PBCH or NR-PBCH) from a base station. The broadcast message includes the system's carrier range information (above 6 GHz or below 6 GHz) and RMSI indication information. Specifically, random access configuration information is included in RMSI indication information.

In one embodiment, the UE may detect a broadcast message, obtain carrier range information and RMSI indication information from the broadcast message, and determine whether the carrier range of the system is above 6 GHz or below 6 GHz. The UE may also read the RMSI based on the obtained RMSI indication information to obtain random access configuration information.

In step 2302, the UE may obtain a random access preamble format based on the random access configuration index and random access preamble subcarrier interval indication information.

As described above, random access preamble formats are predefined for future wireless communication systems. In the formats defined above, the actually used random access preamble formats (or combinations thereof) include a total of 14 formats: 0, 1, 2, 3, A1, A2, A3, B1, B4, A1/ B1, A2/B2, A3/B3, C0 and C2. Among these formats, format A1/B1 represents a combination of several A1 and several B1 in a specific order as a format for use, and format A2/B2 represents a combination of several A2 and several B2 in a specific order as a format for use. The format A3/B3 is a format for use and represents a combination of several A3s and several B3s in a specific order. It should be noted that formats A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0, and C2 each have subformats with different subcarrier spacing sizes. Specifically, when the values of μ are different (μ=0, 1, 2, 3), A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0 and C2 are additionally 4. It has different subformats. In this case, 0, 1, 2, 3, A1 (15/30/60/120 kHz), A2 (15/30/60/120 kHz), A3 (15/30/60/120 kHz), B1 (15 /30/60/120 kHz), B4 (15/30/60/120 kHz), A1/B1 (15/30/60/120 kHz), A2/B2 (15/30/60/120 kHz, A3/ There are a total of 44 random access preamble formats: B3 (15/30/60/120 kHz), C0 (15/30/60/120 kHz), and C2 (15/30/60/120 kHz), where 15/30/60/120 kHz indicates a random access preamble subcarrier spacing of 15 kHz or 30 kHz or 60 kHz or 120 kHz, respectively.

The UE may locally store a predefined correspondence between random access preamble formats and random access preamble transmission power offsets DELTA_PREAMBLE. Alternatively, the UE may store a predefined correspondence between random access preamble formats, random access preamble subcarrier interval indication information, carrier ranges and random access preamble transmit power offsets DELTA_PREAMBLE.

In step 2303, the UE may determine the random access preamble transmission power offset DELTA_PREAMBLE corresponding to the acquired random access preamble format.

In an exemplary embodiment, the UE determines the random access preamble transmit power offset DELTA_PREAMBLE corresponding to the obtained random access preamble format by querying a correspondence table containing at least the random access preamble format and the random access preamble transmit power offsets DELTA_PREAMBLE. You can.

In another exemplary embodiment, the correspondence table may further include at least one of random access preamble subcarrier interval indication information and carrier range. In this case, the random access preamble transmission power offset corresponding to at least one of the obtained random access preamble format, random access preamble subcarrier interval indication information, and carrier range may be determined by querying the correspondence table.

The random access preamble format is independent of the random access preamble subcarrier spacing, such as 0, 1, 2, 3, A1, A2, A3, B1, B4, A1/B1, A2/B2, A3/B3, C0, and C2. Refers to arbitrary formats or 0, 1, 2, 3, A1 (15/30/60/120 kHz), A2 (15/30/60/120 kHz), A3 (15/30/60/120 kHz), B1 (15/30/60/120 kHz), B4 (15/30/60/120 kHz), A1/B1 (15/30/60/120 kHz), A2/B2 (15/30/60) /120 kHz), A3/B3 (15/30/60/120 kHz), C0 (15/30/60/120 kHz), and C2 (15/30/60/120 kHz). Note that it may refer to arbitrary formats that depend on spacing.

Possible correspondence between random access preamble formats and random access preamble transmission power offsets DELTA_PREAMBLE can be provided as in Table 6. As described above, in the following description, DELTA_PREAMBLE represents the random access preamble transmission power offset, Msg1SCS represents the random access preamble sequence subcarrier interval indication information, 0, 1, 2, 3, A1, A2, A3, B1 , B4, A1/B1, A2/B2, A3/B3, C0 and C2 represent the defined random access preamble formats, and 15kHz, 30kHz, 60kHz and 120kHz are the random access preamble subcarrier spacing.

Table 6 Correspondence table of random access preamble format and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats and random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 7.

Table 7 Correspondence table of random access preamble format and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats and random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 8.

Table 8 Correspondence table of random access preamble format and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats and random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 9.

Table 9 Correspondence table of random access preamble format and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats and random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 10.

Table 10 Correspondence table of random access preamble format and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats and random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 11.

Table 11 Correspondence table of random access preamble format and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats and random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 12.

Table 12 Correspondence table of random access preamble format and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats and random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 13.

Table 13 Correspondence table of random access preamble format and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information and random access preamble transmit power offsets DELTA_PREAMBLE may be provided as in Table 14.

Table 14 Correspondence table of random access preamble format, random access preamble subcarrier spacing indication information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

Note that the possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE can be provided by exchanging some of the columns of Table 14 as shown in Table 15. Should be.

Table 15 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE are shown in Tables 16 and 17, where Tables 16-1 and 16-2 are the values of Table 16. Table 17-1 and Table 17-2 are sub-tables of Table 17), provided by dividing each Table 14 and Table 15 into two sub-tables based on carrier ranges. Please note that this can happen.

Table 16-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 16-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 17-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 17-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information, and random access preamble transmit power offsets DELTA_PREAMBLE may be provided as in Table 18.

Table 18 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Note that the possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE can be provided by exchanging some columns of Table 18, as shown in Table 19. Should be.

Table 19 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmission power offsets DELTA_PREAMBLE are shown in Tables 17 and 18 (where Tables 20-1 and 20-2 are shown in Table 20). Table 21-1 and Table 21-2 are sub-tables of Table 21), provided by dividing each Table 18 and Table 19 into two sub-tables based on carrier ranges. Please note that this can happen.

Table 20-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 20-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 21-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 21-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Other possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information and random access preamble transmit power offsets DELTA_PREAMBLE may be provided as in Table 22.

Table 22 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

A possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE can be provided by exchanging some of the columns of Table 22, as shown in Table 23. Be careful.

Table 23 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE are shown in Tables 24 and 25 (where Tables 24-1 and 24-2 are shown in Table 24). Table 25-1 and Table 25-2 are sub-tables of Table 25), provided by dividing each Table 22 and Table 23 into two sub-tables based on carrier ranges. Please note that this can happen.

Table 24-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 24-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 25-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 25-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information, and random access preamble transmit power offsets DELTA_PREAMBLE may be provided as in Table 26.

Table 26 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

A possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE can be provided by exchanging some of the columns of Table 26, as shown in Table 27. Be careful.

Table 27 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE are shown in Tables 28 and 29, where Tables 28-1 and 28-2 are the values of Table 28. Table 29-1 and Table 29-2 are sub-tables of Table 29), provided by dividing each Table 26 and Table 27 into two sub-tables based on carrier ranges. Please note that this can happen.

Table 28-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 28-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 29-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 29-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Other possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information and random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 30.

Table 30 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

A possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE can be provided by exchanging some of the columns of Table 30, as shown in Table 31. Be careful.

Table 31 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE are shown in Table 32 and Table 33, where Table 32-1 and Table 32-2 are the values of Table 32. As shown in (Table 33-1 and Table 33-2 are sub-tables of Table 33), each Table 30 and Table 31 are divided into two sub-tables based on carrier ranges. Please note that this can happen.

Table 32-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 32-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 33-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 33-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Other possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information and random access preamble transmit power offsets DELTA_PREAMBLE may be provided as in Table 34.

Table 34 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

A possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE can be provided by exchanging some of the columns of Table 34, as shown in Table 35. Be careful.

Table 35 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE are shown in Table 36 and Table 37, where Table 36-1 and Table 36-2 are the values of Table 36. As shown in (Table 37-1 and Table 37-2 are sub-tables of Table 37), each Table 34 and Table 35 are divided into two sub-tables based on carrier ranges. Please note that this can happen.

Table 36-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 36-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 37-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 37-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information, and random access preamble transmit power offsets DELTA_PREAMBLE may be provided as in Table 38.

Table 38 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

A possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE can be provided by exchanging some of the columns of Table 38, as shown in Table 39. Be careful.

Table 39 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information and preamble transmit power offsets DELTA_PREAMBLE are Table 40 and Table 41 (where Table 40-1 and Table 40-2 are sub-subjects of Table 40). table, and Table 41-1 and Table 41-2 are sub-tables of Table 41), which can be provided by dividing each Table 38 and Table 39 into two sub-tables based on carrier ranges. It should be noted that this may be possible.

Table 40-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 40-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 41-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 41-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Other possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information and random access preamble transmit power offsets DELTA_PREAMBLE may be provided as in Table 42.

Table 42 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

A possible correspondence between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE can be provided by exchanging some of the columns of Table 42, as shown in Table 43. Be careful.

Table 43 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Possible correspondences between random access preamble formats, random access preamble subcarrier interval indication information, and preamble transmit power offsets DELTA_PREAMBLE are shown in Tables 44 and 45, where Tables 44-1 and 44-2 are the values of Table 44. Table 45-1 and Table 45-2 are sub-tables of Table 45) by dividing each Table 42 and Table 43 into two sub-tables based on carrier ranges. Please note that this can happen.

Table 44-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 44-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 45-1 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Table 45-2 Correspondence table of random access preamble format, Msg1SCS and DELTA_PREAMBLE

Other possible correspondences between random access preamble formats and random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 46.

Table 46 Correspondence table of random access preamble format and DELTA_PREAMBLE

In Table 46, μ is a parameter indicating the random access preamble subcarrier interval (the displayed value is 15·2 ^μ kHz) and can be 0, 1, 2, or 3. The random access preamble subcarrier spacing is 15 kHz when μ=0; The random access preamble subcarrier spacing is 30 kHz when μ=1; The random access preamble subcarrier spacing is 60 kHz when μ=2; The random access preamble subcarrier spacing is 120 kHz when μ=3.

The possible correspondence between random access preamble formats and preamble transmission power offsets DELTA_PREAMBLE is as shown in Table 47 (where Table 47-1 and Table 47-2 are sub-tables of Table 47). It should be noted that Table 46 can be provided by dividing into two sub-tables based on .

Table 47-1 Correspondence table of random access preamble format and DELTA_PREAMBLE

Table 47-2 Correspondence table of random access preamble format and DELTA_PREAMBLE

In Table 47, μ is a parameter indicating the random access preamble subcarrier interval (the displayed value is 15·2 ^μ kHz) and can be 0, 1, 2, or 3. The random access preamble subcarrier spacing is 15 kHz when μ=0; The random access preamble subcarrier spacing is 30 kHz when μ=1; The random access preamble subcarrier spacing is 60 kHz when μ=2; The random access preamble subcarrier spacing is 120 kHz when μ=3.

Other possible correspondences between random access preamble formats and random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 48.

Table 48 Correspondence table of random access preamble format and DELTA_PREAMBLE

In Table 48, μ is a parameter representing the random access preamble subcarrier interval (the displayed value is 15·2 ^μ kHz) and can be 0, 1, 2, or 3. The random access preamble subcarrier spacing is 15 kHz when μ=0; The random access preamble subcarrier spacing is 30 kHz when μ=1; The random access preamble subcarrier spacing is 60 kHz when μ=2; The random access preamble subcarrier spacing is 120 kHz when μ=3.

The possible correspondence between random access preamble formats and preamble transmit power offsets DELTA_PREAMBLE is as shown in Table 49 (where Table 49-1 and Table 49-2 are sub-tables of Table 49): It should be noted that Table 48 can be provided by dividing Table 48 into two sub-tables based on .

Table 49-1 Correspondence table of random access preamble format and DELTA_PREAMBLE

Table 49-2 Correspondence table of random access preamble format and DELTA_PREAMBLE

In Table 49, μ is a parameter representing the random access preamble subcarrier interval (the displayed value is 15·2 ^μ kHz) and can be 0, 1, 2, or 3. The random access preamble subcarrier spacing is 15 kHz when μ=0; The random access preamble subcarrier spacing is 30 kHz when μ=1; The random access preamble subcarrier spacing is 60 kHz when μ=2; The random access preamble subcarrier spacing is 120 kHz when μ=3.

After the UE determines the random access preamble transmit power offset DELTA_PREAMBLE as described above, the random access preamble transmit power PREAMBLE_RECEIVED_TARGET_POWER expected to be received by the base station may be set as follows:

Here, ra-PreambleInitialReceivedTargetPower is the initial transmission power configured by the upper layer, DELTA_PREAMBLE is the random access preamble transmit power offset, PREMBLE_POWER_RAMPING_COUNTER is the power ramping count, and powerRampingStep is the power ramping step configured by the upper layer.

Afterwards, the UE determines that the final random access preamble transmission power is min{ , PREAMBLE_RECEIVED_TARGET_POWER+ }, where is the maximum transmit power of the UE, is the path loss value.

Hereinafter, the structure of the UE according to an exemplary embodiment of the present disclosure will be described with reference to FIG. 24. FIG. 24 schematically shows a structural block diagram of a UE 2400 according to an exemplary embodiment of the present disclosure. UE 2400 may be used to perform method 400 described with reference to FIG. 23 . For brevity, only the schematic structure of the UE according to example embodiments of the present disclosure will be described here, and details described in method 2300 with reference to FIG. 23 will be omitted.

As shown in Figure 24, UE 2400 is equipped with a processing unit or processor 2403, a communication interface for external communication 2401, which may be a single unit or a combination of multiple units for performing different steps of the method. ; When executed by the processor 2403, cause the processor 2403 to obtain random access configuration information from the base station (this random access configuration information includes a random access configuration index and random access preamble subcarrier interval indication information), and cause the processor 2403 to obtain random access configuration information from the base station. Store computer-executable instructions for obtaining a random access preamble format based on the access configuration index and the random access preamble subcarrier interval indication information, and determining a random access preamble transmit power offset corresponding to the obtained random access preamble format. It includes a memory 2405 that does.

In an exemplary embodiment, the UE 2400 determines the random access preamble transmit power corresponding to the obtained random access preamble format by querying a correspondence table containing at least random access preamble formats and random access preamble transmit power offsets DELTA_PREAMBLE. Offset DELTA_PREAMBLE can be determined.

In another exemplary embodiment, the correspondence table may further include at least one of random access preamble subcarrier interval indication information and carrier range. In this case, the random access preamble transmission power offset DELTA_PREAMBLE corresponding to at least one of the obtained random access preamble format, random access preamble subcarrier interval indication information, and carrier range can be determined by querying the correspondence table.

As described above, the correspondence table is predefined and may be stored locally in the UE (2400).

The novel method of determining the random access preamble transmission power proposed in the embodiments of the present disclosure is applicable to all preamble formats in future wireless communication systems, and can efficiently adjust the preamble transmission power in the random access process. , It can also improve the success probability of random access of the terminal when controlling interference, significantly improve the performance of future wireless communication systems, and provide lower access delay and better access experience for the terminal. can do.

As various embodiments of the present disclosure, it may further include the following method or device.

performing a random access process with the terminal according to random access configuration information transmitted by the terminal through the anchor subband; and performing data communication with the terminal in the data transmission band.

Preferably, performing a random access process with the terminal according to the random access configuration information transmitted by the terminal on the anchor subband comprises carrying a random access preamble sequence, transmitted by the terminal on the uplink anchor subband. receiving random access configuration information; performing random access according to the random access preamble sequence and transmitting a random access response; detecting message 3 in the uplink anchor subband; and transmitting contention resolution in the downlink anchor subband.

Preferably, performing a random access process with the terminal according to the random access configuration information transmitted by the terminal on the anchor subband comprises carrying a random access preamble sequence, transmitted by the terminal on the uplink anchor subband. receiving random access configuration information; Performing random access according to the random access preamble sequence, transmitting control information of the uplink anchor subband used by the random access preamble sequence in the downlink control channel, and transmitting a random access response in the downlink data transmission band. ; Detecting message 3 in the uplink data transmission band; and transmitting contention resolution in the downlink data transmission band.

Preferably, the step of performing data communication with the terminal in the data transmission band is:

Transmitting downlink control information in the downlink control channel so that the terminal detects the downlink control information in the downlink control channel; and receiving a scheduling request on the uplink control channel and transmitting the downlink control information on the downlink control channel, so that the terminal detects downlink control information on the downlink control channel.

Preferably, the frame structure further includes a guard band and/or a guard time, and the method transmits the configuration index of the guard band and guard time, so as to provide protection according to the configuration index when the terminal performs data communication. It further includes steps.

In another embodiment, a communication device based on a frame structure is provided, the present disclosure comprising a frame structure including a control channel band, an anchor subband, and a data transmission band, the device comprising: detecting a synchronization signal block; , a downlink processing unit configured to perform downlink synchronization processing with the base station according to the detected synchronization signal block and determine time-frequency resources of the anchor subband; an uplink processing unit configured to obtain random access configuration information according to the time-frequency resources of the anchor subband, perform a random access process according to the random access configuration information, and complete uplink synchronization; and a communication unit configured to obtain control information in the control channel band and perform data communication with the base station in the data transmission band.

In another embodiment, a communication device based on a frame structure is provided, the present disclosure comprising a frame structure including an anchor subband and a data transmission band, the device comprising:

an uplink processing unit configured to perform a random access process with the terminal according to random access configuration information transmitted by the terminal through the anchor subband; and a communication unit configured to perform data communication with the terminal in the data transmission band.

In another embodiment, a frame structure applied to a communication method based on the frame structure is provided, wherein the frame structure includes three bands: a control channel band, an anchor subband, and a data transmission band; Here, downlink transmission contents carrying synchronization information blocks and/or uplink transmission contents carrying random access configuration information are included in the anchor subband; The control channel band is used to transmit an uplink control channel and/or a downlink control channel; Additionally, the data transmission band is used to transmit uplink data and/or downlink data.

Preferably, the frame structure further includes a guard band and/or guard time provided between the bands to separate adjacent bands to provide protection during data communication.

For future wireless communication systems, this disclosure proposes a new method for determining random access preamble transmission power. For each new random access preamble formats determined based on the new carrier range and subcarrier spacing size, new transmit power offsets are respectively designed. On this basis, corresponding signaling is designed according to the indication of different carrier ranges and subcarrier spacing sizes to indicate preamble transmission power offsets. Finally, the UE determines the final random access preamble transmit power based on the transmit power offset and other relevant parameters.

In one embodiment, a method for determining random access preamble transmission power is provided. The method includes obtaining random access configuration information including a random access configuration index and random access preamble subcarrier interval indication information from a base station; Obtaining a random access preamble format based on the random access configuration index and the random access preamble subcarrier interval indication information; and determining a random access preamble transmission power offset corresponding to the obtained random access preamble format.

In another embodiment, the operation of determining a random access preamble transmit power offset corresponding to an obtained random access preamble format comprises a correspondence table containing at least the random access preamble formats and the random access preamble transmit power offsets. and determining, by querying, a random access preamble transmit power offset corresponding to the obtained random access preamble format.

In another embodiment, the correspondence table further includes at least one of random access preamble subcarrier interval indication information and carrier range. The operation of determining a random access preamble transmission power offset corresponding to the obtained random access preamble format includes querying a correspondence table to determine at least one of the obtained random access preamble format and random access preamble subcarrier interval indication information and the carrier range. and determining a corresponding random access preamble transmit power offset.

In another embodiment, the correspondence table is predefined and stored locally in the UE.

In another embodiment, the correspondence table includes one of the following correspondence tables:

Here, DELTA_PREAMBLE represents the random access preamble transmission power offset, Msg1SCS represents the random access preamble subcarrier interval indication information, 0, 1, 2, 3, A1, A2, A3, B1, B4, A1/B1, A2/B2 , A3/B3, C0, C2 represent the defined random access preamble formats, 15 kHz, 30 kHz, 60 kHz, 120 kHz represent the random access preamble subcarrier interval, and μ is a parameter representing the random access preamble subcarrier interval. , where the random access preamble subcarrier spacing is 15 kHz when μ=0; The random access preamble subcarrier spacing is 30 kHz when μ=1; The random access preamble subcarrier spacing is 60 kHz when μ=2; The random access preamble subcarrier spacing is 120 kHz when μ=3.

In another embodiment, a method for determining random access preamble transmit power is provided. The method includes generating random access configuration information including a random access configuration index and random access preamble subcarrier interval indication information; and transmitting random access configuration information to the UE.

In another embodiment, the random access configuration index and random access preamble subcarrier interval indication information are used by the UE to obtain a random access preamble format and determine a random access preamble transmission power offset corresponding to the obtained random access preamble format. is used by.

In another embodiment, a UE is provided. The UE includes a communication interface configured for communication; processor; and when executed by a processor, cause the processor to obtain random access configuration information including a random access configuration index and random access preamble subcarrier interval indication information from the base station, and to include the random access configuration index and the random access preamble subcarrier interval indication information. and a memory storing computer-executable instructions for obtaining a random access preamble format based on the random access preamble format and determining a random access preamble transmit power offset corresponding to the obtained random access preamble format.

In another embodiment, the operation of determining a random access preamble transmit power offset corresponding to an obtained random access preamble format includes querying correspondence tables containing at least random access preamble formats and random access preamble transmit power offsets, and determining a random access preamble transmission power offset corresponding to the obtained random access preamble format.

In another embodiment, the correspondence table further includes at least one of random access preamble subcarrier interval indication information and carrier range. The operation of determining a random access preamble transmission power offset corresponding to the obtained random access preamble format includes querying a correspondence table to determine at least one of the obtained random access preamble format and random access preamble subcarrier interval indication information and the carrier range. and determining a corresponding random access preamble transmit power offset.

In another embodiment, the correspondence table is predefined and stored locally in the UE.

In another embodiment, a base station is provided. The base station includes a communication interface configured for communication; processor; and computer-executable instructions that, when executed by a processor, cause the processor to generate random access configuration information including a random access configuration index and random access preamble subcarrier interval indication information and transmit the random access configuration information to the UE. Includes storage memory.

In another embodiment, the random access configuration index and random access preamble subcarrier interval indication information are used by the UE to obtain a random access preamble format and determine a random access preamble transmission power offset corresponding to the obtained random access preamble format. is used by.

In another embodiment, a computer-readable medium is provided. The computer-readable medium stores instructions that, when executed by a processor, cause the processor to perform the method described above.

Computer-executable instructions or programs for implementing the functions of various embodiments of the present disclosure may be recorded on a computer-readable storage medium. Corresponding functions can be realized by the computer system reading programs recorded on the recording medium and executing these programs. A so-called “computer system” herein may be a computer system embedded in a device and may include an operating system or hardware (eg, peripheral devices). A “computer-readable storage medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a short-time dynamic storage program recording medium, or any other recording medium that is readable by a computer.

Various features or functional modules of the devices used in the above-described embodiments may be implemented or performed by circuitry (eg, a single chip or multi-chip integrated circuit). Circuits designed to perform the functions described herein may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, and individual It may include hardware components, or any combination thereof. A general-purpose processor can be a microprocessor or traditional processor, controller, microcontroller, or state machine. The circuit may be a digital circuit or an analog circuit. In the case of new integrated circuit technologies replacing existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present disclosure may also be implemented using these new integrated circuit technologies.

Those skilled in the art will understand that the present invention includes devices associated with performing one or more of the operations described in this disclosure. These devices may be specially designed and manufactured for the required purpose, or may include devices known to general purpose computers. These devices store computer programs that are selectively activated or reconfigured. These computer programs may be stored on a device (e.g., a computer) readable medium, or may be stored on floppy disks, hard disks, optical disks, CD-ROMs and magneto-optical disks, read-only memory (ROM), random access memory (RAM), etc. Electronic instructions, including, but not limited to, any type of disk, including memory), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), flash memory, magnetic cards, or light cards. It can be stored on any type of media suitable for storing data and coupled to a bus. That is, readable media includes any medium that stores or transmits information in a form readable by a device (eg, computer).

A person skilled in the art can understand that each block of these structure diagrams and/or block diagrams and/or flow diagrams, and combinations of blocks of these structure diagrams and/or block diagrams and/or flow diagrams, may be implemented by computer program instructions. . Those skilled in the art will recognize that these computer program instructions can be provided to a processor of a general-purpose computer, a specialized computer, or a processor for another programmable data processing method, and are designated accordingly in one or more blocks of the structure diagram and/or block diagram and/or flow diagram. It will be appreciated that the schemes may be executed by a computer or a processor of a computer for other programmable data processing methods.

Those skilled in the art will understand that various operations, methods, steps, measurements and schemes discussed in this disclosure may be substituted, modified, combined or deleted. Additionally, other steps, measurements, and schemes in the various operations, methods, and processes discussed in this disclosure may also be substituted, altered, rearranged, disassembled, combined, or deleted. Additionally, various operations, methods, steps, measurements and schemes of the prior art and those disclosed in the present invention may also be replaced, altered, rearranged, disassembled, combined or deleted.

The foregoing description is merely a portion of embodiments of the present disclosure. It should be noted that many improvements and modifications may be made to those skilled in the art without departing from the principles of the present disclosure. Such improvements and modifications also fall within the protection scope of the present disclosure.

A person skilled in the art can understand that each block of the structure diagram and/or block diagram and/or flow diagram, and a combination of blocks in the structure diagram and/or block diagram and/or flow diagram, may be implemented by computer program instructions. Those skilled in the art will understand that computer program instructions may be provided to a general-purpose computer, special-purpose computer, or other processor capable of programming data processing methods for implementation, and thus may be included in one or more blocks of a schematic diagram and/or block diagram and/or flow diagram. It will be understood that the specified methods may be implemented by a computer or other processor capable of programming data processing methods.

Here, each module of the device of the present disclosure may be integrated into one body or individually. The modules can be combined into one module or further divided into multiple sub-modules.

Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of preferred embodiments and that the modules or processes in the accompanying drawings are not necessarily necessary to implement the present disclosure.

Those skilled in the art will understand that modules of the device in the embodiments may be distributed in the device of the embodiments as described in the embodiments, and corresponding changes may be made in one or more devices different from the present embodiment. The modules in the above-described embodiments may be combined into one module, or may be further divided into multiple sub-modules.

The above serial numbers in this disclosure are for illustrative purposes only and do not indicate advantages and disadvantages of the embodiments.

The foregoing contents are only specific embodiments of the present disclosure, and the present disclosure is not limited thereto, and any changes that a person skilled in the art may think of should be included in the protection scope of the present disclosure.

Methods according to embodiments mentioned in the claims and/or detailed description of the present disclosure may be implemented in hardware, software, or a combination of hardware and software.

When the methods are implemented by software, a computer-readable storage medium may be provided for storing one or more programs (software modules). One or more programs stored in a computer-readable storage medium may be configured to be executed by one or more processors in an electronic device. At least one program may include instructions that cause the electronic device to perform methods according to various embodiments of the present invention as defined by the appended claims and/or disclosed herein.

Programs (software modules or software) may include random access memory and flash memory, read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disk storage, compact disc-ROM (CD-ROM), and DVD. It may be stored in non-volatile memories, including a digital versatile disc or other types of optical storage devices or magnetic cassettes. Alternatively, any combination of some or all may form the memory in which the program is stored. Additionally, a plurality of such memories may be included in an electronic device.

Additionally, programs may be stored on an attached storage device accessible through a communications network, such as the Internet, an intranet, a local area network (LAN), a wide area network (WAN), and a storage area network (SAN), or a combination thereof. These storage devices can be accessed by electronic devices through external ports. Additionally, a separate storage device on a communications network may access the portable electronic device.

In the above-described specific embodiments of the present disclosure, elements included in the present disclosure are expressed in singular or plural numbers depending on the specific embodiment presented. However, the singular or plural forms are selected for convenience of description appropriate to the presented situation, and the various embodiments of the present disclosure are not limited to a single element or multiple elements. Additionally, multiple elements expressed in this specification may be composed of one element, and a single element of this specification may be composed of multiple elements.

Although the present disclosure has been shown and described with reference to specific embodiments, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of the disclosure. Accordingly, the scope of the present disclosure should not be limited to the embodiments but should be defined by the appended claims and their equivalents.

Although the present disclosure has been described as an exemplary embodiment, various changes and modifications may occur to those skilled in the art. This disclosure is intended to cover such changes and modifications as fall within the scope of the appended claims.

Claims (20)

In a method performed by a user equipment (UE) in a wireless communication system,
A process of receiving, from a base station, random access configuration information including information about a physical random access channel (PRACH) configuration index indicating a preamble format among a plurality of formats;
A process of setting target power based on initial power, delta-preamble value, power ramping step, and power ramping counter,
Including transmitting a random access preamble to the base station based on the set target power,
The delta-preamble value is related to the preamble format and subcarrier spacing.
According to paragraph 1,
The target power is set by the following formula:
PREAMBLE_RECEIVED_TARGET_POWER = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) Х PREAMBLE_POWER_RAMPING_STEP,
Here, the PREAMBLE_RECEIVED_TARGET_POWER is the target power, preambleReceivedTargetPower is the initial power, DELTA_PREAMBLE is the delta-preamble value, the PREAMBLE_POWER_RAMPING_COUNTER is the power ramping counter, and the PREAMBLE_POWER_RAMPING_STEP is a power ramping step.
According to paragraph 1,
The method wherein the initial power and the power ramping step are set by higher layer signaling.
According to paragraph 1,
A method in which the delta-preamble value is related to a power offset.
According to paragraph 1,
When the subcarrier spacing is 15 kHz (kilohertz), the delta-preamble value is identified as one of 0, 3, 5, 8, and 11 dB (decibel),
When the subcarrier spacing is 30 kHz, the delta-preamble value is identified as any one of 3, 6, 8, 11, and 14 dB,
When the subcarrier spacing is 60 kHz, the delta-preamble value is identified as any one of 6, 9, 11, 14, and 17 dB,
When the subcarrier spacing is 120 kHz, the delta-preamble value is identified as any one of 9, 12, 14, 17, and 20 dB.
In a method performed by a base station in a wireless communication system,
A process of transmitting random access configuration information including information on a physical random access channel (PRACH) configuration index indicating a preamble format among a plurality of formats to a user equipment (UE). class,
Including the process of receiving a random access preamble related to target power from the terminal,
The target power is related to initial power, delta-preamble value, power ramping step, and power ramping counter,
The delta-preamble value is related to the preamble format and subcarrier spacing.
According to clause 6,
The target power is set by the following formula:
PREAMBLE_RECEIVED_TARGET_POWER = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) Х PREAMBLE_POWER_RAMPING_STEP,
Here, the PREAMBLE_RECEIVED_TARGET_POWER is the target power, preambleReceivedTargetPower is the initial power, DELTA_PREAMBLE is the delta-preamble value, the PREAMBLE_POWER_RAMPING_COUNTER is the power ramping counter, and the PREAMBLE_POWER_RAMPING_STEP is a power ramping step.
According to clause 6,
The method wherein the initial power and the power ramping step are set by higher layer signaling.
According to clause 6,
A method in which the delta-preamble value is related to a power offset.
According to clause 6,
When the subcarrier spacing is 15 kHz (kilohertz), the delta-preamble value is identified as one of 0, 3, 5, 8, and 11 dB (decibel),
When the subcarrier spacing is 30 kHz, the delta-preamble value is identified as any one of 3, 6, 8, 11, and 14 dB,
When the subcarrier spacing is 60 kHz, the delta-preamble value is identified as any one of 6, 9, 11, 14, and 17 dB,
When the subcarrier spacing is 120 kHz, the delta-preamble value is identified as any one of 9, 12, 14, 17, and 20 dB.
In a terminal (user equipment, UE) in a wireless communication system,
A transceiver,
Comprising at least one processor coupled to the transceiver,
The at least one processor,
From the base station, receive random access configuration information including information about a PRACH (physical random access channel) configuration index indicating a preamble format among a plurality of formats,
Set the target power based on the initial power, delta-preamble value, power ramping step, and power ramping counter,
is set to transmit a random access preamble to the base station based on the set target power,
The delta-preamble value is related to the preamble format and subcarrier spacing.
According to clause 11,
The target power is set by the following formula:
PREAMBLE_RECEIVED_TARGET_POWER = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) Х PREAMBLE_POWER_RAMPING_STEP,
Here, the PREAMBLE_RECEIVED_TARGET_POWER is the target power, preambleReceivedTargetPower is the initial power, the DELTA_PREAMBLE is the delta-preamble value, the PREAMBLE_POWER_RAMPING_COUNTER is the power ramping counter, and the PREAMBLE_POWER_RAMPING_STEP is a power ramping step.
According to clause 11,
The initial power and the power ramping stage are set by higher layer signaling.
According to clause 11,
The delta-preamble value is related to a power offset.
According to clause 11,
When the subcarrier spacing is 15 kHz (kilohertz), the delta-preamble value is identified as one of 0, 3, 5, 8, and 11 dB (decibel),
When the subcarrier spacing is 30 kHz, the delta-preamble value is identified as any one of 3, 6, 8, 11, and 14 dB,
When the subcarrier spacing is 60 kHz, the delta-preamble value is identified as any one of 6, 9, 11, 14, and 17 dB,
When the subcarrier spacing is 120 kHz, the delta-preamble value is identified as any one of 9, 12, 14, 17, and 20 dB.
In a base station in a wireless communication system,
A transceiver,
Comprising at least one processor coupled to the transceiver,
The at least one processor,
Transmits random access configuration information including information on a physical random access channel (PRACH) configuration index indicating a preamble format among a plurality of formats to a user equipment (UE),
is set to receive a random access preamble related to target power from the terminal,
The target power is related to initial power, delta-preamble value, power ramping step, and power ramping counter,
The delta-preamble value is related to the preamble format and subcarrier spacing.
According to clause 16,
The target power is set by the following formula:
PREAMBLE_RECEIVED_TARGET_POWER = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) Х PREAMBLE_POWER_RAMPING_STEP,
Here, the PREAMBLE_RECEIVED_TARGET_POWER is the target power, preambleReceivedTargetPower is the initial power, DELTA_PREAMBLE is the delta-preamble value, the PREAMBLE_POWER_RAMPING_COUNTER is the power ramping counter, and the PREAMBLE_POWER_RAMPING_STEP is a power ramping step.
According to clause 16,
A base station wherein the initial power and the power ramping stage are set by higher layer signaling.
According to clause 16,
The delta-preamble value is related to a power offset.
According to clause 16,
When the subcarrier spacing is 15 kHz (kilohertz), the delta-preamble value is identified as one of 0, 3, 5, 8, and 11 dB (decibel),
When the subcarrier spacing is 30 kHz, the delta-preamble value is identified as any one of 3, 6, 8, 11, and 14 dB,
When the subcarrier spacing is 60 kHz, the delta-preamble value is identified as any one of 6, 9, 11, 14, and 17 dB,
When the subcarrier spacing is 120 kHz, the delta-preamble value is identified as any one of 9, 12, 14, 17, and 20 dB.

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