KR20200016992A - Communication method and device based on frame structure - Google Patents

Abstract

The present disclosure relates to a 5 ^th generation (5G) or pre-5G communication system for supporting higher data rates after 4 ^th generation (4G) communication systems such as Long Term Evolution (LTE). A method is provided for operating a user equipment (UE) in a wireless communication system. 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, time-of the anchor subband Acquiring random access configuration information according to frequency resources, performing a random access process according to the random access configuration information, completing uplink synchronization, and acquiring control information in a control channel band; Accordingly, the step of performing data communication with the base station in the data transmission band.

Description

Communication method and device based on frame structure

TECHNICAL FIELD This disclosure relates generally to wireless communication systems, and more particularly to communication methods and apparatus based on frame structures, methods and apparatus for determining random access preamble transmission power, user equipment (UE), base stations and associated computer readouts. To a possible medium.

Efforts have been made to develop an improved 5 ^th generation (5G) or pre-5G communication system to meet the increasing demand for wireless data traffic after commercialization of 4 ^th generation (4 ^th ) communication systems. For this reason, a 5G communication system or a pre-5G communication system is called a Beyond 4G Network communication system or a Long Term Evolution (LTE) system (Post LTE) system.

In order to achieve high data rates, 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, such as the 60 Gigabit (60 GHz) band). In order to mitigate the path loss of radio waves and increase the propagation distance of radio waves in the ultra-high frequency band, beamforming, massive array multiple input / output (Full-Dimensional MIMO, FD-MIMO) in 5G communication systems Array antenna, analog beam-forming, and large scale antenna techniques are discussed.

In addition, in order to improve the network of the system, 5G communication system has evolved small cells, advanced small cells, cloud radio access network (cloud RAN), ultra-dense network (ultra-dense network) , Device to device communication (D2D), wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), and interference cancellation And other technology developments are being made. In addition, in 5G systems, Hybrid Frequency Shift Keying and Quadrature Amplitude Modulation (FQAM) and sliding window superposition coding (SWSC), Advanced Coding Modulation (ACM), and Filter Bank Multi Carrier (FBMC), an advanced access technology ), Non Orthogonal Multiple Access (NOMA), and Spar Code Multiple Access (SCMA) are being developed.

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

Embodiments of the present disclosure provide a communication method and apparatus based on a frame structure capable of greatly increasing scheduling flexibility and improving spectrum utilization while securing advantages of existing time division duplex and frequency division duplex.

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

According to various embodiments of the present disclosure, a method of operating a 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. Acquiring 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 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 a 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 may further include 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 generates the random access configuration information. Transmitting the access configuration information to a user equipment (UE).

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

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

The method and apparatus according to various embodiments of the present disclosure can greatly increase scheduling flexibility and improve scheduling flexibility while taking advantage of existing time division duplex and frequency division duplex.

The method and apparatus according to various embodiments of the present disclosure may be applicable to all preamble formats in a future wireless communication system to determine the random access preamble transmission power proposed in the present disclosure, and to efficiently use the preamble transmission power in the random access process. Can adjust, and also improve the probability of success of random access of the UE in case of controlling the interference, can significantly improve the performance of the future wireless communication system, 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.
2 illustrates a BS in a wireless communication system according to various embodiments of the present disclosure.
3 illustrates a terminal in a wireless communication system according to various embodiments of the present disclosure.
4 illustrates a communication interface in a wireless communication system according to various embodiments of the present disclosure.
5 shows a schematic diagram of an FDD frame structure in the prior art.
6 shows a schematic diagram of a TDD frame structure in the prior art.
7 illustrates a frame structure according to various embodiments of the present disclosure.
8 is a flowchart illustrating a communication method based on a frame structure of a terminal according to various embodiments of the present disclosure.
9 is a flowchart illustrating a communication method based on a frame structure of a base station according to various embodiments of the present disclosure.
10 shows a schematic diagram of a channel structure adopted in the first embodiment of the present disclosure.
11A illustrates a schematic diagram of a transmission mode of a system information block according to various embodiments of the present disclosure.
11B is a schematic diagram of another transmission mode of a system information block according to various embodiments of the present disclosure.
12 is a schematic diagram of a control channel according to various embodiments of the present disclosure.
13 is a schematic diagram of an anchor subband structure according to various embodiments of the present disclosure.
14 is a schematic flowchart of an uplink data communication according to various embodiments of the present disclosure.
15 is a schematic diagram of timing division in uplink and downlink data transmission according to various embodiments of the present disclosure.
16 is a schematic diagram of a channel structure according to Embodiment 3 of the present disclosure.
17 is a schematic diagram of another channel structure according to Embodiment 3 of the present disclosure.
18 is a schematic diagram of a structure of a communication device based on a frame structure at a terminal side according to various embodiments of the present disclosure.
19 is a schematic diagram of a structure of a communication device based on a frame structure at a base station according to various embodiments of the present disclosure.
20 schematically illustrates an example wireless communication system, in accordance with various embodiments of the present disclosure.
21 schematically illustrates a flowchart of a method of determining a random access preamble transmission power performed at a base station according to various embodiments of the present disclosure.
22 is a schematic structural diagram of a base station according to various embodiments of the present disclosure.
23 is a flowchart illustrating a method of determining a random access preamble transmission power performed in a UE according to various embodiments of the present disclosure.
24 schematically illustrates a structural schematic diagram of a UE according to various embodiments of the present disclosure.

The present disclosure provides a communication method and communication apparatus 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 accompanying drawings.

Hereinafter, embodiments of the present disclosure will be described in detail. Examples of these embodiments are shown in the accompanying drawings, where like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions. The embodiments described with reference to the accompanying drawings are exemplary and merely used to describe the present disclosure, and the present disclosure should not be considered to be limited thereto.

Those skilled in the art will understand that the singular forms may also include the plural forms unless the context clearly dictates otherwise. The term "comprising" as used herein refers to the presence of a feature, integer, step, operation, element, and / or component, but one or more other features, integers, steps, operation, element, component, and / or their It will also be understood that it does not exclude the presence or addition of a combination. When an element is referred to as being "connected" or "coupled" to another component, it will be understood that elements may be directly connected or coupled to or interposed with other elements. Also, as used herein, “connecting” or “coupling” may include being connected or coupled wirelessly. The term "and / or" as used herein includes any and all combinations of one or more related listed items.

Unless defined otherwise, those skilled in the art should understand that all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. . It is also to be understood that terms such as commonly defined terms used in the prior art should be interpreted to have a meaning consistent with the meaning in the context of the prior art, and shall not be construed in an ideal or overly formal sense unless specifically defined herein. You have to understand.

As used herein, "terminal" and "terminal device" are devices having reception and transmission hardware capable of performing bidirectional communication over a bidirectional communication link, as well as a radio signal receiver device that is a device having only a radio signal receiver without a transmission capability. It will be understood by those skilled in the art that the device includes an apparatus with phosphorus receiving and transmitting hardware. Such a device may be a cellular or other communication device having a single line display or a multi-line display or a cellular or other communication device without a multi-line display; Personal Communication Service (PCS), which may be a combination of voice, data processing, fax, and / or data communication functions; A personal digital assistant (PDA), which may include a radio frequency (RF) receiver, a pager, internet / intranet access, a web browser, a node pad, a calendar, and / or a global positioning system (GPS) receiver; It may include 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, a "terminal", "terminal device" may be portable, transportable, vehicle (aviation, marine and / or land) installation, or may be adapted and / or configured to operate locally. It can operate in distributed form on Earth and / or elsewhere in the universe. As used herein, "terminal" and "terminal device" are also used as communication terminals, Internet terminals, music / video playback terminals, such as PDAs, mobile Internet devices (MIDs) and / or mobile phones with music / video playback functions, or Smart TVs, set-top boxes and other devices. Also, "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 techniques that use both hardware and software, and thus various embodiments of the present disclosure may not exclude the view of software.

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, a user equipment (UE), a base station, and a computer readable medium associated therewith.

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

In addition, although the present disclosure will describe various embodiments based on terms used in some communications standards (eg, 3rd Generation Partnership Project (3GPP)), these are merely examples for illustration. Various embodiments of the present disclosure may be readily modified and applied to other communication systems.

1 illustrates a wireless communication system according to various embodiments of the present disclosure. 1, a base station (BS) 110, a terminal 120, and a terminal 130 are shown as part of nodes that use a wireless channel in a wireless communication system. Although FIG. 1 shows only one BS, another BS that is the same as or similar to 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 predetermined geographic area based on the distance over which a signal 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.

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 machine type communication (MTC) and may not be carried by a user. Each of terminals 120 and 130 may be referred to as a "user equipment", "mobile station", "subscriber station", "remote terminal", "wireless terminal" or "user device" and "terminal."

The BS 110, the terminal 120, and the terminal 130 may transmit and receive wireless signals in the millimeter wave (mmWave) band (eg, 28 GHz, 30 GHz, 38 GHz, and 60 GHz). In this case, 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, the terminal 120, and the terminal 130 may allocate directionality to the transmission signal and the reception 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 having 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 symbol on the first antenna port is transmitted can be deduced from the channel on which the symbol on the second antenna port is transmitted, the first and second antenna ports are quasi-identical. Is considered to be in Large-scale characteristics may include one or more of delay spread, Doppler spread, Doppler transition, average gain, average delay, and spatial Rx parameters.

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 term "-module", "-unit" or "-group" as used below may refer to a unit for processing at least one function or operation and may be implemented in hardware, software, or a combination of hardware and software. Can be.

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 the baseband signal and the bitstreams according to the physical layer standard of the system. For example, in data transmission, the wireless communication interface 210 generates complex symbols by encoding and modulating the transmit bitstreams. In addition, upon receiving data, the wireless communication interface 210 demodulates and decodes the baseband signal to reconstruct the received bitstreams.

In addition, the wireless communication interface 210 up-converts the baseband signal into a radio frequency (RF) band signal and transmits it through the antenna, and then down-converts the RF band signal received through the antenna into the baseband signal. To this end, the wireless communication interface 210 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter, and the like. In addition, the wireless communication interface 210 may include a plurality of transmit / receive paths. In addition, the wireless communication interface 210 may include at least one antenna array composed 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, and the like. The digital unit may be implemented as at least one processor (eg, digital signal processor (DSP)).

The wireless communication interface 210 transmits and receives signals as described above. Thus, the wireless communication interface 210 may be referred to as a "transmitter", "receiver" or "transceiver". In addition, in the following description, transmission and reception performed over a wireless channel may be used to have a meaning including 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 another node, for example, another access node, another BS, a higher node, or a core network, into a physical signal, and converts the physical signal received from the other node into a bit. Convert to streams.

The storage unit 230 stores data such as a basic program, an application, and setting information for the operation of the BS 110. The storage unit 230 may include volatile memory, nonvolatile memory, or a combination of volatile memory and nonvolatile memory. In addition, the storage unit 230 provides stored data in response to a request from the 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. The controller 240 also writes data to the storage unit 230 and reads the recorded data. The controller 240 may perform the functions of the protocol stack required by the communication standard. 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 of the present disclosure, the controller 240 may include a command / code temporarily present in the controller 240, a storage space for storing the command / code, or a part 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 a time-frequency resource of an anchor subband, and Obtain random access configuration information according to 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 According to the information, data communication can be performed with the base station in the data transmission band. For example, the controller 240 can control the base station to perform operations in accordance with example embodiments of the present disclosure.

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. As used herein, the term "-module", "-unit" or "-group" may refer to a unit that processes at least one function or operation, and may be implemented in hardware, software, or a combination of hardware and software. Can be.

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

In addition, the communication interface 310 may include a plurality of transmit / receive paths. In addition, communication interface 310 may include at least one antenna array comprised of a plurality of antenna elements. In hardware terms, the wireless communication interface 210 can include digital circuits and analog circuits (eg, radio frequency integrated circuits (RFICs)). Digital circuits and analog circuits may be implemented as one package. The digital circuit may be implemented as at least one processor (eg, DSP). The communication interface 310 may include a plurality of RF chains. The communication interface 310 may perform beamforming.

The communication interface 310 transmits and receives signals as described above. Thus, communication interface 310 may be referred to as a "transmitter", "receiver" or "transceiver". In addition, in the following description, transmission and reception performed via a wireless channel are used to have a meaning including 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 the operation of the terminal 120. The storage unit 320 may include volatile memory, nonvolatile memory, or a combination of volatile memory and nonvolatile memory. In addition, the storage unit 320 provides the stored data in response to a request from the controller 330.

The controller 330 controls the overall operation of the terminal 120. For example, the controller 330 transmits and receives a signal through the communication interface 310. The controller 330 also writes data to the storage unit 320 and reads the recorded data. The controller 330 may perform the functions of the protocol stack required by the communication standard. 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 the processor. In addition, a portion of the communication interface 310 or controller 330 may be referred to as a communication processor (CP). According to various embodiments, the controller 330 may include a command / code temporarily present in the controller 330, a storage space for storing the command / code, or a part 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 anchors Acquire random access configuration information according to 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 a 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 exemplary embodiments of the present disclosure.

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

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

Encoding and circuit 402 perform 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. The encoding and circuit 402 generates modulation symbols by performing constellation mapping.

The digital circuit 404 performs beamforming on the digital signal (eg, modulation symbols). To this end, the digital circuit 404 doubles the modulation symbols by beamforming the weights. Beamforming weights may be used to change the magnitude and phase of the signal and may be referred to as a "precoding matrix" or "precoder". The digital circuit 404 outputs the digitally beamformed modulation symbols to the plurality of transmission paths 406-1 through 406-N. In this case, according to a multiple input multiple output (MIMO) transmission scheme, modulation symbols may be multiplexed or the same modulation symbols may be provided in the plurality of transmission paths 406-1 to 406 -N.

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

The analog circuit 408 performs beamforming on the analog signals. To this end, the digital circuit 404 doubles 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 through 406 -N and the antennas, the analog circuit 408 can be configured in various ways. For example, each of the plurality of transmission paths 406-1 through 406 -N may be connected to one antenna array. In another example, the plurality of transmission paths 406-1 through 406 -N may be connected to one antenna array. In another example, the plurality of transmission paths 406-1 through 406 -N may be adaptively connected to one antenna array or connected to two or more antenna arrays.

The methods according to the embodiments mentioned in the claims and / or the 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 the computer readable storage medium may be configured to be executed by one or more processors in the electronic device. At least one program may include instructions for causing an electronic device to perform a method 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), DVD (digital versatile disc) or other type of optical storage device or a magnetic cassette including a magnetic cassette. Alternatively, any or all combinations of some or all may form the memory in which the program is stored. In addition, a plurality of such memories may be included in the electronic device.

The programs may also be stored in an attached storage device accessible via a communication 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. Such storage devices can access electronic devices through external ports. In addition, a separate storage device on the communication network may access the portable electronic device.

In the above-described specific embodiments of the present disclosure, the components included in the present disclosure are expressed in the singular or plural, according to the specific embodiments presented. However, the singular form or the plural form is selected for convenience of description in accordance with a given situation, and the various embodiments of the present disclosure are not limited to a single element or a plurality of elements. In addition, a plurality of elements represented herein may be composed of a single element, a single element of the present specification may be composed of a plurality of 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 details may be made without departing from the scope of the present disclosure. Therefore, 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 in an illustrative embodiment, various changes and modifications may be suggested to one 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 growing demand for the mobile Internet and the Internet of Things (IoT), presents an unprecedented challenge for future mobile communications technologies. For example, according to ITU-R M., issued 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 equipment 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 equipment will increase further. In response to this unprecedented challenge, the telecommunications industry and academia have conducted extensive research into fifth generation (5G) mobile communications technologies. Currently, the basic framework and overall goals of 5G in the future are discussed in ITU's ITU-R M. report, which details 5G demand forecasts, application scenarios, and various important performance indicators. In view of the new needs of 5G, ITU-R M. from ITU provides information related to 5G technology trends, including system throughput, consistency of user experience, IoT, latency, energy efficiency, cost, network flexibility, support for new services, and It addresses important issues such as significant improvements in scalability to support flexible spectrum utilization.

Duplex mode in wireless communication, which is an important basis for designing a wireless interface in wireless communication, refers to a processing mode of bidirectional data communication for uplink and downlink, and is not an exception in the development of 5G. Currently, frequency division duplex (FDD) and time division duplex (TDD) are the two main duplex modes, E-UTRA (E-UTRA) established by 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 civilian communication systems, such as long term evolution (LTE) system corresponding to evolved universal terrestrial radio access (LTE) protocol.

In the FDD mode, the uplink and the downlink communicate using paired frequency resources that satisfy a specific duplex interval; In the 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 physical layer designs, such as frame structures. 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 radio frame of 10-ms consists of 10 subframes of 1-ms, 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 radio frame of 10-ms is composed of 10 subframes of 1-ms; Unlike the FDD mode frame structure, uplink and downlink communications in TDD mode share the same frequency resources distinguished by time resources. For example, in the configuration of FIG. 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 the downlink communication from affecting the uplink communication, a specific subframe is introduced into the TDD mode frame structure, that is, the subframes 1 and 6 of FIG. 6. The specific subframe consists of three domains, a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS). In the TDD mode frame structure, subframes 1 and 5 and DwPTS are always used for downlink transmission, and subframes following UpPTS and UpPTS are always used for uplink transmission. The GP is a guard interval between the downlink communication and the uplink communication, so that the uplink data communication is not affected by the downlink communication. The TDD mode in LTE is flexibly configured and can support asymmetric services between uplink and downlink data communications. Table 1 shows various TDD mode configurations in LTE, where D indicates that a subframe is used for downlink communication, U indicates that a subframe is used for uplink communication, and S indicates a specific subframe.

Table 1: Uplink-Downlink Configuration in TDD Mode of LTE

Here, each of the two duplex modes has unique advantages. Specifically, in the FDD mode, uplink and downlink data communication must be performed in the paired frequency bands, and pairing of uplink and downlink frequencies must satisfy a specific duplex interval, which is 5G high frequency and large bandwidth. Easily generate spectral fragments in terms of spectral splitting when developing to; In the case of the TDD mode, since uplink and downlink data communication is performed using the same frequency band, the TDD mode is advantageous in flexibility of frequency resource utilization, and can provide more support for asymmetric services. Has spectral efficiency. In the case of FDD, since it is the spectrum being paired, there are always resources available in uplink and downlink resources, thus acknowledgment / non-acknowledge (ACK / NACK) of, for example, a hybrid automatic retransmission request (HARQ). Scheduling of uplink control signaling such as information and channel state information (CSI) and terminal feedback may be more timely, thereby reducing feedback delay of the air interface and improving scheduling efficiency; For TDD, the acquisition of CSI can be greatly simplified because the different uplink and downlink slot configurations not only lead to more complex related designs, but also because the TDD mode is advantageous in uplink and downlink channel interactivity. .

Large scale MIMO technology can be adopted in 5G to further improve spectral efficiency, while 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 mode, channel interactivity can be used to reduce the overhead of training and feedback, making TDD mode more attractive for large scale MIMO technology. However, because low delay is required, the transmission time interval (TTI) of the air interface must be further shortened, and control signaling must be more timely, which makes the design of the TDD mode more complicated.

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

Duplex mode in LTE is inflexible, requires paired spectrum for the FDD mode, and the scheduling and HARQ processes of the TDD mode are quite complex, so if the present duplex mode continues to be used, the spectral efficiency of the system And performance can no longer be improved.

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 or the like for the base station to identify the terminal and the like. The performance of random access has a direct impact on the experience of the terminal. In a conventional wireless communication system such as long term evolution (LTE) and long term evolution-advanced (LTE-A), the random access process includes initial link establishment, cell handover, uplink reconfiguration, and radio resource control (RRC) connection. It is applied to various scenarios such as resetting, and is classified into contention-based random access and contention-free random access according to whether the terminal occupies the preamble resources entirely. 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. Such a collision can lead to preamble transmission failure. The method of designing a random access preamble retransmission method to improve the probability of success 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 is a timing advance command determined based on a random access preamble identifier, a delay estimate between the terminal and the base station, and a TC-RNTI (temporary). cell-radio network temporary identifier) and time-frequency resources allocated for the next uplink transmission of the terminal.

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

In step 4, the base station transmits to the terminal a collision resolution identifier including the terminal identifier of the terminal that has been resolved. After detecting its identifier, the terminal upgrades the temporary cell-wireless network temporary identifier to a cell-wireless network temporary identifier (abbreviated C-RNTI) and transmits an acknowledgment (abbreviated ACK) signal to the base station. After completing the random access process, wait for scheduling by the base station, otherwise the terminal will start a new random access process after the delay.

In the case of 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 the preamble, it is not necessary to select the preamble arbitrarily, and the allocated preamble can be used. After detecting the allocated preamble, the base station may transmit a corresponding RAR including information such as timing advance and uplink resource allocation. After receiving the RAR, the terminal considers that the uplink synchronization is completed, and waits for further scheduling by the base station. Thus, the process of initial access and contention-free random access includes only two steps: a first step of transmitting a preamble; And a second step of transmitting the RAR.

In the first step, the base station transmits a preamble, and the transmission 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 the preambleInitialReceivedTamble is set by the power layer, and the DELETE Power offset is transmitted by the DELTA Power. , PREAMBLE_TRANSMISSION_COUNTER is the number of random process attempts (including initial attempts and subsequent retries), and powerRampingStep is a power ramping step configured by a higher layer.

, PREAMBLE_RECEIVED_TARGET_POWER+

}인 것으로 결정하고, 여기서

는 단말기의 최대 송신 전력(LTE/LTE-A에서 23 dBm)이고,

는 경로 손실 값이다.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 corresponding relationship between the transmit power offset PREAMBLE_RECEIVED_TARGET_POWER and the random access preamble format is shown in Table 2:

Table 2 Correlation Table between Preamble Format and DELTA_PREAMBLE

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

Future wireless communication systems can be classified into approximately two categories, less than 6 GHz and more than 6 GHz, depending on their carrier range. Further, 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 may be greater than 40 in a random access process of a future wireless communication system. In the case where transmission power offsets having only three different values continue to be used as shown in Table 2 above, the requirements of the random access process in future wireless communication networks cannot be met. Accordingly, there is a need in the future wireless communication system to design new transmit power offsets for new random access preamble formats designed based on new carrier range and subcarrier spacing size, and to determine the random access preamble transmit power.

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

Step 1: Downlink Synchronization: The terminal completes the downlink synchronization through the downlink synchronization process, reads the downlink transmission portion of the anchor subband to obtain a system bandwidth and bandwidth structure, and accordingly, locates the anchor subband and Information such as time structure, positions of uplink control channel and downlink control channel, and bandwidth of guard band are determined.

Step 2: Uplink random access: The terminal completes the random access process by transmitting a preamble sequence on the uplink transmission portion 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 Fig. 7 is adopted, which is four frequency bands, that is, 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 transmission content in the band center anchor subband is fixed. This transmission content includes a downlink synchronization signal, a downlink transmission content required for an access system such as a downlink broadcast channel, and an 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 a frequency division mode or a time division mode.

The data transmission band transmits uplink / downlink data in a frequency division mode, a time division mode, or a multi-carrier division duplexing (MDD) mode.

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

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

As shown in FIG. 8, a 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 a time-frequency resource 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, obtaining random access configuration information according to the time-frequency resources of the anchor subband,

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

Acquiring random access configuration information carried in the detected system information block.

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

Determining the position 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 acquiring random access configuration information carried in the master information block.

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

Determining the position 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 carried in the system information block.

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

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

Determining a location of a time-frequency resource of the system information block according to the time-domain index; And

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 the data transmission band. In this step, performing the random access process according to the random access configuration information,

Transmitting the random access preamble sequence to the base station through the uplink anchor subband according to the random access configuration information;

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

Detecting a contention resolution in the downlink anchor subband.

Alternatively, the performing of the random access process according to the random access configuration information,

Transmitting, according to the random access configuration information, the random access preamble sequence to the base station through the uplink anchor subband;

Detecting control information of an uplink anchor subband used for transmitting 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 an uplink data transmission band; And

Detecting a contention resolution in the downlink data transmission band.

Step 803: Acquire control information in the control channel band, and perform data communication with the base station in the data transmission frequency band.

In this step, acquiring control information in the control channel band, and performing data communication with the base station in the data transmission frequency band according to the control information include two parts, namely, uplink data communication and downlink data communication. ;

In this case, when detecting the downlink control information transmitted by the downlink control channel and receiving the downlink control information transmitted thereto, receiving downlink data in the corresponding downlink data transmission band according to the resource allocation indication carried in the downlink control information. ; And

When the scheduling request is transmitted in the uplink control channel, the downlink control channel is detected after the second preset time interval, and the downlink control information transmitted to the uplink resource is detected, the uplink resource carried in the downlink control information. Allocating uplink data in a corresponding uplink data transmission band according to the allocation indication.

This way,

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 the frame structure. As shown in FIG. 9, the method includes:

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

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

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

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

Detecting message 3 in the uplink anchor subband; And

Transmitting a contention resolution on the downlink anchor subband.

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

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

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

Detecting message 3 in the uplink data transmission band; And

Transmitting a contention resolution in the downlink data transmission band.

Step 902: Perform 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 in the uplink control channel and transmitting the downlink control information in the downlink control channel so that the terminal detects the downlink control information in the downlink control channel.

Here, this method,

Transmitting a configuration index of the guard band and / or guard time 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, that is, 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 described in detail in three specific embodiments as follows.

Example 1

In this embodiment, a communication method based on the frame structure is introduced in combination with a particular system. The channel frame structure adopted in this embodiment is as shown in FIG. 10 which is a 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 comprises a plurality of subcarriers, and the subcarriers are assigned to functions. Thus divided into different subbands. In Figure 10, these subbands, according to functions, control channel 1 and control channel 2 located at the band edge, respectively, indicating an uplink control channel and a downlink control channel, or a downlink control channel and an uplink control channel; An anchor subband located at the center of the band, used for transmitting uplink and downlink data required for system access; A data channel located between the control channel and the anchor subband, used for transmitting 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 in units of a subframe or a subframe group composed of a plurality of subframes. The downlink channel in the anchor subband is used to transmit a broadcast channel, a synchronization signal, etc., for example, a synchronization signal block consisting of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and broadcast channels. The uplink channel in the anchor subband is used to transmit a random access channel or the like. One possible way is that the anchor subbands of some fixed subframes are dedicated to transmitting the downlink synchronization signal block. Taking a radio frame comprising seven subframes (each subframe is named subframe 0 through 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 subbands, and the anchor subbands of other subframes are determined according to the configuration. A simple example is that the transmission directions of other subframes are known in the 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, the downlink / uplink control channel appears alternately at the band edges. For example, the downlink control channel of 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 the odd index subframes is at the lower edge of the band and the uplink control channel is at the upper edge of the band. The frequency hopping mode, i.e., 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 uplink data transmission and downlink data transmission by adopting time division or subband frequency division for dividing uplink and downlink or by adopting subcarrier level division. This is distinguished.

In order to prevent interband interference or uplink-downlink crosstalk, a guard band is added between different channels. While switching between uplink and downlink in the same subband, a guard time is added to protect switching between uplink and downlink.

The process of the terminal for network and data communication is 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 may 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. The information read from the master information block should include the system bandwidth and the locations of time-frequency resources of the system information block. The terminal includes a transmission time position of the uplink portion on the anchor subband, random access channel configuration information, configuration information of the random access preamble resource pool, and a bandwidth of each subband, that is, a time-frequency resource position. 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 for the synchronization signal block or the time-domain index, and the terminal determines the position of the system information block according to the delay or time domain index.

In another way, 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 position of the system information block and reads the system information block at the time-frequency resource position. The above two approaches are shown in FIGS. 11A and 11B.

The terminal determines the location, bandwidth, and bandwidth of the guard band of each subband through the contents of the system information block. One possible way is to inform the system information block of the control channel bandwidth at the band edge and the switch point of the downlink / uplink control channel in the radio frame / subframe. For example, the terminal knows the number of physical resource blocks of the system through the system bandwidth in the master information block. Then, the terminal knows 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 determines 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 of the first subframe of the radio frame located at the upper edge of the band; An uplink control channel is transmitted in the control subband of the first subframe of the radio frame located at the lower edge of the band; It is assumed that one radio frame consists of seven subframes each consisting of 14 symbols. And it is assumed that a switch time of one symbol is required during the switching between the downlink and the uplink. From the information of the system information block, it can be seen that the number of physical resource blocks occupied by the control subband is three, and the number of switch points of the downlink / uplink control channel in the radio frame is one. The control channel of the band edge is as shown in FIG. Another possible way is to preconfigure some possible uplink and downlink configurations of the control channel in the form of an index table, the corresponding uplink and downlink configurations of the control channel being informed in the system information block.

Similarly, the terminal determines the distribution of the uplink and downlink subbands for the anchor subbands through the contents of the system information block. For example, it is configured by notifying the radio frame or the switch point in the subframe, or by prefixing the uplink and the downlink to notify 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 of the upper edge of the band or those in the control subbands of the lower edge of the band. In this case, only uplink and downlink configurations of the control subband need to be informed.

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

There are two ways to perform the random access process:

a. The random access process is performed only in the anchor subbands. Specifically, the terminal transmits a preamble sequence through a random access channel located in the uplink anchor subband. Thereafter, detection of the random access response is performed at the 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 is composed of two parts, that is, an uplink slot and a downlink slot, as shown in FIG. 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 consist of a plurality of synchronization signal blocks and a plurality of downlink data transmission portions for transmitting a random access response and a contention resolution message. Each uplink slot may include a plurality of random access channels and a plurality of uplink data transmission portions for transmitting message 3.

In order to facilitate detection of the random access response, a common downlink control channel is added to the downlink data transmission part to indicate whether there is a random access response corresponding to the subsequent downlink data transmission part. One possible way is that a common downlink control channel is transmitted at a fixed position (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. If the 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 in the downlink control channel, the random access response is detected to indicate the downlink indicated by the control information. It is decoded in the link data transmission band. If a random access response including 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 the contention resolution message is detected in the downlink data channel.

In this way, while completing the random access process, both the control subband and the data transmission band will be used. In light of the random access response, message 3 and contention resolution information are transmitted based on the scheduled data, so the spectrum utilization efficiency of this approach 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, the terminal performs downlink data in a corresponding downlink data transmission band according to a 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 from the downlink control channel to the terminal after a fixed time or a predetermined time. When the corresponding downlink control information is detected, uplink data is allocated to a corresponding uplink data transmission band according to uplink resource allocation information included therein, and a schematic flowchart of the uplink data communication process is shown in FIG. 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 the time unit and data communication flow of the frame structure in this embodiment.

It should also be noted that in the portion for transmitting uplink data and downlink data in the data transmission band, the control subband and the anchor subband, a reference signal needs to be inserted to estimate the 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.

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 occupants for transmission of downlink and uplink data.

A simple example is shown in FIG. 15, where different transmission orchestration consists 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. Are used to transmit uplink or downlink data. In the frequency domain, guard intervals must be reserved between different transmission directions; In the time domain, guard time must be reserved between different transmission directions, thus ensuring that in the frequency domain and time frequency, residual and intersymbol interference between adjacent bands is smaller.

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

In 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 inter-link interference, a guard band should be inserted when the transmission direction of uplink data and the transmission direction of downlink data in the frequency domain are switched, and the transmission direction of uplink data and the transmission direction of downlink data in the time domain. The guard time must be inserted when this is switched. Insertion of the guard band and guard time for the frame structure provided in this embodiment may be completed by methods of scheduling. With the physical resource block as the base unit, that is, the guard band as one or a plurality of physical resource blocks, the base station can make unscheduled physical resource blocks into the guard band by not scheduling specific physical resource blocks. Similarly, for time-domain resources, these unscheduled time units can also be made guard time by not scheduling a particular subframe / slot / mini slot / symbol.

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

Table 3: Number of subcarriers reserved for guard band

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

In the case of guard time, a predetermined number of symbols / slots / mini slots reserved for cutoff of allocated time resources may also be fixed as guard time in a preset manner. Another possible way is to notify the guard time in the form of an index via a preconfigured index table containing several types of reserved time units. Possible methods are as shown in Table 4.

Table 4: Number of time units reserved for guard time

In the example shown in Table 4 above, the time unit may be a symbol / slot / mini slot or the like. The terminal is notified of the index along with the resource configuration information in a semi-static manner through the downlink control channel or through the high-level signaling configuration. After obtaining the information on 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 the frame structure is introduced in combination with a particular system. In this embodiment, the location of the anchor subbands 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 FIG. In this example, it is ensured that the control subband is still located at the edge of the band, the anchor subband is located near one control subband, and the downlink anchor subband is 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 the data transmission band. The example shown in FIG. 16 is an extreme example.

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

For the channel structure shown in this embodiment, the communication flow between the terminal and the base station also needs to be adjusted accordingly. 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 the system bandwidth information from the master information block in the broadcast channel of the synchronization signal block. Reads the position where the anchor subband is located in 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 the offset of the anchor subband center with respect to the center frequency in the master information block or the system information block indicated by the master information block, where this offset value can be characterized by the number of physical resource blocks. have. 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 may be performed through the index table.

Another possible way 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 acquires the frequency domain position 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. Determine. The structure of the overall system bandwidth is determined with the 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 the uplink / downlink data communication steps may adopt the solutions provided in the above-described embodiments 1 and 2, and thus, Not explained.

Based on the communication method based on the frame structure provided by the present disclosure, the present disclosure further provides a communication apparatus based on the frame structure. As shown in FIG. 18, the apparatus 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 acquire control information in the control channel band and to 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 the 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 the downlink synchronization processing, and obtains a 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 the downlink synchronization processing, and obtains a master information block carried by the broadcast channel in the synchronization signal block; Determine the 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, determines the location of the time-frequency resource of the system information block according to the time-domain index, and And 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 the 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 random access. The message 3 is transmitted in the uplink anchor subband when the response is detected, and the contention resolution is configured 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; Detect control information of an uplink anchor subband used for transmitting a random access preamble sequence in a downlink control channel, and detect and decode a random access response in a downlink data transmission band indicated by the control information; If a random access response including a preamble sequence identifier matching the transmitted random access preamble sequence is detected, transmit message 3 in the uplink data transmission band; And to detect contention resolution in the downlink data transmission band.

Preferably, the communication unit 1803 detects in the downlink control channel, and when detecting downlink control information transmitted to the communication unit 1803 in the corresponding downlink data transmission band according to the resource allocation indication carried in the downlink control information. Downlink control is configured to receive downlink data, and also transmits a scheduling request in the uplink control channel, detects in the downlink control channel after a second preset time interval, and detects downlink control information transmitted to itself. And assigning uplink data to a corresponding uplink data transmission band according to an 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 configured 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 the frame structure. As shown in FIG. 19, the apparatus 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 on 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, which carries 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; And transmit a contention resolution in the downlink anchor subband.

Or, the uplink processing unit 1901 receives random access configuration information, which carries 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 an 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 a 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; The terminal is configured to receive a scheduling request in the uplink control channel and transmit downlink control information in the downlink control channel, so that the terminal detects 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 the 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 the new duplex mode. By adopting a frame structure based on the new duplex mode provided by the present disclosure, it is possible to simultaneously obtain the advantages of traditional time division duplex and frequency division duplex, greatly increasing scheduling flexibility. Specifically, since there is always a control channel, the HARQ process will be greatly simplified and the scheduling delay will be reduced. Furthermore, since no paired spectrum is required, the method provided by the present disclosure improves the utilization ratio of the spectrum to frequency division duplex.

The solution provided by the present disclosure is also more suitable for implementation of large scale MIMO systems since 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, combining the advantages of both types of duplex mode at the same time.

DETAILED DESCRIPTION Hereinafter, embodiments of the present disclosure will be described in detail, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are only examples for describing the present disclosure and should not be construed as limiting the present disclosure.

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

Unless defined otherwise, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. have. Also, it is to be understood that terms such as those defined in the general dictionary have a meaning consistent with the context of the prior art, and that they will not be described in an ideal or too formal sense unless specifically defined herein. .

As used herein, "terminal" and "terminal device" are devices having reception and transmission hardware capable of performing bidirectional communication over a bidirectional communication link, as well as a radio signal receiver device that is a device having only a radio signal receiver without a transmission capability. It will be understood by those skilled in the art that the device includes an apparatus with phosphorus receiving and transmitting hardware. Such a device may be a cellular or other communication device having a single line display or a multi-line display or a cellular or other communication device without a multi-line display; Personal Communication Service (PCS), which may be a combination of voice, data processing, fax, and / or data communication functions; A personal digital assistant (PDA), which may include a radio frequency (RF) receiver, a pager, internet / intranet access, a web browser, a node pad, a calendar, and / or a global positioning system (GPS) receiver; It may include 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, a "terminal", "terminal device" may be portable, transportable, vehicle (aviation, marine and / or land) installation, or may be adapted and / or configured to operate locally. It can operate in distributed form on Earth and / or elsewhere in the universe. As used herein, "terminal" and "terminal device" are also used as communication terminals, Internet terminals, music / video playback terminals, such as PDAs, mobile Internet devices (MIDs) and / or mobile phones with music / video playback functions, or Smart TVs, set-top boxes and other devices. Also, "terminal" and "terminal device" may be replaced with "user" and "UE".

20 illustrates an example wireless communication system 2004 to which example embodiments of the disclosure are applied. In FIG. 20, the UE detects indication information. The 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 may be. In an embodiment of the present disclosure, an access point may be replaced with any of the above terms. As shown in FIG. 20, one or more base stations 2001 and 2002 provide services for various mobile stations (MSs) or UEs or terminal devices or terminals 2003 and 2004 in the service area. For example, the service area may be a cell or a section of a cell. In some systems, one or more BSs can be communicatively coupled to a controller forming an access network, and the controller can be communicatively coupled to one or more core networks. Examples of the present 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 basic 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 includes a base station 2001 and a base station 2002, and the plurality of UEs includes a UE 2003 and a UE 2004. The base station 2001 communicates with the UE 2003 via the UL communication signal 2011 and the DL communication signal 2012. If the base station has a DL packet to be transmitted to the UEs, each UE may obtain 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 a right from the base station to allocate a physical uplink shared channel (PUSCH) or a narrowband uplink shared channel (NPUSCH) including a UL radio resource set. The UE obtains DL or UL scheduling information from the Physical Downlink Control Channel (PDCCH), or MPDCCH, or EPDCCH or NPDCCH dedicated to it. The DL or UL scheduling information and other control information carried on the DL control channel are referred to as downlink control information (DCI). 20 also shows different physical channels in the DL 2012 and UL 2011. DL (2012) is a PDCCH or EPDCCH or NPDCCH or MPDCCH (2021), PDSCH or NPDSCH (2022), Physical Control Formation Indicator Channel (PCFICH) 2023, Physical Multicast Channel (PMCH) 2024, Physical Broadcast Channel (PBCH) 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 DL control channel 2021. PDSCH 2022 transmits data information to the UE. The PCFICH 2023 transmits information for decoding the PDCCH, for example, dynamically indicating the number of symbols used by the PDCCH 2021. The PMCH 2024 carries broadcast / multicast information. The PBCH or NPBCH 2025 carries a Master Information Block (MIB) for early UE discovery and cell-wide coverage. The PHICH carries Hybrid Automatic Repeat reQuest (HARQ) 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, the wireless communications network 2000 uses an OFDMA or multi-carrier architecture, including next-generation single carrier FDMA architecture or multi-carrier OFDMA architecture for adaptive modulation and coding (AMC) and UL transmissions on the DL. FDMA-based single carrier architecture includes Discrete Fourier Transform-Spread Orthogonal Frequency Division Multiplexing (DFT-SOFDM) of Interleaved Frequency Division Multiple Access (IFDMA), Localized FDMA (LFDMA), IFDMA or LFDMA, and also provides a variety of advanced NOMA for OFDMA systems. Non-Orthogonal Multiple Access architectures such as Pattern Division Multiple Access (PDMA), Spar 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 ), Non-Orthogonal Coded Access (NOCA), Interleave Division Multiple Access (IDMA), Repetition Division Multiple Access (RDMA), Group Orthogonal Coded Access (GOCA), Welch-bound equality based Spread MA (WSMA), and the like.

In an OFDMA system, a remote unit is typically provided by allocating DL or UL radio resources that include a subcarrier set for one or more OFDM symbols. Exemplary OFDMA protocols include the LTE and IEEE 802.16 standards developed in the 3GPP UMTS standards. The architecture also provides for transmission techniques 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 or two-dimensional transmissions. Use, or may be based on simpler time and / or frequency division multiplexing / multiple access techniques, or 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.

=T_s/(1/30720)는 기준 샘플링 인터벌에 대한 실제 샘플링 인터벌의 비율이다(여기서 Ts는 실제 샘플링 인터벌(ms)).In the future, the random access preamble format in a wireless communication system may be expressed as shown in Table 5 below. For preamble formats of numbers A1, A2, A3, B1, B2, B3, B4, C0, C2, the μ value can be 0, 1, 2, 3,

= T _s / (1/30720) is the ratio of the actual sampling interval to the reference sampling interval, where Ts is the actual sampling interval in ms.

Table 5 Random Access Preamble Formats

Random access preamble formats are predefined for future wireless communication systems. In the above defined formats, the actual used random access preamble formats (or a combination 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, formats A1 / B1 represent a combination of several A1s and several B1s in a specific order as a format for use, and formats A2 / B2 represent a combination of several A2s and several B2s in a specific order as a format for use. The combination A3 / B3 represents a combination of several A3 and several B3 in a specific order as a format for use. Note that formats A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, 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 further 4 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 will be 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). 15/30/60/120 kHz indicates random access preamble subcarrier spacing of 15 kHz or 30 kHz or 60 kHz or 120 kHz, respectively.

Hereinafter, a flowchart of a method of determining a 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.

21 schematically illustrates a flowchart of a method 200 for determining random access preamble transmit power performed at a base station in accordance with an exemplary embodiment of the present disclosure. As shown in FIG. 21, the method 200 may include step 2101 and step 202.

In 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 the random access configuration information is 9 bits, of which 8 bits are prach-ConfigIndex, numbered 0-255, representing most of the random access configuration information including the random access preamble format (denoted by prach-ConfigIndex). Note that the preamble format may include subcarrier spacing information of the preamble, or may not include subcarrier spacing information of the preamble, and the preamble format indicated by prach-ConfigIndex is A1, A2, A3, B1, or B4. , A1 / B1, A2 / B2, A3 / B3, C0 or C2, the preamble format does not include subcarrier spacing information, and the preamble format indicated by prach-ConfigIndex is 0, 1, 2 or 3 The preamble format includes subcarrier spacing information); One 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 exemplary embodiment, the random access configuration information is included in a broadcast message transmitted to the UE via a physical broadcast channel (PBCH) or a new radio-physical broadcast channel (NR-PBCH). The broadcast message includes carrier range information (above 6GHz or below 6GHz) and Remaining System Information (RSI) indication information of the system. Specifically, the random access configuration information is included in the RMSI indication information.

In one embodiment, the UE may detect the 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 uses the random access preamble subcarrier spacing indication information prach-Msg1SubcarrierSpacing and in the obtained random access configuration information to determine a random access preamble transmit power offset DELTA_PREAMBLE corresponding to the obtained random access preamble format, as described in detail below. A random access preamble format may be obtained based on the random access configuration index prach-ConfigIndex.

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

As shown in FIG. 22, the base station 2200 may be a communication interface 2201, a processing unit, or a processor 2203 for external communication, which may be a single unit or a combination of multiple units for performing different steps of the method. ; When executed by the processor 2203, causes 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 a random access configuration. And a memory 2205 that stores computer executable instructions that cause the information to be sent to the UE.

As described above, the random access configuration index and the 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 of 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 of determining random access preamble transmission power performed at a UE according to an exemplary embodiment of the present disclosure. As shown in FIG. 23, the 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 the random access configuration information is 9 bits, of which 8 bits are prach-ConfigIndex, numbered 0-255, representing most of the random access configuration information including the random access preamble format (denoted by prach-ConfigIndex). Note that the preamble format may include subcarrier spacing information of the preamble, or may not include subcarrier spacing information of the preamble, and the preamble format indicated by prach-ConfigIndex is A1, A2, A3, B1, or B4. , A1 / B1, A2 / B2, A3 / B3, C0 or C2, the preamble format does not include subcarrier spacing information, and the preamble format indicated by prach-ConfigIndex is 0, 1, 2 or 3 The preamble format includes subcarrier spacing information); One 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 from a base station transmitted over a physical broadcast channel (PBCH or NR-PBCH). The broadcast message includes carrier range information (above 6GHz or below 6GHz) and RMSI indication information of the system. Specifically, the random access configuration information is included in the RMSI indication information.

In one embodiment, the UE may detect the 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 the random access preamble subcarrier interval indication information.

As mentioned above, random access preamble formats are predefined for future wireless communication systems. In the above defined formats, the random access preamble formats (or a combination thereof) actually used include 14 formats in total: 0, 1, 2, 3, A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0 and C2. Among these formats, formats A1 / B1 represent a combination of several A1s and several B1s in a specific order as a format for use, and formats A2 / B2 represent a combination of several A2s and several B2s in a specific order as a format for use. The combination A3 / B3 represents a combination of several A3 and several B3 in a specific order as a format for use. Note that formats A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, 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 further 4 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 will be 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). 15/30/60/120 kHz indicates 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 the random access preamble formats and the 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 transmission power offsets DELTA_PREAMBLE.

In operation 2303, the UE may determine a random access preamble transmission power offset DELTA_PREAMBLE corresponding to the obtained random access preamble format.

In an example embodiment, the UE determines the random access preamble transmission power offset DELTA_PREAMBLE corresponding to the obtained random access preamble format by querying a correspondence table that includes at least the random access preamble format and the random access preamble transmission power offsets DELTA_PREAMBLE. Can be.

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

The random access preamble format is independent of 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. Refer to any 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), random access preamble subcarriers It should be noted that it may refer to any formats that depend on the spacing.

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

Table 6 Correlation Table of Random Access Preamble Format and DELTA_PREAMBLE

Another possible correspondence between the random access preamble formats and the random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 7.

Table 7 Correlation Table of Random Access Preamble Format and DELTA_PREAMBLE

Another possible correspondence between the random access preamble formats and the random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 8.

Table 8 Correlation Table between Random Access Preamble Format and DELTA_PREAMBLE

Another possible correspondence between the random access preamble formats and the random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 9.

Table 9 Correlation Table of Random Access Preamble Format and DELTA_PREAMBLE

Another possible correspondence between the random access preamble formats and the 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

Another possible correspondence between the random access preamble formats and the random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 11.

Table 11 Correlation Table of Random Access Preamble Format and DELTA_PREAMBLE

Another possible correspondence between the random access preamble formats and the random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 12.

Table 12 Correlation Table of Random Access Preamble Format and DELTA_PREAMBLE

Another possible correspondence between the random access preamble formats and the 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 can be provided as in Table 14.

Table 14 Correspondence Table of Random Access Preamble Format, Random Access Preamble Subcarrier Interval Information (prach-Msg1SubcarrierSpacing, Msg1SCS) and DELTA_PREAMBLE

Note that 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 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 spacing indication information, and preamble transmit power offsets DELTA_PREAMBLE are shown in Table 16 and Table 17 (Tables 16-1 and 16-2, Subtable, and Table 17-1 and Table 17-2 are subtables of Table 17) provided by partitioning each of Tables 14 and 15 into two subtables based on carrier ranges. It should be noted.

Table 16-1 Correspondence Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 16-2 Correspondence Tables for Random Access Preamble Formats, Msg1SCS and DELTA_PREAMBLE

Table 17-1 Correspondence Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 17-2 Correspondence Tables for 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 transmission power offsets DELTA_PREAMBLE can be provided as in Table 18.

Table 18 Correspondence Table of Random Access Preamble Format, Msg1SCS and DELTA_PREAMBLE

Note that 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 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 spacing indication information, and preamble transmit power offsets DELTA_PREAMBLE are shown in Tables 17 and 18 (where Tables 20-1 and 20-2 are shown in Table 20). Sub table, and Table 21-1 and Table 21-2 are sub tables of Table 21) provided by partitioning each of Table 18 and Table 19 into two sub tables based on carrier ranges. It should be noted.

Table 20-1 Correspondence Table of Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 20-2 Correspondence Tables of Random Access Preamble Formats, Msg1SCS and DELTA_PREAMBLE

Table 21-1 Correspondence Table of Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 21-2 Correspondence Tables for 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 can be provided as in Table 22.

Table 22 Correspondence Table of Random Access Preamble Format, Msg1SCS and DELTA_PREAMBLE

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 spacing indication information, and preamble transmit power offsets DELTA_PREAMBLE are described in Table 24 and Table 25, where Tables 24-1 and 24-2 are shown in Table 24; Subtable, and Tables 25-1 and 25-2 are subtables of Table 25) provided by partitioning each of Tables 22 and 23 into two subtables based on carrier ranges. It should be noted.

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 Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 25-2 Correspondence Tables for Random Access Preamble Formats, 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

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 the random access preamble formats, the random access preamble subcarrier interval indication information, and the preamble transmit power offsets DELTA_PREAMBLE are shown in Table 28 and Table 29, where Table 28-1 and Table 28-2 Sub-table, and Table 29-1 and Table 29-2 are the sub-tables of Table 29, provided by partitioning each of Table 26 and Table 27 into two sub-tables based on carrier ranges It should be noted.

Table 28-1 Correspondence Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 28-2 Correspondence Tables of Random Access Preamble Formats, Msg1SCS, and DELTA_PREAMBLE

Table 29-1 Correspondence Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 29-2 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 can be provided as in Table 30.

Table 30 Correspondence Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

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 the random access preamble formats, the random access preamble subcarrier interval indication information, and the preamble transmit power offsets DELTA_PREAMBLE are shown in Table 32 and Table 33, where Table 32-1 and Table 32-2 Sub table, and Table 33-1 and Table 33-2 are the sub tables of Table 33) provided by dividing each of Tables 30 and 31 into two sub tables based on carrier ranges. It should be noted.

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 Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 33-2 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 can be provided as in Table 34.

Table 34 Correspondence Table of Random Access Preamble Format, Msg1SCS and DELTA_PREAMBLE

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 the random access preamble formats, the random access preamble subcarrier interval indication information, and the preamble transmit power offsets DELTA_PREAMBLE are shown in Table 36 and Table 37 (Tables 36-1 and 36-2 are shown in Table 36). Sub table, and Table 37-1 and Table 37-2 are the sub tables of Table 37) provided by dividing each of Table 34 and Table 35 into two sub tables based on carrier ranges. It should be noted.

Table 36-1 Correspondence Tables for Random Access Preamble Formats, Msg1SCS, and DELTA_PREAMBLE

Table 36-2 Correspondence Tables of Random Access Preamble Formats, Msg1SCS and DELTA_PREAMBLE

Table 37-1 Correspondence Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 37-2 Correspondence Tables for Random Access Preamble Formats, 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 can 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 the random access preamble formats, the random access preamble subcarrier interval indication information, and the preamble transmit power offsets DELTA_PREAMBLE are shown in Table 40 and Table 41, where Tables 40-1 and 40-2 are sub-tables of Table 40; Table, and Tables 41-1 and 41-2 are subtables of Table 41), which can be provided by partitioning each of Tables 38 and 39 into two sub-tables based on carrier ranges. It should be noted that.

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 Tables for 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 can 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 the random access preamble formats, the random access preamble subcarrier interval indication information, and the preamble transmit power offsets DELTA_PREAMBLE are shown in Table 44 and Table 45, where Tables 44-1 and 44-2 are shown in Table 44; Subtable, and Tables 45-1 and 45-2 are subtables of Table 45) provided by partitioning each of Tables 42 and 43 into two subtables based on carrier ranges. It should be noted.

Table 44-1 Correspondence Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 44-2 Correspondence Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 45-1 Correspondence Tables for Random Access Preamble Format, Msg1SCS, and DELTA_PREAMBLE

Table 45-2 Correspondence Tables for Random Access Preamble Formats, Msg1SCS and DELTA_PREAMBLE

Another possible correspondence between the random access preamble formats and the 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 a random access preamble subcarrier interval (display value is 15 · 2 ^μ kHz) and may be 0, 1, 2, 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 the random access preamble formats and the preamble transmit power offsets DELTA_PREAMBLE is random access preambles, as shown in Table 47, where Table 47-1 and Table 47-2 are subtables of Table 47. It should be noted that the table 46 may be provided by dividing Table 46 into two sub-tables.

Table 47-1 Correspondence Table between Random Access Preamble Format and DELTA_PREAMBLE

Table 47-2 Correspondence Table between Random Access Preamble Format and DELTA_PREAMBLE

In Table 47, μ is a parameter representing a random access preamble subcarrier interval (display value is 15 · 2 ^μ kHz) and may be 0, 1, 2, 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.

Another possible correspondence between the random access preamble formats and the random access preamble transmit power offsets DELTA_PREAMBLE can be provided as in Table 48.

Table 48 Correlation Table of Random Access Preamble Format and DELTA_PREAMBLE

In Table 48, μ is a parameter representing a random access preamble subcarrier interval (display value is 15 · 2 ^μ kHz) and may be 0, 1, 2, 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 the random access preamble formats and the preamble transmit power offsets DELTA_PREAMBLE is shown in Table 49 (where Table 49-1 and Table 49-2 are subtables of Table 49), as shown in Table 49: It should be noted that the table 48 may be provided by dividing Table 48 into two sub-tables based on the results.

Table 49-1 Correspondence Table between Random Access Preamble Format and DELTA_PREAMBLE

Table 49-2 Correspondence Table between Random Access Preamble Format and DELTA_PREAMBLE

In Table 49, μ is a parameter indicating a random access preamble subcarrier interval (display value is 15 · 2 ^μ kHz), and may 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 an initial transmit power configured by a higher layer, DELTA_PREAMBLE is a random access preamble transmit power offset, PREMBLE_POWER_RAMPING_COUNTER is a power ramping count, and powerRampingStep is a power ramping step configured by a higher layer.

, PREAMBLE_RECEIVED_TARGET_POWER+

}인 것으로 결정할 수 있으며, 여기서

는 UE의 최대 송신 전력이고,

는 경로 손실 값이다.Thereafter, the UE determines that the final random access preamble transmit power is min {

, PREAMBLE_RECEIVED_TARGET_POWER +

}, Where

Is the maximum transmit power of the UE,

Is the path loss value.

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

As shown in FIG. 24, the UE 2400 may be a communication interface 2401, a processing unit or a processor 2403 for external communication, 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 acquire random access configuration information from the base station (the random access configuration information includes a random access configuration index and random access preamble subcarrier interval indication information) and randomly. 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 Memory 2405 to be included.

In an example embodiment, the UE 2400 queries the random access preamble transmission power corresponding to the obtained random access preamble format by querying a correspondence table including at least random access preamble formats and random access preamble transmission power offsets DELTA_PREAMBLE. The offset DELTA_PREAMBLE may be determined.

According to another exemplary embodiment, the correspondence table may further include at least one of random access preamble subcarrier interval indication information and a 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 and the random access preamble subcarrier interval indication information and the carrier range may be determined by querying a corresponding relationship 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. In addition, it is possible to improve the probability of success of the random access of the terminal in case of controlling the interference, significantly improve the performance of future wireless communication systems, and provide lower access delay and better access experience for the terminal. can do.

According to various embodiments of the present disclosure, the method may further include the following method or apparatus.

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

Preferably, performing the random access process with the terminal according to the random access configuration information transmitted by the terminal on the anchor subband carries a random access preamble sequence transmitted by the terminal on the uplink anchor subband. Receiving random access configuration information; Performing random access according to a random access preamble sequence and transmitting a random access response; Detecting message 3 in the uplink anchor subband; And transmitting a contention resolution in the downlink anchor subband.

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

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

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 in the uplink control channel and transmitting the downlink control information in the downlink control channel so that the terminal detects the downlink control information in the downlink control channel.

Advantageously, the frame structure further comprises a guard band and / or guard time, said method transmitting the configuration index of the guard band and guard time to provide protection according to the configuration index when the terminal performs data communication. It further comprises the step.

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

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

An uplink processing unit, configured to perform a random access process with the terminal according to the random access configuration information transmitted by the terminal on the anchor subband; And a communication unit configured to perform data communication with the terminal in the data transmission band.

In another embodiment, there is provided a frame structure applied to a communication method based on the frame structure, 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; The data transmission band is also 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, the present disclosure proposes a new method of 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 each designed. Based on this, the corresponding signaling is designed according to the indication of the different carrier ranges and subcarrier spacing sizes to indicate the preamble transmit power offsets. Finally, the UE determines the final random access preamble transmit power based on the transmit power offset and other related parameters.

In one embodiment, a method of determining a random access preamble transmit 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 the random access preamble transmission power offset corresponding to the obtained random access preamble format comprises: a correspondence table comprising at least random access preamble formats and random access preamble transmission power offsets; By querying, determining 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 a carrier range. The operation of determining the random access preamble transmission power offset corresponding to the obtained random access preamble format may be performed by querying a correspondence table to determine at least one of the obtained random access preamble format and the random access preamble subcarrier interval indication information and a carrier range. Determining a corresponding random access preamble transmit power offset.

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

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

Where DELTA_PREAMBLE represents a random access preamble transmission power offset, Msg1SCS represents a random access preamble subcarrier interval indication information, and 0, 1, 2, 3, A1, A2, A3, B1, B4, A1 / B1, A2 / B2 , A3 / B3, C0, and C2 indicate defined random access preamble formats, 15 kHz, 30 kHz, 60 kHz, and 120 kHz indicate random access preamble subcarrier intervals, and μ denotes a random access preamble subcarrier interval. Wherein 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 of determining random access preamble transmit power is provided. The method includes generating random access configuration information comprising a random access configuration index and random access preamble subcarrier interval indication information; And transmitting the random access configuration information to the UE.

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

In another embodiment, a UE is provided. The UE comprises a communication interface configured for communication; A processor; And when executed by the processor, causes the processor to obtain random access configuration information from the base station, the random access configuration index comprising the random access configuration index and the random access preamble subcarrier interval indication information, and to the random access configuration index and the random access preamble subcarrier interval indication information. A memory storing computer executable instructions to obtain a random access preamble format based upon the determination and to determine a random access preamble transmission power offset corresponding to the obtained random access preamble format.

In another embodiment, determining the random access preamble transmit power offset corresponding to the obtained random access preamble format may be performed by querying correspondence tables including at least random access preamble formats and random access preamble transmit power offsets. 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 a carrier range. The operation of determining the random access preamble transmission power offset corresponding to the obtained random access preamble format may be performed by querying a correspondence table to determine at least one of the obtained random access preamble format and the random access preamble subcarrier interval indication information and a carrier range. Determining a corresponding random access preamble transmit power offset.

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

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

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

In yet 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 as described above.

Computer-executable instructions or programs for implementing the functions of various embodiments of the present disclosure may be recorded in a computer readable storage medium. The corresponding function can be realized by the computer system reading the programs recorded on the recording medium and executing these programs. In the present specification, a so-called "computer system" may be a computer system embedded in a device, and may include an operating system or hardware (eg, a peripheral device). A "computer readable storage medium" can 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 readable by a computer.

Various features or functional modules of the devices used in the above-described embodiments may be implemented or performed by a circuit (eg, a single chip or a multi-chip integrated circuit). Circuitry designed to perform the functions described herein may be a general purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete Hardware components, or any combination thereof. A general purpose processor may be a microprocessor or a conventional 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 that replace 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 appreciate that the present invention includes apparatus related to 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 in general purpose computers. These devices store computer programs that are selectively activated or reconfigured. Such computer programs may be stored on a device (eg computer) readable medium or may be a floppy disk, hard disk, optical disk, CD-ROM and magneto-optical disk, read-only memory (ROM), random access (RAM) 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 (EPROM), flash memory, magnetic card, or write card. Can be stored on any type of medium suitable for storing the data and being coupled to the bus. In other words, a readable medium includes any medium that stores or transmits information in a form readable by an apparatus (eg, a computer).

Those skilled in the art can understand that each block of these structural diagrams and / or block diagrams and / or flowcharts, and combinations of these structural diagrams and / or block diagrams and / or flowcharts, may be implemented by computer program instructions. . Those skilled in the art can provide these computer program instructions to a processor of a general purpose computer, a specialized computer, or a processor for another programmable data processing method, and thus assigned to one or more blocks of the structure diagram and / or block diagram and / or flowchart. It is to be understood that the methods may be executed by a computer or a processor of the computer for other programmable data processing methods.

Those skilled in the art can appreciate that various operations, methods, steps, measurements, and methods discussed in this disclosure may be replaced, changed, combined, or deleted. In addition, other steps, measurements, and manners in the various operations, methods, and processes discussed in this disclosure may also be substituted, changed, rearranged, resolved, combined, or deleted. In addition, various operations, methods, steps, measurements, and methods of the prior art and those disclosed herein may also be substituted, altered, rearranged, resolved, combined, or deleted.

The foregoing descriptions are merely some of the embodiments of the present disclosure. It should be noted to those skilled in the art that numerous improvements and modifications may be made without departing from the principles of the present disclosure. Such improvements and modifications also fall within the protection scope of the present disclosure.

Those skilled in the art can understand that each block of the schematic and / or block diagrams and / or flowcharts, and combinations of blocks in the schematic and / or block diagrams and / or flowcharts, may be implemented by computer program instructions. Those skilled in the art may provide computer program instructions to a general purpose computer, a special purpose computer, or another processor capable of programming a data processing method for implementation, and accordingly one or more blocks of the schematic and / or block diagrams and / or flowcharts. It is to be understood that the designated ways may be implemented by a computer or other processor capable of programming a data processing method.

Here, each module of the device of the present disclosure may be integrated into one body or separately. The modules may be combined into one module and further divided into a plurality of submodules.

Those skilled in the art will appreciate that the accompanying drawings are only schematic diagrams of preferred embodiments, and that modules or processes in the accompanying drawings are not necessarily required to implement the present disclosure.

Those skilled in the art can understand that in embodiments the modules of the device may be distributed to the devices of the embodiments as described in the embodiments, and that corresponding changes may be made in one or more devices different from the embodiments. Modules in the above embodiments may be combined into one module or further divided into a plurality of sub modules.

The serial numbers of the present disclosure are for illustration only and do not represent the advantages and disadvantages of the embodiments.

The foregoing descriptions are merely specific embodiments of the present disclosure, and the present disclosure is not limited thereto, and all modifications that can be conceived by those skilled in the art should be included in the protection scope of the present disclosure.

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

If 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 the computer readable storage medium may be configured to be executed by one or more processors in the electronic device. At least one program may include instructions for causing 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), DVD (digital versatile disc) or other type of optical storage device or a magnetic cassette including a magnetic cassette. Alternatively, any or all combinations of some or all may form the memory in which the program is stored. In addition, a plurality of such memories may be included in the electronic device.

The programs may also be stored in an attached storage device accessible via a communication 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. Such storage devices can access electronic devices through external ports. In addition, a separate storage device on the communication network may access the portable electronic device.

In the above-described specific embodiments of the present disclosure, the components included in the present disclosure are expressed in the singular or plural, according to the specific embodiments presented. However, the singular form or the plural form is selected for convenience of description in accordance with a given situation, and the various embodiments of the present disclosure are not limited to a single element or a plurality of elements. In addition, a plurality of elements represented herein may be composed of a single element, a single element of the present specification may be composed of a plurality of 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 details may be made without departing from the scope of the present disclosure. Therefore, 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 in an illustrative embodiment, various changes and modifications may be suggested to one skilled in the art. This disclosure is intended to cover such changes and modifications as fall within the scope of the appended claims.

Claims (17)

A method of operating user equipment (UE) in a wireless communication system,
Detecting a synchronization signal block, performing a downlink synchronization process according to the detected synchronization signal block, and determining time-frequency resources of an anchor subband;
Obtaining random access configuration information according to the time-frequency resources of the anchor subband, performing a random access process according to the random access configuration information, and completing uplink synchronization;
Acquiring control information in a control channel band and performing data communication with a base station in a data transmission band according to the control information;
Way.
The method of claim 1,
Obtaining the random access configuration information,
Detecting a system information block in the anchor subband after a first preset time interval for detecting the synchronization signal block;
Obtaining random access configuration information carried in the detected system information block.
The method of claim 1,
Obtaining the random access configuration information,
Determining a location of the anchor subband according to a result of the downlink synchronization process, and obtaining a master information block carried by a broadcast channel in the synchronization signal block;
Obtaining random access configuration information carried in the master information block; Or determining a system information block according to the master information block and acquiring random access configuration information carried in the system information block.
Way.
The method of claim 1,
The process of performing the random access process,
Transmitting a random access preamble sequence to the base station through an uplink anchor subband according to the random access configuration information;
Detecting a random access response in the downlink anchor subband;
Transmitting message 3 in the uplink anchor subband when the random access response is detected;
Detecting contention resolution in the downlink anchor subband;
Way.
The method of claim 1,
The performing of the random access process according to the random access configuration information,
Transmitting a random access preamble sequence to the base station through an uplink anchor subband according to the random access configuration information;
Detecting control information of the uplink anchor subband used for transmitting the 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 and,
Transmitting a message 3 in an uplink data transmission band when a random access response including a preamble sequence identifier matching the transmitted random access preamble sequence is detected;
Detecting contention resolution in the downlink data transmission band;
Way.
The method of claim 1,
Acquiring the control information in the control channel band, and performing data communication with the base station in the data transmission band according to the control information,
Performing detection in a downlink control channel and receiving downlink data in a corresponding downlink data transmission band according to a resource allocation indication carried in the downlink control information when the downlink control information transmitted thereto is detected; and,
Transmits a scheduling request in an uplink control channel, performs detection in the downlink control channel after a second preset time interval, and is carried in the downlink control information when the downlink control information transmitted to the UE is detected; Allocating uplink data to a corresponding uplink data transmission band according to the uplink resource allocation indication,
Way.
A method of operating a base station (BS) in a wireless communication system,
Performing a random access process with the terminal according to the random access configuration information transmitted by the terminal through an anchor subband;
Performing data communication with the terminal in a data transmission band;
Way.
The method of claim 7, wherein
The process of performing a random access process with the terminal according to the random access configuration information transmitted by the terminal through the anchor subband,
Receiving the random access configuration information, carrying a random access preamble sequence transmitted by the terminal on an uplink anchor subband,
Performing random access according to the random access preamble sequence and transmitting a random access response;
Detecting message 3 in the uplink anchor subband;
Transmitting a contention resolution in the downlink anchor subband,
Way.
The method of claim 7, wherein
The process of performing data communication with the terminal in the data transmission band,
Transmitting downlink control information in a downlink control channel so that the terminal detects downlink control information in the downlink control channel;
Receiving a scheduling request in an uplink control channel and transmitting the downlink control information in the downlink control channel so that the terminal detects the downlink control information in the downlink control channel;
Way.
A method of operating user equipment (UE) in a wireless communication system,
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;
Determining a random access preamble transmission power offset corresponding to the obtained random access preamble format;
Way.
The method of claim 10,
The determining of the random access preamble transmission power offset corresponding to the obtained random access preamble format includes:
Determining the random access preamble transmit power offset corresponding to the obtained random access preamble format by querying a correspondence table comprising at least random access preamble formats and random access preamble transmit power offsets. doing,
Way.
A method of operating a base station (BS) in a wireless communication system,
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;
Transmitting the random access configuration information to a user equipment (UE),
Way.
The method of claim 12,
The random access configuration index and the 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. felled,
Way.
A user equipment (UE), configured to implement the method of claim 1.
A base station (BS) configured to implement the method of claim 7.
A user equipment (UE), configured to implement the method of claim 10.
A base station (BS) configured to implement the method of claim 12.

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