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WO2024055297A1 - Procédé d'accès aléatoire et appareil de communication - Google Patents

Procédé d'accès aléatoire et appareil de communication Download PDF

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Publication number
WO2024055297A1
WO2024055297A1 PCT/CN2022/119373 CN2022119373W WO2024055297A1 WO 2024055297 A1 WO2024055297 A1 WO 2024055297A1 CN 2022119373 W CN2022119373 W CN 2022119373W WO 2024055297 A1 WO2024055297 A1 WO 2024055297A1
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WIPO (PCT)
Prior art keywords
preamble sequence
preamble
beams
sequence type
random access
Prior art date
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PCT/CN2022/119373
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English (en)
Chinese (zh)
Inventor
魏帆
王磊
徐修强
孙港乐
方家琪
王闻今
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2022/119373 priority Critical patent/WO2024055297A1/fr
Priority to CN202280097633.1A priority patent/CN119452612A/zh
Publication of WO2024055297A1 publication Critical patent/WO2024055297A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems

Definitions

  • the present application relates to the field of communication technology, and in particular, to a random access method and communication device.
  • the access network equipment (such as the base station) generates different receiving beams in different beam scanning time slots within a beam scanning cycle, and the terminal equipment selects one of the beam scanning time slots to access the system.
  • the network equipment sends a preamble for scheduling-free random access, that is, the terminal equipment selects a beam and uses the beam to send a preamble to the access network equipment for scheduling-free random access.
  • the random access success rate of users in certain beam scanning time slots is low, that is, the random access success rate of users who use certain beams for random access is Low. Therefore, how to improve the success rate of random access for users is an issue that needs to be solved urgently.
  • Embodiments of the present application provide a random access method and a communication device, which are beneficial to improving the success rate of random access for users.
  • this application provides a random access method.
  • the method can be executed by a network device, or by a component of the network device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can realize all or part of the functions of the network device. .
  • the method includes:
  • the first beam in receives a random access message sent by the terminal device, the random access message includes a target preamble, the target preamble is generated based on the target preamble sequence, and the type of the target preamble sequence is the first preamble sequence type , the first preamble sequence type is the preamble sequence type corresponding to the first beam.
  • the preamble sequence types corresponding to different beams are not always the same.
  • the preamble sequence types corresponding to each beam can be flexibly configured according to the actual situation to improve the user random access success rate. For example, a preamble generated based on a ZC sequence can be sent to a beam with a small number of access users. For beams with a large number of access users, preambles generated based on PN sequences can be sent. Since the number of PN sequences is large, collisions of preambles of different users can be avoided, resulting in random access failures for users. For another example, a preamble generated based on a PN sequence can be sent to a beam with a smaller channel fading coefficient. For beams with large channel fading coefficients, preambles generated based on the ZC sequence can be sent. Since the ZC sequence has good orthogonality, it is beneficial to improve the success rate of user random access.
  • a specific implementation manner of determining the preamble sequence type corresponding to each beam in the plurality of beams is: determining the statistical distribution information of the channel fading coefficient corresponding to each beam in the plurality of beams and a plurality of The number of access users corresponding to each beam in the beam; based on the statistical distribution information of the channel fading coefficient corresponding to each beam in the multiple beams and the number of access users corresponding to each beam in the multiple beams, determine multiple The preamble sequence type corresponding to each beam in the beam.
  • the statistical distribution information of the channel fading coefficient corresponding to the beam and the number of access users can be integrated to flexibly determine the preamble sequence type corresponding to the beam, which is beneficial to improving the success rate of user random access.
  • each of the multiple beams is determined based on the statistical distribution information of the channel fading coefficient corresponding to each of the multiple beams and the number of access users corresponding to each of the multiple beams.
  • the specific implementation method of the preamble sequence type corresponding to the beam is: based on the statistical distribution information of the channel fading coefficient corresponding to the t-th beam and the number of access users, determine that the random access message received by the t-th beam includes different preamble sequence types
  • the signal-to-noise ratio when the preamble is used; based on the signal-to-noise ratio when the random access message received by the t-th beam includes preambles of different preamble sequence types, determine the preamble sequence type corresponding to the t-th beam, and the t-th A beam is any beam among multiple beams.
  • the preamble sequence type corresponding to the beam determined based on this possible implementation method is beneficial to improving the success rate of user random access.
  • the preamble sequence type corresponding to the t-th beam is the preamble sequence type corresponding to the preamble included in the random access message with a target signal-to-noise ratio
  • the target signal-to-noise ratio is the preamble sequence type corresponding to the t-th beam.
  • the signal-to-noise ratio is greater than the first threshold, or the target signal-to-noise ratio is the largest signal-to-noise ratio among the signal-to-noise ratios corresponding to the t-th beam.
  • the preamble sequence type corresponding to the beam determined based on this possible implementation method is beneficial to improving the success rate of user random access.
  • the signal-to-noise ratio when the random access message received by the t-th beam includes a preamble of the i-th preamble sequence type is SNR t ;
  • the index set of N t users is determined based on the number of access users corresponding to the t-th beam;
  • ⁇ n, n′ represents the cross-correlation coefficient between the n-th user and the n′-th user preamble;
  • x n′ indicates the preamble sequence of the i-th preamble sequence type of the n′-th user;
  • Z t is the signal received by
  • the signal-to-noise ratio when the random access message received by the t-th beam includes a preamble of the i-th preamble sequence type can be accurately determined.
  • the specific implementation method of determining the statistical distribution information of the channel fading coefficient corresponding to each beam in the multiple beams and the number of access users corresponding to each beam in the multiple beams is: determining the preset The arrival angle of the user signal within the time period and the channel fading coefficient on the path corresponding to the arrival angle; based on the arrival angle of the user signal within the preset time period and the channel fading coefficient on the path corresponding to the arrival angle, determine the angle of arrival within the preset time period Statistical distribution information and statistical distribution information of the channel fading coefficient within the preset time period; based on the statistical distribution information of the channel fading coefficient within the preset time period, determine the statistical distribution information of the channel fading coefficient corresponding to each beam in the multiple beams; Based on the statistical distribution information of the angle of arrival within the preset time period and the statistical distribution information of the channel fading coefficient within the preset time period, the number of access users corresponding to each beam in the plurality of beams is determined.
  • the statistical distribution information of the channel fading coefficient corresponding to each beam in the multiple beams and the number of access users corresponding to each beam in the multiple beams can be accurately determined.
  • second information may also be sent, and the second information is used to configure the preamble sequence used by the terminal device when generating the target preamble based on preamble sequences of different preamble sequence types.
  • the first information is also used to indicate the preamble time-frequency resource location corresponding to each beam in the plurality of beams.
  • the network device can indicate the time-frequency resource location of the preamble, thereby making the time-frequency resource location of the preamble more flexible.
  • the preamble sequence type includes a pseudo noise PN sequence type and a Zadyov-Zhu ZC sequence type.
  • this application provides a random access method.
  • the method can be executed by the terminal device, or by components of the terminal device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can realize all or part of the functions of the terminal device. .
  • the method includes: receiving first information, the first information being used to configure a preamble sequence type corresponding to each beam in the plurality of beams; sending a random access message through the first beam in the plurality of beams, and the random access message Including a target preamble, the target preamble is generated based on a target preamble sequence, the type of the target preamble sequence is a first preamble sequence type, and the first preamble sequence type is a preamble sequence type corresponding to the first beam.
  • different preamble sequence types correspond to different preamble sequence sets
  • the preamble sequence set includes one or more preamble sequences
  • the target preamble sequence is corresponding to the first preamble sequence type.
  • the network device does not need to notify the terminal device of the target preamble sequence through signaling, which is beneficial to saving transmission resources.
  • second information is received, and the second information is used to configure a preamble sequence used by the terminal device when generating a target preamble based on preamble sequences of different preamble sequence types.
  • the first information is also used to indicate the preamble time-frequency resource location corresponding to each beam in the plurality of beams.
  • the preamble sequence type includes a pseudo noise PN sequence type and a Zadyov-Zhu ZC sequence type.
  • the first beam is the beam with the highest received signal strength among the multiple beams.
  • beneficial effects of the second aspect can be referred to the beneficial effects of the first aspect, and will not be described in detail here.
  • the present application provides a communication device.
  • the communication device may be a network device or a terminal device, a device in a network device or a terminal device, or a device that can be used in conjunction with a network device or a terminal device.
  • the communication device may also be a chip system.
  • the communication device can perform the method described in the first aspect or the second aspect.
  • the functions of the communication device can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the unit or module may be software and/or hardware.
  • the operations and beneficial effects performed by the communication device may refer to the method and beneficial effects described in the first aspect or the second aspect.
  • the present application provides a communication device.
  • the communication device includes a processor.
  • the processor calls a computer program in a memory, the method described in the first or second aspect is executed.
  • this application provides a communication device.
  • the communication device includes a processor and a memory.
  • the processor and the memory are coupled; the processor is used to implement the method described in the first aspect or the second aspect.
  • the application provides a communication device.
  • the communication device includes a processor, a memory and a transceiver.
  • the processor and the memory are coupled; the transceiver is used to send and receive data, and the processor is used to implement the first aspect or the second aspect.
  • the application provides a chip.
  • the chip includes a processor and an interface.
  • the processor is coupled to the interface.
  • the interface is used to receive or output signals.
  • the processor is used to execute code instructions to enable the first aspect or The method described in the second aspect is executed.
  • the present application provides a computer-readable storage medium.
  • Computer programs or instructions are stored in the storage medium.
  • the method described in the first or second aspect is implemented. .
  • the present application provides a computer program product including instructions, which when a computer reads and executes the computer program product, causes the computer to perform the method described in the first or second aspect.
  • Figure 1 is a schematic diagram of a communication system provided by this application.
  • Figure 2 is a schematic diagram of generating a preamble provided by this application.
  • Figure 3 is a schematic flow chart of a random access method provided by this application.
  • Figure 4 is a schematic structural diagram of a communication device provided by this application.
  • FIG. 5 is a schematic structural diagram of another communication device provided by the present application.
  • Figure 6 is a schematic structural diagram of a chip provided by this application.
  • embodiments of the present application provide a random access method and a communication device.
  • system architecture of the embodiments of the present application is first described below:
  • FIG. 1 is an architectural schematic diagram of a communication system provided by an embodiment of the present application.
  • the solution in the present application may be applicable to this communication system.
  • the communication system may include network equipment and terminal equipment.
  • Figure 1 takes the communication system including one network equipment and two terminal equipment as an example. Of course, the number of network devices and terminal devices can also be greater, which is not limited in the embodiments of this application.
  • the network device in the embodiment of this application refers to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network, and can also be called a base station.
  • the wireless access network equipment can also be called: evolved node B (gNB), transmission reception point (TRP), evolved node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), etc.
  • gNB evolved node B
  • TRP transmission reception point
  • eNB evolved node B
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station
  • the network device can be a module or unit that completes some functions of the base station.
  • it can be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU).
  • the CU here completes the functions of the base station's radio resource control protocol and packet data convergence protocol (PDCP), and can also complete the functions of the service data adaptation protocol (SDAP);
  • SDAP service data adaptation protocol
  • DU completes the functions of the base station
  • the functions of the wireless link control layer and medium access control (MAC) layer can also complete some or all of the physical layer functions.
  • 3GPP 3rd generation partnership project
  • the network equipment can be a macro base station, a micro base station or an indoor station, or a relay node or a donor node, etc.
  • the device used to realize the function of the network device may be the network device itself, or it may be a device that can support the network device to realize the function, such as a chip system or a combined device or component that can realize the function of the network device.
  • the device Can be installed on network equipment.
  • the embodiments of this application do not limit the specific technology and specific equipment form used by the network equipment.
  • Terminal equipment includes equipment that provides voice and/or data connectivity to users.
  • terminal equipment is a device with wireless transceiver functions that can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on On the water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons, satellites, etc.).
  • the terminal may be a mobile phone, a tablet, a computer with wireless transceiver functions, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, or a wireless terminal in industrial control (industrial control) , vehicle-mounted terminal equipment, wireless terminals in self-driving (self-driving), vehicles, roadside equipment, aircraft, wireless terminals in remote medical (remote medical), wireless terminals in smart grid (smart grid), transportation security ( Wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wearable terminal devices, etc.
  • the embodiments of this application do not limit application scenarios.
  • the terminal can sometimes also be called terminal equipment, user equipment (UE), access terminal equipment, vehicle terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile Equipment, UE terminal equipment, terminal equipment, wireless communication equipment, UE agent or UE device, etc.
  • Terminals can also be fixed or mobile.
  • the device used to realize the function of the terminal device may be a terminal device, or may be a device capable of supporting the terminal device to realize the function, such as a chip system or a combined device or component that can realize the function of the terminal device.
  • the device Can be installed in terminal equipment.
  • Figure 2 shows the preamble generation process.
  • the preamble is generated based on the preamble sequence p 0 p 1 p 2 ...p L-1 of length L.
  • the terminal equipment first performs discrete Fourier transform (DFT) precoding on the preamble sequence p 0 p 1 p 2 ...p L-1 to obtain the frequency domain preamble sequence, and then converts the frequency domain
  • DFT discrete Fourier transform
  • the domain preamble sequence is input into an orthogonal frequency division multiplexing (OFDM) modulator for OFDM modulation.
  • OFDM orthogonal frequency division multiplexing
  • the output of the OFDM modulator is repeated N times, and then a cyclic prefix (CP) is inserted into the OFDM output sequence to obtain the preamble.
  • OFDM orthogonal frequency division multiplexing
  • the new radio access technology (new radio access technology, NR) system defines two different types of preambles, namely long preambles and short preambles.
  • Table 1 there are four formats of long preamble, each format corresponding to a specific parameter set, a specific number of output repetitions of the OFDM modulator, and a specific length of cyclic prefix.
  • the subcarrier spacing used is consistent with the NR conventional subcarrier spacing, that is, the frequency range 1 (FR1) scenario below 6GHz is 15kHz or 30kHz, and the higher frequency band Frequency Range 2 (FR2) scenario is 60kHz or 120kHz.
  • FR1 frequency range 1
  • FR2 Frequency Range 2
  • Table 2 the short preamble has 9 formats, and each format corresponds to a specific number of output repetitions of the OFDM modulator and a specific length of cyclic prefix.
  • Figure 3 is a schematic flow chart of a random access method provided by an embodiment of the present application.
  • network equipment and terminal equipment are used as the execution subjects of this method as an example.
  • This application does not limit the execution subjects of this method.
  • the execution subject in Figure 3 can also be a chip, chip system, or processor that supports the network device or terminal device to implement the method, or it can also be a logic module or software that can realize all or part of the functions of the network device or terminal device. . in:
  • the network device determines the preamble sequence type corresponding to each beam in the multiple beams.
  • the multiple beams in step 301 are all beams generated within one beam scanning period.
  • One beam scanning cycle has multiple beam scanning time units, and each beam scanning time unit generates a beam. Determining the preamble sequence type corresponding to each beam in the plurality of beams can also be understood as determining the preamble sequence type corresponding to each beam scanning time unit within a beam scanning period. That is, the beam in the application embodiment can also be replaced by a beam scanning time unit.
  • the preamble sequence types corresponding to different beams determined by the network device may be the same or different.
  • the preamble sequence type includes a pseudo-noise (PN) sequence type and a Zadoff-Chu (zadoff-chu, ZC) sequence type.
  • the preamble sequence type may also include other sequence types, which is not limited in the embodiment of this application.
  • the network device determines that beam 1 to beam 3 all correspond to the PN sequence type.
  • the network device determines that the preamble sequence type corresponding to beam 1 is a PN sequence type, the preamble sequence type corresponding to beam 2 is a ZC sequence type, and the preamble sequence type corresponding to beam 3 is a PN sequence type.
  • Each beam has a corresponding relationship with the preamble sequence type.
  • the specific implementation method for the network device to determine the preamble sequence type corresponding to each beam in the multiple beams is: determining the statistical distribution information of the channel fading coefficient corresponding to each beam in the multiple beams; The number of access users corresponding to each beam in the plurality of beams; the statistical distribution information of the channel fading coefficient corresponding to each beam in the plurality of beams and the access users corresponding to each beam in the plurality of beams quantity to determine the preamble sequence type corresponding to each beam in the plurality of beams.
  • the statistical distribution information of the channel fading coefficient corresponding to the beam and the number of access users can be integrated to flexibly determine the preamble sequence type corresponding to the beam, which is beneficial to improving the success rate of user random access.
  • the statistical distribution information of the channel fading coefficient corresponding to the beam can be understood as the statistical distribution information of the channel fading coefficient used for transmission using the beam.
  • the channel fading coefficient is an element in the channel matrix
  • the statistical distribution information of the channel fading coefficient can be a probability distribution of the channel fading coefficient.
  • the number of access users corresponding to a beam refers to the number of users using this beam for random access.
  • the network device can determine the preamble sequence type corresponding to beam 1 based on the statistical distribution information of the channel fading coefficient corresponding to beam 1 and the number of access users corresponding to beam 1.
  • the network device may determine the preamble sequence type corresponding to beam 2 based on the statistical distribution information of the channel fading coefficient corresponding to beam 2 and the number of access users corresponding to beam 2.
  • the network device can determine the preamble sequence type corresponding to beam 3 based on the statistical distribution information of the channel fading coefficient corresponding to beam 3 and the number of access users corresponding to beam 3.
  • the network device may not determine the preamble sequence type corresponding to the beam based on the statistical distribution information of the channel fading coefficient corresponding to the beam and the number of access users.
  • the network device may flexibly determine based on other parameters.
  • the type of preamble sequence corresponding to the beam is not limited in the embodiment of this application.
  • the network device determines the plurality of channel fading coefficients based on statistical distribution information of channel fading coefficients corresponding to each beam in the plurality of beams and the number of access users corresponding to each beam in the plurality of beams.
  • the specific implementation method of the preamble sequence type corresponding to each beam in the beam is: based on the statistical distribution information of the channel fading coefficient corresponding to the t-th beam and the number of access users, it is determined that the random access message received by the t-th beam includes: The signal-to-noise ratio when using preambles of different preamble sequence types; based on the signal-to-noise ratio when the random access message received by the t-th beam includes preambles of different preamble sequence types, determine the preamble sequence corresponding to the t-th beam Type, the t-th beam is any beam among multiple beams.
  • the preamble sequence type corresponding to the beam determined based on this possible implementation method is beneficial to improving the success rate of user random access.
  • the preamble sequence type includes a PN sequence type and a ZC sequence type. It has three beams, namely beam 1 to beam 3.
  • the network device can determine the signal-to-noise ratio 11 for beam 1 to receive the first random access message based on the statistical distribution information of the channel fading coefficient corresponding to beam 1 and the number of access users corresponding to beam 1, and determine the signal-to-noise ratio 11 for beam 1 to receive the first random access message.
  • the signal-to-noise ratio of two random access messages is 12.
  • the first random access message includes a preamble generated based on a preamble sequence of the PN sequence type.
  • the second random access message includes a preamble generated based on a preamble sequence of the ZC sequence type.
  • the network device determines the preamble sequence type corresponding to beam 1 based on the signal-to-noise ratio 11 and the signal-to-noise ratio 12.
  • the method of determining the preamble sequence type corresponding to other beams is the same as the method of determining the preamble sequence type corresponding to beam 1, and will not be described again here.
  • the preamble sequence type corresponding to the t-th beam is the preamble sequence type corresponding to the preamble included in the random access message with a target signal-to-noise ratio
  • the target signal-to-noise ratio is the preamble sequence type corresponding to the t-th beam.
  • the signal-to-noise ratio is greater than the first threshold, or the target signal-to-noise ratio is the largest signal-to-noise ratio among the signal-to-noise ratios corresponding to the t-th beam.
  • the preamble sequence type corresponding to the beam determined based on this possible implementation method is beneficial to improving the success rate of user random access.
  • the network device determines that beam 1 corresponds to the PN sequence type.
  • the network device determines that beam 1 corresponds to the PN sequence type.
  • the signal-to-noise ratio when the random access message received by the t-th beam includes a preamble of the i-th preamble sequence type is SNR t ;
  • the index set of N t users is determined based on the number of access users corresponding to the t-th beam;
  • ⁇ n, n′ represents the cross-correlation coefficient between the n-th user and the n′-th user preamble;
  • represents the hybrid beamforming matrix of the tth beam Represents the channel corresponding vector of the n-th user for the t-th beam;
  • x n′ indicates the preamble sequence of the i-th preamble sequence type of the n′-th user;
  • Z t is the signal received by the t-
  • the specific implementation manner in which the network device determines the statistical distribution information of the channel fading coefficient corresponding to each beam in the plurality of beams and the number of access users corresponding to each beam in the plurality of beams is as follows : The network device determines the angle of arrival of the user signal within the preset time period and the channel fading coefficient on the path corresponding to the angle of arrival; the network device determines the angle of arrival of the user signal within the preset time period and the channel on the path corresponding to the angle of arrival.
  • the fading coefficient determines the statistical distribution information of the angle of arrival within the preset time period and the statistical distribution information of the channel fading coefficient within the preset time period; the network device is based on the statistical distribution information of the channel fading coefficient within the preset time period. , determine the statistical distribution information of the channel fading coefficient corresponding to each beam in the plurality of beams; the network device is based on the statistical distribution information of the angle of arrival within the preset time period and the statistical distribution of the channel fading coefficient within the preset time period.
  • Information to determine the number of access users corresponding to each beam in multiple beams Based on this possible implementation, the statistical distribution information of the channel fading coefficient corresponding to each beam in the multiple beams and the number of access users corresponding to each beam in the multiple beams can be accurately determined.
  • the preset time period may be one beam scanning period or multiple beam scanning periods.
  • the specific implementation method for the network device to determine the angle of arrival of each user signal in the t-th beam scanning time unit and the channel fading coefficient on the path corresponding to the arrival angle may be: the uplink received by the network device in the t-th beam scanning time unit road signal in is the hybrid beamforming matrix corresponding to the tth beam scanning time unit, is the channel matrix of N t users in the t-th beam scanning time unit, is a transmit signal matrix composed of N t user preambles; the network equipment uses the multi-signal classification (MUSIC) algorithm to estimate the transmission time within the t-th beam scanning time unit based on the uplink signal received in the t-th beam scanning time unit.
  • MUSIC multi-signal classification
  • the arrival angle of each user signal, and the fading coefficient on the path corresponding to the arrival angle Based on the angle of arrival of each user signal within a beam scanning period and the channel fading coefficient on the path corresponding to the arrival angle, the network device determines the statistical distribution information of the angle of arrival and the statistical distribution information of the channel fading coefficient within a beam scanning period. The network device determines the statistical distribution information of the channel fading coefficient corresponding to each beam in the plurality of beams based on the statistical distribution information of the channel fading coefficient within a beam scanning period. The network device determines the number of access users corresponding to each beam in the multiple beams based on the statistical distribution information of the angle of arrival and the statistical distribution information of the channel fading coefficient within a beam scanning period.
  • the network device sends first information to the terminal device, where the first information is used to configure the preamble sequence type corresponding to each beam in the plurality of beams.
  • the terminal device can receive the first information.
  • the network device may send the first information to one or more terminal devices.
  • the first information may be carried in a broadcast channel.
  • the terminal device sends a random access message through the first beam among the plurality of beams.
  • the random access message includes a target preamble, the target preamble is generated based on the target preamble sequence, and the type of the target preamble sequence is the first Preamble sequence type, the first preamble sequence type is the preamble sequence type corresponding to the first beam.
  • the network device may receive the random access message through the first beam.
  • the terminal device after receiving the first information, selects a first beam from multiple beams to send a random access message. Since the first beam corresponds to the first preamble sequence type, the terminal device selects a target preamble sequence from a plurality of preamble sequences belonging to the first preamble sequence type, and uses the target preamble sequence to generate the target preamble. The terminal device sends a random access message including the target preamble through the first beam.
  • the target preamble can be a long preamble or a short preamble.
  • the first beam may be the beam with the highest received signal strength among the multiple beams. That is, the terminal device can measure the received signal strength of each beam in multiple beams, and select the beam with the highest received signal strength from the multiple beams as the first beam.
  • the first information is also used to indicate the preamble time-frequency resource location corresponding to each beam in the plurality of beams.
  • the target preamble is carried in the preamble time-frequency resource position corresponding to the first beam.
  • the network device can indicate the time-frequency resource location of the preamble, thereby making the time-frequency resource location of the preamble more flexible.
  • Method 1 Different preamble sequence types correspond to different preamble sequence sets.
  • the preamble sequence set includes one or more preamble sequences.
  • the target preamble sequence is a preamble sequence set corresponding to the first preamble sequence type. a randomly selected sequence. Based on this possible implementation, the network device does not need to notify the terminal device of the target preamble sequence through signaling, which is beneficial to saving transmission resources.
  • the preamble sequence type includes a PN sequence type and a ZC sequence type.
  • the PN sequence type corresponds to preamble sequence set 1
  • the ZC sequence type corresponds to preamble sequence set 2.
  • Preamble sequence set 1 includes preambles of multiple PN sequence types.
  • the preamble sequence set 2 includes preambles of multiple ZC sequence types.
  • the terminal device can randomly select a preamble sequence from the preamble sequence set 1, generate a target preamble based on the preamble sequence, and then transmit the target preamble through the first beam. Random access messages.
  • the network device may also send second information to the terminal device.
  • the second information is used to configure the preamble sequence used by the terminal device when generating a target preamble based on preamble sequences of different preamble sequence types.
  • the terminal device can receive the second information. Based on the second method, it is beneficial to prevent the target preambles sent by different users using the first beam from colliding.
  • the preamble sequence type includes a PN sequence type and a ZC sequence type.
  • the network device may send second information to the terminal device in advance. The second information indicates that when generating the target preamble based on the preamble sequence of the PN sequence type, use the preamble sequence 1 to generate the target preamble, and generate the target preamble based on the ZC sequence type.
  • preamble sequence 2 is used to generate the target preamble. If the first preamble sequence type corresponding to the first beam is a PN sequence type, the terminal device uses preamble sequence 1 to generate the target preamble. If the first preamble sequence type corresponding to the first beam is the ZC sequence type, the terminal device uses preamble sequence 2 to generate the target preamble.
  • the preamble sequence types corresponding to different beams are not always the same.
  • the preamble sequence types corresponding to each beam can be flexibly configured according to the actual situation to improve the user random access success rate. For example, a preamble generated based on a ZC sequence can be sent to a beam with a small number of access users. For beams with a large number of access users, preambles generated based on PN sequences can be sent. Since the number of PN sequences is large, collisions of preambles of different users can be avoided, resulting in random access failures for users.
  • a preamble generated based on a PN sequence can be sent to a beam with a smaller channel fading coefficient.
  • preambles generated based on the ZC sequence can be sent. Since the ZC sequence has good orthogonality, it is beneficial to improve the success rate of user random access.
  • FIG. 4 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in Figure 4 can be used to perform some or all functions of the network device in the above method embodiment.
  • the device may be a network device, a device in the network device, or a device that can be used in conjunction with the network device.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 4 may include a communication unit 401 and a processing unit 402. Among them, the processing unit 402 is used for data processing.
  • the communication unit 401 integrates a receiving unit and a sending unit.
  • the communication unit 401 may also be called a transceiver unit. Alternatively, the communication unit 401 can also be split into a receiving unit and a sending unit. in:
  • the processing unit 402 is configured to determine the preamble sequence type corresponding to each beam in the plurality of beams;
  • Communication unit 401 configured to send first information to the terminal device, where the first information is used to configure the preamble sequence type corresponding to each beam in the plurality of beams;
  • the communication unit 401 is also configured to receive a random access message sent by the terminal device through the first beam among the plurality of beams.
  • the random access message includes a target preamble, the target preamble is generated based on the target preamble sequence, and the target preamble
  • the type of the code sequence is a first preamble sequence type, and the first preamble sequence type is a preamble sequence type corresponding to the first beam.
  • the processing unit 402 determines the preamble sequence type corresponding to each beam in the plurality of beams by: determining the statistical distribution information of the channel fading coefficient corresponding to each beam in the plurality of beams; The number of access users corresponding to each beam in the multiple beams; based on the statistical distribution information of the channel fading coefficient corresponding to each beam in the multiple beams and the number of access users corresponding to each beam in the multiple beams, determined The preamble sequence type corresponding to each beam in the plurality of beams.
  • the processing unit 402 determines the number of access users in the multiple beams based on the statistical distribution information of the channel fading coefficient corresponding to each beam in the multiple beams and the number of access users corresponding to each beam in the multiple beams.
  • the specific method of determining the preamble sequence type corresponding to each beam is: based on the statistical distribution information of the channel fading coefficient corresponding to the t-th beam and the number of access users, determine that the random access message received by the t-th beam includes different preambles
  • the preamble sequence type corresponding to the t-th beam is the preamble sequence type corresponding to the preamble included in the random access message with a target signal-to-noise ratio
  • the target signal-to-noise ratio is the preamble sequence type corresponding to the t-th beam.
  • the signal-to-noise ratio is greater than the first threshold, or the target signal-to-noise ratio is the largest signal-to-noise ratio among the signal-to-noise ratios corresponding to the t-th beam.
  • the signal-to-noise ratio when the random access message received by the t-th beam includes a preamble of the i-th preamble sequence type is SNR t ;
  • the index set of N t users is determined based on the number of access users corresponding to the t-th beam;
  • ⁇ n, n′ represents the cross-correlation coefficient between the n-th user and the n′-th user preamble;
  • x n′ indicates the preamble sequence of the i-th preamble sequence type of the n′-th user;
  • Z t is the signal received by
  • the processing unit 402 determines the statistical distribution information of the channel fading coefficient corresponding to each beam in the plurality of beams and the number of access users corresponding to each beam in the plurality of beams in a specific manner: determining The arrival angle of the user signal within the preset time period and the channel fading coefficient on the path corresponding to the arrival angle; based on the arrival angle of the user signal within the preset time period and the channel fading coefficient on the path corresponding to the arrival angle, determine the arrival time within the preset time period The statistical distribution information of the angle and the statistical distribution information of the channel fading coefficient within the preset time period; based on the statistical distribution information of the channel fading coefficient within the preset time period, determine the statistical distribution of the channel fading coefficient corresponding to each beam in the multiple beams Information; determine the number of access users corresponding to each beam in the multiple beams based on the statistical distribution information of the angle of arrival within the preset time period and the statistical distribution information of the channel fading coefficient within the preset time period.
  • the communication unit 401 is also configured to send second information, which is used to configure the preamble sequence used by the terminal device to generate the target preamble based on preamble sequences of different preamble sequence types. .
  • the first information is also used to indicate the preamble time-frequency resource location corresponding to each beam in the plurality of beams.
  • the preamble sequence type includes a pseudo noise PN sequence type and a Zadyov-Zhu ZC sequence type.
  • FIG. 4 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in Figure 4 can be used to perform some or all functions of the terminal device in the above method embodiment.
  • the device may be a terminal device, a device in the terminal device, or a device that can be used in conjunction with the terminal device.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 4 may include a communication unit 401 and a processing unit 402. Among them, the processing unit 402 is used for data processing.
  • the communication unit 401 integrates a receiving unit and a sending unit.
  • the communication unit 401 may also be called a transceiver unit. Alternatively, the communication unit 401 can also be split into a receiving unit and a sending unit. in:
  • Communication unit 401 configured to receive first information, the first information being used to configure the preamble sequence type corresponding to each beam in the plurality of beams;
  • the communication unit 401 is also configured to send a random access message through the first beam among the plurality of beams.
  • the random access message includes a target preamble, the target preamble is generated based on the target preamble sequence, and the type of the target preamble sequence is is a first preamble sequence type, and the first preamble sequence type is the preamble sequence type corresponding to the first beam.
  • different preamble sequence types correspond to different preamble sequence sets
  • the preamble sequence set includes one or more preamble sequences
  • the target preamble sequence is the one corresponding to the first preamble sequence type.
  • the communication unit 401 is also configured to receive second information, which is used to configure the preamble sequence used by the terminal device to generate the target preamble based on preamble sequences of different preamble sequence types. .
  • the first information is also used to indicate the preamble time-frequency resource location corresponding to each beam in the plurality of beams.
  • the preamble code sequence type includes a pseudo noise PN sequence type and a Zadov-ZC sequence type.
  • the first beam is the beam with the highest received signal strength among the multiple beams.
  • FIG. 5 shows a schematic structural diagram of a communication device.
  • the communication device 500 may be the network device or terminal device in the above method embodiment, or may be a chip, chip system, or processor that supports the network device or terminal device to implement the above method.
  • the communication device can be used to implement the method described in the above method embodiment. For details, please refer to the description in the above method embodiment.
  • the communication device 500 may include one or more processors 501 .
  • the processor 501 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data.
  • the central processor can be used to control communication devices (such as base stations, baseband chips, terminals, terminal chips, DU or CU, etc.), execute software programs, and process Software program data.
  • the communication device 500 may include one or more memories 502, on which instructions 504 may be stored, and the instructions may be executed on the processor 501, so that the communication device 500 executes the above method. Methods described in the Examples.
  • the memory 502 may also store data.
  • the processor 501 and the memory 502 can be provided separately or integrated together.
  • the communication device 500 may also include a transceiver 505 and an antenna 506.
  • the transceiver 505 may be called a transceiver unit, a transceiver, a transceiver circuit, etc., and is used to implement transceiver functions.
  • the transceiver 505 may include a receiver and a transmitter.
  • the receiver may be called a receiver or a receiving circuit, etc., used to implement the receiving function;
  • the transmitter may be called a transmitter, a transmitting circuit, etc., used to implement the transmitting function.
  • the processing unit 402 shown in FIG. 4 may be the processor 501.
  • the communication unit 401 may be a transceiver 505.
  • the processor 501 may include a transceiver for implementing receiving and transmitting functions.
  • the transceiver may be a transceiver circuit, an interface, or an interface circuit.
  • the transceiver circuits, interfaces or interface circuits used to implement the receiving and transmitting functions can be separate or integrated together.
  • the above-mentioned transceiver circuit, interface or interface circuit can be used for reading and writing codes/data, or the above-mentioned transceiver circuit, interface or interface circuit can be used for signal transmission or transfer.
  • the processor 501 can store instructions 503, and the instructions 503 are run on the processor 501, which can cause the communication device 500 to execute the method described in the above method embodiment.
  • the instructions 503 may be fixed in the processor 501, in which case the processor 501 may be implemented by hardware.
  • the communication device 500 may include a circuit, and the circuit may implement the sending or receiving or communication functions in the foregoing method embodiments.
  • the processor and transceiver described in the embodiments of this application can be implemented in integrated circuits (ICs), analog ICs, radio frequency integrated circuits RFICs, mixed signal ICs, application specific integrated circuits (ASICs), and printed circuits. on printed circuit board (PCB), electronic equipment, etc.
  • the processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), n-type metal oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (Bipolar Junction Transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS complementary metal oxide semiconductor
  • NMOS n-type metal oxide-semiconductor
  • PMOS P-type Metal oxide semiconductor
  • BJT bipolar junction transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • the communication device described in the above embodiments may be a network device or a terminal device, but the scope of the communication device described in the embodiments of the present application is not limited thereto, and the structure of the communication device may not be limited by FIG. 5 .
  • the communication device may be a stand-alone device or may be part of a larger device.
  • the communication device may be:
  • the IC collection may also include a storage component for storing data and instructions;
  • the communication device may be a chip or a chip system
  • the chip 600 shown in FIG. 6 includes a processor 601 and an interface 602.
  • a memory 603 may also be included.
  • the number of processors 601 may be one or more, and the number of interfaces 602 may be multiple.
  • the interface 602 is used to receive or output signals
  • the processor 601 is used to perform data processing operations on network equipment or terminal equipment.
  • the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capabilities.
  • each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA), or other available processors.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • programmed logic devices discrete gate or transistor logic devices, discrete hardware components.
  • non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • RAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • This application also provides a computer-readable medium.
  • Computer programs or instructions are stored in the storage medium.
  • the computer program or instructions are executed by the communication device, the functions of any of the above method embodiments are realized.
  • This application also provides a computer program product including instructions.
  • the computer reads and executes the computer program product, the computer implements the functions of any of the above method embodiments.
  • the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated.
  • the usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVD)), or semiconductor media (e.g., solid state disks, SSD)) etc.
  • magnetic media e.g., floppy disks, hard disks, magnetic tapes
  • optical media e.g., high-density digital video discs (DVD)
  • DVD digital video discs
  • semiconductor media e.g., solid state disks, SSD

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé d'accès aléatoire et un appareil de communication. Le procédé consiste à : déterminer un type de séquence de préambule correspondant à chaque faisceau d'une pluralité de faisceaux ; envoyer des premières informations à un dispositif terminal, les premières informations étant utilisées pour configurer le type de séquence de préambule correspondant à chacun de la pluralité de faisceaux ; au moyen d'un premier faisceau parmi la pluralité de faisceaux, recevoir un message d'accès aléatoire envoyé par le dispositif terminal, le message d'accès aléatoire comprenant un préambule cible, le préambule cible étant généré sur la base d'une séquence de préambule cible, le type de la séquence de préambule cible étant un premier type de séquence de préambule, et le premier type de séquence de préambule étant un type de séquence de préambule correspondant au premier faisceau. Sur la base du procédé et de l'appareil fournis par la présente demande, le taux de réussite d'accès aléatoire d'utilisateurs peut être amélioré.
PCT/CN2022/119373 2022-09-16 2022-09-16 Procédé d'accès aléatoire et appareil de communication Ceased WO2024055297A1 (fr)

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CN202280097633.1A CN119452612A (zh) 2022-09-16 2022-09-16 一种随机接入方法及通信装置

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