WO2018205428A1 - 一种初始接入方法及设备 - Google Patents

一种初始接入方法及设备 Download PDF

Info

Publication number
WO2018205428A1
WO2018205428A1 PCT/CN2017/095310 CN2017095310W WO2018205428A1 WO 2018205428 A1 WO2018205428 A1 WO 2018205428A1 CN 2017095310 W CN2017095310 W CN 2017095310W WO 2018205428 A1 WO2018205428 A1 WO 2018205428A1
Authority
WO
WIPO (PCT)
Prior art keywords
random access
terminal device
synchronization signal
access preamble
signal block
Prior art date
Application number
PCT/CN2017/095310
Other languages
English (en)
French (fr)
Other versions
WO2018205428A9 (zh
Inventor
徐凯
庄宏成
Original Assignee
华为技术有限公司
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.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201780040938.8A priority Critical patent/CN109417804B/zh
Publication of WO2018205428A1 publication Critical patent/WO2018205428A1/zh
Publication of WO2018205428A9 publication Critical patent/WO2018205428A9/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications technologies, and in particular, to an initial access method and device.
  • the terminal device sends the uplink message in the initial access process to the network device multiple times.
  • the uplink message in the initial access process may be a random access preamble and scheduling. Transfer messages (message 3) and so on.
  • the terminal device During the initial access process of the existing terminal device, each time the terminal device sends an uplink message in the initial access process to the network device, the terminal device sends the initial access process to the network device on the uplink beam in one direction.
  • the uplink message so the network device needs to receive the uplink message in the initial access process sent by the terminal device by using beam scanning every time. That is, the network device needs to detect whether there is an uplink message in the initial access process sent by the terminal device in the uplink beam in each direction, and the network device detects the initial access process sent by the terminal device on the uplink beam in one direction.
  • the network device receives the uplink message in the initial access process sent by the terminal device on the uplink beam in the direction.
  • the network device needs to receive the uplink message sent by the terminal device multiple times during the initial access process of the terminal device, and the network device needs to perform beam scanning every time before receiving the uplink message in the initial access process sent by the terminal device, each time beam scanning
  • the process of the terminal device may take a long time to receive the uplink message sent by the terminal device in the initial access process of the terminal device, which may result in a longer initial access process of the terminal device.
  • An embodiment of the present invention provides an initial access method and a device, which are used to solve the problem that the initial access process of the terminal device exists in the existing technical solution of the initial access of the terminal device.
  • an embodiment of the present application provides an initial access method, including:
  • the terminal device sends a random access preamble to the network device on multiple uplink beams, and the network device receives the random access received on the multiple uplink beams after receiving the random access preamble sent by the terminal device on the multiple uplink beams.
  • the random access preamble with the best signal quality is selected in the preamble, and the uplink beam of the random access preamble with the best signal quality is determined by the network device as the best uplink beam of the terminal device.
  • the best uplink beam is used by the terminal device to send other uplink messages in the initial access process to the network device on the optimal uplink beam.
  • the plurality of uplink beams have different beam directions, so that the terminal device sends the random access preamble to the network device in different beam directions.
  • the terminal device sends the first uplink message in the initial access process to the network device, that is, the random access preamble, and the network device transmits the terminal device on multiple uplink beams.
  • Random access After the preamble is input, the uplink beam of the random access preamble with the best signal quality can be selected from the multiple uplink beams, and the uplink beam is determined as the best uplink beam, so that the terminal device can be The best uplink beam transmits a subsequent uplink message in the initial access process to the network device.
  • the foregoing method can avoid the problem that the network device needs to perform beam scanning before receiving the uplink message in the initial access process, which helps reduce the initial reception of the network device each time.
  • the time consumed by the process of the uplink message in the access process can reduce the time of the initial access process of the terminal device, thereby reducing the delay of the initial access process of the terminal device.
  • the network device searches for the synchronization signal block time index carried by the multiple synchronization signal blocks on different downlink beams.
  • the terminal device transmits a plurality of synchronization signal blocks, wherein the synchronization signal block time index is used to indicate a time sequence in which the synchronization signal blocks carrying the synchronization signal block time index are transmitted in the plurality of synchronization signal blocks.
  • the terminal device may receive one synchronization signal block of the plurality of synchronization signal blocks sent by the network device to the terminal device on different downlink beams, where the synchronization signal block may be a synchronization signal block received by the terminal device for the first time, and then matched by a preset. Determining, by the correspondence between the synchronization signal block time index and the random access preamble, a random access preamble corresponding to the synchronization signal block time index of the received synchronization signal block, where the determined random access preamble is the terminal device in multiple uplinks A random access preamble transmitted on the beam to the network device.
  • the network device may determine the received random access preamble by matching the correspondence between the preset synchronization signal block time index and the random access preamble.
  • the terminal device may determine, according to the received synchronization signal block, a random access preamble sent by the terminal device on multiple uplink beams, so that the network device may according to the received random access preamble and the preset synchronization signal.
  • the corresponding relationship between the block time index and the random access preamble is used to determine an optimal downlink beam, so that the network device can send subsequent downlink messages in the initial access process to the terminal device on the optimal downlink beam.
  • this implementation can reduce the time consumed by the terminal device to receive subsequent downlink messages in the initial access process, thereby further reducing the initial access process of the terminal device. time.
  • the synchronization signal block includes a primary synchronization signal, a secondary synchronization signal, a reference signal, and a physical broadcast channel (PBCH), and the synchronization signal block time index may be carried in the PBCH.
  • the reference signal includes, but is not limited to, a demodulation reference signal (DMRS).
  • DMRS demodulation reference signal
  • a partial bit included in a bit sequence for indicating a synchronization signal block time index may be carried in the PBCH, and other partial bits included in the bit sequence are carried in other portions included in the synchronization signal block, the synchronization Other portions included in the signal block include, but are not limited to, DMRS included in the sync signal block, which refers to bits in the bit sequence other than the portion of the bits carried by the PBCH.
  • the correspondence between the synchronization signal block time index and the random access preamble may be preset in one of two ways:
  • the first type at least one synchronization signal block time index is in one-to-one correspondence with at least one random access preamble.
  • At least one synchronization signal block time index is in one-to-one correspondence with at least one random access preamble group, and each random access preamble group includes a plurality of random access preambles.
  • the network device after receiving the random access preamble sent by the terminal device on the multiple uplink beams, the network device sends a random access response message to the terminal device, where the random access response message includes The information of the best uplink beam.
  • the terminal device can receive the random access response message sent by the network device, so that the terminal device can send subsequent uplink messages in the initial access process to the network device on the optimal uplink beam.
  • the information for indicating the optimal uplink beam of the terminal device includes, but is not limited to, one or a combination of the following information: a time slot resource used by the terminal device to transmit a random access preamble on the best uplink beam, The sub-band resource used by the terminal device to transmit the random access preamble on the best uplink beam, and the identifier of the best uplink beam.
  • the terminal device sends a random access preamble to the network device by using different resources on multiple uplink beams, and the network device may receive the random transmission of the terminal device by using different resources on multiple uplink beams.
  • Accessing the preamble, different resources include different time domain resources and/or different frequency domain resources.
  • the time domain resource includes, but is not limited to, a time slot resource, a time domain symbol, and the like
  • the frequency domain resource includes, but is not limited to, a subband resource, a frequency point resource, and the like.
  • a subband resource may include a plurality of physical resource blocks (PRBs).
  • the network device may use the terminal device to send the random access preamble on the best uplink beam.
  • the resource serves as information for indicating the best upstream beam.
  • the network device before the network device receives the random access preamble that is sent by the terminal device on the multiple uplink beams by using the different resources, the network device sends the resource configuration information to the terminal device, where the terminal device can receive the resource sent by the network device.
  • the configuration information is configured, so that the terminal device can configure, according to the resource configuration information, a resource that is used when sending the random access preamble on the multiple uplink beams, where the resource configuration information is used to indicate that the terminal device sends the random access preamble on multiple uplink beams. Different resources used in the code.
  • the terminal device pre-configures the resource configuration information before the terminal device sends the random access preamble to the network device by using the different resources on the multiple uplink beams.
  • the terminal device may configure resources used when transmitting the random access preamble on multiple uplink beams, so that the terminal device uses different resources to send the random access preamble to the network device on multiple uplink beams.
  • the network device sends the carrier configuration information to the terminal device, where the terminal device receives the carrier configuration information that is sent by the network device, where the carrier configuration information is used to indicate that the terminal device sends the subsequent uplink message in the initial access process.
  • the carrier is a single carrier or multiple carriers.
  • the implementation manner of determining, by the terminal device, the carrier used by the terminal device to send the subsequent uplink message in the initial access process according to the carrier configuration information includes but is not limited to the following two types:
  • the carrier configuration information includes direct indication of single carrier or multiple carriers.
  • the terminal device can directly determine the carrier used when transmitting the subsequent uplink message in the initial access process according to the carrier configuration information sent by the received network device.
  • the carrier configuration information includes a time advance threshold.
  • the time advance threshold is used by the terminal device to determine a carrier used by the terminal device to send subsequent uplink messages in the initial access process.
  • the network device sends, to the terminal device, a random access response message including a timing advance amount and carrier configuration information including a timing advance threshold, and the terminal device receives the random access response message that the network device sends the included time advance amount and includes a timing advance
  • the time advance amount can be compared with the time advance threshold, and it is determined that the terminal device is transmitting.
  • the carrier used when the preamble is randomly accessed.
  • the terminal device determines, as the single carrier, the carrier used by the terminal device to send the subsequent uplink message in the initial access process to the network device, which is used to enhance the terminal device.
  • the transmission performance of the uplink beam of the subsequent uplink message in the initial access process is performed, so that the signal quality of the subsequent uplink message in the initial access process is better; if the time advancement amount is less than the time advancement threshold, the terminal device
  • the carrier used by the terminal device to send the subsequent uplink message in the initial access process to the network device is determined to be a multi-carrier, which helps to improve the data transmission rate of the terminal device and save the transmission power of the terminal device.
  • the terminal device may determine the carrier used when transmitting the subsequent uplink message in the subsequent initial access process, so that the terminal device sends the subsequent uplink in the subsequent initial access process to the network device by using the determined carrier. Message.
  • the network device after receiving the random access preamble sent by the terminal device on the multiple uplink beams, the network device sends the random access response message to the terminal device multiple times in a random access response message window.
  • the network device sends a random access response message to the terminal device in a random access response message window, which can ensure that the terminal device is in the correct random manner. Receiving a random access response message sent by the network device in the access response message window.
  • a terminal device provided by the embodiment of the present application has a function of implementing the behavior of the terminal device in the foregoing method example.
  • the structure of the terminal device includes a processing unit and a transceiver unit.
  • the processing unit performs the method provided by any one of the foregoing aspects, and the transceiver unit is configured to receive data and/or send data.
  • a network device provided by an embodiment of the present application has a function of implementing network device behavior in the foregoing method example of the first aspect.
  • the structure of the network device includes a processing unit and a transceiver unit.
  • the processing unit performs the method provided by any one of the foregoing second aspects, and the transceiver unit is configured to receive data and/or send data.
  • the embodiment of the present application further provides a terminal device, where the terminal device has a function of implementing the behavior of the terminal device in the foregoing method example.
  • the structure of the terminal device includes a memory, a processor and a transceiver; a memory for storing a computer readable program; a transceiver for receiving data and/or transmitting data under the control of the processor; a processor, calling the storage
  • the instructions provided in the memory, by the transceiver perform the method provided by any of the implementations of the first aspect above.
  • the embodiment of the present application further provides a network device, where the network device has a function of implementing network device behavior in the foregoing method example of the first aspect.
  • the structure of the network device includes a memory, a processor, and a transceiver; a memory for storing a computer readable program; a transceiver for receiving data and/or transmitting data under the control of the processor; a processor, calling the storage
  • the instructions provided in the memory, by the transceiver perform the method provided by any of the implementations of the first aspect above.
  • the embodiment of the present application further provides a computer storage medium, where the software program stores a software program, where the software program can implement the first aspect or the first step when being read and executed by one or more processors A method provided by any one of the aspects.
  • the embodiment of the present application further provides an initial access device, where the device includes a chip, and the chip may be used to perform the method provided by the first aspect or any one of the foregoing first aspects, the chip
  • the method performed by the terminal device in the first aspect or any one of the foregoing first aspects may be performed by a transceiver (or a communication module), or the chip may also perform the first aspect or the above through a transceiver (or a communication module) Any one of the first aspects A method performed by a network device in an implementation.
  • the embodiment of the present application further provides a communication system, where the communication system includes a terminal device and a network device.
  • the terminal device and the network device cooperate to perform the method provided by the foregoing first aspect or any one of the foregoing first aspects.
  • FIG. 1 is a schematic structural diagram of a network architecture according to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a method for initial access according to an embodiment of the present disclosure
  • FIG. 3A is a schematic structural diagram of a first time slot resource and a sub-band resource according to an embodiment of the present disclosure
  • FIG. 3B is a schematic structural diagram of a second time slot resource and a sub-band resource according to an embodiment of the present disclosure
  • FIG. 3C is a schematic structural diagram of a third time slot resource and a sub-band resource according to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a method for determining a random access preamble according to an embodiment of the present disclosure
  • FIG. 5A is a schematic structural diagram of a synchronization signal block burst set according to an embodiment of the present disclosure
  • FIG. 5B is a schematic structural diagram of another synchronization signal block burst set according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic flowchart of a method for determining an optimal downlink beam according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of another terminal device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of another network device according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • the initial access process of the terminal device mainly includes an initial synchronization and a cell search process, and the network device sends the system configuration information including the random access resource to the terminal device, and the random access process.
  • the network device sends a downlink message such as a synchronization signal to the terminal device on the downlink beam.
  • the network device sends a downlink message such as system configuration information to the terminal device on the downlink beam.
  • the terminal device sends an uplink message in the initial access process such as the random access preamble and the message 3 to the network device on the uplink beam, and the network device sends the random access to the terminal device on the downlink beam. Respond to other downstream messages.
  • the terminal device sends the uplink message in the initial access process to the network device multiple times. Each time the terminal device sends an uplink message in the initial access process to the network device, the terminal device sends an uplink message in the initial access process to the network device on the uplink beam in one direction, so the network device needs to pass the beam every time. Scan to receive an uplink message in the initial access procedure sent by the terminal device.
  • the process of the network device receiving the uplink message in the initial access process includes: the network device detecting, on the uplink beam in each direction, whether there is an uplink message in the initial access process sent by the terminal device, if the network device is uplinked in one direction.
  • the uplink message in the initial access process sent by the terminal device is detected on the beam, and the network device receives the uplink message in the initial access process sent by the terminal device on the uplink beam in the direction.
  • the network device needs to receive the uplink message sent by the terminal device multiple times during the initial access process of the terminal device, and the network device needs to perform beam scanning every time before receiving the uplink message in the initial access process sent by the terminal device, each time beam scanning Process will take some time, so the terminal is set During the initial access process, the network device receives the uplink message sent by the terminal device multiple times, which takes a long time, and the initial access process of the terminal device takes a long time.
  • the present invention provides an initial access method and a device, where the terminal device is on multiple uplink beams, in order to solve the problem that the initial access process of the terminal device is long in the technical solution for the initial access of the existing terminal device.
  • Sending, to the network device, the first uplink message in the initial access process, that is, the random access preamble, and the network device receives the random access preamble sent by the terminal device on the multiple uplink beams, and then from multiple uplink beams.
  • the uplink beam of the random access preamble with the best signal quality is filtered, and the uplink beam is determined as the best uplink beam, so that the terminal device can send the initial access to the network device on the optimal uplink beam each time. Subsequent other upstream messages in the process.
  • the foregoing method can avoid the problem that the network device needs to perform beam scanning before receiving the uplink message in the initial access process, which helps reduce the initial reception of the network device each time.
  • the time taken by the process of the subsequent other uplink messages in the access process can reduce the time of the initial access process of the terminal device, thereby reducing the delay of the initial access process of the terminal device.
  • the method and the device are based on the same concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the method and the device can be referred to each other, and the repeated description is not repeated.
  • the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, and a broadband.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA Wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • 5G system Fifth Generation
  • Terminal devices and network devices are included in these various systems.
  • FIG. 1 relates to a terminal device 101 and a network device 102.
  • FIG. 1 only two terminal devices 101 and one network device 102 are shown.
  • the terminal device 101 and Each of the network devices 102 can be one or more.
  • the terminal device 101 performs initial access within the coverage of the network device 102, and the network device 102 interacts with the terminal device 101.
  • the technical solution provided by the embodiment of the present application is particularly applicable to a scenario in which the terminal device randomly accesses the terminal device during the initial access process. In this scenario, the network device 102 in FIG.
  • the uplink message in the process of the ingress for example, the uplink message in the initial access process may be a random access preamble, message 3, etc., and the random access preamble in the initial access process is often the first uplink message sent.
  • the terminal device involved in the embodiment of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem.
  • the names of terminal devices may also be different.
  • the terminal device may be referred to as user equipment (UE).
  • the wireless terminal device can communicate with one or more core networks via the RAN, which can be a mobile terminal device, such as a mobile telephone (or "cellular" telephone) and a computer with a mobile terminal device, for example, can be portable , pocket, handheld, computer built-in or in-vehicle mobile devices that exchange language and/or data with the wireless access network.
  • Wireless terminal equipment can also Known as system, subscriber unit, subscriber station, mobile station, mobile, remote station, access point, remote terminal equipment ( The remote terminal), the access terminal, the user terminal, the user agent, and the user device are not limited in the embodiment of the present application.
  • a network device may refer to an access point, or a base station, or a device in an access network that communicates with a wireless terminal device over one or more sectors on an air interface, or other name.
  • the network device can be configured to convert the received air frame with an internet protocol (IP) packet as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network can include the internet Protocol (IP) communication network.
  • IP internet protocol
  • Network devices can also coordinate attribute management of air interfaces.
  • the network device involved in the embodiment of the present application may be a base transceiver station (BTS) in GSM or CDMA, a network device (NodeB) in WCDMA, or an evolved network device in an LTE system.
  • 5G base station in the 5G network architecture may also be home evolved node B (HeNB), relay node (relay node), home base station ( Femto), pico base station (pico), etc., are not limited in the embodiment of the present application.
  • HeNB home evolved node B
  • relay node relay node
  • Femto home base station
  • pico pico base station
  • FIG. 2 is a schematic flowchart of a method for initial access, and the interaction process between the terminal device and the network device in FIG. 2 is as follows:
  • the terminal device sends a random access preamble to the network device on multiple uplink beams.
  • the multiple uplink beams have different beam directions, so that the terminal device sends the random access preamble to the network device in different beam directions. Further, the different beam directions of the multiple uplink beams include all beam directions of the entire cell, so as to reduce the time taken by the network device to receive the random access preamble sent by the terminal device.
  • the random access preambles that are sent by the terminal device on the multiple uplink beams may be the same random access preamble, or may be different random access preambles, which is not limited in this embodiment.
  • the terminal device sends a random access preamble to the network device by using different resources on the multiple uplink beams, where the resource includes a time domain resource and/or a frequency domain resource, for example, the time domain resource.
  • a time slot resource may be included, and the frequency domain resource may include a sub-band resource.
  • the method for determining, by the terminal device, the resource used when transmitting the random access preamble on multiple uplink beams may have multiple methods.
  • One method is: before S201, the terminal device receives the resource configuration information sent by the network device, and according to the resource configuration information.
  • the resources used when transmitting the random access preamble on multiple uplink beams are configured, and the method on the network device side is described in S202.
  • Another method is: the terminal device pre-configures resource configuration information.
  • the resource configuration information is used to indicate resources used by the terminal device to send a random access preamble on multiple uplink beams.
  • the manners used by the terminal device to transmit the random access preamble on multiple uplink beams include, but are not limited to, the following:
  • the resource used by the terminal device to send the random access preamble on multiple uplink beams includes one slot resource and multiple subband resources, where multiple subband resources exist in one-to-one or one-to-many with different uplink beams. Correspondence.
  • the terminal device uses the time slot T and the sub-band 1 to transmit a random access preamble on the beam A, using the time slot T.
  • the subband 2 transmits a random access preamble on the beam B, uses a time slot T and a subband 3 to transmit a random access preamble on the beam C, and uses the time slot T and the subband 4 to transmit a random access preamble on the beam D, As shown in Figure 3A.
  • the resource used by the terminal device to send the random access preamble on multiple uplink beams includes multiple time slot resources and multiple sub-band resources, where multiple time slot resources and different uplink beams exist one-to-one or one For a plurality of correspondences, a plurality of sub-band resources and different uplink beams also have a one-to-one or one-to-many correspondence.
  • a plurality of time slot resources have a one-to-many correspondence with different uplink beams
  • a plurality of sub-band resources have a one-to-one correspondence with different uplink beams.
  • the sub-band resources include sub-bands 1 and sub-bands. 2.
  • Subband 3 and subband 4 the uplink beams are beam A, beam B, beam C and beam D
  • the time slot resources are time slot T1 and time slot T2.
  • the terminal device uses the time slot T1 and the sub-band 1 to transmit the random access preamble on the beam A, and uses the time slot T2 and the sub-band 2 to transmit the random access preamble on the beam B, and uses the time slot T1 and the sub-band 3 on the beam C.
  • a random access preamble is transmitted, and a random access preamble is transmitted on the beam D by using the time slot T2 and the subband 4, as shown in FIG. 3B.
  • the sub-band resources include sub-bands 1 and sub-bands.
  • the uplink beam includes beam A, beam B, beam C and beam D.
  • the slot resources include time slot T1, time slot T2, time slot T3 and time slot T4.
  • the terminal device uses the time slot T1 and the sub-band 1 to transmit the random access preamble on the beam A, and uses the time slot T2 and the sub-band 2 to transmit the random access preamble on the beam B, and uses the time slot T3 and the sub-band 3 on the beam C.
  • the random access preamble is transmitted, and the random access preamble is transmitted on the beam D by using the time slot T4 and the subband 4, as shown in FIG. 3C.
  • the resource used by the terminal device to send the random access preamble on multiple uplink beams in S201 is only two modes that may be adopted by the resource used by the terminal device to send the random access preamble on multiple uplink beams in S201.
  • the resource is not limited to other forms.
  • the terminal device After the terminal device obtains the resource configuration information, the terminal device can configure the resource used when the random access preamble is sent on multiple uplink beams according to the resource configuration information, so that the network device can send the random access preamble based on the terminal device.
  • the resource used to indicate the best uplink beam of the terminal device, and the method for the network device to indicate the optimal uplink beam of the terminal device is described in S203.
  • the network device After receiving the random access preamble sent by the terminal device on the multiple uplink beams, the network device selects a random access preamble with the best signal quality from the random access preamble received on the multiple uplink beams.
  • the uplink beam for the network device to receive the random access preamble with the best signal quality is determined as the best uplink beam of the terminal device.
  • the best uplink beam is used by the terminal device to send subsequent uplink messages in the initial access process to the network device on the optimal uplink beam, for example, other uplink messages in the initial access process include the initial access process.
  • Message 3 and other messages include the initial access process.
  • the network device may receive multiple random accesses on multiple uplink beams.
  • the signal quality of the preamble is compared.
  • the signal quality of the random access preamble may be the signal strength of the random access preamble, and the random access preamble with the best signal quality is selected from the plurality of random access preambles.
  • the uplink beam for the network device to receive the random access preamble with the best signal quality is determined as the best uplink beam of the terminal device.
  • the network device receives the number of the random access preambles sent by the terminal device on the multiple uplink beams, and in this case, the network device may determine, as the terminal, the uplink beam used by the network device to receive the random access preamble. The best upstream beam for the device. It should be noted that the method for the network device to compare the signal quality of multiple random access preambles received on multiple uplink beams is similar to the prior art, and details are not described herein again.
  • the network device may send the resource configuration information to the terminal device, for example, the resource configuration information may be carried in a radio resource control (RRC), or the resource configuration information may be carried.
  • the network device is in a resource configuration message generated by a media access control control element (MAC CE).
  • the method for the terminal device to configure the resource used for transmitting the random access preamble on the multiple uplink beams according to the resource configuration information may be referred to the related description in S201, and details are not described herein again. .
  • the network device After determining the optimal uplink beam of the terminal device, the network device sends a random access response message to the terminal device, where the random access response message includes information for indicating an optimal uplink beam.
  • the information used to indicate the optimal uplink beam of the terminal device may include one of a resource used by the terminal device to send a random access preamble on the best uplink beam, and an identifier of an optimal uplink beam. Or multiple, where the resource includes a time slot resource and/or a sub-band resource.
  • the terminal device in S201 uses different resources to send a random access preamble to the network device on multiple uplink beams, and the corresponding relationship between different resources and multiple uplink beams, so the network device in S203
  • the resource used by the terminal device to send the random access preamble on the best uplink beam may be used as information for indicating the best uplink beam, so that the terminal device in S203 may receive the random access response message sent by the network device.
  • the uplink beam corresponding to the resource used by the terminal device to transmit the random access preamble on the best uplink beam is determined to be the most, by matching the corresponding relationship between the different resources and the multiple uplink beams. Good uplink beam.
  • the network device indicates, by using a random access response message, the best uplink beam of the terminal device to the terminal device, so that the terminal device can send subsequent uplink messages in the initial access process to the network device on the optimal uplink wave.
  • the network device receives the subsequent other uplink messages in the initial access process sent by the terminal device, it can receive subsequent uplink messages in the initial access process sent by the terminal device without re-beam scanning, which helps to reduce the network.
  • the time taken by the device to receive the uplink message in the initial access process can reduce the time of the initial access process of the terminal device, thereby reducing the delay of the initial access process of the terminal device.
  • the network device sends a random access response message to the terminal device in a random access response message window, because the terminal device receives the random access response message sent by the network device before Beam scanning is required, and the process of beam scanning may take a long time, causing the terminal device to receive the random access response message sent by the network device in the wrong random access response message window, or even the initial access process of the terminal device fails.
  • the system in which the network device and the terminal device are located is a 5G NR system
  • the stability of the 5GNR system in a high frequency environment is more likely to cause the terminal device to receive the network device in the wrong random access response message window.
  • the random access response message is also more likely to cause the initial access process of the terminal device to fail.
  • the network device in S203 may send the random access to the terminal device multiple times in a random access response message window.
  • the access response message is configured, so that the terminal device can receive multiple random access response messages sent by the network device in a random access response message window, and the terminal device can perform the combining process on the received multiple random access response messages.
  • the terminal device may decode the received random access response message after receiving the random access response message sent by the network device, and if the decoding succeeds, the terminal device stops receiving in a random access response message window. Random access response message to reduce the power consumed by the terminal device to receive the random access response message.
  • the network device may send carrier configuration information carrier configuration information to the terminal device, where the carrier configuration information carrier configuration information is used to indicate that the terminal device sends the random access preamble on multiple uplink beams.
  • the carrier used is single carrier (DFT-S-OFDM) or multi-carrier (CP-OFDM), for example, the carrier is equipped with
  • the information carrier configuration information may be carried in the RRC, or the carrier configuration information carrier configuration information may be carried in a carrier configuration message generated by the network device through the MAC CE.
  • the terminal device may send subsequent uplink messages in the initial access procedure to the network device on the best uplink beam.
  • the terminal device may configure, according to the carrier configuration message sent by the network device in S202, the carrier used by the terminal device to send subsequent uplink messages in the initial access process to be DFT-S-OFDM or CP-OFDM. .
  • the method for determining that the terminal device sends the subsequent uplink message in the initial access process may be multiple, and one method is: before S203, the terminal device may receive carrier configuration information sent by the network device, where the carrier device
  • the configuration information is used to indicate that the carrier used by the terminal device to send subsequent uplink messages in the initial access process is DFT-S-OFDM or CP-OFDM, and the terminal device determines, according to the received carrier configuration information, that the terminal device sends the initial access process.
  • the carrier used in the subsequent uplink message, and the method on the network device side refer to the method for the network device to send the carrier configuration information to the terminal device, which is not described here.
  • the implementation manner of the carrier configuration information includes but is not limited to the following:
  • the carrier configuration information includes a carrier that directly indicates that the terminal device sends subsequent uplink messages in the initial access process, and is a DFT-S-OFDM or a CP-OFDM. In this manner, the terminal device can directly determine the carrier used when transmitting subsequent uplink messages in the initial access procedure according to the carrier configuration information sent by the received network device.
  • the carrier configuration information includes a time advance threshold.
  • the time advance threshold may be used by the terminal device to determine a carrier used by the terminal device to send subsequent uplink messages in the initial access process.
  • the terminal device may receive a time advance amount included in the random access response message sent by the network device and a time advance amount threshold included in the carrier configuration information, and the terminal device advances the time advance amount and the time advance amount.
  • the threshold is compared to determine a carrier used by the terminal device when transmitting subsequent uplink messages in the initial access procedure. If the time advancement amount is greater than or equal to the time advancement threshold, the distance between the terminal device and the network device is large, so the terminal device uses the terminal device to send subsequent uplink messages in the initial access process to the network device.
  • the carrier is determined to be DFT-S-OFDM to enhance the transmission performance of the uplink beam used for transmitting subsequent uplink messages in the initial access procedure, so that the signal quality of subsequent uplink messages in the initial access procedure is better; If the time advance is less than the time advance threshold, the distance between the terminal device and the network device is small, so the terminal device determines the carrier used by the terminal device to send subsequent uplink messages in the initial access process to the network device. For CP-OFDM, the data transmission rate of the terminal is increased, and the transmission power of the terminal device is saved.
  • the terminal device may determine, by using the carrier configuration information, the carrier used by the terminal device to send subsequent uplink messages in the initial access process, so as to enhance the terminal device to send subsequent uplink messages in the initial access process.
  • Uplink beam performance may be determined, by using the carrier configuration information, the carrier used by the terminal device to send subsequent uplink messages in the initial access process, so as to enhance the terminal device to send subsequent uplink messages in the initial access process. Uplink beam performance.
  • the terminal device may determine a random access preamble transmitted to the network device on multiple uplink beams.
  • FIG. 4 is a schematic flowchart of a method for determining a random access preamble. The interaction process between the terminal device and the network device in FIG. 4 is as follows:
  • the network device sends, according to a synchronization signal block time index carried by the multiple synchronization signal blocks, a plurality of synchronization signal blocks to the terminal device on different downlink beams.
  • the synchronization signal block time index is used to indicate a time sequence in which the synchronization signal block carrying the synchronization signal block time index is transmitted in the plurality of synchronization signal blocks, and the synchronization signal block is used by the terminal device according to the received one.
  • the synchronization signal block time index carried by the step signal block determines a random access preamble transmitted by the terminal device on multiple uplink beams. For example, it is assumed that there are four synchronization signal blocks, which are a synchronization signal block A carrying a synchronization signal block time index 1 , a synchronization signal block B carrying a synchronization signal block time index 2, and a synchronization signal block carrying a synchronization signal block time index 3 C.
  • the synchronization signal block D carrying the synchronization signal block time index 4, the synchronization signal block time index carried in each of the four synchronization signal blocks is in the chronological order indicated by the time index of each synchronization signal block. From the first to the last, the synchronization signal block time index 1, the synchronization signal block time index 2, the synchronization signal block time index 3, the synchronization signal block time index 4, and the synchronization signal block time carried by the network device according to the 4 synchronization signal blocks.
  • the sequence of transmitting the four synchronization signal blocks to the terminal device on different downlink beams is, in order from the first to the last, the synchronization signal block A, the synchronization signal block B, the synchronization signal block C, and the synchronization signal block D.
  • the synchronization signal block may include a synchronization signal, a reference signal, and a PBCH, and may carry a synchronization signal block time index in a PBCH included in the synchronization signal block, where each of the plurality of synchronization signal blocks carries The synchronization signal block time index is different.
  • the synchronization signal includes a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and the reference signals include, but are not limited to, DMRS.
  • the time sequence index of the synchronization signal block is represented by a bit sequence.
  • the bit sequence includes two bits, and when the bit sequences are 00, 01, 10, and 11, respectively, respectively, the time index corresponding to the synchronization signal block represented by the bit sequence is corresponding.
  • the order in which the sync signal blocks are transmitted is, in order, the first transmission, the second transmission, the third transmission, and the fourth transmission.
  • all the bits included in the bit sequence for indicating the synchronization signal block time index may be carried in the PBCH included in the synchronization signal block, for example, the bit sequence is 10 and the PBCH carries 10.
  • the partial bit included in the bit sequence for indicating the synchronization signal block time index may be carried in the PBCH included in the synchronization signal block, and the other part included in the synchronization signal block is included in the other part included in the synchronization signal block.
  • Partial bits, other parts included in the synchronization signal block include but are not limited to DMRS included in the synchronization signal block, the other partial bits refer to bits other than part of the bits carried in the PBCH in the bit sequence, for example, the bit sequence is 10, and the PBCH carries 1, DMRS carries 0. Different DMRS sequences can carry different bit sequences.
  • different downlink beams have different beam directions
  • the network device may send the synchronization signal block to the terminal device in different beam directions according to the time sequence indicated by the synchronization signal block time index carried by the plurality of synchronization signal blocks.
  • the different beam directions of the multiple downlink beams include all beam directions of the entire cell, so that the terminal devices in the arbitrary beam direction of the entire cell can receive the synchronization signal block sent by the network device, and thus the arbitrary beam direction of the entire cell.
  • the above terminal devices can determine the random access preamble transmitted by themselves on the plurality of uplink beams by receiving the synchronization signal block from the network device.
  • a plurality of synchronization signal blocks may be divided into multiple groups, and each group of synchronization signal blocks is referred to as a synchronization signal block burst (SS Block Burst) to obtain a plurality of synchronization signal block bursts.
  • SS Block Burst synchronization signal block burst
  • the plurality of synchronization signal block bursts may be divided into one or more groups, and each group of synchronization signal block bursts is referred to as a synchronization signal block burst set (SS Block Burst Set).
  • each synchronization signal block burst set includes two synchronization signal block bursts, and each synchronization signal block burst includes 12 synchronization signal blocks, which is in S401.
  • the network device may send the 12 synchronization signals to the terminal device on different downlink beams according to the synchronization signal block time index carried by the 12 synchronization signal blocks included in one synchronization signal block burst.
  • the network device may send the 24 timing packets to the terminal device on different downlink beams according to the synchronization signal block time index carried by the 24 synchronization signal blocks included in a synchronization signal block burst set in the time period of the duration T.
  • the sync signal block is shown in Figure 5A. Or can To divide a plurality of sync signal block bursts into one or more groups, each set of sync signal block bursts is called a synchronization signal block burst period (SS Block Burst Period), and then multiple The sync signal block burst segment is divided into one or more groups, and each group of sync signal block burst segments is called a sync signal block burst set.
  • the synchronization signal block time index carried by each synchronization signal block included in one of the synchronization signal block burst sets is different.
  • a sync signal block burst set includes four sync signal block burst segments, and one sync signal block burst segment includes a plurality of sync signal block bursts, and one of the plurality of sync signal block bursts
  • the burst includes a synchronization signal block A carrying a synchronization signal block time index 0, a synchronization signal block B carrying a synchronization signal block time index 1, a synchronization signal block C carrying a synchronization signal block time index 2, and a synchronization signal block time index 3 carrying
  • the sync signal block D each of the four sync signal blocks is composed of 14 sub-signal blocks, and the timing signals of the sync signal blocks carried by the four sync signal blocks are different, as shown in FIG. 5B.
  • the different downlink beams used by the network device to send each synchronization signal block included in one synchronization signal burst in S401 are downlink beams in all beam directions of the entire cell, so that the network device sends a synchronization signal by sending a synchronization signal.
  • the block burst can complete one beam scanning of the entire cell, and the network device can complete multiple beam scanning of the entire cell by transmitting a synchronization signal block burst set.
  • the different downlink beams used by the network device to send each synchronization signal block included in a synchronization signal burst set in S401 are downlink beams in all beam directions of the entire cell, so that the network device sends a downlink beam.
  • the sync signal block burst set can perform a single beam scan of the entire cell.
  • the network device can complete the multiple beam scanning of the entire cell by sending a synchronization signal block burst set, and the network device can complete the entire cell once by sending a synchronization signal block burst set.
  • the implementation of the beam scanning can reduce the number of coding bits occupied by the synchronization signal block time index carried by the synchronization signal block, and can also enable the network device to complete the first beam scanning of the entire cell at a smaller granularity, and improve the beam scanning. Precision.
  • the terminal device receives, by the network device, a synchronization signal block of the plurality of synchronization signal blocks carrying the synchronization signal block time index transmitted on different downlink beams.
  • the one synchronization signal block may be a synchronization signal block that is received by the terminal device for the first time.
  • the network device sends, to the terminal device, a plurality of synchronization signal blocks carrying the synchronization signal block time index on different downlink beams.
  • the terminal device can receive one of the plurality of synchronization signal blocks sent by the network device and carry the synchronization. Synchronization signal block for signal block time indexing.
  • the terminal device may receive a synchronization signal block that is sent by the network device and carries a synchronization signal block time index, and suspend the time that the receiving network device subsequently transmits the synchronization signal block after receiving the synchronization signal block.
  • the sync signal block of the index may be received from the network device and carries a synchronization signal block time index, and suspend the time that the receiving network device subsequently transmits the synchronization signal block after receiving the synchronization signal block.
  • the terminal device may receive, by the network device, a plurality of synchronization signal blocks that carry a synchronization signal block time index, and select a synchronization with the best signal quality from the received multiple synchronization signal blocks. Signal block. It should be noted that the terminal device may receive the synchronization signal block that carries the synchronization signal block time index sent by the network device in other manners, which is not limited in this embodiment.
  • the terminal device determines the random access preamble corresponding to the synchronization signal block time index carried by the received synchronization signal block by matching the preset synchronization signal block time index and the random access preamble correspondence.
  • the random access preamble determined by the terminal device in S403 is the random access preamble sent by the terminal device to the network device on multiple uplink beams in S201 in the method shown in FIG. 2 .
  • the correspondence between the preset synchronization signal block time index and the random access preamble includes but is not limited to one of the following correspondences:
  • Correspondence relationship 1 at least one synchronization signal block time index is in one-to-one correspondence with at least one random access preamble.
  • the random access preamble sent by the terminal device on the multiple uplink beams is a random access preamble corresponding to the synchronization signal block time index carried by the synchronization signal block received by the terminal device, and the terminal is at this time.
  • the random access preamble transmitted by the device on multiple uplink beams is the same random access preamble. For example, it is assumed that there are N synchronization signal block time indexes and N random access preambles, wherein N is an integer greater than 0, and the preset synchronization signal block time index in S403 corresponds to the random access preamble.
  • Table 1 The relationship is shown in Table 1 below.
  • Corresponding relationship 2 at least one synchronization signal block time index is in one-to-one correspondence with at least one random access preamble group, and each random access preamble group in at least one random access preamble group includes multiple random access preambles .
  • the random access preamble sent by the terminal device on the multiple uplink beams may be included in a random access preamble group corresponding to the synchronization signal block time index carried by the synchronization signal block received by the terminal device.
  • One or more of the plurality of random access preambles, such that each of the random access preambles transmitted by the terminal device on the plurality of uplink beams may be the same or different random access preambles. For example, suppose there are M synchronization signal block time indexes and M random access preamble groups one-to-one correspondence, where M is an integer greater than 0, and the preset synchronization signal block time index and random access preamble group in S403 The corresponding relationship is shown in Table 2 below.
  • the terminal device may determine, by matching the synchronization signal block time index carried by the received synchronization signal block and the preset correspondence one or two, the random access preamble transmitted to the network device on the multiple uplink beams.
  • the terminal device may preset a correspondence between the synchronization signal block time index and the resource, where the correspondence between the synchronization signal block time index and the resource is used in S201 in the method shown in FIG. 2
  • the terminal device determines, according to the correspondence between the synchronization signal block time index and the resource, the resource used when transmitting the random access preamble on the multiple uplink beams.
  • the resource configuration information in the method shown in FIG. 2 may include a correspondence relationship between a synchronization signal block time index and a resource.
  • the terminal device in S403 can determine the synchronization signal block time index carried by the received synchronization signal block and the corresponding correspondence between the synchronization signal block time index and the resource, and determine the method in the method shown in FIG. S201:
  • the correspondence between the synchronization signal block time index and the resource includes, but is not limited to, one or a combination of the following correspondences:
  • At least one synchronization signal block time index is in one-to-one correspondence with at least one time domain resource, where the time domain resource is a time domain resource used by the terminal device to send a random access preamble, where the time domain resource includes but is not limited to Time slot resource.
  • the time domain resource used by the terminal device to send the random access preamble on the multiple uplink beams may be the time domain resource corresponding to the synchronization signal block time index carried by the synchronization signal block received by the terminal device.
  • the time domain resource Taking the time domain resource as the time slot resource as an example, if the time slot resource corresponding to the synchronization signal block time index carried by the synchronization signal block received by the terminal device is the time slot T, the terminal device uses the time slot T in multiple uplink beams. Send a random access preamble on it.
  • the at least one synchronization signal block time index is in one-to-one correspondence with the at least one frequency domain resource, where the frequency domain resource is a frequency domain resource used by the terminal device to send a random access preamble, where the frequency domain resource includes but is not limited to A frequency resource, a sub-band resource, or the like, wherein one sub-band resource may include multiple physical resource blocks.
  • the frequency domain resource used by the terminal device to transmit the random access preamble on the multiple uplink beams may be the frequency domain corresponding to the time index of the synchronization signal block carried by the synchronization signal block received by the terminal device.
  • Resources For example, it is assumed that there are Q synchronization signal block time indexes and Q sub-band resources one-to-one correspondence, wherein Q is an integer greater than 0, and the correspondence relationship between the synchronization signal block time index and the sub-band resources is as shown in Table 4 below.
  • the terminal device adopts sub-band A in multiple uplink beams. Send a random access preamble on it.
  • the frequency domain resource as the sub-band resource group as an example, assume that the sub-band resource corresponding to the synchronization signal block time index carried by the synchronization signal block received by the terminal device is a resource group consisting of sub-band A, sub-band B, and sub-band C.
  • the terminal device uses the sub-band A to transmit the random access preamble on the first uplink beam, and the sub-band B transmits the random access preamble on the second uplink beam, and the sub-band C is used in the third uplink.
  • a random access preamble is transmitted on the beam.
  • the terminal device may determine a random access preamble sent by the terminal device to the network device on multiple uplink beams, where the random access preamble is S201 in the method shown in FIG. A random access preamble transmitted by the terminal device to the network device on multiple uplink beams.
  • the terminal device sends the following to the network device on multiple uplink beams.
  • the machine accesses the preamble, and the network device selects the uplink beam of the random access preamble with the best signal quality from the different uplink beams after receiving the random access preamble, and determines the uplink beam as the best uplink beam. Therefore, the terminal device can send subsequent uplink messages in the initial access process to the network device on the optimal uplink wave, and the network device can receive the message sent by the terminal device on the optimal uplink beam, so that the network device does not need to re-beam.
  • the scanning can receive the message sent by the terminal device, reducing the time taken by the network device to receive the random access preamble and subsequent other uplink messages in the initial access process, and reducing the time of the initial access process of the terminal device. The delay of the initial access process of the terminal device is reduced.
  • the network device sends a downlink message such as a synchronization signal, a system configuration information, a random access response message, and the like to the terminal device.
  • a downlink message such as a synchronization signal, a system configuration information, a random access response message, and the like.
  • the network device sends the downlink in the initial access process to the terminal device in the downlink beam in one direction.
  • the message is that the terminal device needs to detect whether there is a downlink message in the initial access process sent by the network device by using the beam scanning in each direction of the downlink beam.
  • the terminal device detects the downlink message in the initial access process sent by the network device on the downlink beam in one direction, the terminal device receives the downlink message in the initial access process sent by the network device on the downlink beam in the direction. Since the network device sends the downlink message in the initial access process to the terminal device multiple times, the terminal device needs to perform beam scanning before receiving the downlink message in the initial access process sent by the network device, and the process of each beam scanning may be performed. The process of receiving the downlink message sent by the network device for a long time in the initial access process of the terminal device may take a long time, and the initial access process of the terminal device takes a long time.
  • this embodiment provides A method for determining an optimal downlink beam, where the terminal device and the network device are involved, and the terminal device and the network device involved in the method may be the same device as the terminal device and the network device involved in the method shown in FIG. 2 .
  • FIG. 6 is a schematic flowchart of a method for determining an optimal downlink beam. The interaction process between the terminal device and the network device in FIG. 6 is as follows:
  • the network device sends, according to a synchronization signal block time index carried by the multiple synchronization signal blocks, a plurality of synchronization signal blocks on different downlink beams, where the synchronization signal block time index is used to indicate a synchronization signal that carries the synchronization signal block time index.
  • the synchronization signal block is used by the terminal device to determine, according to the received synchronization signal block time index carried by the synchronization signal block, the random transmission of the terminal device on the multiple uplink beams. Access the preamble.
  • the network device sends multiple synchronization signal blocks on different downlink beams
  • the network device in S401 in the method shown in FIG. 4 sends multiple synchronization signal blocks on different downlink beams.
  • the network device in S401 in the method shown in FIG. 4 sends multiple synchronization signal blocks on different downlink beams.
  • the terminal device receives one synchronization signal block of the plurality of synchronization signal blocks sent by the network device to the terminal device on different downlink beams, where the synchronization signal block may be a synchronization signal block that is received by the terminal device for the first time.
  • the network device sends, on different downlink beams, a plurality of synchronization signal blocks carrying a synchronization signal block time index
  • the terminal device may receive one of the plurality of synchronization signal blocks sent by the network device on different downlink beams. Synchronization signal block.
  • the terminal device may receive a synchronization signal block that is sent by the network device and carries a synchronization signal block time index, and suspend the time that the receiving network device subsequently transmits the synchronization signal block after receiving the synchronization signal block.
  • the sync signal block of the index can receive the network.
  • the plurality of synchronization signal blocks carrying the synchronization signal block time index are sent by the network device, and a synchronization signal block with the best signal quality is selected from the received plurality of synchronization signal blocks.
  • the terminal device may receive the synchronization signal block that carries the synchronization signal block time index sent by the network device in other manners, which is not limited in this embodiment.
  • the terminal device determines, by matching a preset synchronization signal block time index and a random access preamble, a random access preamble corresponding to a synchronization signal block time index carried by the received synchronization signal block, and the determined random connection
  • the preamble is a random access preamble that the terminal device sends to the network device on multiple uplink beams by using preset resources.
  • the method for the random access preamble corresponding to the synchronization signal block time index carried by the block is the same.
  • the terminal device determines the random connection corresponding to the time index of the synchronization signal block carried by the received synchronization signal block. A description of the method of entering the preamble will not be repeated here.
  • the terminal device sends a random access preamble to the network device.
  • the terminal device may send a random access preamble to the network device on multiple uplink beams.
  • the method for the terminal device to send the random access preamble to the network device on multiple uplink beams and the S201 in the method shown in FIG. 2, send the terminal device to the network device on multiple uplink beams.
  • the method of randomly accessing the preamble refer to the related description of the method for the terminal device to send the random access preamble to the network device on multiple uplink beams in S201 in the method shown in FIG. 2, and details are not described herein again.
  • the network device After receiving the random access preamble sent by the terminal device, the network device determines the synchronization signal block time corresponding to the received random access preamble by matching the correspondence between the preset synchronization signal block time index and the random access preamble. Indexing, and determining, in S601, a downlink beam for transmitting a synchronization signal block carrying the synchronization signal block time index as an optimal downlink beam.
  • the best downlink beam is used by the network device to send subsequent downlink messages in the initial access process to the terminal device on the optimal downlink beam.
  • the network device in S605 After receiving the random access preamble sent by the terminal device, the network device in S605 matches the received random access preamble and the preset synchronization signal block time index with the random access preamble to determine the received random number.
  • the synchronization signal block time index corresponding to the access preamble is accessed, and the downlink beam used for transmitting the synchronization signal block carrying the synchronization signal block time index is determined as the optimal downlink beam.
  • the network device determines the optimal downlink beam by using the method for determining the optimal downlink beam, as shown in FIG. 6, so that the network device can send subsequent downlink messages in the initial access process to the terminal device on the optimal downlink wave, thereby reducing the terminal.
  • S601 may be the same step as S401 in the method shown in FIG. 4
  • S602 may be the same step as S402 in the method shown in FIG. 4
  • S403 and S403 in the method shown in FIG. It may be the same step
  • S201 may be the same step as S201 in the method shown in FIG. 2.
  • S605 can be shown in Figure 2. Executed before S201 in the method, it may be executed after S201 in the method shown in FIG. 2, and may also be performed together with S201 in the method shown in FIG. 2, which is not limited in this embodiment.
  • the network device may send a subsequent downlink message, such as a random access response message, in the initial access process to the terminal device on the optimal downlink beam, so that the terminal device can reduce the random access response.
  • a subsequent downlink message such as a random access response message
  • the time consumed by the process of the message so that the time of the initial access process of the terminal device can be reduced.
  • the network device may further carry information for indicating an optimal downlink beam in the random access response message.
  • the terminal device After receiving the random access response message sent by the network device, the terminal device obtains the information indicating the best downlink beam carried in the random access response message, and carries the information indicating the best downlink beam in the initial access process.
  • subsequent uplink messages subsequent uplink messages in the initial access procedure are sent to the network device.
  • the network device can determine, according to subsequent other uplink messages in the initial access process, the best downlink beam used by the terminal device to send subsequent downlink messages in the initial access process, which helps save network devices for storing the consumed storage.
  • the space also helps to reduce the time taken by the terminal device to receive the downlink message in the initial access process each time, thereby further reducing the time of the initial access process of the terminal device.
  • the terminal device sends the random access preamble to the network device until the terminal device sends the subsequent other uplink messages in the initial access process to the network device, the terminal device is displaced during the period of time, which may cause the terminal The location of the device is no longer in the beam direction of the best downlink beam determined by the network device according to the random access preamble. If the network device still sends the initial access to the terminal device on the determined optimal downlink beam. The subsequent downlink message in the process may not receive the subsequent downlink message in the initial access process sent by the network device.
  • the terminal device in order to ensure that the terminal device can receive the subsequent downlink message in the initial access process sent by the network device, in an implementation manner, after S603, the terminal device sends the time index including the time block carrying the synchronization signal block to the network device.
  • the subsequent uplink message in the initial access process of the synchronization signal block, the synchronization signal block included in the subsequent other uplink messages in the initial access process is the terminal device sending the subsequent other uplink in the initial access process after S603
  • a synchronization signal block that is re-received before the message is received by the network device after receiving the subsequent other uplink messages in the initial access process sent by the terminal device, and may be carried according to the synchronization signal block included in the subsequent other uplink messages in the received initial access process.
  • the synchronization signal block time index is performed again, and S604 is performed to re-determine the optimal downlink beam used by the network device to send subsequent downlink messages in the initial access procedure.
  • the time from when the terminal device sends the random access preamble to the network device to the time when the terminal device sends the subsequent other uplink message in the initial access process to the network device even if the terminal device is displaced within the period between the segments
  • the location of the terminal device is no longer in the beam direction of the best downlink beam determined by the network device according to the random access preamble, and the network device can still re-determine to the terminal device for sending the subsequent access process.
  • the optimal downlink beam of the downlink message can ensure that the terminal device can receive subsequent downlink messages in the initial access process sent by the network device, which helps to further reduce the subsequent downlink messages received by the terminal device in the initial access process.
  • the network device sends multiple synchronization signal blocks on different downlink beams according to the synchronization signal block time index carried by the multiple synchronization signal blocks, and the terminal device receives one carrier. After the synchronization signal block with the synchronization signal block time index is matched, the correspondence between the preset synchronization signal block time index and the random access preamble is matched to determine the random access corresponding to the synchronization signal block time index carried by the received synchronization signal block.
  • the preamble transmits a random access preamble to the network device, and the network device determines the received random access by matching the preset correspondence between the synchronization signal block time index and the random access preamble after receiving the random access preamble.
  • the device sends the subsequent downlink message in the initial access process, which helps reduce the time taken by the terminal device to receive the downlink message in the initial access process, and further reduces the time of the initial access process of the terminal device. Thereby, the delay of the initial access process of the terminal device is further reduced.
  • the embodiment of the present application further provides a terminal device, which can implement the method performed by the terminal device in the method provided by the embodiment corresponding to FIG. 2 .
  • the terminal device includes: a transceiver unit 701, where
  • the transceiver unit 701 is configured to send a random access preamble to the network device on the multiple uplink beams, where the random access preamble is used by the network device to filter out the best uplink beam of the terminal device from the multiple uplink beams, the terminal device
  • the best uplink beam is the uplink beam of the random access preamble with the best signal quality of the network equipment among the multiple uplink beams.
  • the transceiver unit 701 is further configured to: when the random access preamble is sent to the network device on the multiple uplink beams, the receiving network device sends the synchronization signal block time on different downlink beams.
  • the processing unit 702 of the terminal device is configured to match the preset synchronization signal block time index and the random access preamble correspondence after the transceiver unit 701 receives the synchronization signal block that carries the synchronization signal block time index sent by the network device.
  • the determined random access preamble is a random access preamble sent by the transceiver unit 701 to the network device on multiple uplink beams.
  • the determined random access preamble is used by the network device to determine an optimal downlink beam by using a preset synchronization signal block time index and a random access preamble and the random access preamble.
  • the synchronization signal block includes a primary synchronization signal, a secondary synchronization signal, a reference signal, and a PBCH
  • the synchronization signal block time index can be carried in the PBCH.
  • the correspondence between the synchronization signal block time index and the random access preamble may be preset to one of the following correspondences: at least one synchronization signal block time index is in one-to-one correspondence with at least one random access preamble; at least one synchronization signal block time index
  • each random access preamble group includes a plurality of random access preambles.
  • the transceiver unit 701 may send a random access preamble to the network device on multiple uplink beams by using different resources, where different resources include different time slot resources and/or different sub-band resources.
  • the transceiver unit 701 may further receive resource configuration information sent by the network device, where the resource configuration information is used to indicate the terminal, before sending the random access preamble to the network device by using different resources on the multiple uplink beams. Different resources used by the device to transmit random access preambles on multiple uplink beams.
  • the transceiver unit 701 may further receive a random access response message sent by the network device after the random access preamble is sent to the network device on the multiple uplink beams, where the random access response message includes The information of the best uplink beam of the terminal equipment.
  • the information used to indicate the optimal uplink beam of the terminal device may include one or a combination of the following information: the time slot resource used by the transceiver unit 701 to transmit the random access preamble on the best uplink beam and/or Subband resource, the identifier of the best upstream beam.
  • the transceiver unit 701 may further send carrier configuration information sent by the network device after the random access preamble is sent to the network device, where the carrier configuration information is used to indicate that the terminal device sends the initial connection.
  • the carrier used in the subsequent uplink message in the process is single carrier or multiple carrier.
  • the carrier configuration information includes direct indication of single carrier or multiple carriers; or carrier configuration information.
  • the time advance threshold is used, and the time advance threshold is used by the terminal device to determine a carrier used by the terminal device to send subsequent uplink messages in the initial access process.
  • the division of the unit in the embodiment of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner.
  • the functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • a computer readable storage medium A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .
  • the embodiment of the present application further provides a terminal device, which uses the method performed by the terminal device in the method provided by the embodiment corresponding to FIG. 2, and may be the same device as the terminal device shown in FIG. .
  • the terminal device includes: a processor 801, a transceiver 802, and a memory 803, where:
  • the processor 801 is configured to read a program in the memory 803 and perform the following process:
  • the random access preamble is sent to the network device by using the transceiver 802, and the random access preamble is used by the network device to filter out the best uplink beam of the terminal device from the multiple uplink beams, where the terminal device is the most
  • the uplink beam is the uplink beam of the random access preamble with the best signal quality of the network equipment in the multiple uplink beams;
  • the transceiver 802 is configured to receive and transmit data under the control of the processor 801; the transceiver 802 can also be a communication module that includes a communication interface for receiving data and/or transmitting data.
  • the processor 801 is further configured to: before the sending, by the transceiver 802, the random access preamble to the network device on the multiple uplink beams, the multiple received by the receiving network device on different downlink beams a synchronization signal block in the synchronization signal block of the synchronization signal block time index, the one synchronization signal block being a synchronization signal block received by the transceiver 802 for the first time; the terminal device further comprising a processor 801, configured to receive the network device transmission at the transceiver 802 After the synchronization signal block carrying the synchronization signal block time index is matched, determining the time index of the synchronization signal block carried by the received synchronization signal block by matching the correspondence between the preset synchronization signal block time index and the random access preamble The random access preamble, the determined random access preamble is a random access preamble sent by the processor 801 to the network device by using the transceiver 802, and the determined random access preamble is used for the network device
  • the synchronization signal block includes a primary synchronization signal, a secondary synchronization signal, a reference signal, and a physical broadcast channel PBCH, which can carry a synchronization signal block time index in the PBCH.
  • Corresponding relationship between the preset synchronization signal block time index and the random access preamble may include one of the following correspondences: at least one synchronization signal block time index is in one-to-one correspondence with at least one random access preamble; at least one synchronization signal block time The index is in one-to-one correspondence with at least one random access preamble group, and each random access preamble group includes a plurality of random access preambles.
  • the processor 801 may send a random access preamble to the network device by using the different resources on the multiple uplink beams by the transceiver 802, where the different resources include different time slot resources and/or different Subband resources.
  • the processor 801 may further receive resource configuration information sent by the network device before sending the random access preamble to the network device by using the different resources by the transceiver 802.
  • the information is used to indicate different resources used by the terminal device to transmit the random access preamble on multiple uplink beams.
  • the processor 801 is further configured to: after the random access preamble is sent to the network device by using the transceiver 802, receive the random access response message sent by the network device by using the transceiver 802, where The random access response message includes information indicating an optimal uplink beam of the terminal device.
  • the information for indicating the optimal uplink beam of the terminal device includes one or a combination of the following information: the time slot resource and/or the sub-band resource used by the transceiver 802 to transmit the random access preamble on the best uplink beam. ; the identification of the best upstream beam.
  • the processor 801 may further send, by using the transceiver 802, a random access preamble to the network device on the multiple uplink beams, and then receive, by using the transceiver 802, carrier configuration information sent by the network device, where the carrier configuration information is used.
  • the carrier used when instructing the terminal device to send subsequent uplink messages in the initial access process is a single carrier or multiple carriers.
  • the carrier configuration information includes directly indicating a single carrier or multiple carriers; or the carrier configuration information includes a time advance threshold, where the terminal advance threshold is used by the terminal device to determine a subsequent uplink in the initial access process of the terminal device.
  • the carrier used in the message includes directly indicating a single carrier or multiple carriers; or the carrier configuration information includes a time advance threshold, where the terminal advance threshold is used by the terminal device to determine a subsequent uplink in the initial access process of the terminal device. The carrier used in the message.
  • the processor 801, the transceiver 802, and the memory 803 are connected to each other through a bus; the bus may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 801 and various circuits of memory represented by memory 803.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 802 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 can store data used by the processor 801 in performing operations.
  • the processor 801 can be a central processing unit, an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (complex programmable logic device). , CPLD).
  • ASIC application specific integrated circuit
  • FPGA field-programmable gate array
  • CPLD complex programmable logic device
  • the embodiment of the present application further provides a network device, where the network device can implement the method performed by the network device in the method provided by the embodiment corresponding to FIG. 2 .
  • the network device includes: a transceiver unit 901 and a processing unit 902, where
  • the transceiver unit 901 is configured to receive a random access preamble that is sent by the terminal device on multiple uplink beams.
  • the processing unit 902 is configured to filter out a random access preamble with the best signal quality from the random access preamble received by the transceiver unit 901 on the multiple uplink beams, and receive the best signal quality by the transceiver unit 901.
  • the uplink beam entering the preamble is determined as the best uplink beam of the terminal equipment.
  • the transceiver unit 901 may further receive different downlink beams according to a synchronization signal block time index carried by the multiple synchronization signal blocks before receiving the random access preamble transmitted by the terminal device on the multiple uplink beams.
  • the synchronization signal block includes a primary synchronization signal, a secondary synchronization signal, a reference signal, and a PBCH, and the synchronization signal block time index can be carried in the PBCH.
  • the transceiver unit 901 can also send a random access response message to the terminal device, where the random access response message includes information indicating an optimal uplink beam of the terminal device.
  • the information used to indicate the optimal uplink beam of the terminal device includes: a time slot resource and/or a sub-band resource used by the terminal device to send a random access preamble on the best uplink beam; and / or, the identification of the best upstream beam.
  • the processing unit 902 may further, after the transceiver unit 901 receives the random access preamble sent by the terminal device on the multiple uplink beams, by matching the preset synchronization signal block time index and the random access preamble. Corresponding relationship, determining a synchronization signal block time index corresponding to the received random access preamble, and determining a downlink beam for transmitting the synchronization signal block carrying the synchronization signal block time index as an optimal downlink beam.
  • the correspondence between the synchronization signal block time index and the random access preamble may be preset to one of the following correspondences: at least one synchronization signal block time index is in one-to-one correspondence with at least one random access preamble; The at least one synchronization signal block time index is in one-to-one correspondence with the at least one random access preamble group, and each of the random access preamble groups includes a plurality of random access preambles.
  • the transceiver unit 901 when receiving the random access preamble sent by the terminal device on the multiple uplink beams, the transceiver unit 901 is specifically configured to: the receiving terminal device uses different resources to send random connections on multiple uplink beams. Into the preamble, different resources include different time slot resources and/or different sub-band resources.
  • the transceiver unit 901 may further send resource configuration information to the terminal device before receiving the random access preamble sent by the terminal device on the multiple uplink beams by using different resources, where the resource configuration information is used to indicate Different resources used by the terminal device to transmit a random access preamble on multiple uplink beams.
  • the transceiver unit 901 may further send carrier configuration information to the terminal device after receiving the random access preamble sent by the terminal device on the multiple uplink beams, where the carrier configuration information is used to indicate that the terminal device sends the initial connection.
  • the carrier used in the subsequent uplink message in the process is single carrier or multiple carrier.
  • the carrier configuration information includes a direct indication of a single carrier or multiple carriers; or the carrier configuration information includes a time advance threshold.
  • the time advance threshold is used by the terminal device to determine a subsequent uplink message sent by the terminal device in the initial access process. Carrier.
  • the transceiver unit 901 may further send the random access response to the terminal device multiple times in a random access response message window after receiving the random access preamble sent by the terminal device on the multiple uplink beams. Message.
  • the embodiment of the present application further provides a network device, where the network device uses the method performed by the network device in the method provided by the embodiment corresponding to FIG. 2, and may be the same device as the network device shown in FIG. .
  • the network device includes: a processor 1001, a transceiver 1002, and a memory 1003, wherein:
  • the processor 1001 is configured to read a program in the memory 1003 and perform the following process:
  • the processor 1001 is configured to receive, by the transceiver 1002, a random access preamble that is sent by the terminal device on multiple uplink beams.
  • the processor 1001 is further configured to filter, from the random access preamble received by the transceiver 1002 on the multiple uplink beams, a random access preamble with the best signal quality, and the transceiver 1002 receives the best random signal quality.
  • Access preamble The uplink beam of the code is determined as the best uplink beam of the terminal device;
  • the transceiver 1002 is configured to receive and transmit data under the control of the processor 1001; the transceiver 1002 can also be a communication module including a communication interface for receiving data and/or transmitting data.
  • the processor 1001 may further perform, according to the synchronization signal block time index carried by the multiple synchronization signal blocks, by the transceiver 1002 before receiving the random access preamble transmitted by the terminal device on the multiple uplink beams.
  • the synchronization signal block includes a primary synchronization signal, a secondary synchronization signal, a reference signal, and a PBCH, and the synchronization signal block time index can be carried in the PBCH.
  • the processor 1001 may further send a random access response message to the terminal device by using the transceiver 1002, where the random access response message includes information for indicating an optimal uplink beam of the terminal device.
  • the information for indicating the optimal uplink beam of the terminal device includes: a time slot resource and/or a sub-band resource used by the terminal device to send a random access preamble on the best uplink beam; and/or an optimal uplink.
  • the identification of the beam includes: a time slot resource and/or a sub-band resource used by the terminal device to send a random access preamble on the best uplink beam; and/or an optimal uplink. The identification of the beam.
  • the processor 1001 may further match the preset synchronization signal block time index and the random access preamble after the transceiver 1002 receives the random access preamble sent by the terminal device on the multiple uplink beams. Corresponding relationship, determining a synchronization signal block time index corresponding to the received random access preamble, and determining a downlink beam for transmitting the synchronization signal block carrying the synchronization signal block time index as an optimal downlink beam.
  • the correspondence between the synchronization signal block time index and the random access preamble may be preset to one of the following correspondences: at least one synchronization signal block time index is in one-to-one correspondence with at least one random access preamble; or at least one synchronization The signal block time index is in one-to-one correspondence with at least one random access preamble group, and each random access preamble group includes a plurality of random access preambles.
  • the transceiver 1001 when the processor 1001 receives the random access preamble sent by the terminal device on the multiple uplink beams, the transceiver 1001 is specifically configured to: the receiving terminal device uses different resources on multiple uplink beams.
  • the random access preamble transmitted, the different resources include different time slot resources and/or different sub-band resources.
  • the processor 1001 may further send, by using the transceiver 1002, resource configuration information, resource configuration information, to the terminal device before receiving the random access preamble sent by the terminal device on the multiple uplink beams by using different resources. It is used to indicate different resources used by the terminal device to transmit a random access preamble on multiple uplink beams.
  • the processor 1001 may further send carrier configuration information to the terminal device by using the transceiver 1002 after receiving the random access preamble sent by the terminal device on the multiple uplink beams, where the carrier configuration information is used to indicate
  • the carrier used by the terminal device to send subsequent uplink messages in the initial access process is a single carrier or multiple carriers.
  • the carrier configuration information includes a direct indication of a single carrier or multiple carriers; or the carrier configuration information includes a time advance threshold.
  • the time advance threshold is used by the terminal device to determine a subsequent uplink message sent by the terminal device in the initial access process. Carrier.
  • the processor 1001 may further send the terminal device to the terminal device multiple times in a random access response message window after receiving the random access preamble sent by the terminal device on the multiple uplink beams. Random access response message.
  • the processor 1001, the transceiver 1002, and the memory 1003 are connected to each other through a bus; the bus may be a PCI bus or an EISA bus or the like.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1001 and various circuits of memory represented by memory 1003.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 1002 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1003 can store data used by the processor 1001 in performing operations.
  • the processor 1001 may be a central processing unit, an ASIC, an FPGA, or a CPLD.
  • the embodiment of the present application further provides a computer storage medium, where the software program stores a software program, and when the software program is read and executed by one or more processors, the initial connection performed by the terminal device in the foregoing embodiment may be implemented.
  • the method, or the software program, when read and executed by one or more processors, implements an initial access method performed by the network device in the above embodiments.
  • An embodiment of the present application further provides an initial access device, where the device includes a chip, and the chip is used to execute a method performed by a terminal device in the initial access method, where the chip performs the initial process by using a transceiver (or a communication module).
  • a method for receiving data and/or data by a terminal device in an access method, or a method for the network device to perform the foregoing initial access method, the chip performing the foregoing initial access method by using a transceiver (or a communication module) A method by which a network device receives data and/or data.
  • the embodiment of the present application provides a computer program product including instructions, when it is run on a computer, so that the computer can perform the initial access method performed by the terminal device in the above embodiment, or enable the computer to execute the network in the above embodiment.
  • the initial access method performed by the device is not limited to the above embodiment.
  • the embodiment of the present application further provides a communication system.
  • the communication system includes a terminal device 1101 and a network device 1102.
  • the terminal device 1101 is configured to perform the method performed by the terminal device in the method provided by the embodiment corresponding to FIG. 2, where the terminal device 1101 may be the same device as the terminal device shown in FIG. 7 or FIG. 8; the network device 1102 is configured to execute The method provided by the network device in the method provided in the embodiment of the present invention, the network device 1102 may be the same device as the network device shown in FIG. 9 or FIG. 10; Initial access method.

Landscapes

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

Abstract

一种初始接入方法及设备，用以解决现有的终端设备初始接入的技术方案存在的终端设备初始接入过程时间较长的问题。方法包括：终端设备在多个上行波束上向网络设备发送随机接入前导码；网络设备从在多个上行波束上接收的随机接入前导码中筛选出信号质量最好的随机接入前导码，并将网络设备接收信号质量最好的随机接入前导码的上行波束确定为终端设备的最佳上行波束，以使得终端设备后续每次都可以在该最佳上行波束上向网络设备发送初始接入过程中的后续其他上行消息。

Description

一种初始接入方法及设备
本申请要求于2017年05月12日提交中国专利局、申请号为201710335825.2、申请名称为“一种上行前导码的发送方法和设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种初始接入方法及设备。
背景技术
在现有的终端设备初始接入的技术方案中，终端设备会多次向网络设备发送初始接入过程中的上行消息，例如初始接入过程中的上行消息可以是随机接入前导码、调度传输消息(message 3)等。
在现有的终端设备的初始接入过程中，终端设备每次向网络设备发送初始接入过程中的上行消息时，终端设备都会在一个方向的上行波束上向网络设备发送初始接入过程中的上行消息，因此网络设备每次都需要通过波束扫描来接收终端设备发送的初始接入过程中的上行消息。即网络设备每次都需要在各个方向的上行波束上检测是否存在终端设备发送的初始接入过程中的上行消息，若网络设备在一个方向的上行波束上检测到终端设备发送的初始接入过程中的上行消息，则网络设备在该方向的上行波束上接收终端设备发送的初始接入过程中的上行消息。由于终端设备的初始接入过程中网络设备需要多次接收终端设备发送的上行消息，网络设备每次接收终端设备发送的初始接入过程中的上行消息之前都需要进行波束扫描，每次波束扫描的过程会消耗一定时间，因此终端设备的初始接入过程中网络设备多次接收终端设备发送的上行消息的过程会消耗较长时间，进而导致终端设备的初始接入过程时间较长。
综上所述，现有的终端设备初始接入的技术方案中存在终端设备的初始接入过程时间较长的问题。
发明内容
本申请实施例提供一种初始接入方法及设备，用以解决现有的终端设备初始接入的技术方案中存在的终端设备的初始接入过程时间较长的问题。
第一方面，本申请实施例提供一种初始接入方法，包括：
终端设备在多个上行波束上向网络设备发送随机接入前导码，网络设备接收终端设备在多个上行波束上发送的随机接入前导码之后，从在多个上行波束上接收的随机接入前导码中筛选出信号质量最好的随机接入前导码，并将网络设备接收该信号质量最好的随机接入前导码的上行波束确定为终端设备的最佳上行波束。
其中，最佳上行波束用于终端设备在该最佳上行波束上向网络设备发送初始接入过程中后续的其他上行消息。多个上行波束具有不同的波束方向，以实现终端设备将随机接入前导码在不同波束方向上向网络设备进行发送。
上述方法中，终端设备在多个上行波束上向网络设备发送初始接入过程中的第一个上行消息，即随机接入前导码，网络设备在接收到终端设备在多个上行波束上发送的随机接 入前导码后，可以从多个上行波束中筛选出发送信号质量最好的随机接入前导码的上行波束，并将该上行波束确定为最佳上行波束，以便终端设备后续每次都可以在该最佳上行波束上向网络设备发送初始接入过程中的后续其他上行消息。相较于现有的终端设备的初始接入过程，上述方法可以避免网络设备每次接收初始接入过程中的上行消息之前都需要进行波束扫描的问题，有助于减少网络设备每次接收初始接入过程中的上行消息的过程所消耗的时间，进而可以减少终端设备初始接入过程的时间，从而可以降低终端设备的初始接入过程的时延。
在一种实现方式中，网络设备接收终端设备在多个上行波束上发送的随机接入前导码之前，网络设备根据多个同步信号块携带的同步信号块时间索引，在不同的下行波束上向终端设备发送多个同步信号块，其中同步信号块时间索引用于指示携带该同步信号块时间索引的同步信号块在多个同步信号块中被发送的时间顺序。终端设备可以接收网络设备在不同的下行波束上向终端设备发送的多个同步信号块中的一个同步信号块，该同步信号块可以为终端设备首次接收的同步信号块，然后通过匹配预设的同步信号块时间索引和随机接入前导码的对应关系，来确定接收同步信号块的同步信号块时间索引对应的随机接入前导码，该确定的随机接入前导码为终端设备在多个上行波束上向网络设备发送的随机接入前导码。网络设备接收终端设备在多个上行波束上发送的随机接入前导码之后，网络设备可以通过匹配预设的同步信号块时间索引与随机接入前导码的对应关系，确定接收的随机接入前导码对应的同步信号块时间索引，并将用于发送携带有该同步信号块时间索引的同步信号块的下行波束确定为最佳下行波束。
通过上述实现方式，终端设备可以根据接收的同步信号块确定该终端设备在多个上行波束上发送的随机接入前导码，从而网络设备可以根据接收的随机接入前导码和预设的同步信号块时间索引与随机接入前导码的对应关系来确定最佳下行波束，以便网络设备可以在该最佳下行波束上向该终端设备发送初始接入过程中后续的下行消息。相较于现有的终端设备的初始接入过程，这种实现方式可以减少终端设备每次接收初始接入过程中后续的下行消息所消耗的时间，从而进一步地减少终端设备的初始接入过程的时间。
相应地，在一种实现方式中，同步信号块包含主同步信号、辅同步信号、参考信号以及物理广播信道(physical broadcast channel，PBCH)，可以在PBCH中携带同步信号块时间索引。其中参考信号包括但不限于解调参考信号(demodulation reference signal，DMRS)。在PBCH中携带同步信号块时间索引的方法有多种，本实施例并不限定。下面以比特序列来表示同步信号块时间索引为例来说明在PBCH中携带同步信号块时间索引的方法：在一种实现方式中，可以在PBCH中携带用于表示同步信号块时间索引的比特序列包括的全部比特。在另一种实现方式中，可以在PBCH中携带用于表示同步信号块时间索引的比特序列包括的部分比特，在该同步信号块包括的其它部分中携带比特序列包括的其他部分比特，该同步信号块包括的其它部分包括但不限于同步信号块包括的DMRS，该其他部分比特是指比特序列中除PBCH携带的部分比特之外的比特。
在一种实现方式中，可以将同步信号块时间索引与随机接入前导码的对应关系预先设置为如下两种方式中的一种：
第一种：至少一个同步信号块时间索引与至少一个随机接入前导码一一对应。
第二种：至少一个同步信号块时间索引与至少一个随机接入前导码组一一对应，每个随机接入前导码组包括多个随机接入前导码。
在一种实现方式中，网络设备接收终端设备在多个上行波束上发送的随机接入前导码之后，向终端设备发送随机接入响应消息，该随机接入响应消息包括用于指示终端设备的最佳上行波束的信息。终端设备可以接收网络设备发送的随机接入响应消息，以便该终端设备后续每次都可以在该最佳上行波束上向网络设备发送初始接入过程中的后续其他上行消息。
其中，用于指示终端设备的最佳上行波束的信息包括但不限于以下信息中的一种或组合：该终端设备在最佳上行波束上发送随机接入前导码时所采用的时隙资源，该终端设备在最佳上行波束上发送随机接入前导码时所采用的子带资源，最佳上行波束的标识。
在一种实现方式中，终端设备采用不同的资源在多个上行波束上向网络设备发送随机接入前导码，网络设备可以接收到该终端设备采用不同的资源在多个上行波束上发送的随机接入前导码，不同的资源包括不同的时域资源和/或不同的频域资源。
其中，不同的资源与多个上行波束存在的对应关系，该时域资源包括但不限于时隙资源、时域符号等，该频域资源包括但不限于子带资源、频点资源等，一个子带资源可以包括多个物理资源块(physical resource block，PRB)。
通过这种实现方式，网络设备接收到终端设备采用不同的资源在多个上行波束上发送的随机接入前导码后，可以将终端设备在最佳上行波束上发送随机接入前导码时采用的资源作为用于指示最佳上行波束的信息。
在一种实现方式中，网络设备接收终端设备采用不同的资源在多个上行波束上发送的随机接入前导码之前，网络设备向终端设备发送资源配置信息，终端设备可以接收网络设备发送的资源配置信息，以便终端设备可以根据该资源配置信息配置在多个上行波束上发送随机接入前导码时采用的资源，该资源配置信息用于指示终端设备在多个上行波束上发送随机接入前导码时采用的不同的资源。在另一种可能的实现方式中，终端设备采用不同的资源在多个上行波束上向网络设备发送随机接入前导码之前，终端设备预配置资源配置信息。
通过上述两种实现方式，终端设备可以配置在多个上行波束上发送随机接入前导码时采用的资源，以便终端设备采用不同的资源在多个上行波束上向网络设备发送随机接入前导码。
在一种实现方式中，网络设备向终端设备发送载波配置信息，终端设备接收网络设备发送的载波配置信息，该载波配置信息用于指示终端设备发送初始接入过程中后续的上行消息时采用的载波为单载波或多载波。
上述实现方式中，终端设备根据载波配置信息确定该终端设备发送初始接入过程中后续的上行消息时采用的载波的实现方式包括但不限于以下两种：
方式一：载波配置信息包括直接指示单载波或多载波，终端设备可以根据接收的网络设备发送的载波配置信息来直接确定在发送初始接入过程中后续的上行消息时所采用的载波。
方式二：载波配置信息包括时间提前量阈值，该时间提前量阈值用于终端设备确定该终端设备发送初始接入过程中后续的上行消息时采用的载波。网络设备向终端设备发送包括的时间提前量的随机接入响应消息和包括时间提前量阈值的载波配置信息，终端设备接收网络设备发送包括的时间提前量的随机接入响应消息和包括时间提前量阈值的载波配置信息后，可以将时间提前量与时间提前量阈值进行比较，确定该终端设备在发送 随机接入前导码时所采用的载波。若时间提前量大于或等于时间提前量阈值，则终端设备将该终端设备向网络设备发送初始接入过程中后续的上行消息时所采用的载波确定为单载波，这样有助于增强终端设备用于发送初始接入过程中后续的上行消息的上行波束的传输性能，使该初始接入过程中后续的上行消息的信号质量更好；若时间提前量小于时间提前量阈值，则终端设备将该终端设备向网络设备发送初始接入过程中后续的上行消息时所采用的载波确定为多载波，有助于提高终端设备数据发送速率，节省终端设备的发送功率。
通过上述两种实现方式，终端设备可以确定在发送后续的初始接入过程中后续的上行消息时采用的载波，以便终端设备采用确定的载波向网络设备发送后续的初始接入过程中后续的上行消息。
在一种实现方式中，网络设备接收终端设备在多个上行波束上发送的随机接入前导码之后，在一个随机接入响应消息窗内多次向终端设备发送随机接入响应消息。
相较于现有的终端设备的初始接入过程中网络设备在一个随机接入响应消息窗内向终端设备发送一次随机接入响应消息的技术方案，这种实现方式可以保证终端设备在正确的随机接入响应消息窗内接收网络设备发送的随机接入响应消息。
第二方面，本申请实施例提供的一种终端设备，该终端设备具有实现上述第一方面方法示例中终端设备行为的功能。所述终端设备的结构中包括处理单元和收发单元；处理单元，通过所述收发单元执行上述第一方面的任意一种实现方式提供的方法；收发单元，用于接收数据和/或发送数据。
第三方面，本申请实施例提供的一种网络设备，该网络设备具有实现上述第一方面方法示例中网络设备行为的功能。所述网络设备的结构中包括处理单元和收发单元；处理单元，通过所述收发单元执行上述第二方面的任意一种实现方式提供的方法；收发单元，用于接收数据和/或发送数据。
第四方面，本申请实施例还提供了一种终端设备，该终端设备具有实现上述第一方面方法示例中终端设备行为的功能。所述终端设备的结构中包括存储器、处理器以及收发机；存储器，用于存储计算机可读程序；收发机，用于在处理器的控制下接收数据和/或发送数据；处理器，调用存储在存储器中的指令，通过所述收发机执行上述第一方面的任意一种实现方式提供的方法。
第五方面，本申请实施例还提供了一种网络设备，该网络设备具有实现上述第一方面方法示例中网络设备行为的功能。所述网络设备的结构中包括存储器、处理器以及收发机；存储器，用于存储计算机可读程序；收发机，用于在处理器的控制下接收数据和/或发送数据；处理器，调用存储在存储器中的指令，通过所述收发机执行上述第一方面的任意一种实现方式提供的方法。
第六方面，本申请实施例中还提供一种计算机存储介质，该存储介质中存储软件程序，该软件程序在被一个或多个处理器读取并执行时可以实现第一方面或上述第一方面的任意一种实现方式提供的方法。
第七方面，本申请实施例中还提供了一种初始接入装置，该装置包括芯片，该芯片可以用于执行第一方面或上述第一方面的任意一种实现方式提供的方法，该芯片通过收发机(或通信模块)执行第一方面或上述第一方面的任意一种实现方式中终端设备所执行的方法，或者该芯片也可以通过收发机(或通信模块)执行第一方面或上述第一方面的任意一 种实现方式中网络设备所执行的方法。
第八方面，本申请实施例还提供了一种通信系统，该通信系统包括终端设备和网络设备。其中，终端设备和网络设备配合可以执行上述第一方面或上述第一方面的任意一种实现方式提供的方法。
附图说明
图1为本申请实施例提供的一种网络架构的架构示意图；
图2为本申请实施例提供的一种初始接入的方法流程示意图；
图3A为本申请实施例提供的第一种时隙资源和子带资源的结构示意图；
图3B为本申请实施例提供的第二种时隙资源和子带资源的结构示意图；
图3C为本申请实施例提供的第三种时隙资源和子带资源的结构示意图；
图4为本申请实施例提供的一种确定随机接入前导码的方法流程示意图；
图5A为本申请实施例提供的一种同步信号块突发集合的结构示意图；
图5B为本申请实施例提供的另一种同步信号块突发集合的结构示意图；
图6为本申请实施例提供的一种确定最佳下行波束的方法流程示意图；
图7为本申请实施例提供的一种终端设备的结构示意图；
图8为本申请实施例提供的另一种终端设备的结构示意图；
图9为本申请实施例提供的一种网络设备的结构示意图；
图10为本申请实施例提供的另一种网络设备的结构示意图；
图11为本申请实施例提供的一种通信系统的结构示意图。
具体实施方式
终端设备的初始接入过程主要包括初始同步和小区搜索过程、网络设备向终端设备下发包括随机接入资源的系统配置信息、随机接入过程等几个步骤。在初始同步和小区搜索的过程中，网络设备会在下行波束上向终端设备发送同步信号等下行消息。在初始同步和小区搜索的过程中，网络设备会在下行波束上向终端设备发送系统配置信息等下行消息。在随机接入过程中，终端设备会在上行波束上向网络设备发送随机接入前导码、message 3等初始接入过程中的上行消息，网络设备会在下行波束上向终端设备发送随机接入响应等下行消息。
在现有的终端设备的初始接入过程中，终端设备会向网络设备多次发送初始接入过程中的上行消息。终端设备每次向网络设备发送初始接入过程中的上行消息时，终端设备都会在一个方向的上行波束上向网络设备发送初始接入过程中的上行消息，因此网络设备每次都需要通过波束扫描来接收终端设备发送的初始接入过程中的上行消息。网络设备每次接收初始接入过程中的上行消息的过程包括：网络设备在各个方向的上行波束上检测是否存在终端设备发送的初始接入过程中的上行消息，若网络设备在一个方向的上行波束上检测到终端设备发送的初始接入过程中的上行消息，则网络设备在该方向的上行波束上接收终端设备发送的初始接入过程中的上行消息。由于终端设备的初始接入过程中网络设备需要多次接收终端设备发送的上行消息，网络设备每次接收终端设备发送的初始接入过程中的上行消息之前都需要进行波束扫描，每次波束扫描的过程会消耗一定时间，因此终端设 备的初始接入过程中网络设备多次接收终端设备发送的上行消息的过程会消耗较长时间，进而导致终端设备的初始接入过程时间较长。
为了现有的终端设备初始接入的技术方案中存在的终端设备的初始接入过程时间较长的问题，本申请实施例提供一种初始接入方法及设备，终端设备在多个上行波束上向网络设备发送初始接入过程中的第一个上行消息，即随机接入前导码，网络设备接收到终端设备在多个上行波束上发送的随机接入前导码后，从多个上行波束中筛选出发送信号质量最好的随机接入前导码的上行波束，将该上行波束确定为最佳上行波束，以便终端设备后续每次都可以在该最佳上行波束上向网络设备发送初始接入过程中的后续其他上行消息。相较于现有的终端设备的初始接入过程，上述方法可以避免网络设备每次接收初始接入过程中的上行消息之前都需要进行波束扫描的问题，有助于减少网络设备每次接收初始接入过程中的后续其他上行消息的过程所消耗的时间，进而可以减少终端设备的初始接入过程的时间，从而可以降低终端设备的初始接入过程的时延。其中，方法和设备是基于同一构思，由于方法和设备解决问题的原理相似，因此方法和设备的实施可以相互参见，重复之处不再赘述。
本申请实施例提供的技术方案可以适用于多种系统，例如适用的系统可以是全球移动通讯(global system of mobile communication，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)通用分组无线业务(general packet radio service，GPRS)系统、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)系统以及5G系统等。这多种系统中均包括终端设备和网络设备。
本申请实施例提供的技术方案适用于终端设备进行初始接入的场景。以图1所示的一种网络架构示意图为例，图1中涉及终端设备101和网络设备102，图1中仅示出两个终端设备101和一个网络设备102，实际应用中终端设备101和网络设备102均可以为一个或多个。其中，终端设备101在网络设备102的覆盖范围内进行初始接入，网络设备102与终端设备101之间进行交互。本申请实施例提供的技术方案尤其适用于终端设备进行初始接入的过程中终端设备的随机接入的场景，在此场景下，由于图1中网络设备102需要接收终端设备101发送的初始接入过程中的上行消息，例如初始接入过程中的上行消息可以是随机接入前导码、message 3等，而在初始接入过程中随机接入前导码往往是最先发送的的上行消息。
本申请实施例涉及的终端设备，可以是指向用户提供语音和/或数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。在不同的系统中，终端设备的名称可能也不相同，例如终端设备可以称为用户设备(user equipment，UE)。无线终端设备可以经RAN与一个或多个核心网进行通信，无线终端设备可以是移动终端设备，如移动电话(或称为“蜂窝”电话)和具有移动终端设备的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiated protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)等设备。无线终端设备也可以 称为系统、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户装置(user device)，本申请实施例中并不限定。
本申请实施例涉及的网络设备可以是指接入点，或者基站，或者接入网中在空中接口上通过一个或多个扇区与无线终端设备通信的设备，或者其它名称。网络设备可用于将收到的空中帧与网际协议(internet protocol，IP)分组进行相互转换，作为无线终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)通信网络。网络设备还可协调对空中接口的属性管理。例如，本申请实施例涉及的网络设备可以是GSM或CDMA中的网络设备(base transceiver station，BTS)，也可以是WCDMA中的网络设备(NodeB)，还可以是LTE系统中的演进型网络设备(evolutional node B，eNB或e-NodeB)、5G网络架构(next generation system)中的5G基站，也可是家庭演进基站(home evolved node B，HeNB)、中继节点(relay node)、家庭基站(femto)、微微基站(pico)等，本申请实施例中并不限定。
下面详细介绍本申请实施例提供的技术方案。
本申请实施例提供了一种初始接入方法，该方法中涉及终端设备和网络设备。如图2示出一种初始接入的方法流程示意图，图2中终端设备与网络设备之间的交互过程如下：
S201、终端设备在多个上行波束上向网络设备发送随机接入前导码。
其中，多个上行波束具有不同的波束方向，以实现终端设备将随机接入前导码在不同波束方向上向网络设备进行发送。进一步的，多个上行波束具有的不同的波束方向包括整个小区的所有波束方向，以便减少网络设备接收终端设备发送的随机接入前导码时所耗费的时间。
S201中，终端设备在多个上行波束上发送的随机接入前导码可以是相同的随机接入前导码，也可以是不同的随机接入前导码，本实施例中不作限定。
在一种实现方式中，S201中终端设备采用不同的资源在多个上行波束上向网络设备发送随机接入前导码，其中该资源包括时域资源和/或频域资源，例如该时域资源可以包括时隙资源，该频域资源可以包括子带资源。终端设备确定在多个上行波束上发送随机接入前导码时采用的资源可以有多种方法，一种方法为：在S201之前，终端设备接收网络设备发送的资源配置信息，并根据资源配置信息配置在多个上行波束上发送随机接入前导码时采用的资源，网络设备侧的方法会在S202中描述。另一种方法为：终端设备预配置资源配置信息。该资源配置信息用于指示终端设备在多个上行波束上发送随机接入前导码时采用的资源。
本实施例中，终端设备在多个上行波束上发送随机接入前导码时采用的资源所采用的方式包括但不限于以下几种：
方式一：终端设备在多个上行波束上发送随机接入前导码时采用的资源包括一个时隙资源和多个子带资源，其中多个子带资源与不同的上行波束存在一对一或者一对多的对应关系。
以多个子带资源与不同的上行波束存在一对一的对应关系为例，假设子带资源包括子带1、子带2、子带3和子带4，上行波束为波束A、波束B、波束C和波束D，时隙资源为时隙T。则终端设备采用时隙T和子带1在波束A上发送随机接入前导码，采用时隙T 和子带2在波束B上发送随机接入前导码，采用时隙T和子带3在波束C上发送随机接入前导码，采用时隙T和子带4在波束D上发送随机接入前导码，如图3A所示。
方式二：终端设备在多个上行波束上发送随机接入前导码时采用的资源包括多个时隙资源和多个子带资源，其中多个时隙资源与不同的上行波束存在一对一或者一对多的对应关系，多个子带资源与不同的上行波束也存在一对一或者一对多的对应关系。
以多个时隙资源与不同的上行波束存在一对多的对应关系，并且多个子带资源与不同的上行波束存在一对一的对应关系为例，假设子带资源包括子带1、子带2、子带3和子带4，上行波束为波束A、波束B、波束C和波束D，时隙资源为时隙T1和时隙T2。则终端设备采用时隙T1和子带1在波束A上发送随机接入前导码，采用时隙T2和子带2在波束B上发送随机接入前导码，采用时隙T1和子带3在波束C上发送随机接入前导码，采用时隙T2和子带4在波束D上发送随机接入前导码，如图3B所示。
以多个子带资源与不同的上行波束存在一对一的对应关系，并且多个时隙资源与不同的上行波束存在一对一的对应关系为例，假设子带资源包括子带1、子带2、子带3和子带4，上行波束包括波束A、波束B、波束C和波束D，时隙资源包括时隙T1、时隙T2、时隙T3和时隙T4。则终端设备采用时隙T1和子带1在波束A上发送随机接入前导码，采用时隙T2和子带2在波束B上发送随机接入前导码，采用时隙T3和子带3在波束C上发送随机接入前导码，采用时隙T4和子带4在波束D上发送随机接入前导码，如图3C所示。
需要说明的是，上述内容仅为S201中终端设备在多个上行波束上发送随机接入前导码时采用的资源可能采用的两种方式，本实施例中并不限定该资源采用其他形式。
通过上述实现方式，终端设备获得资源配置信息后，可以根据该资源配置信息配置在多个上行波束上发送随机接入前导码时采用的资源，以便网络设备可以基于终端设备发送随机接入前导码时采用的资源来指示终端设备的最佳上行波束，网络设备指示终端设备的最佳上行波束的方法会在S203中描述。
S202、网络设备接收终端设备在多个上行波束上发送的随机接入前导码之后，从在多个上行波束上接收的随机接入前导码中筛选出信号质量最好的随机接入前导码，并将用于网络设备接收信号质量最好的随机接入前导码的上行波束确定为终端设备的最佳上行波束。
其中，最佳上行波束用于终端设备在该最佳上行波束上向网络设备发送初始接入过程中的后续其他上行消息，例如初始接入过程中的后续其他上行消息包括初始接入过程中的message 3等消息。
S202中，在网络设备在多个上行波束上接收到终端设备发送的随机接入前导码的数量为多个的情况下，网络设备可以对在多个上行波束上接收到的多个随机接入前导码的信号质量进行比较，例如随机接入前导码的信号质量可以为随机接入前导码的信号强度，从多个随机接入前导码中筛选出信号质量最好的随机接入前导码，将用于该网络设备接收该信号质量最好的随机接入前导码的上行波束确定为终端设备的最佳上行波束。网络设备在多个上行波束上接收到终端设备发送的随机接入前导码的数量为一个，在此情况下网络设备可以将用于该网络设备接收该随机接入前导码的上行波束确定为终端设备的最佳上行波束。需要说明的是，网络设备对在多个上行波束上接收到的多个随机接入前导码的信号质量进行比较的方法与现有技术类似，此处不再赘述。
在一种实现方式中，在S202之前，网络设备可以向终端设备发送资源配置信息，例如该资源配置信息可以携带在无线资源控制消息(radio resource control，RRC)中，或者该资源配置信息可以携带在网络设备通过媒体接入控制层控制单元(media access control control elements，MAC CE)生成的资源配置消息中。终端设备接收网络设备发送的资源配置信息之后，终端设备根据资源配置信息配置在多个上行波束上发送随机接入前导码时采用的资源的方法可参见S201中的相关描述，此处不再赘述。
S203、网络设备确定终端设备的最佳上行波束后，向终端设备发送随机接入响应消息，该随机接入响应消息包括用于指示最佳上行波束的信息。
本实施例中，用于指示终端设备的最佳上行波束的信息可以包括终端设备在最佳上行波束上发送随机接入前导码时采用的资源、最佳上行波束的标识等信息中的一种或多种，其中该资源包括时隙资源和/或子带资源。在一种实现方式中，由于S201中终端设备采用不同的资源在多个上行波束上向网络设备发送随机接入前导码，不同的资源与多个上行波束存在的对应关系，因此S203中网络设备可以将终端设备在最佳上行波束上发送随机接入前导码时采用的资源作为用于指示最佳上行波束的信息，使得S203中终端设备在接收到网络设备发送的随机接入响应消息后可以通过匹配不同的资源与多个上行波束存在的对应关系，将该随机接入响应消息包括的该终端设备在最佳上行波束上发送随机接入前导码时采用的资源对应的上行波束确定为最佳上行波束。
S203中，网络设备通过随机接入响应消息向终端设备指示该终端设备的最佳上行波束，使得终端设备可以在该最佳上行波上向网络设备发送初始接入过程中的后续其他上行消息，这样网络设备每次接收终端设备发送的初始接入过程中的后续其他上行消息时无需重新进行波束扫描就能够接收到终端设备发送的初始接入过程中的后续其他上行消息，有助于减少网络设备每次接收初始接入过程中的上行消息的过程所消耗的时间，进而可以减少终端设备初始接入过程的时间，从而可以降低终端设备的初始接入过程的时延。
在现有的终端设备初始接入的技术方案中，网络设备在一个随机接入响应消息窗内向终端设备发送一个随机接入响应消息，由于终端设备接收网络设备发送的随机接入响应消息之前都需要进行波束扫描，波束扫描的过程可能会消耗较长时间，导致终端设备在错误的随机接入响应消息窗内接收网络设备发送的随机接入响应消息，甚至导致终端设备的初始接入过程失败。而在网络设备和终端设备所在的系统为5G NR系统的情况下，由于5GNR系统在高频环境下稳定性较差，更易导致终端设备在错误的随机接入响应消息窗内接收网络设备发送的随机接入响应消息，也更易导致终端设备的初始接入过程失败。
基于上述问题，为了保证终端设备在正确的随机接入响应消息窗内接收网络设备发送的随机接入响应消息，S203中网络设备在一个随机接入响应消息窗内可以多次向终端设备发送随机接入响应消息，使得终端设备在一个随机接入响应消息窗内可以接收到网络设备发送的多个随机接入响应消息，终端设备可以对接收到的多个随机接入响应消息进行合并处理，或者终端设备可以在每次接收到网络设备发送的随机接入响应消息后对接收到的随机接入响应消息进行译码，若译码成功则终端设备在一个随机接入响应消息窗内停止接收随机接入响应消息，以减少终端设备接收随机接入响应消息所消耗的功率。
在一种实现方式中，在S203之前，网络设备可以向终端设备发送载波配置信息载波配置信息，该载波配置信息载波配置信息用于指示终端设备在多个上行波束上发送随机接入前导码时采用的载波为单载波(DFT-S-OFDM)或多载波(CP-OFDM)，例如该载波配 置信息载波配置信息可以携带在RRC中，或者该载波配置信息载波配置信息可以携带在网络设备通过MAC CE生成的载波配置消息中。终端设备接收网络设备发送的载波配置信息载波配置信息之后，终端设备根据载波配置信息载波配置信息配置发送初始接入过程中后续的时采用的载波的方法会在下文中描述。
在S203后，终端设备可以在最佳上行波束上向网络设备发送初始接入过程中的后续其他上行消息。在一种实现方式中，终端设备可以根据S202中网络设备下发的载波配置消息来配置该终端设备发送初始接入过程中后续的上行消息时采用的载波为DFT-S-OFDM或CP-OFDM。终端设备确定该终端设备发送初始接入过程中后续的上行消息时采用的载波方法可以有多种，其中一种方法为：在S203之前，终端设备可以接收网络设备发送的载波配置信息，该载波配置信息用于指示终端设备发送初始接入过程中后续的上行消息时采用的载波为DFT-S-OFDM或CP-OFDM，终端设备根据接收的载波配置信息来确定该终端设备发送初始接入过程中后续的上行消息时采用的载波，网络设备侧的方法参见上文中网络设备可以向终端设备发送载波配置信息的方法，此处不再赘述。
本实施例中，载波配置信息的实现方式包括但不限于以下几种：
方式一：载波配置信息包括直接指示终端设备发送初始接入过程中后续的上行消息时采用的载波为DFT-S-OFDM或CP-OFDM。在这种方式下，终端设备可以根据接收的网络设备发送的载波配置信息来直接确定发送初始接入过程中的后续其他上行消息时所采用的载波。
方式二：载波配置信息包括时间提前量阈值，该时间提前量阈值可以用于终端设备确定该终端设备发送初始接入过程中后续的上行消息时采用的载波。在一种实现方式中，在S201之前，终端设备可以接收网络设备发送的随机接入响应消息包括的时间提前量和载波配置信息包括的时间提前量阈值，终端设备将时间提前量与时间提前量阈值进行比较，确定该终端设备在发送初始接入过程中的后续其他上行消息时所采用的载波。若时间提前量大于或等于时间提前量阈值，则说明终端设备与网络设备之间的距离较大，因此终端设备将该终端设备向网络设备发送初始接入过程中的后续其他上行消息时所采用的载波确定为DFT-S-OFDM，以增强用于发送初始接入过程中的后续其他上行消息的上行波束的传输性能，使初始接入过程中的后续其他上行消息的信号质量更好；若时间提前量小于时间提前量阈值，则说明终端设备与网络设备之间的距离较小，因此终端设备将该终端设备向网络设备发送初始接入过程中的后续其他上行消息时所采用的载波确定为CP-OFDM，以提高终端的数据发送速率，节省终端设备的发送功率。
通过上述两种方式，终端设备可以通过载波配置信息确定该终端设备发送初始接入过程中后续的上行消息时采用的载波，从而增强终端设备用于发送初始接入过程中的后续其他上行消息的上行波束的性能。
在一种实现方式中，S201之前终端设备可以确定在多个上行波束上向网络设备发送的随机接入前导码。如图4示出一种确定随机接入前导码的方法流程示意图，图4中终端设备与网络设备之间的交互过程如下：
S401、网络设备根据多个同步信号块携带的同步信号块时间索引，在不同的下行波束上向终端设备发送多个同步信号块。
本实施例中，同步信号块时间索引用于指示携带该同步信号块时间索引的同步信号块在多个同步信号块中被发送的时间顺序，该同步信号块用于终端设备根据接收到的一个同 步信号块携带的同步信号块时间索引确定该终端设备在多个上行波束上发送的随机接入前导码。举例说明，假设存在4个同步信号块，分别为携带同步信号块时间索引1的同步信号块A、携带同步信号块时间索引2的同步信号块B、携带同步信号块时间索引3的同步信号块C、携带同步信号块时间索引4的同步信号块D，这4个同步信号块中每个同步信号块携带的同步信号块时间索引按照每个同步信号块时间索引所指示的被发送的时间顺序从先至后依次为同步信号块时间索引1、同步信号块时间索引2、同步信号块时间索引3、同步信号块时间索引4，则网络设备根据这4个同步信号块携带的同步信号块时间索引，在不同的下行波束上向终端设备发送这4个同步信号块的顺序从先至后依次为同步信号块A、同步信号块B、同步信号块C、同步信号块D。
同步信号块(synchronization signal block，SS Block)可以包括同步信号、参考信号和PBCH，可以在同步信号块包括的PBCH中携带同步信号块时间索引，这多个同步信号块中每个同步信号块携带的同步信号块时间索引均不相同。其中，同步信号包括主同步信号(primary synchronization signal，PSS)和辅同步信号(secondary synchronization signal，SSS)，参考信号包括但不限于DMRS。以比特序列来表示同步信号块时间索引为例，例如该比特序列包括两位比特，则比特序列分别为00、01、10、11时，分别表示该比特序列表示的同步信号块时间索引对应的同步信号块被发送的先后顺序依次为第一个发送、第二个发送、第三个发送、第四个发送。在一种实现方式中，可以在同步信号块包括的PBCH中携带用于表示同步信号块时间索引的比特序列包括的全部比特，例如比特序列为10，PBCH携带10。在另一种实现方式中，可以在同步信号块包括的PBCH中携带用于表示同步信号块时间索引的比特序列包括的部分比特，在该同步信号块包括的其它部分中携带比特序列包括的其他部分比特，该同步信号块包括的其它部分包括但不限于同步信号块包括的DMRS，该其他部分比特是指比特序列中除PBCH携带的部分比特之外的比特，例如比特序列为10，PBCH携带1，DMRS携带0。其中不同DMRS序列可以携带不同的比特序列。
在S401中，不同的下行波束具有不同的波束方向，网络设备可以根据多个同步信号块携带的同步信号块时间索引所指示的时间顺序，将同步信号块在不同的波束方向上发送给终端设备。进一步的，多个下行波束具有的不同的波束方向包括整个小区的所有波束方向，这样处于整个小区任意波束方向上的终端设备都可以接收到网络设备发送的同步信号块，进而整个小区任意波束方向上的终端设备都可以通过接收来自网络设备的同步信号块确定自身在多个上行波束上发送的随机接入前导码。
本实施例中，可以将多个同步信号块划分为多组，每组同步信号块称为一个同步信号块突发(synchronization signal block burst，SS Block Burst)，得到多个同步信号块突发。进一步的，可以将多个同步信号块突发划分为一组或多组，每组同步信号块突发称为一个同步信号块突发集合(synchronization signal block burst set，SS Block Burst Set)。举例说明，假设有多个同步信号块突发集合，每个同步信号块突发集合均包括2个同步信号块突发，每个同步信号块突发均包括12个同步信号块，S401中在1个帧(frame)的时间内，网络设备可以根据一个同步信号块突发包括的12个同步信号块携带的同步信号块时间索引，在不同的下行波束上向终端设备发送这12个同步信号块，在时长为T的时间段内，网络设备可以根据一个同步信号块突发集合包括的24个同步信号块携带的同步信号块时间索引，在不同的下行波束上向终端设备发送这24个同步信号块，如图5A所示。或者可 以将多个同步信号块突发划分为一组或多组，每组同步信号块突发称为一个同步信号块突发段(synchronization signal block burst period，SS Block Burst Period)，再将多个同步信号块突发段划分为一组或多组，每组同步信号块突发段称为一个同步信号块突发集合。其中一个同步信号块突发集合包括的各个同步信号块携带的同步信号块时间索引各不相同。举例说明，一个同步信号块突发集合包括4个同步信号块突发段，一个同步信号块突发段包括多个同步信号块突发，该多个同步信号块突发中的一个同步信号块突发包括携带同步信号块时间索引0的同步信号块A、携带同步信号块时间索引1的同步信号块B、携带同步信号块时间索引2的同步信号块C、携带同步信号块时间索引3的同步信号块D，这四个同步信号块中每个同步信号块均由14个子信号块组成，这四个同步信号块携带的同步信号块时间索引各不相同，如图5B所示。
在一种实现方式中，S401中用于网络设备发送一个同步信号突发包括的各个同步信号块的不同的下行波束为整个小区的所有波束方向上的下行波束，这样网络设备通过发送一个同步信号块突发可以完成对整个小区的一次波束扫描，网络设备通过发送一个同步信号块突发集合可以完成对整个小区的多次波束扫描。在另一种实现方式中，S401中用于网络设备发送一个同步信号突发集合包括的各个同步信号块的不同的下行波束为整个小区的所有波束方向上的下行波束，这样网络设备通过发送一个同步信号块突发集合可以完成对整个小区的一次波束扫描。相较于上文中网络设备通过发送一个同步信号块突发集合可以完成对整个小区的多次波束扫描的实现方式，这种网络设备通过发送一个同步信号块突发集合可以完成对整个小区的一次波束扫描的实现方式，可以减少同步信号块所携带的同步信号块时间索引所占用的编码位数，还可以使网络设备在更小的粒度上完成对整个小区的一次波束扫描，提高波束扫描的精度。
S402、终端设备接收网络设备在不同的下行波束上发送的多个携带有同步信号块时间索引的同步信号块中的一个同步信号块。
其中，该一个同步信号块可以为终端设备首次接收的同步信号块。
S401中网络设备在不同的下行波束上向终端设备发送多个携带有同步信号块时间索引的同步信号块，S402中终端设备可以接收网络设备发送的这多个同步信号块中的一个携带有同步信号块时间索引的同步信号块。在一种实现方式中，终端设备可以接收网络设备发送的一个携带有同步信号块时间索引的同步信号块，并在接收到该同步信号块后暂停接收网络设备后续发送的携带有同步信号块时间索引的同步信号块。在另一种实现方式中，终端设备可以接收网络设备发送的多个携带有同步信号块时间索引的同步信号块，并从接收到的多个同步信号块中筛选出一个信号质量最好的同步信号块。需要说明的是，终端设备还可以通过其他方式接收网络设备发送的一个携带有同步信号块时间索引的同步信号块，本实施例中并不限定。
S403、终端设备通过匹配预设的同步信号块时间索引和随机接入前导码的对应关系，确定接收的同步信号块携带的同步信号块时间索引对应的随机接入前导码。
S403中终端设备确定的随机接入前导码为图2所示的方法中S201中终端设备在多个上行波束上向网络设备发送的随机接入前导码。
本实施例中，预设的同步信号块时间索引与随机接入前导码的对应关系包括但不限于以下几种对应关系中的一种：
对应关系一：至少一个同步信号块时间索引与至少一个随机接入前导码一一对应。
在对应关系一中，终端设备在多个上行波束上发送的随机接入前导码是该终端设备接收到的同步信号块携带的同步信号块时间索引对应的一个随机接入前导码，此时终端设备在多个上行波束上发送的随机接入前导码是相同的随机接入前导码。举例说明，假设有N个同步信号块时间索引和N个随机接入前导码一一对应，其中N为大于0的整数，S403中预设的同步信号块时间索引与随机接入前导码的对应关系如下表1所示。
表1同步信号块时间索引与随机接入前导码的对应关系
同步信号块时间索引 随机接入前导码
同步信号块时间索引0 随机接入前导码0
同步信号块时间索引1 随机接入前导码1
…… ……
同步信号块时间索引N 随机接入前导码N
对应关系二：至少一个同步信号块时间索引与至少一个随机接入前导码组一一对应，至少一个随机接入前导码组中的每个随机接入前导码组包括多个随机接入前导码。
在对应关系二中，终端设备在多个上行波束上发送的随机接入前导码可以是该终端设备接收到的同步信号块携带的同步信号块时间索引对应的一个随机接入前导码组包括的多个随机接入前导码中的一个或多个，这样终端设备在多个上行波束上发送的各个随机接入前导码可以是相同或不同的随机接入前导码。举例说明，假设有M个同步信号块时间索引和M个随机接入前导码组一一对应，其中M为大于0的整数，S403中预设的同步信号块时间索引与随机接入前导码组的对应关系如下表2所示。
表2同步信号块时间索引与随机接入前导码组的对应关系
同步信号块时间索引 随机接入前导码组
同步信号块时间索引0 随机接入前导码组0
同步信号块时间索引1 随机接入前导码组1
…… ……
同步信号块时间索引M 随机接入前导码组M
S403中，终端设备可以通过匹配接收的同步信号块携带的同步信号块时间索引和预设的对应关系一或二来确定在多个上行波束上向网络设备发送的随机接入前导码。
在一种实现方式中，在S403之前，终端设备可以预先设置同步信号块时间索引与资源的对应关系，该同步信号块时间索引与资源的对应关系用于图2所示的方法中的S201中终端设备根据该同步信号块时间索引与资源的对应关系确定在多个上行波束上发送随机接入前导码时采用的资源。在这种实现方式中，图2所示的方法中的资源配置信息可以包括同步信号块时间索引与资源的对应关系。在一种实现方式中，S403中终端设备可以通过匹配接收的同步信号块携带的同步信号块时间索引和预先设置的同步信号块时间索引与资源的对应关系，确定图2所示的方法中的S201中该终端设备在多个上行波束上发送随机接入前导码时采用的不同的资源，其中该不同的资源包括不同的时域资源和/或不同的频域资源。
本实施例中，同步信号块时间索引与资源的对应关系包括但不限于以下几种对应关系中的一种或组合：
对应关系一：至少一个同步信号块时间索引与至少一个时域资源一一对应，该时域资源为终端设备发送随机接入前导码时所采用的时域资源，该时域资源包括但不限于时隙资源。
在对应关系一中，终端设备在多个上行波束上发送随机接入前导码时采用的时域资源可以是该终端设备接收到的同步信号块携带的同步信号块时间索引对应的时域资源。以时域资源为时隙资源为例，假设该终端设备接收到的同步信号块携带的同步信号块时间索引对应的时隙资源为时隙T，则终端设备采用时隙T在多个上行波束上发送随机接入前导码。举例说明，假设有K个同步信号块时间索引和K个时隙资源一一对应，其中K为大于0的整数，同步信号块时间索引与时隙资源的对应关系如下表3所示。
表3同步信号块时间索引与时隙资源的对应关系
同步信号块时间索引 时隙资源
同步信号块时间索引0 时隙0
同步信号块时间索引1 时隙1
…… ……
同步信号块时间索引K 时隙K
对应关系二：至少一个同步信号块时间索引与至少一个频域资源一一对应，该频域资源为终端设备发送随机接入前导码时所采用的频域资源，该频域资源包括但不限于频点资源、子带资源等，其中一个子带资源可以包括多个物理资源块。
在对应关系二中，终端设备在多个上行波束上发送随机接入前导码时所采用的频域资源，可以是该终端设备接收到的同步信号块携带的同步信号块时间索引对应的频域资源。举例说明，假设有Q个同步信号块时间索引和Q个子带资源一一对应，其中Q为大于0的整数，同步信号块时间索引与子带资源的对应关系如下表4所示。
表4同步信号块时间索引与子带资源的对应关系
同步信号块时间索引 子带资源
同步信号块时间索引0 子带0
同步信号块时间索引1 子带1
…… ……
同步信号块时间索引Q 子带Q
以频域资源为子带资源为例，假设该终端设备接收到的同步信号块携带的同步信号块时间索引对应的子带资源为子带A，则终端设备采用子带A在多个上行波束上发送随机接入前导码。以频域资源为子带资源组为例，假设该终端设备接收到的同步信号块携带的同步信号块时间索引对应的子带资源为子带A、子带B、子带C组成的资源组，则终端设备分别采用子带A在第一个上行波束上发送随机接入前导码，采用子带B在第二个上行波束上发送随机接入前导码，采用子带C在第三个上行波束上发送随机接入前导码。
通过上述图4所示的方法，终端设备可以确定该终端设备在多个上行波束上向网络设备发送的随机接入前导码，该随机接入前导码为在图2所示的方法中的S201中终端设备在多个上行波束上向网络设备发送的随机接入前导码。
本申请实施例提供的初始接入方法中，终端设备在多个上行波束上向网络设备发送随 机接入前导码，网络设备接收到随机接入前导码后从不同的上行波束中筛选出的发送信号质量最好的随机接入前导码的上行波束，将该上行波束确定为最佳上行波束，使得终端设备可以在该最佳上行波上向网络设备发送初始接入过程中的后续其他上行消息，网络设备可以接收终端设备在最佳上行波束上发送的消息，这样网络设备无需重新进行波束扫描就能够接收到终端设备发送的消息，减少了网络设备接收随机接入前导码和初始接入过程中的后续其他上行消息的过程所消耗的时间，减少了终端设备的初始接入过程的时间，降低了终端设备的初始接入过程的时延。
在现有的终端设备初始接入的技术方案中，网络设备向终端设备发送同步信号、系统配置信息、随机接入响应消息等下行消息。在终端设备的初始接入过程中，网络设备会向终端设备多次发送初始接入过程中的下行消息时，网络设备都会在一个方向的下行波束上向终端设备发送初始接入过程中的下行消息，因此终端设备每次都需要通过波束扫描在各个方向的下行波束上检测是否存在网络设备发送的初始接入过程中的下行消息。若终端设备在一个方向的下行波束上检测到网络设备发送的初始接入过程中的下行消息，则终端设备在该方向的下行波束上接收网络设备发送的初始接入过程中的下行消息。由于网络设备会向终端设备多次发送初始接入过程中的下行消息，终端设备每次接收网络设备发送的初始接入过程中的下行消息之前都需要进行波束扫描，每次波束扫描的过程可能会消耗较长时间，因此终端设备的初始接入过程中终端设备多次接收网络设备发送的下行消息的过程会消耗较长时间，进而导致终端设备的初始接入过程时间较长。
基于上述问题，为了减少终端设备的初始接入过程中终端设备每次接收网络设备发送的下行消息的过程所消耗的时间，进而进一步减少终端设备的初始接入过程的时间，本实施例提供了一种确定最佳下行波束的方法，该方法中涉及终端设备和网络设备，该方法中涉及的终端设备和网络设备可以和图2示出的方法中涉及的终端设备和网络设备为相同设备。如图6示出一种确定最佳下行波束的方法流程示意图，图6中终端设备与网络设备之间的交互过程如下：
S601、网络设备根据多个同步信号块携带的同步信号块时间索引，在不同的下行波束上发送多个同步信号块，该同步信号块时间索引用于指示携带该同步信号块时间索引的同步信号块在多个同步信号块中被发送的时间顺序，该同步信号块用于终端设备根据接收到的一个同步信号块携带的同步信号块时间索引确定该终端设备在多个上行波束上发送的随机接入前导码。
需要说明的是，S601中网络设备在不同的下行波束上发送多个同步信号块的方法，与图4所示的方法中的S401中网络设备在不同的下行波束上发送多个同步信号块的方法相同，可参见图4所示的方法中的S401中网络设备在不同的下行波束上发送多个同步信号块的方法的相关描述，此处不再赘述。
S602、终端设备接收网络设备在不同的下行波束上向终端设备发送的多个同步信号块中的一个同步信号块，该同步信号块可以为终端设备首次接收的同步信号块。
S601中网络设备在不同的下行波束上发送携带有同步信号块时间索引的多个同步信号块，S602中终端设备可以接收网络设备在不同的下行波束上发送的这多个同步信号块中的一个同步信号块。在一种实现方式中，终端设备可以接收网络设备发送的一个携带有同步信号块时间索引的同步信号块，并在接收到该同步信号块后暂停接收网络设备后续发送的携带有同步信号块时间索引的同步信号块。在另一种实现方式中，终端设备可以接收网 络设备发送的多个携带有同步信号块时间索引的同步信号块，并从接收到的多个同步信号块中筛选出一个信号质量最好的同步信号块。需要说明的是，终端设备还可以通过其他方式接收网络设备发送的一个携带有同步信号块时间索引的同步信号块，本实施例中并不限定。
S603、终端设备通过匹配预设的同步信号块时间索引和随机接入前导码的对应关系，确定接收的同步信号块携带的同步信号块时间索引对应的随机接入前导码，该确定的随机接入前导码为终端设备采用预设的资源在多个上行波束上向网络设备发送的随机接入前导码。
需要说明的是，S603中终端设备确定接收的同步信号块携带的同步信号块时间索引对应的随机接入前导码的方法，与图4所示的方法中的S403中终端设备确定接收的同步信号块携带的同步信号块时间索引对应的随机接入前导码的方法相同，可参见图4所示的方法中的S403中终端设备确定接收的同步信号块携带的同步信号块时间索引对应的随机接入前导码的方法的相关描述，此处不再赘述。
S604、终端设备向网络设备发送随机接入前导码。
S604中，终端设备可以在多个上行波束上向网络设备发送随机接入前导码。需要说明的是，S604中终端设备在多个上行波束上向网络设备发送随机接入前导码的方法，与图2所示的方法中的S201中终端设备在多个上行波束上向网络设备发送随机接入前导码的方法相同，可参见图2所示的方法中的S201中终端设备在多个上行波束上向网络设备发送随机接入前导码的方法的相关描述，此处不再赘述。
S605、网络设备接收终端设备发送的随机接入前导码后，通过匹配预设的同步信号块时间索引与随机接入前导码的对应关系，确定接收的随机接入前导码对应的同步信号块时间索引，并将S601中用于发送携带有该同步信号块时间索引的同步信号块的下行波束确定为最佳下行波束。
其中，最佳下行波束用于网络设备在该最佳下行波束上向终端设备发送初始接入过程中后续的下行消息。
S605中网络设备接收终端设备发送的随机接入前导码后，将接收的随机接入前导码和预设的同步信号块时间索引与随机接入前导码的对应关系相匹配，来确定接收的随机接入前导码对应的同步信号块时间索引，并将用于发送携带有该同步信号块时间索引的同步信号块的下行波束确定为最佳下行波束。需要说明的是，预设的同步信号块时间索引与随机接入前导码的对应关系与图4所示的方法中的S403中预设的同步信号块时间索引与随机接入前导码的对应关系类似，可参见图4所示的方法中的S403中预设的同步信号块时间索引与随机接入前导码的对应关系的相关描述，此处不再赘述。
通过图6所示的确定最佳下行波束的方法，网络设备确定最佳下行波束，这样网络设备可以在该最佳下行波上向终端设备发送初始接入过程中后续的下行消息，减少了终端设备接收初始接入过程中后续的下行消息的过程所消耗的时间，从而减少了终端设备的初始接入过程的时间。
需要说明的是，图6所示的确定最佳下行波束的方法与上文图2所示的初始接入方法可以为同一过程。在此情况下，S601与图4所示的方法中的S401可以是相同的步骤，S602与图4所示的方法中的S402可以是相同的步骤，S603与图4所示的方法中的S403可以是相同的步骤，S604与图2所示的方法中的S201可以是相同的步骤。S605可以在图2所示 的方法中的S201之前执行，也可以在图2所示的方法中的S201之后执行，还可以和图2所示的方法中的S201一起执行，本实施例中不作限定。
在一种实现方式中，S604之后，网络设备可以在最佳下行波束上向终端设备发送初始接入过程中后续的下行消息，例如随机接入响应消息，这样可以减少终端设备接收随机接入响应消息的过程所消耗的时间，从而可以减少终端设备的初始接入过程的时间。进一步的，网络设备还可以在随机接入响应消息中携带用于指示最佳下行波束的信息。终端设备接收网络设备发送的随机接入响应消息后，获取随机接入响应消息中携带的用于指示最佳下行波束的信息，将用于指示最佳下行波束的信息携带在初始接入过程中的后续其他上行消息中，向网络设备发送该初始接入过程中的后续其他上行消息。这样网络设备可以根据初始接入过程中的后续其他上行消息确定向终端设备用于发送初始接入过程中后续的下行消息的最佳下行波束，有助于节省网络设备用于存储所消耗的存储空间，还有助于减少终端设备每次接收初始接入过程中的下行消息的过程所消耗的时间，从而进一步地减少终端设备的初始接入过程的时间。
从终端设备向网络设备发送随机接入前导码的时刻到终端设备向网络设备发送初始接入过程中的后续其他上行消息的时刻，在这段时长内，终端设备发生位移，可能会造成该终端设备的位置不再处于网络设备根据随机接入前导码确定的最佳下行波束所具有的波束方向上，若此时网络设备仍在该确定的最佳下行波束上向该终端设备发送初始接入过程中后续的下行消息，则终端设备可能接收不到网络设备发送的初始接入过程中后续的下行消息。
基于上述问题，为了保证终端设备可以接收到网络设备发送的初始接入过程中后续的下行消息，在一种实现方式中，在S603后终端设备向网络设备发送包括携带有同步信号块时间索引的同步信号块的初始接入过程中的后续其他上行消息，该初始接入过程中的后续其他上行消息中包括的同步信号块为终端设备在S603之后，发送该初始接入过程中的后续其他上行消息之前重新接收的一个同步信号块，网络设备接收该终端设备发送的初始接入过程中的后续其他上行消息后，可以根据接收的初始接入过程中的后续其他上行消息包括的同步信号块携带的同步信号块时间索引，再次执行S604来重新确定该网络设备用于发送初始接入过程中后续的下行消息的最佳下行波束。这样，从终端设备向网络设备发送随机接入前导码的时刻到终端设备向网络设备发送初始接入过程中的后续其他上行消息的时刻，在这段之间的时长内，即使终端设备发生位移，造成终端设备的位置不再处于网络设备根据随机接入前导码确定的最佳下行波束所具有的波束方向上，网络设备仍能可以重新确定向终端设备用于发送初始接入过程中后续的下行消息的最佳下行波束，可以保证终端设备能够接收到网络设备发送的初始接入过程中后续的下行消息，有助于进一步地减少终端设备每次接收初始接入过程中后续的下行消息的过程所消耗的时间，从而减少终端设备的初始接入过程的时间。
本申请实施例提供的确定最佳下行波束的技术方案中，网络设备根据多个同步信号块携带的同步信号块时间索引在不同的下行波束上发送多个同步信号块，终端设备接收到一个携带有同步信号块时间索引的同步信号块之后通过匹配预设的同步信号块时间索引和随机接入前导码的对应关系，来确定接收的同步信号块携带的同步信号块时间索引对应的随机接入前导码，并向网络设备发送随机接入前导码，网络设备接收到随机接入前导码后通过匹配预设的同步信号块时间索引与随机接入前导码的对应关系，确定接收的随机接入 前导码对应的同步信号块时间索引，并将用于发送携带有该同步信号块时间索引的同步信号块的下行波束确定为最佳下行波束，使得网络设备可以在该最佳下行波上向终端设备发送初始接入过程中后续的下行消息，有助于减少终端设备每次接收初始接入过程中的下行消息的过程所消耗的时间，进而进一步地减少终端设备的初始接入过程的时间，从而进一步地降低终端设备的初始接入过程的时延。
基于同一发明构思，本申请实施例还提供了一种终端设备，该终端设备可以实现图2对应的实施例提供的方法中终端设备执行的方法。参阅图7所示，该终端设备包括：收发单元701，其中，
收发单元701，用于在多个上行波束上向网络设备发送随机接入前导码，随机接入前导码用于网络设备从多个上行波束中筛选出终端设备的最佳上行波束，该终端设备的最佳上行波束为多个上行波束中网络设备接收信号质量最好的随机接入前导码的上行波束。
在一种实现方式中，收发单元701还用于：在多个上行波束上向网络设备发送随机接入前导码之前，接收网络设备在不同的下行波束上发送的多个携带有同步信号块时间索引的同步信号块中的一个同步信号块，该一个同步信号块为收发单元701首次接收的同步信号块。终端设备的处理单元702，用于在收发单元701接收网络设备发送的一个携带有同步信号块时间索引的同步信号块之后，通过匹配预设的同步信号块时间索引和随机接入前导码的对应关系，确定接收的同步信号块携带的同步信号块时间索引对应的随机接入前导码，该确定的随机接入前导码为收发单元701在多个上行波束上向网络设备发送的随机接入前导码，该确定的随机接入前导码用于网络设备通过预设的同步信号块时间索引与随机接入前导码的对应关系和该随机接入前导码确定最佳下行波束。
相应地，同步信号块包含主同步信号、辅同步信号、参考信号以及PBCH，可以在PBCH中携带同步信号块时间索引。同步信号块时间索引与随机接入前导码的对应关系可以预先设置为如下对应关系之一：至少一个同步信号块时间索引与至少一个随机接入前导码一一对应；至少一个同步信号块时间索引与至少一个随机接入前导码组一一对应，每个随机接入前导码组包括多个随机接入前导码。
在一种实现方式中，收发单元701可以采用不同的资源在多个上行波束上向网络设备发送随机接入前导码，不同的资源包括不同的时隙资源和/或不同的子带资源。
在一种实现方式中，收发单元701还可以在采用不同的资源在多个上行波束上向网络设备发送随机接入前导码之前，接收网络设备发送的资源配置信息，资源配置信息用于指示终端设备在多个上行波束上发送随机接入前导码时采用的不同的资源。
在一种实现方式中，收发单元701还可以在多个上行波束上向网络设备发送随机接入前导码之后，接收网络设备发送的随机接入响应消息，该随机接入响应消息包括用于指示终端设备的最佳上行波束的信息。
其中，用于指示终端设备的最佳上行波束的信息可以包括以下中的信息一种或组合：收发单元701在最佳上行波束上发送随机接入前导码时所采用的时隙资源和/或子带资源，最佳上行波束的标识。
在一种实现方式中，收发单元701还可以在多个上行波束上向网络设备发送随机接入前导码之后，接收网络设备发送的载波配置信息，该载波配置信息用于指示终端设备发送初始接入过程中后续的上行消息时采用的载波为单载波或多载波。
在一种实现方式中，载波配置信息包括直接指示单载波或多载波；或者载波配置信息 包括时间提前量阈值，时间提前量阈值用于终端设备确定该终端设备发送初始接入过程中后续的上行消息时采用的载波。
需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。在本申请的实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
基于同一发明构思，本申请实施例还提供了一种终端设备，该终端设备采用图2对应的实施例提供的方法中终端设备执行的方法，可以是与图7所示的终端设备相同的设备。参阅图8所示，所述终端设备包括：处理器801、收发机802以及存储器803，其中：
处理器801，用于读取存储器803中的程序，执行下列过程：
通过收发机802在多个上行波束上向网络设备发送随机接入前导码，随机接入前导码用于网络设备从多个上行波束中筛选出终端设备的最佳上行波束，该终端设备的最佳上行波束为多个上行波束中网络设备接收信号质量最好的随机接入前导码的上行波束；
收发机802，用于在处理器801的控制下接收和发送数据；收发机802也可以为通信模块，该通信模块包括用于接收数据和/或发送数据的通信接口。
在一种实现方式中，处理器801还用于：通过收发机802在多个上行波束上向网络设备发送随机接入前导码之前，接收网络设备在不同的下行波束上发送的多个携带有同步信号块时间索引的同步信号块中的一个同步信号块，该一个同步信号块为收发机802首次接收的同步信号块；终端设备还包括处理器801，用于在收发机802接收网络设备发送的一个携带有同步信号块时间索引的同步信号块之后，通过匹配预设的同步信号块时间索引和随机接入前导码的对应关系，确定接收的同步信号块携带的同步信号块时间索引对应的随机接入前导码，确定的随机接入前导码为处理器801通过收发机802在多个上行波束上向网络设备发送的随机接入前导码，该确定的随机接入前导码用于网络设备通过预设的同步信号块时间索引与随机接入前导码的对应关系和该随机接入前导码确定最佳下行波束。
相应地，同步信号块包含主同步信号、辅同步信号、参考信号以及物理广播信道PBCH，可以在PBCH中携带同步信号块时间索引。预设的同步信号块时间索引与随机接入前导码的对应关系可以包括如下对应关系之一：至少一个同步信号块时间索引与至少一个随机接入前导码一一对应；至少一个同步信号块时间索引与至少一个随机接入前导码组一一对应，每个随机接入前导码组包括多个随机接入前导码。
在一种实现方式中，处理器801可以通过收发机802采用不同的资源在多个上行波束上向网络设备发送随机接入前导码，该不同的资源包括不同的时隙资源和/或不同的子带资源。
在一种实现方式中，处理器801还可以在通过收发机802采用不同的资源在多个上行波束上向网络设备发送随机接入前导码之前，接收网络设备发送的资源配置信息，该资源配置信息用于指示终端设备在多个上行波束上发送随机接入前导码时采用的不同的资源。
在一种实现方式中，处理器801还用于：通过收发机802在多个上行波束上向网络设备发送随机接入前导码之后，通过收发机802接收网络设备发送的随机接入响应消息，该随机接入响应消息包括用于指示终端设备的最佳上行波束的信息。
其中，用于指示终端设备的最佳上行波束的信息包括如下信息之一或组合：收发机802在最佳上行波束上发送随机接入前导码时所采用的时隙资源和/或子带资源；最佳上行波束的标识。
在一种实现方式中，处理器801还可以通过收发机802在多个上行波束上向网络设备发送随机接入前导码之后，通过收发机802接收网络设备发送的载波配置信息，载波配置信息用于指示终端设备发送初始接入过程中后续的上行消息时采用的载波为单载波或多载波。
在一种实现方式中，载波配置信息包括直接指示单载波或多载波；或者载波配置信息包括时间提前量阈值，时间提前量阈值用于终端设备确定该终端设备发送初始接入过程中后续的上行消息时采用的载波。
处理器801、收发机802以及存储器803通过总线相互连接；总线可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。
其中，在图8中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器801代表的一个或多个处理器和存储器803代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机802可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器801负责管理总线架构和通常的处理，存储器803可以存储处理器801在执行操作时所使用的数据。
可选的，处理器801可以是中央处理器、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field－programmable gate array，FPGA)或复杂可编程逻辑器件(complex programmable logic device，CPLD)。
基于同一发明构思，本申请实施例还提供了一种网络设备，该网络设备可以实现图2对应的实施例提供的方法中网络设备执行的方法。参阅图9所示，该网络设备包括：收发单元901和处理单元902，其中，
收发单元901，用于接收终端设备在多个上行波束上发送的随机接入前导码；
处理单元902，用于从收发单元901在多个上行波束上接收的随机接入前导码中筛选出信号质量最好的随机接入前导码，并将收发单元901接收信号质量最好的随机接入前导码的上行波束确定为终端设备的最佳上行波束。
在一种实现方式中，收发单元901还可以在接收终端设备在多个上行波束上发送的随机接入前导码之前，根据多个同步信号块携带的同步信号块时间索引，在不同的下行波束上向终端设备发送多个同步信号块，同步信号块时间索引用于指示携带该同步信号块时间 索引的同步信号块在多个同步信号块中被发送的时间顺序，同步信号块用于终端设备将接收到的一个同步信号块携带的同步信号块时间索引对应的随机接入前导码确定为终端设备在多个上行波束上发送的随机接入前导码。
相应地，同步信号块包含主同步信号、辅同步信号、参考信号以及PBCH，可以在PBCH中携带同步信号块时间索引。收发单元901还可以向终端设备发送随机接入响应消息，该随机接入响应消息包括用于指示终端设备的最佳上行波束的信息。
在一种实现方式中，用于指示终端设备的最佳上行波束的信息包括：终端设备在最佳上行波束上发送随机接入前导码时所采用的时隙资源和/或子带资源；和/或，最佳上行波束的标识。
在一种实现方式中，处理单元902还可以在收发单元901接收终端设备在多个上行波束上发送的随机接入前导码之后，通过匹配预设的同步信号块时间索引与随机接入前导码的对应关系，确定接收的随机接入前导码对应的同步信号块时间索引，并将用于发送携带有该同步信号块时间索引的同步信号块的下行波束确定为最佳下行波束。
在一种实现方式中，同步信号块时间索引与随机接入前导码的对应关系可以预先设置为如下对应关系之一：至少一个同步信号块时间索引与至少一个随机接入前导码一一对应；至少一个同步信号块时间索引与至少一个随机接入前导码组一一对应，每个随机接入前导码组包括多个随机接入前导码。
在一种实现方式中，收发单元901在接收终端设备在多个上行波束上发送的随机接入前导码时，具体用于：接收终端设备采用不同的资源在多个上行波束上发送的随机接入前导码，不同的资源包括不同的时隙资源和/或不同的子带资源。
在一种实现方式中，收发单元901还可以在接收终端设备采用不同的资源在多个上行波束上发送的随机接入前导码之前，向终端设备发送资源配置信息，该资源配置信息用于指示终端设备在多个上行波束上发送随机接入前导码时采用的不同的资源。
在一种实现方式中，收发单元901还可以在接收终端设备在多个上行波束上发送的随机接入前导码之后，向终端设备发送载波配置信息，载波配置信息用于指示终端设备发送初始接入过程中后续的上行消息时采用的载波为单载波或多载波。
其中，载波配置信息包括直接指示单载波或多载波；或者载波配置信息包括时间提前量阈值，时间提前量阈值用于终端设备确定该终端设备在发送初始接入过程中后续的上行消息时采用的载波。
在一种实现方式中，收发单元901还可以在接收终端设备在多个上行波束上发送的随机接入前导码之后，在一个随机接入响应消息窗内多次向终端设备发送随机接入响应消息。
基于同一发明构思，本申请实施例还提供了一种网络设备，该网络设备采用图2对应的实施例提供的方法中网络设备执行的方法，可以是与图9所示的网络设备相同的设备。参阅图10所示，所述网络设备包括：处理器1001、收发机1002以及存储器1003，其中：
处理器1001，用于读取存储器1003中的程序，执行下列过程：
处理器1001，用于通过收发机1002接收终端设备在多个上行波束上发送的随机接入前导码；
处理器1001，还用于从收发机1002在多个上行波束上接收的随机接入前导码中筛选出信号质量最好的随机接入前导码，并将收发机1002接收信号质量最好的随机接入前导 码的上行波束确定为终端设备的最佳上行波束；
收发机1002，用于在处理器1001的控制下接收和发送数据；收发机1002也可以为通信模块，该通信模块包括用于接收数据和/或发送数据的通信接口。
在一种实现方式中，处理器1001还可以通过收发机1002在接收终端设备在多个上行波束上发送的随机接入前导码之前，根据多个同步信号块携带的同步信号块时间索引，在不同的下行波束上向终端设备发送多个同步信号块，该同步信号块时间索引用于指示携带该同步信号块时间索引的同步信号块在多个同步信号块中被发送的时间顺序，该同步信号块用于终端设备将接收到的一个同步信号块携带的同步信号块时间索引对应的随机接入前导码确定为终端设备在多个上行波束上发送的随机接入前导码。
相应地，同步信号块包含主同步信号、辅同步信号、参考信号以及PBCH，可以在PBCH中携带同步信号块时间索引。
在一种实现方式中，处理器1001还可以通过收发机1002向终端设备发送随机接入响应消息，该随机接入响应消息包括用于指示终端设备的最佳上行波束的信息。
其中，用于指示终端设备的最佳上行波束的信息包括：终端设备在最佳上行波束上发送随机接入前导码时所采用的时隙资源和/或子带资源；和/或最佳上行波束的标识。
在一种实现方式中，处理器1001还可以在收发机1002接收终端设备在多个上行波束上发送的随机接入前导码之后，通过匹配预设的同步信号块时间索引与随机接入前导码的对应关系，确定接收的随机接入前导码对应的同步信号块时间索引，并将用于发送携带有该同步信号块时间索引的同步信号块的下行波束确定为最佳下行波束。
相应地，同步信号块时间索引与随机接入前导码的对应关系可以预先设置为如下对应关系之一：至少一个同步信号块时间索引与至少一个随机接入前导码一一对应；或者至少一个同步信号块时间索引与至少一个随机接入前导码组一一对应，每个随机接入前导码组包括多个随机接入前导码。
在一种实现方式中，处理器1001在通过收发机1002接收终端设备在多个上行波束上发送的随机接入前导码时，具体用于：接收终端设备采用不同的资源在多个上行波束上发送的随机接入前导码，不同的资源包括不同的时隙资源和/或不同的子带资源。
在一种实现方式中，处理器1001还可以通过收发机1002在接收终端设备采用不同的资源在多个上行波束上发送的随机接入前导码之前，向终端设备发送资源配置信息，资源配置信息用于指示终端设备在多个上行波束上发送随机接入前导码时采用的不同的资源。
在一种实现方式中，处理器1001还可以通过收发机1002在接收终端设备在多个上行波束上发送的随机接入前导码之后，向终端设备发送载波配置信息，该载波配置信息用于指示终端设备发送初始接入过程中后续的上行消息时采用的载波为单载波或多载波。
其中，载波配置信息包括直接指示单载波或多载波；或者载波配置信息包括时间提前量阈值，时间提前量阈值用于终端设备确定该终端设备在发送初始接入过程中后续的上行消息时采用的载波。
在一种实现方式中，处理器1001还可以通过收发机1002在接收终端设备在多个上行波束上发送的随机接入前导码之后，在一个随机接入响应消息窗内多次向终端设备发送随机接入响应消息。
处理器1001、收发机1002以及存储器1003通过总线相互连接；总线可以是PCI总线或EISA总线等。所述总线可以分为地址总线、数据总线、控制总线等。
其中，在图10中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1001代表的一个或多个处理器和存储器1003代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1002可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器1001负责管理总线架构和通常的处理，存储器1003可以存储处理器1001在执行操作时所使用的数据。
可选的，处理器1001可以是中央处理器、ASIC、FPGA或CPLD。
本申请实施例中还提供了一种计算机存储介质，该存储介质中存储软件程序，该软件程序在被一个或多个处理器读取并执行时可实现上述实施例中终端设备执行的初始接入方法，或者该软件程序在被一个或多个处理器读取并执行时可实现上述实施例中网络设备执行的初始接入方法。
本申请实施例中还提供了一种初始接入装置，该装置包括芯片，该芯片用于执行上述初始接入方法中终端设备执行的方法，该芯片通过收发机(或通信模块)执行上述初始接入方法中终端设备接收数据和/或数据的方法，或者该芯片用于执行上述初始接入方法中网络设备执行的方法，该芯片通过收发机(或通信模块)执行上述初始接入方法中网络设备接收数据和/或数据的方法。
本申请实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述实施例中终端设备执行的初始接入方法，或者使得计算机可以执行上述实施例中网络设备执行的初始接入方法。
基于同一发明构思，本申请实施例还提供了一种通信系统，如图11所示，该通信系统包括终端设备1101和网络设备1102。其中，终端设备1101用于执行图2对应的实施例提供的方法中终端设备执行的方法，终端设备1101可以是与图7或图8所示的终端设备相同的设备；网络设备1102用于执行图2对应的实施例提供的方法中网络设备执行的方法，网络设备1102可以是与图9或图10所示的网络设备相同的设备；通过该通信系统可以实现本申请实施例提供的一种初始接入方法。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (30)

  1. 一种初始接入方法，其特征在于，包括：
    终端设备在多个上行波束上向网络设备发送随机接入前导码，所述随机接入前导码用于所述网络设备从所述多个上行波束中筛选出所述终端设备的最佳上行波束，所述终端设备的最佳上行波束为所述网络设备接收所述多个上行波束中信号质量最好的随机接入前导码的上行波束。
  2. 如权利要求1所述的方法，其特征在于，所述终端设备在多个上行波束上向网络设备发送随机接入前导码之前，还包括：
    所述终端设备接收所述网络设备在不同的下行波束上发送的多个携带有同步信号块时间索引的同步信号块中的一个同步信号块；
    所述终端设备通过匹配预设的同步信号块时间索引和随机接入前导码的对应关系，确定接收的所述同步信号块携带的同步信号块时间索引对应的随机接入前导码，确定的所述随机接入前导码为所述终端设备在所述多个上行波束上向所述网络设备发送的随机接入前导码。
  3. 如权利要求2所述的方法，其特征在于，所述同步信号块包含主同步信号、辅同步信号、参考信号以及物理广播信道PBCH，所述PBCH携带所述同步信号块时间索引；
    所述预设的同步信号块时间索引与随机接入前导码的对应关系，包括：
    至少一个同步信号块时间索引与至少一个随机接入前导码一一对应；或者
    至少一个同步信号块时间索引与至少一个随机接入前导码组一一对应，每个随机接入前导码组包括多个随机接入前导码。
  4. 如权利要求1至3任一所述的方法，其特征在于，所述终端设备在多个上行波束上向网络设备发送随机接入前导码，包括：
    所述终端设备采用不同的资源在多个上行波束上向所述网络设备发送所述随机接入前导码，所述不同的资源包括不同的时隙资源和/或不同的子带资源。
  5. 如权利要求1至5任一所述的方法，其特征在于，所述终端设备在多个上行波束上向网络设备发送随机接入前导码之后，还包括：
    所述终端设备接收所述网络设备发送的随机接入响应消息，所述随机接入响应消息包括用于指示所述终端设备的最佳上行波束的信息。
  6. 如权利要求5所述的方法，其特征在于，所述用于指示所述终端设备的所述最佳上行波束的信息，包括：
    所述终端设备在所述最佳上行波束上发送所述随机接入前导码时所采用的时隙资源和/或子带资源；和/或，
    所述最佳上行波束的标识。
  7. 如权利要求1至6任一所述的方法，其特征在于，所述终端设备在多个上行波束上向网络设备发送随机接入前导码之后，还包括：
    所述终端设备接收所述网络设备发送的载波配置信息，所述载波配置信息用于指示所述终端设备发送初始接入过程中后续的上行消息时采用的载波为单载波或多载波。
  8. 一种初始接入方法，其特征在于，包括：
    网络设备接收终端设备在多个上行波束上发送的随机接入前导码；
    所述网络设备从在所述多个上行波束上接收的所述随机接入前导码中筛选出信号质量最好的随机接入前导码，并将所述网络设备接收所述信号质量最好的随机接入前导码的上行波束确定为所述终端设备的最佳上行波束。
  9. 如权利要求8所述的方法，其特征在于，所述网络设备接收终端设备在多个上行波束上发送的随机接入前导码之前，还包括：
    所述网络设备根据多个同步信号块携带的同步信号块时间索引，在不同的下行波束上向所述终端设备发送所述多个同步信号块，所述同步信号块时间索引用于指示携带该同步信号块时间索引的同步信号块在所述多个同步信号块中被发送的时间顺序。
  10. 如权利要求9所述的方法，其特征在于，所述同步信号块包含主同步信号、辅同步信号、参考信号以及物理广播信道PBCH，所述PBCH携带所述同步信号块时间索引。
  11. 如权利要求8至10任一所述的方法，其特征在于，还包括：
    所述网络设备向所述终端设备发送随机接入响应消息，所述随机接入响应消息包括用于指示所述终端设备的最佳上行波束的信息。
  12. 如权利要求11所述的方法，其特征在于，所述用于指示所述终端设备的所述最佳上行波束的信息包括：
    所述终端设备在所述最佳上行波束上发送随机接入前导码时所采用的时隙资源和/或子带资源；和/或，
    所述最佳上行波束的标识。
  13. 如权利要求8至12任一所述的方法，其特征在于，所述网络设备接收终端设备在多个上行波束上发送的随机接入前导码之后，还包括：
    所述网络设备通过匹配预设的同步信号块时间索引与随机接入前导码的对应关系，确定接收的随机接入前导码对应的同步信号块时间索引，并将用于发送携带有该同步信号块时间索引的同步信号块的下行波束确定为最佳下行波束；
    其中，所述预设的同步信号块时间索引与随机接入前导码的对应关系，包括：
    至少一个同步信号块时间索引与至少一个随机接入前导码一一对应；或者
    至少一个同步信号块时间索引与至少一个随机接入前导码组一一对应，每个随机接入前导码组包括多个随机接入前导码。
  14. 如权利要求8至13任一所述的方法，其特征在于，所述网络设备接收终端设备在多个上行波束上发送的随机接入前导码，包括：
    所述网络设备接收所述终端设备采用不同的资源在所述多个上行波束上发送的随机接入前导码，所述不同的资源包括不同的时隙资源和/或不同的子带资源。
  15. 如权利要求8至14任一所述的方法，其特征在于，所述网络设备接收终端设备在多个上行波束上发送的随机接入前导码之后，还包括：
    所述网络设备向所述终端设备发送载波配置信息，所述载波配置信息用于指示所述终端设备在发送初始接入过程中后续的上行消息时采用的载波为单载波或多载波。
  16. 一种终端设备，其特征在于，包括：
    收发单元，用于在多个上行波束上向网络设备发送随机接入前导码，所述随机接入前导码用于所述网络设备从所述多个上行波束中筛选出所述终端设备的最佳上行波束，所述终端设备的最佳上行波束为所述网络设备接收所述多个上行波束中信号质量最好的随机接入前导码的上行波束。
  17. 如权利要求16所述的终端设备，其特征在于，所述收发单元还用于：
    在多个上行波束上向所述网络设备发送所述随机接入前导码之前，接收所述网络设备在不同的下行波束上发送的多个携带有同步信号块时间索引的同步信号块中的一个同步信号块，所述一个同步信号块为所述终端设备首次接收的同步信号块；
    所述终端设备的处理单元，用于在所述收发单元接收所述网络设备发送的一个携带有同步信号块时间索引的同步信号块之后，通过匹配预设的同步信号块时间索引和随机接入前导码的对应关系，确定接收的所述同步信号块携带的同步信号块时间索引对应的随机接入前导码，确定的所述随机接入前导码为所述收发单元在所述多个上行波束上向所述网络设备发送的随机接入前导码。
  18. 如权利要求17所述的终端设备，其特征在于，所述同步信号块包含主同步信号、辅同步信号、参考信号以及物理广播信道PBCH，所述PBCH携带所述同步信号块时间索引；
    所述预设的同步信号块时间索引与随机接入前导码的对应关系，包括：
    至少一个同步信号块时间索引与至少一个随机接入前导码一一对应；或者
    至少一个同步信号块时间索引与至少一个随机接入前导码组一一对应，每个随机接入前导码组包括多个随机接入前导码。
  19. 如权利要求16至18任一所述的终端设备，其特征在于，所述收发单元在多个上行波束上向网络设备发送随机接入前导码时，具体用于：
    采用不同的资源在多个上行波束上向所述网络设备发送所述随机接入前导码，所述不同的资源包括不同的时隙资源和/或不同的子带资源。
  20. 如权利要求16至19任一所述的终端设备，其特征在于，所述收发单元还用于：
    在多个上行波束上向网络设备发送随机接入前导码之后，接收所述网络设备发送的随机接入响应消息，所述随机接入响应消息包括用于指示所述终端设备的最佳上行波束的信息。
  21. 如权利要求20所述的终端设备，其特征在于，所述用于指示所述终端设备的所述最佳上行波束的信息，包括：
    所述收发单元在所述最佳上行波束上发送所述随机接入前导码时所采用的时隙资源和/或子带资源；和/或，
    所述最佳上行波束的标识。
  22. 如权利要求16至21任一所述的终端设备，其特征在于，所述收发单元还用于：
    在多个上行波束上向网络设备发送随机接入前导码之后，接收所述网络设备发送的载波配置信息，所述载波配置信息用于指示所述终端设备发送初始接入过程中后续的上行消息时采用的载波为单载波或多载波。
  23. 一种网络设备，其特征在于，包括：
    收发单元，用于接收终端设备在多个上行波束上发送的随机接入前导码；
    处理单元，用于从所述收发单元在所述多个上行波束上接收的所述随机接入前导码中筛选出信号质量最好的随机接入前导码，并将所述收发单元接收所述信号质量最好的随机接入前导码的上行波束确定为所述终端设备的最佳上行波束。
  24. 如权利要求23所述的网络设备，其特征在于，所述收发单元还用于：
    在接收所述终端设备在多个上行波束上发送的随机接入前导码之前，根据多个同步信 号块携带的同步信号块时间索引，在不同的下行波束上向所述终端设备发送所述多个同步信号块，所述同步信号块时间索引用于指示携带该同步信号块时间索引的同步信号块在所述多个同步信号块中被发送的时间顺序。
  25. 如权利要求24所述的网络设备，其特征在于，所述同步信号块包含主同步信号、辅同步信号、参考信号以及物理广播信道PBCH，所述PBCH携带所述同步信号块时间索引。
  26. 如权利要求23至25任一所述的网络设备，其特征在于，所述收发单元还用于：
    向所述终端设备发送随机接入响应消息，所述随机接入响应消息包括用于指示所述终端设备的最佳上行波束的信息。
  27. 如权利要求26所述的网络设备，其特征在于，所述用于指示所述终端设备的所述最佳上行波束的信息包括：
    所述终端设备在所述最佳上行波束上发送随机接入前导码时所采用的时隙资源和/或子带资源；和/或，
    所述最佳上行波束的标识。
  28. 如权利要求23至27任一所述的网络设备，其特征在于，所述处理单元还用于：
    在所述收发单元接收终端设备在多个上行波束上发送的随机接入前导码之后，通过匹配预设的同步信号块时间索引与随机接入前导码的对应关系，确定接收的随机接入前导码对应的同步信号块时间索引，并将用于发送携带有该同步信号块时间索引的同步信号块的下行波束确定为最佳下行波束；
    所述预设的同步信号块时间索引与随机接入前导码的对应关系，包括：
    至少一个同步信号块时间索引与至少一个随机接入前导码一一对应；或者
    至少一个同步信号块时间索引与至少一个随机接入前导码组一一对应，每个随机接入前导码组包括多个随机接入前导码。
  29. 如权利要求23至28任一所述的网络设备，其特征在于，所述收发单元在接收终端设备在多个上行波束上发送的随机接入前导码时，具体用于：
    接收所述终端设备采用不同的资源在所述多个上行波束上发送的随机接入前导码，所述不同的资源包括不同的时隙资源和/或不同的子带资源。
  30. 如权利要求23至29任一所述的网络设备，其特征在于，所述收发单元还用于：
    在接收终端设备在多个上行波束上发送的随机接入前导码之后，向所述终端设备发送载波配置信息，所述载波配置信息用于指示所述终端设备发送初始接入过程中后续的上行消息时采用的载波为单载波或多载波。
PCT/CN2017/095310 2017-05-12 2017-07-31 一种初始接入方法及设备 WO2018205428A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780040938.8A CN109417804B (zh) 2017-05-12 2017-07-31 一种初始接入方法及设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710335825.2 2017-05-12
CN201710335825 2017-05-12

Publications (2)

Publication Number Publication Date
WO2018205428A1 true WO2018205428A1 (zh) 2018-11-15
WO2018205428A9 WO2018205428A9 (zh) 2019-02-14

Family

ID=64104244

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/095310 WO2018205428A1 (zh) 2017-05-12 2017-07-31 一种初始接入方法及设备

Country Status (2)

Country Link
CN (1) CN109417804B (zh)
WO (1) WO2018205428A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021235986A1 (en) * 2020-05-20 2021-11-25 Telefonaktiebolaget Lm Ericsson (Publ) Base station, first user eqiupment, second user equipment and methods in a wireless communications network

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3048851A1 (en) * 2015-01-26 2016-07-27 ASUSTeK Computer Inc. Method and apparatus for beam detection in a wireless communication system
CN106358216A (zh) * 2015-07-17 2017-01-25 北京信威通信技术股份有限公司 一种多波束随机接入方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017022870A1 (en) * 2015-08-03 2017-02-09 Samsung Electronics Co., Ltd. Method and apparatus for initial access in wireless communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3048851A1 (en) * 2015-01-26 2016-07-27 ASUSTeK Computer Inc. Method and apparatus for beam detection in a wireless communication system
CN106358216A (zh) * 2015-07-17 2017-01-25 北京信威通信技术股份有限公司 一种多波束随机接入方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021235986A1 (en) * 2020-05-20 2021-11-25 Telefonaktiebolaget Lm Ericsson (Publ) Base station, first user eqiupment, second user equipment and methods in a wireless communications network

Also Published As

Publication number Publication date
WO2018205428A9 (zh) 2019-02-14
CN109417804B (zh) 2021-03-30
CN109417804A (zh) 2019-03-01

Similar Documents

Publication Publication Date Title
EP2946521B1 (en) Method and apparatus for sending and receiving downlink control information
US11109392B2 (en) Communication method, network device, and relay device
JP6019005B2 (ja) 無線基地局、ユーザ端末及び無線通信方法
US20190098591A1 (en) Parameter Determining Method, Base Station, and User Equipment
US11330543B2 (en) Signal sending method, signal receiving method, and apparatus
EP3573299B1 (en) Time information determining method, network node, and terminal device
JP2020523902A (ja) 通信方法、ネットワークデバイス、およびユーザ機器
US10270576B2 (en) Information transmission method, user equipment, and base station
CN114339615B (zh) Bwp的配置方法、装置、网络侧设备及终端
WO2019033396A1 (zh) 无线通信方法和设备
CA3036518A1 (en) Pilot signal transmission method and device
JP2018509112A (ja) 共通情報送信方法および装置
WO2019076207A1 (zh) 数据传输的确认方法及设备
US11856539B2 (en) Method and device for transmitting downlink control information
WO2018202027A1 (zh) 子载波间隔类型的确定方法、装置
WO2019024901A1 (zh) 一种资源分配方法及装置
WO2016149875A1 (zh) 一种载波配置方法及设备
EP3300439B1 (en) Data transmission method and device
WO2023104036A1 (zh) 获取波束信息的方法、装置、设备及存储介质
WO2018205428A1 (zh) 一种初始接入方法及设备
WO2020029837A1 (zh) 一种同步广播信息的发送、检测方法及装置
WO2022237498A1 (zh) 重复传输的确定方法、装置、终端及网络侧设备
WO2017193378A1 (zh) 子帧配置方法及装置
US20240023041A1 (en) Broadcast data communication method and apparatus, and device
CN103975618B (zh) 传输信息的方法和装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17909573

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17909573

Country of ref document: EP

Kind code of ref document: A1