WO2017133555A1 - Procédé d'accès aléatoire, station de base, terminal, et support de stockage informatique - Google Patents

Procédé d'accès aléatoire, station de base, terminal, et support de stockage informatique Download PDF

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Publication number
WO2017133555A1
WO2017133555A1 PCT/CN2017/072282 CN2017072282W WO2017133555A1 WO 2017133555 A1 WO2017133555 A1 WO 2017133555A1 CN 2017072282 W CN2017072282 W CN 2017072282W WO 2017133555 A1 WO2017133555 A1 WO 2017133555A1
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Prior art keywords
random access
different
types
frequency domain
sequences
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PCT/CN2017/072282
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English (en)
Chinese (zh)
Inventor
侯雪颖
徐晓东
童辉
王锐
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中国移动通信集团公司
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Publication of WO2017133555A1 publication Critical patent/WO2017133555A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to wireless communication technologies, and in particular, to a random access method, a base station, a terminal, and a computer storage medium.
  • the application characteristics of the Internet of Things business put forward the requirements of power consumption, cost, coverage, mobility, security and reliability for wireless IoT technology, especially the “three low-level services”, which require ultra-low power consumption and ultra-low cost. And ultra-deep coverage, and existing cellular technology is no longer able to meet future market demand.
  • the release of the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) 13 (Rel13, Release 13) is studying narrowband IoT technology in the narrowband Internet of Things (NB-IoT) project, and the design goal is to meet the power consumption of 10
  • the annual usage time limit, the terminal cost is less than 5 US dollars, and the coverage is 20 dB more than the existing network;
  • the frequency band deployment scenario includes independent frequency band deployment, deployment in the protection band of LTE, and deployment with LTE.
  • the 3GPP has determined that the terminal uplink supports both single-tone and multi-tone transmission modes.
  • the single-tone transmission mode means that each transmission is based on a single subcarrier transmission mode, and the bandwidth of the subcarrier can be a relatively narrow bandwidth, such as 3.75 KHz, or a relatively wide bandwidth, such as 15 KHz;
  • Multi- The tone transmission mode means that at least one subcarrier can be allocated for each transmission, and up to 12 subcarriers can be allocated. For Multi-tone, it is currently determined to use a carrier spacing of 15 kHz.
  • the terminal needs to support both Single-tone and Multi-tone, and the terminal needs to indicate the support status of Single-tone and Multi-tone to the network side, but how to indicate the indication has not been determined, and will be discussed later.
  • the terminal is required to support both Single-tone and Multi-tone, for the initial access process, the terminal sends random access related information on the uplink.
  • transmission method including random access signal and Msg3
  • a direct extension of the existing system is to use the physical random access channel (PRACH) transmission mode and the Msg3 transmission mode of the existing system, but there is a problem that it is required to configure a terminal with a worst coverage level.
  • PRACH physical random access channel
  • the PRACH sequence and resources, for a large number of connected scenarios, will result in a large uplink resource overhead.
  • the terminal uplink supports both the Single-tone and the Multi-tone transmission modes, if the existing system configuration and transmission mode are adopted for the Msg3, the uplink coverage of the terminal cannot be guaranteed, and the base station cannot distinguish the uplink transmission mode of different terminals. It will not be possible for the base station to efficiently allocate uplink transmission resources for terminals using different transmission modes in the uplink.
  • the embodiments of the present invention provide a random access method, a base station, a terminal, and a computer storage medium, which can effectively meet the requirements of different terminal capabilities for uplink transmission.
  • An embodiment of the present invention provides a random access method, where the method includes:
  • the base station configures at least two types of random access parameters to generate configuration information, where the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource;
  • the at least two types of random access parameters respectively correspond to different uplink transmission modes.
  • the at least two types of random access parameters respectively correspond to different coverage levels.
  • the number of repeated transmissions of the random access parameters of different coverage levels is different.
  • the base station configures at least two types of random access parameters to generate configuration information. include:
  • the base station configures at least two types of random access sequences to generate configuration information; the uplink transmission modes corresponding to the at least two types of random access sequences are different.
  • the uplink transmission modes of the at least two types of random access sequences are different, and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are different.
  • the uplink transmission modes of the at least two types of random access sequences are different, and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are the same.
  • the time domain resources and/or the frequency domain resources occupied by the at least two types of random access sequences are different.
  • sequences of the at least two types of random access sequences are different.
  • the base station configures at least two types of random access parameters to generate configuration information, including:
  • the base station configures at least two types of random access sequences to generate configuration information; the at least two types of random access sequences have different coverage levels.
  • different types of random access sequences have the same transmission period, the same time domain location, and different frequency domain locations;
  • the transmission periods of different types of random access sequences are the same, the frequency domain locations are the same, and the time domain locations are different;
  • the transmission periods of different types of random access sequences are the same, and the time domain location and the frequency domain location are different;
  • the transmission period, the time domain location, and the frequency domain location of different types of random access sequences are different.
  • the method further includes: the base station receiving a random access sequence, determining, according to the random access sequence, and/or the time domain and/or frequency domain resources occupied by the random access sequence Transmission method and/or coverage level;
  • the uplink resource generation resource scheduling information is allocated based on the determination result, and the resource scheduling information is sent.
  • An embodiment of the present invention further provides a random access method, where the method includes:
  • the terminal receives configuration information;
  • the configuration information includes at least two types of random access parameters;
  • the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource;
  • a random access parameter is selected based on its own uplink transmission mode and/or coverage level, and a random access sequence is sent based on the random access parameter.
  • the method further includes: the terminal receiving resource scheduling information;
  • the uplink resource that is characterized based on the resource scheduling information sends Msg3.
  • the at least two types of random access parameters respectively correspond to different uplink transmission modes.
  • the at least two types of random access parameters respectively correspond to different coverage levels
  • the number of repeated transmissions of the random access parameters of different coverage levels is different.
  • the at least two types of random access sequences have different uplink transmission modes
  • the at least two types of random access sequences have different coverage levels.
  • the uplink transmission modes of the at least two types of random access sequences are different, and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are different; or
  • the time domain resources and/or the frequency domain resources occupied by the at least two types of random access sequences are different.
  • different types of random access sequences have the same transmission period, the same time domain location, and different frequency domain locations;
  • the transmission periods of different types of random access sequences are the same, and the frequency domain positions are the same. Different domain locations;
  • the transmission periods of different types of random access sequences are the same, and the time domain location and the frequency domain location are different;
  • the transmission period, the time domain location, and the frequency domain location of different types of random access sequences are different.
  • sequences of the at least two types of random access sequences are different.
  • An embodiment of the present invention further provides a base station, where the base station includes: a processing unit and a first sending unit;
  • the processing unit is configured to configure at least two types of random access parameters to generate configuration information, where the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource;
  • the first sending unit is configured to send configuration information generated by the processing unit.
  • the at least two types of random access parameters respectively correspond to different uplink transmission modes
  • the at least two types of random access parameters respectively correspond to different coverage levels; wherein the repeated access times of the random access parameters of the different coverage levels are different.
  • the processing unit is configured to configure at least two types of random access sequences to generate configuration information; and the uplink transmission modes corresponding to the at least two types of random access sequences are different.
  • the uplink transmission modes of the at least two types of random access sequences are different, and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are different.
  • the uplink transmission modes of the at least two types of random access sequences are different, and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are the same.
  • the time domain resources and/or the frequency domain resources occupied by the at least two types of random access sequences are different.
  • sequences of the at least two types of random access sequences are different.
  • the processing unit is configured to configure at least two types of random access sequences to generate configuration information; and the at least two types of random access sequences have different coverage levels.
  • different types of random access sequences have the same transmission period, the same time domain location, and different frequency domain locations;
  • the transmission periods of different types of random access sequences are the same, the frequency domain locations are the same, and the time domain locations are different;
  • the transmission periods of different types of random access sequences are the same, and the time domain location and the frequency domain location are different;
  • the transmission period, the time domain location, and the frequency domain location of different types of random access sequences are different.
  • the base station further includes a first receiving unit
  • the first receiving unit is configured to receive a random access sequence
  • the processing unit is configured to determine an uplink transmission mode and/or a coverage level based on a random access sequence received by the first receiving unit, and/or a time domain/frequency domain resource occupied by the random access sequence; Resulting that the uplink resource is generated to generate resource scheduling information;
  • the first sending unit is further configured to send resource scheduling information generated by the processing unit.
  • the embodiment of the present invention further provides a terminal, where the terminal includes: a second receiving unit and a second sending unit;
  • the second receiving unit is configured to receive configuration information; the configuration information includes at least two types of random access parameters; and the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency Domain resource
  • the second sending unit is configured to select a type of random access parameter based on its own uplink transmission mode and/or coverage level, and send a random access sequence based on the random access parameter.
  • the second receiving unit is further configured to receive resource scheduling information
  • the second sending unit is further configured to perform resource scheduling based on the second receiving unit
  • the uplink resource of the information representation is sent to Msg3.
  • the at least two types of random access parameters respectively correspond to different uplink transmission modes
  • the at least two types of random access parameters respectively correspond to different coverage levels; wherein the repeated access times of the random access parameters of the different coverage levels are different.
  • the at least two types of random access sequences have different uplink transmission modes
  • the at least two types of random access sequences have different coverage levels.
  • the uplink transmission modes of the at least two types of random access sequences are different, and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are different; or
  • the time domain resources and/or the frequency domain resources occupied by the at least two types of random access sequences are different.
  • different types of random access sequences have the same transmission period, the same time domain location, and different frequency domain locations;
  • the transmission periods of different types of random access sequences are the same, the frequency domain locations are the same, and the time domain locations are different;
  • the transmission periods of different types of random access sequences are the same, and the time domain location and the frequency domain location are different;
  • the transmission period, the time domain location, and the frequency domain location of different types of random access sequences are different.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are used to perform random access applied to a base station according to an embodiment of the present invention. method.
  • An embodiment of the present invention further provides a computer storage medium, where the computer storage medium
  • the computer-executable instructions are stored for performing the random access method applied to the terminal according to the embodiment of the present invention.
  • the base station configures at least two types of random access parameters to generate configuration information, where the random access parameter includes at least one of the following parameters: : random access sequence, time domain resource, frequency domain resource; send the configuration information.
  • the terminal receives configuration information; the configuration information includes at least two types of random access parameters; and the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource; A random access parameter is selected according to the uplink transmission mode and/or the coverage level, and the random access sequence is sent based on the random access parameter.
  • the technical solution of the embodiment of the present invention does not need to increase the overhead of the uplink resource; on the other hand, the uplink coverage of the terminal is ensured, and the terminal adopting different transmission modes adopts different random access according to its own uplink transmission mode.
  • the resource enables the base station to determine which transmission mode the terminal uses in the uplink and configure the corresponding uplink resource for the terminal. Effectively meet the needs of different terminal capabilities for uplink transmission.
  • FIG. 1 is a schematic diagram of a random access procedure in the prior art
  • FIG. 2 is a schematic diagram of a random access sequence in the prior art
  • FIG. 3 is a schematic flowchart of a random access method according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of a configuration of a random access parameter in a random access method according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of another random access parameter configuration of a random access method according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a random access method according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic flowchart of a random access method according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of another composition structure of a base station according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a structure of a terminal according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a random access procedure in the prior art; the existing random access procedure can be referred to FIG. 1 .
  • the configuration for the PRACH is for each cell configuration. Specifically, each cell adopts a PRACH preamble format, and the random access sequence format is generally determined according to cell coverage. For example, when the cell coverage ranges from 0 to 100 kilometers (km), and PRACH format 3 is used, the used terminals in the entire cell adopt PRACH format 3.
  • the uplink PRACH resource of each cell is configured by Radio Resource Control (RRC), and a random access resource configuration indicates periodic uplink random access resources, and the random access resources are the same for all terminals.
  • RRC Radio Resource Control
  • the downlink random access response (RAR) and the uplink Msg3 are transmitted in the following manner: the downlink RAR: the eNB configures the time advance (TA, Time Alignment), the usage resource of the Msg3, and the like for the terminal in the RAR.
  • the upstream Msg3 The UE transmits Msg3 according to the TA and Msg3 resources configured by the eNB, and the Msg3 includes the unique identifier (C-RNTI) of the UE.
  • C-RNTI unique identifier
  • the random access sequence and resource allocation mode are as follows: Each cell has 64 available random access sequences, as shown in FIG. 2 . The UE will select one of them (or specified by the eNodeB) to transmit on the PRACH. These sequences can be divided into two parts, one for contention based random access and the other for non-contention based random access. The contention-based random access sequence can be further divided into group A and group B (group A and group B) (where group B may not exist).
  • the available PRACH time-frequency resources of the cell are determined by the prach-ConfigIndex field and the prach-FrequencyOffset field of the System Message 2 (SIB2) message; once these two fields are determined, random access is made to all UEs accessing the cell.
  • SIB2 System Message 2
  • the format and optional PRACH resources are fixed. Each PRACH resource occupies a bandwidth of 6 consecutive resource blocks (RBs) in the frequency domain.
  • RBs resource blocks
  • For Frequency Division Duplexing (FDD) look up Table 5.7.1-2 of 3GPP TS36.211 through the prach-ConfigIndex field to obtain a random access sequence format (preamble format) and can be used to transmit a random access sequence ( Preamble)
  • the system frame and subframe number to determine the optional time domain resource.
  • the starting RB in the frequency domain is obtained by the prach-FrequencyOffset field, thereby determining the frequency domain resource (because the FDD has only one frequency domain resource in a
  • a random access method according to an embodiment of the present invention is proposed based on the random access procedure described above.
  • FIG. 3 is a schematic flowchart of a random access method according to Embodiment 1 of the present invention; as shown in FIG. 3, the method includes:
  • Step 101 The base station configures at least two types of random access parameters to generate configuration information, where the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource.
  • the base station configures at least two types of random access parameters for different uplink transmission modes or different coverage levels, that is, the at least two types of random access parameters respectively correspond to different uplink transmission modes. Or the at least two types of random access parameters respectively correspond to different coverage levels; and the repeated transmission times of the random access parameters of the different coverage levels are different.
  • the at least two types of random access parameters enable the terminal to select a corresponding type of random access parameter according to its uplink transmission mode or coverage level to perform random access sequence transmission.
  • the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource.
  • Step 102 Send the configuration information.
  • the sending the configuration information is: sending the configuration information to a terminal.
  • the base station configures at least two types of random access parameter generation configurations.
  • the information includes: the base station configures at least two types of random access sequences to generate configuration information; and the uplink transmission manners corresponding to the at least two types of random access sequences are different.
  • the sequence of the at least two types of random access sequences may be different.
  • the base station is configured with two types of random access sequences (PRACH preambles), where the first type of random access sequence can correspond to the first type of uplink transmission mode, and correspondingly, the second type of random access sequence can be Corresponding to the second uplink transmission mode, where the first uplink transmission mode may be a transmission mode in which the uplink uses a 3.75 kHz subcarrier bandwidth, and the second uplink transmission mode may be a transmission mode in which the uplink uses a 15 kHz subcarrier bandwidth. .
  • PRACH preambles two types of random access sequences
  • a random access sequence in a PRACH preambles set is used by a terminal that transmits a PUSCH/PUCCH in a 3.75 kHz subcarrier bandwidth, and a random access sequence in another PRACH preambles set is used in an uplink.
  • the terminal of the PUSCH/PUCCH is transmitted using the 15 kHz subcarrier bandwidth.
  • the uplink transmission mode corresponding to the at least two types of random access sequences is different, and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are different.
  • the uplink frequency domain transmission bandwidth and the subcarrier bandwidth of the base station configured with different types of random access sequences may be different, so that the base station can identify the manner in which the terminal uplinks the PUSCH/PUCCH according to the received random access sequence.
  • the frequency domain subcarrier bandwidth of the random access sequence can be set to X Hz, where one embodiment of X is 156.25; for the uplink, 15 kHz subcarrier bandwidth is used.
  • the frequency domain subcarrier bandwidth of the random access sequence can be set to Y Hz, and an embodiment of Y is 312.5.
  • the uplink transmission mode corresponding to the at least two types of random access sequences is different, and the at least two types of the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are the same.
  • the time domain resources and/or frequency domain resources occupied by the random access sequence are different. Specific As a first implementation manner, the transmission periods of different types of random access sequences are the same, the time domain locations are the same, and the frequency domain locations are different. As a second implementation manner, the transmission periods of different types of random access sequences are the same. The frequency domain has the same location and the time domain location is different. As a third implementation manner, different types of random access sequences have the same transmission period, and the time domain location and the frequency domain location are different. As a fourth implementation manner, different classes of random numbers are used. The transmission sequence, time domain location, and frequency domain location of the access sequence are different.
  • the base station configures different types of random access sequences (PRACH preambles), and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth are the same, and the time domain and/or frequency domain resources occupied by the random access sequence are used.
  • PRACH preambles different types of random access sequences
  • the base station can identify the manner in which the terminal uplinks the PUSCH/PUCCH according to the received random access sequence.
  • a) different types of random access sequences may have the same transmission period and time domain location, but different frequency offsets may be used in the frequency domain to stagger resources occupied by different classes of random access sequences; b) different categories The random access sequence has the same transmission period and frequency domain location, but different time domain subframe offsets may be used in the time domain to make resources occupied by different types of random access sequences staggered; c) different types of random connections The transmission period of the incoming sequence is the same, but there are certain offsets in the time domain and the frequency domain to make the resources occupied by different types of random access sequences staggered; d) the transmission period and time domain bias of different types of random access sequences Both the shift and the frequency domain offset are different, so that resources occupied by different classes of random access sequences are staggered.
  • the base station is configured to generate configuration information by using at least two types of random access parameters, where the base station configures at least two types of random access sequence to generate configuration information, and the at least two types of random access sequences correspond to Coverage levels are different. The number of repeated transmissions of the random access sequences of different coverage levels is different.
  • the base station configures different random access sequences for different coverage levels; correspondingly, the repeated transmission times of the random access sequences of different coverage levels are different.
  • a 3.75 kHz subcarrier bandwidth is used for uplink.
  • the random access sequence used by the terminal that sends the PUSCH/PUCCH can configure different random access sequence formats for different coverage level terminals.
  • the frequency domain bandwidth of the random access sequence may be set to a single subcarrier bandwidth, repeated N_L times in the time domain; for medium coverage terminals (eg, coverage level) For M), the frequency domain bandwidth of the random access sequence (PRACH preamble) can be set to M_K subcarrier bandwidths, and the M_P times are repeated in the time domain; for the better coverage terminals (for example, the coverage level is D), the random access sequence ( The frequency domain bandwidth of the PRACH preamble can be set to D_K subcarrier bandwidths, and D_P times are repeated in the time domain. Specifically, it can be as shown in FIG. 5.
  • the coverage level may represent the distance of the terminal from the base station, or may represent the signal strength of the terminal receiving the base station.
  • the technical solution of the embodiment of the present invention does not need to increase the overhead of the uplink resource; on the other hand, the uplink coverage of the terminal is ensured, and the terminal adopting different transmission modes adopts different random access resources according to its own uplink transmission mode. Therefore, the base station can determine which transmission mode is used by the terminal uplink, and configure corresponding uplink resources for the terminal. Effectively meet the needs of different terminal capabilities for uplink transmission.
  • FIG. 6 is a schematic flowchart of a random access method according to Embodiment 2 of the present invention; as shown in FIG. 6, the method includes:
  • Step 201 The terminal receives configuration information.
  • the configuration information includes at least two types of random access parameters.
  • the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource.
  • Step 202 Select a type of random access parameter based on its own uplink transmission mode and/or coverage level, and send a random access sequence based on the random access parameter.
  • the terminal receives configuration information, where the configuration information includes at least two types of random access parameters, and the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain. Resources.
  • the at least two types of random access parameters correspond to different uplinks. Transmission method or different coverage levels.
  • the terminal selects a random access parameter based on its own uplink transmission mode (eg, subcarrier bandwidth, frequency domain transmission bandwidth, etc.) and/or coverage level, and transmits a random access sequence according to the selected random access parameter.
  • the technical solution of the embodiment of the present invention does not need to increase the overhead of the uplink resource; on the other hand, the uplink coverage of the terminal is ensured, and the terminal adopting different transmission modes adopts different random access resources according to its own uplink transmission mode. Therefore, the base station can determine which transmission mode is used by the terminal uplink, and configure corresponding uplink resources for the terminal. Effectively meet the needs of different terminal capabilities for uplink transmission.
  • FIG. 7 is a schematic flowchart of a random access method according to Embodiment 3 of the present invention; as shown in FIG. 7, the method includes:
  • Step 301 The base station configures at least two types of random access parameters to generate configuration information, and sends the configuration information.
  • the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource. .
  • Step 302 The terminal receives the configuration information, selects a random access parameter based on the uplink transmission mode and/or the coverage level, and sends a random access sequence based on the random access parameter.
  • the configuration information includes at least two types of random access.
  • Step 303 The base station receives a random access sequence, and determines an uplink transmission mode and/or an coverage level based on the random access sequence and/or the time domain and/or frequency domain resources occupied by the random access sequence.
  • Step 304 The base station allocates uplink resource generation resource scheduling information according to the determination result, and sends the resource scheduling information.
  • Step 305 The terminal receives the resource scheduling information, and sends an Msg3 according to the uplink resource that is characterized by the resource scheduling information.
  • the method may further include: the base station receiving the Msg3 sent by the terminal, and sending the conflict resolution information to the terminal.
  • the base station configures at least two types of random access parameters for different uplink transmission modes or different coverage levels, that is, the at least two types of random access parameters respectively correspond to different uplink transmission modes. Or the at least two types of random access parameters respectively correspond to different coverage levels; and the repeated transmission times of the random access parameters of the different coverage levels are different.
  • the at least two types of random access parameters enable the terminal to select a corresponding type of random access parameter according to its uplink transmission mode and/or coverage level to perform random access sequence transmission.
  • the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource.
  • the base station is configured to generate configuration information by using at least two types of random access parameters, where the base station configures at least two types of random access sequence to generate configuration information, and the at least two types of random access sequences correspond to The uplink transmission method is different.
  • the sequence of the at least two types of random access sequences may be different.
  • the base station is configured with two types of random access sequences (PRACH preambles), where the first type of random access sequence can correspond to the first type of uplink transmission mode, and correspondingly, the second type of random access sequence can be Corresponding to the second uplink transmission mode, where the first uplink transmission mode may be a transmission mode in which the uplink uses a 3.75 kHz subcarrier bandwidth, and the second uplink transmission mode may be a transmission mode in which the uplink uses a 15 kHz subcarrier bandwidth. .
  • PRACH preambles two types of random access sequences
  • a random access sequence in a PRACH preambles set is used by a terminal that transmits a PUSCH/PUCCH in a 3.75 kHz subcarrier bandwidth, and a random access sequence in another PRACH preambles set is used in an uplink.
  • the terminal of the PUSCH/PUCCH is transmitted using the 15 kHz subcarrier bandwidth.
  • the uplink transmission mode corresponding to the at least two types of random access sequences is different, and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are different.
  • the uplink frequency domain transmission bandwidth and the subcarrier bandwidth of the base station configured with different types of random access sequences may be different, so that the base station can identify the manner in which the terminal uplinks the PUSCH/PUCCH according to the received random access sequence.
  • the frequency domain subcarrier bandwidth of the random access sequence can be set to X Hz, where one embodiment of X is 156.25; for the uplink, 15 kHz subcarrier bandwidth is used.
  • the frequency domain subcarrier bandwidth of the random access sequence can be set to Y Hz, and an embodiment of Y is 312.5.
  • the uplink transmission mode corresponding to the at least two types of random access sequences is different, and the at least two types of the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are the same.
  • the time domain resources and/or frequency domain resources occupied by the random access sequence are different.
  • different types of random access sequences have the same transmission period, the same time domain location, and different frequency domain locations.
  • different types of random access sequences have the same transmission period.
  • the frequency domain location is the same, and the time domain location is different.
  • different types of random access sequences have the same transmission period, and the time domain location and the frequency domain location are different; as a fourth implementation manner, different categories The transmission period, time domain location, and frequency domain location of the random access sequence are different.
  • the base station configures different types of random access sequences (PRACH preambles), and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth are the same, and the time domain and/or frequency domain resources occupied by the random access sequence are used.
  • PRACH preambles different types of random access sequences
  • the base station can identify the manner in which the terminal uplinks the PUSCH/PUCCH according to the received random access sequence.
  • a) different types of random access sequences may have the same transmission period and time domain location, but different frequency offsets may be used in the frequency domain to stagger resources occupied by different classes of random access sequences; b) different categories The random access sequence has the same transmission period and frequency domain location, but different time domain subframe offsets may be used in the time domain to make resources occupied by different types of random access sequences staggered; c) different types of random connections
  • the transmission period of the incoming sequence is the same, but there is a certain offset in the time domain and the frequency domain to make different classes.
  • the resources occupied by other random access sequences are staggered; d) the transmission period, time domain offset, and frequency domain offset of different types of random access sequences are different, so that different types of random access sequences are occupied.
  • the resources are staggered.
  • the base station is configured to generate configuration information by using at least two types of random access parameters, where the base station configures at least two types of random access sequence to generate configuration information, and the at least two types of random access sequences correspond to Coverage levels are different. The number of repeated transmissions of the random access sequences of different coverage levels is different.
  • the base station configures different random access sequences for different coverage levels; correspondingly, the repeated transmission times of the random access sequences of different coverage levels are different.
  • different random access sequence formats may be configured for different coverage level terminals.
  • the frequency domain bandwidth of the random access sequence may be set to a single subcarrier bandwidth, repeated N_L times in the time domain; for medium coverage terminals (eg, coverage level) For M), the frequency domain bandwidth of the random access sequence (PRACH preamble) can be set to M_K subcarrier bandwidths, and the M_P times are repeated in the time domain; for the better coverage terminals (for example, the coverage level is D), the random access sequence ( The frequency domain bandwidth of the PRACH preamble can be set to D_K subcarrier bandwidths, and D_P times are repeated in the time domain. Specifically, it can be as shown in FIG. 5.
  • the coverage level may represent the distance of the terminal from the base station, or may represent the signal strength of the terminal receiving the base station.
  • the terminal receives configuration information, where the configuration information includes at least two types of random access parameters, and the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain. Resources.
  • the at least two types of random access parameters correspond to different uplink transmission modes or different coverage levels.
  • the terminal selects a random access parameter based on its own uplink transmission mode (eg, subcarrier bandwidth, frequency domain transmission bandwidth, etc.) and/or coverage level, and transmits a random access sequence according to the selected random access parameter.
  • the base station may determine the uplink of the terminal according to the type of the random access sequence or the time domain location and/or the frequency domain location occupied by the random access sequence.
  • the transmission mode and/or the coverage level in order to allocate different uplink resources for terminals of different uplink transmission modes and/or different coverage levels in the downlink RAR, so that the terminal can transmit Msg3 based on the allocated uplink resources.
  • the technical solution of the embodiment of the present invention does not need to increase the overhead of the uplink resource; on the other hand, the uplink coverage of the terminal is ensured, and the terminal adopting different transmission modes adopts different random access resources according to its own uplink transmission mode. Therefore, the base station can determine which transmission mode is used by the terminal uplink, and configure corresponding uplink resources for the terminal. Effectively meet the needs of different terminal capabilities for uplink transmission.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention; as shown in FIG. 8, the base station includes: a processing unit 41 and a first sending unit 42;
  • the processing unit 41 is configured to configure at least two types of random access parameter generation configuration information, where the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource;
  • the first sending unit 42 is configured to send configuration information generated by the processing unit 41.
  • the processing unit 41 configures at least two types of random access parameters for different uplink transmission modes or different coverage levels, that is, the at least two types of random access parameters respectively correspond to different uplink transmission modes. Or the at least two types of random access parameters respectively correspond to different coverage levels; and the repeated transmission times of the random access parameters of the different coverage levels are different.
  • the at least two types of random access parameters enable the terminal to select a corresponding type of random access parameter according to its uplink transmission mode or coverage level to perform random access sequence transmission.
  • the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, and a frequency domain resource.
  • the processing unit 41 is configured to configure at least two types of random access sequences to generate configuration information, and the uplink transmission modes corresponding to the at least two types of random access sequences are different.
  • the sequence of the at least two types of random access sequences may be different.
  • the processing unit 41 configures two types of random access sequences (PRACH preambles), where the first type of random access sequence can correspond to the first type of uplink transmission mode, and correspondingly, the second type of random access
  • the sequence may correspond to the second uplink transmission mode, where the first uplink transmission mode may be a transmission mode in which the uplink uses a 3.75 kHz subcarrier bandwidth, and the second uplink transmission mode may be a 15 kHz subcarrier bandwidth in the uplink. transfer method. Specifically, as shown in FIG.
  • a random access sequence in a PRACH preambles set is used by a terminal that transmits a PUSCH/PUCCH in a 3.75 kHz subcarrier bandwidth, and a random access sequence in another PRACH preambles set is used in an uplink.
  • the terminal of the PUSCH/PUCCH is transmitted using the 15 kHz subcarrier bandwidth.
  • the uplink transmission mode corresponding to the at least two types of random access sequences is different, and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are different.
  • the processing unit 41 configures an uplink frequency domain transmission bandwidth and a subcarrier bandwidth of different types of random access sequences to be different, so that the base station can identify, according to the received random access sequence, the terminal uplink transmission PUSCH/PUCCH.
  • the frequency domain subcarrier bandwidth of the random access sequence can be set to X Hz, where one embodiment of X is 156.25; for the uplink, 15 kHz subcarrier bandwidth is used.
  • the frequency domain subcarrier bandwidth of the random access sequence can be set to Y Hz, and an embodiment of Y is 312.5.
  • the uplink transmission mode corresponding to the at least two types of random access sequences is different, and the at least two types of the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are the same.
  • the time domain resources and/or frequency domain resources occupied by the random access sequence are different. Specific As a first implementation manner, the transmission periods of different types of random access sequences are the same, the time domain locations are the same, and the frequency domain locations are different. As a second implementation manner, the transmission periods of different types of random access sequences are the same. The frequency domain has the same location and the time domain location is different. As a third implementation manner, different types of random access sequences have the same transmission period, and the time domain location and the frequency domain location are different. As a fourth implementation manner, different classes of random numbers are used. The transmission sequence, time domain location, and frequency domain location of the access sequence are different.
  • the processing unit 41 configures different types of random access sequences (PRACH preambles) to have the same uplink frequency domain transmission bandwidth and/or subcarrier bandwidth, and the time domain occupied by the random access sequence and/or Or the frequency domain resources are different, so that the processing unit 41 can identify the manner in which the terminal uplinks the PUSCH/PUCCH according to the received random access sequence.
  • PRACH preambles random access sequences
  • a) different types of random access sequences may have the same transmission period and time domain location, but different frequency offsets may be used in the frequency domain to stagger resources occupied by different classes of random access sequences; b) different categories The random access sequence has the same transmission period and frequency domain location, but different time domain subframe offsets may be used in the time domain to make resources occupied by different types of random access sequences staggered; c) different types of random connections The transmission period of the incoming sequence is the same, but there are certain offsets in the time domain and the frequency domain to make the resources occupied by different types of random access sequences staggered; d) the transmission period and time domain bias of different types of random access sequences Both the shift and the frequency domain offset are different, so that resources occupied by different classes of random access sequences are staggered.
  • the processing unit 41 is configured to configure at least two types of random access sequences to generate configuration information; the at least two types of random access sequences have different coverage levels. The number of repeated transmissions of the random access sequences of different coverage levels is different.
  • the processing unit 41 configures different random access sequences for different coverage levels; correspondingly, the number of repeated transmissions of random access sequences of different coverage levels is different.
  • a random access sequence used by a terminal that transmits a PUSCH/PUCCH using a 3.75 kHz subcarrier bandwidth in the uplink may be differently applied.
  • Cover level terminals are configured with different random access sequence formats.
  • the frequency domain bandwidth of the random access sequence may be set to a single subcarrier bandwidth, repeated N_L times in the time domain; for medium coverage terminals (eg, coverage level) For M), the frequency domain bandwidth of the random access sequence (PRACH preamble) can be set to M_K subcarrier bandwidths, and the M_P times are repeated in the time domain; for the better coverage terminals (for example, the coverage level is D), the random access sequence ( The frequency domain bandwidth of the PRACH preamble can be set to D_K subcarrier bandwidths, and D_P times are repeated in the time domain. Specifically, it can be as shown in FIG. 5.
  • the coverage level may represent the distance of the terminal from the base station, or may represent the signal strength of the terminal receiving the base station.
  • FIG. 9 is another schematic structural diagram of a base station according to an embodiment of the present invention. As shown in FIG. 9, the base station further includes a first receiving unit 43;
  • the first receiving unit 43 is configured to receive a random access sequence
  • the processing unit 41 is configured to determine an uplink transmission mode and/or an coverage level based on the random access sequence received by the first receiving unit 43 and/or the time domain/frequency domain resource occupied by the random access sequence; Allocating uplink resource generation resource scheduling information based on the judgment result;
  • the first sending unit 42 is further configured to send the resource scheduling information generated by the processing unit 41.
  • the processing unit 41 may be based on the type of the random access sequence or the time domain location occupied by the random access sequence. And determining the uplink transmission mode and/or the coverage level of the terminal in the frequency domain, so as to allocate different uplink resources for terminals of different uplink transmission modes and/or different coverage levels in the downlink RAR, so that the terminal can facilitate the uplink based on the allocation.
  • the processing unit 41 in the base station may be implemented by a central processing unit (CPU), a digital signal processor (DSP), or a programmable gate in the base station.
  • CPU central processing unit
  • DSP digital signal processor
  • the first transmitting unit 42 and the first receiving unit 43 in the base station may be implemented by a transceiver antenna or a transceiver in the base station in practical applications.
  • FIG. 10 is a schematic structural diagram of a terminal according to an embodiment of the present invention; as shown in FIG. 10, the terminal includes: a second receiving unit 51 and a second sending unit 52;
  • the second receiving unit 51 is configured to receive configuration information; the configuration information includes at least two types of random access parameters; and the random access parameter includes at least one of the following parameters: a random access sequence, a time domain resource, Frequency domain resources;
  • the second sending unit 52 is configured to select a type of random access parameter based on its own uplink transmission mode and/or coverage level, and send a random access sequence based on the random access parameter.
  • the uplink transmission modes corresponding to the at least two types of random access sequences are different.
  • the sequence of the at least two types of random access sequences may be different.
  • the base station is configured with two types of random access sequences (PRACH preambles), where the first type of random access sequence can correspond to the first type of uplink transmission mode, and correspondingly, the second type of random access sequence can be Corresponding to the second uplink transmission mode, where the first uplink transmission mode may be a transmission mode in which the uplink uses a 3.75 kHz subcarrier bandwidth, and the second uplink transmission mode may be a transmission mode in which the uplink uses a 15 kHz subcarrier bandwidth. .
  • PRACH preambles two types of random access sequences
  • a random access sequence in a PRACH preambles set is used by a terminal that transmits a PUSCH/PUCCH in a 3.75 kHz subcarrier bandwidth, and a random access sequence in another PRACH preambles set is used in an uplink.
  • the uplink transmission mode corresponding to the at least two types of random access sequences is different, and the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are different.
  • the uplink frequency domain transmission bandwidth and the subcarrier bandwidth of the different types of random access sequences may be different, so that the base station can identify the manner in which the terminal uplinks the PUSCH/PUCCH according to the received random access sequence.
  • the frequency domain subcarrier bandwidth of the random access sequence may be set to XHz, where one embodiment of X is 156.25; for the uplink, 15 kHz subcarrier bandwidth is used for transmission.
  • the frequency domain subcarrier bandwidth of the random access sequence can be set to Y Hz, where an embodiment of Y is 312.5.
  • the uplink transmission mode corresponding to the at least two types of random access sequences is different, and the at least two types of the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth corresponding to the at least two types of random access sequences are the same.
  • the time domain resources and/or frequency domain resources occupied by the random access sequence are different.
  • different types of random access sequences have the same transmission period, the same time domain location, and different frequency domain locations.
  • different types of random access sequences have the same transmission period.
  • the frequency domain location is the same, and the time domain location is different.
  • different types of random access sequences have the same transmission period, and the time domain location and the frequency domain location are different; as a fourth implementation manner, different categories The transmission period, time domain location, and frequency domain location of the random access sequence are different.
  • the uplink frequency domain transmission bandwidth and/or the subcarrier bandwidth of different types of random access sequences are the same, and the time domain and/or frequency domain resources occupied by the random access sequence are different.
  • Different types of random access sequences occupy resources staggered; b) different types of random access sequences have the same transmission period and frequency domain location, but different time domain sub-frame offsets can be used in the time domain to make different categories of random
  • the resources occupied by the access sequence are staggered; c) the transmission periods of different types of random access sequences are the same, but there are certain offsets in the time domain and the frequency domain to make the resources occupied by different types of random access sequences staggered; d)
  • the transmission period, time domain offset and frequency domain offset of different types of random access sequences are different, so that the resources occupied by different classes of random access sequences are staggered.
  • the at least two types of random access sequences have different coverage levels.
  • the number of repeated transmissions of the random access sequences of different coverage levels is different.
  • different coverage levels correspond to different random access sequences; correspondingly, the number of repeated transmissions of random access sequences of different coverage levels is different.
  • a random access sequence for example, a random access sequence used by a terminal that transmits a PUSCH/PUCCH using a 3.75 kHz subcarrier bandwidth in the uplink
  • different random access sequence formats may be configured for different coverage level terminals.
  • the frequency domain bandwidth of the random access sequence may be set to a single subcarrier bandwidth, repeated N_L times in the time domain; for medium coverage terminals (eg, coverage level) For M), the frequency domain bandwidth of the random access sequence (PRACH preamble) can be set to M_K subcarrier bandwidths, and the M_P times are repeated in the time domain; for the better coverage terminals (for example, the coverage level is D), the random access sequence ( The frequency domain bandwidth of the PRACH preamble can be set to D_K subcarrier bandwidths, and D_P times are repeated in the time domain. Specifically, it can be as shown in FIG. 5.
  • the coverage level may represent the distance of the terminal from the base station, or may represent the signal strength of the terminal receiving the base station.
  • the second receiving unit 51 receives configuration information, where the configuration information includes at least two types of random access parameters; the random access parameter includes at least one of the following parameters: a random access sequence, a time domain Resources, frequency domain resources.
  • the at least two types of random access parameters correspond to different uplink transmission modes and/or different coverage levels; and the different coverage levels are randomly connected. The number of repeated transmissions of the input parameters is different.
  • the second sending unit 52 selects a random access parameter based on its own uplink transmission mode (eg, subcarrier bandwidth, frequency domain transmission bandwidth, etc.) and/or coverage level, and sends random according to the selected random access parameter. Access sequence.
  • the second receiving unit 51 is further configured to receive resource scheduling information.
  • the second sending unit 52 is further configured to send an Msg3 based on the uplink resource characterized by the resource scheduling information received by the second receiving unit 51.
  • the second sending unit 52 in the terminal may be implemented by a CPU, a DSP or an FPGA in the terminal in combination with a transmitting antenna or a transmitter; the second receiving unit 51 in the terminal, In practical applications, it can be implemented by a receiving antenna or receiver in the terminal.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing storage device includes the following steps: the foregoing storage medium includes: a mobile storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk or an optical disk.
  • optical disk A medium that can store program code.
  • the above-described integrated unit of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a standalone product.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a mobile storage device, a ROM, a RAM, a magnetic disk, or an optical disk.
  • the technical solution of the embodiment of the present invention generates configuration information by configuring at least two types of random access parameters by the base station, so that the terminal selects a type of random access based on its own uplink transmission mode and/or coverage level.
  • the parameter, the random access sequence is sent according to the random access parameter, and the overhead of the uplink resource does not need to be increased; on the other hand, the uplink coverage of the terminal is ensured, and the terminal adopting different transmission modes adopts different according to the uplink transmission mode of the terminal.
  • the random access resource enables the base station to determine which transmission mode the terminal uses in the uplink and configure the corresponding uplink resource for the terminal. Effectively meet the needs of different terminal capabilities for uplink transmission.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

L'invention concerne un procédé d'accès aléatoire, une station de base, un terminal, et un support de stockage informatique. Le procédé comporte les étapes suivantes: une station de base configure au moins deux types de paramètres d'accès aléatoire pour générer des informations de configuration, les paramètres d'accès aléatoire comportant au moins un des paramètres suivants: séquences d'accès aléatoire, ressources en domaine temporel, et ressources en domaine fréquentiel; et les informations de configuration sont émises.
PCT/CN2017/072282 2016-02-03 2017-01-23 Procédé d'accès aléatoire, station de base, terminal, et support de stockage informatique WO2017133555A1 (fr)

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