WO2016188158A1 - Procédé pour un accès aléatoire, station de base et équipement utilisateur - Google Patents

Procédé pour un accès aléatoire, station de base et équipement utilisateur Download PDF

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Publication number
WO2016188158A1
WO2016188158A1 PCT/CN2016/074460 CN2016074460W WO2016188158A1 WO 2016188158 A1 WO2016188158 A1 WO 2016188158A1 CN 2016074460 W CN2016074460 W CN 2016074460W WO 2016188158 A1 WO2016188158 A1 WO 2016188158A1
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Prior art keywords
network
prach configuration
user equipment
configuration index
index table
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English (en)
Chinese (zh)
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杜婷
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/02—Hybrid access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/08—Trunked mobile radio systems

Definitions

  • the present application relates to, but is not limited to, communication technologies, and in particular, to a random access method, a base station, and a user equipment.
  • the trunking communication system is developed to meet the needs of industry users for command and dispatch, etc. It is a dedicated wireless communication system for specific industry applications.
  • the main features of the trunking communication system different from the public radio mobile communication system are: in addition to providing the two-way calling function of the mobile phone, it can also provide group (group) calls, full calls, and even establish call priority levels in the system, and can perform Priority call, emergency call, etc., which are not available in general mobile phones; special functions such as dynamic reorganization and virtual private network in the system are also provided. These features are especially suitable for police, national security department-specific communications, and command and dispatch needs for airports, customs, public transportation, disaster relief, etc.
  • the trunking communication system is in government departments, public safety, emergency telecommunications, electric power, civil aviation, petrochemical, military and It has a wide range of applications in enterprises and other fields. It is a versatile and high-performance wireless communication system, and has formed a dedicated communication network independent of the public mobile communication network around the world.
  • Public network cluster refers to the development of specific trunking communication services based on the existing public mobile communication network.
  • 3GPP Third Generation Partnership Projects
  • IOPS isolated E-UTRAN Operation
  • the so-called IOPS network mode means that when the base station fails to transmit signaling and data normally in the event of a loop interruption or a loop failure, it can still provide a certain level for the cluster type user equipment. Communication capabilities. After the network mode is enabled, the IOPS network mode only provides services to the cluster-type user equipment, and does not allow ordinary user equipments to access the network mode.
  • the existing technical solutions have the following problems: after the cluster network is started, the base station side cannot determine whether the user equipment requested to be accessed belongs to a common type user equipment or a cluster type user equipment, and thus cannot be used only for the cluster type user equipment. The access request responds.
  • the embodiment of the present invention provides a method, a base station, and a user equipment for random access, which can ensure that the base station side only responds to an access request of a specific user equipment after the specific network is started.
  • the embodiment of the invention provides a method for random access, including:
  • the base station broadcasts and/or sends the first network information to the user equipment in the covered cell, where the first network information is used to notify the covered cell.
  • the first user equipment stops using the normal physical random access channel (PRACH) configuration index table and starts using the preset dedicated PRACH configuration index table;
  • PRACH physical random access channel
  • the base station broadcasts and/or sends the PRACH configuration parameter in a manner of a dedicated signaling, where the PRACH configuration parameter includes: a PRACH frequency domain resource offset and a PRACH configuration index number;
  • the base station When the base station detects a random access preamble sent by the user equipment belonging to the first user equipment on the predetermined time-frequency resource, the base station sends a random access response message to the user equipment, where the predetermined The time-frequency resource is determined by the base station according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the preset dedicated PRACH configuration index table.
  • the first network information includes: identification information of the first network; after the first user equipment reads the identification information of the first network, determining that the first network is started, stops Using the normal PRACH configuration index table and starting to use the preset dedicated PRACH configuration index table.
  • the identification information of the first network is a public land mobile network identifier (PLMN ID) dedicated to the first network.
  • PLMN ID public land mobile network identifier
  • the preset dedicated PRACH configuration index table is specific to the first network, the common PRACH configuration index table is used for the second network, the preset dedicated PRACH configuration index table and the common PRACH configuration index.
  • the time-frequency resources of the random access preamble indicated by the same index number in the table are different.
  • the first network is a cluster network
  • the second network is a common network
  • the first user equipment includes: a user equipment that supports the current cluster network and is expected to be accessed by the current cluster network.
  • the sending, by the base station, the first network information to the user equipment in the covered cell and/or transmitting the first network information in a dedicated signaling manner includes:
  • SIB system information block
  • the base station fills the first network information into a radio resource control (RRC) message and sends the RRC message to a user equipment in a connected state in the covered cell.
  • RRC radio resource control
  • the transmitting, by the base station, the PRACH configuration parameters by using a dedicated signaling manner includes:
  • the base station broadcasts an SIB, where the SIB includes the PRACH configuration parameter; and/or,
  • the base station fills the PRACH configuration parameter into an RRC message and sends the RRC message to the user equipment in the connected state in the covered cell.
  • the SIB is SIB2.
  • An embodiment of the present invention further provides another method for random access, where the method includes:
  • the user equipment When the user equipment belongs to the first user equipment, the user equipment reads the first network information that is broadcast by the base station and/or is sent in a dedicated signaling manner, and stops using the normal PRACH configuration index table according to the first network information. And start to use the preset dedicated PRACH configuration index table;
  • the user equipment reads the PRACH configuration parameter that is sent by the base station and/or is sent by using a dedicated signaling manner, where the PRACH configuration parameter includes: a PRACH frequency domain resource offset and a PRACH configuration index number;
  • the user equipment determines, according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the preset dedicated PRACH configuration index table, time-frequency resources to be used when sending a random access preamble;
  • the user equipment sends a random access preamble on the time-frequency resource
  • the user equipment receives a random access response message sent by the base station.
  • the first network information includes: identification information of the first network
  • the user equipment reads the first network information that is sent by the base station and/or is sent by using a dedicated signaling manner, and stops using the PRACH configuration index table according to the first network information and starts using the preset dedicated PRACH configuration index table.
  • the first user equipment After the first user equipment reads the identification information of the first network, it is determined that the first network has been started, stops using the normal PRACH configuration index table, and starts using the preset dedicated PRACH configuration index table.
  • the identification information of the first network is a PLMN ID specific to the first network.
  • the preset dedicated PRACH configuration index table is specific to the first network, the common PRACH configuration index table is used for the second network, the preset dedicated PRACH configuration index table and the common PRACH configuration index.
  • the time-frequency resources of the random access preamble indicated by the same index number in the table are different.
  • the first network is a cluster network
  • the second network is a common network
  • the first user equipment includes: a user equipment that supports the current cluster network and is expected to be accessed by the current cluster network.
  • An embodiment of the present invention provides a base station, where the base station includes:
  • a first sending unit configured to: after the first network is started, broadcast to the user equipment in the covered cell and/or send the first network information in a manner of dedicated signaling; wherein, the first network information is used by The first user equipment in the cell covered by the notification stops using the normal physical random access channel PRACH configuration index table and starts using the preset dedicated PRACH configuration index table;
  • the second sending unit is configured to: broadcast and/or send the PRACH configuration parameter in a manner of a dedicated signaling, where the PRACH configuration parameter includes: a PRACH frequency domain resource offset and a PRACH configuration index number;
  • a detecting unit configured to: when a random access preamble sent by the user equipment belonging to the first user equipment is detected on the predetermined time-frequency resource, send a random access response message to the user equipment, where the predetermined The time-frequency resource is determined by the base station according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the preset dedicated PRACH configuration index table.
  • the first network information includes: identification information of the first network; After the user equipment reads the identification information of the first network, it is determined that the first network has been started, stops using the normal PRACH configuration index table, and starts using the preset dedicated PRACH configuration index table.
  • the identification information of the first network is a PLMN ID specific to the first network.
  • the preset dedicated PRACH configuration index table is specific to the first network, the common PRACH configuration index table is used for the second network, the preset dedicated PRACH configuration index table and the common PRACH configuration index.
  • the time-frequency resources of the random access preamble indicated by the same index number in the table are different.
  • the first network is a cluster network
  • the second network is a common network
  • the first user equipment includes: a user equipment that supports the current cluster network and is expected to be accessed by the current cluster network.
  • the first sending unit is configured to:
  • the second sending unit is configured to:
  • the SIB includes the PRACH configuration parameter; and/or,
  • the PRACH configuration parameter is filled in an RRC message and sent to the user equipment in the connected state in the connected cell.
  • the SIB is SIB2.
  • An embodiment of the present invention provides a user equipment, where the user equipment includes:
  • a first reading unit configured to: when the user equipment belongs to the first user equipment, read first network information that is broadcast by the base station and/or sent by using dedicated signaling, and according to the first network information Stop using the normal PRACH configuration index table and start using the preset dedicated PRACH configuration index table;
  • a second reading unit configured to: read the base station broadcast and/or send by means of proprietary signaling
  • the PRACH configuration parameter includes: a PRACH frequency domain resource offset and a PRACH configuration index number
  • a determining unit configured to: determine, according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the preset dedicated PRACH configuration index table, a time-frequency resource to be used when sending a random access preamble;
  • a sending unit configured to: send a random access preamble on the time-frequency resource
  • the receiving unit is configured to: receive a random access response message sent by the base station.
  • the first network information includes: identification information of the first network
  • the first reading unit is configured to: after reading the identification information of the first network, determine that the first network has been started, stop using the normal PRACH configuration index table, and start using the preset dedicated PRACH configuration index table.
  • the identification information of the first network is a PLMN ID specific to the first network.
  • the preset dedicated PRACH configuration index table is specific to the first network, the common PRACH configuration index table is used for the second network, the preset dedicated PRACH configuration index table and the common PRACH configuration index.
  • the time-frequency resources of the random access preamble indicated by the same index number in the table are different.
  • the first network is a cluster network
  • the second network is a common network
  • the first user equipment includes: a user equipment that supports the current cluster network and is expected to be accessed by the current cluster network.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, the method of implementing the random access on a base station side when the computer executable instructions are executed.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, the method of implementing the random access on the user equipment side when the computer executable instructions are executed.
  • the base station sends the first network to the user equipment in the covered cell by means of broadcast and/or dedicated signaling.
  • Information wherein the first network information is used to notify in a covered cell
  • the first user equipment stops using the normal PRACH configuration index table and starts to use the preset dedicated PRACH configuration index table; the base station broadcasts and/or sends the PRACH configuration parameters in a dedicated signaling manner, where the PRACH configuration parameters are included a PRACH frequency domain resource offset and a PRACH configuration index number; the first user equipment determines to send a random according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the preset dedicated PRACH configuration index table.
  • the first user equipment sends a random access preamble on the time-frequency resource; and when the base station detects, on the time-frequency resource, the first user equipment sends The base station sends a random access response message to the first user equipment when the random access preamble is used.
  • 1 is a schematic diagram of a configuration of a PRACH slot in an existing LTE system
  • FIG. 2 is a schematic diagram of a composition of a Preamble in an existing LTE system
  • FIG. 3 is a schematic diagram of the composition of four formats of a Preamble in an existing LTE system
  • FIG. 4 is a schematic flowchart of a method for random access according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart diagram of another method for random access according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • PRACH time slots can be configured with up to 16 different layouts or resource configurations, as shown in FIG. 1 .
  • PRACH physical random access channel
  • the base station must process the PRACH quickly so that the message 2 (Msg2) of the random access procedure can be delivered within the required window.
  • Msg2 message 2
  • PRACH resources are generally better multiplexed in the time domain instead of the frequency domain.
  • Table 1 it is a Resource Allocation (RA) slot configuration table.
  • RA time slot configuration number RA slot transmission period / ms The number of the RA slot in the radio frame 0 20 1 1 20 4 2 20 7 3 10 1 4 10 4 5 10 7 6 5 1 7 5 2 8 5 3 9 10 1,4,7
  • one subframe includes 2 slots, and the duration of one radio frame is 10 milliseconds (ms).
  • the time-frequency transmission position of the random access preamble (Preamble) under various PRACH configurations in the Frequency Division Duplexing (FDD) mode and the Time Division Duplexing (TDD) mode will be described in detail.
  • Preamble is the cyclic prefix length T CP's (Cyclic Prefix, CP) and a length T SEQ preamble sequence (Preamble sequence) composition.
  • the LTE system gives five different random access preamble formats ( Preamble Format). Each format has a different length in the time domain, but it occupies 6 physical resource blocks (PRBs), that is, 72 subcarriers in the frequency domain.
  • PRBs physical resource blocks
  • Preamble Format T CP T SEQ 0 3168 ⁇ T s 24576 ⁇ T s 1 21024 ⁇ T s 24576 ⁇ T s 2 6240 ⁇ T s 2 ⁇ 24576 ⁇ T s 3 21024 ⁇ T s 2 ⁇ 24576 ⁇ T s 4 448 ⁇ T s 4096 ⁇ T s
  • T S is a time unit defined in the 3GPP standard, which is 1/37.72 microseconds ( ⁇ s).
  • Format 4 is unique to the TDD mode.
  • the Preamble of Format 4 is only sent in the Uplink Pilot Time Slot (UpPTS). It is mainly used in scenarios with small coverage.
  • UpPTS Uplink Pilot Time Slot
  • Format 1 and Format 3 use a longer CP, which is suitable for the case where the cell radius is large.
  • the repeated preamble sequences in Format 2 and Format 3 are suitable for cell environments with large path loss.
  • Format 0 occupies the length of one subframe
  • Format 1 and Format 2 occupy the length of two consecutive subframes
  • Format 3 occupies the length of three consecutive subframes.
  • the CP and the preamble sequence in each Preamble Format do not occupy the entire subframe (1 subframe is 1 ms or 1000 microseconds), and the remaining part is the guard time (Guard Period). , GP), which is necessary for the asynchronous upstream PRACH.
  • Guard Period Guard Period
  • the random access preamble sequence triggered by the Media Access Control (MAC) can only be sent on a specific time-frequency resource.
  • the position of PRACH in the frequency domain is semi-statically set by the upper layer, and is broadcasted by the parameter PRACH frequency domain resource offset (Prach-FreqOffset) in System Information Block 2 (SIB2), the value of Prach-FreqOffset. Represents the number of physical block resources, ranging from 0 to 94. There is no frequency hopping on the PRACH.
  • the parameter PRACH configuration index (value between 0 and 63) in SIB2 determines the location of the radio frame and subframe in which the PRACH can appear in the cell and the Preamble Format used.
  • Table 3 shows the PRACH configuration index table and the subframe position of the Preamble transmission in the FDD mode of the existing LTE system. Taking the PRACH Configuration Index 0 as an example, the system broadcast message SIB2 broadcasts the value of the PRACH Configuration Index. After the user equipment (User Equipment, UE) obtains the table 3, the Preamble Format is 0, and the PRACH only occupies one subframe.
  • the user equipment User Equipment, UE
  • the Preamble is sent in a radio frame with an even frame number.
  • the subframe number is 1, and it occupies one subframe.
  • Table 4 shows the Preamble format and the transmission density (Density Per 10ms, D RA ) and version (Version, r RA ) of various PRACH configurations in the existing LTE system TDD mode.
  • Table 5 shows the uplink/downlink configuration mode (Uplink-Downlink configuration) and the Uplink (U) subframe and downlink (Downlink) included in each Uplink-Downlink configuration in the existing LTE system TDD mode.
  • D subframes and special (S) subframes.
  • Table 6 shows the PRACH configuration index table in the TDD mode of the existing LTE system, and the time-frequency position corresponding to the Preamble transmission is indicated in Table 6.
  • the UE obtains the PRACH configuration index of 0 through SIB2.
  • the Preamble Format is 0, the Preamble occupies one subframe, and the transmission density D RA is 0.5, then 20 ms is sent.
  • the first digit 0 indicates that the frequency starts from the frequency resource index 0, and the second
  • the number 1 indicates the even-numbered radio frame
  • the third digit 0 indicates the first half of the radio frame
  • the fourth digit 2 indicates its starting subframe and is located in the third subframe between 2 consecutive downlink-to-uplink transition points.
  • the UE obtains its parameter PRACH Mask Index through proprietary signaling and finds its subframe resource from Table 7.
  • FIG. 1 , FIG. 2 , FIG. 3 , and Tables 1 to 7 are all existing technical solutions, and can be specifically understood by referring to the existing 3GPP standard protocol.
  • the first user equipment includes a cluster type user equipment, where the cluster type user equipment refers to a user equipment that supports the current cluster network and is expected to be accessed by the current cluster network; the second user equipment includes a common type user equipment.
  • the normal type user equipment refers to a user equipment that does not support the current cluster network and/or the current cluster network does not expect to access.
  • the foregoing user equipment may specifically The technical solutions provided by the embodiments of the present invention are not limited to the IOPS network mode, and are applicable to various communication scenarios that require only a part of the special user equipment to provide services.
  • the following is an example in which the first network is a cluster network and the second network is a common network.
  • the first user equipment is a cluster type user equipment, and the second user equipment is a normal type user equipment.
  • An embodiment of the present invention provides a method for random access. Based on the base station side, as shown in FIG. 4, the method includes the following steps:
  • Step 101 After the cluster network is started, the base station broadcasts and/or sends the cluster network information to the user equipment in the covered cell.
  • the user equipment in the covered cell includes a common type user equipment and a cluster type user equipment; the cluster network information is used to notify the cluster type user equipment in the covered cell to stop using the ordinary PRACH configuration index table and start using Preset a dedicated PRACH configuration index table.
  • the cluster network information sent by the base station may be used to explicitly or implicitly notify the cluster type user equipment to stop using the normal PRACH configuration index table and start using the preset dedicated PRACH configuration index table;
  • the cluster network information may be a message indicating that the cluster type user equipment stops using the normal PRACH configuration index table and starts to use the preset dedicated PRACH configuration index table; if it is an implicit notification manner,
  • the cluster network information may be: identification information of the cluster network; after the cluster type user equipment reads the identification information of the cluster network, and determines that the cluster network has been started, it is determined that the common use needs to be stopped.
  • the PRACH configures the index table and starts using the preset dedicated PRACH configuration index table.
  • the identification information of the cluster network may be a public land mobile network identifier (PLMN ID) dedicated to the cluster network.
  • PLMN ID public land mobile network identifier
  • the preset dedicated PRACH configuration index table is dedicated to the cluster network, and the common PRACH configuration index table is used in a common network, and the preset dedicated PRACH configuration index table and the common PRACH configuration index table are used.
  • the time-frequency resources of the random access preamble indicated by the same index number are not the same.
  • the base station broadcasts and/or uses dedicated signaling to user equipment in the covered cell.
  • Ways to send cluster network information including:
  • the base station broadcasts a system information block (SIB) to the user equipment in the covered cell, where the SIB includes the cluster network information; and/or,
  • SIB system information block
  • the base station fills the cluster network information into a Radio Resource Control (RRC) message and sends the RRC message to the user equipment in the connected state in the covered cell.
  • RRC Radio Resource Control
  • the SIB is SIB2.
  • the cluster network may be an IOPS network
  • the cluster type user equipment may be a UE supporting an IOPS network, which may be referred to as an IOPS UE
  • the IOPS UE selects to start using a preset dedicated PRACH configuration index table, the preset.
  • the dedicated PRACH configuration index table is different from the subframe resource indicated by the same index number in the normal PRACH configuration index table used in the common network, and the two configuration index tables are stored in the storage medium of the IOPS UE, the common type
  • the user equipment does not store the preset dedicated PRACH configuration index table.
  • the base station stores the foregoing two configuration index tables.
  • Step 102 The base station broadcasts and/or sends the PRACH configuration parameter in a manner of dedicated signaling.
  • the PRACH configuration parameter includes: a PRACH frequency domain resource offset and a PRACH configuration index number.
  • the base station broadcasts and/or sends the PRACH configuration parameters in a dedicated signaling manner, including:
  • the base station broadcasts an SIB, where the SIB includes the PRACH configuration parameter; and/or,
  • the base station fills the PRACH configuration parameter into an RRC message and sends the RRC message to the user equipment in the connected state in the covered cell.
  • the SIB is SIB2.
  • step 102 the base station has enabled the preset dedicated PRACH configuration index table.
  • Step 103 When the base station detects, on the predetermined time-frequency resource, the user equipment sends the When the machine accesses the preamble, the base station sends a random access response message to the user equipment.
  • the predetermined time-frequency resource is determined by the base station according to the PRACH configuration index number (that is, a PRACH configuration index), the PRACH frequency domain resource offset (that is, Prach-FreqOffset), and the preset. Determined by the dedicated PRACH configuration index table, the user equipment belongs to the cluster type user equipment, and the random access preamble is sent by the user equipment on the determined predetermined time-frequency resource.
  • the PRACH configuration index number that is, a PRACH configuration index
  • the PRACH frequency domain resource offset that is, Prach-FreqOffset
  • the base station enables the preset dedicated PRACH configuration index table, because the common type user equipment does not store the preset dedicated PRACH configuration index table, when a normal type user
  • the device may be in accordance with the normal PRACH configuration index table stored in the device (when the LTE system is in the FDD mode, it may be in Table 3; when the LTE system is in the TDD mode, it may be Table 6) Determines a time-frequency resource for transmitting a random access preamble (Preamble), and the time-frequency resource determined by the normal-type user equipment is different from the predetermined cluster-specific time-frequency resource.
  • Preamble a random access preamble
  • the base station detects the Preamble on the predetermined cluster dedicated time-frequency resource, and therefore, the base station does not detect the preamble sequence sent by the common type user equipment; in addition, since the cluster type user equipment is according to the base station Transmitting the Preamble on the predetermined cluster dedicated time-frequency resource determined by the PRACH configuration index, the Prach-FreqOffset, and the preset dedicated PRACH configuration index table, so that the base station can detect on the predetermined cluster dedicated time-frequency resource. Preamble sent to the cluster user equipment.
  • the base station sends the cluster network information to the user equipment in the covered cell by means of broadcast and/or dedicated signaling; wherein the coverage
  • the user equipment in the cell includes a common type user equipment and a cluster type user equipment; the cluster network information is used to notify the cluster type user equipment in the covered cell to stop using the normal PRACH configuration index table and start using the preset dedicated PRACH configuration.
  • the base station broadcasts and/or sends a PRACH configuration parameter in a manner of dedicated signaling, where the PRACH configuration parameter includes: a PRACH frequency domain resource offset and a PRACH configuration index number; when the base station is in a predetermined When the random access preamble sent by the user equipment is detected on the time-frequency resource, the base station sends a random access response message to the user equipment.
  • the base station After the cluster network is started, it is ensured that the base station side only responds to the access request of the cluster type user equipment.
  • An embodiment of the present invention provides another method for random access. Based on the UE side, as shown in FIG. 5, the method includes the following steps:
  • Step 201 When the user equipment belongs to the cluster type user equipment, the user equipment reads the cluster network information that the base station broadcasts and/or sends in a proprietary signaling manner, and stops using the common PRACH configuration index according to the cluster network information.
  • the table begins to use the preset dedicated PRACH configuration index table.
  • the cluster network information sent by the base station may be used to explicitly or implicitly notify the cluster type user equipment to stop using the normal PRACH configuration index table and start using the preset dedicated PRACH configuration index table;
  • the cluster network information may be a message indicating that the cluster type user equipment stops using the normal PRACH configuration index table and starts to use the preset dedicated PRACH configuration index table; if it is an implicit notification manner,
  • the cluster network information may be: identification information of the cluster network; after the cluster type user equipment reads the identification information of the cluster network, and determines that the cluster network has been started, it is determined that the common use needs to be stopped.
  • the PRACH configures the index table and starts using the preset dedicated PRACH configuration index table.
  • the identification information of the cluster network may be a public land mobile network identifier (PLMN ID) dedicated to the cluster network.
  • PLMN ID public land mobile network identifier
  • the preset dedicated PRACH configuration index table is dedicated to the cluster network, and the common PRACH configuration index table is used for a common network, and the preset dedicated PRACH configuration index table and the same index in the common PRACH configuration index table are used.
  • the time-frequency resources of the random access preamble indicated by the number are not the same.
  • Step 202 The user equipment reads the PRACH configuration parameter that is sent by the base station and/or is sent by using a dedicated signaling.
  • the PRACH configuration parameter includes: a PRACH frequency domain resource offset and a PRACH configuration index number.
  • Step 203 The user equipment determines, according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the preset dedicated PRACH configuration index table, a time-frequency resource to be used when sending a random access preamble.
  • Step 204 The user equipment sends a random access preamble on the time-frequency resource.
  • Step 205 The user equipment receives a random access response message sent by the base station.
  • the base station enables the preset dedicated a PRACH configuration index table, where the base station determines, according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the preset dedicated PRACH configuration index table stored by the base station, to detect a time-frequency resource of the Preamble, because The user equipment belongs to the cluster type user equipment, and the time-frequency resource of the Preamble that is determined by the base station is consistent with the time-frequency resource of the Preamble that is determined by the user equipment, and therefore, the base station may detect the The Preamble sent by the user equipment, so that the base station sends a random access response message (Msg2) to the user equipment.
  • Msg2 random access response message
  • the user equipment reads cluster network information that is broadcast by a base station and/or transmitted by using a dedicated signaling, and stops using the ordinary PRACH according to the cluster network information.
  • the cluster type user equipment is simply referred to as an IOPS UE, and the cluster network is assumed to be an IOPS network.
  • This embodiment includes the following steps:
  • Step 1 After the IOPS network is started, the base station enters the IOPS mode and sends a broadcast message and/or a dedicated signaling. After the IOPS UE reads the dedicated signaling or broadcast information sent by the base station, the previous PRACH configuration index table is disabled. The preset dedicated PRACH configuration index table (used in the IOPS network) is enabled for use in a normal network.
  • the preset dedicated PRACH configuration index table is stored in the IOPS UE, and the preset dedicated PRACH configuration index table is not stored in the normal type UE, and the previous PRACH configuration index table is still used.
  • the preset dedicated PRACH configuration index table is common to the normal type UE. The time-frequency resources indicated by the same index number in the PRACH configuration index table are different.
  • Step 2 The base station sends parameters such as PRACH configuration Index and Prach-FreqOffset through broadcast messages and/or proprietary signaling.
  • Step 3 After reading the parameters such as the PRACH configuration index and the Prach-FreqOffset sent by the base station, the normal type UE searches for the time-frequency resource of the PRACH in the normal PRACH configuration index table stored therein; after receiving the parameters sent by the base station, the IOPS UE The stored preset dedicated PRACH configuration index table looks up the time-frequency resource for transmitting the PRACH.
  • Step 4 After the IOPS network is started, the base station enables the preset dedicated PRACH configuration index table to determine the time-frequency resource for detecting the Preamble.
  • the base station can only detect the Preamble of the IOPS UE on the new time-frequency resource, and if successfully detected, Perform a random access response of Msg2.
  • the LTE system uses the FDD mode as an example to describe in detail the preset dedicated PRACH configuration index table in the embodiment of the present invention:
  • the preset dedicated PRACH configuration index table in the embodiment of the present invention may be designed according to the existing table 3.
  • the design principle is: the preset dedicated PRACH configuration index table is indicated by the same index number in Table 3.
  • the time-frequency resources used to send the Preamble need to be completely different.
  • the UE should start transmitting a Preamble with a Preamble Format of 0 in a subframe with an subframe number of 1 of an even radio frame (the Preamble only occupies a subframe with a subframe number of 1).
  • the base station After the IOPS network is started, the base station only detects the Preamble that the IOPS UE sends the Preamble Format to 0.
  • the PRACH configuration index in the preset dedicated PRACH configuration index table may be 0.
  • the frame number is modified to other subframes other than 1, such as subframes 0, 2, and 3, and even-numbered radio frames can be changed to odd-numbered radio frames.
  • the PRACH configuration index is 22, and according to Table 3, the UE should start Preamble with a Preamble Format of 1 in the subframe of any (Any) radio frame with the subframe number of 1,6 (Format is 1 for the Preamble length). For 2 consecutive subframes, so the Preamble occupies subframes with subframe numbers 1 and 2, 6 and 7), then in order to boot on the IOPS network
  • the subframe number corresponding to the PRACH configuration index of 22 in the preset dedicated PRACH configuration index table can be modified to (3, 8). ), here is only a schematic description, can also be modified to (3,9), (4,8), or (4,9), in line with the above design principles.
  • the PRACH configuration index is 25, and according to Table 3, the UE should start to send a Preamble with a Preamble Format of 1 in a subframe with any subframe number of 1, 4, and 7 (the Preamble occupied subframe number is 1).
  • the base station after the IOPS network is started, the base station only detects the Preamble whose Preamble Format is 1 sent by the IOPS UE.
  • the preset dedicated PRACH configuration is preset.
  • the subframe number corresponding to the PRACH configuration index of 25 in the index table can only be set to N/A.
  • the Preamble Format is 1, 2, 3, the contiguous subframes occupied by the Preamble are 2, 2, and 3 respectively. Therefore, when the Preamble Format indicated in the preset dedicated PRACH configuration index table is not 0, the consecutively occupied subframe numbers of the Preamble should also be completely inconsistent with those indicated in Table 3. Otherwise, interference may occur.
  • the PRACH configuration index 28 is taken as an example.
  • the Preamble Format is 1, the Preamble length is 2 consecutive subframes, the even radio frame, and the available subframe numbers are 0, 2, 4, 6, and 8, that is, the Preamble actual.
  • the occupied subframe numbers are 0 and 1, 2 and 3, 4 and 5, 6 and 7, 8 and 9, so the configuration has no free subframe number for IOPS mode configuration, and the index 28 configuration is preset.
  • the PRACH configuration index table should be N/A. And so on.
  • the preset dedicated PRACH configuration index table in the embodiment of the present invention may be as shown in Table 8.
  • Table 8 is only one possible implementation manner, and the present invention is implemented.
  • the preset dedicated PRACH configuration index table in is not limited to the form of Table 8.
  • the index number is 25,
  • the subframe numbers of 26, 27, 28, 29, 41, 42, 43, 44, 45, 54, 55, 56, 57, 58, 59 are set to N/A.
  • the LTE system takes the TDD mode as an example, and details the embodiment of the present invention.
  • the preset dedicated PRACH configuration index table :
  • the preset dedicated PRACH configuration index table described in the embodiment of the present invention may be designed according to the existing table 6.
  • the design principle is: the preset dedicated PRACH configuration index table and the same index number in Table 6.
  • the indicated time-frequency resources used to send the Preamble need to be completely different.
  • the Preamble Format is 1, 2, 3, the contiguous subframes occupied by the Preamble are 2, 2, and 3 respectively. Therefore, when the Preamble Format indicated in the preset dedicated PRACH configuration index table is not 0, the subframe number continuously occupied by the Preamble should also be completely inconsistent with that indicated in Table 6. Otherwise, interference may occur.
  • the TDD mode is 0, and the PRACH configuration index 20 is taken as an example.
  • the Preamble Format is 1, the Preamble length is 2 consecutive subframes, and the table 6 is configured.
  • the time-frequency resource configuration (0, 1, 0, 1) that is, the second subframe of the consecutive uplink subframe of the first half of the even subframe of the frequency index number 0, by looking up Table 5, that is, the starting subframe number is 3, then the index is occupied by the Preamble of 20.
  • the subframe number is 3 and 4, the spare subframe number is 2, and there are no consecutive consecutive 2 uplink subframes. Therefore, the subframe number configured by the Preamble time-frequency resource with index 20 in the IOPS mode cannot be changed. However, the configuration of its radio frame can be changed, such as changing to an odd radio frame.
  • the preset dedicated PRACH configuration index table described in the embodiment of the present invention may be as shown in Table 9, and Table 9 is only one possible implementation manner.
  • the preset dedicated PRACH configuration index table in the embodiment of the invention is not limited to the form of Table 9.
  • the PRACH configuration index is 0.
  • the Preamble Format is 0.
  • the uplink/downlink subframe configuration mode is 0, which means Preamble. It only takes up one sub-frame length.
  • the time-frequency resource configuration (0, 1, 0, 2) indicates that the UE should have a frequency index number of 0, the first half of the even-numbered radio frame, and its initial subframe is located between the two consecutive downlink-to-uplink transition points.
  • a sub-frame that is, a sub-frame number of 4, starts to transmit a Preamble (the Preamble only occupies a sub-frame number of 4), so that after the IOPS network is started, the base station only detects that the Preamble Format sent by the IOPS UE is 0.
  • Preamble under the above design principles, can modify the subframe number to other subframes other than 4, such as subframes 2, 3, 7, 8, 9, etc., and can also change even radio frames to odd radio frames.
  • the Preamble Format is 0 according to Table 4.
  • the uplink/downlink subframe configuration mode is 0, and (0, 0, 0, 1) indicates that the UE should be in the frequency index number.
  • an embodiment of the present invention further provides a base station.
  • the first user equipment is a cluster type user equipment
  • the second user equipment is a general type user equipment.
  • the first user equipment is a cluster type user equipment.
  • the embodiment of the present invention provides a base station 10. As shown in FIG. 6, the base station 10 includes:
  • the first sending unit 11 is configured to: after the cluster network is started, broadcast to the user equipment in the covered cell and/or send the cluster network information in a manner of dedicated signaling; wherein the cluster network The network information is used to notify the cluster type user equipment in the covered cell to stop using the normal PRACH configuration index table and start using the preset dedicated PRACH configuration index table;
  • the second sending unit 12 is configured to: broadcast and/or send the PRACH configuration parameter in a manner of a dedicated signaling, where the PRACH configuration parameter includes: a PRACH frequency domain resource offset and a PRACH configuration index number;
  • the detecting unit 13 is configured to: when detecting a random access preamble sent by the user equipment belonging to the cluster type user equipment on the predetermined time-frequency resource, sending a random access response message to the user equipment; wherein the predetermined The time-frequency resource is determined by the base station according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the preset dedicated PRACH configuration index table, where the random access preamble is performed by the user.
  • the device transmits on the predetermined time-frequency resource.
  • the cluster network information includes: identification information of the cluster network; after the cluster type user equipment reads the identification information of the cluster network, determining that the cluster network is started, and stopping using the common
  • the PRACH configures the index table and starts using the preset dedicated PRACH configuration index table.
  • the identification information of the cluster network is a PLMN ID dedicated to the cluster network.
  • the preset dedicated PRACH configuration index table is dedicated to the cluster network, and the common PRACH configuration index table is used in a common network, where the preset dedicated PRACH configuration index table and the common PRACH configuration index table are used.
  • the time-frequency resources of the random access preamble indicated by the same index number are not the same.
  • the first sending unit 11 is configured to:
  • the second sending unit 12 is configured to:
  • the SIB includes the PRACH configuration parameter; and/or,
  • the PRACH configuration parameter is filled in an RRC message and sent to the user equipment in the connected state in the connected cell.
  • the SIB is SIB2.
  • a base station is provided by the embodiment of the present invention, after the cluster network is started, the base station sends the cluster network information to the user equipment in the covered cell by using broadcast and/or dedicated signaling; wherein the cluster network information is used. Notifying the clustered user equipment in the covered cell to stop using the normal PRACH configuration index table and starting to use the preset dedicated PRACH configuration index table; the base station broadcasts and/or sends the PRACH configuration parameter in a proprietary signaling manner,
  • the PRACH configuration parameter includes: a PRACH frequency domain resource offset and a PRACH configuration index number; when the base station detects a random access preamble sent by a user equipment belonging to the cluster type user equipment on a predetermined time-frequency resource, The base station sends a random access response message to the user equipment.
  • an embodiment of the present invention further provides a user equipment.
  • the first network device is a cluster network
  • the second network is a common network.
  • the first user equipment is a cluster user equipment.
  • An embodiment of the present invention provides a user equipment 20. As shown in FIG. 7, the user equipment 20 includes:
  • the first reading unit 21 is configured to: when the user equipment 20 belongs to the cluster type user equipment, read the cluster network information that the base station broadcasts and/or sends in a proprietary signaling manner, and according to the cluster network information Stop using the normal PRACH configuration index table and start using the preset dedicated PRACH configuration index table;
  • the second reading unit 22 is configured to: read the PRACH configuration parameter that is sent by the base station and/or is sent by using a dedicated signaling manner, where the PRACH configuration parameter includes: a PRACH frequency domain resource offset and PRACH configuration index number.
  • the determining unit 23 is configured to: determine, according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the preset dedicated PRACH configuration index table, time-frequency resources to be used when sending a random access preamble;
  • the sending unit 24 is configured to: send a random access preamble on the time-frequency resource;
  • the receiving unit 25 is configured to: receive a random access response message sent by the base station.
  • the cluster network information includes: identification information of the cluster network;
  • the first reading unit 21 is configured to: after reading the identification information of the cluster network, determine that the cluster network has been started, stop using the normal PRACH configuration index table, and start using the preset dedicated PRACH. Configure the index table.
  • the identification information of the cluster network is a PLMN ID dedicated to the cluster network.
  • the preset dedicated PRACH configuration index table is dedicated to the cluster network, and the common PRACH configuration index table is used in a common network, where the preset dedicated PRACH configuration index table and the common PRACH configuration index table are used.
  • the time-frequency resources of the random access preamble indicated by the same index number are not the same.
  • a user equipment is provided by the embodiment of the present invention, and the user equipment reads cluster network information that is broadcast by the base station and/or is sent by using a dedicated signaling manner, and stops using the common PRACH configuration index table according to the cluster network information.
  • the user equipment starts to use a preset dedicated PRACH configuration index table; the user equipment reads the base station broadcast and/or in a manner of dedicated signaling, where the PRACH configuration parameters include: a PRACH frequency domain resource offset and a PRACH configuration index
  • the user equipment determines, according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the preset dedicated PRACH configuration index table, time-frequency resources to be used when sending a random access preamble; the user The device sends a random access preamble on the time-frequency resource; the user equipment receives the random access response message sent by the base station.
  • the division of modules is only a logical function division, and there may be another division manner in actual implementation.
  • the modules shown or discussed may be connected to each other through some interface, and may be in electrical, mechanical or other form.
  • the individual modules may or may not be physically separate, and may be or It may not be a physical unit. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may be physically included separately, or two or more modules may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of hardware plus software function modules.
  • an embodiment of the present invention further provides a base station, including: a wireless communication unit and a processor;
  • the wireless communication unit is configured to: after the first network is started, broadcast and/or send the first network information to the user equipment in the covered cell; wherein, the first network information is used by The first user equipment in the cell covered by the notification stops using the normal PRACH configuration index table and starts to use the preset dedicated PRACH configuration index table; and broadcasts and/or sends the PRACH configuration parameter in a dedicated signaling manner, where
  • the PRACH configuration parameters include: a PRACH frequency domain resource offset and a PRACH configuration index number;
  • the processor is configured to detect a random access preamble sent by the user equipment on a predetermined time-frequency resource, where the predetermined time-frequency resource is configured by the base station according to the PRACH configuration index number, the PRACH frequency
  • the domain resource offset and the preset dedicated PRACH configuration index table are determined;
  • the wireless communication unit is further configured to: when the processor detects a random access preamble sent by the user equipment belonging to the first user equipment on the predetermined time-frequency resource, send a random access response message to the user equipment .
  • an embodiment of the present invention further provides a user equipment, including: a wireless communication unit and a processor;
  • the processor is configured to: when the user equipment belongs to the first user equipment, read the cluster network information that the base station broadcasts and/or sends in a proprietary signaling manner, and stops using the common PRACH configuration index according to the cluster network information. And starting to use the preset dedicated PRACH configuration index table; reading the PRACH configuration parameter that is sent by the base station and/or sent by using a dedicated signaling, where the PRACH configuration parameter includes: a PRACH frequency domain resource offset And a PRACH configuration index number; and, according to the PRACH configuration index number, the PRACH frequency domain resource offset, and the Determining a dedicated PRACH configuration index table to determine a time-frequency resource to be used when transmitting a random access preamble;
  • the wireless communication unit is configured to: send a random access preamble on the time-frequency resource; and receive a random access response message sent by the base station.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, the method of implementing the random access on the base station side when the computer executable instructions are executed.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, where the computer executable instructions are implemented to implement the random access method on the user equipment side.
  • the above-described integrated modules implemented in the form of software functional units can be stored in a computer readable storage medium.
  • the software functional modules described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform some of the steps of the methods described in various embodiments of the present invention.
  • 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 codes. .
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • This application is not limited to any specific combination of hardware and software.
  • the embodiment of the present invention provides a method for a random access, a base station, and a user equipment. After the specific network is started, the base station side can ensure that the base station side only responds to the access request of the specific user equipment.

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

L'invention concerne un procédé pour un accès aléatoire, comprenant les opérations suivantes : lorsqu'un réseau de groupe est démarré, une station de base transmet des informations de réseau de groupe à un équipement utilisateur dans une cellule dans la couverture de la station de base, lorsque l'équipement utilisateur de type groupe dans la cellule dans la couverture reçoit les informations de réseau de groupe, l'équipement utilisateur détermine d'arrêter l'utilisation d'une table d'indice de configuration de PRACH générale et de démarrer l'utilisation d'une table d'indice de configuration de PRACH dédiée préétablie ; la station de base transmet un paramètre de configuration de PRACH, l'équipement utilisateur de type groupe détermine, sur la base du paramètre de configuration de PRACH et de la table d'indice de configuration de PRACH dédiée préétablie, une ressource temps-fréquence qui a besoin d'être utilisée lors de la transmission d'un préambule d'accès aléatoire, et la station de base détecte un préambule d'accès aléatoire transmis par l'équipement utilisateur de type groupe sur la ressource temps-fréquence correspondante et transmet un message de réponse d'accès aléatoire à l'équipement utilisateur de type groupe.
PCT/CN2016/074460 2015-05-22 2016-02-24 Procédé pour un accès aléatoire, station de base et équipement utilisateur Ceased WO2016188158A1 (fr)

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